Search results for "Tipa"

Direct measurement of the mass difference between top and antitop quarks

2009

We present a direct measurement of the mass difference between top and antitop quarks (dm) in lepton+jets top-antitop final states using the "matrix element" method. The purity of the lepton+jets sample is enhanced for top-antitop events by identifying at least one of the jet as originating from a b quark. The analyzed data correspond to 3.6 fb-1 of proton-antiproton collisions at 1.96 TeV acquired by D0 in Run II of the Fermilab Tevatron Collider. The combination of the e+jets and mu+jets channels yields dm = 0.8 +/- 1.8 (stat) +/- 0.5 (syst) GeV, which is in agreement with the standard model expectation of no mass difference.

Identified particles in quark and gluon jets

1997

A sample of about 1.4 million hadronic Z decays, selected among the data recorded by the DELPHI detector at LEP during 1994, was used to measure for the first time the momentum spectra of K+, K-0, p, Lambda and their antiparticles in gluon and quark jets. As observed for inclusive charged particles, the production spectra of identified particles were found to be softer in gluon jets than in quark jets, with a higher total multiplicity. (C) 1997 Published by Elsevier Science B.V.

Search for a Fourth Generationt′Quark inpp¯Collisions ats=1.96  TeV

2011

We present a search for pair production of a fourth generation t' quark and its antiparticle, followed by their decays to a W boson and a jet, based on an integrated luminosity of 5.3/fb of proton-antiproton collisions at sqrt{s}=1.96 TeV collected by the D0 Collaboration at the Fermilab Tevatron Collider. We set upper limits on the t't'bar production cross section that exclude at the 95% C.L. a t' quark that decays exclusively to W+jet with a mass below 285 GeV. We observe a small excess in the muon+jets channel which reduces the mass range excluded compared to the expected limit of 320 GeV in the absence of a signal.

Cross Section and Parity-Violating Spin Asymmetries ofW±Boson Production in Polarizedp+pCollisions ats=500  GeV

2011

Large parity-violating longitudinal single-spin asymmetries A(L)(e+) = 0.86(-0.14)(+0.30) and Ae(L)(e-) = 0.88(-0.71)(+0.12) are observed for inclusive high transverse momentum electrons and positrons in polarized p + p collisions at a center-of-mass energy of root s = 500 GeV with the PHENIX detector at RHIC. These e(+/-) come mainly from the decay of W-+/- and Z(0) bosons, and their asymmetries directly demonstrate parity violation in the couplings of the W-+/- to the light quarks. The observed electron and positron yields were used to estimate W-+/- boson production cross sections for the e(+/-) channels of sigma(pp -> W+X) X BR(W+ -> e(+) nu(e)) = 144.1 +/- 21.2(stat)(-10.3)(+3.4)(syst)…

Early DEtection of wEaring off in Parkinson disease: The DEEP study

2014

Assessing the frequency of Wearing-Off (WO) in Parkinson's disease (PD) patients, and its impact on Quality of Life (QoL). METHODS: Consecutive ambulatory patients, who were on dopaminergic treatment for ≥ 1 year, were included in this multicentre, observational cross-sectional study. In a single visit, WO was diagnosed based on neurologist assessment as well as using the validated Italian version of a patient self-rated 19-question Wearing-Off Questionnaire (WOQ-19); WO was defined for scores ≥ 2. QoL was evaluated by the 8-item Parkinson's Disease Questionnaire (PDQ-8). RESULTS: 617 subjects were included, with a mean anti-Parkinson treatment duration of 6.6 ± 4.6 years, 87.2% were on lev…

Multiparametric-MRI evaluation of cervical nodes in patients with head and neck squamous cell carcinoma (HNSCC)

RSS-eye: Human-assisted Indoor Localization without Radio Maps

2015

The pervasive diffusion of smartphones is boosting indoor positioning solutions and location-based services. We propose a novel methodology to perform indoor positioning of mobile users by the estimation of angles of arrival from access points whose locations are known. Angles of arrival are estimated by correlating WiFi RSSI measurements with data coming from a digital compass, which is provided by most current handsets. Our system has minimal requirements in terms of infrastructure and mobile hardware. The system neither needs calibration, nor radio maps but requires the user to perform a gesture when an estimation is needed. The resulting on-demand localization has advantages in terms of…

Klasifikācijas metožu lietojums vilciena vagonu tipa noteikšanai no attēla

2015

Datorredzes un tēlu atpazīšanas jomu attīstība paver iespēju veikt dažādu ikdienā nozīmīgu procesu automatizāciju. Lai aizvietotu cilvēka veiktu vilcienu vagonu vizuālo pārbaudi un automātiski konstatētu dažāda veida novirzes no normas, ir nepieciešams veikt vagonu klasifikāciju pēc tipa. Darbā tiek aplūkotas dažas attēlu apstrādes tehnikas, ar kuru palīdzību tiek iegūtas vagona attēla krāsas, struktūras un izmēra iezīmes. Tālāk tiek apskatītas un izvērtētas vairākas klasifikācijas metodes un divas piemērotākās no tām, atbalsta vektoru metode jeb SVM un nozīmīgo vektoru metode jeb RVM, tiek aprakstītas sīkāk. Rezultātā tiek izstrādāts sistēmas prototips, kas var atšķirt dažāda tipa vagonus …

Book review of Shield, Andrew DJ (2019) Immigrants on Grindr. Race, Sexuality and Belonging Online. Cham: Palgrave Macmillan. 245 pp.

2022

Links between adverse childhood experiences, psychopathological symptoms and recidivism risk in juvenile delinquents

2020

Research in the field of developmental psycho-criminology shows that conduct disorders and deviant behaviours are frequently associated with traumatic and adverse developmental experiences. Personality traits and psychopathological symptoms also increase the risk of criminality. However, the role of psychopathological symptoms in the relationship between adverse childhood experiences and offending has rarely been researched. The present study was designed to throw further light on these issues by analysing risk factors in a group of adolescents and young adults in a juvenile detention centre in southern Italy. Results support the idea that the accumulation of risk factors is a major factor…