PLA에 의한 유한체 GF(2) 상의 비트 코드 연산 승산기의 구성

성현경 尙志大學校 生産技術硏究所 1999 生産技術論叢 Vol.7 No.-

In this paper, we are proposed the multiplication algorithm that multiply each bit to be encoded the bit code over the finite fields ??. This algorithm is shown the features as follows; 1) if the index ⅰ of Pⅰis larger than 0 and less than m-1, the coefficients Pⅰof the multiplication result polynomial is obtained the result to be added all values of (??)mod2 which ⅰ equals the value of j plus k, and 2) if the index ⅰ of Pⅰis larger than m and less than 2m-1, the coefficients Pⅰ of the multiplication result polynomial is obtained the result to be added all values of (??)mod2 which ⅰ equals the value of j plus k. This multiplier is constructed for 2≤m≤5 and is implemented in PLA. It is applied to the extension of degree m over ??.

추기복수형 열병합발전 사이클의 부하변동에 따른 엑서지 해석

성현찬,김경훈 國立金烏工科大學校附設生産技術硏究所 1997 産業技術開發硏究 Vol.13 No.-

This paper reports a suitable operating mode and condition through the economic and exergy analysis to a cogeneration power plant cycle with computer simulation. The exergy analysis that permits to predict the exergy losses in each component furnishes information to the quantity and the place of exergy loss. The simulation condition is to generate constant electricity in spite of the load change of process steam when the supply of process steam and pressure of condenser is changed, devided with sixteen kinds of operating modes according to the ratio of process steam by the auxiliary boiler to steam extracted from the high pressure turbine. Performing the computer simulation for the economic and exergy analysis with above condition, the results show that a cogeneration efficiency is increased as process steam supply is increased and the ratio of process steam by auxiliary boiler is decreased. Oherwise, a economics rate and a cogeneration efficiency are decreased as the pressure of the condenser is increased. And the boiler and the condenser have about 96 to 98 percent of the total exergy losses in a cogeneration power plant cycle.

고정식 교정환자에서 치주건강 유지에 대한 전동치솔의 효과

박성준,황현식,이기헌,경승현 전남대학교 치의학연구소 2003 구강과학 Vol.15 No.2

Patients with fixed orthodontic appliances frequently show ineffective plaque control caused by these orthodontic appliances. Although many methods may be helpful in reducing dental plaque formation, optimal mechanical plaque removal and oral hygiene instruction are the most important factors during orthodontic treatment. The purpose of this study was to evaluate the efficacy of an electric toothbrush, with a specially designed orthodontic brush head, compared to a manual toothbrush on periodontal health in patients with fixed orthodontic appliances. Forty patients were randomly divided into two groups, the electric and the manual toothbrush groups, 1 month after attachment of fixed orthodontic appliances. Periodontal status was measured using a plaque index, a gingival index, a bleeding index, a pocket depth and a relative attachment loss, at baseline and after 3 months, 6 months, 9 months, and 12 months. Oral hygiene instruction was given according to the type of toothbrush used. The Braun Oral-B Plak Control with Ortho OD 15-1 brush was used as the electric toothbrush while the Butler G. U. M 124 was given as the manual toothbrush. By comparing between the electric and the manual toothbrush groups, the following results were obtained: 1. In the manual toothbrush group, the gingival and bleeding indices showed no statistically significant differences. but the plaque index was significantly decreased (p<0.001) and pocket depth as well as relative attachment loss were significantly increased (p<0.01). 2. In the electric toothbrush group, the bleeding index, pocket depth and relative attachment loss showed no statistically significant differences, but the plaque and gingival indices were significantly decreased (p<0.001). 3. In the case of the plaque, gingival and bleeding indices, there were no statistically significant differences between the electric and the manual toothbrush groups. On the contrary, in the case of pocket depth and relative attachment loss, there were statistically significant differences between the electric and the manual toothbrush groups: an increase in the manual toothbrush groups unlike the electric toothbrush groups keeping the same state (p<0.05). These findings suggest that an electric toothbrush is useful to orthodontic patients with fixed appliances.

원발성 폐암 환자의 생존율에 관한 보고

김현태,이상무,어수택,박춘식,정성환,허승재,남충희,강창희,김용훈 순천향대학교 1994 논문집 Vol.17 No.4

We analysed 404 patients with primary lung carcinoma who were treated at Soonchunhyang University Hospital from July, 1985 to september, 1993 in order to investigate the survival rate and epidemiolgical properties of primary lung cancer. They were 330 males and 74 females. The most prevalent decade was seventh. In terms of cell type, the squamous cell was 225 patients (55%), and adenocarcinoma, small cell, mixed type was 21%, 19%, 4%, respectively. Among non-small cell lung carcinoma, stage Ⅲa was the most prevalent one(92%). In case of small cell carcinoma, the limited stage was 64%. The 12-, 24-, 36- month survival rate of total patients was 57%, 31%, 22%, respectivley and median sruvival time was 15 months. The 36-month survival rate tended to be longer in non-small cell lung carcinoma than that of small cell lung cancer, but there was no difference between two groups, statistically. In non-small cell carcinoma, The 36-month survival rate and meidan survival time were longer in the stage Ⅰ and Ⅱ than those of Ⅲa, Ⅲb, Ⅳ (80% versus 38%, 22%, 0%, p<0.05). According to involvement of lymph node, the 36-month survival rate was longer in NO and N1 than those of N2, N3 (61.9%, 48.7% versus 17.7%, 17.3%, p<0.05). In small cell carcinoma, The 36-month survival rate and median survival rate were higher and longer in limited stage than those of extensive stage(16.1% and 13 month vs 10% and 8 month, p<0.05). In conclusion, we report here the incidence of primary lung carcinoma and the survival rate of paients with primary lung carcinoma who were treated in Soonchunhyang University Hospital.

열처리가 Teflon^(??) FEP film의 전하보존특성에미치는 영향

김성준,이현석,김지균,권정열,이헌용 명지대학교 산업기술연구소 2007 産業技術硏究所論文集 Vol.26 No.-

In this paper, we studied the method of electrets electrode which formed to accumulate negative electric charges by corona discharges. The breakdown voltage samples and damaged samples by various corona discharges have made material stabilization and improved characteristics of electric charge storage throughout the annealing processes. After the experiment made material stabilization nearly melting point by many kinds of annealing conditions, we did the corona discharge again by the charged high voltages, a discharge electrode gap, and a discharged time. As we compared it with the best condition, we confirmed that characteristics of electric charge storages were improved.

인터넷 캐쉬를 위한 멀티미디어 데이터의 재배치 정책

홍현옥,임은지,박성호 동의공업대학 2000 論文集 Vol.26 No.1

Through the dramatic growth of Internet, it becomes easy for people to access geographically distributed vast amounts of information. But, currently Internet is suffering from problems such as server overload, network congestion and client response time. In addition, currently the number of continuous media data such as audio and video is growing rapidly. In this paper, we propose SCU(Smallest Caching Utility) proxy caching scheme that stores a portion of continuous media stream or entire stream on the Internet. The proposed scheme reduces client latency and maximizes the amount of data served directly from cache without accessing the central server. By caching the initial fraction of stream data, service startup latency can be reduced. And, by varying the size of the fraction of stream to be cached according to variation of stream popularity, we can utilize the cache space efficiently and maximize the amounts of data served directly from cache. We use the caching utility formula of each stream for the measurement of cache replacement. The way to measure popularity of continuous media stream should be different from that of traditional data such as text and image. We propose the method of measuring popularity of stream using the amounts of data played by clients. We have performed simulations to evaluate our caching policy, Simulation results show that our caching policy outperforms other caching algorithms such as LRU, LFU and SIZE in aspects of BHR(byte hit ratio), initial latency and replacement overhead.

표피 성장인자의 국소적용이 인체 표피화에 미치는 효과에 대한 연구

김현옥,유성종,정승문,김성수 大韓成形外科學會 1993 Archives of Plastic Surgery Vol.20 No.3

An understanding of the mechanism of healing has increased dramatically during the past decade. The phenomenon of epithelization is important in the normal resurfacing of a donor site or a partial thickness burn wound. This study was conducted to clarify the effect of epidermal growth factor in wound healing of human. Paired donor sites were created in 18 patients who required skin grafting for either burns or reconstructive surgery. One donor site from each patient was treated topically with silver sulfadiazine cream, and the other was treated with silver sulfadiazine cream containing epidermal growth factor(10ug/ml) (Human recombinant epidermal growth factor ; Sigma, St.Louis, Mo). The donor sites were photographed daily, and healing was measured with the use of planimetric anlysis. The donor sites treated with silver sulfadiazine containing epidermal growth factor had an accelerated rate in all 18 patients as compared with that in the paired donor sited treated with silver sulfadiazine alone. Combining data from all patients demonstrated reduced the average time to 100% healing by approximately 2 to 3 days (p<0.01). Light and electron microscopical study of biopsy specimens taken from the centers of donor sites three days after the onset of healing supported these results. In conclusion, epidermal growth factor accelerates the rate of healing of partial thickness skin wound.

라틴아메리카 문화연구의 쟁점과 동향

김현균,이성훈 서울大學校 스페인中南美硏究所 2007 이베로아메리카硏究 Vol.18 No.-

Este trabajo tiene por objeto revisar algunas conceptualizaciones pole´micas y diversos debates trascendentales que han atravesado los llamados estudios culturales latinoamericanos. Durante las últimas de´cadas ha habido una acalorada discusio´n en torno a este campo de estudio en casi todas sus instancias: desde sus caracteri´sticas y objetivos hasta sus ori´genes y perspectivas futuras. A lo largo de este proceso los estudios culturales latinoamericanos se han ido convirtiendo en un verdadero paradigma alternativo, cada vez más adecuado a la diversidad y complejidad de la nueva realidad latinoamericana. Como resultado de nuestra revisio´n se pondri´a en evidencia que este campo de estudio no representa únicamente una ruptura epistemolo´gica, en lo que se refiere a una visio´n transnacional y transdisciplinaria de los estudios de Ame´rica Latina, sino una continuidad de la propia tradicio´n cri´tica latinoamericana.

인슐린의존형 당뇨병환자에서 임신중 병발한 당뇨병성 케톤산증 1예

이성근,신영구,이성규,정윤석,이관우,김현만,김행수 아주대학교 1997 아주의학 Vol.2 No.2

저자등은 인슐린의존형 당뇨병환자에서 임신중에 병발한 당뇨병성 케톤산증을 1예를 경험하였기에 문헌고찰과 함께 보고하는 바이다. IDDM is an autoimmune disease resulted from beta cell destruction and insulin deficiency, and developed mostly in children and puberty. Ketoaddosis remains one of the most senous complications that can occur in the pregnant diabetic. A 26-year-old woman, gravida 1, para 0, was admitted at 32 weeks gestation because of fever lasted for 6 days. She had been treated with insulin pump during the pregnancy. Blood sugar was well controlled before admission, and the etiology of her ketoacidosis was urinary tract infection and no insulin-intake. DKA was treated with fluids and intravenous insulin. Urinary tract infection was treated with antibiotics, based on culture test. Healthy newbom was later delivered by cesarean section due to fetal distress. We experienced a case of DKA in pregnant woman and report it with a review on literature.

흉수부에 발생한 희돌기 교세포종(Oligodendroglioma) 1예 : 증례보고 Case Report

고현송,송시헌,김관태,김성호,김윤 대한신경외과학회 1995 Journal of Korean neurosurgical society Vol.24 No.5

Primary oligodendroglioma of the spinal cord is a very rare tumor. On searching through the literature from 1931. we could find only about 46 cases, and tumor is almost absent in Korea on the review of the literature. The authors present a case of 8-year-old female patient with the symptoms of paraparesis, urination difficulty. diffuse back pain and hypesthesia in both lower extremities. Spine MRI revealed the mass at the level of T(3)-T-(12), with combined nature of cystic and solid portion. Decompressive laminectomy and partial mass removal was performed, and then adjunctive radiotherapy and chemotherapy was done. The patient was improved after operation with radiotherapy and chemotherapy. so he walks alone and has no voiding difficulty at present (postoperative about 20months),