cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
title: Residential electricity demand in the European Union: the role of bioeconomy
title: Οικιακή ζήτηση ηλεκτρικής ενέργειας στην Ευρωπαϊκή Ένωση: ο ρόλος της βιοοικονομίας
titleType: AlternativeTitle
Creators: name: Δαϊλά, Φωτεινή-Μαρία
name: Daila, Foteini-Maria
Publisher: name: Πανεπιστήμιο Πειραιώς
Year: 2020
Subjects: subject: Βιοοικονομία
subject: Κλιματική αλλαγή
subject: Κατανάλωση (ηλεκτρικής) ενέργειας
subject: Ενεργειακή αποδοτικότητα
subject: Οικιακή ζήτηση ηλεκτρικής ενέργειας
subject: Μέτρα πολιτικής

description: Έπειτα από τη Συνδιάσκεψη του Κιότο, τα 28 κράτη – μέλη της Ευρωπαϊκής Ένωσης, ανάμεσα σ’ αυτά και η Ελλάδα, εφαρμόζουν μια σειρά από μέτρα πολιτικής για να καταπολεμήσουν την κλιματική αλλαγή και να μειώσουν τις εκπομπές των αερίων του θερμοκηπίου. Για να τα καταφέρουν αυτά, οι ευρωπαϊκές χώρες πρέπει να μειώσουν την κατανάλωση της ηλεκτρικής ενέργειας και να κάνουν τα κτίριά τους περισσότερο ενεργειακά αποδοτικά. Ο στόχος αυτής της διπλωματικής εργασίας είναι να διερευνήσει ποιοι είναι οι κύριοι παράγοντες που σχετίζονται με την κατανάλωση ηλεκτρικής ενέργειας στον οικιακό τομέα. Έτσι, οι υπεύθυνοι θα μπορούν να χαράξουν πολιτικές οι οποίες να συμβάλλουν στη βελτίωση της ενεργειακής αποδοτικότητας και τη μείωση των εκπομπών των αερίων του θερμοκηπίου στα πλαίσια της βιοοικονομίας. Για τον σκοπό αυτό διεξήχθη μια βιβλιογραφική και εμπειρική ανάλυση όσον αφορά την κατανάλωση της ηλεκτρικής ενέργειας στον οικιακό τομέα στην Ευρωπαϊκή Ένωση. Στη συνέχεια, παρουσιάζονται τα αποτελέσματα αυτής της διερεύνησης και προτείνονται μέτρα πολιτικής, ως συνεισφορά στο διάλογο σχετικά με τη ζήτηση της ηλεκτρικής ενέργειας, την ενεργειακή αποδοτικότητα και την κλιματική αλλαγή.
Quantum effective potential, electron transport and conformons in biopolymers
Creators: name: Dandoloff, Rossen
name: Balakrishnan, Radha
Publisher: name: arXiv
Year: 2005
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: In the Kirchhoff model of a biopolymer, conformation dynamics can be described in terms of solitary waves, for certain special cross-section asymmetries. Applying this to the problem of electron transport, we show that the quantum effective potential arising due to the bends and twists of the polymer enables us to formalize and quantify the concept of a {\it conformon} that has been hypothesized in biology. Its connection to the soliton solution of the cubic nonlinear Schrödinger equation emerges in a natural fashion.
description: to appear in J. Phys. A
Evaluation of Giga-bit Ethernet Instrumentation for SalSA Electronics Readout (GEISER)
Creators: name: Varner, Gary S.
name: Murakami, Laine
name: Ridley, David
name: Zhu, Chaopin
name: Gorham, Peter
Publisher: name: arXiv
Year: 2005
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: An instrumentation prototype for acquiring high-speed transient data from an array of high bandwidth antennas is presented. Multi-kilometer cable runs complicate acquisition of such large bandwidth radio signals from an extensive antenna array. Solutions using analog fiber optic links are being explored, though are very expensive. We propose an inexpensive solution that allows for individual operation of each antenna element, operating at potentially high local self-trigger rates. Digitized data packets are transmitted to the surface via commercially available Giga-bit Ethernet hardware. Events are then reconstructed on a computer farm by sorting the received packets using standard networking gear, eliminating the need for custom, very high-speed trigger hardware. Such a system is completely scalable and leverages the hugh capital investment made by the telecommunications industry. Test results from a demonstration prototype are presented.
description: 8 pages, to be submitted to NIM A
Dynamical Aspects of Photoinduced Magnetism and Spin-Crossover phenomena in Prussian Blue Analogs
Creators: name: Nishino, Masamichi
name: Boukheddaden, Kamel
name: Miyashita, Seiji
name: Varret, Francois
Publisher: name: arXiv
Year: 2005
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We present dynamical properties of spin crossover compounds with photomagnetization, proposing a new model in which the spin-crossover phenomena and magnetic ordering are incorporated in a unified way. By using this model, the novel characteristics observed in Prussian blue analogs are qualitatively well reproduced. We investigate the time evolution of the magnetization and high spin fraction taking into account multi-time scales in a master equation approach for the magnetic relaxation, the lattice (electronic) relaxation, and the photoexcitation process. In particular, processes with different temperature cycles starting from the photoinduced saturated magnetic state are studied including the effect of photoirradiation. In the temperature cycle in the low temperature region where the high spin state has a strong metastability, the magnetization almost exactly follows the quasi-static process. On the other hand, when the temperature is raised above the region, the dynamics of the spin state and the magnetization couple and exhibit various types of dynamical cooperative phenomena under time-dependent control of temperature and photoirradiation.
description: 17pages, 7figures
Dependency Smells in JavaScript Projects
Creators: name: Jafari, Abbas Javan
name: Costa, Diego Elias
name: Abdalkareem, Rabe
name: Shihab, Emad
name: Tsantalis, Nikolaos
Publisher: name: arXiv
Year: 2020
Subjects: subject: Software Engineering (cs.SE)
subject: FOS: Computer and information sciences

description: Dependency management in modern software development poses many challenges for developers who wish to stay up to date with the latest features and fixes whilst ensuring backwards compatibility. Project maintainers have opted for varied, and sometimes conflicting, approaches for maintaining their dependencies. Opting for unsuitable approaches can introduce bugs and vulnerabilities into the project, introduce breaking changes, cause extraneous installations, and reduce dependency understandability, making it harder for others to contribute effectively. In this paper, we empirically examine evidence of recurring dependency management issues (dependency smells). We look at the commit data for a dataset of 1,146 active JavaScript repositories to catalog, quantify and understand dependency smells. Through a series of surveys with practitioners, we identify and quantify seven dependency smells with varying degrees of popularity and investigate why they are introduced throughout project history. Our findings indicate that dependency smells are prevalent in JavaScript projects with two or more distinct smells appearing in 80% of the projects, but they generally infect a minority of a project's dependencies. Our observations show that the number of dependency smells tend to increase over time. Practitioners agree that dependency smells bring about many problems including security threats, bugs, dependency breakage, runtime errors, and other maintenance issues. These smells are generally introduced as developers react to dependency misbehaviour and the shortcomings of the npm ecosystem.
description: Keywords: Dependency smells, Software ecosystems, Dependency management, npm
Tribomechanical behaviour of TiAlN and CrAlN coatings deposited onto AISI H11 with different pre-treatments
Creators: name: Tillmann, Wolfgang
name: Grisales, Diego
name: Stangier, Dominic
name: Butzke, Timo
Publisher: name: Technische Universität Dortmund
Year: 2019
Subjects: subject: Magnetron sputtering
subject: Plasma nitriding
subject: TiAlN
subject: CrAlN
subject: AISI H11
subject: Adhesion
subject: Tribology
subject: 620
subject: 670
subject: Tribologie
subject: Adhäsion
subject: Magnetronsputtern

description: In the metalworking industry, different processes and applications require the utilisation of custom designed tools. The selection of the appropriated substrate material and its pre-treatment as well as the protective coating are of great importance in the performance and life time of forming tools, dies, punches and coated parts in general. TiAlN and CrAlN coatings have been deposited onto the hot work tool steel AISI H11 by means of Direct Current Magnetron Sputtering. Prior to the deposition, the steel substrate was modified by the implementation of three different pre-treatments: nitriding of the annealed substrate [Nitr.], heat treatment of the steel (quenching and double tempering) [HT] and nitridation subsequent to a heat treatment of the substrate [HT + Nitr.]. The purpose of this research is to obtain valuable information on the microstructural properties and tribomechanical behaviour of two of the most promising ternary transition metal nitride coatings, TiAlN and CrAlN, when deposited on the AISI H11 steel with different initial properties. The different pre-treatments performed to the steel prior to the deposition favour the tailoring during the design and construction of tools for specific applications. The microstructure, the adhesion and the wear resistance of TiAlN coatings were highly influenced by the substrate preparation. Contrarily, CrAlN results were more independent of the substrate preparation and no high influences were found. For instance, the adhesion of the TiAlN coating varied from 17 to 43 N for the coating deposited onto the HT + Nitr. substrate and the HT substrate respectively, while the lowest and highest adhesion of the CrAlN coating varied between 42 and 53 N for the HT and the HT + Nitr. respectively. Likewise, the wear coefficient of the CrAlN were ten times smaller than those found for the TiAlN coatings, presumably due to the presence of hex-AlN phases and the small differences on the Young´s Modulus of the substrate and the CrAlN coatings.
description: Coatings;9(8)
Accretion on High Derivative Asymptotically Safe Black Holes
Creators: name: Farooq, M. Umar
name: Ahmed, Ayyesha K.
name: Yang, Rong-Jia
name: Jamil, Mubasher
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Asymptotically safe gravity is one effective approach to quantum gravity. It is important to differentiate the modified gravity inspired by asymptotically safe gravity. In this paper, we examine the matter particles dynamics near the improved version of Schwarzschild black hole. We assume that in the context of asymptotically safe gravity scenario the ambient matter surrounding the black hole is of isothermal in nature and investigate the spherical accretion of matter by deriving solutions at critical points. The analysis for the various values of the state parameter for isothermal test fluids, viz., $k=1,~1/2,~1/3,~1/4$ show the possibility of accretion onto asymptotically safe black hole. We formulate the accretion problem as Hamiltonian dynamical system and explain its phase flow in detail which reveals interesting results in asymptotically safe gravity theory.
description: 15 pages, 2 captioned figures
What can be learned from the lensed cosmic microwave background B-mode polarization power spectrum?
Creators: name: Smith, Sarah
name: Challinor, Anthony
name: Rocha, Graca
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The effect of weak gravitational lensing on the cosmic microwave background (CMB) temperature anisotropies and polarization will provide access to cosmological information that cannot be obtained from the primary anisotropies alone. We compare the information content of the lensed B-mode polarization power spectrum, properly accounting for the non-Gaussian correlations between the power on different scales, with that of the unlensed CMB fields and the lensing potential. The latter represent the products of an (idealised) optimal analysis that exploits the lens-induced non-Gaussianity to reconstruct the fields. Compressing the non-Gaussian lensed CMB into power spectra is wasteful and leaves a tight degeneracy between the equation of state of dark energy and neutrino mass that is much stronger than in the more optimal analysis. Despite this, a power spectrum analysis will be a useful first step in analysing future B-mode polarization data. For this reason, we also consider how to extract accurate parameter constraints from the lensed B-mode power spectrum. We show with simulations that for cosmic-variance-limited measurements of the lensed B-mode power, including the non-Gaussian correlations in existing likelihood approximations gives biased parameter results. We develop a more refined likelihood approximation that performs significantly better. This new approximation should also be of more general interest in the wider context of parameter estimation from Gaussian CMB data.
description: 15 pages, 10 figures. Very minor changes to match version accepted by Phys. Rev. D
Flux states of active galactic nuclei
Creators: name: Dorner, Daniela
name: Arbet-Engels, Axel
name: Baack, Dominik
name: Balbo, Matteo
name: Biland, Adrian
name: Blank, Michael
name: Bretz, Thomas
name: Bruegge, Kai
name: Bulinski, Michael
name: Buss, Jens
name: Doerr, Manuel
name: Elsaesser, Dominik
name: Hildebrand, Dorothee
name: Linhoff, Lena
name: Mannheim, Karl
name: Mueller, Sebastian Achim
name: Neise, Dominik
name: Neronov, Andrii
name: Noethe, Maximilian
name: Paravac, Aleksander
name: Rhode, Wolfgang
name: Schleicher, Bernd
name: Schulz, Florian
name: Sedlaczek, Kevin
name: Shukla, Amit
name: Sliusar, Vitalii
name: Willert, Elan Von
name: Walter, Roland
Publisher: name: Technische Universität Dortmund
Year: 2019
Subjects: subject: Active galactic nuclei
subject: Blazars
subject: Monitoring
subject: TeV energies
subject: FACT
subject: Flux states
subject: Flux distributions
subject: Duty cycle
subject: 530

description: Blazars are known to show variability on time scales from minutes to years covering a wide range of flux states. Studying the flux distribution of a source allows for various insights. The shape of the flux distribution can provide information on the nature of the underlying variability processes. The level of a possible quiescent state can be derived from the main part of the distribution that can be described by a Gaussian distribution. Dividing the flux states into quiescent and active, the duty cycle of a source can be calculated. Finally, this allows alerting the multi-wavelength and multi-messenger community in case a source is in an active state. To get consistent and conclusive results from flux distributions, unbiased long-term observations are crucial. Only like this is a complete picture of the variability and flux states, e.g., an all-time quiescent state, possible. In seven years of monitoring of bright TeV blazars, the first G-APD Cherenkov telescope (FACT) has collected a total of more than 11,700 hours of physics data with 1500 hours to 3000 hours per source for Mrk 421, Mrk 501, 1ES 1959+650, and 1ES 2344+51.
description: Galaxies;7(2)
PRODUCT LIFE CYCLE MODEL OF COWPEA BASED PRODUCTS IN GHANA
Creators: name: Nyankori, James Cyprian Okuk
name: Wabukawo, Veronica
name: Sakyi-Dawson, Esther
name: Sefa-Dedeh, Sam
name: Nyankori, James Cyprian Okuk
name: Wabukawo, Veronica
name: Sakyi-Dawson, Esther
name: Sefa-Dedeh, Sam
Publisher: name: Unknown
Year: 2002
Subjects: Industrial Organization

description: An exploratory market study of cowpea products in Ghana using data from case studies of consumers, personal interviews of processors and market surveillance of retail outlets indicated that the cowpea processing industry has low milling capacity, low production level, and few small operators most of whom have been in the business for less than six years. Cowpea flour, the main value added product, is typically sold in bulk or unbranded small packages through retail and wholesale outlets and directly to consumers including individuals, institutions and the catering industry. Although a high proportion of processors are aware of the new cowpea utilization technologies, only a low percentage have capacity expansion plans within the next two years. A large majority is uncertain and a small percentage has no expansion plans in the next two years. Cowpea products are widely consumed but are facing increasing competition from soybean especially in weaning mixes. However, there are several dishes using cowpea flour produced in the household and these provide a varied nutritious diet and have added desirable attributes which include easy cooking, availability, and favorable taste. The cowpea products industry is a nascent industry, apparently in stage two of the product life cycle, the introduction stage, which is characterized by a limited number of competing firms, low profitability, and high prices. The full impact of new utilization technologies will be realized over several years following substantial private capital investments in processing, marketing and strategic promotional activities.
Επιλογή, αξιολόγηση & εκπαίδευση προσωπικού στον κλάδο της ναυτιλίας
Creators: name: Κελέσης, Κωνσταντίνος Γεώργιος
Publisher: name: Πανεπιστήμιο Πειραιώς
Year: 2020
Subjects: subject: Ναυτιλία
subject: Διοίκηση ανθρώπινου δυναμικού
subject: Επιλογή προσωπικού
subject: Αξιολόγηση προσωπικού
subject: Εκπαίδευση προσωπικού
subject: Κριτήρια επιλογής προσωπικού
subject: Προσωπικό ξηράς
subject: Προσωπικό στελέχωσης πλοίων
subject: Ναυτικοί
subject: Ναυτιλιακές επιχειρήσεις
subject: Ναυτεργατική αγορά
subject: Μέθοδοι αξιολόγησης

description: Η συγκεκριμένη έρευνα εξετάζει και παραθέτει τις έννοιες της διοίκησης ανθρωπίνων πόρων, της αναζήτησης προσωπικού, της τελικής επιλογής του προσωπικού, της εκπαίδευσης και της αξιολόγησης του από τις επιχειρήσεις του σήμερα. Επιπλέον, η έρευνα μελετάει τις παραπάνω έννοιες και διαδικασίες με εστίαση στο τομέα της ναυτιλίας, καθώς πρόκειται για έναν τομέα δραστηριότητας με έχει ιδιαίτερες απαιτήσεις, τόσο σε εταιρικό επίπεδο όσο και σε εργασιακό αλλά και σε επίπεδο διοίκησης ανθρώπινων πόρων.
Embracing the future Internet of Things
Creators: name: Cirillo, Flavio
name: Wu, Fang-Jing
name: Solmaz, Gürkan
name: Kovacs, Ernö
Publisher: name: Technische Universität Dortmund
Year: 2019
Subjects: subject: Internet-of-Things
subject: Smart cities
subject: Hyper-connected IoT
subject: Context management
subject: Linked data
subject: Semantic interoperability
subject: Knowledge graph
subject: 620

description: All of the objects in the real world are envisioned to be connected and/or represented, through an infrastructure layer, in the virtual world of the Internet, becoming Things with status information. Services are then using the available data from this Internet-of-Things (IoT) for various social and economical benefits which explain its extreme broad usage in very heterogeneous fields. Domain administrations of diverse areas of application developed and deployed their own IoT systems and services following disparate standards and architecture approaches that created a fragmentation of things, infrastructures and services in vertical IoT silos. Coordination and cooperation among IoT systems are the keys to build “smarter” IoT services boosting the benefits magnitude. This article analyses the technical trends of the future IoT world based on the current limitations of the IoT systems and the capability requirements. We propose a hyper-connected IoT framework in which “things” are connected to multiple interdependent services and describe how this framework enables the development of future applications. Moreover, we discuss the major limitations in today’s IoT and highlight the required capabilities in the future. We illustrate this global vision with the help of two concrete instances of the hyper-connected IoT in smart cities and autonomous driving scenarios. Finally, we analyse the trends in the number of connected “things” and point out open issues and future challenges. The proposed hyper-connected IoT framework is meant to scale the benefits of IoT from local to global.
description: Sensors;19(2)
title: Ανάπτυξη web εφαρμογής με θέμα τον τουρισμό και χρήση MERN Stack (MongoDB, Express, React, Node)
title: Web tourist application development using MERN Stack (MongoDB, Express, React, Node)
titleType: AlternativeTitle
Creators: name: Μαχζούμπ, Ντάνυ
Publisher: name: Πανεπιστήμιο Πειραιώς
Year: 2021
Subjects: subject: MERN
subject: Website
subject: Tourism
subject: FOS: Economics and business
subject: MongoDB
subject: Express
subject: React
subject: Node

description: Θέμα της Μεταπτυχιακής Διατριβής είναι η δημιουργία μιας ιστοσελίδας με την ονομασία TripSpot, που αφορά τον τουρισμό. Σκοπός της ιστοσελίδας είναι οι χρήστες να μπορούν να ανακαλύψουν ή να προτείνουν διάφορα τουριστικά μέρη του κόσμο. Επιπρόσθετα, μπορούν να διαβάσουν και να γράψουν κριτικές για αυτά και να αλληλεπιδρούν μέσω μηνυμάτων μεταξύ των υπόλοιπων χρηστών. Όλα τα παραπάνω, κάνουν πιο ευχάριστη την εμπειρία του χρήστη στην ιστοσελίδα και τον βοηθούν να μπορέσει να οργανώσει ένα ταξίδι του. Η τεχνολογία που χρησιμοποιήθηκε για την δημιουργία της ιστοσελίδας είναι η MERN Stack ( MongoDB, Express, React, Node).
Chiral kinetic theory of anomalous transport induced by torsion
Creators: name: Gao, Lan-Lan
name: Kaushik, Sahal
name: Kharzeev, Dmitri E.
name: Philip, Evan John
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In Weyl semimetals subjected to torsion, there are two different kinds of chirality: i) the (coordinate-space) shape of the twisted crystal is chiral, and ii) the momentum space contains chiral quasi-particles. Here we construct a general kinetic theory of anomalous transport using the phase space (coordinate and momentum spaces combined) Berry curvature induced by torsion in Weyl systems. We describe how torsion generates the chiral chemical potential, and thus leads to the Chiral Magnetic Effect (CME) in the presence of a background magnetic field. We propose to measure the CME current induced by the torsion as a way to detect the anomalous coupling between the coordinate-space and momentum-space chiralities.
Corrosion and corrosion fatigue properties of additively manufactured magnesium alloy WE43 in comparison to titanium alloy Ti-6Al-4V in physiological environment
Creators: name: Wegner, Nils
name: Kotzem, Daniel
name: Wessarges, Yvonne
name: Emminghaus, Nicole
name: Hoff, Christian
name: Tenkamp, Jochen
name: Hermsdorf, Jörg
name: Overmeyer, Ludger
name: Walther, Frank
Publisher: name: Technische Universität Dortmund
Year: 2019
Subjects: subject: Additive manufacturing
subject: Laser powder bed fusion (L-PBF)
subject: Magnesium alloy WE43
subject: Titanium alloy Ti-6Al-4V
subject: Biomaterials
subject: Corrosion
subject: In vitro fatigue
subject: 660
subject: Rapid Prototyping
subject: Selective-Laser-Melting
subject: Magnesiumlegierung
subject: Titanlegierung
subject: Biomaterial
subject: Korrosion
subject: Materialermüdung

description: Laser powder bed fusion (L-PBF) of metals enables the manufacturing of highly complex geometries which opens new application fields in the medical sector, especially with regard to personalized implants. In comparison to conventional manufacturing techniques, L-PBF causes different microstructures, and thus, new challenges arise. The main objective of this work is to investigate the influence of different manufacturing parameters of the L-PBF process on the microstructure, process-induced porosity, as well as corrosion fatigue properties of the magnesium alloy WE43 and as a reference on the titanium alloy Ti-6Al-4V. In particular, the investigated magnesium alloy WE43 showed a strong process parameter dependence in terms of porosity (size and distribution), microstructure, corrosion rates, and corrosion fatigue properties. Cyclic tests with increased test duration caused an especially high decrease in fatigue strength for magnesium alloy WE43. It can be demonstrated that, due to high process-induced surface roughness, which supports locally intensified corrosion, multiple crack initiation sites are present, which is one of the main reasons for the drastic decrease in fatigue strength.
description: Materials;12(18)
AN ANALYSIS OF ALTERNATIVE NET PRESENT VALUE CAPITAL INVESTMENT DECISION MODELS
Creators: name: Bradford, Garnett L.
name: Miller, Stephen E.
name: Bradford, Garnett L.
name: Miller, Stephen E.
Publisher: name: Unknown
Year: 1998
Subjects: Research Methods/ Statistical Methods

description: We have found that the disagreement between Returns-to-Assets (RTA) and Returns-to-Equity (RTE) proponents is not confined to agricultural economics. Depending on the course they are taking and the accompanying text, students are likely to learn that there is a "right" way to calculate Net Present Values (NPVs), either by the RTA method or the RTE method. In most cases, only one of the two methods is discussed and illustrated with numerical examples. Less common are texts that compare the two methods, discuss their underlying assumptions, or show how the NPVs from the two methods can be reconciled. The paper is organized as follows. The first section of the main body of the paper provides a comparative overview of the RTA and RTE methods; the second section discusses our textbook survey; the final section offers our conclusions. Appendix A contains a brief history of the theoretical development of discounted cash flow (DCF) concepts. Appendix B contains additional details on defining components of NPV models. Finally, Appendix C is a listing of some additional references.
Joint Person Objectness and Repulsion for Person Search
Creators: name: Yao, Hantao
name: Xu, Changsheng
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Person search targets to search the probe person from the unconstrainted scene images, which can be treated as the combination of person detection and person matching. However, the existing methods based on the Detection-Matching framework ignore the person objectness and repulsion (OR) which are both beneficial to reduce the effect of distractor images. In this paper, we propose an OR similarity by jointly considering the objectness and repulsion information. Besides the traditional visual similarity term, the OR similarity also contains an objectness term and a repulsion term. The objectness term can reduce the similarity of distractor images that not contain a person and boost the performance of person search by improving the ranking of positive samples. Because the probe person has a different person ID with its \emph{neighbors}, the gallery images having a higher similarity with the \emph{neighbors of probe} should have a lower similarity with the probe person. Based on this repulsion constraint, the repulsion term is proposed to reduce the similarity of distractor images that are not most similar to the probe person. Treating the Faster R-CNN as the person detector, the OR similarity is evaluated on PRW and CUHK-SYSU datasets by the Detection-Matching framework with six description models. The extensive experiments demonstrate that the proposed OR similarity can effectively reduce the similarity of distractor samples and further boost the performance of person search, e.g., improve the mAP from 92.32% to 93.23% for CUHK-SYSY dataset, and from 50.91% to 52.30% for PRW datasets.
Development of subjective well-being in adolescence
Creators: name: Steinmayr, Ricarda
name: Wirthwein, Linda
name: Modler, Laura
name: Barry, Margaret M.
Publisher: name: Technische Universität Dortmund
Year: 2019
Subjects: subject: Subjective well-being
subject: Personality
subject: Parental engagement
subject: Parental expectations
subject: Intelligence
subject: Gender
subject: Socio-economic status
subject: Academic achievement
subject: 150
subject: Jugend
subject: Wohlbefinden
subject: Persönlichkeit
subject: Soziale Herkunft
subject: Eltern
subject: Erwartungshaltung

description: Despite the importance of subjective well-being (SWB) for students’ mental and physical health, there is a lack of longitudinal studies investigating the development of SWB in adolescents and what factors are associated with it over time. The present study seeks to shed further light on this question by investigating adolescents longitudinally. A sample of German academic tracks students (N = 476) from five schools were followed longitudinally over a time period of 30 months with four measurement points from Grade 11 to Grade 13. Alongside the longitudinal assessment of SWB (mood and life satisfaction), a range of other factors were also assessed at t1 including; demographic factors (sex, age, socio-economic status (HISEI)), intelligence, grades (report cards provided by the schools), personality (neuroticism, extraversion) and perceived parental expectations and support. Latent growth curve models were conducted to investigate the development of SWB and its correlates. On average, mood and life satisfaction improved at the end of mandatory schooling. However, students significantly differed in this pattern of change. Students’ life satisfaction developed more positively if students had good grades at t1. Furthermore, even though introverted students started with lower life satisfaction at t1, extraverts’ life showed greater increases over time. Changes in mood were associated with socio-economic background; the higher the HISEI the more positive the change. As social comparisons in school performance are almost inevitable, schools should intervene to buffer the influence of school grades on students’ SWB.
description: Int. J. Environ. Res. Public Health;16(19)
Η κεφαλαιακή δομή των τραπεζών: μία θεωρητική προσέγγιση
Creators: name: Tσουμάνης, Φώτιος
Publisher: name: Πανεπιστήμιο Πειραιώς
Year: 2020
Subjects: subject: Κεφαλαιακή διάρθρωση
subject: Ρευστότητα
subject: Τράπεζες
subject: Επιχειρηματίας

description: Η παρούσα διατριβή αναφέρεται σε ένα επίκαιρο ζήτημα, αυτό της κεφαλαιακής δομής των τραπεζών. Αρχικά γίνεται βιβλιογραφική ανασκόπηση και καλύπτονται διάφορα βασικά ζητήματα, όπως οι λόγοι ύπαρξης των χρηματοπιστωτικών ιδρυμάτων, η αναγκαιότητα ύπαρξης κεφαλαιακών διαθεσίμων από τις τράπεζες, η ρευστότητα και η δημιουργία ρευστότητας και η κεφαλαιακή δομή των τραπεζών και οι παράγοντες που την επηρεάζουν. Το τελευταίο αυτό ζήτημα διερευνήθηκε περαιτέρω, μέσω της παρουσίασης του μοντέλου που αναπτύχθηκε στο άρθρο των Diamond & Rajan (2000), αλλά και μέσω του σχολιασμού δύο μεταγενέστερων άρθρων των μελετητών. Επίσης, χρησιμοποιήθηκαν αριθμητικά παραδείγματα για τον υπολογισμό του τρόπου διάρθρωσης των κεφαλαίων των τραπεζών.
Porosity characterization and its effect on thermal properties of APS-sprayed alumina coatings
Creators: name: Tillmann, Wolfgang
name: Khalil, Omar
name: Abdulgader, Mohamed
Publisher: name: Technische Universität Dortmund
Year: 2019
Subjects: subject: Atmospheric plasma spray (APS) process
subject: Particle size
subject: Thermal insulation
subject: Thermal barrier coating (TBC)
subject: Thermal diffusivity
subject: Coating microstructure
subject: Coating porosity
subject: 620
subject: 670
subject: Plasmaspritzen
subject: Teilchengröße
subject: Wärmeschutz
subject: Beschichtung
subject: Temperaturleitfähigkeit
subject: Mikrostruktur
subject: Porosität

description: In the thermal spraying process, the porosity of ceramic coatings contributes directly to the efficiency of the thermal insulation. The size, shape, and distribution of the pores determine the level of both thermal and sintering resistance. In this work, three different atmospheric plasma sprayed (APS) alumina coatings were fabricated with the same spraying parameters using alumina powders with fine, medium, and coarse particle size. The microstructure of the obtained coatings was analyzed regarding the obtained total porosity, pore size, and pore shape. It was found that it is expedient to divide the pore size range into fine, medium, and large sizes. The shape was characterized with regard to the circularity aspect. In this way, all types of cracks can be considered as oblate pores and were included in the calculation of the total porosity. In the case of using fine feedstock powder, the densest coatings were produced among all coatings, and the fraction of fine pores and cracks are thereby substantially higher. However, the total porosity increases with increasing feedstock powder size. A connection was also made between thermal insulation and porosity fraction which includes fine pores and cracks.
description: Coatings;9(10)
First-principles effective-mass Hamiltonian for semiconductor nanostructures in a magnetic field
Creators: name: Foreman, Bradley A.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: A multi-band effective-mass Hamiltonian is derived for lattice-matched semiconductor nanostructures in a slowly varying external magnetic field. The theory is derived from the first-principles magnetic-field coupling Hamiltonian of Pickard and Mauri, which is applicable to nonlocal norm-conserving pseudopotentials in the local density approximation to density functional theory. The pseudopotential of the nanostructure is treated as a perturbation of a bulk reference crystal, with linear and quadratic response terms included in k.p perturbation theory. The resulting Hamiltonian contains several interface terms that have not been included in previous work on nanostructures in a magnetic field. The derivation provides the first direct analytical expressions showing how the coupling of the nonlocal potential to the magnetic field influences the effective magnetic dipole moment of the electron.
description: 12 pages, no figures
Optical Production of Ultracold Polar Molecules
Creators: name: Sage, J. M.
name: Sainis, S.
name: Bergeman, T.
name: DeMille, D.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: We demonstrate the production of ultracold polar RbCs molecules in their vibronic ground state, via photoassociation of laser-cooled atoms followed by a laser-stimulated state transfer process. The resulting sample of $X ^1Σ^+ (v=0)$ molecules has a translational temperature of $\sim100 μ$K and a narrow distribution of rotational states. With the method described here it should be possible to produce samples even colder in all degrees of freedom, as well as other bi-alkali species.
Thermal effects in dissimilar magnetic pulse welding
Creators: name: Bellmann, Jörg
name: Lueg-Althoff, Jörn
name: Schulze, Sebastian
name: Hahn, Marlon
name: Gies, Soeren
name: Beyer, Eckhard
name: Tekkaya, A. Erman
Publisher: name: Technische Universität Dortmund
Year: 2019
Subjects: subject: Magnetic pulse welding
subject: Dissimilar metal welding
subject: Solid state welding
subject: Welding window
subject: Cloud of particles
subject: Jet
subject: Surface activation
subject: 620
subject: 670

description: Magnetic pulse welding (MPW) is often categorized as a cold welding technology, whereas latest studies evidence melted and rapidly cooled regions within the joining interface. These phenomena already occur at very low impact velocities, when the heat input due to plastic deformation is comparatively low and where jetting in the kind of a distinct material flow is not initiated. As another heat source, this study investigates the cloud of particles (CoP), which is ejected as a result of the high speed impact. MPW experiments with different collision conditions are carried out in vacuum to suppress the interaction with the surrounding air for an improved process monitoring. Long time exposures and flash measurements indicate a higher temperature in the joining gap for smaller collision angles. Furthermore, the CoP becomes a finely dispersed metal vapor because of the higher degree of compression and the increased temperature. These conditions are beneficial for the surface activation of both joining partners. A numerical temperature model based on the theory of liquid state bonding is developed and considers the heating due to the CoP as well as the enthalpy of fusion and crystallization, respectively. The time offset between the heat input and the contact is identified as an important factor for a successful weld formation. Low values are beneficial to ensure high surface temperatures at the time of contact, which corresponds to the experimental results at small collision angles
description: Metals;Vol. 9, 3, 348
SCHOOL CHARACTERISTICS AND ACADEMIC PERFORMANCE IN UGANDA: EVIDENCE FROM 2001 PRIMARY LEAVING EXAMINATIONS RESULTS
Creators: name: Wabukawo, Veronica
name: Nyankori, James Cyprian Okuk
name: Wabukawo, Veronica
name: Nyankori, James Cyprian Okuk
Publisher: name: Unknown
Year: 2002
Subjects: Teaching/Communication/Extension/Profession

description: Effect of staffing, supplies and facilities on primary school performance in Uganda was estimated using OLS on district level data. Parameter estimates and significance tests show that textbooks have an important influence on performance under prevailing levels of staffing and facilities. In addition, performance in schools in the northern region was lower than in the central region. This study suggests that considerable improvements in performance can be attained by additional expenditure on school textbooks.
LSTM Prediction Code and Dataset extracated from Kaggle dataset
Creators: name: Khan, Mehmood Ali
Publisher: name: Zenodo
Year: 2024

description: # LSTM-based-Short-Term-Wind-Power-ForecastingIn this study, an advanced version of RNN known as Long Short-Term Memory (LSTM) networks is used for wind power prediction. This implementation contains stacked LSTM and bidirectional LSTM models for short term (hour a head) wind power forecasting.Supported Python version to run this code is 2.7 with google tensor flow deep learning library.Use runProject.py as project startup file.
Εναλλακτικές μορφές ενέργειας στη ναυτιλία και οι επιπτώσεις τους στο περιβάλλον
Creators: name: Τσέλιου, Εβελίνα
Publisher: name: Πανεπιστήμιο Πειραιώς
Year: 2020
Subjects: subject: Ναυτιλία
subject: Διοίκηση
subject: Περιβάλλον

description: Είναι αλήθεια ότι σε παγκόσμιο επίπεδο έχει γίνει αξιόλογη προσπάθεια για την προστασία του περιβάλλοντος αλλά και για να μειωθεί η περιβαλλοντική επίπτωση που προκαλείται από τη δραστηριότητα των πλοίων. Κύριος στόχος της συγκεκριμένης διπλωματικής εργασίας είναι να παρουσιαστούν οι τρόποι με τους οποίους η ναυτιλία επηρεάζει το περιβάλλον, ο τρόπος διαχείρισης των ρυπογόνων διαδικασιών και των παραγώγων τους από τις εταιρίες που ανήκουν στον κλάδο αλλά και η σχετική νομοθεσία που καλύπτει αυτό το φάσμα. Τα παραπάνω θέματα θα διερευνηθούν και θα απεικονιστούν οι τρόποι με τους οποίους οι ναυτιλιακές εταιρίες δραστηριοποιούνται έτσι ώστε να γίνουν σημαντικές αλλαγές στις καθημερινές διαδικασίες με στόχο τη περιβαλλοντική προστασία.
Algebraic representation of correlation functions in integrable spin chains
Creators: name: Boos, H.
name: Jimbo, M.
name: Miwa, T.
name: Smirnov, F.
name: Takeyama, Y.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: Quantum Algebra (math.QA)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: Taking the XXZ chain as the main example, we give a review of an algebraic representation of correlation functions in integrable spin chains obtained recently. We rewrite the previous formulas in a form which works equally well for the physically interesting homogeneous chains. We discuss also the case of quantum group invariant operators and generalization to the XYZ chain.
description: 31 pages, no figure
Models for the development of tumours in neurofibromatosis 2
Creators: name: Woods, Ryan R.
Publisher: name: University of British Columbia
Year: 2009

description: Neurofibromatosis 2 (NF2) is a rare genetic disease that affects approximately 1 in 40000 people, some of the characteristic features of this disease include the onset of multiple tumours on the cranial and spinal nerves, juvenile cataracts and hearing loss. Almost all affected individuals develop bilateral tumours of the Schwann cells that line the vestibular nerves; these tumours are called as vestibular schwannomas (VS). Evidence from molecular genetic studies has suggested that a "2-hit" hypothesis is appropriate for the development of VS in patients with NF2; that is to say that a tumour cell develops from a normal Schwann cell after the cell sustains two mutations to its genetic material. Several authors have proposed probabilistic models for this process and have shown that such models are consistent with incidence data for several different types of cancer. We will discuss a selection of probabilistic models for a "2-hit" hypothesis and present the results from the fitting of such models to incidence data from NF2 patients. Molecular evidence does not exclude the possibility that additional hits are necessary for the development of VS; we will discuss a "3-hit" model and compare the model's fit to both the data and to the fit of the "2-hit" models. Genotypephenotype correlations have been reported in patients with NF2 and thus a model that incorporates a patient's genotype is presented and discussed. Finally, a bivariate model is proposed to estimate the distributions of the ages at onset of both the first and second VS.
A marine radioisotope gamma-ray spectrum analysis method based on Monte Carlo simulation and MLP neural network
Creators: name: Dai, Wenhan
name: Zeng, Zhi
name: Dou, Daowei
name: Ma, Hao
name: Chen, Jianping
name: Li, Junli
name: Zhang, Hui
Publisher: name: arXiv
Year: 2020
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: Machine Learning (cs.LG)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: The monitoring of Cs-137 in seawater using scintillation detector relies on the spectrum analysis method to extract the Cs-137 concentration. And when in poor statistic situation, the calculation result of the traditional net peak area (NPA) method has a large uncertainty. We present a machine learning based method to better analyze the gamma-ray spectrum with low Cs-137 concentration. We apply multilayer perceptron (MLP) to analyze the 662 keV full energy peak of Cs-137 in the seawater spectrum. And the MLP can be trained with a few measured background spectrums by combining the simulated Cs-137 signal with measured background spectrums. Thus, it can save the time of preparing and measuring the standard samples for generating the training dataset. To validate the MLP-based method, we use Geant4 and background gamma-ray spectrums measured by a seaborne monitoring device to generate an independent test dataset to test the result by our method and the traditional NPA method. We find that the MLP-based method achieves a root mean squared error of 0.159, 2.3 times lower than that of the traditional net peak area method, indicating the MLP-based method improves the precision of Cs-137 concentration calculation
description: 13 pages, 11 figures
A REGIONAL COMPARISON OF U.S. COTTON BASIS PATTERNS
Creators: name: Seamon, V. Frederick
name: Kahl, Kandice H.
name: Curtis, Charles E.
name: Seamon, V. Frederick
name: Kahl, Kandice H.
name: Curtis, Charles E.
Publisher: name: Unknown
Year: 1997
Subjects: Demand and Price Analysis

description: The basis, defined as the cash price minus the futures price, is important when making marketing decisions. The cotton basis is calculated using the July futures price for six major cotton marketing regions in the U.S. for August 1993 to November 1997. Graphs of the average basis for the four complete crop years show that the basis generally followed the expected seasonal pattern. The basis tended to be weakest at harvest and to strengthen later in the crop year. However, a visual inspection showed regional differences in the seasonal pattern. Regional differences in the yearly variability in the basis were also observed. Thus, the usefulness of the average historical basis in predicting the future basis appears to differ depending on the region.
Dominance Based Crossover Operator for Evolutionary Multi-objective Algorithms
Creators: name: Roudenko, Olga
name: Schoenauer, Marc
Publisher: name: arXiv
Year: 2005
Subjects: subject: Artificial Intelligence (cs.AI)
subject: Numerical Analysis (math.NA)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: In spite of the recent quick growth of the Evolutionary Multi-objective Optimization (EMO) research field, there has been few trials to adapt the general variation operators to the particular context of the quest for the Pareto-optimal set. The only exceptions are some mating restrictions that take in account the distance between the potential mates - but contradictory conclusions have been reported. This paper introduces a particular mating restriction for Evolutionary Multi-objective Algorithms, based on the Pareto dominance relation: the partner of a non-dominated individual will be preferably chosen among the individuals of the population that it dominates. Coupled with the BLX crossover operator, two different ways of generating offspring are proposed. This recombination scheme is validated within the well-known NSGA-II framework on three bi-objective benchmark problems and one real-world bi-objective constrained optimization problem. An acceleration of the progress of the population toward the Pareto set is observed on all problems.
Gedanken über die vierte Vollversammlung des Ökumenischen Rates der Kirchen in Uppsala
Creators: name: Nissiotis, Nikos A.
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 18 Nr. 1 (1969): Ökumenische Rundschau, Band 18, Heft 1
Double-Exchange Enhanced Magnetic Blue-Shift of Mott Gaps
Creators: name: Hafez-Torbati, Mohsen
name: Bossini, Davide
name: Anders, Frithjof B.
name: Uhrig, Götz S.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: A substantial energy gap of charge excitations induced by strong correlations is the characteristic feature of Mott insulators. We study how the Mott gap is affected by long-range antiferromagnetic order. Our key finding is that the Mott gap is increased by the magnetic ordering: a magnetic blue-shift (MBS) occurs. Thus, the effect is proportional to the exchange coupling in the leading order in the Hubbard model. In systems with additional localized spins the double-exchange mechanism induces an additional contribution to the MBS which is proportional to the hopping in the leading order. The coupling between spin and charge degrees of freedom bears the potential to enable spin-to-charge conversion in Mott systems on extreme time scales determined by hopping and exchange only, since a spin-orbit mediated transfer of angular momentum is not involved in the process. In view of spintronic and magnonic applications, it is highly promising to observe that several entire classes of compounds show exchange and double-exchange effects. Exemplarily, we show that the magnetic contribution to the band-gap blue-shift observed in the optical conductivity of $α$-MnTe is correctly interpreted as the MBS of a Mott gap.
description: 13 pages, 12 figures