Search Results - "Kwak, Y S"

Hemispheric Asymmetry of the Polar Ionospheric Density Investigated by ESR and JVD Radar Observations and TIEGCM Simulations for the Solar Minimum Period by Kim, E., Jee, G., Wang, W., Kwak, Y.‐S., Shim, J.‐S., Ham, Y.‐B., Kim, Y. H.

“…The ionospheric density displays hemispheric asymmetries in the polar region due to various hemispheric differences, for example, in the offset between…”
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Low-mid latitude D region ionospheric perturbations associated with 22 July 2009 total solar eclipse: Wave-like signatures inferred from VLF observations by Maurya, Ajeet K., Phanikumar, D. V., Singh, Rajesh, Kumar, Sushil, Veenadhari, B., Kwak, Y.-S., Kumar, Abhikesh, Singh, Abhay K., Niranjan Kumar, K.

“…We present first report on the periodic wave‐like signatures (WLS) in the D region ionosphere during 22 July 2009 total solar eclipse using JJI, Japan, very…”
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Leucine-rich Amelogenin Peptides Regulate Mineralization in vitro by Le Norcy, E., Kwak, S.-Y., Wiedemann-Bidlack, F.B., Beniash, E., Yamakoshi, Y., Simmer, J.P., Margolis, H.C.

“…Amelogenin’s capacity to regulate enamel formation is related to its conserved N- and C-terminal domains, its ability to self-assemble, and its ability to…”
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Dependence of the high-latitude lower thermospheric wind vertical vorticity and horizontal divergence on the interplanetary magnetic field by Kwak, Y.-S., Richmond, A. D.

“…We analyze the vertical component of vorticity and the horizontal divergence of the high‐latitude neutral wind field in the lower thermosphere during the…”
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The winter anomaly in the middle-latitude F region during the solar minimum period observed by the Constellation Observing System for Meteorology, Ionosphere, and Climate by Lee, W. K., Kil, H., Kwak, Y.-S., Wu, Q., Cho, S., Park, J. U.

“…The winter anomaly (or seasonal anomaly) at middle latitudes is a phenomenon during which the daytime plasma density at the F‐peak height (NmF2) is greater in…”
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Comparison of the bubble and blob distributions during the solar minimum by Choi, H.-S., Kil, H., Kwak, Y.-S., Park, Y.-D., Cho, K.-S.

“…Plasma blobs, local plasma density enhancements with respect to the background, in low to middle latitudes are understood as byproducts of equatorial plasma…”
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An analysis of the momentum forcing in the high-latitude lower thermosphere by Kwak, Y.-S., Richmond, A. D.

“…We analyze the dynamics of the high‐latitude thermsopheric wind system below 170 km for negative IMF Bz by using a fully nonlinear model with a realistic…”
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A chemogenomic approach to understand the antifungal action of Lichen‐derived vulpinic acid by Kwon, Y., Cha, J., Chiang, J., Tran, G., Giaever, G., Nislow, C., Hur, J.‐S., Kwak, Y.‐S.

“…Aim To determine uncovered antifungal activity of lichen‐derived compound, vulpinic acid, by using chemical‐genetic analyses. Methods and Results…”
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Tunable multilayer assemblies of nanofibrous composite mats as permeable protective materials against chemical warfare agents by Ryu, S.-Y., Chung, J. W., Kwak, S.-Y.

“…Lightweight nanofibrous assemblies with high protection ability against chemical warfare agents (CWAs) were developed using laminated outer and inner layers…”
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Biomimetic Enamel Regeneration Mediated by Leucine-Rich Amelogenin Peptide by Kwak, S.Y., Litman, A., Margolis, H.C., Yamakoshi, Y., Simmer, J.P.

“…We report here a novel biomimetic approach to the regeneration of human enamel. The approach combines the use of inorganic pyrophosphate (PPi) to control the…”
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Antifungal effect of gamma irradiation and sodium dichloroisocyanurate against Penicillium expansum on pears by Jeong, R.‐D., Chu, E.‐H., Shin, E.‐J., Lee, E.‐S., Kwak, Y.‐S., Park, H.‐J.

“…Gamma irradiation (GI) was evaluated for its in vitro and in vivo antifungal activity against Penicillium expansum on pear fruits. GI showed a complete…”
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Persistent longitudinal features in the low-latitude ionosphere by Kil, H., Lee, W. K., Kwak, Y.-S., Oh, S.-J., Paxton, L. J., Zhang, Y.

“…Various longitudinal wave patterns exist in the low‐latitude ionosphere, but the investigation has been limited to the wave number (WN) 3 and 4 patterns. This…”
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Day-to-day variability of equatorial anomaly in GPS-TEC during low solar activity period by Aggarwal, Malini, Joshi, H.P., Iyer, K.N., Kwak, Y.-S., Lee, J.J., Chandra, H., Cho, K.S.

“…The ionospheric total electron content (TEC) in the northern hemispheric equatorial ionization anomaly (EIA) crest region is investigated by using…”
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Dependence of the high-latitude thermospheric densities on the interplanetary magnetic field by Kwak, Y.-S., Richmond, A. D., Deng, Y., Forbes, J. M., Kim, K.-H.

“…The systematic analysis of the interplanetary magnetic field (IMF) By and Bz influences on observed thermospheric density is presented. For this purpose, the…”
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MMP20 Proteolysis of Native Amelogenin Regulates Mineralization In Vitro by Kwak, S.Y., Yamakoshi, Y., Simmer, J.P., Margolis, H.C.

“…Recent studies have shown that native phosphorylated full-length porcine amelogenin (P173) and its predominant cleavage product (P148) can inhibit spontaneous…”
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Response of thermosphere density to changes in interplanetary magnetic field sector polarity by Kwak, Y.-S., Kim, K.-H., Deng, Y., Forbes, J. M.

“…A systematic analysis of the thermospheric density response to changes in the interplanetary magnetic field (IMF) sector polarity is carried out. For this…”
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O and N2 disturbances in the F region during the 20 November 2003 storm seen from TIMED/GUVI by Kil, H., Kwak, Y.-S., Paxton, L. J., Meier, R. R., Zhang, Y.

“…The ratio of height‐integrated atomic oxygen number density, [O], to molecular nitrogen number density, [N2], defined as Σ[O]/[N2], has been used as an…”
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Effect of regular exercise on senile dementia patients by Kwak, Y-S, Um, S-Y, Son, T-G, Kim, D-J

“…Dementia population worldwide is considerable in elderly people. Exercise regulates the brain function, but the mechanism by which it does so is unknown. The…”
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Proteolysis by MMP20 Prevents Aberrant Mineralization in Secretory Enamel by Yamazaki, H., Tran, B., Beniash, E., Kwak, S.Y., Margolis, H.C.

“…The present study was conducted to investigate the role of proteolysis by matrix metalloproteinase 20 (MMP20) in regulating the initial formation of the enamel…”
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Response of the mid-latitude D-region ionosphere to the total solar eclipse of 22 July 2009 studied using VLF signals in South Korean peninsula by Phanikumar, D.V., Kwak, Y.-S., Patra, A.K., Maurya, A.K., Singh, Rajesh, Park, S.-M.

“…•To study the D-region response during July 22 2009 total solar eclipse.•A decrease of ∼6.2dB in VLF signal strength in D-region electron density.•D-region…”
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