cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Floating Phase in 2D ANNNI Model
Creators: name: Chandra, Anjan Kumar
name: Dasgupta, Subinay
Publisher: name: arXiv
Year: 2007
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We investigate whether the floating phase (where the correlation length is infinite and the spin-spin correlation decays algebraically with distance) exists in the temperature($T$) - frustration parameter ($κ$) phase diagram of 2D ANNNI model. To identify this phase, we look for the region where (i) finite size effect is prominent and (ii) some relevant physical quantity changes somewhat sharply and this change becomes sharper as the system size increases. For $κ< 0.5 $, the low temperature phase is ferromagnetic and we study energy and magnetization. For $κ> 0.5 $, the low temperature phase is antiphase and we study energy, layer magnetization, length of domain walls running along the direction of frustration, number of domain-intercepts that are of length 2 along the direction of frustration, and the number of domain walls that do not touch the upper and/or lower boundary. In agreement with some previous studies, our final conclusion is that, the floating phase exists, if at all, only along a line.
description: 9 pages, 17 figures
Spontaneous orbital magnetization of mesoscopic dipole dimers
Creators: name: Percebois, Gaëtan J.
name: Weinmann, Dietmar
name: Jalabert, Rodolfo A.
name: Weick, Guillaume
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Ensembles of gold nanoparticles present a magnetic behavior which is at odds with the weakly diamagnetic response of bulk gold. In particular, an unusual ferromagnetic order has been unveiled by several experiments. Here we investigate if the combined effect of orbital magnetism of conduction electrons and interparticle dipolar interaction can lead to magnetic ordering. Using different model systems of interacting mesoscopic magnetic dipoles, together with a microscopic description of the electron dynamics within the nanoparticles, we find that a spontaneous magnetic moment may arise in dimers of metallic nanoparticles when the latter are characterized by a large orbital paramagnetic susceptibility.
description: 13 pages, 10 figures
The Brain Imaging Data Structure (BIDS) extends beyond MRI
Creators: name: Brooks, Teon L
Publisher: name: Zenodo
Year: 2018
Subjects: Brain Imaging Data Structure
BIDS
neuroinformatics
tools
MEG
EEG
iEEG

description: Invited panel discussion on Findable, Accessible, Interoperable, Reusable (FAIR) Neuroscience. Here I presented extensions to the Brain Imaging Data Structure (BIDS) for MEG, EEG, and iEEG data. In the presentation, I walk through the specification, and tools for its implementation.
John Conolly and the historical interpretation of moral management
Creators: name: Wood, Laura Christine
Publisher: name: University of British Columbia
Year: 2010

description: A number of explanations have been offered to account for the development and decline of the movement to reform the care and treatment of the insane, which began in Britain in the late eighteenth century, and was to find its most complete expression in the system known as moral management. The traditional or internalist school argues firstly, that humanitarianism was the motivating force behind the changes in the treatment of insanity, and secondly, that conditions for the mad improved because of a growth of medical and scientific knowledge. These views of the reform of the treatment of insanity were challenged by Michel Foucault, and other revisionist historians who were affected by his insights. Andrew Scull has been a most influential member of this group. He viewed insanity reform as having grown out of a socio-political need to manage deviancy, which led physicians to appropriate a non-medical form of asylum management, known as moral treatment, and recast it as a medical therapeutic requiring medical expertise for its administration. This helped justify their attempt to make themselves indispensable in the care and treatment of insanity. Recently, Scull used this approach in analyzing the career of John Conolly, a well-known asylum doctor of mid-nineteenth-century Britain, who instituted, in a large public asylum, a form of moral management known as the non-restraint system. Scull described Conolly as an unsuccessful general practitioner who achieved renown and economic security because of his position as an asylum administrator, despite his earlier criticisms of asylum care. In this thesis, I have examined Conolly's writings on the theories and practices of moral management, as well as writings on those subjects by other important figures of late eighteenth- and nineteenth-century psychiatry. I have drawn on the work of Robert Castel, Roger Smith and Karl Figlio in order to demonstrate that the practices of moral managers like John Conolly are better understood in terms of a group of concepts— the schema of stimulated motion, predisposition, and hierarchy—which developed out of a combination of medical, social and philosophical influences which were themselves generated in an epistemological framework constituted around the general principle of organization. In addition, these concepts provided a rationale for regarding the theoretical and practical aspects of asylum medicine as integrated. This conceptual analysis helps explain Conolly's adoption of the practice of moral management. Thus, his role as advocate cannot be understood exclusively in Scull's terms, as an example of careerism, but is better understood as a practical corollary of existing psychiatric theory and practice.
title: Polyhedral domains for abstract interpretation in logic programming
Creators: name: Benoy, Patricia Mary
Publisher: name: University of Kent
Year: 2002

description: The motivations for program analyses are many. The impetus for the static analysis of programs initially ranged from the need for more efficient code to program transforms for parallel systems, but with the passage of time now also encompasses: providing the programmer with debugging information, program verification and program testing. Abstract interpretation is a methodology for static analysis that was formalised at the beginning of the last decade and is employed in both declarative and imperative programming paradigms. Abstract interpretation is a rigorous approximation technique that allows an analysis to focus on a particular property and infer useful information about the run time behaviour of the program being analysed. In order to implement an abstract interpretation it is necessary to chose an abstract domain that expresses the property of interest with sufficient precision to be useful. The focus of this thesis is on the use of two polyhedral domains as a means of capturing these properties of interest in logic programs. This thesis demonstrates how polyhedra can be employed to capture analyses that relate to dependency information with respect to some measure of size. Polyhedral analyses require a technique known as widening to ensure analysis convergence. Computational issues associated with widening prompted an investigation into the way linear spaces interact and how it is possible for a polyhedron to have different representations as a set of implicitly conjoined linear inequalities. Some useful computational insights are the outcome of this investigation. The observation that certain linear inequalities might represent dependency information prompted a novel approach to capturing dependency analysis with the subclass of polyhedra that can be represented by those linear inequalities. This could be advantageous for analyses in environments with constraint support as no set-up costs for the analysis would be incurred as the existing environment would be capable of supporting the abstract domain. Central to this thesis is the isomorphism that reveals the precise extent to which these polyhedra can represent dependency information. An argument-size analysis using polyhedra and a groundness analysis using certain polyhedral cones have been implemented up to the prototype stage.
Optical absorption of excimer laser-induced dichlorine monoxide in silica glass and excitation of singlet oxygen luminescence by energy transfer from chlorine molecules
Creators: name: Skuja, Linards
name: Ollier, Nadège
name: Kajihara, Koichi
name: Bite, Ivita
name: Leimane, Madara
name: Smits, Krisjanis
name: Silins, Andrejs
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: An optical absorption (OA) band of interstitial dichlorine monoxide molecules with peak at 4.7 eV and halfwidth 0.94 eV is identified in F2 laser - irradiated (photon energy=7.9 eV) synthetic silica glass bearing both interstitial O2 and Cl2 molecules. Alongside with intrinsic defects, this OA band can contribute to solarization of silica glasses produced from SiCl4. While the formation of ClClO is confirmed by its Raman signature, its structural isomer ClOCl may also contribute to this induced OA band. Thermal destruction of this band between 300C and 400C almost completely restores the pre-irradiation concentration of interstitial Cl2. An additional weak OA band at 3.5 eV is tentatively assigned to ClO2 molecules. The strongly forbidden 1272nm infrared luminescence band of excited singlet O2 molecules was observed at 3 eV-3.5 eV excitation, demonstrating an energy transfer process from photoexcited triplet Cl2 to O2. The energy transfer most likely occurs between Cl2 and O2 interstitial molecules located in neighboring nanosized interstitial voids in the structure of SiO2 glass network.
description: 25 manuscript pages, 9 figures, published 2021
Glyceridae Grube 1850
Creators: name: Ribas, Julia
name: Hutchings, Pat
Publisher: name: Zenodo
Year: 2015
Subjects: Biodiversity
Taxonomy
Animalia
Annelida
Polychaeta
Phyllodocida
Glyceridae

description: Family Glyceridae Grube, 1850   See Böggemann (2015, Zootaxa 4019).
description: Published as part of Ribas, Julia & Hutchings, Pat, 2015, Lizard Island Polychaete Workshop: sampling sites and a checklist of polychaetes, pp. 7-34 in Zootaxa 4019 (1) on page 26, DOI: 10.11646/zootaxa.4019.1.4, http://zenodo.org/record/289472
GaAs MESFETS and their applications in digital logic and digital to Analog conversion
Creators: name: Abdel-Motaleb, Ibrahim Mohamed
Publisher: name: University of British Columbia
Year: 2010

description: The purpose of the work described in this thesis was to study the use of GaAs MESFETs in digital logic and digital to analog conversion. A part of this work was to test ideas by actually fabricating GaAs MESFET devices in our laboratory by implanting Si into LEC SI GaAs. Initially, the Rockwell "ion implanted planar process" was used. With this process high source and drain resistance result when the magnitude of the threshold voltage is reduced. A recessed gate process was then tried in order to reduce the series resistance, but it was difficult to control in order to achieve an acceptable uniformity. Sadler's self-aligned gate technique was then tried but an acceptable yield was found to be hard to achieve. Based on the experience with the above methods, a Self Aligned Gate Technique Using Polyimide (SAGUPI) was developed. Using this technique it was found to be possible to reduce the series resistance of the transistor and achieve acceptable yields and uniformities. The characteristics of devices fabricated using the ion implanted planar process were measured. The transistor I-V characteristic parameters, Schottky and ohmic contact parameters and implanted region parameters were measured at room temperature and as a function of temperature over the range from -80°C to 80°C. It was found that no large change in the speed of the circuit occurs over this range. A new digital logic (the Common Drain FET Logic, CDFL) was developed for the application in Ultra High Speed Very Large Scale of Integration. The performance of the new logic was compared with that of other GaAs MESFET logic using computer simulation. The simulation results showed that the CDFL has potential for meeting the UHS VLSI requirements. Two 3 bit Digital to Analog Converters (DAC) (one with MESFETS as current sources and the other with saturated resistors) were developed. MESFETs gave better current source characteristics than saturated resistors.
A Method to Measure the Mass of Damped Ly-alpha Absorber Host Galaxies Using Fluctuations in 21cm Emission
Creators: name: Wyithe, Stuart
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Observations of damped Ly-alpha absorbers (DLA) indicate that the fraction of hydrogen in its neutral form (HI) is significant by mass at all redshifts. This gas represents the reservoir of material that is available for star formation at late times. As a result, observational identification of the systems in which this neutral hydrogen resides is an important missing ingredient in models of galaxy formation. Precise identification of DLA host mass via traditional clustering studies is not practical owing to the small numbers of known systems being spread across sparsely distributed sight lines. However following the completion of reionization, 21cm surface brightness fluctuations will be dominated by neutral hydrogen in DLAs. Observations of these fluctuations will measure the combined clustering signal from all DLAs within a large volume. We show that measurement of the spherically averaged power-spectrum of 21cm intensity fluctuations due to DLAs could be used to measure the galaxy bias for DLA host galaxies when combined with an independent measurement of the cosmological HI mass density from quasar absorption studies. Utilising this technique, the low frequency arrays now under construction could measure the characteristic DLA host mass with a statistical precision as low as 0.3 dex at z~4. In addition, high signal-to-noise observations of the peculiar-motion induced anisotropy of the power-spectrum would facilitate measurement of both the DLA host mass and the cosmic HI density directly from 21cm fluctuations. By exploiting this anisotropy, a second generation of low frequency arrays with an order of magnitude increase in collecting area could measure the values of cosmic HI density and DLA host mass, with uncertainties of a few percent and a few tens of percent respectively.
description: 10 pages, 6 figures. Submitted to MNRAS
Reduction of the Casimir force using aerogels
Creators: name: Esquivel-Sirvent, R.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: By using silicon oxide based aerogels we show numerically that the Casimir force can be reduced several orders of magnitude, making its effect negligible in nanodevices. This decrease in the Casimir force is also present even when the aerogels are deposited on metallic substrates. To calculate the Casimir force we model the dielectric function of silicon oxide aerogels using an effective medium dielectric function such as the Clausius-Mossotti approximation. The results show that both the porosity of the aerogel and its thickness can be use as control parameters to reduce the magnitude of the Casimir force.
description: to appear J. Appl. Phys
Strongly anisotropic spin dynamics in magnetic topological insulators
Creators: name: Alfonsov, A.
name: Facio, J. I.
name: Mehlawat, K.
name: Moghaddam, A. G.
name: Ray, R.
name: Zeugner, A.
name: Richter, M.
name: Brink, J. van den
name: Isaeva, A.
name: Büchner, B.
name: Kataev, V.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The recent discovery of magnetic topological insulators has opened new avenues to explore exotic states of matter that can emerge from the interplay between topological electronic states and magnetic degrees of freedom, be it ordered or strongly fluctuating. Motivated by the effects that the dynamics of the magnetic moments can have on the topological surface states, we investigate the magnetic fluctuations across the (MnBi$_{\text{2}}$Te$_{\text{4}}$)(Bi$_{\text{2}}$Te$_{\text{3}}$)$_{\text{n}}$ family. Our paramagnetic electron spin resonance experiments reveal contrasting Mn spin dynamics in different compounds, which manifests in a strongly anisotropic Mn spin relaxation in MnBi$_{\text{2}}$Te$_{\text{4}}$ while being almost isotropic in MnBi$_{\text{4}}$Te$_{\text{7}}$. Our density-functional calculations explain these striking observations in terms of the sensitivity of the local electronic structure to the Mn spin-orientation, and indicate that the anisotropy of the magnetic fluctuations can be controlled by the carrier density, which may directly affect the electronic topological surface states.
Hartle-Hawking state in the real-time formalism
Creators: name: Higuchi, Atsushi
name: Lima, William C. C.
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study self-interacting massive scalar field theory in static spacetimes with a bifurcate Killing horizon and a wedge reflection. In this theory the Hartle-Hawking state is defined to have the $N$-point correlation functions obtained by analytically continuing those in the Euclidean theory, whereas the double Kubo-Martin-Schwinger (KMS) state is the pure state invariant under the Killing flow and the wedge reflection which is regular on the bifurcate Killing horizon and reduces to the thermal state at the Hawking temperature in each of the two static regions. We demonstrate in the Schwinger-Keldysh operator formalism of perturbation theory the equivalence between the Hartle-Hawking state and the double KMS state with the Hawking temperature, which was shown before by Jacobson in the path-integral framework.
description: 20 pages and 2 figures. Discussions improved and typos corrected. Matches published version
Empirical formulae to describe some physical properties of small groups of protogalaxies with multiplicity
Creators: name: Arreaga-Garcia, Guillermo
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: By means of identical cubic elements, we generate a partition of a volume in which a particle-based cosmological simulation is carried out. In each cubic element, we determine the gas particles with a normalized density greater than an arbitrarily chosen density threshold. By using a proximity parameter, we calculate the neighboring cubic elements and generate a list of neighbors. By imposing dynamic conditions on the gas particles, we identify gas clumps and their neighbors, so that we calculate and fit some properties of the groups so identified, including the mass, size and velocity dispersion, in terms of their multiplicity (here defined simply as the number of member galaxies). Finally, we report the value of the ratio of kinetic energy to gravitational energy of such dense gas clumps, which will be useful as initial conditions in simulations of gravitational collapse of gas clouds and clusters of gas clouds.
description: Accepted for publication in Research in Astronomy and Astrophysics
Hbeta Profiles in Quasars: Evidence for an Intermediate-line Region
Creators: name: Hu, Chen
name: Wang, Jian-Min
name: Ho, Luis C.
name: Chen, Yan-Mei
name: Bian, Wei-Hao
name: Xue, Sui-Jian
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We report on a systematic investigation of the Hbeta and Fe II emission lines in a sample of 568 quasars within z < 0.8 selected from the Sloan Digital Sky Survey. The conventional broad Hbeta emission line can be decomposed into two components--one with intermediate velocity width and another with very broad width. The velocity shift and equivalent width of the intermediate-width component do not correlate with those of the very broad component of Hbeta, but its velocity shift and width do resemble Fe II. Moreover, the width of the very broad component is roughly 2.5 times that of the intermediate-width component. These characteristics strongly suggest the existence of an intermediate-line region, whose kinematics seem to be dominated by infall, located at the outer portion of the broad-line region.
description: 4 pages, 6 figures, Accepted for publication in ApJ (Letters) ; corrected typos, added references
title: Looking Through and Beyond Conflicts: Communal Violence and the Social Order in Hyderabad (India)
Creators: name: Mangiarotti, Emanuela
Publisher: name: Institute for Interdisciplinary Conflict and Violence Research, Bielefeld University
Year: 2019
Subjects: communalism, communal violence, caste, gender, socio-economic order, intersectionality

description: Communalism permeates the political, academic, media and everyday discourse in and about India. As a dominant interpretive framework, it expresses a particular politics of interfaith relations that normalises socio-political conflicts and violence intersecting with gender, class and caste relations. These intersections emerge in the experiences, practices and spaces of marginality and violence, revealing both the mechanisms of their normalisation in the context of communal violence and the experience of living within, through and despite it. Everyday life becomes the privileged context for reading communalism in light of a systematic reorganising of the gender-socio-economic governance, and the possibility to interrogate it. Based on an ethnographic study carried out in Hyderabad between 2009 and 2012, the paper reveals a politics of communal violence embedded in everyday social practices. It shows that the gender-socio-economic governance is not parallel to communalism but in fact constitutive of its logic and practices. The paper offers a perspective on how socio-political conflicts become actualised in a social order and how agency within such contexts unfolds as awareness of and action upon the space/possibility of their reconfiguration.
description: International Journal of Conflict and Violence (IJCV), Vol 13 (2019)
Goniadidae Kinberg 1865
Creators: name: Ribas, Julia
name: Hutchings, Pat
Publisher: name: Zenodo
Year: 2015
Subjects: Biodiversity
Taxonomy
Animalia
Annelida
Polychaeta
Phyllodocida
Goniadidae

description: Family Goniadidae Kinberg, 1865   See Böggemann (2015, Zootaxa 4019).
description: Published as part of Ribas, Julia & Hutchings, Pat, 2015, Lizard Island Polychaete Workshop: sampling sites and a checklist of polychaetes, pp. 7-34 in Zootaxa 4019 (1) on page 26, DOI: 10.11646/zootaxa.4019.1.4, http://zenodo.org/record/289472
UNVEILING THE CRUCIAL ROLE OF PROFESSIONAL COMPETENCE IN THE MODERN EDUCATION SYSTEM
Creators: name: Rajabova, Xurshida
Publisher: name: Zenodo
Year: 2023

description: In the rapidly evolving landscape of the 21st century, characterized by unprecedented technological advancements, globalization, and dynamic societal changes, the education system stands at the forefront of shaping the future. As we traverse this era of knowledge explosion, the importance of professional competence within the educational framework has never been more pronounced. This delves into the multifaceted dimensions of professional competence and its pivotal role in not only preparing students for the challenges of today but also equipping them with the adaptive skills necessary for an unpredictable tomorrow.
Maldanidae Malmgren 1867
Creators: name: Ribas, Julia
name: Hutchings, Pat
Publisher: name: Zenodo
Year: 2015
Subjects: Biodiversity
Taxonomy
Animalia
Annelida
Polychaeta
Maldanidae

description: Family Maldanidae Malmgren, 1867   Records. Lizard Island Surrounding Areas: North Direction Island (14°44′43′′S 145°30′18′′E) AM W.38623. Outer Barrier: Yonge Reef (14°34′22′′S 145°37′38′′E) AM W.41197.
 Comments. No published records from Lizard Island, although common in soft sediments (Hutchings, personal comment).
description: Published as part of Ribas, Julia & Hutchings, Pat, 2015, Lizard Island Polychaete Workshop: sampling sites and a checklist of polychaetes, pp. 7-34 in Zootaxa 4019 (1) on page 27, DOI: 10.11646/zootaxa.4019.1.4, http://zenodo.org/record/289472
Using a Neural Network Classifier to Select Galaxies with the Most Accurate Photometric Redshifts
Creators: name: Broussard, Adam
name: Gawiser, Eric
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The Vera C. Rubin Observatory Legacy Survey of Space and Time (LSST) will produce several billion photometric redshifts (photo-$z$'s), enabling cosmological analyses to select a subset of galaxies with the most accurate photo-$z$. We perform initial redshift fits on Subaru Strategic Program galaxies with deep $grizy$ photometry using Trees for Photo-Z (TPZ) before applying a custom neural network classifier (NNC) tuned to select galaxies with $(z_\mathrm{phot} - z_\mathrm{spec})/(1+z_\mathrm{spec}) < 0.10$. We consider four cases of training and test sets ranging from an idealized case to using data augmentation to increase the representation of dim galaxies in the training set. Selections made using the NNC yield significant further improvements in outlier fraction and photo-$z$ scatter ($σ_z$) over those made with typical photo-$z$ uncertainties. As an example, when selecting the best third of the galaxy sample, the NNC achieves a 35% improvement in outlier rate and a 23% improvement in $σ_z$ compared to using uncertainties from TPZ. For cosmology and galaxy evolution studies, this method can be tuned to retain a particular sample size or to achieve a desired photo-$z$ accuracy; our results show that it is possible to retain more than a third of an LSST-like galaxy sample while reducing $σ_z$ by a factor of two compared to the full sample, with one-fifth as many photo-$z$ outliers. For surveys like LSST that are not limited by shot noise, this method enables a larger number of tomographic redshift bins and hence a significant increase in the total signal-to-noise of galaxy angular power spectra.
description: 17 pages, 13 figures; Accepted to ApJ August 2021
Pressure-induced high-temperature superconductivity retained at ambient
Creators: name: Deng, Liangzi
name: Bontke, Trevor
name: Dahal, Rabin
name: Xie, Yu
name: Gao, Bin
name: Li, Xue
name: Yin, Ketao
name: Gooch, Melissa
name: Rolston, Donald
name: Chen, Tong
name: Wu, Zheng
name: Ma, Yanming
name: Dai, Pengcheng
name: Chu, Ching-Wu
Publisher: name: arXiv
Year: 2021
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: To raise the superconducting-transition temperature (Tc) has been the driving force for the long, sustained effort in superconductivity research. Recent progress in hydrides with Tcs up to 287 K under 267 GPa has heralded a new era of room-temperature superconductivity (RTS) with immense technological promise. Indeed, RTS has lifted the temperature barrier for the ubiquitous application of superconductivity. Unfortunately, formidable pressure is required to attain such high Tcs. The most effective relief to this impasse is to remove the pressure needed while retaining the pressure-induced Tc without pressure. Here we show such a possibility in the pure and doped high-temperature superconductor (HTS) FeSe by retaining, at ambient via pressure-quenching (PQ), its Tc up to 37 K (quadrupling that of a pristine FeSe) and other pressure-induced phases. We have also observed that some phases remain stable without pressure at up to 300 K and for at least 7 days. The observations are in qualitative agreement with our ab initio simulations using the solid-state nudged elastic band (SSNEB) method. We strongly believe that the PQ technique developed here can be adapted to the RTS hydrides and other materials of value with minimal effort.
description: 20 pages, 4 figures, 5 extended data figures
The Pyrat Bay Framework for Exoplanet Atmospheric Modeling: A Population Study of Hubble/WFC3 Transmission Spectra
Creators: name: Cubillos, Patricio E.
name: Blecic, Jasmina
Publisher: name: arXiv
Year: 2021
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: We present the open-source pyratbay framework for exoplanet atmospheric modeling, spectral synthesis, and Bayesian retrieval. The modular design of the code allows the users to generate atmospheric 1D parametric models of the temperature, abundances (in thermochemical equilibrium or constant-with-altitude), and altitude profiles in hydrostatic equilibrium; sample ExoMol and HITRAN line-by-line cross sections with custom resolving power and line-wing cutoff values; compute emission or transmission spectra considering cross sections from molecular line transitions, collision-induced absorption, Rayleigh scattering, gray clouds, and alkali resonance lines; and perform Markov chain Monte Carlo atmospheric retrievals for a given transit or eclipse dataset. We benchmarked the pyratbay framework by reproducing line-by-line cross-section sampling of ExoMol cross sections, producing transmission and emission spectra consistent with petitRADTRANS models, accurately retrieving the atmospheric properties of simulated transmission and emission observations generated with TauREx models, and closely reproducing Aura retrieval analyses of the space-based transmission spectrum of HD 209458b. Finally, we present a retrieval analysis of a population of transiting exoplanets, focusing on those observed in transmission with the HST WFC3/G141 grism. We found that this instrument alone can confidently identify when a dataset shows H2O-absorption features; however, it cannot distinguish whether a muted H2O feature is caused by clouds, high atmospheric metallicity, or low H2O abundance. Our results are consistent with previous retrieval analyses. The pyratbay code is available at PyPI (pip install pyratbay) and conda. The code is heavily documented (https://pyratbay.readthedocs.io) and tested to provide maximum accessibility to the community and long-term development stability.
description: Accepted for publication at MNRAS
Magelonidae
Creators: name: Ribas, Julia
name: Hutchings, Pat
Publisher: name: Zenodo
Year: 2015
Subjects: Biodiversity
Taxonomy
Animalia
Annelida
Polychaeta
Spionida
Magelonidae

description: Family Magelonidae  Some material of this family is lodged in the Australian Museum spirit collection but they have not been databased. No published records of the family from Lizard or GBR.
description: Published as part of Ribas, Julia & Hutchings, Pat, 2015, Lizard Island Polychaete Workshop: sampling sites and a checklist of polychaetes, pp. 7-34 in Zootaxa 4019 (1) on page 27, DOI: 10.11646/zootaxa.4019.1.4, http://zenodo.org/record/289472
Thermal Management in Large Data Centers: Security Threats and Mitigation
Creators: name: Saridou, Betty
name: Bendiab, Gueltoum
name: Shiaeles, Stavros N.
name: Papadopoulos, Basil K.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cryptography and Security (cs.CR)
subject: FOS: Computer and information sciences

description: Data centres are experiencing significant growth in their scale, especially, with the ever-increasing demand for cloud and IoT services. However, this rapid growth has raised numerous security issues and vulnerabilities; new types of strategic cyber-attacks are aimed at specific physical components of data centres that keep them operating. Attacks against temperature monitoring and cooling systems of data centres, also known as thermal attacks, can cause a complete meltdown and are generally considered difficult to address. In this paper, we focus on this issue by analysing the potential security threats to these systems and their impact on the overall data center safety and performance. We also present current thermal anomaly detection methods and their limitations. Finally, we propose a hybrid method that uses multi-variant anomaly detection to prevent thermal attacks, as well as a fuzzy-based health factor to enhance data center thermal awareness and security
description: 15 pages, 3 figures
Risk Assessment Algorithms Based On Recursive Neural Networks
Creators: name: De Lara, Alejandro Chinea Manrique
name: Parent, Michel
Publisher: name: arXiv
Year: 2007
Subjects: subject: Neural and Evolutionary Computing (cs.NE)
subject: FOS: Computer and information sciences

description: The assessment of highly-risky situations at road intersections have been recently revealed as an important research topic within the context of the automotive industry. In this paper we shall introduce a novel approach to compute risk functions by using a combination of a highly non-linear processing model in conjunction with a powerful information encoding procedure. Specifically, the elements of information either static or dynamic that appear in a road intersection scene are encoded by using directed positional acyclic labeled graphs. The risk assessment problem is then reformulated in terms of an inductive learning task carried out by a recursive neural network. Recursive neural networks are connectionist models capable of solving supervised and non-supervised learning problems represented by directed ordered acyclic graphs. The potential of this novel approach is demonstrated through well predefined scenarios. The major difference of our approach compared to others is expressed by the fact of learning the structure of the risk. Furthermore, the combination of a rich information encoding procedure with a generalized model of dynamical recurrent networks permit us, as we shall demonstrate, a sophisticated processing of information that we believe as being a first step for building future advanced intersection safety systems
Asymptotic quasinormal frequencies of different spin fields in $d$-dimensional spherically-symmetric black holes
Creators: name: Chen, Chun-Hung
name: Cho, Hing-Tong
name: Chrysostomou, Anna
name: Cornell, Alan S.
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: While Hod's conjecture is demonstrably restrictive, the link he observed between black hole (BH) area quantisation and the large overtone ($n$) limit of quasinormal frequencies (QNFs) motivated intense scrutiny of the regime, from which an improved understanding of asymptotic quasinormal frequencies (aQNFs) emerged. A further outcome was the development of the "monodromy technique", which exploits an anti-Stokes line analysis to extract physical solutions from the complex plane. Here, we use the monodromy technique to validate extant aQNF expressions for perturbations of integer spin, and provide new results for the aQNFs of half-integer spins within higher-dimensional Schwarzschild, Reissner-Nordström, and Schwarzschild (anti-)de Sitter BH spacetimes. Bar the Schwarzschild anti-de Sitter case, the spin-1/2 aQNFs are purely imaginary; the spin-3/2 aQNFs resemble spin-1/2 aQNFs in Schwarzschild and Schwarzschild de Sitter BHs, but match the gravitational perturbations for most others. Particularly for Schwarzschild, extremal Reissner-Nordström, and several Schwarzschild de Sitter cases, the application of $n \rightarrow \infty$ generally fixes $\mathbb{R}e \{ ω\}$ and allows for the unbounded growth of $\mathbb{I}m \{ ω\}$ in fixed quantities.
description: 50 pages, 7 figures, and 6 tables. Updates include minor formatting, added commentary in the conclusions, and a revision of the extremal Reissner-Nordstr\"om discussion (section II-C2, results changed in section IV-B). Figure 8 has been removed and figure 3 has been refined. To appear in Classical and Quantum Gravity (CQG)
Micronutrient supplementation affects transcriptional and epigenetic regulation of lipid metabolism in a dose-dependent manner
Creators: name: Saito, Takaya
name: Whatmore, Paul
name: Taylor, John F.
name: Fernandes, Jorge M.O.
name: Adam, Anne-Catrin
name: Tocher, Douglas R.
name: Espe, Marit
name: Skjærven, Kaja H.
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Biochemistry
subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Ecology
subject: 69999 Biological Sciences not elsewhere classified
subject: Developmental Biology
subject: Cancer
subject: Computational Biology

description: Micronutrients (vitamins and minerals) have been less well studied compared to macronutrients (fats, proteins, and carbohydrates) although they play important roles in growth, metabolism, and maintenance of tissues. Hence, there is growing interest to understand the influence of micronutrients across various aspects in nutritional research. In the last two decades, aquaculture feeds have been shifted to containing more plant-based materials to meet the increasing demand and maintain the sustainability in the industry. A recent whole life cycle feeding trial of Atlantic salmon (Salmo salar) with graded levels of micronutrient packages has concluded that the levels of several B-vitamins and microminerals need to be increased from the current recommendation levels for optimal growth and fish welfare when plant-based diets are used. Here, we show the effect of micronutrient supplementation on hepatic transcriptional and epigenetic regulation in a dose dependent manner. . Specifically, our aim is to reveal the mechanisms of altered cell metabolism, which results in improved growth performance by micronutrient surpluses, at gene expression and DNA methylation levels. Our results strongly indicate that micronutrient supplementation suppresses gene expression in lipid metabolism in a dose-dependent manner and broadly affects DNA methylation in cell-adhesion and cell-signalling. In particular, it increases DNA methylation levels on the acetyl-CoA carboxylase alpha promoter in a concentration-dependent manner, which further suggests that acetyl-CoA carboxylase alpha is an upstream epigenetic regulator controlling its downstream lipid biosynthesis activities. This study demonstrates a comprehensive analysis to reveal an important role of micronutrients in lipid metabolism through epigenetic control of gene expression.
Lenses In VoicE (LIVE): Searching for strong gravitational lenses in the VOICE@VST survey using Convolutional Neural Networks
Creators: name: Gentile, Fabrizio
name: Tortora, Crescenzo
name: Covone, Giovanni
name: Koopmans, Léon V. E.
name: Spiniello, Chiara
name: Fan, Zuhui
name: Li, Rui
name: Liu, Dezi
name: Napolitano, Nicola R.
name: Vaccari, Mattia
name: Fu, Liping
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: We present a sample of 16 likely strong gravitational lenses identified in the VST Optical Imaging of the CDFS and ES1 fields (VOICE survey) using Convolutional Neural Networks (CNNs). We train two different CNNs on composite images produced by superimposing simulated gravitational arcs on real Luminous Red Galaxies observed in VOICE. Specifically, the first CNN is trained on single-band images and more easily identifies systems with large Einstein radii, while the second one, trained on composite RGB images, is more accurate in retrieving systems with smaller Einstein radii. We apply both networks to real data from the VOICE survey, taking advantage of the high limiting magnitude (26.1 in the r-band) and low PSF FWHM (0.8" in the r-band) of this deep survey. We analyse $\sim21,200$ images with $mag_r<21.5$, identifying 257 lens candidates. To retrieve a high-confidence sample and to assess the accuracy of our technique, nine of the authors perform a visual inspection. Roughly 75% of the systems are classified as likely lenses by at least one of the authors. Finally, we assemble the LIVE sample (Lenses In VoicE) composed by the 16 systems passing the chosen grading threshold. Three of these candidates show likely lensing features when observed by the Hubble Space Telescope. This work represents a further confirmation of the ability of CNNs to inspect large samples of galaxies searching for gravitational lenses. These algorithms will be crucial to exploit the full scientific potential of forthcoming surveys with the Euclid satellite and the Vera Rubin Observatory
description: 15 pages, 12 figures, submitted to MNRAS
A tonal analysis of the First String Quartet, opus 37, by Karol Szymanowski
Creators: name: Cadrin, Paul
Publisher: name: University of British Columbia
Year: 2010

description: In 1917, at the peak of the most productive period of his creative life, the Polish composer Karol Szymanowski (1882-1937) undertook his First String Quartet in C, opus 37. Of the four movements originally planned, three were published in 1925. These three movements reflect important directions in the evolution of the composer's style: from a youthful fervor toward German late romanticism (First Movement), through Szymanowski’s discovery of French impressionism (Second Movement), to his most daring experiment with polytonality (Third Movement). The complexity of this work, particularly of its tonal-harmonic language, raises questions which this dissertation proposes to answer. In order to do this, a three-tiered approach is used. At a first level, the surface of the work in all its details is represented as a network of lines according to stated criteria of continuity. At a second level, the structurally decisive outer-voices are extracted and the verticalities providing the harmonic framework for linear motions identified. Finally, at a third level, the tonal-harmonic structure is represented through multilevelled Roman numeral designations, on the one hand; and, on the other, broad directions of motion encompassing major sections and entire movements are portrayed in outer-voice frameworks. Following a discussion of these methodological stages, each movement is analyzed in detail. A summary of significant principles of polytonality introduces a discussion of Szymanowski's application of these in the Third Movement. As a broad commentary on the composer's style and technique in the First Quartet, the final chapter examines particular procedures manifest in all three movements. Voice-leading graphs for the entire Quartet are appended.
title: Inconsistency and underdefinedness in Z specifications
Creators: name: Miarka, Ralph
Publisher: name: University of Kent
Year: 2002

description: Abstract In software engineering, formal methods are meant to capture the requirements of software yet to be built using notations based on logic and mathematics. The formal language Z is such a notation. It has been found that in large projects inconsistencies are inevitable. It is also said, however, that consistency is required for Z specifications to have any useful meaning. Thus, it seems, Z is not suitable for large projects. Inconsistencies are a fact of life. We are constantly challenged by inconsistencies and we are able to manage them in a useful manner. Logicians recognised this fact and developed so called paraconsistent logics to continue useful, non-trivial, reasoning in the presence of inconsistencies. Quasi-classical logic is one representative of these logics. It has been designed such that the logical connectives behave in a classical manner and that standard inference rules are valid. As such, users of logic, like software engineers, should find it easy to work with QCL. The aim of this work is to investigate the support that can be given to reason about inconsistent Z specifications using quasi-classical logic. Some of the paraconsistent logics provide an extra truth value which we use to handle underdefinedness in Z. It has been observed that it is sometimes useful to combine the guarded and precondition approach to allow the representation of both refusals and underspecification. This work contributes to the development of quasi-classical logic by providing a notion of strong logical equivalence, a method to reason about equality in QCL and a tableau-based theorem prover. The use of QCL to analyse Z specifications resulted in a refined notion of operation applicability. This also led to a revised refinement condition for applicability. Furthermore, we showed that QCL allows fewer but more useful inferences in the presence of inconsistency. Our work on handling underdefinedness in Z led to an improved schema representation combining the precondition and the guarded interpretation in Z. Our inspiration comes from a non-standard three-valued interpretation of operation applicability. Based on this semantics, we developed a schema calculus. Furthermore, we provide refinement rules based on the concept that refinement means reduction of underdefinedness. We also show that the refinement conditions extend the standard rules for both the guarded and precondition approach in Z.
Si and Fe depletion in Galactic star-forming regions observed by the Spitzer Space Telescope
Creators: name: Okada, Yoko
name: Onaka, Takashi
name: Miyata, Takashi
name: Okamoto, Yoshiko K.
name: Sakon, Itsuki
name: Shibai, Hiroshi
name: Takahashi, Hidenori
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We report the results of the mid-infrared spectroscopy of 14 Galactic star-forming regions with the high-resolution modules of the Infrared Spectrograph (IRS) on board the Spitzer Space Telescope. We detected [SiII] 35um, [FeII] 26um, and [FeIII] 23um as well as [SIII] 33um and H2 S(0) 28um emission lines. Using the intensity of [NII] 122um or 205um and [OI] 146um or 63um reported by previous observations in four regions, we derived the ionic abundance Si+/N+ and Fe+/N+ in the ionized gas and Si+/O0 and Fe+/O0 in the photodissociation gas. For all the targets, we derived the ionic abundance of Si+/S2+ and Fe2+/S2+ for the ionized gas. Based on photodissociation and HII region models the gas-phase Si and Fe abundance are suggested to be 3-100% and <8% of the solar abundance, respectively, for the ionized gas and 16-100% and 2-22% of the solar abundance, respectively, for the photodissociation region gas. Since the [FeII] 26um and [FeIII] 23um emissions are weak, the high sensitivity of the IRS enables to derive the gas-phase Fe abundance widely in star-forming regions. The derived gas-phase Si abundance is much larger than that in cool interstellar clouds and that of Fe. The present study indicates that 3-100% of Si atoms and <22% of Fe atoms are included in dust grains which are destroyed easily in HII regions, probably by the UV radiation. We discuss possible mechanisms to account for the observed trend; mantles which are photodesorbed by UV photons, organometallic complexes, or small grains.
description: 43 pages with 7 figures, accepted in Astrophysical Journal