• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 1
  • Tagged with
  • 3
  • 3
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 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.
1

Performance of earth-to-orbit transports breathing air

Dorrington, Graham Edward January 1988 (has links)
No description available.
2

Accumulation model processes of human suborbital space transportation industry emergence

Davidian, Kenneth John 16 August 2018 (has links)
To respond to the research question, “by what processes do new industries emerge?”, the author identified different models of innovation development and industry emergence. Relevant streams of literature included economics, innovation, sociology, economic sociology, and institution theory. A functional goal innovation development theory, referred to as the accumulation model, states that many organizations, from both the public- and private-sectors, collect and accumulate resources in three major social functions. Previous research defined the model state-of-the-art at a high level of abstraction, identifying the three main components (industry infrastructure elements), depicted as separate boxes with arrows between them. This research uses grounded theory extension to identify microscopic processes, delving within and between the three macroscopic infrastructure elements. The industry context of this research was the emerging human suborbital space transportation (“space tourism”) industry. Data came from secondary sources, archival data, and primary sources. This research collected more than 8,400 pieces of secondary and archival data from news aggregator web sites, distilled them into approximately 600 significant events, and categorized them within the accumulation model framework’s three main components: Institutional Arrangements, Resource Endowments, and Proprietary Functions. Industry structure and disruptive innovation studies provided additional analytical perspectives. Primary data, collected via 40 interviews of industry members, filled in and validated data gaps. The combined analyses resulted in a deeper understanding of the industry emergence process. Observations of the sequence of events, and of linkages between events and actors, allowed the author to propose a set of processes, describing how the accumulated industry resources resulted in industry emergence. Description of these processes required modifications to the original framework. Furthermore, this research analyzed a high-profile prize event that initiated the industry emergence, to propose a supplemental set of processes, describing how prizes influence industry emergence. The current research proposes that institutional activities contribute primarily to the accumulation of sociopolitical legitimacy, and resource endowment activities contribute primarily to cognitive legitimacy. Both forms of legitimacy are a significant moderator of interactions between the three infrastructure elements. Furthermore, prizes positively contribute to sociopolitical legitimacy, positively moderate the creation of cognitive legitimacy, and positively moderate many steps in the business development cycle. The proposed processes identify the steps of legitimacy creation and industry emergence. This research provides new insights into the industry emergence and evolution processes, for entrepreneurs, managers, policy-makers, and for developing countries on the African continent.
3

The role of technical efficiency & productivity evolution in port development : an application to Caribbean Small Island Developing States (SIDS) ports

Julien Brown, Shelly-Ann January 2018 (has links)
Economic growth has continually remained an objective of every nation, particularly for lesser-developed countries such as the Small Island Developing States (SIDS). According to an UNCTAD (2014) report on “Small island developing States: Challenges in transport and trade logistics,” one way of attaining economic growth is by focusing attention on tackling the challenges faced by transport and trade logistics (UNCTAD, 2014). Given the unique characteristics of SIDS nations, notably high import content, insularity, geographic remoteness and small economies, populations and areas, all of these factors emphasize the importance of having “well-functioning, reliable, sustainable and resilient transportation systems, in particularly the maritime sector for SIDS development and international trade survival” (UNCTAD, 2014). Such policies would be consistent with what is generally referred to as ‘supply led' economic development, where improvements in transport related infrastructure result in economic growth (Cowie, 2010). Such an approach assumes there is a latent demand for a country/region's produce, but this is being prevented from being exploited, because of inefficiencies in, or a lack of adequate port infrastructures and human resources. These challenges constitute a key policy concern for the sustainable development of SIDS' ports and become not only a port concern but a national concern, as directing adequate funding to improving port efficiency, has become a top priority (UNCTAD 2014). For instance, according to the United Nations (UN), “benchmarks need to be established to monitor and improve port performance ... ”(UNCTAD, 2014), while SIDS such as the Caribbean Community (CARICOM) aim to improve their maritime sector, claims that “...enhancing the maritime sector has the potential to fuel CARICOMs trade, increase port productivity and generate significant cost savings...” (CARICOM, 2013). This research aims to measure, analyse and compare port efficiency and productivity over a ten-year period (2001-2011), on 69 seaports, using non- parametric DEA based tests. The primary focus is on the Caribbean SIDS (referred as the Caribbean for abbreviation purposes), benchmarked against top ports. This is investigated from the realm of how port policy and development strategies have affected efficiency and productivity over time. This research attempts to present greater insight into SIDS ports, with reference mainly to the Caribbean, whilst the approach can become a springboard, implemented on other port types and regions of the world. Additionally, its practical contribution may become a better guide for international (UNCTAD), regional (CARICOM) and country level decision makers. Evolutionary technical efficiency and productivity for the Caribbean's Small Island Developing States (SIDS) ports, during the period 2001-2011 are evaluated. Moreover, the region's port development initiatives are assessed over the same period. Top ports received an average efficiency of 72%, outperforming the overall 66% average for Caribbean ports as was expected. Interestingly enough, efficiencies for top ports decreased on average by 0.5% per annum over the decade, whilst increases of up to 0.7% were found for Caribbean ports. Moreover, the region's productivity grew by 3.2%, compared to their larger top counterparts, of up to 2% per annum. This research concludes that trade volumes play an integral part in affecting efficiency and productivity. Additionally, given port development initiatives, the Caribbean's progresses in efficiency/productivity has been mainly the effects of scale and technical progress respectively. Since these ports are usually smaller scale and yield lesser throughput (compared to their larger counterparts), when they begin to grow, the focus is on enlarging their production scales, however, this is at the expense of adjusting internal practises. Compared to TOP ports, increases in productivity is solely the consequence of technical progress. Since these are usually larger scale ports and so likely yield more throughput, will likely be operating at the size of decreasing returns to scale. This suggests, that they are not properly focusing on internal practices and sizing their production scales to accommodate the rise in technical progress. The research findings can potentially influence decisions made by local and regional authorities in the Caribbean, when it comes to port development initiatives, as it provides an overview of efficiency/productivity, but more so that which impedes these progresses.

Page generated in 0.1492 seconds