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  • Multi-level concurrency control of a database system

    Creator:
    Minoura, Toshimi
    Abstract:
    A typical database system maintains target data, which contain information useful for users, and access path data, which facilitate faster accesses to target data. Further, most large database systems support concurrent processing of multiple transactions. For a static database system model, where units of concurrency control are not dynamically created...
    Resource Type:
    Technical Report
    Full Text:
    integration of these two kinds of concurrency control methods fails because of the phantom problem. In this

  • Position estimation

    Creator:
    McKenney, Paul E.
    Abstract:
    Acoustic position estimation is used where high accuracy navigation is required over a small area, such as for searching or for collecting gravitational or geomagnetic data. In this position estimation method, a surface ship or submersible periodically sends out a high-frequency acoustic 'ping' at a prearranged frequency. This ping is...
    Resource Type:
    Technical Report
    Full Text:
    Newton's method with exact linesearch to minimize an error function whose domain is the set of

  • Effects of programming experience in debugging semantic errors

    Creator:
    Oman, Paul W., Cook, Curtis R., and Nanja, Murthi
    Abstract:
    This paper presents the results of a controlled experiment comparing debugging abilities of novice, intermediate and skilled student programmers. Debugging performance differences were studied using two single-page Pascal programs: a binary search program and a median calculation program. Two types of semantic errors, array bounds and undefined variable, and two...
    Resource Type:
    Technical Report
    Full Text:
    debugging methods, the experts were more effective in their application of specific techniques. This

  • Computer science and computer engineering research equipment

    Creator:
    Tonge, Fred M.
    Abstract:
    This grant supported acquisition of a minicomputer system for departmental research. The equipment selected is a DEC VAX-11/750 system, installed in remodeled space in the Computer Science (formerly Farm Crops) Building. Grant funds for equipment acquisition were supplemented by support from the Tektronix Foundation. After completion of the physical facilities...
    Resource Type:
    Technical Report
    Full Text:
    Metrics for a Restricted Class of Programs" by w. Harrison, submit- ted to the Journal of Systems and

  • Object-Oriented simulation model of a Digital Switching System

    Creator:
    Krishnapura, SheshaPrasad G.
    Abstract:
    In this project we have implemented an Object-Oriented simulation model of a Digital Switching System. We analyzed various software components of a Digital Switching System. The call processing module is the principal component and the most complex of all. The features of Object-Oriented principles were investigated and found to fit...
    Resource Type:
    Capstone Project
    Full Text:
    , Inheritance and Method binding [Budd 90]. • Messages and methods: Action is initiated by the transmission of

  • Parallel performance tuning using moments of utilization data

    Creator:
    Godin, T. J.
    Abstract:
    Many performance tuning tools for parallel software use visual representations of trace data to guide a developer towards code improvements. Most widely used visualization schemes, however, either omit useful information about time dependence of processor use, or include that information but do not scale well to long run times or...
    Resource Type:
    Capstone Project
    Full Text:
    parameters that characterizes the most important features of a program's profile data. The moment method

  • Relationship of pauses to problem solving events in mechanical design protocols

    Creator:
    Chamberlin, Martha J.
    Abstract:
    Protocol Analysis is a technique that is commonly applied to study human problem solving. The measurement of reaction time ( or timing analysis) is another technique commonly used to study human cognitive behavior, including human problem solving. This paper examines the process of applying both of these tech­niques to the...
    Resource Type:
    Capstone Project
    Full Text:
    process [14]. A major advantage of protocol analysis over previously used methods is that it is a

  • The applicability of a general relational database management system for developing an automated library system : a preliminary investigation

    Creator:
    Hackleman, Debbie
    Abstract:
    An automated library system should be capable of providing at least all of the information and capabilities of existing manual catalogs. In addition, an automated system must provide the capability of manipulating that information to produce varying types of reports and statistics. This paper briefly: - describes historical representations of...
    Resource Type:
    Capstone Project
    Full Text:
    require its complete reproduction. T~e card catalog is currently the most universally used method of

  • A TINI infrared application

    Creator:
    Ritchie, Clark
    Abstract:
    Monitoring the performance of electrical utility assets is a critical activity for power companies. Gas chromatography has long been established as the analytical technique of choice for assessment of transformer fault conditions by detection of the presence of key fault gases through analysis of transformer oil. Chromatography is one of...
    Resource Type:
    Capstone Project
    Full Text:
    , which is really a method that starts 9 ) the process of collecting data from the gas analyzer

  • Capacity planning in Unix environments

    Creator:
    Deng, Xueping
    Abstract:
    Capacity Planning is a gradually recognized need in UNIX environments. However, the effort to address this problem has been more or less event driven and is often discarded after crises are over. The main cause to this situation is that the tools to support the CP function in UNIX environments...
    Resource Type:
    Capstone Project
    Full Text:
    programs for doing this are necessary. The second method is used in the project. Validation of the