Showing papers on "Component (UML) published in 1970"

Process for measuring wear on a drilling tool

Abstract: The wear on a drilling tool is measured by picking up certain vibrations produced by rotating said tool, which vibrations have a component indicative of the extent to which the tool has worn. The indicative component may be at least partially isolated so as to produce a more exact result.

The mutual exclusion problem

Abstract: This paper discusses how n components, which may be programs or circuits, in a computer system can be controlled so that (1) at most one component may perform a designated "critical" operation at any instant and (2) if one component wants to perform its critical operation, it is eventually allowed to do so. This control problem is known as the mutual exclusion or interlock problem. A summary of the flow table model [Stanford University Department of Computer Science report STAN-CS-70-160] for computer systems is given. In this model, a control algorithm is represented by a flow table. The number of internal states in the control flow table is used as a measure of the complexity of control algorithms. A lower bound of n + 1 internal states is shown to be necessary if the mutual exclusion problem is to be solved. Procedures to generate control flow tables for the mutual exclusion problem which require the minimum number of internal states are described and it is proved that these procedures given correct control solutions. Other so-called "unbiased" algorithms are described which require 2.n! internal states but break ties in the case of multiple requests in favor of the component that least recently executed its critical operation. The paper concludes with a discussion of the tradeoffs between central and distributed control algorithms.

Early detection of damage to machine elements in rolling engagement

Abstract: A system for detection of damage to a machine element in rolling engagement to another machine element utilizing the component of vibration produced by such damage. Successive cycles each including the component of vibration produced by the damage are summed to enhance and render detectable such component of vibration.

A general approach to twin-t design and its application to hybrid integrated linear active networks

Abstract: In this paper we approach twin-T design with a view to controlling the sensitivity of the transmission zero with respect to component variations, according to criteria that are of particular interest in the design of hybrid integrated linear active networks. We give design examples and derive conditions that relate null depth and component characteristics with expected zero displacement in the s-plane.

The method of making an electrical component

Abstract: The method comprises forming a lead frame having a plurality of sets of leads and connecting at least one electrical element to each set of leads. The elements are preencapsulated with a pressure-distributing material which is substantially free of gases. The preencapsulated elements are then encapsulated and the respective elements and their associated leads are separated to provide the electrical components. The invention further includes the electrical component per se.

The correctness of a modified SECD machine

Abstract: Landin's SECD Machine does not completely compute certain expressions of the l-calculus and so is modified by the addition of an output component and a unique name counter. This modified machine is proven to correctly implement the l-calculus.

Checking by pseudoduplication

Abstract: An error detection system is described which detects errors by performing a given arithmetic or logical operation using one data path followed by the performing of the same arithmetic or logic operation using a different data path. The results of the two arithmetic or logical operations are then compared, the failure of the two results to be identical indicating failure of a component used in the performance of the arithmetic or logical operation.

Assembly tolerance control spacer

Abstract: AN ASSEMBLY TOLERANCE CONTROL SPACER TO ABSORB OR TAKEUP SPACE DIFFERENCES OCCURRING IN A PRODUCT MADE UP OF A PLURALITY OF COMPONENTS HAVING SIZE OR TOLERANCE CHARACTERISTICS WHICH MAY VARY FROM COMPONENT TO COMPONENT, THE CONTROL SPACER BEING INCLUDED IN THE ASSEMBLED PRODUCT SO AS TO ABSORB TOLERANCE VARIATIONS BY COLLAPSING MORE OR LESS TO RESULT IN A PREDICTABLE ASSEMBLY RESULT FOR THE PRODUCT.

Minimization of Misclassification of Component Failures in a Two-Component System

Abstract: In this paper we assume we are repairing two-component series systems that have failed or are malfunctioning. It is further assumed that when a system is brought into the repair shop, it is not known with certainty which component has failed. If the repairman begins repairing the wrong component, a misclassification cost is incurred. It is also assumed that some resources are available for the purchase and operation of a failure detection mechanism that, depending on the amount allocated for detection, enhances the probability of correctly detecting the failed component. A study is then made that is designed to minimize the expected cost of failure detection. Examples are included.

Air leveling system for an automotive vehicle

Abstract: An air leveling system for an automotive vehicle in which a pneumatic means is interposed between a sprung and an unsprung component of the vehicle for controlling the height of the sprung component with respect to the unsprung component as a function of the pressure of the air in the pneumatic means. An air compressor driven by an electric motor supplies air to the pneumatic means and the electric motor is connected to a source of electrical energy when the height of the sprung component with respect to the unsprung component is below a predetermined minimum. Also, an electrically operated, normally closed bleed valve is connected to the pneumatic means, and this electrically operated, normally closed valve is connected to the source of electrical energy thereby opening it when the height of the sprung component with respect to the unsprung component is above a predetermined maximum.

On nucleus component durations.

Abstract: Spectrographically derived measurements of the durations of the component sections of 19 different vocalic nuclei in the /h - d/ frame allow an estimation of the roles of linguistic, individual and...

The notion of a permissible misclose in traversing

Abstract: It is shown that a small misclose in traversing can not reliably guarantee that the traverse stations have been fixed accurately enough, nor that the component observations have been precise enough. Hence it is recommended that the use of an allowable misclose as a means of specifying precision should cease.

The R & D game: technical men, technical managers, and research productivity

Abstract: "Science has the power to cause the organization to set off in new directions," writes David Allison, "even to cause the organization to alter its structure." And through the organization, corporate science is changing the pattern of our lives. Its power has become so manifest that "R&D" is now understood by a large public to mean the "research and development" component of a corporation. And yet the actual workings of R&D have themselves been little researched up to now. This book confronts many questions about R&D, and if it provides even more answers, that is all to the good at this point--a real start has finally been made.The questions and answers are provided by a number of qualified observers, ranging from psychiatrists and social psychologists to R&D managers and marketers. Their contributions are collected in three sections, one on the nature of the technical men who staff the corporate laboratories, another on the nature of the corporate organizations themselves, and between them--forming the middle section of the book--an investigation of the environment affected by the interaction of the two. Editor Allison sets the stage for each section with an introductory essay.

Method of delineating small areas as in microelectronic component fabrication

Abstract: Overlapping geometric areas, such as intersecting stripes are used to define precise small areas while minimizing alignment problems. The method can be applied to making diffusion windows in semiconductor manufacture.