cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The formation of HD 149026 b
Creators: name: Broeg, C.
name: Wuchterl, G.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Today, many extrasolar planets have been detected. Some of them exhibit properties quite different from the planets in our solar system and they have eluded attempts to explain their formation. One such case is HD 149026 b. It was discovered by Sato et al. (2005) . A transit-determined orbital inclination results in a total mass of 114 earth masses. The unusually small radius can be explained by a condensible element core with an inferred mass of 67 earth masses for the best fitting theoretical model. In the core accretion model, giant planets are assumed to form around a growing core of condensible materials. With increasing core mass, the amount of gravitationally bound envelope mass increases. This continues up to the so-called critical core mass -- the largest core allowing a hydrostatic envelope. For larger cores, the lack of static solutions forces a dynamic evolution of the protoplanet in the process accreting large amounts of gas or ejecting the envelope. This would prevent the formation of HD 149026 b. By studying all possible hydrostatic equilibria we could show that HD 149026 b can remain hydrostatic up to the inferred heavy core. This is possible if it is formed in-situ in a relatively low-pressure nebula. This formation process is confirmed by fluid-dynamic calculations using the environmental conditions as determined by the hydrostatic models. We present a quantitative in-situ formation scenario for the massive core planet HD 149026 b. Furthermore we predict a wide range of possible core masses for close-in planets like HD 149026 b. This is different from migration where typical critical core masses should be expected.
description: 6 pages, 2 figures, letter MNRAS accepted 2007 Jan 9
Fine-grained classification of journal articles by relying on multiple layers of information through similarity network fusion: the case of the Cambridge Journal of Economics
Creators: name: Baccini, Alberto
name: Baccini, Federica
name: Barabesi, Lucio
name: Cioni, Martina
name: Petrovich, Eugenio
name: Pignalosa, Daria
Publisher: name: arXiv
Year: 2023
Subjects: subject: Digital Libraries (cs.DL)
subject: FOS: Computer and information sciences

description: In order to explore the suitability of a fine-grained classification of journal articles by exploiting multiple sources of information, articles are organized in a two-layer multiplex. The first layer conveys similarities based on the full-text of articles, and the second similarities based on cited references. The information of the two layers are only weakly associated. The Similarity Network Fusion process is adopted to combine the two layers into a new single-layer network. A clustering algorithm is applied to the fused network and the classification of articles is obtained. In order to evaluate its coherence, this classification is compared with the ones obtained by applying the same algorithm to each of two layers. Moreover, the classification obtained for the fused network is also compared with the classifications obtained when the layers of information are integrated using different methods available in literature. In the case of the Cambridge Journal of Economics, Similarity Network Fusion appears to be the best option. Moreover, the achieved classification appears to be fine-grained enough to represent the extreme heterogeneity characterizing the contributions published in the journal.
description: 35 pages, 4 figures, 10 tables
Οι επιδράσεις του περιβάλλοντος στις προγραμματισμένες και παρορμητικές αγορές:
Creators: name: Γκέγκα, Χρυσούλα Κωνσταντίνου
Publisher: name: Aristotle University of Thessaloniki
Year: 2010
Subjects: Περιβάλλον καταστήματος
Προγραμματισμένες αγορές
Παρορμητικές αγορές
Stove environment
Planned purchases
Impulse purchases

description: Η παρούσα μελέτη έχει ως στόχο να διερευνήσει ποιoι περιβαλλοντικοί παράγοντες ενός καταστήματος επηρεάζουν και σε τι βαθμό τόσο τις προγραμματισμένες όσο και τις απρογραμμάτιστες αγορές των καταναλωτών. Για την διεξαγωγή της έρευνας συντάχθηκε ένα ερωτηματολόγιο που μοιράστηκε σε ένα δείγμα 157 ατόμων. Στα δεδομένα που συλλέχθηκαν πραγματοποιήθηκε στατιστική ανάλυση, ώστε να βρεθούν οι σχέσεις μεταξύ των περιβαλλοντικών μεταβλητών ενός καταστήματος και των προγραμματισμένων/ παρορμητικών αγορών των καταναλωτών. Τα αποτελέσματα της έρευνας έδειξαν ότι οι παρορμητικές αγορές των καταναλωτών επηρεάζονται θετικά από την προτίμηση τους στη μουσική, τα θερμά χρώματα, την ευχάριστη μυρωδιά, καθώς και τις παρουσιάσεις μέσα στο κατάστημα και αρνητικά από τον συνωστισμό, ενώ δεν επηρεάζονται από την εξυπηρέτηση του προσωπικού και την επιτυχή διάταξη ενός καταστήματος. Όσον αφορά τις προγραμματισμένες αγορές των καταναλωτών διαπιστώθηκε ότι επηρεάζονται θετικά από τα ψυχρά χρώματα, αρνητικά από την δυσάρεστη μυρωδιά, τον συνωστισμό, την εξυπηρέτηση του προσωπικού και την ανεπιτυχή διάταξη ενός καταστήματος, ενώ δεν επηρεάζονται από τις παρουσιάσεις και την μη προτίμηση των καταναλωτών στη μουσική του καταστήματος. Τέλος, από την έρευνα επιπλέον προέκυψε ότι μόνο το φύλο και η ηλικία επηρεάζουν τις προγραμματισμένες αγορές των καταναλωτών όταν επιδρούν σε συνδυασμό με συγκεκριμένα στοιχεία του περιβάλλοντος, ενώ η ηλικία επηρεάζει αντίστοιχα και τις παρορμητικές αγορές.
description: This paper aims to investigate which environmental factors of a store influence both the planned and impulse purchases of consumers and to what extent. A questionnaire was drawn up for research purposes, which was distributed to a sample of 157 individuals. The data collected were statistically analyzed to find correlations between the environmental variables of the shopping environment and the planned/impulse purchases. The results showed that impulse purchases are positively influenced by consumers’ preference in music, warm colors, pleasant odors and in-store displays. They are negatively influenced, however, by crowding. The helpfulness of personnel and the successful layout of the store had no effect on impulse purchases, whatsoever. The research also revealed that planned purchases have a positive correlation to cool colors and a negative one to unpleasant odors, crowding, personnel service, and unsuccessful layout of the store. About planned purchases, statistics showed that consumers are not influenced by in-store displays or by their non-preference in music of the store. Finally, the survey established a strong correlation between the age and gender factors and planned purchases but that occurs in combination with certain elements of the shopping environment. Age influences respectively the impulse purchases as well.
Towards an algebraic method of solar cycle prediction II. Reducing the need for detailed input data with ARDoR
Creators: name: Nagy, Melinda
name: Petrovay, Kristóf
name: Lemerle, Alexandre
name: Charbonneau, Paul
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: An algebraic method for the reconstruction and potentially prediction of the solar dipole moment value at sunspot minimum (known to be a good predictor of the amplitude of the next solar cycle) was suggested in the first paper in this series. The method sums up the ultimate dipole moment contributions of individual active regions in a solar cycle: for this, detailed and reliable input data would in principle be needed for thousands of active regions in a solar cycle. To reduce the need for detailed input data, here we propose a new active region descriptor called ARDoR (Active Region Degree of Rogueness). In a detailed statistical analysis of a large number of activity cycles simulated with the 2$\times$2D dynamo model we demonstrate that ranking active regions by decreasing ARDoR, for a good reproduction of the solar dipole moment at the end of the cycle it is sufficient to consider the top $N$ regions on this list explicitly, where $N$ is a relatively low number, while for the other regions the ARDoR value may be set to zero. E.g., with $N=5$ the fraction of cycles where the dipole moment is reproduced with an error exceeding $\pm$30% is only 12%, significantly reduced with respect to the case $N=0$, i.e. ARDoR set to zero for all active regions, where this fraction is 26%. This indicates that stochastic effects on the intercycle variations of solar activity are dominated by the effect of a low number of large ``rogue'' active regions, rather than the combined effect of numerous small ARs. The method has a potential for future use in solar cycle prediction.
description: 15 pages, 2 tables, 4 figs. Accepted for publication in the Journal of Space Weather and Space Climate
Nutrition
Creators: name: อุบล ชื่นสำราญ
Publisher: name: วารสารวิจัย มสด สาขาวิทยาศาสตร์และเทคโนโลยี
Year: 2554
Subjects: Nutrition,Carbohydrate,Lipid,Protein

description: 1, 4, วารสารวิจัย มสด สาขาวิทยาศาสตร์และเทคโนโลยี
Surface Tension: Accelerated Expansion, Coincidence Problem & Hubble Tension
Creators: name: Ortiz, C.
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: In this paper we give a physical explanation to the accelerated expansion of the Universe, alleviating the tension between the discrepancy of Hubble constant measurements. By the Euler Cauchy stress principle, we identify a controversy on the lack of consideration of the surface forces contemplated in the study of the expansion of the Universe. We distinguish a new effect that modifies the spacetime fabric by means of the energy conservation equation. The resulting dynamical equations from the proposed hypothesis are contrasted to several testable astrophysical predictions. This paper also explains why we have not found any particle or fluid responsible for dark energy and clarifies the Cosmological Coincidence Problem. These explanations are achieved without assuming the existence of exotic matter of unphysical meaning or having to modify the Einstein's Field Equations.
description: 15 pages, 5 figures, IJMPD Accepted
Εκθεσιακός σχεδιασμός στο μουσείο του Λούβρου
Creators: name: Μπουζάκη, Αθηνά-Αντωνία Κωνσταντίνου-Διονυσίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2010
Subjects: Λούβρο
Εκθεσιακός σχεδιασμός
Μουσείο
Louvre
Exhibition design
Museum

description: Η παρούσα μεταπτυχιακή εργασία περιγράφει την διαδικασία του αρχιτεκτονικού σχεδιασμού των εκθέσεων στο τμήμα αρχιτεκτονικής, μουσειογραφίας και σήμανσης (service architecture, muséographie et signalétique) του μουσείου του Λούβρου. Η πορεία της εργασίας ξεκινάει με την περιγραφή του θεσμικού και διοικητικού πλαισίου του τμήματος και συνεχίζει με την περιγραφή του σχεδιασμού μιας συγκεκριμένης περιοδικής έκθεσης του μουσείου. Συγκεκριμένα, πρόκειται για την έκθεση Musées de papier, η οποία περιγράφεται μέσα από ένα χρονοδιάγραμμα ενεργειών και παράλληλων σχολίων από την συγγράφουσα. Ο σκοπός της εργασίας μέσω αυτών των βημάτων είναι να κάνει μια αποτίμηση της διαδικασίας του σχεδιασμού των εκθέσεων στο μουσείου Λούβρου. Εν κατακλείδι, Το μουσείο και συγκεκριμένα το τμήμα αρχιτεκτονικής (SAMS), έχει μια πολύ καλά δομημένη διοικητική οργάνωση και μια πολύ συγκεκριμένη διαδικασία ενεργειών για την παραγωγή μιας έκθεσης, γεγονός το οποίο προδιαγράφει την επιτυχία της κάθε έκθεσης.
description: The purpose of the present master of science thesis was to describe the process of exhibition design in the department of architecture, museography and signance (service architecture, muséographie et signalétique) in the Louvre museum. The problematic of the thesis began with the description of the institutional and administrative frame of the department and continued with the description of the designing process of a museum’s periodical exhibition. The study case was the exhibition Musées de papier, which was represented through a chronological narration and the parallel comments made by the author. The aim of the thesis via these steps was to make an assessment of the exhibition designing process at the Louvre museum. In conclusion, the museum and especially the department of architecture (SAMS), displays a very well structured administrative organisation and a very specific process of actions for the production of an exhibition, a fact which can ensure the success of each exhibition.
description: Σε συνεργασία με το Παιδαγωγικό Τμήμα Δημοτικής Εκπαίδευσης (Πανεπιστήμιο Δυτικής Μακεδονίας)
Optimal outcomes of nonlinear phonological intervention
Creators: name: Edwards, Susan Melinda
Publisher: name: University of British Columbia
Year: 2009

description: Efficacy research has been the focus of many phonological intervention projects recently (Bernhardt, 1990,1994; Von Bremen, 1990; Howell & Dean, 1995). The importance of conducting efficacy research is not in dispute; rather, researchers are focusing on how outcomes can be optimized in everyday clinical situations with typical clinicians given time and financial constraints (Fletcher, Fletcher & Wagner, 1988). The purpose of the present study was to optimize and evaluate the effectiveness of nonlinear phonological theory in typical clinical practise. Intervention took place in bi-weekly sessions over a period of 16 weeks. Data were collected to measure intermediate stages of generalization at six points and generalization to conversational speech was measured at three data points. Relative progress/overall gains in terms of Percent Consonant Correct (PCC) and Wordshape Match (WSM) were compared to subjects from Bernhardt (1990,1993a). Results are discussed in terms of nonlinear phonological theory and more recent developments in the area of constraint theory. Further discussion involves the interaction of phonetics and phonology, especially where physical limitations are concerned. Finally, the process of optimization is discussed in terms of effectiveness and research design. Suggestions for future phonology research based on everyday practise are provided.
On the Effect of Random Alternating Perturbations on Hazard Rates
Creators: name: Di Crescenzo, Antonio
name: Martinucci, Barbara
Publisher: name: arXiv
Year: 2007
Subjects: subject: Statistics Theory (math.ST)
subject: FOS: Mathematics
subject: 62N05

description: We consider a model for systems perturbed by dichotomous noise, in which the hazard rate function of a random lifetime is subject to additive time-alternating perturbations described by the telegraph process. This leads us to define a real-valued continuous-time stochastic process of alternating type expressed in terms of the integrated telegraph process for which we obtain the probability distribution, mean and variance. An application to survival analysis and reliability data sets based on confidence bands for estimated hazard rate functions is also provided.
description: 14 pages, 6 figures
Su ile USG
Creators: name: Erkman SANRI
Publisher: name: Zenodo
Year: 2018

description: Ultrasonun (USG) son yıllarda kullanımı; gerek gelişen teknoloji ile gerekse USG deneyiminin her geçen gün artmsı ile dikkat çekici bir şekilde yaygınlaşmaktadır. Acil servisler başta olmak üzere tıbbın birçok alanında USG kullanımı yaygınlaşmış ve hatta acil hasta yönetiminde USG, acil hekimlerinin olmazsa olmazı olmuştur. İlk olarak 20. yüzyılın ortalarında kullanılan USG cihazları açık su tankları teknolojisi ile kullanılmış. Daha çok savaş döneminde kullanılan bu teknoloji, içerisinde insanın/hastanın olduğu büyük su küvetlerinde iletkenin su olduğu bir mekanizma şeklinde tasarlanmış. Su ile USG ilerleyen yıllarda iletken madde olarak yerini önce yağa sonrasında ise günümüzde USG jeline bırakmıştır. USG jelinin kullanımı, özellikle probun geniş alanlarda kullanıldığı birçok vücut bölgesinde etkinliği kanıtlamıştır. Acil servislerde USG, mümkün olan en az miktarda jel kullanılarak, ve USG probunun jel üzerine ve aslında bir miktar da yaralanmış dokuya teması ile gerçekleşmektedir. Bu sebeple USG uygulaması esnasında özellikle distal ekstremite yaralanmaları değerlendirilirken hastada, prob teması sebebiyle bir miktar ağrı gelişebilmektedir. Bunun ötesinde, ideal bir değerlendirme yapmak için, mesela komşu iki parmak arası alanlar değerlendirilirken, parmaklara yeniden pozisyon vermek gerekebilmekte ve zaten ağrılı olan bu işlemde hastanın ağrısının daha da artmasına sebep olabilmektedir. Bu durum hastanın uygulama esnasındaki konfor ve memnuniyeti azaltabileceği gibi, görüntü yakalamayı ve dolayısıyla tanı sürecini de zorlaştırabilmektedir1.
Vector chirality and inhomogeneous magnetization in frustrated spin tubes in high magnetic fields
Creators: name: Sato, Masahiro
name: Sakai, Toru
Publisher: name: arXiv
Year: 2006
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The low-energy physics of three-leg frustrated antiferromagnetic spin-S tubes in the vicinity of the upper critical field are studied. Utilizing the effective field theory based on the spin-wave approximation, we argue that in the intermediate-interchain-coupling regime, the ground state exhibits a vector chiral order or an inhomogeneous magnetization for the interchain (rung) direction and the low-energy excitations are described by a one-component Tomonaga-Luttinger liquid (TLL). In both chiral and inhomogeneous phases, the Z_2 parity symmetry along the rung direction is spontaneously broken. It is also predicted that a two-component TLL appears and all the symmetries are restored in the strong-rung-coupling case.
description: 5 pages, 3 figures, Revtex, published version, see also cond-mat/0612165
Προτυποποίηση και βελτιστοποίηση αισθητήρων.
Creators: name: Τζιώτζης, Χρήστος Στέργιου
Publisher: name: Aristotle University of Thessaloniki
Year: 2010
Subjects: Προσομοίωση
Διάχυση
Νανοαισθητήρες
Simulation
DLA
Nanosensors

description: Σκοπός της εργασίας ήταν η μελέτη του λόγου επιφανείας προς όγκου προσομοιώσεων μοντέλου υλικού που αναπτύχθηκε με την διαδικασία της συσσωμάτωσης περιορισμένης από τη διάχυση (DLA) και της καταλληλότητας τέτοιων υλικών για εφαρμογές αισθητήρων. Έτσι αναπτύχθηκε λογισμικό που προσομοιώνει το φαινόμενο για 2 είδη θεωρώντας γειτονιές 8 ή 4 ατόμων και με παράμετρο την πιθανότητα προσκόλλησης. Έγιναν προσομοιώσεις για ντοπαρισμένους ημιαγωγούς με συγκέντρωση του δεύτερου είδους 1% και για νανοσύνθετα υλικά με συγκεντρώσεις δεύτερου είδους 20%, 30% και 50%. Και μετρήθηκε η διάσταση φράκταλ και ο λόγος επιφανείας όγκου. Αποδείχθηκε ότι οι προσομοιώσεις με 8 γείτονες έχουν τον καλύτερο λόγο επιφανείας όγκου και καλύτερη μορφολογία ώστε να είναι καταλληλότερες για αισθητήρες. Επιπλέον ενδιαφέρουσες δομές εμφανίστηκαν όταν η πιθανότητα προσκόλλησης για άτομα του ιδίου είδους είναι μεγάλη ενώ για άτομα διαφορετικού μικρή. Ο αριθμός των ατόμων σε όλες τις προσομοιώσεις ήταν 1000.
description: This thesis was developed in order to study the surface to volume ratio of materials developed by diffusion-limited aggregation (DLA) through a model simulation and whether those materials are appropriate for sensor applications. For that reason software was developed to simulate the phenomenon for two species and for two type of neighborhoods of 4 or 8 atoms. Also the sticking probability was inserted as a parameter. The simulations were carried out for doped semiconductors with 1% concentration of the second atom and for nanocomposites of 20%, 30% and 50% concentration for the second species. Simulations considering and 8 atom neighborhood proved to have better surface to volume ratio and better morphology thus making them more appropriate for sensor applications. Also the more interesting structures appeared when one considered high sticking probability for atoms of the same species and low for atom of different type. All simulations were carried out for 1000 atoms.
description: Σε συνεργασία με το Ινστιτούτο Τεχνολογίας Γκρενόμπλ (Γαλλία), το ΕΚΕΦΕ Δημόκριτος, και το CNRS (Centre National de la Researche Scientifique, Γαλλία)
Δειγματοληψία πολλαπλών πλαισίων:
Creators: name: Τζελαπτσής, Αθανάσιος Κωνσταντίνου
Publisher: name: Aristotle University of Thessaloniki
Year: 2010
Subjects: Πολλαπλά πλαίσια
Πολλαπλότητα
Εκτιμητές υλικού
Multiple frame
Multiplicity
Estimation of total

description: Στην παρούσα διπλωματική εργασία παρουσιάζονται διάφορες τεχνικές δειγματοληψίας πολλαπλών πλαισίων. Στο πρώτο κεφάλαιο δίνονται οι βασικοί ορισμοί των απλών πλαισίων, των πολλαπλών πλαισίων και της πολλαπλότητας. Στο δεύτερο δίνονται όλες οι βασικές εκτιμήτριες του ολικού του χαρακτηριστικού που μελετάμε όπως έχουν δοθεί από διάφορους ερευνητές καθώς και βασικές εκτιμήτριες της διασποράς. Στο τρίτο κεφάλαιο δίνονται οι βασικοί ορισμοί της πολλαπλότητας και στην συνέχεια επιχειρείται η σύνθεση της με τη δειγματοληψία πολλαπλών πλαισίων και δίνονται βασικοί εκτιμητές που έχουν προταθεί στη βιβλιογραφία. Στο τέταρτο κεφάλαιο έχουμε μια εναλλακτική μέθοδο δειγματοληψίας πολλαπλών πλαισίων την ολοκληρωμένη δειγματοληψία, όπου δίνονται κάποια θεωρήματα που μας εξασφαλίζουν την ίδια ακρίβεια ή και καλύτερη, στις εκτιμήσεις με ίδιο κόστος έρευνας με τη μέθοδο που περιγράφεται. Στο πέμπτο κεφάλαιο γίνεται σύνδεση της δειγματοληψίας πολλαπλών πλαισίων με άλλες γνωστές μεθόδους. Στο έκτο κεφάλαιο έχουμε μια εφαρμογή σε διαδικτυακές βάσεις δεδομένων και συγκεκριμένα σε Υπηρεσίες του ΑΠΘ. Τέλος στο παράρτημα δίνονται οι βασικές έννοιες της δειγματοληψίας και οι πιο γνωστές τεχνικές δειγματοληψίας.
description: This thesis presents various techniques in multiple frames sampling. The first chapter provides basic definitions of simple frames, multiple frames and multiplicity. In the second we study all basic estimators of the total as given by various researchers and basic estimator of variance. The third chapter provides basic definitions of multiplicity sampling (or network sampling) and then attempted the composition of the multiple sampling frames with it where main estimators proposed in the literature. In the fourth chapter we have an alternative method for multiple frame sampling the integrated sampling, which give some theorems which provide us with the same accuracy or better in our estimation with the same cost with this method. In the fifth chapter we present the association of multiple frame sampling with other known methods. In the sixth chapter we have an application of on-line databases and services specifically to the Auth. Finally in the appendix we present the basic concepts of sampling and the most popular sampling techniques.
Observable Gravitational Waves from Hyperkination in Palatini Gravity and Beyond
Creators: name: López, Samuel Sánchez
name: Dimopoulos, Konstantinos
name: Karam, Alexandros
name: Tomberg, Eemeli
Publisher: name: arXiv
Year: 2023
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We consider cosmology with an inflaton scalar field with an additional quartic kinetic term. Such a theory can be motivated by Palatini $R+R^2$ modified gravity. Assuming a runaway inflaton potential, we take the Universe to become dominated by the kinetic energy density of the scalar field after inflation. Initially, the leading kinetic term is quartic and we call the corresponding period hyperkination. Subsequently, the usual quadratic kinetic term takes over and we have regular kination, until reheating. We study, both analytically and numerically, the spectrum of primordial gravitational waves generated during inflation and re-entering the horizon during the subsequent eras. We demonstrate that the spectrum is flat for modes re-entering during radiation domination and hyperkination and linear in frequency for modes re-entering during kination: kinetic domination boosts the spectrum, but hyperkination truncates its peak. As a result, the effects of the kinetic period can be extended to observable frequencies without generating excessive gravitational waves, which could otherwise destabilise the process of Big Bang Nucleosynthesis. We show that there is ample parameter space for the primordial gravitational waves to be observable in the near future. If observed, the amplitude and `knee' of the spectrum will provide valuable insights into the background theory.
description: 23 pages, 7 figures, published version, license updated
Reduced Order Computational Folding from Lagrangian approach to origami vertex analysis: Kinematics
Creators: name: Grasinger, Matthew
name: Gillman, Andrew
name: Buskohl, Philip
Publisher: name: The Royal Society
Year: 2024
Subjects: classificationCode: 490109
subject: Theoretical and applied mechanics

description: Brief presentation of how the reduced order compatibility equations can be linearized and approximated numerically.
Εφαρμογή φυσικοχημικών μεθόδων ανάλυσης για τη μελέτη αρχαιολογικού υφάσματος
Creators: name: Κυρανούδη, Μαρία Σταύρου
Publisher: name: Aristotle University of Thessaloniki
Year: 2010
Subjects: Αρχαιολογικό ύφασμα
Ινες
Μικροσκοπία
Archaeological textiles
Fibers
Microscopy

description: Τα αρχαιολογικά υφάσματα ανήκουν σε μια κατηγορία υλικών, αυτών με οργανική προέλευση, που σπάνια διασώζονται σε ανασκαφικούς χώρους. Η ευαισθησία που αυτά παρουσιάζουν στην βιολογική προσβολή και οι φυσικοχημικές αλλοιώσεις που υφίστανται όταν βρίσκονται θαμμένα στο έδαφος, οδηγούν σε μια διαδικασία αποσύνθεσης με αποτέλεσμα την τελική απώλειά τους. Ωστόσο είναι δυνατή η διατήρησή τους όταν το μικροπεριβάλλον ταφής είναι ευνοϊκό.Παρά το μικρό συνήθως μέγεθός τους, οι πληροφορίες που μπορούν να δώσουν είναι πολλές και σχετίζονται με κατασκευαστικά στοιχεία των υφασμάτων όπως τα είδη των ινών, οι τρόποι κλώσης και ύφανσης των νημάτων, τα είδη των οργανικών χρωστικών και των τρόπων βαφής τους καθώς και με στοιχεία που αφορούν τις εμπορικές συναλλαγές, το κοινωνικο-οικονομικό καθεστώς και τις αισθητικές προτιμήσεις των διαφόρων ομάδων κατά την αρχαιότητα. Σκοπός της παρούσας εργασίας ήταν η άντληση μορφολογικών, κατασκευαστικών στοιχείων από δώδεκα συνολικά υφασμάτινα σπαράγματα που έχουν βρεθεί σε ανασκαφικούς χώρους της Μακεδονίας, και η συσχέτιση των στοιχείων αυτών για την εξαγωγή συμπερασμάτων που διευκολύνουν την αρχαιολογική έρευνα.Εφαρμόστηκαν στερεομικροσκοπική παρατήρηση, παρατήρηση σε οπτικό μικροσκόπιο διερχομένου φωτός και ηλεκτρονική μικροσκοπία σάρωσης σε συνδυασμό με φασματοσκοπία φθορισμού ακτίνων Χ διασποράς ενέργειας.Για τα περισσότερα δείγματα διευκρινίστηκαν το είδος της ίνας, η κατεύθυνση στρέψης και ο τρόπος ύφανσης των νημάτων. Φυτικές (βαμβάκι-λινό), ζωικές (μαλλί-μετάξι) καθώς και ανόργανες ίνες αμιάντου απαντώνται στα δείγματα. Και τα δύο είδη στρέψης εμφανίζονται να χρησιμοποιούνται στη Μακεδονία, ενώ ο προτιμώμενος τρόπος ύφανσης είναι ο απλός.
description: Archaeological textiles, as all organic materials, are hardly preserved in archaeological contexts due to biological attack and physicochemical alterations that occur before or during excavation. Deterioration depends on many factors, the most important being the nature of the fibers and the environment the material was kept in. When found, in spite their fragmentary condition, they are an important testimony to everyday life, farming and trade, migration of nations, art and technical culture of different ethnological groups. Stereomicroscopy, Transmission Optical Microscopy and Scanning Electron Microscopy- Energy Dispersive Spectroscopy applied on twelve textile fragments found in ancient Macedonian graves, for examine the condition of preservation, the nature of the fibers used, the spinning direction and the type of weave. Fibers of vegetable (cotton, flax) and animal (wool, silk) origin such as inorganic fibers (asbestos) appear in the samples. S and Z spinning was used for different fibers and the preferable type of weave is the plain weave.
Recurrent galactic cosmic-ray flux modulation in L1 and geomagnetic activity during the declining phase of the solar cycle 24
Creators: name: Grimani, Catia
name: Cesarini, Andrea
name: Fabi, Michele
name: Sabbatini, Federico
name: Telloni, Daniele
name: Villani, Mattia
Publisher: name: arXiv
Year: 2020
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Space Physics (physics.space-ph)
subject: FOS: Physical sciences

description: Galactic cosmic-ray (GCR) flux short-term variations ($$ 400 km s$^{-1}$ and/or the IP magnetic field intensity $>$ 10 nT. It is shown that the amplitude and evolution of individual modulations depend in a unique way on both IP plasma parameters and particle flux intensity before HSS and ICMEs transit. By comparing the LPF data with those gathered contemporaneously with the magnetic spectrometer experiment AMS-02 on board the International Space Station and with those of Earth polar neutron monitors, the GCR flux modulation was studied at different energies during recurrent short-term variations. It is also aimed to set the near real-time particle observation requirements to disentangle the role of long and short-term variations of the GCR flux to evaluate the performance of high-sensitivity instruments in space such as the future interferometers for gravitational wave detection. Finally, the association between recurrent GCR flux variation observations in L1 and weak to moderate geomagnetic activity in 2016-2017 is discussed. Short-term recurrent GCR flux variations are good proxies of recurrent geomagnetic activity when the B$_z$ component of the IP magnetic field is directed northern.
Black hole solutions of dimensionally reduced Einstein-Gauss-Bonnet gravity with a cosmological constant
Creators: name: Melis, M.
name: Mignemi, S.
Publisher: name: arXiv
Year: 2006
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We study the phase space of the spherically symmetric solutions of the system obtained from the dimensional reduction of the six-dimensional Einstein-Gauss-Bonnet action with a cosmological constant. We show that all the physical solutions have anti-de Sitter asymptotic behavior.
description: 13 pages, plain TeX
Invisible dark matter decays of a non-Standard Model like CP-even scalar boson
Creators: name: Binjonaid, Maien
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We investigate two extensions of the standard model that include particle dark matter candidates: the Next-to-Two Higgs Doublet Model and the Next-to-minimal Supersymmetric Standard Model. These models feature a non-Standard Model like CP-even scalar with a sub-TeV mass, denoted by $H_2$, among other particles. At a 13 TeV proton-proton collider, the primary production channel for such scalars is via the fusion of a pair of gluons. Subsequently, these scalars can decay invisibly into a pair of dark matter candidates, which can be dominant. In the supersymmetric model, it is possible for the Lightest Supersymmetric Particle (LSP) and Next-to Lightest Supersymmetric Particle (NLSP) to be mass degenerate, leading to quasi-invisible $H_2$ decays to LSP+NLSP and NLSP+NLSP. We present the predictions of both models for this challenging scenario while ensuring compatibility with recent experimental constraints.
description: Matches published version. The title and the number of words and references were changed to comply with journal rules. Results and conclusions are unchanged
Ουσιαστική και τυπική διάκριση των εξουσιών : θεωρητική προσέγγιση – πρακτικές αποχρώσεις:
Creators: name: Πολίτης, Νέστωρ Ανδρέα
Publisher: name: Aristotle University of Thessaloniki
Year: 2010
Subjects: Διάκριση εξουσιών
Νομοθετικές επεμβάσεις
Δεδικασμένο
Separation of powers
Legislative interventions
Precedent

description: Η συγκεκριμένη εργασία δεν έχει ως αντικείμενο κάποιο εξειδικευμένο κομμάτι από την θεωρία ή την πρακτική της αρχής της διάκρισης των εξουσιών. Κινείται σε γενικότερα θεωρητικά πλαίσια, προσπαθώντας να συλλάβει την συνολική λειτουργία της αρχής της διάκρισης (με έμφαση στην ουσιαστική) και να εντοπίσει τους κρίσιμους μηχανισμούς που δίνουν ζωή στους επιμέρους κανόνες της. Στο πρώτο μέρος της εργασίας («Θεωρητική προσέγγιση»), βασική επιδίωξη είναι να φανεί ότι η ουσιαστική διάσταση της αρχής της διάκρισης των εξουσιών αποτελεί το σημείο κλειδί για την ερμηνεία της, όντας εύπλαστη και ζωντανή απέναντι στον χρόνο και στην ιστορική εξέλιξη. Έτσι, γίνεται μια προσπάθεια προσέγγισης της (σημερινής) ουσίας των τριών λειτουργιών (νομοθετικής, εκτελεστικής, δικαστικής) ή, τουλάχιστον, της κατάλληλης μεθόδου προσέγγισης, παρουσιάζοντας παράλληλα τις βασικές σύγχρονες μεταμορφώσεις στο περιεχόμενό τους. Στο δεύτερο μέρος της εργασίας («Πρακτικές αποχρώσεις»), επιχειρείται η σύνδεση των παραπάνω με την πράξη. Αρχικά αναζητείται η σχέση της αρχής της διάκρισης των εξουσιών με την πρακτική του «δικαστικού αυτοπεριορισμού» και με την θεματική του «πειθαρχικού δικαίου» και αναλύεται ο αρνητικός (οριοθετικός) και ο θετικός (δημιουργικός) αντίστοιχα ρόλος που παίζει (ή που μπορεί να παίξει) η αρχή. Τέλος, στο βασικό ζήτημα των επεμβάσεων της νομοθετικής εξουσίας στα έργα της δικαστικής, υποστηρίζεται ο κεντρικός ρόλος που διαδραματίζει η αρχή της διάκρισης των εξουσιών, μέσω της στενής σχέσης που παρουσιάζουν τα νομολογιακά κριτήρια οριοθέτησης των επεμβάσεων με την ουσιαστική διάσταση της αρχής.
Exploring Text-transformers in AAAI 2021 Shared Task: COVID-19 Fake News Detection in English
Creators: name: Li, Xiangyang
name: Xia, Yu
name: Long, Xiang
name: Li, Zheng
name: Li, Sujian
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computation and Language (cs.CL)
subject: Artificial Intelligence (cs.AI)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: In this paper, we describe our system for the AAAI 2021 shared task of COVID-19 Fake News Detection in English, where we achieved the 3rd position with the weighted F1 score of 0.9859 on the test set. Specifically, we proposed an ensemble method of different pre-trained language models such as BERT, Roberta, Ernie, etc. with various training strategies including warm-up,learning rate schedule and k-fold cross-validation. We also conduct an extensive analysis of the samples that are not correctly classified. The code is available at:https://github.com/archersama/3rd-solution-COVID19-Fake-News-Detection-in-English.
description: 3rd solution of 'Constraint@AAAI2021 - COVID19 Fake News Detection in English'
GRB 050814 at z = 5.3 and the Redshift Distribution of Swift GRBs
Creators: name: Jakobsson, P.
name: Levan, A.
name: Fynbo, J. P. U.
name: Priddey, R.
name: Hjorth, J.
name: Tanvir, N.
name: Watson, D.
name: Jensen, B. L.
name: Sollerman, J.
name: Natarajan, P.
name: Gorosabel, J.
name: Cerón, J. M. Castro
name: Pedersen, K.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We report optical, near-infrared and X-ray observations of the afterglow of GRB 050814, which was seen to exhibit very red optical colours. By modelling its spectral energy distribution we find that z = 5.3 +/- 0.3. We next present a carefully selected sample of 19 Swift GRBs, intended to estimate in an unbiased way the GRB redshift distribution, including the mean redshift (z_mean) as well as constraints on the fraction of high-redshift bursts. We find that z_mean = 2.7 and that at least 5% of the GRBs originate at z > 5. The redshift distribution of the sample is qualitatively consistent with models where the GRB rate is proportional to the star formation rate in the Universe. The high mean redshift of this GRB sample and the wide redshift range clearly demonstrates the suitability of GRBs as efficient probes of galaxies and the intergalactic medium over a significant fraction of the history of the Universe.
description: 6 pages, 2 figures. To appear in the proceedings of the 16th Annual October Astrophysics Conference in Maryland "Gamma Ray Bursts in the Swift Era", eds. S. Holt, N. Gehrels & J. Nousek. A few references added. The GRB sample will be updated at http://www.astro.ku.dk/~pallja/GRBsample.html
Computation-Efficient Backscatter-Blessed MEC with User Reciprocity
Creators: name: Gu, Bowen
name: Xie, Hao
name: Li, Dong
Publisher: name: arXiv
Year: 2023
Subjects: subject: Information Theory (cs.IT)
subject: Signal Processing (eess.SP)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: This letter proposes a new user cooperative offloading protocol called user reciprocity in backscatter communication (BackCom)-aided mobile edge computing systems with efficient computation, whose quintessence is that each user can switch alternately between the active or the BackCom mode in different slots, and one user works in the active mode and the other user works in the BackCom mode in each time slot. In particular, the user in the BackCom mode can always use the signal transmitted by the user in the active mode for more data transmission in a spectrum-sharing manner. To evaluate the proposed protocol, a computation efficiency (CE) maximization-based optimization problem is formulated by jointly power control, time scheduling, reflection coefficient adjustment, and computing frequency allocation, while satisfying various physical constraints on the maximum energy budget, the computing frequency threshold, the minimum computed bits, and harvested energy threshold. To solve this non-convex problem, Dinkelbach's method and quadratic transform are first employed to transform the complex fractional forms into linear ones. Then, an iterative algorithm is designed by decomposing the resulting problem to obtain the suboptimal solution. The closed-form solutions for the transmit power, the RC, and the local computing frequency are provided for more insights. Besides, the analytical performance gain with the reciprocal mode is also derived. Simulation results demonstrate that the proposed scheme outperforms benchmark schemes regarding the CE.
ТАҒАМЛАРҒА  БАЙЛАНЫСЛЫ  СӨЗЛЕРДИӉ ЖАСАЛЫӮЫНЫӉ  МOРФOЛOГИЯЛЫҚ  УСЫЛЫ
Creators: name: Есбергенова, Рысгүл
Publisher: name: Zenodo
Year: 2024

description: Мақалада қарақалпақ тили менен түркмен тилиндеги тағам атамаларыныӊ жасалыӯындағы өзгешеликлер  көрсетилген.
Linearized physics and gravitational-waves polarizations in the Palatini formalism of GBD theory
Creators: name: Lu, Jianbo
name: Li, Jiachun
name: Guo, Hui
name: Zhuang, Zhitong
name: Zhao, Xin
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: A generalized Brans-Dicke (GBD) theory in the framework of Palatini formalism are proposed in this paper. We derive the field equations by using the variational approach and obtain the linearized equations by using the weak-field approximation method. We show various properties of the geometrical scalar field in the Palatini-formalism of GBD theory: it is massless and source-free, which are different from the results given in the metric-formalism of GBD theory. Also, we investigate the polarization modes of gravitational waves (GWs) by using the the geodesic deviation method and the Newman-Penrose method in the Palatini-GBD theory. It is observed that there are three polarizations modes and four oscillation in the Palatini-GBD theory. Concretely, they are the two transverse tensor ($+$) and ($\times$) standard polarization modes, and one breathing mode (with two oscillation). The results of GWs polarization in the Palatini-GBD theory are different from that in the metric-GBD theory, where there are four polarizations modes: the two standard tensorial modes ($+$ and $\times$), a scalar breathing mode, and a massive scalar mode that is a mix of the longitudinal and the breathing polarization. Comparing with the Palatini-$f(\tilde{R})$ theory and the General Relativity, we can see that the extra breathing mode of GWs polarization can be found in the Palatini-GBD theory. At last, the expression of the parameterized post Newton (PPN) parameter is derived, which could pass through the experimental test.
description: 12 pages, no figure
Comparing Classification Models on Kepler Data
Creators: name: Saha, Rohan
Publisher: name: arXiv
Year: 2021
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Machine Learning (cs.LG)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Even though the original Kepler mission ended due to mechanical failures, the Kepler satellite continues to collect data. Using classification models, we can understand the features exoplanets possess and then use those features to investigate further for any more information on the candidate planet. Based on the classification model, the idea is to find out the probability of the planet under observation being a candidate for an exoplanet or a false positive. If the model predicts that the observation is a candidate for being an exoplanet, then the further investigation can be conducted. From the model, we can narrow down the features that might explain the difference between a candidate and a false-positive which ultimately helps us to increase the efficiency of any model and fine-tune the model and ultimately the process of searching for any future exoplanets. The model comparison is supported by McNemar's test for checking significance.
Generalized Half-Dyon in SU(2) Yang-Mills-Higgs Theory
Creators: name: Wong, Guo-Quan
name: Wong, Khai-Ming
name: Zhu, Dan
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We report on generalized half-dyon solutions in SU(2) Yang-Mills-Higgs theory, namely Type I and Type II solutions. These solutions are constructed by considering $ϕ$-winding number $1\leq n \leq 4$, electric charge parameter $0 \leqη<η_{max}$ and Higgs self-coupling constant $0 \leq β\leq 1$. They represent system of magnetic charge $+2nπ/g$ ($-2nπ/g$) and electric charge $Q$ that lies along the negative (positive) $z$-axis. Fundamental properties such as total energy, electric charge, dipole moment are explored and discussed.
การวิเคราะห์ตัวแปรจำแนกอาจารย์คณะวิทยาศาสตร์และเทคโนโลยี มหาวิทยาลัยราชภัฏสวนดุสิต ในโครงการส่งเสริมการจัดกิจกรรมการเรียนรู้ที่เน้นผู้เรียนเป็นสำคัญ
Creators: name: จิตรี โพธิมามกะ
name: ภาณุพงศ์ พนมวัน
name: ฐิติพร ลินิฐฎา
Publisher: name: วารสารวิจัย มสด สาขาวิทยาศาสตร์และเทคโนโลยี
Year: 2553
Subjects: การจัดกิจกรรมการเรียนรู้ที่เน้นผู้เรียนเป็นสำคัญ,เจตคติต่อการเรียนรู้ที่เน้นผู้เรียนเป็นสำคัญ,แรงจูงใจ,ด้านผลลัพธ์ของการปฏิบัติงาน,แรงจูงใจด้านปัจจัยเกื้อกูล,การวิเคราะห์จำแนกประเภท

description: 1, 3, วารสารวิจัย มสด สาขาวิทยาศาสตร์และเทคโนโลยี
The Ministry of Social Services’ Community Development Workers’ Initiative : workers’ perception of their practice
Creators: name: Lawrie, Richard Singleton
Publisher: name: University of British Columbia
Year: 2009

description: The start-up of the Community Development Workers' Initiative (CDWI) aims at formally beginning the process of re-establishing community development practice within British Columbia's Ministry of Social Services (MSS). This report's goals are to document the MSS Community Development Workers1 (CDWs) perceptions of their practice, challenges, and successes both outside of and within the MSS. These goals are carried out within the context of organizational change theories and models. This research was conducted approximately one year after the start-up of the CDWI. This is an explorative/descriptive study which garners CDW input from questionnaires and face-to-face interviews. These two measures were utilized in order to yield qualitative data. Qualitative methods and Rothman's framework (three modes of community organization) are employed to extrapolate major themes. The findings reveal that most CDW respondents report their practice to reflect one or more of the three models described in Rothman's framework. Underlining this trend, the selection of community organizational strategies usually appears to be driven by a process involving the community and their identified needs and interests. Documentation and discussion also include CDWI community work constructs, the obstacles faced by the respondents, CDW's perceptions of MSS' s needs and interests, and the sampled CDW's recommendations surrounding organizational change through the use of a community development approach.
Quantum Simulations of SO(5) Many-Fermion Systems using Qudits
Creators: name: Illa, Marc
name: Robin, Caroline E. P.
name: Savage, Martin J.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Quantum Physics (quant-ph)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The structure and dynamics of quantum many-body systems are the result of a delicate interplay between underlying interactions, which leads to intricate entanglement structures. Despite this apparent complexity, symmetries emerge and have long been used to determine the relevant degrees of freedom and simplify classical descriptions of these systems. In this work, we explore the potential utility of quantum computers with arrays of qudits in simulating interacting fermionic systems, when the qudits can naturally map these relevant degrees of freedom. The Agassi model of fermions is based on an underlying $so(5)$ algebra, and the systems it describes can be partitioned into pairs of modes with five basis states, which naturally embed in arrays of $d=5$ qudits (qu5its). Classical noiseless simulations of the time evolution of systems of fermions embedded in up to twelve qu5its are performed using Google's cirq software. The resource requirements of the qu5it circuits are analyzed and compared with two different mappings to qubit systems, a physics-aware Jordan-Wigner mapping and a state-to-state mapping. We find advantages in using qudits, specifically in lowering the required quantum resources and reducing anticipated errors that take the simulation out of the physical space. A previously unrecognized sign problem has been identified from Trotterization errors in time evolving high-energy excitations. This has implications for quantum simulations in high-energy and nuclear physics, specifically of fragmentation and highly inelastic, multi-channel processes.
description: 34 pages, 21 figures
Neutrino Oscillations with Reactor Neutrinos
Creators: name: Cabrera, Anatael
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Prospect measurements of neutrino oscillations with reactor neutrinos are reviewed in this document. The following items are described: neutrinos oscillations status, reactor neutrino experimental strategy, impact of uncertainties on the neutrino oscillation sensitivity and, finally, the experiments in the field. This is the synthesis of the talk delivered during the NOW2006 conference at Otranto (Italy) during September 2006.
description: Plenary Talk. Proceedings of conference NOW06 to be published on Nucl Phys. B (Proc. Suppl.). 6 pages and 7 figures