Search results for " libraries"
showing 10 items of 239 documents
Operator product expansion coefficients in the exact renormalization group formalism
2020
We study how to compute the operator product expansion coefficients in the exact renormalization group formalism. After discussing possible strategies, we consider some examples explicitly, within the $\epsilon$-expansions, for the Wilson-Fisher fixed points of the real scalar theory in $d=4-\epsilon$ dimensions and the Lee-Yang model in $d=6-\epsilon$ dimensions. Finally we discuss how our formalism may be extended beyond perturbation theory.
Integrands of loop amplitudes within loop-tree duality
2020
Using loop-tree duality, we relate a renormalised $n$-point $l$-loop amplitude in a quantum field theory to a phase-space integral of a regularised $l$-fold forward limit of a UV-subtracted $(n+2l)$-point tree-amplitude-like object. We show that up to three loops the latter object is easily computable from recurrence relations. This defines an integrand of the loop amplitude with a global definition of the loop momenta. Field and mass renormalisation are performed in the on-shell scheme.
Nonperturbative renormalization and O(a)-improvement of the nonsinglet vector current with Nf=2+1 Wilson fermions and tree-level Symanzik improved ga…
2019
In calculating hadronic contributions to precision observables for tests of the Standard Model in lattice QCD, the electromagnetic current plays a central role. Using a Wilson action with O(a) improvement in QCD with Nf flavors, a counterterm must be added to the vector current in order for its on-shell matrix elements to be O(a) improved. In addition, the local vector current, which has support on one lattice site, must be renormalized. At O(a), the breaking of the SU(Nf) symmetry by the quark mass matrix leads to a mixing between the local currents of different quark flavors. We present a nonperturbative calculation of all the required improvement and renormalization constants needed for …
Disegno geometrico e storia dell’arte nell’accademia di Pietro Selvatico (1849-1859)
2016
This book chapter investigates Pietro Selvatico Estense's position as director of the Venice Academy of Fine Arts (1849-1859). During this period art history classes and linear drawing have been strengthened within the academic curriculum.
Einstein's Washington Manuscript on Unified Field Theory
2020
In this note, we point attention to and briefly discuss a curious manuscript of Einstein, composed in 1938 and entitled "Unified Field Theory," the only such writing, published or unpublished, carrying this title without any further specification. Apparently never intended for publication, the manuscript sheds light both on Einstein's modus operandi as well as on the public role of Einstein's later work on a unified field theory of gravitation and electromagnetism.
Joan Roís de Corella, la seua vida i el seu entorn: noves dades per a la història de la cultura en la València del segle xv
2014
This article offers a full updating of the biographical records of the writer Joan Roís de Corella (1435-1497) and his family: his great-grandparents, grandparents, parents, siblings and children. All data are presented in a systematic way, generation by generation, and a new vision of the writer himself is offered. In its documentary section, 432 documents are transcribed or summarised, dating from 1373 to 1516. A broad range of new archival data is presented; other previously known data are corrected or improved. Some examples: Joan Roís de Corella had four children: Magdalena (born 1459), Maria, Joan and Estefania, the latter two by Isabel Martínez de Vera. Joan Roís de Corella was widel…
"Tea for two": the Archive of the Italian Latinity of the Middle Ages meets the CLARIN infrastructure
2020
This paper aims at showing how integrating the Archive of the Italian Latinity of the Middle Ages (ALIM) into the ILC4CLARIN repository can provide mutual benefits. Making ALIM available to a large community of scholars and researchers, on the one side, represents the first step to reduce the lack of resources for Medieval Latin in CLARIN and, on the other side, constitutes an unprecedented contribution to not only linguistic investigations, but also to the studies of the culture and science at the basis of the Western European society. The paper describes the adopted approach aiming to keep intact the structure of the archive and its metadata, which are both accurately mirrored into the IL…
Document Word Clouds: Visualising Web Documents as Tag Clouds to Aid Users in Relevance Decisions
2009
Περιέχει το πλήρες κείμενο Information Retrieval systems spend a great effort on determining the significant terms in a document. When, instead, a user is looking at a document he cannot benefit from such information. He has to read the text to understand which words are important. In this paper we take a look at the idea of enhancing the perception of web documents with visualisation techniques borrowed from the tag clouds of Web 2.0. Highlighting the important words in a document by using a larger font size allows to get a quick impression of the relevant concepts in a text. As this process does not depend on a user query it can also be used for explorative search. A user study showed, th…
Bibliotēka un sabiedrība, 3
2002
Krājumā ievietoti raksti, kuros aplūkoti jauni virzieni informācijas izplatībā un bibliotēku darbībā, kā arī informācijas sakārtošanā un apstrādē. Atsevišķos rakstos analizētas vēsturiskas parādības. Raksti izkārtoti četrās tematiskās iedaļās: "Grāmata vērtību sistēmā", "Bibliotēku vēstures pētījumi", "Publiskās bibliotēkas mūsdienu sabiedrībā" un "Informācijas avotu apstrādes problēmas".
Avoimuudella on merkitystä! Kirjaston julkaisuyksikkö Jyväskylän yliopiston vaikuttavuuden edistäjänä
2012
Julkaisuyksikkö on toimintansa alusta alkaen tähdännyt Jyväskylän yliopiston näkyvyyden ja menestymisen sekä tieteen avoimuuden tukemiseen. Pekka Olsbo käy artikkelissaan läpi julkaisuyksikön toiminnan keskeisiä virstanpylväitä. Julkaisuyksikkö on vuosien saatossa vakiinnuttanut asemansa yliopiston keskeisenä palveluyksikkönä. Yliopistossa tuotettavien moninaisten digitaalisten aineistojen verkkojulkaisemisen myötä se myös jatkaa työtään kansallisen open access -työn eturintamassa. nonPeerReviewed