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STD 11 강의 오스테나이트화 온도에 따른 제 특성의 정량 분석
김조은,주용후,장우양,Kim, J.E.,Ju, Y.H.,Jang, W.Y. 한국열처리공학회 2017 熱處理工學會誌 Vol.30 No.5
The effect of austenitizing temperature on the degree of carbides re-solutionizing, mean graine size, hardness and the volume fraction of retaind austenite ($V_{\gamma}$) etc., has been studied by means of metallography, X-ray diffractometry and hardness measurement in STD 11 tool steel. As austenitizing temperature increases, the amount of alloying elements which is re-dissolved into matrix increases, resulting in increase of $V_{\gamma}$, due to the chemical stabilization of austenite. The Vickers hardness value decreases with increasing austenitizing temperature, which is attributed to grain size as well the volume fractions of $V_{\gamma}$ and carbides. Theoretical diffraction intensity of (200) ${\alpha}^{\prime}$, (211) ${\alpha}^{\prime}$ (200) ${\gamma}$ and (220) ${\gamma}$ peaks obtained by $CuK_{\alpha}$ chracteristics X-ray (${\lambda}=0.15429nm$) was calculated, and quantitative analysis of $V_{\gamma}$ could be carried out by X-ray diffraction method. The resultant value is well coincided with the value obtained by image analysis method. When the quenched specimen is tempered above $200{\sim}400^{\circ}C$ for 30 min, the transition carbides i.e., MC and $M_2C$ in the size of about 20 nm begin to precipitate at $300^{\circ}C$.
개인정보의 제3자 제공시 정보보호 관련 법상 책임에 관한 연구/OPEN API 이용 핀테크 기업을 중심으로
김조은,김인석,Kim, Jo-eun,Kim, In-seok 한국전자거래학회 2017 한국전자거래학회지 Vol.22 No.4
금융회사, 공공기관 등이 보유하고 있는 다양한 정보를 오픈 플랫폼을 통해 적극적으로 핀테크 기업에게 개방하고 있는 추세다. 본 연구에서는 개인정보보호법, 정보통신망 이용 및 촉진에 관한 법률 등 정보보호 관련 법상 개인정보처리의 "제3자 제공"과 "위탁"의 개념 차이를 살펴볼 것이다. 그리고 "위탁"과 달리 핀테크 기업처럼 "제3자 제공", 즉 일반적으로 "제휴" 관계인 경우 제공하는 기업의 법적 의무가 지나치게 완화되어 있는데 반해 정보유출 위험은 상대적으로 높기 때문에 현실에 맞는 정보보호 관련 법제도 정비를 제언하고자 한다. 또한 "제3자 제공"시 제공받는 기업이 스스로 정보보호 수준을 높일 수 있도록 정보보호 자가진단 체크리스트를 제시한다. 이를 통해 금융회사 오픈 플랫폼을 활용하는 31개 핀테크 기업을 진단한 결과, 수탁자보다 정보보호 수준이 상대적으로 미흡하다는 것을 확인하였다. 금융회사와 "제3자 제공" 관계인 핀테크 기업의 정보보호 수준이 높아질 수 있도록 체크 리스트의 적극적인 활용을 제언한다. It is actively opening the market to fintech companies through open platforms, such as financial institutions and public institutions. In this thesis, we will look at the conceptual differences between the "provision of third-party information" and "entrustment" of information protection related laws, such as the Personal Information Protection Act, the Act on Promotion of Information and Communications Network Utilization and Data Protection Etc (Network Utilization Protection Act). In addition, the legal obligation to provide information regarding the legal rights of information is considered to be relevant, whereas the legal obligation of the private information provided by the company is excessively mitigated, whereas the legal obligation of the company to provide information is excessively mitigated. In addition, I suggest self-diagnosis checklist to help fintech companies improve their privacy levels. It was found that the level of information protection was relatively insufficient compared to the consignees based on the results of a survey conducted for 31 fintech companies. Aggressive use of the checklist is suggested to raise the level of information protection for those companies.
사료 내 복합생균제 첨가가 이유자돈의 사양성적, 영양소 소화율, 혈액성상, 분내 유해가스 및 분 중 미생물에 미치는 영향
김동우(Dong-Woo Kim),최요한(Yo-Han Choi),김조은(Jo-Eun Kim),조은석(Eun Seok Cho),정현정(Hyun-Jung Jung),오승민(Seung-Min Oh),김정대(Jeong-Dae Kim),김진수(Jin-Soo Kim) 한국산학기술학회 2020 한국산학기술학회논문지 Vol.21 No.5
본 연구는 생균제의 첨가가 이유자돈의 사양성적, 영양소 소화율, 혈액성상, 분 내 유해가스 및 분 중 미생물에 미치는 영향을 구명하기 위해 수행하였다. 본 실험을 위해 총 234두의 이유자돈(Landrace×Yorkshire× Duroc, 6.14±0.78kg)을 공시하였으며, 개시체중에 기반하여 3처리 6반복, 반복당 13두를 완전임의 배치하였다. 실험은 Phase Ⅰ(0~14일), PhaseⅡ(15~28일) 총 4주간 조사하였다. 실험 처리구는 T1(basal diet), T2(basal diet+0.13% complex probiotics) 및 T3(basal diet+0.25% complex probiotics)로 구성되었으며, 복합생균제는 Bacillus subtilis 1.0×106 CFU/g, Enterococcus faecium 1.0×10<SUP>6</SUP> CFU/g, Saccharomyces cerevisiae 1.0×10<SUP>6</SUP> CFU/g, Bacillus licheniformis 3.0×10<SUP>8</SUP> CFU/g 및 Bacillus polyfermenticus 3.0×10<SUP>8</SUP> CFU/g를 함유하였다. 사양성적은 PhaseⅡ에서 T3 첨가구에서 일당증체량 및 일일사료섭취량이 유의적으로 높게 나타났다(p <0.05). 전기간에서는 PhaseⅡ와 동일한 결과가 나타났다. 영양소 소화율은 PhaseⅠ에서 단백질 소화율이 T3 첨가구에서 유의적으로 높게 나타났으며 (p <0.05), PhaseⅡ에서 건물 소화율 및 에너지 소화율이 T3 첨가구에서 유의적으로 높게 나타났다(p <0.05). 혈액성상에서는 PhaseⅠ과 PhaseⅡ에서 모든 처리구간 유의적인 차이가 나타나지 않았다. 분내 유해가스에서는 PhaseⅡ에서 NH₃가 T3 첨가구에서 유의적으로 낮게 나타났다(p <0.05). 분 중 미생물에서는 PhaseⅠ과 PhaseⅡ에서 Clostridium spp.이 T3 첨가구에서 유의적으로 낮게 나타났다(p <0.05). 결론적으로 이유자돈 사료 내 복합생균제 첨가는 사양성적, 영양소 소화율, 혈액성상, 분 내 유해가스 및 분 중 미생물을 개선할 수 있다고 사료된다. This study was undertaken to determine the effects of diet supplementation with complex probiotics (CPB), on growth performance, nutrient digestibility, blood metabolites, noxious gas, and fecal microflora in weaning pigs. On the basis of body weight, a total of 234 weaned pigs (Landrace×Yorkshire×Duroc, 6.14±0.78kg) were randomly allotted to 3 treatments and 6 replicates (13 pigs per pen). The experimental diets were fed in a meal form for 28 days (days 0-14, PhaseⅠ, and days 15-28, PhaseⅡ). The dietary treatment groups were as follows: T1 (basal diet), T2 (T1+0.13% CPB) and T3 (T1+0.25% CPB). The CPB supplement contained Bacillus subtilis 1.0×10<SUP>6</SUP> CFU/g, Enterococcus faecium 1.0×10<SUP>6</SUP> CFU/g, Saccharomyces cerevisiae 1.0×106 CFU/g, Bacillus licheniformis 3.0×10<SUP>8</SUP> CFU/g, and Bacillus polyfermenticus 3.0×10<SUP>8</SUP> CFU/g. Pigs fed the T3 diet showed an increase (p<0.05) in the overall average daily gain and average daily feed intake, increased (p<0.05) crude protein digestibility in PhaseⅠ, and greater (p<0.05) dry matter and gross energy digestibility in PhaseⅡ. Supplementation of CPB had no effect on the blood profile. Furthermore, pigs fed the T3 diet had lower (p<0.05) NH₃ emission and overall count of fecal Clostridium spp. In conclusion, we believe that CPB supplementation has a beneficial effect on growth performance, nutrient digestibility, noxious gas, and fecal microflora in weaning pigs.
모돈 사료 내 만삼추출분말의 급여가 번식성적에 미치는 영향
김기현(Ki-Hyun Kim),김광식(Kwang-Sik Kim),김조은(Jo-Eun Kim),설국환(KuK-Hwan Seol),정현정(Hyun-Jung Jung),이성대(Sung-Dae Lee),사수진(Soo-Jin Sa),정영훈(Young-Hun Jung),박준철(Jun-Cheol Park),김영화(Young-Hwa Kim) 충남대학교 농업과학연구소 2014 농업과학연구 Vol.41 No.3
The present study was conducted to investigate the effects of dietary supplementation of Codonopsis pilosula extract powder (CEP) on the reproductive performance in sows. A total of 20 pregnant sows were randomly assigned to two dietary treatments, which was given a corn and soybean meal-based diets containing 0 or 5 g/kg of the CEP from 40 days prepartum to weaning (25 days postpartum). The serum immunoglobulin G (IgG) concentration of sow (p<0.01) and piglets (p<0.05) was significantly increased by the feeding of CEP. And we also demonstrated that the coefficient of correlation between the colostrum and serum indicates a significant positive correlation on IgG. The stillbirth of sows and mortality rate during suckling periods were slightly lower in CEP feeding group than control, but there is no significant difference. In conclusion, our results suggest that the dietary supplementation of CEP increases the humoral immunity in both of sows and piglets, and it might contribute to improve the reproductive performance of sows. Further, additory studies are necessary on the immunomodulatory mechanism of CEP components.
김기현(Ki-Hyun Kim),김광식(Kwang-Sik Kim),김조은(Jo-Eun Kim),설국환(Kuk-Hwan Seol),김영화(Young-Hwa Kim) 충남대학교 농업과학연구소 2015 농업과학연구 Vol.42 No.4
This study was performed to investigate the opinions of various related-industries on ban of antibiotics growth promoters (AGPs) in commercial mixed feed. The answers on a total of 21 questions were summarized by response number and percentage. 93% of those surveyed were in agreement of a ban of dietary AGPs. The agreement reasons were the livestock safety (61.5%), the reduction of antibiotic use (23.1%), and decrease of antibiotic-resistant bacteria (11.5%). The negative effects expected by the ban of AGPs were poor growth performance (44.2%), elevated disease emergence (31.4%), increasing the feed cost (18.6%), and quality degradation of livestock (5.8%). As the efficient plans for decline of AGPs use, the feeding environment improvement was the highest with 43%, and farmer training and the consolidation inspection of residual substance on antibiotics in livestock product was 27.9% and 22.1%, respectively. 46.5% of respondent are considering the modification of feed spec and 39.5% of those surveyed have staged a modified feed spec. In conclusion, livestock related-industries approve a ban of AGPs, and they assert that the policy support, improvement of management and environment in the farm, providing technology from related-industries are multiply essential for a stable settlement of a ban policy of AGPs.
배합사료 내 항생제 사용금지 이후 양돈농가 생산성적 변화 조사
김기현(Ki-Hyun Kim),조은석(Eun-Seok Cho),김광식(Kwang-Sik Kim),김조은(Jo-Eun Kim),설국환(Kuk-Hwan Seol),박준철(Jun-Cheol Park),김영화(Young-Hwa Kim) 충남대학교 농업과학연구소 2015 농업과학연구 Vol.42 No.3
This study was conducted to investigate the changes in the pig productivity after ban of antibiotics growth promoter in commercial pig farms. A total 74 pig farms that herd size is from less than 100 sows to more than 500 sows were selected for survey. Changes of pig productivity before/after ban of antibiotics were analyzed by comparing with our survey results and report of KPPA (Korean Pork Producers Association, 2013). In the results, no difference on pig productivity was observed by herd size among our survey farms. Live born piglets have been raised as time passes since 2003, and then it reach to 10.6 head per sow in 2012. The numbers of weaning piglet tended to increase, but sow turnover ratio was found to be a tendency to decrease after ban of antibiotics in our survey results. There was no effect of using antibiotics on mortality of pre- and post- weaning. Marketing per sow per year (MSY) does not be improved because the post-weaning mortality was maintained at a high level, despite live pig born and weaning piglet have increased after 2003. In conclusion, a ban of antibiotics growth promoter does not directly affect to pig productivity, but it needs the efforts to reduce the mortality of post-weaning for improvement of pig productivity. We suggest that this data will be useful to swine industry as the fundamental information.
타액선조영술과 타액선도관세정술: 폐쇄성 타액선 질환을 중심으로
김조은(Jo-Eun Kim) 대한치과의사협회 2019 대한치과의사협회지 Vol.57 No.11
Chronic obstructive inflammatory disease of salivary glands is the most frequent disease of the salivary glands and is characterized by recurrent swelling and pain caused by pressure. Sialography is recommended for the diagnosis of obstructive sialadenitis to observe changes in duct morphology, such as stricture and dilatation. Intraductal irrigation using normal saline is a simple treatment for patients with chronic obstructive inflammatory disease by removing the microlith and mucous plugs in the duct. It can be used as a conservative treatment option for resolving the obstructive symptoms.