cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Working on Work Problems
Creators: name: Alova, Chard Aye Reyes
Publisher: name: figshare
Year: 2021
Subjects: subject: 10399 Numerical and Computational Mathematics not elsewhere classified
subject: FOS: Mathematics
subject: 80299 Computation Theory and Mathematics not elsewhere classified
subject: FOS: Computer and information sciences
subject: 80202 Applied Discrete Mathematics
subject: 10299 Applied Mathematics not elsewhere classified

description: When working on fractions, one can use the Vedic sutra Transpose and Apply to solve faster and with much ease. From here, one can then extend the application of this sutra in fractions and use it in problems involved in the real-world. One of those problems is Work Problems; that is, if person 1 can do the work in time t1, and person 2 can do the work time t2, how long will it take if they work together? Work Problems are very common in any type of examination, especially in licensure examinations in the general education questions because of their wide applications in real-life. Using the Vedic Method, these kinds of problems can be answered faster. This paper shows the firepower of the sutra Transpose and Apply on Work Problems, and the sutras By Elimination and Retention and The Sum of the Products to extend them to n persons.
Comparison of 3.6 - 8.0 Micron Spitzer/IRAC Galactic Center Survey Point Sources with Chandra X-Ray Point Sources in the Central 40x40 Parsecs
Creators: name: Arendt, R. G.
name: Gezari, D. Y.
name: Stolovy, S. R.
name: Sellgren, K.
name: Smith, R.
name: Ramirez, S. V.
name: Yusef-Zadeh, F.
name: Law, C. J.
name: Smith, H. A.
name: Cotera, A. S.
name: Moseley, S. H.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We have studied the correlation between 2357 Chandra X-ray point sources in a 40 x 40 parsec field and ~20,000 infrared sources we observed in the corresponding subset of our 2 x 1.4 degree Spitzer/IRAC Galactic Center Survey at 3.6-8.0 um, using various spatial and X-ray hardness thresholds. The correlation was determined for source separations of less than 0.5", 1" or 2". Only the soft X-ray sources show any correlation with infrared point sources on these scales, and that correlation is very weak. The upper limit on hard X-ray sources that have infrared counterparts is <1.7% (3 sigma). However, because of the confusion limit of the IR catalog, we only detect IR sources with absolute magnitudes < ~1. As a result, a stronger correlation with fainter sources cannot be ruled out. Only one compact infrared source, IRS 13, coincides with any of the dozen prominent X-ray emission features in the 3 x 3 parsec region centered on Sgr A*, and the diffuse X-ray and infrared emission around Sgr A* seems to be anti-correlated on a few-arcsecond scale. We compare our results with previous identifications of near-infrared companions to Chandra X-ray sources.
description: 28 pages, 8 Postscript figures (low resolution). Accepted for publication in the ApJ
Latihan Soal Jaringan Syaraf Buatan dengan Matlab
Creators: name: Dr. Valentinus Galih Vidia Putra, M.Sc
Publisher: name: Zenodo
Year: 2021
Subjects: Artificial Neural network

description: Dr. Valentinus Galih Vidia Putra, M.Sc is an experienced MATLAB programmer and user. He also works
 with algorithms of large datasets drawn from AI, and Machine Learning. He
 has worked at the Ministry of Industry, the Republic of Indonesia. In this course the Matlab code was designed for undergraduate students, especially on the Artificial Neural Network.
title: ATMOS 2008 Abstracts Collection -- 8th Workshop on Algorithmic Approaches for Transportation Modeling, Optimization, and Systems
Creators: name: Fischetti, Matteo
name: Widmayer, Peter
Publisher: name: Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Year: 2008

description: Proceedings of the 8th Workshop on Algorithmic Approaches for Transportation
Modeling, Optimization, and Systems, held on Septmeber 18
in Karlsruhe, Germany.
description: OASIcs, Vol. 9, 8th Workshop on Algorithmic Approaches for Transportation Modeling, Optimization, and Systems (ATMOS'08), pages i-vii
Three faint-source microlensing planets detected via resonant-caustic channel
Creators: name: Han, Cheongho
name: Udalski, Andrzej
name: Kim, Doeon
name: Ryu, Yoon-Hyun
name: Bozza, Valerio
name: Albrow, Michael D.
name: Chung, Sun-Ju
name: Gould, Andrew
name: Hwang, Kyu-Ha
name: Jung, Youn Kil
name: Lee, Chung-Uk
name: Shin, In-Gu
name: Shvartzvald, Yossi
name: Yee, Jennifer C.
name: Zang, Weicheng
name: Cha, Sang-Mok
name: Kim, Dong-Jin
name: Kim, Hyoun-Woo
name: Kim, Seung-Lee
name: Lee, Dong-Joo
name: Lee, Yongseok
name: Park, Byeong-Gon
name: Pogge, Richard W.
name: Mróz, Przemek
name: Szymański, Michał K.
name: Skowron, Jan
name: Poleski, Radosław
name: Soszyński, Igor
name: Pietrukowicz, Paweł
name: Kozłowski, Szymon
name: Ulaczyk, Krzysztof
name: Rybicki, Krzysztof A.
name: Iwanek, Patryk
name: Wrona, Marcin
name: Gromadzki, Mariusz
Publisher: name: arXiv
Year: 2021
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We conducted a project of reinvestigating the 2017--2019 microlensing data collected by the high-cadence surveys with the aim of finding planets that were missed due to the deviations of planetary signals from the typical form of short-term anomalies. The project led us to find three planets including KMT-2017-BLG-2509Lb, OGLE-2017-BLG-1099Lb, and OGLE-2019-BLG-0299Lb. The lensing light curves of the events have a common characteristic that the planetary signals were produced by the crossings of faint source stars over the resonant caustics formed by giant planets located near the Einstein rings of host stars. For all planetary events, the lensing solutions are uniquely determined without any degeneracy. It is estimated that the host masses are in the range of $0.45\lesssim M/M_\odot \lesssim 0.59$, which corresponds to early M to late K dwarfs, and thus the host stars are less massive than the sun. On the other hand, the planets, with masses in the range of $2.1\lesssim M/M_{\rm J}\lesssim 6.2$, are heavier than the heaviest planet of the solar system, that is, Jupiter. The planets in all systems lie beyond the snow lines of the hosts, and thus the discovered planetary systems, together with many other microlensing planetary systems, support that massive gas-giant planets are commonplace around low-mass stars. We discuss the role of late-time high-resolution imaging in clarifying resonant-image lenses with very faint sources.
description: 10 pages, 13 figures, 6 tables
Nanomechanical-resonator-assisted induced transparency in a Cooper-pair-box system
Creators: name: Yuan, Xiao-Zhong
name: Goan, Hsi-Sheng
name: Lin, Chien-Hung
name: Zhu, Ka-Di
name: Jiang, Yi-Wen
Publisher: name: arXiv
Year: 2008
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We propose a scheme to demonstrate the electromagnetically induced transparency (EIT) in a system of a superconducting Cooper-pair box coupled to a nanomechanical resonator. In this scheme, the nanomechanical resonator plays an important role to contribute additional auxiliary energy levels to the Cooper-pair box so that the EIT phenomenon could be realized in such a system. We call it here resonator-assisted induced transparency (RAIT). This RAIT technique provides a detection scheme in a real experiment to measure physical properties, such as the vibration frequency and the decay rate, of the coupled nanomechanical resonator.
description: To appear in New Journal of Physics: Special Issue "Mechanical Systems at the Quantum Limit"
Robust plasmon waveguides in strongly-interacting nanowire arrays
Creators: name: Manjavacas, A.
name: de Abajo, F. J. García
Publisher: name: arXiv
Year: 2008
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: Arrays of parallel metallic nanowires are shown to provide a tunable, robust, and versatile platform for plasmon interconnects, including high-curvature turns with minimum signal loss. The proposed guiding mechanism relies on gap plasmons existing in the region between adjacent nanowires of dimers and multi-wire arrays. We focus on square and circular silver nanowires in silica, for which excellent agreement between both boundary element method and multiple multipolar expansion calculations is obtained. Our work provides the tools for designing plasmon-based interconnects and achieving high degree of integration with minimum cross talk between adjacent plasmon guides.
description: 4 pages, 5 figures
Experimental observation of an entire family of four-photon entangled states
Creators: name: Wieczorek, Witlef
name: Schmid, Christian
name: Kiesel, Nikolai
name: Pohlner, Reinhold
name: Gühne, Otfried
name: Weinfurter, Harald
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: A single linear optical set-up is used to observe an entire family of four-photon entangled states. This approach breaks with the inflexibility of present linear-optical set-ups usually designed for the observation of a particular multi-partite entangled state only. The family includes several prominent entangled states that are known to be highly relevant for quantum information applications.
description: 4 pages, 4 figures
Happy MitM: Fun and Toys in Every Bluetooth Device
Creators: name: Classen, Jiska
name: Hollick, Matthias
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cryptography and Security (cs.CR)
subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: Bluetooth pairing establishes trust on first use between two devices by creating a shared key. Similar to certificate warnings in TLS, the Bluetooth specification requires warning users upon issues with this key, because this can indicate ongoing Machine-in-the-Middle (MitM) attacks. This paper uncovers that none of the major Bluetooth stacks warns users, which violates the specification. Clear warnings would protect users from recently published and potential future security issues in Bluetooth authentication and encryption.
Learning a Reversible Embedding Mapping using Bi-Directional Manifold Alignment
Creators: name: Ganesan, Ashwinkumar
name: Ferraro, Francis
name: Oates, Tim
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computation and Language (cs.CL)
subject: Artificial Intelligence (cs.AI)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: We propose a Bi-Directional Manifold Alignment (BDMA) that learns a non-linear mapping between two manifolds by explicitly training it to be bijective. We demonstrate BDMA by training a model for a pair of languages rather than individual, directed source and target combinations, reducing the number of models by 50%. We show that models trained with BDMA in the "forward" (source to target) direction can successfully map words in the "reverse" (target to source) direction, yielding equivalent (or better) performance to standard unidirectional translation models where the source and target language is flipped. We also show how BDMA reduces the overall size of the model.
Is dark matter an extra-dimensional effect?
Creators: name: Kahil, M. E.
name: Harko, T.
Publisher: name: arXiv
Year: 2008
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We investigate the possibility that the observed behavior of test particles outside galaxies, which is usually explained by assuming the presence of dark matter, is the result of the dynamical evolution of particles in higher dimensional space-times. Hence, dark matter may be a direct consequence of the presence of an extra force, generated by the presence of extra-dimensions, which modifies the dynamic law of motion, but does not change the intrinsic properties of the particles, like, for example, the mass (inertia). We discuss in some detail several possible particular forms for the extra force, and the acceleration law of the particles is derived. Therefore, the constancy of the galactic rotation curves may be considered as an empirical evidence for the existence of the extra dimensions.
description: 11 pages, no figures, accepted for publication in MPLA; references added
On the space of quantum fields in massive two-dimensional theories
Creators: name: Delfino, Gesualdo
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: For a large class of integrable quantum field theories we show that the S-matrix determines a space of fields which decomposes into subspaces labeled, besides the charge and spin indices, by an integer k. For scalar fields k is non-negative and is naturally identified as an off-critical extension of the conformal level. To each particle we associate an operator acting in the space of fields whose eigenvectors are primary (k=0) fields of the massive theory. We discuss how the existing results for models as different as Z_n, sine-Gordon or Ising with magnetic field fit into this classification.
description: 17 pages
title: Σεισμική αποτίμηση φέρουσας ικανότητας υφιστάμενου πολυώροφου κτιρίου Ω.Σ.
title: Seismic assessment of bearing capacity of an existing multi-storey reinforced concrete building
titleType: AlternativeTitle
Creators: name: Κολιού, Ανδρομάχη
Publisher: name: Πανεπιστήμιο Δυτικής Αττικής
Year: 2021
Subjects: Σεισμική αποτίμηση
Αποτίμηση φέρουσας ικανότητας
Ανελαστική στατική ανάλυση
ΚΑΝΕΠΕ
SeismoStruct

description: Η παρούσα διπλωματική εργασία εκπονήθηκε το ακαδημαϊκό έτος 2020-2021 στο τμήμα Πολιτικών Μηχανικών του Πανεπιστημίου Δυτικής Αττικής υπό την επίβλεψη του Αναπληρωτή Καθηγητή κ. Ρεπαπή Κωνσταντίνου. Αφορά την μελέτη ενός πενταώροφου κτιρίου από οπλισμένο σκυρόδεμα. Το κτίριο αυτό θα προσομοιωθεί με το λογισμικό Seismostruct και θα πραγματοποιηθούν στατικές ανελαστικές αναλύσεις (pushover) για την αποτίμηση της φέρουσας ικανότητάς του. Η αποτίμηση θα γίνει σύμφωνα με τους σύγχρονους κανονισμούς ΚΑΝΕΠΕ και EC8-3. Επιπροσθέτως, για να διερευνηθεί περαιτέρω η φέρουσα ικανότητα του κτιρίου, έγινε προσθήκη τοιχοπληρώσεων σε όλους τους ορόφους.
title: Τηλεργασία στο δημόσιο τομέα: Μελέτη περίπτωσης Συνηγόρου του Πολίτη
title: Teleworking in the public sector: A case study of the Greek Ombudsman
titleType: AlternativeTitle
Creators: name: Κούγια, Χριστίνα
Publisher: name: Πανεπιστήμιο Δυτικής Αττικής
Year: 2021
Subjects: Τηλεργασία
Δημόσιος τομέας
Συνήγορος του πολίτη
Εξ αποστάσεως εργασία
Τηλεργαζόμενοι
Greek Ombudsman

description: Η τηλεργασία είναι μια μορφή εργασίας, η οποία επιτρέπει στον εργαζόμενο, μέσω της χρήσης μέσων τεχνολογίας, να εργάζεται απομακρυσμένα από το σπίτι του χωρίς να είναι απαραίτητη η φυσική του παρουσία στην έδρα εργασίας. Η τηλεργασία, παρόλο που έχει εδραιωθεί σχεδόν πλήρως στο πρόγραμμα εργασίας των επιχειρήσεων του εξωτερικού, στην Ελλάδα και δη στον δημόσιο τομέα, δεν είναι ευρέως διαδεδομένη. Σκοπός της έρευνας είναι η διερεύνηση των θετικών και αρνητικών επιδράσεων της τηλεργασίας στον δημόσιο τομέα και συγκεκριμένα στην Ανεξάρτητη Αρχή του Συνηγόρου του Πολίτη. Η εξέταση των επιδράσεων της τηλεργασίας στις συνθήκες εργασίας των εργαζομένων καθώς και στην διεκπεραίωση των καθημερινών εργασιών του δημοσίου τομέα είναι υψίστης σημασίας, Μέσω της παρούσης εργασίας επιχειρείται η διερεύνηση της συμβολής της τηλεργασίας ως μορφής εργασίας, στην αναβάθμιση των υπηρεσιών του δημοσίου τομέα στην Ελλάδα.
The Observatory for Multi-Epoch Gravitational Lens Astrophysics (OMEGA)
Creators: name: Moustakas, Leonidas A
name: Bolton, Adam J
name: Booth, Jeffrey T
name: Bullock, James S
name: Cheng, Edward
name: Coe, Dan
name: Fassnacht, Christopher D
name: Gorjian, Varoujan
name: Heneghan, Cate
name: Keeton, Charles R
name: Kochanek, Christopher S
name: Lawrence, Charles R
name: Marshall, Philip J
name: Metcalf, R Benton
name: Natarajan, Priyamvada
name: Nikzad, Shouleh
name: Peterson, Bradley M
name: Wambsganss, Joachim
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: (abridged) The Observatory for Multi-Epoch Gravitational Lens Astrophysics (OMEGA) is a mission concept for a 1.5-m near-UV through near-IR space observatory that will be dedicated to frequent imaging and spectroscopic monitoring of ~100 multiply-imaged active galactic nuclei over the whole sky. Using wavelength-tailored dichroics with extremely high transmittance, efficient imaging in six channels will be done simultaneously during each visit to each target. The separate spectroscopic mode, engaged through a flip-in mirror, uses an image slicer spectrograph. After a period of many visits to all targets, the resulting multidimensional movies can then be analyzed to a) measure the mass function of dark matter substructure; b) measure precise masses of the accreting black holes as well as the structure of their accretion disks and their environments over several decades of physical scale; and c) measure a combination of the local Hubble expansion and cosmological distances to unprecedented precision.
description: Proceedings paper for the SPIE Astronomical Telescopes and Instrumentation 2008
Estimation of the CMB temperature from atomic C\,{\sc i} and molecular CO lines in the interstellar medium of early galaxies
Creators: name: Klimenko, V. V.
name: Ivanchik, A. V.
name: Petitjean, P.
name: Noterdaeme, P.
name: Srianand, R.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The linear increase of the cosmic microwave background (CMB) temperature with cosmological redshift, $T_{\rm CMB} = T_0(1 + z)$, is a prediction of the standard cosmological $Λ$CDM model. There are currently two methods to measure this dependence at redshift $z>0$, and that is equally important to estimate the CMB temperature $T_0$ at the present epoch $z=0$. The first method is based on the Sunyaev-Zeldovich (SZ) effect for a galaxy cluster. aThe second method is based on the analysis of the populations of atomic and molecular energy levels observed in the absorption spectra of quasars. This method allows $T_{\rm CMB}(z)$ to be measured directly. We present new estimates of $T_{\rm CMB}(z_i)$ in the redshift range $1.7\le z_i \le3.3$ based on the analysis of excitation of the CO rotational levels and C\,{\sc i} fine-structure levels in 15 absorption systems. We take into account collisional excitation of CO and C\,{\sc i} with hydrogen atoms and H$_2$ and radiative pumping of C\,{\sc i} by the interstellar ultraviolet radiation. Applying this corrections leads to a systematic decrease in the previously obtained estimates of $T_{\rm CMB}(z_i)$ (for some systems the magnitude of the effect is $\sim$10\%). Combining our measurements with the measurements of $T_{\rm CMB}(z)$ in galaxy clusters we have obtained a constraint on the parameter $β=+0.010\pm0.013$, which characterizes the deviation of the CMB temperature from the standard relation, $T_{\rm CMB} = T_0(1 + z)^{1-β}$, and an independent estimate of the CMB temperature at the present epoch, $T_0 = 2.719\pm0.009$\,K, which agrees well with the estimate from orbital measurements, $T_0 = 2.7255\pm0.0006$\,K. This independent estimate is very important because it was obtained using cosmological data, in contrast to satellite measurements, which are obtained "here" and "now".
description: 8 pages, 4 figures, 5 tables
A comparison of the reversal shift task with two piagetian tasks
Creators: name: Lake, Jean Baird
Publisher: name: University of British Columbia
Year: 2010

description: A study was undertaken to compare the performance of kindergarten children on the optional reversal shift task with their performance on two Piagetian tasks, the matrix and the two-way classification tasks. The comparison was suggested by the fact that the reversal shift task has been used by Kendler and Kendler (1962) to provide evidence of a cognitive change occurring in children between 5 and 7 years of age. Piaget (1964) has also suggested a major change in children's thinking in the same age range and has used the classification and matrix tasks to illustrate this change. Three major theoretical views concerning the reversal shift task were examined: the mediational hypothesis of Kendler and Kendler (1962), the attention theory viewpoint of Zeaman and House (1963) and the perceptual differentiation view of Tighe and Tighe (1968). A number of studies dealing with the classification tasks were reviewed. These included studies by Inhelder and Piaget (1964), Kofsky (1966) and Smedslund (1964). Matrix task studies by Inhelder and Piaget (1964), Overton and Brodzinsky (1972), Bruner and Kenney (1966) and Odom et al. (1965, 1971) were also reviewed. The Piagetian and reversal shift tasks were analyzed to identify their common features. It was argued that all three tasks required the child to recognize the abstract dimensions of stimuli and to be able to use the dimension values appropriately. Because of the similarities involved in the three tasks, it was suggested that a child in the transitional stage who could perform well on the Piagetian tasks would also tend to make a reversal shift on the Kendler task. It was therefore hypothesized that for children in the 5- to 7-year age range there should be a positive correlation between performance on the classification and matrix tasks and the tendency to make a reversal shift. An experiment was carried out with 34 kindergarten subjects performing the three tasks: the optional reversal shift, the two-way classification task and the matrix task. Results obtained on each task were similar to those of previous studies but the hypothesized relationship was not upheld. It was suggested that a group of subjects including slightly older children might show this relationship in a similar experiment. Other possible explanations for the lack of relationship were examined including: task format, verbal factors, inconsistent performance by children in the transition period, attentional and motivational factors and differential transfer effects. In conclusion, it was felt that the study reinforced the view that more knowledge is needed of the factors involved in learning tasks. Investigations drawing on different approaches would appear to be helpful in identifying these factors.
„reparirt“ und „zugericht“.
Creators: name: Kirsch, Sebastian
Publisher: name: Humboldt-Universität zu Berlin
Year: 2021
Subjects: subject: Instrumentenbau
subject: Laute
subject: Transformation
subject: 780 Musik

description: Die Analyse historischer Musikinstrumente als authentische Zeugnisse der Vergangenheit betrifft im musealen Kontext nicht nur ihre Ursprünglichkeit und Originalität, sondern auch ihre Überlieferung, die Objektgeschichte, den durch Benutzung, Alterung, Veränderungen, Schäden und Reparaturen entstandenen Zustand. Eine Instrumentengattung, bei der die Dichotomie aus Original und Veränderung besonders evident ist, ist die der Lauten. Wie bei anderen Instrumenten galten auch alte Lauten für praktizierende Musiker_innen als besonders wertvoll, weshalb sie immer wieder an die jeweiligen musikalischen Anforderungen angepasst wurden. Kaum eine Laute ist ohne tiefgreifende Veränderungen erhalten. Die Aufgabe meines Dissertationsprojektes am Musikinstrumentenmuseum der Universität Leipzig mit dem Arbeitstitel „reparirt“ und „zugericht“ lautet, die Spuren der Veränderungen sowie der jeweiligen musikalischen Verwendung zu lesen und zu kontextualisieren. Der vorliegende Beitrag bietet einen Überblick über die ersten Ergebnisse des Vorhabens, den Abgleich technologischer Beobachtungen zu schriftlichen Zeugnissen zu Umbauten am Ende des 17. Jahrhunderts bis hin zur Weiterverwendung der alten Lauten als Lautengitarren zu Beginn des 19. Jahrhunderts. Erste methodische Annäherungen zur Beschreibung von sogenannten diachronen Objekten, die mehrere Zustände in sich vereinen, werden vorgestellt. Dabei werden neben der technologischen Analyse auch die gesellschaftliche Verortung der Instrumente und die Dauerhaftigkeit von Nutzungskonzepten wie der Spieltechnik in den Blick genommen.
Global Systems Performance Analysis For Mobile Communications (GSM) using Cellular Network CODECS
Creators: name: Maditsi, Maphuthego Etu
name: Phakathi, Thulani
name: Lugayizi, Francis
name: Esiefarienrhe, Michael
Publisher: name: arXiv
Year: 2021
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences
subject: C.2.0

description: Global System for Mobile Communications (GSM) is a cellular network that is popular and has been growing in recent years. It was developed to solve fragmentation issues of the first cellular system, and it addresses digital modulation methods, level of the network structure, and services. It is fundamental for organizations to become learning organizations to keep up with the technology changes for network services to be at a competitive level. A simulation analysis using the NetSim tool in this paper is presented for comparing different cellular network codecs for GSM network performance. These parameters such as throughput, delay, and jitter are analyzed for the quality of service provided by each network codec. Unicast application for the cellular network is modeled for different network scenarios. Depending on the evaluation and simulation, it was discovered that G.711, GSM_FR, and GSM-EFR performed better than the other codecs, and they are considered to be the best codecs for cellular networks. These codecs will be of best use to better the performance of the network in the near future.
Unitary polarized Fermi gas under adiabatic rotation
Creators: name: Bausmerth, I.
name: Recati, A.
name: Stringari, S.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We discuss the effect of an adiabatic rotation on the phase separation between the superfluid and normal component of a trapped polarized Fermi gas at unitarity and zero temperature, under the assumption that quantized vortices are not formed. We show that the Chandrasekhar-Clogston limit $n_{\downarrow}/\n_{\uparrow}$ characterizing the local polarization in the normal phase at the interface is enhanced by the rotation as a consequence of the centrifugal effect. The density profiles (local and column integral) of the two spin species are calculated as a function of the angular velocity for different values of the polarization. The critical value of the angular velocity at which the superfluid exhibits a spontaneous quadrupole deformation is also calculated for the unpolarized case.
description: 8 pages, 11 figures, discussion added according to referee report, final version as published
title: Παρακίνηση & εργασιακή ικανοποίηση στη Δημόσια Διοίκηση. Μελέτη περίπτωσης: Κέντρο Είσπραξης Ασφαλιστικών Οφειλών του e-Ε.Φ.Κ.Α.
title: Motivation & work satisfaction in Public Administration. Case study: Insurance Debt Collection Center of e-E.F.K.A.
titleType: AlternativeTitle
Creators: name: Σπηλιοπούλου, Χρυσούλα
Publisher: name: Πανεπιστήμιο Δυτικής Αττικής
Year: 2021
Subjects: Παρακίνηση εργαζομένων
Εργασιακή ικανοποίηση
Δημόσια διοίκηση
ΚΕΑΟ
ΕΦΚΑ
e-ΕΦΚΑ
Παρακίνηση

description: Σκοπός της παρούσας μεταπτυχιακής διπλωματικής εργασίας είναι η διερεύνηση και η ανάλυση των απόψεων των εργαζομένων του Κ.Ε.Α.Ο., αναφορικά με το επίπεδο παρακίνησης και εργασιακής ικανοποίησης τους, καθώς και ο προσδιορισμός των παραγόντων παρακίνησης που συντελούν στην ενίσχυση των επιπέδων εργασιακής ικανοποίησης και κατ’ επέκταση στη βελτίωση της παραγωγικότητας τους. Προκειμένου να διερευνηθούν τα ερευνητικά ερωτήματα πραγματοποιήθηκε ποσοτική εμπειρική ανάλυση, σε δείγμα δημοσίων υπαλλήλων εργαζομένων του Κ.Ε.Α.Ο. Τα αποτελέσματα της έρευνας ανέδειξαν τόσο τους τρόπους παρακίνησης του ανθρώπινου δυναμικού, όσο και τα επίπεδα εργασιακής ικανοποίησης του, τα δε συμπεράσματα είναι συμβατά με τις θεωρίες που αναπτύχθηκαν στη βιβλιογραφική επισκόπηση. Δύνανται δε να αξιολογηθούν από τους διοικούντες, οι οποίοι με τις κατάλληλες διοικητικές δράσεις ίσως συνεισφέρουν στην αύξηση της παραγωγικότητας των εργαζομένων του Κ.Ε.Α.Ο., με θετικό αντίκτυπο στον πολίτη.
Schrift als Schutz
Creators: name: Meininghaus, Alisha
Publisher: name: Humboldt-Universität zu Berlin
Year: 2021
Subjects: subject: Judentum
subject: Amulette
subject: Magie
subject: 200 Religion

description: Geht man von der Annahme aus, es gäbe ein eindeutiges Magieverbot in der Tora, wäre zu vermuten, dass die Herstellung und Verwendung von Amuletten im Judentum verboten sei. Dies wird jedoch angesichts der zahllosen jüdischen Amulette, die in Museen und Sammlungen weltweit aufbewahrt und auch heute noch hergestellt und genutzt werden, mehr und mehr in Frage gestellt. Der vorliegende Aufsatz basiert auf ersten Recherchen zu meiner religionswissenschaftlichen Dissertation über jüdische Geburtsamulette an der Philipps-Universität Marburg. Dabei soll keine eigene Bewertung der jüdischen Amulett-Tradition vorgenommen werden, sondern es sind die Strategien nachzuzeichnen, durch die die Verwender_innen von Amuletten ihre Praxis als legitimen Bestandteil der jüdischen Religion ausweisen. Dazu wird ein jüdisches Amulett aus den Beständen der Religionskundlichen Sammlung in Marburg als Beispiel dienen.
The Hot Interstellar Medium in Normal Elliptical Galaxies III: The Thermal Structure of the Gas
Creators: name: Diehl, Steven
name: Statler, Thomas S.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: This is the third paper in a series analyzing X-ray emission from the hot interstellar medium in a sample of 54 normal elliptical galaxies observed by Chandra, focusing on 36 galaxies with sufficient signal to compute radial temperature profiles. We distinguish four qualitatively different types of profile: positive gradient (outwardly rising), negative gradients (falling), quasi-isothermal (flat) and hybrid (falling at small radii, then rising). We measure the mean logarithmic temperature gradients in two radial regions: from 0--2 $J$-band effective radii $R_J$ (excluding the central point source), and from 2--$4R_J$. We find the outer gradient to be uncorrelated with intrinsic host galaxy properties, but strongly influenced by the environment: galaxies in low-density environments tend to show negative outer gradients, while those in high-density environments show positive outer gradients, suggesting influence of circumgalactic hot gas. The inner temperature gradient is unaffected by the environment but strongly correlated with intrinsic host galaxy characteristics: negative inner gradients are more common for smaller, optically faint, low radio-luminosity galaxies, whereas positive gradients are found in bright galaxies with stronger radio sources. There is no evidence for bimodality in the distribution of inner or outer gradients. We propose three scenarios to explain the inner temperature gradients: (1) Weak AGN heat the ISM locally, higher-luminosity AGN heat the system globally through jets inflating cavities at larger radii; (2) The onset of negative inner gradients indicates a declining importance of AGN heating relative to other sources, such as compressional heating or supernovae; (3) The variety of temperature profiles are snapshots of different stages of a time-dependent flow.
description: 18 pages, emulateapj, 55 figures (36 online-only figures included in astro-ph version), submitted to ApJ
title: Ο ρόλος Τεχνολογιών Πληροφοριών και Επικοινωνίας (ΤΠΕ) στην παροχή διοικητικού και εκπαιδευτικού έργου στην μετά πανδημία εποχή
title: The role of ICT in providing administrative and educational work in the post-pandemic era
titleType: AlternativeTitle
Creators: name: Βαλσάμη, Ειρήνη
Publisher: name: Πανεπιστήμιο Πειραιώς
Year: 2021
Subjects: subject: Εξ αποστάσεως εκπαίδευση
subject: ΤΠΕ
subject: Διοίκηση
subject: Πανδημία

description: Εισαγωγή: Η αξιοποίηση των Τεχνολογιών Πληροφορίας και Επικοινωνίας (ΤΠΕ) όπως είναι της εξ’ αποστάσεως εκπαίδευσης στη μετά πανδημία εποχή από την εκπαιδευτική διοίκηση, μπορεί να γίνει σε κάθε βαθμίδα. Σημειώνεται πως πρόκειται για μια ακόμη μορφή τεχνολογίας. Μέσω αυτής, τόσο ο διδάσκων όσο και ο εκπαιδευόμενος μπορούν να επικοινωνούν, καθώς φέρει παρόμοια χαρακτηριστικά με τη δια ζώσης διδασκαλία. Σκοπός: Διερεύνηση των απόψεων των εκπαιδευτικών Δευτεροβάθμιας Εκπαίδευσης όσον αφορά στα πλεονεκτήματα και μειονεκτήματα της εφαρμογής της εξ αποστάσεως εκπαίδευσης καθώς και τη χρήση εργαλείων εξ αποστάσεως εκπαίδευσης κατά τη διάρκεια της πανδημίας. Μεθοδολογία: Για τη διεξαγωγή της έρευνας χρησιμοποιήθηκες η ποσοτική μέθοδος έρευνας με τη χρήση πλήρως δομημένου ερωτηματολογίου το οποίο διανεμήθηκε ηλεκτρονικά μέσω της πλατφόρμας GoogleForms. Αποτελέσματα: Ως σημαντικότερα πλεονεκτήματα αναδείχθηκαν οι δυνατότητες αποθήκευσης και επαναχρησιμοποίησης και εύκολης τροποποίησης - ανανέωσης του εκπαιδευτικού υλικού ενώ ως μειονεκτήματα αναδείχθηκαν τα τεχνικά προβλήματα, η περιορισμένη εμπλοκής και δυσκολία διατήρησης της ενεργής συμμετοχής των μαθητών και της έλλειψης άμεσης κοινωνικής αλληλεπίδρασης. Σχεδόν όλοι οι εκπαιδευτικού υλοποίησαν σύγχρονη και ασύγχρονη εξ αποστάσεως εκπαίδευση κατά τη διάκρεια κλεισίματος των σχολικών μονάδων. Οι περισσότεροι εκπαιδευτικοί επέλεξαν την το Ηλεκτρονικό Ταχυδρομείο (E-Mail) και την Ηλεκτρονική Τάξη (e-class) για την ασύγχρονη εξ αποστάσεως εκπαίδευση ενώ για τη σύγχρονη επέλεξαν ως το συχνότερα χρησιμοποιούμενο το Webex. Τέλος σχεδόν όλοι πλην ενός οι εκπαιδευτικοί της Δευτεροβάθμιας Εκπαίδευσης προτίθενται να συνεχίσουν να χρησιμοποιούν τα εργαλεία αυτά και στην μετά κορωνοϊού εποχή. Συμπεράσματα: Προκειμένου να αντιμετωπιστεί αυτή η πρωτοφανής κατάσταση, η συμβολή όλων των εκπαιδευτικών συστημάτων ήταν η δέουσα. Σε πρώτο επίπεδο, οι σχολικές μονάδες, τα πανεπιστήμια και εν γένει όλες οι εκπαιδευτικές δομές ανέστειλαν τη λειτουργία τους, σύμφωνα με τις συστάσεις των ειδικών, ούτως ώστε να μειωθεί η διασπορά του συγκεκριμένου ιού. Σε δεύτερο επίπεδο, ο σχεδιασμός τρόπων και μορφών εκπαίδευσης κρίθηκε απαραίτητος, προκειμένου να αντιμετωπιστεί αυτή η έκτακτη και πρωτόγνωρη κατάσταση.
Experimental and modeling study of the low-temperature oxidation of large alkanes
Creators: name: Biet, Joffrey
name: Hakka, Mohammed Hichem
name: Warth, Valérie
name: Glaude, Pierre-Alexandre
name: Battin-Leclerc, Frédérique
Publisher: name: arXiv
Year: 2008
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: This paper presents an experimental and modeling study of the oxidation of large linear akanes (from C10) representative from diesel fuel from low to intermediate temperature (550-1100 K) including the negative temperature coefficient (NTC) zone. The experimental study has been performed in a jet-stirred reactor at atmospheric pressure for n-decane and a n-decane/n-hexadecane blend. Detailed kinetic mechanisms have been developed using computer-aided generation (EXGAS) with improved rules for writing reactions of primary products. These mechanisms have allowed a correct simulation of the experimental results obtained. Data from the literature for the oxidation of n-decane, in a jet-stirred reactor at 10 bar and in shock tubes, and of n-dodecane in a pressurized flow reactor have also been correctly modeled. A considerable improvement of the prediction of the formation of products is obtained compared to our previous models. Flow rates and sensitivity analyses have been performed in order to better understand the influence of reactions of primary products. A modeling comparison between linear alkanes for C8 to C16 in terms of ignition delay times and the formation of light products is also discussed.
A family of transversely nonsimple knots
Creators: name: Khandhawit, Tirasan
name: Ng, Lenhard
Publisher: name: arXiv
Year: 2008
Subjects: subject: Geometric Topology (math.GT)
subject: Symplectic Geometry (math.SG)
subject: FOS: Mathematics
subject: 57R17, 57R58, 57M25

description: We apply knot Floer homology to exhibit an infinite family of transversely nonsimple prime knots starting with $10_{132}$. We also discuss the combinatorial relationship between grid diagrams, braids, and Legendrian and transverse knots in standard contact $\mathbb{R}^3$.
description: 19 pages, v2: minor corrections to statements in section 2.4
The optical spectrum of a large isolated polycyclic aromatic hydrocarbon: hexa-peri-hexabenzocoronene, C42H18
Creators: name: Kokkin, Damian L.
name: Troy, Tyler P.
name: Nakajima, Masakazu
name: Nauta, Klaas
name: Varberg, Thomas D.
name: Metha, Gregory F.
name: Lucas, Nigel T.
name: Schmidt, Timothy W.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The first optical spectrum of an isolated polycyclic aromatic hydrocarbon large enough to survive the photophysical conditions of the interstellar medium is reported. Vibronic bands of the first electronic transition of the all benzenoid polycyclic aromatic hydrocarbon hexa-peri-hexabenzocoronene were observed in the 4080-4530 Angstrom range by resonant 2-color 2-photon ionization spectroscopy. The strongest feature at 4264 Angstrom is estimated to have an oscillator strength of f=1.4x10^-3, placing an upper limit on the interstellar abundance of this polycyclic aromatic hydrocarbon at 4x10^12 cm^-2, accounting for a maximum of ~0.02% of interstellar carbon. This study opens up the possibility to rigorously test neutral polycyclic aromatic hydrocarbons as carriers of the diffuse interstellar bands in the near future.
description: 9 pages, 1 figure. Fixed a typo on the frequency of the 'b' band
title: WCET 2009 -- Preface to 9th International Workshop on Worst-Case Execution Time Analysis
Creators: name: Holsti, Niklas
Publisher: name: Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Year: 2009
Subjects: subject: Worst-case execution time
subject: WCET analysis
subject: real-time systems
subject: scheduling

description: On June 30, 2009, thirty-five people from nine countries and three
continents met in Trinity College, Dublin, to hold the 9th International
Workshop on Worst-Case Execution Time Analysis (WCET'09, http://www.artist-embedded.org/artist/WCET-2009.html). The workshop was
organised as a satellite event of the 21st Euromicro Conference on
Real-Time Systems (ECRTS'09, http://ecrts09.dsg.cs.tcd.ie). The final
proceedings here presented contain the workshop papers as updated in
response to the discussion at the workshop, the abstract of the invited
talk by prof. Petru Eles, and a summary of the panel discussion that
concluded the workshop. The slide presentations can be retrieved from
the workshop web-site referenced above.
description: OASIcs, Vol. 10, 9th International Workshop on Worst-Case Execution Time Analysis (WCET'09), pages i-iv
Slowly rotating scalar field wormholes: the second order approximation
Creators: name: Kashargin, P. E.
name: Sushkov, S. V.
Publisher: name: arXiv
Year: 2008
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We discuss rotating wormholes in general relativity with a scalar field with negative kinetic energy. To solve the problem, we use the assumption about slow rotation. The role of a small dimensionless parameter plays the ratio of the linear velocity of rotation of the wormhole's throat and the velocity of light. We construct the rotating wormhole solution in the second order approximation with respect to the small parameter. The analysis shows that the asymptotical mass of the rotating wormhole is greater than that of the non-rotating one, and the NEC violation in the rotating wormhole spacetime is weaker than that in the non-rotating one.
description: 12 pages, 9 figures, appeared in PRD
Guarding a Target Set from a Single Attacker in the Euclidean Space
Creators: name: Lee, Yoonjae
name: Bakolas, Efstathios
Publisher: name: arXiv
Year: 2021
Subjects: subject: Optimization and Control (math.OC)
subject: Systems and Control (eess.SY)
subject: FOS: Mathematics
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: This paper addresses a two-player target defense game in the $n$-dimensional Euclidean space where an attacker attempts to enter a closed convex target set while a defender strives to capture the attacker beforehand. We provide a complete and universal differential game-based solution which not only encompasses recent work associated with similar problems whose target sets have simple, low-dimensional geometric shapes, but can also address problems that involve nontrivial geometric shapes of high-dimensional target sets. The value functions of the game are derived in a semi-analytical form that includes a convex optimization problem. When the latter problem has a closed-form solution, one of the value functions is used to analytically construct the barrier surface that divides the state space of the game into the winning sets of players. For the case where the barrier surface has no analytical expression but the target set has a smooth boundary, the bijective map between the target boundary and the projection of the barrier surface is obtained. By using Hamilton-Jacobi-Isaacs equation, we verify that the proposed optimal state feedback strategies always constitute the game's unique saddle point whether or not the optimization problem has a closed-form solution. We illustrate our solutions via numerical simulations.
Integrable inhomogeneous NLS equations are equivalent to the standard NLS
Creators: name: Kundu, Anjan
Publisher: name: arXiv
Year: 2008
Subjects: subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences

description: A class of inhomogeneous nonlinear Schrödinger equations (NLS), claiming to be novel integrable systems with rich properties continues appearing in PhysRev and PRL. All such equations are shown to be not new but equivalent to the standard NLS, which trivially explains their integrability features.
description: 6 pages, latex
Rekontextualisierung von Sammlungsobjekten.
Creators: name: Klemm, Caren
Publisher: name: Humboldt-Universität zu Berlin
Year: 2021
Subjects: subject: Niederrheinische Irdenware
subject: Sprache der Objekte
subject: Medium:Keramik
subject: 930 Geschichte des Altertums bis ca. 499, Archäologie

description: Das Projekt „Medium:Keramik“, das als Teilprojekt in die BMBF-Förderlinie „Sprache der Objekte“ eingebettet ist, befasst sich vor allem mit dem rheinländischen Steinzeug und der bleiglasierten Irdenware des Niederrheins in der Frühen Neuzeit und untersucht dieses keramische Material auf seine politischen, sozialen und ökonomischen Kontexte. Die Dissertation „Die bleiglasierte Irdenware am Niederrhein in der Frühen Neuzeit“ (Arbeitstitel) beschäftigt sich mit einer großen Sammlung dieser Ware. Ziel der Arbeit ist es, die keramischen Objekte der Sammlung „Haus Baaken“ nicht nur unter Einbeziehung von frühneuzeitlichen Schriftquellen und literarischen Texten, sondern besonders vor dem Hintergrund der tatsächlich erhaltenen Objekte der materiellen Kultur des 18. Jahrhunderts zu identifizieren, zu klassifizieren und in ihren kulturhistorischen Zusammenhang einzugliedern. Im Blickpunkt des Projekts steht zudem die Erforschung der Funktion dieser Güter hinsichtlich des ikonographischen Kontexts innerhalb der frühneuzeitlichen Lebenswelt sowie ihres Bedeutungswertes. In diesem Beitrag werden einige vorläufige Überlegungen und Ergebnisse zu diesen Untersuchungen mithilfe des im Profil dargestellten Vogels im Zentrum der keramischen Waren in unterschiedlichen gesellschaftlichen Gruppierungen dargestellt. Das Motiv ist weit verbreitet, variiert in seiner gesamten Komposition und kann somit auch in andere weitreichende Analysen chronologischer und ökonomischer Natur einbezogen werden.
Existence of weak solutions for general nonlocal and nonlinear second-order parabolic equations
Creators: name: Barles, Guy
name: Cardaliaguet, Pierre
name: Ley, Olivier
name: Monteillet, Aurélien
Publisher: name: arXiv
Year: 2008
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 49L25, 35F25, 35K65, 35A05, 35D05, 45G10, 47H10

description: In this article, we provide existence results for a general class of nonlocal and nonlinear second-order parabolic equations. The main motivation comes from front propagation theory in the cases when the normal velocity depends on the moving front in a nonlocal way. Among applications, we present level-set equations appearing in dislocations' theory and in the study of Fitzhugh-Nagumo systems.
Holistic Processing of Faces and Words Predicts Reading Accuracy and Speed in Dyslexic Readers
Creators: name: Brady, Nuala
Publisher: name: figshare
Year: 2021
Subjects: subject: 170112 Sensory Processes, Perception and Performance
subject: FOS: Psychology

description: data to accompany Holistic Processing of Faces and Words Predicts Reading Accuracy and Speed in Dyslexic Readersaccepted for publicaiton in PLOS
The outskirts of Cygnus OB2
Creators: name: Comeron, F.
name: Pasquali, A.
name: Figueras, F.
name: Torra, J.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We investigate the possible existence of an extended halo of early-type stars around Cygnus OB2, which is hinted at by near-infrared color-color diagrams, and its relationship to Cygnus OB2 itself, as well as to the nearby association Cygnus OB9 and to the star forming regions in the Cygnus X North complex. A total of 96 early-type stars are identified in the targeted region, which amounts to nearly half of the observed sample. Most of them have featureless near-infrared spectra as expected from OB stars at the available resolution. Another 18 stars that display Brackett emission lines can be divided between evolved massive stars (most likely Be stars) and Herbig Ae/Be stars based on their infrared excesses. A component associated with Cygnus OB9/NGC 6910 is clearly identified, as well as an enhancement in the surface density of early-type stars at Cygnus X North. We also find a field population, consisting largely of early B giants and supergiants, which is probably the same as identified in recent studies of the inner 1-degree circle around Cygnus OB2. The age and large extension of this population discards a direct relationship with Cygnus OB2 or any other particular association. Earlier claims of the possible large extent of Cygnus OB2 beyond its central, very massive aggregate seem to be dismissed by our findings. The existence of a nearly ubiquitous population of evolved stars with massive precursors suggests a massive star formation history in Cygnus having started long before the formation of the currently observed OB associations in the region.
description: 22 pages, 12 figures. Accepted by Astronomy and Astrophysics
Precise Determinations of the Charm Quark Mass
Creators: name: Steinhauser, Matthias
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In this contribution two recent analyses for the extraction of the charm quark mass are discussed. Although they rely on completely different experimental and theoretical input the two methods provide the same final results for the charm quark mass and have an uncertainty of about 1%.
description: 8 pages, 3 figures, to appear in the proceedings of Continuous Advances in QCD (CAQCD-08)