• 한국지능시스템학회논문지
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• 제18권6호
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• pp.787-796
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• 2008

매니퓰레이터와 환경과의 충돌 시 충격량을 줄이기 위해서는 유효질량이 최소화되는 자세가 요구되므로 자체운동(self motion)을 통하여 이러한 자세를 유지해야 한다. 이때 여유자유도를 분해하기 위하여 관절 토크 국소 최소화 알고리즘을 이용할 수 있다. 본 논문에서는 매니퓰레이터와 환경과의 충돌 시 충격 및 손상을 줄이기 위해 기구학적인 여자유도를 이용하여 관절토크를 최소화시킴과 동시에 충돌을 최소화시키는 새로운 제어 알고리즘을 제안한다 이 알고리즘은 기존의 국소 토크 최소화 알고리즘과 국소 충돌 최소화 알고리즘에 퍼지 로직과 유전자 알고리즘을 적용시킨 것이다. 제안된 알고리즘은 3자유도 평면 여자유도 매니퓰레이터에 적용하였으며, 시뮬레이션 결과를 통하여 제안된 알고리즘의 타당성을 확인하였다.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 1999년도 춘계학술대회 논문집
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• pp.434-437
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• 1999

An EM pump is used for the purpose of transporting the electrically conducting liquid sodium of the high temperature that is used as a coolant in the liquid metal reactor. In the present study, the pilot pump has been designed and manufactured for the high temperature of $600^{\circ}C$ by the equivalent circuit materials and the consideration of the materials and functions. The length and diameter of the pump are given as 84 cm and 10 cm each due to the fixed geometry of the circulation system to be installed. The characteristic of the developing pressure and efficiency is found out by using Laithewaite\`s standard design formula. It is shown that the developing pressure and efficiency are maximized at the frequency of 15 Hz from the curve. The annular channel gap of 3.95 mm is selected in the range of the reasonable hydraulic frictional loss. The components of the pump consist of the material for the high temperature. And then, the pump is manufactured to have the nominal flowrate of 40 1/min and developing Pressure of 1.3 bar.

• 자연과학논문집
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• 제7권
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• pp.19-25
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• 1995

본 연구에서는 온도 77K로부터 1,000K 사이에서의 $NiAl_0.8Fe_1.2O_4$Mossbauer 효과가 다루어졌다. Mossbauer spectra는 저온에서 준강자성에 의한 6선과 상자성에 의한 2중선으로 중첩되어 나타났다. 온도에 따른 효과는 $NiAl_0.8Fe_1.2O_4$의 자기적 성질이 온도상승에 따라서 ferrimagnetism으로부터 palamagnetism으로 변화되는 것으로 밝혀졌다. 그리고 자기완화 현상은 초상자성 효과에 의한 것으로나타났다.

• 한국광학회지
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• 제26권1호
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• pp.1-8
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• 2015

심혈관 질환은 심장마비의 가장 흔한 원인으로 관상동맥의 협착으로 심근에 산소와 영양분을 제대로 공급하지 못하게 되어 발생하게 된다. 이를 내과적으로 치료하기 위해 심혈관 중재술이 시행되는데 이때 스텐트 삽입 여부, 위치, 크기, 그리고 스텐트 삽입 후 혈관벽과의 밀착 여부를 평가하기 위해 혈관 내 광간섭단층촬영(OCT, optical coherence tomography) 내시경 진단검사를 시행한다. 본 논문에서는 이러한 심혈관 OCT 원리와 기술 동향, 그리고 실제 의료현장에서 심혈관 OCT의 임상적 응용 및 활용가치를 소개하고자 한다.

• 약학회지
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• 제25권1호
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• pp.1-7
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• 1981

Glycyrrhizin (GA) content in licorice was determined by a couple of methods using HPLC, respectively. In Method(I), GA content itself was determined from the licorice aqueous extract, while in Method (II) glycyrrhetinic acid (GHeA ; the aglicone of GA) content corresponding to the quantity of GA was measured from the chloroform extract of the hydrolyzed product of licorice aqueous extract. A reverse phase column Hibar Lichrosorb RP-18 (E. Merck) was used as the stationary phase. As the mobile phase MeOH: $H_{2}O$(0.05M-$NaH_{2}PO_{4}$)=58 : 42 solution in Method (I), and MeOH: $H_{2}O $: AcOH=78; 19: 3 solution in Method (II) were suitable, respectively. The value obtained by Method (II) appeared slightly higher than that by Method (I). The effect of some other herbal drugs on the assay of GA quantity in mixed sample was also observed in both above two methods. By Method (I) Cassiae Cortex, Rehmaniae Rhizoma, Paeoniae Radix, and Angelicae Radix gave the subtractive effect on the amount of GA compared with the value from licorice alone. In the case of Method (II) Cassiae Cortex and Rehmaniae Rhizoma appeared to have subtractive effect but Paeoniae Radix and Angelicae Radix scarcely showed any influence. Pachymae Fungus did not affect the GA content at all. It seems that glycyrrhizin in licorice interacts with certain components of other herbal drugs.

• 한국산학기술학회논문지
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• 제16권11호
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• pp.7508-7512
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• 2015

뇌파로 의도를 접속하여 기계를 작동하는 뇌-기기 접속(Brain-Computer Interface, BCI) 기반의 인간-로봇상호작용(Human-Robot Interaction, HRI) 플랫폼을 제안한다. 사람의 뇌파로 의도를 포착하고 포착된 뇌파 신호에서 의도를 추출하거나 연관시키고 추출된 의도로 기기를 작동하게 하는 포착, 처리, 실행을 수행하는 플랫폼의 설계, 운용 및 구현 과정을 소개한다. 제안된 플랫폼의 구현 사례로 처리기에 구현된 상호작용 게임과 처리기를 통한 외부 장치 제어가 기술되었다. BCI 기반 플랫폼의 의도와 감지 사이의 신뢰성을 확보하기 위한 다양한 시도들을 소개한다. 제안된 플랫폼과 구현 사례는 BCI 기반의 새로운 기기 제어 작동 방식의 실현으로 확장될 것으로 기대된다.

• The Journal of Korean Physical Therapy
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• 제15권1호
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• pp.119-154
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• 2003

In this paper, the proprioceptive sensitivity was compared by Foot-Hand task method and the effect of the proprioceptive sensitivity and auditory to the standing position between blind and normal children was measured using BPM for 56 children in 7, 8, 9 and 10 years old. There are three measurement methods are used for BPM : Rest, Forward Looking, 'Sound' position. The following conclusions were obtained from the above measurements. 1. In comparison of proprioceptive sensitivity between blind and normal children, there is no significant difference(p > .05). There is no significant difference in comparison of each age group and also there is no difference in each gender group(p > .05). 2. In comparison of standing position measurement between blind and normal children, there is any difference (p > .05) in three measurement(Rest, Forward Looking, 'Sound' position) but there is no significant difference in each gender difference(p > .05). There is any difference between Rest and 'Sound' position of blind children, also there is any difference between Forward Looking and ' Sound ' position, rest and 'Sound' position of normal children(p > .05). 3. There is no significant difference of correlation between proprioceptive sensitivity test and standing position measurement in Pearson correlation coefficient(p > .05).

• 대한물리의학회지
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• 제3권3호
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• pp.161-167
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• 2008

Purpose : The purpose of this study was to evaluate the effect of kinesio taping and wrist supporter on grip strength. Methods : The subjects for this study were thirty three young healthy people. To find out the effectiveness of kinesio taping and wrist supporter, divide three treatment method. Subjects measure the normal grip strength and then put on the kinesio taping and wrist supporter on wrist. Results : The results were as follow : 1. There were statistical significance on the grip strength with taping group(p<0.05). 2. There were statistical significance on the grip strength with wrist supporter group(p<0.05). 3. Taping group was more statistical significance than wrist supporter group on the grip strength. Conclusion : Supporter and taping on wrist were effective in grip strength.

• 한국식품과학회지
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• 제4권2호
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• pp.95-99
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• 1972

진공포장과 극저온에서의 중선량조사가 우육의 저장성 및 육색에 미치는 영향을 연구하기 위해 aluminum foil로 진공포장하고 0.25 Mrad와 0.5Mrad로 조사한 후 $5^{\circ}C$에서 저장했다. 저장 중 우육의 신선도와 육색소의 변화를 경시적으로 측정했다. 우육의 shelf life는 0.5Mard조사로써 비조사육보다 약 10일간 연장되었고 조사취는 나지 않았다. 또한 육색소도 방사선조사에 의하여 약간의 퇴색을 초래했으나 곧 회복되어 약 20시간 후에는 90%의 Mb을 나타냈다.

• 한국멀티미디어학회논문지
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• 제20권5호
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• pp.731-739
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• 2017

Distributed compressed video sensing (DCVS) is a framework that integrates both compressed sensing and distributed video coding characteristics to achieve a low complexity video sampling. In DCVS schemes, motion estimation & motion compensation is employed at the decoder side, similarly to distributed video coding (DVC), for a low-complex encoder. However, since a simple BCS-SPL algorithm is applied to a residual arising from motion estimation and compensation in conventional MC-BCS-SPL (motion compensated block compressed sensing with smoothed projected Landweber) scheme, the reconstructed visual qualities are severly degraded in Wyner-Ziv (WZ) frames. Furthermore, the scheme takes lots of iteration to reconstruct WZ frames. In this paper, the conventional MC-BCS-SPL algorithm is improved to be operated in more effective way in WZ frames. That is, first, the proposed algorithm calculates a correlation coefficient between two reference key frames and, then, by selecting adaptively the reference frame, the residual reconstruction in pixel domain is performed to the conventional BCS-SPL scheme. Experimental results show that the proposed algorithm achieves significantly better visual qualities than conventional MC-BCS-SPL algorithm, while resulting in the significant reduction of the decoding time.