cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Antarctica: A Southern Hemisphere Windpower Station?
Creators: name: Bolonkin, Alexander A.
name: Cathcart, Richard B.
Publisher: name: arXiv
Year: 2007
Subjects: subject: General Physics (physics.gen-ph)
subject: Atmospheric and Oceanic Physics (physics.ao-ph)
subject: FOS: Physical sciences

description: The International Polar Year commences in 2007. We offer a macroproject plan to generate a large amount of electricity on the continent of Antarctica by using sail-like wind dams incorporating air turbines. Electricity can be used to make exploration and exploitation efforts on Antarctica easier. We offer the technical specifications for the Fabric Aerial Dam and indicate some of the geographical facts underpinning our macro-engineering proposal.
description: 17 pages, 11 figures
The identification and characterisation of a new deltamethrin resistance-associatedgene, UBL40, in the diamondback moth, Plutella xylostella (L.)
Creators: name: Zhang, Hong
Publisher: name: figshare
Year: 2024
Subjects: classificationCode: 310505
subject: Gene expression (incl. microarray and other genome-wide approaches)
classificationCode: 300409
subject: Crop and pasture protection (incl. pests, diseases and weeds)

description: Differential expression of ubiquitin was previously reported between Plutella xylostella strains that are resistant or susceptible to the pesticide deltamethrin (DM). This finding hinted at the potential involvement of ubiquitin in deltamethrin resistance, a theory that demanded further testing. Real-time PCR analyses revealed that one of the ubiquitin genes, UBL40, was overexpressed in the deltamethrin-resistant strain during the fourth instar. To investigate the functional relationship between this gene and deltamethrin resistance, RNA interference (RNAi) and cell transfection were utilised. UBL40 knockdown was observed to significantly reduce the level of resistance in RNAi-treated larvae after 48 h. Conversely, overexpression of UBL40 in Drosophila Kc cells conferred a degree of protection against deltamethrin. These results represent the first evidence that UBL40 plays a role in the regulation of deltamethrin resistance in P. xylostella.
Infrared interferometric imaging of the compact dust disk around the AGB star HR3126 with the bipolar Toby Jug Nebula
Creators: name: Ohnaka, Keiichi
name: Schertl, Dieter
name: Hofmann, Karl-Heinz
name: Weigelt, Gerd
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The asymptotic giant branch (AGB) star HR3126, associated with the arcminute-scale bipolar Toby Jug Nebula, provides a rare opportunity to study the emergence of bipolar structures at the end of the AGB phase. We carried out long-baseline interferometric observations with AMBER and GRAVITY (2--2.45 micron) at the Very Large Telescope Interferometer, speckle interferometric observations with VLT/NACO (2.24 micron), and imaging with SPHERE-ZIMPOL (0.55 micron) and VISIR (7.9--19.5 micron). The images reconstructed in the continuum at 2.1--2.29 micron from the AMBER+GRAVITY data reveal the central star surrounded by an elliptical ring-like structure with a semimajor and semiminor axis of 5.3 and 3.5 mas, respectively. The ring is interpreted as the inner rim of an equatorial dust disk viewed from an inclination angle of ~50 degrees, and its axis is approximately aligned with the bipolar nebula. The disk is surprisingly compact, with an inner radius of a mere 3.5 Rstar (2 au). Our 2-D radiative transfer modeling shows that an optically thick flared disk with silicate grains as large as ~4 micron can reproduce the observed continuum images and the spectral energy distribution. The images obtained in the CO first overtone bands reveal elongated extended emission around the central star, suggesting the oblateness of the star's atmosphere or the presence of a CO gas disk inside the dust cavity. The object is unresolved with SPHERE-ZIMPOL, NACO, and VISIR. If the disk formed together with the bipolar nebula, the grain growth from sub-micron to a few microns should have taken place over the nebula's dynamical age of ~3900 yrs. The non-detection of a companion in the reconstructed images implies that either its 2.2 micron brightness is more than ~30 times lower than that of the red giant or it might have been shredded due to binary interaction.
description: 24 pages, 14 figures, published in Astronomy and Astrophysics
Η ιστορία των ιδεών και οι μαθησιακές δυσκολίες σε σχέση με τη δύναμη και την κίνηση ως οδηγός για τη διδακτική αξιοποίηση του λογισμικού interactive physics
Creators: name: Σολομωνίδου, Χριστίνα
name: Σταυρίδου, Ελένη
name: Χρηστίδης, Θ.
Publisher: name: Παιδαγωγική Επιθεώρηση
Year: 1997

description: This work consists of three parts. Ιn the first part we present an overview analysis of the main conceptions and learning difficulties that students of differ¬ent age hold about force and motion. In the second par there is an analysis of the historical evolution of pro-scientific and scientific ideas about force and motion from Aristotle to Newton. This historical analysis highlights the origin of the stu¬dents' pre-scientific ideas about force and motion and explains their resistance (luring science teaching in schools. In fact, the remediation of students' initial conceptions about force and motion requires a deep conceptual change from an Aristotelian to a Newtonian system of thought. The use of proper computer simulations of motions in the real and in alternative worlds may be of an important help in remediating students' conceptions. In the third part we present Inter¬active Physics II, powerful interactive software, which can provide science teachers and students with an important variety of situations of motion and rest simulations in the real and in alternative worlds. The question is which can be the most appropriate didactical use of this software in order to facilitate students' conceptual change. On the basis of our previous analysis, we propose a number of dynamic simulations of different bodies' motion and rest situations, which can facilitate students' conceptual change and can help them construct scientific ideas about force and motion.
description: Παιδαγωγική Επιθεώρηση, Vol. 26 (1997)
The six ways to build trust and reduce privacy concern in a Central Bank Digital Currency (CBDC)
Creators: name: Zarifis, Alex
name: Cheng, Xusen
Publisher: name: arXiv
Year: 2023
Subjects: subject: Human-Computer Interaction (cs.HC)
subject: Computers and Society (cs.CY)
subject: FOS: Computer and information sciences

description: Central Bank Digital Currencies (CBDCs) have been implemented by only a handful of countries, but they are being explored by many more. CBDCs are digital currencies issued and backed by a central bank. Consumer trust can encourage or discourage the adoption of this currency, which is also a payment system and a technology. This research attempts to understand consumer trust in CBDCs so that the development and adoption stages are more effective and satisfying for all the stakeholders.
Beyond Babel: BU Journal of Language, Literature and Humanities
Creators: name: Beyond Babel: BU Journal of Language, Literature and Humanities
Publisher: name: Beyond Babel: BU Journal of Language, Literature and Humanities
Year: 2024

description: Beyond Babel: BU Journal of Language, Literature and Humanities. A Publication of the Department of Languages and Literary Studies, Babcock University, Ilisan-Remo, Ogun State, Nigeria. The Journal is a prestigious academic publication that focuses on advancing research and scholarship in the field of of English and French Studies: Language and Linguistics, Applied Linguistics, Literatures and Cultures of the English-and French-speaking countries. The journal therefore provides a forum in which scholars working within any subfield of English and French studies can address a cross-section of the field. As a Bilingual/interdisciplinary journal. It serves as a platform for scholars, researchers, and practitioners from various disciplines within the humanities to share their innovative ideas, theories, and insights. The journal publishes  both online and in print with Direct Object Identifier (D.O.I)
Automated detection of microcalcifications in digitized mammogram film images
Creators: name: Nesbitt, Daniel
Publisher: name: University of British Columbia
Year: 2009

description: Breast cancer is a disease reaching epidemic proportions in North America with a lifetime incidence rate approaching 1 in 10 women. Microcalcifications are the most common and often the only radiological indicator of early breast cancer. Computer Aided Diagnosis (CADx) prompting techniques that alert radiologists to potential microcalcification abnormalities for re-examination have been demonstrated by several research groups to significantly improve the ability of radiologists to detect clustered microcalcifications. Very little research work has been performed to date to evaluate the performance of microcalcification detection techniques on a common set of images under controlled conditions. We have performed such a comparison on two promising methods from the research literature and four novel methods developed as a part of the work for this thesis. Additionally, the performance of these microcalcification detection methods are evaluated against criteria for the task of prompting screening radiologists for microcalcification cluster. As a part of this thesis work, an improved prototype of the Analytical Imaging Mammography (AIM) system was designed and constructed. This system is intended to provide a flexible platform for mammogram film digitization and analysis. Improvements in the ATM system included: (i) novel hardware and software for automatic, computerized focus and camera position control and (ii) a versatile, friendly user interface. The ATM system was used to digitize an extensive database of mammogram film images obtained from the B.C. Cancer Agency covering the full spectrum of mammographic abnormalities. A sub-set of 30 of these images were selected and used to evaluate the performance of the microcalcification detection methods implemented as a part of this thesis.
موسوعة: القاموس في الحرب والسلام.docx
Creators: name: Mounir, Ayman
Publisher: name: figshare
Year: 2024
Subjects: classificationCode: 369999
subject: Other creative arts and writing not elsewhere classified

description: صدر هذا الكتاب الموسوعي بعنوان» القاموس في الحرب والسلام« (منشورات PUF الفرنسية في حوالي 1600 صفحة تقريبا) بمشاركة مجموعة كبيرة من الباحثين والصحفيين والكتاب العسكريين والمدنيين وأساتذة الجامعات الذين قدموا تحليلاتهم وقراءاتهم عن دراسات واستراتيجيات الحرب والسلام. تم ترتيب هذه الموسوعة ترتيبا موضوعيا بحيث أصبح كل موضوع يمثل مدخلا مستقلا، وهو ما يصل بعدد المداخل إلى 300 مدخل بمشاركة أكثر من 200 كاتب وكاتبة.
AGN Triality of Triple Mergers: Multi-wavelength Classifications
Creators: name: Foord, Adi
name: Gultekin, Kayhan
name: Runnoe, Jessie C.
name: Koss, Michael J.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present results from a multi-wavelength analysis searching for multiple AGN systems in nearby (z<0.077) triple galaxy mergers. Combining archival Chandra, SDSS, WISE, and VLA observations, we quantify the rate of nearby triple AGN, as well as investigate possible connections between SMBH accretion and merger environments. Analyzing the multi-wavelength observations of 7 triple galaxy mergers, we find that 1 triple merger has a single AGN (NGC 3341); we discover, for the first time, 4 likely dual AGN (SDSS J1027+1749, SDSS J1631+2352, SDSS J1708+2153, and SDSS J2356-1016); we confirm one triple AGN system, SDSS J0849+1114; and 1 triple merger in our sample remains ambiguous (SDSS J0858+1822). Analyzing the WISE data, we find a trend of increasing N_H (associated with the primary AGN) as a function of increasing W1-W2 color, reflecting that the motions of gas and dust are coupled in merging environments, where large amount of both can be funneled into the active central region during mergers. Additionally, we find that the one triple AGN system in our sample has the highest levels of N_H and W1-W2 color, while the dual AGN candidates all have lower levels; these results are consistent with theoretical merger simulations that suggest higher levels of nuclear gas are more likely to activate AGN in mergers.
description: 19 pages, 3 figures, accepted to ApJ
Shell structure of $^{43}$S and collapse of the $N=28$ shell closure
Creators: name: Momiyama, S.
name: Wimmer, K.
name: Bazin, D.
name: Belarge, J.
name: Bender, P.
name: Elman, B.
name: Gade, A.
name: Kemper, K. W.
name: Kitamura, N.
name: Longfellow, B.
name: Lunderberg, E.
name: Niikura, M.
name: Ota, S.
name: Schrock, P.
name: Tostevin, J. A.
name: Weisshaar, D.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: The single-particle structure of the $N=27$ isotones provides insights into the shell evolution of neutron-rich nuclei from the doubly-magic $^{48}$Ca toward the drip line. $^{43}$S was studied employing the one-neutron knockout reaction from a radioactive $^{44}$S beam. Using a combination of prompt and delayed $γ$-ray spectroscopy the level structure of $^{43}$S was clarified. Momentum distributions were analyzed and allowed for spin and parity assignments. The deduced spectroscopic factors show that the $^{44}$S ground-state configuration has a strong intruder component. The results were confronted with shell model calculations using two effective interactions. General agreement was found between the calculations, but strong population of states originating from the removal of neutrons from the $2p_{3/2}$ orbital in the experiment indicates that the breakdown of the $N=28$ magic number is more rapid than the theoretical calculations suggest.
description: accepted for publication, Physical Review C
Private Corporates Green Accounting Reporting Practices - Perception And Awareness Among Employees
Creators: name: Ratchana Rajendran
name: Medhavi Shanker
name: Barik, Manisha
Publisher: name: figshare
Year: 2021
Subjects: subject: 150199 Accounting, Auditing and Accountability not elsewhere classified
subject: FOS: Economics and business
subject: 150106 Sustainability Accounting and Reporting

description: Green Accounting is a contemporary type of accounting system that factors environment costs into the financial statements of an organization. The major purpose of green accounting is to help businesses understand and manage the potential trade-off between traditional economics goals and environmental goals. The main objective of this study is to understand the need and importance of green accounting and to evaluate whether green accounting actually helps in benefiting the environment by analysing the perception and awareness level of green accounting among employees working in private corporations. The level of implementation of green accounting practice in private companies in an additional objective of the study. The primary data for the study was collected through a survey from the employees of private corporations using convenience sampling techniques. The independent variables age and gender were related with the awareness level, perception, time and cost involved in the implementation of green accounting practices. The survey was analysed using chi square and ANOVA tests. It was understood through the study that Green Accounting practices are a crucial tool to keep a check on the impact or cost of industries in the environment that it operates.
Smartphone Sensor-based Human Activity Recognition Robust to Different Sampling Rates
Creators: name: Hasegawa, Tatsuhito
Publisher: name: arXiv
Year: 2021
Subjects: subject: Human-Computer Interaction (cs.HC)
subject: FOS: Computer and information sciences

description: There is a research field of human activity recognition that automatically recognizes a user's physical activity through sensing technology incorporated in smartphones and other devices. When sensing daily activity, various measurement conditions, such as device type, possession method, wearing method, and measurement application, are often different depending on the user and the date of the measurement. Models that predict activity from sensor values are often implemented by machine learning and are trained using a large amount of activity-labeled sensor data measured from many users who provide labeled sensor data. However, collecting activity-labeled sensor data using each user's individual smartphones causes data being measured in inconsistent environments that may degrade the estimation accuracy of machine learning. In this study, I propose an activity recognition method that is robust to different sampling rates -- even in the measurement environment. The proposed method applies an adversarial network and data augmentation by downsampling to a common activity recognition model to achieve the acquisition of feature representations that make the sampling rate unspecifiable. Using the Human Activity Sensing Consortium (HASC), which is a dataset of basic activity recognition using smartphone sensors, I conducted an evaluation experiment to simulate an environment in which various sampling rates were measured. As a result, I found that estimation accuracy was reduced by the conventional method in the above environment and could be improved by my proposed method.
description: 12 pages, 12 figures, accepted for publication on IEEE Sensors Journal (2020)
An Experimental Study of Satisfaction Response: Evaluation of Online Collaborative Learning
Creators: name: Cheng, Xusen
name: Wang, Xueyin
name: Huang, Jianqing
name: Zarifis, Alex
Publisher: name: arXiv
Year: 2023
Subjects: subject: Human-Computer Interaction (cs.HC)
subject: FOS: Computer and information sciences

description: On the one hand, a growing amount of research discusses support for improving online collaborative learning quality, and many indicators are focused to assess its success. On the other hand, thinkLets for designing reputable and valuable collaborative processes have been developed for more than ten years. However, few studies try to apply thinkLets to online collaborative learning. This paper introduces thinkLets to online collaborative learning and experimentally tests its effectiveness with participants' responses on their satisfaction. Yield Shift Theory (YST), a causal theory explaining inner satisfaction, is adopted. In the experiment, 113 students from Universities in Beijing, China are chosen as a sample. They were divided into two groups, collaborating online in a simulated class. Then, YST in student groups under online collaborative learning is validated, a comparison study of online collaborative learning with and without thinkLets is implemented, and the satisfaction response of participants are analyzed. As a result of this comparison, YST is proved applicable in this context, and satisfaction is higher in online collaborative learning with thinkLets.
Most of the cool CGM of star-forming galaxies is not produced by supernova feedback
Creators: name: Afruni, Andrea
name: Fraternali, Filippo
name: Pezzulli, Gabriele
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The characterization of the large amount of gas residing in the galaxy halos, the so called circumgalactic medium (CGM), is crucial to understand galaxy evolution across cosmic time. We focus here on the the cool ($T\sim10^4$ K) phase of this medium around star-forming galaxies in the local universe, whose properties and dynamics are poorly understood. We developed semi-analytical parametric models to describe the cool CGM as an outflow of gas clouds from the central galaxy, as a result of supernova explosions in the disc (galactic wind). The cloud motion is driven by the galaxy gravitational pull and by the interactions with the hot ($T\sim10^6$ K) coronal gas. Through a bayesian analysis, we compare the predictions of our models with the data of the COS-Halos and COS-GASS surveys, which provide accurate kinematic information of the cool CGM around more than 40 low-redshift star-forming galaxies, probing distances up to the galaxy virial radii. Our findings clearly show that a supernova-driven outflow model is not suitable to describe the dynamics of the cool circumgalactic gas. Indeed, to reproduce the data, we need extreme scenarios, with initial outflow velocities and mass loading factors that would lead to unphysically high energy coupling from the supernovae to the gas and with supernova efficiencies largely exceeding unity. This strongly suggests that, since the outflows cannot reproduce most of the cool gas absorbers, the latter are likely the result of cosmological inflow in the outer galaxy halos, in analogy to what we have previously found for early-type galaxies.
description: Accepted for publication on MNRAS
Φιλοσοφικά, παιδαγωγικά και πρακτικά προβλήματα που σχετίζονται με την καθιέρωση και λειτουργία του ολοήμερου σχολείου
Creators: name: Περσιάνης, Παναγιώτης
Publisher: name: Παιδαγωγική Επιθεώρηση
Year: 1997

description: The paper argues that the patterns of "full-day" school implemented so far in Greece and Cyprus indicate that "full-day'' school can be either a mere extension of the time of attendance until four o' clock in the afternoon when working mothers return home, or an opportunity for a reconceptualization of the aims, the content and the organization of primary school. In the second case there arc some philosophical, pedagogical, and practical problems that ought to be dealt with before any re-conceptualization of the primary school lakes place. The major philosophical problems relate to the issues of authority and power, the parents', children's, and the civic authority's rights, equality of educational opportunity, and the concepts of school and teacher. The major pedagogical problem is that of the form teacher training ought to take, while the practical problems will mainly be the need for additional schoolν The paper refers to the innovative "full-day school" implemented in Greece under the name of KEDAM (Pupils Creative Occupation Centers) and underlines the three basic advantages of the project: a) the involvement of agents other than the state (municipalities, parents, and voluntary organizations), b) the flexibility of the school content and organization, and e) the emphasis on skills that the present children will need in the next century. These advantages are worth support from all those having an interest in education.
description: Παιδαγωγική Επιθεώρηση, Vol. 26 (1997)
Οι κυρίαρχες ιδεολογικές επιρροές στην ελληνική εκπαίδευση: το παράδειγμα της σχολικής ιστορίας
Creators: name: Μαυροσκούφης, Δημήτρης
Publisher: name: Παιδαγωγική Επιθεώρηση
Year: 1997

description: This study explores the ideological as well as political influences on the subject of History in the Greek secondary education and its specific role in the legitimation of power politics. Throughout this analysis particular emphasis is placed on state nationalism, Greek orthodoxy etc. with regard to the aims of History teaching from the 19th century until today. The overall outcome of the analysis points to the following: a) After the political reform of 19/4 a waveing of values is found out, which gives the school History a formal structure, the so-called "official History". b) From 1989-90 until now the traditional ideology seems to be gaining the lost ground. Old trends keep bobbing up and History is bound down by elder opinions and forms regarding its role and function in secondary education.
description: Παιδαγωγική Επιθεώρηση, Vol. 26 (1997)
Η αξιολόγηση του μαθητή: ανάδειξη διαφοροποιημένων σημασιοδοτήσεων της έννοιας
Creators: name: Λαμνίας, Κώστας
Publisher: name: Παιδαγωγική Επιθεώρηση
Year: 1997

description: This article aims to clarify the differentiations in the meaning of the concept of evaluation, when the context of the latter is: A. Different conceptual systems of the pedagogic field namely: 1. Empirical Pedagogy, 2. Interpretive Pedagogy and 3. Critical Pedagogy. B. The sociological theories and more specifically: 1. Functionalist Theory and 2. Conflict theory. At the same time the article identities the common elements of Functionalism and Empirical Pedagogy and their respective constructions of the meaning of evaluation. It is argued that it is these elements and the corresponding meanings which support a view of the practice of evaluation which is based on the criterion of the result attained. These also justify and legitimate a process of pupils- selection which is socially determined. It is also argued that to overcome the contradictions, which are created by the fragmentary use of the concept of evaluation at the level of school practices, the teachers need to become familiar with the different contexts within which the meaning of evaluation is created and transformed.
description: Παιδαγωγική Επιθεώρηση, Vol. 26 (1997)
Η αξιοποίηση της συνεργατικής μάθησης στη διαπολιτισμική εκπαίδευση
Creators: name: Παπάζογλου, Μαρία Αβραάμ
Publisher: name: Aristotle University of Thessaloniki
Year: 2015
Subjects: Διαπολιτισμική εκπαίδευση
Συνεργατική μάθηση
Πλουραλισμός
Intercultural education
Cooperative learning
Pluralism

description: Σκοπός αυτής της μεταπτυχιακής διατριβής ήταν η ανάδειξη της συνεργατικής μάθησης ως η καταλληλότερη διδακτική προσέγγιση στις σημερινές πολυπολιτισμικές σχολικές τάξεις, στο πλαίσιο της διαπολιτισμικής εκπαίδευσης. Στο πρώτο μέρος της εργασίας, πραγματοποιήσαμε μια εισαγωγή στη φιλοσοφία της διαπολιτισμικής εκπαίδευσης, όπου καταγράψαμε τον ορισμό της έννοιας, την πορεία εξέλιξης του παιδαγωγικού λόγου μέσω της αναφοράς στα πέντε μοντέλα διαχείρισης του πολιτισμικού πλουραλισμού στην εκπαίδευση και την ιστορική εξέλιξη της διαπολιτισμικής εκπαίδευσης στο διεθνή αλλά και ελληνικό χώρο. Στο δεύτερο μέρος της εργασίας, η προσοχή εστιάζεται στην έννοια της συνεργατικής μάθησης. Συγκεκριμένα, αναφερθήκαμε στα σημαντικότερα σημερινά δεδομένα σχετικά με την ποιότητα της εκπαίδευσης, στη σύνθεση των σημερινών σχολικών τάξεων και στη σημαντικότητα της συνεργατικής προσέγγισης στην εκπαίδευση. Έπειτα, ασχοληθήκαμε αναλυτικά με τη θεωρητική θεμελίωση της προτεινόμενης διδακτικής μεθόδου και, τέλος, μέσω της καταγραφής ερευνητικών δεδομένων, τεκμηριώσαμε την αποτελεσματικότητα της συνεργατικής μάθησης σε πολυπολιτισμικά σχολικά περιβάλλοντα σε τρεις καίριους τομείς: στον ακαδημαϊκό τομέα, στον τομέα των κοινωνικών σχέσεων και στον ατομικό τομέα.
description: The purpose of the present thesis was the emergence of cooperative learning as the most appropriate teaching approach in today's multicultural classrooms, in the context of intercultural education. In the first part of the work, we carried out an introduction to the philosophy of intercultural education, where we recorded the definition of the concept, the evolution of the pedagogical speech by reference to the five cultural pluralism management models in education and the historical development of intercultural education in international and Greek area. In the second part, the focus is on the concept of collaborative learning. In particular, we discussed the more important current data regarding the quality of education, the composition of today's classrooms and the importance of a cooperative approach to education. Furthermore, we dealt in detail with the theoretical foundation of the proposed teaching method and, finally, by recording research data, we documented the effectiveness of cooperative learning in multicultural school environments in three key areas: in the academic sector, in social relations and in the personal sector.
A Variable Flavour Number Scheme for Heavy Quark Production at Small x
Creators: name: White, C. D.
name: Thorne, R. S.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We define a new variable flavour number scheme for use in deep inelastic scattering, motivated by the need to consistently implement high energy resummations alongside a fixed order QCD expansion. We define the DIS(chi) scheme at fixed order, and show how to obtain the small x coefficient functions and heavy flavour matrix elements to leading order in the high energy resummation. We then implement these results in a global fit at LO which includes leading resummations with running coupling corrections. Finally, we address the impact of the resummed results on predictions for the longitudinal structure function. We find that they stabilise the behaviour of F_L at small x. Overall, we find that resummations significantly improve the fit to scattering data in the low x regime, although higher orders in the fixed order expansion are needed to describe current structure function and related data over the complete x range.
description: 40 pages, 16 figures
Supermatrix models and multi ZZ-brane partition functions in minimal superstring theories
Creators: name: Fukuma, Masafumi
name: Irie, Hirotaka
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study (p,q)=(2,4k) minimal superstrings within the minimal superstring field theory constructed in hep-th/0611045. We explicitly give a solution to the W_{1+\infty} constraints by using charged D-instanton operators, and show that the (m,n)-instanton sector with m positive-charged and n negative-charged ZZ-branes is described by an (m+n)\times (m+n) supermatrix model. We argue that the supermatrix model can be regarded as an open string field theory on the multi ZZ-brane system.
description: 15 pages, 1 figure, minor change
A short note on reconstruction variables in shock capturing schemes for magnetohydrodynamics
Creators: name: Miyoshi, Takahiro
name: Minoshima, Takashi
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: We propose a set of quick and easy approximate characteristic variables for higher-order reconstructions of shock capturing schemes for magnetohydrodynamics (MHD). Numerical experiments suggest that the reconstructions using the approximate characteristic variables are more robust than those using the conservative or primitive variables, while their computational efficiencies are comparable. The approximate characteristic variables are simple compared to the full characteristic variables for MHD, and can be a practical choice of reconstruction variables.
Δυσκολίες των μαθητών στην κατανόηση της πυκνότητας
Creators: name: Φασουλόπουλος, Γίωργος
name: Καριώτογλου, Πέτρος Π.
name: Κουμαράς, Παναγιώτης
name: Ψύλλος, Δημήτρης
Publisher: name: Παιδαγωγική Επιθεώρηση
Year: 1997

description: In this paper we investigate pupils views about the concept of density and particularly if pupils attribute to density, which is an intensive quantity, the features of an extensive one. For this purpose we have developed a valid and functional questionnaire, by interviewing a small number of pupils. This questionnaire has distributed to 152 pupils (13 - 14 yrs) and the results of the study partially verified our research hypothesis. One out of three pupils have views about density reach to the scientific ones. An other one out of three pupils consider that liquid density depends on its quantity. Views about density opposite to the scientific model are owned by pupils who also have confused views about the variables that define density. Our results reveille instructional implications that may lead us to the introduction of density in the obligatory education.
description: Παιδαγωγική Επιθεώρηση, Vol. 25 (1997)
Οι αντιλήψεις των υποψηφίων καθηγητών των Μαθηματικών για τη διδακτική διαδικασία και την επιμόρφωση
Creators: name: Καλδρυμίδου, Μαρία
name: Οικονόμου, Ανδρέας
name: Οικονόμου, Πέτρος
name: Τζεκάκη, Μαριάννα
Publisher: name: Παιδαγωγική Επιθεώρηση
Year: 1997

description: In this paper we present the conception of mathematicians regarding their teaching-training in relation to their views concerning the Leaching of Mathematics, as they emerge from a research on mathematicians who attended the introductory training seminars in P.T.-T.C. (Peripheral Teaching-Training Centres), during the first quarter of 1994-95. The basic hypothesis of this research is that, as the views of the mathematicians on Mathematics and their teaching affect their teaching practice, so their views on the teaching-training affect the effectiveness of this process. The general conclusion of the study of the trainee's conception, confirm that the attitudes-views of the mathematicians, who came to the P.T.-T.C. for their introductory training, are formed on the basis of their ideas regarding themselves, and remain constant throughout the seminars. The dominant conception on the mathematicians' part is that there exists a "correct way of teaching", and they attend the seminars in order to learn it. This view is standardized, does not changed during the seminars, and probably acts as an obstacle on the training process, since it influences the desired training model. The intuitive conceptions of the mathematicians regarding the Didactic of Mathematics and teaching in general, are transformed, during their study in P.T.-T.C, from the "traditional" model and the model of "frondistirion" to the "constructivist" model. The constructive model is perceived by the traineesas applicable to an ideal level of school functioning ("in better conditions"), and they find it hard to applied it to the actual teaching practice in classroom.
description: Παιδαγωγική Επιθεώρηση, Vol. 25 (1997)
New probabilistic interest measures for association rules
Creators: name: Hahsler, Michael
name: Hornik, Kurt
Publisher: name: arXiv
Year: 2008
Subjects: subject: Databases (cs.DB)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences

description: Mining association rules is an important technique for discovering meaningful patterns in transaction databases. Many different measures of interestingness have been proposed for association rules. However, these measures fail to take the probabilistic properties of the mined data into account. In this paper, we start with presenting a simple probabilistic framework for transaction data which can be used to simulate transaction data when no associations are present. We use such data and a real-world database from a grocery outlet to explore the behavior of confidence and lift, two popular interest measures used for rule mining. The results show that confidence is systematically influenced by the frequency of the items in the left hand side of rules and that lift performs poorly to filter random noise in transaction data. Based on the probabilistic framework we develop two new interest measures, hyper-lift and hyper-confidence, which can be used to filter or order mined association rules. The new measures show significantly better performance than lift for applications where spurious rules are problematic.
Κοινωνικές αναπαραστάσεις των εκπαιδευτικών για τον ψηφιακό γραμματισμό
Creators: name: Καϊμακάμη, Αναστασία Γεωργίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2015
Subjects: Ψηφιακός γραμματισμός
Κοινωνικές αναπαραστάσεις
Εκπαίδευση
Digital literacy
Social representations
Education

description: Σκοπός της διπλωματικής εργασίας ήταν η μελέτη των κοινωνικών αναπαραστάσεων των εκπαιδευτικών για τον ψηφιακό γραμματισμό. Ασχοληθήκαμε με το συγκεκριμένο θέμα λόγο του ιδιαίτερου εκπαιδευτικού ενδιαφέροντος που παρουσιάζει. Συγκεκριμένα, μελετήσαμε την περίπτωση των δασκάλων και των νηπιαγωγών. Η εργασία αποτελείται από το θεωρητικό και το ερευνητικό μέρος. Στο θεωρητικό μέρος αναλύεται η έννοια του ψηφιακού γραμματισμού στην εκπαίδευση και η έννοια των κοινωνικών αναπαραστάσεων. Στο ερευνητικό μέρος αναφέρεται η μεθοδολογία της έρευνας, τα αποτελέσματα και τα συμπεράσματα της.
description: The aim of the dissertation is the study of the teachers’ social representations of digital literacy. We examined this issue because of its great educational interest. Specifically, we studied the case of teachers of primary school and of kindergarten. The essay consists of the theoretical and the research part. In the theoretical part, the concept of the digital literacy in education and the concept of social representations are analyzed. In the research part the methodology of the research, the results and the conclusions are referred.
description: Συνεργαζόμενα Τμήματα Πανεπιστήμιο Λε Μαν (Maine France, Γαλλία)
Οι απόψεις των εκπαιδευτικών για την τεχνολογική καινοτομία της εισαγωγής ηλεκτρονικών υπολογιστών στην Κυπριακή Δημοτική Εκπαίδευση
Creators: name: Μιχαηλίδου, Αθηνά
Publisher: name: Παιδαγωγική Επιθεώρηση
Year: 1997

description: The purpose of the research study was twofold; to investigate the teachers' views about the introduction of the computers in the Cyprus primary classroom and to identity any association between their views and their personal characteristics, i.e. gender, years of service, previous experience with the computer use etc. The sample of the survey consisted of 473 primary teachers randomly selected from all over Cyprus. The data collection was operated through a questionnaire. The main findings about the teachers' views were identified
description: Παιδαγωγική Επιθεώρηση, Vol. 25 (1997)
Charging of capacitors with double switch. The principle of operation of auto-zero and chopper-stabilized DC amplifiers
Creators: name: Mishonov, Todor M.
name: Varonov, Albert M.
name: Peshev, Peter V.
name: Yordanov, Vasil G.
name: Manolev, Stojan G.
name: Popeski-Dimovski, Riste
Publisher: name: arXiv
Year: 2015
Subjects: subject: Physics Education (physics.ed-ph)
subject: FOS: Physical sciences

description: The problem given to the 10 Experimental Physics Olympiad (EPO10) 7 December 2023, Skopje, 11:00-15:00. The Olympiad is organized by Society of Physicists Macedonia and the Sofia Branch of the Union of Physicists in Bulgaria. The experimental set-up illustrates the principle of chopper stabilized DC amplifiers described in the patent by Edwin Goldberg and Jules Lehmann, Stabilized direct current amplifier, U.S. Patent 2,684,999 (1949). Now this principle is implemented in many contemporary operational amplifiers. In such a way this student problem is related to the operation of widely used technical device and many participants successfully solved the problem.
description: Updated problem and solution for EPO10, 7 Dec 2023, Skopje, N. Macedonia; 14 pages, 14 figs, 4 tables, 24 refs (including all former EPO problems and related educational and scientific articles); scanned solution of EPO10 absolute champion uploaded as a separate file named "EPO10_Abs-Champ.pdf"
Nesting statistics in the O(n) loop model on random planar maps
Creators: name: Borot, Gaëtan
name: Bouttier, Jérémie
name: Duplantier, Bertrand
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mathematical Physics (math-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Combinatorics (math.CO)
subject: Probability (math.PR)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 05Axx, 60K35, 81T40

description: In the O(n) loop model on random planar maps, we study the depth - in terms of the number of levels of nesting - of the loop configuration, by means of analytic combinatorics. We focus on the 'refined' generating series of pointed disks or cylinders, which keep track of the number of loops separating the marked point from the boundary (for disks), or the two boundaries (for cylinders). For the general O(n) loop model, we show that these generating series satisfy functional relations obtained by a modification of those satisfied by the unrefined generating series. In a more specific O(n) model where loops cross only triangles and have a bending energy, we explicitly compute the refined generating series. We analyse their non generic critical behavior in the dense and dilute phases, and obtain the large deviations function of the nesting distribution, which is expected to be universal. Using the framework of Liouville quantum gravity (LQG), we show that a rigorous functional KPZ relation can be applied to the multifractal spectrum of extreme nesting in the conformal loop ensemble (CLE) in the Euclidean unit disk, as obtained by Miller, Watson and Wilson, or to its natural generalisation to the Riemann sphere. It allows us to recover the large deviations results obtained for the critical O(n) random planar map models. This offers, at the refined level of large deviations theory, a rigorous check of the fundamental fact that the universal scaling limits of random planar map models as weighted by partition functions of critical statistical models are given by LQG random surfaces decorated by independent CLEs.
description: 105 pages, 11 figures. v2: minor text and abstract edits, references added. v4: revised and expanded, including justification of delta analyticity. v5: final version
On deformation spaces of quadratic rational maps
Creators: name: Firsova, Tanya
name: Kahn, Jeremy
name: Selinger, Nikita
Publisher: name: arXiv
Year: 2016
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics

description: We study the group of self-equivalences of a partially postcritically finite branched cover and answer a question of Adam Epstein about contractibility of certain deformation spaces of rational maps.
description: Section 7 on connection with postcritically finite maps and Appendix with classification of equalizing multicurves for Per'4 were added
WISE J044232.92+322734.9: A star-forming galaxy at redshift 1.1 seen through a Galactic dust clump?
Creators: name: Miettinen, Oskari
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Physically unassociated background or foreground objects seen towards submillimetre sources are potential contaminants of both the studies of young stellar objects embedded in Galactic dust clumps and multiwavelength counterparts of submillimetre galaxies (SMGs). We employed the near-infrared and mid-infrared data from the Wide-field Infrared Survey Explorer (WISE) and the submillimetre data from the Planck satellite, and uncovered a source, namely WISE J044232.92+322734.9, whose WISE infrared colours suggest that it is a star-forming galaxy (SFG), and which is seen in projection towards the Planck-detected dust clump PGCC G169.20-8.96. We used the MAGPHYS+photo-$z$ spectral energy distribution code to derive the photometric redshift and physical properties of J044232.92. The redshift was derived to be $z_{\rm phot}=1.132^{+0.280}_{-0.165}$, while, for example, the stellar mass, IR (8-1 000 $μ$m) luminosity, and star formation rate were derived to be $M_{\star}=4.6^{+4.7}_{-2.5}\times10^{11}$ M$_{\odot}$, $L_{\rm IR}=2.8^{+5.7}_{-1.5}\times10^{12}$ L$_{\odot}$, and ${\rm SFR}=191^{+580}_{-146}$ ${\rm M}_{\odot}$ yr$^{-1}$. The derived value of $L_{\rm IR}$ suggests that J044232.92 could be an ultraluminous infrared galaxy, and we found that it is consistent with a main sequence SFG at a redshift of 1.132. Moreover, the estimated physical properties of J044232.92 are comparable to those of SMGs. Further observations, in particular high-resolution (sub-)millimetre and radio continuum imaging, are needed to better constrain the redshift and physical properties of J044232.92 and to see if the source really is a galaxy seen through a Galactic dust clump, in particular an SMG population member at $z\sim1.1$.
description: 7 pages, 4 figures, 3 tables, accepted for publication in A&A, abstract abridged for arXiv
Probing Large-scale UV Background Inhomogeneity Associated with Quasars using Metal Absorption
Creators: name: Morrison, Sean
name: Pieri, Matthew M.
name: Som, Debopam
name: Pérez-Ràfols, Ignasi
Publisher: name: arXiv
Year: 2020
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We study large-scale UV background inhomogeneity in three-dimensions associated with the observed quasar populations at high redshift. We do this by measuring metal absorption through quasar absorption spectrum stacking as a function distance to closest quasar in SDSS-IV/eBOSS on 10s of comoving megaparsec scales. We study both intergalactic medium absorbers and mixed circumgalactic medium absorbers and probe absorption in O VI, C IV, and Si IV, and Si III. Overall stronger high ionization species absorption is seen closer to quasars at $2.4
description: 12 pages, Appendix:2 pages, 13 figures, 4 tables, submitted to MNRAS
Διαφορές στη μαθησιακή ικανότητα και στη σχολική επίδοση σε εφήβους με σχολικές δυσκολίες μετά από πρόγραμμα εκπαιδευτικής παρέμβασης
Creators: name: Κοντοπούλου, Μελανθία
name: Μπάρμπας, Γεώργιος
name: Αναγνωστοπούλου, Ε.
name: Νάνου, Α.
Publisher: name: Παιδαγωγική Επιθεώρηση
Year: 1997

description: Members of the academic staff and other researchers at the Department of Early Childhood Education at Aristotle University of Thessaloniki conducted this research study as part of a research programme carried out at a school in Kria Vrissi, a provincial town in Pella, Greece. The programme contains work designed to face students' underperformance through alternative intervention, concentrating on certain key issues: learning of processes and parents and children's consultation. The study attempts to compare initial and final assessment of the children's cognitive-learning aptitude as well as performance in written narrative speech and problem solving. The theoretical hypothesis used to serve the purpose was that the implied intervention processes not only improve the overall learning aptitude but also student's performance in those learning strategies necessary for the organization of speech and the mathematical thought. The study of the differences in assessment before and after the application of the intervention programme has shown increase in the overall learning aptitude, increase in the special DTLA-2 quotients, directly affected by school learning and particularly language teaching, improvement in the written-narrative speech as well as increase in the number of children who seem to stabilise the acquisition of the problem solving processes. We can thus argue that the overall learning-cognitive aptitude and performance improvement bads us to certain conclusions :- Some kind of supportive intervention is essential for underperforming students.- Improvements in the classroom relationships and the educational procedures contribute to the decrease of the problem of underperformance.
description: Παιδαγωγική Επιθεώρηση, Vol. 25 (1997)
Στάσεις των εκπαιδευτικών απέναντι στα Ο-Α μέσα διδασκαλίας και μάθησης
Creators: name: Βάμβουκας, Μιχάλης Ι.
name: Κανάκης, Ιωάννης Ν.
Publisher: name: Παιδαγωγική Επιθεώρηση
Year: 1997

description: Quelles sont les attitudes des enseignants face aux moyens audio-visuels d'enseignement et d’apprentissage? C est à cette question qu’on essaie de répondre par la recherche ici décrite. Un échantillon de 809 enseignants (135 institutrices du maternelle, 444 instituteurs et 230 professeurs du second degré) ont répondu à un questionnaire d’attitudes dont les 39 items se référaient aux aspects éléments cognitifs et affectifs des images qu' ils peuvent entretenir les sujets avec les moyens audiovisuels.
description: Παιδαγωγική Επιθεώρηση, Vol. 25 (1997)