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.

The Internet of Things is a new structure of internetworking, on which things in our daily life are connected to the Internet to collect and exchange data. This chapter introduces the current status of the Internet of Things that includes some examples of applications, standardization trends, and basic technologies. Some security risks are discussed. The chapter also proposes a software framework for development of the Internet of Things, and discusses the importance of timer accuracy under periodic processing.

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.