Comparative study of the sensitivity and specificity of the zinc and acid phosphatase spot tests for the detection of seminal stains

The sensitivity and specificity of a zinc spot test for the detection of semen were compared with those of an acid phosphatase detection method. As screening techniques both tests were found to be very sensitive, but the zinc test was more specific and was more reliable in older and especially in deteriorated specimens. It is concluded that the zinc spot test deserves at least the same place as the acid phosphatase test in the primary investigation of suspected semen stains and might well be the test of choice in older and poorly preserved stains.     

Public preferences about government spending: Partisan,social, and attitudinal sources of policy differences

Although the causes and consequences of the growth of government have become the focus of increasing scholarly attention, relatively little empirical research has been done about the nature and determinants of individual fiscal preferences. The present study analyzes patterns of partisan, socioeconomic, and attitudinal differentiation in public spending preferences for a variety of government functions. Two important findings emerge from our analysis. First, attitudes about the adequacy of government spending for each of the functions considered are shown to have two dimensions—a support for spending dimension and a support for change dimension. Second, the patterns of partisan and socioeconomic cleavages about government spending are shown to vary significantly across policy domains. This fracturing of demand structures, it is argued, may be one of the root causes of the performance crisis of political institutions.     

Color separation in forensic image processing

In forensic image processing, it is often important to be able to separate a feature from an interfering background or foreground, or to demonstrate colors within an image to be different from each other. In this study, a color deconvolution algorithm that could accomplish this task is described, and it is applied to color separation problems in document and fingerprint examination. Subtle color differences (sometimes invisible to the naked eye) are found to be sufficient, which is demonstrated successfully for several cases where color differences were shown to exist, or where colors were removed from the foreground or background. The software is available for free in the form of an Adobe Photoshop-compatible plug-in.