cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Computational quantification of patient specific changes in ventricular dynamics associated with pulmonary hypertension - Supplementary Material
Creators: name: Finsberg, Henrik
name: Sundnes, Joakim
name: Xi, Ce
name: Lee, Lik Chuan
name: Xiaodan, Zhao
name: Tan, Ju Le
name: Genet, Martin
name: Zhong, Liang
name: Wall, Samuel T.
Publisher: name: Zenodo
Year: 2019
Subjects: Patient-Specific Cardiac Modeling
Cardiac Mechanics
Data assimilation
Pulmonary Hypertension

description: Supplementary material for journal publication - Computational quantification of patient specific changes in ventricular dynamics associated with pulmonary hypertension
title: The American Samoa Longline Limited-entry Fishery Quarterly Report 1 October–31 December 2023
Creators: name: Pacific Islands Fisheries Science Center (U.S.). Fisheries Research and Monitoring Division
Publisher: name: NOAA National Marine Fisheries Service Pacific Islands Fisheries Science Center
publisherIdentifier: https://ror.org/02apffz65
publisherIdentifierScheme: ROR
Year: 2024

description: PIFSC data report ; DR-24-24
description: Effort and catch statistics for the American Samoa longline limited-entry fishery reported by fishers on electronic and paper logs are summarized for the fourth quarter of 2023 (1 October–31 December; PIFSC, 2024).
Bulk Viscosity, Decaying Dark Matter, and the Cosmic Acceleration
Creators: name: Wilson, James R.
name: Mathews, Grant J.
name: Fuller, George M.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We discuss a cosmology in which cold dark-matter particles decay into relativistic particles. We argue that such decays could lead naturally to a bulk viscosity in the cosmic fluid. For decay lifetimes comparable to the present hubble age, this bulk viscosity enters the cosmic energy equation as an effective negative pressure. We investigate whether this negative pressure is of sufficient magnitude to account fo the observed cosmic acceleration. We show that a single decaying species in a flat, dark-matter dominated cosmology without a cosmological constant cannot reproduce the observed magnitude-redshift relation from Type Ia supernovae. However, a delayed bulk viscosity, possibly due to a cascade of decaying particles may be able to account for a significant fraction of the apparent cosmic acceleration. Possible candidate nonrelativistic particles for this scenario include sterile neutrinos or gauge-mediated decaying supersymmetric particles.
description: 7 pages, 4 figures
Proper motion, spectra, and timing of PSR J1813-1749 using Chandra and NICER
Creators: name: Ho, Wynn C. G.
name: Guillot, Sebastien
name: Parkinson, P. M. Saz
name: Limyansky, B.
name: Ng, C. -Y.
name: Bejger, Michal
name: Espinoza, Cristobal M.
name: Haskell, B.
name: Jaisawal, Gaurava K.
name: Malacaria, C.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: PSR J1813-1749 is one of the most energetic rotation-powered pulsars known, producing a pulsar wind nebula (PWN) and gamma-ray and TeV emission, but whose spin period is only measurable in X-ray. We present analysis of two Chandra datasets that are separated by more than ten years and recent NICER data. The long baseline of the Chandra data allows us to derive a pulsar proper motion mu_R.A.=-(0.067"+/-0.010") yr^-1 and mu_decl.=-(0.014"+/-0.007") yr^-1 and velocity v_perp~900-1600 km/s (assuming a distance d=3-5 kpc), although we cannot exclude a contribution to the change in measured pulsar position due to a change in brightness structure of the PWN very near the pulsar. We model the PWN and pulsar spectra using an absorbed power law and obtain best-fit absorption NH=(13.1+/-0.9)x10^22 cm^-2, photon index Gamma=1.5+/-0.1, and 0.3-10 keV luminosity Lx~5.4x10^34 erg/s (d/5 kpc)^2 for the PWN and Gamma=1.2+/-0.1 and Lx~9.3x10^33 erg/s (d/5 kpc)^2 for PSR J1813-1749. These values do not change between the 2006 and 2016 observations. We use NICER observations from 2019 to obtain a timing model of PSR J1813-1749, with spin frequency nu=22.35 Hz and spin frequency time derivative nudot=(-6.428+/-0.003)x10^-11 Hz/s. We also fit nu measurements from 2009-2012 and our 2019 value and find a long-term spin-down rate nudot=(-6.3445+/-0.0004)x10^-11 Hz/s. We speculate that the difference in spin-down rates is due to glitch activity or emission mode switching.
description: 9 pages, 5 figures; accepted for publication in MNRAS
Random field Ising model on networks with inhomogeneous connections
Creators: name: Lee, Sang Hoon
name: Jeong, Hawoong
name: Noh, Jae Dong
Publisher: name: arXiv
Year: 2006
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: We study a zero-temperature phase transition in the random field Ising model on scale-free networks with the degree exponent $γ$. Using an analytic mean-field theory, we find that the spins are always in the ordered phase for $γ<3$. On the other hand, the spins undergo a phase transition from an ordered phase to a disordered phase as the dispersion of the random fields increases for $γ> 3$. The phase transition may be either continuous or discontinuous depending on the shape of the random field distribution. We derive the condition for the nature of the phase transition. Numerical simulations are performed to confirm the results.
description: 7 pages, 7 figures
Enhancement of the superconducting critical temperature of Sr2CuO3+d up to 95K by ordering dopant atoms
Creators: name: Liu, Q. Q.
name: Yang, H.
name: Qin, X. M.
name: Yu, Y.
name: Yang, L. X.
name: Li, F. Y.
name: Yu, R. C.
name: Jin, C. Q.
name: Uchida, S.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We address the question of whether the superconducting transition temperature (Tc) of high-Tc cuprates is enhanced when randomly distributed dopant atoms form an ordered array in the charge reservoir layers. This study is possible for the Sr2CuO3+d superconductor with K2NiF4-type structure in which oxygen atoms only partially occupy the apical sites next to the CuO2 planes and act as hole-dopants. We show that remarkable Tc enhancement up to 95K in this mono CuO2 layered HTS is associated with the apical oxygen ordering, not to the hole concentration change. The result points a route toward further enhancement of Tc in cuprate superconductors.
description: 18 pages, 5 Figures
Early High-contrast Imaging Results with Keck/NIRC2-PWFS: The SR 21 Disk
Creators: name: Uyama, Taichi
name: Ren, Bin
name: Mawet, Dimitri
name: Ruane, Garreth
name: Bond, Charlotte Z.
name: Hashimoto, Jun
name: Liu, Michael C.
name: Muto, Takayuki
name: Ruffio, Jean-Baptiste
name: Wallack, Nicole
name: Baranec, Christoph
name: Bowler, Brendan P.
name: Choquet, Elodie
name: Chun, Mark
name: Delorme, Jacques-Robert
name: Fogarty, Kevin
name: Guyon, Olivier
name: Jensen-Clem, Rebecca
name: Meshkat, Tiffany
name: Ngo, Henry
name: Wang, Jason J.
name: Wang, Ji
name: Wizinowich, Peter
name: Ygouf, Marie
name: Zuckerman, Benjamin
Publisher: name: arXiv
Year: 2020
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: High-contrast imaging of exoplanets and protoplanetary disks depends on wavefront sensing and correction made by adaptive optics instruments. Classically, wavefront sensing has been conducted at optical wavelengths, which made high-contrast imaging of red targets such as M-type stars or extincted T Tauri stars challenging. Keck/NIRC2 has combined near-infrared (NIR) detector technology with the pyramid wavefront sensor (PWFS). With this new module we observed SR~21, a young star that is brighter at NIR wavelengths than at optical wavelengths. Compared with the archival data of SR~21 taken with the optical wavefront sensing we achieved $\sim$20\% better Strehl ratio in similar natural seeing conditions. Further post-processing utilizing angular differential imaging and reference-star differential imaging confirmed the spiral feature reported by the VLT/SPHERE polarimetric observation, which is the first detection of the SR~21 spiral in total intensity at $L^\prime$ band. We also compared the contrast limit of our result ($10^{-4}$ at $0\farcs4$ and $2\times10^{-5}$ at $1\farcs0$) with the archival data that were taken with optical wavefront sensing and confirmed the improvement, particularly at $\leq0\farcs5$. Our observation demonstrates that the NIR PWFS improves AO performance and will provide more opportunities for red targets in the future.
description: accepted for publication in AJ, 8 pages, 7 figures
Supplementary document for Fabrication-integrated Design for Diffractive Optical Elements - 7332280.pdf
Creators: name: Xu, Yunpeng
name: Zang, Zihan
name: Wang, Haoqiang
name: han, yanjun
name: Li, Hongtao
name: LUO, YI
name: Wang, Lai
name: Sun, Changzheng
name: Xiong, Bing
name: Hao, Zhibiao
Publisher: name: Optica Publishing Group
Year: 2025
Subjects: Uncategorized

description: Additional experiments, simulation data and explanations for methods
Excitation spectra and ground state properties of the layered spin-1/2 frustrated antiferromagnets Cs_2CuCl_4 and Cs_2CuBr_4
Creators: name: Fjaerestad, John O.
name: Zheng, Weihong
name: Singh, Rajiv R. P.
name: McKenzie, Ross H.
name: Coldea, Radu
Publisher: name: arXiv
Year: 2007
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We use series expansion methods to study ground- and excited-state properties in the helically ordered phase of spin-1/2 frustrated antiferromagnets on an anisotropic triangular lattice. We calculate the ground state energy, ordering wavevector, sublattice magnetization and one-magnon excitation spectrum for parameters relevant to Cs_2CuCl_4 and Cs_2CuBr_4. Both materials are modeled in terms of a Heisenberg model with spatially anisotropic exchange constants; for Cs_2CuCl_4 we also take into account the additional Dzyaloshinskii-Moriya (DM) interaction. We compare our results for Cs_2CuCl_4 with unpolarized neutron scattering experiments and find good agreement. In particular, the large quantum renormalizations of the one-magnon dispersion are well accounted for in our analysis, and inclusion of the DM interaction brings the theoretical predictions for the ordering wavevector and the magnon dispersion closer to the experimental results.
description: 10 pages, 8 figures
The Gestalt two-chair technique: how it relates to theory
Creators: name: Mackay, Betty Nichol
Publisher: name: University of British Columbia
Year: 2009

description: Using Q-Methodology, this study sought to find empirical support for the three stage model of the Gestalt two-chair technique and the theory underlying how and why it is effective, put forth by L. S. Greenberg (1979; 1983). A structured Q-Sort was constructed using the factors of Conflict Resolution (CR) and the Gestalt concept of Contact (C) in a 2X2 factorial design. Each factor was divided into two levels CR - Resolved/Unresolved, C - Interruption-of-contact/Contact. The factors of CR and C were expected to interact before and after successful and unsuccessful therapy for decision-making. Individuals who were Unresolved in their decision-making were expected to experience Interruption-of-contact while individuals who were Resolved from an integrated sense of self were expected to experience being in Contact. The 85 item sort was validated by experts in Gestalt theory and therapy as representing the three stage model and the theory underlying it. Eight subjects, ambivalent about remaining in their marriages, performed the Q-Sort before and after 6 sessions of therapy using the two-chair technique. Moderate support was found for the 3 stages of the model, Opposition, Merging and Integration. Some support was found for the interaction of the factors of CR and C. Significant 2-way interaction was found for 1 subject before and after therapy considered successful according to the model. Significant 2-way interactions were found after successful therapy for four subjects but not before. Significant 2-way interactions were not found for subjects after unsuccessful therapy. When therapy was successful the factors of CR and C interacted as predicted. When therapy was not successful the factors of CR and C did not interact as predicted. The factors of CR and C did not interact for individuals who were experiencing a great deal of interruption-of-contact, indicating there is a possible pre-stage to the model where CR and C are independent of each other or where other factors may be involved. This study expanded the research on the Gestalt two-chair technique in several ways. It found some empirical support for the model and the theory underlying it. It found areas were CR and C do not interact as predicted by theory. It extended the range of application of research on two-chair technique from career decision-making to divorce decision-making.
Constructing the Optimal Solutions to the Undiscounted Continuous-Time Infinite Horizon Optimization Problems
Creators: name: CAI, Dapeng
name: NITTA, Takashi Gyoshin
Publisher: name: arXiv
Year: 2008
Subjects: subject: General Finance (q-fin.GN)
subject: Optimization and Control (math.OC)
subject: FOS: Economics and business
subject: FOS: Mathematics

description: We aim to construct the optimal solutions to the undiscounted continuous-time infinite horizon optimization problems, the objective functionals of which may be unbounded. We identify the condition under which the limit of the solutions to the finite horizon problems is optimal for the infinite horizon problems under the overtaking criterion.
A comprehensive discourse analysis of a successful case of experiential systemic couples therapy
Creators: name: Newman, Jennifer Anne
Publisher: name: University of British Columbia
Year: 2009

description: This study investigated how a therapist and clients created couple change over the course of 15 sessions of Experiential Systemic Therapy (ExST) for the marital treatment of alcohol dependency. The aim of this research was to explore how change occurred during a single case of successful ExST and to refine and expand ExST theory. ExST has been shown to be an effective treatment for couple recovery from alcohol dependence yet little research has focused on how change occurs in ExST. The case selected for analysis was an exemplar of successful ExST couples therapy. The case met several criteria for success including therapist and client satisfaction with therapy, the cessation of alcoholic drinking, increased marital satisfaction at posttest and follow-up periods, and evidence of in-session couple change. Two therapy episodes containing relational novelty (couple change) were analyzed using the Comprehensive Discourse Analysis procedure. The results of this study highlighted the existence of a subtype of relational novelty called syncretic relational novelty. Syncretic change refers to the generation of intimacy by therapist and couple where initially there existed disparate beliefs and behaviour that isolated system members. The study found that the couple’s distance oriented beliefs and practices were reconciled and intimacy was enhanced through the employment of intense experiential activities and the provision of a collaborative therapeutic atmosphere. These two activities fostered increased couple intimacy by encouraging clients to engage one another through self disclosure, empathy, shared vulnerability, increased cooperation and greater personal awareness. Couple intimacy was fostered during experiential activity through a carefully paced intensification of clients’ thoughts, feelings and physical sensations. In addition, intimacy was facilitated by the therapist when she accepted clients’ experiences and adopted clients’ language styles. As well as working collaboratively, the therapist acted as a therapeutic guide interceding during harmful spousal interactions, altering the therapy agenda at client request, promoting joint decision-making and valuing marginalized client experience. Recommendations based on these findings were made for the refinement and expansion of ExST theory.
Zodiacal Light Emission in the PLANCK mission
Creators: name: Maris, M.
name: Burigana, C.
name: Fogliani, S.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The PLANCK satellite, scheduled for launch in 2007, will produce a set of all sky maps in nine frequency bands spanning from 30 GHz to 857 GHz, with an unprecedented sensitivity and resolution. Planets, minor bodies and diffuse interplanetary dust will contribute to the (sub)mm sky emission observed by PLANCK, representing a source of foreground contamination to be removed before extracting the cosmological information. The aim of this paper is to assess the expected level of contamination in the survey of the forthcoming PLANCK mission. Starting from existing far-infrared (far-IR) models of the Zodiacal Light Emission (ZLE), we present a new method to simulate the time-dependent level of contamination from ZLE at PLANCK frequencies. We studied the possibility of PLANCK to detect and separate the ZLE contribution from the other astrophysical signals. We discuss the conditions in which PLANCK will be able to increase the existing information on the ZLE and IDP physical properties.
description: Two COlumns, A&A Style, 19 pages, 12 figures, 4 tables, accepted for the pubblication in A&A - 27 Jan 2006, new version: one reference added and some typos corrected
Aging-Aware Request Scheduling for Non-Volatile Main Memory
Creators: name: Song, Shihao
name: Das, Anup
name: Mutlu, Onur
name: Kandasamy, Nagarajan
Publisher: name: arXiv
Year: 2020
Subjects: subject: Hardware Architecture (cs.AR)
subject: Emerging Technologies (cs.ET)
subject: FOS: Computer and information sciences

description: Modern computing systems are embracing non-volatile memory (NVM) to implement high-capacity and low-cost main memory. Elevated operating voltages of NVM accelerate the aging of CMOS transistors in the peripheral circuitry of each memory bank. Aggressive device scaling increases power density and temperature, which further accelerates aging, challenging the reliable operation of NVM-based main memory. We propose HEBE, an architectural technique to mitigate the circuit aging-related problems of NVM-based main memory. HEBE is built on three contributions. First, we propose a new analytical model that can dynamically track the aging in the peripheral circuitry of each memory bank based on the bank's utilization. Second, we develop an intelligent memory request scheduler that exploits this aging model at run time to de-stress the peripheral circuitry of a memory bank only when its aging exceeds a critical threshold. Third, we introduce an isolation transistor to decouple parts of a peripheral circuit operating at different voltages, allowing the decoupled logic blocks to undergo long-latency de-stress operations independently and off the critical path of memory read and write accesses, improving performance. We evaluate HEBE with workloads from the SPEC CPU2017 Benchmark suite. Our results show that HEBE significantly improves both performance and lifetime of NVM-based main memory.
description: To appear in ASP-DAC 2021
Thermal rectifying effect in two dimensional anharmonic lattices
Creators: name: Lan, Jinghua
name: Li, Baowen
Publisher: name: arXiv
Year: 2007
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: We study thermal rectifying effect in two dimensional (2D) systems consisting of the Frenkel Kontorva (FK) lattice and the Fermi-Pasta-Ulam (FPU) lattice. It is found that the rectifying effect is related to the asymmetrical interface thermal resistance. The rectifying efficiency is typically about two orders of magnitude which is large enough to be observed in experiment. The dependence of rectifying efficiency on the temperature and temperature gradient is studied. The underlying mechanism is found to be the match and mismatch of the spectra of lattice vibration in two parts.
description: 9 Revtex pages, 13 eps Figures
Evolution of the Galaxy tool ecosystem – happier developers, happier users
Creators: name: Čech, Martin
Publisher: name: F1000Research
Year: 2015

description: Galaxy uses the Tool Shed as an App Store-like platform for tool exploration and deployment with reproducible workflow sharing support. Today the Tool Shed contains more than 3000 tools from different areas of computational research and a vibrant community is updating and improving these tools.

Driven by community feedback solicited via questionnaire we identified and focused on the areas that would benefit the most from improvements:Tool testing​- we built Planemo that dramatically simplifies tool creation and testing.
 Tool discovery​- we have rewritten search from the ground up to allow Galaxy deployers to more easily identify high quality tools.
 Tool distribution -​by providing integration with Jenkins and Github we have simplified and automated the tool testing and Tool Shed publishing process.A community based commission (IUC) is maintaining a best practice guide to address the first issue and defines standards for high quality Galaxy tools.

We also present Planemo – an easy to install command-line utility that gives developers a way to bootstrap, lint, test, and explore Galaxy tools without even requiring installation and configuration of Galaxy. Planemo makes existing developers more productive, and Planemo virtual appliances are being used to introduce new SMC-Het developers to tool and workflow development – lowering the barrier to entry.

Jenkins build scripts leveraging Planemo have been developed to automate testing and deployment of tool repositories, providing vital feedback by posting results back to GitHub. The scripts can also automatically deploy tool repositories to the Tool Shed, reducing the overhead of managing large number of tools.

The video of this presentation is available on the BOSC YouTube channel: view video
Σχετικός προσανατολισμός των ηλεκτρικών διπολικών ροπών πρωτεϊνών σε πρωτεϊνικά σύμπλοκα.
Creators: name: Μαραδίδου, Στυλιανή Ιωάννη
Publisher: name: Aristotle University of Thessaloniki
Year: 2014
Subjects: Αλληλεπίδραση πρωτεϊνών
Ηλεκτρική διπολική ροπή
Μέθοδος docking
Protein interaction
Electric dipole moment
Docking method

description: Στις περισσότερες βιολογικές διεργασίες υπάρχει η ανάγκη συνεργασίας πρωτεϊνών, οι οποίες δρουν σε συνδυασμό. Τα πρωτεϊνικά σύμπλοκα μπορούν να σχηματιστούν με τη δράση μη ομοιοπολικών αλληλεπιδράσεων, συμπεριλαμβανομένων των δεσμών υδρογόνου, Van-der Waals και ηλεκτροστατικών αλληλεπιδράσεων. Στα πλαίσια της κατανόησης της αλληλεπίδρασης των πρωτεϊνών έχουν αναπτυχθεί πειραματικές τεχνικές υψηλής απόδοσης για την ανίχνευση του σχετικού προσανατολισμού των πρωτεϊνών που αλληλεπιδρούν. Την αδυναμία των πειραματικών τεχνικών να ορίσουν το πώς οι πρωτεΐνες αλληλεπιδρούν έρχονται να καλύψουν οι επιστήμονες με την ανάπτυξη υπολογιστικών μεθόδων ικανών να προβλέψουν με αυτόματο τρόπο την τριδιάστατη δομή των πρωτεϊνικών συμπλόκων, όπως το docking πρωτεϊνών. Στόχος μας ήταν να μελετηθεί ο σχετικός προσανατολισμός των ηλεκτρικών διπολικών ροπών των πρωτεϊνών σε πρωτεϊνικά σύμπλοκα. Μια παράμετρος που θα μπορούσε να χρησιμοποιηθεί στο docking πρωτεϊνών για να αναδείξει τις περισσότερο πιθανές αλληλεπιδράσεις. Στο πλαίσιο αυτής της μελέτης προέκυψαν κατανομές πιθανοτήτων των γωνιών που σχηματίζουν οι ηλεκτρικές διπολικές ροπές των πρωτεϊνών στα σύμπλοκα που μπορούν να χρησιμοποιηθούν για την βελτίωση των αποτελεσμάτων που παίρνουμε από το docking πρωτεϊνών.
description: In most biological processes there is a need for cooperation of proteins, which act in tandem. Protein complexes can be formed by a variety of non -covalent interactions, including hydrogen bonds, Van-der Waals and electrostatic interactions. In order to understand the interaction of proteins experimental techniques of high efficiency have been developed for the detection of interacting proteins. Scientists trying to surpass the inability of the experimental techniques to define the relative orientation of interacting proteins develop computational methods capable to provide automatically the three-dimensional structure of protein complexes, such as protein docking. Our goal was to study the relative orientation of the electric dipole moments of proteins in protein complexes. This is a parameter that could be used in protein docking to identify the probable protein orientations. The result of this study is to obtain probability distributions of the angle between the electric dipole moments of proteins in the complexes. These probability distributions can be then used to improve the results obtained from protein docking.
WASP-1b and WASP-2b: Two new transiting exoplanets detected with SuperWASP and SOPHIE
Creators: name: Cameron, A. Collier
name: Bouchy, F.
name: Hebrard, G.
name: Maxted, P.
name: Pollacco, D.
name: Pont, F.
name: Skillen, I.
name: Smalley, B.
name: Street, R. A.
name: West, R. G.
name: Wilson, D. M.
name: Aigrain, S.
name: Christian, D. J.
name: Clarkson, W. I.
name: Enoch, B.
name: Evans, A.
name: Fitzsimmons, A.
name: Fleenor, M.
name: Gillon, M.
name: Haswell, C. A.
name: Hebb, L.
name: Hellier, C.
name: Hodgkin, S. T.
name: Horne, K.
name: Irwin, J.
name: Kane, S. R.
name: Keenan, F. P.
name: Loeillet, B.
name: Lister, T. A.
name: Mayor, M.
name: Moutou, C.
name: Norton, A. J.
name: Osborne, J.
name: Parley, N.
name: Queloz, D.
name: Ryans, R.
name: Triaud, A. H. M. J.
name: Udry, S.
name: Wheatley, P. J.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We have detected low-amplitude radial-velocity variations in two stars, USNO-B1.0 1219-0005465 (GSC 02265-00107 = WASP-1) and USNO-B1.0 0964-0543604 (GSC 00522-01199 = WASP-2). Both stars were identified as being likely host stars of transiting exoplanets in the 2004 SuperWASP wide-field transit survey. Using the newly-commissioned radial-velocity spectrograph SOPHIE at the Observatoire de Haute-Provence, we found that both objects exhibit reflex orbital radial-velocity variations with amplitudes characteristic of planetary-mass companions and in-phase with the photometric orbits. Line-bisector studies rule out faint blended binaries as the cause of either the radial-velocity variations or the transits. We perform preliminary spectral analyses of the host stars, which together with their radial-velocity variations and fits to the transit light curves, yield estimates of the planetary masses and radii. WASP-1b and WASP-2b have orbital periods of 2.52 and 2.15 days respectively. Given mass estimates for their F7V and K1V primaries we derive planet masses 0.80 to 0.98 and 0.81 to 0.95 times that of Jupiter respectively. WASP-1b appears to have an inflated radius of at least 1.33 R_Jup, whereas WASP-2b has a radius in the range 0.65 to 1.26 R_Jup.
description: 7 pages, 3 figures, MNRAS (accepted); new Table 1 added to summarise results for all stars surveyed; new plots of unphased RV curves added; text updated in response to referee's comments
Two Nested Shells around the Blue Supergiant ALS 19653
Creators: name: Drudis, Josep M.
name: Gvaramadze, Vasilii. V.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present the results of deep narrowband imaging of two nested shells around the blue supergiant ALS 19653,which confirm that the outer shell is physically associated with the star.
MPEC 2024-C97 : 2022 CY
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2024
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
ERG - 2F Where in the World are Canadian Oil and Gas Companies? 2017
Creators: name: Larson, Braeden
Publisher: name: The School of Public Policy Publications
Year: 2019

description: Studying the year-over-year global presence of Canadian oil and gas companies in 218 countries provides a comprehensive picture of industry trends and patterns of exploration, production and services abroad. The Where in the World (WIW) project began tracking these trends in 2011. This paper examines data collected in 2017, which reveals a reduction in the level of Canadian companies’ activities overseas between 2015 and 2017. In 2017, 118 Canadian oil and gas companies operated in 73 countries worldwide. 2017 highlighted the broad decline of Canadian oil and gas companies’ activities, in terms of the total number of Canadian companies operating internationally, the number of countries that the companies are active in, and the total Canadian produced levels of oil, natural gas liquids (NGL) and natural gas. There were 79 Canadian exploration and production (E&P) companies that were actively engaged in operations in 55 countries in 2017. This was a decrease of 29 companies and 22 countries from the 2015 Where in the World study. Canadian E&P companies produced a total of 721,488 barrels of oil equivalent a day (boe/d) of oil, NGL and natural gas in 30 of the 55 countries where Canadian activity occurred, a decrease of 36 per cent in comparison to 2015. In total, Canadian international production of hydrocarbons in 2017 was 0.497 per cent of the total production of international hydrocarbons. North America continues to be the primary destination for both Canadian E&P and service companies’ international activities and operations. Of the 118 Canadian oil and gas companies that operated internationally, 67 operated in the United States. In 2017, 39 service companies spread their expertise and technology to a total of 43 countries, 11 fewer countries than in 2015, and three fewer in comparison to 2011, the year the Where in the World study began. It is noteworthy to highlight that the major reduction in the presence of service companies occurred in Africa, which accounted for approximately 21 per cent of this decrease. Nine of the 11 countries, or 82 per cent of the countries, where service companies no longer operate were located in Africa. Overall, 2017 will be distinguished for the notable and continued decrease of Canadian oil and gas companies compared to 2011, when 255 companies were active in 106 countries, and 2015, when 161 companies were active in 96 countries.
description: The School of Public Policy Publications, Vol 12 (2019)
Υποστήριξη εργαστηρίου συντήρησης σε ελέγχους αυθεντικότητας ζωγραφικών έργων, με δημιουργία βάσης αναλυτικών δεδομένων φασματοσκοπίας Raman
Creators: name: Καρατζιά, Αικατερίνη Σταύρου
Publisher: name: Aristotle University of Thessaloniki
Year: 2014
Subjects: Φασματοσκοπία Raman
ακρυλικά
FTIR
Raman Spectroscopy
acrylics
authentication

description: To αντικείμενο της διπλωματικής εργασίας αφορά τη δημιουργία βιβλιοθήκης αναφοράς φασμάτων Raman μοντέρνων χρωστικών, με σκοπό την χρήση τους σε ελέγχους αυθεντικότητας έργων τέχνης. Η εργασία εκπονήθηκε στα πλαίσια μιας έρευνας του τμήματος συντήρησης του University of Applied Sciences of Cologne, με θέμα το μεγάλο πρόβλημα των κυκλωμάτων πλαστών έργων τέχνης, οι οποίες μαστίζουν την Γερμανία και πιο συγκεκριμένα το κρατίδιο της Ρηνανίας-Βεστφαλίας (Nordrhein-Westfalen). Σε πρώτη φάση δημιουργήθηκαν πρότυπα ακρυλικά δείγματα λευκών χρωστικών με ακρυλικό συνδετικό μέσο. Η παρασκευή τους έγινε παραδοσιακά στο εργαστήριο και δεν χρησιμοποιήθηκαν χρώματα τα οποία διατίθενται εμπορικά μίγματα χρωστικών με αποτέλεσμα την δημιουργία μεγάλου αριθμού πρότυπων ακρυλικών δειγμάτων. Στην συνέχεια αναλύθηκαν με φασματοφωτόμετρο Brüker Raman, προς δημιουργία βάσης δεδομένων. Έπειτα ελήφθησαν δείγματα από δύο ζωγραφικά έργα, δύο Γερμανών καλλιτεχνών του 20ου αιώνα, τα οποία ήταν ύποπτα πως είναι πλαστά. Με την χρήση της βάσης δεδομένων αλλά και τη συμπληρωματική βοήθεια φασματοσκοπίας FTIR πραγματοποιήθηκε ο έλεγχος αυθεντικότητας των δύο έργων και ελέγχθηκε η ποιότητα της βάσης δεδομένων η οποία δημιουργήθηκε. Επιβεβαιώθηκε επίσης, ότι τα δύο έργα που μελετήθηκαν ήταν πράγματι πλαστά.
description: The subject of this thesis concerns the creation of an analytical Raman spectroscopy reference library of modern paints, in order to be applied in authentication of works of art. The research was transacted as a part of a project of the Conservation Department in University of Applied Sciences of Cologne, concerning the large amount of fake works of art that exist in Germany and especially, in West Germany, in Nordrhein-Westfalen. Initially, standards of white paints with acrylic binding medium were created. The preparation of those samples was traditionally made, with no use of commercial paints. A wide variety of fillers were chosen and used combined with the pigments. Also mixtures of pigments in several proportions were prepared. As a result, large number of standards was made and analyzed by a Brüker Raman spectrometer in order for the database to be created. Then, white samples of two works of arts were collected. The paintings are attributed to two German Expressionists, Johannes Mohlzahn and Heinrich Nauen. Finally, the authentication was achieved when the samples were analyzed with both Raman and FTIR spectroscopy in order to have more valid results.
Solitons and exact velocity quantization of incommensurate sliders
Creators: name: Manini, Nicola
name: Cesaratto, Marco
name: Santoro, Giuseppe E.
name: Tosatti, Erio
name: Vanossi, Andrea
Publisher: name: arXiv
Year: 2006
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We analyze in some detail the recently discovered velocity quantization phenomena in the classical motion of an idealized one-dimensional solid lubricant, consisting of a harmonic chain interposed between two periodic sliders. The ratio w = v_cm/v_ext of the chain center-of-mass velocity to the externally imposed relative velocity of the sliders is pinned to exact ``plateau'' values for wide ranges of parameters, such as sliders corrugation amplitudes, external velocity, chain stiffness and dissipation, and is strictly determined by the commensurability ratios alone. The phenomenon is caused by one slider rigidly dragging the density solitons (kinks/antikinks) that the chain forms with the other slider. Possible consequences of these results for some real systems are discussed.
description: 12 pages 6 figures. Small fixup after Referee's comments. In print in J. Phys.: Condens. Matter
Limit to manipulation of qubits due to spontaneous symmetry breaking
Creators: name: van Wezel, Jasper
name: Brink, Jeroen van den
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We consider a two-spin qubit that is subject to the orderparameter field of a symmetry broken manipulation device. It is shown that the thin spectrum of the manipulation device limits the coherence of the qubit.
description: 2 pages, proceedings, to appear in JMMM
Ionization effect in the Earth's atmosphere during the sequence of October-November 2003 Halloween GLE events
Creators: name: Mishev, A.
name: Velinov, P. I. Y.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Space Physics (physics.space-ph)
subject: Atmospheric and Oceanic Physics (physics.ao-ph)
subject: FOS: Physical sciences

description: The effect of precipitating high-energy particles on atmospheric physics and chemistry is extensively studied over the last decade. In majority of the existing models, the precipitating particles induced ionization plays an essential role. For such effects, it is necessary to possess enhanced increase in ion production, specifically during the winter period. In this study, we focus on highly penetrating particles - cosmic rays. The galactic cosmic rays are the main source of ionization in the Earth's stratosphere and troposphere. On the other hand, the atmospheric ionization may be significantly enhanced during strong solar energetic particle events, mainly over the polar caps. A specific interest is paid to the most energetic solar proton events leading to counting rate enhancement of ground-based detectors, namely the so-called ground level enhancements (GLEs). During solar cycle 23, several strong ground level enhancements were observed. A sequence of three GLEs was observed in October-November 2003, the Halloween events. Here, on the basis of 3-D Monte Carlo model, we computed the energetic particles induced atmospheric ionization, explicitly considering the contribution of cosmic rays with galactic and solar origin. The ion production rates were computed as a function of the altitude above sea level using reconstructed solar energetic particles spectra. The 24 hours and event averaged ionization effects relative to the average due to galactic cosmic rays were also computed.
description: 21 pages, 11 figures
Ταφονομία κεραμικής: το παράδειγμα του νεολιθικού οικισμού του Μακρυγιάλου Ι:
Creators: name: Μπορμπουδάκη, Κυριακή Ανδρέα
Publisher: name: Aristotle University of Thessaloniki
Year: 2014
Subjects: ταφονομία κεραμικής
απόρριψη/ δομημένη απόθεση
Μακρύγιαλος
pottery's taphonomy
Makrygialos
practices of discharging/ structured deposit

description: Αντικείμενο της εργασίας είναι η ταφονομία της κεραμικής και η μελέτη των ταφονομικών χαρακτηριστικών της κεραμικής του Μακρυγιάλου Ι, και η διερεύνηση πρακτικών απόρριψης/εναπόθεσης. Αναλύονται η φθορά, το μέγεθος και τα συνανήκοντα όστρακα, σε σχέση την ποσοτική κατανομή των οστράκων, το αρχικό σχήμα των αγγείων και τις κατηγορίες της κεραμικής και του σχήματος (ανοικτό ή κλειστό).
description: The object of the study is the taphonomy of pottery and the study of the taphonomic characteristics of the pottery in Makriagialos I, and further in the research of the practices of rejection or the structural deposits. We have analyzed the wear of the sherds, their size and the belonged sherds, compared to the quantitative distribution of the sherds, the original shape of the vessels and the categories of pottery and the open or closed shape of the vessels.
Local Strict Comparison Theorem and Converse Comparison Theorems for Reflected Backward Stochastic Differential Equations
Creators: name: Li, Juan
name: Tang, Shanjian
Publisher: name: arXiv
Year: 2007
Subjects: subject: Probability (math.PR)
subject: Symplectic Geometry (math.SG)
subject: FOS: Mathematics
subject: 60H10, 60H30

description: A local strict comparison theorem and some converse comparison theorems are proved for reflected backward stochastic differential equations under suitable conditions.
title: The big-fish-little-pond effect on the four facets of academic self-concept
Creators: name: Hoferichter, Frances
name: Laetsch, Alexander
name: Lazarides, Rebecca
name: Raufelder, Diana
Publisher: name: Universität Potsdam
Year: 2019

description: The social context plays a decisive role in the formation of the academic self-concept (ASC) and has been widely studied as the big-fish-little-pond-effect (BFLPE). This effect describes that comparable talented students in high-achieving school settings have a lower ASC compared to equally talented students attending low-achieving settings. Past research has focused on students' domain-specific ASC, while little is known about the relation of achievement-related classroom compositions and the various facets of ASC. Additionally, BFLPE-research has been critiqued to build its theoretical frame on social comparison theory, without providing sufficient empirical support. To address this gap, we analyzed how the single student's social, criterial, absolute, and individual ASC relate to class-level achievement of 8th graders. Applying Multilevel Structural Equation Modeling (MLSEM) we found that all facets of ASC were significantly related to average-class achievement, while student's social ASC revealed the strongest associated. The results reveal explicitly that average-class achievement is strongly related to social comparison processes.
description: Postprints der Universität Potsdam : Humanwissenschaftliche Reihe, 554
Degenerate four-wave mixing as a low-power source of squeezed light
Creators: name: Schmittberger, Bonnie L.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Squeezed light is a quantum resource that can improve the sensitivity of optical measurements. However, existing sources of squeezed light generally require high powers and are not amenable to portability. Here we theoretically investigate an alternative technique for generating squeezing using degenerate four-wave-mixing in atomic vapors. We show that by minimizing excess noise, this technique has the potential to generate measurable squeezing with low powers attainable by a small diode laser. We suggest experimental techniques to reduce excess noise and employ this alternative nonlinear optical process to build a compact, low-power source of squeezed light.
Εφαρμογή σύγχρονων γεωφυσικών μεθόδων στη μελέτη του μηχανισμού λειτουργίας των πηγών Αραβησσού:
Creators: name: Αποστολίδου, Αικατερίνη Χαράλαμπους
Publisher: name: Aristotle University of Thessaloniki
Year: 2014
Subjects: γεωφυσική
ηλεκτρική αντίσταση
ρήγμα
geophysics
electrical resistivity
fault

description: Στην παρούσα διατριβή ειδίκευσης πραγματεύεται η εφαρμογή σύγχρονων γεωφυσικών μεθόδων στην περιοχή των πηγών της Αραβησσού με σκοπό να επικαιροποιηθούν τα δεδομένα μίας προγενέστερης έρευνας στην ίδια περιοχή μελέτης και να επαναξιολογηθούν με σύγχρονες μεθόδους ερμηνείας και επεξεργασίας που έγιναν δυνατές με την ανάπτυξη των υπολογιστικών συστημάτων και των αντίστοιχων λογισμικών . Για τον σκοπό αυτό χρησιμοποιήθηκαν αφ’ ενός τα στοιχεία της υδρογεωλογικής μελέτης που πραγματοποιήθηκε για λογαριασμό του Οργανισμού Υδρεύσεως Θεσσαλονίκης και έλαβε χώρα το 1970 και αφ΄ ετέρου τα νέα στοιχεία που προέκυψαν. Για τις νέες μετρήσεις οι γεωφυσικοί μέθοδοι που χρησιμοποιήθηκαν είναι αυτή της ειδικής ηλεκτρικής αντίστασης, καθώς και η ηλεκτρομαγνητική μέθοδος VLF. Από τα αποτελέσματα της έρευνας διαπιστώθηκε η πραγματική θέση των ρηγμάτων στην περιοχή καθώς και η θέση νέων ρηγμάτων όπως προέκυψαν από τις μετρήσεις.
description: At the present thesis, current geophysical methods are used in the area of Aravissos springs in order to update the data of a previous research in the same study area and correct observations due to τthe improvement of geophysical software. For this purpose, there were used data and results from a hydrogeological study conducted on behalf of the Water Supply Organization of Thessaloniki and took place in 1970 and new data that collected for the present study. For the new measurements, the geophysical methods that used are the method of electrical resistivity tomography and the electromagnetic method VLF. The results of the investigation indicated the actual location of the faults in the area and the location of new faults as they are obtained from the measurements interpretation.
General construction of noiseless networks detecting entanglement with help of linear maps
Creators: name: Horodecki, P.
name: Augusiak, R.
name: Demianowicz, M.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We present the general scheme for construction of noiseless networks detecting entanglement with the help of linear, hermiticity-preserving maps. We show how to apply the method to detect entanglement of unknown state without its prior reconstruction. In particular, we prove there always exists noiseless network detecting entanglement with the help of positive, but not completely positive maps. Then the generalization of the method to the case of entanglement detection with arbitrary, not necessarily hermiticity-preserving, linear contractions on product states is presented.
description: Revtex, 6 pages, 3 figures, published version
SPInS, a pipeline for massive stellar parameter inference: A public Python tool to age-date, weigh, size up stars, and more
Creators: name: Lebreton, Yveline
name: Reese, Daniel Roy
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Stellar parameters are required in a variety of contexts, ranging from the characterisation of exoplanets to Galactic archaeology. Among them, the age of stars cannot be directly measured, while the mass and radius can be measured in some particular cases (binary systems, interferometry). Stellar ages, masses, and radii have to be inferred from stellar evolution models by appropriate techniques. We have designed a Python tool named SPInS. It takes a set of photometric, spectroscopic, interferometric, and/or asteroseismic observational constraints and, relying on a stellar model grid, provides the age, mass, and radius of a star, among others, as well as error bars and correlations. We make the tool available to the community via a dedicated website. SPInS uses a Bayesian approach to find the PDF of stellar parameters from a set of classical constraints. At the heart of the code is a MCMC solver coupled with interpolation within a pre-computed stellar model grid. Priors can be considered, such as the IMF or SFR. SPInS can characterise single stars or coeval stars, such as members of binary systems or of stellar clusters. We illustrate the capabilities of SPInS by studying stars that are spread over the Hertzsprung-Russell diagram. We then validate the tool by inferring the ages and masses of stars in several catalogues and by comparing them with literature results. We show that in addition to the age and mass, SPInS can efficiently provide derived quantities, such as the radius, surface gravity, and seismic indices. We demonstrate that SPInS can age-date and characterise coeval stars that share a common age and chemical composition. The SPInS tool will be very helpful in preparing and interpreting the results of large-scale surveys, such as the wealth of data expected or already provided by space missions, such as Gaia, Kepler, TESS, and PLATO.
description: 16 pages, 11 figures, accepted for publication in A&A