cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
iBatch: Saving Ethereum Fees via Secure and Cost-Effective Batching of Smart-Contract Invocations
Creators: name: Wang, Yibo
name: Li, Kai
name: Tang, Yuzhe
name: Chen, Jiaqi
name: Zhang, Qi
name: Luo, Xiapu
name: Chen, Ting
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cryptography and Security (cs.CR)
subject: Systems and Control (eess.SY)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: This paper presents iBatch, a middleware system running on top of an operational Ethereum network to enable secure batching of smart-contract invocations against an untrusted relay server off-chain. iBatch does so at a low overhead by validating the server's batched invocations in smart contracts without additional states. The iBatch mechanism supports a variety of policies, ranging from conservative to aggressive batching, and can be configured adaptively to the current workloads. iBatch automatically rewrites smart contracts to integrate with legacy applications and support large-scale deployment. For cost evaluation, we develop a platform with fast and cost-accurate transaction replaying, build real transaction benchmarks on popular Ethereum applications, and build a functional prototype of iBatch on Ethereum. The evaluation results show that iBatch saves 14.6%-59.1% Gas cost per invocation with a moderate 2-minute delay and 19.06%-31.52% Ether cost per invocation with a delay of 0.26-1.66 blocks.
description: Extended version from the ESEC/FSE 2021 paper
Angular momentum transport and proton-alpha differential streaming in the solar wind
Creators: name: Li, Bo
name: Habbal, Shadia Rifai
name: Li, Xing
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The effect of solar rotation on the proton-alpha differential flow speed, $v_{αp}$, and consequently on the angular momentum transport in the solar wind, is explored. It is found that the force introduced by the azimuthal components plays an important role in the force balance in interplanetary space, bringing the radial flow speeds of the species considered closer to each other. For the fast solar wind, the model cannot account for the decrease of $v_{αp}$ observed by Helios between 0.3 and 1 AU. However, it can reproduce the profile of $v_{αp}$ measured by Ulysses beyond 2 AU, if the right value for $v_{αp}$ is imposed at that distance. In the slow solar wind, the effect of solar rotation is more pronounced if one starts with the value measured by Helios at 0.3 AU. In this case, solar rotation introduces a relative change of 10-16% in the radial flow speed of the alpha particles between 1 and 4 AU. The model calculations also show that, although alpha particles consume only a small fraction of the energy and linear momentum fluxes of protons, they cannot be neglected when considering the proton angular momentum flux ${\cal L}_p$. In most examples, it is found that ${\cal L}_p$ is determined by $v_{αp}$ for both the fast and the slow wind. In the slow solar wind, it is also found that the proton and alpha angular momentum fluxes ${\cal L}_p$ and ${\cal L}_α$ can be several times larger in magnitude than the flux carried by the magnetic stresses ${\cal L}_M$. While the sum of the angular momentum fluxes ${\cal L}_P={\cal L}_p+{\cal L}_α$ of both species is found to be smaller than the magnetic stress ${\cal L}_M$, for the fast and slow wind alike, this result is at variance with the Helios measurements.
description: 10 pages, 6 figures, ApJ in press (v661n2, June 1 2007 issue), this version differs the previous one in that now it uses the emulateapj package
Zur Sanierung von Kassettenprofilfassaden mit einer neuen Außenschale aus Sandwichelementen
Creators: name: Wiegand, Alexander
Publisher: name: Technische Universität Dortmund
Year: 2021
Subjects: subject: Kassettenprofile
subject: Kassettenprofilfassade
subject: Sanierung
subject: Sandwichelemente
subject: 690
subject: Energieeffizienz
subject: Sanierung
subject: Bauen im Bestand
subject: Fassade

description: Ambitionierte klimapolitische Ziele und steigende Energiepreise führen dazu, dass das Bauen im Bestand und energetische Sanierungen zunehmend an Bedeutung gewinnen. Kassettenprofilfassaden aus der Anfangszeit dieser Bauweise eignen sich u. a. wegen ihrer aus heutiger Sicht schlechten Wärmeschutzeigenschaften in besonderem Maße für eine energetische Sanierung. Ihr modularer Aufbau erlaubt eine Sanierung ohne vollständigen Rückbau der Bestandsfassade, sodass Ressourcen geschont und Nutzungsausfälle vermieden werden können. Sandwichelemente vereinen die Funktionen „Tragen“, „Dichten“ und „Dämmen“ in einem Bauteil. Wegen ihrer hervorragenden Wärmedämmeigenschaften in Kombination mit sehr geringen Produktions- und Montagekosten eignen sie sich folglich sehr gut als Sanierungsbauteil. Die vorliegende Dissertation umfasst eine systematische Analyse des innovativen Ansatzes, Kassettenprofilfassaden ohne vollständigen Rückbau mit einer neuen Außenschale aus marktüblichen Sandwichelementen energetisch zu sanieren. Neben einer Bestandsaufnahme von sanierungsgeeigneten Kassettenprofilfassaden und bauphysikalischen Berechnungen liegt der Fokus dieser Arbeit auf statisch-konstruktiven Betrachtungen. Diese beziehen sich auf den Anwendungsfall, dass die bestehenden Kassettenprofile im Rahmen einer energetischen Sanierung erneut statisch nachgewiesen werden müssen, was mit den bisherigen Bemessungsansätzen für Kassettenprofile und Sandwichelemente nicht möglich war, weil die dazu erforderlichen wissenschaftlichen Hintergrundinformationen fehlten. Im Rahmen dieser Arbeit wird zunächst untersucht, welchen Einfluss veränderte Windlastannahmen auf den erneuten statischen Nachweis einer Kassettenprofi-fassade haben. Anschließend folgen Untersuchungen zur Aussteifung von Kassettenprofilen durch Sandwichelemente. Hierbei wird untersucht, inwieweit eine Sandwichelement-Außenschale die schmalen Obergurte der Kassettenprofile gegen seitliches Ausweichen stabilisieren kann. Darüber hinaus wird untersucht, welchen Einfluss die Steifigkeit einer Sandwichelement-Außenschale in Längsrichtung der Kassettenprofile hat. Dem folgend, werden Untersuchungen zum Lastfall Temperaturdifferenz durchgeführt, bei dem infolge von Temperaturgradienten zwischen den Deckschichten der Sandwichelemente Zwängungskräfte entstehen, die die Kassettenprofile nach der Sanierung zusätzlich belasten. Die im Rahmen dieser Arbeit gewonnenen wissenschaftlichen Erkenntnisse werden in Form von Berechnungsverfahren, Konstruktionsregeln, Bemessungskonzepten und Bemessungshilfen praxistauglich aufbereitet, sodass der erneute statische Nachweis der Kassettenprofile mit einer neuen Außenschale aus Sandwichelementen nun möglich ist.
UOCS. IV. Discovery of diverse hot companions to blue stragglers in the old open cluster King 2
Creators: name: Jadhav, Vikrant V.
name: Pandey, Sindhu
name: Subramaniam, Annapurni
name: Sagar, Ram
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: King 2, one of the oldest clusters in the Milky Way, with an age of $\sim$ 6 Gyr and distance of $\sim 5700$ pc, has been observed with UVIT payload on the \textit{ASTROSAT}. With membership information derived from {\it Gaia} EDR3, the cluster is found to have 39 blue straggler stars (BSSs). We created multi-wavelength spectra-energy distributions (SED) of all the BSSs. Out of 10 UV detected BSSs, 6 bright ones fitted with double component SEDs and were found to have hotter companions with properties similar to extreme horizontal branch (EHB)/subdwarf B (sdB) stars, with a range in luminosity and temperature, suggesting a diversity among the hot companions. We suggest that at least 15\% of BSSs in this cluster are formed via mass-transfer pathway. When we compared their properties to EHBs and hotter companions to BSS in open and globular clusters, we suggest that EHB/sdBs like companions can form in binaries of open clusters as young as 6 Gyr.
description: 14 pages, 4 figures, Accepted in Journal of Astrophysics and Astronomy
Elicitation session: Wh-questions, emphatic verb forms, progressive, plural, deverbal nouns, double object constructions
Creators: name: Diouf, Maryama
name: Merrill, John
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2022
Subjects: subject: srr

description: 1 WAV file. Session conducted monolingually in Sereer. Emphatic verb forms include doubled ones and ones with kaa. The progressive suffix is -(y)ii, and the plural is (y)oo. Additional miscellaneous topics are included.
Possible extensions of the standard cosmological model: anisotropy, rotation, and magnetic field
Creators: name: Demiański, M.
name: Doroshkevich, A. G.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We show that the difference between the theoretically expected and measured by WMAP amplitude of the quadrupole fluctuations of CMB can be related to the impact of the anisotropic curvature of the homogeneous universe dominated by the dark energy. In such universe the matter expansion becomes practically isotropic just after the period of inflation and only at small redshifts the anisotropic expansion is generated again by the small curvature $Ω_K=1- Ω_m- Ω_Λ\leq 10^{-4}$. For such models the possible deviations from the parameters derived for the standard cosmological model are evidently negligible but the correlations of large scale perturbations and distortions of their Gaussianity are possible. Such models are also compatible with existence of a homogeneous magnetic field and matter rotation which contribute to the low $\ell$ anisotropy and can be considered as ``hidden parameters'' of the model. Their influence can be observed as, for example, special correlations of small scale fluctuations and the Faraday rotation of the CMB and radiation of the farthest quasars. However, both the magnetic field and matter rotation require also modifications of the simple models of isotropic inflation and they change the evolutionary history of the early Universe.
description: 7 pages
Impact of Heart Failure on Household Economic Well-being
Creators: name: Panniyammakal Jeemon
name: Reethu Salim
name: Ganapathi, Sanjay
name: Bahl, Ajay
name: Katageri, Anand
name: Animesh Mishra
name: Anoop George Alex
name: Bhavesh Roy
name: Bishav Mohan
name: Hasit Joshi
name: Jabir Abdullakutty
name: Paul, Justin
name: Rai, Manish
name: Cholenahally Nanjappa Manjunath
name: Negi, Prakash C
name: Durgaprasad Rajasekhar
name: Rishi Sethi
name: Satyanarayan Routray
name: Radhakrishnan Shanmugasundaram
name: Sumanta Shekhar Padhi
name: Syam Sunder Reddy
name: Harikrishnan, Sivadasanpillai
Publisher: name: figshare
Year: 2021
Subjects: subject: 110201 Cardiology (incl. Cardiovascular Diseases)
subject: FOS: Clinical medicine

description: Heart failure (HF), which is an emerging public health issue, adversely affects the already strained health system in India. Globally, HF unfavorably impacts the economic well-being of the affected individuals and their families, Further, HF is known to push the affected individuals and their dependents into poverty. However, there is limited research quantifying how HF impacts the economic well-being of households from low and middle-income countries. We describe the methods of a detailed economic impact assessment of HF in India. The economic impact study in HF is initiated across 20 centres in India. The selected centres represent different regions in India stratified based on the prevailing stage of epidemiological transition. We aim to collect data from 1800 patients who were admitted with acute decompensated HF and within 6-15 months of follow-up. The data that we intend to collect will consist of a) household healthcare expenditure including out-of-pocket expenditure, b) financing mechanisms used by households and (c) the impoverishing effects of health expenditures including distress financing and catastrophic health expenditure. The results from the study will help policy makers in understanding the micro-economic impact of HF in India and aid in allocation of appropriate resources for prevention and control of HF.
Deep Extragalactic VIsible Legacy Survey (DEVILS): Stellar Mass Growth by Morphological Type since $z = 1$
Creators: name: Hashemizadeh, Abdolhosein
name: Driver, Simon P.
name: Davies, Luke J. M.
name: Robotham, Aaron S. G.
name: Bellstedt, Sabine
name: Windhorst, Rogier A.
name: Bremer, Malcolm
name: Phillipps, Steven
name: Jarvis, Matt
name: Holwerda, Benne W.
name: Lagos, Claudia del P.
name: Koushan, Soheil
name: Siudek, Malgorzata
name: Maddox, Natasha
name: Thorne, Jessica E.
name: Elahi, Pascal
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Using high-resolution Hubble Space Telescope imaging data, we perform a visual morphological classification of $\sim 36,000$ galaxies at $z < 1$ in the DEVILS/COSMOS region. As the main goal of this study, we derive the stellar mass function (SMF) and stellar mass density (SMD) sub-divided by morphological types. We find that visual morphological classification using optical imaging is increasingly difficult at $z > 1$ as the fraction of irregular galaxies and merger systems (when observed at rest-frame UV/blue wavelengths) dramatically increases. We determine that roughly two-thirds of the total stellar mass of the Universe today was in place by $z \sim 1$. Double-component galaxies dominate the SMD at all epochs and increase in their contribution to the stellar mass budget to the present day. Elliptical galaxies are the second most dominant morphological type and increase their SMD by $\sim 2.5$ times, while by contrast, the pure-disk population significantly decreases by $\sim 85\%$. According to the evolution of both high- and low-mass ends of the SMF, we find that mergers and in-situ evolution in disks are both present at $z < 1$, and conclude that double-component galaxies are predominantly being built by the in-situ evolution in disks (apparent as the growth of the low-mass end with time), while mergers are likely responsible for the growth of ellipticals (apparent as the increase of intermediate/high-mass end).
description: 29 pages, 22 figures
Temperature-dependent structure of 1-propanol/water mixtures: X-ray diffraction experiments and computer simulations at low and high alcohol contents
Creators: name: Pethes, Ildikó
name: Pusztai, László
name: Ohara, Koji
name: Temleitner, László
Publisher: name: arXiv
Year: 2021
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Aqueous mixtures of 1-propanol have been investigated by high-energy synchrotron X-ray diffraction upon cooling. X-ray weighted total scattering structure factors of 6 mixtures, from 8 mol% to 89 mol% alcohol content, as well as that of pure 1-propanol are reported from room temperature down to the freezing points of the liquids. Molecular dynamics simulations have been performed, in order to interpret measured data. The all atom OPLS-AA potential model was used for 1-propanol, combined with both the SPC/E and the TIP4P/2005 water models: both combinations provide a semi-quantitative description of the measured total structure factors at low and high alcohol contents, while the agreement is qualitative for the mixture with 71 mol% of 1-propanol. From the simulated particle configurations, partial radial distribution functions were calculated. Furthermore, detailed description of the hydrogen bonded network is provided, in terms of hydrogen bond numbers, analysis of proton donor-acceptor ratios, size distributions of hydrogen bonded clusters and ring size statistics. Strong temperature dependence of the percolation threshold, as well as of the participation of the number of doubly hydrogen bonded molecules in cyclic entities, has been found for the mixture with 89 mol% of 1-propanol. Above an alcohol content of 20 mol%, 5-fold rings are the most frequent cyclic entities, with a strong temperature dependence in terms of the number of rings.
description: 142 pages together with Supplementary Material
A quantitative study of spin noise spectroscopy in a classical gas of $^{41}$K atoms
Creators: name: Mihaila, Bogdan
name: Crooker, Scott A.
name: Rickel, Dwight G.
name: Blagoev, Krastan B.
name: Littlewood, Peter B.
name: Smith, Darryl L.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We present a general derivation of the electron spin noise power spectrum in alkali gases as measured by optical Faraday rotation, which applies to both classical gases at high temperatures as well as ultracold quantum gases. We show that the spin-noise power spectrum is determined by an electron spin-spin correlation function, and we find that measurements of the spin-noise power spectra for a classical gas of $^{41}$K atoms are in good agreement with the predicted values. Experimental and theoretical spin noise spectra are directly and quantitatively compared in both longitudinal and transverse magnetic fields up to the high magnetic field regime (where Zeeman energies exceed the intrinsic hyperfine energy splitting of the $^{41}$K ground state).
Επιστημικά συναισθήματα και μεταγνωστικές διεργασίες
Creators: name: Νεραντζάκη, Αικατερίνη Σταύρου
Publisher: name: Aristotle University of Thessaloniki
Year: 2017
Subjects: Επιστημικά συναισθήματα
Μεταγνωστικές διεργασίες
Λύση προβλημάτων
Epistemic emotions
Metacognitive processes
Problem solving

description: Σκοπός της παρούσας μελέτης ήταν να διερευνήσει τη σχέση πέντε επιστημικών συναισθημάτων (έκπληξη, περιέργεια, σύγχυση, ενδιαφέρον, απορία) με γνωστικές και μεταγνωστικές διεργασίες σε μνημονικά έργα. Δείγμα αποτέλεσαν 108 προπτυχιακοί φοιτητές του Τμήματος Ψυχολογίας του Αριστοτέλειου Πανεπιστήμιου Θεσσαλονίκης. Τα εργαλεία που χρησιμοποιήθηκαν ήταν ένα ερωτηματολόγιο για την επιστημική περιέργεια ως χαρακτηριστικό προσωπικότητας, ένα ερωτηματολόγιο για την προηγούμενη γνώση ως προς τη μνήμη, και ένα ερωτηματολόγιο για τις επιστημικές πεποιθήσεις. Το κύριο έργο ήταν τρία σενάρια που αφορούσαν φαινόμενα μάθησης και στρατηγικές μνήμης, στα οποία υπήρχε μόνο μία σωστή απάντηση. Μετά την αρχική απάντηση δινόταν επανατροφοδότηση ως προς την ορθότητά της και η επιστημονική της εξήγηση. Εξετάστηκαν η ορθότητα της απάντησης, το αίσθημα βεβαιότητας και το αίσθημα κατανόησης για την απάντηση, τα πέντε επιστημικά συναισθήματα σε τρεις διαφορετικούς χρόνους (μετά την επανατροφοδότηση, μετά την επιστημονική εξήγηση, και στο τέλος), και οι στρατηγικές μάθησης (πριν και μετά την επανατροφοδότηση). Τα αποτελέσματα έδειξαν ότι τα επιστημικά συναισθήματα διαφοροποιήθηκαν τόσο μεταξύ των ατόμων όσο και μεταξύ των τριών διαφορετικών χρόνων μέσα στο ίδιο άτομο. Σημαντικές μεταβλητές για τις διαφοροποιήσεις αυτές αποτέλεσαν η ορθότητα της απάντησης, η δυσκολία του έργου και οι μεταγνωστικές εμπειρίες
description: The purpose of this research was to investigate the relationships between five epistemic emotions (surprise, curiosity, confusion, interest, wonder) with cognitive and metacognitive processes in the context of problem solving. The sample consisted of 108 undergraduate students of the Psychology Department of the Aristotle University of Thessaloniki. Participants self- reported their epistemic curiosity, their prior knowledge about memory and their epistemic beliefs. The main task was three scenarios of learning phenomena and memory strategies. In each scenario there was only one correct answer. After each answer, participants received correct answer feedback and scientific explanation feedback. We examined the correctness of the response, the metacognitive feelings of certainty and knowing, the five epistemic emotions at three different times (after correct answer feedback and explanation feedback), and the learning strategies. Results showed that epistemic emotions varied between three different scenarios and between the three different times. Significant variables were the correctness of the answer and the metacognitive feelings
Control of the metal-insulator transition in NdNiO$_3$ thin films through the interplay between structural and electronic properties
Creators: name: Suyolcu, Y. E.
name: Fürsich, K.
name: Hepting, M.
name: Zhong, Z.
name: Lu, Y.
name: Wang, Y.
name: Christiani, G.
name: Logvenov, G.
name: Hansmann, P.
name: Minola, M.
name: Keimer, B.
name: van Aken, P. A.
name: Benckiser, E.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Heteroepitaxy offers a new type of control mechanism for the crystal structure, the electronic correlations, and thus the functional properties of transition-metal oxides. Here, we combine electrical transport measurements, high-resolution scanning transmission electron microscopy (STEM), and density functional theory (DFT) to investigate the evolution of the metal-to-insulator transition (MIT) in NdNiO$_3$ films as a function of film thickness and NdGaO$_3$ substrate crystallographic orientation. We find that for two different substrate facets, orthorhombic (101) and (011), modifications of the NiO$_6$ octahedral network are key for tuning the transition temperature $T_{\text{MIT}}$ over a wide temperature range. A comparison of films of identical thickness reveals that growth on [101]-oriented substrates generally results in a higher $T_{\text{MIT}}$, which can be attributed to an enhanced bond-disproportionation as revealed by the DFT+$U$ calculations, and a tendency of [011]-oriented films to formation of structural defects and stabilization of non-equilibrium phases. Our results provide insights into the structure-property relationship of a correlated electron system and its evolution at microscopic length scales and give new perspectives for the epitaxial control of macroscopic phases in metal-oxide heterostructures.
description: 9 pages, 5 figures
Spitzer Observations of the Prototypical Extremely Red Objects HR10 and LBDS53W091: Separating Dusty Starbursts from Old Elliptical Galaxies
Creators: name: Stern, Daniel
name: Chary, Ranga-Ram
name: Eisenhardt, Peter
name: Moustakas, Leonidas
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present Spitzer Space Telescope observations of the well-studied extremely red objects (EROs) HR10 and LBDS53W091 from 3.6 to 160 microns. These galaxies are the prototypes of the two primary classes of EROs: dusty starbursts and old, evolved galaxies, respectively. Both galaxies, as well as LBDS53W069, another example of an old, quiescent galaxy, are well-detected out to 8 microns. However, only the dusty starburst HR10 is detected in the far-infrared. All three EROs have stellar masses of a few times 10^11 M(sun). Using evolutionary model fits to their multiband photometry, we predict the infrared colors of similar EROs at 1
description: 23 pages, 4 figures; accepted to the Astronomical Journal
Diffusion Limited Aggregation (DLA) with growth bias
Creators: name: Χοτοκουρίδου, Βαρβάρα Θεμιστοκλή
Publisher: name: Aristotle University of Thessaloniki
Year: 2017
Subjects: Προτιμητέα
Ανάπτυξη
DLA
Bias
Growth

description: Στην παρούσα εργασία μελετήσαμε το μοντέλο Diffusion Limited Aggregation (DLA) το οποίο είναι είναι ένα δενδροειδές φράκταλ και επιβεβαιώσαμε την τιμή της μορφοκλασματικής του διάστασης η οποία σε 2D είναι περίπου 1.71 σύμφωνα με τη βιβλιογραφία. Η μέθοδος που εφαρμόσαμε για τον υπολογισμό της μορφοκλασματικής διάστασης είναι η μέθοδος sandbox. Σε δεύτερη φάση μελετήσαμε τη σχέση της μορφοκλασματικής διάστασης με τη βαρύτητα. Για να προσομοιώσουμε τη βαρύτητα δώσαμε μεγαλύτερη πιθανότητα να κινηθούν τα σωματίδια προς τα κάτω σε αντίθεση με το κλασσικό τυχαίο περίπατο όπου τα σωματίδια έχουν ίση πιθανότητα να κινηθούν σε οποιαδήποτε από τις τέσσερις πιθανές κατευθύνσεις. Παρατηρήσαμε ότι όσο αυξάνουμε την πιθανότητα αυτή η μορφοκλασματική διάσταση αυξάνεται απότομα και από μια συγκεκριμένη τιμή της πιθανότητας κι έπειτα, η μορφοκλασματική διάσταση σταθεροποιείται σε μια συγκεκριμένη τιμή. Επιπλέον παρατηρήσαμε ότι υπάρχει διαφοροποίηση στη μορφή των συσσωματωμάτων. Όσο αυξάνεται η τιμή της πιθανότητας τα συσσωματώματα γίνονται πιο στενά και πιο πυκνά
description: In this master thesis we study Diffusion Limited Aggregation (DLA) model which is a fractal-like model and we confirmed the theoretical value of its fractal dimension which in 2D is approximately 1.71. We applied sandbox method for the calculation of the fractal dimension. We also studied DLA with growth bias in order to find the relation between fractal dimension with gravity. Contrary to the normal random walk where the particles have equal probabilities of moving in each one of the four possible directions, in order to simulate gravity we gave a higher probability to the particles to move towards down leaving equal probabilities to the other directions. We observed an increase on the DLA fractal dimension which is stabilized after a particular value of the down probability. We also observed that there is clearly a drift down in the shape of the aggregates and as the probability increases the aggregate becomes more dense
Complete chaotic synchronization in mutually coupled time-delay systems
Creators: name: Landsman, Alexandra S.
name: Schwartz, Ira B.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: Complete chaotic synchronization of end lasers has been observed in a line of mutually coupled, time-delayed system of three lasers, with no direct communication between the end lasers. The present paper uses ideas from generalized synchronization to explain the complete synchronization in the presence of long coupling delays, applied to a model of mutually coupled semiconductor lasers in a line. These ideas significantly simplify the analysis by casting the stability in terms of the local dynamics of each laser. The variational equations near the synchronization manifold are analyzed, and used to derive the synchronization condition that is a function of the parameters. The results explain and predict the dependence of synchronization on various parameters, such as time-delays, strength of coupling and dissipation. The ideas can be applied to understand complete synchronization in other chaotic systems with coupling delays and no direct communication between synchronized sub-systems.
description: 22 pages, 6 figures
Additional file 1 of The RIO trial: rationale, design, and the role of community involvement in a randomised placebo-controlled trial of antiretroviral therapy plus dual long-acting HIV-specific broadly neutralising antibodies (bNAbs) in participants diagnosed with recent HIV infection—study protocol for a two-stage randomised phase II trial
Creators: name: Lee, Ming Jie
name: Collins, Simon
name: Babalis, Daphne
name: Johnson, Nicholas
name: Falaschetti, Emanuela
name: Prevost, A. Toby
name: Ashraf, Ambreen
name: Jacob, Milaana
name: Cole, Tom
name: Hurley, Lisa
name: Pace, Matthew
name: Ogbe, Ane
name: Khan, Maryam
name: Zacharopoulou, Panagiota
name: Brown, Helen
name: Sutherland, Euan
name: Box, Hanna
name: Fox, Julie
name: Deeks, Steven
name: Horowitz, Jill
name: Nussenzweig, Michel C.
name: Caskey, Marina
name: Frater, John
name: Fidler, Sarah
Publisher: name: figshare
Year: 2022
Subjects: subject: Biotechnology
subject: Immunology
subject: FOS: Clinical medicine
subject: Cancer
subject: Science Policy
subject: Mental Health
subject: Infectious Diseases
subject: FOS: Health sciences
subject: Virology

description: Additional file 1.
Τουρισμός και Περιφερειακή Ανάπτυξη
Creators: name: Ανδρεάδης, Γεώργιος Αριστοτέλης
Publisher: name: Aristotle University of Thessaloniki
Year: 2017
Subjects: Ανθεκτικότητα
Περιφερειακή Ανθεκτικότητα
Εκτίμηση της Ανθεκτικότητας Τουριστικών Προορισμών της Ελλάδας την Περίοδο της Οικονομικής Κρίσης
Resilience
Regional Resilience
Assessing Resilience of Tourist destinations in Greece

description: Σκοπός της διπλωματικής εργασίας ήταν η μελέτη της ανθεκτικότητας των τουριστικών προορισμών της Ελλάδας την περίοδο της Οικονομικής κρίσης. Αρχικά προβήκαμε στην εννιολογική προσέγγιση του τουριστικού φαινόμενου, επιχειρήσαμε μια αποτύπωση της ιστορικής εξέλιξης του Τουρισμού, καταγράψαμε τις επιπτώσεις του Τουρισμού στους Τουριστικούς Προορισμούς και μελετήσαμε την συμβολή του Τουρισμού στην ανάπτυξιακή διαδικασία των περιφερειών. Εν συνεχεία αποσαφηνήσαμε την εννοια της ανθεκτικότητας όπως αυτής χρησιμοποιείται σε διάφορα επιστημονικά πεδία , της οικονομικής ανθεκτικότητας και της περιφερειακής ανθεκτικότητας αναφέροντας παραδείγματα αποτίμησης της ανθεκτικότητας σε περιφερειακό επίπεδο και αναφέροντας την κριτική που επιδέχεται η έννοια της περιφερειακής ανθεκτικότητας. ΄Έπειτα εστιαστήκαμε στην ανθεκτικότητα του τουριστικού κλάδου και των τουριστικών προορισμών στις επιπτώσεις της Οικονομικής κρίσης. Ακολούθως αποτυπώθηκε η πορεία του Ελληνικού τουρισμού , η καταγραφή της οικονομικής κρίσης στην Ελλάδα και επιχειρήθηκε η καταγραφή των επιπτώσεων της Οικονομικής κρίσης στον Ελληνικό Τουρισμό. Τέλος, σε εμπειρικό επίπεδο εξετάσαμε την ανθεκτικότητα των Περιφερειών Κρήτης, Αττικής και Ηπείρου στις επιπτώσεις της Οικονομικής Κρίσης ως αντιπρωσευτικά παραδείγματα μαζικού , αστικού και ενναλακτικού τουρισμού.
description: Τhe aim of the present thesis was to study the resilience of tourist destinations of Greece during the period of economic crisis. Initially we proceeded to the conceptual approach of the tourist phenomenon, we attempted to capture the historical development of tourism, we recorded the impact of Tourism on the Tourist Destinations and we studied the contribution of Tourism in the development process of the regions. We then clarified the notion of resilience as it is used in various scientific fields, economic resilience and regional resilience, indicating examples of regional resilience assessment and citing the criticism of the concept of regional resilience. We then focused on the resilience of the tourist industry and tourist destinations to the impact of the economic crisis. Then the course of Greek tourism, the economic crisis in Greece and the impact of the economic crisis on Greek tourism was recorded. Finally, on an empirical level, we examined the resilience of the Regions of Crete, Attica and Epirus to the impact of the Economic Crisis as representative examples of mass, urban and alternative tourism.
The Semiclassical Modified Nonlinear Schroedinger Equation I: Modulation Theory and Spectral Analysis
Creators: name: DiFranco, Jeffery C.
name: Miller, Peter D.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences

description: We study an integrable modification of the focusing nonlinear Schroedinger equation from the point of view of semiclassical asymptotics. In particular, (i) we establish several important consequences of the mixed-type limiting quasilinear system including the existence of maps that embed the limiting forms of both the focusing and defocusing nonlinear Schroedinger equations into the framework of a single limiting system for the modified equation, (ii) we obtain bounds for the location of discrete spectrum for the associated spectral problem that are particularly suited to the semiclassical limit and that generalize known results for the spectrum of the nonselfadjoint Zakharov-Shabat spectral problem, and (iii) we present a multiparameter family of initial data for which we solve the associated spectral problem in terms of special functions for all values of the semiclassical scaling parameter. We view our results as part of a broader project to analyze the semiclassical limit of the modified nonlinear Schroedinger equation via the noncommutative steepest descent procedure of Deift and Zhou, and we also present a self-contained development of a Riemann-Hilbert problem of inverse scattering that differs from those given in the literature and that is well-adapted to semiclassical asymptotics.
description: 56 Pages, 21 Figures
Nonthermal hard X-ray excess in the Coma cluster: resolving the discrepancy between the results of different PDS data analyses
Creators: name: Fusco-Femiano, Roberto
name: Landi, Raffaella
name: Orlandini, Mauro
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The detection of a nonthermal excess in the Coma cluster spectrum by two BeppoSAX observations analyzed with the XAS package (Fusco-Femiano et al.) has been disavowed by an analysis (Rossetti & Molendi) performed with a different software package (SAXDAS) for the extraction of the spectrum. To resolve this discrepancy we reanalyze the PDS data considering the same software used by Rossetti & Molendi. A correct selection of the data and the exclusion of contaminating sources in the background determination show that also the SAXDAS analysis reports a nonthermal excess with respect to the thermal emission at about the same confidence level of that obtained with the XAS package (~4.8sigma). Besides, we report the lack of the systematic errors investigated by Rossetti & Molendi and Nevalainen et al. taking into account the whole sample of the PDS observations off the Galactic plane, as already shown in our data analysis of Abell 2256 (Fusco-Femiano, Landi & Orlandini). All this eliminates any ambiguity and confirms the presence of a hard tail in the spectrum of the Coma cluster.
description: 12 pages, 2 figures. Accepted for publication in ApJ Letters
MPEC 2025-G76 : DAILY ORBIT UPDATE (2025 April 5)
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2025
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Corrections and acknowledgment for ``Local limit theory and large deviations for supercritical branching processes''
Creators: name: Ney, P. E.
name: Vidyashankar, Anand N.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics

description: Corrections and acknowledgment for ``Local limit theory and large deviations for supercritical branching processes'' [math.PR/0407059]
description: Published at http://dx.doi.org/10.1214/105051606000000574 in the Annals of Applied Probability (http://www.imstat.org/aap/) by the Institute of Mathematical Statistics (http://www.imstat.org)
CMB quadrupole suppression: I. Initial conditions of inflationary perturbations
Creators: name: Boyanovsky, D.
name: de Vega, H. J.
name: Sanchez, N. G.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We investigate the issue of initial conditions of curvature and tensor perturba- tions at the beginning of slow roll inflation and their effect on the power spectra. Renormalizability and small back reaction constrain the high k behavior of the Bogoliubov coefficients that define these initial conditions.We introduce a transfer function D(k) which encodes the effect of generic initial conditions on the power spectra. The constraint from renormalizability and small back reaction entails that D(k) < mu^2/k^2 for large k, implying that observable effects from initial conditions are more prominent in the low multipoles. This behavior affects the CMB quadrupole by the observed amount \~10-20% when mu is of the order of the energy scale of inflation. The effects on high l-multipoles are suppressed by a factor ~1/l^2 due to the fall off of D(k) for large wavevectors k. We show that the determination of generic initial conditions for the fluc- tuations is equivalent to the scattering problem by a potential V(eta) localized just prior to the slow roll stage. Such potential leads to a transfer function D(k) which automatically obeys the renormalizability and small backreaction constraints. We find that an attractive potential V(eta) yields a suppression of the lower CMB multipoles.Both for curvature and tensor modes, the quadrupole suppression depends only on the energy scale of V(eta) and on the time interval where V(eta) is nonzero. A suppression of the quadrupole for curvature pertur- bations consistent with the data is obtained when the scale of the potential is of the order of k^2_Q where k_Q is the wavevector whose physical wavelength is the Hubble radius today.
description: Some comments and references added
Effects of rf power and tube wall temperature on plasma stability and analyte emission in furnace atomization plasma excitation spectrometry
Creators: name: Rahman, Md. Mahburbur
Publisher: name: University of British Columbia
Year: 2009

description: Furnace Atomization Plasma Excitation Spectrometry ( FAPES ) is a relatively new emission spectrochemical method. For analyte atomization and excitation, this method employs a graphite furnace and an atmospheric pressure plasma sustained inside the furnace. The main objective of this work was to characterize the plasma at high rf powers, up to 150 W, during the analyte atomization cycle. The temporal response of CO and He (I) line at different rf powers shows complex emission characteristics during the atomization step. The intensity of CO and He (I) emission decreases suddenly at higher furnace temperature and higher rf powers. This sudden decrease of intensity indicates the extinguishing of plasma at higher temperature as a result of the changing in power coupling efficiency between the load impedance and output impedance of the rf oscillator. The reflected power level also increases with increasing forward power and does not depend absolutely on the furnace wall temperature but on the temperature of rf center electrode. The spatial distribution of analyte in the plasma shows an increase in emission intensity from the center of the furnace toward the wall, reaches a maximum at 1.25 mm from the center, followed by a decrease. Both atomic absorption and emission experiments show a non - uniform temperature distribution along the length of the rf electrode. In comparison to the furnace wall , the temperature lag of the rf electrode causes analyte condensation on the rf electrode and subsequent re-vaporization, resulting in two peaks in the temporal response of the analyte. Analyte condensation on the rf electrode is severe at lower rf powers but at higher rf powers, for example 125 W, the rf electrode becomes too hot to act as a second surface and, as a result, a single peak is observed. The effect of rf power on analyte signal is a decrease in integrated intensity for both emission and absorption at rf powers higher than 30 W due to several reasons including pre-atomization loss of analyte, a change in excitation characteristics, and an increase in ionization of analyte at higher rf powers. Furthermore, the shape of the peaks shows that the residence time for excited Ag atoms is shorter than that for ground state atoms at rt power 50 W and more. This observation suggests that some of the ground state atoms do not become excited due to quenching of the plasma which is likely because of the change in power coupling efficiency between the load impedance and output impedance due to rapid change of temperature and / or rapid change in thermionic electron density in the furnace.
Bound State Solutions of Klein-Gordon Equation with the Kratzer Potential
Creators: name: Kocak, M.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The relativistic problem of spinless particle subject to a Kratzer potential is analyzed. Bound state solutions for the s-wave are found by separating the Klein-Gordon equation in two parts, unlike the similar works in the literature, which provides one to see explicitly the relativistic contributions, if any, to the solution in the non-relativistic limit.
description: 6 pages
Note on the Schwarz Triangle functions
Creators: name: Harmer, M.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Mathematics
subject: 11F30, 42A16

description: We shown the rationality of the Taylor coefficients of the inverse of the Schwarz triangle functions for a triangle group about any vertex of the fundamental domain.
description: 1 figure
Determining the optimum thickness for high harmonic generation from nanoscale thin films: an ab initio computational study
Creators: name: Yamada, Shunsuke
name: Yabana, Kazuhiro
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We theoretically investigate high harmonic generation (HHG) from silicon thin films with thicknesses from a few atomic layers to a few hundreds of nanometers, to determine the most efficient thickness for producing intense HHG in the reflected and transmitted pulses. For this purpose, we employ a few theoretical and computational methods. The most sophisticated method is the ab initio time-dependent density functional theory coupled with the Maxwell equations in a common spatial resolution. This enables us to explore such effects as the surface electronic structure and light propagation, as well as electronic motion in the energy band in a unified manner. We also utilize a multiscale method that is applicable to thicker films. Two-dimensional approximation is introduced to obtain an intuitive understanding of the thickness dependence of HHG. From these ab initio calculations, we find that the HHG signals are the strongest in films with thicknesses of 2-15 nm, which is determined by the bulk conductivity of silicon. We also find that the HHG signals in the reflected and transmitted pulses are identical in such thin films. In films whose thicknesses are comparable to the wavelength in the medium, the intensity of HHG signals in the reflected (transmitted) pulse is found to correlate with the magnitude of the electric field at the front (back) surface of the thin film.
description: 12 pages, 5 figures
Διαδικασία παρέμβασης στις αφηγηματικές δεξιότητες με τη μέθοδο του θεατρικού παιχνιδιού: Μελέτη περίπτωσης παιδιού με γλωσσικές διαταραχές
Creators: name: Σιδηροπούλου, Αικατερίνη Αναστασίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2017
Subjects: γλωσσική διαταραχή
αφηγηματικές δεξιότητες
θεατρικό παιχνίδι
language disorder
narrative skills
drama

description: Το θέμα της παρούσας εργασίας αναφέρεται στη μελέτη περίπτωσης μαθήτριας με διαταραχή στη γλωσσική έκφραση. Η εργασία αποτελείται από δύο μέρη. Το πρώτο μέρος αφορά στην επισκόπηση της βιβλιογραφίας με σχετική θεματολογία και στις έρευνες που έχουν διεξαχθεί διεθνώς. Το δεύτερο μέρος αναφέρεται στην εκπαιδευτική παρέμβαση, που αναπτύχθηκε στο πλαίσιο της συγκεκριμένης εργασίας, με στόχο τη βελτίωση των αφηγηματικών δεξιοτήτων της μαθήτριας. Η συγκεκριμένη παρέμβαση αποτελείται από δεκαέξι συνεδρίες στη διάρκεια των οποίων έγινε χρήση δύο διαφορετικών διδακτικών μεθόδων. Στο τέλος γίνεται αφενός συνολική εκτίμηση της γλωσσικής κατανόησης και της γλωσσικής έκφρασης της μαθήτριας και αφετέρου σύγκριση της αποτελεσματικότητας των δύο διδακτικών μεθόδων
description: The current study is focused on the assessment of a student with disorder in language expression. The study is composed of two parts. In the first part a literature review of internationally acclaimed studies with relevant thematology is presented. The latter part is focused on the intervention that was employed, as part of the current study, to improve the narrative skills of the student. In particular, two distinct teaching methods were utilized during the sixteen sessions of this intervention. As a result, an overall evaluation of the language understanding and expression of the student is presented, as well as a comparison for the effectiveness of the two teaching methods that were employed during the study
Consultant background and elicitation on nominal possession
Creators: name: Aguilar Láinez, Onísimo Basbaldo
name: Scott, Tessa
name: Sales, Henry
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2023
Subjects: subject: mam

description: This is a one hour remote video interview held using Zoom. Henry Sales, a Mam speaker from San Juan Atitán, provides translation between English and Mam using Mam and Spanish. For the majority of the interview, Tessa asks consultant questions about language background and upbringing, and explains the idea of an archive and the methods for future interviews. Near minute 48:30 is a brief elicitation on nominal possession of "ja" - "house". In this file bundle: 1 Zoom video/audio recording and 1 Zoom chat file and 1 .csv file with language background information.
Absence of Wigner Crystallization in Graphene
Creators: name: Dahal, Hari P
name: Joglekar, Yogesh N.
name: Bedell, Kevin S.
name: Balatsky, Alexander V.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Graphene, a single sheet of graphite, has attracted tremendous attention due to recent experiments which demonstrate that carriers in it are described by massless fermions with linear dispersion. In this note, we consider the possibility of Wigner crystallization in graphene in the absence of external magnetic field. We show that the ratio of potential and kinetic energy is independent of the carrier density, the tuning parameter that usually drives Wigner crystallization and find out that for given material parameters (dielectric constant and Fermi velocity), Wigner crystallization is not possible. We comment on the how these results change in the presence of a strong external magnetic field.
description: 3 pages, 1 figure,Submitted for PRB
Additional file 2 of The RIO trial: rationale, design, and the role of community involvement in a randomised placebo-controlled trial of antiretroviral therapy plus dual long-acting HIV-specific broadly neutralising antibodies (bNAbs) in participants diagnosed with recent HIV infection—study protocol for a two-stage randomised phase II trial
Creators: name: Lee, Ming Jie
name: Collins, Simon
name: Babalis, Daphne
name: Johnson, Nicholas
name: Falaschetti, Emanuela
name: Prevost, A. Toby
name: Ashraf, Ambreen
name: Jacob, Milaana
name: Cole, Tom
name: Hurley, Lisa
name: Pace, Matthew
name: Ogbe, Ane
name: Khan, Maryam
name: Zacharopoulou, Panagiota
name: Brown, Helen
name: Sutherland, Euan
name: Box, Hanna
name: Fox, Julie
name: Deeks, Steven
name: Horowitz, Jill
name: Nussenzweig, Michel C.
name: Caskey, Marina
name: Frater, John
name: Fidler, Sarah
Publisher: name: figshare
Year: 2022
Subjects: subject: Biotechnology
subject: Immunology
subject: FOS: Clinical medicine
subject: Cancer
subject: Science Policy
subject: Mental Health
subject: Infectious Diseases
subject: FOS: Health sciences
subject: Virology

description: Additional file 2.