Spin-based electronics and its activities and progress

임상호,한석희,신경호 한국물리학회 2006 Current Applied Physics Vol.6 No.1l

Fundamental limitation of current charge-based electronics technology is imminent as the technology progresses ever faster than before. Spin-based electronics or spintronics, which is a new field of electronics utilizing additional spin degree of freedom, is one of many technology options to fundamentally solve the limitation of current electronics. In this paper, current programs and accomplishments of spintronics research in Korea are briefly reviewed. In particular, research accomplishments achieved at KIST are described. Fundamental limitation of current charge-based electronics technology is imminent as the technology progresses ever faster than before. Spin-based electronics or spintronics, which is a new field of electronics utilizing additional spin degree of freedom, is one of many technology options to fundamentally solve the limitation of current electronics. In this paper, current programs and accomplishments of spintronics research in Korea are briefly reviewed. In particular, research accomplishments achieved at KIST are described.

환경농도 수준의 방화제 (fire retardants) 구성 화합물이 인체 세포에 미치는 영향

임상호,장진수,임현호,박철승,김인수 대한환경공학회 2007 대한환경공학회 학술발표논문집 Vol.2007 No.12

“2012년, 우리의 해로 만들어 갑시다!”

임상호,김형기,김원배,박성호,김성철,신두식,최유선,김윤수,권영훈,이재경,최서우,황동진,김재춘 (사)방송기자연합회 2011 방송기자 Vol.6 No.-

두경부에 발생한 신경초종에 대한 임상적 고찰

임상호,이경석,황병언,박희택,양윤수,홍기환 대한이비인후과학회 2011 대한이비인후과학회지 두경부외과학 Vol.54 No.4

Background and Objectives Neurogenic tumors in the head and neck are relatively rare and constitute around 0.5% of all head and neck tumors. Schwannoma, among neurogenic tumors, is a benign tumor originating from the spinal nerve root, peripheral nerve and all kinds of cranial nerves except the optic nerve and olfactory nerve. By presenting a series of head and neck schwannomas treated during a fifteen-year period, we aimed to analyze the clinical features, diagnosis, treatment and prognosis of schwannomas retrospectively. Subjects and Method We retrospectively reviewed and analyzed clinical records of 34 patients with head and neck schwannomas who were treated surgically at the University Hospital from January, 1995 to January, 2010. Results We found 34 cases of schwannoma in the head and neck. Among the patients, 14 were males and 20 were females. The most common age group was the 60’s while the most common site was the parapharyngeal space. The most common presenting symptom was palpable neck mass and the mean duration of symptoms was 41.6 months. The most common nerve of origin was the cervical plexus (29.4%). Preoperative diagnostic tools were FNA, CT and MRI. All cases were treated surgically and the most common postoperative complication was both transient and permanent voice changes. The mean follow-up period was 18.3 months and recurrence was not found during this period. Conclusion Thirty-four cases of schwannoma in the head and neck were presented with respect to their clinical features.

One-pot reaction을 통한 HDEHP 함유 다공성 실리카 복합체의 합성과 이를 이용한 우라늄 흡착연구

임상호,윤석본,김종윤,박재일,박태홍 한국공업화학회 2016 한국공업화학회 연구논문 초록집 Vol.2016 No.0

다공성 실리카 합성을 위한 전구체인 TEOS에 주 계면활성제인 n-dodecyl amine을 첨가하고, 보조 계면활성제인 동시에 우라늄 흡착 작용기인 HDEHP를 첨가한 후, 수열 반응시키는 일명 'one-pot reaction'을 통해 50~100 마이크로 크기를 갖는 HDEHP 함유 다공성 실리카 복합체를 성공적으로 합성하였음. 합성된 다공성 실리카 복합체는 나노미터 사이즈를 갖는 primary particle로 이루어져 있으며 이들 간의 응집이 일어나면서 다공성을 띠게 됨. 또한, 이들 간의 응집력은 HDEHP의 양에 따라 가속화되어 그에 따른 공동의 크기도 커짐을 확인 할 수 있었음. 다공성 실리카 구형입자의 표면에 돌출된 HDEHP의 친수성기인 인산은 우라늄을 선택적으로 흡착시키는 역할을 하는 것으로 잘 알려져 있음. 따라서, 합성된 HDEHP 함유 다공성 실리카 구형입자를 이용하여 우라늄 흡착실험을 수행하였음. 우라늄 흡착실험을 위해 다양한 농도의 우라늄 용액에 합성된 실리카 구형입자를 첨가한 후, 배치 테스트를 수행하였으며 multi-channel ICP-MS를 이용하여 초기 우라늄 용액과 흡착 후 여액의 우라늄 용액의 농도를 비교함으로써 우라늄의 흡착율을 도출하였음.

정밀 직교 피딩 로봇시스템 적용 롤 밴딩 공정 기술 개발

임상호,안상준,윤경열,Lim, Sang-Ho,Ahn, Sang-Jun,Yun, Gyeong-Yeol 산업진흥원 2022 산업진흥연구 Vol.7 No.4

본 연구는 기피공정중 하나인 롤밴딩 공정의 자동화시스템을 평가하였다. 그 결과 기존 1시간에 20개의 장약통을 생산하는 효율성을 1시간에 50개를 생산하는 공정으로 변화시켰다. 생산량의 평균값은 1시간당 57.6개의 생산, 반복정밀도의 오차는 0.03mm, 평균 롤 직경 오차값은 0.49mm, 평균 정렬 오차값은 0.09mm, 평균 공정리드타임은 43.21초로 나타났다. 생산성, 반복정밀도, 불량률, 얼라인 불량률, 공정 리드타임 등 구체적인 평가 방식을 제시하였다. 이를 통하여 자동화된 시스템을 검증하였다. 추후 본 연구에 수행된 내용들이 다른 자동화 시스템의 검증에 도움이 될 것으로 사료된다. This study evaluated the automated system of the roll bending process, which is one of the difficult processes. In the past, 20 cartridges were produced per hour. but Automation changed it to a process that produces 50 pieces per hour. The average value of production was 57.6 pieces per hour, error of repeatability was 0.03 mm, average roll diameter error value was 0.49 mm, average alignment error value was 0.09 mm and average process lead time was 43.21 seconds. This paper presented specific evaluation methods such as productivity, repeatability, defect rate, alignment defect rate, and process lead time. It is thought that the contents performed in this study will be helpful in the verification of other automation systems in the future.

타액선 Warthin’s 종양에 대한 임상적 고찰

임상호,유순호,이경석,황병언,이은정,홍기환,양윤수 대한이비인후과학회 2011 대한이비인후과학회지 두경부외과학 Vol.54 No.3

Background and Objectives The aim of this study was to define the clinical characteristics and treatment outcome of the salivary Warthin’s tumor in order to work out a therapeutic strategy. Subjects and Method The medical records of 64 patients who underwent surgery and were pathologically diagnosed with Warthin’s tumor at our department from January 1997 to December 2009 were reviewed retrospectively. Results There were 60 (94%) males and 4 (6%) females with an overall male-to-female ratio of 15 : 1. The average age was 59.8±9.2 years (range from 35 to 78). All tumors were found in the parotid gland. Of the 66 tumors, 31 (48%) occurred in the right side, 28 (44%) tumors occurred in left side, and 5 (8%) tumors occurred in bilaterally. A superficial parotidectomy was performed in 38 (59%) patients, lumpectomy in 25 (39%) patients and bilateral lumpectomy in one patient. There were 18 (28%) postoperative complications. The most common complication was transient facial palsy that occurred in 11 (17%) patients. Recurrence occurred in 2 (3%) patients, oneipsilaterally and the other contralaterally. All recurrences were found in patients who underwent superficial parotidectomy. Conclusion Warthin’s tumor has a very low recurrence rate with a benign nature. The study shows that lumpectomy is an effective surgical treatment for Warthin’s tumor with an advantage of reducing facial nerve palsy and recurrence rate.

호알칼리성 섬유소분해세균 Pseudomonas sp.의 분리 및 특성

임상호,윤민호,최우영 충남대학교 농업과학연구소 1998 농업과학연구 Vol.25 No.1

An alkalophilic bacterium, the strain AC-711 as a potent producer of alkaline cellulase, was selected among many isolates from soil environments. Morphological, physiological and chemical characteristics of the strain AC-711 suggested that it belongs to the genus Pseudomonas according to the Bergey's Manual of Systematic Bacteriology, however the G+C mol% (54.43) of its chromosomal DNA is lower than the normal values of the genus. The major cell wall fatty acids were determined as 15:0 and 17:0 anteiso. The production of alkaline CMCase by the strain was maximal when grown on the medium containing 1% carboxymethyl cellulose, 0.1% KH_2PO_4, 0.02% CoCl_2, 0.02% Tween 80, 0.5% Na_2CO_3, 0.8% yeast extract, pH 10.3 at 30℃ for 3 days, and the most of enzyme was excreted into culture medium.

융복합시대 청소년 경제교육에 대한 인식이 개인의 인격적 특성에 미치는 영향

임상호 한국디지털정책학회 2015 디지털융복합연구 Vol.13 No.11

LNAME(L-nitrow arginine methyl ester)와 MB(methylene blue)로 전처치한 토끼 대동맥환에서 Enflurane과 Desflurane 의 작용

임상호,권은정,강귀빈 대한마취과학회 1997 Korean Journal of Anesthesiology Vol.33 No.4

Background : Desflurane is a new inhaled anesthetic with the lowest blood/gas partition coefficient and enflurane is one of the major anesthetics in these days. But the effect of volatile anesthetics and the site of action on the blood vessel are still controversial. Since Furchgott(1980) discovered endothelium derived relaxing factor(EDRF) from endothelium, many investigators have studied about the relationship between the EDRF and the effect of the volatile anesthetics on blood vessels. In this study, we evaluated that the effect and the action site of enflurane and desflurane on isolated aortic rings of the rabbit. Methods : Each of obtained thoracic aorta from rabbits(1.5∼2.5 kg) was divided into 4∼6 mm rings, and a half of that were denuded. All of the aortic rings were preconstricted with phenylephrine 1.5 10-7 Mole in warm organ bath filled with modified Krebs' solution, and then LNAME(inhibitor of nitric oxide synthase, 3 10-4Mole) was administered to one group of aortic rings. MB(inhibitor of solub guanylyl cyclase, 2 10-5Mole) was administered to another one group and neither of LNAME nor MB was administered to the other group. And then enflurane(1%, 2%, 3%, 4%) or desflurane(6%, 9%, 12%) was administered to all of aortic rings. The polygraph recorded the changes of tension of aortic ring which was transmitted through the force transducer. Results : It was proved that basal EDRF was released from endothelium by the fact that intact aortic rings were more constricted after LNAME or MB administration. The intact aortic rings were constricted in all concentration of enflurane and both intact and denuded rings were maintained from control tension in all concentrations of desflurane. Conclusion : It is concluded that enflurane in all concentrations has an endothelium-mediated vasoconstriction effect and desflurane in all concentrations has no effect on isolated aortic rings of rabbit. (Korean J Anesthesiol 1997; 33: 583∼590)