Many engineering educators and administrators hope that new learning technologies can help relieve the accreditation and other curricular pressures without loss of learning nor added costs. With so much promise from use of new technologies, we conducted an extensive review of studies seeking evidence of this promise. Over 2,200 studies were reviewed (directly or indirectly) and about 760, which met our criteria, were used. Our review provides convincing evidence that information technologies can enhance learning when pedagogy is sound, and when there is good match of technology, techniques and objectives.

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Dodecane thermolysis was investigated under moderate temperatures and high pressures of N2 or H2. Dodecane is stable below 600 K, whereas under severe conditions it is thermolyzed to give a series of paraffins and olefins up to C22 but with C13 missing. High reaction pressure favors the formation of saturated hydrocarbons and shifts the product distribution toward heavier components. The yield of paraffin plus olefin of the same carbon number decreases with increasing molecular weight, and the yield of the olefin is slightly higher than that of its paraffin counterpart. These observations can be satisfactorily interpreted by a free-radical-chain mechanism with certain modifications. Hydrogen participates in dodecane thermolysis through radical-capping reactions. The pseudofirst-order rate law applies to dodecane disappearance. Recently, Rebick (1981) and Mushrush and Hazlett (1984) also reported some data on hexadecane pyrolysis. Freeradical mechanisms have been shown by the authors, and first-order kinetics was obtained or adopted. Comparison between observed and predicted products by the radical-chain theory gave good agreement (Voge and Good, 1949;Rebick, 1983).The reaction conditions in our study were directed toward relatively low severity because of our interest to use dodecane as a solvent. The confounding effects of the reaction products of the solvent on other reactants were sought.