Extravehicular activity translation arm (EVATA) study

The preliminary design of a deployable Extravehicular Activity Translation Arm (EVATA) assembly which will allow an EVA crewman to perform tasks in the vicinity of the External TNK (ET) umbilical doors and to inspect most of the underside of the shuttle spacecraft is reported. The concept chosen for the boom structure was the Astro Extendable Support Structure (ESS) which formed the main structure for the Synthetic Aperture Radar (SAR) Antenna System on the SEASAT A spacecraft. This structure is a deployable triangular truss. A comparison of the EVATA and the SEASAT A ESS is shown. The development of status of the ESS is shown. The satellite configuration, the stowed truss load path, and the envelope deployment sequence for the ESS are also shown

The electronic absorption spectrum of crystallinechromyl chloride at 1.7[deg]K

The spectrum of chromyl chloride, CrO2Cl2 , in the region 6000 A-3800 A hasbeen obtained for the crystalline substance at temperatures down to 1.7[deg]K. Three absorption systems have been observed, together with the start of a fourth system at [lambda] < 3800 A. One of the systems has been analyzed in some detail and shown to be in agreement with conclusions drawn from the spectrum of the vapor.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/33234/1/0000624.pd

Far-infrared and Raman spectra of pseudo -tetrahedral complexes of ethylenedimorpholene

The far-i.r. and Raman spectra of a closely related group of pseudo -tetrahedral complexes of general formula [MX 2 EDM] are reported (M = Co II , Ni II , Cu II , Zn II ; X = Cl or Br). EDM, ethylenedimorpholene, acts in these compounds as a bidentate nitrogen donor. The main skeletal vibrations are assigned under the approximate symmetry of the C 2v (MX 2 Y 2 ) point group.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/43851/1/11243_2004_Article_BF00623421.pd

Sole Sourcing Reliance

This qualitative research case study investigated the increasing reliance on sole-sourced critical defense components within the U.S. Department of Defense (DoD) supply chain network. This reliance has resulted in increased risks of operational units not achieving the agency’s minimum operational readiness requirements as presented in the DoD Inspector General’s Top 10 management challenges for the fiscal year 2020. The general problem to be addressed was the increasing reliance on sole-sourcing within the supply chain networks of government agencies and business organizations that have contributed to heightened risks of operational readiness reduction and manufacturing production delays. The purpose of this qualitative case study was to explore the strategies that some U.S. DoD contract officers use to reduce sole-sourced critical equipment components from the supply chain. The researcher framed research questions to focus on previous cases experienced by former or current U.S. DoD contracting officers. This strategy was implemented to gain their perspective on what factors they believe are contributing to the increasing reliance on sole sources for materials and resources. Eight interviews were conducted using purposeful sampling. The analysis of the interview data yielded three primary themes and seven sub-themes for consideration. The themes developed during this study are pertinent in discussing some potential causation based on their frequency among the eight interviews. The findings were connected to a substantial body of literature from academia, industry media, and DoD policies and procedures. Potential opportunities for improving the general business practices within the DoD and major defense firms were identified