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Search Results: 1 - 10 of 1637 matches for " Josef Speth "
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Landau Migdal Theory of Interacting Fermi Systems: A Framework for Effective Theories in Nuclear Structure Physics
Frank Gruemmer,Josef Speth
Physics , 2006, DOI: 10.1088/0954-3899/32/7/R01
Abstract: We review Migdal's Theory of Finite Fermi Systems and its application to the structure of nuclei. The theory is an extension of Landau's Theory of Interacting Fermi Systems. In the first part the basic formulas are derived within the many body Green functions approach. The theory is applied to isovector electric giant resonances in medium and heavy mass nuclei. The parameterizations of the enormalized effective ph-interaction and the effective operators are discussed. It is shown that the number of free parameters are restricted due to conservation laws. We also present an extension of Migdal's theory, where the low-lying phonons are considered in a consistent manner. The extended theory is again applied to the same isovector electric giant resonances and to the analysis of $(\alpha,\alpha^\prime)$ reaction data. We point out that the extended theory is the appropriate frame for self consistent nuclear structure calculations starting from effective Lagrangians and Hamiltonians.
Current log-periodic view on future world market development
Stanislaw Drozdz,Jaroslaw Kwapien,Pawel Oswiecimka,Josef Speth
Quantitative Finance , 2008,
Abstract: Applicability of the concept of financial log-periodicity is discussed and encouragingly verified for various phases of the world stock markets development in the period 2000-2010. In particular, a speculative forecasting scenario designed in the end of 2004, that properly predicted the world stock market increases in 2007, is updated by setting some more precise constraints on the time of duration of the present long-term equity market bullish phase. A termination of this phase is evaluated to occur in around November 2009. In particular, on the way towards this dead-line, a Spring-Summer 2008 increase is expected. On the precious metals market a forthcoming critical time signal is detected at the turn of March/April 2008 which marks a tendency for at least a serious correction to begin. In the present extended version some predictions for the future oil price are incorporated. In particular a serious correction on this market is expected to start in the coming days.
“Into the dwelling of the hermit”: Imaginative Space in E.A. Poe’s The Fall of the House of Usher
Jana Speth
Trans : Revue de Littérature Générale et Comparée , 2011,
Abstract: L’article analyse, à l’aide de notions tirées de la psychologie cognitive, tels que les “scripts”, les “concepts” et la “transformation mentale”, la tendance naturelle du lecteur à la construction de sens, c’est-à-dire son aptitude à inférer par l’imagination les informations manquantes d’une architecture imaginaire lacunaire donnée. La narration La chute de la maison d’Usher de E.A. Poe, grace à une mise en abyme, évoque deux réalités imaginaires différentes qui finalement chutent pour faire place à un seul espace focalisé. Les méthodes de Poe qui stimulent la construction des espaces imaginaires aussi bien que leur déconstruction seront analysées avec les outils que nous fournit la neuropsychologie. A hermit lives in complete seclusion from the outer world, and the fictional hermit in E.A. Poe’s narrative enjoys the twofold seclusion of a doubly imaginative space constructed by the reader. Only the deconstruction of the mise en abyme, along with its superordinate fictional space – carefully staged by the author and executed by the reader – poses a threat to his existence, and will finally lead to The Fall of the House of Usher. El artículo analiza con ayuda de nociones extraídas de la psicología cognitiva, como los “scripts”, los “conceptos” y la “transformación mental”, la tendencia natural del lector a construir sentido, es decir, su aptitud para inferir mediante la imaginación las informaciones ausentes en una determinada arquitectura imaginaria y de carácter fragmentario. La narración La caída de la casa Usher, gracias a una mise en abyme, evoca dos realidades imaginarias diferentes que finalmente caen para dar lugar a un único espacio focalizado. Los métodos de Poe que estimulan la construcción de espacios imaginarios tanto como su deconstrucción serán analizados con los instrumentos que nos proporciona la neuropsicología.
K nigin Luise von Preu en als Nationalheldin
Speth, Rudolf
Zeitenblicke , 2004,
Abstract: Die nationale Ged chtnispolitik, die nach dem Tod K nigin Luises 1810 in Preu en einsetzte, weist einige Besonderheiten auf. Die tote K nigin wurde nicht mehr in Formen des monarchischen Totenkultes verehrt. Sie wurde zur Heldin in der Erz hlung von der nationalen Befreiung. Die intellektuellen Verfechter des Konzeptes der Volkserhebung sahen im frühen Tod der K nigin ein brauchbares Symbol für die Mobilisierung des Volkes. Der Luisenkult und die Opferrhetorik erreichten aber erst im Kaiserreich ihren H hepunkt. Erst dort wurde der Luisenkult zum festen Bestandteil des kulturellen Ged chtnisses. Luise wurde auch zur weiblichen Ikone der nationalen Bewegung. Die Stiftung des Luisenordens, das Luisenkreuz und die Popularisierung der Luisengeschichte in Volksbüchern trugen dazu bei, die Frauen in die Nation zu inkludieren. Der Luisenkult ist Teil eines politischen Mythos. Politische Mythen sind Narrationen und dienen der Identit tsstiftung und der Mobilisierung des politischen Verbandes. Ihre Wirkung entfalten sie durch Rituale und Reduktion der komplexen Wirklichkeit auf einfache Deutungs- und Handlungsmuster.
Ombudsmen in Higher Education: Helping the Single Student, Contributing to the Universities’ Institutional Changes  [PDF]
Josef Leidenfrost
Creative Education (CE) , 2013, DOI: 10.4236/ce.2013.47A2002
Abstract:

This article aims to firstly give a brief insight into the major challenges for modern time universities like necessary change management, growing competitiveness, increasing expectations by the stakeholders and how rising tuition fees affect all of that, and secondly on the growing pressure for universities on responding more effectively to a demanding student population, mounting expectations and diverse backgrounds of students, and thirdly how alternative dispute resolution is more and more commonly used as a means of resolving disputes and complaints informally and at an early stage in order to avoid litigation and the courts. It is described how ombudsmen in higher education can help to minimize the students’ feelings of disconnection created by formal and judicial processes and get fair treatment. Catering either for students only or for the whole university community, ombudsmen provide confidential, impartial complaints handling services and also contribute to change management on the macro level and hence help with changing policies.

Peri-Ocular Eye Patterning (POEP): More than Meets the Eye  [PDF]
Noam Josef
Open Journal of Animal Sciences (OJAS) , 2017, DOI: 10.4236/ojas.2017.73027
Abstract: Spatial body patterning is widely observed throughout the phylogenetic tree and is used for a variety of functions. Body colours in general and camouflaging patterns in particular have been extensively studied for their role in stealth and crypsis. Particular interest has focused on the diverse skin patterns surrounding animals’ eyes (Peri-Ocular Eye Patterning-POEP). These patterns have been suggested to aid in high brightness conditions, help camouflage an organism’s eyes or ornament and emphasize bright head colorations. In this work I demonstrate the apparent widespread use of POEP among various marine and terrestrial organisms (both vertebrates and invertebrates) and discuss the trait’s abundance, variations, and possible roles.
Impact of Noise Barriers on Air-Pollution Dispersion  [PDF]
Josef Brechler, Vladimir Fuka
Natural Science (NS) , 2014, DOI: 10.4236/ns.2014.66038
Abstract:

The impact of noise barriers on gaseous air-pollution dispersion was examined using the high-resolution CLMM (Charles University LES (Large Eddy Simulation) Microscale Model). The dispersion of a mixture of nitrogen oxides (denoted as NOx—a mix of NO and NO2) was computed, providing the simulation in which wind direction is approximately perpendicular to the noise barriers. The barriers were assumed to be straight and infinitely long, with a height of 3 m. Dispersion of NOx was modeled for situations with no noise barriers along the highway, barriers on both sides, and for a single barrier on the upwind and downwind sides of the highway. The modelling results are presented and discussed in relation to previous studies and the implications of the results are considered for pollution barriers along highways.

Complement Attack against Aspergillus and Corresponding Evasion Mechanisms
Cornelia Speth,Günter Rambach
Interdisciplinary Perspectives on Infectious Diseases , 2012, DOI: 10.1155/2012/463794
Abstract: Invasive aspergillosis shows a high mortality rate particularly in immunocompromised patients. Perpetually increasing numbers of affected patients highlight the importance of a clearer understanding of interactions between innate immunity and fungi. Innate immunity is considered to be the most significant host defence against invasive fungal infections. Complement represents a crucial part of this first line defence and comprises direct effects against invading pathogens as well as bridging functions to other parts of the immune network. However, despite the potency of complement to attack foreign pathogens, the prevalence of invasive fungal infections is increasing. Two possible reasons may explain that phenomenon: First, complement activation might be insufficient for an effective antifungal defence in risk patients (due to, e.g., low complement levels, poor recognition of fungal surface, or missing interplay with other immune elements in immunocompromised patients). On the other hand, fungi may have developed evasion strategies to avoid recognition and/or eradication by complement. In this review, we summarize the most important interactions between Aspergillus and the complement system. We describe the various ways of complement activation by Aspergillus and the antifungal effects of the system, and also show proven and probable mechanisms of Aspergillus for complement evasion. 1. Aspergillus Evokes Invasive Infections in Immunocompromised Individuals Aspergillus species are ascomycetes that are classified in the form subdivision Deuteromycotina, as many of them do not show a sexual reproductive phase [1]. Generally, they are common ubiquitous saprophytes in soil and on dead organic substrates. Being classic opportunistic pathogens, invasive infections by Aspergillus species almost exclusively develop in immunocompromised patients, while localized infections and allergic bronchopulmonary aspergillosis occur in individuals without immunosuppression. Generally, the species Aspergillus fumigatus represents the most common inducer of invasive and allergic manifestations, followed by A. terreus, A. flavus, and A. niger [1, 2]. Invasive aspergillosis (IA) considerably contributes to the morbidity and mortality among immunocompromised individuals, including patients with haematological malignancies, recipients of haematological stem cell and solid organ transplants, AIDS patients, and patients treated with immunosuppressive regimens due to autoimmune diseases [3]. The most important single risk factor is prolonged and profound neutropenia (<500
Exclusive high-$Q^2$ electroproduction: light-cone wave functions and electromagnetic form factors of mesons,
J. Speth,V. R. Zoller
Physics , 1995, DOI: 10.1016/0370-2693(95)00445-Q
Abstract: We apply the light-cone technique to electroproduction reaction $ep\to e\pi^+n$ long considered as a means of measuring the electromagnetic form factor of the pion. We show that the interpretation of the long-standing puzzle of large transverse cross section ($\sigma_T$) in terms of the $\gamma^*\rho\to \pi$ transition on the $\rho$ mesons in the light-cone proton is possible, but requires quite a slow decrease of the $F_{\rho\pi}(\q2)$ form factor. This interpretation can be tested in the related $ep\to e\pi^0p$ reaction. Corrections which are due to the final-state meson-baryon interactions (FSI) are evaluated and are shown to amount to a $25\%$ effect at moderately large $\q2$. Vanishing FSI with increasing $Q^2$ - the color transparency phenomenon - is shown to be very strong.
Capillary instability on a hydrophilic stripe
Raymond L. Speth,Eric Lauga
Physics , 2009, DOI: 10.1088/1367-2630/11/7/075024
Abstract: A recent experiment showed that cylindrical segments of water filling a hydrophilic stripe on an otherwise hydrophobic surface display a capillary instability when their volume is increased beyond the critical volume at which their apparent contact angle on the surface reaches ninety degrees (Gau et al., Science, 283, 1999). Surprisingly, the fluid segments did not break up into droplets -- as would be expected for a classical Rayleigh-Plateau instability -- but instead displayed a long-wavelength instability where all excess fluid gathered in a single bulge along each stripe. We consider here the dynamics of the flow instability associated with this setup. We perform a linear stability analysis of the capillary flow problem in the inviscid limit. We first confirm previous work showing that that all cylindrical segments are linearly unstable if (and only if) their apparent contact angle is larger than ninety degrees. We then demonstrate that the most unstable wavenumber for the surface perturbation decreases to zero as the apparent contact angle of the fluid on the surface approaches ninety degrees, allowing us to re-interpret the creation of bulges in the experiment as a zero-wavenumber capillary instability. A variation of the stability calculation is also considered for the case of a hydrophilic stripe located on a wedge-like geometry.
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