하치조신경 및 설신경 손상 평가를 위한 한국인 정상 성인의 하순-이부 및 혀의 감각 조사

이종호,이세영,송승일,이은진,안강민,김성민,명훈,황순정,서병무,최진영,정필훈,김명진 大韓顎顔面成形再建外科學會 2003 Maxillofacial Plastic Reconstructive Surgery Vol.25 No.2

In the head and neck area, there are so many sensory nerves, which are sometimes injuried iatrogenically or inadvertently so that involved patients complained of the loss of sensations. In such cases, it is important to judge the degree of injuries and regeneration of nerve for better diagnosis and treatment. Seddon and Sunderland's classification, which is commomly used, is focused on histological change and nerve conduction. As times goes by, it is difficult to access patient's sensory disturbance by this method. Until now, so many methods such as contract threshold, direction, two-point discrimination, pin prick, thermal discrimination and current perception threshold have been introduced for sensory evaluation. However, there hasn't been enough information regarding each methodology nor integrated standard methodology for the measurement. the purpose of this study is to get Korean adult normative sensory values of lower lip,chin and tongue using modified methods of contact thershold, ditection, two point discrimination, pin prick, thermal discrimination and assess degree of regeneration of sensory nerve damage.

비복신경이식을 이용한 긴 거리의 말초신경 결손부 수복

이종호,이세영,김명진,이은진,안강민,김성민,최원재,명훈,황순정,서병무,최진영,정필훈 大韓顎顔面成形再建外科學會 2003 Maxillofacial Plastic Reconstructive Surgery Vol.25 No.2

The surgery of oral and maxillofacial area poses the risk of cranial nerve damage such as trigeminal nerve or facial nerve. Inferior alveolar nerve is prone to damage in the third molar extraction, implant installation, orthognathic surgery, open reduction and rigid fixation, and tumor ablation surgery. On the other hands,facial nerve is likely to be damaged or sacrificed with trauma or parotidectomy. In case of inferior alveolar nerve injury, the incidence is reported to be about 1.3%. The nerve function will almost recover in minimal damage, but it won't recover at last in total damage of a part of nerve unit. In latter cases, nerve regeneration in intended by allograft as nerve substitute or various route of merve condit. But the recovery with autograft is believed to be most relialbe mrthod in the rapair of long-span(longer than 15㎜)nerve defect. We have performed autologous sural nerve graft in the repair of nerve defect, which is caused by resection of benign or malignant tumor. Hereby we report the method of nerve harvesting, recovery of defected peripheral nerve and the complications of donor site with the discussion of sural nerve anatomy.

정확한 완충기체효과가 적용된 질량분석원리에 대한 다중입자 분석 전산시늉

이유용,이원욱,오차환,김필수,송석호 한양대학교 자연과학연구소 2001 自然科學論文集 Vol.20 No.-

질량분석기로 사용되는 폴 트랩 내에서 보다 실제적인 이온운동을 예측해내기 위하여 약 2천 개의 다중입자의 궤적에 대한 계산을 실시하였다. 보다 정확한 질량 분석스펙트럼을 얻기 위하여 충돌확률에 대한 보다 정확하고 실질적인 함수 값을 도입하였다. 계산된 전산시늉의 결과들로부터 특히 작은 질량의 영역에 대한 분석을 할 경우 본 논문에서 제시된 바와 같이 매우 정확한 충돌확률이 고려되어야 함을 확인할 수 있었다. To predict the practical characteristics of ion motion in the paul trap as a mass spectrometer, the ion trajectories of the multi-particle(over than 2000 particles) were calculated. In order to expect more practical mass spectrum, the exact expressions for the collision probability was adopted. From the simulation result, we found that the exact collision probability has to be considered to analyze the materials existed in the low mass region.

自勵磁 制動과 磁氣 制動을 이용한 3相 誘導電動機의 2段 制動 技法

李殷榮,金龍,金必洙,白壽鉉 동국대학교 산업기술연구원 1998 산업기술논문집 Vol.11 No.-

3상 유도전동기의 여러 응용에는 안전하고 저렴한 제동이 필요로 된다. 외부 에너지원을 필요로 하는 유도전동기의 대표적인 제동 방법인 기계적 마찰 제동은 안전하지 못하고 고가이며 유지보수가 필요하다. 본 연구에서 제안한 3상 유도전동기의 2단 제동법은 구성이 비교적 간단하며 비용이 저렴하다. 제시한 제동방법을 靜ㆍ動的으로 분석하여 분석한 결과를 나타내었으며, 시뮬레이션 파형과 실측 파형을 비교하였다. In this paper, two-stage brake scheme is proposed. In several applications, a low cost and effective brake is required for three-phase induction motor. A mechanical friction brake, typical braking method for induction motor requires external energy sources which is not safe, expensive and requires maintenance. Static and dynamic analyses of the proposed brake scheme are along with analytical result, simulated waveforms and experimental waveforms are compared.

한양대학교 서울 캠퍼스 도로주변 건물내의 교통소음영향평가

李昌孝,金弼洙 漢陽大學校 環境科學硏究所 1988 環境科學論文集 Vol.9 No.-

한양대학교 서울 캠퍼스의 도로주변에 있는 건물내에서의 도로교통소음 영향을 평가하였다. 도로쪽에 창문이 있는 강의실과 실험실들의 ??값은 창문을 닫은 경우에는 모두 권장허용치 50㏈A보다 낮게 측정되었다. 그리고 ??값은 창문을 열어 놓은 상태에서도 57㏈A이하로 측정되어 양호한 대화환경인 것으로 평가되었다. 결론적으로 서울 캠퍼스의 도로주변 건물내의 소음영향평가는 양호한 것으로 판단할 수 있다. Road traffic noise has been rated in road-side buildings at Hanyang University in Seoul. A-weighted noise level(??) in classrooms and laboratories of which windows face the road are recorded values lower than the recommended acceptable noise level, i.e, 50㏈A when windows are closed. A-weighted voice levels(??) in the buildings, even though the windows are open, are measured values less than 57㏈A. Therefore, the noise of the road-side buildings at the Hanyang University in Seoul can be rated as being excellent for unassisted speech communication.

외부광궤환에 의한 레이저 다이오드의 출력특성

이세영,오차환,김필수,황의중 漢陽大學校 自然科學硏究所 1997 自然科學論文集 Vol.16 No.-

외부 광궤환 반도체 레이저의 출력 특성을 비율방정식의 수치해를 이용하여 분석하였다. 출력의 세기와 위상과 전자밀도를 시간에 대한 함수로 알아보았다. 또한 bifurcation diagram과 phase diagram을 통하여 궤환비율 k에 따른 레이저의 동작 특성을 조사하였다. 궤환광이 없을때는 이완발진이 감쇄한 후 안정한 출력특성이 나타나지만 되먹임 비율이 증가하면서 안정한 해의 갯수가 증가하다가 ??????이상의 매우 강한 광궤환에서는 출력특성이 극도로 불규칙해지고 무수히 많은 해를 갖는 혼돈현상이 나타남을 알 수 있었다. The output characteristics of a laser diode with external optical feedback were analyzed by numerical solutions of rate equations. The output power, phase and carrier density were plotted as a function of time. Dynamics of external cavity laser were investigated by the bifurcation diagram and the phase diagram with respect to the feedback rate k. If there was no feedback, relaxation oscillation reduced and laser showed stable output. For increasing feed back level, the number of stable state was increased. In very strong feedback rate above ??????, laser output showed extremely unstable and chaotic behavior.

대기 Aerosol의 입도측정에 의한 시정의 계산

김필수,이애경,윤송현 漢陽大學校 環境科學硏究所 1990 環境科學論文集 Vol.11 No.-

대기 aerosol의 크기별 입자수를 측정하고 Mie 이론을 써서 시정을 계산하였다. 1988년 3월과 4월에 입자직경 0.01∼10㎛ 범위의 aerosol을 측정하고 가시광선에 대한 소산효율과 소산계수를 구하였다. 입자직경이 0.1㎛보다 작을 때에는 aerosol이 소산과 시정에 거의 영향을 미치지 않으나 직경 0.1∼1.0㎛ 범위의 aerosol 입자에 의해서는 큰 영향을 받았다. 황사의 영향을 받은 4월에는 1.0㎛ 이상의 큰 입자의 수가 증가함에 따라 소산계수의 뚜렷한 증가를 가져왔다. 따라서 4월의 시정감소는 황사의 영향을 크게 받았음을 알 수 있었다. 소산계수와 시정의 일변화는 aerosol의 크기별 농도, 대기오염, 대기의 성질에 따라 달라졌다. Visibility was calculated using the Mie theory from measured aerosol size distribution. Aerosol was sampled and measured in the size range of 0.01∼10㎛ in March and April, 1988 in order to obtain extinction coefficient for visible light. The calculated light extinction coefficient and visibility showed that they were little affected by fine particles of diameter less than 0.1㎛, while they were greatly influenced by particles of diameter range of 0.1∼1.0㎛. In April, the extinction coefficient was increased remarkably by particles of diameter larger than 1.0㎛, when Hwangsa(aeolean yellow sand) appeared. Therefore, it was known that the visibility degradation in April was closely related to Hwangsa. The diurnal variations of extinction coefficient and visibility were dependent on the aerosol concentration, air pollution, and atmospherid properties.

상태 전이 그래프를 기반으로 한 논리회로 시뮬레이터의 설계

노찬숙,이필우 우송대학교 부설 산업연구원 1999 산업연구 Vol.1 No.2

일반적으로 VHDL을 비롯한 많은 하드웨어 기술언어(hardware description language)로 기술된 하드웨어를 시뮬레이션하기 위한 계산비용은 대단히 크며 많은 양의 계산을 필요로 한다. 이런 하드웨어 시뮬레이션시의 처리과정을 정밀하게 분석해 본 결과, 하드웨어의 기술 전체가 적당ㅇ한 크기의 모듈로 분할되어 있으면, 각 모듈의 상태전이(state transition)의 패턴은 그다지 많지 않다는 것을 알았다. 따라서 패턴이 처음 발생했을 때 시뮬레이터에 동적으로 보존하여, 시뮬레이션 중에 같은 패턴이 반복될 경우 보존한 패턴을 이용함으로써 시뮬레이션에 필요한 계산을 대폭 감소시킬 수 있다는 결론을 얻었다. 본 논문에서는 논리회로 시뮬레이션시의 상태의 동적 보존과 재 이용의 방식에 대하여 설명하고, 몇 가지의 시뮬레이션 결과를 가지고 본 방식의 유효성에 관하여 평가하고자 한다. Analyzing the simulation process of logic circuits closely, we found that appeared simulation states are limited on condition that the size of hardware modules is restricted properly. The state sequences are preserved dynamically as state transition graphs when they appeared at the first occurrence, and the graphs can be utilized in the later simulation to reduce the simulation time, replacing the scratch simulation by the corresponding preserved states. the state transition graphs can be reduced further when the states have no changes of output signals from the modules.

치과 치료 경험이 아동의 치과의사와 치과 치료에 대한 태도에 끼치는 영향에 관한 조사 연구

허용욱,이광희,문필성,김대업 大韓小兒齒科學會 1996 大韓小兒齒科學會誌 Vol.23 No.2

The purpose of this study was to investgated the effect of dental experience the attitude of children toward the dentist and the dental treatment.The subject of the study were 1,090 children from second grade to forth grade of three elementary schools of the Iksan city.The children were investgated by the questionnaire which cosisted of seven items about the attitude toward the dentist,the attitude toward the dental treatment,the dental treatment experience,the number of times of dental treatment,the last time of the dental visit,pain of dental treatment,and fear of dental treatment. There were significant differences among the grades in the attitude toward the dental treatment and in the attitude toward the dentist(P<0.01).Second grade children had the most negative attitudes.But,there were no differences between boys and girls.Girls felt more pain and fear than boys(P<0.01).There were significant relationships between the pain and the attitude toward the dentist,between the pain and the attitude toward the dentist, and between the fear and the attitude toward the dental treatment(P<0.01,all).The number of dental visit had significant relationship with the attitude toward the dental treatment(P<0.05).There was significant relationship between the pain and the fear between the attitude toward the dentist and the attitude toward the dental treatmen.

Helicobacter pylori 편모 유전자의 클로닝 및 염기서열 분석

이광호,이우곤,조명제,도영미,백승철,강경희,박필성,이상룡 경상대학교 유전공학연구소 1993 遺傳工學硏究所報 Vol.12 No.-

A λgt11 expression libary of H. pylori DNA in E. coli Y1090 was screened with flagellin-specific rabbit antiserum for molecular cloning of the flagellin gene of H. pylori. A positive clone, λHPF4, was obtained and the recombinant antigen expressed from λHPF4 was a fusion protein with the molecular weight of 168kd. Sequence analysis of antigen-encoding DNA showed that an open reading frame composed of 1,536 nucleotides encodes a polypepride with a oredicted molecular size of 54kd. This open reading frame did not show the homology with flaA gene encoding 56kd protein of H. pylori and was confirmed as a unique sequence through homoligy searching. Therefore, the cloned antigen is supposed to be the carboxy-terminal region of the other flagellin protein of H. pylori, flaB, with the molecular weight of 58kd.