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Impact of g-Load Shift on Temporal Expression Pattern of Apoptosis-linked Proteins in the Rat Mammary Gland

impact of microgravity and hypergravity on endothelial cells Biomed Research International 2015 434803 Maier JA, Cialdai F, Monici M, Morbidelli L (2015b) The impact of microgravity and hypergravity on endothelial cells. Biomed Research International 2015, 434803. Maier JA Cialdai F Monici M Morbidelli L 2015b The impact of microgravity and hypergravity on endothelial cells Biomed Research International 2015 434803 Mattern J, Volm M (2004) Imbalance of cell proliferation and apoptosis during progression of lung carcinomas

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The Research Search For The Least Beneficial Overcast Sky And Progress In Defining Its Luminance Gradation Function

Abstract

Recently illuminance levels under ISO/CIE homogeneous standard sky types were characterised in their relative terms after ISO/CIE (2004, 2003) standardised as normalised by the luminance in the zenith. Sky luminance and horizontal illuminance based on the gradation and scattering indicatrix functions, including the extreme overcast cases frequently encountered in nature, were recently determined in absolute physical units of luminance in kilocandles per meter square and of illuminance in kilolux. The historical search to find energy and visibility critical sky luminance distributions shows a progression of steps in studying the worst or critical overcast situations. That progression has enabled the determination and evaluation of interior illuminance for comparison of the merits of dual daylighting and artificial lighting under established criteria for comfortable visibility.

Open access
Slurry shield tunneling in soft ground. Comparison between field data and 3D numerical simulation

installation of the shield), the lining is installed at the rear of the shield. The grout elements are then activated in their liquid state with the application of the injection pressure on the boundary of the excavated tunnel and lining external face. After installing five tunnel rings with lining elements at the back of the shield (the average advance of TBM in this project is 5 m a day), the injection pressure is deactivated gradually and the mechanical characteristics of the grout changed to the hardened ones. This procedure is repeated throughout the shield progression

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Kinetics of oxygen adsorption on ZnS nanoparticles synthesized by precipitation process

Chapman-Enskog theory, the diffusion coefficient of gas molecules in the surface adsorption phenomena is proportional to T n . T is the temperature in Kelvin and n is a number between 1.5 and 1.8, so the diffusion coefficient of the surface oxygen increases with temperature and the oxygen adsorption at 90 °C is higher than at 70 °C. Since the enhancement of the PL intensity is related to increasing of the surface oxygen, assuming that 99 % of the adsorption has been completed until the final reaction time t f , the reaction progression at time t, f(t), can be calculated

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Finite Element Analysis Of Influence Of Flank Wear Evolution On Forces In Orthogonal Cutting Of 42CrMo4 Steel

Abstract

This paper presents analysis of flank wear influence on forces in orthogonal turning of 42CrMo4 steel and evaluates capacity of finite element model to provide such force values. Data about magnitude of feed and cutting force were obtained from measurements with force tensiometer in experimental test as well as from finite element analysis of chip formation process in ABAQUS/Explicit software. For studies an insert with complex rake face was selected and flank wear was simulated by grinding operation on its flank face. The aim of grinding inset surface was to obtain even flat wear along cutting edge, which after the measurement could be modeled with CAD program and applied in FE analysis for selected range of wear width. By comparing both sets of force values as function of flank wear in given cutting conditions FEA model was validated and it was established that it can be applied to analyze other physical aspects of machining. Force analysis found that progression of wear causes increase in cutting force magnitude and steep boost to feed force magnitude. Analysis of Fc/Ff force ratio revealed that flank wear has significant impact on resultant force in orthogonal cutting and magnitude of this force components in cutting and feed direction. Surge in force values can result in transfer of substantial loads to machine-tool interface.

Open access