Time's up! The color-changing self-expiring badge

Article Abstract:

An overview is presented on using color-change technology for security-clearance items such as visitor badges and parking permits, in which a gradual chemical process produces a change in color indicating an item has expired. The article focuses on visually changing paper (VCP), which uses inexpensive materials, has a long shelf-life prior to activation, and is consistent in producing a color change after a specified time.

United States, Analysis, Usage, Product development, Equipment and supplies, Color, Photochemical research, Photosensitizing compounds, Photosensitizing agents, Security clearances, Badges

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The Changing Workstation

Article Abstract:

Word processing software is the key to office automation. Word processing packages and their functions are reviewed. Data processing suppliers are integrating word processing into their systems. Electronic mail, filing and diary systems, and graphics are also a part of management workstations. Local area networks (LANs) will be integrating voice, data, text, and video. The development of expert systems is detailed.

Technology, Expert systems, Office automation, Local area networks, LAN, Word processing, Workstations, evaluation, Software Packages, Trends, Executive, Integrated Approach

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Wind in America: the changing landscape

Article Abstract:

In ten years, the windmill industry has labored to harness an old technology to new electricity needs. The article discusses the advances of the twenty domestic manufacturers of the world's total of 320: horizontal vs. vertical, upwind vs. downwind, rotor controls and materials, generators, towers, installation, marketing, ownership and control, and how to rate wind turbines.

Farm machinery and equipment, Innovations, Electric power generation, Wind power, Air-turbines, Wind turbines, Electric power production, Windmills

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