A vectorial representation of the full sequence of events occurring during the 2D-NMR heteronuclear single-quantum correlation (HSQC) experiment is presented. The proposed vectorial representation conveys an understanding of the magnetization evolution during the HSQC pulse sequence for those who have little or no quantum mechanical background.…

Seeks to identify some of the issues associated with the role of models in scientific explanations. Develops a typology of explanations and explores the notion of appropriateness in scientific explanations. Investigates the nature of models and their contribution to explanations. (DDR)

This paper explores the nature and structure of scientific models by taking the position that representations are not models themselves. Representations of models are essential tools for communicating and conversing about the scientific models underlying them. A scientific model is considered to be a set of ideas that describe a natural process. A…

Proposes a two-step model of discovery in which new scientific hypotheses can be generated and subsequently tested. Applying advanced natural language processing techniques to find biomedical concepts in text, the model is implemented in a versatile interactive discovery support tool. This tool is used to successfully simulate Don R. Swanson's…

Argues that discussing theories, including their origin, development and replacement by other theories, can help students understand both the objective and subjective aspects of the scientific process. (DDR)

Argues that Albert Einstein preceded Karl Popper in formulating the fundamental premises of hypothetism. Presents the original text and ideas from an article published by Einstein in 1919. (DDR)

Provides historical information on the incorporation of physics as a subject into secondary schools in Spain. Cites religious and political tensions as early roadblocks to curriculum development. (DDR)

Describes the first moon-radar echo experiment conducted by Zoltan Bay in Hungary and comments on Bay as a model for contemporary physics education. (DDR)

Addresses two research questions pertaining to the search for students' potential alternate conceptions within the history of science and the possibility of helping students overcome these misconceptions through historical experiments. Contains 19 references. (DDR)

This paper reports on the evaluation of an 11-week curriculum created to foster seventh grade students' understanding of scientific modeling. In the curriculum, students engaged in model-oriented activities such as creating non-Newtonian computer microworlds to embody their conceptual models, evaluating their models with criteria, and reflecting…