rupture and wrinkling are two prevalent phenomena that happen in hydro-forming process. many efforts have been made to achieve the upper and lower bounds for the pressure related to rupture and wrinkling of sheet, respectively. the aim of this investigation is to improve the upper bound of fluid pressure in hydro-forming process by hemispherical punch. in this article, analytical study of the u...

Alix, Philippe, Francoise Grolleau, and Bernard Hue. Ca /Calmodulin-dependent protein kinase regulates GABA-activated chloride current in cockroach dorsal unpaired median (DUM) neurons. J Neurophysiol 87: 2972–2982, 2002; 10.1152/jn.00631.2001. We studied -aminobutyric acid (GABA)-mediated currents in short-term cultured dorsal unpaired median (DUM) neurons of cockroach Periplaneta americana us...

We optimize three-dimensional snake kinematics for locomotor efficiency. assume a general space-curve representation of the backbone with small-to-moderate lifting off ground and negligible body inertia. The cost locomotion includes work against friction internal viscous dissipation. When restricted to planar kinematics, our population-based optimization method finds same types optima as previo...

OBJECTIVES To identify independent predictors for development of pressure ulcers in hospitalized patients and to develop a simple prediction rule for pressure ulcer development. DESIGN The Prevention and Pressure Ulcer Risk Score Evaluation (prePURSE) study is a prospective cohort study in which patients are followed up once a week until pressure ulcer occurrence, discharge from hospital, or ...

We study the condensation of closed string tachyons as a time-dependent process. In particular, we study tachyons whose wave functions are either space-filling or localized in a compact space, and whose masses are small in string units; our analysis is otherwise general and does not depend on any specific model. Using world-sheet methods, we calculate the equations of motion for the coupled tac...

In this document the design, control and simulation of a hydraulic model for grasping an object is presented. The principal equations that constraint such a system are first investigated through the presentation of the hydraulic components which constitute the model. Their intrinsic characteristics are discussed as well as their interactions with each other. The controller that best fit this ap...

The inhibitory effect of levamisole and L-homoarginine on alkaline phosphatases (ALP, orthophosphoric monoester phosphohydrolase, EC. 3.1.3.1) in various tissues was studied to characterize differences in the mechanism of inhibition of ALP isoenzymes. The ALP activity from the placenta, kidneys, and a clonal osteogenic cell line, MC3T3-E1, was hyperbolically inhibited with a dependency on the c...

In many photosynthetic organisms, tight-binding Rubisco inhibitors are released by the motor protein Rubisco activase (Rca). In higher plants, Rca plays a pivotal role in regulating CO2 fixation. Here, the ATPase activity of 0.005 mm tobacco Rca was monitored under steady-state conditions, and global curve fitting was utilized to extract kinetic constants. The kcat was best fit by 22.3 ± 4.9 mi...

We develop an approach for computing the hydrodynamic friction tensor and scalar friction coefficient for an aerosol fractal aggregate in the transition regime. Our approach involves solving the Bhatnagar-Gross-Krook equation for the velocity field around a sphere and using the velocity field to calculate the force on each primary sphere in the aggregate due to the presence of the other spheres...

Journal bearings in hermetic reciprocating compressors are analyzed experimentally as well as numerically. The motor current and the load applied to the bearing are measured to obtain the performance curve of the journal bearing, from which the critical Sommerfeld number is derived. In the numerical analysis, the Reynolds equation and equilibrium equations of the journal center are solved simul...