Delic N.V.,University of Novi Sad |
Setrajcic J.P.,University of Novi Sad |
Setrajcic J.P.,Academy of science and Arts |
Armakovic S.,University of Novi Sad |
And 4 more authors.
Proceedings of the International MultiConference of Engineers and Computer Scientists 2010, IMECS 2010 | Year: 2010
The nonlinearity of free-photon Hamiltonian caused a series of incomplete and insufficiently rigorous approaches in photon analyses. In this work we systematically and without additional assumptions review fundaments of individual photon theory. Those fundaments are: linearized photon Hamiltonian, the Schrödinger equation for photon, and the proof that motion integral of photon is total momentum with arbitrary magnitude of spin. Derivations of Schrödinger equation of photon as well as the determination of motion integral of photon are done for positive sign of square root, since from deriving procedure it was obvious that for negative sign the same result follows.
Zerem E.,Academy of science and Arts
Medicinski glasnik : official publication of the Medical Association of Zenica-Doboj Canton, Bosnia and Herzegovina | Year: 2014
This paper deals with problems of the academic community in Bosnia and Herzegovina. This is a country in transition where a complex interrelation between politics and the academic community negatively impacts functioning of the academic community. Inability to implement internationally recognized criteria in the process of acquisition of scientific and academic titles has been a crucial problem. This paper seeks to identify causes of the community's perplexed state; its failure to carry out the quintessential reforms in higher education based on the implementation of internationally recognised criteria and the lack of responsibility among those who make political decisions, which are important for the development and advancement of the academic community.
Basarac M.,Academy of science and Arts
23rd International Scientific Conference: Wood is Good - With Knowledge and Technology to a Competitive Forestry and Wood Technology Sector, Proceedings | Year: 2012
The main objective of this thesis was to contribute to the analysis of the potential factors of the Croatian wood sector's export dynamics. The analysis of the macroeconomic indicators that influence the export dynamics is of special interest and was examined in numerous public debates. Therefore, a sophisticated econometric approach was required, so export determinants were modified by applying the VAR methodology. Moreover, in this paper we examined the long-term and short-term impact of foreign direct investment, gross investment and the real effective exchange rate on the wood processing sector's export and the future development of this important manufacturing sector. The results of the empirical analysis of the conditional vector error correction model confirm the existence of a cointegrated equation that forms a longterm connection between the said variables. This long-term connection is statistically significant; it indicates that the error correction term is statistically significant and of adequate algebraic sign, pointing to a 69 percent quarterly imbalance correction. The other variables of the conditional model, in the short-term, are not statistically significant. This empirical investigation leads to the conclusion that there exists an export competitiveness problem in Croatia's wood sector, that isn't solvable in the short-term and requires significant investment, but whose return is doubtless.
Agnarsson I.,Academy of science and Arts |
Agnarsson I.,University of Puerto Rico at San Juan |
Agnarsson I.,University of British Columbia |
Maddison W.P.,University of British Columbia |
AvilEs L.,University of British Columbia
Molecular Ecology | Year: 2010
The distribution and quantity of genetic diversity may be profoundly influenced by the emergence and dynamics of social groups. Permanent social living in spiders has resulted in the subdivision of their populations in more or less isolated colony lineages that grow, proliferate and become extinct without mixing with one another. A newly discovered hypervariable mitochondrial DNA region allowed us to examine the fine scale metapopulation structure in the social Anelosimus eximius. We sampled 39 colonies in Ecuador and French Guiana and identified 25 haplotypes. The majority of colonies contained one haplotype. Additional haplotypes occurred in approximately 15% of the colonies, and were always closely related to the common colony haplotype. Our findings confirm that colonies consist of single matrilines, with within-colony variation explained by mutations within the matriline. We thus found no evidence of mixing of matrilines. Likewise, colonies in a cluster often shared a haplotype, implying common colony ancestry. In few cases, however, haplotypes were shared between more distant colonies, providing evidence for occasional longer distance dispersal and/or widespread colony lineages. The geographical localities of colonies were incongruent with phylogenetic trees and haplotype networks, showing that some areas contained two or more matrilines. Hence, females do not migrate into foreign colonies, but faithfully remain within their own colony lineage, even when they disperse into new areas. These results indicate that the fine scale metapopulation structure of pure matrilines is maintained over the long term and that colony turnover is not extensive or radical enough to homogenize entire geographical areas. Genetic diversity is thus preserved to some extent at the metapopulation level. © 2010 Blackwell Publishing Ltd.
Redzic S.,Academy of science and Arts |
Barudanovic S.,University of Sarajevo
Sumarski List | Year: 2010
The peterns of structure and certain parameters of dynamics of forest vegetation have been studied along the vertical profile of the Crvanj Mt. in Hercegovina (from Ulog to Zimomor, i.e. top of mountain Crvanj). The following communities of the forest vegetation are present: Quercetum petraeae- cerris B. Jovanović (1960) 1979 subass. seslerietosum autumnalis subass. nova hoc loco; Lathyro nigeri-Quercetum cerris nomen nov hoc loco (Syn.: Quercetum cerris "mediterraneo-montanum" Lakušić et Kutleša 1977), Aceri-Carpinetum orientalis Blečić et Lakušić 1966 /alliances Quercion petraeae- cerris [(Lakušić 1976) Lakušić et Jovanović 1980] Čarni et al. 2009 and Carpinion orientalis Blečić et Lakušić 1966/; Querco- Carpinetum betuli Horvat 1938 emend Blečić 1958 subass. quercetosum cerris Stefanović 1964 aposeriosum foetidae facies nov. hoc loco (alliance Erythronio-Carpinion (Horvat 1958) Marinček in Mucina et al. 1993; Lathyro verni-Fagetum sylvaticae Redžić 2007 nom. nov (Syn.: Fagetum moesiacae "montanum" Blečić et Lakušić 1970), Seslerio autumnalis-Fagetum sylvaticae Blečić et Lakušić 1970 corr. Redžić & Barudanović hoc loco and Phyteumo spicatae-Fagetum sylvaticae Barudanović 2003 corr. Redžić & Barudanović hoc loco (alliance Seslerio-Fagion sylvaticae nomen nov hoc loco (Syn.: Fagion moesiacae Blečić et Lakušić 1970). All communities are hemicryptophitic and phanerophtic, with certain proportion of geophytes life form. The balkans, dinaric and SE Europe floral elements are with high proportion and differentiate of those forest communites from similar forest vegetation in other Dinaric Alps region.