1,721,323 research outputs found
Cineaffetti. Memoria e creatività degli spettatori in mostra
Full text linkEsposizione svoltasi alla galleria d'arte moderna e contemporanea di Bergamo, GaMeC, dal 13 novembre al 13 dicembre 2015. Primo esito di una ricerca, coordinata da Barbara Grespi, dal titolo "Alla riscoperta dello spettatore cinematografico. Memorie di carta e scenari digitali (anni 2015-2016)" (capofila: Università di Bergamo, in partnership con Lab 80, Accademia Carrara, GAMeC, Servizi Bibliotecari urbani). Durata della ricerca: biennale (dal novembre 2014 al novembre 2016). L'esposizione ha previsto l'allestimento di un luogo che simulava lo spazio domestico all'interno del quale sono state messe in scena le memorie dello spettatore, sia quando si trattava di opere d'arte (Bozzetto, Freno, Previtali, Lipari, Cometti), sia quando si trattava di collezioni private dello spettatore comune (biglietti, diari, gadget, merchandising et alia), sia in forma di montaggi video preparati dai curatori a partire dalla testimonianze degli spettatori e organizzate per spazi domestici
Topological Signatures and Quenches in One Dimensional Fermionic Systems
Full text linkL'abstract è presente nell'allegato / the abstract is in the attachmen
The multidimensional distribution of quarks and its flavor dependence
No full textOne of the primary goals of hadronic physics is to describe the internal structure of the nucleon in terms of its constituents, quarks and gluons (collectively referred to as partons). Over the past forty years, substantial information has been gathered regarding the one-dimensional distribution of partons, encoded in the well-established collinear Parton Distribution Functions (PDFs). Recently, research has been extended to explore the three-dimensional momentum space distribution of partons, described by the so-called Transverse Momentum Dependent Distributions (TMDs). This thesis focuses on the phenomenology of TMDs, with a particular emphasis on their flavor and spin dependence.
The thesis begins by reviewing the theoretical framework necessary for the extraction of TMDs in two types of scattering processes: the Drell–Yan process and Semi-Inclusive Deep Inelastic Scattering , along with the relevant theoretical background on TMDs.
It then presents the first global extraction of unpolarized quark TMDs in the proton, using a flavor-dependent approach at the highest level of accuracy, Next-to-Next-to-Next-to-Leading Logarithm (NLL). This result marks a milestone, as it demonstrates the distinct transverse momentum behavior of different quark flavors within the proton.
Subsequently a similar study is conducted for unpolarized TMDs in the pion, achieving the highest available accuracy (NLL) and providing an excellent fit to the experimental data, which indicates a potential distinction in the transverse momentum behavior between sea and valence quarks in pions.
The thesis also reports the first-ever extraction of helicity quark TMDs in the proton, performed at all orders of accuracy possible. This analysis reveals non-trivial differences compared to unpolarized distributions and exhibits partial agreement with lattice QCD calculations.
Finally, the thesis addresses the evolution equations for twist-3 PDFs, which are a crucial component for studying polarized TMDs, and introduces a numerical framework developed to solve these evolution equations computationally.One of the primary goals of hadronic physics is to describe the internal structure of the nucleon in terms of its constituents, quarks and gluons (collectively referred to as partons). Over the past forty years, substantial information has been gathered regarding the one-dimensional distribution of partons, encoded in the well-established collinear Parton Distribution Functions (PDFs). Recently, research has been extended to explore the three-dimensional momentum space distribution of partons, described by the so-called Transverse Momentum Dependent Distributions (TMDs). This thesis focuses on the phenomenology of TMDs, with a particular emphasis on their flavor and spin dependence.
The thesis begins by reviewing the theoretical framework necessary for the extraction of TMDs in two types of scattering processes: the Drell–Yan process and Semi-Inclusive Deep Inelastic Scattering , along with the relevant theoretical background on TMDs.
It then presents the first global extraction of unpolarized quark TMDs in the proton, using a flavor-dependent approach at the highest level of accuracy, Next-to-Next-to-Next-to-Leading Logarithm (NLL). This result marks a milestone, as it demonstrates the distinct transverse momentum behavior of different quark flavors within the proton.
Subsequently a similar study is conducted for unpolarized TMDs in the pion, achieving the highest available accuracy (NLL) and providing an excellent fit to the experimental data, which indicates a potential distinction in the transverse momentum behavior between sea and valence quarks in pions.
The thesis also reports the first-ever extraction of helicity quark TMDs in the proton, performed at all orders of accuracy possible. This analysis reveals non-trivial differences compared to unpolarized distributions and exhibits partial agreement with lattice QCD calculations.
Finally, the thesis addresses the evolution equations for twist-3 PDFs, which are a crucial component for studying polarized TMDs, and introduces a numerical framework developed to solve these evolution equations computationally
Global extraction of proton and pion Transverse Momentum Distributions
No full textWe present the most recent global analysis of unpolarized proton Transverse Momentum Dependent Parton Distribution Functions (TMD PDFs) and Fragmentation Functions (TMD FFs) derived from a diverse set of experimental datasets, including Semi-Inclusive Deep-Inelastic Scattering, Drell-Yan, and Z-boson production. Additionally, we present an extraction of the unpolarized pion TMD PDFs from all available data of unpolarized pion induced Drell–Yan processes. Both fits are performed at next-to-next-to-next-to-leading logarithmic (N3LL) accuracy
Reproducibility Report for the Paper: Efficient Non-Blocking Event Management for Speculative Parallel Discrete Event Simulation
No full textThis is a report on the reproducibility of the experiments in the paper "Efficient Non-Blocking Event Management for Speculative Parallel Discrete Event Simulation"presented at the 38th ACM SIGSIM conference on Principles of Advanced Discrete Simulation (PADS'24). The artifact got badges Artifacts Evaluated - Functional v1.1, Artifacts Available v1.1, and Results Reproduced v1.1. The Artifacts Evaluated Functional badge has been assigned since the artifact associated with the research is documented, consistent, complete, exercisable, and includes evidence of verification and validation. The Artifacts Available badge has been given since the authors made the artifact permanently available. Finally, the Result Replicated badge has been assigned because the results shown in the paper have been reproduced by persons other than the authors, using artifacts provided by the authors
A Possible Extension of the Generic AV DS to Incorporate Highlighting and Ordering Functionalities
No full textIn this document, we propose an extension for the MPEG-7 Generic DS [2]. We believe that some important functionalities for MPEG-7, not yet addressed by the actual DS, should deal with the capability to (1) highlight description items (e.g. images, sounds, events, objects etc.) most relevant to the purpose for which a certain content description of a multimedia (MM) document has been created and (2) the capability of description information ordering. In other words, due to a possible large amount of description items, an entity who will create descriptions of multimedia (MM) documents, according to MPEG-7 specification (i.e. a description provider), shall highlight certain items most representative for the kind of document being described in order to facilitate user queries. Besides we consider the need of providing users with ordering mechanisms a very relevant issue for MPEG-7. Such ordering mechanisms are derivable from descriptors (e.g. a set of key – frames ordered on the basis a color descriptor or a set of sounds ordered by means of a loudness D). However a possible large variety in the types of descriptors composing a description could lead to a consequent high number of ordering criteria to arrange description items. Therefore we propose that the description provider should also select a reduced set of descriptors allowing to order a subset of description elements (e.g. key frames, events etc.) pertinent to the MM document being described.
Our proposal consists in the incorporation in the current Generic Ds of two DSs covering the aforementioned functionalities. The document is organized as follows: in Section 2, we explain, after a quick overview of the current Generic DS, the motivation behind our proposals and in Section 3, we show the detailed structure of the DSs
Formalization and Animation of Business Process Collaborations.
No full textThe increasing adoption of modeling methods contributes to the better un-
derstanding of the flow of processes from the internal behavior of a single
organization to a wider perspective where several organizations exchange
messages. In this regard, the BPMN standard provides a suitable abstrac-
tion for modeling, analyzing, executing, and monitoring business processes
within the same organization or involving multiple ones.
Even if this is a widely accepted notation, a major drawback of BPMN
is related to the complexity of the semi-formal definition of its meta-model.
Moreover, only limited efforts have been expended in formalizing its exe-
cution semantics, especially for what concerns the interplay among control
features, data handling and exchange of messages in scenarios requiring mul-
tiple instances of interacting participants. Consequently, the modeling of a
BPMN diagram, as well as fully understanding of its behavior, may result
very difficult in presence of such concepts.
Thus, providing a formal semantics of the BPMN notation is crucial for
shaping collaborative systems and guaranteeing that these systems behave as
they are supposed to. Moreover, figuring out the interplay between control
flow, messages, and data, by looking at static process models, is in general
error-prone and time-consuming. In this regard, visualization techniques,
such as animation, can effectively support the designer. In addition, a formal
semantics gives the possibility to simulate business processes.
This thesis faces these problems by providing a formal semantics for
BPMN collaborations that includes elements dealing with multiple instances,
i.e., multi-instance pools and sequential/parallel multi-instance tasks. Be-
yond defining a novel formalization, the thesis proposes solutions that exploit
this formalization to dynamically visualize the behavior and the business con-
text of BPMN diagrams through 2D and 3D animation, and for generating event logs from the simulation of business processes
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