cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Twistronics: A turning point in 2D quantum materials
Creators: name: Hennighausen, Zachariah
name: Kar, Swastik
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Other Condensed Matter (cond-mat.other)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Moiré superlattices - periodic orbital overlaps and lattice-reconstruction between sites of high atomic registry in vertically-stacked 2D layered materials - are quantum-active interfaces where non-trivial quantum phases on novel phenomena can emerge from geometric arrangements of 2D materials, which are not intrinsic to the parent materials. Unexpected distortions in band-structure and topology lead to long-range correlations, charge-ordering, and several other fascinating quantum phenomena hidden within the physical space between the (similar or dissimilar) parent materials. Stacking, twisting, gate-modulating, and optically-exciting these superlattices open up a new field for seamlessly exploring physics from the weak to strong correlations limit within a many-body and topological framework. It is impossible to capture it all, and the aim of this review is to highlight some of the important recent developments in synthesis, experiments, and potential applications of these materials.
Moufang transformations and Noether currents
Creators: name: Paal, Eugen
Publisher: name: arXiv
Year: 2006
Subjects: subject: Mathematical Physics (math-ph)
subject: Representation Theory (math.RT)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 17D10; 20N05; 81R05

description: The Noether currents generated by continuous Moufang tranformations are constructed and their equal-time commutators are found. The corresponding charge algebra turns out to be a birepresentation of the tangent Mal'ltsev algebra of an analytic Moufang loop.
description: 6pp, LaTeX2e
Riflessioni critiche su una presunta influenza di Croce sulla concezione dell’arte di Corrado Ricci
Creators: name: Cantelli, Chiara
Publisher: name: Materiali di Estetica. Terza serie
Year: 2019

description: Critics generally converge on the supposition that the close relationship between the historian and art critic Corrado Ricci and Croce had a relevant influence on the first, as shown by an essay of 1905, closely similar in content and terminology to the Neapolitan philosopher's Aesthetics. Actually, the use of such terminology by Ricci precedes the Crocian text, outlining an autonomous conception of art which, albeit converging in many respects to that of Croce, diverges on as many key-points.
description: Materiali di Estetica. Terza serie, N. 6.1 (2019): Gillo Dorfles. L'estetica al plurale
Note per un’estetica comparata
Creators: name: Alberti, Germana
Publisher: name: Materiali di Estetica. Terza serie
Year: 2019

description: The article is a report of the comparative aesthetics seminar held in 2018 at the Rimini’s School of Oriental and Comparative Philosophy. Various and interesting topics related to intercultural aesthetics were discussed: the philosophical ideas underlying Chanoyu; the link between culture, perception, representation and language; the history of the reception of non-European works in Western culture; characteristic aspects of Buddhist, Chinese and Japanese art.
description: Materiali di Estetica. Terza serie, N. 6.1 (2019): Gillo Dorfles. L'estetica al plurale
Neoperla quadrispina Li & Mo & Wang 2020, sp. nov.
Creators: name: Li, Weihai
name: Mo, Raorao
name: Wang, Guoquan
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Plecoptera
Perlidae
Neoperla
Neoperla quadrispina

description: Neoperla quadrispina sp. nov.
(Figs. 6–7)
 Adult habitus ( Figs. 6–7). The head pale except for yellow and dark markings: a large yellowish brown median rhombolic area interrupted by pale M-line, and the small area between two ocelli surrounded by subsquare dark brown spots, and the distance between the ocelli subequal to the diameter of a single ocellus; the antennae brown but basal segments light yellow; pronotum pale yellow with median half brown with rugosities. Legs brownish; wings light brown, veins brown; cerci pale brown.
 Male ( Figs. 6–7). Forewing length 8.4–8.9 mm. Hindwing length 7.0– 7.5 mm. Posterior process of tergum 7 nearly quadrate covered with dense dorsal and distal sensilla basiconica. Tergum 8 with an upward curved, tongueshaped process, with sensilla basiconica at apex. Tergum 10 with finger-like hemitergal process, medial portion distinctly curved forward, tip bluntly sharp. Aedeagal tube straight, apically with Y-shaped ventral lobe, with two black spines at the ends of each fork; the lobe generally straight and finger-like in lateral aspect.Aedeagal sac ca. 2X as long as the tube, distal two third abruptly curved ventrally, covered with many dark tiny spines at the triangular apex.
 Female. Unknown.
 Material examined. Holotype male (HIST), China: Guangxi, Guigang City, Tianping Mountain National Forest Park, 210m, 2017.VIII.3, G.Q. Wang. Paratype: 1 male (HIST) same locality and date as holotype.
 Etymology. The specific name “quadrispina” refers to the four apical spines of the Y-shaped lobe of the aedeagal tube.
 Distribution. China (Guangxi Zhuang Autonomous Region).
 Remarks. The Y-shaped lobe of the aedeagal tube also demonstrate its placement in the diehli subgroup, including several species mentioned above and Neoperla delphina sp. nov.. However, the two spines at the ends of each fork of the Y-shaped lobe of Neoperla quadrispina sp. nov. could distinguish it from other species in this subgroup.
description: Published as part of Li, Weihai, Mo, Raorao & Wang, Guoquan, 2020, Two new species of Neoperla montivaga group (Plecoptera: Perlidae) from Guangxi Zhuang Autonomous Region of southern China, pp. 573-583 in Zootaxa 4718 (4) on pages 577-581, DOI: 10.11646/zootaxa.4718.4.10, http://zenodo.org/record/3602596
The study of sq_L sq_L production at LHC in the l^\pm l^\pm channel and sensitivity to other models
Creators: name: Nojiri, Mihoko M.
name: Takeuchi, Michihisa
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: $\tilde{q}_L \tilde{q}_L$ production is one of the main SUSY production processes in the MSSM, which occurs due to the chirality flip caused by the Majorana gluino mass. This process is one of the sources of same sign two lepton (SS2$l$) events, however, gluino production also contributes to this channel. In this paper, we develop a method to identify gluino and squark production separately in the SS2$l$ channel, based on cuts on the kinematical configuration of the jets. We applied the method to the MSSM, a model with an extended gluino sector, and the Littlest Higgs model with T-parity (LHT), and found a distinctive difference between these models when considering the numbers of SS2$l$ events selected by the cuts.
description: 40 pages, 24 figures, added references, typos added
Spin-valve effect and magnetoresistivity in single crystalline Ca3Ru2O7
Creators: name: Bao, Wei
name: Mao, Z. Q.
name: Qu, Z.
name: Lynn, J. W.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The laminar perovskite Ca3Ru2O7 naturally forms ferromagnetic double-layers of alternating moment directions, as in the spin-valve superlattices. The mechanism of huge magnetoresistive effect in the material has been controversial due to a lack of clear understanding of various magnetic phases and phase-transitions. In this neutron diffraction study in a magnetic field, we identify four different magnetic phases in Ca3Ru2O7 and determine all first-order and second-order phase transitions between them. The spin-valve mechanism then readily explains the dominant magnetoresistive effect in Ca3Ru2O7.
description: 4 pages, 5 figures
Increasing persistence in Indonesian post-secondary distance education
Creators: name: Belawati, Tian
Publisher: name: University of British Columbia
Year: 2009

description: This study concerns student persistence in post-secondary distance education within the Indonesian context. The primary intent was to test the effectiveness of several interventions designed to increase student persistence at the Indonesian Open University (Universitas Terbuka--UT). Based on the cultural, educational, institutional, and students' backgrounds, the study proposed several possible institutional interventions to increase UT's student persistence. The proposed interventions include: (1) provision of a transition stage for students to gradually learn, adapt to and adopt the unfamiliar independent learning system, and (2) enhancement of the academic system's openness to address students' conflicts in time and resources. The effectiveness of some transition stage interventions was tested through a field experiment involving 1102 newly enrolled students in September 1993. The tested interventions were five increasingly detailed sets of written contacts containing information, reminders, encouragements, a brochure about independent learning strategies, and a list of peers' names and addresses. Persistence was measured by the rates of self-test submission, the rates of examination attendance, and re-registration rates in the second semester immediately following the first semester. The results show that the interventions did not significantly increase student persistence. Variables such as number of courses and employment status seem to influence persistence slightly more than the interventions. The results further show that students who submitted higher percentages of self-tests, wrote higher rates of examinations, and were somewhat more likely to re-register in their immediate second semester. Placing these results with in the context from which the interventions were derived, it seems that the interventions may have only been tinkering at the margin of an already problematic distance education system in Indonesia. Lack of persistence at UT may be related to aspects of the distance education model that were not adequately "adopted" such as feedback and counselling. The interventions may not have sufficiently accommodated students' accustomed need for direct guidance. Based on the findings, eight recommendations with regard to UT's registration/administration, tuition, instruction, evaluation/examination, and communication policies and systems were proposed. The recommendations address students' needs for institutional support systems and their conflicts for time and resources.
Does emergent scenario in Hořava-Lifshitz Gravity demand a ghost field?
Creators: name: Bose, Akash
name: Chakraborty, Subenoy
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The non-singular model of the Universe i.e. emergent scenario is now very well known in cosmology. In Einstein gravity such type of singularity free solution is possible in the context of non-equilibrium thermodynamical prescription (both in first and 2nd order theory) with particle creation mechanism. Also there are various models of emergent scenario in different gravity theories. The present work is a twofold attempt namely (i) it has been examined whether it is possible to have singularity free solution in Hořava-Lifshitz modified gravity theory, (ii) if such singularity free solution exists then whether such solution is thermodynamically viable. It is found that perfect fluid matter distribution with phantom nature can generate such type of solution for closed and flat model. Finally thermodynamical analysis has been studied both at the apparent horizon and at any arbitrary horizon.
description: 3 figures
Kinetics of phase-separation in the critical spherical model and local scale-invariance
Creators: name: Baumann, Florian
name: Henkel, Malte
Publisher: name: arXiv
Year: 2006
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Soft Condensed Matter (cond-mat.soft)
subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: The scaling forms of the space- and time-dependent two-time correlation and response functions are calculated for the kinetic spherical model with a conserved order-parameter and quenched to its critical point from a completely disordered initial state. The stochastic Langevin equation can be split into a noise part and into a deterministic part which has local scale-transformations with a dynamical exponent z=4 as a dynamical symmetry. An exact reduction formula allows to express any physical average in terms of averages calculable from the deterministic part alone. The exact spherical model results are shown to agree with these predictions of local scale-invariance. The results also include kinetic growth with mass conservation as described by the Mullins-Herring equation.
description: Latex2e with IOP macros, 28 pp, 2 figures, final form
Transient Theoretical Analysis of Diffusion RLS Algorithm for Cyclostationary Colored Inputs
Creators: name: Gao, Wei
name: Chen, Jie
name: Richard, Cédric
Publisher: name: arXiv
Year: 2021
Subjects: subject: Signal Processing (eess.SP)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Convergence of the diffusion RLS (DRLS) algorithm to steady-state has been extensively studied in the literature, whereas no analysis of its transient convergence behavior has been reported yet. In this letter, we conduct a theoretical analysis of the transient behavior of the DRLS algorithm for cyclostationary colored inputs, in the mean and mean-square error sense. The resulting analytical models allows us to thoroughly investigate the convergence behavior of the algorithm over adaptive networks in such complex scenarios. Simulation results support the accuracy and correctness of the theoretical findings.
description: 5 pages, 2 figures
Block orthogonal polynomials: II. Hermite and Laguerre standard block orthogonal polynomials
Creators: name: Normand, Jean-Marie
Publisher: name: arXiv
Year: 2006
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences
subject: 11C08; 15A03; 15A63; 33C45; 33D45;42C05

description: The standard block orthogonal (SBO) polynomials $P_{i;n}(x), 0\le i\le n$ are real polynomials of degree $n$ which are orthogonal with respect to a first Euclidean scalar product to polynomials of degree less than $i$. In addition, they are mutually orthogonal with respect to a second Euclidean scalar product. Applying the general results obtained in a previous paper, we determine and investigate these polynomials when the first scalar product corresponds to Hermite (resp. Laguerre) polynomials. These new sets of polynomials, we call Hermite (resp. Laguerre) SBO polynomials, provide a basis of functional spaces well-suited for some applications requiring to take into account special linear constraints which can be recast into an Euclidean orthogonality relation.
description: This is a reduced version of the initial manuscript, the number of pages being reduced from 45 to 32
The effect of replication impediments on differentiation
Creators: name: Eldridge, Cara Bernadette
Publisher: name: Apollo - University of Cambridge Repository
Year: 2019
Subjects: differentiation
G-quadruplex
DNA damage response
induced pluripotent stem cell
stem cell
endoderm

description: In this thesis I set out to answer the question ‘is differentiation robust to replication impediments?’. Prior work in the group has focussed on the epigenetic impact of replication impediments in the terminally differentiated DT40 chicken cell line. I wanted to find out whether these impediments could impact the fundamental biological process of embryonic development. In this work the BOBSC human induced pluripotent stem cell line was differentiated to definitive endoderm while replication was perturbed using DNA damaging agents, low dose hydroxyurea and G-quadruplex secondary structure stabilisation. DNA damage was induced both in the undifferentiated state and during differentiation. When damage was induced during differentiation, greater levels of cell death were seen and there was a larger increase in cells in G2/M phase of the cell cycle compared with treatment in the undifferentiated state. The efficiency of differentiation was observed to negatively correlate with the dose of DNA damaging agent. During unperturbed differentiation, the levels of DNA damage response proteins, including p53, were found to decrease. However, when DNA damage was induced during differentiation the level of p53 increased. In order to understand whether the upregulation of p53 was preventing differentiation, TP53-/- cells were differentiated in the presence of DNA damaging agents. These cells were found to differentiate as efficiently as wildtype untreated cells. This indicates that p53 prevents differentiation in the presence of DNA damage, termed here a ‘differentiation checkpoint’. The level of γH2A.X was found to be markedly increased 50 hours into unperturbed differentiation. This correlates with the point at which the cells transition from being epithelial to mesenchymal. The role of this rise is not known but may correspond to massive transcriptional changes that occur during this transition. G-quadruplex-binding ligands were also shown to alter the course of differentiation, either by a p53-dependent mechanism or by a separate, possibly G-quadruplex specific, mechanism. This also occurred in REV1-/- cells, a specialised polymerase known to play a role in G-quadruplex-processing. This work has led to the conclusion that replication impediments are able to alter the course of definitive endoderm differentiation in human induced pluripotent stem cells.
description: This thesis was funded entirely by the MRC.
title: Μελέτη φυσικοχημικών – μηχανικών ιδιοτήτων σχιστολιθικών πλακών από το ανενεργό λατομείο σχιστόλιθων στο Αργαστήρι του ν. Χανίων
Creators: name: Τζανουδακης Γεωργιος
Publisher: name: Technical University of Crete
Year: 2024

description: Η παρούσα διπλωματική εργασία αφορά την μελέτη φυσικοχημικών και μηχανικών ιδιοτήτων σχιστολιθικών πλακών από το ανενεργό λατομείο του οικισμού Αργαστήρι στο ανατολικό Σέλινο του νομού Χανίων. Στο θεωρητικό τμήμα της εργασίας, γίνεται αναφορά στην χρήση των σχιστολιθικών πλακών σε κτίρια κατά το παρελθόν, στις σημερινές χρήσεις αυτών, στις διάφορες δοκιμές αξιολόγησης της ποιότητάς τους βάση διεθνών προτύπων και στις παραμέτρους που επηρεάζουν τις φυσικοχημικές ιδιότητές του με έμφαση στο χρώμα τους. Αναλύονται οι διάφορες παθογένειες που εμφανίζουν οι σχιστολιθικές πλάκες κατά την χρήση τους και κυρίως στην χρήση τους σε στέγες με ιδιαίτερη αναφορά στην θερμική τους συμπεριφορά. Στο τελευταίο κομμάτι του θεωρητικού μέρους παρουσιάζονται οι περιοχές εμφάνισης σχιστόλιθων στην Ελλάδα καθώς επίσης στοιχεία από την εγχώρια βιομηχανία παραγωγής σχιστόλιθου τα τελευταία κυρίως χρόνια. Το πειραματικό μέρος που ακολουθεί, αφορά τον προσδιορισμό των φυσικοχημικών αρχικά παραμέτρων με έμφαση της χημικής σύστασης δειγμάτων σχιστολιθικών πλακών από το Αργαστήρι Χανίων, μέσω των μεθόδων XRD και XRF, καθώς και των μηχανικών ιδιοτήτων τους. Δοκίμια που προέκυψαν από δείγματα του παλαιού λατομείου εξετάζονται στις δοκιμές έμμεσου εφελκυσμού (brazil test), μονοαξονικής θλίψης και κάμψης, με σκοπό τον υπολογισμό της αντοχής τους σε κάθε μια δοκιμή. Τέλος, μελετάται η συμπεριφορά που παρουσιάζουν δύο δείγματα με σχεδόν κυβική μορφή και οι επιπτώσεις στην δομή τους στην περίπτωση πτώσης συγκεντρωμένου βάρους στην επιφάνειά τους με την χρήση υποστρώματος και μη από κάτω ,μέσω ειδικής εργαστηριακής διάταξης. Το συγκεκριμένο σχιστολιθικό πέτρωμα, έπειτα από την εξέταση της συμπεριφοράς του στις δοκιμές έμμεσου εφελκυσμού, μονοαξονικής θλίψης, κάμψης και πτώσης βάρους, αποδείχθηκε ιδιαίτερα αξιόλογο όσον αφορά τα χαρακτηριστικά της αντοχής του.
Machine learning at the atomic-scale
Creators: name: Musil, Félix
name: Ceriotti, Michele
Publisher: name: arXiv
Year: 2020
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: Statistical learning algorithms are finding more and more applications in science and technology. Atomic-scale modeling is no exception, with machine learning becoming commonplace as a tool to predict energy, forces and properties of molecules and condensed-phase systems. This short review summarizes recent progress in the field, focusing in particular on the problem of representing an atomic configuration in a mathematically robust and computationally efficient way. We also discuss some of the regression algorithms that have been used to construct surrogate models of atomic-scale properties. We then show examples of how the optimization of the machine-learning models can both incorporate and reveal insights onto the physical phenomena that underlie structure-property relations.
Area distribution and scaling function for punctured polygons
Creators: name: Richard, Christoph
name: Jensen, Iwan
name: Guttmann, Anthony J.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Combinatorics (math.CO)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Probability (math.PR)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 05A15; 05A16

description: Punctured polygons are polygons with internal holes which are also polygons. The external and internal polygons are of the same type, and they are mutually as well as self-avoiding. Based on an assumption about the limiting area distribution for unpunctured polygons, we rigorously analyse the effect of a finite number of punctures on the limiting area distribution in a uniform ensemble, where punctured polygons with equal perimeter have the same probability of occurrence. Our analysis leads to conjectures about the scaling behaviour of the models. We also analyse exact enumeration data. For staircase polygons with punctures of fixed size, this yields explicit expressions for the generating functions of the first few area moments. For staircase polygons with punctures of arbitrary size, a careful numerical analysis yields very accurate estimates for the area moments. Interestingly, we find that the leading correction term for each area moment is proportional to the corresponding area moment with one less puncture. We finally analyse corresponding quantities for punctured self-avoiding polygons and find agreement with the conjectured formulas to at least 3-4 significant digits.
description: 50 pages, 12 figures, 5 tables; v2: section 2 slightly rewritten, minor corrections
THE SMALL MOLECULE BCL-2 INHIBITOR HA14-1 POTENTIATES THE LETHALITY OF A REGIMEN COMBINING MEK1/2 AND CHK1 INHIBITORS IN MULTIPLE MYELOMA CELLS
Creators: name: Youssefian, Leena
Publisher: name: VCU Libraries
Year: 2009

description: VCU Theses and Dissertations
Thermodynamic approach for community discovering within the complex networks: LiveJournal study
Creators: name: Zakharov, Pavel
Publisher: name: arXiv
Year: 2006
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: FOS: Physical sciences

description: The thermodynamic approach of concentration mapping is used to discover communities in the directional friendship network of LiveJournal users. We show that this Internet-based social network has a power-law region in degree distribution with exponent γ= 3.45. It is also a small-world network with high clustering of nodes. To study the community structure we simulate diffusion of a virtual substance immersed in such a network as in a multi-dimensional porous system. By analyzing concentration profiles at intermediate stage of the diffusion process the well-interconnected cliques of users can be identified as nodes with equal values of concentration.
description: 7 pages, 7 figures, complete statistics, RE-submitted to PRE
An 8.8 minute orbital period eclipsing detached double white dwarf binary
Creators: name: Burdge, Kevin B.
name: Coughlin, Michael W.
name: Fuller, Jim
name: Kaplan, David L.
name: Kulkarni, S. R.
name: Marsh, Thomas R.
name: Prince, Thomas A.
name: Bellm, Eric C.
name: Dekany, Richard G.
name: Duev, Dmitry A.
name: Graham, Matthew J.
name: Mahabal, Ashish A.
name: Masci, Frank J.
name: Laher, Russ R.
name: Riddle, Reed
name: Soumagnac, Maayane T.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We report the discovery of ZTF J2243+5242, an eclipsing double white dwarf binary with an orbital period of just $8.8$ minutes, the second known eclipsing binary with an orbital period less than ten minutes. The system likely consists of two low-mass white dwarfs, and will merge in approximately 400,000 years to form either an isolated hot subdwarf or an R Coronae Borealis star. Like its $6.91\, \rm min$ counterpart, ZTF J1539+5027, ZTF J2243+5242 will be among the strongest gravitational wave sources detectable by the space-based gravitational-wave detector The Laser Space Interferometer Antenna (LISA) because its gravitational-wave frequency falls near the peak of LISA's sensitivity. Based on its estimated distance of $d=2120^{+131}_{-115}\,\rm pc$, LISA should detect the source within its first few months of operation, and should achieve a signal-to-noise ratio of $87\pm5$ after four years. We find component masses of $M_A= 0.349^{+0.093}_{-0.074}\,M_\odot$ and $M_B=0.384^{+0.114}_{-0.074}\,M_\odot$, radii of $R_A=0.0308^{+0.0026}_{-0.0025}\,R_\odot$ and $R_B = 0.0291^{+0.0032}_{-0.0024}\,R_\odot$, and effective temperatures of $T_A=22200^{+1800}_{-1600}\,\rm K$ and $T_B=16200^{+1200}_{-1000}\,\rm K$. We determined all of these properties, and the distance to this system, using only photometric measurements, demonstrating a feasible way to estimate parameters for the large population of optically faint ($r>21 \, m_{\rm AB}$) gravitational-wave sources which the Vera Rubin Observatory (VRO) and LISA should identify.
description: 12 pages, 7 figures, 3 tables, submitted
Rotating vector model for magnetars
Creators: name: Tong, H.
name: Wang, P. F.
name: Wang, H. G.
name: Yan, Z.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The modification of the rotating vector model in the case of magnetars are calculated. Magnetars may have twisted magnetic field compared with normal pulsars. The polarization position angle of magnetars will change in the case of a twisted magnetic field. For a twisted dipole field, we found that the position angle will change both vertically and horizontally. During the untwisting process of the magnetar magnetosphere, the modifications of the position angle will evolve with time monotonously. This may explain the evolution of the position angle in magnetar PSR J1622-4950 and XTE J1810-197. The relation between the emission point and the line of sight will also change. We suggest every magnetospheric models of magnetars also calculate the corresponding changes of position angle in their models. Order of magnitude estimation formula for doing this is given. This opens the possibility to extract the magnetic field geometry of magnetars from their radio polarization observations.
description: 8 pages. Accepted in MNRAS
Hadron-quark continuity induced by the axial anomaly in dense QCD
Creators: name: Yamamoto, N.
name: Hatsuda, T.
name: Tachibana, M.
name: Baym, G.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We investigate the interplay between the chiral and diquark condensates on the basis of the Ginzburg-Landau potential with QCD symmetry. We demonstrate that the axial anomaly drives a new critical point at low temperature in the QCD phase diagram and leads to a smooth crossover between the hadronic and color superconducting phases.
description: 4 pages, 5 figures, to appear in the Proceedings of Quark Matter 2006 held in Shanghai
HOGENOM new developments
Creators: name: Penel, Simon
Publisher: name: F1000Research
Year: 2015

description: Comparison of homologous biological sequences is an essential step in molecular biology and evolution studies as molecular evolution, phylogeny of species, function prediction, identification of region of interest in genomes, etc.

HOGENOM contains homologous gene families from all fully sequenced organisms. It includes genomes from bacteria, archaea and eukaryota. Alignment and phylogenetic tree are calculated for each gene family

Due to the increasing number of sequencing projects, new developments are needed  to build the last release of HOGENOM .
Upper bounds on signals due to WIMP self--annihilation: comments on the case of the synchrotron radiation from the galactic center and the WMAP haze
Creators: name: Bottino, A.
name: Donato, F.
name: Fornengo, N.
name: Scopel, S.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Two recent papers reconsider the possibility that the excess of microwave emission from a region within $\sim 20^0$ of the galactic center (the {\it WMAP haze}), measured by WMAP, can be due to the synchrotron emission originated by neutralino self-annihilation; on the basis of this possible occurrence, also upper bounds on the neutralino self-annihilation cross--section are suggested. In the present note, we show that in the common case of thermal WIMPs in a standard cosmological model, when the rescaling of the galactic WIMP density is duly taken into account for subdominant WIMPs, the upper bound applicable generically to {\it any} signal due to self-conjugate WIMPs is more stringent than the ones obtained from analysis of the WMAP haze. We also argue that an experimental upper bound, which can compete with our generic upper limit, can rather be derived from measurements of cosmic antiproton fluxes, for some values of the parameters of the astrophysical propagation model. Finally, we comment on the possible impact of our generic upper bound on the interpretation of the WMAP haze in terms of thermal neutralinos in a standard cosmological scheme.
description: 3 pages, comments and 1 figure added
Object substitution masking, stimulus noise and perceptual fidelity
Creators: name: Pilling, Michael
name: Guest, Duncan
name: Andrews, Mark
Publisher: name: F1000Research
Year: 2015

description: The poster looks at how Object substitution masking (OSM, or four-dot masking as it is sometimes known) affects the perceptibility of the target. This is done using an adjustment task (rather than a conventional forced choice decision task) in which observers have to set the gap position of a test stimulus to match that of the target. The effect on target perceptibility is compared between OSM and simultaneous noise mask. It is found that both types of mask lead to an increase in errors. However OSM only increases the number of random errors made;  the simultaneous noise mask increases both the amount of random and non-random errors. This suggests that OSM tends to obliterate the target on trials in which masking is produced. Thus the results can be seen as being consistent with a substitution account of the phenomenon.
Inozemtsev System as Seiberg-Witten Integrable system
Creators: name: Argyres, Philip
name: Chalykh, Oleg
name: Lü, Yongchao
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences

description: In this work we establish that the Inozemtsev system is the Seiberg-Witten integrable system encoding the Coulomb branch physics of 4d $\mathcal{N}=2$ USp(2N) gauge theory with four fundamental and (for $N \geq 2$) one antisymmetric tensor hypermultiplets. We describe the transformation from the spectral curves and canonical one-form of the Inozemtsev system in the $N=1$ and $N=2$ cases to the Seiberg-Witten curves and differentials explicitly, along with the explicit matching of the modulus of the elliptic curve of spectral parameters to the gauge coupling of the field theory, and of the couplings of the Inozemtsev system to the field theory mass parameters. This result is a particular instance of a more general correspondence between crystallographic elliptic Calogero-Moser systems with Seiberg-Witten integrable systems, which will be explored in future work.
description: 33 pages; comments are welcome
The influence of the secular perturbation of an intermediate-mass companion: I. Eccentricity excitation of disk stars at the Galactic center
Creators: name: Zheng, Xiaochen
name: Lin, Douglas N. C.
name: Mao, Shude
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: There is a dense group of OB and Wolf-Rayet stars within a fraction of a parsec from the super-massive black hole (SMBH) at the Galactic Center. These stars appear to be coeval and relatively massive. A subgroup of these stars orbits on the same plane. If they emerged with low to modest eccentricity orbits from a common gaseous disk around the central super-massive black hole, their inferred lifespan would not be sufficiently long to account for the excitation of their high orbital eccentricity through dynamical relaxation. Here we analyze the secular perturbation on Galactic Center stars by an intermediate-mass companion (IMC) as a potential mechanism to account for these young disk stars' high eccentricity. This IMC may be either an intermediate-mass black hole (IMBH) or a compact cluster such as IRS-13E. If its orbital angular momentum vector is anti-parallel to that of the disk stars, this perturbation would be effective in exciting the eccentricity of stars with orbital precession rates which resonate with IMC's precession rate. If it orbits around the SMBH in the same direction as the disk stars, the eccentricity of the young stars can still be highly excited by the IMC during the depletion of their natal disk, possible associated with the launch of the Fermi bubble. In this scenario, IMC's precession rate decreases and its secular resonance sweeps through the proximity of the young stars. We carry out numerical simulations with various inclination angles between the orbits of IMC and the disk stars and show this secular interaction is a robust mechanism to excite the eccentricity and inclination of some disk stars.
description: 21 pages, 7 figures, accepted by ApJ
Attentional control of positive and negative visual emotional distraction
Creators: name: Devue, Christel
name: Kranz, Laura
name: Carmel, David
name: Moody, Rosie
name: Grimshaw, Gina
Publisher: name: F1000Research
Year: 2015

description: Emotional information attracts attention. This claim relies on inconsistent findings from studies that mostly use negative stimuli, tasks which target different stages of attentional selection (engagement, disengagement) and evoke different control strategies (information relevant vs. irrelevant). Here, we studied disruption of goal-relevant processing (i.e. capture) by negative and positive stimuli and mechanisms used to control this distraction. In Experiment 1, irrelevant negative, positive and neutral IAPS images, intact or scrambled, appeared peripherally on 50% of trials while participants identified central letters. Emotional images were more distracting than neutral ones but only when intact, supporting the role of content rather than low-level features. In Experiment 2, we manipulated the probability of distractor presentation (25% or 75%) to determine whether people can strategically control emotional distraction. A low distractor probability produced substantial emotional distraction. However, a high probability almost abolished neutral and emotional distraction, consistent with the use of a proactive control mechanism when frequent distractors are expected. Importantly, attenuation of distraction could not be attributed to the repetition of images. Proactive control seems equally effective at inhibiting emotional and neutral distractors, despite the biological relevance of the former. The different control strategies triggered by distractor probability may partly explain previous inconsistencies.
Coulomb blockade effects in driven electron transport
Creators: name: Kaiser, Franz J.
name: Hänggi, Peter
name: Kohler, Sigmund
Publisher: name: arXiv
Year: 2006
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We study numerically the influence of strong Coulomb repulsion on the current through molecular wires that are driven by external electromagnetic fields. The molecule is described by a tight-binding model whose first and last site is coupled to a respective lead. The leads are eliminated within a perturbation theory yielding a master equation for the wire. The decomposition into a Floquet basis enables an efficient treatment of the driving field. For the electronic excitations in bridged molecular wires, we find that strong Coulomb repulsion significantly sharpens resonance peaks which broaden again with increasing temperature. By contrast, Coulomb blockade has only a small influence on effects like non-adiabatic electron pumping and coherent current suppression.
description: 9 pages, 7 figures. Added a plot for temperature dependence of resonance peaks. Published version
Synchronization in weighed scale-free networks with degree-degree correlation
Creators: name: Sorrentino, F.
name: di Bernardo, M.
name: Cuellar, G. Huerta
name: Boccaletti, S.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: We study synchronization phenomena in scale-free networks of asymetrically coupled dynamical systems featuring degree-degree correlation in the connection wiring. We show that when the interaction is dominant from the high-degree to the low-degree or from the low-degree to the high-degree nodes, synchronization is enhanced for assortative or disassortative degree-degree correlations
description: 11 pages, 4 figures
First Infrastructure and Experimentation in Echo-debugging
Creators: name: Dupriez, Thomas
name: Costiou, Steven
name: Ducasse, Stéphane
Publisher: name: arXiv
Year: 2020
Subjects: subject: Programming Languages (cs.PL)
subject: Software Engineering (cs.SE)
subject: FOS: Computer and information sciences

description: As applications get developed, bugs inevitably get introduced. Often, it is unclear why a given code change introduced a given bug. To find this causal relation and more effectively debug, developers can leverage the existence of a previous version of the code, without the bug. But traditional debug-ging tools are not designed for this type of work, making this operation tedious. In this article, we propose as exploratory work the echo-debugger, a tool to debug two different executions in parallel, and the Convergence Divergence Mapping (CDM) algorithm to locate all the control-flow divergences and convergences of these executions. In this exploratory work, we present the architecture of the tool and a scenario to solve a non trivial bug.
Spectra of Free Diquark in the Bethe-Salpeter Approach
Creators: name: Yu, Yan-Ming
name: Ke, Hong-Wei
name: Ding, Yi-Bing
name: Guo, Xin-Heng
name: Jin, Hong-Ying
name: Li, Xue-Qian
name: Shen, Peng-Nian
name: Wang, Guo-Li
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In this work, we employ the Bethe-Salpeter (B-S) equation to investigate the spectra of free diquarks and their B-S wave functions. We find that the B-S approach can be consistently applied to study the diqaurks with two heavy quarks or one heavy and one light quarks, but for two light-quark systems, the results are not reliable. There are a few free parameters in the whole scenario which can only be fixed phenomenologically. Thus, to determine them, one has to study baryons which are composed of quarks and diquarks.
description: 16 pages, no figures
Wave dynamics of a six-dimensional black hole localized on a tensional three-brane
Creators: name: Chen, Songbai
name: Wang, Bin
name: Su, Ru-Keng
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study the quasinormal modes and the late-time tail behavior of scalar perturbation in the background of a black hole localized on a tensional three-brane in a world with two large extra dimensions. We find that finite brane tension modifies the standard results in the wave dynamics for the case of a black hole on a brane with completely negligible tension. We argue that the wave dynamics contains the imprint of the extra dimensions.
description: revised version, 10 pages, 1 table and 2 figures. Accepted for publication in Phys. Lett. B
Centrality and Energy Dependence of Proton, Light Fragment and Hyperon Production
Creators: name: Blume, C.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: Recent results of the NA49 collaboration are discussed. These include the energy dependence of stopping and the production of the light fragments t and 3He. New data on the system size dependence of hyperon production at 40A and 158AGeV are also presented.
description: 4 pages, Quark Matter 2006 proceedings
Galaxy Sizes Since $z=2$ from the Perspective of Stellar Mass Distribution within Galaxies
Creators: name: Mosleh, Moein
name: Hosseinnejad, Shiva
name: Hosseini-ShahiSavandi, S. Zahra
name: Tacchella, Sandro
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: How stellar mass assembles within galaxies is still an open question. We present measurements of the stellar mass distribution on kpc-scale for $\sim5500$ galaxies with stellar masses above $\log(M_{\ast}/M_{\odot})\geqslant9.8$ up to the redshift $2.0$. We create stellar mass maps from Hubble Space Telescope observations by means of the pixel-by-pixel SED fitting method. These maps are used to derive radii encompassing $20\%$, $50\%$, and $80\%$ ($r_{20}$, $r_{50}$ and $r_{80}$) of the total stellar mass from the best-fit Sérsic models. The reliability and limitations of the structural parameter measurements are checked extensively using a large sample ($\sim3000$) of simulated galaxies. The size-mass relations and redshift evolution of $r_{20}$, $r_{50}$ and $r_{80}$ are explored for star-forming and quiescent galaxies. At fixed mass, the star-forming galaxies do not show significant changes in their $r_{20}$, $r_{50}$ and $r_{80}$ sizes, indicating self-similar growth. Only above the pivot stellar mass of $\log(M_{\ast}/M_{\odot})\simeq10.5$, $r_{80}$ evolves as $r_{80}\propto(1+z)^{-0.85\pm0.20}$, indicating that mass builds up in the outskirts of these systems (inside-out growth). The Sérsic values also increase for the massive star-forming galaxies towards late cosmic time. Massive quiescent galaxies show stronger size evolution at all radii, in particular the $r_{20}$ sizes. For these massive galaxies, Sérsic values remain almost constant since at least $z\sim1.3$, indicating that the strong size evolution is related to the changes in the outer parts of these galaxies. We make all the structural parameters publicly available.
description: 32 pages, 15 figures and 3 appendices. Accepted for publication in ApJ
Prickly postglacial pioneers: freshwater plankton community composition influences fatty acid desaturase (FADS2) copy number in Southern Greenland threespine sticklebacks
Creators: name: Hudson, Cameron
name: Twining, Cornelia
name: Moosmann, Marvin
name: Greenway, Ryan
name: Feulner, Philine
name: Matthews, Blake
Publisher: name: Zenodo
Year: 2024
Subjects: adaptation
Colonization
FADS2
Long-chain polyunsaturated fatty acids
threespine stickleback
Copy number variation

description: The adaptation of marine fish to freshwater environments includes prodigious examples of rapid evolution. Given the scarcity of ω-3 long-chain polyunsaturated fatty acids (LC-PUFA) in freshwater, we expect selection to be strong on fish transitioning to freshwater habitats and yet the underlying ecological causes of genomic and phenotypic differentiation are poorly understood for traits associated with lipid content and composition. Threespine stickleback (Gasterosteus aculeatus) have repeatedly colonized, and adapted to, freshwater habitats across the northern hemisphere. These freshwater populations often show elevated copy number of the fatty acid desaturase 2 gene (FADS2), which increases the biosynthetic capacity of LC-PUFA. The starkly lower content of LC-PUFA in freshwater compared to marine prey, especially docosahexaenoic acid (DHA), likely imposes strong positive selection on freshwater fish for either increased biosynthesis or greater dietary acquisition of LC-PUFA. The recently colonized and relatively undisturbed threespine stickleback populations in postglacial coastal lakes of Southern Greenland offer an exceptional opportunity to study how variation in the copy number of FADS2 is related to abiotic and biotic conditions of lakes and their morphometry. As expected, given its position on the stickleback X chromosome, we found strong sexual dimorphism in FADS2 copy number in all populations (19 freshwater, 1 marine, and 1 brackish), and an increased dimorphism in some freshwater populations. We also found that FADS2 copy number was negatively correlated, for both males and females, with the abundance of copepods, which are a DHA-rich food source in the zooplankton community. Overall, our results suggest that the prey community context of lakes might influence the process of metabolic adaptation of marine fish colonizing freshwater ecosystems.
description: Funding provided by: Swiss Polar InstituteROR ID: https://ror.org/02z9ca723Award Number: PAF-2020-005
Funding provided by: Swiss National Science FoundationROR ID: https://ror.org/00yjd3n13Award Number: 31003A_175614
Study on the Assessment of the Quality of Experience of Streaming Video
Creators: name: Ivchenko, Aleksandr
name: Kononyuk, Pavel
name: Dvorkovich, Alexander
name: Antiufrieva, Liubov
Publisher: name: arXiv
Year: 2020
Subjects: subject: Multimedia (cs.MM)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Dynamic adaptive streaming over HTTP provides the work of most multimedia services, however, the nature of this technology further complicates the assessment of the QoE (Quality of Experience). In this paper, the influence of various objective factors on the subjective estimation of the QoE of streaming video is studied. The paper presents standard and handcrafted features, shows their correlation and p-Value of significance. VQA (Video Quality Assessment) models based on regression and gradient boosting with SRCC reaching up to 0.9647 on the validation subsample are proposed. The proposed regression models are adapted for applied applications (both with and without a reference video); the Gradient Boosting Regressor model is perspective for further improvement of the quality estimation model. We take SQoE-III database, so far the largest and most realistic of its kind. The VQA (video quality assessment) models are available at https://github.com/AleksandrIvchenko/QoE-assesment
description: 11 pages, 16 figures, 7 tables