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Classification Accuracy Of The Wrist-Worn Genea Accelerometer During Structured Activity Bouts: A Cross-Validation Study, Whitney Allegra Welch
Classification Accuracy Of The Wrist-Worn Genea Accelerometer During Structured Activity Bouts: A Cross-Validation Study, Whitney Allegra Welch
Masters Theses
Purpose: The purpose of this study is to determine whether the left wrist cutpoints of Esliger et al., for the triaxial GENEA accelerometer, are accurate for predicting intensity categories during 14 different activities including; treadmill-based, home and office, and sport activities. Methods: 130 adults wore a GENEA accelerometer on their left wrist while performing various lifestyle activities. The Oxycon Mobile Portable Metabolic Unit was used to measure oxygen uptake during each activity. Statistical analysis used Spearman’s rank correlations to determine the relationship between measured and estimated intensity classifications. Cross tabulation tables were constructed to describe under or over …
Reduced Leak Calibration Uncertainties By The Outgassing Quantification Method, Philip Mason Carper
Reduced Leak Calibration Uncertainties By The Outgassing Quantification Method, Philip Mason Carper
Masters Theses
Standard leaks are used throughout industry for various applications, such as gas transfer, calibration of mass spectrometers, and calibration of leak detectors. The ability to provide a controlled delivery of gases at relatively low flow rates makes standard leaks a popular choice for calibration standards. This ability also allows for precise quantities of gas to accumulate over time. The accumulation of gas from standard leaks is used as a “transfer standard” for making in-process adjustments to measurement instrumentation. With the advent of tighter quality control constraints, the quantification and control of leak rates is becoming an increasingly important matter, placing …