• 한국신뢰성학회:학술대회논문집
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• 한국신뢰성학회 2001년도 정기학술대회
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• pp.235-238
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• 2001

It is well known that the reliability of materials of mechanical products is becoming more and more important not only for assurance of quality, but for international competition of products. In order to assure the reliability of materials or mechanical products nondestructive evaluation (NDE) techniques are playing more important roles. The existence of Internal defects in materials or mechanical parts is served as crack initiation site during the various loading condition. Historically, nondestructive evaluation (NDE) technique has been used almost exclusively for detecting microscopic discontinuities In materials or mechanical parts after they have been in service to expand the role of the NDE to include all aspects of materials production and application. Research efforts are being directed at developing and perfecting NDE techniques capable of monitoring (1) materials production processes (2) material integrity following transport, storage and fabrication and (3) the amount and rate of degradation during service. In addition, efforts are underway to develop technique capable of quantitative discontinuity sizing, permitting determination of response using fracture mechanics analysis, as well as techniques for quantitative materials characterization to replace the qualitative techniques used in the past. In this paper, the important role of NDE technology for reliability assurance of materials/mechanical parts is introduced.

• 에너지공학
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• 제29권3호
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• pp.50-56
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• 2020

Currently, 3D printing technology is a new revolutionary additive manufacturing process that can be used for making three dimensional solid objects from digital films. In 2019, this 3D printing technology spreading vigorously in production parts (57%), bridge production (39%), tooling, fixtures, jigs (37%), repair, and maintenance (38%). The applications of 3D printing are expanding to the defense, aerospace, medical field, and automobile industry. The raw materials are playing a key role in 3D printing. Various additive materials such as plastics, polymers, resins, steel, and metals are used for 3D printing to create a variety of designs. The main advantage of the green cement for 3D printing is to enhance the mechanical properties, and durability to meet the high-quality material using in construction. There are several advantages with 3D printing is a limited waste generation, eco-friendly process, economy, 20 times faster, and less time-consuming. This research article reveals that the role of green cement as an additive material for 3D printing.

• 수산경영론집
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• 제38권3호
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• pp.25-51
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• 2007

Recently those who visit a fishing village is increasing. So the government's policymaker is interested in a tourism of fishing village. There are a lot of local governments that they turn it to good account to activate the fishing community. So they plan for the tourism facility in the fishing village and invest in it. The fishery facility can playa role in it. Nonetheless it is not playing a role in tourism facility. Though the breakwaters projecting far into the sea are good waterfront, most of them are not reflecting the function of it. And fishery facility producing seed is a good resource of eco-tourism, but it is yet a tourist potential. Although the artificial reef is going far toward promoting a fishery resource, it is seldom used as a tourism resource. The multiple functions of fishery facilities have to be improved to raise the investment effect of them. Especially the tourism function has to be added on their basic function. The multiple functions of fishery facilities is necessary to satisfy tourist's needs. In results, not only their value but also value of fishing village will be raised.

• 한국도서관정보학회지
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• 제25권
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• pp.167-206
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• 1996

Some conclusions can be derived form the study : 1) The script of Japan author's name for 3 years(1960-1962, not published by the National Assembly Library but by Korea Library Association)and that of 1963's was arranged by their mother tongue although they had not the "author index". 2) "Periodical's Index" which the publication of National Assembly Library was not accept the principle that the person's name should be pronounce and script by one's mother tongue. It means that the Library was not accept the uniqueness of personal name. 3) Because the arrangement of the same person's name is mixed with one's mother tongue pronunciation and Korean one that they are scattered each another. 4) The same surname and the same Chinese character has different arrangement because of pronunciation rule of Korean language. 5) The same person's name was regarded as a different one because of nonaccurate name transcription. 6) A Japanese name was transcribed as Hangul with Korean pronunciation. 7) A Japanese name was transcribed as Hangul with Korean pronunciation and added Chinese Character in parenthesis. 8) A same Japanese name was regarded as a different one when it was transcribed with Chinese character and Hangul. 9) The arrangement of a same person's name was different when between the surname and forename has one space and has not. 10) "Author Index" is not playing as a role of name authority file.a role of name authority file.

• 한국콘텐츠학회:학술대회논문집
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• 한국콘텐츠학회 2004년도 추계 종합학술대회 논문집
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• pp.91-100
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• 2004

디지털 시대를 맞아 21세기의 가장 주목받는 산업인 문화산업 중에서도 대표적인 게임산업은 최근 어느 때보다도 관심도가 높아지고 있다. 이러한 게임산업에 있어 게임 캐릭터의 역할은 시대에 따라 많은 변화를 가져왔고, 현재 게임 캐릭터는 게임 자체의 성공여부에도 많은 영향력을 미치고 있다. 초기의 게임 캐릭터는 단순히 게임만을 위한 캐릭터로, 캐릭터 자체의 의미는 거의 없었지만 게임산업이 점차 변화를 거듭하면서 게임의 내용과 시나리오 이상으로 게임 캐릭터의 중요성이 인식되기 시작되었다. 따라서 게임의 주인공이라 할 수 있는 캐릭터의 "조형성"은 제품 간에 차별 짓는 중요 요소로서, 게임의 작품성과 상품성을 높이는데 필수적인 요인으로 작용한다.

• Journal of Korean Society for Atmospheric Environment
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• 제17권E1호
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• pp.25-33
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• 2001

This paper presents an overview of the UK Hydrocarbon Monitoring Network and summarises some of the lessons learnt from running and automated VOC monitoring network in th UK. The paper will describe the operation of the network and the Quality Control and Quality Assurance (QA/QC) procedures used to ensure that the data qality objectives are met. The provision of accurate measurements of ambient air pollutant concentrations is a valuable and high-profile service of Governments, assisting policy decisions and allowing members of the public to be well-informed. The need for such measurements has been increased in the UK by the National Air Quality Strategy and European Air Quality Directives, with the National Networks playing a central role in delivering the information. The Hydrocarbon Network provides measurements directly in support of monitoring requirements for benzene and 1,3-butadiene, and of 23 other hydrocarbon species important for their role in ozone and secondary particulate formation.

• 한국전기화학회:학술대회논문집
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• 한국전기화학회 1998년도 전지기술 심포지움
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• pp.153-166
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• 1998

Lithium ion Batteries commercially available since the early nineties in Japan are going to be more and more important for portable electronic devices and even EV applications. Today several companies around the world are working hard to join to market for Lithium secondary batteries. Based on the growing interest for commercial use of batteries also the materials have to be reviewed in order to meet large scale production needs. The requirements especially for electrolytes for lithium batteries are extremely high. The solvents and the lithium salts should be of highest purity. So the supply of these chemicals including packaging, transportation and storage but also the handling in production are critical items in this field. Frolic impurities are very critical for LiPF6 based electrolytes. The influence of water is tremendous. But also the other protic impurities like alcoholes are playing an Important role for the electrolyte quality. The reaction of these species with LiPF6 leads to formation of HF which further reacts with cathode materials (spinel) and anode. To understand the role of the protic impurities more clearly the electrolyte was doped with such compounds and was analyzed for protic impurities and HF. These results which directly show the relation between impurities and quality will be presented and discussed. In addition several investigations on different packaging materials as well as methods to analyze and handle the sensititive material will be addressed. These questions which are only partly discussed in literature so far and never been investigated systematically cover some of the key parameters for understanding of the battery chemicals. This investigation and understanding however is of major importance for scientist and engineers in the field of Lithium ion and Lithium polymer batteries.

• 정보학연구
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• 제4권2호
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• pp.155-174
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• 2001

전자상거래의 급속한 확산과 함께 주요 전자상거래 지급결제 수단인 전자화폐의 중요성이 증가하고 있다. 그러나 전자화폐의 상용화를 위한 다양한 실험이 진행되고 있으나 전자화폐의 이용은 증가하지 않고 있으며 그 주요 이유는 표준화의 미비로 인한 범용성의 미비라 할 수 있다. 특히 우리나라는 각기 다른 4개 기관의 개발을 서두르고 있어 표준화가 시급한 실정이며 법적 제도적 장치의 보완이 시급한 과제이다.

• BMB Reports
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• 제46권2호
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• pp.73-79
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• 2013

Polycystic kidney disease (PKD) is a common hereditary disorder which is characterized by fluid-filled cysts in the kidney. Mutation in either PKD1, encoding polycystin-1 (PC1), or PKD2, encoding polycystin-2 (PC2), are causative genes of PKD. Recent studies indicate that renal cilia, known as mechanosensors, detecting flow stimulation through renal tubules, have a critical function in maintaining homeostasis of renal epithelial cells. Because most proteins related to PKD are localized to renal cilia or have a function in ciliogenesis. PC1/PC2 heterodimer is localized to the cilia, playing a role in calcium channels. Also, disruptions of ciliary proteins, except for PC1 and PC2, could be involved in the induction of polycystic kidney disease. Based on these findings, various PKD mice models were produced to understand the roles of primary cilia defects in renal cyst formation. In this review, we will describe the general role of cilia in renal epithelial cells, and the relationship between ciliary defects and PKD. We also discuss mouse models of PKD related to ciliary defects based on recent studies.

• Asian Pacific Journal of Cancer Prevention
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• 제14권9호
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• pp.5089-5093
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• 2013

Objective: This study aimed to investigate the effects of BCRP expression on tumor recurrence, metastasis and treatment tolerability. Methods: A VX2 rabbit liver tumor model was established. Division was randomly into 4 groups: namely saline control group; A group, given hydration lipiodol; B group, Ad-p53; and C group, Ad-p53+hydration lipiodol. After the intervention, samples were collected to detect the BCRP, MMP-2, VEGF and PCNA. Results: The expression of BCRP, MMP-2, PCNA and VEGF in tumors in Group A had no significant difference when compared with the control group, while in B and C group, the values were significantly lower (P<0.05). BCRP positive expression in metastatic lesions significantly increased (P<0.05), and was correlated with MMP-2 ($X^2=6.172$, P=0.0131). Conclusions: BCRP may play an important role in mediating liver cancer multidrug resistance to chemotherapy, and may be correlated with tumor recurrence and metastasis, which leads to weakened treatment effect. Ad-P53 can down-regulate the expression of related genes, playing a role in multidrug resistance reversal and increased sensitivity in liver cancer treatment.