## Search

Now showing items 1-10 of 2135

#### Closed-form formulae for the derivatives of trigonometric functions at rational multiples of pi

(Applied Mathematics Letters, 2009)

In this sequel to our recent note [D. Cvijovic, Values of the derivatives of the cotangent at rational multiples of pi, Appl. Math. Lett. http://dx.doi.org/10.1016/J.aml.2008.03.013] it is shown, in a unified manner, by ...

#### Stress relaxation in hematite nanoparticles-polystyrene composites

(Macromolecular Rapid Communications, 2000)

The viscoelastic behavior of a polystyrene matrix filled with hematite nanoparticles was investigated using the stress relaxation method. An increase in the elastic moduli of the composites, as well as in the magnitude of ...

#### Rapid detection of the hypertension-associated A1166C polymorphism of the angiotensin II type 1 receptor (AGTR1)

(Genetic Testing, 2002)

Screening for polymorphisms in the human type 1 angiotensin II receptor locus (AGTR1) has led to the identification of an A1166C transversion in the Y-untranslated region. This molecular variant, C-1166, has been linked ...

#### Closed-form evaluation of some families of definite tangent and secant integrals

(Integral Transforms and Special Functions, 2007)

Several families of definite integrals involving the tangent or secant function have been evaluated in closed form by making use of the elementary arguments. Some of them are expressible in terms of a finite combination ...

#### Closed-form summations of certain hypergeometric-type series containing the digamma function

(Journal of Physics. A: Mathematical and Theoretical, 2008)

Recently, interesting novel summation formulae for hypergeometric-type series containing a digamma function as a factor have been established by Miller (2006 J. Phys. A: Math. Gen. 39 3011 - 20) mainly by exploiting already ...

#### Optimal parameterization in the measurements of the thermal diffusivity of thermal barrier coatings

(Thermal Science, 2007)

The paper presents an estimation procedure for the measurement of the thermal diffusivity of thermal barrier coatings deposited on thermal conductive substrates using the laser flash method when the thermal contact resistance ...

#### Determination of Transient Thermal Interface Resistance Between Two Bonded Metal Bodies using the Laser-Flash Method

(International Journal of Thermophysics, 2008)

The paper presents the data reduction analysis for measurements of the transient thermal interface resistance between two bonded metal bodies using the laser-flash method. By using two different mathematical models, i.e., ...

#### Activation of rat pituitary-adrenocortical and sympatho-adrenomedullary system in response to different stressors

(Neuroendocrinology Letters, 2005)

OBJECTIVE: The effects of three different long-term (21 days) stresses: isolation (LTI), forced swimming (LTS) and isolation accompanied by forced swimming (LTI+LTS) on the level of plasma noradrenaline (NA), adrenaline ...

#### Closed-form summation of two families of finite tangent sums

(Applied Mathematics and Computation, 2008)

In our recent paper with Srivastava [D. Cvijovic, H.M. Srivastava, Summation of a family of finite secant sums, Appl. Math. Comput. 190 (2007) 590-598] a remarkably general family of the finite secant sums was summed in ...

#### Stripping extraction of positive ions from a cyclotron

(Physical Review Special Topics - Accelerators and Beams, 2001)

In a multipurpose cyclotron, it is convenient to use stripping extraction to extract selected positive ions in addition to the usual extraction by stripping of negative ions. The ions are specified as positive or negative ...