• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 5322
  • 3275
  • 979
  • 714
  • 649
  • 432
  • 195
  • 195
  • 195
  • 195
  • 195
  • 183
  • 146
  • 132
  • 114
  • Tagged with
  • 14357
  • 2252
  • 1619
  • 1469
  • 1414
  • 1343
  • 1221
  • 909
  • 829
  • 781
  • 623
  • 617
  • 607
  • 604
  • 596
  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
21

The commercialisation of the international space station /

Koulikova, Ioulia. January 2000 (has links)
No description available.
22

Space debris : legal and policy implications

Baker, Howard A. January 1988 (has links)
No description available.
23

Legal and technical considerations of space debris

Hörl, Kay-Uwe January 2000 (has links)
No description available.
24

An investigation of fuel optimal terminal descent

Rea, Jeremy Ryan. January 1900 (has links)
Thesis (Ph. D.)--University of Texas at Austin, 2009. / Title from PDF title page (University of Texas Digital Repository, viewed on Sept. 9, 2009). Vita. Includes bibliographical references.
25

Structural urban space : a framework for the understanding of the physical city /

Peters, A. D. January 1995 (has links)
Thesis (M.U.D.)--University of Hong Kong, 1996. / Includes bibliographical references.
26

A case for strategic change in the new space age

Bostad, Mathew Curtis 15 February 2011 (has links)
Since the Space Race of the 1960s the National Aeronautics and Space Administration (NASA) has been the face of the U.S. space industry, responsible for driving aeronautics research, exploring our solar system through human and robotic missions, and inspiring the nation through scientific achievement. NASA and its core group of large aerospace contractors have worked to successfully carry out U.S. space exploration goals and have been responsible for some of the most significant engineering successes in history. Over the past decade or so, however, it has increasingly been the private space sector advancing new markets, capturing the public imagination, and working to reduce the timeline and cost of access to space. As the Obama administration’s new space policy begins to put increased emphasis on developing the U.S. commercial space sector, legacy NASA contractors are starting to see what may be the beginnings of a new competitive environment in the human spaceflight market. With the end of the Space Shuttle Program looming, and the restructuring of its successor the Constellation Program in progress, NASA continues to look for a way forward for its human spaceflight program. At the same time the agency’s contractors are dealing with a loss of significant work statement, a lack of new development programs, and an increase in the number of competitors entering the commercial space market. As Boeing Space Exploration attempts to traverse this turbulent period it must also look ahead to the competitive conditions which may result from these changes. It is critical that companies such as Boeing analyze the current structural trends in the industry and attempt to develop a robust strategy to position the company going forward. This paper aims to present analysis of the current market challenges faced by Boeing Space Exploration and the emerging competitive environment in the human spaceflight industry. General competitive strategies are discussed along with recommendations on which strategic pursuits might best allow the division to maintain its leadership in the industry and successfully compete in a new, more commercial space market. / text
27

Structural urban space a framework for the understanding of the physical city /

Peters, A. D. January 1995 (has links)
Thesis (M.U.D.)--University of Hong Kong, 1996. / Includes bibliographical references. Also available in print.
28

Geographies of vision and modernity : things seen in the Scottish Highlands

MacDonald, Fraser January 2003 (has links)
No description available.
29

Transformable (space).

January 2003 (has links)
Lam Wai Ki, Vicky. / "Architecture Department, Chinese University of Hong Kong, Master of Architecture Programme 2002-2003, design report." / Includes bibliographical references (leaves 344-355). / definition --- p.1 / research / methodology --- p.7 / HongKong --- p.11 / purposes --- p.19 / joints --- p.33 / categories --- p.37 / precedents studies --- p.43 / variations --- p.149 / exploration / basic principles --- p.169 / design development --- p.189 / design / basic principles --- p.239 / Chapter - --- elements&space / flexible --- p.261 / Chapter - --- functions / transportable --- p.277 / Chapter - --- locations / efficient --- p.299 / Chapter - --- "materials, joints & structure" / bibliography --- p.343
30

The role of view information in virtual environment navigation.

January 2004 (has links)
Wong Hon-chung. / Thesis (M.Phil.)--Chinese University of Hong Kong, 2004. / Includes bibliographical references (leaves 88-91). / Abstracts in English and Chinese. / Chapter Chapter 1: --- Introduction --- p.1 / "A Stage Model of Primary Spatial Learning (Siegel & White, 1975; Siegel, 1977)" --- p.2 / "Spatial Knowledge as Problem-Solving Strategy (Aginsky et. al.,1997)" --- p.4 / Viewpoint Dependency in Object Recognition --- p.6 / Rationale for the Study --- p.8 / Chapter Chapter 2: --- Experiment 1 --- p.12 / Method --- p.12 / Participants --- p.12 / Stimuli --- p.12 / Landmark Objects --- p.12 / Virtual Environment --- p.15 / Procedure --- p.18 / Learning Phase --- p.18 / Testing Phase --- p.19 / Results --- p.20 / Sensitivity --- p.22 / Degree of Discrepancy --- p.22 / Confidence Rating --- p.23 / Discussion --- p.23 / Chapter Chapter 3: --- Experiment 2 --- p.26 / Method --- p.28 / Participants --- p.28 / Stimuli --- p.28 / Landmark Objects --- p.28 / Virtual Environment --- p.28 / Procedure --- p.29 / Learning Phase --- p.30 / Testing Phase --- p.30 / Results --- p.30 / Sensitivity --- p.33 / Degree of Discrepancy --- p.33 / Confidence Rating --- p.33 / Discussion --- p.36 / Chapter Chapter 4: --- Experiment 3 --- p.38 / Method --- p.39 / Participants --- p.39 / Role of View in Virtual Navigation --- p.vii / Stimuli --- p.29 / Landmark Objects --- p.39 / Virtual Environment --- p.41 / Procedure --- p.43 / Learning Phase --- p.43 / Testing Phase --- p.44 / Results --- p.44 / Online Measures --- p.44 / Number of Trials taken in Learning Phase --- p.46 / Number of Encounters with Landmark Objects during Learning Phase --- p.46 / Number of Turning Errors during Learning --- p.47 / Response Latency for Turning Decision --- p.49 / Offline Measures --- p.49 / Sensitivity --- p.51 / Degree of Discrepancy --- p.51 / Confidence Rating --- p.51 / Discussion --- p.52 / Effect of MAP --- p.52 / Manipulation on the NON-MAP Group --- p.54 / Manipulation on the MAP Group --- p.54 / Effect of INTERSECTION --- p.56 / Chapter Chapter 5: --- Experiment 4 --- p.59 / "Classification of Sketch Maps (Aginsky, et. al.1997)" --- p.59 / 0-D Group --- p.59 / 1-D Group --- p.50 / 2-D Group --- p.60 / Method --- p.60 / Participants --- p.60 / Stimuli --- p.60 / Procedure --- p.61 / Learning Phase --- p.61 / Testing Phase --- p.61 / Results --- p.61 / Classification of Illustrations --- p.62 / 0-D Group --- p.64 / 0.5-D Group --- p.64 / 1-D Group --- p.65 / 2-D Group --- p.65 / Online Measures --- p.66 / Number of Trials taken in Learning Phase --- p.68 / Number of Encounters with Landmark Objects during Learning Phase --- p.68 / Number of Turning Errors during Learning --- p.68 / Response Latency for Turning Decision --- p.68 / Offline Measures --- p.71 / Sensitivity --- p.73 / Degree of Discrepancy --- p.75 / Confidence Rating --- p.75 / Discussion --- p.75 / Effect of GROUP --- p.76 / Effect of INTERSECTION --- p.77 / Chapter Chapter 6: --- General Discussion --- p.79 / Spatial Learning Strategy --- p.79 / Type of Intersection --- p.80 / Differences in Number of Encounters --- p.81 / Differences in Number of Turning Errors and Response Latency --- p.82 / Differences in Sensitivity and Degree of Discrepancy --- p.82 / What Exactly Did the Type of Intersection Manipulated? --- p.85 / Environmental Characteristics --- p.86 / References --- p.88

Page generated in 0.0534 seconds