光学中影像速度问题归类分析

1 启发的渊源孔子曰:“不愤不启,不悱不发。举一隅不以三隅反,则不复也。”他要求学生“触类旁通”“闻一知十”,强调“学一思一行”的过程,从学与思、学与习、学与行的关系角度阐述了学习的规律。他的思想被后代儒学所继承,如宋代的朱熹认     

Effects of Implementing Multiple Components in a School-Wide Antibullying Program: A Randomized Controlled Trial in Elementary Schools

This study investigates the effectiveness of the PRIMA antibullying program for elementary education using a cluster-randomized trial with two experimental conditions (with and without student lessons) and a control group. Students of 31 schools participated in the study (N = 3,135; M_age = 10 years). Multilevel regression analyses demonstrated positive effects of the program on peer-reported victimization and reinforcing behavior. Implementing multiple program components was related to stronger program effects. The results provide partial experimental evidence for the beneficial effects of combining student lessons and teacher training in antibullying programs. Future experimental research is needed to investigate other approaches that reduce not only peer-reported victimization, but also self-perceived bullying and victimization.     

Learning in the workplace for garage mechanics and technicians

Employees in technical firms, like garages, need more and more formations. Due to the very fast innovation in technology, lifelong learning is a real need for these labour forces. On the other hand, there are the needed formations very specialized and expensive. Another problem employers faced in these economical sectors in Western Europe is the lack of candidates. Also in secondary education schools, the wide interest for these formations is decreasing. One of the factors causes this problem is that schools don＇t have enough money for investing in new and high-tech machines. Therefore two interreg projects were submitted and approved for financing. Interreg is an initiative of the European Union meant for the permanent development of the ＂European Space＂. The third phase of interreg means enhancing the economic and social cohesion within the European Union. In this paper, we describe two successful projects, namely Autoweb and V@K, which try to help employers, employees, schools and students to keep up with the high-tech innovations with a workplace-based e-learning program.     

Hybrid e-TextBooks as comprehensive interactive learning environments

An e-TextBook can serve as an interactive learning environment (ILE), facilitating more effective teaching and learning processes. In this paper, we propose the novel concept of an EPUB 3-based Hybrid e-TextBook, which allows for interaction between the digital and the physical world. In that regard, we first investigated the gap between the expectations of teachers with respect to e-TextBook functionalities, on the one hand, and the ILE functionalities offered by e-TextBooks, on the other hand. Next, together with teachers, we co-designed and developed prototype EPUB 3-based Hybrid e-TextBooks that make it possible to connect their learning content to smart devices in classrooms, leveraging both digital publishing and Semantic Web tools. Based on experimentation with our prototype Hybrid e-TextBooks, we can argue that a semantically enriched EPUB 3-based Hybrid e-TextBook is able to act as a comprehensive ILE, providing the tools needed by teachers in smart classrooms. Furthermore, expert observations and Smiley o’meter results demonstrate an effective impact on student cognition and motivation.     

Associations between physical activity and health-related fitness – volume versus pattern

Approximately 3.2 million people die of non-communicable diseases (NCD) each year due to insufficient physical activity. Physical activity guidelines are possibly perceived as too demanding and might thus pose a barrier. We addressed the question if a more stable physical activity pattern is associated with higher levels of health-related fitness than one with high and low intensities, regardless of the physical activity level (PAL). Physical activity was objectively measured in 296 men and women (53.7 ± 8.94 years) with the SenseWear Pro Armband^®. Using this data, the PAL and a Gini index were calculated to report the physical activity pattern. Health-related fitness was expressed as a fitness index. PAL was weakly correlated to health-related fitness (r = 0.38, P < .0001). The Gini index was also weakly correlated to the fitness index (r = 0.23, P < .0001). Results of the ANCOVA showed that participants in the first quartile of PAL always scored significantly lower for health-related fitness than participants in quartile four, after adjustment for the Gini index. These results suggest that as long as the volume of physical activity is high, health-related fitness will be high as well, independent of the physical activity pattern or variability in intensities throughout the day.     

Conservation in Transition

ABSTRACT:

An evaluation of four different dissemination modes distributing activities developed through a teaching materials development program was performed. The activities, developed for use in middle schools, focused on Great Lakes topics in science, history, and social studies. It was found that short intensive workshops were more effective than longer workshops both in participant use of materials and in transmission of the materials to other potential users. The difference in usage seems to be related to differences in the professional orientation of teachers attracted into the two different types of workshops. Simply giving activities to prospective users resulted in no usage. Those individuals who took the trouble to mail order the materials used them but at a somewhat lower frequency than those who participated in a workshop. It is concluded that short intensive workshops are the most cost-effective way of ensuring usage of the type of curriculum materials disseminated in this program.     

Evaluation and management of leukolysis-mediated pseudohyperkalemia in paediatric leukemic samples

IntroductionLeukolysis-related pseudohyperkalemia due to preanalytical procedures may lead to erroneous (or absence of) treatment based on an invalid lab test result. We aimed to obtain a leukocyte threshold above which leukolysis-related pseudohyperkalemia becomes clinical relevant. Secondly, temporal dynamics of treatment-induced leukocyte decrease were studied to allow tailored implementation of laboratory information system (LIS) decision rules based on the leukocyte threshold to avoid leukolysis-related pseudohyperkalemia.Materials and methodsPotassium results of AU5811 routine chemistry (Beckman Coulter, Brea, California, USA) and iStat point of care (POC) (Abbott Diagnostics, Chicago, Illinois, USA) analysers were compared, the latter method being insensitive to leukolysis caused by pre-analytical procedures. Potassium results were combined with leukocyte counts obtained using a Cell-Dyn Sapphire haematology analyser (Abbott Diagnostics, Santa Clara, California, USA), resulting in 132 unique data triplets. Regression analysis was performed to establish a leukocyte threshold. The Reference Change Value (√2 x Z x √(CV_a² + CV_i²)) was used to calculate maximum allowable difference between routine analyser and POC potassium results (delta_max + 0.58 mmol/L). Temporal analysis on the treatment-induced leukocyte decrease was performed by plotting leukocyte counts in time for all patients above the threshold leukocyte count (N = 41).ResultsEstablished leukocyte threshold was 63 x10⁹/L. Temporal analysis showed leukocyte counts below the threshold within 8 days of treatment for all patients.ConclusionsBased on performed analyses we were able to implement LIS decision rules to reduce pseudohyperkalemia due to preanalytical procedures. This implementation can contribute to a reduction in erroneous (or absence of) treatments in the clinic.     

Child Care Quality in The Netherlands Over the Years: A Closer Look

Research Findings: We assessed the quality of child care in a nationally representative sample of 200 Dutch child care centers using the Infant/Toddler Environment Rating Scale–Revised and/or Early Childhood Environment Rating Scale–Revised and compared it with a previous assessment in 2005. The Caregiver Interaction Profile (CIP) scales were used to rate the quality of caregiver–child interactions. Results showed a significant and substantial decline in quality compared to 2005, with 49% of the groups now scoring below the minimal level. The CIP scales showed relatively high scores for the basic caregiver interactive skills of sensitive responsiveness, respect for autonomy, and structuring and limit setting but much lower scores for the more educational skills of verbal communication, developmental stimulation, and fostering positive peer interactions. Caregiver sensitive responsiveness was significantly lower in infant groups (0–2 years) than in preschool groups (2–4 years); caregiver respect for autonomy, verbal communication, developmental stimulation, and fostering positive peer interactions were significantly lower in infant groups than in preschool groups and mixed-age groups (0–4 years). Practice or Policy: Quality of child care is not stable across the years, and regular quality assessments are therefore needed to monitor child care quality. The low scores on the more educational versus the more basic caregiver interactive skills indicate that these skills deserve more attention in caregiver education and training. Training programs should be attuned to the individual interaction skill profile of caregivers.     

A measurement of student teachers’ parent–teacher communication competences: the design of a video-based instrument

Abstract

This study reports on the design of a video-based instrument to assess student teachers’ parent–teacher communication competences (PTCC) in a reliable and valid way. PTCC refer to the competences needed to communicate successfully with parents during conversations such as parent–teacher conferences. Taking into account both conceptual and methodological challenges regarding the measurement of competences, several methodological steps were followed to design a video-based instrument focusing on the assessment of student teachers’ perception, interpretation and decision-making skills (PID skills) regarding parent–teacher communication: designing video vignettes presenting realistic job situations regarding parent–teacher communication; developing instructions to elicit student teachers’ PID skills; designing a coding scheme to analyse student teachers’ responses; and implementing the instrument (n = 269) to test and refine it. This ultimately resulted in an instrument consisting of (1) three video vignettes, (2) a series of open-ended questions eliciting student teachers’ PID skills, and (3) three coding schemes to develop a perception score, an interpretation score and a decision-making score for PTCC. The (4) implementation of the instrument confirmed that this innovative video-based tool might be a promising approach to assess student teachers’ PTCC. To conclude, the quality and contribution of the measurement instrument and the implications for further research are discussed.