cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Monograph use at an academic health sciences library: The first three years of shelf life
Creators: name: DD Blecic
Publisher: name: University of Illinois at Chicago
Year: 2021
Subjects: subject: Library and Information Studies
subject: FOS: Media and communications

description: Objective: To study the circulation of monographs during the first three years of shelf life at an academic health sciences library. Method: A record was kept of monographs added to the circulating collection from mid-1994 to mid-1995. After three years, each monograph was located and the number of times it circulated during the first, second, and third year of shelf life determined by counting checkout stamps on the circulation slip. Results: Of the 1,958 monographs studied, 1,674 had complete data for the first three years of shelf life. Of those 1,674 titles, 81.48% circulated at least once. A total of 7,659 circulations were recorded; 38.69% occurred in the first year of shelf life, 32.37% in the second year, and 28.95% in the third year. The data did not fit the well-known 80/20 rule. Instead, approximately 38% of monographs accounted for 80% of circulation. A small percentage, 2.21%, of monographs accounted for a substantial percentage of circulation, 21.84%. Conclusions: A large percentage of the monographs circulated and use did not decline sharply with age within the first three years of shelf life, indicating a high demand for monographs at this academic health sciences library. These results, combined with the findings of earlier studies, suggested two possibilities. First, academic health sciences libraries might exhibit use of a higher percentage of monograph acquisitions than other types of libraries; or, second, a low monograph-to-user ratio might result in a higher percentage of monographs being used. Perhaps both factors contributed to the results found in this study. Further investigation would be needed to determine the extent to which library type and monograph-to-user ratio influenced monograph use.
Χρηματοοικονομική ανάλυση του τραπεζικού κινδύνου των μελών της
Creators: name: Φεύγα, Βασιλική Θωμά
Publisher: name: Aristotle University of Thessaloniki
Year: 2017
Subjects: Πιθανότητα Πτώχευσης
Εξαρτημένη μεταβλητή
Ανεξάρτητες μεταβλητές
BRICS (Brazil, Russia, India, China, South Africa)
Ζ-score
Stata

description: Η εργασία αυτή προσπαθεί να επισημάνει τις κυρίαρχες τάσεις που παρατηρούνται και ερμηνεύουν την ένωση BRICS (Βραζιλία, Ρωσία, Ινδία, Κίνα, Νότια Αφρική), από την δημιουργία της μέχρι την ίδρυση την Νέας Αναπτυξιακής της Τράπεζας. Η μελέτη η οποία πραγματοποιήθηκε στο εμπειρικό κομμάτι, βασίζεται σε στοιχεία που δημοσεύονται στην Παγκόσμια Τράπεζα Στατιστικών( Word Bank Statistics) και διεθνούς Οργανισμούς, δεδομένα τα οποία με την κατάλληλη επεξεργασία και χρήση του προγράμματος stata, επέτρεψαν να εξετάσουμε το τραπεζικό σύστημα των κρατών μελών της Ένωσης ως προς τον τραπεζικό κίνδυνο , για τα έτη 2004-2014, με την χρήση του Z-Score, καθοριστικός παράγοντας της ανάληψης κινδύνου για το οριζόμενο χρονικό διάστημα
description: This paper seeks to identify the dominant trends of the union BRICS (Brazil, Russia, India, China, South Africa), from the creation until the establishment of the New Development Bank. The study carried out in an empirical part based on data that can be found on the World Bank Statistics and international organizations, data which with the appropriate processing and use of stata program , let us determine banking system of Member States of Union by the view of bank risk, for the years 2004-2014, using the Z-Score for the specified period
Six-qubit permutation-based decoherence-free orthogonal basis
Creators: name: Cabello, Adan
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: There is a natural orthogonal basis of the 6-qubit decoherence-free (DF) space robust against collective noise. Interestingly, most of the basis states can be obtained from one another just permuting qubits. This property: (a) is useful for encoding qubits in DF subspaces, (b) allows the implementation of the Bennett-Brassard 1984 (BB84) protocol in DF subspaces just permuting qubits, which completes a the method for quantum key distribution using DF states proposed by Boileau et al. [Phys. Rev. Lett. 92, 017901 (2004)], and (c) points out that there is only one 6-qubit DF state which is essentially new (not obtained by permutations) and therefore constitutes an interesting experimental challenge.
description: REVTeX4, 5 pages
A Direct Measurement of the Dust Extinction Curve in an Intermediate-Redshift Galaxy
Creators: name: Heng, Kevin
name: Lazzati, Davide
name: Perna, Rosalba
name: Garnavich, Peter
name: Noriega-Crespo, Alberto
name: Bersier, David
name: Matheson, Thomas
name: Pahre, Michael
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present a proof-of-concept study that dust extinction curves can be extracted from the infrared (IR), optical, ultraviolet (UV) and X-ray afterglow observations of GRBs without assuming known extinction laws. We focus on GRB 050525A (z = 0.606), for which we also present IR observations from the Spitzer Space Telescope at about 2.3 days post-burst. We construct the spectral energy distribution (SED) of the afterglow and use it to derive the dust extinction curve of the host galaxy in 7 optical/UV wavebands. By comparing our derived extinction curve to known templates, we see that the Galactic or Milky Way extinction laws are disfavored versus the Small and Large Magellanic Cloud (SMC and LMC) ones, but that we cannot rule out the presence of a LMC-like 2175 angstrom bump in our extinction curve. The dust-to-gas ratio present within the host galaxy of GRB 050525A is similar to that found in the LMC, while about 10 to 40% more dust is required if the SMC template is assumed. Our method is useful to observatories that are capable of simultaneously observing GRB afterglows in multiple wavebands from the IR to the X-ray.
description: 9 pages, 5 figures. Accepted by ApJ. Minor changes to 2nd Paragraph of Introduction
Report on the Twelfth United Nations/European Space Agency Workshop on Basic Space Science
Creators: name: Wamsteker, W.
name: Haubold, H. J.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Physics and Society (physics.soc-ph)
subject: FOS: Physical sciences

description: Pursuant to recommendations of the United Nations Conference on the Exploration and Peaceful Uses of Outer Space (UNISPACE III) and deliberations of the United Nations Committee on the Peaceful Uses of Outer Space (UNCOPUOS), annual UN/European Space Agency workshops on basic space science have been held around the world since 1991. These workshops contributed to the development of astrophysics and space science, particularly in developing nations. Following a process of prioritization, the workshops identified the following elements as particularly important for international cooperation in the field: (i) operation of astronomical telescope facilities implementing TRIPOD, (ii) virtual observatories, (iii) astrophysical data systems, (iv) concurrent design capabilities for the development of international space missions, and (v) theoretical astrophysics such as applications of nonextensive statistical mechanics. Beginning in 2005, the workshops focus on preparations for the International Heliophysical Year 2007 (IHY2007). The workshops continue to facilitate the establishment of astronomical telescope facilities as pursued by Japan and the development of low-cost, ground-based, world-wide instrument arrays as lead by the IHY secretariat.
description: PDF, 9 pages
Additional file 2 of Associations between academic burnout, resilience and life satisfaction among medical students: a three-wave longitudinal study
Creators: name: Wang, Qinghua
name: Sun, Wei
name: Wu, Huazhang
Publisher: name: figshare
Year: 2022
Subjects: Medicine
Biological Sciences not elsewhere classified
Science Policy

description: Additional file 2. Differences in medical students' academic burnout, resilience and life satisfaction regarding gender for each wave.
Fabrication of astronomical x-ray reflection gratings using thermally activated selective topography equilibration
Creators: name: McCoy, Jake A.
name: McEntaffer, Randall L.
name: Eichfeld, Chad M.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Thermally activated selective topography equilibration (TASTE) enables the creation of 3D structures in resist using grayscale electron-beam lithography followed by a thermal treatment to induce a selective polymer reflow. A blazed grating topography can be created by reflowing repeating staircase patterns in resist into wedge-like structures. Motivated by astronomical applications, such patterns with periodicities 840 nm and 400 nm have been fabricated in 130 nm-thick PMMA using TASTE to provide a base for X-ray reflection gratings. A path forward to integrate this alternative blazing technique into grating fabrication recipes is discussed.
description: 21 pages, 8 figures, from a special edition of JVST B for the 62nd International Conference on Electron, Ion, and Photon Beam Technology and Nanofabrication (EIPBN)
Angular Signatures of Dark Matter in the Diffuse Gamma Ray Background
Creators: name: Hooper, Dan
name: Serpico, Pasquale D.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Dark matter annihilating in our Galaxy's halo and elsewhere in the universe is expected to generate a diffuse flux of gamma rays, potentially observable with next generation satellite-based experiments, such as GLAST. In this article, we study the signatures of dark matter in the angular distribution of this radiation, in particular the deterministic ones. Pertaining to the extragalactic contribution, we discuss the effect of the motion of the solar system with respect to the cosmological rest frame, and anisotropies due to the structure of our local universe. For the gamma ray flux from dark matter in our own Galactic halo, we discuss the effects of the offset position of the solar system, the Compton-Getting effect, the asphericity of the Milky Way halo, and the signatures of nearby substructure. We explore the prospects for the detection of these features by the GLAST satellite and find that, if ~10% or more of the diffuse gamma ray background observed by EGRET is the result of dark matter annihilations, then GLAST should be sensitive to anisotropies at the sub-percent level. Such precision would be sufficient to detect many, if not all, of the signatures discussed in this paper.
description: 13 pages, 5 figures; minor adjustments, clarifications added, conclusions unchanged; matches published version
Passive Optical Phase Stabilization on a Ring Fiber Network
Creators: name: Hu, Liang
name: Tian, Xueyang
name: Wang, Long
name: Wu, Guiling
name: Chen, Jianping
Publisher: name: arXiv
Year: 2021
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Optical frequency transfer provides the means for high-fidelity frequency transfer across thousands of kilometers. A critical step in the further developing optical frequency transfer is its capability to transfer a high spectral purity feature from ultrastable lasers or optical clocks to any remote locations and, at the same time, its adaptability to incorporate the optical frequency transfer technique into any existing communication networks with different topologies. Here we for the first time report a technique that delivers optical-frequency signals to multiple independent remote hubs along a ring optical-fiber network with passive phase stabilization. The technique automatically corrects optical-fiber length fluctuations of arbitrary hubs along the loop by mixing and shifting optical signals. Without the help of an active phase tracker and a compensator, it could significantly mitigate some technical problems such as the limited compensation speed and phase recovery time, the phase jitter contamination caused by the servo bump in conventional phase noise cancellation. Moreover, by transmitting optical signals along both directions using the same optical source, it can improve the signal-to-noise ratio at each hub. This technique maintains the same delay-limited phase noise correction capability as in conventional techniques and, furthermore, improves the phase jitter by a factor of 3, opening a way to a broad distribution of an ultrastable frequency reference with high spectral purity and enabling a wide range of applications beyond metrology over a ring fiber network with the naturally impressive reliability and scalability.
description: 9 pages, 6 figures
On the electrodisintegration of the deuteron in the Bethe-Salpeter formalism
Creators: name: Bondarenko, S. G.
name: Burov, V. V.
name: Goy, A. A.
name: Rogochaya, E. P.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The (ed -> enp) process in the frame of the Bethe-Salpeter approach with a separable kernel of the Nucleon-Nucleon (NN) interaction was considered. This conception keeps the covariance of description of the process. Special attention was devoted to a contribution of the D-states of the deuteron in the cross section of the electrodisintegration. It was shown that the spectator particle (neutron) plays an important role. The factorization of a cross section of this reaction in the impulse approximation was checked by analytical and numerical calculations.
description: 15 pages, 11 figures, 1 table
Διαχειριση Και Ομαδοποιηση Πελατων Με Χρηση Crm Συστηματων
Creators: name: Τζίμας, Ραφαήλ Μαργαρίτη
Publisher: name: Aristotle University of Thessaloniki
Year: 2017
Subjects: Διαχείριση Πελατών
Αγορά
Μηχανική Μάθηση
Crm
R
Cluster

description: Αντικείμενο της παρούσας εργασίας είναι η ανάλυση και επεξεργασία πραγματικών δεδομένων από εμπορικό κατάστημα και η χρήση τεχνικών CRM που σκοπό έχουν την εύρεση νέων πελατών και τη διατήρηση των υπαρχόντων. Στην παρούσα εργασία η γλώσσα R είναι το βασικό εργαλείο για την ομαδοποίηση των πελατών βάσει των συνηθειών που έχουν και το μέσο για την οπτικοποίηση των αποτελεσμάτων. Γίνεται αναλυτική μελέτη των συστημάτων διαχείρισης πελατών σε θεωρητικό επίπεδο αλλά και στην πράξη. Παρουσιάζονται εφαρμογές μεγάλων εταιριών που χρησιμοποιούν τέτοια συστήματα. Η μελέτη ολοκληρώνεται με τα χρήσιμα συμπεράσματα από την ανάλυση των δεδομένων και τον σχολιασμό αυτών με στόχο την εξαγωγή γνώσης
description: The subject of this work is the analysis and processing of real business data and the use of CRM techniques aiming at finding new clients and keeping existing ones. The R language is the main tool for our customer segmentation process. The analytical study of customer management systems on a theoretical level but also on practice. Here are presented applications of big companies which are using such systems. The study is concluded with the useful conclusions from the data analysis and annotation of these in order to export knowledge
Sub-ballistic behaviour of the Quantum Kicked Rotor
Creators: name: Romanelli, A.
name: Auyuanet, A.
name: Siri, R.
name: Micenmacher, V.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We study the resonances of the quantum kicked rotor subjected to an excitation that follows an aperiodic Fibonacci prescription. In such a case the secondary resonances show a sub-ballistic behaviour like the quantum walk with the same aperiodic prescription for the coin. The principal resonances maintain the well-known ballistic behaviour. Then the parallelism previusly established between the kicked rotor and the generalized quantum walk is retained only with the secondary resonances.
description: 9 pages, 3 figures, to appear in Phys. Lett. A
"Facile gates:" walls and identity across Paradise Lost and along the U.S.-Mexico border
Creators: name: Bartlett, Sydney Marjorie
name: 0000-0002-0180-1032
Publisher: name: The University of Texas at Austin
Year: 2020
Subjects: Paradise Lost
Walls
Migration
Borders
United States

description: This report compares the respective functions of the U.S.-Mexico border wall and borders within Paradise Lost. Supposed threats to economic, physical, and cultural property encourage modern nation states to continue constructing territorial borders despite a growing body of work that contests the efficacy of walls in deterring unauthorized migration. More effective are the symbolic capacities of walls and their ability to articulate the people and cultures they enclose. In Milton’s epic and on the U.S. Southwest border, walls are more effective symbols than they are restrictive bodies.
On spin evolution in a time-dependent magnetic field: post-adiabatic corrections and geometric phases
Creators: name: Bliokh, K. Yu.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Physics (quant-ph)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We examine both quantum and classical versions of the problem of spin evolution in a slowly varying magnetic field. Main attention is given to the first- and second-order adiabatic corrections in the case of in-plane variations of the magnetic field. While the first-order correction relates to the adiabatic Berry phase and Coriolis-type lateral deflection of the spin, the second-order correction is shown to be responsible for the next-order geometric phase and in-plain deflection. A comparison between different approaches, including the exact (non-adiabatic) geometric phase, is presented.
description: 10 pages, 1 figure, to appear in Phys. Lett. A
Additional file 3 of Associations between academic burnout, resilience and life satisfaction among medical students: a three-wave longitudinal study
Creators: name: Wang, Qinghua
name: Sun, Wei
name: Wu, Huazhang
Publisher: name: figshare
Year: 2022
Subjects: Medicine
Biological Sciences not elsewhere classified
Science Policy

description: Additional file 3. Changes in medical students' academic burnout, resilience and life satisfaction regarding gender over the three waves.
HiPaR: Hierarchical Pattern-aided Regression
Creators: name: Galárraga, Luis
name: Pelgrin, Olivier
name: Termier, Alexandre
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: We introduce HiPaR, a novel pattern-aided regression method for tabular data containing both categorical and numerical attributes. HiPaR mines hybrid rules of the form $p \Rightarrow y = f(X)$ where $p$ is the characterization of a data region and $f(X)$ is a linear regression model on a variable of interest $y$. HiPaR relies on pattern mining techniques to identify regions of the data where the target variable can be accurately explained via local linear models. The novelty of the method lies in the combination of an enumerative approach to explore the space of regions and efficient heuristics that guide the search. Such a strategy provides more flexibility when selecting a small set of jointly accurate and human-readable hybrid rules that explain the entire dataset. As our experiments shows, HiPaR mines fewer rules than existing pattern-based regression methods while still attaining state-of-the-art prediction performance.
GALI: a Gamma-ray Burst Localizing Instrument
Creators: name: Rahin, Roi
name: Moleri, Luca
name: Vdovin, Alex
name: Feigenboim, Amir
name: Margolin, Solomon
name: Tarem, Shlomit
name: Behar, Ehud
name: Ghelman, Max
name: Osovizky, Alon
Publisher: name: arXiv
Year: 2021
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: The detection of astrophysical Gamma-Ray Bursts (GRBs) has always been intertwined with the challenge of identifying the direction of the source. Accurate angular localization of better than a degree has been achieved to date only with heavy instruments on large satellites, and a limited field of view. The recent discovery of the association of GRBs with neutron star mergers gives new motivation for observing the entire $γ$-ray sky at once with high sensitivity and accurate directional capability. We present a novel $γ$-ray detector concept, which utilizes the mutual occultation between many small scintillators to reconstruct the GRB direction. We built an instrument with 90 (9\,mm)$^3$ \csi~scintillator cubes attached to silicon photomultipliers. Our laboratory prototype tested with a 60\,keV source demonstrates an angular accuracy of a few degrees for $\sim$25 ph\,cm$^{-2}$ bursts. Simulations of realistic GRBs and background show that the achievable angular localization accuracy with a similar instrument occupying $1$l volume is $<2^\circ$. The proposed concept can be easily scaled to fit into small satellites, as well as large missions.
Resonant Spin-Transfer-Driven Switching of Magnetic Devices Assisted by Microwave Current Pulses
Creators: name: Cui, Y. -T.
name: Sankey, J. C.
name: Wang, C.
name: Thadani, K. V.
name: Li, Z. -P.
name: Buhrman, R. A.
name: Ralph, D. C.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: The torque generated by the transfer of spin angular momentum from a spin-polarized current to a nanoscale ferromagnet can switch the orientation of the nanomagnet much more efficiently than a current-generated magnetic field, and is therefore in development for use in next-generation magnetic random access memory (MRAM). Up to now, only DC currents and square-wave current pulses have been investigated in spin-torque switching experiments. Here we present measurements showing that spin transfer from a microwave-frequency pulse can produce a resonant excitation of a nanomagnet and lead to improved switching characteristics in combination with a square current pulse. With the assistance of a microwave-frequency pulse, the switching time is reduced and achieves a narrower distribution than when driven by a square current pulse alone, and this can permit significant reductions in the integrated power required for switching. Resonantly excited switching may also enable alternative, more compact MRAM circuit architectures.
description: 26 pages, 6 figures
Additional file 1: of Prediction of three lipid derivatives for postoperative gastric cancer mortality: the Fujian prospective investigation of cancer (FIESTA) study
Creators: name: Hu, Dan
name: Peng, Feng
name: Lin, Xiandong
name: Chen, Gang
name: Liang, Binying
name: Chen, Ying
name: Li, Chao
name: Zhang, Hejun
name: Fan, Guohui
name: Xu, Guodong
name: Xia, Yan
name: Lin, Jinxiu
name: Zheng, Xiongwei
name: Niu, Wenquan
Publisher: name: figshare
Year: 2018
Subjects: subject: Medicine
subject: Genetics
subject: FOS: Biological sciences
subject: Chemical Sciences not elsewhere classified
subject: Biological Sciences not elsewhere classified
subject: Mathematical Sciences not elsewhere classified
subject: Developmental Biology
subject: Cancer
subject: Infectious Diseases
subject: FOS: Health sciences

description: Figure S1. Calibration curves for predicting the risk of gastric cancer mortality at 3Â years (A), 5Â years (B) and 10Â years (C) among all gastric cancer patients. Nomogram-predicted probability of overall survival is plotted on the X-axis, and actual overall survival is plotted on the Y-axis. (PDF 79 kb)
Informal, semi-formal, and formal approaches to the specification of software requirements
Creators: name: Wong Cheng In, Marie Hélène LinLee.
Publisher: name: University of British Columbia
Year: 2009

description: The derivation of a specification document that is understandable, precise and unambiguous is indispensable to successful software development. This work investigates the advantages and disadvantages of four different specification approaches which vary in their degree of formality. The thesis outlines qualities of a good specification. An example requirements specification of a case study system is produced using each technique. The four specification approaches are ad hoc natural language approach (informal), threadsbased technique (structured informal), Computer-Aided Software Engineering (CASE) methodology Structured Analysis (semi-formal), and the mathematical notation Z (formal). The specification techniques are compared based on their likelihood to produce a specification document which is useful to customers, design engineers, test engineers, and maintenance personnel. The main conclusion is that using techniques that provide both a high degree of guidance and process description for deriving the specification is critical to achieve high quality specifications. Hence, a good specification technique must inherently have guidelines that facilitate the specification of requirements in an understandable, precise and unambiguous manner.
Electroproduction of heavy vector mesons using holographic QCD: from near threshold to high energy regimes
Creators: name: Mamo, Kiminad A.
name: Zahed, Ismail
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Theory (hep-th)
subject: Nuclear Experiment (nucl-ex)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We develop a non-perturbative analysis of the electro-production of heavy vector mesons ($ϕ$, $J/Ψ$) from threshold to high energy. We use the holographic construction with bulk confinement enforced through a soft wall. Using Witten diagrams, we evaluate the pertinent cross sections for heavy vector mesons ($ϕ$, $J/Ψ$) production and study their dependence on both the incoming virtual photon polarization as well as the outgoing polarization of the heavy meson. Our results for $J/Ψ$ electro-production compares well with the available HERA data at low and intermediate $Q^2$, and for a wide range of momentum transfer. We also predict the quasi-real electro-production of $J/Ψ$ near threshold.
description: 30 pages (with two columns), 13 figures, extension of our work on photo-production arXiv:1910.04707 with overlapping appendix
Основы инвестиционной привлекательности компании на примере телекоммуникационной отрасли России
Creators: name: Панферова Анастасия Сергеевна
Publisher: name: Московский экономический журнал
Year: 2019
Subjects: оценка инвестиционной привлекательности
телекоммуникационная отрасль.

description: Инвестиционная привлекательность является базовым понятием, которое характеризует возможность инвестированного капитала приносить доход в долгосрочной перспективе. Целью данной статьи является выявление особенностей применение различных методов оценки инвестиционной привлекательности компании на примере телекоммуникационной отрасли России. Для этого производится сравнение четырех крупнейших компаний по показателям первого и второго уровней согласно методологии оценки инвестиционной привлекательности.
description: Investment attractiveness is a basic concept that characterizes the ability of invested capital to generate income in the long run. The purpose of this article is to identify the features of the application of various methods for assessing the investment attractiveness of a company on the example of the telecommunications industry in Russia. To do this, compare the four largest companies in terms of the first and second levels according to the methodology for assessing investment attractiveness.
Cooling of radiative quantum-dot excitons by terahertz radiation: A spin-resolved Monte Carlo carrier dynamics model
Creators: name: Boxberg, Fredrik
name: Tulkki, Jukka
name: Yusa, Go
name: Sakaki, Hiroyuki
Publisher: name: arXiv
Year: 2006
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We have developed a theoretical model to analyze the anomalous cooling of radiative quantum dot (QD) excitons by THz radiation reported by Yusa et al [Proc. 24th ICPS, 1083 (1998)]. We have made three-dimensional (3D) modeling of the strain and the piezoelectric field and calculated the 3D density of states of strain induced quantum dots. On the basis of this analysis we have developed a spin dependent Monte Carlo model, which describes the carrier dynamics in QD's when the intraband relaxation is modulated by THz radiation. We show that THz radiation causes resonance transfer of holes from dark to radiative states in strain-induced QD's. The transition includes a spatial transfer of holes from the piezoelectric potential mimima to the deformation potential minimum. This phenomenon strongly enhances the QD ground state luminescence at the expense of the luminescence from higher states. Our model also reproduces the delayed flash of QD ground state luminescence, activated by THz radiation even $\sim1$ s after the carrier generation. Our simulations suggest a more general possibility to cool the radiative exciton subsystem in optoelectronic devices.
description: 18 pages, 1 table, 8 figures, submitted to Physical Review B v2: major conceptual changes. The article was extended considerably to suit Physical Review B (instead of Physical Review Letters)
Worte gesprochen bei und nach der Beerdigung von Johannes Kullen, Vorsteher des Töchter-Institutes in Kornthal
Creators: name: Kapff, Ludwig Heinrich
Publisher: name: Gedruckt in der Röcker'schen Officin
Year: 1842
Subjects: subject: 920 Biografien, Genealogie, Insignien
subject: Nachruf
subject: Kullen, Johannes
subject: Hülben

description: Enthält: Rede von Pfarrer Kapff
Discovery of two TNO-like bodies in the asteroid belt
Creators: name: Hasegawa, Sunao
name: Marsset, Michael
name: DeMeo, Francesca E.
name: Bus, Schelte J.
name: Geem, Jooyeon
name: Ishiguro, Masateru
name: Im, Myungshin
name: Kuroda, Daisuke
name: Vernazza, Pierre
Publisher: name: arXiv
Year: 2021
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Two extremely red main-belt asteroids: 203 Pompeja and 269 Justitia, were identified from combined visible and near-infrared spectroscopic observations collected at the IRTF and SAO observatories. These two asteroids have a redder spectral slope than any other D-type body, which are the reddest objects in the asteroid belt, and similar to RR and IR-class objects found in the outer Solar System among trans-Neptunian objects and Centaurs. Spectroscopic results suggest the presence of complex organic materials on the surface layer of these asteroids, implying that they could have formed in the vicinity of Neptune and been transplanted to the main belt region during a phase of planetary migration. 203 Pompeia is the only very red asteroid known so far among the ~250 bodies with diameter larger than 110 km (i.e. presumably structurally intact) found in the asteroid belt. These discoveries add another piece of evidence that the main asteroid belt hosts a population of bodies that were formed in the outskirt of the Solar System.
description: 12 pages, 5 figures, 1 tables, Accepted for publication in ApJ Letters
String integrability of defect CFT and dynamical reflection matrices
Creators: name: Linardopoulos, Georgios
name: Zarembo, Konstantin
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The D3-D5 probe-brane system is holographically dual to a defect CFT which is known to be integrable. The evidence comes mainly from the study of correlation functions at weak coupling. In the present work we shed light on the emergence of integrability on the string theory side. We do so by constructing the double row transfer matrix which is conserved when the appropriate boundary conditions are imposed. The corresponding reflection matrix turns out to be dynamical and depends both on the spectral parameter and the string embedding coordinates.
description: 19 pages
A class of space-times of non-rigidly rotating dust
Creators: name: Bratek, Lukasz
name: Jalocha, Joanna
name: Kutschera, Marek
Publisher: name: arXiv
Year: 2006
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We find a class of exact solutions of differentially rotating dust in the framework of General Relativity. There exist asymptotically flat space-times of the flow with positive mass function that for radii sufficiently large is monotonic and tends to zero at infinity. Some of the space-times may have non-vanishing total angular momentum. The flow is essentially different from another exactly solvable flow described by van Stockum line element.
Modal dynamics in multimode optical fibers: An attractor of high-order modes
Creators: name: He, Weitao
name: Wu, Ruihuan
name: Hong, Weiyi
name: Luo, Aiping
Publisher: name: arXiv
Year: 2021
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Multimode fibers (MMFs) support abundant spatial modes and involve rich spatiotemporal dynamics, yielding many promising applications. Here, we investigate the influences of the number and initial energy of high-order modes (HOMs) on the energy flow from the intermediate modes (IMs) to the fundamental mode (FM) and HOMs. It is quite surprising that random distribution of high-order modes evolves to a stationary one, indicating the asymptotic behavior of orbits in the same attraction domain. By employing the Lyapunov exponent, we prove that the threshold of the HOMs-attractor is consistent with the transition point of the energy flow which indiactes the HOMs-attracotr acts as a "valve" in the modal energy flow. Our results provide a new perspective to explore the nonlinear phenomena in MMFs, such as Kerr self-cleaning, and may pave the way to some potential applications, such as secure communications in MMFs.
Singly- and doubly-deuterated formaldehyde in massive star-forming regions
Creators: name: Zahorecz, S.
name: Jimenez-Serra, I.
name: Testi, L.
name: Immer, K.
name: Fontani, F.
name: Caselli, P.
name: Wang, K.
name: Onishi, T.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Deuterated molecules are good tracers of the evolutionary stage of star-forming cores. During the star formation process, deuterated molecules are expected to be enhanced in cold, dense pre-stellar cores and to deplete after protostellar birth. In this paper we study the deuteration fraction of formaldehyde in high-mass star-forming cores at different evolutionary stages to investigate whether the deuteration fraction of formaldehyde can be used as an evolutionary tracer. Using the APEX SEPIA Band 5 receiver, we extended our pilot study of the $J$=3$\rightarrow$2 rotational lines of HDCO and D$_2$CO to eleven high-mass star-forming regions that host objects at different evolutionary stages. High-resolution follow-up observations of eight objects in ALMA Band 6 were performed to reveal the size of the H$_2$CO emission and to give an estimate of the deuteration fractions HDCO/H$_2$CO and D$_2$CO/HDCO at scales of $\sim$6" (0.04-0.15 pc at the distance of our targets). Our observations show that singly- and doubly deuterated H$_2$CO are detected toward high-mass protostellar objects (HMPOs) and ultracompact HII regions (UCHII regions), the deuteration fraction of H$_2$CO is also found to decrease by an order of magnitude from the earlier HMPO phases to the latest evolutionary stage (UCHII), from $\sim$0.13 to $\sim$0.01. We have not detected HDCO and D$_2$CO emission from the youngest sources (high-mass starless cores, HMSCs). Our extended study supports the results of the previous pilot study: the deuteration fraction of formaldehyde decreases with evolutionary stage, but higher sensitivity observations are needed to provide more stringent constraints on the D/H ratio during the HMSC phase. The calculated upper limits for the HMSC sources are high, so the trend between HMSC and HMPO phases cannot be constrained.
description: 15 pages, 4 figures, 4 tables, accepted for publication in A&A
Nonlinear optical effects in artificial materials
Creators: name: Maimistov, Andrei I.
name: Gabitov, Ildar R.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Pattern Formation and Solitons (nlin.PS)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We consider some nonlinear phenomena in metamaterials with negative refractive index properties. Our consideration includes a survey of previously known results as well as identification of the phenomena that are important for applications of this new field. We focus on optical behavior of thin films as well as multi-wave interactions.
description: 22 pages, no figures. Submitted in book "Nonlinear waves in complex systems: energy flow and geometry"
A novel constraint-based data fusion system for limited-angle computed tomography
Creators: name: Boyd, Jeffrey Edwin
Publisher: name: University of British Columbia
Year: 2009

description: Computed tomography (CT) is a non-destructive evaluation technique that reconstructs the cross section of a specimen from x-ray raysum measurements. Whereas CT reconstruction is an ill-posed inverse problem that is easily solved, limited-angle CT, where raysum data are missing for a range of angles, is more severely ill-posed and more difficult to solve. In the limited-angle case, a priori assumptions are necessary to constrain the problem. Specimens wider than the x-ray source to sensor spacing require limited-angle CT. Furthermore, if the specimen is a sandwich structure, i.e., some core material surrounded by load-bearing face sheets, then the face sheets must lie in the null space. Components in the null space do not appear in the raysum data and thus confound CT reconstruction because there is no basis for interpolation. This thesis proposes a novel constraint-based data fusion method for limited-angle CT reconstruction of sandwich structures. The method reduces the reliance of limited-angle CT on assumptions by using range and ultrasound measurements to constrain the solution. Fusion of the data sources results in a problem with a much smaller null space that no longer includes the face sheets. The reduction of the null space in a manner consistent with the specimen yields a more accurate tomographic reconstruction. Synthetic and real data experiments show marked improvement in reconstruction accuracy achieved by using the fusion system.
Effective charge and free energy of DNA inside an ion channel
Creators: name: Zhang, Jingshan
name: Shklovskii, B. I.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Astrophysics (astro-ph)
subject: Subcellular Processes (q-bio.SC)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: Translocation of a single stranded DNA (ssDNA) through an alpha-hemolysin channel in a lipid membrane driven by applied transmembrane voltage V was extensively studied recently. While the bare charge of the ssDNA piece inside the channel is approximately 12 (in units of electron charge) measurements of different effective charges resulted in values between one and two. We explain these challenging observations by a large self-energy of a charge in the narrow water filled gap between ssDNA and channel walls, related to large difference between dielectric constants of water and lipid, and calculate effective charges of ssDNA. We start from the most fundamental stall charge $q_s$, which determines the force $F_s= q_s V/L$ stalling DNA against the voltage V (L is the length of the channel). We show that the stall charge $q_s$ is proportional to the ion current blocked by DNA, which is small due to the self-energy barrier. Large voltage V reduces the capture barrier which DNA molecule should overcome in order to enter the channel by $|q_c|V$, where $q_c$ is the effective capture charge. We expressed it through the stall charge $q_s$. We also relate the stall charge $q_s$ to two other effective charges measured for ssDNA with a hairpin in the back end: the charge $q_u$ responsible for reduction of the barrier for unzipping of the hairpin and the charge $q_e$ responsible for DNA escape in the direction of hairpin against the voltage. At small V we explain reduction of the capture barrier with the salt concentration.
description: Typos are corrected
Miec: A Bayesian hierarchical model for the analysis of nearby young open clusters
Creators: name: Olivares, J.
name: Bouy, H.
name: Sarro, L. M.
name: Moraux, E.
name: Berihuete, A.
name: Galli, P. A. B.
name: Miret-Roig, N.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Context. The analysis of luminosity and mass distributions of young stellar clusters is essential to understanding the star-formation process. However, the gas and dust left over by this process extinct the light of the newborn stars and can severely bias both the census of cluster members and its luminosity distribution. Aims. We aim to develop a Bayesian methodology to infer, with minimal biases due to photometric extinction, the candidate members and magnitude distributions of embedded young stellar clusters. Methods. We improve a previously published methodology and extend its application to embedded stellar clusters. We validate the method using synthetically extincted data sets of the Pleiades cluster with varying degrees of extinction. Results. Our methodology can recover members from data sets extincted up to Av ~ 6 mag with accuracies, true positive, and contamination rates that are better than 99%, 80%, and 9%, respectively. Missing values hamper our methodology by introducing contaminants and artifacts into the magnitude distributions. Nonetheless, these artifacts vanish through the use of informative priors in the distribution of the proper motions. Conclusions. The methodology presented here recovers, with minimal biases, the members and distributions of embedded stellar clusters from data sets with a high percentage of sources with missing values (>96%).
description: 21 pages, 24 figures
Σύνθεση και χαρακτηρισμός νανοσωματιδίων πυριτίου με τη μέθοδο αποδόμηση με laser
Creators: name: Τσελεκίδου, Δέσποινα Μιχαήλ
Publisher: name: Aristotle University of Thessaloniki
Year: 2017
Subjects: Νανοσωματίδια πυριτίου
Αποδόμηση με laser
Οπτικές ιδιότητες
Silicon nanoparticles
Laser ablation
Optical properties

description: Σκοπός της διπλωματικής εργασίας είναι η σύνθεση νανοσωματιδίων πυριτίου με τη μέθοδο αποδόμηση με laser σε υγρό περιβάλλον και στη συνέχεια η μελέτη και η ανάλυση των χαρακτηριστικών τους με τις μεθόδους χαρακτηρισμού. Συγκεκριμένα, στην παρούσα εργασία παράχθηκαν νανοσωματίδια πυριτίου p-type και n-type μέσα σε διαλύματα ακετόνης και αιθανόλης, τα οποία ακτινοβολήθηκαν με δύο συστήματα laser, εκ των οποίων το ένα έχει διάρκεια παλμού femtosecond και το άλλο το nanosecond. Όσον αφορά γενικά τη σύνθεση των νανοσωματιδίων πυριτίου επιβεβαιώθηκε πειραματικά η μεγάλη επίδραση που έχουν οι παράμετροι της ακτινοβολίας laser (ενέργεια δέσμης, χρονική διάρκεια παλμού, διάρκεια ακτινοβόλησης κ.λ.π) αλλά και το περιβάλλον (διαλύτης) στα χαρακτηριστικά των νανοσωματιδίων που παράγονται. Στη συνέχεια, ελέγχθηκε η χημική σύνθεση των νανοσωματιδίων μέσω της Φασματοσκοπίας Φωτοηλεκτρονίων από ακτίνες-Χ (XPS). Εξαιτίας της μορφολογίας και των χαρακτηριστικών των νανοσωματιδίων του πυριτίου δημιουργείται εκπομπή στην φασματική περιοχή του ιώδους. Για το λόγο αυτό, προσδιορίστηκαν οι οπτικές ιδιότητες των νανοσωματιδίων από τα φάσμα εκπομπής μέσω της Φασματοσκοπίας Φωτοφωταύγειας και τέλος προσδιορίστηκε ο αριθμός και το μέγεθος των σωματιδίων που σχηματίζονται μέσω της μεθόδου δυναμικής σκέδασης φωτός
description: The aim of this thesis is the composition of silicon nanoparticles by laser ablation method in a wet environment and then the study and analysis of their characteristics with the characterization methods. Specifically, in the present work were generated nanoparticles p-type and n-type silicon in solutions of acetone and ethanol, which were irradiated with two laser systems, one of which has a pulse duration of femtosecond and the other the nanosecond. In general the composition of silicon nanoparticles experimentally confirmed the large influence of the parameters of the laser radiation (energy of beam, duration of pulse, duration of irradiation) but also the wet environment (solvent) in the characteristics of the produced nanoparticles. Then, the chemical composition of the nanoparticles was tested by Photoelectron Spectroscopy X-ray (XPS). Due to the morphology and the characteristics of silicon nanoparticles generated emission in the spectral region of blue. For this reason, the optical properties of the nanoparticles were determined from the emission spectrum by photoluminescence spectroscopy and finally determined the number and size of the particles formed by the dynamic scattering light method
Lexical and grammatical elicitation: Colors, adjectives, verbs, verb paradigms with free pronouns
Creators: name: Chemtai, Sharon
name: Bossi, Madeline
name: Chebet Bett, Lydia
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2022
Subjects: subject: sgc

description: One .wav file and one .pdf file. Elicitation of lexical items for colors, various adjectives, and verbs. Elicitation of verbal agreement paradigms for intransitives and transitives with and without free pronouns.
Ποιοτική και ποσοτική κοστολόγηση της σεισμικής δραστηριότητας με τη χρήση Ημιμαρκοβιανού μοντέλου αμοιβών
Creators: name: Στεργίου, Ελισάβετ Αλέξανδρου
Publisher: name: Aristotle University of Thessaloniki
Year: 2017
Subjects: Ημιμαρκοβιανές αλυσίδες-αμοιβές
Σεισμική επικινδυνότητα
Semi Markov chain-Rewards
Seismic hazard

description: Στόχος της παρούσας διπλωματικής εργασίας είναι η κοστολόγηση/εκτίμηση της σεισμικής επικινδυνότητας μιας περιοχής με τη χρήση Ημι-Μαρκοβιανού μοντέλου αμοιβών, συνεκτιμώντας παραμέτρους όπως η πυκνότητα του πληθυσμού, ο χρόνος του σεισμού και φυσικά το μέγεθος του σεισμού. Στο πρώτο κεφάλαιο ορίζεται η μοντελοποίηση σύμφωνα με το Ημιμαρκοβιανό μοντέλο αμοιβών. Στο δεύτερο κεφάλαιο ορίζεται το Ημιμαρκοβιανό μοντέλο αμοιβών για την κοστολόγηση της σεισμικής επικινδυνότητας μιας περιοχής σε χρόνο διακριτό. Στο τρίτο κεφάλαιο υπολογίζεται (α) η μέση τιμή του κόστους και η αντίστοιχη διακύμανση και (β) οι αντίστοιχοι συντελεστές λοξότητας και κύρτωσης. Στο τέταρτο κεφάλαιο τα θεωρητικά αποτελέσματα εικονογραφούνται με χρήση δεδομένων από σεισμούς στην περιοχή της Χιλής έως το 2010. Τα δεδομένα οργανώθηκαν στη χρονική μονάδα του μοντέλου (α) την ημέρα και (β) το έτος. Στη συνέχεια υπολογίζονται η μέση τιμή και η διακύμανση για διάφορα χρονικά διαστήματα. Τέλος διατυπώνονται συμπεράσματα που προκύπτουν από τα αριθμητικά αποτελέσματα. Τέλος το πέμπτο κεφάλαιο περιέχει τους αλγορίθμους των προγραμμάτων που χρειάστηκε να κατασκευαστούν στα πλαίσια της εργασίας για τον υπολογισμό των παραμέτρων
description: The aim of the present thesis is the evaluation of seismic hazard of a large area apply in Semi-Markov model with rewards, taking into account parameters such as population density, the time of the earthquake and of course the size or the intensity of an earthquake. The first chapter provides the description and the definition of the attached reward model. The second chapter provides a detailed definition of the previous model, while in the third chapter the mean and the variance of the infernal cost is provided. Also, corresponding skewness and kurtosis coefficients are calculated. In the fourth chapter theoretical results are illustrated with data from earthquakes in Chile's region by 2010 in two cares. The mean and variance are calculated for various intervals. Conclusions and recommendations of the numerical results are provided. Last, the fifth chapter includes the algorithms that had to be constructed in order to calculate the previous parameters