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Bolitobius princeps (Sharp) (Coleoptera: Staphylinidae: Tachyporinae) New to Korea
정우진,안기정,Jeong, Woo-Jin,Ahn, Kee-Jeong Korean Society of Applied Entomology 2019 한국응용곤충학회지 Vol.58 No.2
갈색어깨무늬뾰족반날개[Bolitobius princeps (Sharp)]를 한반도에서 처음으로 보고한다. 외형사진과 식별형질의 그림을 제시한다. Bolitobius princeps (Sharp) is identified for the first time in the Korean Peninsula. Illustrations of habitus and diagnostic characters are provided.
정우진,안기정,Jeong, Woo-Jin,Ahn, Kee-Jeong Korean Society of Applied Entomology 2018 한국응용곤충학회지 Vol.57 No.1
붉은뾰족반날개[Tachinus (Tachinus) javanus Cameron]를 한반도에서 처음으로 보고한다. 기재문, 외형사진과 식별형질의 그림 및 북방뾰족반날개속의 검색표를제시한다. 큰갈색뾰족반날개[Tachinus (Tachinus) yezoensis Li]의 수컷형질을 추가하여 재기재한다. Tachinus (Tachinus) javanus Cameron is identified for the first time in the Korean Peninsula. Description, illustrations of habitus and diagnostic characters, and a key to the known species of Korean Tachinus Gravenhorst are provided. Tachinus (Tachinus) yezoensis Li is redescribed with male characteristics.
정우진,김성원,Jeong, U-Jin,Kim, Seong-Won 대한기계학회 2000 大韓機械學會論文集A Vol.24 No.8
This research has been performed to reveal the hysteresis phenomena of the hunting motion in a railway passenger car having a bolster. Since linear analysis can not explain them, bifurcation analysis is used to predict its outbreak velocities in this paper. However bifurcation analysis is attended with huge computing time, thus this research proposes more effective numerical algorithm to reduce it than previous researches. Stability of periodic solution is obtained by adapting of Floquet theory while stability of equilibrium solutions is obtained by eigen-value analysis. As a result, linear and nonlinear critical speed are acquired. Full scale roller rig test is carried out for the validation of the numerical result. Finally, it is certified that there are many similarities between numerical and test results.
정우진,Jeong, U-Jin 대한타이어공업협회 2005 타이어 Vol.225 No.-
각국의 상이한 안전기준은 자동차산업의 국제적 무역에 큰 걸림돌이 되고 있다. 이에 따라 UN 산하의 자동차 안전기준 국제협의기구(WP.29)를 중심으로 세계 각국은 안전기준의 국제 표준화 조화를 위한 노력을 추진하고 있다.
구부러진 눈꺼풀판을 가진 노인성 아래눈꺼풀속말림의 임상적 특징
정우진,허문정,안희배,Woo Jin Jeong,Mun Chong Hur,Hee Bae Ahn 대한안과학회 2011 대한안과학회지 Vol.52 No.7
Purpose: To report the clinical features and surgical results for lower lid entropion with kinked tarsus compared with entropion with weakened capsulopalpebral fascia. Methods: From March 2008 to December 2009, 20 patients (24 eyes) with lower lid entropion were examined. The patients were divided into the aggravated entropion with kinked tarsus group or the weakened capsulopalpebral fascia group based on the height of tarsus, the shapes of the lower lid and tarsus, and conjunctiva changes. For treatment of entropion in the kinked tarsus group, full thickness tarsotomy with rotatory suture (tarsal fracture operation) was performed, and in the weakened CPF group, a CPF tight procedure was performed. The results of the operations were retrospectively evaluated. Results: The mean age of the patients with entropion in the kinked tarsus group (15 cases) was 66.7 ± 11.4 years, and the mean age of the patients with entropion in the weakened CPF group (9 cases) was 67.2 ± 6.2 years. The height of the lower lid tarsus of each group was 3.80 ± 0.39 mm and 5.20 ± 0.30 mm, respectively. Except for one case of recurrence after tarsal fracture operation in the kinked tarsus group and reoperation with CPF tightening, there were no significant complications or recurrence in either group. Conclusions: Entropion with kinked tarsus was more common than entropion with weakened CPF in the present study. In addition, surgical treatment based on the shape and cause of entropion showed good results. J Korean Ophthalmol Soc 2011;52(7):777-782