Search results for " method"
showing 10 items of 10455 documents
First measurement of the Sivers asymmetry for gluons using SIDIS data
2017
The Sivers function describes the correlation between the transverse spin of a nucleon and the transverse motion of its partons. It was extracted from measurements of the azimuthal asymmetry of hadrons produced in semi-inclusive deep inelastic scattering of leptons off transversely polarised nucleon targets, and it turned out to be non-zero for quarks. In this letter the evaluation of the Sivers asymmetry for gluons in the same process is presented. The analysis method is based on a Monte Carlo simulation that includes three hard processes: photon-gluon fusion, QCD Compton scattering and leading-order virtual-photon absorption process. The Sivers asymmetries of the three processes are simul…
Interaction of hadrons and tests for the nature of resonances
2016
El propósito de esta Tesis es contribuir al extenso esfuerzo que se ha hecho, en las ultimas décadas, a fin de entender la estructura de las partículas hadrónicas, uno de los temas más importantes en física hadrónica. En los años 50, el desarrollo de los aceleradores de partículas reveló la existencia de una gran cantidad de nuevas resonancias. La proliferación de partículas, poco después, manifestó un patrón, y un esquema de organización para describirlo se hizo necesario. Al principio, se encontró una solución generalizando el concepto de isospín con el modelo de Fermi-Yang de 1959, en el que el protón y el neutrón aparecen como bloques fundamentales y las otras partículas como sus combin…
Managing complexity in global IT projects
2017
Projektien hallintaan kuuluu paljon erilaisia osa-alueita, joita projektipäällikön ja korkeamman tason henkilöstön tulee ottaa huomioon ennen projektin alkua ja sen aikana. Projektin kompleksisuus nousee kuitenkin erittäin korkealle ta-solle, kun kyseessä on kansainvälinen IT-projekti. Tämän kaltaisissa projek-teissa on useita osa-alueita, jotka voivat vaikuttaa kriittisesti niiden onnistumi-seen. Tämä tutkimus keskittyy havainnoimaan, mistä asioista kompleksisuus koostuu globaalien IT-projektien tapauksessa, miten se linkittyy kompleksi-suusteoriaan ja miten tätä kompleksisuutta kyetään hallitsemaan. Tekotapana tässä tutkimuksessa on kirjallisuuskatsaus. Kirjallisuus on kerätty kirjastoist…
Analysis of oscillations in discontinuous Lurie systems via LPRS method
2019
We discuss advantages and limitations of the harmonic balance method and the locus of a perturbed relay system (LPRS) method in the problem of finding periodic oscillations. In this paper we present the results of using harmonic balance method and LPRS method while investigating a 3rd order dynamic system in Lurie form. In this system a symmetric periodic oscillation is found, while other two asymmetric periodic motions are not found using both methods. peerReviewed
Fight against cancer in Italy: What patients, caregivers and healthy citizens think about care delivery from National Health System
2022
Objective: This survey aimed to analyse healthy citizens (HC), cancer patients and their caregivers (CP&CG) perception about cancer care among six different Italian regions. Methods: The survey for HC was conducted by a multinational market research institute (IPSOS) through a computer-assisted web interviewing system, using a dataset of people who had consented to be interviewed for previous studies. CP&CG were interviewed by patient advocates using paper questionnaires. Results: HC completed 1831 questionnaires between May and June 2019; CP&CG filled 1779 questionnaires between May and October 2019. 55% of all interviewees felt they were adequately informed about cancer, with …
Quantum and classical dynamics of heavy quarks in a quark-gluon plasma
2018
We derive equations for the time evolution of the reduced density matrix of a collection of heavy quarks and antiquarks immersed in a quark gluon plasma. These equations, in their original form, rely on two approximations: the weak coupling between the heavy quarks and the plasma, the fast response of the plasma to the perturbation caused by the heavy quarks. An additional semi-classical approximation is performed. This allows us to recover results previously obtained for the abelian plasma using the influence functional formalism. In the case of QCD, specific features of the color dynamics make the implementation of the semi-classical approximation more involved. We explore two approximate…
Review of Particle Physics
2020
The Review summarizes much of particle physics and cosmology. Using data from previous editions, plus 2,143 new measurements from 709 papers, we list, evaluate, and average measured properties of gauge bosons and the recently discovered Higgs boson, leptons, quarks, mesons, and baryons. We summarize searches for hypothetical particles such as supersymmetric particles, heavy bosons, axions, dark photons, etc. Particle properties and search limits are listed in Summary Tables. We give numerous tables, figures, formulae, and reviews of topics such as Higgs Boson Physics, Supersymmetry, Grand Unified Theories, Neutrino Mixing, Dark Energy, Dark Matter, Cosmology, Particle Detectors, Colliders, …
Shape coexistence in neutron-deficient Hg isotopes studied via lifetime measurements in Hg-184,Hg-186 and two-state mixing calculations
2014
Abstract: The neutron-deficient mercury isotopes, 184 , 186 Hg, were studied with the recoil distance Doppler-shift method using the Gammasphere array and the K ̈ oln plunger device. The differential decay curve method was employed to determine the lifetimes of the yrast states in 184 , 186 Hg. An improvement on previously measured values of yrast states up to 8 + is presented as well as first values for the 9 3 state in 184 Hg and 10 + state in 186 Hg. B ( E 2) values are calculated and compared to a two-state mixing model which utilizes the variable moment of inertia model, allowing for extraction of spin-dependent mixing strengths and amplitudes. peerReviewed
Indicadores para la Evaluación de las Instituciones Universitarias: Validación a través del Método Delphi
2012
Artículo distribuido bajo una licencia de uso y distribución “Creative Commons Reconocimiento-No Comercial 3.0 España”.
Mathematical modelling of sustainable bioresidual concrete
2019
In the production of cement, which is the main component of concrete production, the process generates about 5% of the global carbon dioxide emissions. In addition, bioproduct and pulp mills produce signi_cant quantities of soda ash and bio-ash, which is still largely unused. In this paper we will introduce our study related to improving the environmental friendliness of concrete used in construction by utilizing pulp mill waste while its long-term durability and strength and porosity properties meet the goals set for construction. The project `sustainable bioresidual concrete' is on-going and only preliminary numerical results with measurements are presented here. peerReviewed