cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Rapid Risk Minimization with Bayesian Models Through Deep Learning Approximation
Creators: name: Löwe, Mathias
name: Hansen, Per Lunnemann
name: Risi, Sebastian
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (cs.LG)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: We introduce a novel combination of Bayesian Models (BMs) and Neural Networks (NNs) for making predictions with a minimum expected risk. Our approach combines the best of both worlds, the data efficiency and interpretability of a BM with the speed of a NN. For a BM, making predictions with the lowest expected loss requires integrating over the posterior distribution. When exact inference of the posterior predictive distribution is intractable, approximation methods are typically applied, e.g. Monte Carlo (MC) simulation. For MC, the variance of the estimator decreases with the number of samples - but at the expense of increased computational cost. Our approach removes the need for iterative MC simulation on the CPU at prediction time. In brief, it works by fitting a NN to synthetic data generated using the BM. In a single feed-forward pass, the NN gives a set of point-wise approximations to the BM's posterior predictive distribution for a given observation. We achieve risk minimized predictions significantly faster than standard methods with a negligible loss on the test dataset. We combine this approach with Active Learning to minimize the amount of data required for fitting the NN. This is done by iteratively labeling more data in regions with high predictive uncertainty of the NN.
description: 8 pages, 3 figures. Accepted for publishing at IJCNN2021
Ερευνα-παρέμβαση για τη γραφή και την ανάγνωση σε παιδιά προσχολικής ηλικίας
Creators: name: Δανιηλίδου, Ευγενία Α.
Publisher: name: Aristotle University of Thessaloniki
Year: 2004
Subjects: Αναγνωστική ετοιμότητα
Reading readiness

description: Στόχος της διατριβής είναι να διερευνηθεί αν το παιδί της προσχολικής ηλικίας διαθέτει την ετοιμότητα να ευαισθητοποιηθεί στη γραφή και την ανάγνωση μέσω της χρήσης ειδικά σχεδιασμένου και κατάλληλου παιδαγωγικού γλωσσικού υλικού. Επίσης εξετάζει αν το συγκεκριμένο υλικό έχει απήχηση στο παιδί, το προκαλεί, δηλαδή, να εμπλακεί σε ανάλογες δραστηριότητες για να κατακτήσει δεξιότητες της γραφής και της ανάγνωσης. Σχεδιάστηκε ερευνητικό πρόγραμμα, το οποίο εφαρμόστηκε διαδοχικά σε δύο τμήματα δημόσιων νηπιαγωγείων της Θεσσαλονίκης και είχε τρίμηνη διάρκεια σε κάθε ένα από τα δύο τμήματα. Η μέθοδος συλλογής των δεδομένων είναι η συστηματική, συμμετοχική παρατήρηση στο περιβάλλον της τάξης των παιδιών και ως μέσο δομημένο όργανο παρατήρησης. Τηρήθηκε ακόμη ημερολόγιο και πραγματοποιήθηκε μη δομημένη συνέντευξη με τις νηπιαγωγούς των παιδιών. Το πρόγραμμα επιβεβαίωσε τις υποθέσεις εργασίας, καθώς είχε θετική απήχηση στα παιδιά, τα οποία ανέπτυξαν δεξιότητες γραφής και σταδιακά ανάγνωσης και σημείωσαν πρόοδο στη φωνολογική ενημερότητα. Τα αποτελέσματα αυτά ενισχύθηκαν με την έρευνα που ακολούθησε την επόμενη χρονιά, σε τμήμα της πρώτης δημοτικού, με στόχο της κύριας έρευνας στο μάθημα της Γλώσσας. Παρατηρήθηκε χαρακτηριστική ευχέρεια και επιδεξιότητα στον τρόπο χειρισμού της γραφικής ύλης και στην τήρηση των συμβάσεων του γραπτού λόγου καθώς και στις δραστηριότητες της γραφής και της ανάγνωσης
description: The aim of this dissertation is to explore the readings of the preschool child to be acquainted with writing and reading through the use of specially designed and educationally appropriate language material. It also examines whether the particular material appeals to the child and engages him or her in activities so as to acquire writing and reading skills. The program was implemented successively in two public Kindergartens in Thessaloniki for three months in each one of the settings. Data was collected through systematic, participatory observation in the classroom settings with a interviews were additional sources of data. The program confirmed the working hypothesis as it was positively received by the children, who developed writing and gradually reading skills and made progress as to their phonological awareness. These results were confirmed in a follow-up study the next year in a first grade class where a significant number of the main study children attended. The aim of the follow-up study was to observe the children's attituded and scores in the subject of Greek Language. The children were characteristically comfortable and skillful in all of the conventions of the written text, in handling writing material as well in writing and reading activities
Astronomical Science with Laser Guide Star Adaptive Optics: A Brief Review, a Current Snapshot, and a Bright Future
Creators: name: Liu, Michael C.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We briefly discuss the past, present, and future state of astronomical science with laser guide star adaptive optics (LGS AO). We present a tabulation of refereed science papers from LGS AO, amounting to a total of 23 publications as of May 2006. The first decade of LGS AO science (1995-2004) was marked by modest science productivity (~1 paper/year), as LGS systems were being implemented and commissioned. The last two years have seen explosive science growth (~1 paper/month), largely due to the new LGS system on the Keck II 10-meter telescope, and point to an exciting new era for high angular resolution science. To illustrate the achievable on-sky performance, we present an extensive collection of Keck LGS performance measurements from the first year of our brown dwarf near-IR imaging survey. We summarize the current strengths and weaknesses of LGS compared to Hubble Space Telescope, offer a list of desired improvements, and look forward to a bright future for LGS given its wide-scale implementation on large ground-based telescopes.
description: 11 pages, Proceedings of the SPIE Vol. 6272, "Astronomical Telescopes and Instrumentation (Orlando, FL): Advances in Adaptive Optics II" (May 2006), in press
Journal impact measures: the Impact factor
Creators: name: Torres-Salinas, Daniel
name: Robinson-García, Nicolás
Publisher: name: Zenodo
Year: 2019
Subjects: Bibliometrics
Impact Factor
Journal Citation Reports

description: The seminar on impact measures will first shed light on the best known and most controversial indicator, namely Garfield’s Journal Impact Factor. Its strengths and weaknesses as well as its correct use will be discussed thoroughly. Moreover the corresponding analytical tool, Clarivate Analytics’s Journal Citation Reports will be demonstrated. Presented at the european summer school for scientometrics ESSS - July 16th, 2019 - Louvain
Majorana equation and exotics: higher derivative models, anyons and noncommutative geometry
Creators: name: Plyushchay, Mikhail S.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Mathematical Physics (math-ph)
subject: High Energy Physics - Theory (hep-th)
subject: History and Philosophy of Physics (physics.hist-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In 1932 Ettore Majorana proposed an infinite-component relativistic wave equation for particles of arbitrary integer and half-integer spin. In the late 80s and early 90s it was found that the higher-derivative geometric particle models underlie the Majorana equation, and that its (2+1)-dimensional analogue provides with a natural basis for the description of relativistic anyons. We review these aspects and discuss the relationship of the equation to the exotic planar Galilei symmetry and noncommutative geometry. We also point out the relation of some Abelian gauge field theories with Chern-Simons terms to the Landau problem in the noncommutative plane from the perspective of the Majorana equation.
description: 13 pages, refs added; invited article to be published in the special issue of EJTP dedicated to the centenary of the birth of Ettore Majorana
An improvement of agricultural equipment manufacturing by using lean techniques : A case study of agricultural machinery company
Creators: name: Nattariya Pakdeepunya
name: Panitarn Peerapattana
Publisher: name: Faculty of Engineering, Khon Kaen University
Year: 2015
Subjects: Lean,Simulation,Systematic layout planning,Analysis hierarchy process,ECRS

description: 2, 42, KKU Engineering Journal
Development of analysis method of material f low cost accounting using lean technique in food production: A case study of Universal Food Public (UFC) Co.,Ltd.
Creators: name: Wichai Chattinnawat
name: Montri Teeratanasombut
name: Charin Kammoon
Publisher: name: Faculty of Engineering, Khon Kaen University
Year: 2015
Subjects: Material flow cost accounting,Cost allocation,Lean,Productivity improvement

description: 2, 42, KKU Engineering Journal
Οι έξοδοι-επισκέψεις σε εργασιακούς χώρους ως βάση για την ανάπτυξη σχεδίων δράσης στην προσχολική αγωγή
Creators: name: Δάσιου, Αριστέα Ε.
Publisher: name: Aristotle University of Thessaloniki
Year: 2004
Subjects: Εξοδοι-επισκέψεις
Προσχολική αγωγή
Outings-visits
Early childhood education

description: Στόχος της έρευνας είναι να διερευνηθεί ο βαθμός στον οποίο τα σχέδια δράσης που αξιοποιούν την υπάρχουσα πραγματικότητα, αποτελού μια γόνιμη πρακτική για το νηπιαγωγείο. Η διερεύνηση αφορά το βαθμό συμμετοχής των παιδιών στην εφαρμογή των σχεδίων δράσης σε σύγκριση με την τυπική διαδικασία μάθησης. Η παρέμβαση περιλαμβάνει τέσσερα σχέδια δράσης : πηλός, το χαρτί, τα ζώα και τα φυτά. Βασικό σημείο της είναι η έξοδος των παιδιών και η επίσκεψη σε εργασιακούς χώρους με την πολιτισμική και κοινωνική τους διάσταση. Η υπόθεση εργασίας της διατριβής είναι οι έξοδοι-επισκέψεις σε εργασιακούς χώρους μέσα από την ανάπτυξη σχεδίων-δράσης συμβάλλουν στην εμφάνιση θετικών μορφών συμπεριφοράς. Η μέθοδος περιλαμβάνει το σχεδιασμό, την εφαρμογή και την αξιολόγηση των σχεδίων δράσης. Για την εφαρμογή τους επιλέξαμε τέσσερα νηπιαγωγεία στο χωριό. Δημιουργήθηκαν τρεις ομάδες έρευνας. Η πειραματική ομάδα, η ομάδα ελέγχου και η πειραματική ομάδα του δασκάλου. Στην έρευνα συμμετείχαν παιδιά ηλικίας 3(1/2)-5(1/2). Πραγματοποιήθηκαν μετρήσεις στα πειραματικά σχολεία και στα σχοελεία ελέγχου. Από τη στατιστική ανάλυση προέκυψε ότθ τα παιδιά της πειραματικής ομάδας εμφάνισαν περισσότερες θετικές συμπεριφορές από τα παιδιά της ομάδας ελέγχου. Τα ευρήματα μας δείχνουν ότι η παρέμβαση μπορεί να αποτελέσει μια εναλλακτική πρόταση του αναλυτικού προγράμματος του νηπιαγωγείου
description: The subject of this research is the "outing-visits" at working places as a base for the development of projects in early childhood education. The aim of this study is to research the level at which such projects, which explore the current reality, could be a useful practice for the Kindergarten. This research explores the level of children's participation in the development of such projects in comparison with the typical learning process. The intervention consists of four projects. These are : the clay; the paper; the animals and the plants. The basic point of this intervention is the children's outings and visits at working places including the social and cultural aspect of these places. The research's hypothesis is that the outings-visits at working places through the development of such projects contribute to the development of positive attitudes. The method consists of the design, the applicationand the evaluation of the projects. For the application four Kindergartens in the city, four in the village and equivalent working places were chosen. Three research groups were developed for comparisons. Measurements were conducted at both experimental and control schools. The statistical analysis indicates that the children of the experimental group developed more attitudes contrary to the children of the control group. The results reveal that intervention through such projects could be an alternative suggestion to the analytical progamme of the Kindergarten
The Youngest Galactic Supernova Remnant: G1.9+0.3
Creators: name: Reynolds, S. P.
name: Borkowski, K. J.
name: Green, D. A.
name: Hwang, U.
name: Harrus, I.
name: Petre, R.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Our 50 ks Chandra observation of the small radio supernova remnant (SNR) G1.9+0.3 shows a complete shell structure with strong bilateral symmetry, about $100''$ in diameter. The radio morphology is also shell-like, but only about $84''$ in diameter, based on observations made in 1985. We attribute the size difference to expansion between 1985 and our Chandra observations of 2007. Expansion is confirmed in comparing radio images from 1985 and 2008. We deduce that G1.9+0.3 is of order 100 years old -- the youngest supernova remnant in the Galaxy. Based on a very high absorbing column density of $5.5 \times 10^{22}$ cm$^{-2}$, we place G1.9+0.3 near the Galactic Center, at a distance of about 8.5 kpc, where the mean remnant radius would be about 2 pc, and the required expansion speed about $14,000$ km s$^{-1}$. The X-ray spectrum is featureless and well-described by the exponentially cut off synchrotron model {\tt srcut}. With the radio flux at 1 GHz fixed at 0.9 Jy, we find a spectral index of 0.65 and a rolloff frequency of $1.4 \times 10^{18}$ Hz. The implied characteristic rolloff electron energy of about $94 (B/10 μ{\rm G})^{-1/2}$ TeV is the highest ever reported for a shell supernova remnant. It can easily be reached by standard diffusive shock acceleration, given the very high shock velocities; it can be well described by either age-limited or synchrotron-loss-limited acceleration. Not only is G1.9+0.3 the youngest known Galactic remnant, it is also only the fourth Galactic X-ray synchrotron-dominated shell supernova remnant.
description: 4 pages, 5 figures; revised to include new radio data and accepted for ApJL
Infrared Maximally Abelian Gauge
Creators: name: Mendes, Tereza
name: Cucchieri, Attilio
name: Mihara, Antonio
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: The confinement scenario in Maximally Abelian gauge (MAG) is based on the concepts of Abelian dominance and of dual superconductivity. Recently, several groups pointed out the possible existence in MAG of ghost and gluon condensates with mass dimension 2, which in turn should influence the infrared behavior of ghost and gluon propagators. We present preliminary results for the first lattice numerical study of the ghost propagator and of ghost condensation for pure SU(2) theory in the MAG.
description: 3 pages, 4 figures; work presented at QCHS7 in Ponta Delgada (PT) Sept 2-7, 2006
The Importance of Causality in Decision Making: A Perspective on Recommender Systems
Creators: name: Cavenaghi, Emanuele
name: Zanga, Alessio
name: Stella, Fabio
name: Zanker, Markus
Publisher: name: arXiv
Year: 2024
Subjects: subject: Information Retrieval (cs.IR)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: Causality is receiving increasing attention in the Recommendation Systems (RSs) community, which has realised that RSs could greatly benefit from causality to transform accurate predictions into effective and explainable decisions. Indeed, the RS literature has repeatedly highlighted that, in real-world scenarios, recommendation algorithms suffer many types of biases since assumptions ensuring unbiasedness are likely not met. In this discussion paper, we formulate the RS problem in terms of causality, using potential outcomes and structural causal models, by giving formal definitions of the causal quantities to be estimated and a general causal graph to serve as a reference to foster future research and development.
description: Accepted at the CONSEQUENCES '24 workshop, co-located with ACM RecSys '24
The study of temperature distribution in steel rods welded by friction welding using computer simulation
Creators: name: Pakorn Auntaisong
name: Chawalit Thinvongpituk
name: Ratchada Sopakayang
name: Somya Poonaya
Publisher: name: Faculty of Engineering, Khon Kaen University
Year: 2015
Subjects: Temperature distribution,Friction welding,Low carbon steel,Finite element analysis

description: 2, 42, KKU Engineering Journal
Control loop performance
Creators: name: Lynch, Christopher
Publisher: name: University of British Columbia
Year: 2008

description: Control loop monitoring provides the opportunity to maintain high process performance. In this thesis, the regulation performance of a process is monitored by examining the time delay, static input-output relation, and the minimum achievable output variance of the process. The time delay estimate is obtained from the Fixed Model Variable Regressor Estimator and the static input-output relation is estimated using the Adaptive Nonlinear Modeller. The minimum achievable output variance of the process is determined by modelling the closed loop noise transfer function by a Laguerre network and finding the Laguerre gains of the network using Recursive Extended Least Squares estimation. An extensive simulation study was performed to examine the operation, usefulness and limitations of the monitoring tools. These simulations confirmed the operation and benefit of the monitoring methods, and defined their limitations. The monitoring tools were applied to data generated by industrial processes. The successful application to industrial processes highlighted the benefits obtainable by control loop monitoring. Due to the ease of applying the monitoring tools and the valuable insight they provide, these monitoring tools should be applied to any process where regulation performance is a concern.
Production of activated carbon from peanut hill using phosphoric acid and microwave activation
Creators: name: Weerawat Clowutimon
name: Pornsawan Assawasaengrat
Publisher: name: Faculty of Engineering, Khon Kaen University
Year: 2015
Subjects: Activated carbon,Peanut hull,Microwave activation

description: 2, 42, KKU Engineering Journal
The effect of atmospheric turbulence on entangled orbital angular momentum states
Creators: name: Gopaul, C.
name: Andrews, R.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We analyze the effect of atmospheric Kolmogorov turbulence on entangled orbital angular momentum states generated by parametric down-conversion. We calculate joint and signal photon detection probabilities and obtain numerically their dependence on the mode-width-to-Fried-parameter ratio. We demonstrate that entangled photons are less robust to the effects of Kolmogorov turbulence compared to single photons. In contrast, signal photons are more robust than single photons in the lowest-order mode. We also obtain numerically a scaling relation between the value of the mode-width-to-Fried-parameter ratio for which the joint detection probabilities is a maximum and the momentum mismatch between signal and idler photons after propagation through the medium.
description: To appear in New Journal of Physics
Chiral flux phase in the Kagome superconductor AV$_3$Sb$_5$
Creators: name: Feng, Xilin
name: Jiang, Kun
name: Wang, Ziqiang
name: Hu, Jiangping
Publisher: name: arXiv
Year: 2021
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We argue that the topological charge density wave phase in the quasi-2D Kagome superconductor AV$_3$Sb$_5$ is a chiral flux phase. Considering the symmetry of the Kagome lattice, we show that the chiral flux phase has the lowest energy among those states which exhibit $2\times2$ charge orders observed experimentally. This state breaks the time-reversal symmetry and displays anomalous Hall effect. The explicit pattern of the density of this state in real space is calculated. These results are supported by recent experiments and suggest that these materials are a new platform to investigate the interplay between topology, superconductivity and electron-electron correlations.
description: 5 pages, 3 figures, to be published in Science Bulletin
Quantum CDMA Communication Systems
Creators: name: Rezai, Mohammad
name: Salehi, Jawad A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Barcoding photons can provide a host of functionalities that could benefit future quantum communication systems and networks beyond today's imagination. As a significant application of barcoding photons, we introduce code division multiple-access (CDMA) communication systems for various applications. In this context, we introduce and discuss the fundamental principles of a novel quantum CDMA (QCDMA) technique based on spectrally encoding and decoding of continuous-mode quantum light pulses. In particular, we present the mathematical models of various QCDMA modules that are fundamental in describing an ideal and typical QCDMA system, such as quantum signal sources, quantum spectral encoding phase operators, M$\times$M quantum broadcasting star-coupler, quantum spectral phase decoding operators, and the quantum receivers. In describing a QCDMA system, this paper considers a unified approach where the input continuous-mode quantum light pulses can take on any form of pure states such as Glauber states and quantum number states. For input number states, one can observe features like entanglement and quantum interference. More interestingly, due to Heisenberg's uncertainty principle, the quantum signals sent by photon number states obtain complete phase uncertainty at the time of measurement. Therefore, at the receiver output, the multiaccess inter-signal interference vanishes. Due to Heisenberg's uncertainty principle, the received signal intensity at the photodetector's output changes from a coherent detection scheme for input Glauber states to an incoherent detection scheme for input number states. Our mathematical model is valuable in the signal design and data modulations of point-to-point quantum communications, quantum pulse shaping, and quantum radar signals and systems where the inputs are continuous mode quantum signals.
description: 22 pages, 8 figures, to be published in IEEE Transactions on Information Theory
A study of speed limits and speed control measures for the urban arterial road
Creators: name: Wichuda Satiennam
name: Phongphan Tankasem
name: Thaned Satiennam
Publisher: name: Faculty of Engineering, Khon Kaen University
Year: 2015
Subjects: Speed,Speed limits,Urban arterial road,Speed management,Driver altitude

description: 2, 42, KKU Engineering Journal
Additional file 1 of Waist-to-height ratio, an optimal anthropometric indicator for metabolic dysfunction associated fatty liver disease in the Western Chinese male population
Creators: name: Cai, Jinwei
name: Lin, Cuiting
name: Lai, Shuiqing
name: Liu, Yingshan
name: Liang, Min
name: Qin, Yingfen
name: Liang, Xinghuan
name: Tan, Aihua
name: Gao, Yong
name: Lu, Zheng
name: Wu, Chunlei
name: Huang, Shengzhu
name: Yang, Xiaobo
name: Zhang, Haiying
name: Kuang, Jian
name: Mo, Zengnan
Publisher: name: figshare
Year: 2021
Subjects: subject: Biochemistry
subject: Medicine
subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Biotechnology
subject: Chemical Sciences not elsewhere classified
subject: Ecology
subject: Sociology
subject: FOS: Sociology
subject: Biological Sciences not elsewhere classified
subject: Computational Biology

description: Additional file 1: Table S1. Spearman rank correlation analysis of anthropometric indicators and sex hormones in study male population (n = 2355).
Value of Information in the Mean-Square Case and its Application to the Analysis of Financial Time-Series Forecast
Creators: name: Belavkin, Roman
name: Pardalos, Panos
name: Principe, Jose
Publisher: name: arXiv
Year: 2024
Subjects: subject: Statistical Finance (q-fin.ST)
subject: FOS: Economics and business
subject: 94A15, 94A17, 94A34, 62J12, 62M45, 60G25

description: The advances and development of various machine learning techniques has lead to practical solutions in various areas of science, engineering, medicine and finance. The great choice of algorithms, their implementations and libraries has resulted in another challenge of selecting the right algorithm and tuning their parameters in order to achieve optimal or satisfactory performance in specific applications. Here we show how the value of information (V(I)) can be used in this task to guide the algorithm choice and parameter tuning process. After estimating the amount of Shannon's mutual information between the predictor and response variables, V(I) can define theoretical upper bound of performance of any algorithm. The inverse function I(V) defines the lower frontier of the minimum amount of information required to achieve the desired performance. In this paper, we illustrate the value of information for the mean-square error minimization and apply it to forecasts of cryptocurrency log-returns.
Method development for verif ication the completeancient statues by image processing
Creators: name: Natthariya Laopracha
name: Umaporn Saisangjan
name: Rapeeporn Chamchong
Publisher: name: Faculty of Engineering, Khon Kaen University
Year: 2015
Subjects: Image processing,Statue detection,Feature extraction,Object detection

description: 2, 42, KKU Engineering Journal
A neo-piagetian perspective on student teachers’ representations of the real life teaching problem: adapting instruction to individual differences among learners
Creators: name: Newman, Lorna J.
Publisher: name: University of British Columbia
Year: 2008

description: This study was an exploratory study of how student teachers represent the real life teaching problem of adapting their instruction to individual differences among learners and how their representation changes over the course of the practicum experience. The extent to which Cases' (1985, 1991) neo-Piagetian conceptual framework may describe the development of these student teachers' ability to represent this real life teaching problem was also examined. The non-random sample consisted of 39 intermediate level student teachers who completed three sets of questionnaires prior to and during the fourth and ninth weeks of the practicum experience. Twelve faculty supervisors also completed rating forms and observations on the student teachers they supervised during the same weeks. Student teachers' responses to two questions regarding aspects of individual differences problematic for teaching prior to and during the practicum experience were rated according to the levels of problem representation derived from Case's neo-Piagetian theory of intellectual development. Faculty supervisors' rating forms and observations provided a means of assessing whether student teachers translated their representations into action. An additional variable of interest to the study included the nature of the individual differences noted by student teachers. The results suggested that student teachers' level of problem representation and description of the problem increased in complexity over the course of the practicum experience. Also, that Case's neo-Piagetian conceptual framework may provide a useful theoretical tool for describing the development of student teachers' ability to represent the individual differences teaching problem. Implications for teacher education and studies of teacher thinking were discussed. The need for clinical interviews augmented by classroom observations made by supervisors trained in a neo-Piagetian developmental perspective was emphasized for future studies. Several research questions, related to the use and further development of Case's neo-Piagetian conceptual framework in the domain of teaching, were generated.
Honoring What They Say Part I: Developing the Froceee Mode!
Creators: name: Archibald, Jo-Ann
name: Bowman, Sheena Selkirk
name: Pepper, Floy
name: Urion, Carl
Publisher: name: Canadian Journal of Native Education
Year: 2021

description: NA
description: Canadian Journal of Native Education, Vol. 21 No. 1 (1995)
Συνεισφορά στη μελέτη της γεωτεκτονικής εξέλιξης της μάζας της Ροδόπης με εφαρμογή μαγνητικών μεθόδων(ΑΜΕ : ανισοτροπία της μαγνητικής επιδεκτικότητας) σε γρανιτικά πετρώματα
Creators: name: Ζανανίρι, Ειρήνη Σ.
Publisher: name: Aristotle University of Thessaloniki
Year: 2004
Subjects: Πλουτωνίτης Βροντούς
Πλουτωνίτης Συμβόλου
Vrondou pluton
Rhodope massif

description: Στην παρούσα διδακτορική διατριβή μελετήθηκαν η μαγνητική τοποθέτηση και η παραμόρφωση των τριτογενών πλουτωνιτών της Βροντούς και του Συμβόλου, με τη χρήση μαγνητικών μεθόδων(ανισοτροπία της μαγνητικής επιδεκτικότητας, παλαιομαγνητισμός, μαγνητική ορυκτολογία). Τα αποτελέσματα συνδυάστηκαν με τεκτονικές παρατηρήσεις υπαίθρου και μελέτη μικροϊστολογικών χαρακτηριστικών. Εξετάζοντας όλα τα παραπάνω παρατηρήθηκε διαφορετική συμπεριφορά της μεσο-Ολιγοκαινικής ανατολικής Βροντούς σε σχέση με την κάτω-Μειοκαινική δυτική Βροντού και τον σύγχρονό της πλουτωνίτη του Συμβόλου. Στην πρώτη περίπτωση η επικρατούσα γράμμωση έχει διεύθυνση ΒΔ-ΝΑ και αντιπροσωπεύει διεύθυνση μαγματικής ροής, ενλω στη δεύτερη περίπτωση η επικρατούσα γράμμωση είναι ΒΑ-ΝΔ και είναι αποτέλεσμα πλαστικής παραμόρφωσης σε συνθήκες κάτω από τη solidus
description: The present study focuses on the Early Miocene Symvolon pluton and the composite Vrondou pluton(Mid-Oligocene at its eastern and Early Miocene at its western parts). Their emplacement and tectonic evolution has been studied by a combination of field tectonic microtextural and anisotropy of magnetic susceptibility methods. Paleomagnetic measurements and experiments to determine the magnetic mineralogy were also performed. Two groups of magnetic lineations were identified : a prevailing NE-SW-trending linear fabric, visible mainly in the Early Miocene plutons deformation and a second NW-SE-trending fabric, clearly imprinted in the Mid-Oligocene eastern Vrondou and attributed to magnetic flow direction
Вестник Российского нового университета серия «Сложные системы: модели, анализ, управление», Выпуск 22019
Creators: name: Автономная некоммерческая организация высшего образования «Российский новый университет»
Publisher: name: Вестник Российского нового университета серия «Сложные системы: модели, анализ, управление»
Year: 2019

description: , Выпуск 22019
Forward and Backward Bellman equations improve the efficiency of EM algorithm for DEC-POMDP
Creators: name: Tottori, Takehiro
name: Kobayashi, Tetsuya J.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (cs.LG)
subject: Multiagent Systems (cs.MA)
subject: Optimization and Control (math.OC)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: Decentralized partially observable Markov decision process (DEC-POMDP) models sequential decision making problems by a team of agents. Since the planning of DEC-POMDP can be interpreted as the maximum likelihood estimation for the latent variable model, DEC-POMDP can be solved by the EM algorithm. However, in EM for DEC-POMDP, the forward--backward algorithm needs to be calculated up to the infinite horizon, which impairs the computational efficiency. In this paper, we propose the Bellman EM algorithm (BEM) and the modified Bellman EM algorithm (MBEM) by introducing the forward and backward Bellman equations into EM. BEM can be more efficient than EM because BEM calculates the forward and backward Bellman equations instead of the forward--backward algorithm up to the infinite horizon. However, BEM cannot always be more efficient than EM when the size of problems is large because BEM calculates an inverse matrix. We circumvent this shortcoming in MBEM by calculating the forward and backward Bellman equations without the inverse matrix. Our numerical experiments demonstrate that the convergence of MBEM is faster than that of EM.
Charged torus-like black holes as heat engines
Creators: name: Feng, Hanwen
name: Huang, Yuchen
name: Hong, Wei
name: Tao, Jun
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We investigate the thermodynamical properties of charged torus-like black holes and take it as the working substance to study the heat engines. In the extended phase space, by interpreting the cosmological constant as the thermodynamic pressure, we derive the thermodynamical quantities by the first law of black hole thermodynamics and obtain the equation of state. Then, we calculate the efficiency of the heat engine in Carnot cycle as well as rectangular cycle, and investigate how the efficiency changes with respect to volume. In addition, to avoid a negative temperature, we emphasize that the charge of this black hole can not be arbitrary. Last, we check the calculation accuracy of a benchmark scheme and discuss the upper bound and lower bound for charged torus-like black hole in the scheme.
description: 16 pages, 8 figures, accepted by Communications in Theoretical Physics
Ευφυή συστήματα σχεδιασμού ενεργειών
Creators: name: Βράκας, Δημήτριος Α.
Publisher: name: Aristotle University of Thessaloniki
Year: 2004
Subjects: Σχεδιασμός ενεργειών
Ευριστική αναζήτηση
Αναζήτηση διπλής κατεύθυνσης
Παράλληλοι αλγόριθμοι
Μηχανική μάθηση
Φιλικά περιβάλλοντα χρήσης
Planning
Heuristic search
Bi-directional search
Parallel algorithms
Machine learning
Friendly user interfaces

description: Η ερευνητική εργασία που παρουσιάζεται στην παρούσα διατριβή επικεντρώνεται στον αυτόματο σχεδιασμό ενεργειών, με αναζήτηση στο χώρο των καταστάσεων και χρήση γενικών ευριστικών μηχανισμών καθοδήγησης. Προτείνονται τεχνικές ενίσχυσης των σχεδιασμών της κατηγορίας και παρουσιάζονται συστήματα που τις υλοποιούν μέσω των οποίων γίνεται και η ποσοτική αξιολόγησή τους. Οι τεχνικές αυτές συνοψίζονται στην παραλληλοποίηση της διαδικασίας αναζήτησης μέσω της ομοιόμορφης κατανομής των τελεστών, στη χρήση υβριδικών στρατηγικών που συνδυάζουν ορθή και ανάστροφη ευριστική αναζήτηση, στην αξιοποίηση μεθοδολογιών Μηχανικής Μάθησης και Συστημάτων Γνώσης για την αυτόματη προσαρμογή των σχεδιαστικών στη δομή του εκάστοτε προβλήματος και τέλος στην κατασκευή γραφικών εργαλείων για τους απλούς χρήστες, τους μηχανικούς της γνώσης και τους ειδικούς του πεδίου εφαρμογής
description: The research work presented in the dissertation focuses on state-space search, guided by general domain-independent heuristic functions and guiding mechanisms. It propose techniques that enhance the existing planners, introduces systems that implement these techniques in order to assess their benefits. The proposed techniques fall into four categories : a)parallelizing the process of creating plans, in order to reduce the required time when the planner is executed in a parallel or distributed computing environment b)using hybrid search strategies that combine search in both directions and powerful heuristic mechanisms, c)applying machine learning techniques in order to utilize the experience drawn from past executions, in order to make planners work better in the future and d)developing graphical user interfaces for planning systems that can assist all kind of users(Knowledge engineers, domain experts, end-users e.t.c.)
What we should learn from pandemic publishing
Creators: name: Sikdar, Satyaki
name: Venturini, Sara
name: Charpignon, Marie-Laure
name: Kumar, Sagar
name: Rinaldi, Francesco
name: Tudisco, Francesco
name: Fortunato, Santo
name: Majumder, Maimuna S.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Digital Libraries (cs.DL)
subject: Other Quantitative Biology (q-bio.OT)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences
subject: FOS: Biological sciences

description: Authors of COVID-19 papers produced during the pandemic were overwhelmingly not subject matter experts. Such a massive inflow of scholars from different expertise areas is both an asset and a potential problem. Domain-informed scientific collaboration is the key to preparing for future crises.
Anomaly Detection on Attributed Networks via Contrastive Self-Supervised Learning
Creators: name: Liu, Yixin
name: Li, Zhao
name: Pan, Shirui
name: Gong, Chen
name: Zhou, Chuan
name: Karypis, George
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Anomaly detection on attributed networks attracts considerable research interests due to wide applications of attributed networks in modeling a wide range of complex systems. Recently, the deep learning-based anomaly detection methods have shown promising results over shallow approaches, especially on networks with high-dimensional attributes and complex structures. However, existing approaches, which employ graph autoencoder as their backbone, do not fully exploit the rich information of the network, resulting in suboptimal performance. Furthermore, these methods do not directly target anomaly detection in their learning objective and fail to scale to large networks due to the full graph training mechanism. To overcome these limitations, in this paper, we present a novel contrastive self-supervised learning framework for anomaly detection on attributed networks. Our framework fully exploits the local information from network data by sampling a novel type of contrastive instance pair, which can capture the relationship between each node and its neighboring substructure in an unsupervised way. Meanwhile, a well-designed graph neural network-based contrastive learning model is proposed to learn informative embedding from high-dimensional attributes and local structure and measure the agreement of each instance pairs with its outputted scores. The multi-round predicted scores by the contrastive learning model are further used to evaluate the abnormality of each node with statistical estimation. In this way, the learning model is trained by a specific anomaly detection-aware target. Furthermore, since the input of the graph neural network module is batches of instance pairs instead of the full network, our framework can adapt to large networks flexibly. Experimental results show that our proposed framework outperforms the state-of-the-art baseline methods on all seven benchmark datasets.
description: 15 pages, 5 figures, 6 tables. Published in IEEE Transactions on Neural Networks and Learning Systems (TNNLS)
The LMC's Top 250: Classification of the Most Luminous Compact 8 micron Sources in the Large Magellanic Cloud
Creators: name: Kastner, Joel H.
name: Thorndike, Stephen L.
name: Romanczyk, Paul A.
name: Buchanan, Catherine
name: Hrivnak, Bruce J.
name: Sahai, Raghvendra
name: Egan, Michael
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: To ascertain the nature of the brightest compact mid-infrared sources in the Large Magellanic Cloud (LMC), we have applied an updated version of the Buchanan et al. (2006) 2MASS-MSX color classification system, which is based on the results of Spitzer Space Telescope spectroscopy, to a mid-infrared (8 micron) flux-limited sample of 250 LMC objects for which 2MASS and MSX photometry is available. The resulting 2MASS-MSX ("JHK8") color-based classifications of these sources, which constitute the most mid-IR-luminous objects in the LMC, were augmented, cross-checked, and corrected where necessary via a variety of independent means, such that only 47 sources retain tentative classifications and only 10 sources cannot be classified at all. The sample is found to consist primarily of carbon-rich AGB stars (~35%), red supergiants (~18%), and compact H II regions (~30%), with additional, small populations of oxygen-rich AGB stars (~4%), dusty, early-type emission-line stars (~3%), and foreground, O-rich AGB stars in the Milky Way (~3%). The very large ratio of C-rich to O-rich objects among the luminous and heavily dust-enshrouded AGB stars in our LMC IR source sample is consistent with the hypothesis that carbon stars form easily in lower metallicity environments. We demonstrate that very luminous C-rich and O-rich AGB stars and red supergiants, identified here primarily on the basis of their JHK8 colors, also appear as distinct clusters in Spitzer IRAC/MIPS color-color diagrams. Thus, in principle, the IRS-based IR photometric classification techniques applied here to the LMC can be applied to any external galaxy whose most luminous IR point sources are detectable and resolvable by 2MASS and Spitzer.
description: 51 pages, 10 figures, 5 tables; submitted to the Astronomical Journal
Public interest in science or bots? Selective amplification of scientific articles on Twitter
Creators: name: Rahman, Ashiqur
name: Mohammadi, Ehsan
name: Alhoori, Hamed
Publisher: name: arXiv
Year: 2024
Subjects: subject: Social and Information Networks (cs.SI)
subject: Computers and Society (cs.CY)
subject: Digital Libraries (cs.DL)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: With the remarkable capability to reach the public instantly, social media has become integral in sharing scholarly articles to measure public response. Since spamming by bots on social media can steer the conversation and present a false public interest in given research, affecting policies impacting the public's lives in the real world, this topic warrants critical study and attention. We used the Altmetric dataset in combination with data collected through the Twitter Application Programming Interface (API) and the Botometer API. We combined the data into an extensive dataset with academic articles, several features from the article and a label indicating whether the article had excessive bot activity on Twitter or not. We analyzed the data to see the possibility of bot activity based on different characteristics of the article. We also trained machine-learning models using this dataset to identify possible bot activity in any given article. Our machine-learning models were capable of identifying possible bot activity in any academic article with an accuracy of 0.70. We also found that articles related to "Health and Human Science" are more prone to bot activity compared to other research areas. Without arguing the maliciousness of the bot activity, our work presents a tool to identify the presence of bot activity in the dissemination of an academic article and creates a baseline for future research in this direction.
description: 38 pages, 10 figures. Aslib Journal of Information Management, Vol. ahead-of-print No. ahead-of-print
title: Πρόβλεψη πτώχευσης επιχειρήσεων με την πολυκριτήρια μέθοδο UTADIS
title: Business failure prediction using the multiple criteria method UTADIS
Creators: name: Σπηλιοπουλου Νεφελη-Μαρια
Publisher: name: Technical University of Crete
Year: 2021

description:  Οι επιχειρήσεις αποτελούν μεγάλο μέρος της οικονομίας των χωρών. Διάφοροι είναι οι παράγοντες που δυσχεραίνουν την βιωσιμότητα τους. Γι’ αυτό το λόγο κρίνεται απαραίτητη η πρόβλεψη της πτώχευσής τους. Πολλοί είναι οι ερευνητές, οι οποίοι, τις τελευταίες δεκαετίες έχουν διεξάγει μελέτες για την ανάπτυξη μεθόδων που εκτιμούν τη μελλοντική εξέλιξη των επιχειρήσεων και κατά συνέπεια, τον κίνδυνο πτώχευσης αυτών. Ωστόσο η έρευνα αυτή συνεχίζει να εξελίσσεται, όσο εμφανίζονται νέες μεθοδολογίες από τα επιστημονικά πεδία, τόσο της διοικητικής επιστήμης όσο και της επιστήμης των υπολογιστών.
Η παρούσα διπλωματική εργασία έχει ως στόχο με την χρήση της πολυκριτήριας μεθόδου, UTADIS, να εκτιμήσει την πιθανότητα πτώχευσης μικρομεσαίων επιχειρήσεων της Ευρώπης.

description: Companies represent a vital stake for the countries’ economy. There are several factors impacting their viability therefore it is necessary to predict their possible failure. For the last decades, several researches have been held in order to develop methods capable to predict their future development and the possibility of them being led to bankruptcy. However further studies take place, since new methods of administrative and computer science are brought into light.
The present thesis has targeted the prediction of failure for various small and medium sized European companies using the multiple criteria method, UTADIS.
Μελέτη της παρουσίας και της απομάκρυνσης παραμενόντων οργανικών ρύπων κατά τη διαδικασία επεξεργασίας αστικών λυμάτων
Creators: name: Κατσογιάννης, Αθανάσιος
Publisher: name: Aristotle University of Thessaloniki
Year: 2004
Subjects: Παραμένοντες οργανικοί ρύποι
Τοξικότητα
Ημιπερατές μεμβράνες
Μοντέλο Fate
Persistent organic pollutants
Toxicity
Semipermeable memranes
Fate model

description: Η παρούσα διατριβή πραγματεύεται την παρακολούθηση της τύχης υδρόφοβων οργανικών ενώσεων σε μια εγκατάσταση επεξεργασίας λυμάτων. Μελετώνται τα ποσοστά απομάκρυνσης αυτών των ενώσεων, τα ισοζύγια μάζας, η κατανομή τους ανάμεσα στη διαλυτή και στη ροφημένη φάση, καθώς και το κλάσμα των ενώσεων που εκρέει μέσω τη τελικής εξόδου του βιολογικού καθαρισμού. Τέλος, γίνεται οικοτοξολογική αξιολόγηση της επεξεργασίας και εφαρμογή μαθηματικών μοντέλων που προβλέπουν την τύχη των παραμένοντων ρύπων σε ένα βιολογικό καθαρισμό
description: The present thesis describes the occurence and fate of persistent organic pollutants during the wasterwater treatment process. Distribution between sorbed and dissolved phases, mass balances for each treatment stage and removal rates of PoPs are being calculated. Besides, the fate model is being evaluated for its efficiency in predicting the fate of hydrophobic compounds during the wasterwater treatment process. Finally, an ecotoxicological evaluation of the wasterwater treatment process was done to examine the effects of the effluent wasterwater in aquatic organisms