cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Impact of prescribed burning on diffuse knapweed (centaurea diffusa) infestations and floral diversity in Kalamalka Lake Provincial Park
Creators: name: Nicholson, Andrew Ross
Publisher: name: University of British Columbia
Year: 2009

description: This study investigated the infestation of Kalamalka Lake Provincial Park, British Columbia by diffuse knapweed (Centaurea diffusa Lam.). Surveys of six different types of grassland ecosystem association/seral stages for species richness and diversity in the spring of 1990 and 1991, and for diffuse knapweed density in the fall of 1990 and 1991 revealed that increasing diffuse knapweed density was not associated with reduced richness or lower diversity. A multiple discriminant analysis on the density of diffuse knapweed showed that the level of accessibility of a site was the most important factor in the spread of knapweed, and that the amount of bare soil may be an important co-factor. A multiple discriminant analysis for species richness revealed that time since the last herbicide treatment was the most important factor affecting species richness of a site. A prescribed burning experiment was conducted on two sites in Kalamalka Lake Provincial Park. One site was infested with diffuse knapweed. Neither spring nor fall burning reduced (p>0.05) any class of knapweed (i.e. seedlings, rosettes, bolted plants, or total knapweed). The other site initially had no knapweed, and neither burning treatment resulted in the establishment of any knapweed up to the end of the first growing season after the burns. Although there were initial differences in the richness and diversity of the two sites, neither burning treatment altered (p>0.05) the seasonal pattern or level of richness or diversity by the end of the study. Both spring and fall burning treatments reduced the amount of available fuel and increased the amount of bare soil. The increase in percent bare soil was strongly correlated (r2=0.792) to fire intensity. Management recommendations include continued monitoring of the burn sites to determine if the burning treatments result in changes in the density of knapweed or species richness over the next few years. A moratorium on the use of herbicides is also recommended in order to maintain species richness and diversity in the park.
A Graduate Course on E-commerce Information Systems Engineering
Creators: name: Grundy, John C.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computers and Society (cs.CY)
subject: FOS: Computer and information sciences

description: Interest in developing and deploying E-commerce systems has grown greatly over the past few years, leading to a major shortage of qualified developers. This paper describes the development of a graduate course in E-commerce education that has been implemented as part of an Honours degree programme and a first year Masters offering for a traditional Information Systems programme. The aim of this course is to give graduate students a broad grounding and holistic set of skills to enable them to begin successful E-commerce systems development. This paper provides a background and context for this course, an overview and discussion of the course content, delivery methods and practical focus, and discusses experience in running and evolving the course over the past two years. We hope that our experiences and approaches will be useful for others who are planning similar courses focusing on E-commerce systems engineering.
description: Preprint to appear in
Potential Neutrino Signals from Galactic Gamma-Ray Sources
Creators: name: Kappes, Alexander
name: Hinton, Jim
name: Stegmann, Christian
name: Aharonian, Felix A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The recent progress made in Galactic gamma-ray astronomy using the High Energy Stereoskopic System (H.E.S.S.) instrument provides for the first time a population of Galactic TeV gamma-rays, and hence potential neutrino sources, for which the neutrino flux can be estimated. Using the energy spectra and source morphologies measured by H.E.S.S., together with new parameterisations of pion production and decay in hadronic interactions, we estimate the signal and background rates expected for these sources in a first-generation water Cherenkov detector (ANTARES) and a next-generation neutrino telescope in the Mediterranean Sea, KM3NeT, with an instrumented volume of 1 km^3. We find that the brightest gamma-ray sources produce neutrino rates above 1 TeV, comparable to the background from atmospheric neutrinos. The expected event rates of the brightest sources in the ANTARES detector make a detection unlikely. However, for a 1 km^3 KM3NeT detector, event rates of a few neutrinos per year from these sources are expected, and the detection of individual sources seems possible. Although generally these estimates should be taken as flux upper limits, we discuss the conditions and type of gamma-ray sources for which the neutrino flux predictions can be considered robust.
description: 20 pages, 4 figures; v2: ERROR in energy scale of KM3NeT effective neutrino area corrected which resulted in event rates being about a factor 3 too low; v3: grammatical changes and update of references after receiving proofs
Ανάπτυξη τυπικής γλώσσας επιχειρηματικών διεργασιών
Creators: name: Υφαντίδης, Γεώργιος Ελευθερίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2019
Subjects: Διαχείριση επιχειρηματικών διαδικασιών
Τυπική γλώσσα προγραμματισμού
Δημόσιος τομέας
Business process management
Domain specific language
Public Sector

description: Οι διαδικασίες αποτελούν τον κινητήριο μοχλό των οργανισμών ανεξαρτήτως του μεγέθους, του τύπου ή της ηλικίας του. Υπάρχουν διαδικασίες οι οποίες είναι ρητές, τυπικές και τεκμηριωμένες και κάποιες οι οποίες είναι άρρητες σε ανεπίσημη μορφή. Οι διαδικασίες είναι συνήθως πολύπλοκες και χρειάζεται η εις βάθος κατανόηση τους. Για αυτόν το λόγο, η Διαχείριση των Επιχειρηματικών Διαδικασιών είναι προτεραιότητα για τους οργανισμούς. Τα τελευταία χρόνια έχει σημειωθεί μεγάλη πρόοδος στην τεχνολογία η οποία σχετίζεται με αυτές και έχουν δημοσιευτεί πολλές έρευνες για την καταγραφή των παραγόντων επιτυχίας αυτών. Οι τυπικές γλώσσες προγραμματισμού είναι προγραμματιστικές γλώσσες οι οποίες σχεδιάζονται για να εφαρμοστούν σε συγκεκριμένα πεδία. Οι δυο αυτοί κλάδοι, σε συνδυασμό, μπορούν να αποτελέσουν ένα ισχυρό εργαλείο το οποίο θα διευκολύνει την αυτοματοποίηση των επιχειρηματικών διεργασιών. Είναι σημαντική η ολοκληρωμένη καταγραφή των επιχειρηματικών διαδικασιών, σε αποθετήρια γνώσης και στη συνέχεια να μοντελοποιηθούν. Η γλώσσα την οποία προτείνουμε να αναπτυχθεί, έχει εφαρμογή στο δημόσιο τομέα και σε αυτό θα δοθεί βάση. Κρίνεται απαραίτητη η ύπαρξη ολοκληρωμένης οντολογίας, η οποία θα αποτελέσει τη βάση για τη δημιουργία της γλώσσας. Τέλος παραθέτουμε την πρότασή μας για τη δημιουργία τυπικής γλώσσας προγραμματισμού για τις επιχειρηματικές διεργασίες του δημόσιου τομέα
description: Business processes are the driving force of organizations regardless of their size, type or age. There are some processes that are explicit, formal and well documented and others that are in tacit and informal form. Processes are usually complex and require deep knowledge to understand them. For this reason, Business process management is a priority for organizations worldwide. In recent years, great progress has been made in technology related to these and many studies have been published to record their success factors. Domain-Specific Languages are programming languages that are designed to be implemented in specific fields. These two sectors, combined, can be a powerful tool that will facilitate even more the possibilities that derive from the automation of business processes. It is important to integrate business processes into knowledge repositories and then model them. The language we propose to develop applies to the public sector and will be based on that. It is necessary to have an integrated ontology, which will be the basis for the creation of the language. Finally, we cite our proposal to create a formal programming language for business processes in the public sector
Μελέτη εμφάνισης και συνεμφάνισης όρων δεξιοτήτων σε αγγελίες πληροφορικής
Creators: name: Σουβατζόγλου, Κυριάκος Γεωργίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2019
Subjects: Εξόρυξη κειμένου
Δεξιότητες
Αγγελίες εργασίας
Text mining
Skills
Job advertisements

description: We are in the age of digitization and high quality services through the global web. This fact produces large volume data, where through proper management and processing we can draw valuable conclusions about the subject we are studying. In this respect, the labor market can not be an exception. There is now a plethora of websites with this subject. Both the ads and profiles of the candidates offer valuable material that can be extracted by appropriate mining and processing. In this paper we will study the soft skills we meet simultaneously in pairs and how often they appear in an ad through data mining. Also, based on a score, we will check whether the pair is something we expect to emerge or is surprising, based on the frequency of occurrence of the terms. The data source is the StackOverflow gateway and an analysis of ads in the IT sector is done. The analysis will be done using the programming language R and the libraries tm, textcat, dplyr. First of all, we will refer to data science and we will concentrate on mining. We will then refer to Hard Skills and Soft Skills. We will move on to the methodology by analyzing each stage of text mining. Finally we will analyze the results and we will refer to future research
description: Βρισκόμαστε στην εποχή της ψηφιοποίησης και της υψηλής ποιότητας υπηρεσιών μέσω του παγκόσμιου ιστού. Αυτό το γεγονός παράγει δεδομένα μεγάλου όγκου, όπου μέσω σωστής διαχείρισης και επεξεργασίας μπορούμε να αντλήσουμε πολύτιμα συμπεράσματα σχετικά με το αντικείμενο που μελετάμε. Από αυτή την άποψη, η αγορά εργασίας δεν μπορεί να αποτελεί εξαίρεση. Υπάρχει σήμερα μια πληθώρα ιστοσελίδων με αυτό το αντικείμενο. Τόσο οι αγγελίες όσο και τα προφίλ των υποψηφίων προσφέρουν πολύτιμο υλικό το οποίο μπορεί να εξαχθεί με κατάλληλη εξόρυξη και επεξεργασία. Σε αυτήν την εργασία θα μελετήσουμε ποιες είναι οι δεξιότητες που συναντάμε ταυτόχρονα σε ζεύγη και πόσο συχνά εμφανίζονται σε μια αγγελία μέσω της εξόρυξης δεδομένων. Επίσης βάσει ενός σκορ θα ελέγξουμε αν το ζεύγος είναι κάτι που περιμέναμε να προκύψει ή αποτελεί έκπληξη, βάσει των συχνοτήτων εμφάνισης των όρων. Η πηγή δεδομένων είναι η πύλη StackOverflow και γίνεται μια ανάλυση των αγγελιών στον τομέα της πληροφορικής. Η ανάλυση θα γίνει χρησιμοποιώντας την γλώσσα προγραμματισμού R και τις βιβλιοθήκες tm, textcat, dplyr. Πρώτα απ 'όλα, θα αναφερθούμε στην επιστήμη των δεδομένων και θα επικεντρωθούμε στην εξόρυξη. Στη συνέχεια θα αναφερθούμε στις Προγραμματιζόμενες Δεξιότητες και τις Διαπροσωπικές Δεξιότητες. Θα προχωρήσουμε στη μεθοδολογία αναλύοντας κάθε στάδιο της εξόρυξης. Τέλος θα αναλύσουμε τα αποτελέσματα και θα αναφερθούμε σε μελλοντική έρευνα
On the inertia group of elliptic curves in the Cremona group of the plane
Creators: name: Blanc, Jérémy
Publisher: name: arXiv
Year: 2007
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 14E05; 14E07; 14H52

description: We study the group of birational transformations of the plane that fix (each point of) a curve of geometric genus 1. A precise description of the finite elements is given; it is shown in particular that the order is at most 6, and that if the group contains a non-trivial torsion, the fixed curve is the image of a smooth cubic by a birational transformation of the plane. We show that for a smooth cubic, the group is generated by its elements of degree 3, and prove that it contains a free product of Z/2Z, indexed by the points of the curve.
description: 14 pages, no figure
Chemically-Localized Resonant Excitons in Silver-Pnictogen Halide Double Perovskites
Creators: name: Biega, Raisa-Ioana
name: Filip, Marina R.
name: Leppert, Linn
name: Neaton, Jeffrey B.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Halide double perovskites with alternating silver and pnictogen cations are an emerging family of photoabsorber materials with robust stability and band gaps in the visible range. However, the nature of optical excitations in these systems is not yet well understood, limiting their utility. Here, we use ab initio many-body perturbation theory within the $GW$ approximation and the Bethe-Salpeter equation approach to calculate the electronic structure and optical excitations of the double perovskite series Cs$_2$AgBX$_6$, with B=Bi$^{3+}$, Sb$^{3+}$, X = Br$^-$, Cl$^-$. We find that these materials exhibit strongly localized resonant excitons with energies from 170 to 434 meV below the direct band gap. In contrast to lead-based perovskites, the Cs$_2$AgBX$_6$ excitons are computed to be non-hydrogenic, with anisotropic effective masses and sensitive to local field effects, a consequence of their chemical heterogeneity. Our calculations demonstrate the limitations of the Wannier-Mott and Elliott models for this class of double perovskites and contribute to a detailed atomistic understanding of their light-matter interactions.
Γυναίκες μετανάστριες: η χαρτογράφηση απόψεων γυναικών από την Βουλγαρία και οι προτεινόμενες δράσεις καταπολέμησης των στερεοτύπων στο πλαίσιο της εκπαίδευσης
Creators: name: Κάλφα, Μαρία Κωνσταντίνου
Publisher: name: Aristotle University of Thessaloniki
Year: 2019
Subjects: Φύλο
Μετανάστευση
Εκπαίδευση
Gender
Migration
Education

description: Στο πλαίσιο της εν λόγω μεταπτυχιακής διερευνώνται οι απόψεις των γυναικών από την Βουλγαρία που διαμένουν στην Καβάλα σε σχέση με στερεότυπα που συνάντησαν και πως αυτά μπορούν να καταπολεμηθούν μέσα από την εκπαίδευση. Στόχος της έρευνας είναι να αναδείξει ζητήματα ένταξης που απασχόλησαν τις γυναίκες αυτές και πως η πολιτισμική τους ταυτότητα μπορεί να επηρέασε την ένταξη των παιδιών τους. Μέσα από την διπλωματική αυτή παρουσιάζεται μία σύντομη επισκόπηση του διαλόγου για το βιολογικό και το κοινωνικό φύλο, γίνεται αναφορά στην νοηματοδότηση της διαφοράς, στις αφηγήσεις περί ετερότητας και στην συγκρότηση του ‘Άλλου’ και αναλύεται το ζήτημα των ανθρώπινων δικαιωμάτων. Επιπλέον, επισημαίνονται οι δυσκολίες, τα εμπόδια και οι ιδιαιτερότητες της γυναικείας μετανάστευσης. Τέλος, διερευνώνται οι παράγοντες που πυροδοτούν την γυναικεία μετανάστευση, η φεμινιστική σκοπιά και οι αλλαγές που πραγματοποιήθηκαν στην έρευνα για την μετανάστευση κάνοντας ορατή την γυναικεία ταυτότητα και τη ‘θηλυκοποίηση της μετανάστευσης’
description: In the framework of this postgraduate study the views of women from Bulgaria living in Kavala are investigated in relation to stereotypes they met and how they can be combated through education. The aim of the survey is to highlight integration issues that have addressed these women and how their cultural identity may have influenced the integration of their children. This diploma thesis presents a brief overview of the dialogue on sex and gender, reference is made to the concept of difference, to the narratives about otherness and to the constitution of the "Other", and the human rights issue is analyzed also. In addition, the difficulties, barriers and specificities of female immigration are highlighted. In the end, the factors that trigger female immigration, the feminist viewpoint and the changes that have taken place in immigration research are being explored, making women's identity visible and feminisation of immigration
Gravitational Microlensing
Creators: name: Wambsganss, Joachim
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: This review forms the microlensing part of the 33rd Saas-Fee Advanced Course "Gravitational Lensing: Strong, Weak & Micro'', which was held in April 2003 in Les Diablerets. It contains an introduction to the lensing effects of single and binary stars and it summarizes the state-of-the-art of microlensing observations and prospects at the time of the meeting. Stellar microlensing as well as quasar microlensing are covered.
description: 93 pages, 51 figures; to appear (April 2006) in: Kochanek, C.S., Schneider, P., Wambsganss, J.: "Gravitational Lensing: Strong, Weak & Micro", Proceedings of the 33rd Saas-Fee Advanced Course; G. Meylan, P. Jetzer, P. North, eds. (Springer-Verlag, Heidelberg); pp. 457
Ο Γενικός Κανονισμός Προστασίας προσωπικών δεδομένων Και Προετοιμασία και Εφαρμογή του από τα Κέντρα Κοινωνικής Προνοίας
Creators: name: Ευφραιμίδης, Ιωάννης Χρήστου
Publisher: name: Aristotle University of Thessaloniki
Year: 2019
Subjects: Γενικός κανονισμός προστασίας προσωπικών δεδομένων
Κέντρα κοινωνικής πρόνοιας
Ευαίσθητα προσωπικά δεδομένα
General data protection regulation
Social welfare centers
Sensitive personal data

description: Η εξέλιξη που έχει επιτευχθεί τα τελευταία χρόνια στην ταχύτητα μετάδοσης και επεξεργασίας των δεδομένων αλλά και η επιθυμία του Ευρωπαίου νομοθέτη να δημιουργήσει ένα ενιαίο νομοθετικό πλαίσιο για όλη την ενιαία αγορά, για την επεξεργασία των προσωπικών δεδομένων οδήγησε είκοσι χρόνια μετά την οδηγία 95/46/ΕΚ στην ψήφιση του Κανονισμού 679/2016/ΕΕ για την προστασία των προσωπικών δεδομένων. Το θεμελιώδες δικαίωμα της προστασίας των ατόμων από την επεξεργασία των προσωπικών τους δεδομένων απορρέει από τον Χάρτη των θεμελιωδών δικαιωμάτων της ΕΕ όσο και από την συνθήκη της λειτουργίας της ίδιας της ΕΕ, οπού ορίζεται ότι κάθε πρόσωπο έχει δικαίωμα στην προστασία των δεδομένων προσωπικού χαρακτήρα που το αφορούν. Ο «κανονισμός» ως νομοθετικό μέσο είναι δεσμευτικός και ισχύει άμεσα σε κάθε κράτος μέλος της ΕΕ, και δεν απαιτείται ειδική προσαρμογή της Εθνικής Νομοθεσίας, από τον κανονισμό ορίζονται κάποια μικρά περιθώρια τα οποία μπορεί να καθορίζονται από την εθνική νομοθεσία π.χ. το όριο ηλικίας συναίνεσης των παιδιών. Στόχος της παρούσας διπλωματικής εργασίας αποτελεί η παρουσίαση του γενικού κανονισμού ασφάλειας για την προστασία των δεδομένων 679/2016/ΕΕ και ποιες θα πρέπει να είναι οι απαραίτητες δράσεις των Κ.Κ.Π (Κέντρα Κοινωνικής Πρόνοιας ) ώστε να συμμορφωθούν προς τον κανονισμό
description: The progress made in recent years on the speed of transmission and processing of data and the desire of the European legislator to create a single legislative framework for the whole single market for the processing of personal data resulted in twenty years after Directive 95 / EC to the adoption of Regulation 679/2016 / EU on the protection of personal data. The fundamental right to the protection of individuals from the processing of their personal data derives from the Charter of Fundamental Rights of the EU and from the Treaty on the Functioning of the EU itself, which states that every person has the right to the protection of personal data concern. The "regulation" as a legislative instrument is binding and directly applicable in every EU Member State, and no specific adaptation of the national legislation is required; some small margins are defined by the regulation, which may be defined by national legislation e.g. the age limit consensus of children. The purpose of this diploma thesis is to present the General Data Protection Regulation 679/2016 / EU and what should be the necessary actions of the Centers of Social Welfare in order to comply with Regulation
Predictions of Alpha Decay Half lives of Heavy and Superheavy Elements
Creators: name: Samanta, C.
name: Chowdhury, P. Roy
name: Basu, D. N.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Nuclear Theory (nucl-th)
subject: Astrophysics (astro-ph)
subject: Nuclear Experiment (nucl-ex)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Theoretical estimates for the lifetimes of several isotopes of heavy elements with Z=102-120 are presented by calculating the quantum mechanical tunneling probability in a WKB framework and using microscopic nucleus-nucleus potential obtained by folding the densities of interacting nuclei with the DDM3Y effective nuclear interaction. The $α$-decay half lives calculated in this formalism using the experimental $Q$-values are in good agreement over a wide range of experimental data. Half lives are also calculated using $Q$-values extracted from two mass formulae. The Viola-Seaborg-Sobiczewski (VSS) estimates of $α$-decay half lives with the same $Q$-values are presented for comparison. The half life calculations are found to be quite sensitive to the choice of $Q$-values. Comparison with the experimental data delineates the inadequacies of older mass predictions in the domain of heavy and superheavy elements as compared to the newer one by Muntian-Hofmann-Patyk-Sobiczewski, and highlights necessity of a more accurate mass formula which can predict $Q$-values with even higher precision.
description: 18 pages including 5 figures and 1 table
A new measure of quantitative robustness
Creators: name: Mazzi, Sonia V. T
Publisher: name: University of British Columbia
Year: 2009

description: The Gross-Error Sensitivity (GES) and the Breakdown Point (BP) are two measures of quantitative robustness which have played a key role in the development of the theory of robust-ness. Both can be derived from the maximum bias function B(€) and constitute a two-number summary of this function. The GES is the derivative of B(€) at the origin whereas the BP determines the asymptote of the curve (c, B(€)). Since GES€ ≈ B(€) for € near zero, the GES summarizes the behavior of B(€) near the origin. On the other hand, the BP does not provide an approximation for B(€) for c large and, consequently, estimates with strikingly different bias performance when c is large may have the same BP. A new robustness quantifier, the breakdown rate (BR), that summarizes the behavior of B(€)for € near BP will be introduced. The BR for several families of robust estimates of regression will be presented and the increased usefulness of the three-number summary (GES,BP,BR) for comparing robust estimates will be illustrated by several examples.
Case study: calculation of a narrow resonance with the LIT method
Creators: name: Leidemann, W.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The possibility to resolve narrow structures in reaction cross sections in calculations with the Lorentz integral transform (LIT) method is studied. To this end we consider a fictitious two-nucleon problem with a low-lying and narrow resonance in the $^3P_1$ nucleon-nucleon partial wave and calculate the corresponding ``deuteron photoabsorption cross section''. In the LIT method the use of continuum wave functions is avoided and one works instead with a localized function \tildeΨ. In this case study it is investigated how far into the asymptotic region \tildeΨhas to be determined in order to obtain a precise resolution of the artificially introduced E1 resonance. Comparing with the results of a conventional calculation with explicit neutron-proton continuum wave functions it is shown that the LIT approach leads to an excellent reproduction of the cross section in the resonance region and of further finer cross section details at higher energies. To this end, however, for \tildeΨone has to take into account two-nucleon distances up to at least 30 fm.
description: 18 pages, 11 figures
Exergy-based modeling framework for hybrid and electric ground vehicles
Creators: name: Dettù, Federico
name: Pozzato, Gabriele
name: Rizzo, Denise M.
name: Onori, Simona
Publisher: name: arXiv
Year: 2021
Subjects: subject: Systems and Control (eess.SY)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Exergy, or availability, is a thermodynamic concept representing the useful work that can be extracted from a system evolving from a given state to a reference state. It is also a system metric, formulated from the first and the second law of thermodynamics, encompassing the interactions between subsystems and the resulting entropy generation. In this paper, an exergy-based analysis for ground vehicles is proposed. The study, a first to the authors' knowledge, defines a comprehensive vehicle and powertrain-level modeling framework to quantify exergy transfer and destruction phenomena for the vehicle's longitudinal dynamics and its energy storage and conversion devices (namely, electrochemical energy storage, electric motor, and ICE). To show the capabilities of the proposed model in quantifying, locating, and ranking the sources of exergy losses, two case studies based on an electric vehicle and a parallel hybrid electric vehicle are analyzed considering a real-world driving cycle. This modeling framework can serve as a tool for the future development of ground vehicles management strategies aimed at minimizing exergy losses rather than fuel consumption.
The puzzling abundance pattern of HD134439 and HD134440
Creators: name: Chen, Y. Q.
name: Zhao, G.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Abundances of 18 elements are determined for the common proper-motion pair, HD134439 and HD134440, which shows high [Mn/Fe] and low [α/Fe] ratios as compared to normal halo stars. Moreover, puzzling abundances are indicated from elements whose origins are normally considered to be from the same nucleosynthesis history. Particularly, we have found that [Mg/Fe] and [Si/Fe] are lower than [Ca/Fe] and [Ti/Fe] by 0.1-0.3 dex. When elemental abundances are interpreted in term of their condensation temperatures (Tc), obvious trends of [X/Fe] vs. Tc for alpha elements and probably iron-peak elements as well are shown. The hypothesis that these stars have formed from a dusty environment in dSph galaxy provides a solution to the puzzling abundance pattern.
description: 13 pages,5 figures, MN, in press
Progress in developing a hybrid deep learning algorithm for identifying and locating primary vertices
Creators: name: Akar, Simon
name: Atluri, Gowtham
name: Boettcher, Thomas
name: Peters, Michael
name: Schreiner, Henry
name: Sokoloff, Michael
name: Stahl, Marian
name: Tepe, William
name: Weisser, Constantin
name: Williams, Mike
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: FOS: Physical sciences

description: The locations of proton-proton collision points in LHC experiments are called primary vertices (PVs). Preliminary results of a hybrid deep learning algorithm for identifying and locating these, targeting the Run 3 incarnation of LHCb, have been described at conferences in 2019 and 2020. In the past year we have made significant progress in a variety of related areas. Using two newer Kernel Density Estimators (KDEs) as input feature sets improves the fidelity of the models, as does using full LHCb simulation rather than the "toy Monte Carlo" originally (and still) used to develop models. We have also built a deep learning model to calculate the KDEs from track information. Connecting a tracks-to-KDE model to a KDE-to-hists model used to find PVs provides a proof-of-concept that a single deep learning model can use track information to find PVs with high efficiency and high fidelity. We have studied a variety of models systematically to understand how variations in their architectures affect performance. While the studies reported here are specific to the LHCb geometry and operating conditions, the results suggest that the same approach could be used by the ATLAS and CMS experiments.
Ο αποκλεισμός των διαφημίσεων στο διαδίκτυο
Creators: name: Βαχαρακίδης, Ιωάννης Δημητρίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2019
Subjects: Ο αποκλεισμός των διαφημίσεων
Adblocking

description: Η παρούσα μελέτη έχει ως σκοπό να διερευνήσει τον αποκλεισμό των διαφημίσεων στο διαδίκτυο. Αρχικά, θα αναφέρει κάποια γενικά στοιχεία για τη διαφήμιση, τον ρόλο που έχει σήμερα, τα χαρακτηριστικά της και θα αναλυθούν τα μέσα που την προβάλλουν. Στη συνέχεια, θα προσδιοριστεί ο ορισμός της διαδικτυακής διαφήμισης, θα αναλυθούν τα είδη της και θα αναφερθούν τα οφέλη και τα μειονεκτήματά της. Έναν πολύ σημαντικό ρόλο στη διαφήμιση παίζουν τα μέσα κοινωνικής δικτύωσης, όπου μέσα από αυτά ανθίζει η διαφήμιση, γιατί είναι προσανατολισμένη στον άνθρωπο. Λίγο αργότερα, θα αποσαφηνιστεί ο ορισμός του αποκλεισμού των διαφημίσεων, θα εξεταστεί ο σκοπός του και θα αναπτυχθούν διάφορα εργαλεία και τεχνικές που θα βοηθήσουν τον χρήστη στην αποφυγή απόσπασης της προσοχής του. Τέλος, θα αναλυθούν τα αποτελέσματα του ερωτηματολογίου που διενεργήθηκε στα πλαίσια της έρευνας. Το βασικό συμπέρασμα που προκύπτει με βάση τα αποτελέσματα είναι ότι οι καταναλωτές αποφεύγουν όλο και περισσότερο την διαφήμιση χρησιμοποιώντας διάφορες εφαρμογές αποκλεισμού. Επομένως, αυτό επηρεάζει σημαντικά το μέλλον του διαδικτύου και κυρίως των επιχειρήσεων που προβάλλονται μέσα από αυτό, γιατί έρχονται αντιμέτωποι με τις οικονομικές δυσκολίες, αφού δεν θα μπορούν για πολύ χρόνο ακόμα να παρέχουν δωρεάν υπηρεσίες στους χρήστες
description: The purpose of this study is to investigate the exclusion of ads in Internet. Initially, it will provide some general information about advertising, the role it has today, the features which will be analyzed and the means that promote will be analyzed. Next, the definition of online advertising will be defined, its types analyzed, and its benefits and disadvantages reported. A very important role in advertising is played by social media, where advertising is thriving because it is human-oriented. Shortly thereafter, the definition of ad exclusion will be clarified, its purpose will be examined and various tools and techniques will be developed to help the user avoid distracting. Finally, the results of the research questionnaire will be analyzed. The key conclusion based on the results is that consumers are increasingly avoiding advertising using various blockchain applications. Therefore, this has a major impact on the future of the internet, and especially on the businesses running through it, as they are facing financial difficulties as they will not be able to provide free services to users for a long time
КОРРЕКЦИЯ ЭНДОТОКСИКОЗА С ПОМОЩЬЮ ПРЕПАРАТА «ПОЛИСОРБ» В РАМКАХ КОМПЛЕКСНОЙ ТЕРАПИИ ПАЦИЕНТОВ С ХРОНИЧЕСКОЙ БОЛЕЗНЬЮ ПОЧЕК III СТАДИИ
Creators: name: Шарипова, Н.С.
Publisher: name: Zenodo
Year: 2024

description: Цель данного исследования заключается в сравнительном анализе эффективности препарата «Полисорб» у пациентов с хронической болезнью почек III стадии.
Ion pick-up by finite amplitude parallel propagating Alfvén wave
Creators: name: Li, X.
name: Lu, Q. M.
name: Li, B.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Two scenarios of possible ion heating due to finite amplitude parallel propagating Alfvén waves in the solar atmosphere are investigated using a 1D test particle approach. 1. An finite amplitude Alfvén wave is instantly introduced into a plasma (or equivalently, new ions are instantly created). 2. New ions are constantly created. In both scenarios, ions will be picked up by the Alfvén wave. In case 1, the wave scatters ions in the transverse direction leading to a randomization (or heating) process. This process is complete when a phase shift of $\pm π$ in the ion gyro-speed is produced between particles with characteristic parallel thermal speed and particles with zero parallel speed. This corresponds to $t={π\over k v_{th}}$ ($k$ is the wave number and $v_{th}$ is the ion thermal speed). A ring velocity distribution can be produced for large wave amplitude. The process yields a mass-proportional heating in the transverse direction, a temperature anisotropy and a bulk flow along the background magnetic field. In case 2, continuous ion creation represents a continuing phase shift in the ion gyro-speed leading to heating. New particles are picked up by the Alfvén wave within one ion gyroperiod. It is speculated that the mechanism may operate in the chromosphere and active regions where transient events may generate finite amplitude Alfvén waves.
Local Active Galactic Nuclei with Large Broad-Hα Variability Reside in Red Galaxies
Creators: name: Liu, Wen-Juan
name: Lira, Paulina
name: Yao, Su
name: Xu, Dawei
name: Wang, Jing
name: Dong, Xiao-Bo
name: Martínez-Palomera, Jorge
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Inspired by our serendipitous discovery of six AGNs with varying broad-Halpha fluxes over years out of our searching for intermediate-mass black holes (IMBHs), we conduct a systematic investigation of changing-look (CL) and large-variability AGNs. We collect all the CL AGNs at z<0.15 and the reverberation mapped AGNs with strongly variable broad Halpha, and perform careful decomposition fittings to both their images and spectra. We find two observational facts: (1) The host galaxies of local CL and large-variability AGNs, mainly being Seyferts, are in the red (gas-poor) tail of the general Seyfert galaxy population. (2) In contrast, there is a significant trend that their more luminous counterparts namely CL and extremely variable quasars (CLQs and EVQs) are different: CLQs are generally in blue galaxies; in terms of the diagram of SFR and M* local CL Seyfert galaxies are located in the green valley, whereas CLQ hosts are in the star-forming main sequence. We propose explanations for those strongly variable Seyferts and quasars, respectively, under the thought that accretion disks broadly depend on nuclear fueling modes. Local large-variability and CL Seyferts are in nuclear famine mode, where cold-gas clumps can be formed stochastically in the fueling flow, and their episodic infall produces sharp peaks in the accretion-rate curve. CLQs and EVQs are in feast fueling mode, which may account for both their preference to blue galaxies and their variability pattern (high-amplitude tail of the continuous distribution). Lastly, we propose a new thinking: to search for IMBHs by optical variability in red galaxies.
description: 37 pages(incl. Appendix), 10 figures, and 5 tables. Published in ApJ. (v2)Text changed to match the published version
Η παραβίαση της επαγγελματικής εχεμύθειας
Creators: name: Τσαμουρίδου, Σόνια Εντουαρντ
Publisher: name: Aristotle University of Thessaloniki
Year: 2019
Subjects: εχεμύθεια
απόρρητο
εμπιστοσύνη
confidentiality
privacy
trust

description: Σκοπός της εργασίας ήταν η μελέτη της παραβίασης επαγγελματικής εχεμύθειας υπό τη μορφή του ποινικού αδικήματος, όπως αυτή αποτυπώνεται στο άρθρο 371 του Ποινικού Κώδικα. Εξετάσθηκε το προστατευόμενο έννομο αγαθό της διάταξης καθώς και η έννοια του απορρήτου. Εξετάσθηκε στη συνέχεια ειδικότερα η διάταξη του άρθρου 371 Π.Κ. και δη η αντικειμενική και υποκειμενική υπόσταση του αδικήματος, τα ενεργητικά υποκείμενα αυτού, οι περιπτώσεις απόπειρας και συμμετοχής στο αδίκημα, καθώς και η συρροή αυτού με άλλες διατάξεις. Ιδιαίτερη έμφαση δόθηκε στις περιπτώσεις άρσης του άδικου χαρακτήρα της πράξης και στη σχέση του ιατρικού απορρήτου με την προστασία των προσωπικών δεδομένων του Ν. 2472/1997. Τέλος εξετάσθηκαν δικονομικά ζητήματα, όπως ο τρόπος δίωξης του αδικήματος και οι περιπτώσεις ακύρωσης της διαδικασίας ενώπιον ποινικών και πολιτικών Δικαστηρίων λόγω εξέτασης των περιοριστικά αναφερόμενων στις σχετικές διατάξεις προσώπων
description: The purpose of the thesis was to study the breach of professional secrecy in the form of a criminal offense, as reflected in Article 371 of the Criminal Code. The protected legal good of the provision and the concept of confidentiality were examined. Subsequently, we examined the provision of article 371 C.C. in particular, namely the objective and subjective nature of the offense, its active subjects, the cases of attempt and participation in the offense, as well as its influx of other offenses. Particular emphasis was placed on cases of obviation of the unfair nature of the act and the association of medical confidentiality with the protection of personal data of Law 2472/1997. Finally, procedural issues were examined, such as the way in which the offense is prosecuted and the cases in which criminal proceedings before civil and criminal courts are annulled, due to the examination of the persons mentioned in the relevant provisions
Ανάλυση επιχειρηματικών δεδομένων: πρόβλεψη ζήτησης με μοντέλα χρονοσειρών και τεχνιτά νευρωνικά δίκτυα
Creators: name: Κοσταλλάρι, Κρίστι Νικολάκ
Publisher: name: Aristotle University of Thessaloniki
Year: 2019
Subjects: τεχνητά νευρωνικά δίκτυα
χρονοσειρές
πρόβλεψη ζήτησης
artificial neural networks
time series
demand forecast

description: Η ευρεία εξάπλωση του Διαδικτύου σε συνδυασμό με την εξέλιξη της τεχνολογίας πληροφοριών δημιουργούν ένα πολύ ανταγωνιστικό περιβάλλον για κάθε επιχείρηση όπου η αξιοποίηση των κατάλληλων δεδομένων μπορεί να καθορίσει σημαντικά την μελλοντική της επιτυχία. Στο περιβάλλον αυτό οι εταιρίες καλούνται να ανταποκρίνονται άμεσα στις συνεχείς αλλαγές του, να είναι σε θέση να πραγματοποιούν ακριβείς προβλέψεις ώστε να μην έχουν απώλειες και να ικανοποιήσουν τις απαιτήσεις των πελατών τους. Καθοριστικό ρόλο στη λήψη σωστών αποφάσεων παίζει η επιχειρηματική ευφυΐαη οποία παρέχει μια πληθώρα εργαλείων που βοηθάνε τις επιχειρήσεις να αναλύσουν και να επεξεργαστούν δεδομένα με σκοπό τη δημιουργία χρήσιμων πληροφοριών. Η εξόρυξη γνώσης είναι η διαδικασία μετατροπής των δεδομένων σε αξιοποιήσιμες πληροφορίες. Σημαντικό ρόλο στη διαδικασία αυτή παίζει η μηχανική μάθηση όπου οι υπολογιστικές μηχανές “εκπαιδεύονται” ώστε να βοηθήσουν στην κατασκευή μοντέλων ή προτύπων. Σκοπός της παρούσας εργασίας είναι η κατασκευή μοντέλων πρόβλεψης με μοντέλα χρονοσειρών και μηχανικής μάθησης (τεχνητά νευρωνικά δίκτυα) από πραγματικά δεδομένα και η σύγκριση μεταξύ τους μέσω του λογισμικού SPSS
description: The widespread deployment of the Internet combined with the evolution of information technology creates a very competitive environment for any business, where the exploitation of the appropriate data could determine its future success. In this environment, companies need to respond quickly to the constant changes, to be able to make accurate forecasts in order to avoid losses and to meet the demands of their customers. Business intelligence plays a crucial role in making the correct decisions, providing a plethora of tools which help businesses analyze and process data to generate useful information. Knowledge (data) mining is the process of converting data into meaningful information. Machine learning, which is the “training” of machines to help in modeling, has a crucial role in this process. The purpose of the current thesis is the construction of prediction models based on time series models and machine learning (artificial neural networks) from real data and their comparison using the SPSS software
ELSKE: Efficient Large-Scale Keyphrase Extraction
Creators: name: Knittel, Johannes
name: Koch, Steffen
name: Ertl, Thomas
Publisher: name: arXiv
Year: 2021
Subjects: subject: Information Retrieval (cs.IR)
subject: FOS: Computer and information sciences

description: Keyphrase extraction methods can provide insights into large collections of documents such as social media posts. Existing methods, however, are less suited for the real-time analysis of streaming data, because they are computationally too expensive or require restrictive constraints regarding the structure of keyphrases. We propose an efficient approach to extract keyphrases from large document collections and show that the method also performs competitively on individual documents.
The history of the Vancouver Little Theatre Association
Creators: name: Nesbitt, Carol Dell
Publisher: name: University of British Columbia
Year: 2009

description: The thesis covers the history of the Vancouver Little Theatre Association (VLTA), one of the oldest amateur theatre groups in Canada. The subject was chosen partly because of the shortage of informative papers written on the histories of amateur theatre in Vancouver. As there has been very little written on this subject, the majority of the research was done with primary sources, most of which were in the VLTA archival collection at the City of Vancouver Archives. The VLTA was founded in 1921 by a group of people inspired by the art theatre movement in Europe. The Association proved to be very popular from its inception, and was able to buy a theatre building by its third season. The building was its home base until 1978. The Depression at the end of the 1920s dramatically affected the VLTA, and the company, once financially successful and widely accepted, lost much of its stability and following. From then on, most of the history of the VLTA is a struggle for survival. During the Second World War, the Association helped with the war effort, either by raising money for war charities or by giving performances for servicemen. At the end of the war, professional theatre began to emerge in Vancouver, and the VLTA had much competition. This early professionalism led to the building of Vancouver’s civic theatres in the late 1950s and early 1960s, as well as the founding of smaller, alternative, professional theatre companies of the 1970s. The Little Theatre found that it could not compete with these new movements. The Association’s position in the Vancouver theatre scene was forced to change. The Introduction presents a brief overview of the theatrical ongoings in Vancouver before the inception of VLTA, as well as the reasons behind the creation of the Little Theatre. Chapters Two to Five cover the main part of VLTA’s history, from its inception in 1921 to the selling of the York Theatre building in 1978. Chapter Six brings up to date the rest of VLTA’s history and discusses whether the VLTA succeeded in its original mandates. It also considers why VLTA remained amateur, while other little theatres in Canada turned professional. The thesis will cover the internal workings of VLTA as a company, and its position in the Vancouver Theatre scene in comparison to other theatrical happenings in the city.
Strictly localized states in the octagonal Ammann-Beenker quasicrystal
Creators: name: Oktel, M. Ö.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: Ammann-Beenker lattice is a two-dimensional quasicrystal with eight-fold symmetry, which can be described as a projection of a cut from a four-dimensional simple cubic lattice. We consider the vertex tight-binding model on this lattice and investigate the strictly localized states at the center of the spectrum. We use a numerical method based on the generation of finite lattices around a given perpendicular space point and QR decomposition of the Hamiltonian to count the strictly localized states. We apply this method to count the frequency of localized states in lattices of up to 100 000 sites. We obtain an orthogonal set of compact localized states by diagonalizing the position operator projected onto the manifold spanned by the zero energy states. We identify twenty localized state types and calculate their exact frequencies through their perpendicular space images. Unlike the Penrose lattice, all the localized state types are eight-fold symmetric around an eight edge vertex, and all vertex types can support localized states. The total frequency of these twenty types gives a lower bound of $f_{LS}=30796-21776\sqrt{2} \simeq 0.08547$ for the fraction of strictly localized states in the spectrum. This value is in agreement with the numerical calculation and very close to the recently conjectured exact fraction of localized states $f_{Ex}=3/2-\sqrt{2}\simeq 0.08579$.
A Meta-model for Process Failure Mode and Effects Analysis (PFMEA)
Creators: name: Hoefig, Kai
name: Klein, Cornel
name: Rothbauer, Stefan
name: Zeller, Marc
name: Vorderer, Marian
name: Koo, Chee Hung
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computers and Society (cs.CY)
subject: FOS: Computer and information sciences

description: Short product lifecycles and a high variety of products force industrial manufacturing processes to change frequently. Due to the manual approach of many quality analysis techniques, they can significantly slow down adaption processes of production systems or make production unprofitable. Therefore, automating them can be a key technology for keeping pace with market demand of the future. The methodology presented here aims at a meta-model supporting automation for PFMEA. The method differentiates product requirements, production steps and quality measures in such a way, that complex quality requirements can be addressed in any instance of a factory using a common meta-modeling language.
description: arXiv admin note: text overlap with arXiv:2105.14817
Atomic-scale insights into electro-steric substitutional chemistry of cerium oxide
Creators: name: Zhang, Haiwu
name: Castelli, Ivano E.
name: Santucci, Simone
name: Sanna, Simone
name: Pryds, Nini
name: Esposito, Vincenzo
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Cerium oxide (ceria, CeO2) is one of the most promising mixed ionic and electronic conducting materials. Previous atomistic analysis has covered widely the effects of substitution on oxygen vacancy migration. However, an in-depth analysis of the role of cation substitution beyond trivalent cations has rarely been explored. Here, we investigate soluble monovalent, divalent, trivalent and tetravalent cation substituents. By combining classical simulations and quantum mechanical calculations, we provide an insight into defect association energies between substituent cations and oxygen vacancies as well as their effects on the diffusion mechanisms. Our simulations indicate that oxygen ionic diffusivity of subvalent cation-substituted systems follows the order Gd>Ca>Na. With the same charge, a larger size mismatch with Ce cation yields a lower oxygen ionic diffusivity, i.e., Na>K, Ca>Ni, Gd>Al. Based on these trends, we identify species that could tune the oxygen ionic diffusivity: we estimate that the optimum oxygen vacancy concentration for achieving fast oxygen ionic transport is 2.5% for GdxCe1-xO2-x/2, CaxCe1-xO2-x and NaxCe1-xO2-3x/2 at 800 K. Remarkably, such a concentration is not constant and shifts gradually to higher values as the temperature is increased. We find that co-substitutions can enhance the impact of the single substitutions beyond that expected by their simple addition. Furthermore, we identify preferential oxygen ion migration pathways, which illustrate the electro-steric effects of substituent cations in determining the energy barrier of oxygen ion migration. Such fundamental insights into the factors that govern the oxygen diffusion coefficient and migration energy would enable design criteria to be defined for tuning the ionic properties of the material, e.g., by co-doping.
Comparative verb morphology in Pomo
Creators: name: Oswalt, Robert L.
name: Oswalt Family
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2021
Subjects: subject: kju
subject: poo
subject: pej
subject: peb
subject: pom
subject: pef

description: Photocopy of handout with originals and handwritten notes. See also Oswalt.004.026, Oswalt.024.027, and Oswalt.024.048.