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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

First law energy balance as a data screening tool

Shao, Xiaojie 16 August 2006 (has links)
This thesis defines the Energy Balance Load ( BL E ) as the difference between the heating requirements plus the electric gains in the building and the cooling coil loads. It then applies a first law energy balance in conjunction with the concepts of analytical redundancy (AR) and trend checking to demonstrate that measured values of BL E can be compared with the simulated characteristic ambient temperature-based BL E to serve as a useful tool to identify bad data. Uncertainty and sensitivity analysis are introduced to analyze the impact of each building or system parameter to the simulated values of BL E . A Visual Basic for Application (VBA) program has been developed through this research work, which applies the methodology illustrated in this thesis to automatically prescreen the measured building energy consumption data with the inputs of several key parameters. Through case studies of six on-campus buildings, the methodology and the program successfully identified monitored consumption data that appears to be erroneous, which may result from incorrect scale factors of the sensors and the operational changes to the building that may enormously affect the key parameters as the simulation inputs. Finally, suggestions are given for the on-line diagnostics of sensor signals.
2

IMPROVING DATA QUALITY WITH FOUR SHORT SENTENCES: HOW AN HONOR CODE CAN MAKE THE DIFFERENCE DURING DATA COLLECTION

McKay, Alexander Scott 01 June 2014 (has links)
Careless responders have a large impact on a study by causing issues such as Type II errors (failing to reject a false null hypothesis), which then waste researchers’ time and money. Research on careless responding has focused primarily on detecting and removing careless responders rather than on reducing careless responding before data collection begins. The purpose of the present study was to test the use of honor codes with or without the presentation of a picture of watchful eyes to increase self-awareness thereby reducing careless responding. Participants (N = 305) were randomly assigned to one of five honor code conditions (control condition, read-only condition, type condition, read-and-eyes condition, or type-and-eyes condition) and then completed a number of personality measures. Participant’s responses were screened for careless responding. I found that when participant’s only read an honor code without a picture of watchful eyes on the screen, they were significantly more likely to engage in careless responding than were people in the control condition. There was no significant difference in careless responding in the control condition compared to the other three conditions (type condition, read-and-eyes condition, or type-and-eyes condition). This finding indicates that participants being presented only with an honor code, and no other cues of moral behavior, might lead to psychological reactance (i.e., participants perceiving their freedom or control was threatened). This psychological reactance was likely due to participants feeling coerced to respond honestly by the honor code rather than participants responding honestly on their own accord. Additionally, there were no differences on participant’s responses across conditions on a number of personality measures that may be sensitive to increased self-awareness. A number of exploratory analyses were also conducted to further examine psychological reactance. The present study provides answers and possible directions to a number of useful questions that could improve data quality and reduce potential negative effects of honor codes under certain circumstances.

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