Mg-Li-AI합금의 부식특성에 미치는 Y의 영향

김순호,김경현,배차헌,김인배,Kim, Sun-Ho,Kim, Gyeong-Hyeon,Bae, Cha-Heon,Kim, In-Bae 한국재료학회 1996 한국재료학회지 Vol.6 No.11

Mg-8Li-4AI 합금의 부식특성에 미치는 Y의영향을 전기화학적 분극시험 및 침지시험을 통하여 조사하였다. 전기 화학적 분극시험에서는 Y첨가량이 증가함에 따라 활성화 영역이 감소하엿고 부식전위가 증가하였으며, Y이 4.08wt% 첨가된 경우가 Y이 첨가되지 않은 경우에 비해 부식속도가 크게 감소하였다. 침지시험에서도 Y의 첨가량이 증가함에 따라 Y을 첨가하지 않은 시편에 비하여 무게감량 및 부시속도가 감소하였으며, Y이 첨가되지 않은 합금의 부식속도는 침지시간에 따라 급격히 증가하였지만 Y이 첨가되지 않은 합금의 부식속도는 침지시간에 따라 급격히 증가하였지만 Y이 4.8wt% 첨가된 합금은 96시간 이후부터 더 이상 증가하지 않았다. 이러한 결과는 Y 화합물(Mg24Y5)이 $\alpha$/$\beta$계면에서 희생 양극으로 작용하였기 때문이라고 생각된다. 따라서 Y의 첨가는 Mg-Li-AI 합금의 내식성을 향상시키는 역할을 한 것으로 판단된다.

차량용 전자제어장치와 전압조정기 개선에 관한 연구

김순호,김효상,Kim, Sun-Ho,Kim, Hyo-Sang 제어로봇시스템학회 2001 제어·로봇·시스템학회 논문지 Vol.7 No.11

In this study, we define the measuring method of crank angle precisely using an event and perform a study on the hardware structure and software algorithms which is applicable for the commercial engine. Also we developed a Computer-ECU(Personal computer based electronic control unit) using a computer and a microprocessor, for performing the ignition at a desire position(angle) and for controlling a duty ratio a pulse for ISC(Idle speed control). We applied these algorithms to the modeling which is induced a concept of event and got a better result than a conventional ECU in the state of transient as a result of performing air fuel ratio control in a commercial engine. This technique can be used for the back to improve ECU performance. It the present type of Hybrid I. C voltage regulator is altered to the new type of regulator, we will be surely able to reduce the production cost as well as simplify the design of alternator\`s rear bracket and rectifier part because of the removal of trio diode. Experiment is taken by MS-R004.

환경개선 및 에너지 절감을 위한 증발, 농축기술

김순호,Kim, Sun-Ho 환경보전협회 1997 환경정보 Vol.19 No.7

연령별 가중치 분석을 통한 도시의 삶의 질 지표선정

김순호(Sun-Ho Kim),정혜영(Hye-Young Cheong),이명훈(Myeong-Hun Lee) 한국콘텐츠학회 2012 한국콘텐츠학회논문지 Vol.12 No.7

본 연구는 삶의 질에 대해 평가할 수 있는 객관적인 평가지표를 마련하고, 지역별 인구구성에 따른 차별화된 삶의 질 정책 실현을 위한 기초자료를 마련하는데 목적이 있다. 삶의 질 평가지표를 개발하고, 연령별 삶의 질에 대한 가중치 차이가 있는지 분석하기위해, ① 문헌 및 선행연구를 분석해 1차 평가지표를 선정한다. ② 전문가 FGI를 실시하여 최종 평가지표를 도출한다. ③ 전문가를 대상으로 가중치 분석을 실시한다. 분석 결과, ① 영역별 가중치는 가족안전, 경제안정, 주거문화, 보건복지, 교통환경 순서로 나타났다. 특히, 가족안전영역은 다른 분야보다 2배 이상 중요한 것으로 나타났다. ② 연령별 가중치 분석결과, 연령이 높을수록 경제안정을 중요시하는 반면, 가족안전영역에 대하여는 연령이 많을수록 가중치가 떨어졌다. 소득수준이 높아지면서 1인당 주거면적과 도시공원면적, 전시공연의 중요성이 모든 연령에 걸쳐 주거?환경?문화에 관심이 높아지고 있음을 시사한다. The purpose of this study is to analyze the quality of life and provide an objective evaluation, and differentiated according to the local population for the realization of the quality of life policies are intended to provide baseline data. This study analyzed to the Development of Quality of Life indicators and weights for age differences in the quality of life, first to select the literature and previous studies analyzing the primary evaluation criteria. Second, the final evaluation of professional conduct FGI indicators are derived. Third, experts will conduct analysis to target weights. As a result of the first domain-specific weights family safety, economic stability, residential culture, health and welfare, and traffic environment in order. In particular, a family safe zone more than twice that of the other areas appeared to be important. Is determined. Second, age weighted analysis, the higher the age, economic stability, while important, safe area for families, the more the weight of age shows a deterioration. As income increases per capita housing area and the city park area, the exhibition shows the importance of housing across all age, environment, culture, suggests that increasing interest will

Mg-Li-Al합금의 가공성 및 시효거동

강민철,김순호,정해용,이정무,김경현,김인배,Gang, Min-Cheol,Kim, Sun-Ho,Jeong, Hae-Yong,Lee, Jeong-Mu,Kim, Gyeong-Hyeon,Kim, In-Bae 한국재료학회 1992 한국재료학회지 Vol.2 No.6

Li의 양과 Al의 양을 달리한 $\alpha$(HCP) 단상 및 $\alpha$(HCP)+${\beta}$ (BCC) 2상 조직인 Mg-Li-Al합금을 시료로 하여 이 합금의 가공성과 시효경화륵성을 조사한 결과 $\alpha$단상보다는 $\alpha$+${\beta}$ 2상 조이,$\alpha$+${\beta}$ 2상조직에서는 Al양이 많을수록 가궁성이 증가하였으며 Mg-8.08Li-4.26Al의 경우 가공한계값은 62%였다. 이와같이 가공성이 증가한 이유는 basal plane뿐만 아니라 pyramidal plane과 prism plane에서도 슬립이 일어났기 때문이다. $\alpha$단상의 경우 MgL$i_2$ Al(${\theta}$)의 석출이 일어나지 않았으나 $\alpha$+${\beta}$ 2상 조직의 곁우 ${\beta}$상 내에서 ${\theta}$의 석출에 의한 피크경도같이 나타났으며, 2상 조직의 경우 경도값은 Al양이 많을수록 증가하였는데 이것은 Al양의 증가에 따른 Al Partition에 의한$\alpha$ 상의 강화와 ${\beta}$상에서의 석출물 증가에 의한 것으로 생각된다. Workability and aging behavior of Mg-Li-Al alloys hate been investigated with variation of Li and Al contents. It was found that ${\alpha}$(HCP) + ${\beta}$(BCC) two phase structure reveals better workability than ${\alpha}$(HCP) single phase structure. Increase of workability is attributed to the additional slip on pyramidal and prism planes besides the slip on basal plane of HCP Mg. Workability of ${\alpha}$+${\beta}$ two phase structure is improved with increased amount of Al. Among alloys studied in the present study, reduction limit up to 62 % was obtained for Mg-8.08Li-4.26Al. MgL$i_2$Al(${\theta}$) aging precipitation was observed in ${\alpha}$+ ${\beta}$ two phase structure, while it was not in a single phase structure. Result of microhardness reveals peak hardness for ${\alpha}$ +${\beta}$ two phase structure due to $\theta$ precipitate in ${\theta}$ phase. In ${\alpha}$+${\beta}$ two phase Mg-Li-Al alloys, hardness increased with increasing amount of Al. It is believed that addition of Al raised the amount Al partition in u phase and ${\theta}$ precipitation in ${\beta}$ phase.

A Study on the Hot Cracking Phenomena of Cu-Ni Bearing Hot Rolled Steels

윤인택,조열래,김순호,김인배,Yun, In-Taek,Jo, Yeol-Rae,Kim, Sun-Ho,Kim, In-Bae Materials Research Society of Korea 1999 한국재료학회지 Vol.9 No.4

The hot cracking phenomena and phase behaviors during hot working process of Cu-Ni bearing hot rolled steels were investigated by a $90^{\circ}$bending tests, BSE image analysis and EDS analysis. For aNi-free 1.2% Cu bearing steel, the surface hot cracking occurred about $1100^{\circ}C$ due to a liquid state Cu-enriched phase formed continuously at the interface between oxide scale and matrix. The liquid Cu-enriched phase penetrated into austenite grain boundaries and caused surface cracking during the hot working. In case of 0.6% Ni containing 1.2% Cu-Ni bearing steel, solid state Cu-Ni-riched phase existed at the scale/matrix interface as a discontinuous type. But the higher addition of 1.2% Ni, solid state Ni-Cu-riched phase was formed dominantly in the oxide scale. It was found that the addition of Ni suppressed the surface cracking of 1.2% Cu bearing steel by eliminating the liquid state Cu-enriched phase.

Mg-Li-AI-Zr 합금의 시효거동

현양기,강민철,김순호,김인배,Hyeon, Yang-Gi,Gang, Min-Cheol,Kim, Sun-Ho,Kim, In-Bae 한국재료학회 1996 한국재료학회지 Vol.6 No.9

Zr이 0.03wt%함유된 Mg-8.14Li-3.93AI 합금의 시효거동을 미소경도와 미세조직의 변화, 열분석 등으로 조사하였다. Zr의 첨가로 인하여 3원계 Mg-8.23Li-4.02A에 비하여 조직이 미세화되었으며 모든 시효조건에서 경도값이 높게 나타났다. 열분석결과 발열피크는 준안정 석출상인 MgLi2AI($\theta$)의 석출과 $\theta$상에서 안정상인 AILi으로의 변화와 관련된 것이고, 흡열피크는 $\theta$와 AILi상의 재용해에 대응되는 것으로 판단되었다. 피크 경도값(103Hv)은 $\theta$의 석출이 완료되는 393K에서 0.5시간 시효시 나타났으며 피크 경도조건에서의 미세조건은 $\beta$기지에 $\theta$와 AILi상이 공존하고 있음을 투과식 전자현미경으로 확인하였다.

The Category VRel(H)

Kul Hur(허걸),Sun Ho Kim(김순호),Pyung Ki Lim(임평기) 한국지능시스템학회 2009 한국지능시스템학회 학술발표 논문집 Vol.19 No.2

미세단백뇨를 보인 인슐린비의존성 당뇨병환자에서 혈압 및 맥박의 일중변동의 변화

김승준(Seung Jun Kim),배원엽(Won Yeop Bae),임석환(Seok Hwan Lim),이윤호(Yun Ho Lee),전인표(In Pyo Jeon),김순호(Sun Ho Kim),조상기(Sang Kee Cho),임중규(Joong Kyu Im),허진득(Jin Deuk Hur) 대한내과학회 1997 대한내과학회지 Vol.52 No.3

N/A Objectives: In diabetics the disturbance of circardian variation of blood pressure and heart rate has been supposed to be related to diabetic autonomic neuropathy and diabetic nephropathy. We performed this study to evaluate the circardian variation of blood pressure and heart rate and the difference of affecting factors between normoalbuminuric patients and microalbuminuric patients. Methods: We studied 50normotensive NIDDM patients without overt nephropathy, divided two grooups, which are normoalbuminuric patients(D1 group) and microalhuminuric patients(D2 group), according to the urinary albumine excretion rate(AER) on 24-h urine collection. We simultaneosly measured 24-hour blood pressure and heart rate by using of ambulatory 24-hour blood pressure monitoring (ABPM). Results: 1) In group Kb, 24-h systolic and diastolic blood pressure were significantly higher than in C(normal control group) and D1 2) 24-h heart rate values did not significantly differ between the groups, but night heart was significantly elevated in group D2 than C and D1. 3) The night/day ratio of SBP(systolic blood pressure) and HR(heart rate) was significantly higher in D2 than C and D1, but the night/day ratio of DBP(diastolic blood pressure) was significantly higher in D2 compaired with C only. 4) The night/day ratio of SBP correlated significantly with duration of diabetes, log of AER, HDL, HbAlc and 24-h DBP. The determinants selected in a multiple stepwise regression were duration of diabetes and HbAlc. 5) The night/day ratio of DBP was related to duration of diabetes, log of AER, 24-h DBP and night HR. The determinants selected in a multiple stepwise regression were duration of diabetes and 24-h DBP. 6) The night/day ratio of HB was related to neuropathy, 1/creatinine, HDL, night SBP, duration of diabetes and log of AER. The determinants selected in a multiple stepwise regression were neruopathy and night SBP. Conclusion: In this study, the normal circardian variation of blood pressure was disturbed in a group of micoralbuminuric patients. But it seems that AER was not a principle independent factor and circardian variation of blood pressure and heart rate were affected by different several factors identified in this study. The nocturnal heart rate was significantly elevated in microalbuminuric group, suggesting the possibility of the presence of parasympathetic neuropathy which is supposed to be related with sudden cardiac death. So it is thought that blunted circardian variation of blood pressure and heart rate can be a prognostic indicator and further prospective study is necessary.

청도 소싸움 축제의 장소마케팅에 관한 연구

이승곤(Lee Seung Gon),임근욱(Im Geun Ug),김순호(Kim Sun Ho) 한국호텔외식관광경영학회 2004 호텔경영학연구 Vol.13 No.1

This study reviews the concept of site marketing and the method of site marketing in our country as well as the conceptual study on the local festival. In addition, it analyzes the ultimate influence of regional festival, which is a representative method of site marketing in our country, over the activation of regional economy and the development of the region. The purpose of this research lies in the fact that, differently from the positive survey which used to be adopted by previous theses and was conducted taking the samples mainly from local government officials and the participants of the festival, the survey this time was conducted taking the samples of approximately 5% of local residents in Cheongdo, and the survey was conducted at the time when there is no festival and the residents are engaged in their own occupations. Moreover, the method of survey was to have a one-on-one questioning interview so that the sentiment of local residents in Cheongdo could be faithfully reflected in the survey.