scholarly journals Determining the Service Life Cycle of Computers

2022 ◽  
Author(s):  
THEODORE MODIS
Keyword(s):  
Life Cycle ◽  
Service Life ◽  
Diffusion Equation ◽  
Digital Equipment Corporation ◽  
Long Tail ◽  
Service Life Cycle ◽  
Digital Equipment

The logistic diffusion equation is modified in order to take into account the long tail seen in revenues from servicing computer products. The model is applied to computers of DEC (Digital equipment Corporation.)

Addressing Highly Dynamic Changes in Service-Oriented Systems

2013 ◽  
pp. 33-46 ◽  
Author(s):  
Andreas Metzger ◽  
Elisabetta Di Nitto
Keyword(s):  
Life Cycle ◽  
Service Life ◽  
Historical Development ◽  
Software Systems ◽  
Life Cycle Model ◽  
Service Oriented ◽  
Reference Service ◽  
Self Adaptation ◽  
Service Life Cycle ◽  
Oriented System

This chapter sets out to introduce relevant foundations concerning evolution and adaptation of service-oriented systems. It starts by sketching the historical development of software systems from monolithic and mostly static applications to highly-dynamic, service-oriented systems. Then, it provides an overview and more thorough explanation of the various kinds of changes that may need to be faced by service-oriented systems. To understand how such changes could be addressed, the chapter introduces a reference service life-cycle model which distinguishes between evolution, viz. the manual modification of the specification and implementation of the system during design-time, and (self-)adaptation, viz. the autonomous modification of a service-oriented system during operation. Based on the discussion of the key activities prescribed by that life-cycle, the chapter elaborates on the need for agility in both adaptation and evolution of service-oriented systems.

Secure Element

2017 ◽  
pp. 134-165
Keyword(s):  
Life Cycle ◽  
Service Life ◽  
Mobile Phones ◽  
Mobile Device ◽  
Service Provider ◽  
Sensitive Data ◽  
Mobile Operator ◽  
Execution Environment ◽  
Service Life Cycle ◽  
Secure Element

NFC enabled mobile phones are equipped with SE combined with NFC infrastructure like readers and POS terminals. The actors in the NFC infrastructure are the pre requisites but not sufficient for the use of NFC payments. There has to be a secure way to download, install, personalize, upgrade and delete an application in SE without the need to go to the service provider or mobile operator stores. TSM solution provide means of managing the NFC service life cycle OTA by using built upon and emphasizes the role an importance in NFC ecosystem. Mobile device needs to have a trusted Execution environment a place where sensitive data can be stored in secure fashion. It is a piece of hardware called as SE.

Trends and Research Issues in SOA Validation

2012 ◽  
pp. 98-115 ◽  
Author(s):  
Antonia Bertolino ◽  
Guglielmo De Angelis ◽  
Antonino Sabetta ◽  
Andrea Polini
Keyword(s):  
Life Cycle ◽  
Service Life ◽  
Service Oriented Architecture ◽  
Life Cycle Model ◽  
Research Issues ◽  
Software Applications ◽  
Service Oriented ◽  
On Line ◽  
Service Life Cycle ◽  
Dynamic Services

Service Oriented Architecture (SOA) is changing the way in which software applications are designed, deployed and maintained. A service-oriented application consists of the runtime composition of autonomous services that are typically owned and controlled by different organizations. This decentralization impacts on the dependability of applications that consist of dynamic services agglomerates, and challenges their validation. Different techniques can be used or combined for the verification of dependability aspects, spanning over traditional off-line testing approaches, monitoring, and on-line testing. In this chapter we discuss issues and opportunities of SOA validation, we identify three different stages for validation along the service life-cycle model, and we overview some proposed research approaches and tools. The emphasis is on on-line testing, which to us is the most peculiar stage in the SOA validation process. Finally, we claim that on-line testing is only possible within an agreed governance framework.

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