Objective The quality of semen depends upon several factors such as environment, life style, physical activity, age and occupation. The aim of this study was to analyze and compare the conventional and functional semen parameters in men who practice vigorous physical activity to those of sedentary men. MaterialsAndMethods Semen samples from 17 physically active men and 15 sedentary men were col...

We derive physical parameters of galaxies from their observed spectrum, using MOPED, the optimized data compression algorithm of Heavens, Jimenez & Lahav (2000). Here we concentrate on parametrising galaxy properties, and apply the method to the NGC galaxies in Kennicutt’s spectral atlas. We focus on deriving the star formation history, metallicity and dust content of galaxies. The method is ve...

We present a method called MOPED for optimizing energetic and structural parameters in computational models, including all-atom energy functions, when native structures and decoys are given. The present method goes beyond previous approaches in treating energy functions that are nonlinear in the parameters and continuous in the degrees of freedom. We illustrate the method by improving solvation...

While video images are currently considered as two-dimensional (2D) entities, a recent trend is to extend video towards a 3D representation. In current video-coding algorithms like MPEG-4, global camera-motion is described as a set of abstract parameters, which have no direct relation to the physical camera movement. To bring physical meaning to these parameters, we present a new algorithm for ...

Zur Evaluierung des Wirkmechanismus, der Vergleichbarkeit unterschiedlicher StoßwellenqueUen und zur Erstellung von Therapiestandards der ESWT (Extracorporale Stoßwellentherapie) ist die meßtechnische Erfassung und Kenntnis der physikalischen Parameter Voraussetzung. Die genauesten Meßergebnisse werden mit Glasfaserhydrophonen erzielt. Einer typischen Schalldruckkurve können somit verschiedene ...

Do increasing doses of electromagnetic fields (EMFs) increase the hazards effect on blood? Studies on the blood of rats provide guidance for the assessment of occupational and public health significance of exposure to EMFs. Here, apparent additive viscosity of animal blood after exposing to EMFs (3,5 and 10 gauss) is examined. The results indicate that hematocrite (HCT) increased as EMF increas...

Global-motion estimation algorithms as they are employed in the MPEG-4 or H.264 video coding standards describe motion with a set of abstract parameters. These parameters model the camera motion, but they cannot be directly related to a physical meaning like rotation angles or the focal-length. We present a two step algorithm to factorize these abstract parameters into physically meaningful ope...

We consider the constraints that can be derived from the spectral shape and variability of TeV blazars on the homogeneous synchrotron self–Compton (SSC) model. Assuming that the relativistic electron spectrum is a broken power law, where the break energy is a free parameter, we write analytical formulae that allow to connect observable quantities to the physical parameters of the model.We give ...