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

Although most interactive systems seem to facilitate user work, our system—an interactive examination system—increased the time required by as much as 100%. To explore this phenomenon we videotaped four students taking an exam interactively and on paper. Analysis showed the extra time went to system overhead, think time and trouble understanding what to do. We were able to explain the latter two categories as the result of four varieties of “uncertainty”. Evidence included changes in review behavior and working habits, hesitation before leaving a page and the “context switch” time required to recognize even a familiar image. With subsequent improvements the increased time has been largely eliminated.

Why an Examination Was Slower On-Line than On Paper.

This paper discusses several hypermedia facilities built on top of the An- drew Toolkit (ATK) and their use in ATK applications. As a general-purpose, multimedia, application-development system, ATK permits many kinds of links, references and other connections to be made within pieces of content and between pieces of content, regardless of the content's medium. We argue that starting with a multimedia architecture facil- itates the construction of all forms of hypermedia. Four specific hypermedia facilities implemented with ATK are discussed: an integrated web and indexing system (Help), a simple multimedia link facility (Link), a cross reference (Textref) capability, and a link- supporting embedded object language (Ness). As a toolkit, ATK is used to build other applications which inherit ATK's hypermedia facilities. Therefore we consider briefly the way that hypermedia facilities are used in conventional applications, such as mall systems.

/pdf/building-hypertext-on-a-multimedia-toolkit-an-overview-of-2u4i1zum3x.pdf

Building hypertext on a multimedia toolkit: an overview of Andrew Toolkit hypermedia facilities

Diverse visual languages have been proposed, implemented, and published; but each is demonstrated on problems chosen by its authors. To make a fair comparison, the 1994 Visual Languages Comparison project proposed a set of three problems and solicited solutions to these problems in various visual languages. Submissions arrived for one graphic rewriting system-ChemTrains-and four data flow languages-LabVIEW, Prograph, Show and Tell, and VisaVis. >

Wilfred J. Hansen

Papers

Why an Examination Was Slower On-Line than On Paper.

Building hypertext on a multimedia toolkit: an overview of Andrew Toolkit hypermedia facilities

The 1994 Visual Languages Comparison

Building Hypertext on a Multimedia Toolkit: An Overview of Andrew Toolkit Hypermedia Facilities.

Allocation of user-interface resources in the Andrew Toolkit