Time-dependent angularly averaged inverse transport

This paper concerns the reconstruction of the absorption and scattering parameters in a time-dependent linear transport equation from knowledge of angularly averaged measurements performed at the boundary of a domain of interest. We show that the absorption coefficient and the spatial component of the scattering coefficient are uniquely determined by such measurements. We obtain stability results on the reconstruction of the absorption and scattering parameters with respect to the measured albedo operator. The stability results are obtained by a precise decomposition of the measurements into components with different singular behavior in the time domain

Electrostatic tuning of magnetism at the conducting (111) (La0.3_{0.3}Sr0.7_{0.7})(Al0.65_{0.65}Ta0.35_{0.35})/SrTiO3_3 interface

We present measurements of the low temperature electrical transport properties of the two dimensional carrier gas that forms at the interface of $(111)$ (La$_{0.3}$Sr$_{0.7}$)(Al$_{0.65}$Ta$_{0.35}$)/SrTiO$_3$ (LSAT/STO) as a function of applied back gate voltage, $V_g$. As is found in (111) LaAlO$_3$/SrTiO$_3$ interfaces, the low-field Hall coefficient is electron-like, but shows a sharp reduction in magnitude below $V_g \sim$ 20 V, indicating the presence of hole-like carriers in the system. This same value of $V_g$ correlates approximately with the gate voltage below which the magnetoresistance evolves from nonhysteretic to hysteretic behavior at millikelvin temperatures, signaling the onset of magnetic order in the system. We believe our results can provide insight into the mechanism of magnetism in SrTiO$_3$ based systems.Comment: 5 pages, 3 figure

Coherent radiation by molecular magnets

The possibility of coherent radiation by molecular magnets is investigated. It is shown that to realize the coherent radiation, it is necessary to couple the considered sample to a resonant electric circuit. A theory for describing this phenomenon is developed, based on a realistic microscopic Hamiltonian, including the Zeeman terms, single-site anisotropy, and dipole interactions. The role of hyperfine interactions between molecular and nuclear spins is studied. Numerical solutions of the spin evolution equations are presented.Comment: Latex file, 11 pages, 3 figure

Cassidina extenda, a new species of isopod from Bombay

This article does not have an abstract

ДОСЛІДЖЕННЯ РАДІОЗАХИСНИХ ТА АНТИМІКРОБНИХ ВЛАСТИВОСТЕЙ КИСЛОМОЛОЧНОГО ПРОДУКТУ ДЛЯ ОЗДОРОВЧОГО ХАРЧУВАННЯ

There are given the results of experimental and clinical investigations of sour–milk bacterial product of «Narine». The sour–milk product «Narine» and bacterial preparation «Narine» show the antioxidant, membrane stabilizing and adaptogenic properties revealed in conditions of the everyday application in organisms of animals of isotope of 137Cs during 30 days. The products of «Narine» eliminate occurrence of inflammatory processes, normalizes conditions of mucous membranes and improves the state of organisms of women suffered of gardnerellezus. It is recommended to consume the products of «Narine» by men who live in regions contaminated by radionuclides. The product may be consumed also as the dietetic, prophylactic, and be used for curing of ill men.Представлены результаты экспериментальных и клинических исследований кисломолочного продукта и бактериального препарата «Наринэ». Выявлены антиоксидантные, мембраностабилизирующие и адаптогенные свойства кисломолочного продукта и бактериального препарата «Наринэ» на фоне ежедневного введения в организм животным 137Cs в течение 30 суток. Кисломолочный продукт и бактериальный препарат «Наринэ» устраняют воспалительные процессы, нормализуют слизистые оболочки и улучшают общее состояние организма у женщин с гарднереллезом. Рекомендовано употреблять «Наринэ» населению, которое проживает на радиоактивно загрязненных терриротиях, а также в качестве диетического продукта для профилактики и лечения.Представлені результати експериментальних і клінічних досліджень кисломолочного продукту і бактеріального препарату «Наріне». Виявлені антиоксидантні, мембрано стабілізуючі і адаптогенні властивості кисломолочного продукту і бактеріального препарату «Наріне» на фоні щоденного введення в організм тварин на протязі 30 діб. Кисломолочний продукт і бактеріальний препарат «Наріне» запобігає запальним процесам , нормалізує слизневі оболонкиі покращує загальний стан організму у жінок з гарднереллезом. Рекомендовано вживати «Наріне» населенню, яке проживає на радіоактивно забруднених територіях, а також в якості дієтичного продукту для профілактики та лікування. &nbsp

Comparison study of preferential oxidation of CO over nanocrystalline Cu/CeO2 catalysts synthesized by different preparation methods

121-126Preferential oxidation of carbon monoxide in presence of excess hydrogen is a promising alternative to restrict the CO deposition in the Pt-anode in the practical polymer electrolyte membrane fuel cell application. In the present work, nanocrystalline copper-ceria catalysts have been synthesized by hydrothermal method, wet impregnation method and urea nitrate combustion method. Their characterizations have been carried out by using X-ray diffraction, transmission electron microscopy, X . ray photoelectron spectroscopy- It has been found that Cu2+ replaced Ce4+ in cerium oxide, creating oxygen vacancy. The formation of more nano-sized CeO2 leads to more oxygen vacancies in CeO2 through the formation of interfacial Cu1+ ions, which also enhances the CO oxidation activity. Among the synthesized Cu-CeO2 catalysts, the catalyst prepared by hydrothermal method have shown both CO conversion andC O2 selectivity as 100% towards CO oxidation at 373 K in the presence of excess H2 making this catalyst viable for practical fuel cell application.

The affordance of compassion for animals: a filmic exploration of industrial linear rhythms

Compassion is an emotion that could be useful for improving the lives of animals within the intensive and factory farming system (IFFS). Rhythms that exist within this system play a role in making compassion difficult to realize, which formulates the research question: How do the rhythms of the IFFS shape the affordance of compassion for animals? Drawing on a cultural mode of analysis informed by Henri Lefebvre’s work on rhythms, this paper explored the rhythms of three films that focus on the treatment of animals in this system: Meat; Our Daily Bread and Never Let Me Go. Industrial linear rhythms seem to compromise the compassion offered to animals in the IFFS by manipulating the cyclical rhythms of animals and animalized bodies from birth, through life and at death. Compassion for animals and animalized bodies in the IFFS, this paper concludes, is often provided in a piecemeal and localized manner

The phonon Boltzmann equation, properties and link to weakly anharmonic lattice dynamics

For low density gases the validity of the Boltzmann transport equation is well established. The central object is the one-particle distribution function, $f$, which in the Boltzmann-Grad limit satisfies the Boltzmann equation. Grad and, much refined, Cercignani argue for the existence of this limit on the basis of the BBGKY hierarchy for hard spheres. At least for a short kinetic time span, the argument can be made mathematically precise following the seminal work of Lanford. In this article a corresponding programme is undertaken for weakly nonlinear, both discrete and continuum, wave equations. Our working example is the harmonic lattice with a weakly nonquadratic on-site potential. We argue that the role of the Boltzmann $f$-function is taken over by the Wigner function, which is a very convenient device to filter the slow degrees of freedom. The Wigner function, so to speak, labels locally the covariances of dynamically almost stationary measures. One route to the phonon Boltzmann equation is a Gaussian decoupling, which is based on the fact that the purely harmonic dynamics has very good mixing properties. As a further approach the expansion in terms of Feynman diagrams is outlined. Both methods are extended to the quantized version of the weakly nonlinear wave equation. The resulting phonon Boltzmann equation has been hardly studied on a rigorous level. As one novel contribution we establish that the spatially homogeneous stationary solutions are precisely the thermal Wigner functions. For three phonon processes such a result requires extra conditions on the dispersion law. We also outline the reasoning leading to Fourier's law for heat conduction.Comment: special issue on "Kinetic Theory", Journal of Statistical Physics, improved versio

Ultrastructural and functional fate of recycled vesicles in hippocampal synapses

Efficient recycling of synaptic vesicles is thought to be critical for sustained information transfer at central terminals. However, the specific contribution that retrieved vesicles make to future transmission events remains unclear. Here we exploit fluorescence and time-stamped electron microscopy to track the functional and positional fate of vesicles endocytosed after readily releasable pool (RRP) stimulation in rat hippocampal synapses. We show that most vesicles are recovered near the active zone but subsequently take up random positions in the cluster, without preferential bias for future use. These vesicles non-selectively queue, advancing towards the release site with further stimulation in an actin-dependent manner. Nonetheless, the small subset of vesicles retrieved recently in the stimulus train persist nearer the active zone and exhibit more privileged use in the next RRP. Our findings reveal heterogeneity in vesicle fate based on nanoscale position and timing rules, providing new insights into the origins of future pool constitution