Animation software for an introductory Dynamics course has been developed, which may be an integral feature of the web-based learning system, WileyPLUS (John Wiley and Sons, Inc. New York). This interactive software is unique because each animation may be directly linked to a homework problem and absolutely no programming is required of the user. The animations are hard-coded in Adobe Flash Action Script, so no external computer programs are needed. A study of 58 students was conducted in two sections of Dynamics during the spring term of 2008, where the software was used for both in-class demonstrations and homework assignments. Students used the program to help them answer eight qualitative questions regarding specific particle kinematics and kinetics concepts. A high percentage of students answered these questions correctly (with the assistance of the software). An anonymous survey was conducted at the end of the term regarding the effectiveness of the software. It was found that the students' qualitative understanding of particle kinematics and kinetics was significantly improved by using the program. The students consider the software easy to use and recommend it to instructors who teach introductory Dynamics classes. In this paper, the software functionality will be explained. The results of the subjective assignment will be detailed, and pedagogical advantages will be clarified via survey results and the comments of students.
This paper will first present the background of the course and reasons for the redesign, including the desired student outcomes. Next, it will discuss the design of the simulation labs, followed by the design and implementation of the hardware-based labs. This discussion will include the key topics covered, the learning objectives of the labs, and the practical challenges in implementation. Finally, data will be presented on student evaluations of the lab experiences, and future changes based on this data will be discussed.
Four lactating cows were confined in metabolism stalls and each given a single oral dose ~f~~~~T e .For the next 5 days, all milk, urine and feces from the cows were collected and the 129mTe content measured. The highest concentration of lmrnTe in the milk was 0.0035%/1.18 hr following administration of the nuclide. The activity decreasedwith a biological half-time in the milk of 38 hr. The total activity transferred to milk was limited with 0.254% of the administered nuclide secreted in approximately 13 days. Thirty hours after dosing 49% of the administered activity had been excreted by all routes. After 5 days 80% of the activity had been recovered with 95% of this activity recovered in the feces. In a companion study three calves were administered radiotellurium orally and sacrificed after varying time periods to determine tissue distribution. The radiotellurium was found to be distributed throughout the body of calves with the main concentration occurring in the kidney and liver.
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