• 응용통계연구
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• 제28권2호
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• pp.159-174
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• 2015

최근에 Dragomiretskiy와 Zosso (2014)는 경험적모드분해의 단점을 보완하여 새로운 신호 분해방법인 변동모드분해법(Variational Mode Decomposition)을 고안하였다. 기본적으로 변동모드분해법은 경험적모드분해법에 비하여 주파수 탐색 및 분리(tone detection and tone separation)에 탁월한 성능을 보인다. 또한 고속퓨리에변환을 기반으로 한 알고리즘을 사용하여 경험적모드분해법보다 잡음에 강건하다는 장점이 있다. 하지만 변동모드분해법은 결측 등으로 신호가 동일한 시간간격 혹은 공간적 간격으로 측정되지 않은 경우 제대로 동작하지 않는 단점이 있다. 이를 보완하기 위해서 본 논문에서는 변동모드분해법에 다단계우도함수를 조합하는 새로운 방법을 제안한다. 여기에서 다단계우도함수는 변동모드분해법이 신호를 적절한 내재모드함수로 분해하기 전에 결측치를 대체하는 효율적인 방법을 제시한다. 모의실험과 실제 자료의 사례연구를 통하여 변동모드분해법이 기존의 방법보다 더 효율적으로 신호를 분해한다는 것을 보일 것이다.

• 한국식생활문화학회지
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• 제36권2호
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• pp.143-157
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• 2021

This study aimed to analyze the periodic prevalence of the vegetables during the Joseon era with JoseonWangjoSilrok as a reference. The JoseonWangjoSilrok articles were collected from the Guksapyeonchanwewonhwe site, using web-crawling techniques to extract the relevant information. Out of 384,582 search results, 9,560 articles with vegetable-related keywords were found. According to the annual average vegetable recordings during the regimes of various kings, there were two peaking curves in the 15^th and 18^th centuryJoseon. The found was: 2,750 in the 18^th century, 2,529 in the 15^th century, 1,424 in the 16^th century, and 1,018 in the 19^th century. A Variable Interest Index was designed to ascertain the interestin vegetables of the 27 Joseon kings. The king most interested in vegetables was the 19^th king Sookjong. The second most interested king was Youngjo. There were 5,105 vegetable-related findings within the JoseonWangjoSilrok related to specific species and categories of vegetables. Among the words found: 1,194 were stem-leaves vegetables (23.39%), 1,017 were root vegetables (19.92%), 1,148 were flower-fruit vegetables (22.49%), 1,144 were spice vegetables (22.41%), 95 were mushrooms (1.86%), and 507 were seaweeds (9.93%). Statistical analysis using ANOVA revealed the chronological factors that affected the vegetables' prevalence index.

• 한국식생활문화학회지
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• 제37권1호
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• pp.26-38
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• 2022

This study used the big data method to analyze the chronological frequency of seafood appearance and variety mentioned by the veritable records of the Joseon dynasty. The findings will be used as a basis for Joseon Period's food cultural research. The web-crawling method was used to digitally scrap from the veritable records of the Joseon dynasty of Joseon's first to the twenty-seventh king. A total of 9,536 cases indicated the appearance of seafood out of the 384,582 articles. Seafood were termed "seafood" as a collective noun 107 times (1.12%), 27 types of fish 8,372 times (87.79%), 3 types of mollusca (1.28%), 18 types of shellfish 213 times (2.23%), 6 types of crustacean 188 times (1.97%), 9 types of seaweed 534 times (5.60%). Fish appeared most frequently out of all the recorded seafood. Sea fish appeared more frequently than the freshwater fish. Kings that showed the most Strong Interest Inventory (SII) were: Sungjong from the 15^thcentury, Sehjo from the 15^th, Youngjo from the 18^th, Sehjong from the 15^th, and Jungjo from the 18^th respectively. Kings of Chosen were most interested in seafood in the 15^th and 18^th centuries.

• 대한한방내과학회지
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• 제45권2호
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• pp.199-207
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• 2024

Introduction: Gullain-Barre syndrome (GBS) is a rapid, symmetric muscle weakness that often follows respiratory or gastrointestinal infections. Standard treatments include plasmapheresis and intravenous immunoglobulin, but outcomes can vary among patients. The integration of Korean medicine, notably unexplored in quantitative assessments of balance and walking, provides a novel approach to treatment. Case presentation: A 53-year-old male diagnosed with GBS presented to the hospital 8 days post-onset. He received treatments consisting of acupuncture, electroacupuncture, and rehabilitation over a period of approximately 4 weeks. Upon admission, the patient exhibited symptoms of both limb weakness and paresthesia, requiring the use of a wheelchair. Post-treatment, muscle strength and balance were significantly improved, leading to the restoration of independent ambulation, including running. Conclusions: This case illustrates the potential of integrated Korean and conventional medical treatments to accelerate recovery in GBS patients, overcoming typical prognosis timelines. The improvements in gait and balance were substantiated by quantitative assessments, suggesting a promising area for further research into the effects of combined therapeutic approaches to GBS recovery.

• 한국수학교육학회지시리즈A:수학교육
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• 제24권2호
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• pp.48-73
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• 1986

Though the tradition of Korean mathematics since the ancient time up to the 'Enlightenment Period' in the late 19th century had been under the influence of the Chinese mathematics, it strove to develop its own independent of Chinese. However, the fact that it couldn't succeed to form the independent Korean mathematics in spite of many chances under the reign of Kings Sejong, Youngjo, and Joungjo was mainly due to the use of Chinese characters by Koreans. Han-gul (Korean characters) invented by King Sejong had not been used widely as it was called and despised Un-mun and Koreans still used Chinese characters as the only 'true letters' (Jin-suh). The correlation between characters and culture was such that, if Koreans used Han-gul as their official letters, we may have different picture of Korean mathematics. It is quite interesting to note that the mathematics in the 'Enlightenment Period' changed rather smoothly into the Western mathematics at the time when Han-gul was used officially with Chinese characters. In Koryo, the mathematics existed only as a part of the Confucian refinement, not as the object of sincere study. The mathematics in Koryo inherited that of the Unified Shilla without any remarkable development of its own, and the mathematicians were the Inner Officials isolated from the outside world who maintained their positions as specialists amid the turbulence of political changes. They formed a kind of Guild, their posts becoming patrimony. The mathematics in Koryo significant in that they paved the way for that of Chosun through a few books of mathematics such as 'Sanhak-Kyemong', 'Yanghwi-Sanpup' and 'Sangmyung-Sanpup'. King Sejong was quite phenomenal in his policy of promotion of mathematics. King himself was deeply interested in the study, createing an atmosphere in which all the high ranking officials and scholars highly valued mathematics. The sudden development of mathematic culture was mainly due to the personality and capacity of king who took anyone with the mathematic talent into government service regardless of his birth and against the strong opposition of the conservative officials. However, King's view of mathematics never resulted in the true development of mathematics perse and he used it only as an official technique in the tradition way. Korean mathematics in King Sejong's reign was based upon both the natural philosophy in China and the unique geo-political reality of Korean peninsula. The reason why the mathematic culture failed to develop continually against those social background was that the mathematicians were not allowed to play the vital role in that culture, they being only the instrument for the personality or politics of the king. While the learned scholar class sometimes played the important role for the development of the mathematic culture, they often as not became an adamant barrier to it. As the society in Chosun needed the function of mathematics acutely, the mathematicians formed the settled class called Jung-in (Middle-Man). Jung-in was a unique class in Chosun and we can't find its equivalent in China or Japan. These Jung-in mathematician officials lacked tendency to publish their study, since their society was strictly exclusive and their knowledge was very limited. Though they were relatively low class, these mathematicians played very important role in Chosun society. In 'Sil-Hak (the Practical Learning) period' which began in the late 16th century, especially in the reigns of Kings Youngjo and Jungjo, which was called the Renaissance of Chosun, the ambitious policy for the development of science and technology called for. the rapid increase of he number of such technocrats as mathematics, astronomy and medicine. Amid these social changes, the Jung-in mathematicians inevitably became quite ambitious and proud. They tried to explore deeply into mathematics perse beyond the narrow limit of knowledge required for their office. Thus, in this period the mathematics developed rapidly, undergoing very important changes. The characteristic features of the mathematics in this period were: Jung-in mathematicians' active study an publication, the mathematic studies by the renowned scholars of Sil-Hak, joint works by these two classes, their approach to the Western mathematics and their effort to develop Korean mathematics. Toward the 'Enlightenment Period' in the late 19th century, the Western mathematics experienced great difficulty to take its roots in the Peninsula which had been under the strong influence of Confucian ideology and traditional Korean mathematic system. However, with King Kojong's ordinance in 1895, the traditional Korean mathematics influenced by Chinese disappeared from the history of Korean mathematics, as the school system was hanged into the Western style and the Western mathematics was adopted as the only mathematics to be taught at the Schools of various levels. Thus the 'Enlightenment Period' is the period in which Korean mathematics shifted from Chinese into European.

• 한국수학사학회지
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• 제2권1호
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• pp.91-105
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• 1985

Though the tradition of Korean mathematics since the ancient time up to the "Enlightenment Period" in the late 19th century had been under the influence of the Chinese mathematics, it strove to develop its own independent of Chinese. However, the fact that it couldn't succeed to form the independent Korean mathematics in spite of many chances under the reign of Kings Sejong, Youngjo, and Joungjo was mainly due to the use of Chinese characters by Koreans. Han-gul (Korean characters) invented by King Sejong had not been used widely as it was called and despised Un-mun and Koreans still used Chinese characters as the only "true letters" (Jin-suh). The correlation between characters and culture was such that , if Koreans used Han-gul as their official letters, we may have different picture of Korean mathematics. It is quite interesting to note that the mathematics in the "Enlightenment Period" changed rather smoothly into the Western mathematics at the time when Han-gul was used officially with Chinese characters. In Koryo, the mathematics existed only as a part of the Confucian refinement, not as the object of sincere study. The mathematics in Koryo inherited that of the Unified Shilla without any remarkable development of its own, and the mathematicians were the Inner Officials isolated from the outside world who maintained their positions as specialists amid the turbulence of political changes. They formed a kind of Guild, their posts becoming patrimony. The mathematics in Koryo is significant in that they paved the way for that of Chosun through a few books of mathematics such as "Sanhak-Kyemong, "Yanghwi - Sanpup" and "Sangmyung-Sanpup." King Sejong was quite phenomenal in his policy of promotion of mathematics. King himself was deeply interested in the study, createing an atmosphere in which all the high ranking officials and scholars highly valued mathematics. The sudden development of mathematic culture was mainly due to the personality and capacity of King who took any one with the mathematic talent onto government service regardless of his birth and against the strong opposition of the conservative officials. However, King's view of mathematics never resulted in the true development of mathematics per se and he used it only as an official technique in the tradition way. Korean mathematics in King Sejong's reign was based upon both the natural philosophy in China and the unique geo-political reality of Korean peninsula. The reason why the mathematic culture failed to develop continually against those social background was that the mathematicians were not allowed to play the vital role in that culture, they being only the instrument for the personality or politics of the King. While the learned scholar class sometimes played the important role for the development of the mathematic culture, they often as not became an adamant barrier to it. As the society in Chosun needed the function of mathematics acutely, the mathematicians formed the settled class called Jung-in (Middle-Man). Jung-in was a unique class in Chosun and we can't find its equivalent in China of Japan. These Jung-in mathematician officials lacked tendency to publish their study, since their society was strictly exclusive and their knowledge was very limited. Though they were relatively low class, these mathematicians played very important role in Chosun society. In "Sil-Hak (the Practical Learning) period" which began in the late 16th century, especially in the reigns of King Youngjo and Jungjo, which was called the Renaissance of Chosun, the ambitious policy for the development of science and technology called for the rapid increase of the number of such technocrats as mathematicians inevitably became quite ambitious and proud. They tried to explore deeply into mathematics per se beyond the narrow limit of knowledge required for their office. Thus, in this period the mathematics developed rapidly, undergoing very important changes. The characteristic features of the mathematics in this period were: Jung-in mathematicians' active study an publication, the mathematic studies by the renowned scholars of Sil-Hak, joint works by these two classes, their approach to the Western mathematics and their effort to develop Korean mathematics. Toward the "Enlightenment Period" in the late 19th century, the Western mathematics experienced great difficulty to take its roots in the Peninsula which had been under the strong influence of Confucian ideology and traditional Korean mathematic system. However, with King Kojong's ordinance in 1895, the traditonal Korean mathematics influenced by Chinese disappeared from the history of Korean mathematics, as the school system was changed into the Western style and the Western matehmatics was adopted as the only mathematics to be taught at the schools of various levels. Thus the "Enlightenment Period" is the period in which Korean mathematics sifted from Chinese into European.od" is the period in which Korean mathematics sifted from Chinese into European.pean.

• 동양고전연구
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• 제32호
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• pp.103-128
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• 2008

정조는 척족이 특권세력으로 발호하던 영조대 후반의 탕평정치에서 아버지를 여읜 피해자였다. 노론의 거센 방해공작을 뚫고 왕위에 오른 정조의 목표는 왕권 강화였다. 정조는 탕평정책을 영조 50여년 치세의 대업적으로 칭송하고 척신과 탕평당의 폐해를 지적하면서 신하들에게 왕을 위해 충성을 다하는 '국변인(國邊人)'이 되어줄 것을 요구하였다. 정조가 즉위 직후부터 설치 운영한 규장각(奎章閣)은 겉으로는 어제(御製)의 봉안 등을 표방했지만, 실제로는 정조의 우군을 양성하기 위한 기구였다. 그만큼 정조가 외척들을 누르고 어떻게 사대부들을 포섭하는가 하는 문제는 정권의 사활이 걸린 문제였다. 본고에서는 정조가 사대부들을 어떻게 굴복시키고 포섭하려 했는가라는 문제를 본격적으로 조명하였다. 그것을 통해서 정조가 시도한 왕권강화책의 논리와 방법을 확인해 보고자 하였다. 정조는 경학(經學)의 본질은 성리학이 아니라 실생활과 절실하게 관련된 학문이라는 점을 강조함으로써 사대부들의 이념적 근거를 붕괴시키고자 하였다. 정조가 사대부들의 풍기와 세도를 비판하고 그들의 학문인 주자성리학의 의미를 축소했던 것은 사대부들을 왕권에 복속시키기 위한 방편이었다. 붕당론이나 성학론을 기본으로 하는 사대부들의 정치 이념과 학문적 근거를 반박함으로써 공론(公論)의 주체로서 국왕의 권위를 강조하려고 하였다. 정조가 영조의 '군사(君師)' 개념을 계승하고 왕호도 '홍재(弘齋)'에서 '만천명월주인옹(萬川明月主人翁)'으로 바꾼 것은 그의 사대부 비판이 궁극적으로 지향하고자 했던 바를 상징적으로 보여준다.

• 건축역사연구
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• 제15권1호
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• pp.29-40
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• 2006

This paper is focused on Damheonseo(湛軒書), an anthology written by Hong Daeyong, and I deal with Chinese Architectural views which he had experienced in his itinerary to Beijing, and the vivid pictures of Joseonkwan (called the Koryo or Joseon Embassy) located in Beijing at that time. He was a scholar of great erudition over astronomy, mathematics, military science, politics, and so on. He was interested in practical sciences at early time, and criticized secular scholars full of vanity who had presented purposeless articles. In his age of 35, Qianlong(乾隆) 30 (1764, Youngjo 41), he, a military escort, accompanied by Hong Uk, Joseon envoy and his uncle. Before his itinerary, he self-studied Chinese. Also, during a long journey he got new experiences and information around each area, deviating his group whenever he had some times. He could get more variant experiences than others because of his character full of curiosity, and his observations from the vivid lives of the time helped us get various views between Chinese and Korean architecture. Likewise, although he denounced Qing(淸) scathingly as a barbarian, he mentioned several points about the characteristics of Chinese architecture at that time. First of all, totally Chinese architecture had strong rational and practical points. Secondly, based on bountiful products, buildings along streets shown in Chinese city had sophisticated compositions, and luxurious and magnificent appearances. Thirdly, using the brick from walls to houses was so universal. Fourthly, the layouts of building with three- or four-closed courtyard had very orderly shapes, and the structure of street was also so arranged. Finally, because of stand-up lives, the scales and appearances of interior space were even more extended, and storages were less developed than those of Joseon. As another points, I found that Joseonkwan was moved next to Shushangguan(庶常館)from Huidongnanguan(會同南館) around Hanlimyuan(翰林院), and had been remodeled into a house with Korean custom in using the inner spaces, although it was followed by a closed courtyard style. Likewise, I recognized that Ondols were sure to be established in all temporary houses during the journey to Qing, and felt their strong traditional residential custom in such mentions. Now that the past pictures have disappeared and ways of life and our values have been largely changed, this study has very important meaning in comparing the ancient Chinese and Korean architecture.

• 한국식품영양학회지
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• 제18권1호
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• pp.72-80
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• 2005

본 실험은 칼슘 결핍과 난소 제거로 유발한 골다공증에 대한 한방요법의 효과에 대하여 고찰하였다. 1) 난소 제거로 인한 에스트로겐의 결핍 및 칼슘 결핍은 폐경여성에서 관찰되어지는 것처럼 골강도 및 골밀도의 손실을 일으켰다. 2) 한방 추출물의 투여는 에스트로겐 결핍 및 칼슘 결핍으로 유도된 골강도 및 골밀도 손실에 대한 예방효과가 관찰되었다 3) 난소제거로 인한 에스트로겐의 결핍 및 칼슘 결핍은 골대사의 생화학적 지표들(혈청 중 alkaline phosphatase, acid phosphatase, osteocalcin, 그리고 뇨중 deoxyopyridinoline 농도)에 영향을 미치지 않았다. 4) 한방 추출물의 투여 또한 골 대사의 생화학적 지표들에 영향을 미치지 않았다. 결론적으로, 한방 추출물의 골손실에 대한 예방효과는 한방 추출물의 골다공증 치료제로서의 가능성을 제시하며, 새로운 골다공증 치료제 개발 일환으로 한방추출물의 적용기간 및 농도 변화를 통한 계속적인 연구가 요구되어진다.

• Current Photovoltaic Research
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• 제4권3호
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• pp.108-113
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• 2016

III-V compound semiconductor based thin film solar cells promise relatively higher power conversion efficiencies and better device reliability. In general, the thin film III-V solar cells are fabricated by an epitaxial lift-off process, which requires an $Al_xGa_{1-x}As$ ($x{\geq}0.8$) sacrificial layer and an inverted solar cell structure. However, the device performance of the inversely grown solar cell could be degraded due to the different internal diffusion conditions. In this study, InGaP/GaAs double-junction solar cells are inversely grown by MOCVD on GaAs (100) substrates. The thickness of the GaAs base layer is reduced to minimize the thermal budget during the growth. A wide band gap p-AlGaAs/n-InGaP tunnel junction structure is employed to connect the two subcells with minimal electrical loss. The solar cell structures are transferred on to thin metal films formed by Au electroplating. An AlAs layer with a thickness of 20 nm is used as a sacrificial layer, which is removed by a HF:Acetone (1:1) solution during the epitaxial lift-off process. As a result, the flexible InGaP/GaAs solar cell was fabricated successfully with an efficiency of 27.79% under AM1.5G illumination. The efficiency was kept at almost the same value after bending tests of 1,000 cycles with a radius of curvature of 10 mm.