It is shown that the integral of the autocorrelation function of freestanding layered films determines the square of the mean electron density in the film cross section. data-processingtechniques are proposed to deal...
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It is shown that the integral of the autocorrelation function of freestanding layered films determines the square of the mean electron density in the film cross section. data-processingtechniques are proposed to deal with the results of reflectometry measurements for films on substrates. Comparison of the autocorrelation functions calculated on the basis of the experimental curve and the model provides an opportunity to evaluate the sample quality.
The article discusses model driven engineering techniques in computer software design, and the difficulties of testing automatic model transformations. A fault in one model system can propagate into another during thi...
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The article discusses model driven engineering techniques in computer software design, and the difficulties of testing automatic model transformations. A fault in one model system can propagate into another during this process, but the changes induced by the transformation often make it difficult to systematically isolate the source of the problem. An example is provided which involves flattening hierarchies and meta-models. The difficulties which arise from the translation of complex data between heterogeneous computer languages is discussed. Potential solutions to some of these problems are also presented, involving the construction of oracles, meta-heuristics, and the use of white-box testing.
The article discusses the management of problems related to old software. The author says that software development is a fluid field where the comparative effectiveness and expectation from a particular application ch...
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The article discusses the management of problems related to old software. The author says that software development is a fluid field where the comparative effectiveness and expectation from a particular application changes with time. He suggests that any code he developed 10 years ago would look full of technical deficiencies today. It is suggested that scrapping the software and rebuilding it from the scratch is the most feasible option in such a case. He thinks that they should make clients understand that rebuilding the software is an easier option with the help of new technology like structured programming etc. This would save the skins of designers and satisfy clients as well.
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