Approach to rapid mission design and planning

Methods and techniques are described for implementation in automated computer systems to assess parametric data, capabilities, requirements and constraints for planning earth orbit missions. Mission planning and design procedures are defined using two types of typical missions as examples. These missions were the high energy Astronomical Observatory Satellite missions, and Small Applications Technology Satellite missions

Lunar targeting study: Lunar and planetary Ephemeris tapes

The Univac 1108 computer tape data formats are documented for the ephermeris tape generated by the Jet Propulsion Laboratory and the ephemeris tape used by the Quick Response Targeting Program (QRTP). Ephermeris tapes are used as the data source for the position and velocity components of those celestial bodies being considered in an integrated trajectory simulation program. The QRTP ephemeris tape has data only for lunar mission simulations. The JPL ephemeris tape has data for the moon and the nine planets. The ephemeris tapes, the data formats, the coordinate systems, and units are defined. The transformation from the mean-of-1950 coordinate system to the nearest mean Besselian year is given

Дослідження проблеми здимання гірських порід із застосуванням апарату теорії стійкості механічних систем: постановка задачі

Описаны возможные направления развития исследований явлений, сопровождающихся большими пластическими деформациями (исследование геодинамических явлений, явлений потери устойчивости почвы выработки (пучения) и т.п.).Possible directions of development of researches of the effects, attended with large plastic strains are described (research of the geodynamics effects, effects of losses of roadway floor sustainability (rock heaving) etc.)

До біографії польського мандрівника Карла Качковського

Одним із забутих мандрівників, який залишив по собі опис побуту і традицій побачених ним народів та пам’яток історії Криму, і чия кримознавча спадщина, а надто – біографія, довгий час залишалася поза увагою українських дослідників, був поляк Карл Качковський. На сьогоднішній день окремі сторінки щоденника мандрівника видано в Криму, проте комплексної біографії К. Качковського у вітчизняній історіографії немає

Recent Decisions

Comments on recent decisions by Robert R. Waterson, Hugh E. Wall, Francis W. Matthys, Granville P. Ziegler, Thomas H. Nelson, Stanley A. Rosenstein, and John M. Doyle

Physical and chemical characterisation of some silicas and silica derivatives

An extensive study of four types of porous silica supports has been performed, with particular emphasis on their physical and morphological characteristics. These silicas were modified by reacting the surface silanol groups present with either 3-(trimethoxysilyl)propylmethacrylate or 3-glycidoxypropyltrimethoxysilane or 3-aminopropyltriethoxysilane, to produce derivatives with suitable functional groups for further utilisation in the immobilisation of biological compounds. The silicas and their derivatives used were fully characterised with regard to particle size distribution (laser light scattering), specific surface area (BET method), pore size distribution (gas adsorption and mercury porosimetry), density (helium pycnometry), yield of grafting (TGA) and chemical composition (FTIR/DRIFT).http://www.sciencedirect.com/science/article/B6TH9-3TXCN74-C/1/0c8b28b8c7165139b2661a2e21e0355