The purpose of this paper is to discuss some of the theory of Boolean matrices and apply this theory to construct contact networks by using algebraic methods.
The first section of this paper (Chapter I to III) describes Boolean algebra and its properties, the theory of Boolean matrices, and the...
This paper describes an investigation of a matrix algebraic method to determine isomorphism in pairs of undirected graphs. The method is described in some detail. The theoretical as well as the practical difficulties are given. It is shown that the method works for some cases. When the adjacency matrix of...
The material in this paper is divided into the following four chapters for convenience. Chapter 1 explains, how the idea of fault testing changed from testing the machine instructions to testing the hardware in logic circuits. Chapters 2, 3 and 4 present the different approaches considered, namely:
1. Path sensitizing...
Contemporary database systems are used in a variety of business applications requiring rapid retrieval of online data. When records contain unique information indexed by a single key, the retrieval operation can be simplified. However, when added generality and flexibility is needed, inverted files and sophisticated data models result in a...
In analyses of multivariate data, a classification of the data into related groups is frequently desired. This is generally referred to as the clustering problem. It has been studied in detail and many clustering algorithms exist. Most of these algorithms, however, require experimenting with the actual data before satisfactory results...
This paper describes a Lesson Generating System for CAI, which, by relieving the course author from the burden of programming, provides an efficient means for developing courseware to augment classroom instruction.
The paper describes research on the representation of knowledge. The goal is to develop a formalism which can be used for the testing of hypotheses on the nature of human understanding and as a foundation or artificial intelligence programs. The ideas expressed herein are implemented in a program which converses...
The information processing industry is one of the fastest growing, and most dynamic industries on the scientific as well as business scene, today. Progress in designing and applying computing systems has out raced progress in evaluating their performance. In order to circumvent this trend, there should be a simultaneous development...
A digital computer is characterized by the instruction set it executes. Each machine instruction is a bit pattern which is to be interpreted by the central processing unit CPU. The traditional way to interpret a machine instruction is to use random hardware. A contemporary approach is to install a program...
The northern Oregon coast suffers extensive loss of land as a result of landslides which constitute the primary mechanism of coastline recession. Both real property and structures along the coast have been destroyed and this destruction will continue. In certain instances, it may be feasible to protect property by engineered...
Stem form development of trees in response to wind has been established in the literature to be a response to stem sway induced by the wind. The response is manifested in modifications to height and diameter growth which strengthen the stem against wind stresses. Experiments in the literature show that...
Buffer strips have been proposed as a method for controlling temperature changes in streams adjacent to clear-cuttings. Nine small mountain streams in Oregon's Coast Range and Cascade Mountains were studied to determine the influence of buffer strips on water temperature. Timber volume in the strip, strip width, and canopy density...
This paper describes the analysis of data from a three-year gross time study of skyline, balloon, and helicopter yarding systems operating in Western Oregon. Data collection activities were designed and supervised by the Pacific Northwest Forest and Range Experiment Station, U.S.D.A. Forest Service. The specific logging systems studied were running...
As the demands for forest products increase, additional timber harvesting operations can be expected on steep mountainous terrain, The resulting disruption of natural slope stability by man's disturbances (roadbuilding, logging and vegetative manipulation, etc.) may also accelerate mass movement processes in this terrain. Swanston (1969) defines mass movement as ".,...