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Low-Flow Characteristics of Wisconsin Streams at Sewage-Treatment Plants

Description: Abstract: Low-flow characteristics of Wisconsin streams at 415 sewage-treatment plants are presented in this report. The low-flow characteristics presented are the annual minimum 7-day mean flow that occurs on the average of once in 2 years and the annual minimum 7-day mean flow that occurs on the average of once in 10 years. The low-flow characteristics at most sewage-treatment plants were determined by correlating baseflow measurements at the sewage-treatment plants to the concurrent daily mean flow at continuous-record gaging stations in the area. The accuracy determined by the standard error of estimate for the 10-year low flow ranged from 18 percent at continuous-record gaging stations to 70 percent when only three base-flow measurements were available. The standard error of 70 percent is larger than anticipated when the project was initiated. This was the result of extremely poor base-flow conditions during the 2-year data collection period. Additional base-flow conditions will be obtained during subsequent years which will improve the standard error somewhere between 29 and 45 percent.
Date: December 1974
Creator: Gebert, W. A. & Holmstrom, B. K.
Partner: UNT Libraries Government Documents Department

The Effect of Decreasing Defect Probabilities on Quality Control Inspection

Description: This study was a follow up to P. C. Dams' (1996) unpublished University of North Texas masters thesis, The effect of defect probability during training on inspection accuracy in a quality control simulation. Graphics of computer circuit boards were presented in dyads with an error free sample on the left and a comparison on the right. Comparisons had either a rotation or transposition defect, or were error free. Subjects had 10-s to accept or reject the comparison as identical to the sample. They were trained using two different stimulus fading procedures (using descending defect probabilities) and immediate feedback. Defect probabilities for the Tens were 0.60, 0.50, 0.40, and 0.30 and for the Twenties were 1.00, 0.80, 0.60, and 0.40. The last 4 pretraining and posttraining sessions were compared and the posttraining performance of the Twenties, as compared to the Tens, demonstrated greater improvement over pretraining performance. No firm conclusions could be drawn as to the effectiveness of either training procedure. The significance of the current investigation and suggestions for future research are discussed.
Date: May 1998
Creator: Segal, Jo Ann
Partner: UNT Libraries

Analytical laboratory quality control charting

Description: In life the importance of setting goals is stressed. The desired end result must be envisioned to chart a path and determine indicators to provide feedback on the process. Quality does not happen by accident but is achieved through a constant process of setting goals, process development, monitoring process indicators, fine tuning the process, and achieving results. These goals are to be focused and clearly measurable. In industry and life the setting of goals with clear process indicators is often difficult because of the variable end result and scarcity of measurements. Laboratories are fortunate in that they have a plethora of measurements with known or desired end results (controls) to monitor the process and give instantaneous feedback on quality. A key quality tool used by the laboratory to monitor and evaluate the lab processes is control charting. When properly utilized Quality Control (QC) Charts allow labs to be proactive in addressing problems rather than reactive. Several methods are available for control charting and some are listed in the references/information sources. The content for this paper is based on the control-charting program utilized at the Department of Energy's Fernald site. This control-charting program has specific areas of emphasis, simple charts, trend analyses, and effective follow-up.
Date: June 11, 2001
Creator: O'Bryan, Ervin F.
Partner: UNT Libraries Government Documents Department

Low-Flow Characteristics of Wisconsin Streams at Sewage-Treatment Plants and Industrial Plants

Description: From abstract: The purpose of this report is to present low-flow characteristics of Wisconsin streams at sewage-treatment and industrial plants. The low-flow characteristics are needed to implement water-quality standards for all surface waters of the State. Water-quality standards in Wisconsin are based on the annual minimum 7-day mean flow below which the flow will fall on the average of once in 10 years.
Date: March 1979
Creator: Holmstrom, B. K.
Partner: UNT Libraries Government Documents Department

Quality assurance practices by Indian manufacturing organizations: a conceptual framework and an empirical investigation

Description: The purpose of this study is three-fold. First, based on the synthesis of literature on quality concepts, critical factors that must be practiced to achieve effective quality management in an organization were identified. A framework to be used by organizations to evaluate their quality assurance practices were developed. Second, a field survey was conducted to identify the degree to which quality assurance is being practiced in Indian Manufacturing organizations and to locate the organizational areas where better management control can make the quality assurance system more effective. Finally, an attempt was made to develop models that could be used to forecast the level of quality achieved.
Date: December 1990
Creator: Motwani, Jaideep G.(Jaideep Gridhari)
Partner: UNT Libraries

The QCRad Value Added Product: Surface Radiation Measurement Quality Control Testing, Including Climatology Configurable Limits

Description: This document describes the QCRad methodology, which uses climatological analyses of the surface radiation measurements to define reasonable limits for testing the data for unusual data values. The main assumption is that the majority of the climatological data are “good” data, which for field sites operated with care such as those of the Atmospheric Radiation Measurement (ARM) Program is a reasonable assumption. Data that fall outside the normal range of occurrences are labeled either “indeterminate” (meaning that the measurements are possible, but rarely occurring, and thus the values cannot be identified as good) or “bad” depending on how far outside the normal range the particular data reside. The methodology not only sets fairly standard maximum and minimum value limits, but also compares what we have learned about the behavior of these instruments in the field to other value-added products (VAPs), such as the Diffuse infrared (IR) Loss Correction VAP (Younkin and Long 2004) and the Best Estimate Flux VAP (Shi and Long 2002).
Date: September 1, 2006
Creator: Long, CN & Shi, Y
Partner: UNT Libraries Government Documents Department

Developing an Empirically-based Framework of Metadata Change and Exploring Relation between Metadata Change and Metadata Quality in MARC Library Metadata

Description: This paper from International Conference on Knowledge Management, ICKM 2016 conference proceedings seeks to test and refine the metadata change framework initially developed for characterizing the change in digital library metadata, in the study of traditional library metadata.
Date: September 27, 2016
Creator: Zavalina, Oksana; Zavalin, Vyacheslav; Shakeri, Shadi & Kizhakkethil, Priya
Partner: UNT College of Information

Sampling Plan for Incoming Material Inspection at Sanden

Description: Sanden international, an automobile air conditioning compressor manufacturer, was facing a problem in its incoming material inspection procedures. Although the company had designed and was using its own sampling plan, some managers and supervisors where not confident of its reliability. Sanden recently established a goal for its total number of defects per supplier as one part per million. Achievement of this target required reviews of the existing sampling plan. The purpose of this project was to help Sandra identify the best alternatives for its incoming material inspection procedures. To do that considerations were made about the usefulness of sampling inspections, theoretical aspects of inspection sampling plans were examined, current sampling plans were analyzed and recommendations were made.
Date: December 1995
Creator: Puntel, Luis
Partner: UNT Libraries

Pressure Vessel Steel Surveillance Program for General Electric Power Reactors

Description: Abstract: "Pressure vessel steel surveillance programs are performed in nuclear power reactors to provide knowledge of the mechanical properties of the pressure vessel material as neutron irradiation proceeds. A standard surveillance program is described. Design of specimens, capsules, and associated equipment, as well as selection of test material and techniques for special preparation and testing, are discussed."
Date: January 8, 1965
Creator: Brandt, F. A.
Partner: UNT Libraries Government Documents Department

The Fixed v. Variable Sampling Interval Shewhart X-Bar Control Chart in the Presence of Positively Autocorrelated Data

Description: This study uses simulation to examine differences between fixed sampling interval (FSI) and variable sampling interval (VSI) Shewhart X-bar control charts for processes that produce positively autocorrelated data. The influence of sample size (1 and 5), autocorrelation parameter, shift in process mean, and length of time between samples is investigated by comparing average time (ATS) and average number of samples (ANSS) to produce an out of control signal for FSI and VSI Shewhart X-bar charts. These comparisons are conducted in two ways: control chart limits pre-set at ±3σ_x / √n and limits computed from the sampling process. Proper interpretation of the Shewhart X-bar chart requires the assumption that observations are statistically independent; however, process data are often autocorrelated over time. Results of this study indicate that increasing the time between samples decreases the effect of positive autocorrelation between samples. Thus, with sufficient time between samples the assumption of independence is essentially not violated. Samples of size 5 produce a faster signal than samples of size 1 with both the FSI and VSI Shewhart X-bar chart when positive autocorrelation is present. However, samples of size 5 require the same time when the data are independent, indicating that this effect is a result of autocorrelation. This research determined that the VSI Shewhart X-bar chart signals increasingly faster than the corresponding FSI chart as the shift in the process mean increases. If the process is likely to exhibit a large shift in the mean, then the VSI technique is recommended. But the faster signaling time of the VSI chart is undesirable when the process is operating on target. However, if the control limits are estimated from process samples, results show that when the process is in control the ARL for the FSI and the ANSS for the VSI are approximately the same, and ...
Date: May 1993
Creator: Harvey, Martha M. (Martha Mattern)
Partner: UNT Libraries

Quality framework proposal for Component Material Evaluation (CME) projects.

Description: This report proposes the first stage of a Quality Framework approach that can be used to evaluate and document Component Material Evaluation (CME) projects. The first stage of the Quality Framework defines two tools that will be used to evaluate a CME project. The first tool is used to decompose a CME project into its essential elements. These elements can then be evaluated for inherent quality by looking at the subelements that impact their level of quality maturity or rigor. Quality Readiness Levels (QRLs) are used to valuate project elements for inherent quality. The Framework provides guidance for the Principal Investigator (PI) and stakeholders for CME project prerequisites that help to ensure the proper level of confidence in the deliverable given its intended use. The Framework also Provides a roadmap that defined when and how the Framework tools should be applied. Use of these tools allow the Principal Investigator (PI) and stakeholders to understand what elements the project will use to execute the project, the inherent quality of the elements, which of those are critical to the project and why, and the risks associated to the project's elements.
Date: September 1, 2008
Creator: Christensen, Naomi G.; Arfman, John F. & Limary, Siviengxay
Partner: UNT Libraries Government Documents Department

Development of a low-cost extruded scintillator with co-extruded reflector for the MINOS experiment

Description: The MINOS experiment is a long-baseline, neutrino-oscillation experiment. In total, 28,000 m{sup 2} of scintillator is needed for the experiment. This is almost 300 tons of finished scintillator. The solution has been the development of an extruded scintillator with a 2-mm deep grove in the upper surface for a wavelength-shifting fiber and a co-extruded TiO{sub 2} coating as a reflector. The TiO{sub 2} coating also allows the scintillator to be directly epoxied into panels. Production and quality control techniques are presented.
Date: December 11, 2000
Creator: al., David F. Anderson et
Partner: UNT Libraries Government Documents Department

Reliability of Electronics

Description: The purpose of this research is not to research new technology but how to improve existing technology and understand how the manufacturing process works. Reliability Engineering fall under the category of Quality Control and uses predictions through statistical measurements and life testing to figure out if a specific manufacturing technique will meet customer satisfaction. The research also answers choice of materials and choice of manufacturing process to provide a device that will not only meet but exceed customer demand. Reliability Engineering is one of the final testing phases of any new product development or redesign.
Date: December 2014
Creator: Wickstrom, Larry E.
Partner: UNT Libraries

The Quality of Medical Care: Information for Consumers

Description: Changes in how physicians and hospitals are paid have made individual consumers, health insurers, employers, and medical providers more sensitive to the cost implications of their decisions. At the same time, these policy changes have elevated the importance of having consumers be informed about the quality of medical providers. Purchasers of medical care (individual consumers, employers, health insurers) need to know about any differences in quality so that they can weigh quality along with cost in making decisions.
Date: June 1988
Creator: United States. Congress. Office of Technology Assessment.
Partner: UNT Libraries Government Documents Department

Performance Evaluation of MPLS on Quality of Service in Voice Over IP (VoIP) Networks

Description: The transmission of voice data over Internet Protocol (IP) networks is rapidly gaining acceptance in the field of networking. The major voice transmissions in the IP networks are involved in Internet telephony, which is also known as IP telephony or Voice Over IP (VoIP). VoIP is undergoing many enhancements to provide the end users with same quality as in the public switched telephone networks (PSTN). These enhancements are mostly required in quality of service (QoS) for the transmission of voice data over the IP networks. As with recent developments in the networking field, various protocols came into market to provide the QoS in IP networks - of them, multi protocol label switching (MPLS) is the most reliable and upcoming protocol for working on QoS. The problem of the thesis is to develop an IP-based virtual network, with end hosts and routers, implement MPLS on the network, and analyze its QoS for voice data transmission.
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Date: December 2002
Creator: Chetty, Sharath
Partner: UNT Libraries

Improvement of Quality in Publication of Experimental Thermophysical Property Data: Challenges, Assessment Tools, Global Implementation, and Online Support

Description: Article on the improvement of quality in the publication of experimental thermophysical property data.
Date: September 6, 2013
Creator: Chirico, Robert D.; Frenkel, Michael; Magee, Joseph W.; Diky, Vladimir; Muzny, Chris D.; Kazakov, Andrei F. et al.
Partner: UNT College of Arts and Sciences