503 resultados para de Sitter relativity


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A series of monographs intended to supplement, and eventually to replace the author's book, "Modern electrical theory", which consists of XIV chapters. cf. [volume 1] pages [v].

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Mode of access: Internet.

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"The present discussion arose out of an article ['Continuity of thought and relativity of expression'] contributed by me to the Modern churchman for June 1915."--Pref., signed W. Sanday.

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Mode of access: Internet.

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Thèse - Univ. de Paris.

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Top Row: Cher Alaniz-Dowling, Katie Anibal, Tasneem Ba, Ethel Balaoing, Melissa Balok, Kristen Begin, Hillary bertke, Bess Bertolis, Lauren Blitz, roberta Bolio, Mariana Bordei, Christa Brock, Brianna Burg

Row 2: Kara Calhoun, Erin champieux, Sarah Marshall, Trevor Finton, Leovigildo Olivarez, Dena Fernandez, Daniel J. Tounsel, Emily Schmitt, Bridget Lufkin, Jessica Witt, Ryan VanLoocke, Quanda Chen, Vivian Cheng, Kelly Chiles

Row 3: Alicia Classens, Kristin coil, Michelle Crist, Jeremy Curtis, Shannon Dabao, Melanie Datu, Amanda Dean, Pina Desai, Theresa De Sitter, Kathryn DeWitt

Row 4: Elizabeth Dorda, Laura Dow, Jennifer Feighner, Elizabeth Findley, Katherine Fix, Lindsy Gasparovich, Michelle Gastman, Silvia Gonzafez, Cari Gray, Elizabeth Handzlik

Row 5: Lauren Hisey, Karen Hofmeister, Patricia M. Holda, Jennifer Hoskins, Emily Jacobson, Rita Jiddou, Elisabeth Jilek, Patrielle R. Johnson, Susanna Johnston, Kelly Kandt, Kelly Kazup, Sara Kile

Row 6: Lisa Kuzma, karen Kwapis, Tracey Lee, Patricia Coleman-Burns, Nola Pender, Carol Loveland-Cherry, Ada Sue Hinshaw, Beverly Jones, judith Lynch-Sauer, Jan L.Lee, Kimberly Little, Amber Manchester, Tracie Martinez

Row 7: Brenda K. Maynard, Molly McCormick, Christopher McWatters, Kirsten Meister, Dorota Meller, Kevin Michel, Emily Mulla, Geine Nolan, kelly Noyes, Brandi Otto, Alice Palmer, Tricia Pasaoa, Erika Pete, Rebekah Peterson, Menusa Petrovski

Row 8: Jacqueline pinson, Gretchen Pletz, Rachelle Ramos, Rochelle E. Ramos, Rebecca Roberts, Darice Rosario, Andrea Ryan, Clare Ryan, Jason schwartz, Andrea Sears, Sarah Skavnak, Elizabeth Slager, Sara Smith, Dana Sullivan

Row 9: Allison Sweet, Irie Thom, Charly R. Thomas, Michelle Thurman, Shamin Ullah, Kellie Vaidya, Cynthia Valerio, Erin Verkerke, Kristen Verska, Winderence Webb, Marisa Wheatley, Kristine Wiersma, Monique D. Williams, Katherine Willis, Jennifer Zelle

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Includes bibliographical references and index.

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Errata slip inserted.

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book 1. Introductory: The social problem and its history.--book 2. The existing distribution of wealth and work.--book 3. Property and inequality of wealth.--book 4. Special remedies.--Appendix: On the relativity of political economy.

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We propose an experiment in which the phonon excitation of ion(s) in a trap, with a trap frequency exponentially modulated at rate kappa, exhibits a thermal spectrum with an Unruh temperature given by k(B)T=h kappa. We discuss the similarities of this experiment to the response of detectors in a de Sitter universe and the usual Unruh effect for uniformly accelerated detectors. We demonstrate a new Unruh effect for detectors that respond to antinormally ordered moments using the ion's first blue sideband transition.

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I argue that two competing accounts of persistence, three and four dimensionalism, are in fact metaphysically equivalent. I begin by clearly defining three and four dimensionalism, and then I show that the two theories are inter-translatable and equally simple. Through consideration of a number of different cases where intuitions about persistence are contradictory, I then go on to show that both theories describe these cases in the same manner. Further consideration of some empirical issues arising from the theory of special relativity lead me to conclude that the two theories are equally explanatory, and thus finally that they are metaphysically equivalent.

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Standard factorial designs sometimes may be inadequate for experiments that aim to estimate a generalized linear model, for example, for describing a binary response in terms of several variables. A method is proposed for finding exact designs for such experiments that uses a criterion allowing for uncertainty in the link function, the linear predictor, or the model parameters, together with a design search. Designs are assessed and compared by simulation of the distribution of efficiencies relative to locally optimal designs over a space of possible models. Exact designs are investigated for two applications, and their advantages over factorial and central composite designs are demonstrated.

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Introductory courses covering modem physics sometimes introduce some elementary ideas from general relativity, though the idea of a geodesic is generally limited to shortest Euclidean length on a curved surface of two spatial dimensions rather than extremal aging in spacetime. It is shown that Epstein charts provide a simple geometric picture of geodesics in one space and one time dimension and that for a hypothetical uniform gravitational field, geodesics are straight lines on a planar diagram. This means that the properties of geodesics in a uniform field can be calculated with only a knowledge of elementary geometry and trigonometry, thus making the calculation of some basic results of general relativity accessible to students even in an algebra-based survey course on physics.

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In the absence of an external frame of reference-i.e., in background independent theories such as general relativity-physical degrees of freedom must describe relations between systems. Using a simple model, we investigate how such a relational quantum theory naturally arises by promoting reference systems to the status of dynamical entities. Our goal is twofold. First, we demonstrate using elementary quantum theory how any quantum mechanical experiment admits a purely relational description at a fundamental. Second, we describe how the original non-relational theory approximately emerges from the fully relational theory when reference systems become semi-classical. Our technique is motivated by a Bayesian approach to quantum mechanics, and relies on the noiseless subsystem method of quantum information science used to protect quantum states against undesired noise. The relational theory naturally predicts a fundamental decoherence mechanism, so an arrow of time emerges from a time-symmetric theory. Moreover, our model circumvents the problem of the collapse of the wave packet as the probability interpretation is only ever applied to diagonal density operators. Finally, the physical states of the relational theory can be described in terms of spin networks introduced by Penrose as a combinatorial description of geometry, and widely studied in the loop formulation of quantum gravity. Thus, our simple bottom-up approach (starting from the semiclassical limit to derive the fully relational quantum theory) may offer interesting insights on the low energy limit of quantum gravity.

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This study unites investigations into the linguistic relativity of color categories with research on children's category acquisition. Naming, comprehension, and memory for colors were tracked in 2 populations over a 3-year period. Children from a seminomadic equatorial African culture, whose language contains 5 color terms, were compared with a group of English children. Despite differences in visual environment, language, and education, they showed similar patterns of term acquisition. Both groups acquired color vocabulary slowly and with great individual variation. Those knowing no color terms made recognition errors based on perceptual distance, and the influence of naming on memory increased with age. An initial perceptually driven color continuum appears to be progressively organized into sets appropriate to each culture and language. PsycINFO Database Record (c) 2009 APA, all rights reserved