유사한 전자상태를 가지는 타이타늄 합금의 영률에 베타 안정화 원소 함량이 미치는 영향

유가영 ( Ga Young Yoo ),박찬희 ( Chan Hee Park ),홍재근 ( Jae Keun Hong ),김승언 ( Seong Eun Kim ),강남현 ( Seong Eun Kim ),염종택 ( Jong Taek Yeom ) 대한금속재료학회(구 대한금속학회) 2013 대한금속·재료학회지 Vol.51 No.4

Previously, Gum Metal (Ti-24(Nb + Ta + V)-(Zr, Hf)-O (at%)) exhibiting an ultralow Young`s modulus, ultrahigh strength and super elasticity was developed by Saito et al., who proposed that three electronic magic numbers, an average electron/atom (e/a) ratio of 4.24, an average bond order (Bo) of about 2.87, and an average “d” electron-orbital energy level (Md) of about 2.45 eV, should be satisfied simultaneously to obtain such “super” properties. The purpose of this study was to find new alloy systems possessing those properties and to examine the effect of beta equivalent content ([Mo]eq) on Young`s moduli of new alloys having the same three electronic numbers mentioned above. It was found that not only three electronic numbers but also [Mo]eq should be considered to obtain a similar Young`s modulus and hardness with respect to the Gum Metal.

경영전략과 아웃소싱의 적합 관계와 기업성과에 관한 연구

유세준,최근영 한국중소기업학회 2001 中小企業硏究 Vol.23 No.4

본 연구의 목적은 경영전략과 아웃소싱의 적합성이 기업성과에 어떠한 영향을 미치는가를 살펴보는데 있으며 구체적인 내용은 다음과 같다. 첫째, 국내 기업을 대상으로 경영전략, 아웃소싱 유형을 분석, 도출하고, 둘째, 각 유형에 따른 조직의 경영전략, 아웃소싱의 상황을 조사하여, 경영전략과 아웃소싱간의 관련성을 파악하고자 하며, 셋째, 기업 성과지표로서, 조직 유효성을 파악하여, 전략과 아웃소싱의 적합성과 기업성과는 어떠한 관계가 있는가를 살펴보았다. 본 연구는 상장제조업( 2001년, 6월말 기준) 433개 업체를 모집단으로 하여 우편조사와 방문조사를 병행하여 2001년 8월 1개월간 실시하였다. 회수된 설문서는 141개 였으며 회수율은 32.5%였다. 연구결과를 요약하면 다음과 같다. 첫째, 차별화 경영전략이 원가우위 경영전략 유형에 비하여 조직유효성으로 측정한 기업성과가 높은 것으로 나타났다. 따라서 경영전략 유형에 따라 기업성과는 영향을 받고 있다는 사실이 실증적으로 입증되었다. 둘째, 아웃소싱유형에 따라 기업성과에는 차이가 없는 것으로 나타났다. 즉, 아웃소싱 유형에 따라서 기업성과는 영향을 받지 않고 있다는 사실이 실증적으로 입증되었다고 할 수 있다. 셋째, 경영전략과 아웃소싱유형의 적합 관계에 따라 기업성과를 분석한 결과 적합한 기업은 적합하지 않은 기업보다, 조직유효성이 높은 것으로 나타났고 통계적으로 유의적인 차이가 발견되었다. 이 같은 발견은 우리에게 시사하는 바가 크다. 결국 경영전략과 아웃소싱유형의 적합관계는 장기적으로 볼 때, 기업의 수익성에도 영향을 미치고, 조직유효성에도 긍정적인 영향을 미칠 것이란 점을 유추해 볼 때, 경영전략을 감안한 탄력적인 아웃소싱 유형의 설계는 매우 중요하다는 사실을 알 수 있다. The study in the integrated approach of combining the strategy, outsourcing, and the performance attempted to accomplish the purpose of the study as follows: First, the purpose of the study was to analyze and to induce the types of the strategy of the growing firm in Korea. Second, it was to find out the relationships among the types of strategy, outsourcing, and the performance, in the process of examining the strategic situation and the outsourcing of the organization according to each type of the performance. Third, it was to find out the relationships between the adaptability of the managerial strategy and the performance of the firm, and outsourcing and the performance of the firm, in the process of identifying the effectiveness of organization. The study tried not only to analyze the relationships between the types of the strategy and outsourcing and the performances of the firm but also to identify the integrated relationship among the type of the strategy and outsourcing. In order to accomplish the purposes of the study, the study tried to measure the variables by collecting the positive data of the research questionnaire against the manufacturing firms. The measurable data returned was 141 of the respondents of the research questionnaire. The findings of the study were summarized as follows; First, the study found out the differences to the characteristics of the types of the strategy according to the environment. The characteristics of the innovational types was shown high in terms of the effectiveness. Second, the study found out no differences in terms of the effectiveness according to the characteristics of the types of the outsourcing pattern. Third, the study found out that the adaptive firm than the non-adaptive firm was shown high in terms of the effectiveness. For the effectiveness the differences was shown statistically significant. In the conclusion, the findings of the study would give a contribution to accomplish the innovation of the outsourcing system of the firm in korea.

써키트 웨이트 트레이닝이 지단백 대사에 미치는 영향

유영창,박병근 한국스포츠리서치 2004 한국 스포츠 리서치 Vol.15 No.4

The purpose of this study was to investigate the change of lipoprotein metabolism on circute weight(WCT). We had selected 24 college women-12 for the control group, 12 for the exercise group-to prove that sustaining the blood lipids, According to strength of pertinet exercise, we made the groups circuit weight training exercise and lipoprotein metabolism for 4th, 8th, 12th week. And we came to the conclusions below Lipoprotein metabolism has low LDL-C and high HDL-C(p<.001) in the exercise group, LDL-C(p<.001) is showed low and HDL-C high(p<.001) during the more duration, As a result of these has showed that blood lipids through CWT has changed at least 8weeks after, According to the results above CWT has positive effects in the blood lipids.

암의 위험요인과 예방

유근영,신해림 한국역학회 2003 Epidemiology and Health Vol.25 No.1

Cancer is one of the main cause of death worldwide. There are about 10 million new cases every year, and more than 6 million persons will die of the disease in a year. Many factors are responsible for the recent increase in cancer. Changing lifestyles, in particular as regards tobacco smoking, alcohol drinking and diet, also play a crucial part. Several different types of scientific studies contribute to identifying the causes of human cancer. IARC's prestigious series of Monographs on the Evaluation of Carcinogenic Risks to Humans publishes authoritative reports on the risks posed by potentially carcinogenic agents and exposures. Most cancers are thought to be caused by factors related to lifestyle and environment. In particular, tobacco, chronic infections and diet are involved in a substantial number of new cancers. Tobacco is responsible for about 15% of all cancers throughout the world. Chronic infections with viruses, bacteria and parasites are responsible for 16% of all cancers. It has been hypothesized that 30% of all cancers could be prevented by appropriate diet and physical activity. Other known causes of cancer, such as occupational, genetic, and reproductive factors, plays a lesser role in the global burden of cancer. Many types of cancer seem to be cluster in families, occurring more often in close relatives of affected individuals. The risks that a person inheriting a defect in a person inheriting a defect in a cancer susceptibility gene will develop a certain type of cancer must be estimated, and the role of environmental factors in modifying these risks must be ascertains. Researches into the causes of cancer has revealed how many of the most common cancers can be prevented. Detection of many forms of the disease at an early stage can greatly improve the prospects for effective treatment, reducing deaths and enhancing quality of life.

體操 吊環競技에 있어서 十字懸垂時主動筋肉에 對한 트레이닌의 效果에 관한 硏究 : Fmphasized on Muscular Strength, Electromyogram

兪承熙,崔永根,金尙國 慶熙大學校 1987 論文集 Vol.16 No.-

The purpose of the study was to find the effects of 12 weeks the straigth Body Cross on ring training program. The ten male subjects majored in gymnastics. The Criterion variable were muscular strength and electromyogram. The results are as following; 1. As for the stationary enduring time on ring, a growth was revealed from before training test M. 24.47+1.26 sec to 12 weeks training test M 3.63±1.09 sec. 2. During the stationary enduring time on ring, the mean values were 1.27±0.53 mv for the Teres, 1.14±0.34mv for the Triceps, 1.06±0.69mv for the Latissimuss, 1.02±0.43mv for the pectoralis, 0.02±0.58mv for the Biceps and 0.52±0.18 mv for the Trapezius. 3. The muscle of chiefly used in the straight Body Cross on ring were found out in the Teres, Triceps. 4. Stationary enduring time on ring was long according as it was increased of voltage for the muscle chiefly. 5. Arm strength flexion lefft right, Arm strength Extension left right, Grip strength left right and shoulder Arm strength were increased in training of 12 weeks. 6. The Correlation Coeffficient be tween stationary enduring time on ring and mucular strength per body weight were revealed as the certainly correlation.

법랑질 접착에 대한 습윤 효과

고근호,조영곤,진철희,유상훈,김종욱,박병철,기영재,최희영,김종진 大韓齒科保存學會 2004 Restorative Dentistry & Endodontics Vol.29 No.3

This study evaluated the microleakage and interfacial gap between enamel and composite resin under the dry and wet condition of the enamel surface, V shaped class 5 cavities were prepared on the occlusal portion of extracted human molars. Samples were divided into three groups: D group (air dry for 10-15s), BD group (blot dry with moist cotton pellet), and DR group (air dry for 10-15s and rewet with Aqua-Prep F for 20s). Cavities were filled using Aelitefil composite resin after applied One-Step. Microleakage was tested by 2% methylene blue dye solution and the data were statistically analysed by Kruskal-Wallis test and Mann-Whitney test. Also Enamel-resin interface was observed under SEM. Group BD showed statistically lower microleakage than group D (p〈0.05). but there was no statistically significant difference between group BD and DR (p)0.05). At the enamel-resin interface, group D showed the gap of 2 ㎛ thickness, but group BD and DR showed close adaptation. In conclusion, the use of blot dry and rewetting agent (Aqua-Prep F) resulted in decreased microleakage and improved adhesion between enamel and resin when using One-Step.

Helicobacter pylori 감염과 위선암의 발생 사이의 연관성에 관한 최근 연구 : a Review of the Literature

오소영,신애선,황승식,유근영 한국역학회 2002 Epidemiology and Health Vol.24 No.2

Purpose : Stomach cancer is a major cancer in the world as well as in Korea. Helicobacter pylori infection was suggested causing atropic gastritis, but there has been a debate on the association with the gastric adenocarcinoma. We reviewed recent literatures and meta-analyses on the association between Helicobacter pylori infection and the development of gastric adenocarcinoma. Results : The animal experiments suggested that Helicobacter pylori is a causative agent of gastric adenocarcinoma. Meta-analyses on the relationship between Helicobacter pylori infection and gastric adenocarcinoma showed increased risk in infected person, but the strength of association was varied with study design, characteristic of study participants and the nature of tumors. Conclusions : Recent study results suggested that Helicobacter pylori is a necessary causative agent for development of gastric adenocarcinoma. Assessment of the association between Helicobacter pylori infection and other related with gastric cancer risks and the effects of the eradication therapy of Helicobacter pylori infection on the prevention of gastvic cancer need further evaluation.

Piroline의 脂肪酸組成 및 Amino酸 組成에 관한 硏究

李正根,兪永鎭 건국대학교 1976 學術誌 Vol.20 No.2

This paper was conducted to analysis fatty acids and amino acids composition in raw barley, germinated barley and roots of germinated barley of piroline. Quantitative analysis of fatty acid composition of piroline were determined by gas-liquid chromatography using the mothod of methyl-esterification of the use of methoxide. Amino acid composition in piroline were determined by amino acid autoanalyzer. It was found that polyunsaturated fatty acids In piroline are all the major fatty acids obtained by GLC analysis and the essential amino acid in piroine contained more root of germinated malt than germinated barley and row barley.

Adaptive trimmed mean 필터를 이용한 영상의 과분할 방지에 관한 연구

나유찬,송창영,박형근 남서울대학교 2003 남서울대학교 논문집 Vol.9 No.-

Video segmentation is an essential part in region-based video coding and any other fields of the video processing. Among lots of methods proposed so far, the watershed method in which the region growing is performed for the gradient image can produce well-partitioned regions globally witflout any influence on local noise and extracts accurate bowndanes. But, it generates a great number of small regions, which we call over segmentation problem. Therefore we proposes that adaptive trimmed mean filter for resolving the over segmentation of image.

점증부하운동후 휴식 유형에 따른 혈중젖산농도의 변화

박병근,이정윤,유영창,김영빈 한국스포츠리서치 2004 한국 스포츠 리서치 Vol.15 No.3

The purpose or the this study is to explore the relationship between the excess post-exercise blood lactate during the restoration stage after an incremental loading exercise. Subjects of this study are 14 students enrolled in W University who do not exercise regularly, Seven of them were assigned to the group of dynamic resting and remaining 7 to that of static resting, From the analysis into the measurement, following conclusions could be drawn: The lactic acid concentration in blood after the incremental loading exercise show a significant difference depending on the types of resting and restoration stages(p<.01). That is, the lactic acid concentration appeared to be significantly low in the dynamic resting method compared to the static one from 15 minutes after the end of exercise(p<.01), Whereas, the dynamic resting method proved to be significantly faster in resting lactic acid in blood(46.85%) than the static one (29.87%)(p<.01). In summary, there was a significant difference of response in physiological variants depending on the types of resting after an incremental Loading exercise, Accordingly, more attention should be paid to the importance of cool down after exercise.