cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Experimental study on edge energetic electrons in EXL-50 spherical torus
Creators: name: Guo, Dong
name: Shi, Yuejiang
name: Liu, Wenjun
name: Song, Yunyang
name: Sun, Tiantian
name: Liu, Bing
name: Li, Yingying
name: Tian, Xiaorang
name: Zhang, Guosong
name: Xie, Huasheng
name: Peng, Y. K. Martin
name: Liu, Minsheng
Publisher: name: arXiv
Year: 2021
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: A significant number of confined energetic electrons have been observed outside the Last Closed Flux Surface (LCFS) of the solenoid-free, ECRH sustained plasmas in the EXL-50 spherical torus. Several diagnostics have been applied, for the first time, to investigate the key characters of energetic electrons. Experiments reveal the existence of high-temperature low density electrons, which can carry relatively a large amount of the stored energy. The boundary between the thermal plasma and the energetic electron fluid appears to be clearly separated and the distance between the two boundaries can reach tens of centimeters (around the size of the minor radius of the thermal plasma). This implies that the Grad-Shafranov equilibrium is not suitable to describe the equilibrium of the EXL-50 plasma and a multi-fluid model is required. Particle dynamics simulations of full orbits show that energetic electrons can be well confined outside the LCFS. This is consistent with the experimental observations.
3D arrangement of epitaxial graphene conformally grown on porousified crystalline SiC
Creators: name: Veronesi, Stefano
name: Pfusterschmied, Georg
name: Fabbri, Filippo
name: Leitgeb, Markus
name: Arif, Omer
name: Arenas, Daniel Esteban
name: Bals, Sara
name: Schmid, Ulrich
name: Heun, Stefan
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: Nanoporous materials represent a versatile solution for a number of applications ranging from sensing, energy applications, catalysis, drug delivery, and many others. The synergy between the outstanding properties of graphene with a three-dimensional porous structure, circumventing the limits of its 2D nature, constitutes therefore a breakthrough for many fields. We report the first three-dimensional growth of epitaxial graphene on a porousified crystalline 4H-SiC(0001). The wafer porosification is performed via a sequence of metal-assisted photochemical and photoelectrochemical etching in hydrofluoric acid based electrolytes. Pore dimensions of the matrix have been evaluated by electron tomography resulting in an average diameter of 180 nm. Graphene growth is performed in an ultra high vacuum environment at a base pressure of $10^{-11}$ mbar. The graphene growth inside the pores is uniform as confirmed by Transmission Electron Microscopy (TEM) analysis. Raman spectroscopy confirms the high quality of the graphene with a 2D/G ratio $>1$ and an average graphene crystal size of $\approx$ 100 nm. Furthermore, it demonstrates a uniform coverage of graphene across the whole sample area. The surface-to-volume ratio of this novel material, its properties, the tunability of the pore size and the scalability of the surface porosification process offer a game changing perspective for a large number of applications.
Uma nova metodologia dinâmica para simular o estado ecológico dos ecossistemas
Creators: name: Cabral, João Alexandre
name: Cabecinha, Edna
name: Santos, Mário
name: Travassos, Paulo
name: Santos, Pedro Silva
Publisher: name: Revista Captar: Ciência e Ambiente para Todos
Year: 2009

description: Uma nova metodologia estocástico-dinâmica (Stochastic-Dynamic Methodology - StDM) tem sido desenvolvida com base na premissa de que padrões estatísticos gerais, ao nível das relações causa-efeito dos fenómenos ecológicos, incluindo os de cariz aleatório (ou estocástico), são indícios da dinâmica de processos complexos à escala global (ouholística) dos ecossistemas. O presente artigo descreve, de forma simples e intuitiva, a base teórica e os procedimentos inerentes à StDM, incluindo os fundamentos de modelação e o enquadramento estatístico respectivo. Para efeitos de demonstração, foram seleccionados casos de estudo que ilustram a aplicação académica e o uso efectivo de modelos de gestão no âmbito de programas de monitorização da integridade ecológica dos ecossistemas. De facto, a StDM tem sido testada em vários tipos de ecossistemas, nomeadamente em agroecossistemas onde a alteração das práticas agrícolas induziu perturbações ecológicas relevantes e em sistemas aquáticos onde a problemática do bom estado ecológico/qualidade da água foi avaliado ao nível de bacias hidrográficas, rios, albufeiras e estuários. A validação das simulações produzidas tem sido encorajadora pois tem demonstrado a capacidade da StDM em captar a dinâmica deprocessos holísticos dos ecossistemas estudados, prevendo com sucesso o padrão de comportamento de componentes chave em cenários ambientais muito complexos e variáveis.
description: Revista Captar: Ciência e Ambiente para Todos, vol. 1 n.º 1 (2009)
Additional file 2: of Effects of acupuncture on vascular dementia (VD) animal models: a systematic review and meta-analysis
Creators: name: Zhang, Ze-Yu
name: Liu, Zhe
name: Deng, Hui-Hui
name: Chen, Qin
Publisher: name: figshare
Year: 2018
Subjects: Medicine
Biological Sciences not elsewhere classified
Developmental Biology
Science Policy

description: Search Strategies. (DOCX 12 kb)
Editorial
Creators: name: Santos, Paulo Talhadas
name: Azeiteiro, Ulisses Miranda
Publisher: name: Revista Captar: Ciência e Ambiente para Todos
Year: 2014

description: A literacia ambiental (LA) constitui-se como a parte do conhecimento e valores que o cidadão possui em relação ao ambiente, e integra as atitudes que o indivíduo toma perante o meio. O lugar privilegiado para o desenvolvimento da LA continua a ser a escola. Mas um grande desafio se coloca à escola: como desenvolver a literacia ambiental dos seus alunos? Certamente, passa primeiro pela LA dos professores. Estes, agentes de mudança, têm que preparar-se para esta transformação, desenvolvendo a adquirindo competências para poderem dar resposta à necessidade de proporcionar os mecanismos conducentes a uma elevada LA dos alunos e, consequentemente, dar-lhes preparação para o seu bom desempenho como cidadãos. [...]
description: Revista Captar: Ciência e Ambiente para Todos, vol. 5 n.º 1 (2014): Volume Especial: Literacia Ambiental
Two complementary relations for the Rogers-Ramanujan continued fraction
Creators: name: Jha, Sumit Kumar
Publisher: name: arXiv
Year: 2021
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 11Y65

description: Let $R(q)$ be the Rogers-Ramanujan continued fraction. We give different proofs of two complementary relations for $R(q)$ given by Ramanujan and proved by Watson and Ramanathan. Our proofs only use product expansions for classical Jacobi theta functions.
Engineering holographic flat fermionic bands
Creators: name: Grandi, Nicolás
name: Juričić, Vladimir
name: Landea, Ignacio Salazar
name: Soto-Garrido, Rodrigo
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: In electronic systems with flat bands, such as twisted bilayer graphene, interaction effects govern the structure of the phase diagram. In this paper, we show that a strongly interacting system featuring fermionic flat bands can be engineered using the holographic duality. In particular, we find that in the holographic nematic phase, two bulk Dirac cones separated in momentum space at low temperature, approach each other as the temperature increases. They eventually collide at a critical temperature yielding a flattened band with a quadratic dispersion. On the other hand, in the symmetric (Lifshitz) phase, this quadratic dispersion relation holds for any finite temperature. We therefore obtain a first holographic, strong-coupling realization of a topological phase transition where two Berry monopoles of charge one merge into a single one with charge two, which may be relevant for two- and three-dimensional topological semimetals.
description: 6 pages, 3 figures
Detección del coronavirus SARS-CoV-2 mediante ensayo de PCR múltiplex (Práctica en laboratorio virtual Cibertorio)
Creators: name: Herráez, Angel
Publisher: name: Zenodo
Year: 2020

description: Guión de trabajo para el laboratorio virtual «Cibertorio» en Biomodel.UAH.es La identidad de una infección vírica se puede verificar detectando la presencia del material genético del virus en muestras tomadas al paciente. En concreto, este ensayo se centra en la detección de secuencias propias del RNA genómico de SARS-CoV-2, el coronavirus causante de la pandemia COVID-19 que apareció a finales de 2019 y se extendió por todo el mundo en 2020. La identidad del virus se confirma en comparación con secuencias genómicas del influenzavirus A H1N1, causante de la gripe común que tiene síntomas iniciales similares. Como control para verificar la amplificación por PCR se utiliza un gen humano constitutivo, el de la gliceraldehído-3-fosfato deshidrogenasa Como material de partida disponemos de muestras de cDNA (virtuales) preparado a partir del RNA contenido en muestras tomadas de la mucosa de seis pacientes con síntomas de gripe. Objetivo: identificar, en su caso, la infección empleando varios cebadores para PCR dirigidos a regiones del genoma humano, del virus A de la gripe y del coronavirus.
Supplementary Material 2_Validation
Creators: name: Jianxing Yu
Publisher: name: figshare
Year: 2016
Subjects: subject: 111711 Health Information Systems (incl. Surveillance)
subject: FOS: Health sciences
subject: 111706 Epidemiology

description: This file contains information that used to validate retrospectively collected medical records in sentinel-based survellance study of diarrhea in Pudong.
Effective dose fractionation schemes of radiotherapy for prostate cancer
Creators: name: Alvarez, Jose
name: Storey, Kathleen M.
name: Kannan, Pavitra
name: Cho, Heyrim
Publisher: name: arXiv
Year: 2021
Subjects: subject: Medical Physics (physics.med-ph)
subject: Populations and Evolution (q-bio.PE)
subject: FOS: Physical sciences
subject: FOS: Biological sciences
subject: 92B05

description: Radiation therapy has remained as one of the main cancer treatment modalities and a highly cost-effective single modality treatment of cancer care. Typical regimens for fractionated external beam radiotherapy comprise a constant dose administered on weekdays, and no radiation on weekends. However, every patient has a tumor with distinct properties depending on intra-tumor heterogeneity, aggressiveness, and interactive properties with other cells that may make it more resistant or sensitive to radiation treatment. Accordingly, the concept of personalized cancer treatment is emerging to specialize each patient treatment case to the unique properties of the tumor. In this paper, we examine adaptive radiation treatment strategies for heterogeneous tumors using a dynamical system model that consists of radiation-resistant and parental cell populations with unique interactive properties. We study different adaptive dosage strategies for PC3 and DU145 prostate cancer cell lines. We show that stronger doses of radiation given in longer time intervals, while keeping the overall dosage the same, reduce final tumor volume by more than half in PC3 cell lines, but by only five percent in DU145 cell lines. In addition, we tested an adaptive dosing schedule by administering a stronger dosage on Friday to compensate for the treatment-off period during the weekend, which was effective in decreasing the final tumor volume of both cell lines. This result creates interesting possibilities for new radiotherapy strategies at clinics that cannot provide treatment on weekends. Finally, we propose a dosage plan incorporating our findings.
description: 15 pages, 9 figures
Has “Grain for Green” threaten food security on the Loess Plateau of China?
Creators: name: Shi, Peng
name: Feng, Zhaohong
name: Gao, Haidong
name: Li, Peng
name: Zhang, Xiaoming
name: Zhu, Tiantian
name: Li, Zhanbin
name: Xu, Guoce
name: Ren, Zongping
name: Xiao, Lie
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Biochemistry
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Environmental Sciences not elsewhere classified
subject: Ecology
subject: Sociology
subject: FOS: Sociology
subject: Biological Sciences not elsewhere classified
subject: Mental Health

description: There is debating over the question of whether the large-scale ‘Grain for Green’ program on the Loess Plateau of China threatens regional food security. Self-sufficiency index and cropland pressure index were used to assess food security on the Loess Plateau after the implementation of revegetation program. The results showed that the ‘Grain for Green’ program initially had a considerable impact on regional food security, where grain yield fell from 1999 to 2001, resulting in a lower grain self-sufficiency and increased farmland stress. Subsequently, grain yield in this region increased due to the elevated agricultural material input and increased construction of terraces and check dams. The grain self-sufficiency index would have increased to 96.55% if there were improvements to the agricultural conditions, such as fertilization and irrigation, which would have resulted in an increase in the crop yield per unit of 20%. However, the grain self-sufficiency increased to 105.25% via the construction of terraces and check dams. Thus, the government should further expand the ‘Grain for Green’ program in coordination with improvements to the agricultural production conditions and the construction of terraces and check dams on the Loess Plateau.
Search for long-lived particles decaying into muon pairs in proton-proton collisions at $\sqrt{s} =$ 13 TeV collected with a dedicated high-rate data stream
Creators: name: CMS Collaboration
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: A search for long-lived particles decaying into muon pairs is performed using proton-proton collisions at a center-of-mass energy of 13 TeV, collected by the CMS experiment at the LHC in 2017 and 2018, corresponding to an integrated luminosity of 101 fb$^{-1}$. The data sets used in this search were collected with a dedicated dimuon trigger stream with low transverse momentum thresholds, recorded at high rate by retaining a reduced amount of information, in order to explore otherwise inaccessible phase space at low dimuon mass and nonzero displacement from the primary interaction vertex. No significant excess of events beyond the standard model expectation is found. Upper limits on branching fractions at 95% confidence level are set on a wide range of mass and lifetime hypotheses in beyond the standard model frameworks with the Higgs boson decaying into a pair of long-lived dark photons, or with a long-lived scalar resonance arising from a decay of a b hadron. The limits are the most stringent to date for substantial regions of the parameter space. These results can be also used to constrain models of displaced dimuons that are not explicitly considered in this paper.
description: Replaced with the published version. Added the journal reference and the DOI. All the figures and tables, including additional supplementary figures and tables, can be found at http://cms-results.web.cern.ch/cms-results/public-results/publications/EXO-20-014 (CMS Public Pages) This version corrects the metadata
Estudo in situ do efeito de herbicidas numa microalga
Creators: name: Marques, Catarina R.
name: Pereira, Ruth
name: Antunes, Sara C.
name: Cachada, Anabela
name: Duarte, Armando C.
name: Gonçalves, Fernando
Publisher: name: Revista Captar: Ciência e Ambiente para Todos
Year: 2009

description: A utilização de pesticidas em agroecossistemas orizícolas constitui uma ameaça à biodiversidade que sustentam, afectando organismos não alvo que habitam os sistemas aquáticos circundantes. Assim sendo, o objectivo deste estudo consistiu em efectuar a avaliação in situ, numa escala temporal, do efeito da aplicação de herbicidas na qualidade de um agroecossistema localizado no vale do Mondego. Neste sentido, seleccionaram-se dois locais numa vala principal, a qual atravessa a montante (L1) uma zona protegida – Paul do Taipal – e a jusante (L2) é rodeada por campos agrícolas essencialmente destinados à produção de arroz. O estudo envolveu a realização de análises físico-químicas e de ensaios in situ com a microalga Pseudokirchneriella subcapitata (células imobilizadas em esferas de alginato). Deste modo, verificou-se que ocorreu uma diminuição geral da qualidade do sistema aquático, principalmente no local mais exposto (L2) à entrada de herbicidas aquando da sua aplicação. Este cenário foi corroborado pela quantificação de herbicidas em amostras de água recolhidas em L2 (na ordem de μg L-1), mas também pela inibição significativa do crescimento de P. subcapitata com o início da aplicação de herbicidas. Muito embora seja difícil estabelecer relações causa-efeito, esta abordagem evidenciou que a ocorrência de concentrações elevadas de herbicidas nos sistemas aquáticos, ainda que ocasionalmente, pode influenciar o equilíbrio de populações naturais.
description: Revista Captar: Ciência e Ambiente para Todos, vol. 1 n.º 1 (2009)
Supplementary Material 1_HUAS.docx
Creators: name: Jianxing Yu
Publisher: name: figshare
Year: 2016
Subjects: subject: 111711 Health Information Systems (incl. Surveillance)
subject: FOS: Health sciences
subject: 111706 Epidemiology

description: This file contains information that defines the catchment population for 10 hospitals that conducted diarrhea surveillance from Jan. 1st 2012 through Dec. 31st 2013 at Pudong.
Testes de evitamento com enquitraídeos (Enchytraeus albidus): efeitos de diferentes tempos de exposição, compostos químicos e propriedades do solo
Creators: name: Novais, Sara
name: Amorim, Mónica J. B.
name: Römbke, Jörg
name: Soares, Amadeu M. V. M.
Publisher: name: Revista Captar: Ciência e Ambiente para Todos
Year: 2009

description: Os enquitraídeos são oligoquetas típicos do solo que regulam indirectamente a degradação da matéria orgânica e promovem um bom arejamento do solo. Possuem órgãos sensoriais, sensíveis a substâncias químicas no ambiente – quimioreceptores – o que os torna apropriados como organismos teste em ensaios de evitamento. Estes ensaios baseiam-se na capacidade que os organismos têm de evitar uma determinada condição de stress. Os ensaios de evitamento permitem assim uma primeira avaliação datoxicidade de um solo contaminado, usando como parâmetro o comportamento dos enquitraídeos – se estes preferem deslocar-se para o solo controlo ou para o solo contaminado. Este estudo teve como objectivos a optimização do tempo de duração de um teste de evitamento e a determinação dos efeitos de substâncias químicas (metais pesados e pesticidas) e de diferentes propriedades do solo (pH, conteúdo em matéria orgânica e argila) em Enchytraeus albidus. Os resultados mostraram que 48 horas constituem um tempo de exposição óptimo para este tipo de teste. Foram encontrados efeitos relacionados com a concentração aplicada, para a maioria dos compostos testados. As propriedades do solo, por si só, influenciaram o comportamento dos organismos pelo que o tipo de solo a utilizar deve ser tido em conta na interpretação dos resultados.
description: Revista Captar: Ciência e Ambiente para Todos, vol. 1 n.º 1 (2009)
title: 01_1547
Creators: name: Wesley Baldwin, John
name: Baldwin, John W.
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2018
Subjects: subject: LaMOP
subject: Laboratoire de Médiévistique Occidentale de Paris

description: L'ensemble de ces notes ont été crée par John Baldwin lors d'une de ses premières périodes de résidence à Paris. Ces documents comprennent tous les magistri qu’il avait pu rencontrer dans ses sources. Aux XIIème et XIIIème siècles, les universités n'existant pas encore, le titre de magister s'il évoque certainement une compétence n'est pas rattaché de façon systématique au passage par les écoles. De surcroît, les magistris sont le plus souvent désignés par leur seul prénom. La lecture de ces données est donc difficile et suppose un long travail pour tenter d'identifier un individu auquel on pourrait rattacher plusieurs mentions. John Baldwin avait donc renoncé à utiliser ces données pour donner un prolongement à sa magnifique étude sur les gradués d'université et leur emploi par les Capétiens et les Plantagenêts. Néanmoins, il a conservé ces données et elles sont potentiellement très utile dans le cadre de Studium, comme le sont toutes les mentions dans les volumes des Fasti Ecclesiae Gallicanae de chanoines portant ce titre de magister sans autres précisions. L'ampleur des dépouillements rend ces données très utiles et nous devons une grande reconnaissance à John Baldwin pour avoir pris la peine de faire photocopier ses fiches et de nous les avoir transmises amicalement.
Les données ainsi que les images des fiches sont accessibles sur le site Internet à l'adresse suivante : http://studium-baldwin.lamop.fr/.
Les transcriptions des fiches ont été effectuées par des étudiants de Paris 1 Panthéon - Sorbonne mais elles n'ont pas été corrigées par la suite.
description: Relation: https://lamop.hypotheses.org/
Electric and magnetic fields tuned spin-polarized topological phases in two-dimensional ferromagnetic MnBi$_4$Te$_7$
Creators: name: Xiao, Shi
name: Xiao, Xiaoliang
name: Zhan, Fangyang
name: Fan, Jing
name: Wu, Xiaozhi
name: Wang, Rui
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Applying electric or magnetic fields is widely used to not only create and manipulate topological states but also facilitate their observations in experiments. In this work, we show by first-principles calculations and topological analysis that the time-reversal (TR) symmetry-broken quantum spin Hall (QSH) state emerges in a two-dimensional ferromagnetic MnBi$_4$Te$_7$ monolayer. This TR-symmetry broken QSH phase possesses a highly tunable nontrivial band gap under an external electric field (or tuning interlayer distance). Furthermore, based on the Wannier-function-based tight-binding approach, we reveal that a topological phase transition from the TR-symmetry broken QSH phase to the quantum anomalous Hall (QAH) phase occurs with the increase of magnetic fields. Besides, we also find that a reverse electric fields can facilitate the realization of QAH phase. Our work not only uncovers the ferromagnetic topological properties the MnBi$_4$Te$_7$ monolayer tuned by electric and magnetic fields, but also can stimulate further applications to spintronics and topological devices.
description: 7 pages, 4 figures
A borboleta monarca (Danaus plexippus) em Odemira - Portugal
Creators: name: Viana, Cláudia
name: Campos, Rúben
name: Viegas, Fábio
name: Silva, Francisco
name: Graça, Ricardo
name: Reis, Vanessa
name: Guerreiro, Madalena
name: Canha, Paula
Publisher: name: Revista Captar: Ciência e Ambiente para Todos
Year: 2009

description: A borboleta monarca (Danaus plexippus), nativa do Continente Americano, é famosa pelas suas migrações extraordinárias em extensão e número de indivíduos. Até há pouco tempo foi considerada migrante de passagem no nosso país até se descobrir uma colónia residente em Portugal em Vila Nova de Milfontes. Durante um ano monitorizou-se uma população de borboletas monarca e aplicaram-se diferentes métodos de amostragem de populações biológicas: marcação e recaptura, transectos lineares e método dos quadrados. Com base na avaliação efectuada, foi possível constatar que em Portugal estas borboletas não migram e reproduzem-se em diferentes alturas do ano com um pico de intensidade no Outono e na Primavera, ao contrário do que acontece na espécie de origem. O número de machos e fêmeas difere ao longo do ano. No Verão, curiosamente, apenas se conseguem detectar machos apesar de continuarem a nascer borboletas. Uma justificação para esta ocorrência terá que ser obtida em trabalhos futuros. Em paralelo investigou-se a possibilidade de D. plexippus ter um comportamento invasor,tendo-se verificado que não existem fenómenos de competição pelo alimento entre as lagartas de Danaus plexippus e lagartas de borboletas nativas, ou outros insectos. No entanto é provável que exista competição pelo alimento entre os adultos de Danaus plexippus e os adultos de borboletas nativas já que coexistiam no mesmo local, alimentando-se das mesmas espécies de plantas. Uma das espécies que pode competir pelo alimento com Danaus plexippus é Callimorpha quadripunctaria, uma espécieprioritária da directiva habitats (anexo B-II do Decreto – Lei nº 49/05, de 24 de Fevereiro) que foi observada na área de estudo. Num futuro próximo serão dados passos na tentativa de conhecer melhor a biologia e a fisiologia desta espécie e o seu habitat para desvendar as particularidades deste ecossistema em equilíbrio.
description: Revista Captar: Ciência e Ambiente para Todos, vol. 1 n.º 1 (2009)
Piloting a full-year, optics-based high school course on quantum computing
Creators: name: Walsh, Joel A.
name: Fenech, Mic
name: Tucker, Derrick L.
name: Riegle-Crumb, Catherine
name: La Cour, Brian R.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Physics Education (physics.ed-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Quantum computing was once regarded as a mere theoretical possibility, but recent advances in engineering and materials science have brought practical quantum computers closer to reality. Currently, representatives from industry, academia, and governments across the world are working to build the educational structures needed to produce the quantum workforce of the future. Less attention has been paid to growing quantum computing capacity at the high school level. This article details work at The University of Texas at Austin to develop and pilot the first full-year high school quantum computing class. Over the course of two years, researchers and practitioners involved with the project learned several pedagogical and practical lessons that can be helpful for quantum computing course design and implementation at the secondary level. In particular, we find that the use of classical optics provides a clear and accessible avenue for representing quantum states and gate operators and facilitates both learning and the transfer of knowledge to other Science, Technology, and Engineering (STEM) skills. Furthermore, students found that exploring quantum optical phenomena prior to the introduction of mathematical models helped in the understanding and mastery of the material.
description: 5 pages, no figures
Extremal total distance of graphs of given radius I
Creators: name: Cambie, Stijn
Publisher: name: arXiv
Year: 2022
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 05C09, 05C12, 05C20, 05C35

description: In 1984, Plesník determined the minimum total distance for given order and diameter and characterized the extremal graphs and digraphs. We prove the analog for given order and radius, when the order is sufficiently large compared to the radius. This confirms asymptotically a conjecture of Chen et al. We also state an analog of the conjecture of Chen et al for digraphs and prove it for sufficiently large order.
description: 18 pages, 5 figures, this paper is an extended version of a first part of arXiv:1903.01358, mainly clarifying the content of sections 3 and 4 Figure 2 has been corrected, an Open access statement and a missing part of the introduction have been added
Geologia e Ambiente: a educação ambiental nas minas de ouro de Castromil
Creators: name: Barros, José
name: Vasconcelos, Clara
name: Lima, Alexandre
name: Santos, Maria João
Publisher: name: Revista Captar: Ciência e Ambiente para Todos
Year: 2009

description: Sendo reconhecido o papel das aulas práticas, nomeadamente de campo, no ensino das ciências, elas surgem frequentemente nas planificações das práticas lectivas sem fundamentação didáctica ou sem integração curricular. Reconhecendo a importância do papel insubstituível que as actividades práticas no campo desempenham nos processos de ensino e de aprendizagem da Geologia, e também na promoção da Educação Ambiental, elaborou-se uma planificação e desenvolveu-se uma saída de campo às minas de ouro de Castromil (Paredes, Porto). A actividade contribuiu para a divulgação e valorização de aspectos geológico/mineiros de interesse relevante e para a protecção ambiental do local. O impacte da actividade revelou-se bastante positivo junto dos alunos do 3º Ciclo do Ensino Básico, que constituíram a amostra do estudo (n=39). A planificação da actividade de campo seguiu o modelo organizacional de Nir Orion (1993), tendo os materiais didácticos sido elaborados para consubstanciar cada uma das três fases do modelo (preparação, viagem e pós-viagem).
description: Revista Captar: Ciência e Ambiente para Todos, vol. 1 n.º 1 (2009)
La società e la città industriale nei Mystères de Paris di Eugène Sue [1999]
Creators: name: Perego, Andrea
Publisher: name: figshare
Year: 2016
Subjects: subject: Literature
subject: Philosophy
subject: FOS: Philosophy, ethics and religion
subject: Sociology
subject: FOS: Sociology

description: In Italian.
Master thesis in Aesthetics on the representation of the industrial city in the social novels of the first half of the 19th century.
This phaenomenon is studied by analysing not only the relevant artistic and literary production of the period, especially from France and the UK, but also how the dramatic social and urban changes caused by the industrial revolution were reflected in the scientific and philosophical literature.
The result was the identification of a number of conflicting "cognitive patterns" used to provide an interpretation to the modern city and society, which have later affected the cultural evolution in industrialised countries as well as the reshaping of the urban space.
This thesis was discussed on 30 November 1999.
BDG-Net: Boundary Distribution Guided Network for Accurate Polyp Segmentation
Creators: name: Qiu, Zihuan
name: Wang, Zhichuan
name: Zhang, Miaomiao
name: Xu, Ziyong
name: Fan, Jie
name: Xu, Linfeng
Publisher: name: arXiv
Year: 2022
Subjects: subject: Image and Video Processing (eess.IV)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: Colorectal cancer (CRC) is one of the most common fatal cancer in the world. Polypectomy can effectively interrupt the progression of adenoma to adenocarcinoma, thus reducing the risk of CRC development. Colonoscopy is the primary method to find colonic polyps. However, due to the different sizes of polyps and the unclear boundary between polyps and their surrounding mucosa, it is challenging to segment polyps accurately. To address this problem, we design a Boundary Distribution Guided Network (BDG-Net) for accurate polyp segmentation. Specifically, under the supervision of the ideal Boundary Distribution Map (BDM), we use Boundary Distribution Generate Module (BDGM) to aggregate high-level features and generate BDM. Then, BDM is sent to the Boundary Distribution Guided Decoder (BDGD) as complementary spatial information to guide the polyp segmentation. Moreover, a multi-scale feature interaction strategy is adopted in BDGD to improve the segmentation accuracy of polyps with different sizes. Extensive quantitative and qualitative evaluations demonstrate the effectiveness of our model, which outperforms state-of-the-art models remarkably on five public polyp datasets while maintaining low computational complexity. Code: https://github.com/zihuanqiu/BDG-Net
description: Accepted by SPIE Medical Imaging 2022
title: Sales data as a measure of antibiotics usage
title: Concepts, examples and discussion of influencing factors
titleType: Subtitle
Creators: name: Merle, Roswitha
name: Meyer‐Kühling, Borris
Publisher: name: Freie Universität Berlin
Year: 2019
Subjects: subject: antimicrobial consumption
subject: cephalosporins
subject: farm animals
subject: PCU
subject: quinolones
subject: technical units
subject: 600 Technik, Medizin, angewandte Wissenschaften::630 Landwirtschaft::632 Schäden, Krankheiten, Schädlinge an Pflanzen

description: Monitoring and surveillance of antimicrobial usage in animals is a public health concern and different methods are currently discussed widely in public, science and politics. The objective of the paper is to present the available methods of monitoring and to discuss possible differences in the assessment of the antibiotics treatment. Sales data are expressed as the average amount of substance per animal or kg live weight (e.g. population‐corrected unit, PCU). The number of Defined Daily Doses (nDDDvet) is calculated by extrapolating sales data with average animal weights and defined drug doses to a number of treatments theoretically applied to animals. In contrast, the number of Used Daily Doses (nUDDvet) displays the actual number of treatments which have been applied. As sales data are relatively easily obtained, they are frequently used. However, their results are influenced by the composition of the population and by the dose of the substances. As both may vary strongly between countries, direct comparison of sales data between countries may be misleading. The concept of analysing sales data is shown by exemplarily using the methods in the ESVAC report 2015. The presentation of usage data in terms of nDDDvet or of nUDDvet increases the comparability of the data from different countries or time periods. Furthermore, fluoroquinolones and third‐/fourth‐generation cephalosporins which, among other substances, bare a potential risk for human health, are used at low doses. Hence, their use contributes to a sales reduction while contrasting the guidelines of prudent use. nDDDvet or nUDDvet have the ability to better reflect the treatment frequency and thus to better link antibiotics use to public health concerns. Quantification of antibiotics should assist to focus on prudent use of antimicrobials to reduce the burden of resistant bacteria and, thus, enhance public health, animal health and animal welfare.
Use of autoclaved aerated concrete particles for simultaneous removal of nitrogen and phosphorus as filter media from domestic wastewater
Creators: name: Bao, Teng
name: Yu, Zhi Ming
name: Damtie, Mekdimu Mezemir
name: Wu, Ke
name: Jin, Jie
name: Zhang, Yong
name: Wei, Xing Lai
name: Frost, Ray L
Publisher: name: Taylor & Francis
Year: 2019
Subjects: subject: Biochemistry
subject: Space Science
subject: Microbiology
subject: FOS: Biological sciences
subject: Cell Biology
subject: Environmental Sciences not elsewhere classified
subject: Chemical Sciences not elsewhere classified
subject: Ecology
subject: Biological Sciences not elsewhere classified
subject: Plant Biology

description: In this study, autoclaved aerated concrete particles (AACPs) from construction waste were used to simultaneously remove phosphorus and nitrogen in biological aerated filters (BAFs). The effects of air/water (A/W) ratio on the removal performance of phosphorus (PO43−), total organic carbon, total nitrogen (TN), and ammonia nitrogen were investigated. Results showed that AACP BAF was more efficient than commercially available ceramsite (CAC) BAF. For example, the removal rates of TN with AACP and CAC were 45.96% and 15.64%, respectively, and those of PO43− with AACP and CAC were 72.45% and 33.97%, respectively, at the A/W ratio of 3:1. Different characterization methods were utilized to evaluate the surface shape, elemental compostion, and internal and surface structure of AACP. The interconnectivity and uniformity of pores and the rough surface of AACP were found to be suitable for the growth of microbial biofilm. In addition, the growth of internal pores in AACP promoted the removal of phosphorus and nitrogen. The surface of used AACP contained a small amount of irregular crystals and was covered with a layer of aggregates, which were characterized as hydroxyapatite [HAP, Ca5(OH)(PO4)3]. The formation of HAP as a final byproduct confirmed the successful removal of phosphorus. Therefore, construction wastes, such as AACPs, could be recycled and utilized as a promising biofilter media for excellent wastewater treatment.
Merger rate of charged black holes from the two-body dynamical capture
Creators: name: Liu, Lang
name: Kim, Sang Pyo
Publisher: name: arXiv
Year: 2022
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We consider the two-body dynamical capture of black holes carrying U(1) charge which can not only correspond to electric or magnetic charge but also have other physical interpretations such as dark or hidden charge. In the low-velocity and weak-field regime, we study gravitational and electromagnetic radiations from point masses with U(1) charges in a hyperbolic orbit, and we develop a formalism to derive the merger rate of charged black holes from the two-body dynamical capture. We apply the formalism to find the effects of the charge-to-mass ratio on the merger rate for possible different cases and discover that the effects depend on the models.
description: 17 pages, 2 figures
Exposição a agentes perturbadores naturais e antropogénicos: consequências na diversidade genética de populações de dafnídeos
Creators: name: Lopes, Isabel
name: Martins, Nelson
name: Baird, Donald J.
name: Ribeiro, Rui
Publisher: name: Revista Captar: Ciência e Ambiente para Todos
Year: 2009

description: A perda de diversidade genética devido a contaminação antropogénica pode aumentar o risco de extinção das populações expostas aquando sujeitas a ulteriores agentes de perturbação. O presente estudo pretendeu investigar o efeito de dois agentes perturbadores na diversidade genética de uma população laboratorial do cladócero planctónico dulçaquícola Daphnia longispina: predação (dois níveis de intensidade) e contaminação por metais. Para tal, foram seleccionados cinco clones (sensu linhagens obtidas por partenogénese) de D. longispina, com diferentes sensibilidades a concentrações letais de um efluente rico em metais. Estes clones foram expostos conjuntamente à presença isolada de cada um dos dois agentes perturbadores e à presença simultânea de ambos (predação + metais). A densidade populacional foi monitorizada ao longo de toda a experiência, e, no final, foi determinada a frequência de cada clone nos diferentes tratamentos através da análise de perfis aloenzimáticos. Verificou-se que os clones mais sensíveis desapareceram das populações após serem expostas a contaminação por metais, quer na presença de predação, quer, sobretudo, na sua ausência. Esta experiência constitui mais uma evidência de ocorrência de erosão genética em populações expostas a contaminação química. Os resultados obtidos corroboram, ainda, a “hipótese do distúrbio intermédio”: níveis intermédios de agentes perturbadores promovem a manutenção da variabilidade genética de uma população.
description: Revista Captar: Ciência e Ambiente para Todos, vol. 1 n.º 1 (2009)
title: EL METLINE
title: EL METLINE
title: Atlas archéologique de la Tunisie
Creators: name: Babelon, Ernest Charles François
name: Babelon, Ernest Charles François > Auteur
name: Cagnat, René Louis Victor > Auteur
name: Reinach, Salomon > Auteur
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2022
Subjects: subject: Archéologie
subject: Antiquité
subject: Recherche archéologique
subject: Savoirs (Les)
subject: Cartographie
subject: Atlas
subject: Atlas archéologique

description: [Atlas archéologique de la Tunisie ; Edition spéciale des cartes topographiques publiées par la ministère de la Guerre, accompagnée d’un texte explicatif rédigé par E. Babelon, R. Cagnat et S. Reinach, membres de la Commission de l’Afrique du Nord (1ère série, 60 feuilles au 1/50 000 et notices)]
description: Atlas
description: Atlas-Archeo-Tunisie_004
description: 1/50 000
description: La Méditerranée à la carte
description: Paris
description: Source: Institut de recherche sur le Maghreb contemporain (IRMC); Cité numérique de la Méditerranée (MMSH)
description: Source: La Méditerranée à la carte
description: Source: La Méditerranée à la carte > Atlas archéologique de la Tunisie
description: Relation: https://cinumed.mmsh.univ-aix.fr/idurl/1/96167
description: Coverage: Tunisie
description: Coverage: El-Metline
description: Coverage: Antiquité
description: Temporal: Antiquité
description: Provenance: Institut de recherche sur le Maghreb contemporain (IRMC); Cité numérique de la Méditerranée (MMSH)
Facet dependent surface energy gap on magnetic topological insulators
Creators: name: Tan, Hengxin
name: Yan, Binghai
Publisher: name: arXiv
Year: 2022
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Magnetic topological insulators (MnBi$_2$Te$_4$)(Bi$_2$Te$_3$)$_n$ ($n=0,1,2,3$) are promising to realize exotic topological states such as the quantum anomalous Hall effect (QAHE) and axion insulator (AI), where the Bi$_2$Te$_3$ layer introduces versatility to engineer electronic and magnetic properties. However, whether surface states on the Bi$_2$Te$_3$ terminated facet are gapless or gapped is debated, and its consequences in thin-film properties are rarely discussed. In this work, we find that the Bi$_2$Te$_3$ terminated facets are gapless for $n \ge 1$ compounds by calculations. Despite that the surface Bi$_2$Te$_3$ (one layer or more) and underlying MnBi$_2$Te$_4$ layers hybridize and give rise to a gap, such a hybridization gap overlaps with bulk valence bands, leading to a gapless surface after all. Such a metallic surface poses a fundamental challenge to realize QAHE or AI, which requires an insulating gap in thin films with at least one Bi$_2$Te$_3$ surface. In theory, the insulating phase can still be realized in a film if both surfaces are MnBi$_2$Te$_4$ layers. Otherwise, it requires that the film thickness is less than 10$\sim$20 nm to push down bulk valence bands via the size effect. Our work paves the way to understand surface states and design bulk-insulating quantum devices in magnetic topological materials.
description: 10 pages for the main text (4 figures) and 8 pages for supplemental material
Use of autoclaved aerated concrete particles for simultaneous removal of nitrogen and phosphorus as filter media from domestic wastewate
Creators: name: Bao, Teng
name: Yu, Zhi Ming
name: Damtie, Mekdimu Mezemir
name: Wu, Ke
name: Jin, Jie
name: Zhang, Yong
name: Wei, Xing Lai
name: Frost, Ray L
Publisher: name: Taylor & Francis
Year: 2019
Subjects: subject: Biochemistry
subject: Space Science
subject: Microbiology
subject: FOS: Biological sciences
subject: Cell Biology
subject: Environmental Sciences not elsewhere classified
subject: Chemical Sciences not elsewhere classified
subject: Ecology
subject: Biological Sciences not elsewhere classified
subject: Plant Biology

description: In this study, autoclaved aerated concrete particles (AACPs) from construction waste were used to simultaneously remove phosphorus and nitrogen in biological aerated filters (BAFs). The effects of air/water (A/W) ratio on the removal performance of phosphorus (PO43−), total organic carbon, total nitrogen (TN), and ammonia nitrogen were investigated. Results showed that AACP BAF was more efficient than commercially available ceramsite (CAC) BAF. For example, the removal rates of TN with AACP and CAC were 45.96% and 15.64%, respectively, and those of PO43− with AACP and CAC were 72.45% and 33.97%, respectively, at the A/W ratio of 3:1. Different characterization methods were utilized to evaluate the surface shape, elemental compostion, and internal and surface structure of AACP. The interconnectivity and uniformity of pores and the rough surface of AACP were found to be suitable for the growth of microbial biofilm. In addition, the growth of internal pores in AACP promoted the removal of phosphorus and nitrogen. The surface of used AACP contained a small amount of irregular crystals and was covered with a layer of aggregates, which were characterized as hydroxyapatite [HAP, Ca5(OH)(PO4)3]. The formation of HAP as a final byproduct confirmed the successful removal of phosphorus. Therefore, construction wastes, such as AACPs, could be recycled and utilized as a promising biofilter media for excellent wastewater treatment.
A expressão genética como ferramenta de avaliação de impactos da poluição por pesticidas em sistemas aquáticos
Creators: name: Pereira, Joana Luísa
name: Gonçalves, Fernando
Publisher: name: Revista Captar: Ciência e Ambiente para Todos
Year: 2009

description: O uso de pesticidas é objecto de controvérsia: são geralmente necessários para o sucesso da produção agrícola, mas a contaminação do solo e de sistemas aquáticos (e.g. lagos e rios) é prejudicial para muitas espécies. A utilização de insecticidas é particularmente preocupante porque grande parte da biomassa aquática é composta por artrópodes semelhantes aos organismos-alvo (pragas). A utilização das biomoléculas de ADN e dos seus mecanismos operativos (e.g. formação de ARN mensageiro durante a síntese proteica) é uma das mais recentes biotecnologias aplicadas à análise dos efeitos nefastos de compostos tóxicos. De uma forma simplificada, sabendo que, em condições controlo, um organismo aquático produz X moléculas de ARNm, ao observar que, após exposição a um insecticida, produz 2X ou -2X, pode concluir-se que o organismo foi afectado pela exposição. Posteriormente analisando a função dos genes envolvidos neste processo, pode concluir-se acerca dos mecanismos biológicos que foram inibidos ou estimulados, podendo estimar-se riscos do insecticida para o ecossistema. O objectivo deste estudo foi verificar as alterações na expressão genética de um zooplanctonte (Daphnia magna) após exposição a Metomil, um insecticida muito usado em Portugal. Para tal, utilizou-se um chip de ADN (microarray), que permite o estudo da expressão de milhares de genes numa só leitura.
description: Revista Captar: Ciência e Ambiente para Todos, vol. 1 n.º 1 (2009)
Comunicação química em sistemas predador-presa alterados: um contributo para a controvérsia
Creators: name: Castro, Bruno Branco
name: Consciência, Susana
name: Gonçalves, Fernando
Publisher: name: Revista Captar: Ciência e Ambiente para Todos
Year: 2009

description: O efeito de infoquímicos produzidos por duas espécies de peixes (gambúzia e perca-sol) foi avaliado em ensaios de reprodução com uma das suas presas preferenciais (omicrocrustáceo Daphnia, ou pulga-de-água). Em comparação com um controlo sem infoquímicos, Daphnia longispina respondeu de forma similar aos sinais de ambos os predadores, produzindo ninhadas mais numerosas e mais cedo, bem como reduzindo o tamanho corporal das primíparas e dos neonatos. Este decréscimo de tamanho corporal foi proporcional ao aumento na densidade de peixe (medida indirecta da concentração dos infoquímicos). A redução do tamanho corporal (quer nas primíparas, quer nosneonatos) constitui uma resposta adaptativa à predação selectiva exercida pelos peixes (preferem os exemplares de maiores dimensões). Por outro lado, o incremento dafecundidade representa um mecanismo compensatório para fazer face à mortalidade causada por predadores. Dado que ambas as espécies de peixe foram introduzidas apenas durante o século XX na fauna Europeia, era expectável que Daphnia não respondesse aos sinais químicos destes predadores, ao contrário do que sucedeu. Isto suporta a teoria de um infoquímico inespecífico, independente da espécie de predador. Mais, todas as evidências apontam para que a natureza do infoquímico esteja relacionada com a ingestão prévia da presa.
description: Revista Captar: Ciência e Ambiente para Todos, vol. 1 n.º 1 (2009)