Silicon vertex tracker for RHIC PHENIX experiment Taketani, A.; Akiba, Y.; Apdula, N. ...
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment,
11/2010, Volume:
623, Issue:
1
Journal Article
Peer reviewed
The PHENIX experiment at Relativistic Heavy Ion Collider will be equipped with Silicon Vertex tracker to enhance its physics capability. There are four layers of silicon sensor to reconstruct charged ...tracks with 50μm resolution of decay length measurement. The VTX surrounds the collision point. The inner two layers and the outer two layers are composed of 30 pixel ladders and 44 stripixel ladders, respectively. We have been developing these detectors and done a performance test with 120GeV proton beam.
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GEOZS, IJS, IMTLJ, KILJ, KISLJ, NUK, OILJ, PNG, SAZU, SBCE, SBJE, UL, UM, UPCLJ, UPUK
Introduction: Despite the clear relevance of the Student-teacher relationship, studies have rarely encompassed subjects with special education needs. Our study focused on the differences perceived by ...teachers in their relationships with these students. Method: We described the results obtained with different groups of children with special education needs: ASDs (N = 14), Down Syndrome (N = 18), Learning Disorders (N = 38) and children with hyperactive behaviors and attention deficits (N = 56). Results from each group were then compared with those obtained by children with typical development (N = 254). The teachers were asked to fill out the "Student-Teacher Relationship Scale" (STRS). Results: Our study found that the social bonds formed by children with special needs differ for at least one relational aspect from those formed by children taken from the Control Group, the sole exception being children with Down's Syndrome. Discussion and Conclusion: The Closeness dimension was hampered in the case of children who suffered from ASDs, attention deficits or hyperactive behaviors. Furthermore, the relationships with the latter group of children were characterized by a higher level of conflict and dependency. Children with Learning Disorders also suffered an increase in the dependency dimension.
The silicon pixel detector will be installed in summer 2009 as part of the RHIC-PHENIX silicon vertex tracker (VTX) upgrade at the Brookhaven National Laboratory. The VTX consists of a silicon pixel ...detector and stripixel detector. For the construction of the silicon pixel detector, we have developed a fine pitch and low material readout bus as the backbone parts of the VTX. In this article, we report the development of the readout bus.
Background: Numerous studies on educational and developmental psychology have concluded that students’ affective relationships with their teachers are crucial for their academic motivation and ...commitment to school. Frequently the relationship is evaluated from the teacher’s point of view, but the importance of considering the children’s perspective has been highlighted by many authors. Methods: In this study, we present data to examine the factorial structure of the Young Children’s Appraisals of Teacher Support (Y-CATS), a measure designed to explore children’s perceptions of their relationships with teachers on a sample of 503 children ranging in age from 5 to 10 years, and 163 teachers. Results: This study provides implications for construct validity research and substantive research using Y-CATS, given that Y-CATS is used extensively in intervention and research in early childhood education. Conclusion: On the basis of the results obtained, the questionnaire seems to be an adequate instrument to study student-teacher relationships, both as a monitoring scale of a given relationship and as a way to help teachers achieve more awareness of their educational skills.
A detailed investigation of hadronic interactions is performed using π−-mesons with energies in the range 2–10 GeV incident on a high granularity silicon–tungsten electromagnetic calorimeter. The ...data were recorded at FNAL in 2008. The region in which the π−-mesons interact with the detector material and the produced secondary particles are characterised using a novel track-finding algorithm that reconstructs tracks within hadronic showers in a calorimeter in the absence of a magnetic field. The principle of carrying out detector monitoring and calibration using secondary tracks is also demonstrated.
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GEOZS, IJS, IMTLJ, KILJ, KISLJ, NLZOH, NUK, OILJ, PNG, SAZU, SBCE, SBJE, UILJ, UL, UM, UPCLJ, UPUK, ZAGLJ, ZRSKP
There is no pharmacological treatment of trichotillomania that has consistently demonstrated efficacy, although good results have been obtained with antidepressants and other drugs such as atypical ...antipsychotics, bupropion, lithium, and topiramate. The anticonvulsant oxcarbazepine has also been used as mood stabilizer and has been tested for treating binge eating, but there is no report on oxcarbazepine in trichotillomania.
We report the case of an obese 43-year-old woman with a diagnosis of trichotillomania in comorbidity with binge eating disorder who was treated with a flexible dose of the anticonvulsant oxcarbazepine.
We administered oxcarbazepine at a dosage of 1200 mg/d, and this subject improved both in hair pulling and in eating behaviors with no relapse after 9 months.
Further studies with a wide sample of patients are needed to prove the efficacy of oxcarbazepine and the long-term maintenance of these benefits. Relationships of trichotillomania with bipolar spectrum should also be investigated.
Abstract
The SuperFGD detector will be a novel and important upgrade to the ND280 near detector for both the T2K and Hyper-Kamiokande projects. The main goal of the ND280 upgrade is to reduce ...systematic uncertainties associated with neutrino flux and cross-section modeling for future studies of neutrino oscillations using the T2K and Hyper-Kamiokande experiments. The upgraded ND280 detector will be able to perform a full exclusive reconstruction of the final state from neutrino-nucleus interactions, including measurements of low momentum protons, pions and for the first time, event-by event measurements of neutron kinematics. Precisely understanding the time resolution is critical for the neutron energy measurements and hence an important factor in reducing the systematic uncertainties. In this paper we present the results of time resolution measurements made with the SuperFGD prototype that consists of 9216 plastic scintillator cubes (cube size is 1 cm
3
) readout with 1728 wavelength-shifting (WLS) fibers along the three orthogonal directions. We used data from a muon beam exposure at CERN. A time resolution of 0.97 ns was obtained for one readout channel after implementing the time calibration with a correction for time-walk effects. The time resolution improves with increasing energy deposited in a scintillator cube,
improving to 0.87 ns for large pulses.
Averaging two readout channels for one scintillator cube further improves the time resolution to 0.68 ns implying that signals in different channels are not synchronous. In addition the contribution from the time sampling interval of 2.5 ns is averaged as well. Most importantly, averaging time values from N channels improves the time resolution by ∼ 1/√(N). For example, averaging the time from 2 scintillator cubes with 2 fibers each improves the time resolution to 0.47 ns which is much better than the intrinsic electronics time resolution of 0.72 ns in one channel due to the 2.5 ns sampling window. This indicates that a very good time resolution should be achievable for neutrons since neutron recoils typically interact with several scintillator cubes and in addition produce larger signal amplitudes than muons. Measurements performed with a laser and a wide-bandwidth oscilloscope in which the contribution from the electronics time sampling window was removed demonstrated that the time resolution obtained with the muon beam is not far from the theoretical limit. The intrinsic time resolution of a scintillator cube and one WLS fiber is about 0.67 ns for signals of 56 photo electrons which is typical for minimum ionizing particles.
The CALICE Semi-Digital Hadronic Calorimeter (SDHCAL) prototype, built in 2011, was exposed to beams of hadrons, electrons and muons in two short periods in 2012 on two different beam lines of the ...CERN SPS. The prototype with its 48 active layers, made of Glass Resistive Plate Chambers and their embedded readout electronics, was run in triggerless and power-pulsing mode. The performance of the SDHCAL during the test beam was found to be very satisfactory with an efficiency exceeding 90% for almost all of the 48 active layers. A linear response (within + or - 5%) and a good energy resolution are obtained for a large range of hadronic energies (5-80 GeV) by applying appropriate calibration coefficients to the collected data for both the Digital (Binary) and the Semi-Digital (Multi-threshold) modes of the SDHCAL prototype. The Semi-Digital mode shows better performance at energies exceeding 30 GeV.
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