TY  - JOUR
AU  - Petrovic, M. D.
AU  - Petrović, Jovana S.
AU  - Daničić, Aleksandar
AU  - Vukcevic, M.
AU  - Bojović, Boško
AU  - Hadžievski, Ljupčo
AU  - Allsop, Thomas P.
AU  - Lloyd, G.
AU  - Webb, David J.
PY  - 2014
UR  - https://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 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., 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 B, 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, 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 . .

TY  - JOUR
AU  - Stojanović, Marija
AU  - Petrovic, M. D.
AU  - Gligorić, Goran
AU  - Maluckov, Aleksandra
AU  - Hadžievski, Ljupčo
AU  - Malomed, Boris A.
PY  - 2013
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7020
AB  - We investigate the stability and dynamical properties of complexes consisting of two identical vortices with topological charges S = 1 and 2 in the system of two linearly on-site-coupled two-dimensional (2D) vortices. The system is mathematically modeled by two coupled nonlinear differential-difference 2D Schrodinger equations. It is found that the on-site and off-site vortices form symmetric and asymmetric complexes, respectively, with respect to the interface sites. In general, the existence regions of complexes shrink with an increase of the interlattice coupling strength. Stable symmetric complexes exist within the stability window in the parametric space whose width gradually shrinks with an increase of the interlattice coupling strength. The asymmetric vortex complexes are unstable, except in the limit of vanishing coupling between lattices.
T2  - Physica Scripta
T1  - Vortex complexes in two-dimensional optical lattices linearly coupled at a single site
VL  - T157
DO  - 10.1088/0031-8949/2013/T157/014030
ER  - 

@article{
author = "Stojanović, Marija and Petrovic, M. D. and Gligorić, Goran and Maluckov, Aleksandra and Hadžievski, Ljupčo and Malomed, Boris A.",
year = "2013",
abstract = "We investigate the stability and dynamical properties of complexes consisting of two identical vortices with topological charges S = 1 and 2 in the system of two linearly on-site-coupled two-dimensional (2D) vortices. The system is mathematically modeled by two coupled nonlinear differential-difference 2D Schrodinger equations. It is found that the on-site and off-site vortices form symmetric and asymmetric complexes, respectively, with respect to the interface sites. In general, the existence regions of complexes shrink with an increase of the interlattice coupling strength. Stable symmetric complexes exist within the stability window in the parametric space whose width gradually shrinks with an increase of the interlattice coupling strength. The asymmetric vortex complexes are unstable, except in the limit of vanishing coupling between lattices.",
journal = "Physica Scripta",
title = "Vortex complexes in two-dimensional optical lattices linearly coupled at a single site",
volume = "T157",
doi = "10.1088/0031-8949/2013/T157/014030"
}

Stojanović, M., Petrovic, M. D., Gligorić, G., Maluckov, A., Hadžievski, L.,& Malomed, B. A.. (2013). Vortex complexes in two-dimensional optical lattices linearly coupled at a single site. in Physica Scripta, T157.
https://doi.org/10.1088/0031-8949/2013/T157/014030

Stojanović M, Petrovic MD, Gligorić G, Maluckov A, Hadžievski L, Malomed BA. Vortex complexes in two-dimensional optical lattices linearly coupled at a single site. in Physica Scripta. 2013;T157.
doi:10.1088/0031-8949/2013/T157/014030 .

Stojanović, Marija, Petrovic, M. D., Gligorić, Goran, Maluckov, Aleksandra, Hadžievski, Ljupčo, Malomed, Boris A., "Vortex complexes in two-dimensional optical lattices linearly coupled at a single site" in Physica Scripta, T157 (2013),
https://doi.org/10.1088/0031-8949/2013/T157/014030 . .

TY  - JOUR
AU  - Petrović, M. D.
AU  - Gligorić, Goran
AU  - Maluckov, Aleksandra
AU  - Hadžievski, Ljupčo
AU  - Malomed, Boris A.
PY  - 2011
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/4441
AB  - Existence, stability, and dynamics of soliton complexes, centered at the site of a single transverse link connecting two parallel two-dimensional (2D) lattices, are investigated. The system with the onsite cubic self-focusing nonlinearity is modeled by the pair of discrete nonlinear Schrodinger equations linearly coupled at the single site. Symmetric, antisymmetric, and asymmetric complexes are constructed by means of the variational approximation (VA) and numerical methods. The VA demonstrates that the antisymmetric soliton complexes exist in the entire parameter space, while the symmetric and asymmetric modes can be found below a critical value of the coupling parameter. Numerical results confirm these predictions. The symmetric complexes are destabilized via a supercritical symmetry-breaking pitchfork bifurcation, which gives rise to stable asymmetric modes. The antisymmetric complexes are subject to oscillatory and exponentially instabilities in narrow parametric regions. In bistability areas, stable antisymmetric solitons coexist with either symmetric or asymmetric ones.
T2  - Physical Review E
T1  - Interface solitons in locally linked two-dimensional lattices
VL  - 84
IS  - 2
DO  - 10.1103/PhysRevE.84.026602
ER  - 

@article{
author = "Petrović, M. D. and Gligorić, Goran and Maluckov, Aleksandra and Hadžievski, Ljupčo and Malomed, Boris A.",
year = "2011",
abstract = "Existence, stability, and dynamics of soliton complexes, centered at the site of a single transverse link connecting two parallel two-dimensional (2D) lattices, are investigated. The system with the onsite cubic self-focusing nonlinearity is modeled by the pair of discrete nonlinear Schrodinger equations linearly coupled at the single site. Symmetric, antisymmetric, and asymmetric complexes are constructed by means of the variational approximation (VA) and numerical methods. The VA demonstrates that the antisymmetric soliton complexes exist in the entire parameter space, while the symmetric and asymmetric modes can be found below a critical value of the coupling parameter. Numerical results confirm these predictions. The symmetric complexes are destabilized via a supercritical symmetry-breaking pitchfork bifurcation, which gives rise to stable asymmetric modes. The antisymmetric complexes are subject to oscillatory and exponentially instabilities in narrow parametric regions. In bistability areas, stable antisymmetric solitons coexist with either symmetric or asymmetric ones.",
journal = "Physical Review E",
title = "Interface solitons in locally linked two-dimensional lattices",
volume = "84",
number = "2",
doi = "10.1103/PhysRevE.84.026602"
}

Petrović, M. D., Gligorić, G., Maluckov, A., Hadžievski, L.,& Malomed, B. A.. (2011). Interface solitons in locally linked two-dimensional lattices. in Physical Review E, 84(2).
https://doi.org/10.1103/PhysRevE.84.026602

Petrović MD, Gligorić G, Maluckov A, Hadžievski L, Malomed BA. Interface solitons in locally linked two-dimensional lattices. in Physical Review E. 2011;84(2).
doi:10.1103/PhysRevE.84.026602 .

Petrović, M. D., Gligorić, Goran, Maluckov, Aleksandra, Hadžievski, Ljupčo, Malomed, Boris A., "Interface solitons in locally linked two-dimensional lattices" in Physical Review E, 84, no. 2 (2011),
https://doi.org/10.1103/PhysRevE.84.026602 . .