We use Monte Carlo simulations and real data to assess the performance of methods dealing with measurement error in investment equations. Our experiments show that fixed effects, error heteroscedasticity, and data skewness severely affect the performance and reliability of methods found in the literature. Estimators that use higher-order moments return biased coefficients for (both) mismeasured...

Healthcare professionals have long been concerned with the assessment of human gait, but only recently were they able to utilize instrumental gait analysis in routine clinical practice for diagnosis, and to guide the selection of treatment methods for complex musculo-skeletal and neurological disorders. The development of motion analysis systems has progressed through several stages from simple...

Reference refractivity values have been derived for the anaesthetic agents halothane, isoflurane, enflurane, sevoflurane and desflurane which are traceable to national measurement standards. A simple method and equation have been derived for the application of these data to the measurement of agent concentration by refractometry. The main instrumental sources of uncertainty associated with this...

Factor-based models of emotion (affect) are often used in the field of emotion modeling and emotion measurement, in particular the three factor model commonly known as Pleasure Arousal and Dominance (PAD). This article addresses computational use and usefulness of the third factor, i.e., Dominance. The claim made in this article is that Dominance should be seriously considered when modeling or ...

Fish freshness quality is typically determined by sensory assessment, which relies on the use of trained assessors. Commonly used schemes include Torry and the Quality Index Method (QIM). However it is desirable to find an alternative, instrumental method to provide an objective system for determining fish freshness. Ideally any such method should be reliable, rapid, non-destructive and easy to...

Quality aspects that go beyond the instrumental value of an interactive system are one area of research in the field of user experience. In this paper we describe an approach to the measurement of non-instrumental qualities that defines aesthetic and symbolic aspects as main sub-categories and discuss further relevant sub-dimensions. An exemplary study on three mobile phones is presented that u...

In this paper quality evaluation procedures for hands-free telephones are described with reference to some examples. The paper shortly describes the hearing tests conducted in order to investigate the auditory perceived quality in single talk condition. The parameters found to be most relevant in this situation are listed. Special tests were conducted in order to evaluate the conversational qua...

This paper describes the outcomes of a project that focused on the integration of non-instrumental qualities like aesthetic and symbolic aspects and emotional user reactions with traditional, instrumental-focused approaches to users’ experience of interaction. A research framework is described that conceptualizes user experience as a phenomenon consisting of instrumental and noninstrumental qua...