Zobrazeno 1 - 10
of 18
pro vyhledávání: '"Gyujun Park"'
Autor:
Sujeong Park, Sei-Sun Hong, Young Eun Kim, Jin-Young Lee, Jaehyung Yu, Gyujun Park, Jaesoo Lim
Publikováno v:
Radiocarbon. 63:139-153
Radiocarbon (14C) dating has been widely used to determine the age of deposits, but there have been frequent reports of inconsistencies in age among different dating materials. In this study, we performed radiocarbon dating on a total of 33 samples f
Publikováno v:
Radiocarbon. 62:1285-1298
The 14C peak in AD 775 (M12) has been measured and confirmed globally in several studies since it was first measured in annual tree rings by Miyake et al. (2012). However, M12 data measurements in early- and latewood are limited. This paper presents
Autor:
Mitsuhiro Kuwahata, Tatsuhiko Yamaguchi, Toshimichi Nakanishi, Gyujun Park, Wan Hong, Jung-Hun Park, Ken'ichi Ohkushi, Shoichi Shimoyama, Shinji Sugiyama, Futoshi Nanayama
Publikováno v:
Radiocarbon. 61:1939-1950
To investigate the relationship between paleoenvironmental changes and marine reservoir effects, the radiocarbon ages of marine bioclasts and terrestrial plants from the same horizons of a sediment core in the Holocene Epoch were measured. This core,
Autor:
Toshimichi Nakanishi, Gyujun Park, Wan Hong, Jong-Geol Lee, Shin'ichi Sato, Shoichi Shimoyama
Publikováno v:
Radiocarbon. 59:423-434
To measure chronological changes in the marine reservoir effect in western Japan, 47 marine shells and 35 terrestrial plants from the same horizons in two cores of Holocene sediments were radiocarbon dated by the KIGAM AMS facility. These cores were
Autor:
Toshimichi Nakanishi, Jong-Geol Lee, Hyo-Seok Park, Xiaomei Xu, Gyujun Park, Wan Hong, Jung Hun Park, Kilho Sung, Ki Suk Sung
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 361:609-613
Δ 14 C values of leaves of a deciduous tree record to those of atmospheric CO 2 within error and were used to map out Δ 14 C distribution in Korea. We collected ginkgo ( Ginkgo biloba Linnaeus , a deciduous tree) leaf samples in mid-June to early J
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 361:586-590
A 1 MV AMS was installed at KIGAM (Korea Institute of Geoscience and Mineral Resources) in 2007. We usually measure 14C at charge state 2+ because beam transmission yield reaches maximum value at a terminal voltage of 950 kV. However, this condition
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 361:580-585
The fabrication year of a set of movable metal types that were thought to be used for printing “Jeungdoga” was investigated. Since the types were made from bronze and did not contain carbon, an organic black ink called “meog” was collected fr
Autor:
Xiu-Jing Lin1 lxj@kebi.com, Gyujun Park1, Ji-Hun Kwak1, Wan Kim1, Hee-Dong Kang1, Hung-Lak Lee2, Young-Gyu Kim3, Sih-Hong Doh4, Do-Sung Kim5, Chang-Kyu Kim6
Publikováno v:
Journal of Radioanalytical & Nuclear Chemistry. Apr2006, Vol. 268 Issue 1, p103-108. 6p. 1 Diagram, 1 Chart, 3 Graphs.
Publikováno v:
Radiocarbon. 55:748-752
The Kawagodaira Volcano is located on the northwest slope of Amagi Volcano on the Izu Peninsula of central Japan. The fine pumice that erupted from Kawagodaira Volcano is widely distributed in the central and western parts of the Japanese mainland. H
Publikováno v:
Radiocarbon. 55:593-598
Various carbon structures, including carbon nanofilament (CNF), single-wall carbon nanotube (SWCNT), multi-wall carbon nanotube (MWCNT), and pyrolytic graphite sheet (PGS), were exposed in air to determine how they vary according to carbon structure