cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Multi-goal Rapidly Exploring Random Tree with Safety and Dynamic Constraints for UAV Cooperative Path Planning
Creators: name: Khuat, Thu Hang
name: Bui, Duy-Nam
name: Nguyen, Hoa TT.
name: Trinh, Mien L.
name: Nguyen, Minh T.
name: Phung, Manh Duong
Publisher: name: arXiv
Year: 2025
Subjects: subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: Cooperative path planning is gaining its importance due to the increasing demand on using multiple unmanned aerial vehicles (UAVs) for complex missions. This work addresses the problem by introducing a new algorithm named MultiRRT that extends the rapidly exploring random tree (RRT) to generate paths for a group of UAVs to reach multiple goal locations at the same time. We first derive the dynamics constraint of the UAV and include it in the problem formulation. MultiRRT is then developed, taking into account the cooperative requirements and safe constraints during its path-searching process. The algorithm features two new mechanisms, node reduction and Bezier interpolation, to ensure the feasibility and optimality of the paths generated. Importantly, the interpolated paths are proven to meet the safety and dynamics constraints imposed by obstacles and the UAVs. A number of simulations, comparisons, and experiments have been conducted to evaluate the performance of the proposed approach. The results show that MultiRRT can generate collision-free paths for multiple UAVs to reach their goals with better scores in path length and smoothness metrics than state-of-the-art RRT variants including Theta-RRT, FN-RRT, RRT*, and RRT*-Smart. The generated paths are also tested in practical flights with real UAVs to evaluate their validity for cooperative tasks. The source code of the algorithm is available at https://github.com/duynamrcv/multi-target_RRT
Universal law for the vibrational density of states of liquids
Creators: name: Zaccone, Alessio
name: Baggioli, Matteo
Publisher: name: arXiv
Year: 2021
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: An analytical derivation of the vibrational density of states (DOS) of liquids, and in particular of its characteristic linear in frequency low-energy regime, has always been elusive because of the presence of an infinite set of purely imaginary modes -- the instantaneous normal modes (INMs). By combining an analytic continuation of the Plemelj identity to the complex plane with the purely overdamped dynamics of the INMs, we derive a closed-form analytic expression for the low-frequency DOS of liquids. The obtained result explains from first principles the widely observed linear in frequency term of the DOS in liquids, whose slope appears to increase with the average lifetime of the INMs. The analytic results are robustly confirmed by fitting simulations data for Lennard-Jones liquids, and they also recover the Arrhenius law for the average relaxation time of the INMs, as expected.
description: Accepted for publication in PNAS
Analysis on the crown domain
Creators: name: Kroetz, Bernhard
name: Opdam, Eric M.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Representation Theory (math.RT)
subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 22Exx, 11Fxx

description: In this paper one finds:1) A simple combinatorical description of the distinguished boundary of the crown domain in terms of the affine Weyl group; 2) Optimal upper and lower bounds for holomorphically extended spherical functions; 3) First progress on how to attach complex invariants to irreducible representations; 4) A new unipotent model for the crown domain; 5) Optimal bounds for the exponential decay of cuspidal automorphic forms.
description: Revised version. 103 pages. To appear in GAFA
The dynamics of scalar-tensor cosmology from RS two-brane model
Creators: name: Kuusk, Piret
name: Jarv, Laur
name: Saal, Margus
Publisher: name: arXiv
Year: 2007
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We consider Randall-Sundrum two-brane cosmological model in the low energy gradient expansion approximation by Kanno and Soda. It is a scalar-tensor theory with a specific coupling function. We find a first integral of equations for the A-brane metric and estimate constraints for the dark radiation term. We perform a complementary analysis of the dynamics of the scalar field (radion) using phase space methods and examine convergence towards the limit of general relativity. We find that it is possible to stabilize the radion at a finite value with suitable negative matter densities on the B-brane.
description: 3 pages, 2 figures, to appear in Proc. of 11th Marcel Grossmann Meeting (Berlin, July 23-29, 2006)
Δυναμικές αλληλοσυσχετίσεις μεταξύ των άμεσων ξένων επενδύσεων , της οικονομικής ανάπτυξης και των διεθνών εμπορικών συναλλαγών
Creators: name: Σίνδη, Πετρούλα Χρήστου
Publisher: name: Aristotle University of Thessaloniki
Year: 2014
Subjects: Άμεσες Ξένες Επενδύσεις
Οικονομική Ανάπτυξη
Διεθνείς Εμπορικές Συναλλαγές
Ανάλυση Συνολοκλήρωσης
Foreign Direct Investments
Economic Growth
Trade Openness
Stationarity
Cointegration

description: Η παρούσα εργασία αποτελεί μια έρευνα για τη διερεύνηση της ύπαρξης μακροχρόνιας και βραχυχρόνιας σχέσης μεταξύ των άμεσων ξένων επενδύσεων, της οικονομικής ανάπτυξης και τον όγκο των διεθνών συναλλαγών, συγκεκριμένα για την Ελλάδα. Εφαρμόζονται μεθοδολογίες ανάλυσης χρονολογικών σειρών(έλεγχοι στασιμότητας, μέθοδοι συνολοκλήρωσης και υπόδειγμα διόρθωσης σφάλματος) και στις τρεις προαναφερθείσες μεταβλητές. Οι χρονικές σειρές, που χρησιμοποιούνται στη συγκεκριμένη μελέτη, στηρίζονται σε στοιχεία που έχουν αντληθεί από την μακροοικονομική βάση δεδομένων της Παγκόσμιας Τράπεζας. Αφορούν ετήσια στοιχεία και καλύπτουν την χρονική περίοδο 1970-2012. Συμπερασματικά, τα εμπειρικά αποτελέσματα ανέδειξαν μακροχρόνια σχέση ισορροπίας από την οικονομική ανάπτυξη και των διεθνών εμπορικών συναλλαγών προς τις άμεσες ξένες επενδύσεις. Αντίθετα, σε βραχυχρόνιο επίπεδο καμία μεταβλητή δεν ασκεί επίδραση στις άλλες δυο μεταβλητές.
description: This essay demonstrates a research on the existence of long-run and short-run relationships between Foreign Direct Investments, Economic Growth and Trade Openness, namely in the Greek economy. Many examinations of stationarity and cointegration are performed.The series used in this research are based on data taken from the macroeconomic database of the World Bank. They refer to annual data to the period 1970-2012. In conclusion, the empirical results have shown long-term equilibrium relationship of economic development and international trade to FDI. In contrast, in the short level no variable has no effect on the other two variables.
Deformation by Pressure Solution and Grain Boundary Sliding  in a Retrograde Shear Zone in Southern New England, USA
Creators: name: Wintsch, Robert
Publisher: name: Zenodo
Year: 2024
Subjects: diffusion creep, pressure solution

description: This is supplementary Information to accompany the article in the American Journal of Science: Wintsch et al. (2024) 

"Deformation by Pressure Solution and Grain Boundary Sliding in a Retrograde Shear Zone in Southern New England, USA"
Consistent price systems and face-lifting pricing under transaction costs
Creators: name: Guasoni, Paolo
name: Rásonyi, Miklós
name: Schachermayer, Walter
Publisher: name: arXiv
Year: 2008
Subjects: subject: Pricing of Securities (q-fin.PR)
subject: Probability (math.PR)
subject: FOS: Economics and business
subject: FOS: Mathematics
subject: 91B28 (Primary) 60G15, 60G44 (Secondary)

description: In markets with transaction costs, consistent price systems play the same role as martingale measures in frictionless markets. We prove that if a continuous price process has conditional full support, then it admits consistent price systems for arbitrarily small transaction costs. This result applies to a large class of Markovian and non-Markovian models, including geometric fractional Brownian motion. Using the constructed price systems, we show, under very general assumptions, the following ``face-lifting'' result: the asymptotic superreplication price of a European contingent claim $g(S_T)$ equals $\hat{g}(S_0)$, where $\hat{g}$ is the concave envelope of $g$ and $S_t$ is the price of the asset at time $t$. This theorem generalizes similar results obtained for diffusion processes to processes with conditional full support.
description: Published in at http://dx.doi.org/10.1214/07-AAP461 the Annals of Applied Probability (http://www.imstat.org/aap/) by the Institute of Mathematical Statistics (http://www.imstat.org)
Na-O Anticorrelation and HB. II. The Na-O anticorrelation in the globular cluster NGC 6752
Creators: name: Carretta, Eugenio
name: Bragaglia, Angela
name: Gratton, Raffaele
name: Lucatello, Sara
name: Momany, Yazan
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We are studying the Na-O anticorrelation in several globular clusters of different Horizontal Branch (HB) morphology in order to derive a possible relation between (primordial) chemical inhomogeneities and morphological parameters of the cluster population. We used the multifiber spectrograph FLAMES on the ESO Very Large Telescope UT2 and derived atmospheric parameters and elemental abundances of Fe, O and Na for about 150 red giant stars in the Galactic globular cluster NGC 6752. The average metallicity we derive is [Fe/H]=-1.56, in agreement with other results from red giants, but lower than obtained for dwarfs or early subgiants. In NGC 6752 there is not much space for an intrinsic spread in metallicity: on average, the rms scatter in [Fe/H] is 0.037+/-0.003 dex, while the scatter expected on the basis of the major error sources is 0.039+/-0.003 dex. The distribution of stars along the Na-O anticorrelation is different to what was found in the first paper of this series for the globular cluster NGC 2808: in NGC 6752 it is skewed toward more Na-poor stars, and it resembles more the one in M 13. Detailed modeling is required to clarify whether this difference may explain the very different distributions of stars along the HB.
description: 13 pages, 8 figures; tables 2,3,5 available at CDS. Accepted for publication on A&A
Ο θρησκευτικός φονταμενταλισμός στην σύγχρονη πραγματικότητα.
Creators: name: Γκαργκάνα, Σουλτάνα Στέργιου
Publisher: name: Aristotle University of Thessaloniki
Year: 2014
Subjects: Φονταμενταλισμός
Νεωτερικότητα
Ισλάμ
Fundamentalism
Modernity
Islam

description: Οι κοινωνικοί επιστήμονες αναγνωρίζουν σήμερα ότι το φαινόμενο του θρησκευτικού φονταμενταλισμού αναδύθηκε στο εσωτερικό πολλών θρησκειών ως αντίδραση στις φιλελεύθερες θρησκευτικές ερμηνείες που έφερνε η νεωτερικότητα. Ο ισλαμικός φονταμενταλισμός είναι ένα πολιτικό κίνημα που έχει σαν στόχο την εγκαθίδρυση ενός κράτους βασισμένου στις αρχές της Μουσουλμανικής θρησκείας όπως αυτές διατυπώθηκαν τον 7ο αιώνα. Υπάρχει όμως διαφοροποίηση των εκφραστών του κινήματος αυτού από χώρα σε χώρα ανάλογα με το ιστορικό πλαίσιο και τις πολιτικοκοινωνικές συνθήκες που επικρατούν εκεί. Στον ισλαμικό φονταμενταλισμό μπορούμε να διακρίνουμε τριών ειδών μορφές. Τη ριζοσπαστική μορφή, τη μορφή του φονταμενταλισμού όπου συμβαίνει η συνθηκολόγηση του επαναστατικού πνεύματος με τα οφέλη της νεωτερικότητας, και τέλος την τρίτη μορφή που παραδέχεται μεν τη σημασία της παράδοσης προσπαθεί όμως να της δώσει ένα εκσυγχρονιστικό περιεχόμενο. Η πλειοψηφία των μεγάλων κοσμικών θρησκειών λειτούργησε με τον ένα ή τον άλλο τρόπο, σε κάποια στιγμή της ιστορίας τους, ως μέσο περιορισμού του ρόλου των γυναικών μέσα στην κοινωνία. Η επιβεβαίωση της κατωτερότητας των γυναικών στη διδασκαλία συγκεκριμένων θρησκειών ήταν τόσο διάχυτη, ώστε πολλοί άνθρωποι σήμερα πιστεύουν ότι οι θρησκευτικές αντιλήψεις συχνά καταλήγουν ασυμβίβαστες με κάθε προσπάθεια για ισότητα των φύλων στην κοινωνία μας.
description: Social scientists now recognize that the phenomenon of religious fundamentalism emerged within many religions, as a reaction to liberal religious interpretations that brought modernity. Islamic fundamentalism is a political movement that aims to establish a state based on the principles of the Muslim religion as expressed in the 7th century. There is differentiation of expressions of this movement from country to country depending on the historical context and the socio-political conditions there. Islamic fundamentalism can distinguish three types of forms. Radical form, the form of fundamentalism which case the capitulation of the revolutionary spirit of the benefits of modernity, and finally the third form which admits although the importance of tradition but trying to give her a modernizing content. The majority of large cosmic religions worked in one way or another, at some point in their history, as a means of limiting the role of women in society. Confirmation of the inferiority of women in teaching a particular religion was so pervasive that many people today believe that religious beliefs often result incompatible with any attempt to gender equality in our society.
Microwave potentials and optimal control for robust quantum gates on an atom chip
Creators: name: Treutlein, Philipp
name: Hänsch, Theodor W.
name: Reichel, Jakob
name: Negretti, Antonio
name: Cirone, Markus A.
name: Calarco, Tommaso
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We propose a two-qubit collisional phase gate that can be implemented with available atom chip technology, and present a detailed theoretical analysis of its performance. The gate is based on earlier phase gate schemes, but uses a qubit state pair with an experimentally demonstrated, very long coherence lifetime. Microwave near-fields play a key role in our implementation as a means to realize the state-dependent potentials required for conditional dynamics. Quantum control algorithms are used to optimize gate performance. We employ circuit configurations that can be built with current fabrication processes, and extensively discuss the impact of technical noise and imperfections that characterize an actual atom chip. We find an overall infidelity compatible with requirements for fault-tolerant quantum computation.
description: 14 pages, 7 figures, 1 table. Published version (minor changes)
Using High-Energy Neutrinos As Cosmic Magnetometers
Creators: name: Bustamante, Mauricio
name: Tamborra, Irene
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Magnetic fields are crucial in shaping the non-thermal emission of the TeV-PeV neutrinos of astrophysical origin seen by the IceCube neutrino telescope. The sources of these neutrinos are unknown, but if they harbor a strong magnetic field, then the synchrotron energy losses of the neutrino parent particles---protons, pions, and muons---leave characteristic imprints on the neutrino energy distribution and its flavor composition. We use high-energy neutrinos as "cosmic magnetometers" to constrain the identity of their sources by placing limits on the strength of the magnetic field in them. We look for evidence of synchrotron losses in public IceCube data: 6 years of High Energy Starting Events (HESE) and 2 years of Medium Energy Starting Events (MESE). In the absence of evidence, we place an upper limit of 10 kG-10 MG (95% C.L.) on the average magnetic field strength of the sources.
description: 5 pages, 2 figures, technical appendices
Sparse Quantized Spectral Clustering
Creators: name: Liao, Zhenyu
name: Couillet, Romain
name: Mahoney, Michael W.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Machine Learning (stat.ML)
subject: Machine Learning (cs.LG)
subject: Spectral Theory (math.SP)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: Given a large data matrix, sparsifying, quantizing, and/or performing other entry-wise nonlinear operations can have numerous benefits, ranging from speeding up iterative algorithms for core numerical linear algebra problems to providing nonlinear filters to design state-of-the-art neural network models. Here, we exploit tools from random matrix theory to make precise statements about how the eigenspectrum of a matrix changes under such nonlinear transformations. In particular, we show that very little change occurs in the informative eigenstructure even under drastic sparsification/quantization, and consequently that very little downstream performance loss occurs with very aggressively sparsified or quantized spectral clustering. We illustrate how these results depend on the nonlinearity, we characterize a phase transition beyond which spectral clustering becomes possible, and we show when such nonlinear transformations can introduce spurious non-informative eigenvectors.
Is time-dependent density functional theory formally exact?
Creators: name: Schirmer, J.
name: Dreuw, A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: The general expectation that, in principle, time-dependent density functional theory (TDDFT) be an exact formulation of the time-evolution of an interacting N-electron system is critically reexamined. It is demonstrated that the previous TDDFT foundation, resting on three theorems by Runge and Gross (RG) [Phys.Rev.Lett.52, 997(1984)], is invalid because undefined phase factors corrupt the RG action integral functionals. Our finding confirms much of a previous analysis by van Leeuwen [Int. J. Mod. Phys. B15, 1969(2001)]. To analyze the RG theorems and other aspects of TDDFT, an utmost simplification of the KS theory is introduced, in which the density is obtained from a single KS equation for one spatial (spin-less) particle. This radical KS formulation allows us to analyze also the concept of KS-type equations derived without a variational principle. We argue that such an approach can reproduce, but not predict the time-development of the exact density of the interacting N-electron system. Besides the issue of the formal exactness of TDDFT, it is shown that both the static and time-dependent KS linear response equations neglect the particle-particle (p-p) and hole-hole (h-h) matrix elements of the perturbing operator. For a local (multiplicative) operator this does not lead to a loss of information due to a remarkable general property of local operators. Accordingly, no logical inconsistency arises here, because DFT requires external potentials to be local.
description: Reason for replacement: Change of content essentially in subsection 5.C, plus minor adaptions in the Appendix, Sec. 1, and Sec. 6
Smart Hatchery Management
Creators: name: Dr Mendu Mounika1, Dr T.Srilatha 2, Dr Mojarla Raghavendar3
Publisher: name: The Science world a Monthly e magazine
Year: 2024

description: Smart hatchery management involves using advanced technology and data driven approaches to optimize the breeding and hatching processes in poultry

·       Implementing automated systems and using Internet of Things (IoT) devices and sensors to monitor environmental conditions like temperature, humidity, air quality, and egg turning frequency in real-time. This data helps in making timely adjustments for optimal hatch rates.
Τοξικοεξάρτηση και θρησκευτική πίστη
Creators: name: Τσαγάνη, Αλεξάνδρα Δημητρίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2014
Subjects: τοξικοεξάρτηση
πίστη
θρησκεία
toxic addiction
faith
religion

description: Η διπλωματική εργασία σχετίζεται με την διερεύνηση της σχέσης μεταξύ τοξικοεξάρτησης και θρησκευτικής πίστης, με σκοπό την ανάδειξη της προσωπικής οπτικής των ανθρώπων που έχουν υπάρξει εξαρτημένοι και την αναζήτηση τρόπων που θα συμβάλλουν στην αποτελεσματικότερη θεραπεία και πρόληψη μέσω μιας πνευματικής διάστασης. Το παρών σύγγραμμα χωρίζεται σε μία εισαγωγή και σε 2 κύριες θεματικές ενότητες: τις θεωρητικές προσεγγίσεις και την διεξαγωγή της εμπειρικής έρευνας. Η εισαγωγή εστιάζει στην ιστορική αναδρομή της εξάρτησης αλλά και στους μέχρι τώρα τρόπους αντιμετώπισης της. Η πρώτη θεματική ενότητα εμπεριέχει μια ερμηνευτική απόπειρα των βασικότερων όρων της εργασίας όπως οι όροι «εξάρτηση» και «πίστη» καθώς επίσης και μια ανασκόπηση της προϋπάρχουσας έρευνας σε διεθνές επίπεδο. Η δεύτερη θεματική ενότητα περιλαμβάνει την διεξαγωγή της εμπειρικής έρευνας με τη χρήση της βιογραφικής μεθόδου, κατά την οποία άτομα που έχουν βιώσει την εξάρτηση καταθέτουν την προσωπική τους εμπειρία. Ακολουθεί στο μέρος αυτό ανάλυση και ερμηνεία δεδομένων και κλείνει με κάποια συμπεράσματα. Καταληκτικά ο επίλογος, συνοψίζει κάποια κύρια σημεία ως απαντήσεις στο αρχικό ερώτημα κατά πόσο η θρησκευτική πίστη συνδέεται εν τέλει με την τοξικοεξάρτηση ενώ στη συνέχεια επιχειρείται η διατύπωση κάποιων ερωτημάτων έτσι όπως προέκυψαν από την έρευνα τα οποία χρήζουν περαιτέρω μελέτης.
description: This diploma thesis presents the research of the relation between toxic addiction and religious faith, with the purpose of showing the personal views of formerly addicted individuals and the research of ways to contribute to more effective treatments and preventive measures through a spiritual angle. This thesis consists of an introduction and two parts: A theoretical approach and the actual empirical research. The introduction focuses on the history of addiction and the current means of treatment. The first part contains an explicative attempt of the most basic terms of this thesis such as the terms “addiction” and “faith” as well as a retrospection of pre existing research on an international level. The second part contains the conduction of the empirical research using the biographical method, in which individuals who have experienced addiction state their own experiences. Analysis and interpretation of the data follow as well as the results. In conclusion the epilogue summarizes a few basic points answering how religious faith is connected with toxic addiction while subsequently a series of questions raised by the research is defined which require further investigation.
Nearly perfect spin-filtering in curved two-dimensional topological insulators
Creators: name: Saffarzadeh, Alireza
name: Kirczenow, George
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The spintronic properties of curved nanostructures derived from two-dimensional topological insulators (2DTI's) are explored theoretically with density functional theory-based (DFT) calculations and tight-binding models. We show that curved geometries make it possible to manipulate electron spins in ways that are not available for planar 2DTI devices. We predict that, unlike planar 2DTI devices, curved 2DTI-related nanostructures can function as highly effective {\em two}-terminal spin filters even in the absence of magnetic fields. We construct a generalization to curved geometries of our previous tight binding model of the wide band gap planar 2DTI bismuthene on SiC. The resulting model, applied to an ideal dome geometry with a free edge, is shown to exhibit quantum spin Hall physics, including spin polarized edge states. The model predicts nearly perfect spin filtering by the dome for a particular two-terminal geometry in the absence of magnetic fields. Our DFT calculations predict a Bi$_{105}$Si$_{105}$H$_{15}$ dome of bismuthene with adsorbed silicon and hydrogen atoms to be stable. Our tight binding model, adjusted to match density of states given by DFT calculations, predicts that the Bi$_{105}$Si$_{105}$H$_{15}$ dome should exhibit quantum spin Hall physics and very effective spin filtering in a two-terminal arrangement.
description: 9 pages, 5 figures
Na-O Anticorrelation and HB. IV. Detection of He-rich and He-poor stellar populations in the globular cluster NGC 6218
Creators: name: Carretta, E.
name: Bragaglia, A.
name: Gratton, R. G.
name: Catanzaro, G.
name: Leone, F.
name: Sabbi, E.
name: Cassisi, S.
name: Claudi, R.
name: D'Antona, F.
name: Francois, P.
name: James, G.
name: Piotto, G.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We used the multifiber spectrograph FLAMES on the ESO Very Large Telescope UT2 to derive atmospheric parameters, metallicities and abundances of O and Na for 79 red giant stars in the Galactic globular cluster NGC 6218 (M 12). We analyzed stars in the magnitude range from about 1 mag below the bump to the tip of the Red Giant Branch. The average metallicity we derive is [Fe/H]=-1.31+/-0.004+/-0.028 dex (random and systematic errors, respectively), with a very small star-to-star scatter (rms=0.033 dex), from moderately high-resolution Giraffe spectra. This is the first extensive spectroscopic abundance analysis in this cluster. Our results indicate that NGC 6218 is very homogeneous as far as heavy elements are concerned. On the other hand, light elements involved in the well known proton-capture reactions of H-burning at high temperature, such as O and Na, show large variations, anticorrelated with each other, at all luminosities along the red giant branch. The conclusion is that the Na-O anticorrelation must be established in early times at the cluster formation. We interpret the variation of Na found near the RGB-bump as the effect of two distinct populations having different bump luminosities, as predicted for different He content. To our knowledge, NGC 6218 is the first GC where such a signature has been spectroscopically detected, when combined with consistent and homogeneous data obtained for NGC 6752 to gain in statistical significance.
description: 15 pages, 10 figures; fig.5 degraded in resolution; tables 2,3,5 available at CDS. Accepted for publication on A&A
The study of calibration for the hybrid pixel detector with single photon counting in HEPS-BPIX
Creators: name: Ding, Ye
name: Li, Zhenjie
name: Wei, Wei
name: Zhang, Jie
name: Li, Hangxu
name: Zhang, Yan
name: Ji, Xiaolu
name: Liu, Peng
name: Chen, Yuanbai
name: Zhu, Kejun
Publisher: name: arXiv
Year: 2020
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: Image and Video Processing (eess.IV)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: The calibration process for the hybrid array pixel detector designed for High Energy Photon Source in China, we called HEPS-BPIX, is presented in this paper. Based on the threshold scanning, the relationship between energy and threshold is quantified for the threshold calibration. For the threshold trimming, the precise algorithm basing on LDAC characteristic and fast algorithm basing on LDAC scanning are proposed in this paper to study the performance of the threshold DACs which will be applied to the pixel. The threshold dispersion has been reduced from 46.28 mV without algorithm to 6.78 mV with the precise algorithm, whereas it is 7.61 mV with fast algorithm. For the temperature from 5 to 60 , the threshold dispersion of precise algorithm varies in the range of about 5.69 mV, whereas it is about 33.21 mV with the fast algorithm which can be re-corrected to 1.49 mV. The measurement results show that the fast algorithm could get the applicable threshold dispersion for a silicon pixel module and take a shorter time, while the precise algorithm could get better threshold dispersion, but time consuming. The temperature dependence of the silicon pixel module noise is also studied to assess the detector working status. The minimum detection energy can be reduced about 0.83 keV at a 20 lower temperature.
Το κατ’ εξακολούθηση έγκλημα στο ουσιαστικό ποινικό δίκαιο
Creators: name: Σίσκος, Παναγιώτης Κωνσταντίνου
Publisher: name: Aristotle University of Thessaloniki
Year: 2014
Subjects: έγκλημα
εξακολούθηση
ποινή
crimen
repeated
penalty

description: Σκοπός της διατριβής ήταν η μελέτη του κατ’ εξακολούθηση εγκλήματος στο ουσιαστικό ποινικό δίκαιο, όπως αυτό περιγράφεται στο άρθρο ενενήντα οκτώ παράγραφοι ένα και δύο του Ποινικού Κώδικα. Εξετάσαμε την ιστορικότητα, την έννοια καθώς και τη δικαιολόγηση της ύπαρξης του κατ’ εξακολούθηση εγκλήματος τόσο στην παράγραφο ένα όσο και στην παράγραφο δύο. Στη συνέχεια παρουσιάσαμε αναλυτικά τη φύση του καθώς και τις πρακτικές συνέπειες όπως ο χρόνος τέλεσης, η παραγραφή, η έγκληση, η συμμετοχή, ο εφαρμοστέος νόμος και ιδίως η δυνατότητα άθροισης των επιμέρους ποσών. Ακόμη αναφερθήκαμε αναλυτικά στις προϋποθέσεις του κατ’ εξακολούθηση εγκλήματος και μας απασχόλησαν ζητήματα απόπειρας και συμμετοχής. Ένα άλλο θέμα που θίξαμε ήταν η στάση της νομολογίας στο κατ’ εξακολούθηση έγκλημα και ιδίως η άρνηση υπαγωγής του στο πεδίο του αναιρετικού ελέγχου. Ασχοληθήκαμε τέλος με ζητήματα διαχρονικού δικαίου.
description: The aim of the present thesis was the study of the repeatedly committing crime in the substantial criminal law, as it is described in the article ninety eight paragraph one and two of the criminal code. We examined the history, the meaning and the cause of the existence of the repeatedly committing crime at the paragraph one and at the paragraph two. Then we presented the nature and the practical consequences as the time of act of crime, the time limit, the complaint, the participation in crime, the law which is applicable and especially the possibility of addition of separated values. Furthermore, we analyzed of the conditions of repeated crime and we examined issues of attempt and participation in this kind of crime. We also examined the jurisprudence regarding to the repeated crime and especially the denial of submit to the cassation control. Another aim of this study was to examine issues regarding to timeless law.
Na-O Anticorrelation and HB. VI. The chemical composition of the peculiar bulge globular cluster NGC 6388
Creators: name: Carretta, E.
name: Bragaglia, A.
name: Gratton, R. G.
name: Momany, Y.
name: Recio-Blanco, A.
name: Cassisi, S.
name: Francois, P.
name: James, G.
name: Lucatello, S.
name: Moehler, S.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present the LTE abundance analysis of high resolution spectra for red giant stars in the peculiar bulge globular cluster NGC 6388. Spectra of seven members were taken using the UVES spectrograph at the ESO VLT2 and the multiobject FLAMES facility. We exclude any intrinsic metallicity spread in this cluster: on average, [Fe/H]=-0.44+/-0.01+/-0.03 dex on the scale of the present series of papers, where the first error bar refers to individual star-to-star errors and the second is systematic, relative to the cluster. Elements involved in H-burning at high temperatures show large spreads, exceeding the estimated errors in the analysis. In particular, the pairs Na and O, Al and Mg are anticorrelated and Na and Al are correlated among the giants in NGC 6388, the typical pattern observed in all galactic globular clusters studied so far. Stars in NGC 6388 shows an excess of alpha-process elements, similar to the one found in the twin bulge cluster NGC 6441. Mn is found underabundant in NGC 6388, in agreement with the average abundance ratio shown by clusters of any metallicity. Abundances of neutron-capture elements are homogeneously distributed within NGC 6388; the [Eu/Fe] ratio stands above the value found in field stars of similar metallicity.
description: 18 pages, 8 figures; table 3 available at CDS. Accepted for publication on A&A
Calibration of calorimetric measurement in a liquid argon time projection chamber
Creators: name: Yang, Tingjun
Publisher: name: arXiv
Year: 2020
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The liquid argon time projection chamber provides high resolution event images and excellent calorimetric resolution for studying neutrino physics and searching for beyond standard model physics. In this article, we review the main physics processes that affect the detector response, including the electronics and field responses, space charge effects, electron attachment to impurities, diffusion and recombination. We describe methods to measure those effects, which are used to calibrate the detector response and convert the measured raw ADC counts to the original energy deposition.
description: 15 pages, 8 figures, submitted to Instruments
Spiral-wave Dynamics Depends Sensitively on nhomogeneities in Mathematical Models of Ventricular Tissue
Creators: name: Shajahan, T K
name: Sinha, Sitabhra
name: Pandit, Rahul
Publisher: name: arXiv
Year: 2006
Subjects: subject: Pattern Formation and Solitons (nlin.PS)
subject: Tissues and Organs (q-bio.TO)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: Every sixth death in industrialised countries occurs because of cardiac arrhythmias like ventricular tachycardia (VT) and ventricular fibrillation (VF). There is growing consensus that VT is associated with an unbroken spiral wave of electrical activation on cardiac tissue but VF with broken waves, spiral turbulence, spatiotemporal chaos and rapid, irregular activation. Thus spiral-wave activity in cardiac tissue has been studied extensively. Nevertheless many aspects of such spiral dynamics remain elusive because of the intrinsically high-dimensional nature of the cardiac-dynamical system. In particular, the role of tissue heterogeneities in the stability of cardiac spiral waves is still being investigated. Experiments with conduction blocks in cardiac tissue yield a variety of results: some suggest that blocks can eliminate VF partially or completely, leading to VT or quiescence, but others show that VF is unaffected by obstacles. We propose theoretically that this variety of results is a natural manifestation of a fractal boundary that must separate the basins of the attractors associated, respectively, with VF and VT. We substantiate this with extensive numerical studies of Panfilov and Luo-Rudy I models, where we show that the suppression of VF depends sensitively on the position, size, and nature of the inhomogeneity.
description: 9 pages, 5 figures.
X-ray sources and shock compression schemes for photoabsorption edge spectroscopy
Creators: name: Dyke, Steven R.
Publisher: name: University of British Columbia
Year: 2009

description: A scheme to probe the temporal evolution of the K-shell photoabsorption edge in shock compressed aluminum is presented in two components. In the first component, a one dimensional hydrodynamic code coupled to a non-local thermodynamic equilibrium calculation is developed and used to model shock propagation and target preheat in laser irradiated CH-Al-Si multilayer targets. Single and multiple shocks are used to create conditions in the aluminum by which density, temperature and ionization effects on K-shell photoabsorption can be isolated. The final result consists of the optimal laser parameters and target designs for creating well characterized plasma states, necessary for accurate atomic modeling of the K-edge. The second component describes the results of x-ray spectra observed from 12 elements across the periodic table, in search of an emission source to backlight the K-edge measurement. Spectral flatness and high emission levels in the region of 1520-1600 eV around the K-edge of aluminum are the criteria for a suitable backlighter. Lead, gold and yttrium seem promising as backlighter sources, and the emission lines observed in silver provide a convenient spectral calibration source.
Existence and uniqueness of solutions for a class of $p$-Laplace equations on a ball
Creators: name: Korman, Philip
Publisher: name: arXiv
Year: 2020
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: For a class of equations generalizing the model case \[ Δ_p u-a(r)u^{p-1}+b(r)u^q=0 \; \; \mbox{in $B$}, \; \; u=0 \; \; \mbox{on $\partial B$}, \] where $B$ is the unit ball in $R^n$, $n \geq 1$, $r=|x|$, $p,q>1$, and $Δ_p$ denotes the $p$-Laplace operator, we give conditions for the existence and uniqueness of positive solution. In case $n=1$, we give a more general result.
description: 17 pages
title: MONOGRAFIA : Investigación, análisis y evaluación de herramientas basadas en Inteligencia Artificial.
title: Investigación, análisis y evaluación de herramientas basadas en Inteligencia Artificial.
titleType: AlternativeTitle
Creators: name: ROJAS, Rosaura Andrea
Publisher: name: Zenodo
Year: 2024

description: El presente trabajo fue confeccionado en el marco de la diplomatura SuperiorInnovación de las TIC en la Educación cuyo objetivo es generar en los estudiantesinvestiguen, analicen y evalúen herramientas basadas en Inteligencia Artificial.Es importante comprender el funcionamiento y aplicaciones en la vida cotidianamediante la recopilación de información sobre las herramientas seleccionadas.Se suma a la investigación el contexto de la Educación Especial para conocer y/oreflexionar sobre las ventajas y limitaciones de las herramientas aplicadas a personascon discapacidad.
Derovatellus lentus
Creators: name: Michat, Mariano C.
name: Alarie, Yves
name: Benetti, Cesar J.
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Dytiscidae
Derovatellus
Derovatellus lentus

description: Derovatellus lentus (Wehncke, 1876)
Diagnosis (compare with figures of Vatellus larvae in Michat & Torres 2005): Instar I. Median branch of nasale widening towards spatulate apex (Fig. 1) (parallel-sided in Vatellus); ratio antennomere 4/antennomere 3> 0.35 (Fig. 2) (<0.35 in Vatellus); primary seta LA1 absent (Fig. 3) (present in Vatellus); distal portion of siphon with a pair of long spiniform seta (Fig. 4) (two pairs in Vatellus).
Instar II. Ratio antennomere 4/antennomere 3> 0.35 (<0.35 in Vatellus); secondary setae on antennomeres 1 and 2 and maxillary palpomere 1 absent (present in Vatellus); posterodorsal secondary setae on coxa absent (present in Vatellus); anterodorsal secondary setae on femur absent (present in Vatellus).
Instar III. Ratio antennomere 4/antennomere 3> 0.35 (Fig. 5) (<0.35 in Vatellus); secondary setae on antennomeres 1 and 2 and maxillary palpomere 1 absent (present in Vatellus); premental seta LA1 absent (present in Vatellus); anteroventral secondary setae on coxa absent (Fig. 7) (present in Vatellus); femur with 16–22 spiniform secondary setae (Figs 7–8) (33–55 in Vatellus); tarsal natatory setae restricted to basal half (Fig. 8) (extending to distal half in Vatellus); dorsal surface of abdominal segment VIII (excluding siphon) with six spiniform secondary setae (Fig. 6) (more than 15 in Vatellus).
Description, instar III. As instar II (Michat & Torres 2011) except for the following features:
Color: Somewhat darker in general, siphon testaceous only on distal tenth.
Body: Measurements and ratios that characterize the body shape are shown in Table 1.
Head (Fig. 5): Median branch of nasale parallel sided up to spatulate apex, anterior margin with 43–45 spatulate setae (six of them longer) directed downward. Antenna. A2 slightly shorter than A3. Maxilla. MP2 considerably shorter than MP1.
Thorax: Spiracles present on mesothorax. Metatergite with sagittal line.
Abdomen (Fig. 6): Spiracles present on segments I–VII. Sclerite VIII with anterior transverse carina. Siphon extremely long.
Chaetotaxy: Lateral margin of PA with 4–6 spiniform secondary setae; each lateral branch of nasale with 5 secondary setae (3 spiniform, strongly developed, and 2 setiform) (Fig. 5); secondary leg setation detailed in Table 2 and Figs 7–8.
Habitat. The specimens were taken from a roadside pond at road 40 near Laguna Iberá park ranger office, 28°32’48.65’’S, 57°11’48.02’’W (see Google Earth 2024). The sampling site (Fig. 9) was mostly exposed to insolation, with muddy bottom, relatively high turbidity, and abundant emergent vegetation.
description: Published as part of Michat, Mariano C., Alarie, Yves & Benetti, Cesar J., 2024, Description of the mature larva of Derovatellus lentus (Coleoptera: Dytiscidae), pp. 145-150 in Zootaxa 5492 (1) on page 146, DOI: 10.11646/zootaxa.5492.1.10, http://zenodo.org/record/13211581
Quantum criticality and multiple crossing points in the magnetoresistance of thin TiN-films
Creators: name: Kronfeldner, K.
name: Baturina, T. I.
name: Strunk, C.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We have measured $R(T,B)$ of a TiN thin-film very close to the disorder-driven superconductor-insulator transition but still superconducting at zero field and low temperatures. In a magnetic field we find three distinct crossing point of the magnetoresistance isotherms occur at magnetic fields $B_{cX}$ in three different temperature regions. Each crossing point in $R(T,B)$ corresponds to a plateau in $R(T,B_{cX})$. We systematically study the evolution of these crossing point near the disorder-induced superconductor/insulator transition, identify the most promising candidate for a quantum phase transition, and provide estimates for the two critical exponents $z$ and $ν$.
description: 5 pages, 5 figures plus supplement
Symmetry breaking patterns, tricriticalities and quadruple points in quantum Rabi model with bias and nonlinear interaction
Creators: name: Ying, Zu-Jian
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Quantum Rabi model (QRM) is fascinating not only because of its broad relevance and but also due to its few-body quantum phase transition. In practice both the bias and the nonlinear coupling in QRM are important controlling parameters in experimental setups. We study the interplay of the bias and the nonlinear interaction with the linear coupling in the ground state which exhibits various patterns of symmetry breaking and different orders of transitions. Several situations of tricriticality are unveiled in the low frequency limit and at finite frequencies. We find that the full quantum-mechanical effect leads to novel transitions, tricriticalities and quadruple points, which are much beyond the semiclassical picture. We clarify the underlying mechanisms by analyzing the energy competitions and the essential changeovers of the quantum states, which enables us to extract most analytic phase boundaries.
description: 19 pages, 15 figures
Optical bandgap thermometry in molecular beam epitaxy
Creators: name: Johnson, Shane R
Publisher: name: University of British Columbia
Year: 2009

description: The temperature dependence of the optical absorption edge (Urbach edge) is measured in semi-insulating and n-type (n = 2*10¹⁸ cm⁻³) GaAs from room temperature to 700 °C. The characteristic energy of the exponential absorption edge is found to increase linearly with temperature, from 7.5 meV at room temperature to 12.4 meV at 700 °C, for semi-insulating GaAs. The temperature dependent part of the width of the Urbach edge for semiinsulating GaAs and InP is smaller than predicted by the standard theory where the width of the edge is proportional to the phonon population. The part of the width not characteristic of the phonon occupation number in semi-insulating GaAs and InP, is attributed to static fluctuations in the band edges due to point defects. The absorption edge in n-type GaAs and InP is broadened by fluctuations in the band edge caused by the electric fields and the strain fields of the ionized donor impurities. An optical method for measuring the temperature of a substrate material with a temperature dependent bandgap is presented. In this method the substrate is illuminated with a broad spectrum lamp; the bandgap is determined from the spectrum of the diffusely scattered light. Light with energies below the bandgap is transmitted through the substrate and reflected from the back surface of the substrate while light with energies above the bandgap is absorbed by the substrate. The front surface of the substrate is polished and its back surface is either rough or polished with a scatterer behind the substrate. The reflection of light from the front surface is specular and the light diffusely reflected at the back of the substrate is detected in a non-specular location. Substrate temperature is determined from the wavelength of the onset of the non-specular reflection. An algorithm is presented that utilizes the position and the width of the knee in the diffuse reflectance spectrum as a reference point for the onset of transparency and hence temperature of the substrate. A model is developed that relates the onset of transparency of the substrate to the optical bandgap and the width of the absorption edge of the substrate. From this model the sensitivity and absolute accuracy of the measurement for differences in substrate thickness, back surface texture, and conductivity is determined. The temperature sensitivity and reproducibility of the diffuse reflectance technique is better than 1°C when using GaAs substrates. Using the diffuse reflectance technique the temperature of GaAs substrates is profiled in a molecular-beam-epitaxy system with a spatial resolution of 3 mm and a thermal resolution of 0.4 °C. The effects of substrate doping, back surface textures, thermal contact to holder, and a pyrolytic boron nitride diffuser plate, on the temperature uniformity of radiatively heated substrates is explored. Both positive and negative curvatures are observed in the temperature profiles.
Gravitational decoherence: a non relativistic spin 1/2 fermionic model
Creators: name: Asprea, Lorenzo
name: Gasbarri, Giulio
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In a previous work [arXiv1905.01121] we have derived a quantum master equation for the dynamics of a scalar bosonic particle interacting with a weak, stochastic and classical gravitational field. As standard matter is made of fermions, such an equation should be suitably extended to describe more relevant experimental situations. Here we derive a non relativistic model for the gravitational decoherence of spin 1/2 particles. We enrich the treatment by considering also a coupling with an external classical electromagnetic field. We comment on the differences with the scalar bosonic model and we describe the regimes in which they become negligible.
description: 16 Pages. arXiv admin note: text overlap with arXiv:1905.01121