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Insulation Coating of Fe–Si–Cr Soft Magnetic Powder by Selective Oxidation
Jae‑Young Park,Kwangsuk Park,Bosung Seo,Julien O. Fadonougbo,Tae‑Wook Na,Ki Beom Park,Hyeon‑Tae Im,Nong‑Moon Hwang,Hyung‑Ki Park 대한금속·재료학회 2022 METALS AND MATERIALS International Vol.28 No.7
This study examines the insulation coating technology of Fe–Si–Cr powder via selective oxidation annealing, which oxidizeselements selectively by controlling the oxidation potential. The study calculated the oxidation driving force of Fe, Si, andCr, and conducted a thermodynamic analysis of oxidation and reduction conditions according to temperature and oxidationpotential. Based on the results, a selective oxidation annealing was performed in an atmosphere in which Fe is reduced andonly Si and Cr are selectively oxidized. The oxidation potential was controlled through the partial pressure ratio of hydrogenand water vapor. The XPS analysis results confirmed that a Si and Cr complex oxide layer formed on the powder surfaceafter the selective oxidation annealing. Afterward, withstanding voltages were analyzed to evaluate the insulation property. Then, the withstanding voltage of the powder applying the selective oxidation annealing increased significantly comparedto that of the initial powder. Further analysis showed that the powder annealed in an air atmosphere had a significantly lowersaturation magnetic flux density than the initial powder, while the powder applying the selective oxidation annealing hadonly a slightly reduced saturation magnetic flux density.
각종 소화성질환에서의 Campylobacter Pylori의 검출에 관하여
허정욱,강영우,박준호,박승국,하경임,김재룡,안성훈,박선우 啓明大學校 醫科大學 1988 계명의대학술지 Vol.7 No.2
Peptic disorders are among the most common maladies in korea as the world. In most cases their etiologies not be established and their pathophysioolgy remain obscure. Although the persence of fastric bacteria has been logn established, recently campylobacter pylori seems to be etiologic agent of peptic disorders. Campylobacter pylori is visualized in most cases of peptic disorders and not visualized after treatment of bctericidal agents, bismuth compound or metronidazole. We had a following results for identification of campylocacter pylori in stomach and duodenal mcuosa via endoscipc biopsy. 1. We studied 54 patients who had dyspeptic symptoms, 29 males. 2. Most patients are in 5th decades, next in 3rd and 6th in order. 3. Ptients were composed of 27 peptic ulcer, 22 gastitis and 5 gastric carcinoma. 4. Campylobacter pylori was identified in 69% of total patients, peptic ulcer 63%, gastritis 77%, stomach carcinoma leastly.
박금순,조재욱,김임수 한국식품영양학회 1999 韓國食品營養學會誌 Vol.12 No.2
겔화제로 녹두녹말, 감자녹말, 펙틴을 사용하여 당농도별 복숭아편을 제조하여 pH, 당도, 색도, 텍스쳐 및 기호성을 조사하여 품질특성을 검토하였다. 관능검사결과, 녹두녹말편이 감자녹말편보다 외관과 조직감에 대한 기호도가 높았으며, 펙틴 무첨가군 복숭아편을 더 선호하였다. 1% 펙틴첨가는 복숭아편의 기호도를 약간 감소시키는 것으로 나타났다. 기계적 검사는 녹두녹말편이 감자녹말편보다 조직감이 더 높았으며 펙틴 첨가군 복숭아편의 조직감이 더 높게 나타났다. 1% 펙틴 첨가의 효과는 복숭아편의 견고성과 씹힘성 등의 질감특성을 증가시켜 주었다. 기계적 검사의 탄력성은 관능검사의 매끈한 정도, 견고성, 외관의 기호도, 조직감의 기호도, 전반적인 기호도와 정적 상관관계를 나타내어 탄력성이 강할수록 기호도가 높게 나타났다. 색도는 펙틴첨가군이 높았으며 명도(L)는 녹두녹말편 적색도(a)는 감자녹말편이 높게 나타났다. 당 농도가 높을수록 명도(L)는 감소하였다. 관능검사의 전반적인 기호도에 가장 영향을 미치는 인자는 맛의 기호도, 조직감의 기호도, 견고성, 부착성, 맛 순으로 나타났다. This study was evaluate of chemical properties, textural characteristics and sensory properties, produced peach pyuns through the change of gelling agents such as mungbean starch, potato starch and pectin and of sugar density with 10%, 20% and 30%. Sensory evaluation was that peach pyun added mungbean starch was more preferable in appearance and texture than peach pyun added potato starch. Peach pyun added 0% pectin was more preferable than peach pyun with 1% pectin. As a result of texture analysis, the texture of peach pyun added mungbean starch was denser than that added potato starch. Adding 1% pectin to peach pyun increased mechanical properties such as hardness and chewiness. Mungbean starch pyun with pectin on lightness, Potato starch pyun with pectin on redness, and potato starch pyun with pectin on yellowness were significant(p<0.01). Lightness has a tendency to decrease with increasing sugar density. Adding 1% pectin has the effect to increase lightness, redness and yellowness. The subject parameters that effect overall quality on sensory evaluation were found taste quality, texture quality, hardness, adhesiveness and taste by using regression analysis.
환경영향평가에 있어서 보건영향평가의 방법, 절차 및 적용에 관한 연구
조일형,박재홍,김임순,한상욱 한국환경영향평가학회 2003 환경영향평가 Vol.12 No.3
Most environmental impact assessment(EIA) programs around the world require the consideration of human health impacts. Yet relatively few EM documents adequately address those impacts. This article examines how, why, and to what extent health impacts are analyzed in environmental impact assessments. This article investigates these problems and provides recommendations to improve human health impact assessment(HIA), using methods, procedures and case study. Also, a comprehensive approach for the evaluation of possible health effects in an EIA is described, illustrated with the example of Amsterdam Airport Schiphol. Unlike many EIAs, we estimated quantitatively the impact of aircraft-related pollution in terms of the number of affected people for aircraft noise annoyance, odour annoyance and hypertension. In addition, an analysis of health registry data on cardiovascular and respiratory diseases and a short survey on annoyance and risk perception were carried out.
Risk Based Inspection 기법을 이용한 화학공장의 안전성 향상에 관한 연구
노용해,유진환,서재민,임차순,고재욱 한국산업안전학회 2002 한국안전학회지 Vol.17 No.3
The RBI technique proposed by API is composed of three steps. The qualitative RBI method can be used for the purpose of screening the components with high risk. And, the quantitative RBI method employs complex risk evaluation model for predicting component risk in a quantitative manner. The inspection program can be optimized based on the results obtained by these RBI technique. The forementioned RBI technique has been applied to a common hydrodesulfurizer unit and the technique is critically evaluated for studying its benefits and limitations, which is the main issue of this thesis. It's conducted that the RBI method can provide a method for defining and measuring the component risk, and also provide a powerful tool for managing many of the important elements of a process plant.
Lee Jae Wook,Hur Jee Hye,Yang Dong Hyun,Lee Bae Young,Im Dong Jin,Hong Su Jin,Kim Eun Young,Park Eun-Ah,Jo Yeseul,Kim Jeong Jae,Park Chul Hwan,Yong Hwan Seok 아시아심장혈관영상의학회 2019 Cardiovascular Imaging Asia Vol.3 No.4
Cardiovascular magnetic resonance imaging (CMR) is expected to be increasingly used in Korea due to technological advances and the expanded national insurance coverage of CMR assessments. For improved patient care, proper acquisition of CMR images as well as their accurate interpretation by well-trained personnel are equally important. In response to the increased demand for CMR, the Korean Society of Cardiovascular Imaging (KOSCI) has issued interpretation guidelines in conjunction with the Korean Society of Radiology. KOSCI has also created a formal Committee on CMR guidelines to create updated practices. The members of this committee review previously published interpretation guidelines and discuss the patterns of CMR use in Korea.
Lee, Jae Wook,Hur, Jee Hye,Yang, Dong Hyun,Lee, Bae Young,Im, Dong Jin,Hong, Su Jin,Kim, Eun Young,Park, Eun-Ah,Jo, Yeseul,Kim, Jeong Jae,Park, Chul Hwan,Yong, Hwan Seok Korean Society of Magnetic Resonance in Medicine 2019 Investigative Magnetic Resonance Imaging Vol.23 No.4
Cardiovascular magnetic resonance imaging (CMR) is expected to be increasingly used in Korea due to technology advances and the expanded national insurance coverage of these tests. For improved patient care, it is crucial not only that CMR images are properly acquired but that they are accurately interpreted by well-trained personnel. In response to the increased demand for CMR, the Korean Society of Cardiovascular Imaging (KOSCI) has issued interpretation guidelines in conjunction with the Korean Society of Radiology (KSR). KOSCI has also created a formal Committee on CMR Guidelines to write updated practices. The members of this Committee review previously published interpretation guidelines and discuss the patterns of CMR use in Korea.