1. Intermediate fluence downward terrestrial gamma ray flashes as observed by the Telescope Array Surface DetectorR. U. Abbasi, N. Kieu, P. R. Krehbiel, J. W. Belz, M. M. F. Saba, W. Rison, M. A. Stanley, D. Rodeheffer, D. Mazzucco, Jon Paul Lundquist, 2024, izvirni znanstveni članek Opis: On 11 September 2021, two small thunderstorms developed over the Telescope Array Surface Detector (TASD) that produced an unprecedented number of six downward terrestrial gamma ray flashes (TGFs) within one‐hour timeframe. The TGFs occurred during the initial stage of negative cloud‐to‐ground flashes whose return strokes had increasingly large peak currents up to 223 kA, 147 GeV energy deposit in up to 25 1.2 km‐spaced surface detectors, and intermittent bursts of gamma‐rays with total durations up to 717 s. The analyses are based on observations recorded by the TASD network, complemented by data from a 3D lightning mapping array, broadband VHF interferometer, fast electric field change sensor, high‐speed video camera, and the National Lightning Detection Network. The TGFs of the final two flashes had gamma fluences of and 8, logarithmically bridging the gap between previous TASD and satellite‐based detections. The observations further emphasize the similarity between upward and downward TGF varieties, suggesting a common mechanism for their production. Ključne besede: Telescope Array Surface Detector, terrestrial gamma ray flashes, 3D lightning mapping array, broadband VHF interferometer, fast electric field change sensor, high‐speed video camera, National Lightning Detection Network, TGF fluence measurement Objavljeno v RUNG: 23.04.2025; Ogledov: 124; Prenosov: 0
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4. Demonstrating agreement between radio and fluorescence measurements of the depth of maximum of extensive air showers at the Pierre Auger ObservatoryA. Abdul Halim, Anukriti, Andrej Filipčič, Jon Paul Lundquist, Shima Ujjani Shivashankara, Samo Stanič, Serguei Vorobiov, Danilo Zavrtanik, Marko Zavrtanik, 2024, izvirni znanstveni članek Ključne besede: radio measurement, kozmični žarki ekstremnih energij, observatory Pierre Auger Objavljeno v RUNG: 31.01.2024; Ogledov: 2473; Prenosov: 4
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5. THE CALIBRATION PROCESS OF A MANUFACTURING LINE IN THE AUTOMOTIVE INDUSTRYAleksandar Kuzmanovski, 2022, diplomsko delo Opis: 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. Ključne besede: Metrology, calibration, adjustment, measurement errors, measurement uncertainty, measuring instruments, measuring equipment. Objavljeno v RUNG: 05.01.2023; Ogledov: 2871; Prenosov: 52
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6. Solution-Based Fabrication of Carbon Nanotube Bumps for Flip-Chip InterconnectsXu Pingye, Fei Tong, Virginia Davis, Minseo Park, Michael Hamilton, 2014, izvirni znanstveni članek Ključne besede: Resists, Fabrication, Electrical resistance measurement, Substrates, Dispersion, Resistance, Surface treatment Objavljeno v RUNG: 16.01.2017; Ogledov: 5295; Prenosov: 0 Gradivo ima več datotek! Več... |
7. 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, izvirni znanstveni članek Ključne besede: ZnO, Fabrics, Dip-pad-cure method, Nanorods, Diffuse reflectance, IV measurement Objavljeno v RUNG: 16.01.2017; Ogledov: 5740; Prenosov: 0 Gradivo ima več datotek! Več... |
8. 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, izvirni znanstveni članek Ključne besede: AlGaN/GaN high electron mobility transistor, Depth-resolved ultra-violet spectroscopic photo current-voltage measurement Objavljeno v RUNG: 16.01.2017; Ogledov: 5866; Prenosov: 0 Gradivo ima več datotek! Več... |
9. ASSESSMENT OF EFFECTIVE DOSES BASED ON VARIOUS RADON MEASURING TECHNIQUESNataša Smrekar, 2016, magistrsko delo Opis: 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). Ključne besede: Radon, short-lived radon products, measurement technique, scintillation cell, solid-state nuclear track detector, retrospective detector, equilibrium factor, effective dose, comparison. Objavljeno v RUNG: 28.09.2016; Ogledov: 8061; Prenosov: 293
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