cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Αυτορρύθμιση μαθητών πρωτοβάθμιας και δευτεροβάθμιας εκπαίδευσης με μέτρια νοητική ανεπάρκεια
Creators: name: Καββαδίας, Χρήστος Φιλήμωνος
Publisher: name: Aristotle University of Thessaloniki
Year: 2015
Subjects: Νοητική Ανεπάρκεια
Αυτορρύθμιση
Εκπαίδευση
Mental Retardation
Self- regulation
Education

description: Η ανάπτυξη της ικανότητας αυτορρύθμισης, ως μία σύνθετη διεργασία που ενεργοποιεί το άτομο να αναλαμβάνει δράση, αποτελεί ένα από τα σημαντικότερα επιτεύγματα της παιδικής ηλικίας, ωστόσο, στα άτομα με νοητική ανεπάρκεια, η ικανότητα αυτή είναι ελλειμματική. Για το λόγο αυτό, η υποστήριξη, παρότρυνση και εκπαίδευση των μαθητών με νοητική ανεπάρκεια προς την κατεύθυνση της εκδήλωσης αυτορυθμιζόμενης συμπεριφοράς, θεωρείται μείζονος σημασίας για την κοινωνική, συμπεριφορική και γνωστική τους ανάπτυξη. Η παρούσα έρευνα επικεντρώνεται στη διερεύνηση του επιπέδου αυτορρύθμισης σε 47 μαθητές με μέτρια νοητική ανεπάρκεια (22 πρωτοβάθμιας και 25 δευτεροβάθμιας εκπαίδευσης) και την αποσαφήνιση των διαφοροποιήσεων που υπάρχουν σε αυτούς, ανάλογα με την ηλικία τους, εστιάζοντας στο βαθμό εσωτερικής ή εξωτερικής παρώθησης και το είδος των κινήτρων που αναπτύσσουν. Σύμφωνα με τα ερευνητικά αποτελέσματα, το επίπεδο αυτορρύθμισης των μαθητών βρέθηκε σχετικά χαμηλό, ιδιαίτερα σε ότι αφορά την εσωτερική αυτορρύθμιση στα παιδιά της πρωτοβάθμιας εκπαίδευσης και την εξωτερική αυτορρύθμιση σε αυτά της δευτεροβάθμιας. Ωστόσο, μπορεί να εξαχθεί το συμπέρασμα πως η αυτορρύθμιση αποτελεί μία διαδικασία που επιδέχεται σημαντικών βελτιώσεων στα άτομα με μέτρια νοητική ανεπάρκεια, κυρίως μέσω της εφαρμογής κατάλληλων εκπαιδευτικών στρατηγικών και παρεμβάσεων, που στοχεύουν στην εμφύσηση μίας αυτοκατευθυνόμενης συμπεριφοράς στο πλαίσιο της μαθησιακής διαδικασίας.
description: Developing a self-regulating ability, as a complex process that enables an individual to act, is one of the greatest achievements of childhood, however, for individuals with intellectual disabilities, this ability is deficient. For this reason, supporting, encouraging and educating students with intellectual disability in order to manifest a self-regulated behavior is of major importance for their social, behavioral and cognitive development. This research focuses on investigating the level of self-regulation in 47 students with moderate intellectual disability (22 from primary and 25 from secondary education) and on clarifying the differences existing between them depending on their age, by focusing on the degree on internal and external motivation and the type of incentives that they develop. According to the research results, the level of self-regulation of students was found relatively low, particularly in terms of internal self-regulation in children of primary education and external self-regulation in those of secondary education. However, it can be concluded that self-regulation is a process that is amenable to significant improvements for individuals with moderate intellectual disability, notably through the implementation of the appropriate educational strategies and interventions aiming at inculcating a self-directed behavior within the learning process.
The Red Halo Phenomenon
Creators: name: Zackrisson, E.
name: Bergvall, N.
name: Ostlin, G.
name: Micheva, G.
name: Leksell, M.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Optical and near-IR observations of the halos of disk galaxies and blue compact galaxies have revealed a very red spectral energy distribution, which cannot easily be reconciled with a normal, metal-poor stellar population like that in the stellar halo of the Milky Way. Here, spectral evolutionary models are used to explore the consequences of these observations. We demonstrate that a stellar population of low to intermediate metallicity, but with an extremely bottom-heavy initial mass function, can explain the red halos around both types of objects. Other previously suggested explanations, like nebular emission or very metal-rich stars, are shown to fail in this respect. This indicates that, if the reported halo colours are correct, halo populations dominated by low-mass stars may be a phenomenon common to galaxies of very different Hubble types. Potential tests of this hypothesis are discussed, along with its implications for the baryonic dark matter content of galaxies.
description: 6 pages, 3 figures, Accepted for publication in ApJ
VERITAS: Status and Performance
Creators: name: Holder, J.
name: collaboration, the VERITAS
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: VERITAS is an atmospheric Cherenkov telescope array sited in Tucson, Arizona. The array is nearing completion and consists of four, 12m diameter telescopes. The first telescope in the array has been operating since February 2005, while observations with the full array are expected to begin in January, 2007. We report here in some detail on the performance of the first VERITAS telescope, and briefly discuss the first stereo observations.
description: 8 pages. Submitted to Proceedings of "Science with New Generation of High Energy Gamma-ray Experiments", Elba 2006
Force probe simulations using an adaptive resolution scheme
Creators: name: Oestereich, Marco
name: Gauss, Jürgen
name: Diezemann, Gregor
Publisher: name: arXiv
Year: 2021
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Molecular simulations of the forced unfolding and refolding of biomolecules or molecular complexes allow to gain important kinetic, structural and thermodynamic information about the folding process and the underlying energy landscape. In force probe molecular dynamics (FPMD) simulations, one pulls one end of the molecule with a constant velocity in order to induce the relevant conformational transitions. Since the extended configuration of the system has to fit into the simulation box together with the solvent such simulations are very time consuming. Here, we apply a hybrid scheme in which the solute is treated with atomistic resolution and the solvent molecules far away from the solute are described in a coarse-grained manner. We use the adaptive resolution scheme (AdResS) that has very successfully been applied to various examples of equilibrium simulations. We perform FPMD simulations using AdResS on a well studied system, a dimer formed from mechanically interlocked calixarene capsules. The results of the multiscale simulations are compared to all-atom simulations of the identical system and we observe that the size of the region in which atomistic resolution is required depends on the pulling velocity, i.e. the particular non-equilibrium situation. For large pulling velocities a larger all atom region is required. Our results show that multiscale simulations can be applied also in the strong non-equilibrium situations that the system experiences in FPMD simulations.
description: 22 pages, 12 figures
Finding a connection between load exposure and reliability of turbines in a wind farm
Creators: name: Schröder, Laura
Publisher: name: Zenodo
Year: 2019

description: The goal of this study is to characterize a relationship between the load exposure and the reliability of a turbine in a wind farm. For this purpose the wake-induced load variations within an offshore wind farm are estimated using a surrogate modelling approach. Once the surrogate model is calibrated based on a large load simulation data base, it can be used for mapping the wind field and wind farm geometry specific parameters directly to the fatigue loads. Finally, the load estimates are compared against recorded main bearing failures and patterns that can indicate a relation between the load exposure of the turbine and the main bearing reliability are presented.
International tax competition : the effects of transportation costs
Creators: name: Ritchie, James Robert.
Publisher: name: University of British Columbia
Year: 2009

description: We examine a four player stochastic game in which two of the players are representative households and two of the agents are governments. The game is set in a two country general equilibrium model where it is costly to transport goods between nations. At the beginning of each period, each country receives a random endowment of a single non-storable consumption good. Consumers determine optimal consumption levels and goods shipments based on tax rates and the amount of endowments received that period. Governments determine optimal tax rates and expenditure levels in a strategic form stage game. With complete financial markets, the terms of trade are determined by the relative amounts of goods remaining in each country after taxation and thus governments can manipulate the pattern of trade through tax policies. The choice between cooperating or acting independently in the stage game creates a Prisoners' Dilemma. In the short run governments refuse to cooperate and resort to "beggar thy neighbour" tax policies; each government attempts to better its own domestic situation by over-taxing in order to prey on the resources of its opponent. In an application of the Folk Theorem we find that the long run behaviour is cooperative and over-taxation is avoided, provided that governments and households are sufficiently patient. The addition of transportation costs adds another dimension to the short run behaviour of governments. In the same model without transportation costs, governments implement a single optimal policy strategy that is independent of the direction of net flow of goods and a unique pure strategy Nash Equilibrium always exists for the stage game. When transportation costs are introduced the optimal behaviour of households partitions the endowment space into three separate shipping regions: a foreign export, domestic export and no shipping region. In this setting governments can set policy rules contingent upon the current direction of trade, and are thus able discriminate against unfavourable patterns of trade. The ability to manipulate particular directional flows of goods combined with governments acting in their own self-interests results in the nonexistence of a pure strategy Nash equilibrium in the stage game for certain distributions of endowments. This outcome can be interpreted as a trade disagreement between the two countries; a scenario where governments disagree as to which shipping state currently exists. Repetition however can lead to cooperation. If the governments and households are sufficiently patient, then, for the repeated game, there is a unique cooperative subgame perfect equilibrium that prevents trade disputes from occurring.
Implementation of Grover search algorithm with Josephson charge qubits
Creators: name: Zheng, Xiao-Hu
name: Dong, Ping
name: Xue, Zheng-Yuan
name: Cao, Zhuo-Liang
Publisher: name: arXiv
Year: 2006
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: A scheme of implementing the Grover search algorithm based on Josephson charge qubits has been proposed, which would be a key step to scale more complex quantum algorithms and very important for constructing a real quantum computer via Josephson charge qubits. The present scheme is simple but fairly efficient, and easily manipulated because any two-charge-qubit can be selectively and effectively coupled by a common inductance. More manipulations can be carried out before decoherence sets in. Our scheme can be realized within the current technology.
description: 4 pages, 4 figures
Αγροτικά νοικοκυριά στη Χαλκιδική του 14ου αιώνα.
Creators: name: Γετίμη, Ζωή Γεωργίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2015
Subjects: Αγροτικά νοικοκυριά
Πάροικος
Χαλκιδική
Peasant households
Paroikos
Chalkidiki

description: Στην παρούσα μεταπτυχιακή εργασία εξετάζονται διάφορες πτυχές των αγροτικών νοικοκυριών που ήταν εγκατεστημένα κατά τον 14ο αιώνα στα κτήματα των μονών του Αγίου Όρους, καθώς και στα κτήματα των λαϊκών προνοιαρίων Μαρούλη και Σαβέντζη στη Χαλκιδική. Η δημογραφική ανάλυση των δεδομένων, που εντοπίζουμε στα μοναστηριακά έγγραφα, καθιστά φανερή τη μείωση του πληθυσμού κατά τη διάρκεια του 14ου αιώνα. Παράλληλα έχει μελετηθεί η δομή των νοικοκυριών και οι κοινωνικές σχέσεις που αναπτύσσονταν στην ύπαιθρο. Επιπροσθέτως, εξετάζονται οι οικονομικές δραστηριότητες, καθώς και οι φορολογικές υποχρεώσεις των μελών των αγροτικών νοικοκυριών. Εν γένει, τα αγροτικά νοικοκυριά του 14ου αιώνα αποτελούσαν συνεχώς μεταβαλλόμενες κοινωνικές και οικονομικές μονάδες.
description: This study attempts to examine the fourteenth-century peasant households that were installed in the lands of the monasteries of Mount Athos and in the estates of the pronoiarioi Maroulis and Saventzis. A demographic analysis of the data extracted from monastic documents demonstrates a population decline attributed by scholars to invasions and economic regression. Furthermore, the monastic documents reveal the structure of these households and allow us to examine the social relations in byzantine countryside. The study of the fourteenth-century tax registers (praktika) reveals the economic activity and the fiscal obligations of the peasants. In conclusion, the peasant households of Chalkidiki could be characterised as constantly changing economic and social units.
Συνδυασμός εργαλείων μάρκετινγκ επικοινωνιών στις συμφωνικές ορχήστρες: προσέλκυση ενδιαφέροντος του κοινού
Creators: name: Αθανασόπουλος, Δημήτριος Ηλία
Publisher: name: Aristotle University of Thessaloniki
Year: 2015
Subjects: Εργαλεία Μάρκετινγκ Επικοινωνιών
Συμφωνική Ορχήστρα
Πολιτιστικό Μάρκετινγκ
Marketing Communications Tools
Symphony Orchestra
Arts Marketing

description: Σκοπός της διατριβής είναι να διερευνήσει σε ποιο βαθμό οι συμφωνικές ορχήστρες αξιοποιούν συνδυασμένα εργαλεία μάρκετινγκ επικοινωνιών, ποια επιλέγουν και πως τα χρησιμοποιούν για να προσελκύσουν το ενδιαφέρον του κοινού. Αρχικά, προσεγγίζει θεωρητικά το πολιτιστικό μάρκετινγκ και έπειτα επιχειρεί να συνθέσει το επαρκέστερο μίγμα επικοινωνίας για τις συμφωνικές ορχήστρες. Μέσα από συλλογή ποιοτικών στοιχείων και συγκριτική ανάλυση, εντοπίζεται ο βαθμός εφαρμογής του, με τη μέθοδο της περιπτωσιολογικής μελέτης. Για πρώτη φορά συγκρίνονται επικοινωνιακά εργαλεία σε τέσσερεις ορχήστρες με διαφορετικά διοικητικά περιβάλλοντα. Συμπεραίνεται ότι οι συμφωνικές ορχήστρες βασίζονται στα εργαλεία μάρκετινγκ επικοινωνιών, δίνοντας έμφαση σε δημόσιες σχέσεις και ηλεκτρονικό μάρκετινγκ. Η διαπίστωση ότι ενδογενείς και εξωγενείς ιδιαιτερότητες, επηρεάζουν τις αποφάσεις του επικοινωνιακού μάρκετινγκ, αποτελεί κίνητρο για περαιτέρω έρευνα.
description: The aim of the present thesis was to research up to which degree symphony orchestras exploit combined marketing communications tools, which ones they choose to implement and how they use them to attract the public interest. Firstly, discusses theoretically the arts marketing and then attempts to synthesize the most appropriate combination of communication for orchestras. Through a collection of quality facts and analysis, identifies the implementation level via the case study method. For the first time, communication tools are compared in four different orchestras, which feature various administrative environments. The study concludes that symphony orchestras depend on marketing communications tools, while emphasizing public relations and electronic marketing. The ascertainment that intrinsic and extraneous particularities affect the decision-making of communication management proves to be motive for further research
DSR Relativistic Particle in a Lagrangian formulation and Non-Commutative Spacetime: A Gauge Independent Analysis
Creators: name: Ghosh, Subir
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this paper we have constructed a coordinate space (or geometric) Lagrangian for a point particle that satisfies the Doubly Special Relativity (DSR) dispersion relation in the Magueijo-Smolin framework. At the same time, the symplectic structure induces a Non-Commutative phase space, which interpolates between $κ$-Minkowski and Snyder phase space. Hence this model bridges an existing gap between two conceptually distinct ideas in a natural way. We thoroughly discuss how this type of construction can be carried out from a phase space (or first order) Lagrangian approach. The inclusion of external physical interactions are also briefly outlined. The work serves as a demonstration of how Hamiltonian (and Lagrangian) dynamics can be built around a given non-trivial symplectic structure.
description: 9 pages, LaTex, Title and abstract changed, Thoroughly revised version, No major change in conclusions, Title modified, sign typos in eq.s corrected, to appear in PLB
Topology controlled phase coherence and quantum fluctuations in superconducting nanowires
Creators: name: Radkevich, Alexey
name: Semenov, Andrew G.
name: Zaikin, Andrei D.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Superconducting properties of metallic nano-wires may strongly depend on specific experimental conditions. Here we consider a setup where superconducting phase fluctuations are restricted at one point inside the wire and equilibrium supercurrent flows along the wire segment of an arbitrary length $L$. Low temperature physics of this structure is essentially determined, on one hand, by smooth phase fluctuations and, on the other hand, by quantum phase slips. The zero temperature phase diagram is controlled by the wire cross section and consists of a truly superconducting phase and two different phases where superconductivity can be observed only at shorter length scales. One of the latter phases exhibits more robust short-scale superconductivity whereas another one demonstrates a power-law decay of the supercurrent with increasing $L$ already at relatively short scales.
description: 7 pages, 1 figure
Distributions of switching times of single-domain particles using a time quantified Monte Carlo method
Creators: name: Billoni, Orlando V.
name: Stariolo, Daniel A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Using a time quantified Monte Carlo scheme we performed simulations of the switching time distribution of single mono-domain particles in the Stoner-Wohlfarth approximation. We considered uniaxial anisotropy and different conditions for the external applied field. The results obtained show the switching time distribution can be well described by two relaxation times, either when the applied field is parallel to the easy axis or for an oblique external field and a larger damping constant. We found that in the low barrier limit these relaxation times are in very good agreement with analytical results obtained from solutions of the Fokker-Planck equation related to this problem. When the damping is small and the applied field is oblique the shape of the distribution curves shows several peaks and resonance effects.
description: 12 pages, 5 figures. New references, changes in the title and minor corrections
Cross-entropy method in application to SIRC model
Creators: name: Stachowiak, Maria Katarzyna
name: Szajowski, Krzysztof Józef
Publisher: name: arXiv
Year: 2020
Subjects: subject: Optimization and Control (math.OC)
subject: Probability (math.PR)
subject: Computation (stat.CO)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences
subject: 90C59, Secondary: 49N90, 92D30, 92D30, 68Q60, 91G60

description: The study considers the usage of a probabilistic optimization method called Cross-Entropy (CE). This is the version of the Monte Carlo method created by Reuven Rubinstein (1997). It was developed in the context of determining rare events. Here we will present the way in which the CE method can be used for problems of optimization of epidemiological models, and more specifically the optimization of the SIRC (Susceptible - Infectious - Recovered - Cross-immune) model based on the functions supervising the care of specific groups in the model. With the help of weighted sampling, an attempt was made to find the fastest and most accurate version of the algorithm.
description: 22 pages, 9 figures
Testing frame-dragging with the Mars Global Surveyor spacecraft in the gravitational field of Mars
Creators: name: Iorio, Lorenzo
Publisher: name: arXiv
Year: 2007
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics (astro-ph)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Geophysics (physics.geo-ph)
subject: Space Physics (physics.space-ph)
subject: FOS: Physical sciences

description: In this paper we propose an interpretation of the time series of the RMS overlap differences of the out-of-plane part $N$ of the orbit of the Martian polar orbiter Mars Global Surveyor (MGS) over a time span Delta P of about 5 years (14 November 1999-14 January 2005) in terms of the general relativistic gravitomagnetic Lense-Thirring effect. It turns out that the average of such a time series over Delta P, normalized to the predicted Lense-Thirring out-of-plane mean shift over the same time span, is μ= 1.0018 +/- 0.0053. A linear fit of the considered time series over Delta P yields a normalized slope 1.1 +/- 0.3 strengthening our interpretation of the determined MGS out-of-plane features of motion as due to the gravitomagnetic force of Mars.
description: Latex2e, 12 pages, no figures, 3 tables, 51 references. Refined calculation of the average orbit error. New value for mu. Terminology improved. References added. Sectioning improved. Important considerations in the Conclusions added. New material added about a linear fit
Μελέτη της θαλάσσιας αύρας στην περιοχή της νότιας Κύπρου με τη χρήση αριθμητικού μοντέλου μέσης κλίμακας
Creators: name: Κοντογιάννη, Παρασκευή Κωνσταντίνου
Publisher: name: Aristotle University of Thessaloniki
Year: 2015
Subjects: Θαλάσσια Αύρα
Λάρνακα
WRF
Sea Breeze
Larnaka

description: Η μελέτη των χαρακτηριστικών της ανάπτυξης της κυκλοφορίας της θαλάσσιας αύρας στην περιοχή του κόλπου της Λάρνακας στην Κύπρο με τη βοήθεια του αριθμητικού μοντέλου μέσης κλίμακας WRF, είναι το αντικείμενο της παρούσας εργασίας. Υπολογίζονται τα θερμοδυναμικά χαρακτηριστικά της θαλάσσιας αύρας, καθώς και οι δυναμικοί της παράμετροι που περιγράφουν το φαινόμενο, ενώ παρουσιάζεται αναλυτικά η περίπτωση της 3ης Σεπτεμβρίου του 2008. Μελετάται το ύψος του κυττάρου και εντοπίζεται το ρεύμα επιστροφής. Η γνώση των χαρακτηριστικών της θαλάσσιας αύρας στην ευρύτερη περιοχή της Λάρνακας συνεισφέρει στην κατανόηση του τοπικού καιρού. Μετά την εφαρμογή του μοντέλου WRF αποδεικνύεται αυτό ως ένα αρκετά ικανοποιητικό εργαλείο μελέτης τοπικών ροών, σε περιοχές με σύνθετη τοπογραφία, όπως αυτή της ευρύτερης περιοχής της Λάρνακας
description: The dynamic and thermodynamic characteristics, which could describe the sea breeze phenomenon in the area of Larnaca gulf in Cyprus, are calculated and depicted using mesoscale numerical model WRF. The case study of the 3th of September 2008 is thoroughly presented. The horizontal and vertical extends of the sea breeze circulation cells are encountered and specifically in 12 UTC the return current flows can be found in 920 mb ( 800m). The knowledge of the sea breeze circulation characteristics over the area of Larnaca contributes to the comprehension of the local weather. With this study it is proven that the WRF is a useful tool for the study of the local flows, in areas with complex terrain like this of Larnacas’ gulf.
The quantum moment problem and bounds on entangled multi-prover games
Creators: name: Doherty, Andrew C.
name: Liang, Yeong-Cherng
name: Toner, Ben
name: Wehner, Stephanie
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: Computational Complexity (cs.CC)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: We study the quantum moment problem: Given a conditional probability distribution together with some polynomial constraints, does there exist a quantum state rho and a collection of measurement operators such that (i) the probability of obtaining a particular outcome when a particular measurement is performed on rho is specified by the conditional probability distribution, and (ii) the measurement operators satisfy the constraints. For example, the constraints might specify that some measurement operators must commute. We show that if an instance of the quantum moment problem is unsatisfiable, then there exists a certificate of a particular form proving this. Our proof is based on a recent result in algebraic geometry, the noncommutative Positivstellensatz of Helton and McCullough [Trans. Amer. Math. Soc., 356(9):3721, 2004]. A special case of the quantum moment problem is to compute the value of one-round multi-prover games with entangled provers. Under the conjecture that the provers need only share states in finite-dimensional Hilbert spaces, we prove that a hierarchy of semidefinite programs similar to the one given by Navascues, Pironio and Acin [Phys. Rev. Lett., 98:010401, 2007] converges to the entangled value of the game. It follows that the class of languages recognized by a multi-prover interactive proof system where the provers share entanglement is recursive.
description: 33 pages, To appear at CCC'08
First-principles study on the intermediate compounds of LiBH$_4$
Creators: name: Ohba, N.
name: Miwa, K.
name: Aoki, M.
name: Noritake, T.
name: Towata, S-i.
name: Nakamori, Y.
name: Orimo, S-i.
name: Züttel, A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We report the results of the first-principles calculation on the intermediate compounds of LiBH$_4$. The stability of LiB$_3$H$_8$ and Li$_2$B$_n$H$_n (n=5-12)$ has been examined with the ultrasoft pseudopotential method based on the density functional theory. Theoretical prediction has suggested that monoclinic Li$_2$B$_{12}$H$_{12}$ is the most stable among the candidate materials. We propose the following hydriding/dehydriding process of LiBH$_4$ via this intermediate compound : LiBH$_4 \leftrightarrow {1/12}$Li$_{2}$B$_{12}$H$_{12} + {5/6}$ LiH $+ {13/12}$H$_2 \leftrightarrow $LiH $+$ B $+ {3/2} $H$_2$. The hydrogen content and enthalpy of the first reaction are estimated to be 10 mass% and 56 kJ/mol H$_2$, respectively, and those of the second reaction are 4 mass% and 125 kJ/mol H$_2$. They are in good agreement with experimental results of the thermal desorption spectra of LiBH$_4$. Our calculation has predicted that the bending modes for the $Γ$-phonon frequencies of monoclinic Li$_2$B$_{12}$H$_{12}$ are lower than that of LiBH$_4$, while stretching modes are higher. These results are very useful for the experimental search and identification of possible intermediate compounds.
description: 7 pages, 5 figures, submitted to PRB
MONITORING IS AN ESSENTIAL STAGE OF CLASSROOM MANAGEMENT
Creators: name: Olimova Nigora Tulkin kizi, Uzbekistan State World Languages University, English language teacher
Publisher: name: Zenodo
Year: 2024

description: The article reveals several beneficial sides of monitoring while the students are engaged in doing an activity. It is devoted to finding solutions to some issues of monitoring, such as when to monitor, how to monitor, what to monitor and why it is important to monitor.

Key words. Monitoring, guided practice, activity analysis, group interaction, instruction
ASIAVR: Asian Studies Virtual Reality Game a Learning Tool
Creators: name: Gumonan, Kenn Migan Vincent C.
name: Fabregas, Aleta C.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computers and Society (cs.CY)
subject: Human-Computer Interaction (cs.HC)
subject: FOS: Computer and information sciences
subject: I.3.7

description: The study aims to develop an application that will serve as an alternative learning tool for learning Asian Studies. The delivery of lessons into a virtual reality game depends on the pace of students. The developed application comprises several more features that enable users to get valuable information from an immersive environment. The researchers used Rapid Application Development (RAD) in developing the application. It follows phases such as requirement planning, user design, construction, and cutover. Two sets of questionnaires were developed, one for the teachers and another for the students. Then, testing and evaluation were conducted through purposive sampling to select the respondents. The application was overall rated as 3.56 which is verbally interpreted as very good. The result was based on the system evaluation using ISO 9126 in terms of functionality, usability, content, reliability, and performance. The developed application meets the objectives to provide an alternative learning tool for learning Asian Studies. The application is well commended and accepted by the end-users to provide an interactive and immersive environment for students to learn at their own pace. Further enhancement of the audio, gameplay, and graphics of the tool. Schools should take into consideration the adoption of the Asian Studies Virtual Reality is a good alternative tool for their teachers and students to teach and learn Asian Studies. The use of more 3D objects relevant to the given information to enhance the game experience may be considered. A databank for the quiz questions that will be loaded into the game should also be considered.
description: 14 pages, 10 figures, presented in International Science, Technology and Engineering Conference ISTEC 2019, and published in International Journal of Computing Sciences Research
Spatial estimation: the geostatistical point of view
Creators: name: McFadzean-Ferguson, Simon
Publisher: name: University of British Columbia
Year: 2009

description: Geostatistics involves the statistical estimation of erratic surfaces, similar to those found in geology, using sample data. It has been my experience that there are few texts in geostatistics written for people who are new to the subject, and who have not been immersed in it since its inception in the 1960's. To prevent other people becoming confused by the changing notation, and unspoken assumptions, I provide an overview of this subject, with the aim of providing a clearer understanding of the concepts involved, the assumptions made, and the motivation behind each type of estimator. I then concentrate on the more general form of estimation assuming a nonhomogeneous trend, called Universal Kriging. I explain in detail how this estimator can be found in an accurate and computationally efficient way. Using the information gained from robustness studies of this estimator, I then attempt to apply it to real surfaces, for different methods of covariance estimation and trend orders.
title: Child Emotional Abuse and Its Relationship to Obesity
Creators: name: Driscoll, Kelly Anderson
Publisher: name: Old Dominion University
publisherIdentifier: https://ror.org/04zjtrb98
publisherIdentifierScheme: ROR
Year: 2013

description: Over the past 30 years in the United States childhood obesity has more than tripled (Center for Disease Control and Prevention, 2010). In 2008, 18.5% of adolescents of the age 12-18 years old were obese in the United States (Center for Disease Control and Prevention, 2010). With the increase of obesity Americans have spent approximately 9% of their total medical costs on obesity-related illnesses (Finkelstein, Fiebelkorn, &Wang, 2003). Previous research documented the relationship between virtually every form of child abuse and subsequent obesity. Restricting focus to child emotional abuse, while studies have linked emotional abuse to the long-term consequence of adulthood obesity, the short term consequence of adolescent obesity as a result of emotional abuse has not been studied.

This study addressed this issuing using data from the National Longitudinal Survey for Youths. The relationship between six forms of less severe child emotional abuse and neglect and subsequent adolescent obesity across the span of 4, 7, and 11 years was examined. This allowed for observation of both the short and long-term relationship between the forms of child emotional abuse and obesity. Additionally, the study examined the difference between experiencing emotional abuse by a mother and a father and its relationship to obesity.

Each of the six measures of emotional abuse, mother lack of praise, father lack of praise, mother blame, father blame, mother criticism, and father criticism all are significantly related to the adolescents' obesity 4 years later. Seven years later, five of the six child emotional abuse variables remained correlated with obesity. Eleven years later, two of the sex child emotional abuse variables remained correlated with obesity. Additionally, the study proved that father emotional abuse was significantly related to obesity in the 3 years studied.

Adolescent obesity is significantly related to the experience of child emotional abuse and neglect. This adds to our understanding of the effect of child emotional abuse throughout the life cycle. In order for our country to properly address the obesity epidemic we need to understand all aspects of obesity. This study contributes to previous literature surrounding child emotional abuse and obesity and demonstrates that obesity is a short term consequence of emotional abuse.
On the gravitational radiation from the collapse of neutron stars to rotating black holes
Creators: name: Baiotti, Luca
name: Hawke, Ian
name: Rezzolla, Luciano
Publisher: name: arXiv
Year: 2007
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We provide details and present additional results on the numerical study of the gravitational-wave emission from the collapse of neutron stars to rotating black holes in three dimensions. More specifically, we concentrate on the advantages and disadvantages of the use of the excision technique and on how alternative approaches to that of excision can be successfully employed. Furthermore, as a first step towards source-characterization, we present a systematic discussion of the influence that rotation and different perturbations have on the waveforms and hence on the energy emitted in gravitational waves.
description: 21 pages, 10 figures; submitted to Classical and Quantum Gravity's special issue on numerical relativity, proceeding of the NFNR conference, Potsdam 2006
Control and readout of a superconducting qubit using a photonic link
Creators: name: Lecocq, F.
name: Quinlan, F.
name: Cicak, K.
name: Aumentado, J.
name: Diddams, S. A.
name: Teufel, J. D.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: Applied Physics (physics.app-ph)
subject: Instrumentation and Detectors (physics.ins-det)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Delivering on the revolutionary promise of a universal quantum computer will require processors with millions of quantum bits (qubits). In superconducting quantum processors, each qubit is individually addressed with microwave signal lines that connect room temperature electronics to the cryogenic environment of the quantum circuit. The complexity and heat load associated with the multiple coaxial lines per qubit limits the possible size of a processor to a few thousand qubits. Here we introduce a photonic link employing an optical fiber to guide modulated laser light from room temperature to a cryogenic photodetector, capable of delivering shot-noise limited microwave signals directly at millikelvin temperatures. By demonstrating high-fidelity control and readout of a superconducting qubit, we show that this photonic link can meet the stringent requirements of superconducting quantum information processing. Leveraging the low thermal conductivity and large intrinsic bandwidth of optical fiber enables efficient and massively multiplexed delivery of coherent microwave control pulses, providing a path towards a million-qubit universal quantum computer.
Peak thermoelectric power factor of holey silicon films
Creators: name: Ma, Jun
name: Gelda, Dhruv
name: Valavala, Krishna V.
name: Sinha, Sanjiv
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The thermoelectric properties of nanostructured silicon are not fully understood despite their initial promise. While the anomalously low thermal conductivity has attracted much work, the impact of nanostructuring on the power factor has mostly escaped attention. While initial reports did not find any significant changes to the power factor compared to the bulk, subsequent detailed measurements on p-type silicon nanowires showed a stark reduction in the Seebeck coefficient when compared to similarly doped bulk. The reduction is consistent with the disappearance of the phonon drag contribution, due to phonon boundary scattering. Here, we report measurements on a different nanostructure, holey silicon films, to test if similar loss of phonon drag can be observed. By devising experiments where all properties are measured on the same sample, we show that though these films possess electrical conductivity close to that in the bulk at comparable doping, they exhibit considerably smaller thermopower. The data are consistent with loss of phonon drag. At neck distances between 120 - 230 nm, the power factor at optimal doping is $\sim$ 50 percent that of the bulk. These insights are useful in the practical design of future thermoelectric devices based on nanostructured silicon.
description: 7 pages, 6 figures, Published in Journal of Applied Physics
Phase transitions in the early and the present Universe
Creators: name: Boyanovsky, D.
name: de Vega, H. J.
name: Schwarz, D. J.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The evolution of the Universe is the ultimate laboratory to study fundamental physics across energy scales that span about 25 orders of magnitude: from the grand unification scale through particle and nuclear physics scales down to the scale of atomic physics. The standard models of cosmology and particle physics provide the basic understanding of the early and present Universe and predict a series of phase transitions that occurred in succession during the expansion and cooling history of the Universe. We survey these phase transitions, highlighting the equilibrium and non-equilibrium effects as well as their observational and cosmological consequences. We discuss the current theoretical and experimental programs to study phase transitions in QCD and nuclear matter in accelerators along with the new results on novel states of matter as well as on multi- fragmentation in nuclear matter. A critical assessment of similarities and differences between the conditions in the early universe and those in ultra- relativistic heavy ion collisions is presented. Cosmological observations and accelerator experiments are converging towards an unprecedented understanding of the early and present Universe.
description: 41 pages, 16 figures, to appear in Ann. Rev. Nucl. Part. Sci 2006. Presentation improved, references added
Mathematical simulation of package delivery optimization using a combination of carriers
Creators: name: Yanchuk, Valentyn M.
name: Tkachuk, Andrii G.
name: Antoniuk, Dmitry S.
name: Vakaliuk, Tetiana A.
name: Humeniuk, Anna A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computers and Society (cs.CY)
subject: FOS: Computer and information sciences

description: A variety of goods and services in the contemporary world requires permanent improvement of services e-commerce platform performance. Modern society is so deeply integrated with mail deliveries, purchasing of goods and services online, that makes competition between service and good providers a key selection factor. As long as logistic, timely, and cost-effective delivery plays important part authors decided to analyze possible ways of improvements in the current field, especially for regions distantly located from popular distribution centers. Considering both: fast and lazy delivery the factor of costs is playing an important role for each end-user. Given work proposes a simulation that analyses the current cost of delivery for e-commerce orders in the context of delivery by the Supplier Fleet, World-Wide delivery service fleet, and possible vendor drop-ship and checks of the alternative ways can be used to minimize the costs. The main object of investigation is focused around mid and small businesses living far from big distribution centers (except edge cases like lighthouses, edge rocks with very limited accessibility) but actively using e-commerce solutions for daily activities fulfillment. Authors analyzed and proposed a solution for the problem of cost optimization for packages delivery for long-distance deliveries using a combination of paths delivered by supplier fleets, worldwide and local carriers. Data models and Add-ons of contemporary Enterprise Resource Planning systems were used, and additional development is proposed in the perspective of the flow selection change. The experiment is based on data sources of the United States companies using a wide range of carriers for delivery services and uses the data sources of the real companies; however, it applies repetitive simulations to analyze variances in obtained solutions.
ИНГЛИЗ ТИЛИ ГРАММАТИКАСИНИНГ УМУМНАЗАРИЙ МАСАЛАЛАРИ ХУСУСИДА
Creators: name: Т.Т.Мансурова, ЧДПУ катта укитувчиси
Publisher: name: Zenodo
Year: 2024

description: Ҳар бир тил луғавий қатламининг семантик-стилистик имкониятлари, ундаги лексик-семантик бирликларнинг грамматик, семантик-стилистик парадигмалари, бу парадигмалар мазмун сатҳи когнитив тилшуносликнинг ўрганиш объектлари ҳисобланади.

Калит сузлар: Сўз маъносининг асоси онгдаги тушунчалар, воқеликдаги ҳодисалар, сўз орқали борлиқнинг турли томонлари, кишилик жамияти, инсоннинг турмуш тажрибалари акс эттирилади.
Modulated longitudinal gates on encoded spin-qubits via curvature couplings to a superconducting cavity
Creators: name: Ruskov, Rusko
name: Tahan, Charles
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We propose entangling operations based on the energy curvature couplings of encoded spin qubits to a superconducting cavity, exploring the non-linear qubit response to a gate voltage variation. For a two-qubit ($n$-qubit) entangling gate we explore acquired geometric phases via a time-modulated longitudinal $σ_z$-coupling, offering gate times of 10s of ns even when the qubits and the cavity are far detuned. No dipole moment is necessary: the qubit transverse $σ_x$-coupling to the resonator is zero at the full sweet spot of the encoded spin qubit of interest (a triple quantum dot three-electron exchange-only qubit or a double quantum dot singlet-triplet qubit). This approach allows always-on, exchange-only qubits, for example, to stay on their "sweet spots" during gate operations, minimizing the charge noise and eliminating an always-on static longitudinal qubit-qubit coupling. We calculate the main gate errors due to the (1) diffusion (Johnson) noise and (2) damping of the resonator, the (3) $1/f$-charge noise qubit gate dephasing and $1/f$-noise on the longitudinal coupling, (4) qubit dephasing and ac-Stark frequency shifts via photon fluctuations in the resonator, and (5) spin-dependent resonator frequency shifts (via a "dispersive-like" static curvature coupling), most of them associated with the non-zero qubit energy curvature (quantum capacitance). Using spin-echo-like error suppression at optimal regimes, gate infidelities of $10^{-2}-10^{-3}$ can be achieved with experimentally existing parameters. The proposed schemes seem suitable for remote spin-to-spin entanglement of two spin-qubits or a cluster of spin-qubits: an important resource of quantum computing.
description: 31 pages, 10 figures
Mass, quark-number, and $\sqrt{s_{NN}}$ dependence of the second and fourth flow harmonics in ultra-relativistic nucleus-nucleus collisions
Creators: name: The STAR Collaboration
Publisher: name: arXiv
Year: 2007
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: We present STAR measurements of the azimuthal anisotropy parameter $v_2$ for pions, kaons, protons, $Λ$, $\barΛ$, $Ξ+\barΞ$, and $Ω+ \barΩ$, along with $v_4$ for pions, kaons, protons, and $Λ+ \barΛ$ at mid-rapidity for Au+Au collisions at $\sqrt{s_{_{NN}}}=62.4$ and 200 GeV. The $v_2(p_T)$ values for all hadron species at 62.4 GeV are similar to those observed in 130 and 200 GeV collisions. For observed kinematic ranges, $v_2$ values at 62.4, 130, and 200 GeV are as little as 10%--15% larger than those in Pb+Pb collisions at $\sqrt{s_{_{NN}}}=17.3$ GeV. At intermediate transverse momentum ($p_T$ from 1.5--5 GeV/c), the 62.4 GeV $v_2(p_T)$ and $v_4(p_T)$ values are consistent with the quark-number scaling first observed at 200 GeV. A four-particle cumulant analysis is used to assess the non-flow contributions to pions and protons and some indications are found for a smaller non-flow contribution to protons than pions. Baryon $v_2$ is larger than anti-baryon $v_2$ at 62.4 and 200 GeV perhaps indicating either that the initial spatial net-baryon distribution is anisotropic, that the mechanism leading to transport of baryon number from beam- to mid-rapidity enhances $v_2$, or that anti-baryon and baryon annihilation is larger in the in-plane direction.
description: 12 pages, 8 figures, submitted for publication in Phys. Rev. C
Equilibrium to off-equilibrium crossover in homogeneous active matter
Creators: name: Cavagna, Andrea
name: Di Carlo, Luca
name: Giardina, Irene
name: Grigera, Tomás S.
name: Pisegna, Giulia
Publisher: name: arXiv
Year: 2020
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We study the crossover between equilibrium and off-equilibrium dynamical universality classes in the Vicsek model near its ordering transition. Starting from the incompressible hydrodynamic theory of Chen et al \cite{chen2015critical}, we show that increasing the activity leads to a renormalization group (RG) crossover between the equilibrium ferromagnetic fixed point, with dynamical critical exponent $z = 2$, and the off-equilibrium active fixed point, with $z = 1.7$ (in $d=3$). We run simulations of the classic Vicsek model in the near-ordering regime and find that critical slowing down indeed changes with activity, displaying two exponents that are in remarkable agreement with the RG prediction. The equilibrium-to-off-equilibrium crossover is ruled by a characteristic length scale beyond which active dynamics takes over. Such length scale is smaller the larger the activity, suggesting the existence of a general trade-off between activity and system's size in determining the dynamical universality class of active matter.
description: 10 pages, 4 figures