Single Bunch Instabilities in FCC-ee

FCC-ee is a high luminosity lepton collider with a centre-of-mass energy from 91 to 365 GeV. Due to the machine parameters and pipe dimensions, collective effects due to electromagnetic fields produced by the interaction of the beam with the vacuum chamber can be one of the main limitations to the machine performance. In this frame, an impedance model is required to analyze these instabilities and to find possible solutions for their mitigation. This paper will present the contributions of specific machine components to the total impedance budget and their effects on the beam stability. Single bunch instability thresholds will be estimated in both transverse and longitudinal planes

Topological Yang-Mills cohomology in pure Yang-Mills Theory

Using the first order formalism (BFYM) of the Yang-Mills theory we show that it displays an embedded topological sector corresponding to the field content of the Topological Yang-Mills theory (TYM). This picture arises after a proper redefinition of the fields of BFYM and gives a clear representation of the non perturbative part of the theory in terms of the topological sector. In this setting the calculation of the $vev$ of a YM observable is translated into the calculation of a corresponding (non topological) quantity in TYM. We then compare the topological observables of TYM with a similar set of observables for BFYM and discuss the possibility of describing topological observables in YM theory.Comment: 12 pages, Latex, one reference added, to appear in Phys. Lett.

Coupling impedances and collective effects for FCC-ee

A very important issue for the Future Circular Collider (FCC) is represented by collective effects due to the selfinduced electromagnetic fields, which, acting back on the beam, could produce dangerous instabilities. In this paper we will focus our work on the FCC electron-positron machine: in particular we will study some important sources of wake fields, their coupling impedances and the impact on the beam dynamics. We will also discuss longitudinal and transverse instability thresholds, both for single bunch and multibunch, and indicate some ways to mitigate such instabilities

Aplicação de tecnologias de inteligência artificial e de realidade virtual para a construção de um ambiente virtual para a alfabetização infantil /

Dissertação (Mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico.Neste texto apresentamos os resultados sobre a busca de novas metodologias para auxiliar na alfabetização infantil. A proposta respaldada-se em uma fundamentação científica tendo como base dois aspectos fundamentais: o pedagógico e as novas tecnologias. O modelo deverá ser inovador e que represente efetivamente um avanço, contribuindo para a solução de um dos problemas mais sérios do ensino no Brasil: o elevado índice de repetência e de evasão registrado nas séries iniciais de ensino. A nossa proposta está baseada na metodologia de alfabetização desenvolvida pelos professores do GEEMPA (Grupo de Estudos sobre Educação, Metodologia de Pesquisa e Ação), sob coordenação de Esther P. Grossi. Esta metodologia foi inspirada no Método Silábico de alfabetização desenvolvido por Emília Ferreiro. Os resultados obtidos pelo GEEMPA em Porto Alegre e a credibilidade internacional das criadoras desta metodologia garantem o respaldo pedagógico necessário. Para a implementação da proposta utilizaremos técnicas de Realidade Virtual para a construção de um ambiente suficientemente capaz de envolver o aluno, povoado por agentes que comandarão o processo, conduzindo o aluno para o mundo das letras de forma agradável e praticamente imperceptível

As bibliotecas na ensino à distância: uma revisão de literatura

Revisão de literatura sobre conceitos de bibliotecas no suporte para a educação a distância. Apresenta conceitos referentes a bibliotecas digitais, eletrônicas e virtuais. Tece considerações sobre o trabalho virtual nas bibliotecas.Literature review about some library concepts to support distance education. Presents some concepts about digital, electronic and virtual libraries. Also considerated the virtual work at the libraries

Effects of Eight-Week Circuit Training with Core Exercises on Performance in Adult Male Soccer Players

Core exercises have been widely promoted in the last 25 years. However, the scientific debate about its efficacy for improving individual and team sports performance is still open. Thus, the present study aims to investigate the effects of circuit training with a core exercise program on physical performance in competitive amateur soccer players. The training was conducted during the off-season period, two times per week for 8 weeks. Pre- and post-evaluations were conducted using the following tests: Y-Balance Test (YB), standing long jump (SLJ), medicine ball chest press (MBC), curl-up (CU), and Illinois Agility Test (IAT). A total of 19 adults were divided into an experimental group (EG, n = 11, age 22 years, weight 71.2 ± 4.8 kg, height 174 ± 5.8 cm) and a control group (CG, n = 8, age 22 years, weight 73.2 ± 4.1 Kg, height 176 ± 6.3 cm). The EG showed significant improvements in lower and upper body strength, core endurance and balance, whereas the CG did not report significant changes in the pre- and post-test comparison. Despite study limitations, our positive results show that circuit training with core exercises appears to be a good strategy for performance improvement in adult soccer player

Aplicação de "DESIGN PATTERNS" e LIGHTWEIGHT FRAMEWORKS" no desenvolvimento de aplicações orientadas a objetos reutilizáveis : S.C.O - sistema de controle de ocorrências

Orientador: Mauro José BelliMonografia (graduação) - Universidade Federal do Paraná, Escola Técnica, Curso de Tecnologia em InformáticaInclui bibliografi

Is Two Better Than One? The Impact of Doubling Training Volume in Severe COPD: A Randomized Controlled Study

Patients with severe chronic obstructive pulmonary disease (COPD) are unable to exercise at high intensities for sufficiently long periods of time to obtain true physiological training effects. It therefore appears sensible to increase training duration at sub-maximal exercise intensities to optimize the benefit of exercise training. We compared the effects on exercise tolerance of two endurance cycloergometer submaximal exercise protocols with different cumulative training loads (one (G1) versus two (G2) daily 40 min training sessions) both implemented over 20 consecutive days in 149 patients with COPD (forced expiratory volume at first second (FEV1): 39% predicted) admitted to an inpatient pulmonary rehabilitation program. Patients in G2 exhibited greater improvement (p = 0.011) in submaximal endurance time (from 258 (197) to 741 (662) sec) compared to G1 (from 303 (237) to 530 (555) sec). Clinically meaningful improvements in health-related quality of life, 6MWT, and chronic dyspnea were not different between groups. Doubling the volume of endurance training is feasible and can lead to an additional benefit on exercise tolerance. Future studies may investigate the applicability and benefits of this training strategy in the outpatient or community-based pulmonary rehabilitation settings to amplify the benefits of exercise interventions

Sistema DOCBOARD : sistema de gerenciamento de documentos

Orientador: Mauro José BelliMonografia (graduação) - Universidade Federal do Paraná, Escola Técnica, Curso de Tecnologia em InformáticaInclui bibliografi