cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Data Augmentation through Expert-guided Symmetry Detection to Improve Performance in Offline Reinforcement Learning
Creators: name: Angelotti, Giorgio
name: Drougard, Nicolas
name: Chanel, Caroline P. C.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (cs.LG)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: Offline estimation of the dynamical model of a Markov Decision Process (MDP) is a non-trivial task that greatly depends on the data available in the learning phase. Sometimes the dynamics of the model is invariant with respect to some transformations of the current state and action. Recent works showed that an expert-guided pipeline relying on Density Estimation methods as Deep Neural Network based Normalizing Flows effectively detects this structure in deterministic environments, both categorical and continuous-valued. The acquired knowledge can be exploited to augment the original data set, leading eventually to a reduction in the distributional shift between the true and the learned model. Such data augmentation technique can be exploited as a preliminary process to be executed before adopting an Offline Reinforcement Learning architecture, increasing its performance. In this work we extend the paradigm to also tackle non-deterministic MDPs, in particular, 1) we propose a detection threshold in categorical environments based on statistical distances, and 2) we show that the former results lead to a performance improvement when solving the learned MDP and then applying the optimized policy in the real environment.
description: Accepted at ICAART 2023
Study of the process $e^+e^-\to K_S^0 K^{\pm}π^{\mp} π^+π^-$ in the C.M. energy range 1.6--2.0 GeV with the CMD-3 detector
Creators: name: 3 Collaboration
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The cross section of the process $e^+e^- \to K_S^0 K^{\pm}π^{\mp}π^+π^-$ has been measured for the first time using a data sample of 185.4 pb$^{-1}$ collected with the CMD-3 detector at the VEPP-2000 $e^+e^-$ collider. With the $K_S^0\toπ^+π^-$ decay detection, 373$\pm$20 and 514$\pm$28 signal events have been selected with six and five reconstructed tracks, respectively, in the center-of-mass energy range 1.6--2.0 GeV. The total systematic uncertainty of the cross section is about 15\%. The study of the production dynamics allows us to extract contribution from the $e^+e^- \to f_1(1285)π^+π^-$ intermediate state and to measure the corresponding cross section. The intermediate states with the $f_1(1420)$ and $f_1(1510)$ resonances have been observed.
description: 21 pages, 17 figures. arXiv admin note: text overlap with arXiv:1912.05751
Thermal balance and quantum heat transport in nanostructures thermalized by local Langevin heat baths
Creators: name: Sääskilahti, K.
name: Oksanen, J.
name: Tulkki, J.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: Modeling of thermal transport in practical nanostructures requires making trade-offs between the size of the system and the completeness of the model. We study quantum heat transfer in a self-consistent thermal bath setup consisting of two lead regions connected by a center region. Atoms both in the leads and in the center region are coupled to quantum Langevin heat baths that mimic the damping and dephasing of phonon waves by anharmonic scattering. This approach treats the leads and the center region on same footing and thereby allows for a simple and physically transparent thermalization of the system, enabling also perfect acoustic matching between the leads and the center region. Increasing the strength of the coupling reduces the mean free path of phonons and gradually shifts phonon transport from ballistic regime to diffusive regime. In the center region, the bath temperatures are determined self-consistently from the requirement of zero net energy exchange between the local heat bath and each atom. By solving the stochastic equations of motion in frequency space and averaging over noise using the general fluctuation-dissipation relation derived by Dhar and Roy [J. Stat. Phys. 125, 801 (2006)], we derive the formula for thermal current, which contains the Caroli formula for phonon transmission function and reduces to the Landauer-Büttiker formula in the limit of vanishing coupling to local heat baths.
description: 16 pages, 9 figures, published version
Neue Forschung zur Kontamination von Kabinenluft
Creators: name: Scholz, Dieter
Publisher: name: Vereinigung Cockpit e.V.
Year: 2023
Subjects: subject: Luftfahrt
subject: Flugzeug
subject: Kabine
subject: Cockpit
subject: Luft
subject: Zapfluft
subject: Kontamination
subject: Triebwerk
subject: Öl
subject: TCP
subject: EASA
subject: FAA
subject: Lufthansa
subject: Airbus;
subject: Fraunhofer
subject: 620: Ingenieurwissenschaften

description: Mit Unterstützung der Europäischen Kommission hat die EASA das neue Forschungsprojekt "Cabin Air Quality Assessment of Long-Term Effects of Contaminants" ("CAQ III" - Bewertung der Kabinenluftqualität im Hinblick auf Langzeitwirkungen von Schadstoffen) ins Leben gerufen. Ziel ist, zusätzliche wissenschaftlich fundierte Daten über Cabin Air Contamination Events (CACE) zu gewinnen. Damit soll die Grundlage für eine umfassendere Bewertung von Gesundheitsrisiken geschaffen werden. Über erste Ergebnisse wurde in einem Workshop bei der EASA im Januar 2023 berichtet. Tierversuche sollen zur Bewertung von Fume Events durchgeführt werden. Mäuse sollen Öldämpfen ausgesetzt und deren Reaktion darauf gemessen werden. Die Mäuse müssen an 5 Tagen pro Woche über 4 Wochen bis zu 4 Stunden am Tag Luft einatmen, die mit pyrolisiertem Triebwerksöl kontaminiert wird. Über die Habersche Regel soll dies vergleichbar sein mit der Situation von Crews, die der Kabinenluft mit geringerer Konzentration der Schadstoffe ausgesetzt sind, aber dafür über die lange Zeit des ganzen Arbeitslebens.
title: Management of Security and Systemic Risk in IT Projects
Creators: name: Guggenmos, Florian
Publisher: name: University of Bayreuth
Year: 2022
Subjects: subject: IT Project Management
subject: IT Security
subject: Systemic Risk
subject: 000
subject: 330

description: The steady advance of digitization is presenting organizations with significant challenges. Not only does it offer opportunities in the form of new business models and optimized business processes, but it also reveals new risks and points of attack, mainly through the increased use and storage of personal data. Organizations must, therefore, always ensure an adequate level of IT security and data security. Overall, this leads to a sharp increase in IT projects, which organizations have to manage individually and across the board as part of an IT project portfolio. However, since IT projects are generally not independent of each other, organizations must also manage these dependencies. These interdependencies mean that in such IT project portfolios, systemic risks must also be considered in addition to project-specific risks. Research and practice already know a few such systemic risk measures. However, not all of them are equally suitable for every organization. Therefore, the organizations must select suitable systemic risk measures based on the available data and the preferred target dimension. This doctoral thesis aims to sensitize organizations to the interdependence of digitization and IT security and the resulting implications for managing systemic risks in IT project portfolios and to identify possible solutions. I mainly based this thesis on five research articles, which provide deeper insights into individual aspects of the topics covered in this thesis.
Quality Variations in Thyrotropin Alfa
Creators: name: Isaacs, James
name: Almeter, Philip
name: Henderson, Bradley
name: Hunter, Aaron
name: Samano-Garcia, Cristian
name: Platt, Thomas
name: Lodder, Robert
Publisher: name: figshare
Year: 2023
Subjects: Analytical spectrometry

description: Thyrotropin alfa is a heterodimeric glycoprotein containing human thyroid stimulating hormone (TSH). It is used as an adjunctive diagnostic tool for serum thyroglobulin (Tg) testing with or without radioiodine imaging in the follow-up of patients with well-differentiated thyroid cancer who have previously undergone thyroidectomy. Inter-lot variability in the Fourier transform near-infrared spectra of 30 samples obtained from four separate lots of Thyrogen® was detected in the Drug Quality Study (DQS). The vials fell into two distinct groups (rtst = 0.90, rlim= 0.98, p=0.02). In addition, one vial of the 30 (3%) appeared 4.7 multidimensional SDs from all of the other vials, suggesting that it also represents a different material.
Locus Soci@l, No 5 (2010)
Creators: name: Locus Soci@L
Publisher: name: Locus Soci@l
Year: 2010

description: Editorial...1-1 Reivindicando a Mary Richmond y su obra...6-30 Civic professionalism and social work: Mary E. Richmond's legacy in the 21st century...31-44 Mary Richmond: une pionenière mal connue...45-55 Mary Richmond dans le Service Social Italien: entre l'oubli et l'actualité...56-69 A "sociatria" em Jane Addams e Mary Richmond...70-78 Programa IV Seminário Internacional do CESSS...79-82
Quantum Gravity Corrections to the Fall of the Apple
Creators: name: Chawla, Samarth
name: Parikh, Maulik
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We consider the motion of a massive particle in a static, weakly-curved spacetime where the gravitational field is taken to be quantized. We find that Newton's law of free-fall is modified by quantum-gravitational corrections, in addition to the known special-relativistic and post-Newtonian modifications. The quantum-gravitational corrections take the form of stochastic noise in the particle trajectory, where the statistical properties of the noise depend on the quantum state of the gravitational field.
description: 13 pages, LaTeX. v3: references added, expanded discussion
Locus Soci@l, No 4 (2010)
Creators: name: Locus Soci@L
Publisher: name: Locus Soci@l
Year: 2010

description: Devir do estado providência e trabalho social...7-21 Supervisão em serviço social, percurso para o desenvolvimento profissional e pessoal: um estudo exploratório...46-65 De la compassion à la culpabilisation des pauvres. Vers un nouveau régime de traitement da la pauvrété en Europe?...22-33 Individualization de la dette social et travail avec autrui...34-45
Strongly anisotropic spin response as a signature of the helical regime in Rashba nanowires
Creators: name: Meng, Tobias
name: Loss, Daniel
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Rashba nanowires in a magnetic field exhibit a helical regime when the spin-orbit momentum is close to the Fermi momentum, k_F \approx k_{SO}. We show that this regime is characterized by a strongly anisotropic electron spin susceptibility, with an exponentially suppressed signal along one direction in spin space, and that there are no low frequency spin fluctuations along this direction. Since the spin response in the gapless regime k_F \not \approx k_{SO} has a power law behavior in all three directions, spin measurements provide a signature of the helical regime that complements spin-insensitive conductance measurements.
description: 7 pages, 1 figure, final version
Kate McGarrigle, "Heart Like A Wheel
Creators: name: (:Unav)
Publisher: name: Columbia University
Year: 2019

description: A woman plays guitar and sings various songs, including "We the People". Kate McGarrigle sings "Tell My Sister," "Walking Song," "Blues in D," "We Are The Heavenly Father's Children," "A Heart Is Like a Wheel," and "Travellin' On For Jesus.
Neuplatonismus und Ästhetik. Zur Transformationsgeschichte des Schönen
Creators: name: Chwalek, Burkard
Publisher: name: Forum Classicum
Year: 2017

description: Rezension zu: Neuplatonismus und Ästhetik. Zur Transformationsgeschichte des Schönen, hrsg. von Verena Olejniczak Lobsien und Claudia Olk. Berlin, New York (Walter de Gruyter) 2007, 256 S. (Transformationen der Antike, hrsg. von H. Böhme u. a, Bd. 2; ISBN 978-3-11-019225-4)
description: Forum Classicum, Nr. 2 (2008): Forum Classicum
An Identification of the Dirac Operator with the Parity Operator
Creators: name: Sperança, L. D.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mathematical Physics (math-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We provide a new derivation of the Dirac equation which promptly generalizes to higher spins. We apply this idea to spin-half Elko dark matter.
description: 8 pages
High-Order Coupled Fully-Connected Tensor Network Decomposition for Hyperspectral Image Super-Resolution
Creators: name: Jin, Diyi
name: Liu, Jianjun
name: Yang, Jinlong
name: Wu, Zebin
Publisher: name: arXiv
Year: 2022
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics

description: Hyperspectral image super-resolution addresses the problem of fusing a low-resolution hyperspectral image (LR-HSI) and a high-resolution multispectral image (HR-MSI) to produce a high-resolution hyperspectral image (HR-HSI). Tensor analysis has been proven to be an efficient method for hyperspectral image processing. However, the existing tensor-based methods of hyperspectral image super-resolution like the tensor train and tensor ring decomposition only establish an operation between adjacent two factors and are highly sensitive to the permutation of tensor modes, leading to an inadequate and inflexible representation. In this paper, we propose a novel method for hyperspectral image super-resolution by utilizing the specific properties of high-order tensors in fully-connected tensor network decomposition. The proposed method first tensorizes the target HR-HSI into a high-order tensor that has multiscale spatial structures. Then, a coupled fully-connected tensor network decomposition model is proposed to fuse the corresponding high-order tensors of LR-HSI and HR-MSI. Moreover, a weighted-graph regularization is imposed on the spectral core tensors to preserve spectral information. In the proposed model, the superiorities of the fully-connected tensor network decomposition lie in the outstanding capability for characterizing adequately the intrinsic correlations between any two modes of tensors and the essential invariance for transposition. Experimental results on three data sets show the effectiveness of the proposed approach as compared to other hyperspectral image super-resolution methods.
Pulling in Both Directions: How States Are Moving Toward Decarbonization While Continuing to Support Fossil Fuels
Creators: name: Payne, Heather
Publisher: name: Columbia University
Year: 2020
Subjects: Environmental law
Climate change mitigation
Environmental policy
Fossil fuels--Government policy
State governments

description: This Article seeks to first demonstrate the focus of state-level decarbonization on electricity generation, and, to a lesser extent, transportation. It then makes the case that these actions are both insufficient to address the scale of the problem we are facing and, in fact, that states continue to support fossil fuel use—intentionally, unintentionally, for political expediency, or perhaps because it was the right approach to achieve policy objectives a decade ago.29 More coordinated action by states— both in the political sphere and by regulatory bodies—is necessary to confront the challenge from climate change. This intentional, coordinated action will lessen the drag in the system and allow for the financial and political capital to implement the necessary change to achieve deep decarbonization more quickly.
Kinetic mechanism of chain folding in polymer crystallization
Creators: name: Stepanow, S.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: I develop a kinetic mechanism to explain chain folding in polymer crystallization which is based on the competition between the formation of stems, which is due to frequent occupations of trans states along the chains in the supercooled polymer melt, and the random coil structure of the polymer chains. Setting equal the average formation time of stems of length $% d_l$ with the Rouse time of a piece of polymer of the same arc length $d_l$ yields a lower bound for the thickness of stems and bundles. The estimated lamellar thickness is inversely proportional to the supercooling. The present approach emphasizes the importance of repulsive interactions in polymer crystallization, which are expected to be responsible for the logarithmic lamellar thickening and the increase of lamellar thickness with pressure. An expression for the growth rate is derived by considering the growth as a dynamic multistage process.
description: 14 pages
title: Ο επαναπροσδιορισμός του ορίου της σύγχρονης και της αρχαίας πόλης της Σπάρτης ως εργαλείο ανάδειξης του ιστορικού παλίμψηστου
Creators: name: Φωτοπούλου Φωτεινή
Publisher: name: Technical University of Crete
Year: 2013

description: Μη διαθέσιμο
Hans-Joachim Glücklich, Pompeji lebt. 2000 Jahre Texte, Bilder, Opern und Filme
Creators: name: Schmitz, Dietmar
Publisher: name: Forum Classicum
Year: 2017

description: Rezension zu: Hans-Joachim Glücklich, Pompeji lebt. 2000 Jahre Texte, Bilder, Opern und Filme. Göttingen: Vandenhoeck & Ruprecht. 2008.  (ISBN 978-3-525-25758-6)
description: Forum Classicum, Nr. 2 (2008): Forum Classicum
Locus Soci@l, No 3 (2009)
Creators: name: Locus Soci@L
Publisher: name: Locus Soci@l
Year: 2009

description: Perspectives on cross-national comparisons of social work...7-18 A construção da acção colectiva em processos de desenvolvimento sócio-territorial...91-104 Social work: the idea of a profession and the professional project...19-35 A biografia enquanto género historiográfico: uma possibilidade para o estudo da história do serviço social...105-115 Social work in Italy: problems and perspectives...36-47 Aproximación al trabajo social en españa...48-60 A profissão de assistente social em Portugal...61-89
The CAMELS project: public data release
Creators: name: Villaescusa-Navarro, Francisco
name: Genel, Shy
name: Anglés-Alcázar, Daniel
name: Perez, Lucia A.
name: Villanueva-Domingo, Pablo
name: Wadekar, Digvijay
name: Shao, Helen
name: Mohammad, Faizan G.
name: Hassan, Sultan
name: Moser, Emily
name: Lau, Erwin T.
name: Valle, Luis Fernando Machado Poletti
name: Nicola, Andrina
name: Thiele, Leander
name: Jo, Yongseok
name: Philcox, Oliver H. E.
name: Oppenheimer, Benjamin D.
name: Tillman, Megan
name: Hahn, ChangHoon
name: Kaushal, Neerav
name: Pisani, Alice
name: Gebhardt, Matthew
name: Delgado, Ana Maria
name: Caliendo, Joyce
name: Kreisch, Christina
name: Wong, Kaze W. K.
name: Coulton, William R.
name: Eickenberg, Michael
name: Parimbelli, Gabriele
name: Ni, Yueying
name: Steinwandel, Ulrich P.
name: La Torre, Valentina
name: Dave, Romeel
name: Battaglia, Nicholas
name: Nagai, Daisuke
name: Spergel, David N.
name: Hernquist, Lars
name: Burkhart, Blakesley
name: Narayanan, Desika
name: Wandelt, Benjamin
name: Somerville, Rachel S.
name: Bryan, Greg L.
name: Viel, Matteo
name: Li, Yin
name: Irsic, Vid
name: Kraljic, Katarina
name: Vogelsberger, Mark
Publisher: name: arXiv
Year: 2022
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Artificial Intelligence (cs.AI)
subject: Machine Learning (cs.LG)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: The Cosmology and Astrophysics with MachinE Learning Simulations (CAMELS) project was developed to combine cosmology with astrophysics through thousands of cosmological hydrodynamic simulations and machine learning. CAMELS contains 4,233 cosmological simulations, 2,049 N-body and 2,184 state-of-the-art hydrodynamic simulations that sample a vast volume in parameter space. In this paper we present the CAMELS public data release, describing the characteristics of the CAMELS simulations and a variety of data products generated from them, including halo, subhalo, galaxy, and void catalogues, power spectra, bispectra, Lyman-$α$ spectra, probability distribution functions, halo radial profiles, and X-rays photon lists. We also release over one thousand catalogues that contain billions of galaxies from CAMELS-SAM: a large collection of N-body simulations that have been combined with the Santa Cruz Semi-Analytic Model. We release all the data, comprising more than 350 terabytes and containing 143,922 snapshots, millions of halos, galaxies and summary statistics. We provide further technical details on how to access, download, read, and process the data at \url{https://camels.readthedocs.io}.
description: 18 pages, 3 figures. More than 350 Tb of data from thousands of simulations publicly available at https://www.camel-simulations.org
Revisiting fundamental properties of TiO$_2$ nanoclusters as condensation seeds in astrophysical environments
Creators: name: Sindel, J. P.
name: Gobrecht, D.
name: Helling, Ch.
name: Decin, L.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: The formation of inorganic cloud particles takes place in several atmospheric environments including those of warm, hot, rocky and gaseous exoplanets, brown dwarfs, and AGB stars. The cloud particle formation needs to be triggered by the in-situ formation of condensation seeds since it can not be assumed that such condensation seeds preexist in these chemically complex gas-phase environments. We aim to develop a methodology to calculate the thermochemical properties of clusters as key inputs to model the formation of condensation nuclei in gases of changing chemical composition. TiO$_2$ is used as benchmark species for cluster sizes N = 1 - 15. We create 90000 candidate geometries, for cluster sizes N = 3 - 15. We employ a hierarchical optimisation approach, consisting of a force field description, density functional based tight binding (DFTB) and all-electron density functional theory (DFT) to obtain accurate energies and thermochemical properties for the clusters. We find B3LYP/cc-pVTZ including Grimmes empirical dispersion to perform most accurately with respect to experimentally derived thermochemical properties of the TiO$_2$ molecule. We present a hitherto unreported global minimum candidate for size N = 13. The DFT derived thermochemical cluster data are used to evaluate the nucleation rates for a given temperature-pressure profile of a model hot Jupiter atmosphere. We find that with the updated and refined cluster data, nucleation becomes unfeasible at slightly lower temperatures, raising the lower boundary for seed formation in the atmosphere. The approach presented in this paper allows to find stable isomers for small (TiO$_2$)$_N$ clusters. The choice of functional and basis set for the all-electron DFT calculations have a measurable impact on the resulting surface tension and nucleation rate and the updated thermochemical data is recommended for future considerations.
description: 20 pages, 14 figures. Accepted for publication in A&A
Driven Geometric Phase Gates with Trapped Ions
Creators: name: Lemmer, A.
name: Bermudez, A.
name: Plenio, M. B.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We describe a hybrid laser-microwave scheme to implement two-qubit geometric phase gates in crystals of trapped ions. The proposed gates can attain errors below the fault-tolerance threshold in the presence of thermal, dephasing, laser-phase, and microwave-intensity noise. Moreover, our proposal is technically less demanding than previous schemes, since it does not require a laser arrangement with interferometric stability. The laser beams are tuned close to a single vibrational sideband to entangle the qubits, while strong microwave drivings provide the geometric character to the gate, and thus protect the qubits from these different sources of noise. A thorough analytic and numerical study of the performance of these gates in realistic noisy regimes is presented.
description: closer to published version
Speyer, W, Frühes Christentum im antiken Strahlungsfeld. Kleine Schriften III
Creators: name: Wissemann, Michael
Publisher: name: Forum Classicum
Year: 2017

description: Rezension zu: Speyer, W, Frühes Christentum im antiken Strahlungsfeld.
Kleine Schriften III, hrsg. von Coroleu Oberparleiter, V., Tübingen (Mohr Siebeck) 2007 (Wissenschaftliche Untersuchungen zum Neuen Testament Bd. 213), 332 S., (ISBN 978-3-16-149264-8)
description: Forum Classicum, Nr. 2 (2008): Forum Classicum
Locus Soci@l, No 2 (2009)
Creators: name: Locus Soci@L
Publisher: name: Locus Soci@l
Year: 2009

description: Editorial...4-5 Assistentes sociais e profissões sociais em Portugal: notas sobre um itinerário de pesquisa...7-19 A política de cuidados domiciliários em instituições de solidariedade social: risco ou protecção efectiva?...67-80 Profissões sociais e género: perspectivas em torno do debate sobre serviço social e profissões femininas...21-28 Pequenos acontecimentos para novos rumos: um estudo de caso sobre os factores promotores de trajectórias de inclusão na intervenção com jovens com percursos de risco...81-102 Identidades, incertezas e tarefas do serviço social contemporâneo...29-46 A investigação em serviço social em Portugal: uma aproximação a partir da formação pós-graduada...103-114 As identidades profissionais em educação de infância...46-64
Experimental Verification of Charge Soliton Excitations in the Ionic Mott-Peierls Ferroelectric, TTF-CA
Creators: name: Takehara, R.
name: Adachi, H.
name: Sunami, K.
name: Miyagawa, K.
name: Miyamoto, T.
name: Okamoto, H.
name: Horiuchi, S.
name: Kanoda, K.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Strong coupling of charge, spin, and lattice in solids brings about emergent elementary excitations with their intertwining and, in one dimension, solitons are known as such. The charge-transferred organic ferroelectric, TTF-CA, has been argued to host charge solitons; however, the existence of the charge solitons remains unverified. Here, we demonstrate that the charge-transport gap in the ionic Mott-Peierls insulating phase of TTF-CA is an order of magnitude smaller than expected from quasiparticle excitations, however, being entirely consistent with the charge soliton excitations. We further suggest that charge and spin solitons move with similar diffusion coefficients in accordance with their coexistence. These results provide a basis for the thermal excitations of the emergent solitons.
description: 6 pages, 3 figures
title: Αθλητικές εγκαταστάσεις στην λίμνη των Ιωαννίνων | 4 structures in a Row
Creators: name: Βαιμακης-Τσογκας Δημητριος
Publisher: name: Technical University of Crete
Year: 2014

description: Στην διπλωματική αυτή εργασία, περιοχή μελέτης επιλέχθηκε η Λιμνοπούλα Ιωαννίνων. Ένας χώρος άθλησης μέσα στην πόλη των Ιωαννίνων που περιλαμβάνει εγκαταστάσεις ποικίλων αθλημάτων, υδάτινων και μη. Η έκταση του χώρου αυτού είναι περίπου 72 στρέμματα. Σήμερα η περιοχή χαρακτηρίζεται από αθλητικές εγκαταστάσεις διάσπαρτες σε διάφορα σημεία, χωρίς μια ολοκληρωμένη οργάνωση τόσο του χώρου των δραστηριοτήτων, όσο και των χώρων μεταξύ των κτιρίων. Παράλληλα, όλοι οι χώροι χαρακτηρίζονται από εγκατάλειψη και φθορά. Ο δημόσιος χαρακτήρας του χώρου έχει χαθεί. Η περιοχή , παρόλο που βρίσκεται σε παραλίμνιο μέρος, έχει χάσει πλήρως την επαφή με τη λίμνη και δεν αποτελεί μέρος που θα ο κάθε πολίτης θα μπορούσε να καταφύγει για να περάσει τον ελεύθερο του χρόνου είτε για να χαλαρώσει είτε να αθληθεί.
Οι στόχοι της πρότασης ανασχεδιασμού και αναδιαμόρφωσης των εγκαταστάσεων του Ναυτικού ομίλου Ιωαννίνων και των ευρύτερων αθλητικών εγκαταστάσεων είναι :
• Η οργάνωση των αθλητικών εγκαταστάσεων, υπαιθρίων και μη
• Να επαναπροσδιοριστεί ο δημόσιος χαρακτήρας της περιοχής
• Η ανάπλαση του συγκεκριμένου παραλιακού μετώπου, με σκοπό την αναζωογόνηση της περιοχής
• Να αναδειχθεί η ιδιομορφία της περιοχής
• Να αξιοποιηθεί και να επαναπροσδιοριστεί η σχέση του χώρου με τη λίμνη και το υγρό στοιχείο, επαναπροσδιορισμός ορίου νερού ξηράς
• Να αναδειχθεί ο πλούτος και η ποικιλία αυτής της επαφής
• Να αναδειχθεί ο ναυτικός όμιλος σε προορισμό 24ωρης λειτουργίας με χρήσεις αθλητισμού, αναψυχής, πολιτισμού και εργασίας.
Στόχος της εργασίας είναι ανάδειξη της περιοχής σε επίνειο των Ιωαννίνων, επίκεντρο ποικίλων δραστηριοτήτων, αθλητικών και πολιτιστικών, τοποθετημένων δίπλα στο υδάτινο περιβάλλον της λίμνης.

Η πρόταση ανασχεδιασμού και επαναπροσδιορισμού του χώρου εστιάζει στη δημιουργία επαρκέστερων κτιριακών και υπαίθριων υποδομών. Η αποθήκευση σκαφών , οι παράκτιες διαμορφώσεις , τα υπόστεγα (ως χώροι μετάβασης από τις εγκαταστάσεις στη θάλασσα) αποτέλεσαν σημεία ιδιαίτερης εστίασης καθώς καλούνται να εξυπηρετήσουν τις ανάγκες τόσο των αθλητών που τις χρησιμοποιούν, όσο των κατοίκων των Ιωαννίνων συνολικά.

H πόλη των Ιωαννίνων τρέφεται και τρεφόταν από τη λίμνη. Η αξεπέραστη σε φυσικό κάλως ομορφιά  και οι ποικίλες δραστηριότητες που αναπτύσσονται στο όριο της πόλης και της λίμνης, αποτέλεσε έναυσμα για την ανάπλαση της συγκεκριμένης περιοχής.
Locus Soci@l, No 1 (2008)
Creators: name: Locus Soci@L
Publisher: name: Locus Soci@l
Year: 2008

description: Editorial...4-5 Social work research development in the United States...7-13 Os campos paradigmáticos do serviço social: proposta para uma categorização das teorias em presença...65-80 Social work education and research: present experiences and tendencies in Finland and other Nordic countries...14-23 O discurso histórico sobre o serviço social: uma perspectiva analítica sobre o quadro de produção científica em Portugal (1987-2007)...81-89 Social work research and evaluation: the research-minded practitioner...24-31 Novas políticas sociais novas: entre "belas" e "senãos"...90-94 Investigação em serviço social no Portugal contemporâneo. Paradoxos e desafios...32-47 A investigação em serviço social em Portugal: trajectórias e perspectivas...48-63
Measuring cavity powers of active galactic nuclei in clusters using a hybrid X-ray-radio method -- A new window on feedback opened by subarcsecond LOFAR-VLBI observations
Creators: name: Timmerman, R.
name: van Weeren, R. J.
name: Botteon, A.
name: Röttgering, H. J. A
name: McNamara, B. R.
name: Sweijen, F.
name: Bîrzan, L.
name: Morabito, L. K.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Measurements of the quantity of radio-mode feedback injected by an active galactic nucleus into the cluster environment have mostly relied on X-ray observations, which reveal cavities in the intracluster medium excavated by the radio lobes. However, the sensitivity required to accurately constrain the dimensions of these cavities has proven to be a major limiting factor and is the main bottleneck on high-redshift measurements. We describe a hybrid method based on a combination of X-ray and radio observations, which aims to enhance our ability to study radio-mode feedback. In this paper, we present one of the first samples of galaxy clusters observed with the International LOFAR Telescope (ILT) at 144 MHz and use this sample to test the hybrid method at lower frequencies than before. By comparing our measurements with results found in literature based on the traditional method using only X-ray observations, we find that the hybrid method provides consistent results to the traditional method. In addition, we find that the correlation between the traditional method and the hybrid method improves as the X-ray cavities are more clearly defined. This suggests that using radio lobes as proxies for cavities may help to circumvent systematic uncertainties in the cavity volume measurements. Encouraged by the high volume of unique ILT observations successfully processed, this hybrid method enables radio-mode feedback to be studied at high redshifts for the first time even for large samples of clusters.
description: Accepted for publication in A&A. 16 pages, 7 figures
A "sociatria" em Jane Addams e Mary Richmond
Creators: name: Branco, Francisco
Publisher: name: Locus Soci@l
Year: 2010

description: Assinalando os 150 anos do nascimento de Jane Addams e Mary Richmond procura-se neste artigo contribuir para resgatar a relevância da obra e a actualidade do seu pensamento. Com base na noção de «sociatria», introduzida por Richmond, revisitam-se os caminhos da fundação de duas tradições no Serviço Social, com recorrência erigidas como irreconciliáveis, exploram-se as convergências no seu pensamento e acção e apontam-se as possibilidades da sua articulação profícua no actual contexto societário e de intervenção em Serviço Social.
description: Locus Soci@l, No 5 (2010)
Searching for compact objects in binaries with Gaia DR3
Creators: name: Fu, Jin-Bo
name: Gu, Wei-Min
name: Zhang, Zhi-Xiang
name: Yi, Tuan
name: Qi, Sen-Yu
name: Zheng, Ling-Lin
name: Liu, Jifeng
Publisher: name: arXiv
Year: 2022
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We search for compact objects in binaries based on Gaia DR3. A sample of ten targets is derived under the conditions: radial velocity variable, low temperature ($T_{\rm eff} < 6000$ K), high mass function ($f(M_2) > 1 M_\odot$), and ellipsoidal-like light curves. Two targets have LAMOST spectroscopic observations, one of which is a double-lined spectroscopic binary. The observational data of seven targets are not self-consistent, since their photometric periods are even shorter than the theoretical minimum orbital periods calculated by the stellar parameters from Gaia DR3. After excluding these seven inconsistent targets and another target contaminated by a near-bright star, the remaining two targets may contain compact objects worth follow-up observations. This work may serve as an example to demonstrate the feasibility of searching for compact objects in the massive Gaia data.
description: 15 pages, 8 figures, accepted for publication in ApJ
Variable selection for general index models via sliced inverse regression
Creators: name: Jiang, Bo
name: Liu, Jun S.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Methodology (stat.ME)
subject: FOS: Computer and information sciences

description: Variable selection, also known as feature selection in machine learning, plays an important role in modeling high dimensional data and is key to data-driven scientific discoveries. We consider here the problem of detecting influential variables under the general index model, in which the response is dependent of predictors through an unknown function of one or more linear combinations of them. Instead of building a predictive model of the response given combinations of predictors, we model the conditional distribution of predictors given the response. This inverse modeling perspective motivates us to propose a stepwise procedure based on likelihood-ratio tests, which is effective and computationally efficient in identifying important variables without specifying a parametric relationship between predictors and the response. For example, the proposed procedure is able to detect variables with pairwise, three-way or even higher-order interactions among $p$ predictors with a computational time of $O(p)$ instead of $O(p^k)$ (with $k$ being the highest order of interactions). Its excellent empirical performance in comparison with existing methods is demonstrated through simulation studies as well as real data examples. Consistency of the variable selection procedure when both the number of predictors and the sample size go to infinity is established.
description: Published in at http://dx.doi.org/10.1214/14-AOS1233 the Annals of Statistics (http://www.imstat.org/aos/) by the Institute of Mathematical Statistics (http://www.imstat.org)
Generalized spiral transformation for high-resolution sorting of vortex modes
Creators: name: Cheng, Jie
name: Wan, Chenhao
name: Zhan, Qiwen
Publisher: name: arXiv
Year: 2022
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We propose a generalized spiral transformation scheme that is versatile to incorporate various types of spirals such as the Archimedean spiral and the Fermat spiral. Taking advantage of the equidistant feature, we choose the Archimedean spiral mapping and demonstrate its application in high-resolution orbital angular momentum mode sorting. Given a fixed minimum spiral width, the Archimedean spiral mapping shows superior performance over the logarithmic spiral mapping. This generalized transformation scheme may also find various applications in optical transformation and can be easily extended to other fields related to conformal mapping.
title: Tracers' flow in fractured reservoirs
Creators: name: Κουβελα Ιωαννα
Publisher: name: Technical University of Crete
Year: 2015

description: This diploma thesis focuses on examining the fluid flow in a fractured reservoir, as well as the simultaneous flow of fracture/matrix systems. Fractured reservoirs have many differences comparing with the conventional ones. A reservoir might be naturally fractured, but also fracturing is a technique that is applied in the subsurface sediments, in order to improve the oil recovery during the production.
In addition, there is an extensive description of the recovery mechanisms of a fractured reservoir, according to the literature, although it is still a complicated issue the way that the fractures contribute to the hydrocarbon recovery and the performance of a reservoir.
Finally, it is mentioned the use of tracers applications in the oil field. Particularly, in this study, tracers are involved to understand and visualize, in some manner, the fluid flow in a fractured reservoir.
Mary Richmond dans le Service Social Italien: entre l'oubli et l'actualité
Creators: name: Delavalle, Marilena
Publisher: name: Locus Soci@l
Year: 2010

description: En cet article, l’attention est concentrée sur le travail de Richmond What is Social Case Work? cela contient les éléments qui pourraient s’avérer l’existence d’une tradition de recherche dans le travail social et la persistance des facteurs considérait toujours critique au niveau théorique et opérationnel. Parmi ces derniers sont considérés : le processus de la construction théorique du travail social, de l’amélioration du potentiel et des ressources, du principe de la personnalisation comme base d’un processus démocratique et de l’attention simultanée au citoyen dans sa subjectivité, mais également à son envi[1]ronnement aussi bien que à la structure institutionnelle et organisationnelle dans lesquels les assistants sociaux effectuent leurs activités, faisant de ce fait à référence à la triple optique qui caractérise le travail social italien
description: Locus Soci@l, No 5 (2010)
Mary Richmond: une pionenière mal connue
Creators: name: Hurtubise, Yves
Publisher: name: Locus Soci@l
Year: 2010

description: L’anniversaire de naissance de Mary Richmond est l’occasion de s’interroger sur la portée de son œuvre et de ses contributions à la profession et à la discipline du travail social. Un examen de diverses sources d’informations académiques montre qu’elle a acquis une grande notoriété, mais que ses contributions sont mal connues. Au-delà d’une opposition à Jane Addams et du développement d’une approche plus rationnelle des problèmes sociaux, les auteurs qui en ont parlé ont exprimé bien peu d’informations sur la complexité de sa pensée. Depuis une quinzaine d’années, à la suite de nouveaux travaux, nous voyons apparaître un portrait plus complexe de la pensée de Richmond ; l’appropriation par les milieux professionnel et académique de son œuvre devrait fournir des éléments de réflexion pour aborder les défis du travail social contemporain.
description: Locus Soci@l, No 5 (2010)
Detection of Chemo-Kinematical Structures in Leo I
Creators: name: Jara, A. G. Alarcon
name: Fellhauer, M.
name: Simon, J.
name: del Pino, A.
name: Fu, S. W.
name: Sohn, S. T.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Context: A variety of formation models for dwarf spheroidal (dSph) galaxies have been proposed in the literature, but generally they have not been quantitatively compared with observations. Aims: We search for chemodynamical patterns in our observational data set and compare the results with mock galaxies consisting of pure random motions, and simulated dwarfs formed via the dissolving star cluster and tidal stirring models. Methods: We made use of a new spectroscopic data set for the Milky Way dSph Leo I, combining 288 stars observed with Magellan/IMACS and existing Keck/DEIMOS data, to provide velocity and metallicity measurements for 953 Leo I member stars. We used a specially developed algorithm called Beacon to detect chemo-kinematical patterns in the observed and simulated data. Results: After analysing the Leo I data, we report the detection of 14 candidate streams of stars that may have originated in disrupted star clusters. The angular momentum vectors of these streams are randomly oriented, consistent with the lack of rotation in Leo I. These results are consistent with the predictions of the dissolving cluster model. In contrast, we find fewer candidate stream signals in mock data sets that lack coherent motions ~99% of the time. The chemodynamical analysis of the tidal stirring simulation produces streams that share a common orientation of their angular momenta, which is inconsistent with the Leo I data. Conclusions: Even though it is very difficult to distinguish which of the detected streams are real and which are only noise, we can be certain that there are more streams detected in the observational data of Leo I than expected in pure random data.
description: 12 pages, accepted by A&A
Canonical representatives for divisor classes on tropical curves and the Matrix-Tree Theorem
Creators: name: An, Yang
name: Baker, Matthew
name: Kuperberg, Greg
name: Shokrieh, Farbod
Publisher: name: arXiv
Year: 2013
Subjects: subject: Combinatorics (math.CO)
subject: Algebraic Geometry (math.AG)
subject: Metric Geometry (math.MG)
subject: FOS: Mathematics

description: Let $Γ$ be a compact tropical curve (or metric graph) of genus $g$. Using the theory of tropical theta functions, Mikhalkin and Zharkov proved that there is a canonical effective representative (called a break divisor) for each linear equivalence class of divisors of degree $g$ on $Γ$. We present a new combinatorial proof of the fact that there is a unique break divisor in each equivalence class, establishing in the process an "integral" version of this result which is of independent interest. As an application, we provide a "geometric proof" of (a dual version of) Kirchhoff's celebrated Matrix-Tree Theorem. Indeed, we show that each weighted graph model $G$ for $Γ$ gives rise to a canonical polyhedral decomposition of the $g$-dimensional real torus ${\rm Pic}^g(Γ)$ into parallelotopes $C_T$, one for each spanning tree $T$ of $G$, and the dual Kirchhoff theorem becomes the statement that the volume of ${\rm Pic}^g(Γ)$ is the sum of the volumes of the cells in the decomposition.
description: 20 pages -- Final version to appear in Forum of Math, Sigma
title: Εκτίμηση της ποιότητας των εξανθρακωμάτων από δημοτικά και ζωικά απόβλητα για ενεργειακές ή περιβαλλοντικές εφαρμογές
Creators: name: Σπυριδακης Στυλιανος
Publisher: name: Technical University of Crete
Year: 2015

description:        Η παρούσα διπλωματική εργασία είχε ως σκοπό την παραγωγή βιοεξανθρακωμάτων από βιομηχανικά απόβλητα της Κρήτης, μέσω πυρόλυσης, προκειμένου να διερευνηθεί η καταλληλότητά τους για ενεργειακές ή/και περιβαλλοντικές εφαρμογές. Τα δείγματα της υπολειμματικής βιομάζας πυρολύθηκαν σε αντιδραστήρα σε τρείς τελικές θερμοκρασίες των 450οC, 550οC και 650οC, και υπολογίστηκε η απόδοση σε βιοεξανθράκωμα, βιοέλαιο και βιοαέριο. Στη συνέχεια, έλαβαν χώρα μετρήσεις για τον προσδιορισμό βασικών φυσικών και χημικών χαρακτηριστικών των βιοεξανθρακωμάτων, όπως μέτρηση της ειδικής επιφάνειας, του pH και της ηλεκτρικής αγωγιμότητας, στοιχειακή ανάλυση, μέτρηση της Ανώτερης Θερμογόνου Δύναμης (ΑΘΔ) και τέλος προσδιορισμός των μεταλλικών στοιχείων και ιχνοστοιχείων, τα οποία παίζουν σημαντικό ρόλο στην αξιοποίηση των εν δυνάμει καυσίμων και μέσων περιβαλλοντικής προστασίας.
       Τα αποτελέσματα έδειξαν ότι η αύξηση της θερμοκρασίας πυρόλυσης οδήγησε σε μείωση της απόδοσης του βιοεξανθρακώματος με ταυτόχρονη αύξηση του ποσοστού του βιοαερίου και εμπλουτισμού του σε τέφρα μειώνοντας ταυτόχρονα την περιεκτικότητα του μόνιμου άνθρακα σ’ αυτό. Η θερμοκρασία της πυρόλυσης επηρέασε τις φυσικές και χημικές ιδιότητες των βιοεξανθρακωμάτων. Η αύξηση της θερμοκρασίας επέφερε αύξηση στην ειδική επιφάνεια έως και 140% καθώς και αύξηση της τιμής του pH, αποτρέποντας έκπλυση τοξικών μετάλλων από τα παραγόμενα βιοεξανθρακώματα. Γενικά, η αύξηση της θερμοκρασίας πυρόλυσης οδήγησε σε αύξηση της συγκέντρωσης των K, Ca, Mg και Fe, τα οποία θεωρούνται θρεπτικά συστατικά του εδάφους, στα παραγόμενα βιοεξανθρακώματα. Επίσης, η περιεκτικότητα των ιχνοστοιχείων στα βιοεξανθρακώματα ήταν πολύ χαμηλότερη από τα επιτρεπτά όρια των Διεθνών Οργανισμών. Τέλος, αξιοσημείωτη ήταν η αύξηση της θερμογόνου δύναμης των βιοεξανθρακωμάτων σε σύγκριση με την τροφοδοσία, στα επίπεδα των αντίστοιχων τιμών για γαιάνθρακες χαμηλής τάξης, καθιστώντας τα πιθανόν κατάλληλα για ενεργειακές εφαρμογές.
Efficient Langevin Simulation of Coupled Classical Fields and Fermions
Creators: name: Barros, Kipton
name: Kato, Yasuyuki
Publisher: name: arXiv
Year: 2013
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We introduce an efficient Langevin method to study bilinear Fermionic Hamiltonians interacting with classical fields. Our method is suitable for very large systems and offers high accuracy. To demonstrate the method, we study complex non-coplanar chiral spin textures on the triangular Kondo lattice model. We also explore non-equilibrium mesoscale physics such as chiral domain coarsening and Z2 vortex annihilation.
description: 5 pages, 3 figures
Civic professionalism and social work: Mary E. Richmond's legacy in the 21st century
Creators: name: Agnew, Elizabeth
Publisher: name: Locus Soci@l
Year: 2010

description: Mary E. Richmond (1861-1928) helped to create the profession of social work during a unique era of progressive reform in American culture. At the end of her life, the First International Conference of Social Work, held in Paris, represented a movement—which continues today—to develop and coordinate social work practices in nations around the world. This article reviews Richmond’s specific contributions to social work in her own cultural and historical context, considers select examples of her international influence in the 20th century, and argues for her continued relevance in the 21st century global context. I argue that Richmond’s central contribution was a “civic” conception of social work. This conception remains important and necessary today, as social workers respond to new global challenges, cultural and religious diversity, and an emphasis on human rights.
description: Locus Soci@l, No 5 (2010)