H-beam 압연 최종패스에서 소재 후단부의 상·하 압하력 변화에 대한 연구

김성기(S. G. Kim),정현석(H. S. Jung),위창현(C. H. Wee),문홍길(H.G. Moon),서경호(K. H. Seo),변상민(S. M. Byon),이영석(Y. S. Lee) 한국소성·가공학회 2023 한국소성가공학회 학술대회 논문집 Vol.2023 No.5

H형강 롤포스 예측 모델 개발

정현석(H. S. Jung),위창현(C. H. Wee),문홍길(H. K. Moon),서경호(K. H. Seo),김태형(T. H. Kim),배병철(B. C. Bae),이영석(Y. S. Lee) 한국소성·가공학회 2023 한국소성가공학회 학술대회 논문집 Vol.2023 No.11

Antimicrobial Susceptibility of Coagulase-Negative Staphylococci Isolated from Bovine Mastitis Between 2003 and 2008 in Korea

( J. M. Kim ),( S. K. Lim ),( J. S. Moon ),( Nam H. M. ),( H. M. Kang ),( G. C. Jang ),( S. H. Wee ),( Y. S. Joo ),( S. C. Jung ) 한국미생물 · 생명공학회 2010 Journal of microbiology and biotechnology Vol.20 No.10

A total of 1,444 coagulase-negative staphylococci (CNS) isolates from bovine mastitic milk samples collected during 2003-2008 in Korea were identified to the species level. Of 14 species identified, S. simulans, S. haemolyticus, and S. sciuri accounted for over 60% of the isolates. All the CNS isolates were tested for susceptibility to eight antimicrobials commonly used in dairy cattle. With a few exceptions, similar resistance patterns were observed among the CNS species: penicillin and ampicillin showed the lowest activity, whereas amikacin, cephalothin, and gentamicin were highly effective. About 39% (557/1,444) of the CNS isolates were pan-susceptible, whereas 12% (175/1,444) showed resistance to four or more antimicrobials tested.

Tunable optofluidic birefringent lens

Wee, D.,Hwang, S. H.,Song, Y. S.,Youn, J. R. The Royal Society of Chemistry 2016 Soft matter Vol.12 No.17

<P>An optofluidic birefringent lens is demonstrated using hydrodynamic liquid-liquid (L-2) interfaces in a microchannel. The L-2 lens comprises a nematic liquid crystal (NLC) phase and an optically isotropic phase for the main stream and the surrounding sub-stream, respectively. When the optofluidic device is subjected to a sufficiently strong electric field perpendicular to the flow direction, NLCs are allowed to orient along the external field rather than the flow direction overcoming fluidic viscous stress. The characteristics of the optofluidic birefringence lens are investigated by experimental and numerical analyses. The difference between the refractive indices of the main stream and the sub-stream changes according to the polarization direction of incident light, which determines the optical behaviour of the lens. The incidence of s-polarized light leads to a short focal point, while p-polarized light has a relatively long focal distance from the same L-2 interface. The curvatures and focal lengths of the lens are successfully evaluated by a hydrodynamic theory of NLCs and a simple ray-tracing model.</P>

Effect of Ni~3Al Intermetallic Compound Inclusion on Ni Grain Growth Inhibition in MCFC Porous Ni-Base Anode

Kim, Y.-S 한국화학공학회 1999 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.37 No.1

L-ascorbic acid와 α-tocophero1이 돼지정액 성상과 체외수정란의 배발달율에 미치는 영향

박희진,김은국,위갑인,강만종,김광현,김재홍,문승주 全南大學校 農業科學技術硏究所 2001 農業科學技術硏究 Vol.36 No.-

The objective of this studys were to investigate the effect of α-tocopherol and L-ascorbic acid supplement on the boar semen characteristics and in vitro development rate of porcine oocytes. Sperm viability rate was significantly higher in α-tocopherol supplement than in control(66.6%) after 72hr of storage(P<0.05). Sperm motility was increased in treatment(80%, 93.3%, 85%) than in control(73.3%) at 12h of storage(P<0.05). Following insemination with 60h of store, morular and blastocyst on in vitro development resulted in significantly higher than control(P<0.05). After 72h of semen storage L-ascorbic addition also increased the sperm viability rate(P<0.05). Treatment as sperm motility was significantly higher than control in 72h of store(60% vs 66.6%, p<0.05). Following insemination with 60h of store treated porcine oocytes on in vitro development was increased more than control(56.8%), 59.9%, 62.8% vs 45.1%, P<0.05). Morular and blastocyst on in vitro development resulted in significantly higher than control(27.1%, 30.0%, 33.1% vs 20.0%, P<0.05). The results from this experiment indicated that α-tocopherol and L-ascorbic acid supplementation, for viability and motility in porcine semen, increased delay storing time of semen and in vitro development rate following insemination.

상안검거근의 절제에 의한 안검하수의 교정에 대한 임상적고찰

마홍수,조문제,조해석,위성신,최오규 大韓成形外科學會 1986 Archives of Plastic Surgery Vol.13 No.2

The great number of operations described over the past century for correcting blepharoptosis is indicative of the difficulty of achieving a standardized technique. It will be consistently effective condition that has so many variations of degree and individual operative technique is so important. To obtain the best surgical results in blapharoptosis, it is necessary to select the appropriate operation for each case according to levator function, degree of ptosis, its etiology and the others. In generally, if the levator function is poor or abscent, sling of the upper lid to frontalis muscle is recommended and if levator function is good, resection of the levator is the treatment of choice. But some authors (Blaskovics & Jaensch) believe that resection of the levator will give an excellent result even when little preoperative levator action is evident. Authors have experienced 25 patients (27 eyes) of the moderate to severe degree of blepharoptosis who have received the levator resection, from January 1980 to January 1984 and could have done follow up studies for at least 6 months. The results were obtained as follows; 1. In most cases, the patients were satisfied except 6 cases complicated; one case of entropion and five cases of undercorrection. 2. Even if levator function was poor (below 2 mm, 7 cases), good surgical results have been obtained by resection of levator(21-25 mm or above).

제왕절개술의 임상적 고찰

김철,위성년,문은주,이학림,임수현,이세용 대한산부인과학회 1991 Obstetrics & Gynecology Science Vol.34 No.2

저자는 만 6년간(1983년 1월 1일~1988년 12월 31일) 부산 성분도병원 산부인과에 입원하였던 산모 10,162예 중 제왕절개술을 시행하였던 1,801예에 대한 임상 통계학적 관찰을 하였던 바, 다음과 같은 결론을 얻었다. 1. 제절의 빈도는 총 분만 산모의 17.7%이었고, 매년 증가하다가 최근 2년(1987년, 1988년)동안은 약간 감소하였다. 2. 연령별 분포는 26~30세군이 전체의 63.7%로 가장 많았고, 21~25세군이 21.4%, 31~35세군이 11.6%의 빈도를 나타내었으며 평균연령은 27.7세이었다. 3. 임신주수별 분포에서 임신 39~40주군이 55.4%로 가장 많았고, 임신 39~42주사이에 76.8%로서 높은 빈도를 보였다. 4. 1차제절의 적응증은 아두골반 불균형이 전체의 47.7%로서 가장 높은 빈도이었고, 다음이 골반위, 태아절박증, 전치태반 및 자궁수축부전의 순위이었다. 미경산부와 경산부로 분류하여 관찰하였을 때, 미경산부의 제절 적응증의 빈도 순위는 1차제절과 유사하였으나, 경산부에서는 골반위가 가장 높은 빈도를 보였고, 다음이 아두골반 불균형, 전치태반 등의 순위로 나타났다. 반복제절의 적응증은 선택적 반복제절이 96.6%로 가장 많았고, 다음이 골반위, 전치태반의 순위로 나타났다. 5. 제절술식은 자궁협부횡절개술이 98.1%로 거의 대부분의 경우 시행되었고, 자궁체부종절개술은 1.6%이었다. 제왕절개 자궁적출술은 6예(0.3%)에서 시행되었고, 이의 적응증은 전치태반으로 인한 심한 출혈, 전치태반이 있었다. 6. 제절과 병행된 수술은 난관결찰술이 21.9%로 가장 많았고, 다음이 충수돌기절제술 9.8% 및 자궁부속기절제술 0.5%의 빈도를 보였다. 7. 제절시 실혈량은 500~999 ml군이 64.4%로 가장 많았고, 다음으로 1000~1499 ml군이 33.4%이었다. 마취방법은 전신마취가 79.0%, 척수마취가 21.0%에서 시행되었다. 8. 모성 이환율은 전체의 6.8%이었고, 이 중 산욕열이 3.1%, 창상감염이 2.2%의 빈도를 보였다. 빈혈정도와 모성 이환율의 관계에서 입원시 혈색소치 10 mg%이하군(22.1%)에서 모성 이환율은 10.7%와 10 mg 이상군에서는 13.8%의 이환율을 나타내어서, 빈혈정도가 심한 경우 오히려 모성 이환율이 감소하였다. 9. 신생아 평균 체중은 3.28 kg이었으며, 3000~3499 gm군이 전체의 44.0%로 가장 높은 빈도를 나타내었다. 10. 주산기사망율은 0.49%이었고, 사산의 원인은 원인불명, 태반조기박리이었다. 11. 모성사망은 없었다. Clinical analysis was carried out retrospectively, based on the charts of 1801 cases of cesarean section out of 10,162 deliveries from January, 1983 to December 1988 at the St.Benedict hospital, Busan, Korea. The results were as follows. 1. There were 10,162 deliveries with 1801 cases of Cesarean section, giving an incidence of 17.7%, The primary Cesarean section rate was 11.4% and repeat Cesarean section rate was 3.3%. 2. According to the age distribution 63.7% of total cases were between 26~30 year old group, 21.4% between 21~25 year old group and 18.4% between 31~35 year old group. The mean age was 27.7 year old. 3. The greatest portion(55.4%) of the cases was done between 39~40 gestational weeks group and 76.8% of the cases was done between 39~42 weeks. 4. Indication of primary Cesarean section were C.P.D.(47.7%), breech presentation(25.9%), fetal distress(5.7%), placenta previa(4.0%) and miscellaneous. In nullipara, indications were similar to above in order. But in multipara, breech presentation was the highest incidence, 43.3% and C.P.D., placenta previa, fetal distress in order. 5. In the types of operation, lower cervical transverse incision was the most common(98.1%), classic type was 1.6% in rate and Cesarean hysterectomy was 0.3% in rate. The most common indication of Cesarean hysterectomy was uncontrolled bleeding from placenta previa. 6. In the incidental operation during Cesarean section, the tubal ligation was the most common(21.9%) and then Incidental appendectomy was 9.8% and salpingoophorectomy was 0.4% in rate. 7. 64.4% of the cases belonged to 500~900 ml blood loss group, and 1,000~1,499 blood loss group 33.4%, In the type of anesthesia, general anesthesia was performed 79.0% of total cases and spinal anesthesia was done 21.9%. 8. The rate of maternal morbidity was 6.8%, of which puerperal fever was 3.1%, and wound infection was 2.2% in rate. 9. In the relation of Hb. level and maternal morbidity, Hb. 10 gm% or less group revealed 10.7% of maternal morbidity and Hb. 10 gm% or over group revealed 13.8% of maternal morbidity. 10. The mean weight of the new bron baby was 3.29kg. The greatest portin(44.0%) belonged to 3,000~3,499 gm group. 11. Pernatal mortality was 0.49% and the most comon cause of neonatal death was abruptio placenta. 12.There was no materal death.

반흔성 하안검 외반증에 대한 Composite Graft의 치험예

함기선,위성신,조해석,임풍,조문제 大韓成形外科學會 1980 Archives of Plastic Surgery Vol.7 No.1

Eyelid ectropion was the most common late sequelae encountered in our experiences following trauma or thermal burn around the eyelid. Those deformities must be corrected early to preserve visual acuity. Split-skin graft to the upper eyelid and full thickness skin graft to the lower lid have been emphasized to the most reliable methods for correction of the cicatrical ectropion. However, there is tendency toward contracture under these grafts, and the ectropion recur and reoperation or additional sugery required. To solve these problems, we have corrected the cicatrical ectropion with free composite graft of skin and cartilage from the concha of the auricle. The results of these composite grafts are favorable without recurrence.

Highly pathogenic avian influenza in magpies (Pica pica sericea) in South Korea.

Kwon, Y-K,Joh, S-J,Kim, M-C,Lee, Y-J,Choi, J-G,Lee, E-K,Wee, S-H,Sung, H-W,Kwon, J-H,Kang, M-I,Kim, J-H [Wildlife Disease Association] 2005 Journal of wildlife diseases Vol.41 No.3

<P>Highly pathogenic avian influenza (HPAI) is an extremely infectious, systemic viral disease of birds that produces high mortality and morbidity. HPAI was diagnosed in the three dead magpies (Pica pica sericea) submitted to the National Veterinary Research and Quarantine Service. At necropsy, the prominent lesions were multifocal or coalescing necrosis of the pancreas with enlargement of the livers and spleens. Microscopically, there were severely necrotizing pancreatitis and lymphocytic meningoencephalitis. Influenza viral antigen was also detected in areas closely associated with histologic lesions. Avian influenza virus was isolated from cecal tonsils and feces of the magpies. The isolated virus was identified as a highly pathogenic H5N1, with hemagglutinin proteolytic cleavage site deduced amino acid sequence of QREKRKKR/GLFGAIAG. To determine the pathogenicity of the isolate, eight 6-wk-old specific-pathogen-free chickens were inoculated intravenously with the virus, and all birds died within 24 hr after inoculation. This is the first report of HPAI in magpies.</P>