cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
title: Ποσοτική ανάλυση μπεντονιτών από Ελλάδα και ΗΠΑ με τη μέθοδο Rietveld
Creators: name: Τσουβαλας Δημητριος
Publisher: name: Technical University of Crete
Year: 2019

description: Η ποσοτικοποίηση των αναλυτικών αποτελεσμάτων, παίζει σημαντικό ρόλο στο χαρακτηρισμό ενός υλικού και στην περαιτέρω ανάπτυξη των εφαρμογών του. Στα πλαίσια της παρούσας διατριβής, μελετήθηκε η συμμετοχή των διαφόρων ορυκτών φάσεων σε μπεντονίτεςαπό την Ελλάδα και την Αμερική, με τη χρήση της αναλυτικής μεθόδου της περιθλασιμετρίας των ακτινών-Χ (XRD), σε συνδυασμό με τη μέθοδο Rietveld. Τα αποτελέσματα των μετρήσεων εκτιμήθηκαν ποιοτικά και ποσοτικά με τη χρήση των λογισμικών EVAκαι Autoquan. Με βάση τηνερμηνεία των πειραματικών δεδομένων οι μπεντονίτες από την Ελλάδα, περιέχουν ποσοστάσμεκτίτη που ξεπερνούν το 90%, και μπορούν να χαρακτηρισθούν σαν υψηλής καθαρότητας, καθώς περιέχουν μόνο 5 ορυκτές φάσεις. Οι ιδιότητες αυτές καθιστούν τους ελληνικούς μπεντονίτες καλύτερους για εφαρμογέςμεταλλουργίας, γεωτρήσεων και κεραμικής από τα εξετασθέντα δέιγματα με προέλευση τις Ηνωμένες Πολιτείες της Αμερικής
description: The quantification of analytical results is crucial for material characterization and further development of applications. In the framework of the present dissertation, the partitioning of different mineral phases in Greek and American bentonites, was investigated by the means of X-ray diffracrion (XRD), combined with the Rietveld method. The results, were both qualitatively and quantitatively evaluated with the utilization of EVA and Autoquan softwere packages.The interpretation of the experimental results, pointed that Greek bentonites, contain up to 90% smectite, and can be characterized as high purity materials, as they contain only 5 mineral phases.These properties make Greek bentonites more suitable for industrial application related with metallurgy, drilling and ceramics, compared with the studied samples from the United States of America.
LHC diphoton and Z+photon Higgs signals in the Higgs triplet model with Y=0
Creators: name: Wang, Lei
name: Han, Xiao-Fang
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We study the implications of the LHC diphoton and Z+photon Higgs signals on the Higgs triplet model with Y=0. We discuss three different scenarios: (i) the observed boson is the light Higgs boson $h$; (ii) it is the heavy Higgs boson $H$; (iii) the observed signal is from the almost degenerate $h$ and $H$. We find that the inclusive Higgs diphoton rates in the first two scenarios can be enhanced or suppressed compared to the SM value, which can respectively fit the ATLAS and CMS diphoton data within $1σ$ range. The inclusive $ZZ^*$ rates are suppressed, which are outside $1σ$ range of ATLAS data and within $1σ$ range of CMS data. Meanwhile, another CP-even Higgs boson production rate can be suppressed enough not to be observed at the collider. For the third scenario, the Higgs diphoton rate is suppressed, which is outside $1σ$ range of ATLAS data, and the $ZZ^*$ rate equals to SM value approximately. In addition, we find that the two rates of $h\to γγ$ and $h\to Zγ$ have the positive correlations for the three scenarios.
description: 16 pages, 8 figures. Update of Higgs data, references added. Final version appeared in JHEP
title: Sesmic reflection survey design for imaging the surfaces of deep sea enviroment south of Crete
title: Σχεδιασμός πειράματος σεισμικής ανάκλασης για την απεικόνιση του υπεδάφους σε περιβάλλον βαθιάς θάλασσας νότια της Κρήτης
Creators: name: Χριστιδη Βασιλικη-Λουϊζα
Publisher: name: Technical University of Crete
Year: 2019

description: Το αντικείμενο της παρούσας διπλωματικής εργασίας είναι η προσομοίωση σεισμικού πειράματος και η παραγωγή συνθετικών δεδομένων σεισμικής ανάκλασης χρησιμοποιώντας γεωλογικό μοντέλο που αντιστοιχεί στην θαλάσσια περιοχή νότια της Κρήτης. Από την επεξεργασία των συνθετικών δεδομένων προέκυψαν οι σεισμικές τομές χωροθέτησης οι οποίες υπερτέθηκαν στο μοντέλο τμηματικών ταχυτήτων (Interval velocity model) και ακολούθησε η γεωλογική ερμηνεία με τη βοήθεια δημοσιευμένων εργασιών στην περιοχή μελέτης, κατά την οποία τα σεισμικά στρώματα αποδόθηκαν σε γεωλογικούς σχηματισμούς.
Για τη δημιουργία των συνθετικών δεδομένων χρησιμοποιήθηκε το πρόγραμμα Matlab και ο αλγόριθμος PSV_SYNTHETICS ο οποίος αναπτύχθηκε στο  Εργαστήριο Εφαρμοσμένης Γεωφυσικής της Σχολής Μηχανικών Ορυκτών Πόρων του Πολυτεχνείου Κρήτης.
Εφαρμόστηκαν τρεις μέθοδοι σεισμικής χωροθέτησης. Η μέθοδος Χωροθέτησης Kirchhoff, η μέθοδος χωροθέτησης Πεπερασμένων διαφορών (Finite differences), καθώς και η μέθοδος Μετατόπισης φάσης (Phase shift).
Εν κατακλείδι, από την σύγκριση της σεισμικής τομής με το γεωλογικό μοντέλο, προκύπτει ότι η σεισμική χωροθέτηση επανατοποθετηθεί τους ανακλαστήρες  στην σωστή τους θέση και  απεικονίζει δομές στο υπέδαφος με πολύ καλή  ακρίβεια.
Reviewing HIV‐Related Research in Emerging Economies: The Role of Government Reviewing Agencies
Creators: name: Sexton, Patrina
name: Hui, Katrina
name: Hanrahan, Donna
name: Barnes, Mark
name: Sugarman, Jeremy
name: London, Alex John
name: Klitzman, Robert L.
Publisher: name: Columbia University
Year: 2016
Subjects: Research--Moral and ethical aspects
Institutional review boards (Medicine)
Medical ethics
HIV (Viruses)--Research
Developing countries

description: Little research has explored the possible effects of government institutions in emerging economies on ethical reviews of multinational research. We conducted semi‐structured, in‐depth telephone interviews with 15 researchers, Research Ethics Committees (RECs ) personnel, and a government agency member involved in multinational HIV Prevention Trials Network (HPTN ) research in emerging economies. Ministries of Health (MOH ) or other government agencies often play pivotal roles as facilitators or barriers in the research ethics approval process. Government agency RECs reviewing protocols may face particular challenges, as they can lack resources, be poorly organized, have inconsistent review processes and limited expertise, and use differing definitions of national interests, including upholding national reputation and avoiding potential exploitation and stigma of the country's population. The MOH /governmental review body may be affected by power dynamics and politics in study reviews; may consider issues both related and unrelated to research ethics as understood elsewhere; and may prioritize particular diseases, treatments, or interventions over other topics/types of research. Poor communication and deeply‐rooted tensions may exist between sponsor and host countries, impeding optimal interactions and reviews. Investigators must understand and plan for the potential effects of governmental agencies on multinational collaborative research, including preserving adequate time for agency review, and contacting these agencies beforehand to address issues that may arise. Better understanding of these issues can aid and advance appropriate global scientific collaboration.
The Thompson-Lyons transfer lemma for fusion systems
Creators: name: Lynd, Justin
Publisher: name: arXiv
Year: 2013
Subjects: subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: 20D20

description: In this note, a generalization of the Thompson transfer lemma and its various extensions, most recently due to Lyons, is proven in the context of saturated fusion systems. A strengthening of Alperin's fusion theorem is also given in this setting, following Alperin's own "up and down" fusion.
description: v1, 7 pages; comments welcome. v2, main theorem restated in stronger form, minor fixes. To appear in Bull. Lond. Math. Soc
Volker Henning Drecoll (Hrsg.), Augustin Handbuch
Creators: name: Schmitz, Dietmar
Publisher: name: Forum Classicum
Year: 2017

description: Rezension zu: Volker Henning Drecoll (Hrsg.), Augustin Handbuch. Mohr Siebeck: Tübingen 2007. (ISBN 978-3-16-148269-4).
description: Forum Classicum, Nr. 2 (2009): Forum Classicum
Strong seasonal effects and long-term weather-related factors drive the temporal variability of airborne pollen in the atmosphere of San Miguel de Tucumán, Argentina
Creators: name: García, María Elena
name: Reyes, Nora Julieta
name: Espeche, Maria Laura
name: Ordano, Mariano
name: Lamelas, Cesar
name: Forciniti, Jorge
name: Gómez, Maria Lorena Soulé
Publisher: name: Taylor & Francis
Year: 2021
Subjects: subject: Biophysics
subject: Biochemistry
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 20199 Astronomical and Space Sciences not elsewhere classified
subject: FOS: Physical sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Developmental Biology
subject: Cancer
subject: Plant Biology

description: Knowledge about variations in allergenic pollen in the atmosphere is essential for human health programmes. This study aims to evaluate the influence of climatic variability on the arboreal pollen (AP) load, considering the annual, seasonal and intra-diurnal variability during ten years. We obtain data using a volumetric Burkard spore trap in San Miguel de Tucumán city. The seasonal behaviour of AP showed a short and intense flowering period from August to October. However, annual pollen concentrations varied considerably with 2008 and 2012 the years with the lowest and highest pollen contributions, respectively. The qualitative composition of the AP was represented mainly by Broussonetia papyrifera, Morus, Celtis, Alnus, Platanus, Fraxinus, Myrtaceae, Juglans and Salix. During the ten years of continuous sampling, there was little variation in the pollen concentration per hour. The lowest and highest contribution occurred at 2 p.m., and 2 a.m., respectively. There was a strong seasonal effect on AP concentration. Air temperature positively affected AP concentrations, while air humidity negatively affected AP concentrations. Overall, the shape and intensity of the seasonal AP pattern in this region appears to be driven by long-term phenological dynamics.
Why a Data Disclosure Law Is (Likely) Unconstitutional
Creators: name: Fiest, Max
Publisher: name: Columbia University
Year: 2020
Subjects: subject: Law
subject: FOS: Law
subject: Social media
subject: Disclosure of information--Law and legislation
subject: Freedom of speech
subject: Jurisprudence

description: Social media platforms have changed the very structure of communication. These platforms exert significant influence over how we get our news, how we form and join political movements, and how we connect with friends and family. But social media platforms are black boxes. Moderation algorithms are opaque--even to the platforms themselves—and attempts by third parties to research these algorithms are often frustrated. Because platforms withhold data necessary for public interest research, Congress might step in and mandate data access for certain researchers and journalists. I conclude that any such effort would (likely) be unconstitutional under the First Amendment. My purpose in this Note is twofold. First, I provide a framework for evaluating the constitutionality of a data disclosure law and explain which arguments are most likely to succeed. I also provide some analytical categories of platform data. These categories should help practitioners and policymakers evaluate the ways data disclosure might chill the free expression of platform users. Second, I explore how easily the First Amendment can be used to strike down economic regulations. Using a data disclosure law as an exhibit, I hope to illustrate and explain the Supreme Court's shifting understanding of free speech. My Note proceeds in four parts. Part I provides relevant background and outlines a hypothetical data disclosure law; Part II explores the many arguments regulated platforms could deploy to invalidate a data disclosure law; Part III provides a brief recommendation to legislators seeking to draft a data disclosure law; and I conclude in Part IV by arguing for a reinterpretation of free speech jurisprudenc
Density matrix quantum Monte Carlo
Creators: name: Blunt, N. S.
name: Rogers, T. W.
name: Spencer, J. S.
name: Foulkes, W. M. C.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Computational Physics (physics.comp-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We present a quantum Monte Carlo method capable of sampling the full density matrix of a many-particle system at finite temperature. This allows arbitrary reduced density matrix elements and expectation values of complicated non-local observables to be evaluated easily. The method resembles full configuration interaction quantum Monte Carlo but works in the space of many-particle operators instead of the space of many-particle wave functions. One simulation provides the density matrix at all temperatures simultaneously, from $T=\infty$ to $T=0$, allowing the temperature dependence of expectation values to be studied. The direct sampling of the density matrix also allows the calculation of some previously inaccessible entanglement measures. We explain the theory underlying the method, describe the algorithm, and introduce an importance-sampling procedure to improve the stochastic efficiency. To demonstrate the potential of our approach, the energy and staggered magnetization of the isotropic antiferromagnetic Heisenberg model on small lattices, the concurrence of one-dimensional spin rings, and the Renyi $S_2$ entanglement entropy of various sublattices of the $6 \times 6$ Heisenberg model are calculated. The nature of the sign problem in the method is also investigated.
description: 13 pages, 6 figures
BRST Theory for Continuous Spin
Creators: name: Bengtsson, Anders K. H.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Some puzzling aspects of higher spin field theory in Minkowski space-time, such as the tracelessness constraints and the search for an underlying physical principle, are discussed. A connecting idea might be provided by the recently much researched continuous spin representations of the Poincaré group. The Wigner equations, treated as first class constraints, yields to a four-constraint BRST formulation. The resulting field theory, generalizing free higher spin field theory, is one among a set of higher spin theories that can be related to previous work on unconstrained formulations. In particular, it is conjectured that the unconstrained higher spin theory of Francia and Sagnotti is a limit of a continuous spin theory. Furthermore, a simple analysis of the constraint structure reveals a hint of a physical rationale behind the trace constraints.
description: 19 pages, consistent with published version
title: Applications of petroleum geochemistry in reservoirs
title: Οι εφαρμογές της γεωχημείας στους ταμιευτήρες πετρελαίου
Creators: name: Slaveski Angelina
Publisher: name: Technical University of Crete
Year: 2019

description: This thesis is structured in two main parts-theoretical and practical part. The theoretical part will be mainly focused on the detailed description of the application of geochemistry in oil production and exploration, through explaining the role of geochemistry in the hydrocarbon asset management, in identifying new exploration or missed pay zones, in delineating reservoir compartmentalization by explaining the fingerprinting approach in assessing the reservoir continuity, etc. Additionally, it will be presented how the geochemistry aids in maximizing the waterflood efficiency, as well as its importance in the prediction of the flow assurance problems. In this part, the application of the reservoir geochemistry will be also discussed together with the application of the geochemistry studies in the maturity assessment, oil-oil, oil-source rock correlation. Furthermore, related to the application of the light hydrocarbons, which is the main focus in the practical part, will be discussed the postgenerative alteration processes and its characterization through the application of the light hydrocarbons. In the practical part, a set of light hydrocarbon ratios will be applied on 146 sample set of oils from Western Canada. Using the compositional data of these oil samples, the compositional changes in the samples caused by the postgenerative processes will be detaily observed.
description: Η παρούσα διπλωματική αποτελείται από δύο μέρη, θεωρητικό και πρακτικό. Το θεωρητικό μέρος επικεντρώνεται στη λεπτομερή περιγραφή της εφαρμογής της Γεωχημείας  πετρελαίου στην έρευνα και παραγωγή υδρογονανθράκων, εξηγώντας το ρόλο της Γεωχημείας στη διαχείριση  υδρογονανθράκων, στον εντοπισμό νέων περιοχών ή ζωνών ενδιαφέροντος σε ταμιευτήρες, στην οριοθέτηση και περιγραφή της εσωτερικής γεωμετρίας των ταμιευτήρων  και στη χρήση του χημικού αποτυπώματος για την αξιολόγηση της συνέχειας των ταμιευτήρων κ.τ.λ. Επιπρόσθετα θα παρουσιάσει τον τρόπο με τον οποίο η Γεωχημεία πετρελαίου χρησιμοποιείται στην μεγιστοποίηση της απόδοσης της διαδικασίας έγχυσης νερού, καθώς επίσης και τη σημασία της στην πρόβλεψη προβλημάτων ροής. Επιπλέον θα εξεταστεί η χρήση της γεωχημείας του ταμιευτήρα συνδυαστικά στις μελέτες ωριμότητας και τους συσχετισμούς πετρέλαιο-πετρέλαιο, πετρέλαιο-μητρικό πέτρωμα. Θα συζητηθεί η διαδικασία αλλαγής χημικής σύστασης που υφίσταται το πετρέλαιο μετά την παραγωγή του από το μητρικό πέτρωμα καθώς και ο χαρακτηρισμός του μέσω των εφαρμογών των ελαφρών υδρογονανθράκων.
Στο πρακτικό μέρος, ένα σύνολο αναλογιών συγκεντρώσεων ελαφριών υδρογονανθράκων θα χρησιμοποιηθεί σε 146 δείγματα πετρελαίων από τον δυτικό Καναδά. Χρησιμοποιώντας τα δεδομένα σύστασης των συγκεκριμένων πετρελαίων, θα εξεταστούν οι διεργασίες που επέδρασαν σε αυτά μετά την παραγωγή του από το μητρικό πέτρωμα.
A modified naturalness principle and its experimental tests
Creators: name: Farina, Marco
name: Pappadopulo, Duccio
name: Strumia, Alessandro
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Motivated by LHC results, we modify the usual criterion for naturalness by ignoring the uncomputable power divergences. The Standard Model satisfies the modified criterion ('finite naturalness') for the measured values of its parameters. Extensions of the SM motivated by observations (Dark Matter, neutrino masses, the strong CP problem, vacuum instability, inflation) satisfy finite naturalness in special ranges of their parameter spaces which often imply new particles below a few TeV. Finite naturalness bounds are weaker than usual naturalness bounds because any new particle with SM gauge interactions gives a finite contribution to the Higgs mass at two loop order.
description: 17 pages, 3 figures. v3: final version uploaded, references added, numerical error in the last column of table 1 fixed
Semiclassical dynamics of horizons in spherically symmetric collapse
Creators: name: Tavakoli, Yaser
name: Marto, Joao
name: Dapor, Andrea
Publisher: name: arXiv
Year: 2013
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In this work, we consider a semiclassical description of the spherically symmetric gravitational collapse with a massless scalar field. In particular, we employ an effective scenario provided by holonomy corrections from loop quantum gravity, to the homogeneous interior spacetime. The singularity that would arise at the final stage of the corresponding classical collapse, is resolved in this context and is replaced by a bounce. Our main purpose is to investigate the evolution of trapped surfaces during this semiclassical collapse. Within this setting, we obtain a threshold radius for the collapsing shells in order to have horizons formation. In addition, we study the final state of the collapse by employing a suitable matching at the boundary shell from which quantum gravity effects are carried to the exterior geometry.
description: Version accepted in IJMPD
title: Σχεδίαση τελεστικού ενισχυτή σε τάση τροφοδοσίας 1-V σε τεχνολογία 0.5 μm SiGe BiCMOS
Creators: name: Κωνσταντόπουλος Γεώργιος Κων
Publisher: name: Technical University of Crete
Year: 2005

description: Μη διαθέσιμο
Microscopic evidence for strong periodic lattice distortion in 2D charge-density wave systems
Creators: name: Dai, Jixia
name: Calleja, Eduardo
name: Alldredge, Jacob
name: Zhu, Xiangde
name: Li, Lijun
name: Lu, Wenjian
name: Sun, Yuping
name: Wolf, Thomas
name: Berger, Helmuth
name: McElroy, Kyle
Publisher: name: arXiv
Year: 2013
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: In the quasi-2D electron systems of the layered transition metal dichalcogenides (TMD) there is still a controversy about the nature of the transitions to charge-density wave (CDW) phases, i.e. whether they are described by a Peierls-type mechanism or by a lattice-driven model. By performing scanning tunneling microscopy (STM) experiments on the canonical TMD-CDW systems, we have imaged the electronic modulation and the lattice distortion separately in 2H-TaS$_2$, TaSe$_2$, and NbSe$_2$. Across the three materials, we found dominant lattice contributions instead of the electronic modulation expected from Peierls transitions, in contrast to the CDW states that show the hallmark of contrast inversion between filled and empty states. Our results imply that the periodic lattice distortion (PLD) plays a vital role in the formation of CDW phases in the TMDs and illustrate the importance of taking into account the more complicated lattice degree of freedom when studying correlated electron systems.
Figure S1. from Sex, mating and repeatability of Drosophila melanogaster longevity
Creators: name: Hoffman, Jessica M.
name: Dudeck, Sophie K.
name: Patterson, Heather K.
name: Austad, Steven N.
Publisher: name: The Royal Society
Year: 2021
Subjects: subject: Genetics
subject: FOS: Biological sciences
subject: Evolutionary Biology

description: Comparison of mated and virgin median longevities for the two replicate experiments.
title: Ανάπτυξη εφαρμογής τυπικού εγγράφου παρουσίασης μερών που βασίζεται στην τεχνολογία ΔΕΑ (OLE)
Creators: name: Λέζος Δημήτριος Βασ
Publisher: name: Technical University of Crete
Year: 1997

description: Μη διαθέσιμο
Opening Remarks: Copyrightability in the U.S. Copyright Office
Creators: name: Temple, Karyn A.
Publisher: name: Columbia University
Year: 2020
Subjects: subject: Law
subject: FOS: Law
subject: Copyright
subject: Copyright, Government employees'

description: The Copyright Office is really pleased to be cosponsoring this symposium with Columbia Law School on copyrightability. I am especially pleased to be able to do so because copyrightability is something that the Copyright Office knows just a little bit about, having registered and reviewed claims for copyright for nearly 150 years. The Copyright Office analyzes thousands of questions of copyrightability each day. Last year, we examined nearly 650,000 claims to copyright, and by the end of 2019, the Office will have registered more than 38 million claims since 1870. While impressive, these numbers refer only to the number of applications, not to the total universe of works that the Copyright Office has actually reviewed. Indeed, the number of works we have examined over the years soars into the many, many millions. Each time the Copyright Office examines a work, we determine whether it’s copyrightable, of course. These works span the full spectrum of musical works and sound recordings; visual works, including useful articles; and literary works, like books and computer programs. We make more copyrightability decisions than almost anywhere else in the world. For example, in just one week, we make more copyrightability decisions than are received in an entire year by all federal district courts combined.
Multivariate Survival Mixed Models for Genetic Analysis of Longevity Traits
Creators: name: Maia, Rafael Pimentel
name: Madsen, Per
name: Labouriau, Rodrigo
Publisher: name: arXiv
Year: 2013
Subjects: subject: Applications (stat.AP)
subject: FOS: Computer and information sciences

description: A class of multivariate mixed survival models for continuous and discrete time with a complex covariance structure is introduced in a context of quantitative genetic applications. The methods introduced can be used in many applications in quantitative genetics although the discussion presented concentrates on longevity studies. The framework presented allows to combine models based on continuous time with models based on discrete time in a joint analysis. The continuous time models are approximations of the frailty model in which the hazard function will be assumed to be piece-wise constant. The discrete time models used are multivariate variants of the discrete relative risk models. These models allow for regular parametric likelihood-based inference by exploring a coincidence of their likelihood functions and the likelihood functions of suitably defined multivariate generalized linear mixed models. The models include a dispersion parameter, which is essential for obtaining a decomposition of the variance of the trait of interest as a sum of parcels representing the additive genetic effects, environmental effects and unspecified sources of variability; as required in quantitative genetic applications. The methods presented are implemented in such a way that large and complex quantitative genetic data can be analyzed.
description: 36 pages, 2 figures, 3 tables
title: Σχεδιασμός και υλοποίηση γενικευμένης διάταξης ελέγχου με μικροελεγκτή και εφαρμογή σε έλεγχο βασισμένο στην ασαφή λογική
Creators: name: Ιωαννίδης Θόδωρος
Publisher: name: Technical University of Crete
Year: 1996

description: Μη διαθέσιμο
title: Υποστήριξη δεδομένων πολυμέσων σε έναν αντικειμενοστρεφή εξυπηρετητή πολυμέσων, συμβατό με το πρότυπο DAVIC
Creators: name: Ατζαράκης Γιάννης
name: Μελετίου Αριστείδης
Publisher: name: Technical University of Crete
Year: 1997

description: Μη διαθέσιμο
title: Χαρακτηρισμός βιογενούς ασβεστόλιθου περιοχής Αλφά Ρεθύμνου με επιτόπιες και εργαστηριακές μετρήσεις
Creators: name: Φέγγος Γεώργιος
name: Κουβελάς Μάριος
Publisher: name: Technical University of Crete
Year: 2006

description: Μη διαθέσιμο
Fast Computation of the Series Impedance of Power Cables with Inclusion of Skin and Proximity Effects
Creators: name: Patel, Utkarsh R.
name: Gustavsen, Bjorn
name: Triverio, Piero
Publisher: name: arXiv
Year: 2013
Subjects: subject: Computational Engineering, Finance, and Science (cs.CE)
subject: FOS: Computer and information sciences

description: We present an efficient numerical technique for calculating the series impedance matrix of systems with round conductors. The method is based on a surface admittance operator in combination with the method of moments and it accurately predicts both skin and proximity effects. Application to a three-phase armored cable with wire screens demonstrates a speed-up by a factor of about 100 compared to a finite elements computation. The inclusion of proximity effect in combination with the high efficiency makes the new method very attractive for cable modeling within EMTP-type simulation tools. Currently, these tools can only take skin effect into account.
description: Submitted for publication to IEEE Transactions on Power Delivery. Update: Published in IEEE Transactions on Power Delivery with the revised title of "An Equivalent Surface Current Approach for the Computation of the Series Impedance of Power Cables with Inclusion of Skin and Proximity Effects"
Non-symmetrizable quantum groups: defining ideals and specialization
Creators: name: Fang, Xin
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Algebra (math.QA)
subject: Rings and Algebras (math.RA)
subject: FOS: Mathematics

description: Two generating sets of the defining ideal of a Nichols algebra of diagonal type are proposed, which are then applied to study the bar involution and the specialization problem of quantum groups associated to non-symmetrizable generalized Cartan matrices.
description: 26 pages, to appear in PRIMS
title: Γεωφυσική έρευνα για τον εντοπισμό γεωθερμικού πεδίου στο Ακρωτήρι Χανίων
Creators: name: Βλασταράς Νικόλαος
Publisher: name: Technical University of Crete
Year: 2006

description: Μη διαθέσιμο
Finite-size corrections to Fermi's golden rule: I. Decay rates
Creators: name: Ishikawa, Kenzo
name: Tobita, Yutaka
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: A quantum mechanical wave of a finite size moves like a classical particle and shows a unique decay probability. Because the wave function evolves according to the Schrödinger equation, it preserves the total energy but not the kinetic energy in the intermediate-time region of a decay process where those of the parent and daughters overlap. The decay rate computed with Fermi's golden rule requires corrections that vary with the distance between the initial and final states, and the energy distribution of the daughter is distorted from that of plane waves. The corrections have universal properties in relativistically invariant systems and reveal macroscopic quantum phenomena for light particles. The implications for precision experiments in beta decays and various radiative transitions are presented.
description: 75 pages, 11 figures, 3 tables, published version in PTEP
Portrait of George III, King of Great Britain (1738-1820)
Creators: name: (:Unav)
Publisher: name: Columbia University
Year: 2019

description: This whole-length portrait depicts King George III standing, facing forward, his face seen in three-quarters looking to the left. He wears a Field-Marshal's uniform with a red coat and Star of the Garter, white breeches, black boots, and black bicorn hat. His right hand holds a cane and in his left hand he holds gloves. He stands in a landscape with Windsor Castle in the distance on the left side of the painting.
Universality of the Berezinskii-Kosterlitz-Thouless type of phase transition in the dipolar XY-model
Creators: name: Vasiliev, A. Yu.
name: Tarkhov, A. E.
name: Menshikov, L. I.
name: Fedichev, P. O.
name: Fischer, Uwe R.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We investigate the nature of the phase transition occurring in a planar XY-model spin system with dipole-dipole interactions. It is demonstrated that a Berezinskii-Kosterlitz-Thouless (BKT) type of phase transition always takes place at a finite temperature separating the ordered (ferro) and the disordered (para) phases. The low-temperature phase corresponds to an ordered state with thermal fluctuations, composed of a "gas" of bound vortex-antivortex pairs, which would, when considered isolated, be characterized by a constant vortex-antivortex attraction force which is due to the dipolar interaction term in the Hamiltonian. Using a topological charge model, we show that small bound pairs are easily polarized, and screen the vortex-antivortex interaction in sufficiently large pairs. Screening changes the linear attraction potential of vortices to a logarithmic one, and leads to the familiar pair dissociation mechanism of the BKT type phase transition. The topological charge model is confirmed by numerical simulations, in which we demonstrate that the transition temperature slightly increases when compared with the BKT result for short-range interactions.
description: 9 pages of RevTex4-1, 4 figures
Densities, submeasures and partitions of groups
Creators: name: Banakh, Taras
name: Protasov, Igor
name: Slobodianiuk, Sergiy
Publisher: name: arXiv
Year: 2013
Subjects: subject: Group Theory (math.GR)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 05E15, 05D10, 28C10

description: In 1995 in Kourovka notebook the second author asked the following problem: it is true that for each partition $G=A_1\cup\dots\cup A_n$ of a group $G$ there is a cell $A_i$ of the partition such that $G=FA_iA_i^{-1}$ for some set $F\subset G$ of cardinality $|F|\le n$? In this paper we survey several partial solutions of this problem, in particular those involving certain canonical invariant densities and submeasures on groups.
description: 14 pages (this is an update of the preceding version)
How International Oil Companies Could Assist the Republic of Cyprus to Achieve the Sustainable Development Goals: A Conversation Starter
Creators: name: Tornaritis, Andreas
name: Toledano, Perrine
Publisher: name: Columbia University
Year: 2018
Subjects: Gas industry--Environmental aspects
Petroleum industry and trade--Environmental aspects
Sustainable development

description: This policy paper is addressed to International Oil Companies (IOCs), public officials and Non-Governmental Organizations (NGOs) involved in the natural gas industry in Cyprus. There is currently no conversation happening in Cyprus on how the oil and gas industry could help Cyprus achieve their Sustainable Development Goals. Therefore, this paper hopes to initiate a debate and conversation around this topic. It provides an overview of the ways in which IOCs operating in Cyprus could contribute towards the sustainable development of the natural gas industry and assist the Republic of Cyprus to achieve a number of their 2030 Sustainable Development Goals (SDGs).
How International Oil Companies Could Assist Greece to Achieve the Sustainable Development Goals: A Conversation Starter
Creators: name: Sdoukou, Alexandra
name: Tornaritis, Andreas
name: Toledano, Perrine
Publisher: name: Columbia University
Year: 2019
Subjects: Gas industry--Environmental aspects
Petroleum industry and trade--Environmental aspects
Sustainable development

description: This policy paper wishes to be a timely contribution towards a fruitful debate among stakeholders; it urges International Oil Companies (IOCs) to examine how the critical Sustainable Development Goals (SDGs) for Greece can be integrated into their core business so that the oil and gas industry can contribute to the country’s sustainable growth.
title: Sequent Calculi for QBFs. Their Relation to Bounded Arithmetic, and the Complexity of the Witnessing Problem
Creators: name: Jomar, Dana
Publisher: name: TU Wien
Year: 2021
Subjects: subject: Mathematical Logic
subject: Complexity Theory
subject: Bounded Arithmetic
subject: QBF
subject: Sequent Calculi

description: G_i is Gentzen-like sequent calculi for proving QBFs, in which applications of the cut rule are restricted to QBFs form the ith level in the hierarchy of QBFs. The target formula of a quantifier rule in these calculi is restricted to quantifier-free formulas. The system G_i is closely related to theories of bounded arithmetic. A proof of a bounded formula can be translated to a G_i-proof of a QBF.For a proof system H we define the witnessing problem for a QBF from the kth level in the hierarchy to be the problem which takes as input an H-proof of a QBF form the kth level and an assignment to its free variables. The solution to the problem is a witness for the outermost existentially quantified variables.Stephen A. Cook and Tsuyoshi Morioka studied the complexity of the witnessing problem using the systems G_i. This thesis explores the complexity of the witnessing problem as studied by Cook and Morioka, brings together all of the different tools they used in their research, and presents it along with the results they proved to the reader.
Worldsheet one-loop energy correction to IIA Giant Magnon
Creators: name: Bai, Xiaojian
name: Lee, Bum-Hoon
name: Park, I. Y.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We compute one-loop corrections to the energy of a IIA giant magnon solution in the $AdS_4 \times CP^3$ background by using the standard quantum field theory (QFT) techniques. The string action is expanded around the solution to the quadratic order in the fluctuation fields. The resulting action has 2D coordinate dependent-coefficients, a feature that complicates the analysis. The solution contains a worldsheet velocity parameter $v$, and is expanded in terms of the parameter. A perturbative analysis is carried out by treating the $v$-dependent parts as vertices. The energy is computed by first putting the system in a box of length $L$ and Fourier-transforming the fields into the discrete momentum modes. We compare our result with the results obtained by the algebraic curve method.
description: 21 pages, no figures; v2: typos corrected, references added; v3: more discussion added, accepted by IJMPA
title: Φωτοκαταλυτική επεξεργασία αποβλήτων εκκοκκιστηρίου (παραγωγή βαμβακελαίου)
Creators: name: Φωτιάδης Χρήστος Δ.
Publisher: name: Technical University of Crete
Year: 2006

description: Μη διαθέσιμο
BTZ Black Hole Entropy in Loop Quantum Gravity and in Spin Foam Models
Creators: name: Garcia-Islas, J. Manuel
Publisher: name: arXiv
Year: 2013
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We present a comparison of the calculation of BTZ black hole entropy in loop quantum gravity and in spin foam models. We see that both give the same answer.
description: 10 pages, 3 figures, Final version, improved
Briefing for Civil Society Organizations – Understanding Commercial Eucalyptus Plantations: How Do They Work and What Are Their Environmental Impacts?
Creators: name: Columbia Center On Sustainable Investment
Publisher: name: Columbia University
Year: 2019
Subjects: Eucalyptus industry
Eucalyptus industry--Environmental aspects
Tree farms
Sustainable development

description: If a company wants to use a community’s land for eucalyptus plantations, the community should think carefully about whether this is a good idea. Civil society organizations that support communities can use this briefing to help communities understand the potential environmental impacts the community should be aware of. The briefing explains plantation forestry and the life-cycle of eucalyptus tree plantations. It also notes the different possible negative environmental impacts of eucalyptus plantations before exploring how this information can be factored into community decision-making about a proposed eucalyptus plantation. While the briefing focuses on eucalyptus plantations, a lot of it will also be relevant for other types of tree plantations.
title: Βέλτιστος σχεδιασμός διαχείρισης υπογείων υδάτων του Βόρειου Τμήματος της Νήσου Ρόδου με χρήση νευρωνικών δικτύων
Creators: name: Στεργιάδη Μαρία
Publisher: name: Technical University of Crete
Year: 2006

description: φ. 1: Εισαγωγή -- Κεφ. 2: Εισαγωγή στα νευρωνικά δίκτυα -- Κεφ. 3: Βασικές έννοιες για την κατανόηση των νευρωνικών δικτύων -- Κεφ. 4: Περιγραφή Perceptron και Adaline -- Κεφ. 5: Κανόνας πίσω διάδοσης -- Κεφ. 6: Προβλήματα σχεδιασμού και βελτίωση πολυεπίπεδων νευρωνικών δικτύων -- Κεφ. 7: Χρήση νευρωνικών δικτύων στην προσέγγιση φυσικών μοντέλων και στη βελτιστοποίηση περιβαλλοντικών προβλημάτων -- Κεφ. 8: Χρισιμοποιούμενο νευρωνικό δίκτυο -- Κεφ. 9: Εισαγωγή στους εξελικτικούς αλγόριθμους -- Κεφ. 10: Το πρόβλημα της βελτιστοποίησης -- Κεφ. 11: Αποτελέσματα βελτιστοποίησης
Ministerial bureaucracy and interest groups – New and forgotten perspectives on an old topic
Ministerialverwaltung und Interessengruppen – Neues und Vergessenes zu einem alten Thema
Creators: name: Döhler, Marian
Publisher: name: Cham : Springer Nature Switzerland AG
Year: 2020
Subjects: subject: Dewey Decimal Classification::300 | Sozialwissenschaften, Soziologie, Anthropologie::320 | Politik

description: German Federal Ministries play a central role in the initiation and formulation of political initiatives by the Federal Government. This repeatedly raises the question of interest group influence. In media reporting, but also scientific discussions, the answer is usually sought under the keyword “lobbyism”, in which the ministerial bureaucracy appears to be largely a passive recipient of external influence. This view is challenged by applying a three-dimensional analysis. The initial hypothesis is that the ministerial bureaucracy is capable of strategic interaction, which is first illustrated at the macro level of relations between the state and organized interests. Second, the effect of organization and procedures of the ministerial bureaucracy on the relationship with interest groups is examined. Finally, the attitudes of ministerial bureaucrats in dealing with organized interests are reconstructed by using data from an online survey. The result is that the interactions between the two sides go far beyond the one-way automatism suggested in the lobbying concept.
description: Die Bundesministerien nehmen bei der Initiierung und Formulierung politischer Vorhaben der Bundesregierung eine zentrale Rolle ein. Dies wirft immer wieder die Frage nach dem Einfluss organisierter Interessen auf. In der medialen Berichterstattung, aber auch in der wissenschaftlichen Diskussion wird die Antwort zumeist unter dem Stichwort „Lobbyismus“ gesucht. Die Ministerialverwaltung erscheint dabei überwiegend als passiver Adressat externer Einflussbestrebungen. Dieser Sichtweise soll mit Hilfe einer drei Dimensionen umfassenden Analyse entgegengetreten werden. Die Ausgangsthese lautet, dass die Ministerialverwaltung zu strategischer Interaktion befähigt ist, was zunächst auf der Makroebene der Beziehungen zwischen Staat und organisierten Interessen illustriert wird. Daran anschließend wird zweitens der Einfluss von Organisation und Arbeitsweise der Ministerialverwaltung auf die Beziehungen zu Verbänden untersucht. Die dritte Dimension schließlich gilt den Einstellungen der Ministerialverwaltung im Umgang mit organisierten Interessen. Im Ergebnis ist festzustellen, dass die Interaktionen zwischen beiden Seiten deutlich über die Automatismen der Interessendurchsetzung hinausgehen, wie sie im Lobbyismus-Konzept unterstellt werden.
title: Απολύμανση επεξεργασμένων αστικών λυμάτων με χρήση εξελιγμένων διεργασιών οξείδωσης και χλωρίωση με συνδυασμό και σύγκριση των μεθόδων
Creators: name: Μάρακας Χαρίδημος
Publisher: name: Technical University of Crete
Year: 2006

description:  Εισαγωγή -- 2. Απολύμανση υγρών αποβλήτων -- 3. Καινοτόμοι μέθοδοι απολύμανσης με χρήση προχωρημένων διεργασιών οξείδωσης
Don't Throw Caution to the Wind: In the green energy transition, not all critical minerals will be goldmines
Creators: name: Toledano, Perrine
name: Brauch, Martin Dietrich
name: Kennedy, Solina Rose Levine
name: Mann, Howard
Publisher: name: Columbia University
Year: 2020
Subjects: Clean energy industries
Clean energy investment
Mines and mineral resources
Sustainable development

description: The green energy transition will be exceedingly mineral intensive. Manufacturing solar panels, wind turbine and batteries to power cleaner energies is set to significantly increase the demand for co-called “critical” minerals. Such a forecast prompts high expectations in mineral-rich countries and suggests promising opportunities for developing countries. However, the projects to increase the primary extraction of critical minerals rest on bullish forecasts and uncertain terrain due to a number of factors explored in the paper that threaten to leave these investments obsolete and economically stranded. Governments, international actors, and mining advocates seeking to optimize the value of green energy mineral reserve should heed caution when pursuing and promoting the mining of critical minerals. We provide specific recommendations in the paper.
title: Ποιοτική ανίχνευση των οργανικών μικρορυπαντών στη βιομηχανική περιοχή του Ηρακλείου με τη μέθοδο SPME-GC-MS
Creators: name: Δαλαΐνα Σπυριδούλα
Publisher: name: Technical University of Crete
Year: 2006

description: Μη διαθέσιμο
Thorsten Krüger: Die Liebesverhältnisse der olympischen Götter mit sterblichen Frauen. Strukturanalyse und Interpretation
Creators: name: Chwalek, Burkhard
Publisher: name: Forum Classicum
Year: 2017

description: Rezension zu: Thorsten Krüger: Die Liebesverhältnisse der olympischen Götter mit sterblichen Frauen. Strukturanalyse und Interpretation. Hamburg (Lit Verlag) 2006 (zugl. Diss. Hamburg 2005), 135 S., (ISBN 3-8258-8708-1)
description: Forum Classicum, Nr. 2 (2007): Forum Classicum
A Global, Simultaneous Inversion for the Components of the Sea Level Budget, 2005-2015
Creators: name: Royston, Sam
name: Brady, Aoibheann
name: Chuter, Stephen J
name: Vishwakarma, Bramha D
name: Ziegler, Yann
name: Rougier, Jonty
name: Bamber, Jonathan L
Publisher: name: Zenodo
Year: 2021

description: eLightning presentation at AGU Fall Meeting 2021, online, 13-17 December 2021, New Orleans
Big Heegner point Kolyvagin system for a family of modular forms
Creators: name: Buyukboduk, Kazim
Publisher: name: arXiv
Year: 2013
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 11G05, 11G10, 11G40, 11R23, 14G10

description: The principal goal of this paper is to develop Kolyvagin's descent to apply with the big Heegner point Euler system constructed by Howard for the big Galois representation $\mathbb{T}$ attached to a Hida family $\mathbb{F}$ of elliptic modular forms. In order to achieve this, we interpolate and control the Tamagawa factors attached to each member of the family $\mathbb{F}$ at bad primes, which should be of independent interest. Using this, we then work out the Kolyvagin descent on the big Heegner point Euler system so as to obtain a big Kolyvagin system that interpolates the collection of Kolyvagin systems obtained by Fouquet for each member of the family individually. This construction has standard applications to Iwasawa theory, which we record at the end.
description: 24 pages. Many updates to previous version. Added Remark 3.2 explaining in detail how to deduce an exact sequence of the form (3.1) verifying (3.2)
Portrait of Samuel Bard (1742-1821)
Creators: name: (:Unav)
Publisher: name: Columbia University
Year: 2019

description: Samuel Bard (1742-1821), Honorary M.D., 1768; M.D., University of Edinburgh, 1765; LL.D., Princeton University, 1815. Various professorships, 1767-87; Dean Faculty of Medicine, 1792-1804; Trustee, 1787-1804; second President College of Physicians & Surgeons, 1811-21. Physician to George Washington.