치성낭종으로부터 유래된 편평상피세포암종 : Report of a Case & Review of Literatures

권혁진,현재훈,박형국,김용각 大韓顎顔面成形再建外科學會 1997 Maxillofacial Plastic Reconstructive Surgery Vol.19 No.2

Odontogenic cysts are relatively common pathologic lesions found in the oral and perioral structures, but the case of squamous cell carcinoma arising from those cysts are very uncommon. After first reported of that case in 1889 by Herman, Schwimmer collected 56 cases of previously reported squamous cell carcinoma arising in residual odontogenic cyst during about past one century. More than 60% of cases of carcinoma developing in odontogenic cysts arising in inflammatory periapical or residual cyst, and these tumors are usually well-differentiated with relatively good prognosis, and often are diagnosed as benign lesion in radiographic or clinical examination, therefore definitive diagnosis must be made by histologic examintation. We report a case and review the literatures, in our case, 78-year old woman were clinically and radiographically diagnosed as residual odontogenic cyst. But in histologic examination after enucleation of lesion, mass of squamous cell carinoma were observed, but in other area, typical cyst wall and lining epithelium were observed. And in some area, carcinoma in situ and invading squamous cell carcinoma into the lining epithlium were also observed.

신생 흰쥐의 치아이랑과 해마형성체의 신경세포에 미치는 스테로이드의 영향에 관한연구

김경용,신권현,이원복 대한해부학회 1996 Anatomy & Cell Biology Vol.29 No.6

정밀 소형 Ball Screw의 Infeed 전조에 의한 청정 생산기술개발에 관한 연구

권용재,예인수,현동훈 한국공작기계학회 2006 한국공작기계학회 추계학술대회논문집 Vol.2006 No.-

This paper summarizes the results of the parameter conducted to analyze the effect of the rolling pressure, the rotational speed and the feedrate on material flow and thread profile for Ball Screw. Initial bank diameter affect a quality of Ball Screw in small size and the precision rolling process. Therefor, it is very important to determine the optimum bank diameter in the rolling process. And we have to development clean technology of Small Ball Screws by Infeed Rolling Machine.

현재완료형의 유표적 특성과 기능

권용현 현대영미어문학회 2001 현대영미어문학 Vol.19 No.2

This paper begins with the fact that present perfect was derived from passive construction. Today they have their own grammatical roles, but they still have the 'relative past' in common between the two. The element of 'relative past' underlies the marked structure of present perfect in both form and meaning. It is shown here that the difference of simple past and present perfect in the distributional frequency is found in different registers. Particularly, the simple present is generally favored in the conversational text. The reason for this stems from in the gap of interactiveness between spoken and written texts. Not only in registers, is the frequency difference of simple past and present perfect found in regional dialects as well. Simple past is chosen more often in the place of the present perfect in American English. This seems to have something to do with American pragmatism. The prescriptive rule against the use of present perfective with definite past time adverbials in sentence is not fully respected in many actual situations. This implies that even though it is not 'strictly' grammatical, the use of present perfect reflects the speaker's psychological attitude toward the sentence including the element of present perfect in the unconventional sentences. The use of present perfect is considered to play an important role in the information processing as well. The first use of present perfect and then simple past is to put the general past first and then the specific past, which is found in the same way as indefinite article first and then definite article are used with the related nouns. And two different propositions are suggested to be in the deep syntactic structure for the present perfect sentence. One is to indicate the first meaning, and the other the secondary meaning. The latter one is implicit and indirect. These two meanings are combined into the transformed surface structure of present perfect.

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.

複素 雙人力 記述函數를 이용한 制御系의 應答速度 補償에 관한 硏究

권세현,조용갑,박양수,최부귀 東亞大學校 附設 情報通信硏究所 1995 情報通信硏究所論文誌 Vol.3 No.1

The technique for the synthesis of the dual-input describing function(DIDF) is introduced here and the construction of a non-linear electronic compensator(N-L-E-C) based on this technique is proposed. The above non-linear network is used to compensate linear and non-linear systems for instability,speed of response, limit cycle and the static accuracy.

임상검체에서 분리된 그람 음성 세균들에 대한 Isepamicin의 시험관내 항균력

권현희,박수진,소민욱,박현구,최성호,김미나,최상호,정진용,우준희,김양수 대한감염학회 2006 감염과 화학요법 Vol.38 No.6

Background : The increasing incidence of multidrug-resistant gram-negative bacteria causing nosocomial infections is an important clinical problem. Isepamicin is a recently developed aminoglycoside which has been known to have potent activity against gram-negative organisms. We evaluated the in vitro activities of isepamicin and other aminoglycosides against a large number of gram-negative organisms. Materials and Methods : We tested the in vitro antimicrobial activities of isepamicin, amikacin, gentamicin, and tobramycin against 566 gram-negative organisms collected between January 2006 and June 2006 in Asan Medical Center. Minimal inhibitory concentrations (MICs) were determined and interpreted according to the recommendations of Clinical and Laboratory Standard Institute (CLSI). The breakpoint MIC used for interpretation of isepamicin was MIC≤16 ㎍/mL as susceptible, 32 ㎍/mL as intermediate, and 64 ㎍/mL as resistant. Results : The MIC_(50)/MIC_(90) of isepamicln for Escherichia coli, Klebsiella pneumon/ae, Pseudomonas aeruginosa, Acinetobacter baumannii, and Enterobacter cloacae were 1/2, 0.5/>128, 4/16, 16/>128, and 1/2 ㎍/mL, respectively. The susceptibilities for E. coli, K. pneumoniae, P. aeruginosa, A. baumannii, and E. cloacae were 100%, 86.4%, 89.7%, 50.0%, and 96.6%, respectively. For E. coli, K. pneumoniae, P. aeruginosa, and E. cloacae, isepamicln had better in vitro activities than gentamicin and tobromycin, and had similar activities with amlkacin. For A. baumanii, all four tested aminoglycosides had similar in vitro activities. Conclusion : Isepamicin had excellent in vitro activities against gram-negative organisms, except A. baumanii. The overall in vitro activities were similar with amikacin. 목적 : 그람 음성 세균은 다양한 지역사회 및 병원 획득 감염의 원인균이다. 최근에는 병원 감염을 일으키는 그람 음성 세균에서 항균제 내성균의 출현과 확산이 큰 문제가 되고 있다. Isepamicin은 최근에 소개된 gentamicin B의 유도체로 외국에서의 연구에 의하면 그람 음성 세균들에 대한 항균력이 우수함이 보고 된 바 있다. 본 연구에서는 우리나라의 임상 균주들을 대상으로 그람 음성세균에서 isepamicin의 시험관내 항균력을 기존의 아미노배당체 제재들과 비교하여 평가하고자 하였다. 재료 및 방법 : 2006년 1월에서 6월 사이에 서울아산병원 환자에서 분리된 Escherichia coli 113 균주, Klebsiella pneumoniae 110 균주, Pseudomonas aeruginosa 117 균주, Acinetobacter baumannii 108 균주, 그리고 Enterobacter cloacae 118 균주를 대상으로 isepaimcin, amikacin, gentamicin, tobramycin에 대한 최소억제농도(minimal inhibitory concentration, MIC)를 한천 희석법(Mueller-Hinton Agar)을 이용하여 측정하였다. 감수성여부는 CLSI 기준에 따랐으며, isepamicin은 MIC≤16㎍/mL를 감수성, MIC=32 ㎍/mL를 중등도 내성, MIC≥64 ㎍/mL를 내성으로 판정하였다. 결과 : Isepamicm의 E. coli, K. pneumoniae, P. aeruginosa, A baumannii, E. cloacae에 대한 MIC_(50)/MIC_(90)은 각각 1/2, 0.5/>128, 4/16, 16/>128, 1/2 ㎍/mL였고, 항균제 감수성률은 차례대로 100%, 86.4%, 89.7%, 50.0%, 96.6%였다. 기존 아미노배당체 제재들과 비교하면 E. coli, K. pneumoniae, P. aeruginosa, E. cloacae에서는 amikacin과 비슷한 감수성률을 보였고, gentamicin과 tobramycin보다 높은 감수성률을 보였다. A baumannii의 경우 isepamicin의 감수성률이 50.0%로 비교적 낮았지만 amikacin, gentamicin, tobramycin도 각각 50.0%, 46.3%, 47.2%의 감수성률을 나타내어 4가지 항균제가 모두 비슷한 항균력을 보였다. 결론 : Isepamicin은 그람 음성 세균들에 있어 기존의 아미노배당체 제재들과 비교했을 때 amikacin과는 동등한 시험관내 항균력을 보이고 gentamicin, tobramycin보다 뛰어난 시험관내 항균력을 보여 사용이 유망한 아미노배당체 중 하나라 생각된다.

근긴장성 이영양증 환자 1례에 대한 보고

권용욱,조종훈,정필현,강석 東國大學校醫學硏究所 1997 東國醫學 Vol.4 No.-

근긴장성 이영양증은 1909년 Steinert에 의해 처음으로 보고된 질환으로 상염색체 우성유전으로 발현되며 근긴장증 이외에 전신증상이 함께 나타나는데, 전두두 대머리, 긴 얼굴, 안검하수, 역전된 미소모양의 입술등이 보이고 식도, 대장, 자궁 등의 평활근도 침범하여 연하곤란, 구음장애, 변비, 분만장애 등을 일으킬 수 있다. 또한 심장비대와 심장전도의 이상을 동반하는 경우 이로 인한 부정맥이 주요 사망원인이 될 수 있다. 이러한 특징적인 임상증상 외에 근전도 검사상 일명 dive bomber sound 또는 motorcycle sound를 보이는 운동단위전위가 특징적으로 관찰된다. 본 교실에서는 좌측 근위약을 호소하고 원위부보다 근위부 근력이 더 심하게 약화되어 있는 근긴장성 이 영양증 환자 1례를 경험하였기에 문헌고찰과 함께 보고하는 바이다. Myotonic dystrophy, first described by Steinert in 1909, is an autosomal dominant multisystem diease. Most patients note the insidious onset of weakness in the limb muscles or difficulty relaxing muscles after a strong contraction. The evidence of Multisystem involvement includes early frontal balding, less than average intelligence, posterior subcapsular cataracts, abnormal cardiac conduction and testicular tubular cell atrophy. In addition, there is wasting of the facial musculature, including the temporalis, masseter, and stemocleidomastoid muscles, which produces a characteristic long face with ptosis, hollow temples, and a hanging jaw. Electromyography is extremely helpful in making the diagnosis. The presence of myotonic discharges in affected muscles is characteristic finding in electromygraphy. Both the amplitude of the potentials and the frequency of the discharges wax and wane. The sound of the discharges is quite characteristic and in their recognition which is similar to a dive bomber sound or motorcycle sound. We recently experienced a case of myotonic dystrophy who complained unusual symptoms such as the left side weakness, proximal muscle weakness rather than distal muscle weakness. So we report this case with review of the literatures.

지속성 외래복막투석 환자들의 예후에 영향을 미치는 요인들에 관한 고찰

권혁만,김찬덕,조지형,장민화,최혁준,이현철,박자용,박선희,김용림 대한신장학회 2004 대한신장학회잡지 Vol.23 No.2

초등학교 학생의 체육 특기·적성활동 만족도에 관한 조사 연구

현승권,이용훈 한국스포츠리서치 2004 한국 스포츠 리서치 Vol.15 No.5

This study was to prove how activity of special ability and aptitude of physical education in elementary schools influences on contentment, The target group for this research was the on including 840 elementary school boys and girls in Seoul area. And the actual analysis data were based on 805 boy and girls valid papers for questions(questionnaire)except incorrectly answering papers. In this research, the method through the papers for the question(questionnaire)was used as a measuring instrument, consisting of the area of the participation, the Degree of the participation, and satisfaction. The papers of the questions (questionnaire)filled in only correctly were used as the basic data, but excepting them filled in incorrect-double and no answering, The valid sample data were processed with a coding system throughout the guidance of the coding, The coded data were computerized separately, and processed in accordance with the purpose of analysis, using the program for analysis, SPSS Windows 10.0 Version in the computer system. The analysis methods used for analysing various data in this research were T-test and standard multiple regression analysis. The followings were the results acquired through the mentioned above methods, process, and data analysis. The first, there were difference in the satisfaction according to the features of the social population statistics in school years. The second, there were differences in the satisfaction according to the area of the participation. The third, the degree of participation had an effect on contentment.