An Experimental Study of Unsteady Flows Generated in Kojima Lake

The global positioning system (GPS) is utilized for analysis of flows in the water environment. A float equipped with a GPS unit is designed to drift on the surface of the water. Its driving force is the fluid resistance exerted on a pair of rectangular plates. While it travels over the surface, the GPS unit evaluates its position every second, and spatiotemporal data that specify its motion are transmitted to be recorded. Results of experiments conducted to study unsteady flows generated in Kojima Lake are introduced

Packing squares independently

Given a set of squares and a strip of bounded width and infinite height, we consider a square strip packaging problem, which we call the square independent packing problem (SIPP), to minimize the strip height so that all the squares are packed into independent cells separated by horizontal and vertical partitions. For the SIPP, we first investigate efficient solution representations and propose a compact representation that reduces the search space from $\Omega(n!)$ to $O(2^n)$, with $n$ the number of given squares, while guaranteeing that there exists a solution representation that corresponds to an optimal solution. Based on the solution representation, we show that the problem is NP-hard, and then we propose a fully polynomial-time approximation scheme (FPTAS) to solve it. We also propose three mathematical programming formulations based on different solution representations and confirm the performance of these algorithms through computational experiments. Finally, we discuss several extensions that are relevant to practical applications.Comment: 15 page

Studies on Hemagglutination and Hemolytic Test Part 2. On the hemolytic test by the sensitized red blood cells with bacterial polysaccharide

1. The sheep red cells sensitized with bacterial polysaccharide are dissolved by spcific antipolysaccharideserum and complement. 2. In this hemolytic test, the amount of the red cells run parallel to the amount of complement. 3. At first sensitized red cells are mixed with the antiserum, thereafter complement is added to this mixture, so the hemolytic test is inhibited because the red cells are already agglutinated by the antiserum

Studies on Hemagglutination and Hemolytic Test Part. 4. On the hemolytic test by ricin agglutinated red blood cells and on ricin and antiricinserum

1. The agglutination by ricin occurs more slowly than immune reaction. 2. The agglutinated red cells by ricin are not completely dissolved, in spite of sufficient haemolysine and complement added. 3. The antiricin of rabbit neutralizes the hemagglutination of ricin and toxity to mouse, according to precipitin test by Ramon

Experimental and Computational Water Analysis for Kojima Lake

We study a wind-generated current in Kojima Lake. We introduce an experimantal result which was obtained using a float equipped with a GPS unit. We also present a result of numerical study in which a result from finite element analysis of flow is applied to the momentum equation of the float to simulate its motion