The problems of the first-passage time (FPT) [1, 2] and the residence time (RT) [3] are very important issues in random walk theory. Moreover, several properties of diffusion and transport in disordered systems are based in this concepts. Here, we do not want to present a survey of the enormous literature in the field of mean firstpassage time (MFPT) and mean residence time (MRT) of random walk...

C ONSERVATIVE management of anuria has in many instances prolonged life.― This involves the correction of water and electrolyte deficits and the utilization of the protein-sparing effects of glucose to decrease the rate of tissue catabolism. These measures attempt to preserve the integrity of the body fluids, thus retarding the accumu@ lation of toxic substances, i.e., potassium, and reducing...

Residence time is a critical factor in determining the size of an open face biofilter. Four test biofilters were constructed with media comprised of yard waste compost and brush chips to compare 8 s. and 4 s. residence time. Biofilter performance was monitored for ten months by measuring pressure drop, moisture content, odor threshold, hydrogen sulfide, and ammonia concentrations. Odor reductio...

Breast tumor cytosol has been analyzed for the presence of a proges terone-binding protein (PBCP), commonly present in benign breast cysts in huge concentrations. In 377 primary carcinomas investigated PBCP was present in measurable quantities in 60.7% using "rocket" immunoelectrophoresis. Concentrations of PBCP ranged from 0 to 12.4% of total cytosol protein with an average of 4.0 «ig/mg cyto...

Abs trac t. We develop a new computa tional meth od for modeling and inverting fre­ qu ency domain airborne electromag ne tic (EM) data. Our method is based on the con­ traction integral equa tion meth od for forward EM modeling and on inversion using the localized quasi-linear (LQL) approximation followed by the rigorous inversion, if necessary. The LQL inversion serves to provide a fast image...

Variability of residence time in the Tropical Tropopause Layer during Northern Hemisphere winter K. Krüger, S. Tegtmeier, and M. Rex Leibniz-Institute for Marine Sciences at Kiel University (IFM-GEOMAR), Kiel, Germany Environment Canada, Toronto, Canada Alfred Wegener Institute for Polar and Marine Research, Potsdam, Germany Received: 18 April 2009 – Accepted: 15 May 2009 – Published: 28 May 20...

In our research we explore the role of negotia tion for con ict resolution in distributed search among heterogeneous and reusable agents We present negotiated search an algorithm that ex plicitly recognizes and exploits con ict to direct search activity across a set of agents In nego tiated search loosely coupled agents interleave the tasks of local search for a solution to some subproblem inte...

In this paper, a tree-shaped power distribution network is designed based on constructal theory for planar EBG structure power plane on PCB, in order to optimize DC performance. Planar EBG structures suppress noise, and the network provides currents to them. This network is composed of hierarchical metal paths. The geometric parameters can be optimized based on the concept of constructal theory...