직물의 Drape 특성과 Flare Skirt 의 헴라인 단면 형상

이수정,김연희,홍정민,이송자 ( Su Jeong Lee,Yeon Hee Kim,Jeong Min Hong,Song Ja Lee ) 대한가정학회 1995 Family and Environment Research Vol.33 No.4

세라믹-금속 브레이징 접합조인트의 고온 접합강도에 관한 연구

이수정,정명영,이대길,구형회,Lee, Su-Jeong,Jeong, Myung-Yeong,Lee, Dai-Gil,Goo, Hyung-Hoi 대한기계학회 1996 大韓機械學會論文集A Vol.20 No.2

Four point bending tests of the brazed joint composed of sintered silicon nitride and 0.2% carbon steel with Cusil ABA filler which were fabricated at 86$0^{\circ}C$ were performed at temperatures, 25, 100, 200, 300, 400, 50$0^{\circ}C$ From the experiments, the maximum bending strength was measured at 30$0^{\circ}C$ From the 3D FE analysis of the residual stress of the brazed joint, it was revealed that the thermally induced residual stresses were minimized when the environmental temperature was 35$0^{\circ}C$ Considering the degradation of the filler material at high temperatures, it was calculated that the maximum bending strength of the brazed joint occured just below the temperature of the minimum thermal residual stress and the thermal residual stress was the dominative parameter of the brazed joint.

원형 Single Lap 접착 조인트의 파괴 모델에 관한 연구

이수정,이대길 ( Su Jeong Lee,Dai Gil Lee ) 한국복합재료학회 1992 Composites research Vol.5 No.1

세균성 뇌수막염에서 뇌척수액 Latex 응집 추적검사의 유용성

이수정,안소현,조수진,김혜순,이승주,Lee, Soo Jeong,Ahn, So Hyun,Cho, Su Jin,Kim, Hae Soon,Lee, Seung Joo 대한소아청소년과학회 2003 Clinical and Experimental Pediatrics (CEP) Vol.46 No.4

목 적 : 세균성 뇌수막염은 높은 사망률과 후유증을 가져오는 심각한 소아에서의 감염성 질환 중 하나이다. 본 연구에서는 이미 알려진 뇌척수액 latex 응집검사의 진단적 가치 외에도 추적검사에서 예후 예측 인자로서 유용성을 알아보고자 하였다. 방 법 : 1997년 1월부터 2002년 6월까지 세균성 뇌수막염으로 진단받고 이화의대 목동병원에서 입원치료 받았던 25명의 환아들중 뇌척수액 세균배양검사와 latex 응집검사가 모두 양성이었던 19명을 대상으로 하였다. 의무기록에서 임상증상, 뇌척수액 소견, 방사선학적 소견 그리고 신경학적 후유증에 대해 조사하였다. 뇌척수액 추적검사는 항생제 치료 후 3, 7, 14, 21일 그리고 28일에 시행하였고, 3일째 음성이 된 환아들을 I군으로, 3일 이후에도 지속적으로 양성으로 남아있는 환아들을 II군으로 나누었다. 결 과 : 대상 환아 19명의 평균 나이는 $10.6{\pm}12.3$개월(2-33개월)이었고, 원인균으로는 H. influenzae type b 11명(57.9%), Group B Streptococcus 4명(21.1%), S. pneumoniae 3명(15.7%), 그리고 E. coli 1명(5.3%)이였다. I군은 10명(52.6%), II군은 9명(47.4%)이였다. 뇌척수액 추적검사에서 세균배양검사는 3일째 모두 음성화되었고, latex 응집 추적검사는 3일째 9명(47.4%)에서 양성이었고, 7일째 31.6%, 14일째 26.3%, 21일째 10.5%에서 양성이었고, 28일째에 모두 음성이 되었다. I군에서는 2명(20.0%)에서 경막하삼출 소견을 보였다. II군에서는 9명(100.0%) 모두에서 경막하 삼출을 보였고, 이 중에서 44.4%에서 뇌수종 또는 뇌연화 소견을 보였다. 신경학적 후유증은 II군에서 감각신경성난청 1명, 경련성 질환 1명 그리고 우측반신마비 1명이 발생했고, I군에서는 발생하지 않았다. 결 론 : 세균성 뇌수막염 치료 시 뇌척수액 latex 응집 추적검사를 실시하는 것은 치료 초기에 신경학적 예후를 예측하는데 유용하였다. Purpose : Bacterial meningitis is a serious infection of childhood associated with a significant morbidity and mortality. Repeated cerebrospinal fluid(CSF) examination is a useful prognostic indicator and a delayed sterilization is associated with a higher incidence of neurologic abnormalities. In this study we tried to determine the prognostic value of repeated CSF latex agglutination testing. Methods : We retrospectively evaluated 19 patients admitted to Ewha Womans University Mokdong Hospital for bacterial meningitis from January 1997 to June 2002. Bacterial meningitis was confirmed by a positive CSF culture and a positive CSF latex agglutination test. Repeated CSF examinations were done at three, seven, 14, 21 and 28 days after antibiotics therapy. Neuroradiologic studies were performed. Results : The mean age was $10.6{\pm}12.3months$(range; two to 33 months). The male to female ratio was 2.8 : 1. The causative organisms were Haemophilus influenzae type b 57.9%, Group B Streptococcus 21.1%, Streptococcus pneumoniae 15.7% and Escherichia coli 5.3%. Three days after the initiation of antibiotics therapy, repeated CSF latex agglutination tests persisted as positive in nine (47.4%) out of 19 cases, but all CSF cultures became negative. In those cases with negative latex agglutination tests three days after antibiotics therapy, neuroradiologic findings were completely normal. But, in cases with positive latex agglutination tests three days after antibiotics therapy, neuroradiologic abnormalities such as cerebral infarction, encephalomalasia occurred in 44.4%. Conclusion : Repeated CSF latex agglutination testing was valuable as a prognostic factor in bacterial meningitis. Neuroradiologic abnormalities may occur in cases with delayed clearance of CSF latex agglutination tests more often than in cases with negative latex agglutination tests three days after antibiotics therapy.

Nd:YAG 레이저 조사시 치근면에 미치는 효과에 관한 주사전자현미경적 연구

이수정,김수아,서석란,김형섭,Lee, Su-Jeong,Kim, Soo-Ah,Seo, Seok-Ran,Kim, Hyung-Seop 대한치주과학회 1997 Journal of Periodontal & Implant Science Vol.27 No.3

The purpose of this study was to evaluate the in vitro effects of Nd:YAG laser irradiation on removal of a root surface smear layer after root planing in comparison with Tetracycline HCl. The 60 extracted human teeth due to severe periodontal disease were vigorously scaled and root planed with Gracey curet. Thirty specimen($5{\times}5{\times}2mm$) were obtained from root planed surface of 30 human teeth and assigned randomly to one of three groups : root planed group(5 specimen), Tetracycline HCI group(5 specimen, burnished for 5 minutes), and Nd:YAG laser group(25 specimen, German Dental Laser, Fotona Twinlight). Nd:YAG laser group was divided into 4 subgroups according to power of 1W, 1.5W, 2W, 3W at frequency to 10Hz. The specimen were then fixed, and examed by Scanning electron microscopic study. 30 of 60 human teeth used to measurement of the intrapulpal temperature rise during laser irradiation. Laser-irradiated surface exhibited various surface texture from relative flat surface to irregular surface with patent dentinal tubules of various shape and size. In some area, the root surface alteration which are carbonization, pit and crater formation and melting and resolidification were observed. The number of exposed dentinal tubules per unit($100_{\mu}m^2$) on tetracycline HCI group was more than that in the laser group below 1.5W of power(150mJ/pulse) and was significantly less than that in laser group above 2W of power(200mJ/pulse)(P<0.OOl). As power increased the intrapulpal temperature rise also increased. The result suggested that the parameter which effectively remove root surface smear layer than tetracycline HCI may cause thermal damage to pulp and root surface alteration result from laser exposure would indicate need for additional instrumentation. Thus, Nd:YAG laser irradiation in these parameter may not be appropriate for clinical use as adjunct to conventional periodontal therapy.

핀테크 산업에서 블록체인 도입의 한계점

이수정,변혜민,박유리,전정훈,Lee, Su-Jeong,Byeon, Hye-Min,Park, Yu-Ri 한국정보처리학회 2017 정보처리학회지 Vol.24 No.3

가미사칠탕(加味四七湯)으로 호전된 우울증으로 인한 식욕부진 환자 치험 1례

이수정,하정빈,양지수,유재환,Lee, Su-jung,Ha, Jeong-been,Yang, Ji-soo,Lew, Jae-hwan 대한한방내과학회 2021 大韓韓方內科學會誌 Vol.42 No.5

Objectives: This study examined the effects of Gamisachil-tang on an anorexic patient with depression. Methods: A patient suffering from anorexia and depression was treated with Korean herbal medicine (Gamisachil-tang) for 14 days. To evaluate the therapeutic effect, we measured the daily food intake of the patient and used the Visual Analogue Scale (VAS) for anorexia. Results: Following treatment, both the patient's daily food intake of the patient and VAS score for anorexia had improved. Conclusion: These results suggest that Gamisachil-tang has a beneficial effect on both anorexia and depression.

연구용 CAD툴에 의한 소형 MPU의 설계 및 파이프라인화의 고찰

이수정,박도순,송낙윤,Lee, Su-Jeong,Park, Do-Sun,Song, Nak-Yun 한국정보처리학회 1994 정보처리논문지 Vol.1 No.4

본 논문에서는 연구용 VHDL 및 CAD 툴을 사용하여 톱다운 설계방식에 의하여 소 형 마이크로프로세서(MPU;microprocessor unit)의 설계를 수행한다. 이를 위하여 기본 MPU와 이의 파이프라인화 구조를 제안한다. 설계목표와 명령어, 아키텍쳐가 결정되면, 이를 우선 C 언어로 모의실험하여 동작을 확인하며, 다음 VHDL 모의실험의 경우, 주어 진 입력에 대하여 내부 레지스터의 내용을 점검하여 동작을 확인한다. 다음에, 이를 연구용 CAD 툴에 의해 완전주문형(full-custom)/반주문형(semi-custom) 설계방식에 의해 레이아웃을 수행하며 관련 모의 실험을 수행한다. 이어 성능개선을 위하여 제안 한 파이프라인 구조를 모의실험을 통하여 타당성을 확인하며 아울러 관련 문제점 및 향후 연구방향에 관해 논한다. 결론적으로, 본 논문을 통하여 MPU의 설계방법을 정립 하였으며, 아울러 성능개선을 위한 아키텍쳐의 설계변화가 가능하였다. In this paper, design of small microprocessor unit is implemented using research purpose VHDL and CAD tools by top-down design method. For this, original basic MPU and its pipelining architectures are suggested. Once, design target, instruction sets, architecture are decided, the operation is confirmed by C language simulation, and then the operation is confirmed by checking internal register contents for given inputs in the case of VHDL simulation. Then, design layouts are made by full/semi-custom design methods by research CAD tools and related simulation is implemented. The feasibility of suggested pipelined structure for performance improvement is confirmed by simulation, and related problems and future research directions are discussed. In conclusion, the MPU design methodology is set up and the design change of architecture is possible by this paper.

한반도 남부지역에서 산출되는 카올린광물의 고온영역에서의 광물학적 특성 연구

이수정,문희수,Lee, Su-Jeong,Moon, Hi-Soo 대한자원환경지질학회 1996 자원환경지질 Vol.29 No.3

Dehydroxylation and mullitization of primary and secondary kaolins were investigated in order to compare and understand the differences in thermal behaviours by DTA and TG up to $1,100^{\circ}C$. Chemical analyses and EPMA of the samples revealed nearly ideal unit-cell formulae of kaolins. The weight losses of dickite and halloysite are 14% and 12.5% on the average, respectively. The activation energies of dehydroxylation of kaolin minerals were calculated according to Kissinger's approach which uses various heating rates in DTA to estimate the activation energy of thermal reactions. The activation energies of dehydroxylation of halloysites from Daemoung and Buksam mines are about $163kJmor^{-1}$ (white), $168kJmor^{-1}$ (pink), and $176kJmor^{-1}$ respectively. The activation energies of dickites collected from Sungsan and Ogmae mines are about $166kJmor^{-1}$ and $387kJmor^{-1}$. The asymmetric shape of endothermic peak in DTA, the relative intensities of OH-stretching bands in FTIR spectroscopy and the existence of residual XRD peaks of the samples which were heated at $550^{\circ}C$ for 2 hours indicate that Sungsan dickite may be more disordered than Ogmae dickite. The new phase formed in thermally treated samples in the range of $900^{\circ}C$ to $1,100^{\circ}C$ was identified as mullite by XRD on the basis of disappearing of the characteristic peaks of kaolins and increasing of amorphous background upon heat treatment. On further heating, loss of more water from dehydroxylate resulted in the formation of mullite and the characteristic X-ray diffraction patterns of mullite began to appear at about $900{\sim}1,000^{\circ}C$ in kaolins.

카올리나이트의 상전이반응 과정 연구

이수정,김윤중,문희수 ( Su Jeong Lee,Youn Joong Kim,Hi Soo Moon ) 한국광물학회 1998 광물과 암석 (J.Miner.Soc.Korea) Vol.11 No.1