cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Entanglement verification using local unitary stabilizers
Creators: name: Lyons, David W.
name: Walck, Scott N.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Local unitary stabilizer subgroups constitute powerful invariants for distinguishing various types of multipartite entanglement. In this paper, we show how stabilizers can be used as a basis for entanglement verification protocols on distributed quantum networks using minimal resources. As an example, we develop and analyze the performance of a protocol to verify membership in the space of Werner states, that is, multi-qubit states that are invariant under the action of any 1-qubit unitary applied to all the qubits.
description: 4 pages, version 2 with minor edits, close to final published version
Eck, Werner: Augustus und seine Zeit
Creators: name: Knobelsdorf, Solveig
Publisher: name: Forum Classicum
Year: 2017

description: Rezension zu: Eck, Werner: Augustus und seine Zeit. München: Beck 1998. 128 S. 14,80 DM (Becksche Reihe. 2084. Beck Wissen; ISBN 3-406-41488-8).
description: Forum Classicum, Nr. 4 (1998): Forum Classicum
On the role of initial and boundary conditions in numerical simulations of accretion flows
Creators: name: Bu, De-Fu
name: Yuan, Feng
name: Wu, Maochun
name: Cuadra, Jorge
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We study the effects of initial and boundary conditions, taking two-dimensional hydrodynamical numerical simulations of hot accretion flow as an example. The initial conditions considered include a rotating torus, a solution expanded from the one-dimensional global solution of hot accretion flows, injected gas with various angular momentum distributions, and the gas from a large-scale numerical simulation. Special attention is paid to the radial profiles of the mass accretion rate and density. Both can be described by a power-law function, $\dot{M}\propto r^s$ and $ρ\propto r^{-p}$. We find that if the angular momentum is not very low, the value of $s$ is not sensitive to the initial condition and lies within a narrow range, $0.47\la s \la 0.55$. However, the value of $p$ is more sensitive to the initial condition and lies in the range $0.48\la p \la 0.8$. The diversity of the density profile is because different initial conditions give different radial profiles of radial velocity due to the different angular momentum of the initial conditions. When the angular momentum of the accretion flow is very low, the inflow rate is constant with radius. Taking the torus model as an example, we have also investigated the effects of inner and outer boundary conditions by considering the widely adopted "outflow" boundary condition and the "mass flux conservation" condition. We find that the results are not sensitive to these two boundary conditions.
description: 10 pages, 15 figures, accepted by MNRAS
title: Workscrapers συγκρότημα γραφείων με συνεδριακό χώρο και εμπορικές χρήσεις στην περιοχή του νέου Φαλήρου - Πειραιά
Creators: name: Λυκος Γεωργιος
Publisher: name: Technical University of Crete
Year: 2018

description: Επέμβαση στην περιοχή του Νέου Φαλήρου Πειραιά με την κατασκευή συγκροτήματος πολυχώρων γραφείων, πλαισιωμένων από ένα συνεδριακό κέντρο και εμπορικούς χώρους.
title: Εργασιακά περιβάλλοντα και χρήστες: οι δυναμικές χωρικές σχέσεις εργαζόμενου-γραφείου και η εργασιακή εμπειρία

Creators: name: Λυκος Γεωργιος
Publisher: name: Technical University of Crete
Year: 2018

description: Η παρούσα ερευνητική εργασία μελετά την σχέση που αναπτύσσεται μεταξύ ενός εργαζομένου και ενός εργασιακού χώρου. Επικεντρώνεται στους αντιληπτικούς μηχανισμούς, στους χωρικούς παράγοντες και τα συστήματα με επιρροή στην αντίληψη του εργαζομένου και στις συμπεριφορές και δράσεις που ο τελευταίος αναπτύσσει εντός ενός χώρου γραφείου.
title: Η γέφυρα και ο οικισμός. Σχεδιασμός περιπτέρου επισκεπτών και διαμόρφωσης δημόσιων χώρων στην Αράδαινα

Creators: name: Καραμητρου Αντωνιος
Publisher: name: Technical University of Crete
Year: 2018

description:       Ως συνέχεια της ερευνητικής με τίτλο «Το κατώφλι της εγκατάλειψης: εγκώμιο του θανάτου των κτηρίων» επιλέχθηκε ως χώρο σχεδιαστικής άσκησης ο οικισμός της Αράδαινας. Ο οικισμός, εγκαταλελειμμένος τα τελευταία εβδομήντα χρόνια, συνιστά την τελευταία οικιστική μορφή, συνέχειας της αρχαϊκής πόλης Αραδήν ή Ηραδήν, η οποία καταλάμβανε ευρύτερη περιοχή σε σχέση με τη σημερινή εγκατάσταση. Η ζωή των κατοίκων ήταν πάντα συνδεδεμένη με το φαράγγι, όμως με την κατασκευή της γέφυρας, η σχέση αυτή διαρρηχθεί, παρά το γεγονός ότι η τελευταία  αποτελεί σημείο αναφοράς, τονίζοντας τη δυναμική του φυσικού υποβάθρου με την ανθρώπινη δραστηριότητα. Ο επισκέπτης αντικρύζοντας το μεγαλείο της φύσης, αισθανόμενος τον ίλιγγο από τη θέαση τον κατακόρυφων μετώπων του φαραγγιού σε συνδυασμό με τα έργα του ανθρώπου, βιώνει το δίπολο του μεταφυσικού φόβου και της διονυσιακής χαράς, κατακλυσμένος από το αίσθημα του Υψηλού.
      Η γέφυρα ως πράγμα περισυλλέγει το τετραμερές (γη, ουρανό, θεότητες, θνητούς), διαθέτοντας του θέση και γεννώντας τόπο στον οποίο παραχωρείται χώρος. Η γέφυρα, αιωρούμενη, υψώνεται πάνω από το φαράγγι, δεν συνδέει απλώς τις πλευρές του φαραγγιού που προϋπάρχουν, αλλά τις αφήνει να κείνται η μία έναντι και ταυτοχρόνως υπεράνω της άλλης. Η μία πλευρά διακρίνεται από την άλλη μέσω της γέφυρας και συλλέγουν τη γη, με τις εκτάσεις του τοπίου, που απλώνονται πίσω από αυτές, πλησίον της . Ο οικισμός έχοντας διάγει το κατώφλι της εγκατάλειψης, οδεύοντας προς την ολοκληρωτική του ενσωμάτωση στο γεωλογικό υπόβαθρό, εγείρει στον επισκέπτη σκέψεις περί της θνητής του φύσης, προκαλώντας του την εγρήγορση, την αυτογνωσία και την πληρότητα.
      Η παρούσα διπλωματική εργασία πραγματεύεται τους δύο δημόσιους χώρους, που βρίσκονται ένθεν και ένθεν της γέφυρας, την είσοδο στην Αράδαινα μέσω του μονοπατιου του φαραγγιού, καθώς και τις ελάχιστες δυνατές επεμβάσεις στο υφιστάμενο δίκτυο μονοπατιών. Επομένως, σκοπό έχει να αναδείξει όλες αυτές τις πτυχές του τόπου και να δημιουργήσει κατώφλια επίσκεψης - κατώφλια ανάδειξης της εγκατάλειψης στα προαναφερόμενα συστήματα.
Newtonian Semiclassical Gravity in the Ghirardi-Rimini-Weber Theory with Matter Density Ontology
Creators: name: Derakhshani, Maaneli
Publisher: name: arXiv
Year: 2013
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We propose a Newtonian semiclassical gravity theory based on the GRW collapse theory with matter density ontology (GRWm), which we term GRWmN. The theory is proposed because, as we show, the standard Newtonian semiclassical gravity theory based on the Schroedinger-Newton equations does not have a consistent Born rule probability interpretation for gravitationally self-interacting particles and implies gravitational cat states for macroscopic mass superpositions. By contrast, we show that GRWmN has a consistent statistical description of gravitationally self-interacting particles and adequately suppresses the cat states for macroscopic superpositions. Two possible routes to experimentally testing GRWmN are also considered. We conclude with a discussion of possible variants of GRWmN, what a general relativistic extension would involve, and various objections that might be raised against semiclassical gravity theories like GRWmN.
description: 23 pages, no figures. Significant revisions - expanded introduction section, new sections added, several new references added. Submitted to Phys. Lett. A
Methodology for general detection of plasma metabolites and drug/dietary components
Creators: name: Steppan, Claire
name: Muelas, Marina Wright
name: Kell, Douglas
name: Wiedmer, Tabea
name: Piotrowski, Mary
Publisher: name: Zenodo
Year: 2019

description: LC/GC-MS coupled to novel deconvolution routines for determining the approximately 3,000 molecules typically observable in serum
Global Network of Optical Magnetometers for Exotic (GNOME): Physics Novel scheme for exotic physics searches
Creators: name: Pustelny, S.
name: Kimball, D. F. Jackson
name: Pankow, C.
name: Ledbetter, M. P.
name: Wlodarczyk, P.
name: Wcislo, P.
name: Pospelov, M.
name: Smith, J.
name: Read, J.
name: Gawlik, W.
name: Budker, D.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: A novel experimental scheme enabling investigation of transient exotic spin couplings is discussed. The scheme is based on synchronous measurements of optical-magnetometer signals of several devices operating in magnetically shielded environments in distant locations ($\gtrsim100$ km). Although signatures of such exotic couplings may be present in the signal from a single magnetometer, it would be challenging to distinguish them from noise. By analyzing the correlation between signals from multiple, geographically separated magnetometers, it is not only possible to identify the exotic transient but also to investigate its nature. The ability of the network to probe presently unconstrained physics beyond the Standard Model is examined by considering the spin coupling to stable topological defects (e.g., domain walls) of axion-like fields. In the spirit of this research, a brief ($\sim 2$ hours) demonstration experiment involving two magnetometers located in Kraków and Berkeley ($\sim 9000$ km separation) is presented and discussion of the data-analysis approaches that may allow for the transient signal identification is provided. The prospects of the network are outlined in the last part of the paper.
description: Submitted to Annalen der Physik
Macroscopic quantum spin tunnelling with two interacting spins
Creators: name: Owerre, Solomon A.
name: Paranjape, M. B.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: High Energy Physics - Theory (hep-th)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We study the simple Hamiltonian, $H=-K(S_{1z}^2 +S_{2z}^2)+ λ\vec S_1\cdot\vec S_2$, of two, large, coupled spins which are taken equal, each of total spin $s$ with $λ$ the exchange coupling constant. The exact ground state of this simple Hamiltonian is not known for an antiferromagnetic coupling corresponding to the $λ>0$. In the absence of the exchange interaction, the ground state is four fold degenerate, corresponding to the states where the individual spins are in their highest weight or lowest weight states, $|\hskip-1 mm\uparrow, \uparrow\rangle, |\hskip-1 mm\downarrow, \downarrow\rangle, |\hskip-1 mm\uparrow, \downarrow\rangle, |\hskip-1 mm\downarrow, \uparrow\rangle$, in obvious notation. The first two remain exact eigenstates of the full Hamiltonian. However, we show the that the two states $ |\hskip-1 mm\uparrow, \downarrow\rangle, |\hskip-1 mm\downarrow, \uparrow\rangle$ organize themselves into the combinations $|\pm\rangle=\frac{1}{\sqrt 2} (|\hskip-1 mm\uparrow, \downarrow\rangle \pm |\hskip-1 mm\downarrow \uparrow\rangle)$, up to perturbative corrections. For the anti-ferromagnetic case, we show that the ground state is non-degenerate, and we find the interesting result that for integer spins the ground state is $|+\rangle$, and the first excited state is the anti-symmetric combination $|-\rangle$ while for half odd integer spin, these roles are exactly reversed. The energy splitting however, is proportional to $λ^{2s}$, as expected by perturbation theory to the $2s^{\rm th}$ order. We obtain these results through the spin coherent state path integral.
description: 5 pages, no figures
title: Ανάλυση απόδοσης με όρια εμπιστοσύνης για αλγόριθμους επιλογής γονιδίων
Creators: name: Μπαντή Μαρία-Αλίκη
Publisher: name: Technical University of Crete
Year: 2008

description: Μη διαθέσιμο
Inter-surface interaction via phonon in three-dimensional topological insulator
Creators: name: Habe, Tetsuro
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We theoretically study the phonon mediated intersurface electron-electron interactions on the pseudo two-dimensional metallic states at the two surfaces of a three-dimensional topological insulator. From a model of a three-dimensional topological insulator including the phonon excitation in it, we derive the effective Lagrangian which describes the two surface metallic states and the interaction between them. The intersurface electron-electron interactions can be either repulsive or attractive depending on parameters such as temperature, the speed of the phonon, and the Fermi velocity of the surface states. The attractive interaction removes the Dirac nodes from the two surface states as a result of the spontaneous symmetry breaking. On the basis of the calculated results, we also discuss how to tune the inter-surface interaction.
description: 8 pages, 6 figures
title: Παραλληλοποίηση αλγορίθμου Bayesian intrapersonal/extrapersonal classifier για εκτέλεση στον πολυεπεξεργαστή cell broadband engine
Creators: name: Πελεκάνος Νεκτάριος
Publisher: name: Technical University of Crete
Year: 2008

description: Μη διαθέσιμο
The Law and Science of Climate Change Attribution
Creators: name: Burger, Michael
name: Wentz, Jessica A.
name: Horton, Radley M.
Publisher: name: Columbia University
Year: 2020
Subjects: subject: Law
subject: FOS: Law
subject: Climatic changes
subject: Climatic changes--Government policy
subject: Science and state
subject: Liability (Law)
subject: Government liability

description: In recent years, there has been a marked increase in the number of lawsuits seeking to hold governments and private actors accountable for failure to take action on climate change. Climate change attribution science—which examines the causal links between human activities, global climate change, and the impacts of climate change—plays a central role in many of these lawsuits. Attribution science is rapidly evolving, both in regards to attributing impacts and extreme events to climate change and in attributing greenhouse gas emissions to particular actors—and so too is its role in the courtroom and in policymaking. Armed with a growing body of evidence linking increases in atmospheric greenhouse gas concentrations to specific harmful impacts, plaintiffs are pursuing more ambitious claims against governments and emitters for their contribution to, or failure to take action on, climate change. The Law and Science of Climate Change Attribution examines how attribution science is used in litigation and in policymaking, and how litigation and policymaking might influence current and future directions in attribution science. In so doing, the Article indicates where current research factors into various types of climate litigation, and where further work may be most impactful. After a brief Introduction, Part II defines and describes the state of attribution science, articulating core concepts and crafting a vocabulary for law-and-policy audiences to comprehend its methodologies and salience. Part III describes the role that attribution science has played in recent litigation as well as policy-making and planning activities, focusing primarily on examples from the United States but also drawing on international examples. Part IV discusses future directions in the law and science of climate change attribution, addressing questions such as how attribution science can better inform policy-making, planning, and litigation; how parties can best utilize attribution science in climate change litigation; and how courts can respond to the realities and limitations of climate attribution science.
title: Υλοποίηση αλγόριθμων αναγνώρισης προσώπου και γενετικής σε αναδιατασσόμενη λογική
Creators: name: Σωτηρόπουλος Ιωάννης
Publisher: name: Technical University of Crete
Year: 2008

description: Μη διαθέσιμο
AMS-02 positron excess: new bounds on dark matter models and hint for primary electron spectrum hardening
Creators: name: Feng, Lei
name: Yang, Rui-Zhi
name: He, Hao-Ning
name: Dong, Tie-Kuang
name: Fan, Yi-Zhong
name: Chang, Jin
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The data collected by ATIC, CREAM and PAMELA all display remarkable cosmic-ray-nuclei spectrum hardening above the magnetic rigidity $\sim$ 240 GV. One natural speculation is that the primary electron spectrum also gets hardened (possibly at $\sim 80$ GV) and the hardening partly accounts for the electron/positron total spectrum excess discovered by ATIC, HESS and Fermi-LAT. If it is the case, the increasing behavior of the subsequent positron-to-electron ratio will get flattened and the spectrum hardening should be taken into account in the joint fit of the electron/psoitron data otherwise the inferred parameters will be biased. Our joint fits to the latest AMS-02 positron fraction data together with the PAMELA/Fermi-LAT electron/positron spectrum data suggest that the primary electron spectrum hardening is needed in most though not all modelings. The bounds on dark matter models have also been investigated. In the presence of spectrum hardening of primary electrons, the amount of dark-matter-originated electron/positron pairs needed in the modeling is smaller. Even with such a modification, the annihilation channel $χχ\rightarrow μ^{+}μ^{-}$ has been tightly constrained by the Fermi-LAT Galactic diffuse emission data. The decay channel $χ\rightarrow μ^{+}μ^{-}$ is found to be viable.
description: 8 pages, including 3 figures and 2 tables
Regulating the Energy Transition: FERC and Cost-Benefit Analysis
Creators: name: Zevin, Avi
Publisher: name: Columbia University
Year: 2020
Subjects: Environmental law
Energy policy
Renewable energy sources--Government policy
Cost effectiveness

description: The energy system is in the midst of a transition. Technological advances and growing public concern about global climate change are leading to a substantial change in the production and use of energy resources, including from natural gas, wind turbines, solar photovoltaics, battery storage, and demand response. The success of this transition will depend on the considered deployment of energy infrastructure and reform of the rules that govern the operation of the electric system. One federal agency—the Federal Energy Regulatory Commission (FERC)—is responsible both for approving key energy infrastructure projects and for overseeing the operation of electric markets, and so will play a critical role in guiding the transformation of the energy system while maintaining its reliability and affordability. This Article argues that FERC’s management of this transition would be significantly enhanced if it embraced cost-benefit analysis—including accounting for important indirect costs and benefits, such as the effect on climate change—to guide its decision making. While many other federal agencies have adopted the use of cost-benefit analysis, FERC has been a significant laggard. This Article explains that changing course and cost-benefit analysis will allow FERC to manage the energy transition while maximizing social welfare, enhancing transparency and accountability, and mitigating legal and political risk. The Article does so by focusing on two of FERC’s most significant responsibilities—approval of electric market rules and of natural gas infrastructure certificates. For each, the Article evaluates FERC’s current approach to decision making, concludes that FERC has the statutory authority to use cost-benefit analysis, and identifies relevant costs and benefits that FERC can consider and the economic tools available to do so.
Focus point gauge mediation in product group unification
Creators: name: Brümmer, Felix
name: Ibe, Masahiro
name: Yanagida, Tsutomu T.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In certain models of gauge-mediated supersymmetry breaking with messenger fields in incomplete GUT multiplets, the radiative corrections to the Higgs potential cancel out during renormalization group running. This allows for relatively heavy superpartners and for a 125 GeV Higgs while the fine-tuning remains modest. In this paper, we show that such gauge mediation models with "focus point" behaviour can be naturally embedded into a model of SU(5) x U(3) product group unification.
description: 19 pages, 2 figures; v2: discussion extended, references added
Enabling national step changes in bioinformatics through ABLeS, the Australian BioCommons Leadership Share
Creators: name: Gustafsson, Ove Johan Ragnar
name: Al Bkhetan, Ziad
name: Francis, Rhys
name: Manos, Steven
Publisher: name: Zenodo
Year: 2023

description: ABLeS aims to provide Australian life science research communities with access to the tailored mix of infrastructure and computational resources that is necessary to respond to challenges in bioinformatics.
This document provides:

An introductory overview of ABLeS
Access schemes available for (1) Creation of reference data assets, (2) Production analysis and (3) Optimisation, testing and/or benchmarking of bioinformatics software
An overview of onboarding and support that are available within ABLeS
Acceptable use and expectations of ABLeS resources.
Evolution of primordial magnetic fields in mean-field approximation
Creators: name: Campanelli, Leonardo
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We study the evolution of phase-transition-generated cosmic magnetic fields coupled to the primeval cosmic plasma in turbulent and viscous free-streaming regimes. The evolution laws for the magnetic energy density and correlation length, both in helical and non-helical cases, are found by solving the autoinduction and Navier-Stokes equations in mean-field approximation. Analytical results are derived in Minkowski spacetime and then extended to the case of a Friedmann universe with zero spatial curvature, both in radiation and matter dominated eras. The three possible viscous free-streaming phases are characterized by a drag term in the Navier-Stokes equation which depends on the free-streaming properties of neutrinos, photons, or hydrogen atoms, respectively. In the case of non-helical magnetic fields, the magnetic intensity $B$ and the magnetic correlation length $ξ_B$ evolve asymptotically with the temperature $T$ as $B(T) \simeq κ_B (N_i v_i)^{\varrho_1} (T/T_i)^{\varrho_2}$ and $ξ_B(T) \simeq κ_ξ(N_i v_i)^{\varrho_3} (T/T_i)^{\varrho_4}$. Here, $T_i$, $N_i$, and $v_i$ are, respectively, the temperature, the number of magnetic domains per horizon length, and the bulk velocity at the onset of the particular regime. The coefficients $κ_B$, $κ_ξ$, $\varrho_1$, $\varrho_2$, $\varrho_3$, and $\varrho_4$, depend on the index of the assumed initial power-law magnetic spectrum, $p$, and on the particular regime, with the order-one constants $κ_B$ and $κ_ξ$ depending also on the cut-off adopted for the initial magnetic spectrum. In the helical case, the quasi-conservation of the magnetic helicity implies, apart from logarithmic corrections and a factor proportional to the initial fractional helicity, power-like evolution laws equal to those in the non-helical case, but with $p$ equal to zero.
description: 38 pages, 4 figures, 2 tables, references added, paraghraph added, minor changes, results unchanged, to appear in Eur. Phys. J. C
An Aye Aye for An Aye Aye: Making Biodiversity Offsets Sustainable
Creators: name: Takacs, David
Publisher: name: Columbia University
Year: 2020
Subjects: Biodiversity
Environmental law
Climate change mitigation
Environmental policy
Wildlife conservation

description: In biodiversity offsetting, developers are permitted to degrade an ecosystem and its species in exchange for “offsetting” the damage elsewhere. The practice, albeit controversial, is rapidly spreading as a proposed win-win solution that allows biodiversity and development to coexist. In this article, I explore best practices for how the U.S., Australia, the U.K., and South Africa structure their laws to turn species and their habitats into fungible commodities to be traded like Pokémon cards. I analyze how different jurisdictions regulate the temporal dimension of biodiversity offsetting: when must offset requirements be completed (e.g., before or after the original destruction is allowed), and for how long to must the offset be maintained? I examine the spatial requirements: e.g., how far from the original destruction must or may the offset be? I look at the type of trades that are allowed: for example, must the “replacement” entity be the same as the entity that is destroyed or degraded? Finally, I examine who must do what to make sure the offset is sustained. In analyzing how jurisdictions arrange these variables, I provide examples that others might or might not wish to adapt. Furthermore, how these variables are legally mandated helps us understand how a nation, a state, or a community understands its relationship with the natural world, and what that portends for the future of human/non-human interactions. How polities strike that balance will be reflected by the specific choices they make not only to allow offsetting in the first place, but in the ways they stack the variables to ensure (or not) species and ecosystem viability in the short term and long term. I conclude by explaining how well-structured, carefully implemented and monitored biodiversity offsetting could be part of our conservation toolkit for the Anthropocene era. But to implement biodiversity offsetting in a deeply equitable way will be expensive, difficult, and require a cadre of dedicated stakeholders committed to sustainable human and nonhuman communities.
Lorentz invariance without trans-Planckian physics?
Creators: name: Casadio, Roberto
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We explore the possibility that, in a quantum field theory with Planck scale cutoff Lambda=Mp, observable quantities for low-energy processes respect the Lorentz symmetry. In particular, we compute the one-loop radiative correction Pi to the self-energy of a scalar field with lambda phi^4 interaction, using a modified (non-invariant) propagator which vanishes in the trans-Planckian regime, as expected in the "classicalization" scenario. We then show that, by imposing the result does not depend on Lambda (in the limit Lambda to Mp), an explicit (albeit not unique) expression for Pi can be derived, which is similar to the one simply obtained with the standard Feynman propagator and a cutoff Lambda=Mp.
description: 9 pages, 1 figure, section about fluctuating cutoff added, final version to appear in PLB
title: Αποκατάσταση και μετατροπή της πρώην Ιερατικής Σχολής της Αγίας Τριάδας των Τζαγκαρόλων

Creators: name: Ανδρεου Αναστασια
Publisher: name: Technical University of Crete
Year: 2018

description: Η παρούσα εργασία αφορά την ιστορική τεκμηρίωση και τη μελέτη αποκατάστασης και μετατροπής του κτηρίου της Πρώην Ιερατικής Σχολής της Μονής Αγίας Τριάδος Τζαγκαρόλων που βρίσκεται στο ακρωτήριο Μελέχα Χανίων Κρήτης.
	Αρχικά έγινε ιστορική αναδρομή και ανάλυση των σημαντικότερων κτισμάτων της Μονής βάση βιβλιογραφικής έρευνας, έρευνας ιστορικού αρχείου και έρευνας πεδίου. Ο βασικός κορμός της εργασίας αφορά την ιστορική τεκμηρίωση, την αποτύπωση, την κατασκευαστική ανάλυση, την καταγραφή των φθορών και τις προτάσεις αποκατάστασης του κτηρίου της πρώην Ιερατικής Σχολής με σύγχρονες μεθόδους και υλικά που σέβονται το μνημείο και έχουν ως κύριο στόχο τη διάσωση του μνημείου.
	Στη συνέχεια προτείνεται νέα χρήση για το κτήριο, με ήπιες αρχιτεκτονικές παρεμβάσεις. Το κτήριο μετατρέπεται σε Συνεδριακό Κέντρο με στόχο την προβολή της Ορθοδοξίας και της πολιτιστικής ταυτότητας της Κρήτης, σεβόμενη το παιδευτικό ιδεώδες και το αυθεντικό
ήθος που ενσάρκωνε το Ιεροδιδασκαλείο. Στο τέλος της εργασίας επιχειρείται η διεξαγωγή συμπερασμάτων που προκύπτουν από την ανάλυση, αποκατάσταση και μετατροπή του κτηρίου.
title: Άγονες σιδηροδρομικές γραμμές ως στοιχεία σχεδιασμού στον σύγχρονο αστικό ιστό. Η ανάπλαση της σιδηροδρομικής γραμμής του Πλαταμώνα
Creators: name: Σφηκας Αλεξιος
Publisher: name: Technical University of Crete
Year: 2018

description: Η παλιά σιδηροδρομική γραμμή Λεπτοκαρυάς-Πλαταμώνα-Νέων Πόρων, κατασκευάστηκε το 1916, ανάμεσα στο επιβλητικό κάστρο του Πλαταμώνα, τις πλούσιες φυλλωσιές των πλατανιών και τα βότσαλα της ακτής. Αποτελεί ένα ιδιαίτερης ιστορικής αξίας τοπίο. Το 2004 ωστόσο εγκαταλείφθηκε και αντικαταστάθηκε από τη νέα σιδηροδρομική γραμμή Θεσσαλονίκης-Πειραιά. Όπως προκύπτει, πρόκειται για ένα σημείο που παρουσιάζει ιδιαίτερο ενδιαφέρον τόσο για την ιστορία του αλλά και για το φυσικό κάλλος που διαθέτει. Η σημερινή εικόνα ωστόσο δε θυμίζει σε τίποτα το παρελθόν του συγκεκριμένου τόπου. Η εγκατάλειψη τόσο της συνολικού μήκους 4,78χλμ σιδ. γραμμής, όσο και του σταθμού του Πλαταμώνα, αποτελεί σήμερα όριο. Η γραμμή που κάποτε προσέδωσε οικιστική ανάπτυξη και ζωντάνια στην περιοχή, παραμένει σήμερα άγονη.

Με βάση τα παραπάνω, η παρούσα διπλωματική εργασία επιχειρεί την μελέτη και την ενεργοποίηση της σιδηροδρομικής γραμμής και του σιδηροδρομικού σταθμού του Πλαταμώνα. Μέσω του σχεδιασμού, η σιδηροδρομική γραμμή  θα γίνει από όριο, η συρραφή για την ενοποίηση τμημάτων του οικισμού με σκοπό την αναζωογόνηση της ευρύτερης περιοχής. Σκοπός της εργασίας είναι η δημιουργία ενός γραμμικού αστικού πάρκου και ενός δικτύου, εντός και εκτός του οικισμού, που έχει ως κυρίαρχο άξονα την βασική διαδρομή που βρίσκεται επί της εγκαταλελειμμένης σιδηροδρομικής γραμμής. Το κάθε σημείο της γραμμής αντιμετωπίζεται ανάλογα με τον αστικό ιστό που το περιβάλει, ενώ η περιοχή του σιδηροδρομικού σταθμού επιλέγεται ως το κεντρικό σημείο της ανάπλασης.
Fuhrmann, Manfred: Seneca und Kaiser Nero
Creators: name: Richter-Reichhelm, Joachim
Publisher: name: Forum Classicum
Year: 2017

description: Rezension zu: Fuhrmann, Manfred: Seneca und Kaiser Nero. Berlin: Alexander Fest Verl. 1997. 374 S. 58,00 DM (ISBN 3-8286-0012-3; Lizenzausgabe Wissenschaftliche Buchgesellschaft 45,00 DM).
description: Forum Classicum, Nr. 4 (1998): Forum Classicum
title: Καινούργιο χωριό Ηρακλείου: ανάπλαση και κατοίκηση στο πλαίσιο του οινοτουρισμού
Creators: name: Πατσουμαδακης Εμμανουηλ
name: Κατσιμπρας Κωνσταντινος
Publisher: name: Technical University of Crete
Year: 2018

description: Το Καινούργιο Χωριό ανήκει στο δήμο Χερσονήσου του νομού Ηρακλείου. Έχει 109 κατοίκους και βρίσκεται νοτιοανατολικά του Ηρακλείου σε απόσταση 18.5 χιλιομέτρων. Σημαντικά μνημεία του χωριού είναι τα ενετικά πατητήρια οίνου και η οχυρωματική κατοικία- πύργος Φώσκολο. Σκοπός της παρούσας διπλωματικής εργασίας είναι η ανάπλαση και η επέκταση του χωριού. Πραγματοποιείται επαναπροσδιορισμός των ορίων και επανασχεδίαση του δημόσιου χώρου. Ακολουθεί η αποκατάσταση και η επανάχρηση του ενετικού πύργου και αρκετών παλαιών κατοικιών στο ιστορικό κέντρο. Έπεται η ανάδειξη της ιστορικότητας των ενετικών πατητηριών ως μνημείο. Με αφορμή ότι κύρια ασχολία των κατοίκων αποτελούσε ανέκαθεν η αμπελοκαλλιέργεια, επιδιώκεται η "ανοικοδόμηση" της τοπικής παραγωγής, δημιουργώντας μια τοπική μονάδα οινοπαραγωγής βασιζόμενη στην πλούσια σε αμπελώνες γη του χωριού. Τέλος, δημιουργούνται νέες κατοικίες κατάλληλες τόσο για μόνιμη διαμονή, όσο και για προσωρινή στα πλαίσια του οινοτουρισμού.
title: Οι οικοκοινότητες ως μοντέλο αυτόνομης και βιώσιμης ανάπτυξης
Creators: name: Γιακουβη Παναγιωτα
Publisher: name: Technical University of Crete
Year: 2018

description: Οι σύγχρονες συνθήκες διαβίωσης των ανθρώπων, διεθνώς αλλά και στη χώρα μας, κατά τα τελευταία χρόνια προκάλεσαν μια βαθιά και  πολυδιάστατη κρίση, η οποία οδήγησε στην ανάγκη για αναζήτηση εναλλακτικών προτύπων ζωής, με βασική προτεραιότητα την επανασύνδεση με το φυσικό περιβάλλον και με τους συνανθρώπους τους. Η αειφόρος ή βιώσιμη ανάπτυξη υπόσχεται να προσφέρει λύσεις στα πολύπλοκα προβλήματα και να αποκαταστήσει την ισορροπία μεταξύ των διαφορετικών οικοσυστημάτων. Το κίνημα των οικοκοινοτήτων, γεννήθηκε ως αντίδραση στις διεθνείς πολιτικές, οικονομικές και περιβαλλοντικές εξελίξεις. Εισηγείται ένα νέο μοντέλο ζωής και μια φιλοσοφία, που στηρίζεται στις αρχές της συνεργασίας, της αλληλεγγύης, της κοινοκτημοσύνης, του σεβασμού προς το περιβάλλον και τους φυσικούς πόρους. Αντικείμενο της παρούσας ερευνητικής εργασίας αποτελεί η διερεύνηση του βαθμού στον οποίο οι  ελληνικές οικοκοινότητες συμβάλλουν στην αντιμετώπιση του οικολογικού και κοινωνικο-οικονομικού προβλήματος. Για τον λόγο αυτό, επιλέχθηκαν 15 οικοκοινότητες/οικοχωριά από διαφορετικά σημεία (γεωγραφικά διαμερίσματα) της ελληνικής επικράτειας, σε μια προσπάθεια αναλογικής εκπροσώπησης όλων των περιοχών. Μέσω δειγματοληπτικής έρευνας, επιχειρήθηκε η μελέτη τους, προκειμένου να αναδειχθεί σε ποιους τομείς της βιώσιμης ανάπτυξης εστιάζουν κυρίως. Από τα αποτελέσματα της έρευνας προκύπτει ότι οι περιβαλλοντικές-οικονομικές-κοινωνικο- πολιτισμικές ευαισθησίες τους, εκφράζονται με διαφορετικό τρόπο και σε διαφορετικό βαθμό. Η ποικιλομορφία αυτή των εγχειρημάτων είναι δυνατόν να αποδοθεί τόσο στο διαφορετικό όραμα και στους στόχους που επιδιώκει να υλοποιήσει κάθε κοινότητα όσο και στα μέσα και τους διαθέσιμους πόρους. Επιπλέον, ο τόπος εγκατάστασής τους και η περιβαλλοντική, οικονομική και κοινωνικο-πολιτισμική ιδιαιτερότητα κάθε περιοχής προσδιορίζουν, σε σημαντικό βαθμό, το είδος και το εύρος των δράσεων τους.  Σε όλες, όμως, τις περιπτώσεις, το αποτέλεσμα των ανθρώπινων ενεργειών έχει μια κοινή συνισταμένη: την προστασία του περιβάλλοντος.
Hans-Joachim Gehrke / Helmuth Schneider (Hg.), Geschichte der Antike. Ein Studienbuch
Creators: name: Fechner, Detlef
Publisher: name: Forum Classicum
Year: 2017

description: Rezension zu: Hans-Joachim Gehrke / Helmuth Schneider (Hg.), Geschichte der Antike. Ein Studienbuch, Stuttgart/Weimar (Metzler) 2000, VII, 550 S. (ISBN 3-476-01455-X).
description: Forum Classicum, Nr. 4 (2001): Forum Classicum
Bogoliubov excitation spectrum of an elongated condensate from quasi-one-dimensional to three-dimensional transition
Creators: name: Yang, Tao
name: Henning, Andrew J.
name: Benedict, Keith A.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: The quasiparticle excitation spectra of a Bose gas trapped in a highly anisotropic trap is studied with respect to varying total number of particles by numerically solving the effective one-dimensional (1D) Gross-Pitaevskii (GP) equation proposed recently by Mateo \textit{et al.}. We obtain the static properties and Bogoliubov spectra of the system in the high energy domain. This method is computationally efficient and highly accurate for a condensate system undergoing a 1D to three-dimensional (3D) cigar-shaped transition, as is shown through a comparison our results with both those calculated by the 3D-GP equation and analytical results obtained in limiting cases. We identify the applicable parameter space for the effective 1D-GP equation and find that this equation fails to describe a system with large number of atoms. We also identify that the description of the transition from 1D Bose-Einstein condensate (BEC) to 3D cigar-shaped BEC using this equation is not smooth, which highlights the fact that for a finite value of $a_\perp/a_s$ the junction between the 1D and 3D crossover is not perfect.
description: 17 pages, 6 figures
Universality in the transport response of molecular wires physisorbed onto graphene electrodes
Creators: name: García-Suárez, V. M.
name: Ferradás, R.
name: Carrascal, D.
name: Ferrer, J.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We analyze the low-voltage transport response of large molecular wires bridging graphene electrodes, where the molecules are physisorbed onto the graphene sheets by planar anchor groups. In our study, the sheets are pulled away to vary the gap length and the relative atomic positions. The molecular wires are also translated in directions parallel and perpendicular to the sheets. We show that the energy position of the Breit-Wigner molecular resonances is universal for a given molecule, in the sense that it is independent of the details of the graphene edges, gaps lengths or of the molecule positions. We discuss the need to converge carefully the k-sampling to provide reasonable values of the conductance.
description: 6 pages, 6 figures
Forecasts for CMB μ- and i-type spectral distortion constraints on the primordial power spectrum on scales 8 < k < 10^4 Mpc^-1 with the future Pixie-like experiments
Creators: name: Khatri, Rishi
name: Sunyaev, Rashid A.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Silk damping at redshifts 1.5 x 10^4 < z < 2 x 10^6 erases CMB anisotropies on scales corresponding to the comoving wavenumbers 8 < k < 10^4 Mpc^-1 (10^5 < \ell < 10^8). This dissipated energy is gained by the CMB monopole, creating distortions from a blackbody in the CMB spectrum of the μ-type and the i-type. We study, using Fisher matrices, the constraints we can get from measurements of these spectral distortions on the primordial power spectrum from future experiments such as Pixie, and how these constraints change as we change the frequency resolution and the sensitivity of the experiment. We show that the additional information in the shape of the $i$-type distortions, in combination with the μ-type distortions, allows us to break the degeneracy between the amplitude and the spectral index of the power spectrum on these scales and leads to much tighter constraints. We quantify the information contained in both the μ-type distortions and the i-type distortions taking into account the partial degeneracy with the y-type distortions and the temperature of the blackbody part of the CMB. We also calculate the constraints possible on the primordial power spectrum when the spectral distortion information is combined with the CMB anisotropies measured by the WMAP, SPT, ACT and Planck experiments.
description: Includes free recipe. i-type distortion spectra and Mathematica code available at http://www.mpa-garching.mpg.de/~khatri/idistort.html
PS1-10jh: The Disruption of a Main-Sequence Star of Near-Solar Composition
Creators: name: Guillochon, James
name: Manukian, Haik
name: Ramirez-Ruiz, Enrico
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: When a star comes within a critical distance to a supermassive black hole (SMBH), immense tidal forces disrupt the star, resulting in a stream of debris that falls back onto the SMBH and powers a luminous flare. In this paper, we perform hydrodynamical simulations of the disruption of a main-sequence star by a SMBH to characterize the evolution of the debris stream after a tidal disruption. We demonstrate that this debris stream is confined by self-gravity in the two directions perpendicular to the original direction of the star's travel, and as a consequence has a negligible surface area and makes almost no contribution to either the continuum or line emission. We therefore propose that any observed emission lines are not the result of photoionization in this unbound debris, but are produced in the region above and below the forming elliptical accretion disk, analogous to the broad-line region (BLR) in steadily-accreting active galactic nuclei. As each line within a BLR is observationally linked to a particular location in the accretion disk, we suggest that the absence of a line indicates that the accretion disk does not yet extend to the distance required to produce that line. This model can be used to understand the spectral properties of the tidal disruption event (TDE) PS1-10jh, for which He II lines are observed, but the Balmer series and He I are not. Using a maximum likelihood analysis, we show that the disruption of a main-sequence star of near-solar composition can reproduce this event.
description: 21 pages, 11 figures, 1 table. Accepted to ApJ, revised version addresses referee's comments and includes 1 new figure
Legal Frameworks and Foreign Investment: A Primer on Governments' Obligations
Creators: name: Cordes, Kaitlin Y.
name: Johnson, Lise
name: Szoke-Burke, Sam
name: Maweni, Rumbidzai
Publisher: name: Columbia University
Year: 2019
Subjects: Managerial economics
Economics
Finance
Politics and government

description: Legal frameworks, and how they interact, are often invisible in the day to day. Yet they are powerful forces that influence government actions and that help to shape who benefits and who loses from foreign investment. Understanding these legal frameworks, and how they interact, is critical for anyone concerned with how foreign investment can be better harnessed to support, rather than weaken, sustainable development and human rights. This primer provides a brief overview of host government obligations under international investment law, international human rights law, domestic law, and relevant investor-state contracts. It also highlights some of the ways in which those legal obligations may affect or conflict with each other.
title: Μελέτη και εφαρμογή ισοσταθμιστών για σύρματες μεταδόσεις σε συστήματα με πολλές κεραίες στον πομπό και στο δέκτη (MIMO systems)
Creators: name: Καρδαράς Ιωάννης
Publisher: name: Technical University of Crete
Year: 2008

description: Μη διαθέσιμο
title: Σύστημα αποφώνησης και αναζήτησης ελληνικών δελτίων ειδήσεων
Creators: name: Μπακαρός Αλέξανδρος Μιχαήλ
Publisher: name: Technical University of Crete
Year: 2008

description: Μη διαθέσιμο
Quantum Corrections to Thermopower and Conductivity in Graphene
Creators: name: Hinz, Aleksander P.
name: Mucciolo, Eduardo R.
name: Kettemann, Stefan
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The quantum corrections to the conductivity and the thermopower in monolayer graphene are studied. We use the recursive Green's function method to calculate numerically the conductivity and the thermopower of graphene. We then analyze these weak localization corrections by fitting with the analytical theory as function of the impurity parameters and the gate potential. As a result of the quantum corrections to the thermopower, we find large magnetothermopower which is shown to provide a very sensitive measure of the size and strength of the impurities. We compare these analytical and numerical results with existing experimental measurements of magnetoconductance of single layer graphene and find that the average size and strength of the impurities in these samples can thereby be determined. We suggest favorable parameter ranges for future measurements of the magnetothermopower.
Why Did They Protest? Stability and Change in the Opt-Out Movement, 2016-2018
Creators: name: Pizmony-Levy, Oren
name: Green Saraisky, Nancy
Publisher: name: Columbia University
Year: 2020
Subjects: Social movements
Political activists
Educational tests and measurements--Public opinion
Education and state

description: One of the most prominent educational social movements in the United States during the past two decades has been the opt-out movement, in which parents and caregivers refuse to have their school-aged children sit for federally mandated tests. Although early responses by government officials framed the movement in terms of race, class, and gender, in truth we know little about the actual motivations that drive opt-out activists. In this study, we build on social movements theories to examine who participate in the opt-out movement, as well as whether these partici-pants or their motivations changed over time. By doing so, we seek to build upon the existing literature by synthesizing the two primary theoretical perspectives on social movements and ac-tivism – uniting the focus on the social psychological determinants of individual activism with the focus on the role of external factors. Our analysis is based on data from two waves of the Na-tional Survey on Opting Out (2016: n=1,611; 2018: n=1,298). Our analysis show both stability and change in the opt-out movement between 2016 and 2018. Although the data reveal certain sociodemographic changes in the composition of the movement, these changes in demographics do not fully account for shifts in activist motivations over time. We also find that much of the variation in motivation across key social categories (e.g., political ideology, teachers/non-teachers, and parents/non-parents) holds over time. In contrast to common perceptions of the opt-out movement, which often portray parental concerns over their child’s achievement as the pre-dominant motivation for participation, our study reveals that activists in the movement indicate they are motivated by political and ethical ideas. Participants in the opt-out movement are more concerned with collective problems, such as the well-being of teachers, broad curriculum, and privatization of public education, than with individual challenges. Given the massive changes that took place in the political and policy spheres during our period of study, the degree to which activist motivation stayed constant is notable – suggesting that many of these motivations are insulated from politics.
From Policy Networks to Policy Preferences: Organizational Networks in the Opt-Out Movement
Creators: name: Pizmony-Levy, Oren
name: Green Saraisky, Nancy
Publisher: name: Columbia University
Year: 2020
Subjects: Social movements
Political activists
Educational tests and measurements--Public opinion
Education and state

description: Organizational networks shape education policy by influencing power holders and elites, but do they have similar effects on grassroots activists? We use data from the National Survey on Opting Out (2016 and 2018; n = 2,909) to examine the role of organizational networks in mobilizing activists in the opt-out movement (a movement in which parents and caregivers refuse to have their children sit for standardized tests). Despite characterizations of the opt-out movement as a bunch of “soccer moms” disappointed with their children’s tests scores, our findings show that opt-out is in fact a structured movement reliant on social movement organizations (SMOs) with agendas that go beyond standardized tests. Further, we demonstrate a small but significant correlation between contact with SMOs and individual policy preferences. These patterns suggest that organizational networks may inform education policy by creating a social space for activists to learn about different policy ideas in education. We discuss implications for research and practice.