The author shows that the use of high-resolution spectrum estimation methods instead of Fourier-based techniques can improve the accuracy of measurement of spectral parameters of distorted waveforms encountered in power systems, in particular the estimation of the power quality indices (such as inter/harmonic groups and subgroups). The comparison of the frequency and amplitude estimation error,...

When incomes are ranked in descending order the social-evaluation function corresponding to the Gini relative inequality index can be written as a linear function with the weights being the odd numbers in increasing order. We generalize this function by allowing the weights to be an arbitrary non-decreasing sequence of numbers. This results in a class of generalized Gini relative inequality ind...

background: several studies showed the relationship of obesity and overweight with body mass index. according to these studies, because of severe complications of obesity and overweight we wanted to indicate the outbreak rate of obesity and overweight in the certain group of veterans. methods: this study was cross-sectional in design. the numbers of subjects was 106 individuals in isfahan city....

the pollution of aquatic ecosystems may affect natural reproduction of fish populations by decreasing the fertilization efficiency. among the various sources of pollution, heavy metals are important group, being found in both freshwater and marine environment. the present study investigated changes of sperm characteristics of caspimyzon wagneri when exposed to manganese (mn). spermatozoids were...

Although many approaches have been presented to compute and predict readability of documents in different languages, the information provided by readability systems often fail to show in a clear and understandable way how difficult a document is and which aspects contribute to content readability. We address this issue by presenting a system that, for a given document in Italian, provides not o...

Williams et al. (1976) have suggested the use of Guttman scaling for scoring an index of disability. Two examples confirm the applicability of this method in the context of survey research. One of these examples is of a disablement scale widely employed in local authority social services research. For the purpose of survey assessment of disabled populations, the precise choice of scaling method...

In a clinical context, the term "overweight" usually connotes adiposity, an excess of body fat. In the absence of any direct or simple indirect methods of measuring total body fat, medical research workers often use formulae (indices) which relate body weight to stature. So far as we know, the uses and limitations of such formulae have never been critically examined. It is obvious that no formu...

In this talk we consider some results and open problems from the Chemical Graph Theory, mainly concerning structural indices/properties. The Atom Bond Connectivity index, also known as ABC index was defined by Estrada [4] with relation to the energy of formation of alkanes. It was quickly recognized that this index reflects important structural properties of graphs in general. The ABC index was...

Myanmar and Thailand often experience severe droughts and floods that cause irreparable damage to the socio-economy condition of both countries. In this study, the Southeastern Asian Summer Monsoon variation is found to be the main element of interannual precipitation variation of the region, more than the El Niño/Southern Oscillation (ENSO). The ENSO influence is evident only during the boreal...

Diversity indices are frequently applied in the form of ratios of absolute diversity to the maximum diversity possible. Regardless of whether the maximum diversity is defined to be limited by the number of species or by the number of individuals present, the resultant indices can be shown to possess mathematically undesirable qualities. All such indices, including equitability as measured by Pi...