cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Calibrating an Interferometric Null
Creators: name: Lane, Benjamin F.
name: Muterspaugh, Matthew W.
name: Shao, Michael
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: One of the biggest challenges associated with a nulling interferometer-based approach to detecting extra-solar Earth-like planets comes from the extremely stringent requirements of pathlength, polarization and amplitude matching in the interferometer. To the extent that the light from multiple apertures are not matched in these properties, light will leak through the nuller and confuse the search for a planetary signal. Here we explore the possibility of using the coherence properties of the starlight to separate contributions from the planet and nuller leakage. We find that straightforward modifications to the optical layout of a nulling interferometer will allow one to measure and correct for the leakage to a high degree of precision. This nulling calibration relaxes the field matching requirements substantially, and should consequently simplify the instrument design.
description: 24 Pages, accepted for publication in ApJ
Additional file 1 of Clinical profile and outcome of acute organophosphate poisoning in children of Upper Egypt: a cross-sectional study
Creators: name: Baseer, Khaled A. Abdel
name: Gad, Eman Fathala
name: Raheem, Yaser F. Abdel
Publisher: name: figshare
Year: 2021
Subjects: subject: Medicine
subject: Neuroscience
subject: Sociology
subject: FOS: Sociology
subject: Immunology
subject: FOS: Clinical medicine
subject: Computational Biology

description: Additional file 1:. Questionnaire for data collection.
Σύζευξη διαμορφωτικής και συγκριτικής αξιολόγησης στα μαθηματικά με την τοποθέτηση των λαθών των μαθητών σε κλιμακα Rach
Creators: name: Κυριακίδης, Λεωνίδας
name: Τηλεμάχου, Κυριάκος
Publisher: name: Παιδαγωγική Επιθεώρηση
Year: 2015

description: The aim of the study reported in this paper was to identity the common errors made on tasks that are valued in high stakes assessment in primary mathematics in order to encourage diagnostic teaching. A test was administered to a representative sample of year 6 Cypriot primary pupils (n—802). The Rasch model was used and the data were analyzed by using the computer programme QUEST. A scale was created for the test and analyzed for reliability, fit to the model, meaning and validity. It was also analyzed separately for each of two groups (boys and girls) to test the invariance of the scale. Analysis of the data revealed that the test has satisfactory psychometric properties. Four levels of mathematical thinking were also identified. Moreover, a method was developed for positioning significant errors made by pupils on a Rasch scale. Thus, a diagnostic profile of performance by topic and level which may encourage diagnostic teaching was developed. The findings are discussed with reference to intended uses of the method of error analysis that we developed. The prospect of using national assessment to provide teachers with support for improving national standards is discussed.
description: Παιδαγωγική Επιθεώρηση, Vol. 37 (2004)
S-duality in String Gas Cosmology
Creators: name: Arapoglu, S.
name: Karakci, A.
name: Kaya, A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We consider a toy cosmological model in string theory involving the winding and momentum modes of (m,n) strings, i.e. bound states of m fundamental and n D-strings. The model is invariant under S-duality provided that m and n are interchanged. The dilaton is naturally stabilized due to S-duality invariance, which offers a new mechanism of moduli fixing in string gas cosmology. Using a tachyon field rolling down to its ground state, we also point out a possible way of realizing a cosmological phase with decreasing Hubble radius and constant dilaton.
description: 6 pages, revtex4, v2: references and comments added
MOJAVE: Monitoring of Jets in AGN with VLBA Experiments. III. Deep VLA Images at 1.4 GHz
Creators: name: Cooper, N. J.
name: Lister, M. L.
name: Kochanczyk, M. D.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The MOJAVE blazar sample consists of the 133 brightest, most compact radio-loud AGN in the northern sky, and is selected on the basis of VLBA 2 cm correlated flux density exceeding 1.5 Jy (2 Jy for declinations south of 0 degrees) at any epoch between 1994 and 2003. Since 1994 we have been gathering VLBA data on the sample to measure superluminal jet speeds and to better understand the parsec-scale kinematics of AGN jets. We have obtained 1.4 GHz VLA-A configuration data on 57 of these sources to investigate whether the extended luminosity of blazars is correlated with parsec-scale jet speed, and also to determine what other parsec-scale properties are related to extended morphology, such as optical emission line strength and gamma$ray emission. We present images and measurements of the kilo-parsec scale emission from the VLA data, which will be used in subsequent statistical studies of the MOJAVE sample.
description: 20 pages, 2 tables, 3 figures, revised, accepted The Astrophysical Journal Supplement
Πολιτική και δραστηριότητες παιδικών βιβλιοθηκών Θεσσαλονίκης: Το παράδειγμα της παιδικής βιβλιοθήκης Ορέστου
Creators: name: Θεοχαρίδου, Καλλιόπη Δημητρίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2015
Subjects: Παιδικές βιβλιοθήκες
Βιβλιοθηκονόμοι
Ομάδες εστίασης
Children libraries
Librarians
Focus groups

description: Η εργασία πραγματεύεται το ζήτημα της καλλιέργειας της φιλαναγνωσίας στα παιδιά μέσω των δημοτικών παιδικών βιβλιοθηκών. Θεωρητικό πλαίσιο της έρευνας αποτέλεσε η έννοια και τα κίνητρα της φιλαναγνωσίας, ο ρόλος των βιβλιοθηκών και ειδικότερα των παιδικών βιβλιοθηκών και τέλος, ο ρόλος του σύγχρονου βιβλιοθηκονόμου, ο οποίος τις τελευταίες δεκαετίες έχει διευρυνθεί. Σκοπός της έρευνας ήταν να εξετα¬στεί η λειτουργία της παιδικής βιβλιοθήκης της Ορέστου του Δήμου Θεσσαλονίκης και, λαμβάνοντάς τη ως παράδειγμα, να κατανοηθεί ευρύτερα η λειτουργία των παιδικών βιβλιοθηκών του Δήμου. Κίνητρο για την επιλογή της συγκεκριμένης βιβλιοθήκης αποτέλεσε η ένταξη της στο πρόγραμμα του Future Library, ώστε να εντοπιστούν διαφορές συγκριτικά με το παρελθόν. Ως επιμέρους στόχοι τέθηκαν η διερεύνηση της πολιτικής που ακολουθεί η παιδική βιβλιοθήκη για την προώθηση της φιλαναγνωσίας, την ενημέρωση του κοινού και τη δημοσιοποίηση της δράσης της, καθώς και η παρουσίαση των δραστηριοτήτων που διεξάγει, ώστε να προσελκύσει τα νεαρά μέλη. Για τη συλλογή των δεδομένων αξιοποιήθηκαν ατομικές συνεντεύξεις και ομάδες εστίασης (focus group). Η έρευνα ανέδειξε τη σημασία εφαρμογής της παραπάνω πολιτικής για την αποτελεσματική λειτουργία της βιβλιοθήκης και τη συμβολή της στην ανάπτυξη φιλαναγνωστικής διάθεσης στα παιδιά.
description: The following research raises the critical issue of “filanagnosia” (love of reading) and its cultivation to children via the contribution of the public libraries. The theoretical context of the particular paper is consisted of themes like the notion and motives of love reading, the role of children libraries and finally the role of librarian. The objective of the research was the examination of the Orestou’s Library function as a specimen to generally understand the function of the rest children libraries which belong to the municipality of Thessaloniki. Other objectives were the examination of the policy this library follows in order to promote love of reading and the different events around it to attract young people. The reason why this library has been chosen is its participation to the “Future Library” program. In order for the research to be conducted, individual interviews have been taken and parallel to this the method of focus groups has been used. The results of this particular research highlight the vital role of this library and its contribution to the local community.
Quantum Gowdy $T^3$ model: A unitary description
Creators: name: Corichi, Alejandro
name: Cortez, Jeronimo
name: Marugan, Guillermo A. Mena
Publisher: name: arXiv
Year: 2006
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The quantization of the family of linearly polarized Gowdy $T^3$ spacetimes is discussed in detail, starting with a canonical analysis in which the true degrees of freedom are described by a scalar field that satisfies a Klein-Gordon type equation in a fiducial time dependent background. A time dependent canonical transformation, which amounts to a change of the basic (scalar) field of the model, brings the system to a description in terms of a Klein-Gordon equation on a background that is now static, although subject to a time dependent potential. The system is quantized by means of a natural choice of annihilation and creation operators. The quantum time evolution is considered and shown to be unitary, allowing both the Schrödinger and Heisenberg pictures to be consistently constructed. This has to be contrasted with previous treatments for which time evolution failed to be implementable as a unitary transformation. Possible implications for both canonical quantum gravity and quantum field theory in curved spacetime are commented.
title: I knew how to tell her that together we will conquer the whole world
title: An Interview
titleType: Other
Creators: name: Vujović, Željko
name: Petrović, Jelena
Publisher: name: Zenodo
Year: 2023
Subjects: Željko Vujović

description: I knew how to tell her that together we will conquer the whole world

"WHEREVER I GO, I RETURN TO THE APARTMENT THAT SHE FIXED.

EVERYTHING IS AS SHE LEFT IT."

"SHE WAS THE MOST BEAUTIFUL GIRL ON THE CORSO THAT SUMMER."

"I FILLED MY SOLDIER DAYS WRITING HER LETTERS"

"IF I COULD CHOOSE AGAIN, I WOULD CHOOSE MY MARRIAGE AGAIN."
Ιστορίες Γυναικών για την Εξάρτηση και την Απεξάρτηση: Ομάδα Γυναικών στο Πρόγραμμα Προαγωγής Αυτοβοήθειας.
Creators: name: Σταυροπούλου, Ιωάννα
name: Ζαχαριά, Ελένη
name: Igic, Tatjana
Publisher: name: Aristotle University of Thessaloniki
Year: 2015
Subjects: Εξάρτηση
Απεξάπηηζη
Ομάδα Γυναικών
Αυτοβοήθεια
Πρόγραμμα Προαγωγής Αυτοβοήθειας
Addiction
Substance abuse
Recovery
Women’s group
Self Help
Self Help Programme

description: Η παρούσα έρευνα μελετά το βίωμα των γυναικών στη διάρκεια της χρήσης και στη διαδικασία της απεξάρτησης και αποτελεί μία μελέτη περίπτωσης, αναλύοντας τις συζητήσεις μιας ομάδας γυναικών που έλαβε χώρα στο Πρόγραμμα Προαγωγής Αυτοβοήθειας. Η σύσταση της ομάδας έγινε με αφορμή την παρούσα έρευνα, απαντούσε ωστόσο σε ένα ήδη διατυπωμένο αίτημα από την πλευρά των συμμετεχουσών. Τα θέματα των συναντήσεων τέθηκαν εξ’ ολοκλήρου από τις συμμετέχουσες και αφορούσαν τόσο τα αίτια έναρξης της χρήσης όσο και την ίδια την περίοδο της χρήσης, καθώς και τη διαδικασία της απεξάρτησης. Στο πλαίσιο αυτών των θεματικών συζητήθηκαν έντονα οι σχέσεις των γυναικών με τους σημαντικούς άλλους, οι ρόλοι τους οποίους οι γυναίκες ανέλαβαν την περίοδο της χρήσης, ώστε να επιβιώσουν στο περιβάλλον της πιάτσας και οι επιρροές από τους ρόλους αυτούς στη δόμηση της ταυτότητάς τους. Οι συγκρούσεις των ρόλων που συνδέονται με την έμφυλη ταυτότητα την περίοδο της χρήσης ήταν ένα ακόμη σημαντικό θέμα που απασχόλησε την ομάδα. Τέλος, η εμπλοκή με το σωφρονιστικό σύστημα και ο ανασχετικός της ρόλος στην πορεία δόμησης μιας ταυτότητας αποσυνδεδεμένης από την χρήση αποτέλεσε σημαντικό προβληματισμό για τις συμμετέχουσες.
description: This study examines life experiences of women during the period of substance abuse and during the process of rehabilitation, and represents one case study, analyzing the discussions in one therapeutic group of women held in Self Help Promoting Program. The formation of this therapeutic group was made for the occasion of the present research, however responding to an already formulated request on the part of the participants needs. The topics of the meetings came entirely from the participants and concerned, the causes for the inception of the substance abuse and the actual period in which the substance abuse occurred, as well as the process of rehabilitation. Within these topics there have been intensely discussed, women's relationships with their significant others, the roles which they undertook during the period of actual substance abuse in order to survive in the street environment at the “drug market scene” and the influences of such roles in the structuring of their identities. The clashes of roles associated with gender identity at the time of substance abuse was another important topic discussed by the group. Finally, the involvement with the legal system and the setback role in the process of building an identity apart of the substance abuse, was an important concern for the participants.
Quark Mass Deformation of Holographic Massless QCD
Creators: name: Hashimoto, Koji
name: Hirayama, Takayuki
name: Lin, Feng-Li
name: Yee, Ho-Ung
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We propose several quark mass deformations of the holographic model of massless QCD using the D4/D8/D8bar brane configuration proposed by Sakai and Sugimoto. The deformations are based on introducing additional D4 or D6 branes away from the QCD D4 branes. The idea is similar to extended technicolor theories, where the chiral symmetry breaking by additional D-branes are mediated to QCD to induce non-zero quark masses. In the D-brane picture as well as the holographic dual gravity description, the quark and the pion masses are generated by novel worldsheet instantons with finite area. We also derive the Gell-Mann-Oakes-Renner relation, and find the value of the chiral condensate in the Sakai-Sugimoto model.
description: 24 pages, v2: minor corrections in the text and references added
The Influence of Mass-Loss from a Star Cluster on its Dynamical Friction -- I. Clusters without Internal Evolution
Creators: name: Fellhauer, M.
name: Lin, D. N. C.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Many Local Group dwarf spheroidal galaxies are found in the Galactic halo along great circles in the sky. Some of these stellar systems are thought to be the fragments of larger parent galaxies which have once intruded into and were torn apart by the tide of the Galaxy. Supporting evidences for tidal disruption are found in the form of stellar tidal bridges and tails along the orbits of some dwarf galaxies and globular clusters. In this study, we investigate the influence of mass-loss from star clusters or dwarf galaxies on the rate of their orbit decay due to the effect of dynamical friction. Using a series of numerical N-body simulations, we show that stars, which become unbound from their host-systems, but remain in their vicinity and share their orbits, still contribute to the mass responsible for the dynamical friction. As a rule-by-thumb, the magnitude of dynamical friction at any instance can be approximated by the bound mass plus half of the mass which has already become unbound during the proceeding Galactic orbit. Based on these results, we suggest the tidal disruption of relatively massive satellite stellar systems may be more abrupt than previously estimated.
description: 11 pages, 15 figures, accepted by MNRAS
New constraints on R-parity violating couplings through the measurements of the $B^0_{s(d)}$-${\bar{B}^0_{s(d)}}$ and $K^0$-$\bar{K}^0$ mixing
Creators: name: Gao, Xiangdong
name: Li, Chong Sheng
name: Yang, Li Lin
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We calculate contributions to $B_s-\bar{B}_s$ mixing through tree-level sneutrino exchange in the framework of the minimal supersymmetric standard model with R-parity violation, including the next-to-leading-order QCD corrections. We compare our results with the updated bounds on the $B_s-\bar{B}_s$ mass difference reported by CDF collaborations, and present new constraints on the relevant combinations of parameters of the minimal supersymmetric standard model with R-parity violation. Our results show that upper bound on the relevant combination of couplings of $B_s-\bar{B}_s$ mixing is of the order $10^{-9}$. We also calculate the $B^0_d-\bar{B}^0_d$ and $K^0-\bar{K}^0$ mass differences, and show that the upper bounds on the relevant combinations of couplings are two and four orders of magnitude stronger than ones reported in the literatures, respectively. We also discuss the case of complex couplings and show that how the relevant combinations of couplings are constrained by the updated experiment data of $B_s-\bar{B}_s$, $B_d-\bar{B}_d$ mixing and time-dependent CP asymmetry $S_{J/ψK_s}$, and future possible observations of $S_{J/ψϕ}$ at LHCb, respectively.
description: A version to be published in PRD
MPEC 2024-T158 : 2024 TR3
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2024
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469
subject: 2024 TR3

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Additional file 1 of Psychological interventions for maternal depression among women of African and Caribbean origin: a systematic review
Creators: name: Jidong, Dung Ezekiel
name: Husain, Nusrat
name: Roche, Ayesha
name: Lourie, Grace
name: Tarela J. Ike
name: Maisha Murshed
name: Park, Miriam S.
name: Karick, Haruna
name: Zubairu K. Dagona
name: Pwajok, Juliet Y.
name: Gumber, Anil
name: Francis, Christopher
name: Nyam, Pam P.
name: Shadrack B. Mwankon
Publisher: name: figshare
Year: 2021
Subjects: subject: Medicine
subject: Biotechnology
subject: Science Policy
subject: 111714 Mental Health
subject: FOS: Health sciences

description: Additional file 1. Showing the risk assessment of each study.
Two-dimensional Vortices in Superconductors
Creators: name: Chen, Bo
name: Halperin, W. P.
name: Guptasarma, Prasenjit
name: Hinks, D. G.
name: Mitrovic, V. F.
name: Reyes, A. P.
name: Kuhns, P. L.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Superconductors have two key characteristics. They expel magnetic field and they conduct electrical current with zero resistance. However, both properties are compromised in high magnetic fields which can penetrate the material and create a mixed state of quantized vortices. The vortices move in response to an electrical current dissipating energy which destroys the zero resistance state\cite{And64}. One of the central problems for applications of high temperature superconductivity is the stabilization of vortices to ensure zero electrical resistance. We find that vortices in the anisotropic superconductor Bi$_{2}$Sr$_{2}$CaCu$_{2}$O$_{8+δ}$ (Bi-2212) have a phase transition from a liquid state, which is inherently unstable, to a two-dimensional vortex solid. We show that at high field the transition temperature is independent of magnetic field, as was predicted theoretically for the melting of an ideal two-dimensional vortex lattice\cite{Fis80,Gla91}. Our results indicate that the stable solid phase can be reached at any field as may be necessary for applications involving superconducting magnets\cite{Has04,Sca04,COHMAG}. The vortex solid is disordered, as suggested by previous studies at lower fields\cite{Lee93,Cub93}. But its evolution with increasing magnetic field displays unexpected threshold behavior that needs further investigation.
description: 5 pages and 4 figures. submitted to Nature Physics
Research and economic evaluation of the impact of current challenges and threats on the functioning of economic systems
Creators: name: Bezpartochna, Bezpartochna
name: Britchenko, Igor
name: Bezpartochnyi, Maksym
Publisher: name: Zenodo
Year: 2023
Subjects: economic security
stability
insurance companies
insurance premiums
insurance claims
insurance expenses
reinsurers
inflation
assets
liabilities
Slovakia

description: Resilience to withstand the destructive impact of the external environment and modern challenges contributes to ensure the economic security of the company. The consequences of the pandemic, military actions in Ukraine, rising inflation, and the transformation of geopolitical processes in the European Union have negatively affected the economic security of insurance companies in Slovakia. The purpose 10 of the study is to assess the economic security of Slovak insurance companies. The study is based on the analysis of profitability, assets and liabilities, premiums, claims and expenses of insurance companies in Slovakia. The forecasting methodology is applied and various scenarios of further functioning of insurance companies in Slovakia, proposed by the National Bank of Slovakia, are analyzed. Insurance companies in Slovakia have sufficient capital, losses in the forecast period can be covered by current profits, and the growth of insurance claims can be transferred to reinsurers. The study found that insurance companies in Slovakia to ensure stability and economic security, and have prospects for further operation and development.
Η σχέση ανάμεσα στην αυτοεκτίμηση και τις στάσεις μαθητών του δημοτικού απέναντι στο σχολείο σε συνάρτηση με τα δημογραφικά χαρακτηριστικά και τη σχολική τους επίδοση
Creators: name: Κόκκινος, Κωνσταντίνος Μ.
Publisher: name: Παιδαγωγική Επιθεώρηση
Year: 2015

description: Παιδαγωγική Επιθεώρηση, Vol. 37 (2004)
Ο θεσμός της Μονοπρόσωπης Εταιρίας στους διάφορους εταιρικούς τύπους
Creators: name: Στεργίου, Δήμητρα-Μαρία Γεωργίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2015
Subjects: Μονοπρόσωπη Εταιρία
Μονοπρόσωπη Προσωπική Εταιρία
Μονοπρόσωπη Κεφαλαιουχική Εταιρία
Single Member Company
Single Member General Partnership Company
Single Member Capital Company

description: Ο θεσμός της Μονοπρόσωπης εταιρίας πέρασε από διαφορετικά στάδια κατά τα οποία εμφανίστηκαν πολλοί υπέρμαχοι και πολέμιοι του εταιρικού αυτού μορφώματος. Με το πέρασμα των χρόνων η Μονοπρόσωπη εταιρία εντάχθηκε πλήρως στο Δίκαιο των εμπορικών εταιριών, αρχικά ως Μονοπρόσωπη Ε.Π.Ε. και στη συνέχεια ως Μονοπρόσωπη Α.Ε. . Ακολούθησε βέβαια μετά την έναρξη ισχύος του νόμου 4072/12 και η καθιέρωση της Μονοπρόσωπης Ιδιωτικής Κεφαλαιουχικής Εταιρίας αλλά και της (μεταβατικής) Μονοπρόσωπης Ο.Ε, η οποία βέβαια προβλέπεται για περιορισμένο χρονικό διάστημα. Η λειτουργία και η οργάνωση της ιδιαίτερης αυτής εταιρικής μορφής στους διάφορους εταιρικούς τύπους αποτελεί αντικείμενο μελέτης και ενδελεχέστερης ανάλυσης κάτι που επιχειρείται με την παρούσα διπλωματική εργασία.
description: The institution of single-member Company went through different stages in which appeared many proponents and opponents of corporate this module. Over the years the single- member company has been fully integrated in the Law of Commercial Companies, initially as LTD and then as Single-member SA. When the Law 4072/2012 came into force, it is also started existing the single-member private company and the (transitional) Single member general partnership Company, which of course is provided for limited time. The function and organization of this particular type of company to various types of companies is the subject of study and more detailed analysis which this thesis attempts to present.
General relativistic simulations of magnetized binary neutron star mergers
Creators: name: Liu, Yuk Tung
name: Shapiro, Stuart L.
name: Etienne, Zachariah B.
name: Taniguchi, Keisuke
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Binary neutron stars (NSNS) are expected to be among the leading sources of gravitational waves observable by ground-based laser interferometers and may be the progenitors of short-hard gamma ray bursts. We present a series of general relativistic NSNS coalescence simulations both for unmagnetized and magnetized stars. We adopt quasiequilibrium initial data for circular, irrotational binaries constructed in the conformal thin-sandwich (CTS) framework. We adopt the BSSN formulation for evolving the metric and a high-resolution shock-capturing scheme to handle the magnetohydrodynamics. Our simulations of unmagnetized binaries confirm the results of Shibata, Taniguchi and Uryu (2003). In cases in which the mergers result in a prompt collapse to a black hole, we are able to use puncture gauge conditions to extend the evolution and determine the mass of the material that forms a disk. We find that the disk mass is less than 2% of the total mass in all cases studied. We then add a small poloidal magnetic field to the initial configurations and study the subsequent evolution. For cases in which the remnant is a hypermassive neutron star, we see measurable differences in both the amplitude and phase of the gravitational waveforms following the merger. For cases in which the remnant is a black hole surrounded by a disk, the disk mass and the gravitational waveforms are about the same as the unmagnetized cases. Magnetic fields substantially affect the long-term, secular evolution of a hypermassive neutron star (driving `delayed collapse') and an accretion disk around a nascent black hole.
description: 19 pages, 23 figures, replaced with the published version
Οικονομετρική Διερεύνηση της Υπόθεσης των Δίδυμων Ελλειμμάτων στις Χώρες της Κεντρικής Ανατολικής Ευρώπης
Creators: name: Σκαρπέτη, Λαυρεντία Δημητρίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2015
Subjects: Έλλειμμα του Ισοζυγίου Τρεχουσών Συναλλαγών
Δημοσιονομικό Έλλειμμα
Υπόθεση των Δίδυμων Ελλειμμάτων
Current Account Deficits
Budget Deficits
Twin Deficits Hypothesis

description: Η μελέτη αυτή ερευνά την ύπαρξη αιτιώδους σχέσης ανάμεσα στο έλλειμμα του ισοζυγίου τρεχουσών συναλλαγών και του δημοσιονομικού ελλείμματος αλλά και την κατεύθυνση της αιτιότητας μεταξύ των δύο ελλειμμάτων σε ένα δείγμα από δεκαεπτά οικονομίες της Κεντρικής Ανατολικής Ευρώπης, οι οποίες είναι οι ακόλουθες: Αλβανία, Λευκορωσία, Βοσνία και Ερζεγοβίνη, Βουλγαρία, Κροατία, Τσεχία, Εσθονία, Ουγγαρία, Λεττονία, Λιθουανία, FYROM, Μολδαβία, Πολωνία, Ρουμανία, Σλοβακία, Σλοβενία και Ουκρανία. Η υπόθεση των δίδυμων ελλειμμάτων ισχύει όταν το έλλειμμα του κρατικού προϋπολογισμού οδηγεί σε έλλειμμα του ισοζυγίου τρεχουσών συναλλαγών. Η Κεϋνσιανή προσέγγιση υποστηρίζει την ύπαρξη των δίδυμων ελλειμμάτων. Αντίθετα, η υπόθεση της Ρικαρδιανής ισοδυναμίας θεωρεί ότι δεν υπάρχει καμία συσχέτιση μεταξύ των ελλειμμάτων του κρατικού προϋπολογισμού και του εμπορικού ελλείμματος. Στη παρούσα μελέτη εφαρμόζοντας την ανάλυση της συνολοκλήρωσης για πάνελ δεδομένα για την περίοδο 2000 έως το 2012, αναζητούμε την ύπαρξη της αιτιώδους σχέσης μεταξύ του ισοζυγίου τρεχουσών συναλλαγών και του ελλείμματος του κρατικού προϋπολογισμού. Τα εμπειρικά αποτελέσματα υποδεικνύουν ότι ισχύει η υπόθεση των δίδυμων ελλειμμάτων, καθώς δείχνουν ότι υπάρχει μακροχρόνια σχέση ισορροπίας ανάμεσα στις δύο μεταβλητές, όπου οι ανισορροπίες στο ισοζύγιο τρεχουσών συναλλαγών επηρεάζονται σημαντικά και προς την ίδια κατεύθυνση με το δημοσιονομικό έλλειμμα. Τα ευρήματα υποδεικνύουν ότι η διαχείριση του ελλείμματος του κρατικού προϋπολογισμού επιφέρει περιθώρια βελτίωσης του ελλείμματος του ισοζυγίου τρεχουσών συναλλαγών.
description: This research investigates the causal relationship between current account and budget deficits, as well as the direction of causality between the two, in a sample of seventeen Central Eastern European economies: which are Albania, Belarus, Bosnia and Herzegovina, Bulgaria, Croatia, Czech Republic, Estonia, Hungary, Latvia, Lithuania, FYROM, Moldova, Poland, Romania, Slovakia, Slovenia and Ukraine. Twin deficits are said to exist if the government budget deficit leads to a current account deficit. The Keynesian view predicts the prevalence of twin deficits. On the contrary, the Ricardian Equivalence predicts that there is no association between government budget deficits and trade deficits. Resorting to paneI data investigation, this paper uses different econometric techniques seeking to test the causal relationship between current account and budget deficits for the period of 2000 to 2012. The empirical results indicate that current account imbalances and budget deficits are cointegrated and that twin deficit hypothesis is supported in the CEE countries. Findings suggest that managing budget deficit offers scope for improvement in the current account deficit.
Quantum limits to center-of-mass measurements
Creators: name: Vaughan, Timothy
name: Drummond, Peter
name: Leuchs, Gerd
Publisher: name: arXiv
Year: 2006
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We discuss the issue of measuring the mean position (center-of-mass) of a group of bosonic or fermionic quantum particles, including particle number fluctuations. We introduce a standard quantum limit for these measurements at ultra-low temperatures, and discuss this limit in the context of both photons and ultra-cold atoms. In the case of fermions, we present evidence that the Pauli exclusion principle has a strongly beneficial effect, giving rise to a 1/N scaling in the position standard-deviation -- as opposed to a $1/\sqrt{N}$ scaling for bosons. The difference between the actual mean-position fluctuation and this limit is evidence for quantum wave-packet spreading in the center-of-mass. This macroscopic quantum effect cannot be readily observed for non-interacting particles, due to classical pulse broadening. For this reason, we also study the evolution of photonic and matter-wave solitons, where classical dispersion is suppressed. In the photonic case, we show that the intrinsic quantum diffusion of the mean position can contribute significantly to uncertainties in soliton pulse arrival times. We also discuss ways in which the relatively long lifetimes of attractive bosons in matter-wave solitons may be used to demonstrate quantum interference between massive objects composed of thousands of particles.
description: 12 pages, 6 figures. Submitted to PRA. Revised to include more references as well as a discussion of fermionic center-of-mass
Negative ion photoelectron spectroscopy of nineteen electron organometallic complexes
Creators: name: Martel, Arthur Andrew
Publisher: name: University of British Columbia
Year: 2009

description: The photoelectron spectra of the organometallic complexes CpCo(CO)₂⁻, MeCpMn(CO)₃⁻ and Co₂(CO)₄(NO)₂⁻, where Cp is the cyclopentadienyl ligand (C₅H₅) and MeCp the singly methylated analogue (CH₃-C₅H₄), have been obtained using Negative Ion Photoelectron Spectroscopy (NTPES) techniques. The experiments on CpCo(CO)₂⁻ and MeCpMn(CO)₃⁻ were performed at two separate laser photon wavelengths, 355 and 532 run. The cobalt dimer complex was examined only at 355 nm. Minimum vertical detachment energies for the three complexes were found to be 0.9 ± 0.1, 0.5 ± 0.1 and 2.0 ± 0.2 eV, respectively. The bond dissociation energy, D((CO)₃MnCpCH₂⁻-H), of one of the methyl hydrogens in the MeCpMn(CO)₃⁻ anion was found to be 2.2 ± 0.9 eV.
Antiferromagnetic superconductors with effective mass anisotropy in magnetic fields
Creators: name: Suginishi, Yuuichi
name: Shimahara, Hiroshi
Publisher: name: arXiv
Year: 2006
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We derive critical field H_c2 equations for antiferromagnetic \textit{s}-wave, d_{x^2-y^2}-wave, and d_{xy}-wave superconductors with effective mass anisotropy in three dimensions, where we take into account (i) the Jaccarino-Peter mechanism of magnetic-field-induced superconductivity (FISC) at high fields, (ii) an extended Jaccarino-Peter mechanism that reduces the Pauli paramagnetic pair-breaking effect at low fields where superconductivity and an antiferromagnetic long-range order with a canted spin structure coexist, and (iii) the Fulde-Ferrell-Larkin-Ovchinnikov (FFLO or LOFF) state. As an example, experimental phase diagrams observed in organic superconductor kappa-(BETS)_2FeBr_4 are theoretically reproduced. In particular, the upper critical field of low-field superconductivity is well reproduced without any additional fitting parameter other than those determined from the critical field curves of the FISC at high fields. Therefore, the extended Jaccarino-Peter mechanism seems to occur actually in the present compound. It is predicted that the FFLO state does not occur in the FISC at high fields in contrast to the compound lambda-(BETS)_2FeCl_4, but it may occur in low-field superconductivity for s-wave and d_{x^2-y^2}-wave pairings. We also briefly discuss a possibility of compounds that exhibit unconventional behaviors of upper critical fields.
description: 11 pages, 9 figures, revtex4
Καταγραφή και ανάλυση των σχεδίων προγραμμάτων Περιβαλλοντικής Εκπαίδευσης που εκπονήθηκαν στα νηπιαγωγεία και δημοτικά σχολεία της Δυτικής Μακεδονίας τη περίοδο 1997-2001
Creators: name: Ζυγούρη, Έλενα
name: Μαυρικάκη, Ευαγγελία
Publisher: name: Παιδαγωγική Επιθεώρηση
Year: 2015

description: Trying to investigate me factors that a Meet the Evaluation in Environmental Education programs in Greece we studied all the programs (160) that had been carried out in Western Macedonia during the years 1997-2001. Results showed that, the goals stated were vague and lots of times knowledge-centered. This insularity ruled also the proposed methodology where "the project" was the most popular method. This revealed another problem: that many educators are unaware of the basic methodology that could be properly used In such programs. Very impressing is also the fact that a lot of programs are carried out without any kind of evaluation. And even when this is included, it mostly concerns the knowledge gained and rarely the change in attitudes and behaviors
description: Παιδαγωγική Επιθεώρηση, Vol. 37 (2004)
Η μοναξιά στα αναγνωστικά και στα ανθολόγια του δημοτικού σχολείου υπό το πρίσμα της Αναπτυξιακής Ψυχολογίας
Creators: name: Γαλανάκη, Ευαγγελία
Publisher: name: Παιδαγωγική Επιθεώρηση
Year: 2015

description: The aim of this study is a. to identify among the texts included in reading textbooks and anthologies in the Greek primary school those that, explicitly or implicitly, refer to loneliness; and b. to approach their content and to attempt to analyze it from the viewpoint mainly of developmental psychology. The contribution of this study lies on the following aspects: a. children's loneliness is a rather neglected topic of theoretical and empirical study in psychology; b. loneliness is a universal human experience, with very important negative dimensions (it is associated with deviant development and poor mental health), as well as positive ones (it is associated with identity formation and creative activity) c. literature texts provide a means for a profound understanding of loneliness; and d. educators and psychologists should be aware of the facets of loneliness which are taught to children in order to be able to organize and implement the appropriate prevention and/or intervention strategies. Aspects and dimensions of loneliness arc located and discussed in terms of the existing theoretical approaches and the recent empirical findings within the field mainly of developmental psychology.
description: Παιδαγωγική Επιθεώρηση, Vol. 37 (2004)
Η διαδικασία της ένταξης ως συνέπεια βελτίωσης του σχολείου: αναφορά στην εφαρμογή συγκεκριμένων δεικτών ποιότητας
Creators: name: Βλάχου, Αναστασία
name: Παπαδημητρίου, Δήμητρα
Publisher: name: Παιδαγωγική Επιθεώρηση
Year: 2015

description: Since most of the principles that provide the foundation of inclusion are almost identical to those that underlie school reform, inclusion is not really present, or authentic, or effective unless it is developed as part of standards-based, whole school reform efforts. Based on the above assumption the results presented in this paper are part of a wider research concerning teachers' assessment of the degree 10 which certain quality indices were applied in their school units. The analysis focused on the examination of indices related to four broad areas; school resources, curriculum, school management and internal-external relationships. The results were discussed in terms of their implications for promoting more inclusive practices within ordinary school communities.
description: Παιδαγωγική Επιθεώρηση, Vol. 37 (2004)
Innovative approaches to business management in conditions of economic instability
Creators: name: Britchenko, Igor
Publisher: name: Zenodo
Year: 2023
Subjects: economic instability
enterprise competitiveness
enterprise management
innovative approaches
innovative management strategies

description: The article is devoted to studying innovative approaches to enterprise management in conditions of economic instability. The main goal of the research was to identify and analyse the impact of innovative strategies and management methods on the development of enterprises’ innovative potential during economic crises. To achieve this goal, special and general academic research methods were used, in particular ‘synthesis’ and ‘generalisation’, which were used to evaluate the effectiveness of the implementation of innovative approaches in the activities of enterprises in the conditions of unpredictable changes in the business environment. As a result of the study, it was found that, in conditions of economic instability, innovations in enterprise management should focus on strengthening innovative potential and production and on the technical improvement of business processes for which the formation of innovative strategies is necessary. It has been found that enterprises that actively implement innovative management methods in their activities have more chances to ensure their sustainability in challenging business conditions and, with this transformation of management practices, create conditions for dynamic growth and development of their innovative potential. As a result of the study, it has been established that using innovative approaches contributes to improving the efficiency of enterprise resource management, improves interaction with counterparties, and stimulates the further implementation of innovative solutions in production. Based on the research, the understanding and principles of forming innovative management strategies for enterprises in conditions of economic instability have been improved. In addition, a set of recommendations has been formed for enterprises and organisations regarding strengthening the management system based on innovative solutions to ensure the stability and dynamic development of business processes in crisis trends.
Baryons in AdS/QCD
Creators: name: Hong, Deog Ki
name: Inami, Takeo
name: Yee, Ho-Ung
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We construct a holographic model for baryons in the context of AdS/QCD and study the spin-1/2 nucleon spectra and its couplings to mesons, taking fully account of the effects from the chiral symmetry breaking. A pair of 5D spinors is introduced to represent both left and right chiralities. Our model contains two adjustable parameters, the infrared cutoff and the Yukawa coupling of bulk spinors to bulk scalars, corresponding to the order parameter of chiral symmetry. Taking the lowest-lying nucleon mass as an input, we calculate the mass spectrum of excited nucleons and the nucleon couplings to pions. The excited nucleons show a parity-doubling pattern with smaller pion-nucleon couplings.
description: 17 pages, no figure; v2, minor corrections, a ref. added, to appear in PLB
Το φαινόμενο της σχολικής βίας. Παιδαγωγική και Χριστιανοπαιδαγωγική προσέγγιση
Creators: name: Γιαννέζης, Πέτρος Κωνσταντίνου
Publisher: name: Aristotle University of Thessaloniki
Year: 2015
Subjects: Σχολική βία
Σχολικός εκφοβισμός
Βία
School violence
School bullying
Violence

description: Η παρούσα μελέτη πραγματεύεται το φαινόμενο της σχολικής βίας μέσα από μια παιδαγωγική και χριστιανοπαιδαγωγική οπτική. Εξετάζεται το φαινόμενο της σχολικής βίας κάτω από ένα ηθικοκοινωνικό και πνευματικό πρίσμα σε σχέση με τον τρόπο δημιουργίας και εξέλιξής του. Εξάγονται συμπεράσματα για το φαινόμενο της βίας γενικά αλλά και για τη σχολική βία ειδικότερα. Αρχικά εξετάζεται το περιεχόμενο βασικών εννοιών της βίας, της σχολικής βίας και του σχολικού εκφοβισμού. Στη συνέχεια διερευνώνται και αναλύονται τα αίτια της σχολικής βίας μέσα από τις ψυχολογικές, παιδαγωγικές, οργανικές και ηθικοπνευματικές αφετηρίες τους. Παρουσιάζονται ακόμη τα βαθύτερα κίνητρα δράσης των προσώπων και αποτυπώνονται τα χαρακτηριστικά των διάφορων μορφών της βίαιης δραστηριότητάς τους. Τέλος, προτείνονται τρόποι επίλυσης του φαινομένου της σχολικής βίας μέσα από την αλλαγή της ποιότητας της κοινωνικής πραγματικότητας. Ιδιαίτερα επισημαίνεται η σημασία της πίστης και της θρησκευτικότητας ως παράγοντας βελτίωσης της συμπεριφοράς καθώς και η σημασία της σύνδεσης της χριστιανικής πίστης και ηθικής με την ψυχολογική και κοινωνική σκέψη του παιδιού.
description: The present study investigates the phenomenon of school violence through a pedagogical and Christian - pedagogical optics. Τhe phenomenon of school violence is being examined under a moral - social and spiritual light in relation to the way of its creation and evolution. Conclusions are being exported on the phenomenon of violence in general and particularly on school violence. Originally is being considered the content of basic concepts of violence, school violence and bullying. Further, is being investigated and analyzed the causes of school violence through their psychological, pedagogical, organic and moral - social origins. Also, are being presented the main underlying motives of action of individuals and reflected the characteristics of various forms of violent activity. Finally, is being presented ways of solving the phenomenon of school violence through changing the quality of social reality. Particularly is being emphasized the importance of faith and religiosity to improve the behavior and the importance of the association of Christian faith and ethics with the psychological and social thought of the child.
Η αυτοαντίληψη παιδιών και εφήβων: σύγχρονες ερευνητικές προσεγγίσεις και επισημάνσεις
Creators: name: Λεζέ, Ευαγγελία Γ.
name: Παπαδόπουλος, Νίκος Γ.
Publisher: name: Παιδαγωγική Επιθεώρηση
Year: 2015

description: The term of "self-concept" is a favorite one in psychology and exceptionally important for the human personality and general behavior. Firstly, in this article, we attempt to approach this term, we describe in brief the developmental procedure of the formation of self-concept up to the stage of adolescence and we attempt to investigate its possible correlation with the concept of ethnic identity. The latter adds to the term "self-concept" a new dimension in the frame of modern socio-cultural conditions. The basic aim of this article has been to present (in brief) the results of recent Greek as well as international surveys, as far as the theme of "self concept / self-esteem" (of children or adolescents) is concerned, The emphasis has been on the main factors that constitute the concept of "self-concept" as well as illustrate its crucial contribution to the adjustment, the construction of a concrete Ego identity and finally its crucial role for the psychological adequacy of the individual.
description: Παιδαγωγική Επιθεώρηση, Vol. 37 (2004)
Η σύμβαση διοίκησης επιχείρησης (σύμβαση management)
Creators: name: Θεολογίδου, Γεωργία Αθανασίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2015
Subjects: Διοίκηση
Επιχείριση
Διοικητής
Management
Corporation
Manager

description: Αντικείμενο της παρούσας εργασίας αποτελεί η σύμβαση διοίκησης επιχείρησης. Για την μελέτη του συγκεκριμένου συμβατικού μορφώματος πραγματοποιήθηκε μελέτη της σχετικής βιβλιογραφίας και νομολογίας. Ειδικότερα, αναλύεται αρχικά η έννοια και τα χαρακτηριστικά της σύμβασης, ενώ διερευνάται παράλληλα και η νομική της φύση, καθώς και το νομικό πλαίσιο που τη διέπει. Έπειτα επιχειρείται μια μελέτη του τρόπου κατάρτισης της σύμβασης, του περιεχομένου της, καθώς και των δικαιωμάτων και υποχρεώσεων που απορρέουν από αυτήν για τα συμβαλλόμενα μέρη. Τέλος, πραγματοποιείται μια αντιπαραβολή της σύμβασης αυτής με άλλες εμπορικές συμβάσεις, ώστε να αναδειχθούν καλύτερα τα χαρακτηριστικά που τη διαφοροποιούν από αυτές, ενώ εξετάζονται και ορισμένα ειδικότερα ζητήματα που αφορούν τη σύμβαση management σε σχέση με το εργατικό δίκαιο, το δίκαιο του ελεύθερου ανταγωνισμού, καθώς και το δίκαιο των εμπορικών εταιριών.
description: The subject of this thesis is the management agreement. For the analysis of this particular contract the relevant legal cases and bibliographic sources have been reviewed. In particular, there has been initially an analysis of the concept and the main characteristics of this contract, followed by a study of its legal nature and the legal framework governing it. Further, this thesis analyses the conclusion of the management agreement, its content, and the rights and obligations arising from it for the contracting parties. Finally, a comparison of this agreement with other commercial contracts is used in order to highlight the distinguishing characteristics of the management agreement, whilst some specific issues of labor law, competition law and corporate law relating to the management contract are examined.
Θεωρία Μαγνητικών Μονοπόλων και Αριθμητικές Προσομοιώσεις
Creators: name: Σουραϊλίδης, Διονύσιος Παντελεήμονος
Publisher: name: Aristotle University of Thessaloniki
Year: 2015
Subjects: Μονόπολα
Ηλεκτροδυναμική
Θεωρία Πεδίου
Monopoles
Electrodynamics
Field Theory

description: Σκοπός αυτής της διπλωματικής εργασίας ήταν η θεωρητική και υπολογιστική μελέτη των μαγνητικών μονοπόλων. Αρχικά, γίνεται μια αναφορά σε θεμελιώδεις έννοιες της Κλασικής Θεωρίας Πεδίου και της Θεωρίας Ομάδων. Στη συνέχεια, διερευνούμε τα βασικά της θεωρίας των μαγνητικών μονοπόλων, ξεκινώντας από το μονόπολο Dirac, που είναι αβελιανό. Ακόμη, κάνουμε μια εισαγωγή στο μοντέλο Georgi-Glashow, που είναι μη αβελιανό και οδηγεί στο μονόπολο 't Hooft-Polyakov. Για να ελαχιστοποιήσουμε το συναρτησοειδές της ενέργειας, εφαρμόζουμε τη μέθοδο των μεταβολών. Ως αποτέλεσμα, εμφανίζεται ένα δεύτερης τάξης, μη γραμμικό σύστημα διαφορικών εξισώσεων. Λύνουμε αυτό το σύστημα αριθμητικά και μελετούμε την οριακή συμπεριφορά των δυναμικών. Στη συνέχεια, αντικαθιστούμε τις λύσεις αυτές στο συναρτησοειδές της ενέργειας και βρίσκουμε τις αντίστοιχες τιμές της συνάρτησης μάζας.
description: The purpose of this thesis is the theoretical and numerical study of magnetic monopoles. At first, we refer to fundamental concepts of Classical Field Theory and Group Theory. Afterwards, we study the basics of magnetic monopole theory, starting with the Dirac monopole, which is Abelian. We also make an introduction to the Georgi-Glashow model, which is non-Abelian and leads to the 't Hooft-Polyakov monopole. In order to minimise the energy functional, we apply the variational method, and, as a result, a non-linear, second order system of differential equations emerges. We solve this system numerically, and study the limiting behaviour of the potentials. We then substitute these solutions to the energy functional and find the corresponding values of the mass function.