SIMULATION OF IN-CYLINDER RADIATIVE HEAT TRANSFER OF DIESEL ENGINE WITH MONTE-CARLO METHOD

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A behavior systems view of responding to probe stimuli during an interfood clock

Two experiments used a behavior systems approach to relate the form of responses during an interfood clock to the temporal distance of the individual clock stimuli to food. Stimuli proximate to food should better control a focal search mode and related responses, whereas stimuli temporally distant from food should better control a general search mode and related responses. Experiment 1 conditioned two groups of rats with a sequence of four equal-length 12-sec clock stimuli that terminated with food and then tested for the conditioning of a general search mode by presenting an unconditioned moving probe stimulus (either a rolling ball bearing or a rotating mechanical door) during each of the clock stimuli. Consistent with a behavior systems view, contact with the ball bearing was markedly greater during a clock stimulus distant from food. The absence of similar differential contact of the door across the clock stimuli showed that the effect was specific to the ball bearing rather than a general response to stimulus dimensions of movement and sound. Experiment 2 showed that the general search mode was controlled by the clock stimulus rather than the passage of time.     

Assessing the Impact of a Ceremony in Honor of the Body Donors in the Development of Ethical and Humanistic Attitudes among Medical Students

Activities related to body donation programs, such as donor memorial ceremonies, provide the opportunity to complement student training, especially with regard to the ethical and humanistic elements involved in medical training. This study sought to assess the impact of a ceremony in honor of the body donors has on ethical and humanistic attitudes in medical students. Medical students were surveyed about their perceptions of changes in themselves, respect for donors and donor families, and their relationship with patients. The effect of the students' contact with the family of the donor was analyzed in students who had contact with the cadaver in the dissection room and had either participated or not participated in the donor memorial ceremony. A total of 370 questionnaires were answered by first-, second-, and third-year medical students at the Federal University of Health Sciences of Porto Alegre in 2017. The students who participated in the ceremony presented more positive responses in relation to commitment to their studies, reflection on death, and positive development of empathy when compared to those who did not attend the ceremony. Most of the students that attended the ceremony suggested the event led to an improvement in the doctor–patient relationship. These results suggest that cadaver dissection with accompanied memorial ceremony involving contact with donor families is an effective means of fostering ethical and humanistic attitudes among medical students from the beginning of the course.     

Briging it all back home: some implications of recent science and technology studies for the classroom science teacher

In this paper, we support the validity of drawing from science studies to reshape science education. While true educational reform must involve alternative curricular structures, we stress that we do not propose here either a comprehensive curricular framework or a report on a pilot classroom project, as our research perspective comes from science studies rather than from education. Instead this paper is intended to encourage educators to draw from methodologies used in science studies to further their goals in education research and in classroom teaching. First, we examine theoretical connections and divergences between science studies and theories of education. Secondly, we discuss the benefits of teaching science as a social process and offer some suggestions that can be introduced by classroom teachers into pre-existing science curricula.     

Learning the principles of simulation using the birthday problem

Using the famous Birthday problem, we present here a practical activity that allows students to perceive the basic reasoning behind simulation and explore its potential. Through a playful approach with probabilities, students are led along a path that illustrates difficulties with intuition and introduces them to theoretical results for sample proportions.     

Low test scores in Latin America: poor schools,poor families or something else?

Latin American students consistently score low on international tests of cognitive skills. In the PISA 2012 results, students in seven Latin American countries had an average score of 395 in mathematics, or about 100 points lower than the average score of 497 in four Scandinavian countries. We estimate the effect of socioeconomic characteristics on student scores in Latin America and Scandinavia and find that 50 points of the difference are explained by Latin American parents’ lower average educational and socioeconomic characteristics, 25 points are explained by Latin America’s weak cultural orientation toward reading books and the remaining 25 points are explained by the lower effectiveness of Latin American educational systems in teaching cognitive skills.