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크래시된 이미지와 딥 클러스터링을 통한 크래시 분류 개선
김요한 ( Yo-han Kim ),이상준 ( Sang-jun Lee ) 한국정보처리학회 2019 한국정보처리학회 학술대회논문집 Vol.26 No.2
소프트웨어 크래시 분류를 개선하기 위해 호출 스택 정보를 기반한 많은 연구들이 있다. 본 연구에서는 크래시 직전 이미지를 수집하여, 기존 호출 스택 기반의 분류에서 발생하는 문제를 개선하고자 한다. 또한 이미지 자체의 직관성으로 개발자뿐만 아니라 개발 지식이 없는 실무자도 크래시 정보를 활용할 수 있고, 문제 해결을 위한 재현 루트 파악, 위변조 여부와 같은 추가 정보를 확인할 수 있을 것으로 기대한다. 비지도 학습 기반인 딥러닝 클러스터링 N2D 알고리즘을 통하여 이미지를 자동 분류하고 순위화하는 시스템을 구축하여, 특정 소프트웨어에 특화되지 않고 다양한 소프트웨어의 크래시 이미지 자동 분류에 기여할 수 있을 것으로 기대한다.
온라인 L1 최적화를 통한 탐색기 비정렬 효과 제거 기법
김종한(Jong-Han Kim),한유덕(Yudeog Han),황익호(Ick Ho Whang) 대한전기학회 2017 전기학회논문지 Vol.66 No.7
This paper presents an L1 optimization based filtering technique which effectively eliminates the optical misalignment effects encountered in the squint guidance mode with strapdown seekers. We formulated a series of L1 optimization problems in order to separate the bias and the gradient components from the measured data, and solved them via the alternating direction method of multipliers (ADMM) and sparse matrix decomposition techniques. The proposed technique was able to rapidly detect arbitrary discontinuities and gradient changes from the measured signals, and was shown to effectively cancel the undesirable effects coming from the seeker misalignment angles. The technique was implemented on embedded flight computers and the real-time operational performance was verified via the hardware-in-the-loop simulation (HILS) tests in parallel with the automatic target recognition algorithms and the intra-red synthetic target images.
김외정,서진석,한태형,박종영,Kim, Wae-Jung,Suh, Jin-Suk,Han, Tae-Hyung,Park, Jong-Young 한국건설순환자원학회 2006 한국건설순환자원학회지 Vol.2 No.1
폐목질원료로서, 제재, 합판, PB, MDF와 폐침목 등의 해머밀에 의한 파쇄특성과 재생파티클 종류와 혼합비율에 따른 재생보드의 물성을 구명함으로써, 보드원료로서 재자원화 하는 방안을 모색해 보고자 하였다. 그 결과, 재생보드의 휨성질은 목질원료의 입자형태 및 입도분포에 크게 영향을 받으며, 파티클, 섬유와 같은 element가 압축고화된 상태의 판넬(PB, MDF)로부터 재생한 파티클은 물성저하를 초래하였다. 그러나, 재생파티클에 이미 도포 경화된 수지에 의해 재생보드의 치수안정성이 향상되는 효과가 있다. 따라서, 보드원료로서의 적합한 요건은 건전폐목재(제재, 합판)와 저급폐목재(PB, MDF)의 적정한 혼용에 있다고 할 수 있다. 본 연구에서는 건전폐목재 재생파티클과 재생 PB파티클의 혼용시험에서 제재파티클이 휨성질(MOR, MOE)과 박리강도에 기여하고, 합판파티클은 치수안정성에 더욱 기여하는 경향을 나타냈다. 또한 보드의 중층용 원료로 재생PB파티클의 혼합비율을 증가함에 따라서 보드의 휨성능이 감소되는 경향을 나타냈지만 혼합률 40%까지는 유의차가 없이 보드 15형(MOR : $153kgf/cm^2$, MOE : $27.5tonf/cm^2$) 수준의 성능이 구비되었다. 향후 생활폐목재(폐가구 등)와 같은 저급폐목재의 활용방안이 강구된다면 보드원료의 수급에 한층 기여할 수 있을 것이다. The hammer-milled characteristics of waste wood materials such as lumber, plywood, particleboard(PB), MDF and railroad tic were investigated in this study. The physical and mechanical properties of recycled boards according to types of recycled particle and the mixing ratios were also studied. The hammer-milled, waste wood materials had the dimensional distributions suitable for the core layer panicle. Bending strengths of recycled boards (one layer) were shown in order of plywood, PB(laboratory-fabricated with particles used in the PB factory), lumber, tego film-overlaid plywood, MDF, waste railroad tie, PB(factory-made) and LPL-overlaid PB. Cured resin and creosote containing waste wood contributed to dimensional stability of reconstituted boards. Considering the mixing effects between lumber and plywood with recycled PB particle, lumber particle was contributive to bending strength, MOE and internal bond(IB) strength, whereas plywood particle was contributive to dimensional stability. The bending and IB strength of 3 layer boards composing only recycled waste wood particles in core layer of board were in order of lumber, plywood, PB and MDF. On the other hand, the thickness swelling was in order of PB, lumber, plywood and MDF. Bending strength of the 3 layer boards mixed with recycled PB-particle in the core layer had a decreasing tendency, as the mixing ratios of recycled PB-particles increased. The dimensional stability of 3 layer recycled board was improved as the mixing ratio of recycled PB-particle increased same as in one layer. Formaldehyde emission of boards fabricated with recycled PB-particles in the core layer of the PB was in the range of E2 grade (below 5.0mg/l).
장석과 나노버블수를 이용한 친환경 건설재료 개발에 관한 기초적 연구
김진(Kim, Jin),김영호(Kim, Young-Ho),이종영(Lee, Jong-Young),한중근(Han, Jung-Geun) 한국지반신소재학회 2021 한국지반신소재학회 학술발표회 Vol.2021 No.3
This study was carried out to replace the aggregates used in mortar with feldspar and to develop ‘Eco-Construction Materials’ with enhanced strength by using ‘Hydrogen Nano-Bubble Water’ as compound water. A study was designed to compare the mortar and feldspar, and the general water and ‘Hydrogen Nano-Bubble Water’ and the results showed different strengths to understand the effects of each material.
가감통청산(加減通淸散)으로 치료한 만성 두드러기 치험 1례
김혜화,최정화,박수연,김종한,정민영,임경민,강병수,송유림,곽민경,Kim, Hye-Hwa,Choi, Jung-Hwa,Park, Soo-Yeon,Kim, Jong-Han,Jung, Min-Yeong,Lim, Kyeong-Min,Kang, Byung-Soo,Song, Yu-Rim,Kwak, Min-Kyung 대한한방안이비인후피부과학회 2016 한방안이비인후피부과학회지 Vol.29 No.4
Objectives : The purpose of this study is to report 1 clinical experience of korean medicine treatment on chronic urticaria identified as "Wind Heat" pattern. Methods : We treated a 63-year old woman patient with Gagamtongcheong-san, acupuncture and pharmacopuncture. The improvement of patients evaluated using CU-Q2oL, UAS, and photography. Results : CU-Q2oL score decreased from 95 to 18, UAS decreased from 6 to 0. Conclusions : The complex treatments of korean medicine and was effective to improve of chronic urticaria. It is necessary to have more observations and case reports.
산모의 항암화학요법 직후 분만된 신생아의 일시적인 호중구 감소증
김은나 ( Eun Na Kim ),한경희 ( Kyung Hee Han ),김수아 ( Su Ah Kim ),전종관 ( Jong Kwan Jun ) 대한산부인과학회 2010 Obstetrics & Gynecology Science Vol.53 No.9
The incidence of acute leukemia in pregnancy is as low as 1 in 75,000 pregnancies. There is no established guideline for the treatment of leukemia during midtrimester pregnancy. But nowadays, consensus is not to delay the leukemia treatment with chemotherapy even in pregnancy. Many authors reported successful outcomes of mothers and newborns. Because of the leukemia itself and side effects of the chemotherapy, anemia, thrombocytopenia and neutropenia are commonly encountered in women treated with chemotherapy. With chemotherapy in utero just before the delivery, the newborn could be neutopenic. We report one case of midtrimester pregnant woman who took chemotherapy for leukemia and suffered from neutropenic fever and preterm labor. The newborn was neutropenic. However, both the mother and the baby were successfully recovered from neutropenia.
LC-190 초경합금 분말을 이용한 레이저 클래딩 특성에 관한 연구(I)
김종도(Jong-Do Kim),박수한(Su-Han Park),송무근(Moo-Keun Song) 대한용접·접합학회 2018 대한용접·접합학회지 Vol.36 No.6
Cladding is an alloy layer that is superior in abrasion resistance by spraying, overlay welding, laser cladding or the like on its surface in case of abrasion due to repeated abrasion, impact, corrosion. Laser cladding is a process in which a clad material and a part of a substrate are melted with a high power laser beam to form a coating layer completely metallurgically bonded to the substrate. In this study, laser cladding was performed using Co-based LC-190 alloy powder for hard facing of ship exhaust valve. One-pass cladding was performed by varying the preheating temperature, laser output and beam feed rate of the base material using a diode laser with a maximum output power of 8.0 kW. The shape, dilution rate, Characteristics were observed. As a result, defects could be suppressed by applying preheating, and as the heat input increased, the width of the clad layer increased and the height decreased. In addition, the average hardness value was gradually decreased as a result of hardness measurement, and it was found that dilution was increased by EDS component analysis.
김길동(Kim Gil-dong),김종대(Kim Jong-Dae),이한민(Lee Han-Min) 한국철도학회 2005 한국철도학회 학술발표대회논문집 Vol.- No.-
There are operated the six thousand train in the interior of a country. 95% of them are possible usage of resuscitation. Especially, Among them VVVF-Inverter vehicle has a merit of the highest recycle rate. but we don"t use a apt recycled energy. Although the existing recy cle energy used inverter method supply with electric power, it is decided in accordance with thestate of sources. So efficiency of recycled electric power is of poor quality and catenary-voltage-fluctuation be generate because of recycled electric power. and it is able to affect system of safety train service. We"ll research the method of supply according to wire condition after storing recycle energy made during train"s stopping relation to Advanced EMU Research. Those methods are divided SMES, Fly-Wheel and Supercapacitor. and Considering the both economical efficiency and system application, we"ll develop recycle energy storage system suitable our country condition.