نتایج جستجو برای: 4040
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رهاسازی مواد آنتی بیوتیکی در محیط زیست خسارات جبران ناپذیری را به محیط زیست اعم از آب و خاک وارد میکنند. تخلیه و انتشار پسابهای آلوده به مواد دارویی که توسط کارخانجات سازنده صورت میگیرد ،ضمن داشتن آثار منفی در اکوسیستم آبی و خاکی ، سبب افزایش مقاومت باکتریهای بیماری زا نسبت به ترکیبات آنتی باکتریال شده که این امر سبب کاهش تاثیر روش درمانی توسط آنتی بیوتیکها میگردد . جلوگیری از به هدر رفتن آنتی ...
It is well accepted that cancer develops following the sequential accumulation of multiple alterations, but how the temporal order of events affects tumor initiation and/or progression remains largely unknown. Here, we describe a mouse model that allows for temporally distinct cancer mutations. By integrating a Flp-inducible allele of K-ras with established methods for Cre-mediated p53 deletion...
J. Krempaský,1 H. Volfová,2 S. Muff,1,3 N. Pilet,1 G. Landolt,1,4 M. Radović,1,5 M. Shi,1 D. Kriegner,6 V. Holý,6 J. Braun,2 H. Ebert,2 F. Bisti,1 V. A. Rogalev,1 V. N. Strocov,1 G. Springholz,7 J. Minár,2,8 and J. H. Dil1,3 1Swiss Light Source, Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland 2Department of Chemistry, Ludwig Maximillian University, 81377 Munich, Germany 3Institute of ...
Brain metabolism is controlled by complex regulation mechanisms. As part of their nature many complex systems show scaling behavior in their timeseries data. Corresponding scaling exponents can sometimes be used to characterize these systems. Here we present maps of scaling exponents derived from BOLD functional Magnetic Resonance Imaging (fMRI) data, and show that they reveal activation patter...
Ming Gong,1,2,* B. Hofer,3 E. Zallo,3 R. Trotta,3,4,† Jun-Wei Luo,5,6,‡ O. G. Schmidt,3 and Chuanwei Zhang2 1Department of Physics, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China 2Department of Physics, The University of Texas at Dallas, Richardson, Texas 75080, USA 3Institute for Integrative Nanosciences, IFW Dresden, Helmholtzstr. 20, D-01069 Dresden, Germany 4...
Basu (2006) argues that the prevalence of 99 cent prices in shops can be explained with rational consumers who disregard the rightmost digits of the price. This bounded rational behaviour leads to a Bertrand equilibrium with positive markups. We use data from an Austrian price comparison site and find results highly compatible with Basu’s theory. We can show that price points in particular pric...
We introduce two novel methods of text categorization in which documents are split into fragments. We conducted experiments on English, French and Czech. In all cases, the problems referred to a binary document classification. We find that both methods increase the accuracy of text categorization. For the Naı̈ve Bayes classifier this increase is significant. 1 Motivation In the process of automa...
In this paper, we analyze two conceptionally different approaches for shape matching: the well-known iterated closest point (ICP) algorithm and variational shape registration via level sets. For the latter, we suggest to use a numerical scheme which was introduced in the context of optic flow estimation. For the comparison, we focus on the application of shape matching in the context of pose es...
J. Sánchez-Barriga, A. Varykhalov, J. Braun, S.-Y. Xu, N. Alidoust, O. Kornilov, J. Minár, K. Hummer, G. Springholz, G. Bauer, R. Schumann, L. V. Yashina, H. Ebert, M. Z. Hasan, and O. Rader Helmholtz-Zentrum Berlin, Albert-Einstein-Strasse 15, 12489 Berlin, Germany Department Chemie, Ludwig-Maximilians-Universität München, Butenandtstrasse 5-13, 81377 München, Germany Joseph Henry Laboratory a...
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