The impact of different types of physical activity on total and regional bone mineral density in young Brazilian athletes

Bone turnover is affected by exercise throughout the lifespan, especially during childhood and adolescence. The objective of this study was to investigate the impact of different sports on total and regional bone mineral density in male Brazilian adolescent athletes. Forty-six adolescents aged 10-18 years participated in the study: 12 swimmers, 10 tennis players, 10 soccer players, and 14 sedentary individuals. The athletes had engaged in physical activities for more than 10 h per week in the previous 6 months. Bone mineral density of the lumbar spine (L1-L4), left proximal femur region, and whole body was evaluated by dual-energy X-ray absorptiometry. Results showed higher mean values in the proximal femur region of tennis and soccer players (1.02 ± 0.18; 0.96 ± 0.16, respectively) than swimmers and controls (0.91 ± 0.14 and 0.87 ± 0.06, respectively) (P < 0.05). In relation to the impact of sporting activities based on bone age determination, we observed significant differences in bone mineral density at all evaluated sites at the end of puberty (16-18 years) compared with 10-12 years, with increases of 78% in the lumbar spine, 47% in the proximal femur, and 38% in the whole body.     

The effect of patellar taping on EMG activity of vasti muscles during squatting in individuals with patellofemoral pain syndrome

Although patellar taping has been shown to reduce pain in participants with patellofemoral pain syndrome, the mechanisms of pain reduction have not completely been established following its application. The purpose of this study was to evaluate EMG activity of vastus medialis and vastus lateralis following the application of patellar taping during a functional single leg squat. Both vastus medialis obliquus-vastus lateralis onset and vastus medialis obliquus/vastus lateralis amplitude of 18 participants with patellofemoral pain syndrome and 18 healthy participants as controls were measured using an EMG unit. This procedure was performed on the affected knee of participants with patellofemoral pain syndrome, before, during, and after patellar taping during unilateral squatting. The same procedure was also performed on the unaffected knees of both groups. The mean values of vastus medialis obliquus-vastus lateralis onset prior to taping (2.54 ms, s = 4.35) were decreased significantly following an immediate application of tape (-3.22 ms, s = 3.45) and after a prolonged period of taping (-6.00 ms, s = 3.40 s) (P < 0.05). There was also a significant difference between the mean values of vastus medialis obliquus-vastus lateralis onset among controls (-2.03 ms, s = 6.04) and participants with patellofemoral pain syndrome prior to taping (P < 0.05). However, there were no significant difference between the ranked values of vastus medialis obliquus/vastus lateralis amplitude of the affected and unaffected knees of participants with patellofemoral pain syndrome and controls during different conditions of taping (P > 0.05). Decreased values of vastus medialis obliquus-vastus lateralis onset may contribute to patellar realignment and explain the mechanism of pain reduction following patellar taping in participants with patellofemoral pain syndrome.     

金融资本赋能科技创新建立良性循环机制思考与研究

从科技型中小企业的融资现状和融资需求出发,研究科技金融结合推动科技成果转化机制.聚焦新时期科技成果转化对金、产、研融合提出新要求,基于不同类型的金融资本促进金产研结合、推动科技成果转化进展与成效的研究,以及西方发达国家的有关经验,阐述金、产、研融合良性循环机制的形成原理及现行机制存在的问题,最后提出促进构建金产研良性循环机制的着力点与有关政策建议.     

The relationship between work conditions and perceptions of organizational justice among library employees

Library employees hold perceptions about the fairness of the outcomes, processes, and interpersonal treatment in their workplaces. When employees feel the workplace is fair they are more likely to feel commitment to the organization, perform in-role and extra-role tasks, and experience job satisfaction. When employees perceive injustice in the workplace, research points to negative outcomes such as withholding work or even sabotage. To understand the antecedents of organizational justice, researchers carried out a national survey of librarians to compare the predictive power of perceived organizational support, job autonomy, job feedback, and job stress. Results indicate that increasing librarians' perceptions of organizational support and their autonomy, and providing meaningful and timely job feedback can increase overall perceptions of justice. Managers can enhance a climate of justice in their workplaces by developing strategies that target organization support, autonomy, and feedback to reduce a sense of injustice between and among employees.     

Work Demands and Work Resources: Testing a Model of Factors Predicting Turnover Intentions in Early Childhood Education

Early Childhood Education Journal - We studied the working conditions in Early Childhood Education and Care (ECEC). The aim was to explore how ECEC staff experience work demands and resources and...     

Student learning performance in online collaborative learning

Education and Information Technologies - Online collaborative learning (OCL) has received significant attention, but the ultimate goal of adopting OCL is neglected, especially in higher education...     

Taking a Different Route: Contribution of Articulation and Metacognition to Intervention With At-Risk Third-Grade Readers

This study compared the impact of 2 types of small-group interventions targeting below-level 3rd-grade students. The study compared WordWork decoding and spelling instruction (Calfee, Miller, Norman, Wilson, &; Trainin, 2006 Calfee, R. C., Miller, R. G., Norman, K., Wilson, K., &; Trainin, G. (2006). Learning to do educational research. In M. A. Constas &; R. J. Sterenberg (Eds.), Translating theory and research into educational practice: Developments in content domains, large scale reform, and intellectual capacity (pp. 77–103). New York, NY: Routledge. [Google Scholar]; Calfee &; Patrick, 1995 Calfee, R. C., &; Patrick, C. L. (1995). Teach our children well: Bringing K–12 education into the 21st Century. Stanford, CA: Stanford Alumni Assoc. [Google Scholar]), which includes attention to articulation and metacognition, with a more traditional phonological awareness program (Torgesen &; Bryant, 1993 Torgesen, J. K., &; Bryant, B. R. (1993). Phonological awareness training for reading. Austin, TX: Pro-Ed. [Google Scholar]). University education students delivered the interventions with equal instructional time and fidelity, to both groups. Students in both intervention groups engaged in repeated readings of connected text to promote transfer. The impact of training was assessed through decoding, spelling, and oral reading fluency measures. Results indicated that WordWork produced more positive results in decoding, spelling, and fluency, and had significantly fewer treatment resisters.     

Development of a Short-Form Measure of Science and Technology Self-efficacy Using Rasch Analysis

Despite an increased focus on science, technology, engineering, and mathematics (STEM) in U.S. schools, today’s students often struggle to maintain adequate performance in these fields compared with students in other countries (Cheek in Thinking constructively about science, technology, and society education. State University of New York, Albany, 1992; Enyedy and Goldberg 2004; Mandinach and Lewis 2006). In addition, despite considerable pressure to promote the placement of students into STEM career fields, U.S. placement is relatively low (Sadler et al. in Sci Educ 96(3):411–427, 2012; Subotnik et al. in Identifying and developing talent in science, technology, engineering, and mathematics (STEM): an agenda for research, policy and practice. International handbook, part XII, pp 1313–1326, 2009). One explanation for the decline of STEM career placement in the U.S. rests with low student affect concerning STEM concepts and related content, especially in terms of self-efficacy. Researchers define self-efficacy as the internal belief that a student can succeed in learning, and that understanding student success lies in students’ externalized actions or behaviors (Bandura in Psychol Rev 84(2):191–215, 1977). Evidence suggests that high self-efficacy in STEM can result in student selection of STEM in later educational endeavors, culminating in STEM career selection (Zeldin et al. in J Res Sci Teach 45(9):1036–1058, 2007). However, other factors such as proficiency play a role as well. The lack of appropriate measures of self-efficacy can greatly affect STEM career selection due to inadequate targeting of this affective trait and loss of opportunity for early intervention by educators. Lack of early intervention decreases selection of STEM courses and careers (Valla and Williams in J Women Minor Sci Eng 18(1), 2012; Lent et al. in J Couns Psychol 38(4), 1991). Therefore, this study developed a short-form measure of self-efficacy to help identify students in need of intervention.     

The Flipped Classroom in Training and Development: Fad or the Future?

This article provides an overview of the characteristics of the flipped classroom, discusses the foundations of this innovative instructional model, and analyzes the possibility of adoption and application to corporate learning platforms. The article assesses whether the flipped classroom is simply a temporary trend in education and learning or has the potential to truly revolutionize instructional design and delivery in the realm of training and development.     

Future Sex Educator Perceptions of Rural Versus Urban Instruction: A Case for Community-Centered Sexual Health Education

Instructors of sexual health courses in rural areas face unique challenges as they are often forced to use school-based prevention curricula field-tested in urban areas. Research has yet to consider what future sex educators’ regional expectations are for their profession and how those expectations might have an impact on the classroom. Drawing from interviews with 26 sex-educators-in-training, we find that future educators tended to expect that rural communities would be less diverse, more conservative, and less informed about sexual health matters, even though research demonstrates that today's rural communities inconsistently align with those perceptions.