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.

구어체 소설의 문학교육적 가치

박기범 ( Ki Beom Park ) 한국문학교육학회 2016 문학교육학 Vol.0 No.51

본고는 한국 문학의 전통이라고 할 수 있는 구어적 소설의 담론이 갖는 문학적 의의와 가치를 조명해 보고, 그 내용을 문학교육의 내용으로 적극 반영할 것을 제안하였다. 이를 위해 김유정, 채만식, 이문구, 황석영, 성석제, 이기호의 구어체 소설을 중심으로 살펴보고, 그러한 구어체 소설이 서사 문학의 전통 중하나인 공동체적 경험에 터한 ‘공감’과 ‘울림’의 문학적 소통 방식임을 확인하였다. 그리고 2015 개정 교육과정을 중심으로 한국 문학 전통의 이해와 소설담론 교육의 필요성에 근거하여 구어체 소설의 문학교육적 가치와 가능역을 살펴보았다. This paper is to examine the significance and literary value from the Korea oral language novels those are the Korea Literature tradition, and to propose that education be taught in the literature for the oral language novels. To this end, this paper investigated the novel of Kim, Yu-Jeong, Chae Man-sik, Lee Mun-ku, Hwang Sok-yong, Sung Suk-je, Lee Ki-ho ’s works. and We found that the oral language discourse is communication method of ‘empathy’ and ‘convenir’ based on the community experience and spirit. At last, This paper proposes the possibility of literature educational value of oral language novels, based on Korea’s literary tradition and the necessity of understanding and teaching discourse of novel, focusing on the 2015 curriculum.

간경변증 환자에서 Escherichia coli 균혈증 합병 시 간기능 장애에 따른 C-reactive protein 생성 능력에의 영향

박완범,강철인,김동민,이기덕,장희창,김홍빈,오명돈,이효석,최강원 대한감염학회 2003 감염과 화학요법 Vol.35 No.5

목적 : C-reactive protein(CRP)은 간에서 생성되는 급성 반응물질이다. 하지만 간부전증 환자에서 CRP의 반응이 간기능에 따라 어느 정도 영향을 받는지는 별로 알려진 바가 없다. 본 연구에서는 간기능에 따른 CRP 생성 능력을 평가하고자 하였다. 방법 : E. coli 균혈증이 있는 간경변증 환자 30명을 대상으로 하였고 간기능은 균혈증이 발생하기 전 2개월 이내에 측정된 혈청 빌리루빈, 혈청 알부민, 프로트롬빈시간, Child-Pugh 점수로 평가하였다. 대조군 A는 간질환이 없으면서 E. coli 균혈증이 발생한 환자 30명으로 하였고 대조군 B는 간경변증이 있으면서 급성 감염의 증거가 없는 환자 30명으로 하였다. 환자군과 대조군 간에 CRP의 최대값을 비교하였다. 결과 : CRP의 최대값은 환자군에서 7.3±5.0㎎/dL, 대조군 A에서 17.9±8.3㎎/dL로 환자군에서 유의하게 낮았다.(P<0.001). 간경변증 환자에서 CRP의 생성은 Child-Pugh 점수에 비례하여 감소하였으나(P=0.004) Child=Pugh class C의 간기능을 가진 환자군에서도 대조군 B와 비교하여 의미있는 CRP의 생성을 보였다(5.3±3.2 vs. 0.5±0.4㎎/dL, P<0.001). 결론 : 간기능부전 환자에서 CRP 반응은 간기능 저하 정도에 따라 둔화되지만 심한 간기능 장애를 가진 환자에서도 CRP의 생성은 유지된다. Background : C-reactive protein (CRP) is an acute phase reactant produced in the liver. To assess the influence of liver dysfunction on the production of CRP, we evaluated CRP response to E. coli bacteremia in patients with or without liver cirrhosis (LC). Methods : 30 LC patients who developed spontaneous peritonitis with E. coli bacteremia were enrolled in the study. Baseline values of total bilirubin, serum albumin, and prothrombin time were obtained within 2 months prior to infection. Liver dysfunction was categorized according to the Child-Pugh score. 30 patients with E. coli bacteremia who had no underlying liver dysfunction were included as a control group. Matched-control of 30 LC patients without evidence of acute infection was also included. The peak CRP values were compared among the groups. Results : In the patients with E. coli bacteremia, the mean value of peak CRP was 7.3 (+/- 5.0) ㎎/dL in LC patients, 17.9 (+/- 8.3) mg/dL in patients without liver dysfunction (p<0.001). In the advanced LC patients with Child-Pugh class C, the level of CRP was 5.2 (+/- 3.3) ㎎/dL in patients with E. coli bacteremia, 0.5 (+/- 0.4) ㎎/dL in patients without acute infection (P<0.001). Child-Pugh score had correlation with decrease of CRP (linear regression test, P=0.004). Conclusion : CRP response during E. coli bacteremia was attenuated but maintained even in patients with advanced liver dysfunction.

간경변증 환자에서 Escherichia colli 균혈증 합병 시 간기능 장애에 따른 C-reactive protein 생성 능력에의 영향

박완범,강철인,김동민,이기덕,장희창,김흥빈,오명돈,이효석,최강원 대한감염학회 2003 감염과 화학요법 Vol.35 No.5

성인의 만성 기침에 대한 감별진단으로서의 백일해

박완범,박상원,이기덕,이창섭,장희창,김홍빈,김의종,오명돈,최강원 대한감염학회 2004 감염과 화학요법 Vol.36 No.6

목적 : 백일해는 소아기에 발생하는 전염병으로 오랫동안 알려져 왔다. 그러나, 미국과 유럽에서는 1990년대에 들면서 성인에서도 백일해가 유행하며, 만성 기침 환자의 20% 정도가 백일해를 앓는 것으로 보고하고 있다. 저자들은 국내에서 성인 만성기침의 원인으로 백일해의가능성을 확인하고자 하였다. 재료 및 방법 : 2002년 9월부터 2003년 5월까지 서울의 일개 대학보건진료소 또는 일개 시립병원 외래를 방문한 환자 중 기저 폐질환 없이 1주 이상 기침을 하는 성인을 대상으로 Bordetetlla pertussis에 대한 배양검사와 중합효소 연쇄반응검사(PCR)를 시행하였다. 결과 : 1주 이상의 기침을 하는 성인 102명 중 배양검사에서 양성인 환자는 없었으나 3명(2.7%)에서 PCR 양성이었으며 이들 모두 3주 이상 기침이 지속되었고 백일해의 특징적인 증상을 호소하였다. 결론 : 국내에도 성인에서 백일해가 발생하고 있음을 확인하였고 따라서 성인 만성기침의 원인으로 백일해를 감별 진단해야 한다. Background : Pertussis was long considered a childhood illness. However, in the last two decades, it has been reported as a cause of prolonged cough in adolescents and adults in other countries. Infection of Bordetella pertussis was prospectively searched among adults with a persistent cough. Materials and Methods : Adult patients, who visited either the outpatient clinic of a municipal hospital or a university health service center due to cough of more than six days' duration without underlying pulmonary disease, from September 2002 to May 2003, were enrolled. The culture and polymerase chain reaction (PCR) were used for confirming of B. pertussis infection. Results : 102 adult patients with persistent cough were evaluated. 3 (2.9%) patients were PCR positive for B. pertussis. There were no patients with positive culture. All patients with positive PCR had one or more classic symptoms of pertussis and their cough persisted for 3-7 weeks. Conclusion : We confirmed the morbidity of pertussis in Korean adults with persistent cough. Pertussis should be considered as a differential diagnosis of chronic cough in adults.

대전에서 연중 태양광선의 UVA와 UVB양에 대한 조사 (예비보고)

박장규,김경훈,이우재,서기범 충남대학교 의과대학 지역사회의학연구소 1993 충남의대잡지 Vol.20 No.2

Ultraviolet A(355 nm) and ultraviolet B(290 nm) doses were measured at Taejon from March to September, 1993, on four different weather conditions(clear, relatively clear, relatively cloudy and cloudy). And the results were compared with the doses of Kongju area measured in 1985. The followings were the summary of the findings. 1. UVA(1.98± 0.35 × 10 exp(-3) w/㎠) and UVB(17.62+ 5.72 X 10 exp(-6) w/㎠ doses were peak at noon on clear weather. 2. Average doses of UVA(2.36±0.70 × exp(-3) w/㎠) and UVB(24.28±8.83 × exp(-3) w/㎠) were peak at noon in August on clear weather. 3. The doses of UVA and UVB were influenced by yellow sand, fog and other pollutants. 4. The doses of UVA on clear weather in Daejoen were lower than Kongju about 40%, in contrast those of UVB were not different in statistical values.

자극성 물질이 첩포시험 결과에 미치는 영향에 대한 연구

박장규,이우재,김경훈,서기범,이증훈 충남대학교 의과대학 지역사회의학연구소 1993 충남의대잡지 Vol.20 No.2

We studied the effects of irritants on the positive patch test sites in 6 volunteers. We firstly performed the patch test with 2, 4, 6, 8, 10% sodium lauryl sulfate on the back of 22 volunteers. Allergens (thimerosal, mercury ammonium chloride) were applied in duplicate, and 24 hours later they were removed and sodium lauryl sulfate was applied for a further 24hours to one set of patches. Response of allergen alone were measured at 24 hours, 48 hours, 72 hours, 120hours, 140hours and the degree of inflammation of the other site(allergen + irritant) was graded 30 minutes, 24, 48 and 72 hours later according to International Contact Dermatitis Research Group. The results were as follows 1. Twenty volunteers(90.9%) showed irritation sign on the patch sites with 6% sodium lauryl sulfate. 2. In the results of patch test in 6 cases with positive allergen sites, 5 cases showed the similar results with those of previous patch test (reproducibility = 83 %) 3. When we assessed the patch test results according to ICDRG, the results of patch tests after application with irritants on previous positive allergen slites did not show stronger responses than those of positive allergen alone 4. The results of patch test after application with irritants on previous negative allergen did not show erythema. It seems that the effect irritant application of lower concentration than irritant dose not influence the response to the allergen concentration than to cause erythema, on the response of allergen

인라인 스케이트 T300m 출발동작 분석

박기범,양정옥,이중숙 한국운동역학회 2003 한국운동역학회지 Vol.13 No.2

Park, K-B, Yang, J-O and Lee, J-S. An Analysis of Starting Motions in Time 300m Inline Skating. Korean Journal of Sport Biomechanics, Vol. 13, No. 2, pp. 123-137. This study is to present more effective starting skills through analysis of kinematic characteristics of starting motions in 300m Time Trials of Inline Skating. To achieve this goal, 6 athletes, 3 in the national team and 3 in business teams were chosen and their starting motions were examined with three-dimensional image analyses. The results of analyses in regard of positions and speed of the bodily center and angles, angular velocity, and linear velocity of articulations of lower limbs by sections of starting motions are as follows; In case of the central position, though it is effective to reduce the air resistance by lowering the upper part of the body maximumly, it is reasonable to accelerate by raising the upper part of the body to some degree for the running posture at the lower speed in the starting section. In the starting section, it is efficient to minimize the period of time in touching the ground. For this, it is necessary to train for taking motions without slippage while touching the ground. While 3 athletes in business teams kicked the ground as running right after the starting, the others in the national team slid on the ground. As the number of steps increased, the movable speed changed quickly. Thus he movable speed of athletes in the national team indicated big differences in two to three steps. If these factors are well supported, the push-away starting method might be better than the running starting method in terms of improvement of records.

제7차 교육과정에 따른 문학 교과서의 내용 분석 연구 : 수록된 문학 작품을 중심으로

박기범 한국문학교육학회 2003 문학교육학 Vol.11 No.-

This thesis tries to analyze and evaluate the contents of literary works in the 7th curricular literature textbooks. The characteristics of works in new literature textbooks compared with those in the 6th curricular ones can e summarized as follows: 1. The latest literary works are selected in the new textbooks without limit to the time when they were written. 2. Literary works by left-wingers and writers and writers who have hone to North Korea are selected in the new textbooks. 3. Literary works by students and amateurs are selected. 4. Literary works by Third World writers are given consequences. 5. Literary works by compatriots in China and North Korean writers are selected. 6. Literary works by pro-Japanese writers are appeared. 7. Various kinds of literary works such as words of songs, interview scripts, newspaper and magazine articles, internet articles, cartoons, pictures and photographs are selected. 8. Many literary works in the 7th curricular literature textbooks become of less importance than when they were in the 6th curricular literature textbooks. But apart from such improvement, the new literature textbooks still have some defects in selected works as follows: 1. Too many works are selected to be covered in class, and there exist wide differences in selected works from textbook to textbook. 2. The importance of foreign literary works is decreased in new textbooks compared with those in the previous textbooks. 3. The disparity in balanced selecting literary works from various genres has not been corrected yet. 4. The number of ancient literary works is lessened in the new textbooks compared with those in the previous textbooks. 5. Some of the literary works in new literature textbooks and those in the national Korean Language textbook are overlapping.

제7차 교육과정에 따른 문학 교과서의 단원 체제 연구

박기범 청람어문교육학회 2004 청람어문교육 Vol.28 No.-

본고는 제7차 교육과정에 맞춰 새로 제작된 문학 교과서들의 단원 체제를 비교 분석함으로써 여기에 반영된 문학교육의 방법론을 살펴보고, 나아가 앞으로 문학 교과서 개발에서 고려해야할 사항과 이를 위해 선행되어야 하는 연구 과제를 찾아보고자 하였다. 18종 문학 교과서의 단원 체제를 비교, 분석한 결과 많은 문학 교과서가 교육과정에서 제시한 내용 체계와 영역별 내용을 지나치게 경직화, 단순화시켜 반영하고 있는 것을 알 수 있었다. 이와 함께 차후 새 문학 교과서의 개발과정에 필요한 선결 과제들을 일곱 가지로 간추려 제시하였다. 이 연구를 통해 우리는 문학교육의 교재 개발에 여러 가지 시사점을 얻을 수 있을 것으로 기대한다. The aims of this paper is to compare and analyze the units of literature textbook developed by the system of 7th curriculum and investigate methodology of literature and then find considerations and subjects of study which are preceded when we develope literature textbook in the future. After comparative analysis of the system of units in 18 kinds of literature textbook, most of the literature textbooks extremely followed systems presented by 7th curriculum without any changes and improvement