서울의 Penicillinase Producing Neisseria gonorrhoeae 발생빈도(1997)

김재홍,문득곤,김정수,김용준,임동진,박상훈,김희성,이민수,송기훈,김갑형,김형석,성소영,이인섭,김석우,황지환,조창근,김경문,부태성 대한화학요법학회 2000 대한화학요법학회지 Vol.18 No.3

Background : In recent years, gonorrhea has been pandemic and remains one of the most common STDs in the world, especially in developing countries. Objective & Methods : For the detection of a more effective therapeutic regimen and assessing the prevalence of PPNG, we have been trying to study the patients who have visited the Venereal Disease Clinic of Choong-Ku Public Health Center in Seoul since 1980 by means of the chromogenic cephalosporin method. Results : In 1997. 99 strains of N. gonorrhoeae were isolated, among which 45(45.5%) were PPNG. Conclusion : The prevalence of PPNG in Seoul, which had been decreased to 39% in 1996 after a peak of 74.3% in 1993, is increased to 45.5% in 1997.

적응 신경망 수신기를 이용한 DS/CDMA 다중사용자간섭(MAI) 제거

김재수,김창선,김성곤,변건식 동아대학교 2001 大學院論文集 Vol.26 No.-

The capacity of direct-sequence code-division multiple-access (DS/CDMA) systems is co-channel severely limited by multiple access interference (MAI) produced by the other users. To improve the capacity, joint-detection receivers and MAI cancellation techniques have been proposed.[1][2][3] This paper presents an adaptive neural network-based receiver that has the capacity of combating the 'near-far' problem and rejecting the multi-user interference in a multipath channel.[4] A comparative performance analysis of the conventional receiver and the adaptive neural network receiver is camel out using a Monte Carlo simulation. It is found that the new receiver performs extremely well in multipath and multiple access channels with a significant 'near-far' effect.

향기요법이 통증을 주소증으로 입원한 환자의 수면장애에 미치는 영향

박수곤 ( Soo Gon Park ),양미성 ( Mi Sung Yang ),김오영 ( Oh Young Kim ),조희근 ( Hee Guen Jo ),최진봉 ( Jin Bong Choi ),김선종 ( Sun Jong Kim ),설재욱 ( Jae Uk Sul ) 한방재활의학과학회 2010 한방재활의학과학회지 Vol.20 No.4

Objectives :The purpose of this study is to investigate the effects of aroma therapy on sleep disorder patients with musculoskeletal pain. Methods :The 44 patients were divided into 2 groups: Experimental group(Exp. group) was treated with aroma therapy and control group was treated except aroma therapy. To evaluate the efficiency of aroma therapy, the Korean sleep scale A(Jin-Joo Oh, Mi-Soon Song, Sin-Mi Kim. 1998) and visual analogue scale(VAS) were applied before treatment and after 5 days treatment. Results :1. The Experimental group has improved statistical significance in sleep disorder score as compare to the control group. 2. The improvement of sleep disorder score of Exp.group has difference according to impression. 3. The improvement of sleep disorder has an effect on pain decrease. Conclusions :Aroma therapy has effects of improvement on sleep disorder with musculoskeletal pain.

한반도 중서부 지각구조와 물성연구 : 부여록옥광산에서 산출되는 귀사문석의 광물학적 특성 Mineralogy of precious serpentine from the Booyo Green Jade Mine

김원사,정지곤,이병임,이재열 충남대학교 기초과학연구소 1995 연구논문집 Vol.15 No.-

충남 부여군 외산면에 위치한 부여록옥광산은 원래 석면을 대상으로 가행되었던 광산이었다가 폐광된 후 최근 세계적으로도 매우 희귀한 보석으로 인정받고 있는 귀사문석이 산출되고 있음이 발견되어 현재 채광작업을 재개하고 있다. 부여산 귀사문석은 광산의 주변암체인 선캠브리아기의 편암을 관입압 사문암체를 후기에 이를 다시 관입한 그로슐라 석류석맥의 접촉부를 따라 발달하고 있다. 이번 연구에서는 부여산 귀사문석에 대한 광물학적, 보석학적 특성을 규명하기 위하여 편광현미경, 비중계, 굴절계, 경도계, X선회절분석기, 화학분석, 적외선분광분석법 등을 이용해 연구하였다. 부여산 귀사문석은 짙은 녹색을 띠고 아투명하며 높은 지방광택을 나타난다. 모스경도는 H=5∼6이며 인성은 매우 높은 편이다. 비중은 2.67, 스포트법으로 측정한 굴절율은 No=1.56이다. X선회절분말양상은 7.40(100), 4.64(25), 3,68(68), 2.757(69), 2.530(49), 2.459(32), 2.113(32), 1.710(21)으로 안티고라이트임을 알 수 있었으며, 모암인 사문암도 안티고라이트로 구성되어 있다. 그러나 귀사문석과 사문암의 투명도와 경도 등이 다른것은 구성광물결정의 조직차이가 큰 요인인 것으로 여겨진다. 귀사문석의 주요 화학성분은 42.49% SiO_2, 39.08% MgO, 3.85% Fe_2O_3, and 11.87% H_2O 등이며, 미량원소로는 Cr(2188 ppm), Ni(1110ppm), Co(58 ppm), and Ta(108 ppm) 등이 있다. 적외선분광분석결과는 3600, 1190, 1070, 980, and 610 cm^-1에 흡수 peak를 나타내었다. 부여산 귀사문석(안티고라이트)은 감람석과 휘석으로 구성된 초염기성암이 변질되어 형성된 것으로 해석되며 그 생성반응은 (Fe, Mg)_2SiO_4 (감람석)+(Mg, Fe)SiO_3 (휘석)+2H_O→M_3sI_2O_5(OH_4)(티고라이트)+Fe_3O_4 (자철석). The Booyo Green Jade mine, located in Oesan-myon, Booyo-gun, Chungnam-do, had originally been developed for asbestos. Recently it has re-opened after discovery of precious serpentine. The precious serpentine is a gem variety of serpentine and is regarded as a rare and valuable gem material in the world. The precious serpentine develops along the contact between grossular garnet vein within the host rock serpentinite that had intruded schist of Precambrian age in the area. In this study mineralogical and gemmologicl properties of the precious serpentine from Booyo have been investigated by using polarizing microscope, specific gravity balance, refractometer, hardness tester, X-ray diffractometer, XRF and ICP-MS analyers, and infrared absorption spectroscope. The Booyo precious serpentine is deep green in color an semi-transparent, and also yields a highly oily luster. Mohs's hardness is measured to be H=5-4 with excellent toughness. Specific gravity is determined to be 2.67, and refractive index N_D=1.56 by a distant-vision method. Xray diffraction data shows peaks of 7.40(100), 4.64(25), 3,68(68), 2.757(69), 2.530(49), 2.459(32), 2.113(32), 1.710(21), which corresponds well to that of antigorite. The higher transparency and hardness of the precious serpentine than the neighboring serpentinite are most probably due to textural arrangement of constituent antigorite crystals. The major chemical constituents of precious serpentine are 42.49% SiO_2, 39.08% MgO, 3.85% Fe_2O_3, and 11.87% H_2O with trace elements Cr(2188 ppm), Ni(1110ppm), Co(58 ppm), and Ta(108 ppm). Infrared absorption spectroscopic analysis shows peaks at 3600, 1190, 1070, 980, and 610 cm^-1, Formation of the precious serpentine(antigorite) from ultramafic rock, which was made up of olivine and pyroxene, may represented by the following reaction: (Fe, Mg)_2SiO_4 (olivine)+(Mg, Fe)SiO_3 (pyroxene)+2H_O→M_3sI_2O_5(OH_4)(antigorite)+Fe_3O_4 (magnetite).

음경골절 치험 3례

김철성,문재선,김춘곤 朝鮮大學校 附設 醫學硏究所 1986 The Medical Journal of Chosun University Vol.11 No.1

Generally, penile fracture is rare. Fracture of the penis is a lesion occurring after blunt trauma to the erect penis and the characteristic pathology consists of a rupture of the tunica albuginea with hemorrhase followed by a large hematoma formation and distortion of the penis. Many authors advocatea immediate operative intervention for fracture of the penis. Herein we report three cases of penile fracture with review of literatures.

터보부호를 채용한 QPSK/OFDM 시스템의 성능 분석

김성원,심재옥,김언곤 한밭대학교 생산기반기술연구소 2002 생산기반기술연구소 논문집 Vol.2 No.1

In this paper, we have simulated the performance of QPSK/OFDM system with 1/3 turbo coding under AWGN(Additive White Gaussian Noise), indoor channel or doppler shift. The system adapted (3,1,4) turbo encoder as channel coding method, OFDM with subcarrier 64 as modulation technique, and QPSK as mapping method. In the doppler shift, we changed to value of doppler frequency 46 ㎐(mobile velocity 10 ㎞/h) and 92 ㎐(mobile velocity 20 ㎞/h). Then we looked at coding effect of channel coding and decoding method. As a result of simulation, in case that the iterative decoding of QPSK/OFDM system adopt turbo encoder in the indoor channel was done about three times, efficiency was demanded about 2.7㏈ when BER is 10^-3 and about 5 ㏈ when BER is 10.3 ㏈. When the doopler frequency is 46 ㎐, efficiency was demanded about 7.9 ㏈ in case that BER is 10^-3 and about 10 ㏈ in case that BER is 10^-5. And when the doppler frequency is 92 ㎐, efficiency was demanded about 17 ㏈ in case that BER is 10^-3 and about 23.7 ㏈ in case that BER is 10^-5. As the doppler frequency is high, in spite of having the high E_b/N_o in the coding gain graph, the error flow whose efficiency wasn't advanced came out.

整流方式에 따른 醫療用 X-線 裝置의 特性

김재문,권덕문,최세곤 嶺南大學校 工業技術硏究所 1995 工業技術硏究所論文集 Vol.23 No.2

The output characteristics on various rectification methods of X-ray equipments for the purpose of medical use are investigated by means of X-ray multimeter. in comparison the measured values with setting values, the accuracy of X-ray tube voltage and illumination time was varied in the range of +70% in case of three phase type including inverter type. The inverter type also showed a good reproducibility. As the experimental results, it is desirable that the inverter type X-ray equipment will be widely used in the near future.

여러가지 수복물의 polishing조건에 따른 치수 온도변화

김재곤,이승영,박종하,백병주,양종숙 大韓小兒齒科學會 1999 大韓小兒齒科學會誌 Vol.26 No.2

수복물의 연마의 중요성에 대하여 많은 연구들이 이루어져 왔으며, 이는 수복물의 금속성질의 개선, 변연적합성의 증가 그리고 치태축적의 감소 등을 이유로 시행된다. 그러나 불행하게도 수복물에 대한 연마시 열의 발생으로 인하여 치수부위에 손상을 초래하므로 열의 발생을 최소화하려는 노력이 뒤따라야 할 것이다. 이에 본 연구에서는 수복물의 연마시 회전속도의 차이, 냉각제의 적용 유무, 여러 종류의 수복물의 차이, 간헐적인 연마와 연속적인 연마의 차이 그리고 잔존 상아질의 두께의 정도에 따른 치수내부에서의 열의 변화를 알아보기 위하여 발거된 구치에 5급 와동을 형성한 후 복합레진(Z100, 3M co), resin-mod-ified GLC(Dyract, Fuji II LC), 그리고 아말감(Degussa)등으로 충전하였으며, 다양한 조건에서의 연마를 시행, 치수내부에서의 열의 변화를 측정하여 다음과 같은 결과를 얻었다. 1. Amalgam을 건조한 상태에서 연마시 다른 재료에 비해 큰 치수내 온도 상승을 보였다.(P<0.05). 그러나 Z100, Dyract, Fuji II LC간에는 간헐적 수복물 연마와 연속적인 수복물 연마 모두 어떤 경우든 유의차가 없었다.(P>0.05). 2. 같은 조건으로 연마를 시행했을 때, 간헐적인 연마보다 연속적인 연마를 한 경우가 치수내 온도가 더 크게 상승하였다.(p<0.01). 3. 아말감과 Dyract에 있어서는 잔존 상아질의 차이에 따른 치수내 온도변화에 유의한 차이를 보였으나(P<0.01), Fuji II LC에 있어서는 유의성이 없었다(P>0.01). 4. 냉각제의 유무에는 관계없이 어떤 경우든 시간에 따른 온도 상승을 보였다. 그러나, 냉각제를 사용한 경우가 냉각제를 사용하지 않은 경우에 비해 온도 상승값이 훨씬 작았다.(P<0.01) The importance of finishing and polishing the restoration has been described by several authors. The final step provides for improved metallurgical properties, better marginal adaptation, reduced plaque accumulation. Unfortunately, finishing of the restorations can produce damage from temperature rises at the pulpal wall. The aim of this study was to determine the changes in temperature can be occurred during the use of finishing and polishing instruments under a variety of conditions. ; with or without a water coolant, intermittent or continuous operation, high or low rotation speed, remaining dentin thickness, and various restorative materials. Class V preparations were cut on extracted molars and restored with composite resin(Z 100), resin-modified glass ionomer cements(Dyract, Fuji II LC), and amalgam. Finishing was done with aluminum oxide coated disc(Sof-lex polishing disc, 3M, USA). The following results were obtained. 1. The rise of temperature during polishing of amalgam restorations was the highest among the all experimental groups except polishing with water coolant(P<0.05). However, there were no statictical differences in temperature rises between Z 100, Dyract and Fuji II LC(P>0.05). 2. The intrapulpal temperature was greatly influenced by the applied time, and intermittent polishing was showed significantly lower temperature rises than continuous polishing(p<0.01). 3. The intrapulpal temperature was increased according to the application of polishing regardless of using water coolant. However, polishing with water coolant showed significantly lower temperature in the pulp than not used water coolant(P<0.01).

SECKEL 증후군 환자의 증례보고

김추성,김재곤,백병주,양연미,정진우 大韓小兒齒科學會 2010 大韓小兒齒科學會誌 Vol.37 No.1

Seckel 증후군은 상염색체 열성 유전질환으로 태내에서의 성장지연에 따른 출생 후의 소인증, 심한 소두증을 나타내며, 큰눈과 돌출된 코, 후퇴된 하악을 동반한 새 모양의 안모가 특징적이다. 다른 임상증상으로는 관절의 결함, 내반족, 드문드문 난 모발, 비뇨생식기의 이형성, 정신지체, 혈액학적 이상 등이 나타날 수 있다. Seckel 증후군의 구강 내 소견으로는 부정교합, 법랑질 저형성증, 일부 치아의 선천적 결손, 우상치 등이 나타날 수 있다. 본 증례는 Seckel 증후군을 보이는 두 증례에서 발육부전, 새 모양의 안모, 비뇨기과적 기형, 치아의 저형성과 부정교합 등 다양한 전신증상과 구강 내 증상들을 보였기에 이를 보고하는 바이다. Seckel syndrome is an autosomal recessive disorder characterized by intrauterine growth retardation and post-natally by dwarfism, severe microcephaly, bird-headed profile with receding chin, prominent nose, joint defects, clubfoot, sparse hair, malformation of genitourinary tract and rectum, mental retardation and hematological disorders. There is also a reduction in the number of blood cells. Dental anomalies of Seckel syndrome are crowded teeth with malocclusion, enamel hypoplasia, absence of some teeth and taurodontism. This report described the oral and maxillofacial manifestations of children associated with Seckel syndrome. Children with Seckel syndrome have several dental and skeletal irregularities. The purpose of this study was to report the dental and medical characteristics of the patient and review the literatures of Seckel syndrome.

타액 우식 관련 검사와 치아 우식 경험과의 관계에 관한 연구

김재곤,김영신,백병주,양연미 大韓小兒齒科學會 2005 大韓小兒齒科學會誌 Vol.32 No.1

본 연구의 목적은 타액 분비량, 타액의 완충능력 그리고 타액 내 뮤탄스 연쇄상구균 수를 측정하여 치아 우식경험도와의 상관관계를 분석하기 위하여 시행하였다. 81명의 평균연령 26.1세인 81명의 전북대학교 치과대학생을 대상으로 구강내 우식경험지수를 조사한 후 타액 분비량을 측정하였고, 시판 중인 Dentobuffer Strip 키트와 Dentocult SM-Strip mutans 키트(Orion Diagnostica, Finland)를 사용하여 타액의 완충능력과 뮤탄스 연쇄상구균 수를 평가한 결과, 다음의 결론을 얻었다. 1. 조사 대상자의 평균 DMFT와 DMFS는 6.57과 12.65를 나타냈다. 2. 일반적으로 우식경험지수가 높을수록 타액 분비량이 낮아지는 경향을 보였으나, 이 중 자극성타액 분비량과 DMFT 사이에서만 통계적으로 유의한 차이를 나타냈다(P<0.05). 3. 타액의 완충능력과 우식경험도 사이의 관계에서 타액의 PH가 낮아짐에 따라 DMFT와 DMFS는 증가하였으며, 특히 DMFT의 경우 통계적으로 유의한 결과를 보였다(P<0.05). 4. 타액 내 뮤탄스 연쇄상구균의 수가 높을수록 DMFT와 DMFS가 높게 나타났으며, 통계적으로 유의한 차이를 나타냈다(P<0.05). 5. 자극성 타액 분비량이 낮을수록, 타액의 완충능력이 낮을수록, 그리고 타액 내 뮤탄스 연쇄상구균 수가 많을수록 더 높은 우식경험도를 나타냈다. The aim of this study was to analyze the relationship between salivary flow, salivary buffer capacity, level of mutans streptococci and dental caries experience in Korean dental college students. A total of 81 students of the school of dentistry, Chonbuk national university, mean age of 26.1 years, were subjected to oral examination to establish the DMFT and DMFS according to WHO guidelines. Saliva samples from the students were collected for quantitating stimulated and unstimulated salivary flow rate. Buffering capacity was estimated using a commercial colorimetric strip test, and number of mutans streptococci was determined from stimulated saliva using a strip mutans test. The means of DMFT and DMFS were 6.57 and 12.65, respectively. The stimulated salivary flow rate was correlated with DMFT(o´= -0.219) and high levels of salivary mutans streptococci were significantly correlated with higher DMFT and DMFS scores(p<0.05). Level of mutans streptococci was significantly correlated with dental caries experience, in both DMFT and DMFS score, and buffering capacity was inversely correlated to DMFT score. However, unstimulated salivary flow rate was not correlated with caries experience.