cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The elusive tidal tails of the Milky Way globular cluster NGC 7099
Creators: name: Piatti, A. E.
name: Carballo-Bello, J. A.
name: Mora, M. D.
name: Cenzano, C.
name: Navarrete, C.
name: Catelan, M.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present results on the extra-tidal features of the Milky Way globular cluster NGC 7099, using deep gr photometry obtained with the Dark Energy Camera (DECam). We reached nearly 6 mag below the cluster Main Sequence (MS) turnoff, so that we dealt with the most suitable candidates to trace any stellar structure located beyond the cluster tidal radius. From star-by-star reddening corrected color-magnitude diagrams (CMDs) we defined four adjacent strips along the MS, for which we built the respective stellar density maps, once the contamination by field stars was properly removed. The resulting field star cleaned stellar density maps show a short tidal tail and some scattered debris. Such extra-tidal features are hardly detected when much shallower Gaia DR2 data sets are used and the same CMD field star cleaning procedure is applied. Indeed, by using 2.5 magnitudes below the cluster MS turnoff as the faintest limit (G < 20.5 mag), cluster members turned out to be distributed within the cluster's tidal radius, and some hints for field star density variations are found across a circle of radius 3.5deg centered on the cluster and with similar CMD features as cluster stars. The proper motion distribution of these stars is distinguishable from that of the cluster, with some superposition, which resembles that of stars located beyond 3.5deg from the cluster center.
description: 7 pages, 9 figures. Accepted for publication in Astronomy & Astrophysics
The Chemical Distribution in a Subluminous Type Ia Supernova: HST Images of the SN 1885 Remnant
Creators: name: Fesen, Robert A.
name: Hoeflich, Peter A.
name: Hamilton, Andrew J. S.
name: Hammell, Molly C.
name: Gerardy, Christopher L.
name: Khokhlov, Alexei M.
name: Wheeler, J. Craig
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present HST images of the remnant of SN 1885 seen in absorption against M31's bulge via resonance lines of Ca I, Ca II, Fe I, and Fe II. Viewed in CaII H & K line absorption, the remnant appears as a nearly black circular spot with an outermost angular radius of 0.40" +/- 0.025" implying r = 1.52 pc and a 120 yr average expansion velocity of 12400 +/-1400 km/s. The strongest Ca II absorption is organized in a broken ring structure with a radius of 0.20" (=6000 km/s) with several apparent absorption `clumps' of an angular size near the pixel scale of 0.05" (= 1500 km/s). The detection of Ca II clumps is the first direct evidence for some instabilities and the existence of a deflagration phase in SNe Ia or, alternatively, mixing induced by radioactive decay of 56^Ni over time scales of seconds or days. However, the degree of mixing allowed by the observed images is much smaller than current 3D calculations for Rayleigh-Taylor dominated deflagration fronts. The images also require a central region of no or little Ca but iron group elements indicative of burning under sufficiently high densities for electron capture taking place, i.e., burning prior to a significant pre-expansion of the WD.
description: 18 pages, 14 figures. Accepted for publication in ApJ
Slow light in saturable absorbers
Creators: name: Macke, Bruno
name: Ségard, Bernard
Publisher: name: arXiv
Year: 2008
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: In connection with the experiments recently achieved on doped crystals, biological samples, doped optical fibers and semiconductor heterostructures, we revisit the theory of the propagation of a pulse-modulated light in a saturable absorber. Explicit analytical expressions of the transmitted pulse are obtained, enabling us to determine the parameters optimizing the time-delay of the transmitted pulse with respect to the incident pulse. We finally compare the maximum fractional delay or figure of merit so attainable to those which have been actually demonstrated in the experiments.
Οι Πυθαγόρειοι και η επίδρασή τους στον Πλάτωνα
Creators: name: Κάντα, Πολυξένη Χαράλαμπου
Publisher: name: Aristotle University of Thessaloniki
Year: 2012
Subjects: Πυθαγόρειοι
Πλάτωνας
Ψυχή
Pythagoreans
Plato
Soul

description: Σκοπός της διατριβής ήταν να διαπιστώσει αν οι Πυθαγόρειοι φιλόσοφοι άσκησαν επίδραση στη διαμόρφωση της πλατωνικής φιλοσοφικής σκέψης. Αρχικά περιγράφεται η ζωή του Πυθαγόρα, η σχολή του και η φιλοσοφία του. Ακόμη, επιχείρησα να συγκρίνω τους Ορφικούς με τους Πυθαγόρειους καθώς και να εξετάσω τις φιλοσοφικές απόψεις του Σωκράτη. Στη συνέχεια αναπτύσσω τις απόψεις του Πλάτωνα για τις Ιδέες, τους αριθμούς και τη φύση της ψυχής. Παράλληλα γίνεται σύγκριση των απόψεων του Πλάτωνα με τις αντίστοιχες Πυθαγόρειες.
description: The aim of the present thesis was to find out the effect of Pythagoreans on Plato and which was the result of this affection. At the beginning there is a description of Pythagoreans life, the external history of his school and I outline the Pythagorean philosophy. Moreover, I tried to made a comparison between Orphics and Pythagoreans and also an account of Socrate’s philosophical views. Furthermore, I put under consideration Plato’s theory of forms, number and the nature of soul. At the same time, there is a comparison between Plato’s theories with the respective views taken by Pythagoreans.
Chinese Notions of Public Space
Creators: name: Sun, Wenwen
Publisher: name: A+BE | Architecture and the Built Environment
Year: 2022

description: This thesis investigates the understanding and implementation of public space in the reformed Chinese context, particularly from the perspectives of urban design and architecture, by referring to the complex process and result of transculturation (transculturación). It delineates how public space as a Greco-Roman originated concept traversed the urban and architectural cultures of post-reform China, merging and negotiating with the local conditions, and evolved into a new phenomenon in Chinese urban design and architecture. By analysing public space as a cultural phenomenon, carrying specific meaning, through specific concepts and designs, this doctoral research develops an interpretative framework within which the meanings and transculturation of public space in Chinese urban design and architecture can be understood and elucidates potential for future urban design and architectural practices. Theoretically, it moves beyond the conventional research on public space that is primarily based on Western thoughts, an Indo-European notion, and a Greco-Roman tradition. Practically, it paves the way for future development of the design of public space, highlighting the cultural, social, and spatial dynamics in Chinese cities vis-à-vis the related political, economic, and governmental conditions within the context of ongoing globalisation.
description: A+BE | Architecture and the Built Environment, No. 19 (2022): Chinese Notions of Public Space
Evidence of Three Mechanisms Explaining the Radius Anomaly of Hot Jupiters
Creators: name: Sarkis, Paula
name: Mordasini, Christoph
name: Henning, Thomas
name: Marleau, Gabriel D.
name: Mollière, Paul
Publisher: name: arXiv
Year: 2020
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: The radii of hot Jupiters are still not fully understood and all of the proposed explanations are based on the idea that these close-in giant planets possess hot interiors. We approach the radius anomaly problem by adopting a statistical approach. We infer the internal luminosity for the sample of hot Jupiters, study its effect on the interior structure, and put constraints on which mechanism is the dominant one. We develop a flexible and robust hierarchical Bayesian model that couples the interior structure of exoplanets to their observed properties. We apply the model to 314 hot Jupiters and infer the internal luminosity distribution for each planet and study at the population level ({\it i}) the mass-luminosity-radius distribution and as a function of equilibrium temperature the distributions of the ({\it ii}) heating efficiency, ({\it iii}) internal temperature, and the ({\it iv}) pressure of the radiative-convective-boundary (RCB). We find that hot Jupiters tend to have high internal luminosity leading to hot interiors. This has important consequences on the cooling rate and we find that the RCB is located at low pressures. Assuming that the ultimate source of the extra heating is the irradiation from the host star, we illustrate that the heating efficiency follows a Gaussian distribution, in agreement with previous results. We discuss our findings in the context of the proposed heating mechanisms and illustrate that ohmic dissipation, advection of potential temperature, and thermal tides are in agreement with certain trends inferred from our analysis and thus all three models can explain aspects of the observations. We provide new insights on the interior structure of hot Jupiters and show that with our current knowledge it is still challenging to firmly identify the universal mechanism driving the inflated radii.
description: 27 pages and 12 figures. Accepted in A&A. Source code can be found at https://github.com/psarkis/bloatedHJs and data at https://www.space.unibe.ch/research/research_groups/planets_in_time/numerical_data/index_eng.html
Creating knowledge in a small business: a qualitative case study
Creators: name: Allan, Suzanne Christine
Publisher: name: University of British Columbia
Year: 2009

description: This study investigates how knowledge is created in a small business organization. Knowledge creation refers to organizational learning which results in innovation. The research design was a qualitative, single site case study of three firms in the point of sale industry. Data collection took place during a six month field study and employed multiple methods including participant observations, interviews, document reviews, and field journal entries. The study was informed by a conceptual framework which focused on the importance of both tacit and explicit knowledge forms, multiple modes of knowledge conversion (socialization, externalization, combination, internalization), and a knowledge spiraling process. Six themes emerged from the data. The first theme, "the people are the business" indicated that individuals become a knowledge creating structure that transcends office boundaries. A second theme, "we just spend tons of time talking", emphasized the importance of dialogue and informal communication structures to the sharing of tacit knowledge. A third theme, "there hasn't been a new idea in a million years", illustrated the predominance of incremental rather than radical innovation, the strategy of mimicking concept successes, and the importance of learning with other organizations through strategic alliances. A fourth theme, "you learn from your mistakes", represented the experiential nature of learning within the firm. A fifth theme, "it's one of those crystal ball kind of things" depicted the intuitive nature of personal knowledge and its limitations. Finally, the sixth theme, "a day late and a dollar short" explored how time and money pressures both enhance and hinder knowledge creation within a small business context. By comparing the themes to the conceptual framework the study concluded that small business organizations create knowledge in accordance with the nature of interpersonal interactions as they occur in context. The theoretical knowledge spiral was reconceptualized as a web structure in order to accommodate more diversity of approaches to knowledge creation and the complex nature of innovations.
A new mechanism of neutrino mass generation in the NMSSM with broken lepton number
Creators: name: Abada, Asmaa
name: Bhattacharyya, Gautam
name: Moreau, Gregory
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In the Minimal Supersymmetric Standard Model with bilinear R-parity violation, only one neutrino eigenstate acquires a mass at tree level, consequently experimental data on neutrinos cannot be accommodated at tree level. We show that in the Next-to-Minimal extension, where a gauge singlet superfield is added to primarily address the so-called $μ$-problem, it is possible to generate two massive neutrino states at tree level. Hence, the global three-flavour neutrino data can be reproduced at tree level, without appealing to loop dynamics which is vulnerable to model-dependent uncertainties. We give analytical expressions for the neutrino mass eigenvalues and present examples of realistic parameter choices.
description: 9 pages, 2 figures; further clarifications added, to appear in PLB
Efficient Automatic CASH via Rising Bandits
Creators: name: Li, Yang
name: Jiang, Jiawei
name: Gao, Jinyang
name: Shao, Yingxia
name: Zhang, Ce
name: Cui, Bin
Publisher: name: arXiv
Year: 2020
Subjects: subject: Machine Learning (cs.LG)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences

description: The Combined Algorithm Selection and Hyperparameter optimization (CASH) is one of the most fundamental problems in Automatic Machine Learning (AutoML). The existing Bayesian optimization (BO) based solutions turn the CASH problem into a Hyperparameter Optimization (HPO) problem by combining the hyperparameters of all machine learning (ML) algorithms, and use BO methods to solve it. As a result, these methods suffer from the low-efficiency problem due to the huge hyperparameter space in CASH. To alleviate this issue, we propose the alternating optimization framework, where the HPO problem for each ML algorithm and the algorithm selection problem are optimized alternately. In this framework, the BO methods are used to solve the HPO problem for each ML algorithm separately, incorporating a much smaller hyperparameter space for BO methods. Furthermore, we introduce Rising Bandits, a CASH-oriented Multi-Armed Bandits (MAB) variant, to model the algorithm selection in CASH. This framework can take the advantages of both BO in solving the HPO problem with a relatively small hyperparameter space and the MABs in accelerating the algorithm selection. Moreover, we further develop an efficient online algorithm to solve the Rising Bandits with provably theoretical guarantees. The extensive experiments on 30 OpenML datasets demonstrate the superiority of the proposed approach over the competitive baselines.
A SIR epidemic model for citation dynamics
Creators: name: Reia, Sandro M.
name: Fontanari, José F.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Digital Libraries (cs.DL)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: The study of citations in the scientific literature crosses the boundaries between the traditional branches of science and stands on its own as a most profitable research field dubbed the `science of science'. Although the understanding of the citation histories of individual papers involves many intangible factors, the basic assumption that citations beget citations can explain most features of the empirical citation patterns. Here we use the SIR epidemic model as a mechanistic model for the citation dynamics of well-cited papers published in selected journals of the American Physical Society. The estimated epidemiological parameters offer insight on unknown quantities as the size of the community that could cite a paper and its ultimate impact on that community. We find a good, though imperfect, agreement between the rank of the journals obtained using the epidemiological parameters and the impact factor rank.
Hierarchical Quark and Lepton Masses with Sequential U(1) Gauge Symmetry
Creators: name: Ma, Ernest
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Instead of right-handed neutrino singlets, the standard model is extended to include lepton triplets $(Σ^+, Σ^0, Σ^-)$. Each quark and lepton family may now transform under an anomaly-free $U(1)_X$ gauge symmetry, known already for many years. A new sequential application is presented, using just the one Higgs doublet of the standard model, together with two $U(1)_X$ Higgs singlets. The resulting structure has hierarchical quark and lepton masses, as well as a viable seesaw neutrino mass matrix.
description: 8 pages, 1 figure
PAH chemistry and IR emission from circumstellar disks
Creators: name: Visser, R.
name: Geers, V. C.
name: Dullemond, C. P.
name: Augereau, J. -C.
name: Pontoppidan, K. M.
name: van Dishoeck, E. F.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Aims. The chemistry of, and infrared (IR) emission from, polycyclic aromatic hydrocarbons (PAHs) in disks around Herbig Ae/Be and T Tauri stars are investigated. The equilibrium distribution of the PAHs over all accessible charge/hydrogenation states depends on the size and shape of the PAHs and on the physical properties of the star and surrounding disk. Methods. A chemistry model is created to calculate this equilibrium distribution. Destruction of PAHs by ultraviolet (UV) photons, possibly in multi-photon absorption events, is taken into account. The chemistry model is coupled to a radiative transfer code to provide the physical parameters and to combine the PAH emission with the spectral energy distribution (SED) from the star+disk system. Results. Normally hydrogenated PAHs in Herbig Ae/Be disks account for most of the observed PAH emission, with neutral and positively ionized species contributing in roughly equal amounts. Close to the midplane, the PAHs are more strongly hydrogenated and negatively ionized, but these species do not contribute to the overall emission because of the low UV/optical flux deep inside the disk. PAHs of 50 carbon atoms are destroyed out to 100 AU in the disk's surface layer, and the resulting spatial extent of the emission does not agree well with observations. Rather, PAHs of about 100 carbon atoms or more are predicted to cause most of the observed emission. The emission is extended on a scale similar to that of the size of the disk. Furthermore, the emission from T Tauri disks is much weaker and concentrated more towards the central star than that from Herbig Ae/Be disks. Positively ionized PAHs are predicted to be largely absent in T Tauri disks because of the weaker radiation field.
description: 13 pages, 8 figures, accepted for publication in A&A
3D-ANAS: 3D Asymmetric Neural Architecture Search for Fast Hyperspectral Image Classification
Creators: name: Zhang, Haokui
name: Gong, Chengrong
name: Bai, Yunpeng
name: Bai, Zongwen
name: Li, Ying
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Hyperspectral images involve abundant spectral and spatial information, playing an irreplaceable role in land-cover classification. Recently, based on deep learning technologies, an increasing number of HSI classification approaches have been proposed, which demonstrate promising performance. However, previous studies suffer from two major drawbacks: 1) the architecture of most deep learning models is manually designed, relies on specialized knowledge, and is relatively tedious. Moreover, in HSI classifications, datasets captured by different sensors have different physical properties. Correspondingly, different models need to be designed for different datasets, which further increases the workload of designing architectures; 2) the mainstream framework is a patch-to-pixel framework. The overlap regions of patches of adjacent pixels are calculated repeatedly, which increases computational cost and time cost. Besides, the classification accuracy is sensitive to the patch size, which is artificially set based on extensive investigation experiments. To overcome the issues mentioned above, we firstly propose a 3D asymmetric neural network search algorithm and leverage it to automatically search for efficient architectures for HSI classifications. By analysing the characteristics of HSIs, we specifically build a 3D asymmetric decomposition search space, where spectral and spatial information are processed with different decomposition convolutions. Furthermore, we propose a new fast classification framework, i,e., pixel-to-pixel classification framework, which has no repetitive operations and reduces the overall cost. Experiments on three public HSI datasets captured by different sensors demonstrate the networks designed by our 3D-ANAS achieve competitive performance compared to several state-of-the-art methods, while having a much faster inference speed.
description: 19 pages, 13 figures
Magneto-resistivity model and ionization energy approximation for ferromagnets
Creators: name: Arulsamy, Andrew Das
name: Cui, Xiangyuan
name: Stampfl, Catherine
name: Ratnavelu, Kurunathan
Publisher: name: arXiv
Year: 2007
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The evolution of resistivity versus temperature ($ρ(T)$) curve for different doping elements, and in the presence of various defects and clustering are explained for both diluted magnetic semiconductors (DMS) and manganites. Here, we provide unambiguous evidence that the concept of ionization energy ($E_I$), which is explicitly associated with the atomic energy levels, can be related quantitatively to transport measurements. The proposed ionization energy model is used to understand how the valence states of ions affect the evolution of $ρ(T)$ curves for different doping elements. We also explain how the $ρ(T)$ curves evolve in the presence of, and in the absence of defects and clustering. The model also complements the results obtained from first-principles calculations.
description: Accepted. See the additional notes in the Appendix
Semi-classical properties of geometric quantization with metaplectic correction
Creators: name: Charles, L.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Symplectic Geometry (math.SG)
subject: FOS: Mathematics
subject: 53D22; 53D50; 53D55; 81S30; 47L80

description: The geometric quantization of a symplectic manifold endowed with a prequantum bundle and a metaplectic structure is defined by means of an integrable complex structure. We prove that its semi-classical limit does not depend on the choice of the complex structure. We show this in two ways. First, by introducing unitary identifications between the quantum spaces associated to the various complex polarizations and second, by defining an asymptotically flat connection in the bundle of quantum spaces over the space of complex structures. Furthermore Berezin-Toeplitz operators are intertwined by these identifications and have principal and subprincipal symbols defined independently of the complex structure. The relation with Schrodinger equation and the group of prequantum bundle automorphisms is considered as well.
description: 31 pages
OpenRiskNet Part I: Development of an open e-infrastructure predictive toxicology and risk assessment
Creators: name: Exner, Thomas
name: Farcal, Lucian
name: Bachler, Daniel
name: Nofisat Oki
name: Gebele, Denis
name: Raza, Atif
name: Kramer, Stefan
name: Floden, Evan
name: Notredam, Cedric
name: Rambla, Jordi
name: Danyel  Jennen
name: Jumamurat  Bayjanov
name: Willighagen, Egon
name: Martens, Marvin
name: Evelo, Chris
name: Lynch, Iseult
name: Gkoutos, George
name: Doganis, Philip
name: Karatzas, Pantelis
name: Haralambos  Sarimveis
name: Jacobs, Marc
name: Spjuth, Ola
name: Dudgeon, Tim
name: Christie, Alan
name: Bois, Frederic
name: Geerke, Daan
name: Jennings, Paul
name: Hardy, Barry
name: OpenRiskNet (EU Within Horizon 2020 EINFRA-22-2016; Project No. 731075)
Publisher: name: F1000 Research Limited
Year: 2019

description: OpenRiskNet (https://openrisknet.org/) is a 3-year project funded by the EU within Horizon 2020 EINFRA-22-2016 Programme, with the main objective to develop an open e-infrastructure providing data and software resources and services to a variety of industries requiring risk assessment (e.g. chemicals, cosmetic ingredients, pharma or nanotechnologies).
The infrastructure is built on virtual research environments (VREs), which can be deployed to workstations as well as public and in-house cloud infrastructures. Services providing data, data analysis, modelling and simulation tools for risk assessment are integrated into the e-infrastructure and can be combined into workflows using harmonised and interoperable application programming interfaces (APIs) (https://openrisknet.org/e-infrastructure/services/). For complete risk assessment and safe-by-design studies, OpenRiskNet e-infrastructure functionality is combined via a variety of incorporated services demonstrated within a set of case studies (see figure 1). The case studies present real-world settings such as data curation, systems biology approaches for grouping compounds, read-across applications using chemical and biological similarity, and identification of areas of concern based only on alternative methods (non-animal testing) approaches.
OpenRiskNet is working with a network of partners, organised within an Associated Partners Programme, aiming to strengthen the working ties to other organisations developing relevant solutions or tools.
title: Demystifying Civic Engagement: How to Make Your Voice Heard (Beyond Voting!) & 5 Tips to Get Started
Creators: name: Morris, Victoria
name: Sabella, Kathryn
Publisher: name: UMass Chan Medical School
Year: 2024

description: The term “civic engagement” is less intimidating than it sounds! Civic engagement describes the process taken by individuals or groups to identify and address issues of concern within their communities. Civic engagement can take many forms, from individual events such as working the polls, to longer-term, sustained efforts such as joining an advocacy group and educating others around issues that matter to you. This tip sheet outlines 5 ways to get involved in civic engagement that are in addition to voting OR that can be done before you’re old enough to vote.
Highly Relativistic Motions of Spinning Particles According to Mathisson Equations
Creators: name: Plyatsko, Roman
Publisher: name: arXiv
Year: 2008
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The physical effects following from the Mathisson equations at the highly relativistic motions of a spinning test particle relative to a Schwarzschild mass are discussed. The corresponding numerical estimates are presented.
description: 6 pages, invited paper presented at the Mathisson Conference (17-20 October2007, Warsaw), to appear in Acta Phys. Pol. B
Fading channel estimation for free-space continuous-variable secure quantum communication
Creators: name: Ruppert, László
name: Peuntinger, Christian
name: Heim, Bettina
name: Günthner, Kevin
name: Usenko, Vladyslav C.
name: Elser, Dominique
name: Leuchs, Gerd
name: Filip, Radim
name: Marquardt, Christoph
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We investigate estimation of fluctuating channels and its effect on security of continuous-variable quantum key distribution. We propose a novel estimation scheme which is based on the clusterization of the estimated transmittance data. We show that uncertainty about whether the transmittance is fixed or not results in a lower key rate. However, if the total number of measurements is large, one can obtain using our method a key rate similar to the non-fluctuating channel even for highly fluctuating channels. We also verify our theoretical assumptions using experimental data from an atmospheric quantum channel. Our method is therefore promising for secure quantum communication over strongly fluctuating turbulent atmospheric channels.
description: 17 pages, 11 figures
Το δικαίωμα ανάληψης συλλογικής δράσης από τις συνδικαλιστικές οργανώσεις των εργαζομένων σε ανταγωνισμό με τις κοινοτικές οικονομικές ελευθερίες (αρ. 43 και 49 ΣΕΚ): οριοθέτηση μέσω του ελέγχου αναλογικότητας στην νομολογία του ΔΕΚ (υποθέσεις Viking και Laval)»
Creators: name: Γκερλιώτη, Αλίκη Δημητρίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2012
Subjects: Αναλογικότητα
Απεργία
Κοινοτικό δίκαιο
Proportionality
Strike
Community law

description: Το δικαίωμα ανάληψης συλλογικής δράσης από τις συνδικαλιστικές οργανώσεις των εργαζομένων αποτελεί αναγνωρισμένο από το ΔΕΚ μέρος της κοινοτικής έννομης τάξης. Η παρούσα εργασία εξετάζει τις περιπτώσεις σύγκρουσης του εν λόγω δικαιώματος με τις θεμελιώδεις κοινοτικές οικονομικές ελευθερίες. Συγκεκριμένα, με βάση τις υποθέσεις Viking και Laval, επιχειρείται μια συστηματική παρουσίαση της μεθόδου εναρμόνισης των συγκρουόμενων συμφερόντων. Το δικαίωμα συλλογικής δράσης, μέσα από τον έλεγχο αναλογικότητας του ΔΕΚ, χρησιμοποιείται ως δικαιολογητική βάση περιορισμών στις ελευθερίες των αρ 43 και 49 ΣΕΚ, ενώ σκιαγραφούνται τα όρια και οι νόμιμοι επιδιωκόμενοι σκοποί της δράσης. Μέσα από έναν αυστηρό έλεγχο αναλογικότητας, το ΔΕΚ καταλήγει να δημιουργεί μια ιεράρχηση υπέρ των ελευθεριών, η οποία απορρυθμίζει τα δικαιώματα συλλογικού αγώνα και οδηγεί σε μια ασύμμετρη θεσμική ευρωπαϊκή ολοκλήρωση, όπου το οικονομικό σκέλος προπορεύεται του κοινωνικού.
description: The ECJ recognised the right of trade unions to take collective action as a fundamental right in the Community legal order. The paper analyses the collision of this fundamental right with the fundamental freedoms of the EC Treaty, in Cases Viking and Laval and offers a systematic presentation of the harmonisation method used by the ECJ. It is indicated that the right to collective actions forms a justification ground to a restriction of the free movement provisions (art. 43 and 49 EC), while the ECJ sets the limits and the legitimate aims of a collective action. By the implementation of a strict proportionality test, the ECJ creates a hierarchy between fundamental rights and freedoms, which leads to a constitutional asymmetry in the European integration and raises questions concerning the future of the national collective labour law models.
The impact of specialized accreditation on Canadian dental hygiene diploma progams
Creators: name: Sunell, Susanne
Publisher: name: University of British Columbia
Year: 2009

description: The competition for scare resources in higher education has increased the pressure on administrators and educators to evaluate educational programs, and to demonstrate quality outcomes. Accreditation has been suggested as a useful tool for looking at accountability, but little research has been conducted to explore this issue, particularly in program accreditation. Little evidence exists to support the assumption that program accreditation adds value to the educational environment. This study explored the perceptions of program directors and administrators regarding the impact of accreditation on the quality of Canadian dental hygiene diploma programs. A 63% response rate was received from the 54 individuals surveyed, representing an 85% institutional response rate from the 27 accredited programs. Of these respondents, 21 individuals also participated in a semi-structured interview. Descriptive and inferential statistics including t-tests and ANOVAs were calculated for the usefulness of accreditation, the importance of accreditation requirements, and the value of accreditation phases. Accreditation as a stimulus for improvement was rated as extremely useful by 41% and very useful by 41%. As a tool for self-evaluation it was rated as extremely useful by 24% and very useful by 56%. While all the standards were rated as important, the following received the highest ratings: Clinical Outcomes Review Evaluation {extremely important 38%, and very important 35%), curriculum {extremely important 44% and very important 44%), preparation for clinical practice {extremely important 40% and very important 47%), and faculty and faculty development (extremely important 38% and very important 50%). While the site-visit and the report were valued, the self-study phase received the highest ratings in promoting program quality (great value 41% and much value 41%). The accreditation process appears to be the most important factor in understanding the relationship between accreditation and program quality. The process provides the catalyst for transforming accreditation standards into quality elements within programs. While accreditation influences program quality, educational institutions mainly seek accreditation to facilitate licensure and portability of graduates. If the link between licensure and accreditation decreases, the support of the educational institutions may wane.
Presentaciones del curso de políticas de comunicación en la era digital
Creators: name: Suing, Abel
Publisher: name: Zenodo
Year: 2021
Subjects: Comunicación
política
regulación
derecho
libertad
expresión
información

description: Presentaciones del curso de políticas de comunicación, en la maestría en comunicación mención investigación y cultura digital, periodo octubre / 20 - febrero / 21, de la Universidad Técnica Particular de Loja, Ecuador.
Breaking Adiabatic Quantum Control with Deep Learning
Creators: name: Ding, Yongcheng
name: Ban, Yue
name: Martín-Guerrero, José D.
name: Solano, Enrique
name: Casanova, Jorge
name: Chen, Xi
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In the era of digital quantum computing, optimal digitized pulses are requisite for efficient quantum control. This goal is translated into dynamic programming, in which a deep reinforcement learning (DRL) agent is gifted. As a reference, shortcuts to adiabaticity (STA) provide analytical approaches to adiabatic speed up by pulse control. Here, we select single-component control of qubits, resembling the ubiquitous two-level Landau-Zener problem for gate operation. We aim at obtaining fast and robust digital pulses by combining STA and DRL algorithm. In particular, we find that DRL leads to robust digital quantum control with operation time bounded by quantum speed limits dictated by STA. In addition, we demonstrate that robustness against systematic errors can be achieved by DRL without any input from STA. Our results introduce a general framework of digital quantum control, leading to a promising enhancement in quantum information processing.
description: 6 pages, 3 figures plus Supplemental Materials
Dirac fermions in de Sitter and anti-de Sitter backgrounds
Creators: name: Cotăescu, Ion I
Publisher: name: arXiv
Year: 2007
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Starting with a new theory of symmetries generated by isometries in field theories with spin, one finds the generators of the spinor representation in backgrounds with a given symmetry. In this manner one obtains a collection of conserved operators from which one can chose the complete sets of commuting operators defining quantum modes. In this framework, the quantum modes of the free Dirac field on de Sitter or anti-de Sitter spacetimes can be completely derived in static or moving charts. One presents the discrete quantum modes, in the central static charts of the anti-de Sitter spacetime, whose eigenspinors can be normalized. The consequence is that the second quantization can be done in this case in canonical manner. For the free Dirac field on de Sitter manifolds this can not be done in static charts being forced to consider the moving ones. The quantum modes of the free Dirac field in these charts are used for writing down the quantum Dirac field and its one-particle operators.
description: 59 pages
Διαμόρφωση διαδικασίας αξιολόγησης ισόπεδων κόμβων τύπου Τ:
Creators: name: Τζοβάρας, Μιχαήλ Βλαδίμηρου
Publisher: name: Aristotle University of Thessaloniki
Year: 2012
Subjects: Κόμβος
Αξιολόγηση
Intersection
Check process

description: Το θέμα της εργασίας είναι η δημιουργία μιας διαδικασίας ελέγχου ισόπεδων διασταυρώσεων τύπου Τ. Στην αρχή της εργασίας, εξετάστηκαν τα γερμανικά πρότυπα σχεδιασμού για ισόπεδους κόμβους RAS-K-1 προκειμένου να βρεθούν όλες οι παράμετροι που περιγράφουν αυτές τις διασταυρώσεις. Ο λόγος για τον οποίο χρησιμοποιούνται οι RAS-K-1 σε αυτή την εργασία, είναι επειδή δεν υπάρχουν ελληνικές προδιαγραφές για το σκοπό αυτό, αλλά από την άλλη τα γερμανικά πρότυπα είναι πιο κοντά στην ελληνική πραγματικότητα. Στη συνέχεια με τη βοήθεια όλων αυτών των παραμέτρων, δημιουργήθηκαν τα κριτήρια για τη διαδικασία ελέγχου. Επίσης, έγινε μια προσπάθεια για τη βαθμονόμηση αυτών των κριτηρίων, ανάλογα με τη σημασία τους, έτσι ώστε μετά την αξιολόγηση ο κόμβος να έχει μια βαθμολογία στην κλίμακα 0-100. Τέλος, επιλέχθηκαν 2 κόμβοι στην περιοχή της Πέλλας για να αξιολογηθούν με τη βοήθεια της ανωτέρω διαδικασίας ελέγχου. Στο τελευταίο κεφάλαιο της εργασίας αυτής, παρουσιάζονται τα συμπεράσματα από την αξιολόγηση των διασταυρώσεις αυτών καθώς και οι προτάσεις για την βελτίωσή τους.
description: The theme of this project is the creation of a check process in the 3 - way intersection’s design (T junction). In the beginning of the project, were investigated the German design standards for intersections in the same level (RAS-K-1) to find all the parameters that describe these intersections. The reason why (RAS-K-1) used in this project, is because there are no Greek standards for this purpose and also the German standards are closer to the Greek state. Afterwards using all these parameters, were created the criteria for the check process. Also was made an attempt to calibrate these criteria depending on their importance, so after the appliance of the above check up the intersection will have a marking from 0 to 100. Finally, were selected 2 intersections in the region of Pella to be checked up with the help of the above check process. In the last chapter of this project, are presented the conclusions from the intersections check up. Also in the same chapter some suggestions for improvement are presented too.
Phenomenological Implications of a Class of Neutrino Mass Matrices
Creators: name: Dev, S.
name: Kumar, Sanjeev
name: Verma, Surender
name: Gupta, Shivani
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The generic predictions of two-texture zero neutrino mass matrices of class A in the flavor basis have been reexamined especially in relation to the degeneracy between mass matrices of types A_1 and A_2 and interesting constraints on the neutrino parameters have been obtained. It is shown that the octant of $θ_{23}$ and the quadrant of the Dirac-type CP-violating phase $δ$ can be used to lift this degeneracy.
description: 16 pages, 4 figures, final version with minor changes to appear in Nucl. Phys. B
Learning Structured Declarative Rule Sets -- A Challenge for Deep Discrete Learning
Creators: name: Fürnkranz, Johannes
name: Hüllermeier, Eyke
name: Mencía, Eneldo Loza
name: Rapp, Michael
Publisher: name: arXiv
Year: 2020
Subjects: subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Arguably the key reason for the success of deep neural networks is their ability to autonomously form non-linear combinations of the input features, which can be used in subsequent layers of the network. The analogon to this capability in inductive rule learning is to learn a structured rule base, where the inputs are combined to learn new auxiliary concepts, which can then be used as inputs by subsequent rules. Yet, research on rule learning algorithms that have such capabilities is still in their infancy, which is - we would argue - one of the key impediments to substantial progress in this field. In this position paper, we want to draw attention to this unsolved problem, with a particular focus on previous work in predicate invention and multi-label rule learning
Theory of Four-dimensional Fractional Quantum Hall States
Creators: name: Chern, Chyh-Hong
Publisher: name: arXiv
Year: 2006
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We propose a pseudo-potential Hamiltonian for the Zhang-Hu's generalized fractional quantum Hall states to be the exact and unique ground states. Analogously to Laughlin's quasi-hole (quasi-particle), the excitations in the generalized fractional quantum Hall states are extended objects. They are vortex-like excitations with fractional charges $+(-)1/m^3$ in the total configuration space CP$^3$. The density correlation function of the Zhang-Hu states indicates that they are incompressible liquid.
description: 4 pages
Analysis, Design and Fabrication of centimeter-wave Dielectric Fresnel Zone Plate Lens and reflector
Creators: name: Mahmoudi, Ali
name: Azalzadeh, Reza
Publisher: name: arXiv
Year: 2007
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Fresnel lens has a long history in optics. This concept at non-optical wavelengths is also applicable. In this paper we report design and fabrication of a half and quarter wave dielectric Fresnel lens made of Plexiglas, and a Fresnel reflector at 11.1 GHz frequency. We made two lenses and one reflector at same frequency and compare their gain and radiation pattern to simulated results. Some methods for better focusing action will be introduced.
The Use of Domination Number of a Random Proximity Catch Digraph for Testing Spatial Patterns of Segregation and Association
Creators: name: Ceyhan, E.
name: Priebe, C. E.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Methodology (stat.ME)
subject: Statistics Theory (math.ST)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: Priebe et al. (2001) introduced the class cover catch digraphs and computed the distribution of the domination number of such digraphs for one dimensional data. In higher dimensions these calculations are extremely difficult due to the geometry of the proximity regions; and only upper-bounds are available. In this article, we introduce a new type of data-random proximity map and the associated (di)graph in $\mathbb R^d$. We find the asymptotic distribution of the domination number and use it for testing spatial point patterns of segregation and association.
description: 13 pages, 7 figures
Upcycling Packaging: EU Research Driving Sustainability - upPE-T project
Creators: name: Monzó, Fuensanta
Publisher: name: Zenodo
Year: 2024

description: At present, more than 98% of plastics are produced from non-renewable sources. Some plastics are biobased, however not all are recyclable, reusable, or biodegradable. Polyethylene (PE) and Polyethylene terephthalate (PET) are the leading plastics used in food packaging. The progressive substitution of consumer products derived from fossil fuels is crucial to decarbonise our society, especially in short shelf life packaging. In 2019, 19% of food & drink packaging plastic post-consumer waste was still sent to landfill and 39.5% was incinerated for energy recovery in Europe. A sustainable management of such plastic waste has become a very challenging problem for the recycling industry globally. Zero landfilling or incineration is needed to achieve the circular economy of plastics. The current alternatives of recycling however have important limitations – (i) mechanical recycling downgrades plastic properties, and (ii) chemical recycling for plastic depolymerisation requires high energy & long reaction times to be effective, consequently only 2% of plastic wastes are chemically recycled. upPE-T will solve these challenges through an innovative solution for the upcycling PE and PET post-consumer packaging wastes by transforming them into a range of biodegradable & recyclable bioplastics (PHBVs) for food & drink packaging manufacturing. The upPE-T project, a Research and Innovation Action (RIA), has received a grant of 7.826.685 € from the European Commission for the Topic ID: CE-BIOTEC-09-2020.
Meta Learning-based MIMO Detectors: Design, Simulation, and Experimental Test
Creators: name: Zhang, Jing
name: He, Yunfeng
name: Li, Yu-Wen
name: Wen, Chao-Kai
name: Jin, Shi
Publisher: name: arXiv
Year: 2020
Subjects: subject: Signal Processing (eess.SP)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Deep neural networks (NNs) have exhibited considerable potential for efficiently balancing the performance and complexity of multiple-input and multiple-output (MIMO) detectors. We propose a receiver framework that enables efficient online training by leveraging the following simple observation: although NN parameters should adapt to channels, not all of them are channel-sensitive. In particular, we use a deep unfolded NN structure that represents iterative algorithms in signal detection and channel decoding modules as multi layer deep feed forward networks. An expectation propagation (EP) module, called EPNet, is established for signal detection by unfolding the EP algorithm and rendering the damping factors trainable. An unfolded turbo decoding module, called TurboNet, is used for channel decoding. This component decodes the turbo code, where trainable NN units are integrated into the traditional max-log-maximum a posteriori decoding procedure. We demonstrate that TurboNet is robust for channels and requires only one off-line training. Therefore, only a few damping factors in EPNet must be re-optimized online. An online training mechanism based on meta learning is then developed. Here, the optimizer, which is implemented by long short-term memory NNs, is trained to update damping factors efficiently by using a small training set such that they can quickly adapt to new environments. Simulation results indicate that the proposed receiver significantly outperforms traditional receivers and that the online learning mechanism can quickly adapt to new environments. Furthermore, an over-the-air platform is presented to demonstrate the significant robustness of the proposed receiver in practical deployment.
description: 32 pages, 11 figures, 8 tables
Further Comments on the Symmetric Subtraction of the Nonlinear Sigma Model
Creators: name: Bettinelli, Daniele
name: Ferrari, Ruggero
name: Quadri, Andrea
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Recently a perturbative theory has been constructed, starting from the Feynman rules of the nonlinear sigma model at the tree level in the presence of an external vector source coupled to the flat connection and of a scalar source coupled to the nonlinear sigma model constraint (flat connection formalism). The construction is based on a local functional equation, which overcomes the problems due to the presence (already at one loop) of non chiral symmetric divergences. The subtraction procedure of the divergences in the loop expansion is performed by means of minimal subtraction of properly normalized amplitudes in dimensional regularization. In this paper we complete the study of this subtraction procedure by giving the formal proof that it is symmetric to all orders in the loopwise expansion. We provide further arguments on the issue that, within our subtraction strategy, only two parameters can be consistently used as physical constants.
description: 26 pages, minor changes, to appear in Int. J. Mod. Phys. A