Students learn about the role engineers and mathematicians play in developing the …
Students learn about the role engineers and mathematicians play in developing the perfect bungee cord length by simulating and experimenting with bungee jumping using washers and rubber bands. Working as if they are engineers for a (hypothetical) amusement park, students are challenged to develop a show-stopping bungee jumping ride that is safe. To do this, they must find the maximum length of the bungee cord that permits jumpers (such as brave Washy!) to get as close to the ground as possible without going "splat"! This requires them to learn about force and displacement and run an experiment. Student teams collect and plot displacement data and calculate the slope, linear equation of the line of best fit and spring constant using Hooke's law. Students make hypotheses, interpret scatter plots looking for correlations, and consider possible sources of error. An activity worksheet, pre/post quizzes and a PowerPoint® presentation are included.
(This case study was added to OER Commons as one of a …
(This case study was added to OER Commons as one of a batch of over 700. It has relevant information which may include medical imagery, lab results, and history where relevant. A link to the final diagnosis can be found at the end of the case study for review. The first paragraph of the case study -- typically, but not always the clinical presentation -- is provided below.)
In April 2006, a 28-year-old previously healthy man experienced headache, visual and aphasic speech disturbances. MR-imaging revealed a large, partly cystic mass of the left temporal lobe with significant contrast enhancement (Fig. 1). At surgical resection, due to infiltration of Wernicke's speech area, only subtotal tumor removal was achieved. Subsequent adjuvant therapy consisted of external beam radiotherapy (60 Gy) combined with temozolomide chemotherapy (75 mg/m2). After an uneventful clinical course of 14 months, a follow-up MRI in June 2007 showed a nodular and contrast-enhancing lesion at the anterior aspects of the former resection cavity. At subsequent craniotomy, the recurrent lesion could be dissected from cortical tissue circumferentially and gross total resection was achieved. Second-line chemotherapy with bevacizumab and irinotecan was initiated.
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