Entrevista com Nelson Leirner

Estudio experimental de la efectividad de la entrevista abierta frente a la entrevista independiente de contexto

Resumen. OBJETIVO: Estudiar la efectividad relativa de las técnicas de entrevista abierta y entrevista independiente de contexto en la identificación de requisitos para sistemas software. MÉTODO: Experimento controlado ensayando dos factores: “tipo de entrevista” (abierta e independiente de contexto) y “tipo de problema” (identificación de requisitos para dos sistemas software distintos). Debid...

Genetics: Nelson and Lederberg

* Th(e work reporte(I in this article( was carried( out und(ler Contract No. AT-(30-1)-1151, United St at4s Atomiic Energy Conimnissioi. S. Wright and Th. Dohzhansky, Genetics, 31, 125-156, 1946. 2 E. Spiess, Evolution, 4, 14-33, 1950. 3 A. B. Da Cunha, Evolution, 5, 395-404, 1951. 4Th. Dobzhansky and 0. Pavlovsky, Evolution, 7, 198-210, 1953. 5 H. Levene, 0. Pavlovsky, and Th. Dobzhansky, Evol...

Characterisations of Nelson Algebras

Nelson algebras arise naturally in algebraic logic as the algebraic models of Nelson’s constructive logic with strong negation. This note gives two characterisations of the variety of Nelson algebras up to term equivalence, together with a characterisation of the finite Nelson algebras up to polynomial equivalence. The results answer a question of Blok and Pigozzi and clarify some earlier work ...

Nelson–Aalen Estimator

The Nelson–Aalen estimator is a nonparametric estimator which may be used to estimate the cumulative hazard rate function from censored survival data (see Survival Distributions and Their Characteristics). Since no distributional assumptions are needed, one important use of the estimator is to check graphically the fit of parametric models, and this is the reason why it was originally introduce...

Kinetic Theories by Paul Nelson*