Quantifying the effects of load carriage and fatigue under load on sacral kinematics during countermovement vertical jump with IMU-based method

We present a method for quantifying sacral kinematics during countermovement jumping (CMJ) using an inertial measurement unit (IMU). The IMU-derived sacral kinematic trajectories reproduced motion capture acceleration, velocity, and displacement to within mean (standard deviation) differences of 0.024 (0.088) m/s², 0.023 (0.026) m/s, and 0.003 (0.032) m, respectively, across 252 jumps performed by 14 subjects. The method also quantified differences in maximum sacral displacement to within 1 % and differences in maximum propulsive velocity to within 0.7 % of motion capture estimates. This builds upon existing IMU-based methods for quantifying jump performance, which do not provide sacral kinematic trajectories. The utility of this method is demonstrated by its ability to discriminate jump performance metrics across a diverse subject population. In particular, we found that 21 participants adopted multiple strategies to maximize jump height in unloaded and loaded fresh conditions, but converged to a common strategy when jumping fatigued and under load. Changes in kinematic parameters were evident across conditions, and several changes were significantly associated with changes in jump performance (i.e., height). These parameters include changes in the depth of the countermovement, duration of the propulsive phase and maximum propulsive velocity. Collectively, these results point toward the future use of this method in naturalistic environments and for multiple objectives including biomechanical performance assessment and tracking, fatigue assessment, and jump training.     

Through the looking glass: Ethnic and generational patterns of immigrant identity

Traditional theories of the “looking glass self” and “social mirroring” assume that people's views of their own group reflect the societal view. Crocker and colleagues (Crocker, J., Luhtanen, R., Blaine, B., & Brodnax, S. (1994). Collective self-esteem and psychological well-being among white, black, and Asian college students. Personality and Social Psychology Bulletin, 20, 503–513), however, found ethnic group differences in the extent to which private and public views correspond. We report data from two studies that further examine this correspondence in (a) a sample of first- and second-generation Black immigrants and (b) samples of first- and second-generation Asian/Pacific Islander, Black, Latino, and White immigrants. Study 1 shows significant shifts for Black immigrants, from a high correlation between public and private regard in the first generation to a non-significant relationship in the second generation. Study 2 replicates the findings for the Black sample and shows different patterns of association for the other three groups. It also shows that endorsement of multiculturalism moderates the relationship between public and private regard among first generation Black and Latino immigrants. We discuss these results in terms of managing the negative value associated with one's group in society and consider immigration as a site for studying social change.     

MEDTUTOR: a microcomputer-based training program for MEDLINE

MEDTUTOR is an interactive, microcomputer-based training package designed to teach medical and health professionals, as well as librarians and information specialists, how to use MEDLINE effectively. The objective of MEDTUTOR is to provide a comprehensive package for teaching the various commands and search techniques required for utilizing the MEDLINE database through the MEDLARS system. MEDTUTOR's menu-driven design allows novice users to learn about the content and use of MEDLINE, such as author searching, text word searching, MeSH indexing, etc., at their own pace and with considerable program feedback. In addition, MEDTUTOR provides the skilled searcher with a way to reinforce or recall previously-learned search techniques without incurring online charges. MEDTUTOR may be used in place of formal training, as a precursor to or as a refresher following formal training, or for review of a particular concept. It provides inexpensive and easily accessible instruction for searching MEDLINE.     

Learning to Read and Learning to Teach Reading

The National Curriculum for Initial Teacher Education in English is specific and detailed about the knowledge expected of primary teachers. Shulman (1987) argued that teachers transform this sort of subject content knowledge into something accessible and meaningful to their pupils and this knowledge is described as ‘pedagogic content knowledge’. Medwell et al. (1998) found that effective literacy teachers only knew literacy in the way that they taught it. The research project underpinning this article aimed to explore student teachers' conceptions of the teaching of reading in order to find out what they thought they were teaching when they taught reading. It was thought that the personal reading histories of the students would impact on their developing conceptions of teaching reading. This article traces one student, Gordon, through the year of his PGCE course. In the form of dialogue between Gordon and the researcher developing understanding is articulated. Three different types of reading are described: decoding, making meaning and engaging. Reading is seen as a transformative process, where the reader is both within and outside the text. This has implications both for the conception of reading contained within the curriculum and the way it is implemented within the classroom. A teacher can only introduce children to experiences and ways of reading that are known to herself. It is argued, therefore, that student teachers need to extend the boundaries of their own reading and so appreciate the wide range of ways in which meaning is constructed and readers are created.     

Constructing student portfolios: A process and product that fosters communication with families

When parents pick their children up from day care or preschool, one of the first questions that is typically asked of their child is “What did you do in school today?” At an open house parents usually ask teachers, “How is my child doing in your class?” “Is my child learning new things?” “Has my child improved any since the beginning of the school year, and in what ways?” Or think of the child who turns in a product and asks, “What do you think of this, Teacher?” or “Did you like my work today?”     

Great Business Training is Just Enough,Just in Time,and Just for Me

Retrenchment practices in the 1980s represented a new challenge to institutions of higher education. The literature encompassing higher education within the past 10 years has revealed limited information concerning retrenchment policies in public community colleges in Texas. This study investigated the presence or absence of retrenchment policies and their relation to fluctuations in enrollment and state funding. All 49 public community‐junior college districts in the state of Texas were included in the study. Twenty (41%) of these community colleges had a retrenchment policy. This study indicated that administrative decisions regarding the development and adoption of retrenchment policies are based on state revenue declines as opposed to enrollment fluctuations.