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

http://repositorium.sdum.uminho.pt/bitstream/1822/48763/1/1-s2.0-S037026931200857X-main.pdf

Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC

https://digital.csic.es/bitstream/10261/108964/1/experiment%20at%20the%20LHC.pdf

Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC

The ATLAS detector as installed in its experimental cavern at point 1 at CERN is described in this paper. A brief overview of the expected performance of the detector when the Large Hadron Collider begins operation is also presented.

The ATLAS Experiment at the CERN Large Hadron Collider

National Institute of Standards and Technology における超伝導研究及び生活

Proton exchange membrane fuel cell has many distinctive features that made it an attractive alternative clean energy source, including low start-up, high power density, high efficiency, portability and remote applications Commercial application of this energy source had been greatly hindered by series of technical issues ranging from inadequate water and heat management, intolerance to impurities such as CO, slow electrochemical kinetics at electrodes, and relatively high cost An approach to stem the thermal build-up within the fuel cell structure that could lead to degradation of the system components is by integrating cooling channels as part of flow structure of the PEM fuel cell system In this study, a numerical investigation was carried out to investigate the impact of cooling channel geometry in combination with temperature dependent operating parameters on thermal management and overall performance of a PEM fuel cell system The evaluation is performed using a CFD code based on a finite volume approach The systems net power and polarization curves are presented as a function of the system temperature, operating parameters and geometry In addition, the parameters studied were optimized using a mathematical optimization code integrated with the commercial computational fluid dynamics code

/pdf/impact-of-cooling-channel-geometry-on-thermal-management-and-i6q4qnnmxy.pdf

Impact of cooling channel geometry on thermal management and performance of a proton exchange membrane fuel cell

Condensation heat transfer coefficients and enhancements of R134a in smooth and microfin inclined tubes

Heat Transfer Coefficients for Tubes in the Turbulent Single Phase Flow Regime with a Focus on Uncertainty

Numerical and laboratory experiments on a new wing-body-tail configuration

Nanofluids as new composite fluids have found their place as one of the attractive research areas. In recent years, research has increased on using nanofluids as alternative heat transfer fluids to improve the efficiency of thermal systems without increasing their size. Therefore, the examination and approval of different novel modelling techniques on nanofluid properties have made progress in this area. Stability of the nanofluids is still an important concern. Research studies on nanofluids have indicated that electrical conductivity and pH are two important properties that have key roles in the stability of the nanofluid. In the present work, three different sizes of magnesium oxide (MgO) nanoparticles of 20, 40 and 100 nm at different volume fractions up to 3% of the base fluid of ethylene glycol (EG) were studied for pH and electrical conductivity modelling. The temperature of the nanofluids was between 20 and $$70^{\circ }\hbox {C}$$
 for modelling. A genetic algorithm polynomial neural network hybrid system and an adaptive neuro-fuzzy inference system approach have been utilized to predict the pH and the electrical conductivity of MgO–EG nanofluids based on an experimental data set.

/pdf/electrical-conductivity-and-ph-modelling-of-magnesium-oxide-4bzw5q50ua.pdf

Josua P. Meyer

Papers

Impact of cooling channel geometry on thermal management and performance of a proton exchange membrane fuel cell

Condensation heat transfer coefficients and enhancements of R134a in smooth and microfin inclined tubes

Heat Transfer Coefficients for Tubes in the Turbulent Single Phase Flow Regime with a Focus on Uncertainty

Numerical and laboratory experiments on a new wing-body-tail configuration

Electrical conductivity and pH modelling of magnesium oxide–ethylene glycol nanofluids