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Aerodynamic Analysis of Variable Geometry Raked Wingtips for Mid-Range Transonic Transport AircraftJingeleski, David John 21 December 2012 (has links)
Previous applications have shown that a wingtip treatment on a commercial airliner will reduce drag and increase fuel efficiency and the most common types of treatment are blended winglets and raked wingtips. With Boeing currently investigating novel designs for its next generation of airliners, a variable geometry raked wingtip novel control effector (VGRWT/NCE) was studied to determine the aerodynamic performance benefits over an untreated wingtip. The Boeing SUGAR design employing a truss-braced wing was selected as the baseline. Vortex lattice method (VLM) and computational fluid dynamics (CFD) software was implemented to analyze the aerodynamic performance of such a configuration applied to a next-generation, transonic, mid-range transport aircraft. Several models were created to simulate various sweep positions for the VGRWT/NCE tip, as well as a baseline model with an untreated wingtip. The majority of investigation was conducted using the VLM software, with CFD used largely as a validation of the VLM analysis. The VGRWT/NCE tip was shown to increase the lift of the wing while also decreasing the drag. As expected, the unswept VGRWT/NCE tip increases the amount of lift available over the untreated wingtip, which will be very beneficial for take-off and landing. Similarly, the swept VGRWT/NCE tip reduced the drag of the wing during cruise compared to the unmodified tip, which will favorably impact the fuel efficiency of the aircraft. Also, the swept VGRWT/NCE tip showed an increase in moment compared to the unmodified wingtip, implying an increase in stability, as well providing an avenue for roll control and gust alleviation for flexible wings. CFD analysis validated VLM as a useful low fidelity tool that yielded quite accurate results. The main results of this study are tabulated "deltas" in the forces and moments on the VGRWT/NCE tip as a function of sweep angle and aileron deflection compared to the baseline wing. A side study of the effects of the joint between the main wing and the movable tip showed that the drag impact can be kept small by careful design. / Master of Science
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Study Of Aerodynamic Effectiveness Of Wing Tip Sails For Gust Load AlleviationAgarwal, R K 11 1900 (has links) (PDF)
No description available.
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Foreign Direct Investment and its Implications for Economic Growth and Poverty Alleviation in Southern AfricaGladys Chimpokosera Unknown Date (has links)
One of the most visible indicators of the increasing global integration of the world economy over the past decade or so has been the phenomenal growth of Foreign Direct Investment (FDI) flows and expansion of cross-border activities of multinational enterprises. FDI inflows are considered as channels of entrepreneurship, technology, management skills, and resources that are scarce in developing countries and Southern Africa in particular. Recent developments in growth theory highlight the importance of improvements in technology, efficiency and productivity in simulating growth. In this regard, FDI’s contribution to growth comes through its role as a conduit for transferring its advanced technology from the industrialized to the developing economies and as such FDI inflows could help in the industrialization of the host countries. For instance, Findlay (1978) postulates that FDIs increases the rate of technical progress in the host country through a “contagion” effect from the more advanced technology and management practices used by foreign firms.
Since FDI is said to be the most stable source of private capital for developing and transition economies, attracting FDI is at the top of the agenda of such economies around the world as they aim to reduce poverty that is deep and widespread.
The paper will look at FDI and its contributions; discuss the relationship between FDI and economic growth; explore the determinants of FDI and economic growth; consider the implications of FDI to economic growth and poverty alleviation; examine Taiwan’s experience when its development was closer to current levels in Africa and Southern Africa in particular; and explore how the Southern African region can attain economic growth through FDI and alleviate its deep and widespread poverty. In trying to assess the extent to which FDI contributes to construction of production facilities, infusion of innovative technologies, management strategies, workforce practices, new employment, and skill transfer, the paper seeks to shed light on appropriate policies to pursue in order to encourage high volumes of FDI and their likely implications for economic growth and poverty alleviation.
While economic growth is not synonymous with economic development, it is at least necessary. Provided that mechanisms exist to facilitate some trickle-down of the benefits of economic growth to the impoverished, economic growth can aid in poverty reduction. The most important mechanism by which trickle-down occurs is via employment-creating economic growth. In this way, it is possible that, if FDI serves as a catalyst for economic growth, it will stimulate development and contribute to alleviating poverty (Lipsey, R., 2000).
David Dollar (2001) states that Globalization has been a force for growth and poverty reduction in a diverse group of countries and defines globalization as the growing integration of economies and societies around the world as a result of flows of goods and services, capital, people, and ideas. He claims that integration accelerates development and reduces gaps between the developed and developing countries by raising productivity in the developing world. In this way globalization can be a powerful force for poverty reduction. FDI is one element that links the Southern part of Africa to the global economy and as a World Bank report (2001) shows that rapid economic growth and poverty reduction are positive aspects of globalization, the volume of FDI attracted will have an influence on whether the Southern Africa’s poor can benefit from the globalization of markets.
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Limitations of the national policy on housing with respect to poverty alleviation in BotswanaBogorogile, Gobusamang 15 May 2008 (has links)
ABSTRACT
This paper describes the limitations of the housing policy in Botswana when dealing with
poverty alleviation. Botswana is faced with high levels of poverty that does not conform
to the country’s economic success since independence. Very few opportunities exist for
the urban poor to earn a living and work themselves out of poverty. Efforts to address
poverty in the past yielded mixed results and failed the urban poor more especially that
the interventions were biased towards rural areas. Evidence has been provided that
housing has a critical role to play in poverty alleviation. The Government of Botswana
has put in place housing projects (one of which is used for this enquiry) through which
poverty can be addressed alongside other human needs such as shelter. An enabling
environment has to be created for the successful exploitation of housing for poverty
alleviation. It is therefore imperative that the government ensures the existence of such an environment.
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The Potential Impact of Domestic Tourism on Rwanda’s Tourism EconomyMazimhaka, Joan 21 February 2007 (has links)
Student Number :0418716K -
MA research report -
School of Geography, Archaeology and Environmental Studies -
Faculty of Humanities / As a continuously growing industry worldwide, tourism has often demonstrated its role as a
vital tool in the advancement of economies through direct domestic and foreign exchange
earnings and through the employment and investment opportunities it can generate. African
countries, mainly in sub-Saharan Africa, often over-reliant on one or two sectors for
economic development, have recognised the potential of the tourism industry to diversify
local economies and contribute to poverty alleviation, economic regeneration and stability,
affording many Africans the opportunity to participate in and benefit from tourism.
The participation of local populations in Africa’s tourism industries, however, is often limited
to employment opportunities. Travel by local tourists is often overlooked by members of the
tourism industry, and is often considered a luxury by many in the local population. The role of
domestic tourism and its importance for the creation of a sustainable tourism industry has
been widely acknowledged, but limited writings on the subject exist and few tourism policies
include domestic tourism, neglecting its potential.
The emergence of a new African middle-class, equipped with more of a disposable income
and influenced by Western lifestyles, has proven that such potential does in fact exist. Those
living in Africa as well as members of the Diaspora have shown more of an interest in leisure
travel and represent a new tourism market. Globally, the impact of domestic tourism has
been shown to have had a great impact on the tourism economies of several countries,
demonstrating that African countries can only serve to benefit from participating in domestic
tourism.
This research report provides a case study of Rwanda, an African country emerging from
war and devastation, aiming to rebuild itself economically, socially and politically. The
country has chosen tourism as one of its main economic drivers for poverty reduction and
economic development. While the industry is succeeding, an over-reliance on international
visitors in such a volatile region threatens the sustainability of the industry. The development
of a domestic tourism industry, as has been demonstrated in other countries, offers the
opportunity to generate a more diverse and economically sustainable domestic tourism
industry. This research focuses on the potential impact of such a domestic tourism industry
on Rwanda’s tourism economy and as a result, on the country’s economy as a whole.
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The impact of Local Economic Development on the livelihood of communities in Ba-Phalaborwa Municipality, Mopani District, Limpopo Province, South AfricaSeduma, Matee Piet January 2011 (has links)
Thesis (M. Dev) --University of Limpopo, 2011 / Literature has shown that focusing on local economic development is one of the best ways to alleviate poverty and unemployment. Municipalities have been tasked with the responsibility of coordinating local economic development initiatives to bring unemployment and poverty under control. This study highlighted the impact of local economic development on the livelihood of communities in Ba-Phalaborwa Municipality, Mopani, Limpopo Province within a qualitative paradigm. A questionnaire was used to collect data from respondents with key research findings highlighted in Chapter 4 and a summary of the findings presented in Chapter 5. The study recommends, based on its findings, the importance of local economic development initiatives in poverty and unemployment alleviation.
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Sustainability of poverty alleviation: a case of Thogoaneng and Maratapelo villages in Limpopo Province, South AfricaMashiane, Matsimela Joas January 2008 (has links)
Thesis (M.Dev.) --University of Limpopo, 2008 / Refer to document
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Impact of poverty alleviation projects on rural women in Bohlabela : Limpopo ProvinceTshabangu, Siphiwe Noster January 2005 (has links)
Thesis (M.Dev.) --University of Limpopo, 2005 / The purpose of this study was to explore women’s involvement in poverty alleviation projects and to examine the benefits that are derived from such projects. The Phutuma Development Project and Gottenburg Women’s Group are the projects which were studied. The methods used to conduct this study involved collecting data through questionnaires and interviews. The various stakeholders, project members as well as government officials from the departments of Health and Social Development were interviewed.
This study is significant in that it can help the government in its efforts to assist the poor live a decent life, and to provide better services to communities. This study uncovers the kind of challenges that government departments and communities face when setting up poverty alleviation projects. The study recommends how this should be done to achieve optimum results.
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The impact of Mabunda Citrus Project on poverty alleviation in the community of Xitlakati in the Greater Giyani municipality of Mopani District in Limpopo ProvinceMashila, Daphney Musumbuluku January 2011 (has links)
Thesis (M.Dev.) --University of Limpopo, 2011 / The aim of the study was to investigate the impact of a community-based agricultural project, the Mabunda Citrus Project in the Greater Giyani Municipality of Mopani District, Limpopo Province, on poverty alleviation and community development within the framework of rural development in the Agricultural Sector. Although there is a general view that community-based agricultural projects have an impact on community development in the literature, very little is known about the impact of community initiatives in Limpopo Province. This study project therefore sought to fill in this knowledge gap and highlight prospects and challenges of these endeavours.
Using a qualitative case study design, a series of interviews schedules and focus group sessions were conducted among 21 (n=21) direct beneficiaries who each had about 10 hectares orchard, seven (n=7) civic community structure and seven (n=7) youth structure committee members and one (n=1) Deputy Chief in the Xitlakati Community in the Greater Giyani Municipality. Data collected over a period of a week were captured via field notes and analyzed using thematic and content analyses.
The results of the study show three interrelated results. First, the beneficiaries included in the study met the requirements of people below the poverty line, save for one volunteer teacher. Secondly, the findings show that although the project does not meet all the needs of the beneficiaries, it does show many positive impacts on poverty alleviation. This is illustrated by increased employment of the beneficiaries and seasonal workers, donation of uniforms to poor children in both primary and secondary schools in the community, provision of oranges for consumption to workers, deputy chief and schools as well as the acquisition of a community hall in the Xitlakati community.
Given these positive findings above, the researcher concluded that community-based agricultural projects in Limpopo are a necessary condition for poverty alleviation in rural areas. However, the researcher has observed that structural and practical challenges, as outlined in the study, may derail the project from reaching its full potential. It is therefore recommended that a full time specialized technician be provided, the beneficiary selection criteria to include more females and disabled persons be revised; budget and salaries be discussed in a transparent way, among other potential threats. Since this is a qualitative research, the conclusions derived are limited due to the sample size. Further quantitative research is necessary to provide quantitative measures of the impact of the project on poverty alleviation.
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Efficacy of Denning in Alleviating Coyote Depredations upon Domestic SheepTill, James A. 01 May 1982 (has links)
Bands of domestic sheep lambing on the open range in south central Wyoming were monitored for predator losses prior to and following coyote (Canis ·1atrans) removals. Experimental treatments, including 1) no removal (control), 2) removal of 2 adults and their pups, and 3) removal of pups only, were replicated 15 times each. Number of predation incidents (events) was reduced 98.2% by removing adults and pups. The number of sheep killed was reduced by 98.8%. Removing only litters of pups resulted in a decrease of 87.7% total kills decreased 91.6%. in predation incidents, while Overall, 23 of 30 predation sequences terminated immediately, while in all cases predation ceased within 3 days after removing adult coyotes and/or their pups. In terms of "offending individuals", denning can be a very selective means of coyote depredation control. The data suggest that removing only litters of offending adults can be nearly as effective in stopping losses as removing the adults. Biological parameters such as litter size did not appear to influence kill frequencies. A cost-effectiveness analysis was calculated.
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