Blood vessels and nerves of the face in rodents with and without cheek pouches

Thesis (M.A.)--Boston University, 1947. This item was digitized by the Internet Archive

Letter from Frank R. Arnold

Letter concerning a position in the modern languages department at Utah Agricultural College

MANAGEMENT DECISION MAKING IN MARKETING

Miniaturized microreactors enable photochemistry with laser irradiation in flow mode to convert azidobiphenyl into carbazole with high efficiency

Replacing Neural Networks by Optimal Analytical Predictors for the Detection of Phase Transitions

Identifying phase transitions and classifying phases of matter is central to understanding the properties and behavior of a broad range of material systems. In recent years, machine-learning (ML) techniques have been successfully applied to perform such tasks in a data-driven manner. However, the success of this approach notwithstanding, we still lack a clear understanding of ML methods for detecting phase transitions, particularly of those that utilize neural networks (NNs). In this work, we derive analytical expressions for the optimal output of three widely used NN-based methods for detecting phase transitions. These optimal predictions correspond to the results obtained in the limit of high model capacity. Therefore, in practice, they can, for example, be recovered using sufficiently large, well-trained NNs. The inner workings of the considered methods are revealed through the explicit dependence of the optimal output on the input data. By evaluating the analytical expressions, we can identify phase transitions directly from experimentally accessible data without training NNs, which makes this procedure favorable in terms of computation time. Our theoretical results are supported by extensive numerical simulations covering, e.g., topological, quantum, and many-body localization phase transitions. We expect similar analyses to provide a deeper understanding of other classification tasks in condensed matter physics

Variation in pH, volatile fatty acid concentration and proportions of the individual acids within the rumen of the dairy cow : a thesis ... M. Agr. Sc.

An increased interest in rumen physiology and metabolism has resulted in the accumulation of a mass of data on the subject over the last two decades but information, particularly on quantitative aspects, is far from complete. It is now well established that the main non-nitrogenous end- products of rumen fermentation, the volatile fatty acids (VFA) acetic, propionic and butyric play a major part in the energy metabolism of the ruminant. They provide the major energy source for the animal and the amounts and proportions of the acids absorbed influence the efficiency with which the diet is used for fattening and can affect the milk composition of the lactating cow. Thus a knowledge of the type of fermentation produced is necessary, as a contribution to the assessment of the nutritive value of feedstuffs and the efficiency with which they are converted to animal products. The results obtained by different investigators are seldom strictly comparable as the pattern of rumen fermentation and the concentration and proportions of the VFA s may be considerably modified by factors other than the composition of the diet. Such factors are the level of intake, the feeding regime and sampling techniques adopted. [From Introduction

Customization and/or Social Shopping: How do Digital Millennials Shop Online?

This paper investigates how Social Shopping and Customization interplay to affect Digital Millennials’ online shopping experience. We test whether the social richness of online shopping in pairs can overcome the leanness of the online shopping experience. Can the interactivity of Online Customization accomplish the same purpose? Is there a synergistic, interaction effect? Our 2x2 experimental design with 182 subjects examines this question with customizable versus packaged vacation travel. Analyses of Perceived Effectiveness, Perceived Ease of Use, Perceived Enjoyment and Intent to Purchase suggest that a user’s Intention to Purchase is linked to the suitability of the site’s user interface as well as the perceived social / technological richness of the website. The results shed light on Digital Millennials’ online shopping preferences and provide guidance to web site designers incorporating Social Shopping or Customization into online shopping applications. Future research will extend the results to other populations, task domains and devices

Color-octet scalar effects on Higgs boson production in gluon fusion

We compute the next-to-next-to-leading order QCD corrections to the gluon-fusion production of a Higgs boson in models with massive color-octet scalars in the ${\bf (8,1)_0}$ representation using an effective-theory approach. We derive a compact analytic expression for the relevant Wilson coefficient, and explain an interesting technical aspect of the calculation that requires inclusion of the quartic-scalar interactions at next-to-next-to-leading order. We perform a renormalization-group analysis of the scalar couplings to derive the allowed regions of parameter space, and present phenomenological results for both the Tevatron and the LHC. The modifications of the Higgs production cross section are large at both colliders, and can increase the Standard Model rate by more than a factor of two in allowed regions of parameter space. We estimate that stringent constraints on the color-octet scalar parameters can be obtained using the Tevatron exclusion limit on Higgs production.Comment: 18 pages, 6 figures, 3 table

Web Site Promotion

Der Erfolg einer Marktpräsenz eines Unternehmens im Internet, ist originär von dem Bekanntheitsgrad seiner Web-Adresse abhängig. Das vorliegende Arbeitspapier untersucht die Mög-lichkeiten zur Bekanntmachung der Web-Präsenz eines Unternehmens im elektronischen Markt. Im Unterschied zum Online-Marketing, das sich vorwiegend mit der Vermarktung von Produkten oder Dienstleistungen eines Unternehmens im eMarkt \u27Internet\u27 befaßt, steht bei der Web Site Promotion (WSP) im Vordergrund, die Web-Präsenz eines Unternehmens im elektronischen Markt zu exponieren. Web Site Promotion muß somit einem Online-Marketing vorgelagert und begleitend praktiziert werden. Ziel des vorliegenden Arbeitspapiers ist die Entwicklung eines konsistenten Konzeptes zur Web Site Promotion, das zu einer systematischen Erschließung des eMarktes für ein Unter-nehmen beiträgt. Zunächst wird die Web Site Promotion in einem eBusiness-Modell positioniert. Darauf aufbauend wird die Notwendigkeit einer Web Site Promotion praxisorientiert mit ihrem Marketinghintergrund dargelegt. Für die Realisierung einer systematischen Web Site Promotion bieten sich drei Wege. Web Site Promotion kann innerhalb des Mediums Internet betrieben werden. Hierzu werden die Möglichkeiten in den Bereichen World Wide Web (WWW), Electronic Mail (eMail), Newsgroups und sonstige Online-Medien detailliert aufgezeigt. Für die Web Site Promotion außerhalb des Mediums Internet werden die drei Bereiche Printmedien, herkömmliche elektronische Medien und sonstige Offline-Medien untergliedert und vorgestellt. Als dritter Weg bietet sich ein kombinierter Kommunikations-Mix an