Hadžievski, Ljupčo

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Authority KeyName Variants
orcid::0000-0002-3955-628X
  • Hadžievski, Ljupčo (100)
Projects
Photonics of micro and nano structured materials Capturing and quantitative analysis of multi-scale multi-channel diagnostic data.
Ministry of Science, Serbia [141034], German-Israel Foundation [149/2006] German-Israel Foundation [I-1024-2.7/2009]
Ministry of Science of Serbia [141034] Ministry of Science, Serbia [141034]
National Science Foundation (US) [2015616], Binational Science Foundation (US-Israel) [2015616], Institute for Basic Science, South Korea [IBS-R024-D1] Russian Ministry of Science and Education (14.Y26.31.0017)
Comision Nacional de Investigacion Cientifica y Technologica (CONICYT PAI Grant) [77180003] Deutsche Forschungsgemeinschaft [Ki482/14-1], DAAD German-Serbian Academic Exchange Programme [54384481, 680-00-00095/2012-09/5]
Engineering and Physical Sciences Research Council (project UNLOC), Ministry of Education and Science of the Russian Federation [14.B25.31.0003], U.S. Department of Energy at the Lawrence Livermore National Laboratory [DE-AC52-08NA28752] European Union, Greek national funds through the Operational Program Education and Lifelong Learning of the National Strategic Reference Framework (NSRF)- Research Funding Program: THALES - MACOMSYS. Investing in knowledge society through the European Social Fund
Federal Ministry of Education and Research of Germany [01IS17070] Federal Ministry of Education and Research of Germany (grant No. 01IS17070)
FP7 Project CHIMONO, FP7 Project MALICIA, EU project AQUTE German Research Foundation within the framework of the Heisenberg professorship programme [ES 434/8-1]
Heisenberg professorship programme (grant No. ES 434/8-1) CACOMEL - Nano-carbon based components and materials for high frequency electronics
CANTOR - Carbon-nanotube-based terahertz-to-optics rectenna Effects of assistive systems in neurorehabilitation: recovery of sensory-motor functions
Functional, Functionalized and Advanced Nanomaterials Modifikacija, sinteza i analiza nanostrukturnih materijala jonskim snopovima, gama zračenjem i vakuumskim deponovanjem
LOREAL- UNESCO through the Women in Science National Fellowship in Serbia LOREAL-UNESCO through the Women in Science National Fellowship in Serbia
Ministry of Science and Technological Development of the Republic of Serbia [141013], Natural Sciences and Engineering Research Council of Canada Ministry of Science of Republic Serbia [141034], German-Israel Foundation [149/2006]
Ministry of Science of Serbia [I4I034] Ministry of Science (Republic of Serbia) [141006, 141034], NATO Collaborative Linkage Grant [983316]
Ministry of Science, Serbia [141034], CARIPARO Foundation through Progetti di Eccellenza 2006., German-Israel Foundation [149/2006] NATO [CBP.EAP.CLG 983316]

Author's Bibliography

ECG waveform dataset for predicting defibrillation outcome in out-of-hospital cardiac arrested patients

Benini, Sergio; Ivanović, Marija D.; Savardi, Mattia; Kršić, Jelena; Hadžievski, Ljupčo; Baronio, Fabio

(2021)

TY  - JOUR
AU  - Benini, Sergio
AU  - Ivanović, Marija D.
AU  - Savardi, Mattia
AU  - Kršić, Jelena
AU  - Hadžievski, Ljupčo
AU  - Baronio, Fabio
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9547
AB  - The provided database of 260 ECG signals was collected from patients with out-of-hospital cardiac arrest while treated by the emergency medical services. Each ECG signal contains a 9 second waveform showing ventricular fibrillation, followed by 1 min of post-shock waveform. Patients’ ECGs are made available in multiple formats. All ECGs recorded during the prehospital treatment are provided in PFD files, after being anonymized, printed in paper, and scanned. For each ECG, the dataset also includes the whole digitized waveform (9 s pre- and 1 min post-shock each) and numerous features in temporal and frequency domain extracted from the 9 s episode immediately prior to the first defibrillation shock. Based on the shock outcome, each ECG file has been annotated by three expert cardiologists, - using majority decision -, as successful (56 cases), unsuccessful (195 cases), or indeterminable (9 cases). The code for preprocessing, for feature extraction, and for limiting the investigation to different temporal intervals before the shock is also provided. These data could be reused to design algorithms to predict shock outcome based on ventricular fibrillation analysis, with the goal to optimize the defibrillation strategy (immediate defibrillation versus cardiopulmonary resuscitation and/or drug administration) for enhancing resuscitation. © 2020
T2  - Data in Brief
T1  - ECG waveform dataset for predicting defibrillation outcome in out-of-hospital cardiac arrested patients
VL  - 34
SP  - 106635
DO  - 10.1016/j.dib.2020.106635
ER  - 
@article{
author = "Benini, Sergio and Ivanović, Marija D. and Savardi, Mattia and Kršić, Jelena and Hadžievski, Ljupčo and Baronio, Fabio",
year = "2021",
abstract = "The provided database of 260 ECG signals was collected from patients with out-of-hospital cardiac arrest while treated by the emergency medical services. Each ECG signal contains a 9 second waveform showing ventricular fibrillation, followed by 1 min of post-shock waveform. Patients’ ECGs are made available in multiple formats. All ECGs recorded during the prehospital treatment are provided in PFD files, after being anonymized, printed in paper, and scanned. For each ECG, the dataset also includes the whole digitized waveform (9 s pre- and 1 min post-shock each) and numerous features in temporal and frequency domain extracted from the 9 s episode immediately prior to the first defibrillation shock. Based on the shock outcome, each ECG file has been annotated by three expert cardiologists, - using majority decision -, as successful (56 cases), unsuccessful (195 cases), or indeterminable (9 cases). The code for preprocessing, for feature extraction, and for limiting the investigation to different temporal intervals before the shock is also provided. These data could be reused to design algorithms to predict shock outcome based on ventricular fibrillation analysis, with the goal to optimize the defibrillation strategy (immediate defibrillation versus cardiopulmonary resuscitation and/or drug administration) for enhancing resuscitation. © 2020",
journal = "Data in Brief",
title = "ECG waveform dataset for predicting defibrillation outcome in out-of-hospital cardiac arrested patients",
volume = "34",
pages = "106635",
doi = "10.1016/j.dib.2020.106635"
}
Benini, S., Ivanović, M. D., Savardi, M., Kršić, J., Hadžievski, L.,& Baronio, F.. (2021). ECG waveform dataset for predicting defibrillation outcome in out-of-hospital cardiac arrested patients. in Data in Brief, 34, 106635.
https://doi.org/10.1016/j.dib.2020.106635
Benini S, Ivanović MD, Savardi M, Kršić J, Hadžievski L, Baronio F. ECG waveform dataset for predicting defibrillation outcome in out-of-hospital cardiac arrested patients. in Data in Brief. 2021;34:106635.
doi:10.1016/j.dib.2020.106635 .
Benini, Sergio, Ivanović, Marija D., Savardi, Mattia, Kršić, Jelena, Hadžievski, Ljupčo, Baronio, Fabio, "ECG waveform dataset for predicting defibrillation outcome in out-of-hospital cardiac arrested patients" in Data in Brief, 34 (2021):106635,
https://doi.org/10.1016/j.dib.2020.106635 . .
1
1
1
1

Predicting defibrillation success in out-of-hospital cardiac arrested patients: Moving beyond feature design

Ivanović, Marija D.; Hannink, Julius; Ring, Matthias; Baronio, Fabio; Vukčević, Vladan; Hadžievski, Ljupčo; Eskofier, Bjoern

(2020)

TY  - JOUR
AU  - Ivanović, Marija D.
AU  - Hannink, Julius
AU  - Ring, Matthias
AU  - Baronio, Fabio
AU  - Vukčević, Vladan
AU  - Hadžievski, Ljupčo
AU  - Eskofier, Bjoern
PY  - 2020
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9678
AB  - Optimizing timing of defibrillation by evaluating the likelihood of a successful outcome could significantly enhance resuscitation. Previous studies employed conventional machine learning approaches and hand-crafted features to address this issue, but none have achieved superior performance to be widely accepted. This study proposes a novel approach in which predictive features are automatically learned.MethodsA raw 4s VF episode immediately prior to first defibrillation shock was feed to a 3-stage CNN feature extractor. Each stage was composed of 4 components: convolution, rectified linear unit activation, dropout and max-pooling. At the end of feature extractor, the feature map was flattened and connected to a fully connected multi-layer perceptron for classification. For model evaluation, a 10 fold cross-validation was employed. To balance classes, SMOTE oversampling method has been applied to minority class.ResultsThe obtained results show that the proposed model is highly accurate in predicting defibrillation outcome (Acc = 93.6 %). Since recommendations on classifiers suggest at least 50 % specificity and 95 % sensitivity as safe and useful predictors for defibrillation decision, the reported sensitivity of 98.8 % and specificity of 88.2 %, with the analysis speed of 3 ms/input signal, indicate that the proposed model possesses a good prospective to be implemented in automated external defibrillators.ConclusionsThe learned features demonstrate superiority over hand-crafted ones when performed on the same dataset. This approach benefits from being fully automatic by fusing feature extraction, selection and classification into a single learning model. It provides a superior strategy that can be used as a tool to guide treatment of OHCA patients in bringing optimal decision of precedence treatment. Furthermore, for encouraging replicability, the dataset has been made publicly available to the research community.
T2  - Artificial Intelligence in Medicine
T1  - Predicting defibrillation success in out-of-hospital cardiac arrested patients: Moving beyond feature design
VL  - 110
SP  - 101963
DO  - 10.1016/j.artmed.2020.101963
ER  - 
@article{
author = "Ivanović, Marija D. and Hannink, Julius and Ring, Matthias and Baronio, Fabio and Vukčević, Vladan and Hadžievski, Ljupčo and Eskofier, Bjoern",
year = "2020",
abstract = "Optimizing timing of defibrillation by evaluating the likelihood of a successful outcome could significantly enhance resuscitation. Previous studies employed conventional machine learning approaches and hand-crafted features to address this issue, but none have achieved superior performance to be widely accepted. This study proposes a novel approach in which predictive features are automatically learned.MethodsA raw 4s VF episode immediately prior to first defibrillation shock was feed to a 3-stage CNN feature extractor. Each stage was composed of 4 components: convolution, rectified linear unit activation, dropout and max-pooling. At the end of feature extractor, the feature map was flattened and connected to a fully connected multi-layer perceptron for classification. For model evaluation, a 10 fold cross-validation was employed. To balance classes, SMOTE oversampling method has been applied to minority class.ResultsThe obtained results show that the proposed model is highly accurate in predicting defibrillation outcome (Acc = 93.6 %). Since recommendations on classifiers suggest at least 50 % specificity and 95 % sensitivity as safe and useful predictors for defibrillation decision, the reported sensitivity of 98.8 % and specificity of 88.2 %, with the analysis speed of 3 ms/input signal, indicate that the proposed model possesses a good prospective to be implemented in automated external defibrillators.ConclusionsThe learned features demonstrate superiority over hand-crafted ones when performed on the same dataset. This approach benefits from being fully automatic by fusing feature extraction, selection and classification into a single learning model. It provides a superior strategy that can be used as a tool to guide treatment of OHCA patients in bringing optimal decision of precedence treatment. Furthermore, for encouraging replicability, the dataset has been made publicly available to the research community.",
journal = "Artificial Intelligence in Medicine",
title = "Predicting defibrillation success in out-of-hospital cardiac arrested patients: Moving beyond feature design",
volume = "110",
pages = "101963",
doi = "10.1016/j.artmed.2020.101963"
}
Ivanović, M. D., Hannink, J., Ring, M., Baronio, F., Vukčević, V., Hadžievski, L.,& Eskofier, B.. (2020). Predicting defibrillation success in out-of-hospital cardiac arrested patients: Moving beyond feature design. in Artificial Intelligence in Medicine, 110, 101963.
https://doi.org/10.1016/j.artmed.2020.101963
Ivanović MD, Hannink J, Ring M, Baronio F, Vukčević V, Hadžievski L, Eskofier B. Predicting defibrillation success in out-of-hospital cardiac arrested patients: Moving beyond feature design. in Artificial Intelligence in Medicine. 2020;110:101963.
doi:10.1016/j.artmed.2020.101963 .
Ivanović, Marija D., Hannink, Julius, Ring, Matthias, Baronio, Fabio, Vukčević, Vladan, Hadžievski, Ljupčo, Eskofier, Bjoern, "Predicting defibrillation success in out-of-hospital cardiac arrested patients: Moving beyond feature design" in Artificial Intelligence in Medicine, 110 (2020):101963,
https://doi.org/10.1016/j.artmed.2020.101963 . .
2

Cardially - ECG waveform dataset for predicting defibrillation outcome in out-of-hospital cardiac arrested patients

Benini, Sergio; Ivanović, Marija D.; Savardi, Mattia; Kršić, Jelena; Hadžievski, Ljupčo; Baronio, Fabio

(2020)

TY  - DATA
AU  - Benini, Sergio
AU  - Ivanović, Marija D.
AU  - Savardi, Mattia
AU  - Kršić, Jelena
AU  - Hadžievski, Ljupčo
AU  - Baronio, Fabio
PY  - 2020
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9549
AB  - The provided database of 260 ECG signals was collected from patients with out-of-hospital cardiac arrest while treated by the emergency medical services. Each ECG signal contains a 9 second waveform showing ventricular fibrillation, followed by 1 minute of post-shock waveform. Patients’ ECGs are made available in multiple formats. All ECGs recorded during the prehospital treatment are provided in PFD files, after being anonymized, printed in paper, and scanned. For each ECG, the dataset also includes the whole digitized waveform (9 s pre- and 1 min post-shock each) and numerous features in temporal and frequency domain extracted from the 9 s episode immediately prior to the first defibrillation shock. Based on the shock outcome, each ECG file has been annotated by three expert cardiologists, - using majority decision -, as successful (56 cases), unsuccessful (195 cases), or indeterminable (9 cases). The code for preprocessing, for feature extraction, and for limiting the investigation to different temporal intervals before the shock is also provided. These data could be reused to design algorithms to predict shock outcome based on ventricular fibrillation analysis, with the goal to optimize the defibrillation strategy (immediate defibrillation versus cardiopulmonary resuscitation and/or drug administration) for enhancing resuscitation.
T2  - Mendeley Data
T1  - Cardially - ECG waveform dataset for predicting defibrillation outcome in out-of-hospital cardiac arrested patients
DO  - 10.17632/wpr5nzyn2z.1
ER  - 
@misc{
author = "Benini, Sergio and Ivanović, Marija D. and Savardi, Mattia and Kršić, Jelena and Hadžievski, Ljupčo and Baronio, Fabio",
year = "2020",
abstract = "The provided database of 260 ECG signals was collected from patients with out-of-hospital cardiac arrest while treated by the emergency medical services. Each ECG signal contains a 9 second waveform showing ventricular fibrillation, followed by 1 minute of post-shock waveform. Patients’ ECGs are made available in multiple formats. All ECGs recorded during the prehospital treatment are provided in PFD files, after being anonymized, printed in paper, and scanned. For each ECG, the dataset also includes the whole digitized waveform (9 s pre- and 1 min post-shock each) and numerous features in temporal and frequency domain extracted from the 9 s episode immediately prior to the first defibrillation shock. Based on the shock outcome, each ECG file has been annotated by three expert cardiologists, - using majority decision -, as successful (56 cases), unsuccessful (195 cases), or indeterminable (9 cases). The code for preprocessing, for feature extraction, and for limiting the investigation to different temporal intervals before the shock is also provided. These data could be reused to design algorithms to predict shock outcome based on ventricular fibrillation analysis, with the goal to optimize the defibrillation strategy (immediate defibrillation versus cardiopulmonary resuscitation and/or drug administration) for enhancing resuscitation.",
journal = "Mendeley Data",
title = "Cardially - ECG waveform dataset for predicting defibrillation outcome in out-of-hospital cardiac arrested patients",
doi = "10.17632/wpr5nzyn2z.1"
}
Benini, S., Ivanović, M. D., Savardi, M., Kršić, J., Hadžievski, L.,& Baronio, F.. (2020). Cardially - ECG waveform dataset for predicting defibrillation outcome in out-of-hospital cardiac arrested patients. in Mendeley Data.
https://doi.org/10.17632/wpr5nzyn2z.1
Benini S, Ivanović MD, Savardi M, Kršić J, Hadžievski L, Baronio F. Cardially - ECG waveform dataset for predicting defibrillation outcome in out-of-hospital cardiac arrested patients. in Mendeley Data. 2020;.
doi:10.17632/wpr5nzyn2z.1 .
Benini, Sergio, Ivanović, Marija D., Savardi, Mattia, Kršić, Jelena, Hadžievski, Ljupčo, Baronio, Fabio, "Cardially - ECG waveform dataset for predicting defibrillation outcome in out-of-hospital cardiac arrested patients" in Mendeley Data (2020),
https://doi.org/10.17632/wpr5nzyn2z.1 . .

Properties of different types of dry electrodes for wearable smart monitoring devices

Popović Maneski, Lana; Ivanović, Marija D.; Atanasoski, Vladimir; Miletić, Marjan; Zdolšek, Sanja; Bojović, Boško P.; Hadžievski, Ljupčo

(2020)

TY  - JOUR
AU  - Popović Maneski, Lana
AU  - Ivanović, Marija D.
AU  - Atanasoski, Vladimir
AU  - Miletić, Marjan
AU  - Zdolšek, Sanja
AU  - Bojović, Boško P.
AU  - Hadžievski, Ljupčo
PY  - 2020
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8940
AB  - Wearable smart monitors (WSMs) applied for the estimation of electrophysiological signals are of utmost interest for a non-stressed life. WSM which records heart muscle activities could signalize timely a life-threatening event. The heart muscle activities are typically recorded across the heart at the surface of the body; hence, a WSM monitor requires high-quality surface electrodes. The electrodes used in the clinical settings [i.e. silver/silver chloride (Ag/AgCl) with the gel] are not practical for the daily out of clinic usage. A practical WSM requires the application of a dry electrode with stable and reproducible electrical characteristics. We compared the characteristics of six types of dry electrodes and one gelled electrode during short-term recordings sessions (≈30 s) in real-life conditions: Orbital, monolithic polymer plated with Ag/AgCl, and five rectangular shaped 10 × 6 × 2 mm electrodes (Orbital, Ag electrode, Ag/AgCl electrode, gold electrode and stainless-steel AISI304). The results of a well-controlled analysis which considered motion artifacts, line noise and junction potentials suggest that among the dry electrodes Ag/AgCl performs the best. The Ag/AgCl electrode is in average three times better compared with the stainless-steel electrode often used in WSMs.
T2  - Biomedical Engineering / Biomedizinische Technik
T1  - Properties of different types of dry electrodes for wearable smart monitoring devices
VL  - 65
IS  - 4
SP  - 405
EP  - 415
DO  - 10.1515/bmt-2019-0167
ER  - 
@article{
author = "Popović Maneski, Lana and Ivanović, Marija D. and Atanasoski, Vladimir and Miletić, Marjan and Zdolšek, Sanja and Bojović, Boško P. and Hadžievski, Ljupčo",
year = "2020",
abstract = "Wearable smart monitors (WSMs) applied for the estimation of electrophysiological signals are of utmost interest for a non-stressed life. WSM which records heart muscle activities could signalize timely a life-threatening event. The heart muscle activities are typically recorded across the heart at the surface of the body; hence, a WSM monitor requires high-quality surface electrodes. The electrodes used in the clinical settings [i.e. silver/silver chloride (Ag/AgCl) with the gel] are not practical for the daily out of clinic usage. A practical WSM requires the application of a dry electrode with stable and reproducible electrical characteristics. We compared the characteristics of six types of dry electrodes and one gelled electrode during short-term recordings sessions (≈30 s) in real-life conditions: Orbital, monolithic polymer plated with Ag/AgCl, and five rectangular shaped 10 × 6 × 2 mm electrodes (Orbital, Ag electrode, Ag/AgCl electrode, gold electrode and stainless-steel AISI304). The results of a well-controlled analysis which considered motion artifacts, line noise and junction potentials suggest that among the dry electrodes Ag/AgCl performs the best. The Ag/AgCl electrode is in average three times better compared with the stainless-steel electrode often used in WSMs.",
journal = "Biomedical Engineering / Biomedizinische Technik",
title = "Properties of different types of dry electrodes for wearable smart monitoring devices",
volume = "65",
number = "4",
pages = "405-415",
doi = "10.1515/bmt-2019-0167"
}
Popović Maneski, L., Ivanović, M. D., Atanasoski, V., Miletić, M., Zdolšek, S., Bojović, B. P.,& Hadžievski, L.. (2020). Properties of different types of dry electrodes for wearable smart monitoring devices. in Biomedical Engineering / Biomedizinische Technik, 65(4), 405-415.
https://doi.org/10.1515/bmt-2019-0167
Popović Maneski L, Ivanović MD, Atanasoski V, Miletić M, Zdolšek S, Bojović BP, Hadžievski L. Properties of different types of dry electrodes for wearable smart monitoring devices. in Biomedical Engineering / Biomedizinische Technik. 2020;65(4):405-415.
doi:10.1515/bmt-2019-0167 .
Popović Maneski, Lana, Ivanović, Marija D., Atanasoski, Vladimir, Miletić, Marjan, Zdolšek, Sanja, Bojović, Boško P., Hadžievski, Ljupčo, "Properties of different types of dry electrodes for wearable smart monitoring devices" in Biomedical Engineering / Biomedizinische Technik, 65, no. 4 (2020):405-415,
https://doi.org/10.1515/bmt-2019-0167 . .

Deep learning-based classification of high intensity light patterns in photorefractive crystals

Ivanović, Marija D.; Mančić, Ana; Hermann-Avigliano, Carla; Hadžievski, Ljupčo; Maluckov, Aleksandra

(2020)

TY  - JOUR
AU  - Ivanović, Marija D.
AU  - Mančić, Ana
AU  - Hermann-Avigliano, Carla
AU  - Hadžievski, Ljupčo
AU  - Maluckov, Aleksandra
PY  - 2020
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8837
AB  - In this paper, we establish a new scheme for identification and classification of high intensity events generated by the propagation of light through a photorefractive SBN crystal. Among these events, which are the inevitable consequence of the development of modulation instability, are speckling and soliton-like patterns. The usual classifiers, developed on statistical measures, such as the significant intensity, often provide only a partial characterization of these events. Here, we try to overcome this deficiency by implementing the convolution neural network method to relate experimental data of light intensity distribution and corresponding numerical outputs with different high intensity regimes. The train and test sets are formed of experimentally obtained intensity profiles at the crystal output facet and corresponding numerical profiles. The accuracy of detection of speckles reaches maximum value of 100%, while the accuracy of solitons and caustic detection is above 97%. These performances are promising for the creation of neural network based routines for prediction of extreme events in wave media. © 2020 IOP Publishing Ltd.
T2  - Journal of Optics
T1  - Deep learning-based classification of high intensity light patterns in photorefractive crystals
VL  - 22
IS  - 3
SP  - 035504
DO  - 10.1088/2040-8986/ab70f0
ER  - 
@article{
author = "Ivanović, Marija D. and Mančić, Ana and Hermann-Avigliano, Carla and Hadžievski, Ljupčo and Maluckov, Aleksandra",
year = "2020",
abstract = "In this paper, we establish a new scheme for identification and classification of high intensity events generated by the propagation of light through a photorefractive SBN crystal. Among these events, which are the inevitable consequence of the development of modulation instability, are speckling and soliton-like patterns. The usual classifiers, developed on statistical measures, such as the significant intensity, often provide only a partial characterization of these events. Here, we try to overcome this deficiency by implementing the convolution neural network method to relate experimental data of light intensity distribution and corresponding numerical outputs with different high intensity regimes. The train and test sets are formed of experimentally obtained intensity profiles at the crystal output facet and corresponding numerical profiles. The accuracy of detection of speckles reaches maximum value of 100%, while the accuracy of solitons and caustic detection is above 97%. These performances are promising for the creation of neural network based routines for prediction of extreme events in wave media. © 2020 IOP Publishing Ltd.",
journal = "Journal of Optics",
title = "Deep learning-based classification of high intensity light patterns in photorefractive crystals",
volume = "22",
number = "3",
pages = "035504",
doi = "10.1088/2040-8986/ab70f0"
}
Ivanović, M. D., Mančić, A., Hermann-Avigliano, C., Hadžievski, L.,& Maluckov, A.. (2020). Deep learning-based classification of high intensity light patterns in photorefractive crystals. in Journal of Optics, 22(3), 035504.
https://doi.org/10.1088/2040-8986/ab70f0
Ivanović MD, Mančić A, Hermann-Avigliano C, Hadžievski L, Maluckov A. Deep learning-based classification of high intensity light patterns in photorefractive crystals. in Journal of Optics. 2020;22(3):035504.
doi:10.1088/2040-8986/ab70f0 .
Ivanović, Marija D., Mančić, Ana, Hermann-Avigliano, Carla, Hadžievski, Ljupčo, Maluckov, Aleksandra, "Deep learning-based classification of high intensity light patterns in photorefractive crystals" in Journal of Optics, 22, no. 3 (2020):035504,
https://doi.org/10.1088/2040-8986/ab70f0 . .
2

Deep Learning Approach for Highly Specific Atrial Fibrillation and Flutter Detection based on RR Intervals

Ivanović, Marija D.; Atanasoski, Vladimir; Shvilkin, Alexei; Hadžievski, Ljupčo; Maluckov, Aleksandra

(IEEE, 2019)

TY  - CONF
AU  - Ivanović, Marija D.
AU  - Atanasoski, Vladimir
AU  - Shvilkin, Alexei
AU  - Hadžievski, Ljupčo
AU  - Maluckov, Aleksandra
PY  - 2019
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8805
AB  - Atrial fibrillation (AF) and atrial flutter (AFL) represent atrial arrhythmias closely related to increasing risk for embolic stroke, and therefore being in the focus of cardiologists. While the reported methods for AF detection exhibit high performances, little attention has been given to distinguishing these two arrhythmias. In this study, we propose a deep neural network architecture, which combines convolutional and recurrent neural networks, for extracting features from sequence of RR intervals. The learned features were used to classify a long term ECG signals as AF, AFL or sinus rhythm (SR). A 10-fold cross-validation strategy was used for choosing an architecture design and tuning model hyperparameters. Accuracy of 88.28 %, with the sensitivities of 93.83%, 83.60% and 83.83% for SR, AF and AFL, respectively, was achieved. After choosing optimal network structure, the model was trained on the entire training set and finally evaluated on the blindfold test set which resulted in 89.67% accuracy, and 97.20%, 94.20%, and 77.78% sensitivity for SR, AF and AFL, respectively. Promising performances of the proposed model encourage continuing development of highly specific AF and AFL detection procedure based on deep learning. Distinction between these two arrhythmias can make therapy more efficient and decrease the recovery time to normal heart rhythm. © 2019 IEEE.
PB  - IEEE
C3  - Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC) (41; 2019; Berlin)
T1  - Deep Learning Approach for Highly Specific Atrial Fibrillation and Flutter Detection based on RR Intervals
SP  - 1780
EP  - 1783
DO  - 10.1109/EMBC.2019.8856806
ER  - 
@conference{
author = "Ivanović, Marija D. and Atanasoski, Vladimir and Shvilkin, Alexei and Hadžievski, Ljupčo and Maluckov, Aleksandra",
year = "2019",
abstract = "Atrial fibrillation (AF) and atrial flutter (AFL) represent atrial arrhythmias closely related to increasing risk for embolic stroke, and therefore being in the focus of cardiologists. While the reported methods for AF detection exhibit high performances, little attention has been given to distinguishing these two arrhythmias. In this study, we propose a deep neural network architecture, which combines convolutional and recurrent neural networks, for extracting features from sequence of RR intervals. The learned features were used to classify a long term ECG signals as AF, AFL or sinus rhythm (SR). A 10-fold cross-validation strategy was used for choosing an architecture design and tuning model hyperparameters. Accuracy of 88.28 %, with the sensitivities of 93.83%, 83.60% and 83.83% for SR, AF and AFL, respectively, was achieved. After choosing optimal network structure, the model was trained on the entire training set and finally evaluated on the blindfold test set which resulted in 89.67% accuracy, and 97.20%, 94.20%, and 77.78% sensitivity for SR, AF and AFL, respectively. Promising performances of the proposed model encourage continuing development of highly specific AF and AFL detection procedure based on deep learning. Distinction between these two arrhythmias can make therapy more efficient and decrease the recovery time to normal heart rhythm. © 2019 IEEE.",
publisher = "IEEE",
journal = "Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC) (41; 2019; Berlin)",
title = "Deep Learning Approach for Highly Specific Atrial Fibrillation and Flutter Detection based on RR Intervals",
pages = "1780-1783",
doi = "10.1109/EMBC.2019.8856806"
}
Ivanović, M. D., Atanasoski, V., Shvilkin, A., Hadžievski, L.,& Maluckov, A.. (2019). Deep Learning Approach for Highly Specific Atrial Fibrillation and Flutter Detection based on RR Intervals. in Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC) (41; 2019; Berlin)
IEEE., 1780-1783.
https://doi.org/10.1109/EMBC.2019.8856806
Ivanović MD, Atanasoski V, Shvilkin A, Hadžievski L, Maluckov A. Deep Learning Approach for Highly Specific Atrial Fibrillation and Flutter Detection based on RR Intervals. in Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC) (41; 2019; Berlin). 2019;:1780-1783.
doi:10.1109/EMBC.2019.8856806 .
Ivanović, Marija D., Atanasoski, Vladimir, Shvilkin, Alexei, Hadžievski, Ljupčo, Maluckov, Aleksandra, "Deep Learning Approach for Highly Specific Atrial Fibrillation and Flutter Detection based on RR Intervals" in Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC) (41; 2019; Berlin) (2019):1780-1783,
https://doi.org/10.1109/EMBC.2019.8856806 . .
13
12

ECG derived feature combination versus single feature in predicting defibrillation success in out-of-hospital cardiac arrested patients

Ivanović, Marija D.; Ring, Matthias; Baronio, Fabio; Calza, Stefano; Vukčević, Vladan ; Hadžievski, Ljupčo; Maluckov, Aleksandra; Eskofier, Bjoern Michael

(2018)

TY  - JOUR
AU  - Ivanović, Marija D.
AU  - Ring, Matthias
AU  - Baronio, Fabio
AU  - Calza, Stefano
AU  - Vukčević, Vladan 
AU  - Hadžievski, Ljupčo
AU  - Maluckov, Aleksandra
AU  - Eskofier, Bjoern Michael
PY  - 2018
UR  - http://stacks.iop.org/2057-1976/5/i=1/a=015012?key=crossref.179380a6d1fbac3633b726787a95feb5
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/8095
AB  - Objective: Algorithms to predict shock outcome based on ventricular fibrillation (VF) waveform features are potentially useful tool to optimize defibrillation strategy (immediate defibrillation versus cardiopulmonary resuscitation). Researchers have investigated numerous predictive features and classification methods using single VF feature and/or their combinations, however reported predictabilities are not consistent. The purpose of this study was to validate whether combining VF features can enhance the prediction accuracy in comparison to single feature. Approach: The analysis was performed in 3 stages: feature extraction, preprocessing and feature selection and classification. Twenty eight predictive features were calculated on 4s episode of the pre-shock VF signal. The preprocessing included instances normalization and oversampling. Seven machine learning algorithms were employed for selecting the best performin single feature and combination of features using wrapper method: Logistic Regression (LR), Naïve-Bayes (NB), Decision tree (C4.5), AdaBoost.M1 (AB), Support Vector Machine (SVM), Nearest Neighbour (NN) and Random Forest (RF). Evaluation of the algorithms was performed by nested 10 fold cross-validation procedure. Main results: A total of 251 unbalanced first shocks (195 unsuccessful and 56 successful) were oversampled to 195 instances in each class. Performance metric based on average accuracy of feature combination has shown that LR and NB exhibit no improvement, C4.5 and AB an improvement not greater than 1% and SVM, NN and RF an improvement greater than 5% in predicting defibrillation outcome in comparison to the best single feature. Significance: By performing wrapper method to select best performing feature combination the non-linear machine learning strategies (SVM, NN, RF) can improve defibrillation prediction performance. © 2018 IOP Publishing Ltd.
T2  - Biomedical Physics & Engineering Express
T1  - ECG derived feature combination versus single feature in predicting defibrillation success in out-of-hospital cardiac arrested patients
VL  - 5
IS  - 1
SP  - 015012
DO  - 10.1088/2057-1976/aaebec
ER  - 
@article{
author = "Ivanović, Marija D. and Ring, Matthias and Baronio, Fabio and Calza, Stefano and Vukčević, Vladan  and Hadžievski, Ljupčo and Maluckov, Aleksandra and Eskofier, Bjoern Michael",
year = "2018",
abstract = "Objective: Algorithms to predict shock outcome based on ventricular fibrillation (VF) waveform features are potentially useful tool to optimize defibrillation strategy (immediate defibrillation versus cardiopulmonary resuscitation). Researchers have investigated numerous predictive features and classification methods using single VF feature and/or their combinations, however reported predictabilities are not consistent. The purpose of this study was to validate whether combining VF features can enhance the prediction accuracy in comparison to single feature. Approach: The analysis was performed in 3 stages: feature extraction, preprocessing and feature selection and classification. Twenty eight predictive features were calculated on 4s episode of the pre-shock VF signal. The preprocessing included instances normalization and oversampling. Seven machine learning algorithms were employed for selecting the best performin single feature and combination of features using wrapper method: Logistic Regression (LR), Naïve-Bayes (NB), Decision tree (C4.5), AdaBoost.M1 (AB), Support Vector Machine (SVM), Nearest Neighbour (NN) and Random Forest (RF). Evaluation of the algorithms was performed by nested 10 fold cross-validation procedure. Main results: A total of 251 unbalanced first shocks (195 unsuccessful and 56 successful) were oversampled to 195 instances in each class. Performance metric based on average accuracy of feature combination has shown that LR and NB exhibit no improvement, C4.5 and AB an improvement not greater than 1% and SVM, NN and RF an improvement greater than 5% in predicting defibrillation outcome in comparison to the best single feature. Significance: By performing wrapper method to select best performing feature combination the non-linear machine learning strategies (SVM, NN, RF) can improve defibrillation prediction performance. © 2018 IOP Publishing Ltd.",
journal = "Biomedical Physics & Engineering Express",
title = "ECG derived feature combination versus single feature in predicting defibrillation success in out-of-hospital cardiac arrested patients",
volume = "5",
number = "1",
pages = "015012",
doi = "10.1088/2057-1976/aaebec"
}
Ivanović, M. D., Ring, M., Baronio, F., Calza, S., Vukčević, V., Hadžievski, L., Maluckov, A.,& Eskofier, B. M.. (2018). ECG derived feature combination versus single feature in predicting defibrillation success in out-of-hospital cardiac arrested patients. in Biomedical Physics & Engineering Express, 5(1), 015012.
https://doi.org/10.1088/2057-1976/aaebec
Ivanović MD, Ring M, Baronio F, Calza S, Vukčević V, Hadžievski L, Maluckov A, Eskofier BM. ECG derived feature combination versus single feature in predicting defibrillation success in out-of-hospital cardiac arrested patients. in Biomedical Physics & Engineering Express. 2018;5(1):015012.
doi:10.1088/2057-1976/aaebec .
Ivanović, Marija D., Ring, Matthias, Baronio, Fabio, Calza, Stefano, Vukčević, Vladan , Hadžievski, Ljupčo, Maluckov, Aleksandra, Eskofier, Bjoern Michael, "ECG derived feature combination versus single feature in predicting defibrillation success in out-of-hospital cardiac arrested patients" in Biomedical Physics & Engineering Express, 5, no. 1 (2018):015012,
https://doi.org/10.1088/2057-1976/aaebec . .
1
4
4
4

Real-time chest-wall-motion tracking by a single optical fibre grating: a prospective method for ventilator triggering

Ivanović, Marija D.; Petrović, Jovana S.; Savić, Andrej; Gligorić, Goran; Miletić, Marjan; Vukčević, Miodrag; Bojović, Boško P.; Hadžievski, Ljupčo; Allsop, Thomas P.; Webb, David J.

(2018)

TY  - JOUR
AU  - Ivanović, Marija D.
AU  - Petrović, Jovana S.
AU  - Savić, Andrej
AU  - Gligorić, Goran
AU  - Miletić, Marjan
AU  - Vukčević, Miodrag
AU  - Bojović, Boško P.
AU  - Hadžievski, Ljupčo
AU  - Allsop, Thomas P.
AU  - Webb, David J.
PY  - 2018
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/7637
AB  - Objective: The ventilators involved in non-invasive mechanical ventilation commonly provide ventilator support via a facemask. The interface of the mask with a patient promotes air leaks that cause errors in the feedback information provided by a pneumatic sensor and hence patient-ventilator asynchrony with multiple negative consequences. Our objective is to test the possibility of using chest-wall motion measured by an optical fibre-grating sensor as a more accurate non-invasive ventilator triggering mechanism. Approach: The basic premise of our approach is that the measurement accuracy can be improved by using a triggering signal that precedes pneumatic triggering in the neuro-ventilatory coupling sequence. We propose a technique that uses the measurement of chest-wall curvature by a long-period fibre-grating sensor. The sensor was applied externally to the rib-cage and interrogated in the lateral (edge) filtering scheme. The study was performed on 34 healthy volunteers. Statistical data analysis of the time lag between the fibregrating sensor and the reference pneumotachograph was preceded by the removal of the unwanted heartbeat signal by wavelet transform processing. Main results: The results show a consistent fibregrating signal advance with respect to the standard pneumatic signal by (230 +/- 100) ms in both the inspiratory and expiratory phases. We further show that heart activity removal yields a tremendous improvement in sensor accuracy by reducing it from 60 ml to 0.3 ml. Significance: The results indicate that the proposed measurement technique may lead to a more reliable triggering decision. Its imperviousness to air leaks, non-invasiveness, low-cost and ease of implementation offer good prospects for applications in both clinical and homecare ventilation.
T2  - Physiological Measurement
T1  - Real-time chest-wall-motion tracking by a single optical fibre grating: a prospective method for ventilator triggering
VL  - 39
IS  - 4
SP  - 045009
DO  - 10.1088/1361-6579/aab7ac
ER  - 
@article{
author = "Ivanović, Marija D. and Petrović, Jovana S. and Savić, Andrej and Gligorić, Goran and Miletić, Marjan and Vukčević, Miodrag and Bojović, Boško P. and Hadžievski, Ljupčo and Allsop, Thomas P. and Webb, David J.",
year = "2018",
abstract = "Objective: The ventilators involved in non-invasive mechanical ventilation commonly provide ventilator support via a facemask. The interface of the mask with a patient promotes air leaks that cause errors in the feedback information provided by a pneumatic sensor and hence patient-ventilator asynchrony with multiple negative consequences. Our objective is to test the possibility of using chest-wall motion measured by an optical fibre-grating sensor as a more accurate non-invasive ventilator triggering mechanism. Approach: The basic premise of our approach is that the measurement accuracy can be improved by using a triggering signal that precedes pneumatic triggering in the neuro-ventilatory coupling sequence. We propose a technique that uses the measurement of chest-wall curvature by a long-period fibre-grating sensor. The sensor was applied externally to the rib-cage and interrogated in the lateral (edge) filtering scheme. The study was performed on 34 healthy volunteers. Statistical data analysis of the time lag between the fibregrating sensor and the reference pneumotachograph was preceded by the removal of the unwanted heartbeat signal by wavelet transform processing. Main results: The results show a consistent fibregrating signal advance with respect to the standard pneumatic signal by (230 +/- 100) ms in both the inspiratory and expiratory phases. We further show that heart activity removal yields a tremendous improvement in sensor accuracy by reducing it from 60 ml to 0.3 ml. Significance: The results indicate that the proposed measurement technique may lead to a more reliable triggering decision. Its imperviousness to air leaks, non-invasiveness, low-cost and ease of implementation offer good prospects for applications in both clinical and homecare ventilation.",
journal = "Physiological Measurement",
title = "Real-time chest-wall-motion tracking by a single optical fibre grating: a prospective method for ventilator triggering",
volume = "39",
number = "4",
pages = "045009",
doi = "10.1088/1361-6579/aab7ac"
}
Ivanović, M. D., Petrović, J. S., Savić, A., Gligorić, G., Miletić, M., Vukčević, M., Bojović, B. P., Hadžievski, L., Allsop, T. P.,& Webb, D. J.. (2018). Real-time chest-wall-motion tracking by a single optical fibre grating: a prospective method for ventilator triggering. in Physiological Measurement, 39(4), 045009.
https://doi.org/10.1088/1361-6579/aab7ac
Ivanović MD, Petrović JS, Savić A, Gligorić G, Miletić M, Vukčević M, Bojović BP, Hadžievski L, Allsop TP, Webb DJ. Real-time chest-wall-motion tracking by a single optical fibre grating: a prospective method for ventilator triggering. in Physiological Measurement. 2018;39(4):045009.
doi:10.1088/1361-6579/aab7ac .
Ivanović, Marija D., Petrović, Jovana S., Savić, Andrej, Gligorić, Goran, Miletić, Marjan, Vukčević, Miodrag, Bojović, Boško P., Hadžievski, Ljupčo, Allsop, Thomas P., Webb, David J., "Real-time chest-wall-motion tracking by a single optical fibre grating: a prospective method for ventilator triggering" in Physiological Measurement, 39, no. 4 (2018):045009,
https://doi.org/10.1088/1361-6579/aab7ac . .

Statistics of vector Manakov rogue waves

Mančić, Ana; Baronio, Fabio; Hadžievski, Ljupčo; Wabnitz, Stefan; Maluckov, Aleksandra

(2018)

TY  - JOUR
AU  - Mančić, Ana
AU  - Baronio, Fabio
AU  - Hadžievski, Ljupčo
AU  - Wabnitz, Stefan
AU  - Maluckov, Aleksandra
PY  - 2018
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/7798
UR  - https://arxiv.org/pdf/1807.01941.pdf
AB  - We present a statistical analysis based on the height and return-time probabilities of high-amplitude wave events in both focusing and defocusing Manakov systems. We find that analytical rational or semirational solutions, associated with extreme, rogue wave (RW) structures, are the leading high-amplitude events in this system. We define the thresholds for classifying an extreme wave event as a RW. Our results indicate that there is a strong relationship between the type of RW and the mechanism which is responsible for its creation. Initially, high-amplitude events originate from modulation instability. Upon subsequent evolution, the interaction among these events prevails as the mechanism for RW creation. We suggest a strategy for confirming the basic properties of different extreme events. This involves the definition of proper statistical measures at each stage of the RW dynamics. Our results point to the need for redefining criteria for identifying RW events.
T2  - Physical Review E
T1  - Statistics of vector Manakov rogue waves
VL  - 98
IS  - 1
SP  - 012209
DO  - 10.1103/PhysRevE.98.012209
ER  - 
@article{
author = "Mančić, Ana and Baronio, Fabio and Hadžievski, Ljupčo and Wabnitz, Stefan and Maluckov, Aleksandra",
year = "2018",
abstract = "We present a statistical analysis based on the height and return-time probabilities of high-amplitude wave events in both focusing and defocusing Manakov systems. We find that analytical rational or semirational solutions, associated with extreme, rogue wave (RW) structures, are the leading high-amplitude events in this system. We define the thresholds for classifying an extreme wave event as a RW. Our results indicate that there is a strong relationship between the type of RW and the mechanism which is responsible for its creation. Initially, high-amplitude events originate from modulation instability. Upon subsequent evolution, the interaction among these events prevails as the mechanism for RW creation. We suggest a strategy for confirming the basic properties of different extreme events. This involves the definition of proper statistical measures at each stage of the RW dynamics. Our results point to the need for redefining criteria for identifying RW events.",
journal = "Physical Review E",
title = "Statistics of vector Manakov rogue waves",
volume = "98",
number = "1",
pages = "012209",
doi = "10.1103/PhysRevE.98.012209"
}
Mančić, A., Baronio, F., Hadžievski, L., Wabnitz, S.,& Maluckov, A.. (2018). Statistics of vector Manakov rogue waves. in Physical Review E, 98(1), 012209.
https://doi.org/10.1103/PhysRevE.98.012209
Mančić A, Baronio F, Hadžievski L, Wabnitz S, Maluckov A. Statistics of vector Manakov rogue waves. in Physical Review E. 2018;98(1):012209.
doi:10.1103/PhysRevE.98.012209 .
Mančić, Ana, Baronio, Fabio, Hadžievski, Ljupčo, Wabnitz, Stefan, Maluckov, Aleksandra, "Statistics of vector Manakov rogue waves" in Physical Review E, 98, no. 1 (2018):012209,
https://doi.org/10.1103/PhysRevE.98.012209 . .
1
2
2
2

Statistics of vector Manakov rogue waves

Mančić, Ana; Baronio, Fabio; Hadžievski, Ljupčo; Wabnitz, Stefan; Maluckov, Aleksandra

(2018)

TY  - JOUR
AU  - Mančić, Ana
AU  - Baronio, Fabio
AU  - Hadžievski, Ljupčo
AU  - Wabnitz, Stefan
AU  - Maluckov, Aleksandra
PY  - 2018
UR  - https://link.aps.org/doi/10.1103/PhysRevE.98.012209
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/7797
AB  - We present a statistical analysis based on the height and return-time probabilities of high-amplitude wave events in both focusing and defocusing Manakov systems. We find that analytical rational or semirational solutions, associated with extreme, rogue wave (RW) structures, are the leading high-amplitude events in this system. We define the thresholds for classifying an extreme wave event as a RW. Our results indicate that there is a strong relationship between the type of RW and the mechanism which is responsible for its creation. Initially, high-amplitude events originate from modulation instability. Upon subsequent evolution, the interaction among these events prevails as the mechanism for RW creation. We suggest a strategy for confirming the basic properties of different extreme events. This involves the definition of proper statistical measures at each stage of the RW dynamics. Our results point to the need for redefining criteria for identifying RW events.
T2  - Physical Review E
T1  - Statistics of vector Manakov rogue waves
VL  - 98
IS  - 1
SP  - 012209
DO  - 10.1103/PhysRevE.98.012209
ER  - 
@article{
author = "Mančić, Ana and Baronio, Fabio and Hadžievski, Ljupčo and Wabnitz, Stefan and Maluckov, Aleksandra",
year = "2018",
abstract = "We present a statistical analysis based on the height and return-time probabilities of high-amplitude wave events in both focusing and defocusing Manakov systems. We find that analytical rational or semirational solutions, associated with extreme, rogue wave (RW) structures, are the leading high-amplitude events in this system. We define the thresholds for classifying an extreme wave event as a RW. Our results indicate that there is a strong relationship between the type of RW and the mechanism which is responsible for its creation. Initially, high-amplitude events originate from modulation instability. Upon subsequent evolution, the interaction among these events prevails as the mechanism for RW creation. We suggest a strategy for confirming the basic properties of different extreme events. This involves the definition of proper statistical measures at each stage of the RW dynamics. Our results point to the need for redefining criteria for identifying RW events.",
journal = "Physical Review E",
title = "Statistics of vector Manakov rogue waves",
volume = "98",
number = "1",
pages = "012209",
doi = "10.1103/PhysRevE.98.012209"
}
Mančić, A., Baronio, F., Hadžievski, L., Wabnitz, S.,& Maluckov, A.. (2018). Statistics of vector Manakov rogue waves. in Physical Review E, 98(1), 012209.
https://doi.org/10.1103/PhysRevE.98.012209
Mančić A, Baronio F, Hadžievski L, Wabnitz S, Maluckov A. Statistics of vector Manakov rogue waves. in Physical Review E. 2018;98(1):012209.
doi:10.1103/PhysRevE.98.012209 .
Mančić, Ana, Baronio, Fabio, Hadžievski, Ljupčo, Wabnitz, Stefan, Maluckov, Aleksandra, "Statistics of vector Manakov rogue waves" in Physical Review E, 98, no. 1 (2018):012209,
https://doi.org/10.1103/PhysRevE.98.012209 . .
1
2
2
2

Terahertz chiral metamaterial based on twisted closed ring resonators`

Stojanović, Danka; Beličev, Petra; Gligorić, Goran; Hadžievski, Ljupčo

(2018)

TY  - JOUR
AU  - Stojanović, Danka
AU  - Beličev, Petra
AU  - Gligorić, Goran
AU  - Hadžievski, Ljupčo
PY  - 2018
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/1909
AB  - We present a chiral metamaterial (CMM) made of periodically distributed compact elements in a form of twisted closed ring resonators designed to be operational in terahertz (THz) frequency range. We analyze the three observed resonances in the absorption spectra and electric field distribution of linearly polarized incident electromagnetic waves. It has been shown that they arise due to excitation of symmetric and antisymmetric modes and are dependent on the geometry of resonant elements as well as the periodicity of the system. For the case of incident circularly polarized waves, a phenomenon of circular dichroism was observed, and its origin and dependency on the geometrical parameters and metal and dielectric losses was examined. This study indicates that the proposed CMM has a high potential for applications in the design of different THz components.
T2  - Journal of Physics. D: Applied Physics
T1  - Terahertz chiral metamaterial based on twisted closed ring resonators`
VL  - 51
IS  - 4
DO  - 10.1088/1361-6463/aaa06d
ER  - 
@article{
author = "Stojanović, Danka and Beličev, Petra and Gligorić, Goran and Hadžievski, Ljupčo",
year = "2018",
abstract = "We present a chiral metamaterial (CMM) made of periodically distributed compact elements in a form of twisted closed ring resonators designed to be operational in terahertz (THz) frequency range. We analyze the three observed resonances in the absorption spectra and electric field distribution of linearly polarized incident electromagnetic waves. It has been shown that they arise due to excitation of symmetric and antisymmetric modes and are dependent on the geometry of resonant elements as well as the periodicity of the system. For the case of incident circularly polarized waves, a phenomenon of circular dichroism was observed, and its origin and dependency on the geometrical parameters and metal and dielectric losses was examined. This study indicates that the proposed CMM has a high potential for applications in the design of different THz components.",
journal = "Journal of Physics. D: Applied Physics",
title = "Terahertz chiral metamaterial based on twisted closed ring resonators`",
volume = "51",
number = "4",
doi = "10.1088/1361-6463/aaa06d"
}
Stojanović, D., Beličev, P., Gligorić, G.,& Hadžievski, L.. (2018). Terahertz chiral metamaterial based on twisted closed ring resonators`. in Journal of Physics. D: Applied Physics, 51(4).
https://doi.org/10.1088/1361-6463/aaa06d
Stojanović D, Beličev P, Gligorić G, Hadžievski L. Terahertz chiral metamaterial based on twisted closed ring resonators`. in Journal of Physics. D: Applied Physics. 2018;51(4).
doi:10.1088/1361-6463/aaa06d .
Stojanović, Danka, Beličev, Petra, Gligorić, Goran, Hadžievski, Ljupčo, "Terahertz chiral metamaterial based on twisted closed ring resonators`" in Journal of Physics. D: Applied Physics, 51, no. 4 (2018),
https://doi.org/10.1088/1361-6463/aaa06d . .
4
4
4

Models of spin-orbit-coupled oligomers

Gligorić, Goran; Radosavljević, Ana; Petrović, Jovana S.; Maluckov, Aleksandra; Hadžievski, Ljupčo; Malomed, B. A.

(2017)

TY  - JOUR
AU  - Gligorić, Goran
AU  - Radosavljević, Ana
AU  - Petrović, Jovana S.
AU  - Maluckov, Aleksandra
AU  - Hadžievski, Ljupčo
AU  - Malomed, B. A.
PY  - 2017
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/1848
AB  - We address the stability and dynamics of eigenmodes in linearly shaped strings (dimers, trimers, tetramers, and pentamers) built of droplets in a binary Bose-Einstein condensate (BEC). The binary BEC is composed of atoms in two pseudo-spin states with attractive interactions, dressed by properly arranged laser fields, which induce the (pseudo-) spin-orbit (SO) coupling. We demonstrate that the SO-coupling terms help to create eigenmodes of particular types in the strings. Dimer, trimer, and pentamer eigenmodes of the linear system, which correspond to the zero eigenvalue (EV, alias chemical potential) extend into the nonlinear ones, keeping an exact analytical form, while tetramers do not admit such a continuation, because the respective spectrum does not contain a zero EV. Stability areas of these modes shrink with the increasing nonlinearity. Besides these modes, other types of nonlinear states, which are produced by the continuation of their linear counterparts corresponding to some nonzero EVs, are found in a numerical form (including ones for the tetramer system). They are stable in nearly entire existence regions in trimer and pentamer systems, but only in a very small area for the tetramers. Similar results are also obtained, but not displayed in detail, for hexa-and septamers. Published by AIP Publishing.
T2  - Chaos
T1  - Models of spin-orbit-coupled oligomers
VL  - 27
IS  - 11
DO  - 10.1063/1.5000345
ER  - 
@article{
author = "Gligorić, Goran and Radosavljević, Ana and Petrović, Jovana S. and Maluckov, Aleksandra and Hadžievski, Ljupčo and Malomed, B. A.",
year = "2017",
abstract = "We address the stability and dynamics of eigenmodes in linearly shaped strings (dimers, trimers, tetramers, and pentamers) built of droplets in a binary Bose-Einstein condensate (BEC). The binary BEC is composed of atoms in two pseudo-spin states with attractive interactions, dressed by properly arranged laser fields, which induce the (pseudo-) spin-orbit (SO) coupling. We demonstrate that the SO-coupling terms help to create eigenmodes of particular types in the strings. Dimer, trimer, and pentamer eigenmodes of the linear system, which correspond to the zero eigenvalue (EV, alias chemical potential) extend into the nonlinear ones, keeping an exact analytical form, while tetramers do not admit such a continuation, because the respective spectrum does not contain a zero EV. Stability areas of these modes shrink with the increasing nonlinearity. Besides these modes, other types of nonlinear states, which are produced by the continuation of their linear counterparts corresponding to some nonzero EVs, are found in a numerical form (including ones for the tetramer system). They are stable in nearly entire existence regions in trimer and pentamer systems, but only in a very small area for the tetramers. Similar results are also obtained, but not displayed in detail, for hexa-and septamers. Published by AIP Publishing.",
journal = "Chaos",
title = "Models of spin-orbit-coupled oligomers",
volume = "27",
number = "11",
doi = "10.1063/1.5000345"
}
Gligorić, G., Radosavljević, A., Petrović, J. S., Maluckov, A., Hadžievski, L.,& Malomed, B. A.. (2017). Models of spin-orbit-coupled oligomers. in Chaos, 27(11).
https://doi.org/10.1063/1.5000345
Gligorić G, Radosavljević A, Petrović JS, Maluckov A, Hadžievski L, Malomed BA. Models of spin-orbit-coupled oligomers. in Chaos. 2017;27(11).
doi:10.1063/1.5000345 .
Gligorić, Goran, Radosavljević, Ana, Petrović, Jovana S., Maluckov, Aleksandra, Hadžievski, Ljupčo, Malomed, B. A., "Models of spin-orbit-coupled oligomers" in Chaos, 27, no. 11 (2017),
https://doi.org/10.1063/1.5000345 . .
4
3
3

Influence of disorder on generation and probability of extreme events in Salerno lattices

Mančić, Ana; Maluckov, Aleksandra; Hadžievski, Ljupčo

(2017)

TY  - JOUR
AU  - Mančić, Ana
AU  - Maluckov, Aleksandra
AU  - Hadžievski, Ljupčo
PY  - 2017
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/1454
AB  - Extreme events (EEs) in nonlinear and/or disordered one-dimensional photonic lattice systems described by the Salerno model with on-site disorder are studied. The goal is to explain particular properties of these phenomena, essentially related to localization of light in the presence of nonlinear and/or nonlocal couplings in the considered systems. Combining statistical and nonlinear dynamical methods and measures developed in the framework of the theory of localization phenomena in disordered and nonlinear systems, particularities of EEs are qualitatively clarified. Findings presented here indicate that the best environment for EEs creation are disordered near-integrable Salerno lattices. In addition, it is been shown that the leading role in the generation and dynamical properties of EEs in the considered model is played by modulation instability, i.e., by nonlinearities in the system, although EEs can be induced in linear lattices with on-site disorder too.
T2  - Physical Review E
T1  - Influence of disorder on generation and probability of extreme events in Salerno lattices
VL  - 95
IS  - 3
DO  - 10.1103/PhysRevE.95.032212
ER  - 
@article{
author = "Mančić, Ana and Maluckov, Aleksandra and Hadžievski, Ljupčo",
year = "2017",
abstract = "Extreme events (EEs) in nonlinear and/or disordered one-dimensional photonic lattice systems described by the Salerno model with on-site disorder are studied. The goal is to explain particular properties of these phenomena, essentially related to localization of light in the presence of nonlinear and/or nonlocal couplings in the considered systems. Combining statistical and nonlinear dynamical methods and measures developed in the framework of the theory of localization phenomena in disordered and nonlinear systems, particularities of EEs are qualitatively clarified. Findings presented here indicate that the best environment for EEs creation are disordered near-integrable Salerno lattices. In addition, it is been shown that the leading role in the generation and dynamical properties of EEs in the considered model is played by modulation instability, i.e., by nonlinearities in the system, although EEs can be induced in linear lattices with on-site disorder too.",
journal = "Physical Review E",
title = "Influence of disorder on generation and probability of extreme events in Salerno lattices",
volume = "95",
number = "3",
doi = "10.1103/PhysRevE.95.032212"
}
Mančić, A., Maluckov, A.,& Hadžievski, L.. (2017). Influence of disorder on generation and probability of extreme events in Salerno lattices. in Physical Review E, 95(3).
https://doi.org/10.1103/PhysRevE.95.032212
Mančić A, Maluckov A, Hadžievski L. Influence of disorder on generation and probability of extreme events in Salerno lattices. in Physical Review E. 2017;95(3).
doi:10.1103/PhysRevE.95.032212 .
Mančić, Ana, Maluckov, Aleksandra, Hadžievski, Ljupčo, "Influence of disorder on generation and probability of extreme events in Salerno lattices" in Physical Review E, 95, no. 3 (2017),
https://doi.org/10.1103/PhysRevE.95.032212 . .
4
3
4

Control and ultra-short pulse generation in stimulated Raman backscattering

Škorić, Miloš M.; Nikolic, Ljubomir; Hadžievski, Ljupčo; Batani, Dimitri; Ishiguro, Seiji; Mima, Kunioki

(2016)

TY  - CONF
AU  - Škorić, Miloš M.
AU  - Nikolic, Ljubomir
AU  - Hadžievski, Ljupčo
AU  - Batani, Dimitri
AU  - Ishiguro, Seiji
AU  - Mima, Kunioki
PY  - 2016
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/7102
AB  - A stimulated Raman scattering (SRS) is a great concern for laser fusion, causing an energy and symmetry loss and target preheating. In particular, for dominating backward SRS (BRS), a complexity of nonlinear saturation was revealed. Recently, to develop lasers at multi-exawatts and beyond, relevant to high-energy physics, a proposed Raman amplification based on BRS met a restrictive operation window. Here, we stress BRS generics that due to a nonlinear frequency shift (relativistic/trapping effect), it nonlinearly saturates with intermittent pulsations. A break up of Manley-Rowe invariants explains a non-steady saturation. Further, a coherent pulsation BRS regime is proposed for femto-sec pulse generation in a thin exploding foil plasma, with parameter scalings investigated by analytics and particle simulations.
C3  - Journal of Physics: Conference Series
T1  - Control and ultra-short pulse generation in stimulated Raman backscattering
VL  - 688
DO  - 10.1088/1742-6596/688/1/012112
ER  - 
@conference{
author = "Škorić, Miloš M. and Nikolic, Ljubomir and Hadžievski, Ljupčo and Batani, Dimitri and Ishiguro, Seiji and Mima, Kunioki",
year = "2016",
abstract = "A stimulated Raman scattering (SRS) is a great concern for laser fusion, causing an energy and symmetry loss and target preheating. In particular, for dominating backward SRS (BRS), a complexity of nonlinear saturation was revealed. Recently, to develop lasers at multi-exawatts and beyond, relevant to high-energy physics, a proposed Raman amplification based on BRS met a restrictive operation window. Here, we stress BRS generics that due to a nonlinear frequency shift (relativistic/trapping effect), it nonlinearly saturates with intermittent pulsations. A break up of Manley-Rowe invariants explains a non-steady saturation. Further, a coherent pulsation BRS regime is proposed for femto-sec pulse generation in a thin exploding foil plasma, with parameter scalings investigated by analytics and particle simulations.",
journal = "Journal of Physics: Conference Series",
title = "Control and ultra-short pulse generation in stimulated Raman backscattering",
volume = "688",
doi = "10.1088/1742-6596/688/1/012112"
}
Škorić, M. M., Nikolic, L., Hadžievski, L., Batani, D., Ishiguro, S.,& Mima, K.. (2016). Control and ultra-short pulse generation in stimulated Raman backscattering. in Journal of Physics: Conference Series, 688.
https://doi.org/10.1088/1742-6596/688/1/012112
Škorić MM, Nikolic L, Hadžievski L, Batani D, Ishiguro S, Mima K. Control and ultra-short pulse generation in stimulated Raman backscattering. in Journal of Physics: Conference Series. 2016;688.
doi:10.1088/1742-6596/688/1/012112 .
Škorić, Miloš M., Nikolic, Ljubomir, Hadžievski, Ljupčo, Batani, Dimitri, Ishiguro, Seiji, Mima, Kunioki, "Control and ultra-short pulse generation in stimulated Raman backscattering" in Journal of Physics: Conference Series, 688 (2016),
https://doi.org/10.1088/1742-6596/688/1/012112 . .
1
1
1

Nonlinear localized flat-band modes with spin-orbit coupling

Gligorić, Goran; Maluckov, Aleksandra; Hadžievski, Ljupčo; Flach, Sergej; Malomed, Boris A.

(2016)

TY  - JOUR
AU  - Gligorić, Goran
AU  - Maluckov, Aleksandra
AU  - Hadžievski, Ljupčo
AU  - Flach, Sergej
AU  - Malomed, Boris A.
PY  - 2016
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/1287
AB  - We report the coexistence and properties of stable compact localized states (CLSs) and discrete solitons (DSs) for nonlinear spinor waves on a flat-band network with spin-orbit coupling (SOC). The system can be implemented by means of a binary Bose-Einstein condensate loaded in the corresponding optical lattice. In the linear limit, the SOC opens a minigap between flat and dispersive bands in the systems band-gap structure, and preserves the existence of CLSs at the flat-band frequency, simultaneously lowering their symmetry. Adding on-site cubic nonlinearity, the CLSs persist and remain available in an exact analytical form, with frequencies that are smoothly tuned into the minigap. Inside of the minigap, the CLS and DS families are stable in narrow areas adjacent to the FB. Deep inside the semi-infinite gap, both the CLSs and DSs are stable too.
T2  - Physical Review B: Condensed Matter and Materials Physics
T1  - Nonlinear localized flat-band modes with spin-orbit coupling
VL  - 94
IS  - 14
SP  - 144302
DO  - 10.1103/PhysRevB.94.144302
ER  - 
@article{
author = "Gligorić, Goran and Maluckov, Aleksandra and Hadžievski, Ljupčo and Flach, Sergej and Malomed, Boris A.",
year = "2016",
abstract = "We report the coexistence and properties of stable compact localized states (CLSs) and discrete solitons (DSs) for nonlinear spinor waves on a flat-band network with spin-orbit coupling (SOC). The system can be implemented by means of a binary Bose-Einstein condensate loaded in the corresponding optical lattice. In the linear limit, the SOC opens a minigap between flat and dispersive bands in the systems band-gap structure, and preserves the existence of CLSs at the flat-band frequency, simultaneously lowering their symmetry. Adding on-site cubic nonlinearity, the CLSs persist and remain available in an exact analytical form, with frequencies that are smoothly tuned into the minigap. Inside of the minigap, the CLS and DS families are stable in narrow areas adjacent to the FB. Deep inside the semi-infinite gap, both the CLSs and DSs are stable too.",
journal = "Physical Review B: Condensed Matter and Materials Physics",
title = "Nonlinear localized flat-band modes with spin-orbit coupling",
volume = "94",
number = "14",
pages = "144302",
doi = "10.1103/PhysRevB.94.144302"
}
Gligorić, G., Maluckov, A., Hadžievski, L., Flach, S.,& Malomed, B. A.. (2016). Nonlinear localized flat-band modes with spin-orbit coupling. in Physical Review B: Condensed Matter and Materials Physics, 94(14), 144302.
https://doi.org/10.1103/PhysRevB.94.144302
Gligorić G, Maluckov A, Hadžievski L, Flach S, Malomed BA. Nonlinear localized flat-band modes with spin-orbit coupling. in Physical Review B: Condensed Matter and Materials Physics. 2016;94(14):144302.
doi:10.1103/PhysRevB.94.144302 .
Gligorić, Goran, Maluckov, Aleksandra, Hadžievski, Ljupčo, Flach, Sergej, Malomed, Boris A., "Nonlinear localized flat-band modes with spin-orbit coupling" in Physical Review B: Condensed Matter and Materials Physics, 94, no. 14 (2016):144302,
https://doi.org/10.1103/PhysRevB.94.144302 . .
25
22
26

Nonlinear localized flat-band modes with spin-orbit coupling

Gligorić, Goran; Maluckov, Aleksandra; Hadžievski, Ljupčo; Flach, Sergej; Malomed, Boris A.

(2016)

TY  - JOUR
AU  - Gligorić, Goran
AU  - Maluckov, Aleksandra
AU  - Hadžievski, Ljupčo
AU  - Flach, Sergej
AU  - Malomed, Boris A.
PY  - 2016
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8840
AB  - We report the coexistence and properties of stable compact localized states (CLSs) and discrete solitons (DSs) for nonlinear spinor waves on a flat-band network with spin-orbit coupling (SOC). The system can be implemented by means of a binary Bose-Einstein condensate loaded in the corresponding optical lattice. In the linear limit, the SOC opens a minigap between flat and dispersive bands in the systems band-gap structure, and preserves the existence of CLSs at the flat-band frequency, simultaneously lowering their symmetry. Adding on-site cubic nonlinearity, the CLSs persist and remain available in an exact analytical form, with frequencies that are smoothly tuned into the minigap. Inside of the minigap, the CLS and DS families are stable in narrow areas adjacent to the FB. Deep inside the semi-infinite gap, both the CLSs and DSs are stable too.
T2  - Physical Review B: Condensed Matter and Materials Physics
T1  - Nonlinear localized flat-band modes with spin-orbit coupling
VL  - 94
IS  - 14
SP  - 144302
DO  - 10.1103/PhysRevB.94.144302
ER  - 
@article{
author = "Gligorić, Goran and Maluckov, Aleksandra and Hadžievski, Ljupčo and Flach, Sergej and Malomed, Boris A.",
year = "2016",
abstract = "We report the coexistence and properties of stable compact localized states (CLSs) and discrete solitons (DSs) for nonlinear spinor waves on a flat-band network with spin-orbit coupling (SOC). The system can be implemented by means of a binary Bose-Einstein condensate loaded in the corresponding optical lattice. In the linear limit, the SOC opens a minigap between flat and dispersive bands in the systems band-gap structure, and preserves the existence of CLSs at the flat-band frequency, simultaneously lowering their symmetry. Adding on-site cubic nonlinearity, the CLSs persist and remain available in an exact analytical form, with frequencies that are smoothly tuned into the minigap. Inside of the minigap, the CLS and DS families are stable in narrow areas adjacent to the FB. Deep inside the semi-infinite gap, both the CLSs and DSs are stable too.",
journal = "Physical Review B: Condensed Matter and Materials Physics",
title = "Nonlinear localized flat-band modes with spin-orbit coupling",
volume = "94",
number = "14",
pages = "144302",
doi = "10.1103/PhysRevB.94.144302"
}
Gligorić, G., Maluckov, A., Hadžievski, L., Flach, S.,& Malomed, B. A.. (2016). Nonlinear localized flat-band modes with spin-orbit coupling. in Physical Review B: Condensed Matter and Materials Physics, 94(14), 144302.
https://doi.org/10.1103/PhysRevB.94.144302
Gligorić G, Maluckov A, Hadžievski L, Flach S, Malomed BA. Nonlinear localized flat-band modes with spin-orbit coupling. in Physical Review B: Condensed Matter and Materials Physics. 2016;94(14):144302.
doi:10.1103/PhysRevB.94.144302 .
Gligorić, Goran, Maluckov, Aleksandra, Hadžievski, Ljupčo, Flach, Sergej, Malomed, Boris A., "Nonlinear localized flat-band modes with spin-orbit coupling" in Physical Review B: Condensed Matter and Materials Physics, 94, no. 14 (2016):144302,
https://doi.org/10.1103/PhysRevB.94.144302 . .
25
22
26

Rib-Cage-Movement Measurements as a Potential New Trigger Signal in Non-Invasive Mechanical Ventilation

Ivanović, Marija D.; Petrović, Jovana S.; Miletić, Marjan; Daničić, Aleksandar; Bojović, Boško P.; Vukcevic, M.; Lazovic, B.; Gluvić, Zoran; Hadžievski, Ljupčo; Allsop, Thomas P.; Webb, David J.

(2015)

TY  - CONF
AU  - Ivanović, Marija D.
AU  - Petrović, Jovana S.
AU  - Miletić, Marjan
AU  - Daničić, Aleksandar
AU  - Bojović, Boško P.
AU  - Vukcevic, M.
AU  - Lazovic, B.
AU  - Gluvić, Zoran
AU  - Hadžievski, Ljupčo
AU  - Allsop, Thomas P.
AU  - Webb, David J.
PY  - 2015
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/7097
AB  - Non-invasive ventilation performed through an oronasal mask is a standard in clinical and homecare mechanical ventilation. Besides all its advantages, inevitable leaks through the mask cause errors in the feedback information provided by the airflow sensor and, hence, patient-ventilator asynchrony with multiple negative consequences. Here we investigate a new way to provide a trigger to the ventilator. The method is based on the measurement of rib cage movement at the onset of inspiration and during breathing by fibre-optic sensors. In a series of simultaneous measurements by a long-period fibre grating sensor and pneumotachograph we provide the statistical evidence of the 200 ms lag of the pneumo with respect the fibre-optic signal. The lag is registered consistently across three independent delay metrics. Further, we discuss exceptions from this trend and identify the needed improvements to the proposed fibre-sensing scheme.
T1  - Rib-Cage-Movement Measurements as a Potential New Trigger Signal in Non-Invasive Mechanical Ventilation
SP  - 4511
EP  - 4514
ER  - 
@conference{
author = "Ivanović, Marija D. and Petrović, Jovana S. and Miletić, Marjan and Daničić, Aleksandar and Bojović, Boško P. and Vukcevic, M. and Lazovic, B. and Gluvić, Zoran and Hadžievski, Ljupčo and Allsop, Thomas P. and Webb, David J.",
year = "2015",
abstract = "Non-invasive ventilation performed through an oronasal mask is a standard in clinical and homecare mechanical ventilation. Besides all its advantages, inevitable leaks through the mask cause errors in the feedback information provided by the airflow sensor and, hence, patient-ventilator asynchrony with multiple negative consequences. Here we investigate a new way to provide a trigger to the ventilator. The method is based on the measurement of rib cage movement at the onset of inspiration and during breathing by fibre-optic sensors. In a series of simultaneous measurements by a long-period fibre grating sensor and pneumotachograph we provide the statistical evidence of the 200 ms lag of the pneumo with respect the fibre-optic signal. The lag is registered consistently across three independent delay metrics. Further, we discuss exceptions from this trend and identify the needed improvements to the proposed fibre-sensing scheme.",
title = "Rib-Cage-Movement Measurements as a Potential New Trigger Signal in Non-Invasive Mechanical Ventilation",
pages = "4511-4514"
}
Ivanović, M. D., Petrović, J. S., Miletić, M., Daničić, A., Bojović, B. P., Vukcevic, M., Lazovic, B., Gluvić, Z., Hadžievski, L., Allsop, T. P.,& Webb, D. J.. (2015). Rib-Cage-Movement Measurements as a Potential New Trigger Signal in Non-Invasive Mechanical Ventilation. , 4511-4514.
Ivanović MD, Petrović JS, Miletić M, Daničić A, Bojović BP, Vukcevic M, Lazovic B, Gluvić Z, Hadžievski L, Allsop TP, Webb DJ. Rib-Cage-Movement Measurements as a Potential New Trigger Signal in Non-Invasive Mechanical Ventilation. 2015;:4511-4514..
Ivanović, Marija D., Petrović, Jovana S., Miletić, Marjan, Daničić, Aleksandar, Bojović, Boško P., Vukcevic, M., Lazovic, B., Gluvić, Zoran, Hadžievski, Ljupčo, Allsop, Thomas P., Webb, David J., "Rib-Cage-Movement Measurements as a Potential New Trigger Signal in Non-Invasive Mechanical Ventilation" (2015):4511-4514.
2

Coherent light propagation through multicore optical fibers with linearly coupled cores

Radosavljević, Ana; Daničić, Aleksandar; Petrović, Jovana S.; Maluckov, Aleksandra; Hadžievski, Ljupčo

(2015)

TY  - JOUR
AU  - Radosavljević, Ana
AU  - Daničić, Aleksandar
AU  - Petrović, Jovana S.
AU  - Maluckov, Aleksandra
AU  - Hadžievski, Ljupčo
PY  - 2015
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/872
AB  - Multicore fibers with linearly coupled cores are considered as a means of the coherent transport needed for high-capacity communication systems and high-power fiber lasers. The conditions of the existence and stability of coherent light propagation in multicore fibers with circularly arranged cores are derived. The multicore fiber is modeled by the linear discrete complex Ginzburg-Landau equation, while its eigenvalues are found analytically. The inverse eigenvalue problem proposing the commensurability of eigenvalues is solved to find the intercore coupling coefficients that support periodic revivals of the input state. Both planar modes and vortices are considered. Effects of the central core and material loss/gain on eigenvalue commensurability conditions and mode dynamics are studied in detail. (C) 2015 Optical Society of America
T2  - Journal of the Optical Society of America. B: Optical Physics
T1  - Coherent light propagation through multicore optical fibers with linearly coupled cores
VL  - 32
IS  - 12
SP  - 2520
EP  - 2527
DO  - 10.1364/JOSAB.32.002520
ER  - 
@article{
author = "Radosavljević, Ana and Daničić, Aleksandar and Petrović, Jovana S. and Maluckov, Aleksandra and Hadžievski, Ljupčo",
year = "2015",
abstract = "Multicore fibers with linearly coupled cores are considered as a means of the coherent transport needed for high-capacity communication systems and high-power fiber lasers. The conditions of the existence and stability of coherent light propagation in multicore fibers with circularly arranged cores are derived. The multicore fiber is modeled by the linear discrete complex Ginzburg-Landau equation, while its eigenvalues are found analytically. The inverse eigenvalue problem proposing the commensurability of eigenvalues is solved to find the intercore coupling coefficients that support periodic revivals of the input state. Both planar modes and vortices are considered. Effects of the central core and material loss/gain on eigenvalue commensurability conditions and mode dynamics are studied in detail. (C) 2015 Optical Society of America",
journal = "Journal of the Optical Society of America. B: Optical Physics",
title = "Coherent light propagation through multicore optical fibers with linearly coupled cores",
volume = "32",
number = "12",
pages = "2520-2527",
doi = "10.1364/JOSAB.32.002520"
}
Radosavljević, A., Daničić, A., Petrović, J. S., Maluckov, A.,& Hadžievski, L.. (2015). Coherent light propagation through multicore optical fibers with linearly coupled cores. in Journal of the Optical Society of America. B: Optical Physics, 32(12), 2520-2527.
https://doi.org/10.1364/JOSAB.32.002520
Radosavljević A, Daničić A, Petrović JS, Maluckov A, Hadžievski L. Coherent light propagation through multicore optical fibers with linearly coupled cores. in Journal of the Optical Society of America. B: Optical Physics. 2015;32(12):2520-2527.
doi:10.1364/JOSAB.32.002520 .
Radosavljević, Ana, Daničić, Aleksandar, Petrović, Jovana S., Maluckov, Aleksandra, Hadžievski, Ljupčo, "Coherent light propagation through multicore optical fibers with linearly coupled cores" in Journal of the Optical Society of America. B: Optical Physics, 32, no. 12 (2015):2520-2527,
https://doi.org/10.1364/JOSAB.32.002520 . .
6
8
9

Composite localized modes in discretized spin-orbit-coupled Bose-Einstein condensates

Beličev, Petra; Gligorić, Goran; Petrović, Jovana S.; Maluckov, Aleksandra; Hadžievski, Ljupčo; Malomed, Boris A.

(2015)

TY  - JOUR
AU  - Beličev, Petra
AU  - Gligorić, Goran
AU  - Petrović, Jovana S.
AU  - Maluckov, Aleksandra
AU  - Hadžievski, Ljupčo
AU  - Malomed, Boris A.
PY  - 2015
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/443
AB  - We introduce a discrete model for binary spin-orbit-coupled Bose-Einstein condensates trapped in a deep one-dimensional optical lattice. Two different types of the couplings are considered, with spatial derivatives acting inside each species, or between the species. The discrete system with inter-site couplings dominated by the spin-orbit coupling (SOC), while the usual hopping is negligible, emulates condensates composed of extremely heavy atoms, as well as those with opposite signs of the effective atomic masses in the two components. Stable localized composite states of miscible and immiscible types are constructed. The effect of the SOC on the immiscibility-miscibility transition in the localized complexes, which emulates the phase transition between insulating and conducting states in semiconductors, is studied.
T2  - Journal of Physics. B: Atomic Molecular and Optical Physics
T1  - Composite localized modes in discretized spin-orbit-coupled Bose-Einstein condensates
VL  - 48
IS  - 6
DO  - 10.1088/0953-4075/48/6/065301
ER  - 
@article{
author = "Beličev, Petra and Gligorić, Goran and Petrović, Jovana S. and Maluckov, Aleksandra and Hadžievski, Ljupčo and Malomed, Boris A.",
year = "2015",
abstract = "We introduce a discrete model for binary spin-orbit-coupled Bose-Einstein condensates trapped in a deep one-dimensional optical lattice. Two different types of the couplings are considered, with spatial derivatives acting inside each species, or between the species. The discrete system with inter-site couplings dominated by the spin-orbit coupling (SOC), while the usual hopping is negligible, emulates condensates composed of extremely heavy atoms, as well as those with opposite signs of the effective atomic masses in the two components. Stable localized composite states of miscible and immiscible types are constructed. The effect of the SOC on the immiscibility-miscibility transition in the localized complexes, which emulates the phase transition between insulating and conducting states in semiconductors, is studied.",
journal = "Journal of Physics. B: Atomic Molecular and Optical Physics",
title = "Composite localized modes in discretized spin-orbit-coupled Bose-Einstein condensates",
volume = "48",
number = "6",
doi = "10.1088/0953-4075/48/6/065301"
}
Beličev, P., Gligorić, G., Petrović, J. S., Maluckov, A., Hadžievski, L.,& Malomed, B. A.. (2015). Composite localized modes in discretized spin-orbit-coupled Bose-Einstein condensates. in Journal of Physics. B: Atomic Molecular and Optical Physics, 48(6).
https://doi.org/10.1088/0953-4075/48/6/065301
Beličev P, Gligorić G, Petrović JS, Maluckov A, Hadžievski L, Malomed BA. Composite localized modes in discretized spin-orbit-coupled Bose-Einstein condensates. in Journal of Physics. B: Atomic Molecular and Optical Physics. 2015;48(6).
doi:10.1088/0953-4075/48/6/065301 .
Beličev, Petra, Gligorić, Goran, Petrović, Jovana S., Maluckov, Aleksandra, Hadžievski, Ljupčo, Malomed, Boris A., "Composite localized modes in discretized spin-orbit-coupled Bose-Einstein condensates" in Journal of Physics. B: Atomic Molecular and Optical Physics, 48, no. 6 (2015),
https://doi.org/10.1088/0953-4075/48/6/065301 . .
2
21
18
21

Stable optical vortices in nonlinear multicore fibers

Hadžievski, Ljupčo; Maluckov, Aleksandra; Rubenchik, Alexander M.; Turitsyn, Sergei

(2015)

TY  - JOUR
AU  - Hadžievski, Ljupčo
AU  - Maluckov, Aleksandra
AU  - Rubenchik, Alexander M.
AU  - Turitsyn, Sergei
PY  - 2015
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/748
AB  - The multicore fiber (MCF) is a physical system of high practical importance. In addition to standard exploitation, MCFs may support discrete vortices that carry orbital angular momentum suitable for spatial-division multiplexing in high-capacity fiber-optic communication systems. These discrete vortices may also be attractive for high-power laser applications. We present the conditions of existence, stability, and coherent propagation of such optical vortices for two practical MCF designs. Through optimization, we found stable discrete vortices that were capable of transferring high coherent power through the MCF.
T2  - Light-Science and Applications
T1  - Stable optical vortices in nonlinear multicore fibers
VL  - 4
DO  - 10.1038/lsa.2015.87
ER  - 
@article{
author = "Hadžievski, Ljupčo and Maluckov, Aleksandra and Rubenchik, Alexander M. and Turitsyn, Sergei",
year = "2015",
abstract = "The multicore fiber (MCF) is a physical system of high practical importance. In addition to standard exploitation, MCFs may support discrete vortices that carry orbital angular momentum suitable for spatial-division multiplexing in high-capacity fiber-optic communication systems. These discrete vortices may also be attractive for high-power laser applications. We present the conditions of existence, stability, and coherent propagation of such optical vortices for two practical MCF designs. Through optimization, we found stable discrete vortices that were capable of transferring high coherent power through the MCF.",
journal = "Light-Science and Applications",
title = "Stable optical vortices in nonlinear multicore fibers",
volume = "4",
doi = "10.1038/lsa.2015.87"
}
Hadžievski, L., Maluckov, A., Rubenchik, A. M.,& Turitsyn, S.. (2015). Stable optical vortices in nonlinear multicore fibers. in Light-Science and Applications, 4.
https://doi.org/10.1038/lsa.2015.87
Hadžievski L, Maluckov A, Rubenchik AM, Turitsyn S. Stable optical vortices in nonlinear multicore fibers. in Light-Science and Applications. 2015;4.
doi:10.1038/lsa.2015.87 .
Hadžievski, Ljupčo, Maluckov, Aleksandra, Rubenchik, Alexander M., Turitsyn, Sergei, "Stable optical vortices in nonlinear multicore fibers" in Light-Science and Applications, 4 (2015),
https://doi.org/10.1038/lsa.2015.87 . .
16
16
16

Soliton nanoantennas in two-dimensional arrays of quantum dots

Gligorić, Goran; Maluckov, Aleksandra; Hadžievski, Ljupčo; Slepyan, G. Ya; Malomed, B. A.

(2015)

TY  - JOUR
AU  - Gligorić, Goran
AU  - Maluckov, Aleksandra
AU  - Hadžievski, Ljupčo
AU  - Slepyan, G. Ya
AU  - Malomed, B. A.
PY  - 2015
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/567
AB  - We consider two-dimensional (2D) arrays of self-organized semiconductor quantum dots (QDs) strongly interacting with electromagnetic field in the regime of Rabi oscillations. The QD array built of two-level states is modelled by two coupled systems of discrete nonlinear Schrodinger equations. Localized modes in the form of single-peaked fundamental and vortical stationary Rabi solitons and self-trapped breathers have been found. The results for the stability, mobility and radiative properties of the Rabi modes suggest a concept of a self-assembled 2D soliton-based nano-antenna, which is stable against imperfections In particular, we discuss the implementation of such a nano-antenna in the form of surface plasmon solitons in graphene, and illustrate possibilities to control their operation by means of optical tools.
T2  - Journal of Physics: Condensed Matter
T1  - Soliton nanoantennas in two-dimensional arrays of quantum dots
VL  - 27
IS  - 22
DO  - 10.1088/0953-8984/27/22/225301
ER  - 
@article{
author = "Gligorić, Goran and Maluckov, Aleksandra and Hadžievski, Ljupčo and Slepyan, G. Ya and Malomed, B. A.",
year = "2015",
abstract = "We consider two-dimensional (2D) arrays of self-organized semiconductor quantum dots (QDs) strongly interacting with electromagnetic field in the regime of Rabi oscillations. The QD array built of two-level states is modelled by two coupled systems of discrete nonlinear Schrodinger equations. Localized modes in the form of single-peaked fundamental and vortical stationary Rabi solitons and self-trapped breathers have been found. The results for the stability, mobility and radiative properties of the Rabi modes suggest a concept of a self-assembled 2D soliton-based nano-antenna, which is stable against imperfections In particular, we discuss the implementation of such a nano-antenna in the form of surface plasmon solitons in graphene, and illustrate possibilities to control their operation by means of optical tools.",
journal = "Journal of Physics: Condensed Matter",
title = "Soliton nanoantennas in two-dimensional arrays of quantum dots",
volume = "27",
number = "22",
doi = "10.1088/0953-8984/27/22/225301"
}
Gligorić, G., Maluckov, A., Hadžievski, L., Slepyan, G. Y.,& Malomed, B. A.. (2015). Soliton nanoantennas in two-dimensional arrays of quantum dots. in Journal of Physics: Condensed Matter, 27(22).
https://doi.org/10.1088/0953-8984/27/22/225301
Gligorić G, Maluckov A, Hadžievski L, Slepyan GY, Malomed BA. Soliton nanoantennas in two-dimensional arrays of quantum dots. in Journal of Physics: Condensed Matter. 2015;27(22).
doi:10.1088/0953-8984/27/22/225301 .
Gligorić, Goran, Maluckov, Aleksandra, Hadžievski, Ljupčo, Slepyan, G. Ya, Malomed, B. A., "Soliton nanoantennas in two-dimensional arrays of quantum dots" in Journal of Physics: Condensed Matter, 27, no. 22 (2015),
https://doi.org/10.1088/0953-8984/27/22/225301 . .
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Non-invasive respiratory monitoring using long-period fiber grating sensors

Petrovic, M. D.; Petrović, Jovana S.; Daničić, Aleksandar; Vukcevic, M.; Bojović, Boško P.; Hadžievski, Ljupčo; Allsop, Thomas P.; Lloyd, G.; Webb, David J.

(2014)

TY  - JOUR
AU  - Petrovic, M. D.
AU  - Petrović, Jovana S.
AU  - Daničić, Aleksandar
AU  - Vukcevic, M.
AU  - Bojović, Boško P.
AU  - Hadžievski, Ljupčo
AU  - Allsop, Thomas P.
AU  - Lloyd, G.
AU  - Webb, David J.
PY  - 2014
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/5946
AB  - In non-invasive ventilation, continuous monitoring of respiratory volumes is essential. Here, we present a method for the measurement of respiratory volumes by a single fiber-grating sensor of bending and provide the proof-of-principle by applying a calibration-test measurement procedure on a set of 18 healthy volunteers. Results establish a linear correlation between a change in lung volume and the corresponding change in a local thorax curvature. They also show good sensor accuracy in measurements of tidal and minute respiratory volumes for different types of breathing. The proposed technique does not rely on the air flow through an oronasal mask or the observation of chest movement by a clinician, which distinguishes it from the current clinical practice. (C) 2014 Optical Society of America
T2  - Biomedical Optics Express
T1  - Non-invasive respiratory monitoring using long-period fiber grating sensors
VL  - 5
IS  - 4
SP  - 1136
EP  - 1144
DO  - 10.1364/BOE.5.001136
ER  - 
@article{
author = "Petrovic, M. D. and Petrović, Jovana S. and Daničić, Aleksandar and Vukcevic, M. and Bojović, Boško P. and Hadžievski, Ljupčo and Allsop, Thomas P. and Lloyd, G. and Webb, David J.",
year = "2014",
abstract = "In non-invasive ventilation, continuous monitoring of respiratory volumes is essential. Here, we present a method for the measurement of respiratory volumes by a single fiber-grating sensor of bending and provide the proof-of-principle by applying a calibration-test measurement procedure on a set of 18 healthy volunteers. Results establish a linear correlation between a change in lung volume and the corresponding change in a local thorax curvature. They also show good sensor accuracy in measurements of tidal and minute respiratory volumes for different types of breathing. The proposed technique does not rely on the air flow through an oronasal mask or the observation of chest movement by a clinician, which distinguishes it from the current clinical practice. (C) 2014 Optical Society of America",
journal = "Biomedical Optics Express",
title = "Non-invasive respiratory monitoring using long-period fiber grating sensors",
volume = "5",
number = "4",
pages = "1136-1144",
doi = "10.1364/BOE.5.001136"
}
Petrovic, M. D., Petrović, J. S., Daničić, A., Vukcevic, M., Bojović, B. P., Hadžievski, L., Allsop, T. P., Lloyd, G.,& Webb, D. J.. (2014). Non-invasive respiratory monitoring using long-period fiber grating sensors. in Biomedical Optics Express, 5(4), 1136-1144.
https://doi.org/10.1364/BOE.5.001136
Petrovic MD, Petrović JS, Daničić A, Vukcevic M, Bojović BP, Hadžievski L, Allsop TP, Lloyd G, Webb DJ. Non-invasive respiratory monitoring using long-period fiber grating sensors. in Biomedical Optics Express. 2014;5(4):1136-1144.
doi:10.1364/BOE.5.001136 .
Petrovic, M. D., Petrović, Jovana S., Daničić, Aleksandar, Vukcevic, M., Bojović, Boško P., Hadžievski, Ljupčo, Allsop, Thomas P., Lloyd, G., Webb, David J., "Non-invasive respiratory monitoring using long-period fiber grating sensors" in Biomedical Optics Express, 5, no. 4 (2014):1136-1144,
https://doi.org/10.1364/BOE.5.001136 . .
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Cardiac induced localised motion of the human torso detected by a long period grating fibre optic sensing scheme

Allsop, Thomas P.; Lloyd, G.; Bhamber, R. S.; Hadžievski, Ljupčo; Halliday, M.; Webb, David J.

(2014)

TY  - CONF
AU  - Allsop, Thomas P.
AU  - Lloyd, G.
AU  - Bhamber, R. S.
AU  - Hadžievski, Ljupčo
AU  - Halliday, M.
AU  - Webb, David J.
PY  - 2014
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/7054
AB  - Cardiovascular health of the human population is a major concern for medical clinicians, with cardiovascular diseases responsible for 48% of all deaths worldwide, according to the World Health Organisation. Therefore the development of new practicable and economical diagnostic tools to scrutinise the cardiovascular health of humans is a major driver for clinicians. We offer a new technique to obtain seismocardiographic signals covering both ballistocardiography (below 20Hz) and audible heart sounds (20Hz upwards). The detection scheme is based upon an array of curvature/displacement sensors using fibre optic long period gratings interrogated using a variation of the derivative spectroscopy interrogation technique
T1  - Cardiac induced localised motion of the human torso detected by a long period grating fibre optic sensing scheme
VL  - 9157
DO  - 10.1117/12.2059089
ER  - 
@conference{
author = "Allsop, Thomas P. and Lloyd, G. and Bhamber, R. S. and Hadžievski, Ljupčo and Halliday, M. and Webb, David J.",
year = "2014",
abstract = "Cardiovascular health of the human population is a major concern for medical clinicians, with cardiovascular diseases responsible for 48% of all deaths worldwide, according to the World Health Organisation. Therefore the development of new practicable and economical diagnostic tools to scrutinise the cardiovascular health of humans is a major driver for clinicians. We offer a new technique to obtain seismocardiographic signals covering both ballistocardiography (below 20Hz) and audible heart sounds (20Hz upwards). The detection scheme is based upon an array of curvature/displacement sensors using fibre optic long period gratings interrogated using a variation of the derivative spectroscopy interrogation technique",
title = "Cardiac induced localised motion of the human torso detected by a long period grating fibre optic sensing scheme",
volume = "9157",
doi = "10.1117/12.2059089"
}
Allsop, T. P., Lloyd, G., Bhamber, R. S., Hadžievski, L., Halliday, M.,& Webb, D. J.. (2014). Cardiac induced localised motion of the human torso detected by a long period grating fibre optic sensing scheme. , 9157.
https://doi.org/10.1117/12.2059089
Allsop TP, Lloyd G, Bhamber RS, Hadžievski L, Halliday M, Webb DJ. Cardiac induced localised motion of the human torso detected by a long period grating fibre optic sensing scheme. 2014;9157.
doi:10.1117/12.2059089 .
Allsop, Thomas P., Lloyd, G., Bhamber, R. S., Hadžievski, Ljupčo, Halliday, M., Webb, David J., "Cardiac induced localised motion of the human torso detected by a long period grating fibre optic sensing scheme", 9157 (2014),
https://doi.org/10.1117/12.2059089 . .
1
1

Cardiac-induced localized thoracic motion detected by a fiber optic sensing scheme

Allsop, Thomas P.; Lloyd, Glynn; Bhamber, Ranjeet S.; Hadžievski, Ljupčo; Halliday, Michael; Webb, David J.; Bennion, Ian

(2014)

TY  - JOUR
AU  - Allsop, Thomas P.
AU  - Lloyd, Glynn
AU  - Bhamber, Ranjeet S.
AU  - Hadžievski, Ljupčo
AU  - Halliday, Michael
AU  - Webb, David J.
AU  - Bennion, Ian
PY  - 2014
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/337
AB  - The cardiovascular health of the human population is a major concern for medical clinicians, with cardiovascular diseases responsible for 48% of all deaths worldwide, according to the World Health Organization. The development of new diagnostic tools that are practicable and economical to scrutinize the cardiovascular health of humans is a major driver for clinicians. We offer a new technique to obtain seismocardiographic signals up to 54 Hz covering both ballistocardiography (below 20 Hz) and audible heart sounds (20 Hz upward), using a system based on curvature sensors formed from fiber optic long period gratings. This system can visualize the real-time three-dimensional (3-D) mechanical motion of the heart by using the data from the sensing array in conjunction with a bespoke 3-D shape reconstruction algorithm. Visualization is demonstrated by adhering three to four sensors on the outside of the thorax and in close proximity to the apex of the heart; the sensing scheme revealed a complex motion of the heart wall next to the apex region of the heart. The detection scheme is low-cost, portable, easily operated and has the potential for ambulatory applications. (C) 2014 Society of Photo-Optical Instrumentation Engineers (SPIE)
T2  - Journal of Biomedical Optics
T1  - Cardiac-induced localized thoracic motion detected by a fiber optic sensing scheme
VL  - 19
IS  - 11
DO  - 10.1117/1.JBO.19.11.117006
ER  - 
@article{
author = "Allsop, Thomas P. and Lloyd, Glynn and Bhamber, Ranjeet S. and Hadžievski, Ljupčo and Halliday, Michael and Webb, David J. and Bennion, Ian",
year = "2014",
abstract = "The cardiovascular health of the human population is a major concern for medical clinicians, with cardiovascular diseases responsible for 48% of all deaths worldwide, according to the World Health Organization. The development of new diagnostic tools that are practicable and economical to scrutinize the cardiovascular health of humans is a major driver for clinicians. We offer a new technique to obtain seismocardiographic signals up to 54 Hz covering both ballistocardiography (below 20 Hz) and audible heart sounds (20 Hz upward), using a system based on curvature sensors formed from fiber optic long period gratings. This system can visualize the real-time three-dimensional (3-D) mechanical motion of the heart by using the data from the sensing array in conjunction with a bespoke 3-D shape reconstruction algorithm. Visualization is demonstrated by adhering three to four sensors on the outside of the thorax and in close proximity to the apex of the heart; the sensing scheme revealed a complex motion of the heart wall next to the apex region of the heart. The detection scheme is low-cost, portable, easily operated and has the potential for ambulatory applications. (C) 2014 Society of Photo-Optical Instrumentation Engineers (SPIE)",
journal = "Journal of Biomedical Optics",
title = "Cardiac-induced localized thoracic motion detected by a fiber optic sensing scheme",
volume = "19",
number = "11",
doi = "10.1117/1.JBO.19.11.117006"
}
Allsop, T. P., Lloyd, G., Bhamber, R. S., Hadžievski, L., Halliday, M., Webb, D. J.,& Bennion, I.. (2014). Cardiac-induced localized thoracic motion detected by a fiber optic sensing scheme. in Journal of Biomedical Optics, 19(11).
https://doi.org/10.1117/1.JBO.19.11.117006
Allsop TP, Lloyd G, Bhamber RS, Hadžievski L, Halliday M, Webb DJ, Bennion I. Cardiac-induced localized thoracic motion detected by a fiber optic sensing scheme. in Journal of Biomedical Optics. 2014;19(11).
doi:10.1117/1.JBO.19.11.117006 .
Allsop, Thomas P., Lloyd, Glynn, Bhamber, Ranjeet S., Hadžievski, Ljupčo, Halliday, Michael, Webb, David J., Bennion, Ian, "Cardiac-induced localized thoracic motion detected by a fiber optic sensing scheme" in Journal of Biomedical Optics, 19, no. 11 (2014),
https://doi.org/10.1117/1.JBO.19.11.117006 . .
10
9
9

Localized modes in mini-gaps opened by periodically modulated intersite coupling in two-dimensional nonlinear lattices

Gligorić, Goran; Maluckov, Aleksandra; Hadžievski, Ljupčo; Malomed, Boris A.

(2014)

TY  - JOUR
AU  - Gligorić, Goran
AU  - Maluckov, Aleksandra
AU  - Hadžievski, Ljupčo
AU  - Malomed, Boris A.
PY  - 2014
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/6065
AB  - Spatially periodic modulation of the intersite coupling in two-dimensional (2D) nonlinear lattices modifies the eigenvalue spectrum by opening mini-gaps in it. This work aims to build stable localized modes in the new bandgaps. Numerical analysis shows that single-peak and composite two-and four-peak discrete static solitons and breathers emerge as such modes in certain parameter areas inside the mini-gaps of the 2D superlattice induced by the periodic modulation of the intersite coupling along both directions. The single-peak solitons and four-peak discrete solitons are stable in a part of their existence domain, while unstable stationary states (in particular, two-soliton complexes) may readily transform into robust localized breathers. (C) 2014 AIP Publishing LLC.
T2  - Chaos
T1  - Localized modes in mini-gaps opened by periodically modulated intersite coupling in two-dimensional nonlinear lattices
VL  - 24
IS  - 2
DO  - 10.1063/1.4881678
ER  - 
@article{
author = "Gligorić, Goran and Maluckov, Aleksandra and Hadžievski, Ljupčo and Malomed, Boris A.",
year = "2014",
abstract = "Spatially periodic modulation of the intersite coupling in two-dimensional (2D) nonlinear lattices modifies the eigenvalue spectrum by opening mini-gaps in it. This work aims to build stable localized modes in the new bandgaps. Numerical analysis shows that single-peak and composite two-and four-peak discrete static solitons and breathers emerge as such modes in certain parameter areas inside the mini-gaps of the 2D superlattice induced by the periodic modulation of the intersite coupling along both directions. The single-peak solitons and four-peak discrete solitons are stable in a part of their existence domain, while unstable stationary states (in particular, two-soliton complexes) may readily transform into robust localized breathers. (C) 2014 AIP Publishing LLC.",
journal = "Chaos",
title = "Localized modes in mini-gaps opened by periodically modulated intersite coupling in two-dimensional nonlinear lattices",
volume = "24",
number = "2",
doi = "10.1063/1.4881678"
}
Gligorić, G., Maluckov, A., Hadžievski, L.,& Malomed, B. A.. (2014). Localized modes in mini-gaps opened by periodically modulated intersite coupling in two-dimensional nonlinear lattices. in Chaos, 24(2).
https://doi.org/10.1063/1.4881678
Gligorić G, Maluckov A, Hadžievski L, Malomed BA. Localized modes in mini-gaps opened by periodically modulated intersite coupling in two-dimensional nonlinear lattices. in Chaos. 2014;24(2).
doi:10.1063/1.4881678 .
Gligorić, Goran, Maluckov, Aleksandra, Hadžievski, Ljupčo, Malomed, Boris A., "Localized modes in mini-gaps opened by periodically modulated intersite coupling in two-dimensional nonlinear lattices" in Chaos, 24, no. 2 (2014),
https://doi.org/10.1063/1.4881678 . .
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