Nowadays, most telecommunication services adhere to the Service Function Chain (SFC) paradigm, where network functions are implemented via software. In particular, container virtualization is becoming a popular approach deploy and enable resource slicing among several tenants. The resulting infrastructure complex system composed by huge amount of containers implementing different SFC functional...

In this paper we investigate the effect of three time-triggered system rejuvenation policies on service availability using a queuing model. The model is formulated as an extended stochastic Petri net using a variety of distributions for times between state changes. We define a metric for steady-state service availability and derive how it can be estimated from the models. We further analyze tim...

BACKGROUND The Israel Defense Forces implemented a pilot teledermatology service in primary clinics. OBJECTIVES To assess user satisfaction and clinical short-term effectiveness of a computerized store and forward teledermatology service in urban and rural units. METHODS A multi-center prospective uncontrolled cohort pilot trial was conducted for a period of 6 months. Primary care physician...

The Information Technology Infrastructure Library (ITIL) supports best practices, reengineering activities and IT service support processes. ITIL framework only provides recommendations, and companies need to utilize this framework to improve their IT service support processes and establish best practices. This study provides a methodology on how to apply the ITIL framework for evaluating the I...

Findings from an urban community optometry clinic in a poor area of Johannesburg, South Africa (SA), highlighted a high level of undiagnosed need, raising questions concerning access to and availability of eye-care services in SA. It is imperative that we understand vision as a requisite for poverty alleviation, and the need for a public health approach to service delivery.

The Service Availability Forum (SAF) defines a set of middleware services to support and enable high availability in a standardized manner. The Availability Management Framework (AMF) is the service in charge of managing the high availability of the services provided by an application under its control. In order to do so, the AMF service requires a configuration of the application, referred to ...

The paper presents the implementation and analysis of a servicebased reconfigurable High Availability infrastructure of cluster system for Grid. Based on service notion, the High Availability infrastructure is constructed for mission critical applications on Grid. The application high availability service is responsible for registered applications’ high availability. The Service Manager is in c...