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개에서 후두수직절반 이식 후 형태 및 기능에 대한 연구
김영찬,최홍식,정유삼,양해동,김태만,강성석,정형진,조성우,이성민 대한후두음성언어의학회 1999 대한후두음성언어의학회지 Vol.10 No.2
In this study, the author developed a new animal model to examine morphological changes and functional recoveries after vertical hemilaryngeal transplantation in the canine. Seven vertical hemilaryngeal transplantations were carried out in the canine. After preparing the host dog removing right sided hemilarynx, hemilarynx of the donor dog was transplanted by hooking up the arteries, veins, nerves and hypopharyngeal mucosa. Especially, recurrent laryngeal nerve was anastomosed at the branch level(anterior and posterior) respectively. After 7 days, for the first evaluation of the transplantation, four out of seven dogs were considered successful. Three dogs survived more than one month, which is the critical period to evaluate the functional recovery after transplantations. After EMG examination, two dogs(#3, #5 dog) showed some functional recoveries. The five-transplanted hemilarynges were sectioned at the arytenoid cartilage region to examine the morphological changes. The results showed that the transplanted hemilarynx appeared normal as control in #5 dog. In addition, #2 dog showed fairly good condition even though died from asphyxia after 9 days out of transplantation. The other. three dogs(#3, #6, #7) showed various levels of atrophy and disappearance of the muscles and cartilages in their larynges. It can be suggested that this model could contribute an advance to preparing human laryngeal transplantation in the future.
The Effect of Copper on Feeding Characteristics in Al-Si Alloys
김영찬,조재익 한국주조공학회 2023 한국주조공학회지 Vol.43 No.6
The effects of Cu on feeding and macro-porosity characteristics were investigated in hypo- (A356 and 319) and hypereutectic(391) aluminum–silicon alloys. T-section and Tatur tests showed that the feeding and macro-porosity characteristics were sig-nificantly different between the hypo- and hypereutectic alloys. The hole and the pipe in the T-section and the Tatur casting inhypereutectic alloy showed a rough and irregular shape due to the faceted growth of the primary silicon, while the results of thehypoeutectic alloys exhibited a rather smooth surface. However, the addition of Cu did not strongly affect the macro-feeding behav-ior. It is known that copper segregates and interferes the feeding process in the last stage of solidification, possibly leading to formmore amount of micro shrinkage porosity by the addition of Cu. The macro porosity formation mechanism and feeding propertieswere discussed upon T-section and Tatur tests together with an alloying addition.
정관복원술 실패 후 정세포 발육정지의 소견을 보인 경우를 약물적 치료와 재수술을 시행하여 정상 정액을 얻은 환자에서 논의할 사항들
김영찬,Kim, Young-Chan 대한생식의학회 1996 Clinical and Experimental Reproductive Medicine Vol.23 No.1
Here, A forty year old patient is presented, showing azoospermia following vasovasostomy. The bilateral testicular biopsies were performed to confirm whether ductal obstruction due to vasovasostomy or testicular failure existed. The finding of biopsy was spermatogenic arrest. After completion of medical testicular stimulation with clomiphene citrate and pentoxifilline for 3 months, repeat vasovasostomy was performed. Semenanaylsis revealed normal sperm parameters after operation. Necessity of testicular biopsy before deciding repeat vasovasostomy, accuracy of testicular biopsy, efficacy of testicular stimulation in the patient with spermatogenic arrest and effect of testicular biopsy on testicular fuction are discussed.
김영찬,Kim, Yeoung-Chan 한국정보기술전략혁신학회 2005 情報學硏究 Vol.8 No.2
In this study, we made experiments the preparation of silver halide microcrystals, physical ripening, chemical ripening, spectral sensitivity, additives and coating in order to develop medical laser scanner film which has photographic characteristic suitable for exposure to He-Ne and Ar laser. In the practice of sensitometry, the photographic material is exposed to a known quantity and quality of radiant energy, developed under standard conditions, and the densities resulting from the various exposures are then measured. The results are usually expressed in graphic form as curves, and from these curves numerical values are derived which are used to specify the characteristics of the material.
김영찬 한국비평문학회 2023 批評文學 Vol.- No.87
Park Tae―soon's novel was overflowing with self―consciousness and confusion of the 4·19 generations, which were embedded in the daily lives of the petit bourgeois, and a willingness to criticize both the world of Korean reality and oneself. Park Tae―soon's novel persistently traces the divided inner side of young snobs in the 1960s who wanted to escape but were trapped in a daily order that could not escape. In particular, "The Fallen Theater" is a novel that remembers and reflects on the political implications it can have while describing the peak of confusion and disorder. Park Tae―soon talks about the revolutionary potential of unsublimated confusion and disorder that overflowed through reason, order, and norms. The persistent criticism of snobbery, the affirmation of disorder, and the impulse of hidden deviations that show their faces everywhere are, in a way, traces of a literary struggle to capture the memory of the "truth" of the collapsed theater in the middle of the devastation of the 1960s. The confusion and disorder of Park Tae―soon's novel is a symptom of the difficulties and hardships of the literary struggle, and on the other hand, it is a self―conscious positive product of the unsublimated disorder that distanced itself from the normative order or aesthetic refinement of the novels. 1960년대 박태순 소설의 배면에 있는 것은 국가 주도의 성장과 개발의 논리가 대중의 일상과 집단의식을 장악해가던 한국적 상황이다. 박태순의 소설은 소시민적 일상에 함몰된 4·19세대의 자의식과 혼란, 그리고 그런 한국적 현실의 세태와 자기 자신을 아울러 겨냥하는 비판의 의지로 넘치고 있었다. 박태순의 소설은 벗어나고 싶지만 벗어날 수 없는 소시민적 질서에 갇혀버린 1960년대 젊은 속물들의 분열된 내면을 집요하게 추적한다. 특히 박태순은 「무너진 극장」에서 이성과 질서와 규범을 뚫고 초과해 흘러넘쳤던, 승화되지 않은 혼란과 무질서가 갖는 혁명적 잠재성을 이야기한다. 소시민의식에 대한 집요한 (자기)비판과 무질서의 긍정, 곳곳에서 얼굴을 내비치는 숨은 일탈의 충동은 1960년대의 황폐 한가운데서 「무너진 극장」의 ‘나’가 파괴적 무질서의 현장에서 언뜻 엿보았던 ‘진실’의 기억을 어떻게든 붙잡으려는 문학적 분투의 흔적이다. 박태순 소설의 혼란과 무질서는 그 문학적 분투의 난경과 지난함을 보여주는 증상이면서, 다른 한편 소설의 규범적 질서나 미적 세련과 거리를 두는 승화되지 않은 무질서에 대한 자의식적인 긍정의 소산이다.