Abstract At age 101, Walter Munk passed away in 2019. His groundbreaking discoveries will still guide and amaze oceanography students for years to come. Here, we perceive patterns in rotating tank with Munk's circulation theory aided by a Lagrangian particles tracking algorithm and numerical modeling. From information captured by video, we track the trajectories of drifters, and then objectively mapped the streamfunction to obtain the mean circulation pattern. We were able to reproduce the wind-forced anticyclonic and asymmetric gyre, including the western boundary intensification and its retroflection. The latter phenomenon was predicted by the non-linear version of Munk's model and observed in real subtropical gyres as small recirculation regions. We have configured two numerical model simulations mimicking the physical experiment, with linear and non-linear terms. The comparison between the numerical and physical experiments confirmed the effect of non-linear distortion of the gyre. Geophysical fluid dynamics is often hard to visualize, and counter-intuitive in a rotating system. We present this set of experiments as a tool for oceanography teaching. Besides studying general ocean circulation theories and observations through practical examples, this experiment provides an opportunity to develop basic image processing and geophysical modelling skills.

A técnica "Switch Back" consiste em oscilar a tocha durante a soldagem na direção do cordão e não transversalmente. Entretanto, pouco se conhece a respeito dos aspectos metalúrgicos do metal de solda depositado por essa técnica. Assim, neste trabalho é apresentado um estudo qualitativo do efeito do ângulo de ataque da tocha e do comprimento de reversão sobre a estrutura de solidificação do cordão. As soldagens foram realizadas com o processo MIG/MAG Pulsado sobre chapas de aço com baixo teor de carbono. Os resultados mostraram que os parâmetros analisados modificam a forma de como a solidificação do cordão se realiza. No geral, quando o ângulo da tocha exerce o movimento empurrando-puxando, favorece-se a formação de grãos equiaxiais próximo à linha de fusão. Quanto ao comprimento de reversão, o seu aumento propicia o refino destes grãos.

The welding technique denominated switch-back technique consists in a torch oscillation in the welding direction rather than transversally. However, there is not much information in literature about the solidification structure of the bead when this technique is applied. Therefore, in this work is presented a study on the effect of the torch leading angle and of the reversion course length over the bead solidification structure. Welds were carried out with Pulsed MIG/MAG Process on plain carbon steel plates. The results showed that the parameters under analysis modify the solidification mode of the bead. In general, when the angle of torch leads to pushing-pulling movement, equiaxial grains near the fusion line is favored. In relation to the course length, its increase leads to finer solidification structure.

Objetivou-se avaliar os parâmetros fisiológicos, hematológicos e bioquímicos de equinos de concurso completo de equitação consumindo dieta contendo óleo de soja e submetidos a testes de esforço físico. Foram utilizados 12 equinos em delineamento experimental inteiramente casualizado, com duas dietas e seis repetições. As dietas utilizadas foram: dieta sem inclusão de óleo de soja (controle); dieta com inclusão de 10% de óleo de soja. O ensaio teve duração de 82 dias e incluiu três testes de esforço físico: ao início, no 60º e no 82º dia. Em cada teste, foram realizadas cinco coletas de dados: antes do teste com os animais em repouso; imediatamente após o teste; e 10, 20 e 120 minutos após os testes. Foram avaliadas a temperatura corporal e a frequência cardíaca e realizadas coletas de amostras de sangue para análises hematológicas e bioquímicas. Os valores médios dos parâmetros fisiológicos, hematológicos e bioquímicos foram submetidos à análise não-paramétrica. Somente ao longo do tempo de consumo das dietas, a inclusão do óleo de soja somente alterou a concentração de γ-glutamil transferase (GGT) e creatinina. O tempo de treinamento físico tem efeito no condicionamento dos equinos, que melhora com a redução da concentração de lactato, e na concentração de glicose, que aumentou no teste de esforço físico.

The objective of this study was to the evaluate physiological, hematological and biochemical parameters of eventing horses fed diets containing soybean oil and submitted to physical effort tests. Twelve horses were used in a completely randomized design with two diets and six replications. The diets used were: diet without soybean oil inclusion (control) and diet with inclusion of 10% soybean oil. The experiment lasted 82 days, with three exercise tests: at the beginning, 60th and 82th day of the experiment. There were five data collections for each test: before the test with the horses at rest, immediately after the test, and at 10, 20 and 120 minutes after each test. Body temperature and rate heart were taken and blood samples were collected to evaluate hematological and biochemical variables.The mean values of the physiological, metalogical and biochemical parameters were submitted to non-parametric analysis.The inclusion of soybean oil only altered the γ-glutamyltransferase (GGT) and creatinine concentration in function time of intake of the diet. There was effect of trainings time on the horses conditioning that improved with reduction in the lactate concentration while the glucose concentration increased at the last exercise test.