cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Cotranscriptional kinetic folding of RNA secondary structures including pseudoknots
Creators: name: Thanh, Vo Hong
name: Korpela, Dani
name: Orponen, Pekka
Publisher: name: arXiv
Year: 2020
Subjects: subject: Biomolecules (q-bio.BM)
subject: FOS: Biological sciences

description: Computational prediction of RNA structures is an important problem in computational structural biology. Studies of RNA structure formation often assume that the process starts from a fully synthesized sequence. Experimental evidence, however, has shown that RNA folds concurrently with its elongation. We investigate RNA secondary structure formation, including pseudoknots, that takes into account the cotranscriptional effects. We propose a single-nucleotide resolution kinetic model of the folding process of RNA molecules, where the polymerase-driven elongation of an RNA strand by a new nucleotide is included as a primitive operation, together with a stochastic simulation method that implements this folding concurrently with the transcriptional synthesis. Numerical case studies show that our cotranscriptional RNA folding model can predict the formation of conformations that are favored in actual biological systems. Our new computational tool can thus provide quantitative predictions and offer useful insights into the kinetics of RNA folding.
description: 20 pages, 15 figures
An exotic smooth structure on CP^2+6CP^2-bar
Creators: name: Stipsicz, Andras I
name: Szabo, Zoltan
Publisher: name: arXiv
Year: 2004
Subjects: subject: Geometric Topology (math.GT)
subject: Symplectic Geometry (math.SG)
subject: FOS: Mathematics
subject: 53D05, 14J26, 57R55, 57R57

description: We construct smooth 4-manifolds homeomorphic but not diffeomorphic to CP^2+6CP^2-bar.
description: Published by Geometry and Topology at http://www.maths.warwick.ac.uk/gt/GTVol9/paper19.abs.html
Educação Interdisciplinar: algumas reflexões sobre emancipação nos processos de formação de professores
Creators: name: Guirado, Vanessa Zinderski
name: Fernando, Fernando Santos Da Silva
name: Marcel, Marcel Mendes
Publisher: name: Da Investigação às Práticas: Estudos de Natureza Educacional
Year: 2021

description: O presente artigo propõe uma discussão sobre a interdisciplinaridade presente na educação e no desenvolvimento das ações educacionais e a necessidade de pensar a formação do cidadão, dentro de uma proposta interdisciplinar emancipadora, que consiga promover uma perspectiva dialógica entre as áreas de conhecimento e favoreça o pensamento crítico reflexivo, em que o sujeito seja capaz de aprender a aprender e de reconhecer não existem saberes totalmente isolados, eles sempre apresentam permeabilidade entre outros conhecimentos. Para tanto, é imprescindível que a formação de professores também ofereça aos futuros professores concepções de ensino alinhadas com a proposta educacional ora apresentada, em que eles sejam conscientes do seu papel social enquanto professores, de forma a explorar a potência existente nas ações educacionais enquanto agentes de mudança. Palavras-chave: Educação; Interdisciplinaridade; Formação de Professores.
description: Da Investigação às Práticas: Estudos de Natureza Educacional, v. 11, n. 1 (2021)
Prática de Ensino Supervisionada em História e Geografia de Portugal no 2.º CEB: perspetiva crítica para a mudança
Creators: name: Dias, Alfredo Gomes
Publisher: name: Da Investigação às Práticas: Estudos de Natureza Educacional
Year: 2021

description: Tal como a prática de ensino, também as práticas de supervisão pedagógica realizadas durante a formação inicial de professores devem ser alvo de reflexão crítica com o objetivo de introduzir mudanças que melhorem a formação dos estudantes do Mestrado em Ensino do 1.º Ciclo do Ensino Básico e de Português e História e Geografia de Portugal do 2.º Ciclo do Ensino Básico. Com este artigo pretendemos (i) construir um mapa conceptual que enquadre a prática de supervisão em História e Geografia, no 2.º ciclo; (ii) analisar os domínios que foram considerados prioritários nas observações realizadas durante a unidade curricular de Prática de Ensino Supervisionada II – 2.º ciclo; (iii) refletir criticamente sobre a prática de supervisão implementada nos últimos anos, na Escola Superior de Educação de Lisboa. Metodologicamente analisaram-se (1) os registos de observação reunidos durante a Prática de Ensino Supervisionada II – 2.º CEB, no âmbito daquele mestrado, entre os anos letivos de 2014/2015 e 2019/2020; (2) as reflexões produzidas pelos estudantes, no ano letivo de 2019/2020. Com esta análise foi possível identificar lacunas e fragilidades nas práticas de supervisão em História e Geografia de Portugal do 2.º CEB e identificar linhas de ação que poderão melhorar as atividades de acompanhamento dos estudantes e, desse modo, a sua formação, enquanto futuros professores de História e Geografia.
description: Da Investigação às Práticas: Estudos de Natureza Educacional, v. 11, n. 1 (2021)
Vibrations of a beam between stops: convergence of a fully discretized approximation
Creators: name: Dumont, Y.
name: Paoli, L.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Numerical Analysis (math.NA)
subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 35L48, 65M12, 74H45

description: We consider the dynamics of an elastic beam which is clamped at its left end to a vibrating support and which can move freely at its right end between two rigid obstacles (the stops). We model the contact with Signorini's complementary conditions between the displacement and the shear stress. For this infinite dimensional contact problem, we propose a family of fully discretized approximations and their convergence is proved. Moreover some examples of implementation are presented.
description: 24 pages, 8 figures
Inovar na Educação em Ciencias em Angola: Um estudo exploratorio na formação continua de professores na area da Bioenergetica.
Creators: name: Vaile, Felix Kuenda Uba
name: Lopes, Betina
name: Loureiro, Maria João
Publisher: name: Da Investigação às Práticas: Estudos de Natureza Educacional
Year: 2021

description: Neste artigo descreve-se uma primeira fase de um programa de formação contínua de professores em desenvolvimento no âmbito de um projeto de doutoramento e a decorrer numa escola do Segundo Ciclo do Ensino Secundário de Angola. Pretendeu-se trabalhar a inovação na Educação em Ciências apostando: na introdução do tema da Bioenergética, em que os alunos apresentam muitas dificuldades e na planificação de atividades educativas atendendo à recente reestruturação curricular em Angola e à literatura da especialidade, em particular, sobre o trabalho prático na Educação em Ciências. A questão de investigação que subjaz ao estudo é: em que medida processos de formação contínua de professores sobre Bioenergética, centrados na continuidade e em princípios construtivistas, promovem alteração de práticas de ensino e a aprendizagem dos alunos? Trata-se de um estudo de natureza qualitativa do tipo estudo de caso exploratório. Foram recolhidas planificações, uma narrativa multimodal e artefactos produzidos pelos alunos, que se analisaram usando técnicas de análise interna e de conteúdo. Os resultados evidenciam uma apropriação da planificação de aulas centrada na articulação de conteúdos e em atividades práticas, antes não exploradas por falta de material, e reforçam a importância e relevância de se investir em estratégia de formação contínua no contexto e adaptadas às necessidades dos professores. No que respeita às aprendizagens dos alunos, os resultados apontam para algum grau de sucesso, uma vez que os objetivos da aula planificada parecem ter sido atingidos por alguns alunos. Nas considerações finais sugerem-se princípios a ter em conta na formação contínua de professores em contextos em que esta é deficitária e em que existe falta de recursos educativos
description: Da Investigação às Práticas: Estudos de Natureza Educacional, v. 11, n. 1 (2021)
Monte Carlo Simulation and Statistical Analysis of Genetic Information Coding
Creators: name: Gultepe, E.
name: Kurnaz, M. L.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Genomics (q-bio.GN)
subject: FOS: Biological sciences

description: The rules that specify how the information contained in DNA codes amino acids, is called "the genetic code". Using a simplified version of the Penna nodel, we are using computer simulations to investigate the importance of the genetic code and the number of amino acids in Nature on population dynamics. We find that the genetic code is not a random pairing of codons to amino acids and the number of amino acids in Nature is an optimum under mutations.
description: 11 pages, 3 figures, submitted to Physica A
学习者对翻转初级中文网课及语言表现的感知
Creators: name: LEE, He-Fang
Publisher: name: CHUN - Chinesisch-Unterricht
Year: 2024

description: 柏林一所高校的学生课堂时数因2020 年的数字化教学规定而缩减，为维持学期的原定进度并达到教学目标，笔者实行翻转课堂及行动导向教学。本文呈现课前、课中及课后三阶段模式，接着通过量化与质化调查来探索此一模式在学习者视角下提高语言表现的情形及对翻转中文网课的感知。结果发现多数学生不仅通过口头及书面分流的学习活动而逐步提高了语言表现，而且对网课互动也有正向感受，对于不可抗的科技问题及缺乏真实社交则感到负面。虽然多数认为此一模式适合初级中文，仅半数愿意在非数字化学期的实体课室用翻转模式学习。本文最后说明可能的原因，并以教学法在翻转初级中文课扮演的角色作为结论。
description: CHUN - Chinesisch-Unterricht, Bd. 36 (2021): CHUN - Chinesischunterricht
Confronting hybrid inflation in supergravity with CMB data
Creators: name: Jeannerot, Rachel
name: Postma, Marieke
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Astrophysics (astro-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: $F$-term GUT inflation coupled to N=1 Supergravity is confronted with CMB data. Corrections to the string mass-per-unit-length away from the Bogomolny limit are taken into account. We find that a superpotential coupling $10^{-7}/\mcN \lesssim κ\lesssim 10^{-2}/\mcN$, with $\mcN$ the dimension of the Higgs-representation, is still compatible with the data. The parameter space is enlarged in warm inflation, as well as in the curvaton and inhomogeneous reheat scenario. $F$-strings formed at the end of $P$-term inflation are also considered. Because these strings satisfy the Bogomolny bound the bounds are stronger: the gauge coupling is constrained to the range $10^{-7} < g <10^{-4}$.
description: 36 pages, 15 figures
Autonomous Temporal Probability Concentration: Clockworks and the Second Law of Thermodynamics
Creators: name: Schwarzhans, Emanuel
name: Lock, Maximilian P. E.
name: Erker, Paul
name: Friis, Nicolai
name: Huber, Marcus
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: According to thermodynamics, the inevitable increase of entropy allows the past to be distinguished from the future. From this perspective, any clock must incorporate an irreversible process that allows this flow of entropy to be tracked. In addition, an integral part of a clock is a clockwork, that is, a system whose purpose is to temporally concentrate the irreversible events that drive this entropic flow, thereby increasing the accuracy of the resulting clock ticks compared to counting purely random equilibration events. In this article, we formalise the task of autonomous temporal probability concentration as the inherent goal of any clockwork based on thermal gradients. Within this framework, we show that a perfect clockwork can be approximated arbitrarily well by increasing its complexity. Furthermore, we combine such an idealised clockwork model, comprised of many qubits, with an irreversible decay mechanism to showcase the ultimate thermodynamic limits to the measurement of time.
description: 12+11 pages, 8 figures
Exact Solutions of Lovelock-Born-Infeld Black Holes
Creators: name: Aiello, Matias
name: Ferraro, Rafael
name: Giribet, Gaston
Publisher: name: arXiv
Year: 2004
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The exact five-dimensional charged black hole solution in Lovelock gravity coupled to Born-Infeld electrodynamics is presented. This solution interpolates between the Hoffmann black hole for the Einstein-Born-Infeld theory and other solutions in the Lovelock theory previously studied in the literature. The conical singularity of the metric around the origin can be removed by a proper choice of the black hole parameters. The thermodynamic properties of the solution are also analyzed and, in particular, it is shown that the behaviour of the specific heat indicates the existence of a stability transition point in the vacuum solutions. We discuss the similarities existing between this five-dimensional geometry and the three-dimensional black hole. Like BTZ black hole, the Lovelock black hole has an infinite lifetime.
description: 9 pages, 7 figures, Revtex. Extended version of the paper published in Phys. Rev. D
Mapeamento do ensino do português na educação superior no Mercosul
Creators: name: Bezerra Ferreira, José Genival
Publisher: name: Da Investigação às Práticas: Estudos de Natureza Educacional
Year: 2021

description: O artigo objetivou mapear o ensino do Português Língua Estrangeira (PLE) nas universidades públicas e particulares nos países fundadores do Mercado Comum do Sul - Mercosul (Argentina, Paraguai e Uruguai). Para tanto, investigamos todos os websites das universidades do Bloco, realizamos revisão bibliográfica e documental (leis e estatutos universitários), identificamos as graduações que ofertam a Língua Portuguesa (LP), bem como analisamos a grade curricular de cursos a fim de conhecer a carga horaria letiva dedicada a esse idioma. Constatamos que num total de 161 universidades, apenas 43 lecionam o idioma português numa graduação específica ou como unidade curricular, também nos certificamos que o país que tem mais se empenhado na difusão do ensino da LP é a Argentina, ainda que timidamente, e a maioria das graduações que ofertam o português são da área econômica, turística e jornalística.
description: Da Investigação às Práticas: Estudos de Natureza Educacional, v. 11, n. 1 (2021)
Structure and equation of state of interaction site models for disc-shaped lamellar colloids
Creators: name: Costa, Dino
name: Hansen, Jean-Pierre
name: Harnau, Ludger
Publisher: name: arXiv
Year: 2004
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We apply RISM (Reference Interaction Site Model) and PRISM (polymer-RISM) theories to calculate the site-site pair structure and the osmotic equation of state of suspensions of circular or hexagonal platelets (lamellar colloids) over a range of ratios of the particle diameter over thickness. Despite the neglect of edge effects, the simpler PRISM theory yields results in good agreement with the more elaborate RISM calculations, provided the correct form factor, characterizing the intramolecular structure of the platelets, is used. The RISM equation of state is sensitive to the number of sites used to model the platelets, but saturates when the hard spheres, associated with the interaction sites, nearly touch; the limiting equation of state agrees reasonably well with available simulation data for all densities up to the isotropic-nematic transition. When properly scaled with the second virial coefficient, the equations of state of platelets with different aspect ratios nearly collapse on a single master curve.
description: 10 Pages, 11 Figures, Typesetted using RevTeX4
Prospects of non-resonant di-Higgs searches and Higgs boson self-coupling measurement at the HE-LHC using machine learning techniques
Creators: name: Adhikary, Amit
name: Barman, Rahool Kumar
name: Bhattacherjee, Biplob
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The prospects of observing the non-resonant di-Higgs production in the Standard Model at the proposed high energy upgrade of the LHC, $viz.$ the HE-LHC$~$($\sqrt{s}=27~{\rm TeV}$ and $\mathcal{L} = 15~{\rm ab^{-1}}$) is studied. Various di-Higgs final states are considered based on their cleanliness and signal yields. The search for the non-resonant double Higgs production at the HE-LHC is performed in the $b\bar{b}γγ$, $b\bar{b}τ^{+}τ^{-}$, $b\bar{b}WW^{*}$, $WW^{*}γγ$, $b\bar{b}ZZ^{*}$ and $b\bar{b}μ^{+}μ^{-}$ channels. The signal-background discrimination is performed through multivariate analyses using the Boosted Decision Tree Decorrelated$~$(BDTD) algorithm in the$~$TMVA framework, the XGBoost toolkit and Deep Neural Network$~$(DNN). The variation in the kinematics of Higgs pair production as a function of the self-coupling of the Higgs boson, $λ_{h}$, is also studied. The ramifications of varying $λ_{h}$ on the $b\bar{b}γγ$, $b\bar{b}τ^{+}τ^{-}$ and $b\bar{b}WW^{*}$ search analyses optimized for the SM hypothesis is also explored.
description: Version 2; Modified significance formula used; version accepted for publication in JHEP
When are There Infinitely Many Irreducible Elements in a Principal Ideal Domain?
Creators: name: Zanello, Fabrizio
Publisher: name: arXiv
Year: 2004
Subjects: subject: Commutative Algebra (math.AC)
subject: Rings and Algebras (math.RA)
subject: FOS: Mathematics
subject: 13F10 (Primary); 11R27 (Secondary)

description: It has been a well-known fact since Euclid's time that there exist infinitely many rational primes. Two natural questions arise: In which other rings, sufficiently similar to the integers, are there infinitely many irreducible elements? Is there a unifying algebraic concept that characterizes such rings? The purpose of this note is to place the fact concerning the infinity of primes into a more general context, one that also includes the interesting case of the factorial domains of algebraic integers in a number field. We show that, if $A$ is a P.I.D., then $A$ contains infinitely many (pairwise nonassociate) irreducible elements if and only if every maximal ideal of $A[x]$ has the same (maximal) height.
description: 5 pages (3 pages in the journal)
பரிபாடல்காட்டும் வையையின் விழாவும்மும்
Creators: name: Kala, Sree
Publisher: name: figshare
Year: 2020
Subjects: subject: 200315 Indian Languages
subject: FOS: Languages and literature
subject: 200520 Indian Literature

description: ஒரு நகருக்கு வளமையைத்தருவதுஅந்நகரைச்சுற்றியுள்ள ந்திகளே ஆகும் புதுமழையினால் நிலப்பகுதி அழகுபெறும் பெருவெள்ளம் கரைபுரண்டோடும் புதுப்புனலில் நீராட மக்கள் திரண்டு வருவர் அதணை ஒரு விழாவாக்க்கொண்டாடுவர் இதுவே நீரணிவிழாவாகும் பொன்னால செய்யப்பட்ட சங்கு ந்ண்டு இரால் வாளை மீன் போன்றவற்றை புதுநீரில விதைத்து கழனிகள் விளைக வளமை உருவாகுக என்றுவாழ்த்துவர் அக்கால மக்களின் சமூக நிலையை இலக்கியங்கள் படம் பிடித்து காட்டுகின்றன
Processos disfuncionais no trabalho de grupo e perceções de justiça dos estudantes: um estudo de caso exploratório no ensino superior
Creators: name: Lima, Jorge Ávila De
Publisher: name: Da Investigação às Práticas: Estudos de Natureza Educacional
Year: 2021

description: Os contributos desiguais e outras características disfuncionais dos grupos de estudantes são um fenómeno relativamente bem investigado. No entanto, ainda sabemos pouco sobre como os alunos vivenciam estas situações e como isso afeta a sua perceção da justiça dos sistemas que os docentes usam para avaliar o seu trabalho. Neste artigo, apresenta-se e discute-se os resultados de um estudo de caso que abordou estas questões. A investigação concentrou-se numa turma de métodos de pesquisa sociológica, no ensino superior, em que os alunos formaram grupos de trabalho para desenvolverem projetos de pesquisa ao longo de um semestre. Os dados foram recolhidos por meio de entrevistas qualitativas semiestruturadas e sujeitos a uma análise de conteúdo. Os resultados indicam que embora a maioria dos estudantes tenha experienciado situações disfuncionais nos seus grupos, especialmente no que diz respeito a contributos desiguais dos respetivos membros, rejeitou, mesmo assim, a adoção de um sistema de avaliação baseado no princípio da equidade, através da prestação de contas individual. Interpretamos estes resultados à luz das normas relacionais que governam a vida social dos grupos de estudantes.SoS
description: Da Investigação às Práticas: Estudos de Natureza Educacional, v. 11, n. 1 (2021)
Observational backreaction in discrete black holes lattice cosmological models
Creators: name: Gregoris, Daniele
name: Rosquist, Kjell
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Applying the Sachs formalism, the optical properties encoded in the distance modulus are studied along curves exhibiting local rotational symmetry for some closed inhomogeneous cosmological models whose mass content is discretized by Schwarzschild-like sources. These models may challenge the concordance model in its use of the distance modulus data of type Ia supernovae, because they do not violate any energy condition. This result relies only on the symmetry properties considered, and not on the way in which the mass is discretized. The models with different number of sources are then compared among themselves and with a Friedmann-Lemaitre-Robertson-Walker model with the same total mass content by introducing a compactness parameter. The analysis shows that observational backreaction occurs because increasing the number of sources the features of a universe with a continuous matter distribution are not recovered. Our models are shown to exhibit a non-trivial relationship between kinematical, dynamical and observational backreactions, the kinematical one being asymptotically decreasing while the latter two are present. Furthermore, the electric part of the Weyl tensor contributes to the luminosity distance by affecting the evolution of the scale factor, while the magnetic part has an indirect role by affecting only the evolution of the former
description: Matches published version
Supplementary Materials.docx
Creators: name: Holmboe, Stine
name: Jasuja, Ravi
name: Lawney, Brian
name: Priskorn, Lærke
name: Jørgensen, Niels
name: Linneberg, Allan
name: Jensen, Tina Kold
name: Skakkebaek, Niels Erik
name: Juul, Anders
name: Anna-Maria Andersson
Publisher: name: figshare
Year: 2020
Subjects: subject: 110306 Endocrinology
subject: FOS: Clinical medicine

description: Unadjusted and fully adjusted Cox regression analyses of the association between hormone levels and type 2 diabetes, Ischemic Heart Disease, CVD and all-cause mortality
Entanglement correlations, Bell inequalities, and the concurrence
Creators: name: Cirone, Markus A.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Probabilities of measurement outcomes of two-particle entangled states give a physically transparent interpretation of the concurrence and of the I-concurrence as entanglement measures. The (I)-concurrence can thus be measured experimentally. The tight connection between these measures and Bell inequalities is highlighted.
description: Updated version of quant-ph/0110139, with extension to mixed states. To appear in Phys. Lett. A
O ensino da gramática: paradigmas e desafios
Creators: name: Tavares De Faria, Rui
Publisher: name: Da Investigação às Práticas: Estudos de Natureza Educacional
Year: 2021

description: O ensino do Português tem sido alvo de mudanças didático-pedagógicas, nas duas últimas décadas. A atualização dos Programas, a reestruturação das práticas letivas e as frequentes reformulações no âmbito da avaliação da disciplina de Português poderão indiciar que ainda não foi delineado o melhor ensino-aprendizagem de uma unidade curricular fulcral, como é a língua portuguesa. Por conseguinte, o ensino da gramática vai passando por abordagens diversificadas: ora em contexto, a partir das fontes literárias que predominam nos manuais escolares ou ao serviço do desenvolvimento do domínio da escrita, ora fora de qualquer contexto, segundo metodologias de aprendizagem normativas e tradicionais, para dotar os alunos de um saber linguístico geral que deverá auxiliá-los no desenvolvimento das diferentes competências por que se pauta o ensino-aprendizagem do Português. Que paradigma (ou paradigmas) do ensino da gramática se tem revelado mais eficaz no devido reconhecimento das estruturas gramaticais da língua portuguesa? Que vantagens oferece cada um destes paradigmas? Que desafios se colocam aos professores, aos alunos e aos falantes em geral? É necessário reestruturar o sistema de ensino? É necessário reestruturar o sistema de ensino? O ciclo de aprendizagens? O plano curricular?
description: Da Investigação às Práticas: Estudos de Natureza Educacional, v. 11, n. 1 (2021)
Quantum algorithmic differentiation
Creators: name: Colucci, Giuseppe
name: Giacosa, Francesco
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: In this work we present an algorithm to perform algorithmic differentiation in the context of quantum computing. We present two versions of the algorithm, one which is fully quantum and one which employees a classical step (hybrid approach). Since the implementation of elementary functions is already possible on quantum computers, the scheme that we propose can be easily applied. Moreover, since some steps (such as the CNOT operator) can (or will be) faster on a quantum computer than on a classical one, our procedure may ultimately demonstrate that quantum algorithmic differentiation has an advantage relative to its classical counterpart.
description: 15 pages, 5 figures
Canadian Consumer Concerns About Food Safety Issues and Confidence in Food Products: Comparison of Beef and Pork
Creators: name: Muringai, Violet
name: Goddard, Ellen W.
name: Muringai, Violet
name: Goddard, Ellen W.
Publisher: name: Unknown
Year: 2010
Subjects: Food Consumption/Nutrition/Food Safety
Food Security and Poverty

description: In examining consumers’ willingness to pay (WTP) for food attributes, one approach is to use economic experiments, sometimes associated with consumers sensory testing. In this particular research project different types of pork chops are examined to identify consumer WTP for pork chop credence attributes such as traditionally raised, Canadian Pork labelled or identified as coming from a farm with on farm food safety accreditation (CQA). However, the results of the research are only useful for the national industry if the participants’ values can be extrapolated to the Canadian population. The participants in the research completed a survey that was similar in many respects to a national on-line survey completed in Canada two months earlier. Comparing the responses from the pork study to the national on line survey can help identify how different the respondents are. The pork study participants self studied to be part of a consumers panel for the Alberta Food Product Testing Centre in Edmonton. Respondents in both groups have less confidence in pork relative to other food products. Respondents in the pork survey were mostly concerned about antibiotics in meat while national survey respondents were mostly concerned about animals genetically modified for meat, egg or dairy production. In terms of human health issues, pork survey respondents were mostly concerned about while national survey respondents were more concerned about unhealthy eating. Respondents in the pork survey had lower risk perception scores for pork and were more willing to accept the risks of eating pork than the national panel assessed either beef or chicken.
DESCOLA - reconfigurações e reiterações da gramática escolar
Creators: name: Gomes, Elisabete X.
name: Alves, Mariana Gaio
name: Pires, Ana Luísa De Oliveira
Publisher: name: Da Investigação às Práticas: Estudos de Natureza Educacional
Year: 2021

description: Reconhecendo a relevância social e científica atual das pesquisas que considerem, articuladamente, as dinâmicas educativas que decorrem dentro e fora dos espaços escolares, apresenta-se um estudo que explora uma oferta educativa da responsabilidade do município de Lisboa - o programa descola – a qual tem como público-alvo os professores e alunos das escolas básicas e secundárias. Orientada pela questão central “em que medida o descola reitera e/ou reconfigura a gramática escolar de educação?”, desenvolve-se uma abordagem metodológica qualitativa e interpretativa que assenta na análise de conteúdo da brochura do programa. Os resultados da pesquisa sugerem a presença de marcas da gramática escolar no descola, mas também de interrupções da mesma, fazendo emergir possibilidades de mudança da organização e trabalho escolares numa lógica de espaço público de educação.
description: Da Investigação às Práticas: Estudos de Natureza Educacional, v. 11, n. 1 (2021)
The ELM Survey South. I. An Effective Search for Extremely Low Mass White Dwarfs
Creators: name: Kosakowski, Alekzander
name: Kilic, Mukremin
name: Brown, Warren R.
name: Gianninas, Alexandros
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We begin the search for extremely-low mass ($M\leq0.3M_{\odot}$, ELM) white dwarfs (WDs) in the southern sky based on photometry from the VST ATLAS and SkyMapper surveys. We use a similar color-selection method as the Hypervelocity star survey. We switched to an astrometric selection once Gaia Data Release 2 became available. We use the previously known sample of ELM white dwarfs to demonstrate that these objects occupy a unique parameter space in parallax and magnitude. We use the SOAR 4.1m telescope to test the Gaia-based selection, and identify more than two dozen low-mass white dwarfs, including 6 new ELM white dwarf binaries with periods as short as 2 h. The better efficiency of the Gaia-based selection enables us to extend the ELM Survey footprint to the southern sky. We confirm one of our candidates, J0500$-$0930, to become the brightest ($G=12.6$ mag) and closest ($d=72$ pc) ELM white dwarf binary currently known. Remarkably, the Transiting Exoplanet Survey Satellite (TESS) full-frame imaging data on this system reveals low-level ($<0.1$%) but significant variability at the orbital period of this system ($P=9.5$ h), likely from the relativistic beaming effect. TESS data on another system, J0642$-$5605, reveals ellipsoidal variations due to a tidally distorted ELM WD. These demonstrate the power of TESS full-frame images in confirming the orbital periods of relatively bright compact object binaries.
description: 25 pages, 15 figures, 8 tables
Comparison of Nuclear Starburst Luminosities between Seyfert 1 and 2 Galaxies Based on Near-infrared Spectroscopy
Creators: name: Imanishi, Masatoshi
name: Wada, Keiichi
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We report on infrared K- (2-2.5 micron) and L-band (2.8-4.1 micron) slit spectroscopy of 23 Seyfert 1 galaxies in the CfA and 12 micron samples. A polycyclic aromatic hydrocarbon (PAH) emission feature at 3.3 micron in the L band is primarily used to investigate nuclear star-forming activity in these galaxies. The 3.3 micron PAH emission is detected in 10 sources (=43%), demonstrating that detection of nuclear star-formation in a significant fraction of Seyfert 1 galaxies is now feasible. For the PAH-detected nuclei, the surface brightness values of the PAH emission are as high as those of typical starbursts, suggesting that the PAH emission probes the putative nuclear starbursts in the dusty tori around the central active galactic nuclei (AGNs). The magnitudes of the nuclear starbursts are quantitatively estimated from the observed 3.3 micron PAH emission luminosities. The estimated starburst luminosities relative to some indicators of AGN powers in these Seyfert 1s are compared with 32 Seyfert 2s in the same samples that we have previously observed. We find that there is no significant difference in nuclear starburst to AGN luminosity ratios between Seyfert 1 and 2 galaxies, and that nuclear starburst luminosity positively correlates with AGN power in both types of Seyferts. Our results favor a slightly-modified AGN unification model, which predicts that nuclear starbursts occurring in the dusty tori of Seyferts are physically connected to the central AGNs, rather than the classical unification paradigm, in which the dusty tori simply hide the central AGNs of Seyfert 2s and reprocess AGN radiation as infrared dust emission in Seyferts. No significant differences in nuclear star formation properties are recognizable between Seyfert 1s in the CfA and 12 micron samples.
description: 39 pages, 6 figures, Accepted for publication in ApJ (10 December 2004, vol 617 issue)
Indemnização justa ou irrisória? Comentário ao Acórdão n.º 39/88 do Tribunal Constitucional, de 9 de Fevereiro de 1988
Creators: name: Freitas Do Amaral, Diogo
Publisher: name: Direito e Justiça
Year: 2021

description: Direito e Justiça, v. 5 (1991)
Food Insecurity, Family Structure and Agricultural Productivity: the role of Social Capital in Nigeria.
Creators: name: Kuku-Shittu, Oluyemisi
name: Liverpool-Tasie, Lenis Saweda O.
name: Kuku-Shittu, Oluyemisi
name: Liverpool-Tasie, Lenis Saweda O.
Publisher: name: Unknown
Year: 2010
Subjects: Food Security and Poverty

description: Replaced with revised version of paper 07/21/10.
The muon deficit problem: a new method to calculate the muon rescaling factors and the Heitler-Matthews β exponent
Creators: name: Cheminant, Kevin Almeida
name: Góra, Dariusz
name: Borodai, Nataliia
name: Engel, Ralph
name: Pierog, Tanguy
name: Pekala, Jan
name: Roth, Markus
name: Stasielak, Jarosław
name: Unger, Michael
name: Veberič, Darko
name: Wilczyński, Henryk
Publisher: name: Scuola Internazionale Superiore di Studi Avanzati (SISSA)
Year: 2023

description: Simulations of extensive air showers using current hadronic interaction models predict too small numbers of muons compared to events observed in the air-shower experiments, which is known as the muon-deficit problem. In this work, we present a new method to calculate the factor by which the muon signal obtained via Monte-Carlo simulations must be rescaled to match the data, as well as the 𝛽 exponent from the Heitler-Matthews model which governs the number of muons found in an extensive air shower as a function of the mass and the energy of the primary cosmic ray. This method uses the so-called 𝑧 variable (difference between the total reconstructed and the simulated signals), which is connected to the muon signal and is roughly independent of the zenith angle, but depends on the mass of the primary cosmic ray. Using a mock dataset built from QGSJetII-04, we show that such a method allows us to reproduce the average muon signal from this dataset using Monte-Carlo events generated with the EPOS-LHC hadronic model, with accuracy better than 6%. As a consequence of the good recovery of the muon signal for each primary included in the analysis, also the 𝛽 exponent can be obtained with accuracy of less than 1% for the studied system. Detailed simulations show a dependence of the 𝛽 exponent on hadronic interaction properties, thus the determination of this parameter is important for understanding the muon deficit problem.
Educação online em tempos pandémicos: Condições TIC por parte dos alunos do Ensino Superior em Angola
Creators: name: Barbante, Cesário José Sanjambo
name: Oliveira, Lia Raquel
Publisher: name: Da Investigação às Práticas: Estudos de Natureza Educacional
Year: 2021

description: O mundo está a viver uma experiência única, nunca visto dantes, face à pandemia da COVID-19. Neste sentido, a educação online por parte dos alunos tem sido mais explorada em tempos pandémicos. O presente trabalho objetiva constatar as condições TIC por parte dos alunos do Ensino Superior, em Angola. A metodologia desta investigação inscreve-se num plano não experimental. Foram adotadas, para a recolha de dados, as seguintes técnicas: dados compilados, conjunto de dados, observação indireta e inquérito por questionário. Definiu-se a seguinte questão de investigação: quais as condições TIC dos alunos para o acesso à educação online em tempo de pandemia? Com este estudo, constatou-se que a maior parte dos alunos tem disponível recursos tecnológicos ligados à internet – com largura de banda reduzida –, designadamente computador, smartphone e tablet. Os resultados ainda mostram que existe um número considerável de alunos que não possui um equipamento TIC ligado à internet.
description: Da Investigação às Práticas: Estudos de Natureza Educacional, v. 11, n. 1 (2021)
Countable state shifts and uniqueness of g-measures
Creators: name: Johansson, Anders
name: Öberg, Anders
name: Pollicott, Mark
Publisher: name: arXiv
Year: 2005
Subjects: subject: Dynamical Systems (math.DS)
subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 37A05, 28D05, 37A30, 37A60, 82B20

description: In this paper we present a new approach to studying g-measures which is based upon local absolute continuity. We extend the result in [11] that square summability of variations of g-functions ensures uniqueness of g-measures. The first extension is to the case of countably many symbols. The second extension is to some cases where $g \geq 0$, relaxing the earlier requirement in [11] that inf g>0.
description: 11 pages
title: The ERIЯƎ Theory: A Ressonant Algebraic Framework for Unified Physics
title: Teoria ERIЯƎ - Exponencialização e Racionalização Imaginária Rotacional Evolutiva
titleType: AlternativeTitle
Creators: name: DanBrasilP
Publisher: name: GitHub
Year: 2025
Subjects: Unified Physics
Resonance
Rotational Algebra
Complex Numbers
Quaternions
Quantum Mechanics
Gravity
Symbolic Computation
Quantum Geometry
Algebraic Physics
Energy Quantization
Geometric Projection
EIRE Transform
RIRE Operator
Gravitation

description: This document summarizes the ERIЯƎ Theory (*Exponentialization and Rationalization of Imaginary Rotational Evolution*), a unified algebraic framework based on rotational coherence across multidimensional imaginary planes (i, j, k). It redefines quantum mechanics, gravitation, classical forces, and the nature of particles using geometric resonance and phase coupling.

The theory introduces the EIRE and RIRE operators, a new transform, and a reinterpretation of Schrödinger, Newton, and Maxwell equations as projections of coherent rotational dynamics.

More details, symbolic simulations, and computational models can be found in the open repository:

https://github.com/DanBrasilP/ERIRE
The low-energy electronic structure and the orbital magnetism in NiO
Creators: name: Radwanski, R. J.
name: Ropka, Z.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The orbital and spin moment of the Ni2+ ion in NiO has been calculated within the quasi-atomic approach. The orbital moment of 0.46 mu_B amounts at 0 K, in the magnetically-ordered state, to about 20% of the total moment (2.45 mu_B). For this outcome, being in nice agreement with the recent experimental finding of the orbital moment, taking into account the intra-atomic spin-orbit coupling is indispensable. PACS: 75.25.+z, 75.10.Dg Keywords: Crystalline Electric Field, 3d oxides, magnetism, NiO
description: 6 pages in RevTeX4, 4 figures
Intervenção precoce, formação profissional e os desafios para a implementação de práticas baseadas em evidência
Creators: name: Marini, Bruna Pereira Ricci
name: Barba, Patrícia Carla De Souza Della
Publisher: name: Da Investigação às Práticas: Estudos de Natureza Educacional
Year: 2021

description: Objetivo: Identificar, pela ótica dos profissionais, quais os referenciais utilizados em suas práticas no campo da Intervenção Precoce, se empregam práticas baseadas em evidências e quais os desafios relacionados à formação profissional. Método: Trata-se do recorte de um estudo com metodologia transversal, descritiva e exploratória, de abordagem quali-quantitativa. O estudo foi desenvolvido em duas etapas: identificação e caracterização dos serviços e equipes de Intervenção Precoce; e estudo exploratório com profissionais que integram essas equipes. Resultados: Os resultados da primeira etapa permitiram a identificação de 95 profissionais, pertencentes a 15 diferentes especialidades, atuando em 9 serviços de Intervenção Precoce das regiões epesquisadas. Na segunda etapa, foram descritas pelos mesmos uma ampla complexidade de referenciais teóricos empregados em suas práticas, assim como dificuldades nos processos de formação continuada e no acesso á conhecimentos científicos que fundamentam as práticas baseadas em evidências. Considerações finais: Diante das questões colocadas, conclui-se que ainda existe um longo caminho a percorrer para a aproximação entre as práticas desenvolvidas e aquelas reconhecidas como as mais eficazes, o que demanda o investimento na formação de qualidade, na articulação entre serviços e universidades e no desenvolvimento de pesquisas em vários níveis para o fomento da qualidade técnica e, consequentemente, o desenvolvimento das melhores práticas.
description: Da Investigação às Práticas: Estudos de Natureza Educacional, v. 11, n. 1 (2021)
title: Why Independence? Trends, Causes and Effects of Secessionist Parties' Discourse
Creators: name: Ferreira, Carles
Publisher: name: University of Kent
Year: 2024

description: Recent decades have witnessed a surge of secessionist politics in multinational democracies, political parties being the main actors in fuelling pro-independence demands. Although the academic literature has started to study party strategies and discourse in a multidimensional political space, limited attention has been given to how secessionist parties make their case for constitutional change - and the causes and consequences of their choices. This thesis identifies an increasing trend towards the articulation of socioeconomic arguments for constitutional change cross-case (Belgium, Canada, Spain, and the UK) and over time (1990 2020), particularly when parties are in office. Constitutional change is increasingly presented as means of improving people's lives rather than as an end in itself. Despite this clear trend suggesting parties find this rhetoric useful to boost public support for independence, the results of experimental surveys show that party frames do not seem to influence public opinion. Instead, pre-existing beliefs and national identity largely explain constitutional preferences. These findings suggest that secessionist parties might trade office-seeking goals over policy when choosing their campaigns. By presenting independence as a means of achieving better standards of living, secessionist parties likely aim to increase their electoral appeal and to enhance their reputation as competent ruling parties vis-à-vis their state-wide competitors.
Prospects for Skills-Based Export Growth in a Labour-Abundant, Resource-Rich Economy: Indonesia in Comparative Perspective
Creators: name: Coxhead, Ian A.
name: Li, Muqun
name: Coxhead, Ian A.
name: Li, Muqun
Publisher: name: Unknown
Year: 2008
Subjects: International Relations/Trade
Labor and Human Capital

description: In an integrated global economy, specialisation in trade is an increasingly prominent strategy. A labour-abundant, resource-rich economy like Indonesia faces stiff competition for labour-intensive manufactures; meanwhile, rapid growth in demand for resources from China and India exposes it to the ‘curse’ of resource wealth. This diminishes prospects for more diversified growth based on renewable resources like human capital. Using an international panel data set we explore the influence of resource wealth, foreign direct investment, and human capital on the share of skill-intensive products in total exports. FDI and human capital increase this share; resource wealth diminishes it. We use the results to compare Indonesia with Thailand and Malaysia. Indonesia’s reliance on skill-intensive exports would have been higher had it achieved higher levels of FDI and skills. Indonesia’s performance in accumulating these endowments, and its relative resource abundance, impede diversification in production and trade. Finally, we discuss policy lessons and options.
Environmental Impact on the Southeast Limb of the Cygnus Loop
Creators: name: Levenson, N. A.
name: Graham, James R.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We analyze observations from the Chandra X-ray Observatory of the southeast knot of the Cygnus Loop supernova remnant. In this region, the blast wave propagates through an inhomogeneous environment. Extrinsic differences and subsequent multiple projections along the line of sight rather than intrinsic shock variations, such as fluid instabilities, account for the apparent complexity of the images. Interactions between the supernova blast wave and density enhancements of a large interstellar cloud can produce the morphological and spectral characteristics. Most of the X-ray flux arises in such interactions, not in the diffuse interior of the supernova remnant. Additional observations at optical and radio wavelengths support this account of the existing interstellar medium and its role in shaping the Cygnus Loop, and they demonstrate that the southeast knot is not a small cloud that the blast wave has engulfed. These data are consistent with rapid equilibration of electron and ion temperatures behind the shock front, and the current blast wave velocity v_{bw} approx 330 km/s. Most of this area does not show strong evidence for non-equilibrium ionization conditions, which may be a consequence of the high densities of the bright emission regions.
description: To appear in ApJ, April 1, 2005
Sensing of carbon monoxide via luminescence of ruthenium complexes containing a hemilabile phosphine pyrenyl ether ligand
Creators: name: Thorne, Lisa Margaret
Publisher: name: University of British Columbia
Year: 2009

description: Our laboratory previously reported a Ru2 + complex with a hemilabile phosphine ether ligand tcc-RuCl2(POC4Pyr-P,O)2 (14) (POC4Pyr = 4-{2- (diphenylphosphino)phenoxy}butylpyrene). This complex reacts rapidly with carbon monoxide to produce a significant luminescence response in which the monomer: excimer emission ratio changes dramatically. The reaction with CO is accompanied by a geometric isomerization from the initial trans-dicarbonyl product, ttt- RuCl2(CO)2(POC4Pyr-P)2 , to the cis-dicarbonyl product, crt-RuCl2(CO)2(POC4Pyr-P)2. However, an OFF-ON response was not achieved. Two methodologies are explored in this thesis to obtain the desirable OFF-ON response by promoting pyrene fluorescence quenching before exposure to CO. Attempts are reported to synthesize ligands with tether lengths less than four carbon atoms in length in order to probe the effect of tether length between the pyrene moiety and the rest of the complex on fluorescence quenching. Although a ligand with a one-carbon tether ({2-(diphenylphosphino)phenoxy}methylpyrene) was not successfully synthesized, a ligand with a two-carbon tether (2-{2- (diphenylphosphino)phenoxy}ethylpyrene) was obtained. However, attempts to coordinate this ligand with Ru were unsuccessful. A second strategy explored in this thesis is the effect of changing the halide ligands of complex 14 to either bromo (22) (tcc-RuBr2(POC4Pyr-P,O)2) or iodo ligands (23) (tcc-Rul2(POC4Pyr-P,O)2). The different halogen ligands are expected to change the energies of the metal d-orbitals and possibly result in fluorescence quenching. This series of complexes with different halogen ligands has been fully characterized by NMR, MS, UV-vis and fluorescence spectroscopies and their reactivity toward CO studied. A similar geometric isomerization from the ttt isomer to the cct isomer was observed for 22 and 23 as for 14. Furthermore, fluorescence experiments were undertaken in order to explore the changes in fluorescence properties that accompany the reaction with CO. No excimer emission is observed even at high concentration before reaction with CO for 14, 22 or 23. After reaction with CO, excimer emission is observed for all complexes. From excitation, steady-state emission, and UV-vis spectroscopies, it has been determined that both inter- and intra-molecular excimers are observed that originate from loosely coupled or transient molecular pairs.