2,734 research outputs found

    Computerized structural mechanics for 1990's: Advanced aircraft needs

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    The needs for computerized structural mechanics (CSM) as seen from the standpoint of the aircraft industry are discussed. These needs are projected into the 1990's with special focus on the new advanced materials. Preliminary design/analysis, research, and detail design/analysis are identified as major areas. The role of local/global analyses in these different areas is discussed. The lessons learned in the past are used as a basis for the design of a CSM framework that could modify and consolidate existing technology and include future developments in a rational and useful way. A philosophy is stated, and a set of analyses needs driven by the emerging advanced composites is enumerated. The roles of NASA, the universities, and the industry are identified. Finally, a set of rational research targets is recommended based on both the new types of computers and the increased complexity the industry faces. Computerized structural mechanics should be more than new methods in structural mechanics and numerical analyses. It should be a set of engineering applications software products that combines innovations in structural mechanics, numerical analysis, data processing, search and display features, and recent hardware advances and is organized in a framework that directly supports the design process

    Users guide for guidance and control Launch and Abort Simulation for Spacecraft (LASS), volume 1

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    The mathematical models and computer program which are used to implement LASS are described. The computer program provides for a simulation of boost to orbit and abort capability from boost trajectories to a prescribed target. The abort target provides a decision point for engine shutdown from which the vehicle coasts to the vicinity of the selected abort recovery site. The simulation is a six degree of freedom simulation describing a rigid body. The vehicle is influenced by forces and moments from nondistributed aerodynamics. An adaptive autopilot is provided to control vehicle attitudes during powered and unpowered flight. A conventional autopilot is provided for study of vehicle during powered flight

    Assessment of International Tourists\u27 Perception on Local Foods in Tanzania

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    Consumption of local food is broadly recognized as an essential part of tourists’ experience. Locally distinctive food can be important both as a tourism attraction in itself and in helping to shape the image of a destination. Local food experiences have the potential to contribute considerably to sustainable development, help maintain regional identities and support agricultural diversification. While local foods have the potential to reduce poverty in rural communities, their image and perception to tourists remain largely unexamined. The aim of this paper is to evaluate the way international tourists perceive local food in Tanzania. Data was collected using questionnaires (N = 540) at Kilimanjaro International Airport (KIA), which serves tourists who have just completed their visits from the most popular “Northern Circuit” of Tanzania National Parks. The findings show that (74.5%) of the respondents agreed that overall local food was of good quality and (58.5%) agreed that local food was safe to eat. However, respondents felt strongly that the hotels they stayed in did not provide many varieties of local foods (42.3%) or sufficient information about local foods (36.5%)

    International Tourism: An Unrecognized Potential in Rural Tourism Development

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    This paper presents an overview of international tourism and its role in rural economic development. It briefly describes the current approaches to rural economic development followed by a brief look at international tourism 1n the United States, and the potential for tourism in rural areas is examined. An initial step in assessing the extent to which international tourists visit rural America is determining the factors which currently attract those visitors to rural areas. The purpose of this paper is to profile potential international travelers to rural areas

    Issues in Rural Community Tourism Development

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    Policy makers are turning to tourism as a potential industry force that may bring both economic and demographic stability to American rural communities. The systematic planning and appropriate utilization of community related physical, economic, and socio-cultural attributes is the key to the establishment of sustainable tourism. This paper focuses on several issues that are increasingly recognized as critical factors in the community system. Both quality of life and sense of place are emphasized. The paper concludes with broadly defined guidelines for future planning toward sustainable development

    Crisis Management in Tourist Destinations

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    Whether natural or caused by people, disasters have been and continue to be a part of life that communities must deal with. Tourism destinations are especially vulnerable to disaster occurrences due to their economic dependence on visitors and the need to maintain a positive image of attractiveness and safety for continued success. The past decade has witnessed numerous natural disasters in tourist destinations around the world; therefore, community leaders, local governments, and major industries need to be prepared for the worst. The 1989 Hurricane Hugo experience in Myrtle Beach, South Carolina was managed by a local non-profit organization comprised of volunteer community and industry leaders. The Hugo experience demonstrated the need to have a plan of action to follow after disaster occurrences. Telephone interviews were conducted with tourism leaders around the country and written inquiries were made to locate a tourism crisis management plan. The lack of information led to the development of the Myrtle Beach Tourism Crisis Management Manual, to assist the travel and tourism industry respond to and manage natural disasters in an effective manner
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