cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Παρασκευή και μελέτη νανοσωματιδίων τροποποιημένης χιτοζάνης, ως φορείς αποδέσμευσης φαρμάκων:
Creators: name: Τιτοπούλου, Αλεξάνδρα Ηρακλή
Publisher: name: Aristotle University of Thessaloniki
Year: 2014
Subjects: Πολυμερή
Ελεγχόμενη απελευθέρωση φαρμάκων
Νανοσωματίδια χιτοζάνης
Polymers
Controlled drug release
Chitosan nanoparticles

description: Η ανεπαρκής οφθαλμική βιοδιαθεσιμότητα των φαρμάκων (<1%) από τις συμβατικές οφθαλμικές σταγόνες οφείλεται κυρίως στα φυσικά εμπόδια του οφθαλμού. Σε γενικές γραμμές, η οφθαλμική αποτελεσματικότητα είναι στενά συνδεδεμένη με οφθαλμική βιοδιαθεσιμότητα του φαρμάκου, η οποία μπορεί να βελτιωθεί με αύξηση της διείσδησης του φαρμάκου στον κερατοειδή και παρατείνοντας το χρόνο παραμονής του. Ως εκ τούτου, η παρούσα μελέτη έχει σκοπό να αναπτύξει και να αξιολογήσει νανοσωματίδια χιτοζάνης και τροποποιημένης χιτοζάνης με τιμολόλη ως συστήματα οφθαλμικής ελεγχόμενης απελευθέρωσης. Εκτός από τη χιτοζάνη χρησιμοποιήθηκαν τα παράγωγα της Ν-(2-καρβοξυβενζυλο)χιτοζάνης και σουκινιλο-χιτοζάνης. Τα νανοσωματίδια παρασκευάστηκαν με τη μέθοδο της ιονοτροπικής πηκτωματοποίησης και επιλέχθηκαν οι βέλτιστες αναλογίες χιτοζάνης/δικτυωτικού μέσου όπως τριπολυφωσφορικού νατρίου (Sodium Tripolyphosphate) (ΤΡΡ). Ακολούθησε μελέτη και χαρακτηρισμός με DLS, SEM, FT-IR, XRD καθώς και έλεγχος του ρυθμού διάλυσης.
description: The insufficient bioavailability of drugs (<1%) contained in conventional eye drops is due to the natural barriers of the eye. Ocular efficiency is generally closely associated with ocular bioavailability of the drug, which can be improved by increasing the penetration of the drug to the cornea and to prolong the residence time. Therefore, this study aims to develop and evaluate chitosan nanoparticles and modified chitosan nanoparticles with timolol ophthalmic controlled release systems. Apart from chitosan,the derivatives N-(2-carboxybenzyl) chitosan and succinyl chitosan were used. The nanoparticles were prepared by the ionotropic gelation method and the ratio of chitosan/crosslinking agent such as sodium tripolyphosphate (Sodium Tripolyphosphate) (TPP) were optimized. Study and characterization followed by DLS, SEM, FT-IR, XRD and control of the the dissolution rate.
Barrow HDE model for Statefinder diagnostic in FLRW Universe
Creators: name: Pradhan, Anirudh
name: Dixit, Archana
name: Bhardwaj, Vinod Kumar
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We have analyzed the Barrow holographic dark energy (BHDE) in the framework of the flat FLRW Universe by considering the various estimations of Barrow exponent $\triangle$. Here we define BHDE, by applying the usual holographic principle at a cosmological system, for utilizing the Barrow entropy rather than the standard Bekenstein-Hawking. To understand the recent accelerated expansion of the universe, considering the Hubble horizon as the IR cut-off. The cosmological parameters, especially the density parameter ($Ω_{_D}$), the equation of the state parameter ($ω_{_D}$), energy density ($ρ_{_{D}}$) and the deceleration parameter($q$) are studied in this manuscript and found the satisfactory behaviors. Moreover, we additionally focus on the two geometric diagnostics, the statefinder $(r,s)$ and $O_{m}(z)$ to discriminant BHDE model from the $ΛCDM$ model. Here we determined and plotted the trajectories of evolution for statefinder $(r, s)$, $(r,q)$ and $O_{m}(z)$ diagnostic plane to understand the geometrical behavior of the BHDE model by utilizing Planck 2018 observational information. Finally, we have explored the new Barrow exponent $\triangle$, which strongly affects the dark energy equation of state that can lead it to lie in the quintessence regime, phantom regime, and exhibits the phantom-divide line during the cosmological evolution.
description: 16 pages, 8 figures, Paper accepted in Int. J. Mod. Phys. A
Spatial and temporal feedback control of traveling wave solutions of the two-dimensional complex Ginzburg-Landau equation
Creators: name: Postlethwaite, Claire M.
name: Silber, Mary
Publisher: name: arXiv
Year: 2007
Subjects: subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Physical sciences

description: Previous work has shown that Benjamin-Feir unstable traveling waves of the complex Ginzburg-Landau equation (CGLE) in two spatial dimensions cannot be stabilized using a particular time-delayed feedback control mechanism known as `time-delay autosynchronisation'. In this paper, we show that the addition of similar spatial feedback terms can be used to stabilize such waves. This type of feedback is a generalization of the time-delay method of Pyragus (Phys. Letts. A 170, 1992) and has been previously used to stabilize waves in the one-dimensional CGLE by Montgomery and Silber (Nonlinearity 17, 2004). We consider two cases in which the feedback contains either one or two spatial terms. We focus on how the spatial terms may be chosen to select the direction of travel of the plane waves. Numerical linear stability calculations demonstrate the results of our analysis.
description: 21 pages, 7 figures, to appear in Physica D
A new branch of inflationary speed limits
Creators: name: Mathis, Dayshon
name: Mousatov, Alexandros
name: Panagopoulos, George
name: Silverstein, Eva
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We present a new mechanism for inflation which exhibits a speed limit on scalar motion, generating accelerated expansion even on a steep potential. This arises from explicitly integrating out the short modes of additional fields coupled to the inflaton $ϕ$ via a dimension six operator, yielding an expression for the effective action which includes a nontrivial (logarithmic) function of $(\partialϕ)^2$. The speed limit appears at the branch cut of this logarithm arising in a large flavor expansion, similarly to the square root branch cut in DBI inflation arising in a large color expansion. Finally, we describe observational constraints on the parameters of this model.
description: 12 pages, 1 figure
MPEC 2024-C99 : 2022 YE4
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2024
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Improving CFD simulations at local scale for wind resource assessment using data assimilation
Creators: name: Defforge C., L.
name: Carissimo, B.
name: Bocquet, M.
name: Bresson, R.
name: Armand, P.
Publisher: name: Zenodo
Year: 2019
Subjects: Data assimilation
Wind resource assessment
Wind potential
CFD
Micrometeorology
IEnKS

description: Wind resource assessment requires the accurate estimation of wind fields over the prospected sites, usually provided by atmospheric simulations. To perform such simulations at local scale, CFD models (e.g., Code_Saturne) are increasingly used, especially over complex terrains and in built environment. The accuracy of the CFD atmospheric simulations at local scale is largely determined by the accuracy of the boundary conditions, which are generally provided by outputs of mesoscale models. In order to enhance the accuracy of the boundary conditions, data assimilation methods could be used to take advantage of available observations. In fact, the prospective sites for implantation of wind farms are often equipped with meteorological instruments which provide in situ wind measurements. Among the existing data assimilation methods, the iterative ensemble Kalman smoother (IEnKS) has been chosen as it is independent of the atmospheric model and it is able to handle nonlinear models. The IEnKS has been developed for larger scale meteorology and usually deals with initial conditions. Here, it is adapted to local scale atmospheric simulations by taking boundary conditions into account. In the present study, we consider a prospective site over very complex topography where a field campaign has been performed in 2007 with three meteorological masts. Only a few observations are available whereas the boundary conditions considered correspond to 840 variables derived from the mesoscale simulations. We analyse the performances of the IEnKS in this case, first using twin experiments (synthetic measurements taken from a control simulation) and then in a cross-validation process by assimilating part of the field measurements and using the remaining for control. In both cases studied here, the IEnKS adapted to boundary conditions is proven to enhance the accuracy of local scale atmospheric simulations in operationally affordable conditions. In fact, thanks to the adapted IEnKS, the absolute error on the wind at mast is reduced as well as the uncertainty associated with this error. In turn, data assimilation allows to largely enhance the accuracy of the wind resource assessment.
Baroclinic Vorticity Production in Protoplanetary Disks; Part I: Vortex Formation
Creators: name: Petersen, Mark R.
name: Julien, Keith
name: Stewart, Glen R.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The formation of vortices in protoplanetary disks is explored via pseudo-spectral numerical simulations of an anelastic-gas model. This model is a coupled set of equations for vorticity and temperature in two dimensions which includes baroclinic vorticity production and radiative cooling. Vortex formation is unambiguously shown to be caused by baroclinicity because (1) these simulations have zero initial perturbation vorticity and a nonzero initial temperature distribution; and (2) turning off the baroclinic term halts vortex formation, as shown by an immediate drop in kinetic energy and vorticity. Vortex strength increases with: larger background temperature gradients; warmer background temperatures; larger initial temperature perturbations; higher Reynolds number; and higher resolution. In the simulations presented here vortices form when the background temperatures are $\sim 200K$ and vary radially as $r^{-0.25}$, the initial vorticity perturbations are zero, the initial temperature perturbations are 5% of the background, and the Reynolds number is $10^9$. A sensitivity study consisting of 74 simulations showed that as resolution and Reynolds number increase, vortices can form with smaller initial temperature perturbations, lower background temperatures, and smaller background temperature gradients. For the parameter ranges of these simulations, the disk is shown to be convectively stable by the Solberg-Høiland criteria.
description: Originally submitted to The Astrophysical Journal April 3, 2006; resubmitted November 3, 2006; accepted Dec 5, 2006
Αξιοποίηση περιεχομένου και υπηρεσιών επικοινωνίας ηλεκτρονικών εκπαιδευτικών πυλών από νηπιαγωγούς: μια μελέτη περίπτωσης.
Creators: name: Χαντζοπούλου, Βιργινία Κωνσταντίνου
Publisher: name: Aristotle University of Thessaloniki
Year: 2014
Subjects: κοινότητες μάθησης
ΤΠΕ και εκπαιδευτικοί
επιμόρφωση στις ΤΠΕ
communities of practice
ICT and teachers
reeducation on ICT

description: Οι Τεχνολογίες της Πληροφορίας και της Επικοινωνίας έχουν κατακλύσει τη ζωή μας σε καθημερινή βάση. Η εφαρμογή τους στο ελληνικό εκπαιδευτικό σύστημα, ολοένα και αυξάνεται. Παρατηρείται αυτό σε όλες τις βαθμίδες της εκπαίδευσης; Ας δούμε τι θέση έχουν στις προτιμήσεις των εκπαιδευτικών στην πρωτοβάθμια εκπαίδευση και πιο συγκεκριμένα στο νηπιαγωγείο. Η παρούσα διπλωματική εργασία είναι μια πιλοτική σπουδή εθνογραφικού χαρακτήρα. Είναι μια μελέτη περίπτωσης γιατί τα υποκείμενα επιλέχθηκαν όλα μόνο από νηπιαγωγεία του Βόλου. Έχει ως σκοπό να μελετήσει τον τρόπο και τι είδους χρήση των εκπαιδευτικών πυλών κάνουν. Δηλαδή αφορά το λειτουργικό μέρος ή την επικοινωνία. Θέλει να ελέγξει αν αφορά λόγους ενημέρωσης εκπαιδευτικών θεμάτων, αναζήτησης υλικού ή επικοινωνίας με άλλους συναδέλφους. Επιπλέον θέλει να ελέγξει το επίπεδο της επιμόρφωσης των νηπιαγωγών στις ΤΠΕ κι αν αυτό επηρεάζει το επίπεδο της αξιοποίησης των υπηρεσιών που αναφέρθηκαν πιο πάνω. Αποσκοπεί να βοηθήσει στο στήσιμο μιας εκπαιδευτικής πύλης βασισμένης στις ανάγκες των νηπιαγωγών και να παρουσιάσει την αναγκαιότητα της συνεργασίας και της επικοινωνίας των εκπαιδευτικών με τη χρήση του διαδικτύου. Για να ελεγχθούν τα περαιτέρω ερωτήματα επιλέχθηκαν ως εργαλείο το ερωτηματολόγιο και η ημι-δομημένη συνέντευξη. Οι συνεντεύξεις έγιναν σε νηπιαγωγούς και σε αυτήν την εργασία παρουσιάζονται τα αποτελέσματα και τα συμπεράσματα που διεξήχθηκαν
description: This thesis is an ethnographical pilot study than will help in the development of an educational portal especially designed for kindergarten teachers, which will promote the co-operation and the communication between them. The goals of this thesis are: to study the context (functional and educational part) and the communication services of the educational portals, to check the teachers’ level on the reeducation of ICT, which are the teachers’ attitudes on ICT and what type of information and communication use between them. The tool used is the semi-structured interviews, because all six subjects are chosen from kindergarten public schools of Volos
description: Συνεργαζόμενα Τμήματα Πανεπιστήμιο Λε Μαν (Maine France, Γαλλία)
MaterialGAN: Reflectance Capture using a Generative SVBRDF Model
Creators: name: Guo, Yu
name: Smith, Cameron
name: Hašan, Miloš
name: Sunkavalli, Kalyan
name: Zhao, Shuang
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: We address the problem of reconstructing spatially-varying BRDFs from a small set of image measurements. This is a fundamentally under-constrained problem, and previous work has relied on using various regularization priors or on capturing many images to produce plausible results. In this work, we present MaterialGAN, a deep generative convolutional network based on StyleGAN2, trained to synthesize realistic SVBRDF parameter maps. We show that MaterialGAN can be used as a powerful material prior in an inverse rendering framework: we optimize in its latent representation to generate material maps that match the appearance of the captured images when rendered. We demonstrate this framework on the task of reconstructing SVBRDFs from images captured under flash illumination using a hand-held mobile phone. Our method succeeds in producing plausible material maps that accurately reproduce the target images, and outperforms previous state-of-the-art material capture methods in evaluations on both synthetic and real data. Furthermore, our GAN-based latent space allows for high-level semantic material editing operations such as generating material variations and material morphing.
description: 13 pages, 16 figures. Siggraph Asia 2020
An alternative to grids and glasses: Quaquaversal pre-initial conditions for N-body simulations
Creators: name: Hansen, Steen H.
name: Agertz, Oscar
name: Joyce, Michael
name: Stadel, Joachim
name: Moore, Ben
name: Potter, Doug
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: N-body simulations sample their initial conditions on an initial particle distribution, which for cosmological simulations is usually a glass or grid, whilst a Poisson distribution is used for galaxy models, spherical collapse etc. These pre-initial conditions have inherent correlations, noise due to discreteness and preferential alignments, whilst the glass distribution is poorly defined and computationally expensive to construct. We present a novel particle distribution which can be useful as a pre-initial condition for N-body simulations, using a simple construction based on a ``quaquaversal'' tiling of space. This distribution has little preferred orientation (i.e. is statistically isotropic), has a rapidly vanishing large scale power-spectrum (P(k) ~ k^4), and is trivial to create. It should be particularly useful for warm dark matter and cold collapse simulations.
description: 8 pages, 6 figures, extended discussion of level of isotropy, matches version accepted in ApJ
title: North Fork Road Slide Stabilization
titleType: AlternativeTitle
title: Endangered Species Act Section 7(a)(2) Biological Opinion, Conference Opinion, and Magnuson-Stevens Fishery Conservation and Management Act Essential Fish Habitat Response for the North Fork Road Slide Stabilization Project, Marion County, Oregon.
Creators: name: United States. National Marine Fisheries Service. West Coast Region
Publisher: name: United States. National Marine Fisheries Service. West Coast Region
Year: 2024

description: WCRO-2023-02151
KIPPER: Sequence database versioning for Galaxy bioinformatics servers
Creators: name: Dooley, Damion
Publisher: name: F1000Research
Year: 2015

description: To recreate sequence analysis requires FASTA format reference database versions as they appeared on the date of the original analysis.  This is problematic for a number of larger databases – for example NCBI nr and nt – since past versions are not officially stored online.  Kipper seeks to address this gap by making it easy and economical to store large FASTA database versions for future reference.

The video of this presentation is available on the BOSC YouTube channel: view video.
Spacetime geometric structures and the Search for a Quantum Theory of Gravity
Creators: name: Iftime, M. D.
Publisher: name: arXiv
Year: 2007
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: One of the biggest challenges to theoretical physics of our time is to find a background-independent quantum theory of gravity. Today one encounters a profusion of different attempts at quantization, but no fully accepted - or acceptable, theory of quantum gravity. Any such approach requires a response to a question that lies at the heart of this problem. ``How shall we resolve the tension between the background dependence of all hitherto-successful quantum theories, both non-relativistic quantum mechanics and special-relativistic quantum field theory, and the background independence of classical general relativity?'' The need for a background-independent quantization procedure forms the starting point of my approach. In this paper I shall present a gauge-natural formulation of general relativity, and provide some insights into the structure of the space of geometries, which plays an important role in the construction of a non-perturbative quantum gravity using a path integral approach, as well as in string theory.
description: 12 pages
Dynamic Image for 3D MRI Image Alzheimer's Disease Classification
Creators: name: Xing, Xin
name: Liang, Gongbo
name: Blanton, Hunter
name: Rafique, Muhammad Usman
name: Wang, Chris
name: Lin, Ai-Ling
name: Jacobs, Nathan
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Artificial Intelligence (cs.AI)
subject: Machine Learning (cs.LG)
subject: Multimedia (cs.MM)
subject: FOS: Computer and information sciences

description: We propose to apply a 2D CNN architecture to 3D MRI image Alzheimer's disease classification. Training a 3D convolutional neural network (CNN) is time-consuming and computationally expensive. We make use of approximate rank pooling to transform the 3D MRI image volume into a 2D image to use as input to a 2D CNN. We show our proposed CNN model achieves $9.5\%$ better Alzheimer's disease classification accuracy than the baseline 3D models. We also show that our method allows for efficient training, requiring only 20% of the training time compared to 3D CNN models. The code is available online: https://github.com/UkyVision/alzheimer-project.
description: Accepted to ECCV2020 Workshop on BioImage Computing
Freeze-out by bulk viscosity driven instabilities
Creators: name: Torrieri, Giorgio
name: Tomášik, Boris
name: Mishustin, Igor
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We describe a new scenario (first introduced in [G. Torrieri, B. Tomášik and I. Mishustin, Phys. Rev. C \textbf{77}, 034903 (2008)]) for freezeout in heavy ion collisions that could solve the lingering problems associated with the so-called HBT puzzle. We argue that bulk viscosity increases as $T$ approaches $T_c$. The fluid {then} becomes unstable against small perturbations, and fragments into clusters of a size much smaller than the total size of the system. These clusters maintain the pre-existing outward-going flow, as a spray of droplets, but develop no flow of their own, and hadronize by evaporation. We show that this scenario can explain HBT data and suggest how it can be experimentally tested.
description: Minor corrections and reference updates. In press, Acta Physica Polonica B Talk given at the Krakow Epiphany conference, Krakow, 4 - 6 January 2008
Exact Spectral Gaps of the Asymmetric Exclusion Process with Open Boundaries
Creators: name: de Gier, Jan
name: Essler, Fabian H L
Publisher: name: arXiv
Year: 2006
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We derive the Bethe ansatz equations describing the complete spectrum of the transition matrix of the partially asymmetric exclusion process with the most general open boundary conditions. By analysing these equations in detail for the cases of totally asymmetric and symmetric diffusion, we calculate the finite-size scaling of the spectral gap, which characterizes the approach to stationarity at large times. In the totally asymmetric case we observe boundary induced crossovers between massive, diffusive and KPZ scaling regimes. We further study higher excitations, and demonstrate the absence of oscillatory behaviour at large times on the ``coexistence line'', which separates the massive low and high density phases. In the maximum current phase, oscillations are present on the KPZ scale $t\propto L^{-3/2}$. While independent of the boundary parameters, the spectral gap as well as the oscillation frequency in the maximum current phase have different values compared to the totally asymmetric exclusion process with periodic boundary conditions. We discuss a possible interpretation of our results in terms of an effective domain wall theory.
description: 42 pages, 25 figures; added appendix and minor corrections
Electrical Detection of Spin Transport in Lateral Ferromagnet-Semiconductor Devices
Creators: name: Lou, X.
name: Adelmann, C.
name: Crooker, S. A.
name: Garlid, E. S.
name: Zhang, J.
name: Reddy, S. M.
name: Flexner, S. D.
name: Palmstrom, C. J.
name: Crowell, P. A.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: A longstanding goal of research in semiconductor spintronics is the ability to inject, modulate, and detect electron spin in a single device. A simple prototype consists of a lateral semiconductor channel with two ferromagnetic contacts, one of which serves as a source of spin-polarized electrons and the other as a detector. Based on work in analogous metallic systems, two important criteria have emerged for demonstrating electrical detection of spin transport. The first is the measurement of a non-equilibrium spin population using a non-local ferromagnetic detector through which no charge current flows. The potential at the detection electrode should be sensitive to the relative magnetizations of the detector and the source electrodes, a property referred to as the spin-valve effect. A second and more rigorous test is the existence of a Hanle effect, which is the modulation and suppression of the spin valve signal due to precession and dephasing in a transverse magnetic field. Here we report on the observation of both the spin valve and Hanle effects in lateral devices consisting of epitaxial Fe Schottky tunnel barrier contacts on an n-doped GaAs channel. The dependence on transverse magnetic field, temperature, and contact separation are in good agreement with a model incorporating spin drift and diffusion. Spin transport is detected for both directions of current flow through the source electrode. The sign of the electrical detection signal is found to vary with the injection current and is correlated with the spin polarization in the GaAs channel determined by optical measurements. These results therefore demonstrate a fully electrical scheme for spin injection, transport, and detection in a lateral semiconductor device.
description: Single PDF file with 4 Figures + supplementary information; submitted to Nature Physics 11/06
Analytical model of millisecond pulsar PSR J0514-4002A
Creators: name: Molla, Sajahan
name: Ghosh, Bidisha
name: Kalam, Mehedi
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We construct a relativistic model for the newly discovered millisecond pulsar PSR J0514 - 4002A located in the globular cluster NGC 1851 (A. Ridolfi, P.C.C. Freire, Y. Gupta, S.M. Ransom, MNRAS 490, 3860 (2019)) by using Tolman VII spacetime. We have obtained central density ($ρ_{0}$), central pressure ($p_{0}$), probable radius, compactness ($u$) and surface redshift ($Z_{s}$) of the above mentioned newly discovered millisecond pulsar, which is very much consistent with reported data. Equation of State (EoS) of the millisecond pulsar has comes out as stiff in nature which is physically acceptable. Not even that our proposed model can analyze most of the millisecond pulsars having masses up to $1.51 M_{\odot}$.
description: 10 pages, 16 figures
Heterotic GUT and Standard Model Vacua from simply connected Calabi-Yau Manifolds
Creators: name: Blumenhagen, Ralph
name: Moster, Sebastian
name: Weigand, Timo
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We consider four-dimensional supersymmetric compactifications of the E8 x E8 heterotic string on Calabi-Yau manifolds endowed with vector bundles with structure group SU(N) x U(1) and five-branes. After evaluating the Green-Schwarz mechanism and deriving the generalized Donaldson-Uhlenbeck-Yau condition including the five-brane moduli, we show that this construction can give rise to GUT models containing U(1) factors like flipped SU(5) or directly the Standard Model even on simply connected Calabi-Yau manifolds. Concrete realizations of three-generation models on elliptically fibered Calabi-Yau manifolds are presented. They exhibit the most attractive features of flipped SU(5) models such as doublet-triplet splitting and proton stability. In contrast to conventional GUT string models, the tree level relations among the Standard Model gauge couplings at the GUT scale are changed.
description: 46 pages, 2 figures, 6 tables; v2: references added, typos corrected; v3: typos corrected, final version published in Nucl.Phys. B
QCD phase diagram: an overview
Creators: name: Stephanov, M. A.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The aim of this review is to summarize the contemporary understanding of the QCD phase diagram as a function of temperature and baryo-chemical potential. The focus is on recent theoretical developments due to lattice simulations of the phase diagram.
description: 15 pages, 7 figures; Plenary talk at 24th International Symposium on Lattice Field Theory (Lattice 2006), Tucson, Arizona, Jul 23-28, 2006
Φωτοκαταλυτική οξείδωση φυτοφαρμάκου Clopyralid:
Creators: name: Καραχανίδου, Σοφία Ιωάννη
Publisher: name: Aristotle University of Thessaloniki
Year: 2014
Subjects: Φωτοκατάλυση
Clopyralid
Φυτοφάρμακο
Photocatalysis
Pesticide

description: Μελετήθηκε η αποικοδόμηση και η ανοργανοποίηση του Clopyrallid, ενός ζιζανιοκτόνου που συχνά απαντάται στο πόσιμο νερό, μέσω της ετερογενούς και ομογενούς φωτοκαταλυτικής οξείδωσης, παρουσία UV-A και ορατού φωτός. Εξετάστηκε η επίδραση διαφόρων παραγόντων, όπως διαφορετικοί εμπορικοί καταλύτες TiO2, η προσθήκη H2O2, το αρχικό pH του διαλύματος, η επίδραση της αρχικής συγκέντρωσης της ουσίας και το αντιδραστήριο photo-Fenton, στην αποικοδόμηση του ζιζανιοκτόνου. Επιπροσθέτως μελετήθηκε και η μείωση του οργανικού φορτίου (DOC) των αποβλήτων που εξετάστηκαν. Η προσθήκη του H2O2 είχε ως αποτέλεσμα, σε όλες τις περιπτώσεις, την αύξηση του ρυθμού αποικοδόμησης του ζιζανιοκτόνου, ενώ παράλληλα η χρήση του TiO2 P25 παρουσία UV-A ακτινοβολίας οδήγησε σε υψηλότερο ρυθμό αποικοδόμησης σε σύγκριση με άλλους εμπορικούς καταλύτες.
description: Degradation and mineralization of Copyralid, a systemic herbicide often reported to occur in drinking water, by heterogeneous and homogeneous photocatalytic oxidation in the presence of UV-A and visible light has been studied. The effect of various operating conditions such as different commercial TiO2 products, the addition of H2O2, the initial pH of the solution, the effect of the initial concentration of the substance and the reagent photo-Fenton, on the degradation of the herbicide. Moreover, the organic content reduction (DOC) of the wastewater was examined. The addition of H2O2 resulted in all cases in higher initial degradation rates of the herbicide, while the use of TiO2 P25 in the presence of UV-A, led to higher initial degradation rates in comparison to other commercial photocatalysts.
Inclusive distributions near kinematic thresholds
Creators: name: Gardi, Einan
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The main challenge in computing inclusive cross sections and decay spectra in QCD is posed by kinematic thresholds. The threshold region is characterized by stringent phase-space constraints that are reflected in large perturbative corrections due to soft and collinear radiation as well as large non-perturbative effects. Major progress in addressing this problem was made in recent years by Dressed Gluon Exponentiation (DGE), a formalism that combines Sudakov and renormalon resummation in moment space. DGE has proven effective in extending the range of applicability of perturbation theory well into the threshold region and in identifying the relevant non-perturbative corrections. Here we review the method from a general perspective using examples from deep inelastic structure functions, event-shape distributions, heavy-quark fragmentation and inclusive decay spectra. A special discussion is devoted to the applications of DGE to radiative and semileptonic B decays that have proven valuable for the interpretation of data from the B factories.
description: 27 pages, 9 figures; mini-review based on talks at ``FRIF workshop on first principles non-perturbative QCD of hadron jets,'' January 12 - 14 2006, Paris; ``Continuous Advances in QCD 2006,'' May 11 - 14, 2006, Minneapolis; and ``First Workshop on Theory, Phenomenology and Experiments in heavy flavour physics,'' May 29 - 31 2006, Capri
Recollecting family stories : narrative construction and meaning in adulthood
Creators: name: Collins, Claudia D.
Publisher: name: University of British Columbia
Year: 2009

description: The purpose of this study was to investigate the relationship between family stories and lives. A family story is defined as a story, tale, or anecdote told orally within a family about family members or family events. Within this study, family stories were examined as second hand tales that a person heard recounted by others. An exploratory case study design was employed to understand the experience and meaning of family stories within the lives of three adult co-researchers who were over the age of 30. Unstructured in-depth interviews designed to elicit prominent family stories were conducted. The stories were audiotaped, transcribed, and analyzed for similarities, contrasts, and complementarities of character, plot, and theme. A hermeneutical framework was then used to examine and interpret the meaning behind the stories. Validation interviews were conducted with each co-researcher to verify the family story meanings and to explore the impact of these themes in the co-researcher's life. The interview material was then rendered into a narrative account, describing each person's family storytelling experiences and related themes of meaning from their own lives. A comparative analysis of the three narrative accounts was conducted to uncover structural and thematic commonalities. The study confirmed the significance of prominent family stories as narrative constructions which offer guidelines for living. A strong convergence was found between family story themes and integral themes from the person's own life story. The results suggest that the family story experience resembles the following structure. Life before the stories was marked by the theme of receptivity resulting from meaning impoverishment. The family story experience itself was characterized by powerful identification (positive or negative) with the stories, which offered significant meaning and interpretive potential to the person. Life after the stories was marked by clarity, guidance and vision, or an integration of the story meanings into lives. Family stories were found to resemble early recollections, in that they serve as metaphors which reflect the personal orientation of the individual. A model for incorporating family stories into a counselling setting (following comparable techniques for working with early recollections) was proposed.
Triggered Star Formation in OB Associations
Creators: name: Chen, W. P.
name: Lee, H. T.
name: Sanchawala, K.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present causal and positional evidence of triggered star formation in bright-rimmed clouds in OB associations, e.g., Ori OB1, and Lac OB1, by photoionization. The triggering process is seen also on a much larger scale in the Orion-Monoceros Complex by the Orion-Eridanus Superbubble. We also show how the positioning of young stellar groups surrounding the H II region associated with Trumpler 16 in Carina Nebula supports the triggering process of star formation by the collect-and-collapse scenario.
description: 4 pages, 3 figures, IAU Symposium 237 Proceedings paper
Θρησκεία και Κοινωνία κατά τον Max Weber:
Creators: name: Χρυσανθίδου, Ελένη Στεφάνου
Publisher: name: Aristotle University of Thessaloniki
Year: 2014
Subjects: subject: Μαξ Βέμπερ
subject: Θρησκεία
subject: Κοινωνιολογια
subject: Max Weber
subject: Religion
subject: Sociology
subject: FOS: Sociology

description: Σκοπός της διατριβής ήταν η μελέτη των απόψεων του κλασσικού κοινωνιολόγου Max Weber σχετικά με την επιρροή των διαφόρων παγκοσμίων θρησκειών, στην κοινωνία, την οικονομία και την πολιτική. Αρχικά εξετάσαμε τον συσχετισμό του Προτεσταντισμού με την εμφάνιση του καπιταλισμού στην Δύση μέσω του Λουθηρανισμού και του Καλβινισμού, όπως ο Weber τον εντόπισε στο φημισμένο έργο του ‘Η προτεσταντική ηθική και το πνεύμα του καπιταλισμού’. Στη συνέχεια παρουσιάσαμε την μελέτη του σχετικά με την επιρροή των θρησκειών της Κίνας, όπως του Κομφουκιανισμού και του Ταοισμού, στην κοινωνική δομή του κινεζικού κράτους. Στο ίδιο σημείο παρουσιάσαμε και τις ομοιότητες και τις διαφορές ανάμεσα στον Κομφουκιανισμό και τον Πουριτανισμό. Παρακάτω αναφερθήκαμε στην αντίστοιχη επίδραση των θρησκειών της Ινδίας, όπως του Ινδουισμού και του Βουδισμού, στην κοινωνία, την ομαδοποίηση των καστών και το οικονομικό σύστημα της Ινδίας. Τέλος, ένα επιπλέον θέμα που θίξαμε ήταν η έρευνα του Μax Weber σχετικά με τον Αρχαίο Ιουδαισμό και την σύνδεσή του με τον Φαρισαικό Ιουδαισμό και τον Πρώιμο Χριστιανισμό, κυρίως αναφορικά με το προφητικό χάρισμα μέσω ιστορικών αναφορών.
description: The aim of the present thesis was the study of the classic sociologist’s Max Weber views concerning the influence of the various worldly religions in the society, the economy and politics. At first we examined the relation between Protestantism and the appearance of capitalism in the West through Lutheranism and Calvinism, as Weber detected it in his famous work ‘The Protestant ethic and the Spirit of Capitalism’. Then we presented the research about the influence of the religions of China, such as Confucianism and Taoism in the social structure of the Chinese state. In the same section we also presented the similarities and differences between Confucianism and Puritanism. Furthermore we referred to the influence of Indian religions, such as Hinduism and Buddhism in the society, the caste grouping and the economic system of India. Finally, an additional issue that we raised was Max Weber’s study on Ancient Judaism and its connection with the Pharisee Judaism and Early Christianity, particularly in terms of the prophetic charisma through historical references.
A disk-dominated and clumpy circumgalactic medium of the Milky Way seen in X-ray emission
Creators: name: Kaaret, P.
name: Koutroumpa, D.
name: Kuntz, K. D.
name: Jahoda, K.
name: Bluem, J.
name: Gulick, H.
name: Hodges-Kluck, E.
name: LaRocca, D. M.
name: Ringuette, R.
name: Zajczyk, A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The Milky Way galaxy is surrounded by a circumgalactic medium (CGM) that may play a key role in galaxy evolution as the source of gas for star formation and a repository of metals and energy produced by star formation and nuclear activity. The CGM may also be a repository for baryons seen in the early universe, but undetected locally. The CGM has an ionized component at temperatures near $2 \times 10^{6}$~K studied primarily in the soft X-ray band. Here we report a survey of the southern Galactic sky with a soft X-ray spectrometer optimized to study diffuse soft X-ray emission. The X-ray emission is best fit with a disc-like model based on the radial profile of the surface density of molecular hydrogen, a tracer of star formation, suggesting that the X-ray emission is predominantly from hot plasma produced via stellar feedback. Strong variations in the X-ray emission on angular scales of $\sim10^{\circ}$ indicate that the CGM is clumpy. Addition of an extended, and possibly massive, halo component is needed to match the halo density inferred from other observations.
description: Published in Nature Astronomy, 18 pages
Aspects of metallic low-temperature transport in Mott-insulator/ band-insulator superlattices: optical conductivity and thermoelectricity
Creators: name: Ruegg, Andreas
name: Pilgram, Sebastian
name: Sigrist, Manfred
Publisher: name: arXiv
Year: 2008
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We investigate the low-temperature electrical and thermal transport properties in atomically precise metallic heterostructures involving strongly-correlated electron systems. The model of the Mott-insulator/ band-insulator superlattice was discussed in the framework of the slave-boson mean-field approximation and transport quantities were derived by use of the Boltzmann transport equation in the relaxation-time approximation. The results for the optical conductivity are in good agreement with recently published experimental data on (LaTiO$_3)_N$/(SrTiO$_3)_M$ superlattices and allow us to estimate the values of key parameters of the model. Furthermore, predictions for the thermoelectric response were made and the dependence of the Seebeck coefficient on model parameters was studied in detail. The width of the Mott-insulating material was identified as the most relevant parameter, in particular, this parameter provides a way to optimize the thermoelectric power factor at low temperatures.
Efficient quantum gate teleportation in higher dimensions
Creators: name: de Silva, Nadish
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: Mathematical Physics (math-ph)
subject: Representation Theory (math.RT)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: The Clifford hierarchy is a nested sequence of sets of quantum gates critical to achieving fault-tolerant quantum computation. Diagonal gates of the Clifford hierarchy and 'nearly diagonal' semi-Clifford gates are particularly important: they admit efficient gate teleportation protocols that implement these gates with fewer ancillary quantum resources such as magic states. Despite the practical importance of these sets of gates, many questions about their structure remain open; this is especially true in the higher-dimensional qudit setting. Our contribution is to leverage the discrete Stone-von Neumann theorem and the symplectic formalism of qudit stabiliser mechanics towards extending results of Zeng-Cheng-Chuang (2008) and Beigi-Shor (2010) to higher dimensions in a uniform manner. We further give a simple algorithm for recursively enumerating all gates of the Clifford hierarchy, a simple algorithm for recognising and diagonalising semi-Clifford gates, and a concise proof of the classification of the diagonal Clifford hierarchy gates due to Cui-Gottesman-Krishna (2016) for the single-qudit case. We generalise the efficient gate teleportation protocols of semi-Clifford gates to the qudit setting and prove that every third level gate of one qudit (of any prime dimension) and of two qutrits can be implemented efficiently. Numerical evidence gathered via the aforementioned algorithms support the conjecture that higher-level gates can be implemented efficiently.
description: Draft version. Comments, questions, & corrections welcome
Light-Induced Magnetic Precession in (Ga,Mn)As Slabs: Hybrid Standing-Wave Damon-Eshbach Modes
Creators: name: Wang, D. M.
name: Ren, Y. H.
name: Liu, X.
name: Furdyna, J. K.
name: Grimsditch, M.
name: Merlin, R.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Coherent oscillations associated with spin precessions were observed in ultrafast optical experiments on ferromagnetic (Ga,Mn)As films. Using a complete theoretical description of the processes by which light couples to the magnetization, values for the exchange and anisotropy constants were obtained from the field-dependence of the magnon frequencies and the oscillation-amplitude ratios. Results reveal a relatively large negative contribution to the energy due to surface anisotropy leading to excitations that are a mixture of bulk waves and surface modes.
description: 17 pages, 4 figures
Μέτρα σε δίκτυα: ιδιότητες και εφαρμογές:
Creators: name: Γρηγοριάδης, Ιωάννης Λάζαρου
Publisher: name: Aristotle University of Thessaloniki
Year: 2014
Subjects: Δίκτυα
Τυχαία γραφήματα
Μέτρα κεντρικότητας
Networks
Random graphs
Centrality measures

description: Ο τομέας των δικτύων είναι ένας σχετικά πρόσφατος και ραγδαία αναπτυσσόμενος τομέας. Με το πέρασμα των χρόνων, διάφορα είδη δικτύων εισβάλουν ολοένα και περισσότερο στην καθημερινή μας ζωή. Έτσι, η κατανόηση τους και η ενασχόληση με αυτά παρουσιάζει μεγάλο ενδιαφέρον. Κύριο αντικείμενο μελέτης των δικτύων αποτελεί η σημαντικότητα κάθε κόμβου και ο ρόλος του μέσα στο δίκτυο. Η σημαντικότητα των κόμβων εκτιμάται μέσω της κεντρικότητας τους, η οποία ορίζεται με διάφορους τρόπους. Η παρούσα εργασία λοιπόν, επιχειρεί να εμβαθύνει σε όλα τα παραπάνω πεδία με στόχο την αποσαφήνιση της κεντρικότητας σε δίκτυα, τόσο θεωρητικά όσο και μέσω παραδειγμάτων, καθώς και να παρουσιάσει ένα διαφορετικό τρόπο δημιουργίας δικτύων και τη συσχέτιση τους με τα πραγματικά δίκτυα.
description: The field of networks is a relatively recent and rapidly growing sector. Over the years, various types of networks are increasingly invading our daily lives. Thus, dealing with them is very interesting. The main object of networks’study is the importance of each node and its role in the network. The significance of nodes is evaluated by centrality, which is defined in various ways. Therefore, this paper seeks to deepen in all these areas with the aim of clarifying the centrality in networks, both theoretically and through examples, and to present a different way of creating networks and correlation with real networks.
On recursive estimation for time varying autoregressive processes
Creators: name: Moulines, Eric
name: Priouret, Pierre
name: Roueff, François
Publisher: name: arXiv
Year: 2006
Subjects: subject: Statistics Theory (math.ST)
subject: FOS: Mathematics
subject: 62M10, 62G08, 60J27 (Primary) 62G20 (Secondary)

description: This paper focuses on recursive estimation of time varying autoregressive processes in a nonparametric setting. The stability of the model is revisited and uniform results are provided when the time-varying autoregressive parameters belong to appropriate smoothness classes. An adequate normalization for the correction term used in the recursive estimation procedure allows for very mild assumptions on the innovations distributions. The rate of convergence of the pointwise estimates is shown to be minimax in $β$-Lipschitz classes for $0
description: Published at http://dx.doi.org/10.1214/009053605000000624 in the Annals of Statistics (http://www.imstat.org/aos/) by the Institute of Mathematical Statistics (http://www.imstat.org)
Το χιούμορ στις εταιρικές σελίδες Facebook : Μία διαπολιτισμική μελέτη στην Ελλάδα και το Ην. Βασίλειο.:
Creators: name: Γκοτζαμπουγιούκη, Μαρία Στυλιανού
Publisher: name: Aristotle University of Thessaloniki
Year: 2014
Subjects: Χιούμορ
Κοινωνικό Δίκτυο
Διαπολιτισμική μελέτη
Humor
Social Network
Cross-cultural study

description: Το χιούμορ έχει εξελιχθεί σε κοινή πρακτική στο χώρο του μάρκετινγκ και της διαφήμισης , ενώ παράλληλα συνιστά ένα ισχυρό σύμμαχο των επιχειρήσεων στην προσπάθεια τους να προσελκύσουν το ενδιαφέρον των καταναλωτών. Επιπλέον τα κοινωνικά δίκτυα ενσωματώνονται ολοένα και περισσότερο στην επικοινωνιακή στρατηγική των επιχειρήσεων, αποτελώντας πολύτιμο όπλο για την ανάπτυξη σταθερών σχέσεων με τους πελάτες. Η κουλτούρα ακόμα συνιστά έναν παράγοντα, ο οποίος επηρεάζει τις πτυχές της ζωής των ατόμων, ενώ φαίνεται από τη βιβλιογραφία ότι κατευθύνει τη χρήση του χιούμορ και των κοινωνικών δικτύων. Η παρούσα εργασία λοιπόν επιχειρεί να συνδυάσει τις τρεις παραπάνω διαστάσεις, μελετώντας τη χρήση και αποτελεσματικότητα του χιούμορ στις εταιρικές κοινωνικές σελίδες Facebookγια την Ελλάδα και το Ην. Βασίλειο.
description: Humor has become a common practice in the field of marketing andadvertising, while is a powerful ally in businesseffort to attract consumer interest. Furthermore social networks are increasingly integrated on communicatingbusiness strategy, making them a valuable tool in the development of stable relationships with customers. The culture still constitutes an agentwhich affects aspects of people's lives, and it seems from the literaturethat directs the use of humor and social networks. The presentwork therefore attempts to combine these three dimensions, studying theuse and effectiveness of humor in corporate Facebook pages for Greece and UK.