Electrostatics of surface-electrode ion traps

Surface-electrode (SE) rf traps are a promising approach to manufacturing complex ion-trap networks suitable for large-scale quantum information processing. In this paper we present analytical methods for modeling SE traps in the gapless plane approximation, and apply these methods to two particular classes of SE traps. For the SE ring trap we derive analytical expressions for the trap geometry and strength, and also calculate the depth in the absence of control fields. For translationally symmetric multipole configurations (analogs of the linear Paul trap), we derive analytical expressions for electrode geometry and strength. Further, we provide arbitrarily good approximations of the trap depth in the absence of static fields and identify the requirements for obtaining maximal depth. Lastly, we show that the depth of SE multipoles can be greatly influenced by control fields.Comment: Published version. Sec. III significantly changed. Some minor edits throughou

Comparison of model predictions and speed trial results for a group of 32' wooden trawlers

Speed trial results of six 32' wooden stern, trawlers built to the same design are analyzed to determine the EHP ship Froude number curves in each case and are compared with the model test results of the same design and for the corresponding, displacement, conditions

Partial Identification of Probability Distributions with Misclassified Data

This paper addresses the problem of data errors in discrete variables. When data errors occur, the observed variable is a misclassified version of the variable of interest, whose distribution is not identified. Inferential problems caused by data errors have been conceptualized through convolution and mixture models. This paper introduces the direct misclassification approach. The approach is based on the observation that in the presence of classification errors, the relation between the distribution of the "true" but unobservable variable and its misclassified representation is given by a linear system of simultaneous equations, in which the coefficient matrix is the matrix of misclassification probabilities. Formalizing the problem in these terms allows one to incorporate any prior information--e.g., validation studies, economic theory, social and cognitive psychology--into the analysis through sets of restrictions on the matrix of misclassification probabilities. Such information can have strong identifying power; the direct misclassification approach fully exploits it to derive identification regions for any real functional of the distribution of interest. A method for estimating the identification regions and construct their confidence sets is given, and illustrated with an empirical analysis of the distribution of pension plan types using data from the Health and Retirement Study.

As bibliotecas escolares no contexto da avaliação das escolas

Num contexto em que a Biblioteca Escolar se tem vindo a afirmar em Portugal pela importância da sua ação no processo de aprendizagem e na construção de conhecimento, é fundamental que as escolas e os agentes externos reconheçam esse papel para se poder potenciar a sua função pedagógica. Esta questão passa, nomeadamente, por dar visibilidade ao trabalho desenvolvido pelas bibliotecas escolares. E essa visibilidade materializa-se, entre outros aspetos, pela sua inclusão nos relatórios de avaliação interna e externa das escolas. Neste sentido, desenvolveu-se um estudo centrado na análise dos relatórios da Inspeção Geral da Educação e Ciência (região do Algarve), referentes ao processo de avaliação externa das escolas no período de 2006/2007 a 2011/2012. Trata-se de um estudo de caráter documental onde se procurou identificar as menções que eram feitas às bibliotecas escolares e a natureza dessas mesmas referências, ou seja, como é que os relatórios de avaliação externa espelham essa estrutura de apoio pedagógico. Da análise efetuada, constatou-se que todos os relatórios fazem referência à biblioteca escolar, no entanto as categorias menos representadas são as que remetem para o papel pedagógico da biblioteca

Absence of Size Dependence of the Kondo Resistivity

We have measured the low temperature resistivity of AuFe wires in the dilute magnetic impurity limit as a function of wire width, temperature, and magnetic field. When the width dependence of the electron-electron interaction contribution to the resistivity is taken into account, the temperature dependence of the remaining Kondo contribution to the resistivity of all samples with the same impurity concentration is identical. Similar behavior is observed for the magnetic field dependent resistivity. Thus, the Kondo contribution to the resistivity is independent of width down to 38 nm, much smaller than the Kondo length ξK=ħvF/kBTK≊10 μm

O futuro da cadeia produtiva da carne bovina brasileira: uma visão para 2040.

bitstream/item/216312/1/02-Relato769rio-O-Futuro-da-Cadeia-Produtiva-da-Carne-Bovina-FINAL-logos.pdfGuilherme Cunha Malafaia (Coordenador Geral

Shelby L. Brewer v. Board of Review of the Industrial Commission of Utah, Department of Employment Security : Brief of Respondent

Petition for Writ of Certiorari for Review of a Decision issued by the Utah Court of Appeals Affirming a Decision of the Board of Review of the Industrial Commission, Unemployment Insurance Division State of Uta