381 research outputs found

    Reactivity and function of thiol groups in liver alcohol dehydrogenase

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    Создание монумента «Возрождение крымскотатарского народа» как культурное явление в жизни крымского общества

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    В статье автором охарактеризован градостроительный объект Монумент «Возрождение крымскотатарского народа» как культурное явление в жизни крымского общества, призванное внести вклад в процесс воспитания духовности и культуры в молодых людях.У статті автором охарактеризовано містобудівельний об’єкт Монумент «Відродження кримськотатарського народу» як культурне явище у житті кримського суспільства, що призвание донести внесок у процес виховання духовності та культури молоді.The author describes a monument „Rebirth of the Crimean Tatars” as a cultural phenomenon in the life of the Crimean society, which can contribute in the process of spiritual and cultural upbringing of young people

    Long-term trends in tropical cyclone tracks around Korea and Japan in late summer and early fall

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    This study investigates long-term trends in tropical cyclones (TCs) over the extratropical western North Pacific (WNP) over a period of 35 years (1982-2016). The area analyzed extended across 30-45 degrees N and 120-150 degrees E, including the regions of Korea and Japan that were seriously affected by TCs. The northward migration of TCs over the WNP to the mid-latitudes showed a sharp increase in early fall. In addition, the duration of TCs over the WNP that migrated northwards showed an increase, specifically in early to mid-September. Therefore, more recently, TC tracks have been observed to significantly extend into the mid-latitudes. The recent northward extension of TC tracks over the WNP in early fall was observed to be associated with changes in environmental conditions that were favorable for TC activities, including an increase in sea surface temperature (SST), decrease in vertical wind shear, expansion of subtropical highs, strong easterly steering winds, and an increase in relative vorticity. In contrast, northward migrations of TCs to Korea and Japan showed a decline in late August, because of the presence of unfavorable environmental conditions for TC activities. These changes in environmental conditions, such as SST and vertical wind shear, can be partially associated with the Pacific decadal oscillation

    Mechanisms for slow strengthening in granular materials

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    Several mechanisms cause a granular material to strengthen over time at low applied stress. The strength is determined from the maximum frictional force F_max experienced by a shearing plate in contact with wet or dry granular material after the layer has been at rest for a waiting time \tau. The layer strength increases roughly logarithmically with \tau -only- if a shear stress is applied during the waiting time. The mechanisms of strengthening are investigated by sensitive displacement measurements and by imaging of particle motion in the shear zone. Granular matter can strengthen due to a slow shift in the particle arrangement under shear stress. Humidity also leads to strengthening, but is found not to be its sole cause. In addition to these time dependent effects, the static friction coefficient can also be increased by compaction of the granular material under some circumstances, and by cycling of the applied shear stress.Comment: 21 pages, 11 figures, submitted to Phys. Rev.

    A nonlinear hydrodynamical approach to granular materials

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    We propose a nonlinear hydrodynamical model of granular materials. We show how this model describes the formation of a sand pile from a homogeneous distribution of material under gravity, and then discuss a simulation of a rotating sandpile which shows, in qualitative agreement with experiment, a static and dynamic angle of repose.Comment: 17 pages, 14 figures, RevTeX4; minor changes to wording and some additional discussion. Accepted by Phys. Rev.

    Modal Logics of Topological Relations

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    Logical formalisms for reasoning about relations between spatial regions play a fundamental role in geographical information systems, spatial and constraint databases, and spatial reasoning in AI. In analogy with Halpern and Shoham's modal logic of time intervals based on the Allen relations, we introduce a family of modal logics equipped with eight modal operators that are interpreted by the Egenhofer-Franzosa (or RCC8) relations between regions in topological spaces such as the real plane. We investigate the expressive power and computational complexity of logics obtained in this way. It turns out that our modal logics have the same expressive power as the two-variable fragment of first-order logic, but are exponentially less succinct. The complexity ranges from (undecidable and) recursively enumerable to highly undecidable, where the recursively enumerable logics are obtained by considering substructures of structures induced by topological spaces. As our undecidability results also capture logics based on the real line, they improve upon undecidability results for interval temporal logics by Halpern and Shoham. We also analyze modal logics based on the five RCC5 relations, with similar results regarding the expressive power, but weaker results regarding the complexity

    Exceptionally Slow Rise in Differential Reflectivity Spectra of Excitons in GaN: Effect of Excitation-induced Dephasing

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    Femtosecond pump-probe (PP) differential reflectivity spectroscopy (DRS) and four-wave mixing (FWM) experiments were performed simultaneously to study the initial temporal dynamics of the exciton line-shapes in GaN epilayers. Beats between the A-B excitons were found \textit{only for positive time delay} in both PP and FWM experiments. The rise time at negative time delay for the differential reflection spectra was much slower than the FWM signal or PP differential transmission spectroscopy (DTS) at the exciton resonance. A numerical solution of a six band semiconductor Bloch equation model including nonlinearities at the Hartree-Fock level shows that this slow rise in the DRS results from excitation induced dephasing (EID), that is, the strong density dependence of the dephasing time which changes with the laser excitation energy.Comment: 8 figure

    The Intentional Use of Service Recovery Strategies to Influence Consumer Emotion, Cognition and Behaviour

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    Service recovery strategies have been identified as a critical factor in the success of. service organizations. This study develops a conceptual frame work to investigate how specific service recovery strategies influence the emotional, cognitive and negative behavioural responses of . consumers., as well as how emotion and cognition influence negative behavior. Understanding the impact of specific service recovery strategies will allow service providers' to more deliberately and intentionally engage in strategies that result in positive organizational outcomes. This study was conducted using a 2 x 2 between-subjects quasi-experimental design. The results suggest that service recovery has a significant impact on emotion, cognition and negative behavior. Similarly, satisfaction, negative emotion and positive emotion all influence negative behavior but distributive justice has no effect

    Етнологія релігії – актуальна сфера українського релігієзнавства

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    Background: Inhaled long-acting beta-2-adrenoceptor agonists (LABA) are frequently used in patients suffering from asthma and chronic obstructive pulmonary disease (COPD). For evaluation of real-life data, drug consumption studies are needed but results might be widely influenced due to methodological differences in particular regarding inter-country comparisons. Objectives: This study aims to compare the LABA prescribing in the general population and specifically in patients suffering from asthma and/or COPD in five European countries. Methods: Crude and age- and sex-standardized (European 2008 reference population) annual period prevalence rates per 10,000 persons were calculated for the period 2002-2009 based on seven European electronic health record databases (Denmark, Germany, Spain, the Netherlands (2), and the United Kingdom (2)). Stratification by sex, age, and indication were performed for the annual period prevalence rates. Results: In all databases, we observed an increase in LABA prescriptions during the study period for the general population and for patients suffering from asthma and/or COPD. In 2008, the highest standardized period prevalence was observed in the Dutch Mondriaan-AHC and the Spanish BIFAP database (443.3 and 395.5 per 10,000 persons), and the lowest in the German Bavarian Claims and Dutch Mondriaan- NPRCD database (278.7 and 290.6 per 10,000 persons). Prevalence rates for LABA increased with age and were highest in patients over 70 years. Patients with a combined diagnosis of asthma and COPD had higher prevalence rates of LABA compared to patients with a single diagnosis of asthma or COPD. The proportion of patients with one inhaled LABA prescription only ranged from 14% (UK databases) to 35% (Spanish BIFAP database) in 2008 in the general population. Conclusions: By using a standardized protocol, we demonstrated inter- and intra-country differences in LABA prescriptions. A general increase of LABA prescriptions during the study period was observed in all databases
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