Empirical Formulas for Estimating Self and Mutual Inductances of Toroidal Field Coils and Structures
PLASMA AND FUSION RESEARCH
Authors: Itoh, Yasuyuki; Utoh, Hiroyasu; Sakamoto, Yoshiteru; Hiwatari, Ryoji
Abstract
Self and mutual inductances of toroidal-field (TF) coils are empirically expressed by linear combinations of three coil-shape parameters: elongation, aspect ratio, and triangularity, based on their calculation results with the Neumann formula. A regression function was also obtained for calculating rough values of self-inductances of toroidal-shape structures such as a vacuum vessel in a Tokamak-type fusion reactor. An analysis for their eddy currents induced during fast discharge of TF coils is presented for showing as an application example of these formulas. (C) 2020 The Japan Society of Plasma Science and Nuclear Fusion Research
BIOCHEMICAL AND QUALITY PARAMETERS OF BTRI RELEASED TEA CLONES
BANGLADESH JOURNAL OF BOTANY
Authors: Yasin, M.; Ara, R.; Mamun, M. S. A.; Hoque, M. M.
Abstract
The quantity of antioxidant, flavanols, flavonoids, polyphenols, and catechins biochemical compounds varies among the clones and varieties. Biochemical parameters of green leaves and made tea were analyzed with standard methods using UV-visible spectrophotometer. Different biochemical and quality parameters varied markedly (p < 0.05) among the test clones. Moisture per cent (3.0 and 2.73), polyphenol (78.52 and 84.44 ppm), caffeine (68.28 and 70.3 ppm), antioxidant activity (96.4 and 97.39), theaflavin and thearubigin (ratio of TF and TR conc.; 9.99 and 9.99) contents were optimum in BT2 and BT4 clones.