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Oral History Interview with Dalilah Rodriguez (sound recording)
No full textOral history interview of Dalilah Rodriguez conducted by TAMU-CC student Theresa Valli. Dalilah talks about her and her family's experience during Hurricane Harvey and its aftermath
Oral History Interview with Dalilah Rodriguez (sound recording)
No full textOral history interview of Dalilah Rodriguez conducted by TAMU-CC student Theresa Valli. Dalilah talks about her and her family's experience during Hurricane Harvey and its aftermath
The construction of Karen Karnak: The multi-author-function
No full textThis thesis is situated within the comparatively recent developments of Web 2.0 and the emergence of interactive WikiMedia, and explores the mode of authorship within a Read/Write culture compared to that of a Read/Only tradition. The hypothesis of this study is that the role of the audience has become merged with the author, and as such, represents new functions and attributes, distinct from a more conventional concept of authorship, in which the roles of audience and author are more separate. Read/Write and participatory culture, as defined by this study, is focused on collaboration, and includes the influences of D.I.Y. culture, Open-Source practices and the production of text by multiple authors. Multi-authorship presents a re-thinking of several concepts which support the notion of the individual author, since the focus of multi-authorship is not on attribution and ownership of a finished text, but on the continued malleability of a text. Modes of multi-authorship, demonstrated in the use of the pseudonyms Alan Smithee and Karen Eliot, represent declarative authors whose names signify multiple origins, whilst concurrently indicating a distinct body of work. The function of these names form an important context to this study, since primary research involves the construction of an experimental mode of multi-authorship utilising WikiMedia technology and the interaction of thirty nine participants, who are invited to create a body of work under the collective pseudonym Karen Karnak. The data generated by this experiment is analysed using aspects of Michel Foucault's author-function to identify and determine power structures inherent in the WikiMedia context. The interplay of power structures, including concepts such as identity, ownership and the body of work, affect the resulting mode of authorship and contribute to the construction of Karen Karnak, suggesting further areas of research into the emerging multi-author
Improving interoperability in distributed and physical union catalogues through co-ordination of cataloguing and indexing policies : report for work package B of the JISC CC-interop project
No full textThis report addresses section 7.2.4 (Guidelines and Strategy for Cataloguing and Indexing Standards) of the CC-interop project plan and fulfills deliverable B3 of work
package B
jDHBenelux Author Template
No full textThis repository contains the latest official GitHub hosted versions of the LaTeX template that authors are required to use when they finalize their contribtions to the DH Benelux Journal. The repository synchronises with the corresponding easy-to-use and well-documented Overleaf Template that provides authors with a low threshold environment for writing LaTeX – but can be used with any LaTeX compiler.
About this Release: Apart from some minor changes to the .cls, v2.0 introduces a number of new files to improve open source development with git and GitHub, including a README, a CC-BY 4.0 License, and a .gitignore file. It also prepares the repository for synchronisation with Zenodo, to improve sustainability.
Full Changelog: https://github.com/DHBenelux/jDHBenelux-author-template/compare/v1.1...v2.
Conversores utilizando células de comutação de quatro estados
No full textTese (doutorado) - Universidade Federal de Santa Catarina, Centro Tecnológico. Programa de Pós-Graduação em Engenharia Elétrica.O presente trabalho versa sobre conversores estáticos baseados em uma célula de comutação de quatro estados. Esta célula é formada por três interruptores, três diodos e um transformador trifásico conectado em . O comando dos interruptores é defasado em 120 , fazendo com que os conversores baseados nesta célula tenham três regiões de operação dadas em função da razão cíclica. A partir da célula de comutação proposta foram gerados os seis conversores CC-CC básicos e conversores CC-CA meia-ponte e ponte completa. Os conversores CC-CC buck, boost e buck-boost foram analisados em todas as regiões de operação, tanto no modo de condução contínuo, quanto no descontínuo. Para estas situações, foram mostradas as etapas de operação, as principais formas de onda, o ganho estático, a característica de saída, as ondulações e os filtros de entrada e saída, e ainda resultados experimentais e/ou de simulação. Foram estudados conversores CC-CA meia-ponte baseados nas células de comutação de três e quatro estados. Para os dois casos, realizou-se a análise teórica para o modo de condução contínuo, o estudo da modulação PWM senoidal e do filtro empregado, bem como se implementou as estruturas. O conversor CC-CA meia-ponte apresenta tensão de saída de três níveis quando se utiliza a célula de três estados e, de quatro níveis quando se utiliza a célula de quatro estados. Como características gerais dos conversores baseados na célula de comutação de quatro estados pode-se destacar que a freqüência nos elementos dos filtros é três vezes maior que a freqüência de comutação, e que a tensão e/ou a corrente sobre estes elementos é um terço da que estariam submetidos nos conversores clássicos. Desse modo, ao utilizar a célula de comutação de quatro estados obtém-se uma significativa redução dos filtros, reduzindo peso e volume, além de possibilitar a melhora da resposta dinâmica
Scalar soliton quantization with generic moduli
No full textThis article is distributed under the terms of the Creative Commons
Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in
any medium, provided the original author(s) and source are credArticle funded by SCOAP3. CP is
a Royal Society Research Fellow and partly supported by the U.S. Department of Energy
under grants DOE-SC0010008, DOE-ARRA-SC0003883 and DOE-DE-SC0007897. ABR
is supported by the Mitchell Family Foundation. We would like to thank the Mitchell
Institute at Texas A&M and the NHETC at Rutgers University respectively for hospitality
during the course of this work. We would also like to acknowledge the Aspen Center
for Physics and NSF grant 1066293 for a stimulating research environment which led to
questions addressed in this paper
A non-relativistic model for the [cc][cc] tetraquark
No full textWe use a non-relativistic model to study the spectroscopy of a tetraquark composed of [cc][cc] in a diquark-antidiquark configuration. By numerically solving the Schrodinger equation with a Cornell-inspired potential, we separate the four-body problem into three two-body problems. Spin-dependent terms (spin-spin, spin-orbit and tensor) are used to describe the splitting structure of the cc spectrum and are also extended to the interaction between diquarks. Recent experimental data on charmonium states are used to fix the parameters of the model and a satisfactory description of the spectrum is obtained. We find that the spin-dependent interaction is sizable in the diquark-antidiquark system, despite the heavy diquark mass, and also that the diquark has a finite size if treated in the same way as the cc systems. We find that the lowest S-wave T4c tetraquarks might be below their thresholds of spontaneous dissociation into low-lying charmonium pairs, while orbital and radial excitations would be mostly above the corresponding charmonium pair thresholds. Finally, we repeat the calculations without the confining part of the potential and obtain bound diquarks and bound tetraquarks. This might be relevant to the study of exotic charmonium in the quark-gluon plasma. The T 4c states could be investigated in the forthcoming experiments at the LHC and Belle II.The authors acknowledge the support received from the brazilian funding agencies FAPESP (contract 12/50984-4), CNPq and CAPES. V. R. Debastiani also acknowledges the support from Generalitat Valenciana in the Program Santiago Grisolia (Exp. GRISOLIA/2015/005
Conversor flyback modular conectado em série na entrada e série na saída operando no modo descontínuo com pulso único de comando
No full textDissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico, Programa de Pós-Graduação em Engenharia Elétrica, Florianópolis, 2014Este trabalho apresenta uma nova estrutura de conversor CC-CC unidirecional, modular, adequado às aplicações em alta tensão e alta potência. Esta nova estrutura é gerada por meio da associação de conversores Flyback em modo descontínuo. As principais características do conversor proposto são: esforços de tensão reduzidos nos componentes, construção com base em um conversor já consolidado, isolação em alta frequência. A metodologia de projeto é apresentada envolvendo a parte de eletrônica de potência e também o controle do conversor. Para validar a parte teórica um protótipo de 3 kW com tensão de entrada de 600 V foi construído e avaliado experimentalmente. Os resultados experimentais confirmam o funcionamento do conversor, evidenciando as suas características e vantagens.Abstract: This paper presents a new structure of unidirectional converter, DC-DC modular, suitable for applications in high voltage and high power. This new structure is generated by associating Flyback converters in discontinuous mode. The main characteristics of the proposed converter are reduced voltage stress on the components, construction based on an established converter and high frequency isolation. The desing methodology is presented involving the part of the power electronics and also the converter control. For validating the theory, a prototype of 3 kW with 600 V input voltage was constructed and experimentally evalvated. The experimental results confirm the operation of the converter, highlighting their features and advantages
Search for the doubly charmed baryon Xi+cc
No full textA search for the doubly charmed baryon Ξ+
cc in the decay mode Ξ+
cc→ Λ
+
c K−π
+
is performed with a data sample, corresponding to an integrated luminosity of 0.65 fb−1
, of
pp collisions recorded at a centre-of-mass energy of 7 TeV. No significant signal is found in
the mass range 3300–3800 MeV/c2
. Upper limits at the 95% confidence level on the ratio of
the Ξ+
cc production cross-section times branching fraction to that of the Λ
+
c
, R, are given as
a function of the Ξ+
cc mass and lifetime. The largest upper limits range from R < 1.5×10−2
for a lifetime of 100 fs to R < 3.9 × 10−4
for a lifetime of 400 fs
- …
