Report of the Terrestrial Bodies Science Working Group. Volume 7: The Galilean satellites

The formational and evolutionary history of natural satellites, their mineralogical composition and other phenomena of scientific interest are discussed. Key scientific questions about IO, Ganymede, Callisto, and Europa are posed and the measurements and instruments required for a Galilean satellite lander in the 1980's are described

Research of the thorium purification at monazite refinement processes

This paper is aimed to the research of the thorium purification processes at monazite refinement processes. We have investigated different solution containing thorium with different mix of rare-earth elements. It was found that the application of cation resin is well- recommended if we want to reach the highest yields of thorium purification process

QCD-supression by Black Hole Production at the LHC

Possible consequences of the production of small black holes at the LHC for different scenarios with large extra dimensions are investigated. The effects from black hole production on some standard jet observables are examined, concentrating on the reduction of the QCD cross section. It is found that black hole production of partons interacting on a short enough distance indeed seem to generate a drastic drop in the QCD cross section. However from an experimental point of view this will in most cases be camouflaged by energetic radiation from the black holes

Report of the Terrestrial Bodies Science Working Group. Volume 2: Mercury

The objectives and rationale for scientific investigation of Mercury are explored. Knowledge already obtained by astronomical observations and Mariner 10 spacecraft is reviewed and measurements required for the principal scientific goals are described. The use of low thrust propulsion systems is recommended so that maximum scientific return may be achieved and the reconnaissance phase of Mercury exploration may be completed in a single mission. Accelerated development is recommended on solar electric propulsion, solar sails, passive and active cooling mechanisms, and single rough landers

Report of the Terrestrial Bodies Science Working Group. Volume 4: The moon

A rationale for furture exploration of the moon is given. Topics discussed include the objectives of the lunar polar orbiter mission, the mission profile, and general characteristics of the spacraft to be used

VETA x ray data acquisition and control system

We describe the X-ray Data Acquisition and Control System (XDACS) used together with the X-ray Detection System (XDS) to characterize the X-ray image during testing of the AXAF P1/H1 mirror pair at the MSFC X-ray Calibration Facility. A variety of X-ray data were acquired, analyzed and archived during the testing including: mirror alignment, encircled energy, effective area, point spread function, system housekeeping and proportional counter window uniformity data. The system architecture is presented with emphasis placed on key features that include a layered UNIX tool approach, dedicated subsystem controllers, real-time X-window displays, flexibility in combining tools, network connectivity and system extensibility. The VETA test data archive is also described

Оценка эффективности катионита КУ-2-8 при извлечении ионов меди из воды в присутствии ионов жесткости

Наведено результати досліджень з визначення ефективності катіоніту КУ-2-8 під час вилучення йонів міді з води в присутності йонів жорсткості за низьких концентрацій йонів міді. Показано, що в статичних умовах при концентрації міді від 1 до 30 мг/дм3 вилучення міді проходить неефективно як з дистильованої, так і з водопровідної води незалежно від форми йоніту. Даний показник знижується під час збільшення об’єму розчину при фіксованому об’ємі йоніту. Суттєвого підвищення ефективності вилучення йонів міді на даному катіоніті досягнуто в динамічних умовах при використанні йоніту в кислій та сольовій формі і наявності в розчині йонів жорсткості. Встановлено, що ефективність десорбції йонів міді розчинами хлоридної кислоти в статичних умовах була низькою. В динамічних умовах досягнуто практично повного вилучення йонів міді розчинами хлоридної кислоти.The results of studies to determine the effectiveness of KU-2-8 cation extracting copper ions from water hardness ions in the presence of low concentrations of copper ions. It is shown that at concentration of copper from 1 to 30 mg/dm3 extraction of copper takes place in static conditions inefficiently both from distilled and from tap water irrespective of an ionite form. This indicator decreases at increase in volume of solution at the fixed ionite volume. Significant efficiency removal of copper ions in this cation achieved in dynamic conditions using resin in acid and salt form in the presence of ions in solution stiffness. It was established that the efficiency of desorption of copper ions hydrochloric acid solutions in static conditions was low. In dynamic conditions reached almost complete desorption of copper ions by solutions of hydrochloric acid.Приведены результаты исследований по определению эффективности катионита КУ-2-8 при извлечении ионов меди из воды в присутствии ионов жесткости при низких концентрациях ионов меди. Показано, что в статических условиях при концентрации меди от 1 до 30 мг/дм3 извлечение меди проходит неэффективно как из дистиллированной, так и из водопроводной воды независимо от формы ионита. Данный показатель снижается при увеличении объема раствора при фиксированном объеме ионита. Существенного повышения эффективности извлечения ионов меди на данном катионите достигнуто в динамических условиях при использовании ионита в кислой и солевой форме при наличии в растворе ионов жесткости. Установлено, что эффективность десорбции ионов меди растворами соляной кислоты в статических условиях была низкой. В динамических условиях достигнуто практически полной десорбции ионов меди растворами соляной кислоты

Hermitian Young Operators

Starting from conventional Young operators we construct Hermitian operators which project orthogonally onto irreducible representations of the (special) unitary group.Comment: 15 page

Diffusion and Deformations in Heterosystems with GaN/AlN Superlattices, According to Data from EXAFS Spectroscopy

Multilayered samples with extremely narrow GaN quantum wells in an AlN host are synthesized via ammonia MBE. The parameters of the microstructu re are determined by means of EXAFS spectroscopy, high-resolution electron microscopy, and low-angle sc attering. Their relationship to the morphology of GaN/AlN superlattices is established. The influence of growth conditions and the thickness of superlattices on their optical properties and mixing in the near-boundary layers is established