cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
First Law of Black Saturn Thermodynamics
Creators: name: Rogatko, Marek
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The physical version and equilibrium state version of the first law of thermodynamics for a black object consisting of n-dimensional charged stationary axisymmetric black hole surrounded by $a$ black rings, the so-called black Saturn was derived. The general setting for our derivation is n-dimensional dilaton gravity with p + 1 strength form fields.
description: 9 pages, RevTex, to be published in Phys.Rev.D15
Time-distance helioseismology: Sensitivity of f-mode travel times to flows
Creators: name: Jackiewicz, J.
name: Gizon, L.
name: Birch, A. C.
name: Duvall, T. L.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Time-distance helioseismology has shown that f-mode travel times contain information about horizontal flows in the Sun. The purpose of this study is to provide a simple interpretation of these travel times. We study the interaction of surface-gravity waves with horizontal flows in an incompressible, plane-parallel solar atmosphere. We show that for uniform flows less than roughly 250 m s$^{-1}$, the travel-time shifts are linear in the flow amplitude. For stronger flows, perturbation theory up to third order is needed to model waveforms. The case of small-amplitude spatially-varying flows is treated using the first-order Born approximation. We derive two-dimensional Fréchet kernels that give the sensitivity of travel-time shifts to local flows. We show that the effect of flows on travel times depends on wave damping and on the direction from which the observations are made. The main physical effect is the advection of the waves by the flow rather than the advection of wave sources or the effect of flows on wave damping. We compare the two-dimensional sensitivity kernels with simplified three-dimensional kernels that only account for wave advection and assume a vertical line of sight. We find that the three-dimensional f-mode kernels approximately separate in the horizontal and vertical coordinates, with the horizontal variations given by the simplified two-dimensional kernels. This consistency between quite different models gives us confidence in the usefulness of these kernels for interpreting quiet-Sun observations.
description: 34 pages, accepted to Astrophysical Journal
QCD sum rules study of the $J^{PC}=1^{--}$ charmonium $Y$ mesons
Creators: name: Albuquerque, R. M.
name: Nielsen, M.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We use QCD sum rules to test the nature of the recently observed mesons Y(4260), Y(4350) and Y(4660), assumed to be exotic four-quark $(c\bar{c}q\bar{q})$ or $(c\bar{c}s\bar{s})$ states with $J^{PC}=1^{--}$. We work at leading order in $α_s$, consider the contributions of higher dimension condensates and keep terms which are linear in the strange quark mass $m_s$. We find for the $(c\bar{c}s\bar{s})$ state a mass $m_Y=(4.65\pm 0.10)$ GeV which is compatible with the experimental candidate Y(4660), while for the $(c\bar{c}q\bar{q})$ state we find a mass $m_Y=(4.49\pm 0.11)$ GeV, which is higger than the mass of the experimental candidate Y(4350). With the tetraquark structure we are working we can not explain the Y(4260) as a tetraquark state. We also consider molecular $D_{s0}\bar{D}_s^*$ and $D_{0}\bar{D}^*$ states. For the $D_{s0}\bar{D}_s^*$ molecular state we get $m_{D_{s0}\bar{D}_s^*}=(4.42\pm 0.10)$ GeV which is consistent, considering the errors, with the mass of the meson Y(4350) and for the $D_{0}\bar{D}^*$ molecular state we get $m_{D_{0}\bar{D}^*}=(4.27\pm 0.10)$ GeV in excelent agreement with the mass of the meson Y(4260).
description: 10 pages, 9 figures
Reservoir crowding in a totally asymmetric simple exclusion process with Langmuir Kinetics
Creators: name: Pal, Bipasha
name: Gupta, Arvind Kumar
Publisher: name: arXiv
Year: 2021
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We study a totally asymmetric simple exclusion process equipped with Langmuir kinetics with boundaries connected to a common reservoir. The total number of particles in the system is conserved and controlled by filling factor $μ$. Additionally, crowding of reservoir is taken into account which regulates the entry and exit of particles from both boundary as well as bulk. In the framework of mean-field approximation, we express the density profiles in terms of Lambert-W functions and obtain phase diagrams in $α-β$ parameter space. Further, we elucidate the variation of phase diagram with respect to filling factor and Langmuir kinetics. In particular, the topology of the phase diagram is found to change in the vicinity of $μ=1$. Moreover, the interplay between reservoir crowding and Langmuir kinetics develops a novel feature in the form of back-and-forth transition. The theoretical phase boundaries and density profiles are validated through extensive Monte Carlo simulations.% We performed Monte Carlo simulations to validate our theoretical findings.
Virtual Transmission Method, A New Distributed Algorithm to Solve Sparse Linear System
Creators: name: Wei, Fei
name: Yang, Huazhong
Publisher: name: arXiv
Year: 2008
Subjects: subject: Numerical Analysis (math.NA)
subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences
subject: G.1.0; B.7.2
subject: 65F10, 65F50, 68M14

description: In this paper, we propose a new parallel algorithm which could work naturally on the parallel computer with arbitrary number of processors. This algorithm is named Virtual Transmission Method (VTM). Its physical backgroud is the lossless transmission line and microwave network. The basic idea of VTM is to insert lossless transmission lines into the sparse linear system to achieve distributed computing. VTM is proved to be convergent to solve SPD linear system. Preconditioning method and performance model are presented. Numerical experiments show that VTM is efficient, accurate and stable. Accompanied with VTM, we bring in a new technique to partition the symmetric linear system, which is named Generalized Node & Branch Tearing (GNBT). It is based on Kirchhoff's Current Law from circuit theory. We proved that GNBT is feasible to partition any SPD linear system.
description: v1: short paper to describe VTM, published by NCM'08; v2: add an example of level-two splitting; v3: full paper; v4: rename EVS to GNBT; add lines coupling technique; v5: reuse EVS, get rid of GNBT; more info, see http://weifei00.googlepages.com
The Seven Deadly Sins: when computing crystal nucleation rates, the devil is in the details
Creators: name: Blow, Katarina E.
name: Quigley, David
name: Sosso, Gabriele C.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Soft Condensed Matter (cond-mat.soft)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: The formation of crystals has proven to be one of the most challenging phase transformations to quantitatively model - let alone to actually understand - be it by means of the latest experimental technique or the full arsenal of enhanced sampling approaches at our disposal. One of the most crucial quantities involved with the crystallization process is the nucleation rate, a single, elusive number that is supposed to quantify the average probability for a nucleus of critical size to occur within a certain volume and time span. A substantial amount of effort has been devoted to attempt a connection between the crystal nucleation rates computed by means of atomistic simulations and their experimentally measured counterparts. Sadly, this endeavour almost invariably fails to some extent, with the venerable classical nucleation theory typically blamed as the main culprit. Here, we review some of the recent advances in the field, focusing on a number of perhaps more subtle details that are sometimes overlooked when computing nucleation rates. We believe it is important for the community to be aware of the full impact of aspects such as finite size effects and slow dynamics, that often introduce inconspicuous and yet non-negligible sources of uncertainty into our simulations. In fact, it is key to obtain robust and reproducible trends to be leveraged so as to shed new light on the kinetics of a process, that of crystal nucleation, which is involved into countless practical applications, from the formulation of pharmaceutical drugs to the manufacturing of nano-electronic devices.
description: 15 pages (excluding references, 19 if included), 5 figures
Weakly anisotropic frustrated zigzag spin chain
Creators: name: Dmitriev, D. V.
name: Krivnov, V. Ya.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The frustrated spin-1/2 model with weakly anisotropic ferromagnetic nearest-neighbor and antiferromagnetic next-nearest-neighbor exchanges is studied with use of variational mean-field approach, scaling estimates of the infrared divergencies in the perturbation theory and finite-size calculations. The ground state phase diagram of this model contains three phases: the ferromagnetic phase, the commensurate spin-liquid phase and the incommensurate phase. The non-trivial behavior of the boundaries between these phases and the character of the phase transitions in case of weak anisotropy are determined.
description: 13 pages, 4 figures
Anisotropic turbulent transport with horizontal shear in stellar radiative zones
Creators: name: Prat, Vincent
name: Mathis, Stéphane
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Context. Turbulent transport in stellar radiative zones is a key ingredient of stellar evolution theory, but the anisotropy of the transport due to the stable stratification and the rotation of these regions is poorly understood. The assumption of shellular rotation, which is a cornerstone of the so-called rotational mixing, relies on an efficient horizontal transport. However, this transport is included in many stellar evolution codes through phenomenological models that have never been tested. Aims. We investigate the impact of horizontal shear on the anisotropy of turbulent transport. Methods. We used a relaxation approximation (also known as τ approximation) to describe the anisotropising effect of stratification, rotation, and shear on a background turbulent flow by computing velocity correlations. Results. We obtain new theoretical scalings for velocity correlations that include the effect of horizontal shear. These scalings show an enhancement of turbulent motions, which would lead to a more efficient transport of chemicals and angular momentum, in better agreement with helio- and asteroseismic observations of rotation in the whole Hertzsprung-Russell diagram. Moreover, we propose a new choice for the non-linear time used in the relaxation approximation, which characterises the source of the turbulence. Conclusions. For the first time, we describe the effect of stratification, rotation, and vertical and horizontal shear on the anisotropy of turbulent transport in stellar radiative zones. The new prescriptions need to be implemented in stellar evolution calculations. To do so, it may be necessary to implement non-diffusive transport.
description: 7 pages, accepted for publication in A&A
Spin-transfer torque in magnetic tunnel junctions: Scattering theory
Creators: name: Xiao, Jiang
name: Bauer, Gerrit E. W.
name: Brataas, Arne
Publisher: name: arXiv
Year: 2008
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We study the bias-dependent spin-transfer torque in magnetic tunnel junctions in the Stoner model by scattering theory. We show that the in-plane (Slonczewski type) torque vanishes and subsequently reverses its direction when the bias voltage becomes larger or the barrier wider than material and device-dependent critical values. We are able to reproduce the magnitude and the bias dependence of measured in-plane and out-of-plane torques using realistic parameters. The condition for the vanishing torque is summarized by a phase diagram depending on the applied bias and barrier width, which is explained in terms of an interface spin polarization and the electron focusing by the barrier. Quantum size effects in the spin-transfer torque are predicted as a function of the thickness of a normal metal layer inserted between the ferromagnet and tunnel barrier.
description: 10 pages, 10 figures. to be published on Physical Review B
Renormalization group method based on the ionization energy theory
Creators: name: Arulsamy, Andrew Das
Publisher: name: arXiv
Year: 2008
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences
subject: 82B28, 82B26, 81V70

description: Proofs are developed to explicitly show that the ionization energy theory (IET) is a renormalized theory, which mathematically exactly satisfies the renormalization group formalisms developed by Gell-Mann-Low, Shankar and Zinn-Justin. However, the cutoff parameter for IET relies on the energy-level spacing, instead of lattice spacing in \textbf{k}-space. Subsequently, we apply the earlier proofs to prove that the mathematical structure of the ionization-energy dressed electron-electron screened Coulomb potential is exactly the same as the ionization-energy dressed electron-phonon interaction potential. The latter proof is proven by means of the second-order time-independent perturbation theory with the heavier effective mass condition, as required by the electron-electron screened Coulomb potential. The outcome of this proof is that we can derive the heat capacity and the Debye frequency as a function of ionization energy, which can be applied in strongly correlated matter and nanostructures.
description: To be published in Ann. Phys. (N.Y.)
Population-wide analysis of prescription trajectories: 7.2 million Danish patients over 25 years with 1.1 billion redeemed prescriptions
Creators: name: Brunak, Søren
Publisher: name: F1000 Research Limited
Year: 2021

description: It is unknown how sequential drug patterns convey information on a patient’s health status and treatment guidelines rarely account for this. Drug-agnostic longitudinal analyses of prescription trajectories in a population-wide setting are needed. Using 25 years of data from the Danish prescription registry we model the risk of sequentially redeeming drugs after each other and nd the “high-ways” in drug space.
From Classical to Hierarchical: benchmarks for the HTN Track of the International Planning Competition
Creators: name: Pellier, Damien
name: Fiorino, Humbert
Publisher: name: arXiv
Year: 2021
Subjects: subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: In this short paper, we outline nine classical benchmarks submitted to the first hierarchical planning track of the International Planning competition in 2020. All of these benchmarks are based on the HDDL language. The choice of the benchmarks was based on a questionnaire sent to the HTN community. They are the following: Barman, Childsnack, Rover, Satellite, Blocksworld, Depots, Gripper, and Hiking. In the rest of the paper we give a short description of these benchmarks. All are totally ordered.
Survival Probabilities in Coherent Exciton Transfer with Trapping
Creators: name: Muelken, Oliver
name: Blumen, Alexander
name: Amthor, Thomas
name: Giese, Christian
name: Reetz-Lamour, Markus
name: Weidemueller, Matthias
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Physics (quant-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: In the quest for signatures of coherent transport we consider exciton trapping in the continuous-time quantum walk framework. The survival probability displays different decay domains, related to distinct regions of the spectrum of the Hamiltonian. For linear systems and at intermediate times the decay obeys a power-law, in contrast to the corresponding exponential decay found in incoherent continuous-time random walk situations. To differentiate between the coherent and incoherent mechanisms, we present an experimental protocol based on a frozen Rydberg gas structured by optical dipole traps.
description: 4 pages, 4 figures
Longitudinal Variations in the Stratosphere of Uranus from the Spitzer Infrared Spectrometer
Creators: name: Rowe-Gurney, Naomi
name: Fletcher, Leigh N.
name: Orton, Glenn S.
name: Roman, Michael T.
name: Mainzer, Amy
name: Moses, Julianne I.
name: de Pater, Imke
name: Irwin, Patrick G. J.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: NASA's Spitzer Infrared Spectrometer (IRS) acquired mid-infrared (5-37 microns) disc-averaged spectra of Uranus very near to its equinox in December 2007. A mean spectrum was constructed from observations of multiple central meridian longitudes, spaced equally around the planet, which has provided the opportunity for the most comprehensive globally-averaged characterisation of Uranus' temperature and composition ever obtained (Orton et al., 2014 a [arXiv:1407.2120], b [arXiv:1407.2118]). In this work we analyse the disc-averaged spectra at four separate central meridian longitudes to reveal significant longitudinal variability in thermal emission occurring in Uranus' stratosphere during the 2007 equinox. We detect a variability of up to 15% at wavelengths sensitive to stratospheric methane, ethane and acetylene at the ~0.1-mbar level. The tropospheric hydrogen-helium continuum and deuterated methane absorption exhibit a negligible variation (less than 2%), constraining the phenomenon to the stratosphere. Building on the forward-modelling analysis of the global average study, we present full optimal estimation inversions (using the NEMESIS retrieval algorithm, Irwin et al., 2008 [10.1016/j.jqsrt.2007.11.006]) of the Uranus-2007 spectra at each longitude to distinguish between thermal and compositional variability. We found that the variations can be explained by a temperature change of less than 3 K in the stratosphere. Near-infrared observations from Keck II NIRC2 in December 2007 (Sromovsky et al., 2009 [arXiv:1503.01957], de Pater et al., 2011 [10.1016/j.icarus.2011.06.022]), and mid-infrared observations from VLT/VISIR in 2009 (Roman et al., 2020 [arXiv:1911.12830]), help to localise the potential sources to either large scale uplift or stratospheric wave phenomena.
description: 26 pages, 21 figures, to be published in Icarus (accepted 2021-04-27)
title: An Attempt To Model The Length-Weight Relationship For Saithe In Icelandic Waters
Creators: name: Gudmundsdottir, Asta
name: Steinarsson, Björn Ævarr
Publisher: name: ASC 1997 - CC
Year: 2024
Subjects: Fisheries and aquaculture
Ecosystem observation, processes and dynamics

description: No abstracts are to be cited without prior reference to the author.In 1993 on-board scales for weighing individual fish were taken into use on Icelandic research vessels. All fish sampled for ageing have been weighted (and length-measured) since that time. These data on length and weight are used to examine length-weight relationships for saithe in Icelandic waters. The paper compares several approaches to modelling these data. The resulting models can be used to validate the data collection process in addition to obtaining biological information.
Generalization error for multi-class margin classification
Creators: name: Shen, Xiaotong
name: Wang, Lifeng
Publisher: name: arXiv
Year: 2007
Subjects: subject: Statistics Theory (math.ST)
subject: FOS: Mathematics
subject: 68T10, 62H30 (Primary)

description: In this article, we study rates of convergence of the generalization error of multi-class margin classifiers. In particular, we develop an upper bound theory quantifying the generalization error of various large margin classifiers. The theory permits a treatment of general margin losses, convex or nonconvex, in presence or absence of a dominating class. Three main results are established. First, for any fixed margin loss, there may be a trade-off between the ideal and actual generalization performances with respect to the choice of the class of candidate decision functions, which is governed by the trade-off between the approximation and estimation errors. In fact, different margin losses lead to different ideal or actual performances in specific cases. Second, we demonstrate, in a problem of linear learning, that the convergence rate can be arbitrarily fast in the sample size $n$ depending on the joint distribution of the input/output pair. This goes beyond the anticipated rate $O(n^{-1})$. Third, we establish rates of convergence of several margin classifiers in feature selection with the number of candidate variables $p$ allowed to greatly exceed the sample size $n$ but no faster than $\exp(n)$.
description: Published at http://dx.doi.org/10.1214/07-EJS069 in the Electronic Journal of Statistics (http://www.i-journals.org/ejs/) by the Institute of Mathematical Statistics (http://www.imstat.org)
Thermal entanglement in the anisotropic Heisenberg XXZ model with the Dzyaloshinskii-Moriya interaction
Creators: name: Li, Da-Chuang
name: Wang, Xian-Ping
name: Cao, Zhuo-Liang
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The thermal entanglement is investigated in a two-qubit Heisenberg XXZ system with Dzyaloshinskii-Moriya (DM) interaction. It is shown that the entanglement can be efficiently controlled by the DM interaction parameter and coupling coefficient $J_{z}$. $D_{x}$(the x-component parameter of the DM interaction) has a more remarkable influence on the entanglement and the critical temperature than $D_{z}$(the z-component parameter of the DM interaction). Thus, by the change of DM interaction direction, we can get a more efficient control parameter to increase the entanglement and the critical temperature.
description: 5 pages, 6 figures, a revised version
Heterogeneous versus homogeneous crystal nucleation in hard spheres
Creators: name: Espinosa, Jorge R.
name: Vega, Carlos
name: Valeriani, Chantal
name: Frenkel, Daan
name: Sanz, Eduardo
Publisher: name: arXiv
Year: 2021
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Hard-sphere model systems are well-suited in both experiment and simulations to investigate fundamental aspects of the crystallization of fluids. In experiments on colloidal models of hard-sphere fluids, the uid is unavoidably at contact with the walls of the sample cell, where heterogeneous crystallization may take place. In this work we use simulations to investigate the competition between homogeneous and heterogeneous crystallization. We report simulations of wall-induced nucleation for different confining walls. Combining the results of these simulations with earlier studies of homogeneous allows us to asses the competition between homogeneous and heterogeneous nucleation as a function of wall type, fluid density and the system size. On at walls, heterogeneous nucleation will typically overwhelm homogeneous nucleation. However, even for surfaces randomly coated with spheres with a diameter that was some three times larger than that of the fluid spheres - as has been used in some experiments - heterogeneous nucleation is likely to be dominant for volume fractions smaller than 0.535. Only for a disordered coating that has the same structure as the liquid holds promise did we find the nucleation was likely to occur in the bulk. Hence, such coatings might be used to suppress heterogeneous nucleation in experiments. Finally, we report the apparent homogeneous nucleation rate taking into account the formation of crystallites both in the bulk and at the walls. We find that the apparent overall nucleation rates coincides with those reported in "homogeneous nucleation" experiments. This suggests that heterogeneous nucleation at the walls could partly explain the large discrepancies found between experimental measurements and simulation estimates of the homogeneous nucleation rate.
Probing polarization states of primordial gravitational waves with CMB anisotropies
Creators: name: Saito, Shun
name: Ichiki, Kiyotomo
name: Taruya, Atsushi
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We discuss the polarization signature of primordial gravitational waves imprinted in cosmic microwave background (CMB) anisotropies. The high-energy physics motivated by superstring theory or M-theory generically yield parity violating terms, which may produce a circularly polarized gravitational wave background (GWB) during inflation. In contrast to the standard prediction of inflation with un-polarized GWB, circularly polarized GWB generates non-vanishing TB and EB-mode power spectra of CMB anisotropies. We evaluate the TB and EB-mode power spectra taking into account the secondary effects and investigate the dependence of cosmological parameters. We then discuss current constraints on the circularly polarized GWB from large angular scales (l < 16) of the three year WMAP data. Prospects for future CMB experiments are also investigated based on a Monte Carlo analysis of parameter estimation, showing that the circular polarization degree, varepsilon, which is the asymmetry of the tensor power spectra between right- and left-handed modes normalized by the total amplitude, can be measured down to |varepsilon| 0.35(r/0.05)^{-0.6}.
description: 28 pages, 9 figures, Accepted for publication in JCAP
On certain arithmetic functions involving exponential divisors, II
Creators: name: Tóth, László
Publisher: name: arXiv
Year: 2007
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 11N37

description: Asymptotic properties of certain arithmetic functions involving exponential divisors are investigated.
description: Dedicated to the memory of Professor M. V. Subbarao, some misprints corrected
Corrosion and stress corrosion cracking of steels in seawater and sea sand concrete environment
Creators: name: YU, XIANG
Publisher: name: Monash University
Year: 2022
Subjects: subject: 91207 Metals and Alloy Materials
subject: FOS: Materials engineering

description: This study focuses on the electrochemical behavior and stress corrosion cracking (SCC) behavior of mild steels and stainless steels in various concrete environments and the role of silica addition in the corrosion and cracking of steels. Through studies, alkalinity is found to play a vital role in stainless steels corrosion and the chloride is detrimental to mild steel. Silicate addition to an aqueous corrosive environment can cause the formation of ferrosilite or the formation of hydrated calcium silicate gel. Various silicate addition will have different impacts on the corrosion and SCC behaviour of steels.
Logarithmic knot invariants arising from restricted quantum groups
Creators: name: Murakami, Jun
name: Nagatomo, Kiyokazu
Publisher: name: arXiv
Year: 2007
Subjects: subject: Geometric Topology (math.GT)
subject: FOS: Mathematics
subject: 57M27 (Primary) 17B37, 20G42 (Secondary)

description: We construct knot invariants from the radical part of projective modules of restricted quantum groups. We also show a relation between these invariants and the colored Alexander invariants.
description: 9 pages, 2 figures
title: Migratory Pattern Of Homing Atlantic Salmon (Salmo Salar L.) In Coastal Waters W-Iceland, Recorded By Data Storage Tags
Creators: name: Sturlaugsson, Johannes
name: Thorisson, Konrad
Publisher: name: ASC 1997 - CC
Year: 2024
Subjects: Fisheries and aquaculture
Ecosystem observation, processes and dynamics

description: No abstracts are to be cited without prior reference to the author.A migration study on the homing of Atlantic salmon (Salmo salar L.) was carried out in coastal W- Iceland waters in August 1996. External data storage tags (DSTs) were used to record pressure (depth), temperature and conductivity (salinity) during the migration. The DSTs were programmed to measure at 3-30 minutes intervals for 17-24 days. The present DST recordings are the first to include salinity measurements. A•total of 100 salmon were captured and tagged in the estuaries when entering their home waters at the ocean ranching stations in Lares and Hraunsfjord. Of these, 92 were transfered and released at the shore in Borgarfjord (shortest sea route 170-200 km), but the remaining 8 served as controls and were released near their home water. The recapture rates of different groups ranged from 58 to 65 % , whereof 40-51 % were recaptured in the ocean ranching stations 3-82 days after release, but others in inshore nets or in rivers. The mean travelling speed of the salmon from release to recapture, ranged from 0, 1-1,8 km/hour, but examples up 4 km/hour were found based on the actual departure from release site arid the arrival io home estuary. Comparison with temperature data frorri satellites showed that most of the salmon migrated quite close to the coast. The DSTs salinity measurements showed that some individuals migrated_ into estuaries and even into rivers on their way to their home waters in Lares and Hraunsfjord. The depth records showed that the salmon migrated mostly in the uppermost few meters. The salmon often showed diurnal rythm in vertical movements, staying deeper at night. The salmon were closest to the surface during noon and the majority of the deepest dives were related to st.inset and sunrise. The usual pattern of migration through deeper layers were a series of rapid dives. Usually the dives were just a few meters, but occasional dives were taken down trough the thermocline at 20-40 in depth, and even down to 110 meters. The migratory patterns of the salmon are further discussed in relation to the possible cues/clues used by the salmon while navigating to their home water.
Signatures of sub-band excitons in few-layer black phosphorus
Creators: name: Chaves, A.
name: Sousa, G. O.
name: Khaliji, K.
name: da Costa, D. R.
name: Farias, G. A.
name: Low, Tony
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Recent experimental measurements of light absorption in few-layer black phosphorus (BP) reveal a series of high and sharp peaks, interspersed by pairs of lower and broader features. Here, we propose a theoretical model for these excitonic states in few-layer black phosphorus (BP) within a continuum approach for the in-plane degrees of freedom and a tight-binding approximation that accounts for inter-layer couplings. This yields excitonic transitions between different combinations of the sub-bands created by the coupled BP layers, which leads to a series of high and low oscillator strength excitonic states, consistent with the experimentally observed bright and dark exciton peaks, respectively. The main characteristics of such sub-band exciton states, as well as the possibility to control their energies and oscillator strengths via applied electric and magnetic fields, are discussed, towards a full understanding of the excitonic spectrum of few-layer BP and its tunability.
description: to appear in Phys. Rev. B
140 GHz Urban Microcell Propagation Measurements for Spatial Consistency Modeling
Creators: name: Ju, Shihao
name: Rappaport, Theodore S.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: Sub-Terahertz frequencies (frequencies above 100 GHz) have the potential to satisfy the unprecedented demand on data rate on the order of hundreds of Gbps for sixth-generation (6G) wireless communications and beyond. Accurate beam tracking and rapid beam selection are increasingly important since antenna arrays with more elements generate narrower beams to compensate for additional path loss within the first meter of propagation distance at sub-THz frequencies. Realistic channel models for above 100 GHz are needed, and should include spatial consistency to model the spatial and temporal channel evolution along the user trajectory. This paper introduces recent outdoor urban microcell (UMi) propagation measurements at 142 GHz along a 39 m $\times$ 12 m rectangular route (102 m long), where each consecutive and adjacent receiver location is 3 m apart from each other. The measured power delay profiles and angular power spectrum at each receiver location are used to study spatial autocorrelation properties of various channel parameters such as shadow fading, delay spread, and angular spread along the track. Compared to the correlation distances reported in the 3GPP TR 38.901 for frequencies below 100 GHz, the measured correlation distance of shadow fading at 142 GHz (3.8 m) is much shorter than the 10-13 m as specified in 3GPP; the measured correlation distances of delay spread and angular spread at 142 GHz (both 12 m) are comparable to the 7-10 m as specified in 3GPP. This result may guide the development of a statistical spatially consistent channel model for frequencies above 100 GHz in the UMi street canyon environment.
description: 6 pages, 6 figures
Self-similar extrapolation in quantum field theory
Creators: name: Yukalov, V. I.
name: Yukalova, E. P.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: Calculations in field theory are usually accomplished by employing some variants of perturbation theory, for instance using loop expansions. These calculations result in asymptotic series in powers of small coupling parameters, which as a rule are divergent for finite values of the parameters. In this paper, a method is described allowing for the extrapolation of such asymptotic series to finite values of the coupling parameters, and even to their infinite limits. The method is based on self-similar approximation theory. This theory approximates well a large class of functions, rational, irrational, and transcendental. A method is presented, resulting in self-similar factor approximants allowing for the extrapolation of functions to arbitrary values of coupling parameters from only the knowledge of expansions in powers of small coupling parameters. The efficiency of the method is illustrated by several problems of quantum field theory.
description: 35 pages, 6 figures
Amtliche Mitteilungen der Technischen Universität Dortmund Nr. 27/2021
Creators: name: (:Unkn) Unknown
Publisher: name: Technische Universität Dortmund
Year: 2021
Subjects: subject: 080

description: Geschäftsordnung der Hochschulwahlversammlung der Technischen Universität Dortmund vom 4. August 2021
description: Amtliche Mitteilungen der Technischen Universität Dortmund;2021;27
title: On PossibiIity To Apply The Stefansson Stock Production Model For Assessment Of Shrimp (Pandalus Borealis) Stock In The Barents Sea
Creators: name: Berenboim, B.
name: Korzhev, V.
Publisher: name: ASC 1997 - DD
Year: 2024
Subjects: Fisheries and aquaculture
Pressures, impacts, conservation, and management

description: No abstracts are to be cited without prior reference to the author.A possibility of using Stefansson's production model for stock assessment of northern shrimp in the Barents Sea is considered. It is established, that providing the model's modification with regard to actual consumption of shrimp by cod, it satisfactorily characterizes dynamics of variation in shrimp stock of the Barents Sea.
Bella tonant totumque quatit discordia mundum: scrivere in latino durante la Grande Guerra
Creators: name: Cristini, Marco
Publisher: name: FuturoClassico FCl
Year: 2019
Subjects: Neo-Latin Literature; Neo-Latin Poetry; First World War; First World War Poetry; Classical Tradition.

description: This article aims to offer an overview of Neo-Latin literature between 1914 and 1920. The authors of Latin writings about the Great War – young people just out of high school, university students, priests, professors and politicians – described famous battles as well as more private episodes. Elegies are predominant, but there are also short epigrams, songs, epistles, jokes and encyclicals. These works are transnational, since authors from different countries wrote in the same language, using the same metrical structures, figures of speech and literary models. Therefore, the picture of the conflict which emerges from their writings resembles not a clash of civilizations, but rather a long and bitter civil war.
description: FuturoClassico FCl, N. 5 (2019)
Suicide in the construction industry: literature review
Creators: name: Tijani, Bashir
name: Nwaeze, Justina Falan
name: Jin, Xiaohua
name: Osei-Kyei, Robert
Publisher: name: Taylor & Francis
Year: 2021
Subjects: subject: Medicine
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Science Policy

description: Urgent needs to tackle the pervasiveness of suicide in the construction industry due to economic and social consequences sparked burst in literature to address the root causes and intervention for suicide. To comprehend the current state of art of suicide in the construction industry, systematic review becomes the viable option. Despite this, there is scanty study on systematic review of suicide in the construction industry. Therefore, this paper aims to systematically review 28 extant studies on suicide in the construction industry from 1992 to 2021 (years inclusive) to reveal the current state of art in the subject area. The study deduced that previous studies focused on risk factors for suicide, economic cost of suicide and suicide interventions in the construction industry. Theoretically, the findings contribute to the body of literature by revealing the limitation in the identified risk factors for suicide, economic cost of suicide and suicide intervention to unpack future studies on suicide risk factors, optimum investment in suicide and theoretical model on relationships between suicide risk, suicide interventions and suicide in the construction industry. To the practitioners, the identified risk factors can be used to develop psychosocial risk management for suicide, economic cost to determine the optimum financial investment for suicide prevention and suicide interventions to reduce suicide rate among construction workers.
Skin models for cutaneous melioidosis reveal Burkholderia infection dynamics at wound's edge with inflammasome activation, keratinocyte extrusion and epidermal detachment
Creators: name: Ku, Joanne Wei Kay
name: Marsh, Supatra Tharinee
name: Nai, Mui Hoon
name: Robinson, Kim Samirah
name: Thiam, Daniel Teo Eng
name: Zhong, Franklin Lei
name: Brown, Katherine A
name: Lim, Thiam Chye
name: Lim, Chwee Teck
name: Gan, Yunn-Hwen
Publisher: name: Taylor & Francis
Year: 2021
Subjects: subject: Medicine
subject: Microbiology
subject: FOS: Biological sciences
subject: Cell Biology
subject: Biotechnology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Immunology
subject: FOS: Clinical medicine
subject: 69999 Biological Sciences not elsewhere classified
subject: Developmental Biology
subject: Cancer
subject: 110309 Infectious Diseases
subject: FOS: Health sciences
subject: Computational Biology

description: Melioidosis is a serious infectious disease endemic in Southeast Asia, Northern Australia and has been increasingly reported in other tropical and subtropical regions in the world. Percutaneous inoculation through cuts and wounds on the skin is one of the major modes of natural transmission. Despite cuts in skin being a major route of entry, very little is known about how the causative bacterium Burkholderia pseudomallei initiates an infection at the skin and the disease manifestation at the skin known as cutaneous melioidosis. One key issue is the lack of suitable and relevant infection models. Employing an in vitro 2D keratinocyte cell culture, a 3D skin equivalent fibroblast-keratinocyte co-culture and ex vivo organ culture from human skin, we developed infection models utilizing surrogate model organism Burkholderia thailandensis to investigate Burkholderia-skin interactions. Collectively, these models show that the bacterial infection was largely limited at the wound’s edge. Infection impedes wound closure, triggers inflammasome activation and cellular extrusion in the keratinocytes as a potential way to control bacterial infectious load at the skin. However, extensive infection over time could result in the epidermal layer being sloughed off, potentially contributing to formation of skin lesions.
Factors Affecting Green Practices Adoption in Maize Stalks, Cobs, and Peels Disposal: A Case Study of Chiang Rai Maize Farmers
Creators: name: Phutawan Ho
Publisher: name: Luangporyai Association
Year: 2021
Subjects: Agricultural Wastes
Open Burning
Haze Pollution
Maize
Green Agriculture

description: International Journal of Multidisciplinary in Management and Tourism, 5, 2, 47-55
Teleparallel Killing Vectors of the Einstein Universe
Creators: name: Sharif, M.
name: Amir, M. Jamil
Publisher: name: arXiv
Year: 2007
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In this short paper we establish the definition of the Lie derivative of a second rank tensor in the context of teleparallel theory of gravity and also extend it for a general tensor of rank $p+q$. This definition is then used to find Killing vectors of the Einstein universe. It turns out that Killing vectors of the Einstein universe in the teleparallel theory are the same as in General Relativity.
description: 9 pages, accepted for publication in Mod. Phys. Lett. A
Optical control of non-equilibrium superconducting phase transition below Tc in a cuprate
Creators: name: Giannetti, Claudio
name: Coslovich, Giacomo
name: Cilento, Federico
name: Ferrini, Gabriele
name: Eisaki, Hiroshi
name: Kaneko, Nobuhisa
name: Greven, Martin
name: Parmigiani, Fulvio
Publisher: name: arXiv
Year: 2008
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Photoinduced phase transitions from insulating to metallic states, accompanied by structural re-arrangements, have been recently reported in complex transition-metal oxides. However, the optical control of a purely electronic phase transition, where the thermodynamic phase is determined by the distribution of excitations, has remained elusive. Here we report optical control of the electronic phase in an underdoped Bi2212 crystal through impulsive photoinjection of quasiparticles (QP) via ultrashort laser pulses, avoiding significant laser heating. An abrupt transition of the transient optical electronic response is observed at a critical fluence of Ipump=70 uJ/cm^2. We show that the measured dynamics is consistent with an inhomogenous first-order superconducting-to-normal state phase transition, triggered by a sudden shift of the chemical potential.
description: Manuscript: 8 pages, 4 figures Supporting material: 2 pages
Polygon Exploration with Time-Discrete Vision
Creators: name: Fekete, Sandor P.
name: Schmidt, Christiane
Publisher: name: arXiv
Year: 2008
Subjects: subject: Computational Geometry (cs.CG)
subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences
subject: F.2.2; I.2.9

description: With the advent of autonomous robots with two- and three-dimensional scanning capabilities, classical visibility-based exploration methods from computational geometry have gained in practical importance. However, real-life laser scanning of useful accuracy does not allow the robot to scan continuously while in motion; instead, it has to stop each time it surveys its environment. This requirement was studied by Fekete, Klein and Nuechter for the subproblem of looking around a corner, but until now has not been considered in an online setting for whole polygonal regions. We give the first algorithmic results for this important algorithmic problem that combines stationary art gallery-type aspects with watchman-type issues in an online scenario: We demonstrate that even for orthoconvex polygons, a competitive strategy can be achieved only for limited aspect ratio A (the ratio of the maximum and minimum edge length of the polygon), i.e., for a given lower bound on the size of an edge; we give a matching upper bound by providing an O(log A)-competitive strategy for simple rectilinear polygons, using the assumption that each edge of the polygon has to be fully visible from some scan point.
description: 28 pages, 17 figures, 2 photographs, 3 tables, Latex. Updated some details (title, figures and text) for final journal revision, including explicit assumption of full edge visibility
title: An Assessment Of A Long-Iived Redfish Species, Sebastes Marinus, In Boreal Waters
Creators: name: Stefansson, Gunnar
name: Sigurdsson, Porsteinn
Publisher: name: ASC 1997 - DD
Year: 2024
Subjects: Fisheries and aquaculture
Pressures, impacts, conservation, and management

description: No abstracts are to be cited without prior reference to the author.An assessment method for fish without age-based data is presented. The method is tested on cod (Gadus morhua in Icelandic waters) and applied to a long-lived species of redfish (Sebastes marinus) in the East Greenland-Iceland-Faeroe area. The method utilizes survey indices and length distributions from survey and catch data. Test results show that although the estimation of initial conditions is problematic, the model adequately reproduces subsequent relative levels of recruitment, biomass and fishing mortality. The method appears to be adequate for use with redfish species which have considerable contrasts in the data sets of abundance and length distributions but considerable care needs to be exercised in its use due to the confounding of various variables when only survey indices and length distributions are used for assessments.
title: Factors Affecting Discards By The Coastal Spanish North Atlantic Trawlers
Creators: name: Trujillo, V.
name: Perez, N.
name: Pereda, P.
Publisher: name: ASC 1997 - DD
Year: 2024
Subjects: Fisheries and aquaculture
Pressures, impacts, conservation, and management

description: No abstracts are to be cited without prior reference to the author.Variations in the total discard in weight were evaluated by Spanish trawler fleet operating in the North Atlantic Spanish coast in 1994. The data used for this study came from observers on board commercial fishing boats in ICES Divisions VIiie and IXa during normal fishing activity. A total of 493 hauls were analysed and 221 commercial and non-commercial species discarded were determined. The response variable studied is the whole discard of all species per unit effort. A general analysis of covariance was carried out with the following sources of variation: trip, quarter, area, port, three types of gears, groups of boats (using multivariant analysis of classification) and as covariables: total catch per unit effort, fishing hours, depth, tonnage, horsepower and length of the boats studied. The results show a great variation in the discard values by unit of effort for this fleet, except for the intra-annual variation.
The genus Phyllorhiza (RHIZOSTOMEAE: MASTIGIIDAE) in coastal waters of the Andaman Sea and the Gulf of Thailand
Creators: name: Isara Arsiranant
Publisher: name: Phuket Marine Biological Center
Year: 2020
Subjects: Phyllorhiza
Andaman Sea
Gulf of Thailand
morphological characters
molecular study

description: Phuket Marine Biological Center Research Bulletin, 77, 1, 61-76