cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Ratios of $W$ and $Z$ cross sections at large boson $p_T$ as a constraint on PDFs and background to new physics
Creators: name: Malik, Sarah Alam
name: Watt, Graeme
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 motivate a measurement of various ratios of $W$ and $Z$ cross sections at the Large Hadron Collider (LHC) at large values of the boson transverse momentum ($p_T\gtrsim M_{W,Z}$). We study the dependence of predictions for these cross-section ratios on the multiplicity of associated jets, the boson $p_T$ and the LHC centre-of-mass energy. We present the flavour decomposition of the initial-state partons and an evaluation of the theoretical uncertainties. We show that the $W^+/W^-$ ratio is sensitive to the up-quark to down-quark ratio of parton distribution functions (PDFs), while other theoretical uncertainties are negligible, meaning that a precise measurement of the $W^+/W^-$ ratio at large boson $p_T$ values could constrain the PDFs at larger momentum fractions $x$ than the usual inclusive $W$ charge asymmetry. The $W^\pm/Z$ ratio is insensitive to PDFs and most other theoretical uncertainties, other than possibly electroweak corrections, and a precise measurement will therefore be useful in validating theoretical predictions needed in data-driven methods, such as using $W(\to\ellν)$+jets events to estimate the $Z(\toν\barν)$+jets background in searches for new physics at the LHC. The differential $W$ and $Z$ cross sections themselves, ${\rm d}σ/{\rm d}p_T$, have the potential to constrain the gluon distribution, provided that theoretical uncertainties from higher-order QCD and electroweak corrections are brought under control, such as by inclusion of anticipated next-to-next-to-leading order QCD corrections.
description: 33 pages, 13 figures. v2: expanded version published in JHEP
title: Σύστημα υποστήριξης αποφάσεων για την ενεργειακή διαχείριση κτιρίων
title: Decision support system for the energy management of buildings
Creators: name: Τζιωνης Γρηγοριος
Publisher: name: Technical University of Crete
Year: 2016

description: Στην σημερινή εποχή τα σπίτια αντιμετωπίζουν πολλά ενεργειακά προβλήματα οπότε σκοπός μας ήταν να φτιάξουμε ένα πληροφοριακό σύστημα το οποίο ανάλογα με τα δεδομένα που προκύπτουν με βάση τα χαρακτηριστικά του σπιτιού να προτείνονται κάποιες αποφάσεις για την βελτίωση της ενεργειακής απόδοσής τους.
title: Modeling and optimization of a hydroelectric power plant for a national grid power system supply. Case study: Stratos Hydroelectric Dam
title: Μοντελοποίηση και βελτιστοποίηση υδροηλεκτρικού σταθμού σε εθνικό δίκτυο παραγωγής ηλεκτρικής ενέργειας. Περίπτωση μελέτης: Φράγμα Στράτου
Creators: name: Μαργωνης Παναγιωτης-Γεωργιος
Publisher: name: Technical University of Crete
Year: 2017

description: Renewable Energy Sources (RES) are defined as energy sources, which are in abundance in the natural environment and are practically inexhaustible. More specific Hydroelectricity (HE) is an important component of world renewable energy supply and hydropower remains a major source of electricity generation due to its environmental friendly nature. In Greece the total installed capacity exceeds 3 GW. In this diploma thesis I am focusing in the Modeling and the Optimization of a Hydroelectric Power Plant. As numerical models I use the Kastraki HPP (320 MW) and Stratos I HPP (150 MW) because I had my internship in those two stations during the summer of 2015 and I had access to special parameters of the units after communication with the supervisor engineers of my internship. Modeling is the analysis of the non-linear models that can represent the basic components of a HPP (governor, turbine, servomotor). This thesis studies accurate and detailed hydro turbine and governor models, and the implementation of these models in Matlab/Simulink combined with the Simscape Power Systems (SPS). The way of their implementation and the construction of the two stations in Matlab/Simulink is explained analytically using basic function blocks or modifications of them. For the purpose of the Optimization I tried the heuristic Ziegler–Nichols tuning method in order to specify the coefficients of governor (PID-PI) under different percentages of electricity production of the unit. Also Matlab/Simuling gave me the opportunity to record and compare the figures of the two station with PID & PI controllers through simulation tests in the most common cases (three-phase fault, load demand change, change in the production level of each unit) with a view of studying the efficiency and the stability of these two generating stations.
Magnetization relaxation and geometric forces in a Bose ferromagnet
Creators: name: Armaitis, J.
name: Stoof, H. T. C.
name: Duine, R. A.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: We construct the hydrodynamic theory for spin 1/2 Bose gases at arbitrary temperatures. This theory describes the coupling between the magnetization, and the normal and superfluid components of the gas. In particular, our theory contains the geometric forces on the particles that arise from their spin's adiabatic following of the magnetization texture. The phenomenological parameters of the hydrodynamic theory are calculated in the Bogoliubov approximation and using the Boltzmann equation in the relaxation-time approximation. We consider the topological Hall effect due to the presence of a skyrmion, and show that this effect manifests itself in the collective modes of the system. The dissipative coupling between the magnetization and the normal component is shown to give rise to magnetization relaxation that is fourth order in spatial gradients of the magnetization direction.
description: Published version
Bifurcation, mode coupling and noise in a nonlinear multimode superconducting RF resonator
Creators: name: Tancredi, G.
name: Ithier, G.
name: Meeson, P. J.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Physics (quant-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: The addition of nonlinearity to an harmonic resonator provides a route to complex dynamical behaviour of resonant modes, including coupling between them. We present a superconducting device that makes use of the nonlinearity of Josephson junctions to introduce a controlled, tunable, nonlinear inductance to a thin film coplanar waveguide resonator. Considering the device as a potential quantum optical component in the microwave regime, we create a sensitive bifurcation amplifier and then demonstrate spectroscopy of other resonant modes via the intermode coupling. We find that the sensitivity of the device approaches within a factor two quantitative agreement with a quantum model by Dykman, but is limited by a noise that has its source(s) on-chip.
Phase transitions and gluodynamics in 2-colour matter at high density
Creators: name: Boz, Tamer
name: Cotter, Seamus
name: Fister, Leonard
name: Mehta, Dhagash
name: Skullerud, Jon-Ivar
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We investigate 2-colour QCD with 2 flavours of Wilson fermion at nonzero temperature T and quark chemical potential mu, with a pion mass of 700 MeV (m_pi/m_rho=0.8). From temperature scans at fixed mu we find that the critical temperature for the superfluid to normal transition depends only very weakly on mu above the onset chemical potential, while the deconfinement crossover temperature is clearly decreasing with mu. We find indications of a region of superfluid but deconfined matter at high mu and intermediate T. The static quark potential determined from the Wilson loop is found to exhibit a 'string tension' that increases at large mu in the 'deconfined' region. The electric (longitudinal) gluon propagator in Landau gauge becomes strongly screened with increasing temperature and chemical potential. The magnetic (transverse) gluon shows little sensitivity to temperature, and exhibits a mild enhancement at intermediate mu before becoming suppressed at large mu.
description: 11 pages, 22 eps figures, to be published in special issue of EPJA. v2: expanded introduction with additional references; improved analysis of Polyakov loop and static quark potential leading to some changes in results and conclusions; some changes to discussion and presentation. Accepted for publication
title: Ανάπλαση της «Παλιάς Στράτας» στην Αμοργό στο πλαίσιο της σύνδεσης των Κυκλάδων μέσω δικτύων χερσαίων και θαλάσσιων μονοπατιών
title: Reconstruction of the Old Route in Amorgos as part of the connection through the networks of land and sea trails of the Cyclades Islands

Creators: name: Αναστασιου Δημητριος
name: Κοκκαλη Ελενη
Publisher: name: Technical University of Crete
Year: 2018

description: Στη μικροκλίμακα του συμπλέγματος των Κυκλάδων, τα χερσαία μονοπάτια αποκαλύπτουν τα κρυμμένα σημεία του φυσικού και πολιτιστικού περιβάλλοντος και μαζί τα ίχνη του ανθρώπινου μόχθου να δαμάσει την άγονη γη, όπως με τις αναβαθμίδες, τις δεξαμενές και τα αλώνια. Η περιήγηση των μονοπατιών διαφυλάσσει και ταυτόχρονα προσφέρει απλόχερα στο υποκείμενο την τέχνη και τη σοφία του τόπου μέσω της ελευθερίας της περιπλάνησης. Από την άλλη πλευρά, η θάλασσα ως συνδετικό στοιχείο ενισχύει την αίσθηση του συνόλου μεταξύ των νησιωτικών πληθυσμών και τόπων. Η διττή επιρροή της θάλασσας οδηγεί τους νησιωτικούς τόπους τόσο στην εσωστρέφεια, που τους αναδεικνύει ως μονάδες, όσο και στην εξωστρέφεια, που τους αναδεικνύει ως σύνολα συνδεδεμένους με τα υδάτινα μονοπάτια. Η οργάνωση των δύο τύπων μονοπατιών σε ενιαία δίκτυα δημιουργεί τις διαδρομές οι οποίες αποτελούν τον κύριο άξονα ανάδειξης των φυσικών, πολιτιστικών και ιστορικών αξιών του κάθε νησιού. Στόχο μας αποτελεί η χάραξη και οργάνωση ενός σχεδίου διαδρομών και μιας τυπολογίας ήπιων υποδομών σε διακυκλαδική και τοπική κλίμακα, στο πλαίσιο δημιουργίας πλήρους δικτύου εναλλακτικού τουρισμού με ευαισθησία στην τοπικότητα και τη βιωματική εμπειρία με τον τόπο. Η Παλιά Στράτα της Αμοργού, πλούσια σε πολιτιστικά και γεωφυσικά στοιχεία, αποτελεί το πεδίο-πρότυπο για την ανάπτυξη αυτής της τυπολογίας.
Implications of Higgs boson search data on the two-Higgs doublet models with a softly broken $Z_2$ symmetry
Creators: name: Chiang, Cheng-Wei
name: Yagyu, Kei
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Based on current data of the Higgs boson search at the Large Hadron Collider, we constrain the parameter space of the two-Higgs doublet models where a softly broken $Z_2$ symmetry is employed to avoid flavor-changing neutral currents at tree level. There are four types of Yukawa interactions under the $Z_2$ charge assignments of the standard model fermions. We find that the model with type-II Yukawa interactions can better explain the experimental data among all. In this scenario, the couplings of the light CP-even Higgs boson $h$ with weak gauge bosons are almost standard model-like or only slightly different in a small range of $\tanβ$. In particular, we scrutinize a well-constrained region previously ignored by other analyses and study the phenomenology of the extra Higgs bosons at the Large Hadron Collider.
description: Text was slightly modified, and a reference was added
Confining Backgrounds and Quantum Chaos in Holography
Creators: name: Basu, Pallab
name: Ghosh, Archisman
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Classical world-sheet string theory has recently been shown to be nonintegrable and chaotic in various confining string theory backgrounds -- the AdS soliton background in particular. In this paper we study a minisuperspace quantization of the theory and look at properties of the spectrum like the distribution of level spacing, which are indicative of quantum order or chaos. In the quantum spectrum we find a gradual transition from chaotic (Wigner GOE) to integrable (Poisson) regime as we look at higher energies. This is expected since our system is integrable asymptotically, and at higher energies, the dynamics is entirely dominated by the kinetic terms.
description: 10 pages, 5 figures; v2: References added
title: Στρατηγικές διαχείρισης των βραχυχρόνιων μισθώσεων, το παράδειγμα των Χανίων
Creators: name: Ντουρα Μαγδαληνη
Publisher: name: Technical University of Crete
Year: 2018

description: Την τελευταία δεκαετία, στα αστικά κέντρα, παγκοσμίως, παρατηρείται μια νέα μορφή διαχείρισης της αστικής γης. Πρόκειται για το φαινόμενο της βραχυχρόνιας μίσθωσης ακινήτων, το οποίο εντάσσεται στα πλαίσια ενός ευρύτερου οικονομικού συστήματος, της οικονομίας διαμοιρασμού (sharing economy). Το νέο οικονομικό σύστημα μέσω της χρήσης της τεχνολογίας και του διαδικτύου, αλλάζει τα δεδομένα στις εμπορικές συναλλαγές. Η βραχυχρόνια μίσθωση έχει διαδοθεί ιδιαίτερα σε πόλεις με τουριστικό ενδιαφέρον, δίνοντας νέες ευκαιρίες τουριστικής εκμετάλλευσης του κτισμένου περιβάλλοντος και μεταβάλλοντας τον τουριστικό χάρτη της εκάστοτε πόλης.
Ωστόσο, η ταχύτητα εξάπλωσης του φαινομένου, σε συνδυασμό με το ανύπαρκτο θεσμικό πλαίσιο μέσα στο οποίο λειτουργεί, έχουν επιφέρει αρνητικές συνέπειες στην λειτουργία των πόλεων και στη συνύπαρξη του τουρισμού με τις υπόλοιπες αστικές χρήσεις. Ερευνητές του αστικού χώρου ισχυρίζονται ότι η διάδοση των βραχυχρόνιων μισθώσεων είναι μία από τις κύριες αιτίες για την εμφάνιση φαινομένων τουριστικού κορεσμού και εκδιωγμού των μόνιμων κατοίκων από δημοφιλείς τουριστικές περιοχές.
Στο παραπάνω πλαίσιο, ανάλογα φαινόμενα παρατηρούνται και στην πόλη των Χανίων. Τα τελευταία χρόνια, οι βραχυχρόνιες μισθώσεις έχουν εντείνει την τουριστική εκμετάλλευση του διαθέσιμου κτιριακού αποθέματος με αρνητικές συνέπειες στο ζήτημα της μόνιμης κατοικίας. Στόχος της συγκεκριμένης διπλωματικής εργασίας είναι να ερευνήσει το βαθμό διάδοσης της βραχυχρόνιας μίσθωσης ακινήτων στον οικιστικό ιστό των Χανίων, να καταγράψει τις επιπτώσεις της και να προτείνει συγκεκριμένη στρατηγική διαχείρισης αυτών των επιπτώσεων.
Color reconnection and flow-like patterns in pp collisions
Creators: name: Ortiz, Antonio
name: Christiansen, Peter
name: Cuautle, Eleazar
name: Maldonado, Ivonne
name: Paic, Guy
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Increasingly, with the data collected at the LHC we are confronted with the possible existence of flow in pp collisions. In this work we show that PYTHIA 8 produces flow-like effects in events with multiple hard subcollisions due to color string formations between final partons from independent hard scatterings, the so called color reconnection. We present studies of different identified hadron observables in pp collisions at 7 TeV with the tune 4C. Studies have been done both for minimum bias and multiplicity intervals in events with and without color reconnection to isolate the flow-like effect.
description: 4 pages, 4 figures. The first part of the manuscript was reorganized, some typos were corrected and references added. The final version should appear in PRL
Unimpeded Walking with Voice Guidance on Raspberry Pi Platform
Creators: name: Deligoz, Cenk Berkan
name: Seymen, Feride
name: Bayhan, Erdem
name: Namdar, Mustafa
name: Basgumus, Arif
Publisher: name: figshare
Year: 2022
Subjects: Deep learning

description: In this study, object and distance detection with Faster R-CNN and SSD MobileNetV2 architectures in Raspberry Pi platform, tracking tactile paving surfaces with the Hough’s theorem and voice transmission of the obtained object detection information to the visually impaired person with the Google Text-To-Speech (gTTS) library are studied. In the proposed approach, 8291 images were used while creating the data set of 11 different objects that visually impaired individuals may encounter. The training of two different deep learning architectures in a computer environment has been completed and transferred to the Raspberry Pi platform for object detection. Object detection at high FPS was performed using Google Coral USB Accelerator in the SSD MobileNetV2 model. While 95% accuracy rate was obtained in the Faster R-CNN model, 93% accuracy rate was obtained in the SSD MobileNetV2 model. Edge detection of tactile paving surfaces has been successfully performed using Hough's theorem at the appropriate angle and color tone. The distance between the visually impaired person and the object was measured and the names of the objects were transmitted to the visually impaired person audibly.
Dissipative Nonlinear Dynamics in Holography
Creators: name: Basu, Pallab
name: Ghosh, Archisman
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We look at the response of a nonlinearly coupled scalar field in an asymptotically AdS black brane geometry and find a behavior very similar to that of known dissipative nonlinear systems like the chaotic pendulum. Transition to chaos proceeds through a series of period-doubling bifurcations. The presence of dissipation, crucial to this behavior, arises naturally in a black hole background from the ingoing conditions imposed at the horizon. AdS/CFT translates our solution to a chaotic response of the operator dual to the scalar field. Our setup can also be used to study quenchlike behavior in strongly coupled nonlinear systems.
description: 12 pages, 7 figures; v2: References added, Changes complying to referee's suggestions made
U.S. Edible Fats and Oils Refining Capacities, 1975
Creators: name: Kromer, George W.
name: Gazelle, Stanley A.
name: Kromer, George W.
name: Gazelle, Stanley A.
Publisher: name: Unknown
Year: 1976
Subjects: subject: Crop Production/Industries
subject: Industrial Organization
subject: Productivity Analysis
subject: Edible fats and oils refineries
subject: refining capacity
subject: fats and oils production
subject: packing capacities

description: A special USDA survey of U.S. edible fats and oils refiners shows that the industry's maximum annual refining capacity at the end of 1975 totaled 17.0 billion pounds (7.7 million metric tons). Another 1.3 billion pounds of capacity was under construction and was scheduled for completion during 1976 and 1977, boosting potential refining capacity to 18.3 billion pounds (8.3 million metric tons). The industry's capacity has expanded about a third since 1967, the last special USDA survey. For the year ending September 1974, the industry operated at about 60 percent of capacity for refining and production of refinery products such as shortening, salad and cooking oils, and margarine oil. The industry's packing rate was about half of its estimated maximum capacity. In 1975 there were 49 companies operating 97 edible fats and oil refineries in the United States. All participated in the USDA survey.
description: Reprinted from The Fats and Oils Situation • FOS-281, February 1976
title: Παράμετροι διαμόρφωσης στρατηγικής για την ολοκληρωμένη διαχείριση των Ταμπακαριών Χανίων

title: Parameters of strategy for the integrated management of Tabakaria in Chania
Creators: name: Ανδρουλακη Μαρια
name: Βιδαλης Γεωργιος
name: Ιγγλεζακης Ιωαννης-Γεωργιος
Publisher: name: Technical University of Crete
Year: 2018

description: Τα Ταμπακαριά Χανίων είναι ένας χώρος που ενσωματώνει ένα σύνολο αξιών. Είναι ένας χώρος βιομηχανικής κληρονομιάς της πόλης, ο οποίος αποτελεί ένα από τα ελάχιστα σωζόμενα βυρσοδεψικά κέντρα στην Ελλάδα και χαρακτηρίζεται από ιδιαίτερη αρχιτεκτονική ταυτότητα. Ταυτόχρονα, είναι ένα υλικό αποτύπωμα της τέχνης και του επαγγέλματος της βυρσοδεψίας, μιας δραστηριότητας με μακραίωνη ιστορία και ισχυρή παρουσία στον ανθρώπινο πολιτισμό.
Σκοπός της συγκεκριμένης εργασίας, είναι να αποτελέσει την βάση για την δημιουργία στρατηγικής διαχείρισης του βιομηχανικού συνόλου των Ταμπακαριών.
Βασικοί στόχοι, είναι ο προσδιορισμός των παραμέτρων που είναι απαραίτητες για τη διαχείριση του, και η σκιαγράφηση των κατευθυντήριων πολιτικών που θα πρέπει να διαμορφωθούν στα πλαίσια ανάπτυξης μίας στρατηγικής.
Η εργασία αυτή αποτελείται από τρείς ενότητες κεφαλαίων και συνοδεύεται από οπτικοακουστικό υλικό συνεντεύξεων. Η πρώτη ενότητα συγκεντρώνει το σύνολο των ιστορικών στοιχείων και εστιάζει στην ιστορική έρευνα, ενώ η δεύτερη εστιάζει στην καταγραφή και την παρατήρηση του συνόλου των Ταμπακαριών Χανίων. Η τρίτη ενότητα της διπλωματικής ξεκινάει αποτυπώνοντας το θεωρητικό πλαίσιο που είναι απαραίτητο να ληφθεί υπόψιν και διατυπώνει σκέψεις και προθέσεις για τη σύνθεση ενός στρατηγικού σχεδιασμού που θα αφορά την διαχείριση και αξιοποίηση του πολιτιστικού αυτού πόρου. Οι συνεντεύξεις αφορούν τμήμα της κοινωνικής καταγραφής και λαμβάνονται υπόψη για την εξαγωγή συμπερασμάτων στο τελευταίο τμήμα της εργασίας.
Hybrid Monte Carlo/molecular dynamics simulation of a refractory metal high entropy alloy
Creators: name: Widom, Michael
name: Huhn, William Paul
name: Maiti, Soumyadipta
name: Steurer, Walter
Publisher: name: arXiv
Year: 2013
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The high entropy alloy containing refractory metals Mo-Nb-Ta-W has a body centered cubic structure, which is not surprising given the complete mutual solubility in BCC solid solutions of all pairs of the constituent elements. However, first principles total energy calculations for the binaries reveal a set of distinct energy minimizing structures implying the likelihood of chemically ordered low temperature phases. We apply a hybrid Monte Carlo and molecular dynamics method to evaluate the temperature-dependent chemical order. At 300K a cesium-chloride ordering emerges between mixed (Nb,Ta) sites and mixed (Mo,W) sites. This order is lost at elevated temperatures.
description: 5 pages, 3 figures, 1 table; version 2 has updated Table 1
title: Ιστορική εξέλιξη και μέθοδοι επεμβάσεων σε θολωτές και τοξωτές κατασκευές στους ναούς της Κρήτης
title: Historic development and intervention methods to vaulted and arched churches in the island of Crete, Greece
Creators: name: Πανηγυρακη Χρυση
Publisher: name: Technical University of Crete
Year: 2018

description: The initial scope of the present postgraduate thesis is to identify the various types of vaulted and arched churches in Crete, as well as to record their historical development. The first part of the thesis explores which are the various construction types, at which frequency they are encountered, as well as when and where they are to be found.
	Subsequently, the reinforcement techniques employed for arched and vaulted constructions, as well as the intervention methods used to restore their wear and damage are comprehensively studied. The core of this part comprises the following issues: which types of damages are encountered in Crete, at which frequency they are manifested and which of the restoration methods have been implemented to the churches of Crete.
	The present work, the objective of which was to concentrate and analyse all the aforementioned data, can constitute a useful aid to those interested in future studying and delving into these special constructions, i.e. arches, vaults, cupolas, in Cretan church architecture.

description: Αντικείμενο μελέτης της εν λόγω διπλωματικής μεταπτυχιακής εργασίας αποτελεί αρχικά ο εντοπισμός των διαφορετικών τύπων τοξωτών και θολωτών κατασκευών που απαντούν στους ναούς της Κρήτης, καθώς και η καταγραφή της ιστορικής τους εξέλιξης. Ποιοι τύποι εμφανίζονται, με ποια συχνότητα, ποια χρονική περίοδο και σε ποιες περιοχές, είναι μερικά από τα ζητήματα που εξετάζονται στην πρώτη ενότητα.
Στη συνέχεια, επιχειρείται ενδελεχής μελέτη των τεχνικών ενίσχυσης των τοξωτών και θολωτών κατασκευών αλλά και των επεμβατικών μεθόδων για την αποκατάσταση των φθορών και των αστοχιών που αυτές παρουσιάζουν. Ποια είδη αστοχιών απαντούν στην Κρήτη και με τι συχνότητα εκδηλώνονται και ποιες από τις μεθόδους αποκατάστασης εφαρμόζονται στους ναούς της, αποτελούν τα κύρια ζητήματα που συνθέτουν τον θεματικό πυρήνα της ενότητας αυτής.
Το εν λόγω πόνημα, σκοπός του οποίου ήταν η αποδελτίωση όλων αυτών των δεδομένων που προαναφέρθηκαν, θα αποτελέσει ένα χρήσιμο βοήθημα για όσους θελήσουν μελλοντικά να μελετήσουν και να ασχοληθούν με την παρουσία των ειδικών αυτών κατασκευών –τόξων, θόλων, τρούλων– στην κρητική ναοδομία, αφού παρέχει συγκεντρωμένες όλες τις απαραίτητες πληροφορίες.
title: Επιστροφή στον τόπο μέσω του σχεδιασμού διαδρομών στο τοπίο

title: Back to the roots through route planning in the landscape

Creators: name: Αναστασιου Δημητριος
name: Κοκκαλη Ελενη
Publisher: name: Technical University of Crete
Year: 2018

description: Η διερεύνηση της χωρικής και βιωματικής απόστασης του υποκειμένου από το φυσικό του περιβάλλον οδηγεί σε ερωτήματα τα οποία αφορούν στην ουσία της σχέσης πολιτισμού και φύσης: αν και σε ποια έκταση οι δύο έννοιες πλέον αλληλοεπηρεάζονται και αλληλεξαρτώνται, με άλλα λόγια για το βαθμό στον οποίο η φύση εμπνέει ακόμη τον ανθρώπινο νου και εκείνος μεριμνά για τη διατήρηση της ταυτότητας του φυσικού του περίγυρου. Η πολυπλοκότητα αυτής της σχέσης αντανακλάται στις έννοιες του τοπίου και του τόπου με τη βοήθεια των οποίων επιδιώκεται να απαντηθούν τα παραπάνω στο πεδίο της αρχιτεκτονικής. Η ανάλυση και ερμηνευτική προσέγγιση 5 σύγχρονων αρχιτεκτονικών επεμβάσεων με κοινό σχεδιαστικό άξονα την αναβάθμιση παλαιών και τη χάραξη νέων πεζοπορικών διαδρομών στο τοπίο, οδηγεί σε μια ακολουθία αρχιτεκτονικών ενεργειών, σε μια ενιαία «τυπολογία». Οι χαράξεις, τα υλικά, τα χρώματα και οι υποδομές διαμορφώνουν μια δυναμική η οποία προκαλεί τον «αναγνώστη» του τοπίου να ανιχνεύσει το ύφος και την ατμόσφαιρα του τόπου κινητ(ρ)οποιώντας τον έτσι να διαμείνει σε αυτόν. Επαναφέροντας τον άνθρωπο ως περιπατητή στο τοπίο, ο τόπος αμέσως αναζωογονείται, ενεργοποιείται. Παράλληλα, ο άνθρωπος νοηματοδοτώντας τον χώρο καθίσταται αναπόσπαστο μέρος του τόπου, γίνεται και ο ίδιος τόπος.
Symmetries of the Free Schrödinger Equation in the Non-Commutative Plane
Creators: name: Batlle, Carles
name: Gomis, Joaquim
name: Kamimura, Kiyoshi
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We study all the symmetries of the free Schrödinger equation in the non-commutative plane. These symmetry transformations form an infinite-dimensional Weyl algebra that appears naturally from a two-dimensional Heisenberg algebra generated by Galilean boosts and momenta. These infinite high symmetries could be useful for constructing non-relativistic interacting higher spin theories. A finite-dimensional subalgebra is given by the Schrödinger algebra which, besides the Galilei generators, contains also the dilatation and the expansion. We consider the quantization of the symmetry generators in both the reduced and extended phase spaces, and discuss the relation between both approaches.
Joint Beamforming and Power Control in Coordinated Multicell: Max-Min Duality, Effective Network and Large System Transition
Creators: name: Huang, Yichao
name: Tan, Chee Wei
name: Rao, Bhaskar D.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: This paper studies joint beamforming and power control in a coordinated multicell downlink system that serves multiple users per cell to maximize the minimum weighted signal-to-interference-plus-noise ratio. The optimal solution and distributed algorithm with geometrically fast convergence rate are derived by employing the nonlinear Perron-Frobenius theory and the multicell network duality. The iterative algorithm, though operating in a distributed manner, still requires instantaneous power update within the coordinated cluster through the backhaul. The backhaul information exchange and message passing may become prohibitive with increasing number of transmit antennas and increasing number of users. In order to derive asymptotically optimal solution, random matrix theory is leveraged to design a distributed algorithm that only requires statistical information. The advantage of our approach is that there is no instantaneous power update through backhaul. Moreover, by using nonlinear Perron-Frobenius theory and random matrix theory, an effective primal network and an effective dual network are proposed to characterize and interpret the asymptotic solution.
description: Some typos in the version publised in the IEEE Transactions on Wireless Communications are corrected
title: Η εξέλιξη των αρχών της αισθητικής αποκατάστασης στα έργα τέχνης, με πεδίο έρευνας τις τοιχογραφίες της Κνωσού και της Θήρας της Εποχής του Χαλκού
title: The evolution of the principles of αesthetic restoration in works of art, investigating the case studies of the Bronze Age frescoes of Knossos and Thera
Creators: name: Βουρου Ισαβελα
Publisher: name: Technical University of Crete
Year: 2018

description:        Η αισθητική αποκατάσταση μιας τοιχογραφίας διαγράφει μια πορεία με διαρκείς μεταβολές στον τρόπο προσέγγισης της, η οποία διαμορφώνεται βάση των εκάστοτε φιλοσοφικών ή ηθικών τοποθετήσεων ή των εκάστοτε αισθητικών θεωρήσεων των καλλιτεχνικών κινημάτων που ίσχυαν κάθε εποχή. Αρχικά η προσέγγιση είχε επεμβατικό χαρακτήρα, με απώτερο σκοπό την πλήρη αποκατάσταση της εικόνας, ενώ στην συνέχεια θέτονται με την καθοριστική παρουσία του Brandi, οι θεωρητικές, ηθικές και αισθητικές αρχές που συνθέτουν τους δεοντολογικούς κανόνες στην επιστήμη της συντήρησης. Έκτοτε η αισθητική αποκατάσταση αποσκοπεί στην ανάδειξη των σωζόμενων τμημάτων των τοιχογραφιών, ακολουθώντας συγκεκριμένη μεθοδολογία με διακριτικές τεχνικές που δεν επιβαρύνουν αισθητικά το έργο. Η νεώτερη τάση για την αποκατάσταση μιας τοιχογραφίας είναι με την χρήση της ψηφιακής τεχνολογίας, εξαλείφοντας ουσιαστικά την επέμβαση στο αυθεντικό σπάραγμα το οποίο διατηρεί σε μεγαλύτερο βαθμό τόσο την ακεραιότητα όσο και την αυθενικότητα του.
       Η εργασία πρωτοτυπεί στην θεματική της παράλληλης παρουσίασης των έργων αποκατάστασης τοιχογραφιών στην Ελλάδα και θα προσπαθήσει να λειτουργήσει ως οδηγός στις περαιτέρω επιλογές. Στην σύγχρονη συγκυρία της εφαρμογής εικονικής πραγματικότητας, μια τέτοια συζήτηση γύρω από τις αισθητικές θεωρήσεις και τις αναζητήσεις του αυθεντικού, θεωρείται αναγκαία και ζωτικού χαρακτήρα προκειμένου να συμβάλει στη νέα προοπτική.
Der Fall 'Rote Mitte' von Oskar Schlemmer: Besprechung des Urteil des Bundesgerichtshofes vom 24.10.2005 - II ZR 329/03
Creators: name: Jayme, Erik
Publisher: name: Kunstrechtsspiegel
Year: 2017

description: Kunstrechtsspiegel, Nr. 1 (2007): Kunstrechtsspiegel
Evolution Operator Can Always be Separated into the Product of Holonomy and Dynamic Operators
Creators: name: Yu, Xiao-Dong
name: Tong, D. M.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The geometric phase is a fundamental quantity characterizing the holonomic feature of quantum systems. It is well known that the evolution operator of a quantum system undergoing a cyclic evolution can be simply written as the product of holonomic and dynamical components for the three special cases concerning the Berry phase, adiabatic non-Abelian geometric phase, and nonadiabatic Abelian geometric phase. However, for the most general case concerning the nonadiabatic non-Abelian geometric phase, how to separate the evolution operator into holonomic and dynamical components is a long-standing open problem. In this work, we solve this open problem. We show that the evolution operator of a quantum system can always be separated into the product of holonomy and dynamic operators. Based on it, we further derive a matrix representation of this separation formula for cyclic evolution, and give a necessary and sufficient condition for a general evolution being purely holonomic. Our finding is not only of theoretical interest itself, but also of vital importance for the application of quantum holonomy. It unifies the representations of all four types of evolution concerning the adiabatic/nonadiabatic Abelian/non-Abelian geometric phase, and provides a general approach to realizing purely holonomic evolution.
description: 7 pages
Creation of a homogeneous plasma column by means of hohlraum radiation for ion-stopping measurements
Creators: name: Faik, Steffen
name: Tauschwitz, Anna
name: Basko, Mikhail M.
name: Maruhn, Joachim A.
name: Rosmej, Olga
name: Rienecker, Tim
name: Novikov, Vladimir G.
name: Grushin, Alexander S.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: In this work, we present the results of two-dimensional radiation-hydrodynamics simulations of a hohlraum target whose outgoing radiation is used to produce a homogeneously ionized carbon plasma for ion-beam stopping measurements. The cylindrical hohlraum with gold walls is heated by a frequency-doubled ($λ_l = 526.5$ $μm$) $1.4$ $ns$ long laser pulse with the total energy of $E_l = 180$ $J$. At the laser spot, the peak matter and radiation temperatures of, respectively, $T \approx 380$ $eV$ and $T_r \approx 120$ $eV$ are observed. X-rays from the hohlraum heat the attached carbon foam with a mean density of $ρ_C = 2$ $mg/cm^3$ to a temperature of $T \approx 25$ $eV$. The simulation shows that the carbon ionization degree ($Z \approx 3.75$) and its column density stay relatively stable (within variations of about $\pm7\%$) long enough to conduct the ion-stopping measurements. Also, it is found that a special attention should be paid to the shock wave, emerging from the X-ray heated copper support plate, which at later times may significantly distort the carbon column density traversed by the fast ions.
description: 12 pages, 12 figures
Buchbesprechung: Kultur und Wissenschaft: Berichte und Diskussionen auf der Tagung der Vereinigung der Deutschen Staatsrechtslehrer in Frankfurt am Main vom 05. bis 08. Oktober 2005
Creators: name: Froehlich, Annette
Publisher: name: Kunstrechtsspiegel
Year: 2017

description: Rezension zu: Kultur und Wissenschaft: Berichte und Diskussionen auf der Tagung der Vereinigung der Deutschen Staatsrechtslehrer in Frankfurt am Main vom 05. bis 08. Oktober 2005, de Gruyter, Berlin, 2006, 611 S. (Veröffentlichungen der Vereinigung der Deutschen Staatsrechtslehrer Bd. 65) - ISBN 3-89949-324-9, € 128.
description: Kunstrechtsspiegel, Nr. 1 (2008): Kunstrechtsspiegel
The Decade Ahead for U.S. Soybeans
Creators: name: Hacklander, Duane
name: Hacklander, Duane
Publisher: name: Unknown
Year: 1976
Subjects: subject: Crop Production/Industries
subject: Food Consumption/Nutrition/Food Safety
subject: International Relations/Trade
subject: Livestock Production/Industries
subject: Productivity Analysis
subject: Soybeans
subject: meal and oil projections

description: U.S. soybean production is projected to increase 20 percent from 1975 to 1,835 million bushels by 1985, despite increased competition from Brazilian soybeans and rising palm oil imports. Exports, especially in the form of beans, are projected to increase during the next decade. Domestic food fats and oils consumption is expected to increase with soybean oil maintaining its position of the total. During the next 10 years, demand for livestock and poultry products is expected to rise, boosting demand for soybean meal as a livestock and poultry feed.
description: Reprinted from The Fats and Oils Situation • FOS-281, February 1976
title: Scaling out streaming time series analytics on Storm
title: Κλιμάκωση αναλυτικής επεξεργασίας συνεχών χρονοσειρών χρησιμοποιώντας την πλατφόρμα Storm
Creators: name: Παυλακης Νικολαος
Publisher: name: Technical University of Crete
Year: 2017

description: Data can provide meaningful insights, if we are able to process it. We live in a time where
the rate with which data is being generated grows exponentially, and extracting useful
information from all this data, becomes harder and harder, thus mandating efficient and
scalable data analytics solutions. Oftentimes, the input data to analytics applications
is in the form of massive, continuous data streams. Consider the example of the global
stock markets: An interesting piece of information for traders, portfolio managers, and
so on, are the correlation/dependence patterns between different market players (e.g.,
equities, indexes, etc.); yet, such patterns typically change very rapidly over time, and
the information is only valuable if it becomes available in real time (e.g., for algorithmic
trading). This implies that stock market data needs to be processed in a streaming
fashion, typically focusing only on a sliding window of recent readings (e.g., “monitor
all correlations during the last hour”). In addition, data stream processing solutions need
to be scalable as there are thousands of market players, implying millions of possible
correlation/dependence pairs that need to be tracked in real time. This thesis introduces
efficient algorithms and architectures for tackling the problem of monitoring the pair-
wise dependence among thousands of data streams, and introduces a generic stream
processing framework, T-Storm, which can be used in order to easily and efficiently
develop, scale-out, and deploy large-scale stream analytics applications.
Warp and flare of the old Galactic disc as traced by the red clump stars
Creators: name: Uppal, Namita
name: Ganesh, Shashikiran
name: Schultheis, Mathias
Publisher: name: arXiv
Year: 2023
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Our study aims to investigate the outer disc structure of the Milky Way galaxy using the red clump (RC) stars. We analysed the distribution of the largest sample of RC stars to date, homogeneously covering the entire Galactic plane in the range of $40^\circ \le \ell \le 340^\circ$ and $-10^\circ \le b \le +10^\circ$. This sample allows us to model the RC star distribution in the Galactic disc to better constrain the properties of the flare and warp of the Galaxy. Our results show that the scale length of the old stellar disc weakly depends on azimuth, with an average value of $1.95 \pm0.26$ kpc. On the other hand, a significant disc flaring is detected, where the scale height of the disc increases from 0.38 kpc in the solar neighbourhood to $\sim 2.2$ kpc at R $\approx 15$ kpc. The flare exhibits a slight asymmetry, with $\sim 1$ kpc more scale height below the Galactic plane as compared to the Northern flare. We also confirm the warping of the outer disc, which can be modelled with $Z_w = (0.0057 \pm 0.0050)~ [R-(7358 \pm 368) (pc)]^{1.40 \pm 0.09} \sin(ϕ- (-2^\circ.03 \pm 0^\circ .18))$. Our analysis reveals a noticeable north-south asymmetry in the warp, with a greater amplitude observed in the southern direction compared to the northern. Comparing our findings with younger tracers from the literature, we observe an age dependency of both the flare and warp. An increase in flare strength with age suggests the secular evolution of the disc as the preferred mechanism for forming the flare. The increase of the maximum warp amplitude with age indicates that the warp dynamics could be the possible cause of the variation in the warp properties with age.
description: 11 pages, 12 figures, 4 tables Accepted for publication in MNRAS
Boundary Value Problems on a Half Sierpinski Gasket
Creators: name: Li, Weilin
name: Strichartz, Robert S.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: We study boundary value problems for the Laplacian on a domain $Ω$ consisting of the left half of the Sierpinski Gasket ($SG$), whose boundary is essentially a countable set of points $X$. For harmonic functions we give an explicit Poisson integral formula to recover the function from its boundary values, and characterize those that correspond to functions of finite energy. We give an explicit Dirichlet to Neumann map and show that it is invertible. We give an explicit description of the Dirichlet to Neumann spectra of the Laplacian with an exact count of the dimensions of eigenspaces. We compute the exact trace spaces on $X$ of the $L^2$ and $L^\infty$ domains of the Laplacian on $SG$. In terms of the these trace spaces, we characterize the functions in the $L^2$ and $L^\infty$ domains of the Laplacian on $Ω$ that extend to the corresponding domains on $SG$, and give an explicit linear extension operator in terms of piecewise biharmonic functions.
Electronic Thermal Conductivity Measurements in Intrinsic Graphene
Creators: name: Yiğen, S.
name: Tayari, V.
name: Island, J. O.
name: Porter, J. M.
name: Champagne, A. R.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The electronic thermal conductivity of graphene and 2D Dirac materials is of fundamental interest and can play an important role in the performance of nano-scale devices. We report the electronic thermal conductivity, $K_{e}$, in suspended graphene in the nearly intrinsic regime over a temperature range of 20 to 300 K. We present a method to extract $K_{e}$ using two-point DC electron transport at low bias voltages, where the electron and lattice temperatures are decoupled. We find $K_e$ ranging from 0.5 to 11 W/m.K over the studied temperature range. The data are consistent with a model in which heat is carried by quasiparticles with the same mean free-path and velocity as graphene's charge carriers.
description: Supplemental Online Material available at: http://physics.concordia.ca/faculty/alex/Yigen_Champagne_SM.pdf
Lifshitz Hydrodynamics
Creators: name: Hoyos, Carlos
name: Kim, Bom Soo
name: Oz, Yaron
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We construct the hydrodynamics of quantum critical points with Lifshitz scaling. There are new dissipative effects allowed by the lack of boost invariance. The formulation is applicable, in general, to any fluid with an explicit breaking of boost symmetry. We use a Drude model of a strange metal to study the physical effects of the new transport coefficient. It can be measured using electric fields with non-zero gradients, or via the heat production when an external force is turned on. Scaling arguments fix the resistivity to be linear in the temperature.
description: 11 pages, 1 figure, acceleration term corrected
Cost of Producing Soybeans in the U.S., 1974
Creators: name: Walter, Alan S.
name: Walter, Alan S.
Publisher: name: Unknown
Year: 1976
Subjects: subject: Crop Production/Industries
subject: Land Economics/Use
subject: Production Economics
subject: Research Methods/ Statistical Methods
subject: Soybeans
subject: costs
subject: cost of production

description: The cost of production for soybeans in 1974 was estimated through an enumerative survey. The average total cost, excluding land, was $69 per harvested acre of which $53 was for direct components. On a per bushel basis, total cost, excluding land, averaged $2.79 at the survey average yield of 24.7 bushels per acre, or 10 percent higher than the costs projected for a more 'normal' 1974 crop year. Land allocations were estimated by six alternative procedures with a range in the national average of $29 to $71 per acre or $1.18 to $2.90 per bushel. These costs varied substantially among subregions and among farms.
description: Reprinted from The Fats and Oils Situation • FOS-281, February 1976
Electromagnetic Response of Weyl Semimetals
Creators: name: Vazifeh, M. M.
name: Franz, M.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: It has been suggested recently, based on subtle field-theoretical considerations, that the electromagnetic response of Weyl semimetals and the closely related Weyl insulators can be characterized by an axion term E.B with space and time dependent axion angle. Here we construct a minimal lattice model of the Weyl medium and study its electromagnetic response by a combination of analytical and numerical techniques. We confirm the existence of the anomalous Hall effect expected on the basis of the field theory treatment. We find, contrary to the latter, that chiral magnetic effect (that is, ground-state charge current induced by the applied magnetic field) is absent in both the semimetal and the insulator phase. We elucidate the reasons for this discrepancy.
description: 4 pages + 4 figures. v2: version to appear in PRL (argument for vanishing equilibrium current elaborated, references updated)
Natural Higgs-flavor-democracy solution of the mu problem of supersymmetry and the QCD axion
Creators: name: Kim, Jihn E.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We show that the hierarchically small mu term in supersymmetric theories is a consequence of two identical pairs of Higgs doublets taking a democratic form for their mass matrix. We briefly discuss the discrete symmetry S2xS2 toward the democratic mass matrix. Then, we show that there results an approximate Peccei-Quinn symmetry and hence the value mu is related to the axion decay constant.
Strong gravity Lense-Thirring Precession in Kerr and Kerr-Taub-NUT spacetimes
Creators: name: Chakraborty, Chandrachur
name: Majumdar, Parthasarathi
Publisher: name: arXiv
Year: 2013
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: An exact expression derived in the literature for the rate of dragging of inertial frames (Lense-Thirring (LT) precession) in a general stationary spacetime, is reviewed. The exact LT precession frequencies for Kerr, Kerr-Taub-NUT and Taub-NUT spacetimes are explicitly derived. Remarkably, in the case of the zero angular momentum Taub-NUT spacetime, the frame-dragging effect is shown {\it not} to vanish, when considered for spinning test gyroscopes. The result becomes sharper for the case of vanishing ADM mass of that spacetime. We clarify how our results are consistent with claims in the recent literature of null orbital plane precession for NUT spacetimes.
description: 9 pages, 2 figures, version accepted for publication in Classical and Quantum Gravity
Hans Heiling : Romantische Oper in drei Akten nebst Vorspiel : Vollständiger Klavierauszug vom Componisten
Creators: name: Marschner, Heinrich
Publisher: name: Friedrich Hofmeister
Year: 1833

description: Zwei Arien und ein Duett, neu componirt für das K. K. Hof-Opern-Theater in Wien, Leipzig : Friedrich Hofmeister [Verlagsnummern:] 2980.81.82
description: Text: deutsch
description: op. 80