Methods for defining user groups and user-adjusted information structures

1999

A common problem in the design of information systems is how to structure the information in a way that is most useful to different groups of users. This paper describes some statistical methods for revealing the structure inherent in empirical data elicited from users. It is illustrated by the application of these methods to the design of some web pages giving information about the Universitat de Valencia. Three potential user groups were identified, administrative staff, teaching staff and students. The first analysis demonstrated that users within these three groups assign relatively homogeneous structures, but that the structures assigned by the three groups are not the same, and also, …

Serum nitrotyrosine and psychometric tests as indicators of impaired fitness to drive in cirrhotic patients with minimal hepatic encephalopathy

2013

BACKGROUND & AIMS: Cirrhotic patients with minimal hepatic encephalopathy (MHE) show impaired driving ability and increased vehicle accidents. The neurological deficits contributing to impair driving and the underlying mechanisms are poorly understood. Early detection of driving impairment would help to reduce traffic accidents in MHE patients. It would be therefore useful to have psychometric or biochemical parameters reflecting driving impairment. The aims of this work were as follows: (i) to shed light on the neurological deficits contributing to impair driving; (ii) to assess whether some psychometric test or biochemical parameter is a good indicator of driving impairment. METHODS: We a…

Computing Sum of Products about the Mean with Pairwise Algorithms

1997

We discuss pairwise algorithms, a kind of computational algorithm which can be useful in dynamically updating statistics as new samples of data are collected. Since test data are usually collected through time as individual data sets, these algorithms would be profitably used in computer programs to treat this situation. Pair-wise algorithms are presented for calculating the sum of products of deviations about the mean for adding a sample of data (or removing one) to the whole data set.

Por la Ilustre Ciudad de Valencia, y Onofre Sanz, credenciero del peso de sus carnicerias mayores, con Pedro Valero, que siruio el mismo oficio por l…

Texto signat per "Tapies de Solà" Precedeix al títol: "Iesus Maria Ioseph y Santo Thomas de Aquino" Data a la fi del text, en Valencia à 2 de Junio de 1695 Sign.: [A]2, B-G2 Reclams Portada amb orla tipogràfica i gravat xilogràfic de la Verge Caplletra ornada