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전극의 재료와 두께가 필름형 압전 센서와의 접착특성에 미치는 영향
박세기(Se Gi Park),황희윤(Hui Yun Hwang) 대한기계학회 2014 대한기계학회 춘추학술대회 Vol.2014 No.11
In order to measure the electric signals of PVDF piezoelectric sensors, electrodes should be reliably fabricated on the sensor surfaces. For this reason, we investigated the effect of the material and thickness of electrodes on the adhesion characteristics to the film type piezoelectric sensors. Gold, Platinum and silver were coated on the sensor surfaces by the plasma sputter under the 0.08 mbar of the vacuum pressure and 30mA of the sputtering current with respect to the coating time. We conducted adhesion tests (scratch test, pull-out test) between the film and the electrode. Also, we observed the coating thickness and adhesion interface by AFM(Atomic Force Microscope). Adhesion strength varied depending on the electrode materials and electrode Thickness.
Recursive 구조를 이용한 MPEG-2 AAC 복호화기의 필터뱅크 구현
박세기,강명수,오신범,이채욱 한국통신학회 2004 韓國通信學會論文誌 Vol.29 No.6C
MPEG-2 Advanced Audio Coding(AAC) is widely used in the multi-channel audio compression standards. And it combines hi인-resolution filter bank prediction techniques, and Huffman coding algorithm to achieve the broadcast-quality audio level at very low data rates. The forward and inverse modified discrete transforms which are operated in the encoder and the decoder of the filter bank need many computations. In this paper, we propose suitable recursive structure at IMDCT processing for MPEG-2 AAC real-time decoder. We confirm the memory, the computation speed and complexity of the proposed structure.
혈부축어탕(血府逐瘀湯)이 혈전생성관여인자(血栓生成關與因子)에 미치는 영향(影響)
박종형,한양희,전찬용,김동우,박세기,이청정혜,고승희,고재철,최유경,김영선,Park, Jong-Hyung,Han, Yang-Hi,Jun, Chan-Yong,Kim, Dong-U,Park, Se-Gi,Lee, Chung-Jung-Hye,Go, Seung-Hi,Go, Jae-Chul,Choi, You-Kyung,Kim, Young-Sun 대한한방내과학회 2000 大韓韓方內科學會誌 Vol.21 No.5
Purpose : To investigate the inhibitory effect of HCE on platelet aggragation and erythrocyte deformiability, we performed following experiments. Methods : Concentrated Hyulbuchukotang (HCE) was fed to rats for 10days. We compare normal group with $500{\beta}{\Sigma}/{\beta}{\Sigma}$-high dose group and $100{\beta}{\Sigma}/{\beta}{\Pi}$-low dose group. Results : HCE enhanced the blood filtration rate, erythrocyte deformiability, reduced the platelet aggreablilty and inhibited granule release from collagen stimulated platelet, the prostaglandin synthesis in platelat. Conclusion : HCE should inhibit thrombos formation due to platelet hyperaggraeability and reduction of erythrocyte defonmiability.
청심보혈탕(淸心補血湯)의 항암(抗癌) 및 면역증강효과(免疫增强效果)에 관(關)한 실험적(實驗的) 연구(硏究)
박세기,류봉하,박동원,류기원,Park, Se-Ki,Ryu, Bong-Ha,Park, Dong-Won,Ryu, Ki-Won 대한한방내과학회 1998 大韓韓方內科學會誌 Vol.19 No.1
The aim of this experimental study was to evaluate the anti-tumor effects of Chungsimbohyeltang through investigation about viability of tumor cell by MTT assay, survival period of mice transplanted with L-1210 cells, growth inhibition on the tumor cell, body weight variation in mice transplanted with sarcoma-180 cells and its immunomodulatory effects through the investigation on delayed type hyper-sensitivity, the hemagglutinin and hemolysin titers for humoral immune response, the appearance of rosette forming cells for cell-mediated immune response, the natural killer cell activity, the transformation of lymphocyte, the productivity of Interleukin-2 and phagocytic index K was performed in immune-depressed ICR mice induced by methotrexate treatments. The results were as follows ; 1. $IC_{50}$ of Chungsimbohyeltang treated group was 5.85mg/ml in SNU-C4 cell, 1.38mg/ml in SNU-396 cell, 0.21mg/ml in SNU-1 cell, so it had low anti-tumor activity. 2. The both groups of Chungsimbohyeltang extract 10mg/kg and Chungsimbohyeltang extract 20mg/kg had no toxicity and the group of Chungsimbohyeltang 20mg/kg which was shown 120% in ILS had the effect of life prolongation in mice transplanted with L-1210 cells. 3. In the growth inhibition on the tumor cells, only the group of Chungsimbohyeltang extract 20mg/kg was noted and in the weight variation in mice transplanted with sarcoma-180 cells, both groups of Chungsimbohyeltang extract had a significant effect. 4. In the delayed type hypersensitivity and appearance of rosette forming cells, both groups of Chungsimbohyeltang extract didn't have any significant effect. 5. The hemagglutinin titers was slightly increased with no significance, and the hemolysin titers was significantly increased in the only group of Chungsimbohyeltang extract 20mg/kg. 6. The natural killer cell activity of the Chungsimbohyeltang extract groups was significantly increased in the ratio of 100:1 of effector and target cells, but it was not significantly increased in the ratio of 50:1, 10:1. 7. The transformation of lymphocyte and the productivity of Interleukin-2 were increased significantly and in dose-dependent manner in both group of Chungsimbohyeltang extract. 8. The phagocytic effect of macropage was significantly increased in both groups of Chungsimbohyeltang extract. Considering the results above, we could conclude that Chungsimbohyeltang have an indirect anti-tumor effect through the modulation of immunme response, although it had not toxicity on the tumor cell it self.
박종형,한양희,김동우,전찬용,박세기,백은기,박지윤,한지완,임영남,홍의실,Park Chong-Hyeong,Han Yang-Hee,Kim Dong-Woo,Jun Chan-Yong,Park Se-Ki,Beak Eun-Ki,Park Ji-Yoon,Han Ji-Wan,Yim Young-Nam,Hong Ui-Sil 대한한방내과학회 2003 大韓韓方內科學會誌 Vol.24 No.2
Acute pancreatitis is the acute inflammatory disease of the pancreas. and abcomal pain on demanding emergency care is the major symptom of acute pancreatitis. In these two cases, we administrated oriental medical treatment with medical treatment such as fluid injection. After administration of these medication, clinical symtoms and clinicopathological figure improved. Oriental medical treatment showed disirable effect on acute pancreatitis.
박세기,이천,김무성,Park, Se-Ki,Lee, Cheon,Kim, Moo-Sung 한국전기전자재료학회 1996 電氣電子材料學會誌 Vol.9 No.3
Non-ozone layer destructive Chlorofluorocarbon(CFC) altematives(CHCIF$_{2}$ and $C_{2}$H$_{2}$F$_{4}$) have been initially used for laser-induced thenrmochemical etching of GaAs. High etching rate up to 188.mu.m/sec and an aspect ratio of 2.7 have been achieved by a single scan of laser beam, respectively. The etching rate at constant ambient gas pressure was found to saturate for beam power. The chemical compositions of the reaction products deposited on the etched groove were measured by Auger electron microscopy(AES). Etched profile, depth and width were observed by scanning electron microscope(SEM).
청소년궤양성 대장염 환자의 사상체질요법에 대한 증례보고
박세기,김근엽,신선미,고흥,Park, Se-gi,Kim, Geun-yeob,Shin, Seon-mi,Ko, Heung 대한한방내과학회 2017 大韓韓方內科學會誌 Vol.38 No.4
Objectives: This study discusses the effects of constitution therapy on adolescent ulcerative colitis. Methods: A 12-year-old male patient was treated with western medication for six months and herbal medicine for one year and six years; however, his abdominal pain, mucousy stool, bloody stool, and diarrhea persisted. He was diagnosed as having Taeumin according to Sasang constitution classification and treated with Sasang constitutional medicine (i.e., Yeuldahanso-tang and food restrictions based on constitutional medicine theory). Before the first treatment, his Pediatric Ulcerative Colitis Activity Index (PUCAI) score was 35, but this score decreased to 15 within six months and was maintained at 10 by 18 months of treatment. He took the herbal medication for 38 months, and his PUCAI score was 0 at the end of treatment. His liver functioned normally despite long-term drug use, and a follow-up colonoscopy showed no ulcerative colitis except melanosis, which was presumed to be caused by the herbal medicine. Ulcerative colitis in pediatric adolescents requires treatment with pharmacotherapy and dietary control based on constitutional medicine to maintain disease remission. Conclusions: Constitutional therapy is effective for treating adolescent ulcerative colitis. More clinical data are needed for patients with ulcerative colitis.