岡本 秀輔

This paper describes an implementation of a runtime environment for portable message-passing C programs with Message Passing Interface (MPI) library on web browsers. We have implemented core functions of the library. The runtime system runs several MPI programs without any modification. We confirm that the runtime performances of the programs are comparable to their native executions on some conditions.

This paper describes a distributed calculation scheme for scoring relationship among documents. This scheme categorizes documents by using an algorithm which calculates a score value for the relationship between a category and a word in a document. The longer calculation time becomes when increasing the number of documents. Therefore, our scheme uses multiple machines. A master node divides a document set into several subsets, and it distributes them to each calculation nodes. Using this distributed calculation makes the calculation time short, and also makes the memory usage low.

This paper describes a C++ library to build web applications. The idea is borrowed from Node.js and Express. js which are a rapid web development framework for JavaScript. Our library consists of a few header files so that it can be available by including them into a source code. The API uses some C++ 14 features, especially 'auto' type, and the program which uses this library becomes concise and clear. In this paper, the design policy, several sample programs and its implementation are presented.

In an university, students take an oral exam to check the understanding level. Especially, in a programming class, a student writes a program source code to solve a practice. Then, the student takes an oral exam. To support the ordering of the oral exam and the checking source code, this paper proposes a reservation system for oral exam. A student uploads source code files to the system. Then, the student is registered to a queue of the oral exam. The student can check the own turn because the own student ID is highlighted. A teacher checks the source code files and asks some questions to the student. Finally, the teacher grades the student and registers the grade to the system.