Trends in aircraft design

The improved performance of aircraft during the past decade has resulted in the need for new design and production techniques. Particular examples are integral construction and the use of sandwich panels. Although these processes are costly, especially when applied to titanium and steel construction, their use is likely to be necessary, at least to some extent. on many supersonic aircraft. The supersonic airliner is no exception to this and the paper discusses the design aspects of this type of aircraft which have a bearing on production problems. It is concluded that more research aimed at reducing the cost of sophisticated forms of construction is required

The teaching of aircraft design

Aircraft Design has been taught at the College of Aeronautics since 1946. The course is at postgraduate level and is of two years duration. In the first year the students are given three exercises in component design which aim to teach a logical approach and the fundamentals of the subject. During the second year each student works as a member of a team engaged in the design of a complete aircraft, which is chosen to be of a type currently being investigated by industry. The project aircraft invariably incorporates experimental features and the design work is therefore of the nature of research

A pattern-recognition theory of search in expert problem solving

Understanding how look-ahead search and pattern recognition interact is one of the important research questions in the study of expert problem-solving. This paper examines the implications of the template theory (Gobet & Simon, 1996a), a recent theory of expert memory, on the theory of problem solving in chess. Templates are "chunks" (Chase & Simon, 1973) that have evolved into more complex data structures and that possess slots allowing values to be encoded rapidly. Templates may facilitate search in three ways: (a) by allowing information to be stored into LTM rapidly; (b) by allowing a search in the template space in addition to a search in the move space; and (c) by compensating loss in the "mind's eye" due to interference and decay. A computer model implementing the main ideas of the theory is presented, and simulations of its search behaviour are discussed. The template theory accounts for the slight skill difference in average depth of search found in chess players, as well as for other empirical data

Human transfer characteristics in flight and ground simulation for a roll tracking task

Human transfer characteristics in flight and ground simulation for roll tracking tas

Simple computer method provides contours for radiological images

Computer is provided with information concerning boundaries in total image. Gradient of each point in digitized image is calculated with aid of threshold technique; then there is invoked set of algorithms designed to reduce number of gradient elements and to retain only major ones for definition of contour

The Tropos Software Development Methodology: Processes, Models and Diagrams

Tropos is a novel agent-oriented software development methodology founded on two key features: (i) the notions of agent, goal, plan and various other knowledge level concepts are fundamental primitives used uniformly throughout the software development process; and (ii) a crucial role is assigned to requirements analysis and specification when the system-to-be is analyzed with respect to its intended environment. This paper provides a (first) detailed account of the Tropos methodology. In particular, we describe the basic concepts on which Tropos is founded and the types of models one builds out of them. We also specify the analysis process through which design flows from external to system actors through a goal analysis and delegation. In addition, we provide an abstract syntax for Tropos diagrams and other linguistic constructs

Mother Lucy’s Last Visit to Watervliet: Introduction

The Shaker Ministry considered certain texts to have a substantial sacred value and esteemed them as pearls that were not to be “cast before swine.” These were intended to be read only by the various society and family elders and eldresses and never shared with “the world’s people.” The Hamilton College Library recently acquired one such Shaker manuscript, probably dating to 1821 or shortly thereafter. It bears a caption title: “Mother’s Last Visit to Watervliet” and consists of nine unnumbered pages (filled) within a twenty-four page booklet. It is an important and early work, and was never published by the Shakers. It details the activities, meetings, counsels, and sayings of Mother Lucy Wright during the month preceding her death—from January 10, 1821 when she arrived at the Watervliet, New York Shaker society, to February 7, 1821 “when she expired a quarter before three O’clock.

Benn Pitman\u27s Visit to the Shaker Settlement—Whitewater Village, O. : Introduction

What may be the most interesting and detailed outsider’s account of the White Water community also has a history of scholarly elusiveness. It was written by Benn Pitman (1822-1910), a pioneer in the field of phonography and phonetics, who played a leading role in the development of the science of stenography. Pitman visited the White Water Shakers in 1855, two years after he had immigrated to Cincinnati from Wiltshire, England. Following his visit, he wrote and published an article entitled “Visit to the Shaker Settlement — Whitewater Village, O.” in The Phonographic Magazine in 1855

Anxiety, stress and job satisfaction versus education levels in rural police officers

Twenty nine police officers from four different departments in rural areas were tested regarding levels of stress or anxiety they experienced from inter-department issues, rules, and regulations. These findings were then compared with the officer’s levels of college education and contrasted with those officers with no college education. Additionally, comparisons were made regarding levels of college education and scores from the Fear of Negative Scale, Job Satisfaction Index, and the Stress Quiz. Further comparisons of the scores were made between officers who had attended college and those who had not and had experienced stress from critical incidents. While there were no significant findings, trends showed that officers without college hours reported less stress involving internal departmental issues