cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
title: Spectroscopic evidence for interstellar ices in comet Hyakutake
Creators: name: Irvine, William M.
name: BockeleeMorvan, D
name: Lis, DC
name: Matthews, HE
name: Biver, N
name: Crovisier, J
name: Davies, JK
name: Dent, WRF
name: Gautier, D
name: Godfrey, PD
name: Keene, J
name: Lovell, AJ
name: Owen, TC
name: Phillips, TG
name: Rauer, H
name: Schloerb, FP
name: Senay, M
name: Young, K
Publisher: name: University of Massachusetts Amherst
Year: 1996
Subjects: subject: Astrophysics and Astronomy

description: The published version is located at http://www.nature.com/nature/journal/v383/n6599/abs/383418a0.html
description: VOLATILE compounds in comets are the most pristine materials surviving from the time of formation of the Solar System, and thus potentially provide information about conditions that prevailed in the primitive solar nebula1–3. Moreover, comets may have supplied a substantial fraction of the volatiles on the terrestrial planets, perhaps including organic compounds that played a role in the origin of life on Earth4–6. Here we report the detection of hydrogen isocyanide (HNC) in comet Hyakutake. The abundance of HNC relative to hydrogen cyanide (HCN) is very similar to that observed in quiescent interstellar molecular clouds, and quite different from the equilibrium ratio expected in the outermost solar nebula, where comets are thought to form. Such a departure from equilibrium has long been considered a hallmark of gas-phase chemical processing in the interstellar medium7, suggesting that interstellar gases have been incorporated into the comet's nucleus, perhaps as ices frozen onto interstellar grains. If this interpretation is correct, our results should provide constraints on the temperature of the solar nebula, and the subsequent chemical processes that occurred in the region where comets formed.
Sparse Nonparametric Density Estimation in High Dimensions Using the Rodeo
Creators: name: Liu, Han
name: Lafferty, John D.
name: Wasserman, Larry
Publisher: name: Carnegie Mellon University
Year: 1994
Subjects: subject: 89999 Information and Computing Sciences not elsewhere classified
subject: FOS: Computer and information sciences

description: We consider the problem of estimating the joint density of a d-dimensional random vector X = (X1,X2, ...,Xd) when d is large. We assume that the density is a product of a parametric component and a nonparametric component which depends on an unknown subset of the variables. Using a modification of a recently developed nonparametric regression framework called rodeo (regularization of derivative expectation operator), we propose a method to greedily select bandwidths in a kernel density estimate. It is shown empirically that the density rodeo works well even for very high dimensional problems. When the unknown density function satisfies a suit- ably defined sparsity condition, and the para- metric baseline density is smooth, the approach is shown to achieve near optimal minimax rates of convergence, and thus avoids the curse of dimensionality.
Gauge Theory for Spectral Triples and the Unbounded Kasparov Product
Creators: name: Brain, Simon
name: Mesland, Bram
name: van Suijlekom, Walter D.
Publisher: name: arXiv
Year: 2013
Subjects: subject: K-Theory and Homology (math.KT)
subject: Mathematical Physics (math-ph)
subject: Operator Algebras (math.OA)
subject: Quantum Algebra (math.QA)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: We explore factorizations of noncommutative Riemannian spin geometries over commutative base manifolds in unbounded KK-theory. After setting up the general formalism of unbounded KK-theory and improving upon the construction of internal products, we arrive at a natural bundle-theoretic formulation of gauge theories arising from spectral triples. We find that the unitary group of a given noncommutative spectral triple arises as the group of endomorphisms of a certain Hilbert bundle; the inner fluctuations split in terms of connections on, and endomorphisms of, this Hilbert bundle. Moreover, we introduce an extended gauge group of unitary endomorphisms and a corresponding notion of gauge fields. We work out several examples in full detail, to wit Yang--Mills theory, the noncommutative torus and the $θ$-deformed Hopf fibration over the two-sphere.
description: 50 pages. Accepted version. Section 2 has been rewritten. Results in sections 3-6 are unchanged
title: Experiential but not expressive negative symptoms are associated with social cognition and functioning in schizophrenia –findings of a preliminary study with rehabilitation inpatients and Clinical Research Portfolio
Creators: name: Kondol, Anna
Publisher: name: University of Glasgow
Year: 2019
Subjects: subject: Psychosis, theory of mind, feasibility, negative symptoms.

description: Background: Functional disability represents a significant barrier to recovery in people with schizophrenia, often impacting those in in-patient rehabilitation to the greatest extent. There is evidence that social cognition is an important predictor of functional outcomes but the relationship between social cognition and functioning and other key variables such as symptoms remain unclear. Previous research has examined negative symptoms as a unitary construct. This study aims to clarify whether there is a differential association between experiential and expressive symptoms, functioning and social cognition, and whether experiential negative symptoms mediate a relationship between social cognition and functioning. Methods: 11 participants with schizophrenia or schizoaffective disorder were recruited. Participants were administered a battery of cognitive, social cognition and symptoms measures and an observer rated measure of functioning was completed with a named nurse. Results:. Due to the sample size obtained, data was visually examined and Spearman’s Rho correlations used to estimate effect sizes of linear relationships.. Higher levels of experiential but not expressive negative symptoms appeared to be associated with poorer social cognitive ability and worse functioning.. Due to recruitment challenges, post-hoc exploration of recruitment feasibility was conducted which demonstrated that recruitment figures were poor with only 33% of eligible patients participating. Ward turnover rates were low and indicate long recruitment periods to be necessary to recruit adequate samples Discussion and conclusion: The small sample reflects the difficulty of testing predictors of functioning in people who, by definition, do not readily engage in everyday roles. With acknowledgement of the limited generalisability, these preliminary data suggest a differential association between experiential and expressive negative symptoms and their relationship to functioning and social cognition. This highlights the importance of motivational constructs in determining functioning and may be a potential pathway from social cognition to functioning. Suggestions are made to address the low recruitment rates and increase participation.
Metadynamics for Training Neural Network Model Chemistries: a Competitive Assessment
Creators: name: Herr, John E.
name: Yao, Kun
name: McIntyre, Ryker
name: Toth, David
name: Parkhill, John
Publisher: name: arXiv
Year: 2017
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: Computational Physics (physics.comp-ph)
subject: Machine Learning (stat.ML)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Neural network (NN) model chemistries (MCs) promise to facilitate the accurate exploration of chemical space and simulation of large reactive systems. One important path to improving these models is to add layers of physical detail, especially long-range forces. At short range, however, these models are data driven and data limited. Little is systematically known about how data should be sampled, and `test data' chosen randomly from some sampling techniques can provide poor information about generality. If the sampling method is narrow `test error' can appear encouragingly tiny while the model fails catastrophically elsewhere. In this manuscript we competitively evaluate two common sampling methods: molecular dynamics (MD), normal-mode sampling (NMS) and one uncommon alternative, Metadynamics (MetaMD), for preparing training geometries. We show that MD is an inefficient sampling method in the sense that additional samples do not improve generality. We also show MetaMD is easily implemented in any NNMC software package with cost that scales linearly with the number of atoms in a sample molecule. MetaMD is a black-box way to ensure samples always reach out to new regions of chemical space, while remaining relevant to chemistry near $k_bT$. It is one cheap tool to address the issue of generalization.
title: Community stadia: A sustainable phenomenon?
Creators: name: McTier, Alexander John
Publisher: name: University of Glasgow
Year: 2019
Subjects: subject: Stadia, stadium, community, economic development, urban regeneration.

description: Influenced by urban entrepreneurial economic development policy, new professional sports stadia have been widely advanced as flagship developments that can generate jobs and wealth, support place branding and culture-led strategies, and host mega-events that collectively boost the economic competitiveness of their towns and cities. Public funding for stadia developments has been secured on these bases but also increasingly challenged as stadia costs are under-estimated and the benefits, particularly for lower income communities, exaggerated. Responding to these criticisms and with greater policy attention on establishing sustainable communities, the social and community benefits of new stadia developments have increasingly been promoted to secure and justify public investment. In the UK, community stadia have emerged in this context. Community stadia are an intriguing phenomenon as, in theory, they enable professional sports stadia to deliver on community aims alongside their core sporting and commercial demands and the economic development aims stemming from their flagship development status. Public funding has followed with a number of community stadia built or planned; this despite the limited critical analysis of the stadium type and its impact. It is this gap in the literature that this research addresses, doing so through a critical realist, case study methodology of two community stadia: The Keepmoat Stadium, Doncaster and The Falkirk Stadium, Falkirk. Specifically the research draws on the community-related literature and interviews with diverse stadia stakeholders to define community stadia by conceptualising the factors that characterise or influence community stadia, understand what communities they engage with and benefit, and critique whether they are a sustainable phenomenon that can genuinely deliver on sporting, commercial, community and economic development aims. The research finds that community stadia have the potential to deliver across these four aims, with stadia’s association with the world of professional sport facilitating engagement with multiple, diverse and ‘hard to reach’ communities. However, they are also complex phenomena that require imaginative but effective design, planning, governance and operational management. Indeed, civic leaders and stadia officials need to be attuned to the concepts of inclusive design, co-production, and space and place; as well as having a diverse skill set spanning community engagement and partnership working to entrepreneurial and marketing skills.
First-principles predicted low-energy structures of NaSc(BH4)4
Creators: name: Huan, Tran Doan
name: Amsler, Maximilian
name: Botti, Silvana
name: Marques, Miguel A. L.
name: Goedecker, Stefan
Publisher: name: arXiv
Year: 2013
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: According to previous interpretations of experimental data, sodium-scandium double-cation borohydride NaSc(BH$_4$)$_4$ crystallizes in the crystallographic space group $Cmcm$ where each sodium (scandium) atom is surrounded by six scandium (sodium) atoms. A careful investigation of this phase based on \textit{ab initio} calculations indicates that the structure is dynamically unstable and gives rise to an energetically and dynamically more favorable phase with $C222_1$ symmetry and nearly identical x-ray diffraction pattern. By additionally performing extensive structural searches with the minima-hopping method we discover a class of new low-energy structures exhibiting a novel structural motif in which each sodium (scandium) atom is surrounded by four scandium (sodium) atoms arranged at the corners of either a rectangle with nearly equal sides or a tetrahedron. These new phases are all predicted to be insulators with band gaps of $7.9-8.2$ eV. Finally, we estimate the influence of these structures on the hydrogen-storage performance of NaSc(BH$_4$)$_4$.
description: Version published
Sparse Gaussian Conditional Random Fields: Algorithms, Theory, and Application to Energy Forecasting
Creators: name: Wytock, Matt
name: J. Zico  Kolter
Publisher: name: Carnegie Mellon University
Year: 2007
Subjects: subject: 89999 Information and Computing Sciences not elsewhere classified
subject: FOS: Computer and information sciences

description: This paper considers the sparse Gaussian conditional random field, a discriminative extension of sparse inverse covariance estimation, where we use convex methods to learn a high-dimensional conditional distribution of outputs given inputs. The model has been proposed by multiple researchers within the past year, yet previous papers have been substantially limited in their analysis of the method and in the ability to solve large-scale problems. In this paper, we make three contributions: 1) we develop a second-order active-set method which is several orders of magnitude faster that previously proposed optimization approaches for this problem 2) we analyze the model from a theoretical standpoint, improving upon past bounds with convergence rates that depend logarithmically on the data dimension, and 3) we apply the method to large-scale energy forecasting problems, demonstrating state-of-the-art performance on two real-world tasks.
All-dielectric resonant metasurfaces with a strong toroidal response
Creators: name: Tuz, Vladimir R.
name: Khardikov, Vyacheslav V.
name: Kivshar, Yuri S.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We demonstrate how to create all-dielectric metasurfaces with a strong toroidal response by arranging two types of nanodisks into asymmetric quadrumer clusters. We demonstrate that a strong axial toroidal response of the metasurface is related to conditions of the trapped (dark) mode that is excited due the symmetry breaking in the cluster. We study the correlation between the toroidal response and asymmetry in the metasurface and nanocluster geometries, which appears from the different diameters of nanodisks or notches introduced into the nanodisks.
description: 17 pages, 6 figures
Chiral Brownian heat pump
Creators: name: Broek, M. van den
name: Broeck, C. Van den
Publisher: name: arXiv
Year: 2007
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We present the exact analysis of a chiral Brownian motor and heat pump. Optimization of the construction predicts, for a nanoscale device, frequencies of the order of kHz and cooling rates of the order of femtojoule per second.
description: Submitted to Phys. Rev. Lett
ACT-21-011 (2).pdf
Creators: name: abduldaim, mahir
Publisher: name: figshare
Year: 2021
Subjects: subject: 110303 Clinical Microbiology
subject: FOS: Clinical medicine
subject: 111502 Clinical Pharmacology and Therapeutics
subject: 110804 Medical Virology
subject: FOS: Health sciences

description: A double blind, randomized, placebo-controlled study to evaluate efficacy and safety of “ViraCide” in the management of Corona Virus Disease 2019 (COVID-19)
RCT conducted at 2 hospitals in India, recruiting 118 patients with PCR confirmed Covid-19 infection.
Can Density Matrix Embedding Theory with the Complete Activate Space Self-Consistent Field Solver Describe Single and Double Bond Breaking in Molecular Systems?
Creators: name: Pham, Hung Q.
name: Bernales, Varinia
name: Gagliardi, Laura
Publisher: name: arXiv
Year: 2017
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: Density matrix embedding theory (DMET) [Phys. Rev. Lett.2012, 109, 186404] has been demonstrated as an efficient wave-function-based embedding method to treat extended systems. Despite its success in many quantum lattice models, the extension of DMET to real chemical systems has been tested only on selected cases. Herein, we introduce the use of the complete active space self-consistent field (CASSCF) method as a correlated impurity solver for DMET, leading to a method called CAS-DMET. We test its performance in describing the dissociation of a H-H single bond in a H10 ring model system and an N=N double bond in azomethane (CH3-N=N-CH3) and pentyldiazene (CH3(CH2)4-N=NH). We find that the performance of CAS-DMET is comparable to CASSCF with different active space choices when single-embedding DMET corresponding to only one embedding problem for the system is used. When multiple embedding problems are used for the system, the CAS-DMET is in a good agreement with CASSCF for the geometries around the equilibrium, but not in equal agreement at bond dissociation.
description: 28 pages, 9 figures, TOC graphic
Le Rouillé, Guillaume, Le Grant coustumier du pays et duché de Normendie, 1534
Creators: name: Le Rouillé, Guillaume
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2019

description: Source: https://gallica.bnf.fr/ark:/12148/bpt6k9107313w
description: Relation: vignette : https://www.nakala.fr/data/11280/0894e787
Sparse Additive Models
Creators: name: Ravikumar, Pradeep
name: Lafferty, John
name: Liu, Han
name: Wasserman, Larry
Publisher: name: Carnegie Mellon University
Year: 1972
Subjects: subject: 89999 Information and Computing Sciences not elsewhere classified
subject: FOS: Computer and information sciences

description: We present a new class of methods for high dimensional non-parametric regression and classification called sparse additive models. Our methods combine ideas from sparse linear modelling and additive non-parametric regression. We derive an algorithm for fitting the models that is practical and effective even when the number of covariates is larger than the sample size. Sparse additive models are essentially a functional version of the grouped lasso of Yuan and Lin. They are also closely related to the COSSO model of Lin and Zhang but decouple smoothing and sparsity, enabling the use of arbitrary non-parametric smoothers. We give an analysis of the theoretical properties of sparse additive models and present empirical results on synthetic and real data, showing that they can be effective in fitting sparse non-parametric models in high dimensional data.
Impurity effects on the band structure of one-dimensional photonic crystals: Experiment and theory
Creators: name: Luna-Acosta, G. A.
name: Schanze, H.
name: Kuhl, U.
name: Stoeckmann, H. -J.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Optics (physics.optics)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We study the effects of single impurities on the transmission in microwave realizations of the photonic Kronig-Penney model, consisting of arrays of Teflon pieces alternating with air spacings in a microwave guide. As only the first propagating mode is considered, the system is essentially one dimensional obeying the Helmholtz equation. We derive analytical closed form expressions from which the band structure, frequency of defect modes, and band profiles can be determined. These agree very well with experimental data for all types of single defects considered (e.g. interstitial, substitutional) and shows that our experimental set-up serves to explore some of the phenomena occurring in more sophisticated experiments. Conversely, based on the understanding provided by our formulas, information about the unknown impurity can be determined by simply observing certain features in the experimental data for the transmission. Further, our results are directly applicable to the closely related quantum 1D Kronig-Penney model.
description: 16 pages, 7 figures
SpAM: Sparse Additive Models
Creators: name: Ravikumar, Pradeep
name: Liu, Han
name: Lafferty, John
name: Wasserman, Larry
Publisher: name: Carnegie Mellon University
Year: 2005
Subjects: subject: 89999 Information and Computing Sciences not elsewhere classified
subject: FOS: Computer and information sciences

description: We present a new class of models for high-dimensional nonparametric regression and classification called sparse additive models (SpAM). Our methods combine ideas from sparse linear modeling and additive nonparametric regression. We derive a method for fitting the models that is effective even when the number of covariates is larger than the sample size. A statistical analysis of the properties of SpAM is given together with empirical results on synthetic and real data, showing that SpAM can be effective in fitting sparse nonparametric models in high dimensional data.
New PARSEC database of alpha-enhanced stellar evolutionary tracks and isochrones I. Calibration with 47 Tuc (NGC104) and the improvement on RGB bump
Creators: name: Fu, Xiaoting
name: Bressan, Alessandro
name: Marigo, Paola
name: Girardi, Leo
name: Montalban, Josefina
name: Chen, Yang
name: Nanni, Ambra
Publisher: name: arXiv
Year: 2018
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Precise studies on the Galactic bulge, globular cluster, Galactic halo and Galactic thick disk require stellar models with alpha enhancement and various values of helium content. These models are also important for extra-Galactic population synthesis studies. For this purpose, we complement the existing PARSEC models, which are based on the solar partition of heavy elements, with alpha-enhanced partitions. We collect detailed measurements on the metal mixture and helium abundance for the two populations of 47 Tuc (NGC 104) from the literature, and calculate stellar tracks and isochrones with these alpha-enhanced compositions. By fitting the precise color-magnitude diagram with HST ACS/WFC data, from low main sequence till horizontal branch, we calibrate some free parameters that are important for the evolution of low mass stars like the mixing at the bottom of the convective envelope. This new calibration significantly improves the prediction of the RGB bump brightness. Comparison with the observed RGB and HB luminosity functions also shows that the evolutionary lifetimes are correctly predicted. As a further result of this calibration process, we derive the age, distance modulus, reddening, and the red giant branch mass loss for 47 Tuc. We apply the new calibration and alpha-enhanced mixtures of the two 47 Tuc populations ( [alpha/Fe] ~0.4 and 0.2) to other metallicities. The new models reproduce the RGB bump observations much better than previous models. This new PARSEC database, with the newly updated alpha-enhanced stellar evolutionary tracks and isochrones, will also be part of the new stellar products for Gaia.
description: accepted by MNRAS
title: ADCO, Cartulaire général de Cîteaux, dit de Jean de Cirey, (XVe siècle), tome V, Cart. 189 (11 H 74), 316 folios, f. 0015r
Creators: name: de la Côte d'Or, Archives départementales
name: Archives Départementales De La Côte-D'Or
name: Petot, Frédérique
name: Projet CBMA
name: CG21/F.PETOT/2012
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2020
Subjects: subject: LaMOP
subject: Laboratoire de Médiévistique Occidentale de Paris
subject: Corpus Burgundiae Medii Aevi
subject: Chartes de la Bourgogne du Moyen Âge
subject: cartulaire

description: Cartulaire général de Cîteaux, dit de Jean de Cirey, (XVe siècle), tome V, Archives départementales de la Côte-d'Or, Cart. 189 (11 H 74), 316 folios, f. 0015r, Numérisation en mode image.
description: Relation: http://www.cbma-project.eu/
description: Bibliographic citation: Cartulaire général de Cîteaux, dit de Jean de Cirey, (XVe siècle), tome V, Archives départementales de la Côte-d'Or, Cart. 189 (11 H 74), 316 folios, f. 0015r, in Projet CBMA - Corpus Burgundiae Medii Aevi [Ressource en ligne], https:// manuscrits.cbma-project.eu/
description: Provenance: abbaye de Cîteaux
description: Provenance: http://www.wikidata.org/entity/Q843261
description: Provenance: https://www.geonames.org/3024876
description: Provenance: http://www.idref.fr/030974844/id
description: Provenance: https://catalogue.bnf.fr/ark:/12148/cb12228351v
The low-dimensional structures formed by tricategories
Creators: name: Garner, Richard
name: Gurski, Nick
Publisher: name: arXiv
Year: 2007
Subjects: subject: Category Theory (math.CT)
subject: FOS: Mathematics
subject: 18D05, 18D20

description: We form tricategories and the homomorphisms between them into a bicategory, whose 2-cells are certain degenerate tritransformations. We then enrich this bicategory into an example of a three-dimensional structure called a locally cubical bicategory, this being a bicategory enriched in the monoidal 2-category of pseudo double categories. Finally, we show that every sufficiently well-behaved locally cubical bicategory gives rise to a tricategory, and thereby deduce the existence of a tricategory of tricategories.
description: 41 pages; v2: final journal version
title: 03_0420
Creators: name: Wesley Baldwin, John
name: Baldwin, John W.
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2018
Subjects: subject: LaMOP
subject: Laboratoire de Médiévistique Occidentale de Paris

description: L'ensemble de ces notes ont été crée par John Baldwin lors d'une de ses premières périodes de résidence à Paris. Ces documents comprennent tous les magistri qu’il avait pu rencontrer dans ses sources. Aux XIIème et XIIIème siècles, les universités n'existant pas encore, le titre de magister s'il évoque certainement une compétence n'est pas rattaché de façon systématique au passage par les écoles. De surcroît, les magistris sont le plus souvent désignés par leur seul prénom. La lecture de ces données est donc difficile et suppose un long travail pour tenter d'identifier un individu auquel on pourrait rattacher plusieurs mentions. John Baldwin avait donc renoncé à utiliser ces données pour donner un prolongement à sa magnifique étude sur les gradués d'université et leur emploi par les Capétiens et les Plantagenêts. Néanmoins, il a conservé ces données et elles sont potentiellement très utile dans le cadre de Studium, comme le sont toutes les mentions dans les volumes des Fasti Ecclesiae Gallicanae de chanoines portant ce titre de magister sans autres précisions. L'ampleur des dépouillements rend ces données très utiles et nous devons une grande reconnaissance à John Baldwin pour avoir pris la peine de faire photocopier ses fiches et de nous les avoir transmises amicalement.
Les données ainsi que les images des fiches sont accessibles sur le site Internet à l'adresse suivante : http://studium-baldwin.lamop.fr/.
Les transcriptions des fiches ont été effectuées par des étudiants de Paris 1 Panthéon - Sorbonne mais elles n'ont pas été corrigées par la suite.
description: Relation: https://lamop.hypotheses.org/
Modeling off-resonant nonlinear-optical cascading in mesoscopic thin films and guest-host molecular systems
Creators: name: Dawson, Nathan J.
name: Andrews, James H.
name: Crescimanno, Michael
Publisher: name: arXiv
Year: 2013
Subjects: subject: Optics (physics.optics)
subject: Atomic and Molecular Clusters (physics.atm-clus)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: A model for off-resonant microscopic cascading of (hyper)polarizabilities is developed using a self-consistent field approach to study mesoscopic systems of nonlinear polarizable atoms and molecules. We find enhancements in the higher-order susceptibilities resulting from geometrical and boundary orientation effects. We include an example of the dependence on excitation beam cross sectional structure and a simplified derivation of the microscopic cascading of the nonlinear optical response in guest-host systems.
description: 2 figures, 1 table
Capturing Relic Neutrinos with beta-decaying nuclei
Creators: name: Cocco, Alfredo G.
name: Mangano, Gianpiero
name: Messina, Marcello
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We summarize a novel approach which has been recently proposed for direct detection of low energy neutrino backgrounds such as the cosmological relic neutrinos, exploiting neutrino/antineutrino capture on nuclei that spontaneously undergo beta decay.
description: Talk given by G. Mangano at TAUP2007 Conference, Sendai, Japan, September 2007
Enhanced nanosecond electro-optic effect in isotropic and nematic phases of dielectrically negative nematics doped by strongly polar additive
Creators: name: Li, Bing-Xiang
name: Borshch, Volodymyr
name: Wang, Hao
name: Li, Quan
name: Shiyanovskii, Sergij V.
name: Lavrentovich, Oleg D.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: An electric field can induce or modify optical birefringence in both the isotropic and nematic phases of liquid crystals (LCs). In the isotropic phase, the electric field induces birefringence with an optical axis along the field. The phenomenon is known as the Kerr effect. In the nematic, the analog of the Kerr effect is the change of existing birefringence through nanosecond electric modification of order parameters (NEMOP) that does not require realignment of the optic axis. The utility of both effects for practical applications is challenged by a relatively weak birefringence induced by the field. We address the issue by adding a non-mesogenic additive 2, 3-dicyano-4-pentyloxyphenyl 4'-pentyloxybenzoate (DPP) with a large transverse dipole moment to mesogenic materials in order to enhance their negative dielectric anisotropy. The DPP doping substantially increases the field-induced birefringence in both NEMOP and Kerr effects, up to 0.02. The doping also slows down the switching processes, but this effect can be compensated by rising working temperatures, if necessary. The enhancement of field induced birefringence by the non-mesogenic dopant paves the way for practical applications of nanosecond electro-optic effects.
title: A comparison of the content and nature of worries of young people with and without autism spectrum disorder as they transition out of school
Creators: name: Waldman, Jack
Publisher: name: University of Glasgow
Year: 2019
Subjects: subject: Worry, autism, anxiety, rumination, distress, transition, school.

description: Background: Transition from secondary school is an essential time in development. For adolescents with Autism Spectrum Disorders (ASD) it can be particularly challenging, with studies highlighting low employment rates, reduced participation in further education, and higher levels of isolation. Previous research has shown that worries held by adolescents with intellectual disabilities (ID) differ from their non-ID peers. However, the worries of adolescents with autism are under-researched. This project aimed to explore the content and impact of worries of young people with autism at the stage of transition from school. Methods: Twenty-two participants with ASD and twenty-two participants without ASD, aged 16 to 18, were recruited from mainstream schools in the Scottish Highlands. Participants completed a ‘Worry Interview’; a semi-structured interview modified from a previous study investigating worries in young people with IDs. The participants’ levels of rumination and distress about their most salient worries were measured. An anxiety scale was also completed. Results: Content analysis highlighted differences between the two groups’ worries. Participants with ASD were more concerned about change and friendship, whereas those without ASD had more salient worries about subjects like work and money. The ASD group were significantly more distressed by their worries, and were also significantly more anxious than the control group. Conclusions: Key differences in the nature of worries between the two groups were highlighted. Consideration should be given to the specific concerns of pupils as they approach leaving school. This could ease the transition process by reducing anxiety and distress.
On the Stability of D7 - anti-D7 Probes in Near-conformal Backgrounds
Creators: name: Anguelova, Lilia
name: Suranyi, Peter
name: Wijewardhana, L. C. Rohana
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We investigate the perturbative stability of a nonsupersymmetric D7 - anti-D7 brane embedding in a particular class of type IIB backgrounds. These backgrounds are the gravitational duals of certain strongly-coupled gauge theories, that exhibit a nearly conformal regime (known as a walking regime). Previous studies in the literature have led to conflicting results as to whether the spectrum of fluctuations around the flavor D7 - anti-D7 embedding has a tachyonic mode or not. Here we reconsider the problem with a new analytical method and recover the previously obtained numerical results. We also point out that the earlier treatments relied on a coordinate system, in which it was not possible to take into account fluctuations of the point of confluence of the D7 - anti-D7 branes. Using an improved coordinate system, we confirm the presence of a normalizable tachyonic mode in this model, in agreement with the numerical calculations. Finally, we comment on the possibility of turning on worldvolume flux to stabilize the probe branes configuration.
description: 22 pages; explanations added, minor typos corrected, journal version
Atomic Layer MoS2-Graphene van der Waals Heterostructure Nanomechanical Resonators
Creators: name: Ye, Fan
name: Lee, Jaesung
name: Feng, Philip X. -L.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Heterostructures play significant roles in modern semiconductor devices and micro/nanosystems in a plethora of applications in electronics, optoelectronics, and transducers. While state-of-the-art heterostructures often involve stacks of crystalline epi-layers each down to a few nanometers thick, the intriguing limit would be heterto-atomic-layer structures. Here we report the first experimental demonstration of freestanding van der Waals heterostructures and their functional nanomechanical devices. By stacking single-layer (1L) MoS2 on top of suspended single-, bi-, tri- and four-layer (1L to 4L) graphene sheets, we realize array of MoS2-graphene heterostructures with varying thickness and size. These heterostructures all exhibit robust nanomechanical resonances in the very high frequency (VHF) band (up to ~100 MHz). We observe that fundamental-mode resonance frequencies of the heterostructure devices fall between the values of graphene and MoS2 devices. Quality (Q) factors of heterostructure resonators are lower than those of graphene but comparable to those of MoS2 devices, suggesting interface damping related to interlayer interactions in the van der Waals heterostructures. This study validates suspended atomic layer heterostructures as an effective device platform and opens opportunities for exploiting mechanically coupled effects and interlayer interactions in such devices.
Financing Agriculture and Rural America: Issues of Policy, Structure and Technical Change: A Comparative Study of the Financial Performance of Grain and Oilseed Farms in Ontario and Illinois
Creators: name: Turvey, Calum
name: Ellinger, Paul
name: Turvey, Calum
name: Ellinger, Paul
Publisher: name: Unknown
Year: 2002
Subjects: Agricultural Finance

description: This paper provides a comparison between grain farms in Ontario and Illinois. The intent is to focus on how the two regions compare, economically, and how government programs in each region differ and affect asset valuations. In general the results indicate that the two economies move in tandem when it comes to revenue, income, and cash flow generation, the use of debt, and with bankruptcies. Significant differences appear in terms of government programs between the two regions. In Illinois the level of direct support per acre appears to be significantly higher than in Ontario. In terms of land values a paradox is found in that Ontario land values appear to be more highly correlated with the economics and level of support in Illinois and the United States. At the cursory level of analyses it appears that the farmland capitalization model is more supported in the U.S. than in Canada.
Nonlinear statistics of quantum transport in chaotic cavities
Creators: name: Savin, D. V.
name: Sommers, H. -J.
name: Wieczorek, W.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: In the framework of the random matrix approach, we apply the theory of Selberg's integral to problems of quantum transport in chaotic cavities. All the moments of transmission eigenvalues are calculated analytically up to the fourth order. As a result, we derive exact explicit expressions for the skewness and kurtosis of the conductance and transmitted charge as well as for the variance of the shot-noise power in chaotic cavities. The obtained results are generally valid at arbitrary numbers of propagating channels in the two attached leads. In the particular limit of large (and equal) channel numbers, the shot-noise variance attends the universal value 1/(64β) that determines a universal Gaussian statistics of shot-noise fluctuations in this case.
description: 4 pages, 1 figure
Space-Efficient, High-Performance Rank & Select Structures on Uncompressed Bit Sequences
Creators: name: Zhou, Dong
name: Andersen, David G.
name: Kaminsky, Michael
Publisher: name: Carnegie Mellon University
Year: 1968
Subjects: subject: 89999 Information and Computing Sciences not elsewhere classified
subject: FOS: Computer and information sciences

description: Rank & select data structures are one of the fundamental building blocks for many modernsuccinct data structures. With the continued growth of massive-scale information services, the space efficiency of succinct data structures is becoming increasingly attractive in practice. In this paper, we re-examine the design of rank & select data structures from the bottom up, applying an architectural perspective to optimize their operation. We present our results in the form of a recipe for constructing space and time efficient rank & select data structures for a given hardware architecture. By adopting a cache-centric design approach, our rank & select structures impose space overhead as low as the most space-efficient, but slower, prior designs—only 3.2% and 0.39% extra space respectively—while offering performance competitive with the highest-performance prior designs.
Variational inference for sparse spectrum Gaussian process regression
Creators: name: Tan, Linda S. L.
name: Ong, Victor M. H.
name: Nott, David J.
name: Jasra, Ajay
Publisher: name: arXiv
Year: 2013
Subjects: subject: Computation (stat.CO)
subject: FOS: Computer and information sciences

description: We develop a fast variational approximation scheme for Gaussian process (GP) regression, where the spectrum of the covariance function is subjected to a sparse approximation. Our approach enables uncertainty in covariance function hyperparameters to be treated without using Monte Carlo methods and is robust to overfitting. Our article makes three contributions. First, we present a variational Bayes algorithm for fitting sparse spectrum GP regression models that uses nonconjugate variational message passing to derive fast and efficient updates. Second, we propose a novel adaptive neighbourhood technique for obtaining predictive inference that is effective in dealing with nonstationarity. Regression is performed locally at each point to be predicted and the neighbourhood is determined using a measure defined based on lengthscales estimated from an initial fit. Weighting dimensions according to lengthscales, this downweights variables of little relevance, leading to automatic variable selection and improved prediction. Third, we introduce a technique for accelerating convergence in nonconjugate variational message passing by adapting step sizes in the direction of the natural gradient of the lower bound. Our adaptive strategy can be easily implemented and empirical results indicate significant speedups.
description: 20 pages, 11 figures, 1 table
Kinematic calibration of orthoglide-type mechanisms
Creators: name: Pashkevich, Anatoly
name: Chablat, Damien
name: Wenger, Philippe
Publisher: name: arXiv
Year: 2007
Subjects: subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: The paper proposes a novel calibration approach for the Orthoglide-type mechanisms based on observations of the manipulator leg parallelism during mo-tions between the prespecified test postures. It employs a low-cost measuring system composed of standard comparator indicators attached to the universal magnetic stands. They are sequentially used for measuring the deviation of the relevant leg location while the manipulator moves the TCP along the Cartesian axes. Using the measured differences, the developed algorithm estimates the joint offsets that are treated as the most essential parameters to be adjusted. The sensitivity of the meas-urement methods and the calibration accuracy are also studied. Experimental re-sults are presented that demonstrate validity of the proposed calibration technique
Space-Efficient Scheduling of Parallelism with Synchronization Variables
Creators: name: Blelloch, Guy E.
name: Gibbons, Phillip P.
name: Matias, Yossi
name: Narlikar, Girija
Publisher: name: Carnegie Mellon University
Year: 1983
Subjects: subject: 89999 Information and Computing Sciences not elsewhere classified
subject: FOS: Computer and information sciences

description: Recent work on scheduling algorithms has resulted in provable bounds on the space taken by parallel computations in relation to the space taken by sequential computations. The results for online versions of these algorithms, however, have been limited to computations in which threads can only synchronize with ancestor or sibling threads. Such computations do not include languages with futures or user-specified synchronization constraints. Here we extend the results to languages with synchronization variables. Such languages include languages with futures, such as Multilisp and Cool, as well as other languages such as ID. The main result is an online scheduling algorithm which, given a computation with w work (total operations), s synchronizations, d depth (critical path) and S1 sequential space, will run in O(w/p + s log (pd)/p + d log (p d)) time and S1 + O(p d log (p d)) space, on a p-processor CRCW PRAM with a fetch-and-add primitive. This includes all time and space costs for both the computation and the scheduler. The scheduler is non-preemptive in the sense that it will only move a thread if the thread suspends on a synchronization, forks a new thread, or exceeds a threshold when allocating space. For the special case where the computation is a planar graph with left-to-right synchronization edges, the scheduling algorithm can be implemented in O(w/p + d log p) time and S1 + O(p d log p) space. These are the first non-trivial space bounds described for such languages.
Pictorial Representation for Antisymmetric Eigenfunctions of PS-3 Integral Equations
Creators: name: Bogatyrev, Andrei
Publisher: name: arXiv
Year: 2007
Subjects: subject: Complex Variables (math.CV)
subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 45C05, 30E25, 30F10

description: Eigenvalue problem for Poincare-Steklov-3 integral equation is reduced to the solution of three transcendential equations for three unknown numbers, moduli of pants. The complete list of antisymmetric eigenfunctions of integral equation in terms of Kleinian membranes is given.
description: 33 pages, 13 figures. This paper is an extended version of CV/0611734
An approach to quantum gas microscopy of polar molecules
Creators: name: Covey, Jacob P.
name: De Marco, Luigi
name: Acevedo, Oscar L.
name: Rey, Ana Maria
name: Ye, Jun
Publisher: name: arXiv
Year: 2017
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Quantum Gases (cond-mat.quant-gas)
subject: Optics (physics.optics)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Ultracold polar molecules are an ideal platform for studying many-body physics with long-range dipolar interactions. Experiments in this field have progressed enormously, and several groups are pursuing advanced apparatus for manipulation of molecules with electric fields as well as single-atom-resolved in situ detection. Such detection has become ubiquitous for atoms in optical lattices and tweezer arrays, but has yet to be demonstrated for ultracold polar molecules. Here we present a proposal for the implementation of quantum gas microscopy for polar molecules, and specifically discuss a technique for spin-resolved molecular detection. We use numerical simulation of spin dynamics of lattice-confined polar molecules to show how such a scheme would be of utility in a spin-diffusion experiment.
description: 23 pages, 4 figures
Space-Efficient Finger Search on Degree-Balanced Search Trees
Creators: name: Blelloch, Guy E.
name: Maggs, Bruce M
name: Woo, Shan Leung Maverick
Publisher: name: Carnegie Mellon University
Year: 1968
Subjects: subject: 89999 Information and Computing Sciences not elsewhere classified
subject: FOS: Computer and information sciences

description: We show how to support the finger search operation on degree-balanced search trees in a space-efficient manner that retains a worst-case time bound of O(log d), where d is the difference in rank between successive search targets. While most existing tree-based designs allocate linear extra storage in the nodes (e.g., for side links and parent pointers), our design maintains a compact auxiliary data structure called the "hand" during the lifetime of the tree and imposes no other storage requirement within the tree.The hand requires O(log n) space for an n-node tree and has a relatively simple structure. It can be updated synchronously during insertions and deletions with time proportional to the number of structural changes in the tree. The auxiliary nature of the hand also makes it possible to introduce finger searches into any existing implementation without modifying the underlying data representation (e.g., any implementation of Red-Black trees can be used). Together these factors make finger searches more appealing in practice.Our design also yields a simple yet optimal in-order walk algorithm with worst-case O(1) work per increment (again without any extra storage requirement in the nodes), and we believe our algorithm can be used in database applications when the overall performance is very sensitive to retrieval latency.