cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Velocity Distributions of Granular Gases with Drag and with Long-Range Interactions
Creators: name: Kohlstedt, K.
name: Snezhko, A.
name: Sapozhnikov, M. V.
name: Aranson, I. S.
name: Olafsen, J. S.
name: Ben-Naim, E.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We study velocity statistics of electrostatically driven granular gases. For two different experiments: (i) non-magnetic particles in a viscous fluid and (ii) magnetic particles in air, the velocity distribution is non-Maxwellian, and its high-energy tail is exponential, P(v) ~ exp(-|v|). This behavior is consistent with kinetic theory of driven dissipative particles. For particles immersed in a fluid, viscous damping is responsible for the exponential tail, while for magnetic particles, long-range interactions cause the exponential tail. We conclude that velocity statistics of dissipative gases are sensitive to the fluid environment and to the form of the particle interaction.
description: 4 pages, 3 figures
Aname flexicaudula Wilson & Harvey & Simmons & Rix 2025
Creators: name: Wilson, Jeremy D.
name: Harvey, Mark S.
name: Simmons, Leigh W.
name: Rix, Michael G.
Publisher: name: Zenodo
Year: 2025
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Araneae
Anamidae
Aname
Aname flexicaudula

description: Aname flexicaudula -complex
Figs 4D, 13, 101–102
Composition
The flexicaudula- complex includes two described species: A. broadwater sp. nov. and A. flexicaudula sp. nov.
description: Published as part of Wilson, Jeremy D., Harvey, Mark S., Simmons, Leigh W. & Rix, Michael G., 2025, An integrative systematic revision of the wishbone spiders (Araneae: Anamidae: Aname L. Koch, 1873) of subtropical and tropical eastern Australia, with the description of 55 new species, pp. 1-298 in European Journal of Taxonomy 985 on page 158, DOI: 10.5852/ejt.2025.985.2845, http://zenodo.org/record/15169471
A comparative study of 2D image segmentation algorithms for traumatic brain lesions using CT data from the ProTECTIII multicenter clinical trial
Creators: name: Jadon, Shruti
name: Leary, Owen P.
name: Pan, Ian
name: Harder, Tyler J.
name: Wright, David W.
name: Merck, Lisa H.
name: Merck, Derek L.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Image and Video Processing (eess.IV)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Machine Learning (cs.LG)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: Automated segmentation of medical imaging is of broad interest to clinicians and machine learning researchers alike. The goal of segmentation is to increase efficiency and simplicity of visualization and quantification of regions of interest within a medical image. Image segmentation is a difficult task because of multiparametric heterogeneity within the images, an obstacle that has proven especially challenging in efforts to automate the segmentation of brain lesions from non-contrast head computed tomography (CT). In this research, we have experimented with multiple available deep learning architectures to segment different phenotypes of hemorrhagic lesions found after moderate to severe traumatic brain injury (TBI). These include: intraparenchymal hemorrhage (IPH), subdural hematoma (SDH), epidural hematoma (EDH), and traumatic contusions. We were able to achieve an optimal Dice Coefficient1 score of 0.94 using UNet++ 2D Architecture with Focal Tversky Loss Function, an increase from 0.85 using UNet 2D with Binary Cross-Entropy Loss Function in intraparenchymal hemorrhage (IPH) cases. Furthermore, using the same setting, we were able to achieve the Dice Coefficient score of 0.90 and 0.86 in cases of Extra-Axial bleeds and Traumatic contusions, respectively.
description: 9 pages, 3 figures, 3 tables
Rosenkranz, Gerhard, Der christliche Glaube angesichts der Weltreligionen
Creators: name: Krüger
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 16 Nr. 3 (1967): Ökumenische Rundschau, Band 16, Heft 3
THE UNITED STATES IN THE GLOBAL SOYBEAN MARKET: WHERE DO WE GO FROM HERE?
Creators: name: Bolling, H. Christine
name: Somwaru, Agapi
name: Kruse, Jamie Brown
name: Bolling, H. Christine
name: Somwaru, Agapi
name: Kruse, Jamie Brown
Publisher: name: Unknown
Year: 2001
Subjects: Crop Production/Industries
International Relations/Trade

description: This study applies the concept of a dynamic dominant-firm oligopoly model to the international soybean market. It has been suggested that the international soybean market should be viewed as an oligopoly among exporting nations. Consistent with Gaskins (1971) dynamic dominant firm model, our results indicate that the current U.S. loan deficiency-payment prices and their predecessors created an environment in which smaller (fringe) exporters could prosper and expand. The reduction of U.S. market share is thus a logical outcome of an "optimally managed decline" a la Gaskins. The study finds U.S. market share to decline at a reducing rate and predicts U.S. market share eventually to stabilize, given the expanding international market for soybeans and products. Recognition of the structure of international soybean market has policy implications for the 2002 farm program as the classic dominant firm model suggests.
Analysis of the s-layer transporter mechanism and smooth lipopolysaccharide synthesis in caulobacter crescentus
Creators: name: Awram, Peter Alan
Publisher: name: University of British Columbia
Year: 2009

description: C. crescentus is a Gram-negative bacterium that possesses an hexagonal array called the S-layer that covers the entire outer surface of the bacterium. This array is composed of an estimated 60 000 copies of the 98 kDa protein RsaA. RsaA secretion is directed by a C-terminal secretion signal located in the last 82 amino acids of the protein. Once RsaA is secreted from the cell, it assembles into the S-layer and attaches to the outer membrane via a specific species of smooth lipopolysaccharide (S-LPS). The mechanisms required for the secretion of RsaA and the synthesis of the S-LPS were examined in this thesis. Tn5 mutagenesis of wildtype C. crescentus demonstrated the presence of two genes, rsaD and rsaE, 3' of the rsaA gene that were required for transport of RsaA. These genes were isolated and are capable of complementing the Tn5 mutations 3' of RsaA in trans. The resulting proteins of rsaD and rsaE belong to the type I secretion family that uses three components: an ATP Binding Cassette-transporter (RsaD), a Membrane Fusion Protein (RsaE) and an outer membrane protein (OMP), to secrete proteins through both membranes of Gramnegative bacteria. The OMP, RsaF, of the Rsa system was found by screening the partial Caulobacter genome sequence for sequence identity to other type I OMPs. The gene for RsaF is found 5 kb 3' of rsaE. Deletion of the N-terminus or C-terminus of RsaF prevents the Rsa secretion mechanism from functioning. The secretion of the S-layer subunits in a number of other Caulobacter species was also examined. A partial ORF from FWC27 with 44.6% identity to RsaA was isolated. In addition, the ABC-transporter components from FWC6, FWC8 and FWC39 were isolated. These components were >95% identical to RsaD. These results were used to explore the evolutionary relationships between the different Caulobacter species. Eighteen Tn5 mutations resulting in the inability of the S-layer to attach to the surface of the bacterium were also isolated. Southern blot analysis demonstrated that twelve of these insertions were linked to the Rsa transporters. The Tn5 insertion points were isolated and sequenced allowing identification of several putative genes involved in S-LPS synthesis from the Caulobacter genome sequence. A total of twelve open reading frames (ORFs) were found by Tn5 mapping and two more were found 3' of rsaE. Six of these putative genes may code for proteins involved in the synthesis of sugar residues including five that make perosamine. Five of the genes appear to be glycosyltransferases involved in forming the linkages between sugar residues in the O-antigen. One of the genes appears to be a repressor, while the remaining genes are unidentified. These data suggest that the major component of the O-antigen is perosamine and that a number of different linkages are made between the perosamine residues.
Diffractive Vector Meson Production at HERA: from Soft to Hard QCD
Creators: name: Ivanov, I. P.
name: Nikolaev, N. N.
name: Savin, A. A.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Experimental results from HERA on diffractive vector meson production and their theoretical interpretation within microscopic QCD are reviewed with an emphasis on the BFKL color dipole and kt-factorization approaches.
description: 178 pages including 78 figures
THE STRATEGIC ROLE OF PUBLIC R&D IN AGRICULTURE
Creators: name: Onofri, Alejandro
name: Giannakas, Konstantinos
name: Onofri, Alejandro
name: Giannakas, Konstantinos
Publisher: name: Unknown
Year: 2001
Subjects: Research and Development/Tech Change/Emerging Technologies

description: The role of public agricultural R&D is analyzed in a mixed oligopoly model framework with strategic interaction among innovating firms and the government. Selective subsidization of innovating firms (i.e., targeted subsidies) is also examined. Analytical results show that the existence of public applied research can enhance the arrival rate of innovations while mitigating the socially undesirable consequences of market power in applied R&D production. Under certain conditions, direct government involvement in applied R&D is equivalent to the provision of targeted subsidies to less efficient firms.
GRILICHES' K-SHIFT AND COMPETITIVENESS: COMMODITY PROGRESS IN US AGRICULTURE
Creators: name: Fulginiti, Lilyan E.
name: Fulginiti, Lilyan E.
Publisher: name: Unknown
Year: 2001
Subjects: subject: Marketing
subject: FOS: Economics and business

description: Competitiveness in commodity markets is associated with a shift in the marginal cost as represented by Griliches k-shift. A distance function is used to estimate this shift as a combination of the rate an bias of technological change in the markets for corn, soybenas, wheat, and beef in U.S agriculture.
Minimally coupled scalar fields as imperfect fluids
Creators: name: Gergely, Cecília
name: Keresztes, Zoltán
name: Gergely, László Árpád
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We revisit the issue of the fluid description of minimally coupled scalar fields. While in a cosmological setup the interpretation of a time-evolving scalar field as a perfect fluid is well-understood, the situation is more intricate when the scalar field is static, but has a spatial gradient, a situation motivated by black hole perturbations in scalar-tensor theories. Then the scalar field is interpreted as either a particular imperfect fluid of type I or a superposition of a pair of leftgoing (incoming) and rightgoing (outgoing) null dusts with a perfect fluid. Finally, when the scalar gradient is null, it is equivalent to an imperfect fluid of type II, degenerating into null dust when the energy conditions are imposed. We also propose the suitable action in terms of the fluid pressure components for each case and discuss the variational principle for a generic class of minimally coupled scalar fields.
description: 6 pages, to appear in Physical Review D
IMPACTS OF LAND RESDISTRIBUTION ON LAND MANAGEMENT AND PRODUCTIVITY IN THE ETHIOPIAN HIGHLANDS
Creators: name: Pender, John L.
name: Benin, Samuel
name: Pender, John L.
name: Benin, Samuel
Publisher: name: Unknown
Year: 2001
Subjects: Land Economics/Use

description: The increasing problem of landlessness in Ethiopia has put pressure on regional governments to redistribute land. In 1997 and 1998, a major land redistribution was undertaken in the Amhara region, reducing landlessness where implemented. While the impacts of such redistributions have been hotly debated, little empirical evidence exists concerning the actual impacts of this redistribution. We find that the recent land redistribution in Amhara has had a positive impact on land productivity, by increasing access to land of farmers who are more interested or able to use purchased inputs such as fertilizer and improved seeds. Our results, however, do not show much effect of the recent land redistribution or expectations of future redistribution on land improvement and management. Thus, to the extent that investment in land improvement are necessary for conservation purposes, it appears that the policy change to stop redistributions is unlikely to have a substantial impact on reducing land degradation in this region of Ethiopia.
OPERATION CONTROL OF RAILCAR FLOWS AT NON-PUBLIC RAILTRACK (КОНТРОЛЬ ВАГОНОПОТОКОВ НА ПУТИ НЕОБЩЕГО ПОЛЬЗОВАНИЯ)
Creators: name: Rakhmangulov, Aleksandr
name: Osintsev, Nikita
name: Baginova, Vera
Publisher: name: figshare
Year: 2020
Subjects: subject: 90507 Transport Engineering
subject: FOS: Civil engineering

description: Wagon turnover in industrial transportation system. Control on the basis of information technology.Оборот вагонов в промышленно-транспортной системе. Управление на основе информационных технологий.
DESIGNING GREEN PROGRAMS TO PROTECT ENVIRONMENTAL AMENITIES: A MECHANISM DESIGN APPROACH
Creators: name: Goodhue, Rachael E.
name: Gruere, Guillaume P.
name: Klonsky, Karen
name: Goodhue, Rachael E.
name: Gruere, Guillaume P.
name: Klonsky, Karen
Publisher: name: Unknown
Year: 2001
Subjects: Environmental Economics and Policy

description: We evaluate the optimal design of programs to encourage the production of environmental amenities in agriculture using a mechanism design approach.
Chiral transition and deconfinement in QCD
Creators: name: D'Elia, M.
name: Di Giacomo, A.
name: Pica, C.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: The study of QCD with two light dynamical fermions is of fundamental importance to understand the mechanism of color confinement. We present results of a numerical investigation on the order of the chiral phase transition with $N_f = 2$ by use of a novel strategy in finite size scaling analysis. We compare the critical behaviour of the specific heat, of the chiral susceptibility and of the equation of state with the possible critical behaviours. A second order transition in the O(4) and O(2) universality classes are excluded by our data and substantial evidence emerges for a first order transition. Like in most of previous works we have used the standard staggered action with $L_t = 4$: possible scaling violations and the need for further studies are discussed.
description: 6 pages, 9 figures, to appear in the proceedings of Computational Hadron Physics, Nicosia, 14-17 September 2005
Effect of Long-Term Debt on the Financial Growth of Non-Financial Firms Listed at the Nairobi Securities Exchange
Creators: name: Shikumo, David Haritone
name: Oluoch, Oluoch
name: Wepukhulu, Joshua Matanda
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Finance (q-fin.GN)
subject: FOS: Economics and business

description: A significant number of the non-financial firms listed at Nairobi Securities Exchange (NSE) have been experiencing declining financial performance which deter investors from investing in such firms. The lenders are also not willing to lend to such firms. As such, the firms struggle to raise funds for their operations. Prudent financing decisions can lead to financial growth of the firm. The purpose of this study is to assess the effect of Long-term debt on the financial growth of Non-financial firms listed at Nairobi Securities Exchange. Financial firms were excluded because of their specific sector characteristics and stringent regulatory framework. The study is guided by Trade-Off Theory and Theory of Growth of the Firm. Explanatory research design was adopted. The population of the study comprised of 45 non-financial firms listed at the NSE for a period of ten years from 2008 to 2017. The study conducted both descriptive statistics analysis and panel data analysis. The result indicates that Long term debt explains 21.6% and 5.16% of variation in financial growth as measured by growth in earnings per share and growth in market capitalization respectively. Long term debt positively and significantly influences financial growth measured using both growth in earnings per share and growth in market capitalization. The study recommends that, the management of non-financial firms listed at Nairobi Securities Exchange to employ financing means that can improve the earnings per share, market capitalization and enhance the value of the firm for the benefit of its stakeholders.
description: 9 pages
Aligning spinning black holes and accretion discs
Creators: name: King, A. R.
name: Lubow, S. H.
name: Ogilvie, G. I.
name: Pringle, J. E.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We consider the alignment torque between a spinning black hole and an accretion disc whose angular momenta are misaligned. This situation must hold initially in almost all gas accretion events on to supermassive black holes, and may occur in binaries where the black hole receives a natal supernova kick. We show that the torque always acts to align the hole's spin with the total angular momentum without changing its magnitude. The torque acts dissipatively on the disc, reducing its angular momentum, and aligning it with the hole if and only if the angle theta between the angular momenta J_d of the disc and J_h of the hole satisfies the inequality cos theta > -J_d / 2 J_h. If this condition fails, which requires both theta > pi/2 and J_d < 2 J_h, the disc counteraligns.
description: MNRAS, in press
DEMAND FOR ORGANIC AND CONVENTIONAL FROZEN VEGETABLES
Creators: name: Glaser, Lewrene K.
name: Thompson, Gary D.
name: Glaser, Lewrene K.
name: Thompson, Gary D.
Publisher: name: Unknown
Year: 1999
Subjects: subject: Consumer/Household Economics
subject: Demand and Price Analysis
subject: organic foods
subject: frozen vegetables
subject: almost ideal demand system

description: In this paper, we examine retail sales of organic and conventional frozen vegetables (broccoli, green beans, green peas, and sweet corn) using supermarket scanner data. Descriptive analysis includes comparisons of sales volume, prices, and market shares. Price and expenditure elasticities are estimated using the almost ideal demands system (AIDS).
CAUSALITY BETWEEN TFP, R&D AND PRICES: UNCONDITIONAL AND CONDITIONAL LINEAR FEEDBACK
Creators: name: Shaik, Saleem
name: Shaik, Saleem
Publisher: name: Unknown
Year: 1999
Subjects: subject: Productivity Analysis
subject: Research Methods/ Statistical Methods
subject: Linear Feedback
subject: Causality
subject: Productivity
subject: R&D
subject: Prices

description: This paper estimates the unconditional and conditional linear dependence between exogenous supply (R&D), endogenous demand (prices) and TFP based on the linear feedback method. Unit root tests are performed for Nebraska agriculture sector data spread over 1936-94 time period. Results indicate the influence of both R&D and prices on productivity.
HOST COUNTRY WELFARE EFFECTS OF FOREIGN DIRECT INVESTMENT (FDI) AND IMPORTS: AN APPLICATION TO THE PROCESSED FOOD INDUSTRY
Creators: name: Yilmaz, Alper
name: Yilmaz, Alper
Publisher: name: Unknown
Year: 1999
Subjects: Financial Economics
International Development

description: In case of tariff-induced capital inflow, growth might be immiserizing, under certain assumptions for the host country. Higher levels of foreign direct investment (FDI) might be associated with higher wages and employment levels in a host country, justifying the forbearance of some countries to the immiserizing effects of FDI.
Noether Symmetry in Newtonian Dynamics and Cosmology
Creators: name: Guendelman, E. I.
name: Zamlung, E.
name: Benisty, D.
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: A new symmetry for Newtonian Dynamics is analyzed, this corresponds to going to an accelerated frame, which introduces a constant gravitational field into the system and subsequently. We consider the addition of a linear contribution to the gravitational potential \(ϕ\) which can be used to cancel the gravitational field induced by going to the accelerated from, the combination of these two operations produces then a symmetry. This symmetry leads then to a Noether current which is conserved. The conserved charges are analyzed in special cases. The charges may not be conserved if the Noether current produces flux at infinity, but such flux can be eliminated by going to the CM (center of mass) system in the case of an isolated system. In the CM frame the Noether charge vanishes, Then we study connection between the Cosmological Principle and the Newtonian Dynamics which was formulated via a symmetry (Benisty and Guendelman in Mod Phys Lett A 35:2050131, 2020) of this type, but without an action formulation. Homogeneous behavior for the coordinate system relevant to cosmology leads to a zero Noether current and the requirement of the Newtonian potential to be invariant under the symmetry in this case yields the Friedmann equations, which appear as a consistency condition for the symmetry.
description: version published in General Relativity and Gravitation, 17 pages
Η Παιχνιδοποίηση στη διδασκαλία/ εκμάθηση της ξένης γλώσσας
Creators: name: Ασκητή, Αμαλία Αποστόλου
Publisher: name: Aristotle University of Thessaloniki
Year: 2023
Subjects: Παιχνιδοποίηση
Ψηφιακές πλατφόρμες
Ξένη γλώσσα
Διδασκαλία/ εκμάθηση
Κίνητρο
Gamification
Digital platforms
Foreign language
Teaching and learning
Motivation

description: Η παρούσα διπλωματική εργασία αποτελεί μια βιβλιογραφική επισκόπηση όσο αναφορά τα παιδαγωγικά οφέλη της Παιχνιδοποίησης στη διδασκαλία/εκμάθηση της ξένης γλώσσας και πως οι εκπαιδευτικές ψηφιακές πλατφόρμες και τα Συστήματα Διαχείρισης Μάθησης (ΣΔΜ) επιτρέπουν να παιχνιδοποιηθεί η ξενόγλωσση τάξη. Ειδικότερα, γίνεται αναφορά στον ορισμό της Παιχνιδοποίησης, το Σοβαρό και ψηφιακό παιχνίδι, όπως επίσης και η μάθηση με παιχνίδι. Οι ψηφιακές πλατφόρμες πριν χρησιμοποιηθούν από τους μαθητές θα πρέπει να βασίζονται σε απαραίτητα κριτήρια, όπως: το κίνητρο, η ανατροφοδότηση, η ανάπτυξη γλωσσικών επικοινωνιακών δεξιοτήτων και η διαφάνεια. Στόχος της ερευνητικής αυτής εργασίας, είναι να παρουσιαστούν τα κατάλληλα χαρακτηριστικά Παιχνιδοποίησης τα οποία εμπεριέχονται στις εκπαιδευτικές πλατφόρμες και τα οφέλη που προσφέρουν όταν χρησιμοποιούνται για τη διδασκαλία/εκμάθηση της ξένης γλώσσας.
description: The purpose of this dissertation is to highlight the pedagogical benefits of Gamification in foreign language teaching/learning and the use of educational platforms that can be used in a gamified classroom. The criteria, such as: motivation, feedback, development of language communication skills and transparency must be evaluated in case the students to become digitally literate and acquire both general skills and knowledge as well as language communication skills.
VALUE OF SOIL TEST INFORMATION FOR CROP PRODUCTION
Creators: name: Lukin, Vladimir
name: Epplin, Francis M.
name: Lukin, Vladimir
name: Epplin, Francis M.
Publisher: name: Unknown
Year: 1999
Subjects: Crop Production/Industries
Land Economics/Use

description: This study was conducted to determine the value of independent and joint nitrogen and phosphorus soil tests. Generalized stochastic dominance was used to estimate the value of information. Combined information from both the nitrogen and phosphorus tests was substantially more valuable than the knowledge of only one of the tests.
Explainable renewable energy forecasting
Creators: name: Ασβεστόπουλος, Γεώργιος Βασιλείου
Publisher: name: Aristotle University of Thessaloniki
Year: 2023
Subjects: ΑΠΕ ( Ανεξάρτητες πηγές ενέργειας )
Πρόβλεψη χρονοσειρών
Νευρωνικά δίκτυα
RES ( Renewable energy sources)
Timeseries forecasting
Neural networks

description: This thesis explores the forecasting of solar and wind power output within Greece’s Re- newable Energy Sources (RES) framework. Numerous models, such as statistical models, neural networks, and transformers, have been thoroughly tested in a numerous of forecasting scenarios, revealing insights into their performance and the use cases for which they are best suited for. The study emphasizes the importance of forecast precision along with interpretable results to improve forecast interpretability for practical decision-making. The findings of this research have the potential to improve renewable energy integration and management since the accuracy levels of some of the models are at SOTA levels.
description: Η παρούσα έρευνα έχει ως ύψιστο στόχο την ανάπτυξη ικανών μοντέλων για την πρόβλεψη της συνολικής παραγωγής των ηλιακών μονάδων καθώς και των ανεμογεννητριών της Ελλάδας. Για την επίτευξη του στόχου αυτού αναπτύχθηκαν διαφόρων ειδών μοντέλα, από στατιστικά εώς νευρωνικά μοντέλα, τα οποία με τη σειρά τους προσαρμόστηκαν μέσω μιας μεθοδευμένης διαδικασίας ανεπάλληλων πειραμάτων σε διάφορα σενάρια πρόβλεψης ώστε να είναι ικανά να παρέχουν τα καλύτερα δυνατά αποτελέσματα. Επιπροσθέτως, δόθηκε ιδιαίτερη έμφαση και στην επεξήγηση των αποτελεσμάτων των μοντέλων, καθώς αυτό θα συνέβαλε ιδιαίτερα στο να τα κρίνει κατάλληλα προς χρήση από άτομα που κατέχουν καίριες θέσεις στην ενορχήστρωση της παραγωγής ηλεκτρικής ενέργειας στην Ελλάδα. Τα αποτελέσματα ορισμένων μοντέλων κατάφεραν ιδιαίτερα ενθαρρυντικά αποτελέσματα και είναι σίγουρο πως αυτή η έρευνα δύναται να αποτελέσει πυλώνα περαιτέρω ερευνών.
Ο ρόλος της αυτοεκτίμησης στη σχολική επίδοση κατά την εφηβεία
Creators: name: Αθανασιάδου, Ιωάννα Κωνσταντίνου
Publisher: name: Aristotle University of Thessaloniki
Year: 2023
Subjects: Αυτοεκτίμηση
Σχολική επίδοση
Εφηβεία
Self-esteem
School performance
Adolescence

description: Η παρούσα αφηγηματική ανασκόπηση, στοχεύει στη μελέτη της επίδρασης της αυτοεκτίμησης στη σχολική επίδοση των εφήβων. Για την επιλογή των κατάλληλων μελετών αξιοποιήθηκε η βάση δεδομένων της Google Scholar και καθορίστηκαν τα κριτήρια ένταξης και τα κριτήρια αποκλεισμού από την ανασκόπηση. Τα κριτήρια ένταξης όριζαν ότι οι κατάλληλες έρευνες θα πρέπει να έχουν γραφτεί στην Αγγλική γλώσσα, το δείγμα των μελετών να περιλαμβάνει περισσότερους από 100 συμμετέχοντες, οι οποίοι να διανύουν την εφηβική τους ηλικία, να υπάρχει δυνατότητα πρόσβασης στο πλήρες κείμενο της μελέτης και να μην έχει εφαρμοστεί παρέμβαση για την αύξηση της αυτοεκτίμησης των συμμετεχόντων. Η ηλεκτρονική έρευνα κατέληξε σε 16.700 καταγραφές, από τις οποίες επιλέχθηκαν οι δέκα δημοσιεύσεις, οι οποίες πληρούσαν τα απαιτούμενα κριτήρια. Οι συγκεκριμένες έρευνες έχουν δημοσιευθεί μεταξύ 1997 και 2020. Από τις δέκα δημοσιεύσεις, οι δύο κατέληξαν σε μέτρια συσχέτιση της αυτοεκτίμησης με την σχολική επίδοση, ενώ οι υπόλοιπες οχτώ κατέληξαν σε σημαντική θετική συσχέτιση. Σύμφωνα με τα αποτελέσματα των περισσότερων ερευνών, μπορούμε να συναγάγουμε οτι η υψηλότερη αυτοεκτίμηση στους εφήβους συσχετίζεται με υψηλότερη σχολική επίδοση.
description: This study aims to investigate the relationship between self-esteem and school results among adolescents. For the selection of the appropriate studies, the database «Google Scholar» was used,and the inclusion and exclusion criteria were determined. Inclusion criteria included that studies had to be written in English, the study sample had to be large, consisting of adolescents, and access to the full text of the study was required. The electronic search resulted in 16.700 papers, from which ten studies were selected that met the inclusion criteria. The specific papers were published between 1990 and 2020. From all publications, two suggested a moderate correlation and the remaining eight suggested a significant positive correlation. According to the results of the studies, we can conclude that the higher a student’s self-esteem, the higher their school performance.
THE EAST ASIAN CRISIS: A DYNAMIC COMPUTABLE GENERAL EQUILIBRIUM ANALYSIS
Creators: name: Ianchovichina, Elena
name: McDougall, Robert
name: Hertel, Thomas W.
name: Ianchovichina, Elena
name: McDougall, Robert
name: Hertel, Thomas W.
Publisher: name: Unknown
Year: 1999
Subjects: subject: Financial Economics
subject: Research Methods/ Statistical Methods
subject: Capital mobility
subject: adaptive expectations
subject: East Asian crisis

description: The paper proposes a new disequilibrium approach to modeling international capital mobility. Key to this approach are errors in investors' assessments of potential returns to capital -- such as those recently observed in Asia. We use the model to study dynamic adjustment of North American farm and food industries to a marginally deeper, longer crisis in East Asia.
Analysis of Popper's Experiment and its Realization
Creators: name: Qureshi, Tabish
Publisher: name: arXiv
Year: 2005
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: An experiment proposed by Karl Popper to test the standard interpretation of quantum mechanics was realized by Kim and Shih. We use a quantum mechanical calculation to analyze Popper's proposal, and find a surprising result for the location of the virtual slit. We also analyze Kim and Shih's experiment, and demonstrate that although it ingeniously overcomes the problem of temporal spreading of the wave-packet, it is inconclusive about Popper's test. We point out that another experiment which (unknowingly) implements Popper's test in a conclusive way, has actually been carried out. Its results are in contradiction with Popper's prediction, and agree with our analysis.
description: Published version
Accretion disk luminosity for black holes surrounded by dark matter
Creators: name: Boshkayev, Kuantay
name: Idrissov, Anuar
name: Luongo, Orlando
name: Malafarina, Daniele
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We consider the observational properties of a static black hole space-time immersed in a dark matter envelope. We thus investigate how the modifications to geometry, induced by the presence of dark matter affect the luminosity of the black hole's accretion disk. We show that the same disk's luminosity produced by a black hole in vacuum may be produced by a smaller black hole if surrounded by dark matter under certain conditions. In particular, we demonstrate that the luminosity of the disk is markedly altered by dark matter's presence, suggesting that mass estimation of distant super-massive black holes may be changed if they are immersed in dark matter. We argue that a similar effect holds in more realistic scenarios and we discuss about the refractive index related to dark matter lensing. Hence we show how this may help explain the observed luminosity of super-massive black holes in the early universe.
description: 9 pages, 9 figures
Ποντιακές εγκαταστάσεις στην περιοχή του Κιλκίς. Δημογραφικές εξελίξεις μετά την ανταλλαγή του Πληθυσμού
Creators: name: Αθανασόπουλος, Κωνσταντίνος Ευστρατίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2023
Subjects: Ποντιακές εγκαταστάσεις στο Κιλκίς
Δημογραφικές εξελίξεις μετά την ανταλλαγή πληθυσμού στο Κιλκίς
Πρόσφυγες στο Κιλκίς
Pontiac establishments in Kilkis
Demographic developments in Kilkis
Popular exchange in Kilkis area

description: Σκοπός της παρούσας εργασίας ήταν η μελέτη των ποντιακών εγκαταστάσεων στην περιοχή του Κιλκίς και οι δημογραφικές εξελίξεις μετά την ανταλλαγή πληθυσμού. Αρχικά ασχοληθήκαμε με μία ιστορική αναδρομή σχετική με την ευρύτερη περιοχή του Πόντου αλλά και του Κιλκίς, από την αρχαιότητα έως σήμερα. Ιδιαίτερη έμφαση δόθηκε στην περίοδο του Μακεδονικού Αγώνα αλλά και των Βαλκανικών πολέμων καθώς οδήγησαν στην καταστροφή της πόλης του του Κιλκίς. Στην συνέχεια παρουσιάσαμε αναλυτικά τις προσφυγικές ροές από τις περιοχές της Θράκης, της Μικράς Ασίας αλλά κυρίως του Πόντου και τις διάφορες φάσεις κατά τις οποίες αυτές συντελέστηκαν. Έπειτα έγινε εκτενής αναφορά στην πληθυσμιακή εξέλιξη της πόλης του Κιλκίς. Τέλος ένα θέμα το οποίο θίξαμε αφορά τον πολιτισμό, τα ήθη και τα έθιμα, την οικονομική δραστηριότητα των Κιλκισιωτών προσφύγων και διαπιστώσαμε πόσο ζωτικής σημασίας υπήρξε η έλευση των προσφύγων στην περιοχή του Κιλκίς.
description: The purpose of this work was the study of the Pontic establishments in the area of Kilkis and the demographic developments after the population exchange. Initially we dealt with a historical review related to the wider region of Pontus and Kilkis, from antiquity to the present days. Particular emphasis was placed on the period of the Macedonian Struggle and the Balkan Wars as they led to the destruction of the city of Kilkis. Then we presented in detail the refugee flows from the regions of Thrace, Asia Minor, but mainly Pontus and the various phases during which they took place. Then an extensive reference was made to the population evolution of the city of Kilkis. Finally, a topic that we touched on concerns the culture, the customs and the economic activity of the Kilkisian refugees and we found out how vital the arrival of the refugees was in the Kilkis region.
description: Σε συνεργασία με: Κοινωνικής Θεολογίας (Εθνικό και Καποδιστριακό Πανεπιστήμιο Αθηνών)
TRANSACTION COSTS, ECONOMIC INSTRUMENTS AND ENVIRONMENTAL POLICIES
Creators: name: Herath, Deepananda P.B.
name: Weersink, Alfons
name: Herath, Deepananda P.B.
name: Weersink, Alfons
Publisher: name: Unknown
Year: 1999
Subjects: subject: Environmental Economics and Policy
subject: Industrial Organization
subject: Transaction Costs
subject: Economic Instrument Selection

description: This study has attempted to distinguish the alternative forms of transaction costs referred to the environmental policy literature and to bring these transaction costs into a unified theory. The optimal choice of economic instrument between Pigouvian taxes and tradable permits is shown to depend on the level of transaction costs as opposed to the standard model where both emission taxes and permits are first best policies to achieve a level of emissions. It is demonstrated that inclusion of transaction costs decreases the socially optimal emission level as compared to the standard model. Instrument selection is affected by the functional specification for instrument costs for both firm and regulator level. Depending on the nature of these costs optimal economic instruments will be different.
Electronic properties of disordered corner-sharing tetrahedral lattices
Creators: name: Fazileh, F.
name: Chen, X.
name: Gooding, R. J.
name: Tabunshchyk, K. V.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: We have examined the behaviour of noninteracting electrons moving on a corner-sharing tetrahedral lattice into which we introduce a uniform (box) distribution, of width W, of random on-site energies. We have used both the relative localization length and the spectral rigidity to analyze the nature of the eigenstates, and have determined both the mobility edge trajectories as a function of W, and the critical disorder, Wc, beyond which all states are localized. We find (i) that the mobility edge trajectories (energies Ec vs. disorder W) are qualitatively different from those found for a simple cubic lattice, and (ii) that the spectral rigidity is scale invariant at Wc and thus provides a reliable method of estimating this quantity -- we find Wc/t=14.5. We discuss our results in the context of the metal-to-insulator transition undergone by LiAlyTi{2-y}O4 in a quantum site percolation model that also includes the above-mentioned Anderson disorder, and show that the effects produced by Anderson disorder are far less important than those produced by quantum site percolation, at least in the determination of the doping concentration at which the metal-to-insulator transition is predicted to occur.
Chiral Equivariant Cohomology I
Creators: name: Lian, Bong H.
name: Linshaw, Andrew R.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Differential Geometry (math.DG)
subject: Quantum Algebra (math.QA)
subject: FOS: Mathematics

description: We construct a new equivariant cohomology theory for a certain class of differential vertex algebras, which we call the chiral equivariant cohomology. A principal example of a differential vertex algebra in this class is the chiral de Rham complex of Malikov-Schechtman-Vaintrob of a manifold with a group action. The main idea in this paper is to synthesize the algebraic approach to classical equivariant cohomology due to H. Cartan, with the theory of differential vertex algebras, by using an appropriate notion of invariant theory. We also construct the vertex algebra analogues of the Mathai-Quillen isomorphism, the Weil and the Cartan models for equivariant cohomology, and the Chern-Weil map. We give interesting cohomology classes in the new theory that have no classical analogues.
description: 76 pages, final version, to appear in Advances in Mathematics
SIESTA: recent developments and applications
Creators: name: García, Alberto
name: Papior, Nick
name: Akhtar, Arsalan
name: Artacho, Emilio
name: Blum, Volker
name: Bosoni, Emanuele
name: Brandimarte, Pedro
name: Brandbyge, Mads
name: Cerdá, J. I.
name: Corsetti, Fabiano
name: Cuadrado, Ramón
name: Dikan, Vladimir
name: Ferrer, Jaime
name: Gale, Julian
name: García-Fernández, Pablo
name: García-Suárez, V. M.
name: García, Sandra
name: Huhs, Georg
name: Illera, Sergio
name: Korytár, Richard
name: Koval, Peter
name: Lebedeva, Irina
name: Lin, Lin
name: López-Tarifa, Pablo
name: Mayo, Sara G.
name: Mohr, Stephan
name: Ordejón, Pablo
name: Postnikov, Andrei
name: Pouillon, Yann
name: Pruneda, Miguel
name: Robles, Roberto
name: Sánchez-Portal, Daniel
name: Soler, Jose M.
name: Ullah, Rafi
name: Yu, Victor Wen-zhe
name: Junquera, Javier
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computational Physics (physics.comp-ph)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: A review of the present status, recent enhancements, and applicability of the SIESTA program is presented. Since its debut in the mid-nineties, SIESTA's flexibility, efficiency and free distribution has given advanced materials simulation capabilities to many groups worldwide. The core methodological scheme of SIESTA combines finite-support pseudo-atomic orbitals as basis sets, norm-conserving pseudopotentials, and a real-space grid for the representation of charge density and potentials and the computation of their associated matrix elements. Here we describe the more recent implementations on top of that core scheme, which include: full spin-orbit interaction, non-repeated and multiple-contact ballistic electron transport, DFT+U and hybrid functionals, time-dependent DFT, novel reduced-scaling solvers, density-functional perturbation theory, efficient Van der Waals non-local density functionals, and enhanced molecular-dynamics options. In addition, a substantial effort has been made in enhancing interoperability and interfacing with other codes and utilities, such as Wannier90 and the second-principles modelling it can be used for, an AiiDA plugin for workflow automatization, interface to Lua for steering SIESTA runs, and various postprocessing utilities. SIESTA has also been engaged in the Electronic Structure Library effort from its inception, which has allowed the sharing of various low level libraries, as well as data standards and support for them, in particular the PSML definition and library for transferable pseudopotentials, and the interface to the ELSI library of solvers. Code sharing is made easier by the new open-source licensing model of the program. This review also presents examples of application of the capabilities of the code, as well as a view of on-going and future developments.
description: 29 pages, 23 figures
Structure of fermion nodes and nodal cells
Creators: name: Mitas, Lubos
Publisher: name: arXiv
Year: 2006
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We study nodes of fermionic ground state wave functions. For 2D and higher we prove that spin-polarized, noninteracting fermions in a harmonic well have two nodal cells for arbitrary system size. The result extends to other noninteracting/mean-field models such as fermions on a sphere, in a periodic box or in Hartree-Fock atomic states. Spin-unpolarized noninteracting states have multiple nodal cells, however, interactions and many-body correlations generally relax the multiple cells to the minimal number of two. With some conditions, this is proved for interacting 2D and higher dimensions harmonic fermion systems of arbitrary size using the Bardeen-Cooper-Schrieffer variational wave function. Implications and extent of these results are briefly discussed.
description: 4 pages, 2 figures
Critical collapse of collisionless matter in spherical symmetry
Creators: name: Olabarrieta, Ignacio (Iñaki)
Publisher: name: University of British Columbia
Year: 2009

description: We perform a numerical study of the critical regime for the general relativistic collapse of collisionless matter in spherical symmetry. The evolution of the matter is given by the Vlasov equation (or Boltzmann equation) and the geometry by Einstein's equations. This system of coupled differential equations is solved using a particle-mesh (PM) method. This method approximates the distribution function which describes the matter in phase space with a set of particles moving along the characteristics of the Vlasov equation. The individual particles are allowed to have angular momentum different from zero but the total angular momentum has to be zero to retain spherical symmetry. In accord wih previous work by Rein, Rendall and Schaeffer, our results give some indications that the critical behaivour in this model is of Type I (the smallest black hole in each family has a finite mass). For the families of initial data that we have studied it seems that in the critical regime the solution is a static spacetime with non-zero radial momentum for the individual particles. We have also found evidence for scaling laws for the time that the critical solutions spend in the critical regime.
Estimacao Temporal da Deformacao entre Objectos utilizando uma Metodologia Fisica
Creators: name: Tavares, Joao Manuel R. S.
name: Pinho, Raquel R.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Graphics (cs.GR)
subject: Computational Geometry (cs.CG)
subject: FOS: Computer and information sciences

description: In this paper, it is presented a methodology to estimate the deformation involved between two objects attending to its physical properties. This methodology can be used, for example, in Computational Vision or Computer Graphics applications, and consists in physically modeling the objects, by means of the Finite Elements Method, establishing correspondences between some of its data points, by using Modal Matching, and finally, determining the displacement field, that is the intermediate shapes, through the resolution of the Lagrange Dynamic Equilibrium Equation. As in many of the possible applications of the methodology to present, it is necessary to quantify the existing deformation, as well as to estimate only the non rigid component of the involved global deformation. The solutions adopted to satisfy such intentions will be also presented.
description: INFOCOMP Journal of Computer Science. This paper has been withdrawn due to journal politics
ECONOMIC IMPACT OF THE DEPLETION OF THE OGALLALA AQUIFER: A CASE STUDY OF THE SOUTHERN HIGH PLAINS OF TEXAS
Creators: name: Terrell, Bonnie L.
name: Johnson, Phillip N.
name: Terrell, Bonnie L.
name: Johnson, Phillip N.
Publisher: name: Unknown
Year: 1999
Subjects: Resource /Energy Economics and Policy

description: Dynamic optimization and input-output models were used to estimate the impacts of depletion of the Ogallala aquifer in the Texas Southern High Plains. It was found that cropping patterns would shift toward water efficient crops and dryland production; and regional economic activity is likely to be adversely affected.
Absence of pre-classical solutions in Bianchi I loop quantum cosmology
Creators: name: Cartin, Daniel
name: Khanna, Gaurav
Publisher: name: arXiv
Year: 2005
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Loop quantum cosmology, the symmetry reduction of quantum geometry for the study of various cosmological situations, leads to a difference equation for its quantum evolution equation. To ensure that solutions of this equation act in the expected classical manner far from singularities, additional restrictions are imposed on the solution. In this paper, we consider the Bianchi I model, both the vacuum case and the addition of a cosmological constant, and show using generating function techniques that only the zero solution satisfies these constraints. This implies either that there are technical difficulties with the current method of quantizing the evolution equation, or else loop quantum gravity imposes strong restrictions on the physically allowed solutions.
description: 4 pages, no figures, version to appear in PRL
[Fragment of unfinished autobiography - Children's Hospital and Vancouver Units]
Creators: name: Johns, Ethel
Publisher: name: The University of British Columbia
Year: 2015

description: Fragment of Ethel Johns' unfinished autobiography, describing her experiences at The Children's Hospital of Winnipeg (1915-19), and then at Vancouver General Hospital and as coordinator of the newly established nursing programme at UBC (1919-25).
It is written as a brief topical outline rather than a complete memoir.