cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Genomic variation and evolution of Helicobacter pylori in Cape Verde
Creators: name: Tam, Yi Ling
Publisher: name: University of Leicester
Year: 2021
Subjects: Uncategorized

description: Helicobacter pylori (H. pylori) are humans’ stomach-dwelling bacteria that pose high mutation and recombination rates. These features allow them to achieve great genetic diversity and adapt to a wide range of within-host environments with different selective pressures, including presence of antibiotics. This study focused on the H. pylori population in Cape Verde, an archipelago that was first inhabited in the 15th century by Portuguese colonists and African slaves, followed by their extensive admixture. The high prevalence of H. pylori infection and crowded living environment facilitate cross infection and genetic exchange between divergent strains, which promote rapid evolution of the bacteria. This thesis aimed to study between-host and within-host genomic variation and evolution of H. pylori from asymptomatic individuals in Cape Verde. The genetic architecture and evolution of antibiotic resistance of H. pylori in Cape Verde were also investigated.Population genetic analyses based on whole genome data discovered that the main axis of genetic variation of H. pylori in Cape Verde was not due to admixture as in their hosts, but presence of four populations groups, two of which were highly differentiated from African and European ancestral strains and were likely to represent recent clonal expansions. Evidence of within-host genetic exchange through recombination was found between strains within-host, regardless of the presence of multiple strains, the presence of mixed ancestry and the ancestry/ancestry combinations. Resistance mechanisms of four antibiotics (Amoxicillin, Clarithromycin, Metronidazole and Tetracycline) of H. pylori in Cape Verde were only partially explained by known resistance-associated mutations. Significantly associated variants identified using GWASs included both established and novel variants.The understanding of this H. pylori population from asymptomatic hosts will serve as a major step towards establishment of Cape Verde as a model population for studying co-evolutionary trajectories of human hosts and bacteria.
E-learning e as redes sociais
Creators: name: Alves, Bruno
name: Dias, Rui
Publisher: name: Internet Latent Corpus Journal
Year: 2011

description: As plataformas de e-learning ou Sistemas de Gestão da aprendizagem são uma realidade atual e emergente no mundo da educação e no contexto atual da Sociedade da Informação. Este trabalho de investigação tem como principais objetivos perceber a relação entre as mesmas e o fenómeno das redes sociais. Para isso foi efetuado um inquérito a utilizadores dos dois contextos para estabelecer uma ponte entre as funcionalidades das mesmas e as atividades realizadas nas redes sociais existentes. Apresenta ainda algumas perspetivas futuras do campo da educação e da integração das novas tecnologias nestas áreas como ferramentas agregadoras e desenvolvedoras dos processos de ensino, bem como da necessidade de reequacionar os aspetos fundamentais da educação desde os planos curriculares, à criação de objetivos de ensino individualizados.
description: Internet Latent Corpus Journal, vol. 2 n.º 1 (2011)
Twitter e a campanha eleitoral portuguesa
Creators: name: Faria, Fernando M.
name: Branquinho, Hugo J.
name: Silva, João F.
Publisher: name: Internet Latent Corpus Journal
Year: 2011

description: A campanha eleitoral para as legislativas em Portugal sofreu uma mudança de paradigma face à tradicional estratégia de angariação de votos. A utilização dos novos media para atingir novo público foi durante toda a campanha uma constante, e os serviços de redes sociais, blogs e ferramentas de microblogging não foram excepção. O Twitter foi invadido pelos principais partidos portugueses, de forma a trocar ideias, influenciar ou ganhar votos dos jovens portugueses, que cada vez mais estão desinteressados da política. Este trabalho pretende apurar a interferência dos seguidores nos novos media co-participativos na perspectiva dos diferentes movimentos partidários, tendo em conta o seu nível de integração, informação e motivação no envolvimento com os vários partidos, procurando verificar consistência nos resultados. O artigo apresenta a panorâmica envolvente da rede social Twitter e as respectivas interacções dos eleitores e líderes partidários demonstrando toda a dinâmica da campanha. Finalmente, é abordado o estudo de caso da campanha eleitoral portuguesa sendo apresentadas perguntas de investigação, metodologia adoptada e respectivas conclusões.
description: Internet Latent Corpus Journal, vol. 2 n.º 1 (2011)
Neoperla ignacsiveci Li & Li, 2013, nom nov.
Creators: name: Li, Weihai
name: Li, Xiangping
Publisher: name: Zenodo
Year: 2013
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Plecoptera
Perlidae
Neoperla
Neoperla ignacsiveci

description: Neoperla ignacsiveci nom nov. Neoperla siveci Li and Li 2013: 75. Preoccupied by N. siveci Zwick 1980 in Zwick & Sivec, 1980:125. Material examined. Holotype ♂, China, Taiwan, Pingdong, Mudan, Shimen Village, 8 November 2010, Yang Ding (CAU). Paratype: Same data as holotype, 1♂ (HIST). Etymology. The new name remains in honor of Dr. Ignac Sivec.
description: Published as part of Li, Weihai & Li, Xiangping, 2013, A Replacement Name For Neoperla Siveci Li And Li (Plecoptera: Perlidae), pp. 9 in Illiesia 9 (9) on page 9, DOI: 10.5281/zenodo.4758267
description: {"references": ["Li, W. H. and X. P., Li. 2013. A new species of the genus Neoperla (Plecoptera: Perlidae) from China. Acta Zootaxonomica Sinica, 38: 75 - 77.", "Zwick, P. & I. Sivec. 1980. Beitrage zur Kenntnis der Plecoptera des Himalaja. Entomologica Basiliensia, 5: 59 - 138."]}
Caracterização do uso do YouTube pelas Instituições Universitárias: estudo de caso das práticas da Universidade de Harvard e do Departamento de Comunicação da Universidade do Minho
Creators: name: Figueiredo, Cátia
name: Moita, Marília
name: Rodrigues, Rui
Publisher: name: Internet Latent Corpus Journal
Year: 2011

description: Atualmente, verifica-se a inclusão de ferramentas Web 2.0, como o YouTube, nos processos educativos, sendo um dos sinais de uma mudança no paradigma de ensino, assim como revelando processos inerentes à troca de conhecimento e informação entre redes sociais virtuais. Os conteúdos trocados através destas ferramentas são potenciais veículos da ideologia e visão das instituições que os difundem. O presente artigo aborda as práticas de utilização do YouTube em contexto universitário, efetuando-se um estudo de caso dos canais da Universidade de Harvard e do Departamento de Comunicação da Universidade do Minho. Para o efeito, é feita uma análise qualitativa e quantitativa dos conteúdos presentes nos dois canais das universidades mencionadas, nomeadamente os seus vídeos e respetivos comentários. Após recolhidos e analisados os dados, quantitativamente, conclui-se que Harvard faz uma utilização mais intensiva do canal, apresentando um maior número de vídeos, visualizações e comentários no canal. Qualitativamente, foram recolhidas evidências que permitem distinguir as instituições em duas ideologias: Harvard, com uma ideologia tradicional, e o Departamento de Comunicação da Universidade do Minho com uma ideologia moderna.
description: Internet Latent Corpus Journal, vol. 2 n.º 1 (2011)
Persistente Identifikatoren für Open Science: re3data
Creators: name: Ulrich, Robert
Publisher: name: Zenodo
Year: 2020
Subjects: ORCID
Open Researcher and Contributor ID
ORCID DE
Autorenidentifikation
PID
Persistent Identifier
Open Science

description: "Persistente Identifikatoren für Open Science" - Workshop auf den Open-Access-Tagen 2020 am Mittwoch, 16. September 2020, von 9:15–10:45 Uhr; Organisiert von ORCID DE und ORCID. Impulsvortrag 6
Optical Flux and Colour Variability of Blazars in the ZTF Survey
Creators: name: Negi, Vibhore
name: Joshi, Ravi
name: Chand, Krishan
name: Chand, Hum
name: Wiita, Paul
name: Ho, Luis C.
name: Singh, Ravi S.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We investigate the temporal and colour variability of 897 blazars, comprising 455 BL Lacertae objects (BL Lacs) and 442 Flat Spectrum Radio Quasars (FSRQs), selected from the Roma-BZCAT catalogue, using the multi-band light curves from the Zwicky Transient Facility (ZTF DR6) survey. Assessing the colour variability characteristics over ~2 year timescales, we found that 18.5 per cent (84 out of 455) BL Lacs showed a stronger bluer when brighter (BWB) trend, whereas 9.0 per cent (41 out of 455) showed a redder when brighter (RWB) trend. The majority (70 per cent) of the BL Lacs showing RWB are host galaxy dominated. For the FSRQ subclass, 10.2 per cent (45 out of 442) objects showed a strong BWB trend and 17.6 per cent (78 out of 442) showed a strong RWB trend. Hence we find that BL Lacs more commonly follow a BWB trend than do FSRQs. This can be attributed to the more dominant jet emission in the case of BL Lacs and the contribution of thermal emission from the accretion disc for FSRQs. In analysing the colour behaviour on shorter time windows, we find many blazars evince shorter partial trends of BWB or RWB nature (or occasionally both). Some of such complex colour behaviours observed in the colour-magnitude diagrams of the blazars may result from transitions between the jet-dominated state to the disc-dominated state and vice versa.
description: Accepted for publication in MNRAS
The role of environment in the morphological transformation of galaxies in 9 intermediate redshift clusters
Creators: name: Huertas-Company, M.
name: Foex, G.
name: Soucail, G.
name: Pello, R.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: [abridged] We analyze a sample of 9 massive clusters at 0.49.5). We find that the red sequence is already in place at z~0.5 and it is mainly composed of very massive (log(M/Msol)>11.3) early-type galaxies. These massive galaxies seem to be already formed when they enter the cluster, probably in infalling groups, since the fraction remains constant with the cluster radius. Their presence in the cluster center could be explained by a segregation effect reflecting an early assembly history. Any evolution that takes place in the galaxy cluster population occurs therefore at lower masses (10.3
description: A&A in press
Identifying the Relationship between Seasonal Variation in Residential Load and Socioeconomic Characteristics
Creators: name: Wang, Zhenyu
name: Wang, Hao
Publisher: name: arXiv
Year: 2021
Subjects: subject: Applications (stat.AP)
subject: FOS: Computer and information sciences

description: Smart meter data analysis can provide insights into residential electricity consumption behaviors. Seasonal variation in consumption is not well understood but yet important to utilities for energy pricing and services. This paper aims to develop a methodology to measure seasonal variations in load patterns and identify the relationship between seasonal variation and socioeconomic factors, as socioeconomic characteristics often have great explanatory power on electricity consumption behaviors. We first model the seasonal load patterns using a two-stage K-Medoids clustering and evaluate the relative entropy of the load pattern distributions between seasons. Then we develop decision tree classifiers for each season to analyze the importance of different socioeconomic characteristics factors. Taking real-world data as a case study, we find that income level is an essential factor influencing the pattern variation across all seasons. The number of children and the elderly is also a significant factor for certain seasonal changes.
description: The 8th ACM International Conference on Systems for Energy-Efficient Buildings, Cities, and Transportation (BuildSys '21)
Divulgação de conteúdos audiovisuais no Youtube como alternativa a outros suportes
Creators: name: Coelho, Pedro
name: Oliveira, Rui
Publisher: name: Internet Latent Corpus Journal
Year: 2011

description: A crescente adesão de público para a visualização de conteúdos audiovisuais na Internet obrigou os produtores desses mesmos conteúdos a adaptarem-se a esta nova realidade, procurando criar espaços próprios na Internet para que possam manter-se em contacto com o seu público. O objetivo deste estudo consiste em perceber de que forma se tem dado esta adaptação, que novas fórmulas foram descobertas pelos produtores e quais as características dos seus espaços na Internet, mais concretamente, os seus canais na plataforma de partilha de vídeo Youtube. Para responder a estas questões foram analisados os canais do Youtube de quatro produtores de referência a nível nacional e interna: BBC Worldwide, CNN, X Factor e RTP.
description: Internet Latent Corpus Journal, vol. 2 n.º 1 (2011)
title: November : Regular + Sustainability in Smart Cities - Part 2 (Hybrid)
Creators: name: Benson Chen
name: Lily Chen
name: Gil Huang
name: Yu-Tien Cheng
name: Ruby Yao A. Sujaatha
name: Malini M
name: Pradeepa RR Pamila
name: Ajith Kumar M
name: Ramesh Aravinth R
name: Sanjay VYu Wang
name: Junhua Wu
name: and Zhanlian Li
Publisher: name: IEEE
Year: 2023

description: Newsletter
description:
This is a special issue of the Smart Cities eNewsletter featuring "Smart Warehousing of Automotive Parts and Accessories Inventory Control and Management", "Utilization of Waste Rubber Tires in the Subbase Course of Road", "Smart Water Quality Monitoring System Using IoT" and "Introduction to the Common Information Model (CIM) and Standardisation"
Nonparametric Estimation of Large Spot Volatility Matrices for High-Frequency Financial Data
Creators: name: Bu, Ruijun
name: Li, Degui
name: Linton, Oliver
name: Wang, Hanchao
Publisher: name: arXiv
Year: 2023
Subjects: subject: Econometrics (econ.EM)
subject: Methodology (stat.ME)
subject: FOS: Economics and business
subject: FOS: Computer and information sciences

description: In this paper, we consider estimating spot/instantaneous volatility matrices of high-frequency data collected for a large number of assets. We first combine classic nonparametric kernel-based smoothing with a generalised shrinkage technique in the matrix estimation for noise-free data under a uniform sparsity assumption, a natural extension of the approximate sparsity commonly used in the literature. The uniform consistency property is derived for the proposed spot volatility matrix estimator with convergence rates comparable to the optimal minimax one. For the high-frequency data contaminated by microstructure noise, we introduce a localised pre-averaging estimation method that reduces the effective magnitude of the noise. We then use the estimation tool developed in the noise-free scenario, and derive the uniform convergence rates for the developed spot volatility matrix estimator. We further combine the kernel smoothing with the shrinkage technique to estimate the time-varying volatility matrix of the high-dimensional noise vector. In addition, we consider large spot volatility matrix estimation in time-varying factor models with observable risk factors and derive the uniform convergence property. We provide numerical studies including simulation and empirical application to examine the performance of the proposed estimation methods in finite samples.
Beam oscillations and curling in chirped periodic structures with metamaterials
Creators: name: Davoyan, A. R.
name: Sukhorukov, A. A.
name: Shadrivov, I. V.
name: Kivshar, Yu. S.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We study the propagation of electromagnetic waves in one-dimensional chirped periodic structures composed of alternating layers of negative-index (or left-handed) metamaterial and conventional dielectric, under the condition of the zero average refractive index. We consider the case when the periodic structure has a linear chirp, and the chirp is introduced by varying linearly the thickness of the layers across the structure. We apply an asymptotic analytical method for the analysis of the Bloch oscillations and find that, in a sharp contrast to ordinary periodic dielectric structures, the energy flow in multi-layered stacks with metamaterials may have the opposite direction at the band edges, thus providing novel possibilities for the beam steering in the transmission band.
description: 9 pages, 7 figures
A Feedback Integrated Web-Based Multi-Criteria Group Decision Support Model for Contractor Selection using Fuzzy Analytic Hierarchy Process
Creators: name: Afolayan, Abimbola Helen
name: Ojokoh, Bolanle Adefowoke
name: Adetunmbi, Adebayo
Publisher: name: arXiv
Year: 2021
Subjects: subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: In this paper, a feedback integrated multi-criteria group decision support model for contractor selection was proposed.
description: 20 pages, 2 figures
Empresas no Facebook: o caso da TMN e da Optimus
Creators: name: Caseiro, Bruno
name: Barbosa, Rui
Publisher: name: Internet Latent Corpus Journal
Year: 2011

description: O conceito de Social Media Marketing é atualmente aplicado por diversas empresas, como forma de garantir uma maior presença online e assim estarem mais próximas das crescentes comunidades virtuais, onde se encontram muitos dos seus já clientes e também uma grande quantidade de potenciais clientes. Um dos objetivos deste estudo consiste em avaliar as estratégias de comunicação de duas marcas de prestígio em Portugal, procurando conhecer de que forma divulgam os seus produtos, de que forma tentam conquistar novos clientes ou melhorar as suas redes de relacionamentos. Outra das propostas deste estudo é compreender e comparar o aproveitamento dos media sociais, a partir do estudo específico de uma destas plataformas, o Facebook, relativamente a duas operadores de telecomunicações móveis nacionais, a TMN e a Optimus. Para este efeito, desenvolveu-se uma análise quantitativa e qualitativa das interações presentes nas páginas de perfil de cada uma destas marcas, no Facebook. Os resultados obtidos revelam uma disparidade no grau de interação presente em cada uma das marcas, indiciando diferentes estratégias. O primeiro caso revela uma abordagem considerada errada pelos estudiosos do tema, enquanto a segunda constitui um exemplo de uma boa prática de social media marketing.
description: Internet Latent Corpus Journal, vol. 2 n.º 1 (2011)
Formular questões de investigação no contexto do corpus latente na internet
Creators: name: Souza, Francislê Neri De
name: Souza, Dayse Neri De
Publisher: name: Internet Latent Corpus Journal
Year: 2011

description: A questão de investigação é o primeiro e vital passo do processo de investigação. Para Lewis & Pamela (1987) uma questão de investigação é aquela que explicita precisamente a área de investigação. Para enfatizar, consideramos que a questão é, ou as questões de investigação são a “metade do trabalho” de um cientista. Um cientista é aquele que sabe formular questões interessantes e profundas sobre sua área de trabalho e estabelecer relações com outras áreas e com o mundo. As questões de investigação são os guias que orientam o tipo de informação necessária, como a recolha de informação deve ser feita e define a abrangência do corpus de dados para a resolução de um problema. (...)
description: Internet Latent Corpus Journal, vol. 2 n.º 1 (2011)
Results from 2+1 flavours of SLiNC fermions
Creators: name: Bietenholz, W.
name: Bornyakov, V.
name: Cundy, N.
name: Göckeler, M.
name: Horsley, R.
name: Kennedy, A. D.
name: Nakamura, Y.
name: Perlt, H.
name: Pleiter, D.
name: Rakow, P. E. L.
name: Schäfer, A.
name: Schierholz, G.
name: Schiller, A.
name: Stüben, H.
name: Zanotti, J. M.
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: QCD results are presented for a 2+1 flavour fermion clover action (which we call the SLiNC action). A method of tuning the quark masses to their physical values is discussed. In this method the singlet quark mass is kept fixed, which solves the problem of different renormalisations (for singlet and non-singlet quark masses) occuring for non-chirally invariant lattice fermions. This procedure enables a wide range of quark masses to be probed, including the case with a heavy up-down quark mass and light strange quark mass. Preliminary results show the correct splittings for the baryon (octet and) decuplet spectrum.
description: 7 pages; talk given at the XXVII International Symposium on Lattice Field Theory, July 26-31 2009, Peking University, Beijing, China
title: Ninety-Nine and One-Half
Creators: name: Williamson, Deborah R.
Publisher: name: Old Dominion University Libraries
Year: 1991

description: Ninety-nine and One-half is a novella about a young man's journey from self-doubt to self-revelation which parallels his physical journey from a coma to an awakening. In twenty spare chapters the memories of his life before the coma are intertwined with the actions of his family and friends after he becomes comatose. Through the young man's memories and the reflections about him by the other characters, the reader sees what has led the young man to an almost fatal indecision. The resolution of the novella comes when the young man adequately distances himself from the guilt, fear, and unhappiness that restrained him in life before the coma and then chooses to master his fate.
Utilização do Twitter pelos meios de comunicação portugueses
Creators: name: Nobre, Carlos
name: Magalhães, Ricardo
Publisher: name: Internet Latent Corpus Journal
Year: 2010

description: A ferramenta online de micro-blogging Twitter consiste essencialmente numa plataforma de comunicação rápida, que permite aos seus utilizadores receber instantaneamente pequenas actualizações textuais por parte da sua comunidade. À semelhança do que aconteceu com os blogs nos últimos anos, os micro-blogs estão a ser alvo de adopção em massa por parte da imprensa noticiosa, seja qual for o seu meio de difusão original. O Twitter é a ferramenta favorita para este fenómeno, que possui o seu próprio modelo e metodologia de interacção, diferindo dos blogs convencionais. O presente estudo pretende analisar os métodos de utilização desta ferramenta por parte da imprensa escrita, os canais de televisão e rádios Portuguesas, para compreender as suas intenções de uso e interacção para com o seu público, comparando estas tendências pelos diferentes tipos de media analisados. Com base nos resultados, é possível observar que salvo algumas excepções, os media vêem o micro-blogging como apenas mais um canal de difusão de conteúdo noticioso, ignorando as suas potencialidades de bidirecionalidade comunicacional. A Televisão é o meio que mais aposta na interacção directa com o seu público, dando um uso razoavelmente significativo ao micro-blogging enquanto ferramenta de comunicação da Web 2.0.
description: Internet Latent Corpus Journal, vol. 1 n.º 1 (2010)
Sub-shot-noise quantum metrology with entangled identical particles
Creators: name: Benatti, F.
name: Floreanini, R.
name: Marzolino, U.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Quantum Physics (quant-ph)
subject: Other Condensed Matter (cond-mat.other)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The usual notion of separability has to be reconsidered when applied to states describing identical particles. A definition of separability not related to any a priori Hilbert space tensor product structure is needed: this can be given in terms of commuting subalgebras of observables. Accordingly, the results concerning the use of the quantum Fisher information in quantum metrology are generalized and physically reinterpreted.
description: 17 pages, LaTeX
Giant topological Hall effect in centrosymmetric tetragonal Mn2-xZnxSb
Creators: name: Nabi, Md Rafique Un
name: Wegner, Aaron
name: Wang, Fei
name: Zhu, Yanglin
name: Guan, Yingdong
name: Fereidouni, Arash
name: Pandey, Krishna
name: Basnet, Rabindra
name: Acharya, Gokul
name: Churchill, Hugh O. H.
name: Mao, Zhiqiang
name: Hu, Jin
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Topological magnetism typically appears in noncentrosymmetric compounds or compounds with geometric frustration. Here we report the effective tuning of magnetism in centrosymmetric tetragonal Mn2-xZnxSb by Zn substitution. The magnetism is found to be closely coupled to the transport properties, giving rise to to a very large topological hall effect is possibly associated with topological magnetism. Our finding suggests Mn2-xZnxSb is a candidate material for the centrosymmetric tetragonal topological magnetic system, offers opportunities for studying and tuning spin textures and developing near room temperature spin-based devices.
description: 15 pages, 4 Figures and already published in Physical Review B
Status quo and perspective of re3data
Creators: name: Vierkant, Paul
name: Pampel, Heinz
name: Elger, Kirsten
name: Kindling, Maxi
name: Ulrich, Robert
name: Witt, Michael
name: Fenner, Martin
Publisher: name: Zenodo
Year: 2018
Subjects: re3data
research data repository
registry
research data management
research data

description: This presentation about the status quo and perspective of re3data was given at the MERIL-2 Interoperability Workshop, 2018-06-25 in Athens.
description: {"references": ["Pampel H, Vierkant P, Scholze F, Bertelmann R, Kindling M, Klump J, et al. (2013) Making Research Data Repositories Visible: The re3data.org Registry. PLoS ONE8(11): e78080. https://doi.org/10.1371/journal.pone.0078080", "Kindling, M., Pampel, H., van de Sandt, S., R\u00fccknagel, J., Vierkant, P., Kloska, G., Witt, M., Schirmbacher, P., Bertelmann, R., Scholze, F. (2017): The Landscape of Research Data Repositories in 2015: A re3data Analysis. - D-Lib Magazine, 23, 3/4. http://doi.org/10.1045/march2017-kindling"]}
Utilização de ferramentas e serviços Web para realização de teletrabalho colaborativo no contexto académico
Creators: name: Cerdeira, Frederico
name: Braz, Jorge
name: Nobre, Vanessa
Publisher: name: Internet Latent Corpus Journal
Year: 2010

description: Com o desenvolvimento das tecnologias e serviços assentes na Web e com a proliferação das premissas da Web social, estimula-se a participação colaborativa entre os utilizadores. Este suporte à colaboração permite que sejam facilitadas práticas de teletrabalho em diversos contextos, inclusive no ambiente académico. O presente estudo incide sobre as práticas de teletrabalho colaborativo que os alunos de Ciências e Tecnologias da Comunicação da Universidade de Aveiro adoptam no contexto académico, nomeadamente, na realização de trabalhos de grupo à distância. Foi feito um levantamento teórico sobre o tema do teletrabalho e sobre as tecnologias de comunicação que potenciam o teletrabalho colaborativo. Este levantamento facilita a compreensão das temáticas associadas e identifica alguns investigadores envolvidos. O estudo envolveu também uma recolha de dados através de inquérito por questionário onde se procedeu a uma análise quantitativa e qualitativa da informação recolhida. A análise de dados permitiu aferir um conjunto de funcionalidades pertinentes a qualquer serviço de suporte ao teletrabalho colaborativo em contexto académico. Salientaram-se as limitações das actuais soluções, confirmando a carência de plataformas agregadoras que permitam usufruir das dinâmicas sociais das redes Web e, simultaneamente, assegurar a gestão controlada dos projectos colaborativos entre utilizadores de serviços ou ferramentas independentes.
description: Internet Latent Corpus Journal, vol. 1 n.º 1 (2010)
His sleep at Elsinore
Creators: name: McGinniss, James Barry
Publisher: name: University of British Columbia
Year: 2011

description: The poems included in this thesis pay homage to John Dowland (1562-1626), the Elizabethan lutenist and composer, to whose music the King of Denmark's court once danced. The poems in general address themselves to those moments when people decide to dance and sing and attempt a reconciliation between activity and sleep, allowing the past and the present to swim in one voice. Both the poems and the fiction give expression to that special force which is exerted on the moment by the past.
Investigating quantum transport with an initial value representation of the semiclassical propagator
Creators: name: Goletz, Christoph-Marian
name: Grossmann, Frank
name: Tomsovic, Steven
Publisher: name: arXiv
Year: 2009
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Quantized systems whose underlying classical dynamics possess an elaborate mixture of regular and chaotic motion can exhibit rather subtle long-time quantum transport phenomena. In a short wavelength regime where semiclassical theories are most relevant, such transport phenomena, being quintessentially interference based, are difficult to understand with the system's specific long-time classical dynamics. Fortunately, semiclassical methods applied to wave packet propagation can provide a natural approach to understanding the connections, even though they are known to break down progressively as time increases. This is due to the fact that some long-time transport properties can be deduced from intermediate-time behavior. Thus, these methods need only retain validity and be carried out on much shorter time scales than the transport phenomena themselves in order to be valuable. The initial value representation of the semiclassical propagator of Herman and Kluk [M. F. Herman and E. Kluk, Chem. Phys. 91, 27 (1984)] is heavily used in a number of molecular and atomic physics contexts, and is of interest here. It is known to be increasingly challenging to implement as the underlying classical chaos strengthens, and we ask whether it is possible to implement it well enough to extract the kind of intermediate time information that reflects wave packet localization at long times. Using a system of two coupled quartic oscillators, we focus on the localizing effects of transport barriers formed by stable and unstable manifolds in the chaotic sea and show that these effects can be captured with the Herman-Kluk propagator.
description: 8 figures
Vídeos promocionais das Universidades no YouTube
Creators: name: Silva, Inês M.
name: Martins, Samuel F.
name: Oliveira, Teresa C.
Publisher: name: Internet Latent Corpus Journal
Year: 2010

description: A presença das Instituições de Ensino Superior (IES) na Internet tem vindo a aumentar com o desenvolvimento das novas tecnologias. Além da informação e disponibilização de serviços, a recente expansão do vídeo online revela-se uma boa oportunidade de divulgação das instituições a nível global. Este estudo pretende analisar a vertente audiovisual dos conteúdos de divulgação das IES com presença online, mais concretamente, da disponibilização dos seus vídeos promocionais na plataforma de vídeo online YouTube. A análise incide sobre as cinco melhores Universidades a nível mundial, europeu e português. Com este estudo pretende-se identificar as características técnicas e comunicacionais dominantes desses vídeos e considerar também a interacção gerada em torno dos mesmos. Para isso, procedeu-se a uma análise quantitativa e qualitativa e posterior cruzamento dos dados, referentes ao conteúdo e estrutura dos vídeos, onde se evidenciou, a dominância da presença de vídeos promocionais das cinco melhores Universidades europeias. Relativamente aos cuidados a nível de produção audiovisual, destaca-se o facto dos vídeos analisados obedecerem a uma grande parte das características de produção de vídeo institucional e de produção específica para Web.
description: Internet Latent Corpus Journal, vol. 1 n.º 1 (2010)
Relativistic Broadening of Iron Emission Lines in a Sample of AGN
Creators: name: Brenneman, Laura W.
name: Reynolds, Christopher S.
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We present a uniform X-ray spectral analysis of eight type-1 active galactic nuclei (AGN) that have been previously observed with relativistically broadened iron emission lines. Utilizing data from the XMM-Newton European Photon Imaging Camera (EPIC-pn) we carefully model the spectral continuum, taking complex intrinsic absorption and emission into account. We then proceed to model the broad Fe K feature in each source with two different accretion disk emission line codes, as well as a self-consistent, ionized accretion disk spectrum convolved with relativistic smearing from the inner disk. Comparing the results, we show that relativistic blurring of the disk emission is required to explain the spectrum in most sources, even when one models the full reflection spectrum from the photoionized disk.
description: 50 pages (preprint format), 24 figures. Accepted by ApJ
The sign of the overlap of HFB wave functions
Creators: name: Robledo, Luis M.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The problem of how to compute accurately and efficiently the sign of the overlap between two general HFB wave functions is addressed. The results obtained can easily be extrapolated to the evaluation of the sign of the trace of a density operator exponential of one body operators.
description: 5 pages, no figures
re3data COREF - Community Driven Open Reference for Research Data Repositories
Creators: name: Vierkant, Paul
name: Pampel, Heinz
name: Ulrich, Robert
name: Scholze, Frank
name: Kindling, Maxi
name: Witt, Michael
name: Elger, Kirsten
Publisher: name: Zenodo
Year: 2019
Subjects: research data
research data repository
re3data
data management

description: Use unique identification in machine-to-machine (M2M) communication to foster the usage of re3data as an open reference for repositories. Import and export of metadata fragments, controlled vocabularies and database entries of external sources. Adress funding bodies and publishers to recommend re3data in their respective policies to foster the usage of trustworthy repositories complying with the FAIR-principles.
Liberdade na Internet: que utilização é feita dos confessionários on-line?
Creators: name: Moedas, Alexandra
name: Geitoso, Ana Sofia
name: Graça, Daniela
Publisher: name: Internet Latent Corpus Journal
Year: 2010

description: Sustentados pela globalização da Internet, os confessionários on-line tornaram-se uma alternativa recorrente para os utilizadores que vêem na confissão uma necessidade. A liberdade que ferramentas como estas conferem ao utilizador, nomeadamente a possibilidade de manter o anonimato, são características que o definem como um recurso em crescimento. A análise qualitativa de 100 confissões, recolhidas a partir de três websites, foi realizada tendo como principais factores de análise a temática abordada, a atitude e intenção demonstradas pelo confessor, o tipo de linguagem utilizada e a relação destes factores com o anonimato ou identificação das confissões. Os resultados encontrados revelam que os confessionários são utilizados maioritariamente para desabafar e procurar ajuda, e que o anonimato é de facto a opção mais recorrente e que não demonstra uma relação directa com o tipo de linguagem utilizada.
description: Internet Latent Corpus Journal, vol. 1 n.º 1 (2010)
Mach number and wall thermal boundary condition effects on near-wall compressible turbulence
Creators: name: Baranwal, Akanksha
name: Donzis, Diego A.
name: Bowersox, Rodney D. W.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: We investigate the effects of thermal boundary conditions and Mach number on turbulence close to walls. In particular, we study the near-wall asymptotic behavior for adiabatic and pseudo-adiabatic walls, and compare to the asymptotic behavior recently found near isothermal cold walls (Baranwal et al. (2022)). This is done by analyzing a new large database of highly-resolved direct numerical simulations of turbulent channels with different wall thermal conditions and centerline Mach numbers. We observe that the asymptotic power-law behavior of Reynolds stresses as well as heat fluxes does change with both centerline Mach number and thermal-condition at the wall. Power-law exponents transition from their analytical expansion for solenoidal fields to those for non-solenoidal field as the Mach number is increased, though this transition is found to be dependent on the thermal boundary conditions. The correlation coefficients between velocity and temperature are also found to be affected by these factors. Consistent with recent proposals on universal behavior of compressible turbulence, we find that dilatation at the wall is the key scaling parameter for this power-law exponents providing a universal functional law which can provide a basis for general models of near-wall behavior.
description: 24 pages, 15 figures, Under consideration for publication in Journal of Fluid Mechanics
Tutoriais online e fóruns de discussão: comparação entre conteúdos e linguagem
Creators: name: Bastos, Andreia
name: Resende, Cátia
name: Sousa, Ana Filipa
Publisher: name: Internet Latent Corpus Journal
Year: 2010

description: Considerando os novos moldes de aprendizagem mediados pelas novas tecnologias, dois cenários surgem com forte potencial para a aprendizagem informal: os tutoriais online e os fóruns de discussão. O presente trabalho procura comparar a informação neles contida através de uma análise documental qualitativa do conteúdo apresentado em exemplos de tutoriais e fóruns da plataforma Pixel2Life Studios Inc. ©. Assim se analisou o tipo de relação existente entre os dois tipos de conteúdo e se obtiveram resultados que aproximam os dois cenários ao nível do tipo de linguagem, mas que os distanciam quanto ao cuidado na elaboração de conteúdos.
description: Internet Latent Corpus Journal, vol. 1 n.º 1 (2010)
MUSTAQILLIK DAVRI NAVOIYSHUNOSLIGIDA TASAVVUFIY ISTILOHLARNING O'RGANILISH TADRIJI
Creators: name: Rahmatova, Sitora
Publisher: name: Zenodo
Year: 2025

description: Ushbu maqola mustaqillik davri o‘zbek navoiyshunosligida tasavvufiy istilohlarning o‘rganilish jarayoni, uning bosqichlari va tadqiqotlarning ahamiyatini tahlil qilishga qaratilgan. Mazkur maqolada ulug` mutafakkir  Alisher Navoiy asarlaridagi tasavvufiy istilohlar, ularning ma’no-mohiyati va ularni sharhlashdagi zamonaviy yondashuvlar asosida muhim olimlarning ishlari va bu bo`yicha olib borilgan tadqiqotlar yoritiladi.
Internet: florestas de dados ainda por explorar
Creators: name: Souza, Francislê Neri De
Publisher: name: Internet Latent Corpus Journal
Year: 2010

description: A internet tem expandido de forma exponencial não somente em número de utilizadores, mas também em diversidade de interacções, que acarretam uma maior produção de conteúdos e informações diversificadas. por exemplo, o facebook em 2010 encerrou o ano com mais de 400 milhões de utilizadores activos e com mais de 5 bilhões de pedaços de conteúdos (fotos, comentários, vídeos, links web etc.). todas essas pessoas interligadas têm poderes de influenciar e de serem influenciadas, para o bem e para o mal, que nunca foi disponível antes na história da humanidade. (...)
description: Internet Latent Corpus Journal, vol. 1 n.º 1 (2010)
Incommensurate and commensurate antiferromagnetic states in CaMn2As2 and SrMn2As2 revealed by 75As NMR
Creators: name: Ding, Q. -P.
name: Sangeetha, N. S.
name: Pandey, Abhishek
name: Johnston, D. C.
name: Furukawa, Y.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We carried out $^{75}$As nuclear magnetic resonance (NMR) measurements on the trigonal CaMn$_2$As$_2$ and SrMn$_2$As$_2$ insulators exhibiting antiferromagnetic (AFM) ordered states below Néel temperatures $T_{\rm N}$ = 62 K and 120 K, respectively. In the paramagnetic state above $T_{\rm N}$, typical quadrupolar-split $^{75}$As-NMR spectra were observed for both systems. The $^{75}$As quadrupolar frequency $ν_{\rm Q}$ for CaMn$_2$As$_2$ decreases with decreasing temperature, while $ν_{\rm Q}$ for SrMn$_2$As$_2$ increases, showing an opposite temperature dependence.In the AFM state, the relatively sharp and distinct $^{75}$As NMR lines were observed in SrMn$_2$As$_2$ and the NMR spectra were shifted to lower fields for both magnetic fields $H$ $||$ $c$ axis and $H$ $||$ $ab$ plane, suggesting that the internal fields $B_{\rm int}$ at the As site produced by the Mn ordered moments are nearly perpendicular to the external magnetic field direction. No obvious distribution of $B_{\rm int}$ was observed in SrMn$_2$As$_2$, which clearly indicates a commensurate AFM state. In sharp contrast to SrMn$_2$As$_2$, broad and complex NMR spectra were observed in CaMn$_2$As$_2$ in the AFM state, which clearly shows a distribution of $B_{\rm int}$ at the As site, indicating an incommensurate state. From the analysis of the characteristic shape of the observed spectra, the AFM state of CaMn$_2$As$_2$ was determined to be a two-dimensional incommensurate state where Mn ordered moments are aligned in the $ab$ plane. A possible origin for the different AFM states in the systems was discussed. Both CaMn$_2$As$_2$ and SrMn$_2$As$_2$ show very large anisotropy in the nuclear spin-lattice relaxation rate 1/$T_1$ in the paramagnetic state. 1/$T_1$ for $H$ $||$ $ab$ is much larger than that for $H$ $|| $c$, indicating strong anisotropic AFM spin fluctuations in both compounds.
description: 10 pages, 11 figures, accepted for publication in Phys. Rev. B
The vanishing viscosity limit for a dyadic model
Creators: name: Cheskidov, Alexey
name: Friedlander, Susan
Publisher: name: arXiv
Year: 2008
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 76D0; 76F55

description: A dyadic shell model for the Navier-Stokes equations is studied in the context of turbulence. The model is an infinite nonlinearly coupled system of ODEs. It is proved that the unique fixed point is a global attractor, which converges to the global attractor of the inviscid system as viscosity goes to zero. This implies that the average dissipation rate for the viscous system converges to the anomalous dissipation rate for the inviscid system (which is positive) as viscosity goes to zero. This phenomenon is called the dissipation anomaly predicted by Kolmogorov's theory for the actual Navier-Stokes equations.
The addition of exercise to a weight loss diet on inflammatory markers: a systematic review and Meta-analysis of controlled clinical trials
Creators: name: Beigrezaei, Sara
name: Yazdanpanah, Zeinab
name: Soltani, Sepideh
name: Rajaie, Seiede Hamide
name: Mohseni-Takalloo, Sahar
name: Zohrabi, Tayebeh
name: Kaviani, Mojtaba
name: Forbes, Scott C.
name: Baker, Julien S.
name: Salehi-Abargouei, Amin
Publisher: name: Taylor & Francis
Year: 2021
Subjects: subject: Medicine
subject: Biotechnology
subject: Immunology
subject: FOS: Clinical medicine
subject: Developmental Biology

description: This systematic review and meta-analysis of controlled clinical trials was performed to evaluate the effects of weight-loss diets plus exercise compared with weight-loss diets alone on inflammatory biomarkers in adults. PubMed, Scopus, EMBASE, Web of Science (ISI), and Google Scholar were searched up to April 2021. Overall effects were derived using a random effects model. The overall quality of evidence was assessed using Grading of Recommendations Assessment, Development, and Evaluation (GRADE). Twenty-nine trials were included in this systematic review and meta-analysis. The meta-analysis showed no significant difference in serum high sensitivity C-reactive protein (hs-CRP) [weighted mean difference (WMD) = −0.004 mg/l, 95% CI: −0.140, 0.132, P = 0.954], interleukin-6 (IL-6) (WMD = −0.039 pg/ml, 95% CI: −0.233 to 0.156, P = 0.696), and tumor necrosis factor-α (TNF-α) (WMD = 0.405 ng/ml, 95% CI: −1.036 to 0.226, P = 0.209) after adding exercise to a weight-loss diet compared with a weight-loss diet alone. Subgroup analysis revealed that exercise plus a weight-loss diet significantly reduced TNF-α in studies greater than 16 weeks in duration (WMD = −0.742 ng/ml, 95% CI: −1.384 to −0.1, P = 0.024). This systematic review and meta-analysis indicate that exercise in addition to a weight-loss diet does not have a significant effect on further reducing inflammatory markers compared to a weight loss diet alone.
Growth rate trades off with enzymatic investment in soil filamentous fungi
Creators: name: Zheng, Weishuang
name: Lehmann, Anika
name: Ryo, Masahiro
name: Vályi, Kriszta Kezia
name: Rillig, Matthias C.
Publisher: name: Freie Universität Berlin
Year: 2020
Subjects: subject: Fungal ecology
subject: Microbial ecology
subject: 500 Naturwissenschaften und Mathematik::570 Biowissenschaften; Biologie::579 Mikroorganismen, Pilze, Algen

description: Saprobic soil fungi drive many important ecosystem processes, including decomposition, and many of their effects are related to growth rate and enzymatic ability. In mycology, there has long been the implicit assumption of a trade-off between growth and enzymatic investment, which we test here using a set of filamentous fungi from the same soil. For these fungi we measured growth rate (as colony radial extension) and enzymatic repertoire (activities of four enzymes: laccase, cellobiohydrolase, leucine aminopeptidase and acid phosphatase), and explored the interaction between the traits based on phylogenetically corrected methods. Our results support the existence of a trade-off, however only for the enzymes presumably representing a larger metabolic cost (laccase and cellobiohydrolase). Our study offers new insights into potential functional complementarity within the soil fungal community in ecosystem processes, and experimentally supports an enzymatic investment/growth rate trade-off underpinning phenomena including substrate succession.
Unbound Close Stellar Encounters in the Solar Neighborhood
Creators: name: Hansen, Bradley M. S.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present a catalog of unbound stellar pairs, within 100 pc of the Sun, that are undergoing close, hyperbolic, encounters. The data are drawn from the GAIA EDR3 catalogue, and the limiting factors are errors in the radial distance and unknown velocities along the line of sight. Such stellar pairs have been suggested (Hansen & Zuckerman 2021) to be possible events associated with the migration of technological civilisations between stars. As such, this sample may represent a finite set of targets for a SETI search based on this hypothesis. Our catalog contains a total of 132 close passage events, featuring stars from across the entire main sequence, with 16 pairs featuring at least one main sequence star of spectral type between K1 and F3. Many of these stars are also in binaries, so that we isolate eight single stars as the most likely candidates to search for an ongoing migration event -- HD 87978, HD 92577, HD 50669, HD 44006, HD 80790, LSPM J2126+5338, LSPM J0646+1829 and HD 192486. Amongst host stars of known planets, the stars GJ 433 and HR 858 are the best candidates.
description: 25 pages, 10 figures+22 finding charts. to appear in AJ