Ozone hole smaller than last year

A Regular Tetrahedron Passes through a Hole Smaller than Its Face

We prove that no triangular frame can hold a convex body, and a convex body can pass through a triangular hole ∆ if and only if the convex body can be congruently embedded in a right triangular prism with base ∆. Applying these result, we prove that a regular tetrahedron of unit edge can pass through an equilateral triangular hole if and only if the edge length of the hole is at least (1 + √ 2)...

Are Ours Really Smaller than Theirs? Are Ours Really Smaller than Theirs?

The claim is often made that functional programs are \more" expressive than their imperative counterparts. This paper examines this claim using a particular measure of (i) program length and (ii) programming language \level" (a measure of expressive power) both from the work of Halstead on software metrics. This paper was presented at the 1996 Glasgow Functional Programming Workshop, held in Ul...

The 2007 Antarctic ozone hole

Are there species smaller than 1 mm?

The rapid advance in genetic sequencing technologies has provided an unprecedented amount of data on the biodiversity of meiofauna. It was hoped that these data would allow the identification and counting of species, distinguished as tight clusters of similar genomes. Surprisingly, this appears not to be the case. Here, we begin a theoretical discussion of this phenomenon, drawing on an individ...

Are Ours Really Smaller Than Theirs?

The claim is often made that functional programs are “more” expressive than their imperative counterparts. This paper examines this claim using a particular measure of (i) program length and (ii) programming language “level” (a measure of expressive power) both from the work of Halstead on software metrics.