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.

고령자 급성 췌장염의 임상적 고찰

백용한,서정훈,송건훈,이진헌,송시영,정재복,강진경,박인서,이수진 大韓消化器病學會 1998 大韓消化器病學會誌 Vol.32 No.3

Cosmetics Material Research of FRO Extract

Seo-Young PARK1,Young-Jin SO 한국웰빙융합학회 2021 웰빙융합연구 Vol.4 No.3

Purpose: In this study, skin and lotion containing 10% FRO were prepared to compare the skin improvement effects. Research design, data and methodology: After using cosmetics containing FRO ingredients, analysis was performed for 6 weeks. Results: As a result of measuring the moisture and elasticity of the pores, significant results were obtained only in the pores when used for 2 weeks between the experimental group and the control group (p<.001). Also after 4 weeks of use, moisture (p<.05) showed significant results, and after 6 weeks of use, moisture (p<.01) and elasticity (p<.001) showed significant.

인라인 스케이트 이용자들의 손상 유형과 위험 요인

서혜경,문지영,성주욱,김말영,이준호,박정이,차성화,백나영,이재민,김수민,임현술,정해관,배근량,정철 東國大學校醫學硏究所 2004 東國醫學 Vol.11 No.2

지난 몇 년 사이 인라인 스케이트는 젊은층을 중심으로 인기있는 스포츠가 되었으며 이러한 대중화와 더불어 인라인 스케이트와 관련된 사고 빈도도 증가하는 추세이다. 따라서 본 연구는 인라인 스케이트 이용에 따른 사고율과 이용습관 형태, 손상 유형 및 위험 요인을 알아보고자 시행되었다. 2003년 9월 14일부터 9월 24일까지 경주시 ○○초등학교 6학년, ○○중학교 1학년, ○○여자고등학교 1학년, ○○고등학교 1학년, 동국대학교 의과대학 의학과 학생, 경주황성·포항 해맞이 공원의 성인을 포함한 총설문 대상자 1,305명 중 인라인 스케이트 이용자 392명을 대상으로 단면 연구를 수행하였다. 조사에 앞서 병원 방문과 사전 조사를 시행 하였으며 자기 기입식 설문지를 통해 정보를 수집하였다. 초, 중, 고 인라인 스케이트 전체 이용률은 28.1% 사고율은 30.1%로 나왔으며 주로 젊은층에서 사고가 많았으며 나이가 증가할수록 빈도가 증가하였다. 보호 장비 착용률은 44.4%로 조사되었다. 손상 부위로는 무릎과 상지 부위가 많은 것으로 조사되었으며 손상 유형은 찰과상과 타박상이 많았다. 스케이트를 타기 시작한지 1개월 이내에서 사고를 가장 많이 당한 것으로 나타났다. 전체 부상자의 20%가 후유증이 있었던 것으로 나타났다. 본 연구에서 인라인 스케이트 이용자들의 사고율이 비교적 높음을 알 수 있었다. 손상 부위의 무릎 및 상지 집중 현상으로 인해 무릎과 상지 부위의 보호대 착용이 필요할 것으로 생각되며 또한 사고를 줄이기 위해 초기 기술 습득 단계부터 전문가를 통한 체계적 교육과 안전 의식 고양이 필요할 것으로 보인다. In the past several years, Inline skating has become a popular sport among young people. With popularization of Inline skating, the number of injuries has increased proportionately. The purpose of this study is to evaluate the prevalence of injuries, the behaviors of skating, the nature and risk factors of injuries. We conducted a questionnaire an 1,305 subjects from Sep. 14 to 24, 2003. The Inline skaters were 392. These participation were mainly students from ○○elementary school, ○○middle school, ○○women's high school, ○○high school, Dongguk medical school, and adult skaters in several parks. The prevalence of injuries were 30.1%. Injuries were predominant from younger age and frequencies were increased according to increasing age. The most common location of injuries were both knee and the upper extremities. Most of injury type were skin abrasion and contusion. Injuries were highest within one month after First skating. 20% of injuries experienced a sequela. The results of this study show the severity of Inline skating-related injuries. We expect that the knee and the upper extrimities protectors should be used adequatly. Also to reduce injuries, when the skills are obtainded, the specilized learning programs and safety awareness are needed.

신생아에 심한 심부전증을 일으킨 선천성 뇌동정맥 기형: 풍선 색전 요법을 시도한 1례

박인숙,김영휘,홍창의,조영국,서대철,박영일 울산대학교 의과대학 1993 울산의대학술지 Vol.2 No.2

Cerebral arteriovenous malformation is a rare cause of congestive heart failure in neonates and is known to carry a very poor prognosis even wish prompt recognition and aggressive treatment. We recently encountered a 2-day-old male neonate with huge cerebral arteriovenous malformation who presented with intractable heart failure. Despite aggressive medical treatment and partial embolization with detachable balloon, baby died of severe hearts failure. Since there is no report of percutaneous balloon embolization in a neonate with this lesion in Korean literature, we wish to present our experience in one such neonate. Also we believe this is the first report of color Doppler findings in cerebral arteriovenous malformation in Korean literature.

연령증가에 따른 혈압요소들의 좌심실비대 및 관동맥질환과의 관련성

박재석,박창규,박미영,박재형,김용현,나진오,신성희,서순용,홍순준,박성미,임홍의,김응주,서홍석,오동주,노영무 대한순환기학회 2004 Korean Circulation Journal Vol.34 No.2

남매에서 발생한 심한 용혈성 빈혈과 간경변증을 동반한 Wilson 병 2례

노영일,박동호,서우철,문경래,박상기,박영봉,이미숙,전호종 조선대학교 1995 The Medical Journal of Chosun University Vol.20 No.1

We experienced two case of Wilson's disease in female and male sibling. The first case was a 10 year-old female who showed jaundice. pancytopenia and cirrhotic change in liver biopsy. She died 10 days after diagnosis. The second case of 7 year-old male showed specific symptoms and revealed increased AST/ALT, low serun copper level and increased 24 hour urinary copper excretion level He is being treated with D-penicillamine and follow up examinations.

급성 골수성 백혈병 환자에서 발생한 침습성 아스페르길루스중에 대한 수술적치료 1 예

배영환;어원식;어상민;김승만 김태영;박수영;서영경;정은주;안효정 인제대학교 2011 仁濟醫學 Vol.32 No.-

Invasive pulmonary aspergillosis is known to have a poor prognosis and major cause of morbidity and motality in patients with hematologic disease. Without adequate therapy, invasive pulmonary aspergillosis will almost always progress to fatal pneumonia. Early administration of antifungal agents in patient with invasive pulmonary aspergillosis is most important. And surgical resection of aspergillous-infected tissue may be useful in patients with lesions that are contiguous with great vessel and lesions causing hemoptysis. We reported a rare case of surgical resection as curative treatment for invasive pulmonary aspergillosis patient in 58-year-old man who had the history of acute myeloid leukemia.

태권도 선수의 인지 재구성에 의한 시합 불안 감소 연구

박영수 ( Young Soo Park ),양대승 ( Dae Seung Yang ),서진교 ( Jin Gyo Seo ) 국기원 2010 국기원태권도연구 Vol.1 No.1

본 연구의 목적은 김용승(1996)이 개발한 심리기술 강화 훈련 프로그램(시합불안 제어용)의 단축형을 스포츠 현장의 태권도 선수 남녀 2명에게 적용하고 그의 시합불안 제어효과를 조사하고자 하는 것으로 2개의 1인 대상연구 형태로 이루어 졌다. 개입프로그램은 합리적 정서적 치료(RET) 및 합리적 인지 재구성(CRR)을 기반으로 하여 개발된 것으로, 현장에서 심리학적 전문지식이 없어도 적용이 가능하도록 127개의 진술 항목이 개발되어 포함되어 있다. 대상은 남녀 대학 태권도 선수 2명이며 평소 시합불안 제어가 필요함을 표현하던 선수였다. 연구개입은 각각 4회기에 걸쳐 이루어졌고, 개입 전후에 SCAT 검사를 하여 특성 시합불안의 변화를 조사하였다. 개입 후에는 보충면접(Back-up Interview)을 통해 1인 대상 연구의 단점을 보완하고자 하였다. 남자 P의 경우 개입 프로그램 전후의 SCAT 점수는 15점에서 14점으로 1점의 감소를 보였으나, 보충면접을 통해 개입 프로그램이 시합 불안을 낮추는데 효과가 있었다는 것이 밝혀졌다. 피험자 L의 경우도 개입 프로그램 전의 점수가 20점이었으나 프로그램 개입 후의 점수는 12점으로 대폭 감소하여 개입 프로그램이 L의 시합 불안을 급격하게 감소시킨 것으로 나타났으며, 보충면접에서도 L은 개입 프로그램으로 시합 불안이 크게 감소하였다고 진술하였다. 따라서 이 프로그램은 태권도 선수들의 시합 시 불안을 감소시킬 뿐만 아니라 훈련 시에도 개입효과를 기대할 수 있다. This study aims to apply the simple version of Mental Technique Enhancing Training Program (for controlling game anxiety) developed by Young-Seung Kim (1996) to 2 Taekwondo players (male and female) in the sports field and to research the game anxiety control effect and was composed of 2 one-person studies. The intervention program was developed based on Rational-Emotive Therapy (RET) and Cognitive, Rational Restructuring (CRR) and is composed of 127 statement items developed for this research so that it can be applied without psychological expertise in the field. The subjects were 2 college taekwondo players who needed to control game anxiety usually. The intervention was performed 4 times for each player and examined the change of game trait anxiety by SCAT test before and after the intervention. Back-up interview was conducted to compensate for the weakness of one-person study after intervention. In case of male subject P, the SCAT score decreased from 15 to 14 after the intervention but it was concluded through the back-up interview that the intervention was effective in reducing game anxiety. In case of subject L, the SCAT score sharply decreased from 20 to 12 after the intervention, showing that the intervention program reduced game anxiety drastically. The subject L also stated that the game anxiety was reduced greatly due to the intervention in the back-up interview. Thus, it was concluded that this program can not only reduce anxiety during a game for taekwondo players but also have anxiety control effect during training session.

2개월 남아에서 발병한 Malignant Ectomesenchymoma

황지영,서지현,김점수,김용숙,이수진,박찬후,김유경,박선후,이정희,안인옥,정기현,박병규 대한소아과학회 2001 小兒科 Vol.44 No.8