Malformations of the sacculus and the semicircular canals in spider morph pythons

Spider morph ball pythons are a frequently-bred designer morph with striking alterations of the skin color pattern. We created high-resolution μCT-image series through the otic region of the skulls, used 3D-reconstruction software for rendering anatomical models, and compared the anatomy of the semicircular ducts, sacculus and ampullae of wildtype Python regius (ball python) with spider morph snakes. All spider morph snakes showed the wobble condition (i.e., twisting movements of the head, impaired locomotion, difficulty striking or constricting prey items). We describe the inner ear structures in wildtype and spider morph snakes and report a deviant morphology of semicircular canals, ampullae and sacculus in the latter. We also report about associated differences in the desmal skull bones of spider morph snakes, which were characterized by wider semicircular canals, ampullae widened and difficult to discern in μCT, a deformed crus communis, and a small sacculus with a highly deviant X-ray morphology as compared to wildtype individuals. We observed considerable intra- and interindividual variability of these features. This deviant morphology in spider morph snakes could easily be associated with an impairment of sense of equilibrium and the observed neurological wobble condition. Limitations in sample size prevent statistical analyses, but the anatomical evidence is strong enough to support an association between the wobble condition and a malformation of the inner ear structures. A link between artificially selected alterations in pattern and specific color design with neural-crest associated developmental malformations of the statoacoustic organ as known from other vertebrates is discussed

Исследование конформации и электронной структуры N-метилмочевины методом функционала плотности

В настоящей работе методами DFT и HF с использованием пакета программ для квантово-химических расчетов Gaussian проведен конформационный анализ N-метилмочевины в растворе ДМСО. Окружение молекулы учитывалось в рамках модели непрерывной поляризуемой среды PCM. Выполнено исследование стереоэлектронных взаимодействий методом NBO, произведен расчет энергий граничных орбиталей

A Simple Method for Rise-Time Discrimination of Slow Pulses from Charge-Sensitive Preamplifiers

Performance of a simple method of particle identification via pulse rise time discrimination is demonstrated for slow pulses from charge-sensitive preamplifiers with rise times ranging from 10 ns to 500 ns. The method is based on a comparison of the amplitudes of two pulses, derived from each raw preamplifier pulse with two amplifiers with largely differing shaping times, using a fast peak-sensing ADC. For the injected charges corresponding to energy deposits in silicon detectors of a few tens of MeV, a rise time resolution of the order of 1 ns can be achieved. The identification method is applicable in particle experiments involving large-area silicon detectors, but is easily adaptable to other detectors with a response corresponding to significantly different pulse rise times for different particle species.Comment: 10 pages, 7 figure

Quark confinement and the bosonic string

Using a new type of simulation algorithm for the standard SU(3) lattice gauge theory that yields results with unprecedented precision, we confirm the presence of a $\gamma/r$ correction to the static quark potential at large distances $r$, with a coefficient $\gamma$ as predicted by the bosonic string theory. In both three and four dimensions, the transition from perturbative to string behaviour is evident from the data and takes place at surprisingly small distances.Comment: TeX source, 21 pages, figures include

Исследование алгоритмов функционирования СМО с использованием библиотеки SimEvents

Выпускная квалификационная работа 80 с., 18 рис., 6 табл., 21 источник. Объект исследования — модель управления графитовыми стержнями в ядерном реакторе. Цель работы — разработка модели управления замедляющими стержнями в реакторе с использованием библиотеки SimEvents. Изучены принципы имитационного моделирования с помощью библиотек SimEvents, Simulink. Разработана модель управления графитовыми стержнями в реакторе, получены параметры системы, проведен их анализ. Модель может использоваться как имитатор физического процесса в атомном производстве. Имитационная модель дает подтверждение расчетов, прогноз работы системы, позволяет исследовать работу в критических режимах. Планируется изучение новых характеристик системы, разработка более сложной модели, параметров, влияющих на новую модельGraduation qualification project consist of 80 p., 18 fig., 6 tab., 21 sources. The object of this study is graphite rods’s control model in nuclear reactors. The purpose of work – graphite rods’s control model development using SimEvents in nuclear reactors. Is studied the simulation principles using libraries SimEvents, Simulink. Are obtained the model of the control rods in the reactor graphite, the system parameters , their analysis was carried out. The model can be used as a simulator of a physical process in nuclear industry. A simulation model provides evidence calculations, the forecast of the system, allows you to explore the critical operation. It is planned to study the characteristics of the new system, the development of a more complex model, the parameters affecting a mode

Modelling personality features by changing prosody in synthetic speech

This study explores how features of brand personalities can be modelled with the prosodic parameters pitch level, pitch range, articulation rate and loudness. Experiments with parametrical diphone synthesis showed that listeners rated the prosodically changed versions better than a baseline version for the dimension

Исследование структуры и свойств изделий, полученных методом порошковой металлургии из композиции Fe-C-Cr-Ni-W

Выпускная квалификационная работа 89с., 12рис., 17 табл., 21 источников литературы. Ключевые слова: порошковая металлургия, механическая активация, спекание, пористость, размер зерен и пор, микротвёрдость, металлографический и фазовый анализ. Цель работы – Исследовать структуру и свойства изделий, полученных методом порошковой металлургии из композиции Fe-C-Cr-Ni-W. В работе проводили подготовку поверхности образца (шлифовка, полировка, травление), оценку пористости, металлографический и рентгеноструктурный анализ, а также была измерена микротвердость. Основные характеристики спеченной стали 03Х17Н12В: пористость – 10%; микротвердость – 82 кг/см3; структура - аустенитная.Final qualifying work is presented with 89 pages,12pictures, 17tables，21literature sources. Keywords: powder metallurgy, mechanical activation, sintering, porosity, grain size and pore, micro-hardness, metallographic analysis, phase analysis. Research purpose: study the structure and the properties of the products obtained by powder metallurgy from the composition Fe-C-Cr-Ni-W. In the work, conducted preparation of the sample surface (grinding, polishing and etching) ，evaluation of porosity, metallographic and X-ray analysis, even micro-hardness was measured. The main characteristics of the sintered steel 03Cr17Ni12W: porosity - 10%; micro-hardness - 82 kg /cm3; structure - austenitic