Security Extension for IEEE Std 1149.1

A security extension for IEEE Std 1149.1 is proposed. It provides a locking mechanism which prevents unauthorised users to interfere via test bus with the system normal operation. The security extension requires small hardware overhead and allows full conformance with IEEE Std 1149.1.     

On the complexity of finding a local maximum of functions on discrete planar subsets

We study how many values of an unknown integer-valued function f one needs to know in order to find a local maximum of f. We consider functions defined on finite subsets of discrete plane. We prove upper bounds for functions defined on rectangles and present lower bounds for functions defined on arbitrary domains in terms of the size of the domain and the size of its border.     

Selective treatment of lube fractions with phenol in the presence of surfactants

Translated from Khimiya i Tekhnologiya Topliv i Masel, No. 1, pp. 8–9, January, 1995.     

Misuse and abuse cases: getting past the positive

Software development is all about making software do something: when software vendors sell their products, they talk about what the products do to make customers' lives easier, such as encapsulating business processes or something similarly positive. Following this trend, most systems for designing software also tend to describe positive features. The authors provide a nonacademic introduction to the software security best practice of misuse and abuse cases, showing you how to put the basic science to work.     

Influence of the molecular weight of ionenes on the cobaltphthalocyanine-catalysed autoxidation of mercaptoethanol

In order to study the promoting effect of polycations on the cobalt(II)phthalocyanine-tetrasodiumsulphonate (CoPc(NaSO₃)₄)-catalysed autoxidation of thiols, it is imperative to know the molecular weight dependence of the polymer. Monodisperse oligomers can often supply a lot of information. To elecidate the mechanism of the promoting effect of 2,4-ionene, a poly(quaternary ammonium)salt, on the CoPc(NaSO₃)₄-catalysed autoxidation of 2-mercaptoethanol, a series of monodisperse 2,4-ionene oligomers were prepared. Trimeric 2,4-ionenes, containing two quaternary ammonium groups separated by four methylene groups, showed a high co-catalytic activity, and active Co-aggregates were detected with visible light spectroscopy. The spectroscopic behaviour was in close agreement with that of high molecular 2,4-ionene/CoPc(NaSO₃)₄ complexes. In order to achieve this aggregation several oligomeric ionenes have to act concertedly. If the distance between the ionic sites is short the trimer acts as a simple salt in stablizing the aggregates. With respect to the catalytic activity the optimum polycation/catalyst ratio, expressed as the N⁺/Co ratio, decreased with increasing chain lenght and reached a constant level of 50 at a 2,4-ionene nonamer. For the trimers and pentamers this ratio is affected by the type of end-group. All synthesized 2,4-ionene oligomers exhibited excellent co-catalytic properties at the optimum N⁺/Co ratio, with maximum turnover frequencies of 4600 mol thiol/(mol Co s), i.e. 50 times higher than those obtained for the polymer-free system. In the case of monodisperse 2,4-ionene pentamer with bromo end-groups, double Michaelis–Menten kinetics were observed, as also was exhibited by high molecular weight ionene.     

A multidimensional wave digital filter bank for video-based motion analysis

Multidimensional wave digital filters (MDWDF) exhibit the same desirable properties as 1D WDFs, most notably including passivity and therefore guaranteed stability as well as high robustness. A possible application for such MDWDFs may be found in motion analysis of image sequences by means of filters with fan-shaped transfer functions, where content with specific movement information can be extracted. For that matter, a parallel filter bank is needed to differentiate object motion into separate classes. In this paper, a new specialized MDWDF fan filter structure is introduced, possessing both reduced computational complexity and memory requirements compared to existing approaches. Additionally, part of the processing can be shared among all bands, further increasing efficiency.