Future Commercial Communications Satellites for Shuttle Launch

Commercial communications satellites have grown from infancy seventeen years ago to a major element of the spaceflight program. The paper describes the major commercial communications satellites and their development with emphasis on INTELSAT, United States and foreign domestic and MARISAT/INMARSAT. Future direct broadcast satellites and the possibilities for geostationary platforms are also discussed. These commercial communications satellites and their offsprings will constitute a stable, growing payload base for shuttle launches throughout this decade. It will be necessary that the costs of Shuttle launches remain economic so this payload base is not eroded by other launch vehicles

Satellite communications systems and technology. Executive Summary

NASA and the National Science Foundation (NSF) commissioned a panel of US experts to study the international status of satellite communications systems and technology. The study covers emerging systems concepts, applications, services, and the attendant technologies. The panel members travelled to Europe, Japan, and Russia to gather information first-hand. They visited 17 sites in Europe, 20 sites in Japan, and four in Russia. These included major manufacturers, government organizations, service providers, and associated R&D facilities. The panel's report was reviewed by the sites visited, by the panel, and by representatives of US industry. The report details the information collected and compares it to US activities

Implementation of an enhanced recovery protocol in gynecologic oncology.

Enhanced Recovery after Surgery (ERAS) is an evidence-based approach that aims to reduce narcotic use and maintain anabolic balance to enable full functional recovery. Our primary aim was to determine the effect of ERAS on narcotic usage among patients who underwent exploratory laparotomy by gynecologic oncologists. We characterized its effect on length of stay, intraoperative blood transfusions, bowel function, 30-day readmissions, and postoperative complications. A retrospective cohort study was performed at Abington Hospital-Jefferson Health in gynecologic oncology. Women who underwent an exploratory laparotomy from 2011 to 2016 for both benign and malignant etiologies were included before and after implementation of our ERAS protocol. Patients who underwent a bowel resection were excluded. A total of 724 patients were included: 360 in the non-ERAS and 364 in the ERAS cohort. An overall reduction in narcotic usage, measured as oral morphine milliequivalents (MMEs) was observed in the ERAS relative to the non-ERAS group, during the entire hospital stay (MME 34 versus 68, p \u3c 0.001 and within 72 h postoperatively (MME 34 versus 60, p \u3c 0.005). A shorter length of stay and earlier return of bowel function were also observed in the ERAS group. No differences in 30-day readmissions (p = 0.967) or postoperative complications (p = 0.328) were observed. This study demonstrated the benefits of ERAS in Gynecologic Oncology. A significant reduction of postoperative narcotic use, earlier return of bowel function and a shorter postoperative hospital stay was seen in the ERAS compared to traditional perioperative care

Information and communication technology

NASA and the National Science Foundation (NSF) commissioned a panel of U.S. experts to study the international status of satellite communications systems and technology. The study covers emerging systems concepts, applications, services, and the attendant technologies. The panel members traveled to Europe, Japan, and Russia to gather information firsthand. They visited 17 sites in Europe, 20 in Japan, and 4 in Russia. These included major manufacturers, government organizations, service providers, and associated research and development facilities. The panel's report was reviewed by the sites visited, by the panel, and by representatives of U.S. industry. The report details the information collected and compares it to U.S. activities

NA

http://www.archive.org/details/effectofsurfaceo00ede

Torsional relaxation in polycrystalline cadmium as a function of surface phenomena

This thesis document was issued under the authority of another institution, not NPS. At the time it was written, a copy was added to the NPS Library Collection for reasons not now known. It has been included in the digital archive for its historical value to NPS. Not believed to be a CIVINS (Civilian Institutions) title.An investigation of the tortional after-effects in polycrystalline cadmium wires which had undergone torsional plastic deformation was made. The influence of surface phenomena on relaxation rates was studied. Relaxation rates of clean wires were not influenced by the surrounding media; air, distilled water and dilute sulfuric acid. Relaxation rates of wires which had an oxide surface film were greater than those of the clean wires, and application of acid to oxidized wires caused reversals in the strain versus log time relaxation curves. Cold working caused the initial strain rate to increase; annealing prior to oxidation caused it to decrease. Increasing film thickness did not effect relaxation rate but lengthened the time during which reversal occurred. Delay in applying acid to oxidized wires increased the amount of reversal and the time for it to occur. Oxidizing the wire after twisting caused the initial strain rate to be smaller, but when acid was applied the rate became greater. The results are explained by assuming the oxide films to act as elastic, coherent jackets which modify the normal relaxation rates of the bare wires.Office of Naval Researchhttp://www.archive.org/details/torsionalrelaxat00edelUnited States Nav