cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
New detectors for the kaon and hypernuclear experiments with KaoS at MAMI and with PANDA at GSI
Creators: name: Achenbach, P.
name: Gayoso, C. Ayerbe
name: Böhm, R.
name: Distler, M. O.
name: Friedrich, J.
name: Krygier, K. W.
name: Merkel, H.
name: Müller, U.
name: Neuhausen, R.
name: Nungesser, L.
name: Pochodzalla, J.
name: Lorente, A. Sanchez
name: Majos, S. Sánchez
name: Walcher, Th.
name: Gerl, J.
name: Kavatsyuk, M.
name: Kojouhavorv, I.
name: Saito, N.
name: Saito, T. R.
name: Schaffner, H.
name: Bressani, T.
name: Bufalino, S.
name: Feliciello, A.
name: Pantaleo, A.
name: Palomba, M.
name: Raciti, G.
name: Sfienti, C.
name: Agnello, M.
name: Ferro, F.
name: Iazzi, F.
name: Szymanska, K.
name: Tegnér, P. -E.
name: Cederwall, B.
name: Majling, L.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: The KaoS spectrometer at the Mainz Microtron MAMI, Germany, is perceived as the ideal candidate for a dedicated spectrometer in kaon and hypernuclei electroproduction. KaoS will be equipped with new read-out electronics, a completely new focal plane detector package consisting of scintillating fibres, and a new trigger system. First prototypes of the fibre detectors and the associated new front-end electronics are shown in this contribution. The Mainz hypernuclei research program will complement the hypernuclear experiments at the planned FAIR facility at GSI, Germany. At the proposed antiproton storage ring the spectroscopy of double Lambda hypernuclei is one of the four main topics which will be addressed by the PANDA Collaboration. The experiments require the operation of high purity germanium (HPGe) detectors in high magnetic fields (B= 1T) in the presence of a large hadronic background. The performance of high resolution Ge detectors in such an environment has been investigated.
description: Presentation at International Symposium on the Development of Detectors for Particle, Astroparticle and Synchrotron Radiation Experiments, Stanford, Ca (SNIC06), 6 pages, LaTeX, 11 eps figures
Second language writers’ processes, performance and perceptions in ESL Composition : Case studies of Japanese students
Creators: name: Hayward, Lynda Joyce
Publisher: name: University of British Columbia
Year: 2009

description: This study describes the products, processes and perceptions of Japanese ESL students with varying degrees of writing expertise in their L1 as they engaged in English composition tasks. Case studies were impressionistically chosen from profiles which included the writers' range of experience in L1 writing, their attitude toward L1 writing, their self-ratings of their L1 writing ability and holistically assessed samples of their L1 writing. Of the six chosen, three had relatively strong backgrounds in Japanese writing; three did not. Writers were observed across two ESL compositions tasks — a description and an argument. Written products were holistically assessed using the ESL Composition Profile (Jacobs, Zinkgraf, Wormuth, Hartfiel and Hughey, 1981). Protocols of the writers' "thinking-aloud" during composing sessions and retrospective interviews held immediately afterward yielded qualitative data concerning the types of processes - which writers engaged in as they composed. Descriptions of the writers' perceptions of the task demands and their previous writing instruction in Japanese and English (L2) are considered in interpreting the findings. On the first task (the argument), writers with more LI writing expertise performed better than writers with less expertise in L1 writing; on the second task (the description), they performed better than two of the three less expert L1 writers. Better performance of the stronger L1 writers was observed across all categories of the ESL Composition profile: content, organization, language use, vocabulary and mechanics. Process data showed that stronger L1 writers exhibited more control over the planning of their texts. Their "think-aloud" protocols were more often done in English and generally provided a richer source of data than those of less proficient L1 writers. No correspondence was found between second language proficiency, according to either measure, and written products or writing processes. Data from interviews held with the writers suggested that they had received little explicit writing instruction in L1 or L2. Writers appeared to lack familiarity with various modes of English discourse organization which led them to view the task demands as similar.
Stronger Violation of Local Theories with Equalities
Creators: name: Movahhedian, Hossein
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Bell type inequalities are used to test local realism against quantum theory.In this paper, we consider a two party system with two settings and two possible outcomes on each side, and derive equalities in local theories which are violated by quantum theory by a factor of 1.522 tolerating 0.586 fraction of white noise admixture which is twice that of the previous results.
description: 8 pages, RevTeX4
On the Possibility of Identification of a Short/Hard Burst GRB 051103 with the Giant Flare from a Soft Gamma Repeater in the M81 Group of Galaxies
Creators: name: Frederiks, D. D.
name: Pal'shin, V. D.
name: Aptekar', R. L.
name: Golenetskii, S. V.
name: Cline, T. L.
name: Mazets, E. P.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The light curve, energy characteristics, and localization of a short/hard GRB 051103 burst are considered. Evidence in favor of identifying this event with a giant flare from a soft gamma repeater in the nearby M81 group of interacting galaxies is discussed.
description: 11 pages, 4 figures, accepted for publication in Astronomy Letters, correction of a typo on page 3
Where is String Theory?
Creators: name: Guerrieri, Andrea
name: Penedones, Joao
name: Vieira, Pedro
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We use the S-matrix bootstrap to carve out the space of unitary, crossing symmetric and supersymmetric graviton scattering amplitudes in ten dimensions. We focus on the leading Wilson coefficient $α$ controlling the leading correction to maximal supergravity. The negative region $α<0$ is excluded by a simple dual argument based on linearized unitarity (the desert). A whole semi-infinite region $α\gtrsim 0.14$ is allowed by the primal bootstrap (the garden). A finite intermediate region is excluded by non-perturbative unitarity (the swamp). Remarkably, string theory seems to cover all (or at least almost all) the garden from very large positive $α$ -- at weak coupling -- to the swamp boundary -- at strong coupling.
description: 3 pages + appendices, 9 figures. v2 with improved data, 1 figure added, 1 appendix added. The submission contains the Mathematica notebook used for the fit analysis and a .txt file with the data
Διαδικασία σύνταξης προκαταρκτικού Κτηματογραφικού υποβάθρου και οι μεταβολές που υφίσταται από τη συλλογή των πληροφοριών στο στάδιο της Κτηματογράφησης
Creators: name: Παυλίδου, Σοφία Ιορδάνη
Publisher: name: Aristotle University of Thessaloniki
Year: 2018
Subjects: Προκαταρκτικό κτηματογραφικό υπόβαθρο
Νομική και χωρική πληροφορία
Εντοπισμός ακινήτων
Preliminary cadastral background
Legal and spatial information
Property location

description: Ένα από τα βασικότερα στάδια της μελέτης κτηματογράφησης είναι η σύνταξη προκαταρκτικού κτηματογραφικού υποβάθρου. Πρόκειται για μια επίπονη διαδικασία που απαιτεί τη συλλογή τεράστιου όγκου δεδομένων. Σημαντική προϋπόθεση για την επιτυχή υλοποίηση του εγχειρήματος, είναι ο συνδυασμός διοικητικών, νομικών και τεχνικών διαδικασιών καθώς και η συνεργασία όλων των διαφορετικών επιστημονικών εξειδικεύσεων με σκοπό την επαρκή αντιμετώπιση των προβλημάτων καθώς και την ανταπόκριση στις απαιτήσεις που προκύπτουν. Στο πλαίσιο αυτό, η μορφή του κτηματογραφικού υποβάθρου δεν παγιώνεται μετά την περαίωση όλων των διαδικασιών που αναφέρθηκαν αλλά αποτελεί ένα δυναμικό εργαλείο για την κτηματογράφηση με μεταβαλλόμενη μορφή. Στην παρούσα διπλωματική εργασία επιχειρείται ο εντοπισμός, η περιγραφή, η ανάλυση και η αξιολόγηση των βασικών πτυχών του προκαταρκτικού κτηματογραφικού υποβάθρου, περιγράφονται οι μεταβολές που υφίσταται από την επεξεργασία των δηλώσεων ιδιοκτησίας των δικαιούχων και τέλος, διατυπώνονται προτάσεις για τη βελτίωση των παραπάνω διαδικασιών. Το συμπέρασμα που προκύπτει από την ανάλυση είναι ότι η ορθή σύνταξη του προκαταρκτικού κτηματογραφικού υποβάθρου θα αναβαθμίσει αποτελεσματικά τις υπηρεσίες διαχείρισης των γεωχωρικών δεδομένων προς όφελος του πολίτη, του δημοσίου και των επενδύσεων
description: One of the main stages of a cadastral survey is the development of the preliminary cadastral background. That development is a difficult procedure which requires the collection of a huge amount of data. The combination of administrative, legal and technical procedures consists an important condition of the successful implementation of the task, as well as the collaboration of all different scientific specializations in order to deal adequately with all kind of problems and correspond to the upcoming demands. In this context, the form of the cadastral background is not fixed after the end of the above mentioned procedures but it consists a dynamic tool for the cadastral survey with changing form. In this dissertation, the localization, description, analysis and evaluation of the key aspects of the preliminary cadastral background are being attempted, the transformations, after processing the ownership declarations submitted, are described and, finally, suggestions are made for the amelioration of the above mentioned procedures. The conclusion, coming up from the analysis, is that the right development of the preliminary cadastral background will upgrade effectively the geospacial data management services to the benefit of the citizens, the state and of investments
Resonant pairing between Fermions with unequal masses
Creators: name: Wu, S. -T.
name: Pao, C. -H.
name: Yip, S. -K.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We study the pairing between Fermions of different masses, especially at the unitary limit. At equal populations, the thermodynamic properties are identical with the equal mass case provided an appropriate rescaling is made. At unequal populations, for sufficiently light majority species, the system does not phase separate. For sufficiently heavy majority species, the phase separated normal phase have a density larger than that of the superfluid. For atoms in harmonic traps, the density profiles for unequal mass Fermions can be drastically different from their equal-mass counterparts.
description: 10 pages, 4 figures
Comment on Coleman-DeLuccia Instantons
Creators: name: Banks, Tom
name: Zhang, Bingnan
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We complete an old argument that causal diamonds in the crunching region of the Lorentzian continuation of a Coleman-Deluccia instanton for transitions out of de Sitter space have finite area, and provide quantum models consistent with the principle of detailed balance, which can mimic the instanton transition probabilities for the cases where this diamond is larger or smaller than the causal patch of de Sitter space. We review arguments that potentials which do not have a positive energy theorem when the lowest de Sitter minimum is shifted to zero, may not correspond to real models of quantum gravity.
Quantum states for Heisenberg-limited interferometry
Creators: name: Uys, H.
name: Meystre, P.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The phase resolution of interferometers is limited by the so-called Heisenberg limit, which states that the optimum phase sensitivity is inversely proportional to the number of interfering particles N, a 1/sqrt{N} improvement over the standard quantum limit. We have used simulated annealing, a global optimization strategy, to systematically search for quantum interferometer input states that approach the Heisenberg limited uncertainty in estimates of the interferometer phase shift. We compare the performance of these states to that of other non-classical states already known to yield Heisenberg limited uncertainty.
description: Published version, Updated discussion on N00N states, 11 pages, 6 figures
Linking preprints to published papers - how good is your metadata? (spoiler: it's complicated)
Creators: name: Kramer, Bianca
Publisher: name: Zenodo
Year: 2021
Subjects: preprints
metadata
Crossref
COVID-19
DataCite

description: Presentation at PIDapalooza 2021 (https://www.pidapalooza.org)

 Crossref notifies preprint servers of potential matches with published articles. It requires preprint servers to verify the links and add them to the metadata record of the preprint, but uptake of this varies across preprint services.

 Using a collection of COVID-19 related preprints from over 15 different preprint servers (itself collected through Crossref), I looked at how many of these have links to published journal articles. I compared this to information on preprint servers themselves, and also look at differences between preprints servers (regional, disciplinary, publisher-linked) in percentage of preprints linked to journal articles, time-to-publication, and the 'destination' of preprints.

 The results are as much a reflection on the uptake of metadata linking as on the actual rate of preprints that get published as journal articles. As such, they are a call to action to publishers and preprint servers to include these links in their metadata and thereby help improve the scholarly record.

 Code and data for most figures are available on GitHub: https://github.com/bmkramer/covid19_preprints_published
 A live version of this presentation (in Google Slides) is available at https://tinyurl.com/pidapalooza2021-preprints
Lexical and syntactic gemination in Italian consonants -- Does a geminate Italian consonant consist of a repeated or a strengthened consonant?
Creators: name: Di Benedetto, Maria Gabriella
name: Shattuck-Hufnagel, Stefanie
name: De Nardis, Luca
name: Budoni, Sara
name: Arango, Javier
name: Chan, Ian
name: DeCaprio, Alec
Publisher: name: arXiv
Year: 2021
Subjects: subject: Audio and Speech Processing (eess.AS)
subject: Sound (cs.SD)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: Two types of consonant gemination characterize Italian: lexical and syntactic. Italian lexical gemination is contrastive, so that two words may differ by only one geminated consonant. In contrast, syntactic gemination occurs across word boundaries, and affects the initial consonant of a word in specific contexts, such as the presence of a monosyllabic morpheme before the word. This study investigates the acoustic correlates of Italian lexical and syntactic gemination, asking if the correlates for the two types are similar in the case of stop consonants. Results confirmed previous studies showing that duration is a prominent gemination cue, with a lengthened consonant closure and a shortened pre-consonant vowel for both types. Results also revealed the presence, in about 10-12% of instances, of a double stop-release burst, providing strong support for the biphonematic nature of Italian geminated stop consonants. Moreover, the timing of these bursts suggests a different planning process for lexical vs. syntactic geminates. The second burst, when present, is accommodated within the closure interval in syntactic geminates, while lexical geminates are lengthened by the extra burst. This suggests that syntactic gemination occurs during a post-lexical phase of production planning, after timing has already been established.
description: Under revision at The Journal of the Acoustical Society of America
The nature of the nearest compact group of galaxies from precise distance measurements
Creators: name: Mamon, Gary A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Compact groups (CGs) of galaxies, similar to those catalogued by Hickson, appear to be the densest galaxy structures in the Universe. Redshift information is insufficient to determine whether a CG is roughly as dense in 3D as it appears in projection, or whether it is caused by a chance alignment (CA) along the line of sight within a larger galaxy system. Recent precise distance measurements help probe the nature of the nearest CG, situated in the Virgo cluster, whose dominant member is M60. The isolated status of the CG is reassessed with recent photometry and a statistical analysis is performed on the surface brightness fluctuation (SBF) distances measured by Mei et al. in Virgo, for 4 of the 5 CG members. The neighboring galaxy NGC 4606 appears (with 80-90% confidence) to be too faint to affect the isolated status of the CG. Taken at face value, the SBF distances suggest that M59 and NGC 4660 lie roughly 2 Mpc to the foreground of M60, NGC 4638, and the bulk of the Virgo cluster. The statistical analysis confirms that the CG is, indeed, the result of a CA of its galaxies, with NGC 4638 lying at least 800 kpc further away (with 99% confidence) than either M59 or NGC 4660. The first two galaxy distances are consistent with M59 and NGC 4660 constituting a tight pair. The dominant galaxy, M60, is at least 440 kpc more distant (95% confidence) than the M59+NGC 4660 pair, and over 1 Mpc (99% confidence) more distant if one uses the broken linear calibration of the SBF distances. This work constitutes the first direct analysis of the nature of a compact group of galaxies. CAs of galaxies represent a realistic alternative to truly dense groups to explain the nature of CGs. With current SBF distance accuracies, one could determine the nature of HCG 68 in the same way.
description: 5 pages, 4 figures, accepted as Research Note in A&A, final version with corrected English
Probing the Low-Luminosity XLF in Normal Elliptical Galaxies
Creators: name: Kim, D. -W.
name: Fabbiano, G.
name: Kalogera, V.
name: King, A. R.
name: Pellegrini, S.
name: Trinchieri, G.
name: Zepf, S. E.
name: Zezas, A.
name: Angelini, L.
name: Davies, R. L.
name: Gallagher, J. S.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present the first low luminosity (LX > 5 - 10 1036 erg s-1) X-ray luminosity functions (XLFs) of low-mass X-ray binaries (LMXBs) determined for two typical old elliptical galaxies, NGC 3379 and NGC 4278. Because both galaxies contain little diffuse emission from hot ISM and no recent significant star formation (hence no high-mass X-ray binary contamination), they provide two of the best homogeneous sample of LMXBs. With 110 and 140 ks Chandra ACIS S3 exposures, we detect 59 and 112 LMXBs within the D25 ellipse of NGC 3379 and NGC 4278, respectively. The resulting XLFs are well represented by a single power-law with a slope (in a differential form) of 1.9 0.1. In NGC 4278, we can exclude the break at LX ~ 5 x 1037 erg s-1 that was recently suggested to be a general feature of LMXB XLFs. In NGC 3379 instead we find a localized excess over the power law XLF at ~4 x 1037 erg s-1, but with a marginal significance of ~1.6s. Because of the small number of luminous sources, we cannot constrain the high luminosity break (at 5 x 1038 erg s-1) found in a large sample of early type galaxies. While the optical luminosities of the two galaxies are similar, their integrated LMXB X-ray luminosities differ by a factor of 4, consistent with the relation between the X-ray to optical luminosity ratio and the globular cluster specific frequency.
description: 18 pages, 6 figures, submitted to ApJ
Οι Τεχνολογίες της Πληροφορίας και των Επικοινωνιών στη διδασκαλία της λογοτεχνίας: Μελέτη των διδακτικών σεναρίων λογοτεχνίας για την πρωτοβάθμια εκπαίδευση του διαδικτυακού τόπου «Πρωτέας» του Κέντρου Ελληνικής γλώσσας
Creators: name: Αλεξοπούλου, Μαρία Γεωργίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2018
Subjects: Λογοτεχνία
Τεχνολογίες της Πληροφορίας και των Επικοινωνιών (ΤΠΕ)
Σενάριο διδασκαλίας
Βάση δεδομένων «Πρωτέας»
Literature
Information and Communications Technologies (ICT)
Teaching scenario
Proteas’ database

description: Η παρούσα εργασία επιχειρεί να διερευνήσει τη χρησιμότητα των Τεχνολογιών της Πληροφορίας και των Επικοινωνιών (ΤΠΕ) στο μάθημα της λογοτεχνίας, εξετάζοντας τον ρόλο που αποδίδεται στις ΤΠΕ στα σενάρια διδασκαλίας της λογοτεχνίας για την πρωτοβάθμια εκπαίδευση του διαδικτυακού τόπου «Πρωτέας» του Κέντρου Ελληνικής Γλώσσας. Στο πλαίσιο αυτό, αναλύεται το περιεχόμενο 20 σεναρίων λογοτεχνίας για την πρωτοβάθμια εκπαίδευση σε σχέση με τις ΤΠΕ και συγκεκριμένα, σε σχέση με το είδος των ψηφιακών εργαλείων που προτείνονται, τον τρόπο αξιοποίησής τους στις δραστηριότητες και τη συμβολή της χρήσης τους στον εμπλουτισμό του μαθήματος της λογοτεχνίας. Τα αποτελέσματα της ανάλυσης δείχνουν πως στα σενάρια προτείνεται μια ποικιλία ψηφιακών εργαλείων και η χρήση τους υλοποιεί ποικίλους σκοπούς του μαθήματος, ενώ υπάρχουν περιθώρια για περαιτέρω ανάπτυξη των χρήσεων των ΤΠΕ σε ορισμένους τομείς της διδασκαλίας. Η συνεισφορά των ΤΠΕ κρίνεται, επομένως, ουσιαστική, καθώς διευρύνει και εμβαθύνει τις δυνατότητες διδασκαλίας της λογοτεχνίας για να επιτευχθούν οι σκοποί της.
description: The present study attempts to explore the usefulness of Information and Communications Technologies (ICT) in the literature lesson by examining the role of ICT in the teaching scenarios for literature in elementary school on the website "Proteas" of the Centre for Greek Language. To that end, 20 teaching scenarios for literature in elementary school are analyzed in relation to ICT, focusing specifically on the type of ICT tools they propose, the ways these tools are used in the activities and the contribution of their use to the enrichment of the literature lesson. The results of the analysis show that a variety of ICT tools are proposed in the scenarios and their use implements various objectives of the course, while there is room for further development of the uses of ICT in some areas of teaching. Therefore, the contribution of ICT is substantial as it broadens and deepens the possibilities of teaching to achieve its goals
Quantum Information and the Mind-Body Problem
Creators: name: Vaughan, Martin Paul
Publisher: name: arXiv
Year: 2021
Subjects: subject: History and Philosophy of Physics (physics.hist-ph)
subject: FOS: Physical sciences

description: The mind-body problem is reviewed in the context of a non-technical account of quantum information theory. The importance of clearly defining: `what is physical?' is highlighted, since only then can we give meaning to the concept `non-physical'. Physicality is defined in terms of interaction, which is in turn defined to be a correlated exchange of information. This is asserted to be the basis of any meaningful concept of epistemology. Hence, it is argued that a non-physical entity can not `know' anything about the world. Information transfer is then discussed in terms of quantum entanglement and an argument for our perception of time is presented. It is then contended that the notion of `mind' may be meaningfully discussed in the context of a quantum theoretic framework.
description: 33 pages, 9 figures
Maximum entropy approach to power-law distributions in coupled dynamic-stochastic systems
Creators: name: Vakarin, E. V.
name: Badiali, J. P.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: Statistical properties of coupled dynamic-stochastic systems are studied within a combination of the maximum information principle and the superstatistical approach. The conditions at which the Shannon entropy functional leads to a power-law statistics are investigated. It is demonstrated that, from a quite general point of view, the power-law dependencies may appear as a consequence of "global" constraints restricting both the dynamic phase space and the stochastic fluctuations. As a result, at sufficiently long observation times the dynamic counterpart is driven into a non-equilibrium steady state whose deviation from the usual exponential statistics is given by the distance from the conventional equilibrium.
Unifying two views on multiple mean-payoff objectives in Markov decision processes
Creators: name: Chatterjee, Krishnendu
name: Komarkova, Zuzana
name: Kretinsky, Jan
Publisher: name: IST Austria
Year: 2015
Subjects: 000 Computer science, knowledge & general works

description: We consider Markov decision processes (MDPs) with multiple limit-average (or mean-payoff) objectives. There have been two different views: (i) the expectation semantics, where the goal is to optimize the expected mean-payoff objective, and (ii) the satisfaction semantics, where the goal is to maximize the probability of runs such that the mean-payoff value stays above a given vector. We consider the problem where the goal is to optimize the expectation under the constraint that the satisfaction semantics is ensured, and thus consider a generalization that unifies the existing semantics. Our problem captures the notion of optimization with respect to strategies that are risk-averse (i.e., ensures certain probabilistic guarantee). Our main results are algorithms for the decision problem which are always polynomial in the size of the MDP. We also show that an approximation of the Pareto-curve can be computed in time polynomial in the size of the MDP, and the approximation factor, but exponential in the number of dimensions. Finally, we present a complete characterization of the strategy complexity (in terms of memory bounds and randomization) required to solve our problem.
Why quantum dynamics is linear
Creators: name: Jordan, Thomas F.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Quantum dynamics is linear. How do we know? From theory or experiment? The history of this question is reviewed. Nonlinear generalizations of quantum mechanics have been proposed. They predict small but clear nonlinear effects, which very accurate experiments have not seen. Is there a reason in principle why nonlinearity is not found? Is it impossible? Does quantum dynamics have to be linear? Attempts to prove this have not been decisive, because either their assumptions are not compelling or their arguments are not conclusive. The question has been left unsettled. There is a simple answer, based on a simple assumption. It was found in two steps separated by 44 years. They are steps back to simpler and more compelling assumptions. A proof of the assumptions of the Wigner-Bargmann proof has been known since 1962. It assumes that the maps of density matrices in time are linear. For this step, it is also assumed that density matrices are mapped one-to-one onto density matrices. An alternative is to assume that pure states are mapped one-to-one onto pure states and that entropy does not decrease. In a step taken in 2006, it is proved that the maps of density matrices in time are linear. It is assumed, as in the earlier step, that at each time the physical quantities and states are described by the usual linear structures of quantum mechanics, so the question is only about how things change in time. Beyond that, the proof assumes only that the dynamics does not depend on anything outside the system, but must allow the system to be described as part of a larger system.
description: From talks, 15 pages
Data-centric dynamic partial order reduction
Creators: name: Chalupa, Marek
name: Chatterjee, Krishnendu
name: Pavlogiannis, Andreas
name: Sinha, Nishant
name: Vaidya, Kapil
Publisher: name: IST Austria
Year: 2017
Subjects: 000 Computer science, knowledge & general works

description: We present a new dynamic partial-order reduction method for stateless model checking of concurrent programs. A common approach for exploring program behaviors relies on enumerating the traces of the program, without storing the visited states (aka stateless exploration). As the number of distinct traces grows exponentially, dynamic partial-order reduction (DPOR) techniques have been successfully used to partition the space of traces into equivalence classes (Mazurkiewicz partitioning), with the goal of exploring only few representative traces from each class. We introduce a new equivalence on traces under sequential consistency semantics, which we call the observation equivalence. Two traces are observationally equivalent if every read event observes the same write event in both traces. While the traditional Mazurkiewicz equivalence is control-centric, our new definition is data-centric. We show that our observation equivalence is coarser than the Mazurkiewicz equivalence, and in many cases even exponentially coarser. We devise a DPOR exploration of the trace space, called data-centric DPOR, based on the observation equivalence. 1. For acyclic architectures, our algorithm is guaranteed to explore exactly one representative trace from each observation class, while spending polynomial time per class. Hence, our algorithm is optimal wrt the observation equivalence, and in several cases explores exponentially fewer traces than any enumerative method based on the Mazurkiewicz equivalence. 2. For cyclic architectures, we consider an equivalence between traces which is finer than the observation equivalence; but coarser than the Mazurkiewicz equivalence, and in some cases is exponentially coarser. Our data-centric DPOR algorithm remains optimal under this trace equivalence. Finally, we perform a basic experimental comparison between the existing Mazurkiewicz-based DPOR and our data-centric DPOR on a set of academic benchmarks. Our results show a significant reduction in both running time and the number of explored equivalence classes.
Tidal radii and escape speeds in dwarf spheroidal galaxies under MOND and dark halos compared
Creators: name: Sanchez-Salcedo, F. J.
name: Hernandez, X.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We investigate the success and problems of MOdified Newtonian Dynamics (MOND) in explaining the structural parameters and dynamics of remote Galactic globular clusters (GCs) and dwarf spheroidal (dSph) galaxies. Using the MOND value for the mass of the Milky Way as inferred from the Galactic rotation curve, we derive the tidal radii of Galactic GCs, and compare to observed values. Except for Pal 14, the predicted tidal radii of GCs are systematically larger than the observed nominal values. However, the associated uncertainties are so large that tidal radii are consistent on the $1σ$ level. We have considered the importance of the Galactic tidal force on the survival of dSphs under MOND. Assuming mass-to-light ratios compatible with a naked stellar population, we found that the present Galactic dSphs preserve their integrity over one Hubble time, except Sextans which may survive the tidal interaction only for several Gyr. Mass-to-light ratios as inferred from the internal kinematics of dSph galaxies can be used, but they appear too large to be accounted for only by the stellar population in Willman 1, Coma Berenice, Ursa Minor, Draco, Ursa Major and possibly Boötes dwarves. Finally, the ability of the Sculptor dwarf to retain the observed population of low-mass X-ray binaries (LMXBs) is examined. Under the MOND paradigm, we find that the retention fraction in Sculptor is likely not larger than a few percent. Compared to the dark matter scenario, it turns out that MOND makes the retention problem worse. We propose that measurements of the radial velocities of the observed LMXBs in Sculptor could provide a way to distinguish between modified gravities or extended and massive dark matter halos.
description: 14 pages, including 3 figures and 1 table. Revised version accepted for publication at ApJ, clarified presentation, and dSph list updated to a month ago
AC-Tolerant Multifilament Coated Conductors
Creators: name: Levin, G. A.
name: Barnes, P. N.
name: Amemiya, N.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We report the magnetization losses in an experimental multifilament coated conductor. A 4 mm wide and 10 cm long YBCO coated conductor was subdivided into eight 0.5 mm wide filaments by laser ablation and subjected to post-ablation treatment. As the result, the hysteresis loss was reduced, as expected, in proportion to the width of the filaments. However, the coupling loss was reduced dramatically, and became practically negligible, in the range of a sweep rate up to 20 T/s. This represents a drastic improvement on previous multifilament conductors in which often the coupling losses became equal to the hysteresis loss at a sweep rate as low as 3-4 T/s. These results demonstrate that there is an effective and practical way to suppress coupling losses in coated multifilament conductors.
description: This paper is based on a talk given at 2006 Applied Superconductivity Conference in Seattle, WA (August 27-September 1, 2006). To be published in IEEE Trans. Appl. Superconductivity
Η σχέση γλωσσικής και λογοτεχνικής διδασκαλίας στα διδακτικά σενάρια για την πρωτοβάθμια εκπαίδευση του διαδικτυακού τόπου «Πρωτέας» του Κέντρου Ελληνικής Γλώσσας
Creators: name: Κισοπούλου, Ελένη Νικολάου
Publisher: name: Aristotle University of Thessaloniki
Year: 2017
Subjects: Γλωσσική διδασκαλία
Λογοτεχνική διδασκαλία
Προγράμματα σπουδών
Οπτικός γραμματισμός
Πολυγραμματισμοί
Language teaching
Literature teaching
Curricula
Visual literacy
Multiliteracies

description: Η παρούσα ερευνητική εργασία αφορά τη μελέτη των διδακτικών σεναρίων που παρατίθενται για το μάθημα της λογοτεχνίας στον διαδικτυακό τόπο «Πρωτέας» του Κέντρου Ελληνικής Γλώσσας με στόχο τη διαπίστωση της σχέσης που αναπτύσσεται μεταξύ της γλωσσικής και λογοτεχνικής διδασκαλίας. Η ανάπτυξη της μεθοδολογίας της έρευνας αφορά την εξέταση των στόχων οι οποίοι τίθενται στα σενάρια, των προτεινόμενων προς υλοποίηση δραστηριοτήτων από τους μαθητές καθώς και των κειμένων που προορίζονται για ανάγνωση. Τα αποτελέσματα της διερεύνησης αυτής καθιστούν σαφές πως στους στόχους των σεναρίων υπερισχύουν οι γλωσσικοί στόχοι έναντι των λογοτεχνικών. Ως προς τις δραστηριότητες καθώς και τα προς ανάγνωση κείμενα, διαφάνηκε πως η πλειοψηφία αυτών, και στις δύο περιπτώσεις, ήταν λογοτεχνικά προσανατολισμένη. Επίσης, έγινε φανερό πως στα σενάρια τα οποία σχεδιάστηκαν με βάση το Νέο Πρόγραμμα Σπουδών για τη Διδασκαλία της Νεοελληνικής Γλώσσας και της Λογοτεχνίας στο Δημοτικό Σχολείο δεν εντοπίζονται ίχνη γλωσσικής διδασκαλίας, ενώ στα σενάρια που βασίζονται στο Διαθεματικό Ενιαίο Πλαίσιο Προγράμματος Σπουδών καθώς και το Αναλυτικό Πρόγραμμα Σπουδών της Ελληνικής Γλώσσας για το Δημοτικό Σχολείο εντοπίζονται κατάλοιπα γλωσσικής διδασκαλίας. Τελικά, όλα τα υπό μελέτη σενάρια προωθούν σε μεγάλο βαθμό την καλλιέργεια του οπτικού γραμματισμού και των πολυγραμματισμών.
description: The aim of the present paper is the examination of the educational scenarios that are provided by the website “Proteas” of the Greek Language Centre for the literature lesson in order to be specified the kind of relationship between language and literature teaching. The development of the applied methodology concerns the examination of the teaching objectives that are included in the scenarios, as well as the suggested educational activities and the texts that are aimed to be read by the students. The results of this examination clarify that the language oriented objectives prevail quantitatively the literary objectives. Regarding the suggested educational activities and texts, it was ascertained that the majority of both of the two categories is literary oriented. It was also clarified that the scenarios that are designed in terms of the most recent curriculum have no traces of language teaching, whereas those that are designed under the guidelines of the former and more traditional curricula have residues of language teaching. Finally, all the examined scenarios promote the development of visual literacy and multiliteracies.
The effect of rotation on the spectrum of Vega
Creators: name: Yoon, Jinmi
name: Peterson, Deane M.
name: Zagarello, Robert J.
name: Armstrong, J. Thomas
name: Pauls, Thomas
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The discovery that Vega is a rapidly rotating pole-on star has raised a number of questions about this fundamental standard, including such issues as its composition, and in turn its mass and age. We report here a reanalysis of Vega's composition. A full spectral synthesis based on the Roche model derived earlier from NPOI interferometry is used. We find the line shapes in Vega's spectrum to be more complex than just flat-bottomed, which have been previously reported; profiles range from slightly self-reversed to simple ``V'' shapes. A high SNR spectrum, obtained by stacking spectra from the ELODIE archive, shows excellent agreement with the calculations, provided we add about 10 km/s of macroturbulence to the predicted spectra. From the abundance analysis, we find that Vega shows the peculiar abundance pattern of a \W Bootis star as previously suggested. We investigate the effects of rotation on the deduced abundances and show that the dominant ionization states are only slightly affected compared to analyses using non-rotating models. We argue that the rapid rotation requires the star be fully mixed. The composition leads to masses and particularly ages that are quite different compared to what are usually assumed.
description: 16 pages, 4 figures, accepted by ApJ
Συμβουλευτική Επαγγελματικού Προσανατολισμού εξ’ επόψεως Κοινωνιολογίας του Χριστιανισμού
Creators: name: Μπάρκα, Χρυσάνθη Νικολάου
Publisher: name: Aristotle University of Thessaloniki
Year: 2018
Subjects: Συμβουλευτική, Επαγγελματικός Προσανατολισμός
Κοινωνιολογία του Χριστιανισμού
Κλήση, Κλίση
Consultation, Vocational Orientation
Sociology of Christianism
Call, Vocation

description: Με την παρούσα εργασία επιχειρείται ο συγκερασμός των εννοιών της Συμβουλευτικής, του Προσανατολισμού, της Εργασίας και της Εκπαιδευτικής μέριμνας μέσα από τις επιστήμες της Θεολογίας, της Ψυχολογίας, της Κοινωνιολογίας και της Παιδαγωγικής. Μέσα από τη διερεύνηση βιβλιογραφικού υλικού (βιβλία, επιστημονικά άρθρα, μελέτες, θεολογικά κείμενα) παρουσιάζεται το εξαιρετικά ενδιαφέρον θέμα της Συμβουλευτικής Επαγγελματικού Προσανατολισμού, εξ επόψεως Κοινωνιολογίας του Χριστιανισμού. Το εν λόγω θέμα, αν και έχει μελετηθεί πολλάκις, αυτό έχει γίνει μεμονωμένα, είτε για τη Συμβουλευτική Επαγγελματικού Προσανατολισμού, είτε για την Κοινωνιολογία του Χριστιανισμού. Στην παρούσα εργασία παρουσιάζεται μια επικαιροποιημένη εκδοχή συνδυάζοντας δεδομένα των ανωτέρω επιστημονικών πεδίων. Με τον τρόπο αυτό διαφαίνεται στο παρόν πόνημα η εξελικτική τους πορεία καθώς και η σύνδεσή τους με τη σύγχρονη εποχή
description: With the present dissertation, the conflation of the concepts of Consultation, Orientation, Work and Educational concern is attempted through the sciences of Theology, Psychology, Sociology and Pedagogy. Through the investigation of the biographical material (books, scientific articles, studies, theological texts) the topic of Consultation of Vocational guidance is presented in the light of Sociology of Christianism. The said topic is of exceptional interest which although it has been an object of study repeatedly, it has happened individually, either concerning the Consultation of Vocational Guidance, or the Sociology of Christianism. In this dissertation, a revised version is presented combining the data of the scientific fields mentioned above. This way, their evolutionary process as well as their connection with the present day is obvious in this piece of writing
Engineering multiphoton states for linear optics computation
Creators: name: Aniello, Paolo
name: Lupo, Cosmo
name: Napolitano, Mario
name: Paris, Matteo G. A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Transformations achievable by linear optical components allow to generate the whole unitary group only when restricted to the one-photon subspace of a multimode Fock space. In this paper, we address the more general problem of encoding quantum information by multiphoton states, and elaborating it via ancillary extensions, linear optical passive devices and photodetection. Our scheme stems in a natural way from the mathematical structures underlying the physics of linear optical passive devices. In particular, we analyze an economical procedure for mapping a fiducial 2-photon 2-mode state into an arbitrary 2-photon 2-mode state using ancillary resources and linear optical passive N-ports assisted by post-selection. We found that adding a single ancilla mode is enough to generate any desired target state. The effect of imperfect photodetection in post-selection is considered and a simple trade-off between success probability and fidelity is derived.
Introduction to Open Science – How to practice science in an accessible, transparent and reusable way
Creators: name: Havemann, Jo
Publisher: name: Zenodo
Year: 2021
Subjects: Open Science, Open Access, Open Source

description: Research is increasingly expected to produce outcomes that are developed for and with society, that are well documented and accessible within and beyond a scientific community, and thus, respond to social challenges and make a real impact. Open Science is committed to ensuring that the entire research cycle shifts towards openness, thereby advancing good scientific practice. Its principles entail the themes Open Educational Resources (OER), Open Access (OA), Open Peer Review, Open Source, Open Methodology and Open Data.
Grammatical elicitation: Passive, person enclitic, and agent focus
Creators: name: Ramirez, Angela
name: Clem, Emily
name: Jung, Sihun
name: Lim, Jun Jie
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2023
Subjects: subject: mvj

description: Grammatical elicitation of passive constructions with verb 'kiss' (recording 1), 2nd person enclitic (recording 2), plural person paradigms (recording 3), and agent focus constructions (recordings 3, 4). Elicitation leaders: Jun Jie Lim (recordings 1, 2), Sihun Jung (recordings 3, 4)
Total cross sections and soft gluon resummation
Creators: name: Godbole, R. M.
name: Grau, A.
name: Pancheri, G.
name: Srivastava, Y. N.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We discuss a model for total hadronic and photonic cross-sections which includes hard parton-parton scattering to drive the rise and soft gluon resummation to tame it. Unitarity is ensured by embedding the cross-section in the eikonal formalism. Predictions for LHC and ILC are presented.
description: 9 pages, 2 figures, Presented at PLC2005, Kazimierz, September 2005, requires appolb.cls
Relationship between hemoglobin and grip strength in older adults: the ActiFE study
Creators: name: Hammer, Theresa
name: Braisch, Ulrike
name: Rothenbacher, Dietrich
name: Denkinger, Michael
name: Dallmeier, Dhayana
Publisher: name: Universität Ulm
Year: 2024
Subjects: subject: Grip strength
subject: Hemoglobin
subject: Iron status
subject: Ferritin
subject: Older adults
subject: DDC 610 / Medicine & health

description: Introduction Although anemia is associated with low muscle strength, hemoglobin has been rarely studied considering ferritin. Aim To analyze the association between hemoglobin and grip strength in community-dwelling older adults. Methods We used data from a German cohort of adults ≥ 65 years, excluding those with CRP > 10 mg/L or taking iron supplements. Grip strength (kg) was measured using a Jamar dynamometer. Analysis was performed using multiple linear regression, adjusted for established confounders. Due to interaction, age-stratified (< 80, 80 +), further sex-stratified analysis in those < 80 years old and ferritin-stratified in men < 80 years were performed. Results In total, 1294 participants were included in this analysis (mean age 75.5 years, 549 (42.3%) women, 910 (70.3%) < 80 years). On average, hemoglobin and grip strength were 14.9 g/dL and 41.3 kg for men, 13.9 g/dL and 25.1 kg for women. Hemoglobin was significantly positively associated with grip strength only among women < 80 years (β 0.923 [95% CI 0.196, 1.650]) . For men < 80 years, the association was significant when ferritin was ≥ 300 µg/L (β 2.028 [95% CI 0.910, 3.146]). No association was detected among those participants 80 + . Discussion and conclusions Our data show an association between hemoglobin and grip strength only in women < 80 years old. For men < 80 years, the association was only significant with ferritin levels ≥ 300 µg/L. Considering the decreasing levels of hemoglobin and grip strength and the high prevalence of iron deficiency in older adults further analyses investigating this relationship with more iron specific parameters such as transferrin saturation are warranted. © In Copyright http://rightsstatements.org/vocab/InC/1.0/