cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
title: Camponotus Mayr, 1861 (Hymenoptera: Formicidae) of Cyprus: generic synopsis and description of a new species
Creators: name: Salata, Sebastian
name: Demetriou, Jakovos
name: Georgiadis, Christos
name: Borowiec, Lech
Publisher: name:  PENERBIT UMS
Year: 2023

description: Sixteen species of the genus Camponotus have been reported from Cyprus. Nevertheless,
material sampling on the island confirms the presence of 10 species. Camponotus (Tanaemyrmex) troodosensis
sp. nov. is described as a new species to science, collected from low and mid altitudes in pine
forests of the Troodos mountain range. Camponotus (Myrmamblys) cf. vitiosus, an Eastern Palaearctic
species, is recorded from the island only from a single site in the Cedar Valley and is presented for the
first time as a new alien species. An identification key to the 10 species of Camponotus known from
Cyprus is provided. Camponotus kiesenwetteri var. cypria Emery, 1920 is transferred from a junior
synonym of Camponotus kiesenwetteri (Roger, 1859) to a synonym of Camponotus libanicus André,
1885, new synonymy.
Anomalous Plasticity of Body-Centered-Cubic Crystals with Non-Schmid Effect
Creators: name: Cho, Hansohl
name: Bronkhorst, Curt A.
name: Mourad, Hashem M.
name: Mayeur, Jason R.
name: Luscher, D. J.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Plastic deformations in body-centered-cubic (BCC) crystals have been of critical importance in diverse engineering and manufacturing contexts across length scales. Numerous experiments and atomistic simulations on BCC crystals reveal that classical crystal plasticity models with the Schmid law are not adequate to account for abnormal plastic deformations often found in these crystals. In this paper, we address a continuum mechanical treatment of anomalous plasticity in BCC crystals exhibiting non-Schmid effects, inspired from atomistic simulations recently reported. Specifically, anomalous features of plastic flows are addressed in conjunction with a single crystal constitutive model involving two non-Schmid projection tensors widely accepted for representing non-glide components of an applied stress tensor. Further, modeling results on a representative BCC single crystal (tantalum) are presented and compared to experimental data at a range of low temperatures to provide physical insight into deformation mechanisms in these crystals with non-Schmid effects.
description: 33 pages, 8 figures
Elastic null curve flows, nonlinear $C$-integrable systems, and geometric realization of Cole-Hopf transformations
Creators: name: Yüzbaşı, Zühal Küçükarslan
name: Anco, Stephen C.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Mathematical Physics (math-ph)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences

description: Elastic (stretching) flows of null curves are studied in three-dimensional Minkowski space. As a main tool, a natural type of moving frame for null curves is introduced, without use of the pseudo-arclength. This new frame is related to a Frenet null frame by a gauge transformation that belongs to the little group contained in the Lorentz group $SO(2,1)$ and provides an analog of the Hasimoto transformation (relating a parallel frame to a Frenet frame for curves in Euclidean space). The Cartan structure equations of the transformed frame are shown to encode a hereditary recursion operator giving a two-component generalization of the recursion operator of Burgers equation, as well as a generalization of the Cole-Hopf transformation. Three different hierarchies of integrable systems are obtained from the various symmetries of this recursion operator. The first hierarchy contains two-component Burgers-type and nonlinear Airy-type systems; the second hierarchy contains novel quasilinear Schrödinger-type (NLS) systems; and the third hierarchy contains semilinear wave equations (in two-component system form). Each of these integrable systems is shown to correspond to a geometrical flow of a family of elastic null curves in three-dimensional Minkowski space.
description: 33 pages. Revision of abstract, introduction, and conclusion
Crossed product of a C*-algebra by a semigroup of bounded positive linear maps. Interactions
Creators: name: Kwasniewski, B. K.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Operator Algebras (math.OA)
subject: FOS: Mathematics
subject: 46L05; 46L55; 47L30; 47D99

description: The paper presents a construction of the crossed product of a C*-algebra by a commutative semigroup of bounded positive linear maps generated by partial isometries. In particular, it generalizes Antonevich, Bakhtin, Lebedev's crossed product by an endomorphism, and is related to Exel's interactions. One of the main goals is the Isomorphism Theorem established in the case of actions by endomorphisms.
description: 20 pages
Saxifraga caesia Linnaeus 1753
Creators: name: Jarvis, Charlie
Publisher: name: Linnaean Society of London in association with the Natural History Museum
Year: 2007
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Saxifragales
Saxifragaceae
Saxifraga
Saxifraga caesia

description: Saxifraga caesia Linnaeus, Species Plantarum 1: 399. 1753.
"Habitat in Alpibus Helveticis, Austriacis, Pyrenacis, Baldo." RCN: 3143.
 Lectotype (Webb in Bot. J. Linn. Soc. 95: 261. 1987): Herb. Burser XVI(1): 70 (UPS).
 Current name:  Saxifraga caesia  L. (Saxifragaceae).
description: Published as part of Jarvis, Charlie, 2007, Chapter 7: Linnaean Plant Names and their Types (part S), pp. 806-877 in Order out of Chaos. Linnaean Plant Types and their Types, London :Linnaean Society of London in association with the Natural History Museum on page 820, DOI: 10.5281/zenodo.291971
Holographic complexity and non-commutative gauge theory
Creators: name: Couch, Josiah
name: Eccles, Stefan
name: Fischler, Willy
name: Xiao, Ming-Lei
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We study the holographic complexity of noncommutative field theories. The four-dimensional $\mathcal{N}=4$ noncommutative super Yang-Mills theory with Moyal algebra along two of the spatial directions has a well known holographic dual as a type IIB supergravity theory with a stack of D3 branes and non-trivial NS-NS B fields. We start from this example and find that the late time holographic complexity growth rate, based on the "complexity equals action" conjecture, experiences an enhancement when the non-commutativity is turned on. This enhancement saturates a new limit which is exactly 1/4 larger than the commutative value. We then attempt to give a quantum mechanics explanation of the enhancement. Finite time behavior of the complexity growth rate is also studied. Inspired by the non-trivial result, we move on to more general setup in string theory where we have a stack of D$p$ branes and also turn on the B field. Multiple noncommutative directions are considered in higher $p$ cases.
Learning Contrastive Self-Distillation for Ultra-Fine-Grained Visual Categorization Targeting Limited Samples
Creators: name: Fang, Ziye
name: Jiang, Xin
name: Tang, Hao
name: Li, Zechao
Publisher: name: arXiv
Year: 2023
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Multimedia (cs.MM)
subject: FOS: Computer and information sciences

description: In the field of intelligent multimedia analysis, ultra-fine-grained visual categorization (Ultra-FGVC) plays a vital role in distinguishing intricate subcategories within broader categories. However, this task is inherently challenging due to the complex granularity of category subdivisions and the limited availability of data for each category. To address these challenges, this work proposes CSDNet, a pioneering framework that effectively explores contrastive learning and self-distillation to learn discriminative representations specifically designed for Ultra-FGVC tasks. CSDNet comprises three main modules: Subcategory-Specific Discrepancy Parsing (SSDP), Dynamic Discrepancy Learning (DDL), and Subcategory-Specific Discrepancy Transfer (SSDT), which collectively enhance the generalization of deep models across instance, feature, and logit prediction levels. To increase the diversity of training samples, the SSDP module introduces adaptive augmented samples to spotlight subcategory-specific discrepancies. Simultaneously, the proposed DDL module stores historical intermediate features by a dynamic memory queue, which optimizes the feature learning space through iterative contrastive learning. Furthermore, the SSDT module effectively distills subcategory-specific discrepancies knowledge from the inherent structure of limited training data using a self-distillation paradigm at the logit prediction level. Experimental results demonstrate that CSDNet outperforms current state-of-the-art Ultra-FGVC methods, emphasizing its powerful efficacy and adaptability in addressing Ultra-FGVC tasks.
description: Accepted for Publication in TCSVT
Functional differences in engineered myocardium from embryonic stem cell-derived versus neonatal cardiomyocytes.
Creators: name: Feinberg, Adam
name: Ripplinger, Crystal M.
name: Meer, Peter Van Der
name: Sheehy, Sean P.
name: Domian, Ibrahim
name: Chien, Kenneth R.
name: Parker, Kevin Kit
Publisher: name: Carnegie Mellon University
Year: 2013
Subjects: subject: 90399 Biomedical Engineering not elsewhere classified
subject: FOS: Medical engineering

description: Stem cell-derived cardiomyocytes represent unique tools for cell- and tissue-based regenerative therapies, drug discovery and safety, and studies of fundamental heart-failure mechanisms. However, the degree to which stem cell-derived cardiomyocytes compare to mature cardiomyocytes is often debated. We reasoned that physiological metrics of engineered cardiac tissues offer a means of comparison. We built laminar myocardium engineered from cardiomyocytes that were differentiated from mouse embryonic stem cell-derived cardiac progenitors or harvested directly from neonatal mouse ventricles, and compared their anatomy and physiology in vitro. Tissues assembled from progenitor-derived myocytes and neonate myocytes demonstrated similar cytoskeletal architectures but different gap junction organization and electromechanical properties. Progenitor-derived myocardium had significantly less contractile stress and slower longitudinal conduction velocity than neonate-derived myocardium, indicating that the developmental state of the cardiomyocytes affects the electromechanical function of the resultant engineered tissue. These data suggest a need to establish performance metrics for future stem cell applications.
Soft-gluon resummation effects on parton distributions
Creators: name: Corcella, Gennaro
name: Magnea, Lorenzo
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We gauge the impact of soft-gluon resummation on quark distributions by performing a simple fit of Deep Inelastic Scattering structure function data using next-to-leading order (NLO) and next-to-leading-logarithmic (NLL)-resummed coefficient functions. We make use of NuTeV charged-current data, as well as New Muon Collaboration (NMC) and Bologna-CERN-Dubna-Munich-Saclay (BCDMS) neutral-current results, which probe large values of x. Our results suggest that the inclusion of resummation effects in global fits of parton distributions is both feasible and desirable, in order to achieve at large x the accuracy goals of the LHC physics program.
description: 19 pages, 10 figures. Few changes after referee report, one figure and references added, published version
Tracing high energy radiation with molecular lines near deeply embedded protostars
Creators: name: Stauber, P.
name: Benz, A. O.
name: Jorgensen, J. K.
name: van Dishoeck, E. F.
name: Doty, S. D.
name: van der Tak, F. F. S.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Submillimeter lines of CN, NO, CO+ and SO+, and upper limits on SH+ and N2O are observed with the James Clerk Maxwell Telescope in two high-mass and up to nine low-mass young stellar objects and compared with chemical models. Constant fractional abundances derived from radiative transfer modeling of the line strengths are x(CN) ~ a few x 10^{-11}-10^{-8}, x(NO) ~ 10^{-9}-10^{-8} and x(CO+) ~ 10^{-12}-10^{-10}. SO+ has abundances of a few x 10^{-11} in the high-mass objects and upper limits of ~ 10^{-12}-10^{-11} in the low-mass sources. All abundances are up to 1-2 orders of magnitude higher if the molecular emission is assumed to originate mainly from the inner region (< 1000 AU) of the envelope. For high-mass sources, the CN, SO+ and CO+ abundances and abundance ratios are best explained by an enhanced far-ultraviolet (FUV) field impacting gas at temperatures of a few hundred K. The observed column densities require that this region of enhanced FUV has scales comparable to the observing beam, such as in a geometry in which the enhanced FUV irradiates outflow walls. For low-mass sources, the required temperatures within the FUV models of T > 300 K are much higher than found in models, so that an X-ray enhanced region close to the protostar (r < 500 AU) is more plausible. The observed abundances imply X-ray fluxes for the Class 0 objects of L_X ~ 10^{29}-10^{31} erg s^{-1}, comparable to those observed from low-mass Class I protostars. Spatially resolved data are needed to clearly distinguish the effects of FUV and X-rays for individual species.
description: accepted by A&A (02/01/2007)
Saxifraga cernua Linnaeus 1753
Creators: name: Jarvis, Charlie
Publisher: name: Linnaean Society of London in association with the Natural History Museum
Year: 2007
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Saxifragales
Saxifragaceae
Saxifraga
Saxifraga cernua

description: Saxifraga cernua Linnaeus, Species Plantarum 1: 403. 1753.
"Habitat in Alpibus Lapponicis frequens." RCN: 3164.
 Lectotype (Siplivinsky in Novosti Sist. Vyssh. Rast. 14: 108. 1977): Herb. Linn. No. 575.44 (LINN).
 Current name:  Saxifraga cernua  L. (Saxifragaceae).
 Note: Webb (in Bot. J. Linn. Soc. 95: 264. 1987), evidently unaware of Siplivinsky’s earlier choice, independently designated the same type.
description: Published as part of Jarvis, Charlie, 2007, Chapter 7: Linnaean Plant Names and their Types (part S), pp. 806-877 in Order out of Chaos. Linnaean Plant Types and their Types, London :Linnaean Society of London in association with the Natural History Museum on page 820, DOI: 10.5281/zenodo.291971
title: Revista de Ciências da Computação, Vol 12 (2017)
title: Revista de Ciências da Computação
titleType: AlternativeTitle
Creators: name: Revista De Ciências Da Computação
Publisher: name: Revista de Ciências da Computação
Year: 2019

description: Editorial 12 Detecção de Lesões de Câncer de Pele Utilizando Análise de Componentes Independentes e Análise Discriminante Linear Projeto de um Cluster Didático para Programação Paralela e Distribuída (Parte I) Simulador Heads-Up Texas Hold'em Aquarização: perspético sobre a sociedade do Big Data Alan Turing: da necessidade do cálculo, a máquina de Turing até à computação
From dense-dilute duality to self duality in high energy evolution
Creators: name: Kovner, Alex
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: I describe recent work on inclusion of Pomeron loops in the high energy evolution. In particular I show that the complete eikonal high energy evolution kernel must be selfdual.
description: Talk given at DIS05, April 2005, Madison
Geo-Encryption Protocol For Mobile Networks
Creators: name: Al-Fuqaha, Ala
name: Al-Ibrahim, Omar
name: Rayes, Ammar
Publisher: name: arXiv
Year: 2017
Subjects: subject: Cryptography and Security (cs.CR)
subject: FOS: Computer and information sciences

description: We propose a geo-encryption protocol that allow mobile nodes to communicate securely by restricting the decryption of a message to a particular location and time period. Our protocol will handle the exchange of movement parameters, so that a sender is able to geo-encrypt messages to a moving decryption zone that contains a mobile node's estimated location. We also present methods for estimating the node's movement parameters to allow for geo-encryption. Finally, we evaluate our model by measuring the induced overhead to the network and its performance in terms of decryption ratio.
Unveiling the nature of INTEGRAL objects through optical spectroscopy. V. Identification and properties of 21 southern hard X-ray sources
Creators: name: Masetti, N.
name: Morelli, L.
name: Palazzi, E.
name: Galaz, G.
name: Bassani, L.
name: Bazzano, A.
name: Bird, A. J.
name: Dean, A. J.
name: Israel, G. L.
name: Landi, R.
name: Malizia, A.
name: Minniti, D.
name: Schiavone, F.
name: Stephen, J. B.
name: Ubertini, P.
name: Walter, R.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Optical spectroscopic identification of the nature of 21 unidentified southern hard X-ray objects is reported here in the framework of our campaign aimed at determining the nature of newly-discovered and/or unidentified sources detected by INTEGRAL. Our results show that 5 of these objects are magnetic Cataclysmic Variables (CVs), 4 are High-Mass X-ray Binaries (HMXBs; one of which is in the Large Magellanic Cloud) and 12 are Active Galactic Nuclei (AGNs). When feasible, the main physical parameters for these hard X-ray sources are also computed using the multiwavelength information available in the literature. These identifications further underscore the importance of INTEGRAL in the study of the hard X-ray spectrum of AGNs, HMXBs and CVs, and the usefulness of a strategy of catalogues cross-correlation plus optical spectroscopy to securely pinpoint the actual nature of the X-ray sources detected with INTEGRAL.
description: 14 pages, 7 figures, 6 tables, accepted for publication on A&A, main journal. Figures 1 and 2 and Table 1 will only appear on the on-line version of the paper
Axion as a cold dark matter candidate: Proof to fully nonlinear order
Creators: name: Noh, Hyerim
name: Hwang, Jai-chan
name: Park, Chan-Gyung
Publisher: name: arXiv
Year: 2017
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We present a proof of the axion as a cold dark matter candidate to the fully nonlinear order perturbations based on Einstein's gravity. We consider the axion as a coherently oscillating massive classical scalar field without interaction. We present the fully nonlinear and exact, except for {\it ignoring} the transverse-tracefree tensor-type perturbation, hydrodynamic equations for an axion fluid in Einstein's gravity. We show that the axion has the characteristic pressure and anisotropic stress, the latter starts to appear from the second-order perturbation. But these terms do not directly affect the hydrodynamic equations in our axion treatment. Instead, what behaves as the effective pressure term in relativistic hydrodynamic equations is the perturbed lapse function and the relativistic result coincides exactly with the one known in the previous non-relativistic studies. The effective pressure term leads to a Jeans scale which is of the solar-system scale for conventional axion mass. As the fully nonlinear and relativistic hydrodynamic equations for an axion fluid coincide exactly with the ones of a zero-pressure fluid in the super-Jeans scale, we have proved the cold dark matter nature of such an axion in that scale.
description: 6 pages, no figure
Renormalization Group Evolution of Dirac Neutrino Masses
Creators: name: Lindner, Manfred
name: Ratz, Michael
name: Schmidt, Michael Andreas
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: There are good reasons why neutrinos could be Majorana particles, but there exist also a number of very good reasons why neutrinos could have Dirac masses. The latter option deserves more attention and we derive therefore analytic expressions describing the renormalization group evolution of mixing angles and of the CP phase for Dirac neutrinos. Radiative corrections to leptonic mixings are in this case enhanced compared to the quark mixings because the hierarchy of neutrino masses is milder and because the mixing angles are larger. The renormalization group effects are compared to the precision of current and future neutrino experiments. We find that, in the MSSM framework, radiative corrections of the mixing angles are for large \tanβcomparable to the precision of future experiments.
description: 19 pages, 5 figures; error in eq. 8 corrected, references added
Revista de Ciências da Computação, Vol 13 (2018)
Creators: name: Revista De Ciências Da Computação
Publisher: name: Revista de Ciências da Computação
Year: 2018

description: Editorial 13 Projeto de um Cluster Didático para Programação Paralela e Distribuída (Parte II)...1-24 Redes de Recomendações na Seleção de Recursos Humanos...25-36 Aplicação para planeamento de carteiras de ações: algoritmo de ordenação bi-critério...37-48 Visualização de redes definidas pelas hiperligações entre artigos da Wikipedia...49-66 Bike-Index – um índice de acessibilidade velocípede recorrendo a programação em ambiente SIG...67-88
Saxifraga cespitosa Linnaeus 1753
Creators: name: Jarvis, Charlie
Publisher: name: Linnaean Society of London in association with the Natural History Museum
Year: 2007
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Saxifragales
Saxifragaceae
Saxifraga
Saxifraga cespitosa

description: Saxifraga cespitosa Linnaeus, Species Plantarum 1: 404. 1753.
"Habitat in Alpibus Lapponicis, Helveticis, Tridentinis, Monspelii." RCN: 3172.
 Lectotype (Webb, Proc. Roy. Irish Academy 53B: 222. 1950): Herb. Linn. No. 575.57 (LINN).
 Current name:  Saxifraga cespitosa  L. (Saxifragaceae).
 Note: See additional notes by Webb (in Bot. J. Linn. Soc. 95: 265. 1987).
description: Published as part of Jarvis, Charlie, 2007, Chapter 7: Linnaean Plant Names and their Types (part S), pp. 806-877 in Order out of Chaos. Linnaean Plant Types and their Types, London :Linnaean Society of London in association with the Natural History Museum on page 820, DOI: 10.5281/zenodo.291971
Revista de Ciências da Computação, Vol 14 (2019)
Creators: name: Revista De Ciências Da Computação
Publisher: name: Revista de Ciências da Computação
Year: 2019

description: Editorial 2019, n.14 Uma breve viagem pela Inteligência Artificial...1-34 SiGeFA - Sistema de Gestão de Frequências de Alunos...35-50 O padrão OBAA no desenvolvimento de repositórios de objetos de aprendizagem: o caso de literacia dos oceanos nos Açores...51-66 Caracterização da Faturação em Portugal: sob a perspetiva da certificação de programas informáticos de faturação...67-84 Seleção de Atributos de Dados Inconsistentes em ambiente HDF5+Python na cloud INCD...85-112 Sistema Especialista para Apoio do Processo de Diagnóstico Médico Baseado na Coleta de Dados Extraído no Processo de Triagem para o Hospital Municipal da Samba...113-130
Revista de Ciências da Computação, Vol 2 (2007)
Creators: name: Revista De Ciências Da Computação
Publisher: name: Revista de Ciências da Computação
Year: 2018

description: Editorial 2 Modelação Computacional Baseada em Agentes: Enfrentar a Complexidade...0-13 Uma metodologia para regras de associação de filtragem...14-25 Análise de Agrupamento Incremental – Segmentação de Pontos de Retalho...26-38 Uma escala para medir a dificuldade dos quebra-cabeças de Sudoku...39-55 Um Novo Algoritmo para Encontrar a Constituência Mais Favorável na Análise de Dados pela Envolvente...56-64 A Necessidade de uma Metodologia para a Definição Estratégica da Digitalização do Negócio das PME...65-84 Exportação de lições Moodle para pacotes SCORM...85-97 Processamento Paralelo Aplicado a um Problema de Engenharia de Materiais...98-108
Saxifraga cotyledon Linnaeus 1753
Creators: name: Jarvis, Charlie
Publisher: name: Linnaean Society of London in association with the Natural History Museum
Year: 2007
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Saxifragales
Saxifragaceae
Saxifraga
Saxifraga cotyledon

description: Saxifraga cotyledon Linnaeus, Species Plantarum 1: 398. 1753.
"Habitat in Alpibus Europae." RCN: 3139.
 Lectotype (Webb in Bot. J. Linn. Soc. 95: 260. 1987): Herb. Linn. No. 575.1, left specimen (LINN).
 Current name:  Saxifraga cotyledon  L. (Saxifragaceae).
description: Published as part of Jarvis, Charlie, 2007, Chapter 7: Linnaean Plant Names and their Types (part S), pp. 806-877 in Order out of Chaos. Linnaean Plant Types and their Types, London :Linnaean Society of London in association with the Natural History Museum on page 820, DOI: 10.5281/zenodo.291971
Revista de Ciências da Computação, Vol 3 (2008)
Creators: name: Revista De Ciências Da Computação
Publisher: name: Revista de Ciências da Computação
Year: 2018

description: Editorial 3 Avaliação de Clusters de Titulares de Cartão de Crédito...1-11 Descoberta de Padrões Sequenciais Utilizando Árvores Orientadas...12-22 Business Intelligence no Suporte a Decisões sobre Comunicações: Descrição de um Caso...23-37 Vantagens do uso de regras nas pesquisas on-line...38-49 Sistema Numérico Ternário com Deslocamento Zero: a maneira mais económica de representar números...50-58 Legibilidade de Artigos Científicos: Análise de Dados da RCC...59-65
Kinetic versus Magnetic Chaos in Toroidal Plasmas: A systematic quantitative comparison
Creators: name: Moges, Henok T.
name: Antonenas, Yannis
name: Anastassiou, Giorgos
name: Skokos, Charalampos
name: Kominis, Yannis
Publisher: name: arXiv
Year: 2023
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: Magnetic field line chaos occurs under the presence of non-axisymmetric perturbations of an axisymmetric equilibrium and is manifested by the destruction of smooth flux surfaces formed by the field lines. These perturbations also render the particle motion, as described by the guiding center dynamics, non-integrable and, therefore, chaotic. However, the chaoticities of the magnetic field lines and the particle orbits significantly differ both in strength and radial location in a toroidal configuration, except for the case of very low-energy particles whose orbits closely follow the magnetic field lines. The chaoticity of more energetic particles, undergoing large drifts with respect to the magnetic field lines, crucially determines the confinement properties of a toroidal device but cannot be inferred from that of the underlying magnetic field. In this work, we implement the Smaller ALignment Index (SALI) method for detecting and quantifying chaos, allowing for a systematic comparison between magnetic and kinetic chaos. The efficient quantification of chaos enables the assignment of a value characterizing the chaoticity of each orbit in the space of the three constants of the motion, namely energy, magnetic moment and toroidal momentum. The respective diagrams provide a unique overview of the different effects of a specific set of perturbations on the entire range of trapped and passing particles, as well as the radial location of the chaotic regions, offering a valuable tool for the study of particle energy and momentum transport and confinement properties of a toroidal fusion device.
description: 28 pages, 7 figures
Two Problems on Cartan Domains
Creators: name: Yin, Weiping
Publisher: name: arXiv
Year: 2006
Subjects: subject: Complex Variables (math.CV)
subject: FOS: Mathematics
subject: 32A07

description: Firstly, we consider the unitary geometry of two exceptional Cartan domains $\Re_{V}(16)$ and $\Re_{VI}(27)$. We obtain the explicit formulas of Bergman kernal funtion, Cauchy-Szegö kernel, Poinsson kernel and Bergman metric for $\Re_{V}(16)$ and $\Re_{VI}(27)$. Secondly, we give a class of invariant differential operators for Cartan domain $\Re$ of dimension n: If the Bergman metric of $\Re$ is $$ds^{2}=\sum\limits_{i,j=1}^{n}g_{ij}dz_{i}d\bar{z}_{j}, T(z,\bar{z})=(g_{ij})$$ and $$L(u)=T^{-1}(z,\bar{z}) [\frac{\partial^2u}{\partial z_i\partial\bar{z}_j}],$$then $$L_j(u)=\{\mbox {The sum of all prinipal minors of degree} j {for} L(u)\}$$ is invariant under the biholomorphic mapping of $\Re$. Let $D$ be the irreducible bounded homogeneous domain in $C^n$, $P=P(z,*)$ the Poisson kernel of $D$, then for any fixed $J(1\leq j \leq n)$ one has $L_j(P^{1/j})=0$ iff $D$ is a symmetric domain.
description: 11 pages
Bergenia crassifolia Fritsch
Creators: name: Jarvis, Charlie
Publisher: name: Linnaean Society of London in association with the Natural History Museum
Year: 2007
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Saxifragales
Saxifragaceae
Bergenia
Bergenia crassifolia

description: Saxifraga crassifolia Linnaeus, Species Plantarum 1: 401. 1753.
"Habitat in Alpibus Sibiriae." RCN: 3149.
 Lectotype (Yeo in Kew Bull. 20: 118. 1966): Herb. Linn. No. 575.16 (LINN).
 Current name:  Bergenia crassifolia  (L.) Fritsch (Saxifragaceae).
 Note: See additional notes by Webb (in Bot. J. Linn. Soc. 95: 262. 1987).
description: Published as part of Jarvis, Charlie, 2007, Chapter 7: Linnaean Plant Names and their Types (part S), pp. 806-877 in Order out of Chaos. Linnaean Plant Types and their Types, London :Linnaean Society of London in association with the Natural History Museum on page 820, DOI: 10.5281/zenodo.291971
A mid-infrared study of very low mass stars and brown dwarfs in Upper Scorpius
Creators: name: Bouy, Herve
name: Huelamo, Nuria
name: Martin, Eduardo L.
name: Navascues, David Barrado y
name: Sterzik, Michael
name: Pantin, Eric
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We report the results of mid-IR observations with VISIR at the VLT of 10 ultracool dwarfs members of the nearby Upper Scorpius OB association in four filters ranging between 8.59 (PAH1) to 12.8 $μ$m (Ne II), and one brown dwarf with Spitzer between 3.6 and 24 $μ$m. Seven of our targets are detected in at least one of the bands, and we derive upper limits on the fluxes of the remaining 4. These results combined with previous studies from the literature lead to an improved disk frequency of 50$\pm$12%. This frequency is significantly higher than that of accretors (16.3%$\pm$6.2%). Only one object showing mid-IR excess also has H$α$ emission at a level indicating that it must be accreting. Four of the detected targets are multiple system candidates. The observed disk frequency for sub-stellar objects in the Upper Scorpius association is similar to that of stars, consistent with a common formation scenario. It is also similar to the disk fractions observed in younger clusters, suggesting that the disk lifetimes might be longer for ultracool dwarfs than for higher-mass stars.
description: 10 pages, 4 figures, accepted for A&A
Role of the edge electric field in the resonant mode-particle interactions and the formation of transport barriers in toroidal plasmas
Creators: name: Anastassiou, Giorgos
name: Zestanakis, Panagiotis
name: Antonenas, Yannis
name: Viezzer, Eleonora
name: Kominis, Yannis
Publisher: name: arXiv
Year: 2023
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: The impact of an edge radial electric field on the particle orbits and the orbital spectrum in an axisymmetric toroidal magnetic equilibrium is investigated using a guiding center canonical formalism. Poloidal and bounce/transit-averaged toroidal precession frequencies are calculated, highlighting the role of the radial electric field. The radial electric field is shown to drastically modify the resonance conditions between particles with certain kinetic characteristics and specific perturbative non-axisymmetric modes and to enable the formation of transport barriers. The locations of the resonances and the transport barriers, that determine the particle, energy and momentum transport are shown to be accurately pinpointed in the phase space, by employing the calculated orbital frequencies.
description: 23 pages, 8 figures
Large $h\to b s$ in generic two-Higgs-doublet models
Creators: name: Crivellin, Andreas
name: Heeck, Julian
name: Mueller, Dario
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We investigate the possible size of $h\to bs$ in two-Higgs-doublet models with generic Yukawa couplings. Even though the corresponding rates are in general expected to be small due to the indirect constraints from $B_s\toμ^{+}μ^{-}$ and $B_s$--$\overline{B}_s$ mixing, we find regions in parameter space where $h\to bs$ can have a sizable branching ratio well above 10\%. This requires a tuning of the neutral scalar masses and their couplings to muons, but then all additional constraints such as $B\to X_s γ$, $(g-2)_μ$, and $h\toμ^{+}μ^{-}$ are satisfied. In this case, $h\to bs$ can be a relevant background in $h\to b\bar{b}$ searches and vice versa due to the imperfect $b$-tagging purity. Furthermore, if $h\to bs$ is sizeable, one expects two more scalar resonances in the proximity of $m_h$. We briefly comment on other flavour violating Higgs decays and on the 95 GeV $γγ$ resonance within generic two-Higgs-doublet models.
description: 12 pages, 4 figures, 2 tables, version accepted for publication in PRD
Fontan hemodynamics: importance of pulmonary artery diameter.
Creators: name: Dasi, Lakshmi P.
name: Krishnankutty, Resmi
name: Hiroumi D. Kitajima
name: Pekkan, Kerem
name: Kartik S. Sundareswaran
name: Fogel, Mark A.
name: Sharma, Shiva
name: Whitehead, Kevin
name: Yoganathan, Ajit P
Publisher: name: Carnegie Mellon University
Year: 2009
Subjects: subject: 90399 Biomedical Engineering not elsewhere classified
subject: FOS: Medical engineering

description: OBJECTIVE: We quantify the geometric and hemodynamic characteristics of extracardiac and lateral tunnel Fontan surgical options and correlate certain anatomic characteristics with their hemodynamic efficiency and patient cardiac index. METHODS AND RESULTS: The study was conducted retrospectively on 22 patients undergoing Fontan operations (11 extracardiac and 11 lateral tunnel operations). Total cavopulmonary connection geometric parameters such as vessel areas, curvature, and offsets were quantified using a skeletonization method. Energy loss at the total cavopulmonary connection junction was available from previous in vitro experiments and computational fluid dynamic simulations for 5 and 9 patients, respectively. Cardiac index data were available for all patients. There was no significant difference in the mean and minimum cross-sectional vessel areas of the pulmonary artery between the extracardiac and lateral tunnel groups. The indexed energy dissipation within the total cavopulmonary connection was strongly correlated to minimum cross-sectional area of the pulmonary arteries (R(2) value of 0.90 and P < .0002), whereas all other geometric features, including shape characteristics, had no significant correlation. Finally, cardiac index significantly correlated with the minimum pulmonary artery area (P = .006), suggesting that total cavopulmonary connection energy losses significantly affect resting cardiac output. CONCLUSIONS: The minimum outlet size of the total cavopulmonary connection (ie, minimum cross section of pulmonary artery) governs the energy loss characteristics of the total cavopulmonary connection more strongly than variations in the shapes corresponding to extracardiac and lateral tunnel configurations. Differences in pulmonary artery sizes must be accounted for when comparing energy losses between extracardiac and lateral tunnel geometries.
Revista de Ciências da Computação, Vol 4 (2009)
Creators: name: Revista De Ciências Da Computação
Publisher: name: Revista de Ciências da Computação
Year: 2018

description: Editorial 4 Emerging Digital Media, Games and Simulations: A Challenge for Open and Distance Learning...1-15 InqExpert: uma aplicação para tratamento textual das Inquirições de 1258...16-31 Web Design: uma reflexão conceptual...32-46 MICEP - A Methodology for Digital Business in SME...47-54 Videoconferência na RCTS...55-62 Tecnologias de Informação: provocações e contradições...63-72
MPEC 2024-U164 : 2024 UB5
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2024
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469
subject: 2024 UB5

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Kinetic mechanism for reversible structural transition in MoTe2 induced by excess charge carriers
Creators: name: Rubel, O.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Kinetic of a reversible structural transition between insulating (2H) and metallic (1T') phases in a monolayer MoTe2 due to an electrostatic doping is studied using first-principle calculations. The driving force for the structural transition is the energy gained by transferring excess electrons from the bottom of the conduction band to lower energy gapless states in the metallic phase as have been noticed in earlier studies. The corresponding structural transformation involves dissociation of Mo-Te bonds (one per formula unit), which results in a kinetic energy barrier of 0.83 eV. The transformation involves a consecutive movement of atoms similar to a domain wall motion. The presence of excess charge carriers modifies not only the total energy of the initial and final states, but also lowers an energy of the transition state. An experimentally observed hysteresis in the switching process can be attributed to changes in the kinetic energy barrier due to its dependence on the excess carrier density.
description: 5 pages, 5 figures, 1 supplementary information file
Large angle hadron correlations from medium-induced gluon radiation
Creators: name: Vitev, Ivan
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Final state medium-induced gluon radiation in ultradense nuclear matter is shown to favor large angle emission when compared to vacuum bremsstrahlung due to the suppression of collinear gluons. In a simple model of momentum transfers from the medium to the jet+gluon system the phase space distribution of non-Abelian bremsstrahlung is examined to first order in opacity. Perturbative expression for the contribution of the hadronic fragments from medium-induced gluons to the back-to-back particle correlations is derived. It is found that in the limit of large jet energy loss gluon radiation determines the yield and angular distribution of $|Δϕ| \geq \fracπ{2}$ di-hadrons to high transverse momenta $p_{T_2}$ of the associated particles. Clear transition from enhancement to suppression of the away-side di-hadron correlations is established at moderate $p_{T_2}$ and its experimentally accessible features are predicted versus the trigger particle momentum $p_{T_1}$. The measured away-side correlation function is shown to be sensitive to the broad rapidity distribution of di-jets and their vacuum and medium-induced acoplanarity.
description: To appear in the proceedings of the MIT workshop "Correlations and Fluctuations 2005". 10 pages, 5 eps figures
Fontan conversion templates: patient-specific hemodynamic performance of the lateral tunnel versus the intraatrial conduit with fenestration.
Creators: name: Hong, Haifa
name: Dur, Onur
name: Haibo  Zhang
name: Zhongqun  Zhu
name: Pekkan, Kerem
name: Jinfen  Liu
Publisher: name: Carnegie Mellon University
Year: 2013
Subjects: subject: 90399 Biomedical Engineering not elsewhere classified
subject: FOS: Medical engineering

description: Intraatrial-conduit Fontan is considered a modification of both extracardiac and lateral-tunnel Fontan. In this study, the patient-specific hemodynamic performance of intraatrial-conduit and lateral-tunnel Fontan with fenestration, considered as conversion templates, was investigated based on the authors' patient cohort. Pulsatile computational fluid dynamics simulations were performed using patient-specific models of intraatrial-conduit and lateral-tunnel Fontan patients. Real-time "simultaneous" inferior and superior vena cava, pulmonary artery, and fenestration flow waveforms were acquired from ultrasound. Multiple hemodynamic performance indices were investigated, with particular focus on evaluation of the pulsatile flow performance. Power loss inside the lateral-tunnel Fontan appeared to be significantly higher than with the intraatrial-conduit Fontan for patient-specific cardiac output and normalized connection size. Inclusion of the 4-mm fenestration at a 0.24 L/min mean flow resulted in a lower cavopulmonary pressure gradient and less time-averaged power loss for both Fontan connections. Flow structures within the intraatrial conduit were notability more uniform than within the lateral tunnel. Hepatic flow majorly favored the left lung in both surgical connections: conversion from lateral-tunnel to intraatrial-conduit Fontan resulted in better hemodynamics with less power loss, a lower pressure gradient, and fewer stagnant flow zones along the conduit. This patient-specific computational case study demonstrated superior hemodynamics of intraatrial-conduit Fontan over those of lateral-tunnel Fontan with or without fenestration and improved performance after conversion of the lateral tunnel to the intraatrial conduit. The geometry-specific effect of the nonuniform hepatic flow distribution may motivate new rationales for the surgical design.
The HARPS search for southern extra-solar planets. IX. mu Ara, a system with four planets
Creators: name: Pepe, F.
name: Correia, A. C. M.
name: Mayor, M.
name: Tamuz, O.
name: Benz, W.
name: Bertaux, J. -L.
name: Bouchy, F.
name: Couetdic, J.
name: Laskar, J.
name: Lovis, C.
name: Naef, D.
name: Queloz, D.
name: Santos, N. C.
name: Sivan, J. -P.
name: Sosnowska, D.
name: Udry, S.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The mu Ara planetary system is rather complex: It contains two already known planets, mu Ara b with P=640 days and mu Ara c with P=9.64 days, and a third companion on a wide but still poorly defined orbit. Even with three planets in the system, the data points keep anomalously high dispersion around the fitted solution. The high residuals are only partially due to the strong p-mode oscillations of the host star. We have therefore studied in this paper the possible presence of a fourth planet in the system. During the past years we have carried out additional and extremely precise radial-velocity measurements with the HARPS spectrograph. We provide in this paper a full orbital solution of the planetary system around mu Ara. It turns out to be the second system known to harbor 4 planetary companions. Thanks to the new data points acquired with HARPS we can confirm the presence of mu Ara c at P=9.64 days, which produces a coherent RV signal over more than two years. The new orbital fit sets the mass of mu Ara c to 10.5 M_Earth. Furthermore, we present the discovery of mu Ara d, a new planet on an almost circular 310 days-period and with a mass of 0.52 M_Jup. Finally, we give completely new orbital parameters for the longest-period planet, mu Ara e. It is the first time that this companion is constrained by radial-velocity data into a dynamical stable orbit, which leaves no doubt about its planetary nature. (Abridged).
description: 11 pages, 8 low-resolution figures. Submitted to A&A on August 5, 2006
Revista de Ciências da Computação, Vol 5 (2010)
Creators: name: Revista De Ciências Da Computação
Publisher: name: Revista de Ciências da Computação
Year: 2018

description: Editorial 5 Estabilidade de uma Estrutura de Agrupamento – Segmentos de Clientes de uma Instituição Cultural PROLOG-CC: Um Sistema Pericial Difuso Aplicado à Ciência do Solo Problema de planeamento do projeto para biblioteca de desenvolvimento de software - PSPSWDLIB Tomo-GPU: Um Ambiente de Resolução de Problemas Destinado à Análise de Dados Tomográficos Relativos à Caracterização Estrutural de Materiais Economia Computacional: Comportamento Racional e Complexidade
Francois van Brock
Creators: name: Project Team, Their Finest Hour
Publisher: name: University of Oxford
Year: 2024
Subjects: classificationCode: 430304
subject: British history
classificationCode: 430308
subject: European history (excl. British, classical Greek and Roman)
classificationCode: 430316
subject: International history

description: The attached account details the life of Francois van Brock, born in Paris in 1921 to Jacques and Helen van Brock. Raised in a multilingual household, he navigated wartime challenges, including serving in the French army and aiding the resistance. He escaped occupied France and served with the Free French Forces.
Fast matrix multiplication is stable
Creators: name: Demmel, James
name: Dumitriu, Ioana
name: Holtz, Olga
name: Kleinberg, Robert
Publisher: name: arXiv
Year: 2006
Subjects: subject: Numerical Analysis (math.NA)
subject: Computational Complexity (cs.CC)
subject: Data Structures and Algorithms (cs.DS)
subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences
subject: 65Y20, 65F30, 65G50, 68Q17, 68W40, 20C05, 20K01, 16S34, 43A30, 65T50

description: We perform forward error analysis for a large class of recursive matrix multiplication algorithms in the spirit of [D. Bini and G. Lotti, Stability of fast algorithms for matrix multiplication, Numer. Math. 36 (1980), 63--72]. As a consequence of our analysis, we show that the exponent of matrix multiplication (the optimal running time) can be achieved by numerically stable algorithms. We also show that new group-theoretic algorithms proposed in [H. Cohn, and C. Umans, A group-theoretic approach to fast matrix multiplication, FOCS 2003, 438--449] and [H. Cohn, R. Kleinberg, B. Szegedy and C. Umans, Group-theoretic algorithms for matrix multiplication, FOCS 2005, 379--388] are all included in the class of algorithms to which our analysis applies, and are therefore numerically stable. We perform detailed error analysis for three specific fast group-theoretic algorithms.
description: 19 pages; final version, expanded and updated to reflect referees' remarks; to appear in Numerische Mathematik