About the Author John E. Janssen chaired Standards Project Committee (SPC) 62, which developed ANSI/ASHRAE Standard 62–1989, Ventilation for Acceptable Indoor Air Qualtiy and also served on the SPC that wrote Standard 62–1981. Until his retirement, he was a principal research fellow at Honeywell. Janssen has authored several Journal articles, including “The V in ASHRAE, An Historical Perspectiv...

The top-heavy demographic of low birth-rate and longer lifespan is a growing social problem, and one of its expected effects will be a shortage of young workers and a growing reliance on a workforce of middle-aged and older people. However, the environment of today's industrial workplace is not particularly suited to middle-aged and older workers, one notable problem being temperature control. ...

There is described a control system for the new technology in this paper. That technology, makes it possible to process chromium tannery wastes with the help of enzymatic hydrolysis and was created at the Department of Automatic Control Faculty of Technology UTB in Zlín. The enzymatic hydrolysis process is composed from three parts: fermentation, filtration and drying. In this paper there are d...

A method is reported for controlling substrate temperature during chemical vapor deposition of diamond in high heat flux environments such as thermal plasmas or flames. The method is based on flowing a variable-composition argon-helium mixture through channels between the substrate and a watercooled base. A fiberoptic pyrometer temperature reading from the back of the substrate provides feedbac...

Pharmacological studies of thermoregulatory effector and neuronal responses indicate that nitric oxide (NO) may have differential roles in the control of body temperature and during fever. Histochemical analysis of site-specific changes in NO synthase activity in defined states of thermal stimulation appears a promising approach to unravel the underlying hypothalamic neuronal cytoarchitecture.

This paper presents a Temperature Control Circuit for a microhotplate based gas sensor fabricated in standard 0.35/0.18μm CMOS technology. The on-chip microhotplate provide very high temperatures (between 200oC and 400oC), which are necessary for the normal operation of metal oxide sensing layers. The complete temperature control circuit comprises of 10-bit A/D converter, low pass filter, two 1...

Resource allocation, a problem of increasing importance in control theory (Murray, 2003), involves splitting some quantity and dedicating appropriate proportions of it to optimize some quantity of interest. In “dynamic resource allocation,” allocations are inputs to dynamical system and its response determines the quality of the allocation. For this, feedback information is typically used to re...

Three recent articles (1, 2, 3) describe methods of heat control which seem unnecessarily complicated in view of the present technical development of control tubes in the radio industry. Those methods, just mentioned, use mechanical relays and have wiring schemes which, although not complicated to those acquainted with radio, are nevertheless too difficult for many people to construct. One of t...

In the analysis of the effects of temperature on the performance of microgyroscopes, it is found that the resonant frequency of the microgyroscope decreases linearly as the temperature increases, and the quality factor changes drastically at low temperatures. Moreover, the zero bias changes greatly with temperature variations. To reduce the temperature effects on the microgyroscope, temperature...