CMP 실리카 슬러리 노화 현상에 대한 연구

이우선,최권우,고필주,서용진 조선대학교 에너지.자원신기술연구소 2003 에너지·자원신기술연구소 논문지 Vol.25 No.1

As the integrated circuit device shrinks to the smaller dimension, the chemical mechanical polishing (CMP) process was required for the global planarization of inter-metal dielectric (IMD) layer with free-defect. However, as the IMD layer gets thinner, micro-scratches are becoming as major defects. Micro-scratches are generated by agglomerated slurry, solidified and attached slurry in pipe line of slurry supply system. It is well known that the presence of hard and larger size particles in the CMP slurries increases the defect density and surface roughness of the polished wafers. In this paper, we have studied aging effect the of CMP slurry as a function of particle size. We prepared and compared the self-developed silica slurry by adding of abrasives before and after annealing. As our preliminary experiment results, we could be obtained the relatively stable slurry characteristics comparable to original silica slurry in the slurry aging effect.

논의과정 활용 수업이 초등학생의 학습 동기와 과학태도와 미치는 영향

이하룡,남경희,문성배,김용권,이석희 한국초등과학교육학회 2005 초등과학교육 Vol.24 No.2

The purpose of this study is to examine the effects of science instruction using argumentation, with Tolumin's structure of argument, on students' learning motivation and scientific attitude. In the instruction, well-structured problems selected to be argument, in which interactions among students are stressed. The subjects were classified into two groups: One group is composed of sixty-seven students (experimental group) who were participated in solving processes of the scientific argument tasks, and the other is composed of sixty-nine students (comparative group) who were participated in the traditional teaching method. The results of this study implied that experimental group has a positive effect on students' learning motivation and scientific attitude.

제 6·7차 교육과정 초등학교 과학과 교과서 3,4학년의 물질영역 비교 분석 : Matter Domain

김용권,이하룡 부산교육대학교 과학교육연구소 2000 科學敎育硏究 Vol.25 No.-

The Study was intended to suggest the desirable direction in the 7th national curriculum revision through the analysis and comparison of the elementary science textbooks in the 6th & 7th national curriculum. The conclusions of the study with changes of contents and questions of statement of the elementary science textbooks are as follows. First, the portion of inquiry process domain decreased a little but the portion of cognitive domain increased. This cause is a essentially factor in science that will be not separated to two aspects with knowledge and inquiry process. Second, this in increased step by step a observing, defining a operating, a recording, and a transmissing in 6th national curriculum, specially this is worth notice that make rapid increased a prodicting and a infering but decreased a controlling variables and a interpreting data. Third, this is shown that small an index of I.S.I. at analysing question in the 7th national curriculum. This fact is shown that indicated a defect of the elementary science textbooks in the 7th national curriculum.

우리나라 도시와 농촌 지역 주민의 혈중 연 및 혈중 Zinc Protoporphyrin농도 비교 연구

김준연,김병권,홍영습,이용언,정갑열 동아대학교 부설 산업의학연구소 1997 산업의학연구소 논총 Vol.- No.3

The study was carried out on healthy population in urban and rural area, in order to compare the level of blood lead (PbB) and blood zinc protoporphyrin (ZPP) between the population living in each area from July 1 1994 to December 31 1994. We stratificated the results with sex, age and area. The results obtained were as follows; 1. In urban area, overall mean of the PbB level was 7.08±1.61㎍/dl and both men and women had the highest level of PbB, which were 8.15±0.85㎍/dl, 6.90±1.48㎍/dl, in less than 39 years old group. In rural area, overall mean of the PbB level was 6.75±1.61㎍/dl and both men and women had the highest levels of PbB, which were 7.25±2.29㎍/dl, 7.00±2.92㎍/dl in 40∼49 years old group. And there was statistically significant difference between mean of the men's PbB level in urban area and that in rural area (p<0.05). 2. In urban area, overall mean of the ZPP level was 32.08±8.28㎍/dl and men had the highest level of ZPP, which was 29.59±5.13㎍/dl, in 40∼49 years old group, and women had that, which was 36.83±7.95㎍/dl, in less than 39 years old group. In rural area, overall mean of the ZPP level was 34.54±11.31㎍/dl and men had the highest level of ZPP, which was 32.10±5.45㎍/dl, in less than 39 years old group and women had that, which was 40.17±14.02㎍/dl, in 40∼49 years old group. And there was statistically significant difference between mean of the men's ZPP level in urban area and that in rural area (p<0.05). 3. There was statistically significant difference in PbB and ZPP between men and women group in both area (p<0.05) but not significant among age group in both area (p>0.05).

무증상 대퇴골두 무혈성 괴사의 증상발현

원중희,김용민,최의성,이호승,서중배,배병권 대한고관절학회 2001 Hip and Pelvis Vol.13 No.1

교육대학원에 있어서 초등 과학교육 영역의 중요성과 그 운영방안

오진태,옥치율,한영욱,이형철,김용권,임채성 釜山敎育大學校 1994 부산교육대학 논문집 Vol.30 No.1

The future society is expected to be rapidly change in all areas, that is, the length of change time is becoming much smaller than that of generation time. It is very important to prepare the citizens who possess scientific literacy which actively cope with the rapid changes and specialization of society. The sources of rapid changes may be due to the developments in science and technology. Therefore, the importance of science education will be increasingly high. Scientific literacy should be improved basically and systematically from the early stages of formal education. Teachers who are responsible to educate children should be able to research in the areas of science education as well as science itself, and to have capacity to transmit them to the classroom. To do this, the graduate course and the science education within the system beyond the level of college education are essential parts of teacher education. In the graduate course, it is important that science itself and pedagogy of science should be balanced.

Helicobacter pylori 제균치료에 Rebamipide (Mucosta) 의 유용성

이재동,이문호,이강문,남승우,안병민,이동수,정현용,정일권,노임환 대한소화기내시경학회 2000 Clinical Endoscopy Vol.21 No.5

Bakground/Aims: Eradication of Helicobacter pylori infection is highly efficacious in preventing the recurrence of peptic ulcer. Rebamipide (Mucosta) is known to have the ability to inhibit neutrophil activity, to reduce the production of inflammatory cytokines, to scavenge oxygen radical, and to stimulate prostaglandin production. This study was designed to evaluate the effect of rebamipide on the eradication of H. pylori, and decrease of the infilatration of inflammatory cells. Methods: Eighty two patients with gastric or duodenal ulcers with H. pylori infection were allocated to two treatment groups. The patients were treated either with omeprazole 40 mg, clarithromycin 1.0 g, amoxicillin 2.0 g, rebamipide 300 mg (OCAR group) or omeprazole 40 mg, clarithromycin 1.0 g, amoxicillin 2.0 g (OCA group) for two weeks. Results: H. pylori was eradicated 56 out of 62 patients (90%) in OCAR group and 16 out of 20 patients (80%) in OCA group. The infiltration of inflammatory cells decreased in both treatment groups. No significant side effects had been noticed. Conclusions: The results of the present study suggest that rebamipide may be useful to decrease gastric mucosal inflammation in peptic ulcer disease. However, further detailed study will be reqiured to determine the potentially beneficial effect whether rebamipide can prevent the recurrence of peptic ulcer diseases with H. pylori infection.

정상적인 부모에서 산전초음파로 진단된 Holt-Oram 증후군 1 예

이용희,이정건,이정노,이숙환,최안나,지은경,권태희,조주연,정창조,계정웅 대한산부인과학회 2000 Obstetrics & Gynecology Science Vol.43 No.11

Holt-Oram Syndrome is an autosomal dominant disorder characterized by the association of upper-limb abnormalities and congenital heart disease. A woman with no family history of genetic disease underwent antenatal sonography at 27 weeks' menstrual age to screen for fetal anomalies. Ultrasonography revealed abnormalities in the upper limbs. The limb abnormalities included abscence of bilateral thumbs and radius: the left humus was short. Pregnancy termination was performed. The postnatal chromosomal analysis revealed a normal 46XX karyotype and the autopsy finding confirmed the Holt-Oram syndrome. We report a case of Holt-Oram Syndrome in fetus with unaffected parents with brief of the literatures.

Development of a Systematic Quality Control Program for Point-of-Care Glucose Testing

Yong Hun Jo,Sooin Choi,Jae Joon Lee,Jeong Gwon Kim,Yong-Wha Lee 대한임상검사정도관리협회 2023 Journal of Laboratory Medicine And Quality Assuran Vol.45 No.3

Background: While glucose point-of-care testing (POCT) is widely utilized, it is often carried out by clinical staff who may lack specific test-related training, potentially leading to inadequate quality control (QC) procedures. This study aimed to establish a comprehensive quality management system for glucose POCT. Methods: We implemented a systematic approach encompassing quality assurance, equipment maintenance, operator training, and competency assessment in alignment with the Clinical and Laboratory Standards Institute guidelines POCT12-A3. To facilitate structured internal QC, the results of glucose POCT were automatically analyzed within the laboratory information system (LIS). An adjusted acceptable range was defined as mean±2 standard deviations (SD) based on 1 month of QC result analysis operator performance was enhanced through a tailored training program, and proficiency tests were conducted on all glucometers to assess competency. Results: Leveraging the LIS allowed the application of quality control rules to glucose POCT, enabling swift error identification and response. Analysis of one month’s QC results revealed that for high-concentration samples, the warning rate using the adjusted range was significantly higher than that using the provided range (1.1% vs. 2.7%, P <0.01). A maintenance schedule was established, encompassing monthly upkeep for glucometers and collective replacement of all QC materials every 3 months. Operator training was facilitated through both face-to-face education and instructional videos. During proficiency testing, four devices initially exhibited deviations beyond 3SD, which were subsequently rectified upon re-examination. Conclusions: The implementation of a systematic and efficient quality control system, as demonstrated in this study, holds the potential to yield accurate and dependable glucose POCT results.

Corrigendum to: Predictive Modeling for Degree of Substitution of Cellulose Acetate using Infrared Spectroscopy and Machine Learning

Yong Ju Lee(이용주),Ji Eun Lee(이지은),Jae Gyoung Gwon(권재경),Tai Ju Lee(이태주),Hyoung Jin Kim(김형진) 한국펄프·종이공학회 2023 펄프.종이기술 Vol.55 No.6