While much research work was devoted to conceptual model quality validation techniques, most of the existing tools in this domain focus on syntactic quality. Tool support for checking semantic quality (correspondence between the conceptual model and requirements of a domain to be engineered) is largely lacking. This work introduces a lightweight model-driven semantic prototyper to test/validate...

Assessing and analyzing the quality of transmitted speech in a conversational situation is an important topic in current research. For this, a conversation has been separated into three individual conversational phases (listening, speaking, and interaction), and for each phase corresponding quality-relevant perceptual dimensions have been identified. The dimensions can be used to determine the ...

Survival analysis is applied to records for length of productive life of Angus cows, fitting several proportional hazards models. It is shown that a piece-wise Weibull model with a time-dependent stage effect can model the distinct annual culling pattern reasonably well. Analyses fitting a sire model suggest some genetic variability, with heritability estimates on the logarithmic scale ranging ...

Perceptual image quality assessment (IQA) defines/utilizes a computational model to assess the image quality in consistent with human opinions. A good IQA model should consider both the effectiveness and efficiency, while most previous IQA models are hard to reach simultaneously. So we attempt to make another effort to develop an effective and efficiency image quality assessment metric. Conside...

Data are traditionally evaluated using well-defined data models. But results may be variable if the data are not homogenised or standardised. Comparison of actual data with reference data presents a data model which supposes no error. The problem with evaluating positional quality, especially of maps, is a lack of temporal quality, therefore the reference points for evaluation should be chosen ...

Complementary cell suppression has been used for disclosure limitation of magnitude data such as economic censuses data for decades. This paper examines data quality and data confidentiality characteristics of cell suppression. We demonstrate that when cell suppression is not performed using a proper mathematical model, it can fail to protect. Moreover, we demonstrate that properly executed sup...