PROJETO DE UM SISTEMA DE MEDIÇÃO E CONTROLE DE TEMPERATURA DE BAIXO CUSTO PARA SER UTILIZADO NA ETAPA DE MOSTURAÇÃO DO PROCESSO DE FABRICAÇÃO DE CERVEJAS ARTESANAIS

O controle de variáveis em determinados processos é um fator determinante para a obtenção de um produto final de alta qualidade e seu sucesso depende do desenvolvimento de métodos apropriados de automação. Neste trabalho, um sistema de baixo custo foi desenvolvido para controlar a temperatura do processo de mosturação. Utilizando a plataforma Arduino e um conjunto de sensores, foi montado um programa para controlar a entrega de calor gerado pela resistência elétrica utilizada para aquecimento do fluido, garantindo o controle da faixa de temperatura necessária ao processo de aquecimento. Os resultados mostraram a viabilidade de utilização do método, uma vez que o controle de temperatura foi adequado para o uso da cerveja artesanal, com baixo custo e facilidade de implementação

Efeito heterótico sobre o desempenho e medidas corporais de novilhos confinados

The objective of this study was to evaluate the heterotic effect on performance and body measurements of Charolais (Ch) and Nellore (Ne) steers and crossbreeds from the fifth (21/32Ch 11/32Ne; 21/32Ne 11/32Ch) e sixth (43/64Ch 21/64Ne; 43/64Ne 21/64Ch) generation, feedlot finished. For initial weight, the heterotic effect was 45.9 and 39.1 kg in the fifth and sixth generation, and 41.6 and 38.1 kg for the fi nal weight, respectively, in the same order. For the average daily gain, the heterotic effect was significant in the fifth generation (0.18 kg). Heterotic effect was observed in the initial rump height in the fifth generation (6.14 cm), and in the fifth and sixth generation on final rump height, with values of 5.57 and 4.75 cm, respectively, taking into account the heterotic effect. In relation to withers height, the heterotic effect was significant on fifth and sixth generations for the initial measurement, 7.36 and 7.12 cm, respectively, and finally, 5.19 and 4.33 cm, in the same order, and on withers growth on sixth generation (-2,79 cm). For the initial length, the heterotic effect was 7.60 and 5.72 in the fifth and sixth generations, and negative in fifth (-5.29 cm) and sixth (-3.75 cm) generations for the length of growth. For thoracic perimeter, on initial measurement heterotic effect was observed on both generations, being 10.2 cm on the fifth and 8.05 on the sixth generation, however for the final measurement the heterotic effect was significant only on the fifth generation (6.00 cm). The initial measurement with the highest correlation with the average daily gain was the length (r=0.47; p=0.0007), and with the final weight was the thoracic perimeter (r=0.89; p<0,0001).Objetivou-se avaliar o efeito heterótico sobre o desempenho e medidas corporais de novilhos do cruzamento entre as raças Charolês (Ch) e Nelore (Ne) e cruzados entre essas raças de quinta (21/32Ch 11/32Ne; 21/32Ne 11/32Ch) e sexta (43/64Ch 21/64Ne; 43/64Ne 21/64Ch) gerações, terminados em confinamento. Para o peso inicial, o efeito heterótico foi de 45,9 e 39,1 kg na quinta e sexta gerações, respectivamente, e de 41,6 e 38,1 kg para o peso final, na quinta e sexta gerações, citados na mesma ordem. Para o ganho médio diário, o efeito heterótico foi significativo na quinta geração do cruzamento (0,18 kg). Houve efeito heterótico para a altura de cernelha inicial na quinta geração (6,14 cm), e na quinta e sexta gerações na medida final de altura de cernelha, com valores de 5,57 e 4,75 cm, respectivamente. Com relação à altura de garupa, o efeito heterótico foi significativo na quinta e sexta gerações para as medidas iniciais, 7,36 e 7,12 cm e final, 5,19 e 4,33 cm, respectivamente, citados na mesma ordem, e para ganho em altura de garupa na sexta geração (-2,79 cm). Para comprimento inicial, o efeito heterótico foi, respectivamente, de 7,60 e 5,72 cm na quinta e sexta gerações, e negativo na quinta (-5,29 cm) e na sexta (-3,75 cm) gerações para o ganho em comprimento. Para as mensurações do perímetro torácico, na medida inicial houve efeito heterótico em ambas as gerações avaliadas, sendo de 10,2 cm na quinta geração e 8,05 cm na sexta geração, ao passo que para a medida fi nal o efeito heterótico foi significativo apenas na quinta geração (6,00 cm). A medida inicial melhor correlacionada ao ganho médio diário de peso foi o comprimento, com r=0,47 e p=0,0007, e com o peso final o perímetro torácico (r=0,89; p<0,0001)

The prevalence of physical inactivity amongst brazilian university students: its association with sociodemographic variables

Objective The prevalence of physical inactivity amongst adults has been increasing worldwide; however, few studies have been conducted on university freshmen. The present investigation was aimed at determining the prevalence of physical inactivity amongst Brazilian university freshmen and its association with sociodemographic variables. Methods The database for the research project entitled, “Evaluating health-related physical fitness of students from the Federal University of Santa Catarina, Brazil,” was used for this study. A total of 762 students (445 males) having 20.2 (4.7) mean age were studied. The participants’ level of physical activity was measured by IPAQ; sociodemographic variables were self-reported and then recorded. The chi-square test and binary logistic regression were used for statistical analysis (significance level was set at

Sociodemographic determinants of university students’ lifestyles

Objective It has been observed during recent decades that a large percentage of the population has an inadequate lifestyle and that there is a need for identifying factors determining such behavior pattern. This study was thus aimed at determining the association between lifestyle and sociodemographic variables of freshmen attending a state university in southern Brazil.Methods The sample consisted of 716 students (59.6 % female). The Fantastic questionnaire was used for evaluating the students’ lifestyles; their lifestyle was classified as being suitable or inadequate. The sociodemographic variables of interest were gender, age group ( and lt;20 and ≥20 years), paid work (yes or no), maternal education (≤4 years of study, 5-8 years and ≥9 years), study shift (daytime or night-time) and marital status (single and married). Binary logistic regression was used for determining associations between lifestyle and sociodemographic characteristics (p and lt;0.05 being significant).Results Inadequate lifestyle prevalence was 5.3 %. Adjusted analysis results indicated that students over 20 years-old (OR=2.87: 1.37-6.03 95 %CI) whose mothers’ formal education had lasted less than nine years (OR=2.23: 1.29-3.88 95 %CI) had a higher risk of having an inadequate lifestyle.Conclusion These findings may be useful for developing university healthcare promotion programs, paying special attention to older freshmen whose mothers have had less formal education

Imagem corporal em universitários: associação com estado nutricional e sexo. doi: http://dx.doi.org/10.5016/1980-6574.2010v16n1p78

The present study investigated the body image (BI) of university students and its association with nutritional status and gender. A total of 874 students (504 men), with a mean age of 20.66 (5.48) years, participated in the study. Self-reported body weight and height were used for the calculation of BMI. Body image was evaluated using the body silhouette scale proposed by Stunkard. Associations were analyzed using the chi-square test, with pO presente estudo investigou a imagem corporal (IC) em universitários e sua relação com o estado nutricional e o sexo. Participaram do estudo 874 universitários (504 homens), com média de idade de 20,66 (5,48) anos. O peso corporal e a estatura autorelatados foram utilizados para o cálculo do IMC. A IC foi avaliada através da escala de silhuetas corporais proposta por Stunkard. O teste do qui-quadrado foi utilizado para verificar associações, considerando

Body image dissatisfaction and its relationship with physical activity and nutritional status in university students

The aim of the present study was to evaluate the association of body image dissatisfaction with physical activity level and nutritional status in freshmen from a public Brazilian university. A total of 832 university students (485 men) with a mean age of 20.1 years (standard deviation = 4.6) participated in the study. Self-reported body weight and height were used for the calculation of body mass index. The students responded to the Body Shape Questionnaire and International Physical Activity Questionnaire. Data were analyzed using Fisher’s exact test, considering p < .05. The prevalence of body image dissatisfaction and physical inactivity was 10.1% and 14.5%, respectively. No significant association was observed between body image dissatisfaction and physical activity level. Body image dissatisfaction was associated with nutritional status in both genders (p < .05). University students with excess body weight should be encouraged to pursue a healthier lifestyle in order to promote an adequate nutritional status and also to improve their body image