• Korean Journal of Plant Resources
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• v.28 no.2
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• pp.193-216
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• 2015

This study was carried out to investigate the vascular plants of Mt. Bohyeon (Gyeongbuk). The vascular plants were collected 22 times and summarized as 589 taxa, including 105 families, 327 genera, 522 species, 11 subspecies, 48 varieties and 8 forms respectively. Among them, 13 Korean endemics, 10 red list of vascular plants, 2 endangered plants and 83 specially designated plants by the Ministry of Environment were included respectively. The naturalized plants were 37 taxa and the naturalized ratio was 6.41 of 589 taxa. Usage of 589 taxa were consists of 240 taxa (40.1%) of edible plants, 205 taxa (34.2%) of medicinal plants, 62 taxa (10.3%) of ornamental plants, 213 taxa (35.6%) of pasture plants, 15 taxa (2.5%) of timber plants, 8 taxa (1.3%) of fiberplants, and 3 taxa (0.5%) of industrial plants.

• Journal of the Korean Society of Marine Environment & Safety
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• v.27 no.5
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• pp.618-629
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• 2021

The Fukushima nuclear power plant (NPP) accident caused by the East Japan Earthquake in 2011 and the recent increase in the frequency of earthquakes in Korea have caused safety concerns regarding radionuclide exposure. In addition, the Tokyo Electric Power Company (TEPCO) in Japan recently decided to release radionuclide-contaminated water from Fukushima's NPP into the Pacific Ocean, raising public concerns that the possibility of radionuclide contamination through both domestic- and foreign fishery products is increasing. Although many studies have been conducted on the input of artificial radionuclides into the Pacific after the Fukushima NPP accident, studies on the distribution and accumulation of artificial radionuclides in marine products from East Asia are lacking. Therefore, in this study, we attempted to explore recent research on the distribution of artificial radionuclides (e.g., ¹³⁷Cs, ^239+240Pu, ⁹⁰Sr, and etc.) in marine products from Korean seas after the Fukushima NPP accident. In addition, we also discuss future research directions as it is necessary to prepare for likely radiation accidents in the future around Korea associated with the new nuclear facilities planned by 2030 in China and owing to the discharge of radionuclide-contaminated water from the Fukushima NPP.

• Journal of Radiation Industry
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• v.12 no.4
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• pp.311-316
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• 2018

Average life expectancy is getting longer due to medical developments and improvements in living standards. So much so that the elderly have an increased risk of developing osteoporosis. Therefore, it is important to prevent, diagnose, and treat the senile disease at an early stage through a bone density test. Bone density is measured by dual energy X-ray absorption (DXA). In this study, while using DXA, in cases when the measurements for both the lumbar and the femur could not be taken simultaneously, the correlation between both measurements were known, and the measurement of one area was used to make a clinical inference for the value of the other. Measurements were taken using Lunar Prodigy Advance (GE) for 43 participant with clinically significant fractures. Statistical calculations were produced and analysed regarding bone density. In case of T-score, lumbar spine produced a statistical result of $-2.112{\pm}1.836$ and femur neck was $-1.716{\pm}1.565$. In case of Z-score lumbar spine produced a statistical result of $-0.151{\pm}1.513$, and femur neck $-0.026{\pm}1.283$. It is indicated that the pearson correlation coefficient of T-score between lumbar spine and femur neck is high at 0.699, and the pearson correlation coefficient of Z-score is considered relatively high at 0.503. The correlation of bone density between lumbar spine and femur neck is shown to be statistically meaningful in T-score's p-value at 0.000 and Z-score's p-value at 0.001. In conclusion, it seems to have clinical usefulness that we can infer the result of one measurement through that of the other part tested, based on the knowledge of the correlation coefficients between lumbar spine and femur neck.

• Korean Journal of Heritage: History & Science
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• v.44 no.3
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• pp.78-91
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• 2011

The Usuki Stone Buddha Statues in Japan are carved on mainly dark gray welded lapilli tuff accompanied by lenticular fiamme. This rock is composed of matrix which contains feldspar and opaque minerals with some phenocrysts of quartz and feldspar. The matrix is slight to highly welded. The statues have been weathered and weakened by salt and freezing of water. To enhance the mechanical properties of the rock, consolidants and water repellents were applied. The absorption ratio of the rock was highly decreased after the treatment of the water repellents, the consolidant OH 100, as well. Ultrasonic velocity revealed similarly higher values in the treated rock by KSE 300 and OH 100, compared to non-treated rock. KSE 300, especially, highly increased the Equotip surface hardness. All studied consolidants and water repellents were found to change the original color of the stone. SNL, specifically, resulted the significant change in color. In addition, KSE 300 were observed to improve resistance to weathering such as microcrack and fracture through freezing-thawing test after treatment.

• Journal of the Architectural Institute of Korea Planning & Design
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• v.34 no.3
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• pp.85-92
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• 2018

The purposes of this study are to analyze the spatial composition of the outer garden of Soswaewon that appears in Gyeong-Ji Yang's "30 Poems of Soswaewon" and examine its significance and symbols. These poems by Gyeong-Ji Yang are important historical records that portray the appearance of Soswaewon and the space outside it at the end of the 17th century. Unlike "48 Poems of Soswaewon" or "Soswaewondo," these poems arenot limited to Soswaewon and its surroundings; theyalso include areas from the village entrance upwardto the peak of the mountain behind the village. These poems can be divided into three main parts. Jiseok-ri and Changam-dong in poems 1 and 2 provide first impressions of the village in which the main Soswaewon garden is located, whereas poems 3 to 8 and poems 10 to 12 describe the space inside Soswaewon. Poems 13 to 30 depict the beautiful scenery around the outer garden of Soswaewon. In general, about 30% of the compilation in "30 Poems of Soswaewon" celebrates the inner Soswaewon, and the remaining 70% depicts the scenery around Soswaewon (i.e., views of the outer garden). It is presumed that Gyeong-Ji Yang employed this structure to achieve some type of order. Between the "48 Poems of Soswaewon" - also describing Soswaewon - and "Soswaewondo," which is a woodprint drawing of Soswaewon, "30 Poems of Soswaewon" offers the widest coverage of Soswaewon. Compared to "48 Poems of Soswaewon," which addresses the scene inside Soswaewon, new buildings such as the Jaeweoldang, Buhweondang, and Hancheonsa appear in "30 Poems of Soswaewon." Thus, the latter covers a much wider range. Chimgye Munbang - Gwangpunggak, Yangdandongo - Aeyangdang, Byeongseogjuggeun - Jajukchong, etc. are mentioned in both compilations. The use of a wide range of natural objects in these 30 poems, including mountains, birds, and the sky (instead of trees and flowers), shows that the author perceived Soswaewon as an area with a much higher and wider view than that of a typical living space. Moreover, natural regression ideologies, or seclusion ideologies, are evident.

• Economic and Environmental Geology
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• v.54 no.1
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• pp.151-160
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• 2021

2:1 clay minerals such as smectite incorporating ammonium were extracted to investigate the ammonium behavior and nitrogen isotope characteristics for two different sediment cores which were collected from shimmering sites on seafloor of the Wakamiko crater, southwestern Japan. Inorganic nitrogen contents in clay fraction were estimated by calibration curve based on consistently decreasing carbon and nitrogen ratio during the treatment to decompose organic materials, after removing inorganic carbon. The results show that the proportions of inorganic nitrogen for total nitrogen in clay fraction of SWS site(Core#1094MR: av. 18.2%) are higher than those in SES site(Core#1093MG: av. 11.5%). Relatively good crystallinity of the former suggests that exchangeable ammonium was transformed to non-exchangeable ammonium during more evolving diagenetic process. Nitrogen isotope variance of clay fraction(SES site: Core#1093MG: -4.4 ~ +0.2 ‰, av. -2.4 ‰; SWS site: Core#1094MR: -0.7 ~ +3.0 ‰, av. +1.5 ‰) during sequential decomposition of exchangeable ammonium suggests that heat flow derived from deep magma led to nitrogen isotope fractionation between dissolved ammonium and ammonia in the fluids involved in the formation of 2:1 clay mineral incorporating ammonium with local temperature variation.

• The Journal of the Convergence on Culture Technology
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• v.8 no.4
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• pp.219-225
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• 2022

1950-meter-tall goddess is Seolmundae Grandmother with the head of the 1950m Hallasan Mountain Baengnokdam and the body of the mountain ridgeline. Seolmundae Grandmother in Jeju is a folk belief that has been passed down from generation to generation in Jeju. Unlike inland, Seolmundae Grandmother, which had femininity in the customs of Jeju, which was a matrilineal society, developed into an absolute faith in Jeju, metaphorizing that in some way it was inevitable. Seolmundae Grandmother was the only subject that could mentally solve the biggest problem for Jeju residents, even if they were disconnected from the mainland. In other words, Seolmundae Grandmother was unable to make underwear for Seolmundae Grandmother because it was short of 100 bottles of silk, the god of Hallasan, a huge being and a physical symbol. Therefore, Semyungju Grandmother gave up the bridge connecting the mainland and Jeju. In this paper, focusing on the fact that Mt. Halla, covered with snow in winter, is like a skein of silk thread that we usually use in our daily lives, the etymology of Seolmundae has been changed to Saengmyeongju, - Semyungju, which is a skein of fine silk. As a basis for this, there is a custom of tying a thread of silk in 'Semyungju', a shrine to Semyeongju in Halmangdang, 'Hanmosal' along the coast of Pyoseon-myeon. The silk thread is the core of the Packing DNA gene. The summit of Mt. Halla, Ninety-Nine Valleys, and five hundred generals, found in Seolmundae Grandmother or White Silk, expressed the symbols of Jeju. The Packing DNA gene was found to originate in the Jeongnang

• Journal of Family Resource Management and Policy Review
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• v.26 no.3
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• pp.87-106
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• 2022

This study compared working arrangements, interest in rural migration, and life satisfaction in Japan in two periods: immediately after the COVID-19 (2019 coronavirus disease) pandemic and two years after the global outbreak. The comparison was based on data from the "Survey on Changes in Attitudes and Behaviors in Daily Life under the Influence of Novel Coronavirus Infection, 2020, 2021", which was conducted four times by the Japanese Cabinet Office directly after the COVID crisis (May 2020 and September 2021). The respondents who participated in both the first and fourth surveys were employed individuals aged 20 years or older. The results are as follows. First, the proportion of Tokyo residents engaging in telework immediately after the COVID-19 pandemic was 36.1%, which is higher than the levels observed nationwide. Second, individuals involved in telework and those working under flexible arrangements were more highly interested in moving to rural areas than those who commute to work. Third, among people engaged in telework, life satisfaction diminished immediately after the COVID-19 pandemic compared with the period before this crisis. After two years of the pandemic, however, life satisfaction among this group improved. Changes in working arrangements due to the pandemic can be expected to promote migration, as well as help revitalize regions and encourage the discovery of new lifestyles.

• Journal of the Korea institute for structural maintenance and inspection
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• v.27 no.1
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• pp.71-77
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• 2023

This study aims to investigate the structural performance of hollow-core slab (HCS) memebers with 400 mm thickness. To this end, a total of four HCS specimens were fabricated based on the individual mold method to provide shear reinforcement, unlike the extrusion method. The key variables were chosen as the presence of topping concrete, core-filling concrete, and shear reinforcements. The crack patterns and load-displacement responses of the test specimens were analyzed in detail. Test results showed that inclined shear cracking occurred all the specimens, and that the specimen with shear reinforcement on the web of HCS unit had higher strength and ductility than the specimen without shear reinforcement. In particular, shear reinforcements placed on the web of HCS unit effectively resisted not only to vertical shear force but also to horizontal shear force between the interface of HCS unit and topping concrete. In addition, it was discovered that the method in which shear reinforcements are placed on the web of HCS unit is more effective in improving structural performance than core-filling method.

• Journal of Nutrition and Health
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• v.56 no.4
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• pp.391-403
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• 2023

Purpose: This study evaluated the validity of a physical activity classification table (PACT) based on total energy expenditure (TEE) and physical activity level (PAL) measured using the doubly labeled water (DLW) method in Korean adults and the elderly. Methods: A total of 141 (male 70, female 71) adults and elderly were included. The reference standards TEE_DLW, PAL_DLW were measured over a 14-day period using DLW. A 24-hour physical activity diary was kept for three days (two days during the week and one day on the weekend). PAL_PACT was calculated by classifying the activity type and intensity using the PACT. PAL_PACT was multiplied by resting energy expenditure measured by indirect calorimetry to estimate TEE_PACT. Results: The mean age of the study participants was 50.5 ± 18.8 years, and the mean body mass index was 23.4 ± 3.3 kg/m². A comparison of TEE_DLW and TEE_PACT by sex and age showed no significant differences. The bias, the difference between TEE_DLW and TEE_PACT, was male 17.3 kcal/day and female -4.5 kcal/day. The percentage of accurate predictions (values within ± 10% of the TEE_DLW) of TEE_PACT was 58.6% in males and 54.9% in females, with the highest prediction values in the age group 40-64 years (70.9%) in males and over 65 years (73.9%) in females. The spearman correlation coefficient (r) between TEE_PACT and TEE_DLW was 0.769, indicating a significant positive correlation (p < 0.001). Conclusion: In this study, the use of a new PACT for calculating TEE and PAL was evaluated as valid. A web version of the software program and a smartphone application need to be developed using PACT to make it easier to apply for research purposes.