• The Journal of Internal Korean Medicine
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• v.18 no.1
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• pp.255-269
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• 1997

This study has been carried out to investigate the cause, pathological mechanism and treatment of CVA in Youmunsachin(儒門事親), written by Changjongjung(張從政) The results were follows : 1. The cause of CVA in Youmunsachin(儒門事親) was quotated from the theory of Naekyung(內經), Guel-eum-pung-mok(厥陰風木) and exogenous wind evil(外感風邪) on weakness of human body. 2. The pathological mechenism of CVA was that flows of Ki(氣) were obstructive, or executive heart(心) suppress lung(肺) and weakened lung(金) did not control liver(肝), executive liver brought to Gan-pung-nae-dong(肝風內動), and he thought that onset of CVA was frequent in 3nd, 4th, 9th. 10th, 12th lunar month. 3. In treatment of CVA, Han-to-ha-bub(汗吐不法, sweating vomiting passing stool method to remove evil) was used. His treatment was divided into ten sweating vomiting passing stool method by medication for internal use, one vomiting method by medication for external use and one sweating method by using acupuncture. 4. In treatment of CVA, when emergency time, vomiting and passing stool method were used, and then, method of Yangheulgeopung(養血祛風), Chungeulgeodam(淸熱去痰), Pyorissanghae(表裏雙解), Whalheultonglak(活血通絡) was used. 5. In the form of prescription, he used the form of Hwan, San(丸, 散), and he used toxic agent frequently.

• Applied Biological Chemistry
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• v.6
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• pp.8-13
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• 1965

Korean MEJUES were prepared by means of ordinary, Improved and compromised methods, and analyses of the changes in various chemical compositions of the Soy-sauces throughout the fermentation period of 10 weeks. Now, their result, are as the following as. (1) In all of the Soy-sauces under study the content of organic acids showed a slight increase upto 4 week, and a marked increased after this period. (2) In all of the soy-sauces the total nitrogenous content indicated a rapid increase until 4 weeks, and a slower increase after this. (3) In all of the soy-souses, the content of free amino acids displayed a liner proportional increament until 8 weeks and then slower increose. (4) In all of the soy-souses the content of reducing sugars indicated a slight increase until 4 weeks, and after this it showed a rapid decrease until 4 weeks, in the improved soy-souses and, then maintained an almost flat curve. In the ordinary and Compromised soy-souses there was a rapid decrease in reducing sugars until 6 weeks, and then an almost 리at curves. (5) In the ordinary soy-sauce the SAMWOL-ZANG-BUB(soy-sauce prepared in March) is considered to be based on a comparatively scientific ground during the fermentative period. (6) In order to improve the taste in ordinary soy-sauce it is favorable to delay the period of preparation. The adequate period appears requires 8 weeks at least. Accordingly it is recommended to mix the materials with carbohydrate source. (7) In the improved soy-sauce according to the SAMWOL-ZANG-BUB of ordinary soy-sauce it is thought that 8 weeks were adequate for the fermentation. (8) The compromised method may be recommended for the improvement of nomemade soy-souce, and it may be also superior to the ordinary soy-sauce in quality.

• Journal for History of Mathematics
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• v.19 no.2
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• pp.1-24
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• 2006

We study the theory of finite series in Chosun Dynasty Mathematics. We divide it into two parts by the publication of Lee Sang Hyuk(李尙爀, 1810-?)'s Ik San(翼算, 1868) and then investigate their history. The first part is examined by Gyung Sun Jing(慶善徵, 1616-?)'s Muk Sa Jib San Bub(默思集算法), Choi Suk Jung(崔錫鼎)'s Gu Su Ryak(九數略), Hong Jung Ha(洪正夏)'s Gu Il Jib(九一集), Cho Tae Gu(趙泰耉)'s Ju Su Gwan Gyun(籌書管見), Hwang Yun Suk(黃胤錫)'s San Hak Ib Mun(算學入門), Bae Sang Sul(裵相設)'s Su Gye Soe Rok and Nam Byung Gil(南秉吉), 1820-1869)'s San Hak Jung Ei(算學正義, 1867), and then conclude that the theory of finite series in the period is rather stable. Lee Sang Hyuk obtained the most creative results on the theory in his Ik San if not in whole mathematics in Chosun Dynasty. He introduced a new problem of truncated series(截積). By a new method, called the partition method(分積法), he completely solved the problem and further obtained the complete structure of finite series.

• Journal of the Korean Society of Manufacturing Process Engineers
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• v.11 no.5
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• pp.129-136
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• 2012

On this study, $CO_2$ gas, net of Ar gas, and mixed gas in solid wire(AWS ER 70S-6) and flux cored wire(AWS E71T-1) were used to weld on Mild steel(SS400). After the progress, the status changes of the welds in Mild steel(SS400) were investigated with compositional changes. For stable experiments, welding was conducted using the automatic feeder. Radiation testing, hardness testing, chemical composition analysis and penetrated cross-section were measured. Through these experiments, shapes of penetrated cross-section, chemical composition changes, and weld defects according to the variation of welding gas were known. Weld defects and weld cross-sectional shapes by the variation of the welding voltage were also detected.

• Journal of Chest Surgery
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• v.51 no.2
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• pp.159-159
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• 2018

• Journal of information and communication convergence engineering
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• v.9 no.2
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• pp.166-171
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• 2011

This paper investigates the design issues of spectrum sensing in the cognitive radio (CR) networks of opportunistic unlicensed spectrum access. The cognitive radios can perform a communication using the incumbent user spectrum band without the interference caused by the cognitive radio users. In this case, the cognitive radios must know the real-time radio environments of the incumbent user spectrum band using the spectrum sensing, beacon signal, and geo-location database access. Then in this paper, we are going to provide spectrum sensing issues which include the sensing techniques, the regulatory requirements, the analysis of DTV detection threshold, and main considerations associated with the spectrum sensing design in cognitive radio systems. Also, this paper introduces design trade-offs in order to optimize the sensing parameters such as sensing time and sensing complexity.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.21 no.2
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• pp.34-39
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• 2007

UWB(Ultra Wide Band) system for high speed and high accurate location has been studying actively. This paper presents the design and implementation of RF transceiver for DS-CDMA(Direct Sequence-Code Division Multiple Access) UWB device. Major components of RF transceiver such as Low Noise Amplifier(LNA) and Band Pass Filter(BPF) are designed and then fabricated to meet wideband characteristics. The RF transceiver was implemented by the use of the fabricated components and commercial devices after carrying out performance simulation. Through the performance evaluation of the UWB RF transceiver with W-CDMA signal, the approach of design, implementation and evaluation of RF transceiver which is available to DS-CDMA UWB system is verified.

• Proceedings of the Korean Society of Disaster Information Conference
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• 2022.10a
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• pp.311-312
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• 2022

최근 발생한 경주 및 포항 지진으로 인해 다수의 매립배관 손상이 보고되었다. 벨로우즈 신축관이음은 기하학적 특성으로 인해 진동 및 침하 등으로 인한 손상을 저감시킬 수 있다. 벨로우즈 신축관이음관의 내진 성능평가에 대한 실험적 혹은 해석적 연구는 미미한 상황이다. 본 연구는 벨로우즈 신축이음관의 내진성능을 분석하기 위해 반복하중 기반의 실험적 연구를 수행하였다. 또한 실험결과를 기반으로 3차원 유한요소 모델을 구축하였으며 실험과 해석에서 얻어진 하중-변위 관계를 비교하였다. 해석 모델에서 전체적인 강성이 큰 것으로 나타났으며 최대 변위가 작용할 때 에너지 소산량은 약 10% 가량 큰 것으로 나타났다.

• The Journal of Korean Medical History
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• v.15 no.2
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• pp.11-20
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• 2002

In "EuiMoonBubRyool" chapter 4, Yuchang criticized previous doctors since "damaged by wet in autumn" written in "Somun" must be corrected as "damaged by dry in autumn". The reason why the sentence must be corrected is that dry and damp are different atmosphere. He tried to explain with changes of season and the rapid pulse in autumn is said to be a contraindiction in "Naekyung" and it supports Autumn dry theory. He criticized previous doctors about many incorrect points of dry disease throu호 various aspects. Criticism on Dongwon's treatment, Dangye's medical theory and not having a treatment, and Mujungsoon's treatment and etc. are the examples. Symtoms and treatment of Dry disease that Yuchang commented helped in deepening the contents and widening the general understanding of the disease.

• Proceedings of the Korea Information Processing Society Conference
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• 2003.11a
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• pp.543-546
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• 2003

Kaiman 필터는 통계적 방법에 근거한 필터이므로, 이것을 구성할 때, 추정대상이나 잡음 등의 통계량을 미리 알고 있을 필요가 있다. 일반적으로 이러한 양을 미리 아는 것은 곤란하므로, 필터를 설계할 때에는, 적당한 통계적 모델을 가정하지 않으면 안된다. 그러나, 실제의 통계량이 이러한 값과 다른 경우, 즉, model mismatch가 발생하면, 최적의 추정이 행하여지지 않고 mismatch가 정도가 큰 경우에는, 올바른 추정이 전혀 행하여지지 않을 가능성이 있다. 본 논문에서는 Kalman 필터에 model mismatch가 발생한 경우의 추정값으로의 영향을 2가지의 방법으로 검토한다.