cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
About curvature, conformal metrics and warped products
Creators: name: Dobarro, Fernando
name: Unal, Bulent
Publisher: name: arXiv
Year: 2007
Subjects: subject: Differential Geometry (math.DG)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 53C21,53C25,53C50

description: We consider the curvature of a family of warped products of two pseduo-Riemannian manifolds $(B,g_B)$ and $(F,g_F)$ furnished with metrics of the form $c^{2}g_B \oplus w^2 g_F$ and, in particular, of the type $w^{2 μ}g_B \oplus w^2 g_F$, where $c, w \colon B \to (0,\infty)$ are smooth functions and $μ$ is a real parameter. We obtain suitable expressions for the Ricci tensor and scalar curvature of such products that allow us to establish results about the existence of Einstein or constant scalar curvature structures in these categories. If $(B,g_B)$ is Riemannian, the latter question involves nonlinear elliptic partial differential equations with concave-convex nonlinearities and singular partial differential equations of the Lichnerowicz-York type among others.
description: 32 pages, 3 figures
The local structure of conformally symmetric manifolds
Creators: name: Derdzinski, Andrzej
name: Roter, Witold
Publisher: name: arXiv
Year: 2007
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 53B30

description: This is a final step in a local classification of pseudo-Riemannian manifolds with parallel Weyl tensor that are not conformally flat or locally symmetric.
description: 12 pages
Investigation of Colour Reconnection in WW Events with the DELPHI detector at LEP-2
Creators: name: The DELPHI Collaboration
name: Abdallah, J.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: In the reaction e+e- -> WW -> (q_1 qbar_2)(q_3 qbar_4) the usual hadronization models treat the colour singlets q_1 qbar_2 and q_3 qbar_4 coming from two W bosons independently. However, since the final state partons may coexist in space and time, cross-talk between the two evolving hadronic systems may be possible during fragmentation through soft gluon exchange. This effect is known as Colour Reconnection. In this article the results of the investigation of Colour Reconnection effects in fully hadronic decays of W pairs in DELPHI at LEP are presented. Two complementary analyses were performed, studying the particle flow between jets and W mass estimators, with negligible correlation between them, and the results were combined and compared to models. In the framework of the SK-I model, the value for its kappa parameter most compatible with the data was found to be: kappa_{SK-I} = 2.2^{+2.5}_{-1.3} corresponding to the probability of reconnection P_{reco} to be in the range 0.31 < P_{reco} < 0.68 at 68% confidence level with its best value at 0.52.
description: 39 pages, 18 figures, Accepted by Eur. Phys. J. C
DESENVOLVIMENTO DE HABILIDADES E COMPETÊNCIAS PARA A PRÁTICA CONTÁBIL: UMA PESQUISA EMPÍRICA NUMA INSTITUIÇÃO PÚBLICA BRASILEIRA
Creators: name: Castro, Rita De Cassia Silva
name: Echternacht, Tiago Henrique De Souza
name: Brito, Carlos Alberto De Oliveira
Publisher: name: Revista de Informação Contábil
Year: 2009
Subjects: Globalização, Contabilidade, Educação Contábil, Habilidades, Conhecimento.

description: A educação contábil vem reunindo esforços para adequar-se às constantes mudanças do mercado global. Nessa perspectiva, alguns organismos internacionais vêm promovendo discussões acerca dos conhecimentos e habilidades necessários ao profissional. Este artigo avalia o nível de desenvolvimento de algumas habilidades e conhecimentos dos alunos do curso de ciências contábeis. Para tanto, aplicou-se um questionário aos alunos de uma IES pública do Nordeste brasileiro. O estudo revela que o desenvolvimento de habilidades, competências e conhecimentos necessárias a prática contábil desses alunos ainda não se encontra num nível satisfatório. Com efeito, a pesquisa visa instigar os responsáveis a repensar continuamente a formação do profissional contábil no Brasil.
description: Revista de Informação Contábil, v. 3, n. 2 (2009): RIC/UFPE - Revista de Informação Contábil
Quantization of massive scalar fields over static black string backgrounds
Creators: name: Piedra, Owen Pavel Fernandez
name: de Oca, Alejandro Cabo Montes
Publisher: name: arXiv
Year: 2007
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The renormalized mean value of the corresponding components of the Energy-Momentum tensor for massive scalar fields coupled to an arbitrary gravitational field configuration having cylindrical symmetry are analytically evaluated using the Schwinger-DeWitt approximation, up to second order in the inverse mass value. The general results are employed to explicitly derive compact analytical expressions for the Energy-Momentum tensor in the particular background of the Black-String spacetime. In the case of the Black String considered in this work, we proof that a violation of the weak energy condition occur at the horizon of the space-time for values of the coupling constant, that include as particular cases the most interesting of minimal and conformal coupling.
description: 4 pages
Evolutionary Neural Gas (ENG): A Model of Self Organizing Network from Input Categorization
Creators: name: Licata, Ignazio
name: Lella, Luigi
Publisher: name: arXiv
Year: 2007
Subjects: subject: General Physics (physics.gen-ph)
subject: Populations and Evolution (q-bio.PE)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: Despite their claimed biological plausibility, most self organizing networks have strict topological constraints and consequently they cannot take into account a wide range of external stimuli. Furthermore their evolution is conditioned by deterministic laws which often are not correlated with the structural parameters and the global status of the network, as it should happen in a real biological system. In nature the environmental inputs are noise affected and fuzzy. Which thing sets the problem to investigate the possibility of emergent behaviour in a not strictly constrained net and subjected to different inputs. It is here presented a new model of Evolutionary Neural Gas (ENG) with any topological constraints, trained by probabilistic laws depending on the local distortion errors and the network dimension. The network is considered as a population of nodes that coexist in an ecosystem sharing local and global resources. Those particular features allow the network to quickly adapt to the environment, according to its dimensions. The ENG model analysis shows that the net evolves as a scale-free graph, and justifies in a deeply physical sense- the term gas here used.
description: 16 pages, 8 figures
BEHAVIORAL FINANCE: UM ESTUDO SOBRE A CORRELAÇÃO ENTRE A HEURÍSTICA DA ANCORAGEM E A TOMADA DE DECISÃO SOB RISCO EM INVESTIMENTOS
Creators: name: Reina, Donizete
name: Dorow, Anderson
name: Junior, Jurandir Sell Macedo
name: Reina, Diane Rossi Maximiano
name: Nunes, Patricia
Publisher: name: Revista de Informação Contábil
Year: 2009
Subjects: Ancoragem. Tomada de Decisão sob Risco. Finanças Comportamentais

description: As Finanças Comportamentais, com base em estudos empíricos, procuram demonstrar que os investidores nem sempre se mantém racionais ao tomarem decisões que envolvem risco. Esse estudo objetivou verificar se a heurística da ancoragem e a tomada de decisão sob risco "decision making under risk" em investimentos reais se correlacionam. Esta pesquisa possui uma abordagem predominantemente quantitativa e analítica. Foram selecionados aleatoriamente vinte e cinco corretores de imóveis profissionais, estabelecidos em três cidades do norte de Santa Catarina, para compor a amostra da pesquisa. Os resultados encontrados mostram que há uma correlação negativa estatisticamente significativa entre ancoragem e tomada de decisão, ou seja, quem avaliou o imóvel abaixo do valor previamente estipulado – R$ 280.000,00 optou por comprar o imóvel. Esse resultado exprime uma correlação robusta em um nível de significância de p
description: Revista de Informação Contábil, v. 3, n. 2 (2009): RIC/UFPE - Revista de Informação Contábil
X-ray Dichroism and the Pseudogap Phase of Cuprates
Creators: name: Di Matteo, S.
name: Norman, M. R.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: A recent polarized x-ray absorption experiment on the high temperature cuprate superconductor Bi2Sr2CaCu2O8 indicates the presence of broken parity symmetry below the temperature, T*, where a pseudogap appears in photoemission. We critically analyze the x-ray data, and conclude that a parity-breaking signal of the kind suggested is unlikely based on the crystal structures reported in the literature. Possible other origins of the observed dichroism signal are discussed. We propose x-ray scattering experiments that can be done in order to determine whether such alternative interpretations are valid or not.
description: final version to be published in Phys Rev B: some calculational details added, clarification of XNLD contamination and biaxiality, more discussion on possible space groups and previous optics results
Vacuum polarization of massive spinor fields in static black-string backgrounds
Creators: name: Piedra, Owen Pavel Fernandez
name: de Oca, Alejandro Cabo Montes
Publisher: name: arXiv
Year: 2007
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The renormalized mean value of the quantum Lagrangian and the corresponding components of the Energy-Momentum tensor for massive spinor fields coupled to an arbitrary gravitational field configuration having cylindrical symmetry are analytically evaluated using the Schwinger-DeWitt approximation, up to second order in the inverse mass value. The general results are employed to explicitly derive compact analytical expressions for the quantum mean Lagrangian and Energy- Momentum tensor in the particular background of the Black-String space-time.
description: 15 pages, few corrections are done in this version
Additional file 1 of Exosomes secreted by endothelial cells derived from human induced pluripotent stem cells improve recovery from myocardial infarction in mice
Creators: name: Li, Hao
name: Wang, Lu
name: Ma, Teng
name: Liu, Zhongmin
name: Gao, Ling
Publisher: name: figshare
Year: 2023
Subjects: subject: Biophysics
subject: Biochemistry
subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Physiology
subject: Pharmacology
subject: Biological Sciences not elsewhere classified
subject: Cancer

description: Additional file 1. Supplementary figures.
Adiabatic elimination in quantum stochastic models
Creators: name: Bouten, Luc
name: Silberfarb, Andrew
Publisher: name: arXiv
Year: 2007
Subjects: subject: Mathematical Physics (math-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We consider a physical system with a coupling to bosonic reservoirs via a quantum stochastic differential equation. We study the limit of this model as the coupling strength tends to infinity. We show that in this limit the solution to the quantum stochastic differential equation converges strongly to the solution of a limit quantum stochastic differential equation. In the limiting dynamics the excited states are removed and the ground states couple directly to the reservoirs.
description: 17 pages, no figures, corrected mistakes
Excited States From State Specific Orbital Optimized Pair Coupled Cluster
Creators: name: Kossoski, Fábris
name: Marie, Antoine
name: Scemama, Anthony
name: Caffarel, Michel
name: Loos, Pierre-François
Publisher: name: arXiv
Year: 2021
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: The pair coupled cluster doubles (pCCD) method (where the excitation manifold is restricted to electron pairs) has a series of interesting features. Among others, it provides ground-state energies very close to what is obtained with doubly-occupied configuration interaction (DOCI), but with polynomial cost (compared with the exponential cost of the latter). Here, we address whether this similarity holds for excited states, by exploring the symmetric dissociation of the linear \ce{H4} molecule. When ground-state Hartree-Fock (HF) orbitals are employed, pCCD and DOCI excited-state energies do not match, a feature that is assigned to the poor HF reference. In contrast, by optimizing the orbitals at the pCCD level (oo-pCCD) specifically for each excited state, the discrepancies between pCCD and DOCI decrease by one or two orders of magnitude. Therefore, the pCCD and DOCI methodologies still provide comparable energies for excited states, but only if suitable, state-specific orbitals are adopted. We also assessed whether a pCCD approach could be used to directly target doubly-excited states, without having to resort to the equation-of-motion (EOM) formalism. In our $Δ$oo-pCCD model, excitation energies were extracted from the energy difference between separate oo-pCCD calculations for the ground state and the targeted excited state. For a set comprising the doubly-excited states of \ce{CH+}, \ce{BH}, nitroxyl, nitrosomethane, and formaldehyde, we found that $Δ$oo-pCCD provides quite accurate excitation energies, with root mean square deviations (with respect to full configuration interaction results) lower than CC3 and comparable to EOM-CCSDT, two methods with much higher computational cost.
description: 12 pages, 4 figures
D-\bar D mixing and rare D decays in the Littlest Higgs model with non-unitarity matrix
Creators: name: Chen, Chuan-Hung
name: Geng, Chao-Qiang
name: Yuan, Tzu-Chiang
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We study the $D-\bar D$ mixing and rare D decays in the Littlest Higgs model. As the new weak singlet quark with the electric charge of 2/3 is introduced to cancel the quadratic divergence induced by the top-quark, the standard unitary $3\times 3$ Cabibbo-Kobayashi-Maskawa matrix is extended to a non-unitary $4\times 3$ matrix in the quark charged currents and Z-mediated flavor changing neutral currents are generated at tree level. In this model, we show that the $D-\bar D$ mixing parameter can be as large as the current experimental value and the decay branching ratio (BR) of $D\to X_u \ga$ is small but its direct CP asymmetry could be $O(10%)$. In addition, we find that the BRs of $D\to X_u \ell^{+} \ell^{-}$, $D\to X_uν\bar ν$ and $D\to μ^{+} μ^{-}$ could be enhanced to be $O(10^{-9})$, $O(10^{-8})$ and $O(10^{-9})$, respectively.
description: 18 pages, 6 figures, references added and updated, version to appear in Phys. Lett. B
Dementia and Memory Institutions
Creators: name: Barratt, Nick
Publisher: name: Zenodo
Year: 2019

description: A thought piece exploring the potential for research libraries to contribute to wider societal infrastructure – physical and digital – to support people living with dementia, drawing on case studies from the UK. The paper extends beyond the HE research library community, but shows how LIBER organisations might deliver meaningful community outreach, engagement and impact whilst fulfilling their wider academic mission.
ANÁLISE INTEGRADA DE INDICADORES EM TRÊS DIMENSÕES: UM CASO DE MOMENTUM APLICADO A UMA EMPRESA BRASILEIRA
Creators: name: Ferreira, Aracéli Cristina Sousa
name: Silva, Márcia Castro
name: Morais, Macelly O.
name: Santos, Rodrigo Rodrigues
Publisher: name: Revista de Informação Contábil
Year: 2009
Subjects: Contabilidade; controladoria; momentum accounting

description: Dado que a Contabilidade não satisfaz plenamente a todos os seus usuários, há uma constante busca pelo seu aprimoramento. Com esse objetivo e convencido de que seria possível determinar as mudanças ocorridas no patrimônio em um determinado momento, Yuji Ijiri, em seu trabalho “Triple-Entry Bookkeeping and Income Momentum“, de 1982, apresentou a Teoria Multidimensional, onde teríamos além do débito e crédito, o trébito. Para Ijiri, as práticas contábeis são falhas à medida que utilizam dados passados para estabelecer uma estratégia futura e o método de partidas dobradas foi desenvolvido para apresentar as mudanças no capital a partir de dados históricos e não para o futuro. Essa Teoria despertou o interesse de alguns autores, entre eles Eric Melse, cujo artigo “Accounting in three dimensions: a case for momentum” de 2004 mostra um exemplo de uma análise integrada utilizando a Teoria Multidimensional. Ele argumenta que existe uma estrutura dinâmica entre os itens do balanço patrimonial, que apontam para o fato de que as três dimensões de contabilização formam um modelo integrado de negócios dinâmicos. O objetivo deste artigo é revisitar a proposta de Ijiri aplicando em uma empresa brasileira, a VALE, a análise integrada aplicada por Melse de modo a verificar se, após mais de 20 anos da publicação das idéias originais, a teoria se apresenta atual.
description: Revista de Informação Contábil, v. 3, n. 2 (2009): RIC/UFPE - Revista de Informação Contábil
Dipolar Bose-Einstein condensates at Finite temperature
Creators: name: Ronen, Shai
name: Bohn, John
Publisher: name: arXiv
Year: 2007
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We study a Bose-Einstein condensate (BEC) of a dilute gas with dipolar interactions, at finite temperature, using the Hartree-Fock-Bogoliubov (HFB) theory within the Popov approximation. An additional approximation involving the dipolar exchange interaction is made to facilitate the computation. We calculate the temperature dependence of the condensate fraction of a condensate confined in a cylindrically symmetric harmonic trap. We show that the bi-concave shaped condensates found in Ref. \cite{Ronen07} in certain pancake traps at zero temperature, are also stable at finite temperature. Surprisingly, the dip in the central density of these structured condensates is actually enhanced at low finite temperatures. We explain this effect.
description: 9 figures
Alternative Large Nc Schemes and Chiral Dynamics
Creators: name: Sannino, Francesco
name: Schechter, Joseph
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Theory (hep-th)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We compare the dependences on the number of colors of the leading pion pion scattering amplitudes using the single index quark field and two index quark fields. These are seen to have different relationships to the scattering amplitudes suggested by chiral dynamics which can explain the long puzzling pion pion s wave scattering up to about 1 GeV. This may be interesting for getting a better understanding of the large Nc approach as well as for application to recently proposed technicolor models.
description: RevTex, two-columns, 6 pages
Carleson and reverse Carleson measures on homogeneous Siegel domains
Creators: name: Calzi, Mattia
name: Peloso, Marco M.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Complex Variables (math.CV)
subject: FOS: Mathematics
subject: 32A36 (Primary) 32A10, 32M10 (Secondary)

description: In this paper we study Carleson and reverse Carleson measures on holomorphic function spaces on a homogeneous Siegel domain of Type II. We prove several necessary conditions and sufficient conditions in order for a measure $μ$ to be Carleson and reverse Carleson on mixed-normed weighted Bergman spaces.
description: 40 pages, no figures
Trade-offs in learning controllers from noisy data
Creators: name: Bisoffi, Andrea
name: De Persis, Claudio
name: Tesi, Pietro
Publisher: name: arXiv
Year: 2021
Subjects: subject: Systems and Control (eess.SY)
subject: Dynamical Systems (math.DS)
subject: Optimization and Control (math.OC)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Mathematics

description: In data-driven control, a central question is how to handle noisy data. In this work, we consider the problem of designing a stabilizing controller for an unknown linear system using only a finite set of noisy data collected from the system. For this problem, many recent works have considered a disturbance model based on energy-type bounds. Here, we consider an alternative more natural model where the disturbance obeys instantaneous bounds. In this case, the existing approaches, which would convert instantaneous bounds into energy-type bounds, can be overly conservative. In contrast, without any conversion step, simple arguments based on the S-procedure lead to a very effective controller design through a convex program. Specifically, the feasible set of the latter design problem is always larger, and the set of system matrices consistent with data is always smaller and decreases significantly with the number of data points. These findings and some computational aspects are examined in a number of numerical examples.
Incorporation and effects of mesoporous SiO2-CaO nanospheres loaded with ipriflavone on osteoblast/osteoclast cocultures
Creators: name: Casarrubios, Laura
name: Gomez-Cerezo, Natividad
name: Feito, Maria Jose
name: Vallet-Regi, Maria
name: Arcos, Daniel
name: Portoles, Maria Teresa
Publisher: name: arXiv
Year: 2021
Subjects: subject: Tissues and Organs (q-bio.TO)
subject: FOS: Biological sciences

description: Mesoporous nanospheres in the system SiO2-CaO (NanoMBGs) with a hollow core surrounded by a radial arrangement of mesopores were characterized, labeled with FITC (FITC-NanoMBGs) and loaded with ipriflavone (NanoMBG-IPs) in order to evaluate their incorporation and their effects on both osteoblasts and osteoclasts simultaneously and maintaining the communication with each other in coculture. The influence of these nanospheres on macrophage polarization towards pro-inflammatory M1 or reparative M2 phenotypes was also evaluated in basal and stimulated conditions through the expression of CD80 (as M1 marker) and CD206 (as M2 marker) by flow cytometry and confocal microscopy. NanoMBGs did not induce the macrophage polarization towards the M1 pro-inflammatory phenotype, favoring the M2 reparative phenotype and increasing the macrophage response capability against stimuli as LPS and IL-4. NanoMBG-IPs induced a significant decrease of osteoclast proliferation and resorption activity after 7 days in coculture with osteoblasts, without affecting osteoblast proliferation and viability. Drug release test demonstrated that only a fraction of the payload is released by diffusion, whereas the rest of the drug remains within the hollow core after 7 days, thus ensuring the local long-term pharmacological treatment beyond the initial fast IP release. All these data ensure an appropriate immune response to these nanospheres and the potential application of NanoMBG-IPs as local drug delivery system in osteoporotic patients.
description: 40 pages, 8 figures. arXiv admin note: text overlap with arXiv:2103.08552
Additional file 3: of Tumor-derived exosomal HMGB1 fosters hepatocellular carcinoma immune evasion by promoting TIM-1+ regulatory B cell expansion
Creators: name: Ye, Linsen
name: Zhang, Qi
name: Cheng, Yusheng
name: Chen, Xiaolong
name: Wang, Guoying
name: Shi, Mengchen
name: Zhang, Tong
name: Cao, Yingjiao
name: Pan, Hang
name: Zhang, Liting
name: Wang, Genshu
name: Deng, Yinan
name: Yang, Yang
name: Chen, Guihua
Publisher: name: figshare
Year: 2018
Subjects: subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Evolutionary Biology
subject: Immunology
subject: FOS: Clinical medicine
subject: Biological Sciences not elsewhere classified
subject: Developmental Biology
subject: Cancer
subject: Hematology

description: Table S3. Flow cytometry panels for analysis of immune cells. (DOCX 17 kb)
Group sequential designs for cancer immunotherapy trial with delayed treatment effect
Creators: name: Wu, Jianrong
name: Li, Yimei
name: Zhu, Liang
Publisher: name: Taylor & Francis
Year: 2023
Subjects: Biotechnology
Biological Sciences not elsewhere classified
Mathematical Sciences not elsewhere classified
Science Policy

description: Cancer immunotherapy trials are frequently characterized by delayed treatment effects such that the proportional hazards assumption is violated and the log-rank test suffers a substantial loss of statistical power. To increase the efficacy of the trial design, a variety of weighted log-rank tests have been proposed for fixed sample and group sequential trial designs. However, in such a group sequential design, it is often not recommended for futility interim monitoring due to possible delayed treatment effect which could result a high false-negative rate. To resolve this problem, we propose a group sequential design using a piecewise weighted log-rank test which provides an event-driven approach based on number of events after the delayed time. That is, the interim looks will not be conducted until the planned number of events observed after the delay time. Thus, it avoids the possibility of false-negative rate due to the delayed treatment effect. Furthermore, with an event-driven approach, the proposed group sequential design is robust against the underlying survival, accrual and censoring distributions. The group sequential designs using Fleming-Harrington-(ρ,γ) weighted log-rank test and a new weighted log-rank test are also discussed.
Zero-Shot Instance Segmentation
Creators: name: Zheng, Ye
name: Wu, Jiahong
name: Qin, Yongqiang
name: Zhang, Faen
name: Cui, Li
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Deep learning has significantly improved the precision of instance segmentation with abundant labeled data. However, in many areas like medical and manufacturing, collecting sufficient data is extremely hard and labeling this data requires high professional skills. We follow this motivation and propose a new task set named zero-shot instance segmentation (ZSI). In the training phase of ZSI, the model is trained with seen data, while in the testing phase, it is used to segment all seen and unseen instances. We first formulate the ZSI task and propose a method to tackle the challenge, which consists of Zero-shot Detector, Semantic Mask Head, Background Aware RPN and Synchronized Background Strategy. We present a new benchmark for zero-shot instance segmentation based on the MS-COCO dataset. The extensive empirical results in this benchmark show that our method not only surpasses the state-of-the-art results in zero-shot object detection task but also achieves promising performance on ZSI. Our approach will serve as a solid baseline and facilitate future research in zero-shot instance segmentation.
description: 8 pages, 6 figures
Characteristic time of stellar flares on Sun-like stars
Creators: name: Yan, Y.
name: He, H.
name: Li, C.
name: Esamdin, A.
name: Tan, B. L.
name: Zhang, L. Y.
name: Wang, H.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Using the short-cadence data (1-min interval) of the Kepler space telescope, we conducted a statistical analysis for the characteristic time of stellar flares on Sun-like stars (SLS). Akin to solar flares, stellar flares show rise and decay light-curve profiles, which reflect the two distinct phases (rise phase and decay phase) of the flare process. We derived characteristic times of the two phases for the stellar flares of SLS, resulting in a median rise time of about 5.9 min and a median decay time of 22.6 min. It is found that both the rise time and the decay time of the stellar flares follow a lognormal distribution. The peak positions of the lognormal distributions for flare rise time and decay time are 3.5 min and 14.8 min, respectively. These time values for stellar flares are similar to the time-scale of solar flares, which supports the idea that stellar flares and solar flares have the same physical mechanism. The statistical results obtained in this work for SLS can be a benchmark of flare characteristic times when comparing with other types of stars.
description: Published in Monthly Notices of the Royal Astronomical Society: Letters, 5 pages, 2 figures, 2 tables, 3 ancillary files
Benchmarking High Density Image Matching for Oblique Airborne Imagery
Creators: name: Cavegn, Stefan
name: Haala, Norbert
name: Nebiker, Stephan
name: Rothermel, Mathias
name: Tutzauer, Patrick
Publisher: name: Fachhochschule Nordwestschweiz FHNW
Year: 2014
Subjects: Image
Matching
Aerial
Point Cloud
Reference Data
Analysis
Comparison
Accuracy

description: Both, improvements in camera technology and new pixel-wise matching approaches triggered the further development of software tools for image based 3D reconstruction. Meanwhile research groups as well as commercial vendors provide photogrammetric software to generate dense, reliable and accurate 3D point clouds and Digital Surface Models (DSM) from highly overlapping aerial images. In order to evaluate the potential of these algorithms in view of the ongoing software developments, a suitable test bed is provided by the ISPRS/EuroSDR initiative Benchmark on High Density Image Matching for DSM Computation. This paper discusses the proposed test scenario to investigate the potential of dense matching approaches for 3D data capture from oblique airborne imagery. For this purpose, an oblique aerial image block captured at a GSD of 6 cm in the west of Zürich by a Leica RCD30 Oblique Penta camera is used. Within this paper, the potential test scenario is demonstrated using matching results from two software packages, Agisoft PhotoScan and SURE from University of Stuttgart. As oblique images are frequently used for data capture at building facades, 3D point clouds are mainly investigated at such areas. Reference data from terrestrial laser scanning is used to evaluate data quality from dense image matching for several facade patches with respect to accuracy, density and reliability.
Hyper-Invariant MERA: Approximate Holographic Error Correction Codes with Power-Law Correlations
Creators: name: Cao, ChunJun
name: Pollack, Jason
name: Wang, Yixu
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We consider a class of holographic tensor networks that are efficiently contractible variational ansatze, manifestly (approximate) quantum error correction codes, and can support power-law correlation functions. In the case when the network consists of a single type of tensor that also acts as an erasure correction code, we show that it cannot be both locally contractible and sustain power-law correlation functions. Motivated by this no-go theorem, and the desirability of local contractibility for an efficient variational ansatz, we provide guidelines for constructing networks consisting of multiple types of tensors that can support power-law correlation. We also provide an explicit construction of one such network, which approximates the holographic HaPPY pentagon code in the limit where variational parameters are taken to be small.
description: 12 pages plus appendices, 19 figures
Cross-sections of neutron rich nuclei from projectile fragmentation: canonical thermodynamic model estimates
Creators: name: Chaudhuri, G.
name: Gupta, S. Das
name: Lynch, W. G.
name: Mocko, M.
name: Tsang, M. B.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: A remarkably simple dependence of fragmentation cross-section on average binding energy has been established in experimental data. This dependence was empirically parametrised leading to a very useful formula for extrapolation. We find that the canonical thermodynamic model, which has been used in the past for successful computations of many observables resulting from multifragmentation, reproduces the salient fetures of fragmentation cross-sections of very neutron rich nuclei very well. This helps towards a theoretical understanding of the observed data.
description: 10 pages, 4 figures
The height dependence of temperature - velocity correlation in the solar photosphere
Creators: name: Koza, J.
name: Kucera, A.
name: Rybák, J.
name: Wöhl, H.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We derive correlation coefficients between temperature and line-of-sight velocity as a function of optical depth throughout the solar photosphere for the non-magnetic photosphere and a small area of enhanced magnetic activity. The maximum anticorrelation of about -0.6 between temperature and line-of-sight velocity in the non-magnetic photosphere occurs at log tau5 = -0.4. The magnetic field is another decorrelating factor along with 5-min oscillations and seeing.
description: In press,"Modern Solar Facilities - Advanced Solar Science", (Gottingen), Universitatsverlag Gottingen, 139-142, 2007
EFICIÊNCIA NO SISTEMA BANCÁRIO BRASILEIRO: UMA ANÁLISE DO DESEMPENHO DE BANCOS DE VAREJO, ATACADO, MIDDLE-MARKET E FINANCIAMENTO UTILIZANDO DEA
Creators: name: Macedo, Marcelo Alvaro Da Silva
name: Barbosa, Ana Carolina Thomaz De Almeida Monteiro
Publisher: name: Revista de Informação Contábil
Year: 2009
Subjects: Desempenho; Eficiência; Bancos; DEA.

description: Resumo: Este artigo tem como objetivo, a avaliação da eficiência no mercado bancário brasileiro, através de uma análise evolutiva do desempenho (2005-2006), por segmento, dos bancos de Varejo, Financiamento, Middle-Market e Atacado e Negócios. Para tanto, com base nos dados extraídos da Revista Balanço Financeiro de 2007, utilizou-se a metodologia DEA para avaliação do desempenho dos bancos. Os resultados mostraram não haver nenhuma instituição 100% eficiente, o que confirma a necessidade, mesmo que pequenas, de melhoria em todas as variáveis. Além disso, observou-se não existir relação entre eficiência e tamanho nas análises dos segmentos Varejo, Atacado e Negócios e Financiamento. Isso mostra que, nestes ramos, não há vantagem dos bancos de grande porte em relação aos de pequeno, ou seja, que não é o tamanho, mas sim o desempenho que gera a competitividade. Porém, no segmento Middle-Market notou-se uma relação entre tamanho e desempenho, já que os resultados mostram que não há possibilidade de uma instituição de pequeno porte ter alto desempenho neste segmento.
description: Revista de Informação Contábil, v. 3, n. 3 (2009): RIC - Vol. 3 - No. 3 - Jul-Set/2009
A IMPORTÂNCIA DOS DADOS CONTÁBEIS PARA A RELAÇÃO ENTRE CARGA TRIBUTÁRIA, TAMANHO E SETOR ECONÔMICO DAS EMPRESAS BRASILEIRAS
Creators: name: Bispo, Jorge De Souza
name: Calijuri, Mônica Sionara Schpallir
name: Lima, Iran Siqueira
Publisher: name: Revista de Informação Contábil
Year: 2010
Subjects: Custos Políticos, Carga Tributária, Tamanho da Empresa, Setor Econômico

description: O presente trabalho discute a relação entre carga tributária, os setores econômicos e os tamanhos das empresas brasileiras. A discussão parte da sugestão de investigação dos custos políticos; um desses custos é a incidência de impostos, que pode variar em relação ao tamanho e, talvez, em relação ao setor econômico da firma. A carga tributária como custo político certamente irá influenciar e até mesmo definir a escolha de um determinado procedimento contábil. Por meio dos dados contábeis, foram calculadas as cargas tributárias das empresas com capital aberto e que divulgam a Demonstração de Valor Adicionado (DVA). Foi utilizado, para a determinação da carga tributária, o valor adicionado como uma proxy do Produto Interno Bruto. Por meio do teste de médias, foi comprovada a existência de diferenças significativas de cargas tributárias entre os diversos setores econômicos e entre os diversos tamanhos de empresas.
description: Revista de Informação Contábil, v. 3, n. 3 (2009): RIC - Vol. 3 - No. 3 - Jul-Set/2009
GESTÃO DA RESPONSABILIDADE SOCIAL NA MARINHA DO BRASIL: UMA PROPOSTA DE BALANÇO SOCIAL A PARTIR DA VERSÃO DO IBASE
Creators: name: Correa, Paulo André De Barros
name: De Carvalho, Frederico A.
name: Alves, Francisco José Dos Santos
Publisher: name: Revista de Informação Contábil
Year: 2010
Subjects: subject: Balanço Social; Responsabilidade Social; Organização pública - Brasil; Marinha do Brasil.
subject: Balanço Social

description: O balanço social, um relatório de cunho financeiro e social que possibilita a evidenciação dos recursos e das influências recebidas e transmitidas pelas organizações às comunidades com as quais interagem, assume hoje grande relevância para a gestão da responsabilidade social das organizações. No setor público, ambos os temas representam importante potencial de pesquisa para os estudos contábeis. Este trabalho apresenta uma primeira aproximação a uma proposta de modelo específico para uma organização pública, a Marinha do Brasil (MB). Partindo de pesquisa bibliográfica, foi escolhido o modelo do IBASE e então realizado um estudo de caso. Os dados foram coletados por meio de entrevistas diretas com dirigentes da Força, sendo a análise essencialmente qualitativa. O principal resultado foi a explicitação e integração de dados hoje existentes nos sistemas de informações da MB, bem como das fontes em que poderão ser obtidos, de modo a estimular a implementação do instrumento proposto.
description: Revista de Informação Contábil, v. 3, n. 3 (2009): RIC - Vol. 3 - No. 3 - Jul-Set/2009
Robust Unsupervised Multi-Object Tracking in Noisy Environments
Creators: name: Yang, C. -H. Huck
name: Chhabra, Mohit
name: Liu, Y. -C.
name: Kong, Quan
name: Yoshinaga, Tomoaki
name: Murakami, Tomokazu
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Artificial Intelligence (cs.AI)
subject: Machine Learning (cs.LG)
subject: Multimedia (cs.MM)
subject: Neural and Evolutionary Computing (cs.NE)
subject: FOS: Computer and information sciences

description: Physical processes, camera movement, and unpredictable environmental conditions like the presence of dust can induce noise and artifacts in video feeds. We observe that popular unsupervised MOT methods are dependent on noise-free inputs. We show that the addition of a small amount of artificial random noise causes a sharp degradation in model performance on benchmark metrics. We resolve this problem by introducing a robust unsupervised multi-object tracking (MOT) model: AttU-Net. The proposed single-head attention model helps limit the negative impact of noise by learning visual representations at different segment scales. AttU-Net shows better unsupervised MOT tracking performance over variational inference-based state-of-the-art baselines. We evaluate our method in the MNIST-MOT and the Atari game video benchmark. We also provide two extended video datasets: ``Kuzushiji-MNIST MOT'' which consists of moving Japanese characters and ``Fashion-MNIST MOT'' to validate the effectiveness of the MOT models.
description: Accepted to IEEE ICIP 2021
Magnetism in the high-Tc analogue Cs2AgF4 studied with muon-spin relaxation
Creators: name: Lancaster, T.
name: Blundell, S. J.
name: Baker, P. J.
name: Hayes, W.
name: Giblin, S. R.
name: McLain, S. E.
name: Pratt, F. L.
name: Salman, Z.
name: Jacobs, E. A.
name: Turner, J. F. C.
name: Barnes, T.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We present the results of a muon-spin relaxation study of the high-Tc analogue material Cs2AgF4. We find unambiguous evidence for magnetic order, intrinsic to the material, below T_C=13.95(3) K. The ratio of inter- to intraplane coupling is estimated to be |J'/J|=1.9 x 10^-2, while fits of the temperature dependence of the order parameter reveal a critical exponent beta=0.292(3), implying an intermediate character between pure two- and three- dimensional magnetism in the critical regime. Above T_C we observe a signal characteristic of dipolar interactions due to linear F-mu-F bonds, allowing the muon stopping sites in this compound to be characterized.
description: 4 pages, 3 figures
Reconciling the X(3872) with the near-threshold enhancement in the D^0\bar{D}^{*0} final state
Creators: name: Hanhart, C.
name: Kalashnikova, Yu. S.
name: Kudryavtsev, A. E.
name: Nefediev, A. V.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We investigate the enhancement in the D^0\bar{D}^0π^0 final state with the mass M=3875.2\pm 0.7^{+0.3}_{-1.6}\pm 0.8 MeV found recently by the Belle Collaboration in the B\to K D^0\bar{D}^0π^0 decay and test the possibility that this is yet another manifestation of the well-established resonance X(3872). We perform a combined Flatte analysis of the data for the D^0\bar{D}^0π^0 mode, and for the π^+π^- J/ψmode of the X(3872). Only if the X(3872) is a virtual state in the D^0\bar{D}^{*0} channel, the data on the new enhancement comply with those on the X(3872). In our fits, the mass distribution in the D^0\bar{D}^{*0} mode exhibits a peak at 2-3 MeV above the D^0\bar{D}^{*0} threshold, with a distinctive non-Breit-Wigner shape.
description: RevTeX4, 17 pages, some references updated and corrected, version published in Phys. Rev. D
I am Definitely Manipulated, Even When I am Aware of it. It s Ridiculous! -- Dark Patterns from the End-User Perspective
Creators: name: Bongard-Blanchy, Kerstin
name: Rossi, Arianna
name: Rivas, Salvador
name: Doublet, Sophie
name: Koenig, Vincent
name: Lenzini, Gabriele
Publisher: name: arXiv
Year: 2021
Subjects: subject: Human-Computer Interaction (cs.HC)
subject: FOS: Computer and information sciences

description: Online services pervasively employ manipulative designs (i.e., dark patterns) to influence users to purchase goods and subscriptions, spend more time on-site, or mindlessly accept the harvesting of their personal data. To protect users from the lure of such designs, we asked: are users aware of the presence of dark patterns? If so, are they able to resist them? By surveying 406 individuals, we found that they are generally aware of the influence that manipulative designs can exert on their online behaviour. However, being aware does not equip users with the ability to oppose such influence. We further find that respondents, especially younger ones, often recognise the "darkness" of certain designs, but remain unsure of the actual harm they may suffer. Finally, we discuss a set of interventions (e.g., bright patterns, design frictions, training games, applications to expedite legal enforcement) in the light of our findings.
description: ACM DIS Conference on Designing interactive systems, June 28 - July 2, 2021, online. ACM, New York, NY, USA
Algebraic structures of multipartite quantum systems
Creators: name: Heydari, Hoshang
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We investigate the relation between multilinear mappings and multipartite states. We show that the isomorphism between multilinear mapping and tensor product completely characterizes decomposable multipartite states in a mathematically well-defined manner.
description: 7 pages
IDENTIFICAÇÃO DO CAPITAL INTELECTUAL NÃO ADQUIRIDO EM ENTIDADES DO TERCEIRO SETOR
Creators: name: Colauto, Romualdo Douglas
name: Avelino, Bruna Camargos
Publisher: name: Revista de Informação Contábil
Year: 2010
Subjects: Capital Intelectual; Entidades sem fins lucrativos; Avaliação.

description: As entidades do Terceiro Setor caracterizam-se como agentes relevantes para o desenvolvimento socioeconômico de uma nação ao proporcionarem a realização dos objetivos da coletividade O rastreamento do processo de desenvolvimento do capital intelectual (CI) envolve variáveis interdependentes que contribuem para a consecução dos objetivos organizacionais. Nesse sentido, o trabalho tem por objetivo identificar a presença de capital intelectual desenvolvido em entidades do Terceiro Setor por meio de informações financeiras e não financeiras. A proposta respalda-se nos modelos teóricos de Stewart (1998), Sveiby (1998), Edvinsson e Malone (1998), Euroforum (1998) e Camisón, Palácios e Devece (1999). Os procedimentos de coleta de dados consubstanciaram-se na aplicação de um questionário junto aos departamentos de recursos humanos, marketing e financeiro de entidades de Belo Horizonte-MG, pertencentes às áreas de Educação e Cultura e Saúde e Assistência Social. A escolha dos setores e das entidades objetivou filtrar um grupo de organizações que realizaram projetos em 2007. Os resultados consistem no mapeamento das ações relacionadas ao desenvolvimento do Capital Humano, Estrutural e de Relacionamentos. Com base nestas ações, propõe-se um conjunto de informações para monitorar os investimentos preconizados no desenvolvimento do CI.
description: Revista de Informação Contábil, v. 3, n. 3 (2009): RIC - Vol. 3 - No. 3 - Jul-Set/2009
Three-dimensional effects in "atom diodes": atom-optical devices for one-way motion
Creators: name: Ruschhaupt, A.
name: Muga, J. G.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The ``atom diode'' is a laser device that lets the ground state atom pass in one direction but not in the opposite direction. We examine three-dimensional effects of that device for arbitrary atomic incidence angles on flat laser sheets and set breakdown limiting angles and velocities. It is found that a correct diodic behavior independent of the incident angle can be obtained with blue detuned lasers.
description: 10 pages, 8 figures
Dynamical $U(1)_R$ Breaking in the Metastable Vacua
Creators: name: Cho, Hae Young
name: Park, Jong-Chul
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In the Intriligator-Seiberg-Shih model, we parametrize spontaneous breaking of $U(1)_R$ symmetry with two gauge singlets with R-charges 1 and --1. These singlets can play the role of the messengers. The messenger scale is dynamically generated, and hence there is no hierarchy problem between the supersymmetry breaking scale and the messenger scale. In the gauge mediation scenario, supersymmetry breaking scale turns out to be around $\mathcal{O}(10^6)\textrm{GeV}$.
description: 1+13pages, 2figures; references added, minor changes, conclusions unchanged; Matches published version
Additional file 4: of Tumor-derived exosomal HMGB1 fosters hepatocellular carcinoma immune evasion by promoting TIM-1+ regulatory B cell expansion
Creators: name: Ye, Linsen
name: Zhang, Qi
name: Cheng, Yusheng
name: Chen, Xiaolong
name: Wang, Guoying
name: Shi, Mengchen
name: Zhang, Tong
name: Cao, Yingjiao
name: Pan, Hang
name: Zhang, Liting
name: Wang, Genshu
name: Deng, Yinan
name: Yang, Yang
name: Chen, Guihua
Publisher: name: figshare
Year: 2018
Subjects: subject: Cell Biology
subject: Molecular Biology
subject: Immunology
subject: FOS: Clinical medicine
subject: Biological Sciences not elsewhere classified
subject: Developmental Biology
subject: Cancer
subject: Hematology

description: Table S4. The antibodies used in our experiments. (DOCX 17 kb)