cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Building disc structure and galaxy properties through angular momentum: The DARK SAGE semi-analytic model
Creators: name: Stevens, Adam R. H.
name: Croton, Darren J.
name: Mutch, Simon J.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present the new semi-analytic model of galaxy evolution, DARK SAGE, a heavily modified version of the publicly available SAGE code. The model is designed for detailed evolution of galactic discs. We evolve discs in a series of annuli with fixed specific angular momentum, which allows us to make predictions for the radial and angular-momentum structure of galaxies. Most physical processes, including all channels of star formation and associated feedback, are performed in these annuli. We present the surface density profiles of our model spiral galaxies, both as a function of radius and specific angular momentum, and find the discs naturally build a pseduobulge-like component. Our main results are focussed on predictions relating to the integrated mass--specific angular momentum relation of stellar discs. The model produces a distinct sequence between these properties in remarkable agreement with recent observational literature. We investigate the impact Toomre disc instabilities have on shaping this sequence and find they are crucial for regulating both the mass and spin of discs. Without instabilities, high-mass discs would be systematically deficient in specific angular momentum by a factor of ~2.5, with increased scatter. Instabilities also appear to drive the direction in which the mass--spin sequence of spiral galaxy discs evolves. With them, we find galaxies of fixed mass have higher specific angular momentum at later epochs.
description: Published in MNRAS, 19 pages, 20 figures (both including appendices)
Static spherical vacuum solutions in the bumblebee gravity model
Creators: name: Xu, Rui
name: Liang, Dicong
name: Shao, Lijing
Publisher: name: arXiv
Year: 2022
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: The bumblebee gravity model is a vector-tensor theory of gravitation where the vector field nonminimally couples to the Ricci tensor. By investigating the vacuum field equations with spherical symmetry, we find two families of black-hole (BH) solutions in this model: one has a vanishing radial component of the vector field and the other has a vanishing radial component of the Ricci tensor. When the coupling between the vector field and the Ricci tensor is set to zero, the first family becomes the Reissner-Nordström solution while the second family degenerates to the Schwarzschild solution with the vector field being zero. General numerical solutions in both families are obtained for nonzero coupling between the vector field and the Ricci tensor. Besides BH solutions, we also reveal the existence of solutions that have a nonvanishing $tt$-component of the metric on the supposed event horizon where the $rr$-component of the metric diverges while the curvature scalars are finite. These solutions are not supported by existing observations but present certain properties that are of academic interests. We conclude the study by putting the BH solutions into tests against the Solar-system observations and the images of supermassive BHs.
description: 19 pages, 10 figures
Impulsando la dimensión de género en investigación, innovación y desarrollo
Creators: name: García-Holgado, Alicia
name: Dominguez, Angeles
Publisher: name: Zenodo
Year: 2023
Subjects: género
educación
perspectiva de género
gender mainstreaming
brecha de género
género en investigación
universidad

description: Seminario híbrido en la Universidad Católica de la Santísima Concepción (Chile) en el Programa de Doctorado en Educación en Consorcio (https://doctoradoeduconsorcio.cl/) con la Universidad Católica del Maule, la Universidad Católica de Temuco, y la Universidad del Bío-Bío.
Orbital correlations in ultrathin films of late transition metals
Creators: name: Ivanov, Sergei
name: Peacock, Joshua
name: Urazhdin, Sergei
Publisher: name: arXiv
Year: 2022
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We develop a two-orbital Hubbard model of electron correlations in ultrathin (111)-oriented fcc films of late transition metals such as Co and Ni. Our model indicates that the Mott-Hund's interaction results in ferromagnetic nearest-neighbor orbital correlations. Frustration associated with the mismatch between orbital and crystal symmetries prevents orbital ordering, resulting in the orbital liquid state. This state can be manifested in phenomena involving spin-orbit coupling, such as magnetic anisotropy.
description: Manuscript published in Phys. Rev. Materials
Deep Learning-Based Connector Detection for Robotized Assembly of Automotive Wire Harnesses
Creators: name: Wang, Hao
name: Johansson, Björn
Publisher: name: arXiv
Year: 2023
Subjects: subject: Robotics (cs.RO)
subject: Artificial Intelligence (cs.AI)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: The shift towards electrification and autonomous driving in the automotive industry results in more and more automotive wire harnesses being installed in modern automobiles, which stresses the great significance of guaranteeing the quality of automotive wire harness assembly. The mating of connectors is essential in the final assembly of automotive wire harnesses due to the importance of connectors on wire harness connection and signal transmission. However, the current manual operation of mating connectors leads to severe problems regarding assembly quality and ergonomics, where the robotized assembly has been considered, and different vision-based solutions have been proposed to facilitate a better perception of the robot control system on connectors. Nonetheless, there has been a lack of deep learning-based solutions for detecting automotive wire harness connectors in previous literature. This paper presents a deep learning-based connector detection for robotized automotive wire harness assembly. A dataset of twenty automotive wire harness connectors was created to train and evaluate a two-stage and a one-stage object detection model, respectively. The experiment results indicate the effectiveness of deep learning-based connector detection for automotive wire harness assembly but are limited by the design of the exteriors of connectors.
description: This paper has been accepted by IEEE CASE 2023 and has been presented on the conference. The information of the published version will be updated later
Relativistic equation-of-motion coupled-cluster method using open-shell reference wavefunction
Creators: name: Pathak, Himadri
name: Sasmal, Sudip
name: Nayak, Malaya K.
name: Vaval, Nayana
name: Pal, Sourav
Publisher: name: arXiv
Year: 2016
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: The open-shell reference relativistic equation-of-motion coupled-cluster method within its four-component description is successfully implemented with the consideration of single- and double- excitation approximation. The one-body and two-body matrix elements required for the correlation calculation are generated using Dirac-Coulomb Hamiltonian. As a first attempt, the implemented method is employed to calculate a few of the low-lying ionized states of heavy atomic (Ag, Cs, Au, Fr, Lr) and valence ionization potential of molecular (HgH, PbF) systems, where the effect of relativity does really matter to obtain highly accurate results. Not only the relativistic effect, but also the effect of electron correlation is crucial in these heavy atomic and molecular systems. To justify the fact, we have taken two further approximations in the four-component relativistic equation-of-motion framework to quantify how the effect of electron correlation plays a role in the calculated values at different level of the approximation. All these calculated results are compared with the available experimental data as well as with other theoretically calculated values to judge the extent of accuracy obtained in our calculations. A nice agreement is achieved for all the considered systems which validates the performance of the open-shell reference relativistic equation-of-motion coupled-cluster method.
description: 10 pages
Massless Lüscher Terms and the Limitations of the AdS3 Asymptotic Bethe Ansatz
Creators: name: Abbott, Michael C.
name: Aniceto, Inês
Publisher: name: arXiv
Year: 2015
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In AdS5/CFT4 integrability the Bethe ansatz gives the spectrum of long strings, accurate up to exponentially small corrections. This is no longer true in AdS3, as we demonstrate here by studying Luscher F-terms with a massless particle running in the loop. We apply this to the classic test of Hernandez & Lopez, in which the su(2) sector Bethe equations (including one-loop dressing phase) should match the semiclassical string theory result for a circular spinning string. These calculations did not agree in AdS3xS3xT4, and we show that the sum of all massless Luscher F-terms can reproduce the difference.
description: 15 pages, 1 figure; v2:references, typos and clarifications
Exact asymptotic correlation functions of bilinear spin operators of the Heisenberg antiferromagnetic spin-$\frac{1}{2}$ chain
Creators: name: Vekua, Temo
name: Sun, Gaoyong
Publisher: name: arXiv
Year: 2016
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Exact asymptotic expressions of the uniform parts of the two-point correlation functions of bilinear spin operators in the Heisenberg antiferromagnetic spin-$\frac{1}{2}$ chain are obtained. Apart from the algebraic decay, the logarithmic contribution is identified, and the numerical prefactor is determined. We also confirm numerically the multiplicative logarithmic correction of the staggered part of the bilinear spin operators $\langle\langle S^{a}_0S^{a}_{1}S^{b}_{r}S^{b}_{r+1} \rangle\rangle=(-1)^rd/(r \ln^{\frac{3}{2}}r) +(3δ_{a,b}-1) \ln^2r /(12 π^4 r^4)$, and estimate the numerical prefactor as $d\simeq 0.067$. The relevance of our results for ground state fidelity susceptibility at the Berezinskii-Kosterlitz-Thouless quantum phase transition points in one-dimensional systems is discussed at the end of our work.
description: 10 pages, 2 figures
Performance of a resistive plate chamber equipped with a new prototype of amplified front-end electronics
Creators: name: Marchisone, Massimiliano
Publisher: name: arXiv
Year: 2016
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: ALICE is the LHC experiment dedicated to the study of heavy-ion collisions. At forward rapidity a muon spectrometer detects muons from low mass mesons, quarkonia, open heavy-flavor hadrons as well as weak bosons. A muon selection based on transverse momentum is made by a trigger system composed of 72 resistive plate chambers (RPCs). For the LHC Run 1 and the ongoing Run 2 the RPCs have been equipped with a non-amplified FEE called ADULT. However, in view of an increase in luminosity expected for Run 3 (2021-2023) the possibility to use an amplified FEE has been explored in order to improve the counting rate limitation and to prevent the aging of the detector, by reducing the charge per hit. A prototype of this new electronics (FEERIC) has been developed and tested first with cosmic rays before equipping one RPC in the ALICE cavern with it. In this paper the most important performance indicators - efficiency, dark current, dark rate, cluster size and total charge - of an RPC equipped with this new FEE will be reviewed and compared to the others read out with ADULT, in pp collisions at 5 and 13 TeV and in Pb-Pb collisions at 5 TeV.
More-Realistic Band Gaps from Meta-Generalized Gradient Approximations: Only in a Generalized Kohn-Sham Scheme
Creators: name: Yang, Zeng-hui
name: Peng, Haowei
name: Sun, Jianwei
name: Perdew, John P.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: Unlike the local density approximation (LDA) and the generalized gradient approximation (GGA), calculations with meta-generalized gradient approximations (meta-GGA) are usually done according to the generalized Kohn-Sham (gKS) formalism. The exchange-correlation potential of the gKS equation is non-multiplicative, which prevents systematic comparison of meta-GGA bandstructures to those of the LDA and the GGA. We implement the optimized effective potential (OEP) of the meta-GGA for periodic systems, which allows us to carry out meta-GGA calculations in the same KS manner as for the LDA and the GGA. We apply the OEP to several meta-GGAs, including the new SCAN functional [Phys. Rev. Lett. 115, 036402 (2015)]. We find that the KS gaps and KS band structures of meta-GGAs are close to those of GGAs. They are smaller than the more realistic gKS gaps of meta-GGAs, but probably close to the less-realistic gaps in the band structure of the exact KS potential, as can be seen by comparing with the gaps of the EXX+RPA OEP potential. The well-known grid sensitivity of meta-GGAs is much more severe in OEP calculations.
description: 10 pages, 10 figures
After the decline of the West : decolonization and the critical philosophy of history in France and North Africa
Creators: name: Savage, Dillon Bradley
name: 0000-0002-6238-5896
Publisher: name: The University of Texas at Austin
Year: 2023
Subjects: France
North Africa
Intellectual history
Decolonization
Philosophy of history
Critical philosophy of history

description: The work of investigating and reconstructing historical events does not bear any obvious relation to that of formulating theories of historical development or asking metaphysical questions about history’s meaning and direction. Yet every historian must make choices about which facts to highlight and how to represent and arrange them, and these choices have definite theoretical stakes. Elaborating these stakes and exploring their implications is one of the tasks of the critical philosophy of history, a mode of thought I examine in this dissertation by connecting it to French decolonization in North Africa. As this connection helps us understand, the critical philosophy of history also entails an essentially political task: judging and condemning the past in order to allow new life to emerge. For North African intellectuals, decolonization was an occasion to rethink history and reimagine the future. How to break free of histories defined by foreign domination without being reduced to passive victimhood or completely renouncing France’s significant cultural influence, which continues to mark the region? This question was central to the political and intellectual work of anticolonial nationalists for much of the twentieth century, taking on particular urgency for a broad public after World War II. I examine the resulting discussions and debates in order to contribute to a reframing of twentieth-century French intellectual history, which I seek to extend beyond the hexagon and onto new conceptual ground. The dissertation consists of four chapters following a loose chronological organization: the first two chapters begin with the interwar period—when mounting anxieties about Western decline coincided with heightened anticolonial agitation—and the second two focus on the era of decolonization. Chapter 1 examines the life and work of Mohand Tazerout (1893-1973), an Algerian-born intellectual best known for his translation into French of Oswald Spengler’s The Decline of the West. In chapter 2, I develop my conception of the critical philosophy of history by reading works by the French political philosopher Raymond Aron (1905-1983) alongside a critique by his Moroccan student, the historian Abdallah Laroui (b. 1933). Chapter 3 delves more deeply into Laroui’s work through a reading of his first book L’idéologie arabe contemporaine (Contemporary Arab ideology, 1967). Chapter 4 considers the postwar revival of interest in the medieval North African historian and philosopher Ibn Khaldun among Maghrebi and French anticolonial intellectuals. I conclude with a brief reflection on one of the dissertation's central themes, the concept of historical or cultural rebirth.
ePlace-3D: Electrostatics based Placement for 3D-ICs
Creators: name: Lu, Jingwei
name: Zhuang, Hao
name: Kang, Ilgweon
name: Chen, Pengwen
name: Cheng, Chung-Kuan
Publisher: name: arXiv
Year: 2015
Subjects: subject: Other Computer Science (cs.OH)
subject: FOS: Computer and information sciences

description: We propose a flat, analytic, mixed-size placement algorithm ePlace-3D for three-dimension integrated circuits (3D-ICs) using nonlinear optimization. Our contributions are (1) electrostatics based 3D density function with globally uniform smoothness (2) 3D numerical solution with improved spectral formulation (3) 3D nonlinear pre-conditioner for convergence acceleration (4) interleaved 2D-3D placement for efficiency enhancement. Our placer outperforms the leading work mPL6-3D and NTUplace3-3D with 6.44% and 37.15% shorter wirelength, 9.11% and 10.27% fewer 3D vertical interconnects (VI) on average of IBM-PLACE circuits. Validation on the large-scale modern mixed-size (MMS) 3D circuits shows high performance and scalability.
description: 8 pages, 7 figures, ISPD 2016
Local noise in a diffusive conductor
Creators: name: Tikhonov, E. S.
name: Shovkun, D. V.
name: Ercolani, D.
name: Rossella, F.
name: Rocci, M.
name: Sorba, L.
name: Roddaro, S.
name: Khrapai, V. S.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The control and measurement of local non-equilibrium configurations is of utmost importance in applications on energy harvesting, thermoelectrics and heat management in nano-electronics. This challenging task can be achieved with the help of various local probes, prominent examples including superconducting or quantum dot based tunnel junctions, classical and quantum resistors, and Raman thermography. Beyond time-averaged properties, valuable information can also be gained from spontaneous fluctuations of current (noise). From these perspective, however, a fundamental constraint is set by current conservation, which makes noise a characteristic of the whole conductor, rather than some part of it. Here we demonstrate how to remove this obstacle and pick up a local noise temperature of a current biased diffusive conductor with the help of a miniature noise probe. This approach is virtually noninvasive and extends primary local measurements towards strongly non-equilibrium regimes.
description: minor revision, accepted in Scientific Reports
Kriminalitätsbericht 2012. Statistik und Analyse
Creators: name: (:Unkn) Unknown
Publisher: name: Universität Tübingen
Year: 2012
Subjects: subject: Österreich , Kriminalität , Statistik
subject: 360

description: Mit dem vorliegenden Kriminalitätsbericht werden die von den Sicherheitsbehörden und Sicherheitsdienststellen im Berichtsjahr gemeldeten Daten über die bekannt gewordenen gerichtlich strafbaren Handlungen veröffentlicht. Der Kriminalitätsbericht ist eine Anzeigenstatistik, das heißt, die Daten werden anlässlich der Vorlage der Anzeige über eine strafbare Handlung an die Strafverfolgungsbehörde in die Datenbank der EDV-Zentrale des Bundesministeriums für Inneres gespeichert, dort aufbereitet und vom Bundeskriminalamt zu den veröffentlichten Tabellen verarbeitet. Ziel des Kriminalitätsberichtes ist es, unter sinnvoller Beschränkung der zu erfassenden Daten und mit ökonomisch vertretbarem Arbeitsaufwand ein möglichst umfassendes und realitätsgerechtes Bild des bekannt gewordenen kriminellen Geschehens zu bieten.
Can a concern for status reconcile diverse social welfare programs?
Creators: name: Stark, Oded
name: Jakubek, Marcin
Publisher: name: Universität Tübingen
Year: 2016
Subjects: subject: Volkswirtschaft
subject: 330
subject: Maximization of social welfare
subject: Rawlsian social welfare function
subject: Utilitarian social welfare function
subject: Inefficient policy of income redistribution
subject: Distaste for low status

description: Let there be two individuals: “rich,” and “poor.” Due to inefficiency of the income redistribution policy, if a social planner were to tax the rich in order to transfer to the poor, only a fraction of the taxed income would be given to the poor. Under such inefficiency and a standard utility specification, a Rawlsian social planner who seeks to maximize the utility of the worst-off individual will select a different allocation of incomes than a utilitarian social planner who seeks to maximize the sum of the individuals’ utilities. However, when individuals prefer not only to have more income but also not to have low status conceptualized as low relative income, and when this distaste is incorporated in the individuals’ utility functions with a weight that is greater than a specified critical level, then a utilitarian social planner will select the very same income distribution as a Rawlsian social planner.
Probing interstellar turbulence in cirrus with deep optical imaging: no sign of energy dissipation at 0.01 pc scale
Creators: name: Miville-Deschenes, M. -A.
name: Duc, P. -A.
name: Marleau, F.
name: Cuillandre, J. -C.
name: Didelon, P.
name: Gwyn, S.
name: Karabal, E.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Diffuse Galactic light has been observed in the optical since the 1930s. We propose that, when observed in the optical with deep imaging surveys, it can be used as a tracer of the turbulent cascade in the diffuse interstellar medium (ISM), down to scales of about 1 arcsec. Here we present a power spectrum analysis of the dust column density of a diffuse cirrus at high Galactic latitude (l ~ 198 deg, b ~ 32 deg) as derived from the combination of a MegaCam g-band image, obtained as part of the MATLAS large programme at the CFHT, with Planck radiance and Wise 12 micron data. The combination of these three datasets have allowed us to compute the density power spectrum of the HI over scales of more than three orders of magnitude. We found that the density field is well described by a single power law over scales ranging from 0.01 to 50 pc. The exponent of the power spectrum, gamma=-2.9 +- 0.1, is compatible with what is expected for thermally bi-stable and turbulent HI. We did not find any steepening of the power spectrum at small scales indicating that the typical scale at which turbulent energy is dissipated in this medium is smaller than 0.01pc. The ambipolar diffusion scenario that is usually proposed as the main dissipative agent, is consistent with our data only if the density of the cloud observed is higher than the typical values assumed for the cold neutral medium gas. We discuss the new avenue offered by deep optical imaging surveys for the study of the low density ISM structure and turbulence.
description: accepted for publication in A&A
Phenomenology of Scalar Leptoquarks at the LHC in Explaining the Radiative Neutrino Mass, Muon $g-2$ and Lepton Flavour Violating Observables
Creators: name: Parashar, Snehashis
name: Karan, Anirban
name: Avnish
name: Bandyopadhyay, Priyotosh
name: Ghosh, Kirtiman
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study the phenomenology of a particular leptoquark extension of the Standard Model (SM), namely the doublet-singlet scalar leptoquark extension of the SM (DSL-SM). Besides generating Majorana mass for neutrinos, these leptoquarks contribute to muon and electron $(g-2)$ and various lepton flavour violating processes. Collider signatures of the benchmark points (BPs), consistent with the neutrino oscillation data, anomalous muon/electron magnetic moments, experimental bounds on the charged lepton flavour violation observables, etc., are studied at the LHC/FCC with centre-of-mass energies of 14, 27 and 100 TeV. While the two $-1/3$ charged colored scalars from singlet and doublet leptoquark mix with each other, the charge $2/3$ colored scalar from the doublet leptoquark remains pure. With a near-degenerate mass spectrum, the pure and mixed leptoquark states are shown to be distinguishable from multiple finalstates, while discerning between the two mixed states remain very challenging.
description: 49 pages, 33 figures and 18 tables
TaIrTe4 a ternary Type-II Weyl semi-metal
Creators: name: Koepernik, K.
name: Kasinathan, D.
name: Efremov, D. V.
name: Khim, Seunghyun
name: Borisenko, Sergey
name: Büchner, Bernd
name: Brink, Jeroen van den
Publisher: name: arXiv
Year: 2016
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: In metallic condensed matter systems two different types of Weyl fermions can in principle emerge, with either a vanishing (type-I) or with a finite (type-II) density of states at the Weyl node energy. So far only WTe2 and MoTe2 were predicted to be type-II Weyl semi-metals. Here we identify TaIrTe4 as a third member of this family of topological semi-metals. TaIrTe4 has the attractive feature that it hosts only four well-separated Weyl points, the minimum imposed by symmetry. Moreover, the resulting topological surface states - Fermi arcs connecting Weyl nodes of opposite chirality - extend to about 1/3 of the surface Brillouin zone. This large momentum-space separation is very favorable for detecting the Fermi arcs spectroscopically and in transport experiments.
Sparse deep neural networks for modeling aluminum electrolysis dynamics
Creators: name: Lundby, Erlend Torje Berg
name: Rasheed, Adil
name: Halvorsen, Ivar Johan
name: Gravdahl, Jan Tommy
Publisher: name: arXiv
Year: 2022
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: Machine Learning (cs.LG)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Deep neural networks have become very popular in modeling complex nonlinear processes due to their extraordinary ability to fit arbitrary nonlinear functions from data with minimal expert intervention. However, they are almost always overparameterized and challenging to interpret due to their internal complexity. Furthermore, the optimization process to find the learned model parameters can be unstable due to the process getting stuck in local minima. In this work, we demonstrate the value of sparse regularization techniques to significantly reduce the model complexity. We demonstrate this for the case of an aluminium extraction process, which is highly nonlinear system with many interrelated subprocesses. We trained a densely connected deep neural network to model the process and then compared the effects of sparsity promoting l1 regularization on generalizability, interpretability, and training stability. We found that the regularization significantly reduces model complexity compared to a corresponding dense neural network. We argue that this makes the model more interpretable, and show that training an ensemble of sparse neural networks with different parameter initializations often converges to similar model structures with similar learned input features. Furthermore, the empirical study shows that the resulting sparse models generalize better from small training sets than their dense counterparts.
description: 32 pages, 18 figures
A cointegrating polynomial regression analysis of the material Kuznets curve hypothesis
Creators: name: Frondel, Manuel
name: Grabarczyk, Peter
name: Sommer, Stephan
name: Wagner, Martin
Publisher: name: Technische Universität Dortmund
Year: 2016
Subjects: subject: intensity of use
subject: nonlinear cointegration
subject: metals
subject: 310
subject: 330
subject: 620

description: Employing consumption data for aluminum, lead and zinc for eight OECD countries spanning from 1900 to 2006, this paper tests the hypothesis underlying the notion of the Material Kuznets Curve (MKC), which postulates an inverted U-shaped relationship between a country’s level of economic development and its intensity of metal use. Applying the tests and estimation techniques for nonlinear cointegration developed by Saikkonen and Choi (2004),Wagner (2013) as well as Wagner and Hong (2016), we find that the MKC hypothesis is less strongly supported by the data than when employing the standard methods that have been used in the empirical Environmental Kuznets Curve (EKC) literature so far. The evidence for a cointegrating MKC is mixed, at best.
description: Discussion Paper / SFB823;72, 2016
Multiple Change Point Analysis: Fast Implementation And Strong Consistency
Creators: name: Ding, Jie
name: Xiang, Yu
name: Shen, Lu
name: Tarokh, Vahid
Publisher: name: arXiv
Year: 2016
Subjects: subject: Methodology (stat.ME)
subject: FOS: Computer and information sciences

description: One of the main challenges in identifying structural changes in stochastic processes is to carry out analysis for time series with dependency structure in a computationally tractable way. Another challenge is that the number of true change points is usually unknown, requiring a suitable model selection criterion to arrive at informative conclusions. To address the first challenge, we model the data generating process as a segment-wise autoregression, which is composed of several segments (time epochs), each of which modeled by an autoregressive model. We propose a multi-window method that is both effective and efficient for discovering the structural changes. The proposed approach was motivated by transforming a segment-wise autoregression into a multivariate time series that is asymptotically segment-wise independent and identically distributed. To address the second challenge, we derive theoretical guarantees for (almost surely) selecting the true number of change points of segment-wise independent multivariate time series. Specifically, under mild assumptions, we show that a Bayesian Information Criterion (BIC)-like criterion gives a strongly consistent selection of the optimal number of change points, while an Akaike Information Criterion (AIC)-like criterion cannot. Finally, we demonstrate the theory and strength of the proposed algorithms by experiments on both synthetic and real-world data, including the Eastern US temperature data and the El Nino data from 1854 to 2015. The experiment leads to some interesting discoveries about temporal variability of the summer-time temperature over the Eastern US, and about the most dominant factor of ocean influence on climate.
description: A preliminary version of this work was presented in ICML 2016 Anomaly Detection Workshop
The Cloud Strikes Back: Investigating the Decentralization of IPFS
Creators: name: Balduf, Leonhard
name: Korczyński, Maciej
name: Ascigil, Onur
name: Keizer, Navin V.
name: Pavlou, George
name: Scheuermann, Björn
name: Król, Michał
Publisher: name: arXiv
Year: 2023
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: Interplanetary Filesystem (IPFS) is one of the largest peer-to-peer filesystems in operation. The network is the default storage layer for Web3 and is being presented as a solution to the centralization of the web. In this paper, we present a large-scale, multi-modal measurement study of the IPFS network. We analyze the topology, the traffic, the content providers and the entry points from the classical Internet. Our measurements show significant centralization in the IPFS network and a high share of nodes hosted in the cloud. We also shed light on the main stakeholders in the ecosystem. We discuss key challenges that might disrupt continuing efforts to decentralize the Web and highlight multiple properties that are creating pressures toward centralization.
description: To be presented at IMC'23
Batch Layer Normalization, A new normalization layer for CNNs and RNN
Creators: name: Ziaee, Amir
name: Çano, Erion
Publisher: name: arXiv
Year: 2022
Subjects: subject: Machine Learning (cs.LG)
subject: Artificial Intelligence (cs.AI)
subject: Neural and Evolutionary Computing (cs.NE)
subject: FOS: Computer and information sciences

description: This study introduces a new normalization layer termed Batch Layer Normalization (BLN) to reduce the problem of internal covariate shift in deep neural network layers. As a combined version of batch and layer normalization, BLN adaptively puts appropriate weight on mini-batch and feature normalization based on the inverse size of mini-batches to normalize the input to a layer during the learning process. It also performs the exact computation with a minor change at inference times, using either mini-batch statistics or population statistics. The decision process to either use statistics of mini-batch or population gives BLN the ability to play a comprehensive role in the hyper-parameter optimization process of models. The key advantage of BLN is the support of the theoretical analysis of being independent of the input data, and its statistical configuration heavily depends on the task performed, the amount of training data, and the size of batches. Test results indicate the application potential of BLN and its faster convergence than batch normalization and layer normalization in both Convolutional and Recurrent Neural Networks. The code of the experiments is publicly available online (https://github.com/A2Amir/Batch-Layer-Normalization).
description: Published in proceedings of the 6th international conference on Advances in Artificial Intelligence, ICAAI 2022, Birmingham, UK
The collateral effects of varying antecedent exercise intensities on stereotypy and other adaptive behaviors in children with autism
Creators: name: Wong, Travis Chong Ching
name: 0000-0003-1675-6016
Publisher: name: The University of Texas at Austin
Year: 2023
Subjects: Exercise
Antecedent exercise
Stereotypy
Engagement
Autism spectrum disorder

description: The prevalence rate of individuals with autism spectrum disorder (ASD) is increasing. One of the main deficits among people diagnosed with ASD is the presence of stereotypy. More importantly, stereotypy are difficult to reduce because they are often maintained by automatic reinforcement and do not have clear antecedent or trigger to these behaviors. Most interventions that are often used to address stereotypy are consequence- and punishment-based interventions, such as response interruption and redirection and response blocking. Although these interventions are effective in reducing stereotypy, they are only implemented after the stereotypy are exhibited and practitioners need to be trained to implement these interventions. In addition, they may produce negative behavioral side effects, such as tantrum behaviors and aggression. Consequently, more research has been focusing on developing antecedent-based interventions on reducing stereotypic behaviors that would also prevent negative side effects. Recent research have indicated that antecedent physical exercise interventions can lead to significant reduction of stereotypy and also many other positive collateral effects, such as increased level of academic engagement. However, various types of exercises have been incorporated in previous research and there is not enough evidence to suggest which type of physical exercise interventions or specific intervention parameters yield the largest reduction in stereotypy. Therefore, the purpose of this study was to investigate the effects of varying antecedent exercise intensities and examine whether exercise intervention with higher intensity are more effective in reducing stereotypic behaviors than lower intensity exercise intervention. In addition, this study examined participants’ subsequent task engagement or functional play as collateral effects. Results indicated that children with ASD who engage in stereotypy can benefit from antecedent exercise regardless of the exercise intensity. However, the findings suggested that higher intensity antecedent exercise led to lower levels of subsequent stereotypy and higher levels of other adaptive behaviors when compared to lower intensity antecedent exercise. Potential implications and recommendations for practitioners working with children with ASD who engage in stereotypy are provided, in addition to possible areas of future research.
New Quantum Spin Hall Insulator in Two-dimensional MoS$_2$ with Periodically Distributed Pores
Creators: name: Liu, Peng-Fei
name: Zhou, Liujiang
name: Frauenheim, Thomas
name: Wu, Li-Ming
Publisher: name: arXiv
Year: 2015
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: MoS$_2$, one of transition metal dichalcogenides (TMDs), has caused a lot of attentions for its excellent semiconductor characteristics and potential applications. Here, based on the density functional theory methods, we predict a novel 2D quantum spin hall (QSH) insulator in the porous allotrope of monolayer MoS$_2$ (g-MoS$_2$), consisting of MoS$_2$ square and hexagon. The g-MoS$_2$ has a nontrivial gap as large as 109 meV, comparable with previous reported 1T'-MoS$_2$ (80 meV), so-MoS$_2$ (25 meV). We demonstrate that the origin of 2D QSH effect in g-MoS$_2$ originates from the pure d-d band interaction, different from conventional band inversion between s$-$p, p$-$p or d$-$p orbitals. Such new polymorph greatly enriches the TMDs family and its stabilities are confirmed by phonon spectrum analysis. In particular, porous structure also endows it potential application in efficient gas separation and energy storage.
Geometrical mutual information at the tricritical point of the two-dimensional Blume-Capel model
Creators: name: Mandal, Ipsita
name: Inglis, Stephen
name: Melko, Roger G.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: High Energy Physics - Theory (hep-th)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The spin-1 classical Blume-Capel model on a square lattice is known to exhibit a finite-temperature phase transition described by the tricritical Ising CFT in 1+1 space-time dimensions. This phase transition can be accessed with classical Monte Carlo simulations, which, via a replica-trick calculation, can be used to study the shape-dependence of the classical Rényi entropies for a torus divided into two cylinders. From the second Rényi entropy, we calculate the Geometrical Mutual Information (GMI) introduced by Stéphan et. al. [Phys. Rev. Lett. 112, 127204 (2014)] and use it to extract a numerical estimate for the value of the central charge near the tricritical point. By comparing to the known CFT result, $c=7/10$, we demonstrate how this type of GMI calculation can be used to estimate the position of the tricritical point in the phase diagram.
description: version accepted in JSTAT
Emergent isotropy of a wave-turbulent cascade in the Gross-Pitaevskii model
Creators: name: Sano, Yuto
name: Navon, Nir
name: Tsubota, Makoto
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: The restoration of symmetries is one of the most fascinating properties of turbulence. We report a study of the emergence of isotropy in the Gross-Pitaevskii model with anisotropic forcing. Inspired by recent experiments, we study the dynamics of a Bose-Einstein condensate in a cylindrical box driven along the symmetry axis of the trap by a spatially uniform force. We introduce a measure of anisotropy $A(k,t)$ defined on the momentum distributions $n(\boldsymbol{k},t)$, and study the evolution of $A(k,t)$ and $n(\boldsymbol{k},t)$ as turbulence proceeds. As the system reaches a steady state, the anisotropy, large at low momenta because of the large-scale forcing, is greatly reduced at high momenta. While $n(\boldsymbol{k},t)$ exhibits a self-similar cascade front propagation, $A(k,t)$ decreases without such self-similar dynamics. Finally, our numerical calculations show that the isotropy of the steady state is robust with respect to the amplitude of the drive.
description: 7 pages, 5 figures
Variations of the HCO$^{+}$, HCN, HNC, N$_2$H$^+$ and NH$_{3}$ deuterium fractionation in high-mass star-forming regions
Creators: name: Pazukhin, A. G.
name: Zinchenko, I. I.
name: Trofimova, E. A.
name: Henkel, C.
name: Semenov, D. A.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We use spectra and maps of the $J=1-0$ and $J=2-1$ DCO$^{+}$, DCN, DNC, $\rm N_2D^+$ lines and $1_{11}-1_{01}$ ortho- and para-NH$_{2}$D lines, obtained with the IRAM-30m telescope, as well as observations of their hydrogenated isotopologues to study deuteration processes in five high-mass star-forming regions. The temperature was estimated from CH$_3$CCH lines, also observed with the IRAM-30m telescope, and from NH$_3$ lines, observed with the 100-m radio telescope in Effelsberg, as well as using the integrated intensity ratios of the $J=1-0$ H$^{13}$CN and HN$^{13}$C lines and their main isotopologues. Applying a non-LTE radiative transfer model with RADEX, the gas density and the molecular column densities were estimated. D/H ratios are $0.001-0.05$ for DCO$^{+}$, $0.001-0.02$ for DCN, $0.001-0.05$ for DNC and $0.02-0.4$ for NH$_{2}$D. The D/H ratios decrease with increasing temperature in the range of $\rm 20-40 \,K$ and slightly vary at densities $n(\rm H_2) \sim 10^4-10^6\, cm^{-3}$. The deuterium fraction of $\rm N_2H^{+}$ is $0.008-0.1$ at temperatures in the range of $\rm 20-25\, K$ and at a density of $\sim 10^5\, \rm cm^{-3}$. We also estimate relative abundances and find $ \sim 10^{-11}-10^{-9}$ for DCO$^{+}$ and DNC, $ \sim 10^{-11}-10^{-10}$ for $\rm N_2D^+$ and $ \sim 10^{-10}-10^{-8}$ for NH$_{2}$D. The relative abundances of these species decrease with increasing temperature. However, the DCN/H$_2$ ratio is almost constant ($\sim 10^{-10}$). The observational results agree with the predictions of chemical models (although in some cases there are significant differences).
description: 13 pages + appendix (25 pages total), 11 figures. Accepted for publication in MNRAS
Singular equivalence of finite dimensional algebras with radical square zero
Creators: name: Nasr-Isfahani, Alireza
Publisher: name: arXiv
Year: 2016
Subjects: subject: Rings and Algebras (math.RA)
subject: Representation Theory (math.RT)
subject: FOS: Mathematics
subject: 16E35, 16E45, 16W50

description: We prove that the Crisp and Gow's quiver operation on a finite quiver Q produces a new quiver Q' with fewer vertices, such that the finite dimensional algebras kQ/J^2 and kQ'/J^2 are singularly equivalent. This operation is a general quiver operation which includes as specific examples some operations which arise naturally in symbolic dynamics (e.g., (elementary) strong shift equivalent, (in-out) splitting, source elimination, etc.).
description: to appear in J. Pure Appl. Algebra
Systematic DFT+U and Quantum Monte Carlo benchmark of magnetic two-dimensional (2D) CrX$_3$ (X = I, Br, Cl, F)
Creators: name: Wines, Daniel
name: Choudhary, Kamal
name: Tavazza, Francesca
Publisher: name: arXiv
Year: 2022
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The search for two-dimensional (2D) magnetic materials has attracted a great deal of attention because of the experimental synthesis of 2D CrI$_3$, which has a measured Curie temperature of 45 K. Often times, these monolayers have a higher degree of electron correlation and require more sophisticated methods beyond density functional theory (DFT). Diffusion Monte Carlo (DMC) is a correlated electronic structure method that has been demonstrated successful for calculating the electronic and magnetic properties of a wide variety of 2D and bulk systems, since it has a weaker dependence on the Hubbard parameter (U) and density functional. In this study we designed a workflow that combines DFT+U and DMC in order to treat 2D correlated magnetic systems. We chose monolayer CrX$_3$ (X = I, Br, Cl, F), with a stronger focus on CrI$_3$ and CrBr$_3$, as a case study due to the fact that they have been experimentally realized and have a finite critical temperature. With this DFT+U and DMC workflow and the analytical method of Torelli and Olsen, we estimated an upper bound of 43.56 K for the T$_c$ of CrI$_3$ and 20.78 K for the T$_c$ of CrBr$_3$, in addition to analyzing the spin densities and magnetic properties with DMC and DFT+U. We expect that running this workflow for a well-known material class will aid in the future discovery and characterization of lesser known and more complex correlated 2D magnetic materials.
title: Philological Notes on the Letter lambda in a New Greek-English Dictionary. II. λασιόκνημος – λημψαπόδοσις
Creators: name: Olson, S. Douglas
Publisher: name: Hyperboreus 29: 2 (2023) 299–325
Year: 2023

description: Part II. Two generations ago, Robert Renehan published a series of articles expanding, refining, and correcting entries in the 9th edition of the monumental Liddell–Scott–Jones Greek-English Lexicon (1940) as supplemented by Barber and his fellow editors (1968). These notes on the letter lambda in the new Brill Dictionary of Ancient Greek are offered in a similar spirit.
Der Zusammenhang von Theologie und Pädagogik aus biblischer Sicht
Creators: name: Faix, Wilhelm
Publisher: name: Jahrbuch für evangelikale Theologie
Year: 2025

description: 1646721128
description: Jahrbuch für evangelikale Theologie, V. 23 (2009): Jahrbuch für evangelikale Theologie, Band 23
Our street/our life : staging Detroit identity in 2001 Hastings Street
Creators: name: Fried, Rebecca I.
Publisher: name: The University of Texas at Austin
Year: 2005
Subjects: Detroit identity
2001 Hastings Street
Play analysis

description: This thesis is an analysis of the play 2001 Hastings Street, written and performed by the Mosaic Youth Theatre of Detroit from 2000 to 2001. Mosaic, a community-based youth theater, created Hastings Street from personal narratives about a thriving black neighborhood just east of downtown that had been bulldozed in the name of “urban renewal.” I argue that the play stages Detroit identity such that it promotes cultural democracy among the city’s misplaced residents. The first chapter takes up the relationship between performance and identity formation, the second chapter analyses the text of the play, and the third chapter discusses the play in performance