cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Self-organized transient facilitated atomic transport in Pt/Al(111)
Creators: name: Süle, P.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: During the course of atomic transport in a host material, impurity atoms need to surmount an energy barrier driven by thermodynamic bias or at ultra-low temperatures by quantum tunneling. In the present article we demonstrate using atomistic simulations that at ultra-low temperature transient inter-layer atomic transport is also possible without tunneling when the Pt/Al(111) impurity/host system self-organizes itself spontaneously into an intermixed configuration. No such extremely fast athermal concerted process has been reported before at ultra low temperatures. The outlined novel transient atomic exchange mechanism could be of general validity. We find that the source of ultra-low temperature heavy particle barrier crossing is intrinsic and no external bias is necessary for atomic intermixing and surface alloying in Pt/Al although the dynamic barrier height is few eV. The mechanism is driven by the local thermalization of the Al(111) surface in a self-organized manner arranged spontaneously by the system without any external stimulus. The core of the short lived thermalized region reaches the local temperature of $\sim 1000$ K (including few tens of Al atoms) while the average temperature of the simulation cell is $\sim 3$ K. The transient facilitated intermixing process also takes place with repulsive impurity-host interaction potential leading to negative atomic mobility hence the atomic injection is largely independent of the strength of the impurity-surface interaction. We predict that similar exotic behaviour is possible in other materials as well.
description: 12 pages, 8 figures, full paper at: http://www.mfa.kfki.hu/~sule/papers/ptonal.pdf . J. Chem. Phys. (2008), in press
Additional file 8 of Significant variation in the performance of DNA methylation predictors across data preprocessing and normalization strategies
Creators: name: Ori, Anil P. S.
name: Lu, Ake T.
name: Horvath, Steve
name: Ophoff, Roel A.
Publisher: name: figshare
Year: 2022
Subjects: subject: Biochemistry
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Biotechnology
subject: 69999 Biological Sciences not elsewhere classified
subject: 80699 Information Systems not elsewhere classified
subject: FOS: Computer and information sciences
subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics

description: Additional file 8. Table that describes cohort characteristics.
Quantitative and Three-Dimensional Assessment of Holdup Material
Creators: name: Rebei, N.
name: Fang, M.
name: Di Fulvio, A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: Nuclear material deposited in equipment, transfer lines, and ventilation systems of a processing facility is usually referred to as holdup. In this work, we propose to use an array of detectors co-axial to the inspected pipe to measure the holdup material. This method is implementable into an automated system capable of crawling on surfaces and pipes of various curvatures, which would enable faster, easier, and more accurate holdup safeguards measurements. We first demonstrated that the current holdup assay procedure could lead to a non-negligible bias in the estimate of special nuclear material mass, due to the simplified assumption of deposited geometry introduced by the Generalized Geometry Holdup (GGH) model. The new approach consists of imaging the inner holdup material by characterizing the detector array's response and unfolding it from the measured light output. Our experimental proof of principle consists of three NaI(Tl) detectors surrounding an aluminum pipe containing two cesium-137( 137Cs) sources. We derived the source distribution inside the pipe by first calculating the detector response matrix using a method adaptive to the surface geometry of the object containing the measured holdup material. Creating a matrix of the detector array's measured counts, we then proceed to solve an inverse problem, resulting in an accurately located source position and activity distribution within the response matrix's spatial resolution. We then developed a simulated model of the envisioned experimental setup, which accurately described both the activity and position of the source in 2D. Finally, we extended our model onto a discretized three-dimensional model of the system, encompassing 36 detectors. For the 3D simulation of four different source geometries, the model accurately localized the source position in 3D, while the activity retained a maximum relative error of +-5.32%.
description: 21 pages, 10 figures, 2 tables
Observation of magnetism in Au thin films
Creators: name: Reich, S.
name: Leitus, G.
name: Feldman, Y.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Direct magnetization measurements of thin gold films are presented. These measurements integrate the signal from the thin film under study and the magnetic contribution of the film's interface with the substrate. The diamagnetic contribution to the signal from the bulk substrate is of the same order as the noise level. we find that thin gold films can exhibit positive magnetization. The character of their magnetic behavior is strongly substrate dependent.
description: 9 pages, 4 figures
title: The PLAN FISH project
Creators: name: Werner, Malin
Publisher: name: ASC 2013 - Theme session E
Year: 2024
Subjects: Fisheries and aquaculture
Ecosystem observation, processes and dynamics

description: No abstracts are to be cited without prior reference to the author. The aim of the project is to contribute to a scientific foundation for an ecosystem based management of fishery resources by linking food web dynamics to fisheries in the Baltic Sea. The project is in the process of wrapping up the results and the poster will show a summary of the work within the project from 2008-2013
Facial Biometric System for Recognition using Extended LGHP Algorithm on Raspberry Pi
Creators: name: Chakraborty, Soumendu
name: Singh, Satish Kumar
name: Kumar, Kush
Publisher: name: arXiv
Year: 2021
Subjects: subject: Multimedia (cs.MM)
subject: FOS: Computer and information sciences

description: In todays world, where the need for security is paramount and biometric access control systems are gaining mass acceptance due to their increased reliability, research in this area is quite relevant. Also with the advent of IOT devices and increased community support for cheap and small computers like Raspberry Pi its convenient than ever to design a complete standalone system for any purpose. This paper proposes a Facial Biometric System built on the client-server paradigm using Raspberry Pi 3 model B running a novel local descriptor based parallel algorithm. This paper also proposes an extended version of Local Gradient Hexa Pattern with improved accuracy. The proposed extended version of LGHP improved performance as shown in performance analysis. Extended LGHP shows improvement over other state-of-the-art descriptors namely LDP, LTrP, MLBP and LVP on the most challenging benchmark facial image databases, i.e. Cropped Extended Yale-B, CMU-PIE, color-FERET, LFW, and Ghallager database. Proposed system is also compared with various patents having similar system design and intent to emphasize the difference and novelty of the system proposed.
Additional file 9 of Significant variation in the performance of DNA methylation predictors across data preprocessing and normalization strategies
Creators: name: Ori, Anil P. S.
name: Lu, Ake T.
name: Horvath, Steve
name: Ophoff, Roel A.
Publisher: name: figshare
Year: 2022
Subjects: subject: Biochemistry
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Biotechnology
subject: 69999 Biological Sciences not elsewhere classified
subject: 80699 Information Systems not elsewhere classified
subject: FOS: Computer and information sciences
subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics

description: Additional file 9. Supplementary methods.
A stellar companion in the HD 189733 system with a known transiting extrasolar planet
Creators: name: Bakos, Gaspar A.
name: Pal, Andras
name: Latham, David W.
name: Noyes, Robert W.
name: Stefanik, Robert P.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We show that the very close-by (19 pc) K0 star HD 189733, already found to be orbited by a transiting giant planet, is the primary of a double-star system, with the secondary being a mid-M dwarf with projected separation of about 216 AU from the primary. This conclusion is based on astrometry, proper motion and radial velocity measurements, spectral type determination and photometry. We also detect differential proper motion of the secondary. The data appear consistent with the secondary orbiting the primary in a clockwise orbit, lying nearly in the plane of the sky (that is, nearly perpendicular to the orbital plane of the transiting planet), and with period about 3200 years.
description: 4 pages, submitted to APJ Letters
Η φοίτηση των μαθητών με ανεπάρκεια όρασης στο γενικό σχολείο ως παράγοντας ενίσχυσης της κοινωνικής τους ένταξης.
Creators: name: Οκτσελόγλου, Κυριακή Στέφανου
Publisher: name: Aristotle University of Thessaloniki
Year: 2011
Subjects: Ενταξη
Κοινωνική αλληλεπίδραση
Ατομα με οπτική ανεπάρκεια
Integration
Social interaction
Individuals with visual impairement

description: Σκοπός της διατριβής ήταν η διερεύνηση των απόψεων των νέων με οπτική ανεπάρκεια σχετικά με την επίδραση που είχε η φοίτησή τους στο γενικό σχολείο στη μετέπειτα κοινωνική και επαγγελματική τους ένταξη. Ιδιαίτερη έμφαση δώσαμε στη συναισθηματικές αντιδράσεις και στα χαρακτηριστικά της προσωπικότητας των παιδιών με οπτική ανεπάρκεια, τα οποία είναι πιθανό να επηρεάσουν αρνητικά τη σχολική και κοινωνική τους ένταξη. Επίσης, παρουσιάσαμε ευρήματα από τη διεθνή βιβλιογραφία σχετικά με τις αδυναμίες των παιδιών αυτών να αποκτήσουν επαρκείς κοινωνικές δεξιότητες και την επίδρασή τους στη δημιουργία κοινωνικών σχέσεων με τους βλέποντες συνομηλίκους τους. Ακόμα, αναφερθήκαμε στο σημαντικό ρόλο που διαδραματίζουν οι εκπαιδευτικοί της γενικής τάξης και οι γονείς των παιδιών αυτών στην ενίσχυση της ένταξής τους στην κοινωνική και επαγγελματική ζωή. Συμπεράναμε ότι παρόλο που τα παιδιά αυτά εντάσσονται κανονικά στο γενικό σχολείο εξακολουθούν να είναι κοινωνικά απομονωμένα και να μην δέχονται επαρκή μαθησιακή στήριξη και ενημέρωση σχετικά με τον επαγγελματικό προσανατολισμό μέσα στο χώρο του σχολείου.
description: The aim of the present thesis was to investigate the views of young people with visual impairment on the effect of the attendance at mainstream school in the subsequent social and professional integration. Particular emphasis we gave to the emotional reactions and personality characteristics of children with visual impairment are likely to negatively affect the educational and social inclusion. Also, we presented findings from the literature on the weaknesses of these children have adequate social skills and their impact on the formation of social relationships with their sighted peers. Still, we discussed the important role played by general classroom teachers and the parents of these children to strengthen their integration into social and professional life. We concluded that although these children are integrated in regular mainstream school continue to be socially isolated and do not receive adequate learning support and information on career guidance in schools.
title: Structure and functioning of the Baltic Sea food webs
Creators: name: Kiljunen, M.
name: Peltonen, H.
name: Lehtiniemi, M.
name: Uusitalo, L.
name: Sinisalo, T.
name: Norkko, J.
name: Kunnasranta, M.
name: Torniainen, J.
name: Rissanen, A.
name: Karjalainen, J.
Publisher: name: ASC 2013 - Theme session E
Year: 2024
Subjects: Fisheries and aquaculture
Ecosystem observation, processes and dynamics

description: No abstracts are to be cited without prior reference to the author. Structure and functioning of the Baltic Sea food webs
Beauty 2006 -- Conference Summary and Future Prospects
Creators: name: Gershon, Tim
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The status of $B$ physics, CP violation and related measurements at the time of the Beauty 2006 conference are summarized. Particular attention is given to the exciting prospects that lie ahead, at the commencement of the LHC era, and beyond.
description: Proceedings of The 11th Conference on B Physics at Hadron Machines (Beauty 2006), September 25-29, 2006, Keble College, Oxford. To appear in Nucl. Phys. (Proc. Suppl.)
title: Importance of the fish predation on the composition and structure of copepods communities in the Franz Josef Land area (the northeastern Barents Sea)
Creators: name: Orlova, Emma L.
name: Dolgov, Andrey V.
name: Nesterova, Valentina N.
name: Prokopchuk, Irina P.
name: Benzik, Aleksandr N.
Publisher: name: ASC 2013 - Theme session F
Year: 2024
Subjects: Ecosystem observation, processes and dynamics

description: No abstracts are to be cited without prior reference to the author. The Franz Josef Land area is a region of a great scientific interest in the northern Barents Sea where rapid and significant changes in the mesoplankton community (especially in copepods) have been recently observed. Both Arctic (Calanus glacialis, C. hyperboreus, Pseudocalanus minutus and other species) and boreal (C. finnmarchicus) species occur in the area and some of them are important prey species for abundant pelagic fishes (capelin and polar cod). The feeding preferences of pelagic fish for different copepods are determined by their species, size and developmental stages. Capelin prefers to feed on large mature females of C. glacialis, whereas small individuals of P. minutus are virtually absent in the fish diet. Changes in the species composition, the predominance of various species, the total abundance and biomass of copepods as well as impacts of the fish predation on the copepods community in the Franz Josef Land area in 2008-2011 are discussed in this paper.
Ensembling geophysical models with Bayesian Neural Networks
Creators: name: Sengupta, Ushnish
name: Amos, Matt
name: Hosking, J. Scott
name: Rasmussen, Carl Edward
name: Juniper, Matthew
name: Young, Paul J.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Geophysics (physics.geo-ph)
subject: Machine Learning (cs.LG)
subject: Applications (stat.AP)
subject: Machine Learning (stat.ML)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Ensembles of geophysical models improve projection accuracy and express uncertainties. We develop a novel data-driven ensembling strategy for combining geophysical models using Bayesian Neural Networks, which infers spatiotemporally varying model weights and bias while accounting for heteroscedastic uncertainties in the observations. This produces more accurate and uncertainty-aware projections without sacrificing interpretability. Applied to the prediction of total column ozone from an ensemble of 15 chemistry-climate models, we find that the Bayesian neural network ensemble (BayNNE) outperforms existing ensembling methods, achieving a 49.4% reduction in RMSE for temporal extrapolation, and a 67.4% reduction in RMSE for polar data voids, compared to a weighted mean. Uncertainty is also well-characterized, with 90.6% of the data points in our extrapolation validation dataset lying within 2 standard deviations and 98.5% within 3 standard deviations.
Patterns of dyslexia in Greek adolescents:
Creators: name: Φωτεινού. Γαρυφαλλιά Χρήστου
Publisher: name: Aristotle University of Thessaloniki
Year: 2011
Subjects: Δυσλεξία
Γραπτός λόγος
Ανάγνωση
Dysxlexia
Writing
Reading aloud

description: Στην εργασία αυτή εξετάζονται δύο έλληνες δυσλεξικοί έφηβοι και συγκρίνονται τα αποτελέσματά τους με τα αντίστοιχα δύο μη δυσλεξικών συνομήλικων εφήβων. Στους μαθητές αυτούς δόθηκαν διάφορα τεστ για να διαπιστωθεί το είδος της δυσλεξίας που έχουν και να απαντηθούν τα ερωτήματα που τίθενται στην εργασία και αφορούν τα ενεργητικά ρήματα, την χρήση της υποτακτικής σύνδεσης στον γραπτό λόγο και των λειτουργικών λέξεων στην ανάγνωση. Ο γραπτός λόγος εξετάζεται τόσο στην μητρική γλώσσα των μαθητών – την Ελληνική καθώς και στην ξένη – την Αγγλική. Πριν την παρουσίαση των δοκιμασιών και των αποτελεσμάτων τους δίνεται το θεωρητικό υπόβαθρο της δυσλεξίας.
description: In this paper, I test two Greek teenage dyslexics and I compare their results with two age-matched controls. I administer several tests to them so as to see the type of dyslexia they have and also to answer the questions posed in the paper concerning action verbs, subordination in writing and function words in reading aloud. The writing is tested both in their mother tongue – Greek and in the foreign language – English. Before the presentation of the tasks and their results a theoretical background concerning dyslexia is given.
Strong coupling constants of doubly heavy baryons with vector mesons in QCD
Creators: name: Aliev, T. M.
name: Şimşek, K.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Using the most general form of the interpolating current for baryons, the strong electric and magnetic coupling constants of light vector mesons $ ρ$ and $ K^* $ with doubly heavy baryons are computed within the light-cone sum rules. We consider 2- and 3-particle distribution amplitudes of the aforementioned vector mesons. The obtained results can be useful in the analysis of experimental data on the properties of doubly heavy baryons conducted at LHC.
description: 27 pages, 6 fgures
Deciphering Inflation with Gravitational Waves: Cosmic Microwave Background Polarization vs. Direct Detection with Laser Interferometers
Creators: name: Smith, Tristan L.
name: Peiris, Hiranya V.
name: Cooray, Asantha
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: A detection of the primordial gravitational wave background is considered to be the ``smoking-gun '' evidence for inflation. While super-horizon waves are probed with cosmic microwave background (CMB) polarization, the relic background will be studied with laser interferometers. The long lever arm spanned by the two techniques improves constraints on the inflationary potential and validation of consistency relations expected under inflation. If gravitational waves with a tensor-to-scalar amplitude ratio greater than 0.01 are detected by the CMB, then a direct detection experiment with a sensitivity consistent with current concept studies should be pursued vigorously. If no primordial tensors are detected by the CMB, a direct detection experiment to understand the simplest form of inflation must have a sensitivity improved by two to three orders of magnitude over current plans.
description: 6 pages, 2 color figures. replaced with published version. Full resolution figures are available at http://cfcp.uchicago.edu/~hiranya/CMB_BBO/
Comparison of the Ultra-High Energy Cosmic Ray Flux Observed by AGASA, HiRes and Auger
Creators: name: Connolly, B. M.
name: BenZvi, S. Y.
name: Finley, C. B.
name: O'Neill, A. C.
name: Westerhoff, S.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The current measurements of the cosmic ray energy spectrum at ultra-high energies ($\text{E}>10^{19}$ eV) are characterized by large systematic errors and poor statistics. In addition, the experimental results of the two experiments with the largest published data sets, AGASA and HiRes, appear to be inconsistent with each other, with AGASA seeing an unabated continuation of the energy spectrum even at energies beyond the GZK cutoff energy at $10^{19.6}$ eV. Given the importance of the related astrophysical questions regarding the unknown origin of these highly energetic particles, it is crucial that the extent to which these measurements disagree be well understood. Here we evaluate the consistency of the two measurements for the first time with a model-independent method that accounts for the large statistical and systematic errors of current measurements. We further compare the AGASA and HiRes spectra with the recently presented Auger spectrum. The method directly compares two measurements, bypassing the introduction of theoretical models for the shape of the energy spectrum. The inconsistency between the observations is expressed in terms of a Bayes Factor, a standard statistic defined as the ratio of a separate parent source hypothesis to a single parent source hypothesis. Application to the data shows that the two-parent hypothesis is disfavored. We expand the method to allow comparisons between an experimental flux and that predicted by any model.
description: accepted by Phys. Rev. D
Conformation-dependent sequence design of polymer chains in melts
Creators: name: Govorun, Elena N.
name: Shupanov, Ruslan M.
name: Pavlenko, Sophia A.
name: Khokhlov, Alexei R.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Conformation-dependent design of polymer sequences can be considered as a tool to control macromolecular self-assembly. We consider the monomer unit sequences created via the modification of polymers in a homogeneous melt in accordance with the spatial positions of the monomer units. The geometrical patterns of lamellae, hexagonally packed cylinders, and balls arranged in a body-centered cubic lattice are considered as typical microphase-separated morphologies of block copolymers. Random trajectories of polymer chains are described by the diffusion-type equations and, in parallel, simulated in the computer modeling. The probability distributions of block length $k$, which are analogous to the first-passage probabilities, are calculated analytically and determined from the computer simulations. In any domain, the probability distribution can be described by the asymptote $~k^{-3/2}$ at moderate values of $k$ if the spatial size of the block is less than the smallest characteristic size of the domain. For large blocks, the exponential asymptote $exp(-const \, k a^2/d_{as}^2)$ is valid, $d_{as}$ being the asymptotic domain length (a is the monomer unit size). The number average block lengths and their dispersities change linearly with the block length for lamellae, cylinders, and balls, when the domain is characterized by a single characteristic size. If the domain is described by more than one size, the number average block length can grow nonlinearly with the domain sizes and the length das can depend on all of them.
description: Submitted to Journal of Physics A: Mathematical and Theoretical, 30 pages, 13 figures
Vector meson electromagnetic form factors
Creators: name: Lasscock, B. G.
name: Hedditch, J.
name: Leinweber, D. B.
name: Williams, A. G.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: The charge, magnetic and quadrupole form factors of vector mesons and the charge form factor of pseudo-scalar mesons are calculated in quenched lattice QCD. The charge radii and magnetic moments are derived. The quark sector contributions to the form factors are calculated separately and we highlight the environmental sensitivity of the light-quark contribution to charge radii.
description: 7 pages, 5 figures, Talk given at the 24th International Symposium on Lattice Field Theory (Lattice 2006), Tucson, Arizona, 23-28 Jul 2006
Towards a reconstructive methodology for building a provenance metamodel that fits the complex bioinformatics pipelines
Creators: name: Perseil, Isabelle
name: Holub, Petr
Publisher: name: Zenodo
Year: 2019
Subjects: Provenance
Metamodel
methodology

description: Defining a methodology for building a provenance metamodel easily instantiable for the most complex bioinformatics pipelines, and use this methodology for simpler models.
title: Beneficial influence of microalgae and protists on early stages of herring (Clupea harengus) larvae.
Creators: name: Illing, Björn
name: Moyano, Marta
name: Peck, Myron A.
Publisher: name: ASC 2013 - Theme session F
Year: 2024
Subjects: Ecosystem observation, processes and dynamics

description: No abstracts are to be cited without prior reference to the author. Based on the microbial loop concept, the trophic link between protozooplankton and ichthyoplankton has recently gained increased attention. We conducted two laboratory experiments to examine the effects of microalgae (Rhodomonas baltica, RB) and protists (Oxyrrhis marina, OX) on 0-16 days posthatch (dph) larvae of spring-spawned Baltic herring (Clupea harengus)
Ανάπτυξη Δικτυακού Ισοτόπου θερμοκοιτίδας Ιδεών για Projects Λογισμικού Κινητών Συσκευών με Λειτουργικό Σύστημα Android:
Creators: name: Γρίβας, Ιωάννης Αντρέα
Publisher: name: Aristotle University of Thessaloniki
Year: 2011
Subjects: Ιστοσελίδα
Θερμοκοιτίδα ιδεών
Εφαρμογές κινητών συσκευών
website
Android
Applications for mobile devices

description: Στόχος της παρούσης πτυχιακής εργασίας είναι η ανάπτυξη ενός δυναμικού ισοτόπου θερμοκοιτίδας ιδεών για εφαρμογές κινητών συσκευών που χρησιμοποιούν το λειτουργικό σύστημα Android. Η διαδικτυακή αυτή εφαρμογή θα χρησιμοποιηθεί από φοιτητές του πανεπιστημίου για ακαδημαϊκούς σκοπούς αφού θα φιλοξενείται σε server του πανεπιστημίου. Η γενική φιλοσοφία του συστήματος είναι ότι μία ιδέα για κάποια εφαρμογή πρέπει να περάσει τρία στάδια μέχρι να υλοποιηθεί .Πρώτο στάδιο είναι η αρχική σύλληψη και η δημοσίευση στην κοινότητα ,δεύτερο είναι το στάδιο της θερμοκοιτίδας μέσα από το οποίο η ιδέα αξιολογείται και πάνω σ’αυτήν προτείνονται λύσεις και ιδέες για την υλοποίηση της. Σκοπός του δευτέρου σταδίου είναι να φιλτραριστούν οι ελπιδοφόρες ιδέες και να ενεργοποιηθεί η κοινότητα προς την κατεύθυνση της υλοποίησης. Αποτέλεσμα της θερμοκοιτίδας είναι η εύρεση της καλύτερη λύσης και η οργάνωση γκρουπ προγραμματιστών με στόχο την υλοποίηση της εφαρμογής, αυτό αποτελεί το στάδιο τρία. Στο τέλος του σταδίου αυτού μέσα από το γκρουπ θα προκύψει η εφαρμογή η οποία είναι έτοιμη για δημοσίευση .Τέλος ,μέσα από το σύστημα της θερμοκοιτίδας και της χρήσης διαδικτυακής κοινότητας οι χρήστες – προγραμματιστές μαθαίνουν να συνεργάζονται και να οργανώνονται σε ομάδες για την επίτευξη ενός σκοπού που στην συγκεκριμένη περίπτωση είναι η υλοποίηση κάποιας εφαρμογής.
description: The aim of this thesis is to develop a dynamic online incubator system of ideas for mobile applications using the operating system Android. This web application will be used by students of the university for academic purposes as will be hosted on the university server. The general philosophy of the system is that an idea for an application must go through three stages to be implemented. First step is the initial design and publishing in community, Then the second stage of the incubator through which the idea is assessed in and there will be proposed solutions and ideas to implement. The purpose of the second stage is to filter out promising ideas and enabled the community towards implementation. Result of the incubator is to find the best solution and organizing groups of developers to implement the application, this is stage three. At the end of this stage would be an application that is ready for publication. Finally, through the system of the incubator and the use of online community users - developers learn to cooperate and be organized into groups to achieve a purpose which in this case is to implement a new application.
Initial dilution of a horizontal jet in a strong current
Creators: name: Marks, Bonnie Jean
Publisher: name: University of British Columbia
Year: 2009

description: The initial dilution of waste discharging into a water body can be accomplished by turbulent jets. Enhanced mixing is thought to occur when the water body is a river, due to the presence of an ambient current and increased turbulence levels. One case of jet mixing in a river is when the jet is weak compared with the ambient current, such as a pulp mill discharge into the Fraser River. This research was initially driven by the need to model the interaction between suspended sediments and pulp mill effluent in the Fraser River Basin under the Fraser River Action Plan. Because of the detrimental effect on water quality, researchers are investigating the physical, chemical and biological processes which occur when an effluent plume is discharged into the river. This study examines the physical mechanisms which are responsible for mixing in the vicinity of the discharge. To investigate the mixing process in the initial near-field, experiments involving a single buoyant jet discharging at an angle of 45 degrees into a moving ambient environment were performed. The main emphasis of this study is on using temperature measurements to calculate dilution in the vicinity of the port. To simulate field conditions in the laboratory, the range of two modelling parameters were preserved, namely the densimetric jet Froude number and the velocity ratio, which is the ratio of jet velocity to ambient velocity. The experimental data showed that the velocity ratio has a greater influence on dilution than the jet Froude number. Generally, dilution increases with decreasing velocity ratio or increasing ambient current. The data correspond well with previous studies on dilution of jet in a perpendicular crossflow. Bottom attachment of the jet is evident, creating a possible mechanism for entrainment of bottom sediments into the effluent plume in relation to the Fraser River.
Vacancy defects induced changes in the electronic and optical properties of NiO studied by spectroscopic ellipsometry and first-principles calculations
Creators: name: Egbo, Kingsley O.
name: Liu, Chao Ping
name: Ekuma, Chinedu E.
name: Yu, Kin Man
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Native defects in semiconductors play an important role in their optoelectronic properties. Nickel oxide (NiO) is one of the few wide-gap p-type oxide semiconductors and its conductivity is believed to be controlled primarily by Ni-vacancy acceptors. Herein, we present a systematic study comparing the optoelectronic properties of stoichiometric NiO, oxygen-rich NiO with Ni vacancies (NiO:VNi), and Ni-rich NiO with O vacancies (NiO:VO). The optical properties were obtained by spectroscopic ellipsometry, while valence band spectra were probed by high-resolution x-ray photoelectron spectroscopy. The experimental results are directly compared to first-principles density functional theory + U calculations. Computational results confirm that gap states are present in both NiO systems with vacancies. Gap states in NiO:Vo are predominantly Ni 3d states, while those in NiO:VNi are composed of both Ni 3d and O 2p states. The absorption spectra of the NiO:VNi sample show significant defect-induced features below 3.0 eV compared to NiO and NiO:VO samples. The increase in sub-gap absorptions in NiO:VNi can be attributed to gap states observed in the electronic density of states. The relation between native vacancy defects and electronic and optical properties of NiO are demonstrated, showing that at similar vacancy concentration, the optical constants of NiO:VNi deviate significantly from those of NiO:VO. Our experimental and computational results reveal that although VNi are effective acceptors in NiO, they also degrade the visible transparency of the material. Hence, for transparent optoelectronic device applications, an optimization of native VNi defects with extrinsic doping is required to simultaneously enhance p-type conductivity and transparency.
description: 25 Pages, 5 Figures
Magnetic-field-induced spin excitations and renormalized spin gap of the underdoped superconductor La$_{1.895}$Sr$_{0.105}$CuO$_{4}$
Creators: name: Chang, J.
name: Schnyder, A. P.
name: Gilardi, R.
name: Ronnow, H. M.
name: Pailhes, S.
name: Christensen, N. B.
name: Niedermayer, Ch.
name: McMorrow, D. F.
name: Hiess, A.
name: Stunault, A.
name: Enderle, M.
name: Lake, B.
name: Sobolev, O.
name: Momono, N.
name: Oda, M.
name: Ido, M.
name: Mudry, C.
name: Mesot, J.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: High-resolution neutron inelastic scattering experiments in applied magnetic fields have been performed on La$_{1.895}$Sr$_{0.105}$CuO$_{4}$ (LSCO). In zero field, the temperature dependence of the low-energy peak intensity at the incommensurate momentum-transfer $\mathbf{Q}^{\ }_{\mathrm{IC}}=(0.5,0.5\pmδ,0),(0.5\pmδ,0.5,0)$ exhibits an anomaly at the superconducting $T^{\}_{c}$ which broadens and shifts to lower temperature upon the application of a magnetic field along the c-axis. A field-induced enhancement of the spectral weight is observed, but only at finite energy transfers and in an intermediate temperature range. These observations establish the opening of a strongly downward renormalized spin gap in the underdoped regime of LSCO. This behavior contrasts with the observed doping dependence of most electronic energy features.
description: accepted for publication in Phys. Rev. Lett
title: Temporal trends in pelagic communities and forage fish removals: Connections between zooplankton, Atlantic herring (Clupea harengus), and herring consumption across the northeast U.S. continental shelf
Creators: name: Smith, Brian E.
name: Rowe, Stacy
Publisher: name: ASC 2013 - Theme session F
Year: 2024
Subjects: Ecosystem observation, processes and dynamics

description: No abstracts are to be cited without prior reference to the author. Forage fishes are critical components of continental shelf foodwebs. Atlantic herring (Clupea harengus) is one northwest Atlantic forage species that is both commercially targeted and links lower and upper trophic levels, including fish predators of commercial value. Here we examined temporal trends in zooplankton, herring abundance, and herring removals through consumption by fishes and commercial landings for the northeast U.S. continental shelf from 1977-2011. Zooplankton abundance on the shelf cycles over time with 10-year periods, increasing in the 1980s, and more notably, increasing in the late 1990s to early 2000s. Copepods, euphausiids, gammarids, and other small zooplankton dominate the diet of herring. Interestingly, the cross-correlations between zooplankton, herring abundance, consumption, and landings were significant near time lag zero, implying tight coupling and concurrent surges among these pelagic communities. With multivariate autoregressive state-space models, common trends within the herring consumption time series were identified and model fit improved when related to trends in zooplankton abundance. Managing fisheries resources, particularly forage fishes, remains an intriguing challenge given their pivotal roles as major prey for commercial fishes and fisheries; thus, continuing to incorporate oceanographic and foodweb processes into fish stock assessments is essential given their potential disruption due to global change.
Αξιολόγηση και βελτιστοποίηση ενός περιοχικού κλιματικού μοντέλου:
Creators: name: Μυστακίδης, Στέφανος Χρήστου
Publisher: name: Aristotle University of Thessaloniki
Year: 2011
Subjects: Κλιματικά μοντέλα περιοχής
Προσομοιώσεις υψηλής ανάλυσης
Κατακόρυφη αστάθεια
Regional climate modeling
High resolution simulations
Convection

description: Πραγματοποιήθηκαν έξι προσομοιώσεις υψηλής ανάλυσης (10km x 10km) για την Ελλάδα με το RegCM3 για την περίοδο Δεκέμβριος 1999 – Δεκέμβριος 2000 χρησιμοποιώντας κάθε φορά διαφορετικά σχήματα παραμετροποίησης της κατακόρυφης αστάθειας. Συγκεκριμένα οι προσομοιώσεις περιλάμβαναν δυο πειράματα όπου χρησιμοποιήθηκε το σχήμα του Grell για την κατακόρυφη αστάθεια με την υπόθεση των Fritsch-Chappell (FC) και τέσσερα στα οποία χρησιμοποιήθηκε το σχήμα του Emanuel. Ο στόχος της μελέτης είναι η βελτιστοποίηση και αξιολόγηση του μοντέλου για την Ελλάδα συγκρίνοντας προσομοιωμένες τιμές θερμοκρασίας αέρα, βροχόπτωσης και νέφωσης με παρατηρήσεις 84 σταθμών της ΕΜΥ. Πραγματοποιήθηκαν εμφωλευμένες προσομοιώσεις με βάση δεδομένα του RegCM3 για την Ευρώπη (ανάλυση 25km x25km) τα οποία χρησιμοποίησαν ως πλευρικές οριακές συνθήκες τα δεδομένα ανάλυσης (reanalysis) ERA-40. Στις προσομοιώσεις όπου χρησιμοποιείται το τροποποιημένο σχήμα του Emanuel το μέσο σφάλμα (και RMSE) μειώνεται, σε σχέση με το αντίστοιχο του προεπιλεγμένου σχήματος του Grell, για τη θερμοκρασία πάνω από 25% (20%), για τη νεφοκάλυψη πάνω από 20% (10%) και για τη βροχόπτωση πάνω από 70% (40%). Φαίνεται πως το μοντέλο, για την Ελλάδα, είναι περισσότερο ευαίσθητο σε αλλαγές στην τιμή του κατωφλίου της αυτομετρατροπής παρά σε αλλαγές του ρυθμού προσαρμογής.
description: A set of six high resolution (10 km x 10 km) regional climate simulations were carried out over Greece for the period December 1999 – December 2000 using RegCM3 based on different setups for the convective scheme. Specifically, the simulations comprised two experiments using the Grell convective scheme with Fritsch-Chappell (FC) closure assumption and four experiments using the Emanuel convective scheme. The aim of the study is the optimization and evaluation of the model for Greece by comparing simulated values of near surface temperature, precipitation and cloudiness with the respective observed values at 84 Greek stations. The model grid is nested to a coarser RegCM3 European domain (at a resolution of 25km x 25km) driven by the ERA-40 reanalysis dataset. Simulations using the modified Emanuel convective scheme reduce mean bias (and RMSE), compared with that of Grell’s default convective scheme, in temperature over 25% (20%), in cloudiness over 20% (10%) and in precipitation over 70% (40%) Results show that the model for the Greek area is more sensitive to changes in autoconversion threshold than changes in relaxation rate.
Structure factor and dynamics of the helix-coil transition
Creators: name: Kunz, H.
name: Livi, R.
name: Suto, A.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Thermodynamical properties of the helix-coil transition were successfully described in the past by the model of Lifson, Poland and Sheraga. Here we compute the corresponding structure factor and show that it possesses a universal scaling behavior near the transition point, even when the transition is of first order. Moreover, we introduce a dynamical version of this model, that we solve numerically. A Langevin equation is also proposed to describe the dynamics of the density of hydrogen bonds. Analytical solution of this equation shows dynamical scaling near the critical temperature and predicts a gelation phenomenon above the critical temperature. In the case when comparison of the two dynamical approaches is possible, the predictions of our phenomenological theory agree with the results of the Monte Carlo simulations.
description: 11 pages, 7 figures
Wind circumburst density profile: a linear E_p-E_gamma correlation
Creators: name: Nava, L.
name: Ghisellini, G.
name: Ghirlanda, G.
name: Tavecchio, F.
name: Firmani, C.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Ghirlanda et al. (2004) derived the collimation-corrected energy E_gamma for a sample of 15 bursts under the assumption of a homogeneous circumburst density profile. They found a correlation (the so-called Ghirlanda correlation) between E_gamma and the rest frame peak energy of the nuF_nu prompt spectrum (E_p). Nava et al. (2006) showed that, assuming a circumburst density distribuited with a r^-2 wind profile, the Ghirlanda correlation remains tight and becomes linear. This implies that: i) it remains linear also in the comoving frame, no matter the distribution of bulk Lorentz factors, ii) it entails that different bursts have the same number of relevant photons. We have updated these findings including recently detected bursts (21 in total), stressing the two important implications.
description: To be published in the proceedings of the conference "SWIFT and GRBs: Unveiling the Relativistic Universe", Venice, June 5-9, 2006. To appear in "Il Nuovo Cimento"
title: What’s on the menu? Determining feeding rates and selectivity of meroplankton in the Western English Channel with traditional and molecular techniques.
Creators: name: Lindeque, Pennie
name: Fileman, Elaine
name: Harmer, Rachel
name: Pemberton, Katharine
name: Parry, Helen
Publisher: name: ASC 2013 - Theme session F
Year: 2023
Subjects: Ecosystem observation, processes and dynamics

description: No abstracts are to be cited without prior reference to the author. Meroplankton, including the larvae of bivalves and decapods, are an important and yet understudied component of coastal marine food webs. Our study looks at temporal distribution of bivalve and decapod larvae over a 20-year period as part of the Western Channel Observatory time series programme. Over an annual cycle we have conducted a series of experiments on natural bivalve and decapod larvae communities to determine larval ingestion rates and feeding selectivity on natural prey assemblages. Complimentary gut content analysis was performed using a PCR-based method for detecting prey DNA on both animals from experimental and field samples. Results suggest that the larvae are omnivorous, typically feeding on a range of food items from picoeukaryotes through to diatoms and ciliates. They demonstrate selectivity, not always choosing the most abundant prey species present. Since these organisms show highly seasonal abundance peaks, our results have important implications for understanding planktonic food web dynamics in mid-latitudes.
Towards a reconstructive methodology for building a provenance metamodel that fits the complex bioinformatics pipelines
Creators: name: Perseil, Isabelle
name: Holub, Petr
name: Wittner, Rudolf
Publisher: name: Zenodo
Year: 2019
Subjects: Provenance
Metamodel
methodology

description: Defining a methodology for building a provenance metamodel easily instantiable for the most complex bioinformatics pipelines, and use this methodology for simpler models.
The Physical Mechanisms of Fast Radio Bursts
Creators: name: Zhang, Bing
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Fast radio bursts are mysterious millisecond-duration transients prevalent in the radio sky. Rapid accumulation of data in recent years has facilitated an understanding of the underlying physical mechanisms of these events. Knowledge gained from the neighboring fields of gamma-ray bursts and radio pulsars also offered insight. Here I review developments in this fast-moving field.Two generic categories of radiation model invoking either magnetospheres of compact objects (neutron stars or black holes) or relativistic shocks launched from such objects have been much debated. The recent detection of a Galactic fast radio burst in association with a soft gamma-ray repeater suggests that magnetar engines can produce at least some, and probably all, fast radio bursts. Other engines that could produce fast radio bursts are not required, but are also not impossible.
description: Review article published in Nature
Characteristic Sensitivity of Turbulent Flow within a Porous Medium under Initial Conditions
Creators: name: Suzuki, Takehito
Publisher: name: arXiv
Year: 2020
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: Flows within porous media play important roles in many scientific and industrial systems. However, the case wherein such flows become turbulent has not been completely understood, particularly, from a mathematical viewpoint. In this study, the $k-\varepsilon$ model (the variable $k$ denotes the turbulent kinetic energy per unit mass and $\varepsilon$ the dissipation rate for the turbulent kinetic energy), which has been widely used for the usual turbulent flow in a clear fluid, was applied to a turbulent flow through porous media. If a homogeneous, averaged flow and homogeneous isotropic turbulence are assumed, the governing equations for the variables $k$ and $\varepsilon$ describe a straight line as a nullcline common to both the variables. The nullcline was shown to be a line attractor. A temporal evolution of the eddy viscosity was also obtained, and the initial and final values of the eddy viscosity were observed to be related to a power law, indicating universal sensitivity. This sensitivity originates from the common nullcline and is not observed for the usual turbulent flow. Finally, nonlinear mathematical and seismological implications were provided using based on the results obtained.
description: 11 pages, 7 figures, accepted for publication in JPSJ
Strings, Black Holes, and Quantum Information
Creators: name: Kallosh, Renata
name: Linde, Andrei
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We find multiple relations between extremal black holes in string theory and 2- and 3-qubit systems in quantum information theory. We show that the entropy of the axion-dilaton extremal black hole is related to the concurrence of a 2-qubit state, whereas the entropy of the STU black holes, BPS as well as non-BPS, is related to the 3-tangle of a 3-qubit state. We relate the 3-qubit states with the string theory states with some number of D-branes. We identify a set of "large" black holes with the maximally entangled GHZ-class of states and "small" black holes with separable, bipartite and W states. We sort out the relation between 3-qubit states, twistors, octonions, and black holes. We give a simple expression for the entropy and the area of stretched horizon of "small'' black holes in terms of a norm and 2-tangles of a 3-qubit system. Finally, we show that the most general expression for the black hole and black ring entropy in N=8 supergravity/M-theory, which is given by the famous quartic Cartan E_{7(7)} invariant, can be reduced to Cayley's hyperdeterminant describing the 3-tangle of a 3-qubit state.
description: 31 pages, 10 figures. A version to appear in Physical Review
BIDS and the NeuroImaging Data Model (NIDM)
Creators: name: Appelhoff, Stefan
name: Bates, Julianna F.
name: Satrajit Ghosh
name: Keator, David B.
name: Kennedy, David N.
name: Poldrack, Russell
name: Jean-Baptiste Poline
name: Steffener, Jason
name: B. Nolan Nichols
name: Feingold, Franklin
name: Pernet, Cyril
name: Nilsonne, Gustav
name: Maumet, Camille
name: Flandin, Guillaume
name: Gau, Rémi
name: Oostenveld, Robert
name: Dupre, Elizabeth
name: Delorme, Arnaud
name: Markiewicz, Christopher J.
name: Perez, Natacha
name: Helmer, Karl G.
name: Jarecka, Dorota
name: Grethe, Jeffrey S.
name: Patterson, Dianne
name: Auer, Tibor
name: Bartsch, Hauke
name: Nichols, Thomas E.
name: Calhoun, Vince
Publisher: name: F1000 Research Limited
Year: 2019

description: The following statement is designed to clarify the complementary nature of the Brain Imaging Data Structure (BIDS) and the NeuroImaging Data Model (NIDM). It is not designed to be a comprehensive review of either of these initiatives, but rather to highlight the synergy of the co-application of each of these emerging technologies. The context for this statement is the preservation and communication of neuroimaging data and the additional experimental data and analytics that are associated with the neuroimaging data.