BACKGROUND Questionnaires translated into languages other than English are often not validated to the same extent as the English versions. This study examined the concurrent and discriminant validity of selected domains related to physical function from Spanish language versions of the Child Health Questionnaire (CHQ), Pediatric Outcomes Data Collection Instrument (PODCI), and Pediatric Evaluat...

Three multivariate methods for predicting death within 1 year for patients discharged after acute myocardial infarction were evaluated: Cox model, discriminant function analysis and recursive partitioning. Discriminant function analysis was utilized to predict a new myocardial infarction (any new or nonfatal infarction). A Cox classification model developed in a population of 260 patients (grou...

This paper presents a modification of kernel-based Fisher discriminant analysis (FDA) to design one-class classifier for face detection. In face detection, it is reasonable to assume “face” images to cluster in certain way, but “non face” images usually do not cluster since different kinds of images are included. It is difficult to model “non face” images as a single distribution in the discrim...

the problem of discrimination between two stationary ar(p) plus noise processes is consideredwhen the noise process are different in two models. the discrimination rule leads to a quadratic form withcumbersome matrices. an approximate and analytic form is given to distribution of the discriminant. thesimulation study has been used to show the performance of discrimination rule. the cumulants of...

The authors have constructed a table of the 592923 nonconjugate totally real cubic number fields of discriminant D < 107, thereby extending the existing table of fields with D < 5 x 105 constructed by Ennola and Turunen [4]. Each field is given by its discriminant and the coefficients of a generating polynomial. The method used is an improved version of the method developed in [8]. The article ...

Let ψK be the Chebyshev function of a number field K. Under the Generalized Riemann Hypothesis we prove an explicit upper bound for |ψK(x)−x| in terms of the degree and the discriminant of K. The new bound improves significantly on previous known results. Math. Comp. 85(298), 889–906 (2016). Electronically published on October 7, 2015. DOI: http://dx.doi.org/10.1090/mcom3031

The mixed discriminant of n Laurent polynomials in n variables is the irreducible polynomial in the coefficients which vanishes whenever two of the roots coincide. The Cayley trick expresses the mixed discriminant as an A-discriminant. We show that the degree of the mixed discriminant is a piecewise linear function in the Plücker coordinates of a mixed Grassmannian. An explicit degree formula i...

Rapidly convergent series are given for computing Epstein zeta functions at integer arguments. From these one may rapidly and accurately compute Dirichlet L functions and Dedekind zeta functions for quadratic and cubic fields of any negative discriminant. Tables of such functions computed in this way are described and numerous applications are given, including the evaluation of very slowly conv...

The perception and production boundaries between a fricative [s] and an affricate [ts] in Japanese were investigated to clarify the relationship between them. Regression and discriminant analyses revealed that the perception and production boundaries between [s] and [ts] were represented by very similar linear functions defined by the variables of rise duration and steady+decay duration. In add...