cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Holographic repulsion and confinement in gauge theory
Creators: name: Husain, Viqar
name: Kothawala, Dawood
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We show that for asymptotically anti-deSitter backgrounds with negative energy, such as the AdS soliton and regulated negative mass AdS-Schwarzshild metrics, the Wilson loop expectation value in the AdS/CFT conjecture exhibits a Coulomb to confinement transition. We also show that the quark-antiquark ($q \bar q$) potential can be interpreted as affine time along null geodesics on the minimal string world sheet,and that its intrinsic curvature provides a signature of transition to confinement phase. The result demonstrates a UV/IR relation in that the boundary separation of the $q \bar{q}$ pair exhibits an inverse relationship with the radial descent of the world sheet into the bulk. Our results suggest a generic (holographic) relationship between confinement in gauge theory and repulsive gravity, which in turn is connected with singularity avoidance in quantum gravity.
description: 8 pages, 4 figures
Masala - Newsletter Virtuelle Fachbibliothek
Creators: name: Merkel-Hilf, Nicole
Publisher: name: Masala: Newsletter Virtuelle Fachbibliothek Südasien
Year: 2015

description: Masala: Newsletter Virtuelle Fachbibliothek Südasien, Bd. 7 Nr. 3 (2012)
Masala - Newsletter Virtuelle Fachbibliothek
Creators: name: Merkel-Hilf, Nicole
Publisher: name: Masala: Newsletter Virtuelle Fachbibliothek Südasien
Year: 2015

description: Masala: Newsletter Virtuelle Fachbibliothek Südasien, Bd. 7 Nr. 1 (2012)
The Volumetric Properties for Selected Impurities in Dense CO2 Destined for Re-Injection
Creators: name: Commodore, Albert Jerry
Publisher: name: Graduate Studies
Year: 2017
Subjects: subject: Chemistry--Physical
subject: Volumetric properties
subject: Dense CO2
subject: Selected Impurities
subject: Re-injection

description: Acid gas re-injection and carbon capture and storage are two technologies now implemented for reducing the industrial emission of CO2 and management of produced CO2. In both cases, impurities such as H2O, H2S, COS, O2, and SO2 can find a way into a CO2 injectate stream. These impurities can impact the thermophysical properties and chemical equilibria within the fluid stream. In this work, the volumetric influence of H2S, COS, CS2, SO2, and O2 impurities in a dense CO2 phase were studied through high-precision density measurements. The densities were used in calculating the apparent molar volumes. These molar volumes were subsequently used in calibrating the mixing coefficients for reference Helmholtz Energy Equations of State and Fluctuation Solution Theory models. The optimized mixing parameters were validated by comparison to existing density measurements and/or bubble / dew point data. Finally, the mixing coefficients were utilized in a Gibbs Energy Minimization routine to optimize the enthalpy of formation for COS and to calculate the equilibrium quotients. These routines will be expanded in the future to explore high-pressure processes.
Comunicação Museológica: o design como processo na construção de um modelo sustentável
Creators: name: Abreu, João Gomes De
Publisher: name: SOPCOM: Associação Portuguesa de Ciências da Comunicação
Year: 2013

description: No recenseamento realizado no Inquérito aos Museus em Portugal durante 1999 (OAC 2000) foram registados para análise 530 museus. Em 2005 a Base de Dados “Museus” (OAC 2005) já contava com um universo de 618 museus a inquirir pelo INE. No início de 2010, no decorrer do presente estudo, estavam registados 849 museus para análise. O crescimento do número de museus em Portugal na primeira década do milénio é notável e sintomática de uma grande dinâmica que se vive no sector. Contudo, esta evolução é antagónica quando confrontada com as dificuldades de sustentabilidade de muitos dos projetos museológicos portugueses, que não possuem os recursos mínimos necessários para o desenvolvimento da sua missão, por vezes reduzidos a simples coleções visitáveis por impossibilidade de desenvolver uma programação e comunicação regular com os seus públicos. (...)
description: SOPCOM: Associação Portuguesa de Ciências da Comunicação, 2013: 8º SOPCOM: "Comunicação Global, Cultura e Tecnologia"
Kummer Theory for Drinfeld Modules
Creators: name: Pink, Richard
Publisher: name: arXiv
Year: 2012
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 11G09 (11R58)

description: Let ϕ be a Drinfeld A-module of characteristic p0 over a finitely generated field K. Previous articles determined the image of the absolute Galois group of K up to commensurability in its action on all prime-to-p0 torsion points of ϕ, or equivalently, on the prime-to-p0 adelic Tate module of ϕ. In this article we consider in addition a finitely generated torsion free A-submodule M of K for the action of A through ϕ. We determine the image of the absolute Galois group of K up to commensurability in its action on the prime-to-p0 division hull of M, or equivalently, on the extended prime-to-p0 adelic Tate module associated to ϕ and M.
The electronic-structure origin of the anisotropic thermopower of nanolaminated Ti3SiC2 determined by polarized x-ray spectroscopy and Seebeck measurements
Creators: name: Magnuson, Martin
name: Mattesini, Maurizio
name: Van Nong, Ngo
name: Eklund, Per
name: Hultman, Lars
Publisher: name: arXiv
Year: 2012
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: Nanolaminated materials exhibit characteristic magnetic, mechanical, and thermoelectric properties, with large contemporary scientific and technological interest. Here, we report on the anisotropic Seebeck coefficient in nanolaminated Ti3SiC2 single-crystal thin films and trace the origin to anisotropies in element-specific electronic states. In bulk polycrystalline form, Ti3SiC2 has a virtually zero Seebeck coefficient over a wide temperature range. In contrast, we find that the in-plane (basal ab) Seebeck coefficient of Ti3SiC2, measured on single-crystal films has a substantial and positive value of 4-6 muV/K. Employing a combination of polarized angle-dependent x-ray spectroscopy and density functional theory we directly show electronic structure anisotropy in inherently nanolaminated Ti3SiC2 single-crystal thin films as a model system. The density of Ti 3d and C 2p states at the Fermi level in the basal ab-plane is about 40 % higher than along the c-axis. The Seebeck coefficient is related to electron and hole-like bands close to the Fermi level but in contrast to ground state density functional theory modeling, the electronic structure is also influenced by phonons that need to be taken into account. Positive contribution to the Seebeck coefficient of the element-specific electronic occupations in the basal plane is compensated by 73 % enhanced Si 3d electronic states across the laminate plane that give rise to a negative Seebeck coefficient in that direction. Strong phonon vibration modes with three to four times higher frequency along the c-axis than along the basal ab-plane also influence the electronic population and the measured spectra by the asymmetric average displacements of the Si atoms. These results constitute experimental evidence explaining why the average Seebeck coefficient of Ti3SiC2 in polycrystals is negligible over a wide temperature range.
description: 13 pages, 6 figures; http://prb.aps.org/abstract/PRB/v85/i19/e195134
Masala - Newsletter Virtuelle Fachbibliothek
Creators: name: Merkel-Hilf, Nicole
Publisher: name: Masala: Newsletter Virtuelle Fachbibliothek Südasien
Year: 2015

description: Masala: Newsletter Virtuelle Fachbibliothek Südasien, Bd. 7 Nr. 2 (2012)
Dynamics of zonal flow-like structures in the edge of the TJ-II stellarator
Creators: name: Alonso, J. A.
name: Velasco, J. L.
name: Arévalo, J.
name: Hidalgo, C.
name: Pedrosa, M. A.
name: Van Milligen, B. Ph.
name: Carralero, D.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: The dynamics of fluctuating electric field structures in the edge of the TJ-II stellarator, that display zonal flow-like traits, is studied. These structures have been shown to be global and affect particle transport dynamically [J.A. Alonso et al., Nucl. Fus. 52 063010 (2012)]. In this article we discuss possible drive (Reynolds stress) and damping (Neoclassical viscosity, geodesic transfer) mechanisms for the associated ExB velocity. We show that: (a) while the observed turbulence-driven forces can provide the necessary perpendicular acceleration, a causal relation could not be firmly established, possibly because of the locality of the Reynolds stress measurements, (b) the calculated neoclassical viscosity and damping times are comparable to the observed zonal flow relaxation times, and (c) although an accompanying density modulation is observed to be associated to the zonal flow, it is not consistent with the excitation of pressure side-bands, like those present in geodesic acoustic oscillations, caused by the compression of the ExB flow field.
title: Archaeology of the Contemporary Past: An Interview with Alfredo González-Ruibal, Thomas Kersting and Laurent Olivier
Creators: name: González-Ruibal, Alfredo
name: Kersting, Thomas
name: Olivier, Laurent
name: Of Forum Kritische Archäologie, Editorial Collective
Publisher: name: datalino
Year: 2019

description: Some time ago, Laurent Olivier sent a request to Forum Kritische Archäologie, asking if we would be willing to review a book he and his colleagues had edited. Clashes of Time (2017) is a collection on the theme of archaeology of modern times. Since we do not publish book reviews, we came up with the idea of interviewing him and the editors of two other books on similar topics: Thomas Kersting from the Brandenburg State Heritage Office who co-edited the book Archäologie und Gedächtnis. NS Lagerstandorte Erforschen – Bewahren – Vermitteln (2016) and Alfredo González-Ruibal from the Spanish National Research Council (CSIC), the editor of Rethinking Archaeology: Beyond the Tropes of Modernity (2013). This approach seemed attractive to us because the three interviewees work in different intellectual and disciplinary cultures. Thankfully, all three agreed to respond to a series of seven identical interview questions that we posed to them in writing. Following their answers, we have added a short commentary by the FKA editorial collective.
description: Forum Kritische Archäologie
Masala - Newsletter Virtuelle Fachbibliothek
Creators: name: Merkel-Hilf, Nicole
Publisher: name: Masala: Newsletter Virtuelle Fachbibliothek Südasien
Year: 2015

description: Masala: Newsletter Virtuelle Fachbibliothek Südasien, Bd. 6 Nr. 4 (2011)
Studies, experience, and reflection on the promotion of standardized outcome measures in physical therapy
Creators: name: Kozlowski, Allan John
Publisher: name: University of British Columbia
Year: 2010

description: The use of standardized self-report questionnaires to measure outcome has been promoted in physical therapy (PT) for two decades but has not been widely adopted. Knowledge translation literature has disclosed complex and multidimensional factors associated with practice change in healthcare. Specific barriers and facilitators need to be disclosed to tailor KT interventions. The dissertation is framed with the Ottawa Model for Research Use. Chapter Two describes a comprehensive literature review of interventions to facilitate development of reflective abilities by clinicians, to use reflection to change specific practice abilities, and to implement outcomes measures in healthcare settings. Chapter Three describes a review of Canadian regulatory and professional documents regarding elements of PT practice. Examination and diagnosis elements were represented while prognosis and outcome evaluation were less prevalent. Systematic integration of these latter elements into practice is recommended. Chapter Four describes a statistical evaluation of outcome data collected by a motivated physical therapist and insights she gained from her experience. The evaluation offered an interpretation of data partitioned into meaningful subsets. The clinician’s reflection on her experience provides insight to changes she made in her practice. Chapter Five describes the development of a clinical decision-making model to integrate PT practice elements with the components of the International Classification of Functioning, Disability, and Health. Chapter Six describes a preliminary survey and interview on practices and attitudes towards outcome measurement, and barriers and facilitators to the use of self-report questionnaires to measure outcome. Despite the small sample, insight was gained on some limitations of a scale to measure attitude towards outcome measurement and reported barriers. Chapter 7 provides a summary and synthesis of the findings, and reflections on my experience. Studies on interventions to promote changes in clinical decision-making through adoption of outcome measures in healthcare are sparse. Reflection is one cognitive process that can influence decision-making, but the extent to which these cognitive processes can change is unclear. The meaning of outcome must be understood from the clinician’s perspective and integrated into clinical practice. The Ottawa Model of Research Use functions as a framework to guide planning and redirection of implementation studies.
La sugerencia artística en el diseño tipográfico
Creators: name: Mena, María Pérez
Publisher: name: SOPCOM: Associação Portuguesa de Ciências da Comunicação
Year: 2013

description: La letra surge de la abstracción del pensamiento humano como la manifestación visual del lenguaje. Su evolución gráfica queda desde ese momento ligada y determinada por el desarrollo tecnológico coetáneo. Es por esto que las letras, más allá de su función como medio visual del contenido verbal, son capaces de comunicar contenidos desde su sustancia visual, a través de las connotaciones que subyacen en sus formas. Con las vanguardias artísticas de principios del siglo XX, las letras salen de su contexto y son empleadas desde su potencialidad plástica, evadiéndose de las limitaciones tecnológicas de su producción y generando nuevos discursos visuales. La ruptura com las formulaciones racionalistas y los crecientes avances tecnológicos han favorecido la génesis de un campo de libre experimentación formal en las letras, que las alejan de ser herramientas para la comunicación visual para convertirse en producto de la especulación artística. La facilidad de uso y popularidad de la herramienta digital, y la flexibilidad de factura que el medio ha permitido en los actuales soportes de producción tipográfica, ha dado lugar a la proliferación de una creación tipográfica hacia el arte. Esta comunicación plantea, por el contrario, la configuración de un sistema tipográfico desde presupuestos artísticos y no hacia ellos, tomando como punto de partida la sugerencia plástica que se deriva de la obra del artista vasco Eduardo Chillida. La producción gráfica de Chillida, recoge princípios constructivos vinculados y coincidentes con critérios fundamentales que han determinado tradicionalmente la creación tipográfica. Este estudio se integra dentro del trabajo de investigación que está siendo llevado a cabo por un grupo de docentes e investigadores universitarios de la Universidad del País Vasco/Euskal Herriko Unibertsitatea con el propósito de diseñar la tipografía de identidad visual corporativa de esta universidad a través del proyecto de investigación financiado UPV/EHU PES 11/31.
description: SOPCOM: Associação Portuguesa de Ciências da Comunicação, 2013: 8º SOPCOM: "Comunicação Global, Cultura e Tecnologia"
Masala - Newsletter Virtuelle Fachbibliothek
Creators: name: Merkel-Hilf, Nicole
Publisher: name: Masala: Newsletter Virtuelle Fachbibliothek Südasien
Year: 2015

description: Masala: Newsletter Virtuelle Fachbibliothek Südasien, Bd. 6 Nr. 3 (2011)
Masala - Newsletter Virtuelle Fachbibliothek
Creators: name: Merkel-Hilf, Nicole
Publisher: name: Masala: Newsletter Virtuelle Fachbibliothek Südasien
Year: 2015

description: Masala: Newsletter Virtuelle Fachbibliothek Südasien, Bd. 6 Nr. 2 (2011)
Jornalismo de Dados e Mapping Art: possíveis aproximações
Creators: name: Marques, Daniel Góis Rabêlo
name: Brunet, Karla Schuch
Publisher: name: SOPCOM: Associação Portuguesa de Ciências da Comunicação
Year: 2013

description: O presente artigo tem como objetivo problematizar os limites e aproximações entre o Jornalismo de Dados e a Mapping Art, percebendo ambos enquanto produtos de fenômeno digital emergente, o Big Data, e da crescente presença de Bases de Dados na cultura contemporânea. A partir de uma revisão bibliográfica o artigo retoma os principais pensamentos referentes ao fenômeno Big Data e das diferentes manifestações das bases de dados na cultura, apresentando em seguida o Jornalismo de Dados e a Mapping Art enquanto frutos desse cenário informacional. Por fim, a partir de uma análise de dois projetos dos campos supracitados, o artigo aponta para os possíveis limites e aproximações entre as duas áreas, o jornalismo e a arte, no contexto digital do Big Data.
description: SOPCOM: Associação Portuguesa de Ciências da Comunicação, 2013: 8º SOPCOM: "Comunicação Global, Cultura e Tecnologia"
Masala - Newsletter Virtuelle Fachbibliothek
Creators: name: Merkel-Hilf, Nicole
Publisher: name: Masala: Newsletter Virtuelle Fachbibliothek Südasien
Year: 2015

description: Masala: Newsletter Virtuelle Fachbibliothek Südasien, Bd. 6 Nr. 1 (2011)
A Estereoscopia
Creators: name: Ventura, Jorge Bruno
Publisher: name: SOPCOM: Associação Portuguesa de Ciências da Comunicação
Year: 2013

description: Referenciada pela 1ª vez em 18381 e inventada pelo professor Charles Wheatstone, a estereoscopia permite ver as superfícies das imagens com profundidade, “[cria] um certo efeito de profundidade; mas com este instrumento esse efeito é potenciado de forma a produzir um efeito de realidade que ilude os nossos sentidos com a sua aparência de verdade” (Holmes, 1859: 06). A estereoscopia é uma forma de adequar uma imagem ao modo de ver humano, com capacidade para tornar as imagens mais próximas da realidade. Apesar de fazer uso das imagens fotográficas, a sua invenção é precedente à fotografia e, tal como noutros casos, o seu aparecimento originou uma reorganização do espaço e da mentalidade do observador num contexto de adaptação à novidade que era o facto de não apresentar imagens em movimento. (...)
description: SOPCOM: Associação Portuguesa de Ciências da Comunicação, 2013: 8º SOPCOM: "Comunicação Global, Cultura e Tecnologia"
Interpreting spacetimes of any dimension using geodesic deviation
Creators: name: Podolsky, Jiri
name: Svarc, Robert
Publisher: name: arXiv
Year: 2012
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We present a general method which can be used for geometrical and physical interpretation of an arbitrary spacetime in four or any higher number of dimensions. It is based on the systematic analysis of relative motion of free test particles. We demonstrate that local effect of the gravitational field on particles, as described by equation of geodesic deviation with respect to a natural orthonormal frame, can always be decomposed into a canonical set of transverse, longitudinal and Newton-Coulomb-type components, isotropic influence of a cosmological constant, and contributions arising from specific matter content of the universe. In particular, exact gravitational waves in Einstein's theory always exhibit themselves via purely transverse effects with D(D-3)/2 independent polarization states. To illustrate the utility of this approach we study the family of pp-wave spacetimes in higher dimensions and discuss specific measurable effects on a detector located in four spacetime dimensions. For example, the corresponding deformations caused by a generic higher-dimensional gravitational waves observed in such physical subspace, need not be tracefree.
description: 19 pages, 2 figures. To appear in Phys. Rev. D. The reference [125] added
Masala - Newsletter Virtuelle Fachbibliothek
Creators: name: Merkel-Hilf, Nicole
Publisher: name: Masala: Newsletter Virtuelle Fachbibliothek Südasien
Year: 2015

description: Masala: Newsletter Virtuelle Fachbibliothek Südasien, Bd. 5 Nr. 4 (2010)
Identification of Novel Mechanisms for Myogenic Control of Cerebral Arterial Diameter
Creators: name: Zhong, Xi
Publisher: name: Graduate Studies
Year: 2013
Subjects: subject: Physiology
subject: FOS: Biological sciences
subject: Cerebral Artery
subject: Myogenic response
subject: NO-mediated Vasodilation
subject: Potassium Channel
subject: Cytoskeleton Reorganization
subject: VASP Phosphorylation

description: Myogenic control of cerebral arterial diameter plays a fundamental role in the maintenance of normal vascular resistance and blood flow in the brain. Myogenic control of cerebral artery diameter is achieved by inherent pressure-dependent mechanisms of Ca2+-CaM-MLCK activation, ROK-mediated Ca2+ sensitization and cytoskeleton reorganization. The findings presented in this thesis identify novel elements in these molecular mechanisms, including: (1) Kv9.3 subunits that co-assemble with Kv2.1 subunits to form ScTx1-sensitive channels that regulate Em, (2) Kv7.4-containing channels that also regulate Em, and (3) a cytoskeleton protein, VASP, that is involved in a dynamic process of actin polymerization in response to pressure elevation. Both Kv2.1/9.3 channels and Kv7.4-containing channels of cerebral myocytes were shown to contribute to native Kv currents in myogenic control of cerebral arterial diameter. Regulation of VASP phosphorylation in the process of cytoskeleton reorganization was shown to participate in the pressure-dependent myogenic response and NO-mediated vasodilation of cerebral arteries. In summary, these findings provide novel understanding of the basic molecular mechanisms that contribute to the precise control of vascular smooth muscle contractility, and provide potentially important insights for identification of dysfunctional mechanisms leading to abnormal arterial regulation in pathological conditions, as well as the development of therapeutic strategies to treat arterial dysfunction.
title: Archäologie der Zeitgeschichte: Ein Interview mit Alfredo González-Ruibal, Thomas Kersting und Laurent Olivier
Creators: name: González-Ruibal, Alfredo
name: Kersting, Thomas
name: Olivier, Laurent
name: Des Forum Kritische Archäologie, Herausgeber_innenkollektiv
Publisher: name: datalino
Year: 2019

description: Vor einiger Zeit sandte Laurent Olivier eine Anfrage an das Forum Kritische Archäologie, ob wir nicht das von ihm und Kollegen herausgegebene Buch mit Themen der Neuzeit-Archäologie, Clashes of Time, rezensieren wollten. Da wir keine Standard-Rezensionen im Programm haben, verfielen wir auf die Idee, mit ihm und zwei anderen Herausgebern mit ähnlichen Themen ein schriftliches Interview zu diesem Themenkreis durchzuführen. Dabei handelt es sich um Thomas Kersting vom Landesdenkmalamt Brandenburg bei Berlin, der den Band Archäologie und Gedächtnis. NS Lagerstandorte Erforschen – Bewahren – Vermitteln mitherausgegeben hat, und Alfredo González-Ruibal vom Spanish National Research Council (CSIC), Herausgeber von Rethinking Archaeology: Beyond the Tropes of Modernity. Reizvoll schien uns dieses Vorgehen deshalb, weil die drei Interviewpartner in unterschiedlichen Wissenschaftskulturen beheimatet sind. Dankenswerterweise stimmten alle drei zu, und wir stellten ihnen sieben identische Fragen. Am Ende der Interviewsektion schließt sich ein Kurzkommentar des FKAKollektivs an.
description: Forum Kritische Archäologie
A Cartografia e a Pintura setecentista no Norte da Europa
Creators: name: Ventura, Jorge Bruno
Publisher: name: SOPCOM: Associação Portuguesa de Ciências da Comunicação
Year: 2013

description: A ‘arte de pintar’ de Vermeer é uma das referências quando o propósito é abordar a arte da cartografia em junção com pintura setecentista no Norte da Europa. Nesta obra surge um grande mapa que não passou despercebido aos historiadores de arte e que apresenta indícios de uma analogia entre a cartografia (mapas) e pintura (no caso a holandesa). Esta obra de Vermeer, que apresentamos na figura 1 do presente texto, é considerada a maior e mais complexa obra do autor e é também uma das suas preferidas, tal como prova a recusa da sua venda mesmo em tempos de crise do pintor. É uma pintura óptica com a capacidade de oferecer uma visão realista. Na cena representada, apesar dos vários motivos de interesse apresentados pela obra, interessa colocar o foco da nossa atenção no mapa que pendurado numa das paredes do atelier do pintor. (...)
description: SOPCOM: Associação Portuguesa de Ciências da Comunicação, 2013: 8º SOPCOM: "Comunicação Global, Cultura e Tecnologia"
Masala - Newsletter Virtuelle Fachbibliothek
Creators: name: Merkel-Hilf, Nicole
Publisher: name: Masala: Newsletter Virtuelle Fachbibliothek Südasien
Year: 2015

description: Masala: Newsletter Virtuelle Fachbibliothek Südasien, Bd. 5 Nr. 3 (2010)
Resonant Triad Instability in Stratified Fluids
Creators: name: Joubaud, Sylvain
name: Munroe, James
name: Odier, Philippe
name: Dauxois, Thierry
Publisher: name: arXiv
Year: 2012
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Classical Physics (physics.class-ph)
subject: FOS: Physical sciences

description: Internal gravity waves contribute to fluid mixing and energy transport, not only in oceans but also in the atmosphere and in astrophysical bodies. We provide here the first experimental measurement of the growth rate of a resonant triad instability (also called parametric subharmonic instability) transferring energy to smaller scales where it is dissipated. We make careful and quantitative comparisons with theoretical predictions for propagating vertical modes in laboratory experiments.
Masala - Newsletter Virtuelle Fachbibliothek
Creators: name: Merkel-Hilf, Nicole
Publisher: name: Masala: Newsletter Virtuelle Fachbibliothek Südasien
Year: 2015

description: Masala: Newsletter Virtuelle Fachbibliothek Südasien, Bd. 5 Nr. 2 (2010)
Direct Wind Accretion and Jet Launch in Binary Systems
Creators: name: Barkov, Maxim V.
name: Khangulyan, Dmitry V.
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: In this paper we study the wind accretion onto a rotating black hole in the close binary system harboring a young massive star. It is shown that the angular momentum of the accreted stellar wind material is not sufficient for the formation of an accretion disk. On the other hand, in the considered conditions the Blanford-Znajek mechanism can be activated, thus powerful jets can be launched in the direction of the rotation axis of the black hole. Importantly, no observational signatures of accretion, as typically seen from the thermal X-ray emission from the accretion disks, are expected in the suggested scenario. Here, properties of the generated jet are studied numerically in the framework of a 2D general relativity magnetohydrodynamical approach. Due to the accumulation of the magnetic flux at the black hole horizon, the jet power is expected to be modulated on a sub-second time-scale. Although the intervals between jet active phases depend on the magnetic flux escape from the black hole horizon (which can be modeled self-consistently only using a 3D code), a general estimate of the averaged jet power is obtained. It is expected that for the black hole rotation, expected in stellar binary system (the dimensionless rotation parameter a=0.5), approximately 10% of the accreted rest energy can be channeled into the jets. In the specific case of the gamma-ray binary system LS 5039, the obtained jet luminosity can be responsible for the observed GeV radiation if one invokes Doppler boosting, which can enhanced the apparent flux from the system.
description: 8 pages, 4 figures
Softwares Sociais, Arte e Jornalismo
Creators: name: Velho, Ana Paula Machado
name: Vermelho, Sônia Cristina Dias Soares
name: Domingues, Diana
Publisher: name: SOPCOM: Associação Portuguesa de Ciências da Comunicação
Year: 2013

description: Este artigo reflete sobre o fato de que os jornalistas não são mais meros reprodutores de notícias. Precisam se engajar com a comunidade, se tornar agentes operativos com vistas a contribuir com a trasnformação do cotidiano. Essa necessidade se dá porque, no ambiente da cibercultura, os aparatos técnicos vêm sendo usados para práticas colaborativas de ativismo digital. Estas tecnologias vêm sendo os principais canais de incentivo a estas mobilizações, permitindo que as pessoas se comuniquem e exponham aquilo que mídia tradicional não coloca. Vê-se uma engenharia da cultura, um processo que redesenha a atividade cultural a partir da tecnologia com foco nas transformações sociais. Sugere-se que o jornalista precisa mobilizar o indivíduo para as causas, utilizando as ferramentas com as quais o sujeito lida nos dias de hoje, e adotar a dinâmica que essas plataformas vêm implementando no mundo. Para ilustrar a discussão, utiliza-se a epidemia de dengue que assolou o noroeste do Paraná, em 2013.
description: SOPCOM: Associação Portuguesa de Ciências da Comunicação, 2013: 8º SOPCOM: "Comunicação Global, Cultura e Tecnologia"
Characterization of the Dedifferentiated Schwann Cell and Development of a Deprogramming-Strategy to Enhance Their Regenerative Capacity
Creators: name: Stykel, Morgan
Publisher: name: Graduate Studies
Year: 2016
Subjects: subject: Neuroscience
subject: Schwann cell
subject: Transcription Factors
subject: Reprogramming
subject: Peripheral Nerve Injury
subject: Regeneration
subject: PNS

description: A striking feature of the peripheral nervous system is the ability to regenerate; this ability is, in part, due to the Schwann cell, the glial cell of the periphery. Following peripheral injury, Schwann cells up-regulate a battery of proteins, many of which are re-expressed from development, that drive the efficient regenerative response in the peripheral nervous system. My work described in this thesis characterizes the gene expression profile driving this regenerative response as well as factors implicated during Schwann cell development. Then, I began to develop a deprogramming-based approach to modulate the Schwann cell phenotype by overexpressing the factors of interest. I optimized a deprogramming strategy that can be used to further elucidate the functional contribution of various transcription factors in adult Schwann cells. This can also enhance Schwann cell function following circumstances such prolonged denervation, disease, or advanced aged which often results in impaired regenerative function.
Pietà Árabe: O contributo discursivo do World Press Photo (2012) para a estetização da Informação
Creators: name: Cruz, Andreia
name: Mata, Maria José
name: Simões-Ferreira, Isabel
Publisher: name: SOPCOM: Associação Portuguesa de Ciências da Comunicação
Year: 2013

description: A World Press Photo (WPP) é um dos mais emblemáticos e prestigiantes concursos de fotojornalismo, que conta com milhares de participações anuais. As fotografias selecionadas são notáveis pelos assuntos que tratam, mas são especialmente admiráveis pela forma como representam esses acontecimentos. O presente estudo visa, por isso, analisar a fotografia vencedora da WPP (2012) respeitante a um episódio da revolução da Primavera Árabe, da autoria do fotojornalista catalão, Samuel Aranda. Partindo de uma revisão teórica sobre a dimensão estética do fotojornalismo e o construtivismo das imagens produzidas, este artigo explora, por isso, o poder da voz do visual no campo jornalístico, tendo presente a multifuncionalidade do discurso imagético a vários níveis: ideacional, interpessoal e textual.
description: SOPCOM: Associação Portuguesa de Ciências da Comunicação, 2013: 8º SOPCOM: "Comunicação Global, Cultura e Tecnologia"
Masala - Newsletter Virtuelle Fachbibliothek
Creators: name: Merkel-Hilf, Nicole
Publisher: name: Masala: Newsletter Virtuelle Fachbibliothek Südasien
Year: 2015

description: Masala: Newsletter Virtuelle Fachbibliothek Südasien, Bd. 5 Nr. 1 (2010)
Masala - Newsletter Virtuelle Fachbibliothek
Creators: name: Merkel-Hilf, Nicole
Publisher: name: Masala: Newsletter Virtuelle Fachbibliothek Südasien
Year: 2015

description: Masala: Newsletter Virtuelle Fachbibliothek Südasien, Bd. 4 Nr. 4 (2009)
A imprensa no cruzamento das artes e das letras
Creators: name: Pacheco, José
Publisher: name: SOPCOM: Associação Portuguesa de Ciências da Comunicação
Year: 2013

description: A imprensa, no sentido em que hoje a entendemos, e a imprensa, como sinónimo de tipografia, têm uma história comum que se inicia com a invenção dos tipos móveis e a consequente mecanização da escrita. Com base neste pressuposto, este artigo pretende demonstrar que o design gráfico e o jornalismo não são mais do que denominações de atividades que têm a sua origem no tipógrafo, nas suas duas vertentes, a de compositor de cheio e compositor fantasista, e que a imprensa resultou da interceção das artes gráficas e das letras.
description: SOPCOM: Associação Portuguesa de Ciências da Comunicação, 2013: 8º SOPCOM: "Comunicação Global, Cultura e Tecnologia"
Variational description of Gibbs-non-Gibbs dynamical transitions for the Curie-Weiss model
Creators: name: Fernández, Roberto
name: Hollander, Frank den
name: Martínez, Julián
Publisher: name: arXiv
Year: 2012
Subjects: subject: Probability (math.PR)
subject: Mathematical Physics (math-ph)
subject: General Mathematics (math.GM)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 60F10, 60K35, 82C26 (Primary) 82B26 (Secondary)

description: We perform a detailed study of Gibbs-non-Gibbs transitions for the Curie-Weiss model subject to independent spin-flip dynamics ("infinite-temperature" dynamics). We show that, in this setup, the program outlined in van Enter, Fernández, den Hollander and Redig can be fully completed, namely that Gibbs-non-Gibbs transitions are equivalent to bifurcations in the set of global minima of the large-deviation rate function for the trajectories of the magnetization conditioned on their endpoint. As a consequence, we show that the time-evolved model is non-Gibbs if and only if this set is not a singleton for some value of the final magnetization. A detailed description of the possible scenarios of bifurcation is given, leading to a full characterization of passages from Gibbs to non-Gibbs -and vice versa- with sharp transition times (under the dynamics Gibbsianness can be lost and can be recovered). Our analysis expands the work of Ermolaev and Kulske who considered zero magnetic field and finite-temperature spin-flip dynamics. We consider both zero and non-zero magnetic field but restricted to infinite-temperature spin-flip dynamics. Our results reveal an interesting dependence on the interaction parameters, including the presence of forbidden regions for the optimal trajectories and the possible occurrence of overshoots and undershoots in the optimal trajectories. The numerical plots provided are obtained with the help of MATHEMATICA.
description: Key words and phrases: Curie-Weiss model, spin-flip dynamics, Gibbs vs. non-Gibbs, dynamical transition, large deviations, action integral, bifurcation of rate function
Towards ultrasound-based intraoperative dosimetry for prostate brachytherapy
Creators: name: Wen, Xu
Publisher: name: University of British Columbia
Year: 2010

description: Prostate brachytherapy is a widely used treatment of localized prostate cancer. Intra-operative dose feedback would bring many benefits to patients and healthcare practitioners. Detection of brachytherapy seeds and segmentation of prostate boundaries play key roles in dosimetry for prostate brachytherapy. However, seed detection and prostate segmentation using conventional B-mode transrectal ultrasound still remains a challenge for prostate brachytherapy, mainly due to the small size of brachytherapy seeds in the relatively low-quality B-mode ultrasound images and due to the poor contrast between the prostate gland and surrounding tissues, speckle noise, shadowing and refraction artifacts. In this thesis, a new method called the reflected power imaging is presented to enhance the visibility and imaging of implanted seeds. It directly measures the reflected energy of ultrasound radio-frequency signals without logarithmic compression. Based on this method, we propose a new solution for brachytherapy seed detection in a 3D reflected power image computed from ultrasound radio-frequency signals, instead of conventional B-mode images. Then implanted seeds are segmented in 3D local search spaces that are determined by α priori knowledge, e.g. needle entry points and seed placements in a pre-operative dosimetry plan. Needle insertion tracks are also detected locally by using the Hough Transform. Experimental results show that the proposed solution works well for seed localization in a tissue-equivalent ultrasound prostate phantom implanted according to a realistic treatment plan with 136 seeds from 26 needles. As the prostate is a firm organ relative to surrounding tissues, elastography is a potential imaging modality for the guidance of prostate brachytherapy. A dynamic ultrasound elastography method named vibro-elastography can provide more complete dynamic tissue description in terms of transfer functions and coherence functions. In this thesis, we develop fast computational algorithms and programs to implement vibro-elastography imaging in real time. Phantom experiments demonstrate that the vibro-elastography techniques produce stable and operator-independent strain images with high contrast-to-noise ratio. Furthermore, the software for a 3D vibro-elastography imaging system has been designed, implemented and used in the data collection. Over 15 patients have been scanned at the British Columbia Cancer Agency, Vancouver Centre, and the results are encouraging.
Teoria da comunicação: tendências e actualidade
Creators: name: Alves, Aníbal A.
Publisher: name: SOPCOM: Associação Portuguesa de Ciências da Comunicação
Year: 2005

description: São frequentes os equívocos e confusões acerca da área, disciplina ou ciência da comunicação. Uma das mais recentes, entre a nossa comunidade lusa, foi o facto de a Comissão de Avaliação Extrerna dos Cursos de “Ciências e Tecnologias da Comunicação” ter daparado, em plena fase da visita institucional, com um curso que se viu na obrigação de não reconhecer como pertencente à área de cursos que tinha a missão de avaliar. (...)
description: SOPCOM: Associação Portuguesa de Ciências da Comunicação, 2005: 4º SOPCOM: “Repensar os Media: Novos Contextos da Comunicação e da Informação”
Masala - Newsletter Virtuelle Fachbibliothek
Creators: name: Merkel-Hilf, Nicole
Publisher: name: Masala: Newsletter Virtuelle Fachbibliothek Südasien
Year: 2015

description: Masala: Newsletter Virtuelle Fachbibliothek Südasien, Bd. 4 Nr. 2 (2009)
Publicidade escondida com mitos de fora: uma aplicação prática do modelo teórico de Requena na análise de um spot publicitário
Creators: name: Oliveira, Susana
name: Silva, Samuel
name: Ferreira, Victor
Publisher: name: SOPCOM: Associação Portuguesa de Ciências da Comunicação
Year: 2005

description: Este texto surge no âmbito do trabalho de aprendizagem realizado pelos três autores, durante o ano lectivo de 2004/2005, para a cadeira de Teorias da Comunicação, do segundo ano da licenciatura em Comunicação Social da Universidade do Minho. O leitmotiv deste relatório é a análise de um episódio comunicativo, neste caso um spot publicitário produzido pela agência Bartle Bogle Hegarty (Londres) para a marca de uísque “Johnny Walker” e que foi aprovado pela Diageo, empresa detentora da marca, para os media Televisão e Cinema. Estreado em 2003, o referido spot, intitulado “Fish”, beneficiou de difusão mundial e acabaria por ganhar, entre o ano de estreia e o seguinte, cinco prémios em concursos e festivais de publicidade, incluindo o prémio “Leão de Ouro” 2003 (segmento de bebidas espirituosas e alcoólicas), atribuído no Festival Internacional de Publicidade de Cannes (França). (...)
description: SOPCOM: Associação Portuguesa de Ciências da Comunicação, 2005: 4º SOPCOM: “Repensar os Media: Novos Contextos da Comunicação e da Informação”
Classical Theory of High Field Atomic Ionization Using Elliptical Polarization
Creators: name: Wang, Xu
name: Eberly, J. H.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: Important information about strong-field atomic or molecular ionization can be missed when using linearly polarized laser fields. The field strength at which an electron was ionized, or the time during a pulse of the ionization event are examples of such missing information. In treating single, double, and triple ionization events we show that information of this kind is made readily available by use of elliptical polarization.
Masala - Newsletter Virtuelle Fachbibliothek
Creators: name: Merkel-Hilf, Nicole
Publisher: name: Masala: Newsletter Virtuelle Fachbibliothek Südasien
Year: 2015

description: Masala: Newsletter Virtuelle Fachbibliothek Südasien, Bd. 4 Nr. 1 (2009)
Maximum Lq-Likelihood Estimation for Gamma Distributions
Creators: name: Xing, Nana
Publisher: name: Graduate Studies
Year: 2015
Subjects: subject: Statistics
subject: FOS: Mathematics
subject: Maximum Lq-Likelihood Estimation
subject: Gamma Distributions
subject: Monte Carlo Simulation

description: MLqE is an extension of MLE which introduces a distortion parameter q to MLE to make the estimation more adaptive. The purpose of this thesis is to examine MLqE for specific distribution models. Particularly, for exponential and standard gamma distributions, we look at their asymptotics, finite sample performance in terms of efficiency and robustness, and the choice of the distortion parameter q. We investigate these aspects of MLqE, compared with MLE, in parameter estimation and tail probability estimation through both Monte Carlo simulation and a real data analysis. Our results show that, when exponential or standard gamma models are concerned, MLqE and MLE perform competitively for large sample sizes while MLqE outperforms MLE for small or moderate sample size in terms of reducing MSE. In addition, MLqE generally has better robustness properties than MLE with respect to outlying observations.
The Shear Viscosity to Entropy Ratio: A Status Report
Creators: name: Cremonini, Sera
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: This review highlights some of the lessons that the holographic gauge/gravity duality has taught us regarding the behavior of the shear viscosity to entropy density in strongly coupled field theories. The viscosity to entropy ratio has been shown to take on a very simple universal value in all gauge theories with an Einstein gravity dual. Here we describe the origin of this universal ratio, and focus on how it is modified by generic higher derivative corrections corresponding to curvature corrections on the gravity side of the duality. In particular, certain curvature corrections are known to push the viscosity to entropy ratio below its universal value. This disproves a longstanding conjecture that such a universal value represents a strict lower bound for any fluid in nature. We discuss the main developments that have led to insight into the violation of this bound, and consider whether the consistency of the theory is responsible for setting a fundamental lower bound on the viscosity to entropy ratio.
description: 29 pages. Invited review for Modern Physics Letters B. References and minor comments added
Masala - Newsletter Virtuelle Fachbibliothek
Creators: name: Merkel-Hilf, Nicole
Publisher: name: Masala: Newsletter Virtuelle Fachbibliothek Südasien
Year: 2015

description: Masala: Newsletter Virtuelle Fachbibliothek Südasien, Bd. 3 Nr. 4 (2008)
Imagem humana: facilitadora ou inibidora da inclusão sociocomunicacional
Creators: name: Guerreiro, Augusto Deodato
Publisher: name: SOPCOM: Associação Portuguesa de Ciências da Comunicação
Year: 2005

description: O nosso corpo, o habitáculo temporário e visibilidade do nosso desenvolvimento neuropsicomotor, tem direitos e deveres a fruir como garantes da sua íntegra e digna sustentabilidade, veiculando, interagindo e materializando (através de processos endógeno e exógeno) as nossas preferências, opções, os nossos desejos, amores e ódios, actos e omissões, na interacção e intercompreensão humanas. Tem direito mesmo apresentando disfunções que nos condicionem ou impossibilitem de interagir normalmente a existir e a viver como reflexo ontogénico feliz de todas as nossas manifestações. (...)
description: SOPCOM: Associação Portuguesa de Ciências da Comunicação, 2005: 4º SOPCOM: “Repensar os Media: Novos Contextos da Comunicação e da Informação”
Masala - Newsletter Virtuelle Fachbibliothek
Creators: name: Merkel-Hilf, Nicole
Publisher: name: Masala: Newsletter Virtuelle Fachbibliothek Südasien
Year: 2015

description: Masala: Newsletter Virtuelle Fachbibliothek Südasien, Bd. 4 Nr. 3 (2009)
Comunicação e transparência: a comunicação indirecta
Creators: name: Serra, Paulo
Publisher: name: SOPCOM: Associação Portuguesa de Ciências da Comunicação
Year: 2005

description: A “sociedade da comunicação” é uma sociedade que elegeu a transparência como máxima e o público como instância suprema. Na “sociedade da comunicação”, a palavra público é, simultaneamente, um substantivo e um adjectivo. (...)
description: SOPCOM: Associação Portuguesa de Ciências da Comunicação, 2005: 4º SOPCOM: “Repensar os Media: Novos Contextos da Comunicação e da Informação”
Editor’s choice 2019: Oxidative stress and antineoplastic agents
Creators: name: Ghallab, Ahmed
Publisher: name: IfADo - Leibniz Research Centre for Working Environment and Human Factors, Dortmund
Year: 2020
Subjects: oxidative stress
antineoplastic agents

description: EXCLI Journal; 19:Doc1607; ISSN 1611-2156