1,919 research outputs found
disappearance at the SPL, T2K-I and the Neutrino Factory
We study the disappearance channel at T2K-phase I and the SPL and
analyse the achievable reduction of present uncertainties in and
. We analyse the impact of discrete ambiguities in
sign() and sign(). We show how the
disappearance channel at the Neutrino Factory is complementary to the
``golden'' and ``silver'' appearance channels and can be used to reduce the
eightfold-ambiguity problem in ().Comment: 2 pages, 3 epsfig; NUFACT'05, 21-26 June 2005, Frascat
Optimal -beam at the CERN-SPS
A -beam with maximum (for \helio ions) or
(for \neon) could be achieved at the CERN-SPS. We study the sensitivity to
and of such a beam as function of , optimizing
with the baseline constrained to CERN-Frejus (130 km), and also with
simultaneous variation of the baseline. These results are compared to the {\it
standard} scenario previously considered, with lower , and also
with a higher option that requires a more powerful
accelerator. Although higher is better, loss of sensitivity to and is most pronounced for below 100.Comment: 22 page
A Fuzzy k-Nearest Neighbors Classifier to Deal with Imperfect Data
© 2018. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/ This document is the Accepted version of a Published Work that appeared in final form in Soft Computing. To access the final edited and published work see https://doi.org/10.1007/s00500-017-2567-xThe k-nearest neighbors method (kNN) is a nonparametric, instance-based method used for regression and
classification. To classify a new instance, the kNN method computes its k nearest neighbors and generates a class value from them. Usually, this method requires that the information available in the datasets be precise and accurate, except for the existence of missing values. However, data imperfection is inevitable when dealing with real-world scenarios. In this paper, we present the kNNimp classifier, a k-nearest neighbors method to perform classification from datasets with imperfect value. The importance of each neighbor in the output decision is based on relative distance and its degree of imperfection. Furthermore, by using external parameters, the classifier enables us to define the maximum allowed imperfection, and to decide if the final output could be derived solely from the greatest weight class (the best class) or from the best class and a weighted combination of the closest classes to the best one. To test the proposed method, we performed several experiments with both synthetic and realworld datasets with imperfect data. The results, validated through statistical tests, show that the kNNimp classifier is robust when working with imperfect data and maintains a
good performance when compared with other methods in the literature, applied to datasets with or without imperfection
Shooting strategies and effectiveness after offensive rebound and its impact on game result in Euroleague basketball teams
Offensive rebound dominance has been widely shown as a key factor to success in basketball, since provide an extra attack. However, knowledge on how these second-options may results more effective is scarce. Thus, we aimed to discover the influence of shooting after offensive rebound on effectiveness, comparing differences between winners and losers. The sample consisted of 3010 shot attempts from Euroleague-Top-16. Variables pertaining to shooting effectiveness, shooting zone, and game result were registered through systematic observation. Statistical analyses included series of binomial logistic regression analyses. Results showed that shooting effectiveness increases by 67% when shooting after offensive rebound (OR= 1.67; p< 0.01). Additionally, winning teams were more effective after offensive rebound compared to losers (OR= 1.43; p= 0.03). Particularly, winners significantly scored more from the outside than defeated (OR= 3.40; p< 0.01), not finding differences in the inside (p= 0.62). In general, findings point out important advantages of shooting after offensive rebound, showing differences between winners and losers tactics. Thus, it is suggested developing specific tactical behaviours after offensive rebound situations to increase scoring opportunities and winning chances.
Primary and secondary scintillation measurements in a xenon Gas Proportional Scintillation Counter
NEXT is a new experiment to search for neutrinoless double beta decay using a
100 kg radio-pure high-pressure gaseous xenon TPC. The detector requires
excellent energy resolution, which can be achieved in a Xe TPC with
electroluminescence readout. Hamamatsu R8520-06SEL photomultipliers are good
candidates for the scintillation readout. The performance of this
photomultiplier, used as VUV photosensor in a gas proportional scintillation
counter, was investigated. Initial results for the detection of primary and
secondary scintillation produced as a result of the interaction of 5.9 keV
X-rays in gaseous xenon, at room temperature and at pressures up to 3 bar, are
presented. An energy resolution of 8.0% was obtained for secondary
scintillation produced by 5.9 keV X-rays. No significant variation of the
primary scintillation was observed for different pressures (1, 2 and 3 bar) and
for electric fields up to 0.8 V cm-1 torr-1 in the drift region, demonstrating
negligible recombination luminescence. A primary scintillation yield of 81 \pm
7 photons was obtained for 5.9 keV X-rays, corresponding to a mean energy of 72
\pm 6 eV to produce a primary scintillation photon in xenon.Comment: 16 pages, 10 figures, accepted for publication in JINS
Admixture of quasi-Dirac and Majorana neutrinos with tri-bimaximal mixing
We propose a realization of the so-called bimodal/schizophrenic model
proposed recently. We assume S4, the permutation group of four objects as
flavor symmetry giving tri-bimaximal lepton mixing at leading order. In these
models the second massive neutrino state is assumed quasi-Dirac and the
remaining neutrinos are Majorana states. In the case of inverse mass hierarchy,
the lower bound on the neutrinoless double beta decay parameter m_ee is about
two times that of the usual lower bound, within the range of sensitivity of the
next generation of experiments.Comment: 8 pages, minor changes to match version accepted in PL
Revisiting the association of sedentary behavior and physical activity with all-cause mortality using a compositional approach: the Women's Health Study
This research was supported by grants from the National Institutes of Health (CA154647, CA047988, CA182913, HL043851, HL080467, and HL099355). EJS was supported by the Intramural Research Program at the National Institute on Aging. JHM was supported by a Grant from the Spanish Ministry of Education, Culture and Sport (FPU15/02645). CC-S was supported by a grant from the Spanish Ministry of Science and Innovation (FJC2018-037925-I). Additional funding was provided by the University of Granada, Plan Propio de Investigacion 2016, Excellence actions: Units of Excellence; Scientific Excellence Unit on Exercise and Health (UCEES) to FBO. The funders had no role in preparing and conducting this manuscript, in interpreting and deciding to publish the results, or in drafting the manuscript. drafting this manuscript. Open Access funding provided by the National Institutes of Health (NIH).Background: While physical activity has consistently been associated with decreased mortality rates, it remains
unknown if there is a single “ideal” combination of time in physical activities of different intensities and sedentary
behavior (SB) associated with the lowest rate. This study examined the associations of combinations of time in
moderate-to-vigorous intensity (MVPA), higher-light intensity (HLPA), lower-light intensity activities (LLPA), and SB
with mortality rates in older women.
Methods: This prospective cohort study included 16,676 older women from throughout the United States enrolled
in the Women’s Health Study. Women wore accelerometers on their hip from 2011 to 2015 and were followed
through 2017 (mean (SD) of 4.3 (1.1) years). Deaths were confirmed with medical records, death certificates, or the
National Death Index. Compositional Cox regression models were used.
Results: The mean (SD) age was 72 (5.7) years at accelerometer wear; 503 women died. Compared to the least
active women (mean, 3 min/day MVPA, 27 min/day HLPA, 162 min/day LLPA, and 701 min/day SB): compositional
models showed an inverse L-shaped dose-response association of MVPA replacing other behaviors with mortality
rates mortality rates (P = .02); SB relative to LLPA, HLPA, and MVPA was directly associated with mortality rates in a
curvilinear dose-response manner (P < .001); replacing 10 min of SB for MVPA (HR (95% CI) = .86 (.73–.98)) or for
HLPA (HR (95% CI.94 (.88–1.00)) associated with 14 and 6% lower mortality rates, respectively; a 47% risk reduction
(HR [95% CI] = .53 [.42–.64]) was observed among women meeting physical activity guidelines (mean, 36 min/day
MVPA, 79 min/day HLPA, 227 min/day LLPA and 549 min/day SB); and similar mortality rate reductions of 43% (HR
(95% CI) = .57 (.41–.73)) were observed with increases in HLPA and LLPA without increasing MVPA, e.g., reallocating
SB to 90 min/day of HLPA plus 120 min/day of LLPA.
Conclusions: There was no “ideal” combination of physical activities of different intensities and SB associated with
the lowest mortality rates. Of particular relevance to older women, replacing SB with light intensity activity was
associated with lower mortality rates, and “mixing and matching” times in different intensities yielded equivalent
mortality risk reductions.United States Department of Health & Human Services
National Institutes of Health (NIH) - USA CA154647
CA047988
CA182913
HL043851
HL080467
HL099355Intramural Research Program at the National Institute on AgingSpanish Ministry of Education, Culture and Sport FPU15/02645Spanish Government FJC2018-037925-IUniversity of Granada, Plan Propio de Investigacion 2016, Excellence actions: Units of ExcellenceScientific Excellence Unit on Exercise and Health (UCEES)United States Department of Health & Human ServicesNational Institutes of Health (NIH) - US
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