cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Study of a nonhomogeneous aerogel radiator in a proximity focusing RICH detector
Creators: name: Krizan, Peter
name: Korpar, Samo
name: Iijima, Toru
Publisher: name: arXiv
Year: 2006
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: The use of a nonhomogeneous aerogel radiator, i.e. one consisting of layers with different refractive indices, has been shown to improve the resolution of the Cherenkov angle measured with a proximity focusing RICH detector. In order to obtain further information on the performance of such a detector, a simple model has been used to calculate the resolution and search for optimal radiator parameters.
description: Submitted to Nucl. Instr. Meth
Free-space quantum key distribution with entangled photons
Creators: name: Marcikic, Ivan
name: Lamas-Linares, Antia
name: Kurtsiefer, Christian
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We report on a complete experimental implementation of a quantum key distribution protocol through a free space link using polarization-entangled photon pairs from a compact parametric down-conversion source. Over 10 hours of uninterrupted communication between sites 1.5 km apart, we observe average key generation rates of 630 per second after error correction and privacy amplification. Our scheme requires no specific hardware channel for synchronization apart from a classical wireless link, and no explicit random number generator.
description: 3 pages, 2 figures, reviewed version, accepted in Applied Physics Letters
Melting and freezing of argon in a granular packing of linear mesopore arrays
Creators: name: Schaefer, Christof
name: Hofmann, Tommy
name: Wallacher, Dirk
name: Huber, Patrick
name: Knorr, Klaus
Publisher: name: arXiv
Year: 2008
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Atomic and Molecular Clusters (physics.atm-clus)
subject: FOS: Physical sciences

description: Freezing and melting of Ar condensed in a granular packing of template-grown arrays of linear mesopores (SBA-15, mean pore diameter 8 nanometer) has been studied by specific heat measurements C as a function of fractional filling of the pores. While interfacial melting leads to a single melting peak in C, homogeneous and heterogeneous freezing along with a delayering transition for partial fillings of the pores result in a complex freezing mechanism explainable only by a consideration of regular adsorption sites (in the cylindrical mesopores) and irregular adsorption sites (in niches of the rough external surfaces of the grains, and at points of mutual contact of the powder grains). The tensile pressure release upon reaching bulk liquid/vapor coexistence quantitatively accounts for an upward shift of the melting/freeezing temperature observed while overfilling the mesopores.
description: 4 pages, 4 figures, to appear as a Letter in Physical Review Letters
Γονεϊκή συμπεριφορά και σχολική επίδοση
Creators: name: Γεωργίου, Στέλιος Ν.
Publisher: name: Παιδαγωγική Επιθεώρηση
Year: 1996

description: The purpose of this study was to compare the parental behavior of high and low school achievers. Forty two adolescents {males and females) and their parents reported retrospectively critical incidents that described what the parents did intentionally in order to influence their children's school achievement. The incidents were analyzed into activities and these in turn were classified on the basis of a given typology. The results showed that the families of high and low achievers differed in several aspects of the everyday parental behavior that is typically exhibited in them. Parents of high achievers tended to allow responsibility on the part of the child, to emphasize dialogue, to show interest about schooling to set high expectations for the future and to provide emotional support. In contrast, parents of low achievers tended to use significantly more activities that could be classified under the following categories: Sets limits/closes options; criticises/doubts; and threatens/punishes. Generally, the behavior of the first category of parents could be characterized as inclusive and cooperative, where as the behavior of the second category of parents could be characterized as authoritative.
description: Παιδαγωγική Επιθεώρηση, Vol. 23 (1996)
The Effect of Star Formation on the Far-Infrared--Radio Correlation within Galaxies
Creators: name: Murphy, E. J.
name: Helou, G.
name: Braun, R.
name: Kenney, J. D. P.
name: Armus, L.
name: Calzetti, D.
name: Draine, B. T.
name: Kennicutt,, R. C.
name: Roussel, H.
name: Walter, F.
name: Bendo, G. J.
name: Buckalew, B.
name: Dale, D. A.
name: Engelbracht, C. W.
name: Smith, J. D. T.
name: Thornley, M. D.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Using data obtained for twelve galaxies as part of the {\it Spitzer} Infrared Nearby Galaxies Survey (SINGS) and the Westerbork Synthesis Radio Telescope (WSRT)-SINGS radio continuum survey, we study how star formation activity affects the far-infrared (FIR)--radio correlation {\it within} galaxies by testing a phenomenological model, which describes the radio image as a smeared version of the FIR image. The physical basis of this description is that cosmic-ray (CR) electrons will diffuse measurably farther than the mean free path of dust-heating photons before decaying by synchrotron radiation. This description works well in general. Galaxies with higher infrared surface brightnesses have best-fit smoothing scale-lengths of a few hundred parsecs, substantially shorter than those for lower surface brightness galaxies. We interpret this result to suggest that galaxies with higher disk averaged star formation rates have had a recent episode of enhanced star formation and are characterized by a higher fraction of young CR electrons that have traveled only a few hundred parsecs from their acceleration sites in supernova remnants compared to galaxies with lower star formation activity.
description: 5 pages, 3 figures; Accepted for publication in ApJ Letters
Matrix Elements of SU(6) Generators for Baryons at Arbitrary $N_c$
Creators: name: Matagne, N.
name: Stancu, Fl.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We present explicit formulas for the matrix elements of the SU(6) generators for totally symmetric spin-flavor states, relevant for baryon spectroscopy in large $N_c$ QCD. We rely on the interplay between two different methods to calculate these matrix elements. As an outcome, general analytic formulas of the corresponding SU(6) isoscalar factors are derived for arbitrary $N_c$. These results can be used to study excited states of nonstrange and strange baryons.
description: 20 pages, 1 table, RevTeX4, version accepted for publication in Phys. Rev. D
Fabrication and characterisation of ridge waveguide InGaAs quantum well lasers
Creators: name: Yarker, David Richard.
Publisher: name: University of British Columbia
Year: 2009

description: We have fabricated separate confinement heterostructure, graded index, indium gallium arsenide (InGaAs), strained layer, quantum well, ridge waveguide lasers. This thesis describes both the fabrication procedure we have used and the results of our characterisation of these devices. Our fabrication procedures differs from other common procedures in that we have used carbon for the p-type dopant and e-beam lithography to define the ridges. Carbon doping has been selected rather than beryllium because carbon does not diffuse rapidly in GaAs during the growth of the laser. Electron beam lithography has several advantages over conventional lithography including finer line widths and greater flexibility in pattern definition and pattern layout. We have demonstrated that ridge waveguides can be defined by electron beam lithography, and we have obtained good ridge profiles, etch resistance and write times. Characterisation of these devices used both electrical and optical techniques. DC and pulsed current-voltage characteristics have been measured for devices for different substrates. Substrate materials included two samples with doping pulled away from the quantum well, one doped with beryllium and the other with carbon, and one sample with the doping close to the quantum well doped with carbon. Diode ideality factors were determined and correlated to the doping profiles using a novel two diode model for the active region. In this model the active region is modelled as two separate diodes in series, separated by the quantum well, which acts as the source for the minority carriers. The series and shunt resistance were also determined from the current-voltage characteristics. Typical values for series resistance were about 10Ω. Shunt resistances cover a wide range of values from 100 kΩ to greater than 500 MΩ. We have also measured the specific contact resistance of an indium-silver n-type ohmic contact to be no more than 1.9 10⁻⁴ Ωcm2 using a coplanar dot resistance method described in this work. We have also measured the specific contact resistance of a chrome-gold p-type ohmic contact to be (12±5) 10⁻⁵ Ωcm² using a series resistance measurement. Threshold current densities of about 2.0 kA/cm² have been obtained for ridge waveguide lasers about 500 μm long and 3 μm wide on Be doped laser substrates. A similar laser was found to have a carrier lifetime at threshold of 11 ns from turn-on delay measurements. The value of T₀ for a laser 240 μm long and 6 μm wide has been measured to be 88 K below 10°C and 28 K above that temperature. This laser is also shown to lase in the second quantum subband at sufficiently high drive currents. Electroluminescence spectra have also been collected and compared to theoretical calculations.
Dozens of virtual impactor orbits eliminated by the EURONEAR VIMP DECam data mining project
Creators: name: Vaduvescu, O.
name: Curelaru, L.
name: Popescu, M.
name: Danila, B.
name: Ciobanu, D.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Massive data mining of image archives observed with large etendue facilities represents a great opportunity for orbital amelioration of poorly known virtual impactor asteroids (VIs). There are more than 1000 VIs known today; most of them have very short observed arcs and many are considered lost as they became extremely faint soon after discovery. We aim to improve the orbits of VIs and eliminate their status by data mining the existing image archives. Within the European Near Earth Asteroids Research (EURONEAR) project, we developed the Virtual Impactor search using Mega-Precovery (VIMP) software endowed with a very effective (fast and accurate) algorithm to predict apparitions of candidate pairs for subsequent guided human search. Considering a simple geometric model, the VIMP algorithm searches for any possible intersection in space and time between the positional uncertainty of any VI and the bounding sky projection of any image archive. We applied VIMP to mine the data of 451914 Blanco/DECam images observed between 12 Sep 2012 and 11 Jul 2019, identifying 212 VIs that possibly fall into 1286 candidate images leading to either precovery or recovery events. Following a careful search of candidate images, we recovered and measured 54 VIs in 183 DECam images. About 4000 impact orbits were eliminated from both lists, 27 VIs were removed from at least one list, while 14 objects were eliminated from both lists. The faintest detections were around V~24.0, while the majority fall between 21
description: Accepted for publication in Astronomy & Astrophysics (27 July 2020)
Mesoscopic averaging of the two-dimensional KPZ equation
Creators: name: Tao, Ran
Publisher: name: arXiv
Year: 2023
Subjects: subject: Probability (math.PR)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: We study the limit of a local average of the KPZ equation in dimension $d=2$ with general initial data in the subcritical regime. Our result shows that a proper spatial averaging of the KPZ equation converges in distribution to the sum of the solution to a deterministic KPZ equation and a Gaussian random variable that depends solely on the scale of averaging. This shows a unique mesoscopic averaging phenomenon that is only present in dimension two. Our work is inspired by the recent findings by Chatterjee \cite{chatterjee2021weak}.
description: 27 pages, accepted version, fixed typos, added a few references, and improved presentation
Precision Spectroscopy at Heavy Ion Ring Accelerator SIS300
Creators: name: Backe, H.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: Unique spectroscopic possibilities open up if a laser beam interacts with relativistic lithium-like ions stored in the heavy ion ring accelerator SIS300 at the future Facility for Antiproton and Ion Research FAIR in Darmstadt, Germany. At a relativistic factor gamma = 36 the 2P 1/2 level can be excited from the 2S 1/2 ground state for any element with frequency doubled dye-lasers in collinear geometry. Precise transition energy measurements can be performed if the fluorescence photons, boosted in forward direction into the X-ray region, are energetically analyzed with a single crystal monochromator. The hyperfine structure can be investigated at the 2P 1/2 - 2S 1/2 transition for all elements and at the 2P 3/2 - 2S 1/2 transition for elements with Z < 50. Isotope shifts and nuclear moments can be measured with unprecedented precision, in principle even for only a few stored radioactive species with known nuclear spin. A superior relative line width in the order of 5E-7 may be feasible after laser cooling, and even polarized external beams may be prepared by optical pumping.
MultiScale Probability Map guided Index Pooling with Attention-based learning for Road and Building Segmentation
Creators: name: Bose, Shirsha
name: Chowdhury, Ritesh Sur
name: Pal, Debabrata
name: Bose, Shivashish
name: Banerjee, Biplab
name: Chaudhuri, Subhasis
Publisher: name: arXiv
Year: 2023
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: Efficient road and building footprint extraction from satellite images are predominant in many remote sensing applications. However, precise segmentation map extraction is quite challenging due to the diverse building structures camouflaged by trees, similar spectral responses between the roads and buildings, and occlusions by heterogeneous traffic over the roads. Existing convolutional neural network (CNN)-based methods focus on either enriched spatial semantics learning for the building extraction or the fine-grained road topology extraction. The profound semantic information loss due to the traditional pooling mechanisms in CNN generates fragmented and disconnected road maps and poorly segmented boundaries for the densely spaced small buildings in complex surroundings. In this paper, we propose a novel attention-aware segmentation framework, Multi-Scale Supervised Dilated Multiple-Path Attention Network (MSSDMPA-Net), equipped with two new modules Dynamic Attention Map Guided Index Pooling (DAMIP) and Dynamic Attention Map Guided Spatial and Channel Attention (DAMSCA) to precisely extract the building footprints and road maps from remotely sensed images. DAMIP mines the salient features by employing a novel index pooling mechanism to retain important geometric information. On the other hand, DAMSCA simultaneously extracts the multi-scale spatial and spectral features. Besides, using dilated convolution and multi-scale deep supervision in optimizing MSSDMPA-Net helps achieve stellar performance. Experimental results over multiple benchmark building and road extraction datasets, ensures MSSDMPA-Net as the state-of-the-art (SOTA) method for building and road extraction.
Ο ρόλος της αρχής της χρηστής δημοσιονομικής διαχείρισης στον σύγχρονο δημοσιονομικό έλεγχο
Creators: name: Πέττα, Χριστίνα Μάριου
Publisher: name: Aristotle University of Thessaloniki
Year: 2015
Subjects: δημοσιονομικός έλεγχος
έλεγχος απόδοσης
χρηστή δημοσιονομική διαχείριση
financial control
value for money audit
sound financial management

description: Το θέμα που εξετάζεται είναι η έννοια και το περιεχόμενο της αρχής της χρηστής δημοσιονομικής διαχείρισης στο πλαίσιο άσκησης της δημοσιονομικής διαχείρισης και του σύγχρονου δημοσιονομικού ελέγχου. Η εν λόγω αρχή αναλύεται σε τρεις επιμέρους αρχές, την αρχή της οικονομικότητας, την αρχή της αποδοτικότητας και την αρχή της αποτελεσματικότητας, και συνδέεται με την αρχή της διαφάνειας της δημόσιας δράσης και της λογοδοσίας των υπευθύνων για την διαχείριση του δημόσιου χρήματος. Στην εργασία ερευνάται αναλυτικά η προέλευση της αρχής της χρηστής δημοσιονομικής διαχείρισης, η ένταξή της μέσω της πρόσφατης δημοσιονομικής νομοθεσίας στο σύστημα του σύγχρονου δημοσιονομικού ελέγχου στην Ελλάδα και η σύνδεση της με τη νέα δημοσιονομική διακυβέρνηση. Τέλος, γίνεται μια αναφορά και στην καταγραφή της αρχής αυτής στο ευρωπαϊκό ενωσιακό δίκαιο.
description: The issue addressed is the meaning and scope of the principle of sound financial management in the discharge of financial management and modern financial audit. This principle is broken down into three sub-principles, the principle of economy, the principle of efficiency and the principle of effectiveness, and is linked to the principle of transparency of public action and accountability of those responsible for the management of public money. This paper investigated the detailed origin of the principle of sound financial management, the integration through the recent fiscal legislation to the system of modern financial control in Greece and the connection with the new fiscal governance. Finally, there is a mention of the record of this principle in European Union law.
Luminosity Dependent Evolution of Lyman Break Galaxies from redshift 5 to 3
Creators: name: Iwata, I.
name: Ohta, K.
name: Tamura, N.
name: Akiyama, M.
name: Aoki, K.
name: Ando, M.
name: Kiuchi, G.
name: Sawicki, M.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: In this contribution we briefly describe our recent results on the properties of Lyman break galaxies at z~5 obtained from deep and wide blank field surveys using Subaru telescope, and through the comparison with samples at lower redshift ranges we discuss the evolution of star-forming galaxies in the early universe.
description: 2 pages, 1 figure, for the proceedings of the IAU Symposium 235, Galaxies Across the Hubble Time, J. Palous & F. Combes, eds
On Ricci curvature of metric structures on $\mathfrak{g}$-manifolds
Creators: name: Rovenski, Vladimir
name: Wolak, Robert
Publisher: name: arXiv
Year: 2020
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics

description: We study the properties of Ricci curvature of ${\mathfrak{g}}$-manifolds with particular attention paid to higher dimensional abelian Lie algebra case. The relations between Ricci curvature of the manifold and the Ricci curvature of the transverse manifold of the characteristic foliation are investigated. In particular, sufficient conditions are found under which the ${\mathfrak{g}}$-manifold can be a Ricci soliton or a gradient Ricci soliton. Finally, we obtain a amazing (non-existence) higher dimensional generalization of the Boyer-Galicki theorem on Einstein K-manifolds for a special class of abelian ${\mathfrak{g}}$-manifolds.
description: 7 pages
Sources of torsion in Poincare gauge theory
Creators: name: Wheeler, James T.
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We study sources for torsion in Poincare gauge theory of any dimension, signature, and spin. We find that symmetric kinetic terms for non-Yang-Mills bosonic fields of arbitrary rank drive torsion. Our detailed discussion of spin-3/2 Rarita-Schwinger fields shows that they source all independent parts of the torsion. We develop systematic notation for spin-(2k+1)/2 fields and find the spin tensor for arbitrary k in n > 2k dimensions. For k > 0 there is a novel direct coupling between torsion and spinor fields. We also cast the well-known gauge relation between the canonical and Belinfante-Rosenfield energy tensors in terms of different choices of independent variables.
description: 28 pp. Introductory Sections condensed; 2 and 3 dimensional examples added
SQCD: A Geometric Apercu
Creators: name: Gray, James
name: Hanany, Amihay
name: He, Yang-Hui
name: Jejjala, Vishnu
name: Mekareeya, Noppadol
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We take new algebraic and geometric perspectives on the old subject of SQCD. We count chiral gauge invariant operators using generating functions, or Hilbert series, derived from the plethystic programme and the Molien-Weyl formula. Using the character expansion technique, we also see how the global symmetries are encoded in the generating functions. Equipped with these methods and techniques of algorithmic algebraic geometry, we obtain the character expansions for theories with arbitrary numbers of colours and flavours. Moreover, computational algebraic geometry allows us to systematically study the classical vacuum moduli space of SQCD and investigate such structures as its irreducible components, degree and syzygies. We find the vacuum manifolds of SQCD to be affine Calabi-Yau cones over weighted projective varieties.
description: 49 pages, 1 figure
Search for a heavy resonance decaying into a Z+jet final state in p-pbar collisions at sqrt(s) = 1.96 TeV using the D0 detector
Creators: name: D0 Collaboration
name: Abazov, V. M.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We have searched for a heavy resonance decaying into a Z+jet final state in p-pbar collisions at a center of mass energy of 1.96 TeV at the Fermilab Tevatron collider using the D0 detector. No indication for such a resonance was found in a data sample corresponding to an integrated luminosity of 370/pb. We set upper limits on the cross section times branching fraction for heavy resonance production at the 95% C.L. as a function of the resonance mass and width. The limits are interpreted within the framework of a specific model of excited quark production.
description: 8 pages, 5 figures, submitted to Physical Review D
Chaotic dynamics of off-equatorial orbits around pseudo-Newtonian compact objects with dipolar halos
Creators: name: Das, Saikat
name: Roychowdhury, Suparna
Publisher: name: arXiv
Year: 2023
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: In this paper, we implement a generalised pseudo-Newtonian potential to study the off-equatorial orbits inclined at a certain angle with the equatorial plane around Schwarzschild and Kerr-like compact object primaries surrounded by a dipolar halo of matter. The chaotic dynamics of the orbits are detailed for both non-relativistic and special-relativistic test particles. The dependence of the degree of chaos on the Kerr parameter $a$ and the inclination angle $i$ is established individually using widely used indicators, such as the Poincaré Maps and the Maximum Lyapunov Exponents. Although the orbits' chaoticity has a positive correlation with $i$, the growth in the chaotic behaviour is not systematic. There is a threshold value of the inclination angle $i_{\text{c}}$, after which the degree of chaos sharply increases. On the other hand, the chaoticity of the inclined orbits anti-correlates with $a$ throughout its entire range. However, the negative correlation is systematic at lower values of the inclination angle. At higher values of $i$, the degree of chaos increases rapidly below a threshold value of the Kerr parameter, $a_{\text{c}}$. Above this threshold value, the correlation becomes weak. Furthermore, we establish a qualitative correlation between the threshold values and the overall chaoticity of the system. The studies performed with different orbital parameters and several initial conditions reveal the intricate nature of the system.
description: 23 pages, 11 figures. A corrected version of the manuscript. Accepted for publication in Chaos, Solitons & Fractals
The Effect of Spiral Structure on the Measurements of the Oort Constants
Creators: name: Minchev, I.
name: Quillen, A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We perform test-particle simulations in a 2D, differentially rotating stellar disk, subjected to a two-armed steady state spiral density wave perturbation in order to estimate the influence of spiral structure on the local velocity field. By using Levenberg-Marquardt least-squares fit we decompose the local velocity field (as a result of our simulations) into Fourier components to fourth order. Thus we obtain simulated measurements of the Oort constants, A, B, C, and K. We get relations between the Fourier coefficients and some galactic parameters, such as the phase angle of the Solar neighborhood and the spiral pattern speed. We show that systematic errors due to the presence of spiral structure are likely to affect the measurements of the Oort constants. Moderate strength spiral structure causes errors of order 5 km/s/kpc in A and B. We find variations of the Fourier coefficients with velocity dispersion, pattern speed, and sample depth. For a sample at an average heliocentric distance of 0.8 kpc we can summarize our findings as follows:(i) if our location in the Galaxy is near corotation then we expect a vanishing value for C for all phase angles;(ii) for a hot disk, spiral structure induced errors for all Oort constants vanish at, and just inward of the corotation radius; (iii) as one approaches the 4:1 indblad resonances |C| increases and so does its variation with galactic azimuth; (iv) for all simulations |C|, on average, is larger for lower stellar velocity dispersions, contrary to recent measurements.
description: 20p., 11 fig. Replaced with accepted version to be published in MNRAS
The Leave No One Behind Toolkit (CitiObs Deliverable 1.1)
Creators: name: Gold, Margaret
name: Reyes Elzondo, Andrea
name: Spelt, Anouk
Publisher: name: Zenodo
Year: 2024

description: This document describes the Beta version of the CitiObs ‘Leave No One Behind’ (LNOB) Toolkit, which will be tested by the Frontrunner Cases and further co-developed with relevant stakeholders. The LNOB Toolkit seeks to support Citizen Observatories (COs) in the diverse and representative inclusion of participants across dimensions of gender, sociocultural origin, religious affiliation, literacy levels, social status, dis/ability and age.  

The pledge to ”Leave No One Behind” (LNOB) arose in connection with the United Nations Sustainable Development Goals (SDGs) to work towards a world in which all members of society will benefit from the efforts to end poverty and other deprivations, to improve health and education, to reduce inequality, and to spur economic growth, without excluding individuals or groups of people from those benefits.   

A recurrent challenge for Citizen Science projects and initiatives is the lack of diversity amongst participants. The causes for this can relate to limited capacity or reach on the part of project leaders, and a lack of resources on the part of potential participants such as time to participate, or the money to acquire equipment. However, the causes can be much more complex and intersectional with regard to gender, age, socio economic status, literacy levels, religious affiliation, dis/ability, and other factors. The LNOB Toolkit provides advice on how to reflect on this lack of diversity and engage with new groups of people in the activities of the COs, at different stages of the project lifecycle (i.e. before, during and after), with the aim of making participation more equitable, diverse, and inclusive. 

Iterative improvements will be made while this Beta version is tested in practice with the Frontrunner Cases in response to their needs and feedback, and further fine-tuned in collaboration with the Alliance Cases, leading to the final version that will be incorporated into the CitiObs Cookbook for broad use by the Fellow Cases and others.
Η παραβίαση του δικαιώματος ακρόασης ως κώλυμα αναγνώρισης και εκτέλεσης ενδοκοινοτικών αποφάσεων (άρθρ. 34 αρ. 2 του Κανονισμού 44/2001 και 45 παρ. 1 στοιχ. β του Κανονισμού 1215/2012).: Στοιχειοθέτηση του κωλύματος και διαδικασία προβολής του, ιδίως μετά την κατάργηση του exequatur
Creators: name: Βάντη, Μαρούσα Αναστασίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2015
Subjects: Κανονισμός 44/2001
Κανονισμός 1215/2012
Κώλυμα παραβίασης του δικαιώματος ακρόασης
Regulation No 44/2001
Regulation No 1215/2012
Impediment of the violation of the right to be heard

description: Στην μελέτη επιχειρήθηκε αρχικά η ανάλυση των προϋποθέσεων συνδρομής του κωλύματος της παραβίασης του δικαιώματος ακρόασης του εναγομένου, όπως αυτές θεμελιώθηκαν από τη θεωρία και κυρίως από τη νομολογία του ΔΕΕ, τόσο υπό την ισχύ της ΣΒρ, όσο και υπό την ισχύ του Καν 44/2001. Στο δεύτερο μέρος ακολούθησε η αναφορά στον τρόπο και την διαδικασία της προβολής του στα ελληνικά δικαστήρια, όταν αυτά αποτελούν τα δικαστήρια υποδοχής της αλλοδαπής απόφασης, αρχικά σύμφωνα με τον Καν 44/2001 και στη συνέχεια, επιχειρήθηκε μία παρουσίαση του τρόπου με τον οποίο πιθανολογείται ότι θα προβάλλεται από τις 10 Ιανουαρίου 2015, στην Ελλάδα, το κώλυμα της παραβίασης των δικαιωμάτων άμυνας του ερημοδικασθέντος εναγομένου, που προβλέπεται ως λόγος άρνησης αναγνώρισης και εκτέλεσης αλλοδαπής απόφασης στο άρθρο 45 παρ. 1 περ. β σε συνδυασμό με το άρθρο 46 του Καν 1215/2012.
description: The study firstly attempted to analyze the assistance requirements of the impediment of the breach of the defendant's right to be heard, as founded by theory and especially in the case law of the European Union Court, both in the strength of the Brussels Convention and under the effect of Regulation No 44/2001. In the second part we examine the process in which the above impediment can be contested before the Greek courts, when those constitute the courts of recognition of the foreign judgment, initially in accordance with the Regulation No 44/2001 and then we attempt a presentation of the process in which the impediment of the violation of the defendant’s right to be heard, will be contested, from January 10, 2015, in Greece, as a reason for refusing recognition and enforcement of a foreign judgement, according to Article 45 par. 1 case. b in conjunction with Article 46 of Regulation No 1215/2012.
Particle creation in a Robertson-Walker Universe revisited
Creators: name: Pascoal, F.
name: Farina, C.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We reanalyze the problem of particle creation in a 3+1 spatially closed Robertson-Walker space-time. We compute the total number of particles produced by this non-stationary gravitational background as well as the corresponding total energy and find a slight discrepancy between our results and those recently obtained in the literature
Blockchain Privacy Through Merge Avoidance and Mixing Services: a Hardness and an Impossibility Result
Creators: name: Simoes, Jefferson E.
name: Ferreira, Eduardo
name: Menasche, Daniel S.
name: Campos, Carlos A. V.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cryptography and Security (cs.CR)
subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: Cryptocurrencies typically aim at preserving the privacy of their users. Different cryptocurrencies preserve privacy at various levels, some of them requiring users to rely on strategies to raise the privacy level to their needs. Among those strategies, we focus on two of them: merge avoidance and mixing services. Such strategies may be adopted on top of virtually any blockchain-based cryptocurrency. In this paper, we show that whereas optimal merge avoidance leads to an NP-hard optimization problem, incentive-compatible mixing services are subject to a certain class of impossibility results. Together, our results contribute to the body of work on fundamental limits of privacy mechanisms in blockchain-based cryptocurrencies.
Device Image-IV Mapping using Variational Autoencoder for Inverse Design and Forward Prediction
Creators: name: Lu, Thomas
name: Lu, Albert
name: Wong, Hiu Yung
Publisher: name: arXiv
Year: 2023
Subjects: subject: Machine Learning (cs.LG)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: This paper demonstrates the learning of the underlying device physics by mapping device structure images to their corresponding Current-Voltage (IV) characteristics using a novel framework based on variational autoencoders (VAE). Since VAE is used, domain expertise is not required and the framework can be quickly deployed on any new device and measurement. This is expected to be useful in the compact modeling of novel devices when only device cross-sectional images and electrical characteristics are available (e.g. novel emerging memory). Technology Computer-Aided Design (TCAD) generated and hand-drawn Metal-Oxide-Semiconductor (MOS) device images and noisy drain-current-gate-voltage curves (IDVG) are used for the demonstration. The framework is formed by stacking two VAEs (one for image manifold learning and one for IDVG manifold learning) which communicate with each other through the latent variables. Five independent variables with different strengths are used. It is shown that it can perform inverse design (generate a design structure for a given IDVG) and forward prediction (predict IDVG for a given structure image, which can be used for compact modeling if the image is treated as device parameters) successfully. Since manifold learning is used, the machine is shown to be robust against noise in the inputs (i.e. using hand-drawn images and noisy IDVG curves) and not confused by weak and irrelevant independent variables.
description: 5 pages 6 figures
Μια προσπάθεια ταξινόμησης των σχέσεων των συνομηλίκων στην τάξη του νηπιαγωγείου
Creators: name: Αυγητίδου, Σοφία
Publisher: name: Παιδαγωγική Επιθεώρηση
Year: 1996

description: This article introduces a theoretical and research account of the development of peer relationships in the kindergarten classroom. The theoretical approach is concerned with the choice of characteristics for the taxonomy of relationships as presented by other researchers in the field of interpersonal relationships such as equality and reciprocity. The research approach presents a proposed taxonomy of relationships based on ethnographic observations of peer interactions and friendship relations in the natural setting in which they occur (school classroom). Peer relationships are divided in five main types which are characteristic of the qualities and the development of relationships. These types are: a) reciprocal-equal relationships, b) reciprocal-unequal relationships, c) unilateral relationships, d) reciprocal momentary relationships and e) loners. Findings are discussed according to their theoretical and methodological implications.
description: Παιδαγωγική Επιθεώρηση, Vol. 23 (1996)
Scaling and Interference in the Dissociation of Halo Nuclei
Creators: name: Hussein, M. S.
name: Lichtenthäler, R.
name: Nunes, F.
name: Thompson, I. J.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The dissociation of halo nuclei through their collision with light and heavy targets is considered within the Continuum Discretized Coupled Channels theory. We study the one-proton halo nucleus $^8$B and the one-neutron halo nucleus $^{11}$Be, as well as the more normal $^7$Be. The procedure previously employed to extract the Coulomb dissociation cross section by subtracting the nuclear one is critically assessed, and the scaling law usually assumed for the target mass dependence of the nuclear breakup cross section is also tested. It is found that the nuclear breakup cross section for these very loosely bound nuclei does indeed behave as $a+bA^{1/3}$. However, it does not have the geometrically inspired form of a circular ring which seems to be the case for normal nuclei such as $^{7}$Be. We find further that we cannot ignore Coulomb-nuclear interference effects, which may be constructive or destructive in nature, and so the errors in previously extracted B(E1) using the subtraction procedure are almost certainly underestimated.
description: version submitted to PRL + minor text changes
Αξιοποίηση σημασιολογικών επισημάνσεων για ανάκτηση εικόνων με βάση έννοιες
Creators: name: Συμεωνίδης, Σπυρίδων Νικολάου
Publisher: name: Aristotle University of Thessaloniki
Year: 2015
Subjects: Ανάκτηση εικόνων
Μηχανική μάθηση
Ταξινόμηση πολλαπλών ετικετών
Image retrieval
Machine learning
Multi-label classification

description: Στις ημέρες μας, η αναζήτηση εικόνων παρουσιάζει μεγάλο ενδιαφέρον καθώς υπάρχουν αρκετές εφαρμογές, κυρίως διαδικτυακές, που δίνουν αυτήν την υπηρεσία σε εκατομμύρια χρήστες. Επειδή όμως η αποδοτικότητα τέτοιων υπηρεσιών δεν είναι η βέλτιστη δυνατή, αυτός ο κλάδος έχει γίνει ένα ευρύ αντικείμενο έρευνας, πάνω στο οποίο έχουν προταθεί πολλές διαφορετικές προσεγγίσεις. Η διπλωματική αυτή εργασία ασχολείται με το ερευνητικό κομμάτι της ανάκτησης εικόνων με τη βοήθεια πεπερασμένου αριθμού λέξεων κλειδιών-εννοιών (concept-based image retrieval). Τόσο οι εικόνες που χρησιμοποιήθηκαν για την αναζήτηση, όσο και οι επιλεγμένες έννοιες είναι αυτές που χρησιμοποιήθηκαν στους διαγωνισμούς ImageCLEF 2011 και ImageCLEF 2012 , στις εργασίες της επισήμανσης και ανάκτησης φωτογραφιών. Στη δουλειά αυτή εμπλέκεται και ένας άλλος ερευνητικός κλάδος, η αυτόματη επισήμανση εικόνων, η οποία γίνεται με τη βοήθεια μοντέλων μηχανικής μάθησης. Ωστόσο, η διπλωματική αυτή επικεντρώνεται στην έρευνα τεχνικών με τις οποίες αξιοποιούμε αυτές τις επισημάνσεις για να απαντήσουμε ερωτήματα κειμένου με πολλές λέξεις. Στόχος είναι να επιστραφούν οι πιο σχετικές εικόνες με το ερώτημα. Κάναμε μια συγκριτική αξιολόγηση της απόδοσης αρκετών μεθόδων ανάκτησης εικόνων, συμπεριλαμβανομένων μεθόδων που έχουν ήδη εφαρμοστεί στο παρελθόν και κάποιων καινοτόμων μεθόδων που προτείνουμε στα πλαίσια αυτής της εργασίας. Από την πειραματική μελέτη αποδεικνύεται ότι οι προτάσεις μας μπορούν να βελτιώσουν την ακρίβεια ανάκτησης των ήδη δημοσιευμένων στη βιβλιογραφία μεθόδων.
description: Nowadays, image search has attracted a lot of interest because there are many applications, mainly web-based, which provide this service to millions of everyday users. Due to the fact that the performance of such services is not optimal, image retrieval has become a wide research field, where many different approaches have been proposed. This thesis is involved with the research of concept-based image retrieval. We used the image datasets and the sets of concepts which were used in ImageCLEF 2011 and ImageCLEF 2012, in the photo annotation and retrieval tasks. We also dealt with automatic annotation problems which were solved by using machine learning models. Nevertheless, the main scope of this thesis is to investigate techniques that leverage these annotations in order to answer textual queries by returning the most relevant images. We compared the retrieval accuracy of several methods, including methods already published in the bibliography and some novel methods we propose. This comparative study proves that the proposed methods can improve the performance of the already published methods.
Hydrogen Economy has arrived on the Road. It's driving already.  Pioneering long-distance business travel with a hydrogen fuel cell electric vehicle in 2016/2017 in Europe
Creators: name: Braun, Artur
Publisher: name: Zenodo
Year: 2024

description: Alle in dieser Arbeit erwähnten Reisen wurden als persönliche Geschäftsreisen für verschiedene Forschungsprojekte durchgeführt, die vom Schweizerischen Nationalfonds und der Empa finanziert wurden, konkret Korea-Swiss IZKSZ2-162232, Südafrika-Swiss IZLSZ2-149031, NanoTera SHINE 20NA21-145936. Der Autor gibt den Haftungsausschluss ab, dass alle Handelsmarken, die in diesem Manuskript erwähnt werden, nicht als persönliche Befürwortung zu betrachten sind. Vielmehr spiegelt sie die tatsächliche Situation der verfügbaren Ressourcen für die Reise wider
Percolation Model Explaining Both Unipolar Memory and Threshold Resistance Switchings in NiO Film
Creators: name: Chang, S. H.
name: Lee, J. S.
name: Chae, S. C.
name: Lee, S. B.
name: Liu, C.
name: Kahng, B.
name: Kim, D. -W.
name: Noh, T. W.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We observed two types of unipolar resistance switching (RS) in NiO film: memory RS at low temperature and threshold RS at high temperature. We explain these phenomena using a bond percolation model that describes the forming and rupturing of conducting filaments. Assuming Joule heating and thermal dissipation processes in the bonds, we explain how both RS types could occur and be controlled by temperature. We show that these unipolar RS are closely related and can be explained by a simple unified percolation picture.
description: 16 pages, 5 figures
Linear Classifier Combination via Multiple Potential Functions
Creators: name: Trajdos, Pawel
name: Burduk, Robert
Publisher: name: arXiv
Year: 2020
Subjects: subject: Machine Learning (cs.LG)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences

description: A vital aspect of the classification based model construction process is the calibration of the scoring function. One of the weaknesses of the calibration process is that it does not take into account the information about the relative positions of the recognized objects in the feature space. To alleviate this limitation, in this paper, we propose a novel concept of calculating a scoring function based on the distance of the object from the decision boundary and its distance to the class centroid. An important property is that the proposed score function has the same nature for all linear base classifiers, which means that outputs of these classifiers are equally represented and have the same meaning. The proposed approach is compared with other ensemble algorithms and experiments on multiple Keel datasets demonstrate the effectiveness of our method. To discuss the results of our experiments, we use multiple classification performance measures and statistical analysis.
Μια νέα προσέγγιση των μαθησιακών δυσκολιών βασισμένη στη γνωστική κατεύθυνση της ψυχολογίας
Creators: name: Τζουριάδου, Μαρία
Publisher: name: Παιδαγωγική Επιθεώρηση
Year: 1996

description: All attempts to approach the problem of learning difficulties have for a long time failed to interpret the cause of the deficiency and to give an answer to certain bask questions as regards the problem. However, recent developments suggest that one of the approachal attempts that could offer suitable interpretation and answer to the particular and heterogeneous nature of learning difficulties is the cognitive approach to the process of learning. This sort of approach refers to the cognitive abilities and procedures that lead to the acquisition of the ability to learn. The cognitive approach suggests that children with similar problems do not expose any deficiencies as regards their cognitive components, in other words in those structural elements that consist certain abilities or skills. On the contrary, these children manifest difficulties in learning achievements, namely in cognitive skills, which can be explained by their inability to motivate their cognitive strategies. As a result they fail to reach the level of the expert. On the basis of the personality features associated with the rationale of the minimum brain malfunctioning (obsession, distraction, difussion of thougth), such children seem to remain in restricted knowledge. This means that they move from the general to the specific and they keep copying with the various problems in the same right-wrong] way. This deficiency can be accounted by the lack of strategies concerning information elaboration and cognitive elements composition. On the basis of the present theoretical approach various programmes dealing with learning difficulties through learning strategies have developed. Intervention of this kind aims at training children in such a way as to motivate the cognitive strategies available.
description: Παιδαγωγική Επιθεώρηση, Vol. 23 (1996)
Συναρτήσεις Πυκνότητας Πιθανότητας και Υπόλοιπο Χρόνου Ζωής
Creators: name: Τογανίδης, Νικόλαος Παντελεήμωνος
Publisher: name: Aristotle University of Thessaloniki
Year: 2015
Subjects: subject: Στατιστική
subject: Συνάρτηση Πικνότητας Πιθανότητας
subject: Επέκταση Κατανομών
subject: Υπόλοιπο Χρόνου Ζωής
subject: Συνάρτηση Επιβίωσης
subject: Συνάρτηση Ποσοστού Επικινδυνότητας
subject: Κατανομή Marshall – Olkin
subject: Λογιστική Κατανομή
subject: MOEBXII
subject: MOLLD
subject: Statistics
subject: FOS: Mathematics
subject: Probability Density Function
subject: Extension of Distribution
subject: Lifetime Rest
subject: Survival Function
subject: Risk Rate Function
subject: Marshall – Olkin Distribution
subject: Logistic Distribution

description: Στην παρούσα εργασία, παρουσιάζονται κάποιες ειδικές κατανομές, οι οποίες είναι ιδιαιτέρως χρήσιμες στη μελέτη του υπολοίπου του χρόνου ζωής ενός οργανισμού ή ενός εξαρτήματος μίας μηχανής. Αρχικά γίνεται μία αναλυτική αναφορά στη βασική θεωρία της Στατιστικής, καθώς και στις βασικές έννοιες που χρειάζονται για την πλήρη κατανόηση του αντικειμένου της εργασίας. Τέτοιες έννοιες είναι η επέκταση κατανομών, η συνάρτηση επιβίωσης και η συνάρτηση ποσοστού επικινδυνότητας. Σκοπός του πρώτου εισαγωγικού κεφαλαίου, λοιπόν, είναι να καταφέρει να εισαγάγει ένα φοιτητή του Τμήματος Μαθηματικών στις βασικές απαιτούμενες γνώσεις, ώστε να μην υπάρξει πρόβλημα κατά τη μελέτη του κυρίως μέρους της εργασίας. Στο κύριο μέρος της εργασίας, γίνεται αναφορά σε νέες επεκτεταμένες κατανομές και συγκεκριμένα σε δύο: (1) Κατανομή Marshall – Olkin επεκτεταμένη κατά Burr (τύπου XII) ή MOEBXII (2) Λογαριθμική Λογιστική Κατανομή Marshall – Olkin ή MOLLD. Τέλος, μελετώνται οι ιδιότητες και οι ειδικές περιπτώσεις των παραπάνω κατανομών, καθώς και μία εφαρμογή της MOEBXII σε πραγματικά δεδομένα.
description: In this paper, there is a presentation of some special distributions, which are particularly useful in the study of the lifetime rest of an organism or of an engine accessory. In the beginning, there is an detailed reference in the basics of the theory of Statistics, along with the basic notions needed for the complete understanding of the subject of the paper. Such notions are the distribution expansion, the survival function and the risk rate function. The target of the first introductory chapter is to manage to introduce a student of the Mathematics Department into the basic knowledge so that he doesn’t face any problem while studying the main part of the paper. In the main part of the paper, there is a reference in two new expanded distributions: (1) Marshall – Olkin Distribution expanded Burr (type XII) or MOEBXII (2) Logarithmic Logistic Marshall – Olkin Distribution or MOLLD. In the end, there are studied some of the properties and special cases of those distributions, along with an application of MOEBXII in real data.