Authorship：Lead author   Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1108/IJWIS-10-2013-0025

Authorship：Lead author   Language：English   Publishing type：Research paper (scientific journal)  

Event date： 2024.7

Language：English   Presentation type：Poster presentation  

Country：Japan  

DOI： 10.1109/ITC-CSCC62988.2024.10628417

Event date： 2024.6

Language：Japanese  

Event date： 2024.5

Language：Japanese   Presentation type：Oral presentation (general)  

Country：Japan  

Event date： 2023.9

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：宇都宮   Country：Japan  

Event date： 2023.9

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：宇都宮   Country：Japan  

Event date： 2023.9

Language：Japanese  

Country：Other  

Event date： 2023.8

Language：Japanese   Presentation type：Oral presentation (general)  

Country：Japan  

Event date： 2023.7

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：オンライン   Country：Japan  

Event date： 2023.7

Language：English   Presentation type：Oral presentation (general)  

Venue：Athens   Country：Greece  

Event date： 2023.6

Language：Japanese  

Country：Other  

Event date： 2023.3

Language：Japanese  

Country：Other  

Event date： 2022.12

Language：Japanese  

Country：Other  

Event date： 2022.10

Language：Japanese  

Country：Other  

Event date： 2022.9

Language：Japanese  

Country：Other  

Event date： 2022.9

Language：English  

Country：Other  

Event date： 2022.9

Language：English  

Country：Other  

Event date： 2022.8

Language：Japanese  

Country：Other  

Event date： 2022.8

Language：Japanese  

Country：Other  

Event date： 2022.7

Language：English  

Country：Other  

Event date： 2022.3

Language：Japanese  

Country：Other  

Event date： 2022.2

Language：English  

Country：Other  

Event date： 2021.12

Language：English  

Country：Other  

Event date： 2021.12

Language：Japanese  

Country：Other  

Event date： 2021.12

Language：Japanese  

Country：Other  

Event date： 2021.9

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：オンライン   Country：Japan  

Event date： 2021.8

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：オンライン   Country：Japan  

Event date： 2021.8

Language：Japanese  

Venue：熊本   Country：Japan  

Event date： 2021.7

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：オンライン   Country：Japan  

Event date： 2021.6

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：オンライン   Country：Japan  

Event date： 2021.6

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：オンライン   Country：Japan  

Event date： 2021.5

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：オンライン   Country：Japan  

Event date： 2020.12

Language：English  

Country：Other  

Stronger Targeted Poisoning Attacks Against Malware Detection

Event date： 2020.7

Language：English  

Country：Other  

A Cloud VM Migration Control Mechanism using Blockchain

Event date： 2019.10

Language：Others  

Country：Other  

Is Sticking to Highly Regular Sleep/Wake Timing Good for Health? -- A quantitative study of associations between sleep/wake habit, objective sleep-related parameters, and subjective sleep quality --

Event date： 2019.8

Language：Others  

Country：Other  

On Embedding Backdoor in Malware Detectors Using Machine Learning

Event date： 2019.8

Language：Others  

Country：Other  

Policy Management Technique Using Blockchain for Cloud VM Migration

Event date： 2019.3

Language：Others  

Country：Other  

Event date： 2019.1

Language：Others  

Country：Other  

Event date： 2018.11

Language：Others  

Country：Other  

Event date： 2018.9

Language：English  

Country：Other  

Design of an AR-supported System for Skill Training

Event date： 2018.7

Language：English  

Country：Other  

Toward a Secure VM Migration Control Mechanism using Blockchain Technique for Cloud Computing Environment

Event date： 2018.3

Language：Japanese  

Country：Other  

Event date： 2017.8

Language：English  

Country：Other  

Verification of Data Collection Methods for Live Migration Protection Mechanism

Event date： 2017.6

Language：English  

Country：Other  

This article presents a data audit system, which confirms that proper use of data is performed on the iKaaS platform (intelligent Knowledge as a Service) platform. The proposed data audit system can alleviate ambiguous anxiety of data owner about unauthorized use by providing measures to understand that illegal use of data cannot occur. This achievement is expected to support the construction of the data use environment and encourage the discovery of novel knowledge.

Event date： 2017.3

Language：Japanese  

Country：Japan  

遠隔操作ロボットと全方位カメラを用いた遠隔臨場感システムに関する一考察

Event date： 2017

Language：English  

In this paper, we propose a data protection mechanism for live migration process. The proposed data protection mechanism verifies whether it is permitted to copy the data of from the migration source application to the migration destination based on the contents of the regulations concerning the use of the data issued by the organization and the country at the time of during the live migration procedures. This mechanism performs live migration only when copying is permitted. By applying this mechanism, it is possible to use appropriate data while protecting privacy during the live migration process. Detailed explanation and implementation evaluation of the data protection mechanism were carried out. As a result, we observed that the mechanism did not exhibit adverse effects on the live migration process.

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Event date： 2016.11

Language：English  

Country：Japan  

This article presents a data audit system, which confirms that proper use of data is performed on the iKaaS platform (intelligent Knowledge as a Service) platform. The proposed data audit system can alleviate ambiguous anxiety of data owner about unauthorized use by providing measures to understand that illegal use of data cannot occur. This achievement is expected to support the construction of the data use environment and encourage the discovery of novel knowledge.

Event date： 2016.9

Language：Japanese  

Country：Japan  

Proposal of An Environment Adaptive Architecture for Flexible IoT

Event date： 2016.9

Language：Japanese  

Country：Japan  

Event date： 2016.9

Language：Japanese  

Country：Other  

Proposal of An Environment Adaptive Architecture for Flexible IoT

Event date： 2016.3

Language：Japanese  

Country：Japan  

Event date： 2016

Language：English  

When an undesirable situation occurs in a hybrid cloud computing environment, vital issues arise when searching for IaaS cloud services that best-match to the user's requirements. This includes the different descriptions/naming of IaaS cloud services, i.e., CPU, memory, and others, adapted by different companies making it difficult and ambiguous to select the best-match cloud services. Initially, we considered utilizing ontology technology and typical clustering methods to narrow down the selection process. In this paper, we proposed an improved ontology clustering scheme and describe the methodology. Preliminary experiments shows promising results showing a fair gathering of related elements in the cluster and the speedup of processing depicting a viable resiliency support for hybrid cloud.

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Event date： 2016

Language：English  

Hybrid cloud computing paradigm is gaining wide acceptance to multi-faceted IT organizations to meet the users' different sets of requirements for different types of applications. However, this can also create an array of issues, such as complex architectures, security, service provisioning in cases of resources failures/disaster, etc. To mitigate the impact and minimize trade-offs, we proposed an ontology-based framework to provide support for a resiliency mechanism in the hybrid cloud. We adopted ontology technology to provide a unified representations of cloud service names to facilitate the discovery and selection of the best-match cloud service in cases of failures. As types of cloud services evolve over time, we adopted ontology clustering to speed up the search process. Preliminary experiment results provided promising results.

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Event date： 2016

Language：English  

This paper presents a data protection mechanism for a live migration process. The proposed data protection mechanism verifies whether it is permissible for the data of an application of a movement source to be duplicated to a movement destination based on the contents of regulations related to data use issued by organizations and countries at the start of a live migration process. The mechanism executes live migration only when duplication is permitted. This mechanism makes appropriate data use possible while protecting privacy during a live migration process.

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Event date： 2015.10

Language：Japanese  

Country：Japan  

Event date： 2015

Language：English  

The continuing advances in cloud computing technology, infrastructures, applications, and hybrid cloud have led to provide solutions to challenges in big data and high performance computing applications. The increasing number of cloud service providers offering cloud services with non-uniform descriptions has made it time consuming to find the best match service with the user's requirements.
This paper is an effort to speed up the service discovery and selection of IaaS cloud services which is, best-match" to the user requirements. Preliminary experiments provided promising results which demonstrates the viability of the approach.

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Event date： 2015

Language：English  

This paper investigates into IaaS service provisioning in hybrid cloud which comprises private and public clouds. It proposes a hybrid cloud framework in order to improve reliability and availability of IaaS services by taking into account alternative services which are available through public clouds. However, provisioning of alternative services in hybrid cloud involves complex processing, intelligent decision making and reliability and consistency issues. In the proposed framework, we develop an agent-based system using cloud ontology in order to identify and rank alternative cloud services which users can acquire in the event of failures or unavailability of desired services. The proposed framework also exploits transactional techniques in order to ensure the reliability and consistency of the service acquisition process. The proposed framework is evaluated through various experiments which show that it improves service availability and reliability in hybrid cloud.

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Event date： 2014

Language：English  

The cloud computing paradigm with its pay-as-youuse business model is envisioned to provide immense benefits and promising returns. Hybrid cloud computing deployment model offers a viable solution of in-house private cloud with limited or unavailable resources on hand to meet the application requirements or at runtime. However, due to the large-scale, widely distributed and complexity of the underlying infrastructure, the cloud system is vulnerable to failures which are of great concern to users which may jeopardize the reliability and availability of cloud services. This paper describes our work-in-progress on using ontology and agents to provide support to achieve resiliency in hybrid cloud computing. Preliminary experimental evaluation provided promising results and insights on some important issues for future research directions.

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Event date： 2013

Language：English  

Hybrid cloud has been considered a viable option to address the unavailability and/or limited resources of an in-house private cloud as per user's requirements or at runtime. The approach is poised to highly benefit the user in terms of procuring the required resources and/or the time element. With many companies offering different features of public cloud services, even if such service is of the same type, the quest to discover and select the suitable public cloud service provider is of utmost importance. This paper proposed an agent-based support system to discover the most suitable public cloud service provider based on the user's requirements. Agents and ontologies were used to implement the proposed model. Verification test results demonstrates the viability and usefulness of the system.

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Event date： 2012

Language：English  

Semantic grid computing provides a shared computing environment with geographically distributed resources. These resources status changes dynamically and the type of applications to be executed also changes in time. In this paper, we proposed an adaptive mechanism in the semantic grid environment to reduce the efforts to configure and enact application workflows. Some applications were used to describe the proposed mechanism and as a proof-of-concept. Preliminary results provide insights on workflow verification issues and applications workflow. © 2012 IEEE.

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Event date： 2012

Language：English  

Building an ontology resource network using grid computing is one method to exploit the sparsely distributed ontology resources. Grid computing technology provides merit on security issues and ease of controlling the resources. However, problems on resource discovery and the effectiveness in managing and provisioning the various scattered grid resources exist. We addressed these problems with the construction of a semantic grid service which automatically provides the optimal required grid resources, and the adaption of the notion of Virtual Organization (VO). The semantic grid service consists of various VOs, and the sub-ontology extraction and tailoring application was used as a proof-of-concept. The processing of the application was analyzed in order to verify the workability of the system.

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Event date： 2011.10

Language：Japanese  

Country：Japan  

Event date： 2011

Language：English  

A sub-ontology extracted from its base ontology data contains only the concepts and relationships pertaining to the information required by the user. Sub-ontology extraction and sub-ontology tailoring are then viewed as possible solutions to efficiently utilize large-scale ontology data sparsely distributed on a Semantic Grid environment. This shall contribute to reduce the communication overhead in transporting the ontology data, increase the processing performance, improve the reliability in aggregating the required ontology/sub-ontology, and improve the tailoring process of sub-ontology reuse. This paper discussed preliminary experiments as a showcase to illustrate sub ontology extraction and tailoring on a prototype Semantic Grid environment. Functional analysis and discussion of the results are described. © 2011 IEEE.

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Event date： 2010.8

Language：Japanese  

Country：Japan  

Event date： 2010.7

Language：English  

Country：Japan  

A Workflow Orchestration and Reuse Service for the Semantic Grid

Event date： 2010.3

Language：English  

Country：Japan  

On a Prototype Environment for Sub-ontology Extraction in Semantic Grid

Event date： 2010.1

Language：Japanese  

Country：Japan  

Event date： 2010

Language：English  

Ontology databases in Semantic Grid can grow very large making it more complex and difficult to manage. Subontology extraction in compliance with the user requirements paves the way for sub-ontology reuse in sub-ontology/ontology tailoring. As new developments and discoveries are unleashed, or when sub-ontology will be reused, the need to update the extracted sub-ontology is deemed necessary. In this paper, we proposed a sub-ontology update mechanism and verify its functionality and performance. Preliminary results demonstrate the viability of the proposed mechanism. © 2010 IEEE.

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Event date： 2010

Language：English  

Sub-ontology extraction provides a solution in dealing with large ontology. As time progresses, new discoveries and new ontology emerges making the ontology data much larger. Updating the sub-extracted ontology becomes a crucial task. Updating extracted sub-ontology can be done by performing the whole extraction process repeatedly from the base ontology. In contrast, our proposed approach is to develop an incremental update mechanism which can minimize the large communication and processing overhead in the former method. In this paper, we construct and describe a grid application service framework for updating extracted sub-ontology using the incremental update mechanism. The service can be accessed through a web portal. Functional verification and analysis provides viability of the framework. Copyright 2010 ACM.

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Event date： 2009.9

Language：Japanese  

Country：Japan  

Event date： 2009.3

Language：Japanese  

Country：Japan  

Event date： 2009

Language：English  

Whereas, the semantic grid is considered as the uniting concept of semantic web and grid computing, and the ontology technology provide an efficient data retrieval methodology in widely distributed semantic grid resources over the Internet. As the number of semantic grid resources increase, e.g., ontology servers, the amount of data increases and managing job workflows is becoming increasingly complex. This paper proposed a validation framework for sub-ontology extraction workflows in our proposed semantic grid computing environment. We considered two ontology optimization schemes and design its workflow models using Petri Net. The workflow for each model is described and validated. Preliminary results justify the feasibilities of our proposed validation framework of the aforementioned models which can be used as building blocks to model large and efficient sub-ontology extraction workflows in a semantic grid.

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Event date： 2009

Language：English  

Sub-ontology, as the name states, is a subset of an ontology tailored for a specific domain. The main work on sub-ontology derivation was initially proposed by Wouters [1] and later extended by Flahive [2], where they proposed a number of sub-ontology extraction methods. These sub-ontology extraction methods were called sub-ontology optimization schemes. In this paper, we develop a visual view for users to adopt sub-ontology extraction methods [1,2], with a particular aim of providing users a front-end tool to perform a particular sub-ontology extraction. A full implementation and evaluation of the system are an on-going process.

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Event date： 2007.12

Language：English  

Country：Other  

An Indoor Location-Aware Mobile Navigation Service for the Handicapped and the Elderly

Event date： 2007.10

Language：Japanese  

Country：Other  

Event date： 2007.3

Language：Japanese  

Country：Other  

Type：Competition, symposium, etc. 

Type：Competition, symposium, etc. 

Type：Academic society, research group, etc. 

Type：Peer review 

Number of peer-reviewed articles in foreign language journals：0

Number of peer-reviewed articles in Japanese journals：2

Proceedings of International Conference Number of peer-reviewed papers：4

Proceedings of domestic conference Number of peer-reviewed papers：2

Type：Competition, symposium, etc. 

Type：Academic society, research group, etc. 

Type：Academic society, research group, etc. 

Type：Competition, symposium, etc. 

Type：Competition, symposium, etc. 

Type：Peer review 

Number of peer-reviewed articles in foreign language journals：0

Number of peer-reviewed articles in Japanese journals：2

Proceedings of International Conference Number of peer-reviewed papers：2

Proceedings of domestic conference Number of peer-reviewed papers：2

Type：Competition, symposium, etc. 

Type：Academic society, research group, etc. 

Type：Peer review 

Number of peer-reviewed articles in Japanese journals：2

Proceedings of International Conference Number of peer-reviewed papers：5

Proceedings of domestic conference Number of peer-reviewed papers：3

Type：Competition, symposium, etc. 

Type：Academic society, research group, etc. 

Type：Peer review 

Number of peer-reviewed articles in Japanese journals：3

Proceedings of International Conference Number of peer-reviewed papers：2

Type：Competition, symposium, etc. 

Type：Competition, symposium, etc. 

Type：Competition, symposium, etc. 

Type：Competition, symposium, etc. 

Type：Competition, symposium, etc. 

Type：Competition, symposium, etc. 

Type：Competition, symposium, etc. 

Type：Competition, symposium, etc. 

Type：Competition, symposium, etc. 

Type：Competition, symposium, etc. 

Type：Competition, symposium, etc. 

Type：Competition, symposium, etc.