• MISULJARYO - National Museum of Korea Art Journal
• /
• v.101
• /
• pp.48-65
• /
• 2022

Three Japanese Buddhist scuptures of Daehyusa temple in Gimcheon, Gyeongsangbuk-do province(慶尙北道) are enshrined in the main hall(本堂) of Henjoin temple in Daegu, an annex temple built by the Chisan School(智山派) of Shingi Shingon sect(新義眞言宗) in Daegu around 1910 when the Japanese colonial period began. The following statues are believed to have been made around this time: the Statue of Kobo daishi(弘法大師像), which is the figure of monk Kukai(空海, 774-835), the founder of the Shingon sect(眞言宗) of Japan, and the Statue of Dainichi nyorai(大日如來像) and the Statue of Fudo myo-o(不動明王像), which are notable sculptures representing the thought and belief of the Shingon sect. Most statues identified of Dainichi nyorai, Kobo daishi, and Fudo myo-o from the Japanese colonial period thus far are rock-carved statues or stone statues. The statues of Daehyusa temple are noteworthy in that they are the first discovered Japanese Buddhist sculptures made of wood, known to have been enshrined in Japanese temples. Furthermore, they are valuable sources that can provide clues to the religious atmosphere of the temples of Chisan School of Shingi Shingon sect at the time. Although these statues have formative features that partially reflect modern aesthetics, their iconographic origins date back to the Heian period(平安時代, 794-1185). In other words, the Statue of Dainichi nyorai inherits the religious tradition of the Statue of Dainichi nyorai, which was created by monk Kakuban(覺鑁, 1095-1143), the founder of the Shingi Shingon sect. The Statue of Kobo daishi follows the Shinnyo Shinno(眞如親王) style founded by Monk-Imperial Prince Shinnyo who was a disciple of monk Kukai. The Statue of Fudo myo-o manifests the Genjo(玄祖) style among the statues of Fudo myo-o. Although not much is known about how the statues were enshrined in the Henjoin temple in Daegu during the Japanese colonial period, it is very likely that these statues were created as Shingi Shingon sect's statue of three-wheeled body(三輪身). That is, it is estimated that the Statue of Dainichi nyorai, Statue of Kobo daishi, and Statue of Fudo myo-o have the characteristics of the body of self-nature chakra(自性輪身), the body of great dharma chakra(正法輪身), and the body of order chakra(敎令輪身), respectively. The fact that the statue of three-wheeled body was established in the Shingon sect in Japan by monk Kakuban also lends credence to this possibility. It is thought that people who came to the Henjoin temple in Daegu worshiped the statue of three-wheeled body to understand the teachings of the Dainichi nyorai. Although it is the case of Sildalsa Temple (悉達寺, the successor of Henjoin temple in Daegu) in the first half of the 1950s, the main hall includes features that reinforce the idea that the tradition of Kobo daisi faith(弘法大師信仰) is passed on. To illustrate, the human skeletal remains in the main hall of Sildalsa Temple reflect Koyasan(高野山)'s tradition in laying ashes to rest, which has been popular in conjunction with the Kobo daishi faith in Japan since the 11th century.

• Journal of the Korean Magnetics Society
• /
• v.19 no.5
• /
• pp.180-185
• /
• 2009

Fe$_3$O$_4$ particles, prepared by a sol-gel method, were examined for their structural characteristic, particle shapes and sizes, and their magnetic properties. Two different chemical compositions (using a mol rate Fe$^{2+}$/Fe$^{3+}$ = 1/2 and only Fe$^{2+}$) and 2-methoxyethanol were used for making proper solutions. And the solutions were refluxed and dry in a dry oven and the samples were fired at 200$\sim$600$^{\circ}C$ in the N$_2$ atmosphere. The formation of single-phased spinel ferrite powders was identified with the X-ray diffraction measurement as they were fired at above 250$^{\circ}C$. The result of scanning electron microscopy measurement showed the increase of annealing temperature yielded the particle size increased. The magnetic transition was observed using the Mossbaur spectroscopy measurement. As the ferrite, prepared with the chemical composition (Fe$^{2+}$/Fe$^{3+}$ = 1/2), was fired at 250$^{\circ}C$, 78% of the ferrite had a ferrimagnetic property and 22% of the ferrite was non-magnetic. In case of preparing the sample with only Fe$^{2+}$ and annealed at 200$^{\circ}C$, it had a single phased spinel structure but its particle size was too small to be ferrimagnetic. The annealing temperature above 250$^{\circ}C$ made powders a spinel structure regardless of the preparation method. They had a typical soft magnetic property and their saturation magnetization and coercivity became larger as the annealing temperature increased.

• Journal of Radiation Protection and Research
• /
• v.39 no.1
• /
• pp.21-29
• /
• 2014

A new cold neutron triple-axis spectrometer (Cold-TAS) was recently constructed at the 30 MWth research reactor, HANARO. The spectrometer, which is composed of neutron optical components and radiation shield, required a redesign of the segmented monochromator shield due to the lack of adequate support of its weight. To shed some weight, lowering the height of the segmented shield was suggested while adding more radiation shield to the top cover of the monochromator chamber. To investigate the radiological effect of such change, we performed MCNPX simulations of a few different configurations of the Cold-TAS monochromator shield and obtained neutron and photon intensities at 5 reference points just outside the shield. Reducing the 35% of the height of the segmented shield and locating lead 10 cm from the bottom of the top cover made of polyethylene was shown to perform just as well as the original configuration as radiation shield excepting gamma flux at two points. Using gamma map by MCNPX, it was checked that is distribution of gamma. Increased flux had direction to the top and it had longer distance from top of segmented shield. However, because of reducing the 35% of the height, height of dissipated gamma was lower than original geometry. Reducing the 35% of the height of the segmented shield and locating lead 10cm from the bottom of the top cover was selected. After changing geometry, radiation dose was measured by TLD for confirming tester's safety at any condition. Neutron(0.21 ${\mu}Svhr^{-1}$) and gamma(3.69 ${\mu}Svhr^{-1}$) radiation dose were satisfied standard(6.25 ${\mu}Svhr^{-1}$).

• Applied Microscopy
• /
• v.30 no.1
• /
• pp.45-59
• /
• 2000

Cis-platin is a widely used anticancer drug against certain solid tumors such as malignant ovarian tumor, malignant carcinoma of head and neck, bladder cancer and cervical cancer of uterus, and its major mechanism of action is inhibition of DNA synthesis of the tumor cell. To investigate the inhibitory effects of cis-platin on the ciliogensis of the ciliated cells in the mucosa of oviduct, the author pursued the alterations of $\alpha-tubulin$, which is the main constituent of the microtubles in cilia, after cis-platin treatment. To eliminate the possible variations due to ovarian cycle, female Spargue-Dawley rats ($150\sim200gm$ in B.W.) were pretreated with estradiol benzoate (20 mg/kg, once a day, for 4 consecutive days). Animals were administrated with cis-platin (6 mg/kg, i.p.) and sacrificed at 1day, 3days, 5days and 7days after treatment, respectively. Immunohistochemistry for $\alpha-tubulin$ using mouse anti-rat $\alpha-tubulin$ monoclonal antibody as primary antibody was done. Immunogold electronmicroscopy for intracellular distributions of $\alpha-tubulin$ was also performed with same primary antibody and Goat anti- mouse IgM which is preconjugated with gold particles of 15 nm as secondary antibody. The results obtained were as follows; 1. Strong immunoreactivity of $\alpha-tubulin$ was observed in ciliated cells of oviducts at 1, 3 and 5 days after estradiol pretreatment. 2. Weak immunoreactivity of $\alpha-tubulin$ was observed in ciliated cells of oviducts at 1 and 3 days after cis-platin treatment but it was recovered to strong immunoreactivity in 5 days 3. In immunogold electronmicroscopy, density of gold particles for $\alpha-tubulin$ reactions was decreased in apical cytoplasm, but few changes were observed in basal body or cilia at 1 and 3 days after cis-platin treatment. From these above results, it is indicated that synthesis of $\alpha-tubulin$ in ciliated cells of rat oviduct is inhibited by cis-platin treatment.

• Journal of the Korean Magnetics Society
• /
• v.19 no.3
• /
• pp.89-93
• /
• 2009

Amorphous $Ge_{1-x}Mn_x$ semiconductor thin films grown by low temperature vapor deposition were annealed, and their electrical and magnetic properties have been studied. The amorphous thin films were $1,000{\sim}5,000\;{\AA}$ thick. Amorphous $Ge_{1-x}Mn_x$ thin films were annealed at $300^{\circ}C$, $400^{\circ}C$, $500^{\circ}C$, $600^{\circ}C$ and $700^{\circ}C$ for 3 minutes in high vacuum chamber. X-ray diffraction analysis reveals that as-grown $Ge_{1-x}Mn_x$ semiconductor thin films are amorphous and are crystallized by annealing. Crystallization temperature of amorphous $Ge_{1-x}Mn_x$ semiconductor thin films varies with Mn concentration. Amorphous $Ge_{1-x}Mn_x$ thin films have p-type carriers and the carrier type is not changed during annealing, but the electrical resistivity increases with annealing temperature. Magnetization characteristics show that the as-grown amorphous $Ge_{1-x}Mn_x$ thin films are ferromagnetic and the Curie temperatures are around 130 K. Curie temperature and saturation magnetization of annealed $Ge_{1-x}Mn_x$ thin films increase with annealing temperature. Magnetization behavior and X-ray analysis implies that formation of ferromagnetic $Ge_3Mn_5$ phase causes the change of magnetic and electrical properties of annealed $Ge_{1-x}Mn_x$ thin films.

• Journal of Ginseng Culture
• /
• v.3
• /
• pp.11-37
• /
• 2021

Korean ginseng is the one of the most famous medicinal herbs globally and has long been a representative item of East Asian trade, including across China and Japan. Since Joseon (1392-1910) ginseng trade was entirely controlled by the state, The Veritable Records of the Joseon Dynasty are a valuable resource that can shed light on the history of the ginseng industry at that time. By studying the subsection "The Veritable Records of King Sejong" (世宗實錄), when ginseng was used even more widely, we assess the purpose and scale of its trade in the 15th century, identify its original listing in the geographical appendix, develop a distribution map, and explore similarities to current ginseng cultivation areas. During the reign of King Sejong (1418-1450), ginseng was sent to China as a tribute 101 times, with a combined weight of 7,060 kilograms, with less than one-third of that amount given to Japan and Okinawa. It was used to cover the travel expenses of foreign envoys and servants, but this can be seen to gradually decrease after the regnal mid-term, primarily due to a decrease in the amount of ginseng being collected. At the time, there were 113 areas of naturally growing ginseng as listed in the records' geographical appendix, including 12 recorded in the 'tributes' category: Yeongdeok-gun, Yeongju, and Cheongsong-gun in Gyeongsangbuk-do; Ulju-gun and Ulsan in Gyeongsangnam-do; Jeongeup, Wanju-gun, and Jangsu-gun in Jeollabuk-do; Hwasun-gun in Jeollanam-do; Goksan-gun and Sinpyeong-gun in Hwanghaebuk-do; Jeongju and Taecheon-gun in Pyeonganbuk-do; and Jaseong-gun and Junggang-gun in Jagang-do. A total of 101 places are recorded in the 'medicinal herbs' category, located throughout the mountains of the eight Joseon provinces, except the islands. In comparison with current ginseng cultivation sites, many of these historical areas are either consistent with or adjacent to contemporary locations. The geographical appendix to "The Veritable Records of King Sejong" was compiled in the early days of the king's reign (1432) when there was a lot of wild ginseng. The appendix is a valuable resource that indicates the possibility of growing ginseng on the Korean Peninsula in the future. The apparently natural habitats in the south, where ginseng is not currently cultivated, could be candidates for the future. Moreover, areas in the north where ginseng has not been grown, except Kaesǒng, could be a good alternative under sustainable inter-Korean exchange should cultivation sites move north due to climate warming.