In commercial software system development, software vendors often face the many difficulties to deal with large amount of requirements that enter the company every day. It is not possible to satisfy all the requirements in given constraint like time, cost, etc. hence there is a need to select the requirements that are more important. Requirements prioritization is a way that can play important ...

The phosphotungstate reagent (PTR) was used for quantitative spectrophotometric determination of physiological forms of vitamin C in blood plasma. An immediate action of PTR on the first half of the tested samples allowed to determine reduced vitamin C concentrations (I) at 700 nm. 10 mM dithiothreitol added to the second half of the samples reduced oxidized vitamin C in it--hence the total amo...

Bilevel problem formulations have received considerable attention as an approach to multidisciplinary optimization in engineering. We examine the analytical and computational properties of one such approach, collaborative optimization. The resulting system-level optimization problems su er from inherent computational di culties due to the bilevel nature of the method. Most notably, it is imposs...

We study correlations of hydrodynamic fluctuations in shear flow analytically and also by dissipative particle dynamics (DPD) simulations. The hydrodynamic equations are linearized around the macroscopic velocity field and then solved by a perturbation method in Fourier-transformed space. The autocorrelation functions (ACFs) from the analytical method are comparedwith results obtained fromDPD s...

Since chemical methods so far proposed for vitamins D determination commonly suffer from coexistence of interfering substances and hence from requirement of designing tedious purifica tion steps, a more simple analytical procedure without such pre-treatment has been strongly desired. During the course of our study on a gas-liquid chromatographic determination of vitamins D (1), efforts were als...