Utjecaj procesa pridruživanja Europskoj uniji na organizacijsku kulturu poduzeća koja posluju u tranzicijskim zemljama

The aim of this research is to reveal the direction of change the cultural dimensions of companies in AP Vojvodina, when the Republic of Serbia – as a country in transition – was being included in the European division of labor. Foreign direct investments from EU countries are used as a method of transposing cultural patterns. The research methodology used here included the application of the Mann Whitney and the Chi square tests to compare the attitudes of the managers of these two groups of companies in AP Vojvodina. The results indicate that there is no statistically significant difference in the attitudes of managers of the two groups of companies, in terms of the questionnaire items that explore the power distance dimension. In AP Vojvodina, masculinity and individualism are still valued to a greater extent by the managers of companies with foreign capital than by those with domestic capital. Managers of the companies with foreign capital show a higher degree of uncertainty avoidance than those with domestic capital, which is contrary to authors’ expectations, though explicable in the context of the recessionary business conditions under which the research was conducted.poduzeća koja posluju u AP Vojvodini, u momentu kada se Republika Srbija – kao tranzicijska zemlja – nalazi u procesu uključivanja u Europsku podjelu rada. Inozemna izravna ulaganja iz zemalja članica EU, služe kao metoda za prenošenja kulturnih obrazaca. Metodologija istraživanja koja je ovdje korištena uključuje primjenu Mann Whitney i hi-kvadrat testova u cilju uspoređivanja stavova menadžera dviju skupina poduzeća u AP Vojvodini. Rezultati pokazuju da ne postoji statistički značajna razlika u stavovima menadžera dvije grupe poduzeća, u odnosu na pitanja koja određuju distancu moći. U AP Vojvodini, rodno muške vrijednosti i individualizam još uvijek su cijenjene u većoj mjeri od strane menadžera poduzeća koja posluju s privatnim kapitalom stranog podrijetla u odnosu na menadžere poduzeća koja posluju s privatnim kapitalom domaćega podrijetla. Menadžeri poduzeća sa stranim kapitalom pokazuju veći stupanj izbjegavanja neizvjesnosti u odnosu na menadžere poduzeća koja posluju s privatnim kapitalom domaćeg podrijetla, što je u suprotnosti s očekivanjima autora, ali se objašnjava recesijskim uvjetima poslovanja pod kojima je provedeno istraživanje

Observatons of NGC 3077 Galaxy in Narrow Band [SII] and H_alpha Filters

We present observations of the HI tidal arm near dwarf galaxy NGC 3077 (member of the M81 galaxy group) in narrow band [SII] and H_alpha filters. Observations were carried out in March 2011 with the 2m RCC telescope at NAO Rozhen, Bulgaria. Our search for possible supernova remnant candidates (identified as sources with enhanced [SII] emission relative to their H_alpha emission) in this region yielded no sources of this kind. Nevertheless, we found a number of objects with significant H_alpha emission that probably represent uncatalogued, low brightness HII regions.Comment: 4 pages, 1 figure, 3 tables, Proceedings of the 8th Serbian Conference on Spectral Line Shapes in Astrophysics, 2011 June 5-10, Divcibare, Serbi

Fuzzy linear programming in investments

The possibility of the investment performances assessment is especially important in the dynamic business conditions. Hence, the appropriate methodology enables an optimal investment decision. The main objective of the research is to test and analyse the possibility of fuzzy linear programming application in the investment processes with special attention to the investment performances. The methodology used in the research understands the methods of analyses and synthesis and also application of the fuzzy linear programming. The quantitative and qualitative results of the research imply that the application of fuzzy linear programming provide important information about the effects from the investment activities

Portfolio optimization in investments : empirical evidence from the Republic of Serbia

The main subject in this study is to test and analyze efficient portfolio optimization in investments with focus on the financial market of the Republic of Serbia. The basic objective of the research is to provide quantitative information about specific aspects of portfolio optimization in investments, especially having in mind the specificities of the financial market of the Republic of Serbia. The methodology used in the research includes quantitative methods in area of portfolio optimization. The results of the research point to the necessity of portfolio optimization in function of return maximization from the investment activities

Efficient management in environmental protection

The subject of this study is to research, analyse and assess the causal relations between efficient management as a useful and necessary "tool" in the daily operations and the modern aspects of environmental protection in contemporary business conditions. The research objective is to achieve the concrete, practically confirmed knowledge of practical, actually usable relation between efficient management and modern aspects and trends of environmental protection. The study methodology includes descriptive and exploratory techniques, as well as analysis and synthesis. The main research hypothesis is that without an efficient management, the optimum approach to the environmental protection cannot be expected nor can an adequate relation towards environment be ensured. The research results provide actual information about the place, role and significance of efficient management in the contemporary environmental protection

Efficient Portfolio Selection and Its Applications to Decision Making

Abstract—Dynamic nature of investment return requires the application of the appropriate methodology, especially regarding enhanced volatility induced by frequent extreme events occurrence. The subject of the research is to analyze the possibility of efficient portfolio selection on the transitional financial market of the Republic of Serbia.  The main objective is to gather empirical evidence about the investment portfolio performance with special attention to the decision making process. The methodology in the research implies the usage of the appropriate portfolio optimization methods. The research results stress the significance of efficient portfolio selection in contemporary business conditions. It can be concluded that it is necessary to examine the volatility of the portfolio assets and thus enabling the efficient portfolio selection, which is especially challenging on transitional markets

Analysis of emloyees awareness of energy costs

In this document analysis of employee awareness about energy costs in companies is given trough tests of questionnaire. There was tree main questions observed about other sources of energy, including fossil fuels and renewable energy as a supplementation and\or replacement for the electric energy. In the conducted research 150 respondent (employees) was included with their opinion about the importance of source of energy related to companies’ energy costs. In this paper relation between companies (employees) with higher energy costs and the level of awareness about different energy source is proven

Improved functionalization of oleic acid-coated iron oxide nanoparticles for biomedical applications

Superparamagnetic iron oxide nanoparticles can providemultiple benefits for biomedical applications in aqueous environments such asmagnetic separation or magnetic resonance imaging. To increase the colloidal stability and allow subsequent reactions, the introduction of hydrophilic functional groups onto the particles’ surface is essential. During this process, the original coating is exchanged by preferably covalently bonded ligands such as trialkoxysilanes. The duration of the silane exchange reaction, which commonly takes more than 24 h, is an important drawback for this approach. In this paper, we present a novel method, which introduces ultrasonication as an energy source to dramatically accelerate this process, resulting in high-quality waterdispersible nanoparticles around 10 nmin size. To prove the generic character, different functional groups were introduced on the surface including polyethylene glycol chains, carboxylic acid, amine, and thiol groups. Their colloidal stability in various aqueous buffer solutions as well as human plasma and serum was investigated to allow implementation in biomedical and sensing applications.status: publishe

Vrste plesni na kukuruznom klipu uskladištenom u koševima na teritoriji opština Vrnjačka Banja i Kruševac

Corn cob owned by individual producers is stored on multiple ways: in barns, attics, sheds etc. If corn cob is not dried properly when stord in barns, it represents ideal foundation for field and storage molds.For our examinations we used corn from 20 barns originating from ten plain and mountain villages in Vrnjacka Banja municipality. Mold isolation was performed on saburo ager on temperature of 27oC. Most commonly isolated sorts of mold were: Penicillium sp., Aspergillus ustus, Alternaria tenuis, Yeast, Mucor mucedo, Fusarium roseum, Aspergillus candidus, Trichoderma viride and Aspergillus flavus. Our results show that dominant role was frequently represented by field molds – Alternaria and Fusarium, most common of storage molds were molds from the genus Aspergillus and Penicillium, and most common progressive decay molds were Mucor and Rhisopos. Infection of grain was by rule 100% with rare exeptions.Kukuruzni klip u vlasništvu individualnih proizvođača skladišti se na više načina: u koševima, tavanima, šupama i dr. Ukoliko se kukuruzni klip, nedovoljno osušen, skladišti u koševe on predstavlja idealnu podlogu za razvoj poljskih i skladišnih plesni. Za ispitivanja smo koristili kukuruz iz 20 koševa koji su poreklom iz 10 sela ravničarskog i planinskog predela sa područja opštine Vrnjačka Banja. Izolaciju plesni vršili smo na Saburo agaru na temperaturi od 27°C. Najčešće su izolovane sledeće vrste plesni: Penicillium sp., Aspergillus ustus, Alternaria tenuis, Kvasnice, Mucor mucedo, Fusarium roseum, Aspergillus candidus, Trichoderma viride i Aspergillus flavus. Naši rezultati pokazuju da su dominantnu ulogu u frekvenciji predstavljale plesni s polja- Alternaria i Fusarium, od plesni uskladištenja najučestalije su bile plesni iz roda Aspergillus i Penicillium, a od plesni uznapredovanog kvarenja Mucor i Rhisopus. Infekcija zrna je bila po pravilu 100% sa retkim odstupanjima

RNAi-Mediated c-Rel Silencing Leads to Apoptosis of B Cell Tumor Cells and Suppresses Antigenic Immune Response In Vivo

c-Rel is a member of the Rel/NF-κB transcription factor family and is predominantly expressed in lymphoid and myeloid cells, playing a critical role in lymphocyte proliferation and survival. Persistent activation of the c-Rel signal transduction pathway is associated with allergies, inflammation, autoimmune diseases, and a variety of human malignancies. To explore the potential of targeting c-Rel as a therapeutic agent for these disorders, we designed a small interfering RNA (siRNA) to silence c-Rel expression in vitro and in vivo. C-Rel-siRNA expression via a retroviral vector in a B cell tumor cell line leads to growth arrest and apoptosis of the tumor cells. Silencing c-Rel in primary B cells in vitro compromises their proliferative and survival response to CD40 activation signals, similar to the impaired response of c-Rel knockout B cells. Most important, in vivo silencing of c-Rel results in significant impairment in T cell-mediated immune responses to antigenic stimulation. Our study thus validates the efficacy of c-Rel-siRNA, and suggests the development of siRNA-based therapy, as well as small molecular inhibitors for the treatment of B cell tumors as well as autoimmune diseases