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박철우,정동웅,김태형,김두영 東亞大學校 附設 情報通信硏究所 1996 情報通信硏究所論文誌 Vol.4 No.1
In this paper, in order to reduce block search area during the process to determine the coefficient of IFS transform equation in Fractal Coding, We performed the following steps : First, We partitioned Domain blocks and Range blocks with certain critical point determined by the edge characteristcs and the direction of brightness. When similar block's detected, the Domain block in the same class of the given range was only searched. Second, When the processing is on, We determined the linear list structure with the second error limit, We, therefore, could control coding time, We tryed to improve the compression rate of the Image with reducing the number of times of tranformation by changing the area of block with Quadtree Partitioning, and also tried to progress the fidelity of the image by changing the search density of search area, according to the magnitude of range block. We applied these method to image compression of 24-bpp color. First of all, after converting the RGB coordinate into YIQ Coordinate which has brightness signal and chrominance signal, We minimized by a quarter and coded I,Q signal which implies the information of the color but takes just small part at image information and on the case of decoding, with linear interpolation method we got I,Q signal enlarged as it was. All throughout these processing, We could find out that There are no damages on the original image, and we are able to make better result on compression rate and fidelity of image comparing with those of conventional Fractal Coding method which was applied to the RGB images.
용철순,이신웅,전철수,채희상,신원섭,백우현 영남대학교 약품개발연구소 1995 영남대학교 약품개발연구소 연구업적집 Vol.5 No.-
The purpose of this study was to determine pharmacokinetic parameters of BR-28702-2, a new antineoplastic agent which is the conjugate of nucleotide and phospholipid, and to compare them with those of ara-C. Male rats were cannulated in the left femoral vein and received a single i.v. bolus dose of either BR-28702-2 or ara-C. BR-28702-2 was also administered i.p. and plasma samples were analyzed by reversed-phase HPLC. The t_(L/2(β)) of ara-C(1.22 hr.) was significantly smaller than that of BR-28702-2(4.420 hr.). The absolute bioavailability of BR-28702-2 after i.p. injection was 1.125%. This lower bioavailability, together with previous reports that marked antineoplastic activity was observed when given i.p., indicates that BR-28702-2 would act as a depot system to release active moieties. Further works. therefore, need to be done to characterize active metabolites.
황성철,김준명,이승우,심원흠,조승연,이웅구,조범구,홍승록 대한내과학회 1990 대한내과학회지 Vol.38 No.3
Prosthetic valve endocarditis is an infrequent but a serious complication of cardiac valve replacement associated with unacceptablely high mortality. Although the incidence of prosthetic valve endocarditis may be declining, the absolute number of surgery. However, in Korea, there has been few reports concerning this matter, so we have carried out a clinical analysis of 24 patients with prosthetic valve endocarditis who were diagnosed and treated at Yonsei medical center from January 1980 through December 1988. The overall frequency of prosthetic valve endocarditis was approximately 2.6%. The frequency of early-and late-onset infection was 0.9% and 1.7% respectively. Male to female ratio was 2.4 to 1. There were no predilections as to the anatomic location of the replaced valves or the types of prostheses used in the operation. Common prosenting symptons were fever(79.2%), dyspnea(70. 8%), and anorexia(62.5%). Physical findings were often non-specific and they include newly developed or changing murmurs(66.7%), hepatomegaly(41.7%) and splenomegaly(25.8%). They seldom presented with Osler's node(20.8%), petechiae(16.7%) or Janeway's lesion(12.5%). In addition, abnormal laboratory features include anemia(75.0%), hematuria(62.5%), leukocytosis(50.0%) and non-specific electrocardiographic abnormalities. Vegetations were present in 6 of 17 patients who were examined echocardiographically. Identifiable predisposing factors or the possible sources of indection were dental manipulation or periodontal diseases, osteomyelitis of sternum, wound infection, pneumonia, periodontal diseases, urinary tract infection and infected intravenous catheters. The results of blood culture were positive in 17 of 24 cases(70.8%). Alpha-streptococcus was the most frequently isolated organisms accounting for 29.4% of the positive cultures and was generally associated with a good prognosis. In contrast, Staphylococcus coagulase negative, Pseudomonas aeruginosa, Staphylococcus epidermidis showed high incidence of resistance to conventional antibiotics and consequently resulted in poor prognosis. Complications were congestive heart failure(28.6%), embolism(28.6%), sepsis with shock(14.3%) and acute renal failure(3.6%). Common site of embolism was brain. Overall mortality among patients with prosthetic valve endocarditis was 50.0%; the mortality among patients with prosthetic valve endocarditis were 50.0% and 50. 0% respectively. Medical treatment was carried out in 20 patients and its mortality was 55.0%. Surgical intervention was carried out in 4 patients and it was successful in three cases.
Woong Chul Lee,Hyeon Woong Yang,Yun Jung Lee,Sung Hee Jung,Gi Young Choi,Hoon Go,Anna Kim,Sang Woo Cha 대한의학회 2008 Journal of Korean medical science Vol.23 No.3
Brunner’s gland hyperplasia is a benign tumor of the duodenum and it is rarely associated with clinical symptoms. We report on a 64-yr-old man with Brunner’s gland hyperplasia who had undergone a duodenocephalo-pancreatectomy. The reason is that he presented upper gastrointestinal obstructive symptoms and the esophagogastroduodenoscopic finding revealed the lesion to be an infiltrating type mass on the second portion of the duodenum with luminal narrowing. An abdominal computed tomography showed a 2.5 cm-sized mass in the duodenal second portion with a suspicious pancreatic invasion and 7 mm-sized lymph node around the duodenum. Duodenocephalopancreatectomy was successfully performed. Histological examination revealed a Brunner’s gland hyperplasia. The final diagnosis was the coexistence of Brunner’s gland hyperplasia and pancreatic heterotopia with a pancreatic head invasion. The literature on Brunner’s gland hyperplasia is reviewed.
Assessing Renal Ischemia/Reperfusion Injury in Mice Using Time-Dependent BOLD and DTI at 9.4 T
Woo, Dong-Cheol,Kim, Nayoung,Lee, Do-Wan,Song, Youyol,Shim, Woo Hyun,Choi, Yoonseok,Woo, Chul-Woong,Kim, Sang-Tae,Kim, Jeong-Kon,Kim, Kyungwon,Ha, Hyun-Kwon,Lee, Jin Seong Springer-Verlag 2015 Applied magnetic resonance Vol.46 No.6
Woo, Jang Chun,Bae, Woong Jin,Kim, Su Jin,Kim, Sung Dae,Sohn, Dong Wan,Hong, Sung Hoo,Lee, Ji Youl,Hwang, Tae-Kon,Sung, Young Chul,Kim, Sae Woong 대한비뇨기과학회 2011 Investigative and Clinical Urology Vol.52 No.5
<P><B>Purpose</B></P><P>Muscle-derived stem cells (MDSCs) harvested from skeletal muscles have the advantage of providing easier access and do not pose the immunogenic risks of embryonic stem cells. We investigated the effect of intracavernosal transplantation of MDSCs on erectile function in rats with bilateral cavernous nerve injury.</P><P><B>Materials and Methods</B></P><P>Adult male white rats underwent experimentation in 3 groups: group I, sham operation; group II, bilateral cavernous nerve injury; group III, bilateral cavernous nerve injury with MDSC injection. MDSCs were harvested from the femoral muscle of rats and were then injected into the cavernosum. Survival of MDSCs and measurement of erectile function was studied after 4 weeks. We checked the intracavernosal pressure (ICP) and obtained penile tissue. The expression of cyclic guanosine monophosphate (cGMP) was analyzed.</P><P><B>Results</B></P><P>Four weeks after transplantation, PKH-26-labeled MDSCs were identified in the cavernosal tissues of group III. Peak ICP and the drop rate of group II were 52±8.7 mmHg and 34±6.5 mmHg/min, respectively, whereas peak ICP and the drop rate of group III were 97±15.6 mmHg and 17±4.9 mmHg/min, respectively, showing that erectile function improved after MDSC transplantation (p<0.05). The expression of cGMP was significantly lower in group II (21.9±5.8 fmol/well) than in group I and group III (70.2±10.3 and 58.9±10.5 fmol/well, respectively).</P><P><B>Conclusions</B></P><P>In a cavernous nerve injury rat model, intracavernosal transplantation of MDSCs showed acceptable survival of MDSCs as well as improvement of erectile function.</P>
Functional Chemical Components in Protaetia brevitarsis Larvae: Impact of Supplementary Feeds
Chul-Ho Yoon,Seung-Ho Jeon,Yeon Jo Ha,Sam Woong Kim,Woo Young Bang,Kyu Ho Bang,Sang Wan Gal,Il-Suk Kim,Young-Son Cho 한국축산식품학회 2020 한국축산식품학회지 Vol.40 No.3
The goal of this study was to evaluate the influence of various supplementary feeds on the chemical composition and production of bioactive substances in Protaetia brevitarsis larvae. The primary feed—oak-fermented sawdust—was supplemented with a variety of substances, including aloe, apple, banana, sweet persimmon (S. persimmon) and sweet pumpkin (S. pumpkin). Crude protein and fat content were the highest in the control and S. pumpkin group, respectively. Supplementary feeds increased the content of unsaturated fatty acids, except in the group receiving S. pumpkin, in which oleic acid was the most abundant (58.2%–64.5%). Free essential amino acids in larvae receiving supplementary aloe were higher compared with the control group except for Lys and His. Polyphenol and flavonoid contents and the antioxidant activities of ABTS and DPPH were higher in all treated groups compared with the control group. Although supplementary feeds led to a decreased crude protein content in the treated larvae when compared with the control group, these treatments generally improved the levels of unsaturated fatty acids and antioxidative activity. Therefore, we suggest that among the supplementary foods tested, aloe is a better resource for P. brevitarsis based on crude protein content, free amino acids and other bioactive compounds such as unsaturated fatty acids and antioxidants.