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Dive into the research topics where Youji Kohda is active.

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Featured researches published by Youji Kohda.


international world wide web conferences | 1996

Ubiquitous advertising on the WWW: merging advertisement on the browser

Youji Kohda; Susumu Endo

Abstract We propose a new advertising framework on the WWW. Some popular WWW sites now provide advertising space in their Web pages. However the actual effectiveness of the advertising is questionable. In our advertising framework, an advertising agent is placed between advertisers and users. The agents business is to deliver advertisements to users who wish to see advertisements on their Web browser. Users will see a variety of advertisements at the sites they visit, even if the sites have no advertisements on the Web servers. This will make the advertising business on the WWW really ubiquitous.


international conference on parallel and distributed systems | 1996

Info-Plaza: A social information filtering system for the World-Wide Web

Shinichi Hiraiwa; Youji Kohda

We have prototyped a social information filtering system based on personal interests. The system is called Info-Plaza and is accessed via the World-Wide Web. Info-Plaza helps people to get new URLs which likely point to interesting web pages. Info-Plaza is a client-server system, which consists of XPlaza and Plaza-Server. XPlaza is a GUI-editor to create and arrange URL-Maps. The URL-Maps are used to register interesting web pages with the server. Plaza-Server has a database of URL-Maps collected from many users. It receives a URL-Map from a user, makes a new URL-Map based on similarities between the URL-Map, and the database entries, and then returns the new URL-Map, to the user. Thus users can exchange interesting URLs through Plaza-Server. Users are expected to edit the returned URL-Map, leaving useful URLs and removing unnecessary URLs. After repeating this process several times, the user will have a URL-Map that contains many links to interesting sites.


virtual reality modeling language symposium | 1997

SpaceFusion : a multi-server architecture for shared virtual environments

Hiroyasu Sugano; Koji Otani; Haruyasu Ueda; Shinichi Hiraiwa; Susumu Endo; Youji Kohda

A louver assembly adapted to be mounted to the rear window assembly of an automotive vehicle having a pair of integrally formed, one piece end cap unit and a plurality of elongated channel members, the end cap unit having a plurality of identical right hand end caps and a plurality of similar but reverse formed left hand end caps, a detent structure for locating and locking the channel members in alignment with the associated one of the end caps with resilient bias means for enhancing the lock and minimizing noise, the channel member being of a preselected length to connect right hand and left hand end caps in a predetermined spaced relationship whereby the louver assembly will be of the desired width to fit the rear window assembly, the end cap units being of a preselected length to provide a selected number of end caps whereby the louver assembly will be of the desired length to fit the rear window assembly, the end cap units being generally flexible between adjacent end caps whereby the end cap units can fit the vertical sweep the rear window, the channel members formed to provide a horizontal sweep, the end caps having tongue members adapted to be received within the associated ends of the channel members and being tapered to permit acceptance of the channel member ends over a wide range of angles while still providing support, guide means operative between the tongues of the end caps and the channel members to guide the same into engagement and including a blocking structure to preclude assembly of the channel members onto the tongues with the sweep in the wrong direction.


congress on evolutionary computation | 2007

Issues of Service Innovation and Its Model

Fumihiro Maruyama; Youji Kohda; Tsuneo Katsuyama

This paper addresses service innovation. First, issues characteristic of services are studied from multiple perspectives. Then we present a model for service innovation, which is a plan-do-check-act cycle to improve services by making use of technologies. We take a close look at the model with a case study.


KICSS | 2016

A Method for Opinion Mining of Coffee Service Quality and Customer Value by Mining Twitter

Shu Takahashi; Ayumu Sugiyama; Youji Kohda

In this work, we focus on customer value of Japanese coffee service by analyzing the huge tweet data set. We suggest the quantitative evaluation method of customer value by using the morphological analysis of the tweets and generated value dictionary. Our suggested methodology can be applied to any service and product to improve the commoditization problem from the viewpoint of service science.


hawaii international conference on system sciences | 2017

Toward a Model of Wisdom Determinants in the Auditing Profession

Loan Nguyen; Youji Kohda

Auditing is a complex process posing great challenges because auditors often deal with complicated circumstances that they may have not experienced before or for which their knowledge may be irrelevant or inadequate. In auditing, although wisdom is crucial, it has yet to be defined explicitly. This study discusses the concept of wisdom and proposes a theoretical framework to describe three major virtues of wisdom in the auditing profession. The findings from a literature review together with an empirical analysis of a case study reveal that wise decision-making in auditing is an integration of three-E virtues: epistemic (general, technical, and subspecialty knowledge), enabling (exercise of professional judgment), and ethical (moral and professional skepticism). In order to perform a highquality audit, the paper proposes the 3-E framework that explains how auditors should apply their knowledge, judgmental abilities, and ethical principles to make a wise audit decision.


International Journal of Managing Projects in Business | 2015

Emergence of common tacit knowledge in an international IT project

Miwa Nishinaka; Katsuhiro Umemoto; Youji Kohda

Purpose – The purpose of this paper is to examine knowledge processes in an international IT outsourcing project between two countries when knowledge is transferred from one country to the other due to business situations. A theoretical model is presented regarding knowledge processes in international projects which explains emergence of international common understanding as one of the solutions for knowledge-related challenges in international projects. Design/methodology/approach – The empirical study was conducted at the headquarters of a chemical company in Japan and its subsidiary in Singapore. The study employed a qualitative analysis method. Interviews were conducted in these companies and the results were analyzed according to grounded theory. Findings – The authors propose ARC Model of Knowledge Management in International IT Outsourcing Projects, which is a new theoretical model of project knowledge management in international settings, with a view of localization into knowledge processes. Inter...


hawaii international conference on system sciences | 2017

Rebuilding Evolution: A Service Science Perspective

Jim Spohrer; Abul Kalam Siddike; Youji Kohda

This paper explores a simple idea and asks a simple question: What determines the speed limit of evolutionary processes, and might there be ways to speed up those processes for certain types of systems under certain conditions? Or even more simply, how rapidly can complex systems be rebuilt? To begin with, the universe can be viewed as an evolving ecology of entities. Entities correspond to types of systems from atoms in stars to organisms on Earth to ideas in the heads of people. Service science is the study of the evolving ecology of service system entities, complex socio-technical systems with rights and responsibilities – such as people, businesses, and nations. We can only scratch the surface in this paper, but our explorations suggest this is an important research question and direction, especially as we enter the cognitive era of smart and wise service systems. For example, it takes a child multiple years of experience to learn language and basic social interactions skills, but could machine learning algorithms with the proper data sets learn those capabilities in a fraction of the time?


International Conference on Applied Human Factors and Ergonomics | 2017

Wisdom Service Systems: Harmonious Interactions Between People and Machine

Md. Abul Kalam Siddike; Kazuo Iwano; Kazuyoshi Hidaka; Youji Kohda; Jim Spohrer

Wisdom is the highest-level decision-making performance, acquired by gaining experience that can be applied in complex, conflict situations as well as interacting with other wise people. We conceptualize wisdom service systems as socio-technical systems in which people use cognitive mediators (smart machines that know people in some ways better than they know themselves and provide a type of weak immortality for people) to augment interaction and decision-making capabilities in a kind of Reality 2.0. Someday cognitive mediators may provide scaffolding and offer options (appropriate recommendations) associated with a situation to help people make wiser decisions to manage complex situations more wisely, overcoming some of the problems of bounded-rationality and becoming more T-shaped in their skillsets and mindsets to communicate better with people from other disciplines, systems, or cultural depth areas. To introduce this concept, we develop a framework for wisdom service systems showing how appropriately designed cognitive mediators may eventually harmoniously interact with people and machines, adapt to evolving situations and contexts, as well as provide prioritized recommendations. The digital cognitive systems framework provides a way to understand the progression: tool, assistant, collaborator, coach, mediator, and sheds light on one interpretation DIKUW: data, information, knowledge, understanding, and wisdom. Finally, this paper concludes with future research directions to help realize this vision.


international conference on advanced applied informatics | 2014

Transformation of Public Libraries: Co-creation of Values at Multipurpose Community Learning Centers

Md. Abul Kalam Siddike; Katsuhiro Umemoto; Youji Kohda

Public libraries all over the world are transforming themselves into more community centered for building community. In this paper, first of all, we describe the transformation of public libraries into multipurpose community learning centers (MCLCs). Secondly, we design a value co-creation process model at MCLCs. Thirdly, we examine the co-created values at MCLCs. Finally, we conclude the paper indicating the future of public libraries. Our analysis shows that economic values as well as social values are co-created at MCLCs. In addition, it is a great opportunity to broaden the view of value co-creation in service science.

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Md. Abul Kalam Siddike

Japan Advanced Institute of Science and Technology

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Amna Javed

Japan Advanced Institute of Science and Technology

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Hisashi Masuda

Japan Advanced Institute of Science and Technology

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Katsuhiro Umemoto

Japan Advanced Institute of Science and Technology

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