Channel advance

Ghiaasiaan SM, Abdel-Khalik SI (2001) Two-phase flow in micro-channels. Advances in Heat Transfer 34 145-253... 

A memory sweep is initialized when the MCA receives a start pulse from the function generator at the trigger input (7). The start pulse is synchronized with the sweep of the reference voltage (Vr) for the Mossbauer drive. It opens the first MCA channel when the source velocity passes through the minimum (cf. Fig. 3.3). After this start trigger, a train of 512 channel advance pulses follows with exact delay times of about 100 ps each. On receiving such a channel advance pulse, the... 

Zeolites are well known for shape-selective catalysis. Here the shape of the zeolite pores or cavities can control the shape of product. When catalytic reactions take place in channels of zeolites only those products that can be accommodated in the channels advance and emerge. Mobil s ZSM-5 is an example of a shape-selective catalyst. Many more zeolites with different pore sizes or large surface areas are being synthesized, extending the principle of shape-selective catalysis. Such developments are helpful for both existing industrial processes and environmental protection. 

ChoiceDek Channeled Advanced Environmental Recycling Technologies, Inc. HDPE, wood fiber 100... 

The time-mode system dispenses entirely with the A.D.C. processing. The channel address is advanced sequentially under the control of a very accurate crystal oscillator with a dwell time in each channel of say 50 or 100 /is. While a channel is open it accepts all input pulses from the detection system. The only dead-time is that incurred during the channel advance, and this is only... 

The normal experimental technique is to scan rapidly through the velocity range and repeat this scan many times imtil data of the required accuracy has been accumulated. The Doppler motion is provided by an electromechanical drive system controlled by a servo -amplifier. Usually, the source is attached to the drive shaft and driven either in a saw-tooth or a triangular constant acceleration wave form. The transducer is coupled to a multichannel analyser operating in the multiscaler mode, and the servo-amplifier is controlled by the channel advance frequency. The dwell time in each channel, corresponding to a specific velocity increment, is 100 ps, and while the channel gate is open it accepts pulses from the detector. 

Information on other types of weirs can be obtained from Addison, op. cit. Gibson, Hydraulics and Its Applications, 5th ed.. Constable, London, 1952 Henderson, Open Channel Flow, Macmillan, New York, 1966 Linford, Flow Mea.surement and Meters, Spon, London, 1949 Lakshmana Rao, Theory of Weirs, in Advances in Hydroscience, vol. 10, Academic, New York, 1975 and Urquhart, Civil Engineering Handbook, 4th ed., McGraw-HiU, New York, 1959. 

A significant recent experimental advance is the introduction of tandem mass spectrometers for studying ion-molecule reactions. Examining various isotope effects as a function of translational energy can provide detailed information about reaction mechanisms. Tandem experiments can also observe many of the possible reaction channels for a given collision complex. Such information provides valuable clues to the chemical and physical nature of the intermediates in ion-neutral interactions. 

Knight RW, Hall DJ, Goodling JS, Jaeger RC (1992) Heat sink optimization with apphcation to micro-channels. IEEE Trans Comp Hybrids Manuf Technol 15 832-842 Kohl MJ, Abdel-Khalik SI, Jeter SM, Sadowski DL (2005) An experimental investigation of microchannel flow with internal pressure measurements. Int J Heat Mass Transfer 48 1518-1533 Lasance CJM, Simons RE (2005) Advances in high performance cooling for electronics. 

PhUlips RJ (1990) Micro-channel heat sinks. In Bar-Cohen A, Kraus AD (eds) Advances in thermal modeling of electronic components and systems, vol 2, pp 109-184 Plosl A, Krauter G (1999) Wafer direct bonding tailoring adhesion between brittle materials. Mater Sci Eng R25 92-98... 

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