The book is an introduction to the idea of design patterns in software engineering, and a catalog of twenty-three common patterns. The nice thing is, most experienced OOP designers will find out they've known about patterns all along. It's just that they've never considered them as such, or tried to centralize the idea behind a given pattern so that it will be easily reusable.

Design Patterns: Elements of Reusable Object-Oriented Software

This book offers a modern approach to computational geo- metry, an area thatstudies the computational complexity of geometric problems. Combinatorial investigations play an important role in this study.

Algorithms in Combinatorial Geometry

羟氨苄青霉素引起大疱性类天疱疮样疹

An intelligent automated assistant system engages with the user in an integrated, conversational manner using natural language dialog, and invokes external services when appropriate to obtain information or perform various actions. The system can be implemented using any of a number of different platforms, such as the web, email, smartphone, and the like, or any combination thereof. In one embodiment, the system is based on sets of interrelated domains and tasks, and employs additional functionally powered by external services with which the system can interact.

Intelligent Automated Assistant

/pdf/interacting-with-paper-on-the-digitaldesk-3rbn5qqi0c.pdf

Interacting with paper on the DigitalDesk

The Andrew Toolkit - An Overview.

The 'feel' of an interactive system can be compared to the impressions generated by a piece of music. Both can only be experienced over a period of time. With either, the user must abstract the structure of the system from a sequence of details. Each may have a quality of 'naturalness' because successive actions follow a logically self-consistent pattern. Finally, a good composer can write a new pattern which will seem, after a few listenings, to be so natural the observer wonders why it was never done before.

User engineering principles for interactive systems

: Spiral development is a family of software development processes characterized by repeatedly iterating a set of elemental development processes and managing risk so it is actively being reduced. This paper characterizes spiral development by enumerating a few "invariant" properties that any such process must exhibit. For each, a set of "variants" is also presented, demonstrating a range of process definitions in the spiral development family. Each invariant excludes one or more "hazardous spiral look-alike" models, which are also outlined. This report also shows how the spiral model can be used for a more cost-effective incremental commitment of funds, via an analogy of the spiral model to stud poker. An important and relatively recent innovation to the spiral model has been the introduction of anchor point milestones. The latter part of the paper describes and discusses these.

/pdf/spiral-development-experience-principles-and-refinements-4ek6k1ir3g.pdf

Spiral Development: Experience, Principles, and Refinements

Several factors can influence the behavior of users as they read and write with computers. Recent research indicates that both quality and quantity depend upon page size, legibility, responsiveness and tangibility.

Reading and writing with computers: a framework for explaining differences in performance

http://onestoptesting.com/testing-download/download/using the spiral model for evolutionary acquisition.pdf

Wilfred J. Hansen

Papers

The Andrew Toolkit - An Overview.

User engineering principles for interactive systems

Spiral Development: Experience, Principles, and Refinements

Reading and writing with computers: a framework for explaining differences in performance

Understanding the Spiral Model as a Tool for Evolutionary Acquisition