모터 진동과 베어링 쇼크 펄스에 대한 연구

서창희(Chang-Hee Seo),송민수(Min-Soo Song),김석현(Seock-Hyun Kim),양영훈(Young-Hun Yang) 대한기계학회 2020 대한기계학회 춘추학술대회 Vol.2020 No.12

독후활동이 초등학생의 어휘력 향상에 미치는 영향 연구

서창희(SEO, Chang-hee) 한국어문교육학회 2009 어문학교육 Vol.39 No.-

This study begins to assume that reading is the most universal and effective way to improve children's vocabulary competence. In this study it will be identified that reading activities have positive effect on improving vocabulary competence as comparing the group who doesn't do any other activities after reading(A) and with who performs reading activities according to the given program(B). Based on the thought that there's different reading activities appropriate to children by age and gender, I will examine proper reading activities to 3rd grade elementary students, and specify and identify proper reading activities by children's gender as finding and specifying them. The questions of this study are as follows. 1. Is there significant difference between the group who performs reading activities and who doesn't? 2. Which activity has most effect on vocabulary competence of 3rd grade elementary students; writing a book repot(writing); book discussion (listening·speaking); and solving crossword puzzles(play)? 3. Which activity has most influence by children's gender; writing a book repot(writing); book discussion(listening·speaking); and solving crossword puzzles(play)? For this study I divided 66 students of two 3rd-grade classes who attended B elementary school in Sojudong, Yangsan, Kyonsangnamdo into experimental and control group. 33 students of experimental group were also assigned to each of 3 groups, asked to perform each reading activities(writing, listening·speaking, and game), and then examined the improvement of vocabulary competence through pre-and post-test. Totally 10 tests were conducted, and 33 of control group took same book list as experimental group, but were not asked to perform any other activities related to reading activities. Using SPSS program, followings are the results of pre-and post-test with experimental and control group. At first, children's vocabulary competence was improved through reading activities and there was statistically significant difference between two groups(P<.01). Second, it was likely that writing activity was the most effective reading activity in improvement of 3rd grade elementary students and there was statistically significant difference comparing to listening·speaking, and play(p<.01, p<.05). Third, it was showed that play was the most effective reading activity in improvement of 3rd grade male students, and writing was the most for female students. Each of them represented statistically significant difference(p<.05) comparing to other reading activities. Consequently, above study results are summarized as followings. 1. Performing reading activities has more effect on improving vocabulary competence than doing not. 2. It is writing activity that has the most effect on improving vocabulary competence of 3rd grade elementary students. 3. What has most effect on improving vocabulary competence is play for 3rd grade male students, and writing for female students.

Theileria sergenti merozoite의 합성 polypeptide 백신의 면역원성에 관한 연구

백병걸,서창희,김진호,김병수,Baek, Byeong-kirl,Seo, Chang-hee,Kim, Jin-ho,Kim, Byeong-su 대한수의학회 1995 大韓獸醫學會誌 Vol.35 No.1

Western immunoblot analysis of antigen of T sergenti merozoite revealed that the immunodominant proteins of this organism were characterized as the 18KD, 29KD, 34KD, 45KD and 105KD in Korea. The 34KD and 45KD among those immunodominant proteins of the parasite were isolated and their amino acid sequences from the $NH_2$-terminus were determined and synthesized. They respective polypeptides were cationized to enhance their antigenicity, fortified with Freund's adjuvant and tested for immunogenicity in rabbits and cattle. The results obtained were as follows; 1. Theileria sergenti merozoite antigen was shown in 120KD, 100KD, 66KD, 45KD, 34KD and 30KD in western immunoblot using serum of rabbits immunized with 34KD synthetic polypeptide and 70KD, 58KD, 55KD and 45KD using bovine serum. In western immunoblot, 45KD, 34KD and 30KD were recognized by immunized rabbits, and 50KD and 45KD by cattle sera immunized with 45KD synthetic polypeptide, respectively. 2. The ELISA utilizing the synthetic polypeptides demonstrated significant antibody response to the respective peptides. After the 2nd booster injection, an OD of 0.760(preimmunization 0.132) in rabbits and an OD of 0.645(preimmunization 0.488) to 34KD synthetic polypeptide in cattle were observed. In animals immunized with 45KD synthetic polypeptide, after the 2nd booster injection, an OD of 0.640(preimmunization 0.144) in rabbit, and an OD of 0.776 (preimmunization 0.477) in cattle were measured. 3. After the 2nd booster the reciprocal IFA titer was 1:64 in rabbits and 1:512 in cattle immunized with the 34KD synthetic polypeptide. The IFA titre was observed as 1:512 in rabbit and 1:1,024 in cattle in immunized with the 45KD synthetic polypeptide.

간질성 폐질환이 동반된 근침범이 없는 피부근염

이두희 ( Doo Hee Lee ),조영준 ( Young Jun Cho ),송정식 ( Jung Sik Song ),서창희 ( Chang Hee Seo ),이지수 ( Ji Soo Lee ),이수곤 ( Soo Kon Lee ) 대한류마티스학회 1999 대한류마티스학회지 Vol.6 No.1

Amyopathic dermatomyositis is defined by characteristic cutaneous manifestation of dermatomyositis without evidence of muscle involvement. There is no clinical difference between dermatomyositis and amyopathic dermatomyositis. Pulmonary involvement of dermatomyositis is so frequent than aggressive dianostic and therapeutic approach is needed. Early steroid or immunosuppresive treatment in pulmonary involvement of dermatomyositis gets better prognosis. Intravenous immunoglobulin treatment is an effective and safe alternative when the steroid or immunosuppresive treatment is ineffective or intolerable. We are reporting a case of amyopathic dermatomyositis with interstitial lung disease. This patient was improved with intravenous immunoglobulin treatment.

보론강 튜브의 핫스탬핑 공정해석

서오석(Oh Suk Seo),김헌영(Heon Young Kim),박종규(Jong kyu Park),서창희(Chang Hee Suh) 대한기계학회 2011 대한기계학회 춘추학술대회 Vol.2011 No.5

A hot stamping process can be divided into two types, direct process and indirect process, according to the sequence of heating, forming and quenching. In this study, the indirect hot stamping of boron steel tube was adopted to be numerically analyzed. The whole process including forming at room temperature, heating and cooling process with phase transformation was analyzed and simulated by the implicit code DEFORM. From the analyses, it was found that different heat transfer coefficients should be used at different zones of the model in order to ensure the accuracy of the heating and cooling analysis. Therefore, the heat transfer coefficients applied in the analysis were measured at various positions in the tube, e.g., outside, inside, bending area by using heat cartridges. Finally, these coefficients were determined through a correlation of values in the real tests and those from the numerically backward traced analysis. Comparison between experiments and analysis of the final deformed shape and the distribution of the temperature shows good agreement. Hot stamping process consists of forming at the elevated temperature and rapid quenching, which induces phase transformation and results in the press hardening of steel parts. In this study, the hot stamping process of boron steel tube was analyzed by applying different heat transfer coefficients which had been experimentally measured and numerically backward traced.

보론강 튜브의 열전달 계수 측정 및 고온성형 해석

서오석(Oh Suk Seo),김기정(Ki Jung Kim),김헌영(Heon Young Kim),박종규(Jong Kuy Park),서창희(Chang Hee Suh) 한국자동차공학회 2010 한국자동차공학회 부문종합 학술대회 Vol.2010 No.5

A hot press forming process consists of forming at the elevated temperature and rapid quenching, which induces phase transformation and results in the press hardening of steel parts. In this study, the hot press forming process of boron steel tube was analyzed by applying different heat transfer coefficients which had been experimentally measured and numerically backward traced.

내시경적 역행성 담췌관 조영술후 발생하는 고아밀라제혈증의 병인에 산소유리기의 역할

강진경,서창희,박인서,문영명,함기백,정재복,이동기,문희용 대한소화기내시경학회 1994 Clinical Endoscopy Vol.14 No.1

There is growing evidence that oxygen-derived free radicals(OFR's) play a role in the pathogenesis of pancreatic diseases, especially of acute paetcreatitis. Many types of experimental ex vivo and in vitro pancreatitis can be inhibited by superoxide dismutase and catalse. Allopurinol also ameliorates the injury response. While these experiments strongly suggest the involvement of OFR's in some forms of experimental acute pancreatitis, their clinical significance is still unknown. Clinical trials with free radical scavengers or allopurinol are clearly needed to answer the question of free radical initiation of acute or chronic pancreatitis. The aim of this study was to know the role of OFR's on the ERCP-induced hyperamylasemia. Total forty-two patients who underwent ERCP for diagnostic purposes were included and randomly divided into two group6, non-pretreatment group(NP group 19 patients) and pretreatment group(P group, 23 patients pretreated with vitamin E 1000 I.U. and allpurinol 300 mg for 5 days before ERCP orally). 15 ml of venous bloods were drawn in EDTA treated tubes. Serial changes of serum amylase levels(U/ml), washed RBC malonyDdialdehyde levels(MDA, nmol/ml RBC), buffy coats myeloperoxidase activites(MPO, U/ml buffy coats), and plasma superoxide dismutase levels(SOD, U/ml) were measured before, 2 and 24 hours after ERCP, respectively. Serum amylase levels in P group were decreased than NP group, but without statistical significance. The mean RBC MDA levels of P group measuted 2 hr after FRCP were 3.43±1.13, which were significantly decreased than those of NP group(5.27±1.53)(p$lt;0.05). The plasma SOD levels of P group were 17.71 1.8, 20.41±1.3, 19.4±2.2 at before, 2 and 24 hr after FRCP, respectively, which were all significantly decreased than those of NP group(p$lt;0.05). The huffy coats MPO activities were not changed at all in spite of pretreatment. In conclusion, OFR's might be in volved in the pathogenesis of ERCP-induced hyperamylasemia, but do not play a major role. A protective effect of allopurinol and vitamin E could be expected.

Brucella abortus 1119-3균의 OMP항원과 타 병원성 균간의 교차반응에 관한 연구

김병수,서창희,백병걸 한국수의공중보건학회 1998 예방수의학회지 Vol.22 No.1

맥관부종양 안면부종을 주소로한 전신성 루푸스 1례

박해심,서창희,정성택,남동호,권오영 대한알레르기학회 1998 천식 및 알레르기 Vol.18 No.1

Angioedma is a group of disorders with multifactorial etiology but a similar clinical expression, is characterized by swelling of subcutaneous or submucosal tissue. Systemic lupus erythematosus(SLE) is a chronic multi-systemtic disease characterized by inflammation and tissue damage resulting from deposition of auto-antibodies and immune complex. We experienced a case of angioedema which was the first manifestation of SLE in 24-year old female patient. She had suffered from severe facial edema and multiple lymphadenopathy for six months and she also had pleural effusion, positive anti-nuclear and anti-DNA antibody test. Marked decrease of C3 and C4 levels was noted with normal antigenic level, and activity of Cl esterase inhibitor. The angioedema was not improved with anti-hitamine agents and instead disappeared with use of corticosteroid and non-steroidal anti-inflammatory drugs. Complement levels nor- malized after corticosteroid treament. We report a case of SLE which initial manifestation was angioedema.