Investigation of advanced navigation and guidance system concepts for all-weather rotorcraft operations

Results are presented of a survey conducted of active helicopter operators to determine the extent to which they wish to operate in IMC conditions, the visibility limits under which they would operate, the revenue benefits to be gained, and the percent of aircraft cost they would pay for such increased capability. Candidate systems were examined for capability to meet the requirements of a mission model constructed to represent the modes of flight normally encountered in low visibility conditions. Recommendations are made for development of high resolution radar, simulation of the control display system for steep approaches, and for development of an obstacle sensing system for detecting wires. A cost feasibility analysis is included

Technology for large space systems: A bibliography with indexes (supplement 20)

This bibliography lists 694 reports, articles, and other documents introduced into the NASA Scientific and Technical Information System between July, 1988 and December, 1988. Its purpose is to provide helpful information to the researcher or manager engaged in the development of technologies related to large space systems. Subject areas include mission and program definition, design techniques, structural and thermal analysis, structural dynamics and control systems, electronics, advanced materials, assembly concepts, and propulsion

The 1989 JSC bibliography of scientific and technical papers

This document is a compilation of Lyndon B. Johnson Space Center contributions to the scientific and technical literature in aerospace and life sciences made during calendar year 1989. Citations include NASA formal series reports, journal articles, conference and symposium presentations, papers published in proceedings or other collective works, and seminar and workshop results

Technology 2002: The Third National Technology Transfer Conference and Exposition, volume 2

Proceedings from symposia of the Technology 2002 Conference and Exposition, December 1-3, 1992, Baltimore, MD. Volume 2 features 60 papers presented during 30 concurrent sessions

Solar power satellite system definition study. Volume 3: Operations and systems synthesis, phase 2

The results of the operations analyses are reported. Some of these analyses examined operations aspects of space vehicle in-space maintenance. Many of the analyses explored in great depth operations concerned the LEO Base cargo handling operations. Personnel transportation operations and cargo packaging were also analyzed. These operations analyses were performed to define the operational requirements for all of the SPS system elements so that equipment and facilities could be synthesized, and to make estimates of the manpower requirements. An overall, integrated, end-to-end description of the SPS operations is presented. The detailed operations analyses, upon which this integrated description was based, are included

Competitive Advantage of Sino-British Joint Ventures in China: A Study from Positioning, Resources, Partnership and Locational Perspectives

As a large number of MNEs have entered China and many domestic companies become increasingly competitive, Sino-foreign joint ventures are facing intensified competition in many industries in China. The review of the literature shows that few studies on Sino-foreign joint ventures focus on competitive issues, and most studies tend to examine the issues associated with partnerships. This thesis examines competitive advantage of Sino-British joint ventures in China and explains why some joint ventures have (or have not) achieved competitive advantage. The research developed a multi-perspective framework for analysing competitive advantage of the joint venture. The framework embraces strategic positioning, the resource-based view, partnerships, and location specific factors. The empirical study investigated five cases: AstraZeneca China, ERM China, Shanghai Marconi, GSK Chongqing, and YARACO. The case studies have revealed some salient characteristics of the joint ventures from the differing perspectives. The positioning perspective examines the alignment of activities with the positioning and fit among activities. Partnerships and locational factors are incorporated into the analysis. The analysis from the resource-based is focused on the potential of some critical resources for competitive advantage. The resources embedded in the partnership structure and the local context are likely to be sources of sustainable competitive advantage. The synthesized analysis investigates the relationship between activities and resources of the firm and leads to some theoretical propositions about creating sustainable competitive advantage. The research aims to make contributions to knowledge in the following respects. First, the research draws attention to competitive advantage of the joint venture as a relatively new area for the study. Second, by developing multi-perspective framework, the research can help broaden theoretical perspectives for studying the joint venture and may effect discoveries of new issues. Moreover, the research seeks to contribute to the debate about competitive advantage and strategy through synthesizing positioning and the resource-based view

Earth Observatory Satellite system definition study. Report 3: Design cost trade-off studies and recommendations

An analysis of the design and cost tradeoff aspects of the Earth Observatory Satellite (EOS) development is presented. The design/cost factors that affect a series of mission/system level concepts are discussed. The subjects considered are as follows: (1) spacecraft subsystem cost tradeoffs, (2) ground system cost tradeoffs, and (3) program cost summary. Tables of data are provided to summarize the results of the analyses. Illustrations of the various spacecraft configurations are included