The progress of information and communication technologies (ICT) has promoted the development of healthcare which has enabled the exchange of resources and services between organizations. Organizations want to integrate mobile devices into their hospital information systems (HIS) due to the convenience to employees who are then able to perform specific healthcare processes from any location. The collection and merage of healthcare data from discrete mobile devices are worth exploring possible ways for further use, especially in remote districts without public data network (PDN) to connect the HIS. In this study, we propose an optimal mobile service which automatically synchronizes the telecare file resources among discrete mobile devices. The proposed service enforces some technical methods. The role-based access control model defines the telecare file resources accessing mechanism; the symmetric data encryption method protects telecare file resources transmitted over a mobile peer-to-peer network. The multi-criteria decision analysis method, ELECTRE (Elimination Et Choice Translating Reality), evaluates multiple criteria of the candidates' mobile devices to determine a ranking order. This optimizes the synchronization of telecare file resources among discrete mobile devices. A prototype system is implemented to examine the proposed mobile service. The results of the experiment show that the proposed mobile service can automatically and effectively synchronize telecare file resources among discrete mobile devices. The contribution of this experiment is to provide an optimal mobile service that enhances the security of telecare file resource synchronization and strengthens an organization's mobility.

The information technology industry designs various e-services based on the fast delivery, powerful computing and large storage capacity of cloud computing systems. Specifically, the service provider develops e-service markets within a cloud computing environment with which to provide the e-services. The use of information technology, insofar as helping people obtain reasonable e-service, provides challenges to innovative service providers. In this work, we propose an adaptive e-service for linking users and the cloud services. Our work is based on user profile, specifically, on a role-based access control model with which to identify the user and assign a specific role. A user with a specific role is then authorized to access the various e-services in the cloud computing environment. Then, the utility function and multi-criteria decision analysis model are deployed to optimize the e-service selection with regard to various cloud services. Our aim is that the proposed adaptive e-service will be able to assist people in obtaining e-services in cloud environments. 

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