cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Heteropolymer translocation through nanopores
Creators: name: Luo, Kaifu
name: Ala-Nissila, Tapio
name: Ying, See-Chen
name: Bhattacharya, Aniket
Publisher: name: arXiv
Year: 2007
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We investigate the translocation dynamics of heteropolymers driven through a nanopore using a constant temperature Langevin thermostat. Specifically, we consider heteropolymers consisting of two types of monomers labeled A and B, which are distinguished by the magnitude of the driving force that they experience inside the pore. From a series of studies on polymers with sequences AnBn+m we identify both universal as well as sequence specific properties of the translocating chains. We find that the scaling of the average translocation time as a function of the chain length N remains unaffected by the heterogeneity, while the residence time of each bead is a strong function of the sequence for short repeat units. We further discover that for a symmetric heteropolymer AnBn of fixed length, the pattern exhibited by the residence time of the individual monomer has striking similarity with an interference pattern for an optical grating with N/(2n) slits. These results are relevant for designing nanopore based sequencing techniques.
description: 13 Pages, 6 Figures
A Suzaku sample of unabsorbed narrow-line and broad-line Seyfert 1 galaxies: I. X-ray spectral properties
Creators: name: Waddell, Sophia G. H.
name: Gallo, Luigi C.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: A sample of narrow-line (NLS1) and broad-line Seyfert 1 (BLS1) galaxies observed with Suzaku is presented. The final sample consists of 22 NLS1s and 47 BLS1s, for a total of 69 AGN that are all at low redshift (z<0.5) and exhibit low host galaxy column densities (<10^22 cm^-2). The average spectrum for each object is fit with a toy model to characterise important parameters, including the photon index, soft excess, Compton hump (or hard excess), narrow iron line strength, luminosity and X-ray Eddington ratio (L_x/L_Edd). We confirm previous findings that NLS1s have steeper power laws and higher X-ray Eddington ratios, but also find that NLS1 galaxies have stronger soft and hard excesses than their BLS1 counterparts. Studying the correlations between parameters shows that the soft and hard excesses are correlated for NLS1 galaxies, while no such correlation is observed for BLS1s. Performing a principal component analysis (PCA) on the measured X-ray parameters shows that while the X-ray Eddington ratio is the main source of variations within our sample (PC1), variations in the soft and hard excesses form the second principal component (PC2) and it is dominated by the NLS1s. The correlation between the soft and hard excess in NLS1 galaxies may suggest a common origin for the two components, such as a blurred reflection model. The presented Suzaku sample of Seyfert 1 galaxies is a useful tool for analysis of the X-ray properties of AGN, and for the study of the soft and hard excesses observed in AGN.
description: Accepted for publication in MNRAS Main Journal
Surimi-based product development and viscous properties of surimi paste
Creators: name: Bouraoui, Moez Mohamed
Publisher: name: University of British Columbia
Year: 2009

description: Raman spectroscopy was used to study the protein structure in raw and salted surimi from Pacific whiting, and in gels formed by setting (32°C), cooking (86°C) or setting followed by cooking. The intensity of the peaks assigned to disulfide bond stretching vibrations increased considerably in the cooked and set-cooked gels. A smaller increase was found in the gels that were subject to setting alone. Secondary structure estimation based on the amide I band indicated a change from predominantly a-helical structure in raw surimi to similar proportions of a-helical and anti-parallel p-sheet after setting. A further increase in anti-parallel p-sheet and decrease in a-helix content occurred during the kamaboko stage. The intensity of C-H stretching vibrations of the aliphatic residues decreased after salting, setting and cooking. The set and cooked gel had a better gel strength and fold score than the cooked gel which, in turn, had better properties than the set gel. Response surface methodology was used to determine the optimal setting and cooking time and temperature conditions resulting in a maximized gel strength, fold score and color, (whiteness index), and a minimized gel expressible liquid. Cooking temperature was the variable that had the strongest influence on the gel quality characteristics. Level set programming, a global optimization method, gave essentially the same results as a gradient based optimization method. The results obtained by these two methods were better than those generated by the Simplex technique. Using a formulation composed of pink salmon surimi, salt, whey protein concentrate and wheat starch, an optimal final product, kamaboko sausage, was developed. In addition, when this formulation was applied to herring surimi, the kamaboko obtained had similar gel strength and elasticity as a commercial surimi-based product. The effects of frozen storage conditions of roe herring on its gel making ability (GMA) were investigated. Frozen storage at around -45°C maintained the GMA for seventy days while storage at -83°C further increased the GMA period. The viscous properties of a salmon surimi paste were studied using a rotational viscometer. The paste behaved as a shear thinning fluid with a yield stress that increased with temperature up to 21 °C. Viscosity also increased with temperature up to 21 °C, possibly because of protein-protein interactions. The Theological data were reasonably well represented by a simple model which takes into consideration the effects of both shear rate and temperature.
Ανάπτυξη της επαναληπτικής μεθόδου συζυγών κλίσεων για την επίλυση γραμμικών εξισώσεων και χρήση τεχνικών προρρύθμισης για την βελτίωση του ρυθμού σύγκλισης της:
Creators: name: Μωραΐτη, Ρεβέκα Αλέξανδρου
Publisher: name: Aristotle University of Thessaloniki
Year: 2012
Subjects: Μέθοδος συζυγών κλίσεων
Ρυθμός σύγκλισης
Γραμμικά συστήματα
Αραιοί πίνακες
Προρρυθμιστές
Conjugate gradient method
Rate of convergence
Linear systems
Sparse matrices
Preconditioners

description: Αντικείμενο της παρούσας διπλωματικής εργασίας είναι η ανάπτυξη μιας επαναληπτικής μεθόδου για την επίλυση αραιών, μεγάλης κλίμακας γραμμικών συστημάτων που προκύπτουν απ’ την εφαρμογή της μεθόδου Συζυγών Κλίσεων (Conjugate Gradient method). Στο πρώτο κεφάλαιο δίνονται κάποιες βασικές έννοιες, όσον αφορά τα γραμμικά συστήματα, αραιά ή πλήρη και τα είδη αριθμητικών μεθόδων (άμεσων ή επαναληπτικών) για την επίλυσή τους. Επίσης, τονίζεται η αποτελεσματικότητα της μεθόδου αυτής σε σχέση με άλλες επαναληπτικές μεθόδους. Στο δεύτερο κεφάλαιο παρουσιάζεται, αναλυτικά η CG μέθοδος, η προέλευση της, καθώς επίσης και η δομή της. Στη συνέχεια δίνονται οι τροποποιήσεις της μεθόδου. Το ενδιαφέρον επικεντρώνεται περισσότερο στις τεχνικές προρρύθμισης της CG μεθόδου, οι οποίες προσφέρουν ταχύτερη σύγκλιση στο προς επίλυση γραμμικό σύστημα. Τέλος, στα κεφάλαια 4, 5, 6 παρατίθενται υλοποιήσεις, χρήσεις της μεθόδου σε MATLAB και SCILAB, όπως επίσης παραδείγματα και εφαρμογές της. Επίσης, διατυπώνονται συμπεράσματα και προτείνονται ιδέες για μελλοντικές εφαρμογές.
description: The subject of the current thesis is the development of an iterative method for the solution of large, sparse linear systems. The iterative method we examine is the Conjugate Gradient method (with and without preconditioner). In the first section, we present basic principles about sparse or dense linear systems and two types of numerical methods (direct and iterative), which can be used to solve systems of linear equations. Also, we underline the efficiency of CG method comparing with other iterative methods. The second section refers extensively to the CG method, the structure of its algorithm and its derivation. The following section introduces several modifications of the method. Basically, we focus on the preconditioning techniques of CG method, which provide faster convergence to the linear system. Sections 4, 5 and 6 display method’s realizations, its syntax and description on MATLAB and SCILAB and some numerical experiments and implementations using CG method with and without preconditioning. Furthermore, we express conclusions and we propose some ideas for future research.
Влияние сорбционной терапии на белковый обмен у телят при диарейном синдроме
Creators: name: Воронова К.А.
name: Клетикова Л.В.
Publisher: name: Эффективное животноводство
Year: 2021
Subjects: телята
диарейный синдром
энтеросорбент
белковый и аминокислотный обмен
calves
diarrheal syndrome
enterosorbent
protein and amino acid metabolism

description: В статье приведены результаты терапии молодняка крупного рогатого скота с диарейным синдромом. Применение энтеросорбента на основе полиметилсилоксана полигидрата в дозе 0,5 г/кг массы за 1 час до кормления дважды в день способствовало нормализации пищеварения через 3 дня, при этом у телят снизилась концентрация общего белка на 10,7%, креатинина на 40,37%, общего билирубина на 52,01% и увеличился уровень мочевины на 58,8% (р≤0,05). Следовательно, энтеросорбент способствует восстановлению гидробаланса, улучшению барьерной функции печени и стимуляции морфо-функциональной активности пищеварительного тракта.
description: In the article, the results of treatment of young cattle with diarrheal syndrome are finicky. The use of an enterosorbent based on polymethylsiloxane polyhydrate at a dose of 0.5 g/kg body weight 1 hour before feeding twice a day contributed to the normalization of digestion after 3 days, while the concentration of total protein in calves decreased by 10.7%, creatinine by 40.37%, total bilirubin by 52.01% and the urea level increased by 58.8% (p≤0.05). Therefore, the enterosorbent helps to restore the hydrobalance, improve the barrier function of the liver and stimulate the morpho-functional activity of the digestive tract.
A supercritical series analysis for the generalized contact process with diffusion
Creators: name: Dantas, W. G.
name: Stilck, J. F.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We study a model that generalizes the CP with diffusion. An additional transition is included in the model so that at a particular point of its phase diagram a crossover from the directed percolation to the compact directed percolation class will happen. We are particularly interested in the effect of diffusion on the properties of the crossover between the universality classes. To address this point, we develop a supercritical series expansion for the ultimate survival probability and analyse this series using d-log Padé and partial differential approximants. We also obtain approximate solutions in the one- and two-site dynamical mean-field approximations. We find evidences that, at variance to what happens in mean-field approximations, the crossover exponent remains close to $ϕ=2$ even for quite high diffusion rates, and therefore the critical line in the neighborhood of the multicritical point apparently does not reproduce the mean-field result (which leads to $ϕ=0$) as the diffusion rate grows without bound.
Συνδημιουργία αξίας στο διαδίκτυο και ο ρόλος του χρήστη:
Creators: name: Παπαδοπούλου, Αθηνά Κλήμη
Publisher: name: Aristotle University of Thessaloniki
Year: 2012
Subjects: Προτεινόμενη αξία
Αξία μέσω χρήσης
Web 2.0 τεχνολογίες
Διάδραση
Ομάδες εστίασης
Co creation of value
Value proposition
Value in use
Web 2.0 technology
Interaction
Focus groups

description: Σκοπός της παρούσας εργασίας είναι να μελετήσει το φαινόμενο της συνδημιουργίας αξίας (co creation of value) που παρατηρείται με την διάδραση των χρηστών του διαδικτύου με άλλους χρήστες, με τα συστήματα και με τις υπηρεσίες οι οποίες ενισχύονται από τις “Web 2.0 τεχνολογίες”. Προκειμένου να προσδιορισθεί κατά πόσο οι χρήστες των διαδικτυακών υπηρεσιών αντιλαμβάνονται το ρόλο τους και κατανοούν πως η εξυπηρέτηση που απολαμβάνουν εξαρτάται και από τη δική τους προσπάθεια, διεξήχθη μία έρευνα με ομάδες εστίασης μέσω της υπηρεσίας κοινωνικής δικτύωσης που προσφέρει η ιστοσελίδα του Facebook. Οι συμμετέχοντες είχαν την ευκαιρία να ανταλλάξουν απόψεις και εμπειρίες σε σχέση με εργαλεία και λειτουργίες που έχουν στη διάθεση τους και βοηθούν το χρήστη να οργανώσει και να εξατομικεύσει το τελικό αποτέλεσμα που εισπράττει μέσα από την οθόνη του. Η κύρια συνεισφορά της παρούσας έρευνας είναι η μελέτη αντίληψης των χρηστών της ιστοσελίδας για την ευθύνη που τους αναλογεί σε σχέση με την αξία μέσω χρήσης (value in use) που απολαμβάνουν. Για να γίνει κατανοητό αυτό είναι απαραίτητα το εννοιολογικό πλαίσιο το οποίο ορίζει την έννοια της αξίας υπό το πρίσμα της λογικής της κυριαρχίας της υπηρεσίας (service dominant logic) και το εννοιολογικό πλαίσιο το οποίο περιγράφει τη σύγχρονη μορφή του διαδικτύου και τον παράγοντα άνθρωπο.
description: The purpose of this thesis is to study the phenomenon of co creation of value which can be identified in the interaction among Internet users and also in the interaction between user and service systems that are enhanced by “Web 2.0 technology”. In order to be determined whether the users of Internet services realize their part and understand that the service they wish to use depends partially on their own effort, the author conducted a research based on focus groups via the social networking service which is being offered by Facebook. The participants had the chance to comment upon tools and features that they use as Facebook users and help them organize and customize the result of their profile and their account. Before citing the conclusions it is important to analyze the meaning of value in use as it is being presented by the service dominant logic. Finally, it is equally important to understand the significance of the human factor on Web development.
Non-destructive visualization of short circuits in lithium-ion batteries by magnetic field imaging system
Creators: name: Suzuki, Shogo
name: Okada, Hideaki
name: Yabumoto, Kai
name: Matsuda, Seiju
name: Mima, Yuki
name: Kimura, Noriaki
name: Kimura, Kenjiro
Publisher: name: arXiv
Year: 2020
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: To develop a high-density and long-life lithium-ion battery, a technology is needed that allows non-destructive visualization of the spatial distribution of deteriorated parts after cycle test. In the present study, we measured the distribution of the magnetic field leaking from the lithium-ion battery during its operation. Based on the measurement results, we evaluated the current density distribution inside a battery using the electric current reconstruction process. With respect to the changes in an internal state of the lithium-ion battery associated with cycle deterioration, we successfully visualized the spatial changes in the conductivity distribution inside the lithium-ion battery.
description: 11 pages, 5 figures, letter
Strategies for Effective Family Violence Education Research Brief
Creators: name: Pfitzner, Naomi
Publisher: name: Monash University
Year: 2021
Subjects: subject: Sociology
subject: FOS: Sociology

description: The recent Victorian Royal Commission into Family Violence (VRCFV) identified family violence education as a priority focus for workforce development across health, education, community and justice sectors. In response to these recommendations, the Victorian Government announced a $95.4 million-dollar investment in workforce education and launched a 10-year Industry Plan that aims to ensure that workers across health, education, community and justice services are family violence literate and have the requisite skills for their roles in preventing, identifying and responding to family violence (Family Safety Victoria, 2017; Victorian Government, n.d.).
Μπαεζιανή Επεξεργασία Σήματος:
Creators: name: Υψηλάντη, Κυριακή-Παρασκευή Στυλιανού
Publisher: name: Aristotle University of Thessaloniki
Year: 2012
Subjects: Αλυσίδες Markov Monte Carlo (MCMC)
Δειγματοληψία Gibbs
Αποκατάσταση σήματος
Markov Chain Monte Carlo (MCMC)
Gibbs sampling
Denoising

description: H Μπαεζιανή συναγωγή χρησιμοποιείται για την εξαγωγή συμπερασμάτων σε προβλήματα στατιστικής για τα οποία γνωρίζουμε την κατανομή των παρατηρήσεων, αλλά δεν έχουμε καμία πληροφορία για την κατανομή των παραμέτρων. Αποδίδοντας υποθετικές κατανομές στις παραμέτρους, υπολογίζεται η εκ των υστέρων πιθανότητα των παραμέτρων αυτών δεδομένων των παρατηρήσεων, με δειγματοληψία της υποτιθέμενης κατανομής και της κατανομής των παρατηρήσεων. Η δειγματοληψία γίνεται με αλυσίδες Markov Monte Carlo και συγκεριμένα με τη μέθοδο δειγματοληψίας Gibbs. Οι αλυσίδες Markov Monte Carlo επιτρέπουν την προσωμοίωση πολύπλοκων υπολογιστικών μοντέλων για την ευκολότερη επεξεργασία των δεδομένων με πιο ρεαλιστικά στατιστικά μοντέλα. Πειραματικά, καταλήγουμε στην κατανομή που περιγράφει καλύτερα την συνάρτηση πυκνότητας πιθανότητας των παρατηρήσεων. Κατά την Μπαεζιανή επεξεργασία σημάτων, χρησιμοποιείται η Μπαεζιανή συναγωγή για την εκτίμηση της συνάρτησης πυκνότητας πιθανότητας των παραμέτρων του θορύβου που προστίθεται σε ένα σήμα δεδομένου του τελικού παραμορφωμένου σήματος, με σκοπό την αποκατάστασή του.
description: Bayezian Inference is used to draw conclusions on statistical problems for which we know the distribution of observations but we have no information on the distribution of the parameters. Attaching hypothetical distributions in parameters, we can estimate the posterior distribution of these parameters given the observations by generating samples from the proposal distribution and the distribution of observations. Sampling is taking place with Markov Chain Monte Carlo methods, particularly with Gibbs Sampler. Markov Chain Monte Carlo methods enable the simulation of complicated computational models, in order to make the data examination easier, using more realistic statistical models. Experimentally, we obtain the distribution that best describes the probability density function of the observations.In Bayezian signal processing, given a noisy signal we use Bayezian Inference to estimate the probability density function of noise parameters added to the signal, in order to estimate the clear sequence.
Quantization of perturbations during inflation in the 1+3 covariant formalism
Creators: name: Pitrou, Cyril
name: Uzan, Jean-Philippe
Publisher: name: arXiv
Year: 2007
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: This note derives the analogue of the Mukhanov-Sasaki variables both for scalar and tensor perturbations in the 1+3 covariant formalism. The possibility of generalizing them to non-flat Friedmann-Lemaitre universes is discussed.
description: 4 pages: v2 has minor changes to match published version
Nuclear expansion and symmetry energy of hot nuclei
Creators: name: Shetty, D. V.
name: Souliotis, G. A.
name: Galanopoulos, S.
name: Kohley, Z.
name: Soisson, S. N.
name: Stein, B. C.
name: Wuenschel, S.
name: Yennello, S. J.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The decrease in the symmetry energy of hot nuclei populated in $^{58}$Ni + $^{58}$Ni, $^{58}$Fe + $^{58}$Ni and $^{58}$Fe + $^{58}$Fe reactions at beam energies of 30, 40, and 47 MeV/nucleon, as a function of excitation energy is studied. It is observed that this decrease is mainly a consequence of increasing expansion or decreasing density rather than the increasing temperature. The results are in good agreement with the recently reported microscopic calculation based on the Thomas-Fermi approach. An empirical relation to study the symmetry energy of finite nuclei in various mass region is proposed.
description: 10 pages, 2 figures
Electron cooling by phonons in superconducting proximity structures
Creators: name: Nikolić, Danilo
name: Basko, Denis M.
name: Belzig, Wolfgang
Publisher: name: arXiv
Year: 2020
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We investigate the electron-phonon cooling power in disordered electronic systems with a special focus on mesoscopic superconducting proximity structures. Employing the quasiclassical Keldysh Green's function method, we obtain a general expression for the cooling power perturbative in the electron-phonon coupling, but valid for arbitrary electronic systems out of equilibrium. We apply our theory to several disordered electronic systems valid for an arbitrary relation between the thermal phonon wavelength and the electronic mean free path due to impurity scattering. Besides recovering the known results for bulk normal metals and BCS superconductors, we consider two experimentally relevant geometries of superconductor-normal metal proximity contacts. Both structures feature a significantly suppressed cooling power at low temperatures related to the existence of a minigap in the quasiparticle spectrum. This improved isolation low cooling feature in combination with the high tunability makes such structures highly promising candidates for quantum calorimetry
description: 14 pages, 9 figures, submitted to PRB
Active Learning Methods for Efficient Hybrid Biophysical Variable Retrieval
Creators: name: Verrelst, ochem
name: Dethier, Sara
name: Rivera, Juan Pablo
name: Muñoz-Marí, Jordi
name: Camps-Valls, Gustau
name: Moreno, José
Publisher: name: arXiv
Year: 2020
Subjects: subject: Signal Processing (eess.SP)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Image and Video Processing (eess.IV)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: Kernel-based machine learning regression algorithms (MLRAs) are potentially powerful methods for being implemented into operational biophysical variable retrieval schemes. However, they face difficulties in coping with large training datasets. With the increasing amount of optical remote sensing data made available for analysis and the possibility of using a large amount of simulated data from radiative transfer models (RTMs) to train kernel MLRAs, efficient data reduction techniques will need to be implemented. Active learning (AL) methods enable to select the most informative samples in a dataset. This letter introduces six AL methods for achieving optimized biophysical variable estimation with a manageable training dataset, and their implementation into a Matlab-based MLRA toolbox for semi-automatic use. The AL methods were analyzed on their efficiency of improving the estimation accuracy of leaf area index and chlorophyll content based on PROSAIL simulations. Each of the implemented methods outperformed random sampling, improving retrieval accuracy with lower sampling rates. Practically, AL methods open opportunities to feed advanced MLRAs with RTM-generated training data for development of operational retrieval models.
Linear waves around static dyon solution of nonlinear electrodynamics
Creators: name: Chernitskii, Alexander A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Nonlinear electrodynamics model in hypercomplex form is considered. Its linearization around a solution is obtained. The appropriate problem for linear waves around static dyon solution (SDS) of Born-Infeld electrodynamics is investigated. Two types of wave scattering on SDS are considered: dissipative (with momentum transmission from plane wave to SDS) and non-dissipative (for SDS imbedded to an equilibrium wave background). Resonance phenomenon in the problem is discovered and some resonance frequencies are obtained by using a numerical method. The form of resonance wave modes are discussed. The sum of a plane wave (as the elementary component of the wave background) with one resonance mode is considered. The appropriate energy density is investigated at infinity. The averaged energy density is demonstrated to have the term proportional to inverse radius. This fact allow to consider such field configurations as the cause of gravitational interaction, taking into account the effective Riemann space effect discovered in my previous works. A behavior of the linearized solution at origin of coordinates and the problem beyond the linearization are discussed.
description: 31 pages, 2 black-and-white figures (coloured figures see in version 1), published version
Maximal subsets free of arithmetic progressions in arbitrary sets
Creators: name: Semchankau, Aliaksei
Publisher: name: arXiv
Year: 2020
Subjects: subject: Combinatorics (math.CO)
subject: Number Theory (math.NT)
subject: FOS: Mathematics

description: We consider the problem of determining the maximum cardinality of a subset containing no arithmetic progressions of length $k$ in a given set of size $n$. It is proved that it is sufficient, in a certain sense, to consider the interval $[1,\dots, n]$. The study continues the work of Komlós, Sulyok, and Szemerédi.
description: 8 pages
MPEC 2024-A17 : 2023 YY1
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2024
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469
subject: 2023 YY1

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.
Crossover from reptation to Rouse dynamics in a one-dimensional model
Creators: name: Drzewinski, Andrzej
name: van Leeuwen, J. M. J.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: A simple one-dimensional model is constructed for polymer motion. It exhibits the crossover from reptation to Rouse dynamics through gradually allowing hernia creation and annihilation. The model is treated by the density matrix technique which permits an accurate finite-size-scaling analysis of the behavior of long polymers.
description: 5 Pages RevTeX and 5 PostScript figures included (to appear in Physical Review E)
Πρόγραμμα παρέμβασης μέσω υπολογιστή για ασθενείς με Αλτσχάιμερ επικεντρωμένο στην προσοχή
Creators: name: Κυροπούλου, Κλεοπάτρα Γρηγορίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2012
Subjects: Γνωστική εκπαίδευση
Νόσος Αλτσχάιμερ
Πρόγραμμα παρέμβασης μέσω υπολογιστή
Cognitive training
Alzheimer’s disease
Computer based intervention program

description: Τα τελευταία χρόνια η νόσος Αλτσχάιμερ είναι μια ασθένεια που απασχολεί ιδιαίτερα την ιατρική κοινότητα, καθώς όλο και πιο συχνά κάνει την εμφάνιση της στους ηλικιωμένους ανθρώπους. Όπως αποδεικνύεται, η εξάσκηση του νου του ανθρώπου (γνωστική εκπαίδευση) πριν εμφανιστούν συμπτώματα, όταν είναι ακόμα υγιής, αλλά και αφού εμφανίσει συμπτώματα, είναι πολύ ευεργετική. Όσο ο ανθρώπινος νους εξασκείται, τόσο μικρότερες πιθανότητες έχει να εμφανίσει την ασθένεια, ή είναι πιο εύκολο να την καθυστερήσει ή να την αναστρέψει. Η εξάσκηση του νου στην Ελλάδα γίνεται σε ειδικά κέντρα, με ασκήσεις παρέμβασης με τη μέθοδο «χαρτί και μολύβι». Η παρούσα εργασία αποτελεί την έναρξη μιας προσπάθειας μεταφοράς των προγραμμάτων παρέμβασης από τα παραδοσιακά μέσα στον υπολογιστή, εμπλουτισμένα με πολυμέσα και διαδράσεις που είναι αδύνατον να υλοποιηθούν με χαρτί και μολύβι. Τα προγράμματα παρέμβασης μέσω υπολογιστή μπορούν να εκμεταλλευτούν όλες τις δυνατότητες του, προσαρμόζοντας τα επίπεδα δυσκολίας της άσκησης, την ταχύτητα, τις εικόνες, επιτρέποντας τη χρήση ηχητικών σημάτων, προσφέροντας επιτάχυνση στην επεξεργασία των αποτελεσμάτων από τους ψυχολόγους και πολλά άλλα στοιχεία που προσθέτουν αξία στη δημιουργία τέτοιων προγραμμάτων. Στην εργασία αυτή δημιουργήθηκε ένα πρόγραμμα παρέμβασης για άτομα με ελαφριάς μορφής Αλτσχάιμερ επικεντρωμένο στην εξάσκηση της προσοχής.
description: In recent years, Alzheimer's disease is a concern to the medical community as it appears more and more often in elderly people. Researchers have proven that exercising the mind (cognitive training) before symptoms appear, when people are still healthy, as well as after experiencing symptoms, is very beneficial. When the human mind is exercised, it is less likely to develop the disease. Cognitive Training (CT) can delay or reverse the symptoms. CT in Greece is performed in special centers, through intervention exercises using the method “paper and pencil”. This project is a launch to the effort of transferring intervention programs from traditional media to the computer, enriched with multimedia and interactions that cannot be achieved with paper and pencil. Computer intervention programs can exploit all the possibilities of adjusting the difficulty levels of exercise, the speed, the images, using audible signals, accelerating the processing of results for psychologists ect. These perspectives add value to creation of such programs. This project is a development of a computer intervention program for people with mild Alzheimer's centralized in exercising of attention.
Precession of triaxially deformed neutron stars
Creators: name: Gao, Yong
name: Shao, Lijing
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: A deformed neutron star (NS) will precess if the instantaneous spin axis and the angular momentum are not aligned. Such a precession can produce continuous gravitational waves (GWs) and modulate electromagnetic pulse signals of pulsars. In this contribution we extend our previous work in a more convenient parameterization. We treat NSs as rigid triaxial bodies and give analytical solutions for angular velocities and Euler angles. We summarize the general GW waveforms from freely precessing triaxial NSs and use Taylor expansions to obtain waveforms with a small wobble angle. For pulsar signals, we adopt a simple cone model to study the timing residuals and pulse profile modulations. In reality, the electromagnetic torque acts on pulsars and affects the precession behavior. Thereof, as an additional extension to our previous work, we consider a vacuum torque and display an illustrative example for the residuals of body-frame angular velocities. Detailed investigations concerning continuous GWs and modulated pulsar signals from forced precession of triaixal NSs will be given in future studies.
description: 4 pages, 1 figure; accepted by Astronomische Nachrichten
Single Spin Transverse Asymmetries of Neutral Pions at Forward Rapidities in sqrt(s) = 62.4 GeV Polarized Proton Collisions in PHENIX
Creators: name: Chiu, Mickey
Publisher: name: arXiv
Year: 2007
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: In the RHIC run of 2006, PHENIX recorded data from about 20/nb of transversely polarized p+p collisions at sqrt(s) = 62.4 GeV and polarization of about 50%. Also in this last run PHENIX successfully commissioned a new lead-tungstate based electromagnetic calorimeter, the Muon Piston Calorimeter (MPC), covering 2 pi in azimuth and 3.1
description: 4 pages, 3 figures, to be published in the Proceedings of the 17th International Spin Physics Symposium, SPIN2006
Η συντηρητική ιδεολογία στη μεταπολιτευτική Ελλάδα και η σχέση της με την άκρα δεξιά
Creators: name: Μάμαλης, Αχιλλέας Κωνσταντίνου
Publisher: name: Aristotle University of Thessaloniki
Year: 2012
Subjects: Δεξιά
Νέα Δημοκρατία
Συντηρητισμός
Right
New Democracy
Conservatism

description: Η εν λόγω εργασία πραγματεύεται τις βασικές αρχές της συντηρητικής ιδεολογίας, έτσι όπως αυτή εκφράστηκε από το κυρίαρχο δεξιό κόμμα εξουσίας στην μεταπολιτευτική Ελλάδα, τη Νέα Δημοκρατία, και επιχειρεί να παρουσιάσει και στην ιστορικότητά της τη συνάρτηση συντηρητισμού και άκρας δεξιάς στο πλαίσιο των εναλλακτικά εφαρμοζόμενων τακτικών της διάκρισης και της ενσωμάτωσης. Παρεμπιπτόντως εξετάζεται η ιδεολογική ταυτότητα της Νέας Δημοκρατίας και επιχειρείται η κατάταξή της σε μια από τις δύο κατηγορίες της ευρωπαϊκής δεξιάς, στη χριστιανοδημοκρατία ή στον συντηρητισμό. Ως εκ τούτου τα εν λόγω ιδεολογικά ρεύματα προσεγγίζονται μέσω μιας ιστορικής επισκόπησης και διερευνάται το αν και κατά πόσο μπορούν να εντοπιστούν στην ιδιαίτερη ελληνική περίπτωση, στην πολιτική ζωή ενός τόπου που γνώρισε τον ευρωπαϊκό Διαφωτισμό κάτω από πολύ ιδιόμορφες συνθήκες. Το βασικό συμπέρασμα της εργασίας επαληθεύει την ύπαρξη κάποιας σχέσης ανάμεσα στην άμβλυνση των αιχμών του ελληνικού συντηρητισμού, και την ταύτισή του με το έτερο πόλο εξουσίας, με στην άνοδο της άκρας δεξιάς, ενώ στο τέλος επιχειρείται και μια προσέγγιση της συντηρητικής ιδεολογίας υπό το πρίσμα των σύγχρονων εξελίξεων και η ανίχνευση των προοπτικών της μέσα στην Ελλάδα της κρίσης.
description: This essay deals with the fundamental principles of the conservative ideology, as it has been expressed by the predominant right party in post-dictatorial Greece, the New Democracy, and focuses on the relation between conservatism and extreme right, from an historical aspect as well, in the framework of the alternative strategies of demarcation and assimilation. By the way, this essay is also based on a research of the ideological identity of the New Democracy and an attempt of categorization of this political party in one of the two significant categories of the European Right, christian- democracy and conservatism. Thus, these right ideological tendencies are studied in their historical evolution and this essay puts the issue, if and in which degree can we speak about these ideological tendencies in the political system of Greece, which is a country that familiarized itself with the european Enlightenment under extremely peculiar circumstances. The main conclusion of this essay confirms the existence of somewhat connection of the submerge of the ideological differences between the conservative ideology and the other ideologies to the emerge of extreme right, and at conclusion there are attempts, as well, to approach greek conservatism in the light of the modern global evolutions and to find its prospects in Greece of the financial crisis.
Kala Siddhanta
Creators: name: Londe, Karan
Publisher: name: figshare
Year: 2023
Subjects: classificationCode: 510104
subject: Galactic astronomy
classificationCode: 510103
subject: Cosmology and extragalactic astronomy
classificationCode: 510105
subject: General relativity and gravitational waves
classificationCode: 510107
subject: Planetary science (excl. solar system and planetary geology)
classificationCode: 510199
subject: Astronomical sciences not elsewhere classified
classificationCode: 510399
subject: Classical physics not elsewhere classified
classificationCode: 519999
subject: Other physical sciences not elsewhere classified
classificationCode: 499999
subject: Other mathematical sciences not elsewhere classified

description:   
For several hundred years and millennia, Time has always been considered as a part or a reference for any context or subject, however the understanding of the true nature of Time yet remains unaccomplished. This paper fulfils and provides a new approach to understanding Time in terms of standardizing all the Time references of different events to a single universal Time unit, enabling us for hypothetical reasoning and answers to the unasked questions like, what is Time? How is it? What's its true nature? What are its effects? Are the effects on us and other things the same? And were all the previous scientists correct about Time? This work also provides complete knowledge of how Time affects an object, and what is a Timeline? This work which will set basics for inter dimensional and Multiversal Time travel and communication, which consists of universal Time mechanics, which is applicable for each and every physically bounded structure, right from a single atom to any planetary structures and galaxies. This work will establish a different perception on Time, which will open a new gateway to understanding Time on its basic behaviour which will also inherit future technological advancements.
Quantum Tunneling of Magnetization in Single Molecular Magnets Coupled to Ferromagnetic Reservoirs
Creators: name: Misiorny, Maciej
name: Barnas, Józef
Publisher: name: arXiv
Year: 2006
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The role of spin polarized reservoirs in quantum tunneling of magnetization and relaxation processes in a single molecular magnet (SMM) is investigated theoretically. The SMM is exchange-coupled to the reservoirs and also subjected to a magnetic field varying in time, which enables the quantum tunneling of magnetization (QTM). The spin relaxation times are calculated from the Fermi golden rule. The exchange interaction with tunneling electrons is shown to affect the spin reversal due to QTM. Furthermore, it is shown that the switching is associated with transfer of a certain charge between the leads.
description: 5 pages, 3 EPS figures, final version as published
Το φαινόμενο της απόσχισης στο διεθνές δίκαιο: περιπτωσιολογικές μελέτες
Creators: name: Κατσαμάκης, Αντώνιος Σταύρου
Publisher: name: Aristotle University of Thessaloniki
Year: 2012
Subjects: Απόσχιση
Διεθνές Δίκαιο
Αρχή της αυτοδιάθεσης
Secession
International law
Self-determination

description: Σκοπός της μελέτης είναι η εξέταση του φαινομένου της απόσχισης τόσο μέσα από τη θεωρία και τους κανόνες του διεθνούς δικαίου όσο και μέσα από τη διεθνή πρακτική. Αναλυτικότερα, στο πρώτο μέρος της μελέτης, προσδιορίζονται ,αρχικά, τα βασικά χαρακτηριστικά του φαινομένου. Στη συνέχεια παρουσιάζονται αναλυτικά οι προβαλλόμενοι λόγοι θεμελίωσης της απόσχισης μέσα από την εξέταση της αρχής της αυτοδιάθεσης και της θεωρίας της «θεραπευτικής απόσχισης». Το πρώτο μέρος κλείνει με την ανάλυση θεμελιωδών κανόνων του διεθνούς δικαίου, όπως η αρχή της εδαφικής ακεραιότητας, η απαγόρευση χρήσης ή απειλής χρήσεως βίας και η αρχή της μη επέμβασης στα εσωτερικά των κρατών, κανόνες που συγκρούονται συχνά με την απόσχιση. Στο δεύτερο μέρος της μελέτης εξετάζονται τρείς χαρακτηριστικές περιπτώσεις απόσχισης ή απόπειρας απόσχισης: του Μπαγκλαντές, της επαρχίας του Κεμπέκ και του Κοσόβου. Μέσα από την εξέταση αυτή συνάγονται χρήσιμα συμπεράσματα αναφορικά με τον τρόπο που εφαρμόζονται οι κανόνες του διεθνούς δικαίου σε αποσχιστικά φαινόμενα αλλά και για τον τρόπο που η διεθνής κοινότητα αντιμετωπίζει τα τελευταία.
description: The purpose of this study is to examine the phenomenon of secession through the theory and the rules of international law but also through the international practice. Specifically, in the first part of the study identified initially the main features of the phenomenon. Following, the paper presents analytically the theoretical foundations of secession through the examination of the principle of self-determination and the theory of "remedial secession". The first part ends with the analysis of fundamental rules of international law, including the principle of territorial integrity, the prohibition of the use or threat of use of force and the principle of non-interference in the internal affairs of states, rules that often conflict with secession. The second part of the study examines three typical cases of secession or attempted secession: Bangladesh, the province of Quebec and Kosovo. Through this examination useful conclusions can be drawn regarding the way the rules of international law in separatist phenomena can be applied but also how the international community addresses to the latter.
Multi-temporal and multi-source remote sensing image classification by nonlinear relative normalization
Creators: name: Tuia, Devis
name: Marcos, Diego
name: Camps-Valls, Gustau
Publisher: name: arXiv
Year: 2020
Subjects: subject: Signal Processing (eess.SP)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Image and Video Processing (eess.IV)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: Remote sensing image classification exploiting multiple sensors is a very challenging problem: data from different modalities are affected by spectral distortions and mis-alignments of all kinds, and this hampers re-using models built for one image to be used successfully in other scenes. In order to adapt and transfer models across image acquisitions, one must be able to cope with datasets that are not co-registered, acquired under different illumination and atmospheric conditions, by different sensors, and with scarce ground references. Traditionally, methods based on histogram matching have been used. However, they fail when densities have very different shapes or when there is no corresponding band to be matched between the images. An alternative builds upon \emph{manifold alignment}. Manifold alignment performs a multidimensional relative normalization of the data prior to product generation that can cope with data of different dimensionality (e.g. different number of bands) and possibly unpaired examples. Aligning data distributions is an appealing strategy, since it allows to provide data spaces that are more similar to each other, regardless of the subsequent use of the transformed data. In this paper, we study a methodology that aligns data from different domains in a nonlinear way through {\em kernelization}. We introduce the Kernel Manifold Alignment (KEMA) method, which provides a flexible and discriminative projection map, exploits only a few labeled samples (or semantic ties) in each domain, and reduces to solving a generalized eigenvalue problem. We successfully test KEMA in multi-temporal and multi-source very high resolution classification tasks, as well as on the task of making a model invariant to shadowing for hyperspectral imaging.
Bose-Einstein Condensates as a Probe for Lorentz Violation
Creators: name: Colladay, Don
name: McDonald, Patrick
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The effects of small Lorentz-violating terms on Bose-Einstein condensates are analyzed. We find that there are changes to the phase and shape of the ground-state wave function that vary with the orientation of the trap. In addition, spin-couplings can act as a source for spontaneous symmetry breaking in ferromagnetic condensates making them sensitive probes for fundamental symmetry violation.
Rheology and phase transitions of an upper critical solution temperature (UCST) polymer blend
Creators: name: Koumoutsakos, Anastasios D.
Publisher: name: University of British Columbia
Year: 2009

description: The viscoelastic properties of a model binary polymer blend exhibiting an Upper Critical Solution Temperature (UCST) phase diagram were investigated by utilizing small amplitude oscillatory and steady shear measurements. A mixture of unentangled monodisperse poly(styrene) and poly (phenyl methyl siloxane) was used, and its phase diagram was established by turbidity and light scattering measurements. In the miscible region the concentration dependence of the viscosity was adequately described by a mixing rule accounting for the molecular surfaces. Near the phase separation temperature and far from the glass transition, critical concentration fluctuations dominated the linear viscoelastic response and were responsible for the observed thermorheological complexity. An appropriate quantitative account of these fluctuations resulted in the accurate rheological determination of both the binodal and spinodal temperatures, extending thus the applicability of relevant procedure originally developed for blends exhibiting lower critical solution temperature (LCST) behavior. In the phase separated regime, the elasticity of the dispersed phase undergoing spinodal decomposition was due to the interfacial tension, and the resulting normal stresses followed the scaling recently predicted by Onuki for molecular mixtures with large viscosity difference.
The Daily Life of Software Engineers during the COVID-19 Pandemic
Creators: name: Russo, Daniel
name: Hanel, Paul P. H.
name: Altnickel, Seraphina
name: van Berkel, Niels
Publisher: name: arXiv
Year: 2021
Subjects: subject: Software Engineering (cs.SE)
subject: FOS: Computer and information sciences

description: Following the onset of the COVID-19 pandemic and subsequent lockdowns, software engineers' daily life was disrupted and abruptly forced into remote working from home. This change deeply impacted typical working routines, affecting both well-being and productivity. Moreover, this pandemic will have long-lasting effects in the software industry, with several tech companies allowing their employees to work from home indefinitely if they wish to do so. Therefore, it is crucial to analyze and understand how a typical working day looks like when working from home and how individual activities affect software developers' well-being and productivity. We performed a two-wave longitudinal study involving almost 200 globally carefully selected software professionals, inferring daily activities with perceived well-being, productivity, and other relevant psychological and social variables. Results suggest that the time software engineers spent doing specific activities from home was similar when working in the office. However, we also found some significant mean differences. The amount of time developers spent on each activity was unrelated to their well-being, perceived productivity, and other variables. We conclude that working remotely is not per se a challenge for organizations or developers.