An exploratory study of heavy domain wall fermions on the lattice

We report on an exploratory study of domain wall fermions (DWF) as a lattice regularisation for heavy quarks. Within the framework of quenched QCD with the tree-level improved Symanzik gauge action we identify the DWF parameters which minimise discretisation effects. We find the corresponding effective 4$d$ overlap operator to be exponentially local, independent of the quark mass. We determine a maximum bare heavy quark mass of $am_h\approx 0.4$, below which the approximate chiral symmetry and O(a)-improvement of DWF are sustained. This threshold appears to be largely independent of the lattice spacing. Based on these findings, we carried out a detailed scaling study for the heavy-strange meson dispersion relation and decay constant on four ensembles with lattice spacings in the range $2.0-5.7\,\mathrm{GeV}$. We observe very mild $a^2$ scaling towards the continuum limit. Our findings establish a sound basis for heavy DWF in dynamical simulations of lattice QCD with relevance to Standard Model phenomenology.Comment: 23 pages, 8 figure

Toxicological analysis of the risk of lead exposure in metal processing

Purpose: To evaluate toxicological risks for workers who are exposed to lead in their work environment. Methods: Since it is an important indicator of toxicological risk, a statistical analysis of lead concentration and biological lead toxicity markers in blood and urine were performed for both exposed and control groups. Both experimental groups consisted of employees from "NISSAL" JSC factory. Analytical epidemiological method in the form of a retrospective cohort study was applied, and covered the period from 2001 to 2010. The concentration of lead, δ-aminolevulinic acid, and coproporphyrin in biological samples were determined by spectrophotometric methods. Results: The results showed a high positive correlation between lead concentrations in blood and urine and the length of exposure of the participants (p < 0.01). Also, increase of lead concentration in the biological material significantly increased δ-aminolevulinic acid (p < 0.01) and slightly increased the concentration of coproporphyrin, both of which are important indicators of toxicological risk. Conclusion: The control group of employees belonged to the normal risk category, while the exposed group belonged to a moderate risk category. Correlation between the monitored parameters is statistically significant at p < 0.01 and p < 0.05. Keywords: Lead, δ-Aminolevulinic acid, Coproporphyrin, Chronic exposure, Toxicity, Correlatio

Crown structure of Picea omorika trees in the plantation

The study was carried out in Serbian spruce (Picea omorika Panč/Purkynĕ) plantations in the western Serbia. The paper presents results of the analysis of crown development. The following elements were analyzed: total tree height, height of the crown base, absolute and relative crown length, maximal crown diameter, coefficient of crown spreading and degree of crown girth. We discuss approaches to the modeling of tree crown growth and development, growing under favorable environmental and stand conditions, without anomalies in development. In order to establish the relationship between analyzed factors, regression analyses were applied. Data fitting was by the analytic method, by the implementation of Prodan’s functions of growth, linear and parabolic function. Received models can be used for the simulation of various growth and developing processes in forest

GALS for Bursty Data Transfer based on Clock Coupling

In this paper we introduce a novel burst-mode GALS technique. The goal of this technique is improving the performance of the GALS approach for systems with predominantly bursty data transfer. This new technique has been used to implement a GALS-based version of a hardware accelerator of a 60 GHz OFDM baseband processor. The simulation results show a significant performance improvement in comparison with a classical implementation of GALS using pausible clocking. © 2009 Elsevier B.V. All rights reserved

GALS for Bursty Data Transfer based on Clock Coupling

In this paper we introduce a novel burst-mode GALS technique. The goal of this technique is improving the performance of the GALS approach for systems with predominantly bursty data transfer. This new technique has been used to implement a GALS-based version of a hardware accelerator of a 60 GHz OFDM baseband processor. The simulation results show a significant performance improvement in comparison with a classical implementation of GALS using pausible clocking. © 2009 Elsevier B.V. All rights reserved

Vibrational level population of H2_2 and H2+_2^+ in the early Universe

We formulate a vibrationally resolved kinetics for molecular hydrogen and its cation in the primordial Universe chemistry. Formation, destruction and relaxation processes for each vibrational level are studied and included as chemical pathways of the present model. The fractional abundance of each vibrational level as a function of the redshift is given: a strong deviation from the Boltzmann distribution is found at low $z$. A discussion of the results is provided, also evaluating the effects of relaxation processes on the level populations. Analytical fits for some LTE rate coefficients are given in the Appendix.Comment: 12 pages, 14 figures, 3 tables; published on ApJS 2011, 193,

The influence of diazinon and its metabolites on acetylcholinesterase, NA+/K+-ATPase and antioxidant enzymes in rat brain synaptosomes

The aim of this study was to investigate neurotoxic potential and oxidative stress responses of diazinon and its metabolites, diazoxon and 2-isopropyl-6-methyl-4-pyrimidinol using synaptosomes as a model system. Synaptosomes were isolated from the brain of Wistar albino rats and incubated at 37oC for 1 hour in the presence of selected concentrations of the investigated compounds. Acetylcholinesterase, Na+/K+-ATPase and antioxidant enzymes activities were determined by standard spectrophotometric methods. Diazinon induced concentration-dependent acetylcholinesterase and Na+/K+-ATPase inhibition, while the activity of catalase, superoxide dismutase and glutathione peroxidase was not significantly affected. Increasing concentrations of diazoxon, oxo analog of diazinon, caused almost complete acetylcholinesterase and Na+/K+-ATPase inhibition, and activated antioxidant enzymes: catalase (up to 25%), superoxide dismutase (up to 55%) and glutathione peroxidase (up to 30%). Unlike diazoxon, diazinon hydrolysis product, 2-isopropyl-6-methyl-4-pyrimidinol did not remarkably change the activities of the investigated enzymes, except superoxide dismutase that was stimulated up to 25%. The obtained results suggest that neurotoxic and prooxidative potential of diazinon, thioorganophoshate used as a commercial insecticide preparation, significantly reinforces mostly due to its transformation to diazoxon in the metabolic pathways.Third International Conferenceon Radiation and Applications in Various Fields of Research, RAD 2015, June8-12, 2015, Budva, Montenegr

Compulsory health insurance and instruments of its financing in Republic of Serbia

Право на здравствено осигурање представља једно од основних људских права. Систем здравствене заштите ни у ком случају не може изаћи у сусрет свим жељама и потребама пацијената, зато што жеље и потребе пацијената имају стални раст, здравствене услуге постају све скупље, а средстава за финансирање истих је све мање. Пацијенти захтевају и заштиту финансијског ризика од скупих здравствених услуга, односно желе да буду сигурни да ће фондови здравственог осигурања, на основу прикупљених средстава, покрити високе трошкове лечења, уколико се за тим јави потреба услед неке теже болести. Буџетско финансирање не пружа стимулацију у раду лекара и даје лошији квалитет здравствених услуга. Принцип солидарности у систему здравствене заштите, пре свега, зависи од расположивих средстава и одлуке владе везано за расподелу средстава према здравственим установама. С једне стране, овакав систем у данашњим условима отежано функционише, док, с друге стране, систем здравствене заштите одређене земље прати њен развој, те отуда мора одговорити на нове изазове. Циљ докторске дисертације јесте идентификовање и анализа битних елемената система здравствене заштите, његово финансирање, остваривања права из обавезног здравственог осигурања, приказ упоредних решења из искустава других земаља и указивање на недостатке сваког од модела здравствене заштите. Циљ је и да се прикаже да комбиновани систем финансирања (капитација комбинована са плаћањем по услузи и дијагностички сродне групе) обезбеђује повећање физичке и ефективне доступности здравствене заштите за све грађане Србије, доводи до унапређења квалитета здравствене заштите, као и до повећања ефективности и ефикасности у пружању здравствених услуга. Један од циљева рада јесте да покаже да је комбиновани систем финансијски одржив, из разлога што не зависи само од буџетских средстава и да су у таквом систему грађани заштићени од финансијског ризика везаног за здравље, тј. пацијенти не морају да буду у страху да ли ће, услед тешких болести и скупих медицинских процедура, систем покрити високе трошкове њиховог лечења. У комбинованом систему сами даваоци здравствених услуга добрим делом утичу на расподелу прихода, чиме се обезбеђује и стабилност у пружању здравствене заштите.The right to health insurance represents one of basic human rights. The system of health care in any case can`t meet all the wants and needs of the patients because the needs and wants of the patients have a continuous growth, the health institutions become more expensive and the means of financing are becoming smaller. Patients also demand protection from financial risk from expensive health services, with respect to being sure that the health insurance funds, based on the gathered means, cover high costs of treatment, in case a need for it arises due to a serious illness. Budget financing doesn’t provide a stimulus in the doctors’ work and provides a lower quality of heath services. The principle of solidarity in the system of health services, primarily depends on the available means and the governmental decision with regards to the division of means towards the health institutions. On one hand, the system in today’s conditions functions with difficulty while on the other hand, the system of health care of a specific country follows the development, hence needs to respond to new challenges. The purpose of the doctorate dissertation is identification and analysis of important elements of the health insurance system, its financing, relization of mandatory health insurance, showcase of alternate solutions from experience of other countries and exposing the shortcomings of each model of health care. The aim is to show a combined system of financing (capitation combined with paying per service and diagnostic groups) ensures an increase of physical and effective availability of health care for all citizens of Serbia, leading to an advance of quality of health care as an increase of effectiveness and efficiency in providing health services. One of the objectives of the piece is to show that the combined system is financially sustainable, due to it not being dependent on budget allocation and that in such a system the citizens are protected from financial risk related to health i.e. pateient do not have to fear if, in case of serious illness and expensive medical procedures, the system can cover the high expenses of their treatment. In a combined system the providers of heath services significantly effect the division of revenue, which ensures stability in providing health care. During the making of the dissertation, methods were used which are adapted to the problems of the research including: comparative law method, deductive method based on the method of abstraction, which is already developed in the analysis of parallel systems of health insurance in the world and the statistical method. Comparative law analysis is carried out, beginning with the health care system and health insurance of countries whose solutions are characteristic and, as such, functional (Germany, United Kingdom and United States of America), concluded with health systems of countries with which Serbia shares cultural, economic, political and social heritage (Croatia and Slovenia). Besides analysis of the mentioned countries, analysis of the system of Czechoslovakia, because in an earlier period this country had a socially-political arrangement similar to Serbia after World War II. Also, an inductive method was used, which assumes an immediate insight into appropriate data and statistical analysis of documentation. Among used methods, special attention was given was to exemplary analysis of problems of public financing and methods of normative analysis during researching legal solutions in the area. For the analysis of financial indicators of health institutions tertiary health care used the method of deduction, induction methods, methods of analysis and comparison method, to perform the appropriate conclusions