cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Random geometric graph description of connectedness percolation in rod systems
Creators: name: Chatterjee, Avik P.
name: Grimaldi, Claudio
Publisher: name: arXiv
Year: 2015
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: The problem of continuum percolation in dispersions of rods is reformulated in terms of weighted random geometric graphs. Nodes (or sites or vertices) in the graph represent spatial locations occupied by the centers of the rods. The probability that an edge (or link) connects any randomly selected pair of nodes depends upon the rod volume fraction as well as the distribution over their sizes and shapes, and also upon quantities that characterize their state of dispersion (such as the orientational distribution function). We employ the observation that contributions from closed loops of connected rods are negligible in the limit of large aspect ratios to obtain percolation thresholds that are fully equivalent to those calculated within the second-virial approximation of the connectedness Ornstein-Zernike equation. Our formulation can account for effects due to interactions between the rods, and many-body features can be partially addressed by suitable choices for the edge probabilities.
description: 7 pages
The condition number of join decompositions
Creators: name: Breiding, Paul
name: Vannieuwenhoven, Nick
Publisher: name: arXiv
Year: 2016
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics

description: The join set of a finite collection of smooth embedded submanifolds of a mutual vector space is defined as their Minkowski sum. Join decompositions generalize some ubiquitous decompositions in multilinear algebra, namely tensor rank, Waring, partially symmetric rank and block term decompositions. This paper examines the numerical sensitivity of join decompositions to perturbations; specifically, we consider the condition number for general join decompositions. It is characterized as a distance to a set of ill-posed points in a supplementary product of Grassmannians. We prove that this condition number can be computed efficiently as the smallest singular value of an auxiliary matrix. For some special join sets, we characterized the behavior of sequences in the join set converging to the latter's boundary points. Finally, we specialize our discussion to the tensor rank and Waring decompositions and provide several numerical experiments confirming the key results.
OPPORTUNITIES TO TRAIN ADMINISTRATIVE STAFF IN THE HIGHER EDUCATION SYSTEM
Creators: name: Sadullayev, son of Dilmurod Bakhtiyor,  researcher of the "Innovative Education" department of Tashkent State University of Economics
Publisher: name: Zenodo
Year: 2024

description: In this article, the possibilities of training management personnel in the higher education system the essence is illuminated. An analysis of the synergy (connection) between the training of management personnel and socio-pedagogical equipment is given when management is trained, their decision-making process enhances the integration of socio-pedagogical equipment into the academic curriculum .

Key words : innovation, management, control and analysis, experience, projects, decisions, news, efficiency, activity, human economic, technological, assessment.
Cascades of Coverage: Dynamics of Media Attention to Social Movement Organizations
Creators: name: Seguin, Charles
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2016

description: Gaining attention in the mass media is a key goal of many social movement organizations (SMOs). The dominant explanation of media attention to SMOs is that the media act like a filter, selecting some types of SMOs and events for attention, and ignoring others based on characteristics of these SMOs, events, and their political environment. In contrast to this “bias model,” I argue that some media attention to SMOs is characterized by positive feedback, or rich-get-richer processes: past media attention increases the likelihood of future media attention through its effect on the SMO and on other media outlets. Like other positive feedback systems, media attention can be path dependent, is routinely punctuated by large cascades of attention to previously obscure SMOs, and can be contingent on “accidents” of history: at critical junctures, individuals, organizations, and events have the potential to radically impact the extent of media attention to their movements and organizations. Media attention to SMOs can also become decoupled from the types of events that initially sparked their media attention, becoming spokes-organizations for their movements and receiving media attention for events and stories that they themselves are not involved. In support of this theory, I first show that media attention is, similar to other positive feedback processes, power-law distributed across SMOs using two national (US) data sets. I then illustrate the process of positive feedback in media attention through a case study of the Black Panther Party's rise to prominence in media attention.
विधार्थ्यांच्या स्व संकल्पनेचा अभ्यास
Creators: name: प्रा.डॉ प्रकाश जगताप
Publisher: name: Zenodo
Year: 2022

description: सारांश – स्व संकल्पना हा व्यक्तिमत्वाचा एक महत्वाचा भाग आहे.ज्या मुळे व्यक्तीला त्याच्या स्व ची ओळख आणि जाणीव होते.व्यक्तीच्या यशस्वी जीवनासाठी स्वसंकल्पना ओळख असणे महत्वाचे आहे. प्रस्तुत संशोधन लेखात विधार्थ्यांच्या स्व संकल्पनेचा अभ्यास केला आहे. यात विधार्थ्यांच्या स्वसंकल्पनेची सद्य स्थिती , पुरुष व स्त्री विधार्थी ,मराठी व इंग्रजी मध्यम विधार्थी यांच्या स्व संकल्पनेचे सर्वेक्षण संशोधन पद्धतीचा वापर करून शोध घेऊन निष्कर्ष काढले आहे.
The nil Temperley--Lieb algebra of type affine C
Creators: name: Green, R. M.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Representation Theory (math.RT)
subject: Combinatorics (math.CO)
subject: Quantum Algebra (math.QA)
subject: FOS: Mathematics
subject: 16G30

description: We introduce a type affine $C$ analogue of the nil Temperley--Lieb algebra, in terms of generators and relations. We show that this algebra $T(n)$, which is a quotient of the positive part of a Kac--Moody algebra of type $D_{n+1}^{(2)}$, has an easily described faithful representation as an algebra of creation and annihilation operators on particle configurations, reminiscent of the open TASEP model in statistical physics. The centre of $T(n)$ consists of polynomials in a certain element $Q$, and $T(n)$ is a free module of finite rank over its centre. We show how to localize $T(n)$ by adjoining an inverse of $Q$, and prove that the resulting algebra is a full matrix ring over a ring of Laurent polynomials over a field. Although $T(n)$ has wild representation type, over an algebraically closed field we can classify all the finite dimensional indecomposable representations of $T(n)$ in which $Q$ acts invertibly.
description: 49 pages, a few figures. Corrected to agree with published version
Using Learnable Physics for Real-Time Exercise Form Recommendations
Creators: name: Jaiswal, Abhishek
name: Chauhan, Gautam
name: Srivastava, Nisheeth
Publisher: name: arXiv
Year: 2023
Subjects: subject: Artificial Intelligence (cs.AI)
subject: Human-Computer Interaction (cs.HC)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Good posture and form are essential for safe and productive exercising. Even in gym settings, trainers may not be readily available for feedback. Rehabilitation therapies and fitness workouts can thus benefit from recommender systems that provide real-time evaluation. In this paper, we present an algorithmic pipeline that can diagnose problems in exercise techniques and offer corrective recommendations, with high sensitivity and specificity in real-time. We use MediaPipe for pose recognition, count repetitions using peak-prominence detection, and use a learnable physics simulator to track motion evolution for each exercise. A test video is diagnosed based on deviations from the prototypical learned motion using statistical learning. The system is evaluated on six full and upper body exercises. These real-time recommendations, counseled via low-cost equipment like smartphones, will allow exercisers to rectify potential mistakes making self-practice feasible while reducing the risk of workout injuries.
description: Accepted by ACM RecSys '23, 12 pages , 7 Figures
Effective theory for neutral resonances and a statistical dissection of the ATLAS diboson excess
Creators: name: Fichet, Sylvain
name: von Gersdorff, Gero
Publisher: name: arXiv
Year: 2015
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We classify the complete set of dimension-5 operators relevant for the resonant production of a singlet of spin 0 or 2 linearly coupled to the Standard Model (SM). We compute the decay width of such states as a function of the effective couplings, and provide the matching to various well-motivated New Physics scenarios. We then investigate the possibility that one of these neutral resonances be at the origin of the excess in diboson production recently reported by the ATLAS collaboration. We perform a shape analysis of the excess under full consideration of the systematic uncertainties to extract the width $Γ_{\rm tot}$ of the hypothetical resonance, finding it to be in the range 26 GeV $
description: 31 pages
The complexity of recognizing minimally tough graphs
Creators: name: Katona, Gyula Y
name: Kovács, István
name: Varga, Kitti
Publisher: name: arXiv
Year: 2017
Subjects: subject: Discrete Mathematics (cs.DM)
subject: Combinatorics (math.CO)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics
subject: G.2.2; F.1.3
subject: G.2.2, F.1.3

description: A graph is called $t$-tough if the removal of any vertex set $S$ that disconnects the graph leaves at most $|S|/t$ components. The toughness of a graph is the largest $t$ for which the graph is $t$-tough. A graph is minimally $t$-tough if the toughness of the graph is $t$ and the deletion of any edge from the graph decreases the toughness. The complexity class DP is the set of all languages that can be expressed as the intersection of a language in NP and a language in coNP. In this paper, we prove that recognizing minimally $t$-tough graphs is DP-complete for any positive rational number $t$. We introduce a new notion called weighted toughness, which has a key role in our proof.
Uni-paint: A Unified Framework for Multimodal Image Inpainting with Pretrained Diffusion Model
Creators: name: Yang, Shiyuan
name: Chen, Xiaodong
name: Liao, Jing
Publisher: name: arXiv
Year: 2023
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Recently, text-to-image denoising diffusion probabilistic models (DDPMs) have demonstrated impressive image generation capabilities and have also been successfully applied to image inpainting. However, in practice, users often require more control over the inpainting process beyond textual guidance, especially when they want to composite objects with customized appearance, color, shape, and layout. Unfortunately, existing diffusion-based inpainting methods are limited to single-modal guidance and require task-specific training, hindering their cross-modal scalability. To address these limitations, we propose Uni-paint, a unified framework for multimodal inpainting that offers various modes of guidance, including unconditional, text-driven, stroke-driven, exemplar-driven inpainting, as well as a combination of these modes. Furthermore, our Uni-paint is based on pretrained Stable Diffusion and does not require task-specific training on specific datasets, enabling few-shot generalizability to customized images. We have conducted extensive qualitative and quantitative evaluations that show our approach achieves comparable results to existing single-modal methods while offering multimodal inpainting capabilities not available in other methods. Code will be available at https://github.com/ysy31415/unipaint.
description: Accepted by ACMMM'23
Classicality of a quantum oscillator
Creators: name: Ahmadzadegan, Aida
name: Mann, Robert B.
name: Terno, Daniel R.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Gaussian quantum systems exhibit many explicitly quantum effects but can be simulated classically. Using both the Hilbert space (Koopman) and the phase-space (Moyal) formalisms we investigate how robust this classicality is. We find failures of consistency of the dynamics of a hybrid classical-quantum systems from both perspectives. By demanding that no unobservable operators couple to the quantum sector in the Koopmanian formalism, we show that the classical equations of motion act on their quantum counterparts without experiencing any back-reaction, resulting in non-conservation of energy in the quantum system. Using the phase-space formalism we study the short time evolution of the moment equations of a hybrid classical-Gaussian quantum system and observe violations of the Heisenberg Uncertainty Relation in the quantum sector for a broad range of initial conditions. We estimate the time scale for these violations, which is generically rather short. This inconsistency indicates that while many explicitly quantum effects can be represented classically, quantum aspects of the system cannot be fully masked. We comment on the implications of our results for quantum gravity.
Joint engagement modulates object discrimination in toddlers: a pilot electrophysiological investigation
Creators: name: Soares, Annabelle
name: Abood, Kimberly
name: Baker, Elizabeth
name: Elder, Lauren
name: Jeste, Shafali Spurling
name: Hutman, Ted
name: Harrop, Clare
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2016

description: Joint engagement (JE) is a state in which two people attend to a common target. By supporting an infant’s attention to the target, JE promotes encoding of information. This process has not been studied in toddlers despite the fact that language and social interaction develop rapidly in this period. We asked whether JE modulates object discrimination in typically developing toddlers. In a pilot evaluation of a novel, naturalistic paradigm, toddlers (n = 11) were introduced to toys by an examiner with or without JE. Toddlers then viewed images of the toys while high-density electroencephalography (EEG) was recorded. Analysis focused on the differential neural response to objects presented in the two conditions. EEG components of interest included frontal positive component (Pb), negative component (Nc), and positive slow wave. Toddlers discriminated between conditions with a larger Pb peak amplitude to stimuli presented with JE and a larger Nc mean amplitude to the stimuli presented without JE, reflecting greater familiarity with the toys presented socially. Our findings suggest that JE supports object learning in toddlers, and supports the potential utility of this novel paradigm in both the assessment and the potential to detect impairment in social learning among toddlers.
title: Multiscale and numerical simulation of cancer hyperthermia based on magnetic nanoparticles delivery
Creators: name: Al Sariri, Tahani Mohammed Sulaiman
Publisher: name: University of Glasgow
Year: 2023

description: Cancer is one of the primary causes of death worldwide. The hyperthermia cancer treatment which is used nowadays is very harmful, because it destroys both tumorous and healthy cells at the same time. Magnetic nanoparticles with different sizes and materials are used to improve cancer hyperthermia and minimize its side effects by localizing the heat within the tumour only. These particles destroy both the cancer and tumour cells by transforming the energy of the magnetic field to heat. The purpose of this thesis is to study the heat distribution in the tumour, which in turn helps to find the optimal hyperthermia treatment. Also, we aim to study the interaction between the tumour and surrounding tissues. In this thesis we derive new systems of homogenised partial differential equations (PDEs) describing blood transport, delivery of nanoparticles, and heat transport to investigate cancer hyperthermia driven by the application of the magnetic field applied to nanoparticles. We assume that the particles are injected into the tumour vessels and then they extravasate to the tumour interstitial space if they are sufficiently small to be transported through the pores of the vascular walls. Otherwise, the adhesion between the particles and vessels’ wall is to be considered as a primary transport mechanism, and the particles cannot be transported from the vessels to the tumour interstitium. We study the influence of vessels’ geometry as the tumour vessels are not regular and their tortuosity varies within the tumour. In addition, we investigate the effect of various injection conditions on the temperature maps. The temperature should be above 42◦C to destroy cancer cells but for at most two hours to avoid heating the surrounding healthy tissue. We determine the best magnetic intensity, injection time, wall shear rate, and concentration of nanoparticles to achieve the above-mentioned condition. To investigate the relation between the tumour and the surrounding healthy tissue and the impact of the magnetic field on the fluid flow, we derive a new system of homogenised differential equations which expresses the fluid flow of the tumour that interacts with surrounding healthy tissue and influenced by a non homogeneous magnetic force. The latter is obtained starting from the previously derived differential equations which in this context represents the mesoscale differential equations. We exemplify the results for the case of a homogenous magnetic force that is applied in the direction of the mesoscale cylindrical tumour region.
Convergence analysis of Riemannian Gauss-Newton methods and its connection with the geometric condition number
Creators: name: Breiding, Paul
name: Vannieuwenhoven, Nick
Publisher: name: arXiv
Year: 2017
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics

description: We obtain estimates of the multiplicative constants appearing in local convergence results of the Riemannian Gauss-Newton method for least squares problems on manifolds and relate them to the geometric condition number of [P. Bürgisser and F. Cucker, Condition: The Geometry of Numerical Algorithms, 2013].
On the method of directly defining inverse mapping for nonlinear differential equations
Creators: name: Liao, Shijun
name: Zhao, Yinlong
Publisher: name: arXiv
Year: 2015
Subjects: subject: Numerical Analysis (math.NA)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: In scientific computing, it is time-consuming to calculate an inverse operator ${\mathscr A}^{-1}$ of a differential equation ${\mathscr A}φ= f$, especially when ${\mathscr A}$ is a highly nonlinear operator. In this paper, based on the homotopy analysis method (HAM), a new approach, namely the method of directly defining inverse mapping (MDDiM), is proposed to gain analytic approximations of nonlinear differential equations. In other words, one can solve a nonlinear differential equation ${\mathscr A}φ= f$ by means of directly defining an inverse mapping $\mathscr J$, i.e. without calculating any inverse operators. Here, the inverse mapping $\mathscr J$ is even unnecessary to be explicitly expressed in a differential form, since "mapping" is a more general concept than "differential operator". To guide how to directly define an inverse mapping $\mathscr J$, some rules are provided. Besides, a convergence theorem is proved, which guarantees that a convergent series solution given by the MDDiM must be a solution of problems under consideration. In addition, three nonlinear differential equations are used to illustrate the validity and potential of the MDDiM, and especially the great freedom and large flexibility of directly defining inverse mappings for various types of nonlinear problems. The method of directly defining inverse mapping (MDDiM) might open a completely new, more general way to solve nonlinear problems in science and engineering, which is fundamentally different from traditional methods.
description: 38 pages, 7 figures, accepted by Numerical Algorithm
Integer Echo State Networks: Efficient Reservoir Computing for Digital Hardware
Creators: name: Kleyko, Denis
name: Frady, E. Paxon
name: Kheffache, Mansour
name: Osipov, Evgeny
Publisher: name: arXiv
Year: 2017
Subjects: subject: Neural and Evolutionary Computing (cs.NE)
subject: FOS: Computer and information sciences

description: We propose an approximation of Echo State Networks (ESN) that can be efficiently implemented on digital hardware based on the mathematics of hyperdimensional computing. The reservoir of the proposed integer Echo State Network (intESN) is a vector containing only n-bits integers (where n<8 is normally sufficient for a satisfactory performance). The recurrent matrix multiplication is replaced with an efficient cyclic shift operation. The proposed intESN approach is verified with typical tasks in reservoir computing: memorizing of a sequence of inputs; classifying time-series; learning dynamic processes. Such architecture results in dramatic improvements in memory footprint and computational efficiency, with minimal performance loss. The experiments on a field-programmable gate array confirm that the proposed intESN approach is much more energy efficient than the conventional ESN.
description: 13 pages, 11 figures, 5 tables
Individual differences in regulatory focus predict neural response to reward
Creators: name: Scult, Matthew A.
name: Knodt, Annchen R.
name: Hariri, Ahmad R.
name: Ryoo, Minyoung
name: Hanson, Jamie L.
name: Adcock, R. Alison
name: Strauman, Timothy J.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2017

description: Although goal pursuit is related to both functioning of the brain's reward circuits and psychological factors, the literatures surrounding these concepts have often been separate. Here, we use the psychological construct of regulatory focus to investigate individual differences in neural response to reward. Regulatory focus theory proposes two motivational orientations for personal goal pursuit: (1) promotion, associated with sensitivity to potential gain, and (2) prevention, associated with sensitivity to potential loss. The monetary incentive delay task was used to manipulate reward circuit function, along with instructional framing corresponding to promotion and prevention in a within-subject design. We observed that the more promotion oriented an individual was, the lower their ventral striatum response to gain cues. Follow-up analyses revealed that greater promotion orientation was associated with decreased ventral striatum response even to no-value cues, suggesting that promotion orientation may be associated with relatively hypoactive reward system function. The findings are also likely to represent an interaction between the cognitive and motivational characteristics of the promotion system with the task demands. Prevention orientation did not correlate with ventral striatum response to gain cues, supporting the discriminant validity of regulatory focus theory. The results highlight a dynamic association between individual differences in self-regulation and reward system function.
Black Sun: Ocular Invisibility of Relativistic Luminous Astrophysical Bodies
Creators: name: Lee, Jeffrey S.
name: Cleaver, Gerald B.
Publisher: name: arXiv
Year: 2015
Subjects: subject: General Physics (physics.gen-ph)
subject: FOS: Physical sciences

description: The relativistic Doppler shifting of visible electromagnetic radiation to beyond the human ocular range reduces the incident radiance of the source. Consequently, luminous astrophysical bodies (LABs) can be rendered invisible with sufficient relativistic motion. This paper determines the proper distance as a function of relativistic velocity at which a luminous object attains ocular invisibility.
description: 10 pages, 1 table, 2 figures
Vanderbilt University Poll: Tennessee Poll Fall 2017
Creators: name: Vanderbilt University
Publisher: name: Roper Center for Public Opinion Research
Year: 2019

description: President Donald Trump job performance (1); Congress job performance (1); Tennessee State Legislature job performance (1); Governor Bill Haslam job performance (1); Senator Lamar Alexander job performance (1); Senator Bob Corker job performance (1); opinion of public figures (11); Tennessee state government priorities (2); Democratic Party (2); Republican Party (2); economic situation of the country (1); economic situation of Tennessee (1); Trump changing Washington (1); views of bipartisanship (1); feelings about national government performance (1); blame for government failings (1); feelings about state government performance (1); blame for state government failings (1); health care system (1); blame for 2010 health care law (1); marijuana (1); same-sex marriage (1); undocumented immigrants (2); illegal immigrants (1); taxing (2); trust in media (2); climate change (3); euthanasia (1); opioid addiction (1); Russian interference in presidential election (1); political engagement (3); rural hospital closings (3); charter schools (1); Trump telling the truth (1).
पुणे शहराच्या शिवाजीनगर भागातील बांधकाम महिला मजुरांच्या सामाजिक समस्या
Creators: name: डॉ. राजेश्री गोखले 1  सुधीर रा. भालेराव2
Publisher: name: Zenodo
Year: 2022

description: प्रस्तावना : पुणे शहर हे मुख्यत्वे कर्मचारी व कामगारांचे शहर म्हणून पुर्वीपासून प्रसिद्ध आहे. पुणे शहरात सरकारी, निमसरकारी व खाजगी संस्थांचे प्रमाण खूप असल्यामुळे आजूबाजूच्या जिल्ह्यातून फार मोठ्या प्रमाणात कामगारांचे स्थलांतरण होत असते. या पुणे शहरात मजुरांची संख्या देखील लक्षणीय प्रमाणात आहे. कारण 1972 च्या दुष्काळापासून विशेषत: मराठवाड्यातील जिल्ह्यांतून फार मोठया प्रमाणात मजुरांचे स्थलांतर पुण्यात झाले आहे. हे मजुर विविध क्षेत्रातील उद्योगात, संस्थांमध्ये काम करीत असतात. विशेषत: या शहरात होणाऱ्या नवनव्या बांधकामाच्या ठिकाणी हे मजुर काम करीत असतात आणि विशेष म्हणजे या मजुरांमध्ये स्त्रीयांचे प्रमाणसुध्दा लक्षणीय प्रमाणात असल्याचे आढळते. हे सर्व मजुर हे स्त्री व पुरुष दोन्हीही रोजंदारीवर व अनियमित स्वरुपात काम करीत असतात व हे मजुर मिळविण्यासाठी पुण्याच्या भागात उदा. वडारवाडी, कामगार पुतळा, गाडीतळ, पांडवनगर, पाटील इस्टेट, कुसाळकर पुतळा चौक, गोलंदाज चौक, इ. मजुर अड्डे उपलब्ध आहे. येथे विशेष म्हणजेया मजुरांची कोठेही नोंदणी व माहिती उपलब्ध नसल्याने हे सर्व असंघटीत स्वरुपाचे असतात.
A Riemannian Trust Region Method for the Canonical Tensor Rank Approximation Problem
Creators: name: Breiding, Paul
name: Vannieuwenhoven, Nick
Publisher: name: arXiv
Year: 2017
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics

description: The canonical tensor rank approximation problem (TAP) consists of approximating a real-valued tensor by one of low canonical rank, which is a challenging non-linear, non-convex, constrained optimization problem, where the constraint set forms a non-smooth semi-algebraic set. We introduce a Riemannian Gauss-Newton method with trust region for solving small-scale, dense TAPs. The novelty of our approach is threefold. First, we parametrize the constraint set as the Cartesian product of Segre manifolds, hereby formulating the TAP as a Riemannian optimization problem, and we argue why this parametrization is among the theoretically best possible. Second, an original ST-HOSVD-based retraction operator is proposed. Third, we introduce a hot restart mechanism that efficiently detects when the optimization process is tending to an ill-conditioned tensor rank decomposition and which often yields a quick escape path from such spurious decompositions. Numerical experiments show improvements of up to three orders of magnitude in terms of the expected time to compute a successful solution over existing state-of-the-art methods.
Modified Gravity N-body Code Comparison Project
Creators: name: Winther, Hans A.
name: Schmidt, Fabian
name: Barreira, Alexandre
name: Arnold, Christian
name: Bose, Sownak
name: Llinares, Claudio
name: Baldi, Marco
name: Falck, Bridget
name: Hellwing, Wojciech A.
name: Koyama, Kazuya
name: Li, Baojiu
name: Mota, David F.
name: Puchwein, Ewald
name: Smith, Robert E.
name: Zhao, Gong-Bo
Publisher: name: arXiv
Year: 2015
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Self-consistent ${\it N}$-body simulations of modified gravity models are a key ingredient to obtain rigorous constraints on deviations from General Relativity using large-scale structure observations. This paper provides the first detailed comparison of the results of different ${\it N}$-body codes for the $f(R)$, DGP, and Symmetron models, starting from the same initial conditions. We find that the fractional deviation of the matter power spectrum from $Λ$CDM agrees to better than $1\%$ up to $k \sim 5-10~h/{\rm Mpc}$ between the different codes. These codes are thus able to meet the stringent accuracy requirements of upcoming observational surveys. All codes are also in good agreement in their results for the velocity divergence power spectrum, halo abundances and halo profiles. We also test the quasi-static limit, which is employed in most modified gravity ${\it N}$-body codes, for the Symmetron model for which the most significant non-static effects among the models considered are expected. We conclude that this limit is a very good approximation for all of the observables considered here.
description: 31 pages, 16 figures. Version to appear in MNRAS
Gershwinia thailandensis Wutthituntisil, Xiao and Aungtonya, a new genus and species of box jellyfish (Carybdeida: Carukiidae) from Thai waters
Creators: name: Nattanon Wutthituntisil
Publisher: name: Phuket Marine Biological Center
Year: 2023
Subjects: morphological study, molecular analysis, Andaman Sea, Gulf of Thailand

description: Phuket Marine Biological Center Research Bulletin, 80, 1, ม.ค.-19
Identifiability beyond Kruskal's bound for symmetric tensors of degree 4
Creators: name: Angelini, Elena
name: Chiantini, Luca
name: Vannieuwenhoven, Nick
Publisher: name: arXiv
Year: 2017
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics

description: We show how methods of algebraic geometry can produce criteria for the identifiability of specific tensors that reach beyond the range of applicability of the celebrated Kruskal criterion. More specifically, we deal with the symmetric identifiability of symmetric tensors in Sym$^4(\mathbb{C}^{n+1})$, i.e., quartic hypersurfaces in a projective space $\mathbb{P}^n$, that have a decomposition in 2n+1 summands of rank 1. This is the first case where the reshaped Kruskal criterion no longer applies. We present an effective algorithm, based on efficient linear algebra computations, that checks if the given decomposition is minimal and unique. The criterion is based on the application of advanced geometric tools, like Castelnuovo's lemma for the existence of rational normal curves passing through a finite set of points, and the Cayley-Bacharach condition on the postulation of finite sets. In order to apply these tools to our situation, we prove a reformulation of these results, hereby extending classical results such as Castelnuovo's lemma and the analysis of Geramita, Kreuzer, and Robbiano, "Cayley-Bacharach schemes and their canonical modules", Trans. Amer. Math. Soc. 339:443-452, 1993.
description: 16 pages
On the average condition number of tensor rank decompositions
Creators: name: Breiding, Paul
name: Vannieuwenhoven, Nick
Publisher: name: arXiv
Year: 2018
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics

description: We compute the expected value of powers of the geometric condition number of random tensor rank decompositions. It is shown in particular that the expected value of the condition number of $n_1\times n_2 \times 2$ tensors with a random rank-$r$ decomposition, given by factor matrices with independent and identically distributed standard normal entries, is infinite. This entails that it is expected and probable that such a rank-$r$ decomposition is sensitive to perturbations of the tensor. Moreover, it provides concrete further evidence that tensor decomposition can be a challenging problem, also from the numerical point of view. On the other hand, we provide strong theoretical and empirical evidence that tensors of size $n_1~\times~n_2~\times~n_3$ with all $n_1,n_2,n_3 \ge 3$ have a finite average condition number. This suggests there exists a gap in the expected sensitivity of tensors between those of format $n_1\times n_2 \times 2$ and other order-3 tensors. For establishing these results, we show that a natural weighted distance from a tensor rank decomposition to the locus of ill-posed decompositions with an infinite geometric condition number is bounded from below by the inverse of this condition number. That is, we prove one inequality towards a so-called condition number theorem for the tensor rank decomposition.
Large Non-Volatile Frequency Tuning of Spin Hall Nano-Oscillators using Circular Memristive Nano-Gates
Creators: name: Khademi, Maha
name: Kumar, Akash
name: Rajabali, Mona
name: Dash, Saroj P.
name: Åkerman, Johan
Publisher: name: arXiv
Year: 2023
Subjects: subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: Spin Hall nano oscillators (SHNOs) are promising candidates for neuromorphic computing due to their miniaturized dimensions, non-linearity, fast dynamics, and ability to synchronize in long chains and arrays. However, tuning the individual SHNOs in large chains/arrays, which is key to implementing synaptic control, has remained a challenge. Here, we demonstrate circular memristive nano-gates, both precisely aligned and shifted with respect to nano-constriction SHNOs of W/CoFeB/HfOx, with increased quality of the device tunability. Gating at the exact center of the nano-constriction region is found to cause irreversible degradation to the oxide layer, resulting in a permanent frequency shift of the auto-oscillating modes. As a remedy, gates shifted outside of the immediate nano-constriction region can tune the frequency dramatically (>200 MHz) without causing any permanent change to the constriction region. Circular memristive nano-gates can, therefore, be used in SHNO chains/arrays to manipulate the synchronization states precisely over large networks of oscillators.
description: Marie Sklodowska-Curie Actions, H2020-MSCA-ITN-2020; Project Acronym SPEAR; Grant Agreement No. 955671
Decomposition of a graph into two disjoint odd subgraphs
Creators: name: Kano, Mikio
name: Katona, Gyula Y.
name: Varga, Kitti
Publisher: name: arXiv
Year: 2018
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 05C70

description: An odd (resp. even) subgraph in a multigraph is its subgraph in which every vertex has odd (resp. even) degree. We say that a multigraph can be decomposed into two odd subgraphs if its edge set can be partitioned into two sets so that both form odd subgraphs. In this paper we give a necessary and sufficient condition for the decomposability of a multigraph into two odd subgraphs. We also present a polynomial time algorithm for finding such a decomposition or showing its non-existence. We also deal with the case of the decomposability into an even subgraph and an odd subgraph.
title: Behavioural Responses of Defended and Undefended Prey to Their Predator—A Case Study of Rotifera
Creators: name: Parry, Victor
name: Schlägel, Ulrike E.
name: Tiedemann, Ralph
name: Weithoff, Guntram
Publisher: name: Universität Potsdam
Year: 2023
Subjects: subject: 570 Biowissenschaften; Biologie

description: Predation is a strong species interaction causing severe harm or death to prey. Thus, prey species have evolved various defence strategies to minimize predation risk, which may be immediate (e.g., a change in behaviour) or transgenerational (morphological defence structures). We studied the behaviour of two strains of a rotiferan prey (Brachionus calyciflorus) that differ in their ability to develop morphological defences in response to their predator Asplanchna brightwellii. Using video analysis, we tested: (a) if two strains differ in their response to predator presence and predator cues when both are undefended; (b) whether defended individuals respond to live predators or their cues; and (c) if the morphological defence (large spines) per se has an effect on the swimming behaviour. We found a clear increase in swimming speed for both undefended strains in predator presence. However, the defended specimens responded neither to the predator presence nor to their cues, showing that they behave indifferently to their predator when they are defended. We did not detect an effect of the spines on the swimming behaviour. Our study demonstrates a complex plastic behaviour of the prey, not only in the presence of their predator, but also with respect to their defence status.
description: Zweitveröffentlichungen der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe; 1302
Deep sea fishes from the Andaman Sea by R/V Charatong Tongyai during 1996-2000. Part 7: Order Stomiiformes
Creators: name: Obata, Kota
Publisher: name: Phuket Marine Biological Center
Year: 2023
Subjects: Diplophidae, Gonostomatidae, Sternoptychidae, Phosichthyidae, Stomiidae, Thailand, BIOSHELF

description: Phuket Marine Biological Center Research Bulletin, 80, 1, 21-51
A new renormalization procedure of the quasiparticle random phase approximation
Creators: name: Raduta, A. A.
name: Raduta, C. M.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The ground state of a many body Hamiltonian considered in the quasiparticle representation is redefined by accounting for the quasiparticle quadrupole pairing interaction. The residual interaction of the newly defined quasiparticles is treated by the QRPA. Solutions of the resulting equations exhibit specific features. In particular, there is no interaction strength where the first root is vanishing. A comparison with other renormalization methods is presented.
description: 16 pages, 4 figures
Pencil-based algorithms for tensor rank decomposition are not stable
Creators: name: Beltrán, Carlos
name: Breiding, Paul
name: Vannieuwenhoven, Nick
Publisher: name: arXiv
Year: 2018
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics
subject: 49Q12, 53B20, 15A69 (Primary) 14P10, 65F35, 14Q20 (Secondary)

description: We prove the existence of an open set of $n_1\times n_2 \times n_3$ tensors of rank $r$ on which a popular and efficient class of algorithms for computing tensor rank decompositions based on a reduction to a linear matrix pencil, typically followed by a generalized eigendecomposition, is arbitrarily numerically forward unstable. Our analysis shows that this problem is caused by the fact that the condition number of the tensor rank decomposition can be much larger for $n_1 \times n_2 \times 2$ tensors than for the $n_1\times n_2 \times n_3$ input tensor. Moreover, we present a lower bound for the limiting distribution of the condition number of random tensor rank decompositions of third-order tensors. The numerical experiments illustrate that for random tensor rank decompositions one should anticipate a loss of precision of a few digits.
description: 25 pages, 3 figures, 2 Matlab codes
Non-Newtonian hydrodynamics for a dilute granular suspension under uniform shear flow
Creators: name: Chamorro, Moisés G.
name: Reyes, F. Vega
name: Garzó, V.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We study in this work a steady shearing laminar flow with null heat flux (usually called "uniform shear flow") in a gas-solid suspension at low density. The solid particles are modeled as a gas of smooth hard spheres with inelastic collisions while the influence of the surrounding interstitial fluid on the dynamics of grains is modeled by means of a volume drag force, in the context of a rheological model for suspensions. The model is solved by means of three different but complementary routes, two of them being theoretical (Grad's moment method applied to the corresponding Boltzmann equation and an exact solution of a kinetic model adapted to granular suspensions) and the other being computational (Monte Carlo simulations of the Boltzmann equation). Unlike in previous studies on granular sheared suspensions, we include in our Grad's solution nonlinear terms in the stress tensor in the collisional moment associated with the momentum transfer. This theoretical enhancement allows us for the detection and evaluation of the normal stress differences in the plane normal to the laminar flow. In addition, the exact solution of the kinetic model gives the explicit form of the velocity moments of the velocity distribution function. Comparison between our theoretical and numerical results shows in general a good agreement for the non-Newtonian rheological properties, the kurtosis (fourth velocity moment of the distribution function) and the velocity distribution of the kinetic model for quite strong inelasticity and not too large values of the (scaled) friction coefficient characterizing the viscous drag force. This shows the accuracy of our analytical results that allows us to describe in detail the flow dynamics of the granular suspension with zero heat flux throughout the paper.
description: 18 pages, 11 figures (v1); 16 pages and 9 figures (v2, important revisions); to appear in Phys. Rev. E
Revision of nemipterid fishes in the Reference Collection, Phuket Marine Biological Center
Creators: name: Surapong Banchongmane
Publisher: name: Phuket Marine Biological Center
Year: 2023
Subjects: Nemipteridae, Nemipterus, Parascolopsis, Pentapodus, Scolopsis, Andaman Sea

description: Phuket Marine Biological Center Research Bulletin, 80, 1, 53-91
Magnetism and electronic structure of YTiO$_3$ thin films
Creators: name: Cao, Yanwei
name: Shafer, P.
name: Liu, Xiaoran
name: Meyers, D.
name: Kareev, M.
name: Middey, S.
name: Freeland, J. W.
name: Arenholz, E.
name: Chakhalian, J.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: High-quality (001)-oriented (pseudo-cubic notation) ferromagnetic YTiO$_3$ thin films were epitaxially synthesized in a layer-by-layer way by pulsed laser deposition. Structural, magnetic and electronic properties were characterized by reflection-high-energy-electron-diffraction, X-ray diffraction, vibrating sample magnetometry, and element-resolved resonant soft X-ray absorption spectroscopy. To reveal ferromagnetism of the constituent titanium ions, X-ray magnetic circular dichroism spectroscopy was carried out using four detection modes probing complimentary spatial scale, which overcomes a challenge of probing ferromagnetic titanium with pure Ti3+(3d$^1$). Our work provides a pathway to distinguish between the roles of titanium and A-site magnetic rare-earth cations in determining the magnetism in rare-earth titanates thin films and heterostructures.
Contributions to the width difference in the neutral $D$ system from hadronic decays
Creators: name: Gershon, T.
name: Libby, J.
name: Wilkinson, G.
Publisher: name: arXiv
Year: 2015
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Recent studies of several multi-body $D^0$ meson decays have revealed that the final states are dominantly $CP$-even. However, the small value of the width difference between the two physical eigenstates of the $D^0$-$\overline{D}{}^0$ system indicates that the total widths of decays to $CP$-even and $CP$-odd final states should be the same to within about a percent. The known contributions to the width difference from hadronic $D^0$ decays are discussed, and it is shown that an apparent excess of quasi-$CP$-even modes is balanced, within current uncertainty, by interference effects in quasi-flavour-specific decays. Decay modes which may significantly affect the picture with improved measurements are considered.
description: 17 pages including 3 tables. v2: Updated with published version including new comments in summary
Note on mass occurrence of sea urchins on Patong Beach, Phuket, Thailand
Creators: name: Phuripong Meksuwan
Publisher: name: Phuket Marine Biological Center
Year: 2023
Subjects: red sea urchin, fire urchin, false fire urchin, blue-spotted sea urchin, Astropyga radiata, stomach content, histological study

description: Phuket Marine Biological Center Research Bulletin, 80, 1, 93-100
The Satisfiability Threshold for Non-Uniform Random 2-SAT
Creators: name: Friedrich, Tobias
name: Rothenberger, Ralf
Publisher: name: arXiv
Year: 2019
Subjects: subject: Discrete Mathematics (cs.DM)
subject: Computational Complexity (cs.CC)
subject: FOS: Computer and information sciences

description: Propositional satisfiability (SAT) is one of the most fundamental problems in computer science. Its worst-case hardness lies at the core of computational complexity theory, for example in the form of NP-hardness and the (Strong) Exponential Time Hypothesis. In practice however, SAT instances can often be solved efficiently. This contradicting behavior has spawned interest in the average-case analysis of SAT and has triggered the development of sophisticated rigorous and non-rigorous techniques for analyzing random structures. Despite a long line of research and substantial progress, most theoretical work on random SAT assumes a uniform distribution on the variables. In contrast, real-world instances often exhibit large fluctuations in variable occurrence. This can be modeled by a non-uniform distribution of the variables, which can result in distributions closer to industrial SAT instances. We study satisfiability thresholds of non-uniform random $2$-SAT with $n$ variables and $m$ clauses and with an arbitrary probability distribution $(p_i)_{i\in[n]}$ with $p_1 \ge p_2 \ge \ldots \ge p_n > 0$ over the n variables. We show for $p_1^2=Θ(\sum_{i=1}^n p_i^2)$ that the asymptotic satisfiability threshold is at $m=Θ( (1-\sum_{i=1}^n p_i^2)/(p_1\cdot(\sum_{i=2}^n p_i^2)^{1/2}) )$ and that it is coarse. For $p_1^2=o(\sum_{i=1}^n p_i^2)$ we show that there is a sharp satisfiability threshold at $m=(\sum_{i=1}^n p_i^2)^{-1}$. This result generalizes the seminal works by Chvatal and Reed [FOCS 1992] and by Goerdt [JCSS 1996].
description: 51 pages, 6 figures, extended abstract appeared at ICALP 2019
The Frobenius Condition, Right Properness, and Uniform Fibrations
Creators: name: Gambino, Nicola
name: Sattler, Christian
Publisher: name: arXiv
Year: 2015
Subjects: subject: Category Theory (math.CT)
subject: Algebraic Topology (math.AT)
subject: Logic (math.LO)
subject: FOS: Mathematics

description: We develop further the theory of weak factorization systems and algebraic weak factorization systems. In particular, we give a method for constructing (algebraic) weak factorization systems whose right maps can be thought of as (uniform) fibrations and that satisfy the (functorial) Frobenius condition. As applications, we obtain a new proof that the Quillen model structure for Kan complexes is right proper, avoiding entirely the use of topological realization and minimal fibrations, and we solve an open problem in the study of Voevodsky's simplicial model of type theory, proving a constructive version of the preservation of Kan fibrations by pushforward along Kan fibrations. Our results also subsume and extend work by Coquand and others on cubical sets.
description: v5: reverted definition of uniform fibration to that in v3 to mirror Coquand et al., parts of development restructured accordingly; added references to some technical statements in Section 4; slightly simplified Def. 6.1; added comparison to work of Bourke/Garner (Rmk. 8.5); improved exposition and fixed various typos; 40 pages. Accepted for publication in Journal of Pure and Applied Algebra