cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Scalable adaptive cubic regularization methods
Creators: name: Dussault, Jean-Pierre
name: Orban, Dominique
Publisher: name: arXiv
Year: 2021
Subjects: subject: Optimization and Control (math.OC)
subject: FOS: Mathematics
subject: 65F10, 65F22, 65F25, 65F35, 65F50, 90C06, 90C20, 90C30

description: Adaptive cubic regularization (ARC) methods for unconstrained optimization compute steps from linear systems involving a shifted Hessian in the spirit of the Levenberg-Marquardt and trust-region methods. The standard approach consists in performing an iterative search for the shift akin to solving the secular equation in trust-region methods. Such search requires computing the Cholesky factorization of a tentative shifted Hessian at each iteration, which limits the size of problems that can be reasonably considered. We propose a scalable implementation of ARC named ARCqK in which we solve a set of shifted systems concurrently by way of an appropriate modification of the Lanczos formulation of the conjugate gradient (CG) method. At each iteration of ARCqK to solve a problem with n variables, a range of m << n shift parameters is selected. The computational overhead in CG beyond the Lanczos process is thirteen scalar operations to update five vectors of length m and two n-vector updates for each value of the shift. The CG variant only requires one Hessian-vector product and one dot product per iteration, independently of the number of shift parameters. Solves corresponding to inadequate shift parameters are interrupted early. All shifted systems are solved inexactly. Such modest cost makes our implementation scalable and appropriate for large-scale problems. We provide a new analysis of the inexact ARC method including its worst case evaluation complexity, global and asymptotic convergence. We describe our implementation and provide preliminary numerical observations that confirm that for problems of size at least 100, our implementation of ARCqK is more efficient than a classic Steihaug-Toint trust region method. Finally, we generalize our convergence results to inexact Hessians and nonlinear least-squares problems.
description: 20 pages, 1 figure
Magnetically-induced ferroelectricity in orthorhombic manganites: microscopic origin and chemical trends
Creators: name: Yamauchi, Kunihiko
name: Freimuth, Frank
name: Blügel, Stefan
name: Picozzi, Silvia
Publisher: name: arXiv
Year: 2008
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The microscopic origin of the magnetically-driven ferroelectricity in collinear AFM-E orthorhombic manganites is explained by means of first-principles Wannier functions. We show that the polarization is mainly determined by the "asymmetric electron hopping" of orbitally-polarized Mn eg states, implicit in the peculiar in-plane zig-zag spin arrangement in the AFM-E configuration. In ortho-HoMnO3, Wannier function centers are largely displaced with respect to corresponding ionic positions, implying that the final polarization is strongly affected by a purely electronic contribution, at variance with standard ferroelectrics where the ionic-displacement is dominant. However, the final value of the polarization is the result of competing effects, as shown by the opposite signs of the contributions to the polarization coming from the Mn eg and t2g states. Furthermore, a systematic analysis of the link between ferroelectricity and the spin, orbital and lattice degrees of freedom in the manganite series has been carried out, in the aim of ascertaining chemical trends as a function of the rare-earth ion. Our results show that the Mn-O-Mn angle is the key quantity in determining the exchange coupling: upon decreasing the Mn-O-Mn angle, the first- (second-) nearest neighbor ferromagnetic (antiferromagnetic) interaction decreases (remains constant), in turn stabilizing either the AFM-A or the AFM-E spin configuration for weakly or strongly distorted manganites, respectively. The Mn eg contribution to the polarization dramatically increases with the Mn-O-Mn angle and decreases with the "long" Mn-O bond length, whereas the Mn t2g contribution decreases with the "short" Mn-O bond-length, partially cancelling the former term.
description: 11 pages, 10 figures. Submitted for publication
Biodiesel synthesis via heterogeneous catalysis: application of new material based on mixed oxides (Na-FeAlO) obtained from the microstructural transformation of red mud
Creators: name: de Jesus Moraes, Rosineide
name: Câmara, Marcos Valério Solino
name: da Gama, Valtiane de Jesus Pantoja
name: Rodrigues, Jocelia Silva Machado
name: da Silva, Jhemison Carmo
name: da Mota, Laura Beatriz Oliveira
name: de Souza Rocha, Eleane Monaliza
name: da Mota, Andréia de Andrade Mancio
name: de Castro, Douglas Alberto Rocha
name: Duvoisin, Sergio
name: Machado, Nélio Teixeira
name: da Mota, Silvio Alex Pereira
Publisher: name: Taylor & Francis
Year: 2024
Subjects: subject: Biochemistry
subject: Space Science
subject: Microbiology
subject: FOS: Biological sciences
subject: Biotechnology
subject: Environmental Sciences not elsewhere classified
subject: Chemical Sciences not elsewhere classified
subject: Ecology
subject: Biological Sciences not elsewhere classified
subject: Inorganic Chemistry
subject: FOS: Chemical sciences

description: This paper investigated the application of a new material based on mixed oxides (Na-FeAlO) as a catalyst, which was synthesized from red mud (RM) and sodium carbonate and named CLV98/900, in the production of fatty acid alkyl esters (FAAE) from waste cooking oil (WCO) via transesterification reaction. The synthesized catalysts were characterized by scanning electron microscopy (SEM), X-ray diffractometer (XRD), and Fourier transform infrared spectrometer (FTIR). The characterization of the catalyst indicated that the microstructural transformation of red mud into CLV98/900 efficiently obtained new crystallographic phases. The influence of several operational parameters, such as oil/alcohol molar ratio (1/15 – 1/45), temperature (65–75°C), percentage of catalyst (0–5%) and reaction time (60–180 min), was evaluated on the yield and conversion, resulting in yield values that ranged from 2% to 74%, 25% to 67.5%, 8% to 67.5% and 2% to 74%, respectively. In parallel, the conversion values ranged from 52% to 82%, 58% to 82%, 4% to 63% and 54% to 74%, respectively. The operational parameters fixed at an oil/ethanol molar ratio of 1/30, 70°C, 1% catalyst and 60 min provide the highest yield (82%) and conversion (82%). GC-MS analysis confirmed the formation of biodiesel. Therefore, CLV98/900 shows excellent potential as a catalyst for biodiesel production via WCO transesterification.
Thermoelectric phenomena in a quantum dot asymmetrically coupled to external leads
Creators: name: Krawiec, M.
name: Wysokinski, K. I.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We study thermoelectric phenomena in a system consisting of strongly correlated quantum dot coupled to external leads in the Kondo regime. We calculate linear and nonlinear electrical and thermal conductance and thermopower of the quantum dot and discuss the role of asymmetry in the couplings to external electrodes. In the linear regime electrical and thermal conductances are modified, while thermopower remains unchanged. In the nonlinear regime the Kondo resonance in differential conductance develops at non-zero source-drain voltage, which has important consequences on thermoelectric properties of the system and the thermopower starts to depend on the asymmetry. We also discuss Wiedemann-Franz relation, thermoelectric figure of merit and validity of the Mott formula for thermopower.
description: 6 pages, 7 figures
Field notes: Phonological analysis
Creators: name: Parker, Stephen
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2020
Subjects: subject: inp

description: This research was carried out by Steve Parker (Dallas International University; SIL International) under the auspices of SIL International. This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.

One PDF file. Organized data for studying segmental contrasts, allophones, tone, prosody, and phonotactics.
Binary Black Hole Accretion Flows in Merged Galactic Nuclei
Creators: name: Hayasaki, Kimitake
name: Mineshige, Shin
name: Sudou, Hiroshi
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We study the accretion flows from the circumbinary disks onto the supermassive binary black holes in a subparsec scale of the galactic center, using a smoothed particles hydrodynamics (SPH) code. Simulation models are presented in four cases of a circular binary with equal and unequal masses, and of an eccentric binary with equal and unequal masses. We find that the circumblack-hole disks are formed around each black holes regardless of simulation parameters. There are two-step mechanisms to cause an accretion flow from the circumbinary disk onto supermassive binary black holes: First, the tidally induced elongation of the circumbinary disk triggers mass inflow towards two closest points on the circumbinary disk from the black holes. Then, the gas is increasingly accumulated on these two points owing to the gravitational attraction of black holes. Second, when the gas can pass across the maximum loci of the effective binary potential, it starts to overflow via their two points and freely infalls to each black hole. In circular binaries, the gas continues to be supplied from the circumbinary disk (i.e. the gap between the circumbinary disk and the binary black hole is always closed.) In eccentric binaries, the mass supply undergoes the periodic on/off transitions during one orbital period because of the variation of periodic potential. The gap starts to close after the apastron and to open again after the next periastron passage. Due to this gap closing/opening cycles, the mass-capture rates are eventually strongly phase dependent. This could provide observable diagnosis for the presence of supermassive binary black holes in merged galactic nuclei.
description: 16 pages, 27 figures, 2 tables, accepted for publication in PASJ. "High Resolution Version is Available at "http://www2.yukawa.kyoto-u.ac.jp/~kimitake/bbhs.html" Three observational references are added. Grammatical errors and typos are corrected
Η επίδραση της ενδοαυλικής εντερικής χορήγησης οξυγονωμένου φθοριοάνθρακα στην οξεία ισχαιμία και επαναιμάτωση του εντέρου: (πειραματική μελέτη σε κονίκλους)
Creators: name: Ντίνας, Αχιλλέας Δ.
Publisher: name: Aristotle University of Thessaloniki
Year: 2008
Subjects: Γαλακτικό οξύ
Μαλονική διαλδεϋδη
Δισακχαριδάσεις εντερικού βλεννογόνου
Lactate
Mucosal dissacharidase activity

description: Ο σκοπός αυτής της μελέτης ήταν να εκτιμηθεί ο προστατευτικός ρόλος της χορήγησης του οξυγονωμένου φθοριοάνθρακα στον αυλό του εντέρου στη βιωσιμότητα του εντέρου σε ένα πειραματικό μοντέλο οξείας ισχαιμίας-επαναιμάτωσης. Χρησιμοποιήθηκαν 20 κόνικλοι ως πειραματόζωα, βάρους 2,5-3,5kg. Τα πειραματόζωα χωρίσθηκαν σε τέσσερις ομάδες με συμμετοχή σε κάθε ομάδα πέντε πειραματόζωων. Η επιβεβαίωση της πλήρους ισχαιμίας και της επαναιμάτωσης έγινε με έλεγχο Doppler. Η διάρκεια της ισχαιμίας ήταν 120 min και της επαναιμάτωσης 60 min. Σε όλα τα πειραματόζωα έγιναν αιμοληψίες και βιοψίες με την εισαγωγή στην αναισθησία στα 60 και 120 min μετά την πρόκληση της ισχαιμίας, καθώς και 30 και 60 min μετά την άρση της ισχαιμίας για τον ποσοτικό προσδιορισμό παραγόντων που συμμετέχουν στο σύνδρομο ισχαιμίας-επαναιμάτωσης. Οι παράγοντες που προσδιορίσθηκαν είναι οι παρακάτω: CPK, P, CRP, Ht, Hb, WBC, PLT. Επίσης, εκτιμήθηκε ένας σημαντικός δείκτης λιπιδικής υπεροξείδωσης με τη μέτρηση της μαλονικής δυαλδεΰδης (MDA), μετρήθηκαν τα επίπεδα του γαλακτικού οξέος στον ορό του αίματος και στο βλεννογόνο του εντέρου και η ενζυματική δράση των δισακχαριδασών του εντερικού βλεννογόνου (μαλτάσης και σουκράζης). Τέλος, πραγματοποιήθηκαν με οπτικό και ηλεκτρονικό μικροσκόπιο ολοτοιχωματικές βιοψίες λεπτού εντέρου για την τεκμηρίωση των βλαβών ισχαιμίας-επαναιμάτωσης
description: The aim of this study is to evaluate the potential protective effect of intraluminal intestinal administration of oxygenated perfluorocarbons (PFC) on the enteric viability in an experimental model of acute ischemia-reperfusion (I/R). Twenty rabbits (White New Zealand, mean weight 2.500±3.500g) were divided randomly into four groups. Mesenteric ischemia was verified by Doppler examination, inspection of pale discoloration of the intestine and loss of pulses of the mesenteric circulation. The duration of ischemia was 120 min, followed by 60 min of reperfusion. Venous blood samples and antimesenteric wedge intestinal biopsies were taken at time 0, 60 min, 120 min (ischemia period), 150 min and 180 min, in order to determine quantitatively parameters involved in the ischemia/reperfusion syndrome. The parameters that were determined are the following: CPK, P, CRP, Ht, Hb, WBC, PLT. Were also measured the MDA (malondialdeyde) levels of the small bowel tissue, the levels of lactate levels in the blood and the enteric tissue. Finally, the IR injury was assessed by changes in mucosal integrity and brush border disaccharidase activities. Small bowel tissue samples were taken for light and electron microscope study
Injective Objects and Fibered Codensity Liftings
Creators: name: Komorida, Yuichi
Publisher: name: arXiv
Year: 2021
Subjects: subject: Logic in Computer Science (cs.LO)
subject: FOS: Computer and information sciences

description: Functor lifting along a fibration is used for several different purposes in computer science. In the theory of coalgebras, it is used to define coinductive predicates, such as simulation preorder and bisimilarity. Codensity lifting is a scheme to obtain a functor lifting along a fibration. It generalizes a few previous lifting schemes including the Kantorovich lifting. In this paper, we seek a property of functor lifting called fiberedness. Hinted by a known result for Kantorovich lifting, we identify a sufficient condition for a codensity lifting to be fibered. We see that this condition applies to many examples that have been studied. As an application, we derive some results on bisimilarity-like notions.
description: 21 pages, presented in International Workshop on Coalgebraic Methods in Computer Science (CMCS) 2020
Neutralino Dark Matter in the NMSSM
Creators: name: Lopez-Fogliani, D. E.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We analyze the direct detection of neutralino dark matter in the framework of the Next-to-Minimal Supersymmetric Standard Model. Taking into account all the available constraints from LEPII and Tevatron, including bounds from the muon anomalous magnetic moment and flavor constraint as $b \to s γ$, we compute the neutralino-nucleon cross section and compare the results with the sensitivity of dark matter detectors. We also study the relic abundance of neutralinos, comparing it with WMAP observations. We show that a light singlet-like Higgs can escape accelerator constraints allowing for scenarios with large cross sections, and a very interesting phenomenology.
description: 6 pages, 6 figures, talk given at IRGAC2006, Barcelona, July 11-15, 2006, to appear in J. Phys. A
ความสามารถในการทำงานของข้อเข่าในผู้ป่วยข้อเข่าเสื่อมรุนแรง
Creators: name: วันทนียา วัชรีอุดมกาล
name: อารีรัตน์ สุพุทธิธาดา
name: อารี ตนวาลี
Publisher: name: ราชวิทยาลัยแพทย์เวชศาสตร์ฟื้นฟู แห่งประเทศไทย
Year: 2557
Subjects: ข้อมูล, ข้อเข่าเสื่อมรุนแรง, ความสามารถในการทำงานของข้อเข่า,

description: 1, 24, เวชศาสตร์ฟื้นฟูสาร
คลื่นไฟฟ้าของกล้ามเนื้อ Vastus Medialis ขณะออกแรงในตำแหน่งของขาที่ต่างกัน
Creators: name: พัฒน์ สวรรค์พิทักษ์
name: วารี จิรอดิศัย
Publisher: name: ราชวิทยาลัยแพทย์เวชศาสตร์ฟื้นฟู แห่งประเทศไทย
Year: 2557
Subjects: กล้ามเนื้อ vastus medialis, การออกกำลังกายแบบ closed kineticchain, การออกกำลังกายแบบ open kinetic chain, คลื่นไฟฟ้ากล้ามเนื้อ,

description: 1, 24, เวชศาสตร์ฟื้นฟูสาร
Stellar Metallicities from SkyMapper Photometry II: Precise photometric metallicities of $\sim$280,000 giant stars with [Fe/H] $< -0.75$ in the Milky Way
Creators: name: Chiti, Anirudh
name: Frebel, Anna
name: Mardini, Mohammad K.
name: Daniel, Tatsuya W.
name: Ou, Xiaowei
name: Uvarova, Anastasiia V.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The Milky Way's metal-poor stars are nearby ancient objects that are used to study early chemical evolution and the assembly and structure of the Milky Way. Here we present reliable metallicities of $\sim280,000$ stars with $-3.75 \lesssim$ [Fe/H] $\lesssim -0.75$ down to $g=17$ derived using metallicity-sensitive photometry from the second data release (DR2) of the SkyMapper Southern Survey. We use the dependency of the flux through the SkyMapper $v$ filter on the strength of the Ca II K absorption features, in tandem with SkyMapper $u,g,i$ photometry, to derive photometric metallicities for these stars. We find that metallicities derived in this way compare well to metallicities derived in large-scale spectroscopic surveys, and use such comparisons to calibrate and quantify systematics as a function of location, reddening, and color. We find good agreement with metallicities from the APOGEE, LAMOST, and GALAH surveys, based on a standard deviation of $σ\sim0.25$dex of the residuals of our photometric metallicities with respect to metallicities from those surveys. We also compare our derived photometric metallicities to metallicities presented in a number of high-resolution spectroscopic studies to validate the low metallicity end ([Fe/H] $< -2.5$) of our photometric metallicity determinations. In such comparisons, we find the metallicities of stars with photometric [Fe/H] $< -2.5$ in our catalog show no significant offset and a scatter of $σ\sim$0.31dex level relative to those in high-resolution work when considering the cooler stars ($g-i > 0.65$) in our sample. We also present an expanded catalog containing photometric metallicities of $\sim720,000$ stars as a data table for further exploration of the metal-poor Milky Way.
description: 15 pages, 9 figures, 2 tables; submitted to ApJS and revised after one round of referee feedback. Full version of Table 2 in source
Numerical simulation of wave grouping effects on moored structures
Creators: name: Pemmireddy, Venkata Rami Reddy
Publisher: name: University of British Columbia
Year: 2008

description: The present thesis investigates wave grouping effects on the low-frequency drift force and the low-frequency surge response of a moored structure. The smoothed instantaneous wave energy history, SIWEH, which may be characterized by a number of parameters, is considered as an acceptable approach to describe wave groupiness. A numerical simulation of wave records is carried out for a specified wave spectral density and SIWEH incorporating various wave grouping parameters. The low-frequency drift force and the surge response of a large moored circular cylinder, modeled as a single degree of freedom system, is estimated on the basis of Pinkster's approximate method, which involves the use of computed drift force coefficients. Results show that the wave grouping parameters have a significant effect on the low-frequency drift force and surge response. It is also observed that the low-frequency drift force can be related to the SIWEH in terms of a transfer function. A statistical analysis of simulated low-frequency surge motions is performed, and the calculated extreme response is compared with the predictions of three theoretical models, namely the Gaussian, Exponential, and three-parameter methods. If the surge response has a non- Gaussian distribution, Stansberg's three-parameter model predicts extreme amplitudes reasonably well. The low-frequency drift force on a slender fixed circular cylinder is calculated using both Pinkster's approximate method and in the time domain using the Morison equation. Pinkster's approximate method underestimates the force, but it is computationally more efficient. The time domain approach is also used to estimate the low-frequency drift force on a moored slender circular cylinder and the results are compared to those for a fixed cylinder. It is observed that cylinder motion tends to reduce the drift force significantly.
การศึกษาประสิทธิผลของการฝังเข็ม 1 ครั้งทุก 2 สัปดาห์เพื่อบำบัดอาการปวดในผู้ป่วยโรคข้อเข่าเสื่อม
Creators: name: วิภาวดี ลิ้มภักดี
name: ชนินทร์ ลีวานันท์
name: วิไล คุปต์นิรัติศัยกุล
Publisher: name: ราชวิทยาลัยแพทย์เวชศาสตร์ฟื้นฟู แห่งประเทศไทย
Year: 2557
Subjects: WOMAC ฉบับภาษาไทย, กายบริหารกล้ามเนื้อเหยียดข้อเข่า, การฝังเข็ม, อาการปวด, โรคข้อเข่าเสื่อม,

description: 1, 24, เวชศาสตร์ฟื้นฟูสาร
Jupiter's "Cold" Formation in the Protosolar Disk Shadow: An Explanation for the Planet's Uniformly Enriched Atmosphere
Creators: name: Ohno, Kazumasa
name: Ueda, Takahiro
Publisher: name: arXiv
Year: 2021
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Atmospheric compositions offer valuable clues to planetary formation and evolution. Jupiter has been the most well-studied giant planet in terms of its atmosphere; however, the origin of the Jovian atmospheric composition remains a puzzle as the abundances of nitrogen and noble gases as high as those of other elements could only originate from extremely cold environments. We propose a novel idea for explaining the Jovian atmospheric composition: Dust pileup at the H$_2$O snow line casts a shadow and cools the Jupiter orbit so that N$_2$ and noble gases can freeze. Planetesimals or a core formed in the shadowed region can enrich nitrogen and noble gases as much as other elements through their dissolution in the envelope. We compute the temperature structure of a shadowed protosolar disk with radiative transfer calculations. Then, we investigate the radial volatile distributions and predict the atmospheric composition of Jupiter with condensation calculations. We find that the vicinity of the current Jupiter orbit, approximately $3$--$7~{\rm AU}$, could be as cold as $30~{\rm K}$ if the small-dust surface density varies by a factor of $\gtrsim30$ across the H$_2$O snow line. According to previous grain growth simulations, this condition could be achieved by weak disk turbulence if silicate grains are more fragile than icy grains. The shadow can cause the condensation of most volatile substances, namely N$_2$ and Ar. We demonstrate that the dissolution of shadowed solids can explain the elemental abundance patterns of the Jovian atmosphere even if proto-Jupiter was formed near Jupiter's current orbit. The disk shadow may play a vital role in controlling atmospheric compositions. The effect of the shadow also impacts the interpretation of upcoming observations of exoplanetary atmospheres by JWST.
description: Accepted for publication in A&A Letters (9 pages, 6 figures, 2 tables)
Transitions between turbulent and laminar superfluid vorticity states in the outer core of a neutron star
Creators: name: Peralta, C.
name: Melatos, A.
name: Giacobello, M.
name: Ooi, A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We investigate the global transition from a turbulent state of superfluid vorticity to a laminar state, and vice versa, in the outer core of a neutron star. By solving numerically the hydrodynamic Hall-Vinen-Bekarevich-Khalatnikov equations for a rotating superfluid in a differentially rotating spherical shell, we find that the meridional counterflow driven by Ekman pumping exceeds the Donnelly-Glaberson threshold throughout most of the outer core, exciting unstable Kelvin waves which disrupt the rectilinear vortex array, creating a vortex tangle. In the turbulent state, the torque exerted on the crust oscillates, and the crust-core coupling is weaker than in the laminar state. This leads to a new scenario for the rotational glitches observed in radio pulsars: a vortex tangle is sustained in the differentially rotating outer core by the meridional counterflow, a sudden spin-up event brings the crust and core into corotation, the vortex tangle relaxes back to a rectilinear vortex array, then the crust spins down electromagnetically until enough meridional counterflow builds up to reform a vortex tangle. The turbulent-laminar transition can occur uniformly or in patches; the associated time-scales are estimated from vortex filament theory. We calculate numerically the global structure of the flow with and without an inviscid superfluid component, for Hall-Vinen and Gorter-Mellink forms of the mutual friction. We also calculate the post-glitch evolution of the angular velocity of the crust and its time derivative, and compare the results with radio pulse timing data, predicting a correlation between glitch activity and Reynolds number.
description: (1) School of Physics, University of Melbourne, Parkville, VIC 3010, Australia. (2) Departamento de Fisica, Escuela de Ciencias,Universidad de Oriente, Cumana, Venezuela, (3) Department of Mechanical and Manufacturing Engineering, University of Melbourne, Parkville, VIC 3010, Australia. Accepted for publication in The Astrophysical Journal. 30 pages, 9 figures (in jpg format)
Correlation functions of the one-dimensional attractive Bose gas
Creators: name: Calabrese, P.
name: Caux, J. -S.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The zero-temperature correlation functions of the one-dimensional attractive Bose gas with delta-function interaction are calculated analytically for any value of the interaction parameter and number of particles, directly from the integrability of the model. We point out a number of interesting features, including zero recoil energy for large number of particles, analogous to a Mössbauer effect.
description: 4 pages, 2 figures
Non-Existence and Existence of Shock Profiles in the Bemfica-Disconzi-Noronha Model
Creators: name: Freistuhler, Heinrich
Publisher: name: arXiv
Year: 2021
Subjects: subject: Analysis of PDEs (math.AP)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: This note studies a four-field hyperbolic PDE model that was recently introduced by Bemfica, Disconzi, and Noronha for the pure radiation fluid with viscosity, and asks whether shock waves admit continuous profiles in this description. The model containing two free parameters mu, nu and being causal whenever one chooses (mu,nu) from a certain range C subset R2, this paper shows that for any choice of (mu,nu) in the interior of C, there is a dichotomy in so far as (i) shocks of sufficiently small amplitude admit profiles and (ii) certain other, thus necessarily non-small, shocks do not. This finding does not preclude the possibility that if one chooses (mu,nu) from a specific part S of the boundary of C, the dichotomy disappears and all shocks have profiles; the parameter set S corresponds to the "sharply causal" case, in which one of the characteristic speeds of the dissipation operator is the speed of light.
description: 1 figure
Order-Optimal Data Aggregation in Wireless Sensor Networks - Part I: Regular Networks
Creators: name: Barton, Richard J.
name: Zheng, Rong
Publisher: name: arXiv
Year: 2006
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: The predominate traffic patterns in a wireless sensor network are many-to-one and one-to-many communication. Hence, the performance of wireless sensor networks is characterized by the rate at which data can be disseminated from or aggregated to a data sink. In this paper, we consider the data aggregation problem. We demonstrate that a data aggregation rate of O(log(n)/n) is optimal and that this rate can be achieved in wireless sensor networks using a generalization of cooperative beamforming called cooperative time-reversal communication.
Εκπαίδευση βασισμένη στο διαδίκτυο με χρήση προσαρμοστικών συστημάτων υπερμέσων
Creators: name: Φιλιππίδης, Σταύρος Κ.
Publisher: name: Aristotle University of Thessaloniki
Year: 2008
Subjects: Προσαρμοστικά υπερμέσα
Προσαρμοστική χρήση βίντεο
Μαθησιακά στυλ
Adaptive hypermedia
Adaptive use of video
Adaptive use of images
Learning styles

description: Αντικείμενο έρευνας της διατριβής είναι οι δυνατότητες που παρέχουν τα προσαρμοζόμενα και προσαρμοστικά συστήματα υπερμέσων στην εκπαίδευση. Καταγράφηκαν ερευνητικά ερωτήματα σχετικά με την προσαρμογή των βίντεο και εικόνων εκμάθησης. Μελετήθηκε η αποδοχή από τους εκπαιδευόμενους συστημάτων που χρησιμοποιούν βίντεο εκμάθησης, προσαρμοζόμενο βίντεο εκμάθησης, προσαρμοζόμενες εικόνες εκμάθησης και προσαρμοστικές εικόνες εκμάθησης με προσαρμογή με βάση τη διάσταση ακολουθιακός/ολιστικός του μοντέλου μαθησιακών στυλ των Felder-Silverman. Χρησιμοποιήθηκαν τα ερωτηματολόγια USE και ILS. Σε όλες τις περιπτώσεις προσαρμογής οι μαθητές βρήκαν τη μέθοδο χρήσιμη, εύχρηστη, εύκολη στη μάθηση και ικανοποιητική σε ποσοστά αποδοχής μεγαλύτερα του 69%. Η χρήση της προσαρμογής δίνει καλύτερα αποτελέσματα. Προκύπτουν αρκετά συμπεράσματα για τη σχεδίαση εκπαιδευτικών συστημάτων βασισμένων στο διαδίκτυο με χρήση προσαρμοστικών συστημάτων υπερμέσων
description: Object of the research is the capability of adaptable and adaptive hypermedia systems in education. Research questions include the adaptation of videos and images for learning. Students' acceptance of educational systems that use instructional video, adaptable instructional video, adaptable instructional images and adaptive instructional images using adaptation based on the sequential/global dimension of the Felder-Silverman learning style theory was studied. USE and ILS questionnaires were used. In all cases of adaptation, students found the method useful, easy to use, easy to learn and satisfying in rates of acceptance higher than 69%. The use of adaptation gives better results. Results of these studies can be used in the design of educational internet-based systems using adaptive hypermedia systems
A General Deep Learning framework for Neuron Instance Segmentation based on Efficient UNet and Morphological Post-processing
Creators: name: Wu, Huaqian
name: Souedet, Nicolas
name: Jan, Caroline
name: Clouchoux, Cédric
name: Delzescaux, Thierry
Publisher: name: arXiv
Year: 2022
Subjects: subject: Image and Video Processing (eess.IV)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: Recent studies have demonstrated the superiority of deep learning in medical image analysis, especially in cell instance segmentation, a fundamental step for many biological studies. However, the excellent performance of the neural networks requires training on large, unbiased dataset and annotations, which is labor-intensive and expertise-demanding. This paper presents an end-to-end framework to automatically detect and segment NeuN stained neuronal cells on histological images using only point annotations. Unlike traditional nuclei segmentation with point annotation, we propose using point annotation and binary segmentation to synthesize pixel-level annotations. The synthetic masks are used as the ground truth to train the neural network, a U-Net-like architecture with a state-of-the-art network, EfficientNet, as the encoder. Validation results show the superiority of our model compared to other recent methods. In addition, we investigated multiple post-processing schemes and proposed an original strategy to convert the probability map into segmented instances using ultimate erosion and dynamic reconstruction. This approach is easy to configure and outperforms other classical post-processing techniques. This work aims to develop a robust and efficient framework for analyzing neurons using optical microscopic data, which can be used in preclinical biological studies and, more specifically, in the context of neurodegenerative diseases.
Weak Mixing and Rare Decays in the Littlest Higgs Model
Creators: name: Bardeen, William A.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Little Higgs Models have been introduced to resolve the fine-tuning problems associated with the stability of the electroweak scale and the constraints imposed by the precision electroweak analysis of experiments testing the Standard Model of particle physics. Flavor physics provides a sensitive probe of the new physics contained in these models at next-to-leading order.
description: Talk presented at the 2006 International Workshop on The Origin of Mass and Strong Coupling Gauge Theories held November 21-24, 2006 at Nagoya, Japan. 7 pages
Volunteer Rugby Coaches in Regional Queensland: the significance of lived experience on their coaching philosophies, practices and overall development
Creators: name: Robinson, Dave
Publisher: name: University of Southern Queensland
Year: 2022
Subjects: regional sport, coaches, volunteers, rugby union

description: The purpose of this research was to explore the complex role of volunteer rugby union coaches working in regional Queensland communities. Organised sport is an important contributor to regional communities with the volunteer coach having a vital role in contributing to the overall connectedness and health of these areas.

The research focused on five volunteer rugby union coaches with significant experience of living and coaching in regional Queensland and analysed how their lived experience informs their coaching philosophy, practice, and professional development. This associated exploration of their values, contexts, needs, and motivations offered valuable insights into how their role can be further supported and strengthened to improve outcomes for their regional communities, their sport's governing bodies, coach educators, and the coaches themselves.

Interpretative Phenomenological Analysis (IPA) was the methodological approach employed for this study. Its idiographic focus enabled the identification and subsequent analysis of the complexity of the coaching roles adopted by the participants. The interpretative analysis revealed five overarching superordinate themes: the formative development of personal qualities conducive to coaching, the significance of sport, the uniqueness of rugby, effective coaching pedagogy, and the challenges and rewards of coaching regional rugby.

This research proposes a number of recommendations for consideration by rugby's governing bodies including increased user-friendly or user-specified educational opportunities for volunteers; more locally-based regional development personnel with a particular focus on school contexts; and greater education and awareness regarding volunteer coaches' well-being. Underpinning these recommendations is an emphasis on the importance of seeking out and listening to the perspectives of volunteer coaches in regional areas.
Photoassociation of a Bose-Einstein Condensate near a Feshbach Resonance
Creators: name: Junker, M.
name: Dries, D.
name: Welford, C.
name: Hitchcock, J.
name: Chen, Y. P.
name: Hulet, R. G.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We measure the effect of a magnetic Feshbach resonance (FR) on the rate and light-induced frequency shift of a photoassociation resonance in ultracold $^7$Li. The photoassociation-induced loss rate coefficient, $K_p$, depends strongly on magnetic field, varying by more than a factor of 10$^4$ for fields near the FR. At sufficiently high laser intensities, $K_p$ for a thermal gas decreases with increasing intensity, while saturation is observed for the first time in a Bose-Einstein condensate. The frequency shift is also strongly field-dependent and exhibits an anomalous blue-shift for fields just below the FR.
description: 4 pages, 4 figures. v2: updated comparison with theory; added references; added tick marks to Fig. 1 inset. To be published in Phys. Rev. Letters
Vibration of lightweight wooden floors : experimental and analytical evaluation
Creators: name: Neumann, Greg A.
Publisher: name: University of British Columbia
Year: 2009

description: An experimental study of two lightweight wooden floors’ dynamic response was per formed. The objective of this study was to evaluate the applicability of the computer programs, NAFFAP and DYFAP, for the case of lightweight wooden floor vibration. The program NAFFAP solves for the floor system’s natural frequencies and mode shapes while DYFAP performs a time domain integration of the equations of motion in response to a specified loading on the floor. DYFAP also has the capacity to model the coupled response of oscillators upon the floor system. These programs employ a T—beam finite strip analysis. The test data of the floors’ dynamic response to various impacts were compared with the programs’ simulations. One floor used 2x8 sawn lumber joists while the other used composite wood I—Joists. The transient dynamic response of the two floors to three types of excitation were recorded. The three types of excitation were created by a hammer tap, releasing a sand filled bag and a standard human heel drop. The modelling of a human occupant with a single degree of freedom oscillator, the International Standards Organization’s two degree of freedom oscillator model and a forcing function were investigated with DYFAP. The oscillators were composed of lumped masses, springs and viscous dashpots. The program NAFFAP was sufficiently successful in predicting the floors’ natural frequencies. The floor parameters that were used with NAFFAP were then used with DYFAP to produce displacement time histories that compared well with the test data. DYFAP’s modelling of occupants with simple oscillators rather than a forcing function proved to be appropriate.
Ανάπτυξη ενοποιημένων τεχνικών διαχείρισης και επεξεργασίας βιολογικών δεδομένων με εφαρμογές στη μελέτη της γονιδιακής έκφρασης
Creators: name: Μαλούση, Αντιγόνη Δ.
Publisher: name: Aristotle University of Thessaloniki
Year: 2008
Subjects: Ενοποίηση εργαλείων
Μηχανική μάθηση
Εναλλακτικό μάτισμα
Machine learning
Alternative splicing
Tool integration

description: Το αντικείμενο της διατριβής είναι η ανάπτυξη τεχνικών ενοποίησης διαδικτυακών εργαλείων και επεξεργασίας βιολογικών δεδομένων με σκοπό την αντιμετώπιση των προβλημάτων υπολογιστικής πρόβλεψης γονιδιακών δομών. Η αρχιτεκτονική ενοποίησης που αναπτύχθηκε για το σκοπό αυτό υποστηρίζει τη διαφανή χρήση διαδικτυακών εργαλείων που επιτελούν κοινές λειτουργίες με δυνατότητα περαιτέρω διαχείρισης των αποτελεσμάτων που εξάγουν. Η αρχιτεκτονική αυτή εφαρμόστηκε σε ένα σύνολο εργαλείων πρόβλεψης γονιδιακών δομών και σηματοδοτικών στοιχείων, όπως οι θέσεις ματίσματος που καθορίζουν σε μεγάλο βαθμό τη γονιδιακή σύνθεση. Για τις θέσεις ματίσματος αναπτύχθηκε επίσης μια υβριδική τεχνική πρόβλεψης που χρησιμοποιεί μια γκαουσιανή μηχανή διανυσμάτων υποστήριξης για την εκπαίδευση των στατιστικών ιδιοτήτων των αλληλουχιών και δένδρων απόφασης για την ταξινόμησή τους βάσει προεπιλεγμένων μοτίβων που προέκυψαν από σχετικές δημοσιευμένες μελέτες. Τέλος, με δεδομένη την αυξημένη συχνότητα των εναλλακτικών μορφών ματίσματος στο γονιδίωμα του ανθρώπου εφαρμόστηκαν τεχνικές ανάλυσης των εγγενών χαρακτηριστικών και των υπερεκφραζόμενων μοτίβων των εξονικών περιοχών καθώς και συσχέτισης της μεθυλίωσης στις παρακείμενες ιντρονικές περιοχές με τον υποκείμενο μηχανισμό του εναλλακτικού ματίσματος
description: The main objective of this thesis is the development of integrated methods for managing and processing biological data with specific emphasis on their application to computational prediction of gene structures. The integration architecture developed in this thesis offers transparent access to publicly available tools that fulfill common functions, enabling comparative post-analysis of their outcomes. The applicability of the architecture was evaluated on a set of ab-inition gene predictors as well as on different signal detectors including splice sites that heavily define gene structures. This thesis proposes a hybrid method for predicting splice sites that uses a Gaussian support vector machine that is trained on probabilistic data descriptions and decision trees that are induced by combing different evidence from predefined published motifs. Finally, given that alternative splicing is very frequent in human genome the theses proposed different methods for the analysis of the intrinsic features and over-represented motifs of the exonic regions involved in alternative slpicing events as well as for the association of methylation within the adjacent intronic regions with the underlying alternative splicing mechanism
description: Διατμηματικό Πρόγραμμα Μεταπτυχιακών Σπουδών: Ιατρική Πληροφορική
ALMA Lensing Cluster Survey: A spectral stacking analysis of [CII] in lensed $z\sim6$ galaxies
Creators: name: Jolly, Jean-Baptiste
name: Knudsen, Kirsten
name: Laporte, Nicolas
name: Richard, Johan
name: Fujimoto, Seiji
name: Kohno, Kotaro
name: Ao, Yiping
name: Bauer, Franz E.
name: Egami, Eiichi
name: Espada, Daniel
name: Dessauges-Zavadsky, Miroslava
name: Magdis, Georgios
name: Schaerer, Daniel
name: Sun, Fengwu
name: Valentino, Francesco
name: Wang, Wei-Hao
name: Zitrin, Adi
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The properties of galaxies at redshift $z>6$ hold the key to our understanding of the early stages of galaxy evolution and can potentially identify the sources of the ultraviolet radiation that give rise to the epoch of reionisation. The far-infrared cooling line of [CII] at 158$μ$m is known to be bright and correlate with the star formation rate (SFR) of low-redshift galaxies, and hence is also suggested to be an important tracer of star formation and interstellar medium properties for very high-redshift galaxies. With the aim to study the interstellar medium properties of gravitationally lensed galaxies at $z>6$, we search for [CII] and thermal dust emission in a sample of 52 $z\sim6$ galaxies observed by the ALMA Lensing Cluster Survey (ALCS). We perform our analysis using \textsc{LineStacker}, stacking both [CII] and continuum emission. The target sample is selected from multiple catalogues, and the sample galaxies have spectroscopic redshift or low-uncertainty photometric redshifts ($σ_z < 0.02$) in nine galaxy clusters. Source properties of the target galaxies are either extracted from the literature or computed using spectral energy distribution (SED) fitting. Both weighted-average and median stacking are used, on both the full sample and three sub-samples. Our analyses find no detection of either [CII] or continuum. An upper limit on $L_{\rm [CII]}$ is derived, implying that [CII] remains marginally consistent for low-SFR $z>6$ galaxies but likely is under-luminous compared to the local $L_{\rm [CII]}$-SFR relationship. We discuss potential biases and possible physical effects that may be the cause of the non-detection. Further, the upper limit on the dust continuum implies that less than half of the star formation is obscured.
Field notes: Noun phrases
Creators: name: Trigoso Silvano, Jorge
name: Parker, Stephen
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2020
Subjects: subject: inp

description: This research was carried out by Steve Parker (Dallas International University; SIL International) under the auspices of SIL International. This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.

One PDF file. Noun paradigms, including the genitive construction.
Rapidly-Declining Hostless Type Ia Supernova KSP-OT-201509b from the KMTNet Supernova Program: Transitional Nature and Constraint on $^{56}$Ni Distribution and Progenitor Type
Creators: name: Moon, Dae-Sik
name: Ni, Yuan Qi
name: Drout, Maria R.
name: González-Gaitán, Santiago
name: Afsariardchi, Niloufar
name: Park, Hong Soo
name: Lee, Youngdae
name: Kim, Sang Chul
name: Antoniadis, John
name: Kim, Dong-Jin
name: Lee, Yongseok
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We report the early discovery and multi-color ($BVI$) high-cadence light curve analyses of a rapidly-declining sub-Chandrasekhar Type Ia supernova KSP-OT-201509b (= AT2015cx) from the KMTNet Supernova Program. The Phillips parameter and color stretch parameter of KSP-OT-201509b (= AT2015cx) are $Δ$$M_{B,15}$ $\simeq$ 1.62 mag and $s_{BV}$ $\simeq$ 0.54, respectively, at an inferred redshift of 0.072. These, together with other measured parameters (such as the strength of the secondary $I$-band peak, colors and luminosity), identify the source to be a rapidly-declining Type Ia of transitional nature that is closer to Branch Normal than 91bg-like. Its early light curve evolution and bolometric luminosity are consistent with those of homologously expanding ejecta powered by radioactive decay and a Type Ia SN explosion with 0.32 $\pm$ 0.01 $M_{\odot}$ of synthesized $^{56}$Ni mass, 0.84 $\pm$ 0.12 $M_{\odot}$ of ejecta mass and (0.61 $\pm$ 0.14) $\times$ 10$^{51}$ erg of ejecta kinetic energy. While its $B-V$ and $V-I$ colors evolve largely synchronously with the changes in the $I$-band light curve as found in other supernovae, we also find the presence of an early redward evolution in $V-I$ prior to --10 days since peak. The bolometric light curve of the source is compatible with a stratified $^{56}$Ni distribution extended to shallow layers of the exploding progenitor. Comparisons between the observed light curves and those predicted from ejecta-companion interactions clearly disfavor Roche Lobe-filling companion stars at large separation distances, thus supporting a double-degenerate scenario for its origin. The lack of any apparent host galaxy in our deep stack images reaching a sensitivity limit of $\sim$ 28 $\rm mag\;arcsec^{-2}$ makes KSP-OT-201509b a hostless Type Ia supernova and offers new insights into supernova host galaxy environments.
description: 39 pages, 20 figures, To appear in ApJ
Field notes: Text transcriptions
Creators: name: Trigoso Silvano, Jorge
name: Parker, Stephen
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2020
Subjects: subject: inp

description: This research was carried out by Steve Parker (Dallas International University; SIL International) under the auspices of SIL International. This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.

One PDF file. Written transcription of four brief recorded stories, spoken live by Jorge Trigoso. Americanist transcription of Iñapari, with interlinear glosses and free translations in Spanish.