15,470,178 research outputs found

    Monte-Carlo generator for e+e- annihilation into lepton and hadron pairs with precise radiative corrections

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    Recently, various cross sections of e+e- annihilation into hadrons were accurately measured in the energy range from 0.37 to 1.39 GeV with the CMD-2 detector at the VEPP-2M collider. In the pi+pi- channel a systematic uncertainty of 0.6% has been achieved. A Monte-Carlo Generator Photon Jets (MCGPJ) was developed to simulate events of the Bhabha scattering as well as production of two charged pions, kaons and muons. Based on the formalism of Structure Functions, the leading logarithmic contributions related to the emission of photon jets in the collinear region are incorporated into the MC generator. Radiative corrections (RC) in the first order of alpha are accounted for exactly. The theoretical precision of the cross sections with RC is estimated to be better than 0.2%. Numerous tests of the program as well as comparison with other MC generators and CMD-2 experimental data are presented.Comment: LaTeX, 23 pages with 18 figure

    Electroweak corrections to top-quark pair production in quark--antiquark annihilation

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    Top-quark physics plays an important role at hadron colliders such as the Tevatron at Fermilab or the LHC at CERN. Given the planned precision at these colliders, precise theoretical predictions are required. In this paper we present the complete electroweak corrections to QCD-induced top-quark pair production in quark--antiquark annihilation. In particular we provide compact analytic expressions for the differential partonic cross section, which will be useful for further theoretical investigations

    Monte Carlo simulation for radiative kaon decays

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    For high precision measurements of K decays, the presence of radiated photons cannot be neglected. The Monte Carlo simulations must include the radiative corrections in order to compute the correct event counting and efficiency calculations. In this paper we briefly describe a method for simulating such decays.Comment: 11 pages, 1 figur

    Dinnerfor1

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    'Dinnerfor1' is a 4 monitor video and sound installation which was first exhibited at the British Council Berlin as part of Transmediale Berlin in February 2005. DinnerFor1 is a woman talking to you. Her questions (isolated from the replies using fictional and factual texts) are often universal, so that a viewer is directly engaged: each set of questions is taken from a different source, connoting different strata of society and areas of (public) life. These range from the sensationalist interview into Princess Diana’s private life, through the enquiry into the justification of the Second Gulf War with questions asked of Dr Kelly, the cross examination of Oscar Wilde at his trials to subversive snippets from Wilde’s Importance of Being Ernest. The project consists of four looped videos, entitled the play, the committee, the trial and the interview. DinnerFor1 examines and highlights national identities and their stereotypes in a medium accessible internationally and reflects on the possibilities of communication with virtual acquaintances through the computer and television screen. It was inspired by the cult German television production from 1963, based on a British vaudeville sketch from the 1920s. Dinner for One holds the record for repeated television screenings in Germany. This sketch, starring Freddie Frinton and May Warden, has been shown every New Year’s Eve since 1972. Over the decades it has impressed a vision of the British upon viewers in Germany and other European countries. And yet this TV-production from 1963 is unknown within the UK. The setting of the piece as a permanent online installation and the venues and cities chosen for exhibition (British Council Berlin, Goethe Institute London and Goethe Institute Dublin) reflect and test the complexity of inter-national cultural relations and exchange. Dinnerfor1 was purchased by the Verbund Collection Vienna, in 2006

    Digital age: challenges for libraries

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    Information technology and globalization are the two most influential forces of the modern times. IT has given new meanings to the transmission, dissemination and storage of information; whereas globalisation is reducing the importance of geographical boundaries. Libraries as an important social institution have been affected by these changes. Information retrieval, information storage and information transmission are the core competencies of the libraries. Digital age characterized by efficient graphic user interface, digital imaging, efficient transfer and storage of texts, is presenting important challenges for the libraries. Information privacy, copyrights, and information security are some of the challenging issues faced by the libraries in digital age. This paper is an attempt to present as well as to discuss the implications of these issues so that strategies can be devised to address them effectively and efficiently

    CORRELATION OF FINE NEEDLE ASPIRATION AND FINAL HISTOPATHOLOGY IN THYROID DISEASE: A SERIES OF 702 PATIENTS MANAGED IN AN ENDOCRINE SURGICAL UNIT

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    Thyroid nodules are a common clinical entity found among the adult general population. With increasing use of imaging investigations like ultrasonography, there has been a significant rise in the detection of non-palpable thyroid nodules that require further evaluation and management. The routine use of FNAC has reduced the number of unnecessary surgical procedures for thyroid nodules. Taking a decision as to whether to operate on a thyroid nodule is dependent on accurate FNAC testing. This study describes the experience with FNAC in a consecutive series of patients with thyroid nodules who underwent thyroidectomy at a tertiary care hospital in the department of endocrine surgery. 

    Ubiquitous computing and knowledge management

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    MOBIlearn is a large European research project to develop a mobile learning system to facilitate formal, non formal and informal learning. The project has two primary objectives: • Develop a methodology for creating mobile learning scenarios and producing learning objects to implement them. • Develop the technology to deliver the learning objects to users via mobile computing devices. This paper will concentrate the MOBIlearn health care domain. One of this applications main objectives is managing and sharing of tacit knowledge. Using the system participants discuss case studies and alternative approaches to specific problems are evaluated and documented. This is then used and extended in future case studies. In a mobile learning environment, individual health workers can use the system to either advanced their skills, or in a ‘live’ incident, use it for reference and indeed call for backup.</p

    Masthead

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