cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Risk Premia and Optimal Liquidation of Defaultable Securities
Creators: name: Leung, Siu Tang
name: Liu, Peng
Publisher: name: Columbia University
Year: 2011
Subjects: Finance
Economics

description: This paper studies the optimal timing to liquidate defaultable securities in a general intensity-based credit risk model under stochastic interest rate. We incorporate the potential price discrepancy between the market and investors, which is characterized by risk-neutral valuation under different default risk premia specifications. To quantify the value of optimally timing to sell, we introduce the delayed liquidation premium which is closely related to the stochastic bracket between the market price and a pricing kernel. We analyze the optimal liquidation policy for various credit derivatives. Our model serves as the building block for the sequential buying and selling problem. We also discuss the extensions to a jump-diffusion default intensity model as well as a defaultable equity model.
Affective social anthropomorphic intelligent system
Creators: name: Mamun, Md. Adyelullahil
name: Abdullah, Hasnat Md.
name: Alam, Md. Golam Rabiul
name: Hassan, Muhammad Mehedi
name: Uddin, Md. Zia
Publisher: name: arXiv
Year: 2023
Subjects: subject: Sound (cs.SD)
subject: Artificial Intelligence (cs.AI)
subject: Computation and Language (cs.CL)
subject: Human-Computer Interaction (cs.HC)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Human conversational styles are measured by the sense of humor, personality, and tone of voice. These characteristics have become essential for conversational intelligent virtual assistants. However, most of the state-of-the-art intelligent virtual assistants (IVAs) are failed to interpret the affective semantics of human voices. This research proposes an anthropomorphic intelligent system that can hold a proper human-like conversation with emotion and personality. A voice style transfer method is also proposed to map the attributes of a specific emotion. Initially, the frequency domain data (Mel-Spectrogram) is created by converting the temporal audio wave data, which comprises discrete patterns for audio features such as notes, pitch, rhythm, and melody. A collateral CNN-Transformer-Encoder is used to predict seven different affective states from voice. The voice is also fed parallelly to the deep-speech, an RNN model that generates the text transcription from the spectrogram. Then the transcripted text is transferred to the multi-domain conversation agent using blended skill talk, transformer-based retrieve-and-generate generation strategy, and beam-search decoding, and an appropriate textual response is generated. The system learns an invertible mapping of data to a latent space that can be manipulated and generates a Mel-spectrogram frame based on previous Mel-spectrogram frames to voice synthesize and style transfer. Finally, the waveform is generated using WaveGlow from the spectrogram. The outcomes of the studies we conducted on individual models were auspicious. Furthermore, users who interacted with the system provided positive feedback, demonstrating the system's effectiveness.
description: Multimedia Tools and Applications (2023)
PSYCHOLINGUISTIC ANALYSIS OF LITERARY TEXTS
Creators: name: Goforov, Iqboljon
name: Muxtorova, Raximaxon
Publisher: name: Zenodo
Year: 2023

description: One of the most relevant topics in the modern era is the psycholinguistic approach to the text. The literary text's psycholinguistic characteristics in the compared languages are examined in this article. Psycholinguistic analysis depends on acceptance, knowledge, and perception of the literary text.
title: Is It the Judge, the Sender, or Just the Individual Message? Disentangling Person and Message Effects on Variation in Lie-Detection Judgments
Creators: name: Volz, Sarah
name: Reinhard, Marc-André
name: Müller, Patrick
Publisher: name: Universität Kassel
Year: 2023
Subjects: subject: deception detection
subject: sources of variation
subject: credibility
subject: lie-detection ability
subject: confidence
subject: 150
subject: Lügendetektor
subject: Glaubwürdigkeit
subject: Vertrauen

description: Gefördert im Rahmen des Projekts DEAL
The Social Tools of Web 2.0: Opportunities for Academic Libraries
Creators: name: Kroski, Elizabeth A.
Publisher: name: Columbia University
Year: 2007
Subjects: Library science

description: The world of the Web has changed as a new breed of software applications makes it easy to accomplish incredibly sophisticated tasks with little technical know-how. The Internet has seen an explosion of social tools that are empowering ordinary people to connect and participate in a global conversation. People who had previously accessed the Web solely for shopping or research purposes now sign on for the experience of creating and sharing information in the public sphere. They are crafting both content and connections with other users in a new Web that links people to people, as well as to information.
Suppression of the virtual Anderson transition in a narrow impurity band of doped quantum well structures
Creators: name: Agrinskaya, N. V.
name: Kozub, V. I.
name: Poloskin, D. S.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: Earlier we reported an observation at low temperatures of activation conductivity with small activation energies in strongly doped uncompensated layers of p-GaAs/AlGaAs quantum wells. We attributed it to Anderson delocalization of electronic states in the vicinity of the maximum of the narrow impurity band. A possibility of such delocalization at relatively small impurity concentration is related to the small width of the impurity band characterized by weak disorder. In this case the carriers were activated from the "bandtail" while its presence was related to weak background compensation. Here we study an effect of the extrinsic compensation and of the impurity concentration on this "virtual" Anderson transition. It was shown that an increase of compensation initially does not affect the Anderson transition, however at strong compensations the transition is suppressed due to increase of disorder. In its turn, an increase of the dopant concentration initially leads to a suppression of the transition due an increase of disorder, the latter resulting from a partial overlap of the Hubbard bands. However at larger concentration the conductivity becomes to be metallic due to Mott transition.
description: 6 pages, 3 figures; ISSN 0021-3640
School Context and the Gender Gap in Educational Achievement
Creators: name: Legewie, Joscha
name: DiPrete, Thomas A.
Publisher: name: Columbia University
Year: 2011
Subjects: Education
Gender identity
Sex role

description: Today, boys generally underperform relative to girls in schools throughout the industrialized world. Building on theories about gender identity and reports from prior ethnographic classroom observations, we argue that school environment channels conceptions of masculinity in peer culture, fostering or inhibiting boys' development of anti-school attitudes and behavior. Girls' peer groups, by contrast, vary less strongly with the social environment in the extent to which school engagement is stigmatized as un-feminine. As a consequence, boys are more sensitive than girls to school resources that create a learning-oriented environment. To evaluate this argument, we use a quasi-experimental research design and estimate the gender difference in the causal effect of peer socioeconomic status (SES) as an important school resource on test scores. Our design is based on the assumption that assignment to 5th-grade classrooms within Berlin's schools is as good as random, and we evaluate this selection process with an examination of Berlin's school regulations, a simulation analysis, and qualitative interviews with school principals. Estimates of the effect of SES composition on male and female performance strongly support our central hypothesis, and other analyses support our proposed mechanism as the likely explanation for gender differences in the causal effect.
A Fish Called Georgia
Creators: name: Mitchell, Lincoln A.
Publisher: name: Columbia University
Year: 2009
Subjects: International relations
East Europeans

description: An attempt by Imedi Television, a network very close to the Georgian government, to remind the Georgian people, as if they needed reminding, of the threat posed by Russia, by showing a fake newscast of a Russian invasion, backfired causing panic and anger at the government for perpetrating the hoax.
title: Elbow dislocations and accompanying fractures of the forearm bones in children.
Creators: name: Prokina, Anya
Publisher: name: European Congress of Radiology
Year: 2019
Subjects: subject: Musculoskeletal
subject: Bones
subject: Musculoskeletal joint
subject: Paediatric
subject: Conventional radiography
subject: CT
subject: Diagnostic procedure
subject: Trauma
subject: Not applicable
subject: Performed at one institution

description: Learning objectives Background Findings and procedure details Conclusion Personal information and conflict of interest References
description: Learning objectives: - to describe features of children's elbow anatomy. - to show patterns of elbow dislocations and associated fractures. - to demonstrate significant clinical...
On the Categoricity of Quantum Mechanics
Creators: name: Toader, Iulian D.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Quantum Physics (quant-ph)
subject: History and Philosophy of Physics (physics.hist-ph)
subject: FOS: Physical sciences

description: The paper offers an argument against an intuitive reading of the Stone-von Neumann theorem as a categoricity result, thereby pointing out that, against what is usually taken to be the case, this theorem does not entail any model-theoretical difference between the theories that validate it and those that don't.
description: 20 pages
Organiser l'information : du dictionnaire imprimé au(x) référentiel(s), de la donnée à l'autorité
Creators: name: ALLAIN, Anne-Laure
name: PORTE, Guillaume
name: BREUIL, Sandrine
name: MÜLLER, Victoire
Publisher: name: Zenodo
Year: 2023

description: Communication à la journée d'étude « Éditer les compilations de la Renaissance. La référence explicite : de l'index au référentiel ». 17 novembre 2023, Lab (Bnu), Strasbourg. Org. Romane Marlhoux (ILLE, UHA) et Madeleine Hubert (Lab, Bnu) dans le cadre du projet PROC.
 
description: Le projet des « Bibliotheques Françoises », porté aux BVH (CESR) depuis 2015, entends indexer les informations bio-bibliographiques contenues dans deux dictionnaires d'auteurs d'œuvres en français élaborés à la fin du XVIe siècle pour en permettre une interrogation fine. Malgré une granularité et une précision de l'information qui peine parfois à entrer dans les cases de la bibliographie et de la prosopographie modernes, les éléments indexés ont vocation à intégrer et alimenter l'infrastructure de données du programme de recherche BVH, dont l'objectif est double : construire un workflow stable et vertueux pour fluidifier la production et le dialogue des multiples bases et jeux de données en interne (sources patrimoniales numérisées ou éditées, descriptions bibliographiques associées, enrichissements issues des bases de données iconographiques et bio-bibliographiques…), tout en en permettant à terme l'ouverture, l'exploration et l'exploitation par les usagers. Si la volonté de s'inscrire dans la démarche plus vaste de la transition bibliographique et des principes FAIR donne le cadre normalisé et idéalisé du traitement de ces informations, leur compilation et leur désambiguisation au sein d'un même référentiel pose de multiples questions. S'appuyant sur le modèle ontologique RDA-FR, qui permet une forte expressivité des données sans complexifier l'implémentation technique du référentiel, il n'en reste pas moins que l'agrégation des données de différents projets de recherche et l'alignement avec des référentiels externes impliquent également de penser des moyens d'attribuer l'autorité en sourçant et discriminant les données.
description: Biblissima+ bénéficie d'une aide de l'Etat gérée par l'ANR au titre du Programme d'investissements d'avenir intégré à France 2030, portant la référence ANR-21-ESRE-0005. https://projet.biblissima.fr/
description: Le projet PROC (resp. Anne Réach-Ngô – ILLE, UR 4363, UHA) vise à étudier la place des Pratiques de Référencement dans les Œuvres Composites des XVIe-XVIIe siècles (PROC) : Lauréat de l'appel à projet recherche de la MISHA 2023-2024. Voir : https://bvh.hypotheses.org/9104
Steroids Aren't the Only Problem Facing the Hall of Fame
Creators: name: Mitchell, Lincoln A.
Publisher: name: Columbia University
Year: 2013
Subjects: Recreation

description: In 1962, a left-handed hitting 22-year-old Pittsburgh Pirate named Willie Stargell, made his big league debut. That year, in only 34 plate appearances he hit a very respectable .290/.353./452. Stargell would go on to play 21 seasons for the Pirates becoming one of the best and most beloved players in that franchise's history before being elected to the Hall of Fame in his first year of eligibility.
A study of wave propagation in the FitzHugh Nagumo system
Creators: name: Paton, Kelly Marie
Publisher: name: University of British Columbia
Year: 2012

description: An excitable medium has two key properties: a sufficiently large stimulus provokes an even bigger response (excitability), and immediately following a stimulus the medium cannot be excited (refractoriness). A large class of biological systems from cardiac tissue to slime mold are examples of excitable media. FitzHugh Nagumo (FHN) is the canonical model of excitable media. Its two variables are the state of excitation and refractoriness of the one- or two-dimensional medium. Although one of the simplest models, FHN exhibits complex dynamics that have not been fully explored. For example, it supports a stable traveling pulse solution. However, this pulse can be destabilized by large perturbations. In Chapter 2 I explore a one-dimensional example where the perturbation is an increasing refractory profile. This perturbation can lead to collapse of the pulse depending on the steepness of the profile, as conjectured by Keener [Keener, J. (2004) J Theo. Bio. 230(4):459-73]. In Chapter 3 I consider a perturbation in two dimensions which can cause the stable traveling pulse to wrap around the perturbation and generate self-sustaining spiral activity. The one-dimensional example for exponential refractory profiles is explored numerically for a piecewise linear FHN system. Steep profiles lead to collapse while milder profiles allow propagation. The exponential profiles are used as bounds for more general profiles to predict where collapse and propagation will occur. I also make use of a singular FHN system in the limit ε→ 0 to provide insight into the behaviours of the full FHN system for small ε and small diffusion. I conclude this chapter by showing analytically that, in contrast to the full system, a wave in the singular system will propagate for any exponential refractory profile. The two-dimensional case is explored numerically in a FHN system. The use of a temporarily refractory region as a perturbation is a novel mechanism for generating spiral activity. Moreover, it is shown to be robust for refractory regions of a large area. This situation models the appearance of abnormal electrical activity in the heart. In particular, it models the appearance of abnormal electricity activity in undamaged cardiac tissue.
A Comparison of Semi-Supervised Learning Techniques for Streaming ASR at Scale
Creators: name: Peyser, Cal
name: Picheny, Michael
name: Cho, Kyunghyun
name: Prabhavalkar, Rohit
name: Huang, Ronny
name: Sainath, Tara
Publisher: name: arXiv
Year: 2023
Subjects: subject: Computation and Language (cs.CL)
subject: Sound (cs.SD)
subject: Audio and Speech Processing (eess.AS)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Unpaired text and audio injection have emerged as dominant methods for improving ASR performance in the absence of a large labeled corpus. However, little guidance exists on deploying these methods to improve production ASR systems that are trained on very large supervised corpora and with realistic requirements like a constrained model size and CPU budget, streaming capability, and a rich lattice for rescoring and for downstream NLU tasks. In this work, we compare three state-of-the-art semi-supervised methods encompassing both unpaired text and audio as well as several of their combinations in a controlled setting using joint training. We find that in our setting these methods offer many improvements beyond raw WER, including substantial gains in tail-word WER, decoder computation during inference, and lattice density.
Prospects for Discovery of Supersymmetric No-Scale F-SU(5) at The Once and Future LHC
Creators: name: Li, Tianjun
name: Maxin, James A.
name: Nanopoulos, Dimitri V.
name: Walker, Joel W.
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We present the reach of the Large Hadron Collider (LHC) into the parameter space of No-Scale F-SU(5), starting our analysis with the current operating energy of \sqrt{s} = 7 TeV, and extending it on through the bright future of a 14 TeV beam. No-Scale F-SU(5) is a model defined by the confluence of the F-lipped SU(5) Grand Unified Theory, two pairs of hypothetical TeV scale vector-like supersymmetric multiplets with origins in F-theory, and the dynamically established boundary conditions of No-Scale Supergravity. When searching for a five standard deviation signal, we find that the CMS experiment at the \sqrt{s} = 7 TeV LHC began to penetrate the phenomenologically viable parameter space of this model at just under 1/fb of integrated luminosity, and that the majority of this space remains intact, subsequent to analyses of the first 1.1/fb of CMS data. On the contrary, the ATLAS experiment had not reached the F-SU(5) parameter space in its first 1.34/fb of luminosity. Since the CMS and ATLAS detectors have now each amassed a milestone of 5/fb of collected luminosity, the current LHC is presently effectively probing No-Scale F-SU(5). Upon the crossing of the 5/fb threshold, the 7 TeV LHC will have achieved five standard deviation discoverability for a unified gaugino mass of up to about 532 GeV, a light stop of 577 GeV, a gluino of 728 GeV, and heavy squarks of just over 1 TeV. Extending the analysis to include a future LHC center-of-mass beam energy of \sqrt{s} = 14 TeV, the full model space of No-Scale F-SU(5) should be visible to CMS at about 30/fb of integrated luminosity. We stress that the F-SU(5) discoverability thresholds discussed here are contingent upon retaining only those events with nine jets or more for the CMS experiment and seven jets or more for the ATLAS experiment.
description: Nuclear Physics B version: Updated to include CMS 1.1/fb and ATLAS 1.34/fb, 8 Pages, 4 Figures, 4 Tables
Mapping Research Topics on Operational Risk in The Sharia and Conventional Financial Industry: VOSviewer Bibliometric Study and Literature Review
Creators: name: Budianto, Eka Wahyu Hestya
name: Tetria, Nindi Dwi Tetria
Publisher: name: Zenodo
Year: 2023

description: The primary aim of this study is to examine the advancement and growth of research on operational hazards in the Islamic and Conventional Financial Industry from 2002 to 2022. The investigators conducted a comprehensive search for pertinent articles in domestic and international journals listed by Google Scholar, Sinta, and Scopus using the Perish/Harzing application with the term "Operational Risk". This procedure resulted in a total of 348 research articles, which were then analyzed descriptively through a review of literature using the VOSviewer application. The findings indicated a significant rise in the number of publications on operational hazard each year. The VOSviewer analysis recognized 9 distinct clusters of research linked to operational hazards. Furthermore, the literature review revealed 11 primary themes that are closely associated with operational hazard in both Islamic and Conventional Financial Institutions.
Baseball's Dumbest Cliche
Creators: name: Mitchell, Lincoln A.
Publisher: name: Columbia University
Year: 2013
Subjects: Recreation

description: Baseball is a game of, among other things, cliches. It is impossible to watch a ballgame on television, listen to one on the radio or even talk baseball with most fans for long before a player is described as "running pretty well for a catcher," or reporting to spring training in "the best shape of his career." Every championship team is described as having "good chemistry," and middle infielders who stick around for a long time for no apparent reason are still occasionally described as "scrappy."
title: Cardiac Fibroma: is T1 mapping “the new tool” for a correct diagnosis?
Creators: name: Letteriello, Mayla
Publisher: name: European Congress of Radiology
Year: 2020
Subjects: subject: Cardiac
subject: Cardiac
subject: Contrast agents
subject: MR
subject: Education
subject: Tissue characterisation
subject: Retrospective
subject: Observational
subject: Performed at one institution

description: Learning objectives Background Findings and procedure details Conclusion Personal information and conflict of interest References
description: Learning objectives: Cardiac fibroma (CF) is a benign tumor and the correct diagnosis targets treatments. CFs have typical but not unique cardiac magnetic resonance (CMR) characteristics. The main aim is to evaluate the CMR characteristics and to hypothesize that T1...
Hybridization of wave functions in one-dimensional localization
Creators: name: Ivanov, D. A.
name: Skvortsov, M. A.
name: Ostrovsky, P. M.
name: Fominov, Ya. V.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: A quantum particle can be localized in a disordered potential, the effect known as Anderson localization. In such a system, correlations of wave functions at very close energies may be described, due to Mott, in terms of a hybridization of localized states. We revisit this hybridization description and show that it may be used to obtain quantitatively exact expressions for some asymptotic features of correlation functions, if the tails of the wave functions and the hybridization matrix elements are assumed to have log-normal distributions typical for localization effects. Specifically, we consider three types of one-dimensional systems: a strictly one-dimensional wire and two quasi-one-dimensional wires with unitary and orthogonal symmetries. In each of these models, we consider two types of correlation functions: the correlations of the density of states at close energies and the dynamic response function at low frequencies. For each of those correlation functions, within our method, we calculate three asymptotic features: the behavior at the logarithmically large "Mott length scale", the low-frequency limit at length scale between the localization length and the Mott length scale, and the leading correction in frequency to this limit. In the several cases, where exact results are available, our method reproduces them within the precision of the orders in frequency considered.
description: 10 pages, 5 figures. Several references added, minor corrections corresponding to the journal version
title: Effect of class size on students’ ultrasound skills performance at Ernest cook Ultrasound Research and Education Institute (ECUREI)
Creators: name: Kabahinza, Chantel
Publisher: name: European Congress of Radiology
Year: 2020
Subjects: subject: Education and Training
subject: Genital / Reproductive system female
subject: Obstetrics (Pregnancy / birth / postnatal period)
subject: Ultrasound physics
subject: Ultrasound
subject: Ultrasound-Colour Doppler
subject: Ultrasound-Power Doppler
subject: Diagnostic procedure
subject: Education
subject: Intrauterine diagnosis
subject: Artifacts
subject: Cirrhosis
subject: Tropical diseases
subject: Retrospective
subject: Cross-sectional study
subject: Performed at one institution

description: Learning objectives Background Findings and procedure details Conclusion Personal information and conflict of interest References
description: Learning objectives: The learning objectives of this study included; To assess if the Ordinary Diploma in Ultrasound class-size increment affects the students’ ultrasound-skills performance. To describe the methods for teaching ultrasound skills to medium and large...
CEIL: A General Classification-Enhanced Iterative Learning Framework for Text Clustering
Creators: name: Zhao, Mingjun
name: Wang, Mengzhen
name: Ma, Yinglong
name: Niu, Di
name: Wu, Haijiang
Publisher: name: arXiv
Year: 2023
Subjects: subject: Computation and Language (cs.CL)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: Text clustering, as one of the most fundamental challenges in unsupervised learning, aims at grouping semantically similar text segments without relying on human annotations. With the rapid development of deep learning, deep clustering has achieved significant advantages over traditional clustering methods. Despite the effectiveness, most existing deep text clustering methods rely heavily on representations pre-trained in general domains, which may not be the most suitable solution for clustering in specific target domains. To address this issue, we propose CEIL, a novel Classification-Enhanced Iterative Learning framework for short text clustering, which aims at generally promoting the clustering performance by introducing a classification objective to iteratively improve feature representations. In each iteration, we first adopt a language model to retrieve the initial text representations, from which the clustering results are collected using our proposed Category Disentangled Contrastive Clustering (CDCC) algorithm. After strict data filtering and aggregation processes, samples with clean category labels are retrieved, which serve as supervision information to update the language model with the classification objective via a prompt learning approach. Finally, the updated language model with improved representation ability is used to enhance clustering in the next iteration. Extensive experiments demonstrate that the CEIL framework significantly improves the clustering performance over iterations, and is generally effective on various clustering algorithms. Moreover, by incorporating CEIL on CDCC, we achieve the state-of-the-art clustering performance on a wide range of short text clustering benchmarks outperforming other strong baseline methods.
description: The Web Conference 2023
Ukraine's Election and the Value of a Divided Electorate
Creators: name: Mitchell, Lincoln A.
Publisher: name: Columbia University
Year: 2010
Subjects: International relations
East Europeans

description: The first round of the Ukrainian election, which was held on the 17th of January, was inconclusive making a runoff, scheduled for February 7th , necessary. At first glance, the contrast between the two candidates in the runoff, Prime Minister Yulia Timoschenko the heroine of the 2004 Orange Revolution, and Viktor Yanukovich, the man whose fraudulent attempt to claim victory led directly to the Orange Revolution, is stark. According to the most common narrative, Timoschenko is viewed as pro-west and likely to bring Ukraine closer into the European orbit while Yanukovich is closer to Russia and likely to strengthen ties with Russia while weakening relations with Europe and the U.S. The reality is that both candidates will have to continue the extremely difficult task of balancing a divided country between Russia and the west while trying to reenergize an economy which has been badly hurt by the global economic downturn. It is very likely that the winning candidate will not have a sufficient mandate, or enough votes in parliament, to quickly change the course of Ukraine. Moreover, the electorate is sufficiently polarized, hence the need for the runoff between these two candidates, that no president will be able to abandon the west in favor of Russia, or do the reverse. Additionally, in recent years, Timoschenko's western orientation has become more equivocal as she too has sought to improve Ukraine's relations with Russia.
Static Patch Solipsism: Conformal Symmetry of the de Sitter Worldline
Creators: name: Anninos, Dionysios
name: Hartnoll, Sean A.
name: Hofman, Diego M.
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We show that the propagators of gravitons and scalar fields seen by a static patch observer in de Sitter spacetime are controlled by hidden SL(2,R) symmetries, at all frequencies. The retarded Green's function is determined by an SL(2,R) x SL(2,R) action generated by conformal Killing vectors of de Sitter spacetime times a line. This observation uses the fact that the static patch of dS_{d+1} x R is conformal to the hyperbolic patch of AdS_3 x S^{d-1}. The poles of the propagators, the quasinormal frequencies, are generated by associated SL(2,R) actions. The quasinormal mode generating algebras capture the conformal weights more usually read off from the fields at future and past infinity. For conformally coupled scalar fields, and for gravitons in four dimensions, this SL(2,R) algebra has an enhanced supersymmetric structure and is generated by particular conformal Killing vectors of de Sitter spacetime. We show how the worldline de Sitter propagators can be reproduced from a `level matched' left and right moving conformal quantum mechanics with an appropriate spectrum of primary operators. Our observations are consistent with the notion that the static patch of de Sitter spacetime is dually described by a (level matched) large N worldline conformal quantum mechanics.
description: 1+26 pages, 1 figure. v2: citations added, minor clarifications and typos fixed
Original approach for the drilling process op-timization in open cast mines; case study of Kef Essenoun open pit mine northeast of Algeria
Creators: name: Rais, Khaled
name: Kara, Mohamed
name:      Hr Hadji, Riheb
name: Gadri, Larbi
name: Khochmen, Lakhder
Publisher: name: Wroclaw University of Science and Technology, Faculty of Geoengineering, Mining and Geology
Year: 2017
Subjects: Taguchi method, statistical analysis, Design of experimental, variance, Phosphate mine

description: Mining Science
Think Before You Act: Unified Policy for Interleaving Language Reasoning with Actions
Creators: name: Mezghani, Lina
name: Bojanowski, Piotr
name: Alahari, Karteek
name: Sukhbaatar, Sainbayar
Publisher: name: arXiv
Year: 2023
Subjects: subject: Computation and Language (cs.CL)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: The success of transformer models trained with a language modeling objective brings a promising opportunity to the reinforcement learning framework. Decision Transformer is a step towards this direction, showing how to train transformers with a similar next-step prediction objective on offline data. Another important development in this area is the recent emergence of large-scale datasets collected from the internet, such as the ones composed of tutorial videos with captions where people talk about what they are doing. To take advantage of this language component, we propose a novel method for unifying language reasoning with actions in a single policy. Specifically, we augment a transformer policy with word outputs, so it can generate textual captions interleaved with actions. When tested on the most challenging task in BabyAI, with captions describing next subgoals, our reasoning policy consistently outperforms the caption-free baseline.
title: Contrast material–enhanced breast MR imaging: Survival kit for every resident
Creators: name: Jendoubi, Salma
Publisher: name: European Congress of Radiology
Year: 2020
Subjects: subject: Not applicable
subject: Cancer
subject: Technical aspects
subject: MR
subject: CAD
subject: Genital / Reproductive system female
subject: Breast
subject: Not applicable

description: Learning objectives Background Findings and procedure details Conclusion Personal information and conflict of interest References
description: Learning objectives: After a reminder of the current indications for contrast material–enhanced breast MR imaging, we will enumerate artifacts that may confound interpretation so they could be recognized and corrected. MRI technique and protocol will be detailed....
Obama's Unconvincing Argument That Afghanistan Is Not Vietnam
Creators: name: Mitchell, Lincoln A.
Publisher: name: Columbia University
Year: 2009
Subjects: International relations

description: Comparisons between the wars in Afghanistan and Vietnam have grown stronger in recent weeks. While this concern has been raised, often with the buzzword quagmire, about every conflict since the end of the U.S. effort in Vietnam, it is not without reason that this is mentioned with regards to Afghanistan. It is hard to ignore the similarities between the two conflicts. In both cases, the U.S. got involved in a war far away for which there was no easily foreseeable resolution. Obama, like another Democratic president more than four decades ago, was convinced, to some extent by his own generals, that more troops would make the difference and drew the U.S. further into the conflict. The Vietnam War destroyed Johnson’s presidency and overshadowed some of his impressive accomplishments on domestic issues. Critics of the war in Afghanistan, many of whom are supporters of the current president, do not want to see the same thing happen to Obama.
Agauopsis brevipalpus
Creators: name: Durucan, Furkan
name: Paz, Juan Carlos De La
name: Hernández-Teixidor, David
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Trombidiformes
Halacaridae
Agauopsis
Agauopsis brevipalpus

description: Agauopsis brevipalpus (Trouessart, 1889)
 Material examined
 One female (FDHAL-21/2) and three males, El Pris (Gelidium sp., upper mid-littoral zone); one female and one male, La Barranquera (Gelidium pusillum, upper mid-littoral zone).
 Diagnosis
The length of females was between 400 and 460 µm, and for males, 450 µm. Idiosoma wide and heavily armed. Integument of plates brownish. Raised porose areolae of dorsal plates with canaliculi. Ostia lacking. AD with small frontal process and the plate clearly raised H-like costa. OC with two corneae, porose areola triangular in outline and rounded angles. Eye spots present beneath AD and OC. PD with pair of medial and lateral costae and the plate anteriorly rounded. Ventral plates porose and faintly reticulate. AE wide, posterior margin of AE and anterior margin of GA truncate. Gnathosoma and palps are slender. Rostrum about as long as gnathosomal base (Bartsch 1996) (Fig. 3B).
 Remarks
 This is one of the species most encountered within a genus widely distributed and reported in the Black Sea, Mediterranean Sea and eastern Atlantic (Bartsch 2004; Durucan and Boyaci 2018; Durucan 2020, 2021). In the Atlantic Ocean, A. brevipalpus has been reported from the Azores, Canary Islands, British Isles and continental Spain (Bartsch 2015).
description: Published as part of Durucan, Furkan, Paz, Juan Carlos De La & Hernández-Teixidor, David, 2023, Halacaridae (Acari) from Tenerife (Canary Islands), pp. 1-19 in Persian Journal of Acarology 12 (1) on page 4, DOI: 10.22073/pja.v12i1.76823, http://zenodo.org/record/10267938
title: Terson's syndrome: pathophysiology and imaging findings
Creators: name: Castorani, Giulia
Publisher: name: European Congress of Radiology
Year: 2020
Subjects: subject: Not applicable
subject: Not applicable
subject: Education and training
subject: Aneurysms
subject: Complications
subject: CT
subject: Neuroradiology brain
subject: Eyes
subject: Emergency
subject: Neuro

description: Learning objectives Background Findings and procedure details Conclusion Personal information and conflict of interest References
description: Learning objectives: - Describe Terson's Syndrome - Evaluate the radiological aspects leading to Terson’s syndrome - Underline the importance of an early...
title: Die Weichen sind gestellt – doch der Streckenausbau ist noch nicht abgeschlossen
title: Soziale Differenzierung im Altersübergang als Ergebnis bisheriger arbeitsmarkt- und rentenpolitischer Reformen
titleType: AlternativeTitle
Creators: name: Brussig, Martin
name: Knuth, Matthias
name: Wojtkowski, Sascha
Publisher: name: DuEPublico: Duisburg-Essen Publications Online, University of Duisburg-Essen, Germany
Year: 2018

description: Auf einen Blick …
•
Zwischen 2001 und 2006 verzeichnete Deutschland innerhalb der Europäischen Union den höchsten Zuwachs der Erwerbstätigenquote der 55- bis 64-Jährigen und hat gute Chancen, bis zum Jahr 2010 das Ziel einer Alterserwerbsbeteiligung von 50 Prozent zu erreichen. Einen erheblichen Beitrag zum Anstieg der Alterserwerbsbeteiligung leistet eine günstige demographische Konstellation. Hauptursache ist jedoch, dass Männer länger und Frauen zu höheren Anteilen als früher erwerbstätig sind.
•
Seit 1997 steigen die Altersgrenzen für den abschlagsfreien Rentenbeginn. Auch in Reaktion auf die Abschläge, die bei vorzeitigem Rentenbeginn fällig werden, ist das durchschnittliche Rentenzugangsalter in sechs Jahren um ein Jahr auf 63,2 Jahre gestiegen (2006).
•
Da die Frühverrentung bei Arbeitslosigkeit mit Abschlägen belegt wurde, hat sich in den letzten ca. fünf Jahren Arbeitslosigkeit im Alter ab 60 Jahren überhaupt erst he-rausgebildet. Sie wird durch die Statistiken der Bundesagentur für Arbeit nicht vollständig dargestellt. Bezogen beispielsweise 2001 weniger als 2 Prozent der 62-Jährigen Leistungen wegen Arbeitslosigkeit, so waren es 2006 mehr als dreimal so viel (knapp 7 Prozent).
•
Arbeitslosigkeit im Alter bleibt ein starker Treiber in die Frühverrentung. Mehr als jede/r Fünfte, der oder die in den drei Jahren vor Rentenbeginn arbeitslos, nur geringfügig beschäftigt oder dauerhaft krank war, ging 2005 mit 60 Jahren und maximalen Abschlägen in Rente.
•
Wenn es nicht gelingt, Erwerbschancen auch jenseits des 60. Lebensjahres für alle zu gewährleisten, ist eine weiter wachsende Differenzierung in den Chancen auf einen di-rekten und selbst bestimmten Übergang in eine auskömmliche Rente zu erwarten.
Effect of Boron substitution on the superconductivity of non-oxide perovskite MgCNi3
Creators: name: Kumar, Anuj
name: Jha, Rajveer
name: Tandon, R. P.
name: Awana, V. P. S.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We report synthesis, structural and magnetic (DC and AC) properties of Boron substituted MgCNi3 superconductor. A series of polycrystalline bulk samples Mg1.2C1.6-xBxNi3 (x = 0.0, 0.08 and 0.16) is synthesized through standard solid-state reaction route, which are found to crystallize in cubic perovskite structure with space group Pm3m. Rietveld analysis of observed XRD data show that lattice parameters expand from a = 3.8106 (4) Å for pure, to 3.8164 (2) Å and 3.8173 (5) Å for 5% and 10% Boron substituted samples respectively. DC magnetization exhibited superconducting transition (Tc) at around 7.3 K for pure sample, and the same decreases slightly with Boron substitution. The lower critical field (Hc1) at 2 K is around 150 Oe for pure sample, which increases slightly with Boron substitution. For pure sample the upper critical field (Hc2) being determined from AC susceptibility measurements is 11.6 kOe and 91.70 kOe with 50% and 90% diamagnetism criteria respectively, which decreases to 5.57 kOe and 42.5 kOe respectively for 10% Boron substituted sample. 10% Boron substitution at Carbon site has decreased both the Hc2 and Tc. On the other hand lower critical field (Hc1) at 2 K is slightly increased from around 150 Oe for pure sample, to 200 Oe for 10% Boron substituted sample. Seemingly, the Carbon site Boron substitution induced disorder though has increased slightly the Hc1 but with simultaneous decrease in superconducting transition temperature (Tc) and upper critical field (Hc2). The high relative proportion of Ni in studied MgCNi3 suggests that magnetic interactions are important and non-oxide perovskite structure make it interesting.
description: 13 Pages Text + Figures: comments/suggestions (awana@mail.nplindia.ernet.in)
Conceptualizing Approaches to Critical Computing Education: Inquiry, Design and Reimagination
Creators: name: Morales-Navarro, Luis
name: Kafai, Yasmin B.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Computers and Society (cs.CY)
subject: FOS: Computer and information sciences
subject: K.3.2; K.4.0

description: As several critical issues in computing such as algorithmic bias, discriminatory practices, and techno-solutionism have become more visible, numerous efforts are being proposed to integrate criticality in K-16 computing education. Yet, how exactly these efforts address criticality and translate it into classroom practice is not clear. In this conceptual paper, we first historicize how current efforts in critical computing education draw on previous work which has promoted learner empowerment through critical analysis and production. We then identify three emergent approaches: (1) inquiry, (2) design and (3) reimagination that build on and expand these critical traditions in computing education. Finally, we discuss how these approaches highlight issues to be addressed and provide directions for further computing education research.
Is Obama About to Make a Disastrous Mistake?
Creators: name: Mitchell, Lincoln A.
Publisher: name: Columbia University
Year: 2009
Subjects: International relations

description: President Obama’s decision about Afghanistan will likely be one of the most important ones he makes during his presidency and will almost certainly set the tone and the agenda for the rest of his time in office. The President has taken a long time on this decision. While it is possible that he simply cannot make up his mind, it is also possible that he is using this time to put all the pieces in place to support his decision. Whatever the president decides, whether it is withdrawal, adding 30,000-40,000 more troops or something in between, there will be a lot of political and logistical work that needs to be done. Doing this work, which, if Obama decides to send more troops, includes issues of moving soldiers and material to Afghanistan, determining what countries can be flown over and what cannot and what commitments can be expected by allies and other countries in the region, takes time and is better done in advance rather than once the decision is made and the policy is moving forward.
Wilson loops in noncommutative Yang-Mills theory using gauge/gravity duality
Creators: name: Chakraborty, Somdeb
name: Haque, Najmul
name: Roy, Shibaji
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: By using the gauge/gravity duality and the Maldacena prescription we compute the expectation values of the Wilson loops in noncommutative Yang-Mills (NCYM) theory in (3+1) dimensions. We consider both the time-like and the light-like Wilson loops. The gravity dual background is given by a particular decoupling limit of (D1,D3) bound state of type IIB string theory. We obtain the velocity dependent quark-antiquark potential and numerically study how the dipole length and the potential change with velocity (for 0 < v < 1, i.e., the Wilson loop is time-like) of the dipole as well as noncommutativity. We discuss and compare the results with the known commutative results. We also obtain an analytic expression for the screening length when the rapidity is large and the noncommutativity parameter is small with the product remaining small. When v \rightarrow 1, the time-like Wilson loop becomes light-like and in that case we obtain the form of the jet quenching parameter for the strongly coupled noncommutative Yang-Mills plasma which matches with our earlier results obtained using different method.
description: Latex file, 24 pages, 12 figures, v2, 28 pages, more clarifications and references added, to appear in Nuclear Physics B
A Case Study in Information Flow Refinement for Low Level Systems
Creators: name: Roberto Guanciale
name: Christoph Baumann
name: Pablo Buiras
name: Mads Dam
name: Hamed Nemati
Publisher: name: CISPA
Year: 2023

description: In this work we employ information-flow-aware refinement to study security properties of a separation kernel. We focus on refinements that support changes in data representation and semantics, including the addition of state variables that may induce new observational power or side channels. We leverage an epistemic approach to ignorance-preserving refinement where an abstract model is used as a specification of a system's permitted information flows that may include the declassification of secret information. The core idea is to require that refinement steps must not induce observer knowledge that is not already available in the abstract model. In particular, we show that a simple key manager may cause information leakage via a refinement that includes cache and timing information. Finally, we show that deploying standard countermeasures against cache-based timing channels regains ignorance preservation.
title: Spectrum of MR imaging findings in paediatric neurometabolic disorders!
Creators: name: Waheed, Khawaja Bilal
Publisher: name: European Congress of Radiology
Year: 2020
Subjects: subject: Neuro
subject: CNS
subject: MR
subject: Diagnostic procedure
subject: Metabolic disorders
subject: Retrospective
subject: Observational
subject: Not applicable

description: Learning objectives Background Findings and procedure details Conclusion Personal information and conflict of interest References
description: Learning objectives: To highlight MR imaging findings in diagnosed cases of paediatric neurometabolic...
A Study of Unemployment and Underemployment in Clinical Music Therapy
Creators: name: Kelley, Christopher A.
Publisher: name: University of Kentucky Libraries
Year: 2019

description: Abstract:
Music therapy has been an established health profession for over 60 years serving a diverse population in different settings. Researchers studied the effects of burnout, career longevity, job satisfaction, and workforce analysis of clinical music therapy; however, no studies exist on the prevalence of unemployment and underemployment in clinical music therapy. The purpose of this study was to determine the prevalence of unemployment and underemployment in clinical music therapy.
Participants who completed an anonymous online survey (n = 1,240) were board-certified music therapists who provided information on their current employment status. Results showed that the prevalence of unemployment among the participants was 5.78%, and prevalence of underemployment was 15.6%. Music therapists with more than 15 years of experience were more likely to work full-time than music therapists with 15 or fewer years of experience. Music therapists over 40 were no more likely to work full-time than music therapists who were 39 or younger. Implications for music therapy practice are discussed.
Copyright: © Christopher Allen Kelley 2019
title: Tumors and tumor-like lesions associated with endometriosis
Creators: name: Kitai, Satomi
Publisher: name: European Congress of Radiology
Year: 2020
Subjects: subject: Not applicable
subject: Not applicable
subject: Inflammation
subject: Cancer
subject: Diagnostic procedure
subject: MR
subject: Genital / Reproductive system female
subject: Genitourinary

description: Learning objectives Background Findings and procedure details Conclusion Personal information and conflict of interest References
description: Learning objectives: To be familiar with the imaging findings of ovarian cancer and ovarian borderline tumors, which may arise in endometriotic cysts. To be aware of benign tumor-like lesions, which might appear in endometriosis, mimicking malignancy. To present rare...