cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
FFD: Fast Feature Detector
Creators: name: Ghahremani, Morteza
name: Liu, Yonghuai
name: Tiddeman, Bernard
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Scale-invariance, good localization and robustness to noise and distortions are the main properties that a local feature detector should possess. Most existing local feature detectors find excessive unstable feature points that increase the number of keypoints to be matched and the computational time of the matching step. In this paper, we show that robust and accurate keypoints exist in the specific scale-space domain. To this end, we first formulate the superimposition problem into a mathematical model and then derive a closed-form solution for multiscale analysis. The model is formulated via difference-of-Gaussian (DoG) kernels in the continuous scale-space domain, and it is proved that setting the scale-space pyramid's blurring ratio and smoothness to 2 and 0.627, respectively, facilitates the detection of reliable keypoints. For the applicability of the proposed model to discrete images, we discretize it using the undecimated wavelet transform and the cubic spline function. Theoretically, the complexity of our method is less than 5\% of that of the popular baseline Scale Invariant Feature Transform (SIFT). Extensive experimental results show the superiority of the proposed feature detector over the existing representative hand-crafted and learning-based techniques in accuracy and computational time. The code and supplementary materials can be found at~{\url{https://github.com/mogvision/FFD}}.
Advances and applications of lattice supersymmetry
Creators: name: Giedt, Joel
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: I review motivations for the study of supersymmetric field theories by lattice techniques. In particular, some of the more interesting potential applications are described. These are models of quantum gravity, that rely on the AdS/CFT correspondence. The dual gauge theory is an ideal place for lattice studies to make a contribution. I also survey some of the recent advances in lattice formulations of supersymmetric theories.
description: 15 pages, 6 figures, plenary talk, XXIV International Symposium on Lattice Field Theory, July 23-28, 2006, Tucson, AZ, USA
Welsh Wreck Web Research Project (North Cardigan Bay). On-line research into the wreck of the: SV John Ellis
Creators: name: Whitewright, Malcolm
Publisher: name: Archaeology Data Service
Year: 2024

description: Welsh Wreck Web Research Project unpublished report series, 1
description: This project is to discover information relating to the reported wreck of the schooner SV John Ellis (MADU Ref. 238) for which there is a newspaper archived report of it having gone aground on 14 October 1881 at Abererch, Caernarfonshire, Wales. The home port was given as Porthmadog.
Energetics of critical oscillators in active bacterial baths
Creators: name: Gopal, Ashwin
name: Roldán, Édgar
name: Ruffo, Stefano
Publisher: name: arXiv
Year: 2020
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We investigate the nonequilibrium energetics near a critical point of a non-linear driven oscillator immersed in an active bacterial bath. At the critical point, we reveal a scaling exponent of the average power $\langle\dot{W}\rangle\sim (D_{\rm a}/τ)^{1/4}$ where $D_{\rm a}$ is the effective diffusivity and $τ$ the correlation time of the bacterial bath described by a Gaussian colored noise. Other features that we investigate are the average stationary power and the variance of the work both below and above the saddle-node bifurcation. Above the bifurcation, the average power attains an optimal, minimum value for finite $τ$ that is below its zero-temperature limit. Furthermore, we reveal a finite-time uncertainty relation for active matter which leads to values of the Fano factor of the work that can be below $2k_{\rm B}T_{\rm eff}$, with $T_{\rm eff}$ the effective temperature of the oscillator in the bacterial bath. We analyze different Markovian approximations to describe the nonequilibrium stationary state of the system. Finally, we illustrate our results in the experimental context by considering the example of driven colloidal particles in periodic optical potentials within an E. Coli bacterial bath.
description: 29 pages, 11 figures
Non-Fermi liquid behavior in transport across carbon nanotube quantum dots
Creators: name: Mayrhofer, Leonhard
name: Grifoni, Milena
Publisher: name: arXiv
Year: 2006
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: A low energy-theory for non-linear transport in finite-size single-wall carbon nanotubes, based on a microscopic model for the interacting pz electrons and successive bosonization, is presented. Due to the multiple degeneracy of the energy spectrum diagonal as well as off-diagonal (coherences) elements of the reduced density matrix contribute to the nonlinear transport. A four-electron periodicity with a characteristic ratio between adjacent peaks, as well as nonlinear transport features, in quantitative agreement with recent experiments, are predicted.
description: 5 pages, 3 figures
Gel Formation in Reversibly Cross-Linking Polymers
Creators: name: Formanek, Maud
name: Rovigatti, Lorenzo
name: Zaccarelli, Emanuela
name: Sciortino, Francesco
name: Moreno, Angel J.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: By means of Langevin dynamics simulations, we investigate the gel formation of randomly functionalized polymers in solution, with the ability to form both intra- and intermolecular reversible bonds. Under highly dilute conditions, these polymers form soft nano-objects (so-called single-chain nanoparticles, SCNPs), resulting from the purely intramolecular cross-linking of the reactive functional groups. Here we show that the competition between intra- and intermolecular bonds at finite concentration is governed by a delicate balance of various entropic contributions and leads to a density dependent effective valence. System-spanning networks are formed at relatively low monomer densities and their stability is mediated by just a small number of intermolecular connections per chain. The formation of intermolecular bonds furthermore can induce a non-monotonic dependence of the polymer size on the density for long bond lifetimes. Concomitantly, the polymers in the percolating cluster adopt an intramolecular structure characteristic for self-avoiding chains, which constitutes a strong contrast to the fractal globular behavior of irreversible SCNPs in crowded solutions with purely topological interactions (no intermolecular bonds). Finally, we study the dynamics of the system, which displays signatures expected for reversible gel-forming systems. An interesting behavior emerges in the reorganization dynamics of the percolating cluster. The relaxation is mostly mediated by the diffusion over long distances, through breaking and formation of bonds, of chains that do not leave the percolating cluster. Regarding the few chains that are transiently free, the time they spend until they reattach to the cluster is solely governed by the bond strength.
description: 40 single-column pages, 15 figures
Identifying short motifs by means of extreme value analysis
Creators: name: Bianchi, Daniela
name: Tirozzi, Brunello
Publisher: name: arXiv
Year: 2008
Subjects: subject: Genomics (q-bio.GN)
subject: FOS: Biological sciences

description: The problem of detecting a binding site -- a substring of DNA where transcription factors attach -- on a long DNA sequence requires the recognition of a small pattern in a large background. For short binding sites, the matching probability can display large fluctuations from one putative binding site to another. Here we use a self-consistent statistical procedure that accounts correctly for the large deviations of the matching probability to predict the location of short binding sites. We apply it in two distinct situations: (a) the detection of the binding sites for three specific transcription factors on a set of 134 estrogen-regulated genes; (b) the identification, in a set of 138 possible transcription factors, of the ones binding a specific set of nine genes. In both instances, experimental findings are reproduced (when available) and the number of false positives is significantly reduced with respect to the other methods commonly employed.
description: 6 pages, 5 figures
Welsh Wreck Web Research Project (North Cardigan Bay). On-line research into the: John Ewing (Schooner)
Creators: name: Davies, Gareth J.S.
Publisher: name: Archaeology Data Service
Year: 2024

description: Welsh Wreck Web Research Project unpublished report series, 1
description: This project is to discover information relating to the history of the schooner John Ewing built in Whitehaven in 1867. On March 25 1902, the John Ewing ran aground on Poppit Sands Cardigan. Newspaper articles say the ship was wrecked. However subsequent research shows the John Ewing was refloated and repaired. The John Ewing is reported to have sunk off Moelfre Anglesey on Oct 19 1925.
Welsh Wreck Web Research Project (North Cardigan Bay). On-line research into the Grounding of: John Gibson (Schooner)
Creators: name: Davies, Gareth J.S.
Publisher: name: Archaeology Data Service
Year: 2023

description: Welsh Wreck Web Research Project unpublished report series, 1
description: The John Gibson was a cargo schooner which sailed between ports on the S, SW, E, NW, NE coasts of England, S and N Wales, Ireland, N. Ireland, Scotland and occasionally Germany and France. Cargoes carried included raw materials and probably, grains, food products. On Oct 8th 1896, the crew of the schooner John Gibson were picked up by the Abersoch Lifeboat Oldham after dragging her anchors during a severe storm. Although reported as wrecked the John Gibson continued sailing until 1926 when records of it ended.
Κλαύδιος Κλαυδιανός, «Επιθαλάμιο για τον γάμο του Ονωρίου Αυγούστου»
Creators: name: Τσιτιρίδου, Ειρήνη Κωνσταντίνου
Publisher: name: Aristotle University of Thessaloniki
Year: 2015
Subjects: Κλαυδιανός Κλαύδιος
Επιθαλάμιο
Ονώριος Αύγουστος
Claudian Claudius
Epithalamium
Honorius Augusti

description: Το έργο του Κλαυδιανού Epithalamium de nuptiis Honorii Augusti («Επιθαλάμιο για τον γάμο του Ονωρίου Αυγούστου») είναι ένα συγκρότημα γαμήλιων ποιημάτων που αποτελείται από έναν ελεγειακό πρόλογο, τα κυρίως επιθαλάμιο, συντεθειμένο σε δακτυλικούς εξαμέτρους και, τέλος, τέσσερα λυρικά Fescennina. Στην προκείμενη εργασία διερευνώνται τα περιεχόμενα, οι διαστάσεις και ζητήματα που σχετίζονται με τα παραπάνω ποιήματα. Ειδικότερα, στο πρώτο μέρος («Δομή του έργου») μελετούμε τα παραπάνω μέρη του ποιητικού μας συγκροτήματος. Ο πρόλογος εισάγει τον αναγνώστη στο θέμα του γάμου, συνδέοντάς τον με την μυθική ένωση του Πηλέα και της Θέτιδας. Το επιθαλάμιο επικεντρώνεται στον ίδιο τον Ονώριο και παρουσιάζει τα στάδια της μετάβασής του από ερωτευμένο έφηβο σε δυναμικό άνδρα. Τέλος τα τέσσερα Fescennina ακολουθούν μία παρόμοια αφήγηση με αυτή του επιθαλαμίου, η οποία, όμως, έχει μία περισσότερο ικανοποιητική κατάληξη, την κατάκτηση της Μαρίας από τον ερωτευμένο Ονώριο. Στο δεύτερο μέρος της εργασίας μας παρουσιάζονται «ειδικότερες πτυχές του έργου»: το ελεγειακό θέμα της militia amoris η οποία διέπει ολόκληρο το τέταρτο Fescenninum, ο Ονώριος ως ελεγειακός αυτοκράτορας και η χρήση του μύθου στο επιθαλάμιο (ο Έρωτας, το άλσος του ανακτόρου της Αφροδίτης, η Αφροδίτη, το ανάκτορο της Αφροδίτης και τα μυθολογικά και πραγματικά πρόσωπα).
description: Claudian’s Epithalamium de nuptiis Honorii Augusti is a group of wedding poems, including an elegiac preface, the main epithalamium, written in dactylic hexameters, and four lyric fescennines. In this study we look into the contents and issues associated with the poems above. Particularly, in the first part (‘structure of the poem’) we consider these issues. The preface introduces the reader to the theme of marriage linking it with the mythical union of Peleus and Thetis. The epithalamium focuses on Honorius himself and shoes his transition from an amorous adolescent to a virile groom. The four fescennines trace a similar narrative but continue it to a more satisfying conclusion, Honorius’ conquest of Maria. In the second part of this study more specific aspects of the poem are examined; the elegiac theme of militia amoris in the fourth fescennine, Honorius as an elegiac emperor, the emperor’s role in the current issues of the Empire, as well as the use of myth in the epithalamium (Amor, the grove of Venus’ palace, Venus herself, mythical and real participants of the wedding).
Tunable intraband optical conductivity and polarization-dependent epsilon-near-zero behavior in black phosphorus
Creators: name: Biswas, Souvik
name: Whitney, William S.
name: Grajower, Meir Y.
name: Watanabe, Kenji
name: Taniguchi, Takashi
name: Bechtel, Hans A.
name: Rossman, George R.
name: Atwater, Harry A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Optics (physics.optics)
subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: Black phosphorus (BP) offers considerable promise for infrared and visible photonics. Efficient tuning of the bandgap and higher subbands in BP by modulation of the Fermi level or application of vertical electric fields has been previously demonstrated, allowing electrical control of its above bandgap optical properties. Here, we report modulation of the optical conductivity below the band-gap (5-15 um) by tuning the charge density in a two-dimensional electron gas (2DEG) induced in BP, thereby modifying its free carrier dominated intraband response. With a moderate doping density of 7x10^12/cm2 we were able to observe a polarization dependent epsilon-near-zero behavior in the dielectric permittivity of BP. The intraband polarization sensitivity is intimately linked to the difference in effective fermionic masses along the two crystallographic directions, as confirmed by our measurements. Our results suggest the potential of multilayer BP to allow new optical functions for emerging photonics applications.
description: 17 pages, 4 figures
Higher Education in Prison
Creators: name: Castro, Erin L.
name: Gould, Mary R.
Publisher: name: Critical Education
Year: 2019

description: Since first publishing the Call for Papers for this volume (2017), we have spent more than two years “ruminating” with the twelve authors who have contributed to this project and many others in the higher education in prison community who have generously offered feedback, posed questions (and some challenges) and most notably, we express our gratitude to the instructors who have brought these readings into their classrooms, to incarcerated and non-incarcerated students, and rigorously engaged the ideas offered. In this final essay, we touch on three themes that we believe are relevant to the present moment and purpose of this volume and that are central to field building efforts: equity in higher education, the quality and “promise” of Pell grant restoration, and how and why we should foster a community of scholarship and practice.
description: Critical Education, Vol 10 No 13 (2019)
The Frequency of Carbon-Enhanced Metal-Poor Stars in the Galaxy from the HERES sample
Creators: name: Lucatello, Sara
name: Beers, Timothy
name: Christlieb, Norbert
name: Barklem, Paul
name: Rossi, Silvia
name: Marsteller, Brian
name: Sivarani, Thirupathi
name: Lee, Young Sun
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We estimate the frequency of Carbon-Enhanced Metal-Poor (CEMP) stars among very metal-poor stars, based on an analysis of 349 stars with available high-resolution spectra observed as part of the Hamburg/ESO R-process Enhanced Star (HERES) survey. We obtain that {\it a lower limit of} 21 $\pm$ 2% of stars with [Fe/H] $\leq -2.0$ exhibit [C/Fe] $\geq +1.0$. These fractions are higher than have been reported by recent examinations of this question, based on substantially smaller samples of stars. We discuss the source of this difference and suggest that in order to take into account effects that result in a decrease of surface carbon abundance with advancing evolution, a definition of CEMP stars based on a [C/Fe] cutoff that varies as a function of luminosity is more appropriate. We discuss the likely occurrence of dilution and mixing for many CEMP stars, which, if properly accounted for, would increase this fraction still further.
description: 7 pages, 3 figures. ApJL accepted
Welsh Wreck Web Research Project (North Cardigan Bay). On-line research into the wreck of the: SV John G Walter
Creators: name: East, Ashton
Publisher: name: Archaeology Data Service
Year: 2024

description: Welsh Wreck Web Research Project unpublished report series, 1
description: The SV John G Walter was a cargo-carrying three-mast schooner launched 1903, and wrecked 1918 off Caernavon Bay. The German submarine U-101 had come up alongside the ship and ordered her crew to the boats before scuttling with explosive charges.
Μελέτες για τη σύνθεση της Σαπροπτερίνης και της μακρολακτόνης Sch-725476
Creators: name: Γραμματόγλου, Κωνσταντίνος Ευάγγελου
Publisher: name: Aristotle University of Thessaloniki
Year: 2015
Subjects: Σαπροπτερίνη
Μακρολίδια
Μακρολακτόνη
Sapropterin
Macrolactone
Sch-725476

description: Σκοπός της εργασίας ήταν η ανάπτυξη μιας νέας, σύντομης και αποδοτικής σύνθεσης της Σαπροπτερίνης (Τετραϋδροβιοπτερίνη, ΒΗ4), καθώς και μια ολική σύνθεση της μακρολακτόνης Sch-725476. Η Σαπροπτερίνη αποτελεί έναν σημαντικό συμπαράγοντα ο οποίος συμμετέχει σε πολλές διεργασίες που αφορούν μεταβολικές οδούς αμινοξέων. Επίσης είναι ένα δραστικό φαρμακευτικό συστατικό το οποίο χρησιμοποιείται σε φάρμακα για την αντιμετώπιση μιας σπάνιας μορφής υπερφαινυλαλανιναιμίας (HPA) η οποία δεν μπορεί να αντιμετωπιστεί διατροφικά. Η μακρολακτόνη Sch-725476 είναι μια πρόσφατα απομονωμένη μακρολακτόνη η οποία επιδεικνύει αντιμυκητιασική δράση. Έχει ιδιαίτερη δομή, καθώς ο δεκατετραμελής μακρολακτονικός δακτύλιός της στερείται πρόσθετων μεθυλικών ομάδων. Η ύπαρξη μόνο τριών συνθέσεων της Sch-725476 αποτέλεσε ένα επιπλέον κίνητρο για τη συνθετική μας προσπάθεια. Συνοψίζοντας, καταφέραμε να προσεγγίσουμε συνθετικά τόσο τη Σαπροπτερίνη, όσο και την μακρολακτόνη Sch-725476, δημιουργώντας τις προϋποθέσεις οι συνθετικές αυτές προσπάθειες να ολοκληρωθούν στο μέλλον.
description: The aim of the present thesis was to develop a new, short and efficient synthesis of Sapropterin (Tetrahydrobiopterin, BH4) and a total synthesis of macrolactone Sch-725476. Sapropterin is an important cofactor that is involved in many metabolic processes related to amino acid metabolic pathways. It is also an active pharmaceutical ingredient which is used in medicines to treat a rare form of hyperphenylalaninemia (HPA) which cannot be treated nutritionally. The macrolactone Sch-725476 is a recently isolated macrolactone exhibiting antifungal activity. It is of particular structure, as the fourteen member macrolactone ring lacks additional methyl groups. The existence of only three syntheses of Sch-725476 was an additional incentive for our synthetic effort. In summary, we managed to reach synthetic approach for both sapropterin and macrolactone Sch-725476, creating the preconditions these synthetic efforts to be completed in the future.
Αλγεβρική επεξεργασία εικόνων
Creators: name: Τούπα, Παναγιώτα Χρήστου
Publisher: name: Aristotle University of Thessaloniki
Year: 2015
Subjects: Γραμματικές εικόνων
Γλώσσες εικόνων
Διπλοβαθμωτά σύνολα
Picture Grammars
Picture languages
Doube ranked sets

description: Η θεωρία τυπικών γλωσσών ξεκίνησε να αναπτύσσεται αρχικά με σκοπό την κατανόηση και την περιγραφή των φυσικών γλωσσών αλλά και των γλωσσών προγραμματισμού. Έκτοτε έχει γίνει μεγάλη πρόοδος στον τομέα αυτό. Φυσικό επόμενο ήταν να αναπτυχθεί και αντίστοιχη θεωρία για διδιάστατες λέξεις, τις εικόνες. Τα πρώτα μοντέλα που προτάθηκαν για παραγωγή και αναγώριση εικόνων έκαναν την εμφάνισή τους στις δεκαετίες του 1960 και 1970. Πολλά μοντέλα έχουν προταθεί από τότε, όπως τα two dimensional on-line tesselation acceptor (2OTA), τα τετραπολικά αυτόματα με βάρη πάνω από έναν ημιδακτύλιο (ή χωρίς βάρη), κ.α. και έχουν μελετηθεί οι ιδιότητες των κλάσεων των γλωσσών που παράγουν. Στην παρούσα διπλωματική εργασία θα ασχοληθούμε με τις picture refinement γραμματικές. Στο πρώτο κεφάλαιο παρουσιάζο-νται οι εισαγωγικές έννοιες που θα χρειαστούν. Στο δεύτερο κεφάλαιο αναλύονται τα \textlatin{deformation monoids} που θα χρησιμοποιηθούν στη συνέχεια για τον ορισμό των γραμματικών μας. Στα επόμενα κεφάλαια, βλέπουμε πως με την αντικατάσταση εικόνων καταλήγουμε τελικά να πάρουμε άπειρες εικόνες.
description: The theory of formal languages was initially motivated by the need to understand and describe the natural languages and the programming languages. Since then, a great progress has been made in this sector. It was only natural to expand this theory on two-dimensional words, the pictures. The first devices for picture generation and recognition were proposed in the 1960s and 1970s. Since then, there are proposed many devices like the two dimensional on-line tessellation acceptor (2OTA), the weighted (or non-weighted) quadrapolic automata, et al. and their classes of languages and closure properties have been studied. In the present thesis we will present the picture refinement grammars. In the first chapter we will see some necessary introductory definitions. In the second chapter we will analyze the deformation monoids that we will use later to define our grammars. In the following chapters we will study picture substitution that will lead us eventually into the definition of the infinite pictures.
Welsh Wreck Web Research Project (North Cardigan Bay). On-line research into the wreck of the Welsh Schooner: Joseph Nicholson
Creators: name: Braybrooke, Nigel
Publisher: name: Archaeology Data Service
Year: 2024

description: Welsh Wreck Web Research Project unpublished report series, 1
description: This report looks at the Welsh schooner Joseph Nicholson and covers her construction in Nefyn, on the Llwn Peninsula in May 1868, until her loss after a collision with the Porthmadog schooner Walter Ulric near Hell's Mouth (Porth Neigwl) on 14 February 1895.
Welsh Wreck Web Research Project (North Cardigan Bay). On-line research into the loss of the ship Kenilworth, which was wrecked on Sarn Badrig in January 1870.
Creators: name: Holden, Chris
Publisher: name: Archaeology Data Service
Year: 2024

description: Welsh Wreck Web Research Project unpublished report series, 1
description: On-line and practical research into the full-rigged ship Kenilworth, which was wrecked in Cardigan Bay after having grounded on Sarn Badrig. The Barmouth and Abersoch lifeboats rescued everyone aboard.
The effectiveness of reflective tarpaulins in protecting tree seedling against heat stress
Creators: name: Stjernberg, Ernst I.
Publisher: name: University of British Columbia
Year: 2009

description: Reflective tarpaulins are used extensively in western Canada to protect tree seedlings against solar radiation during on-site storage and transportation. This project determined heat transfer characteristics of new and used reflective tarpaulins, and a FIST (Fiberglass Insulated Seedling Transporter) canopy. Containerized white spruce (Picea glauca (Moench) Voss) seedlings in shipping boxes were stored under tarpaulins and in the FIST canopy for up to six days in June, 1992. An unprotected seedling box was used as the control. Average seedling box temperatures per each 15-minute period were recorded for 144 h. Solar irradiance and wind speed at the test site were recorded simultaneously with box temperatures. The electrical conductivity of needles was measured after storage. Seedlings were withdrawn daily for six days and outplanted in a nursery plot in a split-plot randomized complete block design with repeated measurements within each experimental unit. Root collar diameter, total height and survival were recorded for three growing seasons. Samples of the tarpaulins were also tested under controlled conditions for ability to resist heat transfer. Seedling box temperatures ranged up to 35°C. Significant differences in 144-hour heat sums were found between: new and used tarpaulins; various used tarpaulins; tarpaulins and control; three new tarpaulins and the FIST canopy. Relative conductivities indicated no storage-induced damage to cell membranes. Survival after three years was 99.8%. Significant differences in growth were found but were more likely related to differences in soil nutrient differences within the plot. Storage temperature and length had no effect on growth and survival. A laboratory experiment tested for storage-induced pre-conditioning effects. Controls and seedlings pre-conditioned 4 and 8 days for 3 h at 30°C, were heat stressed for 8 h or 48 h at 30, 35, and 40°C. Electrical conductivities of needles were measured. Seedlings were outplanted in two plots with a completely randomized design. Root collar diameter, total height and survival were recorded for two growing seasons. No cell membrane damage was observed. Survival after two years was 99.5%. Evidence for a pre-conditioning effect is inconclusive. The 8-day pre-conditioning may have resulted in higher growth in seedlings heat stressed for 48 h.
Indicadores ACTIC
Creators: name: Prats, Miquel Ángel
name: Romeu, Teresa
name: Guitert, Montse
name: Ojando, Elena
name: Simon, Jordi
Publisher: name: Zenodo
Year: 2021
Subjects: Competencia digital
Acreditación
Ciudadanía
Participación ciudadana
TIC

description: La tabla presenta los indicadores de la nueva versión del ACTIC (Acreditación Catalana de Competencias TIC)
description: Departament de Polítiques Digitals i Administració Pública de la Generalitat de Catalunya.
Welsh Wreck Web Research Project (North Cardigan Bay). On-line research into the wreck of the: S.S. Empire Kingfisher
Creators: name: Whitewright, Malcolm
Publisher: name: Archaeology Data Service
Year: 2024

description: Welsh Wreck Web Research Project unpublished report series, 1
description: This project is to discover information relating to the reported wreck of the steamship Kingfisher for which there is a report (MADU Ref. 436) of it having gone aground on 09 October 1940 at Abersoch, Caernarfonshire, Wales and been abandoned. The home port was given as New York.
Simflowny 3: An upgraded platform for scientific modelling and simulation
Creators: name: Palenzuela, C.
name: Miñano, B.
name: Arbona, A.
name: Bona-Casas, C.
name: Bona, C.
name: Massó, J.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computational Physics (physics.comp-ph)
subject: Mathematical Software (cs.MS)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Simflowny is an open platform which automatically generates efficient parallel code of scientific dynamical models for different simulation frameworks. Here we present major upgrades on this software to support simultaneously a quite generic family of partial differential equations. These equations can be discretized using: (i) standard finite-difference for systems with derivatives up to any order, (ii) High-Resolution-Shock-Capturing methods to deal with shocks and discontinuities of balance law equations, and (iii) particle-based methods. We have improved the adaptive-mesh-refinement algorithms to preserve the convergence order of the numerical methods, which is a requirement for improving scalability. Finally, we have also extended our graphical user interface (GUI) to accommodate these and future families of equations. This paper summarizes the formal representation and implementation of these new families, providing several validation results.
description: 11 pages, 6 figures, accepted in Computer Physics Communications
Dynamical Models of Elliptical Galaxies in z=0.5 Clusters: II. Mass-to-Light Ratio Evolution without Fundamental Plane Assumptions
Creators: name: van der Marel, Roeland P.
name: van Dokkum, Pieter G.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We study M/L evolution of early-type galaxies using dynamical modeling of resolved internal kinematics. This makes fewer assumptions than Fundamental Plane (FP) studies and provides a powerful new approach for studying galaxy evolution. We focus on the sample of 25 galaxies in clusters at z=0.5 modeled in Paper I. For comparison we compile and homogenize M/L literature data for 60 nearby galaxies that were modeled in comparable detail. The nearby sample obeys log(M/L)_B = Z + S log(sigma_eff/[200 km/s]), with Z = 0.896 +/- 0.010, S = 0.992 +/- 0.054, and sigma_eff the effective velocity dispersion. The z=0.5 sample follows a similar relation but with lower zeropoint. The implied M/L evolution is Delta log(M/L) / Delta z = -0.457 +/- 0.046(random) +/- 0.078(systematic), consistent with passive evolution following high-redshift formation. This agrees with the FP results for this sample by van Dokkum & van der Marel. This confirms that FP evolution tracks M/L evolution, which is an important verification of the assumptions that underly FP studies. However, while we find more FP evolution for galaxies of low sigma_eff (or low mass), the dynamical M/L evolution instead shows little trend with sigma_eff. We argue that this difference can be plausibly attributed to a combination of two effects: (a) evolution in structural galaxy properties other than M/L; and (b) the neglect of rotational support in studies of FP evolution. The results leave the question open whether the low-mass galaxies in the sample have younger population ages than the high-mass galaxies. This highlights the general importance in the study of population ages for complementing dynamical measurements with broad-band colors or spectroscopic population diagnostics.
description: ApJ, submitted; 17 pages formatted with emulateapj
Από τα θρανία στην πλατεία. Η Νεανική Σκηνή του ΚΘΒΕ.
Creators: name: Λυκάρτση, Μαρία Δημητρίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2015
Subjects: ΚΘΒΕ
Εφηβικό Θέατρο
Παράσταση
NTNG
Youth Theatre
Performance

description: Στο πλαίσιο των σύγχρονων θεατρικών σπουδών, που δίνουν έμφαση περισσότερο στη μελέτη της παράστασης κι όχι πια του κειμένου, και με δεδομένη την εμφάνιση και στην Ελλάδα των νεανικών/εφηβικών σκηνών, ενός εξειδικευμένου είδους θεάτρου, η παρούσα εργασία εστιάζει στη Νεανική Σκηνή του Κρατικού Θεάτρου Βορείου Ελλάδος. Αντικείμενο της μελέτης είναι οι επικοινωνιακοί κώδικες (κειμενική διασκευή, σκηνοθεσία, οπτικοακουστικά σημεία, υποκριτική) μιας καλλιτεχνικής επικοινωνίας που απευθύνεται κατ' εξοχήν στον έφηβο θεατή, αλλά και η πρόσληψη της παράστασης από τον τελευταίο. Η ανάγνωση μιας θεατρικής Σκηνής και η συστηματική της ανάλυση είναι εφικτή μέχρι ενός σημείου λόγω των πολλών και διαφορετικών σημαινόντων συστημάτων που συνυπάρχουν σε κάθε παράσταση. Το παιδαγωγικό αντίκρισμα βρίσκεται εδώ στο επίκεντρο της διερεύνησης, μια που η Νεανική Σκηνή έχει ως στόχο, μεταξύ άλλων, τη διά του θεάτρου διαπαιδαγώγηση. Η μελέτη στηρίζεται κυρίως σε πρωτογενείς πηγές. Αν, λοιπόν, "το θέατρο στο σχολείο" έχει σε κάποιο βαθμό διερευνηθεί, η παρούσα εργασία εξετάζει την επίσκεψη "του σχολείου στο θέατρο" με δεδομένο ότι το κοινό της Νεανικής Σκηνής είναι μαθητές γυμνασίου και λυκείου. Η θεωρητική διερεύνηση συνοδεύεται από τα αποτελέσματα από τη διεξαγωγή εμπειρικής έρευνας με ερωτηματολόγια σε μαθητές και εκπαιδευτικούς που παρακολούθησαν την πιο πρόσφατη παραγωγή της Νεανικής Σκηνής του ΚΘΒΕ.
description: This paper focuses on the Youth Stage of National Theatre of Northern Greece in the context of contemporary theatre studies, a field that involves the study of the performance rather than the study of the text itself, taking into consideration the fact of the appearance of youth/teenage scenes (a specialised kind of theatre) in Greece. The object of the study lies both in the communicative codes (such as textual adaptation, direction, audiovisual elements and acting) of an artistic communication that is addressed primarily to teen audiences and the reception of the performance on the part of the young audiences, as well. The ''reading'' and systematic analysis of a theatrical scene is allowed up to a certain extent due to the various semiotic systems that coexist in every performance. Thus, the pedagogical impact here lies in the heart of investigation, since Youth Stage aims at education through theatre among other things. The study is based mostly in primary sources. Therefore, since ''theatre in education'' has been explored to some extent, this paper approaches the reverse issue, that is ''the school's visit to the theatre'' accounting the fact that the audiences of Youth Stage are high school and upper high school students. The theoretical investigation is accompanied by the results of an empirical research in which the use of questionnaires of students and teachers who attended the most recent performance production of NTNT's Youth Stage is included.
Direct Photons from Hot Quark Matter in Renormalized Finite-Time-Path QED
Creators: name: Dadić, Ivan
name: Klabučar, Dubravko
name: Kuić, Domagoj
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Within the finite-time-path out-of-equilibrium quantum field theory (QFT), we calculate direct photon emission from early stages of heavy ion collisions, from a narrow window, in which uncertainty relations are still important and they provide a new mechanism for production of photons. The basic difference with respect to earlier calculations, leading to diverging results, is that we use renormalized QED of quarks and photons. Our result is a finite contribution that is consistent with uncertainty relations.
description: 17 pages, 1 figure
A new realistic many-body approach for the description of high-energy scattering processes off complex nuclei
Creators: name: Alvioli, M.
name: Atti, C. Ciofi degli
name: Morita, H.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: A linked cluster expansion for the calculation of ground state observables of nuclei with realistic interactions has been developed. Using the V8' potential the ground state energy, density and momentum distribution of complex nuclei have been calculated and found to be in good agreement with the results obtained within the Fermi Hyper Netted Chain, and Variational Monte Carlo approaches. Using the same cluster expansion, with wave function and correlations parameters fixed from the calculation of the ground-state observables, various high energy scattering processes off complex nuclei have been calculated taking final state interaction effects into account by means of the Glauber multiple scattering series.
description: 7 pages, 4 figures, presented by M. Alvioli at the "13th International Conference on Recent Progress in Many-Body Theories", Buenos Aires - Argentina, 5-9 December 2005
Numerical evolution of radiative Robinson-Trautman spacetimes
Creators: name: de Oliveira, H. P.
name: Rodrigues, E. L.
Publisher: name: arXiv
Year: 2008
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The evolution of spheroids of matter emitting gravitational waves and null radiation field is studied in the realm of radiative Robinson-Trautman spacetimes. The null radiation field is expected in realistic gravitational collapse, and can be either an incoherent superposition of waves of electromagnetic, neutrino or massless scalar fields. We have constructed the initial data identified as representing the exterior spacetime of uniform and non-uniform spheroids of matter. By imposing that the radiation field is a decreasing function of the retarded time, the Schwarzschild solution is the asymptotic configuration after an intermediate Vaidya phase. The main consequence of the joint emission of gravitational waves and the null radiation field is the enhancement of the amplitude of the emitted gravitational waves. Another important issue we have touched is the mass extraction of the bounded configuration through the emission of both types of radiation.
description: 13 pages, 9 figures
Weak localization correction to the anomalous Hall effect in polycrystalline Fe films
Creators: name: Mitra, P.
name: Hebard, A. F.
name: Muttalib, K. A.
name: Woelfle, P.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: In situ transport measurements have been made on ultrathin ($
description: 5 pages, 4 figures; revised submission with additional data and more general interpretation
Gas Absorption Detected from the Edge-on Debris Disk Surrounding HD32297
Creators: name: Redfield, Seth
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Near-infrared and optical imaging of HD32297 indicate that it has an edge-on debris disk, similar to beta Pic. I present high resolution optical spectra of the NaI doublet toward HD32297 and stars in close angular proximity. A circumstellar absorption component is clearly observed toward HD32297 at the stellar radial velocity, which is not observed toward any of its neighbors, including the nearest only 0.9 arcmin away. An interstellar component is detected in all stars >90 pc, including HD32297, likely due to the interstellar material at the boundary of the Local Bubble. Radial velocity measurements of the nearest neighbors, BD+07 777s and BD+07 778, indicate that they are unlikely to be physically associated with HD32297. The measured circumstellar column density around HD32997, log N(NaI) ~ 11.4, is the strongest NaI absorption measured toward any nearby main sequence debris disk, even the prototypical edge-on debris disk, beta Pic. Assuming that the morphology and abundances of the gas component around HD32297 are similar to beta Pic, I estimate an upper limit to the gas mass in the circumstellar disk surrounding HD32297 of ~0.3 M_Earth.
description: 13 pages, 2 figures; Accepted for publication in ApJ Letters
Black hole entropy quantization
Creators: name: Corichi, Alejandro
name: Diaz-Polo, Jacobo
name: Fernandez-Borja, Enrique
Publisher: name: arXiv
Year: 2006
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Ever since the pioneer works of Bekenstein and Hawking, black hole entropy has been known to have a quantum origin. Furthermore, it has long been argued by Bekenstein that entropy should be quantized in discrete (equidistant) steps given its identification with horizon area in (semi-)classical general relativity and the properties of area as an adiabatic invariant. This lead to the suggestion that black hole area should also be quantized in equidistant steps to account for the discrete black hole entropy. Here we shall show that loop quantum gravity, in which area is {\it not} quantized in equidistant steps can nevertheless be consistent with Bekenstein's equidistant entropy proposal in a subtle way. For that we perform a detailed analysis of the number of microstates compatible with a given area and show consistency with the Bekenstein framework when an oscillatory behavior in the entropy-area relation is properly interpreted.
description: 4 pages, 4 figures. Version to be published in PRL
Evolution programs, simulated annealing and hill climbing applied to harvest scheduling problems
Creators: name: Liu, Guoliang
Publisher: name: University of British Columbia
Year: 2009

description: To protect non-timber resources such as wildlife, water quality and aesthetics, harvesting regulations have been introduced that limit opening size, and set minimum green-up times. Many constraints have been introduced to long-term, multiple-use forest planning problems. Proper scheduling of cut blocks for the large-scale integrated forest planning is important in order to produce the maximum amount of timber from the land base without violating the constraints. Also, these problems are difficult to solve due to the problem size and the constraint structure. These non-linear combinatorial optimization problems are difficult and even impossible to solve to optimality with present- day computers. In this thesis, three models based on evolution programs, simulated annealing and hill climbing were developed with C and C++ for solving forest planning problems. Both evolution programs an d simulated annealing are probabilistic algorithms that will accept inferior moves within the search space as a means of searching out global optima. They differ from hill climbing algorithms that only accept superior solutions, and often stall at local optima. Evolution programs simultaneously work with a population of solutions, while simulated annealing is a specific case where the population size is reduced to one. Evolution programs and simulated annealing are applicable to a broad range of problems for which very little prior knowledge is available. However, many opportunities exist for improving the performance of these algorithms by incorporating problem specific knowledge and heuristics. This is the first time that simulated annealing theory is used on a problem- specific gene recombination operator working on individual chromosomes. It is believed that the evolution programs can be applied to many more problems. It was found that all solutions generated by all these methods were within 3.12% of the best solution found. All the solutions found by simulated annealing are within 1.00%; evolution programs, 2.54% and hill climbing, 3.12% of this best solution. However, simulated annealing converged much faster on the optimum than did the evolution program. Using a 486/50 MHz computer, the evolution program took 378 minutes with a population of 30 chromosomes, 431 harvest blocks and 10,000 generations. Simulated annealing took only 36.8 minutes, while hill climbing took 32.7 minutes on the same problem.
Appell polynomials and their relatives III. Conditionally free theory
Creators: name: Anshelevich, Michael
Publisher: name: arXiv
Year: 2008
Subjects: subject: Operator Algebras (math.OA)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 46L53 (Primary), 46L54, 05E35 (Secondary)

description: We extend to the multivariate non-commutative context the descriptions of a "once-stripped" probability measure in terms of Jacobi parameters, orthogonal polynomials, and the moment generating function. The corresponding map Phi on states was introduced previously by Belinschi and Nica. We then relate these constructions to the c-free probability theory, which is a version of free probability for algebras with two states, introduced by Bozejko, Leinert, and Speicher. This theory includes as two extreme cases the free and Boolean probability theories. The main objects in the paper are the analogs of the Appell polynomial families in the two state context. They arise as fixed points of the transformation which takes a polynomial family to the associated polynomial family (in several variables), and their orthogonality is also related to the map Phi above. In addition, we prove recursions, generating functions, and factorization and martingale properties for these polynomials, and describe the c-free version of the Kailath-Segall polynomials, their combinatorics, and Hilbert space representations.
description: A major revision: same theorems, different emphasis
Self-Play Reinforcement Learning for Fast Image Retargeting
Creators: name: Kajiura, Nobukatsu
name: Kosugi, Satoshi
name: Wang, Xueting
name: Yamasaki, Toshihiko
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: In this study, we address image retargeting, which is a task that adjusts input images to arbitrary sizes. In one of the best-performing methods called MULTIOP, multiple retargeting operators were combined and retargeted images at each stage were generated to find the optimal sequence of operators that minimized the distance between original and retargeted images. The limitation of this method is in its tremendous processing time, which severely prohibits its practical use. Therefore, the purpose of this study is to find the optimal combination of operators within a reasonable processing time; we propose a method of predicting the optimal operator for each step using a reinforcement learning agent. The technical contributions of this study are as follows. Firstly, we propose a reward based on self-play, which will be insensitive to the large variance in the content-dependent distance measured in MULTIOP. Secondly, we propose to dynamically change the loss weight for each action to prevent the algorithm from falling into a local optimum and from choosing only the most frequently used operator in its training. Our experiments showed that we achieved multi-operator image retargeting with less processing time by three orders of magnitude and the same quality as the original multi-operator-based method, which was the best-performing algorithm in retargeting tasks.
description: Accepted to ACM Multimedia 2020
The direction of the microjet produced by the collapse of a cavitation bubble locatedin between a wall and a free surface
Creators: name: Kiyama, Akihito
name: Shimazaki, Takaaki
name: Gordillo, José Manuel
name: Tagawa, Yoshiyuki
Publisher: name: arXiv
Year: 2020
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: In this paper, we present a simplified theoretical model based on the method of images that predicts the direction of the microjet produced after the implosion of the cavitation bubble created in between a free interface and rigid wall. Our theoretical predictions have been verified by means of a thorough experimental study in which the distances of the pulsed-laser cavitation bubble to the wall and the free surface are varied in a systematic manner. In addition, we extend the predictions to arbitrary values of the corner angle, $π/(2n)$ with $n$ a natural number. The present analytical solution will be useful in the design of new strategies aimed at preventing the damage caused by cavitating bubbles over solid substrates
description: 6 pages, 7 figures