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컨테이너 검색기 이송대차 추진용 선형 유도전동기의 2차측 리액션플레이트 재질에 따른 특성 연구
정재훈(Jae-Hoon Jeong),최장영(Jang-Young Choi),성소영(So-Young Sung),박종원(Jong-Won Park),임재원(Jaewon Lim) 대한전기학회 2016 전기학회논문지 Vol.65 No.1
This paper presents the analysis of the analysis of thrust characteristics of linear induction motors(LIMs) according to secondary reaction plate. LIMs are well known as high speed transport systems, which can obtain thrust directly without gears and links, or auxiliary mechanisms. A simple structure, easy maintenance, and less environmental pollution are advantages of LIMs. In transport systems using LIMs, the secondary reaction plate is an important design factor, because it has considerable impact on the cost of the railway as well as the performance of the LIMs. This paper deals analyzed the characteristics of linear induction motor used for moving the vehicle of container scanner. Thrust, efficiency and load characteristic were interpreted with FEM regarding two models whose material of secondary reaction plate was copper and aluminum. It suggested the interpretation of thrust, efficiency and power factor characteristic along slip and compared the operation ability of linear induction motor through characteristics analysis along the load.
Extension of Lance Life by Change of Height of Lances in the Smelting Furnace of Mitsubishi Process
Sung‑Mi Lim,Soo‑Sang Park,Kyung‑Woo Yi 대한금속·재료학회 2021 METALS AND MATERIALS International Vol.27 No.10
A Mitsubishi process, which pertains to continuous Cu production, involves a smelting furnace, cleaning furnace, and convertingfurnace connected in series. One of the main issues pertaining to the smelting furnace is the frequent interruption ofoperations required to allow the inspection and replacement of lances, because lances are frequently fractured. The presentstudy was aimed at modifying the operating conditions of the smelting furnace to suppress lance fractures. A numericalmodel was developed to simulate the transport phenomena in the furnace, including multi-phase behaviors. The simulationresults showed that the lances were exposed to a severely erosive atmosphere with high temperatures. Further calculationindicated that raising the positions of the lances could lower the temperature of the lances, and reducing the occurrence ofsplashed melt, which contains erosive sulfides. The smelting furnace was operated under the conditions of the raised lanceheight and attentively monitored for several months. It was confirmed that by implementing such a change of the lanceheights, the occurrence of lance failures has been considerably reduced without notably affecting the reaction ability of thesmelting furnace.
Sung‑Soo Kim,Sangyeob Lim,Dong‑Hyun Ahn,Gyeong‑Geun Lee,Kunok Chang 대한금속·재료학회 2019 METALS AND MATERIALS International Vol.25 No.4
We analyzed the microstructural characteristics such as number density and length and width of hydrides in Zr–2.5 wt%Nbpressure tube. The hydrogen was charged cathodically and the hydride-contained sample was evaluated using the advancedanalysis methodologies. We performed a diff erential scanning calorimetry analysis to more quantitatively understand thethermodynamics of the hydride formation/growth process. We characterized the micrograph of hydride-contained Zr samplesto estimate the microstructural characteristics of the matrix and hydrides. We investigated eff ects of hydrogen concentrationand microstructure of matrix on determining microstructural measures of the hydrides. Particularly, we found that β phasein the matrix becomes isolated during the heat treatment same or above 475 °C and this change increases the inhomogeneousnucleation sites signifi cantly. We claim that the microstructure change of this matrix phase greatly increases the numberdensity of hydride.
Lim,Hyun-Sung,Yoon,Tae-Gyeong 한국통합사례관리학회 2021 한국케어매니지먼트연구 Vol.- No.38
This study s purpose was to examine the impact of loneliness, and two types of social support(functional and structural) on the suicidal ideation among elderly living alone. About 254 research participants were recruited from Seoul City and other cities in Gyeonggi-do and finished the questionnaires of loneliness, perceived social support, structural social support, and the suicidal ideation. Data were entered into multiple regression analyses. The finding of this research study indicates that loneliness was an important predictor for suicidal ideation. Thus, increased loneliness was associated with a high level of the suicidal ideation. This research study result showed a moderating effect of functional social support. However, structural social support did not moderate relationship between loneliness and suicidal ideation. This research study would provide implications for social work practices.
Lim,Sung-Mook,Jung,Ki-Chang,Kim,Eung-Sik,Kim,Hong 한국화재소방학회 1997 한국화재소방학회 학술대회 논문집 Vol.1997 No.-
In this work, a new type of UV flame detection system was developed. In order to measure the performance of UV flame detector, various kinds of experiments was performed. The results show that the maximum response time of the UV flame detector is 0.2 seconds when the detection distance is one meter The advantages of this system include wide area, high speed response and high sensitivity. After testing the W flame detector in engine compartment it detected fire within 0.09 seconds and extinguished within 5 seconds. Hence, the UV flame detector can be applied in automatic fire suppression system for automobiles.
Copper Penetration of a Lance in a Smelting Furnace of the Mitsubishi Process
Sung‑Mi Lim,Kyung‑Woo Yi 대한금속·재료학회 2022 METALS AND MATERIALS International Vol.28 No.4
This study was aimed to determine the main cause of lance fracture in a smelting furnace of the Mitsubishi continuous processfor Cu production. Investigation of lances used in field operations, thermodynamic analysis and laboratory experiments wereconducted. By analyzing the lances, damaged surface of the lances and penetration of matte components into the lance wereobserved. The depth of damage was strongly dependent on the lance height which was related to temperature. To determinethe temperature of the lance fracture, thermodynamics calculations and laboratory experiments were conducted. Both resultsshowed that the formation of Cu liquids above 1100 °C could be the main cause of lance fracture during operation of Cusmelting furnaces of the Mitsubishi process.
Improved Micropropagation of Root Chicory, Cichorium intybus L. var. sativus.
Lim,Jung-Dae,Yang,Deok-Chun,Lee,Hyeon-Yong,Kim,Jong-Dai,Lee,Jin-Ha,Sung,Eun-Soo,Yu Chang-Yeon 한국자원식물학회 2004 Plant Resources Vol.7 No.1
The establishment of an efficient protocol for plant regeneration and micropropagation from leaf explant cultures of Chicory, Cichorium intybus L. var. sativus. is reported. Callus formation rate appeared 100% from explant in all growth regulators, but calli formed in the prensence of naphthaleneacetic acid (NAA) were appeared very compact and non-embryogenic state. The regenerated shoots were obtained from leaf explant cultures on solid MS medium containing different concentrations of cytokinins and auxin. The highest number of shoots (5.7) per explant and shoot growth (2.8cm) was obtained on MS medium containing 0.1 mg BAP L^-1 and 0.1 mg NAA L^-1. Indole acetic acid was the most suitable auxin for root formation among three auxins tested. 2,4-D had no effect on shoot and root formation.
임상선(Lim, Sang-sun) 한국사학사학회 2004 韓國史學史學報 Vol.0 No.10
Balhaethaejogeongukji which was written by Park eun-sik in 1911 has many meanings in Balhae(渤海) history. Above all Balhaethaejogeongukji is the first book that dealt with Balhae history after the practical science period. This book means on the subject of the establishment of Balhaethaejo but also really described the whole Balhae history from the founding to the early 9th century. And this book dealt with various fields which included politics, society, culture, customs, diplomacy, geography and so on in the whole Balhae history. Second in the situation that had national rights taken away under the rule of Japanese imperialism Balhaethaejogeongukji studied the whole Balhae history with Koguryo(高句麗) which was an extension of noticing Manju(滿洲) area for life and an independence movement. Park eun-sik told it was important that we knew our history to recover our race and nation and the system followed Dangunchosun(檀君朝鮮), Koguryo and Balhae.Third it is different that Park eun-sik described the whole Balhae history on a survey on the other hand Chin chae-ho(申采浩)'s description about Balhae stayed the step on the theory of knowledge. It is a lot of analogous contents between Chin chae-ho's Doksasinron(讀史新論) was published in 1908 previous Park eun-sik and Park eun-sik's Balhaethaejogeongukji. Finally understanding Balhae history of Park eun-sik succeeded to previous realist and affected the study about Balhae history of contemporary and after nationalism historians greatly. Recognizing Nambukjo(南北朝) of Balhae and Shira(新羅) was affected by Yu dekgong(柳得恭), Kim jeng-ho(金正浩) and Kim taek-young(金澤榮). Men who recognized and emphasized that Balhae acceded to Koguryo and had great importance in Korean history were Yu dek-gong, Kim taek-young, Jang ji-yeon(張志淵), Chin chae-ho and so on. And Park eun-sik exerted great influence on recognizing Balhae of Shin gyu-sik(申圭植), Jang do-bin (張道斌), Kwon duk-gyu(權悳奎), Hwang ui-don(黃義敦) and Kim sang-gi(金庠基) after Balhaethaejogeongukji.