Quantitative spectral types for 19 Algol secondaries

On the late spectral types of cataclysmic variable secondaries

We investigate why the spectral type of most cataclysmic variable (CV) secondaries is significantly later than that of a ZAMS star with the same mean density. Using improved stellar input physics, tested against observations of low–mass stars at the bottom of the main sequence, we calculate the secular evolution of CVs with low–mass donors. We consider sequences with different mass transfer rat...

Lecture 19: Spectral Clustering

We are given n data points x1, . . . , xn and some way to compute similarities between them, call si,j the similarity between the n points. Assume that the similarity function is symmetric, so si,j = sj,i. For the purposes of this lecture let us just consider the simplified clustering problem where we would like to split the dataset into two clusters. We would like to find a subset S ⊂ [n] of s...

Liver Resection for Colorectal Secondaries

From 1960 to 1988, 266 patients underwent resection of colorectal secondaries to the liver with curative intent. All patients were followed until April 1, 1990, or death, with a median follow-up time of 52 months. Nine patients with minimal macroscopic residual disease and 38 patients with all gross tumor removed but positive margins showed a poor prognosis with a median survival time of 13.3 m...

Algol-Genius

Algol-Genius, an Algol 60 implementation with features from COBOL, was the brainchild of Börje Langefors. In 1964, assembler was the dominant programming language, but Algol-Genius broke that trend among Datasaab D21 customers. Algol-Genius programs were still in production in the late nineties.

Quantitative Types for the Linear Substitution Calculus