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.

저체중 또는 과체중 청소년에서 캠프 프로그램을 이용한 영양 교육효과에 관한 연구

성미경,승정자,류화춘,박재년,박동연,최미경,조경옥,최선혜,이윤신,김유경,이은주 대한지역사회영양학회 2003 대한지역사회영양학회지 Vol.8 No.4

This study was performed to evaluate the effectiveness of a nutrition education program developed for nutritionally imbalanced adolescents. A summer nutrition camp was held for 23 overweight and 16 underweight subjects. Its effectiveness with regard to was evaluated at the end of the camp and 6 months later. Nutrition knowledge, nutritional attitude, food behavior, nutrient intake, exercise habit and ideal body figures desired by the subjects. The results showed significantly higher nutrition knowledge scores at the end of the camp as compared to those obtained prior to the camp program, and these scores were maintained for at least six months. Nutrition attitude scores also improved after the education program, and these improved scores also lasted for 6 months. However, the food behavior scores measured 6 months after the education program were not significantly different from those obtained prior to the camp. Also, the exercise habit, the ideal body figures and the body figures desired by the subjects remained unchanged. When nutrient intakes of subjects were assessed before the program and 6 months later, the mean daily vitamin C intake was significantly increased after the education program. Also, the intake of iron from plant food sources increased in the overweight subjects, while less iron from animal source were consumed by the underweight subjects. Both groups tended to consume more vegetables and fruits 6 months after the education program which may have contribute to the higher vitamin C and plant-based iron intakes. These results indicate that a 4-day nutrition education camp program sustained changes in nutrition knowledge and nutrition attitude for 6 months. The increased intake of vegetables and fruits was also achieved through this education program. However, changes in dietary behavior in adolescents may require repeated education.

유아 창작음악극 활동이 유아의 창의성과 또래갈등해결 전략에 미치는 영향

공미자(Gong Mi Ja),변길희(Byon Kil Hee),심성경(Sim Sung Kyung) 한국육아지원학회 2008 육아지원연구 Vol.3 No.2

본 연구는 유아 창작음악극 활동을 고안, 실시하여 유아의 창의성 발달과 또래갈등해결 전략에 미치는 영향을 알아보는 것이다. 연구대상은 대전광역시에 위치한 K와 S유치원의 5세반 유아 각 29명이다. 유아의 창의성과 또래갈등 해결 전략을 알아보기 위하여 유아 종합 창의성 검사(전경원, 2005)와 또래갈등 해결 전략 검사(송미선, 2001)를 사용하였다. 연구 결과 유아 창작음악극 활동은 유창성, 융통성, 독창성, 상상력 등 모든 척도별 창의성과 언어, 도형, 신체 등 영역별 창의성 모두에 걸쳐 증진효과가 있었다. 또한 유아의 또래갈등해결 전략을 향상 시켰다. 즉 친사회적 전략과 자기 주장적 전략을 증진 시키며 적대적 전략과 수동적 전략을 감소시켰다. 단, 중재요청 전략에는 영향을 미치지 않았다. The effects of creating music drama was investigated with 58 of 5-year old of two kindergartens in D city. Children were divided into two groups of 29 each (14 boys and 15 girls) for the experimental and control group. Each group had identical conditions in terms of curriculum, environment and daily routines. The activities were employed during free-choice activity times for a period of 14 weeks. The creating music drama in this study was designed by researcher basing upon Yi, Hyo-Sook(2001), Yi, Hyo-Sook et al.(2004), and Sim, Sung-kyung et al.(2002). It is basically composed of planning, execution, performance․assessment, creation, and second performance․assessment using one existing music drama in a unit of 4 weeks. But the last pure creating music drama is composed of choice of the story, creation, planning, execution, and performance․assessment in a unit of 2 weeks. The Creativity Test(Jeon, Gyeong-Weon, 2005), and the Strategies in Peer Conflict Situations Test(Chung & Asher, 1996, Song, Mi-Sun, 2001) had been used. Results showed the creating music drama improved the young children's creativity. And that effects appeared in all scales(fluency/ flexibility/ imagination/ originality) and all areas(linguistic/ diagrammatic/ physical) of creativity. Also, the creating music drama improved the young children's strategies in peer conflict situations ; the pro-social strategies and the self assertional strategies increased, but the hostile strategies and the passive strategies decreased, and there was no significant change in the strategies of demanding intervention.

不確實性下에서의 最適投資決定 行態에 관한 硏究

成範鎔,安美京 홍익대학교 경영연구소 1996 경영연구 Vol.21 No.-

Mycosis Fungoides 1예 보고

지미경,양기화,김병기,심상인,김선무 大韓血液學會 1984 大韓血液學會誌 Vol.19 No.1

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.

신장의 원시성 신경외배엽 종양

송상용,조은윤,이정원,고재향,김미경,김대식,고영혜 대한병리학회 1998 Journal of Pathology and Translational Medicine Vol.32 No.3

아로마테라피 손마사지가 치핵절제술 전 환자의 불안감소에 미치는 효과

성미혜,김수진,박은혜,최경애 성인간호학회 2004 성인간호학회지 Vol.16 No.1

Purpose: The Purpose of this study was to explain the effects of aromatherapy massage on the preoperative anxiety of hemorrhoidectomy patients, and to provide the effective and holistic nursing care to them. Method: The research design was a nonequivalent control group non-synchronized design. The data were collected during the period from November 1 to November 30, 2003 at K-Hospital in Seoul. The subjects were fifty patients who were to have a hemorrhoidectomy under general anesthesia. They were assigned to two groups, 25 subjects to the experimental group and 25 subjects to the control group. The State Anxiety Inventory tool was used to measure state-anxiety on all patients the day before surgery. Systolic and diastolic blood pressure, and pulse rate were measured on the day before surgery and the preoperative period. The experimental group received aromatherapy massage on the hand with lavender oil. Data were analyzed by x^(2) test, independent t-test, paired t-test. Result: 1. Hypothesis 1, that the level of preoperative state-anxiety of the experimental group who received aromatherapy massage would be lower than that of the control group who did not received aromatherapy was supported(p=.047). 2. Hypothesis 2was that the Physiological index of the preoperative anxiety of the experimental group who received aromatherapy would be lower than that of the control group who did not received aromatherapy. The 1st subhypothesis that "the level of the preoperative systolic and diastolic blood pressure of the experimental group would be less than that of the control group" was not supported. Conclusion: Aromatherapy massage can be regarded as a partially effective nursing intervention that relives the preoperative anxiety of surgical patients and stabilizes vital signs.

일부 여대생의 스트레스와 철분 영양상태에 관한 연구

승정자,하보경,김미현,최선혜 숙명여자대학교 건강. 생활과학연구소 1999 生活科學硏究誌 Vol.14 No.1

The purpose of this study was to evaluate the iron status of 39 female adult who divided into five groups according to the stress condition. The iron status was evaluated based on dietary intake and blood analysis. The average age of the subjects was 23.10years, and the average score of BMI was 20.06kg/m2. The proportion of subjects in each stress condition was : 2.56%(1) in A1type(the group who easily get disease associated with stress), 64.10%(25) in A2type(condition susceptible to the disease associated with stress), 30.77%(12) in ABtype(middle type of A and B), 2.56%(1) in B2type(appropriate stressed condition) and 0%(0) in B1type(risk free to the disease associated with stress). The average daily intake of energy in study subjects was 2,399kcal, ti caloric ratio of carbohydrate, protein, fat was 59.90 : 14.39 : 25.71, respectively. There was no significant difference in anthropometric measurements, dietary intake status, hematologic indices of iron status between high stress group(A1type and A2type) and low stress group(ABtype and B2type). To compare the iron stores between high stress group and low stress group, subjects in each group were devided into iron 0 mg, 250 mg, 500 mg group. Stress level did not affect iron stores although in both groups, number of subjects in iron 0 mg group were higher than those of iron 250 mg and 500mg groups. Correlation coefficients between anthropometric measurements, nutrient intake status, hematologic indices of iron status and stress score of subjects did not reveal any significance. Therefore, the results suggest that psychological stress did not affect the iron status in normal female adult. However, be more systematic study on stress and the iron status is required in the future.

대두와 강낭콩이 호르몬 의존형 및 비의존형 유방암세포의 성장과 PKC 활성에 미치는 영향

성미경,오영주,박미영 숙명여자대학교 건강·사회과학연구소 2003 生活科學硏究誌 Vol.- No.18

A number of experimental and epidemiological studies have implicated that the consumption of plant foods reduces the risk of breast cancer development. Although antiestrogenic effect of estrogen-like compounds in plant foods is the most plausible mechanism involved in lowering the risk of breast cancer development, precise biochemical mechanisms and responsible components for the anticancer actions of plant foods have not been fully addressed. This study was performed to determine the effects of yellow soybeans, black soybeans and kidneybean extracts on hormone-dependent and hormone-independent human breast canter cells. Cell viability and whole cell protein kinase C (PKC) activity were determined. Methanol- or acetone-soluble fractions of soybeans and kidneybeans were incubated with hormone-dependent (MCF-7) or hormone-independent (MDA-MB-231) cells. Cell cytotoxicity was measured by MTT assay at 24, 48 and 72 hrs of incubation. Effects of these extracts on PKC activity of breast cancer cells were also measured at 72 hrs of incubation. Results indicated that both acetone- and methanol-soluble fractions of all samples with exception of kidneybean acetone fraction exerted a signif;cant cytotoxicity towards MCF-7 and MDA-MB-231 cells at all incubation time points(p<0.05). However acetone fraction(500ppm) of kidneybean stimulated cell viability of both cancer cells. At 72 hrs of incubation, acetone fractions of all three samples signircantly suppressed the 12-0-tetradecanoylphorbol 13-acetate stimulated PKC activity(p<0.05). These results indicate yellow soybeans, black soybeans and kidneybeans may contain a few compounds wirh different polarity which induce cytotoxirity in breast cancer cells. Anticarcinogenic effects of bean extracts are not necessarily depend on the presence estrogen receptors in breast cancer cells, and a pau of their activity may be mediated through che suppression of PKC activity.