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Search Results: 1 - 10 of 1606 matches for " Abe Seiden "
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The Role of CP violation in D0 anti-D0 Mixing
G. Blaylock,Abe Seiden,Y. Nir
Physics , 1995, DOI: 10.1016/0370-2693(95)00787-L
Abstract: In current searches for D0 anti-D0 mixing, the time evolution of ``wrong-sign'' decays is used to distinguish between a potential mixing signal and the dominant background from doubly-Cabibbo-suppressed decays. A term proportional to $\Delta Mt$ in the expression for the time evolution is often neglected in theoretical discussions and experimental analyses of these processes. We emphasize that, in general, this term does not vanish even in the case of CP invariance. Furthermore, CP invariance is likely to be violated if the rate of D0 anti-D0 mixing is close to the experimental bound. The consequence of either of these two facts is that the strongest existing measured bound is not applicable for constraining New Physics.
ATLAS Upgrade Instrumentation in the US
Gustaaf Brooijmans,Hal Evans,Abe Seiden
Physics , 2013,
Abstract: Planned upgrades of the LHC over the next decade should allow the machine to operate at a center of mass energy of 14 TeV with instantaneous luminosities in the range 5--7e34 cm^-2 s^-1. With these parameters, ATLAS could collect 3,000 fb^-1 of data in approximately 10 years. However, the conditions under which this data would be acquired are much harsher than those currently encountered at the LHC. For example, the number of proton-proton interactions per bunch crossing will rise from the level of 20--30 per 50 ns crossing observed in 2012 to 140--200 every 25 ns. In order to deepen our understanding of the newly discovered Higgs boson and to extend our searches for physics beyond that new particle, the ATLAS detector, trigger, and readout will have to undergo significant upgrades. In this whitepaper we describe R&D necessary for ATLAS to continue to run effectively at the highest luminosities foreseen from the LHC. Emphasis is placed on those R&D efforts in which US institutions are playing a leading role.
D0-D0 Mixing at BaBar
A. Seiden
Physics , 2007,
Abstract: The BaBar and Belle collaborations have recently found evidence for mixing within the D meson system. We present some of the mixing search techniques used by BaBar and their status as of the beginning of the summer 2007. These have culminated in a measurement in the K decay final state of the D that is inconsistent with the no-mixing hypothesis with a significance of 3.9 standard deviations.
Number-theoretic expressions obtained through analogy between prime factorization and optical interferometry
Gabriel Seiden
Physics , 2011, DOI: 10.1103/PhysRevA.85.043842
Abstract: Prime factorization is an outstanding problem in arithmetic, with important consequences in a variety of fields, most notably cryptography. Here we employ the intriguing analogy between prime factorization and optical interferometry in order to obtain, for the first time, analytic expressions for closely related functions, including the number of distinct prime factors.
My e-journal – exploring the usefulness of personalized access to scholarly articles and services
Jette Hyldegaard,Piet Seiden
Information Research: an international electronic journal , 2004,
Abstract: The paper presents the results of a user evaluation study exploring the usefulness of personalized access to scholarly journals and services with regard to the information behaviour of scientists. The aim was to investigate what factors would be critical to personalization, what personalization features would be relevant and to what extent profile and behaviour based personalization would be acceptable. Three providers of personalized access to scholarly journals and services formed the basis of the study. The user group was fourteen doctoral students. Personalization was found to be associated with expectations of increased efficiency compared to traditional searching, emphasizing the need for functionality oriented features such as search alerts. Profile based personalization was to some extent positively associated with reduction of information overload. Various quality indicators were found to affect the perceived reliability of a service, making trust a critical theme when establishing a personalized user experience. The study suggests implications for the digital library when designing for a personalized information environment.
The Tongue as an Excitable Medium
Gabriel Seiden,Sofia Curland
Physics , 2014, DOI: 10.1088/1367-2630/17/3/033049
Abstract: Geographic tongue (GT) is a benign condition affecting approximately 2% of the population, whereby the papillae covering the upper part of the tongue are lost due to a slowly expanding inflammation. The resultant dynamical appearance of the tongue has striking similarities with well known phenomena observed in excitable media, such as forest fires, cardiac dynamics and chemically-driven reaction-diffusion systems. Here we explore the dynamics associated with GT from a dynamical systems perspective, utilizing cellular automata simulations. We emphasize similarities with other excitable systems as well as unique features observed in GT. Our results shed light on the evolution of the inflammation and contribute to the classification of the severity of the condition, based on the characteristic patterns observed in GT patients.
Online Companion Caching
Manor Mendel,Steven S. Seiden
Computer Science , 2004, DOI: 10.1016/j.tcs.2004.05.015
Abstract: This paper is concerned with online caching algorithms for the (n,k)-companion cache, defined by Brehob et. al. In this model the cache is composed of two components: a k-way set-associative cache and a companion fully-associative cache of size n. We show that the deterministic competitive ratio for this problem is (n+1)(k+1)-1, and the randomized competitive ratio is O(\log n \log k) and \Omega(\log n +\log k).
Non-motor signs and symptoms in Parkinson’s disease  [PDF]
Kazuo Abe
Health (Health) , 2012, DOI: 10.4236/health.2012.431171
Abstract: Motor symptoms are cardinal clinical features of Parkinson’s disease (PD). Progress in drug therapy and rehabilitation has been presenting beneficial effect for motor symptoms. However, non-motor symptoms and signs in PD have been accumulated growing attentions and its amelioration may also give beneficial effect for PD patients’ and their care givers’ quality of life. In this mini-review, I overviewed non-motor symptoms and signs in PD.
A Geometric Approach to Temptation and Self-Control  [PDF]
Koji Abe
Theoretical Economics Letters (TEL) , 2016, DOI: 10.4236/tel.2016.63060
Abstract: By making use of a geometry of preferences, Abe (2012) proves the Gul and Pesendorfer’s utility representation theorem about temptation without self-control. This companion paper provides a similar proof for the Gul and Pesendorfer's utility representation theorem about temptation and costly self-control. As a result, the both theorems are proved in the unified way.
Silicon Deposition in Leaf Trichomes of Cucurbitaceae Horticultural Plants: A Short Report  [PDF]
Jun Abe
American Journal of Plant Sciences (AJPS) , 2019, DOI: 10.4236/ajps.2019.103034
Abstract: Silicon deposition in leaf trichome of six horticultural Cucurbitaceae species, cucumber (Cucumis sativus), pumpkin (Cucurbita maxima), melon (Cucumis melo), watermelon (Citrullus lanatus), sponge gourd (Luffa cylindrica) and bottle gourd (Lagenaria siceraria var. hispida) was observed by an X-ray microanalyzer coupled with an environmental scanning electron microscope. The elements that presented in the surface of three or four leaves of the individual species were detected and mapped by the X-ray microanalyzer. In leaves of cucumber, pumpkin, and melon, high accumulation of silicon was detected in cells surrounding the bases of the trichome hair and the hair itself deposited calcium. On the other hand, in sponge gourd and bottle gourd, high accumulation of silicon was detected only in the hair. In watermelon leaves, silicon deposited both in the hair and in cells surrounding the bases of the hair. Thus, horticultural Cucurbitaceae plants have interspecific variation in the pattern of silicon deposition in leaf trichomes.
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