High dimensional asymptotics for the naive Hotelling T2 statistic in pattern recognition

Abstract

This paper examines the high dimensional asymptotics of the naive Hotelling T² statistic. Naive Bayes has been utilized in high dimensional pattern recognition as a method to avoid singularities in the estimated covariance matrix. The naive Hotelling T² statistic, which is equivalent to the estimator of the naive canonical correlation, is a statistically important quantity in naive Bayes and its high dimensional behavior has been studied under several conditions. In this paper, asymptotic normality of the naive Hotelling T² statistic under a high dimension low sample size setting is developed using the central limit theorem of a martingale difference sequence.     

Strategic Community Management with Customers: Case Study on Innovation Using IT and Multimedia Technology in Education, Medical and Welfare Fields

This paper discusses the management processes for forming strategic communities by means of strategic partnerships between businesses and customers, for introducing into the Strategic communities the knowledge of customers with a high degree of learning experience with respect to the products and services provided by the businesses, thereby creating new business models and at the same time extending the results of the strategic communities to many other associated customers. Innovations in the fields of education, medicine and welfare utilizing IT and multimedia technology over the past four years are taken as examples in this case study. Here a strategic community of business and innovative customers has established a new business model in the fields of education, medicine and welfare on the basis of IT and multimedia technology. The results of the activities of the strategic community of innovative customers were then extended to many other related customers in a chain of community creation, and the new systems were widely proliferated throughout Japan. This revised version was published online in July 2006 with corrections to the Cover Date.     

Has Livability of Japan Gotten Better for 1956–1990?: a Dea Approach

This paper presents an approach for time-series livability assessment using DEA (Data Envelopment Analysis), a mathematical programming technique for measuring the relative efficiency of DMUs (Decision Making Units) with multiple inputs and multiple outputs. Regarding each year as a separate DMU in DEA, and replacing the inputs and the outputs with negative and positive social indicators respectively, we evaluate Japan's livability for the period 1956–1990. Results of the analysis using eight social indicators identify 20 DEA livable years out of the 35 and find eight best-balanced years. It is concluded that DEA, which enables non-uniform, multi-dimensional and relative evaluation, can be a valuable analytic tool in quality-of-life research as well. This revised version was published online in August 2006 with corrections to the Cover Date.     

Business Innovation through Customer Value Creation-Type Businesses

In the last few years, Japan has seen rapid growth in the multipoint connection service market, which is associated with multimedia videoconferencing systems. Behind this trend was the birth and explosive growth of the multipoint video communications market, which was initiated by NTT, Japan's largest telecommunications carrier, in alliance with a joint venture business (NTT Phoenix Network Communication Inc.: hereafter, NTT Phoenix) comprised of heterogeneous U.S.-Japan joint businesses. This article takes up the case of the world's largest multi-point connection venture business, and considers how an NTT Phoenix's customer value creation-type business created a new video network service market in Japan.     

Transforming an Old Economy Company Through Strategic Communities

This paper describes how established companies can create strategic business communities in order to usher in innovation. The paper focuses on the case of NTT DoCoMo, Japan’s largest mobile telecommunications carrier, which has utilised strategic community management principles in its efforts to cultivate and expand the mobile Internet market in Japan. In doing so, new markets were created, in turn leading to further opportunities for NTT DoCoMo. The paper distinguishes between strategic communities and other organisational forms such as projects and communities of practice and discusses the advantages of each. It concludes with the assertion that strategic community management is an effective methodology aimed at strategic innovation by major enterprises.