Extending The Legacy

Modeling and Simulating Software Architectures

A new, quantitative architecture simulation approach to software design that circumvents costly testing cycles by modeling quality of service in early design states. Too often, software designers lack an understanding of the effect of design decisions on such quality attributes as performance and reliability. This necessitates costly trial-and-error testing cycles, delaying or complicating rollout. This book presents a new, quantitative architecture simulation approach to software design, which allows software engineers to model quality of service in early design stages. It presents the first simulator for software architectures, Palladio, and shows students and professionals how to model reusable, parametrized components and configured, deployed systems in order to analyze service attributes. The text details the key concepts of Palladio's domain-specific modeling language for software architecture quality and presents the corresponding development stage. It describes how quality information can be used to calibrate architecture models from which detailed simulation models are automatically derived for quality predictions. Readers will learn how to approach systematically questions about scalability, hardware resources, and efficiency. The text features a running example to illustrate tasks and methods as well as three case studies from industry. Each chapter ends with exercises, suggestions for further reading, and “takeaways” that summarize the key points of the chapter. The simulator can be downloaded from a companion website, which offers additional material. The book can be used in graduate courses on software architecture, quality engineering, or performance engineering. It will also be an essential resource for software architects and software engineers and for practitioners who want to apply Palladio in industrial settings.

Historic Preservation

This well-illustrated book offers an up-to-date synthesis of the field of historic preservation, cast as a social campaign concerned with the condition, treatment and use of the legacy of existing properties in the United States. Drawing on a wide range of research, experience and scholarship over the last fifty years, it allows us to re-think past and current ideas in preservation, challenging readers to explore how their own interests lie within the cognitive framework of the activities taking place with people who care. “Who” is involved is explored first, in such a way as to explore “why”, before examining “what” is deemed important. After that the questions of “when” and “how” to proceed are given attention. The major topics are introduced in an historical review through the mid-1980s, after which the broad intellectual basis and fundamental legal framework is provided. The economic shifts associated with major demographic changes are explored, in tandem with responses of the preservation community. A chapter is dedicated to the financial challenges and sources of revenue available in typical preservation projects, and another chapter focuses on the manner in which seeing, recording, and interpreting information provides the context for an appropriate vision for the future. In this regard, it is made clear that not all “green” design alternatives are preservation-sensitive. The advocacy battles during the last few decades provide a number of short stories of the ethical battles regarding below-ground and above ground historic resources, and the eighth chapter attempts to explain why religion has been long held at arm’s length in publicly-supported preservation efforts, when in fact, it holds more potential to regenerate existing sites than any governmental program.

The Acts Relating to Probate, Legacy, and Succession Duties ... With an Introduction, Copious Notes, and an Appendix of Statutes. By Alfred Hanson ... Third Edition