Theta Industries

An alternate design using two pushrods (such as that used by Theta Industries) is shown in Figure 7.4. In this configuration,... 

Figure 7.6 Two example LVDT stages offered by Theta Industries. Top constant force system, used for vertically mounted dilatometers and parallel plate viscometers. Bottom horizontally mounted dual pushrod system with leaf springs.

Experimental techniques such as those used to measure specific values of viscosity (e.g. softening point) are still in common use, but are not as powerful as those in which a range of viscosities can be measured. Hence, only the Margules (1 to 106 Pa-s), parallel plate (103 to 108), and beam bending viscometers (107 to 1014 Pa-s) will be discussed here. These devices are manufactured and marketed by Theta Industries. 

Theta Industries, 26 Valley Road, Port Washington, NY, 11050. Phone (516) 883-4088. 

The slag viscosity apparatus was assembled by Theta Industries, Inc. It includes a Lindberg furnace rated for operation at temperatures up to 2732°F (1500°C). The rotating bob viscometer is a Haake RV-2... 

Other suppliers of DSC systems are Bahr Thermoanalyse at www.baehr-themo.de., Linseis at www.linseis.net., Rigaku at www.rigaku.com, and Theta Industries at www.theta-us.com. 

Theta Industries offers the Gravitronic II—1600 0 TGA, a top-loading instrument with a maximum sample capacity of 100 g. This system will support a corrosive environment and vacuum of 10 torr. Also offered is the Gravitronic IV—1100°C DTA/TGA, a vertically oriented bottom-loading system with a maximum sample capacity of 5 g. For more information, see www.theta-us.com. 

Theta Reports. 1775 Broadway, Suite 511, New York, NY 10019, U.S.A. Phone +1 212-262-8230, Fax +1 212-262-8234. E-mail lschacterle thetareports.com. URL http // www.pjbpubs.com/theta/index.htm. Theta Reports, a division of PJB, has been an independent publisher of market research reports for the healthcare sector since 1970. They focus exclusively on the pharmaceutical, biotech, medical device, and diagnostics industries, gathering their information via primary research and industry interviews. They also offer a customized research and analysis service. Theta Reports offer good coverage of world markets in addition to... 

Thermal models of a PCB loaded with detailed models of components in a system can become very complex with many nodes. Such analyses can run for days and weeks, making them impractical. As well, it is often impossible to get detailed models of each component to be used in a system To address these issues, the industry has developed two levels of component thermal abstraction. The first method reduces the electrical component s thermal behavior to two thermal resistances, 6j, which represents the thermal resistance from the active portion of the component to the top component surface, and Theta-jb (0yj), which represents the thermal resistance between the active portion of the component to a point on the PCB at the edge of the component. 

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