Analysis of transport phenomena and electrochemical reactions in a micro PEM fuel cell with nature inspired flow field design

... convective and diffusive heat and mass transfer, electrode kinetics, transport and phase-change mechanism of water, and potential fields in a micro PEM fuel cell with nature inspired gas flow channels ... fuel cells J Power Sources, 2004, 125(2), 40–51 [16] Maher A. R Sadiq Al-Baghdadi A CFD analysis of transport phenomena and electrochemical reactions in a tubular-shaped PEM fuel cell Int J of Energy ... Sadiq Al-Baghdadi A CFD analysis on the effect of ambient conditions on the hygrothermal stresses distribution in a planar ambient air-breathing PEM fuel cell International Journal of Energy and...

A CFD analysis of transport phenomena and electrochemical reactions in a tubular-shaped PEM fuel cell

... used to analyse and evaluate the performance of a planar and a tubular-shaped PEM fuel cell 2.1 Computational domain The full computational domains for the planar and tubular-shaped PEM fuel cell ... conditions are specified at all external boundaries of the computational domain as well as boundaries for various mass and scalar equations inside the computational domain 2.3.1 Inlets The inlet values ... (a) (b) Figure Three-dimensional computational domains of the planar and tubular-shaped PEM fuel cell: (a) planad and (b) tubular ISSN 2076-2895 (Print), ISSN 2076-2909 (Online) ©2013 International...

Báo cáo lâm nghiệp: "Analysis of snow accumulation and snow melting in a young mountain spruce and beech stand in the Orlické hory Mts., Czech Republic" pptx

... 0.443 beech spruce beech spruce beech ● rain; * snow; ●* rain and snow Statistical significance of differences in the snow water equivalent in the spruce and beech stands in the period of snow accumulation ... research station, the accumulation and intensity of snow melting have continually been studied within a broad research programme in an experimental 438 spruce and beech stand since the winter season ... beech stands and the snow water equivalent 75% higher than in spruce stands In the Orlické hory Mts on the Šerlich mountainside, Krečmer et al (1971) investigated parameters of snowpack in a mature...

Báo cáo khoa học: A comparative analysis of the transcriptome and signal pathways in hepatic differentiation of human adipose mesenchymal stem cells doc

... gene signaling pathway analysis has identiﬁed gene signals that are remarkably activated in AT-MSC-Hepa, and these signals are also up-regulated in whole liver Therefore, the microarray analysis ... protocol, and then treated with deoxyribonuclease (DNase I, ampliﬁcation grade; TaKaRa, Kyoto, Japan) Microarray analysis and data mining (Aligent array) A one-color microarray-based gene expression analysis ... that Gene signaling pathways in AT-MSC-Hepa Elucidating the gene network pathway functioning in AT-MSC-Hepa is very important to reveal the processes of hepatic induction and maintenance of the...

Báo cáo lâm nghiệp: "Paternity analysis of Populus nigra L. oﬀspring in a Belgian plantation of native and exotic poplars" doc

... flowering and no evidence of mating between a female P nigra and a male P nigra cv Italica growing about Paternity analysis of P nigra offspring 350 m apart in Scotland However, flowering of P nigra cv ... located in the total plantation) were analysed using 14 SSR loci (Tab II) Furthermore, P nigra cv Italica, located outside the poplar plantation was also included as a candidate father and was analysed ... stand at a distance of about 500 m to the North The study plot is situated in an agricultural landscape in which there are many poplar plantations of P × canadensis but no stands of P nigra (except...

Báo cáo lâm nghiệp:"Analysis of log shape and internal knots in twenty Maritime pine (Pinus pinaster Ait.) stems based on visual scanning and computer aided reconstruction" pptx

... Figure Log shape and internal knots reconstruction (a) stem cross cutting into logs; (b) scanning of flitches; (c) marking knots on the flitch sawing surface; (d) log and knots reconstruction in ... within the 20 Maritime pine stems MATERIALS AND METHODS 2.1 Tree sampling Twenty Maritime pine (Pinus pinaster Ait.) trees were randomly sampled from a stand in Portugal, the Leiria pine forest ... 3D -computer- aided stem and log reconstruction software, based on input information obtained by image scanning, to twenty 83 years old Maritime pines The stem /log reconstruction is a software module designed...

Báo cáo khao học: "High-resolution analysis of radial growth and wood density in Eucalyptus nitens, grown under different irrigation regimes" potx

... start of spring growth in these trees, and radial growth accelerated around mid August From these measurements hourly and daily increments of stem radius were determined 2.4 Wood data In September ... followed by air-drying This minimized shrinkage, distortion, or possible collapse of wood fibres and vessels Radial profiles of conditioned wood density were determined using SilviScan-2 [11] ... 2.5 Relating stem growth to wood properties Specific software procedures were written in IDL (RSI Inc.) to handle hourly dendrometer data, extracting rates and duration of stem shrinkage and expansion...

Báo cáo khoa học: "Validity of leaf areas and angles estimated in a beech forest from analysis of gap frequencies, using hemispherical photographs and a plant canopy analyzer" pot

... variability in azimuth of the gap fraction A sharper analysis (K and K leads to a ) 22 45 smaller but non-negligible increase in K 3.4 Leaf area index estimation TableI presents estimates of leaf ... the gap fraction at various zenith angles, measured in the two plots with the PCA (n 10) and hemispherical photographs (n 4) Data from the PCA show a regular decrease in both gap fraction and data ... return, it has the enormous advantage of providing, with a single pass, averaged values of the gap fraction at various zenith angles These values are reliable because they are obtained using a wide...

Analysis of passive cooling and heating potential in Vietnam

... improvement of various passive cooling and heating strategies and their combinations The weather in Hanoi is found to be naturally comfortable during only 23.6% of total time of a year whereas in Danang ... Danang and Hochiminh city this value was around 32%, revealing that the climate of Hanoi seems more severe than the others Figure 4: Potential of comfort improvement using passive heating and cooling ... in building design in Hochiminh city Danang is geographically located in the centre of Vietnam, consequently its climate in Fig is intermediate compared to those of Hanoi and Hochiminh city In...

ANALYSIS OF PASSIVE COOLING AND HEATING POTENTIAL IN VIETNAM USING GRAPHICAL METHOD AND TYPICAL METEOROLOGICAL YEAR WEATHER FILE

... determination and interpretation of thermal comfort using calculation of the PMV and PPD indices and local thermal comfort criteria Geneva, 2005 [7] The US Department of Defense: Cooling buildings ... determined 326 Proceedings CISBAT 2011, Lausanne, Switzerland RESULTS 5.1 All year assessment Fig shows the potential for comfort improvement of various passive cooling and heating strategies and ... design in Hochiminh city Danang is geographically located in the centre of Vietnam, consequently its climate in Fig is intermediate compared to those of Hanoi and Hochiminh city In all cities, passive...

Design and analysis of object allocation and replication algorithms in distributed databases for stationary and mobile computing systems

... insights on designing object allocation and replication strategies for DDBSs In conclusion, our research contribution lies in designing adaptive object allocation and replication algorithms and ... Environments In this chapter, we address the object allocation and replication issues of OMP in DDBSs in the application domain of SCEs Designing an intelligent and eﬃcient object allocation and replication ... one of the main problems is in designing eﬃcient policies to handle on-line requests arriving at the system with a minimum cost and maintain the consistency of multiple replicas of objects in...

báo cáo hóa học: " A comparison of general and ambulance specific stressors: predictors of job satisfaction and health problems in a nationwide one-year follow-up study of Norwegian ambulance personnel" doc

... Sterud et al.: A comparison of general and ambulance specific stressors: predictors of job satisfaction and health problems in a nationwide one-year follow-up study of Norwegian ambulance personnel ... among ambulance personnel are mainly related to ambulance specific stressors • Health complaints and low job satisfaction among ambulance personnel are mainly related to general job- related stressors ... http://www.occup-med.com/content/6/1/10 Page of Table Means, standard deviations and comparison between the sample available at T1 only and the sample available at both T1 and T2 Sample T-test (T1 and T2) sample vs sample (n...

Báo cáo lâm nghiệp: "Changing electrophoretic patterns of glutamate dehydrogenases and aspartate aminotransferases in a few tree species under the influence of ectomycorrhization" potx

... traces in the mycorrhiza, which exhibited a high level of NAD-GDH activity as did the non-mycorrhizal roots (Fig B) As for aspartate aminotransferase, the distinct isoforms found in mycorrhizas, ... Spruce-Hebeloma sp associa- tion, gel electrophoresis confirmed the presence of NAD-GDH in the host cells (one band) and the presence of a high level of NADP-GDH activity in the fungus (one major band and one ... confirmed these results: the vascular cylinder free of fungus and the cortical region including host cells and fungal hyphae revealed identical isoforms, while no activity was found in the peri- pheral...

Báo cáo y học: "Eyes wide shut - unusual two stage repair of pectus excavatum and annuloaortic ectasia in a 37 year old marfan patient: case report." pdf

... article as: Grapow et al.: Eyes wide shut - unusual two stage repair of pectus excavatum and annuloaortic ectasia in a 37 year old marfan patient: case report Journal of Cardiothoracic Surgery 2011 ... decade reports about successful simultaneously performed single -stage repairs became evident [ 4-6 ] We now report about an unusual two- stage repair of a pectus excavatum and an annuloaortic ectasia ... venous cannulation using a two- stage cannula placed into the right atrium cardiopulmonary bypass was started The Figure X-ray at readmission Red Arrows indicating the crack and dislocation of the...

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