Showing papers on "Domain (software engineering) published in 1969"

Archetypes in Man-Computer Problem Solving

Abstract: Information systems applied to operational environments have meaning only in what they do for humans performing tasks, whether clerical, technical or managerial. Each person's job-position entails interaction with a limited set of categories of variable data. By 'limited' is meant less than several thousand, and more likely several hundred, categories. A category set associated with a collection of tasks performed by an individual or an organization may be called a category domain. This concept makes possible a practicable (in size) data base responsive to support human tasks in human (psychological) time. An analysis of human problem-solving tasks reveals the following gamut: simple inquiry and update, status inquiry, briefing, exception detection, diagnosis, planning/choosing, evaluating/optimizing, constructing (designing), and discovery. There is no compulsive orderinig of these on a complexity scale. The information processing structure of each is exarnined: some common denominators among this set reveal five underlying archetypes of interaction. By making these archetypes explicit and consistent with concepts of domain, application disciplines and system design can move in parallel and generate a simple, well-defined language structure betweefn system and human user.

Circular Domain Configuration in GdIG

Abstract: Circular domains can be formed in GdIG by applying a train of short, fast‐risetime pulses of magnetic field. The density of these domains depends on the temperature at which they are formed. After formation, the domain size can be varied without affecting the density by changing the temperature or applying a dc bias field.

Analysis and simulation of domain propagation in nonuniformly doped bulk GaAs

Abstract: A study of domain behavior in nonuniformly doped bulk semiconductor devices is undertaken, leading to a simple graphical technique useful for the analysis of these structures. Several device configurations are treated in this fashion and further examined with the aid of a digital computer program written by the author for simulation of the bulk effect in n-GaAs. The operation of these devices is illustrated with computer-generated graphic displays of electric field, carrier distribution, and device current as a function of time.

A new approach to memory and logic-cylindrical domain devices

Abstract: Magnetic domain behavior in single crystal magnetic oxides has been studied extensively over the last several decades. These investigations, both theoretical and experimental, are an attempt to better understand these materials and their complex domain structures. Recently single crystal oxides have been utilized in memory and logic devices. This paper will update work on cylindrical domains in orthoferrites first published in 1967 and later discussed at the 1968 and 1969 Intermag Conferences.

Magnetic domain propagation arrangement

Abstract: Single wall domain propagation circuits include herein both magnetically soft overlays which define propagation paths along which domains move in response to reorienting in-plane fields and electrical conductors which act on magnetically hard regions in the overlay, when pulsed, to modify locally pole patterns generated by the in-plane fields. An organization in which domains are moved in a manner to eliminate unwanted effects of current pulses in those conductors on stored domain patterns is described.

Anhysteretic magnetization processes in multidomain crystals and polycrystals

Abstract: The third model is found to be unrealistic, for a polycrystalline material without any second phase at the grain boundaries, and it is shown that the observed magnetization behaviour may be more generally accounted for in terms of the misorientation between grains. The calculations are precise, but the results are dependent on the initial choice of model domain structure and any limitations imposed on the way in which the walls move. 1. INTROtDUCTION Real domain structures vary greatly in character, according to the intrinsic properties and microstructure of the specimen involved, and certain simplifications are necessary for the calculation of domain structure to be practicable. The first is to deal only with equilibrium structures, where the domain walls are in a position of minimum energy, i.e. to ignore any resistance to wall motion. The next simplification is to deal only with 180? domains; uniaxial materials contain only 1800 domains, and oriented cubic materials contain predominately 180? domains, and may be considered to be uniaxial as an approximation. The magnetic materials are supposed to have high anisotropy, so that the It effect is negligible. These restrictions are complied with in many experimental materials. A further restriction of a more fundamental nature, which is unavoidable in domain theory, is the necessity to devise a plausible structure for analysis. Since the analysis proceeds by minimizing the energy, we normally postulate a structure whose geometric form and energy can be described as a function of a limited number of parameters. The total energy of the system is then minimized with respect to these parameters. The form of the solution is thus imposed by the initial choice of domain structure and the freedom of movement. This objection to domain theory is discussed by Brown (I962), who would prefer the entire domain structure to be obtained from first principles as a solution of the fundamental equations. This micromagnetic approach has been used successfully in the treatment of single domain particles, but unfortunately becomes of insuperable complexity when dealing with a multidomain structure. In this paper we consider the domain structure in an applied field of an isolated

Hierarchial Needs of Gifted Boys and Girls in the Affective Domain.

Abstract: * Three tables and/or figures which go with this paper have been omitted because of space limitations. They may be secured by writing J. C. Gowan, State College, Northridge, Cal. 91324. Maslow (1954) maintained basic needs will increase valences and dominate psychological behavior until the need is satiated or relieved. He placed needs in the heirarchical order of physiological, safety, love and belongingness, self-esteem, and self-actualization. The last category, self-actualization, is assumed to be the epitome of psychological health. At that level, a person is relatively free to use his potential in positive production. Applying this need concept to gifted children, Gowan (1967) wrote that gifted children with unresolved Maslovian needs &dquo;get by&dquo; by operating at a lower level of efficiency. Only when the primitive levels are satisfied, can bright children give their best cognitive performances. Following his original table, &dquo;Ericksonian Stages and Their Counseling Problems,&dquo; Gowan (1968) again emphasized the affective domain when he postulated that socialization instead of intellectualization should be stressed in education.

Q-Typing in the Domain of Manifest Needs.

Abstract: STEPHENSON (1953) proposed that types could be identified by intercorrelating actial persons or group representatives, on the basis of their responses to ipsatively presented items, and by factor analyzing the resultant matrix. Gordon (1969) tested Stephenson’s typological model by treating the Survey of Interpersonal Values (Gordon, 1960) as a structured Q-sort (Gordon and Hofmann, 1968) and by factor analyzing intercorrelations based on mean scores of 59 different American samples. The outcome of this analysis was high positive. Four factors accounted for more than 98 per cent of the variance. Each of the factors was clearly defined by a set of groups which had in common characteristics making highly plausible their having substantial loadings on the same factor. Mean trait scores of the defining groups were meaningful and consistent with known group characteristics, and highly interpretable results were yielded for groups with significant loadings on more than one factor. Additionally, individual correlation coefficients between groups were found to be interpretable in their

Design of linear feedback controllers for nonlinear plants

Abstract: Two related methods are developed for designing linear feedback controllers for nonlinear plants with initial states that are unknown but restricted to a given domain. It is shown that the well-known neighboring optimum method of controller design can be considered as a special case of the methods proposed here.

Errors in frequency-domain processing of images

Abstract: Practical techniques for the determination of image spectra have been developed and become popular in the past few years. Both optical processing systems and digital computers can be used to perform linear filtering via the frequency domain. Optical processing systems use Fourier-transforming lenses and coherent light. Digital computer software uses the Cooley-Tukey algorithm to advantage, while computer hardware must be augmented by optical scanning devices that interface with images. Processing errors arise in both types of systems, but for different reasons. In this paper we present some results concerning errors in the spatial frequency domain.

A new technique for improving domain pictures in kerr-effect microscopy using a laser source,

Abstract: The use of a rotating diffusing screen is reported for obtaining domain pattern pictures of high contrast in the Kerr-effect microscope working with a helium-neon continuous wave laser. A brief review analysis is presented to examine the origin of the speckled appearance and the methods for its elimination. The present experimental technique gives completely satisfactory results and is illustrated by a few domain photographs obtained with this apparatus.

Theoretical and Experimental Study of the Quenched-Domain Mode Gunn-Effect Oscillator

Abstract: A general large-signal analysis of the quenched-domain mode of Gunn-effect devices has been developed which is applicable to any device without extensive device measurements. Some applications of such an analysis are demonstrated and others are being investigated. The phenomenological model includes such effects as domain formation, domain quenching, domain behavior in the presence of an RF voltage, displacement currents, the voltage dependence of domain width and others.

Trademark.com: Trademark Law in Cyberspace

Abstract: his article examines the current issues in trademark law surrounding internet domain names. The author introduces the topic with a detailed explanation of the use and purpose of domain names, the significance of the various levels in domain names and how domain names compare and contract mth IP addresses. Of significant difference is the use of words and names in domain names. Organizations often use recognizable and familiar names to improve the chance Internet users will access their websites. Trademark issues are sparked by the battle to obtain and/or retain these highly sought after domain names. The author discusses the areas of conflict when: I) a domain name is registered by an individual who has no connection with the mark, 2) two or more organizations have claims to the same domain name, 3) one domain name is confusingly similar to another, and 4) when second level domain names can be assigned to multiple first level domain names. Two essential legal issues are identified: whether domain names are protectable as trademarks and whether a domain name can violate a trademark. Courts have used the analogy of telephone mnemonics to help answer these issues in favour of recognizing mnemonics as a protectable trademark, although there is split authority on how much protection can be given to domain names that incorporate generic terms. Trends in litigation in the United States, Canada, and the United Kingdom are discussed. Despite the de facto judicial power given to NSIfor dispute resolution, the author identifies fundamental flaws of the NSI policy owing the current controversies over Internet domain names. The article concludes with a discussion of several major proposals to implement changes regarding domain names allocation.