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Real-Time Estimation of Aerodynamic ParametersLarsson Cahlin, Sofia January 2016 (has links)
Extensive testing is performed when a new aircraft is developed. Flight testing is costly and time consuming but there are aspects of the process that can be made more efficient. A program that estimates aerodynamic parameters during flight could be used as a tool when deciding to continue or abort a flight from a safety or data collecting perspective. The algorithm of such a program must function in real time, which for this application would mean a maximum delay of a couple of seconds, and it must handle telemetric data, which might have missing samples in the data stream. Here, a conceptual program for real-time estimation of aerodynamic parameters is developed. Two estimation methods and four methods for handling of missing data are compared. The comparisons are performed using both simulated data and real flight test data. The first estimation method uses the least squares algorithm in the frequency domain and is based on the chirp z-transform. The second estimation method is created by adding boundary terms in the frequency domain differentiation and instrumental variables to the first method. The added boundary terms result in better estimates at the beginning of the excitation and the instrumental variables result in a smaller bias when the noise levels are high. The second method is therefore chosen in the algorithm of the conceptual program as it is judged to have a better performance than the first. The sequential property of the transform ensures functionality in real-time and the program has a maximum delay of just above one second. The four compared methods for handling missing data are to discard the missing data, hold the previous value, use linear interpolation or regard the missing samples as variations in the sample time. The linear interpolation method performs best on analytical data and is compared to the variable sample time method using simulated data. The results of the comparison using simulated data varies depending on the other implementation choices but neither method is found to give unbiased results. In the conceptual program, the variable sample time method is chosen as it gives a lower variance and is preferable from an implementational point of view.
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Measurement of the invisible width of the Z boson using the ATLAS detectorRyder, Nicholas Charles January 2013 (has links)
The invisible width of the Z boson is its partial width to neutrinos and is a well known Standard Model quantity. A direct measurement of the Z boson’s invisible width has been performed using the ATLAS detector. The width was measured to be Γ(Z → inv) = 481 ± 5(stat.) ± 22(syst.), which rivals the precision of the direct measurements performed by the LEP experiments. Such a precise was measurement performed by measuring the ratio of Z → νν to Z → ee events and correcting for the differences between the neutrino and electron selections. The measurement is sensitive to any non Standard Model interactions with a jet(s) + undetected particle final state. No evidence was found for a deviation from the Standard Model, however improvements have been suggested to allow more sensitivity to new phenomena at high energies.
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IBMs stordators framtid i en molnbaserad IT värld : Kommer IBMs stordator att överleva ytterligare ettparadigmskifte eller har den spelat ut sin roll? / IBM ́s mainframe computers future in a cloudbased IT environment : Will IBM ́s Mainframe computer survive another paradigmshift, or is it on its way out?David, Östling January 2016 (has links)
IT analytiker har många gånger gett IBMs stordator en dödsdom. Redan 1991 skrev denerkände kritikern Stewart Alsop, dåvarande chefredaktör på InfoWorld att den sista stordatornskulle tas ur bruk den 15 mars 1996. Det visade sig att detta uttalande var felaktigt, vilketStewart Alsop även erkände i InfoWorld bara dagar innan hans förutsägelse skulle ha infallit.När vi nu går in i ytterligare ett paradigmskifte i och med att många tjänster går över tillmolnet, ställer jag i denna uppsats frågan om IBMs stordator har en framtid i en molnbaseradIT värld, och hur den i så fall ser ut. Syftet är att genom litteraturstudier och intervjuer undersöka om IBMs stordator kan överlevaytterligare en genomomgripande teknikrevolution eller om den har spelat ut sin roll.Undersökningen mynnar ut i slutsatserna att IBMs stordator har en stark position i dagsläget,framförallt inom bank och finanssektorn d.v.s. inom branscher med speciellt höga kravbeträffande tillgänglighet, skalbarhet, och säkerhet. Sannolikt har stordatorn en viktig roll attspela även för framtidens satsningar i molnet. IBM erbjuder redan idag molnlösningar sominkluderar mainframes, och det framgick även i de intervjuer som gjordes på IBM, att de seren ljus framtid för IBMs stordatorer. De menar att IBM inte bara följer med, utan även är medoch leder utvecklingen inom molntjänster, och att det är främst för de öppna standarderna somLinux och Unix som IBM kommer att ha den ljusaste framtiden. Det faktum att IBM varje årinvesterar miljardbelopp i utvecklingen av sina stordatorer talar också sitt tydliga språk, d.v.s.att IBM fullt ut verkar tro på att stordatorn har en viktig roll att spela i den molnbaserade ITvärldsom just nu växer fram
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The concept of mission in the Hungarian Reformed Church in Transylvania, 1895-1950Horváth, Levente László January 2009 (has links)
No description available.
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Konkursriskanalys av bolag noterade på Stockholmsbörsen : Ett test av Edward I. Altmans Z-scoremodellLöf, Marcus, Kullerback, Karl January 2008 (has links)
<p><p>Tidigare forskning tyder på att det med relativt stor träffsäkerhet går att förutspå en finansiell kris för ett företag. Finansiell kris har man då definierat som konkurs och använt sig av finansiella nyckeltal för att räkna fram ett specifikt värde som i sig skulle indikera ifall ett bolag stod inför hög, medel eller låg risk för att försättas i konkurs.</p><p>I denna uppsats studeras nio bolag som avnoterats från Stockholmsbörsen på grund av konkurs under åren 1997 till 2008. Detta i syfte att testa om de tidigare vedertagna teorierna kring konkursprediktion även kan appliceras med framgång på bolag noterade på Stockholmsbörsen. Modellen som författarna använt sig av kallas Z-scoremodellen och är en modell innehållande fem viktade finansiella nyckeltal, framtagen av professor Edward I. Altman. Modellen genererar ett så kallat Z-värde som enligt teorin ska indikera ett företags finansiella tillstånd.</p><p>De nio undersökta konkursbolagen har i studien jämförts med åtta bolag (i studien kallade kontrollbolag) som under det senaste året istället ökat sitt värde på marknaden i form av ökad börskurs. Detta med syfte att kontrollera om dessa bolag får högre Z-värden än de undersökta konkursbolagen, såsom modellen påvisar.</p>Vår studie har visat att det finns tydliga tendenser som pekar på att modellen har betydande träffsäkerhet men att den inte i varje enskilt fall går att förlita sig på.</p>
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Towards open access : managerial, technical, economic and cultural aspects of improving access to research outputs from the perspective of a library and information services provider in a research universityPinfield, Stephen January 2011 (has links)
For academic research to release its value, it has to be communicated. It is essential, if research is to flourish, that the various forms of research communication, including journal articles and similar research outputs, are as easily and widely available as possible. The publications in this submission, produced between 1998 and 2010, all discuss major aspects (managerial, technical, economic and cultural) of improving access to research outputs in order to support research activity in higher education institutions. The later works focus in particular on the issue of ‘open access’ (OA) publishing and dissemination. The publications investigate the why and how of OA. Firstly, they examine the potential benefits (and dis-benefits) of OA for the research community and other stakeholders. Secondly, they discuss how OA systems and services might operate in practice. The earlier works on OA focus on repositories, particularly institutional repositories. Some of the later publications bring into consideration OA journals and their (potential) ongoing relationship with repositories. The publications are written from the perspective of a library and information services provider in a research university. They report on ground-breaking action-based research-and-development work: setting up innovative demonstrator systems, developing new business processes, and designing novel organisational policies. Possible future scenarios are modelled and analysed. It is shown that these activities have made a significant impact on wider professional practice, as well as contributing to the research literature, as OA has became more mainstream. Major themes discussed include managerial challenges associated with implementing OA services; technical issues relating to the development of systems and standards; economic factors covering costs, funding streams and business models; and cultural issues, including disciplinary differences. These are examined in relation to different stakeholder groups at institutional, national and system-wide levels. Other key themes include intellectual property rights and quality assurance. A clearer picture of possible research-communication futures incorporating OA is developed.
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The role of online support communities for people experiencing infertilityMalik, Sumaira January 2010 (has links)
People faced with infertility will often experience a strong need for psychosocial support and guidance; a need which is not always adequately met by existing sources of support. The growth in access to the Internet over recent years has opened up new opportunities for people affected by infertility to seek support, advice, and information through the means of an online support community. These online communities can potentially play an important role in addressing the support and information needs of people experiencing infertility; by improving their ability to access peer and professional support. Additionally, online communities may offer a more welcoming and comfortable environment in which these individual's can share their infertility experiences and concerns. This thesis adopted a triangulated approach to research the potential role of online communities in helping people cope with the challenges of infertility. An initial qualitative study was conducted with 95 people accessing online infertility support communities to explore their motives, perceptions, and experiences of online support seeking. Responses revealed that participants especially valued the unique characteristics of computer-mediated communication (e.g. anonymity, asynchrony etc), which appeared to facilitate their ability to access and seek support. In addition, there were a number of psychosocial benefits associated with the online support communities, which appeared to aid the participant's ability to cope with their infertility experiences. Key benefits included reduced feelings of isolation and loneliness, improvements in marital relationships and access to a unique and valuable source of emotional and informational support. This study was followed by a content analysis of the therapeutic and self help mechanisms used in 3,500 messages posted to a popular UK online infertility support community. Results from this stage suggested that the key functions of the online support community were to exchange support and empathy and provide a forum for individuals to share their personal experiences related to infertility. Results also revealed that on the whole communication within the online support community was extremely positive and constructive, offering group members the opportunity to utilise many of the therapeutic and self-help mechanisms that are known to be beneficial to people using face-to-face support networks. The issues and questions raised in these initial studies were further examined in a larger scale survey with 295 users of online infertility support communities. This study quantitatively examined the use and experience of online infertility support communities and how this relates to psychosocial well-being. Results revealed that the majority of participants considered there to be a range of important benefits from accessing online communities. However the study also identified a number of potential disadvantages to accessing online infertility support communities, which appeared to have an impact on the experiences and psychosocial wellbeing of infertile individuals. The theoretical, methodological and practical implications of these findings are discussed.
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Measurement of the Z—>TlTh cross-section and search for the standard model vector boson fusion produced Higgs —>TlTh at ATLASLarner, Aimee Bridget January 2011 (has links)
This thesis presents a cross-section measurement of the Z -+ TeTh process performed using the ATLAS detector at the Large Hadron Collider at CERN. The data used were collected at a centre-of-mass energy of 7 TeV during 2010 and corresponds to an integrated luminosity of 36 pb-I. This measurement uses the final state where one T lepton decays leptonically, to an electron or muon, plus neutrinos, and the other T lepton decays hadronically. The "(* / Z -+ a, It and di-boson background processes are estimated using Monte Carlo simulation, the W -+ TV Monte Carlo background prediction is estimated using a semi data-driven method. The multijet background is estimated with a fully data-driven 'ABCD' method using three exclusive control regions built by inverting uncorrelated requirements on the isolation of the electron or muon and the product of the electric charge of the identified electron or muon and hadronically decayed T lepton. The measured cross-sections in each channel are corrected for the individual branching ratios and yield the total cross-section a(Z -+ TT, minv 66 - 116 GeV) = 1142 ± 135.5(stat.) ± 206.2(syst.) ± 40. 19(1umi.) ± 3.6(theo.) pb for the electron channel and a(Z -+ TT, minv 66 - 116 GeV) = 857.6 ± 81.4(stat.) ± 132.5(syst.) ± 30.19(lumi.) ± 2.8(theo.) pb for the muon channel, where the invariant mass of the Z boson is between 66 and 116 GeV. These are in good agreement with the theoretical prediction of960 ± 49.5 pb. Performing a measurement of a well-known Standard Model process using the ATLAS de- tector in this new high energy regime is essential for validating the T lepton identification in particular, which is essential for any new physics search such as H -+ TeTh' A cut-based analysis for the Vector Boson Fusion produced Higgs boson decaying to two T leptons channel is introduced and the possibility of using the more complex analysis technique, the Matrix Element method, to increase sensitivity is discussed.
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Efficacy of Nikkomycin Z for respiratory coccidioidomycosis in naturally infected dogsShubitz, Lisa, Roy, Michael E, Nix, David, Galgiani, John N. 10 1900 (has links)
Nikkomycin Z (NikZ) is a chitin synthase inhibitor with antifungal efficacy against Coccidioides spp. and other endemic fungi. Dogs suffer a rate and range of natural coccidioidomycosis similar to humans and were considered an excellent model for initially testing NikZ against naturally acquired disease. Twelve dogs with coccidioidal pneumonia that had been present for an average of three months were treated with 250 mg (5 - 15 kg) or 500 mg (> 15 - 30 kg) twice daily for 60 days. Nine dogs completed the course of treatment and seven dogs had improvement in disease based on radiographs, clinicopathological parameters, physical examination findings, and subjective assessment by the owners; three dogs had resolution or near resolution of disease. Based on this small study, NikZ shows efficacy to treat naturally acquired coccidioidomycosis and merits further development for trials in humans.
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Zdanění příjmů obchodních společností a jejich společníků (srovnání právní úpravy v České republice a Slovenské republice) / Taxation of income of business companies and their members (comparison of legal regulation in the Czech Republic and Slovakia)Důjková, Zuzana January 2011 (has links)
75 Resumé v anglickém jazyce a klíčová slova Taxation of income of business companies and their members (comparison of legal regulation in the Czech Republic and the Slovak Republic) My diploma thesis called "Taxation of income of business companies and their members (comparison of legal regulation in the Czech Republic and the Slovak Republic)" focuses mainly on the differences between legal regulation of system of income taxation in the Czech and Slovak Republic. Whereas a business company could be considered solely a legal entity, a member of a business company could be an individual as well. Therefore both areas of income taxation - personal and corporate income tax - are included into the comparison in this diploma thesis. After the introduction the thesis is divided into seven chapters. The first one describes the most important characteristics of particular business companies as they are stipulated in Act No. 513/1991 Coll., Commercial Code, as amended. I have introduced the key features of the most known legal forms of business companies - general partnership, limited partnership, limited liability company and joint stock company. The legal regulation of these types of business companies is similar in the Czech and Slovak Republic. The second chapter deals with legal regulation of both personal and...
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