Page 225 - 6202

compounds in the adsorbed phase which is catalyzed by the carbon surface in the
presence of molecular oxygen. This study was conducted to determine the origin
of the catalytic properties of activated carbon surface towards these reactions.
Particular emphasis was directed towards various metals and metal complexes
imbedded in the activated carbon graphite crystalline structure. Adsorption
isotherm studies performed in the presence and absence of oxygen using the
same adsorbate (o-cresol) and different types of activated carbons were utilized
as a preliminary screening tool in determining surface characteristics that
influence the catalytic properties of activated carbon. The presence of Fe on the
carbon surface is related to the ability of that activated carbon to promote
polymerization of 2-methylphenol. Furthermore, the adsorptive capacity of
activated carbon for molecular oxygen correlates well with the irreversible
adsorption promoted by the GAC surface. [Bourdeau, Jacob et al. Activated
carbon as a catalyst for polymerization ofphenolic compounds// Critical Issues in
Water and Wastewater Treatment National Conference on Environmental
Engineering 1994. Proceedings. Publ. by ASCE, New York, NY, USA, p. 756].
•  Wide differences in test signals used for analog and digital circuits make a
common test for a mixed-signal device difficult. A divide and conquer strategy
partitions the circuit into three types of blocks: analog, digital logic and memory.
A design for testability structure using boundary scan and analog test bus allows
very effective test application. With this design, separate specialized tests are
applied to analog and digital parts, as well as to interconnects. While the
partitioned architecture provides a reasonable test solution, weakness remains in
the test of block interfaces. Research on unified analog-digital tests is
recommended. Delay tests and current measurement tests might be possible
candidates. [Agrawal, Vishwani D. Testing in a mixed-signal world//
Proceedings of the 1996 9th Annual IEEE Internationa' ASIC Conference and
Exhibit. Rochester, NY, USA, p. 241].
•  Receniiy, much press has been given to DSP implementations in programmable
logic, often on tie strength of a few simple benchmarks. This paper will examine
more complicated DSP systems design in programmable logic, starting with an
analysis of the support models required from the device vendors, and the new
tools that will be needed. A set of examples, from simple to complex, that have
been designed with initial versions of the tools called for in this paper will be
presented. Finally, some methods for achieving high performance designs in
programmable logic will be described. [Langhammer, Martin. DSP
implementation in programmable logic// Proceedings of the 1996 9th Annual
IEEE International ASIC Conference and Exhibit. Rochester, NY, USA, p. 211].
•  The photodegradation of TNT in a TiO sub (2) slurry reactor was studied as both
a potential treatment technique for the remediation of water with munitions
contamination and to gain further insight into the behavior of a nitroaromatic
compound in a photocatalytic system. Photocatalytic and direct photolytic
reactions were compared by evaluating rates and extent of TNT transformation
and mineralization in the presence and absence of oxygen. Nitrate, nitrite, and
ammonium ion concentrations were determined and mass balances on carbon
and nitrogen were performed for the catalytic system. [Gray, Kimberly et al.
Photocatalytic transformations and degradation of 2,4,6-tirnitrotoluene (TNT) in

218