cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Rings and images of Horndeski hairy black hole illuminated by various thin accretions
Creators: name: Wang, Xi-Jing
name: Kuang, Xiao-Mei
name: Meng, Yuan
name: Wang, Bin
name: Wu, Jian-Pin
Publisher: name: arXiv
Year: 2023
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We analyze the light rays around a static hairy black hole in Horndeski gravity with the use of ray-tracing procedure. We find that a stronger Horndeski hairy parameter corresponds to larger photon sphere as well as critical impact parameter, and wider ranges of photon ring and lensed ring emissions. These influences can be robustly interpreted from the shape of the effective potential of the photon's radial motion. Based on the distribution of the light rays, we then investigate the optical appearances of the Horndeski hairy black hole surrounded by various thin accretions. Firstly, we consider that the Horndeski hairy black hole is illuminated by the optically and geometrically thin accretion disk. We carefully clarify the contributions from the direct, lensed ring and photon ring intensities to the total observed intensity via the transfer function, which is rarely discussed in this scenario. We find that the Horndeski hair has significant influences on both shadow size and distributions of direct, lensed ring and photon ring brightness in three standard emission profiles. As a result, the rings and images of Horndeski hairy black hole and the origination of their brightness differentiate from those of Schwarzschild black hole (SBH). Then, when the Horndeski hairy black hole is illuminated by thin spherical accretions, the hairy black hole's shadow surrounded by a bright ring is larger than that of SBH, but the brightness of ring is fainter. Similar to that of SBH, the size of hairy black hole shadow does not change as the radial moving of the spherical accretion, and the brightness for the infalling accretion is fainter than that for the static accretion due to the Doppler effect. Therefore, we argue that the black hole image consisting of the shadow and accretion construction could, in theory, reflect the observational differences between the Horndeski hairy black hole and SBH.
description: 21 pages, 13 figures, matching the version published in PRD
title: Dynamics of planetary gear trains with consideration of moving force effect and ring flexibility
Creators: name: Abedini Laksar, Mohammad Javad
Publisher: name: Memorial University of Newfoundland
Year: 2023

description: This Ph.D. dissertation focuses on the dynamics of planetary gear trains (PGTs). The direct motivation comes from the wind power industry, where PGT size and load become larger and larger, leading to more complicated dynamic behaviour. The time-varying mesh stiffness in a gear system causes parametric resonances. Additionally, the multiple planet arrangement in a PGT makes the stability more complicated. This dissertation first investigates the instability caused by the time-varying stiffness, with a focus on the instability related to the repeated natural frequencies caused by the multiple planets. The research employs the method of multiple scales, enabling the derivation of an analytical formulation to describe the instability zones. The obtained results are validated against numerical results from Floquet theory. Notably, the research enhances the existing formulation for instability zones by presenting a slightly larger region for the unstable zone compared to what has been reported in earlier literature. To ensure the accuracy of the proposed formulation, the obtained results are validated against the numerical results from Floquet theory. With the growing size and load of PGTs, the ring gear in these systems tends to be designed with a relatively thin wall, which leads to significant deflection when subjected to increased loads. In light of this phenomenon, this dissertation focuses on investigating the free vibration behaviour of the ring gear. Initially, the ring gear is simplified as an elastic ring, and then Euler-Bernoulli and Timoshenko theories are applied based on the ring's thickness. The support is modeled with general elastic boundary conditions to mimic a bolt connection. As a result, the natural frequencies and closed-form mode shapes are derived and analyzed. The obtained results are then compared against Finite Element Method (FEM) results to ensure their validity. In a PGT, the meshing force between the ring gear and planet gear is not stationary. Instead, it moves along the circumference of the ring with the angular speed of the carrier, creating a moving load excitation. The dissertation thoroughly investigates the dynamics of the ring gear subjected to this moving meshing load. By leveraging the obtained mode shapes, the partial differential equation of the ring is transformed into ordinary differential equations, which are solved using the Maple package. Furthermore, the effect of the moving force is analyzed in great detail, and the critical speed that causes resonances is obtained and examined. The results are compared against data from the literature and validated against FEM results.
Effects of tendon compliance on the economy of cyclic contractions
Creators: name: Hume, Alexander Douglas
Publisher: name: Graduate Studies
Year: 2012
Subjects: subject: Animal Physiology
subject: Muscle
subject: energetics

description: The use of compliant tendons to store elastic strain energy and release it during the subsequent cycle lowers the mechanical work output and has been suggested to lower the metabolic energy consumed. In this thesis, I examined and compared the activation conditions, work output and force generation of muscle lifting a load an equal distance in the presence of a compliant and non-compliant tendon, and then replicated those movements and activation within an oxygen chamber to test for the differences in energy consumption. It was found that for a single contraction cycle, a cyclically contracting muscle in series with a compliant tendon did less than half of the shortening and lengthening work, nearly twice the net work, resulted in a reduced impulse, required different activation conditions and consumed 17% less energy than a muscle oscillating a load with a non-compliant tendon, suggesting it is responsible for more economical movement.
Physical Properties of Galaxies from z=2-4
Creators: name: Shapley, Alice E.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The epoch of galaxy assembly from 2<=z<=4 marks a critical stage during the evolution of today's galaxy population. During this period the star-formation activity in the Universe was at its peak level, and the structural patterns observed among galaxies in the local Universe were not yet in place. A variety of novel techniques have been employed over the past decade to assemble multiwavelength observations of galaxies during this important epoch. In this primarily observational review, I present a census of the methods used to find distant galaxies and the empirical constraints on their multiwavelength luminosities and colors. I then discuss what is known about the stellar content and past histories of star formation in high-redshift galaxies; their interstellar contents including dust, gas, and heavy elements; and their structural and dynamical properties. I conclude by considering some of the most pressing and open questions regarding the physics of high-redshift galaxies, which are to be addressed with future facilities.
description: ARA&A Volume 49, in press; 123 pages, 18 figures
Impact-Oriented Contextual Scholar Profiling using Self-Citation Graphs
Creators: name: Luo, Yuankai
name: Shi, Lei
name: Xu, Mufan
name: Ji, Yuwen
name: Xiao, Fengli
name: Hu, Chunming
name: Shan, Zhiguang
Publisher: name: arXiv
Year: 2023
Subjects: subject: Digital Libraries (cs.DL)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: Quantitatively profiling a scholar's scientific impact is important to modern research society. Current practices with bibliometric indicators (e.g., h-index), lists, and networks perform well at scholar ranking, but do not provide structured context for scholar-centric, analytical tasks such as profile reasoning and understanding. This work presents GeneticFlow (GF), a suite of novel graph-based scholar profiles that fulfill three essential requirements: structured-context, scholar-centric, and evolution-rich. We propose a framework to compute GF over large-scale academic data sources with millions of scholars. The framework encompasses a new unsupervised advisor-advisee detection algorithm, a well-engineered citation type classifier using interpretable features, and a fine-tuned graph neural network (GNN) model. Evaluations are conducted on the real-world task of scientific award inference. Experiment outcomes show that the F1 score of best GF profile significantly outperforms alternative methods of impact indicators and bibliometric networks in all the 6 computer science fields considered. Moreover, the core GF profiles, with 63.6%-66.5% nodes and 12.5%-29.9% edges of the full profile, still significantly outrun existing methods in 5 out of 6 fields studied. Visualization of GF profiling result also reveals human explainable patterns for high-impact scholars.
description: KDD 2023
Very Low-Mass Stellar and Substellar Companions to Solar-Like Stars from MARVELS I: A Low Mass Ratio Stellar Companion to TYC 4110-01037-1 in a 79-day Orbit
Creators: name: Wisniewski, John P.
name: Ge, Jian
name: Crepp, Justin R.
name: De Lee, Nathan
name: Eastman, Jason
name: Esposito, Massimiliano
name: Fleming, Scott W.
name: Gaudi, B. Scott
name: Ghezzi, Luan
name: Hernandez, Jonay I. Gonzalez
name: Lee, Brian L.
name: Stassun, Keivan G.
name: Agol, Eric
name: Prieto, Carlos Allende
name: Barnes, Rory
name: Bizyaev, Dmitry
name: Cargile, Phillip
name: Chang, Liang
name: Da Costa, Luiz N.
name: De Mello, G. F. Porto
name: Femenia, Bruno
name: Ferreira, Leticia D.
name: Gary, Bruce
name: Hebb, Leslie
name: Holtzman, Jon
name: Liu, Jian
name: Ma, Bo
name: Mack, Claude E.
name: Mahadevan, Suvrath
name: Maia, Marcio A. G.
name: Nguyen, Duy Cuong
name: Ogando, Ricardo L. C.
name: Oravetz, Daniel J.
name: Paegert, Martin
name: Pan, Kaike
name: Pepper, Joshua
name: Rebolo, Rafael
name: Santiago, Basilio
name: Schneider, Donald P.
name: Shelden, Alaina C
name: Simmons, Audrey
name: Tofflemire, Benjamin M.
name: Wan, Xiaoke
name: Wang, Ji
name: Zhao, Bo
Publisher: name: arXiv
Year: 2012
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: TYC 4110-01037-1 has a low-mass stellar companion, whose small mass ratio and short orbital period are atypical amongst solar-like (Teff ~< 6000 K) binary systems. Our analysis of TYC 4110-01037-1 reveals it to be a moderately aged (~<5 Gyr) solar-like star having a mass of 1.07 +/- 0.08 MSun and radius of 0.99 +/- 0.18 RSun. We analyze 32 radial velocity measurements from the SDSS-III MARVELS survey as well as 6 supporting radial velocity measurements from the SARG spectrograph on the 3.6m TNG telescope obtained over a period of ~2 years. The best Keplerian orbital fit parameters were found to have a period of 78.994 +/- 0.012 days, an eccentricity of 0.1095 +/- 0.0023, and a semi-amplitude of 4199 +/- 11 m/s. We determine the minimum companion mass (if sin i = 1) to be 97.7 +/- 5.8 MJup. The system's companion to host star mass ratio, >0.087 +/- 0.003, places it at the lowest end of observed values for short period stellar companions to solar-like (Teff ~< 6000 K) stars. One possible way to create such a system would be if a triple-component stellar multiple broke up into a short period, low q binary during the cluster dispersal phase of its lifetime. A candidate tertiary body has been identified in the system via single-epoch, high contrast imagery. If this object is confirmed to be co-moving, we estimate it would be a dM4 star. We present these results in the context of our larger-scale effort to constrain the statistics of low mass stellar and brown dwarf companions to FGK-type stars via the MARVELS survey.
description: 22 pages; accepted in AJ
Oversampling Higher-Performing Minorities During Machine Learning Model Training Reduces Adverse Impact Slightly but Also Reduces Model Accuracy
Creators: name: Hickman, Louis
name: Kuruzovich, Jason
name: Ng, Vincent
name: Arhin, Kofi
name: Wilson, Danielle
Publisher: name: arXiv
Year: 2023
Subjects: subject: Machine Learning (cs.LG)
subject: Artificial Intelligence (cs.AI)
subject: Computers and Society (cs.CY)
subject: FOS: Computer and information sciences

description: Organizations are increasingly adopting machine learning (ML) for personnel assessment. However, concerns exist about fairness in designing and implementing ML assessments. Supervised ML models are trained to model patterns in data, meaning ML models tend to yield predictions that reflect subgroup differences in applicant attributes in the training data, regardless of the underlying cause of subgroup differences. In this study, we systematically under- and oversampled minority (Black and Hispanic) applicants to manipulate adverse impact ratios in training data and investigated how training data adverse impact ratios affect ML model adverse impact and accuracy. We used self-reports and interview transcripts from job applicants (N = 2,501) to train 9,702 ML models to predict screening decisions. We found that training data adverse impact related linearly to ML model adverse impact. However, removing adverse impact from training data only slightly reduced ML model adverse impact and tended to negatively affect ML model accuracy. We observed consistent effects across self-reports and interview transcripts, whether oversampling real (i.e., bootstrapping) or synthetic observations. As our study relied on limited predictor sets from one organization, the observed effects on adverse impact may be attenuated among more accurate ML models.
description: forthcoming in Personnel Psychology 2 figures
Bottlenecks in granular flow: When does an obstacle increase the flowrate in an hourglass?
Creators: name: Alonso-Marroquin, F.
name: Azeezullah, S. I.
name: Galindo-Torres, S. A.
name: Olsen-Kettle, L. M.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Bottlenecks occur in a wide range of applications from pedestrian and traffic flow to mineral and food processing. We examine granular flow across a bottleneck using particle-based simulations. Contrary to expectations we find that the flowrate across a bottleneck actually increases if an opti- mized obstacle is placed before it. The dependency of flowrate on obstacle diameter is derived using a phenomenological velocity-density relationship that peaks at a critical density. This relationship is in stark contrast to models of traffic flow, as the mean velocity does not depend only on density but attains hysteresis due to interaction of particles with the obstacle.
description: Submitted to Phys. Rev. Lett
Implementing curricular and pedagogical reforms in Chinese schools : a case of collaborating physics teachers
Creators: name: Fu, Guopeng
Publisher: name: University of British Columbia
Year: 2010

description: In 2001, China launched a large-scale educational reform encompassing curricular and pedagogical content in both elementary and secondary levels. Zhengzhou, a city in the Henan province, began to fully implement the reform in senior high schools in 2008. Consequently, the question that is critical to the reform process regarding physics, one of the science education curricula, is: What are physics teachers’ views on collaborative approaches to understanding and implementing the new curricular and pedagogical reforms in Zhengzhou senior high schools? This question was the focus of the research for this thesis. Investigating this question necessarily involved inquiring into the administrators’ perspectives on their role with regard to the teacher development. Face-to-face interviews were conducted in three senior high schools. Thirteen physics teachers, 2 administrators and 2 students were interviewed. Some classroom observations were made before the interview. Personal reflective journals were written after everyday’s investigation. Field notes and photos were taken to record the research context. The study indicated that teachers modified their pedagogy as a result of a collaborative process. The power hierarchy between experienced teachers and novice teachers was reduced because of the reform. The College Entrance Examination, students’ feedback, and administrative support were found to be key factors influencing successful teacher collaboration. Administrators provided and explored strategies for teacher development. Moreover, they created a supportive climate for teacher collaboration through school based incentives for systemic change.
Hamiltonicity in connected regular graphs
Creators: name: Cranston, Daniel W.
name: O, Suil
Publisher: name: arXiv
Year: 2012
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics

description: In 1980, Jackson proved that every 2-connected $k$-regular graph with at most $3k$ vertices is Hamiltonian. This result has been extended in several papers. In this note, we determine the minimum number of vertices in a connected $k$-regular graph that is not Hamiltonian, and we also solve the analogous problem for Hamiltonian paths. Further, we characterize the smallest connected $k$-regular graphs without a Hamiltonian cycle.
description: 5 pages
Extreme Wind Speed Estimation for Calgary
Creators: name: Antonio, Osvaldo
Publisher: name: Graduate Studies
Year: 2017
Subjects: subject: Engineering
subject: Engineering--Mechanical
subject: Gust Factor
subject: GEV distribution
subject: Gust Effect Factor

description: In this thesis are proposed methodologies to estimate gust factors at the extreme wind speed for Calgary from measurements at lower wind speeds using the Generalized Extreme Value (GEV) distribution. The GEV distribution is fitted to the data in order to select the most probable high value of gust factor. In the first part of this thesis variations of the GEV parameters to hourly mean wind speeds are investigated. The second part of this thesis addresses the methods for estimation of gust factors. Results show that GEV parameters are constant at extreme wind speeds and gust factors decrease with increasing wind speeds. Representative values of gust factors were found for extreme wind speeds. These values were found to be significantly lower than the gust effect factor for static structures mandated in the National Building Code of Canada (NBC) and the gust factor used in IEC Standard 61400-2 for wind turbines.
Noctua janthe
Creators: name: Wieser, Christian
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Lepidoptera
Noctuidae
Noctua
Noctua janthe

description: Noctua janthe (Borkhausen, 1792)
Das Problem der Unterscheidung der drei Schwesternarten Noctua janthina, N. janthe und N. tertia ist ein altes. Die dritte Art ist nur lokal aus Griechenland bekannt, die beiden anderen sind in Mitteleuropa weit verbreitet. Durch Detailerhebungen und Absicherung durch Barcodes konnte nunmehr jedenfalls Noctua janthe auch für Kärnten sicher belegt werden. Folgende Funde sind unzweifelhaft bzw. genetisch belegt. Wacholderhain bei Stein 8.9.2017 (Barcodekenndaten in BOLD: KLM Lep 08791/LEAST 1456-18); Villach, Spitzeckweg, 26.8.2017 und Bettlerkreuz W Völkermarkt 28.8.2008.
description: Published as part of Wieser, Christian, 2017, Weitere Erstfunde und bemerkenswerte Schmetterlingsnachweise aus Kärnten (Insecta: Lepidoptera), pp. 285-291 in Rudolfinum – Jahrbuch des Landesmuseums für Kärnten 2017 on page 291, DOI: 10.5281/zenodo.5725317
Relational Continuity: A Concept Analysis
Creators: name: Andres, Cheryl E.
Publisher: name: Graduate Studies
Year: 2016
Subjects: subject: Health Care Management
subject: Medicine and Surgery
subject: Mental Health
subject: Nursing
subject: FOS: Health sciences
subject: Public Health
subject: continuity
subject: relational
subject: concept analysis

description: Purpose: This study explores the concept of relational continuity within the context of primary care. Methods: Rodgers’ Evolutionary View of Concept Analysis was employed to identify attributes, antecedents, and consequences of relational continuity. Results: The attributes of relational continuity include an individual longitudinal connection with a primary care provider and team that is therapeutic in nature; responsive, co-constructed, whole person focused, and has an undergirding that connects care over time. It builds trust through mutual investment and shared accountability between provider, patient and team. Conclusions: A comprehensive understanding of relational continuity in the context of primary care is presented as an outcome of this concept analysis. It is recommended that further inquiry in this area focus on the development of theory and valid measures to accurately evaluate relational continuity in primary health care. Key Words: continuity, relational, concept analysis
Critical dynamics in systems controlled by fractional kinetic equations
Creators: name: Batalov, L. A.
name: Batalova, A. A.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The article is devoted to the dynamics of systems with an anomalous scaling near a critical point. The fractional stochastic equation of a Lanvevin type with the $φ^3$ nonlinearity is considered. By analogy with the model A the field theoretic model is built, and its propagators are calculated. The nonlocality of the new action functional in the coordinate representation is caused by the involving of the fractional spatial derivative. It is proved that the new model is multiplicatively renormalizable, the Gell-Man-Low function in the one-loop approximation is evaluted. The existence of the scaling behavior in the framework of the $\varepsilon$-expansion for a superdiffusion is established.
description: 25 pages, 1 figure
Benchmark dataset and instance generator for Real-World Three-Dimensional Bin Packing Problems
Creators: name: Osaba, Eneko
name: Villar-Rodriguez, Esther
name: Romero, Sebastián V.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: In this article, a benchmark for real-world bin packing problems is proposed. This dataset consists of 12 instances of varying levels of complexity regarding size (with the number of packages ranging from 38 to 53) and user-defined requirements. In fact, several real-world-oriented restrictions were taken into account to build these instances: i) item and bin dimensions, ii) weight restrictions, iii) affinities among package categories iv) preferences for package ordering and v) load balancing. Besides the data, we also offer an own developed Python script for the dataset generation, coined Q4RealBPP-DataGen. The benchmark was initially proposed to evaluate the performance of quantum solvers. Therefore, the characteristics of this set of instances were designed according to the current limitations of quantum devices. Additionally, the dataset generator is included to allow the construction of general-purpose benchmarks. The data introduced in this article provides a baseline that will encourage quantum computing researchers to work on real-world bin packing problems.
description: 11 pages, 4 figures
Investigating the role of NSMCE2 in cell cycle progression and genome
      maintenance
Creators: name: Dixon, Lily
Publisher: name: Lancaster University
Year: 2018

description: Preserving genome integrity is vital for protection against the
      development and progression of cancer. The SMC5/6 complex is an
      evolutionarily conserved protein complex thought to be involved in this
      process, specifically its SUMO ligase NSMCE2 subunit. Prior to this
      thesis, CRISPR-Cas-9 mutant NSMCE2 cell lines were produced; NSMCE2
      knockout, NSMCE2 knockout with wildtype NSMCE2 re-expression and NSMCE2
      knockout cells with ligase-dead NSMCE2 expression. The purpose of this
      research was to characterize these cell lines with the aim of suggesting
      possible roles for NSMCE2. Both the NSMCE2 knockout and NSMCE2 ligase-dead
      cell lines demonstrated proliferation defects and slowed S phase
      progression by FACS analysis, with the defect exacerbated in the
      ligase-dead cells. The remainder of this project investigated the cause of
      these defects, determining that it is not due to the activation of the
      replication checkpoint, although the ligase-dead cell lines did activate
      the S phase DNA damage checkpoint. Based on what is already known about
      NSMCE2 function, it is suggested that the most likely cause of the
      proliferation defects is un-sensed, unresolved replication stress
      characteristics. Whilst other proteins may compensate for the total loss
      of NSMCE2, the ligase-dead cell line is expected to be the result of a
      dominant-negative mutation, which may explain the more pronounced S phase
      defect. The NSMCE2 ligase-dead cell lines also demonstrate a >4N
      DNA content, so it is speculated that unresolved replication stress
      characteristics may also cause segregation difficulties in this cell line.
      However, immunofluorescence and decatenation inhibitor treatment has shown
      that NSMCE2 may instead or also be involved in activating the decatenation
      checkpoint to allow for efficient segregation. A bioSUMO method for
      isolation of specific SUMOylation targets has also been developed with the
      aim to analyse specific NSMCE2 modifications within the future.
Broadcasting Canada's War: How the Canadian Broadcasting Corporation Reported the Second World War
Creators: name: Sweazey, Connor
Publisher: name: Graduate Studies
Year: 2017
Subjects: subject: Journalism
subject: Mass Communications
subject: Education--Technology
subject: Canadian Studies
subject: History--Modern
subject: History--Canadian
subject: Military Studies
subject: CBC
subject: Journalist
subject: Propaganda
subject: Censorship
subject: Canada
subject: WW2
subject: Radio

description: Public Canadian radio was at the height of its influence during the Second World War. Reacting to the medium’s growing significance, members of the Canadian Broadcasting Corporation (CBC) accepted that they had a wartime responsibility to maintain civilian morale. The CBC thus unequivocally supported the national cause throughout all levels of its organization. Its senior administrations and programmers directed the CBC’s efforts to aid the Canadian war effort. Similarly, CBC news editors conceded that the necessities of total war and the intimate nature of radio news demanded that they adapt new measures of censorship wholly unique to the medium. At the frontlines, CBC war correspondents broadcast eye-witness testimonies and sounds of the conflict which mitigated the geographic distance between the war overseas and the Canadian homefront as never before. This unprecedented advance in the realism of war journalism propagandized the values and achievements of the Canadian armed forces.
Dominance of Radiation Pressure in Ion Acceleration with Linearly Polarized Pulses at Intensities of $10^{21}\textrm{W}\textrm{cm}^{-2}$
Creators: name: Qiao, B.
name: Kar, S.
name: Geissler, M.
name: Gibbon, P.
name: Zepf, M.
name: Borghesi, M.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: Accelerator Physics (physics.acc-ph)
subject: FOS: Physical sciences

description: A novel regime is proposed where, employing linearly polarized laser pulses at intensities $10^{21}\textrm{Wcm}^{-2}$ as two order of magnitude lower than earlier predicted [T. Esirkepov et al., Phys. Rev. Lett. 92, 175003 (2004)], ions are dominantly accelerated from ultrathin foils by the radiation pressure, and have monoenergetic spectra. In the regime, ions accelerated from the hole-boring process quickly catch up with the ions accelerated by target normal sheath acceleration (TNSA), and they then join in a single bunch, undergoing a hybrid Light-Sail/TNSA acceleration. Under an appropriate coupling condition between foil thickness, laser intensity and pulse duration, laser radiation pressure can be dominant in this hybrid acceleration. Two-dimensional PIC simulations show that $1.26\textrm{GeV}$ quasimonoenergetic $\textrm{C}^{6+}$ beams are obtained by linearly polarized laser pulses at intensities of $10^{21}\textrm{Wcm}^{-2}$.
description: 6 pages, 4 figures
On the X-ray low- and high-velocity outflows in AGNs
Creators: name: Ramirez, J. M.
name: Tombesi, F.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: An exploration of the relationship between bolometric luminosity and outflow velocity, for two classes of X-ray outflows in a large sample of active galactic nuclei has been performed. We find that line radiation pressure could be one physical mechanism that might accelerate the gas we observe in warm absorber, v~100-1000 km/s, and on comparable but less stringent grounds the ultra-fast outflows (UFOs), v~0.03-0.3c. If comparable with the escape velocity of the system; the first is naturally located at distances of the dusty torus, ~ 1 pc, and the second at sub-parsec scales, ~ 0.01 pc, in accordance with large set of observational evidence existing in the literature. The presentation of this relationship might give us key clues for our understanding of the different physical mechanisms acting in the center of galaxies, the feedback process and its impact on the evolution of the host galaxy.
description: Accepted for publication as a Letter to the Editor in Monthly Notices of the Royal Astronomical Society Letters
Measurement of two independent phase-shifts using coupled parametric amplifiers
Creators: name: Khadka, Utsab
name: Sheng, Jiteng
name: Yang, Xihua
name: Xiao, Min
Publisher: name: arXiv
Year: 2011
Subjects: subject: Optics (physics.optics)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: In this article, we demonstrate a scheme capable of two-phase measurement, i.e. the simultaneous measurement of the two phase-shifts occurring in two independent Mach-Zehnder interferometers using one intensity detector. Our scheme utilizes dark-state-enhanced coupled parametric amplifiers in an atomic medium to mix the multiple fields probing the various arms of the interferometers in parallel. The two phase-differences are then encoded in separate continuous-variable parameters in the spectral waveform of the parametrically amplified atom-radiated signal field, which can be directly decoupled in a single intensity measurement. Besides resolving two phase differences in parallel, this method can also be used to increase the channel capacity in optical and quantum communication by the simultaneous use of phase-modulation and amplitude-modulation.
description: 8 pages, 4 figures
Electron backscattering from stacking faults in SiC by means of \textit{ab initio} quantum transport calculations
Creators: name: Deretzis, I.
name: Camarda, M.
name: La Via, F.
name: La Magna, A.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We study coherent backscattering phenomena from single and multiple stacking faults (SFs) in 3C- and 4H-SiC within density functional theory quantum transport calculations. We show that SFs give rise to highly dispersive bands within both the valance and conduction bands that can be distinguished for their enhanced density of states at particular wave number subspaces. The consequent localized perturbation potential significantly scatters the propagating electron waves and strongly increases the resistance for $n$-doped systems. We argue that resonant scattering from SFs should be one of the principal degrading mechanisms for device operation in silicon carbide.
description: 5 pages, 4 figures
Supplemental materials for "In-situ magnetic identification of giant, needle-shaped magnetofossils in Paleocene-Eocene Thermal Maximum sediments"
Creators: name: Wagner, Courtney
name: Egli, Ramon
name: Lascu, Ioan
name: Lippert, Peter
name: Livi, Kenneth
name: Sears, Helen
Publisher: name: figshare
Year: 2020
Subjects: subject: Paleoclimatology
subject: 40406 Magnetism and Palaeomagnetism
subject: FOS: Earth and related environmental sciences
subject: 40305 Marine Geoscience

description: Supplementary materials for "In-situ magnetic identification of giant, needle-shaped magnetofossils in Paleocene-Eocene Thermal Maximum sediments." Included here is our supplemental document, eight movie files, and four first-order reversal curve datasets (each dataset includes multiple, stacked FORC files).
Far-Infrared to Millimeter Astrophysical Dust Emission. II: Comparison of the Two-Level Systems (TLS) model with Astronomical Data
Creators: name: Paradis, D.
name: Bernard, J. -P.
name: Mény, C.
name: Gromov, V.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: In a previous paper we proposed a new model for the emission by amorphous astronomical dust grains, based on solid-state physics. The model uses a description of the Disordered Charge Distribution (DCD) combined with the presence of Two-Level Systems (TLS) defects in the amorphous solid composing the grains. The goal of this paper is to confront this new model to astronomical observations of different Galactic environments in the FIR/submm, in order to derive a set of canonical model parameters to be used as a Galactic reference to be compared to in future Galactic and extragalactic studies. We confront the TLS model with existing astronomical data. We consider the average emission spectrum at high latitudes in our Galaxy as measured with FIRAS and WMAP, as well as the emission from Galactic compact sources observed with Archeops, for which an inverse relationship between the dust temperature and the emissivity spectral index has been evidenced. We show that, unlike models previously proposed which often invoke two dust components at different temperatures, the TLS model successfully reproduces both the shape of the Galactic SED and its evolution with temperature as observed in the Archeops data. The best TLS model parameters indicate a charge coherence length of \simeq 13 nm and other model parameters in broad agreement with expectations from laboratory studies of dust analogs. We conclude that the millimeter excess emission, which is often attributed to the presence of very cold dust in the diffuse ISM, is likely caused solely by TLS emission in disordered amorphous dust grains. We discuss the implications of the new model, in terms of mass determinations from millimeter continuum observations and the expected variations of the emissivity spectral index with wavelength and dust temperature. The implications for the analysis of the Herschel and Planck satellite data are discussed.
description: Accepted for publication in A&A (16 pages, 9 figures, 6 tables)
Misère de l’intégration socioprofessionnelle des groupes ethnoculturels au Canada : Analyse de la souffrance de position et de condition des réfugiés haïtiens de dernières pluies sur le marché du travail québécois
Creators: name: Stherson Senat
Publisher: name: figshare
Year: 2020
Subjects: subject: Sociology
subject: FOS: Sociology

description: Ce papier analyse la misère de l'intégration professionnelle des Haïtiens à Québec.
Frozen time in hyperbolic spacetime motion
Creators: name: Bergstrom, Arne
Publisher: name: arXiv
Year: 2011
Subjects: subject: General Physics (physics.gen-ph)
subject: FOS: Physical sciences
subject: 83A05

description: According to the Lorentz transformation and clearly seen from the Minkowski diagram, hyperbolic spacetime motion of a test object relative to a stationary reference frame can be performed in a specific way such that time becomes frozen in the moving frame of the test object. In that case, time can be arranged to become frozen even at moderate relativistic velocities, in contrast to the minute traditional relativistic time dilation at such velocities. An appendix gives a simple illustration in Minkowski form of how time in a frame in hyperbolic motion can become frozen to a complete standstill relative to a stationary frame. (Published in Phys. Scr. 84 (2011) 035004) In addition to the paper, the arXiv file also contains a discussion of Frequently Asked Questions from readers. Further questions not adequately dealt with in the existing FAQ are welcome.
description: Paper (5 pages, 5 figures) plus FAQ (12 pages, 9 figures), FAQ #2a revised and extended
Corrigenda to: Judson, M.L.I. 2018. Ontogeny and evolution of the duplex trichobothria of Pseudoscorpiones (Arachnida)
Creators: name: Judson, M.L.I.
Publisher: name: Zenodo
Year: 2019
Subjects: Pseudoscorpions, trichobothria, corrections

description: Corrigenda to published article: Judson, M.L.I. 2018. Ontogeny and evolution of the duplex trichobothria of Pseudoscorpiones (Arachnida). Zoologischer Anzeiger, 273: 133–151.
An Observational Overview of Solar Flares
Creators: name: Fletcher, Lyndsay
name: Dennis, Brian R.
name: Hudson, Hugh S.
name: Krucker, Sam
name: Phillips, Ken
name: Veronig, Astrid
name: Battaglia, Marina
name: Bone, Laura
name: Caspi, Amir
name: Chen, Qingrong
name: Gallagher, Peter
name: Grigis, Paolo C.
name: Ji, Haisheng
name: Milligan, Ryan O.
name: Temmer, Manuela
Publisher: name: arXiv
Year: 2011
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present an overview of solar flares and associated phenomena, drawing upon a wide range of observational data primarily from the RHESSI era. Following an introductory discussion and overview of the status of observational capabilities, the article is split into topical sections which deal with different areas of flare phenomena (footpoints and ribbons, coronal sources, relationship to coronal mass ejections) and their interconnections. We also discuss flare soft X-ray spectroscopy and the energetics of the process. The emphasis is to describe the observations from multiple points of view, while bearing in mind the models that link them to each other and to theory. The present theoretical and observational understanding of solar flares is far from complete, so we conclude with a brief discussion of models, and a list of missing but important observations.
description: This is an article for a monograph on the physics of solar flares, inspired by RHESSI observations. The individual articles are to appear in Space Science Reviews (2011)
Radiolitid rudists: An underestimated archive for cretaceous climate reconstruction?
Creators: name: Schmitt, Katharina E.
name: Huck, Stefan
name: Krummacker, Malte
name: De Winter, Niels J.
name: Godet, Alexis
name: Claeys, Philip
name: Heimhofer, Ulrich
Publisher: name: Oslo : Universitetsforlaget
Year: 2022
Subjects: subject: bivalve
subject: carbonate platform
subject: Cretaceous
subject: diagenesis
subject: environmental conditions
subject: Dewey Decimal Classification::500 | Naturwissenschaften::550 | Geowissenschaften

description: Rudist shells are important archives for palaeoenvironmental reconstructions in the greenhouse world of the Cretaceous. Radiolitids, a family of rudists became very abundant dwellers of the shallow marine carbonate platforms during the Cretaceous. Still, due to the complex structure of their low-Mg calcite outer shell layer, radiolitids are often deemed unsuitable for palaeoenvironmental reconstructions. The aim of this study is to present a combination of petrographic (transmitted light microscopy and cathodoluminescence microscopy) and elemental analyses (high-resolution μXRF and stable isotope) to investigate radiolitid shells for diagenetic alteration and to make them accessible as an archive for environmental conditions during the mid-Cretaceous. Four Eoradiolitites shells were analysed in detail: two right valves (RV), a left valve (LV) with an articulated RV and an isolated LV. Three shell structure types have been identified, including a non-compact, compact and celluloprismatic types. The compact structure type was identified in the LVs while the other two types were observed exclusively in the RVs. Radiolitid shell material composed of the non-compact and the compact structure types can be used as palaeoenvironmental archives as it preserved seasonal signals in both, shell growth structure and isotopic records, while celluloprismatic shell structures are less suitable for reconstructions due to diagenetic alteration. The alternation of dark and light lamellae in both valves, RV and LV, provide information on the intertidal living habitat of the shell-producing organism and its life span. Cretaceous; radiolitid rudists; petrographic and rlemental analyses; right and left valves; palaeoenvironmental reconstruction
Exploring room temperature spin transport under band gap opening in bilayer graphene
Creators: name: Anderson, Christopher R.
name: Natera-Cordero, Noel
name: Guarochico-Moreira, Victor H.
name: Grigorieva, Irina V.
name: Vera-Marun, Ivan J.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We study the room-temperature electrical control of charge and spin transport in high-quality bilayer graphene, fully encapsulated with hBN and contacted via 1D spin injectors. We show that spin transport in this device architecture is measurable at room temperature and its spin transport parameters can be modulated by opening of a band gap via a perpendicular displacement field. The modulation of the spin current is dominated by the control of the spin relaxation time with displacement field, demonstrating the basic operation of a spin-based field-effect transistor.
El hombre que creaba vínculos
Creators: name: Bayés, Ramón
Publisher: name: Psicosomàtica y Psiquiatría
Year: 2023

description: Sección coordinada por el Dr Jesús J. de la Gándara
description: Psicosomàtica y Psiquiatría, Núm. 25 (2023): abril-mayo-junio
Supplemental materials for "In situ magnetic identification of giant, needle-shaped magnetofossils in Paleocene-Eocene Thermal Maximum sediments"
Creators: name: Wagner, Courtney
name: Egli, Ramon
name: Lascu, Ioan
name: Lippert, Peter
name: Livi, Kenneth
name: Sears, Helen
Publisher: name: figshare
Year: 2020
Subjects: subject: Paleoclimatology
subject: 40406 Magnetism and Palaeomagnetism
subject: FOS: Earth and related environmental sciences
subject: 40305 Marine Geoscience

description: Supplementary materials for "In situ magnetic identification of giant, needle-shaped magnetofossils in Paleocene-Eocene Thermal Maximum sediments." Included here is our supplemental document, eight movie files, and four first-order reversal curve datasets (each dataset includes multiple, stacked FORC files).
A Recommendation System for Planning Software Releases
Creators: name: Mohebzada, Jamshaid G.
Publisher: name: Graduate Studies
Year: 2012
Subjects: subject: Business Administration--Management
subject: Computer Science
subject: release planning
subject: Recommendation Systems
subject: sensitivity analysis
subject: Simulation
subject: product management
subject: Machine Learning

description: Strategic release planning is a critical step in iterative software development. It involves assignment of requirements to subsequent releases in consideration of constraints and stakeholder demands. Manually analyzing release planning projects is challenging since large volumes of data are involved, and release planning models are dependent on several input parameters and complex algorithms. A recommendation system, called SRP-Plugin 2.0, is presented in this thesis to assist product managers with better release decisions. First, literature is reviewed systematically for related recommendation systems (contribution 1). SRP-Plugin 2.0 is realized using four techniques. Simulation and sensitivity analysis are utilized to determine the important input parameters (contribution 2). Machine learning is used for predicting the impacts on the release plans due to project changes (contribution 3). A recommendation method assists with achieving certain release planning targets (contribution 4). Finally, SPR-Plugin 2.0 is implemented as a plug-in for an integrated development environment (contribution 5).
ALT: An Automatic System for Long Tail Scenario Modeling
Creators: name: Zhang, Ya-Lin
name: Zhou, Jun
name: Ren, Yankun
name: Zhang, Yue
name: Yang, Xinxing
name: Li, Meng
name: Shi, Qitao
name: Li, Longfei
Publisher: name: arXiv
Year: 2023
Subjects: subject: Machine Learning (cs.LG)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: In this paper, we consider the problem of long tail scenario modeling with budget limitation, i.e., insufficient human resources for model training stage and limited time and computing resources for model inference stage. This problem is widely encountered in various applications, yet has received deficient attention so far. We present an automatic system named ALT to deal with this problem. Several efforts are taken to improve the algorithms used in our system, such as employing various automatic machine learning related techniques, adopting the meta learning philosophy, and proposing an essential budget-limited neural architecture search method, etc. Moreover, to build the system, many optimizations are performed from a systematic perspective, and essential modules are armed, making the system more feasible and efficient. We perform abundant experiments to validate the effectiveness of our system and demonstrate the usefulness of the critical modules in our system. Moreover, online results are provided, which fully verified the efficacy of our system.
Which Schubert varieties are local complete intersections?
Creators: name: Úlfarsson, Henning
name: Woo, Alexander
Publisher: name: arXiv
Year: 2011
Subjects: subject: Algebraic Geometry (math.AG)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 14M15, 05A05, 05E15, 05E40, 14M10, 20F55

description: We characterize by pattern avoidance the Schubert varieties for GL_n which are local complete intersections (lci). For those Schubert varieties which are local complete intersections, we give an explicit minimal set of equations cutting out their neighborhoods at the identity. Although the statement of our characterization only requires ordinary pattern avoidance, showing that the Schubert varieties not satisfying our conditions are not lci appears to require working with more general notions of pattern avoidance. The Schubert varieties defined by inclusions, originally introduced by Gasharov and Reiner, turn out to be an important subclass, and we further develop some of their combinatorics. Applications include formulas for Kostant polynomials and presentations of cohomology rings for lci Schubert varieties.
description: 54 pages, 6 figures