361 research outputs found

    06141 Abstracts Collection -- Dynamically Reconfigurable Architectures

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    From 02.04.06 to 07.04.06, the Dagstuhl Seminar 06141 ``Dynamically Reconfigurable Architectures\u27\u27 was held in the International Conference and Research Center (IBFI), Schloss Dagstuhl. During the seminar, several participants presented their current research, and ongoing work and open problems were discussed. Abstracts of the presentations given during the seminar as well as abstracts of seminar results and ideas are put together in this paper. The first section describes the seminar topics and goals in general. Links to extended abstracts or full papers are provided, if available

    10281 Abstracts Collection -- Dynamically Reconfigurable Architectures

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    From 11.07.10 to 16.07.10, Dagstuhl Seminar 10281 ``Dynamically Reconfigurable Architectures \u27\u27 was held in Schloss Dagstuhl~--~Leibniz Center for Informatics. During the seminar, several participants presented their current research, and ongoing work and open problems were discussed. Abstracts of the presentations given during the seminar as well as abstracts of seminar results and ideas are put together in this paper. The first section describes the seminar topics and goals in general. Links to extended abstracts or full papers are provided, if available

    ANALYZING THE STRUGGLES OF STUDENTS AND GRADUATES OF TECHNICAL AND VOCATIONAL EDUCATION IN TANZANIA

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    Education aims forever to provide a better life, and still, the aim is the same. However, the meaning of better has changed with time, particularly at the individual, national, and international levels. The changes for the betterment are influenced by many factors, including the country’s educational systems. This study finds a better situation of learning and easy job acquisition by exploring the struggles encountered by students and graduates from Technical and Vocational Education and Training (TVET) colleges, institutions, and centers in Tanzania and highlighting the possible way forward. The Findings on students’ struggles in learning and struggles in the labor market (of getting jobs) after graduating from TVET colleges or centers of Tanzania are caused explicitly by the existing TVET system. TVET teachers are not well equipped with technological, management, and personal (TMP) skills, pedagogical skills, content knowledge, lack of commitments, poor motivations, and unrealistic technical and vocational policies. Students, parents and employers’ perceptions also contribute to students’ struggle in learning and job attainments. The study mainly answered the questions like why students struggle in learning and why they struggle in the labor market to get jobs. Several themes (thematic analysis) were drawn from the study and addressed/ attempted to answer the raised questions with references to the existing evidence of the Tanzanian context and Africa. The study is purely a qualitative. Lastly, the study strongly advises revamping the existing pedagogy in TVET and TVET policy due to their weaknesses in the educational system. Though, the government should take into consideration all issues noticed.  Article visualizations

    Discrete Ambiguities in the Measurement of the Weak Phase Gamma

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    Several time-independent methods have been devised for measuring the phase gamma of the Cabibbo-Kobayashi-Maskawa unitarity triangle. It is shown that such measurements generally suffer from discrete ambiguity which is at least 8-fold, not 4-fold as commonly stated. This has serious experimental implications, which are explored in methods involving B->DK decays. The measurement sensitivity and new physics discovery potential are estimated using a full Monte Carlo detector simulation with realistic background estimates.Comment: 15 pages, 2 figures, fixed typ

    Measuring Îł\gamma in B±→K±(KK∗)DB^\pm \to K^\pm (K K^*)_D decays

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    We develop a method to measure the CKM angle Îł\gamma without hadronic uncertainties from the analysis of B±→K±D0B^\pm \to K^\pm D^0 and K^\pm \D0bar followed by singly Cabibbo-suppressed DD decays to non CP-eigenstates, such as K±K∗∓K^\pm K^{*\mp}. This method utilizes the interference between b→cuˉsb\to c\bar u s and b→ucˉsb\to u\bar c s decays, and we point out several attractive features of it. All the modes that need to be measured for this method are accessible in the present data.Comment: 8 page

    Impact of D0-D0bar mixing on the experimental determination of gamma

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    Several methods have been devised to measure the weak phase gamma using decays of the type B+- --> D K+-, where it is assumed that there is no mixing in the D0-D0bar system. However, when using these methods to uncover new physics, one must entertain the real possibility that the measurements are affected by new physics effects in the D0-D0bar system. We show that even values of x_D and/or y_D around 10^{-2} can have a significant impact in the measurement of sin^2{gamma}. We discuss the errors incurred in neglecting this effect, how the effect can be checked, and how to include it in the analysis.Comment: 18 pages, Latex with epsfig, 8 figure

    Cabibbo-suppressed non-leptonic B- and D-decays involving tensor mesons

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    The Cabibbo-suppressed non-leptonic decays of B (and D) mesons to final states involving tensor mesons are computed using the non-relativistic quark model of Isgur-Scora-Grinstein-Wise with the factorization hypothesis. We find that some of these B decay modes, as B --> (K^*, D^*)D^*_2, can have branching ratios as large as 6 x 10^{-5} which seems to be at the reach of future B factories.Comment: Latex, 11 pages, to appear in Phys. Rev.

    Determining Îł\gamma using B±→DK±B^\pm \to D K^\pm with multibody D decays

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    We propose a method for determining Îł\gamma using B±→DK±B^\pm\to D K^\pm decays followed by a multibody DD decay, such as D→KSπ−π+D \to K_S \pi^-\pi^+, D→KSK−K+D \to K_S K^-K^+ and D→KSπ−π+π0D \to K_S \pi^-\pi^+\pi^0. The main advantages of the method is that it uses only Cabibbo allowed DD decays, and that large strong phases are expected due to the presence of resonances. Since no knowledge about the resonance structure is needed, Îł\gamma can be extracted without any hadronic uncertainty.Comment: 17 pages, 1 figur

    Weak decays of 4He-Lambda

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    We measured the lifetime and the mesonic and non-mesonic decay rates of the 4He-Lambda hypernucleus. The hypernuclei were created using a 750 MeV/c momentum K- beam on a liquid 4He target by the reaction 4He(K-,pi-)4He-Lambda. The 4He-Lambda lifetime was directly measured using protons from Lambda p -> n p non-mesonic decay (also referred to as proton-stimulated decay) and was found to have a value of tau = 245 +/- 24 ps. The mesonic decay rates were determined from the observed numbers of pi-'s and pi0's as Gamma_pi-/Gamma_tot = 0.270 +/- 0.024 and Gamma_pi0/Gamma_tot = 0.564 +/- 0.036, respectively, and the values of the proton- and neutron-stimulated decay rates were extracted as Gamma_p/Gamma_tot = 0.169 +/- 0.019 and Gamma_n/Gamma_tot <= 0.032 (95% CL), respectively. The effects of final-state interactions and possible 3-body Lambda N N decay contributions were studied in the context of a simple model of nucleon-stimulated decay. Nucleon-nucleon coincidence events were observed and were used in the determination of the non-mesonic branching fractions. The implications of the results of this analysis were considered for the empirical Delta I = 1/2 rule and the decay rates of the 4H-Lambda hypernucleus.Comment: 15 pages, 11 figures, published in PRC, revised content to match published versio
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