Misorientation Characteristics at the Growth Front of Abnormally-Growing Goss Grains in Fe–3%Si Steel

Tae‑Young Kim,Tae‑Wook Na,Hyung‑Seok Shim,Yong‑Keun Ahn,Yong‑Kwon Jeong,Heung Nam Han,Nong‑Moon Hwang 대한금속·재료학회 2021 METALS AND MATERIALS International Vol.27 No.12

Penetrating morphologies at the growth front of abnormally-growing Goss grains in Fe–3%Si steel was examined in view ofthe possibility that they are the two-dimensional section of the solid-state wetting (SSW) along the triple junction line. Toobtain the statistically meaningful data, 102 penetrated grain and 204 penetrating abnormally-growing Goss grain morphologieswere examined. The misorientation angles of penetrating and penetrated grains were measured by electron backscattereddiffraction. Among the 102 examined penetrated grain boundaries, none has low misorientation angles less than 15°,whereas 17.2% of the 204 penetrating grain boundaries have low misorientation angles, and 23.5% of them have coincidencesite lattice boundaries. Besides, boundary energies of penetrating Goss grains, which were estimated from misorientationangles of the three grains in the penetrating morphology, satisfied the energetic condition for SSW along the triple junctionline. These results imply that the abnormal grain growth of Goss grains in Fe–3%Si steel occurs by the mechanism of subboundaryenhanced SSW.

형질전환 제초제저항성 벼 밀양 204호의 농업적 특성

정응기,이기환,원용재,박향미,전남수,최준호,구연충,한창덕,은무영,김태산,남민희 Plant molecular biology and biotechnology research 2005 Plant molecular biology and biotechnology research Vol.2005 No.

This study was conducted to investigated the major characteristics of genetically modified rice of "Milyang 204" originated from Dongjinbyeo compared to a non-transgenic rice varieties Dongjinbyeo and Junambyeo. Basta resistant transgenic rice lines carrying bar gene produced by the Yeongnam Agricultural Research Institute were evaluated for their agronomic characters. The transgenic Japonica rice of "Milyang 204" showed inferior phenotypic traits compared to a non-transgenic rice variety Dongjinbyeo and Junambyeo. On the basis of UPOV (Union Internationale Pour la Protaection des Obtentions Vegetables) and NSMO(National Seed Management Office) the transgenic "Milyang 204" showed difference in some traits out of some agronomic traits, such as leaf color, angle of flag leaf, number of spikelets, culm length, white core and white belly compared to the nontransgenic varieties rice.

이담자균 효모 Rhodosporidium toruloides에서 Rhodotorucine A에 의한 막단백질 인산화의 저해와 Trigger Peptidase의 관련성

정영기,이태호,류병호 동의대학교 기초과학연구소 1997 基礎科學硏究論文集 Vol.7 No.1

[γ-^32P]ATP was used to test phosphorylation of membrane proteins of mating type a cells of heterobasidiomycetous yeast Rhodosporidium toruloides separated by non-denaturing electrophoresis. The phosphoprotein was observed in the membrane proteins. The phosphorylation was inhibited by the pheromone rhodotorucine A (Rh. A) secreted by mating type A of the yeast. Rh. A didn't inhibit the phosphorylation in the presence of a trigger peptidase (TPase) inhibitor, antipain. Partially digested Rh. A by trypsin maintained the phosphorylation inhibitory activity. These results show that TPase activity plays an important role in the transduction of pheromone signal in the yeast.

합성하수를 이용한 금속 막의 정밀여과 특성 및 막 오염 제어

정종태,김종오,김학균,김석구,이용재 7개 국립대학교 환경연구 논문집 공동발행 위원회 2004 공업기술연구 Vol.4 No.-

This study was to evaluate the filtration performance of metal membrane with synthetic wastewater and to investigate the effective control of membrane fouling using ozone backwashing. The increase of substrate concentration caused the increase of cake layer resistance and total resistance, however, plugging resistance decreased. Total resistance of metal membrane was mainly attributed to the permeate resistance of cake layer, which was formed by deposited particles from the physico-chemical interactions of solids on membrane surface. Intermittent ozone backwashing was more effective then the air backwashing for fouling reduction. The permeation flux recovery of air backwashing decreased over 50%, however, ozone backwashing decreased less than 10% for 4 hours filtration. This may be ascribed to the degradation of foulants in pore structure by the strong oxidation of ozone and physical exfoliation of cake layer on membrane surface with backwashing.

永世中立과 集團保障

鄭用泰 淸州大學校 1972 論文集 Vol.7 No.1

분산제어 구조를 가지는 TDX-10 전전자 교환기에서 프로세서간 통신 네트워크 관리

정연쾌,우용태 國立 昌原大學校 基礎科學硏究所 1993 基礎科學硏究所論文集 Vol.4 No.-

This paper presents the structure of Inter-Processor Communication(IPC) network implemented for TDX-10 which is the large-capacity digital swiching system with distributed control being developed by ETRI. It also describes management function of the IPC network to provide reliable internal network path.

植物油의 불감화물 利用에 關한 硏究 : 第1報 Sterol과 Tocopherol의 定量 Quantitative Analysis of the Free Sterol and Tocopherol

鄭泰明,李富永,趙武濟 慶尙大學校 1972 論文集 Vol.11 No.-

米糠油, 大豆油, 참깨油, 들깨油, 산초 및 菜種油의 불감화물중에 存在하는 free sterol을 column chromatography法과 T.L.C法에 의해 分溜 定量하였고 total tocopherol에 對해서는 Emmeri-Engel法에 의해 定量하였다. 1. Free steol을 용출할 때는 n-hexane-20% benzenedyddor에서만 용출됨을 확인하였다. 2. 이들 植物油의 不??化物中에 存在한 free sterol와 total tocopherol의 含量은 다음과 같다. Free Sterol(㎍/g) Total Tocopherol(㎍/g) 米糠油 1300 490 大豆油 1500 565 참깨油 773 425 들깨油 516 635 산초油 520 740 菜種油 640 470 Free sterols contained in unsaponifiable matters of vegetable oils such as, rice bran oil, soybean oil, sesame oil, japanes pepe oil, rape seed oil. and perilla oil are determined by the column chromatographic and thin layer chromato raphic methods. And also total tocopherols are investigated by Emmerie-Engel Procedure 1. For the elution of free sterol, it is only eluted when the n-hexane-20% benzene solution were added on the column paked silica gel. 2. Quantities of free sterol and total tocopherol contained in unsaponifiable matters of these oils are as follow, Free Sterol Total Tocopherol (㎍/g) (㎍/g) Rice Bran Oil 1300 490 Soybean Oil 1500 565 Sesame Oil 773 425 Japanes Peper Oil 516 635 Rape Seed Oil 520 740 Perilla Oil 640 470

동물 뼈를 이용한 중금속처리에 관한 연구

정태섭,이재용,유재연 全北大學校 附設 都市및環境硏究所 1997 都市 및 環境硏究 Vol.12 No.1

The purpose of this study is to estimate the removal efficiency of heavy metals and reclamation of wastewater and application to field plant as a new technology development using powder and ceramic filter made lf waste hard tissue. The major crystal structure is hydroxyapatite(Ca_10(PO_4)_6(OH)_2). The rising of pH according to powder dosage was showed up to pH8.0. However, these tendencies do not showed upper pH8.0. The hard tissue powder showed the preference of removal efficiency for heavy metals in the sequence of Zn>Cd>Pb, adsorption efficiency by competition in mixed component does not showed. The removal efficiency depend upon powder quantity at mixed component shows in sequence of Cd>Zn>Pb in shortage of powder dosage, Pb>Zn>Cd in sufficient. In the treatment of single component with the variation of heavy metal concentration, the break-point was showed in 20㎎/ℓ heavy metal conc., and in mixed component 10㎎/ℓ heavy metal conc. Reuse of waste hard tissue will give profits because quantity of waste disposal will be decrease and environmental purification will be accelerated by using the ceramic filter made from the waste disposal. And we can have the hard tissue cheaply.

신경회로망을 이용한 지능형 로봇 제어 시스템 설계

정동연,김용태,한성현 경남대학교 공업기술연구소 2000 硏究論文集 Vol.18 No.-

본 논문에서는 일반적으로 고정된 위치에서 검사하는 비젼 시스템이 아닌 카메라를 로봇의 말단효파부에 장착하여 렌덤하게 움직이는 물체를 추적하여 지능적으로 매니퓰레이터의 위치 및 속도를 제어하여 정확한 위치에 납땜 작업을 한 후 비젼 검사를 실시하는 로봇 비젼 시스템을 설계한다. 자동검사를 위한 비젼기술은 실시간 실현을 위해 디지털 신호 처리기를 사용한 새로운 고성능 비젼 알고리즘을 개발해서 S사의 전자부품 조립검사라인, 즉 카메라 조립검사라인에서 라인을 따라 흘러 들어오는 백커버(Back Cover)들을 정해진 위치를 따라 로봇을 이동하여 자동 인식한다. 인식된 백커버의 납땜상태를 다양한 위치 및 이동공정에서 대해서도 유연하게 검사를 자동으로 수행하고 품질기준 통과여부를 자동 판단할 수 있는, 이른바 다공정 제품의 형상인식 및 자동검사용 로봇 비젼 기술을 개발하기 위한 연구가 수행되었다. 그리고 제안된 로봇 비젼 시스템의 성능을 컴퓨터 시뮬레이션 및 실험을 통하여 S사의 조립라인중 5번 Cell의 유사공정을 모델링하여 그에 대한 유사한 실험을 통해 그 신뢰성을 입증하고자 한다. In this paper, we have proposed a new approach to the design of robot vision system to develop the technology for the automatic test and assembling of precision mechanical and electronic parts for the factory automation. In order to perform real time implementation of the automatic assembling tasks in the complex processes, we have developed an intelligent control algorithm based-on neural networks control theory to enhance the precise motion control. Implementing of the automatic test tasks has been performed by the real-time vision algorithm based-on TMS320C31 DSPs. It distinguishes correctly the difference between the acceptable and unacceptable defective item through pattern recognition of parts by the developed vision algorithm. Finally, the performance of proposed robot vision system has been illustrated by experiment for the similar model of fifth cell among the twelve cell for automatic test and assembling in S company.

이미지 처리기법을 이용한 스캐너 용지 이송정밀도에 관한 연구

정용락,김영태,장영배 금오공과대학교 2005 論文集 Vol.26 No.-

Two different types of paper feeding methods are widely used for modem printers and scanners. One of them is the flat-bed type, which utilizes a translating camera to scan the images on a stationary sheet. The other one is the sheetfed type, which requires continuous movement of the sheet. This study involves the precision of the paper feeding mechanism of the sheetfed type, which is known to be less precise. Test sheets were generated by printing straight lines in both machine and lateral directions, forming square patterns. The test sheets were. fed into the scanner, and the machine-direction line spacing of the scanned images was analyzed. It was determined that the paper speed momentarily changed three times: when the leading edge of paper contacted the guide plate, the moment the leading edge reached the pull roller, and the instant the trailing edge departed from the push roller. It appeared that the first two speed reductions were due to buckling of the sheet, while the last one was related to the loss of pushing force. For 0.1-mm-thick paper, the variation of sheet speed due to the loss of pushing force was approximately 50 percent of the average speed, while the effect of the impact at the leading edge was less significant. However, the trends reversed with thicker 0.35-mm paper. The momentary speed reduction of the thicker paper due to the impact at the leading edge was more prominent than that due to the loss of pushing force.