cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Clues from microquasars to the origin of radio-loudness of quasars
Creators: name: Nipoti, Carlo
name: Blundell, Katherine M.
name: Binney, James
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We analysed the long-term variability of four microquasars (GRS 1915+105, Cyg X-1, Cyg X-3, and Sco X-1) in radio and X rays. The results of our analysis indicate the existence of two distinct modes of energy output, which we refer to as the `coupled' mode and the `flaring' mode. The coupled mode is responsible for mildly fluctuating, flat-spectrum radio emission, coupled with the X-ray emission; the flaring mode produces powerful, steep-spectrum radio flares, with no significant counterpart in X rays. We find that the fraction of time spent by a typical microquasar in the flaring mode is similar to the fraction of quasars that are radio-loud. This is consistent with the hypothesis that radio-loudness of quasars is a function of the epoch at which the source is observed.
description: 5 pages, 2 figures. Accepted for publication in the proceedings of the "VI Microquasar Workshop: Microquasars and Beyond" (September 18-22, 2006 Como, Italy). Available from pos.sissa.it
Generalizing the Soldering procedure
Creators: name: Dalmazi, D.
name: Dutra, A. de Souza
name: Abreu, E. M. C.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We start this work by revisiting the problem of the soldering of two chiral Schwinger models of opposite chiralities. We verify that, in contrast with what one can conclude from the soldering literature, the usual sum of these models is, in fact, gauge invariant and corresponds to a composite model, where the component models are the vector and axial Schwinger models. As a consequence, we reinterpret this formalism as a kind of degree of freedom reduction mechanism. This result has led us to discover a second soldering possibility giving rise to the axial Schwinger model. This new result is seemingly rather general. We explore it here in the soldering of two Maxwell-Chern-Simons theories with different masses.
description: 15 pages, no figures, to appear in Phys. Rev. D
Analysis of Dilepton Invariant Mass Spectrum in C+C at 2 and 1 AGeV
Creators: name: Thomère, M.
name: Hartnack, C.
name: Wolf, G.
name: Aichelin, J.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Recently the HADES collaboration has published the invariant mass spectrum of $e^+e^-$ pairs, dN/dM$_{e^+e^-}$, produced in C+C collisions at 2 AGeV. Using electromagnetic probes, one hopes to get in this experiment information on hadron properties at high density and temperature. Simulations show that firm conclusions on possible in-medium modifications of meson properties will only be possible when the elementary meson production cross sections, especially in the pn channel, as well as production cross sections of baryonic resonances are better known. Presently one can conclude that a) simulations overpredict by far the cross section at $M_{e^+e^-} \approx M_ω{^0}$ if free production cross sections are used and that b) the upper limit of the $η$ decay into $e^+e^-$ is smaller than the present upper limit of the Particle Data Group. This is the result of simulations using the Isospin Quantum Molecular Dynamics (IQMD) approach.
description: 28 pages, 15 figures, 3 tables, ps file recommended
Ecotopia 2121: Car-freeCities of the 22nd Century
Creators: name: Marshall, Alan
Publisher: name: Faculty of Environment and Resourdce Studies,Mahidol University
Year: 2015
Subjects: Utopia Cities,Future Car-free, Sustainability Society,Abu Dhabi,Denver,Perth, San Diego,Sao Paulo

description: 1, 13, Environment and Natural Resources Journal
Massive stars exploding in a He-rich circumstellar medium III. SN 2006jc: IR echoes from new and old dust in the progenitor CSM
Creators: name: Mattila, S.
name: Meikle, W. P. S.
name: Lundqvist, P.
name: Pastorello, A.
name: Kotak, R.
name: Eldridge, J.
name: Smartt, S.
name: Adamson, A.
name: Gerardy, C. L.
name: Rizzi, L.
name: Stephens, A. W.
name: Van Dyk, S. D.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present near- and mid-infrared (IR) photometric data of the Type Ibn supernova (SN) 2006jc obtained with the United Kingdom Infrared Telescope (UKIRT), the Gemini North Telescope, and the Spitzer Space Telescope between days 86 and 493 post-explosion. We find that the IR behaviour of SN 2006jc can be explained as a combination of IR echoes from two manifestations of circumstellar material. The bulk of the near-IR emission arises from an IR echo from newly-condensed dust in a cool dense shell (CDS) produced by the interaction of the ejecta outward shock with a dense shell of circumstellar material ejected by the progenitor in a luminous blue variable (LBV) like outburst about two years prior to the SN explosion. The CDS dust mass reaches a modest 3.0 x 10^(-4) M(solar) by day 230. While dust condensation within a CDS formed behind the ejecta inward shock has been proposed before for one event (SN 1998S), SN 2006jc is the first one showing evidence for dust condensation in a CDS formed behind the ejecta outward shock in the circumstellar material. At later epochs, a substantial and growing contribution to the IR fluxes arises from an IR echo from pre-existing dust in the progenitor wind. The mass of the pre-existing CSM dust is at least ~8 x 10^(-3) M(solar). This work therefore adds to the evidence that mass-loss from the progenitors of core-collapse supernovae could be a major source of dust in the universe. However, yet again, we see no direct evidence that the explosion of a supernova produces anything other than a very modest amount of dust.
description: 18 pages, 10 figures, accepted to MNRAS
Η πνευματική ζωή κατά τη διδασκαλία του αγίου Κοσμά του Αιτωλού
Creators: name: Μπούτα, Ζωή Γεωργίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2020
Subjects: διδαχές αγ. Κοσμά του Αιτωλού
πνευματική ζωή
αρετές στη χριστιανική ζωή
St Cosma Aitolos’ teaching
spiritual life
christian virtues

description: Στήν παρούσα μελέτη καταβλήθηκε προσπάθεια νά παρουσιαστούν οι βασικοί άξονες της πνευματικης ζωής όπως διακρίνονται μέσα στήν διδασκαλία του Αγίου Κοσμα του Αιτωλού. Στή διδασκαλία του Αγίου ειναι συνυφασμένο το ορθόδοξο φρόνημα με τη δογματική ακρίβεια. Όσα αναφέρονται στίς Διδαχές, αποδεικνύουν πώς ο Άγιος διδάσκει την πορεία προς την πνευματική τελειότητα χωρίς καθόλου να αυτονομεί τή δογματική αλήθεια της πίστης από το ήθος της Εκκλησίας. Γιά τόν λόγο αυτό, πάντοτε στό κήρυγμά του προσπαθώντας νά μεταγγίσει το βίωμά του στους αδελφούς του, αναφέρεται στην ορθή πίστη εξηγώντας με απλοϊκό τρόπο βασικές δογματικές αλήθειες της Ορθοδοξίας. Παράλληλα, χειραγωγεί στην εν Χριστω καινή ζωή καυτηριάζοντας τα πάθη, στα οποία βλέπει υποδουλωμένα τα μέλη του ποιμνίου του αντιπροτείνοντας την ηθική των αρετών του Ευαγγελίου. Προκειμένου να γίνει αντιληπτός, αξιοποιεί τόν Κυριακό λόγο, παραδείγματα από την λειτουργική ζωή της εκκλησίας καθώς επίσης και από τους βίους των αγίων. Εφόσον η ηθική του Ευαγγελίου αναφέρεται σέ όλες τίς πτυχές της ανθρώπινης ζωής, προσφέρει διδασκαλία αναφορικά καί μέ τόν ευαίσθητο τομέα της κοινωνικής ζωής. Αυτό ειναι ευδιάκριτο μέσα στίς Διδαχές του, όπου ο αναγνώστης διακρίνει την ορθόδοξη κοινωνικότητα, που απηχεί τη ζωή της εκκλησίας καί την παραδοσιακή πατερική θέση. Ο Άγιος Κοσμάς, αποδεικνύεται ένας θεοφώτιστος διδάσκαλος και διακριτικός χειραγωγός της πνευματικής ζωής υποδεικνύοντας στους χριστιανούς τή νηφάλια προσαρμογή των υποθηκῶν του Ευαγγελίου και της Χριστιανικής Παράδοσης ακόμη και στις σημερινές πνευματικές και κοινωνικές συνθήκες
description: In this dessertation, the circumstances under which Christians should live, according to Saint Kosmas’ teachings were examined. Despite the fact that his the way in which he spoke was especially simple, he managed to convey the message of the Holy Gospel in a rather lively, descriptive and graceful way. As Holy Father Kosmas had fully applied God’s word in his life, was able to teach and guide others on how to lead an Orthodox life. The teachings of Saint Kosmas present the basic axes of the Christian spiritual life according to the Gospel’s commandments. It concerns all the aspects of a person’s life representing the theology of the Orthodox Christian Ethics. This means that he spoke about the uniqueness of faith, dogmatic, family life, education, protection of the environment and –generally- the social life. After all, Saint Kosmas turns out to be a guard of the greek-orthodox treasury not only for the era he lived in, but also throughout the eons. This is the reason why everyone who reads his speeches after so many years ( known as Didahes) feels like they’re indulging in the original Christian wisdom
Machine-learning-enabled vectorial opto-magnetization orientation
Creators: name: Yan, Weichao
name: Nie, Zhongquan
name: Zeng, Xunwen
name: Dai, Guohong
name: Shen, Yun
name: Deng, Xiaohua
Publisher: name: arXiv
Year: 2021
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Manipulation of light-induced magnetization has become a fundamentally hot topic with a potentially high impact for atom trapping, confocal and magnetic resonance microscopy, and data storage. The control of the magnetization orientation mainly relies on the direct methods composed of amplitude, phase and polarization modulations of the incident light under the tight focusing condition, leaving the achievement of arbitrary desirable three-dimensional (3D) magnetization orientation complicated, inflexible and inefficient. Here, we propose a facile approach called machine learning inverse design to achieve expected vectorial opto-magnetization orientation. This pathway is time-efficient and accurate to produce the demanded incident beam for arbitrary prescribed 3D magnetization orientation. It is highlighted that the machine learning method is not only applied for magnetization orientations, but also widely used in the control of magnetization structures.
Exergetic Evaluation of Renewability for Renewable Electricity Generation in Thailand
Creators: name: Sedpho, Surat
name: Sate Sampattagul
Publisher: name: Faculty of Environment and Resourdce Studies,Mahidol University
Year: 2015
Subjects: Exergetic Efficiency,Renewability,Renewable Power Generation

description: 1, 13, Environment and Natural Resources Journal
Multiwavelength Mass Comparisons of the z~0.3 CNOC Cluster Sample
Creators: name: Hicks, Amalia K.
name: Ellingson, Erica
name: Hoekstra, Henk
name: Yee, Howard
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Results are presented from a detailed analysis of optical and X-ray observations of moderate-redshift galaxy clusters from the Canadian Network for Observational Cosmology (CNOC) subsample of the EMSS. The combination of extensive optical and deep X-ray observations of these clusters make them ideal candidates for multiwavelength mass comparison studies. X-ray surface brightness profiles of 14 clusters with 0.17
description: Astrophysical Journal, 48 pages, 11 figures, LaTeX. Added correction to surface brightness normalization of MS1512.4+3647, corrections to sample gas mass fractions and calculated value of Omega_m. Figure resolution has been reduced to comply with astro-ph upload requirements
Radial spreading of vertical buoyant jets in shallow water
Creators: name: MacLatchy, Michael R
Publisher: name: University of British Columbia
Year: 2008

description: Many wastewaters are discharged from single vertical outlets located at the bottom of shallow water bodies. Often these effluents are buoyant with respect to the receiving environment. In many jurisdictions, regulations require that a certain dilution is achieved within a specified mixing zone. In shallow water it is likely that a portion of this dilution will have to be achieved in the radially spreading surface region of the jet. The degree of dilution obtained in the radial surface buoyant jet region will depend upon the buoyancy and velocity of the effluent, and the depth of water available. Prior to the installation of an outfall, the dilution that will be achieved and behaviour of the flow must be modeled in developing the design to meet regulatory and other requirements. Unfortunately, radially spreading flows are not clearly understood, and their behaviour is the subject of some controversy. This study was intended to identify the details of the structure of the radially spreading upper layer associated with the discharge of a vertical buoyant jet in shallow water. Collection and analysis of detailed numerical data was not the focus or intent of this study, flow visualization was relied upon to investigate the radially spreading surface flow. Experiments to study the mechanisms of the radially spreading surface flow were conducted with a series of vertical buoyant jets discharged into a shallow tank. This experimental tank was specially designed to simulate an infinite ambient, and avoid downstream control effects. A range of flow rates and port diameters were utilized to determine the nature of the flow structure in the surface region. Flow visualization was used to examine the flow and obtain an understanding of the mechanisms present to aid in modeling. Four regions of flow are present when a buoyant jet is discharged vertically in shallow water. The first of these is the vertical buoyant jet region, in which the vertical jet is entraining fluid as the flow moves upward to the surface. Next is a surface impingement region, where the vertical flow arrives at the surface, and is redirected to an outward, radially spreading surface flow. The first of two surface regions is the radial buoyant jet region, in which the momentum of the fluid dominates. This study determined that in this region the surface flow exists as a series of billows or vortices into which ambient fluid is entrained as they grow and move radially outward. Eventually this flow will have spread out, and entrained enough fluid, that the interfacial shear will decrease to the point where buoyancy will dominate. The large scale billows will collapse, to be replaced by smaller less vigorous interfacial instabilities, as the second surface region, the radial buoyant plume region, is entered. Contrary to the assumptions made by some researchers, no radial internal hydraulic jumps were detected in the radially spreading surface flow regions.
Applications of Atmospheric Dispersion Model for Air Quality Assessment of NOx and SO2 from Waste Incinerator
Creators: name: Rachen Koomsang
name: Sirirat Chuchue
name: Thongchai Kanabkaew
Publisher: name: Faculty of Environment and Resourdce Studies,Mahidol University
Year: 2015
Subjects: Oxides of Nitrogen, Sulfur Dioxide,Atmospheric Dispersion Model,AERMOD

description: 1, 13, Environment and Natural Resources Journal
Robustness Evaluation of Stacked Generative Adversarial Networks using Metamorphic Testing
Creators: name: Park, Hyejin
name: Waseem, Taaha
name: Teo, Wen Qi
name: Low, Ying Hwei
name: Lim, Mei Kuan
name: Chong, Chun Yong
Publisher: name: arXiv
Year: 2021
Subjects: subject: Software Engineering (cs.SE)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Synthesising photo-realistic images from natural language is one of the challenging problems in computer vision. Over the past decade, a number of approaches have been proposed, of which the improved Stacked Generative Adversarial Network (StackGAN-v2) has proven capable of generating high resolution images that reflect the details specified in the input text descriptions. In this paper, we aim to assess the robustness and fault-tolerance capability of the StackGAN-v2 model by introducing variations in the training data. However, due to the working principle of Generative Adversarial Network (GAN), it is difficult to predict the output of the model when the training data are modified. Hence, in this work, we adopt Metamorphic Testing technique to evaluate the robustness of the model with a variety of unexpected training dataset. As such, we first implement StackGAN-v2 algorithm and test the pre-trained model provided by the original authors to establish a ground truth for our experiments. We then identify a metamorphic relation, from which test cases are generated. Further, metamorphic relations were derived successively based on the observations of prior test results. Finally, we synthesise the results from our experiment of all the metamorphic relations and found that StackGAN-v2 algorithm is susceptible to input images with obtrusive objects, even if it overlaps with the main object minimally, which was not reported by the authors and users of StackGAN-v2 model. The proposed metamorphic relations can be applied to other text-to-image synthesis models to not only verify the robustness but also to help researchers understand and interpret the results made by the machine learning models.
description: 8 pages, accepted at the 6th International Workshop on Metamorphic Testing (MET'21)
The OTELO survey: the star formation rate evolution of low-mass galaxies
Creators: name: Cedrés, Bernabé
name: Pérez-García, Ana María
name: Pérez-Martínez, Ricardo
name: Cerviño, Miguel
name: Gallego, Jesús
name: Bongiovanni, Ángel
name: Cepa, Jordi
name: Martínez, Rocío Navarro
name: Nadolny, Jakub
name: Lara-López, Maritza A.
name: Sánchez-Portal, Miguel
name: Alfaro, Emilio J.
name: de Diego, José A.
name: González-Otero, Mauro
name: González, J. Jesús
name: González-Serrano, J. Ignacio
name: Torres, Carmen P. Padilla
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present the analysis of a sample of \ha\,, \hb\ and \oii\ emission line galaxies from the \otelo\ survey, with masses typically below $log(M_*/M_\sun) \sim 9.4$ and redshifts between $z \sim 0.4$ and 1.43. We study the star formation rate, star formation rate density, and number density and their evolution with redshift. We obtain a robust estimate of the specific star formation rate -- stellar mass relation based on the lowest mass sample published so far. We also determine a flat trend of the star formation rate density and number density with redshift. Our results suggest a scenario of no evolution of the number density of galaxies, regardless of their masses, up to redshift $z\sim1.4$. This implies a gradual change of the relative importance of the star forming processes, from high-mass galaxies to low-mass galaxies, with decreasing redshift. We also find little or no variation of the star formation rate density in the redshift range of $0.4
description: 8 pages, 3 figures, accepted for publication in ApJ letters
Effects of Climate Variability on Monthly Growth of Aglaia odoratissima and Hydnocarpus ilicifolia at the Sakaerat Environmental Research Station (SERS), Northeastern Thailand
Creators: name: Kritsadapan Palakit
name: Khwanchai Duangsathaporn
name: Somkid Siripatanadilok
name: Pichit Lumyai
Publisher: name: Faculty of Environment and Resourdce Studies,Mahidol University
Year: 2015
Subjects: Leaf phenology,Outside bark diameter,Path analysis,Inside bark diameter

description: 1, 13, Environment and Natural Resources Journal
Additional file 2 of Vitamin C improves the therapeutic potential of human amniotic epithelial cells in premature ovarian insufficiency disease
Creators: name: Hou, Shunyu
name: Ding, Chenyue
name: Shen, Han
name: Qian, Chunfeng
name: Zou, Qinyan
name: Lu, Jiafeng
name: Huang, Boxian
name: Tan, Jichun
name: Li, Hong
Publisher: name: figshare
Year: 2020
Subjects: subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Physiology
subject: Pharmacology
subject: Chemical Sciences not elsewhere classified
subject: Immunology
subject: FOS: Clinical medicine
subject: Mathematical Sciences not elsewhere classified
subject: Developmental Biology
subject: Cancer
subject: Hematology

description: Additional file 2: Table S1. Information regarding the flow cytometry antibodies.
Mutation, selection, and ancestry in branching models: a variational approach
Creators: name: Baake, Ellen
name: Georgii, Hans-Otto
Publisher: name: arXiv
Year: 2006
Subjects: subject: Populations and Evolution (q-bio.PE)
subject: Probability (math.PR)
subject: FOS: Biological sciences
subject: FOS: Mathematics

description: We consider the evolution of populations under the joint action of mutation and differential reproduction, or selection. The population is modelled as a finite-type Markov branching process in continuous time, and the associated genealogical tree is viewed both in the forward and the backward direction of time. The stationary type distribution of the reversed process, the so-called ancestral distribution, turns out as a key for the study of mutation-selection balance. This balance can be expressed in the form of a variational principle that quantifies the respective roles of reproduction and mutation for any possible type distribution. It shows that the mean growth rate of the population results from a competition for a maximal long-term growth rate, as given by the difference between the current mean reproduction rate, and an asymptotic decay rate related to the mutation process; this tradeoff is won by the ancestral distribution. Our main application is the quasispecies model of sequence evolution with mutation coupled to reproduction but independent across sites, and a fitness function that is invariant under permutation of sites. Here, the variational principle is worked out in detail and yields a simple, explicit result.
description: 45 pages,8 figures
Fast Beam Training and Alignment for IRS-Assisted Millimeter Wave/Terahertz Systems
Creators: name: Wang, Peilan
name: Fang, Jun
name: Zhang, Wei
name: Li, Hongbin
Publisher: name: arXiv
Year: 2021
Subjects: subject: Signal Processing (eess.SP)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Intelligent reflecting surface (IRS) has emerged as a competitive solution to address blockage issues in millimeter wave (mmWave) and Terahertz (THz) communications due to its capability of reshaping wireless transmission environments. Nevertheless, obtaining the channel state information of IRS-assisted systems is quite challenging because of the passive characteristics of the IRS. In this paper, we consider the problem of beam training/alignment for IRS-assisted downlink mmWave/THz systems, where a multi-antenna base station (BS) with a hybrid structure serves a single-antenna user aided by IRS. By exploiting the inherent sparse structure of the BS-IRS-user cascade channel, the beam training problem is formulated as a joint sparse sensing and phaseless estimation problem, which involves devising a sparse sensing matrix and developing an efficient estimation algorithm to identify the best beam alignment from compressive phaseless measurements. Theoretical analysis reveals that the proposed method can identify the best alignment with only a modest amount of training overhead. Simulation results show that, for both line-of-sight (LOS) and NLOS scenarios, the proposed method obtains a significant performance improvement over existing state-of-art methods. Notably, it can achieve performance close to that of the exhaustive beam search scheme, while reducing the training overhead by 95%.
Semicomplete Arithmetic Sequences, Division of Hypercubes, and the Pell Constant
Creators: name: Hoelscher, Zachary
Publisher: name: arXiv
Year: 2021
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 05A17, 11B65

description: In this paper we produce a few continuations of our previous work on partitions into fractions. Specifically, we study strictly increasing integer sequences $\{n_j\}$ such that there are partitions for all integers less than the floor of $G$, where $G=\frac{n_1}{j} + \frac{n_2}{j} + \cdots + \frac{n_{j-1}}{j}+\frac{n_j}{j}$, and all summands are distinct terms drawn from $\frac{n_1}{j} + \frac{n_2}{j} + \cdots + \frac{n_{j-1}}{j}+\frac{n_j}{j}$. We call such sequences \enquote{semicomplete}. We find that there are only three semicomplete arithmetic sequences. We also study sequences that give the maximum number of pieces that an $M$ dimensional hypercube can be cut into using $N-1$ hyperplanes. We find that these are semicomplete in one, two, three, and four dimensions. As an aside, we use one of our generating functions to produce what appears to be a new identity for the Pell constant, a number which is closely connected to the density of solutions to the negative Pell equation.
Field quantization in inhomogeneous anisotropic dielectrics with spatio-temporal dispersion
Creators: name: Suttorp, L. G.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: A quantum damped-polariton model is constructed for an inhomogeneous anisotropic linear dielectric with arbitrary dispersion in space and time. The model Hamiltonian is completely diagonalized by determining the creation and annihilation operators for the fundamental polariton modes as specific linear combinations of the basic dynamical variables. Explicit expressions are derived for the time-dependent operators describing the electromagnetic field, the dielectric polarization and the noise term in the latter. It is shown how to identify bath variables that generate the dissipative dynamics of the medium.
description: 24 pages
With Great Power Comes the Responsible Use of Metrics
Creators: name: Sewell, Claire
Publisher: name: Apollo - University of Cambridge Repository
Year: 2019
Subjects: metrics
responsible metrics
librarianship
scholarly communication
research support

description: Metrics have long been used as an indicator of academic success and as a way to make key decisions. As the measurement of impact becomes increasingly important within academia there has been something of a backlash against trusting purely quantitative methods of assessment. The Responsible Metrics movement aims to ensure that metrics are used fairly alongside other measures to gather a true assessment of impact. This webinar will discuss what the Responsible Metrics movement is, why it was developed, its importance and how library staff can best educate their research staff.
K^0 pi^0 Sigma^+ and K^*0 Sigma^+ photoproduction off the proton
Creators: name: TAPS Collaboration
name: Nanova, M.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: The exclusive reactions $γp \to K^{*0} Σ^+(1189)$ and $γp \to K^{0} π^{0}Σ^+(1189)$, leading to the p 4$π^{0}$ final state, have been measured with a tagged photon beam for incident energies from threshold up to 2.5 GeV. The experiment has been performed at the tagged photon facility of the ELSA accelerator (Bonn). The Crystal Barrel and TAPS detectors were combined to a photon detector system of almost 4$π$ geometrical acceptance. Differential and total cross sections are reported. At energies close to the threshold, a flat angular distribution has been observed for the reaction $γp\to K^{0} π^{0}Σ^+$ suggesting dominant s-channel production. $Σ^*(1385)$ and higher lying hyperon states have been observed. An enhancement in the forward direction in the angular distributions of the reaction $γp \to K^{*0}Σ^+$ indicates a $t$-channel exchange contribution to the reaction mechanism. The experimental data are in reasonable agreement with recent theoretical predictions.
description: 11 pages, 13 figures, submitted to EPJA
Dichotomy of Electron-Phonon Coupling in Graphene Moiré Flat Bands
Creators: name: Choi, Young Woo
name: Choi, Hyoung Joon
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Graphene moire superlattices are outstanding platforms to study correlated electron physics and superconductivity with exceptional tunability. However, robust superconductivity has been measured only in magic-angle twisted bilayer graphene (MA-TBG) and magic-angle twisted trilayer graphene (MA-TTG). The absence of a superconducting phase in certain moire flat bands raises a question on the superconducting mechanism. In this work, we investigate electronic structure and electron-phonon coupling in graphene moire superlattices based on atomistic calculations. We show that electron-phonon coupling strength lambda is dramatically different among graphene moire flat bands. The total strength lambda is very large (lambda>1) for MA-TBG and MA-TTG, both of which display robust superconductivity in experiments. However, lambda is an order of magnitude smaller in twisted double bilayer graphene (TDBG) and twisted monolayer-bilayer graphene (TMBG) where superconductivity is reportedly rather weak or absent. We find that the Bernal-stacked layers in TDBG and TMBG induce sublattice polarization in the flat-band states, suppressing intersublattice electron-phonon matrix elements. We also obtain the nonadiabatic superconducting Tc that matches well with the experimental results. Our results clearly show a correlation between strong electron-phonon coupling and experimental observations of robust superconductivity.
description: 6 pages for the main text (including 4 figures and 1 table) and 3 pages for Supplemental Material
Event shapes in deep inelastic scattering at HERA
Creators: name: ZEUS Collaboration
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Mean values and differential distributions of event-shape variables have been studied in neutral current deep inelastic scattering using an integrated {luminosity} of 82.2 pb$^{-1}$ collected with the ZEUS detector at HERA. The kinematic range was $80 < Q^2 < 20 480\gev^2$ and $0.0024 < x < 0.6$, where $Q^2$ is the virtuality of the exchanged boson and $x$ is the Bjorken variable. The data are compared with a model based on a combination of next-to-leading-order QCD calculations with next-to-leading-logarithm corrections and the Dokshitzer-Webber non-perturbative power corrections. The power-correction method provides a reasonable description of the data for all event-shape variables studied. Nevertheless, the lack of consistency of the determination of $α_s$ and of the non-perturbative parameter of the model, $\albar$, suggests the importance of higher-order processes that are not yet included in the model.
description: 35 pages, 11 figures
Cooling a nanomechanical resonator with quantum back-action
Creators: name: Naik, A.
name: Buu, O.
name: LaHaye, M. D.
name: Armour, A. D.
name: Clerk, A. A.
name: Blencowe, M. P.
name: Schwab, K. C.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Quantum mechanics demands that the act of measurement must affect the measured object. When a linear amplifier is used to continuously monitor the position of an object, the Heisenberg uncertainty relationship requires that the object be driven by force impulses, called back-action. Here we measure the back-action of a superconducting single-electron transistor (SSET) on a radiofrequency nanomechanical resonator. The conductance of the SSET, which is capacitively coupled to the resonator, provides a sensitive probe of the latter's position;back-action effects manifest themselves as an effective thermal bath, the properties of which depend sensitively on SSET bias conditions. Surprisingly, when the SSET is biased near a transport resonance, we observe cooling of the nanomechanical mode from 550mK to 300mK-- an effect that is analogous to laser cooling in atomic physics. Our measurements have implications for nanomechanical readout of quantum information devices and the limits of ultrasensitive force microscopy (such as single-nuclear-spin magnetic resonance force microscopy). Furthermore, we anticipate the use of these backaction effects to prepare ultracold and quantum states of mechanical structures, which would not be accessible with existing technology.
description: 28 pages, 7 figures; accepted for publication in Nature
Enhanced effects on extracting γfrom untagged B^0 and B_s decays
Creators: name: Gronau, Michael
name: Grossman, Yuval
name: Surujon, Ze'ev
name: Zupan, Jure
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The weak phase γcan be determined using untagged B^0\to DK_S or B_s\to Dϕ, Dη^{(')} decays. In the past, the small lifetime difference y\equiv ΔΓ/(2Γ) has been neglected in B^0, while the CP violating parameter ε\equiv 1-|q/p|^2 has been neglected in both B^0-\bar B^0 and B_s-\bar B_s mixing. We estimate the effect of neglecting y and ε. We find that in D decays to flavor states this introduces a systematic error, which is enhanced by a large ratio of Cabibbo-allowed to doubly Cabibbo-suppressed D decay amplitudes.
description: one reference added, to be submitted for publication in Physics Letters B
Location updating and paging strategies in a cellular system
Creators: name: Lam, Kenny C. H.
Publisher: name: University of British Columbia
Year: 2008

description: The problem of locating a mobile user in a cellular system is addressed. The mobility of a user is modelled by a two-dimensional directional random walk process. A location updating scheme based on overlapping location areas (LA's) is presented for keeping track of the LA a user is in. Two LA paging schemes, namely spread paging and selective paging, are proposed and are compared to a conventional flood paging scheme in which all cells in the LA are paged simultaneously. It is found that both spread paging and selective paging can yield typical paging traffic reductions of more than 50%. The cost is a small increase in the average paging delay. Selective paging performs better than spread paging in terms of both average paging delay and average paging traffic, but is more complex to implement. An LA sectorization technique is applied to spread paging and selective paging to further reduce paging traffic. Two sectorization patterns are examined. The results show that sectorization can yield typical average paging traffic reductions of about 50%. The resulting increases in paging delay are negligible for both patterns. The sensitivity of spread paging and selective paging to uncertainty in user mobility parameter values, such as the angular deviation parameter, mean speed, mean velocity hold time and mean trip length, is studied. It is found that spread paging is most sensitive to the mean trip length of a user while selective paging is most sensitive to uncertainty in user mean speed.
Non-Abelian fracton order from gauging a mixture of subsystem and global symmetries
Creators: name: Tu, Yi-Ting
name: Chang, Po-Yao
Publisher: name: arXiv
Year: 2021
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We demonstrate a general gauging procedure of a pure matter theory on a lattice with a mixture of subsystem and global symmetries. This mixed symmetry can be either a semidirect product of a subsystem symmetry and a global symmetry, or a non-trivial extension of them. We demonstrate this gauging procedure on a cubic lattice in three dimensions with four examples: $G=\mathbb{Z}_3^{\text{sub}} \rtimes \mathbb{Z}_2^{\text{glo}}$, $G=(\mathbb{Z}_2^{\text{sub}} \times \mathbb{Z}_2^{\text{sub}}) \rtimes \mathbb{Z}_2^{\text{glo}}$, $1\to \mathbb {Z}_2^\text {sub}\to G\to \mathbb {Z}_2^\text {glo}\to 1$, and $1\to \mathbb {Z}_2^\text {sub}\to G\to K_4^\text {glo}\to 1$. The former two cases and the last one produce the non-Abelian fracton orders. Our construction of the gauging procedure provides an identification of the electric charges of these fracton orders with irreducible representations of the symmetry. Furthermore, by constraining the local Hilbert space, the magnetic fluxes with different geometry (tube-like and plaquette-like) satisfy a subalgebra of the quantum double models (QDMs). This algebraic structure leads to an identification of the magnetic fluxes to the conjugacy classes of the symmetry.
description: 2 columns, 24 pages, 4 tables
SSD-resnet34 model
Creators: name: Xilinx_ai
Publisher: name: Zenodo
Year: 2019

description: SSD-resnet34 model © Copyright 2019 Xilinx, Inc. Application: Object Detection
 ML Task: ResNet-34-SSD
 Framework: tensorflow 1.12
 Training Information:
 Quality: mmAP 22.1%
 Precision: single-precision float
 Is Quantized: no
 Is ONNX: no
 Dataset: COCO Please download: tf_ssd_resnet34_22.1.zip
 Model filename: resnet34_tf.22.1.pb
 Model details: https://github.com/lji72/inference/tree/tf_ssd_resent34_align_onnx/others/cloud/single_stage_detector/tensorflow
Layer Coherent Phase in Double Layer graphene at $ν^{}_1=ν^{}_2=0$
Creators: name: Saha, Amartya
name: Das, Ankur
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: In the recent advancement in graphene heterostructures, it is possible to create a double layer tunnel decoupled graphene system that has a strong interlayer electronic interaction. In this work, we restrict the parameters in the low energy effective Hamiltonian using simple symmetry arguments. Then, we study the ground state of this system in the Hartree-Fock approximation at $ν^{}_1=ν^{}_2=0$. In addition to the phases found in monolayer graphene, we found an existence of layer coherent phase which breaks the layer $U(1)$ symmetry. At non-zero Zeeman coupling strength ($E^{}_z$), this layer coherent state has a small magnetization, that vanishes when $E^{}_z$ tends to zero. We discuss the bulk gapless modes using the Goldstone theorem. We also comment on the edge structure for the layer coherent phase.
description: 8 pages, 3 figures
Robustness of adiabatic passage trough a quantum phase transition
Creators: name: Fubini, Andrea
name: Falci, Giuseppe
name: Osterloh, Andreas
Publisher: name: arXiv
Year: 2007
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We analyze the crossing of a quantum critical point based on exact results for the transverse XY model. In dependence of the change rate of the driving field, the evolution of the ground state is studied while the transverse magnetic field is tuned through the critical point with a linear ramping. The excitation probability is obtained exactly and is compared to previous studies and to the Landau-Zener formula, a long time solution for non-adiabatic transitions in two-level systems. The exact time dependence of the excitations density in the system allows to identify the adiabatic and diabatic regions during the sweep and to study the mesoscopic fluctuations of the excitations. The effect of white noise is investigated, where the critical point transmutes into a non-hermitian ``degenerate region''. Besides an overall increase of the excitations during and at the end of the sweep, the most destructive effect of the noise is the decay of the state purity that is enhanced by the passage through the degenerate region.
description: 16 pages, 15 figures
Construction of $A$-$B$ hetero-layer intermetallic crystals: case studies of the 1144-phase TM-phosphides \textit{AB}(TM)$_4$P$_4$ (TM=Fe, Ru, Co, Ni
Creators: name: Song, B. Q.
name: Xu, Mingyu
name: Borisov, Vladislav
name: Palasyuk, Olena
name: Wang, C. Z.
name: Valenti, Roser
name: Canfield, Paul C.
name: Ho, K. M.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The discovery of the 1144-phase, e.g. CaKFe$_4$As$_4$, creates opportunities to build novel intermetallics with alternative stacking of two parent compounds. Here we formalize the idea by defining a class of bulk crystalline solids with $A$-$B$ stacking (including 1144-phases and beyond), which is a generalization of hetero-structures from few-layer or thin-film semi-conductors to bulk intermetallics. Theoretically, four families of phosphides \textit{AB}(TM)$_4$P$_4$ (TM=Fe, Ru, Co, Ni) are investigated by first-principles calculations, wherein configurational, vibrational and electronic degrees of freedom are considered. It predicts a variety of stable 1144-phases (especially Ru- and Fe-phosphides). Stability rules are found and structural/electronic properties are discussed. Experimentally, we synthesize high-purity CaKRu$_4$P$_4$ as a proof of principle example. The synthetic method is simple and easily applied. Moreover, it alludes to a strategy to explore complex multi-component compounds, facilitated by a phase diagram coordinated by collective descriptors.
description: 15 pages, 9 figures
Physics process of cosmogenics Li-9 and He-8 production on muons interactions with carbon target in liquid scintillator
Creators: name: Zbiri, Karim
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Simulations were performed with GEANT4 to study the cosmogenics Li-9 and He-8 production by the interactions of the muons and their secondary shower particles in the liquid scintillator. The photonuclear reactions seem dominate their production. Their energy dependence were deduced. The comparisons with available data show the reliability of the simulations results.
description: 10 pages, 4 figures, 1 table
Forest Habitat and Fruit Availability of Hornbills in Salakphra Wildlife Sanctuary, Kanchanaburi Province,Thailand
Creators: name: Hata, Hiroki
name: Vijak Chimchome
name: Jongdee To-Im
Publisher: name: Faculty of Environment and Resourdce Studies,Mahidol University
Year: 2015
Subjects: Forest Habitat,Fruit Availability, Hornbill, Salakphra Wildlife Sanctuary

description: 1, 13, Environment and Natural Resources Journal
$R$RuB$_{2}$ ($R$=Y, Lu), topological superconductor candidates with hourglass-type Dirac ring
Creators: name: Gao, Yan
name: Guo, Peng-Jie
name: Liu, Kai
name: Lu, Zhong-Yi
Publisher: name: arXiv
Year: 2021
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Topological properties and topological superconductivity in real materials have attracted intensive experimental and theoretical attention recently. Based on symmetry analysis and first-principles electronic structure calculations, we predict that $R$RuB$_{2}$ ($R$=Y, Lu) are not only topological superconductor (TSC) candidates, but also own the hybrid hourglass-type Dirac ring which is protected by the nonsymmorphic space group symmetry. Due to the band inversion around the time-reversal invariant $Γ$ point in the Brillouin zone,$R$RuB$_{2}$ also have Dirac topological surface states (TSSs). More importantly, their TSSs on the (010) surface are within the band gap of bulk and cross the Fermi level, which form single Fermi surfaces. Considering the fact that both YRuB$_{2}$ and LuRuB$_{2}$ are superconductors with respective superconducting transition temperatures ($T_c$) of 7.6 K and 10.2 K, the superconducting bulks will likely induce superconductivity in the TSSs via the proximity effect. The ternary borides $R$RuB$_{2}$ may thus provide a very promising platform for studying the properties of topological superconductivity and hourglass fermions in the future experiments.
description: 7 pages, 4 figures, 1 table
Neutrino Masses and Interactions in a Model with Nambu-Goldstone Bosons
Creators: name: Paschos, E. A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: A natural scenario for the generation of neutrino masses is the see-saw mechanism, in which a large right-handed neutrino mass makes the left-handed neutrinos light. We review a special case when the Majorana masses originate from spontaneous breaking of a global U(1)XU(1) symmetry. The interactions of the right-handed with the left-handed neutrinos at the electorweak scale further break the global symmetry giving mass to one pseudo Nambu-Goldstone boson (pNGB). The pNGB can then generate a long-range force. Leptogenesis occurs through decays of heavy neutrinos into the light ones and Higgs particles. The pNGB can become the acceleron field and the neutrino masses vary with the value of the scalar field. The talk is a brief preview of the results in reference [11].
description: Invited talk presented at the Second International Conference on High Energy Physics (CICHEP II), January 14-17, 2006, Cairo, Egypt
The interstellar medium towards the Ara OB1 region
Creators: name: Henderson, Christopher D.
name: Welsh, Barry Y.
name: Hearnshaw, John B.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present high resolution (R ~ 4 km/s) absorption measurements of the interstellar NaI and CaII lines measured towards 14 early-type stars of distance 123 pc - 1650 pc, located in the direction of the Ara OB1 stellar cluster. The line profiles can broadly be split into four distinct groupings of absorption component velocity, and we have attempted to identify an origin and distance to each of these interstellar features. For gas with absorption covering the velocity range -10 km/s < V_helio < +10 km/s, we can identify the absorbing medium with local gas belonging to the Lupus-Norma interstellar cavity located between 100 and 485 pc in this galactic direction. Gas with velocities spanning the range -20 km/s < V_helio < +20 km/s is detected towards stars with distances of 570-800 pc. We identify a wide-spread interstellar feature at V_helio ~ -15 km/s with the expanding HI shell called GSH 337+00-05, which is now placed at a distance of ~530 pc.
description: 12 pages, 5 figures, accepted for publication in Astrophysics & Space Science
Phase Diagram of Chiral Biopolymer Wigner Crystals
Creators: name: Grason, Gregory M.
name: Bruinsma, Robijn F.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We study the statistical mechanics of counterion Wigner crystals associated with hexagonal bundles of chiral biopolymers. We show that, due to spontaneous chiral symmetry breaking induced by frustration, these Wigner crystals would be chiral even if the biopolymers themselves were not chiral. Using a duality transformation of the model onto a "spin-charge" Hamiltonian, we show that melting of the Wigner crystal is due to the unbinding of screw dislocations and that the melting temperature has a singular dependence on the intrinsic chirality of the biopolymers. Finally, we report that, if electrostatic interactions are strongly screened, the counterions can condense in the form of an intermediate achiral Wigner solid phase that melts by the unbinding of fractional topological charges.
description: 43 pages, 13 figures
Multi-Agent Complex Systems and Many-Body Physics
Creators: name: Johnson, Neil F.
name: Smith, David M. D.
name: Hui, Pak Ming
Publisher: name: arXiv
Year: 2006
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Multi-agent complex systems comprising populations of decision-making particles, have many potential applications across the biological, informational and social sciences. We show that the time-averaged dynamics in such systems bear a striking resemblance to conventional many-body physics. For the specific example of the Minority Game, this analogy enables us to obtain analytic expressions which are in excellent agreement with numerical simulations.
description: Accepted for publication in Europhysics Letters