cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Low-Mass X-ray Binaries and Globular Clusters in Early-Type Galaxies. I. Chandra Observations
Creators: name: Humphrey, Philip J.
name: Buote, David A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present a Chandra survey of LMXBs in 24 early-type galaxies. Correcting for detection incompleteness, the X-ray luminosity function (XLF) of each galaxy is consistent with a powerlaw with negative logarithmic differential slope, beta~2.0. However, beta strongly correlates with incompleteness, indicating the XLF flattens at low-Lx. The composite XLF is well-fitted by a powerlaw with a break at 2.21(+0.65,-0.56)E38 erg/s and beta=1.40(+0.10,-0.13) and 2.84(+0.39,-0.30) below and above it, respectively. The break is close to the Eddington limit for a 1.4Msun neutron-star, but the XLF shape rules out its representing the division between neutron-star and black-hole systems. Although the XLFs are similar, we find evidence of some variation between galaxies. The high-Lx XLF slope does not correlate with age, but may correlate with [alpha/Fe]. Considering only LMXBs with Lx>1E37 erg/s, matching the LMXBs with globular clusters (GCs) identified in HST observations of 19 of the galaxies, we find the probability a GC hosts an LMXB is proportional to LGC^alpha ZFe^gamma} where alpha=1.01+/-0.19 and gamma=0.33+/-0.11. Correcting for GC luminosity and colour effects, and detection incompleteness, we find no evidence that the fraction of LMXBs with Lx>1e37 erg/s in GCs (40%), or the fraction of GCs hosting LMXBs (~6.5%) varies between galaxies. The spatial distribution of LMXBs resembles that of GCs, and the specific frequency of LMXBs is proportional to the GC specific luminosity, consistent with the hypothesis that all LMXBs form in GCs. If the LMXB lifetime is tau and the duty cycle is Fd, our results imply ~1.5 (tau/1E8 yr)^-1 /Fd LMXBs are formed per Gyr per GC and we place an upper limit of 1 active LMXB in the field per 3.4E9Lsun of V-band luminosity.
description: 24 pages, 17 figures and 6 tables. Accepted for publication in the Astrophysical Journal. Expanded discussion and various minor revisions to improve robustness of results. Conclusions unchanged
title: Demersales survey (1983‐2023), 40 years monitoring the demersal resources and ecosystems of the Bay of Biscay
Creators: name: Blanco, Marian
name: Olaso-Toca, Luis Ignacio
name: Sánchez, Francisco
name: Serrano, Alberto
name: Punzón, Antonio
name: Preciado, Izaskun
name: González-Irusta, J. M.
name: Ruiz-Pico, Susana
name: Fernández-Zapico, Olaya
name: Velasco, Francisco
Publisher: name: Digital.CSIC
Year: 2023

description: ICES Annual Science Conference 2023, Bilbao, Spain (11-14 September).
description: The Northern Spanish Shelf Bottom Trawl survey has been carried out every autumn since 1983, to provide data and information for the assessment of the commercial fish species and the ecosystems on the Galician and Cantabrian shelves.
Responses of Diaptomus spp. from an oligotrophic lake to variations in food quality
Creators: name: Butler, Nancy M.
Publisher: name: University of British Columbia
Year: 2011

description: Copepods live in a nutritionally dilute environment, experiencing temporal and spatial variations in food supply which differ in magnitude and predictability. Understanding the mechanisms by which organisms deal with changes in their food is a primary concern in elucidating the nutritional ecology of zooplankton and the role of food in structuring zooplankton communities. In this thesis, I examine changes in behavior, morphology, and physiology of two species of calanoid copepods (Diaptomus kenai and D. leptopus) in response to variation in food composition and density. In Chapter Two, I present a study of population-level responses to variation in food composition and quality, using fertilization techniques to generate a range of phytoplankton communities in field enclosures. The phytoplankton assemblages studied supported copepod populations which differed in such attributes as population size, reproduction, and body size. The most striking finding of this study was the occurrence of two co-existing size classes of D. kenai, the abundance and clutch size of which varied among the enclosures, suggesting differences between the two classes in their ability to utilize the different phytoplankton communities. Chapter Three investigates patterns of lipid storage in response to changes in food supply. I concluded that lipid stores were affected by species composition of the phytoplankton food and the two copepod species differed in their sensitivity to differences in cell chemistry. Chapter Four investigates behavioral responses of the two size classes of D. kenai to changes in food composition and abundance. Subtle differences in feeding behavior suggest that the two sizes differ in their utilization of available food. These results demonstrate that D. kenai and D. leptopus are capable of responding to changes in their food supply through modifications of their behavior, morphology, and physiology over a range of magnitudes and time scales. There can be very subtle changes in feeding behavior or very pronounced changes in size structure. Responses occur over time scales ranging from hours to days to seasons. These results also bring into question the utility of models generated under laboratory conditions in predicting behaviors or dynamics of copepod populations and communities in nature.
title: How does bottom trawling affect benthic invertebrates size in the Bay of Biscay?
Creators: name: Blanco, Marian
name: González-Irusta, J. M.
name: Martín, I.
name: Punzón, Antonio
name: Velasco, Francisco
name: Ruiz-Pico, Susana
name: Serrano, Alberto
Publisher: name: Digital.CSIC
Year: 2024

description: XVIIIth International Symposium on Oceanography of the Bay of Biscay La Rochelle June 5th to 7th, 2024.
description: Bottom trawling affects benthic communities at different levels, changing the species composition and modifying the size structure of those species able to survive impact (Blanchard et al, 2004; Queirós et al, 2006). In this work we have analysed the impact of this anthropogenic pressure on representative invertebrates in the southern Bay of Biscay, in order to assess the MSFD good environmental status of habitats.
Gas Detection and Identification Using Multimodal Artificial Intelligence Based Sensor Fusion
Creators: name: Narkhede, Parag
name: Walambe, Rahee
name: Mandaokar, Shruti
name: Chandel, Pulkit
name: Kotecha, Ketan
name: Ghinea, George
Publisher: name: arXiv
Year: 2021
Subjects: subject: Signal Processing (eess.SP)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: With the rapid industrialization and technological advancements, innovative engineering technologies which are cost effective, faster and easier to implement are essential. One such area of concern is the rising number of accidents happening due to gas leaks at coal mines, chemical industries, home appliances etc. In this paper we propose a novel approach to detect and identify the gaseous emissions using the multimodal AI fusion techniques. Most of the gases and their fumes are colorless, odorless, and tasteless, thereby challenging our normal human senses. Sensing based on a single sensor may not be accurate, and sensor fusion is essential for robust and reliable detection in several real-world applications. We manually collected 6400 gas samples (1600 samples per class for four classes) using two specific sensors: the 7-semiconductor gas sensors array, and a thermal camera. The early fusion method of multimodal AI, is applied The network architecture consists of a feature extraction module for individual modality, which is then fused using a merged layer followed by a dense layer, which provides a single output for identifying the gas. We obtained the testing accuracy of 96% (for fused model) as opposed to individual model accuracies of 82% (based on Gas Sensor data using LSTM) and 93% (based on thermal images data using CNN model). Results demonstrate that the fusion of multiple sensors and modalities outperforms the outcome of a single sensor.
description: 14 Pages, 9 Figures
Conceptual Temporal Modeling Applied to Databases
Creators: name: Al-Fedaghi, Sabah
Publisher: name: arXiv
Year: 2021
Subjects: subject: Software Engineering (cs.SE)
subject: Databases (cs.DB)
subject: FOS: Computer and information sciences

description: We present a different approach to developing a concept of time for specifying temporality in the conceptual modeling of software and database systems. In the database field, various proposals and products address temporal data. The difficulty with most of the current approaches to modeling temporality is that they represent and record time as just another type of data (e.g., values of a bank balance or amounts of money), instead of appreciating that time and its values are unique, in comparison to typical data attributes. Time is an engulfing phenomenon that lifts a system s entire model from staticity to dynamism and beyond. In this paper, we propose a conceptualization of temporality involving the construction of a multilevel modeling method that progresses from static representation to system compositions that form regions of dynamism. Then, a chronology of events is used to define the system s behavior. Lastly, the events are viewed as data sources with which to build a temporal model. A case-study model of a temporal banking-management system database that extends UML and the object-constraint language is re-modeled using thinging machine (TM) modeling. The resultant TM diagrammatic specification delivers a new approach to temporality that can be extended to be a holistic monitoring system for historic data and events.
description: 11 pages, 15 figures
AI Powered Road Network Prediction with Multi-Modal Data
Creators: name: Gengec, Necip Enes
name: Tari, Ergin
name: Bagci, Ulas
Publisher: name: arXiv
Year: 2023
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Artificial Intelligence (cs.AI)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: This study presents an innovative approach for automatic road detection with deep learning, by employing fusion strategies for utilizing both lower-resolution satellite imagery and GPS trajectory data, a concept never explored before. We rigorously investigate both early and late fusion strategies, and assess deep learning based road detection performance using different fusion settings. Our extensive ablation studies assess the efficacy of our framework under diverse model architectures, loss functions, and geographic domains (Istanbul and Montreal). For an unbiased and complete evaluation of road detection results, we use both region-based and boundary-based evaluation metrics for road segmentation. The outcomes reveal that the ResUnet model outperforms U-Net and D-Linknet in road extraction tasks, achieving superior results over the benchmark study using low-resolution Sentinel-2 data. This research not only contributes to the field of automatic road detection but also offers novel insights into the utilization of data fusion methods in diverse applications.
Compromisso social e desenvolvimento local: desafios no financiamento da Universidade do Estado da Bahia (UNEB)
Creators: name: Mota Júnior, Antônio de Macêdo
Publisher: name: figshare
Year: 2021
Subjects: subject: 130103 Higher Education
subject: FOS: Educational sciences
subject: 130304 Educational Administration, Management and Leadership

description: Este trabalho aborda o tema dos desafios do financiamento de uma universidade pública no que diz respeito ao seu compromisso social e contribuição para o desenvolvimento local. Desse modo, este estudo apresenta os resultados preliminares de uma pesquisa exploratório-descritiva, bibliográfica e documental, com o objetivo de analisar os desafios relacionados ao contexto do financiamento da Universidade do Estado da Bahia (UNEB) e seus impactos para o compromisso social dessa universidade, ao assumir sua missão institucional e contribuição para o desenvolvimento local das regiões onde se encontra inserida. Para tanto, foi necessário contextualizar o surgimento e a atuação dessa universidade, além de apresentar conceitos sobre compromisso social e abordar a relação entre universidade e desenvolvimento local. Os resultados destacam os impactos das restrições orçamentárias enfrentadas por essa universidade, no que se refere ao desempenho dessa instituição para com o seu compromisso social e desenvolvimento local.
Comparison of different spectral population models
Creators: name: Koleva, Mina
name: Prugniel, Philippe
name: Ocvirk, Pierre
name: Borgne, Damien Le
name: Chilingarian, Igor
name: Soubiran, Caroline
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We have compared simple stellar populations (SSPs) generated with different population synthesis tools: BC03, Vazdekis and Pegase.HR and different stellar libraries: ELODIE3.1, SteLib and MILES. We find that BC03/SteLib SSPs are biased toward solar metallicity, however Pegase.HR/ELODIE3.1 and Vazdekis/MILES are extremely consistent. The extensive coverage of the space of atmospheric parameters in the large stellar libraries allows precise synthesis for a large range of ages (0.1 .. 10 Gyr) and metallicities (-2 .. +0.4 dex) limited by the quality of the determination of stellar parameters (like temperature scale of the giants).
description: 2 pages; proceedings of IAU Symposium No. 241, "Stellar Populations as Building Blocks of Galaxies", editors A. Vazdekis and R. Peletier
Spectral modelling of the high energy emission of the magnetar 4U 0142+614
Creators: name: Rea, Nanda
name: Turolla, Roberto
name: Zane, Silvia
name: Tramacere, Andrea
name: Stella, Luigi
name: Israel, Gianluca
name: Campana, Riccardo
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present an empirical spectral modelling of the high energy emission of the anomalous X-ray pulsar 4U 0142+614, based on simultaneous Swift and INTEGRAL observations from X to gamma-ray energies. We adopted models contained in the XSPEC analysis package, as well as models based on recent theoretical studies, and restricted ourselves to those combinations of up to three components which produce a good fit while requiring the lowest number of free parameters. Only three models were found to fit satisfactorily the 0.5-250keV spectrum of 4U 0142+614: i) a ~0.4keV blackbody and two power-laws, ii) a resonant cyclotron scattering model plus a power-law and iii) two log-parabolic functions. We found that only the latter two models do not over-predict the infrared/optical emission observed simultaneously from this AXP, and only the log-parabolic functions can naturally account for the upper limits set by COMPTEL in the gamma-ray range. A possible interpretation of the two log-parabolae in terms of inverse Compton scattering of soft X-ray photons by very energetic particles is discussed.
description: 5 pages, 2 figures; accepted for publication in ApJ Letter
Generically, Arnold-Liouville Systems Cannot be Bi-Hamiltonian
Creators: name: Boualem, Hassan
name: Brouzet, Robert
Publisher: name: arXiv
Year: 2021
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 26A21, 26B35, 26B40, 37J35, 37J39, 58K15, 70H06

description: We state and prove that a certain class of smooth functions said to be BH-separable is a meagre subset for the Fréchet topology. Because these functions are the only admissible Hamiltonians for Arnold-Liouville systems admitting a bi-Hamiltonian structure, we get that, generically, Arnold-Liouville systems cannot be bi-Hamiltonian. At the end of the paper, we determine, both as a concrete representation of our general result and as an illustrative list, which polynomial Hamiltonians $H$ of the form $H(x,y)=xy+ax^3+bx^2y+cxy^2+dy^3$ are BH-separable.
Chaotic Capture of a Retrograde Moon by Venus and the Reversal of Its Spin
Creators: name: Makarov, Valeri V.
name: Goldin, Alexey
Publisher: name: arXiv
Year: 2023
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: (Abridged) Planets are surrounded by fractal surfaces (traditionally called Hill spheres), separating the inner zones of long-term stable orbital motion of their satellites from the outer space where the gravitational pull from the Sun takes over. Through this surface, external minor bodies in trajectories loosely co-orbital to a planet can be stochastically captured by the planet without any assistance from external perturbative forces, and can become moons chaotically orbiting the planet for extended periods of time. Using state-of-the-art orbital integrators, we simulate such capture events for Venus, resulting in long-term attachment phases by reversing the forward integration of a moon initially attached to the planet and escaping it after an extended period of time. Although the probability of a long-term chaotic capture from a single encounter is generally low, the high density of co-orbital bodies in the primordial protoplanetary disk makes this outcome possible, if not probable. The early Venus was surrounded by a dusty gaseous disk of its own, which, coupled with the tidal dissipation of the kinetic energy in the moon and the planet, could shrink the initial orbit and stabilize the captured body within the Hill surface. The tidal torque from the moon, for which we use the historical name Neith, gradually brakes the prograde rotation of Venus, and then reverses it, while the orbit continues to decay. Neith eventually reaches the Roche radius and disintegrates, probably depositing most of its material on Venus' surface. Our calculations show that surface density values of about 0.06 kg m$^{-2}$ for the debris disk may be sufficient to stabilize the initial chaotic orbit of Neith and to bring it down within several radii of Venus, where tidal dissipation becomes more efficient.
description: Published in Universe, 2024, 10, 15
Constraints on Physical Properties of z~6 Galaxies Using Cosmological Hydrodynamic Simulations
Creators: name: Finlator, K.
name: Dave', R.
name: Oppenheimer, B.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We conduct a detailed comparison of broad-band spectral energy distributions of six z >= 5.5 galaxies against galaxies drawn from cosmological hydrodynamic simulations. We employ a new tool called SPOC, which constrains the physical properties of observed galaxies through a Bayesian likelihood comparison with model galaxies. For five out of six observed z>=5.5 objects, our simulated galaxies match the observations at least as well as simple star formation histories such as tau-models, with similar favored values obtained for the intrinsic physical parameters such as stellar mass and star formation rate, but with substantially smaller uncertainties. Our results are broadly insensitive to simulation choices for galactic outflows and dust reddening. Hence the existence of early galaxies as observed is broadly consistent with current hierarchical structure formation models. However, one of the six objects has photometry that is best fit by a bursty SFH unlike anything produced in our simulations, driven primarily by a high K-band flux. These findings illustrate how SPOC provides a robust tool for optimally utilizing hydrodynamic simulations (or any model that predicts galaxy SFHs) to constrain the physical properties of individual galaxies having only photometric data, as well as identify objects that challenge current models. (abridged)
description: 22 pages, 11 figures, accepted by MNRAS. Added discussions of dust, numerical resolution; clarified conclusions
Microscale modelling of dielectrophoresis assembly processes
Creators: name: Tiribocchi, Adriano
name: Montessori, Andrea
name: Lauricella, Marco
name: Bonaccorso, Fabio
name: Brown, Keith A.
name: Succi, Sauro
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computational Physics (physics.comp-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: This work presents a microscale approach for simulating the dielectrophoresis (DEP) assembly of polarizable particles under an external electric field. The model is shown to capture interesting dynamical and topological features, such as the formation of chains of particles and their incipient aggregation into hierarchical structures. A quantitative characterization in terms of the number and size of these structures is also discussed. This computational model could represent a viable numerical tool to study the mechanical properties of particle-based hierarchical materials and suggest new strategies for enhancing their design and manufacture.
description: 7 pages, 7 figures
LaFeAsO$_{1-x}$F$_x$: A low carrier density superconductor near itinerant magnetism
Creators: name: Singh, D. J.
name: Du, M. H.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Density functional studies of 26K superconducting LaFeAs(O,F) are reported. We find a low carrier density, high density of states, $N(E_F)$ and modest phonon frequencies relative to $T_c$. The high $N(E_F)$ leads to proximity to itinerant magnetism, with competing ferromagnetic and antiferromagnetic fluctuations and the balance between these controlled by doping level. Thus LaFeAs(O,F) is in a unique class of high $T_c$ superconductors: high $N(E_F)$ ionic metals near magnetism.
description: Shortened published form. Typos corrected
Some Theoretical Implications of Short-Hard Gamma-Ray Burst observations
Creators: name: Nakar, Ehud
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Short-hard and long-soft gamma-ray bursts (GRBs) are two distinct phenomena, but their prompt and afterglow emission show many similarities. This suggests that two different progenitor systems lead to similar physical processes and that the prompt and afterglow observations of short-hard GRBs (SHBs) can be examined using models of long GRBs. Here, I discuss three conclusions that can be drawn from SHB observations. I show that the lower limit on the Lorentz factor of SHBs is typically ``only'' 10-50, significantly lower than that of long GRBs. SHBs with observed X-ray afterglow after 1 day are found to be roughly as efficient as long GRBs in converting the outflow energy into prompt gamma-rays. Finally, I examine the origin of SHBs with X-ray dark afterglows and find that the most plausible explanation is that these SHBs exploded in extremely low density environment ($n \lesssim 10^{-5} cm^{-3}$)
description: 9 pages, 2 figures; Proceedings of the 36th COSPAR Scientific Assembly, 2006, Beijing, China. Advances in Space Research in press
Umgang mit Beeinträchtigungen auf Sekundarstufe II: Ein Leitfaden für Lehrpersonen, Ausbildungsverantwortliche und andere Fachpersonen. Auf der Grundlage des EIL Projekts – Enhanced Inclusive Learning - Nachteilsausgleich und andere unterstützende Massnahmen auf Sekundarstufe II
Creators: name: Schellenberg, Claudia
name: Pfiffner, Matthias
name: Krauss, Annette
name: Georgi-Tscherry, Pia
Publisher: name: Zenodo
Year: 2020

description: Kein Abstract vorhanden
description: + ID der Publikation: hslu_81917 + Art des Beitrages: Leitfaden + Sprache: Deutsch + Letzte Aktualisierung: 2021-02-19 15:44:11
Wigner symmetries and Gleason's theorem
Creators: name: Semrl, Peter
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences
subject: 81P10, 81R15

description: We prove an optimal version of Wigner's unitary-antiunitary theorem. The main tool in our proof is Gleason's theorem.
End to end developments for the Multipurpose Interferometer Array Pathfinder from the IAR Electronics Laboratory
Creators: name: Gonzalez, J. M.
name: Command, H.
name: Valdez, G.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Applications (stat.AP)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: The Multipurpose Interferometer Array Pathfinder (MIA), developed from the Argentine Institute of Radio Astronomy (IAR), is a radio astronomical instrument based on interferometry techniques, designed for the detection of radio emission from astronomical sources. Phase one consists of 16 antennas of 5 meters in diameter, with the possibility of increasing their number. In addition, it is equipped with a dual polarization receiver with a bandwidth of 250 MHz, centered at 1325 MHz, and a digitizer and processor for the correlation functions. For the development of this instrument, a three antenna pathfinder is currently being built with its positioning control, radio frequency systems, acquisition and processing stages. This paper will describe the concept design and their current progress for each stage.
description: 5 pages, 7 figures
Metric-affine f(R) theories of gravity
Creators: name: Sotiriou, Thomas P.
name: Liberati, Stefano
Publisher: name: arXiv
Year: 2006
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics (astro-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: General Relativity assumes that spacetime is fully described by the metric alone. An alternative is the so called Palatini formalism where the metric and the connections are taken as independent quantities. The metric-affine theory of gravity has attracted considerable attention recently, since it was shown that within this framework some cosmological models, based on some generalized gravitational actions, can account for the current accelerated expansion of the universe. However we think that metric-affine gravity deserves much more attention than that related to cosmological applications and so we consider here metric-affine gravity theories in which the gravitational action is a general function of the scalar curvature while the matter action is allowed to depend also on the connection which is not {\em a priori} symmetric. This general treatment will allow us to address several open issues such as: the relation between metric-affine $f(R)$ gravity and General Relativity (in vacuum as well as in the presence of matter), the implications of the dependence (or independence) of the matter action on the connections, the origin and role of torsion and the viability of the minimal-coupling principle.
description: typos corrected, replaced to match published version
Theoretical study for 3D quantum Hall effect in a periodic electron system
Creators: name: Geng, H.
name: Qi, G. Y.
name: Sheng, L.
name: Chen, W.
name: Xing, D. Y.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The exsitance of three-dimensional Hall effect (3DQHE) due to spontaneous Fermi surface instabilities in strong magnetic field was proposed decades ago, and has stimulated recent progress in experiments. The reports in recent experiments show that the Hall plateaus and vanishing transverse magneto-resistivities (TMRs) (which are two main signatures of 3DQHE) are not easy to be observed in natural materials. And two main different explanations of the slow varying slope like Hall plateaus and non-vanishing TMRs (which can be called as quasi-quantized Hall effect (QQHE)) have been proposed. By studying the magneto-transport with a simple effective periodic 3D system, we show how 3DQHE can be achieved in certain parameter regimes at first. We find two new mechanisms that may give rise to QQHE. One mechanism is the "low" Fermi energy effect, and the other is the "strong" impurity effect. Our studies also proved that the artificial superlattice is an ideal platform for realizing 3DQHE with high layer barrier periodic potential.
Decay of a charged scalar and Dirac fields in the Kerr-Newman-de Sitter background
Creators: name: Konoplya, R. A.
name: Zhidenko, A.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We find the quasinormal modes of the charged scalar and Dirac fields in the background of the rotating charged black holes, described by the Kerr-Newman-de Sitter solution. The dependence of the quasinormal spectrum upon the black hole parameters mass M, angular momentum a, charge Q, as well as on values of the Λ-term and field charge q is investigated. Special attention is given to the near extremal limit of the black hole charge. In particular, we find that for both scalar and Dirac fields, charged perturbations decay quicker for q>0 and slower for q<0 for values of black holes charge Q less than than some threshold value, which is close to the extremal value of charge and depend on parameters of the black holes.
description: Phys. Rev. D, in press
Notions of the Spook: Recollections and Nostalgia Through Personal Artist Experiences of the Contemporary Australian Landscape
Creators: name: Usher, David
Publisher: name: University of Southern Queensland
Year: 2024
Subjects: visual arts
informed understanding
reflective
experiential
intuitive
cognisance

description: This practice-led research applies a variation of the Australian landscape en plein air painting tradition (Amory, 2007). Through my own interpretation of processes and concepts inherent to contemporary landscape practice, my paintings explore landscape narratives instilled with personal experiences and memories of place. These experiences and memories manifest through tacit knowledge as a creative presence in my artwork to represent what I have termed ‘the Spook’. The Spook is best described as a feeling – an affect – that represents a creative state that is intuitively informed and honed by the artist. The Spook does not manifest as a physical influence or entity per se, but rather functions as a creative intuition and awareness prompted by the artmaking process itself. Investigating the Spook as part of the overall creative experience provides a prompt to develop greater creative insights into the artist’s insight and the existing parameters and methods that define practice. Historical en plein air artists, Grace Cossington Smith and Ivon Hitchens and contemporary artists such as Joe Furlonger and Lucy Culliton whose practices utilise an ‘informed understanding’ (Sullivan 2010) of personal experiences and memories of place as subject matter, are addressed to inform the idea of the manifest creative presence of the Spook in an artwork. Deploying autoethnography and ethnography as subset methodologies, I unpack the personal narratives within the landscape context, including self and participant reflective journaling and participant surveys as methods. The findings reveal that the Spook is an identifiable and adaptable creative principle of practice that can be applied across creative arts, yet the Spook is individually experienced at different times, and across diverse creative forms. Key outcomes from this investigation into the Spook reveal the fundamental relationship that exists between the artist, the artwork, and the viewer, where the Spook provokes experiential creative cognisance that is ever-evolving and ever-transforming.
Effects of electromagnetic field on a radiating star
Creators: name: Jaryal, Suresh C.
name: Chatterjee, Ayan
name: Kumar, Akshay
Publisher: name: arXiv
Year: 2023
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this paper we study the shear free spherical symmetric gravitational collapse of charged radiating star. All the physical quantities including pressure, density are regular. Energy conditions are satisfied throughout the interior of the matter configuration. The luminosity is time independent and mass is radiated linearly. The causal and non causal temperature remains greater than that of the uncharged collapsing scenario.
description: arXiv admin note: text overlap with arXiv:2102.01422
Analysis of stellar populations with large empirical libraries at high spectral resolution
Creators: name: Prugniel, Philippe
name: Koleva, Mina
name: Ocvirk, Pierre
name: Borgne, Damien Le
name: Soubiran, Caroline
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The stellar population models dramatically progressed with the arrival of large and complete libraries, ELODIE, CFLIB (=Indo-US) and MILES at a relatively high resolution. We show that the quality of the fits is not anymore limited by the size of the stellar libraries in a large range of ages (0.1 to 10 Gyrs) and metallicities (-2 to +0.4 dex). The main limitations of the empirical stellar libraries are (i) the coverage of the parameters space (lack of hot stars of low metallicity), (ii) the precision and homogeneity of the atmospheric parameters and (iii) the non-resolution of individual element abundances (in particular [$α$/Fe]). Detailed abundance measurements in the large libraries, and usage of theoretical libraries are probably the next steps, and we show that a combination between an empirical (ELODIE) and a theoretical library (Coelho et al. 2005) immediately improves the modeling of ($α$-enhanced) globular clusters.
description: 4 pages; proceedings of IAU Symposium No. 241, "Stellar Populations as Building Blocks of Galaxies", editors A. Vazdekis and R. Peletier
“Why should I use a condom when I have a wife”? Barriers and motivations to PrEP use among HIV-1 serodiscordant couples in the Nigeria PrEP demonstration project: a qualitative perspective
Creators: name: Kolawole, Grace O
name: NY Dadem
name: Morenike Folayan
name: Anenih, James
name: Ezechi, Oliver
name: Idoko, John
name: Sani Aliyu
name: Team, The Nigeria PrEP Demonstration Project Research
Publisher: name: Gates Open Research
Year: 2019

description: Background: Antiretroviral pre-exposure prophylaxis (PrEP) reduces risk of HIV acquisition when taken regularly. Consistent condom use in addition to PrEP is critical for prevention of STI transmission. We qualitatively explored barriers and motivation to PrEP use among serodiscordant couples enrolled in the PrEP demonstration project in Nigeria.

Methods: Thirty eight (n=38) interviews were conducted across the demonstration sites. Four focus groups were held with joint couples. Interview questions covered (a) perception of sero discordancy, (b) barriers and motivation for use of PrEP, (c) history of condom use, and (d) changes in sexual activities. Responses corresponding to each study question were inductively summarized and assigned to descriptive categories using a coding scheme.

Results: Heterosexual sero-discordant couples were reluctant to the use of condoms consistently in addition to PrEP - because of the perception that PrEP alone was enough to protect them from HIV. Major motivations for PrEP use were to stay alive, stay negative, protect unborn children from acquiring HIV, and prevent sexual partners from acquiring HIV. Most couples expressed shock; fear and surprise when they learnt about their sero-discordant status. Negative partners reported a decline and change in sexual activities. Joint couple interviews revealed inconsistent condom use.

Conclusion: Most respondents were motivated to use PrEP to stay negative or protect their sex partners from acquiring HIV. Condom use among newly diagnosed serodiscordant couples is motivated by concerns about infection. However, it appears that this declines with time as they become comfortable with the use of PrEP. Counseling on need for consistent condoms use in addition to PrEP should be emphasized for couples who opt for PrEP in resource limited settings.
56 GBaud PAM-4 100 km Transmission System with Photonic Processing Schemes
Creators: name: Estébanez, Irene
name: Li, Shi
name: Schwind, Janek
name: Fischer, Ingo
name: Pachnicke, Stephan
name: Argyris, Apostolos
Publisher: name: arXiv
Year: 2021
Subjects: subject: Signal Processing (eess.SP)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Analog photonic computing has been proposed and tested in recent years as an alternative approach for data recovery in fiber transmission systems. Photonic reservoir computing, performing nonlinear transformations of the transmitted signals and exhibiting internal fading memory, has been found advantageous for this kind of processing. In this work, we show that the effectiveness of the internal fading memory depends significantly on the properties of the signal to be processed. Specifically, we demonstrate two experimental photonic post-processing schemes for a 56 GBaud PAM-4 experimental transmission system, with 100 km uncompensated standard single-mode fiber and direct detection. We show that, for transmission systems with significant chromatic dispersion, the contribution of a photonic reservoir's fading memory to the computational performance is limited. In a comparison between the data recovery performances between a reservoir computing and an extreme learning machine fiber-based configuration, we find that both offer equivalent data recovery. The extreme learning machine approach eliminates the necessity of external recurrent connectivity, which simplifies the system and increases the computation speed. Above 31 dB OSNR, the photonics-based equalization exhibits a lower BER than the respective offline DSP-based KK receiver.
Supplementary HTML & Large Excel Files - Chapter IB. In situ microbiome sequencing to inform targeted bioprospecting
Creators: name: Latorre-Pérez, Adriel
Publisher: name: Zenodo
Year: 2021
Subjects: Spaghetti, 16S rRNA gene sequencing, Tabernas Desert

description: Supplementary material of Adriel Latorre-Pérez's PhD thesis entitled "Optimizing Nanopore-based microbiome sequencing for characterizing biotechnologically-relevant ecosystems". This supplementary material is associated with Chapter IB, which content has been published in: Latorre-Pérez, A., Gimeno Valero, H., Tanner, K., Pascual, J., Vilanova, C., & Porcar, M. A round trip to the desert: in situ Nanopore sequencing informs targeted bioprospecting. Frontiers in Microbiology, 3777. Two different HTML and XLSX (Excel Format) files have been included since they cannot be properly integrated into the thesis: Supplementary Figure IB.S4. Barplot displaying the cumulative relative abundances (x axis) of the radiation- and desiccation-resistant genera. Supplementary File IB.S1. Raw Spaghetti output. See: https://github.com/adlape95/Spaghetti Supplementary Table IB.S2. Summary of the microbial culture collection. Only dereplicated strains have been included. Supplementary Table IB.S4. Full genus-level relative abundance table.
Distribution of carrier multiplication rates in CdSe and InAs nanocrystals
Creators: name: Rabani, Eran
name: Baer, Roi
Publisher: name: arXiv
Year: 2008
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The distribution of rates of carrier multiplication (CM) following photon absorption is calculated for semiconductor nanocrystals (NCs). The NC electronic structure is described using a screened pseudopotential method known to give reliable description of NC excitons. The rates of biexciton generation are calculated using the Fermi golden rule with all relevant Coulomb matrix elements, taking into account proper selection rules. In CdSe and InAs NCs we find a broad distribution biexciton generation rates depending strongly on the exciton energy and size of the NC. The process becomes inefficient for NC exceeding 3 nm in diameter in the photon energy range of 2-3 times the band gap.
description: 4 pages 3 fig
A Proximal Point Approach for Distributed System State Estimation
Creators: name: Fabris, Marco
name: Michieletto, Giulia
name: Cenedese, Angelo
Publisher: name: arXiv
Year: 2021
Subjects: subject: Systems and Control (eess.SY)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: System state estimation constitutes a key problem in several applications involving multi-agent system architectures. This rests upon the estimation of the state of each agent in the group, which is supposed to access only relative measurements w.r.t. some neighbors state. Exploiting the standard least-squares paradigm, the system state estimation task is faced in this work by deriving a distributed Proximal Point-based iterative scheme. This solution entails the emergence of interesting connections between the structural properties of the stochastic matrices describing the system dynamics and the convergence behavior toward the optimal estimate. A deep analysis of such relations is provided, jointly with a further discussion on the penalty parameter that characterizes the Proximal Point approach.
description: 6 pages, 2 figures, 1 table, manuscript n 3555, \c{opyright} 2020 the authors. This work has been accepted to IFAC for publication under a Creative Commons Licence CC-BY-NC-ND
Raman spectra of fine-grained materials from first principles
Creators: name: Popov, Maxim N.
name: Spitaler, Jürgen
name: Veerapandiyan, Vignaswaran K.
name: Bousquet, Eric
name: Hlinka, Jiri
name: Deluca, Marco
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: Raman spectroscopy is an advantageous method for studying the local structure of materials, but the interpretation of measured spectra is complicated by the presence of oblique phonons in polycrystals of polar materials. Whilst group theory considerations and standard ab initio calculations are helpful, they are often valid only for single crystals. In this paper, we introduce a method for computing Raman spectra of polycrystalline materials from first principles. We start from the standard approach based on the (Placzek) rotation invariants of the Raman tensors and extend it to include the effect of the coupling between the lattice vibrations and the induced electric field, and the electro-optic contribution, relevant for polar materials like ferroelectrics. As exemplified by applying the method to rhombohedral BaTiO3, AlN, and LiNbO3, such an extension brings the simulated Raman spectrum to a much better correspondence with the experimental one. Additional advantages of the method are that it is general, permits automation, and thus can be used in high-throughput fashion.
description: 23 pages, 4 figures
How glassy are orientational dynamics of rodlike molecules near the isotropic-nematic transition?
Creators: name: Jana, Biman
name: Chakrabarti, Dwaipayan
name: Bagchi, Biman
Publisher: name: arXiv
Year: 2007
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: In an attempt to quantitatively characterize the recently observed slow dynamics in the isotropic and nematic phase of liquid crystals, we investigate the single-particle orientational dynamics of rodlike molecules across the isotropic-nematic transition in computer simulations of a family of model systems of thermotropic liquid crystals. Several remarkable features of glassy dynamics are on display including non-exponential relaxation, dynamical heterogeneity, and non-Arrhenius temperature dependence of the orientational relaxation time. In order to obtain a quantitative measure of glassy dynamics in line with the estbalished methods in supercooled liquids, we construct a relaxation time versus scaled inverse temperature plot, and demonstrate that one can indeed define a 'fragility index' for thermotropic liquid crystals, that depends on density and aspect ratio. The values of the fragility parameter are surprisingly in the range one observed for glass forming liquids. A plausible correlation between the energy landscape features and the observed fragility is discussed.
description: 7 figures and 8 pages
QCD Prediction of $A_{TT}$ for Small $Q_T$ Dimuon Production in $pp$ and $p\bar{p} Collisions
Creators: name: Kawamura, Hiroyuki
name: Kodaira, Jiro
name: Tanaka, Kazuhiro
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We present QCD prediction of double-spin asymmetries ($A_{TT}$) in transversely polarized Drell-Yan process at small transverse momentum $Q_T$ of dimuon. Resummation of large logarithmic corrections, relevant in small $Q_T$ region, is performed up to next-to-leading logarithmic (NLL) accuracy. $A_{TT}$ at RHIC, J-PARC and GSI are studied numerically in the corresponding kinematic regions.We show that the large $A_{TT}$ is obtained for small $Q_T$ and moderate energies.
description: 4 pages, 2 figures. Talk presented at SPIN2006, October 2-7, 206, Kyoto, Japan
Sustaining Open Science Infrastructure: Lessons Learned (and Still Learning!) at ROR
Creators: name: Gould, Maria
Publisher: name: Zenodo
Year: 2021
Subjects: ROR
Persistent identifiers
Organization identifiers
Open infrastructure

description: The Research Organization Registry (ROR) launched in 2019 as the first open, community-driven registry of organization identifiers. ROR is charting a unique course in the scholarly communications landscape by pursuing a lean, collaborative, iterative approach to its resourcing, governance, and sustainability planning, while adopting the practices outlined in the Principles of Open Scholarly Infrastructure (POSI). In this lightning talk, we will discuss the lessons learned (and those we are still learning) from our first three years of operating ROR and setting it up for long-term stability. We will highlight strategies that have helped kickstart ROR’s growth and we will share the honest truth about some of the challenges we face in building and sustaining truly open scholarly infrastructure—and how we’re working to address these challenges. While ROR’s path is unique, the lessons we have learned will be relevant for other initiatives that are grappling with similar ideas, challenges, and goals.
Additional file 5 of A novel c.64G > T (p.G22C) NR5A1 variant in a Chinese adolescent with 46,XY disorders of sex development: a case report
Creators: name: Zhang, Dan
name: Wang, Dajia
name: Tong, Yajie
name: Li, Mingyu
name: Meng, Lingzhe
name: Song, Qiutong
name: Xin, Ying
Publisher: name: figshare
Year: 2023
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file 5: Supplementary Table 2. Prediction of the impact of the c.64G>T (p.G22C) NR5A1 variant.
String Excitation by Initial Singularity of Inflation
Creators: name: Nishii, Kanji
name: Yoshida, Daisuke
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We discuss excitation of string oscillation modes by an initial singularity of inflation. The initial singularity of inflation is known to occur with a finite Hubble parameter, which is generally lower than the string scale, and hence it is not clear that stringy effects become significant around it. With the help of Penrose limit, we find that infinitely heavy oscillation modes get excited when a singularity is strong in the sense of Krolak's classification. We demonstrate that the initial singularities of Starobinsky and hill top inflation, assuming the slow roll inflation to the past infinity, are strong. Hence stringy corrections are inevitable in the very early stage of these inflation models. We also find that the initial singularity of the hill top inflation could be weak for non-slow roll case.
description: 22 pages,3 figures, published version