Pervasive Computing is a very challenging and complex domain that still lacks a comprehensive unified architecture. In this paper, we propose a reference architecture for pervasive computing that captures most, if not all, of the key challenges and provides a new architecture model that can be used in almost any business context. It provides conceptual views for the smart environment (SE), the smart object (SO), and the pervasive system (PS). We evaluated the model using a simulation prototype to predict its reliability at runtime.

The pervasive computing domain is a very challenging one and requires a robust architectural model to facilitate the production of its systems. In this paper, we explain a case study using a simulation prototype to validate our baseline architecture of a reference architecture for the pervasive computing domain. The simulation prototype was very useful in predicting the reliability and availability of the system using the baseline architecture during runtime.

One of the major problems faced by all pattern language builders, is how to manage their languages. In this rsearch work, an HCI Pattern Language Management Tool (HCI PLMT) was developed based on the ontological-approach we proposed in [1]. The HCI PLMT is an automated tool that manages the searching and browsing of patterns existing within the HCI Pattern Language that we also proposed in [1]. The PLMT manages the addition of new user interface design patterns to the language and their connection to the existing patterns. It also supports the modification of patterns and/or links existing within the pattern language, as well as the addition of new links between existing entries within the HCI Pattern Language. The HCI PLMT is evaluated to prove its validity and acceptance.

Nowadays, Internet of Things (IoT) is invading almost all sectors of life since it is based on connecting living or non-living things together through computer technology. It is responsible for connecting physical objects together through the internet. Healthcare and hospitals are one of the most important sectors that require a lot of attention to transfer their old form of documentation into SMART management systems. It is essential to analyze health data in order to increase the quality of patient's care. Egypt being a development country is starting to substitute its old governmental systems into electronic SMART technology. IoT devices produce different types of data and transfer them to the cloud computing for storage and analysis. The benefits of using IoT in collecting, transferring, and analyzing patients' data for the hospitals are attracting a lot of researchers. Therefore, the arrangement of smarter and more money saving healthcare services are becoming highly required. Security and privacy, device communication, and data collection and management are some of the challenges that face the IoT technology especially when used with hospital's data. Accordingly, a proposed reference model for making SMART hospital management system is under construction in order to achieve the best performance. The model is taking into consideration both the functional and non-functional requirements of the different participants involved in the hospital management system. International Journal of IntelligentComputing and Information Sciences https://ijicis.journals.ekb.eg/ 2 D. k. A. A. Rizk et al.

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