Finite element simulation of semi-finishing turning of Electron Beam Melted Ti6Al4V under dry and cryogenic cooling

open6noIn the last few years, important step forwards have been made on Finite Element Simulation of machining operations. Wrought Ti6Al4V alloy has been deeply investigated both numerically and experimentally due to its wide application in the industry. Recently, Additive Manufacturing technologies as the Electron Beam Melting and the Direct Melting Laser Sintering are more and more employed in the production of biomedical and aeronautical components made of Ti6Al4V alloy. Fine acicular microstructures are generated by the application of additive manufacturing technologies, affecting the mechanical properties and the machinability. By the consequence, this peculiarity has to be considered in modelling the material behaviour. In this work, a numerical analysis of cylindrical external turning on Electron Beam Melted (EBM) Ti6Al4V alloy is presented. A Johnson-Cook constitutive equation was implemented as a flow stress model and adapted with respect to the wrought Ti6Al4V alloy. The model was calibrated and validated through the cutting forces and temperatures measurements acquired under dry and cryogenic lubricating conditions.openBordin, A; Imbrogno, S.; Rotella, G.; Bruschi, S.; Ghiotti, A.; Umbrello, D.Bordin, Alberto; Imbrogno, S.; Rotella, G.; Bruschi, Stefania; Ghiotti, Andrea; Umbrello, D

Diffusion Enhancement in Core-softened fluid confined in nanotubes

We study the effect of confinement in the dynamical behavior of a core-softened fluid. The fluid is modeled as a two length scales potential. This potential in the bulk reproduces the anomalous behavior observed in the density and in the diffusion of liquid water. A series of $NpT$ Molecular Dynamics simulations for this two length scales fluid confined in a nanotube were performed. We obtain that the diffusion coefficient increases with the increase of the nanotube radius for wide channels as expected for normal fluids. However, for narrow channels, the confinement shows an enhancement in the diffusion coefficient when the nanotube radius decreases. This behavior, observed for water, is explained in the framework of the two length scales potential.Comment: 17 pages, 8 figures, accept for publication at J. Chem. Phy

Curso clínico e prognóstico do transtorno obsessivo-compulsivo

The long-term course and prognosis of obsessive-compulsive disorder (OCD) is insufficiently known. To identify predictors of OCD course, follow-up studies of patients with OCD were reviewed and their findings summarized. According to these studies, the following variables were correlated with poor outcome: early onset, severity of OCD symptoms, chronic course, poor social functioning at baseline, lifetime history of comorbid psychiatric and personality disorders, presence of parental Axis I psychiatric diagnosis, and delayed response to serotonin reuptake inhibitors in the beginning of the treatment. Due to the availability of new treatments, most patients with OCD can expect significant improvement, but not complete remission of the disorder. The reviewed follow-up studies support previous reports on the chronicity of OCD.Universidade Federal de São Paulo (UNIFESP) Escola Paulista de Medicina Departamento de PsiquiatriaUniversidade Federal de São Paulo (UNIFESP) Escola Paulista de Medicina Grupo Inter-Departamental de Epidemiologia ClínicaUNIFESP, EPM, Depto. de PsiquiatriaUNIFESP, EPM, Grupo Inter-Departamental de Epidemiologia ClínicaSciEL

Caracterização dos estádios de desenvolvimento do girassol e sua relação com alguns parâmetros climáticos.

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Maternal recognition of child mental health problems in two Brazilian cities

Objective: To identify child behaviors and types of impairment that increase the likelihood of maternal recognition of emotional/behavioral problems (EBP) in children and adolescents. Methods: Maternal-reported data were obtained from two subsamples of 11-to-16-year-olds derived from cross-sectional studies conducted in two Brazilian municipalities: Itaborai, state of Rio de Janeiro (n=480), and Embu, state of Sao Paulo (n=217). The Itaborai study involved a representative sample of 6-to-16-year-olds (n=1,248response rate = 86.0%) selected from the Family Health Program registry, which covered 85.5% of the municipal population. The Embu study was based on a probabilistic sample of clusters of eligible households (women aged 15-49 years, child < 18 years), with one mother-child pair selected randomly per household (n=813response rate = 82.4%). The outcome variable was mother's opinion of whether her child had EBP. Potential correlates included types of child behaviors (hyperactivity/conduct/emotional problems as isolated or combined conditions) and impairment, assessed using the Strengths and Difficulties Questionnaire (SDQ)child's age and gendermaternal education and anxiety/depression (assessed using the Self-Reporting Questionnaire [SRQ]). Results: Multivariate regression models identified the following correlates of maternal perception of child EBP: comorbidity (co-occurring hyperactivity/conduct/emotional problems), emotional problems alone, and interference of problems with classroom learning and friendships. Conclusion: Comorbidity of different problem types, emotional problems alone, and interference with classroom learning and friendships increase the likelihood of maternal recognition of EBP in children.Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPqMCT/CNPq/CT-Saude/MS/SCTIE/DECIT grant) [33/2008]Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP) [00/14555-4]Univ Fed Sao Paulo UNIFESP, Dept Psiquiatria, Sao Paulo, SP, BrazilUniv Cambridge, Dept Psychiat, Cambridge, EnglandUniv Fed Pelotas, Programa Posgrad Epidemiol, Pelotas, RS, BrazilUniv Fed Sao Paulo UNIFESP, Dept Psiquiatria, Sao Paulo, SP, BrazilCNPqMCT/CNPq/CT-Saude/MS/SCTIE/DECIT grant) [33/2008]FAPESP [00/14555-4]Web of Scienc

LEAP Works! Outcomes of a Family-Based Nutrition Education and Physical Activity Promotion Program

Overweight is an endemic public health concern for children, adolescents, and adults. Reducing the prevalence of childhood overweight is a national health objective and nine million U.S. children, currently classified as overweight, require effective nutrition education and physical activity promotion services. The intent of this study was to evaluate the effectiveness of a family-based nutrition education and physical activity promotion program, Lifelong Eating and Activity Patterns (LEAP), as an effective approach for the prevention and treatment of child overweight. The study design was an eight-week intervention and participant files were analyzed retrospectively to ascertain information for the study variables. The main outcome measures were changes in body mass index (BMI), percent body fat, fitness level, and eating and activity behaviors for child and parent participants. Qualitative data gathered from an exit survey for both children and parents were used to assess perceived benefits, value, and effectiveness of the program. Participants included 107 boys (n=48) and girls (n=59) ages 7-14, mean age 10.6 years, and their accompanying parents. The child participants were either “at risk for overweight” (3%) or “overweight” (97%). The results showed a significant decrease in BMI for both child and parent participants and percent body fat for child participants. There was a significant increase in reported fruit and vegetable consumption, regular physical activity, and in fitness parameters for both child and parent participants. The qualitative exit survey results indicated that the LEAP program resulted in significant improvements in knowledge, attitude, and behavior. In conclusion, this family-based nutrition education and physical activity promotion program was effective in decreasing BMI and body fat, increasing fitness level, and eliciting positive changes in eating and activity attitudes and behavior in both child and parent participants

Avaliação da vacina Circovac(r) no controle da síndrome da circovirose suína (SCS) em condições de campo no Brasil.

bitstream/item/58046/1/CUsersPiazzonDocuments473.pdfProjeto/Plano de Ação: 03.07.51.900-07

Professional and informal help-seeking among low-income adolescents exposed to violence in the community and at school

Background - Adolescents may seek help for many reasons beyond health needs, such as personal stress due to violence exposure. Objective -To investigate factors associated with receiving professional assistance and informal help due to violence exposure in the community and at school. Participants and setting - This study was conducted in Itaboraí, a low-income medium-size city in the State of Rio de Janeiro, Southeast Brazil, characterized by poverty, inequality and violence. It analyses data reported by 669 in-school adolescents (11–15-years, 51.7% girls). Methods - This is a cross-sectional study nested in a longitudinal study (Itaboraí Youth Study). The Itaboraí Youth Study involved a probabilistic community-based sample of 1409 6-to-15-year-olds based on a 3-stage probabilistic sampling plan that included a random selection of census units, eligible households and the target child. Results - Professional assistance was mainly received from psychologists (the Brazilian population has free access to health services). Family members were the main source of informal help. Correlates of professional assistance were having clinical emotional problems and not counting on an adult (if needing help) for community violence victims, and absent father for community and school violence victims. Correlates of informal help were female sex, maternal anxiety/depression and absent father for community violence victims, and younger age and higher maternal education for school violence victims. Conclusions - The mental health needs of violence victims, and maternal difficulties to deal with the adolescent distress resulting from violence exposure (maternal increased burden due to father absence and/or having anxiety/depression) are important influences on the help-seeking process

Change of Interest as a Function of Shift in Curricular Orientation

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/67119/2/10.1177_001316445301300213.pd