cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
title: Nanotechnology in Greece: From research to commercialization
Creators: name: Παπαδοπουλος Κυπαρισης
Publisher: name: Technical University of Crete
Year: 2024

description: Innovations in nanotechnology are making a revolution in manufacturing and production, creating new materials and products through novel processes for commercial applications. New products based on nanotechnology, with novel characteristics are continued to grow and benefit the society. Nanotechnology holds great promise and is hyped by many as the next industrial evolution. Medicine, food, cosmetics, agriculture, environmental health, and technology industries already profit from nanotechnology innovations and their influence is expected to increase drastically in the near future.
Technology transfer from universities and investment decisions are major forces in how nanotechnology develops, and this is dependent on the support from Government, academia, private investors, and companies. Several commercialization strategies seem suitable: patenting, licensing, equity investment, spin off companies, strategic alliances, and private consortium or cluster alliance.
In Greece, many agencies, mainly groups of universities and research centers, are active in nanotechnology. In addition, the advantages of exploiting research results are beginning to be recognized. For example, academic entrepreneurship is strengthened through a multitude of government funding initiatives, supporting mechanisms (such as technology parks, incubators, etc.) with the aim of promoting innovation, enhancing economic development.
However, there are also many challenges that need to be overcome to bring a nanotechnological product or business to the market. Even the most impressive scientific achievements can become a commercial failure due to a lack of understanding of, and the absence of a strategy relating to, the legal and regulatory issues surrounding the commercialization of a technology.
This thesis will try to explore the factors influencing the transfer and utilization of research results by universities and research centers, aiming to identify optimal conditions for this process. Moreover, the innovation model in a country like Greece is investigated, which has limited experience in academic entrepreneurship, and it is examined if a framework for successful nanotechnology management is established. Additionally, the level of academic research in nanotechnology is assessed and the effectiveness of transferring research results to industry is studied. Overall, this research aims to contribute to improving innovation management and increase the success rate of nanotechnology inventions.
Greybody factor and quasinormal modes of Regular Black Holes
Creators: name: Rincón, Ángel
name: Santos, Victor
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this work, we investigate the quasinormal frequencies of a class of regular black hole solutions which generalize Bardeen and Hayward spacetimes. In particular, we analyze scalar, vector and gravitational perturbations of the black hole both with the semianalytic WKB method and their time-domain profiles. We analyze in detail the behavior of the spectrum depending on the parameter $p/q$ of the black hole, the quantum number of angular momentum and the $s$ number. In addition, we compare our results with the classical solution valid for $p = q = 1$.
description: Accepted for publication in the European Physical Journal C (EPJ C)
Το portfolio των εκπαιδευτικών ξένων γλωσσών και η συμβολή του στην επαγγελματική τους ανάπτυξη: πρώτα συμπεράσματα από την περίπτωση μίας καθηγήτριας της γερμανικής ως ξένης γλώσσας
Creators: name: Δαμπρατζίδου, Βασιλική Παρασκευά
Publisher: name: Aristotle University of Thessaloniki
Year: 2012
Subjects: Πορτφόλιο
Εκπαιδευτικός ξένων γλωσσών
Επαγγελματική ανάπτυξη
Portfolio
Foreign language teacher
Professional development

description: Σκοπός της παρούσας διατριβής ήταν να εξετάσει κατά πόσο το portfolio του εκπαιδευτικού προωθεί την επαγγελματική του ανάπτυξη. Με τη βοήθεια της μεθόδου της μελέτης περίπτωσης με αντικείμενο μία καθηγήτρια της Γερμανικής ως ξένης γλώσσας εξετάστηκε η στάση της εκπαιδευτικού απέναντι στη χρήση του portfolio, ενώ, παράλληλα, προσδιορίστηκαν τα προβλήματα που αντιμετώπισε η ίδια κατά τη διάρκεια της χρήσης του. Ένα άλλο θέμα που ενδιέφερε την έρευνα ήταν οι προτάσεις της εκπαιδευτικού για βελτίωση του portfolio που χρησιμοποιήθηκε από την ίδια. Από την ανάλυση των δεδομένων επιβεβαιώνονται έρευνες που δείχνουν ότι το portfolio του εκπαιδευτικού αναδεικνύεται σε ένα εργαλείο που μπορεί να συμβάλει στην προώθηση της επαγγελματικής ανάπτυξης του εκπαιδευτικού, αποτελώντας εκτός των άλλων ένα κατάλληλο εργαλείο στοχασμού. Ωστόσο, διαπιστώθηκε ότι ο εκπαιδευτικός χρειάζεται περισσότερο χρόνο στη διάθεσή του καθώς και επαρκή καθοδήγηση κατά το ξεκίνημα της σύνταξης του portfolio.
description: The aim of the present thesis was to examine whether the teaching portfolio promotes professional development. With the help of the method of the case study concerning a teacher of German as a foreign language the teacher’s attitude towards the use of the portfolio was examined and the problems, she was confronted with during its use, were identified. Furthermore, the teacher’s recommendations concerning the improvement of the portfolio she used were recorded. The analysis of the data confirmed previous studies showing that the teaching portfolio is a tool that can help teachers to promote their professional development, providing among other things a suitable tool for reflection. However, it was found that teachers should have more time available and adequate guidance at the beginning of developing a portfolio.
Families of spatial solitons in a two-channel waveguide with the cubic-quintic nonlinearity
Creators: name: Birnbaum, Ze'ev
name: Malomed, Boris A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Pattern Formation and Solitons (nlin.PS)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We present eight types of spatial optical solitons which are possible in a model of a planar waveguide that includes a dual-channel trapping structure and competing (cubic-quintic) nonlinearity. Among the families of trapped beams are symmetric and antisymmetric solitons of "broad" and "narrow" types, composite states, built as combinations of broad and narrow beams with identical or opposite signs ("unipolar" and "bipolar" states, respectively), and "single-sided" broad and narrow beams trapped, essentially, in a single channel. The stability of the families is investigated via eigenvalues of small perturbations, and is verified in direct simulations. Three species - narrow symmetric, broad antisymmetric, and unipolar composite states - are unstable to perturbations with real eigenvalues, while the other five families are stable. The unstable states do not decay, but, instead, spontaneously transform themselves into persistent breathers, which, in some cases, demonstrate dynamical symmetry breaking and chaotic internal oscillations. A noteworthy feature is a stability exchange between the broad and narrow antisymmetric states: in the limit when the two channels merge into one, the former species becomes stable, while the latter one loses its stability. Different branches of the stationary states are linked by four bifurcations, which take different forms in the model with the strong and weak inter-channel coupling.
Preference fusion when the number of alternatives exceeds two: indirect scoring procedures
Creators: name: Chebotarev, Pavel
name: Shamis, Elena
Publisher: name: arXiv
Year: 2006
Subjects: subject: Optimization and Control (math.OC)
subject: Multiagent Systems (cs.MA)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences
subject: 91B08, 91B10, 91B12, 62J15

description: We consider the problem of aggregation of incomplete preferences represented by arbitrary binary relations or incomplete paired comparison matrices. For a number of indirect scoring procedures we examine whether or not they satisfy the axiom of self-consistent monotonicity. The class of {\em win-loss combining scoring procedures} is introduced which contains a majority of known scoring procedures. Two main results are established. According to the first one, every win-loss combining scoring procedure breaks self-consistent monotonicity. The second result provides a sufficient condition of satisfying self-consistent monotonicity.
description: 26 pages, 5 figures One typo fixed
Nanoscale electric-field imaging based on a quantum sensor and its charge-state control under ambient condition
Creators: name: Bian, Ke
name: Zheng, Wentian
name: Zeng, Xianzhe
name: Chen, Xiakun
name: Stohr, Rainer
name: Denisenko, Andrej
name: Yang, Sen
name: Wrachtrup, Joerg
name: Jiang, Ying
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Nitrogen-vacancy (NV) centers in diamond can be used as quantum sensors to image the magnetic field with nanoscale resolution. However, nanoscale electric-field mapping has not been achieved so far because of the relatively weak coupling strength between NV and electric field. Using individual shallow NVs, here we succeeded to quantitatively image the contours of electric field from a sharp tip of a qPlus-based atomic force microscope (AFM), and achieved a spatial resolution of ~10 nm. Through such local electric fields, we demonstrated electric control of NV's charge state with sub-5 nm precision. This work represents the first step towards nanoscale scanning electrometry based on a single quantum sensor and may open up new possibility of quantitatively mapping local charge, electric polarization, and dielectric response in a broad spectrum of functional materials at nanoscale.
description: 32 pages, 5 figures
Effective Route Scheme of Multicast Probing to Locate High-loss Links in OpenFlow Networks
Creators: name: Tri, Nguyen Minh
name: Shibata, Masahiro
name: Tsuru, Masato
Publisher: name: arXiv
Year: 2020
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: With the prevalence of cloud computing and contents delivery networking, OpenFlow-based centrally-managed networks with flexible and dynamic traffic engineering are demanded. To maintain a high quality of service of the network, detecting and locating high-loss links is essential. Therefore, in this paper, a measurement framework is proposed to promptly locate all high-loss links with a minimized load on both data-plane and control-plane incurred by the measurement, which assumes only standard OpenFlow functions. It combines an active measurement by probing multicast packets along a designed route and a passive measurement by collecting flow-stats of the probing flow at selected switch ports in an appropriate sequential order to access switches. In particular, by designing the measurement route based on the backbone-and-branch tree (BBT) route scheme, the measurement accuracy and the measurement overhead (i.e., the number of accesses to switches until locating all high-loss links) can be balanced. The numerical simulation demonstrates the effectiveness of our proposal.
Computer-aided hepatic tumour ablation : requirements and preliminary results
Creators: name: Voirin, David
name: Payan, Yohan
name: Amavizca, Miriam
name: Letoublon, Christian
name: Troccaz, Jocelyne
Publisher: name: arXiv
Year: 2006
Subjects: subject: Medical Physics (physics.med-ph)
subject: FOS: Physical sciences

description: Surgical resection of hepatic tumours is not always possible, since it depends on different factors, among which their location inside the liver functional segments. Alternative techniques consist in local use of chemical or physical agents to destroy the tumour. Radio frequency and cryosurgical ablations are examples of such alternative techniques that may be performed percutaneously. This requires a precise localisation of the tumour placement during ablation. Computer-assisted surgery tools may be used in conjunction with these new ablation techniques to improve the therapeutic efficiency, whilst they benefit from minimal invasiveness. This paper introduces the principles of a system for computer-assisted hepatic tumour ablation and describes preliminary experiments focusing on data registration evaluation. To keep close to conventional protocols, we consider registration of pre-operative CT or MRI data to intra-operative echographic data.
Impact of non-gravitational effects on chaotic properties of retrograde orbits
Creators: name: Kankiewicz, Paweł
name: Włodarczyk, Ireneusz
Publisher: name: arXiv
Year: 2021
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: Dynamical studies of asteroid populations in retrograde orbits, that is with orbital inclinations greater than 90 degrees, are interesting because the origin of such orbits is still unexplained. Generally, the population of retrograde asteroids includes mostly Centaurs and transneptunian objects (TNOs). A special case is the near-Earth object (343158) 2009 HC82 from the Apollo group. Another interesting object is the comet 333P/LINEAR, which for several years was considered the second retrograde object approaching Earth. Another comet in retrograde orbit, 161P Hartley/IRAS appears to be an object of similar type. Thanks to the large amount of observational data for these two comets, we tested various models of cometary non-gravitational forces applied to their dynamics. The goal was to estimate which of non-gravitational perturbations could affect the stability of retrograde bodies. In principle, we study the local stability by measuring the divergence of nearby orbits. We numerically determined Lyapunov characteristic indicators (LCI) and the associated Lyapunov times (LT). This time, our calculations were extended by more advanced models of non-gravitational perturbations (i.e. Yarkovsky drift and in selected cases cometary forces). This allowed us to estimate chaos in the Lyapunov sense. We found that the Yarkovsky effect for obliquities of $γ=0^{\circ}$ and $γ=180^{\circ}$ can change the LT substantially. In most cases, for the prograde rotation, we received more stable solutions. Moreover, we confirmed the role of retrograde resonances in this process. Additionally, the studied cometary effects also significantly influence the long-term behaviour of the selected comets. The LT can reach values from 100 to over 1000 years. Conclusions. All of our results indicate that the use of models with non-gravitational effects for retrograde bodies is clearly justified.
description: Accepted for publication in Astronomy and Astrophysics, Dec 19, 2020
title: Bilderkrieger, oder: Wer fotografiert den Krieg?
Creators: name: Vowinckel, Annette
Publisher: name: ZZF - Centre for Contemporary History: Visual History
Year: 2014

description: Was der französische Kriegsfotograf Patrick Chauvel hier zum Ausdruck bringt, würden viele seiner Kollegen sicher unterschreiben. Wer einmal angefangen hat, Krieg zu fotografieren, kommt davon oft nicht mehr los – so zumindest berichten es viele der in diesem Band vertretenen Fotografinnen und Fotografen. Der von Michael Kamber zusammengestellte Band enthält 21 Gespräche mit 15 Männern und fünf Frauen, die in Kriegen von Vietnam bis Afghanistan fotografierten (Joao Silva ist mit zwei Gesprächen vertreten). Eingeteilt sind die Gespräche in die Komplexe „Mission“, „Krieg“ und „Narben“.
Fish size estimation in sea cages using a fish image capturing and sizing system
Creators: name: Shieh, Anthony
Publisher: name: University of British Columbia
Year: 2009

description: Field trials were conducted at three British Columbian Atlantic salmon farms to test the performance of a fish image capturing and sizing system (FICASS) against the presently used seine/dip netting technique. FICASS consisted of underwater video camera equipment combined with an S-VHS videorecorder and image processing equipment. Salmon farmers require a new, noninvasive, sampling method to obtain population average fish weight (kg) (AFWIKE) and standard deviation (kg) (SDWIK), because the current level of accuracy is +/- 20% of actual mean fish weight and is very invasive to the fish. Environmental, husbandry (i.e. grading, sorting, feeding histories), swimming and stocking characteristics were recorded and, whenever possible, related to the sizing results. FICASS was developed by a research group at Dr. Petrell's Fish Imaging Laboratory, Chemical and Bio-Resource Engineering Department, University of British Columbia. In the three cages of one kg-sized fish of low stocking density that formed uncompacted types of aggregations and had not been previously size sorted, the AFWIKEs obtained by FICASS changed with sampling position. In 13 out of 15 cages of fish (> 3 kg) which had been size sorted, the AFWIKEs obtained by FICASS did not significantly change with position. In cages of harvest-sized fish and size-sorted three kg-sized fish, AFWIKEs by FICASS varied with position if the fish were unfed. When 3 kg-sized fish had been previously size sorted, FICASS results agreed with seine/dip netting results in 11 out of 13 cages. When 1 kg-sized fish were tightly schooling together, FICASS results was agreed with seine/dip netting results in 4 out of 6 cages sampled. Generally FICASS results agreed with seine/dip netting results when size un-sorted and unfed fish were videotaped at the top of aggregation (4 of 5 positions). FICASS results agreed with harvest data either when fish had been previously size sorted or fed as scheduled, and when sized-unsorted and unfed fish were videotaped in the middle or bottom of a loose, swimming aggregation. In general, different feeding and sorting schedules, and stocking conditions appeared to promote the incidence of sub-populations characterized by size within a sea cage. Ideally fish sizing should occur when the population size is randomized. FICASS can be used as an effective sizing tool because it can be used to non-invasively detect subpopulations, and if detected, the fish sizing could be repeated at a latter date when fish conditions become more randomized.
Η Διάκριση των διοικητικών διαφορών σε ουσίας και ακυρώσεως
Creators: name: Καλαϊτζάκης, Αντώνιος Χαρίλαου
Publisher: name: Aristotle University of Thessaloniki
Year: 2012
Subjects: Διαφορές
Ουσίας
Ακυρώσεως
Disputes
Substantive
In law

description: Σκοπός της διπλωματικής ήταν να αναλύσουμε τη διάκριση των διοικητικών διαφορών σε ουσίας και ακυρώσεως, τα κριτήρια με τα οποία γίνεται η διάκριση αυτή και τη σημασία της. Στα πλαίσια της κατανομής των εξουσιών και της διεύρυνσης της δικαιοδοσίας των διοικητικών δικαστηρίων, και ακολουθώντας το παράδειγμα της γαλλικής έννομης τάξης, ο συντακτικός νομοθέτης διακρίνει τις διοικητικές διαφορές σε ακυρωτικές και ουσίας, αρχικά χρησιμοποιώντας τη μέθοδο της γενικής ρήτρας και στη συνέχεια απαλείφοντας την. Ως κριτήρια διάκρισης έχουν χρησιμοποιηθεί κατά καιρούς, το ουσιαστικό, το ποσοτικό, το ερμηνευτικό και το κρατούν κριτήριο, το τυπικό. Εκτός από τους θεωρητικούς, και τα δικαστήρια της χώρας έχουν επιχειρήσει να προσδώσουν έναν ορισμό της διάκρισης και να διευκρινίσουν τη σημασία της, ωστόσο, και παρά τα εκατέρωθεν πλεονεκτήματα και μειονεκτήματα, των δύο ειδών ελέγχου, ήτοι του ακυρωτικού και του ουσιαστικού, παρατηρείται τελευταία μια τάση σύγκλησης των αυτών μορφών ελέγχου. Με χαρακτηριστικότερο το νομολογιακό παράδειγμα της απόφασης της Ολομέλειας του Συμβουλίου της Επικρατείας 189/2007, υπάρχουν πλείονα νομολογιακά παράδοξα τα οποία αποδεικνύουν τη δυσχέρεια της διάκρισης αυτής και καταδεικνύουν ως απαραίτητη την ανά περίπτωση επέμβαση του Συμβουλίου της Επικρατείας για την κατανομή των επί μέρους διαφορών στον ακυρωτικό ή τον ουσιαστικό δικαστή.
description: The aim of the thesis was to analyze the specific distinction of administrative disputes between those in substance and those in law, the criteria that this distinction is based upon and its significance. Within the division of authorities and the expansion of the jurisdiction of administrative courts, and by following the example of the French legal system, the legislator distinguishes the administrative disputes between those in substance and those in law, initially by using the general clause and then by eliminating it. As discrimination criteria, the substance, the quantity, the interpretation and the formality, which is the most valid criterion, have been used at times Apart from theoretical academics, the courts of the country have also attempted to give a definition of the discrimination and to explain its significance, however, and in spite of the advantages and disadvantages of both types of control, namely the Cancellation and effective, recently, those two forms of control tend to converge. With that precedent typical example of SteOl 189/2007, there are several jurisprudential paradoxes that show the difficulty of this distinction and impose the necessity of a selective intervention of the State Council on the allocation of individual disputes to the effective or annulment judge.
Detecting Bookmaker Odds Mistakes Using Linear Algebra and Statistical Methods
Creators: name: Govindasamy, Ashlin
Publisher: name: Zenodo
Year: 2024
Subjects: Bookmaker Odds
Linear Algebra
Statistical Methods
Machine Learning
Partial Differentials
Outlier Detection
Sports Betting
Mahalanobis Distance
Principal Component Analysis

description: Bookmakers occasionally set incorrect odds, leading to arbitrage opportunities or potential financial loss. This paper presents a mathematical framework using linear algebra, partial differential equations, and statistical methods to detect outliers in bookmakers’ odds across multiple dimensions. We derive new formulas utilizing machine learning techniques and partial differentials to analyze and adjust bets. An example is provided to illustrate the detection of an outlier bookmaker. It is also noted that bookmakers reserve the right to revert bets in case of mistakes, as per their terms and conditions.
Quantum Thermodynamics and Quantum Coherence Engines
Creators: name: Tuncer, Aslı
name: Müstecaplioğlu, Özgür E.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Advantages of quantum effects in several technologies, such as computation and communication, have already been well appreciated, and some devices, such as quantum computers and communication links, exhibiting superiority to their classical counterparts have been demonstrated. The close relationship between information and energy motivates us to explore if similar quantum benefits can be found in energy technologies. Investigation of performance limits for a broader class of information-energy machines is the subject of the rapidly emerging field of quantum thermodynamics. Extension of classical thermodynamical laws to the quantum realm is far from trivial. This short review presents some of the recent efforts in this fundamental direction and focuses on quantum heat engines and their efficiency bounds when harnessing energy from non-thermal resources, specifically those containing quantum coherence and correlations.
description: 38 pages, 22 figures
PIDs in IIIF Webinar
Creators: name: Brumfield, Ben
name: Brumfield, Sara
name: Irving, Andy
name: Kotarski, Rachael
name: Padfield, Joseph
name: Raemy, Julien
name: McLaughlin, Anne
name: Madden, Frances
Publisher: name: Zenodo
Year: 2021
Subjects: IIIF
PID

description: Designed as a seminar to discuss the opportunities and challenges associated with embedding Persistent Identifiers (PIDs) in IIIF resources, this seminar brought together experts in both fields to discuss the potentials for wider implementation of PIDs within the IIIF Framework. The emergence of the International Image Interoperability Framework (IIIF) has presented researchers with an opportunity to annotate and cite digitised or digital resources. However, many of the creative and scholarly uses of IIIF are stymied by an inability to reliably and persistently link to objects or collections of objects. Persistent identifiers are long lasting, digital references to resources, whether physical or digital, including objects published in IIIF. The second webinar hosted by the Practical Applications of IIIF Project, highlighted the need for the ability to be able to consistently identify objects or collections of objects in IIIF. Both the Practical IIIF and Heritage PIDs projects are actively gathering use cases on this topic to understand community needs in this area. Some initial use cases and issues the projects identified include: The ability to assign a PID for collection level manifests to showcase and present areas of a collection The ability to identify IIIF manifests with a PID, both static and dynamic The ability to create PIDs for user generated manifests, collections and annotations The ability to update existing IIIF manifests with PIDs to reflect new imaging or updated metadata. This seminar provided an occasion for a panel of international experts to discuss the opportunities and challenges these use cases present and suggest a way forward for individual implementations and the framework as a whole. Panellists : Ben and Sara Brumfield ( FromThePage), Andy Irving (Bodleian Libraries), Rachael Kotarski (British Library), Joseph Padfield (National Gallery) and Julien Raemy (University of Basel and DaSCH). Agenda Introduction to topic and panelists Description of use cases followed by comments from panelists Q&A and Discussion This seminar is co-organised by Practical Applications of IIIF and Persistent Identifiers as IRO infrastructure (Heritage PIDs) both foundation projects in the Towards a National Collection programme.
description: The event which is documented in this data set has been written up in a blog: https://tanc-ahrc.github.io/HeritagePIDs/PIDs%20and%20IIIF.html
Classical field techniques for condensates in one-dimensional rings at finite temperatures
Creators: name: Nunnenkamp, A.
name: Milstein, J. N.
name: Burnett, K.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: For a condensate in a one-dimensional ring geometry, we compare the thermodynamic properties of three conceptually different classical field techniques: stochastic dynamics, microcanonical molecular dynamics, and the classical field method. Starting from non-equilibrium initial conditions, all three methods approach steady states whose distribution and correlation functions are in excellent agreement with an exact evaluation of the partition function in the high-temperature limit. Our study helps to establish these various classical field techniques as powerful non-perturbative tools for systems at finite temperatures.
description: 7 pages, 7 figures; minor changes, one reference added
Identified Particle Jet Correlations from PHENIX
Creators: name: Sickles, Anne
Publisher: name: arXiv
Year: 2007
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: Two-particle azimuthal correlations have been shown to be a powerful probe for extracting novel features of the interaction between hard scattered partons and the medium produced in Au+Au collisions at RHIC. At intermediate $p_T$, 2-5GeV/c, jets have been shown to be significantly modified in both particle composition and angular distribution compared to p+pcollisions. We present recent PHENIX results from Au+Au collisions for a variety of $p_T$ and particle combinations.
description: Parallel talk given at Quark Matter 2006, Shanghai China
Ultramassive black holes in the most massive galaxies: $M_{\rm BH}-σ$ versus $M_{\rm BH}-R_{\rm b}$
Creators: name: Dullo, Bililign T.
name: de Paz, Armando Gil
name: Knapen, Johan H.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: [Abridged] We investigate the nature of the relations between black hole (BH) mass ($M_{\rm BH}$) and the central velocity dispersion ($σ$) and, for core-Sérsic galaxies, the size of the depleted core ($R_{\rm b}$). Our sample of 144 galaxies with dynamically determined $M_{\rm BH}$ encompasses 24 core-Sérsic galaxies, thought to be products of gas-poor mergers, and reliably identified based on high-resolution HST imaging. For core-Sérsic galaxies -- i.e., combining normal-core ($R_{\rm b} < 0.5 $ kpc) and large-core galaxies ($R_{\rm b} \gtrsim 0.5$ kpc), we find that $M_{\rm BH}$ correlates remarkably well with $R_{\rm b}$ such that $M_{\rm BH} \propto R_{\rm b}^{1.20 \pm 0.14}$ (rms scatter in log $M_{\rm BH}$ of $Δ_{\rm rms} \sim 0.29$ dex), confirming previous works on the same galaxies except three new ones. Separating the sample into Sérsic, normal-core and large-core galaxies, we find that Sérsic and normal-core galaxies jointly define a single log-linear $M_{\rm BH}-σ$ relation $M_{\rm BH} \propto σ^{ 4.88 \pm 0.29}$ with $Δ_{\rm rms} \sim 0.47$ dex, however, at the high-mass end large-core galaxies (four with measured $M_{\rm BH}$) are offset upward from this relation by ($2.5-4) \times σ_{\rm s}$, explaining the previously reported steepening of the $M_{\rm BH}-σ$ relation for massive galaxies. Large-core spheroids have magnitudes $M_{V} \le -23.50$ mag, half-light radii Re $>$ 10 kpc and are extremely massive $M_{*} \ge 10^{12}M_{\odot}$. Furthermore, these spheroids tend to host ultramassive BHs ($M_{\rm BH} \ge 10^{10}M_{\odot}$) tightly connected with their $R_{\rm b}$ rather than $σ$. The less popular $M_{\rm BH}-R_{\rm b}$ relation exhibits $\sim$ 62% less scatter in log $M_{\rm BH}$ than the $M_{\rm BH}- σ$ relations.
description: 11 pages, 4 figures, accepted (2020, November 27) for publication in ApJ
Kodaira dimension and symplectic sums
Creators: name: Usher, Michael
Publisher: name: arXiv
Year: 2007
Subjects: subject: Symplectic Geometry (math.SG)
subject: Geometric Topology (math.GT)
subject: FOS: Mathematics
subject: 57R17

description: Modulo trivial exceptions, we show that smoothly nontrivial symplectic sums of symplectic 4-manifolds along surfaces of positive genus are never rational or ruled, and we enumerate each case in which they have Kodaira dimension zero (i.e., are blowups of symplectic 4-manifolds with torsion canonical class). In particular, a symplectic four-manifold of Kodaira dimension zero arises by such a surgery only if it is diffeomorphic to a blowup either of the K3 surface, the Enriques surface, or a member of a particular family of T^2-bundles over T^2 each having b_1=2.
description: Minor changes based on referee's comments. To appear in Comment. Math. Helv. 23 pages
Ζωγραφική πράξη και οπτική αντίληψη κατά τον Richard Wollheim
Creators: name: Μιτσέλης, Παναγιώτης Χρήστου-Ανέστη
Publisher: name: Aristotle University of Thessaloniki
Year: 2012
Subjects: Βολχάϊμ
Ζωγραφική
Τέχνη
Wollheim
Painting
Art

description: Η παρούσα διπλωματική εργασία βασίζεται στην ανάλυση του Richard Wollheim, στη σχέση που δημιουργείται ανάμεσα στον καλλιτέχνη και τον θεατή και τις ψυχολογικές διεργασίες που αναπτύσσονται κατά τη διάρκεια της δημιουργίας και της θέασης ενός έργου τέχνης. Εξετάζοντας τις διάφορες αισθητικές θεωρίες, τα διαφορετικά ζωγραφικά στυλ, θα προσπαθήσουμε να συνθέσουμε ένα γενικό περίγραμμα γύρω από το πώς αποκωδικοποιείται σταδιακά ένα έργο τέχνης και συγκεκριμένα ένας ζωγραφικός πίνακας. Η φιλοσοφία της τέχνης σε συνδυασμό με την ιστορία της τέχνης μέσω πολύ σημαντικών εκπροσώπων της προσπάθησε να αναλύσει και να εξηγήσει ορισμένες οντολογικές έννοιες γύρω από τη δημιουργία της τέχνης
description: The present thesis is based on the analysis of Richard Wollheim, the relationship created between the artist and the viewer, and the psychological processes that develop during the creation and viewing a work of art. Looking at the various aesthetic theories, different painting styles, we try to compose an outline around how we can decode and analyze an artwork and more particularly a painting. The philosophy of art in conjunction with the history of art through very important representatives attempted to analyze and explain some ontological concepts involving the creation of art.
Toward Cosmicflows-4: The \hi data catalog
Creators: name: Dupuy, A.
name: Courtois, H. M.
name: Guinet, D.
name: Tully, R. B.
name: Kourkchi, E.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: In this study, we present an update of a compilation of line width measurements of neutral atomic hydrogen (HI) galaxy spectra at 21 cm wavelength. Our All Digital HI (ADHI) catalog consists of the previous release augmented with our new HI observations and an analysis of archival data. This study provides the required HI information to measure the distances of spiral galaxies through the application of the Tully-Fisher (TF) relation. We conducted observations at the Green Bank telescope (GBT) and reprocessed spectra obtained at the Nancay radiotelescope by the Nancay Interstellar Baryons Legacy Extragalactic Survey (NIBLES) and Kinematics of the Local Universe (KLUN) collaborations and we analyzed the recently published full completion Arecibo Legacy Fast ALFA (ALFALFA) 100% survey in order to identify galaxies with good quality HI line width measurements. This paper adds new HI data adequate for TF use for 385 galaxies observed at GBT, 889 galaxies from archival Nancay spectra, and 1,515 rescaled Arecibo ALFALFA spectra. In total, this release adds 1,274 new good quality measurements to the ADHI catalog. Today, the ADHI database contains 18,874 galaxies, for which 15,433 have good quality data for TF use. The final goal is to compute accurate distances to spiral galaxies, which will be included in the next generation of peculiar velocities catalog: Cosmicflows-4.
description: 9 pages, 8 figures, 4 tables, accepted for publication in Astronomy & Astrophysics
Προβλήματα Γραπτού Λόγου στην Δεύτερη/Ξένη Γλώσσα Παιδιών με Χαμηλή Σχολική Επάρκεια.:
Creators: name: Νουμεροπούλου, Σεβαστή-Τσαμπίκα Σταύρου
Publisher: name: Aristotle University of Thessaloniki
Year: 2012
Subjects: Αγγλικά σαν δεύτερη / ξένη Γλώσσα
Μαθησιακές δυσκολίες
Αφηγηματικές δεξιότητες
Θεωρίες απόκτησης ξένης γλώσσας
Learning English as a second /foreign language
Learning disabilities
Νarrative skills
theories of language acquisition

description: Ο εκπαιδευτικός της αγγλικής , μέσα στις ελληνικές τάξεις , έχει να αντιμετωπίσει πολλές εκπαιδευτικές προκλήσεις. Η συνηθέστερη από αυτές είναι να διδάξει μέσα σε εξαιρετικά ανομοιογενείς τάξεις. Ένα τέτοιο φαινόμενο θα μπορούσε να αντιμετωπιστεί, αν από τον μαθητικό πληθυσμό που παρουσιάζει χαμηλή σχολική επίδοση μπορούσαμε να ξεχωρίσουμε τα παιδιά εκείνα που η δυσκολία τους οφείλεται σε κάποιο είδος Eιδικών Mαθησιακών Δυσκολιών, από τα παιδιά που απλά παρουσιάζουν χαμηλή σχολική επάρκεια που όμως δεν οφείλεται σε Ειδικές Μαθησιακές Δυσκολίες, ώστε να εφαρμοστεί ένα ποιοτικά διαφορετικό πρόγραμμα διδασκαλίας. Για τον σκοπό αυτό και προκειμένου να σταθμιστεί η γλωσσική και μαθησιακή τους επάρκεια χορηγήσαμε δύο ψυχομετρικά κριτήρια το «Λ-α-Τ-ω» και το “Detroit” αντίστοιχα και ζητήθηκε η αναπαραγωγή κειμένου σε αφηγηματικό γραπτό λόγο για να μπορέσουμε να ελέγξουμε όλες τις πτυχές του προβλήματος όσο είναι αυτό δυνατό .Τα αποτελέσματα αναδεικνύουν ένα μοντέλο συνδυασμού λαθών διαφορετικό για τις δύο ομάδες . Φυσικά και είναι αναγκαίο να διερευνηθεί περισσότερο η διαπίστωση αυτή και κάτι τέτοιο προτείνεται από εμάς.
description: The English Second Language teacher (ESL), in Greek classrooms, must contend with numerous teaching challenges. The most common of these is that of teaching in incredibly inhomogeneous classes. Such a phenomenon could be dealt with if the student population displaying low performance were separated into those whose difficulty is due to a Specific Learning Disability and those whose low performance is not due to a Specific Learning Disability, so that a more suitable teaching programme could be implemented. For this reason and in order to grade their linguistic and learning proficiency, two psychometric tests, ( L-a-T-o and Detroit tests) were respectively administered. Further, it was asked of the students to produce a narrative text in order to check all facets of the problem, in so much as it is possible. The results indicate a model of a combination of errors different for the two groups. It is of course necessary to further explore this ascertainment and this is what is proposed by us.
$R$-matrix type parametrization of the Jost function for extracting the resonance parameters from scattering data
Creators: name: Vaandrager, P.
name: Lekala, M. L.
name: Rakityansky, S. A.
Publisher: name: arXiv
Year: 2025
Subjects: subject: Quantum Physics (quant-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: A new method is proposed for fitting non-relativistic binary-scattering data and for extracting the parameters of possible quantum resonances in the compound system that is formed during the collision. The method combines the well-known $R$-matrix approach with the analysis based on the semi-analytic representation of the Jost functions. It is shown that such a combination has the advantages of both these approaches, namely, the number of the fitting parameters remains relatively small (as for the $R$-matrix approach) and the proper analytic structure of the $S$-matrix is preserved (as for the Jost function method). It is also shown that the new formalism, although closely related to the $R$-matrix method, has the benefit of no dependence on an arbitrary channel radius. The efficiency and accuracy of the proposed method are tested using a model single-channel potential. Artificial ``experimental'' data generated with this potential are fitted, and its known resonances are successfully recovered as zeros of the Jost function on the appropriate sheet of the Riemann surface of the energy.
Nonradial oscillations of slowly and differentially rotating compact stars
Creators: name: Stavridis, Adamantios
name: Passamonti, Andrea
name: Kokkotas, Kostas
Publisher: name: arXiv
Year: 2007
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The equations describing nonradial adiabatic oscillations of differentially rotating relativistic stars are derived in relativistic slow rotation approximation. The differentially rotating configuration is described by a perturbative version of the relativistic j-constant rotation law. Focusing on the oscillation properties of the stellar fluid, the adiabatic nonradial perturbations are studied in the Cowling approximation with a system of five partial differential equations. In these equations, differential rotation introduces new coupling terms between the perturbative quantites with respect to the uniformly rotating stars. In particular, we investigate the axisymmetric and barotropic oscillations and compare their spectral properties with those obtained in nonlinear hydrodynamical studies. The perturbative description of the differentially rotating background and the oscillation spectrum agree within a few percent with those of the nonlinear studies.
description: 18 pages, 5 figures, ReVTeX 4.0, submitted to Phys. Rev. D
Off-shell N=2 tensor supermultiplets
Creators: name: de Wit, Bernard
name: Saueressig, Frank
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: A multiplet calculus is presented for an arbitrary number n of N=2 tensor supermultiplets. For rigid supersymmetry the known couplings are reproduced. In the superconformal case the target spaces parametrized by the scalar fields are cones over (3n-1)-dimensional spaces encoded in homogeneous SU(2) invariant potentials, subject to certain constraints. The coupling to conformal supergravity enables the derivation of a large class of supergravity Lagrangians with vector and tensor multiplets and hypermultiplets. Dualizing the tensor fields into scalars leads to hypermultiplets with hyperkahler or quaternion-Kahler target spaces with at least n abelian isometries. It is demonstrated how to use the calculus for the construction of Lagrangians containing higher-derivative couplings of tensor multiplets. For the application of the c-map between vector and tensor supermultiplets to Lagrangians with higher-order derivatives, an off-shell version of this map is proposed. Various other implications of the results are discussed. As an example an elegant derivation of the classification of 4-dimensional quaternion-Kahler manifolds with two commuting isometries is given.
description: 36 pages
Transition time estimation for $δ$-function coupling in two state problem: An analytically solvable model
Creators: name: Vashistha, Mayank
name: Samanta, Chinmoy
name: Chakraborty, Aniruddha
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We propose a simple method to calculate transition time in a two-state scattering problem, where two constant potentials are coupled by a delta function potential $V_{12}=V_{21}=k_0 δ(x)$. The exact analytical expression for the time of transition $τ$ is derived. We notice $τ$ explicitly depends on the second state's potential energy along with the incident energy and coupling strength. We also observe from the derived expression of $τ$ that depending on the initial energy, the coupling potential could behave like a transparent or opaque medium to the incident wave in a single state equivalent description.
Effect of intrinsic spin relaxation on the spin-dependent cotunneling transport through quantum dots
Creators: name: Weymann, Ireneusz
name: Barnas, Józef
Publisher: name: arXiv
Year: 2006
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Spin-polarized transport through quantum dots is analyzed theoretically in the cotunneling regime. It is shown that the zero-bias anomaly, found recently in the antiparallel configuration, can also exist in the case when one electrode is magnetic while the other one is nonmagnetic. Physical mechanism of the anomaly is also discussed. It is demonstrated that intrinsic spin relaxation in the dot has a significant influence on the zero-bias maximum in the differential conductance -- the anomaly becomes enhanced by weak spin-flip scattering in the dot and then disappears in the limit of fast spin relaxation. Apart from this, inverse tunnel magnetoresistance has been found in the limit of fast intrinsic spin relaxation in the dot. The diode-like behavior of transport characteristics in the cotunneling regime has been found in the case of quantum dots asymmetrically coupled to the leads. This behavior may be enhanced by the spin-flip relaxation processes.
description: 10 pages, 6 figures
On the extended Kolmogorov-Nagumo information-entropy theory, the q -> 1/q duality and its possible implications for a non-extensive two dimensional Ising model
Creators: name: Masi, Marco
Publisher: name: arXiv
Year: 2006
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: The aim of this paper is to investigate the q -> 1/q duality in an information-entropy theory of all q-generalized entropy functionals (Tsallis, Renyi and Sharma-Mittal measures) in the light of a representation based on generalized exponential and logarithm functions subjected to Kolmogorov's and Nagumo's averaging. We show that it is precisely in this representation that the form invariance of all entropy functionals is maintained under the action of this duality. The generalized partition function also results to be a scalar invariant under the q -> 1/q transformation which can be interpreted as a non-extensive two dimensional Ising model duality between systems governed by two different power law long-range interactions and temperatures. This does not hold only for Tsallis statistics, but is a characteristic feature of all stationary distributions described by q-exponential Boltzmann factors.
description: 13 pages, accepted for publication in Physica A
Διπολική Ροπή και Επίδραση Εξωτερικά Εφαρμοζόμενου Ηλεκτρικού Πεδίου στα Διατομικά Μόρια των Υδραλογόνων: Μία προσέγγιση με βάση τη Θεωρία Δεσμού - Σθένους:
Creators: name: Αντώνογλου, Λεμονιά Δημητρίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2012
Subjects: Διπολική ροπή
Υβριδισμός
Ηλεκτρικό πεδίο
Dipole moment
Hybridization
Electric Field

description: Στην παρούσα διπλωματική εργασία αναπτύσσεται και προτείνεται για τη διδασκαλία και τη μάθηση της Χημείας ένα μοντέλο για την περιγραφή και την ερμηνεία της πολικότητας των διατομικών μορίων όπως τα υδραλογόνα, HF, HCl και HBr, μέτρο της οποίας είναι η διπολική ροπή, με βάση τη Θεωρία Δεσμού - Σθένους. Το σημαντικό πλεονέκτημα αυτού μοντέλου έναντι του πλέον χρησιμοποιούμενου μοντέλου που βασίζεται στη διαφορά ηλεκτροαρνητικότητας των στοιχείων είναι ότι, εκτός από την περιγραφή και την ερμηνεία της εμφανιζόμενης διπολικής ροπής στα διατομικά μόρια των υδραλογόνων, επιτρέπει την πρόβλεψη και την κατανόηση των αλλαγών που υφίστανται αυτά τα πολωμένα διατομικά μόρια λόγω της επίδρασης εξωτερικά εφαρμοζόμενου ηλεκτρικού πεδίου. Το επιστημονικό/ εκπαιδευτικό μοντέλο που παρουσιάζεται επιτρέπει την παρακολούθηση των αλλαγών στα ετεροπυρηνικά διατομικά μόρια ΗΑ (ως Α αναπαρίσταται ένα άτομο αλογόνου όπως F, Cl και Br) υπό την επίδραση ενός πεδίου με ευνοϊκό ή μη ευνοϊκό προσανατολισμό και με διάφορες τιμές στην ένταση του.
description: In the present study an alternative model for the teaching and learning of the concept of dipole moment in a heteronuclear diatomic molecule is presented. Considering that the predominant description and explanation of dipole moment in teaching chemistry which is based on the difference between substituents’ electronegativity confronts many limitations we have proceeded to the investigation and development of an alternative scientific/ educational model. The proposed model which is based on Valence Bond Theory provides a complete description and interpretation of the σ-bond dipole in diatomic molecules such as the representatives of halides, HF, HCl and HBr. The significance and the superiority of this model is its ability to predict the influence of an electric field with diverse strength and orientation on the polarity of the diatomic molecules, HA (A represents a halogen atom such as F, Cl and Br).
Paramagnon-induced dispersion anomalies in the cuprates
Creators: name: Markiewicz, R. S.
name: Sahrakorpi, S.
name: Bansil, A.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We report the self-energy associated with RPA magnetic susceptibility in the hole-doped Bi_2Sr_2CuO_6 (Bi2201) and the electron-doped Nd_{2-x}Ce_xCuO_4 (NCCO) in the overdoped regime within the framework of a one-band Hubbard model. Strong weight is found in the magnetic spectrum around (pi, 0) at about 360 meV in Bi2201 and 640 meV in NCCO, which yields dispersion anomalies in accord with the recently observed `waterfall' effects in the cuprates.
description: Submitted to PRL, Dec. 21, 2006; 4 eps figures, revtex