cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Machine learning approaches for flexible shop scheduling problems
Creators: name: Benda, Frank
Year: 2020

description: Die vorliegende PhD-Thesis bearbeitet im ersten und zweiten Projekt Themen aus dem Bereich Machine Learning für flexible Fließfertigungsprobleme. Die Basis für diese Projekte ist eine Industrie 4.0 Applikation des Industriepartners Syngroup. Für das dritte Projekt werden Daten des MedAustron Ionenstrahl-Centers in Wiener Neustadt herangezogen. Das Ziel des ersten Projektes war die Entwicklung einer Prioritätsregel in Form eines Entscheidungsbaumes. Der Baum wird hierbei durch die Verwendung hochqualitativer Lösungen basierend auf einer Constraintprogrammierung-Formulierung erstellt. Die Neuheit liegt dabei in der vereinheitlichten Entscheidungsfindung bezüglich Job- und Maschinenauswahl. Ein Random Forest wurde ebenfalls implementiert, um Überanpassung entgegenzuwirken. Der Ansatz wurde auf verschiedensten Problemstellungen angewendet und lieferte überzeugende Ergebnisse in Hinblick auf Verkürzung der Produktionsdauer vor allem im Vergleich zu einfachen Prioritätsregeln. Das zweite Thema beinhaltete die Entwicklung eines evolutionären Algorithmus (genetische Programmierung) für dieselbe Problemstellung. Hier werden ebenfalls Entscheidungsbäume erstellt, die dafür verwendet werden, ein Ranking für anstehende Materialbewegungen zu erstellen und die höchst gerankte Option auszuwählen. Die Ergebnisse wurden mit denen aus Projekt 1 verglichen. Es konnte eine deutliche Verbesserung gegenüber der Ergebnisse aus Projekt 1 festgestellt werden. Ein iterativer Ansatz zur Verbesserung bestehender Ablaufpläne führte ebenfalls zum gewünschten Ziel, die Produktionsdauer zu verkürzen. Im letzten Projekt wurde eine Regressionsanalyse durchgeführt. Hierbei wurden Daten von MedAustron bezüglich Ablaufplanung bei Behandlung von Krebs mittels Strahlentherapie dafür verwendet, die erwartete durchschnittliche Wartezeiten der Patienten in einem stochastischen Umfeld zu berechnen, um einen bestehenden, aufwändigen “sample average approximation”-Ansatz zu ersetzen. Dafür wurden zunächst Features definiert, die diese Wartezeit beeinflussen können und mittels Feature Selection die wichtigsten Features extrahiert. Mit diesen verschiedenen Feature Sets wurde dann eine Regressionsanalyse durchgeführt, sowie ein neuronales Netz für die Vorhersage implementiert. Die Ergebnisse zeigen, dass mit dem vorliegenden Ansatz eine vielversprechende Vorhersagegenauigkeit erreicht und der Ansatz durchaus als Ersatz für die “sample average approximation” verwendet werden kann.
Maximal integral point sets in affine planes over finite fields
Creators: name: Kiermaier, Michael
name: Kurz, Sascha
Publisher: name: arXiv
Year: 2008
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 51E2, 05B25

description: Motivated by integral point sets in the Euclidean plane, we consider integral point sets in affine planes over finite fields. An integral point set is a set of points in the affine plane $\mathbb{F}_q^2$ over a finite field $\mathbb{F}_q$, where the formally defined squared Euclidean distance of every pair of points is a square in $\mathbb{F}_q$. It turns out that integral point sets over $\mathbb{F}_q$ can also be characterized as affine point sets determining certain prescribed directions, which gives a relation to the work of Blokhuis. Furthermore, in one important sub-case integral point sets can be restated as cliques in Paley graphs of square order. In this article we give new results on the automorphisms of integral point sets and classify maximal integral point sets over $\mathbb{F}_q$ for $q\le 47$. Furthermore, we give two series of maximal integral point sets and prove their maximality.
description: 18 pages, 3 figures, 2 tables
Augmented Sparse Reconstruction of Protein Signaling Networks
Creators: name: Napoletani, D.
name: Sauer, T.
name: Struppa, D. C.
name: Petricoin, E.
name: Liotta, L.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: Molecular Networks (q-bio.MN)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: The problem of reconstructing and identifying intracellular protein signaling and biochemical networks is of critical importance in biology today. We sought to develop a mathematical approach to this problem using, as a test case, one of the most well-studied and clinically important signaling networks in biology today, the epidermal growth factor receptor (EGFR) driven signaling cascade. More specifically, we suggest a method, augmented sparse reconstruction, for the identification of links among nodes of ordinary differential equation (ODE) networks from a small set of trajectories with different initial conditions. Our method builds a system of representation by using a collection of integrals of all given trajectories and by attenuating block of terms in the representation itself. The system of representation is then augmented with random vectors, and minimization of the 1-norm is used to find sparse representations for the dynamical interactions of each node. Augmentation by random vectors is crucial, since sparsity alone is not able to handle the large error-in-variables in the representation. Augmented sparse reconstruction allows to consider potentially very large spaces of models and it is able to detect with high accuracy the few relevant links among nodes, even when moderate noise is added to the measured trajectories. After showing the performance of our method on a model of the EGFR protein network, we sketch briefly the potential future therapeutic applications of this approach.
description: 24 pages, 6 figures
Using an Expert Panel to Validate the Malaysian SMEs-Software Process Improvement Model (MSME-SPI)
Creators: name: Almomani, Malek
name: Basri, Shuib
name: Almomani, Omar
name: Capretz, Luiz Fernando
name: Balogun, Abdullateef
name: Husni, Moath
name: Gilal, Abdul Rehman
Publisher: name: arXiv
Year: 2021
Subjects: subject: Software Engineering (cs.SE)
subject: FOS: Computer and information sciences

description: This paper presents the components of a newly developed Malaysian SMEs - Software Process Improvement model (MSME-SPI) that can assess SMEs soft-ware development industry in managing and improving their software processes capability. The MSME-SPI is developed in response to practitioner needs that were highlighted in an empirical study with the Malaysian SME software development industry. After the model development, there is a need for independent feedback to show that the model meets its objectives. Consequently, the validation phase is performed by involving a group of software process improvement experts in examining the MSME-SPI model components. Besides, the effectiveness of the MSME-SPI model is validated using an expert panel. Three criteria were used to evaluate the effectiveness of the model namely: usefulness, verifiability, and structure. The results show the model effective to be used by SMEs with minor modifications. The validation phase contributes towards a better understanding and use of the MSME-SPI model by the practitioners in the field.
Making Computers Actually Useful for Historical Linguists
Creators: name: Gong, Xun
Publisher: name: Zenodo
Year: 2020
Subjects: Historical Linguistics

description: Note: This talk has not gone through a process of peer review, and findings should therefore be treated as preliminary and subject to change. SOAS Linguistics Webinars
 16 December 2020 Xun GONG 龚勋
 Postdoctoral Fellow, SOAS University of London Abstract: Classical comparative and historical linguistics has a number of computational approaches, which, despite their sophistication, are rarely used by historical linguists in their day-to-day work. CAPR, a newly developed computer-assisted workflow, address the challenge. It supports historical linguists throughout the entire process of linguistic reconstruction, from lexica of daughter languages to an etymological dictionary. Through careful workflow design and innovative user interfaces powered by finite-state transducers, CAPR makes the investigation of language groups without a well-established comparative tradition to linguistic reconstruction incremental, almost gamified. Complex hypotheses can be built up in manageable steps, each supported by optimal information presentation and rapid feedback.
Η μορφή του Χριστού στα εικονογραφημένα χειρόγραφα του Αγίου Όρους, 9ος αι. – 1204 μ.Χ.
Creators: name: Κουρουζίδης, Χριστόφορος Ι.
Publisher: name: Aristotle University of Thessaloniki
Year: 2020
Subjects: Χριστός
Εικονογραφία
Χειρόγραφα
Μικρογραφίες
Christ
Iconography
Manuscripts
Miniatures

description: Η παρούσα διδακτορική διατριβή επιδιώκει να εξετάσει τη μορφή του Χριστού στα εικονογραφημένα χειρόγραφα του Αγίου Όρους, από τον 9ο αιώνα έως το 1204 μ.Χ. Αρχικά εξετάστηκαν όλοι οι κώδικες των ιερών μονών, για να εντοπιστεί η μορφή του Χριστού. Επιχειρήθηκε κατηγοριοποίηση ως προς το θέμα της κάθε εικόνας και μετά ως προς το είδος της κάθε μικρογραφίας. Στη συνέχεια έγινε κατάταξη συνολικά κάθε κώδικα ανά περίοδο που δημιουργήθηκε. Επιπλέον έγινε ανάλυση συγκεκριμένων τύπων του Χριστού που βρέθηκαν στα εικονογραφημένα χειρόγραφα. Στο τέλος, εξετάστηκαν συνολικά ως προς τη μορφή του Χριστού, τα είδη της μικρογραφίας, οι πηγές των εικονογραφικών θεμάτων, το περιεχόμενο και η θεματολογία των κωδίκων και οι εικονογραφικοί τύποι.
description: The present doctoral thesis seeks to examine the figure of Christ in the illuminated manuscripts of Mount Athos from the 9th century to 1204 a.d. First, all the codes from the sacred monasteries were examined to locate the figure of Christ. Categorization was attempted over the subject of every icon and then over the type of every miniature. Next, every code was classified by period of creation. Furthermore an analysis of specific types of Christ as found in the illuminated manuscripts was performed. Finally, the types of Iconography and miniatures, the sources of the iconographic subjects as well as the themes of the codes on the figure of Christ were examined as a whole.
Inelastic scattering rates in d-wave superconductors
Creators: name: Paaske, J.
name: Khveshchenko, D. V.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: The inelastic scattering rates of quasiparticles in a two-dimensional d-wave superconductor, which arise from interactions with either acoustic phonons or other quasiparticles, are calculated within second order perturbation theory. We discover a strong enhancement of scattering with collinear momenta, brouth about by the special kinematics of the two-dimensional fermions with Dirac-like spectrum near the nodes of the d-wave order parameter. In the case of a local instantaneous interparticle potential we find that either an RPA-type resummation of the perturbation series or an inclusion of non-linear corrections to the Dirac spectrum is called for in order to obtain a finite scattering rate in the limit $ω/T\to 0$. In either way, we find drastic changes in the scattering rate, as compared to the naively expected cubic temperature dependence.
description: This paper was published some years back but was never uploaded to arXiv
title: Status Of Reproductive System Of Mackerel During Its Feeding In The Norwegian Sea
Creators: name: Mazhirina, G.P.
name: Tereshchenko, E.S.
name: Shamrai, E.A.
Publisher: name: ASC 1998 - DD
Year: 2024
Subjects: Ecosystem observation, processes and dynamics

description: No abstracts are to be cited without prior reference to the author.Spawning of Western mackerel takes place in the period from March to June in the areas situated southwest and west of the Irish shelf Postspawning fish migrate northwards reaching the Norwegian Sea where it is distributed in the area 61°- 64°N west of the zero meridian. Feeding migrations of the North Sea mackerel spawning off the southwestern shores of Norway and Shetland Isles start about a month later.
Bosonic Quantum Gravity According to the Global One-Dimensionality Conjecture
Creators: name: Glinka, Lukasz Andrzej
Publisher: name: arXiv
Year: 2008
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In this paper, making use of the global one-dimensionality conjecture, we discuss the reduction of the Wheeler-DeWitt quantum geometrodynamics to the Klein-Gordon equation describing the scalar bosonic particle. The method of second quantization in the appropriate Fock space is applied, and, employing both the Bogoliubov transformation as well as Heisenberg equations of motion, the quantum gravity is expressed as evolution of the creators and annihilators related to the initial data. It is shown that this procedure leads to the understanding of the boson mass, through the one-point two-boson quantum correlations, as a scaled initial data mass.
description: 17 pages
Local origin of the strong field-space anisotropy in the magnetic phase diagrams of Ce$_{1-x}$La$_x$B$_6$ measured in a rotating magnetic field
Creators: name: Inosov, D. S.
name: Avdoshenko, S.
name: Portnichenko, P. Y.
name: Choi, Eun Sang
name: Schneidewind, A.
name: Mignot, J. -M.
name: Nikolo, M.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Cubic f-electron compounds commonly exhibit highly anisotropic magnetic phase diagrams consisting of multiple long-range ordered phases. Field-driven metamagnetic transitions between them may depend not only on the magnitude, but also on the direction of the applied magnetic field. Examples of such behavior are plentiful among rare-earth borides, such as RB$_6$ or RB$_{12}$ ($R$ = rare earth). In this work, for example, we use torque magnetometry to measure anisotropic field-angular phase diagrams of La-doped cerium hexaborides, Ce$_{1-x}$La$_x$B$_6$ ($x$ = 0, 0.18, 0.28, 0.5). One expects that field-directional anisotropy of phase transitions must be impossible to understand without knowing the magnetic structures of the corresponding competing phases and being able to evaluate their precise thermodynamic energy balance. However, this task is usually beyond the reach of available theoretical approaches, because the ordered phases can be noncollinear, possess large magnetic unit cells, involve higher-order multipoles of 4f ions rather than simple dipoles, or just lack sufficient microscopic characterization. Here we demonstrate that the anisotropy under field rotation can be qualitatively understood on a much more basic level of theory, just by considering the crystal-electric-field scheme of a pair of rare-earth ions in the lattice, coupled by a single nearest-neighbor exchange interaction. Transitions between different crystal-field ground states, calculated using this minimal model for the parent compound CeB6, possess field-directional anisotropy that strikingly resembles the experimental phase diagrams. This implies that the anisotropy of phase transitions is of local origin and is easier to describe than the ordered phases themselves.
description: To be published in Phys. Rev. B; v2: minor typographic corrections
การพัฒนารูปแบบการฝึกอบรมครูแบบผสมผสานในการทำวิจัยในชั้นเรียน
Creators: name: พัชนี กุลฑานันท์
name: พิสิฐ เมธาภัทร
name: ไพโรจน์ สถิรยากร
name: มนต์ชัย เทียนทอง
Publisher: name: มหาวิทยาลัยราชภัฏมหาสารคาม
Year: 2011
Subjects: รูปแบบการฝึกอบรมแบบผสมผสาน, วิจัยในชั้นเรียน

description: 2, 5, วารสารมหาวิทยาลัยราชภัฏมหาสารคามมนุษยศาสตร์และสังคมศาสตร์
The Loudest Stellar Heartbeat: Characterizing the most extreme amplitude heartbeat star system
Creators: name: Jayasinghe, T.
name: Kochanek, C. S.
name: Strader, J.
name: Stanek, K. Z.
name: Vallely, P. J.
name: Thompson, Todd A.
name: Hinkle, J. T.
name: Shappee, B. J.
name: Dupree, A. K.
name: Auchettl, K.
name: Chomiuk, L.
name: Aydi, E.
name: Dage, K.
name: Hughes, A.
name: Shishkovsky, L.
name: Sokolovsky, K. V.
name: Swihart, S.
name: Voggel, K. T.
name: Thompson, I. B.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We characterize the extreme heartbeat star system MACHO 80.7443.1718 in the LMC using TESS photometry and spectroscopic observations from the Magellan Inamori Kyocera Echelle (MIKE) and SOAR Goodman spectographs. MACHO 80.7443.1718 was first identified as a heartbeat star system in the All-Sky Automated Survey for SuperNovae (ASAS-SN) with $P_{\rm orb}=32.836\pm0.008\,{\rm d}$. MACHO 80.7443.1718 is a young (${\sim}6$~Myr), massive binary, composed of a B0 Iae supergiant with $M_1 \simeq 35 M_\odot$ and an O9.5V secondary with $M_2 \simeq 16 M_\odot$ on an eccentric ($e=0.51\pm0.03$) orbit. In addition to having the largest variability amplitude amongst all known heartbeats stars, MACHO 80.7443.1718 is also one of the most massive heartbeat stars yet discovered. The B[e] supergiant has Balmer emission lines and permitted/forbidden metallic emission lines associated with a circumstellar disk. The disk rapidly dissipates at periastron which could indicate mass transfer to the secondary, but re-emerges immediately following periastron passage. MACHO 80.7443.1718 also shows tidally excited oscillations at the $N=25$ and $N=41$ orbital harmonics and has a rotational period of 4.4 d.
description: 21 pages, 16 figures. Submitted to MNRAS
ดีเอ็นเอบาร์โค้ดเพื่อการระบุชนิดของสิ่งมีชีวิตกรณีศึกษา :  จีน Cytochrome c Oxidase I (COI) ในสัตว
Creators: name: พรณรงค์ สิริปิยะสิงห์
name: อรุณรัตน์ ฉวีราช
Publisher: name: มหาวิทยาลัยราชภัฏมหาสารคาม
Year: 2011
Subjects: ดีเอ็นเอบาร์โค้ดจีน, Cytochrome c Oxidase I

description: 2, 5, วารสารมหาวิทยาลัยราชภัฏมหาสารคามมนุษยศาสตร์และสังคมศาสตร์
The numerical treatment of ill-posed problems using the method of conjugate gradients
Creators: name: Ross, Sally A.
Publisher: name: University of British Columbia
Year: 2010

description: This thesis examines the use of the method of Conjugate Gradients as an iterative method to be applied to linear system of equations that are ill-conditioned. An overview of the particular problems associated with the solution of ill-conditioned linear systems is given and the method of Conjugate Gradients described. It is shown that, at each iteration, the method of Conjugate Gradients weights the contribution from the singular vectors using a polynomial that is characterized as the solution to a weighted least squares problem. The form of the polynomials is shown to approximate a series of interpolating polynomials that constitute an efficient filtering technique required for computing solutions to ill-conditioned systems. The performance of the method of Conjugate Gradients is shown to compare favourably with other accepted methods for ill-conditioned linear systems. An application from the field of image processing is given and the efficient computation of a smooth reconstructed image from a defocussed picture is demonstrated.
Isolate record for VAFB-ISO-714
Creators: name: Holloway, Corinne
Year: 1900
Subjects: subject: Santa Barbara (County)
valueUri: https://core.tdar.org/browse/geographic-keyword/3486/santa-barbara-county
subject: Vandenberg Air Force Base (VAFB)
valueUri: https://core.tdar.org/browse/geographic-keyword/85469/vandenberg-air-force-base-vafb
subject: Vandenberg Space Force Base (VSFB)
valueUri: https://core.tdar.org/browse/geographic-keyword/85584/vandenberg-space-force-base-vsfb
subject: California (State / Territory)
valueUri: https://core.tdar.org/browse/geographic-keyword/1484/california-state-territory
subject: Chipped Stone
valueUri: https://core.tdar.org/browse/material-type/2/chipped-stone
subject: Reconnaissance / Survey
valueUri: https://core.tdar.org/browse/investigation-type/7/reconnaissance-survey

description: This document is the isolated find record for VAFB-ISO-714. The artifact is a chopping tool.
Interior Point Decoding for Linear Vector Channels
Creators: name: Wadayama, Tadashi
Publisher: name: arXiv
Year: 2007
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: In this paper, a novel decoding algorithm for low-density parity-check (LDPC) codes based on convex optimization is presented. The decoding algorithm, called interior point decoding, is designed for linear vector channels. The linear vector channels include many practically important channels such as inter symbol interference channels and partial response channels. It is shown that the maximum likelihood decoding (MLD) rule for a linear vector channel can be relaxed to a convex optimization problem, which is called a relaxed MLD problem. The proposed decoding algorithm is based on a numerical optimization technique so called interior point method with barrier function. Approximate variations of the gradient descent and the Newton methods are used to solve the convex optimization problem. In a decoding process of the proposed algorithm, a search point always lies in the fundamental polytope defined based on a low-density parity-check matrix. Compared with a convectional joint message passing decoder, the proposed decoding algorithm achieves better BER performance with less complexity in the case of partial response channels in many cases.
description: 18 pages, 17 figures, The paper has been submitted to IEEE Transaction on Information Theory
Possible Magnetic Activity in the Low Mass X-ray Binary EXO 0748-676
Creators: name: Wolff, Michael T.
name: Wood, Kent S.
name: Ray, Paul S.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We report evidence of magnetic activity associated with the secondary star in the EXO 0748-676 low mass X-ray binary system. An analysis of a sequence of five consecutive X-ray eclipses observed during December 2003 with the RXTE satellite brings out a feature occurring during ingress we interpret as the X-ray photoelectric absorption shadow, as seen by an observer at Earth, of a plasma structure suspended above the surface of the secondary star. The light curve feature consists of an initial drop in count rate to near zero (the absorption shadow) with a very short rebound to a significant fraction of the pre-ingress count rate and then a final plunge to totality over a total time scale of ~25 s. The ingress feature persists for at least 5 consecutive orbital periods (a total of ~19 hr), and possibly up to 5 days in our data. Our data also show significant post-egress dipping during this eclipse sequence, unusual for this source, indicating possible secondary star mass ejection during this episode.
description: Accepted by Astrophysical Journal Letters; 11 Pages including 3 figures and 1 table
Practitioners Testimonials about Software Testing
Creators: name: Waychal, Pradeep
name: Capretz, Luiz Fernando
name: Jia, Jingdong
name: Varona, Daniel
name: Lizama, Yadira
Publisher: name: arXiv
Year: 2021
Subjects: subject: Software Engineering (cs.SE)
subject: FOS: Computer and information sciences

description: As software systems are becoming more pervasive, they are also becoming more susceptible to failures, resulting in potentially lethal combinations. Software testing is critical to preventing software failures but is, arguably, the least understood part of the software life cycle and the toughest to perform correctly. Adequate research has been carried out in both the process and technology dimensions of testing, but not in the human dimensions. This paper attempts to fill in the gap by exploring the human dimension, i.e., trying to understand the motivation of software professionals to take up and sustain testing careers. Towards that end, a survey was conducted in four countries - India, Canada, Cuba, and China - to try to understand how professional software testers perceive and value work-related factors that could influence their motivation to take up and sustain testing careers. With a sample of 220 software professionals, we observed that very few professionals are keen to take up testing careers. Some aspects of software testing, such as the learning opportunities, appear to be a common motivator across the four countries; whereas the treatment meted out to testers as second-class citizens and the complexity of the job appeared to be the most important de-motivators. This comparative study offers useful insights that can help global software industry leaders to come up with an action plan to put the software testing profession under a new light. That could increase the number of software engineers choosing testing careers, which would facilitate quality testing.
Macroscopic Greenberger-Horne-Zeilinger and W States in Flux Qubits
Creators: name: Kim, Mun Dae
name: Cho, Sam Young
Publisher: name: arXiv
Year: 2007
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We investigate two types of genuine three-qubit entanglement, known as the Greenberger-Horne-Zeilinger(GHZ) and W states, in a macroscopic quantum system. Superconducting flux qubits are considered theoretically in order to generate such states. A phase coupling is proposed to offer enough strength of interactions between qubits. While an excited state can be the W state, the GHZ state is formed at the ground state of the three flux qubits. The GHZ and W states are shown to be robust against external flux fluctuations for feasible experimental realizations.
description: 5 pages, 3 figures, version to appear in Phys. Rev. B (Rapid Comm.)
Spectroscopic follow-up of a cluster candidate at z = 1.45
Creators: name: van Breukelen, Caroline
name: Cotter, Garret
name: Rawlings, Steve
name: Readhead, Tony
name: Bonfield, David
name: Clewley, Lee
name: Ivison, Rob
name: Jarvis, Matt
name: Simpson, Chris
name: Watson, Mike
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We have obtained deep optical spectroscopic data of the highest-redshift cluster candidate (z ~ 1.4, CVB13) selected by Van Breukelen et al. (2006) in a photometric optical/infrared catalogue of the Subaru XMM-Newton Deep Field. The data, which comprise 104 targeted galaxies, were taken with the DEep Imaging Multi-Object Spectrograph (DEIMOS) on the Keck 2 telescope and yielded 31 secure redshifts in the range 1.25 < z < 1.54 within a 7' x 4' field centred on CVB13. Instead of one massive cluster at z = 1.4, we find evidence for three projected structures at z = 1.40, z = 1.45, and z = 1.48. The most statistically robust of these structures, at z = 1.454, has six spectroscopically confirmed galaxies. Its total mass is estimated at > 10^14 M_sun and it may therefore be termed a cluster. There is an X-ray source at the cluster position which is marginally spatially resolved but whose X-ray spectrum is too hard to be thermal cluster emission. Its origin could be the summed X-ray emission from active galaxies in, and projected onto, the cluster. Serendipitously we have discovered a cluster at z = 1.28 with a mass of > 10^14 M_sun at the same position on the sky, comprising six spectroscopically confirmed cluster galaxies and at least one additional radio source. The selection of CVB13 for the cluster catalogue was evidently aided by the superposition of other, presumably lower-mass, structures, whereas the single cluster at z = 1.28 contained too few galaxies to be isolated by the same algorithm. Given the complicated nature of such structures, caution must be employed when measuring the mass function of putative high-redshift clusters with photometric techniques alone.
description: 15 pages, 7 figures, 2 tables, accepted for publication in MNRAS The figures in this version are low resolution; for a high-resolution version see http://www-astro.physics.ox.ac.uk/~cvb/cluster_cvb13_v2.ps.gz (replaced to repair broken link for full-resolution version)
Titans metal-poor reference stars. I. Accurate effective temperatures and surface gravities for dwarfs and subgiants from 3D non-LTE H$α$ profiles and Gaia parallaxes
Creators: name: Giribaldi, Riano E.
name: da Silva, André R.
name: Smiljanic, Rodolfo
name: Espinoza, Deysi Cornejo
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Several large stellar spectroscopic surveys are producing overwhelming amounts of data that can be used for determining stellar atmospheric parameters and chemical abundances. Nonetheless, the accuracy achieved in the derived astrophysical parameters is still insufficient, mainly because of the paucity of adequate calibrators, particularly in the metal-poor regime ([Fe/H] $\leq -$1.0). Here, we introduce the Titans metal-poor reference stars: a sample of 41 dwarf and subgiant stars with accurate parameters. Effective temperatures (Teff) were derived by fitting observed H$α$ profiles with synthetic lines computed using 3D hydrodynamic NLTE models. Surface gravities (logg) were computed using evolutionary tracks and parallaxes from Gaia EDR3. The same methods recover the Teff values of the Gaia benchmark stars, which are mostly based on interferometric measurements, with a 1$σ$ dispersion of $\pm 50$ K. We assume this to be the accuracy of the H$α$ profiles computed from 3D non-LTE models for metal-poor dwarfs and subgiants. We achieved an internal precision typically between 30-40 K, these errors dominated by instrumental effects. The final total uncertainty for the Teff values of the Titans are thus estimated to be of the order of $1\%$. The typical error for logg is $\leq$ 0.04 dex. In addition, we identified a few members of Gaia-Enceladus, of Sequoia, and of the Helmi stream in our sample. These stars can pave the way for the accurate chemical characterization of these Galactic substructures. Using the Titans as reference, large stellar surveys will be able to improve the internal calibration of their astrophysical parameters. Ultimately, this sample will help users of data from Gaia and large surveys in reaching their goal of redefining our understanding of stars, stellar systems, and the Milky Way.
description: Accepted in A&A
A Littelmann path model for crystals of Generalized Kac-Moody algebras revisited
Creators: name: Joseph, Anthony
name: Lamprou, Polyxeni
Publisher: name: arXiv
Year: 2008
Subjects: subject: Representation Theory (math.RT)
subject: FOS: Mathematics
subject: 17B37

description: A Littelmann path model is constructed for crystals pertaining to a not necessarily symmetrizable Borcherds-Cartan matrix. Here one must overcome several combinatorial problems coming from the imaginary simple roots. The main results are an isomorphism theorem and a character formula of Borcherds-Kac-Weyl type for the crystals. In the symmetrizable case, the isomorphism theorem implies that the crystals constructed by this path model coincide with those of Jeong, Kang, Kashiwara and Shin obtained by taking the limit at q=0 in the quantized enveloping algebra.
description: This is a carefully rewritten version of our paper "A Littelmann path model for crystals of Generalized Kac-Moody algebras" in which some bad and unclear points in the original work are addressed, clarified and corrected
Learning Syntax from Naturally-Occurring Bracketings
Creators: name: Shi, Tianze
name: İrsoy, Ozan
name: Malioutov, Igor
name: Lee, Lillian
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computation and Language (cs.CL)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences
subject: I.2.7

description: Naturally-occurring bracketings, such as answer fragments to natural language questions and hyperlinks on webpages, can reflect human syntactic intuition regarding phrasal boundaries. Their availability and approximate correspondence to syntax make them appealing as distant information sources to incorporate into unsupervised constituency parsing. But they are noisy and incomplete; to address this challenge, we develop a partial-brackets-aware structured ramp loss in learning. Experiments demonstrate that our distantly-supervised models trained on naturally-occurring bracketing data are more accurate in inducing syntactic structures than competing unsupervised systems. On the English WSJ corpus, our models achieve an unlabeled F1 score of 68.9 for constituency parsing.
description: NAACL 2021
Average Stopping Set Weight Distribution of Redundant Random Matrix Ensembles
Creators: name: Wadayama, Tadashi
Publisher: name: arXiv
Year: 2007
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: In this paper, redundant random matrix ensembles (abbreviated as redundant random ensembles) are defined and their stopping set (SS) weight distributions are analyzed. A redundant random ensemble consists of a set of binary matrices with linearly dependent rows. These linearly dependent rows (redundant rows) significantly reduce the number of stopping sets of small size. An upper and lower bound on the average SS weight distribution of the redundant random ensembles are shown. From these bounds, the trade-off between the number of redundant rows (corresponding to decoding complexity of BP on BEC) and the critical exponent of the asymptotic growth rate of SS weight distribution (corresponding to decoding performance) can be derived. It is shown that, in some cases, a dense matrix with linearly dependent rows yields asymptotically (i.e., in the regime of small erasure probability) better performance than regular LDPC matrices with comparable parameters.
description: 14 pages, 7 figures, Conference version to appear at the 2007 IEEE International Symposium on Information Theory, Nice, France, June 2007
Hubble Space Telescope UV and H$α$ Measurements of the Accretion Excess Emission from the Young Giant Planet PDS 70 b
Creators: name: Zhou, Yifan
name: Bowler, Brendan P.
name: Wagner, Kevin R.
name: Schneider, Glenn
name: Apai, Dániel
name: Kraus, Adam L.
name: Close, Laird M.
name: Herczeg, Gregory J.
name: Fang, Min
Publisher: name: arXiv
Year: 2021
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Recent discoveries of young exoplanets within their natal disks offer exciting opportunities to study ongoing planet formation. In particular, a planet's mass accretion rate can be constrained by observing the accretion-induced excess emission. So far, planetary accretion is only probed by the H$α$ line, which is then converted to a total accretion luminosity using correlations derived for stars. However, the majority of the accretion luminosity is expected to emerge from hydrogen continuum emission, and is best measured in the ultraviolet (UV). In this paper, we present HST/WFC3/UVIS F336W (UV) and F656N (H$α$) high-contrast imaging observations of PDS 70. Applying a suite of novel observational techniques, we detect the planet PDS 70 b with signal-to-noise ratios of 5.3 and 7.8 in the F336W and F656N bands, respectively. This is the first time that an exoplanet has been directly imaged in the UV. Our observed H$α$ flux of PDS 70 b is higher by $3.5σ$ than the most recent published result. However, the light curve retrieved from our observations does not support greater than 30% variability in the planet's H$α$ emission in six epochs over a five-month timescale. We estimate a mass accretion rate of $1.4\pm0.2\times10^{-8}M_{\mathrm{Jup}}/\mathrm{yr}$. H$α$ accounts for 36% of the total accretion luminosity. Such a high proportion of energy released in line emission suggests efficient production of H$α$ emission in planetary accretion, and motivates using the H$α$ band for searches of accreting planets. These results demonstrate HST/WFC3/UVIS's excellent high-contrast imaging performance and highlight its potential for planet formation studies.
description: Published on Astronomical Journal
A supra-convergent scheme for the solution of differential equations on an arbitrary mesh
Creators: name: Scott, Karen
Publisher: name: University of British Columbia
Year: 2010

description: This thesis describes a compact numerical scheme to solve second-order linear differential equations with Dirichlet boundary conditions on arbitrary meshes. The scheme uses a staggered grid to achieve second-order accuracy on a nonuniform mesh. Regular and singularly perturbed problems in one and higher dimensions are considered. Numerical experiments are presented which support the theoretical results. The methods presented are also applicable to equations with other types of boundary conditions, and to nonlinear and higher-order differential equations.
title: Longterm Studies On Spawning In Arcto - Norwegian Cod - Mortality Pattern Of Eggs And Early Larvae
Creators: name: Solemdal, Per
name: Makhotin, Valery
name: Fonn, Merete
Publisher: name: ASC 1998 - DD
Year: 2024
Subjects: Ecosystem observation, processes and dynamics

description: No abstracts are to be cited without prior reference to the author.The ongoing studies are efforts to document the ideas of Soviet scientists that first time spawners produced·eggs ahd early larvae of lower viability than multiple spawners. This phenomenon will be of importance both in management offish populations and in a fish farming.
Vector chiral states in low-dimensional quantum spin systems
Creators: name: Dillenschneider, Raoul
name: Kim, Jung Hoon
name: Han, Jung Hoon
Publisher: name: arXiv
Year: 2007
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: A class of exact spin ground states with nonzero averages of vector spin chirality, $$, is presented. It is obtained by applying non-uniform O(2) rotations of spin operators in the XY plane on the SU(2)-invariant Affleck-Kennedy-Lieb-Tasaki (AKLT) states and their parent Hamiltonians. Excitation energies of the new ground states are studied with the use of single-mode approximation in one dimension for S=1. The excitation gap remains robust. Construction of chiral AKLT states is shown to be possible in higher dimensions. We also present a general idea to produce vector chirality-condensed ground states as non-uniform O(2) rotations of the non-chiral parent states. Dzyaloshinskii-Moriya interaction is shown to imply non-zero spin chirality.
description: 4 pages, 1 figure
Diversity-Aware Batch Active Learning for Dependency Parsing
Creators: name: Shi, Tianze
name: Benton, Adrian
name: Malioutov, Igor
name: İrsoy, Ozan
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computation and Language (cs.CL)
subject: Artificial Intelligence (cs.AI)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences
subject: I.2.7

description: While the predictive performance of modern statistical dependency parsers relies heavily on the availability of expensive expert-annotated treebank data, not all annotations contribute equally to the training of the parsers. In this paper, we attempt to reduce the number of labeled examples needed to train a strong dependency parser using batch active learning (AL). In particular, we investigate whether enforcing diversity in the sampled batches, using determinantal point processes (DPPs), can improve over their diversity-agnostic counterparts. Simulation experiments on an English newswire corpus show that selecting diverse batches with DPPs is superior to strong selection strategies that do not enforce batch diversity, especially during the initial stages of the learning process. Additionally, our diversityaware strategy is robust under a corpus duplication setting, where diversity-agnostic sampling strategies exhibit significant degradation.
description: NAACL 2021
title: Fish Aggregations Near The Seabed
Creators: name: Maclennan, David N.
name: Simmonds, E. John
Publisher: name: ASC 1998 - J
Year: 2024
Subjects: Fisheries and aquaculture
Ecosystem observation, processes and dynamics

description: No abstracts are to be cited without prior reference to the author.This paper considers the seabed detection problem in relation to the characteristics of nearby fish aggregations. Experiments on caged fish aggregations havei been conducted using a tower frame apparatus at a field station on the West Coast of Scotland. The tower is 10 m high with a split-beam transducer at the top and a fish cage at the bottom. In experiments with various densities and sizes of gadoids in the cage, echoes from the vicinity of the seabed have been studied oveir hard.and !lOftmound. Thei effect of a bottom slope may be simulated by rotating the transducer.
Joint Learning of Deep Retrieval Model and Product Quantization based Embedding Index
Creators: name: Zhang, Han
name: Shen, Hongwei
name: Qiu, Yiming
name: Jiang, Yunjiang
name: Wang, Songlin
name: Xu, Sulong
name: Xiao, Yun
name: Long, Bo
name: Yang, Wen-Yun
Publisher: name: arXiv
Year: 2021
Subjects: subject: Information Retrieval (cs.IR)
subject: FOS: Computer and information sciences
subject: H.3.3

description: Embedding index that enables fast approximate nearest neighbor(ANN) search, serves as an indispensable component for state-of-the-art deep retrieval systems. Traditional approaches, often separating the two steps of embedding learning and index building, incur additional indexing time and decayed retrieval accuracy. In this paper, we propose a novel method called Poeem, which stands for product quantization based embedding index jointly trained with deep retrieval model, to unify the two separate steps within an end-to-end training, by utilizing a few techniques including the gradient straight-through estimator, warm start strategy, optimal space decomposition and Givens rotation. Extensive experimental results show that the proposed method not only improves retrieval accuracy significantly but also reduces the indexing time to almost none. We have open sourced our approach for the sake of comparison and reproducibility.
description: 4 pages, 4 figures; accepted by SIGIR2021
title: The Impact Of Changing Stock Size On The Aggregative Behaviour Of North Sea Herring
Creators: name: Aukland, R.
name: Reid, D.
Publisher: name: ASC 1998 - J
Year: 2024
Subjects: Fisheries and aquaculture
Ecosystem observation, processes and dynamics

description: No abstracts are to be cited without prior reference to the author.Using Image Analysis techniques we have developed a database of schools from data recorded during the acoustic surveys for herring in the NW North Sea between 1994-1997.
Formal analytical solutions for the Gross-Pitaevskii equation
Creators: name: Trallero-Giner, C.
name: Drake-Perez, Julio C.
name: Lopez-Richard, V.
name: Birman, Joseph L.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: Considering the Gross-Pitaevskii integral equation we are able to formally obtain an analytical solution for the order parameter $Φ(x)$ and for the chemical potential $μ$ as a function of a unique dimensionless non-linear parameter $Λ$. We report solutions for different range of values for the repulsive and the attractive non-linear interactions in the condensate. Also, we study a bright soliton-like variational solution for the order parameter for positive and negative values of $Λ$. Introducing an accumulated error function we have performed a quantitative analysis with other well-established methods as: the perturbation theory, the Thomas-Fermi approximation, and the numerical solution. This study gives a very useful result establishing the universal range of the $Λ$-values where each solution can be easily implemented. In particular we showed that for $Λ
description: 8 figures
Evidence for differentiation of the most primitive small bodies
Creators: name: Carry, B.
name: Vernazza, P.
name: Vachier, F.
name: Neveu, M.
name: Hanus, J. Berthier J.
name: Ferrais, M.
name: Jorda, L.
name: Marsset, M.
name: Viikinkoski, M.
name: Bartczak, P.
name: Behrend, R.
name: Benkhaldoun, Z.
name: Birlan, M.
name: Castillo-Rogez, J.
name: Cipriani, F.
name: Colas, F.
name: Drouard, A.
name: Dudzinski, G. P.
name: Desmars, J.
name: Dumas, C.
name: Durech, J.
name: Fetick, R.
name: Fusco, T.
name: Grice, J.
name: Jehin, E.
name: Kaasalainen, M.
name: Kryszczynska, A.
name: Lamy, P.
name: Marchis, F.
name: Marciniak, A.
name: Michalowski, T.
name: Michel, P.
name: Pajuelo, M.
name: Podlewska-Gaca, E.
name: Rambaux, N.
name: Santana-Ros, T.
name: Storrs, A.
name: Tanga, P.
name: Vigan, A.
name: Warner, B.
name: Wieczorek, M.
name: Witasse, O.
name: Yang, B.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Dynamical models of Solar System evolution have suggested that P-/D-type volatile-rich asteroids formed in the outer Solar System and may be genetically related to the Jupiter Trojans, the comets and small KBOs. Indeed, their spectral properties resemble that of anhydrous cometary dust. High-angular-resolution images of P-type asteroid (87) Sylvia with VLT/SPHERE were used to reconstruct its 3D shape, and to study the dynamics of its two satellites. We also model Sylvia's thermal evolution. The shape of Sylvia appears flattened and elongated. We derive a volume-equivalent diameter of 271 +/- 5 km, and a low density of 1378 +/- 45 kg.m-3. The two satellites orbit Sylvia on circular, equatorial orbits. The oblateness of Sylvia should imply a detectable nodal precession which contrasts with the fully-Keplerian dynamics of the satellites. This reveals an inhomogeneous internal structure, suggesting that Sylvia is differentiated. Sylvia's low density and differentiated interior can be explained by partial melting and mass redistribution through water percolation. The outer shell would be composed of material similar to interplanetary dust particles (IDPs) and the core similar to aqueously altered IDPs or carbonaceous chondrite meteorites such as the Tagish Lake meteorite. Numerical simulations of the thermal evolution of Sylvia show that for a body of such size, partial melting was unavoidable due to the decay of long-lived radionuclides. In addition, we show that bodies as small as 130-150 km in diameter should have followed a similar thermal evolution, while smaller objects, such as comets and the KBO Arrokoth, must have remained pristine, in agreement with in situ observations of these bodies. NASA Lucy mission target (617) Patroclus (diameter~140 km) may, however, be differentiated.
description: Accepted for publication in A&A
Additional file 4: of Comparative mitogenomics supports synonymy of the genera Ligula and Digramma (Cestoda: Diphyllobothriidae)
Creators: name: Li, Wen
name: Fu, Pei
name: Zhang, Dong
name: Boyce, Kellyanne
name: Xi, Bing
name: Zou, Hong
name: Li, Ming
name: Wu, Shan
name: Wang, Gui
Publisher: name: figshare
Year: 2018
Subjects: subject: Biochemistry
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Physiology
subject: Evolutionary Biology
subject: Ecology
subject: Biological Sciences not elsewhere classified
subject: Developmental Biology

description: Figure S1. Relative Synonymous Codon Usage (RSCU) of Digramma interrupta and Ligula intestinalis. Codon families are labelled on the x-axis. Values on the top of the bars denote amino acid usage. (PDF 37 kb)