42,135 research outputs found

    “Natural Born” Disputes in the 2016 Presidential Election

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    The 2016 presidential election brought forth new disputes concerning the definition of “natural born Citizen.” The most significant challenges surrounded the eligibility of Senator Ted Cruz, born in Canada to a Cuban father and an American mother. Unlike challenges to President Barack Obama’s eligibility, which largely turned on conspiratorial facts, challenges to Cruz’s eligibility turned principally on the law and garnered more serious attention concerning a somewhat cryptic constitutional clause. Understandably, much attention focused on the definition of “natural born citizen” and whether candidates like Cruz qualified. Administrative challenges and litigation in court revealed deficiencies in the procedures for handling such disputes. This paper exhaustively examines these challenges, identifies three significant complications arising out of these disputes, and urges a solution for future presidential elections

    Prospects for Higgs Boson Searches in the Channel WH -> lnbb

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    We present a method how to detect the WH -> lnbb in the high luminosity LHC environment with the CMS detector. This study is performed with fast detector response simulation including high luminosity event pile up. The main aspects of reconstruction are pile up jet rejection, identification of b-jets and improvement of Higgs mass resolution. The detection potential in the SM for m(H) < 130 GeV and in the MSSM is only encouraging for high integrated luminosity. Nevertheless it is possible to extract important Higgs parameters which are useful to elucidate the nature of the Higgs sector. In combination with other channels, this channel provides valuable information on Higgs boson couplings.Comment: 8 pages, 8 figure

    Searching for Higgs Bosons in Association with Top Quark Pairs in the H -> bb Decay Mode

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    Search for the Higgs Boson is one of the prime goals of the LHC. Higgs bosons lighter than 130 GeV decay mainly to a b-quark pair. While the detection of a directly produced Higgs boson in the bb channel is impossible because of the huge QCD background, the channel ttH -> lnqqbbbb is very promising in the Standard Model and the MSSM. We discuss an event reconstruction and selection method based on likelihood functions. The CMS detector response is performed with parametrisations obtained from detailed simulations. Various physics and detector performance scenarios are investigated and the results are presented. It turns out that excellent b-tagging performance and good mass resolution are essential for this channel.Comment: 10 pages, 6 figure

    What pops out in positional priming of pop-out: insights from event-related EEG lateralizations

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    It is well established that, in visual pop-out search, reaction time (RT) performance is influenced by cross-trial repetitions versus changes of target-defining attributes. One instance of this is referred to as “positional priming of pop-out” (pPoP; Maljkovic and Nakayama, 1996). In positional PoP paradigms, the processing of the current target is examined depending on whether it occurs at the previous target or a previous distractor location, relative to a previously empty location (“neutral” baseline), permitting target facilitation and distractor inhibition to be dissociated. The present study combined RT measures with specific sensory- and motor-driven event-related lateralizations to track the time course of four distinct processing levels as a function of the target’s position across consecutive trials. The results showed that, relative to targets at previous target and “neutral” locations, the appearance of a target at a previous distractor location was associated with a delayed build-up of the posterior contralateral negativity wave, indicating that distractor positions are suppressed at early stages of visual processing. By contrast, presentation of a target at a previous target, relative to “neutral” and distractor locations, modulated the elicitation of the subsequent stimulus-locked lateralized readiness potential wave, indicating that post-selective response selection is facilitated if the target occurred at the same position as on the previous trial. Overall, the results of present study provide electrophysiological evidence for the idea that target location priming (RT benefits) does not originate from an enhanced coding of target saliency at repeated (target) locations; instead, they arise (near-) exclusively from processing levels subsequent to focal-attentional target selection

    What is the temperature in heavy ion collisions?

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    We consider the Tsallis distribution as the source of the apparent slope of one-particle spectra in heavy-ion collisions and investigate the equation of state of this special quark matter in the framework of non-extensive thermodynamics.Comment: Talk given by T.S.Biro at RHIC School 2003, Dec.8-11, 2003, Budapest, Hungar

    A Mathematical Model for Estimating Biological Damage Caused by Radiation

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    We propose a mathematical model for estimating biological damage caused by low-dose irradiation. We understand that the Linear Non Threshold (LNT) hypothesis is realized only in the case of no recovery effects. In order to treat the realistic living objects, our model takes into account various types of recovery as well as proliferation mechanism, which may change the resultant damage, especially for the case of lower dose rate irradiation. It turns out that the lower the radiation dose rate, the safer the irradiated system of living object (which is called symbolically "tissue" hereafter) can have chances to survive, which can reproduce the so-called dose and dose-rate effectiveness factor (DDREF).Comment: 22 pages, 6 Figs, accepted in Journal of the Physical Society of Japa

    Right Aortic Arch and Associated Anomalies

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    Two cases of right-sided aortic arch are presented. The topographical changes in the surrounding structures are described with special reference to the recurrent laryngeal nerve, the ligamentum arteriosum and the thoracic duct. The anatomy is compared with the right-sided aortic arch c;s seen in a case of complete situs inversus.S. Afr. Med. J., 48, 1059 (1974

    Partial agenesis of tile diaphragm associated with partial agenesis of the pericardium in an adult bantu male

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    Tetralogy of Fallot with Pulmonary Obstruction at the Level of the Conus Inlet

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    A case of Fallot's tetralogy is described in a Black male who died of acute cardiac failure at the age of 17 years. The conus arteriosus was practically a separate chamber communicating with the right ventricle through a very small ostium. The embryology of the truncus arteriosus the bulbus cordis is discussed in the light of the anomalies described here. The question of maintenance of the pulmonary circulation in the absence of an open ductus arteriosus is discussed.S. Afr. Med. J. 48, 677 (1974
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