In Memoriam. Пенка Димитрова Филкова (1929-2007)

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Check-list of European Orthoptera

List of all 974 recognized species of Ensifera (Tettigonioidea: 458, Rhaphidophoroidea: 44, Grylloidea: 91) and Caelifera (Tetrigoidea: 12, Tridactyloidea: 6, Acridoidea: 363) in Europe including information about their distribution.Aufstellung aller 974 derzeitig anerkannten Arten der Ensifera (Tettigonioidea: 458, Rhaphidophoroidea: 44, Grylloidea: 91) and Caelifera (Tetrigoidea: 12, Tridactyloidea: 6, Acridoidea: 363) in Europa mit Angabe der Verbreitungsgebiete

Возможности магнитного резонанса в визуализации коллатерального кровообращения

В роботі висвітлено переваги операторо-незалежного методу МРТ та його методики МРА в досліджені колатерального кровообігу при судинній патології. Проведено обстеження 100 хворих віком від 30 до 60 років. Результати діагностики представлені на знімках.Privilege of operator-independent method of MRI and MRA methodic in the investigation of collateral blood flow at vascular pathology are presented in the article. There were examined 100 patients in the age of 30 up to 60 years. Results of diagnostics are showed on the scans.В статье освещены преимущества оператор-независимого метода МРТ и его методики МРА в диагностике коллатерального кровообращения при сосудистой патологии. Обследованы 100 пациентов в возрасте от 30 до 60 лет. Результаты диагностики представлены на сканах

312 MAX Phases: Elastic Properties and Lithiation

Interest in the Mn+1AXn phases (M = early transition metal; A = group 13–16 elements, and X = C or N) is driven by their ceramic and metallic properties, which make them attractive candidates for numerous applications. In the present study, we use the density functional theory to calculate the elastic properties and the incorporation of lithium atoms in the 312 MAX phases. It is shown that the energy to incorporate one Li atom in Mo3SiC2, Hf3AlC2, Zr3AlC2, and Zr3SiC2 is particularly low, and thus, theoretically, these materials should be considered for battery applications

Применение магнитного резонанса в определении артериальных аневризм у особ молодого возраста

В роботі висвітлені переваги оператор-незалежного методу МРТ та його методики МРА в визначенні артеріальних аневризм. Проведено обстеження 30 хворих віком від 20 до 45 років. Результати діагностики представлені на сканах.Privilege of operator-independent method of MRI and MRA methodic in the investigation of arterial aneurysms at vascular pathology are presented in the article. There were examined 30 patients in the age of 20 up to 45 years. Results of diagnostics are showed on the scan.В работе освещены преимущества оператор-независимого метода МРТ и его методики МРА в определении артериальных аневризм. Проведено обследование 30 больных возраста от 20 до 45 лет. Результаты диагностики представлены на сканах

Сергею Ивановичу Влахову 90 лет

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The influence of surface energy on the self-cleaning of insect adhesive devices

The ability of insects to adhere to surfaces is facilitated by the use of adhesive organs found on the terminal leg segments. These adhesive pads are inherently 'tacky' and are expected to be subject to contamination by particulates, leading to loss of function. Here, we investigated the self-cleaning of ants and beetles by comparing the abilities of both hairy and smooth pad forms to selfclean on both high and low energy surfaces after being fouled with microspheres of two sizes and surface energies. We focused on the time taken to regain adhesive potential in unrestrained Hymenopterans (Polyrhachis dives and Myrmica scabrinodis) and Coccinellids (Harmonia axyridis and Adalia bipunctata) fouled with microspheres. We found that the reattainment of adhesion is influenced by particle type and size in Hymenopterans, with an interaction between the surface energy of the contaminating particle and substrate. In Coccinellids, reattainment of adhesion was only influenced by particle size and substrate properties. The adhesive organs of Coccinellids appear to possess superior self-cleaning abilities compared with those of Hymenopterans, although Hymenopterans exhibit better adhesion to both surface types. © 2012. Published by The Company of Biologists Ltd

High-pressure structural, elastic and electronic properties of the scintillator host material, KMgF_3

The high-pressure structural behaviour of the fluoroperovskite KMgF_3 is investigated by theory and experiment. Density functional calculations were performed within the local density approximation and the generalized gradient approximation for exchange and correlation effects, as implemented within the full-potential linear muffin-tin orbital method. In situ high-pressure powder x-ray diffraction experiments were performed up to a maximum pressure of 40 GPa using synchrotron radiation. We find that the cubic Pm\bar{3}m crystal symmetry persists throughout the pressure range studied. The calculated ground state properties -- the equilibrium lattice constant, bulk modulus and elastic constants -- are in good agreement with experimental results. By analyzing the ratio between the bulk and shear modulii, we conclude that KMgF_3 is brittle in nature. Under ambient conditions, KMgF_3 is found to be an indirect gap insulator with the gap increasing under pressure.Comment: 4 figure

Density functional study of elastic and vibrational properties of the Heusler-type alloys Fe2_2VAl and Fe2_2VGa

The structural and elastic properties as well as phonon-dispersion relations of the Heusler-type alloys Fe$_2$VAl and Fe$_2$VGa are computed using density-functional and density-functional perturbation theory within the generalized-gradient approximation. The calculated equilibrium lattice constants agree well with the experimental values. The elastic constants of Fe$_2$VAl and Fe$_2$VGa are predicted for the first time. From the elastic constants the shear modulus, Young's modulus, Poisson's ratio, sound velocities and Debye temperatures are obtained. By analyzing the ratio between the bulk and shear modulii, we conclude that both Fe$_2$VAl and Fe$_2$VGa are brittle in nature. The computed phonon-dispersion relation shows that both compounds are dynamically stable in the L1$_2$ structure without any imaginary phonon frequencies. The isomer shifts of Fe in the two compounds are discussed in terms of the Fe s partial density of states, which reveal larger ionicity/less hybridization in Fe$_2$VGa than in Fe$_2$VAl. For the same reason the Cauchy pressure is negative in Fe$_2$VAl but positive in Fe$_2$VGaComment: 14 pages, 3 figure

Применение магнитного резонанса в определении морфологических параметров ангиоархитектоники при сосудистой патологии головного мозга

В роботі висвітлено переваги операторо-незалежного методу МРТ та його методики МРА в дослідженні церебральної ангіоархітектоніки при судинній патології. Проведено обстеження 100 хворих віком від 20 до 45 років. Результати діагностики зведені в таблицю та представлені діаграмою.Privilege of operator-independent method of MRI and MRA methodic in the investigation of cerebral angioarchitectonics at vascular pathology are presented in the article. There were examined 100 patients in the age of 20 up to 45 years. Results of diagnostics are introduced in the table and showed on the chart.В статье освещены преимущества оператор-независимого метода МРТ и его методики МРА в диагностике церебральной ангиоархитектоники при сосудистой патологии. Обследованы 100 пациентов в возрасте от 20 до 45 лет. Результаты диагностики помещены в таблице и представлены на диаграмме