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Sampling For Volatile Organic Compounds From An Aquitard: A Field Evaluation Of Screen Length, Purging Method, And Sampling Time, Amy Josephine Alduino
Sampling For Volatile Organic Compounds From An Aquitard: A Field Evaluation Of Screen Length, Purging Method, And Sampling Time, Amy Josephine Alduino
UNLV Retrospective Theses & Dissertations
Purging method, sampling time, and screen length were compared to determine their impact on the collection of representative ground-water samples from monitoring wells sited in an aquitard contaminated with volatile organic compounds (VOC); Two well-purging methods--(1) pump to the bottom of the screened interval and (2) pump to the top of the screened interval--were evaluated on three monitoring wells with different screened intervals (0.75-m and 3.0-m screen lengths); Monitoring wells completed in an aquitard should be purged before collecting ground-water samples for VOC analysis. Samples collected 2-8 hours after purging were statistically similar and representative of the highest VOC concentrations …
Consideration Of Interdependencies In The Relational Database System, And, A Proposal And Evaluation Of An Expert System For The Relational Database Structure, Timothy Jon Arndt
Consideration Of Interdependencies In The Relational Database System, And, A Proposal And Evaluation Of An Expert System For The Relational Database Structure, Timothy Jon Arndt
UNLV Retrospective Theses & Dissertations
This thesis addresses the issue of interdependencies in Distributed and non-Distributed Relational Database Management Systems and proposes a design and development of an Expert System to manage and enhance the current available Database Structures; In the first part, we study, compare and evaluate the interdependencies found in the operating environment relevant to the Distributed Relational structure. Hardware and software configurations are grouped and compared in an attempt to understand the interdependencies of the system so that an optimal configuration may be obtained; In the second part, we designed and developed an Expert System configuration with ease of use and functionality …