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  • 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

Retrospective serological and virological survey of influenza D virus among cattle in Sweden

Ahlgren, Evelina January 2019 (has links)
Respiratory diseases in cattle can cause economic losses due to the decreased dairy and meat production. Virus is the main reason for these diseases. Symptoms can be fever, cough and nasal discharge.     Influenza are a group of viruses belonged in the Ortomyxoviridae family. The big influenza groups are influenza A, B and C. The viruses can cause respiratory signs, and mammals can be affected. Recently a new influenza virus was found in the United States. The influenza virus was found in swine, but the natural host was later considered to be cattle. The virus was named influenza D. Different studies worldwide have confirmed the virus in a variety of regions. Antibodies have also been reported.     In this study, virologic and serologic methods were used to detect if influenza D circulates among cattle in Sweden. The serologic method performed was indirect ELISA. Serum and milk samples were investigated in the ELISA method. For the virologic detection a real-time RT-PCR was made, with a variety of study material.     Antibodies against influenza D were found in both serum and milk samples. No virus was found in the real-time RT-PCR. In Sweden the animal keeping is different compared to several other nations. For instance, the conditions of health and hygiene are better in Sweden, this may be an important cause of a system more resistant against spreading of infections. Influenza D could be more common in Sweden, but in that case further researches are needed to determine the prevalence.
2

HPM-vapen vs. kommersiell UAV

Eriksson, Kjell January 2016 (has links)
Detta arbete i militärteknik studerar om högeffektpulsad mikrovågsstrålning kan uppnå verkan mot kommersiella UAV. Analysen genomförs på två olika icke-dödliga HPM-vapen. Data hämtas från ett scenario där vapenverkan innebär hög risk för skada på tredje man. En Försvarsmaktsstudie har konstaterat att Luftvärnsbataljon saknar förmåga att verka mot små UAV.Dagsaktuell kunskap har inhämtats om scenariots miljö samt från forskning och industri genom studiebesök. Inhämtad kunskap har möjliggjort en logisk-matematisk parameterstudie på ett scenario med militärtekniskt perspektiv. Analysens slutsatser är att kommersiella UAV innehar låg skyddsnivå, att beslut om insats underlättas i alla miljöer och att en elektronisk sköld i form av HPM-vapen skyddar en stor volym samtidigt. HPM-vapen kan inte som ensamt vapensystem stå för skydd och uppnå säkerställd verkan mot kommersiell UAV. HPM-vapen kan däremot komplettera övriga verkanssystem och göra luftförsvaret starkare genom system av system. HPM-vapen kan bidra till att minska ett befintligt förmågeglapp mot kommersiella UAV. / This paper in military technology discusses whether high power microwaves can affect commercial UAVs. Two non-lethal HPM-weapons are analyzed. The data is collected from a scenario where there is a high risk for collateral damage. A Swedish Armed Forces study stated that the Air Defence Battalion lacks ability to affect small UAVs. The latest knowledge is obtained from the environment in the scenario, from research and from the industry. This knowledge has enabled a logical-mathematical parametric study on the scenario within a military perspective. The result of the study is the assessment that commercial UAVs are assessed to have low protection factor, facilitates decision to act in all environments and provides an electronic shield protection of a large surface at the same time. HPM-weapons can´t stand as a single system for protection against commercial UAVs and achieve guaranteed effect. However, HPM-weapons can complement other weapon systems and thus make the air defense stronger through systems of systems. HPM-weapons can reduce the capability deficiency against commercial UAVs.
3

A Brazilian - Swedish Relationship : How to Establish a Successful International Joint Venture

Dalaryd, Magnus, Mayer, Daniel January 2012 (has links)
Due to the nature of globalization, new strategies have been designed to break into new markets. Joint Venture is a common strategy to enter new markets and by using a Joint Venture, companies share risks and establish new contacts with local knowledge. Brazil is a market where foreign investors gain more and more interest. Brazil's economy is growing fast and made well during the global financial crisis. The middle class in Brazil is constantly growing and for the first time, poverty is not a majority in Brazil.In an International Joint Venture (IJV), it is usually a foreign company establishing a partnership with a local company. Often, IJVs fail because companies have problems collaborating, depending on different variables. In this thesis, we chose to analyze the cultural barriers in a Brazilian-Swedish IJV on the Brazilian market. The purpose of this thesis is to gain an understanding and describe cultural barriers in an IJV partnership, and high-light those to increase the chances for successful IJVs between Brazilian and Swedish companies in the future.This thesis is qualitative, with an abductive approach, in order to gain a deeper and better understanding of experienced barriers. We have chosen to see culture from both a national and an organizational perspective as earlier research has showed that national culture affects the organizational culture within an IJV. Using Hofstede's (1991) four dimensions of national culture as a supplement to Wilson’s (2001) four factors influencing the organizational culture, we have conducted four interviews in two Swedish-Brazilian IJV companies located in São Paulo, Brazil. The companies we have chosen to interview have been small or medium-sized manufacturing. Interviews were conducted face-to-face in a comfortable environment for all respondents. In our analysis, we used matrices to make it easier to see what differences and/or similarities there are between the case-companies.Results of this study, demonstrate that the experiences from the two case-studies are well in line with each other. The organizational structure in Brazil has been perceived as more hierarchical than the Swedish vertical and more open structure. This in turn, has strengthened the differences in communication between managers and employees, which been perceived as more top-down in Brazil than in Sweden. Our conclusion is that cultural barriers have been perceived, in the perception of the leaders’ expected behavior, language barriers, differences in planning and management of uncertain situations, Brazil's more family-oriented society and close relationship between private life and work in the Brazilian market.Several of these barriers have been experienced during the early start-up of an IJV, something we believe increases the importance of being well prepared for cultural barriers that may arise. The importance of an agreement upon the structure and policies at the company at an early stage is crucial, to reduce future possible conflicts. Show mutual respect and understanding for one's partners’ culture and experienced cultural barriers, use these to avoid any negative effects, and instead create a positive impact for the IJV. / Minor Field Study

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