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홍원식(Hong Won-Sik) 동아인문학회 2014 동아인문학 Vol.27 No.-
포은 정몽주가 우리나라의 도학과 리학을 열었으며, 그것은 야은길재를 거쳐 한훤당 김굉필로 이어졌다는 것이 조선시대에는 정설처럼 받아들여졌다. 그런데 포은과 야은간의 학맥 전승 관계를 뒷받침해 줄 자료가 뚜렷이 없어서 늘 논란의 대상이 되기도 하였다. 그런데 새롭게 발굴된 <백원첩>을 통해 포은과 야은 두 사람간의 학맥 관계를 확인할 수 있음과 더불어 당시 포은의 동향인 영남 북부 일대에 그의 절의정신을 이은 학맥과 학파가 존재했음도 확인할 수 있었다. 그리고 그 가운데 한 대표적인 인물이 경재 홍로이다. 그는 포은의 문하에서 공부한 뒤 고려 멸망을 맞아 자진순절함으로써 정치적 운명을 같이하였으며, 몇몇 남은 시문 등을 통해 성리학에 대한 조예와 정통 주자학의 입장에 서 있었음을 밝혔다. It is allowed like orthodoxy in the Joseon dynasty that Poeun Jeong Mong-Ju had opened Dohak and Lihak of our country, and it had led to Handhweondang Kim Going-Pil through Yaeun Gil-Jae. By the way, for the reason there are not data which supports the transmission of academic genealogy between Poeun and Yaeun, the orthodoxy is a controversial matter. Through Baekwoncheop whcih is newly excavated, I can identify academic genealogy between Poeun and Yaeun, and can do academic genealogy and school which is descended from poeun’s spirit of loyalty in northern Yeongnam region. The representative man is Gyeongjae Hong-Ro. After he studies under Poeun, he shares political fate with poeun through dying for himself. And he showed orthodox position of Zhuzixue through remaining poetry.
오유혈(五兪穴)을 이용한 사시자법(四時刺法) -영추(靈樞)와 난경(難經)을 중심으로-
홍원식,엄동명,Hong, Won-Sik,Eum, Dong-Myung 대한침구의학회 2000 대한침구의학회지 Vol.17 No.4
There is a acupuncture method which make a difference according to the four seasons, according to body region or depth in skin. We call it Acupuncture follow the four seasons(四時刺法). In several chapters of Huangdineijing(黃帝內經) introduced Acupuncture follow the four seasons. Acupuncture follow the four seasons has two kinds of acupuncture method that is to acupuncture at body region and to acupuncture at five Su points(五兪穴). To use five Su points(五兪穴) according to Yongchu(靈樞) disagree with Nanjing(難經). In Yongchu(靈樞), the five phases property disagree with five Su points(五兪穴), but in Nanjing(難經) the five phases property agree with five Su points(五兪穴). Even if we can acupuncture the same point, there will be the different effect according as what is the purpose of doing acupuncture, and when we do acupuncture. That is to say, we can use apucupuncture for the purpose of prevention in Yongchu(靈樞), and for the purpose of healing the disease in Nanjing(難經). Therefore, because we select the point on the base of meridian Kis origin which spring out, we have to acupuncture Chong point(井穴) in winter according to Yongchu(靈樞). Because we select the point on the base of meridian Kis origin which flowing, we have to acupuncture Chong point(井穴) in spring according to Nanjing(難經). And in the base of five phases' property, the purpose of selecting five Su points(五兪穴) is the prevention according to Yongchu(靈樞), and the healing according to Nanjing(難經). So even though we acupuncture the exactly same Chong point(井穴), we can expect the effect that acupuncture method supply Ki for liver in winter. and the effect that it extract pathogenic Ki(邪氣) from the liver in spring.
자동차 전장제품의 무연솔더 적용기술 및 솔더 접합부 열화거동
홍원식,오철민,Hong, Won Sik,Oh, Chul Min 대한용접접합학회 2013 대한용접·접합학회지 Vol.31 No.3
Due to ELV banning, automotive electronics cannot use four kinds of heavy metal element (Pb, Hg, Cd, $Cr^{6+}$) from 2016. Therefore, this study was focused on degradation characteristics of Sn-3.0Ag-0.5Cu Lead-free solder joint with OSP and ENIG finsh under various reliability assessment method, as like to thermal shock test and high temeprature/high humidity test with test duration for cabin electronics. Also, we compared bonding strength degradation to other advanced research results of electronic control unit for engine room because of difference service temperature with mount location in automotive. Whisker growth phenomenon and mitigation method which were essentially consideration items for Pb-free car electronics were examined. Conformal coating is a strong candidate for mitigating whisker growth in automotive electronics. Necessary condition to adapt Pb-free in car electronics was shown.
Sn-3.0 Ag-0.5 Cu/OSP 무연솔더 접합계면의 접합강도 변화에 따른 전자부품 열충격 싸이클 최적화
홍원식,김휘성,송병석,김광배,Hong, Won-Sik,Kim, Whee-Sung,Song, Byeong-Suk,Kim, Kwang-Bae 한국재료학회 2007 한국재료학회지 Vol.17 No.3
When the electronics are tested with thermal shock for Pb-free solder joint reliability, there are temperature conditions with use environment but number of cycles for test don't clearly exist. To obtain the long term reliability data, electronic companies have spent the cost and times. Therefore this studies show the test method and number of thermal shock cycles for evaluating the solder joint reliability of electronic components and also research bonding strength variation with formation and growth of intermetallic compounds (IMC). SMD (surface mount device) 3216 chip resistor and 44 pin QFP (quad flat package) was utilized for experiments and each components were soldered with Sn-40Pb and Sn-3.0 Ag-0.5 Cu solder on the FR-4 PCB(printed circuit board) using by reflow soldering process. To reliability evaluation, thermal shock test was conducted between $-40^{\circ}C\;and\;+125^{\circ}C$ for 2,000 cycles, 10 minute dwell time, respectively. Also we analyzed the IMCs of solder joint using by SEM and EDX. To compare with bonding strength, resistor and QFP were tested shear strength and $45^{\circ}$ lead pull strength, respectively. From these results, optimized number of cycles was proposed with variation of bonding strength under thermal shock.
홍원식,Hong, Won-Sik 대한출판문화협회 1991 출판저널 Vol.89 No.-
허준이 한의학사상 주목할 만한 해부학자는 아니다. 그런데 이 소설은, 도처에서 극적 묘사를 통해 해부학적 지식이야말로 한의학이 지향해야 할 방향이고 당위이며, 그전의 해부학이 허준의 시기에 이르러 크게 발전했다는 식의 인식을 독자들에게 심어주고 있다.
초강인 AISI 4340 강의 부식 저항성 향상 및 응력부식균열
홍원식,박경순,이상율,김광배,Hong, Won-Sik,Park, Gyeong-Sun,Lee, Sang-Yul,Kim, Gwang-Bae 한국재료학회 1996 한국재료학회지 Vol.6 No.9
초강인 AISI 4340강을 85$0^{\circ}C$에서 2시간 동안 오스테나이징 처리 후 수냉하고, 250, 400, $600^{\circ}C$에서 각각 2시간 동안 템퍼링 처리를 하였다. AISI 4340강의 인장 특성은 상온에서 측정되었다. AISI 4340강 위에 니켈 전해도금된 것과 도금되지 않은 시편의 분극 특성이 3.5wt%NaCI 수용액과 인공해수에서 측정되었다. AISI 4340강위에 니켈 전해도금된 시편은 500mV(vs. Ag/AgCI)이하의 전위에서 부식 저항이 크게 향상되었다. 그러나 1A/$\textrm{cm}^2$의 전류밀도에서 30분 이상 니켈 전해도금된 시편은 도금층에 불순물과 기공이 형성되었기 때문에 AISI 4340강의 부식 저항은 감소되었다. AISI 4340강의 수소취화형 응력부식균열을 여러 작용 응력과 음극인가전력에서 U-bend 시편을 이용하여 IN 3.5 wt% NaCI 수용액에서 조사되었고, 수소취화형 응력부식균열 거동은 주사전자현미경으로 조사되었다.
Fe-Si 전기강판 폐스크랩을 이용한 연자성 분말 및 테이프 제조기술
홍원식,김상현,박지연,오철민,이우성,김승겸,한상조,심금택,김휘준,Hong, Won Sik,Kim, Sang Hyun,Park, Ji-Yeon,Oh, Chulmin,Lee, Woo Sung,Kim, Seung Gyeom,Han, Sang Jo,Shim, Geum Taek,Kim, Hwi-Jun 한국마이크로전자및패키징학회 2016 마이크로전자 및 패키징학회지 Vol.23 No.2
This study focused on examining the possibility for recycling of Fe-Si electric sheet. We manufactured Fe-6.5Si mother alloy using by Fe-Si electric sheet scrap for transformer core materials. And then, soft magnetic alloy powder which diameter and shape were $45{\sim}150{\mu}m$ and sphere type was prepared by gas atomization process. As we compared to commercial Fe-6.5Si powder, its diameter distribution and microstructure of recycled powder was a similar. To investigate the possibility of reusing the soft magnetic composite sheet for electronics, recycled powder was treated to have a high aspect ratio (AR), and we finally obtained the 65~66 AR and $2.3{\mu}m$ thickness powder. To release the residual stress of powder, heat treatment was conducted under $300{\sim}400^{\circ}C$, $N_2$ gas. And then, soft magnetic sheet was made by tape casting process using by those powders. After the density and permeability of tape was measured, and we confirmed that the recycled Fe-Si electric sheet scrap was possible to reuse the soft magnetic materials of electronics.