cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Low harmonic content three-phase-to-DC-conversion using AC-side switches and discontinuous conduction mode
Creators: name: Carlton, Dan
Publisher: name: University of British Columbia
Year: 2009

description: The quality of AC power is affected by the large number of nonlinear loads, particularly power converter systems. One way of improving the power factor of AC-DC converters in the 3-100 kW power range is by using Pulse Width Modulation rectifiers with low effects on the mains. The three-phase Power Factor Correction circuits process the whole amount of power transferred, using inductors whose current is controlled at switching frequencies above 20 kHz. Based on the inductor energy being fully or partially transferred to the output within a switching cycle, the operation is called Discontinuous or Continuous Conduction Mode. The definition comes from the shape of the inductor current, whether or not it reaches zero every switching cycle. The present work brings a contribution to the knowledge about three-phase Power Factor Correction in the Discontinuous Conduction Mode. These circuits are characterized by the small size of the inductors and simple voltage follower control with the downside of higher component stress and large input filters. The thesis investigates the performance features of circuits with AC-side switches. Two new circuits, the boost-delta and boost-star, with very competitive features emerge. The possibility of using bi-directional and quasi tri-directional switches is explored. New analytical tools are developed for the study of circuits operating in Discontinuous Conduction Mode. The average current space vector method brings a new insight into the operation of the circuits. Thus, the development of modulation techniques which improve the Total Harmonic Distortion down to zero becomes possible. Moreover, a sinusoidal current waveform in lightly unbalanced voltage systems is achievable. New circuits using two boost stages, series connected, are proposed. Advantageous features are derived without any compromise. The SEPIC converter with AC-side switches is also analyzed. A comparison is drawn among the investigated circuits. The possibility of staggered operation of several stages, which reduces the amount of ripple on the input is analyzed in this context. The contribution of the thesis consists in finding theoretically viable options for achieving high power factors with very low harmonic content in Discontinuous Conduction Mode.
Specific heat, magnetic susceptibility, resistivity and thermal expansion of the superconductor ZrB12
Creators: name: Lortz, R.
name: Wang, Y.
name: Abe, S.
name: Meingast, C.
name: Paderno, Yu. B.
name: Filippov, V.
name: Junod, A.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: In an attempt to clarify conflicting published data, we report new measurements of specific heat, resistivity, magnetic susceptibility, and thermal expansivity up to room temperature for the 6 K superconductor ZrB12, using well-characterized single crystals with a residual resistivity ratio >9. The specific heat gives the bulk result 2*delta(0)/(k_B*Tc)=3.7 for the superconducting gap ratio, and excludes multiple gaps and d-wave symmetry for the Cooper pairs. The Sommerfeld constant gamma_n = 0.34 mJ K-2 gat-1 and the magnetic susceptibility xsi = -2.1 x 10^-5 indicate a low density of states at the Fermi level. The Debye temperature theta_D is in the range 1000-1200 K near zero and room temperature, but decreases by a factor of ~2 at ~35 K. The specific heat and resistivity curves are inverted to yield approximations of the phonon density of states F(omega) and the spectral electron-phonon scattering function alpha_tr^2 F(omega), respectively. Both unveil a 15 meV mode, attributed to Zr vibrations in oversized B cages, which gives rise to electron-phonon coupling. The thermal expansivity further shows that this mode is anharmonic, while the vanishingly small discontinuity at Tc establishes that the cell volume is nearly optimal with respect to Tc.
description: v3: minor changes in the thermal expansion paragraph submitted to Physical Review B
The effect of refugee resettlement on physical educators’ behaviors and teaching practice
Creators: name: Sears, Jack Vaughn
name: 0000-0001-5768-7948
Publisher: name: The University of Texas at Austin
Year: 2019
Subjects: Refugee
Cultural competency
Physical education

description: Refugee resettlement is the direct result of persecution brought on by politics, war, ethnic violence, or religious persecution. The United States has traditionally been the place where many refugees settle. Refugee families find their way to cities all across America with hope for a better life, employment and quality education for their children. The physical education (PE) teacher typically has interaction with every student in the school, and is likely to affect, and be affected by, a refugee students’ school experience. Currently, there is little to no research concerning the beliefs and subsequent behaviors and teaching practices of PE teachers interacting with refugees. The purpose of this phenomenological multiple case study is to examine the personal, cultural, and professional experiences of physical educators in schools where there is a substantial refugee student population. James Banks’ conceptual framework of multicultural education was used to help discover how PE teachers create PE learning environments that are relevant and beneficial to refugee students. Research questions sought to understand how refugees affect the PE teacher’s beliefs, behavior, cultural sensitivity and pedagogical practices. This study was conducted over a two-year period and qualitative data was collected from seventeen PE teachers. A snowball sampling method allowed for more teachers to participate therefore allowing the potential for further enrichment of the study. While completing the literature review, a pilot study was conducted, interviewing and observing five teachers. Overall, seventeen participants were interviewed, and twenty-one observations of PE classes were made. Relevant artifacts were collected along with the researcher’s field and observation notes. Upon completion of all interviews and observations a thorough analysis was completed and brought to a conclusion for submission in this dissertation. Findings indicated seven primary themes: the presence of refugee students will shape teaching practices; language and culture influence relationships and teaching; professional development is deficient; a student’s culture may enlighten one’s worldview; diversity in the classroom may reduce prejudice; the PE teacher becomes aware of adverse childhood experiences; and cultural competency matters. Findings indicated that the behaviors and practices of PE teachers are affected by the presence of refugee students. PE teachers recognize that this phenomenon of diverse student populations in the classroom makes the learning and teaching experience challenging and influential.
Selfish Sparse RNN Training
Creators: name: Liu, Shiwei
name: Mocanu, Decebal Constantin
name: Pei, Yulong
name: Pechenizkiy, Mykola
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (cs.LG)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: Sparse neural networks have been widely applied to reduce the computational demands of training and deploying over-parameterized deep neural networks. For inference acceleration, methods that discover a sparse network from a pre-trained dense network (dense-to-sparse training) work effectively. Recently, dynamic sparse training (DST) has been proposed to train sparse neural networks without pre-training a dense model (sparse-to-sparse training), so that the training process can also be accelerated. However, previous sparse-to-sparse methods mainly focus on Multilayer Perceptron Networks (MLPs) and Convolutional Neural Networks (CNNs), failing to match the performance of dense-to-sparse methods in the Recurrent Neural Networks (RNNs) setting. In this paper, we propose an approach to train intrinsically sparse RNNs with a fixed parameter count in one single run, without compromising performance. During training, we allow RNN layers to have a non-uniform redistribution across cell gates for better regularization. Further, we propose SNT-ASGD, a novel variant of the averaged stochastic gradient optimizer, which significantly improves the performance of all sparse training methods for RNNs. Using these strategies, we achieve state-of-the-art sparse training results, better than the dense-to-sparse methods, with various types of RNNs on Penn TreeBank and Wikitext-2 datasets. Our codes are available at https://github.com/Shiweiliuiiiiiii/Selfish-RNN.
description: Published in Proceedings of the 38th International Conference on Machine Learning. Code can be found in https://github.com/Shiweiliuiiiiiii/Selfish-RNN
The Laser Calibration System of the ALICE Time Projection Chamber
Creators: name: Renault, G.
name: Nielsen, B. S.
name: Westergaard, J.
name: Gaardhøje, J. J.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: A Large Ion Collider Experiment (ALICE) is the only experiment at the Large Hadron Collider (LHC) dedicated to the study of heavy ion collisions. The Time Projection Chamber (TPC) is the main tracking detector covering the pseudo rapidity range $|η|< 0.9$. It is designed for a maximum multiplicity \dNdy = 8000. The aim of the laser system is to simulate ionizing tracks at predifined positions throughout the drift volume in order to monitor the TPC response to a known source. In particular, the alignment of the read-out chambers will be performed, and variations of the drift velocity due to drift field imperfections can be measured and used as calibration data in the physics data analysis. In this paper we present the design of the pulsed UV laser and optical system, together with the control and monitoring systems.
description: 4 pages, 3 figures
Extending FABRIK with avoidance obstacle for solving the inverse kinematics problem
Creators: name: Songqiao Tao
Publisher: name: figshare
Year: 2021
Subjects: subject: 90602 Control Systems, Robotics and Automation
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: 逆运动学（IK）已广泛应用于机器人技术，计算机动画，人体工程学和游戏领域。它通常用于确定机器人模型的关节配置并获得所需的末端执行器 在机器人技术中的位置。前进和后退反向运动学（FABRIK）是一种向前和向后迭代的方法，可通过在直线上定位点而不是使用角度旋转或矩阵来查找更新的关节位置，它具有收敛速度快，计算成本低和可视化逼真的优点。姿势。由于联合链通常在复杂的环境中工作，因此很容易干扰其周围的情况。为了避免障碍物并使末端执行器到达所需位置，本文引入了局部优化旋转技术来扩展基本的FABRIK。实验结果表明，扩展的FABRIK具有避开障碍物并使末端执行器到达目标位置的能力。
Revisit the tetraquark candidates in the $J/ψJ/ψ$ mass spectrum
Creators: name: Wang, Zhi-Gang
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In this article, we introduce a relative P-wave to construct the doubly-charm axialvector diquark operator, then take the doubly-charm axialvector (anti)diquark operator as the basic constituent to construct the scalar and tensor tetraquark currents to study the scalar, axialvector and tensor fully-charm tetraquark states with the QCD sum rules. We observe that the ground state $\tilde{A}\tilde{A}$ type tetraquark states and the first radial excited states of the $AA$ type tetraquark states have almost degenerated masses, where the $\tilde{A}$ and $A$ stand for the diquark operators with and without the relative P-wave respectively, the broad structure above the $J/ψJ/ψ$ threshold maybe consist of several diquark-antidiquark type fully-charm tetraquark states.
description: 11 pages, 3 figures. arXiv admin note: text overlap with arXiv:2006.13028
Superexchange in Dilute Magnetic Dielectrics: Application to (Ti,Co)O_2
Creators: name: Kikoin, K.
name: Fleurov, V.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We extend the model of ferromagnetic superexchange in dilute magnetic semiconductors to the ferromagnetically ordered highly insulating compounds (dilute magnetic dielectrics). The intrinsic ferromagnetism without free carriers is observed in oxygen-deficient films of anatase TiO_2 doped with transition metal impurities in cation sublattice. We suppose that ferromagnetic order arises due to superexchange between complexes [oxygen vacancies + magnetic impurities], which are stabilized by charge transfer from vacancies to impurities. The Hund rule controls the superexchange via empty vacancy related levels so that it becomes possible only for the parallel orientation of impurity magnetic moments. The percolation threshold for magnetic ordering is determined by the radius of vacancy levels, but the exchange mechanism does not require free carriers. The crucial role of the non-stoichiometry in formation of the ferromagnetism makes the Curie temperatures extremely sensitive to the methods of sample preparation.
description: 18 pages, 2 figures
Vortex Sheet Turbulence as Solvable String Theory
Creators: name: Migdal, Alexander
Publisher: name: arXiv
Year: 2020
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: High Energy Physics - Theory (hep-th)
subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: We study steady vortex sheet solutions of the Navier-Stokes in the limit of vanishing viscosity at fixed energy flow. We refer to this as the turbulent limit. These steady flows correspond to a minimum of the Euler Hamiltonian as a functional of the tangent discontinuity of the local velocity parametrized as $Δ\vec v_t =\vec \nabla Γ$. This observation means that the steady flow represents the low-temperature limit of the Gibbs distribution for vortex sheet dynamics. The normal displacement $δr_\perp$ of the vortex sheet as a Hamiltonian coordinate and $Γ$ as a conjugate momentum. An infinite number of Euler conservation laws lead to a degenerate vacuum of this system, which explains the complexity of turbulence statistics and provides the relevant degrees of freedom (random surfaces). The simplest example of a steady solution of the Navier-Stokes equation in the turbulent limit is a spherical vortex sheet, which we investigate. This family of steady solutions provides an example of the Euler instanton advocated in our recent work, which is supposed to be responsible for the dissipation of the \NS{} equation in the turbulent limit. We further conclude that one can obtain turbulent statistics from the Gibbs statistics of vortex sheets by adding Lagrange multipliers for the conserved volume inside closed surfaces, the rate of energy pumping, and energy dissipation. The effective temperature in our Gibbs distribution goes to zero as $\mbox{Re}^{-\frac{1}{3}}$ with Reynolds number in the turbulent limit. \textbf{The Gibbs statistics in this limit reduces to the solvable string theory in two dimensions (so-called $c=1$ critical matrix model)}. This opens the way for non-perturbative calculations in the Vortex Sheet Turbulence, some of which we report here.
description: 53 pages, 8 figures, AIP format. Completely revised and extended. Now we establish equivalence in the scaling region to the solvable 2D string theory and relation to the KSL domain walls observed in liquid Helium. Fixed typos, added rotation matrix formula
Black-box inhomogeneous preconditioning for self-consistent field iterations in density functional theory
Creators: name: Herbst, Michael F.
name: Levitt, Antoine
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computational Physics (physics.comp-ph)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Numerical Analysis (math.NA)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We propose a new preconditioner based on the local density of states for computing the self-consistent problem in Kohn-Sham density functional theory. This preconditioner is inexpensive and able to cure the long-range charge sloshing known to hamper convergence in large, inhomogeneous systems such as clusters and surfaces. It is based on a parameter-free and physically motivated approximation to the independent-particle susceptibility operator, appropriate for both metals and insulators. It can be extended to semiconductors by using the macroscopic electronic dielectric constant as a parameter in the model. We test our preconditioner successfully on inhomogeneous systems containing metals, insulators, semiconductors and vacuum.
Projectors on invariant subspaces of representations $\operatorname{ad}^{\otimes 2}$ of Lie algebras $so(N)$ and $sp(2r)$ and Vogel parametrization
Creators: name: Isaev, A. P.
name: Provorov, A. A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mathematical Physics (math-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Explicit formulae for the projectors onto invariant subspaces of the $\operatorname{ad}^{\otimes 2}$ representation of the Lie algebras $so(N)$ and $sp(2r)$ have been found by means of the split Casimir operator. These projectors have also been considered from the viewpoint of the universal complex simple Lie algebra description by using the Vogel parametrisation.
description: references added
Text: History of Sinangoé
Creators: name: Quenamá, Victor
name: Dabkowski, Maksymilian
name: Aguinda, Shen
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2021
Subjects: subject: con

description: Sinangoé territory. In the past, all of it belonged to the Cofán, but now they are surrounded by other indigenous people (Kichwa and Shoara) who came to rob their land.
Proton elastic scattering from tin isotopes at 295 MeV and systematic change of neutron density distributions
Creators: name: Terashima, S.
name: Sakaguchi, H.
name: Takeda, H.
name: Ishikawa, T.
name: Itoh, M.
name: Kawabata, T.
name: Murakami, T.
name: Uchida, M.
name: Yasuda, Y.
name: Yosoi, M.
name: Zenihiro, J.
name: Yoshida, H. P.
name: Noro, T.
name: Ishida, T.
name: Asaji, S.
name: Yonemura, T.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: Cross sections and analyzing powers for proton elastic scattering from $^{116,118,120,122,124}$Sn at 295 MeV have been measured for a momentum transfer of up to about 3.5 fm$^{-1}$ to deduce systematic changes of the neutron density distribution. We tuned the relativistic Love-Franey interaction to explain the proton elastic scattering of a nucleus whose density distribution is well known. Then, we applied this interaction to deduce the neutron density distributions of tin isotopes. The result of our analysis shows the clear systematic behavior of a gradual increase in the neutron skin thickness of tin isotopes with mass number.
description: 24 pages, 12 figures. Accepted for publication in Physical Review C
My Team Will Go On: Differentiating High and Low Viability Teams through Team Interaction
Creators: name: Cao, Hancheng
name: Yang, Vivian
name: Chen, Victor
name: Lee, Yu Jin
name: Stone, Lydia
name: Diarrassouba, N'godjigui Junior
name: Whiting, Mark E.
name: Bernstein, Michael S.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computers and Society (cs.CY)
subject: Computation and Language (cs.CL)
subject: FOS: Computer and information sciences

description: Understanding team viability -- a team's capacity for sustained and future success -- is essential for building effective teams. In this study, we aggregate features drawn from the organizational behavior literature to train a viability classification model over a dataset of 669 10-minute text conversations of online teams. We train classifiers to identify teams at the top decile (most viable teams), 50th percentile (above a median split), and bottom decile (least viable teams), then characterize the attributes of teams at each of these viability levels. We find that a lasso regression model achieves an accuracy of .74--.92 AUC ROC under different thresholds of classifying viability scores. From these models, we identify the use of exclusive language such as `but' and `except', and the use of second person pronouns, as the most predictive features for detecting the most viable teams, suggesting that active engagement with others' ideas is a crucial signal of a viable team. Only a small fraction of the 10-minute discussion, as little as 70 seconds, is required for predicting the viability of team interaction. This work suggests opportunities for teams to assess, track, and visualize their own viability in real time as they collaborate.
description: CSCW 2020 Honorable Mention Award
Many-spin effects in inelastic neutron scattering and electron paramagnetic resonance of molecular nanomagnets
Creators: name: Waldmann, O.
name: Güdel, H. U.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Many molecular magnetic clusters, such as single-molecule magnets, are characterized by spin ground states with defined total spin S exhibiting zero-field-splittings. In this work, the spectroscopic intensities of the transitions within the ground-state multiplet are analyzed. In particular, the effects of a mixing with higher-lying spin multiplets, which is produced by anisotropic interactions and is neglected in the standard single-spin description, are investigated systematically for the two experimental techniques of inelastic neutron scattering (INS) and electron paramagnetic resonance (EPR), with emphasis on the former technique. The spectroscopic transition intensities are calculated analytically by constructing corresponding effective spin operators perturbationally up to second order and consequently using irreducible tensor operator techniques. Three main effects of spin mixing are observed. Firstly, a pronounced dependence of the INS intensities on the momentum transfer Q, with a typical oscillatory behavior, emerges in first order, signaling the many-spin nature of the wave functions in exchange-coupled clusters. Secondly, as compared to the results of a first-order calculation, the intensities of the transitions within the spin multiplet are affected differently by spin mixing. This allows one, thirdly, to differentiate the higher-order contributions to the cluster magnetic anisotropy which come from the single-ion ligand-field terms and spin mixing, respectively. The analytical results are illustrated by means of the three examples of an antiferromagnetic heteronuclear dimer, the Mn-[3 x 3] grid molecule, and the single-molecule magnet Mn12.
description: 18 pages, 3 figures, REVTEX4, to appear in PRB
title: Flow-induced oscillations in floating offshore wind turbines
Creators: name: Carlson, Daniel
Publisher: name: University of Massachusetts Amherst
Year: 2019

description: The goal of this thesis is to experimentally study the structural dynamics, wake interaction, and fluid forces on the multiple-degree of freedom systems typical of floating wind turbines. Vortex--surface alignment about flexibly-mounted prisms is studied to investigate the response of barges and semi-submersible hulls, and new results pertaining to the galloping response kink for a prism with dual inline--crossflow resonance is presented. Flow--induced oscillations of a spar model free to rotate in 3D space is replicated and observed as 2D figure--eight orbits about the center of the spar. Methods to suppress the flow from exciting the spar are proposed. The influence of mooring cable concavity is studied for a cylinder with crossflow--inline flexibility, and the effect of the axial tip on higher harmonic fluid forces is shown to have a significant reduction on the inline and crossflow oscillation components when concave. As a separate project, flow-induced oscillations are made beneficial to the operation of wind turbines via the study of larynx phonation to create an air-driven ultrasound generator for use as a bat deterrent on wind turbine blades.
Distinguishing AGN from starbursts as the origin of double peaked Lyman-Alpha Emitters in the reionization era
Creators: name: Padmanabhan, Hamsa
name: Loeb, Abraham
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We discuss the possible origin of the double-peaked profiles recently observed in Lyman-Alpha Emitters (LAEs) at the epoch of reionization ($z \gtrsim 6.5$) from obscured active galactic nuclei (AGN). Combining the extent of the Lyman-$α$ near-zones estimated from the blue peak velocity offset in these galaxies, with the ionizing emissivity of quasars at $z \gtrsim 6$, we forecast the intrinsic UV and X-ray luminosities of the AGN needed to give rise to their double-peaked profiles. We also estimate the extent of the obscuration of the AGN by comparing their luminosities to those of similar quasar samples at these epochs. Future X-ray and radio observations, as well as those with the ${James \ Webb \ Space \ Telescope}$, will be valuable tools to test the AGN contribution to the intergalactic-scale ionization zones of high-redshift LAEs.
description: 4 pages, 1 figure; accepted for publication in A&A Letters
Torrance, Thomas F.: Theological dialogue between orthodox and reformed churches
Creators: name: Heron, Alasdair I. C.
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 36 Nr. 1 (1987): Ökumenische Rundschau, Band 36, Heft 1
Probing the CGM of Low-redshift Dwarf Galaxies Using FIRE Simulations
Creators: name: Li, Fei
name: Rahman, Mubdi
name: Murray, Norman
name: Hafen, Zachary
name: Faucher-Giguère, Claude-André
name: Stern, Jonathan
name: Hummels, Cameron B.
name: Hopkins, Philip F.
name: El-Badry, Kareem
name: Kereš, Dušan
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Observations of UV metal absorption lines have provided insight into the structure and composition of the circumgalactic medium (CGM) around galaxies. We compare these observations with the low-redshift ($z \leq 0.3$) CGM around dwarf galaxies in high-resolution cosmological zoom-in runs in the FIRE-2 simulation suite. We select simulated galaxies that match the halo mass, stellar mass, and redshift of the observed samples. We produce absorption measurements using Trident for UV transitions of C IV, O VI, Mg II and Si III. The FIRE equivalent width (EW) distributions and covering fractions for the C IV ion are broadly consistent with observations inside $0.5 R_{vir}$, but are under-predicted for O VI, Mg II, and Si III. The absorption strengths of the ions in the CGM are moderately correlated with the masses and star formation activity of the galaxies. The correlation strengths increase with the ionization potential of the ions. The structure and composition of the gas from the simulations exhibit three zones around dwarf galaxies characterized by distinct ion column densities: the disky ISM, the inner CGM (the wind-dominated regime), and the outer CGM (the IGM accretion-dominated regime). We find that the outer CGM in the simulations is nearly but not quite supported by thermal pressure, so it is not in hydrostatic equilibrium (HSE), resulting in halo-scale bulk inflow and outflow motions. The net gas inflow rates are comparable to the SFR of the galaxy, but the bulk inflow and outflow rates are greater by an order of magnitude, with velocities comparable to the virial velocity of the halo. These roughly virial velocities (${\sim} 100 km s^{-1}$) produce large EWs in the simulations. This supports a picture for dwarf galaxies in which the dynamics of the CGM at large scales are coupled to the small-scale star formation activity near the centre of their halos.
description: To appear in MNRAS
The circular $k$-partite crossing number of $K_{m,n}$
Creators: name: Riskin, Adrian
Publisher: name: arXiv
Year: 2006
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 05C10

description: We define a new kind of crossing number which generalizes both the bipartite crossing number and the outerplanar crossing number. We calculate exact values of this crossing number for many complete bipartite graphs and also give a lower bound.
Partly noiseless encoding of quantum information in quantum dot arrays against phonon-induced pure dephasing
Creators: name: Grodecka, A.
name: Machnikowski, P.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We show that pure dephasing of a quantum dot charge (excitonic) qubit may be reduced for sufficiently slow gating by collectively encoding quantum information in an array of quantum dots. We study the role of the size and structure of the array and of the exciton lifetime for the resulting total error of a single-qubit operation.
description: Final version; 10 pages, 8 figures
Kaluza-Klein Spectrometry from Exceptional Field Theory
Creators: name: Malek, Emanuel
name: Samtleben, Henning
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Exceptional field theories yield duality-covariant formulations of higher-dimensional supergravity. They have proven to be an efficient tool for the construction of consistent truncations around various background geometries. In this paper, we demonstrate how the formalism can moreover be turned into a powerful tool for computing the Kaluza-Klein mass spectra around these backgrounds. Most of these geometries have little to no remaining symmetries and their spectra are accessible to standard methods only in selected subsectors. The present formalism not only grants access to the full Kaluza-Klein spectra but also provides the scheme to identify the resulting mass eigenstates in higher dimensions. As a first illustration, we rederive in compact form the mass spectrum of IIB supergravity on $S^5$. We further discuss the application of our formalism to determine the mass spectra of higher Kaluza-Klein multiplets around the warped geometries corresponding to some prominent ${\cal N}=2$ and ${\cal N}=0$ AdS vacua in maximal supergravity.
description: 45 pages; v2: published version with minor typos corrected
Deep Generative Models of Gravitational Waveforms via Conditional Autoencoder
Creators: name: Liao, Chung-Hao
name: Lin, Feng-Li
Publisher: name: arXiv
Year: 2021
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We construct few deep generative models of gravitational waveforms based on the semi-supervising scheme of conditional autoencoders and their variational extensions. Once the training is done, we find that our best waveform model can generate the inspiral-merger waveforms of binary black hole coalescence with more than $97\%$ average overlap matched filtering accuracy for the mass ratio between $1$ and $10$. Besides, the generation time of a single waveform takes about one millisecond, which is about $10$ to $100$ times faster than the EOBNR algorithm running on the same computing facility. Moreover, these models can also help to explore the space of waveforms. That is, with mainly the low-mass-ratio training set, the resultant trained model is capable of generating large amount of accurate high-mass-ratio waveforms. This result implies that our generative model can speed up the waveform generation for the low latency search of gravitational wave events. With the improvement of the accuracy in future work, the generative waveform model may also help to speed up the parameter estimation and can assist the numerical relativity in generating the waveforms of higher mass ratio by progressively self-training.
description: 12 pages, 16 figures; v2 use overlap match to estimate accuracy but key conclusion does not change, emphasis more on autoencoder without variational latent layer; v3 match the published version
Quantum kinetic theory for spin-1/2 fermions in Wigner function formalism
Creators: name: Gao, Jian-Hua
name: Liang, Zuo-Tang
name: Wang, Qun
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We give a brief overview of the kinetic theory for spin-1/2 fermions in Wigner function formulism. The chiral and spin kinetic equations can be derived from equations for Wigner functions. A general Wigner function has 16 components which satisfy 32 coupled equations. For massless fermions, the number of independent equations can be significantly reduced due to the decoupling of left-handed and right-handed particles. It can be proved that out of many components of Wigner functions and their coupled equations, only one kinetic equation for the distribution function is independent. This is called the disentanglement theorem for Wigner functions of chiral fermions. For massive fermions, it turns out that one particle distribution function and three spin distribution functions are independent and satisfy four kinetic equations. Various chiral and spin effects such as chiral magnetic and votical effects, the chiral seperation effect, spin polarization effects can be consistently described in the formalism.
description: 32pages, no figures, published version in IJMPA, more references are added
The histories of Raphael Samuel : a portrait of a people's historian
Creators: name: Scott-Brown, Sophie
Publisher: name: The Australian National University
Year: 2015
Subjects: subject: 907.202
subject: D15.S268 S36 2017
subject: Samuel, Raphael
subject: Historians BiographyGreat Britain
subject: Marxian historiography
subject: Historical materialism
subject: Social history

description: Most historians become known for advancing a particular historical argument or for pioneering a distinctive methodology. The British historian Raphael Samuel (1934-1996) is remarkable, however, for the way he practised history. Samuel was the moving force behind a movement, the History Workshop, which took its initial stance on the democratisation of history making, becoming synonymous with vivid histories of working-class life and culture. Later, Samuel became a founding editor of a periodical, the History Workshop Journal (1976-). He was best known as a public intellectual, being a prominent voice in the British history wars of the mid-1980s. The author of over a dozen monographs, his best known work is Theatres of Memory (1994), a pioneering book exploring the relationship between social memory and public history which was described "as a compendium of enthusiasms". This is the first concentrated biographical account of Samuel's thought and practice. It offers a sustained and rigorous engagement with Samuel's political philosophy and contribution as a post-war public intellectual. Practice was always equally important as theory to Samuel. He has to be judged as much as by what he did as what he wrote. I argue that, in this sense, Samuel was a communist rather than a Marxist historian. Rather than being the last comrade of the old New Left: populist, romantic and sentimental, he was distinctive from the start, later falling back upon his communist childhood and his skills as an organiser and facilitator after he broke with the party and subsequently with Marxism. Drawing on a close reading of his texts and activities for their performative qualities in conjunction with previously unpublished material from the Raphael Samuel Archive at the Bishopsgate Institute, London, and a range of oral interviews with his contemporaries, this thesis reconstructs Samuel's intellectual and political development. As a critical biography, it stresses his achievement as an instigator and enabler of history making. Samuel used history as a form of social critique, accommodating plurality in history. As an individual, he presents a stark challenge to the ways in which we conceive of the social role of the historian, making a distinct shift from the historian as an authority about the past to the historian as a facilitator of history making.
Lexis triangles in Japan for the years 1951-2021: an alternative to individual lifetimes
Creators: name: Robine, Jean-Marie
name: Saito, Yasuhiko
Publisher: name: Zenodo
Year: 2024

description: Since the early 2000s, 13 countries have participated in the International Longevity Database(ILD), with research teams collecting and validating data on people who survive or die at theage of 105 or over. Over the years, however, the number of countries continuing to providedata has gradually declined in parallel with the rise of laws or regulations concerning theprotection of individual privacy and data.

In Japan, for example, the Ministry of Health, Labour and Welfare (MHLW), which haspublished a list of centenarians every year for the On Respect of the Aged Day since 1963,stopped doing so in 2007, depriving researchers of the only list of Japanese centenarians byname. However, with 90,526 centenarians counted in September 2022 and a total of 35,005deaths at age 105 and over recorded between 1951 and 2021 (1,179 cumulative deaths atage 110 and over during the same period), Japan should be the biggest contributor to IDL.Under these conditions, we would like to explore the possibility of supplementing the IDLindividual lifetimes database with statistical data distributed by sex, by completed age atdeath, by year of birth (cohort), and by year of death; what demographers call Lexis triangles,without any censoring of age at death. Such data exists in Japan and has been publiclyavailable since 1899, although there are a few years when the data does not exist or is simplydistributed by completed age. The quality of these data deserves to be questioned,particularly before the Second World War and before 1963, the year in which the MHLWbegan to publish the nominal list of centenarians. In this presentation, we focus on the years1951-2021, when the Lexis triangles were available without interruption.
Redshifted 21-cm bispectrum II: Impact of the spin temperature fluctuations and redshift space distortions on the signal from the Cosmic Dawn
Creators: name: Kamran, Mohd
name: Ghara, Raghunath
name: Majumdar, Suman
name: Mondal, Rajesh
name: Mellema, Garrelt
name: Bharadwaj, Somnath
name: Pritchard, Jonathan R.
name: Iliev, Ilian T.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We present a study of the 21-cm signal bispectrum (which quantifies the non-Gaussianity in the signal) from the Cosmic Dawn (CD). For our analysis, we have simulated the 21-cm signal using radiative transfer code GRIZZLY, while considering two types of sources (mini-QSOs and HMXBs) for Ly$α$ coupling and the X-ray heating of the IGM. Using this simulated signal, we have, for the first time, estimated the CD 21-cm bispectra for all unique $k$-triangles and for a range of $k$ modes. We observe that the redshift evolution of the bispectra magnitude and sign follow a generic trend for both source models. However, the redshifts at which the bispectra magnitude reach their maximum and minimum values and show their sign reversal depends on the source model. When the Ly$α$ coupling and the X-ray heating of the IGM occur simultaneously, we observe two consecutive sign reversals in the bispectra for small $k$-triangles (irrespective of the source models). One arising at the beginning of the IGM heating and the other at the end of Ly$α$ coupling saturation. This feature can be used in principle to constrain the CD history and/or to identify the specific CD scenarios. We also quantify the impact of the spin temperature ($T_{\rm S}$) fluctuations on the bispectra. We find that $T_{\rm S}$ fluctuations have maximum impact on the bispectra magnitude for small $k$-triangles and at the stage when Ly$α$ coupling reaches saturation. Furthermore, we are also the first to quantify the impact of redshift space distortions (RSD), on the CD bispectra. We find that the impact of RSD on the CD 21-cm bispectra is significant ($> 20\%$) and the level depends on the stages of the CD and the $k$-triangles for which the bispectra are being estimated.
description: 15 pages, 9 figures. Accepted for publication in the MNRAS. Replaced to match the accepted version
Iterative noncoherent detection of differentially encoded m-psk
Creators: name: Marsland, Ian D.
Publisher: name: University of British Columbia
Year: 2009

description: The combination of convolutional encoding, interleaving and differentially encoded Mary phase shift keying (M-PSK) forms an attractive transmission scheme because it combines the benefits of error correction with the simplicity of noncoherent detection. The use of an interleaver, which rearranges the bits of the code word prior to modulation, has the potential to greatly enhance the error correcting ability of the code, provided a suitable decoder structure is used. In this thesis an iterative decoder structure, similar to the one used for decoding "turbo" codes, is proposed for use with this transmission scheme. The resulting technique, named iterative noncoherent detection, is applied to three difi^erent, well-known channel models; namely, the additive white Gaussian noise channel, the Rayleigh frequencyflat fading channel, and the Rayleigh frequency-selective fading channel. For each channel model novel soft-output decoders are derived, and the system performance, in terms of the bit error rate, is investigated by means of computer simulation. In all three applications, the proposed system works very well, not only providing performance that is significantly better than traditional non-iterative techniques, but also much better than anticipated.
Epigenetic control of behavioural plasticity in the honey bee
Creators: name: Lockett, Gabrielle
Publisher: name: The Australian National University
Year: 2010
Subjects: subject: QL568.A6 L63 2010
subject: Honeybee Behavior Genetic aspects
subject: Epigenetics
subject: Neuroplasticity

description: A remarkable capacity of animals is to respond in a highly plastic manner to the world around them. For a long time it was largely unknown what within the cell drives the creation and persistence of these plastic responses. Epigenetic processes such as DNA methylation and histone acetylation could be part of the story, as these marks on the genome are reversible but can also be highly stable. Some insects exhibit dramatic phenotypic plasticity, a seminal illustration of which is the epigenetic control of plasticity in the developmental trajectories of female honey bee larvae (Kucharski et aI., 2008). While epigenetics is certainly not the whole story, epigenetic processes contribute to neural plasticity, behavioural plasticity and germline plasticity responses to environmental stimuli. The honey bee has retained a vertebrate-style DNA methylation system, though methylation has been lost in some insects - could this extra level of regulatory control permit the flexibility and memory capability required by honey bees in their social interactions, development and enhanced cognitive facilities? The discovery that the de novo DNA methyltransferase Dnmt3 is highly expressed not only during development but also in drone genitalia and worker brains (Wang et aI., 2006) hints at additional epigenetic functions in the honey bee. What specific situations requiring plasticity might epigenetic processes mediate in this model invertebrate? Behavioural memory is a complex multilevel phenomenon which is not fully understood -are epigenetic processes involved in memory in the honey bee? Can flexibility at the epigenomic level also underpin the remarkable physiological and behavioural plasticity in task progression? Can plastic responses to potent environmental stimuli be transmitted to the next generation? Here I present evidence for the role of epigenetic mechanisms in the neural plasticity involved in memory formation, the dramatic physiological changes accompanying the progression from in-hive tasks to foraging, and male germline effects of a potent environmental stimulus. The research presented in this thesis demonstrates the striking involvement of epigenetic processes in controlling plasticity in the honey bee, showing that organismal outcomes are not hardwired in the genome.
Generalized kinetic and evolution equations in the approach of the nonequilibrium statistical operator
Creators: name: Kuzemsky, A. L.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The method of the nonequilibrium statistical operator developed by D. N. Zubarev is employed to analyse and derive generalized transport and kinetic equations. The degrees of freedom in solids can often be represented as a few interacting subsystems (electrons, spins, phonons, nuclear spins, etc.). Perturbation of one subsystem may produce a nonequilibrium state which is then relaxed to an equilibrium state due to the interaction between particles or with a thermal bath. The generalized kinetic equations were derived for a system weakly coupled to a thermal bath to elucidate the nature of transport and relaxation processes. It was shown that the "collision term" had the same functional form as for the generalized kinetic equations for the system with small interactions among particles. The applicability of the general formalism to physically relevant situations is investigated. It is shown that some known generalized kinetic equations (e.g. kinetic equation for magnons, Peierls equation for phonons) naturally emerges within the NSO formalism. The relaxation of a small dynamic subsystem in contact with a thermal bath is considered on the basis of the derived equations. The Schrodinger-type equation for the average amplitude describing the energy shift and damping of a particle in a thermal bath and the coupled kinetic equation describing the dynamic and statistical aspects of the motion are derived and analysed. The equations derived can help in the understanding of the origin of irreversible behavior in quantum phenomena.
description: 21 pages, Revtex
Schillebeeckx, Edward: Christliche Identität und kirchliches Amt
Creators: name: Schäfer, Rolf
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 36 Nr. 1 (1987): Ökumenische Rundschau, Band 36, Heft 1
Text: Story of Ufendyu'chu
Creators: name: Umenda Shigirango, Rosalina
name: Dabkowski, Maksymilian
name: Aguinda, Shen
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2021
Subjects: subject: con

description: A single mother had five children, but her husband was a Kuankuan. The children cut his penis off. The mother abandoned her children. The children decided to go to the sky and they threw sticks at the sky. The smallest one could throw sticks the highest and a staircase descended from the sky and they climbed it.
Dimensional Control of Antilocalisation and Spin Relaxation in Quantum Wires
Creators: name: Kettemann, S.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: The spin relaxation rate $1/τ_s (W)$ in disordered quantum wires with Rashba and Dresselhaus spin-orbit coupling is derived analytically as a function of wire width $W$. It is found to be diminished when $W$ is smaller than the bulk spin-orbit length $L_{\rm SO}$. Only a small spin relaxation rate due to cubic Dresselhaus coupling $γ$ is found to remain in this limit. As a result, when reducing the wire width $W$ the quantum conductivity correction changes from weak anti- to weak localization and from negative to positive magnetoconductivity.
description: 4.0 pages, 3 figures, final version, Refs. updated, introduction and formula for spin relaxation rate added