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Patrick Costello 《Computer Science Education》2013,23(4):317-329
While recursion is a useful programming technique, there are times when it can be very expensive in terms of execution. This idea was demonstrated in a classroom exercise involving an analysis of a particular recursive algorithm for computing binomial coefficients. 相似文献
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E Lynne Geddes Ellen Costello K Raivel R Wilson 《Cardiopulmonary Physical Therapy Journal》2009,20(1):5-12
Purpose: To investigate the effects of a 12-week home walking program on cardiovascular parameters, fatigue perception, and walking distance in persons with multiple sclerosis (MS). Methods: Twelve ambulatory persons with MS, not currently participating in exercise were randomly assigned to control (C) or experimental groups (EX). Pretest data collection included resting HR, BP, fatigue perception (Fatigue Severity Scale), and 6-minute walk test. EX received a home walking program (30 min, 3 × week, × 12 weeks), using a modification of Karvonen''s formula to calculate HR range. A HR monitor was used to adjust walking speed. The C group refrained from any regular exercise. Posttest data were collected at week 12 and analyzed using the Mann-Whitney U Test. Results: No statistically significant differences were noted between groups in any measured parameters; however, walking distance and Physiologic Cost Index did improve in the exercise group. Conclusion: No adverse events or increase in fatigue levels related to the exercise intervention were reported in this study. This home walking program may not be of sufficient intensity to elicit significant cardiovascular changes. Abnormal cardiac responses have been documented in this population, which may have affected the results. Clinicians may need to use alternate measures to assess fitness in this population.Key Words: multiple sclerosis, home walking program, cardiovascular, aerobic 相似文献
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The purpose of this study was to determine the effects of cryotherapy, in the form of cold water immersion, on knee joint position sense. Fourteen healthy volunteers, with no previous knee injury or pre-existing clinical condition, participated in this randomized cross-over trial. The intervention consisted of a 30-min immersion, to the level of the umbilicus, in either cold (14 ± 1 °C) or tepid water (28 ± 1 °C). Approximately one week later, in a randomized fashion, the volunteers completed the remaining immersion. Active ipsilateral limb repositioning sense of the right knee was measured, using weight-bearing and non-weight-bearing assessments, employing video-recorded 3D motion analysis. These assessments were conducted immediately before and after a cold and tepid water immersion. No significant differences were found between treatments for the absolute (P = 0.29), relative (P = 0.21) or variable error (P = 0.86). The average effect size of the outcome measures was modest (range -0.49 to 0.9) and all the associated 95% confidence intervals for these effect sizes crossed zero. These results indicate that there is no evidence of an enhanced risk of injury, following a return to sporting activity, after cold water immersion. 相似文献
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Emily L. Loeb Jessica Kansky Joseph S. Tan Meghan A. Costello Joseph P. Allen 《Child development》2021,92(2):e158-e172
This study examined perceived parental psychological control in early adolescence as a critical stressor likely to be associated with lower levels of adaptation into mid-adulthood. A diverse sample of 184 adolescents was followed from age 13 through 32 to assess predictions to adult adaptation. Perceived parental psychological control at age 13 predicted relative decreases in observed support, lower likelihood of being in a romantic relationship, and lower academic attainment (after accounting for grade point average at baseline) by age 32. Many outcomes were mediated by lower levels of psychosocial maturity and peer acceptance in mid-adolescence. Overall, results suggest that perceived parental psychological control in early adolescence potentially undermines autonomy so as to lead to less favorable outcomes well into adulthood. 相似文献
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Kelly Wissman Sean Costello Diane Hamilton 《Changing English: An International Journal of English Teaching》2012,19(3):325-338
This article explores the experiences and literacy practices of an adolescent boy enrolled in an academic support class, in which students received an open-ended invitation to respond to S.E. Hinton's novel The Outsiders with the software programme Comic Life. In constructing this ‘telling case', we highlight how traditional print literacies associated with English instruction can construct school as a ‘contradictory symbolic space' for many students, but also how the introduction of the multimodalities can provide opportunities for adolescents to experience in-school literacies as social, performative and creative. We argue for re-envisioning literacy curricula and assessment not only to incorporate multimodalities, but also to provide students with instruction in writing conventions and practice with print in ways that serve larger purposes beyond remediation and test preparation. We posit the possibility for ‘complementary symbolic spaces' that are connected to the landscape of adolescent literacies that students traverse outside school and to students' desires to communicate, create and reach others within a range of discourse communities. 相似文献
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The NIMH Diagnostic Interview Schedule for Children, a highly structured interview covering a broad range of clinically relevant symptoms and behaviors, was administered to 242 disturbed children and their parents. Parent and child were interviewed separately and were assessed twice at a median interval of 9 days. Intraclass correlations between symptom scores derived from the interviews indicated that parents were generally more reliable than children in reporting child symptoms. However, test-retest reliabilities showed an opposite age pattern for parent and child. The reliability of the child's report increased with age and was lower for children aged 6-9 than those aged 10-13 and 14-18. Conversely, the reliability of the parent's report decreased with the age of the child and was slightly higher for children aged 6-9 than those aged 10-13 and 14-18. These findings were interpreted in terms of children's cognitive development and age-related shifts in parents' perceptions and awareness of their children's behavior. 相似文献
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Bethany Koestner Costello 《Journal of Business & Finance Librarianship》2013,18(4):319-332
A sample of 325 students, faculty, and staff at a graduate business school completed an online survey designed to assess their knowledge and utilization of the library's e-book collection as well as their desired method of accessing various types of books. Participants were asked about their format preference for reading four different types of books: course textbooks, computer software guides, career development books, and popular business titles. The final section of the survey gave respondents an opportunity to provide free form comments and thoughts about e-books. The implications of this research for collection development are discussed. 相似文献
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Thomas Sawczuk Ben Jones Sean Scantlebury Jonathan Weakley Dale Read Nessan Costello 《Measurement in physical education and exercise science》2018,22(1):11-18
This study aimed to evaluate the between-day reliability and usefulness of a fitness testing battery in a group of youth sport athletes. Fifty-nine youth sport athletes (age = 17.3 ± 0.7 years) undertook a fitness testing battery including the isometric mid-thigh pull, counter-movement jump, 5–40 m sprint splits, and the 5–0-5 change of direction test on two occasions separated by 7 days. Usefulness was assessed by comparing the reliability (typical error) to the smallest worthwhile change. The typical error was 5.5% for isometric mid-thigh pull and 3.8% for counter-movement jump. The typical error values were 2.7, 2.5, 2.2, 2.2, and 1.8% for the 5, 10, 20, 30, and 40 m sprint splits, and 4.1% (left) and 5.4% (right) for the 5–0-5 tests. The smallest worthwhile change ranged from 1.1 to 6.1%. All tests were identified as having “good” or “acceptable” reliability. The isometric mid-thigh pull and counter-movement jump had “good” usefulness, all other tests had “marginal” usefulness. 相似文献