OBESITY AND REPORTS OF NO LEISURE TIME ACTIVITY AMONG OLDER AMERICANS: RESULTS FROM THE THIRD NATIONAL HEALTH AND NUTRITION EXAMINATION SURVEY

Physical inactivity is a cardiovascular risk factor that has a higher prevalence among overweight adults. The purpose of this study was to assess the prevalence of not participating in Leisure Time Physical Activity (LPTA) and the relationship to body weight class among older U.S. adults. A nationally representative cross-sectional survey with an in-person interview and medical examination was used. Between 1988 and 1994, 6569 adults 60 years of age or older responded to the household adult and family questionnaires as part of the National Health and Nutrition Examination Survey III. Mexican Americans and non-Hispanic blacks were oversampled to produce reliable estimates for these groups. Overall, 39% of older U.S. adults fall in the overweight range and 23.3% are obese. Obese older adults were more likely than their overweight and healthy weight counterparts to report participating in no LTPA The prevalence of adults reporting no leisure time physical activity (LPTA) is lowest among non-Hispanic whites compared to non-Hispanic blacks and Mexican-Americans in each body mass index category. Future interventions should address strategies to promote an increase in leisure time physical activity among older adults, especially among underserved populations, and help them to prevent weight gain.     

Program and institutional predictors of environmental justice inclusion in U.S. post-secondary environmental and sustainability curricula

Environmental justice (EJ) issues and perspectives, which emphasize the disproportionate environmental hazards experienced by low-income communities and communities of color, are often excluded from higher education sustainability discourses and curriculum. Utilizing a national sample of 297 interdisciplinary environmental and sustainability (IES) degree programs, this study identifies program-level values and student racial/ethnic demographics, as well as institutional structural characteristics influencing the inclusion of EJ content in IES curriculum. The findings have important implications for IES curriculum and program development, and racial/ethnic and class dynamics in this emerging field.     

Beyond decoding deficit: inhibitory effect of positional syllable frequency in dyslexic Spanish children

This study explores whether activation and inhibition word processes contribute to the characteristic speed deficits found in transparent orthographies (Wimmer, Appl Psycholinguist 14:1–33, 1993). A second and fourth grade sample of normal school readers and dyslexic school readers participated in a lexical decision task. Words were manipulated according to two factors: word frequency (high vs. low) and syllable frequency (high vs. low). It has been repeatedly found that words with high-frequency syllables require extra time for deactivating the lexical syllabic neighbors: the so-called inhibitory effect of positional frequency syllable (Carreiras et al., J Mem Lang 32:766–780, 1993). We hypothesized that dyslexic readers would show a stronger inhibitory effect than normal readers because they are slower decoders and they may also be slower at the activation and inhibition of word representations that are competing (i.e., syllabic candidates). Results indicated an interaction between word and syllable frequency (i.e., a strong inhibitory effect was found in the low-frequency word condition). According to our hypothesis, the inhibitory effect size was almost three times bigger in dyslexics than in the normal readers. This difference shows an alteration, not a developmental lag. Interestingly, the inhibitory effect size did not interact with school grade. Thus, reading experience did not impact the lexical processes involved on the inhibitory effect. Our outcomes showed how activation and/or inhibition of lexical processes can contribute to the lack of speed beyond decoding deficit.     

The influence of content organization on student's cognitive structure in thermodynamics

Two different approaches to the content of thermodynamics were used in an introductory college physics course: one was the traditional organization found in most textbooks on the subject, the other was based on the learning theory of David Ausubel. The influence of these different content organizations on the student's cognitive structure was investigated using a word association test which was analysed through hierarchical clustering analysis. Research findings suggest that the approach based on Ausubel's theory influences the student's cognitive structure in such a way that their conceptual hierarchies are more coherent with the basic laws and the conceptual structure of the subject matter.     

Key Authors in Business and Management Education Research: Productivity,Topics, and Future Directions

Previous studies of author productivity in business and management education (BME) research have focused on single disciplinary areas, and even single journals. This study is the first to examine the productivity of BME scholars across multiple disciplinary areas (i.e., accounting, economics, finance, information systems, management, marketing, and operations/supply chain management). We analyzed a pool of 17 BME journals with the highest hg‐index, by including the top three journals in the accounting and information systems areas, the top two journals in each of the other disciplinary areas, and an interdisciplinary BME journal. This examination covered a 10‐year period (2005‐2014), 4,464 articles and 9,617 article co‐authors. We identified 7,209 unique authors in this pool and ranked their productivity to create a “Key Authors” list. Each of the top 99 authors had five or more articles in our database. Our findings indicate the potential for cross‐disciplinary dissemination of research ideas and opportunities for scholars to enhance their research profile, because even a small increase in productivity can lead to substantial movement in the BME rankings of authors.     

Pedagogical work,stress regulation and work-related well-being among early childhood professionals in integrated special day-care groups

The aim of this study was to investigate the relationship between early childhood professionals’ (ECPs) stress regulation (using salivary cortisol and alpha-amylase [AA] measurements), work engagement and the quality of their pedagogical work in integrated special day-care groups. Participants were 89 ECPs from 21 integrated special day-care groups located in Helsinki, Finland. The special educational needs of children (who were between 3 and 6 years of age) in these groups varied from language disorders and self-regulation difficulties to severe disabilities. Data was collected by using work engagement surveys, salivary cortisol and AA measurements and observational assessments of pedagogical work. This study is novel, in that it combines approaches from different disciplines to investigate work-related well-being among ECPs. Our findings demonstrate the close relationship between ECPs’ stress regulation and the quality of pedagogical work in teams. Whilst ECPs’ high work engagement was associated with better-quality pedagogical work, we did not find any associations between different biomarkers and work engagement. Our study highlights the importance of teamwork, not only as fundamental to high-quality early childhood special education, but also in supporting the well-being of ECE professionals. The findings can be applied in future studies and can be used to inform intervention aiming to enhance working conditions in day-care centres.     

Modulation of general and specific cognitive precursors to early mathematical competencies in preschool children

European Journal of Psychology of Education - The main goal of this study was to analyze the contribution of predictors of both domain-general (working memory, processing speed, and receptive...     

Stability of nonlinear teleoperators using PD controllers without velocity measurements

This paper presents two Proportional-Derivative (PD) like controllers for nonlinear bilateral teleoperation systems. Compared to previous controllers of this kind, these schemes do not make use of velocity measurements. Under the assumptions that the human operator and the environment define passive maps from velocity to force, both controllers can ensure boundedness of velocities and position error. Moreover, in the case that the human and environment forces are zero, the controllers ensure velocity and position synchronization. Furthermore, the paper also presents a generalization to the case of teleoperation of networks of multiple robots. Simulations and real experiments, comparing the performance on free motion and interacting with a stiff wall, support the performance of the reported schemes. The experiments have been performed using two 3-degree-of-freedom nonlinear manipulators.     

形成性评价（Formative Assessment）的本质及其对教与学的影响

长期以来,很多学者一直倡导指导教学的评价,即通过评估学生需求和监测其学习进展,适当地设计学习顺序,调整教学策略,改良学习计划,以便有效地促进学习目标的完成。本研究调查了形成性评价在美国中学科学课中的实施情况,并分析其对学生学习进步的影响。研究表明,教师都在努力使用形成性评价来指导教学,而学生取得的成绩各不相同。