1. ASSESSMENT OF EFFECTIVE DOSES BASED ON VARIOUS RADON MEASURING TECHNIQUESNataša Smrekar, 2016, master's thesis Abstract: In my master's thesis, I have focused on radon gas in 43 buildings used for different purposes (23 schools, 3 kindergartens, 16 offices and a residential house) in which preliminary measurements had shown higher concentrations of radon gas. I carried out measurements of radon and short-lived radon products whilst simultaneously employing different measurement techniques. In all 43 buildings, I measured the instantaneous concentration of radon by using scintillation cells; in 18 buildings, I additionally measured the average concentration of radon by using solid state nuclear track detectors and in 10 buildings, I measured concentration retrospectively with solid state nuclear track detectors. In four selected buildings (a school, a kindergarten, an office and a residential house), I carried out the measurements by using all of the available equipment. I monitored the daily fluctuations of concentration of radon and short-lived radon products by using continuous monitors in 14 buildings. This is how I obtained the factor of radioactive equilibrium between radon and its short-lived products. Based on the results obtained, I calculated the effective doses. As the basis for calculating the doses, I used the instantaneous and average concentrations of radon and the equilibrium factor taken from literature (0.40) or own measurements. I compared the doses and critically evaluated them.
In contrast to the previous research, I researched radon exclusively in areas with increased risk for radon. I studied the influence of the working regime on the concentration of radon in different working environments (i.e. a school, a kindergarten and an office). Found in: ključnih besedah Summary of found: ...and a residential house) in which preliminary measurements had shown higher concentrations of radon gas.... Keywords: Radon, short-lived radon products, measurement technique, scintillation cell, solid-state nuclear track detector, retrospective detector, equilibrium factor, effective dose, comparison. Published: 28.09.2016; Views: 5346; Downloads: 274
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2. Depth-resolved ultra-violet spectroscopic photo current-voltage measurements for the analysis of AlGaN/GaN high electron mobility transistor epilayer deposited on SiBurcu Ozden, Chungman Yang, Fei Tong, Min Khanal, Vahid Mirkhani, Mobbassar Hassan Sk, Ayayi Ahyi, Minseo Park, 2014, original scientific article Found in: ključnih besedah Keywords: AlGaN/GaN high electron mobility transistor, Depth-resolved ultra-violet spectroscopic photo current-voltage measurement Published: 16.01.2017; Views: 3858; Downloads: 0
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3. Growth of nanostructured ZnO on wearable fabrics for functional garmentMinseo ParK, Fei Tong, Achintya Sujan, Yoonsung Chung, Minseo Park, Bruce Tatarchuk, Helen Koo, Hosang Ahn, Young Soo Yoon, Dong-Joo Kim, 2014, original scientific article Found in: ključnih besedah Keywords: ZnO, Fabrics, Dip-pad-cure method, Nanorods, Diffuse reflectance, IV measurement Published: 16.01.2017; Views: 3803; Downloads: 0
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4. Solution-Based Fabrication of Carbon Nanotube Bumps for Flip-Chip InterconnectsXu Pingye, Fei Tong, Virginia Davis, Minseo Park, Michael Hamilton, 2014, original scientific article Found in: ključnih besedah Summary of found: ...Resists, Fabrication, Electrical resistance measurement, Substrates, Dispersion, Resistance, Surface treatment... Keywords: Resists, Fabrication, Electrical resistance measurement, Substrates, Dispersion, Resistance, Surface treatment Published: 16.01.2017; Views: 3486; Downloads: 0
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5. THE CALIBRATION PROCESS OF A MANUFACTURING LINE IN THE AUTOMOTIVE INDUSTRYAleksandar Kuzmanovski, 2022, undergraduate thesis Abstract: Calibration of measuring instruments in the industry is a process that is done regularly both internally by internal laboratories operating within the companies and externally by accredited external laboratories. The goal of the diploma thesis was to document and carry out the calibration process of a production line within a manufacturing plant, and to deliver a final report on the overall calibration.
The result is obtained by calculating the combined uncertainty of the measurement process. As any measurement is gathered certain uncertainties are bound to influence the measurements, in our case we have three main uncertainties which are the standard uncertainty, uncertainty due to the resolution of the measuring instrument and the uncertainty from the calibration certificate from the measuring equipment that is used in the measurement process.
The final combined uncertainty is calculated with the standard uncertainty which has a 68% confidence that the true value lies within that range therefore we need to expand the range to obtain a 95% confidence and we achieve this by multiplication of the combined uncertainty with the K = 2 factor. Found in: ključnih besedah Summary of found: ...by calculating the combined uncertainty of the measurement process. As any measurement is gathered certain... Keywords: Metrology, calibration, adjustment, measurement errors, measurement uncertainty, measuring instruments, measuring equipment. Published: 05.01.2023; Views: 538; Downloads: 23
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