cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
A Chandra X-ray detection of the L dwarf binary Kelu-1: Simultaneous Chandra and Very Large Array observations
Creators: name: Audard, M.
name: Osten, R. A.
name: Brown, A.
name: Briggs, K. R.
name: Guedel, M.
name: Hodges-Kluck, E.
name: Gizis, J. E.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Magnetic activity in ultracool dwarfs, as measured in X-rays and H$α$, shows a steep decline after spectral type M7-M8. So far, no L dwarf has been detected in X-rays. In contrast, L dwarfs may have higher radio activity than M dwarfs. We observe L and T dwarfs simultaneously in X-rays and radio to determine their level of magnetic activity in the context of the general decline of magnetic activity with cooler effective temperatures. The field L dwarf binary Kelu-1 was observed simultaneously with Chandra and the Very Large Array. Kelu-1AB was detected in X-rays with $L_{\rm X} = 2.9_{-1.3}^{+1.8} \times 10^{25}$ erg/s, while it remained undetected in the radio down to a $3 σ$ limit of $L_{\rm R} \leq 1.4 \times 10^{13}$ erg/s/Hz. We argue that, whereas the X-ray and H$α$ emissions decline in ultracool dwarfs with decreasing effective temperature, the radio luminosity stays (more or less) constant across M and early-L dwarfs. The radio surface flux or the luminosity may better trace magnetic activity in ultracool dwarfs than the ratio of the luminosity to the bolometric luminosity. Deeper radio observations (and at short frequencies) are required to determine if and when the cut-off in radio activity occurs in L and T dwarfs, and what kind of emission mechanism takes place in ultracool dwarfs.
description: Accepted for publication as a Letter in Astronomy & Astrophysics
ปัจจัยพัฒนาการท่องเที่ยวเชิงนิเวศประวัติศาสตร์ในเขตพื้นที่ประวิติศาสตร์พันท้ายนรสิงห์  จังหวัดสมุทรสาคร
Creators: name: ปทัญทิญา  สิงห์คราม
Publisher: name: มหาวิทยาลัยมหาสารคาม
Year: 2557
Subjects: ปัจจัยพัฒนาการท่องเที่ยวเชิงนิเวศประวัติศาสตร์, พื้นที่ประวัติศาสตร์พันท้ายนรสิงห์

description: 1, 33, วารสารมนุษยศาสตร์และสังคมศาสตร์  มหาวิทยาลัยมหาสารคาม
Η συμβολή της διδασκαλίας της γεωγραφίας και της κοινωνικής και πολιτικής αγωγής στην προσέγγιση της Οικουμενικής Εκπαίδευσης για την Παγκόσμια Ιδιότητα του Πολίτη
Creators: name: Βουδρισλής, Νικόλαος Γ.
Publisher: name: Aristotle University of Thessaloniki
Year: 2016
Subjects: Γεωγραφική εκπαίδευση
Εκπαίδευση για την ιδιότητα του πολίτη
Οικουμενική εκπαίδευση
Παγκόσμια ιδιότητα του πολίτη
Geographical education
Citizenship education
Global education
Global citizenship

description: Σκοπός της διδακτορικής διατριβής ήταν να καταδείξει τη συμβολή της διδασκαλίας της γεωγραφίας και της κοινωνικής και πολιτικής αγωγής στην προσέγγιση της Οικουμενικής Εκπαίδευσης. Για το λόγο αυτό εξετάσαμε τις σύγχρονες τάσεις στη γεωγραφική εκπαίδευση και την εκπαίδευση για την ιδιότητα του πολίτη μέσα από υπάρχουσες έρευνες και την αρθρογραφία των τελευταίων ετών. Διερευνήσαμε τις ρίζες και την ιστορική εξέλιξη της οικουμενικής εκπαίδευσης και της εκπαίδευσης για την παγκόσμια ιδιότητα του πολίτη και καταγράψαμε τις διαφορετικές προσεγγίσεις της έννοιας της παγκόσμιας ιδιότητας του πολίτη. Στη συνέχεια παρουσιάσαμε αναλυτικά το θεωρητικό πλαίσιο, τους σκοπούς, το περιεχόμενο και τις διαστάσεις των δύο αυτών κινημάτων. Ακόμη αναφερθήκαμε στην εννοιολόγηση της ταυτότητας και στους τρόπους με τους οποίους συγκροτείται. Αναλύσαμε την εθνική ταυτότητα σε αντιδιαστολή με την κοσμοπολίτικη ταυτότητα και κάναμε ανασκόπηση της βιβλιογραφίας που αφορά τις γεωγραφικές μελέτες που εξετάζουν τη σχέση της ταυτότητας και του χώρου. Ασχοληθήκαμε επιπλέον με τη συμβολή της γεωγραφικής εκπαίδευσης στην εκπαίδευση για την ιδιότητα του πολίτη, την έννοια του γεωγραφικού γραμματισμού, την ανάγκη για καλλιέργεια της χωρικής σκέψης και του χωρικού γραμματισμού, τη συμβολή της γεωτεχνολογίας στην ικανότητα επίλυσης προβλημάτων. Τέλος αναζητήσαμε τις βασικές ικανότητες που μπορεί να καλλιεργήσει η γεωγραφική και χωρική εκπαίδευση στη διαμόρφωση του παγκόσμιου γεω-πολίτη.
description: The thesis aims to highlight the contribution of geography and citizenship education to Global Education. To achieve this we survey the contemporary trends in geography education and citizenship education in current research and academic publications. We explore the origins and historical evolution of Global Education and Global Citizenship Education, and analyse the diverse approaches to the concept of Global Citizenship. We then discuss the theoretical framework, aims, content and dimensions of these two movements. We examine the conceptualisation of identity and the ways it is constituted. We juxtapose national identity to cosmopolitan identity, and review the bibliography that looks into the geography studies examining the relationship between identity and space. We also examine the contribution of geographical education to citizenship education, the notion of geographic literacy, the need to cultivate spatial thinking and spatial literacy and the contribution of geo-technology to problem-solving. Finally, we seek to make clear the essential skills and capabilities brought by geography and spatial education on the formation of the global geo-citizen.
ผลกระทบของกระบวนการตัดสินใจที่มีต่อความพึงพอใจของผู้บริโภคอาหารฟาสต์ฟู้ดในจังหวัดขอนแก่น
Creators: name: ศาศวัต ผลวิเศษ
Publisher: name: มหาวิทยาลัยมหาสารคาม
Year: 2557
Subjects: กระบวนการตัดสินใจ, ความพึงพอใจ

description: 1, 33, วารสารมนุษยศาสตร์และสังคมศาสตร์  มหาวิทยาลัยมหาสารคาม
Evidence of a dwarf galaxy stream populating the inner Milky Way Halo
Creators: name: Malhan, Khyati
name: Yuan, Zhen
name: Ibata, Rodrigo
name: Arentsen, Anke
name: Bellazzini, Michele
name: Martin, Nicolas F.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Stellar streams produced from dwarf galaxies provide direct evidence of the hierarchical formation of the Milky Way. Here, we present the first comprehensive study of the "LMS-1" stellar stream, that we detect by searching for wide streams in the Gaia EDR3 dataset using the STREAMFINDER algorithm. This stream was recently discovered by Yuan et al. (2020). We detect LMS-1 as a $60°$ long stream to the north of the Galactic bulge, at a distance of $\sim 20$ kpc from the Sun, together with additional components that suggest that the overall stream is completely wrapped around the inner Galaxy. Using spectroscopic measurements from LAMOST, SDSS and APOGEE, we infer that the stream is very metal poor (${\rm \langle [Fe/H]\rangle =-2.1}$) with a significant metallicity dispersion ($σ_{\rm [Fe/H]}=0.4$), and it possesses a large radial velocity dispersion (${\rm σ_v=20 \pm 4\,km\,s^{-1}}$). These estimates together imply that LMS-1 is a dwarf galaxy stream. The orbit of LMS-1 is close to polar, with an inclination of $75°$ to the Galactic plane. Both the orbit and metallicity of LMS-1 are remarkably similar to the globular clusters NGC 5053, NGC 5024 and the stellar stream "Indus". These findings make LMS-1 an important contributor to the stellar population of the inner Milky Way halo.
description: 17 pages, 12 figures. Accepted for publication in The Astrophysical Journal (ApJ)
ผลกระทบของความสามารถในการเรียนรู้การทำงานที่มีต่อประสิทธิภาพการปฏิบัติงานของพนักงานธนาคารเพื่อการเกษตรและสหกรณ์การเกษตรในจังหวัดมหาสารคาม
Creators: name: ศุภรณ์ทิพย์ ศิริสุนทร
Publisher: name: มหาวิทยาลัยมหาสารคาม
Year: 2557
Subjects: ความสามารถในการเรียนรู้การทำงาน, ประสิทธิภาพการปฏิบัติงาน

description: 1, 33, วารสารมนุษยศาสตร์และสังคมศาสตร์  มหาวิทยาลัยมหาสารคาม
Reciprocal transformations and flat metrics on Hurwitz spaces
Creators: name: Abenda, S.
name: Grava, T.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We consider hydrodynamic systems which possess a local Hamiltonian structure of Dubrovin-Novikov type. To such a system there are also associated an infinite number of nonlocal Hamiltonian structures. We give necessary and sufficient conditions so that, after a nonlinear transformation of the independent variables, the reciprocal system still possesses a local Hamiltonian structure of Dubrovin-Novikov type. We show that, under our hypotheses, bi-hamiltonicity is preserved by the reciprocal transformation. Finally we apply such results to reciprocal systems of genus g Whitham-KdV modulation equations.
description: 25 pages
HS1857+5144: A hot and young pre-cataclysmic variable
Creators: name: Aungwerojwit, A.
name: Gaensicke, B. T.
name: Rodriguez-Gil, P.
name: Hagen, H. -J.
name: Giannakis, O.
name: Papadimitriou, C.
name: Prieto, C. Allende
name: Engels, D.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We report the discovery of a new white dwarf/M dwarf binary, HS1857+5144, identified in the Hamburg Quasar Survey (HQS). Time-resolved optical spectroscopy and photometry were carried out to determine the properties of this new cataclysmic variable progenitor pre-CV). The light curves of HS1857+5144 display a sinusoidal variation with a period of Porb=383.52 min and peak-to-peak amplitudes of 0.7 mag and 1.1 mag in the B-band and R-band, respectively. The large amplitude of the brightness variation results from a reflection effect on the heated inner hemisphere of the companion star, suggesting a very high temperature of the white dwarf. Our radial velocity study confirms the photometric period as the orbital period of the system. A model atmosphere fit to the spectrum of the white dwarf obtained at minimum light provides limits to its mass and temperature of Mwd=~0.6-1.0 Msun and Twd=~70000-100000 K, respectively. The detection of HeII 4686 absorption classifies the primary star of HS1857+5144 as a DAO white dwarf. Combining the results from our spectroscopy and photometry, we estimate the mass of the companion star and the binary inclination to be Msec=~0.15-0.30 Msun and i=~45-55 deg, respectively. We classify HS1857+5144 as one of the youngest pre-CV known to date. The cooling age of the white dwarf suggests that the present system has just emerged from a common envelope phase ~10^5 yr ago. HS1857+5144 will start mass transfer within or below the 2-3h period gap.
description: accepted for publication in A&A, 10 pages, 9 figures
From one-way streets to percolation on random mixed graphs
Creators: name: Verbavatz, Vincent
name: Barthelemy, Marc
Publisher: name: arXiv
Year: 2021
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Physical sciences

description: In most studies, street networks are considered as undirected graphs while one-way streets and their effect on shortest paths are usually ignored. Here, we first study the empirical effect of one-way streets in about $140$ cities in the world. Their presence induces a detour that persists over a wide range of distances and characterized by a non-universal exponent. The effect of one-ways on the pattern of shortest paths is then twofold: they mitigate local traffic in certain areas but create bottlenecks elsewhere. This empirical study leads naturally to consider a mixed graph model of 2d regular lattices with both undirected links and a diluted variable fraction $p$ of randomly directed links which mimics the presence of one-ways in a street network. We study the size of the strongly connected component (SCC) versus $p$ and demonstrate the existence of a threshold $p_c$ above which the SCC size is zero. We show numerically that this transition is non-trivial for lattices with degree less than $4$ and provide some analytical argument. We compute numerically the critical exponents for this transition and confirm previous results showing that they define a new universality class different from both the directed and standard percolation. Finally, we show that the transition on real-world graphs can be understood with random perturbations of regular lattices. The impact of one-ways on the graph properties were already the subject of a few mathematical studies, and our results show that this problem has also interesting connections with percolation, a classical model in statistical physics.
description: 11 pages, 3 tables, 11 figures
$^{10}$Li spectrum from $^{11}$Li fragmentation
Creators: name: Blanchon, G.
name: Bonaccorso, A.
name: Brink, D. M.
name: Mau, N. Vinh
Publisher: name: arXiv
Year: 2007
Subjects: subject: Nuclear Theory (nucl-th)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: A recently developed time dependent model for the excitation of a nucleon from a bound state to a continuum resonant state in the system n+core is applied to the study of the population of the low energy continuum of the unbound $^{10}$Li system obtained from $^{11}$Li fragmentation. Comparison of the model results to new data from the GSI laboratory suggests that the reaction mechanism is dominated by final state effects rather than by the sudden process, but for the population of the l=0 virtual state, in which case the two mechanisms give almost identical results. There is also, for the first time, a clear evidence for the population of a d$_{5/2}$ resonance in $^{10}$Li.
description: 15 pages, 4 figures, 3 tables. Accepted for publication in Nucl.Phys.A
ประเทศไทยกับการเป็นหนึ่งเดียวกับประชมคมอาเซียน
Creators: name: อุทัย  ดุลยเกษม
Publisher: name: วิทยาลัยเทคโนโลยีภาคใต้
Year: 2555

description: 1, 5, วารสารเทคโนโลยีภาคใต้
Spin pumping of two-dimensional electron gas with Rashba and Dresselhaus spin-orbit interactions
Creators: name: Yama, M.
name: Tatsuno, M.
name: Kato, T.
name: Matsuo, M.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We theoretically consider spin pumping in a junction between a ferromagnetic insulator (FI) and a two-dimensional electron gas (2DEG) in which the Rashba and Dresselhaus spin-orbit interactions coexist. Using second-order perturbation theory, we derive an increase in linewidth in the case of an interfacial exchange coupling in a ferromagnetic resonance (FMR) experiment. We clarify how the enhancement of Gilbert damping depends on the resonant frequency and spin orientation of the FI. We show that this setup of an FMR experiment can provide information on the spin texture of 2DEG at the Fermi surface.
description: 9 pages, 7 figures
Thermo-magnetic characterization of phase transitions in a Ni-Mn-In metamagnetic shape memory alloy
Creators: name: Romero, F. J.
name: Martín-Olalla, J. M.
name: Blázquez, J. S.
name: Gallardo, M. C.
name: Parra, Daniel Soto
name: Vives, Eduard
name: Planes, Antoni
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The partially overlapped ferroelastic/martensitic and para-ferromagnetic phase transitions of a Ni$_{50.53}$Mn${33.65}$In$_{15.82}$ metamagnetic shape memory alloy have been studied from calorimetric, magnetic and acoustic emission measurement. We have taken advantage of the existence of thermal hysteresis of the first order ferroelastic/martensitic phase transition ($\sim2.5$K) to discriminate the latent heat contribution $Δ$Ht = 7.21(15) kJ/kg and the specific heat contribution $Δ$Hc = 216(1) J/kg to the total excess enthalpy of the phase transition. The specific heat was found to follow a step-like behavior at this phase transition. The intermittent dynamics of the ferroelastic/martensitic transition has been characterized as a series of avalanches detected both from acoustic emission and calorimetric measurements. The energy distribution of these avalanche events was found to follow a power law with a characteristic energy exponent $ε\sim2$ which is in agreement with the expected value for a system undergoing a symmetry change from cubic to monoclinic. Finally, the critical behavior of the para-ferromagnetic austenite phase transition that takes place at $\sim 311$K has been studied from the behavior of the specific heat. A critical exponent $α\sim0.09$ has been obtained, which has been shown to be in agreement with previous values reported for Ni-Mn-Ga alloys but different from the critical divergence reported for pure Ni.
description: 18 pages, 11 figures
Macroscopic Screening of Coulomb Potentials From UV/IR-Mixing
Creators: name: Helling, Robert C.
name: You, Jiangyang
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We compute the static potential in a non-commutative theory including a term due to UV/IR-mixing. As a result, the potential decays exponentially fast with distance rather than like a power law Coulomb type potential due to the exchange of massless particles. This shows that when quantum effects are taken into account the introduction of non-commutativity not only modifies physics at short distances but has dramatic macroscopic consequences as well. As a result, we give a lower bound on the scale of non-commutativity (if present at all) to be compatible with observations.
description: 10 pages, V2 minor wording and references
Nigropunctata Samarak. & K. D. Hyde 2022
Creators: name: Zhou, Xin
name: Habib, Kamran
name: Zeng, Wenyu
name: Ren, Yulin
name: Shen, Xiangchun
name: Kang, Jichuan
name: Li, Qirui
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Fungi
Ascomycota
Sordariomycetes
Xylariales
Xylariaceae
Nigropunctata

description: Nigropunctata Samarak. & K. D. Hyde, Fungal Diversity 112: 68, 2022.
Notes.
The genus Nigropunctata, typified by N. bambusicola Samarak. & K. D. Hyde, has recently been classified into Xylariales. The genus is characterized by immersed, solitary or scattered ascomata appearing as small black dots, unitunicate, cylindrical asci with a J +, discoid apical ring (Samarakoon et al. 2022). The genus is represented by seven species (https://www.indexfungorum.org/Names/Names.asp; Accessed June 21, 2024). In this study, we introduce a new species of Nigropunctata from China.
description: Published as part of Zhou, Xin, Habib, Kamran, Zeng, Wenyu, Ren, Yulin, Shen, Xiangchun, Kang, Jichuan & Li, Qirui, 2024, Addition of three new species of Xylariomycetidae fungi on bamboo from Southern China, pp. 109-129 in MycoKeys 109 on pages 109-129, DOI: 10.3897/mycokeys.109.128020
Barriers to Participation in Development Planning of Municipal Governments in Northeastern Thailand
Creators: name: Kathanyoo Kaewhanam
name: Jariya Chatasuwajananon
name: Phimlikid Kaewhanam
Publisher: name: School of Public Administration, National Instituteof Development Administration (NIDA)
Year: 2014
Subjects: Participation, development planning of municipal governments

description: 2, 12, Thai Journal of Public Administration
Efficient Sparse Coding using Hierarchical Riemannian Pursuit
Creators: name: Xue, Ye
name: Lau, Vincent
name: Cai, Songfu
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (cs.LG)
subject: Information Theory (cs.IT)
subject: Signal Processing (eess.SP)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Sparse coding is a class of unsupervised methods for learning a sparse representation of the input data in the form of a linear combination of a dictionary and a sparse code. This learning framework has led to state-of-the-art results in various image and video processing tasks. However, classical methods learn the dictionary and the sparse code based on alternating optimizations, usually without theoretical guarantees for either optimality or convergence due to non-convexity of the problem. Recent works on sparse coding with a complete dictionary provide strong theoretical guarantees thanks to the development of the non-convex optimization. However, initial non-convex approaches learn the dictionary in the sparse coding problem sequentially in an atom-by-atom manner, which leads to a long execution time. More recent works seek to directly learn the entire dictionary at once, which substantially reduces the execution time. However, the associated recovery performance is degraded with a finite number of data samples. In this paper, we propose an efficient sparse coding scheme with a two-stage optimization. The proposed scheme leverages the global and local Riemannian geometry of the two-stage optimization problem and facilitates fast implementation for superb dictionary recovery performance by a finite number of samples without atom-by-atom calculation. We further prove that, with high probability, the proposed scheme can exactly recover any atom in the target dictionary with a finite number of samples if it is adopted to recover one atom of the dictionary. An application on wireless sensor data compression is also proposed. Experiments on both synthetic and real-world data verify the efficiency and effectiveness of the proposed scheme.
description: This paper has been accepted by IEEE Transactions on Signal Processing
Complex charge density waves at Van Hove singularity on hexagonal lattices: Haldane-model phase diagram and potential realization in kagome metals $\text{AV}_3\text{Sb}_5$
Creators: name: Lin, Yu-Ping
name: Nandkishore, Rahul M.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We investigate how the real and imaginary charge density waves interplay at the Van Hove singularity on the hexagonal lattices. A phenomenological analysis indicates the formation of $3Q$ complex orders at all three nesting momenta. Under a total phase condition, unequal phases at the three momenta break the rotation symmetry generally. The $3Q$ complex orders constitute a rich Haldane-model phase diagram. When effective time-reversal symmetries arise under 1-site translations, the Dirac semimetals are protected. The breakdown of these symmetries gaps the Dirac points and leads to the trivial and Chern insulator phases. These phases are deformations of purely real and imaginary orders, which exhibit trivial site and/or bond density and chiral flux orders, respectively. The exotic single-Dirac-point semimetals also appear along the gapless phase boundary. We further show that the theoretical model offers transparent interpretations of experimental observations in the kagome metals $\text{AV}_3\text{Sb}_5$ with $\text{A}=\text{K},\text{Rb},\text{Cs}$. The topological charge density waves may be identified with the complex orders in the Chern insulator phase. Meanwhile, the lower-temperature symmetry-breaking phenomena may be interpreted as the secondary orders from the complex order ground states. Our work sheds light on the nature of the topological charge density waves in the kagome metals $\text{AV}_3\text{Sb}_5$ and may offer useful indications to the experimentally observed charge orders in the future experiments.
description: 14 pages, 9 figures. v3: Published version
Physical modelling of mass transfer in a Peirce-Smith converter
Creators: name: Adjei, Emmanuel
Publisher: name: University of British Columbia
Year: 2010

description: A 1/4 scale Plexiglas model of a copper converter has been used to measure the fraction of gas absorbed during horizontal gas injection. In this work, sulphur dioxide gas was injected into hydrogen peroxide solution under conditions where mass transfer in the gas phase was rate limited. The SO₂ absorption rate was measured as a function of the gas flow rate, tuyere submergence, number of tuyeres, and percent filling. The fraction of gas absorbed correlated well with the total trajectory length which included the spout height. It increased with tuyere submergence but decreased with the air flow rate and remained almost constant after a certain flow rate. The mass transfer parameter, k[sub SO₂], was computed from the results. It compared favourably with the work of previous investigators but could not be used to explain some of the results, especially, the effect of gas flow rate on the fraction of sulphur dioxide absorbed. Further analysis of the experimental results was based on bubble formation period and rise time. The fraction of gas absorbed increased with total residence time. About 74% of the injected gas was absorbed during the formation period. A mechanism to explain the overall absorption was proposed. An equation relating the absorption efficiency and the residence time was obtained for the physical model. This method was extended to the analysis of industrial data for the comparison of measured and predicted oxygen utilization efficiency.
Asymptotics of the Euler number of bipartite graphs
Creators: name: Ehrenborg, Richard
name: Farjoun, Yossi
Publisher: name: arXiv
Year: 2007
Subjects: subject: Combinatorics (math.CO)
subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics

description: We define the Euler number of a bipartite graph on $n$ vertices to be the number of labelings of the vertices with $1,2,...,n$ such that the vertices alternate in being local maxima and local minima. We reformulate the problem of computing the Euler number of certain subgraphs of the Cartesian product of a graph $G$ with the path $P_m$ in terms of self adjoint operators. The asymptotic expansion of the Euler number is given in terms of the eigenvalues of the associated operator. For two classes of graphs, the comb graphs and the Cartesian product $P_2 \Box P_m$, we numerically solve the eigenvalue problem.
description: 13 pages, 6 figure, submitted to JCTB
Impact of axions on the Cassiopea A neutron star cooling
Creators: name: Leinson, Lev B.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The observed anomalous steady decrease in surface temperature of the supernova remnant Cassiopeia A (Cas A), which was reported about ten years ago, has generated much debate. Several exotic cooling scenarios have been proposed using non-standard assumptions about the physics and evolution of this neutron star (NS). At present, significant corrections have been made to the observational data, which make it possible to numerically simulate the Cas A NS cooling process in the framework of the scenario of minimal neutrino cooling. If there is an additional source of cooling, such as axion emission, the steepness of the Cas A NS surface temperature drop will increase with the growth of the axion-nucleon interaction strength. This makes it possible to limit the minimum value of the axion decay constant $f_a$ using the condition that the NS surface temperature should be within the 99% confidence interval obtained from the observational data. Two types of axion models are considered: the Kim-Shifman-Weinstein-Zakharov -- KSVZ model and the Dean-Fischler-Srednitsky-Zhitnitsky --DFSZ model. The above criterion gives a lower limit on the axion decay constant, $f_a>3\times 10^7$ GeV and $f_a>4.5\times 10^8$ GeV for KSVZ and DFSZ axions, respectively.
description: 14 pages, 4 figures
What, Why, and How of International Open Science Communities of Practice
Creators: name: Ación, Laura
Publisher: name: Zenodo
Year: 2024

description: This presentation for the Big Team Science Conference 2024 presents examples of international Open Science communities of practice and part of their impact. We draw from our experience co-creating and participating in international communities of practice from a Majority World perspective. We present lessons learned and tips on how to build healthy communities of practice to obtain outstanding international big-team Open Science.
The Hahn polynomials in the nonrelativistic and relativistic Coulomb problems
Creators: name: Suslov, Sergei K.
name: Trey, Benjamin
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We derive closed formulas for mean values of all powers of r in nonrelativistic and relativistic Coulomb problems in terms of the Hahn and Chebyshev polynomials of a discrete variable. A short review on special functions and solution of the Coulomb problems in quantum mechanics is given.
description: 53 pages, no figures
On the thermomechanical consistency of the time differential dual-phase-lag models of heat conduction
Creators: name: Chirita, Stan
name: Ciarletta, Michele
name: Tibullo, Vincenzo
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: This paper deals with the time differential dual-phase-lag heat transfer models aiming, at first, to identify the eventually restrictions that make them thermodynamically consistent. At a first glance it can be observed that the capability of a time differential dual-phase-lag model of heat conduction to describe real phenomena depends on the properties of the differential operators involved in the related constitutive equation. In fact, the constitutive equation is viewed as an ordinary differential equation in terms of the heat flux components (or in terms of the temperature gradient) and it results that, for approximation orders greater than or equal to five, the corresponding characteristic equation has at least a complex root having a positive real part. That leads to a heat flux component (or temperature gradient) that grows to infinity when the time tends to infinity and so there occur some instabilities. Instead, when the approximation orders are lower than or equal to four, this is not the case and there is the need to study the compatibility with the Second Law of Thermodynamics. To this aim the related constitutive equation is reformulated within the system of the fading memory theory, and thus the heat flux vector is written in terms of the history of the temperature gradient and on this basis the compatibility of the model with the thermodynamical principles is analyzed.
Zero point energy on extra dimension: Noncommutative Torus
Creators: name: Fabi, S.
name: Harms, B.
name: Karatheodoris, G.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this paper we calculate the zero point energy density experienced by observers on M^4 due to a massless scalar field defined throughout M^4 x T^2_F, where T^2_F are fuzzy extra dimensions. Using the Green's function approach we calculate the energy density for the commutative torus and the fuzzy torus. We calculate then the energy density for the fuzzy torus using the Hamiltonian approach. Agreement is shown between Green's function and Hamiltonian approaches.
description: RevTeX4
Scaling of exciton binding energy with external dielectric function in carbon nanotubes
Creators: name: Walsh, Andrew G.
name: Vamivakas, A. Nickolas
name: Yin, Yan
name: Cronin, Stephen B.
name: Unlu, M. Selim
name: Goldberg, Bennett B.
name: Swan, Anna K.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We develop a scaling relationship between the exciton binding energy and the external dielectric function in carbon nanotubes. We show that the electron-electron and electron-hole interaction energies are strongly affected by screening yet largely counteract each other, resulting in much smaller changes in the optical transition energy. The model indicates that the relevant particle interaction energies are reduced by as much as 50 percent upon screening by water and that the unscreened electron-electron interaction energy is larger than the unscreened electron-hole interaction energy, in agreement with explanations of the "ratio problem." We apply the model to measurements of the changes in the optical transistion energies in single, suspended carbon nanotubes as the external dielectric environment is altered.
description: 4 Pages, 4 Figures, Accepted Physica E
Three-body collisions in Boltzmann-Uehling-Uhlenbeck theory
Creators: name: Larionov, A. B.
name: Buss, O.
name: Gallmeister, K.
name: Mosel, U.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Aiming at a microscopic description of heavy ion collisions in the beam energy region of about 10 A GeV, we extend the Giessen Boltzmann-Uehling-Uhlenbeck (GiBUU) transport model by including a relativistic mean field, in-medium baryon-baryon cross sections and three-body collisions. The model is then compared with experimental data for central Au+Au collisions at 2-10 A GeV and central Pb+Pb collisions at 30 and 40 A GeV on the proton rapidity spectra, the midrapidity yields of $π^+$, $K^\pm$ and $(Λ+Σ^0)$, and the transverse mass spectra of $π^\pm$ and $K^\pm$. The three-body collisions increase the inverse slope parameters of the hadron $m_\perp$-spectra to a good agreement with the data.
description: 26 pages, 9 figures, figures added, discussion extended, results not changed, version accepted in Phys. Rev. C
Non-Abelian Anyons and Topological Quantum Computation
Creators: name: Nayak, Chetan
name: Simon, Steven H.
name: Stern, Ady
name: Freedman, Michael
name: Sarma, Sankar Das
Publisher: name: arXiv
Year: 2007
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Topological quantum computation has recently emerged as one of the most exciting approaches to constructing a fault-tolerant quantum computer. The proposal relies on the existence of topological states of matter whose quasiparticle excitations are neither bosons nor fermions, but are particles known as {\it Non-Abelian anyons}, meaning that they obey {\it non-Abelian braiding statistics}. Quantum information is stored in states with multiple quasiparticles, which have a topological degeneracy. The unitary gate operations which are necessary for quantum computation are carried out by braiding quasiparticles, and then measuring the multi-quasiparticle states. The fault-tolerance of a topological quantum computer arises from the non-local encoding of the states of the quasiparticles, which makes them immune to errors caused by local perturbations. To date, the only such topological states thought to have been found in nature are fractional quantum Hall states, most prominently the ν=5/2 state, although several other prospective candidates have been proposed in systems as disparate as ultra-cold atoms in optical lattices and thin film superconductors. In this review article, we describe current research in this field, focusing on the general theoretical concepts of non-Abelian statistics as it relates to topological quantum computation, on understanding non-Abelian quantum Hall states, on proposed experiments to detect non-Abelian anyons, and on proposed architectures for a topological quantum computer. We address both the mathematical underpinnings of topological quantum computation and the physics of the subject using the ν=5/2 fractional quantum Hall state as the archetype of a non-Abelian topological state enabling fault-tolerant quantum computation.
description: Final Accepted form for RMP
Έλεγχος Προδιαγεγραμμένης Απόκρισης Παρουσία Περιορισμών στο Σήμα Ελέγχου
Creators: name: Θεοδωρακόπουλος, Αχιλλέας-Κωνσταντίνος Β.
Publisher: name: Aristotle University of Thessaloniki
Year: 2016
Subjects: Συστήματα Ελέγχου
Έλεγχος Προδιαγεγραμμένης Απόκρισης
Νεκρή ζώνη
Υστέρηση
Control Systems
Prescribed Performance Control
Deadzone
Hysteresis

description: Η διατριβή πραγματεύεται πρωτότυπες προεκτάσεις της θεωρίας Προδιαγεγραμμένης Απόκρισης Εξόδου (ΠΑΕ) σε δύο άξονες: α) στην αντιμετώπιση κοινών μη γραμμικοτήτων στην είσοδο ελέγχου και β) στην αντιπρόταση νέων λύσεων ελέγχου σημαντικά απλούστερων σε σχέση με ήδη υπάρχουσες. Συγκεκριμένα, για μία γενική κλάση αφφινικών ως προς την είσοδο κάτω τριγωνικών (strict-feedback) συστημάτων Μ.Ε.Μ.Ε. επιλύονται με ελεγκτές συνεχείς, στατικούς και ιδιαίτερα απλής δομής τα παρακάτω προβλήματα: i) έλεγχος παρουσία νεκρής ζώνης ή/και υστέρησης στον ενεργοποιητή και ii) έλεγχος απουσία γνώσης της κατεύθυνσης ελέγχου. Με τη διατύπωση πρωτότυπης συνθήκης ελεγξιμότητας, τα αποτελέσματα γενικεύονται στην αντίστοιχη μη αφφινική και μη παραγωγίσιμη (non-smooth pure-feedback) κλάση συστημάτων, συνενώνοντας πληθώρα διαφοροποιημένων προβλημάτων ελέγχου και επιλύοντάς τα με κοινό -- για πρώτη φορά στη βιβλιογραφία -- αλγόριθμο ελέγχου. Επιπλέον, η διατριβή αντιπροτείνει για μία γενική κλάση συστημάτων Π.Ε.Π.Ε., συνεχείς και στατικές λύσεις ελέγχου σημαντικά απλούστερες σε σχέση με την ήδη υπάρχουσα λύση ΠΑΕ. Τέλος, όπως συνεπάγεται η χρήση της μεθοδολογίας ΠΑΕ, οι προτεινόμενοι ελεγκτές, τόσο για τα συστήματα Μ.Ε.Μ.Ε. όσο και για τα Π.Ε.Π.Ε., επιβάλλουν την ικανοποίηση προκαθορισμένων από το σχεδιαστή κριτηρίων επίδοσης στο σφάλμα παρακολούθησης εξόδου, όπως ελάχιστη εκθετική ταχύτητα σύγκλισης, μέγιστο σφάλμα σταθερής κατάστασης κλπ.
description: This dissertation discusses novel extensions of the Prescribed Performance Control (P.P.C.) theory towards two directions: a) addressing common input nonlinearities and b) providing new control solutions significantly more simple compared to the existing ones. Specifically, via static, continuous and low-complexity control algorithms, the following problems are resolved for a general class of affine-in-the-control strict-feedback S.I.S.O. systems: i) control in the presence of deadzone or/and hysteresis in the actuator, and ii) control with unknown control directions. By stating a novel controllability condition, the results are generalised to the class of non-smooth (non-differentiable) systems, thus unifying a plethora of differential control problems and solving them with a common -- for the first time in the relevant literature -- control algorithm. Moreover, with respect to a general class of M.I.M.O. systems, the dissertation proposes continuous and static control solutions significantly more simple compared to the existing P.P.C. solution. Finally, the control solutions provided in this dissertation, as implied by the utilization of the P.P.C. methodology, impose a priori defined performance criteria such as minimum exponential convergence rate, maximum steady-state error, etc.
ALIENAÇÃO PARENTAL: ASPECTOS JURÍDICOS E PSICOSSOCIAIS
Creators: name: Katyane Tabosa Mendes da Silva¹ José Marcos de Lira Oliveira Filho² Isadora Dar'c Davi de Souza³ Ana Cristina Souza e Silva4 José Vital Alves Cabral5 Antônio Azoubel Antunes6 Emanuel Sávio de Souza Andrade7 Arnaldo de França Caldas Junior8
Publisher: name: Zenodo
Year: 2023

description: RESUMO

A chamada Síndrome de Alienação Parental (SAP) define a alienação parental como um “treinamento” aplicado por um dos genitores para que a criança ou adolescente odeie o outro genitor, rompendo laços afetivos, além de ocasionar sentimentos de ansiedade e temor. A Alienação Parental (AP) é um fenômeno com prevalência significativa na população mundial e tem sido associada à deterioração da saúde mental das pessoas que a vivenciam ou já vivenciaram. Objetivo: Descrever como o Poder Judiciário e o trabalho psicossocial podem ofertar às crianças e adolescentes, vítimas de alienação parental, uma melhor qualidade de vida. Método: Trata-se de uma revisão integrativa com buscas coletadas através de dados bibliográficos, com aspectos que tratam sobre alienação parental no âmbito jurídico e psicossocial. A busca dos artigos foi realizada em 2023. Como base de dados, utilizamos a Biblioteca Virtual de Saúde (BVS), nos quais localizamos artigos da Scielo, Lilacs, Medline (PubMed), e Descritores em Ciências da Saúde (DeCS). Utilizamos sites Federativos como complemento de busca dos artigos não localizados nos sites inclusos. Como descritores, localizamos: Poder Judiciário. Alienação Social. Consentimento do Responsável. Direitos da Criança e do Adolescente. Funcionamento Psicossocial. Como critérios inclusão, foram realizadas buscas de artigos publicados entre os anos de 2017 a 2023, que condiziam com a temática abordada. Como critérios de exclusão, estudos avaliaram violações de direito à criança e ao adolescente, dentro do contexto jurídico e psicossocial, porém estavam fora da alienação parental. Resultados: Através das buscas realizadas nas bases de dados, registramos 380 artigos, dentre esses, 95 foram selecionados para uma leitura completa. Após a leitura completa dos 95 artigos, 18 foram mantidos na revisão; pois apresentaram os critérios previamente definidos sobre a temática de alienação parental dentro dos aspectos jurídicos e psicossociais. Constatamos ainda que, na maioria dos estudos ocorre a prevalência do abuso psicológico. A presença de pais alienadores só piora a situação e a fragilidade dos menores e incapazes de responderem por si só.

 

Palavras-chave: Poder Judiciário. Alienação Social. Consentimento do Responsável. Direitos da Criança e do Adolescente. Funcionamento Psicossocial.
Η συμφωνία ως φόρμα, ως συνθετική διαδικασία και ως μέσο αναζήτησης αντιπροσωπευτικού ύφους - ανάλυση Πρώτης Συμφωνίας για μεγάλη ορχήστρα και φωνή
Creators: name: Οικονόμου, Δημήτριος Κ.
Publisher: name: Aristotle University of Thessaloniki
Year: 2016
Subjects: Σύνθεση
Συμφωνία
Υφή
Μεταμόρφωση
Composition
Symphony
Texture
Modulation

description: Το παρόν κείμενο αποτελεί συνοδευτικό υπόμνημα του κύριου μέρους της διδακτορικής διατριβής στη Σύνθεση και χωρίζεται σε τρία κύρια κεφάλαια. Στο πρώτο κεφάλαιο περιγράφεται αρχικά η αισθητική αφετηρία, η οποία και καθόρισε τις τεχνικές σύνθεσης που αναπτύχθηκαν κατά τη διάρκεια εκπόνησης της διδακτορικής διατριβής. Στη συνέχεια παρουσιάζονται οι τεχνικές που συγκεκριμενοποιήθηκαν κατά τη σύνθεση της Πρώτης Συμφωνίας αλλά και όλων των παράλληλων έργων που γράφτηκαν κατά την ίδια χρονική περίοδο. Στο δεύτερο κεφάλαιο αναλύεται η Πρώτη Συμφωνία συστηματικά ανά μέρος, παρουσιάζοντας την πρακτική εφαρμογή των τεχνικών, και τη γενικότερη μορφολογία του έργου. Στο τρίτο κεφάλαιο τέλος, προσεγγίζεται το έργο μουσικοποιητικά, αναλύοντας τη χρήση της φωνής και παρουσιάζοντας τα συνολικά αισθητικά χαρακτηριστικά του.
description: This text constitutes the accompanying statement of the main part of the doctoral thesis in Composition (First Symphony) and is divided into three main chapters. The first chapter describes the aesthetic starting point, which determined the composition techniques developed during the preparation of the doctoral thesis. Next it presents the techniques that became concrete in the composition of the First Symphony and all parallel works written during the same period. The second chapter deals with the First Symphony systematically for each movement, presenting the practical application of the techniques, and the overall morphology of the work. The third chapter finally, approaches the work poetically, analyzing the use of the voice and presenting it’s overall aesthetic characteristics.
The Geneva-Copenhagen Survey of the Solar neighbourhood II. New uvby calibrations and rediscussion of stellar ages, the G dwarf problem, age-metallicity diagram, and heating mechanisms of the disk
Creators: name: Holmberg, J.
name: Nordstrom, B.
name: Andersen, J.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Ages, metallicities, space velocities, and Galactic orbits of stars in the Solar neighbourhood are fundamental observational constraints on models of galactic disk evolution. We aim to consolidate the calibrations of uvby photometry into Te, [Fe/H], distance, and age for F and G stars and rediscuss the results of the Geneva-Copenhagen Survey (Nordstrom et al. 2004; GCS) in terms of the evolution of the disk. We substantially improve the Te and [Fe/H] calibrations for early F stars, where spectroscopic temperatures have large systematic errors. Our recomputed ages are in excellent agreement with the independent determinations by Takeda et al. (2007), indicating that isochrone ages can now be reliably determined. The revised G-dwarf metallicity distribution remains incompatible with closed-box models, and the age-metallicity relation for the thin disk remains almost flat, with large and real scatter at all ages (sigma intrinsic = 0.20 dex). Dynamical heating of the thin disk continues throughout its life; specific in-plane dynamical effects dominate the evolution of the U and V velocities, while the W velocities remain random at all ages. When assigning thick and thin-disk membership for stars from kinematic criteria, parameters for the oldest stars should be used to characterise the thin disk.
description: Accepted for publication in A&A on June 20, 2007
New Jarlskog determinant from Physics above the GUT Scal
Creators: name: Koranga, Bipin Singh
name: Sankar, S. Uma
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study the Planck scale effects on Jarlskog determinant. Quantum gravitational (Planck scale) effects lead to an effective SU(2)_{L}\times U(1) invariant dimension-5 Lagrangian involving neutrino and Higgs fields, which gives rise to additional terms in neutrino mass matrix on electroweak symmetry breaking. We assume that gravitational interaction is flavor blind and compute the Jarlskog determinant due to the Planck scale effects. In the case of neutrino sector, the strength of CP violation is measured by Jarlskog determinant. In this paper, we assume CP violation arise from Planck scale effects. We applied our approach to study Jarlskog determinant due to the Planck scale effects.
description: 11 pages and 2 figures