Detecting extraterrestrial gravity

Article Abstract:

Steps in constructing a 'gravimeter,' such as the one built by Roger Baker of Austin, Texas, are detailed. The gravitational forces from the sun and moon are subtle in comparison with other forces, and normally difficult to detect.

Author: Carlson, Shawn
Publisher: Scientific American, Inc.
Publication Name: Scientific American
Subject: Science and technology
ISSN: 0036-8733
Year: 2000
Measurement, Gravity, Gravity (Force), Gravity waves, Gravity waves (Meteorology)

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Home is where the ECG is: watch your heartbeat with do-it-yourself equipment

Article Abstract:

A simple electrocardiograph can be constructed from an amplifier and filter circuit, an instrumental amplifier, and an oscilloscope. Instructions and diagrams are provided.

Author: Carlson, Shawn
Publisher: Scientific American, Inc.
Publication Name: Scientific American
Subject: Science and technology
ISSN: 0036-8733
Year: 2000
Equipment and supplies, Electrocardiography, Electrocardiograph, Electrocardiographs

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Boids of a feather flock together

Article Abstract:

Computer simulated birds may be created using software developed by Craig Reynolds. The virtual creatures may be shown to imitate flocks of real birds.

Author: Carlson, Shawn
Publisher: Scientific American, Inc.
Publication Name: Scientific American
Subject: Science and technology
ISSN: 0036-8733
Year: 2000
Behavior, Computer programmers, Computer simulation, Reynolds, Craig

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Subjects list: Research, United States
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