This paper introduces a low-cost LEGO Mindstorms NXT motor system for teaching classical and modern control theories in standard third-year undergraduate courses. The LEGO motor system can be used in conjunction with MATLAB, Simulink, and several necessary toolboxes to demonstrate: 1) a modeling technique; 2) proportional-integral-differential…

These days, multiplying two numbers together is a breeze. One just enters the two numbers into one's calculator, press a button, and there is the answer! It never used to be this easy. Generations of students struggled with tables of logarithms, and thought it was a miracle when the slide rule first appeared. In this article, the author discusses…

Background: To demonstrate the feasibility of outpatient endometrial sampling to evaluate abnormal uterine bleeding in a population of women with intellectual disability. Method: Retrospective chart review was completed of all endometrial biopsies performed on women attending a dedicated gynaecology clinic for women with intellectual disability…

The entire issue is a list of laboratory instruments and equipment and the names and addresses of their manufacturers. Names of instruments appear in alphabetical order; names of manufacturers of each instrument appear below each instrument entry. The complete name, address, and telephone number of each manufacturer are found in a separate section…

This article describes the six regional instrumentation facilities established by the National Science Foundation. These centers make available to scientists state-of-the-art instrumentation such as: gas chromatographs; lasers; NMR spectrometers; X-rays; and others. (CS)

Listed are available control parameters including basic definitions and concepts and methods of measurement. The application of these parameters to the control of water and wastewater treatment plants is also outlined. (CS)

Presents the construction aspects of a simple but reliable colorimeter made from locally available components. Notes the absorption range to be 400-750-nm. Lists seven experiments done on the instrument. (MVL)