cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
First Look Murchison Widefield Array observations of Abell 3667
Creators: name: Hindson, L.
name: Johnston-Hollitt, M.
name: Hurley-Walker, N.
name: Buckley, K.
name: Morgan, J.
name: Carretti, E.
name: Dwarakanath, K. S.
name: Bell, M.
name: Bernardi, G.
name: Bhat, N. D. R.
name: Bowman, J. D.
name: Briggs, F.
name: Cappallo, R. J.
name: Corey, B. E.
name: Deshpande, A. A.
name: Emrich, D.
name: Ewall-Wice, A.
name: Feng, L.
name: Gaensler, B. M.
name: Goeke, R.
name: Greenhill, L. J.
name: Hazelton, B. J.
name: Jacobs, D.
name: Kaplan, D. L.
name: Kasper, J. C.
name: Kratzenberg, E.
name: Kudryavtseva, N.
name: Lenc, E.
name: Lonsdale, C. J.
name: Lynch, M. J.
name: McWhirter, S. R.
name: McKinley, B.
name: Mitchell, D. A.
name: Morales, M. F.
name: Morgan, E.
name: Oberoi, D.
name: Ord, S. M.
name: Pindor, B.
name: Prabu, T.
name: Procopio, P.
name: Offringa, A. R.
name: Riding, J.
name: Rogers, A. E. E.
name: Roshi, A.
name: Shankar, N. Udaya
name: Srivani, K. S.
name: Subrahmanyan, R.
name: Tingay, S. J.
name: Waterson, M.
name: Wayth, R. B.
name: Webster, R. L.
name: Whitney, A. R.
name: Williams, A.
name: Williams, C. L.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: The Murchison Widefield Array (MWA) is a new low frequency interferometric radio telescope, operating in the remote Murchison Radio Observatory in Western Australia. In this paper we present the first MWA observations of the well known radio relics in Abell 3667 (A3667) between 120 and 226 MHz. We clearly detect the radio relics in A3667 and present flux estimates and spectral indices for these features. The average spectral index of the north-west (NW) and south-east (SE) relics is -0.9 +/- 0.1 between 120 and 1400 MHz. We are able to resolve spatial variation in the spectral index of the NW relic from -1.7 to -0.4, which is consistent with results found at higher frequencies.
description: 4 pages, 4 figures, accepted for the 31st URSI General Assembly Proceedings to be published in IEEE Xplore
title: Εξαγωγικό μάρκετινγκ αγροδιατροφικών προϊόντων: πιλοτική έρευνα σε τρία προϊόντα
titleType: AlternativeTitle
Creators: name: Βεζυρτζής, Μαργαρίτης Κ.
Publisher: name: University of Thessaly
Year: 2014
Subjects: subject: ΜΑΡΚΕΤΙΝΓΚ ΕΞΑΓΩΓΩΝ
subject: ΑΓΡΟΤΙΚΑ ΠΡΟΙΟΝΤΑ -- ΜΑΡΚΕΤΙΝΓΚ
subject: ΕΡΕΥΝΑ ΑΓΟΡΑΣ

description: Σημείωση: διατίθεται συμπληρωματικό υλικό σε ξεχωριστό αρχείο.
Method of difference-differential equations for some Bethe ansatz solvable models
Creators: name: Ristivojevic, Zoran
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: In studies of one-dimensional Bethe ansatz solvable models, a Fredholm integral equation of the second kind with a difference kernel on a finite interval often appears. This equation does not generally admit a closed-form solution and hence its analysis is quite complicated. Here we study a family of such equations concentrating on their moments. We find exact relations between the moments in the form of difference-differential equations. The latter results significantly advance the analysis, enabling one to practically determine all the moments from the explicit knowledge of the lowest one. As applications, first we study the moments of the quasimomentum distribution in the Lieb-Liniger model and find explicit analytical results. The latter moments determine several basic quantities, e.g., the $N$-body local correlation functions. We prove the equivalence between different expressions found in the literature for the three-body local correlation functions and find an exact result for the four-body local correlation function in terms of the moments of the quasimomentum distributions. We eventually find the analytical results for the three- and four-body correlation functions in the form of asymptotic series in the regimes of weak and strong interactions. Next, we study the exact form of the low-energy spectrum of a magnon (a polaron) excitation in the two-component Bose gas described by the Yang-Gaudin model. We find its explicit form, which depends on the moments of the quasimomentum distributions of the Lieb-Liniger model. Then, we address a seemingly unrelated problem of capacitance of a circular capacitor and express the exact result for the capacitance in the parametric form. In the most interesting case of short plate separations, the parametric form has a single logarithmic term. This should be contrasted with the explicit result that has a complicated structure of logarithms.
description: 12 pages
FX Fade Option Model
Creators: name: Lee, David
Publisher: name: Zenodo
Year: 2022
Subjects: FX Fade Option Model

description: So-called “fade option” can be more precisely named as “point-barrier option”. The fade option is a vanilla option that exists or dies if a barrier is breached on a single preset date, which is prior or equal to the contract maturity.
description: https://finpricing.com/lib/EqBarrier.html
title: Η προστασία της ιδιοκτησίας κατά το σύνταγμα και την ΕΣΔΑ : η νομολογία του ΣτΕ και του ΕΔΔΑ
titleType: AlternativeTitle
Creators: name: Χαραλάμπους, Βασιλεία Π.
Publisher: name: University of Thessaly
Year: 2010
Subjects: subject: ΙΔΙΟΚΤΗΣΙΑ -- ΕΥΡΩΠΑΙΚΗ ΕΝΩΣΗ, ΧΩΡΕΣ ΤΗΣ -- ΔΙΚΑΙΟ ΚΑΙ ΝΟΜΟΘΕΣΙΑ
subject: ΙΔΙΟΚΤΗΣΙΑ -- ΕΛΛΑΔΑ -- ΔΙΚΑΙΟ ΚΑΙ ΝΟΜΟΘΕΣΙΑ

description: Η προστασία της ιδιοκτησίας αποτελεί θεμελιώδες και αναπαλλοτρίωτο δικαίωμα του ατόμου και τελεί υπό την εγγύηση του Συντάγματος και της ΕΣΔΑ. Για λόγους, ωστόσο, που ανάγονται στο «γενικό συμφέρον» καθίσταται θεμιτή η επιβολή αυξημένων, σε σχέση με τα άλλα συνταγματικά δικαιώματα, περιορισμών στην άσκηση του δικαιώματος της ιδιοκτησίας. Οι περιορισμοί αυτοί, που συνίστανται κυρίως, στη σχετικοποίηση της αποκλειστικής χρήσεως ή της απόλυτης καρπώσεως της ιδιοκτησίας, δεν μπορούν να φτάνουν μέχρι το σημείο να εξαφανίζουν ή να αδρανοποιούν την ιδιοκτησία σε σχέση με τον προορισμό της. Όταν δε συνεπάγονται την ολική και οριστική στέρηση της χρήσεως του ακινήτου κατά τον προορισμό του επέρχεται πλήρης αποδυνάμωση των εξουσιών της ιδιοκτησίας και πρέπει να κηρύσσεται αναγκαστική απαλλοτρίωση του ακινήτου και να καταβάλλεται αποζημίωση στον ιδιοκτήτη του, υπό τις προϋποθέσεις που ορίζει το Σύνταγμα. Η συνταγματική προστασία της ιδιοκτησίας δοκιμάζεται ιδιαίτερα όταν πρέπει να συγκρουσθεί με την συνταγματική προστασία του περιβάλλοντος. Η πλούσια σχετική ελληνική νομολογία, ιδίως του Συμβουλίου της Επικράτειας παρέχει εξαιρετικά διαφωτιστικό υλικό για τη μελέτη της έκτασης, αλλά και των ορίων της συνταγματικής προστασίας της ιδιοκτησίας ενόψει των ορίων της συνταγματικής προστασίας άλλων κατοχυρωμένων από το Σύνταγμα δικαιωμάτων, όπως το δικαίωμα στο περιβάλλον. Από την άλλη, η προστασία της ιδιοκτησίας κατά το άρθρο 1 ΠΠΠ της ΕΣΔΑ, με την συγκεκριμένη μορφή που της προσδίδει η ήδη πλούσια σχετική νομολογία του ΕΔΔΑ, δίνει μία νέα διάσταση στην προστασία της ιδιοκτησίας και κατά το ελληνικό συνταγματικό δίκαιο. Για λόγους που ανάγονται στην ουσία της όλης αντίληψης της προστασίας της ιδιοκτησίας κατά την ΕΣΔΑ, όσο και για νομικούς λόγους, που ανάγονται στη νομική ισχύ που έχει αυτή στην ελληνική έννομη τάξη, το πλαίσιο προστασίας της ιδιοκτησίας κατά την ΕΣΔΑ δεν μπορεί να συνεχίσει να λαμβάνεται πλημμελώς υπόψη, ή και να αγνοείται, όταν ο Έλληνας νομοθέτης επιβάλλει περιορισμούς στην ιδιοκτησία και ο Έλληνας δικαστής καλείται να ελέγξει τη συνταγματικότητά τους.
The solar photospheric silicon abundance according to CO5BOLD: Investigating line broadening, magnetic fields, and model effects
Creators: name: Deshmukh, S. A.
name: Ludwig, H. -G.
name: Kučinskas, A.
name: Steffen, M.
name: Barklem, P. S.
name: Caffau, E.
name: Dobrovolskas, V.
name: Bonifacio, P.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: In this work, we present a photospheric solar silicon abundance derived using CO5BOLD model atmospheres and the LINFOR3D spectral synthesis code. Previous works have differed in their choice of a spectral line sample and model atmosphere as well as their treatment of observational material, and the solar silicon abundance has undergone a downward revision in recent years. We additionally show the effects of the chosen line sample, broadening due to velocity fields, collisional broadening, model spatial resolution, and magnetic fields. CO5BOLD model atmospheres for the Sun were used in conjunction with the LINFOR3D spectral synthesis code to generate model spectra, which were then fit to observations in the Hamburg solar atlas. We present a sample of 11 carefully selected lines (from an initial choice of 39 lines) in the optical and infrared, made possible with newly determined oscillator strengths for the majority of these lines. Our final sample includes seven optical Si I lines, three infrared Si I lines, and one optical Si II line. We derived a photospheric solar silicon abundance of $\log ε_\mathrm{Si} = 7.57 \pm 0.04$, including a $-0.01$ dex correction from Non-Local Thermodynamic Equilibrium (NLTE) effects. Combining this with meteoritic abundances and previously determined photospheric abundances results in a metal mass fraction Z/X = $0.0220 \pm 0.0020$. We found a tendency of obtaining overly broad synthetic lines. We mitigated the impact of this by devising a de-broadening procedure. The over-broadening of synthetic lines does not substantially affect the abundance determined in the end. It is primarily the line selection that affects the final fitted abundance.
description: 24 pages
On the evolution of digital evidence: novel approaches for cyber investigation
Creators: name: De Maio, Giancarlo
Publisher: name: Universita degli studi di Salerno
Year: 2014
Subjects: subject: INF/01 INFORMATICA
subject: Digital forensic
subject: Cyber crime
subject: IT security

description: 2012-2013
description: Nowadays Internet is the fulcrum of our world, and the World Wide Web is the key to access it. We develop relationships on social networks and entrust sensitive documents to online services. Desktop applications are being replaced by fully-fledged web-applications that can be accessed from any devices. This is possible thanks to new web technologies that are being introduced at a very fast pace. However, these advances come at a price. Today, the web is the principal means used by cyber-criminals to perform attacks against people and organizations. In a context where information is extremely dynamic and volatile, the fight against cyber-crime is becoming more and more difficult. This work is divided in two main parts, both aimed at fueling research against cybercrimes. The first part is more focused on a forensic perspective and exposes serious limitations of current investigation approaches when dealing with modern digital information. In particular, it shows how it is possible to leverage common Internet services in order to forge digital evidence, which can be exploited by a cyber-criminal to claim an alibi. Hereinafter, a novel technique to track cyber-criminal activities on the Internet is proposed, aimed at the acquisition and analysis of information from highly dynamic services such as online social networks. The second part is more concerned about the investigation of criminal activities on the web. Aiming at raising awareness for upcoming threats, novel techniques for the obfuscation of web-based attacks are presented. These attacks leverage the same cuttingedge technology used nowadays to build pleasant and fully-featured web applications. Finally, a comprehensive study of today’s top menaces on the web, namely exploit kits, is presented. The result of this study has been the design of new techniques and tools that can be employed by modern honeyclients to better identify and analyze these menaces in the wild. [edited by Author]
Parity Conservation in Electron-Phonon Scattering in Zigzag Graphene Nanoribbon
Creators: name: Chu, Yanbiao
name: Gautreau, Pierre
name: Basaran, Cemal
Publisher: name: arXiv
Year: 2014
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: In contrast with carbon nanotubes, the absence of translational symmetry (or periodical boundary condition) in the restricted direction of zigzag graphene nanoribbon removes the selection rule of subband number conservation. However, zigzag graphene nanoribbons with even dimers do have the inversion symmetry. We, therefore, propose a selection rule of parity conservation for electron-phonon interactions. The electron-phonon scattering matrix in zigzag graphene nanoribbons is developed using the tight-binging model within the deformation potential approximation.
Linear Precoding for the MIMO Multiple Access Channel with Finite Alphabet Inputs and Statistical CSI
Creators: name: Wu, Yongpeng
name: Wen, Chao-Kai
name: Xiao, Chengshan
name: Gao, Xiqi
name: Schober, Robert
Publisher: name: arXiv
Year: 2014
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: In this paper, we investigate the design of linear precoders for the multiple-input multiple-output (MIMO) multiple access channel (MAC). We assume that statistical channel state information (CSI) is available at the transmitters and consider the problem under the practical finite alphabet input assumption. First, we derive an asymptotic (in the large system limit) expression for the weighted sum rate (WSR) of the MIMO MAC with finite alphabet inputs and Weichselberger's MIMO channel model. Subsequently, we obtain the optimal structures of the linear precoders of the users maximizing the asymptotic WSR and an iterative algorithm for determining the precoders. We show that the complexity of the proposed precoder design is significantly lower than that of MIMO MAC precoders designed for finite alphabet inputs and instantaneous CSI. Simulation results for finite alphabet signalling indicate that the proposed precoder achieves significant performance gains over existing precoder designs.
description: Accepted by IEEE Transactions on Wireless Communications. arXiv admin note: substantial text overlap with arXiv:1401.5401
Impact of LSP Character on Slepton Reach at the LHC
Creators: name: Eckel, Jonathan
name: Ramsey-Musolf, Michael J.
name: Shepherd, William
name: Su, Shufang
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Searches for supersymmetry at the Large Hadron Collider (LHC) have significantly constrained the parameter space associated with colored superpartners, whereas the constraints on color-singlet superpartners are considerably less severe. In this study, we investigate the dependence of slepton decay branching fractions on the nature of the lightest supersymmetric particle (LSP). In particular, in the Higgsino-like LSP scenarios, both decay branching fractions of $\tilde\ell_L$ and $\tildeν_\ell$ depend strongly on the sign and value of $M_1/M_2$, which has strong implications for the reach of dilepton plus MET searches for slepton pair production. We extend the experimental results for same flavor, opposite sign dilepton plus MET searches at the 8 TeV LHC to various LSP scenarios. We find that the LHC bounds on sleptons are strongly enhanced for a non-Bino-like LSP: the 95% C.L. limit for $m_{\tilde\ell_L}$ extends from 300 GeV for a Bino-like LSP to about 370 GeV for a Wino-like LSP. The bound for $\tilde\ell_L$ with a Higgsino-like LSP is the strongest (~ 490 GeV) for $M_1/M_2$ ~ $-\tan^2θ_W$ and is the weakest (~ 220 GeV) for $M_1/M_2$ ~ $\tan^2θ_W$. We also calculate prospective slepton search reaches at the 14 TeV LHC. With 100 fb$^{-1}$ integrated luminosity, the projected 95% C.L. mass reach for the left-handed slepton varies from 550 (670) GeV for a Bino-like (Wino-like) LSP to 900 (390) GeV for a Higgsino-like LSP under the most optimistic (pessimistic) scenario. The reach for the right-handed slepton is about 440 GeV. The corresponding 5$σ$ discovery sensitivity is about 100 GeV smaller. For 300 fb$^{-1}$ integrated luminosity, the reach is about 50 - 100 GeV higher.
description: 24 pages, 10 figures
Segmentation of pores within concrete-epoxy interface using synchronous chemical composition mapping and backscattered electron imaging
Creators: name: Żak, Andrzej M.
name: Wieczorek, Anna
name: Chowaniec, Agnieszka
name: Sadowski, Lukasz
Publisher: name: arXiv
Year: 2022
Subjects: subject: Applied Physics (physics.app-ph)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The method of assessing porosity using images from scanning electron microscopy is ineffective in situations where the substrate and the coating have a significantly different average atomic number, which results in a different contrast of backscattered electrons. For this reason, the analyzes carried out to date were usually based on the manual distinction of important microstructure elements, which was followed by selective thresholding. However, this method depends on the subjective action of the researcher, and may result in errors that are difficult to estimate. The presented method is based on the simultaneous collection of both the image of backscattered electrons and elemental maps obtained using an energy dispersive X-ray analyzer. Multivariate comparative analysis of the matrix was used to characterize a technique of distinguishing epoxy resin from a hydrated cement-based substrate. The proposed algorithm significantly facilitates the detection of individual interface components, and also makes comparative analyzes repeatable and reliable.
description: 10 pages, 5 figures
title: Γιαννιτσά
titleType: AlternativeTitle
Creators: name: Γεωργιάδου, Πελαγία Α.
Publisher: name: University of Thessaly
Year: 2010
Subjects: subject: ΑΣΤΙΚΗ ΑΝΑΠΤΥΞΗ -- ΕΛΛΑΔΑ -- ΓΙΑΝΝΙΤΣΑ (ΠΕΛΛΑ)
subject: ΠΟΛΕΙΣ ΚΑΙ ΚΩΜΟΠΟΛΕΙΣ -- ΑΝΑΠΤΥΞΗ -- ΕΛΛΑΔΑ -- ΓΙΑΝΝΙΤΣΑ (ΠΕΛΛΑ)

description: Στη παρούσα διπλωματική εργασία επιχειρείται η προσέγγιση της αστικής εξελικτικής πορείας των Γιαννιτσών και η επισκόπηση παραμέτρων που εξώθησαν την πόλη στη σημερινή μορφή της. Εντοπίζονται οι βασικές παράμετροι (ιστορική, οικονομική, γεωμορφολογική κ.ά.) που απέδωσαν στο χώρο τις ιδιότητες και τη μορφή του και επηρέασαν την κατανομή των ανθρωπογενών δραστηριοτήτων. Κυρίως όμως εστιάζεται το ενδιαφέρον στη βαρύτερη - χωροταξικά και πολεοδομικά- παράμετρο όλων, στην γειτνίαση των Γιαννιτσών με τη Θεσσαλονίκη και εξερευνάται η επιρροή που ασκεί η γειτονική ισχυρή συγκέντρωση στα Γιαννιτσά. Τέλος, εξετάζεται σε συνάρτηση με την αναπτυξιακή φυσιογνωμία της ευρύτερης περιοχής της περιφέρειας Κεντρικής Μακεδονίας στην Ελλάδα, τον βαλκανικό και τον ευρωπαϊκό χώρο το ενδεχόμενο της ισχυροποίησης της αλληλεπίδρασης των δύο οικισμών και η πιθανότητα έλξης κατοίκων και δυναμικής από τη Θεσσαλονίκη προς τα Γιαννιτσά- μια από τις πόλεις που ανήκουν στην άμεση σφαίρα επιρροής της μητροπολιτικής συγκέντρωσης. Επιπλέον, επιχειρείται η επαναπροσέγγιση της ταυτότητας της πόλης, αξιοποιώντας την ιστορικότητα, τα μνημεία της και τα υπόλοιπα συγκριτικά πλεονεκτήματά της.
Near 3:2 and 2:1 mean motion resonances formation in the systems observed by Kepler
Creators: name: Wang, Su
name: Ji, Jianghui
Publisher: name: arXiv
Year: 2014
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: The Kepler mission has released ~4229 transiting planet candidates. There are approximately 222 candidate systems with three planets. Among them, the period ratios of planet pairs near 1.5 and 2.0 reveal that two peaks exist for which the proportions of the candidate systems are ~7.0% and 18.0%, respectively. In this work, we study the formation of mean motion resonance (MMR) systems, particularly for the planetary configurations near 3:2 and 2:1 MMRs, and we concentrate on the interplay between the resonant configuration and the combination of stellar accretion rate, stellar magnetic field, speed of migration and additional planets. We perform more than 1000 runs by assuming a system with a solar-like star and three surrounding planets. From the statistical results, we find that under the formation scenario, the proportions near 1.5 and 2.0 can reach 14.5% and 26.0%, respectively. In addition, $\dot M=0.1\times 10^{-8} ~M_\odot ~{\rm yr^{-1}}$ is propitious toward the formation of 3:2 resonance, whereas $\dot M=2\times 10^{-8} ~M_\odot ~{\rm yr^{-1}}$ contributes to the formation of 2:1 resonance. The speed-reduction factor of type I migration $f_1\geq 0.3$ facilitates 3:2 MMRs, whereas $f_1\geq 0.1$ facilitates 2:1 MMRs. If additional planets are present in orbits within the innermost or beyond the outermost planet in a three-planet system, 3:2:1 MMRs can be formed, but the original systems trapped in 4:2:1 MMRs are not affected by the supposed planets. In summary, we conclude that this formation scenario will provide a likely explanation for Kepler candidates involved in 2:1 and 3:2 MMRs.
description: 13 pages, 8 figures, accepted for publication in ApJ
TRANSITION METAL CATALYZED REDUCTIVE VINYLIDENE REACTIONS
Creators: name: Biswas, Sourish
Publisher: name: Purdue University Graduate School
Year: 2023
Subjects: classificationCode: 340209
subject: Organometallic chemistry
classificationCode: 340211
subject: Transition metal chemistry
classificationCode: 340503
subject: Organic chemical synthesis

description: Vinylidenes are highly reactive intermediates that undergo a variety of chemical reactions. Our group has pioneered the in-situ generation of vinylidenes from bench stable 1,1-dichloroalkenes using transition metal catalysts and an exogenous reductant.Herein, we demonstrate the intramolecular insertion of vinylidenes into Si–H bonds for the synthesis of unsaturated silacycles of different ring sizes. It is well known that the replacement of carbon for silicon are of significant interest to medicinal chemists as a strategy for improving the potency or pharmacokinetic properties of biologically active compounds. This method provides convenient access to trisubstituted vinyl silanes which are synthesized intermolecularly, including those that can be used as nucleophilic partners in Hiyama cross-coupling reactions. Finally, deuterium isotope labelling experiments reveal interesting mechanistic features of the reaction.The second chapter of the thesis further highlights the reactivity of vinylidenes through utilizing a cobalt catalyst. Vinylidene complexes can be added into an alkyne intramolecularly followed by a cobalt to zinc transmetalation step. The resulting organozinc intermediate can be trapped with various electrophiles. Further, by altering the reaction condition, the cobaltacycle intermediate can be accessed using π systems to form different cycloadducts.
Towards fully automated deep-learning-based brain tumor segmentation: is brain extraction still necessary?
Creators: name: Pacheco, Bruno Machado
name: Cassia, Guilherme de Souza e
name: Silva, Danilo
Publisher: name: arXiv
Year: 2022
Subjects: subject: Image and Video Processing (eess.IV)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: State-of-the-art brain tumor segmentation is based on deep learning models applied to multi-modal MRIs. Currently, these models are trained on images after a preprocessing stage that involves registration, interpolation, brain extraction (BE, also known as skull-stripping) and manual correction by an expert. However, for clinical practice, this last step is tedious and time-consuming and, therefore, not always feasible, resulting in skull-stripping faults that can negatively impact the tumor segmentation quality. Still, the extent of this impact has never been measured for any of the many different BE methods available. In this work, we propose an automatic brain tumor segmentation pipeline and evaluate its performance with multiple BE methods. Our experiments show that the choice of a BE method can compromise up to 15.7% of the tumor segmentation performance. Moreover, we propose training and testing tumor segmentation models on non-skull-stripped images, effectively discarding the BE step from the pipeline. Our results show that this approach leads to a competitive performance at a fraction of the time. We conclude that, in contrast to the current paradigm, training tumor segmentation models on non-skull-stripped images can be the best option when high performance in clinical practice is desired.
description: 15 pages, 9 figures
Un'applicazione dell'economia condivisa al settore turistico: il caso dell'Albergo Diffuso
Creators: name: Cirillo, Maria Rosaria
Publisher: name: Universita degli studi di Salerno
Year: 2017
Subjects: subject: SECS-P/08 ECONOMIA E GESTIONE DELLE IMPRESE
subject: Sharing Economy
subject: Albergo diffuso
subject: Co-creazione valore

description: 2015 - 2016
description: La tesi è incentrata sull’importanza crescente della Sharing Economy e della co-creazione di valore. L’importanza di questo nuovo modello di consumo, si evidenzia nella tesi anche in un settore economico di rilevanza strategica per il paese, ossia il comparto del turismo e dell’ospitalità. Attraverso una literature review è stato possibile testare e verificare l’esistenza di una relazione tra la crescita della Sharing Economy e l’evoluzione culturale del consumatore e del suo territorio di riferimento. [a cura dell'Autore]
description: The thesis focuses on the increasing of Sharing Economy and Value Co-creation. The importance of this new consumption pattern is highlighted in the thesis also in an economic sector of strategic importance for the country, namely the tourism and hospitality sector. Through a literature review it was possible to test and check the existence of a relationship between the growth of Sharing Economy and the cultural evolution of the consumer and its region in question. [edited by Author]
On Rotations as Spin Matrix Polynomials
Creators: name: Curtright, T. L.
name: Van Kortryk, T. S.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Mathematical Physics (math-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Recent results for rotations expressed as polynomials of spin matrices are derived here by elementary differential equation methods. Structural features of the results are then examined in the framework of biorthogonal systems, to obtain an alternate derivation. The central factorial numbers play key roles in both derivations.
description: 6 Figures. References updated in v2, along with some editing of text
title: Εμπειρική αξιολόγηση της ποιότητας των παρεχόμενων υπηρεσιών καταναλωτών κέντρου θαλασσοθεραπείας και ευεξίας και η σχέση της με την ψυχολογική δέσμευση και τη θετική προφορική επικοινωνία
titleType: AlternativeTitle
Creators: name: Παπουτσάκη, Μαρία
Publisher: name: University of Thessaly
Year: 2006
Subjects: subject: ΑΘΛΗΤΙΣΜΟΣ -- ΔΙΟΙΚΗΣΗ ΚΑΙ ΟΡΓΑΝΩΣΗ
subject: ΚΑΤΑΝΑΛΩΤΕΣ -- ΕΡΕΥΝΑ

description: Ένας από τους σημαντικότερους παράγοντες που επηρεάζουν τη μελλοντική συμπεριφορά και στάση των καταναλωτών είναι η ποιότητα των υπηρεσιών. Σκοπός της παρούσας έρευνας ήταν να εξεταστεί: α) η δυνατότητα εφαρμογής του μοντέλου ποιότητας υπηρεσιών των Brady και Cronin (2001), στα πλαίσια ενός κέντρου θαλασσοθεραπείας και ευεξίας, β) η επίδραση των απόψεων των πελατών για τις υπηρεσίες σχετικά με τη συνολική ποιότητα και γ) ο βαθμός στον οποίο οι απόψεις αυτές μπορούν να προβλέψουν την ψυχολογική δέσμευση και την προφορική επικοινωνία. Επιπλέον, παρουσιάζεται το προφίλ των πελατών του κέντρου θαλασσοθεραπείας και ευεξίας. Διακόσιοι είκοσι τρεις (223) Έλληνες, μέλη ενός κέντρου θαλασσοθεραπείας και ευεξίας στο Ηράκλειο Κρήτης συμμετείχαν στην έρευνα. Τα αποτελέσματα επιβεβαίωσαν την αξιοπιστία και εγκυρότητα των τριών αρχικών διαστάσεων («προσωπικό», «εξοπλισμός και εγκαταστάσεις», «φυσική κατάσταση και ψυχική υγεία») του μοντέλου των Brady και Cronin (2001). Η διάσταση «φυσική κατάσταση και ψυχική υγεία» επηρέασε στο μεγαλύτερο βαθμό την άποψη των πελατών για την ποιότητα υπηρεσιών του κέντρου. Το «προσωπικό» φάνηκε να έχει την ισχυρότερη επιρροή στη συνολική ποιότητα, ενώ μαζί με τον «εξοπλισμό και τις εγκαταστάσεις» διαπιστώθηκε ότι ασκούν ισχυρή επίδραση στην πρόβλεψη της ψυχολογικής δέσμευσης Σύμφωνα με τα αποτελέσματα και οι τρεις παράγοντες συνεισέφεραν σημαντικά στην πρόβλεψη της θετικής προφορικής επικοινωνίας.
Sunspot waves and flare energy release
Creators: name: Sych, R.
name: Karlický, M.
name: Altyntsev, A.
name: Dudík, J.
name: Kashapova, L.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We address a possibility of the flare process initiation and further maintenance of its energy release due to a transformation of sunspot longitudinal waves into transverse magnetic loop oscillations with initiation of reconnection. This leads to heating maintaining after the energy release peak and formation of a flat stage on the X-ray profile. We applied the time-distance plots and pixel wavelet filtration (PWF) methods to obtain spatio-temporal distribution of wave power variations in SDO/AIA data. To find magnetic waveguides, we used magnetic field extrapolation of SDO/HMI magnetograms. The propagation velocity of wave fronts was measured from their spatial locations at specific times. In correlation curves of the 17 GHz (NoRH) radio emission we found a monotonous energy amplification of 3-min waves in the sunspot umbra before the 2012 June 7 flare. This dynamics agrees with an increase in the wave-train length in coronal loops (SDO/AIA, 171 Å) reaching the maximum 30 minutes prior to the flare onset. A peculiarity of this flare time profile in soft X-rays (RHESSI, 3-25 keV) is maintaining the constant level of the flare emission for 10 minutes after the short impulse phase, which indicates at the energy release continuation. Throughout this time, we found 30-sec period transverse oscillations of the flare loop in the radio-frequency range (NoRH, 17 GHz). This periodicity is apparently related to the transformation of propagating longitudinal 3-min waves from the sunspot into the loop transverse oscillations. The magnetic field extrapolation showed the existence of the magnetic waveguide (loop) connecting the sunspot with the energy release region. A flare loop heating can be caused by the interaction (reconnections) of this transversally oscillating waveguide with the underlying twisted loops.
description: 7 pages, 9 figures
Entanglement measures for two-particle quantum histories
Creators: name: Georgiev, Danko
name: Cohen, Eliahu
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Quantum entanglement is a key resource, which grants quantum systems the ability to accomplish tasks that are classically impossible. Here, we apply Feynman's sum-over-histories formalism to interacting bipartite quantum systems and introduce entanglement measures for bipartite quantum histories. Based on the Schmidt decomposition of the matrix comprised of the Feynman propagator complex coefficients, we prove that bipartite quantum histories are entangled if and only if the Schmidt rank of this matrix is larger than 1. The proposed approach highlights the utility of using a separable basis for constructing the bipartite quantum histories and allows for quantification of their entanglement from the complete set of experimentally measured sequential weak values. We then illustrate the non-classical nature of entangled histories with the use of Hardy's overlapping interferometers and explain why local hidden variable theories are unable to correctly reproduce all observable quantum outcomes. Our theoretical results elucidate how the composite tensor product structure of multipartite quantum systems is naturally extended across time and clarify the difference between quantum histories viewed as projection operators in the history Hilbert space or viewed as chain operators and propagators in the standard Hilbert space.
description: 14 pages, 5 figures, accepted to Physical Review A
Inelastic electron tunneling spectroscopy of nanoporous gold films
Creators: name: Liu, H. W.
name: Nishitani, R.
name: Fujita, T.
name: Li, W.
name: Zhang, L.
name: Lang, X. Y.
name: Richard, P.
name: Nakayama, K. S.
name: Chen, X.
name: Chen, M. W.
name: Xue, Q. K.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We investigated the localized electronic properties of nanoporous gold films by using an ultra-high vacuum scanning tunneling microscope at low temperature (4.2 K). Second derivative scanning tunneling spectroscopy shows the plasmon peaks of the nanoporous gold films, which are excited by inelastic tunneling electrons. We propose that the nanorod model is appropriate for nanoporous gold studies at the nanometer-scale. These results are supported by a 3D electron tomography analysis and theoretical calculations of nanoporous gold with ellipsoid shape.
description: 6 pages, 3 figures. This is the authors' version. The published, high resolution version of this paper, Copyright (2014) by the American Physical Society, can be found at http://journals.aps.org/prb/
Trasformazioni del paesaggio nel territorio di Segesta tra VII e II secolo a.C.
Creators: name: Trotta, Valentina
Publisher: name: Universita degli studi di Salerno
Year: 2014
Subjects: subject: L-ANT/10 METODOLOGIE DELLA RICERCA ARCHEOLOGICA
subject: Paesaggio
subject: Survery
subject: Segesta

description: 2012 - 2013
description: The aim of this research is to analyze the settlemet dynamics in the territory of CalatafimiSegesta (TP) between the seventh and the second century BC. The scientific background consists of the data collected during the surveys conducted in 1995-1997 by the University of Siena. The oldest archaeological traces of a cult space planning, and perhaps even the living space, on Mount Barbaro, dating back to the last quarter of the seventh century BC. During the Hellenistic period, we can see a major transformation of the landscape of Segesta, with a stable population of the countryside. At the end of the second century BC is evident a change in the large urban restructuring of Segesta and in the monumental forms of worship in the surrounding areas, expressions of political power and wealth of the local ruling class. [edited by Author]
description: La ricerca propone un’analisi delle dinamiche di popolamento che hanno caratterizzato la parte di territorio compresa all’interno dei confini comunali di Calatafimi-Segesta tra il VII ed il II secolo a.C., attraverso una revisione critica dei dati del survey condotto dall'Università di Siena negli anni 1995-1997, finalizzato alla redazione di una Carta archeologica del Comune. La scelta del termine cronologico più antico è dovuta al fatto che le prime tracce materiali di una pianificazione dello spazio cultuale, e forse anche abitativo, sul Monte Barbaro, sede in età classica dell'abitato indigeno di Segesta, risalgono all'ultimo quarto del VII secolo a.C. Nel corso dell'età ellenistica si assiste ad una profonda trasformazione del paesaggio segestano, con la fitta occupazione stabile delle campagne. Alla fine del II secolo a.C. una netta cesura è evidente nella complessa ristrutturazione urbanistica della città di Segesta e nelle forme monumentali di alcune aree cultuali nel territorio circostante, espressioni del potere politico e della ricchezza della classe dirigente locale. [a cura dell'Autore]
Intersectoral dynamics and policy perspective on emerging structure of Indian economy
Creators: name: Naresh, Kumar
Publisher: name: Социология науки и технологий
Year: 2017

description: Studies indicates that the global economy is on the brink of a recession due to slowdown in economic activities in rich economies and slow growth in the Chinese economy. The recession in global economy may have effect on developing economies like Indian economy. However, in the past it was observed that Indian economy was least affected due to global recession because economy of India is substantially based on agriculture sector. The overall economic growth is linked to the performance and dynamics of different sectors of economy. Over the years India has achieved a significant growth in all sectors; particularly service sectors by contributing the largest share in the Gross Domestic Product (GDP). Before, liberalization the economic growth was mainly dependent on Agriculture sector supported by other sectors like manufacturing and service sector. Earlier, agriculture sector was the chief constituent of the GDP followed by manufacturing and service sectors. But after the new economic policies, the inter-sectoral dynamics has reversed and growth in agriculture sector was tumbled despite major source of employment. Therefore, objective of this paper is to analyse inter-sectoral analysis and assessment of Indian economy since 1951. To understand structural shift a comparative growth pattern of agriculture, industry and service sectors are analysed along with GDP growth with policy feedback.
Monitoring quantum transport: Backaction and measurement correlations
Creators: name: Hussein, Robert
name: Gómez-García, Jorge
name: Kohler, Sigmund
Publisher: name: arXiv
Year: 2014
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We investigate a tunnel contact coupled to a double quantum dot (DQD) and employed as charge monitor for the latter. We consider both the classical limit and the quantum regime. In the classical case, we derive measurement correlations from conditional probabilities, which yields quantitative statements about the parameter regime in which the detection scheme works well. Moreover, we demonstrate that not only the DQD occupation but also the corresponding current may strongly correlate with the detector current. The quantum mechanical solution, obtained with a Bloch-Redfield master equation, shows that the backaction of the measurement tends to localize the DQD electrons and, thus, significantly reduces the DQD current. Moreover, it provides the effective parameters of the classical treatment. It turns out that already the classical description is adequate for most operating regimes.
description: 10 pages, 6 figures
title: Κανονική συνθήκη ορισμού, λίστα ορισμών, διεύθυνση, σχεδίαση και υλοποίηση αρχιτεκτονικής υψηλής απόδοσης για τους αλγόριθμους μετασχηματισμού και κβαντοποίησης του Η.264
titleType: AlternativeTitle
Creators: name: Owaida, Muhsen
Publisher: name: University of Thessaly
Year: 2007
Subjects: subject: ΗΛΕΚΤΡΟΝΙΚΟΙ ΥΠΟΛΟΓΙΣΤΕΣ -- ΠΡΟΓΡΑΜΜΑΤΑ ΠΑΡΑΓΩΓΗΣ ΒΙΝΤΕΟ
subject: ΑΛΓΟΡΙΘΜΟΙ

description: Efficient digital video coding techniques are increasingly gaining importance due to the widespread of low bit rate video streaming applications (like videotelephony and videoconferencing). This raises the need for an industry standard for compressed video representation with substantially increased coding efficiency and enhanced robustness to network environments. In 2001, the Joint Video Team (JVT) was formed to represent the cooperation between the ITU-T Video Coding Expert Group (VCEG) and the ISO/IEC Moving Picture Expert Group (MPEG) aiming for the development of a new Standard. The JVT aim was to finalize the H.26L proposal and convert it into an international standard (H.264/MPEG-4 Part 10) published by both ISO/IEC and ITU-T. H.264 provides similar functionality to earlier standards such as H.263+and MPEG-4 Visual (Simple Profile) but with significantly better compression performance and improved support for reliable transmission. It does not use the traditional 8^8 DCT transform as the basic transform, instead it suggests 4x4 DCT-based transform that can be implemented only using integer addition and shift units and avoids use of multiplication. In this project, a hardware prototype is designed for the H.264 supported quantization and variant types of supported transforms (core transform, 2x2 and 4x4 hadmard transforms). Also the inverse transform and quantization path is considered. The architecture is prototyped and simulated using ModelSim 6.1®. It is synthesized using Synopsys Design Compiler®.
Fraction of Stars in Clusters for the LEGUS Dwarf Galaxies
Creators: name: Cook, D. O.
name: Lee, J. C.
name: Adamo, A.
name: Calzetti, D.
name: Chandar, R.
name: Whitmore, B. C.
name: Aloisi, A.
name: Cignoni, M.
name: Dale, D. A.
name: Elmegreen, B. G.
name: Fumagalli, M.
name: Grasha, K.
name: Johnson, K. E.
name: Kennicutt, R. C.
name: Kim, H.
name: Linden, S. T.
name: Messa, M.
name: Östlin, G.
name: Ryon, J. E.
name: Sacchi, E.
name: Thilker, D. A.
name: Tosi, M.
name: Wofford, A.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We study the young star cluster populations in 23 dwarf and irregular galaxies observed by the HST Legacy ExtraGalactic Ultraviolet Survey (LEGUS), and examine relationships between the ensemble properties of the cluster populations and those of their host galaxies: star formation rate (SFR) density ($Σ_{\rm SFR}$). A strength of this analysis is the availability of SFRs measured from temporally resolved star formation histories which provide the means to match cluster and host-galaxy properties on several timescales (1-10, 1-100, and 10-100~Myr). Nevertheless, studies of this kind are challenging for dwarf galaxies due to the small numbers of clusters in each system. We mitigate these issues by combining the clusters across different galaxies with similar $Σ_{\rm SFR}$ properties. We find good agreement with a well-established relationship ($M_{V}^{brightest}$-SFR), but find no significant correlations between $Σ_{\rm SFR}$ and the slopes of the cluster luminosity function, mass function, nor the age distribution. We also find no significant trend between the the fraction of stars in bound clusters at different age ranges ($Γ_{1-10}$, $Γ_{10-100}$, and $Γ_{1-100}$) and $Σ_{\rm SFR}$ of the host galaxy. Our data show a decrease in $Γ$ over time (from 1-10 to 10-100~Myr) suggesting early cluster dissolution, though the presence of unbound clusters in the youngest time bin makes it difficult to quantify the degree of dissolution. While our data do not exhibit strong correlations between $Σ_{\rm SFR}$ and ensemble cluster properties, we cannot rule out that a weak trend might exist given the relatively large uncertainties due to low number statistics and the limited $Σ_{\rm SFR}$ range probed.
description: 30 pages, 15 figures, 7 tables, Accepted for publication in MNRAS
Nonintrusive reduced order modeling of convective Boussinesq flows
Creators: name: Dabaghian, Pedram H.
name: Ahmed, Shady E.
name: San, Omer
Publisher: name: arXiv
Year: 2022
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Dynamical Systems (math.DS)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: In this paper, we formulate three nonintrusive methods and systematically explore their performance in terms of the ability to reconstruct the quantities of interest and their predictive capabilities. The methods include deterministic dynamic mode decomposition (DMD), randomized DMD and nonlinear proper orthogonal decomposition (NLPOD). We apply these methods to a convection dominated fluid flow problem governed by the Boussinesq equations. We analyze the reconstruction results primarily at two different times for considering different noise levels synthetically added into the data snapshots. Overall, our results indicate that, with a proper selection of the number of retained modes and neural network architectures, all three approaches make predictions that are in a good agreement with the full order model solution. However, we find that the NLPOD approach seems more robust for higher noise levels compared to both DMD approaches.
Star-free languages and local divisors
Creators: name: Kufleitner, Manfred
Publisher: name: arXiv
Year: 2014
Subjects: subject: Formal Languages and Automata Theory (cs.FL)
subject: FOS: Computer and information sciences
subject: F.4.3
subject: 68Q45, 68Q70, 20M3

description: A celebrated result of Schützenberger says that a language is star-free if and only if it is is recognized by a finite aperiodic monoid. We give a new proof for this theorem using local divisors.
description: This is a prior version of an invited contribution at the 16th International Workshop on Descriptional Complexity of Formal Systems (DCFS 2014) in Turku, Finland. The final publication is available at Springer via http://dx.doi.org/10.1007/978-3-319-09704-6_3
PEMETAAN PENELITIAN RASIO WORKING CAPITAL TURNOVER (WCT) PADA PERBANKAN SYARIAH DAN KONVENSIONAL: STUDI BIBLIOMETRIK VOSVIEWER DAN LITERATURE REVIEW
Creators: name: Budianto, Eka Wahyu Hestya
name: Dewi, Nindi Dwi Tetria
Publisher: name: Zenodo
Year: 2023
Subjects: Working Capital Turnover (WCT)
Bibliometrics
VOSviewer
Literature Review
Islamic and Conventional Banking

description: Purpose-This study aims to determine the research mapping regarding the Working Capital Turnover (WCT) ratio in Islamic and Conventional Banking using a mix-method approach, namely the VOSviewer bibliometric study and literature review. Research Method-Data analysis techniques include: (1) mapping the distribution of journal publications around the WCT ratio; (2) mapping the results of the VOSviewer bibliometric visualization around the WCT ratio based on the number of clusters and their items; and (3) mapping research topics around the WCT ratio using a literature review study. Findings-The results showed that: (1) based on the distribution of journal publications, there were 89 journal publications regarding the WCT ratio; (2) based on the mapping of the VOSviewer bibliometric study, the network visualization results around the WCT ratio are divided into 6 clusters and 130 topic items; (3) based on the mapping of literature review studies, there are 19 topics around the WCT ratio. Implication-The implications and contributions of this research are to map research topics around WCT ratios in Islamic and Conventional Banking which are often or rarely researched by researchers so that they can be a reference for subsequent researchers. PENDAHULUAN Working Capital Turnover (WCT) merupakan rasio keuangan yang digunakan untuk mengukur seberapa efektif suatu perusahaan dalam mengelola modal kerja mereka. Rasio ini mengukur seberapa banyak pendapatan yang dihasilkan oleh setiap unit modal kerja yang dimiliki perusahaan. Dalam konteks perbankan, modal kerja adalah jumlah a