cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Diamond Integrated Optomechanical Circuits
Creators: name: Rath, Patrik
name: Khasminskaya, Svetlana
name: Nebel, Christoph
name: Wild, Christoph
name: Pernice, Wolfram H. P.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Diamond offers unique material advantages for the realization of micro- and nanomechanical resonators due to its high Young's modulus, compatibility with harsh environments and superior thermal properties. At the same time, the wide electronic bandgap of 5.45eV makes diamond a suitable material for integrated optics because of broadband transparency and the absence of free-carrier absorption commonly encountered in silicon photonics. Here we take advantage of both to engineer full-scale optomechanical circuits in diamond thin films. We show that polycrystalline diamond films fabricated by chemical vapour deposition provide a convenient waferscale substrate for the realization of high quality nanophotonic devices. Using free-standing nanomechanical resonators embedded in on-chip Mach-Zehnder interferometers, we demonstrate efficient optomechanical transduction via gradient optical forces. Fabricated diamond resonators reproducibly show high mechanical quality factors up to 11,200. Our low cost, wideband, carrier-free photonic circuits hold promise for all-optical sensing and optomechanical signal processing at ultra-high frequencies.
Promover a aprendizagem, transformar o ensino: O contributo do projecto "Investigação para um currículo relevante"
Creators: name: Leal, Susana Mira
name: Machado, Odília
name: Monteiro, Mónica
name: Rebelo, Filomena
Publisher: name: Interacções
Year: 2010

description: Este artigo decorre de um projecto de investigação-acção colaborativa designado Investigação para um Currículo Relevante, em curso na Região Autónoma dos Açores, cujos objectivos e procedimentos são mais amplamente explicitados no artigo intitulado “A investigação enquanto prática de deliberação curricular: o caso do projecto ICR”, divulgado no mesmo número desta revista. O texto ilustra as potencialidades dos projectos de investigação-acção na promoção de professores reflexivos, capazes de perspectivar criticamente as suas práticas e contextos específicos no sentido da sua transformação, tendo em vista a promoção da qualidade dos processos educativos e dos resultados escolares dos alunos, particularmente daqueles que registam uma menor afinidade e interesse pela escola e pelas experiências e aprendizagens que aquela lhes proporciona. Ao longo do texto são apresentadas algumas estratégias com potencial no âmbito da promoção da relevância curricular e da significatividade da aprendizagem, decorrentes das acções de experimentação desenvolvidas por quatro dos docentes do Ensino Básico que integram a equipa do projecto ICR. As estratégias descritas (narrativas; trabalho de projecto e resolução de problemas) foram implementadas ao longo do ano lectivo de 2009/2010 em 4 turmas do 1.º e 2.º Ciclos do Ensino Básico e a sua selecção decorreu da observação de manifestações de desinteresse de alguns alunos relativamente à escola e/ou a determinada disciplina em particular, de entrevistas realizadas àqueles alunos e de dados colhidos nos respectivos processos individuais relativamente ao seu percurso escolar, contexto sócio-familiar, interesses e ocupações extra-escolares.
description: Interacções, vol. 6 n.º 15 (2010): Investigação e Prática Profissional: Histórias de Relação como Saber (II).
IMPACT OF AIR POLLUTION ON HEART RATE VARIABILITY (HRV) AND PULMONARY FUNCTION TESTS (PFT)
Creators: name: Dr. Ananya Dubey
name: Dr. Shobitha Muthukrishnan
name: Dr. Shalini Rastogi
Publisher: name: Zenodo
Year: 2024
Subjects: Air Quality, Heart Rate Variability (HRV), Pulmonary Function Tests (PFTs), Particulate Matter (PM2.5, PM10), Cardiovascular Health, Respiratory Health, Chronic Obstructive Pulmonary Disease (COPD), Lung Function, Air Pollution, Autonomic Nervous System, Longitudinal Studies, Short-Term Exposure.

description: Abstract

This review article explores the significant impact of air quality on cardiovascular and respiratory health, focusing on heart rate variability (HRV) and pulmonary function tests (PFTs). Various studies have been analyzed to elucidate both short-term and long-term effects of air pollutants such as PM2.5 and PM10. Key findings indicate that prolonged exposure to fine particulate matter (PM2.5) is associated with a significant decrease in HRV, highlighting chronic cardiovascular risks and autonomic nervous system dysfunction. Short-term exposure to elevated PM levels is linked to rapid declines in HRV, suggesting acute autonomic responses that exacerbate cardiovascular conditions. In terms of pulmonary function, studies reveal that both short-term and long-term exposure to air pollutants significantly impair lung function, as evidenced by declines in forced vital capacity (FVC) and forced expiratory volume in one second (FEV1). Chronic exposure exacerbates conditions such as chronic obstructive pulmonary disease (COPD) and increases the risk of lung cancer mortality. This review underscores the urgent need for improved air quality standards and public health initiatives to mitigate the adverse health impacts of air pollution. Future research should focus on longitudinal studies with larger sample sizes, investigate underlying mechanisms, explore the impact of different pollutants, assess effectiveness of interventions, and ensure findings are generalizable across diverse populations.
As competências que a calculadora gráfica promove no ensino/aprendizagem da matemática: um estudo de caso numa turma do 11.º ano
Creators: name: Silva, Dulce
name: Seixas, Sónia Raquel
Publisher: name: Interacções
Year: 2010

description: Na sociedade em constante mudança onde actualmente vivemos, o acelerado desenvolvimento científico e tecnológico exige uma nova postura da escola na formação dos alunos como cidadãos críticos, activos, esclarecidos e responsáveis, de forma a facilitar-lhes uma plena integração na sociedade. Deste modo, é fundamental a implementação em sala de aula, de mudanças e estratégias de inovação pedagógica que se reconheçam capazes de transformar a escola de modo a obter melhorias significativas na Educação, onde se inclui a integração das novas tecnologias.

Sendo a calculadora gráfica de uso obrigatório na disciplina de Matemática e face às suas potencialidades educativas, no decurso do Ensino Secundário deve ser dada uma especial relevância à sua utilização em sala de aula de modo a estimular nos alunos o desenvolvimento de competências científicas e sociais.

Neste sentido, visando o desenvolvimento de estratégias que conduzam a melhorias significativas no ensino/aprendizagem da Matemática pretende-se, com o presente estudo, identificar as competências desenvolvidas pela utilização desta ferramenta pedagógica.

O estudo incidiu sobre os vinte e dois alunos que constituem uma turma do 11.º ano de escolaridade, com idades compreendidas entre os quinze e os dezassete anos. A metodologia adoptada foi de índole qualitativa e interpretativa, designadamente o estudo de caso, dado que as suas características apontavam este design de investigação como sendo apropriado para o tipo de pesquisa que se pretendia realizar. Os instrumentos utilizados para a recolha de dados basearam-se na observação participante, gravação em vídeo de algumas aulas e na realização de entrevistas semi-estruturadas a todos os alunos da turma.
 Dos resultados obtidos do estudo conclui-se que a utilização da calculadora gráfica beneficiou atitudes mais positivas dos alunos em relação à Matemática, nomeadamente atitudes de persistência na resolução de situações problemáticas, desenvolveu a autonomia e a capacidade de argumentação, o espírito crítico e de iniciativa, o espírito de equipa e cooperação e a auto-confiança. Os alunos salientaram, igualmente, a importância das tarefas a propor em sala de aula, de forma a criar um ambiente mais activo, mais dinâmico e mais estimulante, surgindo este, no seu discurso, como um factor determinante no sucesso das aprendizagens.
description: Interacções, vol. 6 n.º 15 (2010): Investigação e Prática Profissional: Histórias de Relação como Saber (II).
Influence of thermal and resonance neutron on fast neutron flux measurement by Pu-239 fission chamber
Creators: name: zeng, Lina
name: Wang, Qiang
name: Song, Lingli
name: Zheng, Chun
Publisher: name: arXiv
Year: 2014
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: The Pu-239 fission chambers are widely used to measure fission spectrum neutron flux due to a flat response to fast neutrons. However, in the mean time the resonance and thermal neutrons can cause a significant influence on the measurement if they are moderated, which could be eliminated by using B and Cd covers. At a column enriched uranium fast neutron critical assembly, the fission reaction rates of Pu-239 are measured as 1.791*10-16,2.350*10-16 and 1.385*10-15 per second for 15mm thick B cover, 0.5mm thick Cd cover, and no cover respectively. While the fission reaction rate of Pu-239 is rapidly increased to 2.569*10-14 for a 20mm thick polythene covering fission chamber. The average Pu-239 fission cross-section of thermal and resonance neutrons is calculated to be 500b and 24.95b with the assumption of 1/v and 1/E spectra respectively, then thermal, resonance and fast neutron flux are achieved to be 2.30*106,2.24*106 and 1.04*108cm-2s-1.
description: 5 pages, 4 figures, 2 tables, submitted to 'Chinese Physisc C'
Apresentação: A UNESCO e as linguagens dos jovens: novos tempos, novas perspectivas
Creators: name: Defourny, Vincent
Publisher: name: Interacções
Year: 2010

description: A Organização das Nações Unidas para a Educação, a Ciência e a Cultura (UNESCO) está atenta a esses desafios e, por meio do seu programa de Cátedras (UNESCO/UNITWIN), tem procurado fomentar a cooperação internacional e a pesquisa acadêmica de excelência em temáticas atuais e complexas da juventude que tenham a educação, o uso de novas tecnologias e a construção da cultura de paz como base. Nesse sentido, muito nos honra, a convite da Cátedra UNESCO de Juventude, Educação e Sociedade da Universidade Católica de Brasília apresentar a edição 16 da Revista Interacções que, neste número, traz importantes reflexões sobre a relação da escola com as novas linguagens juvenis.
description: Interacções, vol. 6 n.º 16 (2010): Escola e linguagens juvenis: resistência ou abertura ao novo? (I)
Radiation from an emitter revolving around a magnetized non-rotating black hole
Creators: name: Frolov, Valeri P.
name: Shoom, Andrey A.
name: Tzounis, Christos
Publisher: name: arXiv
Year: 2014
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: One of the methods of study of black holes in astrophysics is based on broadening of the spectrum of radiation of ionized Iron atoms. The line K$α$ associated with Iron emission at 6.4 keV is very narrow. If such an ion is revolving around a black hole, this line is effectively broadened as a result of the Doppler and gravitational redshift effects. The profile of the broaden spectrum contains information about the gravitational field of the black hole. In the presence of a regular magnetic field in the vicinity of a black holes the characteristics of the motion of charged ions are modified. In particular, their innermost stable circular orbits become closer to the horizon. The purpose of this work is to study how this effect modifies the spectrum broadening of lines emitted by such an ion. Our final goal is to analyze whether the change of the spectrum profiles can give us information about the magnetic field in the black hole vicinity.
description: 20 pages, 21 figures. arXiv admin note: text overlap with arXiv:1405.0510
Editorial - Escola e linguagens juvenis: resistência ou abertura ao novo?
Creators: name: Gomes, Cândido Alberto
Publisher: name: Interacções
Year: 2010

description: Os resultados dificilmente poderiam ser outros. O acelerador da História afunda cada vez mais, enquanto a globalização e a mundialização se tornam cada vez mais abrangentes e profundas. O encolhimento do tempo e do espaço, o fluxo de valores sociais em mudança e de movimentos contestadores nos conduz a horizontes pouco nítidos, cuja projeção desafia o imaginário. Várias expressões, muitas vezes metafóricas, têm sido utilizadas para representar a complexa realidade de hoje: sociedade de risco, modernização reflexiva, pós-modernidade, modernidade líquida, sociedade em rede, sociedade mundial e outras. A explosão das categorias e valores sociais se afigura também como um terremoto, em que só a instabilidade parece estável.  Com isso, as linguagens têm sofrido transformações mais ou menos revolucionárias. Estabeleceu-se um vórtice de novas tecnologias, difíceis de imaginar há pouco tempo. A “revolução de Gutenberg” mais parece um lento processo diante de inovações que se atropelam na superação e descarte continuados das tecnologias. As novas gerações, nesse contexto, têm dificuldade de acreditar que existam valores éticos comuns, relativamente duradouros, capazes de transcender aos séculos. Comparados aos bens da sociedade de consumo, eles parecem destinados à rápida e programada obsolescência.
description: Interacções, vol. 6 n.º 16 (2010): Escola e linguagens juvenis: resistência ou abertura ao novo? (I)
Militant Rule of Law versus Democratic Backlash
Creators: name: Sajò, András
Publisher: name: Zenodo
Year: 2023

description: András Sajó, Central European University, Militant Rule of Law versus Democratic Backlash 
V Convegno Annuale AISDUE - Padova 2 e 3 Novembre 2023
Il Diritto dell'Unione europea nei rapporti tra ordinamenti: tra collaborazione, integrazione e identità
Sessione 2: I valori dell'Unione come limiti alle scelte costituzionali degli Stati membri
Relazione - Abstract
Conference Editor: Bernardo Cortese, Università degli Studi di Padova - DiPIC
*
Comitato scientifico AISDUE: Antonio Tizzano, Patrizia De Pasquale, Pietro Manzini, Paola Mori, Francesco Rossi Dal Pozzo, Lorenzo Schiano di Pepe, Fabio Spitaleri
Entrevista - The joy of txt. Young people: how does texting affect their use of language?
Creators: name: Crystal, David
Publisher: name: Interacções
Year: 2010

description: The renowned linguist David Crystal, Emmeritus Professor at the University of Wales, in this interview to Mike Pilewski, provides answers to crucial questions on the technologies’ impacts on our language. Banishing every kind of alarmism, he regards that youths and adults read when they are in front of the computer screen. Furthermore, when young people send their text messages, in fact they are writing. They would be unable to do it if they had not acquired a relative domain of orthography. As this technology is recent, it is too early to draw conclusions on their impacts on language, in particular to reach cathastrophic inferences.
description: Interacções, vol. 6 n.º 16 (2010): Escola e linguagens juvenis: resistência ou abertura ao novo? (I)
title: Spectral Projection - Robustness and Orthogonality Considerations
Creators: name: Galgon, Martin
Publisher: name: Bergische Universität Wuppertal
Year: 2020

description: This work deals with a special incarnation of subspace iteration—spectral projection— in order to solve Eigenproblems of standard or generalized form, given by Hermitian matrices or definite matrix pairs. After establishing the general theory, a selection of possible approximations of the ideal filtering function to obtain an approximate projector for a specified spectral target interval is highlighted, and many aspects of the convergence behavior of the resulting methods and its pathological peculiarities are analyzed experimentally. The work touches on implementation aspects and briefly introduces an accompanying software framework for parallel solution of said eigenproblems on large hybrid parallel supercomputers with many cores. In the remainder of the work, the major crucial implication of a parallel implementation that aims to subdivide the target interval for independent computation, the maintenance or reestablishment of orthogonality among the computed eigenvectors of all subintervals, are examined. Many aspects of possible approaches are presented and their feasibility is evaluated.
description: Diese Arbeit beschäftigt sich mit einer speziellen Inkarnation der Unterraumiterationsmethode— spektraler Projektion—zur Lösung von Eigenproblemen in Standardoder verallgemeinerter Form, bestehend aus hermiteschen Matrizen oder definiten Matrixpaaren. Die grundlegende Theorie wird etabliert, eine Auswahl möglicher Näherungen der idealen Filterfunktion zur Konstruktion eines approximativen Projektors für ein vorgegebenes spektrales Zielintervall präsentiert, und viele Aspekte des Konvergenzverhaltens der resultierenden Methode sowie seine pathologischen Absonderlichkeiten durch geeignete Experimente analysiert. Die Arbeit beleuchtet Implementierungsaspekte und eine begleitende Software zur Lösung besagter Eigenprobleme auf großen, hybrid-parallelen Supercomputern mit einer großen Anzahl Kerne wird kurz vorgestellt. Nachfolgend wird die wichtigste Implikation einer parallelen Implementierung, welche versucht, das Zielintervall zur unabhängigen Berechnung in Teilintervalle zu unterteilen, nämlich das Aufrechterhalten oder die Wiederherstellung der Orthogonalität zwischen den Eigenvektoren aller berechneter Teilintervalle, untersucht. Viele Aspekte möglicher Vorgehensweisen werden präsentiert und ihre Verwendbarkeit bewertet.
Met@lenguajes e identidades de los jóvenes contemporáneos: repercusiones  psicosociales y educativas
Creators: name: Moral Jiménez, María De La Villa
Publisher: name: Interacções
Year: 2010

description: En las sociedades massmediáticas y digitalizadas contemporáneas se van instalando nuevas prácticas de interacción comunicativa interpersonal asociadas al auge de herramientas de contacto y a otros dispositivos y redes telemáticas que amplían el espectro comunicativo. De tales instrumentos de acción relacional, así como de los metalenguajes concretos empleados por el colectivo juvenil, de los espacios de encuentro y de seducción tecnocrática se derivan consecuencias psicosociales con un emergente simbolismo en esta ágora electrónica. Buena parte de los procesos comunicativos entre el colectivo juvenil están mediatizados por las singularidades de las relaciones virtuales en el sentido laxo del término, lo cual afecta a procesos psicosociales básicos, tales como el proceso de construcción y redefinición de la identidad, el liderazgo, la popularidad grupal y al ámbito socioafectivo, entre otros. Nuestro objetivo es analizar de un modo comprehensivo, y desde una perspectiva de análisis psicosociológica, los efectos derivados de tales usos/abusos y sus implicaciones educativas. Desde un posicionamiento crítico se propone que los poderes de construcción de discursos, significados, valores y realidades de los medios y de las nuevas tecnologías se encubren bajo una apariencia engañosa (asepsia del discurso, singularidad del contacto mediático, supuesto acceso no restringido, etc.), de los que se derivan ventajas e inconvenientes a nivel identitario y relacional que conviene analizar. Asimismo, se ofrece un análisis de los efectos perversos (en terminología foucaultiana) de la introducción de las nuevas tecnologías en el ámbito académico ante la emergencia de unas nuevas condiciones del hic et nunc de esta subcultura juvenil integrada en una comunidad digitalizada.
description: Interacções, vol. 6 n.º 16 (2010): Escola e linguagens juvenis: resistência ou abertura ao novo? (I)
Scattering and leapfrogging of vortex rings in a superfluid
Creators: name: Caplan, R. M.
name: Talley, J. D.
name: Carretero-Gonzalez, R.
name: Kevrekidis, P. G.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: Pattern Formation and Solitons (nlin.PS)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: The dynamics of vortex ring pairs in the homogeneous nonlinear Schrödinger equation is studied. The generation of numerically-exact solutions of traveling vortex rings is described and their translational velocity compared to revised analytic approximations. The scattering behavior of co-axial vortex rings with opposite charge undergoing collision is numerically investigated for different scattering angles yielding a surprisingly simple result for its dependence as a function of the initial vortex ring parameters. We also study the leapfrogging behavior of co-axial rings with equal charge and compare it with the dynamics stemming from a modified version of the reduced equations of motion from a classical fluid model derived using the Biot-Savart law.
description: 12 pages, 11 figures
Revealing the influence of dark matter on the nature of motion and the families of orbits in axisymmetric galaxy models
Creators: name: Zotos, Euaggelos E.
name: Caranicolas, Nicolaos D.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: An axially symmetric galactic gravitational model composed of a dense, massive and spherical nucleus with an additional dark matter halo component was used, to distinguish between the regular and chaotic character of orbits of stars that move in the meridional plane (R,z). We investigated two different cases: (i) a flat-disk galaxy (ii) an elliptical galaxy. It is of particular interest to reveal how the portion of the dark matter inside the main body of the galaxy influences the ordered or chaotic nature of motion. Varying the ratio of dark matter to stellar mass, we monitored the evolution not only of the percentage of chaotic orbits, but also of the percentages of orbits that compose the main regular resonant families, by classifying regular orbits into different families. Moreover we tried, to reveal how the starting position of the parent periodic orbits of each regular family changes with respect to the fractional portion of dark matter. We compared our results with previous similar work.
description: Published in Astronomy & Astrophysics (A&A) journal. arXiv admin note: previous paper with related context: arXiv:1309.5607
Enhanced subbarrier fusion for proton halo nuclei
Creators: name: Kumar, Raj
name: Lay, J. A.
name: Vitturi, A.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Nuclear Theory (nucl-th)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: In this short note we use a simple model to describe the dynamical effects of break-up processes in the subbarrier fusion involving weakly bound nuclei. We model two similar cases involving either a neutron or a proton halo nucleus, both schematically coupled to the break-up channels. We find that the decrease of the coulomb barrier in the proton break-up channel leads, ceteris paribus, to a larger enhancement of the subbarier fusion probabilities with respect to the neutron-halo case.
description: 4 figures
Beyond the standard approximations: an analysis leading to a correct description of phase instabilities in semiconductor lasers
Creators: name: Gil, L.
name: Lippi, G. L.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Following an overview of modeling of (longitudinal) multimode semiconductor laser dynamics, we analyze in detail a model proposed in 2006 to explain deterministic, phase-locked modal alternation, experimentally observed a decade ago. Through a stability analysis, we prove that the numerically obtained electromagnetic field evolution, interpreted as an explanation of the experiments, is nothing more than an extremely long transient, so long as to be hardly identifiable in an entirely numerical approach. Comparison with a model we have recently derived, which predicts a phase instability (Benjamin-Feir-like) compatible with the experimental observations, highlights the crucial ingredient for the dynamics. The wide spectrum of unstable eigenvalues accompanying the phase instability plays the role of an equivalent noise in a fully deterministic description, thus reconciling the heuristic models which could qualitatively reproduce the experimental observation either with deterministic equations in the presence of mode-coupling, or through stochastically driven modal decompositions.
description: 11 pages. Submitted for the Conference Proceedings of Photonics Europe 2014 -- paper # 9134-38
Photo-induced persistent inversion of germanium in a 200-nm-deep surface region
Creators: name: Prokscha, T.
name: Chow, K. H.
name: Stilp, E.
name: Suter, A.
name: Luetkens, H.
name: Morenzoni, E.
name: Nieuwenhuys, G. J.
name: Salman, Z.
name: Scheuermann, R.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: The controlled manipulation of the charge carrier concentration in nanometer thin layers is the basis of current semiconductor technology and of fundamental importance for device applications. Here we show that it is possible to induce a persistent inversion from n- to p-type in a 200-nm-thick surface layer of a germanium wafer by illumination with white and blue light. We induce the inversion with a half-life of ~12 hours at a temperature of 220 K which disappears above 280 K. The photo-induced inversion is absent for a sample with a 20-nm-thick gold capping layer providing a Schottky barrier at the interface. This indicates that charge accumulation at the surface is essential to explain the observed inversion. The contactless change of carrier concentration is potentially interesting for device applications in opto-electronics where the gate electrode and gate oxide could be replaced by the semiconductor surface.
Association between Comprehensive Sexuality Education and Adolescent Risky Sexual Behavior, Addis Ababa, Ethiopia
Creators: name: Atnafseged, Bethel
Publisher: name: Zenodo
Year: 2017

description: Background: Adolescents transit into adulthood with conflicting and confusing messages about sexuality and gender. They lack adequate information and preparation on sexual and reproductive health (SRH), which leaves them vulnerable to risky sexual behavior, coercion, abuse and exploitation which intern exposes them to unintended pregnancies and sexually transmitted infections (STIs) including HIV/AIDS.

Objective: To assess the association between Comprehensive Sexual Education and Adolescents’ Risky Sexual Behavior among In School Adolescents in Addis Ababa, Ethiopia

Method: The study used a cross sectional study design with internal comparison to assess the association between Comprehensive Sexuality Education and Risky Sexual Behavior. Gullelie sub city was purposively sampled as it was the only sub city that had Comprehensive Sexuality Education given to students. The study was conducted from November 2016-June 2017. Data were collected using structured self-administered questionnaires which was pre-tested on 30 students from non-selected but similar school in the sub city. The collected data were entered into Epi Info version 7 and cleaned before transferring the data to Stata Version 14 for analysis. Bivariate analysis was done to see the association of each independent variable with the outcome variable. Variables with P-Value of <0.25 were considered for multiple logistic regression analysis. In addition to text description, tables and graphs were used to summarize and present the data.
Away games: evaluating the travel behaviour of soccer fans
Creators: name: Ertas, Mehemt
name: Soyler, Soner
name: Sel, Zehra Gokce
Publisher: name: Journal of Tourism & Development
Year: 2019

description: Soccer is a global sport played all around the world. Also, soccer is the most watched sport in the world. Soccer fans are attending a soccer match passively and they support their teams. Fans attend to soccer matches in two ways as home-game and away-game. While home-game is played in the soccer club's own stadium, the away-game includes matches of the soccer club's in the other stadiums. The aim of this research is to reveal the visit intentions and travel patterns of soccer fans. For this purpose, we held face to face interviews with 28 Fenerbahce fans who participated in the Manchester United-Fenerbahce UEFA (Union of Europa Football Association) Europa League match. As a result of the research, it was concluded that soccer fans prefer to the Manchester destination to just watch the soccer match and also, they organized their travel relatively individually. In addition, it revealed that expenditure items of soccer fans are match tickets, flight tickets, accommodation, food and beverages, souvenirs, and special items of soccer teams such as a scarf and team jersey. Lastly, the soccer fans had no intention of revisiting the Manchester destination and they would visit the destination only if there was another match.
description: Journal of Tourism & Development, n.º 32 (2019)
Jóvenes, redes tecnológicas y tramas de sentido
Creators: name: Marí Sáez, Víctor Manuel
Publisher: name: Interacções
Year: 2010

description: Los jóvenes son el segmento de la población que en la actualidad  más intensamente se está apropiando de las redes tecnológicas. Nuestro interés hacia los usos tecnológicos de los jóvenes radica en su dimensión cualitativa y sociocultural, en la medida en que, mediante estos procesos, los jóvenes pueden buscar construir sus identidades y encontrar sentido a sus vidas. Las comunicaciones juveniles son analizadas en el presente artículo teniendo en cuenta, principalmente, sus posibilidades para la construción de redes y para la articulación de tramas de sentido. La lógica de la red es, para autores como Manuel Castells (1997), un término que remite más allá de la dimensión tecnológica, y que apunta  a las nuevas lógicas de relación y de comunicación que toman cuerpo en el nuevo entorno social, político y cultural de la globalización. Los dispositivos tecnológicos actuales crean espacios no territoriales que facilitan la interactividad, y cuyas referencias no son necesariamente geográficas, sino más bien los gustos, las motivaciones o los deseos compartidos. Sin embargo, la abundancia  de canales tecnológicos y la intensidad de su uso por parte de los jóvenes  convive con la corrosión del carácter (Sennet, 2000) y con la disolución de algunos vínculos sociales necesarios para el desarrollo personal y colectivo.
description: Interacções, vol. 6 n.º 16 (2010): Escola e linguagens juvenis: resistência ou abertura ao novo? (I)
Las nuevas tecnologías y la comunicación de jóvenes y adolescentes. Usos y discursos
Creators: name: Bañón Hernández, Antonio M.
Publisher: name: Interacções
Year: 2010

description: Tras reflexionar sobre la comunicación juvenil y los nuevos medios de comunicación, en este artículo analizaremos, a partir de un cuestionario presentado a alumnos españoles matriculados en dos centros de enseñanza secundaria de la provincia de Almería (España), por un lado, el dominio que dicen tener nuestros jóvenes y adolescentes de las nuevas tecnologías en comparación con los adultos, haciendo especial referencia a sus padres y a sus profesores; y, por otro lado, el tipo de conexión a Internet del que disponen estos jóvenes, los usos que dan a esa conexión y el tiempo que suelen dedicar al día a navegar por la Red. El cuestionario ha sido respondido, en primer lugar, por alumnos y alumnas de un instituto público situado en una ciudad del poniente almeriense, en donde aparece un notable porcentaje de alumnos inmigrados de otros países o que pertenecen a familias cuyos padres inmigraron a Almería años atrás. Y, en segundo lugar, por jóvenes de un instituto concertado de la capital almeriense en donde el perfil del alumnado es, en principio, muy diferente, dado que, entre otras cosas, apenas hay presencia de chicos y chicas de origen inmigrante.
description: Interacções, vol. 6 n.º 16 (2010): Escola e linguagens juvenis: resistência ou abertura ao novo? (I)
A new measurement of the rare decay eta -> pi^0 gamma gamma with the Crystal Ball/TAPS detectors at the Mainz Microtron
Creators: name: Nefkens, B. M. K.
name: Prakhov, S.
name: Aguar-Bartolomé, P.
name: Annand, J. R. M.
name: Arends, H. J.
name: Bantawa, K.
name: Beck, R.
name: Bekrenev, V.
name: Berghäuser, H.
name: Braghieri, A.
name: Briscoe, W. J.
name: Brudvik, J.
name: Cherepnya, S.
name: Codling, R. F. B.
name: Collicott, C.
name: Costanza, S.
name: Danilkin, I. V.
name: Denig, A.
name: Demissie, B.
name: Dieterle, M.
name: Downie, E. J.
name: Drexler, P.
name: Fil'kov, L. V.
name: Fix, A.
name: Garni, S.
name: Glazier, D. I.
name: Gregor, R.
name: Hamilton, D.
name: Heid, E.
name: Hornidge, D.
name: Howdle, D.
name: Jahn, O.
name: Jude, T. C.
name: Kashevarov, V. L.
name: Käser, A.
name: Keshelashvili, I.
name: Kondratiev, R.
name: Korolija, M.
name: Kotulla, M.
name: Koulbardis, A.
name: Kruglov, S.
name: Krusche, B.
name: Lisin, V.
name: Livingston, K.
name: MacGregor, I. J. D.
name: Maghrbi, Y.
name: Mancel, J.
name: Manley, D. M.
name: McNicoll, E. F.
name: Mekterovic, D.
name: Metag, V.
name: Mushkarenkov, A.
name: Nikolaev, A.
name: Novotny, R.
name: Oberle, M.
name: Ortega, H.
name: Ostrick, M.
name: Ott, P.
name: Otte, P. B.
name: Oussena, B.
name: Pedroni, P.
name: Polonski, A.
name: Robinson, J.
name: Rosner, G.
name: Rostomyan, T.
name: Schumann, S.
name: Sikora, M. H.
name: Starostin, A.
name: Strakovsky, I. I.
name: Strub, T.
name: Suarez, I. M.
name: Supek, I.
name: Tarbert, C. M.
name: Thiel, M.
name: Thomas, A.
name: Unverzagt, M.
name: Watts, D. P.
name: Werthmüller, D.
name: Witthauer., L.
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: A new measurement of the rare, doubly radiative decay eta->pi^0 gamma gamma was conducted with the Crystal Ball and TAPS multiphoton spectrometers together with the photon tagging facility at the Mainz Microtron MAMI. New data on the dependence of the partial decay width, Gamma(eta->pi^0 gamma gamma), on the two-photon invariant mass squared, m^2(gamma gamma), as well as a new, more precise value for the decay width, Gamma(eta->pi^0 gamma gamma) = (0.33+/-0.03_tot) eV, are based on analysis of 1.2 x 10^3 eta->pi^0 gamma gamma decays from a total of 6 x 10^7 eta mesons produced in the gamma p -> eta p reaction. The present results for dGamma(eta->pi^0 gamma gamma)/dm^2(gamma gamma) are in good agreement with previous measurements and recent theoretical calculations for this dependence.
description: 10 pages, 8 figures, 1 table
MPEC 2023-E48 : 2022 UV27
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2023
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Near-field microscopy with a single-photon point-like emitter: Resolution versus the aperture tip?
Creators: name: Drezet, A.
name: Cuche, A.
name: Huant, S.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Quantum Physics (quant-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We discuss theoretically the concept of spatial resolution in near-field scanning optical microscopy (NSOM) in light of a recent work [Opt. Express 17 (2009) 19969] which reported on the achievement of active tips made of a single ultrasmall fluorescent nanodiamond grafted onto the apex of a substrate tip and on their validation in NSOM imaging. Since fluorescent nanodiamonds tend to decrease steadily in size, we assimilate a nanodiamond-based tip to a point-like single photon source and compare its ultimate resolution with that offered by standard metal-coated aperture NSOM tips. We demonstrate both classically and quantum mechanically that NSOM based on a point-like tip has a resolving power that is only limited by the scan height over the imaged system whereas the aperture-tip resolution depends critically on both the scan height and aperture diameter. This is a consequence of the complex distribution of the electromagnetic field around the aperture that tends to artificially duplicate the imaged objects. We show that the point-like tip does not suffer from this "squint" and that it rapidly approaches its ultimate resolution in the near-field as soon its scan height falls below the distance between the two nano-objects to be resolved.
UNDERSTANDING MILLENNIAL GENERATION ORGANIZATIONAL SOCIAL EXCHANGE THROUGH PSYCHOLOGICAL CONTRACT
Creators: name: Muhamad Imam Syairozi
name: R. Rozaini
name: Luluk Nur Azizah
Publisher: name: Zenodo
Year: 2023
Subjects: Psychological Contract, Job Satisfaction, Work Engagement, Millennial Generation, Civil Servant

description: Abstract 
The rise of the millennial generation, especially in Indonesia, has overtaking the majority of various workplaces. Millennial workers are likely to have different characteristics from the previous generation, so the leader needs to adjust the treatment to create millennials' job satisfaction and engagement. This study aimed to analyze the effect of psychological contracts on work engagement with job satisfaction as a mediating variable. This study used an explanatory method with a quantitative approach. The data was collected using a questionnaire and was analyzed using Partial Least Square software. There were four main findings in the study. First, psychological contracts, both transactional and relational, had a significant effect on job satisfaction. Second, transactional psychological contracts had a significant effect on work engagement. Third, job satisfaction mediated the relationship between transactional and relational psychological contracts with work engagement. Fourth, the rational psychological contract was not the main factor in increasing work engagement.
Nuevas formas de comunicación juvenil en la producción textual
Creators: name: Fuenmayor, Gloria
name: Villasmil, Yeriling
Publisher: name: Interacções
Year: 2010

description: En este trabajo se analiza cómo los estudiantes del primer semestre de la Escuela de Educación de la Universidad del Zulia, hacen uso de nuevas formas de escritura  en la producción de textos construidos en el aula, influenciados por los medios digitales. La fundamentación teórica de la investigación se sustenta en autores como Barrera (2005), Chela-Flores (2006), Domínguez (2005), Betti (2006), Franco (2007), Niño (2007). La investigación se ubica dentro del paradigma cualitativo y es de carácter descriptiva y analítica. Para alcanzar el objetivo se les solicitó a 30 estudiantes  redactaran un texto, cuyos temas escogieron libremente. Luego se analizaron todos los textos construidos, extrayendo de cada uno, las nuevas formas de escritura que trasladaron estos estudiantes influenciados por los medios digitales a los textos escritos en clases. El análisis arrojó que lo más significativo en esta investigación es la persistencia del uso oral del lenguaje en textos escritos en el ámbito académico, pero en este caso con mayores consecuencias, en vista de que las nuevas formas para expresarse que utilizan los jóvenes al escribir a través de los medios digitales, las transfieren a los textos que producen en el aula. Se concluye que, los estudiantes deben poseer conocimientos y capacidad para utilizar el lenguaje cuando la situación y el contexto lo requiera y, para ello, el papel del docente es clave.
description: Interacções, vol. 6 n.º 16 (2010): Escola e linguagens juvenis: resistência ou abertura ao novo? (I)
Realising the DARIAH dream: enabling humanities research in the digital age: from general principles to practical considerations
Creators: name: Gray, Edward
name: Chambers, Sally
Publisher: name: Zenodo
Year: 2022
Subjects: research infrastructure
digital humanties

description: Presentation given during UNED DARIAH Day, 15 September 2022, about the vision of DARIAH ERIC, as well as the practical application of this dream.
Axial Dark Matter: the case for an invisible Z'
Creators: name: Lebedev, Oleg
name: Mambrini, Yann
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We consider the possibility that fermionic dark matter (DM) interacts with the Standard Model fermions through an axial Z' boson. As long as Z' decays predominantly into dark matter, the relevant LHC bounds are rather loose. Direct dark matter detection does not significantly constrain this scenario either, since dark matter scattering on nuclei is spin--dependent. As a result, for a range of the Z' mass and couplings, the DM annihilation cross section is large enough to be consistent with thermal history of the Universe. In this framework, the thermal WIMP paradigm, which currently finds itself under pressure, is perfectly viable.
description: 10 pages, 2 figures
Le langage SMS: sous-produit de l’oral et de l’ecrit ou veritable langage ecrit?
Creators: name: Aziza, Zouhour Messili-Ben
Publisher: name: Interacções
Year: 2010

description: Le langage SMS : sous-produit de l’oral et de l’écrit ou véritable langage écrit ? Ce travail analyse les caractéristiques et les implications du langage SMS et du français utilisé par les jeunes des banlieues urbaines d'origine immigrée. Tous deux provoquent des réactions opposées, les unes en défense de la langue, contre sa "corruption", et d'autres qui les tiennent pour des facteurs d'enrichissement de la langue. Néanmoins ces deux langages, amplement utilisés par les jeunes – bien que par un groupe d'âge différent dans le premier cas – non seulement suivent des règles reconnaissables, mais agissent comme un facteur d'identification et de cohésion de groupes sociaux. Il en ressort une sorte de jeu du chat et de la souris, dans lequel les jeunes créent de nouvelles expressions au fur et à mesure que les plus anciennes se disséminent  au point d'être utilisées par les médias. Dans le cas du langage SMS, qui vise à raccourcir et à simplifier la rédaction, il se pourrait qu'il contribue à une éventuelle réforme de l'orthographe. La linguistique reconnaît depuis toujours l'existence de différents niveaux de langage que l'on emploie conformément à la situation et au destinataire du message.  Ce qui s'applique à la langue orale pourrait aussi s'appliquer à la langue écrite, ce qui impliquerait des changements didactiques de l'enseignement de l'écrit. Ces langages très innovants ont donc le mérite de renouveler la langue française, même si les termes ou les techniques n'en sont pas permanentes. Cela signifie que les éducateurs chargés d'intéresser les élèves non francophones à la langue et à la culture française doivent être sensibles à la langue des banlieues et au langage SMS pour leur permettre une véritable communication avec les jeunes français de toutes les origines.
description: Interacções, vol. 6 n.º 16 (2010): Escola e linguagens juvenis: resistência ou abertura ao novo? (I)
Enhanced aodv route discovery and route establishment for qos provision for real time transmission in manet
Creators: name: Ahmad, Iftikhar
name: Ashraf, Uzma
name: Anum, Sadia
name: Tahir, Hira
Publisher: name: arXiv
Year: 2014
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: MANET is a temporary connection of mobile nodes via wireless links having no centralized base station. We developed a protocol with an enhanced route discovery mechanism that avoids the pre-transmission delay. When a source node wants to communicate with another node, it broadcast RREQ. EAODV give priority to the source node of real time transmission. When RREQ packet send to neighbor node, for real time transmission it accept route request on priority basis and the drop ratio of packets decreased, then throughput increases by receiving more packets at destination and delivery ratio also increased through these QOS improved.
description: 9 pages Published In IJCNC journal 3 figures and two tables
Reprodução de dois artigos publicados em El Sol, Mendoza, Argentina: "Generación del bicentenario y Facebook" e "La nueva cíber-ciudadanía"
Creators: name: Castro Santander, Alejandro
Publisher: name: Interacções
Year: 2010

description: La utilización de las redes sociales ha crecido en los últimos años hasta convertirse en una referencia de comunicación por internet. Paralelamente, se ha producido un debate social sobre la conveniencia de estas redes, especialmente entre los jóvenes, por sus posibles consecuencias legales o familiares, "en casa me dejan". La rápida transformación de los valores familiares durante las últimas décadas ha provocado cambios en los roles paternos, donde los padres exigentes se van desdibujando y surgen otros excesivamente permisivos. Una generación de padres dóciles, con hijos que se van acostumbrando a no aceptar órdenes ni exigencias.
description: Interacções, vol. 6 n.º 16 (2010): Escola e linguagens juvenis: resistência ou abertura ao novo? (I)
Tão diferentes e tão iguais: os Millennials e a mobilidade no turismo
Creators: name: Castela, Ana
name: Costa, Carlos
Publisher: name: Revista Turismo & Desenvolvimento
Year: 2019

description: Este artigo tem como objetivo conhecer os estilos de vida da primeira geração de nativos digitais, os Millennials, portugueses, a sua mobilidade e os seus comportamentos sempre que fazem turismo. O turismo tem sido um dos motores do crescimento e do desenvolvimento económico ao nível global. Segundo a UNWTO 2018 acabou com 1, 4 bilhões de chegadas internacionais tendo sido o ano mais forte depois de 2010. A Europa atingiu o número recorde de chegadas no valor de 713 milhões com um aumento de procura de 6% relativamente ao ano anterior (UNWTO, 2019). Estes números devem-se, em parte, à mobilidade deste grupo geracional, mobilidade esta que é, na sociedade contemporânea, como uma componente da própria vida social. Nascidos após a Revolução Tecnológica e das Comunicações, cresceram num contexto em que se dá uma mudança a que podemos mesmo chamar um novo paradigma cultural. Esta mudança traz outros estilos de vida, profundamente ligados às novas tecnologias e que são simbolicamente representados por comportamentos, palavras e rituais pelo que as identidades deixam de ser únicas e fixas e transformam-se. Se a modernidade tem por base a razão, a sociedade contemporânea põe em primeiro lugar a emoção. Representam a geração do futuro e daí ser importante saber como se comportam, quais são os seus estilos de vida e como usam tanto a mobilidade física como a mobilidade tecnológica e virtual, pois na sociedade contemporânea, com valores diversos, a mobilidade é para os Millennials como que um 'estilo de vida'. Para percebermos como os Millennials portugueses se deslocam e o que procuram utilizámos um questionário que foi aplicado online, tendo sido respondido por 269 indivíduos. Deste estudo podemos concluir que esta geração portuguesa tem realmente comportamentos e estilos de vida diferentes mesmo dentro da sua própria geração e usam a cidade, enquanto turistas, de uma maneira distinta, optando preferencialmente por um turismo baseado em experiências ou seja um turismo experiencial.
description: Revista Turismo & Desenvolvimento, n.º 32 (2019)