순환결합형 뉴렬네트워크의 동적 성질 분석과 집적화

박철영,양진모 대구대학교 과학기술연구소 1997 科學技術硏究 Vol.4 No.3

In this paper, some dynamic behaviors of a simple neural networks with the cyclic connection have been investigated. To this end, the properties of state transition diagram of the network have been evaluated. Modulation in the period of limit cycle as a function of self-connection weight or of the gain of sigmoid function has also been presented. In addition, the stability of the network for mean zero normal distribution Gaussian noise has been discussed. Finally, in order to investigate dynamic behaviors of networks on neuro-chips, hardware neural networks with programmable synaptic weights have been fabricated according to the 1.2㎛ CMOS design rule of MOSIS foundary service and the test results have been discussed,

수종의 엔진구동형 Nickel-Titanium file을 이용한 근관형성 방법이 근관만곡도 유지능력에 미치는 영향

이철환,조경모,홍찬의 大韓齒科保存學會 2003 Restorative Dentistry & Endodontics Vol.28 No.1

There are increasing usage of Nickel-Titanium rotary files in modern clinical endodontic treatment because it is effective and fater than hand filing due to reduced step. This study was conducted to evaluate the effect of canal preparations using 3 different rotary Nickel-Titanium files that has different cross sectional shape and taper on the maintenance of canal curvature. Simulated resin block were instrumented with Profile(Dentsply, USA), GT rotary files(Dentsply, USA), Hero 642(Micro-Mega, France), and Pro-Taper(Dentsply, USA). The image of Pre-instrumentation and Post-instrumentation were acquired using digital camera and overspreaded in the computer. Then the total differences of canal diameter, deviation at the outer portion of curvature, deviation at the inner portion of curvature, movement of center of the canal and the centering ratio at the pre-determined level from the apex were measured. Results were statistically analyzed by means of ANOVA, followed by Scheffe test at a significance level of 0.05. The results were as follows; 1. Deviation at the outer portion of curvature, deviation at the inner portion of curvature were showed largest in Pro-Taper, so also did in the total differences of canal diameter(p<0.05). 2. All the groups showed movements of center. Profile combined with GT rotary files and Hero 642 has no difference but Pro-Taper showed the most deviation(p<0.05). 3. At the 1, 2, 3mm level from the apex movements of center directed toward the outer portion of curvature, but in 4, 5 mm level directed toward the inner portion of curvature(p<0.05). As a results of this study, it could be concluded that combined use of other Nickel-Titanium rotary files is strongly recommended when use Pro-Taper file because it could be remove too much canal structure and also made more deviation of canal curvature than others.

무증상의 후두개곡 낭종 환자에서 예기치 못한 어려운 기관내 삽관 1례

이상모,최준석,이철승,김원태,박천희 朝鮮大學校 附設 醫學硏究所 2007 The Medical Journal of Chosun University Vol.32 No.1

Although vallecular cyst is often asymptomatic and harmless to the patient, discovery of large vallecular cyst after induction of anesthesia is a potentially life-threatening problem for thepatient and provides for the anesthesiologist a challenge in airway management. We describe a case of difficult intubation where the laryngeal inlet was obscured by a large vallecular cyst that was discovered during induction of general anesthesia. A 47-year-old man presented for elective laparoscopic colecystectomy due to GB polyp. He had normal mouth opening and neck extension; no mass or distortions of the tongue or neck were observed. Anesthesia and paralysis were induced with 80 ㎎ propofol, alfentanil 0.5 ㎎, midazolam 2.0 ㎎ and rocuromum 50 ㎎. It was noted that ventilation of the lungs via mask was difficult. Despite insertion of an oropharyngeal airway, ventilation proved to be more difficult. Intubation was attempted. Direct laryngoscopy (Macintosh 3 blade) revealed a 3-4 ㎝ tranlucent cyst arising from the left vallecula. The cyst completely obscured the view of epiglottis and vocal cords, preventing intubation despite multiple attempts by three anesthesiologists. StafF anesthesiologist was aspirated cyst using a 16-guage needle, syringe and 20 ㎖ of serous fluid were aspirated from cyst. The epiglottis and vocal cord were then exposed and tracheal intubation was performed easily with a size 7.0 cuffed oral tracheal tube. Anesthesia and the operation then proceeded uneventfully, following laparoscopic colecystectomy, an ENT surgeon removed the cyst.

敎育大學 美術科敎育 實技能力 仲張方案 : 實態調査 分析을 通하여

梁哲模,沈鳳燮,金鍾根 釜山敎育大學 1987 부산교육대학 논문집 Vol.23 No.1

과도한 운동으로 발생한 횡문근융해증에 의한 급성신부전증 1예

문철호,류보열,모성환,김태종,기장도,박용관,김용환,정종훈 조선대학교 1995 The Medical Journal of Chosun University Vol.20 No.1

Rhabdomyolysis may be defined as a clinical and laboratory syndrome which releases muscle cell contents into the plasma, such as creatine phosphokinase, due to skeletal muscle injuries. It can be the result of many diverse causes including muscle disease, ischemia, genetic disorder, metabolic disorder, infectious disease, drugs, comatose state, trauma or vigorous exercise that can lead to acute renal failure as a complication. Since first reported in 1941, rhabdomyolysis-induced acute renal failure has been documented many times, and the major causes of this disease are carbon monoxide poisoning, snake bites, and etc in Korea Reports of acute renal failure after exercise-related rhabdomyolysis with myoglobinemia are rare. We report a case of acute renal failure caused by exercise-related rhabdomyolysis in a 20 year old man.

von Willebrand's diseasee 1예

박치영,모성환,문철호,곽재정,김태종,전용준,박유환,정춘해 조선의대 1995 The Medical Journal of Chosun University Vol.20 No.2

다발성 골수종으로 이행한 단일형질세포종 1예

정재용,모성환,기장도,문철호,김창욱,전용준,박유환,정춘해,오윤경 조선의대 1995 The Medical Journal of Chosun University Vol.20 No.2

von Willebrand's disease 1예

박치영,모성환,문철호,곽재정,김태종,전용준,박유환,정춘해 朝鮮大學校 附設 醫學硏究所 1995 The Medical Journal of Chosun University Vol.20 No.2

von Willebrand's disease (vWD) is the most common autosomal-dominant inherited disorder resulting from a quantitative or a qualitative defect of von Willebrand factor (vWF). The most diagnostic pattern is the combination of a prolonged bleeding time, a reduction in plasma vWF concentration, a parallel reduction in ristocetin cofactor activity, and reduced factor Ⅷ activity, In this case, ristocetin-induced platelet aggregation data were compatible with that of vWD. Bleeding times were prolonged over 4 minutes, vWF antigen levels were 45%. vWF ristocetin cofactor activities were 0~1% and factor Ⅷ levels were 31%, when compared to the normal control. We report the case of a family with vWD. characterized by a quantitative defect in vWF

김치 starter 용으로 분리한 효모의 동정

김혜자,이철수,김영찬,양차범,강상모 한국미생물생명공학회 ( 구 한국산업미생물학회 ) 1996 한국미생물·생명공학회지 Vol.24 No.4

김치발효로 인해 생성되는 유기산 중 젖산과 초산을 탄소원으로 이용하며, 통기적 성질을 가지며, 어느 정도 저온성(10℃)과 내산성(pH 3.2)의 성질을 갖는 11균주를 김치로부터 순수분리하였다. 이들 분리 균주는 형태적, 배양적 및 생리적 특성에 의해 진균류에 속하는 3종류의 속으로 분류되었다. 첫번째로 YK-6과 YK-10 균주는 Debaryomyces속으로 분류되었으며, 이 중 YK-10 균주는 Debaryomyces coudertii로 동정되었고, 두번째로 YK-11, YH-4 및 균주는 Pichia속으로 분류되었다. 이 중 YK-11 균주는 Pichia media, YH-4 균주는 Pichia chambardii, 그리고 YH-5 Pichia haplophilia로 동정되었다. 세번째로 YK-12, YK-17, YK-18, YK-19, YK-20 및 YH-3 균주는 Saccharomyces속으로 분류되었으며, 이 중 YK-19 균주는 Saccharomyces fermentati로 동정되었다. 분리균주의 산 이용성을 실험하기 위하여 최소배지 및 젖산과 초산의 유기산 첨가 배지에서 생육도를 측정하였는데 균분리시와 틀리는 미량금속이 함유되지 않은 최소배지에서도 모두 자랐다. 특히 Saccharomyces sp. YK-17와 Saccharomyces fermentati YK-19가 생육상태가 비교적 좋았으며, 두 균주 모두 젖산 0.3%과 초산 0.6% 첨가시는 낮은 생육을 보였다. 이중 YK-19 균주는 25℃에서 보다 10℃에서 더 잘 자라는 저온성 균주로 판명되었다. The eleven strains, which could be used lactic and acetic acids as carbon sources, were isolated from kimchi and identified; the strains were facultative microorganisms which could be grown at low temperature (10℃) and around pH 3.2. As results of morphological, biochemical and physiological tests, 5 species of 3 genera were identified as Debaryomyces coudertii, Pichia media, Pichia chambardii, Pichia haplophilia and Saccharomyces fermentati. Each strain was grown in basal media. In acidic resistance and acid utiliztion test, Saccharomyces sp. YK-17 and Saccharomyces fermentati YK-19 were grown well in basal and YM media containing 0.3% lactic acid. And two strains were grown in basal and YM media containing 0.3% lactic acid and 0.6% acetic acid. Since strain YK-19 was grown better at 10℃ than that in 25℃, strain YK-19 was known to be a psychrophilic strain.

만성 호중구성 백혈병 1례

기장도,박치영,류보열,김태종,모성환,곽재정,문철호,박근홍,박유환,정춘해 朝鮮大學校 附設 醫學硏究所 1996 The Medical Journal of Chosun University Vol.21 No.1

Chronic neutrophilic leukemia is a very rare myeloproliferative disorder which is characterized by severe sustained mature neutrophilic leukocytosis in peripheral blood (PB), hepatosplenomegaly, elevated leukocyte alkaline phosphatase, serum uric acid. serun viatmin B 12 and the bleeding tendency despite normal platelet count and coagulation time, absence of philadelphia chromosome, and the absence of fever or underlying infection or disease sufficient to mimic a leukemoid reaction. We have experienced a 34-years-old male patient with atypical chronic neutrophilic leukemia. On admission, the leukocyte count was 56,860/uL. severe neutrophic leukocytosis with 76% neutrophils and rare immature forms on PB smear. Many neutrophils had toxic granules, and vacuoloes. Leukocyte alkaline phosphatase score was decreased. The cytogenetic study showed Philadelphia chromosome negative with normal karyotype.