cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Fast Flavor Depolarization of Supernova Neutrinos
Creators: name: Bhattacharyya, Soumya
name: Dasgupta, Basudeb
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Flavor-dependent neutrino emission is critical to the evolution of a supernova and its neutrino signal. In the dense anisotropic interior of the star, neutrino-neutrino forward-scattering can lead to fast collective neutrino oscillations, which has striking consequences. We present a theory of fast flavor depolarization, explaining how neutrino flavor differences become smaller, i.e., depolarize, due to diffusion to smaller angular scales. We show that transverse relaxation determines the epoch of this irreversible depolarization. We give a method to compute the depolarized fluxes, presenting an explicit formula for simple initial conditions, which can be a crucial input for supernova theory and neutrino phenomenology.
description: 4+4+3 pages; 4+4 figures; v2:minor changes, references added, comments welcome; v3: approx. identical to published version with supplemental material with analytical and numerical details
282 ปี หนังสือสมุดไทยเรื่องนันโทปนันทสูตรคำหลวง: เอกสารมรดกความทรงจำแห่งโลกของประเทศไทย
Creators: name: จุไรรัตน์ ลักษณะศิริ
Publisher: name: คณะศิลปศาสตร์ มหาวิทยาลัยธรรมศาสตร์
Year: 2018
Subjects: นันโทปนันทสูตรคําหลวง
หนังสือสมุดไทย
เอกสารมรดกความทรงจำแห่งโลกของประเทศไทย

description: วรรณวิทัศน์, 18, พฤศจิกายน, 1-31
A MERGE Model with Endogenous Technological Change and the Cost of Carbon Stabilization
Creators: name: Kypreos, Socrates
name: Kypreos, Socrates
Publisher: name: Unknown
Year: 2005
Subjects: Research and Development/Tech Change/Emerging Technologies

description: Two stylized backstop systems with endogenous technological learning formulations (ETL) are introduced in MERGE: one for the electric and the other for the non-electric markets. Then the model is applied to analyze the impacts of ETL on carbon-mitigation policy, contrasting the resulting impacts with the situation without learning. As the model considers endogenous technological change in the energy sector only some exogenous key parameters defining the production function are varied together with the assumed learning rates to check the robustness of our results. Based on model estimations and the sensitivity analyses we conclude that increased commitments for the development of new technologies to advance along their learning curves has a potential for substantial reductions in the cost of climate mitigation helping to reach safe concentrations of carbon in the atmosphere.
Optical Levitation of a Droplet under Linear Increase of Gravitational Acceleration
Creators: name: Kohira, Masahiro I.
name: Isomura, Akihiro
name: Magome, Nobuyuki
name: Mukai, Sadaatsu
name: Yoshikawa, Kenichi
Publisher: name: arXiv
Year: 2005
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Optical levitation of a liquid droplet in gas phase was investigated under timedependent change of the gravitational acceleration with specific flight pattern of an airplane. Through multiple trials under linear increase of effective gravitational acceleration, we performed the experiment of ptical trapping of a droplet from 0.3g_0 to 0.9g_0, where g_0 = 9.8 m/s^2. During such change of the effective gravitational acceleration, the trapping position on a droplet with the radius of 14 μm was found to be lowered by ca. 100 μm. The essential feature of the change of the trapping position is reproduced by a theoretical calculation under the framework of ray optics. As far as we know, the present study is the first report on optical levitation under time-dependent gravitational change.
Astrometric Binary Classification Via Artificial Neural Networks
Creators: name: Smith, Joe
Publisher: name: arXiv
Year: 2024
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
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: With nearly two billion stars observed and their corresponding astrometric parameters evaluated in the recent Gaia mission, the number of astrometric binary candidates have risen significantly. Due to the surplus of astrometric data, the current computational methods employed to inspect these astrometric binary candidates are both computationally expensive and cannot be executed in a reasonable time frame. In light of this, a machine learning (ML) technique to automatically classify whether a set of stars belong to an astrometric binary pair via an artificial neural network (ANN) is proposed. Using data from Gaia DR3, the ANN was trained and tested on 1.5 million highly probable true and visual binaries, considering the proper motions, parallaxes, and angular and physical separations as features. The ANN achieves high classification scores, with an accuracy of 99.3%, a precision rate of 0.988, a recall rate of 0.991, and an AUC of 0.999, indicating that the utilized ML technique is a highly effective method for classifying astrometric binaries. Thus, the proposed ANN is a promising alternative to the existing methods for the classification of astrometric binaries.
description: Accepted for publication in Astrophysical Journal (ApJ)
Hedging a Government Entitlement: The Case of Countercyclical Payments
Creators: name: Anderson, John D.
name: Coble, Keith H.
name: Miller, J. Corey
name: Anderson, John D.
name: Coble, Keith H.
name: Miller, J. Corey
Publisher: name: Unknown
Year: 2007
Subjects: subject: Demand and Price Analysis
subject: Risk and Uncertainty
subject: countercyclical payment
subject: expected utility
subject: hedging
subject: policy
subject: risk

description: This research evaluates whether the introduction of countercyclical payments creates an incentive for program crop producers to hedge the expected government payment using futures and/or options. Results indicate that some level of countercyclical payment hedging is optimal for risk-averse decision makers. However, optimal hedge ratios depend on planting time expectations of marketing year average price as well as on what crop, if any, has been planted on countercyclical payment base acres. These results suggest that the ability to hedge may make these payments more decoupled but also illustrate the distortion of producer behavior induced by farm programs.
Observation of Three-dimensional Long-range Order in Smaller Ion Coulomb Crystals in an rf Trap
Creators: name: Mortensen, A.
name: Nielsen, E.
name: Matthey, T.
name: Drewsen, M.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: Three-dimensional long-range ordered structures in smaller and near-spherically symmetric Coulomb crystals of ^{40}Ca^+ ions confined in a linear rf Paul trap have been observed when the number of ions exceeds ~1000 ions. This result is unexpected from ground state molecular dynamics (MD) simulations, but found to be in agreement with MD simulations of metastable ion configurations. Previously, three-dimensional long-range ordered structures have only been reported in Penning traps in systems of ~50,000 ions or more.
description: 5 pages; 4 figures; to appear in Phys. Rev. Lett.; changed contents
Dynamic Interrelationships between the U.S. Agricultural Trade Balance and the Macroeconomy
Creators: name: Baek, Jungho
name: Koo, Won W.
name: Baek, Jungho
name: Koo, Won W.
Publisher: name: Unknown
Year: 2007
Subjects: subject: International Relations/Trade
subject: agricultural trade balance
subject: autoregressive distributed lag model
subject: exchange rate
subject: income
subject: macroeconomy
subject: money supply

description: The effects of the exchange rate and the income and money supply of the United States and its major trading partners on the U.S. agricultural trade balance are examined using an autoregressive distributed lag (ARDL) model. Results suggest that the exchange rate is the key determinant of the short-and long-run behavior of the trade balance. It is also found that the income and money supply in both the United States and the trading partners have significant impacts on U.S. agricultural trade in both the short and long run.
ดวงอาทิตย์กับดวงจันทร์ที่โคจรกันในกลบทสันสกฤต
Creators: name: นาวิน โบษกรนัฏ
Publisher: name: คณะศิลปศาสตร์ มหาวิทยาลัยธรรมศาสตร์
Year: 2018
Subjects: ดวงอาทิตย์
ดวงจันทร์
กลบทสันสกฤต
พระราม
พระกฤษณะ

description: วรรณวิทัศน์, 18, พฤศจิกายน, 32-56
Η Σημασία της Επιχειρηματικής Δικτύωσης Μέσω του Web 2.0 στην Επιχειρηματική Απόδοση στις Δημιουργικές Βιομηχανίες
Creators: name: Παπαδοπούλου, Ελένη Στεφάνου
Publisher: name: Aristotle University of Thessaloniki
Year: 2023
Subjects: Επιχειρηματική Δικτύωση
Δημιουργικές Βιομηχανίες
Ψηφιακά Εργαλεία
Business Networking
Creative Industries
Web 2.0

description: Η παρούσα εργασία επικεντρώνεται στην επιχειρηματική δικτύωση των δημιουργικών βιομηχανιών, λαμβάνοντας υπόψη τη σημασία της για τους επιχειρηματίες και τη σημασία του Web 2.0 στις δημιουργικές βιομηχανίες, χρησιμοποιώντας το θεωρητικό πλαίσιο ΤΟΕ. Επομένως, η ανάλυση κατηγοριοποιεί τους τεχνολογικούς, οργανωτικούς και περιβαλλοντικούς παράγοντες που σχετίζονται με την εν λόγω θεματική. Κύριος σκοπός της έρευνας είναι η αναζήτηση των παραγόντων εκείνων που επηρεάζουν την υιοθέτηση νέων τεχνολογιών στις δημιουργικές βιομηχανίες, στα πλαίσια του ΤΟΕ. Η μεθοδολογία που ακολουθήθηκε ήταν η ποσοτική έρευνα, με κύριο ερευνητικό εργαλείο τα ερωτηματολόγια, μέσω των οποίων συλλέχθηκαν τα δεδομένα. Η συλλογή δεδομένων διενεργήθηκε εντός δύο μηνών, από τον Απρίλιο έως τον Μάιο του 2023. Εν συνεχεία, τα δεδομένα επεξεργάστηκαν με το πρόγραμμα στατιστικής IBM SPSS Statistics 27. Μέσα από την ανάλυση των δεδομένων προέκυψαν τα παρακάτω ευρήματα. Σύμφωνα με τα ευρήματα, το συγκριτικό πλεονέκτημα, η συμβατότητα και η οργανωσιακή κουλτούρα μάθησης παρουσιάζουν στατιστικά σημαντική και ασθενής συσχέτιση με το βαθμό υιοθέτησης ψηφιακών εργαλείων για την επιχειρηματική δικτύωση των επιχειρήσεων στις δημιουργικές βιομηχανίες, σύμφωνα με τα αποτελέσματα της γραμμικής συσχέτισης κατά Pearson.
description: This paper focuses on business networking in the creative industries, considering its importance for entrepreneurs and the importance of Web 2.0 in the creative industries, using the TOE theoretical framework. Therefore, the analysis categorizes the technological, organizational and environmental factors related to this topic. The main purpose of the research is to search for those factors that influence the adoption of new technologies in the creative industries within the TOE context. The methodology followed was quantitative research, with questionnaires as the main research tool, through which data were collected. The data collection was carried out within two months, from April to May 2023. Subsequently, the data were processed using the IBM SPSS Statistics 27 statistical program. Through the analysis of the data, the following findings emerged. According to the findings, comparative advantage, compatibility and organizational learning culture show statistically significant and weak correlation with the degree of adoption of digital tools for business networking in creative industries, according to the results of Pearson's linear correlation
ประวัติศาสตร์วัฒนธรรมของ "ผู้ชายพ่ายรัก" จากเพลงคู่เลิศ-ศรีสุดา
Creators: name: วันชนะ ทองคำเภา
Publisher: name: คณะศิลปศาสตร์ มหาวิทยาลัยธรรมศาสตร์
Year: 2018
Subjects: เลิศ ประสมทรัพย์
ศรีสุดา รัชตะวรรณ
สุนทราภรณ์
วิกฤตของความเป็นชาย
ประวัติศาสตร์วัฒนธรรม

description: วรรณวิทัศน์, 18, พฤศจิกายน, 57-84
Spiers Memorial Lecture: How to do impactful research in artificial intelligence for chemistry and materials science
Creators: name: Cheng, Austin
name: Ser, Cher Tian
name: Skreta, Marta
name: Guzmán-Cordero, Andrés
name: Thiede, Luca
name: Burger, Andreas
name: Aldossary, Abdulrahman
name: Leong, Shi Xuan
name: Pablo-García, Sergio
name: Strieth-Kalthoff, Felix
name: Aspuru-Guzik, Alán
Publisher: name: arXiv
Year: 2024
Subjects: subject: Machine Learning (cs.LG)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Artificial Intelligence (cs.AI)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: Machine learning has been pervasively touching many fields of science. Chemistry and materials science are no exception. While machine learning has been making a great impact, it is still not reaching its full potential or maturity. In this perspective, we first outline current applications across a diversity of problems in chemistry. Then, we discuss how machine learning researchers view and approach problems in the field. Finally, we provide our considerations for maximizing impact when researching machine learning for chemistry.
Systematic study of highly asymmetric systems using pi0, h+-, phi production at PHENIX
Creators: name: Novitzky, Norbert
Publisher: name: Zenodo
Year: 2021
Subjects: qm17
phenix
small systems
hadron
π0
φ
p+al
p+au
d+au
3he+au
nuclear
modification
raa
forward-rapidity
mid-rapidity
backward-rapidity

description: Talk presented at the Quark Matter 2017 conference
The hadronization line in stringy matter
Creators: name: Biro, Tamas S.
name: Cleymans, Jean
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Using the equation of state of the string model with linear strings comes close to describing the lattice QCD results and offers an explanation for the E/N = 1 GeV hadronization condition found in phenomenological statistical model. The E/N = 6T relation is derived from the zero pressure condition and is a fairly general result. The baryochemical potential dependence of the hadron gas can be met if it is re-interpreted in the framework of an additive quark model.
description: LaTeX, 7 eps figures
Convolutional neural network and long short-term memory based reduced order surrogate for minimal turbulent channel flow
Creators: name: Nakamura, Taichi
name: Fukami, Kai
name: Hasegawa, Kazuto
name: Nabae, Yusuke
name: Fukagata, Koji
Publisher: name: arXiv
Year: 2020
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: We investigate the applicability of machine learning based reduced order model (ML-ROM) to three-dimensional complex flows. As an example, we consider a turbulent channel flow at the friction Reynolds number of $Re_τ=110$ in a minimum domain which can maintain coherent structures of turbulence. Training data set are prepared by direct numerical simulation (DNS). The present ML-ROM is constructed by combining a three-dimensional convolutional neural network autoencoder (CNN-AE) and a long short-term memory (LSTM). The CNN-AE works to map high-dimensional flow fields into a low-dimensional latent space. The LSTM is then utilized to predict a temporal evolution of the latent vectors obtained by the CNN-AE. The combination of CNN-AE and LSTM can represent the spatio-temporal high-dimensional dynamics of flow fields by only integrating the temporal evolution of the low-dimensional latent dynamics. The turbulent flow fields reproduced by the present ML-ROM show statistical agreement with the reference DNS data in time-ensemble sense, which can also be found through an orbit-based analysis. Influences of the population of vortical structures contained in the domain and the time interval used for temporal prediction on the ML- ROM performance are also investigated. The potential and limitation of the present ML-ROM for turbulence analysis are discussed at the end of our presentation.
Shell Filling and Trigonal Warping in Graphene Quantum Dots
Creators: name: Garreis, Rebekka
name: Knothe, Angelika
name: Tong, Chuyao
name: Eich, Marius
name: Gold, Carolin
name: Watanabe, Kenji
name: Taniguchi, Takashi
name: Fal'ko, Vladimir
name: Ihn, Thomas
name: Ensslin, Klaus
name: Kurzmann, Annika
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Transport measurements through a few-electron circular quantum dot in bilayer graphene display bunching of the conductance resonances in groups of four, eight and twelve. This is in accordance with the spin and valley degeneracies in bilayer graphene and an additional threefold 'minivalley degeneracy' caused by trigonal warping. For small electron numbers, implying a small dot size and a small displacement field, a two-dimensional s- and then a p-shell are successively filled with four and eight electrons, respectively. For electron numbers larger than twelve, as the dot size and the displacement field increase, the single-particle ground state evolves into a three-fold degenerate minivalley ground state. A transition between these regimes is observed in our measurements and can be described by band-structure calculations. Measurements in magnetic field confirm Hund's second rule for spin filling of the quantum dot levels, emphasizing the importance of exchange interaction effects.
description: 10 pages, 7 figures
Νανοδομικά χαρακτηριστικά λεπτών υμενίων πολυφασικού πυριτιδίου του ερβίου
Creators: name: Παρίκογλου, Στυλιανός Σπυρίδωνα
Publisher: name: Aristotle University of Thessaloniki
Year: 2023
Subjects: Πυριτίδιο του ερβίου
Υπόστρωμα Si(100)
Τετραγωνική και εξαγωνική δομή
Erbium silicide
Substrate Si(100)
Tetragonal and hexagonal structure

description: Ο σκοπός της παρούσας διπλωματικής εργασίας είναι η μελέτη των υμενίων που αναπτύχθηκαν σε υποστρώματα Si(100) με τη χρήση της ηλεκτρονικής μικροσκοπίας, όπου αποκάλυψαν την ύπαρξη δομικών φάσεων στο πυριτίδιο του ερβίου: μιας τετραγωνικής τύπου ThSi2 και δύο ορθορομβικών υπερδομών αυτής. Η ανάλυση αυτού του φαινομένου βασίστηκε σε δύο κυρίως άρθρα, που αναφέρονται λεπτομερώς παρακάτω. Αναφέρεται ακόμα, ο σχηματισμός μόνο της τετραγωνικής φάσης στα δείγματα της απλής εξάτμισης Er και ενός συνδυασμού και των δύο φάσεων στην περίπτωση της συνεξάτμισης Er και Si. Επίσης, αναλύεται ο επιταξιακός τρόπος ανάπτυξης της τετραγωνικής δομής, όπως και της εξαγωνικής, η οποία παρουσιάζει αρκετούς τρόπους επιταξίας ("multiple variant epitaxy"). Τέλος, μέσω αυτής της έρευνας πιθανολογείται ότι η ανάπτυξη του πυριτιδίου του ερβίου ευνοείται χημικά για το υπόστρωμα Si(100) και όχι μόνο για το (111) όπως ήταν γνωστό.
description: The purpose of this diploma thesis is the study of epitaxial layers developed on Si(100) substrates using electron microscopy, revealing the existence of structural phases in erbium silicide: a tetragonal phase of ThSi2 type and two orthorhombic superstructures of it. The analysis of this phenomenon is based on two main articles, which are detailed below. It is also reported that only the tetragonal phase formation occurs in samples of pure Er deposition, while a combination of both phases is observed in the case of Er and Si co-deposition. Additionally, the epitaxial growth mode of the tetragonal structure is analyzed, as well as that of the hexagonal structure, which exhibits several epitaxial modes (multiple variant epitaxy). Finally, through this research, it is suggested that the development of erbium silicide is chemically favored on the Si(100) substrate, not just on the (111) substrate as previously known.
beeFormer: Bridging the Gap Between Semantic and Interaction Similarity in Recommender Systems
Creators: name: Vančura, Vojtěch
name: Kordík, Pavel
name: Straka, Milan
Publisher: name: arXiv
Year: 2024
Subjects: subject: Information Retrieval (cs.IR)
subject: FOS: Computer and information sciences

description: Recommender systems often use text-side information to improve their predictions, especially in cold-start or zero-shot recommendation scenarios, where traditional collaborative filtering approaches cannot be used. Many approaches to text-mining side information for recommender systems have been proposed over recent years, with sentence Transformers being the most prominent one. However, these models are trained to predict semantic similarity without utilizing interaction data with hidden patterns specific to recommender systems. In this paper, we propose beeFormer, a framework for training sentence Transformer models with interaction data. We demonstrate that our models trained with beeFormer can transfer knowledge between datasets while outperforming not only semantic similarity sentence Transformers but also traditional collaborative filtering methods. We also show that training on multiple datasets from different domains accumulates knowledge in a single model, unlocking the possibility of training universal, domain-agnostic sentence Transformer models to mine text representations for recommender systems. We release the source code, trained models, and additional details allowing replication of our experiments at https://github.com/recombee/beeformer.
description: Accepted to RecSys 2024
How robust is the entanglement entropy-area relation?
Creators: name: Das, Saurya
name: Shankaranarayanan, S.
Publisher: name: arXiv
Year: 2005
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We revisit the problem of finding the entanglement entropy of a scalar field on a lattice by tracing over its degrees of freedom inside a sphere. It is known that this entropy satisfies the area law -- entropy proportional to the area of the sphere -- when the field is assumed to be in its ground state. We show that the area law continues to hold when the scalar field degrees of freedom are in generic coherent states and a class of squeezed states. However, when excited states are considered, the entropy scales as a lower power of the area. This suggests that for large horizons, the ground state entropy dominates, whereas entropy due to excited states gives power law corrections. We discuss possible implications of this result to black hole entropy.
description: 5 Pages, Revtex 4, 2 EPS Figures. Significant revisions. Conclusions modified. Version appeared in Phys. Rev. D. (Rapid Communications)
International Trade in Exhaustible Resources: A Cartel-Competitive Fringe Model
Creators: name: Karp, Larry S.
name: Tahvonen, Olli
name: Karp, Larry S.
name: Tahvonen, Olli
Publisher: name: Unknown
Year: 1995
Subjects: Industrial Organization
International Relations/Trade

description: We characterize the open-loop and the Markov perfect Stackelberg equilibria for a differential game in which a cartel and a fringe extract a nonrenewable resource. Both agents have stock dependent costs. The comparison of initial market shares, across different equilibria, depends on which firm has the cost advantage. The cartel's steady state market share is largest in the open loop equilibrium and smallest in the competitive equilibrium. The initial price may be larger in the Markov equilibria, so a decrease in market power may make the equilibrium appear less competitive. The benefit to cartelization increases with market share.
Market Integration and Efficiency in the Presence of Cross-border Trade Restrictions: Evidence from selected Maize Markets in Southern Africa
Creators: name: Mutambatsere, Emelly
name: Christy, Ralph D.
name: Mutambatsere, Emelly
name: Christy, Ralph D.
Publisher: name: Unknown
Year: 2008
Subjects: International Relations/Trade

description: This study evaluates the extent to which regional trade might be relied upon as a policy strategy in achieving food security in southern Africa. The logic is that if significant diversities exist in production expertise and capacities for countries within the region, in the presence of integrated marketing systems, free trade can improve both supply and trade efficiency. Two components of the debate are analyzed: revealed competitiveness in production and export of the main staple – maize; and for a selected set of major markets, the nature of market interactions within the current regional trade policy framework. The analyses employ mainly non-parametric assessments, including such measures as revealed comparative advantage, price difference and transfer costs trends, and cumulative distributions of arbitrage returns, supported by econometric measures of integration and efficiency including parity bounds analyses. Results indicate substantial regional bias in maize trade among southern African countries, although competitiveness in maize production is restricted to a few countries that possess the capacity to supply significant quantities. Price and transfer costs trends, as well as the parametric market integration and efficiency tests, frequently fail to reject the null hypothesis of ‘integration’ in a selected set of markets in close proximity, regardless of country location, suggesting fairly consistent price movements, tradability of commodities and/or contestability of such markets across borders. For those markets, however, efficiency appears weak, as trade often fails to exhaust arbitrage profits. Markets not linked through trade tend to have a higher frequency of efficiency, so that the lack of trade often is justified by the lack of positive arbitrage returns. In those cases, market segmentation appears driven more by restrictive transport costs than tariffs or taxes on cross-border trade. These results suggest that the dominant forms of inefficiency in the markets considered in this study are (1) insufficient arbitrage resulting from supply side constraints, and other non-cost trade restrictions and (2) restrictive transport costs. Border administered tariffs and other forms of taxes on imports seem to account for a relatively low proportion of transfer costs, and generally reduce arbitrage returns marginally. Therefore policy interventions addressing both food supply and access are necessary to ensure meaningful food security benefits from trade.
Διδασκαλία των ξένων γλωσσών στη Πρωτοβάθμια εκπαίδευση. Ο ρόλος των ΤΠΕ στην εκμάθηση των ξένων γλωσσών
Creators: name: Πατσιομίτη, Μαγδαληνή Θεοφάνη
Publisher: name: Aristotle University of Thessaloniki
Year: 2023
Subjects: ΤΠΕ και εκπαιδευτική διαδικασία
Ξένες γλώσσες
Πρωτοβάθμια Εκπαίδευση
ICT and educational process
Foreign languages
Preliminary Education

description: Τα τελευταία χρόνια οι νέες τεχνολογίες της πληροφορίας και της επικοινωνίας (Τ.Π.Ε.) έχουν διεισδύσει σε όλους τους τομείς της ανθρώπινης δραστηριότητας. Στον τομέα της εκπαίδευσης συναντάμε ολοένα και περισσότερο την τεχνολογία ως βασικό εργαλείο διδασκαλίας και εκμάθησης. Η τεχνολογία αποτελεί πλέον ένα βασικό βοήθημα για το μαθητή και τον εκπαιδευτικό. Το γνωστικό αντικείμενο των ξένων γλωσσών έχει εντάξει στο δυναμικό του την τεχνολογία ήδη από τη δεκαετία του ’60. Σήμερα, κυρίαρχο μέσο αποτελεί το διαδίκτυο, το οποίο προβάλει με πολυτροπικότητα κείμενα και πολυμέσα που συμβάλουν στην καλύτερη κατανόηση, προσφέροντας ταυτόχρονα εργαλεία τα οποία δίνουν την ευκαιρία στους μαθητές για πιο εύκολη, άμεση πρόσβαση, ευελιξία και δημιουργικότητα. Η παρούσα έρευνα σκοπεύει να παρουσιάσει το ρόλο που μπορούν να διαδραματίσουν οι Τ.Π.Ε. στη διδασκαλία των ξένων γλωσσών στα πλαίσια της πρωτοβάθμιας εκπαίδευσης. Στόχος είναι να δοθεί έμφαση τόσο στην ιδιωτική όσο και στη δημόσια εκπαίδευση ενώ παράλληλα προβάλλεται η θέση που λαμβάνουν οι Τ.Π.Ε στο ξενόγλωσσο μάθημα και οι απόψεις των ξενόγλωσσων εκπαιδευτικών Πρωτοβάθμιας εκπαίδευσης αναφορικά με την θετική επίδραση των ψηφιακών μέσων στην εκπαιδευτική διαδικασία.
description: In recent years, new information and communication technologies (ICT) have penetrated all areas of human activity. In the field of education we increasingly encounter technology as a key teaching and learning tool. Technology is now an essential aid for the student and the teacher. The subject of foreign languages has incorporated technology into its potential since the 60s. Today, the dominant medium is the internet, which multimodally displays texts and multimedia that contribute to a better understanding, offering at the same time tools that give students the opportunity for easier, direct access, flexibility and creativity. This research intends to present the role that ICT can play in the teaching of foreign languages in the context of primary education. The aim is to emphasize on both private and public education, while highlighting the position taken by ICT in the foreign language course and the opinions of foreign language teachers in preliminary education regarding the positive effect of digital media in the educational process.
Pharmacokinetics and conjugative metabolism of labetalol stereoisomers in pregnant sheep : a chiral drug case study in pregnancy
Creators: name: Doroudian, Ahmad
Publisher: name: University of British Columbia
Year: 2009

description: A chiral HPLC assay for the separation of the four stereoisomers of labetalol in biological fluids was developed. The limit of detection of the individual isomers was 0.15 ng (0.6 ng of injected racemic labetalol). In maternal plasma the concentration of the RR isomer was 25±12% higher than those of the SR, SS and RS isomers throughout the infusion and post infusion period. The RR isomer had the lowest steady-state clearance (50.93±4.64 mL/min/kg) and the longest half-life (5.60±0.86 h). Ofthe 280 mg of labetalol administered, 11.04±2.76 mg was excreted as unconjugated while 65.84±7.19 mg was excreted as glucuronide conjugate. Approximately 32% of the unconjugated labetalol was in the form of the RR isomer compared to 19% for the other isomers. In fetal plasma, the concentration of the RR isomer (24 ± 5 ng/mL at steady-state) was 50% higher than that ofthe SR (11.00±2.38 ng/mL), SS(13.02±3.04 ng/mL) and RS(12.05±2.85 ng/mL) isomers throughout the infusion and post-infusion period, while the concentration of the SR isomer was consistently lower over the same interval. The terminal elimination half-life (t)/2) and the mean residence time (MRT) ofthe RR isomer were 13.07 ± 4.02 h, and 17.19 ± 5.63 h, respectively. Labetalol fetal infusion studies were performed in four chronically instrumented pregnant ewes. In fetal plasma, the concentration of the RR isomer at steady-state was 51.22 ± 4.55 ng/mL, which was significantly higher than the other three isomers ([SR]- 30.33 ± 3.41 ng/mL, [SS]= 33.70 ± 3.22 ng/mL, [RS]=34.93 ± 2.75). The terminal elimination half-life (ti/2) of the RR isomer was 8.62 ± 2.85 li, which was significantly lower than that obtained following maternal infusion of labetalol. Ofthe 9,400 ug of labetalol administered, 73.79 ± 9.64 mg (0.80 + 0.10%) was excreted as unconjugated while 133.44 ± 25.20 mg (1.4%) was excreted as glucuronide. Pharmacokinetics, pharmacodynamics and conjugative metabolism of dilevalol were compared to those obtained previously for dilevalol from racemic labetalol infusion experiments . The results suggest that virtually all of the previously observed pharmacological effects of labetalol in non-pregnant sheep were elicited by dilevalol.
Ethanol, Mandates, and Drought: Insights from a Stochastic Equilibrium Model of the U.S. Corn Market
Creators: name: McPhail, Lihong Lu
name: Babcock, Bruce A.
name: McPhail, Lihong Lu
name: Babcock, Bruce A.
Publisher: name: Unknown
Year: 2008
Subjects: subject: Crop Production/Industries
subject: Demand and Price Analysis
subject: Political Economy
subject: Research and Development/Tech Change/Emerging Technologies
subject: EISA mandate
subject: ethanol
subject: price volatility of corn
subject: stochastic equilibrium

description: The outlook for U.S. corn markets is inextricably linked to what happens to the U.S. ethanol industry, which depends, in turn, on the level of government subsidies and mandates. We develop a stochastic partial equilibrium model to simulate outcomes for the corn market for the 2008/09 marketing year to gain insight into these linkages. The model includes five stochastic variables that are major contributors to corn price volatility: planted acreage, corn yield, export demand, gasoline prices, and capacity of the ethanol industry. Our results indicate that integration of gasoline and corn markets has increased corn price volatility and that the passage of the expanded ethanol mandates in the Energy Independence and Security Act (EISA) has had modest effects on corn prices. Model results indicate an expected average marketing year price of $4.97 per bushel and a price volatility of 17.5% without the 10 billion gallon EISA mandate but with maintenance of the $0.51-per-gallon tax credit. Imposition of the mandate increases the expected price by 7.1% and price volatility by 12.1%. The effects of the mandate are modest, as ethanol production would average 9.5 billion gallons without the mandate because of high gasoline prices. The mandate is binding with a probability of 37.8%, which indicates that an additional tax or subsidy will be needed to ensure that the mandate is met. High corn prices caused by drought can cause the mandate to bind. Fixing 2008 corn yields at extreme drought levels increases expected corn prices to $6.59 per bushel without a mandate and to $7.99 per bushel with the EISA mandate. An average additional subsidy of $0.73 per gallon of ethanol would be needed to ensure that the mandate is met in this drought scenario. Elimination of the current blenders tax credit would result in the mandate not being met in all cases. On average, a subsidy of $0.41 per gallon would ensure that ethanol production is at least 10 billion gallons in the 2008/09 marketing year.
Solving the Hele-Shaw flow using the Harrow-Hassidim-Lloyd algorithm on superconducting devices: A study of efficiency and challenges
Creators: name: Meena, Muralikrishnan Gopalakrishnan
name: Gottiparthi, Kalyana C.
name: Lietz, Justin G.
name: Georgiadou, Antigoni
name: Pérez, Eduardo Antonio Coello
Publisher: name: arXiv
Year: 2024
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The development of quantum processors capable of handling practical fluid flow problems represents a distant yet promising frontier. Recent strides in quantum algorithms, particularly linear solvers, have illuminated the path toward quantum solutions for classical fluid flow solvers. However, assessing the capability of these quantum linear systems algorithms (QLSAs) in solving ideal flow equations on real hardware is crucial for their future development in practical fluid flow applications. In this study, we examine the capability of a canonical QLSA, the Harrow-Hassidim-Lloyd (HHL) algorithm, in accurately solving the system of linear equations governing an idealized fluid flow problem, specifically the Hele-Shaw flow. Our investigation focuses on analyzing the accuracy and computational cost of the HHL solver. To gauge the stability and convergence of the solver, we conduct shots-based simulations on quantum simulators. Furthermore, we share insights gained from executing the HHL solver on superconducting quantum devices. To mitigate errors arising from qubit measurement, gate operations, and qubit decoherence inherent in quantum devices, we employ various error suppression and mitigation techniques. Our preliminary assessments serve as a foundational step towards enabling more complex quantum utility scale evaluation of using QLSA for solving fluid flow problems.
Intrusion of MeV-TeV Cosmic-Rays into Molecular Clouds Studied by Ionization, the Neutral Iron Line, and Gamma-Rays
Creators: name: Fujita, Yutaka
name: Nobukawa, Kumiko K.
name: Sano, Hidetoshi
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Low-energy (~MeV) cosmic rays (CRs) ionize molecular clouds and create the neutral iron line (Fe I Kα) at 6.4 keV. On the other hand, high-energy (>~ GeV) CRs interact with the dense cloud gas and produce gamma rays. Based on a one-dimensional model, we study the spatial correlation among ionization rates of gas, 6.4 keV line fluxes, and gamma-ray emissions from a molecular cloud illuminated by CRs accelerated at an adjacent supernova remnant. We find that the spatial distributions of these three observables depend on how CRs intrude the cloud and on the internal structure of the cloud. If the intrusion is represented by slow diffusion, the 6.4 keV line should be detected around the cloud edge where ionization rates are high. On the other hand, if CRs freely stream in the cloud, the 6.4 keV line should be observed where gamma rays are emitted. In the former, the cooling time of the CRs responsible for the 6.4 keV line is shorter than their cloud crossing time, and it is opposite in the latter. Although we compare the results with observations, we cannot conclude whether the diffusion or the free-streaming is dominantly realized. Our predictions can be checked in more detail with future X-ray missions such as XRISM and Athena and by observations of ionization rates that cover wider fields.
School-based SLT services using ICT (Zahir et al., 2021)
Creators: name: Zahir, Mariyam Z.
name: Miles, Anna
name: Hand, Linda
name: Ward, Elizabeth C.
Publisher: name: ASHA journals
Year: 2021
Subjects: subject: 200102 Communication Technology and Digital Media Studies
subject: FOS: Media and communications
subject: 200101 Communication Studies
subject: 111708 Health and Community Services
subject: FOS: Health sciences

description: Purpose: Access to speech-language therapy services for children with communication difficulties is limited in vulnerable countries within the Majority world, such as Small Island Developing States. The use of information and communication technology (ICT) has been identified as a possible solution to provide equitable access to services in Minority world countries. This study explored ICT-related conditions in remote schools of the Maldives, a Small Island Developing State, in order to identify potential service delivery approaches.Method: A mixed methods approach was used, involving (a) an online survey of 107 teachers, (b) observational data from four schools, (c) interviews with 31 teachers and the four principals of participating schools, and (d) 13 relevant online documents. Content analysis was used to analyze and integrate data from all sources.Results: Teachers’ access to ICT devices and fixed broadband Internet varied across schools. The government had limited funds to provide adequate fixed broadband Internet for them. However, favorable prospects were also discovered, including high access to 4G mobile broadband Internet in islands, high levels of confidence among teachers to use ICT, a variety of ICT uses currently employed by teachers, and the presence of financial aid for students with special education needs.Conclusions: The findings of the study support the potential for using mobile broadband Internet, available ICT devices, and teachers as agents of service delivery in remote schools to enhance speech-language therapy service delivery in the Maldives. The creation of relevant digital educational content for teachers could further support children with communication difficulties in the country.
Supplemental Material S1. Teachers survey: sections related to this study.
Supplemental Material S2. Education and ICT milestones and actions in the Maldives.
Zahir, M. Z., Miles, A., Hand, L., & Ward, E. C. (2021). Information and communication technology in schools: Its contribution to equitable speech-language therapy services in an underserved small island developing state. Language, Speech, and Hearing Services in Schools. Advance online publication. https://doi.org/10.1044/2020_LSHSS-20-00100
ปัจจัยทางการตลาดที่มีอิทธิพลต่อการซื้อเสื้อคู่รักในตลาดออนไลน์ ของประชาชนในเขตกรุงเทพมหานคร
Creators: name: กุลยา เมืองศรี และ ถนอมพงษ์ พานิช
Publisher: name: มหาวิทยาลัยรังสิต
Year: 2015
Subjects: ปัจจัยทางการตลาด, เสื้อคู่รัก, ตลาดออนไลน์

description: 1, 1, วารสารรังสิตบัณฑิตศึกษาในกลุ่มธุรกิจและสังคมศาสตร์
Space-Time Evolution of Hadronization in DIS: Semi-Exclusive Processes and Grey Track Production
Creators: name: Atti, Claudio Ciofi degli
Publisher: name: arXiv
Year: 2005
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Semi-exclusive processes and grey track production in DIS off nuclear targets are analyzed as possible tools to investigate the space time evolution of hadronization.
description: 8 pages, 4 figures, talk given at the Workshop on "In-Medium Hadron Physics", Giessen, Nov. 11-13, 2004, to appear in Acta Physica Hungarica
Quantum Permutation Synchronization
Creators: name: Birdal, Tolga
name: Golyanik, Vladislav
name: Theobalt, Christian
name: Guibas, Leonidas
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Emerging Technologies (cs.ET)
subject: Machine Learning (cs.LG)
subject: Robotics (cs.RO)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: We present QuantumSync, the first quantum algorithm for solving a synchronization problem in the context of computer vision. In particular, we focus on permutation synchronization which involves solving a non-convex optimization problem in discrete variables. We start by formulating synchronization into a quadratic unconstrained binary optimization problem (QUBO). While such formulation respects the binary nature of the problem, ensuring that the result is a set of permutations requires extra care. Hence, we: (I) show how to insert permutation constraints into a QUBO problem and (ii) solve the constrained QUBO problem on the current generation of the adiabatic quantum computers D-Wave. Thanks to the quantum annealing, we guarantee global optimality with high probability while sampling the energy landscape to yield confidence estimates. Our proof-of-concepts realization on the adiabatic D-Wave computer demonstrates that quantum machines offer a promising way to solve the prevalent yet difficult synchronization problems.
description: 19 pages, 15 figures, 4 tables; web pages: https://vcai.mpi-inf.mpg.de/projects/QUANTUMSYNC/, https://quantumcomputervision.github.io/
อุตสาหกรรมเครื่องสำอางไทยภายใต้ระบบมาตรฐาน ASEAN Cosmetic GMP
Creators: name: คุณหญิง จารุวรรณ เมณฑกา, เกษม กสิโอฬาร และ พัชรี ตันติวิภาวิน
Publisher: name: มหาวิทยาลัยรังสิต
Year: 2015
Subjects: เครื่องสำอางไทย, ระบบมาตรฐาน ASEAN Cosmetic GMP

description: 1, 1, วารสารรังสิตบัณฑิตศึกษาในกลุ่มธุรกิจและสังคมศาสตร์
A Spatial Hedonic Model with Time-Varying Parameters: A New Method Using Flexible Least Squares
Creators: name: Kuethe, Todd H.
name: Foster, Kenneth A.
name: Florax, Raymond J.G.M.
name: Kuethe, Todd H.
name: Foster, Kenneth A.
name: Florax, Raymond J.G.M.
Publisher: name: Unknown
Year: 2008
Subjects: Demand and Price Analysis
Land Economics/Use
Livestock Production/Industries
Research Methods/ Statistical Methods

description: The following paper outlines a new econometric model designed to capture both the temporal and spatial dynamics of housing prices. The paper combines existing spatial econometric techniques with a model that allows parameters to evolve over time. In addition, we provide an empirical application to the price effects of confined animal feeding operations to a data set of residential real estate in Tippecanoe County, Indiana from 1993 through 2006.
State-independent quantum contextuality with projectors of nonunit rank
Creators: name: Xu, Zhen-Peng
name: Yu, Xiao-Dong
name: Kleinmann, Matthias
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Virtually all of the analysis of quantum contextuality is restricted to the case where events are represented by rank-one projectors. This restriction is arbitrary and not motivated by physical considerations. We show here that loosening the rank constraint opens a new realm of quantum contextuality and we demonstrate that state-independent contextuality can even require projectors of nonunit rank. This enables the possibility of state-independent contextuality with less than 13 projectors, which is the established minimum for the case of rank one. We prove that for any rank, at least 9 projectors are required. Furthermore, in an exhaustive numerical search we find that 13 projectors are also minimal for the cases where all projectors are uniformly of rank two or uniformly of rank three.
description: 9+9 pages, 4 figures. Published version
The Planting Real Option in Cash Rent Valuation
Creators: name: Du, Xiaodong
name: Hennessy, David A.
name: Du, Xiaodong
name: Hennessy, David A.
Publisher: name: Unknown
Year: 2008
Subjects: subject: Farm Management
subject: Research Methods/ Statistical Methods
subject: cash rent
subject: delta hedging
subject: Monte Carlo simulation
subject: multivariate GARCH
subject: real option
subject: Ricardian rent

description: After entering into farmland rental contracts in the fall, a tenant farmer has the planting flexibility to choose between corn and soybeans. Failure to account for this switching option will bias estimates of what farmers should pay to rent land. Applying contingent claims analysis methods, this study explicitly derives the real option value function. Comparative statics with respect to the volatilities of underlying state variables and their correlations are derived and discussed. Dynamic hedging deltas in this real option context are also developed. Monte Carlo simulation results show that the average cash rent valuation for the real option approach is 11% higher than that for the conventional net present value (NPV) method. The simulated dynamic hedging deltas are shown to differ from the ones implied by the NPV method.
ปัจจัยที่มีผลต่อการเกิดขึ้นของทีวีชุมชนในระบบดิจิตอล: ศึกษากรณีพะเยาทีวีชุมชน
Creators: name: สุภนันท์ ฤทธิ์มนตรี  และ นิธิดา แสงสิงแก้ว
Publisher: name: มหาวิทยาลัยรังสิต
Year: 2015
Subjects: ทีวีชุมชน, ทีวีดิจิตอล, สถานีโทรทัศน์บริการชุมชน

description: 1, 1, วารสารรังสิตบัณฑิตศึกษาในกลุ่มธุรกิจและสังคมศาสตร์
Multiplicity of investment equilibria when pollution permits are not tradable
Creators: name: Karp, Larry S.
name: Karp, Larry S.
Publisher: name: Unknown
Year: 2006
Subjects: subject: Environmental Economics and Policy
subject: tradable permits
subject: coordination games
subject: multiple equilibria
subject: global games

description: We study a model in which the level of environmental regulation depends on abatement costs, which depend on aggregate levels of investment in abatement capital. Firms are non-strategic. When emissions quotas are not tradable, there are multiple competitive equilibria to the investment problem. Allowing trade in permits leads to a unique socially optimal equilibrium. For a given distribution of investment, allowing trade in permits has an ambiguous effect on the optimal level of regulation. Previous results on coordination games with non-atomic agents are applied to the problem of environmental regulation with endogenous investment in abatement capital.