• Journal of the Korean Society of Food Culture
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• v.2 no.1
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• pp.81-92
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• 1987

This treatise deals with chronic state of famine and exploitation of famine relief food in the later half of Chosun Period and especially in relation with socio-economic changes. There with the impact of socio-economic factors on the chronic state of famine and exploitation of famine relief food is studied mainly with a literary approach. The influential factors which lead to the chronic state of famine were not only climatic restrictions such as flood and drought but socio-economic factors such as foreign invasion (Japanease invasion and Ching's invasion), frequent breaking out of revolt and technological development of agriculture (rice transplantation). And disorder of land system and cultivation of cash crops by the richer peasantry, lowering the economic status of the poorer peasantry who were a major constituents of the population, aggravated the famine state. Because the poorer peasantry were under the shortage of food, they had to seek something edible in the fields and mountains. In this process various kinds of famine relief foods were exploited by the poorer peasantry. The majority of famine relief foods were wild vegetables. Consequently the Chronic state of famine was a cause to introduce various edible wild vegetables into Korean food, which influenced modern vegetarian food habits and firmed the Korean's favorite taste to be hot and salty. These wild vegetables couldn't have a marvelous effect on the relief of starved people. Potatoes and sweet potatoes, which were newly introduced foreign crops, were encouraged to be cultivated for famine relief. But these tubers, unable to be staple food, didn't contribute to an increase in population.

• Journal of The Geomorphological Association of Korea
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• v.15 no.2
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• pp.95-109
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• 2008

This work is to describe the geomorphological features of Dongcheon-gugok in the Eastern Part of Gyeongsang Province, and attempt to develop a basic data for traditional natural heritage. The bedrocks of the study area is typically sedimentary rocks of Gyeongsang Series. Dongcheon-gugok in the study area is almost distributed in the valley of Taebaek Mountain range in Gyeongbuk Province. These valleys almost belong to tributaries of Nakdong River, and are characterized by narrow meandering valley in the moutainous region. Dongcheon-gugok in the study area is located in these valleys with steep slopes or rocky cliffs. And there are pools, point-bar with sands and gravels, riffles, etc in the river valley. Ancesters named these landscape with Jeolbyuk(rocky cliff), Bong(peak), Dam(pool), Tan(ripple), Cheonsa(point-bar), Pok(waterfall), Dae(hill), etc.

• Journal of The Geomorphological Association of Korea
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• v.19 no.4
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• pp.123-137
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• 2012

Reddish superficial materials in southern area of Korean Peninsula have been defined as lateritic red soil in Korea. In A-CN-K ternary plots, CaO and $Na_2O$ show similar linear distribution along a A-K line to kaolinite profile and laterite in southern Spain and Cameroon, respectively, and it means strong alteration. But $K_2O$ is weak alteration, plotting between muscovite and illite zone. Granitic reddish weathering mantles in study area show bulk distribution in center when plotted in A-CNK-Fm space, in contrast to laterite in Cameroon, plotting linearly in the middle along a A-FM line. Therefore, alteration of reddish saprolites in Southern Korea have not progressed as much as laterite. To define Reddish saprolite in southern Korean Peninsula as a lateritic red soil, more many studies are necessary.

• Journal of The Geomorphological Association of Korea
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• v.21 no.4
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• pp.97-108
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• 2014

Naesung stream famous for 'sandy river', a tributary to the Nakdong River, flows through Yeongju-Bonghwa Basin, its drainage. If the dismantlement of granitic hills in basin is in final stage, weathering materials from hills into stream are finer materials like silty or sandy loam than coarse sand, because sand as weathering mantles is provided from granitic hills, in general. So the granitic hills in Yeongju-Bonghwa basin is dissecting present. As a results of the CIA analysis(A-CN-K and A-CNK-FM ternary diagram), chemical weathering of granitic grus in Yeongju-Bonghwa basin is too very weak for calcium and sodium to be dissolved and go as far as to be more weak than that of Jeongeup, Nonsan and Namwon, common granitic grus in Korean Peninsula. Therefore, the chemical characteristics of granitic hills in Yeongju-Bonghwa basin show that the alteration of weathering mantles just finished disintegration and is dissected at a standstill. Plenty of sands provided from granitic hills is filling the channel of Naesung stream.

• Journal of The Geomorphological Association of Korea
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• v.19 no.4
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• pp.73-81
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• 2012

This study analyzed and examined the entries of natural disasters recorded in Samguk-sagi in relation to the natural thoughts. In the ancient Korean view of nature thought the Unified Shilla dynasty surveyed their view on nature in terms of terrestrial upheavals. In the first place, I came to know that the important natural disasters such as droughts, floods, hails, locusts, earthquakes, thunderstroke, storms uprooting trees, tornado etc. recorded in Samguk-sagi have something in common with the entries of natural disasters in the ancient Chinese histories. Accordingly, they interpreted natural disasters in terms of good omens and heavenly punishments. The king refrained from luxurious food and drink, released prisoners or reduced their sentence as a sign of his benevolence. They thought that natural disasters were caused by the heavenly instruction due to lack of virtue on the part of the king. I think that these were acts of ritual on the part of the king as a ruler to fulfill his responsibility for a benevolent administration.

• Journal of The Geomorphological Association of Korea
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• v.20 no.1
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• pp.57-74
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• 2013

Coastal terrace was developed at 8.3m height near Waon village in Suncheon-si. Due to the sandgravel layer deposited in a different today's environments, rounded gravel(4.3m, 5.8m, 6.3m) sequentially in a cross-section of coastal terrace, so it provides a good example which understand Holocene sea level changes to determine the effect on the various climatic-environments traits. For the purpose of identifying the morphogenetic process, Profile description, Grain size, XRD, Thin section analysis was attempted. As a result, coastal terrace are more likely to have been formed by the more recent period rather than the last interglacial(MIS 5 period), and at that time, various pedological features are considered to be formed.

• Proceedings of the Korea Water Resources Association Conference
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• 2019.05a
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• pp.369-369
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• 2019

최근 전 세계적 기상이변으로 홍수 가뭄 폭설 혹서 혹한 등의 재해 때문에 많은 사람들이 고통에 시달리고 있다. 기상이변으로 인한 재해는 과거에도 존재하였으며 한민족의 역사와 함께하였다. 온고이지신가 이위사의(溫故而知新可以爲師矣)는 논어의 위정편(爲政編)에 나오는 공자의 말씀이다. '옛 것을 익혀 새것을 알면 남의 스승이 될 수 있다'라는 뜻으로 재난을 연구하는 연구자의 입장에서 보면 반드시 새겨둘 구절이다. 역사 속에서 자연재해는 군주(君主)의 부덕(不德)이나 실정(失政)의 소치(所致)로 여겨지고 나아가서는 왕조나 국운의 쇠퇴와도 관련이 이어지기까지 했다. 이미 과거 자연기록에 있었던 일들이며 이러한 사실은 세계문화유산으로 지정된 "조선왕조실록"을 통해 조선시대의 자연재해 기록을 살펴볼 수 있다. "조선왕조실록"을 보면 경술년 현종 11년(1670년 5월 2일) "가없는 우리백성들이 무슨 죄가 있단 말인가. 아, 허물은 나에게 있는데, 어째서 재앙은 백성에게 내린단 말인가." 1671년 말 경신대기근으로 인한 사망자 수가 100만 명에 이른다고 기록도 있다. 기양의례'란 가뭄, 홍수, 전염병 같은 자연재해만이 아니라 개인의 질병과 불행 등 일상적인 삶의 조건을 위협하는 상황이 닥쳤을 때 이를 소멸하고자 거행하는 대표적인 재난문화의 종류이며 비정기적 의례를 의미한다. 조선시대에 기양의례는 재난대응의 상징적인 의미를 갖고 있다. 현재의 우리나라로 보면 재난안전대책 본부와 비견할 수 있다. 조선시대에는 "기양의례"를 통해 임금을 포함한 조정이 적극적 해결의지를 천명하고 각 고을의 관리와 지방군을 동원하여 수습 복구에 최선을 다했다. 부세를 견감하고 구제곡을 지급하는 등의 진휼정책이 뒤따랐다. 백성들도 오가작통제와 향약을 통해 환난상휼을 실천하였다. 이처럼 조선시대에는 비록 기술적인 부분은 미약했지만 재난대응의 체계만큼은 상당히 앞서있었다. 본 연구에서는 조선시대의 강원도 영동지방 자연재난사례를 조선왕조실록을 통해 조사하고 재난에 대응하기 위한 재난문화를 조사하고자 한다.

• Journal of the Korean Society of Safety
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• v.34 no.4
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• pp.1-5
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• 2019

In the field of combined cycle power generation, thermal barrier coating(TBC) protects the super-heat-resistant alloy, which forms the core component of the gas turbine, from high temperature exposure. As the turbine inlet temperature(TIT) increases, TBC is more important and durability performance is also important when considering maintenance cost and safety. Therefore, studies have been made on the fabrication method of TBC and super-heat-resistant alloy in order to improve the performance of the TBC. In recent years, due to excellent properties such as high temperature creep resistance and high temperature strength, turbine blade material have been replaced by a single crystal superalloy, however there is a lack of research on TBC applied to single crystal superalloy. In this study, to understand the isothermal degradation performance of the TBC applied to the single crystal superalloy, isothermal exposure test was conducted at various temperature to derive the delamination life. The growth curve of thermally grown oxide(TGO) layer was predicted to evaluate the isothermal degradation performance. Also, microstructural analysis was performed by scanning electron microscope(SEM) and energy dispersive X-ray spectroscopy (EDS) to determine the effect of mixed oxide formation on the delamination life.

• Journal of Korean Physical Therapy Science
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• v.26 no.1
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• pp.54-60
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• 2019

Background: This study hypothesized that increased muscle activity and balancing ability of the gluteus maximus during toe-tap exercise. Design: Cross sectional Study. Methods: After hearing the explanation of the experiment, the subjects performed a Star excursion balance test and measured the Maximum Voluntary Isomeric Contraction (MVIC). After toe-tap exercise, the MVIC was measured again and the Star excursion balance test was measured. Results: There was no significant difference in activity of gluteus muscle before and after the toe-tap exercise. There was a significant difference in the balance ability in the lateral, posterolateral, and posterior sides of the non-superior foot, but there was no significant difference in the anterior, anterolateral, posteromedial, medial, and anteromedial sides. In the case of superior foot, there were significant differences in six directions, with the exception of anterolateral and lateral sides. Conclusion: The pelvic stabilizing "gluteus maximus" exercises for balance, which is currently on the table, has many high-level exercises that are hard to do unless you're an athlete. But the Toe-tap exercise is also possible for the elderly and weak women.

• Journal of Korean Society on Water Environment
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• v.27 no.2
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• pp.178-187
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• 2011

National water supply, water resources available, the ratio of water supply to total water resources, and the ratio of water supply to available water resources were investigated to find global seawater desalination plant market for 163 nations. Water resources available per capita from 2007 to 2016, population in water scarcity region from 2011 to 2016, and the ratio of water scarcity population to total population were also analyzed for the countries. Annual percentage increase in total municipal drinking water capital expenditure and Annual percentage increase in total industrial water market were analyzed to predict the amount of water supply by use. 76 countries are suffering from water scarcity and 60 countries among the countries have coastal regions. Forty countries were selected by considering the considerable amount and highly increasing trend of water demand by use. Most countries show increasing trend of industrial water and 82 countries have more than 4% annual increasing rate for domestic water expense from 2008 to 2016 among 163 countries. Among the 76 water scarcity countries 16 countries were finally selected by considering expense prediction by use. Middle-east, east asia, pacific ocean, and west europe regions include most selected countries.