cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The energy source of the filaments around the giant galaxy NGC1275
Creators: name: Fabian, A. C.
name: Sanders, J. S.
name: Williams, R. J. R.
name: Lazarian, A.
name: Ferland, G. J.
name: Johnstone, R. M.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The brightest galaxy in the nearby Perseus cluster, NGC1275, is surrounded by a network of filaments. These were first observed through their Halpha emission but are now known to have a large molecular component with a total mass approaching 10^11Msun of gas. The filaments are embedded in hot intracluster gas and stretch over 80 kpc. They have an unusual low excitation spectrum which is well modelled by collisional heating and ionization by secondary electrons. Here we note that the surface radiative flux from the outer filaments is close to the energy flux impacting on them from particles in the hot gas. We propose that the secondary electrons within the cold filaments, which excite the observed submillimetre through UV emission, are due to the hot surrounding gas efficiently penetrating the cold gas through reconnection diffusion. Some of the soft X-ray emission seen from the filaments is then due to charge exchange, although this is insufficient to account for all the observed X-ray flux. The filaments are complex with multiphase gas. Interpenetration of hot and cold gas leads to the filaments growing in mass, at a rate of up to 100Msunpyr. The lack of soft X-ray cooling emission in cool core clusters is then due to the non-radiative cooling of hot gas on mixing with cold gas around and within the central galaxy.
description: 7 pages, 4 figures, MNRAS in press
Upscaling Uncertainty with Dynamic Discrepancy for a Multi-Scale Carbon Capture System
Creators: name: Bhat, K. Sham
name: Mebane, David S.
name: Mahapatra, Priyadarshi
name: B. Storlie, Curtis
Publisher: name: Taylor & Francis
Year: 2018
Subjects: subject: Medicine
subject: Genetics
subject: FOS: Biological sciences
subject: Neuroscience
subject: Pharmacology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics
subject: Plant Biology
subject: Computational Biology

description: Uncertainties from model parameters and model discrepancy from small-scale models impact the accuracy and reliability of predictions of large-scale systems. Inadequate representation of these uncertainties may result in inaccurate and overconfident predictions during scale-up to larger systems. Hence, multiscale modeling efforts must accurately quantify the effect of the propagation of uncertainties during upscaling. Using a Bayesian approach, we calibrate a small-scale solid sorbent model to thermogravimetric (TGA) data on a functional profile using chemistry-based priors. Crucial to this effort is the representation of model discrepancy, which uses a Bayesian smoothing splines (BSS-ANOVA) framework. Our uncertainty quantification (UQ) approach could be considered intrusive as it includes the discrepancy function within the chemical rate expressions; resulting in a set of stochastic differential equations. Such an approach allows for easily propagating uncertainty by propagating the joint model parameter and discrepancy posterior into the larger-scale system of rate expressions. The broad UQ framework presented here could be applicable to virtually all areas of science where multiscale modeling is used. Supplementary materials for this article are available online.
Dust in the Interplanetary Medium
Creators: name: Mann, Ingrid
name: Czechowski, Andrzej
name: Meyer-Vernet, Nicole
name: Zaslavsky, Arnaud
name: Lamy, Herve
Publisher: name: arXiv
Year: 2010
Subjects: subject: Space Physics (physics.space-ph)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: The mass density of dust particles that form from asteroids and comets in the interplanetary medium of the solar system is, near 1 AU, comparable to the mass density of the solar wind. It is mainly contained in particles of micrometer size and larger. Dust and larger objects are destroyed by collisions and sublimation and hence feed heavy ions into the solar wind and the solar corona. Small dust particles are present in large number and as a result of their large charge to mass ratio deflected by electromagnetic forces in the solar wind. For nano dust particles of sizes 1 - 10 nm, recent calculations show trapping near the Sun and outside from about 0.15 AU ejection with velocities close to solar wind velocity. The fluxes of ejected nano dust are detected near 1AU with the plasma wave instrument onboard the STEREO spacecraft. Though such electric signals have been observed during dust impacts before, the interpretation depends on several different parameters and data analysis is still in progress.
description: 12 pages, 8 figures, accepted for publication in Plasma Physics and Controlled Fusion, special issue 37th EPS Conference on Plasma Physics
Nonparametric Bayes Modeling of Populations of Networks
Creators: name: Durante, Daniele
name: Dunson, David B.
name: Vogelstein, Joshua T.
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Genetics
subject: FOS: Biological sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: 80699 Information Systems not elsewhere classified
subject: FOS: Computer and information sciences
subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics

description: Replicated network data are increasingly available in many research fields. For example, in connectomic applications, interconnections among brain regions are collected for each patient under study, motivating statistical models which can flexibly characterize the probabilistic generative mechanism underlying these network-valued data. Available models for a single network are not designed specifically for inference on the entire probability mass function of a network-valued random variable and therefore lack flexibility in characterizing the distribution of relevant topological structures. We propose a flexible Bayesian nonparametric approach for modeling the population distribution of network-valued data. The joint distribution of the edges is defined via a mixture model that reduces dimensionality and efficiently incorporates network information within each mixture component by leveraging latent space representations. The formulation leads to an efficient Gibbs sampler and provides simple and coherent strategies for inference and goodness-of-fit assessments. We provide theoretical results on the flexibility of our model and illustrate improved performance—compared to state-of-the-art models—in simulations and application to human brain networks. Supplementary materials for this article are available online.
Extreme events on complex networks
Creators: name: Kishore, Vimal
name: Santhanam, M. S.
name: Amritkar, R. E.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Social and Information Networks (cs.SI)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: We study the extreme events taking place on complex networks. The transport on networks is modelled using random walks and we compute the probability for the occurance and recurrence of extreme events on the network. We show that the nodes with smaller number of links are more prone to extreme events than the ones with larger number of links. We obtain analytical estimates and verify them with numerical simulations. They are shown to be robust even when random walkers follow shortest path on the network. The results suggest a revision of design principles and can be used as an input for designing the nodes of a network so as to smoothly handle an extreme event.
description: 5 pages, 4 figures
Άγιον Όρος: Όψεις της ιστορίας της Αθωνικής Πολιτείας (19ος -20ός αιώνας)
Creators: name: Στίγκα, Βασιλική
Publisher: name: Πανεπιστήμιο Πελοποννήσου
Year: 2024
Subjects: subject: Άθως (Ελλάδα) -- Ιστορία -- 19ος αιώνας
subject: Άθως (Ελλάδα) -- Ιστορία -- 20ός αιώνας
subject: Άγιον Όρος
subject: Καταστατικός Χάρτης
subject: Αυτοδιοίκητο
subject: Συνθήκη Των Σεβρών
subject: Ευρωπαϊκή Ένωση
subject: Mount Athos
subject: Charter
subject: Self-Government
subject: Treaty Of Sevres
subject: European Union

description: H συγκεκριμένη διατριβή μεταπτυχιακής ειδίκευσης αποτελεί μια προσπάθεια να καταγραφούν κάποιες σημαντικές και αθέατες πτυχές της πρόσφατης ιστορίας του Αγίου Όρους και, συγκεκριμένα, γεγονότα που διαδραματίστηκαν στον 19ο και στον 20ό αιώνα. Το θέμα της, βέβαια, δεν εξαντλήθηκε, γιατί προφανώς υπάρχουν κι άλλες ανεξερεύνητες πηγές που θα μπορούσαν να κάνουν πιο ενδελεχή την έρευνα. Ωστόσο παρουσιάστηκαν αντικειμενικά και εμπεριστατωμένα τα γεγονότα και τα πρόσωπα που έπαιξαν κομβικό ρόλο στην εδραίωση του Αγίου Όρους ως αναπόσπαστο τμήμα της ελληνικής επικράτειας, αλλά και των διπλωματικών εξελίξεων που παγίωσαν το ιδιόμορφο καθεστώς της Αθωνικής Πολιτείας στο διεθνές σκηνικό.
New cooling sequences for old white dwarfs
Creators: name: Renedo, Isabel
name: Althaus, Leandro G.
name: Bertolami, Marcelo M. Miller
name: Romero, Alejandra D.
name: Corsico, Alejandro H.
name: Rohrmann, Rene D.
name: Garcia-Berro, Enrique
Publisher: name: arXiv
Year: 2010
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present full evolutionary calculations appropriate for the study of hydrogen-rich DA white dwarfs. This is done by evolving white dwarf progenitors from the zero age main sequence, through the core hydrogen burning phase, the helium burning phase and the thermally pulsing asymptotic giant branch phase to the white dwarf stage. Complete evolutionary sequences are computed for a wide range of stellar masses and for two different metallicities: Z=0.01, which is representative of the solar neighborhood, and Z=0.001, which is appropriate for the study of old stellar systems, like globular clusters. During the white dwarf cooling stage we compute self-consistently the phase in which nuclear reactions are still important, the diffusive evolution of the elements in the outer layers and, finally, we also take into account all the relevant energy sources in the deep interior of the white dwarf, like the release of latent heat and the release of gravitational energy due to carbon-oxygen phase separation upon crystallization. We also provide colors and magnitudes for these sequences, based on a new set of improved non-gray white dwarf model atmospheres, which include the most up-to-date physical inputs like the Lyman alpha quasi-molecular opacity. The calculations are extended down to an effective temperature of 2,500 K. Our calculations provide a homogeneous set of evolutionary cooling tracks appropriate for mass and age determinations of old DA white dwarfs and for white dwarf cosmochronology of the different Galactic populations.
description: 36 pages, 9 figures. Accepted for publication in The Astrophysical Journal
title: Στοχαστικές παροχές σύνταξης από ασφαλιστικές εταιρείες με περιουσιακά στοιχεία που υπόκειντο σε αβεβαιότητα τύπου κίνησης Brown
title: Stochastic pension funding from firms with risky assets under Brownian uncertainty
titleType: AlternativeTitle
Creators: name: Νάκη, Χριστίνα
Publisher: name: Πανεπιστήμιο Πειραιώς
Year: 2024
Subjects: subject: Συνταξιοδοτικά σχήματα
subject: Στοχαστικές διαδικασίες
subject: Κίνηση Brown

description: Στην εργασία αυτή, θα μελετηθούν και θα παρουσιαστούν διάφοροι τύποι συνταξιοδοτικών σχημάτων σχετικά με την κατανομή του κινδύνου. Πιο δημοφιλή εξ αυτών, είναι τα συνταξιοδοτικά σχήματα καθορισμένων παροχών (Defined Benefit - DBP) και τα καθορισμένων εισφορών (Defined Contribution - DCP). Ένας τρόπος μέσω του οποίου μπορεί να γίνει η αποτίμηση και σύγκρισή μεταξύ τους είναι η χρήση της κίνησης Brown, ενός μαθηματικού μοντέλου το οποίο χρησιμοποιείται στα χρηματοοικονομικά για την ανάλυση και τον σχεδιασμό οικονομικών μοντέλων και, στην περίπτωσή μας, συνταξιοδοτικών προγραμμάτων. Στην παρούσα εργασία, θα γίνει ανάλυση στα δύο συνταξιοδοτικά σχήματα (καθορισμένων εισφορών και καθορισμένων παροχών) προκειμένου να διαπιστωθεί πώς μπορεί να οριστεί και να καθοριστεί το βέλτιστο χαρτοφυλάκιο. Η ανάλυσή τους θα βασιστεί σε δύο εργασίες που επιχειρούν βαθύτερες μαθηματικές προσεγγίσεις και θα συμπληρώσει την παρουσίαση των ειδών συνταξιοδοτικών προγραμμάτων και της ανάλυσης των στοχαστικών διαδικασιών και σχετικών μαθηματικών εννοιών που θα προηγηθεί στα πρώτα θεωρητικά κεφάλαια της εργασίας. Τέλος, θα παρουσιαστούν κάποιες χρήσιμες παρατηρήσεις και συμπεράσματα της μεθόδου.
Compactons in Nonlinear Schrödinger Lattices with Strong Nonlinearity Management
Creators: name: Abdullaev, F. Kh.
name: Kevrekidis, P. G.
name: Salerno, M.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Pattern Formation and Solitons (nlin.PS)
subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: The existence of compactons in the discrete nonlinear Schrödinger equation in the presence of fast periodic time modulations of the nonlinearity is demonstrated. In the averaged DNLS equation the resulting effective inter-well tunneling depends on modulation parameters {\it and} on the field amplitude. This introduces nonlinear dispersion in the system and can lead to a prototypical realization of single- or multi-site stable discrete compactons in nonlinear optical waveguide and BEC arrays. These structures can dynamically arise out of Gaussian or compactly supported initial data.
description: 4 pages, 4 figures
Nonparametric Bayes Modeling of Populations of Networks
Creators: name: Durante, Daniele
name: B. Dunson, David
name: T. Vogelstein, Joshua
Publisher: name: Taylor & Francis
Year: 2016
Subjects: subject: Genetics
subject: FOS: Biological sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: 80699 Information Systems not elsewhere classified
subject: FOS: Computer and information sciences
subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics

description: Replicated network data are increasingly available in many research fields. For example, in connectomic applications, interconnections among brain regions are collected for each patient under study, motivating statistical models which can flexibly characterize the probabilistic generative mechanism underlying these network-valued data. Available models for a single network are not designed specifically for inference on the entire probability mass function of a network-valued random variable and therefore lack flexibility in characterizing the distribution of relevant topological structures. We propose a flexible Bayesian nonparametric approach for modeling the population distribution of network-valued data. The joint distribution of the edges is defined via a mixture model that reduces dimensionality and efficiently incorporates network information within each mixture component by leveraging latent space representations. The formulation leads to an efficient Gibbs sampler and provides simple and coherent strategies for inference and goodness-of-fit assessments. We provide theoretical results on the flexibility of our model and illustrate improved performance—compared to state-of-the-art models—in simulations and application to human brain networks. Supplementary materials for this article are available online.
Priority Based Dynamic Round Robin (PBDRR) Algorithm with Intelligent Time Slice for Soft Real Time Systems
Creators: name: Mohanty, Rakesh
name: Behera, H. S.
name: Patwari, Khusbu
name: Dash, Monisha
name: Prasanna, M. Lakshmi
Publisher: name: arXiv
Year: 2011
Subjects: subject: Operating Systems (cs.OS)
subject: FOS: Computer and information sciences

description: In this paper, a new variant of Round Robin (RR) algorithm is proposed which is suitable for soft real time systems. RR algorithm performs optimally in timeshared systems, but it is not suitable for soft real time systems. Because it gives more number of context switches, larger waiting time and larger response time. We have proposed a novel algorithm, known as Priority Based Dynamic Round Robin Algorithm(PBDRR),which calculates intelligent time slice for individual processes and changes after every round of execution. The proposed scheduling algorithm is developed by taking dynamic time quantum concept into account. Our experimental results show that our proposed algorithm performs better than algorithm in [8] in terms of reducing the number of context switches, average waiting time and average turnaround time.
description: 5 pages
The Hamming Ball Sampler
Creators: name: K. Titsias, Michalis
name: Yau, Christopher
Publisher: name: Taylor & Francis
Year: 2016
Subjects: subject: Biophysics
subject: Space Science
subject: Genetics
subject: FOS: Biological sciences
subject: Biotechnology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Immunology
subject: FOS: Clinical medicine
subject: 69999 Biological Sciences not elsewhere classified
subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics
subject: Cancer
subject: Inorganic Chemistry
subject: FOS: Chemical sciences

description: We introduce the Hamming ball sampler, a novel Markov chain Monte Carlo algorithm, for efficient inference in statistical models involving high-dimensional discrete state spaces. The sampling scheme uses an auxiliary variable construction that adaptively truncates the model space allowing iterative exploration of the full model space. The approach generalizes conventional Gibbs sampling schemes for discrete spaces and provides an intuitive means for user-controlled balance between statistical efficiency and computational tractability. We illustrate the generic utility of our sampling algorithm through application to a range of statistical models. Supplementary materials for this article are available online.
Αλέξανδρος Δελμούζος (1880-1956). Η ζωή, το έργο και η εποχή του
Creators: name: Γιαννακοπούλου, Αγγελική
Publisher: name: Πανεπιστήμιο Πελοποννήσου
Year: 2024
Subjects: subject: Δελμούζος , Αλέξανδρος Π. , 1880-1956
subject: Εκπαιδευτικοί -- Ελλάδα -- Βιογραφία
subject: Εκπαίδευση -- Ελλάδα -- Ιστορία -- 20ός αιώνας
subject: Ελληνική γλώσσα, Νέα -- Μελέτη και διδασκαλία -- Ελλάδα -- Ιστορία -- 20ός αιώνας
subject: Α. Δελμούζος
subject: Παιδαγωγική
subject: Σχολείο Εργασίας
subject: Εκπαιδευτική Μεταρρύθμιση
subject: Γλωσσικό Ζήτημα
subject: Δημοτική
subject: Καθαρεύουσα
subject: Εκπαιδευτικός Όμιλος
subject: A. Delmouzos
subject: Pedagogy
subject: Work School
subject: Educational Reform
subject: Language Question
subject: Vernacular Language
subject: Purist Greek Language
subject: Educational Association

description: Η εργασία αυτή πραγματεύεται την προσωπικότητα του Αλέξανδρου Δελμούζου ο οποίος υπήρξε κύριος εκπρόσωπος του δημοτικισμού στην εκπαίδευση. Ο ίδιος είχε ιδρύσει και το Πειραματικό σχολείο του Αριστοτελείου Πανεπιστημίου Θεσσαλονίκης. Ο Δελμούζος ήταν μία φυσιογνωμία η οποία όσον αφορά στα ζητήματα της εκπαίδευσης κατηγορήθηκε έντονα, ενώ την ίδια στιγμή η συμβολή του προς την κατεύθυνση αυτή εκθειάσθηκε σε μεγάλο βαθμό.
Ο υβριδικός πόλεμος και το διεθνές δίκαιο : νομικές προκλήσεις και προοπτικές
Creators: name: Αθανασοπούλου, Δήμητρα
Publisher: name: Πανεπιστήμιο Πειραιώς
Year: 2024
Subjects: subject: Διεθνές δίκαιο
subject: Υβριδικός πόλεμος
subject: Υβριδικές απειλές
subject: Διεθνής ασφάλεια
subject: Κρατικοί δρώντες
subject: Μη κρατικοί δρώντες

description: Οι δυναμικές του διεθνούς περιβάλλοντος διαμορφώνονται κυρίως από τις σχέσεις μεταξύ των κρατών. Με τη σειρά τους, οι εν λόγω σχέσεις καθορίζονται κυρίως από την ισχύ που κατέχει έκαστο κράτος, καθώς και από τις σχηματιζόμενες συμμαχίες. Σε όλα τούτα, έρχεται να προστεθεί το Διεθνές Δίκαιο, η ενίσχυση και ο καθοριστικός ρόλος του οποίου εμπεδώθηκε μετά τον Β’ Παγκόσμιο Πόλεμο. Σε μια προσπάθεια αποκλιμάκωσης των πολέμων και των καταστροφικών συνεπειών του, οι κανόνες του Διεθνούς Δικαίου σκόπευαν στην θέση ορισμένων απαράβατων κανόνων και αρχών προκειμένου επικρατεί η ειρήνη και κατ’ επέκταση η ειρηνική επίλυση των κρατικών διαφορών, με έσχατη την καταφυγή στα όπλα σε περίπτωση που κράτος δεχτεί ένοπλη επίθεση. Έκτοτε όμως το διεθνές τοπίο έχει αλλάξει, νέοι κίνδυνοι – μη στρατιωτικού χαρακτήρα, αλλά εξίσου καταστροφικοί- έχουν αναδυθεί, νέοι παίκτες -μη κρατικοί- κλυδωνίζουν την διεθνή ασφάλεια, καθώς και μη συμβατικοί τρόποι διεξαγωγής εχθρικών επιχειρήσεων ολοένα και περισσότερο λαμβάνουν χώρα. Ως εκ τούτου, στην προσπάθεια να εξηγηθούν όλα τα ανωτέρω, σύγχρονοι όροι όπως «υβριδικές απειλές» και «υβριδικός πόλεμος» έχουν κάνει την εμφάνισή τους. Το χαρακτηριστικότερο γνώρισμα αυτών των εννοιών έγκειται στο ότι διαρκώς δοκιμάζουν τα όρια αρχών και κανόνων, θέτοντας εν αμφιβόλω την αξία και αποτελεσματικότητά τους. Αυτό ακριβώς έχουν προκαλέσει και στους διεθνείς κανόνες περί απαγόρευσης χρήσης της βίας και της νόμιμης άμυνας, εγείροντας συνέχεια το ερώτημα για το αν είναι εφικτό να ενταχθούν στο ρυθμιστικό τους πεδίο. Αυτό αποτελεί και το κεντρικό ζήτημα της παρούσας εργασίας, το οποίο θα επιχειρηθεί να προσεγγιστεί και να αναλυθεί.
Bootstrap inference of matching estimators for average treatment effects*
Creators: name: Otsu, Taisuke
name: Rai, Yoshiyasu
Publisher: name: Taylor & Francis
Year: 2016
Subjects: subject: Medicine
subject: Biotechnology
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics
subject: Marine Biology
subject: Science Policy
subject: Plant Biology

description: Abadie and Imbens (2008) showed that the naive bootstrap is not asymptotically valid for a matching estimator of the average treatment effect with a fixed number of matches. In this article, we propose asymptotically valid inference methods for matching estimators based on the weighted bootstrap. The key is to construct bootstrap counterparts by resampling based on certain linear forms of the estimators. Our weighted bootstrap is applicable for the matching estimators of both the average treatment effect and its counterpart for the treated population. Also, by incorporating a bias correction method in Abadie and Imbens (2011), our method can be asymptotically valid even for matching based on a vector of covariates. A simulation study indicates that the weighted bootstrap method is favorably comparable with the asymptotic normal approximation by Abadie and Imbens (2006). As an empirical illustration, we apply the proposed method to the National Supported Work data.
Fermionic current densities induced by magnetic flux in a conical space with a circular boundary
Creators: name: de Mello, E. R. Bezerra
name: Bezerra, V. B.
name: Saharian, A. A.
name: Bardeghyan, V. M.
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We investigate the vacuum expectation value of the fermionic current induced by a magnetic flux in a (2+1)-dimensional conical spacetime in the presence of a circular boundary. On the boundary the fermionic field obeys MIT bag boundary condition. For irregular modes, a special case of boundary conditions at the cone apex is considered, when the MIT bag boundary condition is imposed at a finite radius, which is then taken to zero. We observe that the vacuum expectation values for both charge density and azimuthal current are periodic functions of the magnetic flux with the period equal to the flux quantum whereas the expectation value of the radial component vanishes. For both exterior and interior regions, the expectation values of the current are decomposed into boundary-free and boundary-induced parts. For a massless field the boundary-free part in the vacuum expectation value of the charge density vanishes, whereas the presence of the boundary induces nonzero charge density. Two integral representations are given for the boundary-free part in the case of a massive fermionic field for arbitrary values of the opening angle of the cone and magnetic flux. The behavior of the induced fermionic current is investigated in various asymptotic regions of the parameters. At distances from the boundary larger than the Compton wavelength of the fermion particle, the vacuum expectation values decay exponentially with the decay rate depending on the opening angle of the cone. We make a comparison with the results already known from the literature for some particular cases.
description: 34 pages, 6 figures
Semitransparent pistons
Creators: name: Morales, P.
name: Kirsten, K.
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We consider semitransparent pistons in the presence of extra dimensions. It is shown that the piston is always attracted to the closest wall irrespective of details of the geometry and topology of the extra dimensions and of the cross section of the piston. Furthermore, we evaluate the zeta regularized determinant for this configuration.
description: To appear in the proceedings of 9th Conference on Quantum Field Theory under the Influence of External Conditions (QFEXT 09): Devoted to the Centenary of H. B. G. Casimir, Norman, Oklahoma, 21-25 Sep 2009
Mobile edge cloud : computation scheduling and caching
Creators: name: Tanzil, S M Shahrear
Publisher: name: University of British Columbia
Year: 2018

description: Mobile edge cloud has been proposed to accommodate computational intensive application on mobile devices without augmenting their computational capacities and to combat with the growing traffic volume in the network. The main concept of mobile edge cloud is to bring computation and storage near to the end users, serving users’ requests locally, and reducing wide area network latency. Although mobile edge cloud improves network performance and users’ quality of experience, it brings several challenges due to possessing limited resources. The unified focus of the thesis is to design mechanisms for mobile edge cloud to maximally exploiting the computation and storage resources at the edge of the network to minimize network traffic and latency. In the first part of the thesis, we design a distributed computational resource sharing mechanism where femtocell access points (FAPs) share their resources with neighbouring FAPs and form local clouds. The aim of forming such local femto-clouds is to serve computational requests locally, reducing the data transfer delay and improving users’ quality of experience. The resource sharing problem is formulated as an optimization problem and a myopic procedure is presented that enables FAPs to collaboratively find its solution in a distributed fashion. In the second and third part of the thesis, we focus on designing caching mechanisms for mobile edge network. It has been illustrated that almost 60% of the data traffic results from the asynchronous requests for some popular content. By caching those few popular content at the edge of the network, demand for the same content can be served locally, resulting in a reduction in the data traffic volume and downloading delay in the network. In the second part of the thesis, we construct a caching scheme that accounts for content popularity prediction and properties of the network (e.g. cache size, bandwidth, and network topology). The caching scheme is further extended in the final part of the thesis that includes content popularity prediction errors and routing mechanism in the caching decision. For the caching schemes mixed-integer linear programming is used to compute where to cache the content in the network to minimize content downloading delay.
Civic monitoring for environmental enforcement. Exploring the potential and use of evidence gathered by lay people
Creators: name: Berti Suman, Anna
Publisher: name: Zenodo
Year: 2023

description: Civic monitoring is a powerful source of evidence for law enforcement. Action in court through evidence gathered by lay people (i.e. people not officially responsible for doing so) can signal unaddressed demands.The emersion of a spontaneous civic environmental monitoring initiative indicates the potential presence of distrust but can also be an occasion for cooperation between citizens and authorities on a shared issue.Civic environmental monitoring is also contributing to the provision of public services. Embracing these practices can be an opportunity for authorities to make governance models more inclusive and responsive.Performing civic environmental monitoring should be recognised as a rightful contribution to official enforcement of environmental law
Effect of dietary protein source on piglet meat quality characteristics
Creators: name: Simitzis, Panagiotis E
name: Papadomichelakis, George
name: Tsiplakou, Eleni
name: Theodorou, George
name: Zervas, George
name: Politis, Ioannis
Publisher: name: Department of Health, Animal Science and Food Safety (VESPA)
Year: 2014
Subjects: soybean meal, whey proteins, piglets, oxidation, meat quality

description: An experiment was conducted to examine the effects of different dietary protein sources (soybean meal vs whey protein) on piglet meat quality characteristics. Eighteen castrated male Large White × Duroc × Landrace piglets were randomly assigned to 2 groups. Piglets were kept in individual metabolic cages and fed ad libitum over a period of 38 days the following 2 diets: diet SB, which was formulated to meet the nutrient requirements of piglets using soybean meal as the main crude protein source and diet WP, where SB was totally replaced by a mixture of whey proteins on equal digestible energy and crude protein basis. At the end of the experiment, piglets were weighed and slaughtered. After overnight chilling, samples of Longissimus dorsi muscle were taken and were used for meat quality measurements.

No significant differences were observed in the values of pH, colour, water holding capacity, shear force and intramuscular fat content of L. dorsi muscle between the dietary treatments. Measurement of lipid oxidation values showed that dietary supplementation with different protein sources did not influence meat antioxidant properties during refrigerated storage. The SB piglets had lower 14:0 (P<0.01) and higher 18:3n-3 (P<0.001) levels in intramuscular fat in comparison with WP piglets. However, these changes were attributed to background differences in the dietary FA profile and not to a direct protein source effect. The results of this preliminary study indicate that the examined dietary protein sources (soybean meal or whey protein) do not have a significant effect on meat quality characteristics of piglets.
description: International Journal of Health, Animal Science and Food Safety, Vol 1, No 1 (2014)
Bounded and unbounded polynomials and multilinear forms: Characterizing continuity
Creators: name: Gámez-Merino, José L.
name: Muñoz-Fernández, Gustavo A.
name: Pellegrino, Daniel
name: Seoane-Sepúlveda, Juan B.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Functional Analysis (math.FA)
subject: FOS: Mathematics

description: In this paper we prove a characterization of continuity for polynomials on a normed space. Namely, we prove that a polynomial is continuous if and only if it maps compact sets into compact sets. We also provide a partial answer to the question as to whether a polynomial is continuous if and only if it transforms connected sets into connected sets. These results motivate the natural question as to how many non-continuous polynomials there are on an infinite dimensional normed space. A problem on the \emph{lineability} of the sets of non-continuous polynomials and multilinear mappings on infinite dimensional normed spaces is answered.
description: 8 pages
Statistical Tests for Large Tree-Structured Data
Creators: name: Bharath, Karthik
name: Kambadur, Prabhanjan
name: Dey, Dipak. K.
name: Rao, Arvind
name: Baladandayuthapani, Veerabhadran
Publisher: name: Taylor & Francis
Year: 2017
Subjects: subject: Medicine
subject: Genetics
subject: FOS: Biological sciences
subject: Neuroscience
subject: Pharmacology
subject: Biotechnology
subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics
subject: Cancer
subject: Plant Biology

description: We develop a general statistical framework for the analysis and inference of large tree-structured data, with a focus on developing asymptotic goodness-of-fit tests. We first propose a consistent statistical model for binary trees, from which we develop a class of invariant tests. Using the model for binary trees, we then construct tests for general trees by using the distributional properties of the continuum random tree, which arises as the invariant limit for a broad class of models for tree-structured data based on conditioned Galton–Watson processes. The test statistics for the goodness-of-fit tests are simple to compute and are asymptotically distributed as χ2 and F random variables. We illustrate our methods on an important application of detecting tumor heterogeneity in brain cancer. We use a novel approach with tree-based representations of magnetic resonance images and employ the developed tests to ascertain tumor heterogeneity between two groups of patients. Supplementary materials for this article are available online.
Exchange interaction between magnetic adatoms on surfaces of noble metals
Creators: name: Simon, E.
name: Ujfalussy, B.
name: Lazarovits, B.
name: Szilva, A.
name: Szunyogh, L.
name: Stocks, G. M.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We present first principles calculations of the exchange interactions between magnetic impurities deposited on (001), (110) and (111) surfaces of Cu and Au and analyze them, in particular, in the asymptotic regime. For the (110) and the (111) surfaces we demonstrate that the interaction shows an oscillatory behavior as a function of the distance, R, of the impurities and that the amplitude of the oscillations decays as 1/R^2. Furthermore, the frequency of the oscillations is closely related to the length of the Fermi vector of the surface states existing on these surfaces. Due to the asymmetry of the the surface states' dispersion, the frequency of the oscillations becomes also asymmetric on the (110) surfaces, while on the Au(111) surface two distinct frequencies are found in the oscillations as a consequence of the Bychkov-Rashba splitting of the surface states. Remarkably, no long range oscillations of the exchange interaction are observed for the (001) surfaces where the surface states are unoccupied. When burying the impurities beneath the surface layer, oscillations mediated by the bulk states become visible.
description: 6 pages, 4 figures
Η ίδρυση της Ακαδημίας Αθηνών (1926): Οι Πρωταγωνιστές της και το ανθρωπιστικό ιδεώδες της
Creators: name: Καλύβα, Αγγελική
Publisher: name: Πανεπιστήμιο Πελοποννήσου
Year: 2024
Subjects: subject: Ακαδημία Αθηνών -- Ιστορία
subject: Ερευνητικά ιδρύματα -- Ελλάδα -- Ιστορία
subject: Πολιτιστική κληρονομιά -- Ελλάδα -- Ιστορία
subject: Ελλάδα -- Πολιτισμός -- Οργανισμοί κ.λπ. -- Ιστορία
subject: Ακαδημία Αθηνών
subject: Σίμων Σίνας
subject: Χάνσεν
subject: Ερνέστος Τσίλλερ
subject: Πολιτισμική κληρονομιά
subject: Academy of Athens
subject: Simon Sinas
subject: Hansen
subject: Ernesto Chiller
subject: Cultural heritage

description: Η Ακαδημία Αθηνών, ένα νεοκλασικό κτίριο στην Αθήνα, αποτελεί σημαντικό κόμβο ακαδημαϊκής γνώσης και πολιτιστικής κληρονομιάς. Η κατασκευή της ξεκίνησε το 1856 με δωρεά του Σίμωνα Σίνα και σχέδια του Θεόφιλου Χάνσεν. Η ιδέα της ίδρυσής της προέρχεται από το 1824, ενώ το 1904 ο Σπυρίδων Λάμπρος σχεδίασε την οργάνωσή της. Η ίδρυση της συνδέθηκε με τη συμμετοχή της Ελλάδας στη Διάσκεψη Ειρήνης των Παρισίων και τη Διεθνή Ένωση Ακαδημιών. Η Ακαδημία ιδρύθηκε το 1926, με στόχο τη διατήρηση της πολιτιστικής κληρονομιάς και την καλλιέργεια της εθνικής συνείδησης, προάγοντας την πνευματική αριστεία σε διάφορους επιστημονικούς κλάδους.
Experimental Demonstration of Time-Delay Interferometry for the Laser Interferometer Space Antenna
Creators: name: de Vine, Glenn
name: Ware, Brent
name: McKenzie, Kirk
name: Spero, Robert E.
name: Klipstein, William M.
name: Shaddock, Daniel A.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: We report on the first demonstration of time-delay interferometry (TDI) for LISA, the Laser Interferometer Space Antenna. TDI was implemented in a laboratory experiment designed to mimic the noise couplings that will occur in LISA. TDI suppressed laser frequency noise by approximately 10^9 and clock phase noise by 6x10^4, recovering the intrinsic displacement noise floor of our laboratory test bed. This removal of laser frequency noise and clock phase noise in post-processing marks the first experimental validation of the LISA measurement scheme.
description: 4 pages, 4 figures, to appear in Physical Review Letters end of May 2010
Bayesian Simultaneous Edit and Imputation for Multivariate Categorical Data
Creators: name: Manrique-Vallier, Daniel
name: Reiter, Jerome P.
Publisher: name: Taylor & Francis
Year: 2016
Subjects: subject: Genetics
subject: FOS: Biological sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: 80699 Information Systems not elsewhere classified
subject: FOS: Computer and information sciences
subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics
subject: Cancer

description: In categorical data, it is typically the case that some combinations of variables are theoretically impossible, such as a 3-year-old child who is married or a man who is pregnant. In practice, however, reported values often include such structural zeros due to, for example, respondent mistakes or data processing errors. To purge data of such errors, many statistical organizations use a process known as edit-imputation. The basic idea is first to select reported values to change according to some heuristic or loss function, and second to replace those values with plausible imputations. This two-stage process typically does not fully use information in the data when determining locations of errors, nor does it appropriately reflect uncertainty resulting from the edits and imputations. We present an alternative approach to editing and imputation for categorical microdata with structural zeros that addresses these shortcomings. Specifically, we use a Bayesian hierarchical model that couples a stochastic model for the measurement error process with a Dirichlet process mixture of multinomial distributions for the underlying, error-free values. The latter model is restricted to have support only on the set of theoretically possible combinations. We illustrate this integrated approach to editing and imputation using simulation studies with data from the 2000 U. S. census, and compare it to a two-stage edit-imputation routine. Supplementary material is available online.
Recent Transits of the Super-Earth Exoplanet GJ 1214b
Creators: name: Sada, Pedro V.
name: Deming, Drake
name: Jackson, Brian
name: Jennings, Donald E.
name: Peterson, Steven W.
name: Haase, Flynn
name: Bays, Kevin
name: O'Gorman, Eamon
name: Lundsford, Alan
Publisher: name: arXiv
Year: 2010
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: We report recent ground-based photometry of the transiting super-Earth exoplanet GJ1214b at several wavelengths, including the infrared near 1.25 microns (J-band). We observed a J-band transit with the FLAMINGOS infrared imager and the 2.1-meter telescope on Kitt Peak, and we observed several optical transits using a 0.5-meter telescope on Kitt Peak and the 0.36-meter Universidad de Monterrey Observatory telescope. Our high-precision J-band observations exploit the brightness of the M-dwarf host star at this infrared wavelength as compared to the optical, as well as being significantly less affected by stellar activity and limb darkening. We fit the J-band transit to obtain an independent determination of the planetary and stellar radii. Our radius for the planet (2.61^+0.30_-0.11 Earth radii) is in excellent agreement with the discovery value reported by Charbonneau et al. based on optical data. We demonstrate that the planetary radius is insensitive to degeneracies in the fitting process. We use all of our observations to improve the transit ephemeris, finding P=1.5804043 +/- 0.0000005 days, and T0=2454964.94390 +/- 0.00006 BJD.
description: Accepted for ApJ Letters, 7 pages, 3 Figures, 2 Tables
Variable Selection in Kernel Regression Using Measurement Error Selection Likelihoods
Creators: name: White, Kyle R.
name: Stefanski, Leonard A.
name: Wu, Yichao
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Medicine
subject: Genetics
subject: FOS: Biological sciences
subject: Neuroscience
subject: Evolutionary Biology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Sociology
subject: FOS: Sociology
subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics
subject: Cancer
subject: Plant Biology

description: This article develops a nonparametric shrinkage and selection estimator via the measurement error selection likelihood approach recently proposed by Stefanski, Wu, and White. The measurement error kernel regression operator (MEKRO) has the same form as the Nadaraya–Watson kernel estimator, but optimizes a measurement error model selection likelihood to estimate the kernel bandwidths. Much like LASSO or COSSO solution paths, MEKRO results in solution paths depending on a tuning parameter that controls shrinkage and selection via a bound on the harmonic mean of the pseudo-measurement error standard deviations. We use small-sample-corrected AIC to select the tuning parameter. Large-sample properties of MEKRO are studied and small-sample properties are explored via Monte Carlo experiments and applications to data. Supplementary materials for this article are available online.
The Design and Analysis for the Icing Wind Tunnel Experiment of a New Deicing Coating
Creators: name: Li, Xiaodong
name: He, Xu
name: He, Yuanzhen
name: Zhang, Hui
name: Zhang, Zhong
name: Lin, Dennis K. J.
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Space Science
subject: Neuroscience
subject: Pharmacology
subject: Biotechnology
subject: Immunology
subject: FOS: Clinical medicine
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Science Policy
subject: 110309 Infectious Diseases
subject: FOS: Health sciences

description: A new kind of deicing coating is developed to provide aircraft with efficient and durable protection from icing-induced dangers. The icing wind tunnel experiment is indispensable in confirming the usefulness of a deicing coating. Due to the high cost of each batch relative to the available budget, an efficient design of the icing wind tunnel experiment is crucial. The challenges in designing this experiment are multi-fold. It involves between-block factors and within-block factors, incomplete blocking with random effects, related factors, hard-to-change factors, and nuisance factors. Traditional designs and theories cannot be directly applied. To overcome these challenges, we propose using a step-by-step design strategy that includes applying a cross array structure for between-block factors and within-block factors, a group of balanced conditions for optimizing incomplete blocking, a run order method to achieve the minimum number of level changes for hard-to-change factors, and a zero aliased matrix for the nuisance factors. New (theoretical) results for D-optimal design of incomplete blocking experiments with random block effects and minimum number of level changes are obtained. Results of the experiments show that this novel deicing coating is promising in offering both high efficiency of ice reduction and a long service lifetime. The methodology proposed here is generalizable to other applications that involve nonstandard design problems. Supplementary materials for this article are available online.
Coast Salish law and jurisdiction over natural resources : a case study with the Tsleil-Waututh Nation
Creators: name: Hanson, Erin Michelle
Publisher: name: University of British Columbia
Year: 2018

description: In this thesis, I consider the impacts and implications of the legally-mandated Crown-Indigenous consultation process as experienced by the Tsleil-Waututh Nation, a Coast Salish First Nation based in greater Vancouver. Each year, Tsleil-Waututh receives approximately four hundred new development proposals in its territory, requiring daily negotiations on projects from forestry operations to pipelines. Consultation thus becomes a regularly-occurring, everyday site of jurisdictional interaction, where legal orders meet and governments enter into dialogue regarding the uses of territory. I ask how Tsleil-Waututh is able to enact their jurisdiction over natural resources in their territory, given their territory is currently the site of multiple colonial legal orders and jurisdictional assertions which seek to eliminate or otherwise limit Indigenous authority. Based on ethnographic research with the Tsleil-Waututh Nation, I argue that the legalization of the consultation process reduces Indigenous groups to mere participants within a Crown decision-making process, therefore rendering consultation in its current form unable to achieve its stated purpose of reconciliation. My research demonstrates that challenges inherent in Indigenous-Crown consultation are not a result of insufficient capacity on the part of First Nations but rather an element of the consultation process itself. Canadian law’s failure to define the outcome of consultation causes a disproportionate focus on procedural elements of consultation to secure certainty for the Crown; as a result, consultation disproportionately benefits the Crown and industry, and remains inadequate to protect Tsleil-Waututh’s rights, title, and interests from infringement over time. Regardless, Tsleil-Waututh does not participate in consultation as mere participants in a Crown process but rather does so as an assertion of its jurisdictional authority in order to uphold its own legal obligations to Tsleil-Waututh people and territory.