cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Complete Break Up of Ortho Positronium (Ps)- Hydrogenic ion System
Creators: name: Ghosh, D.
name: Mukhopadhyay, S.
name: Sinha, C.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: The dynamics of the complete breakup process in an Ortho Ps - He+ system including electron loss to the continuum (ELC) is studied where both the projectile and the target get ionized. The process is essentially a four body problem and the present model takes account of the two centre effect on the electron ejected from the Ps atom which is crucial for a proper description of the ELC phenomena. The calculations are performed in the framework of Coulomb Distorted Eikonal Approximation. The exchange effect between the target and the projectile electron is taken into account in a consistent manner. The proper asymptotic 3-body boundary condition for this ionization process is also satisfied in the present model. A distinct broad ELC peak is noted in the fully differential cross sections (5DCS) for the Ps electron corroborating qualitatively the experiment for the Ps - He system. Both the dynamics of the ELC from the Ps and the ejected electron from the target He+ in the FDCS are studied using coplanar geometry. Interesting features are noted in the FDCS for both the electrons belonging to the target and the projectile.
description: 14 pages,7 figures
Toward a history of the Oromo of Wallaga in southwestern Ethiopia: an ethnoarchaeological study of ceramic technological style and tuber crop domestication.
Creators: name: Wayessa, Bula Sirika
Publisher: name: Graduate Studies
Year: 2016
Subjects: subject: Archaeology
subject: Ethnoarchaeology
subject: Oromo
subject: Pottery Technology
subject: Tuber crop
subject: Wallaga

description: The primary objective of this study is to determine a material means to investigate the little known history of Wallaga Oromo and their contribution to tuber crop domestication in southwestern Ethiopia using an ethnoarchaeological approach. This goal is addressed through a unique approach that first determined the ceramic technological style of Wallaga Oromo potters using a chaîne opératoire methodology, and then linking the chaîne opératoire with Wallaga Oromo culinary practices that are associated with tuber crops that leave residues on steaming pots. Both technological style and cuisine are considered as strong markers of specific social groups and are a strong proxy for investigating Oromo history and use of specific tuber crops. This assertion was supported by a comparative study of the culinary practices and pottery technological styles of two neighboring groups: the Yem and the Dawro. These groups have separate and distinct technological styles and culinary practices. Data were collected using ethnoarchaeological methods of interview and observation of farmers and potters in the study area. In this region, potters experience a low social status within the Oromo social stratification system. The study further demonstrates how Oromo pottery is engaged in daily and ritual practice in the region. The research represents the first comprehensive study of marginalized Oromo potters, the relationship between Oromo pottery and cultural cuisine, and how Oromo history and worldviews are expressed through material culture associated with pottery-making and its consumption. The study also investigated Oromo women’s contributions to indigenous technology and their agricultural knowledge of tuber production and consumption.
Number of Common Sites Visited by N Random Walkers
Creators: name: Majumdar, Satya N.
name: Tamm, Mikhail V.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We compute analytically the mean number of common sites, W_N(t), visited by N independent random walkers each of length t and all starting at the origin at t=0 in d dimensions. We show that in the (N-d) plane, there are three distinct regimes for the asymptotic large t growth of W_N(t). These three regimes are separated by two critical lines d=2 and d=d_c(N)=2N/(N-1) in the (N-d) plane. For d<2, W_N(t)\sim t^{d/2} for large t (the N dependence is only in the prefactor). For 2d_c(N), W_N(t) approaches a constant as t\to \infty. Exactly at the critical dimensions there are logaritmic corrections: for d=2, we get W_N(t)\sim t/[\ln t]^N, while for d=d_c(N), W_N(t)\sim \ln t for large t. Our analytical predictions are verified in numerical simulations.
description: 5 pages, 3 .eps figures included
Young stellar groups in M 33 galaxy: delineation and main parameters
Creators: name: Vassileva, Luba
name: Veltchev, Todor
name: Georgiev, Tsvetan
name: Nedialkov, Petko
Publisher: name: arXiv
Year: 2011
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The problem of (non-)existence of a typical size of the stellar associations is revisited by use of deep UBVRI stellar CCD photometry in M 33 from the Local Group Survey (Massey et al. 2006). We compare the outlines of the `classical OB associations' (Ivanov 1991) with stellar groups that were selected through an objective method for determination of the local stellar density and delineation. Main parameters of some stellar groups like size, shape and density concentrations are determined.
description: Proc. VI Serbian-Bulgarian Astronomical Conference, Belgrade 7-11 May 2008
A TV como objeto de leitura da imagem no contexto escolar: uma pesquisa-ação com alunos do ensino médio
Creators: name: Pinheiro, Mírian Moema Filgueira
Publisher: name: SOPCOM: Associação Portuguesa de Ciências da Comunicação
Year: 2013

description: Esta pesquisa procura refletir sobre a dinâmica da recepção televisiva, estudando a microsérie Hoje é dia de Maria, produzida pela Rede Globo de Televisão e tem por objetivo geral, promover inferências no processo de leitura da imagem, principalmente à leitura estética no contexto escolar, visando à formação de leitores visuais proficientes. A pesquisa foi desenvolvida com alunos da 3ª série do ensino médio em uma escola pública do Estado, situada geograficamente na cidade do Natal, RN. O enquadre teórico parte dos pressupostos do sociointeracionismo cognitivista para entender a linguagem, ancorada nas ideias de Bakhtin (1994) e Vygotsky (1998) para entender a interação social e a Teoria da Recepção Estética e do Efeito com Jauss (1979) e Iser (1999), de forma a compreender a experiência estética, efeito estético e produção de sentido. A abordagem metodológica assume um viés qualitativo de caráter interpretativista, dada pelos momentos de entrevistas, observação, questionário e da aplicação de um conjunto de atividades investigativas, como exposição de temas introdutórios, veiculação de imagens e processo de mediação. O trabalho é fruto de uma investigação-ação, num processo de intervenção pedagógica na escola. Os resultados verificaram que os recursos linguísticos interacionais mobilizados pelos interlocutores demonstrou a falta de repertório e conhecimento prévio sobre leitura de imagem, ficando evidente que os participantes da pesquisa desconheciam sobre leitura de imagem, o que os levou a fazer inicialmente uma leitura superficial. Mas, no decorrer dos encontros, foi possível, perceber as transformações, com o auxílio da mediação que os ajudou reflexionar o texto audiovisual de forma mais autônoma e segura.
description: SOPCOM: Associação Portuguesa de Ciências da Comunicação, 2013: 8º SOPCOM: "Comunicação Global, Cultura e Tecnologia"
Electronic circuits manifesting hyperbolic chaos and their simulation with software package Multisim
Creators: name: Kuznetsov, Sergey P.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: We consider several electronic circuits, which represent dynamical systems with hyperbolic chaotic attractors of Smale-Williams type, and demonstrate results of their simulation using the software package NI Multisim 10. The developed approach is useful as an intermediate step of constructing real electronic devices manifesting structurally stable hyperbolic chaos applicable e.g. in systems of secure communication, noise radar, for cryptographic systems and random number generators. This is also of methodological interest for training students who specialize in radio-physics and nonlinear dynamics in the design and analysis of systems with complex dynamics using examples close to practical applications.
description: 15 pages, 16 figures
As Questões de Género na perceção das competências para o uso de Tecnologias da Comunicação: um estudo sobre os alunos do Ensino Superior Público Português
Creators: name: Morais, Nídia Salomé
name: Ramos, Fernando
Publisher: name: SOPCOM: Associação Portuguesa de Ciências da Comunicação
Year: 2013

description: A investigação apresentada neste artigo teve como principal objetivo contribuir para uma compreensão mais alargada do uso que os estudantes do Ensino Superior Público Português (ESPP) fazem das Tecnologias da Comunicação (TC) para suporte à aprendizagem. Especificamente, procurou-se estudar a influência do género neste contexto e, no âmbito do presente artigo, apresenta-se parte da fundamentação teórica que sustenta o estudo, os objetivos e as opções metodológicas, bem como alguns dos resultados obtidos, em particular os que dizem respeito às diferenças de género na perceção das competências para o uso de TC para suporte à aprendizagem. Os resultados obtidos indicam que a maioria dos estudantes classifica as suas competências como sendo boas ou muito boas e, no que se refere à influência do género, os testes estatísticos sugerem a existência de diferenças significativas entre o sexo masculino e o sexo feminino na perceção das suas competências para o uso de TC.
description: SOPCOM: Associação Portuguesa de Ciências da Comunicação, 2013: 8º SOPCOM: "Comunicação Global, Cultura e Tecnologia"
Engineering Improved Seed Degreening in Brassica napus (canola)
Creators: name: Perkins, Mendel
Publisher: name: Graduate Studies
Year: 2017
Subjects: subject: Botany
subject: Biology--Molecular
subject: Plant Physiology
subject: biotechnology
subject: canola
subject: degreening
subject: stress tolerance

description: Frost during Brassica napus (canola) embryo development increases seed chlorophyll content at maturity causing losses to canola producers. In Arabidopsis, it was demonstrated that the transcription factor, ABI3, regulates genes responsible for seed maturation and de-greening. During seed maturation, ABI3 is required for the activation of the SGR2 (stay-green) which drives degreening and overexpression of ABI3 was sufficient to impart frost-tolerant degreening. Given the high sequence similarity between Arabidopsis and canola, this system can be easily translated into canola. ABI3 homolog isolated from canola was able to complement Arabidopsis abi3-6 mutant, indicating conserved function. Canola transgenics overexpressing ABI3 were developed and were shown to promote significant degreening of seeds despite frost exposure. These transgenic lines also did not exhibit any deleterious pleiotropic effects. This study provides evidence for how enhanced expression of ABI3 confers frost-tolerant degreening, a trait that could be easily incorporated into canola hybrids.
Materiais audiovisuais para a Educação a Distância: a contribuição dos estilos de aprendizagem
Creators: name: Santos, Vanessa Matos Dos
Publisher: name: SOPCOM: Associação Portuguesa de Ciências da Comunicação
Year: 2013

description: A compressão do tempo-espaço ocasionada pelas novas tecnologias da informação e comunicação somada à constante necessidade de especialização gerada pelo mundo do trabalho têm feito com que antigas demandas populacionais pressionem cada vez mais o sistema público de ensino em busca de aperfeiçoamento. O sistema educacional, por sua vez, é pressionado para atender Sujeitos com necessidades diferentes e em tempos diversos. Neste cenário, a educação a distância (EAD) tem sido resgatada como uma importante aliada na tarefa de democratizar o acesso à educação. Além de outras ferramentas, a EAD tem feito uso intensivo dos audiovisuais como forma de potencializar a compreensão da mensagem, principalmente quando os Sujeitos do processo educativo estão separados fisicamente. Os estilos de aprendizagem permitem dar relevo às diferenças individuais e nortear os usos dos materiais audiovisuais que sejam mais adequados, segundo as necessidades específicas dos alunos. Assim sendo, esta pesquisa teve como objetivo geral compreender os materiais audiovisuais educativos de acordo com os estilos de aprendizagem, indicando caminhos e estratégias de utilização. Soma-se a este aspecto, o fato de que os audiovisuais educativos podem proporcionar o desenvolvimento de estilos menos desenvolvidos nos alunos, ampliando as oportunidades de aprendizagem. Partindo destes pontos, e tendo como respaldo teórico a Teoria dos Estilos de Aprendizagem, a pesquisa aponta como os audiovisuais podem ser utilizados para situações de aprendizagem em EAD, assim como também apresenta caminhos para pensar a gestão de conteúdos educativos de forma mais personalizada, ensejando uma relação mais próxima entre Comunicação e Educação.
description: SOPCOM: Associação Portuguesa de Ciências da Comunicação, 2013: 8º SOPCOM: "Comunicação Global, Cultura e Tecnologia"
VLTI/AMBER observations of the Seyfert nucleus of NGC 3783
Creators: name: Weigelt, G.
name: Hofmann, K. -H.
name: Kishimoto, M.
name: Hönig, S.
name: Schertl, D.
name: Marconi, A.
name: Millour, F.
name: Petrov, R.
name: Fraix-Burnet, D.
name: Malbet, F.
name: Tristram, K.
name: Vannier, M.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Context. The putative tori surrounding the accretion disks of active galactic nuclei (AGNs) play a fundamental role in the unification scheme of AGNs. Infrared long-baseline interferometry allows us to study the inner dust distribution in AGNs with unprecedented spatial resolution over a wide infrared wavelength range. Aims. Near- and mid-infrared interferometry is used to investigate the milli-arcsecond-scale dust distribution in the type 1.5 Seyfert nucleus of NGC 3783. Methods. We observed NGC 3783 with the VLTI/AMBER instrument in the K-band and compared our observations with models. Results. From the K-band observations, we derive a ring-fit torus radius of 0.74 +/- 0.23 mas or 0.16 +/- 0.05 pc. We compare this size with infrared interferometric observations of other AGNs and UV/optical-infrared reverberation measurements. For the interpretation of our observations, we simultaneously model our near- and mid-infrared visibilities and the SED with a temperature/density-gradient model including an additional inner hot 1400 K ring component.
Reinventing the time of the past : rhythmic voicing and metrical allusion in the music of George Benjamin and Thomas Adès
Creators: name: Goldberg, Daniel Lawrence
Publisher: name: University of British Columbia
Year: 2010

description: This study proposes a method for analyzing rhythm in relation to conventional meter. The concept of rhythmic voicing informs a basic analytical strategy that is flexible enough to represent different forms of rhythmic organization and to accommodate various theoretical perspectives. The theoretical perspective developed here employs cognitive schemata to construct a model of how listeners interpret rhythmic patterns in terms of conventional meter, even when the rhythms do not fully conform to the characteristics of this meter. Rhythms that invoke but deviate from meter are understood as metrical allusions according to the categories of simple allusion, disjunction, and distortion. Metaphorically applied image schemata further interpret the changes in metrical allusions during a piece, contributing to the comprehension of form and meaning. The method is applied in analyses of works by two contemporary British composers: Sudden Time and Three Inventions for Chamber Orchestra by George Benjamin, and Asyla and Piano Quintet by Thomas Adès.
Roles of Endothelial Toll-like Receptor (TLR) 4 in Neutrophil Recruitment During Experimental Colitis
Creators: name: Wang, Tie
Publisher: name: Graduate Studies
Year: 2017
Subjects: subject: Immunology
subject: FOS: Clinical medicine
subject: Toll-like receptor 4
subject: Endothelial Cells
subject: experimental colitis
subject: neutrophil recruitment
subject: inflammatory bowel diseases

description: The innate immune system uses pattern recognition receptors (PRRs) encoded by germline genes of the host to detect danger signals from damaged tissues as well as conserved microbial “molecular patterns” called damage- or pathogen-associated molecular patterns (DAMPs or PAMPs). PRRs are essential for the initiation of immune responses. Among PRRs, Toll-like Receptor (TLR) 4 has gained a great deal of attention, as it is the first discovered PRR, and it is the receptor for lipopolysaccharide (LPS, a major cell wall component of Gram-negative bacteria). It has been demonstrated that TLR4 has many roles in the pathogenesis of inflammatory bowel diseases (IBD) and experimental colitis. However, the functions of endothelial TLR4 remain unclear. In this thesis, we hypothesized that endothelial TLR4 provokes neutrophil recruitment in the colon during experimental colitis. Endothelial TLR4 is upregulated during dextran sulfate sodium (DSS)-induced colitis, in part by tumor necrosis factor (TNF)-α. The upregulation of endothelial TLR4 occurs prior to neutrophil recruitment in DSS colitis. Loss of endothelial TLR4 attenuates the histological damage in DSS-induced colitis. Mice lacking endothelial TLR4 have fewer colonic neutrophils during DSS colitis. Mice with a specific deletion of endothelial TLR4 have a decreased number of adherent neutrophils in the microcirculation of their colon upon DSS challenge. NanoString nCounter CodeSet analysis showed endothelial intercellular adhesion molecule (ICAM) 2 has lower expression in mice lacking endothelial TLR4, measured by immunofluorescence and flow cytometry. In vitro cultured endothelial cells respond to LPS challenge to increase the expression of ICAM2. Blocking of ICAM2 also inhibits neutrophil adhesion in DSS colitis. In conclusion, endothelial TLR4 is an active player in experimental colitis and mediates neutrophil recruitment.
SAT-Based Termination Analysis Using Monotonicity Constraints over the Integers
Creators: name: Codish, Michael
name: Gonopolskiy, Igor
name: Ben-Amram, Amir M.
name: Fuhs, Carsten
name: Giesl, Jürgen
Publisher: name: arXiv
Year: 2011
Subjects: subject: Logic in Computer Science (cs.LO)
subject: FOS: Computer and information sciences

description: We describe an algorithm for proving termination of programs abstracted to systems of monotonicity constraints in the integer domain. Monotonicity constraints are a non-trivial extension of the well-known size-change termination method. While deciding termination for systems of monotonicity constraints is PSPACE complete, we focus on a well-defined and significant subset, which we call MCNP, designed to be amenable to a SAT-based solution. Our technique is based on the search for a special type of ranking function defined in terms of bounded differences between multisets of integer values. We describe the application of our approach as the back-end for the termination analysis of Java Bytecode (JBC). At the front-end, systems of monotonicity constraints are obtained by abstracting information, using two different termination analyzers: AProVE and COSTA. Preliminary results reveal that our approach provides a good trade-off between precision and cost of analysis.
Repatriation, digital technology, and culture in a northern Athapaskan community
Creators: name: Hennessy, Kate
Publisher: name: University of British Columbia
Year: 2010

description: Many Canadian First Nations and Aboriginal organizations are using digital media to revitalize their languages and assert control over the representation of their cultures. At the same time, museums and academic institutions are digitizing their ethnographic collections to make them accessible to originating communities. As the use of digital media becomes standard practice both in the production of ethnographic objects and the “virtual repatriation” of cultural heritage, new questions are being raised regarding copyright, intellectual property, ownership, and control of documentation in digital form. In this dissertation, based on collaborative ethnographic multimedia production work with the Doig River First Nation (Dane-ẕaa) in northeastern British Columbia, I follow the transformation of intangible cultural expression into digital cultural heritage, and its return in the form of a digital archive to Dane-ẕaa communities. I explore how new access to digitized ethnographic documentation has facilitated local media production, and argue that these productions are acts of remediation of digital cultural heritage that resignify the products of ethnographic research in Dane-ẕaa communities. Through the lens of the collaborative production of the Virtual Museum of Canada exhibit Dane Wajich–Dane-ẕaa Stories and Songs: Dreamers and the Land, I show how local control over efforts to safeguard intangible heritage resulted in the implementation of a documentary methodology that modeled the appropriate transmission of culture in Dane-ẕaa social practice. The participatory production process of the virtual exhibit also facilitated expressions of Dane-ẕaa intellectual property rights to cultural heritage. Using the example of the digitization of photographs of early twentieth-century Dane-ẕaa nááchę (dreamers’) drums, and the community’s subsequent decision to remove them from the virtual museum exhibit, I explore how new articulations of Dane-ẕaa rights to control the circulation and representation of their digital cultural heritage are guided by knowledge of Dane-ẕaa nááchę, traditional protocols for the handling and care of material culture, and by contemporary political concerns and subjectivities.
Performance Evaluation of A Proposed Variant of Frequency Count (VFC) List Accessing Algorithm
Creators: name: Mohanty, Rakesh
name: Dash, Shiba Prasad
name: Sharma, Burle
name: Patel, Sangita
Publisher: name: arXiv
Year: 2012
Subjects: subject: Data Structures and Algorithms (cs.DS)
subject: FOS: Computer and information sciences

description: Frequency Count (FC) algorithm is considered as the static optimal algorithm for the list accessing problem. In this paper, we have made a study of FC algorithm and explore its limitation. Using the concept of weak look ahead, we have proposed a novel Variant of Frequency Count (VFC) list accessing algorithm. We have evaluated the performance of FC and our proposed VFC algorithm experimentally using input data set from Calgary Corpus. Our experiments show that for all request sequences and list generated from the above data set VFC performs better than FC.
description: 4 pages, Proceedings of International Conference on Recent Advances in Engineering and Technology, Hyderabad, India, April, 2012
Brincar com o Scrach: uma experienciação privilegiada de comunicação na infância
Creators: name: Oliveira, Ana Patrícia
name: Lopes, Maria Conceição
Publisher: name: SOPCOM: Associação Portuguesa de Ciências da Comunicação
Year: 2013

description: O projeto Scratch’ando com o sapo na infância é desenvolvido com crianças do jardim-de-infância e pretende demonstrar como o Scratch do MIT Media Lab (aplicação e linguagem de programação para crianças dos 8 aos 12 anos) pode promover o brincar social espontâneo (BSE) na infância, ainda que, na fase inicial as crianças sejam assessoradas pela intervenção mediadora dos adultos. A metodologia de suporte ao projeto é a investigaçãoação, sendo esta complementada pela metodologia de promoção do BSE, que evolui iterativamente ao longo de vários estádios e fases sequenciais, permitindo, ao longo do processo de aprendizagem da autonomia, identificar qual é o nível do brincar social espontâneo em que as crianças se encontram, quando brincam com o Scratch. As sessões de intervenção-formação-experienciação com a programação Scratch decorrem na Cooperativa de Educação e Ensino A Torre em Lisboa, e são realizadas em duas fases, a primeira é desenvolvida com crianças de 5 e 6 anos de idade e a segunda com crianças de 4 e 5 anos de idade. Em 2009 também foram criados, com a coparticipação das crianças, um conjunto de onze tutoriais que estão disponíveis no portal SAPO Kids (http://kids.sapo.pt/ scratch/formacao), bem como personagens (guardiões do Scratch’ando com o sapo) que guiam as crianças na narrativa e nas tarefas tutoradas para o domínio da programação Scratch. Nas sessões de intervençãoformação-experienciação utilizam-se estes tutoriais, de forma a apoiar as crianças a explorarem o brinquedo, do mesmo modo que se percebe como as crianças alvo do estudo interagem e se expressam brincriando no Scratch.
description: SOPCOM: Associação Portuguesa de Ciências da Comunicação, 2013: 8º SOPCOM: "Comunicação Global, Cultura e Tecnologia"
Remarks on Gurarii spaces
Creators: name: Garbulińska, Joanna
name: Kubiś, Wiesław
Publisher: name: arXiv
Year: 2011
Subjects: subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: 46B04, 46B20

description: We present selected known results and some of their improvements, involving Gurarii spaces. A Banach space is Gurarii if it has certain natural extension property for almost isometric embeddings of finite-dimensional spaces. Deleting the word "almost", we get the notion of a strong Gurarii space. There exists a unique (up to isometry) separable Gurarii space, however strong Gurarii spaces cannot be separable. The structure of the class of non-separable Gurarii spaces seems to be not very well understood. We discuss some of their properties and state some open questions. In particular, we characterize non-separable Gurarii spaces in terms of skeletons of separable subspaces, we construct a non-separable Gurarii space with a projectional resolution of the identity and we show that no strong Gurarii space can be weakly Lindelöf determined.
description: 30 pages
Investigation of 'Sloughing Behaviour' of Wax Deposit from Paraffin mIxtures in Pipe Flow
Creators: name: Sinha, Chandni
Publisher: name: Graduate Studies
Year: 2016
Subjects: Engineering--Chemical

description: Sloughing of wax deposit from ‘waxy’ crude oils has been described in the literature whereby the deposit is postulated to dislodge from the pipe-wall due to changes in flow parameters. A bench scale flow loop apparatus was designed to carry out three sets of experiments wherein the deposit-layer at steady-state was subjected to step changes in the oil flow rate, the oil inlet temperature, and the coolant inlet temperature. Each of these parameters was varied at several levels, while allowing the deposition process to reach thermal steady-state at each level. It was observed that the deposit-layer thickness decreased gradually with an increase in each parameter. However, a complete or sudden dislodging of the deposit-layer was not observed at any point. A steady-state heat-transfer model was used to predict changes in the deposit mass as a function of variation in the selected parameters, and the predictions were found to match the experimental results adequately.
Constraining the properties of K_{l3} form factors with analyticity and unitarity
Creators: name: Abbas, Gauhar
name: Ananthanarayan, B.
name: Caprini, Irinel
name: Imsong, I. Sentitemsu
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: Bounds on the shape parameters of K_{l3} form factors are investigated in a general model independent framework. Using the method of unitarity bounds for correlators evaluated in pQCD, chiral symmetry and experimental information on the phase and modulus of πK form factors up to an energy t_{in}=1 GeV^2, we constrain the shape parameters of the scalar and vector form factors, the value of the scalar form factor at t=M_π^2-M_K^2, and exclude regions where zeros can exist on the real energy line and in the complex energy plane.
description: 8 pages latex, PoS style files, talk given at RADCOR 2011, Mamallapuram, India, 26 - 30 September, 2011; replaced with v2 which corrects typographical error in one of the author's names and eliminates 2 other minor typographical errors
Gender Biases and Armed Conflict: Assessing the Reintegration Experience of Women from the LRA
Creators: name: Pavelich, Kimberly
Publisher: name: Graduate Studies
Year: 2013
Subjects: subject: African
subject: Military Studies
subject: Women's Studies
subject: Reintegration
subject: Gender
subject: Uganda

description: Women are actively involved as combatants in many irregular armed forces. This runs counter to a common belief that when involved with an armed group, women are limited to traditional gender roles such as cooking, cleaning, and being a wife. By opposing traditional gender assumptions during conflict, these women are often rejected or stigmatized by their community following their return from the force – indicating that they have failed in their reintegration post conflict. This represents the case for women who have returned from the Lord’s Resistance Army (LRA) in Northern Uganda. In seeking to explain this outcome for ex-LRA women in comparison to women who did not serve in the LRA, and to men who returned from the force as well, this thesis raises the question: why are women who are returning from the LRA unsuccessful in their reintegration?
Scientific Research
Creators: name: Jayshiv Limbasia
Publisher: name: figshare
Year: 2020
Subjects: subject: 100503 Computer Communications Networks
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: 80104 Computer Vision
subject: FOS: Computer and information sciences

description: Study About Children analysis using computer Interfaec
As Tecnologias da Informação e da Comunicação (TICs) na Educação a Distância (EAD) como propulsoras de mudanças de modelos pedagógicos
Creators: name: Buogo, Ana Lúcia
name: Camana, Carmen Regina
Publisher: name: SOPCOM: Associação Portuguesa de Ciências da Comunicação
Year: 2013

description: A humanidade vive hoje situações paradoxais em termos culturais, econômicos, tecnológicos, sociais, intelectuais. Se, por um lado, com as revoluções científicas, industriais e tecnológicas desencadeadas a partir da metade do século passado, o ser humano passou a ter acesso ilimitado a todo planeta, com a abertura para novas formas de lidar com a realidade e com a ampliação de oportunidades, empregos, mercados, formações; por outro, ainda percebemos a existência das desigualdades sociais, da busca pelas verdades absolutas, da repetição de modelos, das mesmas formas de aprender e conceber o conhecimento. O rompimento desse paradoxo, ou pelo menos, sua minimização, parece depender de uma nova postura diante do próprio conhecimento e da aprendizagem. É objetivo deste trabalho, decorrente de investigações realizadas no espaço de atuação das autoras no Núcleo de Educação a Distância (NEAD) da Universidade de Caxias do Sul – Brasil e no Núcleo de Informática na Educação da Secretaria Municipal de Educação de Caxias do Sul- Brasil, envolvendo produção de material didático com a utilização de recursos midiáticos e formação de professores para EAD, apresentar uma reflexão sobre a necessidade de se repensarem as práticas docentes na atualidade a partir da análise das condições de acesso, sistematização e produção dessa nova forma de conhecer e aprender mediadas pelas TICs, tendo a educação a distância como uma modalidade que possibilita desencadear processos de mudança na postura de professores e alunos.
description: SOPCOM: Associação Portuguesa de Ciências da Comunicação, 2013: 8º SOPCOM: "Comunicação Global, Cultura e Tecnologia"
Physical characterization and origin of binary near-Earth asteroid (175706) 1996 FG3
Creators: name: Walsh, Kevin J.
name: Delbo, Marco
name: Mueller, Michael
name: Binzel, Richard P.
name: DeMeo, Francesca E.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: The near-Earth asteroid (NEA) (175706) 1996 FG3 is a particularly interesting spacecraft target: a binary asteroid with a low-DeltaV heliocentric orbit. The orbit of its satellite has provided valuable information about its mass density while its albedo and colors suggest it is primitive or part of the C-complex taxonomic grouping. We extend the physical characterization of this object with new observations of its emission at mid-Infrared (IR) wavelengths and with near-IR reflection spectroscopy. We derive an area-equivalent system diameter of 1.90 \pm 0.28 km (corresponding to approximate component diameters of 1.83 km and 0.51 km, respectively) and a geometric albedo of 0.039 \pm 0.012. 1996 FG3 was previously classified as a C-type asteroid, though the combined 0.4--2.5 micron spectrum with thermal correction indicates classification as B-type; both are consistent with the low measured albedo. Dynamical studies show that 1996 FG3 has most probably originated in the inner main asteroid belt. Recent work has suggested the inner Main Belt (142) Polana family as the possible origin of another low-DeltaV B-type NEA, (101955) 1999 RQ36. A similar origin for 1996 FG3 would require delivery by the overlapping Jupiter 7:2 and Mars 5:9 mean motion resonances rather than the nu-6 resonance, and we find this to be a low probability, but possible, origin.
description: Published in ApJ
Literacia sem barreiras: as histórias adaptadas
Creators: name: Grilo, Mariana
name: Catalão, Sara
name: Leonardo, Sara
Publisher: name: SOPCOM: Associação Portuguesa de Ciências da Comunicação
Year: 2013

description: Neste artigo, salientam-se os contributos da literacia na promoção do desenvolvimento infantil, focando a criança com perturbações severas da linguagem e da comunicação. Analisa-se a complementaridade entre comunicação aumentativa e alternativa, tecnologias de apoio e competências para aprender a ler e a escrever. Apresenta-se um exemplo de utilização de histórias adaptadas que pretende promover a comunicação, a literacia, o processo de ensino/aprendizagem e consequentemente, a inclusão e o desenvolvimento destas crianças.
description: SOPCOM: Associação Portuguesa de Ciências da Comunicação, 2013: 8º SOPCOM: "Comunicação Global, Cultura e Tecnologia"
Optimizing the Recovery of Fisher Information in the Dark Matter Power Spectrum
Creators: name: Harnois-Deraps, Joachim
name: Yu, Hao-Ran
name: Zhang, Tong-Jie
name: Pen, Ue-Li
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We combine two Gaussianization techniques - Wavelet Non-Linear Wiener Filter (WNLWF) and density reconstruction - to quantify the recovery of Fisher information that is lost in the gravitational collapse. We compute a displacement fields, in analogy with the Zel'dovich approximation, and apply a Wavelet Non-Linear Wiener Filter that decomposes the reconstructed density fields into a Gaussian and a non-Gaussian component. From a series of 200 realizations of N-body simulations, we compute the recovery performance for density fields obtained with both dark matter particles and haloes. We find that the height of the Fisher information trans-linear plateau is increased by more than an order of magnitude at k > 1.0h/Mpc for particles, whereas either technique alone offers an individual recovery boost of only a factor of three to five. We conclude that these two techniques work in a symbiosis, as their combined performance is stronger than the sum of their individual contribution. When applied to the halo catalogues, we find that the reconstruction has only a weak effect on the recovery of Fisher Information, while the non-linear wavelet filter boosts the information by about a factor offive. We also observe that non-Gaussian Poisson noise saturates the Fisher information, and that shot noise subtracted measurements exhibit a milder information recovery.
description: 11 pages, 6 figures
INTEGRATING ARTIFICIAL INTELLIGENCE IN IT CURRICULA, PREPARING STUDENTS FOR THE FUTURE OF TECHNOLOGY
Creators: name: Mukhtarov, Farrukh
Publisher: name: Zenodo
Year: 2023

description: Artificial intelligence (AI) is playing an increasingly important role in the IT industry, and it is essential that IT curricula are updated to reflect this change. This article discusses the importance of integrating AI into IT education, and provides some practical strategies for doing so.
Identifying the Impact of Injury Definition and Training Load on the Study of Jumper’s Knee
Creators: name: MacDonald, Kerry
Publisher: name: Graduate Studies
Year: 2016
Subjects: subject: Epidemiology
subject: injury prevention
subject: Sport Injury
subject: Jumper's Knee
subject: Tendinopathy
subject: Volleyball

description: With a growing body of research into volleyball injuries we are beginning to understand potential risk factors for the most prevalent injuries. Volleyball has been found to have more overuse than acute injuries, yet the majority of research to date has failed to utilize an injury definition sensitive enough to capture the true frequency and burden of overuse problems. Furthermore, the mechanism of overuse injuries is believed to be a chronic overloading of tissue, in combination with an incomplete healing process. With advancements in technology, it is now possible to accurately and efficiently measure these loads which, in turn, could have significant impact on injury prevention. Previously identified risk factors were assessed with the purpose of developing a sport-specific screening program. The impact of injury definition on the data collection for overuse injuries was also examined. This analysis evaluation confirmed the need to use specific overuse injury definitions, with an improved sensitivity for the capture of overuse injury frequency and burden compared to more conventional time-loss definitions. An assessment of known risk factors, including a measure of jumping load, was completed with the more sensitive overuse injury capture. Although no risk factor was found to significantly predict injury outcome, several methodological challenges were identified. This research demonstrates that traditional assessment techniques that have been used for time-loss injuries are not sufficient for overuse injury capture and analyses. The contribution of this dissertation to the literature is the demonstration that the methods presented can more accurately capture the injury burden and record the specific load metrics for that injury. However, further advancements in statistical analysis for prevalence measures of injury are required to assess dynamic risk factors, including measures of load, for overuse injuries.
Kinetic modelling of epitaxial film growth with up- and downward step barriers
Creators: name: Leal, F. F.
name: Oliveira, T. J.
name: Ferreira, S. C.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The formation of three-dimensional structures during the epitaxial growth of films is associated to the reflection of diffusing particles in descending terraces due to the presence of the so-called Ehrlich-Schwoebel (ES) barrier. We generalize this concept in a solid-on-solid growth model, in which a barrier dependent on the particle coordination (number of lateral bonds) exists whenever the particle performs an interlayer diffusion. The rules do not distinguish explicitly if the particle is executing a descending or an ascending interlayer diffusion. We show that the usual model, with a step barrier in descending steps, produces spurious, columnar, and highly unstable morphologies if the growth temperature is varied in a usual range of mound formation experiments. Our model generates well-behaved mounded morphologies for the same ES barriers that produce anomalous morphologies in the standard model. Moreover, mounds are also obtained when the step barrier has an equal value for all particles independently if they are free or bonded. Kinetic roughening is observed at long times, when the surface roughness w and the characteristic length $ξ$ scale as $w ~ t^β$ and $ξ~ t^ζ$ where $β\approx 0.31$ and $ζ\approx 0.22$, independently of the growth temperature.
description: 15 pages, 7 figures
Characterization and Control of Halophilic Sulfate-Reducing and Methanogenic Microbial Communities in Shale Oil and Gas Systems
Creators: name: An, Biwen Annie
Publisher: name: Graduate Studies
Year: 2017
Subjects: subject: Microbiology
subject: FOS: Biological sciences
subject: Environment
subject: Microbiology
subject: Petroleum
subject: Sulfur
subject: Methanogenesis
subject: Corrosion

description: In recent years, the oil and gas industry has been revolutionized by the expansion of shale oil and shale gas operations due to the advancement of hydraulic fracturing and high economic benefits compared to other unconventional resources. Several mechanisms have been proposed for the possible roles of microorganisms in shale gas fields. However, there remains a lack of knowledge regarding the key microbial players shared by all shale reservoirs and their involvements in the operations. Three case studies were conducted using samples obtained from various shale oil and shale gas reservoirs on the possibility of reservoir souring, microbiologically influenced corrosion (MIC) and microbially enhanced oil recovery (MEOR) through both culture-dependent and independent approaches. Case study I, for the Bakken shale oil field in Saskatchewan Canada, showed that continuous injection of low salinity source water can alter the microbial and geochemical conditions of the reservoir. There is a dominance of halophilic microbial community in the saline shale formations, in which Halanaerobium can synthesize the substrates used by halophilic sulfate-reducing bacteria (SRB) for sulfate-reduction, and halophilic nitrate-reducing bacteria (NRB) can inhibit the growth of SRB through nitrite production. At low salinity, the microbial community is much more diverse involving Halanaerobium, Desulfovibrio, Thiomicrospira, Dethiosulfatibacter and Arcobacter, with high potential for souring and MIC. In addition, at low salinity, nitrate-mediated souring control cannot be as easily achieved as nitrite is further reduced to N2. Case studies II and III were for the Duvernay shale gas field and Montney shale oil field in Alberta, Canada, which showed high MIC potential involving similar halophilic taxa as found in the Bakken field. Finally, samples from all three case studies indicated higher salinities were associated with higher ammonium concentrations, which is a product of methylotrophic methanogenesis using methylamines. The addition of methylamines in the hydraulic fracturing process can facilitate the possible interactions between the key players identified in all three case studies. Through this work, mitigation and monitoring technologies targeting recurring taxa involved in shale reservoirs on souring and MIC can be developed, which is highly beneficial for the environment and the economy.
A first-principles investigation on the effects of magnetism on the Bain transformation of $α$-phase FeNi systems
Creators: name: Rahman, Gul
name: Kim, In Gee
name: Bhadeshia, H. K. D. H.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The effects of magnetism on the Bain transformation of $α$-phase FeNi systems are investigated by using the full potential linearized augmented plane wave (FLAPW) method based on the generalized gradient approximation (GGA). We found that Ni impurity in bcc Fe increases the lattice constant in ferromagnetic (FM) states, but not in the nonmagnetic (NM) states. The shear modulus $G$ and Young's modulus $E$ of bcc Fe are also increased by raising the concentration of nickel. All the compositions considered show high shear anisotropy and the ratio of the bulk to shear modulus is greater than 1.75 implying ductility. The mean sound velocities in the $[100]$ directions are greater than in the $[110]$ directions. The Bain transformation, which is a component of martensitic transformation, has also been studied to reveal that Ni$_{x}$Fe$_{1-x}$ alloys are elastically unstable in the NM states, but not so in the FM states. The electronic structures explain these results in terms of the density of states at the Fermi level. It is evident that magnetism cannot be neglected when dealing with the Bain transformation in iron and its alloys.
description: Accepted for publications in J. Appl. Phys. (2012)
A Visão na ponta dos dedos: o desafio dos novos recursos tecnológicos móveis na aprendizagem das crianças cegas
Creators: name: Sousa, Iolanda
name: Guerreiro, Lurdes
name: Lourenço, Rosário
Publisher: name: SOPCOM: Associação Portuguesa de Ciências da Comunicação
Year: 2013

description: Relacionando conceitos como os de comunicabilidade, sociabilidade, individualidade, autonomia, deficiência, perceções, ritmos de aprendizagem, competências, integração, entre outros, neste estudo consubstancializa-se a potencialidade sociocognitiva da criança cega com o paradoxo da interpretação do “diferente” por uma sociedade construída de e para pessoas escorreitas, num continuum de educação tiflo-socio-comunicacional. Correlacionando a tiflologia com as estratégias da infoinclusão, com o acesso aos recentes recursos tecnológicos móveis, perspetiva-se assegurar às crianças cegas o acesso à informação através do estímulo às suas competências literárias promovendo a garantia da igualdade de oportunidades. Com recurso aos sentidos remanescentes que envolvem as perceções não visuais, como a audição, o tato ou sistema háptico, a cinestesia, a memória muscular e o sentido vestibular, numa ótica integradora e inclusiva é apresentada a dinamização de um protótipo de software de introdução ao braille.
description: SOPCOM: Associação Portuguesa de Ciências da Comunicação, 2013: 8º SOPCOM: "Comunicação Global, Cultura e Tecnologia"
MPEC 2023-X55 : 2023 XT
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2023
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469
subject: 2023 XT

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.