Logo

Publikacije (37570)

Nazad
M. Sindičić, N. Sinanović, Aleksandra Majić Skrbinšek, Đ. Huber, S. Kunovac, I. Kos

The coal exploitation on the territory of today’s Tuzla basin has lasted from the Austro-Hungarian period onwards. The underground mining gradually became unprofitable and the production in these mines was constantly decreasing. That was the reason why many mines with underground exploitation were closed. The main reasons for that were increasingly unfavorable mining and geological conditions of the exploitation due to the position of the carboniferous layers at increasing depth. This initiated the surface exploitation of coal in the Tuzla basin. This type of coal exploitation started in 1946 in Banovići and Đurđevik basins and in 1967 in the Kreka basin. The exploitation in these basins was organized on several dozens of open pits. Today, exploitation is organized on open pits “Šikulje” and “Dubrave” (Kreka basin), “Potočari” and “Višća” (Đurđevik basin) and “Grivice”, “Turija”, and “Čubrić” (Banovići basin). For comparison, at the beginning of the 1990s there were between 50 and 60 open pits in Scotland, England and Wales and only a few of them are still open (Hughes, Clarke, 2002). Since 1950, in the Rhine carboniferous basin the number of open pits has decreased from 22 to 5, while, in the same period, coal production has been increased by 100 percent (Goedecke, 1978). The above mentioned mining investment projects Abstract

M. Rifatbegović, P. Assunção, Š. Pašić, C. D. L. Fe, J. Poveda

Mycoplasma bovis is a serious, worldwide-spread but often overlooked pathogen causing respiratory disease, mastitis, and arthritis in cattle. In this study we characterize the protein and antigenic profiles of M. bovis field strains isolated in Bosnia and Herzegovina by sodium dodecyl sulphate polyacrylamide gel electrophoresis and immunoblotting, and analyze possible variations among these strains. Greater differences occurred when comparing field strains with the reference strain PG45. One field strain isolated from lung samples of a heifer was markedly different from strains isolated from nasal swabs taken from cattle raised in another geographic region. A possible correlation may exist between protein and antigen profiles of M. bovis field strains, geographic regions and anatomical sites of isolation. Mycoplasma bovis, cattle, antigen, immunoblotting, protein, SDS-PAGE Mycoplasma bovis is the most pathogenic bovine mycoplasma in the parts of the world considered to be free of contagious bovine pleuropneumonia. This pathogen primarily causes calf pneumonia, mastitis and arthritis. Other symptoms are seen less frequently. Diseases caused by M. bovis are found worldwide, causing significant economic losses. Yet, there are no effective control measures or standard protocols for their routine application available (Nicholas and Ayling 2003). Although M. bovis, like other mycoplasmas, possesses a small genome size, it is still highly invasive and able to colonize organ systems. It is now clear that one of the possible explanations for its ability to avoid bodily defence mechanisms and adapt to different environments in the host is due to phenotypic variations in mycoplasmas (Wise 1993; Razin et al. 1998; Minion 2002). Rosengarten et al. (1994) demonstrated highly variable membrane surface proteins (Vsps) of M. bovis which represent a family of antigenically and structurally related lipoproteins. These Vsps represent the predominant antigens recognized by the host immune response during infection, and they can undergo high frequency changes in size and expression. This system is responsible for the survival of these pathogens in the presence of cytolytic antibodies and for their adaptation to specialized environments within their respective hosts (Behrens et al. 1994; Razin et al.1998). A full understanding of phenotypic variation among M. bovis strains should be of great value when developing diagnostic methods and vaccines for the control of infections caused by this organism. Recently, M. bovis has been isolated, for the first time, in Bosnia and Herzegovina (Rifatbegovic et al. 2007). The aim of this study was to characterize the protein and antigenic profile of these M. bovis field strains by SDS-PAGE (sodium dodecyl sulphatepolyacrylamide gel electrophoresis) and immunoblot and to analyze possible variations among these strains.

V. Lipovac, V. Batos, B. Nemsic

In this paper, a solution is proposed for testing TCP congestion window process in a real-life network situation during stationary time intervals. With this respect, the architecture of hardware and expert-system-based distributed protocol analysis is presented that we used for data acquisition and testing, conducted on a major network with live traffic (Electronic Financial Transactions data transfer), as well as the appropriate algorithm for estimating the actual congestion window size from the measured data that mainly included decoding with precise time-stamps (100ns resolution locally and 1ms with GPS clock distribution) and expert-system comments, resulting from the appropriate processing of the network data, accordingly filtered prior to arriving to the special-hardware-based capture buffer. In addition, the paper presents the statistical analysis model that we developed for the evaluation whether the data belonged to the specific (in this case, normal) cumulative distribution function, or whether two data sets exhibit the same statistical distribution - the conditio sine qua non for a TCP-stable interval. Having identified such stationary intervals, it was found that the measured-data-based congestion window values exhibited very good fitting (with satisfactory statistical significance) to the truncated normal distribution. Finally, an appropriate model was developed and applied, for estimating the relevant parameters of the congestion window distribution: its mean value and the variance.

Nema pronađenih rezultata, molimo da izmjenite uslove pretrage i pokušate ponovo!

Pretplatite se na novosti o BH Akademskom Imeniku

Ova stranica koristi kolačiće da bi vam pružila najbolje iskustvo

Saznaj više