• Sijohaknonchong
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• v.24
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• pp.223-258
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• 2006

This Research is about the classification of 'Sijochang', or the Korean ode narrative song, in terms of music. Contrary to the literature classification by the number of letters, sijochang varies with the melody. Literally, the classification is generally made as Dansijo(or short ode) Jungsijo(or medium ode) and Jangsijo(or lengthy ode) but the sijochang is normally divided into 'Pyongsijo' (or plain ode), 'Jirumsijo and Saseolsijo'. As while the same Sijochang is called under the different names, the different type of sijochang is also called as the same name, it needs the discussion about its name. Some Korean classical musicians have attempted to define it but they are trying to do it without the specific reasoning about its concept. As a result, the systematic research is required. This study designs to streamline the currently confusing and complex names and set up the sijo's classification system. After reviewing the ancient music note, current sijo score and the traditional theory, I largely classified it into 3 types: Pyongsijo, Jirumsijo and Saseolsijo. And then, 1 analyzed on to which type the sijochang which is presently called belongs, based on several principles. The 67 names of the sijo which I have investigated about are classified with them sharpy reduced into 16. Among the current sijo names. there are some which are of same type yet of different phonetics and there are others which are of different phonetics yet of same type. To avoid such complex and troublesome names, I have orchestrated them as follows, taking the literary and music concept into account. 1) Pyongsijo type : Pyongsijo, Joongherisijo, Wujosijo and Payeonkok 2) Jirumsijo type: Jirumsiro, Namchangjirumsijo(it refers to Jirumsijo sung by male ), Yeochangjirumsijo (it refers to Jirumsijo sung by female), Banjirumsijo(it refers to half the Jiumsiro), Onjirumsijo (it refers to the whole Jirumsijo), Wujojr\irumsijo, Saseoljirumsijo and Whimorisijo) 3) Saseolsijo type : Saseolsijo, Bansaseolsijo(it refers to half the Saseolsijo, Gaksijo or Pyongsiro There are still lots of things to musically streamline, in the fields of disposition of Sijo letters, its form, musical scale and influences on other genre. etc. and as such. the accumulation of theory on them is urgently required. Those musical elements need an in-depth review and study by the experts and the Korean traditional musicians. Later research is expected to play a role of exploring it.

• Korean Journal of Heritage: History & Science
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• v.56 no.3
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• pp.174-193
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• 2023

Korea is surrounded by the sea and has rivers connecting to it throughout the inland areas, which has been a geographical characteristic since ancient times. As a result, there have been exchanges and conflicts with various countries through the sea, and rivers have facilitated the transportation of ships carrying grain, goods paid for by taxes, and passengers. Since the past, the sea and rivers have had a significant impact on the lives of Koreans. Consequently, it is expected that there are many cultural heritages submerged in the sea and rivers, and continuous efforts are being made to discover and preserve them. Underwater cultural heritage is difficult to discover due to its location in the sea or rivers, making direct visual observation and exploration challenging. To overcome these limitations, various geophysical survey techniques are employed. Geophysical survey methods utilize the physical properties of elastic waves, including their reflection and refraction, to conduct surveys such as bathymetry, underwater topography and strata. These techniques detect the physical characteristics of underwater objects and seafloor formation in the underwater environment, analyze differences, and identify underwater cultural heritage located on or buried in the seabed. Bathymetry uses an echo sounder, and an underwater topography survey uses a side-scan sonar to find underwater artifacts lying on or partially exposed to the seabed, and a marine shallow strata survey uses a sub-bottom profiler to find underwater heritages buried in the seabed. However, the underwater cultural heritage discovered in domestic waters thus far has largely been accidental findings by fishermen, divers, or octopus hunters. This study aims to analyze and summarize the latest research trends in equipment used for underwater cultural heritage exploration, including bathymetric surveys, underwater topography surveys and strata surveys. The goal is to contribute to research on underwater cultural heritage investigation in the domestic context.

• Economic and Environmental Geology
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• v.39 no.4 s.179
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• pp.369-384
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• 2006

Korean Peninsula, located on the southeastern part of Eurasian plate, belongs to the intraplate region. The characteristics of intraplate earthquake show the low and rare seismicity and the sparse and irregular distribution of epicenters comparing to interplate earthquake. To evaluate the exact seismic activity in intraplate region, long-term seismic data including historical earthquake data should be archived. Fortunately the long-term historical earthquake records about 2,000 years are available in Korea Peninsula. By the analysis of this historical and instrumental earthquake data, seismic activity was very high in 16-18 centuries and is more active at the Yellow sea area than East sea area. Comparing to the high seismic activity of the north-eastern China in 16-18 centuries, it is inferred that seismic activity in two regions shows close relationship. Also general trend of epicenter distribution shows the SE-NW direction. In Korea Peninsula, the first seismic station was installed at Incheon in 1905 and 5 additional seismic stations were installed till 1943. There was no seismic station from 1945 to 1962, but a World Wide Standardized Seismograph was installed at Seoul in 1963. In 1990, Korean Meteorological Adminstration(KMA) had established centralized modem seismic network in real-time, consisted of 12 stations. After that time, many institutes tried to expand their own seismic networks in Korea Peninsula. Now KMA operates 35 velocity-type seismic stations and 75 accelerometers and Korea Institute of Geoscience and Mineral Resources operates 32 and 16 stations, respectively. Korea Institute of Nuclear Safety and Korea Electric Power Research Institute operate 4 and 13 stations, consisted of velocity-type and accelerometer. In and around the Korean Peninsula, 27 intraplate earthquake mechanisms since 1936 were analyzed to understand the regional stress orientation and tectonics. These earthquakes are largest ones in this century and may represent the characteristics of earthquake in this region. Focal mechanism of these earthquakes show predominant strike-slip faulting with small amount of thrust components. The average P-axis is almost horizontal ENE-WSW. In north-eastern China, strike-slip faulting is dominant and nearly horizontal average P-axis in ENE-WSW is very similar with the Korean Peninsula. On the other hand, in the eastern part of East Sea, thrust faulting is dominant and average P-axis is horizontal with ESE-WNW. This indicate that not only the subducting Pacific Plate in east but also the indenting Indian Plate controls earthquake mechanism in the far east of the Eurasian Plate. Crustal velocity model is very important to determine the hypocenters of the local earthquakes. But the crust model in and around Korean Peninsula is not clear till now, because the sufficient seismic data could not accumulated. To solve this problem, reflection and refraction seismic survey and seismic wave analysis method were simultaneously applied to two long cross-section traversing the southern Korean Peninsula since 2002. This survey should be continuously conducted.