cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Extended Near Horizon Symmetries of Extremal BTZ Black Holes in 3D Massive Gravity
Creators: name: Ballav, Debojyoti
name: Kulkarni, Shailesh
Publisher: name: arXiv
Year: 2024
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study the asymptotic symmetries of near-horizon extremal BTZ black holes in higher derivative theories of gravity, such as New Massive Gravity and Topological Massive Gravity. By employing a particular boundary condition and the regularization prescription proposed earlier for the Einstein gravity, we demonstrate the existence of two centrally extended Virasoro algebras. The central charges evaluated within this framework are in agreement with their corresponding expressions evaluated at the spatial infinity. We also discuss the robustness of the regularization procedure by relating asymptotic and near-horizon geometries.
description: 21 pages, Version 3: Published Version
Alas, the dark matter structures were not that trivial
Creators: name: Schmidt, Kasper B.
name: Hansen, Steen H.
name: Maccio', Andrea V.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The radial density profile of dark matter structures has been observed to have an almost universal behaviour in numerical simulations, however, the physical reason for this behaviour remains unclear. It has previously been shown that if the pseudo phase-space density, rho/sigma_d^epsilon, is a beautifully simple power-law in radius, with the "golden values" epsilon=3 and d=r (i.e., the phase-space density is only dependent on the radial component of the velocity dispersion), then one can analytically derive the radial variation of the mass profile, dispersion profile etc. That would imply, if correct, that we just have to explain why rho/sigma^3_r ~r^{-alpha}, and then we would understand everything about equilibrated DM structures. Here we use a set of simulated galaxies and clusters of galaxies to demonstrate that there are no such golden values, but that each structure instead has its own set of values. Considering the same structure at different redshifts shows no evolution of the phase-space parameters towards fixed points. There is also no clear connection between the halo virialized mass and these parameters. This implies that we still do not understand the origin of the profiles of dark matter structures.
description: 4 pages, 3 figures, accepted for publication in ApJL
A Constraint on Planck-scale Modifications to Electrodynamics with CMB polarization data
Creators: name: Gubitosi, Giulia
name: Pagano, Luca
name: Amelino-Camelia, Giovanni
name: Melchiorri, Alessandro
name: Cooray, Asantha
Publisher: name: arXiv
Year: 2009
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We show that the Cosmic Microwave Background (CMB) polarization data gathered by the BOOMERanG 2003 flight and WMAP provide an opportunity to investigate {\it in-vacuo} birefringence, of a type expected in some quantum pictures of space-time, with a sensitivity that extends even beyond the desired Planck-scale energy. In order to render this constraint more transparent we rely on a well studied phenomenological model of quantum-gravity-induced birefringence, in which one easily establishes that effects introduced at the Planck scale would amount to values of a dimensionless parameter, denoted by $ξ$, with respect to the Planck energy which are roughly of order 1. By combining BOOMERanG and WMAP data we estimate $ξ\simeq -0.110 \pm 0.076$ at the 68% c.l. Moreover, we forecast on the sensitivity to $ξ$ achievable by future CMB polarization experiments (PLANCK, Spider, EPIC), which, in the absence of systematics, will be at the 1-$σ$ confidence of $8.5 \times 10^{-4}$ (PLANCK), $6.1 \times 10^{-3}$ (Spider), and $1.0 \times 10^{-5}$ (EPIC) respectively. The cosmic variance-limited sensitivity from CMB is $6.1\times 10^{-6}$.
description: 16 pages
Experimental DML over digital repositories in Japan
Creators: name: Namiki, Takao
name: Kuroda, Hiraku
name: Naruse, Shunsuke
Publisher: name: arXiv
Year: 2009
Subjects: subject: Digital Libraries (cs.DL)
subject: FOS: Computer and information sciences

description: In this paper the authors show an overview of Virtual Digital Mathematics Library in Japan (DML-JP), contents of which consist of metadata harvested from institutional repositories in Japan and digital repositories in the world. DML-JP is, in a sense, a subject specific repository which collaborate with various digital repositories. Beyond portal website, DML-JP provides subject-specific metadata through OAI-ORE. By the schema it is enabled that digital repositories can load the rich metadata which were added by mathematicians.
Thirring Model with Jump Defect
Creators: name: Aguirre, A. R.
name: Gomes, J. F.
name: Ymai, L. H.
name: Zimerman, A. H.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences

description: The purpose of our work is to extend the formulation of classical affine Toda Models in the presence of jump defects to pure fermionic Thirring model. As a first attempt we construct the Lagrangian of the Grassmanian Thirring model with jump defect (of Backlund type) and present its conserved modified momentum and energy expressions giving a first indication of its integrability.
description: Poster contribution to the 5th International School on Field Theory and Gravitation, Cuiaba, MT, Brazil, 20-24 Apr 2009. to be published in PoS ISFTG(2009)
Experimental analysis of a DC current-controlled variable inductor in a DC-DC converter
Creators: name: Mendes, André P.
name: Baptista, Bruno
name: Perdigão, Marina S.
name: Mendes, André M. S.
Publisher: name: Neutro à Terra
Year: 2021

description: This paper presents an analysis for the experimental set up of a double toroid variable inductor (VI) that is fed by a DC-DC converter. The main objective is to analyze the behaviour of the VI for different power levels, in particular the influence of the control circuit to regulate the inductance of the main winding. By observing the waveform of the main current winding, it is possible to demonstrate the ability to increase or decrease the inductance value. A variable inductor is typically used from linear to saturated state and presents an inversely proportional inductance as a function of the main winding current. By employing this current-controlled double toroid VI it is possible to have both an inductance increase and inductance decrease as a function of the control current by regulating the reluctance of the magnetic cores.
description: Neutro à Terra, N.º 23 (2019): Revista Técnico-Científica (Primeiro Semestre)
Direct minimization on the complex Stiefel manifold in Kohn-Sham density functional theory for finite and extended systems
Creators: name: Luo, Kai
name: Wang, Tingguang
name: Ren, Xinguo
Publisher: name: arXiv
Year: 2024
Subjects: subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: Direct minimization method on the complex Stiefel manifold in Kohn-Sham density functional theory is formulated to treat both finite and extended systems in a unified manner. This formulation is well-suited for scenarios where straightforward iterative diagonalization becomes challenging, especially when the Aufbau principle is not applicable. We present the theoretical foundation and numerical implementation of the Riemannian conjugate gradient (RCG) within a localized non-orthogonal basis set. Riemannian Broyden-Fletcher-Goldfarb-Shanno (RBFGS) method is tentatively implemented. Extensive testing compares the performance of the proposed methods and highlights that the quasi-Newton method is more efficient. However, for extended systems, the computational time required grows rapidly with respect to the number of $\mathbf{k}$-points.
description: 20 pages, 5 figures
MOESM9 of Comprehensive analysis of miRNA profiles reveals the role of Schistosoma japonicum miRNAs at different developmental stages
Creators: name: Yu, Jie
name: Yu, Ying
name: Li, Qing
name: Chen, Muxin
name: Shen, Haimo
name: Zhang, RuiXiang
name: Song, Mingxin
name: Hu, Wei
Publisher: name: figshare
Year: 2019
Subjects: subject: Biochemistry
subject: Space Science
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Chemical Sciences not elsewhere classified
subject: Biological Sciences not elsewhere classified
subject: Marine Biology
subject: Science Policy

description: Additional file 9. Validation miRNA target’s validity using dual luciferase report system. 6 targets (combine sites in the targets 3’ UTR) of 3 miRNAs (sja-miR-125a, sja-miR-125b and sja-miR3487, high expression during 18–22 dpi) were selected to validate the targets validity using pmirGLO luciferase report system. Results showed 4/6 (66.7%) predicted targets were successfully validated. Mimics represented miRNA mimics; NC represented NC mimics; blank represented no chemically synthetic oligonucleotides. Target vector represented including miRNA binding site fragment recombinant plasmid; WT vector represented wild type vector (pmirGLO vector). NC mimics and WT vector were set as negative control. Data were presented as the mean ± SD of triplicate independent experiments. “*”: p < 0.05; “**”: p < 0.001 (Student’s t-test), NS: not significant.
Análise da evolução da eficiência energética e qualidade de energia das lâmpadas LED no âmbito do Programa Brasileiro de etiquetagem
Creators: name: Fortes, Marcio Zamboti
name: Fragoso, Adriano Pinheiros
Publisher: name: Zenodo
Year: 2020

description: This is a presentation done in “III Workshop de Iluminação a LED” organized by Centro de Pesquisas de Energia Elétrica – Cepel, Rio de Janeiro, Brazil, october 29-30th 2019
Evolução das classes de rendimento de motores elétricos
Creators: name: Melo, Pedro Miguel Azevedo De Sousa
Publisher: name: Neutro à Terra
Year: 2021

description: Os acionamentos eletromecânicos são os maiores consumidores mundiais de energia elétrica, pelo que a melhoria dos seus rendimentos tem um elevado impacto na poupança de energia. Os motores de indução trifásicos são a opção dominante, razão pela qual a procura de máquinas com melhores rendimentos tem estado centrada nestes motores. No entanto, a ausência de um sistema universal de classificação dos rendimentos e, principalmente, a diversidade de métodos usados na sua estimação (com resultados distintos), constituiu um sério obstáculo à comercialização mundial destas máquinas. A classificação IE (CEI) foi decisiva na superação dessas dificuldades. Este artigo pretende fazer uma síntese da evolução das classes de rendimento de motores elétricos de alcance internacional. Começa-se pelo acordo CE/CEMEP, no contexto europeu, referindo depois as sucessivas normas internacionais CEI, as quais traduzem a evolução da classificação IE.
description: Neutro à Terra, N.º 23 (2019): Revista Técnico-Científica (Primeiro Semestre)
The prototype of Ancient analemmatic sundials (Rostov Oblast, Russia)
Creators: name: Vodolazhskaya, L.N.
name: Larenok, P.A.
name: Nevsky M.Yu.
Publisher: name: Archaeoastronomy and Ancient Technologies
Year: 2016
Subjects: ANALEMMATIC SUNDIAL
SRUBNA BURIAL
SLAB
WELLS
GNOMON
MODEL SAMPLE
ARCHAEOASTRONOMY

description: The article presents the results of a study of petroglyphs on a unique stone slab discovered near the kurgan 1 of the kurgan field Varvarinsky I (Rostov Oblast, Russia). During the study was done comparing it with plates of Srubna burials on which were depicted the petroglyphs. Similar features for all the considered slabs are elliptically arranged wells. Groove made to Varvarinsky stone slab, has the same parameters as the ellipse from the wells on the slab of the kurgan field Tavriya -1, discovered in the Rostov region, too. With the help of astronomical methods previously been proved that elliptically located wells on the Srubna slabs are hour markers of analemmatic sundial. By results of the use of similar methods to study complex of petroglyphs on Varvarinsky slab, it was concluded that the slab could be used for development of the technology of markup of sundial on different geographical latitudes. Also, Varvarinsky slab could serve as a model example for a markup of the ellipse on which subsequently extorted wells for latitudes, close to the latitude of the place of slab detection. Thus, Varvarinsky stone slab is the prototype of analemmatic sundials, discovered in the Rostov and Donetsk oblasts.
Solar power support of luxury boat
Creators: name: Wawrzyniak, Aleksandra
Publisher: name: Neutro à Terra
Year: 2021

description: This document contains project of solar power sup-port for luxury boat. This project is design of electrical installation of the boat with solar panel system as an additional energy source what in case of an emergency it is possible to supply loads necessary for communication and safety. Electric propulsion system allows better maneuvering at low speed. This work presents design of electrical installation of the base and of the solar part of the system with all the necessary elements. Simulation of solar design and power analysis of solar part of the system are presented, what provides with good picture of its influence on the system. Obtained results are promising and can potentially be extended to bigger systems. This kind of solution highly increases reliability of the system.
description: Neutro à Terra, N.º 23 (2019): Revista Técnico-Científica (Primeiro Semestre)
Image of inverted World tree on the stone slab and vessels of the Bronze Age
Creators: name: Vodolazhskaya, L.N.
name: Larenok, P.A.
name: Nevsky M.Yu.
Publisher: name: Archaeoastronomy and Ancient Technologies
Year: 2016
Subjects: STONE SLAB WITH PETROGLYPHS
INVERTED WORLD TREE
SUNDIAL
VESSELS WITH SIGNS
SRUBNA CULTURE
VARUNA-MITRA
ARCHAEOASTRONOMY

description: The article presents the results of the study of petroglyphs on a unique stone slab discovered near the kurgan 1 of the kurgan field Varvarinsky I (Rostov Oblast, Russia). Analysis of features of the location and style of petroglyph "tree" showed that the branches could determine semi-minor semiaxes m of the "dial" ellipses of analemmatic sundials with semi-major axis M = 24.2 cm for medium and high (northern) latitudes up to the North Pole and "tree" marks the direction to the North. The desire to construct a tool with which it was possible to build a "dial" for analemmatic sundial for different latitude up to the latitude of the North Pole could appear under the influence of the dominant mythological ideas about sacred geography of the surrounding world in which the North is the World Mountain, World Tree or the abode of the gods. In the article the authors conclude that the petroglyph "tree" on Varvarinsky slab marks the direction to the North as a projection of the North Pole of the world on the earth's surface, which simulates the slab. Petroglyph is an image of an inverted World Tree, when viewed from the gnomon / man. The trunk of the Tree corresponds to the astronomical world axis, and its branches symbolize the visible daily path of the Sun and, perhaps, the night paths of stars across the sky at different latitudes. During the research was carried out a comparative analysis of the petroglyph "tree" with images of the inverted tree on the Srubna vessels. According to the analysis it was concluded that a mythical World Tree of Srubna population is likely to be a tree of pine family. Sign of the inverted tree on the Srubna vessels has been interpreted by as a symbol of the direction of the North and / or the north pole of the world; and accompanying signs were interpreted as symbols of circumpolar stars and constellations (asterisms).
The cone of Betti diagrams of bigraded artinian modules of codimension two
Creators: name: Boij, Mats
name: Floystad, Gunnar
Publisher: name: arXiv
Year: 2010
Subjects: subject: Commutative Algebra (math.AC)
subject: FOS: Mathematics
subject: 13D02, 13C14

description: We describe the positive cone generated by bigraded Betti diagrams of artinian modules of codimension two, whose resolutions become pure of a given type when taking total degrees. If the differences of these total degrees, p and q, are relatively prime, the extremal rays are parametrised by order ideals in N^2 contained in the region px + qy < (p-1)(q-1). We also consider some examples concerning artinian modules of codimension three.
description: 15 pages
ATLAS searches for higgsinos with R-parity violating couplings in events with leptons
Creators: name: Ducu, Otilia
Publisher: name: arXiv
Year: 2024
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: This document presents two searches for Supersymmetry through the direct production of pairs of higgsinos decaying into final states with leptons and ($b$-) jets. The analyses are performed using 139~fb$^{-1}$ of the 13~TeV proton-proton collision data collected with the ATLAS detector. The methods used to estimate the Standard Model and detector backgrounds are discussed, as well as their shortcomings. Finally, results in selected signal regions, and some exclusion limits, are presented, illustrating the significant improvement over the previous exclusion limits.
 Document based on a presentation at the XI International Conference on New Frontiers in Physics (ICNFP 2022).
description: 19 pages, 11 figures, ICNFP 2022
The stellar population of the star forming region G61.48+0.09
Creators: name: Marin-Franch, A.
name: Herrero, A.
name: Lenorzer, A.
name: Najarro, F.
name: Ramirez, S.
name: Font-Ribera, A.
name: Figer, D.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: - Context: We present the results of a near-infrared photometric and spectroscopic study of the star forming region G61.48+0.09. - Aims: The purpose of this study is to characterize the stellar content of the cluster and to determine its distance, extinction, age and mass. - Methods: The stellar population was studied by using color-magnitude diagrams to select twenty promising cluster members, for which follow up spectroscopy was done. The observed spectra allowed a spectral classification of the stars. - Results: Two stars have emission lines, twelve are G-type stars, and six are late-O or early-B stars. - Conclusions: The cluster's extinction varies from A_{K_S} = 0.9 to A_{K_S} = 2.6, (or A_{V}~8 to A_{V}~23). G61.48+0.09 is a star forming region located at 2.5+/-0.4 Kpc. The cluster is younger than 10 Myr and has a minimum stellar mass of 1500+/-500 Solar masses. However, the actual total mass of the cluster remains undetermined, as we cannot see its whole stellar content.
description: 20 pages, 10 figures. Accepted for publication in A&A
Peterson-Lam-Shimozono's theorem is an affine analogue of quantum Chevalley formula
Creators: name: Chow, Chi Hong
Publisher: name: arXiv
Year: 2021
Subjects: subject: Algebraic Geometry (math.AG)
subject: Symplectic Geometry (math.SG)
subject: FOS: Mathematics
subject: 14N35, 57T15

description: We give a new proof of an unpublished result of Dale Peterson, proved by Lam and Shimozono, which identifies explicitly the structure constants, with respect to the quantum Schubert basis, for the $T$-equivariant quantum cohomology $QH^{\bullet}_T(G/P)$ of any flag variety $G/P$ with the structure constants, with respect to the affine Schubert basis, for the $T$-equivariant Pontryagin homology $H^T_{\bullet}(\mathcal{G}r)$ of the affine Grassmannian $\mathcal{G}r$ of $G$, where $G$ is any simple simply-connected complex algebraic group.
 Our approach is to construct an $H_T^{\bullet}(pt)$-algebra homomorphism by Gromov-Witten theory and show that it is equal to Peterson's map. More precisely, the map is defined via Savelyev's generalized Seidel representations which can be interpreted as certain Gromov-Witten invariants with input $H^T_{\bullet}(\mathcal{G}r)\otimes QH_T^{\bullet}(G/P)$. We determine these invariants completely, in a way similar to how Fulton and Woodward did in their proof of quantum Chevalley formula.
description: Accepted version; APC covered by Max Planck Society
A Two Energy Gap Preformed-Pair Scenario For the Cuprates: Implications for Angle-Resolved Photoemission Spectroscopy
Creators: name: Chien, Chih-Chun
name: He, Yan
name: Chen, Qijin
name: Levin, K.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Quantum Gases (cond-mat.quant-gas)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We show how, within a preformed pair scenario for the cuprate pseudogap, the nodal and antinodal responses in angle resolved photoemission spectroscopy necessarily have very different temperature $T$ dependences. We examine the behavior and the contrasting $T$ dependences for a range of temperatures both below and above $T_c$. Our calculations are based on a fully microscopic $T$-matrix approach for addressing pairing correlations in a regime where the attraction is stronger than BCS and the coherence length is anomalously short. Previously, the distinct nodal and anti-nodal responses have provided strong support for the "two-gap scenario" of the cuprates in which the pseudogap competes with superconductivity. Instead, our theory supports a picture in which the pseudogap derives from pairing correlations, identifying the two gap components with non-condensed and condensed pairs. It leads to reasonably good agreement with a range of different experiments in the moderately underdoped regime and we emphasize that here there is no explicit curve fitting. Ours is a microscopic rather than a phenomenological theory. We briefly address the more heavily underdoped regime in which the behavior is more complex.
description: 12 pages; 10 figures
Student's attribution of success and self-perception of abilities in the teacher-student interaction
Creators: name: Cartwright, Johanna S
Publisher: name: University of British Columbia
Year: 2011

description: Sevaral studies present evidence which supports the proposition that we infer our attitudes and internal states from observation of our overt behaviour and that these inferences are related to differential knowledge or attributions about the reasons for the behaviour. This proposition was examined in the teacher-student interaction from the student’s point of view. Sixty subjects participated in a learning experience. Half the subjects ware taught by a so called expert teacher (high-expert) and the remaining half were taught by a fellow student (low-expert). All subjects received success feed-back after the teaching period. It was expected that subjects in the high-expert condition would attribute success to the teacher more than those in the low-expert group. In addition it was predicted that subjects in the high-expert group would expect to do poorer on a second learning task without the help of the teacher, than subjects in the low-expert group. The results indicated that the experimental manipulation was successful in producing differential perception of teacher expertise. The two hypotheses, however, were not confirmed by the data. Several points of methodological and theoretical nature were raised, which suggest possible future avenues of research in the area of attribution in social interaction.
How Cuneiform Puns Inspired Some of the Bizarre Greek Constellations and Asterisms
Creators: name: Mchugh, John
Publisher: name: Archaeoastronomy and Ancient Technologies
Year: 2016
Subjects: celestial
mythology
wordplay
constellation
origin
cuneiform
heavenly writing
lumashi writing

description: Many of the Greek constellations catalogued in Claudius Ptolemy's mid-second century Almagest originated in Mesopotamia. Yet numerous other Greek constellations and asterisms do not correspond to Mesopotamian prototypes, and simultaneously display bizarre or incongruous features. This is especially apparent in Pegasus, a winged Horse severed at the navel; Crater, the "Wine-Bowl" stationed upon the back of Hydra, the "Water-Snake"; Cancer, a "Crab" that carries a "Manger" and "Donkeys" upon its shell; and Argo, the "Swift" Ship that sails backwards through the night sky without a prow. Because the aforementioned star-figures cannot be traced to Mesopotamian originals most historians of astronomy have assumed they are either indigenous Greek inventions or the creations of seafaring civilization that had direct contact with Greece. This article presents seminal research that offers a more elegant possibility, namely, that the origin of the aforementioned constellations and asterisms was indeed Mesopotamia, and can be traced to arcane precepts that informed the astronomers of that land. Cuneiform texts confirm that Mesopotamian astronomers were literally "writers" who envisioned the starry sky as "heavenly writing" that divulged inviolable truth through the medium of wordplay. In Mesopotamia the Pegasus Square was known as the "Field," and puns encrypted in its cuneiform spellings divulged that the Field be "changed into" a "flying horse severed at the navel"; wordplay in Hydra's cuneiform title disclosed that a "wine-bowl" be "placed upon the back of the "water-snake"; double entendre in Cancer's cuneiform appellative imparted that a "manger" and "two donkeys" be "placed between the shoulders of the crab"; and punning in the Mesopotamian prototype for Argo divulged that these stars were a "divine ship named ‘Swift'" which had its "prow cut off" and sailed "backward" through the southern sky. Circumstantial evidence implies that the Mesopotamian perception of the stars as a divine "text" that divulged enlightenment via puns had been transmitted directly to the Hellenic world at the inception of Greek alphabetic writing in the mid-eighth century BC. And it was this Mesopotamian celestial wisdom that inspired Greek astronomer-poets to reconfigure the preceding star-figures into the irrational images described by the puns.
Syzing and analisys of a photovoltaic system for self-consumption
Creators: name: Santos, César M. S.
Publisher: name: Neutro à Terra
Year: 2021

description: The use of photovoltaic systems is a key aspect for a sustainable energy future because allows the use of renewable energy, prevenient from the Sun, to produce the electricity needed. The present paper proposes the sizing of a PV system and his analysis to see how much impact it has on a company energy footprint and how much money they can save by not using electricity from the grid. For this project was used a simulator provided by SMA, showing that it’s possible to invest on a PV system and get the payback in a few years.
description: Neutro à Terra, N.º 23 (2019): Revista Técnico-Científica (Primeiro Semestre)
Potencial energético das correntes de maré na Ria de Aveiro
Creators: name: Rocha, João Pedro Pereira Da
Publisher: name: Neutro à Terra
Year: 2021

description: A energia das correntes de maré aproveita a energia cinética existente no movimento de água induzido pela propagação da maré. Esta fonte de energia tem uma série de vantagens em relação a outras energias renováveis. Contudo, o desenvolvimento de indústrias dedicadas à exploração de energia de correntes de maré ainda está num estado inicial. A Ria de Aveiro cuja dinâmica é dominada pela propagação de maré, é um local atraente para avaliar o potencial de produção deste tipo de energia. Neste contexto, foi utilizado o modelo numérico DELFT3D para quantificar o potencial energético das correntes de maré na Ria de Aveiro e para avaliar a viabilidade de uma possível instalação de turbinas
description: Neutro à Terra, N.º 23 (2019): Revista Técnico-Científica (Primeiro Semestre)
title: Dr. Douglas R. Knab, CAPT, MC, USN (Ret.) Oral History Interview Transcript
Creators: name: Uniformed Services University of the Health Sciences
Publisher: name: University Archives, Uniformed Services University of the Health Sciences, Bethesda, Maryland 20814
Year: 2010
Subjects: classificationCode: 3
subject: FOS: Medical and health sciences
classificationCode: 6.1
subject: FOS: History and archaeology

description: USU Oral History Interview Transcript
Dr. Douglas R. Knab, CAPT, MC, USN (Ret.)
Founding Chair, Department of Obstetrics and Gynecology
Associate Dean for Graduate Medical Education (GME) Liaison
09-07-2010
Interviewed by Megan Guglielmi
Rede Nacional de Transporte
Creators: name: Carneiro, Célia Maria Dos Santos
Publisher: name: Neutro à Terra
Year: 2021

description: Nos dias de hoje, a energia elétrica é um fator determinante na evolução da sociedade, ora no sector doméstico ora no sector industrial. A dependência do homem em utilizar eletricidade, levou a que o consumo aumentasse ao longo do tempo. Em 2017, o consumo de energia elétrica em Portugal totalizou 49,6 TWh, registando-se o valor mais elevado desde 2011. [1] Deste modo, torna-se indispensável que a segurança e qualidade de abastecimento de energia elétrica tenham um elevado grau de fiabilidade por parte do funcionamento das redes.
description: Neutro à Terra, N.º 23 (2019): Revista Técnico-Científica (Primeiro Semestre)
Editorial
Creators: name: Carvalho, José António Beleza
Publisher: name: Neutro à Terra
Year: 2021

description: Um pouco mais tarde que o habitual, pois os afazeres dos responsáveis pela edição da revista no fim de um ano letivo numa escola prestigiada de Engenharia são sempre muitos e complicados, voltamos à Vossa presença com mais uma edição da nossa revista Neutro-à-Terra. Estamos certos que a qualidade dos artigos publicados nesta edição seguramente que compensarão a curiosidade e o interesse de todos os nossos habituais leitores, que nos privilegiam com o seu interesse desde o início das nossas publicações. Já são 12 anos em que sem interrupções honramos o compromisso que temos convosco.
description: Neutro à Terra, N.º 23 (2019): Revista Técnico-Científica (Primeiro Semestre)
Relativistic magnetotransport in graphene
Creators: name: Mueller, Markus
name: Fritz, Lars
name: Sachdev, Subir
name: Schmalian, Joerg
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We study the thermal and electric transport of a fluid of interacting Dirac fermions as they arise in single-layer graphene. We include Coulomb interactions, a dilute density of charged impurities and the presence of a magnetic field to describe both the static and the low frequency response as a function of temperature T and chemical potential mu. In the critical regime mu << T where both bands above and below the Dirac point contribute to transport we find pronounced deviations from Fermi liquid behavior, universal, collision-dominated values for transport coefficients and a cyclotron resonance of collective nature. In the collision-dominated high temperature regime the linear thermoelectric transport coefficients are shown to obey the constraints of relativistic magnetohydrodynamics which we derive microscopically from Boltzmann theory. The latter also allows us to describe the crossover to disorder-dominated Fermi liquid behavior at large doping and low temperatures, as well as the crossover to the ballistic regime at high fields.
description: Proceedings of the Landau Memorial Conference 2008
Electron efficiency in LHC Run-2 with the ATLAS experiment
Creators: name: Ducu, Otilia
Publisher: name: arXiv
Year: 2024
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The document presents a general overview of the electron reconstruction, identification and isolation performance in the ATLAS experiment. The results are obtained using 13 TeV proton-proton collision data collected during the LHC Run-2. The electron reconstruction efficiency is higher than 97%, and the ratio of data to Monte Carlo simulation efficiency is close to unity, with associated uncertainties generally smaller than 0.1%. The electron identification is shown for three working points, and depending on the electron $E_T$, it can be as low as 60%, increasing to more than 80% above 50 GeV. The correction factors are close to one, generally within 5%. Five isolation working points are recommended in the ATLAS experiment, to successfully reject fake/non-prompt electrons. Their dependency on the electron identification working points is shown and discussed, as well as their pile-up dependency, and their performance versus electron $E_T$ and $η$.
 Document based on a presentation at the XI International Conference on New Frontiers in Physics (ICNFP 2022).
 keywords; prompt electrons, reconstruction, identification, isolation, fake/non-prompt electrons
description: 14 pages, 6 figures, ICNFP 2022
eNetXplorer: an R package for the quantitative exploration of elastic net families for generalized linear models
Creators: name: Candia, Julian
name: Tsang, John
Publisher: name: F1000 Research Limited
Year: 2020

description: Background: Rigorous, exploratory analysis for the identification of correlates in a multivariable setting is needed in a variety of contexts, especially in systems biology where data involving a large number of features are highly prevalent. In many scenarios, e.g. typical single- and multi-omics data analysis, regression requires regularization models such as ridge and lasso. To explore different levels of regularization and penalty in regression, the elastic net spans the full range from ridge to lasso. However, there remain several open issues, ranging from model selection and assessment of model-level statistical significance to feature selection and significance.

Results: By generating null-model ensembles via random permutations of the response variable, eNetXplorer provides a cross-validated framework to address these outstanding issues. Feature importance is evaluated by flexible criteria based on out-of-bag predictions, which are assessed via user-defined quality functions. eNetXplorer fits linear, binomial, multinomial, and Cox regression models and provides a set of standard plots, summary statistics and output tables for downstream analysis. This R package is available under GPLv3 license at CRAN.

Significance: eNetXplorer enables quantitative, exploratory analysis to generate hypotheses on which features may be associated with biological phenotypes of interest, such as for the identification of biomarkers for therapeutic responsiveness.
Understanding the role of peer involvement in UK harm reduction interventions
Creators: name: Boaden, Katharine
Publisher: name: University of East London
Year: 2023
Subjects: Peer work
Harm reduction
People who use drugs
Living experience
Active drug use
United Kingdom

description: Aims: In recent decades British drug policy has shifted from a harm reduction approach to an abstinence-based recovery approach, changing the landscape of support available to people who continue to use drugs. People who use drugs (PWUD) are a highly stigmatised and marginalised population with high levels of mental health need, who often face barriers to accessing services. In other countries, peer work has provided opportunities for PWUD to deliver harm reduction interventions to their peers with a number of beneficial outcomes, but there is an absence of research on the experiences of peer workers in the UK. This study sought to understand the experiences of PWUD engaged as peer workers offering harm reduction interventions to fellow drug users in the UK.

Method: Semi-structured interviews were conducted with eight peer workers with living experience of drug use, recruited through a harm reduction organisation. Thematic analysis was used to interpret the data.

Results: Data analysis discovered four main themes: (1) Changing and Enhancing Perceptions of People Who Use Drugs, which referred to changes in the ways peer workers were perceived by others, allowing them to embrace a more positive perception of themselves; (2) A Unique and Valuable Role, which demonstrated the ways in which peer workers recognised their skills and, which made them feel valued and useful; (3) Positive Impact of Peer Work, which highlighted the changes that had occurred following involvement in peer work, including a reduction in drug use and improved mental health; (4) Fragility of Peer Work, which demonstrated the more challenging aspects of the work, including anxiety regarding the precariousness of the peer work role.

Conclusion: The study highlighted a variety of experiences of peer work, including positive experiences and more challenging aspects of the role. The findings have implications for both harm reduction organisations seeking to develop peer work programmes and mental health services that seek to support PWUD. Suggestions for future policy development and research that builds on this emerging approach have also been discussed.
Experimental search potential for sbottom via $\tildeχ^{\pm}_1$ decays at the LHC Run-3 and HL-LHC, in final states with same-sign leptons and multiple jets
Creators: name: Ducu, Otilia
Publisher: name: arXiv
Year: 2024
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: This paper explores the experimental search potential for sbottom pair production in an R-parity conserving scenario at the LHC Run-3 and HL-LHC. The sbottom decays with a 100% BR via a chargino, $\tilde{b}_1 \to t \tildeχ_1^\pm$, which subsequently decays to a $W$ boson and a neutralino, $\tildeχ_1^\pm \to W \tildeχ_1^0$, also with a 100% BR. The study follows the ATLAS object definitions and event selection criteria from Ref. JHEP06(2020)046, focusing on Rpc2L1b and Rpc2L2b signal regions defined with same-sign leptons and at least one $b$-tagged jet. Projected exclusion limits are presented in the $\tilde{b}_1$ - $\tildeχ_1^0$ mass plane for three center-of-mass energies (13 TeV, 13.6 TeV, and 14 TeV) and three integrated luminosity scenarios (139 fb$^{-1}$, 300 fb$^{-1}$, and 3000 fb$^{-1}$).
 keywords: sbottom pair production, same-sign leptons, multi-leptons
description: 12 pages, 6 figures
Properties of the SU(Nc) Gluon Plasma
Creators: name: Datta, Saumen
name: Gupta, Sourendu
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: We investigate the deconfinement transition in SU(Nc) gauge theories, and properties of the deconfined phase. A detailed lattice study of SU(4) and SU(6) gauge theories are conducted, and finite volume and cutoff effects on thermodynamic observables are studied. The scaling of the deconfinement transition point with lattice spacing is used to calculate the scale, Lambda_MSbar. The continuum estimates of the thermodynamic quantities are used to study properties of the gluon plasma. In particular, the approach to conformal limit is studied. We do not find any evidence of a strongly coupled, conformal phase in these theories.
description: 7 pages, 5 figures, talk presented at The XXVII International Symposium on Lattice Field Theory, July 26-31, 2009, Peking University, Beijing, China
AC transport properties of single and bilayer graphene
Creators: name: Bernad, J. Z.
name: Zuelicke, U.
name: Ziegler, K.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We have performed a theoretical study of electronic transport in single and bilayer graphene based on the standard linear-response (Kubo) formalism and continuum-model descriptions of the graphene band structure. We are focusing especially on the interband contribution to the optical conductivity. Analytical results are obtained for a variety of situations, which allow clear identification of features in the conductivity that are associated with relevant electronic energy scales. Our work extends previous numerical studies and elucidates ways to infer electronic properties of graphene samples from optical-conductivity measurements.
description: 4 pages, 2 figures, contribution to EP2DS-18, to appear in Physica E
D2.1 IPSP Scoping Report_under EC review
Creators: name: Bargheer, Margo
name: Bosman, Jeroen
name: Drahomira, Cupar
name: Frantsvåg, Jan Erik
name: Klaus, Tabea
name: Kramer, Bianca
name: Laakso, Mikael
name: Manista, Frank
name: Melinščak Zlodi, Iva
name: Peruginelli, Ginevra
name: Proudman, Vanessa
name: Rooryck, Johan
name: Souyioultzoglou, Irakleitos
name: Stojanovski, Jadranka
name: Stone, Graham
name: Verheusen, Astrid
Publisher: name: Zenodo
Year: 2023
Subjects: Open Access publishing
institutional publishing
academic institutions
surveys
scholarly communication

description: In the transition towards Open Access (OA), institutional publishing is challenged by fragmentation and varying service quality, visibility, and sustainability. To address this issue, DIAMAS gathers 23 organisations from 12 European countries, well-versed in OA academic publishing and scholarly communication. The project will: 1. Map the current landscape of Institutional Publishing Service Providers (IPSPs) in 25 countries of the ERA with special attention for IPSPs that do not charge fees for publishing or reading. This will yield a taxonomy of IPSPs and an IPSP landscape report, a basis for the rest of the project. 2. Coordinate and improve the efficiency and quality of IPSPs by developing an Extensible Quality Standard for Institutional Publishing (EQSIP). This quality standard will professionalise, strengthen, and reduce the fragmentation of institutional publishing in Europe. EQSIP will serve as a benchmark for a gap analysis of the data. The report is the main deliverable of a scoping exercise undertaken in the context of Work Package 2, with an aim to identify focus points for the project’s landscaping activities; it draws on existing resources and primary research to provide a framework for analysing existing gaps, and inform decisions on the services to be designed by DIAMAS. The definitions and typologies in the document address issues related to the governance, the services, the funding streams and the main outputs curated by Institutional Publishing Service Providers (IPSPs), thus enabling partners to gain an understanding of the diverse operational models and roles of IPSPs within the institutional open access publishing ecosystem. The report also presents the conclusions of the geographical scoping for the project’s planned survey to collect IPSP data.
description: Deliverable under EC review
General relativistic compact stars with exotic matter
Creators: name: Yasutake, Nobutoshi
name: Maruyama, Toshiki
name: Tatsumi, Toshitaka
name: Kiuchi, Kenta
name: Kotake, Kei
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We study structures of general relativistic compact stars with exotic matter. Our study is based on axisymetric and stationary formalism including purely toroidal magnetic field. We also study the finite size effects of quark-hadron mixed phase on structures of magnetars. For hybrid stars, we find a characteristic distribution of magnetic field, which has a discontinuity originated in the quark-hadron mixed phase. These distributions of magnetic field will change astrophysical phenomena, such as cooling processes.
description: 5 pages, 3 figures, conference. in press
Probing the Ground State Properties of Iron-based Superconducting Pnictides and Related Systems by Muon-Spin Spectroscopy
Creators: name: Amato, A.
name: Khasanov, R.
name: Luetkens, H.
name: Klauss, H. -H.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: In this short review, we attempt to give a comprehensive discussion of studies performed to date by muon-spin spectroscopy (more precisely the relaxation and rotation technique, also know as \muSR technique) on the recently discovered layered iron-based superconductors. On one side, \muSR has been used to characterized the magnetic state of different families of layered iron-based systems. Similarly the subtle interplay of the magnetic state and the structural transition present in some families has been investigated. We will also discuss the information provided by this technique on the interaction between the magnetic state and the superconducting phase. Finally the \muSR technique has been used to investigate the magnetic penetration depth of the superconducting ground state. The study of its absolute value, temperature and magnetic field dependence provides crucial tests for investigating possible unconventional superconducting states in such systems.
description: 10 pages, 5 figures. Physica C Special Edition on Superconducting Pnictides. Version 2: Fig. 3 modified due to data corrections in Ref. 6, typos corrected
D2.1 IPSP Scoping Report_approved by the EC
Creators: name: Bargheer, Margo
name: Bosman, Jeroen
name: Drahomira, Cupar
name: Frantsvåg, Jan Erik
name: Klaus, Tabea
name: Kramer, Bianca
name: Laakso, Mikael
name: Manista, Frank
name: Melinščak Zlodi, Iva
name: Peruginelli, Ginevra
name: Proudman, Vanessa
name: Rooryck, Johan
name: Souyioultzoglou, Irakleitos
name: Stojanovski, Jadranka
name: Stone, Graham
name: Verheusen, Astrid
Publisher: name: Zenodo
Year: 2023
Subjects: Open Access publishing
institutional publishing
academic institutions
surveys
scholarly communication

description: In the transition towards Open Access (OA), institutional publishing is challenged by fragmentation and varying service quality, visibility, and sustainability. To address this issue, DIAMAS gathers 23 organisations from 12 European countries, well-versed in OA academic publishing and scholarly communication. The project will: 1. Map the current landscape of Institutional Publishing Service Providers (IPSPs) in 25 countries of the ERA with special attention for IPSPs that do not charge fees for publishing or reading. This will yield a taxonomy of IPSPs and an IPSP landscape report, a basis for the rest of the project. 2. Coordinate and improve the efficiency and quality of IPSPs by developing an Extensible Quality Standard for Institutional Publishing (EQSIP). This quality standard will professionalise, strengthen, and reduce the fragmentation of institutional publishing in Europe. EQSIP will serve as a benchmark for a gap analysis of the data.

The report is the main deliverable of a scoping exercise undertaken in the context of Work Package 2, with an aim to identify focus points for the project’s landscaping activities; it draws on existing resources and primary research to provide a framework for analysing existing gaps, and inform decisions on the services to be designed by DIAMAS.

The definitions and typologies in the document address issues related to the governance, the services, the funding streams and the main outputs curated by Institutional Publishing Service Providers (IPSPs), thus enabling partners to gain an understanding of the diverse operational models and roles of IPSPs within the institutional open access publishing ecosystem. The report also presents the conclusions of the geographical scoping for the project’s planned survey to collect IPSP data.

 
description: Deliverable approved by the European Commission