[A Story by Lee Bong-gu] The Smell of Death

Lee Bong-gu,Chang Wang-rok(번역자) The Academy of Korean Studies 1968 Korea Journal Vol.8 No.1

매크로/마이크로 레벨 볼트 결합 구조물에서의 실험적/해석적 방법을 통한 시스템 특성 비교

김봉석,이성민,이문구,이수훈,Jun Ni,송준엽,이창우,하태호 한국공작기계학회 2006 한국공작기계학회 추계학술대회논문집 Vol.2006 No.-

As the micro technology and miniaturization of a structure and component in the last couple of decades have been concretely realized, the understanding of structural and dynamic characteristics and prediction of dynamic behavior are indispensable to the miniaturized structures and micro machines. This paper shows the effect of dynamic characteristics in bolt-jointed structures by comparing natural frequencies and mode shapes between macro and micro-scale beams through experimental modal analysis and finite element analysis with a1 8 test models by materials, by size, and by joining condition; that is, SS41 and A16061-T651, micro and macro, and monolithic beam and bolt-jointed beam.

돼지 우리 깔집용 왕겨에서의 Ochratoxin A 검출

이문한,박진봉,박응복,이영재,신광순,박종명,남궁선,조준형,박근식,권택석,이재구 한국수의공중보건학회 1992 예방수의학회지 Vol.16 No.1

급성 가쪽연수경색 환자에서 나타난 배뇨 장애 1예

이원구,김명국,유봉구 고신대학교 의과대학 2010 고신대학교 의과대학 학술지 Vol.25 No.1

Although the urinary dysfunction was associated with a pontine lesion in most cases, information about the precise anatomic localization was limited. Furthermore, micturitional disturbance has rarely been reported in patients with lateral medullary infarction. A 74-year-old man developed difficulty in initiation of voiding, swallowing difficulty and dysarthria for 1 day. Neurological examination revealed hypesthesia in the left face and right limbs and trunk, left eye ptosis and anisocoria, and left facial palsy. Diffusion-weighted MRI showed acute infarction in the left lateral medulla. Initial residual bladder volume after voiding was 800 mL. Urodynamic study showed flaccid type of neurogenic bladder. After 2 weeks, his voiding symptom has been nearly recovered with little residual urine (100 mL). Urinary retention can be easily overlooked in many patients with unilateral medullary infarction because of its transience or clinical inattention. This case suggested that urinary retention might be caused by interruption of descending fibers from facilitatory pontine tegmentum micturition centers.

국내에서 유행하는 HIV의 전파 경로에 따른 Subtype 분포

이주실,남정구,김성순,강춘,최병선,김옥진,박미선,성봉모,서순덕,전수경,변승옥,신영오,조해월 대한감염학회 2001 감염 Vol.33 No.5

Background : Previous data have been reported that subtype B is prevalent in South Korea, but neither the extent nor the proportion of subtypes could be evaluated. This study was designed to analyze the distribution of HIV-1 subtypes, temporal instructions and transmission dynamics between epidemiological groups. Methods : 1,280 Koreans had been diagnosed as HIV seropositive during the period 1985 to 2000. Among them, 134 individuals were selected for this molecular epidemiological study. 134 DNAs were isolated from uncultured or cultured peripheral blood mononuclear cells. V3-V5 (0.7 kb) fragment of HIV-1 env gene was amplified by nested polymerase chain reaction and was sequenced. Results : HIV-1 isolates from thirty-seven homosexuals were all subtype B (100%). On the other hand, 66 isolates from 94 heterosexuals were subtype B (70%) and 28 were non B subtypes (30% : 13 A, 4 C, 2 D, 8 E , 1 G). Only subtype B strains were isolated from 73 males who were infected with HIV inside Korea while 16 B and 20 non B subtype strains were isolated from 36 males who were HIV infected outside of Korea. However, B and non B strains were isolated half and half from females who were infected inside Korea except one. Conclusion : The HIV-1 subtype B strains are prevalent in Korea from the early HIV infection until present in both homo and heterosexuals. Non B strains have been transmitted from men who were infected outside Korea to their spouses and casual partners. So, we need further study to monitor subtype B and non B HIV transmission in epidemiological groups of Korea, (Korean J Infect Dis 33:311∼318, 2001)

정신과 환자에 수반된 신체 질환

李相求,韓弘武,張煥一 최신의학사 1975 最新醫學 Vol.18 No.11

While working with the psychiatric patients, Psychiatrists often find cases that need treatments for physical as well as psychiatric illness. In this regard, One hundred and seventy seven patients admitted to the Neuro-Psychiatric Ward of Kyung-Hee Univ. Hospital during the period of the year 1974, through, were studied and the following results were obtained. 1) Out of 177 neuropsychiatric patients, 105 patients were found to have accompanying physical illness. (59.32% of the patients) 2) Out of 105 patients who had accompanying physical illness, 31 were found to have occured during the hospitalizations, 59 were not aware of the physical illness at the time of admission, and 15 knew of the existence of the physical illness at the time of admission. 3) Classification of the physical illnesses reveald 20 cases (19%) of E. N. T. diseases, 17 cases (16. 2%) of skin diseasea, and 10 cases (9.5 %) each of respiratory and eye diseases respectively. 4) Eleven patients for whom treatment of physical illness was considered as more urgent than that of psychiatric illness were transfered to other departments. 5) Eight patients (7.6% of total physical illnesses) were considered to have contagious diseases. 6) Mean duration of hospitalization of the group with physical illness was 45 days, whereas the group without physical illness was 23 days. 7) Among the patients with accompaning physical illness, male outnumbered female at the rate of 72 to 33. 8) No significant difference was found in the eductional level between the two groups of patients. 9) Mean age of the patients with accmpanying physical illness was 34 years old and that of the patients without accompanying physical illness was 30 years old. The authors hope this report to be not only a warning to illegitimate negligence of physical aspect of health in psychiatric practice, but also a preliminary data for further studies of physical illnesses associated with psychiatric illnesses; the influence of physical illness on psychiatric illness, other reciprocal interrelationship between physical and psychiatric illness or it's therapeutic implications.

廢 乾電池로 부터 有價金屬의 循環利用

李成植,金種和,姜奉根,梁種奎 동아대학교 환경문제연구소 1991 硏究報告 Vol.14 No.1

The recovery and recycling of the rare metal from spent batteries have been investigated. It was proposed the synthetic processes of recovery of rare metal from various spent batteries, and spent batteries have to be considered as a resource and the collection system with separation should be established.

Probe 위치 변화에 따른 이음향방사의 변화

장봉익,이재욱,김상렬,강명구,김리석 대한이비인후과학회 1999 대한이비인후과학회지 두경부외과학 Vol.42 No.7

자율신경계의 활성도 측정을 위한 Data Acquisition System의 개발 및 임상응용

신동구,박종선,김영조,심봉섭,이상학,이준하 영남대학교 기초/임상의학연구소 2001 Yeungnam University Journal of Medicine Vol.18 No.1

Background: Power spectrum analysis method is a powerful noninvasive tool for quantifying autonomic nervous system activity. In this paper, we developed a data acquistion system for estimating the activity of the autonomic nervous system by the analysis of heart rate and respiratory rate variability using power spectrum analysis. Materials and methods: For the detection of QRS peak and measurement of respiratory rate from patient's ECG, we used low-pass filter and impedance method respectively. This system adopt an isolated power for patient's safety. In this system, two output signals can be obtained: R-R interval(heart rate) and respiration rate time series. Experimental ranges are 30∼240 BPM for ECG and 15∼80 BPM for respiration. Regults: The system can acquire two signals accurately both in the experimental test using simulator and in real clinical setting. Conclusion: The system developed in this paper is efficient for the acquisition of heart rate and respiration signals. This system will play a role in research area for improving our understanding of the pathophysiologic involvement of the autonomic nervous system in various disease states.

TDI계 수분산성 폴리우레탄 접착제의 특성에 Diisocyanate의 구조가 미치는 영향

강승구,송봉근,이재흥,박찬조,류해일 한국공업화학회 2003 공업화학 Vol.14 No.3

수년 전부터 많은 연구자들에 의해 폴리우레탄의 수용화, 수분산화의 연구가 수행되어 왔다. 그럼에도 불구하고 폴리우레탄의 특성에 디이소시아네이트가 구조에 미치는 영향에 대한 연구는 많이 진행되지 않았고 또한 미흡한 상태이다. 따라서 번 연구에서는 디이소시아네이트의 형태와 함량 변화에 따른 폴리우레탄의 특성을 연구하였다. 폴리우레1탄 수분산체(PUD)는 poly(tetramethylent ether) glycol (PTMG), isophorone diisocyanate (IPDI), toluene 2,4-diisocyanate (TDI), dimethylol propionic acid (DMPA), trethylamine (TEA) 등을 사용하여 제조하였다. 제조한 폴리우레탄 수분산체(PUD)의 구조를 FT-IR을 이용하여 확인하였다. 폴리우레탄 수분산체의 특성은 DSC, gel permeation chromatography (GPC), particle analyzer, universal testing machine (UTM) 등을 사용하여 측정하였다. 폴리우레탄 수분산체(PHD)에서 입자크기는 IPDI 함량이 증가할수록 작아지는 경향을 나타내었으며, 유리전이온도(Tg)는 IPDI 함량이 증가할수록 조금씩 낮아지는 경향을 나타내었다. 또한, 폴리우레탄 수분산체(PUD)의 접착세기 변화에서는 [NCO]/[OH] 몰비를 1.2로 유지되도록 하면서 합성에 관여하는 [NCO] 양에 해당하는 [TDI]/[IPDI] 몰비를 변화시켜 얻은 폴리우레탄 수분산체의 접착세기는 [TDI][IPDI] 몰비가 50/50일때 좋은 집착세기를 나타내었다. 또한 [NCO]/[OH] 몰비를 1.6으로 일정하게 유지되도록 하고 [TDI]/[IPDI] 몰비를 변화시켜 얻은 폴리우레탄 수분산체의 접착세기는 [TDI]/[IPDI] 몰비가 75/25일 때 좋은 접착세기를 나타내었다. Aqueous polyurethane dispersions (PUD) has been investigated by many researchers for a long time. However, relatively little systematic work has been reported, in detail, on the effect of structure of the diisocyanate on the properties of polyurethane. This work describes the properties of polyurethane in relation to the variation of diisocyanate type and contents. Aqueous polyurethane dispersions (PUD) were prepared from the poly(tetramethylene ether) glycol (PTMG), toluene 2,4-diisocyanate (TDI), isophorone diisocyanate (IPDI), dimethyol propionic acid (DMPA), and triethylamine (TEA). Differential scanning calorimetry (DSC), FT-IR, GPC, universal testing machine (UTM), and particle analyzer were utilized to characterize the physical and mechanical properties of PUD according to diisocyanate type and contents. As the content of IPDI in PUD increased, the particle size decreased. The glass transition temperatures (Tg) of PUT were shifted to a lower temperature as IPDI conent increased. When [NCO]/[OH] mole ratio was 1.2, the adhesion force of PUD shown the best result at [TDI]/[IPDI] mole ratio of 50/50. And, at [NCO]/[OH] mole ratio of 1.2, the adhesion force of PUD was the best when [TDIl/[IPDI] mole ratio was 75/25.