Investigation of the polycrystalline solar modules energy efficiency in relation to their tilt angle and geographical orientation in the real meteorological conditions are presented in this paper. The experimental system comprises five polycrystalline silicon modules, with single power 50 Wp, three of which are placed vertically and oriented towards the East, South and West, respectively, the fourth is horizontal, while the fifth is oriented toward the South at the angle of 33º (optimally inclined solar module). The measurement period was from 01 August to 01 December, 2014. The optimally inclined solar module generated the most of total monthly energy for all four months. The most of total monthly energy was generated in August, by the optimally inclined solar module (6.07 kWh), horizontal solar module (5.69 kWh), the vertical solar module oriented toward the East (2.42 kWh) and the vertical solar module oriented toward the West (2.52 kWh), respectively. Energy efficiency of optimally inclined solar module for the entire measurement period was 14.27%, 11.41% for the horizontal, 10.37% for the South, 5.79% for the East and 5.23% for the West module. The obtained results can be used in modern architecture, for the application of the solar modules as roof and façade elements.

Energy stability and security have become one of the most important issues in recent years on planet Earth. Nowadays, worldwide economic, industrial and social development is related to the energy and energy-system that provided great benefits to a society, but the society is paying a high price because of the production and emission of carbon dioxide and other greenhouse gases into the atmosphere. There are numerous climate changes, which pose a threat to each continent, disorder in agriculture, disorder in food production, floods and fires, as well as changes in the ecosystem. Energy stability and security have become one of the most important issues in recent years. Energy is essential for development of any country, notably when it comes to its industry and economy. Without adequate policy operations of the energy sector, it is not possible to achieve industrial or economic progress. Nevertheless, no matter how important energy is for the development, it is only a mechanism for achieving the ultimate goals – sustainable economy, clean environment, high standard of living, prosperity and health of the population. This paper elaborates on and outlines a strategy for energy development of renewable energy sources in the world, as well as in the European Union. It presents in great details the application of new technologies that have led to the development of renewable energy sources: wind-power, solar energy, small hydro power plants, biomass, and their increase in the overall participation of energy production and reduction of fossil fuels in energy production. Investing in new technologies which use renewable energy sources have led to the increase in employment in the world, so that about 6.5 million people in the world have been employed until today. This paper outlines the trend of increasing energy production from RES (renewable energy sources) by investing in any of the abovementioned energy sources, as well as employment for each energy source in the world and the EU-28. Also, the development of renewable energy sources in the future has been presented.

In this article, we are initiating the hypothesis that improvements in short term energy load forecasting may rely on inclusion of data from new information sources generated outside the power grid and weather related systems. Other relevant domains of data include scheduled activities on a grid, large events and conventions in the area, equipment duty cycle schedule, data from call centers, real-time traffic, Facebook, Twitter, and other social networks feeds, and variety of city or region websites. All these distributed data sources pose information collection, integration and analysis challenges. Our approach is concentrated on complex non-cyclic events detection where detected events have a human crowd magnitude that is influencing power requirements. The proposed methodology deals with computation, transformation, modeling, and patterns detection over large volumes of partially ordered, internet based streaming multimedia signals or text messages. We are claiming that traditional approaches can be complemented and enhanced by new streaming data inclusion and analyses, where complex event detection combined with Webbased technologies improves short term load forecasting. Some preliminary experimental results, using Gowalla social network dataset, confirmed our hypothesis as a proof-of-concept, and they paved the way for further improvements by giving new dimensions of short term load forecasting process in a smart grid.

Sažetak: Jezero Modrac predstavlja hidroakumulaciju koja služi za snadbijevanje gradova Tuzle i Lukavca pitkom vodom kao i za obezbjeđivanje vode za industrijska postrojenja. Ovo jezero je najveći vodoprivredni objekat ove vrste u Bosni i Hercegovini. Poplave koje su 2014. godine, pogodile Bosnu i Hercegovinu, odnijele su ljudske živote, nanijele velike štete i izazvale ogromne gubitke na infrastrukturnim objektima, poljoprivredi i stočarstvu. Osnovni cilj ovog rada je da se izvrši analiza fizičko-hemijskih parametara vode jezera Modrac nakon poplava te da se na osnovu dobivenih vrijednosti parametara izvrši procjena uticaja vremenskih nepogoda na isto. Uzorci uzeti u septembru 2014. godine analizirani su brojnim fizikalno-hemijskim metodama a dobiveni rezultati u odnosu na analize sprovedene u periodu prije poplava jasno ukazuju na određeni stepen kontaminacije vodenog ekosistema jezera Modrac. Ključne riječi: Jezero Modrac, voda, poplave u BiH, kontaminacija, fizičko-hemijski parametri

The dynamic process of the development of the immune system can in itself result in age-related immune malfunctions. In this study, we analysed lymphocyte subsets in the peripheral blood of 60 healthy donors, divided into groups of children, adolescents, and adults, focusing on effector (Teff) and regulatory (Treg) T lymphocytes and STAT1/STAT5 signalling response in helper T lymphocytes (Th) in adults, using flow cytometry. Our results demonstrate a decrease in the percentage of total Tregs and an increase in the percentage of total Teffs with age and a consequential immense increase in the Teff/Treg ratio. The increase of Teffs was most apparent in Th1, Th1Th17, and Th17CD161− subsets. Significant Th lymphocyte STAT1 expression differences were observed between children and adolescents, which were associated with the decrease in activated Tregs. Higher expression of STAT1 was found in FoxP3hi than in FoxP3low Th lymphocytes, while significant IL-2 induced STAT5 phosphorylation differences were found among the subsets of Th lymphocytes in adults. Our study demonstrates age-related changes in circulating Teff and Treg, as well as significant differences in STAT5/STAT1 signalling among FoxP3+ Th lymphocytes, providing new advances in the understanding of immunosenescence.

microRNA是非编码RNA序列，20-22个核苷酸长，其在沉默基因表达中起作用。正常microRNA表达的变化可致癌。本研究阐明了卵巢癌中microRNA的表达与正常表达相比的变化，这样比较可以更好地理解卵巢癌发生。在肿瘤样品中，在680种microRNA类型中230种显示高表达，295种显示低表达，155种为非表达。当我们基于倍数增加>50分类microRNA时，我们发现microRNA有31高表达和89低表达。异常表达的巨大差异显示microRNA活性的变化程度。使用Cancerminer工具我们发现了这些异常表达microRNAs的相应的mRNA目标。我们发现，由数据过程捕获的最多的靶基因与细胞增殖和癌发生有关。

Este artigo resulta de pesquisa do doutorado em educacao e versa sobre a politica de avaliacao institucional na educacao tecnologica pos LDB 9.394/96, situada no macro contexto da Reforma da Educacao Superior. Sob enfoque de pesquisa qualitativa em educacao, com destaque para as pesquisas de cunho documental e oral o presente texto focaliza o Sistema de Avaliacao Institucional das Faculdades de Tecnologia (FATECs) do Centro Estadual de Educacao Tecnologica Paula Souza (CPS), na condicao de autarquia de regime especial responsavel pelo oferecimento da educacao profissional e tecnologica publica no Estado de Sao Paulo. Objetiva apresentar as concepcoes e proposicoes de avaliacao institucional expressas no discurso normativo-institucional do CPS, bem como apresentar a percepcao dos sujeitos escolares sobre os pressupostos, impactos e impasses da politica de avaliacao institucional das Faculdades de Tecnologia, no periodo de 2001 a 2007. O SAI-FATEC demanda um novo aprendizado abarcando construcoes e reconstrucoes, entre proposicoes e criticas na perspectiva de superacao dos impasses. Considera-se que a avaliacao institucional das Faculdades de Tecnologia apresenta-se como um duplo desafio pois se encontra no ponto de interseccao entre a educacao superior e a educacao profissional tecnica de nivel medio (educacao basica) a requerer a analise das politicas publicas para a educacao profissional e tecnologica.