다중혈관 관상동맥 환자에서 y-문합을 이용하여 양쪽 내흉동맥만을 사용한 우회술의 조기 성적

IEEE Transactions on Pattern Analysis and Machine Intelligence

KamLAND has measured the flux of nu;(e)'s from distant nuclear reactors. We find fewer nu;(e) events than expected from standard assumptions about nu;(e) propagation at the 99.95% C.L. In a 162 ton.yr exposure the ratio of the observed inverse beta-decay events to the expected number without nu;(e) disappearance is 0.611+/-0.085(stat)+/-0.041(syst) for nu;(e) energies >3.4 MeV. In the context of two-flavor neutrino oscillations with CPT invariance, all solutions to the solar neutrino problem except for the "large mixing angle" region are excluded.

First Results from KamLAND: Evidence for Reactor Anti-Neutrino Disappearance

A measurement of the Higgs boson mass is presented based on the combined data samples of the ATLAS and CMS experiments at the CERN LHC in the H→γγ and H→ZZ→4l decay channels. The results are obtained from a simultaneous fit to the reconstructed invariant mass peaks in the two channels and for the two experiments. The measured masses from the individual channels and the two experiments are found to be consistent among themselves. The combined measured mass of the Higgs boson is mH=125.09±0.21 (stat)±0.11 (syst)  GeV.

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Combined Measurement of the Higgs Boson Mass in pp Collisions at √s=7 and 8 TeV with the ATLAS and CMS Experiments

The simulation software for the ATLAS Experiment at the Large Hadron Collider is being used for large-scale production of events on the LHC Computing Grid. This simulation requires many components, from the generators that simulate particle collisions, through packages simulating the response of the various detectors and triggers. All of these components come together under the ATLAS simulation infrastructure. In this paper, that infrastructure is discussed, including that supporting the detector description, interfacing the event generation, and combining the GEANT4 simulation of the response of the individual detectors. Also described are the tools allowing the software validation, performance testing, and the validation of the simulated output against known physics processes.

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The ATLAS Simulation Infrastructure

/pdf/end-user-evaluation-of-sharp-for-analysis-of-sodium-cooled-1ng7cmgz47.pdf

End-User Evaluation of SHARP for Analysis of Sodium-Cooled Fast Reactors

This paper summarizes the extensive structural analysis and design of the support saddles for the Extended Barrel of the ATLAS Tilecalorimeter that has taken place at Argonne National Laboratory over the past several months. This work has been a continuation and expansion of work that has taken place over the course of several years within the ATLAS Tilecalorimeter collaboration. This paper will be divided into four main sections. Section 1 is the introduction to the analysis and will give a brief history of the work that had previously been done. Section 2 examines the design and structural analysis that has occurred on the support saddles. The design of the support saddles has evolved over the last few months. There are three main analyses of the saddles that are discussed in Section 2. First, the forces that act upon the support saddles and the resulting deflections and stresses are examined when the support saddle is subjected only to gravity loading. Next, the saddles are examined when subjected to a combination of gravity and a seismic load of .15g in the X, Y, and Z directions. Finally, the saddles are analyzed when subjected to a combination of gravity, magnetic, and seismic loading. Section 3 describes a detailed analysis of the back cryostat support structure in the Extended Barrel. This design has evolved significantly throughout the analysis process and every design iteration and analysis is described in detail. The initial design is described in Section 3.1 that analyzed the back cryostat support only under vertical static loading. Section 3.2 then examines the stiffening of the cryostat support plate that had to be included in the design in order to provide sufficient stiffness in the case of seismic loading in the X, Y, and Z directions. Finally, Section 3.3 describes the final design, which has a modified stiffener.

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Extended barrel support saddle design and analysis.

In order to form internal cells in PVC extrusions, the die requires an insert or internal member that the material flows past. These inserts are supported to the outer die structure by so-called spiders that pass through the extrusion wall. The extruded material must separate and the recombine as it passes over the spider. The material must then form a bond at this interface shortly before exiting the die. These interfaces are referred to as knit-lines. In a recent project involving a large and complex PVC extrusion, difficulty was encountered in developing these knit lines within the webs of the extrusions. Upon visual inspection, these interfaces appeared to be without bond over portions of the cross section. However, mechanical testing in the worst knits revealed that bonding had occurred with the knit providing 85% or the bulk material strength although without support any significant ductility. At the same time, knits at different parts of the extrusions showed ductility comparable with the base material. Altering the process variables showed a means for improvement in the webs but this was limited by other constraints. While these knits were sufficiently strong for short duration loading, the real question was the time dependent strength such as creep rupture over long times and how the behavior of the knit compared with the bulk material. In this work we describe the character of the knitlines and the resulting mechanical properties. We then discuss the preliminary results of accelerated creep rupture tests which indicate that the creep rupture behavior of the partially interfaces follow a time temperature superposition relationship allowing accelerated prediction of the knit-line rupture. We propose a model for

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Evaluation of Mechanical Properties at the Knit Line Interface in a Complex Multi-Cell PVC Extrusion

A new method for implementing contact/impact in an implicit finite element formulation has recently been developed. The method uses the idea of buoyancy and fluid drag forces to enforce the contact constraint as well as provide a method of dissipating energy due to the contact. Additionally, the method provides a simplified means for accounting for contact friction. The method has potential usefulness in a certain class of problems such as contact with bodies having soft and viscous foundations as well as problems with sliding. In this work, we introduce the method and illustrate it with an example that shows the benefits and utility of the method.Copyright © 2014 by ASME

A Novel Method for the Implementation of Contact Including Energy Dissipation in Finite Element Methods

The Mu2e field mapping system is designed to produce high accuracy field maps of the detector solenoid used in the experiment. The data acquisition system is mobile and uses a self-propelled mapper with rotating arms equipped with 3D Hall probes. The measurements require not only accurate magnetic field readouts, but also accurate locations of all Hall probes while measuring data. The latter is accomplished by using the laser tracker to measure positions of several retroreflectors on the field mapper during data acquisition. The measurement process requires scanning the whole space inside the large solenoid and takes many hours to complete, which necessitates its full automation. The automation software includes control of the mapper, readout of Hall and NMR probes and control of a laser tracker, including prediction of retroreflector positions and execution of quality control checks. The software architecture and data acquisition hardware of the field mapping system are described, with special attention given to control of the laser tracker and its integration with the rest of the system.

J. J. Grudzinski

Papers

End-User Evaluation of SHARP for Analysis of Sodium-Cooled Fast Reactors

Extended barrel support saddle design and analysis.

Evaluation of Mechanical Properties at the Knit Line Interface in a Complex Multi-Cell PVC Extrusion

A Novel Method for the Implementation of Contact Including Energy Dissipation in Finite Element Methods

Software Architecture and Hardware Organization in Mu2e Solenoid Field Mapping System