The standard method described by Barker and Summerson for measuring lactic acid concentration has been modified to give a simpler more rapid procedure, which is applicable plasma or other biological fluids, convenient routine laboratory analyses.

We present a discussion and description of collection FORTRAN routines designed to aid in the assessment initial value methods for ordinary differential equations. Although overall design characteristics are similar those earlier testing packages [2,6] that were used comparison [5,7], details objectives current quite different. Our principal objective is development tools can be assess efficiency reliability standard numerical method without requiring significant modifications themselves...

To the Editor.— The attempt by Dr. Elveback and her colleagues to exorcise ghost of Gauss ( 211 :69-75, 1970), calls for some comment. As they state, was primarily concerned with theory errors, but components in an error distribution are analogous those any other type measurement. If I measure length a table ruler should get single answer; however, lengths vary temperature humidity, there parallax errors reading ruler, so do not constant reading. Since three definable sources variation,...

Abstract Normal values for glucose, lactate, and protein in cerebrospinal fluid have been established the relationships among them studied. concentration is related to age. Glucose lactate are correlated with each other sex By technique of pattern appreciation, these estimations provide a useful confirmatory test cerebrovascular accidents differentiating intracranial hemorrhage from types accident bloody spinal taps, they considerable prognostic value assessing milder cases. They also...

daesa , <u>D</u>ifferential-<u>A</u>lgebraic <u>E</u>quations <u>S</u>tructural <u>A</u>nalyzer, is a M atlab tool for structural analysis of differential-algebraic equations (DAEs). It allows convenient translation DAE system into and provides small set easy-to-use functions. can analyze systems that are fully nonlinear, high-index, any order. determines index, number degrees freedom, constraints, variables to be initialized,...

This article presents the first extended set of results from EliAD, a source-transformation implementation vertex-elimination Automatic Differentiation approach to calculating Jacobians functions defined by Fortran code (Griewank and Reese, Algorithms: Theory, Implementation, Application, 1991, pp. 126--135). We introduce necessary theory in terms well known algorithms numerical linear algebra applied linear, Jacobian system that prescribes relationship between derivatives all variables...

The author and colleagues have produced a collection of 60 test problems which offer realistic performance the currently available automatic codes for eigenvalues classical Sturm-Liouville problem. We describe Fortran implementation considerations that went into its design. A novel feature is (almost) all code defining one problem textually contiguous in text, unlike example DETEST package ODE initial-value solvers where definition spread over several routines. described forms infrastructure...