Physical properties of Ce3-xTe4 below room temperature

The physical properties of polycrystalline Ce3-xTe4 were investigated by measurements of the thermoelectric properties, Hall coefficient, heat capacity, and magnetization. The fully-filled, metallic x=0 compound displays a soft ferromagnetic transition near 4K, and analysis of the corresponding heat capacity anomaly suggests a doublet ground state for Ce^{3+}. The transition is suppressed to below 2K in the insulating x=0.33 composition, revealing that magnetic order in Ce3-xTe4 is driven by an RKKY-type interaction. The thermoelectric properties trend with composition as expected from simple electron counting, and the transport properties in Ce3Te4 are observed to be similar to those in La3Te4. Trends in the low temperature thermal conductivity data reveal that the phonons are efficiently scattered by electrons, while all compositions examined have a lattice thermal conductivity near 1.2W/m/K at 200K.Comment: Submitted to Phys. Rev.

Oscillations and waves in solar spicules

Since their discovery, spicules have attracted increased attention as energy/mass bridges between the dense and dynamic photosphere and the tenuous hot solar corona. Mechanical energy of photospheric random and coherent motions can be guided by magnetic field lines, spanning from the interior to the upper parts of the solar atmosphere, in the form of waves and oscillations. Since spicules are one of the most pronounced features of the chromosphere, the energy transport they participate in can be traced by the observations of their oscillatory motions. Oscillations in spicules have been observed for a long time. However the recent high-resolutions and high-cadence space and ground based facilities with superb spatial, temporal and spectral capacities brought new aspects in the research of spicule dynamics. Here we review the progress made in imaging and spectroscopic observations of waves and oscillations in spicules. The observations are accompanied by a discussion on theoretical modelling and interpretations of these oscillations. Finally, we embark on the recent developments made on the presence and role of Alfven and kink waves in spicules. We also address the extensive debate made on the Alfven versus kink waves in the context of the explanation of the observed transverse oscillations of spicule axes

Electronic properties and phase transitions in low-dimensional semiconductors

We present the first review of the current state of the literature on electronic properties and phase transitions in TlX and TlMX2 (M = Ga, In; X = Se, S, Te) compounds. These chalcogenides belong to a family of the low-dimensional semiconductors possessing chain or layered structure. They are of significant interest because of their highly anisotropic properties, semi- and photoconductivity, non-linear effects in their I-V characteristics (including a region of negative differential resistance), switching and memory effects, second harmonic optical generation, relaxor behavior and potential applications for optoelectronic devices. We review the crystal structure of TlX and TlMX2 compounds, their transport properties under ambient conditions, experimental and theoretical studies of the electronic structure, transport properties and semiconductor-metal phase transitions under high pressure, and sequences of temperature-induced structural phase transitions with intermediate incommensurate states. Electronic nature of the ferroelectric phase transitions in the above-mentioned compounds, as well as relaxor behavior, nanodomains and possible occurrence of quantum dots in doped and irradiated crystals is discussed.Comment: 70 pages, 38 figure

Лечение пациентов с гнойно-некротическими ранами с использованием внутривенного лазерного облучения крови (405 нм)

Objective: to analyze the effectiveness of purulent-necrotic wounds management using intravenous laser irradiation of blood (405nm). Materials and methods. Object of study – patients with purulent-necrotic wounds. Clinical studies and analysis of the intravenous laser blood irradiation (405 nm) effect on the wound healing process and on the healing speed of purulent soft tissues wounds in patients with type 2 diabetes mellitus were carried out. Results. It was found that the use of intravenous laser blood irradiation (405 nm) is a highly effective method for the treatment of purulent soft tissues wounds, which allows to reduce the number of complications and shorten the time for complete epithelization of purulent wounds by 7–10 days compared with traditional treatment. Цель исследования: анализ эффективности методики лечения больных гнойно-некротическими ранами с использованием внутривенного лазерного облучения крови (405 нм). Материалы и методы исследования. Объект исследования – пациенты с гнойно-некротическими ранами. В процессе работы проводили клинические исследования и анализ влияния внутривенного лазерного облучения крови (405 нм) на течение раневого процесса и на скорость заживления гнойных ран мягких тканей больных сахарным диабетом II типа. Результаты исследования. Установлено, что использование внутривенного лазерного облучения крови (405 нм) является высокоэффективным методом лечения гнойных ран мягких тканей, позволяющим уменьшить количество осложнений и сократить сроки полной эпителизации гнойных ран на 7–10 суток по сравнению с традиционным лечением.

Largest ancient fortress of South-West Asia and the western world?:Recent fieldwork at Sasanian Qaleh Iraj at Pishva, Iran

The article presents recent works at Qale Iraj, near Varamin, Iran. My short contribution is on the Middle Persian ostraka found at the site

Rationale for Indicators of Arable Farming Duration (Based on Research Findings in the County of the Antique Polis of Kerkinitis)

Using the results of determination of macro-and micronutrients content, physical and chemical properties of soil and biogeochemical indicators we carried out the comparison of arable carbonate Chernozems of Crimea steppe zone which differed by duration of arable farmin

Rationale for Indicators of Arable Farming Duration (Based on Research Findings in the County of the Antique Polis of Kerkinitis)

Using the results of determination of macro-and micronutrients content, physical and chemical properties of soil and biogeochemical indicators we carried out the comparison of arable carbonate Chernozems of Crimea steppe zone which differed by duration of arable farmin