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환경영향을 고려한 Spot Weld Bonding 재료와 강도 평가에 관한 연구
박명과,구본용 한국항공대학교 1997 論文集 Vol.35 No.-
The strength test to obtain characteristics was experimentally examined by using a number of specimens. Weld bonding can be applied a combination method of spot welding and adhesive to have more advantages than those. Weld boding has many merits that enlarge the fatigue strength of spot welding and also improve the creep of adhesive But it has not been proved well in the various environmental conditions. Therefore the weld bonding test for tensile strength and fatigue strength are presented under such various conditions as temperature and humidity.
윤의중,구본석,정인수,정인찬,이영훈,신혜숙 한서대학교 산학협력연구원 부설 환경연구소 2000 환경연구소 논문집 Vol.3 No.-
Gas phase Ozonolyses have been examined with particular emphasis on the question whether are produced. The following results were obtained. 1) In contrast to previous reports, Ozonolyses of the terpense β-pinene and sabinene provided the corresponding ozonides as minor products. Major products were the corresponding ketones, respectively. In addition, β-pinene afforded the lactones, while sabinene gave the lactones. 2) Ozonolyses of 1, 2-dimethylcyclopentene provided the corresponding ozonide as a minor and diketone as the major product, along with small proportions, each, of nine additional products. 3) Ozone treatment of diketone provided small amounts of Ozonide in a hitherto unprecedented reaction of diketiones with ozone.
김윤성,구본길,차종식,박장규,이영 충남대학교 의과대학 지역사회의학연구소 1984 충남의대잡지 Vol.11 No.1
Mondor's disease has been regarded as an obliterative phlebitis usually affecting superficial vein of the chest wall. It is characteristic that the cord-like thrombosed vein which is red and tender at first changes into painless fibrous band. In the past, it was confused with lymphatic spread of carcinoma but it was confirmed that it was benign and related with the systemic diseases or cancer. The authors observed a 57-year-old female with Mondor's disease. 15 days ago, she notified the cord-like lesion on the right chest well, from right axillar fold to right iliac crest. 1. month later, the skin lesion much improved without special treatment.
Al 5052-H32 판재의 점용접조건에 따른 강도 및 피로 파괴에 관한 연구
박명과,이의성,구본용 한국항공대학교 1996 論文集 Vol.34 No.-
The spot welding conditions followed that welding force was 250, 300, 350kgf, welding currents were 18, 21,24,27,30kA, and wewelding current range increased. The failure modes of tensileshear test were observed on shear, button, and tear failure mode. The shear, botton, tear failure were observed at low, medium, high welding lding time was 6cycles. The micro-structure of welded zone was made of nugget, columnar, and HAZ. Nugget diameter increased as the welding current range increased. Nugget thickness decreased as the current. The opimum welding condition was choosed for welding force 250kgf and welding current 24kA at Al5052-H32 plate of 1 mm thickness. The fatigue behavior was examined by a bending fatigue machine. The fatigue limit was 107.8MPa. The crack propagation rates were 1.033×10-7(??)2.11 at spot welded zone and 1.752×10-7(??)2.08 at base metal.
( Ji Young Jung ),( Myung Suk Choi ),( Ji Su Kim ),( Mi Jin Jeong ),( Young Wun Kim ),( Byeong Tae Woon ),( Jin Ki Yeo ),( Han Na Sin ),( Young Bon Goo ),( Keun Ok Ryu ),( Chandrakant S. Karigar ),( J 한국임학회 2010 한국산림과학회지 Vol.99 No.5
Enzymatic hydrolysate from non pre-treated biomass of yellow poplar (Liriodendron tulipifera) was prepared and used as resource for bioethanol production. Fresh branch (1 year old) of yellow poplar biomass was found to be a good resource for achieving high saccharification yields and bioethanol production. Chemical composition of yellow poplar varied significantly depending upon age of tree. Cellulose content in fresh branch and log (12 years old) of yellow poplar was 44.7 and 46.7% respectively. Enzymatic hydrolysis of raw biomass was carried out with commercial enzymes. Fresh branch of yellow poplar hydrolyzed more easily than log of yellow poplar tree. After 72 h of enzyme treatment the glucose concentration from Fresh branch of yellow poplar was 1.46 g/L and for the same treatment period log of yellow poplar produced 1.23 g/L of glucose. Saccharomyces cerevisiae KCTC 7296 fermented the enzyme hydrolysate to ethanol, however ethanol production was similar (~1.4 g/L) from both fresh branch and log yellow poplar hydrolysates after 96 h.
Jung, Ji-Young,Choi, Myung-Suk,Kim, Ji-Su,Jeong, Mi-Jin,Kim, Young-Wun,Woon, Byeng-Tae,Yeo, Jin-Ki,Shin, Han-Na,Goo, Young-Bon,Ryu, Keun-Ok,Karigar, Chandrakant S.,Yang, Jae-Kyung Korean Society of Forest Science 2010 한국산림과학회지 Vol.99 No.5
Enzymatic hydrolysate from non pre-treated biomass of yellow poplar (Liriodendron tulipifera) was prepared and used as resource for bioethanol production. Fresh branch (1 year old) of yellow poplar biomass was found to be a good resource for achieving high saccharification yields and bioethanol production. Chemical composition of yellow poplar varied significantly depending upon age of tree. Cellulose content in fresh branch and log (12 years old) of yellow poplar was 44.7 and 46.7% respectively. Enzymatic hydrolysis of raw biomass was carried out with commercial enzymes. Fresh branch of yellow poplar hydrolyzed more easily than log of yellow poplar tree. After 72 h of enzyme treatment the glucose concentration from Fresh branch of yellow poplar was 1.46 g/L and for the same treatment period log of yellow poplar produced 1.23 g/L of glucose. Saccharomyces cerevisiae KCTC 7296 fermented the enzyme hydrolysate to ethanol, however ethanol production was similar (~1.4 g/L) from both fresh branch and log yellow poplar hydrolysates after 96 h.
( Bon Wook Goo ),( Mi Young Lee ) 대한물리치료학회 2021 대한물리치료학회지 Vol.33 No.1
Purpose: This study examined the effects of the type of video contents used for action observations on the ability to control posture. Methods: The participants were 48 healthy adults. The two hands of the participants were crossed on both shoulders, and the other foot was placed in a straight line in front of the target to allow them to watch a video of the monitor. The videos were presented in random order with three video contents (natural, stable balance posture, and unstable balance posture) consisting of 30 seconds each. A 15-second resting time was given between each video. During action observation using various video content forms, the posture control ability was measured using a TekScan MetScan® system. Results: The results revealed statistically significant differences in the area of movement and the distance by COP and distance by the type of action-observation videos, and the distance by the anteroposterior and mediolateral sides (p<0.05). The stable balance posture and unstable balance posture video showed significant differences in the distance by the COP, anteroposterior, and mediolateral distance. (p<0.05) Conclusion: This study suggests that choosing the contents of the videos is important during action-observation training, and action-observation training can help improve postural control.
Goo, In Bon,Lim, Sang Gu,Gil, Hyun Woo,Park, In-Seok,Choi, Cheol Young The Korean Society of Marine Life Science 2018 한국해양생명과학회지 Vol.3 No.1
This study investigated cytogenetic and hematological and histological characteristics between diploid and spontaneous triploid on Cyprinidae (Crucian carp, Carassius auratus; crucian carp, C. cuvieri and common carp, Cyprinus carpio) in four major rivers of Korea. In our results, DNA contents of triploid Cyprinidae were 50% more than those of diploid Cyprinidae. Also, erythrocyte size of triploid Cyprinidae was 50% larger than those of diploid Cyprinidae. In all sampling rivers, sex ratios of C. auratus were biased to female, and especially, triploid groups of C. auratus were all female groups (p<0.05). In principle, sex ratios of C. cuvieri and common carp were equivalent between male and female.
Android & iOS 기반 스마트폰의 디지털 증거 수집 및 분석
구본민(Bon-Min Goo),김주영(Ju-Young Kim),이태림(Tae-Rim Lee),신상욱(Sang Uk Shin) 한국정보보호학회 2011 정보보호학회논문지 Vol.21 No.1
최근 스마트폰의 등장으로 모바일 서비스가 다양한 형태로 성장하고 있다. 각 회사들은 Window Mobile. Android. iOS 등 다양한 운영체제를 탑재하여 출시하고 있지만, 현재 가장 보급이 원활하게 이루어지는 스마트폰은 Android와 iOS를 탑재한 스마트폰이 활발히 보급되고 있다. 이에 따라 스마트폰의 다양한 기능을 이용하여 각종 범죄로 연결될 수 있으며, 다앙한 증거들이 남아 있을 수 있다. 본 논문에서는 디지털 포렌식(Forensic)의 관점에 따라 스마트폰에서 수집될 수 시는 증거 데이터의 위치를 파악하고, 도구를 설계해 수집된 데이터를 분석하였다. 이로 인해, 범죄사용으로 인한 스마트폰의 증거들을 수집할 때 시간을 단축시킬 수 있는 기대효과를 가져본다. As recent emergence of smart phones, mobile services are growing in various forms. Many companies released smart phones of various operating systems such as Window Mobile, Android and iOS. Currently, most popular smart phone operating systems are Android and iOS. Due to the various features of these smart phone, they can be employed to various crimes. From the point of view of digital forensics, this paper analyzes the evidence data which needs to be collected in the smart phone, and implements the evidence analysis tool. By using this tool, it can reduce the time and effort for collecting and analyzing the evidence of the smart phone.