Is possible an eccentric overload in a rotary inertia device? Comparison of force profile in a cylinder-shaped and a cone-shaped axis devices

ABSTRACT

The aims of this study were to compare the force profile of using a horizontal cylinder-shaped axis or a vertical cone-shaped axis to provide resistance in rotary inertia devices, and to report the evolution of kinetic and kinematic variables in experienced athletes during a half-squat exercise. Twenty-two healthy active men participated in the assessment of time, peak velocity, peak force, time to reach the peak force, average force, impulse, and range of movement, during a half-squat incremental test performed on conical inertial device (CP) and on cylinder inertial device (YY). The analysis showed that YY during CON-ECC phased generates substantial higher peak_force, mean_force, impulse, time, and a lower peak_velocity, than CP. We never obtained eccentric overload for peak_force or mean_force. CP offers less resistance to accelerate-decelerate the movement with respect to YY, we need checking whether eccentric overload it is being produced, and the impulse was the only kinetic variable that was able to discriminate between the inertias and devices.     

The “I” and the “ME” of criminology and criminal justice students: Symbolic interaction in an educational setting

This study examines the self-concept of criminology and criminal justice students, vis-`a-vis the perceptions held of them by non-criminology and criminal justice students, using a framework of symbolic interactionism. The data in this study were obtained from a sample of both criminology and criminal justice students and non-criminology and criminal justice students attending a large state university in north Texas. The findings reveal a lack of consensus among perception patterns held by criminology and criminal justice students and non-criminology and criminal justice students. Implications regarding the future of criminology and criminal justice education follow.     

Rebuilding New Orleans: A Community Field Learning Experience

This article examines how to set up educational seminars for social work students that expose students, first-hand, to a natural or man-made disaster's physical and human impact on a community. These short, intensive experiential seminars help students appreciate the social work role in addressing extreme cases of trauma and loss that have immediate application to their professional work and studies at home. The study also presents evidence via personal reflections of students and faculty about the value-added benefits of the seminar learning experience in terms of the students' integration of course material, readings, and field placement experiences, and their personal and professional growth and maturation as beginning social workers.     

Learning by doing? Prospective elementary teachers' developing understandings of scientific inquiry and science teaching and learning

This study examined prospective elementary teachers' learning about scientific inquiry in the context of an innovative life science course. Research questions included: (1) What do prospective elementary teachers learn about scientific inquiry within the context of the course? and (2) In what ways do their experiences engaging in science investigations and teaching inquiry‐oriented science influence prospective elementary teachers' understanding of science and science learning and teaching? Eleven prospective elementary teachers participated in this qualitative, multi‐participant case study. Constant comparative analysis strategies attempted to build abstractions and explanations across participants around the constructs of the study. Findings suggest that engaging in scientific inquiry supported the development more appropriate understandings of science and scientific inquiry, and that prospective teachers became more accepting of approaches to teaching science that encourage children's questions about science phenomena. Implications include careful consideration of learning experiences crafted for prospective elementary teachers to support the development of robust subject matter knowledge.     

Examining Teachers' Hurdles to ‘Science for All’

The goal of this research is to identify science teachers' beliefs and conceptions that play an important role in shaping their understandings of and attempts to enact inclusive science teaching practices. We examined the work products, both informal (online discussions, email exchanges) and formal (papers, unit plans, peer reviews), of 14 teachers enrolled in a master's degree course focused on diversity in science teaching and learning. These emerging understandings were member-checked via a series of interviews with a subset of these teachers. Our analysis was conducted in two stages: (1) describing the difficulties the teachers identified for themselves in their attempts to teach science to a wide range of students in their classes and (2) analyzing these self-identified barriers for underlying beliefs and conceptions that serve to prohibit or allow for the teachers' understanding and enactment of equitable science instruction. The teachers' self-identified barriers were grouped into three categories: students, broader social infrastructure, and self. The more fundamental barriers identified included teacher beliefs about the ethnocentrism of the mainstream, essentialism/individualism, and beliefs about the meritocracy of schooling. The implications of these hurdles for science teacher education are discussed.     

Nietzsche,Tragedy, and Liberal Moral Psychology

Abstract

This essay discusses Nietzsche's tragic moral psychology and its significance for liberal political philosophy. In the essay, I sketch out what I view to be the basic features of Nietzsche's tragic psychology, which is strongly opposed to the Socratic and Stoic traditions, and I show how this perspective can be distinguished from the moral psychology that informs liberalism's position on issues such as personhood and political history. I conclude with a few suggestions for viewing Nietzsche's thought as a necessary corrective to a certain dogmatism that still inhabits liberal theory, in this way enabling liberal thought to conceptualise human nature and the human good in more creative and complex ways.     

The impact of test language on PISA scores. New evidence from Wales

In this paper we investigate the link between the language in which pupils take the Programme for International Student Assessment (PISA) test and the scores they achieve in this assessment, focusing upon the case of Wales. Using five rounds of PISA data and an instrumental variable approach, we show how pupils who took the test in Welsh score around 0.3 standard deviations (30 PISA test points) lower in reading, mathematics and science than their peers who took the test in English. This finding is robust to different model specifications and statistical approaches. We argue that this may indicate that the academic performance of teenagers in Wales may be underestimated in PISA – particularly amongst those who take this test in Welsh.