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서성규,이정섭,송준석 國立麗水大學校 環境問題硏究所 2004 環境硏究論文集 Vol.6 No.-
This study was investigated the effects of various system parameters on the absorption of carbon dioxide into absorption solution. An aqueous potassium carbonate solution was used as a chemical absorbent in order to figure out the effect of chemical reaction. For this purpose, the chemical analysis of potassium carbonate solution was performed. The changes of pressure, temperature, K₂CO₃solution flow/feed gas ratio and solution concentration in the absorber and the changes of pressure and temperature in the stripper were also analyzed. The analysis result shows that K₂CO₃ concentration in potassium carbonate solution was 99.6%. The optimum pressure was found to be 27.0㎏/㎠ and the optimum temperature was to be 68℃, the optimum concentration of potassium carbonate solution was to be 26.0wt% in the absorber. The CO₂ leakage decreased with the increment of the K₂CO₃ solution flow/feed gas ratio. But the H₂ leakage in the CO₂ product increased at or above the K₂CO₃ solution flow/feed gas ratio of 1.10. This H₂ leakage induced by the loss of ammonia production. The effects of the changes of the operation condition of the CO₂ stripper to the K₂CO₃ conversion are as follows. The K₂CO₃ conversion decreased as the pressure decreased. The K₂CO₃ conversion increased as the temperature increased. However, increasing the temperature without decreasing the pressure did not bring positive effect. The optimum pressure was found to be 0.45㎏/㎠.
광파이버 변위 센서를 이용한 자기베어링 계의 부상 제어
강종규,신우철,송관의,홍준희 충남대학교 공업교육연구소 2003 論文集 Vol.26 No.1
Five expensive sensors are necessary to control a magnetic bearing system. The sensor price rate of magnetic bearing system is high. So it is necessary that cheap and good sensor is developed. The optical fiber displacement sensor is adaptive to satisfy this condition. We can design magnetically suspended spindle based on static characteristic of optical fiber displacement sensor developed. The controller can be designed by decoupled feedback PD. Therefore, it is simpler than any other controller comparatively.
최서희,전준수,송민규,이재건,이순흠 순천향대학교 부설 산업기술연구소 2021 순천향 산업기술연구소논문집 Vol.27 No.2
If we are looking for something that can be found anywhere in public places, homes, and and even toilets, we will be able to choose a mirror that can easily reflect us. To satisfy the convenience needs of people, we can automatically introduce various useful information on mirrors that are often used by anyone, or add functions such as measuring human body temperature in line with the recent trend of public health due to the COVID-19 pandemic. The system presented in this paper aims to improve the convenience of users who frequently look in the mirror by displaying visual information on a translucent mirror as well as being able to reflect the image as explained above.
다발성 대장암 간전이 환자의 간절제를 위한 새로운 시도
주종우,김형철,임철완,신응진,조규석,유기원,송옥평,홍대식,박성진,조준희,이혜경,김희경,권계원,고은석 순천향의학연구소;Soonchunhyang Medical Research Institute 2004 Journal of Soonchunhyang Medical Science Vol.10 No.2
Multiple bilobar liver matastases (MBLM) are the main cause of low resectability in the colon cancer liver metastases. The authors experienced one case of initially non-resectable colon cancer liver metastases. He was curatively and safely treated with a two-stage hepatectomy using the new method of future remnant liver volume growing. A 54-year-old man was referred to our department with the sigmoid colon cancer combined with MBLM, which were checked in two small metastatic lesions in the left lobe and five large sized lesions in the right lobe in the computed tomogram (CT). A laparoscopic assisted anterior resection was primarily performed. We performed the 1^(st) stage hepatectomy 3 weeks after the colon resection. Intra-operative Ultrasonogram (US) found 9 small superficial metastatic lesions in the left lobe. All that lesions were completely removed by non-anatomical wedge resection. An occlusion ballon catheter was placed in the right portal vein through a small branch of the inferior mesenteric vein at that time. The future remnant liver volume was sufficiently increased 3 weeks after the 1^(st) hepatectomy. A right hepatectomy was safely performed 22 days after the 1^(st) hepatectomy. The patient received a regional chemotherapy (interleukin2 based immuno-chemotherapy through hepatic artery) for 4 months, then received 9 cycles of systemic chemotherapy (biweekly Oxaliplation, leucovorin, plus 5-fluorouracil) without any recurrence evidence.
A case of refractory uremic pleuritis successfully treated with corticosteroid
( Jun Gyu Song ),( Sae Han Kang ),( Byung Wook Jung ),( Byung Woo Yoon ),( Yong Geon Song ),( Chang Kyun Lee ),( Tae Yeon Lee ),( Young Min Koh ),( Hyeon Sik Oh ),( Seung Hyeun Lee ) 대한내과학회 2015 대한내과학회 추계학술대회 Vol.2015 No.1
Uremic pleuritis is a fibrous pleuritis of unknown pathogenesis in patients with end stage renal disease. Although uremic pleuritis generally responds to regular hemodialysis, cases that are refractory to dialysis or repeated thoracentesis have been reported. Treatment of refractory uremic pleuritis has not been established yet. We report a case of refractory uremic pleuritis which showed marked improvement following corticosteroid therapy. A 53-year-old man who had been on hemodialysis therapy for chronic kidney disease for 5 years was admitted to our hospital presenting with right side pleural effusion and dyspnea. Pleural fluid was straw-colored and exudate in nature. Cytologic examination, microbiologic test for bacteria, fugi, tuberculosis and adenosine deaminase assay had negative results. A pleural biopsy revealed chronic inflammation with fibrosis without any evidence of tuberculosis or malignancy. The pleural effusion did not respond to repeated thoracentesis and continuance of hemodialysis. With a diagnosis of refractory uremic pleuritis, we started prednisone 30 mg per day and tapered it out in 2 months. The pleural effusion responded to the treatment and completely resolved without complication.
Squamous cell carcinoma presenting as verruca vulgaris
( Jun Gyu Song ),( You Bum Song ),( Moo Kyu Suh ),( Jae Hong Kim ),( Jong Im Lee ) 대한피부과학회 2016 대한피부과학회 학술발표대회집 Vol.68 No.1
Squamous cell carcinoma may occur anywhere on the skin and mucous membranes with squamous epithelium. It can develop either in sun-damaged skin or from a solar keratosis. Clinical presentation can be variable despite the existence of easily identified typical lesions. The characteristic clinical finding is a firm, flesh-colored or erythematous, keratotic papule or plaque. Other presentations include as an ulcer, a smooth nodule, or a thick cutaneous horn. And squamous cell carcinoma rarely looks like verruca vulgaris. We report a case of squamous cell carcinoma in a 70 year-old-male. He presented with a solitary asymptomatic yellowish to erythematous plaque on the forehead for 1year. Histopathologic examination revealed hyperkeratosis, parakeratosis, invasion of dermis by atypical keratinocytes, individual cell keratinization, nuclear atypia. Because of these histologic findings, squamous cell carcinoma was diagnosed. He was treated with the wide excision. The lesions healed without sequelae and recurrence.
Tinea capitis caused by Trichophyton rubrum in a 81-year-old woman
( Jun Gyu Song ),( You Bum Song ),( Moo Kyu Suh ),( Gyoung Yim Ha ),( Tae Jung Jang ) 대한피부과학회 2015 대한피부과학회 학술발표대회집 Vol.67 No.1
Trichophyton(T.) rubrum is an anthropophilic dermatophyte that is found all over the world. It has become one of the most important causative agents in tinea unguium and tinea pedis. But tinea capitis caused by T. rubrum is rare. Tinea capitis is ucommon in adult. We report a case of tinea capitis caused by T. rubrum in a 81-year-old woman. She presented with localized asymptomatic well-demarcated fine scaly hyperkeratotic erythematous patches on the fronto-vertex scalp for 6 months. She was diagnosed as seborrheic dermatitis in local clinic and was treated with topical steroid. However, the lesion was not improved. A fungal culture from tissue of the lesions was grown on Sabouraud``s dextrose agar and showed typical whitish cottony colonies of T. rubrum. She was treated with 200mg of oral itraconazole daily for 6weeks. The skin lesions improved 2 weeks after treatment, and recurrence has not been observed.