• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2021.11a
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• pp.1-2
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• 2021

조선시대는 해양활동이 위축된 시대로, 대부분의 항해는 연안항해였다. 연안항해는 암초, 저수심, 좁은항로 등으로 항해자에게 해양사고의 부담을 가중시켰다. 조선시대 해양사고는 조선왕조실록 등에 209건이 기록되어 있는 것처럼 지속적으로 발생했다. 따라서 국가경제와 직결되는 조운선의 해양사고 예방은 무엇보다 중요했다. 조선정부는 조운선의 해양사고 예방을 위해 표목을 암초, 서초 등에 설치하도록 대전속록, 속대전 등에 법제화하였다.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.65 no.4
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• pp.274-283
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• 2020

Seed dormancy is an adaptive trait in which seeds do not germinate under unfavorable environmental conditions. Low dormancy seeds are easily germinated under optimal environmental conditions, and these characteristics greatly reduce the yield and quality of crops. In the present study, we compared the pre-harvest sprouting (PHS) rate of two cultivars, Joun and Jopyeong, using the Winkler scale after heading day and temperature of the test. The PHS rate increased as the Winkler scale after heading day increased from 700℃ to 1100℃ and the temperature of the test increased. In all conditions, the PHS rate of Jopyeong was higher than that of Joun. RNA-sequencing was used to analyze the cause of the high PHS rate. We analyzed the biological metabolic processes related to the abscisic acid (ABA) metabolite pathway using the KEGG mapper with selected differentially expressed genes in PHS seeds. We found that the expression of ABA biosynthesis genes (OsNCEDs) was down-regulated and that ABA catabolic genes (OsCYP707As) was up-regulated in PHS seeds. However, the quantitative real-time PCR results showed that Joun had a higher expression of OsNCEDs than that of Jopyeong, but OsCYP707As did not yield a significant result. Joun displayed higher ABA content than that of Jopyeong not only during ripeness time but also during PHS treatment. Taken together, we provided evidence that the ABA content remaining in the seed is important to the PHS rate, which is determined by the expression level of the ABA biosynthesis gene OsNCEDs.

• Proceedings of the KSPS conference
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• 2000.03a
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• pp.186-194
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• 2000

• Proceedings of the Korea Society for Energy Engineering kosee Conference
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• 1995.05a
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• pp.25-29
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• 1995

＊병인,신미양요(1866-1871) : 기선, 화륜선이 조선연안을 나타났음. ＜셔어먼호＞사건 ; 대동강 소항중 조선의 포화맞다 ＊강화도조약 (1876년) : 조선의 문호개방--서양선박에 의한 교이(인천,부산,원산 개항) 방곡령의 선포(1889)--일상인의 미곡반출(수탈) 기선, 해룡호둥 용선(조운-1886),인천-한강나루간 수운 수공업제 공장의 동력도입(정미소-중기동력의 효시-1889) 형식 ; 석구식, 기계식(중략)

• Solar Energy
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• v.18 no.3
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• pp.71-80
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• 1998

In thermal energy storage system, energy collected from many types of heat source is stored in a storage tank and then supply to load for demand. Lately, practical use of thermal energy storage system and attention to essential use of energy have been increased. From this point of view, especially, a study about the energy extraction process from a storage tank is necessary. So in this study, useful rate of hot water and hot water extraction efficiency was analysed respect to dynamic and geometric parameters dominating the hot water extraction process.

• Proceedings of the KSPS conference
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• 1996.02a
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• pp.179-182
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• 1996

This thesis compares the duration aspect of Daegu tongue with that of standard Korean. In the former study on the rhythm of standard Korean, one of the purposes of the study was to compare it with dialects. This thesis is the first attempt In do that. For this purpose, this thesis proceeds as follows. After Introduction, Chapter 2 surveys the former study, Chapter 3 deals with the materials, method and results of the experiment. Chapter 4 analyzes and interprets the results of the experiment. In Conclusion, the most prominent fact is that the results of the experiment fall short of Daegu tongue speakers' expectations. Daegu tongue is generally considered as ' tone language. ' And as Daegu tongue speakers sensitively recognize pitch, they think that they quitckly say the syllables between the pitch stressed syllables, whereas standard Korean speakers say those syllables relatively slowly. But in this experiment, which deals with only duration ignoring pitch, their assumption is proved to be false.

• MALSORI
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• no.39
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• pp.43-51
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• 2000

The aim of this paper is to present a phonetically oriented keyboard array for the International Korean Phonetic Alphabet (IKPA). IKPA is a phonetic alphabet devised on the basis of Hangout (Korean alphabet) (Lee, 1999). Every computer has a keyboard as its input device and the English keyboard array is hewn as 'QWERTY' system, which represents the first six letters of the second line of the keyboard. This array is a traditional one devised to protect the congestion of the keys of the mechanical typewriter. To improve the anay of the keyboard, another system named 'Dvorak' has been devised. Likewise, a serious attempt has been made by the authors to work out an efficient keyboard for IKPA representing the manner of vowel and consonant classification. In the phonetic keyboard, the consonant symbols are arranged in the left hand side according to the Place and mauler of the articulation and the vowel symbols in the right hand side according to the vowel quadrilateral.

• MALSORI
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• no.27_28
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• pp.89-109
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• 1994

This thesis compares the duration aspect of the Daegu tongue with that of standard Korean. In the former study on the rhythm of standard Korean, one of the purposes of the study was to compare it with dialects. This thesis is the first attempt to do that. For this purpose, this thesis proceeds as follows. After Introduction, Chapter 2 surveys the former study. Chapter 3 deals with the materials, method and results of the experiment. Chapter 4 analyzes and interprets the results of the experiment, In Conclusion, the most Prominent fact is that the results of the experiment fall short of Daegu tongue speakers' expectations. The Daegu tongue is generally considered as a 'tone language.' And as Daegu tongue speakers sensitively recognize pitch, they think that they quickly say the syllables between the Pitch stressed syllables, whereas standard Korean speakers say those syllables relatively slowly, But in this experiment, which deals with only duration ignoring Pitch, their assumption is proved to be false.

• Solar Energy
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• v.17 no.1
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• pp.79-91
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• 1997

Thermal energy storage system used a storage tank is a reasonable method to solve energy problem. In thermal energy storage system, energy collected from many types of heat source is stored in a storage tank and then supply to load at the time is in demand. In this study, flow characteristics and storage efficiency were analysed by using a insulated raft in longterm hot water storage system. From the experiment it is found that insulated raft has a important role in longterm hot water storage system and storage efficiency can be obtained to 96% using inletport type and insulated raft together.

• Proceedings of the KSPS conference
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• 1996.10a
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• pp.379-383
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• 1996

This paper compares the duration aspect of Daegu tongue with that of standard Korean. In the former study on the rhythm of standard Korean, one of the purposes of the study was to compare it with dialects. This paper is the first attempt to do that. For this purpose, this paper proceeds as follows. After Introduction, Chapter 2 surveys the former study. Chapter 3 deals with the materials, method and results of the experiment. Chapter 4 analyzes and interprets the results of the experiment. In Conclusion, the most prominent fact is that the results of the experiment fall short of Daegu tongue speakers' expectations. Daegu tongue is generally considered as "tone language." And as Daegu tongue speakers sensitively recognize pitch, they think that they quitckly say the syllables between the pitch stressed syllables, whereas standard Korean speakers say those syllables relatively slowly. But in this experiment, which deals with only duration ignoring pitch, their assumption is proved to be false.