cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Preliminary Screening of Microplastic Contamination in Commercial Spotted Babylon (Babylonia areolata) and Green Mussels (Perna viridis): A Case Study of Muang Lampang District, Lampang Province, Thailand
Creators: name: Manita Wannachai
name: Ketmani Mueansap
name: Pradabduang Kiattisaksiri
name: Yanasinee Suma
Publisher: name: Thai Society of Higher Education Institutes on Environment
Year: 2024
Subjects: Food contamination
Green mussels
Microplastic
Plastic
Spotted babylon

description: EnvironmentAsia, 17, 2, 170-183
Small-scale shear: Peeling off diffuse subhalos with gravitational waves
Creators: name: Choi, Han Gil
name: Park, Chanung
name: Jung, Sunghoon
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Subhalos at subgalactic scales ($M\lesssim 10^7 M_\odot$ or $k\gtrsim 10^3 \,{\rm Mpc}^{-1}$) are pristine test beds of dark matter (DM). However, they are too small, diffuse and dark to be visible, in any existing observations. In this paper, we develop a complete formalism for weak and strong diffractive lensing, which can be used to probe such subhalos with chirping gravitational waves (GWs). Also, we show that Navarro-Frenk-White(NFW) subhalos in this mass range can indeed be detected individually, albeit at a rate of ${\cal O}(10)$ or less per year at BBO and others limited by small merger rates and large required SNR $\gtrsim 1/γ(r_0) \sim 10^3$. It becomes possible as NFW scale radii $r_0$ are of the right size comparable to the GW Fresnel length $r_F$, and unlike all existing probes, their lensing is more sensitive to lighter subhalos. Remarkably, our formalism further reveals that the frequency dependence of weak lensing (which is actually the detectable effect) is due to shear $γ$ at $r_F$. Not only is it consistent with an approximate scaling invariance, but it also offers a new way to measure the mass profile at a successively smaller scale of chirping $r_F \propto f^{-1/2}$. Meanwhile, strong diffraction that produces a blurred Einstein ring has a universal frequency dependence, allowing only detections. These are further demonstrated through semianalytic discussions of power-law profiles. Our developments for a single lens can be generalized and will promote diffractive lensing to a more concrete and promising physics in probing DM and small-scale structures.
description: 21 pages, 15 figures
A Thousand and One Nova Outbursts
Creators: name: Epelstain, N.
name: Yaron, O.
name: Kovetz, A.
name: Prialnik, D.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Multicycle nova evolution models have been calculated over the past twenty years, the number being limited by numerical constraints. Here we present a long-term evolution code that enables a continuous calculation through an unlimited number of nova cycles for an unlimited evolution time, even up to (or exceeding) a Hubble time. Starting with two sets of the three independent nova parameters -- the white dwarf mass, the temperature of its isothermal core, and the rate of mass transfer on to it -- we have followed the evolution of two models, with initial masses of 1 and 0.65 solar masses, accretion rates (constant throughout each calculation) of 1e-11 and 1e-9 solar-masses/yr, and relatively high initial temperatures (as they are likely to be at the onset of the outburst phase), through over 1000 and over 3000 cycles, respectively. The results show that although on the short-term consecutive outbursts are almost identical, on the long-term scale the characteristics change. This is mainly due to the changing core temperature, which decreases very similarly to that of a cooling white dwarf for a time, but at a slower rate thereafter. As the white dwarf's mass continually decreases, since both models lose more mass than they accrete, the central pressure decreases accordingly. The outbursts on the massive white dwarf change gradually from fast to moderately fast, and the other characteristics (velocity, abundance ratios, isotopic ratios) change, too. Very slowly, a steady state is reached, where all characteristics, both in quiescence and in outburst, remain almost constant. For the less massive white dwarf accreting at a high rate, outbursts are similar throughout the evolution.
description: To be published in MNRAS
Thermal impacts on the properties of nuclear matter and young neutron star
Creators: name: Kumar, Ankit
name: Das, H. C.
name: Bhuyan, M.
name: Patra, S. K.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We present a methodical study of the thermal and nuclear properties for the hot nuclear matter using relativistic-mean field theory. We examine the effects of temperature on the binding energy, pressure, thermal index, symmetry energy, and its derivative for the symmetric nuclear matter using temperature-dependent relativistic mean-field formalism for the well-known G2$^{*}$ and recently developed IOPB-I parameter sets. The critical temperature for the liquid-gas phase transition in an asymmetric nuclear matter system has also been calculated and collated with the experimentally available data. We investigate the approach of the thermal index as a function of nucleon density in the wake of relativistic and non-relativistic formalism. The computation of neutrino emissivity through the direct Urca process for the supernovae remnants has also been performed, which manifests some exciting results about the thermal stabilization and evolution of the newly born proto-neutron star. The central temperature and the maximum mass of the proto-neutron star have also been calculated for different entropy values.
description: 11 pages, 8 figures, aacpeted for publication in Nuclear Physics A
Influence of Work Environment and Health Promotion Behaviors on Pre-Hypertension in Late Adulthood
Creators: name: Arunrat Puncha Glingasorn
name: Kittipong Sornlorm
Publisher: name: Thai Society of Higher Education Institutes on Environment
Year: 2024
Subjects: Pre-hypertension
Health promotion behaviors
Work environment
Generalized Linear Mixed Model
Late Adulthood

description: EnvironmentAsia, 17, 2, 184-195
Dose-response functions and surrogate models for exploring social contagion in the Copenhagen Networks Study
Creators: name: Donges, Jonathan F.
name: Lochner, Jakob H.
name: Kitzmann, Niklas H.
name: Heitzig, Jobst
name: Lehmann, Sune
name: Wiedermann, Marc
name: Vollmer, Jürgen
Publisher: name: arXiv
Year: 2021
Subjects: subject: Physics and Society (physics.soc-ph)
subject: FOS: Physical sciences

description: Spreading dynamics and complex contagion processes on networks are important mechanisms underlying the emergence of critical transitions, tipping points and other nonlinear phenomena in complex human and natural systems. Increasing amounts of temporal network data are now becoming available to study such spreading processes of behaviours, opinions, ideas, diseases and innovations to test hypotheses regarding their specific properties. To this end, we here present a methodology based on dose-response functions and hypothesis testing using surrogate data models that randomise most aspects of the empirical data while conserving certain structures relevant to contagion, group or homophily dynamics. We demonstrate this methodology for synthetic temporal network data of spreading processes generated by the adaptive voter model. Furthermore, we apply it to empirical temporal network data from the Copenhagen Networks Study. This data set provides a physically-close-contact network between several hundreds of university students participating in the study over the course of three months. We study the potential spreading dynamics of the health-related behaviour "regularly going to the fitness studio" on this network. Based on a hierarchy of surrogate data models, we find that our method neither provides significant evidence for an influence of a dose-response-type network spreading process in this data set, nor significant evidence for homophily. The empirical dynamics in exercise behaviour are likely better described by individual features such as the disposition towards the behaviour, and the persistence to maintain it, as well as external influences affecting the whole group, and the non-trivial network structure. The proposed methodology is generic and promising also for applications to other temporal network data sets and traits of interest.
description: 26 pages, 13 figures, 1 table
Extreme UV generation from molecules in intense Ti:Sapphire light
Creators: name: McCann, J F
name: Peng, Liang-You
name: Williams, I D
name: Taylor, K T
name: Dundas, D
Publisher: name: arXiv
Year: 2006
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: We simulate the dynamics of H2+ and HD+ by direct solution of the time-dependent Schroedinger equation for the electronic and nuclear motion for the interaction of intense femtosecond pulses. On these timescales the rotational motion, even for such light molecules, is frozen. Therefore it is a reasonable assumption that the nuclear alignment is fixed during the pulse interaction and that rotation can be neglected. In terms of vibrational relaxation, and since the nuclei are light, vibration will be important over femtosecond timescales. Although homonuclear diatomics are IR-inactive, in an intense field one can create vibrational excitation through continuum coupling. To show the effect of vibration, consider a first approximation in which the nuclei are infinitely massive so they maintain their positions at a fixed bond length of R=2 a.u., throughout the process.
Fermions in three-dimensional spinfoam quantum gravity
Creators: name: Fairbairn, Winston
Publisher: name: arXiv
Year: 2006
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We study the coupling of massive fermions to the quantum mechanical dynamics of spacetime emerging from the spinfoam approach in three dimensions. We first recall the classical theory before constructing a spinfoam model of quantum gravity coupled to spinors. The technique used is based on a finite expansion in inverse fermion masses leading to the computation of the vacuum to vacuum transition amplitude of the theory. The path integral is derived as a sum over closed fermionic loops wrapping around the spinfoam. The effects of quantum torsion are realised as a modification of the intertwining operators assigned to the edges of the two-complex, in accordance with loop quantum gravity. The creation of non-trivial curvature is modelled by a modification of the pure gravity vertex amplitudes. The appendix contains a review of the geometrical and algebraic structures underlying the classical coupling of fermions to three dimensional gravity.
description: 40 pages, 3 figures, version accepted for publication in GERG
"How do you integrate Indian culture into your life?" : second generation Indo-Canadians and the construction of "Indian culture" in Vancouver, Canada
Creators: name: Nodwell, Evelyn
Publisher: name: University of British Columbia
Year: 2008

description: This dissertation is a case study of one small segment of what is commonly referred to as the "Indian community" in Vancouver, focusing particularly on its second-generation youth members. The study examines members' constructions of "Indian" identity, "Indian community," and "Indian culture." The first generation members of this population segment are primarily upper to middle class Hindu speaking Hindus from north India who migrated to Canada as students and independent class immigrants between 1955 and 1975 and are currently practicing professional and business people. They represent a minority of the Indian population in Vancouver by virtue of class, urban background, and language-regional-cultural affiliation. I argue, however, that this case study is an important addition to literature about South Asians in Canada both because this population segment is absent from existing literature, and because many of these individuals play leading roles in Vancouver's Indian community. Canadian literature which pertains to second generation South Asian youth emphasizes issues of assimilation, inter-generational conflict and inter-cultural identity confusion. This case study diverges from those issues in order to provide a fuller appreciation of relatively neglected aspects of youth lives. It describes how youth act as agents in the construction of their own lives and documents their experiences, visions, and initiatives. In doing so, the dissertation documents processes by which culture is constructed, conceptually and in practice. The research draws on a number of theoretical perspectives including symbolic interactionism (Blumer 1969), structuration theory (Giddens 1976, 1979, 1984), "conscious models" (Ward 1965) and reference group identification (Merton 1964; Shibutani 1955). Data is derived from participant observation, interviews, and group discussions. Youth respondents express that the challenge for them, a different one from that of their parents whose formative years were spent in South Asia or East Africa, is how to integrate Indian culture into their Canadian lives. My study concludes that active phrases used by respondents, such as, "trying to cope," "having the freedom to choose,” and "integrating Indian culture" are more accurate express-ions of the experiences of youth respondents than the passive metaphor commonly applied to South Asian youth of being “caught between two cultures."
Two-cover descent on hyperelliptic curves
Creators: name: Bruin, Nils
name: Stoll, Michael
Publisher: name: arXiv
Year: 2008
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 11G30; 14H40

description: We describe an algorithm that determines a set of unramified covers of a given hyperelliptic curve, with the property that any rational point will lift to one of the covers. In particular, if the algorithm returns an empty set, then the hyperelliptic curve has no rational points. This provides a relatively efficiently tested criterion for solvability of hyperelliptic curves. We also discuss applications of this algorithm to curves of genus 1 and to curves with rational points.
description: 19 pages, 1 figure
A Number of Nearby Moving Groups may be Fragments of Dissolving Open Clusters
Creators: name: Gagné, Jonathan
name: Faherty, Jacqueline K.
name: Moranta, Leslie
name: Popinchalk, Mark
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We propose that fourteen co-moving groups of stars uncovered by Kounkel & Covey (2019) may be related to known nearby moving groups and bridge those and nearby open clusters with similar ages and space velocities. This indicates that known nearby moving groups may be spatially much more extended than previously though, and some of them might be parts of tidal tails around the cores of known open clusters, reminiscent of those recently found around the Hyades and a handful of other nearby clusters. For example, we find that both the nearby Carina and Columba associations may be linked to Theia 208 from Kounkel & Covey (2019) and together form parts of a large tidal tail around the Platais 8 open cluster. The AB Doradus moving group and Theia 301 may form a trailing tidal tail behind the Pleiades open cluster, with hints of a possible leading tidal tail in Theia 369. We similarly find that IC 2391 and its tidal tails identified by Meingast et al. (2021) may be extended by the nearby Argus association and are possibly further extended by Theia 115. The nearby Octans and Octans-Near associations, as well as Theia 94 and 95, may form a large tidal tail leading the poorly studied Platais 5 open cluster candidate. While a preliminary analysis of Gaia color-magnitude sequences hint that these structures are plausibly related, more observational evidence is still required to corroborate their consistent ages and space velocities. These observations may change our current understanding of nearby moving groups and the different pathways through which they can form. While some moving groups may have formed loosely in extended star-formation events with rich spatial structure, others may in fact correspond to the tidal tails of nearby open clusters.
description: This is the Accepted Manuscript version of an article accepted for publication in Astrophysical Journal Letters. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. This Accepted Manuscript is published under a CC BY licence
The dependence of evanescent wave polarization on the losses of guided optical modes
Creators: name: Perea-Puente, Sinuhé
name: Rodríguez-Fortuño, Francisco J.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Spin-momentum locking of evanescent waves describes the relationship between the propagation constant of an evanescent mode and the polarization of its electromagnetic field, giving rise to applications in light nano-routing and polarimetry among many others. The use of complex numbers in physics is a powerful representation in areas such as quantum mechanics or electromagnetism; it is well known that a lossy waveguide can be modelled with the addition of an imaginary part to the propagation constant. Here we explore how these losses are entangled with the polarization of the associated evanescent tails for the waveguide, revealing a well-defined mapping between waveguide losses and the Poincaré sphere of polarizations, in what could be understood as a "polarization-loss locking" of evanescent waves. We analyse the implications for near-field directional coupling of sources to waveguides, as optimized dipoles must take into account the losses for a perfectly unidirectional excitation. We also reveal the potential advantage of calculating the angular spectrum of a source defined in a complex, rather than the traditionally purely real, transverse wavevector space formalism.
description: 8 pages, 4 figures
Twisted Yangians and Mickelsson Algebras I
Creators: name: Khoroshkin, Sergey
name: Nazarov, Maxim
Publisher: name: arXiv
Year: 2007
Subjects: subject: Representation Theory (math.RT)
subject: Quantum Algebra (math.QA)
subject: FOS: Mathematics
subject: 17B35; 81R50

description: We introduce an analogue of the composition of the Cherednik and Drinfeld functor for twisted Yangians. Our definition is based on the Howe duality, and originates from the centralizer construction of twisted Yangians due to Olshanski. Using our functor, we establish a correspondence between intertwining operators on the tensor products of certain modules over twisted Yangians, and the extremal cocycle on the hyperoctahedral group.
description: final version
Quantum Contextuality and Locality
Creators: name: Σαριγκιόλης, Λάζαρος Θωμά
Publisher: name: Aristotle University of Thessaloniki
Year: 2020

description: In this master thesis we studied the concepts of quantum contextuality and locality. At first there is a presentation of the notions of locality and quantum contextuality, followed by the presentation of the most important theorems related to the subject, namely the Bell theorem and the Kochen-Specker theorem. Afterwards, we approach the notions of locality and contextuality from a graph-theoretical point of view, and we proceed by showing some important statements and conditions about them. Finally, we study the monogamous relations that may appear between the corresponding local and non-contextual test inequalities, and we finish the thesis with a presentation of some interesting examples and applications that utilize the aforementioned monogamous relations.
description: Στην παρούσα διπλωματική εργασία μελετήσαμε τις έννοιες του κβαντικού πλαισίου και της τοπικότητας. Αρχικά παραθέτουμε μία παρουσίαση των εννοιών και ακολουθεί μια παρουσίαση των σημαντικότερων θεωρημάτων σχετικών με το θέμα, δηλαδή του θεωρήματος του Bell και του θεωρήματος των Kochen και Specker. Κατόπιν, προσεγγίζουμε τις προαναφερθείσες έννοιες από την σκοπιά της θεωρίας γράφων, και συνεχίζουμε υποδεικνύοντας τα σημαντικότερα συμπεράσματα και προϋποθέσεις γύρω από την ύπαρξη τοπικότητας και πλαισιακών σχέσεων. Τέλος, διεξάγουμε μία μελέτη σχετικά με τις μονογαμικές σχέσεις που δύνανται να εμφανιστούν ανάμεσα στις ανισότητες ανίχνευσης μη-τοπικών και πλαισιακών φαινομένων, και κλείνουμε παρουσιάζοντας μερικά ενδιαφέροντα παραδείγματα και εφαρμογές που εκμεταλλεύονται τις παραπάνω μονογαμικές σχέσεις.
Emotion Dynamics in Movie Dialogues
Creators: name: Hipson, Will E.
name: Mohammad, Saif M.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computation and Language (cs.CL)
subject: FOS: Computer and information sciences

description: Emotion dynamics is a framework for measuring how an individual's emotions change over time. It is a powerful tool for understanding how we behave and interact with the world. In this paper, we introduce a framework to track emotion dynamics through one's utterances. Specifically we introduce a number of utterance emotion dynamics (UED) metrics inspired by work in Psychology. We use this approach to trace emotional arcs of movie characters. We analyze thousands of such character arcs to test hypotheses that inform our broader understanding of stories. Notably, we show that there is a tendency for characters to use increasingly more negative words and become increasingly emotionally discordant with each other until about 90 percent of the narrative length. UED also has applications in behavior studies, social sciences, and public health.
description: 19 pages, 7 figures
The Effect of Teaching Science Based on Science, Technology and Societyon Science Achievement and Problem Solving Abilities of Mathayomsuksa II Students
Creators: name: Thouchaya  Udomrak
Publisher: name: Graduate School;Nakhon Sawan Rajabhat University
Year: 2014
Subjects: Science based on science, Technology and Society, Achievement, Problem Solving Abilities

description: 26, 9, SOCIAL SCIENCES RESEARCH AND ACADEMIC JOURNAL
Attosecond signatures in photodissociation by an intense Ti:Sapphire pulse
Creators: name: McCann, J F
name: Peng, Liang-You
name: Williams, I D
Publisher: name: arXiv
Year: 2006
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: In our model the electron dynamics are described by a two-state approximation. This might appear a rough approximation since it neglects coupling through excited electronic states and ionization channels. However at high intensity (laser fields equivalent to the Coulomb force) and long wavelength (photon energy much lower than the ionization potential) the dissociation process occurs by adiabatic polarization involving the lowest electronic states. For the experiment in question, with intensities above 10x14 W cm-2 and photon energies of 1.5eV, such an approach is well justified. More contentious is the neglect of rotational heating (that is molecular realignment) during the pulse. However, this process is essentially an internal relaxation and for a 50fs pulse it has a small effect. To calculate the dissociation spectrum, we have applied discretization methods developed for photoionization of molecules4) to solve the quantum equations in a dual configuration and momentum space. Technical details are discussed in the paper by Peng et al.
description: 2 pages
Low precision logarithmic number systems: Beyond base-2
Creators: name: Alam, Syed Asad
name: Garland, James
name: Gregg, David
Publisher: name: arXiv
Year: 2021
Subjects: subject: Numerical Analysis (math.NA)
subject: Signal Processing (eess.SP)
subject: FOS: Mathematics
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: C.m; G.0
subject: 65G50

description: Logarithmic number systems (LNS) are used to represent real numbers in many applications using a constant base raised to a fixed-point exponent making its distribution exponential. This greatly simplifies hardware multiply, divide and square root. LNS with base-2 is most common, but in this paper we show that for low-precision LNS the choice of base has a significant impact. We make four main contributions. First, LNS is not closed under addition and subtraction, so the result is approximate. We show that choosing a suitable base can manipulate the distribution to reduce the average error. Second, we show that low-precision LNS addition and subtraction can be implemented efficiently in logic rather than commonly used ROM lookup tables, the complexity of which can be reduced by an appropriate choice of base. A similar effect is shown where the result of arithmetic has greater precision than the input. Third, where input data from external sources is not expected to be in LNS, we can reduce the conversion error by selecting a LNS base to match the expected distribution of the input. Thus, there is no one base which gives the global optimum, and base selection is a trade-off between different factors. Fourth, we show that circuits realized in LNS require lower area and power consumption for short word lengths.
description: 22 pages, 12 figures, 8 tables, conference extension
Integral Biomathics: A Post-Newtonian View into the Logos of Bios (On the New Meaning, Relations and Principles of Life in Science)
Creators: name: Simeonov, Plamen L.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Neural and Evolutionary Computing (cs.NE)
subject: Computational Complexity (cs.CC)
subject: FOS: Computer and information sciences
subject: F.1.1; F.4.0; H.1.1; I.2.0; J.3

description: This work is an attempt for a state-of-the-art survey of natural and life sciences with the goal to define the scope and address the central questions of an original research program. It is focused on the phenomena of emergence, adaptive dynamics and evolution of self-assembling, self-organizing, self-maintaining and self-replicating biosynthetic systems viewed from a newly-arranged perspective and understanding of computation and communication in the living nature.
description: 85 pages, 6 figures
Extending an Information Extraction tool set to Central and Eastern European languages
Creators: name: Ignat, Camelia
name: Pouliquen, Bruno
name: Ribeiro, Antonio
name: Steinberger, Ralf
Publisher: name: arXiv
Year: 2006
Subjects: subject: Computation and Language (cs.CL)
subject: Information Retrieval (cs.IR)
subject: FOS: Computer and information sciences
subject: H.3.1; H.3.6; H.3.4

description: In a highly multilingual and multicultural environment such as in the European Commission with soon over twenty official languages, there is an urgent need for text analysis tools that use minimal linguistic knowledge so that they can be adapted to many languages without much human effort. We are presenting two such Information Extraction tools that have already been adapted to various Western and Eastern European languages: one for the recognition of date expressions in text, and one for the detection of geographical place names and the visualisation of the results in geographical maps. An evaluation of the performance has produced very satisfying results.
description: 7 pages
Flavor Twisted Boundary Conditions and Isovector Form Factors
Creators: name: Tiburzi, Brian C.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We use vector flavor symmetry to relate form factors of isospin changing operators to isovector form factors. Flavor twisted boundary conditions in lattice QCD thus allow isovector form factors of twist-two operators, e.g, to be computed at continuous values of the momentum transfer. These twisted boundary conditions, moreover, are implemented only in the valence sector. Effects of the finite volume must be addressed to extract isovector moments and radii at zero lattice momentum. As an example, we use chiral perturbation theory to assess the volume effects in extracting the isovector magnetic moment of the nucleon from simulations with twisted boundary conditions.
description: 15pp
Role of triple excitations in calculating different properties of Ba+
Creators: name: Porsev, S. G.
name: Safronova, M. S.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We carried out calculations of the energies, hyperfine structure constants and electric-dipole transiton amplitudes for the low-lying states of Ba+ in the framework of the relativistic linearized coupled-cluster single double (LCCSD) and coupled-cluster single double (valence) triple (CCSDvT) methods. Taking into account that an iterative inclusion of the valence triples into consideration is a complicated and computationally demanding process we study the effects of computational restriction on the final results. We also present a detailed study of various corrections to all calculated properties and use our results to formulate several broad rules that can be used in future calculations of the elements where experimental data are scarce and correct theoretical predictions are highly important.
description: 8 pages, 1 fugure
Bemerkungen zur "kalten Fusion"
Creators: name: Kuehne, Rainer W.
Publisher: name: arXiv
Year: 2006
Subjects: subject: General Physics (physics.gen-ph)
subject: Popular Physics (physics.pop-ph)
subject: FOS: Physical sciences

description: Steven Jones et al. reported to have observed nuclear fusion at room temperature. They observed this "cold fusion" by electrolyzing heavy water. Later experiments confirmed these observations. These experiments confirmed the generation of strong electric fields within the deuterided metals. These electric fields accelerate the deuterons to keV energies and allow the observed nuclear fusion. Roman Sioda and I suggested a theoretical description of this nuclear fusion. Our "extended micro hot fusion" scenario explains how nuclear fusion can be generated over a long time within deuterided metals. Moreover we predicted the explosion of large pieces of deuterided metals. This article reviews the "cold fusion" work of Steven Jones et al. and discusses the fracto-fusion scenario. I show that the extended micro hot fusion scenario can explain the observed neutron emissions, neutron bursts, and heat bursts.
description: text in German, review, no figures
Expectations and Satisfaction of Employees to Public Relations Media: Case Study of Thai Summit Hardness Public Company Limited and Subsidiaries
Creators: name: Chanida  Insombat
Publisher: name: Graduate School;Nakhon Sawan Rajabhat University
Year: 2014
Subjects: Expectations, Satisfaction, Public Relations Media

description: 26, 9, SOCIAL SCIENCES RESEARCH AND ACADEMIC JOURNAL
15th World Conference on Titanium Chapter 2: Aerospace Applications
Creators: name: IOM3
Publisher: name: F1000 Research Limited
Year: 2024

description: RECENT ADVANCES IN TITANIUM ALLOY EXTRUSIONS FOR AEROSPACE APPLICATIONS

TECHNOLOGY CAPABILITY STUDY OF LASER POWDER BED FUSION TO PRODUCE LARGE CRITICAL AEROSPACE STRUCTURES IN Ti-6Al-4V



TENSILE DUCTILITY AT ROOM TEMPERATURE IN HIGH-TEMPERATURE TITANIUM ALLOYS USED FOR AEROENGINE APPLICATIONS



COMPETITOR TITANIUM-CONTAINING HIGH ENTROPY ALLOYS TO HAYNES 230 ALLOY FOR AEROENGINE APPLICATIONS



On the mechanism and prediction of fatigue crack initiation in a near-alpha titanium alloy

Large-scale 3D electron backscatter diffraction study of alpha lath microstructures in a two-phase titanium alloy



SELECTIVE LASER MELTING PROCESS CHAIN FOR DEVELOPMENT OF A Ti6Al4V(ELI) NOSE WHEEL FORK OF A LIGHT AIRCRAFT



Additive Manufacturing of Titanium Aerospace and Space Components



Microstructure and crystallographic texture of a near-beta titanium alloy fabricated by laser powder bed fusion with a flat-top laser beam



INVESTIGATION OF THE DWELL FATIGUE CRACK INITIATION MECHANISM IN A NEAR Α TITANIUM ALLOY TI6321



THEORETICAL INVESTIGATION OF OXIDATION MECHANISM IN Ti AND ITS ALLOYS 



DEVELOPMENT OF COLD-ROLLED STRIPS OF V-FREE α+β TITANIUM ALLOY TI–5AL–1FE



Evaluation of the role of MTR on cold dwell fatigue in Ti-6Al-4V alloys by DIC measurement



Influence of Chemical Composition and Forging Process on Mechanical Properties and Microstruture of TA15 Alloy



ADVANCES IN THE DEVELOPMENT OF DIRECT ENERGY DEPOSITION FOR THE MANUFACTURING OF AERONAUTICAL ELEMENTARY PARTS



Exploring the structure and properties of nanoscale precipitates in a high-strength titanium-based system



Effects of alloying on slip intermittency and localisation in α-Ti



Near-to-net titanium extrusions as a substitute for aerospace plate and forgings



Technological advancements in manufacture of near-to-net extrusions for aerospace applications



Metallurgical Investigation of a Ti6242 disk with fatigue progression from sub-surface micro-void



CONTINUOUS, INDUSTRY-WIDE EFFORTS TO IMPROVE THE SAFETY OF TITANIUM ALLOY TURBINE ENGINE ROTORS
Radial and Nonradial Oscillation Modes in Rapidly Rotating Stars
Creators: name: Lovekin, C. C.
name: Deupree, R. G.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Radial and nonradial oscillations offer the opportunity to investigate the interior properties of stars. We use 2D stellar models and a 2D finite difference integration of the linearized pulsation equations to calculate non-radial oscillations. This approach allows us to directly calculate the pulsation modes for a distorted rotating star without treating the rotation as a perturbation. We are also able to express the finite difference solution in the horizontal direction as a sum of multiple spherical harmonics for any given mode. Using these methods, we have investigated the effects of increasing rotation and the number of spherical harmonics on the calculated eigenfrequencies and eigenfunctions and compared the results to perturbation theory. In slowly rotating stars, current methods work well, and we show that the eigenfunction can be accurately modelled using 2nd order perturbation theory and a single spherical harmonic. We use 10 Msun models with velocities ranging from 0 to 420 km/s (0.89 Omega_c) and examine low order p modes. We find that one spherical harmonic remains reasonable up to a rotation rate around 300km s^{-1} (0.69 Omega_c) for the radial fundamental mode, but can fail at rotation rates as low as 90 km/s (0.23 Omega_c) for the 2H mode or l = 2 p_2 mode, based on the eigenfrequencies alone. Depending on the mode in question, a single spherical harmonic may fail at lower rotation rates if the shape of the eigenfunction is taken into consideration. Perturbation theory, in contrast, remains valid up to relatively high rotation rates for most modes. We find the lowest failure surface equatorial velocity is 120 km/s (0.30 Omega_c) for the l = 2 p_2 mode, but failure velocities between 240 and 300 km/s (0.58-0.69 Omega_c)are more typical.
description: accepted for publication in ApJ
Upper limits to surface force disturbances on LISA proof masses and the possibility of observing galactic binaries
Creators: name: Carbone, Ludovico
name: Ciani, Giacomo
name: Dolesi, Rita
name: Hueller, Mauro
name: Tombolato, David
name: Vitale, Stefano
name: Weber, William Joseph
name: Cavalleri, Antonella
Publisher: name: arXiv
Year: 2006
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We report on the measurement of parasitic surface force noise on a hollow replica of a LISA (Laser Interferometer Space Antenna for the observation of gravitational waves) proof mass surrounded by a faithful representation of its in flight surroundings, namely the capacitive sensor used to detect proof-mass motion. Parasitic forces are detected through the corresponding torque exerted on the proof mass and measured with a torsion pendulum in the frequency range 0.1 30 mHz. The sensor electrodes, electrode housing and associated readout electronics have the same nominal design as for the flight hardware, including 4 mm gaps around the proof mass along the sensitive laser interferometry axis. We show that the measured upper limit for surface forces would allow detection of a number of galactic binaries signals with signal to noise ratio up to approximately 40 for 1 year integration. We also discuss how the flight test under development, LISA Pathfinder, will substantially improve this limit, approaching the performance required for LISA.
description: 3 Figures. Submitted to Physical Review Letters
Fisher Information in Noisy Intermediate-Scale Quantum Applications
Creators: name: Meyer, Johannes Jakob
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The recent advent of noisy intermediate-scale quantum devices, especially near-term quantum computers, has sparked extensive research efforts concerned with their possible applications. At the forefront of the considered approaches are variational methods that use parametrized quantum circuits. The classical and quantum Fisher information are firmly rooted in the field of quantum sensing and have proven to be versatile tools to study such parametrized quantum systems. Their utility in the study of other applications of noisy intermediate-scale quantum devices, however, has only been discovered recently. Hoping to stimulate more such applications, this article aims to further popularize classical and quantum Fisher information as useful tools for near-term applications beyond quantum sensing. We start with a tutorial that builds an intuitive understanding of classical and quantum Fisher information and outlines how both quantities can be calculated on near-term devices. We also elucidate their relationship and how they are influenced by noise processes. Next, we give an overview of the core results of the quantum sensing literature and proceed to a comprehensive review of recent applications in variational quantum algorithms and quantum machine learning.
description: 30 pages, 3 figures, quantumarticle, comments warmly welcome
Charged massive particle at rest in the field of a Reissner-Nordström black hole
Creators: name: Bini, Donato
name: Geralico, Andrea
name: Ruffini, Remo
Publisher: name: arXiv
Year: 2006
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The interaction of a Reissner-Nordström black hole and a charged massive particle is studied in the framework of perturbation theory. The particle backreaction is taken into account, studying the effect of general static perturbations of the hole following the approach of Zerilli. The solutions of the combined Einstein-Maxwell equations for both perturbed gravitational and electromagnetic fields at first order of the perturbation are exactly reconstructed by summing all multipoles, and are given explicit closed form expressions. The existence of a singularity-free solution of the Einstein-Maxwell system requires that the charge to mass ratios of the black hole and of the particle satisfy an equilibrium condition which is in general dependent on the separation between the two bodies. If the black hole is undercritically charged (i.e. its charge to mass ratio is less than one), the particle must be overcritically charged, in the sense that the particle must have a charge to mass ratio greater than one. If the charge to mass ratios of the black hole and of the particle are both equal to one (so that they are both critically charged, or "extreme"), the equilibrium can exist for any separation distance, and the solution we find coincides with the linearization in the present context of the well known Majumdar-Papapetrou solution for two extreme Reissner-Nordström black holes. In addition to these singularity-free solutions, we also analyze the corresponding solution for the problem of a massive particle at rest near a Schwarzschild black hole, exhibiting a strut singularity on the axis between the two bodies. The relations between our perturbative solutions and the corresponding exact two-body solutions belonging to the Weyl class are also discussed.
description: 42 pages, 3 eps figures, revtex macros
The missing angular momentum of superconductors
Creators: name: Hirsch, J. E.
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: We point out that the Meissner effect, the process by which a superconductor expels magnetic field from its interior, represents an unsolved puzzle within the London-BCS theoretical framework used to describe the physics of conventional superconductors, because it appears to give rise to non-conservation of angular momentum. Possible ways to avoid this inconsistency within the conventional theory of superconductivity are argued to be farfetched. Consequently, we argue that unless/until a consistent explanation is put forth, the existence of the Meissner effect represents an anomaly that casts doubt on the validity of the conventional framework. Instead, we point out that two elements of the unconventional theory of hole superconductivity, namely that the charge distribution in superconductors is macroscopically inhomogeneous, and the fact that spin-orbit coupling plays an essential role, allow for a consistent explanation of the Meissner effect.
Σχολιασμένη μετάφραση αποσπάσματος του άρθρου «Regulatory Considerations for the Clinical and Research Use of Transcranial Direct Current Stimulation (tDCS): review and recommendations from an expert panel» των Fregni κ.συν. από την αγγλική στην ελληνική γλώσσα
Creators: name: Μπότζα, Ελένη Αθανασίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2019
Subjects: Σχολιασμένη μετάφραση
Διακρανιακός ερεθισμός
Ανασκόπηση
Annotated translation
tDCS (Transcranial Direct Current Stimulation)
Review

description: Η παρούσα εργασία περιλαμβάνει τη σχολιασμένη μετάφραση τμήματος του άρθρου «Regulatory Considerations for the Clinical and Research Use of Transcranial Direct Current Stimulation (tDCS): review and recommendations from an expert panel» και επιδιώκει να εξετάσει το εύρος της ελληνικής ορολογίας και βιβλιογραφίας ως προς το πεδίο του διακρανιακού ερεθισμού μέσω ηλεκτρικού ρεύματος. Πρόκειται για ένα σύνολο μη-επεμβατικών μεθόδων με τις οποίες επιτυγχάνεται ο ερεθισμός του εγκεφάλου και οι οποίες αξιοποιούνται σε διαρκώς διευρυνόμενη κλίμακα από ποικίλους κλάδους, όπως η νευρολογία και η ψυχιατρική, για κλινικούς και ερευνητικούς σκοπούς. Οι συντάκτες του άρθρου επιχειρούν μια ανασκόπηση του ρυθμιστικού πλαισίου για τη μέθοδο tDCS και εξετάζουν τις ανεπιθύμητες ενέργειες και την αποτελεσματικότητα της μεθόδου, στηριζόμενοι σε δεδομένα που έχουν συλλεγεί από διάφορες χώρες. Η χρήση της εν λόγω μεθόδου στην Ελλάδα παραμένει περιορισμένη, καθιστώντας εξαιρετικά ενδιαφέρουσα την αναζήτηση σχετικών δεδομένων και εμπειριών. Στην παρούσα εργασία διερευνάται ο βαθμός στον οποίο έχουν διατηρηθεί στην αγγλική γλώσσα όροι που αφορούν το συγκεκριμένο πεδίο, αναλύονται τα εμπόδια που απαντήθηκαν κατά τη διαδικασία της μετάφρασης και, τελικώς, διαμορφώνεται ένα γλωσσάρι με τους όρους που απαντούν στο εν λόγω άρθρο και την απόδοση που επιλέχθηκε για την ελληνική γλώσσα
description: This thesis includes the annotated translation of part of the article “Regulatory Considerations for the Clinical and Research Use of Transcranial Direct Current Stimulation (tDCS): review and recommendations from an expert panel” and aims to examine the scope of Greek literature and terminology in the field of transcranial stimulation with the use of electricity. These are non-invasive methods of stimulating the brain used to a growing extent in several sectors, such as neurology and psychiatry, for clinical and research purposes. The authors of the article review the regulatory framework of tDCS, and examine the side effects and the efficacy of the method, based on data collected by several countries. The use of the aforementioned method in Greece is still limited, which makes the search for relevant data and experiences extremely interesting and challenging. In this thesis we examine the extent of the use of English terminology in Greek texts concerning this field, we analyse the difficulties in the translation process and we create a glossary of the terms encountered in the article
Small-scale Turbulent Motion of the Plasma in a Solar Filament as the Precursor of Eruption
Creators: name: Seki, Daikichi
name: Otsuji, Kenichi
name: Isobe, Hiroaki
name: Del Zanna, Giulio
name: Ishii, Takako T.
name: Sakaue, Takahito
name: Ichimoto, Kiyoshi
name: Shibata, Kazunari
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: A filament, a dense cool plasma supported by the magnetic fields in the solar corona, often becomes unstable and erupts. It is empirically known that the filament often demonstrates some activations such as a turbulent motion prior to eruption. In our previous study (Seki et al. 2017), we analysed the Doppler velocity of an Hα filament and found that the standard deviation of the line-of-sight-velocity (LOSV) distribution in a filament, which indicates the increasing amplitude of the small-scale motions, increased prior to the onset of the eruption. Here, we present a further analysis on this filament eruption, which initiated approximately at 03:40UT on 2016 November 5 in the vicinity of NOAA AR 12605. It includes a coronal line observation and the extrapolation of the surrounding magnetic fields. We found that both the spatially averaged micro-turbulence inside the filament and the nearby coronal line emission increased 6 and 10 hours prior to eruption, respectively. In this event, we did not find any significant changes in the global potential-field configuration preceding the eruption for the past 2 days, which indicates that there is a case in which it is difficult to predict the eruption only by tracking the extrapolated global magnetic fields. In terms of space weather prediction, our result on the turbulent motions in a filament could be used as the useful precursor of a filament eruption.
description: accepted for publication in ApJ