Chris Chalmers

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OBJECTIVE To investigate levels of follicle stimulating hormone (FSH), as a measure of ovarian function and menopausal symptoms prior to and following hysterectomy in women under the age of 45 years. DESIGN This was a prospective controlled study. SAMPLE A total of 56 hysterectomy patients and 34 controls, up to the age of 42 years, were recruited. (More)
This study investigated the development of group metacognition by three small groups of middle-grade primary school students engaged in the collaborative construction of computer-based mathematical models. The three groups of students were part of a cohort of 30 Grade 4-5 students engaged in the construction of mathematical models within the context of a(More)
The views expressed here are those of the author and do not necessarily represent the views of the Federal Reserve Bank of Philadelphia or the Federal Reserve System. and Rohit Verma for their insights on previous drafts of my work on this topic. Any remaining errors are, of course, my own. Abstract This paper evaluates a model of sequential innovation in(More)
The views expressed here are those of the author and do not necessarily represent the views of the Federal Reserve Bank of Philadelphia or the Federal Reserve System. Abstract: U.S. patent law protects only inventions that are nontrivial advances of the prior art. The legal requirement is called nonobviousness. During the 1980s, the courts relaxed the(More)
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