cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Edge rings with $q$-linear resolutions
Creators: name: Mori, Kenta
name: Ohsugi, Hidefumi
name: Tsuchiya, Akiyoshi
Publisher: name: arXiv
Year: 2020
Subjects: subject: Commutative Algebra (math.AC)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 05E40, 13H10, 52B20

description: In the present paper, we give a complete classification of connected simple graphs whose edge rings have a $q$-linear resolution with $q \geq 2$. In particular, we show that the edge ring of a finite connected simple graph with a $q$-linear resolution, where $q \geq 3$, is a hypersurface, which was conjectured by Hibi, Matsuda, and Tsuchiya.
description: 18 pages, 7 figures
title: Vom Lächeln der Henker im Ersten Weltkrieg. Das Buch von Anton Holzer über den unbekannten Krieg gegen die Zivilbevölkerung - in zweiter Auflage erschienen
Creators: name: Bartlitz, Christine
Publisher: name: ZZF - Centre for Contemporary History: Visual History
Year: 2014

description: „Ach, dieses Lächeln im Krieg war erschütternder als das Weinen“, schrieb Karl Kraus in „Die letzten Tage der Menschheit“. Und das Lächeln des Wiener Henkers nach der Hinrichtung des italienischen Patrioten Cesare Battisti im Jahr 1916 ist wahrhaft erschütternd. Heiter, als wären sie beim Heurigen, posieren der Henker und seine Assistenten vor der Kamera. Erst auf den zweiten Blick erfasst das Auge den erhängten Mann in ihrer Mitte, der an dem Pfahl wie eine Gliederpuppe wirkt – als Trophäe gehalten vom stolzen Henker, der mit seinen Händen den Besitz anzeigt. Anton Holzer hat dieses Foto für den Umschlag seines Buchs „Das Lächeln der Henker. Der unbekannte Krieg gegen die Zivilbevölkerung“ gewählt, das 2014 als Sonderausgabe zum 100. Jahrestag des Ersten Weltkriegs in zweiter Auflage erschienen ist. Es reiht sich in eine lange Reihe von Bildern ein, mit denen Holzer die Gewalt gegen die Zivilbevölkerung im Ersten Weltkrieg im Osten dokumentiert.
Properties of the Michaelis-Menten Mechanism in Phase Space
Creators: name: Calder, Matt S.
name: Siegel, David
Publisher: name: arXiv
Year: 2006
Subjects: subject: Dynamical Systems (math.DS)
subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Mathematics
subject: 92C45 (Primary) 34C05, 34E05 (Secondary)

description: We study the two-dimensional reduction of the Michaelis-Menten reaction of enzyme kinetics. First, we prove the existence and uniqueness of a slow manifold between the horizontal and vertical isoclines. Second, we determine the concavity of all solutions in the first quadrant. Third, we establish the asymptotic behaviour of all solutions near the origin, which generally is not given by a Taylor series. Finally, we determine the asymptotic behaviour of the slow manifold at infinity.
description: 29 pages, 8 figures, corrected a few typos and incorporated reviewer suggestions
Enabling MPI communication within Numba/LLVM JIT-compiled Python code using numba-mpi v1.0
Creators: name: Derlatka, Kacper
name: Manna, Maciej
name: Bulenok, Oleksii
name: Zwicker, David
name: Arabas, Sylwester
Publisher: name: arXiv
Year: 2024
Subjects: subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: Mathematical Software (cs.MS)
subject: FOS: Computer and information sciences

description: The numba-mpi package offers access to the Message Passing Interface (MPI) routines from Python code that uses the Numba just-in-time (JIT) compiler. As a result, high-performance and multi-threaded Python code may utilize MPI communication facilities without leaving the JIT-compiled code blocks, which is not possible with the mpi4py package, a higher-level Python interface to MPI. For debugging purposes, numba-mpi retains full functionality of the code even if the JIT compilation is disabled. The numba-mpi API constitutes a thin wrapper around the C API of MPI and is built around Numpy arrays including handling of non-contiguous views over array slices. Project development is hosted at GitHub leveraging the mpi4py/setup-mpi workflow enabling continuous integration tests on Linux (MPICH, OpenMPI & Intel MPI), macOS (MPICH & OpenMPI) and Windows (MS MPI). The paper covers an overview of the package features, architecture and performance. As of v1.0, the following MPI routines are exposed and covered by unit tests: size/rank, [i]send/[i]recv, wait[all|any], test[all|any], allreduce, bcast, barrier, scatter/[all]gather & wtime. The package is implemented in pure Python and depends on numpy, numba and mpi4py (the latter used at initialization and as a source of utility routines only). The performance advantage of using numba-mpi compared to mpi4py is depicted with a simple example, with entirety of the code included in listings discussed in the text. Application of numba-mpi for handling domain decomposition in numerical solvers for partial differential equations is presented using two external packages that depend on numba-mpi: py-pde and PyMPDATA-MPI.
กฎหมายปฏิรูปที่ดินเพื่อเกษตรกรรมกับข้อท้าทายที่เปลี่ยนไป
Creators: name: ดามร คำไตรย์
Publisher: name: คณะนิติศาสตร์ มหาวิทยาลัยเชียงใหม่
Year: 2558
Subjects: การปฏิรูปที่ดิน, เกษตรกรรม, กฎหมาย, ข้อท้าทาย, ประเทศไทย

description: 1, 8, วารสารนิติสังคมศาสตร์
Improved Prediction of Settling Behaviour of Solid Particles through Machine Learning Analysis of Experimental Retention Time Data
Creators: name: Keren, Liron Simon
name: Lazebnik, Teddy
name: Liberzon, Alex
Publisher: name: arXiv
Year: 2023
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: The motion of particles through density-stratified interfaces is a common phenomenon in environmental and engineering applications. However, the mechanics of particle-stratification interactions in various combinations of particle and fluid properties are not well understood. This study presents a novel machine-learning (ML) approach to experimental data of inertial particles crossing a density-stratified interface. A simplified particle settling experiment was conducted to obtain a large number of particles and expand the parameter range, resulting in an unprecedented data set that has been shared as open data. Using ML, the study explores new correlations that collapse the data from this, and previous work Verso et al. (2019). The ``delay time,'' which is the time between the particle exiting the interfacial layer and reaching a steady-state velocity, is found to strongly depend on six dimensionless parameters formulated by ML feature selection. The data shows a correlation between the Reynolds and Froude numbers within the range of the experiments, and the best symbolic regression is based on the Froude number only. This experiment provides valuable insights into the behavior of inertial particles in stratified layers and highlights opportunities for future improvement in predicting their motion.
Reserves of ability in Australian male youth : an exploratory study
Creators: name: Milligan, Bruce Clifford
Publisher: name: Canberra, ACT : The Australian National University
Year: 1973
Subjects: subject: Education Australia
subject: Education, Secondary Australia
subject: Educational equalization Australia

description: This thesis is centred on an empirical study of reserves of ability among Australian male youth , using a technique adapted from the European research of Wolff and Harnqvist . The study is pitched at the level of the senior years of secondary schooling . A cross- sectional vi design is involved , the data being based on a sample of National Servicemen enlisted in the calendar year 1971 . The study is conceptualised within the issue of equality of educational opportunity . The main empirical focus is on the relationship between measures of social class , intellectual ability and educational attainment . The principal point of departure in the method of estimating reserves of ability is the use of the benchmark assumption that children of the higher social classes receive all the education that their abilities , interests and temperaments allow . This assumption has the effect of confining the discovery of reserves to the ranks of the lower social classes . The study investigates the extent of matriculation reserves among lower social class members of the sample . Estimates of reserves in the entire twenty- year- old male age group are then projected . Using the ratio of male to female senior secondary school enrolments , estimates are also made of the number of reserves in the corresponding female age group , and in the population age group as a whole . These generalisations are subject to limitations arising from problems of sampling and measurement and the study is regared as being essentially an exploratory one . Some implications of the approach used in the study for the mobilisation of reserves are discussed .
พรมแดนความรู้ของการศึกษากฎหมายแนวนิติสำนึกในสังคมไทย
Creators: name: สมชาย ปรีชาศิลปกุล
Publisher: name: คณะนิติศาสตร์ มหาวิทยาลัยเชียงใหม่
Year: 2558

description: 1, 8, วารสารนิติสังคมศาสตร์
Cubic phase gates are not suitable for non-Clifford operations on GKP states
Creators: name: Hastrup, Jacob
name: Larsen, Mikkel V.
name: Neergaard-Nielsen, Jonas S.
name: Menicucci, Nicolas C.
name: Andersen, Ulrik L.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: With the Gottesman-Kitaev-Preskill (GKP) encoding, Clifford gates and error correction can be carried out using simple Gaussian operations. Still, non-Clifford gates, required for universality, require non-Gaussian elements. In their original proposal, GKP suggested a particularly simple method of using a single application of the cubic phase gate to perform the logical non-Clifford T-gate. Here we show that this cubic phase gate approach performs extraordinarily poorly, even for arbitrarily large amounts of squeezing in the GKP state. Thus, contrary to common belief, the cubic phase gate is not suitable for achieving universal fault-tolerant quantum computation with GKP states.
description: 7 pages, 3 figures, corrected typos
Global defensive k-alliances in graphs
Creators: name: Rodriguez, J. A.
name: Sigarreta, J. M.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 05C69, 05A20

description: Let $Γ=(V,E)$ be a simple graph. For a nonempty set $X\subseteq V$, and a vertex $v\in V$, $δ_{X}(v)$ denotes the number of neighbors $v$ has in $X$. A nonempty set $S\subseteq V$ is a \emph{defensive $k$-alliance} in $Γ=(V,E)$ if $δ_S(v)\ge δ_{\bar{S}}(v)+k,$ $\forall v\in S.$ A defensive $k$-alliance $S$ is called \emph{global} if it forms a dominating set. The \emph{global defensive $k$-alliance number} of $Γ$, denoted by $γ_{k}^{a}(Γ)$, is the minimum cardinality of a defensive $k$-alliance in $Γ$. We study the mathematical properties of $γ_{k}^{a}(Γ)$.
Facetotecta Grygier 1985
Creators: name: Olesen, Jørgen
name: Grygier, Mark J.
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Malacostraca

description: Relative abundance and constancy of LSN morphospecies of Facetotecta at Sesoko Island in 2018 and 2019
Because the youngest and most common naupliar stages caught in plankton frequently cannot be directly tied to the corresponding LSN and cyprid stages, direct assessments of the relative abundance of different y-larval morphospecies in plankton samples, based on all naupliar stages present, cannot be done. In consequence, the following results concerning relative abundance are based solely on the 420 lecithotrophic individuals that were reared to their LSN and videographed at Sesoko Island in 2018/2019.
The relative abundance of lecithotrophic morphospecies (LSN ‘Types’ and cyprids) is presented visually in a bar chart (Fig. 20). A weak negative correlation (-0.35075) was found between the number of last-stage nauplii and their size (Table 1; cf. the same-scale photos of all morphospecies in Fig. 20). Since only about 8% of reared individuals survived to the LSN stage and the identity of the failed individuals was largely unknown and not recorded, the proportions of morphospecies among these LSNs may be different from their proportions in the plankton. Nonetheless, overall, the relative abundance of different y-naupliar forms followed the same pattern in 2018 and 2019 (Table 1), with 22 of 30 morphospecies (73%) occurring in both years. The nine most abundant morphospecies overall (Types O*, E*, C, D*, AH*, AG*, K, G, N*) were, with a few exceptions, the most common ones in both years. Notable exceptions were Type K (only one specimen in 2019) and Types G and N* (few specimens in 2018 and 2019, respectively). Conversely, the same set of low-abundance morphospecies was found in both years. There was a smaller overlap in occurrence between 2018/2019 and the earlier more sporadic collections from 1991 to 2005, involving only 18 of the total of 34 morphospecies (53%).
description: Published as part of Olesen, Jørgen & Grygier, Mark J., 2024, Taxonomic diversity of marine planktonic ' y-larvae' (Crustacea: Facetotecta) from a coral reef hotspot locality (Japan, Okinawa), with a key to y-nauplii, pp. 1-90 in European Journal of Taxonomy 929 (1) on page 55, DOI: 10.5852/ejt.2024.929.2479, http://zenodo.org/record/10876286
ความเข้าใจว่าด้วย "สิทธิชุมชน" ของนักกฎหมายไทย
Creators: name: บุญชู ณ ป้อมเพ็ชร
Publisher: name: คณะนิติศาสตร์ มหาวิทยาลัยเชียงใหม่
Year: 2558
Subjects: สิทธิชุมชน, กฎหมาย, นักกฎหมาย

description: 1, 8, วารสารนิติสังคมศาสตร์
Ecuador's electricity crisis: misinformation aggravates uncertainty
Creators: name: Suing, Abel
Publisher: name: Zenodo
Year: 2024
Subjects: subject: Communication
subject: Communication policies
subject: Crisis
subject: Politics
subject: Law
subject: FOS: Law
subject: Freedom of expression
subject: Water
subject: drought

description: Publication presented in the opinion section of the digital newspaper hora 32 https://hora32.com.ec/ published in Loja (Ecuador).
Solution of the Jacobi inversion problem on non-hyperelliptic curves
Creators: name: Bernatska, Julia
name: Leykin, Dmitry
Publisher: name: arXiv
Year: 2022
Subjects: subject: Mathematical Physics (math-ph)
subject: Algebraic Geometry (math.AG)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 30F10

description: In this paper we propose a method of solving the Jacobi inversion problem in terms of multiply periodic $\wp$ functions, also called Kleinian $\wp$ functions. This result is based on the recently developed theory of multivariable sigma functions for $(n,s)$-curves. Considering $(n,s)$-curves as canonical representatives in the corresponding classes of bi-rationally equivalent plane algebraic curves, we claim that the Jacobi inversion problem on plane algebraic curves is solved completely. Explicit solutions on trigonal, tetragonal and pentagonal curves are given as an illustration.
description: 29 pages
Circuit analysis of quantum measurement
Creators: name: Kurotani, Yuji
name: Ueda, Masahito
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We develop a circuit theory that enables us to analyze quantum measurements on a two-level system and on a continuous-variable system on an equal footing. As a measurement scheme applicable to both systems, we discuss a swapping state measurement which exchanges quantum states between the system and the measuring apparatus before the apparatus meter is read out. This swapping state measurement has an advantage in gravitational-wave detection over contractive state measurement in that the postmeasurement state of the system can be set to a prescribed one, regardless of the outcome of the measurement.
description: 11pages, 7figures
พัฒนาการของสำนึกใน "สิทธิ" จากการเคลื่อนไหวทางสังคมของนักศึกษาในภาคตะวันออกเฉียงเหนือ
Creators: name: โศภิต ชีวะพานิชย์
Publisher: name: คณะนิติศาสตร์ มหาวิทยาลัยเชียงใหม่
Year: 2558
Subjects: สิทธิ, สำนึก, การเคลื่อนไหวทางสังคม, นักศึกษา, อีสาน

description: 1, 8, วารสารนิติสังคมศาสตร์
Tuning the electronic structure of α-antimonene monolayer through interface engineering
Creators: name: Shi, Zhi-Qiang
name: Li, Huiping
name: Xue, Cheng-Long
name: Yuan, Qian-Qian
name: Lv, Yang-Yang
name: Xu, Yong-Jie
name: Jia, Zhen-Yu
name: Gao, Libo
name: Chen, Yanbin
name: Zhu, Wenguang
name: Li, Shao-Chun
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The interfacial charge transfer from the substrate may influence the electronic structure of the epitaxial van der Waals (vdW) monolayers and thus their further technological applications. For instance, the freestanding Sb monolayer in puckered honeycomb phase (α-antimonene), the structural analog of black phosphorene, was predicted to be a semiconductor, but the epitaxial one behaves as a gapless semimetal when grown on the Td-WTe2 substrate. Here, we demonstrate that interface engineering can be applied to tune the interfacial charge transfer and thus the electron band of epitaxial monolayer. As a result, the nearly freestanding (semiconducting) α-antimonene monolayer with a band gap of ~170 meV was successfully obtained on the SnSe substrate. Furthermore, a semiconductor-semimetal crossover is observed in the bilayer α-antimonene. This study paves the way towards modifying the electron structure in two-dimensional vdW materials through interface engineering.
description: 18 pages, 4 figures
ผลสะเทือนของอินเตอร์เน็ตต่อปริมณฑลทางกฎหมาย
Creators: name: ทศพล ทรรศนกุลพันธ์
Publisher: name: คณะนิติศาสตร์ มหาวิทยาลัยเชียงใหม่
Year: 2558
Subjects: อินเตอร์เน็ต, ผลกระท, เงื่อนไข, ปริมณฑลทางกฎหมาย, การกำกับควบคุม

description: 1, 8, วารสารนิติสังคมศาสตร์
Wave packet dynamics and edge transport in anomalous Floquet topological phases
Creators: name: Martínez, Miguel F.
name: Ünal, F. Nur
Publisher: name: arXiv
Year: 2023
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Atomic Physics (physics.atom-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The possibility of attaining chiral edge modes under periodic driving has spurred tremendous attention, both theoretically and experimentally, especially in light of anomalous Floquet topological phases that feature vanishing Chern numbers unlike any static counterpart. We here consider a periodically modulated honeycomb lattice and experimentally relevant driving protocols, which allows us to obtain edge modes of various character in a simple model. We calculate the phase diagram over a wide range of parameters and recover an anomalous topological phase with quasienergy gaps harbouring edge states with opposite chirality. Motivated by the advances in single-site control in optical lattices, we investigate wave packet dynamics localized at the edges in distinct Floquet topological regimes that cannot be achieved in equilibrium. We analyse transport properties in edge modes originating from the same bands, but with support at different quasienergies and sublattices as well as possessing different chiralities. We find that an anomalous Floquet topological phase can in general generate more robust chiral edge motion than a Haldane phase. Our results demonstrate that the rich interplay of wave packet dynamics and topological edge states can serve as a versatile tool in ultracold quantum gases in optical lattices.
description: 9+2 pages, 7+3 figures (Accepted version)
Weyl-Lewis-Papapetrou coordinates, self-dual Yang-Mills equations and the single copy
Creators: name: Cardoso, Gabriel Lopes
name: Mahapatra, Swapna
name: Nagy, Silvia
Publisher: name: arXiv
Year: 2024
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We consider the dimensional reduction to two dimensions of certain gravitational theories in $D \geq 4$ dimensions at the two-derivative level. It is known that the resulting field equations describe an integrable system in two dimensions which can also be obtained by a dimensional reduction of the self-dual Yang-Mills equations in four dimensions. We use this relation to construct a single copy prescription for classes of gravitational solutions in Weyl-Lewis-Papapetrou coordinates. In contrast with previous proposals, we find that the gauge group of the Yang-Mills single copy carries non-trivial information about the gravitational solution. We illustrate our single copy prescription with various examples that include the extremal Reissner-Nordstrom solution, the Kaluza-Klein rotating attractor solution, the Einstein-Rosen wave solution and the self-dual Kleinian Taub-NUT solution.
description: 54 pages; v2: references added
Seen through different eyes : changing land use and settlement patterns in the Upper Macquarie River Region of N.S.W., from prehistoric times to 1860
Creators: name: Pearson, Michael
Publisher: name: Canberra, ACT : The Australian National University
Year: 2017
Subjects: subject: Land settlement HistoryAustralia Macquarie Valley (N.S.W.)
subject: Land settlement patterns
subject: Land use HistoryAustralia Macquarie Valley (N.S.W.)
subject: Human geography Australia Macquarie Valley (N.S.W.)

description: This thesis is a study of the history of human settlement and land use in the Upper Macquarie River region of N.S.W., based on ethnhistorical literature, historical records and archaeological survey. An attempt has been made to use techniques borrowed from history, archaeology and historical geography to establish the environmental and cultural determinants of human settlement in the region. The settlement pattern and land use of the prehistoric Aboriginal culture, the early nineteenth century settlers, the squatters and the gold miners have been studied, and these have been related to environmental zoning in the region, differing economic systems, and evolving perceptions of the regional landscape. This thesis was completed and first submitted for examination in 1978. The text therefore contains no references to findings made, or literature published, after 1978.
Preparation and study of the entanglement of the Schrödinger cat state on the ibmq-melbourne quantum computer
Creators: name: Kuzmak, A. R.
name: Tkachuk, V. M.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We study the entanglement between a certain qubit and the remaining system in the Schrödinger cat state prepared on the ibmq-melbourne quantum computer. The protocol, which we use for this purpose, is based on the determination of the mean value of spin corresponding to a certain qubit. We explore the dependence of the entanglement on a parameter of the Schrödinger cat state which consists of different numbers of qubits. In addition, we explore the entanglement of each qubit with the remaining system in the maximum entangled Schrödinger cat state.
description: 8 pages, 5 figures, 1 table
Preparation of pure and mixed polarization qubits and the direct measurement of figures of merit
Creators: name: Adamson, R. B. A.
name: Shalm, L. K.
name: Steinberg, A. M.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Non-classical joint measurements can hugely improve the efficiency with which certain figures of merit of quantum systems are measured. We use such a measurement to determine a particular figure of merit, the purity, for a polarization qubit. In the process we highlight some of subtleties involved in common methods for generating decoherence in quantum optics.
description: 5 pages, 3 figures, 1 table
Measurement-based quantum computation in finite one-dimensional systems: string order implies computational power
Creators: name: Raussendorf, Robert
name: Yang, Wang
name: Adhikary, Arnab
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We present a new framework for assessing the power of measurement-based quantum computation (MBQC) on short-range entangled symmetric resource states, in spatial dimension one. It requires fewer assumptions than previously known. The formalism can handle finitely extended systems (as opposed to the thermodynamic limit), and does not require translation-invariance. Further, we strengthen the connection between MBQC computational power and string order. Namely, we establish that whenever a suitable set of string order parameters is non-zero, a corresponding set of unitary gates can be realized with fidelity arbitrarily close to unity.
description: 48 pages
Quantum pattern recognition with liquid-state nuclear magnetic resonance
Creators: name: Neigovzen, Rodion
name: Neves, Jorge L.
name: Sollacher, Rudolf
name: Glaser, Steffen J.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: A novel quantum pattern recognition scheme is presented, which combines the idea of a classic Hopfield neural network with adiabatic quantum computation. Both the input and the memorized patterns are represented by means of the problem Hamiltonian. In contrast to classic neural networks, the algorithm can return a quantum superposition of multiple recognized patterns. A proof of principle for the algorithm for two qubits is provided using a liquid state NMR quantum computer.
description: updated version, Journal-ref added
A Recurrence Method for Generalizing Known Scientific Results
Creators: name: Smarandache, Florentin
Publisher: name: arXiv
Year: 2006
Subjects: subject: General Mathematics (math.GM)
subject: FOS: Mathematics
subject: 05A20

description: A great number of articles widen a known scientific result $P(a)$ (such as: a theorem, an inequality, or a math/physics/chemical etc. proposition or formula) by a simple recurrence procedure and using, in the proof, the proposition $P(a)$ itself. We present, as examples, the generalizations of Hölder's inequality, of Minkovski's inequality, of Tchebychev's inequality, and of the Theorem of Menelaus respectively.
description: 7 pages. "G\'en\'eralisation du Th\'eor\`eme de M\'mn\'ela\"us" [Generalization of the Theorem of Menelaus] presented in Rabat, Morocco, to the Seminar for the selection and preparation of the Moroccan students for the International Olympiad of Mathematics in Paris - France, 1983.
The X-ray pulsar XTE J1858+034 observed with NuSTAR and Fermi/GBM: spectral and timing characterization plus a cyclotron line
Creators: name: Malacaria, C.
name: Kretschmar, P.
name: Madsen, K. K.
name: Wilson-Hodge, C. A.
name: Coley, Joel B.
name: Jenke, P.
name: Lutovinov, A. A.
name: Pottschmidt, K.
name: Tsygankov, S. S.
name: Wilms, J.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Accreting X-ray pulsars (XRPs) undergo luminous X-ray outbursts during which the spectral and timing behavior of the neutron star can be studied in detail. We analyze a $NuSTAR$ observation of the XRP XTE J1858+034 during its outburst in 2019. The spectrum is fit with a phenomenological, a semi-empirical and a physical spectral model. A candidate cyclotron line is found at $48\,$keV, implying a magnetic field of $5.4\times10^{\rm 12}\,$G at the site of emission. This is also supported by the physical best-fit model. We propose an orbital period of about $81$ days based on the visual inspection of the X-ray outbursts recurrence time. Based on $Fermi$ Gamma-ray Burst Monitor data, the standard disk accretion-torque theory allowed us to infer a distance of $10.9\pm1.0\,$kpc. Pulse profiles are single-peaked and show a pulsed fraction that is strongly energy-dependent at least up to $40$ keV.
description: Accepted for publication in ApJ; 9 pages, 2 tables, 7 figures
Entanglement in quenched extended Su-Schrieffer-Heeger model with anomalous dynamical quantum phase transitions
Creators: name: Wong, Cheuk Yiu
name: Hui, Tsz Hin
name: Sacramento, P. D.
name: Yu, Wing Chi
Publisher: name: arXiv
Year: 2024
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Research on topological models unveils fascinating physics, especially in the realm of dynamical quantum phase transitions (DQPTs). However, the understanding of entanglement structures and properties near DQPT in models with longer-range hoppings is far from complete. In this work, we study DQPTs in the quenched extended Su-Schrieffer-Heeger (SSH) model. Anomalous DQPTs, where the number of critical momenta exceeds the winding number differences between the pre-quench and post-quench phases, are observed. We find that the entanglement exhibits local maximum (minimum) around the anomalous DQPTs, in line with the level crossings (separations) around the middle of the correlation matrix spectrum. We further categorize the phases in the equilibrium model into two classes and distinctive features in the time evolution of the entanglement involving quenches within and across the two classes are identified. The findings pave the way to a better understanding of topological models with longer-range hoppings in the out-of-equilibrium regime.
description: 18 pages, 19 figures
Self-similarity Driven Scale-invariant Learning for Weakly Supervised Person Search
Creators: name: Wang, Benzhi
name: Yang, Yang
name: Wu, Jinlin
name: Qi, Guo-jun
name: Lei, Zhen
Publisher: name: arXiv
Year: 2023
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Weakly supervised person search aims to jointly detect and match persons with only bounding box annotations. Existing approaches typically focus on improving the features by exploring relations of persons. However, scale variation problem is a more severe obstacle and under-studied that a person often owns images with different scales (resolutions). On the one hand, small-scale images contain less information of a person, thus affecting the accuracy of the generated pseudo labels. On the other hand, the similarity of cross-scale images is often smaller than that of images with the same scale for a person, which will increase the difficulty of matching. In this paper, we address this problem by proposing a novel one-step framework, named Self-similarity driven Scale-invariant Learning (SSL). Scale invariance can be explored based on the self-similarity prior that it shows the same statistical properties of an image at different scales. To this end, we introduce a Multi-scale Exemplar Branch to guide the network in concentrating on the foreground and learning scale-invariant features by hard exemplars mining. To enhance the discriminative power of the features in an unsupervised manner, we introduce a dynamic multi-label prediction which progressively seeks true labels for training. It is adaptable to different types of unlabeled data and serves as a compensation for clustering based strategy. Experiments on PRW and CUHK-SYSU databases demonstrate the effectiveness of our method.
description: 10 pages, 7 figures
นวัตกรรมท้องถิ่นว่าด้วยการจัดทำงบประมาณรายจ่ายเพื่อการพัฒนาท้องถิ่น ศึกษาเฉพาะกรณีเทศบาลเมืองศรีสะเกษ
Creators: name: ปณัยกร บุญกอบ
Publisher: name: คณะนิติศาสตร์ มหาวิทยาลัยเชียงใหม่
Year: 2558
Subjects: นวัตกรรมท้องถิ่น, การจัดทำงบประมาณรายจ่าย, การพัฒนาท้องถิ่น

description: 1, 8, วารสารนิติสังคมศาสตร์
Grammatical elicitation: Ditransitive paradigms
Creators: name: Ramirez, Angela
name: Clem, Emily
name: Jung, Sihun
name: Lim, Jun Jie
name: Mayel, Milad
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2023
Subjects: subject: mvj

description: Elicitation of simple sentences involving ditransitive verbs give, bring and send. Elicitation leaders: Jun Jie Lim (recordings 1, 2), Milad Mayel (recordings 3, 4)
Generalizations and challenges for the spacetime block-diagonalization
Creators: name: Bokulić, Ana
name: Smolić, Ivica
Publisher: name: arXiv
Year: 2023
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: Discovery that gravitational field equations may coerce the spacetime metric with isometries to attain a block-diagonal form compatible with these isometries, was one of the gems built into the corpus of black hole uniqueness theorems. We revisit the geometric background of a block-diagonal metric with isometries, foliation defined by Killing vector fields and the corresponding Godbillon-Vey characteristic class. Furthermore, we analyse sufficient conditions for various matter sources, including scalar, nonlinear electromagnetic and Proca fields, that imply the isometry-compatible block-diagonal form of the metric. Finally, we generalize the theorem on the absence of null electromagnetic fields in static spacetimes to an arbitrary number of spacetime dimensions, wide class of gravitational field equations and nonlinear electromagnetic fields.
description: 22 pages (ver. 3: equation (51) corrected to m-dimensional case)
Contact of Single Asperities with Varying Adhesion: Comparing Continuum Mechanics to Atomistic Simulations
Creators: name: Luan, Binquan
name: Robbins, Mark O.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Atomistic simulations are used to test the equations of continuum contact mechanics in nanometer scale contacts. Nominally spherical tips, made by bending crystals or cutting crystalline or amorphous solids, are pressed into a flat, elastic substrate. The normal displacement, contact radius, stress distribution, friction and lateral stiffness are examined as a function of load and adhesion. The atomic scale roughness present on any tip made of discrete atoms is shown to have profound effects on the results. Contact areas, local stresses, and the work of adhesion change by factors of two to four, and the friction and lateral stiffness vary by orders of magnitude. The microscopic factors responsible for these changes are discussed. The results are also used to test methods for analyzing experimental data with continuum theory to determine information, such as contact area, that can not be measured directly in nanometer scale contacts. Even when the data appear to be fit by continuum theory, extracted quantities can differ substantially from their true values.
Ranks of matrices of logarithms of algebraic numbers I: the theorems of Baker and Waldschmidt-Masser
Creators: name: Dasgupta, Samit
Publisher: name: arXiv
Year: 2023
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 11J81

description: Let $\mathscr{L}$ denote the $\mathbf{Q}$-vector space of logarithms of algebraic numbers. In this expository work, we provide an introduction to the study of ranks of matrices with coefficients in $\mathscr{L}$. We begin by considering a slightly different question, namely we present a proof of a weak form of Baker's Theorem. This states that a collection of elements of $\mathscr{L}$ that is linearly independent over $\mathbf{Q}$ is in fact linear independent over $\overline{\mathbf{Q}}$. Next we recall Schanuel's Conjecture and prove Ax's analogue of it over $\mathbf{C}((t))$.
 We then consider arbitrary matrices with coefficients in $\mathscr{L}$ and state the Structural Rank Conjecture, which gives a conjecture for the rank of a general matrix with coefficients in $\mathscr{L}$. We prove the theorem of Waldschmidt and Masser, which provides a lower bound giving a partial result toward the Structural Rank Conjecture. We conclude by stating a new conjecture that we call the Matrix Coefficient Conjecture, which gives a necessary condition for a square matrix with coefficients in $\mathscr{L}$ to be singular.
description: 45 pages
CoShaRP: A Convex Program for Single-shot Tomographic Shape Sensing
Creators: name: Kadu, Ajinkya
name: van Leeuwen, Tristan
name: Batenburg, K. Joost
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Computational Engineering, Finance, and Science (cs.CE)
subject: Information Retrieval (cs.IR)
subject: Image and Video Processing (eess.IV)
subject: Optimization and Control (math.OC)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Mathematics

description: We introduce single-shot X-ray tomography that aims to estimate the target image from a single cone-beam projection measurement. This linear inverse problem is extremely under-determined since the measurements are far fewer than the number of unknowns. Moreover, it is more challenging than conventional tomography where a sufficiently large number of projection angles forms the measurements, allowing for a simple inversion process. However, single-shot tomography becomes less severe if the target image is only composed of known shapes. Hence, the shape prior transforms a linear ill-posed image estimation problem to a non-linear problem of estimating the roto-translations of the shapes. In this paper, we circumvent the non-linearity by using a dictionary of possible roto-translations of the shapes. We propose a convex program CoShaRP to recover the dictionary-coefficients successfully. CoShaRP relies on simplex-type constraint and can be solved quickly using a primal-dual algorithm. The numerical experiments show that CoShaRP recovers shapes stably from moderately noisy measurements.
description: Paper is currently under consideration for Pattern Recognition Letters
The effects of peer collaboration on student performance in solving process problems in mathematics
Creators: name: Ibuki, Betty Noriko
Publisher: name: University of British Columbia
Year: 2009

description: This study investigated the effects of group collaboration on children's performance in and their attitudes towards Math problem solving, compared to individual work. Twenty-eight grade six students in a single classroom were randomly assigned to either a group- or individual-work condition for eleven sessions of working with process problems in Math. An analysis of covariance conducted on group means of problem-solving posttests with the pre-test and test administration order held as covariates, showed no significant difference between the group-work and individual-work conditions. An analysis of covariance on the means of posttests of the attitudes towards problem solving scale with pretest held as covariate, showed no significant difference between the two conditions in changes in attitude towards problem solving. An analysis of variance performed on the means of the summary scores of the answers to problems solved by students during the eleven sessions showed a significant difference between the two conditions, favouring the group-work condition. Qualitative methods of analysis were used to assess the use of strategies and reveal group interaction activities that may have supported problem solving. Measures included transcriptions from individual interviews and six videotaped problem-solving sessions, answer sheets for problems solved, and recorded observations of students. Analyses showed no difference between the two conditions in the type or number of strategies used. Interaction patterns were identified in group collaboration that may have allowed for better problem solving by groups of students during the intervention period: (a) suggesting strategies or ideas; (b) evaluation, checking and monitoring activities; (c) feedback in the form of explanations and clarifications that supported understanding of the problem by group members; (d) specific speech patterns that showed students mimicing or echoing each other's comments, speaking simultaneously, or completing another's comment; (e) guiding discussion and facilitating the workload; and (f) group members persevering together in completing the assignment. Although significant differences between the group-work and individual-work conditions on posttest problems were not observed when students solved problems alone, the significant difference favouring group-work when the students were working together suggests that peer interaction for elementary school students may have positive results.
Ribbon cobordisms between lens spaces
Creators: name: Huber, Marius
Publisher: name: arXiv
Year: 2020
Subjects: subject: Geometric Topology (math.GT)
subject: FOS: Mathematics

description: We determine when there exists a ribbon rational homology cobordism between two connected sums of lens spaces, i.e. one without $3$-handles. In particular, we show that if a lens space $L$ admits a ribbon rational homology cobordism to a different lens space, then $L$ must be homeomorphic to $L(n,1)$, up to orientation-reversal. As an application, we classify ribbon $χ$-concordances between connected sums of $2$-bridge links. Our work builds on Lisca's work on embeddings of linear lattices.
description: 15 pages, comments welcome
Local Analysis of Nonlinear Oscillations of Thin Accretion Disks
Creators: name: Fogelström, Sara
name: Levin, Lina
name: Slapak, Rikard
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We calculated the coupling coefficients for non-linear, quasi-local oscillatory modes of thin accretion disks. We found that several of them are non-zero. Mode coupling is a necessary condition for a resonance, and thus our results may be relevant for the recently discussed QPO resonance model.
description: 15 pages, to be published in PASJ Vol. 60 No. 3
Proposal for a sensitive search for electric dipole moment of electron with matrix-isolated radicals
Creators: name: Kozlov, M. G.
name: Derevianko, Andrei
Publisher: name: arXiv
Year: 2006
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We propose using matrix-isolated paramagnetic diatomic molecules to search for the electric dipole moment of electron (eEDM). As was suggested by Shapiro in 1968, the eEDM leads to a magnetization of a sample in the external electric field. In a typical condensed matter experiment, the effective field on the unpaired electron is of the same order of magnitude as the laboratory field, typically about $10^{5}$V/cm. We exploit the fact that the effective electric field inside heavy polar molecules is in the order of $10^{10}$V/cm. This leads to a huge enhancement of the Shapiro effect. Statistical sensitivity of the proposed experiment may allow one to improve the current limit on eEDM by three orders of magnitude in few hours accumulation time.
description: 4 pages, 1 figure. Accepted to PRL. Final version: sensitivity analysis is improved, but conclusions remain the same
Quantifying the Role of Textual Predictability in Automatic Speech Recognition
Creators: name: Robertson, Sean
name: Penn, Gerald
name: Dunbar, Ewan
Publisher: name: arXiv
Year: 2024
Subjects: subject: Computation and Language (cs.CL)
subject: FOS: Computer and information sciences

description: A long-standing question in automatic speech recognition research is how to attribute errors to the ability of a model to model the acoustics, versus its ability to leverage higher-order context (lexicon, morphology, syntax, semantics). We validate a novel approach which models error rates as a function of relative textual predictability, and yields a single number, $k$, which measures the effect of textual predictability on the recognizer. We use this method to demonstrate that a Wav2Vec 2.0-based model makes greater stronger use of textual context than a hybrid ASR model, in spite of not using an explicit language model, and also use it to shed light on recent results demonstrating poor performance of standard ASR systems on African-American English. We demonstrate that these mostly represent failures of acoustic--phonetic modelling. We show how this approach can be used straightforwardly in diagnosing and improving ASR.
description: Proceedings of Interspeech 2024
Quantifying quantum coherence of multiple-charge states in tunable Josephson junctions
Creators: name: He, Jiangbo
name: Pan, Dong
name: Liu, Mingli
name: Lyu, Zhaozheng
name: Jia, Zhongmou
name: Yang, Guang
name: Zhu, Shang
name: Liu, Guangtong
name: Shen, Jie
name: Shevchenko, Sergey N.
name: Nori, Franco
name: Zhao, Jianhua
name: Lu, Li
name: Qu, Fanming
Publisher: name: arXiv
Year: 2023
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Coherence and tunneling play central roles in quantum phenomena. In a tunneling event, the time that a particle spends inside the barrier has been fiercely debated. This problem becomes more complex when tunneling repeatedly occurs back and forth, and when involving many particles. Here we report the measurement of the coherence time of various charge states tunneling in a nanowire-based tunable Josephson junction; including single charges, multiple charges, and Cooper pairs. We studied all the charge tunneling processes using Landau-Zener-Stückelberg-Majorana (LZSM) interferometry, and observed high-quality interference patterns. In particular, the coherence time of the charge states was extracted from the interference fringes in Fourier space. In addition, our measurements show the break-up of Cooper pairs, from a macroscopic quantum coherent state to individual particle states. Besides the fundamental research interest, our results also establish LZSM interferometry as a powerful technique to explore the coherence time of charges in hybrid devices.
description: 21+15 pages, 4+9 figures
Three-term arithmetic progressions and sumsets
Creators: name: Sanders, Tom
Publisher: name: arXiv
Year: 2006
Subjects: subject: Number Theory (math.NT)
subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Mathematics

description: Suppose that G is an abelian group and A is a finite subset of G containing no three-term arithmetic progressions. We show that |A+A| >> |A|(log |A|)^{1/3-ε} for all ε>0.
description: 20 pp. Corrected typos. Updated references. Corrected proof of Theorem 5.1. Minor revisions.
Universal clusters in quasi-two-dimensional ultracold Fermi mixtures
Creators: name: Liu, Ruijin
name: Shi, Tingting
name: Zaccanti, Matteo
name: Cui, Xiaoling
Publisher: name: arXiv
Year: 2024
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: We study universal clusters in quasi-two dimensions (q2D) that consist of a light (L) atom interacting with two or three heavy (H) identical fermions, forming the trimer or tetramer bound state. The axial confinement in q2D is shown to lift the three-fold degeneracy of 3D trimer (tetramer) in $p$-wave channel and uniquely select the ground state with magnetic angular momentum $|m|=1$ ($m=0$). By varying the interaction or confinement strength, we explore the dimensional crossover of these clusters from 3D to 2D, characterized by a gradual change of critical H-L mass ratio for their emergence and momentum-space distribution. Importantly, we find that a finite effective range will {\it not} alter their critical mass ratios in the weak coupling regime. There, we establish an effective 2D model to quantitatively reproduce the properties of q2D clusters, and further identify the optimal interaction strengths for their detections in experiments. Our results suggest a promising prospect for observing universal clusters and associated high-order correlation effects in realistic q2D ultracold Fermi mixtures.
description: 6 pages, 4 figures, with supplementary material (8 pages, 4 figures)