Katsuya Ide

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This review presents a general theory of financial crashes and of stock market instabilities that his co-workers and the author have developed over the past seven years. We start by discussing the limitation of standard analyses for characterizing how crashes are special. The study of the frequency distribution of drawdowns, or runs of successive losses(More)
The need for uniied notation in atmospheric and oceanic data assimilation arises from the eld's rapid theoretical expansion and the desire to translate it into practical applications. Self-consistent notation is proposed that bridges sequential and variational methods, on the one hand, and operational usage, on the other. Over various other mottoes for this(More)
In this study, we target the Classroom lectures to proceed by using the paper, such as notes, and handouts as a learning resource. Currently, it is common to use paper as a lecture material. The paper has the advantage of write freely. However, management is difficult as the number of students increases. Instead, we have focused on the tablet as a device(More)
The need for uniied notation in atmospheric and oceanic data assimilation arises from the eld's rapid theoretical expansion and the desire to translate it into practical applications. Self-consistent notation is proposed that bridges sequential and variational methods, on the one hand, and operational usage, on the other. Over various other mottoes for this(More)
Validation is often defined as the process of determining the degree to which a model is an accurate representation of the real world from the perspective of its intended uses. Validation is crucial as industries and governments depend increasingly on predictions by computer models to justify their decisions. We propose to formulate the validation of a(More)
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