objective: the aim of this study was to evaluate the non-genomic action of thyroxin on sperm kinetic and its probable use to improve sperm recovery after applying an enrichment method like “swim-up” in comparison with the available one, pentoxifylline. materials and methods: this is an experimental study. a total of 50 patients were recruited, followed by infertility consultation. conventional ...

Paul N. Patrone1,2,∗ Russel E. Caflisch3,† and Dionisios Margetis4‡ Department of Physics, and Institute for Research in Electronics and Applied Physics, University of Maryland, College Park, Maryland 20742, USA Center for Nanoscale Science and Technology, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA Department of Mathematics, and Institute for Pure and Appl...

By changing the temperature, pH, stirring rate, or time for calcium carbonate crystallization, complex shapes of aggregated calcium carbonates formed. Such shapes have earlier been ascribed to specific interactions with specialized additives. Without polymeric additives, aggregates of vaterite transformed more rapidly into calcite aggregates under slow than under fast stirring. With an anionic ...

This paper combines techniques of potential shaping with those of kinetic shaping to produce some new methods for stabilization of mechanical control systems. As with each of the techniques themselves, our method employs energy methods and the LaSalle invariance principle. We give explicit criteria for asymptotic stabilization of equilibria of mechanical systems which, in the absence of control...

background: investigating the performance of naturally operated treatment plants may be due to the fact that they cannot be operated as desired, or that they should be modified to achieve good performance e.g. for nutrients removal. the advantage of kinetic coefficient determination is that the model can be adjusted to fit data and then used for analyzing alternatives to improve the process. th...

1Department of Health, Campus Teresina Central, Federal Institute of Education, Science and Technology of Piauí, Teresina, PI, Brazil, 2Department of Pharmacy, State University of Paraíba, Campina Grande, PB, Brazil, 3College of Pharmacy, Campus Minister Petronio Portela, Federal University of Piauí, Teresina, PI, Brazil, 4Laboratory of Experimental Neurochemistry Research, Federal University o...

Modeling, simulation, and integrated guidance-control of a kinetic warhead utilizing moving-mass actuators are discussed. Moving masses can be used in any speed range both in the atmosphere as well as outside it, as long as there is a force, either aerodynamic or propulsive, acting on the vehicle. The moving-mass actuation technique offers significant advantages over conventional aerodynamic co...

The identification of kinetic models is an important step for the monitoring, control and optimization of chemical processes. Kinetic models are often based on first principles that describe the evolution of concentrations by means of conservation and constitutive equations. Identification of reaction kinetics, namely, rate expressions and rate parameters, represents the main challenge in const...

This paper presents region-based a ne motion parameter clustering methods by motion-vector and intensity matching to provide improved robustness and alignment of motion boundaries with real object boundaries. Regions may be formed as xedor variable-size rectangular blocks, triangular patches, or arbitrary-shaped areas de ned by color or texture uniformity. A particular combination of these a ne...