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Search Results: 1 - 10 of 4570 matches for " Marvin Schneider "
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Mechanized Cultural Reasoning as a Tool to Assess Trust in Virtual Enterprises
Jacques Calmet,,Pierre Maret,Marvin Schneider
International Journal of Computer Science & Applications , 2010,
Abstract:
A law of nature?  [PDF]
Marvin Chester
Open Journal of Ecology (OJE) , 2011, DOI: 10.4236/oje.2011.13011
Abstract: Is there an overriding principle of nature, hitherto overlooked, that governs all population behavior? A single principle that drives all the regimes observed in nature exponential-like growth, saturated growth, population decline, population extinction, oscillatory behavior? In current orthodox population theory, this diverse range of population behaviors is described by many different equations each with its own specific justification. The signature of an overriding principle would be a differential equation which, in a single statement, embraces all the panoply of regimes. A candidate such governing equation is proposed. The principle from which the equation is derived is this: The effect on the environment of a population’s success is to alter that environment in a way that opposes the success.
Neuronal Basis of Innate Olfactory Attraction to Ethanol in Drosophila
Andrea Schneider, Manuela Ruppert, Oliver Hendrich, Thomas Giang, Maite Ogueta, Stefanie Hampel, Marvin Vollbach, Ansgar Büschges, Henrike Scholz
PLOS ONE , 2012, DOI: 10.1371/journal.pone.0052007
Abstract: The decision to move towards a mating partner or a food source is essential for life. The mechanisms underlying these behaviors are not well understood. Here, we investigated the role of octopamine – the invertebrate analogue of noradrenaline – in innate olfactory attraction to ethanol. We confirmed that preference is caused via an olfactory stimulus by dissecting the function of the olfactory co-receptor Orco (formally known as OR83b). Orco function is not required for ethanol recognition per se, however it plays a role in context dependent recognition of ethanol. Odor-evoked ethanol preference requires the function of Tbh (Tyramine β hydroxalyse), the rate-limiting enzyme of octopamine synthesis. In addition, neuronal activity in a subset of octopaminergic neurons is necessary for olfactory ethanol preference. Notably, a specific neuronal activation pattern of tyraminergic/octopaminergic neurons elicit preference and is therefore sufficient to induce preference. In contrast, dopamine dependent increase in locomotor activity is not sufficient for olfactory ethanol preference. Consistent with the role of noradrenaline in mammalian drug induced rewards, we provide evidence that in adult Drosophila the octopaminergic neurotransmitter functions as a reinforcer and that the molecular dissection of the innate attraction to ethanol uncovers the basic properties of a response selection system.
Influence of “Mild” Sonication Conditions on the Characteristics of Streptococcus thermophilus ST-M5  [PDF]
Marvin Moncada, Kayanush J. Aryana
Advances in Microbiology (AiM) , 2012, DOI: 10.4236/aim.2012.21002
Abstract: Mild sonication intensity is an acoustic energy which involves the conversion of electrical signal into a physical vibration modifying the permeability of the cell plasma membrane. The objective of this study was to determine the effect of mild sonication intensities at different temperatures on growth, bile tolerance and protease activity of Streptococcus thermophilus. The treatments were four mild sonication intensities (8.07, 14.68, 19.83 and 23.55 W/cm2) randomized at three different temperatures (4°C, 22°C and 40°C). The energy input (1500 J) was kept constant in all treatments. Control samples did not receive any sonication treatment. Growth and bile tolerance were determined every two hours for 12 h of incubation. Protease activity was determined at 0, 12 and 24 h. Mild sonication conditions included a) mild sonication intensities, b) temperatures and c) times, all three of which played a role in influencing the desirable attributes of Streptococcus salivarius ssp. thermophilus ST-M5. Of all the mild sonication intensities studied, 14.68 W/cm2 had the best overall influence at certain time points for improving bile tolerance and growth at 4°C, growth at 22°C and bile tolerance and growth at 40°C of Streptococcus salivarius ssp. thermophilus ST-M5. Mild sonication intensity of 23.55 W/cm2 had the overall best influence at certain time points for protease activity of Streptococcus salivarius ssp. thermophilus ST-M5 at 40°C. Streptococcus thermophilus ST-M5 pretreatment with some mild sonication conditions can be recommended for improvement of some of its characteristics.
Introduction: Validation methods for function genome annotation
Stodolsky Marvin
BMC Genomics , 2011, DOI: 10.1186/1471-2164-12-s1-i1
Abstract:
The Inter-twining of Modern Performance Studies and Current Trends in Anthropology
Marvin Carlson
Revista Brasileira de Estudos da Presen?a , 2011,
Abstract: This paper discusses the relation between Performance, Theatre and Anthropology. We present the origins of the relations between performance and anthropology, listing the main ideas from North-American and French pioneers. We compare the connections between artists and anthropologists like Richard Schechner and Victor Turner, Eugenio Barba and Kirsten Hastrup. Finally, we discuss the movements and the different apprehensions of performance and the productive way in which the relation between performance and anthropology has been built in recent years.
Localidad y globalización en la dinámica migratoria hacia los Estados Unidos desde áreas urbano - marginales y rurales: el caso de los municipios de El Progreso y El Negrito en el departamento de Yoro, Honduras
Marvin Barahona
Encuentro , 2008,
Abstract: ESTE INFORME SE ENFOCA EN EL FENóMENO MIGRATORIO HACIA LOS Estados Unidos desde los municipios de El Progreso y El Negrito, en el departamento hondure o de Yoro. Destaca las tendencias y consecuencias principales de dicho fenómeno, los sectores de población a los cuales afecta y las características significativas del contexto social, económico y político en el que éste se produce. Se exploran algunos datos relevantes contenidos en la base de datos –en proceso de construcción– del Equipo de Reflexión, Investigación y Comunicación de la Compa ía de Jesús en Honduras (ERIC-SJ).
Strange Bedfellows: Quantum Mechanics and Data Mining
Marvin Weinstein
Physics , 2009, DOI: 10.1016/j.nuclphysbps.2010.02.009
Abstract: Last year, in 2008, I gave a talk titled {\it Quantum Calisthenics}. This year I am going to tell you about how the work I described then has spun off into a most unlikely direction. What I am going to talk about is how one maps the problem of finding clusters in a given data set into a problem in quantum mechanics. I will then use the tricks I described to let quantum evolution lets the clusters come together on their own.
Quantum Calisthenics: Gaussians, The Path Integral and Guided Numerical Approximations
Marvin Weinstein
Physics , 2009,
Abstract: It is apparent to anyone who thinks about it that, to a large degree, the basic concepts of Newtonian physics are quite intuitive, but quantum mechanics is not. My purpose in this talk is to introduce you to a new, much more intuitive way to understand how quantum mechanics works. I refer to this method as a guided numerical approximation scheme and it is based upon a new look at what the path integral tells us about states in Hilbert space. I begin with simple exactly solvable models and show how to handle problems which cannot be dealt with analytically, this includes the treatment of the evolution of a Gaussian wave-packet in an anharmonic potential as well tunneling problems (i.e., instanton effects)
Probing the CORE of the Haldane Conjecture
Marvin Weinstein
Physics , 1997, DOI: 10.1016/S0920-5632(97)00864-5
Abstract: The COntractor REnormalization group method (CORE), originally developed for application to lattice gauge theories, is very well adapted the study of spin systems and systems with fermions. As an warmup exercise for studying Hubbard models this method is applied to spin-1/2 and spin-1 anti-ferromagnets in one space dimension in order to see if it is able to explain the physics of the Haldane conjecture. The method not only provides support for Haldane's conjecture but provides insight into the physics of a more general class of spin-1 systems with Hamiltonians of the form $H= \sum_j \vec{s}(j)\cdot\vec{s}(j+1) - \beta (\vec{s}(j)\cdot\vec{s}(j+1))^2$ about which, until now, little was known.
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