자동화학분석기 Hitachi 736-20과 Parallel^(�)의 비교 검토

김순기,김용남,박용성,이기문 대한임상병리사협회 2001 대한임상병리사회지 Vol.21 No.1

초고속망을 이용한 멀티미디어기반 종합 한방 원격 의료정보 시범시스템 구축

이용주,양옥렬 圓光大學校大學院 2000 論文集 Vol.24 No.-

한의학의 원격검진 및 한방의학 정보는 전통의학의 표준화 및 과학적 접근을 위해 전통한의학 정보 컨텐츠를 데이터베이스화하고 원격지에서의 한의진료가 가능하도록 하는 원격진료 통합 시스템을 개발함으로써 초고속통신망의 유용한 서비스를 제공하게 된다. 본 연구는 국민 대다수가 보편화된 한방 의료 서비스를 제공받을 수 있게 하는데 그 목적이 있으며 정형화된 데이터베이스를 통해 점차적인 한의학정보의 통합관리가 가능할 수 있도록 하였다. 또한 방대한 멀티미디어 정보를 효율적으로 검색할 수 있도록 하기 위해 시소러스를 통해 데이터베이스 정보의 균형잡인 서비스가 가능하도록 하는 질의 처리 시스템을 갖춘 멀티미디어기반 데이터베이스를 구축하였다. The goal of this research is to develop a Remote Medical Examination System on Oriental Medicine on the very high speed information communication network. We developed a remote medical examination system based on the sample examination data of 10 patients and develop the information of search database based on contents. We analyzed the sample data and the requirements of patients, doctors, and nurses. By the analyzed result, we designed and constructed a prototype are as follow : the multimedia ORDBMS server system, network interface technology, internal/external database schema design, oriental medicine expert knowledge base design, inter-data search algorithm design and thesaurus.

장기에 따른 편평상피암의 Cytokeratin 발현에 관한 연구

기근홍,김창원,김용임 조선대학교 1994 The Medical Journal of Chosun University Vol.19 No.1

Keratin is a major class of epithelial intermediate filaments and comprises a group of at least 20 different multigene derived proteins. It is expressed in different epithelia with specific combinations. The expression of cytokeratins (CK) 1.5/6, 7, 8, 10, 13, 17, 18, 19, and 20 in 35 cases of squamous cell carcinomas from uterine cervix (5 cases), lung (5 cases), esophagus (5 cases), skin (5 cases), oral cavity (5 cases), and metastatic Iymph nodes (2 cases of each organs) were examined. Some cases were examined by electron microscopy. The results obtained is as follows. 1. The CK 1 positive tumors is from keratinizing skin tumor and is show weak positivity. The CK 5/6 positlve tumor is from uterine cervix, lung and oral cavity. The CK 8 positive tumor is from uterine cervix, lung, esophagus, skin and oral cavity. The CK 13 positive tumors is from uterine cervix and lung. The CK 17 show positive staining in uterine cervix and lung. The CK 18 positive tumors is from uterine cervix, lung, esophagus, skin, and oral cavity. The CK 19 positive tumors is from uterine cervix, lung, esophagus, skin, and oral cavity. The CK 20 shows no reactivity in all cases. 2. Ultrastructurally, the tumor cells showed bundles of tonofibriIs, electron-dense tonofilaments, and desmosomes. In conclusion, CK 1,8 18 and 19 did not show orgn specificity. So it used simple epithelial markers in the majority of squamous cell carcinomas. The absence of CK 20 immunoreactivity may helpful in differential diagnosis of squamous cell tumors.

한국의 쌀産業 價格支持政策에 관한 小論

李龍耆 영남대학교 사회과학연구소 2000 社會科學硏究 Vol.20 No.1

이 논문은 쌀 수매정책과 관련하여 지금까지의 가격중시 정책이 WTO 출범 이후 보조금의 감축과 시장기능의 활성화 등 변화된 환경 하에서는 올바른 정책방향이 될 수 없음을 논증하는데 목적을 두고 있다. 이를 위하여 생산자의 총수입 변화와 수매가격 및 수매량의 변화와의 관계를 이론적으로 규명하였다. 분석 결과는 단기에 있어서 비탄력적 수요구조 하에서는 생산자의 총수입의 변화는 수매가격의 변화보다 수매량의 변화에 더 민감하게 움직인다는 것을 확인하였다. 이것은 곧 쌀에 대한 국내 보조금을 감축해야 하는 현 상황에서는 생산자 간의 소득 재분배 문제를 고려하지 않는다면 수매가격을 인하하는 한이 있더라도 수매량의 감축은 최소화하는 선택이 생산자의 소득에 미치는 악영향을 최소화하는 방안임을 의미한다.

DS-FSK 통신 시스템에 대한 연구

權起弘,金龍顯 대구산업정보대학 1998 논문집 Vol.12 No.2

Recentlly, several experiments have been reported on utilization of commerical power distribution line for data transmission purpose in realizing local FA/HA system. The power line, originally having not been in stalled for the communication purpose, exhibits very poor transmission characteristics; high attenuation rate with severe selective fading, extremely low line impedance and persistent line noises ect.,usually deny the signal transmission unless cumbersome measures are taken, which cannot normally be allowed to local FA/HA system. This paper first studies general characteristics of local power distribution line and selects frequency band relatively recommendable for signal transmission. Also, described are the neccessity of applying spread spectrum technique in order to compete severe selective fading phenomenon existing in the line. The auther then introduces a highly reliable, verstile and yet simple data transmission system designed to meet above requirements. The system operates on the principle of meet DSSS technique but transmits two different carrier frequencies, instead of one depends on the polarity of the SS output. By applying the two carrier meth od, not only the problems related with the carrier synchronization may be eleiminated, but also the process gain of SS block in the system can be multiplied, by the effect of frequency hopping process of the carriers. Acording to the analysis, the simply constructed MODEN can transmits ASCⅡ data of upto 2400 bps through local power distribution line of -7 dB SNR with the error rate of lower than 10^(-5) when the 36 kHz PN frequency is used. The auther also studies the maxmum allowable numbers of the MODEN unit s multiplexed on a power line under given error rates. The analisis shows, with the proposed units, upto 8 subscribers may be cdmmunicate with the error rate of less than 10^(-4) In order to verify the analisis, 10 test sets have been built; each composed of a spreader/corelator, carrier modulator and a PN generator triggered from fixed phase of power line voltage. A carefully designed mathing transformer has been used in order to assure perfect matching to power line impedance which drops sometimes down to less than 10 ohms. Pairs of carrier frequeneies for each unit have been selected from 100-150 kHz band. For the standard pairs built for the unit system measur ements, 113 kHz and 137 KHz have been used. A series of measurements have been conducted on dummy line as well as on actual commercial lines with the results fairely matched to the analytical values.

수종의 글라스아이오노머 수복재의 불소유리량과 2급 와동 수복시 인접치아의 법랑질에 미치는 항우식 효과에 관한 비교 연구

김용기,윤병근 大韓小兒齒科學會 1995 大韓小兒齒科學會誌 Vol.22 No.1

The purpose of this study were evaluated for fluoride release from vairous kinds of glass ionomer filling materials to deionized distilled water and fluoride uptake by enamel on adjacent tooth and anticariogenic effect after class Ⅱ restoration with glass ionomer materials. Ketac-Silver, Mifacle-Mix and Dyract were used for this study as a restorative material. Fluoride concentration released in solution from discs made of selected materials were determined daily for the first 7 days and on the 14th, 21st day. After embedding the plastic mold which filled with materials and teeth with acrylic resin measurements of fluoride uptake by enamel on adjacent tooth and observation of anticariogenic effect after class Ⅱ restoration with galss ionomer materials. The results can summarized as follow : 1. The highest amount of fluoride released in each group at first day, decreased amount as time go. Miracle-Mix released more fluoride than all other materials tested. 2. GroupⅠ and Ⅱ, Goup Ⅱ and Ⅲ, GroupⅠ and Ⅲ showed statistically significant difference amount of fluoride released(p<0.05) except 1, 2, 3 day in GroupⅠ and Ⅲ. 3. Fluoried amount of uptaked by enamel adjacent galss ionomer materials showed statestically significant difference each groups(p<0.05). GroupⅠ more fluoried uptake than Group Ⅲ, and Group Ⅱ more fluoried uptake than GroupⅠ.(p<0.05) 4. Comparison of lesion depth, all experimental group decreased lesion depth than control group(pb0.05) and GroupⅠ more decreade than Group Ⅲ, and Group Ⅱ more fdecreased than GroupⅠ.(p<0.05)

Glass Ionomer 수복재료의 불소유리와 재흡수 양상 및 상아질 표면 처리에 따른 결합력의 변화에 관한 연구

김용기,최명진 大韓小兒齒科學會 1996 大韓小兒齒科學會誌 Vol.23 No.1

In this study, the original dentin conditioners in the kit of each experimental glass ionomer restorative materials were used as control agents wherease 10% maleic acid was selected as an experimental conditioning agent. The value of maleic acid treatment in promoting the bond strength of tested glass ionomer materials was evaluated by measuring the dentin shear bond strength and observing the conditioned dentin surface through scanning electron micrograph. And also the fluoride release and uptake pattern of each glass ionomer material was analyzed quantitatively. The results were as followed. 1. The dentin surface treated with maleic acid showed cleaner surface and more clearly exposed dentinal tubules under scanning electron microscope when compared with surfaces treated with the respective control dentin conditioner. However, the shear bond strength of experimental group after treatment with maleic acid showed results of wide range possibly due to their unique and different chemical constituents and characteristics. 2. The fluoride release of the tested glass ionomer restorative materials lasted throughout the experiment, thus showing similar results with the previous stuties. A large amount of fluoride were absorbed by the restorative materials and showed continuous release. It can be thought that the advantages of continuous release of fluoride and storage capacity of glass ionomer restoratives should be used for restorations of children with relatively higher prevalence to secondary caries.

복합레진 충전시 Glass Inserts의 적용이 변연누출에 미치는 영향에 관한 연구

김용철,김용기 大韓小兒齒科學會 1997 大韓小兒齒科學會誌 Vol.24 No.2

In this study, we tired to compare the effect of glass inserts on marginal leakage of composite resin by comparing with that of several filling methods. The results obtained from this experiment were as follow; 1. The degree of microleakage measured in glass inserts group was generally lower than that of the other groups. Statistical analysis showed significant intergroup difference between glass inserts and one complete unit, pre-polymerized composite resin ball(P<.05), but no significant difference between groups of glass inserts and increments(P>.05). 2. Scanning electron microscopic observation showed relatively large gap around resin-tooth interface in specimens restored the method of using the one complete unit and pre-polymerized composite resin ball whereas a denser and tighter was observed in increments and glass inserts group. Generally the gingival margin was shown to have better bonds than the occlusal margin in specimen of all groups. 3. In the present experiment, methods using the techniques of glass inserts and increments were evaluated to be superior to those of one complete unit, pre-polymerized composite resin ball in the aspect of microleakage. However, the result of the study could not determine the superiority of the use of glass inserts over incremental method. Besides the physical properties observed in this study, the practical aspect of clinical convenience should be considered in determining the selection of material.

복합레진 수복시 사용되는 수종의 상아질 결합재의 미세누출 양상과 Streptococcus mutans에 대한 향균효과에 관한 비교연구

김용기,임철수 大韓小兒齒科學會 1995 大韓小兒齒科學會誌 Vol.22 No.1

The purpose of the present study was to evaluate the microleakage patterns and to compare antimicrobial activity on Streptococcus mutans in three dentinal bonding agent. Scotchbond multi-purpose, GLUMA bonding system and ALL-BOND were used as test materials and 60 extracted premolars were selected. For evaluation of microleakage patterns, methylene blue were penetrated and then cut, microleakage patterns were graded by stereomicroscopic observation. For comparison of antimicrobial activity, Streptococcus mutans (ATTC 27351) were grown in brain heart infusion(BHI) broth, after inoculated, the disk diffusion test were carried out. After all plate were incubated for 48 hrs 37 C, inhibitory zones were measured with a sliding calipers. Antimicrobial test were repeated three times. The results can be summarized as follows 1. The microleakage in each experimental groups showed various patterns and there were no statistical significance in three dentinal bonding agent. 2. The mean values of the inhibition zones in Scotchbond and GLUMA were revealde as same as in control. In ALL-BOND 2 the inhibition zones were less than control. 3. In every experimental groups, the inhibition zones were bigger in aerobic incubation than anaerobic incubation.

요골 두 아탈구와 동반된 상완골 내 상과 골절 : 1예 보고 A Case Report

이한용,유기원,정진영,송주현,고해석,강용구,손문익 대한골절학회 2003 대한골절학회지 Vol.16 No.2

주관절 손산 중 상완골 내 상과 골절은 단독으로 혹은 주관절 탈구와 동반되어 발생하는 것이 일반적이다. 저자들은 15세 남자 환자의 좌측 요골 두 아탈구가 동반된 상완골 내 상과 골절을 경험하였다. 도수 정복을 시도하였으나 요골 두 아탈구의 정복을 얻을 수 없어 관혈적 정복술로 치료하엿다. 6개월추시 결과 후휴증이 없는 정상적인 관절 상태를 확인할 수 있었다. 연령, 원인 , 손상 기전으로 분석해 보면 이 동반 손상은 발생하기 매우 어렵고, 문헌 탐색 결과 현재까지 동일한 증례를 찾아볼 수 없었으므로 보고하는 바이다. It has been known that fracture of medial epicondylar apophysis of distal humerus may be isolated of associated with elbow deslocations. We have experienced a case which medial epicondylar fracture of the distal humerus was associated with subluxation of the radial head. Initially, we had tried reduction of subluxated radial head by closed method, but failed. Finally open reduction gad been performed. At 6 month after open reduction, clinical and radiological result were excellent. As it is difficult for those associated injuries to occur simultaneously and the similar cases never have been reported yet, we would like to present this case with a review of the literature.