Describes a novel method for inducing and measuring cosmic ray showers using a low-cost, microcomputer-based laboratory system. Uses low counting-rate radiation monitors in the reproduction of Bruno Rossi's classic experiment. (Contains 16 references.) (Author/YDS)

Two experiments examined the role of analogy in the development of a situation model of a target passage, specifically, whether an analogous source text could improve comprehension and inferencing about causal mechanisms in the target. Responses of analogy subjects were more likely to include given and inferred information that comprised the…

A teacher of students with hearing impairments outlines ways to integrate use of the scientific method into science laboratory experiences. A sample experiment is outlined, and the value of the applied science experiences for students who are concrete learners is stressed. (DB)

Institutions of higher education that use animals in laboratory research have become targets of intense scrutiny regarding the treatment of those animals, the value of research, and the amount of federal funds they receive. The largest and most active animal-rights organization is People for the Ethical Treatment of Animals. (MLW)

Presented is a brief history of manufacturing chocolate and an outline of production methods. Describes laboratory techniques used to monitor liquid chocolate viscosity. Discusses a simple experiment which can be performed in the classroom. (Author/CW)

Uses inexpensive equipment to demonstrate, through factorial design, an interaction between genetics and environment. Provides instructions for introducing and conducting the experiment, reporting that significant results are usually obtained. Notes the exercise is appropriate for experimental psychology, developmental psychology, behavior…

Describes some experiments showing both qualitatively and quantitatively that aerodynamic lift is a reaction force. Demonstrates reaction forces caused by the acceleration of an airstream and the deflection of an airstream. Provides pictures of demonstration apparatus and mathematical expressions. (YP)

Explains the lifting force based on Bernoulli's law and as a reaction force. Discusses the interrelation of both explanations. Considers accelerations in line with stream lines and perpendicular to stream lines. (YP)

Provides the apparatus setup, experimental method, necessary formulas, and references for three measurement experiments: (1) "Determine the Magnetic Induction of a Coil with a Hall Element"; (2) "Measuring Magnetic Force and Magnetic Field of Small Permanent Magnets"; and (3) "Measurements of Sound Velocity by Means of PZT" (piezoelectric…

The logical flaw of using the methods of path analysis and structural equation modeling to make causative conclusions is demonstrated. A proper evaluation of the role of investigation versus experimentation is cited in the work of W. G. Cochran as explicated by D. R. Rubin (1983). (TJH)

Described is a mechanically driven device for generating three-dimensional harmonic space figures with different frequencies and phase angles on the X, Y, and Z axes. Discussed are apparatus, viewing stereo pairs, equations of motion, and using space figures in classroom. (YP)

Provides an overview of a graduate course on particulate processes, especially on crystal size distribution (CSD). Describes the course and includes a list of course topics. Discusses the CSD simulation and manipulation. (YP)

Describes the theory and application of an atomic fountain which pushes the atoms by laser pulses. Discusses the applications in measuring atomic properties and in building an atomic clock. (YP)

Proposes a simple procedure based on an expansion of the exponential terms of Raoult's law by applying it to the case of the benzene-toluene mixture. The results with experimental values are presented as a table. (YP)

Reports an experiment for examining protein-ligand binding using the enzyme carbonic anhydrase. Describes the experimental procedures consisting of the syntheses of an azosulfonamide and its complex formation with carbonic anhydrase. (YP)