cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Weyssenhoff fluid dynamics in general relativity using a 1+3 covariant approach
Creators: name: Brechet, S. D.
name: Hobson, M. P.
name: Lasenby, A. N.
Publisher: name: arXiv
Year: 2007
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The Weyssenhoff fluid is a perfect fluid with spin where the spin of the matter fields is the source of torsion in an Einstein-Cartan framework. Obukhov and Korotky showed that this fluid can be described as an effective fluid with spin in general relativity. A dynamical analysis of such a fluid is performed in a gauge invariant manner using the 1+3 covariant approach. This yields the propagation and constraint equations for the set of dynamical variables. A verification of these equations is performed for the special case of irrotational flow with zero peculiar acceleration by evolving the constraints.
description: 20 pages
title: On Network-like Structures in Business and Their Underlying Digital Technologies
Creators: name: Radszuwill, Sven
Publisher: name: University of Bayreuth
Year: 2018
Subjects: subject: Networks, Digital Technologies, IT Project Portfolios, Internet of Things, Blockchain
subject: 330

description: Network-like structures exist everywhere and have many and different facets. In combination with emerging digital technologies, new network structures develop, provide new opportunities, and pose new risks to organizations. In this thesis, I provide a brief overview on the various network types and then derive a general approach for organizations to handle networks. The three-step RAS approach proposes to recognize networks as networks (step 1 – R), analyze them by adhering to their specific properties (step 2 – A), and shape their development according to an organization’s goals (step 3 – S). For each step, the RAS approach comes with specific guidelines to consider key aspects of network structures. 
I then introduce the four research papers included in this thesis and outline how they contribute to the RAS approach. Research papers 1 and 2, Forging a Double-edged Sword: Resource Synergies and Dependencies in Complex IT Project Portfolios and Modeling Project Criticality in IT Project Portfolios, recognize IT project portfolios as IT project networks and analyze them particularly regarding their interactions. In research paper 1, we analyze IT projects and their resource synergies and dependencies using alpha centrality. In research paper 2, we provide an approach to compute the risk exposure of each project within an IT project network using Bayesian network modeling. With both research papers, we provide new approaches that look at IT project portfolios from a network perspective, i.e. we consider projects and the interactions between them. Research paper 3, When Your Thing Won’t Behave: Security Governance in the Internet of Things, analyzes the security risk of technology platform use in the Internet of Things (IoT). We model the risks of technology platform use, outline and discuss the model’s parameters, and derive governance implications that can help to shape technology platform use’s development in IoT. Research paper 4, Blockchain Won’t Kill the Banks: Why Disintermediation Doesn’t Work in International Trade Finance, analyzes the current process of a letter of credit and proposes an improved, re-engineered process that leverages the potentials of blockchain technology and can change existing market structures.
Isonemal Prefabrics with Perpendicular Axes of Symmetry
Creators: name: Thomas, R. S. D.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 52C20, 05B45

description: This paper continues the refinement of Richard Roth's taxonomy of isonemal weaving designs through types 11--32 of the 39 in order to solve three problems for those designs: which designs exist in various sizes, which prefabrics can be doubled and remain isonemal, and which can be halved and remain isonemal.
description: 38 pages, 17 figures, 3 tables
Market-Oriented Cloud Computing: Vision, Hype, and Reality for Delivering IT Services as Computing Utilities
Creators: name: Buyya, Rajkumar
name: Yeo, Chee Shin
name: Venugopal, Srikumar
Publisher: name: arXiv
Year: 2008
Subjects: subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: FOS: Computer and information sciences
subject: C.2.4

description: This keynote paper: presents a 21st century vision of computing; identifies various computing paradigms promising to deliver the vision of computing utilities; defines Cloud computing and provides the architecture for creating market-oriented Clouds by leveraging technologies such as VMs; provides thoughts on market-based resource management strategies that encompass both customer-driven service management and computational risk management to sustain SLA-oriented resource allocation; presents some representative Cloud platforms especially those developed in industries along with our current work towards realising market-oriented resource allocation of Clouds by leveraging the 3rd generation Aneka enterprise Grid technology; reveals our early thoughts on interconnecting Clouds for dynamically creating an atmospheric computing environment along with pointers to future community research; and concludes with the need for convergence of competing IT paradigms for delivering our 21st century vision.
description: 9 pages; GRIDS Lab Technical Report, Aug 2008
SPORT HISTORISCH (Kanusport): Wildwasser Europa-Cup 1974: ERGEBNISSE WW-Abfahrt (Gesamtwertung und 3. Wertungslauf Garmisch-Partenkirchen)
Creators: name: ZEILNER FRANZ
Publisher: name: Zenodo
Year: 1974
Subjects: Kanusport, Wildwasserrennsport, WW-Europacup, WW-Abfahrt, Lesse, Passer, Loisach, Garmisch-Partenkirchen, Sportfunktionäre, Sport Europa, Sport Österreich

description: Sportgeschichte, Geschichte des Kanusports, Wildwasserrennsport, Wildwasser Abfahrt Historisches Dokument zur Sportgeschichte, historisches Dokument zur Geschichte des Kanusports Erstmals in der Geschichte des Kanusports: Beginn des Wildwasser-Europacups 1974 Gesamtergebnisse WW-Europa Cup 1974 WW-Abfahrt: Damen und Herrenbewerbe, alle Bootsklassen und Athlet/innen, Sportfunktionäre Gesamtergebnisse 3.Wertungslauf am 13.Juni 1974 in Garmisch-Partenkirchen auf der Loisach
Panicum 1984-2016 MaxEnt Results
Creators: name: Frailey, Anna
Publisher: name: figshare
Year: 2021
Subjects: subject: Plant Biology
subject: FOS: Biological sciences
subject: Atmospheric Sciences
subject: FOS: Earth and related environmental sciences

description: Panicum 1984-2016 MaxEnt Results
Interpersonal trust and group psychotherapy : an outcome study
Creators: name: Tognazzini, Paula Mary
Publisher: name: University of British Columbia
Year: 2010

description: This study examined the effects of an intensive group psychotherapy program on selected patients' interpersonal trust as measured by the Interpersonal Trust Scale. A review of the literature indicated that interpersonal trust was a multifarious construct which needed to be further developed and understood. This study used a quasi-experimental control group design. Data were obtained from twenty patients who had been referred to an intensive group psychotherapy program. Ten patients who completed this program were assigned to the experimental group and ten patients who did not enter the program were assigned to the control group. The Interpersonal Trust Scale was given to all the patients at the time of assessment and six to eight weeks later. The data were analyzed using non-parametric statistics. The results indicated that the group psychotherapy program had no statistically significant effect on selected patients' interpersonal trust as measured by the Interpersonal Trust Scale. A discussion of the findings and recommendations for further study were included.
On the nontrivial projection problem
Creators: name: Szarek, Stanislaw J.
name: Tomczak-Jaegermann, Nicole
Publisher: name: arXiv
Year: 2008
Subjects: subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: 46B20 (Primary), 46B07, 52A21 (Secondary)

description: The Nontrivial Projection Problem asks whether every finite-dimensional normed space of dimension greater than one admits a well-bounded projection of non-trivial rank and corank or, equivalently, whether every centrally symmetric convex body (of arbitrary dimension greater than one) is approximately affinely equivalent to a direct product of two bodies of non-trivial dimension. We show that this is true "up to a logarithmic factor."
description: 17 pages
Sorghastrum 1984-2016 MaxEnt Results
Creators: name: Frailey, Anna
Publisher: name: figshare
Year: 2021
Subjects: subject: Plant Biology
subject: FOS: Biological sciences
subject: Atmospheric Sciences
subject: FOS: Earth and related environmental sciences

description: Sorghastrum 1984-2016 MaxEnt Results
Pseudo-Hermitian Random Matrix Models: General Formalism
Creators: name: Feinberg, Joshua
name: Riser, Roman
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mathematical Physics (math-ph)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: High Energy Physics - Theory (hep-th)
subject: Probability (math.PR)
subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: Pseudo-hermitian matrices are matrices hermitian with respect to an indefinite metric. They can be thought of as the truncation of pseudo-hermitian operators, defined over some Krein space, together with the associated metric, to a finite dimensional subspace. As such, they can be used, in the usual spirit of random matrix theory, to model chaotic or disordered PT-symmetric quantum systems, or their gain-loss-balanced classical analogs, in the phase of broken PT-symmetry. The eigenvalues of pseudo-hermitian matrices are either real, or come in complex-conjugate pairs. In this paper we introduce a family of pseudo-hermitian random matrix models, depending parametrically on their metric. We apply the diagrammatic method to obtain its averaged resolvent and density of eigenvalues as explicit functions of the metric, in the limit of large matrix size $N$. As a concrete example, which is essentially an ensemble of elements of the non-compact unitary Lie algebra, we choose a particularly simple set of metrics, and compute the resulting resolvent and density of eigenvalues in closed form. The spectrum consists of a finite fraction of complex eigenvalues, which occupy uniformly two two-dimensional blobs, symmetric with respect to the real axis, as well as the complimentary fraction of real eigenvalues, condensed in a finite segment, with a known non-uniform density. The numbers of complex and real eigenvalues depend on the signature of the metric, that is, the numbers of its positive and negative eigenvalues. We have also carried thorough numerical analysis of the model for these particular metrics. Our numerical results converge rapidly towards the asymptotic analytical large-$N$ expressions.
description: 50 pages, 4 figures. Revised version with corrected typos
Basic parameters of three star clusters in the Small Magellanic Cloud: Kron 11, Kron 63 and NGC 121
Creators: name: Baume, G.
name: Noël, N. E. D.
name: Costa, E.
name: Carraro, G.
name: Méndez, R. A.
name: Pedreros, M. H.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present observations for three star clusters, Kron 11, Kron 63 and NGC 121, in the Small Magellanic Cloud. We have studied their structure and derived their fundamental parameters by means of their luminosity functions, their color magnitude diagrams and the Padova suite of isochrones. NGC 121 is a well studied object, for which we confirm previous evidence about its old age and low metal content, and have found that it is undergoing mass segregation. Kron 11 and Kron 63 are poorly populated clusters which had never been studied so far. Kron 11 is several gigayears younger than NGC 121, while Kron 63 is basically a very young star aggregate. Both clusters are immersed in dense stellar fields which share the same population properties, suggesting that in their cases, cluster ages are consistent with typical ages of field stars.
description: 9 pages; 7 figures, MNRAS paper
Surface Operators and Knot Homologies
Creators: name: Gukov, Sergei
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Geometric Topology (math.GT)
subject: Quantum Algebra (math.QA)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: Topological gauge theories in four dimensions which admit surface operators provide a natural framework for realizing homological knot invariants. Every such theory leads to an action of the braid group on branes on the corresponding moduli space. This action plays a key role in the construction of homological knot invariants. We illustrate the general construction with examples based on surface operators in N=2 and N=4 twisted gauge theories which lead to a categorification of the Alexander polynomial, the equivariant knot signature, and certain analogs of the Casson invariant. This paper is based on a lecture delivered at the International Congress on Mathematical Physics 2006, Rio de Janeiro, and at the RTN Workshop 2006, Napoli.
description: 37 pages. Based on a talk given at the ICMP 2006 and at the RTN Workshop 2006
Mitochondrial Autophagy and Cell Survival is Regulated by the Circadian Clock Gene in Cardiac Myocytes during Ischemic Stress
Creators: name: Rabinovich-Nikitin, Inna
name: Rasouli, Mina
name: Reitz, Cristine J.
name: Posen, Illana
name: Margulets, Victoria
name: Dhingra, Rimpy
name: Khatua, Tarak N.
name: Thliveris, James A.
name: Martino, Tami A.
name: Kirshenbaum, Lorrie A.
Publisher: name: Taylor & Francis
Year: 2021
Subjects: subject: Biochemistry
subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Neuroscience
subject: Physiology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences

description: Cardiac function is highly reliant on mitochondrial oxidative metabolism and quality control. The circadian Clock gene is critically linked to vital physiological processes including mitochondrial fission, fusion and bioenergetics; however, little is known of how the Clock gene regulates these vital processes in the heart. Herein, we identified a putative circadian CLOCK-mitochondrial interactome that gates an adaptive survival response during myocardial ischemia. We show by transcriptome and gene ontology mapping in CLOCK Δ19/Δ19 mouse that Clock transcriptionally coordinates the efficient removal of damaged mitochondria during myocardial ischemia by directly controlling transcription of genes required for mitochondrial fission, fusion and macroautophagy/autophagy. Loss of Clock gene activity impaired mitochondrial turnover resulting in the accumulation of damaged reactive oxygen species (ROS)-producing mitochondria from impaired mitophagy. This coincided with ultrastructural defects to mitochondria and impaired cardiac function. Interestingly, wild type CLOCK but not mutations of CLOCK defective for E-Box binding or interaction with its cognate partner ARNTL/BMAL-1 suppressed mitochondrial damage and cell death during acute hypoxia. Interestingly, the autophagy defect and accumulation of damaged mitochondria in CLOCK-deficient cardiac myocytes were abrogated by restoring autophagy/mitophagy. Inhibition of autophagy by ATG7 knockdown abrogated the cytoprotective effects of CLOCK. Collectively, our results demonstrate that CLOCK regulates an adaptive stress response critical for cell survival by transcriptionally coordinating mitochondrial quality control mechanisms in cardiac myocytes. Interdictions that restore CLOCK activity may prove beneficial in reducing cardiac injury in individuals with disrupted circadian CLOCK.
Asterinidae Gray 1840
Creators: name: O'Loughlin, P. Mark
name: Waters, Jonathan M.
Publisher: name: Zenodo
Year: 2004
Subjects: Biodiversity
Taxonomy
Animalia
Echinodermata
Asteroidea
Valvatida
Asterinidae

description: Asterinidae Gray, 1840
Synonymy. See Clark and Downey, 1992.
Diagnosis. See Clark and Downey, 1992.
Genera. See Table 2.
Remarks. We do not revise the family diagnosis of Clark and Downey (1992). Changes to the list of genera in A.M. Clark (1993) are: Cryptasterina Dartnall et al., 2003, Meridiastra O’Loughlin, 2002, Aquilonastra O’Loughlin gen. nov., Indianastra O’Loughlin gen. nov., Parvulastra O’Loughlin gen. nov. and Pseudopatiria O’Loughlin gen. nov. are added; Allopatiria Verrill, 1913 is a junior synonym of Asterina Nardo, 1834; Patiria Gray, 1840 is raised out of synonymy with Asterina; Manasterina H.L. Clark, 1938 is a junior synonym of Disasterina Perrier, 1875; Paxillasterina A.M. Clark, 1983 is a junior synonym of Asterinides Verrill, 1913, which is maintained as a valid genus; and Asterinopsis Verrill, 1913 and Desmopatiria Verrill, 1913 are rejected.
We agree with H.L. Clark (1938) that Asterinopsis Verrill, 1913 is nomen dubium. Verrill (1913) designated Asterias penicillaris Lamarck, 1816 (Indo-Pacific) the type species, and assigned Asterina pilosa Perrier, 1881 (West Indies) and Asterina lymani Perrier, 1881 (synonymous according to Clark and Downey, 1992) to Asterinopsis. Fisher (1919) added Nepanthia pedicellaris Fisher, 1913 to Asterinopsis. Mortensen (1933) judged that the type of A. penicillaris was lost and that no reliable specimens or image were available. H.L. Clark (1938, 1946) pointed out that Mortensen’s case for the dubious state of penicillaris would render Asterinopsis also dubious. He further pointed out that Asterinopsis included both West Indian and Indo-Pacific species. A.M. Clark (1993) awaited reassessment, and listed N. pedicellaris and A. pilosa under Asterinopsis. In this work N. pedicellaris is referred to Nepanthia and A. pilosa is assigned to Asterinides.
A.M. Clark (1993) listed Desmopatiria Verrill, 1913, but noted “validity doubtful since identity of type species doubtful”. The genus was erected for the new species D. flexilis Verrill, 1913. It was described from a single dry specimen, without a label, found in the YPM collections with some asteroids from Chile. A recent search of the YPM collections by Eric Lazo-Wasem (pers. comm.) failed to find the specimen. No subsequent specimen has been referred to the species or genus. In the absence of both type specimen and record of type locality, the species D. flexilis and genus Desmopatiria are judged to be nomina nuda.
description: Published as part of O'Loughlin, P. Mark & Waters, Jonathan M., 2004, A molecular and morphological revision of genera of Asterinidae (Echinodermata: Asteroidea), pp. 1-40 in Memoirs of Museum Victoria 61 (1) on pages 5-7, DOI: 10.24199/j.mmv.2004.61.1, http://zenodo.org/record/10665495
Andropogon 1950-2016 MaxEnt Results
Creators: name: Frailey, Anna
Publisher: name: figshare
Year: 2021
Subjects: subject: Plant Biology
subject: FOS: Biological sciences
subject: Atmospheric Sciences
subject: FOS: Earth and related environmental sciences

description: Andropogon 1950-2016 MaxEnt Results
Hyperbolic embedding of brain networks detects regions disrupted by neurodegeneration in Alzheimer's disease
Creators: name: Longhena, Alice
name: Guillemaud, Martin
name: Fallani, Fabrizio De Vico
name: Migliaccio, Raffaella Lara
name: Chavez, Mario
Publisher: name: arXiv
Year: 2024
Subjects: subject: Neurons and Cognition (q-bio.NC)
subject: Quantitative Methods (q-bio.QM)
subject: FOS: Biological sciences

description: Graph theoretical methods have proven valuable for investigating alterations in both anatomical and functional brain connectivity networks during Alzheimer's disease (AD). Recent studies suggest that representing brain networks in a suitable geometric space can better capture their connectivity structure. This study introduces a novel approach to characterize brain connectivity changes using low dimensional, informative representations of networks in a latent geometric space. Specifically, the networks are embedded in a polar representation of the hyperbolic plane, the hyperbolic disk. Here, we use a geometric score, entirely based on the computation of distances between nodes in the latent space, to measure the effect of a perturbation on the nodes. Precisely, the score is a local measure of distortion in the geometric neighborhood of a node following a perturbation. The method is applied to a brain network dataset of patients with AD and healthy participants, derived from diffusion weighted (DWI) and functional (fMRI) magnetic resonance imaging scans. We show that, compared with standard graph measures, our method more accurately identifies the brain regions most affected by neurodegeneration. Notably, the abnormalities detected in memory related and frontal areas are robust across multiple brain parcellation scales. Finally, our findings suggest that the geometric perturbation score could serve as a potential biomarker for characterizing the progression of the disease.
Assessment method for photo-induced waveguides
Creators: name: Chauvet, M.
name: Fu, G.
name: Salamo, G.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: A method to probe the guiding characteristics of waveguides formed in real-time is proposed and evaluated. It is based on the analysis of the time dependent light distribution observed at the exit face of the waveguide while progressively altering its index profile and probed by a large diameter optical beam. A beam propagation method is used to model the observed dynamics. The technique is applied to retrieve the properties of soliton-induced waveguides.
Higgs scalar potential coupled to gravity in the exponential parametrization in arbitrary gauge
Creators: name: Ohta, Nobuyoshi
name: Yamada, Masatoshi
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study the parametrization and gauge dependences in the Higgs field coupled to gravity in the context of asymptotic safety. We use the exponential parametrization to derive the fixed points for the cosmological constant, Planck mass, Higgs mass and its coupling, keeping arbitrary gauge parameters $α$ and $β$, and compare the results with the linear split. We find that the beta functions for the Higgs potential are expressed in terms of redefined Planck mass such that the apparent gauge dependence is absent. Only the trace mode of the gravity fluctuations couples to the Higgs potential and it tends to decouple in the large $β$ limit, but the anomalous dimension becomes large, invalidating the local potential approximation. This gives the limitation of the exponential parametrization. There are also singularities for some values of the gauge parameters but well away from these, we find rather stable fixed points and critical exponents. We thus find that there are regions for the gauge parameters to give stable fixed points and critical exponents against the change of gauge parameters. The Higgs coupling is confirmed to be irrelevant for the reasonable choice of gauge parameters.
description: 49 pages, 13 figures, Version published in PRD
Coxeter group structure of cosmological billiards on compact spatial manifolds
Creators: name: Henneaux, Marc
name: Persson, Daniel
name: Wesley, Daniel H.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We present a systematic study of the cosmological billiard structures of Einstein-p-form systems in which all spatial directions are compactified on a manifold of nontrivial topology. This is achieved for all maximally oxidised theories associated with split real forms, for all possible compactifications as defined by the de Rham cohomology of the internal manifold. In each case, we study the Coxeter group that controls the dynamics for energy scales below the Planck scale as well as the relevant billiard region. We compare and contrast them with the Weyl group and fundamental domain that emerge from the general BKL analysis. For generic topologies we find a variety of possibilities: (i) The group may or may not be a simplex Coxeter group; (ii) The billiard region may or may not be a fundamental domain. When it is not a fundamental domain, it can be described as a sequence of pairwise adjacent chambers, known as a gallery, and the reflections in the billiard walls provide a non-standard presentation of the Coxeter group. We find that it is only when the Coxeter group is a simplex Coxeter group, and the billiard region is a fundamental domain, that there is a correspondence between billiard walls and simple roots of a Kac-Moody algebra, as in the general BKL analysis. For each compactification we also determine whether or not the resulting theory exhibits chaotic dynamics.
description: 51 pages. Typos corrected. References added. Submitted for publication
Gravitational Collapse in the Post-Inflationary Universe
Creators: name: Eggemeier, Benedikt
name: Schwabe, Bodo
name: Niemeyer, Jens C.
name: Easther, Richard
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The Universe may pass through an effectively matter-dominated epoch between inflation and Big Bang Nucleosynthesis during which gravitationally bound structures can form on subhorizon scales. In particular, the inflaton field can collapse into inflaton halos, forming "large scale" structure in the very early universe. We combine N-body simulations with high-resolution zoom-in regions in which the non-relativistic Schrödinger-Poisson equations are used to resolve the detailed, wave-like structure of inflaton halos. Solitonic cores form inside them, matching structure formation simulations with axion-like particles in the late-time universe. We denote these objects \textit{inflaton stars}, by analogy with boson stars. Based on a semi-analytic formalism we compute their overall mass distribution which shows that some regions will reach overdensities of $10^{15}$ if the early matter-dominated epoch lasts for 20 $e$-folds. The radii of the most massive inflaton stars can shrink below the Schwarzschild radius, suggesting that they could form primordial black holes prior to thermalization.
description: 9 pages, 6 figures, accepted by PRD
A Payload Optimization Method for Federated Recommender Systems
Creators: name: Khan, Farwa K.
name: Flanagan, Adrian
name: Tan, Kuan E.
name: Alamgir, Zareen
name: Ammad-Ud-Din, Muhammad
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (cs.LG)
subject: Artificial Intelligence (cs.AI)
subject: Information Retrieval (cs.IR)
subject: FOS: Computer and information sciences

description: We introduce the payload optimization method for federated recommender systems (FRS). In federated learning (FL), the global model payload that is moved between the server and users depends on the number of items to recommend. The model payload grows when there is an increasing number of items. This becomes challenging for an FRS if it is running in production mode. To tackle the payload challenge, we formulated a multi-arm bandit solution that selected part of the global model and transmitted it to all users. The selection process was guided by a novel reward function suitable for FL systems. So far as we are aware, this is the first optimization method that seeks to address item dependent payloads. The method was evaluated using three benchmark recommendation datasets. The empirical validation confirmed that the proposed method outperforms the simpler methods that do not benefit from the bandits for the purpose of item selection. In addition, we have demonstrated the usefulness of our proposed method by rigorously evaluating the effects of a payload reduction on the recommendation performance degradation. Our method achieved up to a 90\% reduction in model payload, yielding only a $\sim$4\% - 8\% loss in the recommendation performance for highly sparse datasets
description: 15 pages, 3 figures, 4 tables
In search of RR Lyrae type stars in eclipsing binary systems. OGLE052218.07-692827.4: an optical blend
Creators: name: Prsa, A.
name: Guinan, E. F.
name: Devinney, E. J.
name: Engle, S. G.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: During the OGLE-2 operation, Soszynski et al. (2003) found 3 LMC candidates for an RR Lyr-type component in an eclipsing binary system. Two of those have orbital periods that are too short to be physically plausible and hence have to be optical blends. For the third, OGLE052218.07-692827.4, we developed a model of the binary that could host the observed RR Lyr star. After being granted HST/WFPC2 time, however, we were able to resolve 5 distinct sources within a 1.3" region that is typical of OGLE resolution, proving that OGLE052218.07-692827.4 is also an optical blend. Moreover, the putative eclipsing binary signature found in the OGLE data does not seem to correspond to a physically plausible system; the source is likely another background RR Lyr star. There are still no RR Lyr stars discovered so far in an eclipsing binary system.
description: 4 pages, accepted to A&A
DATASET: Impact of school gardens and complementary nutrition education in Burkina Faso
Creators: name: Schreinemachers, Pepijn
name: Ouedraogo, Mamounata Sandaogo
name: Diagbouga, Serge
name: Thiombiano, Amadou
name: Kouamé, Serge Rodrigue
name: Sobgui, Caroline Makamto
name: Chen, Hsiao-Pu
name: Yang, Ray-Yu
Publisher: name: Unknown
Year: 0
Subjects: subject: CHILDREN
subject: EVALUATION
subject: MALNUTRITION
subject: FOOD BEHAVIOR
subject: NUTRITION SENSITIVE AGRICULTURE
subject: RANDOMIZED CONTROLLED TRIAL

description: This study evaluates the combined impact of school vegetable gardens linked to complementary nutrition education on the nutritional awareness, knowledge, perceptions, and eating behavior of 8–14-year-old schoolchildren in Burkina Faso. The study uses a repeated cluster randomized controlled trial and a sample of 30 schools and 1,760 schoolchildren. The results show a small but significant (p < 0.05) increase in knowledge of sustainable agriculture (+5.0%) and knowledge of food and nutrition (+6.6%), but no significant increase in other outcome indicators including fruit and vegetable consumption. More caution is needed in the promotion of school gardens for improving child nutrition in very low income countries.
Spinning Black Hole Scattering at $\mathcal{O}(G^3 S^2)$: Casimir Terms, Radial Action and Hidden Symmetry
Creators: name: Akpinar, Dogan
name: Cordero, Fernando Febres
name: Kraus, Manfred
name: Ruf, Michael S.
name: Zeng, Mao
Publisher: name: arXiv
Year: 2024
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We resolve subtleties in calculating the post-Minksowskian dynamics of binary systems, as a spin expansion, from massive scattering amplitudes of fixed finite spin. In particular, the apparently ambiguous spin Casimir terms can be fully determined from the gradient of the spin-diagonal part of the amplitudes with respect to $S^2 = -s(s+1)\hbar^2$, using an interpolation between massive amplitudes with different spin representations. From two-loop amplitudes of spin-0 and spin-1 particles minimally coupled to gravity, we extract the spin Casimir terms in the conservative scattering angle between a spinless and a spinning black hole at $\mathcal{O}(G^3 S^2)$, finding agreement with known results in the literature. This completes an earlier study [Phys. Rev. Lett. 130 (2023), 021601] that calculated the non-Casimir terms from amplitudes. We also illustrate our methods using a model of spinning bodies in electrodynamics, finding agreement between scattering amplitude predictions and classical predictions in a root-Kerr electromagnetic background up to $\mathcal{O}(α^3 S^2)$. For both gravity and electrodynamics, the finite part of the amplitude coincides with the two-body radial action in the aligned spin limit, generalizing the amplitude-action relation beyond the spinless case. Surprisingly, the two-loop amplitude displays a hidden spin-shift symmetry in the probe limit, which was previously observed at one loop. We conjecture that the symmetry holds to all orders in the coupling constant and is a consequence of integrability of Kerr orbits in the probe limit at the first few orders in spin.
description: 45 pages, 3 figures. v2: journal published version + additional typo corrections
Quantitative proteomic analysis of temporal lysosomal proteome and the impact of the KFERQ-like motif and LAMP2A in lysosomal targeting
Creators: name: Kacal, Merve
name: Zhang, Boxi
name: Hao, Yuqing
name: Norberg, Erik
name: Vakifahmetoglu-Norberg, Helin
Publisher: name: Taylor & Francis
Year: 2021
Subjects: subject: Biophysics
subject: Biochemistry
subject: 29999 Physical Sciences not elsewhere classified
subject: FOS: Physical sciences
subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Neuroscience
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Immunology
subject: FOS: Clinical medicine
subject: Cancer
subject: 111714 Mental Health
subject: FOS: Health sciences

description: Autophagic pathways are regulated mechanisms that play important roles in lysosome-mediated cellular degradation. Yet, the contribution of different autophagic pathways in lysosomal targeting, and characterization of the extent and specificity in their degradome remains largely uncharacterized. By undertaking a multiplex quantitative mass spectrometry approach, we have previously analyzed the lysosomal proteome during chaperone-mediated autophagy (CMA)-stimulated conditions in cancer cells. Here, we have extended our multiplex quantitative mass spectrometry and bioinformatics analysis on the proteome from isolated lysosomes to gain a comprehensive view of the temporal enriched lysosomal content upon non-macroautophagy-activated conditions. In parallel, we describe the functional dependency of LAMP2A on, and to what degree the presence of KFERQ-like motifs in proteins influences, their lysosomal targeting. These findings establish a framework for a better understanding of the degradome mediated by autophagic pathways beyond macroautophagy, and present characterization of the impact of LAMP2A in lysosomal targeting in cancer cells. Abbreviations: CMA: chaperone-mediated autophagy; ER: endoplasmic reticulum; EIF4A1: eukaryotic translation initiation factor 4A1; eMI: endosomal microautophagy; FC: fold change; GO: gene ontology; ISR: integrated stress response; LAMP2A: lysosomal associated membrane protein 2A; MA: macroautophagy; MI: microautophagy; MS: mass spectrometry; PCA: principal component analysis; TAX1BP1: Tax1 binding protein 1.
Strange attractors in periodically-kicked degenerate Hopf bifurcations
Creators: name: Ott, William
Publisher: name: arXiv
Year: 2007
Subjects: subject: Dynamical Systems (math.DS)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 37D45; 37C40

description: We prove that spiral sinks (stable foci of vector fields) can be transformed into strange attractors exhibiting sustained, observable chaos if subjected to periodic pulsatile forcing. We show that this phenomenon occurs in the context of periodically-kicked degenerate supercritical Hopf bifurcations. The results and their proofs make use of a new multi-parameter version of the theory of rank one maps developed by Wang and Young.
description: 16 pages
Dynamical and Atmospheric Characterization of the Substellar Companion HD 33632 Ab from Direct Imaging, Astrometry, and Radial-Velocity Data
Creators: name: Morsy, Mona El
name: Currie, Thayne
name: Bovie, Danielle
name: Kuzuhara, Masayuki
name: Lacy, Brianna
name: Li, Yiting
name: Tobin, Taylor
name: Brandt, Timothy
name: Chilcote, Jeffrey
name: Guyon, Olivier
name: Groff, Tyler
name: Lozi, Julien
name: Vievard, Sebastien
name: Deo, Vincent
name: Skaf, Nour
name: Bouchy, Francois
name: Boisse, Isabelle
name: Dykes, Erica
name: Kasdin, N. J.
name: Tamura, Motohide
Publisher: name: arXiv
Year: 2024
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present follow-up SCExAO/CHARIS $H$ and $K$-band (R $\sim$ 70) high-contrast integral field spectroscopy and Keck/NIRC2 photometry of directly-imaged brown dwarf companion HD 33632 Ab and new radial-velocity data for the system from the SOPHIE spectrograph, complemented by Hipparcos and Gaia astrometry. These data enable more robust spectral characterization compared to lower-resolution spectra from the discovery paper and more than double the available astrometric and radial-velocity baseline. HD 33632 Ab's spectrum is well reproduced by a field L8.5--L9.5 dwarf. Using the Exo-REM atmosphere models, we derive a best-fit temperature, surface gravity and radius of $T_{\rm eff}$ = 1250 $K$, log(g) = 5, and $R$ = 0.97 $R_{\rm J}$ and a solar C/O ratio. Adding the SOPHIE radial-velocity data enables far tighter constraints on the companion's orbital properties (e.g. $i$=${47.5}_{-4.7}^{+2.5}$$^{o}$) and dynamical mass (${52.8}_{-2.4}^{+2.6}$$M_{\rm J}$) than derived from imaging data and \textit{Gaia} eDR3 astrometry data alone. HD 33632 Ab should be a prime target for multi-band imaging and spectroscopy with the \textit{James Webb Space Telescope} and the \textit{Roman Space Telescope}'s Coronagraphic Instrument, shedding detailed light on HD 33632 Ab's clouds and chemistry and providing a key reference point for understanding young exoplanet atmospheres.
description: 21 pages, 11 figures, 7 tables; published in AAS Journals
Target Space Duality of Non-Supersymmetric String Theory
Creators: name: Itoyama, H.
name: Koga, Yuichi
name: Nakajima, Sota
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: T-dualities of the non-supersymmetric string models, which are constructed by twisted compactifications, are investigated. We show that the T-duality groups of such models are obtained by imposing congruence conditions on $O\left( d_{L},d_{R},\mathbb{Z}\right) $, that is, the non-supersymmetric string models are invariant under congruence subgroups of $O\left( d_{L},d_{R},\mathbb{Z}\right)$. We also point out that the transitions among the non-supersymmetric models can be induced by acting $O\left( d_{L},d_{R},\mathbb{Z}\right) $ transformations.
description: References added
Canonical matrices of bilinear and sesquilinear forms
Creators: name: Horn, Roger A.
name: Sergeichuk, Vladimir V.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Representation Theory (math.RT)
subject: FOS: Mathematics
subject: 15A21; 15A63

description: Canonical matrices are given for (a) bilinear forms over an algebraically closed or real closed field; (b) sesquilinear forms over an algebraically closed field and over real quaternions with any nonidentity involution; and (c) sesquilinear forms over a field F of characteristic different from 2 with involution (possibly, the identity) up to classification of Hermitian forms over finite extensions of F. A method for reducing the problem of classifying systems of forms and linear mappings to the problem of classifying systems of linear mappings is used to construct the canonical matrices. This method has its origins in representation theory and was devised in [V.V. Sergeichuk, Math. USSR-Izv. 31 (1988) 481-501].
description: 44 pages; misprints corrected; accepted for publication in Linear Algebra and its Applications (2007)
Social reinforcer preferences of elementary school and college students
Creators: name: Ganshorn, Margaret Ruth
Publisher: name: University of British Columbia
Year: 2010

description: In order to assess the differences with respect to the social reinforcer preferences of adults and children, and the consistency of the preferences of the two groups over time and across situations, the rank order of preference of eight social reinforcers was measured by administering a paired-comparisons questionnaire on two occasions, one week apart, and a behavioural task involving the same eight reinforcers in the third week. The results indicated that expressed preference was highly stable over time, and consistent across assessment procedures (questionnaires and wool-sorting task), and that the two groups differed significantly in terms of order of preference. The findings of the present study are related to previous research; the educational and therapeutic implications of the results are discussed, and suggestions regarding future research are made.
Dynamics of the Mixmaster Universe in a non-commutative Generalized Uncertainty Principle framework
Creators: name: Segreto, Sebastiano
name: Montani, Giovanni
Publisher: name: arXiv
Year: 2024
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this work, we examine the dynamical aspects of the cosmological Mixmaster model within the framework of non-commutative generalized uncertainty principle (GUP) theories. The theory is formulated classically by introducing a well-defined symplectic form that differs from the ordinary one, thereby inducing a general deformation of the Poisson brackets describing a precise class of GUP theories. In this general setting, we first investigate the behavior of the Bianchi I and Bianchi II models using Misner variables. Then, we study the Bianchi IX model in the Mixmaster approximation, which is well-known for accurately reproducing the dynamics of the point-particle Universe approaching the cosmological singularity. We derive the corresponding Belinsky-Khalatnikov-Lifshitz (BKL) map and then, by selecting a specific GUP model associated with string theory, we explicitly investigate its resulting features shaped by the non-commutative GUP scheme. Our findings reveal that the chaotic and ergodic behavior typically observed in the standard BKL map, which characterizes the point-Universe's approach to the singularity, is replaced by quasi-periodic orbits in the parameter space of the theory. This corresponds to an oscillatory behavior of the Universe's scale factors, dependent on the initial conditions.
description: New submission matching the published version
Need of AI in Modern Education: in the Eyes of Explainable AI (xAI)
Creators: name: Manna, Supriya
name: Sett, Niladri
Publisher: name: arXiv
Year: 2024
Subjects: subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: Modern Education is not \textit{Modern} without AI. However, AI's complex nature makes understanding and fixing problems challenging. Research worldwide shows that a parent's income greatly influences a child's education. This led us to explore how AI, especially complex models, makes important decisions using Explainable AI tools. Our research uncovered many complexities linked to parental income and offered reasonable explanations for these decisions. However, we also found biases in AI that go against what we want from AI in education: clear transparency and equal access for everyone. These biases can impact families and children's schooling, highlighting the need for better AI solutions that offer fair opportunities to all. This chapter tries to shed light on the complex ways AI operates, especially concerning biases. These are the foundational steps towards better educational policies, which include using AI in ways that are more reliable, accountable, and beneficial for everyone involved.
description: Chapter in the book: Blockchain and AI in Shaping the Modern Education System, CRC Press, Taylor & Francis Group, USA
Investigation of the content of brief samples of writing of high school students
Creators: name: Balasa, Joseph
Publisher: name: University of British Columbia
Year: 2010

description: Brief written samples of high school students (83 grade 11 and 12) were content analyzed for the preferential use of verbs, nouns or adjectives. Consistency of preference across time (7 - 10 days) and testing mode word lists versus short prose passage was assessed. For 14 subjects (5 noun, 5 verb, 4 adjective dominant), the Gottschalk Human Relations Scale scoring was used to determine the magnitude of emotions associated with the dominant use of verbs, nouns and adjectives. The results indicated that the majority of the students preferred the noun dominant response mode. Verb dominant students comprised a smaller group, while very few students preferred the adjective dominant response mode. Expressed preference for the dominant response mode was found to be highly stable over time and consistent across the testing mode. Students did not significantly alter their dominant response mode even when they were requested to alter their original views and "take a totally different stand." The Gottschalk Human Relations Scale scores indicated that for the 14 subjects participating in the analysis, the noun dominant group displayed the greatest variance in the magnitude of emotions. The highest absolute magnitudes of emotion were associated with the adjective dominant response mode. Verb dominant students displayed high and stable emotional magnitudes. The results of the present study are examined in view of possible educational and therapeutic implications, and suggestions regarding future research are made.
Phantom expansion with non-linear Schrödinger-type formulation of scalar field cosmology
Creators: name: Phetnora, Theerakarn
name: Sooksan, Roongtum
name: Gumjudpai, Burin
Publisher: name: arXiv
Year: 2008
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics (astro-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We describe non-flat standard Friedmann cosmology of canonical scalar field with barotropic fluid in form of non-linear Schrödinger-type (NLS) formulation in which all cosmological dynamical quantities are expressed in term of Schrödinger quantities as similar to those in time-independent quantum mechanics. We assume the expansion to be superfast, i.e. phantom expansion. We report all Schrödinger-analogous quantities to scalar field cosmology. Effective equation of state coefficient is analyzed and illustrated. We show that in a non-flat universe, there is no fixed $w_{\rm eff}$ value for the phantom divide. In a non-flat universe, even $w_{\rm eff} > -1$, the expansion can be phantom. Moreover, in open universe, phantom expansion can happen even with $w_{\rm eff} > 0$. We also report scalar field exact solutions within frameworks of the Friedmann formulation and the NLS formulation in non-flat universe cases.
description: [11 pages, 8 figures] Some parts of this work was presented as an oral presentation by Theerakarn Phetnora at the SIAM Physics Congress 2008, Kao Yai, Thailand (20-22 March 2008), accepted by Gen. Rel. Grav
Generating Static Fluid Spheres by Conformal Transformations
Creators: name: Loranger, Jonathan
name: Lake, Kayll
Publisher: name: arXiv
Year: 2008
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We generate an explicit four-fold infinity of physically acceptable exact perfect fluid solutions of Einstein's equations by way of conformal transformations of physically unacceptable solutions (one way to view the use of isotropic coordinates). Special cases include the Schwarzschild interior solution and the Einstein static universe. The process we consider involves solving two equations of the Riccati type coupled by a single generating function rather than a specification of one of the two metric functions.
description: 4 pages revtex4, two figures, Final form to appear in Phys. Rev. D