Negative magneto-resistance of electron gas in a quantum well with parabolic potential

We have studied the electrical conductivity of the electron gas in parallel electric and magnetic fields directed along the plane of a parabolic quantum well (across the profile of the potential). We found a general expression for the electrical conductivity applicable for any magnitudes of the magnetic field and the degree of degeneration of the electron gas. A new mechanism of generation of the negative magnetoresistance has been revealed. It has been shown that in a parabolic quantum well with a non-degenerated electron gas the negative magnetoresistance results from spin splitting of the levels of the size quantization.Comment: 15 pages, 3 figure

dReDBox: Materializing a full-stack rack-scale system prototype of a next-generation disaggregated datacenter

Current datacenters are based on server machines, whose mainboard and hardware components form the baseline, monolithic building block that the rest of the system software, middleware and application stack are built upon. This leads to the following limitations: (a) resource proportionality of a multi-tray system is bounded by the basic building block (mainboard), (b) resource allocation to processes or virtual machines (VMs) is bounded by the available resources within the boundary of the mainboard, leading to spare resource fragmentation and inefficiencies, and (c) upgrades must be applied to each and every server even when only a specific component needs to be upgraded. The dRedBox project (Disaggregated Recursive Datacentre-in-a-Box) addresses the above limitations, and proposes the next generation, low-power, across form-factor datacenters, departing from the paradigm of the mainboard-as-a-unit and enabling the creation of function-block-as-a-unit. Hardware-level disaggregation and software-defined wiring of resources is supported by a full-fledged Type-1 hypervisor that can execute commodity virtual machines, which communicate over a low-latency and high-throughput software-defined optical network. To evaluate its novel approach, dRedBox will demonstrate application execution in the domains of network functions virtualization, infrastructure analytics, and real-time video surveillance.This work has been supported in part by EU H2020 ICTproject dRedBox, contract #687632.Peer ReviewedPostprint (author's final draft

Hypergeometric expansions of solutions of the degenerating model parabolic equations of the third order

In investigation of boundary-value problems for certain partial differential equations arising in applied mathematics, we often need to study the solution of a system of partial differential equations satisfied by hypergeometric functions and find explicit linearly independent solutions for the system. In this investigation, we construct special solutions for a certain class of degenerating differential equations of parabolic type of a high order. These special solutions are expressed in terms of hypergeometric functions of one variable

Использование бактериальных препаратов при пастереллезной инфекции

The using of antibiotics and antimicrobials drugs without control may leads to the development of numerous complications and resistance of microorganisms to antibiotics. The using of antibiotics and antimicrobials drugs should are controlled on farms. That is why the monitoring and determination of sensitivity of bacterial diseases agents to antimicrobial drugs are very important. Results of pasterella, of salmonellas’ and kolibakterias’ monitoring in farms of Azerbaijan are introduced in the article. The studies were conducted on the basis of the department for quality control of biological preparations of the Azerbaijan Scientific Research Institute. Sampling for microbiological studies was carried out on farms from pathological material and premises where livestock of different age groups are kept. At the same time, the spread of the disease, incidence, mortality, mortality, age-related features, economic losses caused by bacterial pathogens were taken into account. Inoculations from samples of bone, brain, heart, liver, spleen, and lymph nodes were performed on simple and selective and differential diagnostic nutrient media. The results were read visually. Antibiotic sensitivity was determined by agar disco-diffusion method. Microbiological monitoring of a number of farms in Azerbaijan has shown that agents of bacterial diseases’ are widely spread. Between the isolated pasterella agent largest number were accounted for Salmonella (54.1%) and the Escherichia (30.8 per cent). The rest (15.1%) were isolated cultures of Proteus, Pseudomonas, Klebsiella, Salmonella, Campylobacteria, Enterobacteria, and Clostridia Citrobacter. This indicates that systematic control over the availability of the causative agents of bacterial infections in all critical points of farms is very necessary. Among isolates that were isolated from ill calves and objects, differences in their sensitivity to antimicrobial agents from active substances that officially have registered in our country were discovered. Bactericidal activity of relatively isolated cultures was showed by oxitetraciklin, colistin, ftorfenicol, zeftiocur, doxicyclin, enroxil and sarafloxacin.В статье приведены результаты мониторинга возбудителей бактериальных инфекций, выделенных у телят, павших от пастереллеза в хозяйствах Азербайджана. Исследования проводились на базе отдела по контролю качества биологических препаратов Азербайджанского научно-исследовательского института. Отбор проб для микробиологических исследований проводили в хозяйствах из патологического материала и помещений, где содержится скот разных возрастных групп. При этом учитывали распространение болезни, заболеваемость, смертность, летальность, возрастные особенности, экономические убытки, причиненные бактериальными возбудителями. Посевы из проб костного, мозга, сердца, печени, селезенки, лимфатических узлов проводили на простые и селективные и дифференциально-диагностические питательные среды. Результаты считывали визуально. Чувствительность к антибиотикам определяли диско-диффузным методом в агар. Микробиологический мониторинг животноводческих хозяйств Азербайджана свидетельствует, что возбудители болезней бактериальной этиологии широко распространены. Среди изолированной микрофлоры наряду с пастереллами, наибольшее количество составляли сальмонеллы (54,1%) и эшерихии (30,8%). Остальные (15,1%) изолированные микроорганизмы – это культуры протея, синегнойной палочки, клебсиелл, иерсиний, кампилобактеров, энтеробактерий, цитробактеры и клостридий. Это указывает на необходимость систематического контроля возбудителей бактериальных инфекций в животноводческих хозяйствах. Между изолятами, выделенных от павших животных, обнаружили различия в их чувствительности к противомикробным средствам из числа химиотерапевтических средств, официально зарегистрированных в нашей стране. Бактерицидную активность относительно изолированных культур обнаружил к окситетрациклину, колистину, фторфениколю, цефтиокуру, доксоциклину, энроксилу и сарафлоксацину. На основе полученных данных будет разработана фармако-токсикологическая оценка химиотерапевтических препаратов для профилактики бактериальных инфекций телят

Использование бактериальных препаратов при пастереллезной инфекции

The using of antibiotics and antimicrobials drugs without control may lead to the development of numerous complications and resistance of microorganisms to antibiotics. The using of antibiotics and antimicrobials drugs should be controlled on farms. Owing to this the monitoring and determination of sensitivity of bacterial diseases agents to antimicrobial drugs are very important. Results of pasterella, of salmonellas’ and kolibakterias’ monitoring in farms of Azerbaijan are introduced in the article. Microbiological monitoring of a number of farms in Azerbaijan has shown that agents of bacterial diseases’ are widely spread. Between the isolated pasterella agent largest number were accounted for Salmonella (54.1%) and the Escherichia (30.8 per cent). The rest (15.1%) were isolated cultures of Proteus, Pseudomonas, Klebsiella, Salmonella, Campylobacteria, Enterobacteria, and Clostridia Citrobacter. This indicates that systematic control over the availability of the causative agents of bacterial infections in all critical points of farms is very necessary. Among isolates that were isolated from ill calves and objects, differences in their sensitivity to antimicrobial agents from active substances that officially have registered in our country were discovered. Bactericidal activity of relatively isolated cultures was showed by oxitetraciklin, colistin, ftorfenicol, zeftiocur, doxicyclin, enroxil and sarafloxacin.В статье приведены результаты мониторинга возбудителей бактериальных инфекций, выделенных у телят, павших от пастереллеза в хозяйствах Азербайджана. Микробиологический мониторинг животноводческих хозяйств Азербайджана свидетельствует, что возбудители болезней бактериальной этиологии широко распространены. Среди изолированной микрофлоры, наряду с пастереллами, наибольшее количество составляли сальмонеллы (54,1%) и эшерихии (30,8%). Остальные (15,1%) изолированные микроорганизмы – это культуры протея, синегнойной палочки, клебсиелл, иерсиний, кампилобактеров, энтеробактерий, цитробактеры и клостридий. Это указывает на необходимость систематического контроля возбудителей бактериальных инфекций в животноводческих хозяйствах. Между изолятами, выделенными от павших животных, обнаружили различия в их чувствительности к противомикробным средствам из числа химиотерапевтических средств, официально зарегистрированных в нашей стране. Бактерицидную активность относительно изолированных культур обнаружил к окситетрациклину, колистину, фторфениколю, цефтиокуру, доксоциклину, энроксилу и сарафлоксацину. На основе полученных данных будет разработана фармако-токсикологическая оценка химиотерапевтических препаратов для профилактики бактериальных инфекций телят

On a boundary-value problem in a bounded domain for a time-fractional diffusion equation with the Prabhakar fractional derivative

We aim to study a unique solvability of a boundary-value problem for a time-fractional diffusion equation involving the Prabhakar fractional derivative in a Caputo sense in a bounded domain. We use the method of separation of variables and in time-variable, we obtain the Cauchy problem for a fractional differential equation with the Prabhakar derivative. Solution of this Cauchy problem we represent via Mittag-Leffler type function of two variables. Using the new integral representation of this two-variable Mittag-Leffler type function, we obtained the required estimate, which allows us to prove uniform convergence of the infinite series form of the solution for the considered problem