cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Determination of the corrosion progress of zirconium oxide containing refractories based on the natural intrinsic gamma radiation of the material
Creators: name: Fleischmann, Bernhard
name: Baumann, Patrick
name: Mergler, Kurt Wilhelm
Publisher: name: Offenbach : Verlag der Deutschen Glastechnischen Gesellschaft
Year: 2001
Subjects: subject: 660

description: The determination of the corrosion progress of refractory blocks is interesting for the operation of glass furnace tanks under safety and economic aspects. The measuring principle, based on the very small natural radiation of impurities of the zirconium raw materials for refractory production, has been known since the beginning of the seventies of the last century and could now be developed through improvements of measuring technology and sensors. Smaller changes to a laboratory test setup from medical technology were made both in the hardware and the software, to enable measurements of the intrinsie radiation of fused-cast AZS refractory materials in hot and dusty environment on glass melting furnaces during operation. Α measuring schedule was developed and calibrating measurements were carried out with blocks of different zirconia content. First practical tests were made on cold glass furnaces. The final adaptation of the equipment was done with measurements on operating glass furnaces. The measurements of the corrosion progress and/or the residual thickness of refractory blocks based on the natural intrinsic gamma radiation could be done with the expected accuracy and can be used to support the operator of glass melting tanks.
Low-frequency vibrational spectrum of mean-field disordered systems
Creators: name: Bouchbinder, Eran
name: Lerner, Edan
name: Rainone, Corrado
name: Urbani, Pierfrancesco
name: Zamponi, Francesco
Publisher: name: arXiv
Year: 2020
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We study a recently introduced and exactly solvable mean-field model for the density of vibrational states $\mathcal{D}(ω)$ of a structurally disordered system. The model is formulated as a collection of disordered anharmonic oscillators, with random stiffness $κ$ drawn from a distribution $p(κ)$, subjected to a constant field $h$ and interacting bilinearly with a coupling of strength $J$. We investigate the vibrational properties of its ground state at zero temperature. When $p(κ)$ is gapped, the emergent $\mathcal{D}(ω)$ is also gapped, for small $J$. Upon increasing $J$, the gap vanishes on a critical line in the $(h,J)$ phase diagram, whereupon replica symmetry is broken. At small $h$, the form of this pseudogap is quadratic, $\mathcal{D}(ω)\simω^2$, and its modes are delocalized, as expected from previously investigated mean-field spin glass models. However, we determine that for large enough $h$, a quartic pseudogap $\mathcal{D}(ω)\simω^4$, populated by localized modes, emerges, the two regimes being separated by a special point on the critical line. We thus uncover that mean-field disordered systems can generically display both a quadratic-delocalized and a quartic-localized spectrum at the glass transition.
description: 18 pages, 3 figures
Structurization of a partially crystalline melt by a stationary ultrasonic wave
Creators: name: Gerlach, Sandra
name: Rüssel, Christian
name: Avramov, Isaak
Publisher: name: Offenbach : Verlag der Deutschen Glastechnischen Gesellschaft
Year: 2001
Subjects: subject: 660

description: At a partially crystalline melt composed by a lead borate glass and crystalline SnO2, a stationary ultrasonic wave was attached at a temperature of 600 °C. This led to an accumulation of the SnO2 particles at the pressure nodes. After cooling the melt, a layered structure was obtained. The effect of the particle size upon the particle distribution is shown. The movement of the particles in the stationary ultrasonic wave is described by a differential equation which is numerically solved. Results of the numeric simulation are compared with experimental results and discussed.
Die katholische Soziallehre und der Geist des Kapitalismus. Eine Betrachtung der ersten Sozialenzykliken im Kontext der Deutschen Historischen Schule
Creators: name: Ebner, Alexander
Publisher: name: UB Tübingen
Year: 2015

description: Die ersten beiden päpstlichen Sozialenzykliken »Rerum Novarum« (1891) und
 »Quadragesimo Anno« (1931) befassen sich mit den Grundproblemen wirt-
 schaftlichen und sozialen Wandels im historischen Kontext der Herausbildung
 des modernen industriellen Kapitalismus. Derselbe historische Kontext prägt
 auch die intellektuelle Blütezeit der Deutschen Historischen Schule. Vor die-
 sem Hintergrund unternimmt der vorliegende Text eine Bewertung des Kapi-
 talismusverständnisses der Sozialenzykliken im Zusammenhang mit den theo-
 retischen Positionen der Deutschen Historischen Schule, wobei vor allem die
 Positionen Gustav von Schmollers und Werner Sombarts behandelt werden.
 Im Ergebnis wird deutlich, dass das Kapitalismusverständnis der ersten Sozial-
 enzykliken maßgebliche Parallelen mit den Perspektiven der Historischen Schu-
 le aufweist.

 The first two social encyclicals «Rerum Novarum» (1891) and «Quadragesimo
 Anno» (1931) are concerned with the basic problems of economic and social
 change in the historical context of the emergence of modern industrial capitalism.
 The same historical context also shapes the intellectual high tide of the German
 Historical School. On the basis of this background, the following essay aims at an
 assessment of the conceptualization of capitalism in the social encyclicals with a
 view on the theoretical positions of the German Historical School. Special con-
 sideration is given to the positions of Gustav von Schmoller and Werner Sombart.
 In conclusion, it is outlined that the understanding of capitalism in the first social
 encyclicals exhibits major parallels with the perspectives of the Historical School.
description: Ethik und Gesellschaft, 2011: Sonderheft 2011 Arbeit – Eigentum – Kapital. Zur Kapitalismuskritik der großen Sozialenzykliken
A simulation-based evaluation of a Cargo-Hitching service for E-commerce using mobility-on-demand vehicles
Creators: name: Alho, Andre
name: Sakai, Takanori
name: Oh, Simon
name: Cheng, Cheng
name: Seshadri, Ravi
name: Chong, Wen Han
name: Hara, Yusuke
name: Caravias, Julia
name: Cheah, Lynette
name: Ben-Akiva, Moshe
Publisher: name: arXiv
Year: 2020
Subjects: subject: Multiagent Systems (cs.MA)
subject: Systems and Control (eess.SY)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Time-sensitive parcel deliveries, shipments requested for delivery in a day or less, are an increasingly important research subject. It is challenging to deal with these deliveries from a carrier perspective since it entails additional planning constraints, preventing an efficient consolidation of deliveries which is possible when demand is well known in advance. Furthermore, such time-sensitive deliveries are requested to a wider spatial scope than retail centers, including homes and offices. Therefore, an increase in such deliveries is considered to exacerbate negative externalities such as congestion and emissions. One of the solutions is to leverage spare capacity in passenger transport modes. This concept is often denominated as cargo-hitching. While there are various possible system designs, it is crucial that such solution does not deteriorate the quality of service of passenger trips. This research aims to evaluate the use of Mobility-On-Demand services to perform same-day parcel deliveries. For this purpose, we use SimMobility, a high-resolution agent-based simulation platform of passenger and freight flows, applied in Singapore. E-commerce demand carrier data are used to characterize simulated parcel delivery demand. Operational scenarios that aim to minimize the adverse effect of fulfilling deliveries with Mobility-On-Demand vehicles on Mobility-On-Demand passenger flows (fulfillment, wait and travel times) are explored. Results indicate that the Mobility-On-Demand services have potential to fulfill a considerable amount of parcel deliveries and decrease freight vehicle traffic and total vehicle-kilometers-travelled without compromising the quality of Mobility On-Demand for passenger travel.
description: 19 pages, 4 tables, 7 figures. Submitted to Transportation (Springer)
Formation of radiation defects in high-purity silicate glasses in dependence on dopants and UV radiation sources
Creators: name: Natura, Ute
name: Ehrt, Doris
name: Naumann, Karin
Publisher: name: Offenbach : Verlag der Deutschen Glastechnischen Gesellschaft
Year: 2001
Subjects: subject: 660

description: The radiation-resistance of high-purity glasses (≈1 ppm iron) of the type BK7®, DURAN® and lead silicate (PbS) with high transmission in the UV region was studied. The investigations were concentrated on the influence of UV-absorbing dopants on defect generation. These were refming agents, AS2O3, Sb2O3, NaCl, and TiO2 as solarization suppressing agent for the visible range in BK7, and small impurities of tin ions in DURAN. The samples were irradiated with UV lamps and excimer lasers (XeCl-308 nm, KrF-248 nm, ArF-193 nm). The defect generation increases with the use of refining agents in BK7 and with the presence of small amounts of Sn2+ in DURAN. The influence of TiO2 on the defect generation strongly depends on the radiation source. Α model explaining the defect generation in these glasses is suggested.
Parallel treatment of a minimum effluent TMP-newsprint whitewater by aerobic membrane biological treatment and ultrafiltration at 55oC
Creators: name: Ragona, Christina S. F.
Publisher: name: University of British Columbia
Year: 2009

description: A lab scale membrane biological reactor (MBR) consisting of an aerobic biological reactor coupled to a lab scale ceramic ultrafiltration membrane (pore size 500 Angstroms) was operated in parallel with an ultrafiltration treatment system consisting of a non-inoculated mixing tank and the identical ultrafiltration membrane to treat a simulated minimum effluent TMP-newsprint Whitewater at 55°C. The MBR system was operated at hydraulic residence times (HRTs) of 1 day, 0.5 days and 0.33 days with a constant solids retention time (SRT) of 20 days, corresponding to water recovery fractions of 0.95, 0.975, and 0.983, while the UF system was operated at water recovery fractions of 0.9, 0.95, 0.983. The filters were operated at a flow through velocity of 4 m/s and a transmembrane pressure of 138 kPa (20 psi). The MBR performed optimally at a water recovery fraction of 0.983, achieving removal of total and dissolved solids of 29% and 22%, and total and dissolved chemical oxygen demand of 48%) and 34%. Removal of resin and fatty acids were 66% and 99% respectively, cationic demand removal was 48% and removal of UV-Lignin, 8%. The maximum flux through the filter was 162 L7(m2»hr) and the time for a 20% loss of flux was 110 hours. The UF system performed best at a water recovery fraction of 0.95, achieving lower removal of total solids (23%), dissolved solids (18%), total COD (31%), dissolved COD (4%) than the MBR. Removal of resin and fatty acids were 95% and 98% respectively, and removal of cationic demand was 74%. UV-Lignin was not removed at all by the UF system. Maximum flux through the filter was 162 L/(m²∙hr) and the time for a 20% loss of flux was 170 hours. The reduced fouling potential and improved removal of certain contaminants coupled with the lower cost of operation and fewer operational upsets would suggest the ultrafiltration treatment system operated at a water recovery fraction of 0.95 (or volume reduction factor of 20) has higher potential for treating minimum effluent TMP-newsprint Whitewater at 55°C than aerobic membrane biological treatment.
Thermal radiation of chromium-doped glass melts
Creators: name: Gödeke, Dieter
name: Müller, Matthias
name: Rüssel, Christian
Publisher: name: Offenbach : Verlag der Deutschen Glastechnischen Gesellschaft
Year: 2001
Subjects: subject: 660

description: Glass melts are semitransparent radiators whose emission depends on the type and concentration of colouring ions in the melt. Furthermore the temperature profile in the melt especially in regions near the surface is of major importance. In this study, numerical calculations based on experimentally determined absorption coefficients of chromium-doped melts are presented. The model used is that of an isothermal glass melt layer covered by a further layer with a constant temperature gradient. The effect of temperatures, layer thickness and concentrations on the emission spectra is described. Emission spectroscopy should enable the quantitative determination of colouring ions in the melt as well as of the temperature profile near the melt surface.
Λιμάνι αρχαίων Αβδήρων
Creators: name: Αυγολούπης, Ιωάννης Σταύρου
Publisher: name: Aristotle University of Thessaloniki
Year: 2008
Subjects: Αρχαίο λιμάνι
Αβδηρα
Ηρόδοτος
Αρχαία τεχνολογία
Ancient Harbour
Abdera
Herodotus
Ancient technology

description: Στην εργασία παρουσιάζεται το δυτικό λιμάνι της κλασικής φάσης των αρχαίων Αβδήρων και η σύνδεσή της ιστορίας της πόλης με τα λιμάνια της. Αξιολογείται η ασφάλεια που παρείχε το δυτικό λιμάνι των κλασικών χρόνων και η αποτελεσματικότητα της κυματικής σκιάς του μώλου του. Η αξιολόγηση αυτή γίνεται μέσα από τον υπολογισμό του τελικού ύψους των κυματισμών που εισέρχονται στο λιμάνι αυτό αφού έχουν υποστεί τις επιδράσεις των φαινομένων της διάθλασης, της ρηχώσης, της ενδεχόμενης θραύσης και, ακολούθως, την επίδραση του φαινομένου της περίθλασης μέσα στη λιμενολεκάνη.
description: The western classic harbour of Abdera is presented, along with the geomorphical changes that (made it useless) and the relation between the history fo the city and its harbours.
Chiral excitation and effective bandwidth enhancement in tilted coupled optical waveguide lattices
Creators: name: Longhi, Stefano
Publisher: name: arXiv
Year: 2020
Subjects: subject: Optics (physics.optics)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Light escape from an optical waveguide side-coupled to a waveguide lattice provides a photonic analogue of the spontaneous emission process of an excited two-level atom in a one-dimensional array of cavities. According to the Fermi golden rule the decay process is prevented when the atomic resonance frequency falls in a stop band of the lattice, while time-reversal symmetry ensures that the spontaneously emitted photon has equal probability to propagate in opposite directions of the array. This scenario is drastically modified when the quantum emitter drifts along the lattice at a constant speed. In the waveguide optics analogue the atomic drift is emulated by the introduction of a slight geometric tilt of the waveguide axis from the lattice axis. In this setting light excitation in the array is chiral, i.e. light propagates in a preferred direction of the lattice, and coupling is allowed even though the waveguide is far detuned from the tight-binding lattice band.
description: 5 pages, 5 figures, to appear in Optics Letters
Redox behavior of selenium in industrial soda-lime-silica glasses
Creators: name: Müller-Simon, Hayo
name: Bauer, Johannes
name: Baumann, Patrick
Publisher: name: Offenbach : Verlag der Deutschen Glastechnischen Gesellschaft
Year: 2001
Subjects: subject: 660

description: Α thermodynamic model for the calculation of the redox distributions of polyvalent elements which is based on the balance of chemically bonded oxygen in glass melts has been applied to the redox reactions of selenium. Α set of reliable thermodynamic data of the selenium oxidation reactions has been derived using results of electrochemical, optical and wet-chemical investigations. Calculation results showed that selenium is reduced during cooling by iron as well as by sulfur. Due to the small selenium/sulfur ratio in selenium-decolorized flint glasses under industrial conditions selenium is completely reduced to the selenide state. Obviously, in industrially melted flint glasses selenium decolorization is not provided by the pink color of elemental selenium as assumed so far but by the amber color of iron selenide, which is supported by the fact that selenium decolorization always causes an additional yellow tint besides the required red tint and a considerable shift of the UV edge to larger wavelengths.
Ο Αυγουστίνος και η μουσική
Creators: name: Γιαννακοπούλου, Αννα Παντελή
Publisher: name: Aristotle University of Thessaloniki
Year: 2008
Subjects: Ανάλυση βιβλίου "Περι Μουσικής", (De Musica)Αυγουστίνου
Βασικές έννοιες αισθητικής θεωρίας Αυγουστίνου
Ερμηνευτική ανάλυση χωρίων πάνω σε θέματα μουσικής (Αυγουστίνος)
Analysis of "De Musica" of St. Augustine
Basic notions of Augustine's aesthetic theory
Traductional analysis of some texts about music (Augustine)

description: Στόχος της εργασίας αυτής είναι τόσο η αναλυτική προσέγγιση του "Περί Μουσικής" ("De Musica") μέσα από μια φιλοσοφική κ' θεολογική διάσταση κυρίως όσον αφορά το διαχωρισμό της μουσικής σε δύο επίπεδα : στην αισθητή και στη νοητή (απόλυτα αληθινή μουσική), όσο και η αναλυτική επεξεργασία των βασικών εννοιών της αισθητικής θεωρίας του Αυγουστίνου που καθιστά πρόδηλες τις απόψεις του για τη μουσική.
description: The aim of this thesis is not only the analytical approach of "De Musica" through a philosophical and theological dimension especially about the division of music in two parts : in the tangible and in the intellectual (the absolute real music), but also the analytical elaboration of the basic notions of Augustine's aesthetic theory which makes obvious his aspects of music.
An integral model based on slender body theory, with applications to curved rigid fibers
Creators: name: Andersson, Helge I.
name: Celledoni, Elena
name: Ohm, Laurel
name: Owren, Brynjulf
name: Tapley, Benjamin K.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Numerical Analysis (math.NA)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We propose a novel integral model describing the motion of curved slender fibers in viscous flow, and develop a numerical method for simulating dynamics of rigid fibers. The model is derived from nonlocal slender body theory (SBT), which approximates flow near the fiber using singular solutions of the Stokes equations integrated along the fiber centerline. In contrast to other models based on (singular) SBT, our model yields a smooth integral kernel which incorporates the (possibly varying) fiber radius naturally. The integral operator is provably negative definite in a non-physical idealized geometry, as expected from PDE theory. This is numerically verified in physically relevant geometries. We propose a convergent numerical method for solving the integral equation and discuss its convergence and stability. The accuracy of the model and method is verified against known models for ellipsoids. Finally, a fast algorithm for computing dynamics of rigid fibers with complex geometries is developed.
Irgendwie laboristisch. Der ›Vorrang der Arbeit‹ in der Tradition der päpstlichen Sozialenzykliken
Creators: name: Große Kracht, Hermann-Josef
Publisher: name: UB Tübingen
Year: 2015

description: Die normative Forderung nach ›Vorrang der Arbeit vor dem Kapital‹ spielt in der
 Sozialverkündigung der katholischen Kirche spätestens seit der Enzyklika Labo-
 rem exercens eine zentrale Rolle. Dieser Artikel zeichnet die inhaltlichen Schwer-
 punkte und die historische Entwicklung des katholischen Arbeitsverständnisses
 vor dem Hintergrund des liberalen Arbeitsversprechens der europäischen Neuzeit
 nach und macht dabei deutlich, dass sich die katholische Sozialtradition gegenüber
 einem auf den je eigenen Arbeitsleistungen beruhenden Ethos individueller Freiheit
 und Gleichheit in hohem Maße indifferent bzw. ablehnend verhält.

 Im Blick auf die Sozialenzyliken Rerum novarum, Qudragesimo anno, Laborem ex-
 ercens und Centesimus annus werden die eher ›postliberal‹ und ›kollektiv‹ ange-
 legten Dimensionen des päpstlichen Verständnisses von Wesen und Wert mensch-
 licher Arbeit und ihrer Bedeutung für den gesellschaftlichen Wohlstand analysiert,
 die schon in Rerum novarum deutlich angesprochen werden. Seit dem II. Vatika-
 nischen Konzil entstehen zudem Aufbrüche zu einer ›Theologie der Arbeit‹, in de-
 nen es ebenfalls eher um die gemeinschaftlichen als um die individuelle Aspekte
 der Arbeit der Menschen geht. Dennoch werden die damit verbundenen ›laboris-
 tischen Herausforderungen‹, die den Grundtenor der päpstlichen Sozialverkün-
 digung kennzeichnen, in den aktuellen Debatten der christlichen Gesellschafts-
 ethik kaum aufgegriffen.

 The normative claim of ‹priority of labor over capital› plays a central role in the social
 doctrine of the Roman Catholic Church, at least since the papal encyclical Laborem
 exercens (1981). This article deals with the characteristics and developments of the
 catholic concept of human labor, in contrast to the specific ‹labor promise› of modern
 Europe since the time of the Reformation and the Age of Enlightenment. That the
 catholic concept of labor seems to be quite indifferent to this ‹labor promise› of
 individual liberty and equality is one of the leading presumptions of this article.

 Analyzing the papal encyclicals Rerum Novarum, Quadragesimo anno, Laborem
 exercens and Centesimus annus the author stresses the rather ‹post-liberal› and
 ‹collective› dimensions of the popes’ thinking on human labor and its relations to
 the common production of wealth and well-being of human communities. This topic
 is of importance already in Rerum Novarum. Since the 1960s, following Second
 Vatican Council, there is also an effort to elaborate a certain theology of labor as
 well as dealing more with collective action than individual work. Nevertheless, in
 the ongoing debates of contemporary Christian social ethics these ‹laboristic
 challenges› of the papal encyclicals haven't been picked up.
description: Ethik und Gesellschaft, 2011: Sonderheft 2011 Arbeit – Eigentum – Kapital. Zur Kapitalismuskritik der großen Sozialenzykliken
Additional file 1 of Surgery for non-Meckel’s small-bowel diverticular perforation: two case reports and a literature review
Creators: name: Matsuya, Naoki
name: Kuwabara, Akifumi
name: Morioka, Nobuhiro
name: Tanabe, Tadashi
name: Musha, Nobuyuki
name: Nishikura, Ken
name: Tsubono, Toshihiro
Publisher: name: figshare
Year: 2024
Subjects: subject: Medicine
subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Physiology
subject: Chemical Sciences not elsewhere classified
subject: Science Policy
subject: Cancer

description: Supplementary Material 1.
s-Wave-Like excitation in the superconducting state of electron-doped cuprates with d-wave pairing
Creators: name: Yuan, Qingshan
name: Yan, Xin-Zhong
name: Ting, C. S.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: An intrinsic physical mechanism, based on the doping evolution of the Fermi surface (FS), is explored to reconcile the contradictory experimental results on the superconducting (SC) pairing symmetry in electron-doped cuprates. It is argued that the FS pocket around $(π/2,π/2)$ has not yet formed until doping reaches about the optimal value. Therefore, in the underdoped regime, even if the SC order parameter is $d$ wave which vanishes along the line $k_x=k_y$, the quasiparticle excitation gap is still finite and looks s-wave-like due to the absence of the FS across that line. This makes it possible, with d-wave SC pairing, to understand those experiments which evidenced the s-wave quasiparticle excitation. An explicit theory with consideration of both antiferromagnetic and SC orders is implemented to exhibit the FS evolution from underdoping to overdoping and associated with it the variations of the quasiparticle property, electronic density of states, and low temperature dependences of the physical quantities heat capacity and superfluid density.
description: 10 pages, 5 figures, accepted for publication in Phys. Rev. B
Εκτίμηση του δικτυακού φόρτου συστημάτων ηλεκτρονικής μάθησης
Creators: name: Βασδέκης, Χρήστος Ευαγγέλου
Publisher: name: Aristotle University of Thessaloniki
Year: 2008
Subjects: Εκτίμηση
δικτυακός φόρτος
συστήματα ηλεκτρονική μάθηση
evaluation network load
e-learning systems

description: Οι τεχνολογίες που έχουν αναπτυχθεί στους τομείς της επιστήμης των ηλεκτρονικών υπολογιστών (Η/Υ) και των επικοινωνιών μεταβάλλουν και την εκπαίδευση. Τόσο με τη μορφή υποστήριξης (συνεχής πρόσβαση στο εκπαιδευτικό υλικό μέσω διαδικτύου, δημιουργία ηλεκτρονικών βιβλιοθηκών, συστημάτων ασύγχρονης συνεργασίας - forums, bulletin boards) όσο και με τη μορφή σύγχρονης εξ' αποστάσεως διδασκαλίας (e-learning), με τον καθηγητή και τους φοιτητές του να βρίσκονται ο καθένας στο δικό του χώρο την ώρα του μαθήματος (με τη χρήση πολυμεσικών δεδομένων - ήχου, βίντεο και διαμοιρασμού επιφάνειας εργασίας των Η/Υ ).Στην εργασία αυτή χρησιμοποιείται το πρόγραμμα NetMeeting για τη δημιουργία μαθημάτων εξ' αποστάσεως διδασκαλίας με χρήση ήχου, βίντεο, συνομιλίας κειμένου (chat), πίνακα συνεργασίας (drawing board) και διαμοιρασμού επιφάνειας εργασίας (desktop sharing). Ταυτόχρονα μετρούνται τα εύρη ζώνης που απαιτεί κάθε τύπος μαθήματος και παρουσιάζονται τα εργαλεία που χρησιμοποιήθηκαν στις μετρήσεις. Τέλος παρουσιάζονται τα αποτελέσματα των μετρήσεων και προτείνονται μαθηματικές σχέσεις ανάλογα με το είδος των δεδομένων που χρησιμοποιήθηκαν και των αριθμό των φοιτητών που συμμετείχαν.
description: The technologies that have been developed in the fields of computer science and communications have made possible many changes in education. Not only as supporting technologies (continuous access to education material, electronic libraries, asynchronous collaboration systems - forums, bulletin boards) but also as real time e-learning systems, with the teacher and the students each attending the lesson from their own place (using multimedia data - sound, video and desktop sharing).In this thesis we used NetMeeting for the creation a series of distant lessons using sound, video, text chat, drawing board and desktop sharing. At the same time we measured the bandwidth needed by every lesson type and we present the tools used for measurements. At the end we present the measurement results and we propose formulas proponent to the data types used in the lessons and the number of students taking part.
description: Σε συνεργασία με το τμήμα Λογιστικής και Χρηματοοικονομικής (Πανεπιστήμιο Μακεδονίας)
Additional file 1 of Integrating deep phenotyping with genetic analysis: a comprehensive workflow for diagnosis and management of rare bone diseases
Creators: name: Li, Guozhuang
name: Xu, Kexin
name: Yin, Xiangjie
name: Yang, Jianle
name: Cai, Jihao
name: Yang, Xinyu
name: Li, Qing
name: Wang, Jie
name: Zhao, Zhengye
name: Mahesahti, Aoran
name: Zhang, Ning
name: Zhang, Terry Jianguo
name: Wu, Nan
Publisher: name: figshare
Year: 2024
Subjects: subject: Medicine
subject: Genetics
subject: FOS: Biological sciences
subject: Pharmacology
subject: Biotechnology
subject: Sociology
subject: FOS: Sociology
subject: Cancer
subject: Science Policy
subject: Computational Biology

description: Additional file1
title: Beyond the bias-variance trade-off
Creators: name: Nassiri, Abdelbast
Year: 2025

description: Das Double-Descent-Phänomen stellt den klassischen Bias-Variance-Trade-off infrage, indem es zeigt, dass eine Erhöhung der Modellkomplexität über den Interpolationspunkt hinaus in einigen Fällen zu einer verbesserten Generalisierungsleistung führen kann. Obwohl dieses Phänomen in den letzten Jahren intensiv untersucht wurde, bleibt die Literatur fragmentiert, wobei Erkenntnisse über verschiedene Modelle und Settings verstreut sind. Diese Arbeit bietet eine umfassende Synthese der bestehenden Forschung zum Double-Descent-Phänomen und präsentiert eine einheitliche Perspektive auf sein Verhalten in verschiedenen statistischen Modellen. Wir beginnen mit einer systematischen Übersicht über Double Descent in linearen Regressionsmodellen, wobei wir die Rolle von Überparametrisierung, Regularisierung und das Zusammenspiel zwischen Modellkomplexität und Stichprobengröße hervorheben. Anschließend untersuchen wir Double Descent in Random-Feature-Modellen, wobei wir Erkenntnisse über den Einfluss der Feature-Dimensionalität und den Übergang von unterparametrisierten zu überparametrisierten Regimes zusammenfassen. Danach wenden wir uns neuronalen Netzen (NNs) zu und fassen empirische und theoretische Ergebnisse zusammen, die Double Descent mit Optimierungsdynamiken, impliziter Regularisierung und den einzigartigen Eigenschaften von Deep-Learning-Modellen in Verbindung bringen. Schließlich geben wir einen Überblick über Techniken zur Minderung des Double-Descent-Effekts, darunter Ridge-Regression, Early Stopping und Ensemble-Methoden. Durch die Strukturierung und Verfeinerung bestehender Ergebnisse bieten wir einen klaren Leitfaden für Praktiker, die sich den Herausforderungen überparametrisierter Modelle stellen müssen. Diese Arbeit zielt nicht darauf ab, neue theoretische oder empirische Beiträge zu liefern, sondern dient als strukturierte und zugängliche Synthese des aktuellen Wissensstands zum Double-Descent-Phänomen. Durch die Konsolidierung und Klärung bestehender Arbeiten wollen wir Lücken in der Literatur schließen und eine Grundlage für zukünftige Forschungen in diesem sich schnell entwickelnden Bereich schaffen.
Fractional antiferromagnetic skyrmion lattice induced by anisotropic couplings
Creators: name: Gao, Shang
name: Rosales, H. D.
name: Albarracín, F. A. Gómez
name: Tsurkan, Vladimir
name: Kaur, Guratinder
name: Fennell, Tom
name: Steffens, Paul
name: Boehm, Martin
name: Čermák, Petr
name: Schneidewind, Astrid
name: Ressouche, Eric
name: Cabra, Daniel C.
name: Rüegg, Christian
name: Zaharko, Oksana
Publisher: name: arXiv
Year: 2020
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Magnetic skyrmions are topological solitons with a nanoscale winding spin texture that hold promise for spintronics applications. Until now, skyrmions have been observed in a variety of magnets that exhibit nearly parallel alignment for the neighbouring spins, but theoretically, skyrmions with anti-parallel neighbouring spins are also possible. The latter, antiferromagnetic skyrmions, may allow more flexible control compared to the conventional ferromagnetic skyrmions. Here, by combining neutron scattering and Monte Carlo simulations, we show that a fractional antiferromagnetic skyrmion lattice with an incipient meron character is stabilized in MnSc$_2$S$_4$ through anisotropic couplings. Our work demonstrates that the theoretically proposed antiferromagnetic skyrmions can be stabilized in real materials and represents an important step towards implementing the antiferromagnetic-skyrmion based spintronic devices.
description: 14 pages, 11 figures, submitted version with necessary edits
Zu Unrecht vernachlässigt. Zur bleibenden Relevanz des katholischen Eigentumsverständnisses
Creators: name: Schäfers, Michael
Publisher: name: UB Tübingen
Year: 2015

description: Die katholische Traditionsbildung zu Eigentum und Besitz richtet sich an ord-
 nungspolitischen Vorstellungen aus. Die Nutzung von Eigentum und Besitz
 wird in einer engen Verbindung und Spannung zu den Rechten der Armen
 ausgelegt und unter einen legitimatorischen Vorbehalt gestellt. Ein absolu-
 tes Eigentumsrecht kennt deshalb die Soziallehre der Kirche nicht. Die Ord-
 nungsvorstellungen der Kirche gerieten durch verschiedene historische Er-
 eignisse und Bewegungen unter Druck und verloren an Plausibilität. Die
 päpstlichen Sozialenzykliken ab 1891 lösen sich von einem abstrakten
 Recht auf Eigentum und vollziehen den Weg hin zu einer Verzahnung die-
 ses Rechts mit der menschlichen Arbeit und anderen konditionalen Beding-
 ungen. Die jüngsten Transformationen der kapitalistischen Wirtschaftsweise
 machen deutlich, dass die Soziallehre der Kirche heute verstärkt eine kri-
 tische Auseinandersetzung zu Eigentum und Besitz führen müsste.

 The Catholic tradition of property and ownership is geared to regulatory
 requirements. The use of property and ownership is interpreted in a narrow
 connection with the rights of the poor, and in tension to it, and is placed
 under a reservation of legitimation. An absolute right of ownership is not
 known by the social doctrine of the Church. The concept of order of the
 Church got under pressure by the various historical events and movements,
 and lost its plausibility. The papal social encyclicals since 1891 release from
 an abstract right of property, and complete the path to a gear tooth with the
 law of human labor and other conditional terms. The recent transformations
 of the capitalist economy make clear that the social doctrine of the Church
 should now increasingly lead to a critical discussion on property and ownership.
description: Ethik und Gesellschaft, 2011: Sonderheft 2011 Arbeit – Eigentum – Kapital. Zur Kapitalismuskritik der großen Sozialenzykliken
An analytical error model for quantum computer simulation
Creators: name: Chi, Eric
name: Lyon, Stephen A.
name: Martonosi, Margaret
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Quantum computers (QCs) must implement quantum error correcting codes (QECCs) to protect their logical qubits from errors, and modeling the effectiveness of QECCs on QCs is an important problem for evaluating the QC architecture. The previously developed Monte Carlo (MC) error models may take days or weeks of execution to produce an accurate result due to their random sampling approach. We present an alternative analytical error model that generates, over the course of executing the quantum program, a probability tree of the QC's error states. By calculating the fidelity of the quantum program directly, this error model has the potential for enormous speedups over the MC model when applied to small yet useful problem sizes. We observe a speedup on the order of 1,000X when accuracy is required, and we evaluate the scaling properties of this new analytical error model.
Η σωφροσύνη στον Πλάτωνα
Creators: name: Κυριακίδου, Ερασμία Πρόδρομου
Publisher: name: Aristotle University of Thessaloniki
Year: 2008
Subjects: Σωφροσύνη
"Χαρμίδης"
"Πολιτεία"
"Αρετή"
Εγκράτεια
Αυτογνωσία
Sophrosyne
"Charmides"
"Virtue"
"Republic"
Self restraint
Self knowledge

description: Η θέση του Πλάτωνα στην ιστορία της σωφροσύνης αποτελεί παράδειγμα για την εξέχουσα επίδραση του πάνω στην Ελληνική διανόηση γενικότερα, γιατί μέσω αυτού η ανάπτυξη της έννοιας ακολουθεί μία κλίμακα. Αυτό συμβαίνει όχι μόνο γιατί επανεξετάζει τις περισσότερες από τις προηγούμενες προσεγγίσεις της αρετής οι οποίες είχαν αναδυθεί από τον αρχαϊκό και κλασικό κόσμο αλλά κυρίως γιατί τις μορφοποιεί σε μια νέα ενότητα. Στην παρούσα εργασία, εφόσον τα τρία σημαντικά θέματα της φιλοσοφίας του Πλάτωνα είναι η ηθική, η πολιτική και η κοσμολογία επιχειρήθηκε να παρουσιαστεί η σχέση της σωφροσύνης με τον καθένα ξεχωριστά, προσεγγίζοντας με περισσότερη λεπτομέρεια τους διαλόγους Χαρμίδης και Πολιτεία και παρουσιάζοντας σημαντικά αποσπάσματα από άλλους διαλόγους όπως τον Γοργία, τον Φαίδρο, το Φαίδωνα, το Συμπόσιο, το Φίληβο και τους Νόμους
description: Plato's place in the history of sophrosyne exemplifies his sovereign effect on Greek thought in general, for with him the development of this concept reaches a climax. Not only did he reconsider most of the earlier interpretations of the virtue which had emerged from the archaic and the classical worlds and reintegrate them into a new unity, but he so extended its scope that all subsequent interpretations were the result, in some fashion, of this achievement. Since however, Plato's three great topics are ethics, politics, and cosmology i attempted to show the relation of sophrosyne to each of them, considering in some detail the Charmides and Republic and noting significant passages in the Gorgias, Phaedrus, Phaedo, Symposium, Philebus and Laws
Otto Schott (1851 to 1935) - Founder of modern glass science and glass technology
Creators: name: Steiner, Jürgen
Publisher: name: Offenbach : Verlag der Deutschen Glastechnischen Gesellschaft
Year: 2001
Subjects: subject: 660

description: December 17, 2001 is the 150th anniversary of the birth of Otto Schott. The glass chemist and glass technician was one of the most important scientists, technologists and entrepreneurs in Germany in the late 19th and early 20th centuries. He carried out systematic melting trials to research the composition and properties of glass and developed new technological processes for the manufacture of glass. In so doing he created the basis for the development and manufacture of special glasses. In 1884 he founded the Glastechnisches Laboratorium Schott & Genossen in Jena which was the forerunner of the present day Schott Jenaer Glas GmbH, of the foundation enterprise Schott Glas in Mainz and of the whole Schott Group.
Kants Erbe: Zur Asymmetrie in der Doppelseitigkeit des Eigentums
Creators: name: Rödl, Florian
Publisher: name: UB Tübingen
Year: 2015

description: er Beitrag startet mit dem Befund, dass die »Doppelseitigkeit« des Eigentums,
 wie sie in Quadragesimo Anno entfaltet wird, eine Asymmetrie zulasten der Ge-
 meinwohlbindung des Eigentums aufweist. Diese Asymmetrie repräsentiert ein
 Erbe Kants, der das Eigentum exklusiv als Möglichkeitsbedingung individueller
 menschlicher Freiheit deutet. In diesem Rahmen können die persistenten so-
 zialen und ökologischen Folgen der Eigentumsordnung normativ erst in einem
 zweiten und zweitrangigen Schritt ins Spiel kommen. Dies spiegelt sich in der
 Asymmetrie der »Doppelseitigkeit«, die sich nicht nur in der Sozialenzyklika,
 sondern auch in der Eigentumsgarantie des Grundgesetzes findet. Eine alter-
 native Begründung des Eigentums müsste, so lautet das Fazit, die Gemein-
 wohlbindung aus sich selbst heraus treiben.

 The paper’s starting point is that the twofold character of property, as it is de-
 veloped in Quadragesimo Anno, entails an asymmetry, conferring primacy to
 the individual character of property as individual use, to the disadvantage of its
 function to serve the common good. The asymmetry represents a Kantian
 heritage. Kant founded property exclusively in individual human freedom. Once
 this frame is established, problems which come with an institutional order of
 property can be brought up only in a second and subordinated step. This logic is
 mirrored in the Social Encyclical’s asymmetry of property’s twofold character. It
 can also be traced in the German constitution‘s guaranty of property rights. An
 alternative must root the social character of property in the foundation of property
 itself.
description: Ethik und Gesellschaft, 2011: Sonderheft 2011 Arbeit – Eigentum – Kapital. Zur Kapitalismuskritik der großen Sozialenzykliken
Burner systems for glass melting furnaces with recuperative air preheating
Creators: name: Flamme, Michael
name: Kösters, Meik
name: Boß, Mark
Publisher: name: Offenbach : Verlag der Deutschen Glastechnischen Gesellschaft
Year: 2001
Subjects: subject: 660

description: Five different burners on an industrial scale were investigated, a standard burner and a staged burner being in industrial operation, as well as a new staged burner, a new flameless oxidation burner and an oxy-fuel burner. Α comparison of heat transfer from airfuel flames with intensified heat transfer and oxy-fuel flames was carried out. The results clearly indicate that with the new burner technology it is possible to reduce the ΝΟx emission drastically, so that the 500 mg/m3 ΝΟx limit can be achieved at glass melting furnaces. With the new burners one can obtain the same size of flames as with conventional burners. The results obtained with different heat flux measurement techniques indicate that the heat flux of the new burners is in the same range as that of the conventional burner. The project yielded extensive data for characterizing the flames and the suitability of the burners for different types of glass and glass furnaces. In addition, the experimental results serve as comparison data for mathematical modeling validation.
Mass matrices for quarks and leptons in triangular form
Creators: name: Tatur, Stanislaw
name: Bartelski, Jan
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We assume that all quark and lepton mass matrices have upper triangular form. Using all available experimental data on quark and lepton masses and mixing angles we make a fit in which we determine mass matrices elements. There are too many free parameters and our solutions are not uniqe. We look for solutions with small non diagonal mixing matrix elements. In order to reduce the number of free parameters we assume that the matrix element $(M)_{13}$ vanishes in \underline{all} mass matrices. Such universal assumption was drown from considering different numerical solutions. The lepton sector, due to large mixing angles and very small errors for charged lepton masses, is more restrictive then quark sector. We present the solution in this case. The absolute values of neutrino masses are not fixed. The another possibility of reducing number of free parameters was considered by us before. With the additional assumption motivated by SU(5) symmetry which connects mixing in right handed down quarks with left handed charged leptons we get a solution in which observed Cabibbo-Kobayashi-Maskawa mixing for quarks comes mainly from non diagonal terms in up quark mass matrix. From the fit we get also predictions for neutrino masses.
description: Latex, 20 pages, no figures, extended and modified version to be published in Acta Phys. Pol. B
Kapitalismus und Demokratie. Zur Gesellschaftstheorie von »Centesimus annus«
Creators: name: Möhring-Hesse, Matthias
Publisher: name: UB Tübingen
Year: 2015

description: Um die Vorteile von kapitalistisch verfassten Wirtschaften zu nutzen, ohne die ih-
 nen eigenen Mängel in Kauf nehmen zu müssen, schlägt Centesimus annus als
 gesellschaftspolitische Reformidee vor, die Volkswirtschaften unter gesellschaft-
 liche, dabei demokratisch vollzogene Kontrolle zu nehmen. Diese Reformidee
 hat einen theoretischen Hintergrund, den die Enzyklika mit dem Begriff der ›Sub-
 jektivität der Gesellschaft‹ anspricht. Auch wenn in dem Rundschreiben nicht aus-
 geführt, kann die sich darin ausdrückende Vorstellung von Gesellschaft gesell-
 schaftstheoretisch ausgebaut und von daher auch die Reformidee von Cente-
 simus annus plausibilisiert werden.

 To be able to use the advantages of capitalist economies without having to accept
 their defects, Centesimus annus suggests taking these economies under social and
 democratic control. This idea has a theoretical background, approached in the con-
 cept of ‹subjectivity of society›. Even if this concept is not explained it can be im-
 proved to a social theory; and in doing so the idea of democratic control of econom-
 ies can be made plausible.
description: Ethik und Gesellschaft, 2011: Sonderheft 2011 Arbeit – Eigentum – Kapital. Zur Kapitalismuskritik der großen Sozialenzykliken
Effect of Cr2O3, ZrO2 and LiF on nucleation and crystallization of nepheline syenite-dolomite glass-ceramic compositions
Creators: name: El-Shennawi, Ahmed W. Α.
name: Omar, Aly Α.
name: Hamzawy, Esmat M. Α.
Publisher: name: Offenbach : Verlag der Deutschen Glastechnischen Gesellschaft
Year: 2001
Subjects: subject: 660

description: Inexpensive nepheline-pyroxene glass-ceramics of superior mechanical, and thermal properties could be easily prepared from nepheline syenite and dolomite rock mixture by using the conventional glass preparation and heat treatment methods. The parent glass composition, to yield ≈35 % nepheline ss (solid solution) and 65 % diopside ss, was formulated by a modified chemico-mineralogical calculation method after CIPW norm. The effect of the nucleating agents Cr2O3, ZrO2 and LiF on the mechanisms of nucleation and crystallization of these phases were determined by DTA, XRD, as well as optical and electron microscopy. In the absence of these nueleators, crystallization was difficult and semi-crystalline coarse microstructure of diopsidic ss was obtained. LiF showed maximum effect on crystal growth rates, while sufficient nucleation density for glass-ceramic of good quality was achieved by adding Cr2O3 even in the amount as small as 0.5 wt%. Both Cr2O3- and ZrO2-containing samples hindered the crystallization of nepheline but greatly stimulated the epitactic formation of diopside ss of holocrystalline microstructures. LiF-containing samples stimulated the crystallization of the framework silicates, nepheline ss and carnegieite, which progressively increased with the LiF concentration. The thermal expansion coefficient and Vickers hardness of the obtained glass-ceramic reached values of 9.0 × 10^-6 K-1 (20 to 300 °C) and (950 × 10^7 ± 25) N/m2, respectively.
Albert Biesinger und Joachim Schmidt (Hg.): Ora et labora. Eine Theologie der Arbeit
Creators: name: Daher, Uwe
Publisher: name: UB Tübingen
Year: 2015

description: Ethik und Gesellschaft, 2011: Sonderheft 2011 Arbeit – Eigentum – Kapital. Zur Kapitalismuskritik der großen Sozialenzykliken
Electron Impact Induced Loss of C-5/C-8 Substituents of 1,2,3,4-Tetrahydroisoquinolines, V: Synthesis and Mass Spectrometric Fragmentation of Dihydroisoindole Derivatives
Creators: name: Knefeli, F.
name: Mayer, K. K.
name: Wiegrebe, Wolfgang
Publisher: name: Universität Regensburg
Year: 1989
Subjects: subject: 540 Chemie

description: C-8-substituted N-methyl-1,2,3,4-tetrahydroisoquinoline radical cations lose the complete substituent in a one step reaction giving rise to an unexpected ion at m/z 146, which is probably identical with the dihydroisoindolylmethyl- cation A. The dihydroisoindoles 1, 10, and 16 were prepared as potentially alternative precursors of ion A. However, the ion at m/z 146 in their EI mass spectra is of very low intensity, so CID-experiments for structural comparison could not be performed. The electron impact induced fragmentations of 1,10, and 16 are discussed. An C-8 substituierte N-Methyl-1,2,3,4-tetrahydroisochinolin-Radikalkationen verlieren den gesamten Substituenten in einstufiger Reaktion unter Bildung eines unerwarteten Ions bei m/z 146, dessen postulierte Identität mit dem Dihydroisoindolylmethyl-Kation A geprüft werden sollte. Die Dihydroisoindole 1,10 und 16 - mögliche Vorläufer von A - wurden synthetisiert In ihren EI-MS tritt das Ion bei m/z 146 mit nur sehr geringer Intensität auf, CID-Messungen zum Strukturvergleich konnten daher nicht durchgeführt werden. Die Elektronenstoß-induzierten Fragmentierungen von 1,10 und 16 werden diskutiert.