PLANNING FOR PRODUCTIVE COLLEGE-LEVEL WORK: USING THE COURSE ASSIGNMENT FRAMEWORK

This article recognizes the critical role community college instructors serve in preparing today's students for successful postsecondary education. Well-designed course assignments are a critical component of effective teaching and learning processes. The author summarizes some common assignment pitfalls (based on student input) and makes recommendations for avoiding them in community college classrooms. Then the author presents the Course Assignment Framework, which was designed to facilitate the planning of productive course assignments. The Course Assignment Framework delineates ten assignment categories, their rationales, and advantages for professors and students. The framework also promotes their combining of tasks so that instructors can customize and minimize the assignments that they expect of contemporary students. The article includes an example of an assignment planned using the framework and encourages instructors to refine course tasks to improve teaching, learning, and assessment.     

Activity profile and physiological demands of top-class soccer assistant refereeing in relation to training status

To determine the movement patterns and physiological demands of top-class soccer assistant referees, we performed computerized time-motion analysis and measured heart rate and blood lactate concentration in 15 assistant referees during 22 competitive matches in the top Danish league. To relate match performance to the physical capability of the assistant referees, they performed a 3 2 30 m sprint protocol before and after matches and a laboratory treadmill test within 3 weeks of the games. The mean total distance covered by the top-class assistant referees was 7.28 (range 5.78-8.16) km, of which 1.15 (0.86-1.44) km was high-intensity running and 1.16 (0.12-2.34) km was sideways running. The amount of high-intensity running during a game was correlated with performance of repeated sprints (r = 0.80, P ? 0.05). Mean heart rate was 137 (117-159) beats · min^-1 , corresponding to 73% (60-88%) of maximal heart rate and 65% (53-80%) of maximal oxygen uptake. Blood lactate concentration was 4.7 (1.6-11.0) and 4.8 (1.1-13.7) mmol · l -1 after the first and second half, respectively. Sprinting performance was poorer (P ? 0.05) after than before the games. The peak distance to the offside line was greater (P ? 0.05) in the second than the first half (7 - 1 vs 5 - 0 m). Our results show that: (1) top-class assistant soccer refereeing is characterized by brief intense bouts of forward and sideways running interspersed with long periods of low activity; (2) top-class soccer assistant referees have moderate aerobic energy production during games with episodes of high aerobic and anaerobic energy turnover; (3) assistant referees' performance of repeated sprints correlates with the amount of high-intensity running performed in a game; and (4) sprint performance decreases towards the end of a game, which appears to affect assistant referees' ability to keep up with play.     

Job tasks and the participation of low-skilled employees in employer-provided continuing training in Germany

This study analyses the participation of low-skilled employees in employer-provided training and examines the mechanisms that encourage the training participation of low-skilled employees. Building on theoretical considerations of human capital theory and the task-based approach, we seek to show that job tasks play an important role in explaining different participation levels of low-skilled employees in employer-provided continuing training. The empirical analyses are based on data from the new survey on establishments in Germany. To test the influence of job tasks on participation of low-skilled employees in employer-provided training, we run multivariate regression models that control for other explanatory variables. The results of our analysis confirm that job tasks are relevant to changes in the participation rates of low-skilled employees, which leads to the conclusion that differences between job tasks affect employers’ willingness to invest in training for their low-skilled staff.     

Do Technological and Course‐Related Variables Impact Undergraduates’ Perceived Favorability and Willingness to Recommend Online/Hybrid Business Courses?

Lower teaching evaluations can affect students’ willingness to recommend an online course. To maintain online course quality, it is important to keep the “integrity” of a course, that is, offer to the extent possible, the same content and learning outcomes in an online course as the face‐to‐face (F2F) equivalent. This study explored the impact of background, technological, and course‐related variables on perceived favorability of online (versus F2F) courses and willingness to recommend courses using two independent “mixed course format” samples of business undergraduates, that is, simultaneously taking online/hybrid and F2F courses. Participants were recruited based on their enrollment in at least one online or hybrid course. A complete data sample of 259 students filled out an online survey in the Fall 2015 semester, followed by a second independent sample of 269 students in the Spring 2016 semester. Hierarchical regression results showed that after controlling for background variables, one course‐related variable (instructor effectiveness) and one technological‐related (perceived ease of use) consistently explained perceived favorability of online (versus F2F) courses across both samples. For the willingness to recommend courses, after controlling for background variables, both course‐related variables (instructor effectiveness and student motivation) and the perceived favorability of the online course were each significant across both samples.     

Phytochrome and chloroplast development

The regular development of plants depends upon their correct interpretation of photosignals from the environment. The most important sensor pigment involved in this process is the chromoprotein phytochrome. This article reviews the role of phytochrome with particular reference to experiments carried out with seedlings of the mustard plant (Sinapis alba L.).     

Static and dynamic single leg postural control performance during dual-task paradigms

Combining dynamic postural control assessments and cognitive tasks may give clinicians a more accurate indication of postural control under sport-like conditions compared to single-task assessments. We examined postural control, cognitive and squatting performance of healthy individuals during static and dynamic postural control assessments in single- and dual-task paradigms. Thirty participants (female = 22, male = 8; age = 20.8 ± 1.6 years, height = 157.9 ± 13.0 cm, mass = 67.8 ± 20.6 kg) completed single-leg stance and single-leg squat assessments on a force plate individually (single-task) and concurrently (dual-task) with two cognitive assessments, a modified Stroop test and the Brooks Spatial Memory Test. Outcomes included centre of pressure speed, 95% confidence ellipse, squat depth and speed and cognitive test measures (percentage of correct answers and reaction time). Postural control performance varied between postural control assessments and testing paradigms. Participants did not squat as deep and squatted slower (P < 0.001) during dual-task paradigms (≤12.69 ± 3.4 cm squat depth, ≤16.20 ± 4.6 cm · s^?1 squat speed) compared to single-task paradigms (14.57 ± 3.6 cm squat depth, 19.65 ± 5.5 cm · s^?1 squat speed). The percentage of correct answers did not change across testing conditions, but Stroop reaction time (725.81 ± 59.2 ms; F_2,58 = 7.725, P = 0.001) was slowest during single-leg squats compared to baseline (691.64 ± 80.1 ms; P = 0.038) and single-task paradigms (681.33 ± 51.5 ms; P < 0.001). Dynamic dual-task assessments may be more challenging to the postural control system and may better represent postural control performance during dynamic activities.