cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Interplay between RIS and AI in Wireless Communications: Fundamentals, Architectures, Applications, and Open Research Problems
Creators: name: Wang, Jinghe
name: Tang, Wankai
name: Han, Yu
name: Jin, Shi
name: Li, Xiao
name: Wen, Chao-Kai
name: Cheng, Qiang
name: Cui, Tie Jun
Publisher: name: arXiv
Year: 2021
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: Future wireless communication networks are expected to fulfill the unprecedented performance requirements to support our highly digitized and globally data-driven society. Various technological challenges must be overcome to achieve our goal. Among many potential technologies, reconfigurable intelligent surface (RIS) and artificial intelligence (AI) have attracted extensive attention, thereby leading to a proliferation of studies for utilizing them in wireless communication systems. The RIS-based wireless communication frameworks and AI-enabled technologies, two of the promising technologies for the sixth-generation networks, interact and promote with each other, striving to collaboratively create a controllable, intelligent, reconfigurable, and programmable wireless propagation environment. This paper explores the road to implementing the combination of RIS and AI; specifically, integrating AI-enabled technologies into RIS-based frameworks for maximizing the practicality of RIS to facilitate the realization of smart radio propagation environments, elaborated from shallow to deep insights. We begin with the basic concept and fundamental characteristics of RIS, followed by the overview of the research status of RIS. Then, we analyze the inevitable trend of RIS to be combined with AI. In particular, we focus on recent research about RIS-based architectures embedded with AI, elucidating from the intelligent structures and systems of metamaterials to the AI-embedded RIS-assisted wireless communication systems. Finally, the challenges and potential of the topic are discussed.
The CARMA-NRO Orion Survey: Filament Formation via Collision-Induced Magnetic Reconnection -- The Stick in Orion A
Creators: name: Kong, Shuo
name: Ossenkopf-Okada, Volker
name: Arce, Héctor G.
name: Bally, John
name: Sánchez-Monge, Álvaro
name: McGehee, Peregrine
name: Suri, Sümeyye
name: Klessen, Ralf S.
name: Carpenter, John M.
name: Lis, Dariusz C.
name: Nakamura, Fumitaka
name: Schilke, Peter
name: Smith, Rowan J.
name: Mairs, Steve
name: Goodman, Alyssa
name: Maureira, María José
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: A unique filament is identified in the {\it Herschel} maps of the Orion A giant molecular cloud. The filament, which, we name the Stick, is ruler-straight and at an early evolutionary stage. Transverse position-velocity diagrams show two velocity components closing in on the Stick. The filament shows consecutive rings/forks in C$^{18}$O(1-0) channel maps, which is reminiscent of structures generated by magnetic reconnection. We propose that the Stick formed via collision-induced magnetic reconnection (CMR). We use the magnetohydrodynamics (MHD) code Athena++ to simulate the collision between two diffuse molecular clumps, each carrying an anti-parallel magnetic field. The clump collision produces a narrow, straight, dense filament with a factor of $>$200 increase in density. The production of the dense gas is seven times faster than free-fall collapse. The dense filament shows ring/fork-like structures in radiative transfer maps. Cores in the filament are confined by surface magnetic pressure. CMR can be an important dense-gas-producing mechanism in the Galaxy and beyond.
description: 39 pages, 31 figures, 2 tables, accepted by ApJ
Observations of the High Redshift Universe
Creators: name: Ellis, Richard S
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: (Abridged) In these lectures aimed for non-specialists, I review progress in understanding how galaxies form and evolve. Both the star formation history and assembly of stellar mass can be empirically traced from redshifts z~6 to the present, but how the various distant populations inter-relate and how stellar assembly is regulated by feedback and environmental processes remains unclear. I also discuss how these studies are being extended to locate and characterize the earlier sources beyond z~6. Did early star-forming galaxies contribute significantly to the reionization process and over what period did this occur? Neither theory nor observations are well-developed in this frontier topic but the first results presented here provide important guidance on how we will use more powerful future facilities.
description: To appear in `First Light in Universe', Saas-Fee Advanced Course 36, Swiss Soc. Astrophys. Astron. in press. 115 pages, 64 figures (see http://www.astro.caltech.edu/~rse/saas-fee.pdf for hi-res figs.) For lecture ppt files see http://obswww.unige.ch/saas-fee/preannouncement/course_pres/overview_f.html
Search for associations containing young stars (SACY). VIII. An updated census of spectroscopic binary systems exhibiting hints of non-universal multiplicity among their associations
Creators: name: Zúñiga-Fernández, Sebastián
name: Bayo, Amelia
name: Elliott, Paul
name: Zamora, Catalina
name: Corvalán, Gabriel
name: Haubois, Xavier
name: Corral-Santana, Jesús
name: Huelamo, Nuria
name: Sterzik, Michael
name: Torres, Carlos A. O.
name: Quast, Germano R.
name: Melo, Claudio
Publisher: name: Zenodo
Year: 2021
Subjects: Stellar systems, clusters, and associations
binaries: spectroscopic
stars: pre-main sequence
stars: formation
techniques: radial velocities
techniques: spectroscopic

description: Context. Nearby young associations offer one of the best opportunities for a detailed study of the properties of young stellar and substellar objects thanks to their proximity (<200 pc) and age (∼5-150 Myr). Previous works have identified spectroscopic (<5 au) binaries, close (5-1000 au) visual binaries, and wide or extremely wide (1000-100 000 au) binaries in the young associations. In most of the previous analyses, single-lined spectroscopic binaries (SB1) were identified based on radial velocities variations. However, this apparent variation may also be caused by mechanisms unrelated to multiplicity.
 Aims: We seek to update the spectroscopy binary fraction of the Search for Associations Containing Young stars (SACY) sample, taking into consideration all possible biases in our identification of binary candidates, such as activity and rotation.
 Methods: Using high-resolution spectroscopic observations, we produced ∼1300 cross-correlation functions (CCFs) to disentangle the previously mentioned sources of contamination. The radial velocity values we obtained were cross-matched with the literature and then used to revise and update the spectroscopic binary (SB) fraction in each object of the SACY association. In order to better describe the CCF profile, we calculated a set of high-order cross-correlation features to determine the origin of the variations in radial velocities.
 Results: We identified 68 SB candidates from our sample of 410 objects. Our results hint that at the possibility that the youngest associations have a higher SB fraction. Specifically, we found sensitivity-corrected SB fractions of 22-11+15% for ɛ Cha, 31-14+16% for TW Hya and 32-8+9% for β Pictoris, in contrast to the five oldest associations we have sampled (∼35-125 Myr) which are ∼10% or lower. This result seems independent of the methodology used to asses membership to the associations.
 Conclusions: The new CCF analysis, radial velocity estimates, and SB candidates are particularly relevant for membership revision of targets in young stellar associations. These targets would be ideal candidates for follow-up campaigns using high-resolution techniques to confirm binarity, resolve orbits, and, ideally, calculate dynamical masses. Additionally, if the results on the SB fraction in the youngest associations were confirmed, it could hint at a non-universal multiplicity among SACY associations.
Renormalized Thermal Entropy in Field Theory
Creators: name: Cacciatori, Sergio
name: Costa, Fabio
name: Piazza, Federico
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Standard entropy calculations in quantum field theory, when applied to a subsystem of definite volume, exhibit area-dependent UV divergences that make a thermodynamic interpretation troublesome. In this paper we define a renormalized entropy which is related with the Newton-Wigner position operator. Accordingly, whenever we trace over a region of space, we trace away degrees of freedom that are localized according to Newton-Wigner localization but not in the usual sense. We consider a free scalar field in d+1 spacetime dimensions prepared in a thermal state and we show that our entropy is free of divergences and has a perfectly sound thermodynamic behavior. In the high temperature/big volume limit our results agree with the standard QFT calculations once the divergent contributions are subtracted from the latter. In the limit of low temperature/small volume the entropy goes to zero but with a different dependence on the temperature.
description: 27 pages, final version
Random Unitary Representations of Surface Groups I: Asymptotic expansions
Creators: name: Magee, Michael
Publisher: name: arXiv
Year: 2021
Subjects: subject: Representation Theory (math.RT)
subject: Mathematical Physics (math-ph)
subject: Group Theory (math.GR)
subject: Geometric Topology (math.GT)
subject: Operator Algebras (math.OA)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 14H60, 20C30, 20C35, 22D10, 32G15, 46L54, 70S15

description: In this paper we study random representations of fundamental groups of surfaces into special unitary groups. The random model we use is based on a symplectic form on moduli space due to Atiyah, Bott, and Goldman. Let $Σ_{g}$ denote a topological surface of genus $g\geq2$. We establish the existence of a large $n$ asymptotic expansion, to any fixed order, for the expected value of the trace of any fixed element of $π_{1}(Σ_{g})$ under a random representation of $π_{1}(Σ_{g})$ into $\mathsf{SU}(n)$. Each such expected value involves a contribution from all irreducible representations of $\mathsf{SU}(n)$. The main technical contribution of the paper is effective analytic control of the entire contribution from irreducible representations outside finite sets of carefully chosen rational families of representations.
description: 45 pages
The Processing of Ambiguous Degree Constructions in German
Creators: name: Berezovskaya, Polina
name: Hörnig, Robin
Publisher: name: Universität Tübingen
Year: 2019
Subjects: subject: Komplexität , Semantische Analyse
subject: 400
subject: 430
subject: attributive comparatives
subject: complexity
subject: processing

description: Based on a thorough semantic analysis of German degree quantifiers within the degree approach (cf. e.g. von Stechow, 1984; Heim, 2001), we derived hypotheses on the processing of sentences of the form “A kennt(VERB.3SG) einen besseren(ADJ.COMP) B als C” (‘A knows a better B than C’). These sentences are ambiguous between the DP-internal reading, INT (A knows a B who is a better B than C) and the DP-external reading, EXT (A knows a B who is a better B than a B that C knows). We show that INT is less complex than EXT in several respects. From this we hypothesize that the difference in complexity affects processing such that (i) INT is preferred over EXT in reading the ambiguous sentence (Study 1), that the sentence, if disambiguated by context towards INT rather than EXT, (ii) is judged more acceptable (Study 2) and (iii) that INT takes less long to read than EXT (Study 3). The first hypothesis was confirmed, but not the second and the third one.
Life experiences of young adults with a chronic illness: an analyses of Crohn’s disease and colitis
Creators: name: Matthes, Glenn E.
Publisher: name: University of British Columbia
Year: 2009

description: What is the experience like for young adults living with Crohn's disease or colitis? This question provided the focus for interviews and written narratives of 10 participants in a study exploring the perceptions of, responses to, and management of the life experience of living with an illness. Qualitative approaches to research, involving phenomenological principles, guided the study. A synopsis of each individual participant’s interview and written narrative comprise a large part of the body of the thesis. Eight themes, established from the interviews and written narratives of all participants, describe the essence of the phenomenon.
Connecting explanations to representations: benefits of highlighting techniques in tutorial videos on students’ learning in organic chemistry
Creators: name: Rodemer, Marc
name: Eckhard, Julia
name: Graulich, Nicole
name: Bernholt, Sascha
Publisher: name: Taylor & Francis
Year: 2021
Subjects: subject: Biophysics
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Science Policy
subject: Plant Biology

description: Research in science education agrees that one of the key challenges of learners in the discipline is certainly connecting domain-specific representations to the underlying concepts. One way of supporting students to make applicable connections is using purposefully designed highlighting techniques in multimedia instructions. In order to examine the influence of different highlighting techniques on learning, 171 chemistry undergraduate students were provided with tutorial videos either with static, dynamic or without highlighting. The results show that students viewing tutorial videos with dynamic highlighting gave more sophisticated answers in direct retention tasks. Furthermore, results indicate that low prior knowledge is compensated by both static and dynamic highlighting techniques. This finding is supported by causal mediation analysis, which indicates that the effect of prior knowledge is moderated by the different highlighting techniques. Besides student learning outcomes, students’ evaluation of the different tutorial videos shows significant benefits of the highlighted instructions in terms of perceiving higher comprehensibility. The results support the use of appropriate highlighting techniques in instructional formats to foster a stronger link between conceptual knowledge and representations.
The Dos and Don'ts of Stellar Rotation with TESS
Creators: name: Avallone, Ellis A.
name: Tayar, Jamie
name: van Saders, Jennifer L.
name: Berger, Travis A.
name: Claytor, Zachary R.
Publisher: name: Zenodo
Year: 2021
Subjects: Cool Stars on the main sequence
Main sequence stars
Kraft Break
Stellar rotation
Rotation
TESS
Binary Evolution

description: Rotation is a complex function of mass, metallicity, binarity, and age in low-mass main sequence stars. Here, we show that we can measure rotation periods from lightcurves in the TESS SCVZ and use TESS lightcurves to identify other classes of stellar variability (e.g. pulsations). However, instrument systematics prevent the detection of rotation signals longer than the TESS orbital period of 13.7 days. We use these rotation periods, rotational velocities from the APOGEE spectroscopic survey, and radii inferred from Gaia to trace rotation as a function of evolution for stars around the Kraft Break (~1.25 solar masses). Additionally, comparing the distribution of detected stars in Kepler and TESS reveals key differences between stellar populations probed by these two missions, with TESS probing a significant population of young stars that were not present in the Kepler sample.
description: {"references": ["Berger, Travis et al. (2020a). AJ, 160, 108", "Berger, Travis et al. (2020b). arXiv:2001.07737", "Claytor, Zachary et al. (2020). ApJ, 888, 43", "Dixon, Don et al. (2020). arXiv:2005.00577", "Amard, L. et al. (2020). MNRAS, 499,3481", "Angus, Ruth et al. (2019). TheJournal of Open Source Software, 4, 1469", "van Saders, Jennifer et al. (2016). Nature, 529, 181", "van Saders, Jennifer L., & Pinsonneault, Marc H. (2013). ApJ, 776, 67", "van Saders, J. L. et al. (2019). ApJ, 872, 128"]}
An Experimental Comparison of Two Reinterpretation Strategies: Benefits and Challenges of Using Fictional Contexts in Experimental Studies
Creators: name: Bade, Nadine
name: Buscher, Frauke
Publisher: name: Universität Tübingen
Year: 2019
Subjects: subject: Zwang , Fiktion , Neubewertung
subject: 400
subject: 430
subject: Coercion
subject: fiction

description: The paper presents an experimental investigation of two different reinterpretation mechanisms using fictional contexts. First, we discuss the results of a rating study suggesting that fictional contexts allow for certain reinterpretation strategies that non-fictional contexts do not allow for. We also report on a follow-up self-paced reading study whose results are less clear. We hypothesize that the mixed results we observe are due to the fictional material. We discuss some methodological implications for future experimental research making use of fictional contexts.
Gravitational Lens Time Delays: A Statistical Assessment of Lens Model Dependences and Implications for the Global Hubble Constant
Creators: name: Oguri, Masamune
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Time delays between lensed multiple images have been known to provide an interesting probe of the Hubble constant, but such application is often limited by degeneracies with the shape of lens potentials. We propose a new statistical approach to examine the dependence of time delays on the complexity of lens potentials, such as higher-order perturbations, non-isothermality, and substructures. Specifically, we introduce a reduced time delay and explore its behavior as a function of the image configuration that is characterized by the asymmetry and opening angle of the image pair. In particular we derive a realistic conditional probability distribution. We find that the probability distribution is sensitive to the image configuration such that more asymmetric and/or smaller opening angle image pairs are more easily affected by perturbations on the primary lens potential. On average time delays of double lenses are less scattered than those of quadruple lenses. Furthermore, the realistic conditional distribution allows a new statistical method to constrain the Hubble constant. We find that 16 published time delay quasars constrain the Hubble constant to be H_0=70+/-6 km/s/Mpc, where the value and its error are estimated using jackknife resampling. After including rough estimates of the sizes of important systematic errors, we find H_0=68+/-6(stat.)+/-8(syst.) km/s/Mpc. The reasonable agreement with other estimates indicates the usefulness of our new approach as a cosmological and astrophysical probe, particularly in the era of large-scale synoptic surveys. (Abridged)
description: 16 pages, 8 figures, accepted for publication in ApJ; Version with full-resolution figures available at http://www.slac.stanford.edu/~oguri/files/tdmodel.pdf
Origin of the anomalous Hall effect in two-band chiral superconductors
Creators: name: Denys, M. D. E.
name: Brydon, P. M. R.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We consider the origin of the anomalous Hall effect in a general model of a clean two-band chiral superconductor. Within the Kubo formalism we derive an analytic expression for the high-frequency ac Hall conductivity valid close to the critical temperature. This expression involves two distinct gauge-invariant time-reversal-odd bilinear (TROB) functions involving the pairing potential and its Hermitian conjugate. We argue that the existence of at least one of these TROBs generically implies a nonzero ac Hall conductivity. The TROBs allow us to clarify the roles of intra- and interband pairing, and provide a straightforward criterion for a superconducting state to exhibit the anomalous Hall effect. We briefly exemplify our results with model calculations for a chiral $p$-wave pairing state in strontium ruthenate and a chiral $d$-wave pairing state on the honeycomb lattice.
description: 9 pages, 1 figure
The construction of masculinity: interviews into the experiences of men
Creators: name: Murphy, Lawrence James
Publisher: name: University of British Columbia
Year: 2009

description: The purpose of this study was to investigate the experience of being male from the perspective of a group of white middle class heterosexual men. A review of the literature reveals a dearth of research into the live experience of being male. This study begins to address that lack. As the aim of the study was to delve into the meaning of the experience of being male, a phenomenological method was employed. Five men were recruited from British Columbia. A semistructured interview was conducted with each man and the resulting transcriptions analyzed for common themes. Colaizi’s (1978) method of analysis produced 12 major and three minor themes. This set of themes was then returned to the men for validation. Themes included: expectations of economic responsibility and confidence and competence; experiences of conflicting role expectations, uncertainty about the rules of behaviour, and being perceived as one of the victimizers; and the feeling that part of a man’s role is to take responsibility for the safety and wellbeing of others.
Size dependence of the photoinduced magnetism and long-range ordering in Prussian blue analog nanoparticles of rubidium cobalt hexacyanoferrate
Creators: name: Pajerowski, D. M.
name: Meisel, M. W.
name: Frye, F. A.
name: Talham, D. R.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Nanoparticles of rubidium cobalt hexacyanoferrate (Rb$_j$Co$_k$[Fe(CN)$_6$]$_l \cdot n$H$_2$O) were synthesized using different concentrations of the polyvinylpyrrolidone (PVP) to produce four different batches of particles with characteristic diameters ranging from 3 to 13 nm. Upon illumination with white light at 5 K, the magnetization of these particles increases. The long-range ferrimagnetic ordering temperatures and the coercive fields evolve with nanoparticle size. At 2 K, particles with diameters less than approximately 10 nm provide a Curie-like magnetic signal.
description: 10 pages, 6 figures in text, expanded text and data
Using Lexical Semantics to Predict the Distributivity Potential of Verb Phrases in a Large Dataset
Creators: name: Glass, Lelia
Publisher: name: Universität Tübingen
Year: 2019
Subjects: subject: Kausativ , Korpus
subject: 400
subject: 420
subject: distributivity
subject: causatives
subject: experiments
subject: corpus

description: Applied to a plural subject (“Alice and Bob”), some predicates are understood distributively (individually true of each member of the subject: “Alice and Bob smiled” conveys that Alice smiled and Bob smiled); some are understood nondistributively (true of the subject as a whole, but not each member individually: “Alice and Bob met”); and some can be understood in both ways (“Alice and Bob opened the window”: distributive if they each individually opened it, nondistributive if they opened it jointly). This paper tackles the open question of which predicates are understood in which way(s) and why: Which other predicates act like “smile”, like “meet”, or like “open the window”? Researchers would agree that a verb phrase's distributivity potential depends on world knowledge about the event that it describes. Making that truism predictive, this paper presents an experimental study providing evidence consistent with several large-scale, theoretically-motivated generalizations in this realm.
Causal Loops and Collapse in the Transactional Interpretation of Quantum Mechanics
Creators: name: Marchildon, Louis
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Cramer's transactional interpretation of quantum mechanics is reviewed, and a number of issues related to advanced interactions and state vector collapse are analyzed. Where some have suggested that Cramer's predictions may not be correct or definite, I argue that they are, but I point out that the classical-quantum distinction problem in the Copenhagen interpretation has its parallel in the transactional interpretation.
description: Minor changes, plus a significant correction in the caption of Fig. 2; forthcoming in Physics Essays
Cross-Linguistic Interplay of Lexical Aspect and (Non-)Literalness
Creators: name: Martin, Fabienne
name: Falk, Ingrid
name: Köper, Maximilian
name: Springorum, Sylvia
name: Schulte Im Walde, Sabine
name: Stein, Achim
Publisher: name: Universität Tübingen
Year: 2019
Subjects: subject: Deutsch , Französisch , Verb , Vergleichende Sprachwissenschaft , Wortschatz
subject: 400
subject: 430
subject: 440
subject: lexical aspect
subject: complex verbs
subject: cross-linguistic comparison
subject: German
subject: French

description: This contribution studies correlations between the degree of literalness and the syntax and semantics of French and German verbs. Annotation tests for sentences with German verbs with and without particles and their French equivalents provide evidence for a correlation between particle verbs and non-literal senses, and, for French verbs more than for German verbs, between a shift from literal to non-literal use and a shift in lexical aspect. The last section proposes a preliminary theoretical account for the empirical findings based on specific components and properties of events.
Genericity in Greek: An Experimental Investigation
Creators: name: Lazaridou-Chatzigoga, Dimitra
name: Alexiadou, Artemis
Publisher: name: Universität Tübingen
Year: 2019
Subjects: subject: Bestimmtheit , Generizität , Griechisch
subject: 400
subject: 480
subject: definiteness
subject: genericity
subject: Greek

description: In this paper we present results from a context-acceptability judgment task that addressed genericity in Greek following a design used by Ionin et al. (2011). The task investigates two sources of genericity: (a) sentence-level genericity with a non-Well-Defined Kind (e.g., “a green lamp”) and (b) NP-level genericity with a WDK (e.g., “a dodo bird”) followed by a kind predicate (e.g., “be extinct”). Our results largely confirm the predictions and support Dayal’s (2004) theoretical account of genericity: definite singulars were rated higher with NP-level than with sentence-level genericity, definite plurals were rated equally high with both types of genericity, and modified indefinite singulars were rated higher with sentence-level than with NP-level genericity. With respect to the WDK restriction on definite singulars, even though the difference between the two conditions was significant, definite singulars with sentence-level genericity were rated higher than expected. This casts doubts on the universality WDK restriction, which would have to be addressed in future work.
NPI Intervention: Crosslinguistic Data
Creators: name: Klapheke, Alexander
name: Davidson, Kathryn
Publisher: name: Universität Tübingen
Year: 2019
Subjects: subject: Negativer Polaritätsausdruck , Vergleichende Sprachwissenschaft
subject: 400
subject: 420
subject: 440
subject: 450
subject: Polarity
subject: Intervention
subject: Factivity
subject: Crosslinguistic

description: It has been claimed that negative polarity items (NPIs) such as “any” and “ever” are blocked in factive environments in Romance languages, despite being licensed in English. We test this claim in a judgment study in English, Italian, and French, comparing NPIs in factive and non-factive environments. We find that, consistent with previous claims, this effect seems to exist in Italian and not English, but that, against expectation, French does not pattern with either language.
A Novel Semi-Supervised Data-Driven Method for Chiller Fault Diagnosis with Unlabeled Data
Creators: name: Li, Bingxu
name: Cheng, Fanyong
name: Zhang, Xin
name: Cui, Can
name: Cai, Wenjian
Publisher: name: arXiv
Year: 2020
Subjects: subject: Machine Learning (cs.LG)
subject: Systems and Control (eess.SY)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: In practical chiller systems, applying efficient fault diagnosis techniques can significantly reduce energy consumption and improve energy efficiency of buildings. The success of the existing methods for fault diagnosis of chillers relies on the condition that sufficient labeled data are available for training. However, label acquisition is laborious and costly in practice. Usually, the number of labeled data is limited and most data available are unlabeled. The existing methods cannot exploit the information contained in unlabeled data, which significantly limits the improvement of fault diagnosis performance in chiller systems. To make effective use of unlabeled data to further improve fault diagnosis performance and reduce the dependency on labeled data, we proposed a novel semi-supervised data-driven fault diagnosis method for chiller systems based on the semi-generative adversarial network, which incorporates both unlabeled and labeled data into learning process. The semi-generative adversarial network can learn the information of data distribution from unlabeled data and this information can help to significantly improve the diagnostic performance. Experimental results demonstrate the effectiveness of the proposed method. Under the scenario that there are only 80 labeled samples and 16000 unlabeled samples, the proposed method can improve the diagnostic accuracy to 84%, while the supervised baseline methods only reach the accuracy of 65% at most. Besides, the minimal required number of labeled samples can be reduced by about 60% with the proposed method when there are enough unlabeled samples.
Stability and stabilisation of the lattice Boltzmann method: Magic steps and salvation operations
Creators: name: Brownlee, R. A.
name: Gorban, A. N.
name: Levesley, J.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We revisit the classical stability versus accuracy dilemma for the lattice Boltzmann methods (LBM). Our goal is a stable method of second-order accuracy for fluid dynamics based on the lattice Bhatnager--Gross--Krook method (LBGK). The LBGK scheme can be recognised as a discrete dynamical system generated by free-flight and entropic involution. In this framework the stability and accuracy analysis are more natural. We find the necessary and sufficient conditions for second-order accurate fluid dynamics modelling. In particular, it is proven that in order to guarantee second-order accuracy the distribution should belong to a distinguished surface -- the invariant film (up to second-order in the time step). This surface is the trajectory of the (quasi)equilibrium distribution surface under free-flight. The main instability mechanisms are identified. The simplest recipes for stabilisation add no artificial dissipation (up to second-order) and provide second-order accuracy of the method. Two other prescriptions add some artificial dissipation locally and prevent the system from loss of positivity and local blow-up. Demonstration of the proposed stable LBGK schemes are provided by the numerical simulation of a 1D shock tube and the unsteady 2D-flow around a square-cylinder up to Reynolds number $\mathcal{O}(10000)$.
description: Significantly extended version with new LBM accuracy analysis and extended bibliography
Intervention Effects in NPI-Environments: A Case of Scope Incompatibility?
Creators: name: Freitag, Constantin
Publisher: name: Universität Tübingen
Year: 2019
Subjects: subject: Negativer Polaritätsausdruck , Numerale , Frage
subject: 400
subject: 430
subject: NPI
subject: intervention effect
subject: quantifiers
subject: wh-questions

description: Certain quantifiers have been suggested to be interveners in wh-questions and in NPI-licensing environments. The current study investigates NPI-licensing in German and presents evidence from acceptability judgments and self-paced reading which indicates that certain quantifiers indeed give rise to “intervention effects”. Surprisingly, however, the same effect was found in minimally different structures where the NPI was replaced by a non-NPI. We argue that these effects stem from scope incompatibilities of certain semantic operators and are independent of NPI-licensing.
W0830: an extremely cold, missing-link planetary-mass object at the low-mass end of the IMF
Creators: name: Bardalez Gagliuffi, Daniella
name: Faherty, Jacqueline
name: Schneider, Adam
name: Meisner, Aaron
name: Caselden, Dan
name: Colin, Guillaume
name: Goodman, Sam
name: Kirkpatrick, Davy
name: Kuchner, Marc
name: Gagne, Jonathan
name: Logsdon, Sarah
name: Burgasser, Adam
name: Allers, Katelyn
name: Debes, John
name: Wisniewski, John
name: Rothermich, Austin
name: Andersen, Nikolaj
name: Thevenot, Melina
name: Walla, Jim
Publisher: name: Zenodo
Year: 2021
Subjects: Very low mass stars
Brown dwarfs
Y dwarfs
Hubble Space Telescope
Spitzer Space Telescope
Citizen Science

description: Here we present an extremely cold, planetary-mass brown dwarf which bridges the temperature gap between the warmer Y dwarf population and the coldest brown dwarf ever discovered. W0830 was identified through the Backyard Worlds: Planet 9 citizen science collaboration, which brings together over 150,000 people around the world in identifying cold, fast-moving sources through coadded WISE images. We have characterized this object with Hubble and Spitzer Space Telescope follow-up photometry. The available evidence points to a ~Y1 source at Teff ~ 350 K with a planetary mass of 4-13Mjup, as extrapolated from the known Y dwarf population. This object joins a small, yet growing sample of “missing link” objects connecting brown dwarfs to giant planets in terms of temperature.
description: {"references": ["Bardalez Gagliuffi et al. (2020). WISEA J083011.95+283716.0: A Missing Link Planetary-mass Object. https://ui.adsabs.harvard.edu/abs/2020ApJ...895..145B/abstract", "Cushing et al. (2011). The Discovery of Y Dwarfs using Data from the Wide-field Infrared Survey Explorer (WISE). https://ui.adsabs.harvard.edu/abs/2011ApJ...743...50C/abstract", "Meisner et al. (2020a). Expanding the Y Dwarf Census with Spitzer Follow-up of the Coldest CatWISE Solar Neighborhood Discoveries. https://ui.adsabs.harvard.edu/abs/2020ApJ...889...74M/abstract", "Luhman (2014). Discovery of a ~250 K Brown Dwarf at 2 pc from the Sun. https://ui.adsabs.harvard.edu/abs/2014ApJ...786L..18L/abstract"]}
Fannie Mae's National Housing Survey Monthly Home Purchase Sentiment Index (HPSI) and Key Indicators - May, 2019 (a subset of the complete monthly Fannie Mae National Housing Survey)
Creators: name: Foundation, Fannie Mae
Publisher: name: Roper Center for Public Opinion Research
Year: 2019

description: Economy on right/wrong track (1); personal financial situation (1); good/bad time to buy a house (1); good/bad time to sell a house (1); home price changes (3); rental price changes (3); mortgage interest rate changes (1); ability to obtain a home mortgage today (1); current homeownership status (1); renting vs. buying a home in the future (1); concern about unemployment (1); change in income (1).
Dynamically Formed Black Hole Binaries: In-Cluster Versus Ejected Mergers
Creators: name: Anagnostou, Oliver
name: Trenti, Michele
name: Melatos, Andrew
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The growing number of black hole binary (BHB) mergers detected by the Laser Interferometer Gravitational-Wave Observatory (LIGO) have the potential to enable an unprecedented characterization of the physical processes and astrophysical conditions that govern the formation of compact binaries. In this paper, we focus on investigating the dynamical formation of BHBs in dense star clusters through a state-of-art set of 58 direct N-body simulations with N <= 200,000 particles which include stellar evolution, gravitational braking, orbital decay through gravitational radiation and galactic tidal interactions. The simulations encompass a range of initial conditions representing typical young globular clusters, including the presence of primordial binaries. The systems are simulated for ~ 12 Gyr. The dataset yields 117 BHB gravitational wave events, with 97 binaries merging within their host cluster, and 20 merging after having been ejected. Only 8% of all ejected BHBs merge within the age of the Universe. Systems in this merging subset tend to have smaller separations and larger eccentricities, as this combination of parameters results in greater emission of gravitational radiation. We confirm known trends from Monte Carlo simulations, such as the anti-correlation between the mass of the binary and age of the cluster. In addition, we highlight for the first time a difference at low values of the mass ratio distribution between in-cluster and ejected mergers. However, the results depend on assumptions on the strength of gravitational wave recoils, thus in-cluster mergers cannot be ruled out at a significant level of confidence. A more substantial catalogue of BHB mergers and a more extensive library of N-body simulations are needed to constrain the origin of the observed events.
description: accepted for publication in PASA
Self-affine Fractals Embedded in Spectra of Complex Networks
Creators: name: Yang, Huijie
name: Yin, Chuanyang
name: Zhu, Guimei
name: Li, Baowen
Publisher: name: arXiv
Year: 2008
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The scaling properties of spectra of real world complex networks are studied by using the wavelet transform. It is found that the spectra of networks are multifractal. According to the values of the long-range correlation exponent, the Hust exponent $H$, the networks can be classified into three types, namely, $H>0.5$, $H=0.5$ and $H<0.5$. All real world networks considered belong to the class of $H \ge 0.5$, which may be explained by the hierarchical properties.
description: 4 pages, 1 figure, accepted by Phys. Rev. E as rapid comm
Method for initial rotor design with coupling of power and loads
Creators: name: Loenbaek, Kenneth
name: Dam, Bjarke
name: Madsen, Jens Ingemann
name: Bak, Christian
Publisher: name: Zenodo
Year: 2019
Subjects: Initial Rotor design

description: We present our work on initial rotor design, where we investigate the optimal load distribution for different load constrains.
Solar Carbon Monoxide, Thermal Profiling, and the Abundances of C, O, and their Isotopes
Creators: name: Ayres, Thomas R.
name: Plymate, Claude
name: Keller, Christoph U.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: A solar photospheric "thermal profiling" analysis is presented, exploiting the infrared rovibrational bands of carbon monoxide (CO) as observed with the McMath-Pierce Fourier transform spectrometer (FTS) at Kitt Peak, and from above the Earth's atmosphere by the Shuttle-borne ATMOS experiment. Visible continuum intensities and center-limb behavior constrained the temperature profile of the deep photosphere, while CO center-limb behavior defined the thermal structure at higher altitudes. The oxygen abundance was self consistently determined from weak CO absorptions. Our analysis was meant to complement recent studies based on 3-D convection models which, among other things, have revised the historical solar oxygen (and carbon) abundance downward by a factor of nearly two; although in fact our conclusions do not support such a revision. Based on various considerations, an oxygen abundance of 700+/-100 ppm (parts per million relative to hydrogen) is recommended; the large uncertainty reflects the model sensitivity of CO. New solar isotopic ratios also are reported for 13C, 17O, and 18O.
description: 90 pages, 19 figures (some with parts "a", "b", etc.); to be published in the Astrophysical Journal Supplements
Semantic Influences on Syntactic Acceptability Ratings
Creators: name: Juzek, Tom S.
name: Häussler, Jana
Publisher: name: Universität Tübingen
Year: 2019
Subjects: subject: Grammatikalität , Akzeptanz , Verständlichkeit
subject: 400
subject: 420
subject: grammaticality
subject: acceptability
subject: intelligibility

description: A high prevalence of syntactic gradience is well attested, but a comprehensive explanation is still needed. In the present paper, we look into the question of whether semantic influences could account for parts of the observed gradience. Results from two experiments suggest that semantic influences can have a degrading effect on the acceptability of grammatical items. However, we did not observe that they had an ameliorating effect, which still leaves a good deal of the observed gradience in need of an explanation.
Gamma-ray and conversion-electron spectroscopy of the high-spin isomer in 145Sm
Creators: name: Gerathy, Matthew
name: Lane, Gregory
name: Stuchbery, Andrew
name: Dracoulis, George
name: Kibedi, Tibor
name: Akber, Aqeel
name: Bignell, Lindsey
name: Coombes, Ben
name: Dowie, Jackson
name: Gray, Timothy
name: Lee, Boon
name: McCormick, Brendan
name: Mitchell, Alan
name: Palalani, Nyaladzi
Publisher: name: arXiv
Year: 2020
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: Background: High-spin isomers at {\approx}9-MeV excitation energies have been reported in several N = 83 isotones near Z = 64. Spin and parity assignments of J{^π} = 49/2+ remain tentative for a number of these states in the odd-A nuclei. Purpose: To study the decay of the (49/2 +) high-spin isomer in 145 Sm, make firm spin and parity assignments to the isomer and states populated in its decay, and investigate the structure of the nucleus. Methods: The 145Sm isomer was populated in the 124Sn(26Mg,5n) reaction. Gamma-ray and conversion-electron data were collected using the Solenogam array. Results: A revised lifetime of t1/2 = 3.52(16) mus was measured for the high-spin isomer. Several new states have been added to the level scheme, and a new state at 8815 keV is proposed as the isomer, based on decay-property systematics, transition strengths, and spin and parity assignments. Firm spin and parity assignments have been made to states up to and including the isomer and the new level scheme is interpreted using shell-model calculations performed with the KShell program. Conclusions: The interpretation of the 49/2+ isomer as a deformed excitation of the core neutrons remains unchanged, although there has been a significant revision of the level scheme below the isomer, and hence significant reinterpretations of the lower-lying states.
Prospects to search for E6 isosinglet quarks in ATLAS
Creators: name: Mehdiyev, R.
name: Sultansoy, S.
name: Unel, G.
name: Yilmaz, M.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We consider pair production of new down-type isosinglet quarks originating from E_{6}, which is the favorite gauge symmetry group in superstring inspired GUT models. The study concentrates on the possibility of observing the pair production of the lightest of the new quarks, D, in the ATLAS detector at the forthcoming LHC accelerator, in the channel D\bar{D}\to ZjZj . Both signal and background events are studied using tree level event generators based on Monte Carlo techniques. The detector effects are taken into account using the ATLAS fast simulation tool, ATLFAST. It is shown that ATLAS can observe the D quark within the first year of low luminosity LHC operation if its mass is less than 650 GeV. For the case of two years of full luminosity running, 1 TeV can be reached with about three sigma significance.
description: 11 pages, short version of an ATLAS-PHYS-PUB-05-021 intended for publication. new version uploaded to appear as a scientific note. In new version, Poisson statistics is used instead of simple S/sqrt(B) used in previous version. Main results remain practically unchanged
The Effect of Noise in Dust Emission Maps on the Derivation of Column Density, Temperature and Emissivity Spectral Index
Creators: name: Schnee, S.
name: Kauffmann, J.
name: Goodman, A.
name: Bertoldi, F.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We have mapped the central 10'x10' of the dense core TMC-1C at 450, 850 and 1200 microns using SCUBA on the James Clerk Maxwell Telescope and MAMBO on the IRAM 30m telescope. We show that although one can, in principle, use images at these wavelengths to map the emissivity spectral index, temperature and column density independently, noise and calibration errors would have to be less than 2% to accurately derive these three quantities from a set of three emission maps. Because our data are not this free of errors, we use our emission maps to fit the dust temperature and column density assuming a constant value of the emissivity spectral index and explore the effects of noise on the derived physical parameters. We find that the derived extinction values for TMC-1C are large for a starless core (80 mag Av), and the derived temperatures are low (6 K) in the densest regions of the core, using our derived value of beta = 1.8.
description: 23 pages including 9 figures, accepted by ApJ
Effect of spin glass frustration on exchange bias in NiMn/CoFeB bilayers
Creators: name: Nayak, Sagarika
name: Manna, Palash Kumar
name: Singh, Braj Bhusan
name: Bedanta, Subhankar
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Exchange bias in ferromagnetic/antiferromagnetic systems can be explained in terms of various interfacial phenomena. Among these spin glass frustration can affect the magnetic properties in exchange bias systems. Here we have studied a NiMn/CoFeB exchange bias system in which spin glass frustration seems to play a crucial role. In order to account the effect of spin glass frustration on magnetic properties, we have performed the temperature and cooling field dependence of exchange bias. We have observed the decrease of exchange bias field (HEB) with cooling field (HFC) whereas there is not significant effect on coercive field (HC). Exponential decay of HEB and HC is found in these exchange bias systems. Further, training effect measurements have been performed to study the spin relaxation mechanism. We have fitted the training effect data with frozen and rotatable spin relaxation model. We have investigated the ratio of relaxation rate of interfacial rotatable and frozen spins in this study. The training effect data are also fitted with various other models. Further, we observed the shifting of peak temperature towards higher temperature with frequency from the ac susceptibility data.
description: 8 pages, 9 figures