cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
39-K Bose-Einstein condensate with tunable interactions
Creators: name: Roati, G.
name: Zaccanti, M.
name: D'Errico, C.
name: Catani, J.
name: Modugno, M.
name: Simoni, A.
name: Inguscio, M.
name: Modugno, G.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We produce a Bose-Einstein condensate of 39-K atoms. Condensation of this species with naturally small and negative scattering length is achieved by a combination of sympathetic cooling with 87-Rb and direct evaporation, exploiting the magnetic tuning of both inter- and intra-species interactions at Feshbach resonances. We explore tunability of the self-interactions by studying the expansion and the stability of the condensate. We find that a 39-K condensate is interesting for future experiments requiring a weakly interacting Bose gas.
description: 5 pages
นิทานวิพากษ์สังคมของวอลแตร์
Creators: name: อนงค์นาฏ เมธาคุณวุฒิ
Publisher: name: คณะอักษรศาสตร์ จุฬาลงกรณ์มหาวิทยาลัย
Year: 2526
Subjects: นิทานวิพากษ์สังคม, วอลแตร์

description: 2, 15, วารสารอักษรศาสตร์
คำและสำนวนไทยภาษาอังกฤษซึ่งมีที่มาจากปกรฌัมกรีก
Creators: name: ดวงตา สุพล
Publisher: name: คณะอักษรศาสตร์ จุฬาลงกรณ์มหาวิทยาลัย
Year: 2526
Subjects: คำและสำนวนไทยภาษาอังกฤษ, ปกรฌัมกรีก

description: 2, 15, วารสารอักษรศาสตร์
Defending IEEE Software Standards in Federal Criminal Court
Creators: name: Canellas, Marc
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computers and Society (cs.CY)
subject: FOS: Computer and information sciences
subject: D.2.4; K.5

description: IEEE's 1012 Standard for independent software and hardware verification and validation (IV&V) is under attack in U.S. federal criminal court. As software spreads through the criminal legal system, scientists, engineers, and IEEE have an essential role in ensuring courts understand and respect IEEE 1012 and IV&V. If scientists, engineers, and IEEE do not engage, courts will continue to allow unreliable scientific evidence to deprive people of their life and liberty.
description: 13 pages, 0 figures, 1 table
ชนิดของภาคแสดงในภาษาไทย
Creators: name: พัน เต๋อติ่ง
Publisher: name: คณะอักษรศาสตร์ จุฬาลงกรณ์มหาวิทยาลัย
Year: 2526
Subjects: ชนิดของภาคแสดง

description: 2, 15, วารสารอักษรศาสตร์
Polarization, transverse shifts, and angular momentum conservation laws in partial reflection and refraction of an electromagnetic wave packet
Creators: name: Bliokh, K. Yu.
name: Bliokh, Yu. P.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We present a solution to the problem of partial reflection and refraction of a polarized paraxial Gaussian beam at the interface between two transparent media. The Fedorov--Imbert transverse shift of the centers of gravity of the reflected and refracted beams are calculated. Our results differ in general case from ones derived previously by other authors. In particular, they obey general conservation law for the beams' total angular momentum but do not obey one-particle conservation laws for individual photons, which have been proposed by Onoda et al. [Phys. Rev. Lett. 93, 083901 (2004)]. We ascertain that these circumstances relate to the accepted in the literature artificial model for the polarized beam which does not fit to real beams. The present paper resolves the recent controversy and confirms results of our previous paper [Bliokh et al., Phys. Rev. Lett. 96, 073903 (2006)]. Besides, a diffraction effect of angular transverse shift of the reflected and refracted beams is predicted.
description: 18 pages, 3 figures, to appear in Phys. Rev. E
Virasoro constraints revisited
Creators: name: Cassia, Luca
name: Lodin, Rebecca
name: Zabzine, Maxim
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We revisit the Virasoro constraints and explore the relation to the Hirota bilinear equations. We furthermore investigate and provide the solution to non-homogeneous Virasoro constraints, namely those coming from matrix models whose domain of integration has boundaries. In particular, we provide the example of Hermitean matrices with positive eigenvalues in which case one can find a solution by induction on the rank of the matrix model.
description: 22 pages
ภาษาผู้หญิง : การศึกษาสมมติฐานของเลคอฟ
Creators: name: เฟ ครอสบี และ ลินดา ไนควิสต์
Publisher: name: คณะอักษรศาสตร์ จุฬาลงกรณ์มหาวิทยาลัย
Year: 2526
Subjects: ภาษาผู้หญิง, สมมติฐานของเลคอฟ

description: 2, 15, วารสารอักษรศาสตร์
Εφαρμογή εξόρυξης γνώσης από δεδομένα αθλητών
Creators: name: Ζωσιμάδης, Ηλίας Αχιλλέα
Publisher: name: Aristotle University of Thessaloniki
Year: 2019
Subjects: Εύρεση Μοτίβων
Εξόρυξη Δεδομένων
Τεχνολογία στον Αθλητισμό
Motif Discovery
Data Mining
Technology in Sports

description: Στις μέρες μας η τεχνολογία διαδραματίζει σημαντικό ρόλο στον αθλητισμό. ́Οργανα, μέθοδοι προπονητικής και τεχνικές βελτιώθηκαν με την χρήση νέων τεχνολογιών. Η χρήση αισθητήρων για την μελέτη της κίνησης των αθλητών είναι ικανή να βοηθήσει το έργο των επιστημόνων της φυσικής αγωγής. Πολλές φορές η μελέτη αυτή αφορά την εύρεση κινησιο- λογικών μοτίβων και ασυμφωνιών τα οποία μπορεί να οδηγήσουν σε χρήσιμα συμπεράσματα. Στην παρούσα διπλωματική εργασία δημιουργούμε ένα σύστημα εύρεσης μοτίβων και ασυμφω- νιών για δεδομένα κίνησης αθλητών. Συγκεκριμένα χρησιμοποιούνται τεχνικές και αλγόριθμοι εξόρυξης δεδομένων, όπως ο Matrix Profile και MPdist. Η ικανότητα του συστήματος αξιο- λογείται με ένα παράδειγμα χρήσης σε δεδομένα αθλητών μπόουλινγκ. Τα αποτελέσματα που εξάγονται από την προαναφερθείσα εφαρμογή είναι ενδεικτικά και παρέχουν μια πολύ χρήσιμη πληροφορία για τους επιστήμονες της φυσικής αγωγής
description: Nowadays, technology plays an important role in sports. Sport equipment, coaching methods and techniques improved with new technologies. The use of motion sensors, offer the possibility to provide new information to sport scientists. In many cases, this information is about discovering kinetic motifs and discords which can lead to useful results. In this thesis we propose an interactive motif and discord discovery system for motion data. Ιn particular, data mining algorithms and techniques are used, such as Matrix Profile and MPdist. We test the effectiveness of the system with motion data from bowling athletes. The results extracted from the above application provide us very useful information that can be used by sport scientists
Characterization of double binding domain derivatives of CenA from Cellulomonas fimi
Creators: name: Nordquist, David Allen
Publisher: name: University of British Columbia
Year: 2009

description: Derivatives of CenA and of CBD.PT from C. fimi with tandemly repeated binding domains were constructed. A sensitive assay using 14C-labeled proteins was developed to measure adsorption affinities for microcrystalline cellulose at low protein concentrations. It was found that the CBDs in the double binding domain derivatives could function in tandem to increase the overall adsorption affinity of CenA, provided that the catalytic domain was present and that the CBDs were separated by a full Pro-Thr linker. The catalytic domain was found to contribute to the overall adsorption affinity of the enzyme, as the affinity of the isolated binding domain was reduced compared to that of CenA. Furthermore, the nature of the linker separating domains in wild-type CenA was important for adsorption affinity of the enzyme. The activities of the double binding domain derivatives of CenA on microcrystalline and soluble substrates were unchanged compared to the activity of the wild type enzyme. Furthermore, double binding domain derivatives of CBD.PT released more small particles from intact cotton fibres than did CBD.PT, and this effect was independent of the adsorption affinity of the proteins.
Κατάρτιση και πιστοποίηση των εκπαιδευτών ενηλίκων σε σχέση με το γνωστικό τους αντικείμενο και την ομάδα αναφοράς
Creators: name: Δημητρίου, Μαρία Δέσποινα Αναστασίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2019
Subjects: Εκπαιδευτής ενηλίκων
Κατάρτιση
Πιστοποίηση
Adult educator
Training
Certification

description: Η παρούσα εργασία διερευνά την ανάγκη ανάπτυξης ειδικού πλαισίου στην κατάρτιση και πιστοποίηση εκπαιδευτών ενηλίκων σε σχέση με το γνωστικό τους αντικείμενο και την ομάδα αναφοράς. Στην έρευνα συμμετείχαν δέκα εκπαιδευτές ενηλίκων. Τα δεδομένα της συλλέχτηκαν με τη χρήση των συνεντεύξεων, στις οποίες παρουσιάζεται η προσωπική άποψη των εκπαιδευτών σχετικά με τους τρόπους με τους οποίους μπορούν οι εκπαιδευτές ενηλίκων να είναι αποτελεσματικοί στη διδασκαλία των γνωστικών τους αντικειμένων στις σύγχρονες ταχέως μεταβαλλόμενες οικονομικές και κοινωνικές συνθήκες. Επίσης, παρουσιάζεται η άποψή τους σχετικά με την ανάγκη τους για επιμόρφωση και επικαιροποίηση των επιστημονικών τους γνώσεων, την ανάγκη τους για επαρκή κατάρτιση, ώστε να προσαρμόζουν τη διδασκαλία τους σε άτομα που ανήκουν στις ευπαθείς κοινωνικά ομάδες και τέλος τη γνώμη τους για το ήδη υπάρχον πλαίσιο Πιστοποίησης Εκπαιδευτικής Επάρκειας Εκπαιδευτών Ενηλίκων μη τυπικής εκπαίδευσης στην Ελλάδα
description: This dissertation investigates the need for developing special framework in the training and certification of adult educators corresponding to their area or expertise and reference group. Ten adult educators participated in the conducted research. Its data was collected using interviews in which the personal approach of the educators, regarding the ways that adult instructors are able to be efficient in teaching their respective areas of expertise in the modern rapidly transforming economic and social conditions, is presented. Τheir opinion regarding their need for education and constant update of their scientific knowledge, their need for sufficient training in order to adapt their teaching process for people that belong in marginalized communities and finally their opinion on the already existing framework for the Certification of the Teaching Qualification of Trainers for Adults of non formal education in Greece, are also presented
GRIT: a package for structure-preserving simulations of gravitationally interacting rigid-bodies
Creators: name: Chen, Renyi
name: Li, Gongjie
name: Tao, Molei
Publisher: name: arXiv
Year: 2021
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: Spin-orbit coupling of planetary systems plays an important role in the dynamics and habitability of planets. However, symplectic integrators that can accurately simulate not only how orbit affects spin but also how spin affects orbit have not been constructed for general systems. Thus, we develop symplectic Lie-group integrators to simulate systems consisting gravitationally interacting rigid bodies. A user friendly package (GRIT \url{https://github.com/GRIT-RBSim/GRIT}) is provided and external forcings such as tidal interactions are also included. As a demonstration, this package is applied to Trappist-I. It shows that the differences in transit timing variations due to spin-orbit coupling could reach a few min in ten year measurements, and strong planetary perturbations can push Trappist-I f, g and h out of the synchronized states.
description: 18 pages, 12 figures. Accepted for publication in ApJ
Additional file 1: of Molecular evidence of Rickettsia raoultii, “Candidatus Rickettsia barbariae” and a novel Babesia genotype in marbled polecats (Vormela peregusna) at the China-Kazakhstan border
Creators: name: Liu, Xiafei
name: Yang, Meihua
name: Liu, Guangyuan
name: Zhao, Shanshan
name: Yuan, Wumei
name: Xiao, Ronghai
name: Hazihan, Wurelihazi
name: Hornok, Sándor
name: Wang, Yuanzhi
Publisher: name: figshare
Year: 2018
Subjects: subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Evolutionary Biology
subject: Chemical Sciences not elsewhere classified
subject: Biological Sciences not elsewhere classified
subject: Developmental Biology
subject: Infectious Diseases
subject: FOS: Health sciences

description: Table S1. Information for the sequences from the GenBank database used in Fig. 1. (DOCX 18 kb)
Preventing Anomalous Torques in Circumbinary Accretion Simulations
Creators: name: Dittmann, Alexander
name: Ryan, Geoffrey
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Numerical experiments are the primary method of studying the evolution of circumbinary disks due to the strong nonlinearities involved. Many circumbinary simulations also require the use of numerical mass sinks: source terms which prevent gas from unphysically accumulating around the simulated point masses by removing gas at a given rate. However, special care must be taken when drawing physical conclusions from such simulations to ensure that results are not biased by numerical artifacts. We demonstrate how the use of improved sink methods reduces some of these potential biases in vertically-integrated simulations of aspect ratio 0.1 accretion disks around binaries with mass ratios between 0.1 and 1. Specifically, we show that sink terms that do not reduce the angular momentum of gas relative to the accreting object: 1) reduce the dependence on the sink rate of physical quantities such as the torque on the binary, distribution of accretion between binary components, and evolution of the binary semi-major axis; 2) reduce the degree to which the sink rate affects the structure of the accretion disks around each binary component; 3) alter the inferred variability of accretion onto the binary, making it more regular in time. We also investigate other potential sources of systematic error, such as the precise from of gravitational softening and previously employed simplifications to the viscous stress tensor. Because of the strong dependence of the orbital evolution of the binary on both the torque and distribution of mass between binary components, the sink methods employed can have a significant effect on the inferred orbital evolution of the binary.
description: 16 pages, 10 figures, 2 tables. Submitted to ApJ
Squeezed state purification with linear optics and feed forward
Creators: name: Glöckl, O.
name: Andersen, U. L.
name: Filip, R.
name: Bowen, W. P.
name: Leuchs, G.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: A scheme for optimal and deterministic linear optical purification of mixed squeezed Gaussian states is proposed and experimentally demonstrated. The scheme requires only linear optical elements and homodyne detectors, and allows the balance between purification efficacy and squeezing degradation to be controlled. One particular choice of parameters gave a ten-fold reduction of the thermal noise with a corresponding squeezing degradation of only 11%. We prove optimality of the protocol, and show that it can be used to enhance the performance of quantum informational protocols such as dense coding and entanglement generation.
description: 4 pages, 3 figures
Search for relationship between duration of the extended solar cycles and amplitude of sunspot cycle
Creators: name: Tlatov, A. G.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Duration of the extended solar cycles is taken into the consideration. The beginning of cycles is counted from the moment of polarity reversal of large-scale magnetic field in high latitudes, occurring in the sunspot cycle n till the minimum of the cycle n+2. The connection between cycle duration and its amplitude is established. Duration of the "latent" period of evolution of extended cycle between reversals and a minimum of the current sunspot cycle is entered. It is shown, that the latent period of cycles evolution is connected with the next sunspot cycle amplitude and can be used for the prognosis of a level and time of a sunspot maximum. The 24-th activity cycle prognosis is done. Long-term behavior of extended cycle's lengths is considered.
description: 7 pages, 6 figures, 1 table
The effect of hypoxia on cytotoxicity, uptake and DNA binding of cisplatin and novel bis(platinum) complexes in Chinese hamster ovary cells
Creators: name: Matthews, Jeffrey Blair
Publisher: name: University of British Columbia
Year: 2009

description: Disagreement exists in the literature as to whether the successful antitumour agent cisplatin exhibits greater toxicity in hypoxia than in air. In this study, Chinese hamster ovary cells were incubated in clinically relevant concentrations of cisplatin for periods of up to three hours in aerobic and hypoxic environments. For all incubation times studied, cells treated in hypoxia were more sensitive to cisplatin than those treated in air. Toxicity in hypoxic cells was up to two times greater than in aerobic cells. Detection of platinum using atomic absorption spectroscopy provided resolution fine enough to characterize whole cell uptake and DNA-binding of cisplatin at these concentrations. Cells treated in hypoxia showed consistently higher levels of platinum within the cells and bound to DNA than those treated in air. Furthermore, cells treated in hypoxia showed greater toxicity perplatinum-DNA adduct and per atom of platinum bound per cell than those treated in air. Two novel bis(platinum) compounds AN-38 and AN-36, of structural formula{[Pt(malonate)(NH₃)]₂H₂N(CH₂)ƞNH₂} (n=6 and 4, respectively), were also found to be preferentially toxic to hypoxic cells, up to four times as toxic as in air (for a four hour incubation), although there was little increase in platinum uptake levels. To date, this study represents the most thorough investigation of cisplatin properties in air versus hypoxia, given that survival, whole cell uptake and DNA binding in the same cell population each showed enhanced effects in hypoxia. Suggestions of possible mechanisms explaining these data could form the basis for future studies.
Topology change, emergent symmetries and compact star matter
Creators: name: Ma, Yong-Liang
name: Rho, Mannque
Publisher: name: arXiv
Year: 2021
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Topology effects have being extensively studied and confirmed in strongly correlated condensed matter physics. In the large color number limit of QCD, baryons can be regarded as topological objects -- skyrmions -- and the baryonic matter can be regarded as a skyrmion matter. We review in this paper the generalized effective field theory for dense compact-star matter constructed with the robust inputs obtained from the skyrmion approach to dense nuclear matter, relying to possible ``emergent" scale and local flavor symmetries at high density. All nuclear matter properties from the saturation density $n_0$ up to several times $n_0$ can be fairly well described. A uniquely novel -- and unorthdox -- feature of this theory is the precocious appearance of the pseudo-conformal sound velocity $v^2_{s}/c^2 \approx 1/3$, with the non-vanishing trace of the energy momentum tensor of the system. The topology change encoded in the density scaling of low energy constants is interpreted as the quark-hadron continuity in the sense of Cheshire Cat Principle (CCP) at density $\gsim 2n_0$ in accessing massive compact stars. We confront the approach with the data from GW170817 and GW190425.
description: Version published in AAPPS Bulletin
Single-Pion Production in pp Collisions at =.95 GeV/c (I)
Creators: name: El-Samad, S Abd
name: Bilger, R.
name: Brinkmann, K. -Th.
name: Clement, H.
name: Dietrich, M.
name: Doroshkevich, E.
name: Dshemuchadse, S.
name: Erhardt, A.
name: Eyrich, W.
name: Filippi, A.
name: Freiesleben, H.
name: Fritsch, M.
name: Geyer, R.
name: Gillitzer, A.
name: Hauffe, J.
name: Hesselbarth, D.
name: Jaekel, R.
name: Jakob, B.
name: Karsch, L.
name: Kilian, K.
name: Koch, H.
name: Kress, J.
name: Kuhlmann, E.
name: Marcello, S.
name: Marwinski, S.
name: Meier, R.
name: Moeller, K.
name: Morsch, H. P.
name: Naumann, L.
name: Roderburg, E.
name: Schoenmeier, P.
name: Schulte-Wissermann, M.
name: Schroeder, W.
name: Steinke, M.
name: Stinzing, F.
name: Sun, G. Y.
name: Waechter, J.
name: Wagner, G. J.
name: Wagner, M.
name: Weidlich, U.
name: Wilms, A.
name: Wirth, S.
name: Zhang, G.
name: Zupranski, P.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: The single-pion production reactions $pp\to dπ^+$, $pp\to npπ^+$ and $pp\to ppπ^0$ were measured at a beam momentum of 0.95 GeV/c ($T_p \approx$ 400 MeV) using the short version of the COSY-TOF spectrometer. The implementation of a central calorimeter provided particle identification, energy determination and neutron detection in addition to time-of-flight and angle measurements. Thus all pion production channels were recorded with 1-4 overconstraints. The total and differential cross sections obtained are compared to previous data and theoretical calculations. Main emphasis is put on the discussion of the $ppπ^0$ channel, where we obtain angular distributions different from previous experimental results, however, partly in good agreement with recent phenomenological and theoretical predictions. In particular we observe very large anisotropies for the $π^0$ angular distributions in the kinematical region of small relative proton momenta revealing there a dominance of proton spinflip transitions associated with $π^0$ $s$- and $d$-partial waves and emphasizing the important role of $π^0$ d-waves.
Il criterio base di valutazione del costo storico e del fair value nei processi di valutazione del bilancio d’esercizio: prime proposizioni
Creators: name: Baldarelli, Maria Gabriella
name: Schiera, Maria
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 20
Subjects: SECS-P/07 Economia aziendale

description: Il lavoro ha l'obiettivo di riflettere sul ruolo del costo storico e del fair value nel processo di valutazione delle immobilizzazioni tecniche materiali ed immateriali. La riflessione si sviluppa contestualizzando all'attuale stato dell'arte delle imprese tali tematiche
Η σχέση της ενδυναμωτικής ηγεσίας με την εργασιακή ικανοποίηση και οργανωσιακή δέσμευση του εργαζόμενου
Creators: name: Μεταλληνού, Ιωάννα Ειρήνη Ιωάννη
Publisher: name: Aristotle University of Thessaloniki
Year: 2019
Subjects: Ενδυναμωτική Ηγεσία
Εργασιακή Ικανοποίηση
Οργανωσιακή Δέσμευση
Empowering Leadership
Job Satisfaction
Organizational Commitment

description: Η παρούσα εργασία εστιάζει το ενδιαφέρον της στο φαινόμενο της ηγεσίας και συγκεκριμένα στην ηγετική ενδυνάμωση. Σκοπός της ανάλυσης του εν λόγω θέματος αποτελεί η εκτενής διερεύνηση των αποτελεσμάτων της ενδυναμωτικής ηγεσίας στα πλαίσια λειτουργίας των οργανισμών και η σχέση μεταξύ αυτής και εργασιακών παραγόντων, όπως η εργασιακή ικανοποίηση και η οργανωσιακή δέσμευση. Mέσω ανασκόπησης της βιβλιογραφίας, και της διεξαγωγής ποσοτικής έρευνας με τη χρήση ερωτηματολογίου (πενταβάθμιας κλίμακας Likert), επισημαίνεται η σημασία της ενδυναμωτικής ηγεσίας, ενώ αναδεικνύεται η αποτελεσματικότητα του συγκεκριμένου στυλ ηγεσίας στους εργαζομένους και κατά επέκταση στο σύνολο των οργανισμών.Τα δεδομένα της έρευνας συλλέχθηκαν από ένα δείγμα 159 ξενοδοχειακών υπαλλήλων στην Ελλάδα. Τα συμπεράσματα που αντλήθηκαν, επιβεβαιώνουν τις υποθέσεις της έρευνας, επισημαίνοντας τη θετική συσχέτιση μεταξύ ενδυναμωτικής ηγεσίας, εργασιακής ικανοποίησης και οργανωσιακής δέσμευσης. Τέλος, καταγράφονται ορισμένες πρακτικές προτάσεις που μπορούν να συμβάλλουν στην ανάδειξη ενδυναμωτικών συμπεριφορών στους οργανισμούς, οι περιορισμοί της έρευνας καθώς και προτάσεις για την κατεύθυνση της μελλοντικής έρευνας
description: The present study’s interest is focused on the phenomenon of leadership and in particular on empowerment leadership. The purpose of this analysis is to investigate the effect of empowerment leadership within the organization extensively, and the relationship between empowerment leadership and other important organizational outcomes, such as job satisfaction and organizational commitment. Through literature review and the use of a quantitative survey conducted by self – report questionnaires (five Likert scale), the significance of empowerment leadership and the effectiveness of this leadership style to employees are indicated.Data were collected from a cross sectional sample of 159 hotel employees in Greece. The hypotheses were supported, which indicated the positive relationship between empowering leadership, job satisfaction and organizational commitment. Implications for theory and practice are discussed along with limitations and directions for future research
Uncertainties in H2 and HD Chemistry and Cooling and their Role in Early Structure Formation
Creators: name: Glover, S. C. O.
name: Abel, T.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: At low temperatures, the main coolant in primordial gas is molecular hydrogen, H2. Recent work has shown that primordial gas that is not collapsing gravitationally but is cooling from an initially ionized state forms hydrogen deuteride, HD, in sufficient amounts to cool the gas to the temperature of the cosmic microwave background. This extra cooling can reduce the characteristic mass for gravitational fragmentation and may cause a shift in the characteristic masses of population III stars. Motivated by the importance of the atomic and molecular data for the cosmological question, we assess several chemical and radiative processes that have hitherto been neglected: the sensitivity of the low temperature H2 cooling rate to the ratio of ortho-H2 to para-H2, the uncertainty in the low temperature cooling rate of H2 excited by collisions with H, the effects of cooling from H2 excited by collisions with H+ and e-, and the large uncertainties in the rates of several of the reactions responsible for determining the H2 fraction in the gas. We show that the most important of the neglected processes is the excitation of H2 by collisions with protons and electrons. This cools the gas more rapidly at early times, and so it forms less H2 and HD at late times. This fact, as well as several of the chemical uncertainties presented here, significantly affects the thermal evolution of the gas. We anticipate that this may lead to clear differences in future detailed 3D studies of first structure formation. Finally, we show that although the thermal evolution of the gas is in principle sensitive to the ortho-para ratio, in practice the standard assumption of a 3:1 ratio produces results that are almost indistinguishable from those produced by a more detailed treatment. (abridged)
description: 28 pages, 13 figures. Accepted by MNRAS
Traversable wormhole in coupled SYK models with imbalanced interactions
Creators: name: Haenel, Rafael
name: Sahoo, Sharmistha
name: Hsieh, Timothy H.
name: Franz, Marcel
Publisher: name: arXiv
Year: 2021
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: A pair of identical Sachdev-Ye-Kitaev (SYK) models with bilinear coupling forms a quantum dual of a traversable wormhole, with a ground state close to the so called thermofield double state. We use adiabaticity arguments and numerical simulations to show that the character of the ground state remains unchanged when interaction strengths in the two SYK models become imbalanced. Analysis of thermodynamic and dynamical quantities highlights the key signatures of the wormhole phase in the imbalanced case. Further adiabatic evolution naturally leads to the 'maximally imbalanced' limit where fermions in a single SYK model are each coupled to a free Majorana zero mode. This limit is interesting because it could be more easily realized using various setups proposed to implement the SYK model in a laboratory. We find that this limiting case is marginal in that it retains some of the characteristic signatures of the wormhole physics, such as the spectral gap and revival dynamics, but lacks others so that it likely does not represent the full-fledged wormhole dual. We discuss how this scenario could be implemented in the proposed realization of the SYK physics in quantum wires of finite length coupled to a disordered quantum dot.
description: 9+4 pages, 6+3 figures
Primordial Non-Gaussianity in Supersolid Inflation
Creators: name: Celoria, Marco
name: Comelli, Denis
name: Pilo, Luigi
name: Rollo, Rocco
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study primordial non-gaussianity in supersolid inflation. The dynamics of supersolid is formulated in terms of an effective field theory based on four scalar fields with a shift symmetric action minimally coupled with gravity. In the scalar sector, there are two phonon-like excitations with a kinetic mixing stemming from the completely spontaneous breaking of diffeomorphism. In a squeezed configuration, $f_{\text{NL}}$ of scalar perturbations is angle dependent and not proportional to slow-roll parameters showing a blunt violation of the Maldacena consistency relation. Contrary to solid inflation, the violation persists even after an angular average and generically the amount of non-gaussianity is significant. During inflation, non-gaussianity in the TSS and TTS sector is enhanced in the same region of the parameters space where the secondary production of gravitational waves is sizeable enough to enter in the sensitivity region of LISA, while the scalar $f_{\text{NL}}$ is still within the current experimental limits.
description: 54 pages, 13 figures. Latex file. A number of typos corrected with the JHEP version
Hidden in Plain Sight: A Double-lined White Dwarf Binary 26 pc Away and a Distant Cousin
Creators: name: Kilic, Mukremin
name: Bedard, A.
name: Bergeron, P.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: We present high-resolution spectroscopy of two nearby white dwarfs with inconsistent spectroscopic and parallax distances. The first one, PG 1632+177, is a 13th magnitude white dwarf only 25.6 pc away. Previous spectroscopic observations failed to detect any radial velocity changes in this star. Here, we show that PG 1632+177 is a 2.05 d period double-lined spectroscopic binary (SB2) containing a low-mass He-core white dwarf with a more-massive, likely CO-core white dwarf companion. After L 870-2, PG 1632+177 becomes the second closest SB2 white dwarf currently known. Our second target, WD 1534+503, is also an SB2 system with an orbital period of 0.71 d. For each system, we constrain the atmospheric parameters of both components through a composite model-atmosphere analysis. We also present a new set of NLTE synthetic spectra appropriate for modeling high-resolution observations of cool white dwarfs, and show that NLTE effects in the core of the H$α$ line increase with decreasing effective temperature. We discuss the orbital period and mass distribution of SB2 and eclipsing double white dwarfs with orbital constraints, and demonstrate that the observed population is consistent with the predicted period distribution from the binary population synthesis models. The latter predict more massive CO + CO white dwarf binaries at short ($<1$ d) periods, as well as binaries with several day orbital periods; such systems are still waiting to be discovered in large numbers.
description: MNRAS, in press
Memorandum on the development of teaching materials for the Bilingual-Bicultural Program, Indian Component, of the Ukiah Unified School District
Creators: name: Vihman, Eero
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2021
Subjects: subject: pej
subject: poo

description: Typed memorandum outlining issues related to developing teaching materials for a Northern and Central Pomo school language program in Ukiah.
Biased diffusion in confined media: Test of the Fick-Jacobs approximation and validity criteria
Creators: name: Burada, P. S.
name: Schmid, G.
name: Reguera, D.
name: Rubi, J. M.
name: Hanggi, P.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We study biased, diffusive transport of Brownian particles through narrow, spatially periodic structures in which the motion is constrained in lateral directions. The problem is analyzed under the perspective of the Fick-Jacobs equation which accounts for the effect of the lateral confinement by introducing an entropic barrier in a one dimensional diffusion. The validity of this approximation, being based on the assumption of an instantaneous equilibration of the particle distribution in the cross-section of the structure, is analyzed by comparing the different time scales that characterize the problem. A validity criterion is established in terms of the shape of the structure and of the applied force. It is analytically corroborated and verified by numerical simulations that the critical value of the force up to which this description holds true scales as the square of the periodicity of the structure. The criterion can be visualized by means of a diagram representing the regions where the Fick-Jacobs description becomes inaccurate in terms of the scaled force versus the periodicity of the structure.
description: 20 pages, 7 figures
Combined Constraints on Majorana Masses from Neutrinoless Double Beta Decay Experiments
Creators: name: Biller, Steven D.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Combined bounds on the Majorana neutrino mass for light and heavy neutrino exchange mechanisms are derived from current neutrinoless double beta decay (0ν\b{eta}\b{eta}) search results for a variety of nuclear matrix element (NME) models. The approach requires self-consistency of a given model to predict NMEs across different isotopes. The derived bounds are notably stronger than those from any single experiment and show less model-to-model variation, highlighting the advantages of using multiple isotopes in such searches. Projections indicate that the combination of near-term experiments should be able to probe well into the inverted mass hierarchy region. A method to visually represent 0ν\b{eta}\b{eta} experimental results is also suggested to more transparently compare across different isotopes and explicitly track model dependencies.
description: 5 pages, 5 figures
Τα δικαιώματα των επιβατών σύμφωνα με το δίκαιο της Ευρωπαϊκής Ένωσης
Creators: name: Δαμιανίδου, Μαγδαληνή-Ελένη Νικολάου
Publisher: name: Aristotle University of Thessaloniki
Year: 2019
Subjects: Δικαιώματα επιβατών
Κανονισμός 261/2004/ΕΚ, Κανονισμός 1371/2007/ΕΚ, Κανονισμός 1177/2010/ΕE, Κανονισμός 181/2011/ΕE
Μεταφορές επιβατών
Passengers’ rights
Regulation 261/2004/ EC, Regulation 1371/2007/EC, Regulation 1177/2010/EU, Regulation 181/2011/EU
Passengers’ transportation

description: Σκοπός της εργασίας είναι να πραγματοποιηθεί μια προσπάθεια συγκριτικής σκιαγράφησης των δικαιωμάτων των επιβατών στα μέσα μεταφοράς με βάση το δίκαιο της Ευρωπαϊκής Ένωσης. Το βασικό κείμενο που αναλύεται είναι ο Κανονισμός 261/2004/ΕΚ για τα δικαιώματα επιβατών αεροπορικών μεταφορών και στη συνέχεια ακολουθεί η περιγραφή μιας σειράς «θεματικών» Κανονισμών, για τους τομείς των θαλάσσιων και χερσαίων μεταφορών. Πιο συγκεκριμένα, αναλύονται ο Κανονισμός 1371/2007/ΕΚ σχετικά με τα δικαιώματα των επιβατών στις σιδηροδρομικές μεταφορές, ο Κανονισμός 1177/2010/ΕE για τα δικαιώματα των επιβατών στις θαλάσσιες και εσωτερικές πλωτές μεταφορές, και τελευταίος ο Κανονισμός 181/2011/ΕE που αφορά τα δικαιώματα των επιβατών σε λεωφορεία και πούλμαν. Το πρώτο μέρος της εργασίας επικεντρώνεται στο υποκειμενικό και το αντικειμενικό πεδίο εφαρμογής του κάθε Κανονισμού ξεχωριστά, με την παράλληλη περιγραφή των καταστάσεων που αυτός ρυθμίζει. Στο δεύτερο μέρος της εργασίας περιγράφονται τα επί μέρους δικαιώματα των επιβατών, ξεχωριστά για κάθε μέσο μεταφοράς, καθώς και η ευθύνη του αερομεταφορέα για βλάβες και φθορές με βάση το ισχύον διεθνές και ενωσιακό δίκαιο
description: The aim of the present thesis is to attempt a comparative analysis of the rights of passengers on modes of transport according to the European Union law. The main text to be analyzed is Regulation 261/2004 / EC on Air Passenger Rights, followed by the description of a series of "thematic" Regulations for the maritime and land transport sectors. In particular, Regulation 1371/2007 / EC on the rights of passengers in the field of rail transport, Regulation 1177/2010 / EU on the rights of passengers in the maritime and inland waterway transport sector, and lastly Regulation 181/2011 / EU on the rights of passengers in buses and coaches, are analyzed . The first part of the thesis focuses on the subjective and objective scope of each Regulation separately, with the parallel description of the situations it regulates. In the second part of the thesis the individual passenger rights for each mode of transport are described as well as the liability of the air carrier for damages according to international and EU law
Distinguishing Time Clustering of Astrophysical Bursts
Creators: name: Denissenya, Mikhail
name: Grossan, Bruce
name: Linder, Eric V.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Many astrophysical bursts can recur, and their time series structure or pattern could be closely tied to the emission and system physics. While analysis of periodic events is well established, some sources, e.g. some fast radio bursts and soft gamma-ray emitters, are suspected of more subtle and less explored periodic windowed behavior: the bursts themselves are not periodic, but the activity only occurs during periodic windows. We focus here on distinguishing periodic windowed behavior from merely clustered events through time clustering analysis, using techniques analogous to spatial clustering, demonstrating methods for identifying and characterizing the behavior. An important aspect is accounting for the ``curious incident of the dog in the night time'' - lack of bursts carries information. As a worked example, we analyze six years of data from the soft gamma repeater SGR1935+2154, deriving a window period of 231 days and 55% duty cycle; this has now successfully predicted both active and inactive periods.
description: 12 pages, 11 figures; v2 highlights successful burst prediction, improves uncertainty quantification, adds comparison to other optimization results, PRD accepted
Connecting the primordial and Galactic deuterium abundances
Creators: name: Steigman, Gary
name: Romano, Donatella
name: Tosi, Monica
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The deuterium abundances inferred from observations of the interstellar medium within 1-2 kpc of the Sun range over a factor of three and the corresponding oxygen abundances show an even larger dispersion. While the lower D (and O) abundances likely result from depletion onto dust, the higher D abundances are consistent with the BBN-predicted primordial D abundance and chemical evolution models of the Galaxy with infall of primordial or nearly primordial material. The large ranges in deuterium and oxygen abundances suggest that the effects of depletion and/or infall have not been homogenized in the local interstellar medium.
description: 5 pages, 4 figures; accepted for publication in MNRAS
Εκτίμηση δυναμικού ρευστοποίηση και προκαλούμενων εδαφικών παραμορφώσεων στο δυτικό τμήμα του πολεοδομικού συγκροτήματος της Θεσσαλονίκης
Creators: name: Ευσταθιάδου, Δέσποινα Νικολάου
Publisher: name: Aristotle University of Thessaloniki
Year: 2019
Subjects: Ρευστοποίηση-Θεσσαλονίκη
Δείκτης δυναμικού ρευστοποίησης
Liquefaction-Thessaloniki
Liquefaction Potential Index ( LPI)

description: Ρευστοποίηση είναι το φαινόμενο κατά το οποίο ένα κορεσμένο σε νερό μη συνεκτικό εδαφικό στρώμα σε μικρό βάθος χάνει απότομα την αντοχή, ως αποτέλεσμα της σεισμικής δόνησης και συμπεριφέρεται στιγμιαία ως ρευστό. Αντικείμενο της παρούσας διατριβής αποτελεί η εκτίμηση του δυναμικού της ρευστοποίησης και των προκαλούμενων εδαφικών παραμορφώσεων με βάση δεδομένα που έχουν προέλθει από επιτόπου δοκιμές και συγκεκριμένα δοκιμών πρότυπης διείσδυσης (SPT) στο δυτικό τμήμα του πολεοδομικού συγκροτήματος της Θεσσαλονίκης. Στόχος είναι ο υπολογισμός της εδαφικής επιτάχυνσης (PGA) που απαιτείται για την εκδήλωση ρευστοποίησης για σεισμικό γεγονός μεγέθους Mw = 6.6 σύμφωνα με δύο μοντέλα ταξινόμησης των Toprak and Holzer (2003) και του Papathanassiou (2008). Η εν λόγω περιοχή παρουσιάζει αξιόλογο ενδιαφέρον, λόγω των ιδιαίτερα πρόσφατων γεωλογικών αποθέσεων. Αρχικά παρουσιάζεται και αξιολογείται η επιδεκτικότητα προς ρευστοποίηση στους εδαφικούς σχηματισμούς 64 δειγματοληπτικών γεωτρήσεων σύμφωνα με τα κριτήρια των Bray and Sancio (2006). Έπειτα υπολογίζεται η εδαφική επιτάχυνση που απαιτείται έτσι ώστε στην επιφάνεια της θέσης στην οποία εκτελέστηκε η γεώτρηση να εκδηλωθούν φαινόμενα ρευστοποίησης. με βάση την τιμή του δείκτη δυναμικού ρευστοποίησης (LPI) και τα δύο μοντέλα ταξινόμησης. Τα αποτελέσματα παρουσιάζονται υπό μορφή χαρτών και συμπεραίνεται ότι το μοντέλο ταξινόμησης των Toprak and Holzer (2003) είναι συντηρητικό σε σχέση με του Papathanassiou (2008)
description: Liquefaction is the phenomenon in which a loose water saturated soil layer suddenly loses its strength as a result of seismic vibration and instantly behaves as a fluid. The main scope of the present thesis was the evaluation of the liquefaction hazard in the urban area of Thessaloniki based on data provided by in-situ tests, specifically by standard penetration tests. Additional aim was the calculation of the peak ground acceleration (PGA) ,that is required to characterize a site as liquefiable for a seismic scenario with magnitude Mw = 6.6, according to two classification models of Toprak and Holzer (2003) and Papathanassiou (2008). This area is of great interest due to the recent geological deposits. Initially the geotechnical data from 64 boreholes are analyzed and the liquefaction susceptibility are examined according to the criteria of Bray and Sancio (2006). Afterwards, the liquefaction potential index (LPI) of the entire column computed and used for the evaluation of the liquefaction hazard. The results are being presented in the form of maps concluding that the classification model of Toprak and Holzer (2003) is more conservative than the one of Papathanassiou (2008)
Machine Learning the 6th Dimension: Stellar Radial Velocities from 5D Phase-Space Correlations
Creators: name: Dropulic, Adriana
name: Ostdiek, Bryan
name: Chang, Laura J.
name: Liu, Hongwan
name: Cohen, Timothy
name: Lisanti, Mariangela
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: FOS: Physical sciences

description: The Gaia satellite will observe the positions and velocities of over a billion Milky Way stars. In the early data releases, the majority of observed stars do not have complete 6D phase-space information. In this Letter, we demonstrate the ability to infer the missing line-of-sight velocities until more spectroscopic observations become available. We utilize a novel neural network architecture that, after being trained on a subset of data with complete phase-space information, takes in a star's 5D astrometry (angular coordinates, proper motions, and parallax) and outputs a predicted line-of-sight velocity with an associated uncertainty. Working with a mock Gaia catalog, we show that the network can successfully recover the distributions and correlations of each velocity component for stars that fall within ~5 kpc of the Sun. We also demonstrate that the network can accurately reconstruct the velocity distribution of a kinematic substructure in the stellar halo that is spatially uniform, even when it comprises a small fraction of the total star count.
description: 7+9 pages, 3+4 figures, v2: minor revisions (typos and clarification), method and conclusions unchanged, published in ApJL
Extremal behavior of stochastic integrals driven by regularly varying Lévy processes
Creators: name: Hult, Henrik
name: Lindskog, Filip
Publisher: name: arXiv
Year: 2007
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 60F17, 60G17 (Primary) 60H05, 60G70 (Secondary)

description: We study the extremal behavior of a stochastic integral driven by a multivariate Lévy process that is regularly varying with index $α>0$. For predictable integrands with a finite $(α+δ)$-moment, for some $δ>0$, we show that the extremal behavior of the stochastic integral is due to one big jump of the driving Lévy process and we determine its limit measure associated with regular variation on the space of càdlàg functions.
description: Published at http://dx.doi.org/10.1214/009117906000000548 in the Annals of Probability (http://www.imstat.org/aop/) by the Institute of Mathematical Statistics (http://www.imstat.org)
The Physics of Galactic Winds Driven by Cosmic Rays I: Diffusion
Creators: name: Quataert, Eliot
name: Thompson, Todd A.
name: Jiang, Yan-Fei
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The physics of Cosmic ray (CR) transport remains a key uncertainty in assessing whether CRs can produce galaxy-scale outflows consistent with observations. In this paper, we elucidate the physics of CR-driven galactic winds for CR transport dominated by diffusion. A companion paper considers CR streaming. We use analytic estimates validated by time-dependent spherically-symmetric simulations to derive expressions for the mass-loss rate, momentum flux, and speed of CR-driven galactic winds, suitable for cosmological-scale or semi-analytic models of galaxy formation. For CR diffusion coefficients $κ\gtrsim r_0 c_i$ where $r_0$ is the base radius of the wind and $c_i$ is the isothermal gas sound speed, the asymptotic wind energy flux is comparable to that supplied to CRs, and the outflow rapidly accelerates to supersonic speeds. By contrast, for $κ\lesssim r_0 c_i$, CR-driven winds accelerate more slowly and lose most of their energy to gravity, a CR analogue of photon-tired stellar winds. Given CR diffusion coefficients estimated using Fermi gamma-ray observations of pion decay, we predict mass-loss rates in CR-driven galactic winds of order the star formation rate for dwarf and disc galaxies. The dwarf galaxy mass-loss rates are small compared to the mass-loadings needed to reconcile the stellar and dark matter halo mass functions. For nuclear starbursts (e.g., M82, Arp 220), CR diffusion and pion losses suppress the CR pressure in the galaxy and the strength of CR-driven winds. We discuss the implications of our results for interpreting observations of galactic winds and for the role of CRs in galaxy formation.
description: submitted to MNRAS; 20 p, 10 figs; comments welcome