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Search Results: 1 - 10 of 167764 matches for " E. Erdmann "
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Leitliniengestützte Therapie der Herzinsuffizienz
Hoppe UC,Erdmann E
Journal für Kardiologie , 2003,
Abstract: Durch eine Verbesserung der Pharmakotherapie bei chronischer Herzinsuffizienz konnten in den letzten Jahren die Morbidit t und Letalit t herzinsuffizienter Patienten deutlich reduziert werden. Die Basistherapie der systolischen Herzinsuffizienz umfa t ACE-Hemmer und Betablocker, bei Flüssigkeitsretention zus tzlich Diuretika. Bei persistierender Symptomatik ist die additive Gabe von Herzglykosiden sowie in den Stadien NYHA III IV der zus tzliche Einsatz von Spironolacton indiziert. AT1-Rezeptorblocker haben sich als sinnvolle Alternative zu ACE-Hemmern bei Vorliegen von ACE-Hemmer-Nebenwirkungen/-Kontraindikationen etabliert. Darüber hinaus vermindern AT1-Rezeptorblocker in Kombination mit ACE-Hemmern die Hospitalisationsrate, wenn kein Betablocker vertragen wird. Durch den Einsatz evidenzbasierter Therapiestrategien, die jedoch stets an den individuellen Patienten angepa t werden müssen, kann die Prognose herzinsuffizienter Patienten deutlich verbessert werden.
On the global and \nabla-filtration dimensions of quasi-hereditary algebras
Karin Erdmann,Alison E. Parker
Mathematics , 2005,
Abstract: In this paper we consider how the \nabla-, \Delta- and global dimensions of a quasi-hereditary algebra are interrelated. We first consider quasi-hereditary algebras with simple preserving duality and such that if \mu < \lambda then \nabla fd(L(\mu)) < \nabla fd(L(\lambda)) where \mu, \lambda are in the poset and L(\mu), L(\lambda) are the corresponding simples. We show that in this case the global dimension of the algebra is twice its \nabla-filtration dimension. We then consider more general quasi-hereditary algebras and look at how these dimensions are affected by the Ringel dual and by two forms of truncation. We restrict again to quasi-hereditary algebras with simple preserving duality and consider various orders on the poset compatible with quasi-hereditary structure and the \nabla-, \Delta- and injective dimensions of the simple and the costandard modules.
Integrating Chemistry, Electricity and Magnetism into Dynamical Natural Philosophy: J. F. Fries’s Extension of Kant’s Metaphysical Foundations  [PDF]
Erdmann G?rg
Advances in Historical Studies (AHS) , 2014, DOI: 10.4236/ahs.2014.31006
Abstract: Kant’s Metaphysical Foundations of Natural Science has an almost exclusive focus on Newton’s Philosophiae Naturalis Principia Mathematica. Other research fields like electrostatics, magnetism, chemistry or biology are hardly dealt with. A successor of Kant, the philosopher, natural scientist and mathematician Jakob Friedrich Fries (1773-1843), accommodates Kant’s major thoughts on a metaphysical foundation but aims at assisting natural science of his time by employing a heuristic interpretation of Kant’s fundamental forces. In my paper, I will trace Fries’s application of his heurist maxims on the development of other evolving fields of research. This will provide concrete examples on how Fries thought philosophy to support science. For that reason, I will highlight the different status that Kant and Fries concede non-mechanic research areas. To restrict the analysis, I will focus on the actual incorporation of chemical dissolution, Coulomb’s law and magnetism into Kantian Dynamics as a concrete example of Fries’s methodology.
Radiation and breast cancer: a review of current evidence
Cécile M Ronckers, Christine A Erdmann, Charles E Land
Breast Cancer Research , 2004, DOI: 10.1186/bcr970
Abstract: The mammary gland is very sensitive to radiation-associated carcinogenesis, especially after exposures at young ages. Many aspects of the association between radiation and breast cancer have been elucidated in the past decades. This review is intended to summarize widely recognized features of radiation-associated breast cancer and to add a more detailed overview of relevant recent findings, especially focusing on factors that modify the radiation-related risk.In 2000, breast cancer was the most common malignant disease in women worldwide, with an estimated 1.05 million cases. Owing to high levels of screening in developed countries and the relatively favorable prognosis of early-stage disease, it is also the most prevalent malignancy in women, with almost 4 million women alive who have had breast cancer in the past 5 years [1]. In the USA, it is estimated that about 216,000 women will be diagnosed with breast cancer in 2004 and that 40,000 will die from the disease [2]. Male breast cancer is a rare disease, with an incidence about 1/100 of that for female breast cancer [2].Breast cancer is very rare before age 30 years, after which incidence rises steeply with advancing age up to about age 50 years. Thereafter, incidence still increases with age, but more slowly [3]. The strong dependence on age, as seen for many other adult-type cancers, is probably related to accumulating genetic damage that occurs during a human lifespan. The apparent change in slope of the age–incidence curve at about age 50 years is unique for breast cancer, and this is presumably related to hormonal changes associated with menopause, which is accompanied by a decrease in circulating estrogen levels [3]. Estrogens and other hormones are thought to affect the progression of initiated mammary gland cells in the path to malignancy. This has been shown clearly in early rodent studies, where chemical-associated or radiation-associated mammary tumors were most abundant after additional hormonal stim
Surface modifications of volcanic glasses (perlites) by water vapor
Abalos,R.; Erdmann,E.; Destefanis,H.A.;
Latin American applied research , 2003,
Abstract: hydrothermal treatments on expanded volcanic glasses (perlites) were studied. the main objective of this paper is to obtain an activated surface able to interact with specific chemical substances. the above mentioned treatment consists on exposing the glass surface to water vapor at temperatures over 250a°c at the correspondent vapor pressure during different periods of time and for different size of particles. the glass surface modifications were studied by ir, dta-tg and adsorption techniques. the grade of surface activation was tested by studying the chemical interaction with polysiloxane polymers.
New material as support for nickel boride catalyst
D. Acosta,J. Martinez,C. Carrera,E. Erdmann
Latin American applied research , 2006,
Abstract: The main objective of this work is to study the feasibility of new materials to be used as support for boron-nickel catalysts. Potential support materials such as: silica gel, alumina, hydrothermal modified Perlites and zeolite 4A, were characterized by BET, TPR and DRX. After the addition of Ni and B, their catalytic activity evaluated with the nitrobenzene hydrogenation model reaction. The influence of operational parameters during the impregnation process such as order of reactants, speed of agitation, time of aging and it influences from the previous thermal treatment were evaluated. The results show that the adequate materials to be used as catalysts supports are the commercial silica and Rehydroxilated Perlite. It is due to the existence of superficial OH groups, which allow the anchorage of the nickel boride catalyst.
Surface modifications of volcanic glasses (perlites) by water vapor
R. Abalos,E. Erdmann,H.A. Destefanis
Latin American applied research , 2003,
Abstract: Hydrothermal treatments on expanded volcanic glasses (perlites) were studied. The main objective of this paper is to obtain an activated surface able to interact with specific chemical substances. The above mentioned treatment consists on exposing the glass surface to water vapor at temperatures over 250 °C at the correspondent vapor pressure during different periods of time and for different size of particles. The glass surface modifications were studied by IR, DTA-TG and adsorption techniques. The grade of surface activation was tested by studying the chemical interaction with polysiloxane polymers.
Dimensions of Higher Extensions for SL_2
Karin Erdmann,Keith C. Hannabuss,Alison E. Parker
Mathematics , 2012,
Abstract: We analyse the recursive formula found for various Ext groups for $\SL_2(k)$, $k$ a field of characteristic $p$, and derive various generating functions for these groups. We use this to show that the growth rate for the cohomology of $\SL_2(k)$ is at least exponential. In particular, $\max \{\dim \Ext^i_{\SL_2(k)}(k, \Delta(a))\mid a,i \in \N \}$ has (at least) exponential growth for all $p$. We also show that $\max \{\dim \Ext^i_{\SL_2(k)}(k, \Delta(a))\mid a\in \N \}$ for a fixed $i$ is bounded.
Representation theory of the Drinfel'd doubles of a family of Hopf algebras
K. Erdmann,E. L. Green,N. Snashall,R. Taillefer
Mathematics , 2004,
Abstract: We investigate the Drinfel'd doubles $D(\Lambda_{n,d})$ of a certain family of Hopf algebras. We determine their simple modules and their indecomposable projective modules, and we obtain a presentation by quiver and relations of these Drinfel'd doubles, from which we deduce properties of their representations, including the Auslander-Reiten quivers of the $D(\Lambda_{n,d})$. We then determine decompositions of the tensor products of most of the representations described, and in particular give a complete description of the tensor product of two simple modules. This study also leads to explicit examples of Hopf bimodules over the original Hopf algebras.
Diffraction and Low-Q^2 Physics Including Two-Photon Physics
Martin Erdmann
Physics , 1998,
Abstract: Recent experimental results on the partonic structure of the photon and on the color singlet exchange in strong interaction processes are reviewed. At the LEP electron-positron and HERA lepton-proton colliders, complementary and consistent measurements have been achieved on the quark-gluon structure of quasi-real and virtual photons. At the HERA lepton-proton and Tevatron proton-antiproton colliders, the quark-gluon configuration of the diffractive exchange is consistently found to have a large gluon component. The rate of diffractive interactions observed by the HERA and Tevatron experiments, however, is largely different and challenges explanation (invited plenary talk at the XXIX International Conference on High Energy Physics, Vancouver, B.C. Canada (1998)).
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