cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The DUNE-FEM-DG module.
Creators: name: Dedner, Andreas
name: Girke, Stefan
name: Klöfkorn, Robert
name: Malkmus, Tobias
Publisher: name: Archive of Numerical Software
Year: 2017
Subjects: Numerical Software, Dune, Discontinuous Galerkin Schemes, Hyperbolic problems, Elliptic problems, Parabolic problems, Euler, Navier-Stokes, Advection-Diffusion, Stokes, Poisson

description: In this paper we discuss the new publicly released Dune-Fem-DG module. This module provides highly ecient implementations of the Discontinuous Galerkin (DG) method for solving a wide range of non linear partial dierential equations (PDE). The interfaces used are highly flexible and customizable, providing for example mechanisms for using distributed parallelization, local grid adaptivity with dynamic load balancing, and check pointing. We discuss methods for solving stationary problems as well as a matrix-free implementation for time dependent problems. Both parabolic and first order hyperbolic PDE are discussed in detail including models for compressible and incompressible flows, i.e., the compressible Navier-Stokes equations.

For the spatial discretization a wide range of DG methods are implemented ranging from the standard interior penalty method to methods like LDG and CDG2. Upwinding numerical fluxes for first order terms are also available, including limiter bases stabilization for convection dominated PDEs. For the temporal discretization Runge-Kutta methods are used including higher order explicit, diagonally implicit and IMEX schemes. We discuss asynchronous communication, shared memory parallelization, and automated code generation which combined result in a high floating point performance of the code.
description: Archive of Numerical Software, Vol 5, No 1 (2017)
Dijet azimuthal decorrelation in $e^+e^-$ annihilation
Creators: name: Benslama, Hana
name: Delenda, Yazid
name: Khelifa-Kerfa, Kamel
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We examine non-global and clustering logarithms in the distribution of the azimuthal decorrelation between two jets in $e^+e^-\to$ dijet events, where the jets are defined with $E$-scheme recombination in the generalized $k_t$ algorithm. We calculate at one loop and to all orders the leading global single logarithms in the distribution of the said observable. We also compute at fixed order up to four loops at finite $N_c$ the non-global and clustering logarithms, and numerically resum them to all orders in the large-$N_c$ approximation. We compare our results at $\mathcal{O}(α_s)$ and $\mathcal{O}(α_s^2)$ with those of the EVENT2 fixed-order Monte Carlo program and find agreement of the leading singular behavior of the azimuthal decorrelation distribution. We find that the impact of non-global logarithms on the resummed distribution in the anti-$k_t$ algorithm is substantial, while it is significantly smaller in the $k_t$ algorithm. Furthermore, the combined clustering and non-global logarithms in the $k_t$ algorithm have an even smaller effect on the distribution. Finally, we use the program Gnole to calculate the resummed distribution at NLL accuracy, thus achieving state-of-the-art accuracy for the resummation of this quantity.
description: 14 pages, 8 figures, published version
Feeding versus no feeding during therapeutic hypothermia in asphyxiated neonates
Creators: name: Hussain, Syeda
name: Maharaj, Krishanta
name: Garcia, Gonzalo
name: Jasani, Bonny
Publisher: name: Open Science Framework
Year: 2022
Subjects: subject: Medical Sciences
subject: Medicine and Health Sciences

description: We aim to conduct a systematic review and meta-analysis of studies comparing the short-term outcomes of enteral nutrition versus no feeding during therapeutic hypothermia in asphyxiated neonates.
Echo Chambers and Affective Polarization
Creators: name: Jaidka, Kokil
name: Mukerjee, Subhayan
name: Lelkes, Yphtach
Publisher: name: Open Science Framework
Year: 2022
Subjects: subject: Communication
subject: Political Science
subject: FOS: Political science
subject: Social and Behavioral Sciences

description: In this study, we seek to understand the effect that online echo-chambers have on increasing affective polarization, by conducting a field experiment on Twitter.
In Search of the Edge: A Bayesian Exploration of the Detectability of Red Edges in Exoplanet Reflection Spectra
Creators: name: Barrientos, Jonathan Gomez
name: MacDonald, Ryan J.
name: Lewis, Nikole K.
name: Kaltenegger, Lisa
Publisher: name: arXiv
Year: 2023
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: Reflection spectroscopy holds great promise for characterizing the atmospheres and surfaces of potentially habitable terrestrial exoplanets. The surface of the modern Earth exhibits a sharp albedo change near 750 nm caused by vegetation - the red edge - which would leave a strong spectral signature if present on an exoplanet. However, the retrieval of wavelength-dependent surface properties from reflection spectra has seen relatively little study. Here, we propose a new surface albedo parameterization capable of retrieving the wavelength location of a priori unknown 'edge-like' features. We demonstrate that a wavelength-dependent surface albedo model achieves higher accuracy in retrieving atmospheric composition. Wavelength-dependent surfaces are also generally preferred over a uniform albedo model when retrieving simulated reflection spectra for a modern Earth analog, even for moderate signal-to-noise ratios (S/N = 10) and Earth-like clouds. Further, the location of the modern Earth's red edge can be robustly and precisely constrained (within 70 nm for S/N = 10). Our results suggest that future space-based direct imaging missions have the potential to infer surface compositions for rocky exoplanets, including spectral edges similar to those caused by life on the modern Earth.
description: 23 pages, 17 figures. Accepted for publication in ApJ
Phase-stabilised self-injection-locked microcomb
Creators: name: Wildi, Thibault
name: Ulanov, Alexander
name: Voumard, Thibault
name: Ruhnke, Bastian
name: Herr, Tobias
Publisher: name: Deutsches Elektronen-Synchrotron, DESY, Hamburg
Year: 2024

description: Microresonator frequency combs (microcombs) hold potential for precision metrology in a compact form factor impacting applications such as point-of-care diagnostics, environmental monitoring, time-keeping, navigation and astronomy. Through the principle of self-injection locking, electrically-driven chip-based microcombs with low complexity are now possible. However, phase-stabilisation of such self-injection-locked microcombs, a prerequisite for metrological frequency combs, has yet to be attained. Here, addressing this critical need, we demonstrate full phase-stabilisation of a self-injection-locked microcomb. The microresonator is implemented in a silicon nitride photonic chip, and by controlling a pump laser diode and a microheater with low voltage signals (sub 1.5 V), we achieve independent actuation of the comb's offset and line spacing frequencies. Both actuators reach a bandwidth of over 100 kHz and permit phase-locking of the microcomb to external frequency references. These results establish photonic chip-based, self-injection-locked microcombs as a low-complexity, yet versatile source for coherent precision metrology in emerging applications.
The effect of cultural distance and time on the authenticity levels of immigrants
Creators: name: Perez, Andrea
name: Fladerer, Martin
Publisher: name: Open Science Framework
Year: 2022
Subjects: subject: Multicultural Psychology
subject: Business
subject: Social and Behavioral Sciences
subject: Psychology
subject: FOS: Psychology

description: This research paper aims to study the impact that cultural distance and time have on the authenticity level of immigrants. The three central research questions are: (1) What is the relationship between time spent living in the immigrant's current country of residence and his or her authenticity level? (2) How is the authenticity level of immigrants influenced by the cultural distance between their country of origin and their current country of residence? (3) How does the cultural difference between country of origin and country of residence moderate the relationship between authenticity and time spent living in the current country of residence?
Multinucleation does not equal multinucleation: A differentiated consideration of the impact of binucleation in contrast to clusternucleation, micronucleation and polynucleation at the two cell stage on embryonic development
Creators: name: Westermann, Johanna
Publisher: name: Open Science Framework
Year: 2022
Subjects: subject: Medical Sciences
subject: Medicine and Health Sciences
subject: Reproductive and Urinary Physiology

description: In this study we aim to differentiate types of multinucleation at the cleavage stage of embryonic development. We will take a closer look into comparing binucleation with clusternucleation, micronucleation and polynucleation in terms of embryonic devolopment at later stages. For annotation of the nucleation status we will be using time lapse incubation.
A non-commutative Reidemeister-Turaev torsion of homology cylinders
Creators: name: Nozaki, Yuta
name: Sato, Masatoshi
name: Suzuki, Masaaki
Publisher: name: arXiv
Year: 2022
Subjects: subject: Geometric Topology (math.GT)
subject: Quantum Algebra (math.QA)
subject: FOS: Mathematics
subject: 57K16, 57Q10, 19B28 (Primary) 57K31, 57K20, 17B01 (Secondary)

description: We compute the Reidemeister-Turaev torsion of homology cylinders which takes values in the $K_1$-group of the $I$-adic completion of the group ring $\mathbb{Q}π_1Σ_{g,1}$, and prove that its reduction to $\widehat{\mathbb{Q}π_1Σ_{g,1}}/\hat{I}^{d+1}$ is a finite-type invariant of degree $d$. We also show that the $1$-loop part of the LMO homomorphism and the Enomoto-Satoh trace can be recovered from the leading term of our torsion.
description: 48 pages, 7 figures
title: Νέες τεχνολογίες στην εκπαίδευση
Creators: name: Καψαλάκη Σταυρούλα
Publisher: name: Technical University of Crete
Year: 2013

description: φ. 1: Ο ρόλος της εκπαίδευσης -- Κεφ. 2: Τεχνολογία και ΤΠΕ -- Κεφ. 3: Η πληροφορική στη σύγχρονη εκπαίδευση: μέσο διδασκαλίας ή αυτόνομο γνωστικό αντικείμενο; -- Κεφ. 4: Στάσεις και συμπεριφορές των εκπαιδευτικών σχετικά με τις ΤΠΕ -- Κεφ. 5: Κριτικές στάσεις στην εισαγωγή των ΤΠΕ στην εκπαιδευτική διαδικασία
David M. Jacobson, The Hellenistic Paintings of Marisa
Creators: name: Mielsch, Harald
Publisher: name: Bonner Jahrbücher
Year: 2017

description: Rezension zu: David M. Jacobson, The Hellenistic Paintings of Marisa. Including a facsimile reprint of: Painted Tombs in the necropolis of Marissa by John P. Peters and Hermann Thiersch (1905). The Palestine Exploration Fund Annual, Band 7. Maney Publishing, Leeds 2007. 140 Seiten, 64 Tafeln, zum Teil in Farbe
description: Bonner Jahrbücher, Bd. 209.2009(2011): Bonner Jahrbücher
title: Επίδραση της μεθόδου παρασκευής, σύστασης και δομής στη συμπεριφορά ηλεκτροθετικά ενισχυμένων καταλυτών Pt για αντιδράσεις de-NOx και οξείδωσης υδρογονανθράκων
Creators: name: Ματσούκα Βασιλική
Publisher: name: Technical University of Crete
Year: 2010

description: Μη διαθέσιμο
Impact of Gd doping on morphology and superconductivity of NbN sputtered thin films
Creators: name: Jha, Rajveer
name: Jyoti, Jeevan
name: Awana, V. P. S.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We report effect of Gd inclusion in the NbN superconductor thin films. The films are deposited on single crystalline Silicon (100) by DC reactive sputtering technique i.e., deposition of Nb and Gd in presence of reactive N2 gas. The fabricated relatively thick films (400 nm) are crystallized in cubic structure. These films are characterized for their morphology, elemental analysis and roughness by Scanning Electron Microscopy (SEM), Energy Dispersive X-ray spectroscopy (EDAX) and Atomic Force Microscopy (AFM) respectively. The optimized film (maximum Tc) is achieved with gas ratio of Ar:N2 (80:20) for both pristine and Gd doped films. The optimized NbN film possesses Tc (R=0) in zero and 140kOe fields are at 14.8K and 8.8K respectively. The Gd doped NbN film showed Tc (R=0) in zero and 130kOe fields at 11.2K and 6.8 K respectively. The upper critical field Hc2(0) of the studied superconducting films is calculated from the magneto-transport [R(T)H] measurements using GL equations. It is found that Gd doping deteriorated the superconducting performance of NbN.
description: 14 pages Text+Figs: comments/suggestions (awana@mail.nplindia.ernet.in)/www.freewebs.com/vpsawana/
Superradiant axion clouds around asteroid-mass primordial black holes
Creators: name: Branco, Nuno P.
name: Ferreira, Ricardo Z.
name: Rosa, João G.
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We analyze the dynamics and observational signatures of axion clouds formed via the superradiant instability around primordial black holes, focusing on the mass range $10^{14}-10^{18}$ kg where the latter may account for all the dark matter. We take into account the leading effects of axion self-interactions, showing that, even though these limit the number of axions produced within each cloud, a large number of superradiant axions become free of the black hole's gravitational potential and accumulate in the intergalactic medium or even in the host galaxy, depending on their escape velocity. This means that primordial black hole dark matter may lead to a sizeable astrophysical population of non-relativistic axions, with masses ranging from 0.1 eV to 1 MeV, depending on the primordial black hole mass and spin. We then show that if such axions couple to photons their contribution to the galactic and extragalactic background flux, mainly in the X-ray and gamma-ray band of the spectrum, is already beyond current observational limits for a large range of parameters that are, therefore, excluded. We finish by showing the prospects of the Athena X-ray telescope to further probe this co-existence of primordial black holes and axions.
description: 21 pages, 5 figures
title: Ανάλυση ανιόντων με φθορισμομετρία ακτίνων Χ
Creators: name: Χατζησταύρος Βασίλης
Publisher: name: Technical University of Crete
Year: 2010

description: φ. 1: Χημική ειδοταυτοποίηση -- Κεφ. 2: Τοξικότητα χημικών στοιχείων - επίδραση στον άνθρωπο - χρήσεις - πηγές - μέθοδοι αναλύσεις -- Κεφ. 3: Εκλεκτικές ανιοντικές μεμβράνες -- Κεφ. 4: Φασματοσκοπία φθορισμού ακτίνων Χ -- Κεφ. 5: Χημική ειδοταυτοποίηση χρωμικών ιόντων -- Κεφ. 6: Χημική ειδοταυτοποίηση βρώμικων ιόντων -- Κεφ. 7: Παρασκευή ανιοντικών μεμβράνων για ανίχνευση κατιόντων μετάλλων -- Κεφ. 8: Ποσοτικός και ποιοτικός προσδιορισμός αρσενικού, βαναδίου και σεληνίου με ανιοντικές εκλεκτικές μεμβράνες
Higher U(1)-gerbe connections in geometric prequantization
Creators: name: Fiorenza, Domenico
name: Rogers, Christopher L.
name: Schreiber, Urs
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mathematical Physics (math-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Algebraic Topology (math.AT)
subject: Quantum Algebra (math.QA)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 81T70, 53D50, 53D17, 55N30

description: We promote geometric prequantization to higher geometry (higher stacks), where a prequantization is given by a higher principal connection (a higher gerbe with connection). We show fairly generally how there is canonically a tower of higher gauge groupoids and Courant groupoids assigned to a higher prequantization, and establish the corresponding Atiyah sequence as an integrated Kostant-Souriau infinity-group extension of higher Hamiltonian symplectomorphisms by higher quantomorphisms. We also exhibit the infinity-group cocycle which classifies this extension and discuss how its restrictions along Hamiltonian infinity-actions yield higher Heisenberg cocycles. In the special case of higher differential geometry over smooth manifolds we find the L-infinity-algebra extension of Hamiltonian vector fields -- which is the higher Poisson bracket of local observables -- and show that it is equivalent to the construction proposed by the second author in n-plectic geometry. Finally we indicate a list of examples of applications of higher prequantization in the extended geometric quantization of local quantum field theories and specifically in string geometry.
description: Title changed. Exposition revised. 55 pages
title: Μελέτη προβλημάτων συγκέντρωσης τάσεων σε ιξωδοπλαστικά υλικά υπό την επίδραση θερμομηχανικών φορτίων
Creators: name: Κουρτάκης Στέλιος
Publisher: name: Technical University of Crete
Year: 2004

description: 1. Εισαγωγή -- 2. Ιξωδοπλαστικότητα -- 3. Ιξωδοπλαστικά μοντέλα -- 4. Μέθοδος συνοριακών στοιχείων -- 5. Μη γραμμικά συνοριακά στοιχεία -- 6. Μηχανική βλαβών -- 7. Πυκνότητα παραμορφωσιακής ενέργειας
Methods of funding health care services in the primary care sector: a scoping review with an Australian focus.
Creators: name: Swierkowski, Piotr
name: Graham, Wayne
name: Innes, Peter
Publisher: name: Open Science Framework
Year: 2022
Subjects: subject: Business
subject: Medicine and Health Sciences
subject: Social and Behavioral Sciences
subject: cost drivers
subject: costing
subject: funding
subject: funding models
subject: health care services
subject: primary health care
subject: primary health care service

description: Funding arrangements may influence quality of health care outcomes and may affect teamwork dynamics among health care personnel. A scoping review is to be undertaken to further investigate this in the context of primary care, with the following specific questions / objectives to be investigated: · What are the funding models in use currently and how do they relate to each other? · What other funding models have been proposed / contemplated in the past 25 years and what are advantages and disadvantages of each? · What is known about the relationship between funding and primary care cost drivers?
Wer ist wer? Das deutsche Who’s who. Begr. v. Walter Habel
Creators: name: Werner, Jürgen
Publisher: name: Forum Classicum
Year: 2017

description: Rezension zu: Wer ist wer? Das deutsche Who’s who. Begr. v. Walter Habel. XLI 2002/03 Bundesrepublik Deutschland. Lübeck 2002, Schmidt/Römhild. XVI, 1680 S. (ISBN 3-7950-2024-4).
description: Forum Classicum, Nr. 1 (2003): Forum Classicum
Dark matter in the Inert Doublet Model after the discovery of a Higgs-like boson at the LHC
Creators: name: Goudelis, A.
name: Herrmann, B.
name: Stål, O.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We examine the Inert Doublet Model in light of the discovery of a Higgs-like boson with a mass of roughly 126 GeV at the LHC. We evaluate one-loop corrections to the scalar masses and perform a numerical solution of the one-loop renormalization group equations. Demanding vacuum stability, perturbativity, and S-matrix unitarity, we compute the scale up to which the model can be extrapolated. From this we derive constraints on the model parameters in the presence of a 126 GeV Higgs boson. We perform an improved calculation of the dark matter relic density with the Higgs mass fixed to the measured value, taking into account the effects of three- and four-body final states resulting from off-shell production of gauge bosons in dark matter annihilation. Issues related to direct detection of dark matter are discussed, in particular the role of hadronic uncertainties. The predictions for the interesting decay mode h ->γγ are presented for scenarios which fulfill all model constraints, and we discuss how a potential enhancement of this rate from the charged inert scalar is related to the properties of dark matter in this model. We also apply LHC limits on Higgs boson decays to invisible final states, which provide additional constraints on the mass of the dark matter candidate. Finally, we propose three benchmark points that capture different aspects of the relevant phenomenology.
description: 31 pages, 11 figures. Minor corrections and bibliography update. Matches version published in JHEP
Spatio-temporal characterization of Cassiopeia A
Creators: name: Ichinohe, Yuto
name: Sato, Toshiki
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: Analyzing the X-ray data of supernova remnants (SNRs) are among the most challenging task in the current X-ray astronomy because SNRs are both spatially extended and variable over time. We developed the strategy to track the time-series properties of all the parts constituting a diffuse structure by introducing the free-form image registration technique based on B-spline, and demonstrated the methodology using the Chandra data of Cassiopeia A. We successfully extracted the spatial distribution map of the time variability of continuum luminosity. To our knowledge, this is the first comprehensive characterization of such a dynamic diffuse target both in spatial and temporal viewpoints. We found that each of the four clusters derived by applying k-means algorithm to the extracted light curves has a clear physical meaning distinct from other clusters, which shows that our method is not a mere technique for automation but capable of capturing the underlying physics.
description: 13 pages, 6 figures, Accepted for publication in ApJ. The movie corresponding to Fig.3 (which demonstrates the result better) is available at http://s.rikkyo.ac.jp/IchinoheSato2023
Ab initio calculation of carrier mobility in semiconductors including ionized-impurity scattering
Creators: name: Leveillee, Joshua
name: Zhang, Xiao
name: Kioupakis, Emmanouil
name: Giustino, Feliciano
Publisher: name: arXiv
Year: 2023
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: The past decade has seen the emergence of ab initio computational methods for calculating phonon-limited carrier mobilities in semiconductors with predictive accuracy. More realistic calculations ought to take into account additional scattering mechanisms such as, for example, impurity and grain-boundary scattering. In this work, we investigate the effect of ionized-impurity scattering on the carrier mobility. We model the impurity potential by a collection of randomly distributed Coulomb scattering centers, and we include this relaxation channel into the ab initio Boltzmann transport equation, as implemented in the EPW code. We demonstrate this methodology by considering silicon, silicon carbide, and gallium phosphide, for which detailed experimental data are available. Our calculations agree reasonably well with experiments over a broad range of temperatures and impurity concentrations. For each compound investigated here, we compare the relative importance of electron-phonon scattering and ionized-impurity scattering, and we critically assess the reliability of Matthiessen's rule. We also show that an accurate description of dielectric screening and carrier effective masses cam improve quantitative agreement with experiments.
Non-asymptotic detection of two-component mixtures with unknown means
Creators: name: Laurent, Béatrice
name: Marteau, Clément
name: Maugis-Rabusseau, Cathy
Publisher: name: arXiv
Year: 2013
Subjects: subject: Statistics Theory (math.ST)
subject: FOS: Mathematics

description: This work is concerned with the detection of a mixture distribution from a $\mathbb{R}$-valued sample. Given a sample $X_1,\dots,X_n$ and an even density $ϕ$, our aim is to detect whether the sample distribution is $ϕ(\cdot-μ)$ for some unknown mean $μ$, or is defined as a two-component mixture based on translations of $ϕ$. We propose a procedure which is based on several spacings of the order statistics, which provides a level-$α$ test for all $n$. Our test is therefore a multiple testing procedure and we prove from a theoretical and practical point of view that it automatically adapts to the proportion of the mixture and to the difference of the means of the two components of the mixture under the alternative. From a theoretical point of view, we prove the optimality of the power of our procedure in various situations. A simulation study shows the good performances of our test compared with several classical procedures.
description: Published at http://dx.doi.org/10.3150/14-BEJ657 in the Bernoulli (http://isi.cbs.nl/bernoulli/) by the International Statistical Institute/Bernoulli Society (http://isi.cbs.nl/BS/bshome.htm)
title: Διαδοχικές προσεγγίσεις και παράλληλοι υπολογισμοί δικτύου/πλέγματος για την καινοτόμο επίλυση ελλειπτικών μερικών διαφορικών εξισώσεων
Creators: name: Σηφαλάκης Αναστάσης Γ.
Publisher: name: Technical University of Crete
Year: 2007

description: Μη διαθέσιμο
Bericht zur Lage des altsprachlichen Unterrichts in der Bundesrepublik Deutschland (vorgelegt auf der Vertreterversammlung in Fulda am 8. 3. 2003). Berichtsjahr: 2001/2002
Creators: name: Scheda, Gunther
name: Schmitz, Dietmar
Publisher: name: Forum Classicum
Year: 2017

description: -
description: Forum Classicum, Nr. 2 (2003): Forum Classicum
title: Εντοπισμός και επιδιόρθωση βλάβης σε δομικά στοιχεία με τη χρήση "ευφυών υλικών"
Creators: name: Βουτετάκη Μαρία-Στυλιανή
Publisher: name: Technical University of Crete
Year: 2009

description:  Εισαγωγή -- 2. Έλεγχος δομικής ακεραιότητας -- 3. Πιεζοηλεκτρικό φαινόμενο και μέθοδος ΕΜΑ -- 4. Προσομοίωση ευφυούς δομικού συστήματος -- 5. Διάγνωση βλαβών σε δομικά στοιχεία με τη χρήση πιεζοηλεκτρικών υλικών -- 6. Επιδιόρθωση βλαβών σε δομικά στοιχεία με τη χρήση πιεζοηλεκτρικών υλικών
Climate information for adaptation: from years to decades
Creators: name: Nissan, Hannah J.
name: Thomson, Madeleine C.
name: Mason, Simon J.
name: Muñoz, Ángel G.
Publisher: name: Columbia University
Year: 2018
Subjects: Climatic changes
Climatic changes--Forecasting
Long-range weather forecasting
Public health
Public health--Decision making

description: In writing this book, we have prioritized shorter timescales of weather and climate variability because these have most direct relevance to the types of operational and planning decisions made in the health sector. However, in this chapter, we focus on longer-term health decisions that require climate knowledge and information at timescales beyond a year to multiple decades (up to 50 years). This time span incorporates both natural decadal variability and the influences of anthropogenic climate change. It is an extremely challenging timeframe at which to work because of the very limited operational predictive skill at multiannual timescales, and limited confidence about how rainfall may change on longer timescales. Despite these challenges, the timescales under consideration, especially the next five to 20 years, are particularly important when considering how to adapt to climate change. Here we discuss what we do and do not know about the climate in the coming years. We then focus on the practical use of climate information in understanding observed climate impacts on health as well as the prediction of multi-annual to multi-decadal risks. The multi-annual timescale is often referred to as ‘decadal’, even though the forecasts are for periods less than a decade.
title: Η γεωμετρία των συνόλων αστάθειας ρητών μιγαδικών συναρτήσεων
Creators: name: Πιτσιλαδής Ηλίας Γ.
Publisher: name: Technical University of Crete
Year: 2009

description: 1.Βασικές έννοιες από την μιγαδική δυναμική -- 2.Η θεωρία των μοναδιαίων τόμων -- 3.Η γεωμετρία της έλξης -- 4.Βελτιστοποίηση επί πολυωνυμικών τόμων -- 5.Μοναδιαίες τομές και ευστάθεια -- 6.Υποβιβασιμότητα πολυωνύμων -- 7.Πολυωνυμικά νέφη & εφαρμογές
Study 7: Modeling social actions in relationships as recursive inference
Creators: name: Hung, Michelle
name: Thomas, Ashley
name: Radkani, Setayesh
name: Tenenbaum, Joshua
name: Saxe, Rebecca
Publisher: name: Open Science Framework
Year: 2022
Subjects: subject: Social and Behavioral Sciences

description: In this project, we explore the idea that people view food sharing actions as “bids” to reveal the type and closeness of a relationship. We use a modified Rational Speech Act framework to model the recursive inferences that food sharing interactions allow.
A Bayesian Neural Network Approach for Tropospheric Temperature Retrievals from a Lidar Instrument
Creators: name: Farhani, Ghazal
name: Martucci, Giovanni
name: Roberts, Tyler
name: Haefele, Alexander
name: Sica, Robert J.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Atmospheric and Oceanic Physics (physics.ao-ph)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: FOS: Physical sciences

description: We have constructed a Bayesian neural network able of retrieving tropospheric temperature profiles from rotational Raman-scatter measurements of nitrogen and oxygen and applied it to measurements taken by the RAman Lidar for Meteorological Observations (RALMO) in Payerne, Switzerland. We give a detailed description of using a Bayesian method to retrieve temperature profiles including estimates of the uncertainty due to the network weights and the statistical uncertainty of the measurements. We trained our model using lidar measurements under different atmospheric conditions, and we tested our model using measurements not used for training the network. The computed temperature profiles extend over the altitude range of 0.7 km to 6 km. The mean bias estimate of our temperatures relative to the MeteoSwiss standard processing algorithm does not exceed 0.05 K at altitudes below 4.5 km, and does not exceed 0.08 K in an altitude range of 4.5 km to 6 km. This agreement shows that the neural network estimated temperature profiles are in excellent agreement with the standard algorithm. The method is robust and is able to estimate the temperature profiles with high accuracy for both clear and cloudy conditions. Moreover, the trained model can provide the statistical and model uncertainties of the estimated temperature profiles. Thus, the present study is a proof of concept that the trained NNs are able to generate temperature profiles along with a full-budget uncertainty. We present case studies showcasing the Bayesian neural network estimations for day and night measurements, as well as in clear and cloudy conditions. We have concluded that the proposed Bayesian neural network is an appropriate method for the statistical retrieval of temperature profiles.
DBI Galileon in the Effective Field Theory of Inflation: Orthogonal non-Gaussianities and constraints from the Trispectrum
Creators: name: Renaux-Petel, Sebastien
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Very few explicit inflationary scenarios are known to generate a large bispectrum of orthogonal shape. Dirac-Born-Infeld Galileon inflation, in which an induced gravity term is added to the DBI action, is one such model. We formulate it in the language of the effective field theory of inflation by identifying the unitary gauge operators that govern the behavior of its cosmological fluctuations. We show how to recover rather easily from this its power spectrum and bispectrum, which we calculated previously using standard cosmological perturbation theory. We push our calculations up to the determination of the fourth-order action and of the trispectrum, in which shapes absent in k-inflation arise due to the presence of higher-order derivative operators. We finally discuss the combined constraints set on this model by current observational bounds on the bispectrum and trispectrum.
description: 17 pages + 3 appendices, 7 figures. Some clarifications and references added to match the version published in JCAP. In addition, Eq. 3.14 corrected, without consequences
The shape of gold
Creators: name: Bally, Benjamin
name: Giacalone, Giuliano
name: Bender, Michael
Publisher: name: arXiv
Year: 2023
Subjects: subject: Nuclear Theory (nucl-th)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: Having a detailed theoretical knowledge of the low-energy structure of the heavy odd-mass nucleus $^{197}$Au is of prime interest as the structure of this isotope represents an important input to theoretical simulations of collider experiments involving gold ions performed worldwide at relativistic energies. In the present article, therefore, we report on new results on the structure of $^{197}$Au obtained from state-of-the-art multi-reference energy density functional (MR-EDF) calculations. Our MR-EDF calculations were realized using the Skyrme-type pseudo-potential SLyMR1, and include beyond mean-field correlations through the mixing, in the spirit of the Generator Coordinate Method (GCM), of particle-number and angular-momentum projected triaxially deformed Bogoliubov quasi-particle states. Comparison with experimental data shows that the model gives a reasonable description of $^{197}$Au with in particular a good agreement for most of the spectroscopic properties of the $3/2_1^+$ ground state. From the collective wave function of the correlated state, we compute an average deformation $\barβ(3/2_1^+)=0.13$ and $\barγ(3/2_1^+)=40^\circ$ for the ground state. We use this result to construct an intrinsic shape of $^{197}$Au representing a microscopically-motivated input for precision simulations of the associated collider processes. We discuss, in particular, how the triaxiality of this nucleus is expected to impact $^{197}$Au+$^{197}$Au collision experiments at ultrarelativistic energy.
description: 16 pages, 6 figures
title: Μετασχηματισμοί και θεωρητικές μεταγραφές του κτιρίου οργανισμού Δοξιάδη στην Αθήνα
Creators: name: Παπαδακη Μαρινα-Χαρα
name: Παυλακη Ευαγγελια
Publisher: name: Technical University of Crete
Year: 2015

description: Η παρούσα εργασία εστιάζει στην διερεύνηση και ερμηνεία των βασικών θεωρητικών αρχών του Κωνσταντίνου Δοξιάδη πραγματοποιώντας διαδοχικές αναγωγές για την ανάγνωσή τους στο κτίριο των γραφείων του επί της Στρατιωτικού Συνδέσμου και αργότερα στην επέμβαση επανάχρησης one Athens. Στόχος είναι η αξιολόγηση του αποτελέσματος της επέμβασης
επανάχρησης του κτιρίου Δοξιάδη με βάση το διάλογο που δημιουργούν οι θεωρίες με τη δεύτερη φάση του κτιρίου αλλά και με τον τρόπο διαχείρησης του ζητήματος της συλλογικής μνήμης. Η εργασία δομείται σε 3 μέρη.

Εισαγωγικά παρουσιάζεται η μέθοδος εκπόνησης της έρευνας και θέτονται ο σκοπός, το αντικείμενο και τα βασικά ερευνητικά ερωτήματα. Στην συνέχεια παρουσιάζονται τα ευρήματα της έρευνας, τα οποία περιλαμβάνουν την ανάλυση της πρώτης και της δεύτερης φάσης του κτιρίου (κτίριο Δοξιάδη και one Athens αντίστοιχα), με άξονα τις θεωρητικές θέσεις του Δοξιάδη, που αφορούν τη διεπιστημονική και ανθρωποκεντρική αντιμετώπιση του σχεδιασμού σε όλες τις κλίμακες. Επίσης μελετάται το ζήτημα των αξιών και των στοιχείων της μνήμης όπως αντιμετωπίζεται στις δύο περιπτώσεις. Μετά από αυτή την πολύπλευρη και συστηματική έρευνα των αρχών που διέπουν τις δύο επεμβάσεις, επιχειρείται η ερμηνεία των ευρημάτων αυτών καθώς
και η διεξαγωγή συμπερασμάτων με σκοπό την αξιολόγηση του τελικού αποτελέσματος της επέμβασης αποκατάστασης και επανάχρησης του κτιρίου.
FABRICATION AND CHARACTERIZATION OF NICKEL NANOWIRES
Creators: name: Gauss, Leninbro
Publisher: name: figshare
Year: 2022
Subjects: Behavioural ecology

description: This paper shows that nickel nanowires of length 11µm and diameters 800 and 15nm were grown within the pores of nuclear track polycarbonate membrane by electrodepositing nickel. Surface morphology and crystallographic structure of the deposited nanowires was investigated using SEM, TEM and XRD respectively. It is found that low current density gives good result, while high current density leads to the formation of curled nanowires. Fabricated nanowires were further investigated for electrical properties and found that nanowires obey ohm’s law. Through structural characterization it has been observed that the fabricated nanowires posses FCC lattice structure.
title: Νέα έξοδος. Ο κατακερματισμός του αστικού ιστού και ο αυτοαποκλεισμός πίσω από τείχη.
Creators: name: Παναγιωτοπουλου Χρυσαυγη
Publisher: name: Technical University of Crete
Year: 2015

description: Αφορμή της εργασίας στάθηκε η συνεχώς αυξανόμενη τάση περιχαράκωσης και πως επηρεάζει τις συνθήκες διαβίωσης μέσα από τα νέα αρχιτεκτονικά όρια που διαμορφώνονται στην πόλη, υλικά και μη, με ύστατο αποτέλεσμα ένα νέο μοντέλο οικιστικής ανάπτυξης και κατοίκησης.
    Αρχικά διερευνάται η πολιτική συνθήκη που γέννησε τις περιφράξεις και επιχειρείται μια εννοιολογική προσέγγιση του όρου μέσω της μαρξιστικής θεωρίας της «πρωταρχικής συσσώρευσης» που αποτέλεσε πυλώνα της φιλελεύθερης και νεοφιλελεύθερης πολιτικής. Η θεωρία αυτή αποτυπώθηκε επακριβώς στο σώμα της σύγχρονης πόλης του δυτικού κόσμου μέσω της περιχαράκωσης και της διάσπασης του αστικού ιστού.
    Η έξοδος από το κέντρο της πόλης και οι θεωρίες του κινήματος της Νέας Πολεοδομίας αποτέλεσαν βάση και προπομπός των κλειστών κοινοτήτων. Αναζητώνται οι βασικές τυπολογίες και    παρατίθεται ένα σύντομο ιστορικό από τις απαρχές του φαινομένου μέχρι την καθιέρωση του ως   κυρίαρχη τάση του real estate.
Τα παραδείγματα του Παλαιού Ψυχικού, του ‘Απολλώνιου’ οικισμού και του ‘Λόφου ‘Εντισον’ περιγράφονται ως χαρακτηριστικά παραδείγματα ως προς το πως μεταφράζεται εξελικτικά η παγκόσμια συνθήκη στην τοπική ιδιαιτερότητα της Ελλάδας.
     Κλείνοντας, προσεγγίζεται ο χωρικός αυτοαποκλεισμός ως πολιτική πράξη και αντιπαρατίθεται η δημιουργία «κοινών» ως πράξη αντιστρόφως ανάλογη και αντίδοτο του ατομικισμού και της ιδιώτευσης.
Geschehenes und Geschriebenes. Studien zu Ehren von Günther S. Henrich und Klaus-Peter Matschke, hrsg. v. Sebastian Kolditz und Ralf C. Müller
Creators: name: Werner, Jürgen
Publisher: name: Forum Classicum
Year: 2017

description: Rezension zu: Geschehenes und Geschriebenes. Studien zu Ehren von Günther S. Henrich und Klaus-Peter Matschke, hrsg. v. Sebastian Kolditz und Ralf C. Müller. Leipzig 2005. Eudora. 542 S.; 49 Abb., 2 Karten, 16 Tafeln. (ISBN 3-938533-03-X)
description: Forum Classicum, Nr. 1 (2006): Forum Classicum
title: Ο δρόμος ως αποτύπωμα των σχέσεων εξουσίας στον χώρο των πόλεων
Creators: name: Αθανασιου Ιωσηφ-Πετρος
Publisher: name: Technical University of Crete
Year: 2015

description: Η ερευνητική εργασία επί της ουσίας αναλώνεται στην μελέτη του στοιχείου του δρόμου στις πόλεις της δύσης υπό το πρίσμα αλλαγών σχέσεων εξουσίας. Κλείνει με την παρουσίαση σύγχρονων παραδειγμάτων στα οποία ο δρόμος χρησιμοποιείται κάθε φορά διαφορετικά αναφερόμενος σε προηγούμενες εποχές.
Simple Rings and Degree Maps
Creators: name: Nystedt, Patrik
name: Öinert, Johan
Publisher: name: arXiv
Year: 2013
Subjects: subject: Rings and Algebras (math.RA)
subject: FOS: Mathematics
subject: 12E15, 16D25, 16S32, 16S35, 16S36, 16W50, 17A99

description: For an extension A/B of neither necessarily associative nor necessarily unital rings, we investigate the connection between simplicity of A with a property that we call A-simplicity of B. By this we mean that there is no non-trivial ideal I of B being A-invariant, that is satisfying AI \subseteq IA. We show that A-simplicity of B is a necessary condition for simplicity of A for a large class of ring extensions when B is a direct summand of A. To obtain sufficient conditions for simplicity of A, we introduce the concept of a degree map for A/B. By this we mean a map d from A to the set of non-negative integers satisfying the following two conditions (d1) if a \in A, then d(a)=0 if and only if a=0; (d2) there is a subset X of B generating B as a ring such that for each non-zero ideal I of A and each non-zero a \in I there is a non-zero a' \in I with d(a') \leq d(a) and d(a'b - ba') < d(a) for all b \in X. We show that if the centralizer C of B in A is an A-simple ring, every intersection of C with an ideal of A is A-invariant, ACA=A and there is a degree map for A/B, then A is simple. We apply these results to various types of graded and filtered rings, such as skew group rings, Ore extensions and Cayley-Dickson doublings.
description: 17 pages
Probing Classifiers are Unreliable for Concept Removal and Detection
Creators: name: Kumar, Abhinav
name: Tan, Chenhao
name: Sharma, Amit
Publisher: name: arXiv
Year: 2022
Subjects: subject: Machine Learning (cs.LG)
subject: Computation and Language (cs.CL)
subject: FOS: Computer and information sciences

description: Neural network models trained on text data have been found to encode undesirable linguistic or sensitive concepts in their representation. Removing such concepts is non-trivial because of a complex relationship between the concept, text input, and the learnt representation. Recent work has proposed post-hoc and adversarial methods to remove such unwanted concepts from a model's representation. Through an extensive theoretical and empirical analysis, we show that these methods can be counter-productive: they are unable to remove the concepts entirely, and in the worst case may end up destroying all task-relevant features. The reason is the methods' reliance on a probing classifier as a proxy for the concept. Even under the most favorable conditions for learning a probing classifier when a concept's relevant features in representation space alone can provide 100% accuracy, we prove that a probing classifier is likely to use non-concept features and thus post-hoc or adversarial methods will fail to remove the concept correctly. These theoretical implications are confirmed by experiments on models trained on synthetic, Multi-NLI, and Twitter datasets. For sensitive applications of concept removal such as fairness, we recommend caution against using these methods and propose a spuriousness metric to gauge the quality of the final classifier.
Climate information for public health action: challenges and opportunities
Creators: name: Thomson, Madeleine C.
name: Mason, Simon J.
Publisher: name: Columbia University
Year: 2018
Subjects: Climatic changes
Climatic changes--Information services
Climatic changes--Decision making
Climatic changes--Health aspects
Public health

description: Throughout this book, we have sought to identify how, when and where climate information, based on historical data, monitoring products and predictions of future weather and climate can be used to inform health policy and practice. We have prioritized operational information over research opportunities to ensure a focus on practical outcomes. In this chapter, we provide a short review of climate information currently available, as described in detail in Chapters 4-9. We then explore how developments in technologies, institutional arrangements and the education of health professionals are providing new opportunities for translating climate information into a new resource for health-sector decision-making.
Cut-off of transverse waves through the solar transition region
Creators: name: Pelouze, Gabriel
name: Van Doorsselaere, Tom
name: Karampelas, Konstantinos
name: Riedl, Julia M.
name: Duckenfield, Timothy
Publisher: name: arXiv
Year: 2023
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Context. Transverse oscillations are ubiquitously observed in the solar corona, both in coronal loops and open magnetic flux tubes. Numerical simulations suggest that their dissipation could heat coronal loops, counterbalancing radiative losses. These models rely on a continuous driver at the footpoint of the loops. However, analytical works predict that transverse waves are subject to a cut-off in the transition region. It is thus unclear whether they can reach the corona, and indeed heat coronal loops. Aims. Our aims are to determine how the cut-off of kink waves affects their propagation into the corona, and to characterize the variation of the cut-off frequency with altitude. Methods. Using 3D magnetohydrodynamic simulations, we modelled the propagation of kink waves in a magnetic flux tube, embedded in a realistic atmosphere with thermal conduction, that starts in the chromosphere and extends into the corona. We drove kink waves at four different frequencies, and determined whether they experienced a cut-off. We then calculated the altitude at which the waves were cut-off, and compared it to the prediction of several analytical models. Results. We show that kink waves indeed experience a cut-off in the transition region, and we identified the analytical model that gives the best predictions. In addition, we show that waves with periods shorter than approximately 500 s can still reach the corona by tunnelling through the transition region, with little to no attenuation of their amplitude. This means that such waves can still propagate from the footpoints of loop, and result in heating in the corona.
description: Accepted for publication in A&A. 8 pages, 7 figures
Konrad Vössing (Hrsg): Biographie und Prosopographie
Creators: name: Schmitz, Dietmar
Publisher: name: Forum Classicum
Year: 2017

description: Rezension zu: Konrad Vössing (Hrsg): Biographie und Prosopographie. Historia Einzelschrift, 178. Festschrift für A.R. Birley. (Historia Einzelschriften - Bd. 178) Stuttgart: Franz Steiner Verlag 2005. 146 S. (ISBN 3-515-08538-6)
description: Forum Classicum, Nr. 1 (2006): Forum Classicum
title: Η τριλογία του ανθρώπου, αστικοί συντελεστές ως πεδία σύγκρουσης στη σύγχρονη πόλη
Creators: name: Αθανασιου Ιωσηφ-Πετρος
Publisher: name: Technical University of Crete
Year: 2015

description: Η διπλωματική εργασία παρουσιάζει με ουτοπική διάθεση το καθεστώς το οποίο θα έπρεπε οι βασικοί αστικοί συντελεστές εξουσίας, όπως ο ναός, το δημαρχείο και η τράπεζα. Οι τρεις αυτοί συντελεστές αποτέλεσαν πάντα τα πεδία σύγκρουσης των ανθρώπων στην σύγχρονη πόλη. πρόκειται για τα θεσμούς που καθόριζαν και καθορίζουν έως και σήμερα τον άνθρωπο…
title: Επαναπροσέγγιση της πολυκατοίκησης στην Κυψέλη
Creators: name: Αθανασιου Φιλιω
name: Πατσιογιαννη Κωνσταντινα
Publisher: name: Technical University of Crete
Year: 2015

description: Επαναπροσέγγιση της πολυκατοίκησης σε οικοδομικό τετράγωνο πυκνοδομημένου αστικού ιστού
Origin of the Coulomb Pseudopotential
Creators: name: Wang, Tao
name: Cai, Xiansheng
name: Chen, Kun
name: Svistunov, Boris V.
name: Prokof'ev, Nikolay V.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We address the outstanding problem of electron pairing in the presence of strong Coulomb repulsion at small to moderate values of the Coulomb parameter, $r_s \lesssim 2$, and demonstrate that the pseudopotential framework is fundamentally biased and uncontrolled. Instead, one has to break the net result into two distinctively different effects: the Fermi liquid renormalization factor and the change in the effective low-energy coupling. The latter quantity is shown to behave non-monotonically with an extremum at $ r_s\approx 0.75$. Within the random-phase approximation, Coulomb interaction starts to enhance the effective pairing coupling at $r_s >2$, and the suppression of the critical temperature is entirely due to the renormalized Fermi liquid properties. Leading vertex corrections change this picture only quantitatively. Our results call for radical reconsideration of the widely accepted repulsive pseudopotential approach and show the need for precise microscopic treatment of Coulomb interactions in the problem of superconducting instability.