cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Drone-as-a-Service Composition Under Uncertainty
Creators: name: Hamdi, Ali
name: Salim, Flora D.
name: Kim, Du Yong
name: Neiat, Azadeh Ghari
name: Bouguettaya, Athman
Publisher: name: arXiv
Year: 2021
Subjects: subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: We propose an uncertainty-aware service approach to provide drone-based delivery services called Drone-as-a-Service (DaaS) effectively. Specifically, we propose a service model of DaaS based on the dynamic spatiotemporal features of drones and their in-flight contexts. The proposed DaaS service approach consists of three components: scheduling, route-planning, and composition. First, we develop a DaaS scheduling model to generate DaaS itineraries through a Skyway network. Second, we propose an uncertainty-aware DaaS route-planning algorithm that selects the optimal Skyways under weather uncertainties. Third, we develop two DaaS composition techniques to select an optimal DaaS composition at each station of the planned route. A spatiotemporal DaaS composer first selects the optimal DaaSs based on their spatiotemporal availability and drone capabilities. A predictive DaaS composer then utilises the outcome of the first composer to enable fast and accurate DaaS composition using several Machine Learning classification methods. We train the classifiers using a new set of spatiotemporal features which are in addition to other DaaS QoS properties. Our experiments results show the effectiveness and efficiency of the proposed approach.
description: 20 pages, 20 figures, Accepted for publication at IEEE Transactions on Services Computing
Lessons Learned and Improvements when Building Screen-Space Samplers with Blue-Noise Error Distribution
Creators: name: Belcour, Laurent
name: Heitz, Eric
Publisher: name: arXiv
Year: 2021
Subjects: subject: Graphics (cs.GR)
subject: FOS: Computer and information sciences
subject: I.3.7

description: Recent work has shown that the error of Monte-Carlo rendering is visually more acceptable when distributed as blue-noise in screen-space. Despite recent efforts, building a screen-space sampler is still an open problem. In this talk, we present the lessons we learned while improving our previous screen-space sampler. Specifically: we advocate for a new criterion to assess the quality of such samplers; we introduce a new screen-space sampler based on rank-1 lattices; we provide a parallel optimization method that is compatible with a GPU implementation and that achieves better quality; we detail the pitfalls of using such samplers in renderers and how to cope with many dimensions; and we provide empirical proofs of the versatility of the optimization process.
description: 2 pages, 1 figure
title: Study Of European Flying Squid, Todarodes Sagittatus (Lamarck), Occurring In Deep Waters South Of Iceland
Creators: name: Jonsson, Einar
Publisher: name: ASC 1998 - M
Year: 2024
Subjects: Ecosystem observation, processes and dynamics

description: No abstracts are to be cited without prior reference to the author.In autumn 1995 red-fish trawlers fishing above the continental shelf south of Iceland reported some by-catch of squid identified as European flying squid, Todarodes sagittatus (Lamarck), a species which is known to have migrated regularly to the Icelandic coast in late summer or autumn but had failed to do so for a long period of time. Fishing trials for the squid were undertaken in October 1995 and November 1996 using commercial trawler and a slightly modified large pelagic redfish trawl. This effort was unsuccessful as only small number of Todarodes were caught. The dorsal mantel length (DML) of approximately 600 species was measured and¼ of the samples were frozen for further study. Body- and liver-weight as well as weight of sexual glands, sex and sexual maturation and stomach contents were recorded. In 1995, the bulk of the squid was of the same size as the historical autumn in-shore migrations (DML 20-30 cm) but a small fraction were larger, DML 30-45 cm. In 1996 the 2 size groups were again found but in equal numbers. During both years the squid consisted mainly of females which were mostly immature. The stomach contents revealed Todarodes to be feeding mainly on small deepwater fish species. During a redfish expedition in an area further off the coast SW of Iceland in May 1998 small traces of Todarodes were recorded with DML ranging from 20-45 cm.
Late Afterglow Bump/Plateau around the Jet Break: Signature of a free-to-shocked wind Environment in Gamma-ray Burst
Creators: name: Li, Xiao-Yan
name: Lin, Da-Bin
name: Ren, Jia
name: Hou, Shu-Jin
name: Li, Yu-Fei
name: Wang, Xiang-Gao
name: Liang, En-Wei
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: A number of gamma-ray bursts (GRBs) exhibit the late simultaneous bumps in their optical and Xray afterglows around the jet break. Its origin is unclear. Based on the following two facts, we suggest that this feature may sound a transition of circum-burst environment from a free-wind medium to a homogeneous medium. (I) The late bump followed by a steep decay is strongly reminiscent of the afterglows of GRB 170817A, which is attributed to an off-axis observed external-forward shock (eFS) propagating in an interstellar medium. (II) Observations seem to feature a long shallow decay before the late optical bump, which is different from the afterglow of GRB 170817A. In this paper, we study the emission of an eFS propagating in a free-to-shocked wind for on/off-axis observers, where the mass density in the shocked-wind is almost constant. The late simultaneous bumps/plateaux in the optical and X-ray afterglows are really found around the jet break for high-viewing-angle observers. Moreover, there is a long plateau or shallow decay before the late bump in the theoretical light-curves, which is formed during the eFS propagating in the free-wind. For low-viewing-angle observers, the above bumps appear only in the situation that the structured jet has a low characteristic angle and the deceleration radius of the on-axis jet flow is at around or beyond the free-wind boundary. As examples, the X-ray and optical afterglows of GRBs 120326A, 120404A, and 100814A are fitted. We find that an off-axis observed eFS in a free-to-shocked wind can well explain the afterglows in these bursts.
description: 27 pages, 9 figures, submitted to ApJ
title: Downstream Migration Evolution Of Juvenile European Sturgeon Acipenser Sturio L. In The Gironde Estuary
Creators: name: Rochard, E.
name: Lepage, M.
name: Tremblay, S.
name: Gazeau, C.
Publisher: name: ASC 1998 - N
Year: 2024
Subjects: Ecosystem observation, processes and dynamics

description: No abstracts are to be cited without prior reference to the author.The European sturgeon (Acipenser sturio) is a diadromous species that spawns in the rivers in late spring and early summer. The juveniles then spend around two years in the brackish waters (5 to 25 PSU) of the estuary zone before moving out to sea. This study describes the downstream migration evolution from October 1994 to August 1996 of juvenile sturgeon, born in the Gironde basin in the summer of 1994. For the purposes of the study, the inland section of the Gironde estuary was sampled by trawl monthly. The trawls - average duration 32 minutes, average length approx. 4 200 m - were conducted according to a sampling plan, stratified into 13 major zones from the oligohaline (0.5 to 5 PSU) to the polyhaline sectors (18 to 30 PSU) of the estuary. The study shows that the first members of the 1994 cohort (TL=27 cm) were caught in early March 1995 in the zones furthest upstream. A distinction appears between an initial period, in which the fish live mainly in the upstream zones of the marine estuary, and a second, starting from their second growth period (April 1996), in which the juveniles are split into two separate areas about twenty kilometres apart. The two zones are situated 18 km and 38 km respectively from the mouth of the estuary and they do not appear to be any different to their neighbours as regards to depth and type of bed. There is no significant biometric difference (length, weight) between the juveniles of the two zones. However, individual marking has helped to highlight exchanges of animals between the two sectors. The study shows that, within this large estuary of relatively homogeneous depth (4 to 1 O m) and type of substrate (sand/mud, gravel), the juveniles inhabited two quite distinct zones in 1996 before they left the estuary for the sea.
title: Growth Patterns In Post-Smolts Captured In The Labrador Sea And The Temporal Scale Of Recruitment Coherence In North America
Creators: name: Friedland, Kevin D.
name: Reddin, David G.
Publisher: name: ASC 1998 - N
Year: 2024
Subjects: Ecosystem observation, processes and dynamics

description: No abstracts are to be cited without prior reference to the author.We examined scale samples from historical collections ofpost-smolts made in the Labrador Sea with the aim of understanding the growth dynamics of stocks at the southern end of the range versus what is hypothesized tobe thejuvenile nursery for post-smolts from the entire stock complex.-Circuli spacing patterns were.· extracted from the scales of 1,525 salmon collected from ISW and 2SW returns µ, southern Tivers and post-smolts collected in the Labrador Sea for three smolt years: 1988, 1989, and 1991. For two of the three years, growth . trajectol'ies for fish from the southern stocks intersected the traj􀇙ctories for post-smolts from the Labrador Sea collections after 4􀈂5 circuli pairs. Since circuli pairs are laid down at a rate of approximately one per fortnight, the data suggests that distribution patterns for regional groups begin to overlap and stocks begin to experience similar environmental conditions by July of the post-smoit year or two months after their migration to sea. In some years, it would appear regional groups do not inix until fall. These data provide· the first indication of the mixing processes between stocks and,rnaybe useful in understanding regional patterns ofrecruitment coherence in salmon versus coherence patterns associated with the entire-North American stock complex.
Magnesium Isotopes in Halo Stars
Creators: name: Melendez, Jorge
name: Cohen, Judith G.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We have determined Mg isotope ratios in halo field dwarfs and giants in the globular cluster M71 based on high S/N high spectral resolution (R = 10$^5$) Keck HIRES spectra. Unlike previous claims of an important contribution from intermediate-mass AGB stars to the Galactic halo, we find that our $^{26}$Mg/$^{24}$Mg ratios can be explained by massive stars.
description: Proceedings, First Stars III, July 16-20, 2007, Santa Fe
title: Effect Of Age/Weight On The Process Of Seawater Induced Adaptation Of The Sturgeon Acipenser Naccarii Bonaparte 1836
Creators: name: Garcia-Gallego, M.
name: de Lamadrid, A. Sanchez
name: Sanz, A.
name: Munoz, J. L.
name: Domezain, J.
name: Soriguer, M. C.
name: Domezain, A.
name: Hernando, J. A.
Publisher: name: ASC 1998 - N
Year: 2024
Subjects: Ecosystem observation, processes and dynamics

description: No abstracts are to be cited without prior reference to the author.Since 80', Acipenser sturio has been considered as the only sturgeon species autochthonous from Iberian Peninsula, although there were important references supporting the existence of three autochthonous species : Huso huso (Linnaeus, 1758), A. naccarii (Bonaparte, 1836) and A. sturio (Linnaeus, 1758) (Nobre, 1935; Albuquerque, 1956; Banarescu, 1971). Nowadays this assertion • has been fully demonstrated (Domezain et al., 1997; Garrido-Ramos et al., 1997 ; Hernando et al., 1997, Vasil'eva, 1997). In fact, until later 60' there was an important sturgeons fishery activity in the Guadalquivir River (Southern Spain) which was used for caviar production and, according to solid pieces of evidence, based, at least in part, in A. naccarii.
Grand Unification with and without Supersymmetry
Creators: name: Melfo, Alejandra
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Grand Unified Theories based on the group SO(10) generically provide interesting and testable relations between the charged fermions and neutrino sector masses and mixings. In the light of the recent neutrino data, we reexamine these relations both in supersymmetric and non-supersymmetric models, and give a brief review of their present status.
description: Talk given at the VI SILAFAE, Puerto Vallarta, Mexico, November 2006
Modules with reducible complexity
Creators: name: Bergh, Petter Andreas
Publisher: name: arXiv
Year: 2007
Subjects: subject: Commutative Algebra (math.AC)
subject: FOS: Mathematics
subject: 13D02, 13D07

description: For a commutative Noetherian local ring we define and study the class of modules having reducible complexity, a class containing all modules of finite complete intersection dimension. Various properties of this class of modules are given, together with results on the vanishing of homology and cohomology.
description: 13 pages
On Moffatt's magnetic relaxation equations
Creators: name: Beekie, Rajendra
name: Friedlander, Susan
name: Vicol, Vlad
Publisher: name: arXiv
Year: 2021
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 35Q35

description: We investigate the stability properties for a family of equations introduced by Moffatt to model magnetic relaxation. These models preserve the topology of magnetic streamlines, contain a cubic nonlinearity, and yet have a favorable $L^2$ energy structure. We consider the local and global in time well-posedness of these models and establish a difference between the behavior as $t\to \infty$ with respect to weak and strong norms.
description: 24 pages
High energy afterglows and flares from Gamma-Ray Burst by Inverse Compton emission
Creators: name: Galli, A.
name: Piro, L.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We perform a detailed study of inverse Compton (IC) emission for a fireball undergoing external shock (ES) in either a uniform or a wind-like interstellar medium, and assess the relative importance of IC and synchrotron emissions. We determine the primary model parameters driving the IC to synchrotron emission ratio in the case of a short duration central engine. We then investigate the case of ES by a long duration central engine, or delayed external shock (DES), a model that can account for some of the flares observed in GRB X-ray light curves. We present model predictions, in particular in terms of GeV vs X-ray behavior, and compare them with other models proposed to explain the origin of flares. We find that if most of the emission occurs when the fireball is in the fast cooling regime, then a substantial GeV emission is expected both for a short (standard ES) and a long (DES) duration central engine activity. In particular, in the context of standard ES we are able to account for the delayed emission observed in GRB940217. In the case of DES, we find that IC scattering of X-ray flare photons can produce high energy flares in the GeV band, which can be detected by GLAST. The detectability of high energy flares improves with the burst kinetic energy: about 30% of Swift GRBs showing flares in their X-ray light curve have sufficiently large kinetic energy so that the expected high flares can be detected by GLAST. One important prediction of the DES model is the simultaneity between low and high energy flares. To test this simultaneity, the peak energies of both flares need to fall below or within the observational bands. We predict that X-ray flares with peak energy of ~10 eV produce high energy flares with peak energy of around 100 MeV-GeV. Observations by Swift and GLAST then, can test the predicted simultaneity.
description: 16 pages, 15 figures, typos corrected, accepted for pubblication in A&A
Long-range spin transport on the surface of topological Dirac semimetal
Creators: name: Araki, Yasufumi
name: Misawa, Takahiro
name: Nomura, Kentaro
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We theoretically propose the long-range spin transport mediated by the gapless surface states of topological Dirac semimetal (TDSM). Low-dissipation spin current is a building block of next-generation spintronics devices. While conduction electrons in metals and spin waves in ferromagnetic insulators (FMIs) are the major carriers of spin current, their propagation length is inevitably limited due to the Joule heating or the Gilbert damping. In order to suppress dissipation and realize long-range spin transport, we here make use of the spin-helical surface states of TDSMs, such as $\mathrm{Cd_3 As_2}$ and $\mathrm{Na_3 Bi}$, which are robust against disorder. Based on a junction of two FMIs connected by a TDSM, we demonstrate that the magnetization dynamics in one FMI induces a spin current on the TDSM surface flowing to the other FMI. By both the analytical transport theory on the surface and the numerical simulation of real-time evolution in the bulk, we find that the induced spin current takes a universal semi-quantized value that is insensitive to the microscopic coupling structure between the FMI and the TDSM. We show that this surface spin current is robust against disorder over a long range, which indicates that the TDSM surface serves as a promising system for realizing spintronics devices.
description: 16 pages, 11 figures
No-Signalling Bound on Quantum State Discrimination
Creators: name: Croke, Sarah
name: Andersson, Erika
name: Barnett, Stephen M.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Quantum correlations do not allow signalling, and any operation which may be performed on one system of an entangled pair cannot be detected by measurement of the other system alone. This no-signalling condition limits allowed operations and, in the context of quantum communication, may be used to put bounds on quantum state discrimination. We find that the natural figure of merit to consider is the confidence in identifying a state, which is optimised by the maximum confidence strategy. We show that this strategy may be derived from the no-signalling condition, and demonstrate the relationship between maximum confidence measurements and entanglement concentration.
description: 4 pages
Particle detectors in the theory of quantum fields on curved spacetimes
Creators: name: Cant, John Fraser
Publisher: name: University of British Columbia
Year: 2010

description: This work discusses aspects of a fundamental problem in the theory of quantum fields on curved spacetimes - that of giving physical meaning to the particle representations of the theory. In particular, the response of model particle detectors is analysed in detail. Unruh (1976) first introduced the idea of a model particle detector in order to give an operational definition to particles. He found that even in flat spacetime, the excitation of a particle detector does not necessarily correspond to the presence of an energy carrier - an accelerating detector will excite in response to the zero-energy state of the Minkowski vacuum. The central question I consider in this work Is - where does the energy for the excitation of the accelerating detector come from? The accepted response has been that the accelerating force provides the energy. Evaluating the energy carried by the (conformally-invariant massless scalar) field after the Interaction with the detector, however, I find that the detector excitation is compensated by an equal but opposite emission of negative energy. This result suggests that there may be states of lesser energy than that of the Minkowski vacuum. To resolve this paradox, I argue that the emission of a detector following a more realistic trajectory than that of constant acceleration - one that starts and finishes in inertial motion - will in total be positive, although during periods of constant acceleration the detector will still emit negative energy. The Minkowski vacuum retains its status as the field state of lowest energy. The second question I consider is' the response of Unruh's detector in curved spacetime - is it possible to use such a detector to measure the energy carried by the field? In the particular case of a detector following a Killing trajectory, I find that there is a response to the energy of the field, but that there is also an inherent 'noise'. In a two dimensional model spacetime, I show that this 'noise' depends on the detector's acceleration and on the curvature of the spacetime, thereby encompassing previous results of Unruh (1976) and of Gibbons & Hawking (1977).
Results of full models (those containing all random and fixed effects) analysing the effects of the maternal social environment on reproductive traits of adult male offspring. from Increased sperm production linked to competition in the maternal social environment
Creators: name: Hobson, Liane
name: Hurst, Jane L.
name: Stockley, Paula
Publisher: name: The Royal Society
Year: 2020
Subjects: subject: Evolutionary Biology
subject: FOS: Biological sciences
subject: Ecology
subject: 60801 Animal Behaviour

description: This file contains more information on the statistical models created in the manuscript
LaSS: Running Latency Sensitive Serverless Computations at the Edge
Creators: name: Wang, Bin
name: Ali-Eldin, Ahmed
name: Shenoy, Prashant
Publisher: name: arXiv
Year: 2021
Subjects: subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: FOS: Computer and information sciences

description: Serverless computing has emerged as a new paradigm for running short-lived computations in the cloud. Due to its ability to handle IoT workloads, there has been considerable interest in running serverless functions at the edge. However, the constrained nature of the edge and the latency sensitive nature of workloads result in many challenges for serverless platforms. In this paper, we present LaSS, a platform that uses model-driven approaches for running latency-sensitive serverless computations on edge resources. LaSS uses principled queuing-based methods to determine an appropriate allocation for each hosted function and auto-scales the allocated resources in response to workload dynamics. LaSS uses a fair-share allocation approach to guarantee a minimum of allocated resources to each function in the presence of overload. In addition, it utilizes resource reclamation methods based on container deflation and termination to reassign resources from over-provisioned functions to under-provisioned ones. We implement a prototype of our approach on an OpenWhisk serverless edge cluster and conduct a detailed experimental evaluation. Our results show that LaSS can accurately predict the resources needed for serverless functions in the presence of highly dynamic workloads, and reprovision container capacity within hundreds of milliseconds while maintaining fair share allocation guarantees.
description: Accepted to ACM HPDC 2021
Comment on "Removable singularities for solutions of coupled Yang-Mills-Dirac equations" [J. Math. Phys. 47, 103502 (2006)]
Creators: name: Otway, Thomas H.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Mathematical Physics (math-ph)
subject: Analysis of PDEs (math.AP)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 35J60, 70S15

description: A lemma from elliptic theory is used to improve a recent result by Li concerning the removability of an isolated point singularity from solutions of the coupled Yang-Mills-Dirac equations.
description: 3 pages
Extracurricular Activities and Employ-ability Skills with reference to MBA Students of RTM Nagpur University, Nagpur
Creators: name: Shahare, Padmakar
Publisher: name: figshare
Year: 2021
Subjects: subject: 150304 Entrepreneurship
subject: FOS: Economics and business
subject: 150399 Business and Management not elsewhere classified

description: This paper describes the relationship between extracurricular activities and the positive effects on employability skills. Research has documented that by participating in extracurricular activities, students learn life skills that benefit both their academic and professional careers
Monitoring the rotary motors of single FoF1-ATP synthase by synchronized multi channel TCSPC
Creators: name: Zarrabi, N.
name: Dueser, M. G.
name: Ernst, S.
name: Reuter, R.
name: Glick, G. D.
name: Dunn, S. D.
name: Wrachtrup, J.
name: Boersch, M.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Biological Physics (physics.bio-ph)
subject: FOS: Physical sciences

description: Confocal time resolved single-molecule spectroscopy using pulsed laser excitation and synchronized multi channel time correlated single photon counting (TCSPC) provides detailed information about the conformational changes of a biological motor in real time. We studied the formation of adenosine triphosphate, ATP, from ADP and phosphate by FoF1-ATP synthase. The reaction is performed by a stepwise internal rotation of subunits of the lipid membrane-embedded enzyme. Using fluorescence resonance energy transfer, FRET, we detected rotation of this biological motor by sequential changes of intramolecular distances within a single FoF1-ATP synthase. Prolonged observation times of single enzymes were achieved by functional immobilization to the glass surface. The stepwise rotary subunit movements were identified by Hidden Markov Models (HMM) which were trained with single-molecule FRET trajectories. To improve the accuracy of the HMM analysis we included the single-molecule fluorescence lifetime of the FRET donor and used alternating laser excitation to co-localize the FRET acceptor independently within a photon burst. The HMM analysis yielded the orientations and dwell times of rotary subunits during stepwise rotation. In addition, the action mode of bactericidal drugs, i.e. inhibitors of FoF1-ATP synthase like aurovertin, could be investigated by the time resolved single-molecule FRET approach.
description: 12 pages, 9 figures
Neural Predictor based Quantum Architecture Search
Creators: name: Zhang, Shi-Xin
name: Hsieh, Chang-Yu
name: Zhang, Shengyu
name: Yao, Hong
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Variational quantum algorithms (VQAs) are widely speculated to deliver quantum advantages for practical problems under the quantum-classical hybrid computational paradigm in the near term. Both theoretical and practical developments of VQAs share many similarities with those of deep learning. For instance, a key component of VQAs is the design of task-dependent parameterized quantum circuits (PQCs) as in the case of designing a good neural architecture in deep learning. Partly inspired by the recent success of AutoML and neural architecture search (NAS), quantum architecture search (QAS) is a collection of methods devised to engineer an optimal task-specific PQC. It has been proven that QAS-designed VQAs can outperform expert-crafted VQAs under various scenarios. In this work, we propose to use a neural network based predictor as the evaluation policy for QAS. We demonstrate a neural predictor guided QAS can discover powerful PQCs, yielding state-of-the-art results for various examples from quantum simulation and quantum machine learning. Notably, neural predictor guided QAS provides a better solution than that by the random-search baseline while using an order of magnitude less of circuit evaluations. Moreover, the predictor for QAS as well as the optimal ansatz found by QAS can both be transferred and generalized to address similar problems.
description: 10.2 pages + supplemental materials, 10 figures
Theoretical spin dynamics on muonium level-crossing resonance
Creators: name: Yen, Hon Kit
Publisher: name: University of British Columbia
Year: 2010

description: Redfield's theory and the theory of master equations have been reviewed and their applications to muonium spin dynamics discussed. It was found that both theories are equivalent in the Markov limit. In some cases, analytical expressions for relaxation rates are found. In addition, Redfield's theory was applied to describe spin relaxation of muonium-substituted free radicals near level-crossing resonances. Theoretical predictions were compared with experimental data for the C₆F₆-Mu radical and the results suggest there are several relaxation mechanisms involved.
title: Post-Smolt Growth In Atlantic Salmon From North America And The Nature Of Marine Juvenile Nurseries
Creators: name: Friedland, Kevin D.
name: Dutil, Jean-Denis
name: Sadusky, Teresa
Publisher: name: ASC 1998 - N
Year: 2024
Subjects: Ecosystem observation, processes and dynamics

description: No abstracts are to be cited without prior reference to the author.We examined scale samples from historical collections ofpost-smolts rriaoe in the Gulf of St. Lawrence, Canada, with the aim of understanding the role of estuarine and coastal habitats as juvenile nursery for Atlantic salmon. Circuli spacing patterns were extracted from the scales of 580 post-smolts collected in the Gulf during three seasons, 1982-1984. Post-stratification of the samples by collection date within year suggests that in some years post-smolts remain in the Gulf throughout the entire summer growth season whereas in other years only slower growing fish remain in these areas. Growth patterns for Gulf of St. Lawrence post-smolts were compared to patterns for returns from three salmon stocks from the southern end of the range in North America. These data suggest that in some years post-smolt growth in the Gulf is as robust as observed for both the one seawinter (1 SW) and 2SW returns to southern rivers. Post-smolts are believed to utilize oceanic nursery areas generally; thus, comparable growth between the two stock groups-suggests that the Gulf may serve as an important part of the post­smolt nursery range fa some years. The conceptualization of the post-smolt nursery as a continuum between neritic and oceanic areas is essential to evaluating ocean climate and productivity effects impacting salmon recruitment.
Identification, isolation, characterization, and synthesis of impurities of pesticide spirotetramat
Creators: name: Li, Zhaojie
name: Li, Yongze
name: Zhang, Xuebin
name: Zhou, Jing
name: Shen, Sheng
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Biophysics
subject: Biochemistry
subject: Physical Sciences not elsewhere classified
subject: Microbiology
subject: FOS: Biological sciences
subject: Genetics
subject: Molecular Biology
subject: Environmental Sciences not elsewhere classified
subject: Chemical Sciences not elsewhere classified
subject: Biological Sciences not elsewhere classified

description: Research work featured in this article describes the impurity profile of spirotetramat, a widely used broad-spectrum pesticide targeting acetyl-CoA carboxylase. Technical grade spirotetramat from four different sources were analyzed and compared with commercial Movento using UPLC-MS. Seven potential impurities were detected and six of them except for the trans-isomer of spirotetramat were subsequently isolated using preparative HPLC. All impurities were characterized mainly by MS and NMR spectroscopy and their structures were further confirmed by chemical synthesis. The formation of the impurities was described in this report as well.
title: Influence De La Luminosite Nocturne Sur Le Comportement Migratoire De La Civelle D'Anguille (Anguilla Anguilla L.) Dans L'Estuaire De L' Adour
Creators: name: de Casamjor, M.-N.
name: Bru, N.
name: Prouzet, P.
Publisher: name: ASC 1998 - N
Year: 2024
Subjects: Ecosystem observation, processes and dynamics

description: No abstracts are to be cited without prior reference to the author.Glass-eels migratory movements according to environnementals conditions were studied on Adour estuary during the 1997 catch season. These observations took place at night, during flood tide, ten kilometers upstream the sea transversal limit, on a sector of twelves kilometers in length where we observed the propagation of tide. Glass-eels densities (in g per 100m3) were estimated with fine mesh nets on five sampling stations. On each station, 3 longitudinal transects were sampled simultaneously in surface and close to the bottom. Catch abundance between November and Marsh, followed that tendency with a pick in January. These seems to indicate that abundance of glass-eels at the mouth of the river followed a Gaussian curve gives the basic abundance variation. Movement into the water column were induced by moonlight intensity. Glass-eels migrated mainly close to the bottom when turbidity is low and moonlight intensity is high. Moon phases and turbidiy induced modifications in glass-eels behaviour and catchability by the fishery. According to those observations, we can propose a modelisation of vertical migratory scheme of glass-eels in that estuary : high moonlight intensity and low turbidity induced abundance of glass-eels only close to the bottom ; low moonlight intensity and high turbidity induced abundance of glass-eels in all the water column.
Implicit energy regularization of neural ordinary-differential-equation control
Creators: name: Böttcher, Lucas
name: Antulov-Fantulin, Nino
name: Asikis, Thomas
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (cs.LG)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: Although optimal control problems of dynamical systems can be formulated within the framework of variational calculus, their solution for complex systems is often analytically and computationally intractable. In this Letter we present a versatile neural ordinary-differential-equation control (NODEC) framework with implicit energy regularization and use it to obtain neural-network-generated control signals that can steer dynamical systems towards a desired target state within a predefined amount of time. We demonstrate the ability of NODEC to learn control signals that closely resemble those found by corresponding optimal control frameworks in terms of control energy and deviation from the desired target state. Our results suggest that NODEC is capable to solve a wide range of control and optimization problems, including those that are analytically intractable.
description: 5 pages, 3 figures
On Term Rewriting Systems Having a Rational Derivation
Creators: name: Meyer, Antoine
Publisher: name: arXiv
Year: 2007
Subjects: subject: Logic in Computer Science (cs.LO)
subject: FOS: Computer and information sciences

description: Several types of term rewriting systems can be distinguished by the way their rules overlap. In particular, we define the classes of prefix, suffix, bottom-up and top-down systems, which generalize similar classes on words. Our aim is to study the derivation relation of such systems (i.e. the reflexive and transitive closure of their rewriting relation) and, if possible, to provide a finite mechanism characterizing it. Using a notion of rational relations based on finite graph grammars, we show that the derivation of any bottom-up, top-down or suffix systems is rational, while it can be non recursive for prefix systems.
Proton decays in $^{16}$Ne and $^{18}$Mg and isospin-symmetry breaking in carbon isotopes and isotones
Creators: name: Michel, N.
name: Li, J. G.
name: Xu, F. R.
name: Zuo, W.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Proton-rich nuclei possess unique properties in the nuclear chart. Due to the presence of both continuum coupling and Coulomb interaction, phenomena such as halos, Thomas-Ehrman shift, and proton emissions can occur. Experimental data are difficult to be obtained therein, so that theoretical calculations are needed to understand nuclei at drip-lines and guide experimentalists for that matter. In particular, the $^{16}$Ne and $^{18}$Mg isotopes are supposed to be one-proton and/or two-proton emitting nuclei, but associated experimental data are either incomplete or even unavailable. Consequently, we performed Gamow shell model calculations of carbon isotones bearing $A=15\text{-}18$. Isospin-symmetry breaking occurring in carbon isotones and isotopes is also discussed. It is hereby shown that the mixed effects of continuum coupling and Coulomb interaction at drip-lines generate complex patterns in isospin multiplets. Added to that, it is possible to determine the one-proton and two-proton widths of $^{16}$Ne and $^{18}$Mg. Obtained decay patterns are in agreement with those obtained in previous experimental and theoretical works. Moreover, up to the knowledge of authors, this is the first theoretical calculation of binding energy and partial decay widths of $^{18}$Mg in a configuration interaction picture.
description: 12 pages, 4 figures
Supplementary figures showing changes in moist static stability from Response of extreme precipitation to uniform surface warming in quasi-global aquaplanet simulations at high resolution
Creators: name: O’Gorman, P. A.
name: Li, Z.
name: Boos, W. R.
name: Yuval, J.
Publisher: name: The Royal Society
Year: 2021
Subjects: subject: Atmospheric Sciences
subject: FOS: Earth and related environmental sciences
subject: 40107 Meteorology

description: Projections of precipitation extremes in simulations with global climate models are very uncertain in the tropics, in part because of the use of parameterizations of deep convection and model deficiencies in simulating convective organization. Here, we analyse precipitation extremes in high-resolution simulations that are run without a convective parameterization on a quasi-global aquaplanet. The frequency distributions of precipitation rates and precipitation cluster sizes in the tropics of a control simulation are similar to the observed distributions. In response to climate warming, 3 h precipitation extremes increase at rates of up to 9% K−1 in the tropics because of a combination of positive thermodynamic and dynamic contributions. The dynamic contribution at different latitudes is connected to the vertical structure of warming using a moist static stability. When the precipitation rates are first averaged to a daily timescale and coarse-grained to a typical global climate-model resolution prior to calculating the precipitation extremes, the response of the precipitation extremes to warming becomes more similar to what was found previously in coarse-resolution aquaplanet studies. However, the simulations studied here do not exhibit the high rates of increase of tropical precipitation extremes found in projections with some global climate models.This article is part of the discussion meeting issue ‘Intensification of short-duration rainfall extremes and implications for flash flood risks’.
Symbolic Reachability Analysis of Higher-Order Context-Free Processes
Creators: name: Bouajjani, Ahmed
name: Meyer, Antoine
Publisher: name: arXiv
Year: 2007
Subjects: subject: Logic in Computer Science (cs.LO)
subject: FOS: Computer and information sciences

description: We consider the problem of symbolic reachability analysis of higher-order context-free processes. These models are generalizations of the context-free processes (also called BPA processes) where each process manipulates a data structure which can be seen as a nested stack of stacks. Our main result is that, for any higher-order context-free process, the set of all predecessors of a given regular set of configurations is regular and effectively constructible. This result generalizes the analogous result which is known for level 1 context-free processes. We show that this result holds also in the case of backward reachability analysis under a regular constraint on configurations. As a corollary, we obtain a symbolic model checking algorithm for the temporal logic E(U,X) with regular atomic predicates, i.e., the fragment of CTL restricted to the EU and EX modalities.
New Origin of a Bilinear Mass Matrix Form
Creators: name: Haba, Naoyuki
name: Koide, Yoshio
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The charged lepton mass formula can be explained when the masses are propotinal to the squared vacuum expectation values (VEVs) of scalar fields. We introduce U(3) flavor symmetry and its nonet scalar field $Φ$, whose VEV structure plays an essential role for generating the fermion mass spectrum. We can naturally obtain bilinear form of the Yukawa coupling $Y_{ij} \propto \sum_k $ without the non-renormalizable interactions, when the flavor symmetry is broken only through the Yukawa coupling and tadpole terms. We also speculate the possible VEV structure of $$.
description: 8 pages, no figure, presentation changed
title: The Migration Of Glass-Eel And Elvers In The Skagerrak And The Kattegatt
Creators: name: Westerberg, Håkan
Publisher: name: ASC 1998 - N
Year: 2024
Subjects: Ecosystem observation, processes and dynamics

description: No abstracts are to be cited without prior reference to the author.The migration of glass-eel through the North Sea to the Kattegatt and the. Baltic has been studied using data from the Young Fish Survey each February and from a monitoring program of the cooling water intake to a nuclear power plant in the Kattegatt during the period 1976 to 1997. The distribution of glass-eel as shown by 6000 IKMT and :MIK. hauls .indicate that the migration route follows the Atlantic water inflow through the northern approaches ofthe North Sea. In February the centre of distribution usually is in the Kattegatt already, but in some cases the centre is found in the Skagerrak: or-in the eastern central North Sea. The delay to the peak of glass eel abundance in the Kattegatt coastal water is typically· 6 weeks and is independent of how far to the east the offshore distribution has. reached in February. The correlation between the offshore abundance and the count of glass-eels and elvers in Ka.ttegatt is weak. This is·explained by meteorological effetts.on the circulation between the Skagerrak and the Kattegatt
Flatband-Induced Itinerant Ferromagnetism in RbCo$_2$Se$_2$
Creators: name: Huang, Jianwei
name: Wang, Zhicai
name: Pang, Hongsheng
name: Wu, Han
name: Cao, Huibo
name: Mo, Sung-Kwan
name: Rustagi, Avinash
name: Kemper, A. F.
name: Wang, Meng
name: Yi, Ming
name: Birgeneau, R. J.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: $A$Co$_2$Se$_2$ ($A$=K,Rb,Cs) is a homologue of the iron-based superconductor, $A$Fe$_2$Se$_2$. From a comprehensive study of RbCo$_2$Se$_2$ via measurements of magnetization, transport, neutron diffraction, angle-resolved photoemission spectroscopy, and first-principle calculations, we identify a ferromagnetic order accompanied by an orbital-dependent spin-splitting of the electronic dispersions. Furthermore, we identify the ordered moment to be dominated by a $d_{x^2-y^2}$ flatband near the Fermi level, which exhibits the largest spin splitting across the ferromagnetic transition, suggesting an itinerant origin of the ferromagnetism. In the broader context of the iron-based superconductors, we find this $d_{x^2-y^2}$ flatband to be a common feature in the band structures of both iron-chalcogenides and iron-pnictides, accessible via heavy electron doping.
description: 8 pages, 7 figures, accepted by Phys. Rev. B
Preparing an ESO proposal
Creators: name: Kervella, Pierre
name: Garcia, Paulo J. V.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Preparing observing proposals is a classical exercise in an observational astronomer's life. In this paper, we summarize the general requirements to write a good proposal for the ESO telescopes, and eventually obtain telescope time. We detail in particular the different proposal types, how they are evaluated by ESO, what they should contain and what to avoid. The advice given in the present paper are applicable to observing proposals for the AMBER and MIDI instruments of the VLTI, but also to other ESO instruments, and to some extent to other observatories.
description: 13 pages, to be published in the Proceedings of the 2006 Euro Summer School "Observation and Data Reduction with the VLTI", 4-16 June 2006, Goutelas (France), http://vltischool.obs.ujf-grenoble.fr/
Impedance-mismatch experiments using laser-driven shocks
Creators: name: Chiu, Gordon S. Y.
Publisher: name: University of British Columbia
Year: 2010

description: A series of impedance-mismatch experiments with aluminum-gold targets has been performed. These experiments are used to probe the equation of state (EOS) of gold at high pressure. By measuring the shock breakout time from the target rear surface, the shock trajectory is determined and found to be in good agreement with equation of state predictions. In addition, temperatures derived from temporally resolved luminescence measurements of the shocked target rear surface are compared with two different equation of state theoretical models. Our results indicate that whereas the SESAME (from Los Alamos National Laboratory) EOS seems to overestimate the shock temperature, the equation of state of gold which incoporated both the solid and liquid phases gives much closer agreement with observations. The measurements of gold at a shock pressure of ~ 6 Mbar and temperature of ~ 17500 K also represent the first study of gold under shock melting.
Supplementary figures showing changes in moist static stability from Response of extreme precipitation to uniform surface warming in quasi-global aquaplanet simulations at high resolution
Creators: name: O’Gorman, P. A.
name: Li, Z.
name: Boos, W. R.
name: Yuval, J.
Publisher: name: The Royal Society
Year: 2020
Subjects: subject: Atmospheric Sciences
subject: FOS: Earth and related environmental sciences
subject: 40107 Meteorology

description: Projections of precipitation extremes in simulations with global climate models are very uncertain in the tropics, in part because of the use of parameterizations of deep convection and model deficiencies in simulating convective organization. Here, we analyse precipitation extremes in high-resolution simulations that are run without a convective parameterization on a quasi-global aquaplanet. The frequency distributions of precipitation rates and precipitation cluster sizes in the tropics of a control simulation are similar to the observed distributions. In response to climate warming, 3 h precipitation extremes increase at rates of up to 9% K−1 in the tropics because of a combination of positive thermodynamic and dynamic contributions. The dynamic contribution at different latitudes is connected to the vertical structure of warming using a moist static stability. When the precipitation rates are first averaged to a daily timescale and coarse-grained to a typical global climate-model resolution prior to calculating the precipitation extremes, the response of the precipitation extremes to warming becomes more similar to what was found previously in coarse-resolution aquaplanet studies. However, the simulations studied here do not exhibit the high rates of increase of tropical precipitation extremes found in projections with some global climate models.This article is part of the discussion meeting issue ‘Intensification of short-duration rainfall extremes and implications for flash flood risks’.