Effect of Asymmetric Hot Rolling on the Texture Evolution of Fe–3%Si Steel

Tae‑Wook Na,Hyung‑Ki Park,박창수,Hyung‑Don Joo,Jong‑Tae Park,Heung Nam Han,Nong‑Moon Hwang 대한금속·재료학회 2018 METALS AND MATERIALS International Vol.24 No.6

In Fe–3%Si steel, the hot rolling process affects not only the hot rolling texture but also the primary recrystallization texture. Here, the effect of asymmetric hot rolling was studied by comparing the difference in the texture evolved between asymmetricand symmetric hot rolling. The effect of asymmetric hot rolling on the texture of primary recrystallized Fe–3%Si steel wasalso studied. The symmetric hot rolling of Fe–3%Si steel produces a rotated cube texture at the center but Goss and coppertextures near the surface. Asymmetric hot rolling tends to produce Goss and copper textures even at the center like thetexture near the surface. After primary recrystallization, the dominant texture at the center changes from {001} <210> to{111} <112> and the new texture has a higher fraction of the grains which make the low energy boundary with Goss grainsthan that of symmetric hot rolling.

지능형 원격 네트워크 온실

문병현,송주열,이현성,손경규,엄태환,김정우,김아름 대구대학교 정보통신연구소 2004 情報通信硏究 Vol.3 No.2

The system designed in this paper, can mark the interior state of greenhouse using sensors of temperature, humidity and illumination on greenhouse interior by greenhouse system for farm village area's agriculture automation. And, the real time monitor is possible real time monitoring by camera. Also, system that can supply water using spring cooler system and humidifier. The proposed system can sustain a designed environment of the greenhouse through rentilation fan, fluorescent light and roof door control. TCP/IP is used for the remote control of state the sensors in the client program. 본 논문에서 설계된 시스템은 농촌 지역의 농업 자동화를 위한 온실 시스템으로 온실 내부에 온도, 습도, 조도 센서를 이용한 온실 내부의 상태를 표시할 수 있으며 카메라를 이용하여 실시간 관측이 가능하다. 또한 본 시스템은 지붕 개폐, 스프링 쿨러와 가습기를 이용한 수분 공급, 환풍기, 형광등 등을 통하여 온실 내부의 환경을 유지시킬 수 있다. 모든 센서를 이용한 상태와 온실 제어를 TCP/IP를 이용한 클라이언트 프로그램에서 원격으로 관리할 수 있다.

마멸입자 형태해석에 의한 유압피스톤용 모터의 상태감시

문병주,조연상,박흥식,전태옥 韓國工作機械學會 2000 한국생산제조학회지 Vol.9 No.6

Morphological analysis of wear particles is one of useful methods for machine condition monitoring because it is well reflected in machine driving state. This paper was undertaken to apply to the condition monitoring of hydraulic piston motor. The lubricating wear test was performed under different experimental conditions using the wear test device and wear specimens of the pin on disk type was rubbed in paraffinic base oil by three kinds of lubricating materials, varying applied load, sliding distance. The four shape parameters (50% volumetric diameter, aspect, roundness and reflectivity) arc used for morphological analysis of wear particles. The results showed that the four shape parameters of wear particles depend on a kind of the lubricating materials. It was capable of calculating presumed wear volume for three kinds of mate-rials on driving time to foresee a damage condition of lubricating materials.

제주 차귀도 연안해역 미생물 분포 및 이화학적 특성

문영건,김만철,이준백,송춘복,여인규,김종만,박근태,손홍주,최우봉,허문수 한국환경과학회 2006 한국환경과학회지 Vol.15 No.3

인산농도에 따른 치질의 미세누출 효과

문주훈,조영곤,김병태 大韓齒科保存學會 1996 Restorative Dentistry & Endodontics Vol.21 No.2

영도구 지역의제사업 추진을 위한 모범적 방안과 장기적 전망

문태영,주승철 고신대학교 영도발전연구소 2001 영도연구 Vol.3 No.-

The local agenda 21 is at the beginning stage at the district of the islet Youngdo in Busan metropolitan city. Some important points should be considered when the district government carries on the local agenda 21. Although it is important to produce a concrete document for local agenda, before the district government pushes for the visible result in administration, the district government should wait and encourage the community to build up the capacity in social and environmental movement. Local enterprises and citizens are equally important components to process local agenda 21 with the district government. Also the individual agenda should be drawn carefully in premise of practical application by and for community, rather than for impractical but fashionable sentences. Several steps and perspectives were discussed and provided as a modest model for the district government to benchmark between practice and model.

肝내 알데히드 탈수소효소 활성의 변동

문전옥,김태완,백기주,김기헌 부산대학교 신약개발연구소 1994 藥學硏究誌 Vol.28 No.1

It was reported that hepatic aldehyde dehydrogenase(ALDH) activity was depressed in alcoholic liver diseases, however there was few report that explain the reason of depressed ALDH activity. We have attempted to correlate the decrease of hepatic ALDH activity with the active oxygen species which generated at elevated rates in the proliferated microsomes by chronic ethanol feeding. The susceptibilities of the hepatic ALDH activity to active oxygen generated by xanthine-xanthine oxidase system and FeSO₄-H₂O₂ system were studied. Incubation of ALDH with 2×10³ xanthine oxidase for 30 min at 25℃ resulted in the decrease of enzyme activity to 60%, and 55% of ALDH activity was retained after exposure to FeSO₄4-H₂O₂ system for 20 min. Alteration in the ALDH activity after administration of ethanol in rat liver was investigated. Whereas the mitochodrial ALDH activity was increased, the microsomal activity was depressed in ethanol-treated rat. Induced microsomal ALDH activity was observed by treatment of phenobarbital or 3-methylcholanthrene in the liver of rats chronically fed alcohol. Since the ALDH catalyses the oxidation of a wide variety of aliphatic and aromatic aldehydes, it is suggested that the alteration in the ALDH activity by various factors including the active oxygen affects the physiological states of liver administrated ethanol chronically, which may in turn to lead to liver disease.

濾過法에 있어서 濾材(송이) 크기에 따른 褐藻類 抽出 廢水의 處理效果

姜永周,李民圭,吳泰文 제주대학교 1990 논문집 Vol.30 No.-

Efficient utilization of the scoria which are naturally abundant in parasitic volcano area of Cheju-do was tried to be linked with purification of the waste water contaminiating environment. A packed column for waste treatment was manufactured using scoria as medium, and the used waste water was the extract of a brown alga (Ecklonia cava) which is a raw material of sodium alginate. In this study the removal efficiency of suspended solid(SS), biological oxygen demand(BOD), and chemical oxygen demand(COD) was investigated under different conditions of medium size and operation time, The following results were obtained. 1. The smaller size of the medium gave the higher efficiency of water treatment. 2. The removal efficiency of SS was higher than that of BOD or COD at specific medium size. 3. The scoria was more effective on the removal of undissolved solid than dissolved one. 4. Filtration ability of the packed column was not decreased even after 5 day' continuous operation

HPLC를 이용한 백삼,홍삼,홍삼농축액의 유리당 성분 및 함량 확인

맹주양;이용구;이숙재;정진아;황규찬;김태희;문용현 순천향대학교 기초과학연구소 2010 순천향자연과학연구 논문집 Vol.16 No.2

Free sugars-Fructose, Glucose, Sucrose, Maltose-were isolated from white ginseng, red ginseng, and red ginseng concentrate by HPLC. The results for the content of sugar was as follows: in white ginseng, Sucrose(30.70ppm) > Maltose (7.45ppm) > Fructose(0.42ppm) > Glucose(0.22ppm), in red ginseng, Maltose(33.65ppm) > Sucrose(8.84ppm) > Fructose (0.81ppm) > Glucose(0.43ppm), and in red ginseng concentrate, Sucrose(14.12ppm) > Fructose(9.23ppm) > Maltose(6.86ppm) > Glucose(5.87ppm). Overall results suggest that, in the contents of sugar, monosaccharide(Glucose) is lowest and disaccharide(Sucrose, Maltose) is highest, in all of ginseng.

선각 평블록 조립공장 일정계획을 위한 혼합 유전 알고리즘

하태룡,문치웅,주철민,박주철 한국경영과학회 2000 經營 科學 Vol.17 No.1

This paper describes a scheduling problem of the panel block assembly shop in a shipbuilding industry Because the shipbuilding is a labor intensive industry, the most important consideration in a panel block assembly shop is the workload balancing, which balances man-hour, weight and welding length and so on it should be determined assembly schedule and workstation considering a daily load balancing and a workstation load balancing simultaneously To solve the problem, we develop a hybrid genetic algorithm Hybrid genetic algorithm proposed in this paper consists of two phases The first phase uses the heuristic method to find a initial feasible solution which provides a useful information about optimal solution The second phase proposes the genetic algorithm to derive the optimal solution with the initial population consisting of feasible solutions based on the initial solution Finally, we carried out computational experiments for this load balancing problem, which indicate that developed method is effective for finding good solutions