In this article, temperature-responsive window system based on phase change materials is studied by using experimental and numerical methods. The problem is analyzed for the real case (natural environment) and lab environment. Impact of glazing cavity size on the temperature flattening period and its limitations are determined and mathematically described. The results show that the design is effective in reducing interior air temperature variation by increasing the cavity thickness up to 24 mm, which is limited by solid/liquid volume fraction for particular environment.

The aim of this article is to describe the process of implementation of the GPS system for telemetric monitoring in the mining industry. The paper presents the components of this system, supporting infrastructure and capabilities that can be achieved by implementing such a project. In addition to the opportunities provided by this system, telemetry monitoring is given the possibility of extension with monitoring additional information. Below is the current implementation of the phase, field management, constraints, objectives and estimated time for the implementation of such projects.

Introduction: Controlling the presence of contaminants or harmful substances in milk and dairy products provides early detection of risks since their presence, even in legally permitted concentration, increases the risk of damaging human health, especially children's health, such as allergic manifestations, and they can have potentially toxic, carcinogenic and genotoxic effects. Aim of the Study: The aim is to determine the frequency of the presence of contaminants in samples of milk and dairy products in the Republic of Srpska from 2010 to 2012 (metals, radionuclides, aflatoxins and residues of antibiotics and pesticides), and especially to point out their public health significance because of possible health risks. The aim of the paper is to emphasize the need for monitoring all the other contaminants in milk and dairy products specified in regulations. Material and Methods: The frequency of the presence of contaminants in the samples of milk and dairy products (n= 407) was determined on the basis of legally prescribed methodology of sampling, chemical analyses and preparation of expert opinion on food safety in accordance with current food regulations. Descriptive statistical indicators were used (a number of the samples, minimum and maximum concentrations). Chi square test (χ2) of contingency was used for testing the significance of differences in presence of contaminants and residues analyzed and recommended by regulations in samples of milk and dairy products. Results: The results of public health research of contaminants in samples of milk and dairy products indicate that no health defective food samples were determined at tested parameters - metals, radionuclides, aflatoxins, and residues of antibiotics and pesticides. A statistically significant number of samples examined on heavy metal content (83.29% or 339 samples) was determined comparing to the number of samples examined on the other contaminants and residues recommended by regulations in milk and dairy products (χ2=1000.776, p<0.001) Conclusion: The data obtained can serve as a basis for further analysis in the context of milk and dairy product sample monitoring. Although samples of milk and dairy products are safe, a long-term exposure to residues of harmful substances results in cumulative effect and damage health, meaning that each early detection of food risk found through continuous controls has a public health significance for preservation and promotion of population health in the Republic of Srpska.

We present a calculation of the lattice thermal conductivity of Si-Ge nanowires (NWs), based on solving the Boltzmann transport equation by the Monte Carlo method of sampling the phonon mean free paths. We augment the previous work with the full phonon dispersion and a partially diffuse momentum-dependent specularity model for boundary roughness scattering. We find that phonon flights are comprised of a mix of long free flights over several $\ensuremath{\mu}\mathrm{m}$ interrupted by bursts of short flights, resulting in a heavy-tailed distribution of flight lengths, typically encountered in L\'evy walk dynamics. Consequently, phonon transport in Si-Ge NWs is neither entirely ballistic nor diffusive; instead, it falls into an intermediate regime called superdiffusion where thermal conductivity scales with the length of the NW as $\ensuremath{\kappa}\ensuremath{\propto}{L}^{\ensuremath{\alpha}}$ with the exponent of length dependence $\ensuremath{\alpha}\ensuremath{\approx}0.33$ over a broad range of wire lengths $10\phantom{\rule{4pt}{0ex}}\mathrm{nm}lLl10\phantom{\rule{4pt}{0ex}}\ensuremath{\mu}\mathrm{m}$ regardless of diameter and roughness. We conclude that thermal conductivity in Si-Ge alloy NWs is length dependent up to $10 \ensuremath{\mu}\mathrm{m}$ and therefore can be tuned for thermoelectric applications.

Tartary buckwheat and common buckwheat plants were grown on the field in natural conditions at high elevation. Tartary buckwheat plants were foliarly treated with Se and S (126 μM for each element). Seeds were collected and sown to obtain the progeny of Se-and S- treated plants. Concentration of Se was measured in these plants. Concentration of Se in all plant parts was similar in control and S treated plants. The concentration of Se was the highest in plants from seeds grown on Se treated plants in roots and leaves. It is shown that Se treatments in previous generation affected Se concentration in the progeny of Tartary buckwheat. Results also showed that in untreated plants, Se concentration was higher in Tartary comparing to common buckwheat in roots and seeds.  Key words: Tartary buckwheat, selenium, sulphur Navadna in tatarska ajda sta uspevali na njivi na visoki nadmorski visini. Tatarsko ajdo smo listno skropili s selenom in žveplom (126 μM za vsak element). Na koncu rastne sezone smo na rastlinah zbrali semena in jih naslednje leto posejali. Na ta nacin smo dobili potomce s Se in S obravnavanih rastlin. V teh rastlinah smo merili koncentracijo Se. Koncentracija Se pri tatarski ajdi je bila v vseh rastlinskih delih podobna pri kontrolnih rastlinah in rastlinah, zrastlih iz semen, obravanavanih s S. Najvisjo koncentracijo Se v listih in koreninah so imele rastline, zrasle iz semen, nabranih na rastlinah, listno skropljenih s Se. Rezultati kažejo, da se obravnavanje s Se v prvi generaciji izrazi v vecji koncentraciji Se v potomkah teh rastlin pri tatarski ajdi. Izsledki raziskav so prav tako pokazali, da je koncentracija Se v kontrolnih rastlinah v koreninah in semenih visja pri tatarski ajdi v primerjavi z navadno ajdo.  Kljucne besede: tatarska ajda, selen, žveplo