I am looking for other opinions on the following that has come to my attention: Seongtaek Seo (2013) Orthogonal Projection & Run or Walk in the Rain? European Journal of Scientific Research ISSN 1450-216X / 1450-202X Vol. 113 No 4 October, 2013, pp.560-570 Abstract: In this paper, we will find the orthogonal projected length or area of some figures. Especially it will show the simplest way to find the orthogonal projected area of ellipsoid. And then we apply them to the problem “Run or walk in the rain?” We will consider that the objects move in the rain in a given time as well as in a given distance. And we also take into account an object which moves leaning its body. By a simple method in this paper, we can check the conclusions the previous authors pointed out. Furthermore we can obtain the new formulas and results. So I think, at least in theory, this paper will show the way to reach the final conclusion about this problem. Background see the author's original thread. I don't know what to think about the journal ... a pdf of the paper is attached to the linked thread. Is that typical of the sort of thing they publish? The author basically works out the volume that various primitives (rectangular prism, spheroid, cylinder) sweep out and multiplies this by the number density of raindrops ... the whole thing looks like it's done in the reference frame of the ground. I think the conclusion is that running is better than walking, provided you run at the right angle to the rain. This appears to contradict simple experiments conducted using natural running vs walking in simulated in-Nature weather. Author thinks there is application to astrophysics.