• Journal of Nuclear Fuel Cycle and Waste Technology(JNFCWT)
• /
• v.6 no.2
• /
• pp.141-145
• /
• 2008

Due to the uncertainties resulting from cost projection, evaluation over long term period, and adequacy of applied discount rate, the economic assessment for back-end fuel cycle is different from each organizations or individuals. In this paper, the features and limitations of some noticeable economic evaluations were investigated and analysed to contribute for the public participation and back-end fuel cycle policy related researches. As a result of analysis, we found that the reprocess and recycling is more economical than direct disposal option, but the result includes high uncertainty that depends on the input parameters.

• Proceedings of the Korean Society of Computer Information Conference
• /
• 2018.07a
• /
• pp.419-420
• /
• 2018

컴퓨팅 기술은 가상화와 분산처리 기술을 기반으로 인터넷을 통해 IT자원을 사용한 만큼의 요금을 지불하는 클라우드 컴퓨팅 기술로 발전되고 있다. pc의 성능도 고성능 서버에서나 사용되었던 데이터베이스 운용이나 업무처리를 수행할 수 있는 단계로 발전하였다. 이에 따라 정보시스템을 업무의 지속성 유지를 위해 pc에서 정보 시스템이 운용되도록 설계하였다. pc를 이용한 정보시스템은 업무의 지속성을 유지할 수 있지만 데이터에 대한 정보보호는 매우 미흡한 환경이다. 본 논문은 pc를 이용한 정보시스템에서 정보보호의 이론적 내용을 고찰하고 데이터를 안전성 있게 보호할 수 있도록 파이썬을 활용한 정보보호 시스템 설계를 연구하였다.

• (The) Korean Journal of Advertising
• /
• v.27 no.4
• /
• pp.71-90
• /
• 2016

Managers of firms often wonder whether advertising expenditure is a mere expense or an investment with foreseeable future returns. When top management makes a decision on the level of advertising expense, it must consider whether an increase in advertising spending will positively affect brand loyalty and the increased brand loyalty will positively affect profitability and firm value. We investigate the industry-specific effects of advertising spending on marketing and the effect of loyalty on financial performances using top companies in Korea, specifically, 184 firms' data from year 1998 to 2014. The empirical results of a fixed effect model indicate that the effects of advertising on customer satisfaction index and loyalty on the firms' financial performance are positive. In service industry, unlike manufacturing industry, advertising has a significantly positive effect Brand Loyalty. In addition, Brand Loyalty had positive impacts on ROA and ROE as profitability index, and Tobin's q, a market-value index. The research results suggest that advertising in service industry should be considered as customer satisfaction investment and the increased Brand Loyalty as a profit for present and a business investment for the future respectively.

• Journal of the Korean Society for Marine Environment & Energy
• /
• v.4 no.3
• /
• pp.40-52
• /
• 2001

Using a biochemical indicator, the effects of fecal pollution in the estuary of the Nakdong river and in the Chinhae Hay were investigated from summer to winter in 1997-1998. The biochemical indicator used in this study was coprostanol (5-cholestan-3-ol) which is a kind of fecal sterol. It is a useful tracer of fecal pollution, as it is only found in feces of mammals including humans. Coprostanol was less affected by surrounding environments than other indicators of fecal pollution such as fecal coliform or ammonium and was proved to be a good indicator of fecal pollution. Therefore, long-term observations of coprostanol and related compounds could be used as useful indicators for the effects of feces on marine environments and ecosystems.

• Proceedings of the KAIS Fall Conference
• /
• 2008.11a
• /
• pp.465-468
• /
• 2008

현재 가장 범용적으로 사용되는 미생물 배양 용기인 Petri Dish는 배지 제조 후 냉장과 실온 보관 시수분 증발에 대한 보호 효과가 적어 세 달 이상 보관하기 어려운 단점이 있어 즉시 사용 배지(pre-plated media) 개발에 장애가 되고 있다. 본 연구는 미생물 배지의 장기 저장이 가능하도록 고안된 LOP plate의 수분 보호능에 관한 것으로, LB 배지를 표준 배지로 해서 4, 25, 32 및 $37^{\circ}C$ 네 개의 온도영역과 진공 포장 및 비 포장 조건에서 Petri Dish와 비교한 결과, 각 온도 조건별로 LOP의 탁월한 수분 보호능을 확인 할 수 있었다. 따라서 향후 LOP를 이용한 장기 저장과 즉시 사용이 가능한 pre-plated media와 관련된 제품 개발이 가능할 것으로 기대된다.

• Journal of Korean Society of Steel Construction
• /
• v.16 no.4 s.71
• /
• pp.415-423
• /
• 2004

To investigate the long-term corrosion resistance of an uncoated weathering steel, an important outdoor constructional steel material, skyward surfaces of the weathering steel and a control steel initially exposed to rural and industrial atmospheres for 9 years were electrochemically tested in neutral artificial rain in terms of electrochemical potentials, impedances, and anodic potentiodynamic polarization curves. Their results were then discussed. A quite passive and stable rust layer to the artificial rain was well formed on the skyward surface of the weathering steel exposed to the industrial and rural atmospheres, and its corrosion rate in the artificial rain was measured to be about a low $3{{\mu}m}/y$. Continuous immersion of all the weathered surfaces in the artificial rain revealed the gradual degradation of the weathered corrosion layers on the steel, resulting in a cathodically controlled corrosion of the substrate steel by the electrochemical measurements. Alloy components of the weathering steel were found to retard the degradation of the weathered corrosion layers on the steel in the artificial rain. For better corrosion evaluation of the weathering steel, more electrochemical measurements of surfaces that have been exposed for more than 9 years to more closely simulated atmospheric waters are needed. These measurements are almost non-destructive and can provide online and in situ information on the corrosion rate, the development of corrosion and the conditions of rust layers on any interested surface and at any exposure time of the steel, so they can be effectively applicable to the corrosion evaluation of steel structures such as bridges, towers, and architectures by forming an electrochemical cell on an interested structural surface and by using a portable electrochemical instrument.

• Information Systems Review
• /
• v.10 no.3
• /
• pp.21-38
• /
• 2008

After the introduction stage, Korean mobile game market is approaching to the growing stage leading mobile contents market. The environment for the mobile contents business is getting better by the expansion of the 3G mobile networks and the enhancement of the mobile devices. In this research, at a content level, not a service level, market success factors of mobile games and the differences by genres and their changes over time were investigated through the analysis of the real market data of mobile games launched by a Korean mobile carrier. The most important factors for market success, especially for the genres of RPG/Tycoon/Simulation and Shooting/Action/Arcade, were found to be the 'design' factor and its effect turned to be getting stronger as time goes by after the launch. Consumers' purchase rate was actually higher for the mobile games of popular genres or in relation with socially popular subject matters. Also 'design' and 'creativity' factors which are related to the quality of contents, have gotten more important over time. One of the most interesting results was that there existed a "blue ocean" genres like Sports/Racing/Leisure which had a steady demand but not many competing games. In the analysis of the 'convenience' factor, one interesting implication for mobile game producers was that there exists a trade off between the ease of initial adoption and the steady sales of a mobile game.

• Journal of the Korea Concrete Institute
• /
• v.20 no.3
• /
• pp.283-290
• /
• 2008

The repair technique using surface impregnation of reactive compound is so effective for deteriorated concrete structures that many researches are recently focused on these works. Particularly, inorganic impregnant is regarded as ecofriendly material because there is no air-pollution during manufacturing process as well as field coating works. Furthermore, The delamination between old concrete and impregnated surface does not occur, resulting from different material characteristics. In order to evaluate the durability performance of surface-impregnated concrete, durability evaluation through the long-term exposure tests is significant, however, experiments are usually limited to the temporary and qualitative laboratorial scope. In this study, durability characteristics for inorganic and organic/inorganic impregnated concrete specimens are evaluated through longterm chloride exposure test. The specimens with 21MPa and 34MPa strength have been prepared and exposed to chloride attack in the atmospheric, tidal, and submerged conditions. Evaluation for compressive strength, chloride penetration, and electrical potential (half cell potential) for steel corrosion are performed for the specimens exposed for 2 years. From the results, no distinct strength gaining is observed but the resistance to chloride penetration and steel corrosion is evaluated to be improved through surface impregnation. The more improved resistance to chloride attack is measured in the inorganic impregnated concrete and the results from atmospheric condition show more improved resistance to chloride attack than those from submerged and tidal condition.

• Journal of the Korean Geotechnical Society
• /
• v.37 no.8
• /
• pp.25-35
• /
• 2021

Recently, the ground anchor method is commonly applied with nail and rock bolt to secure the stability of slopes and structures in Korea. Among them, permanent anchor which is used for long-term stability should secure bearing capacity and durability during the period of use. However, according to recent studies, phenomenon such as deformation to slope and the reduction of residual tensile load over time have been reported along the long-term behavior of the anchors. These problems of reducing residual tensile load are expected to increase in the future, which will inevitably lead to problems such as increasing maintenance costs. In this study, we identified the factors that affect the tensile load of permanent anchor from a literature study on the domestic and foreign, and investigated the prior studies that analyzed previously conducted load cell monitoring data. Afterwards, using this as basic data, the load cell measurement data collected at the actual site were analyzed to identify the tensile load reduction status of anchors, and the long-term load reduction characteristics were analyzed. Finally, by aggregating the preceding results, proposed a technique to predict the long-term load reduction characteristics of permanent anchors through short-term data to around 100 days after installation.

• Asia Marketing Journal
• /
• v.1 no.2
• /
• pp.100-115
• /
• 1999

본 연구는 기업이 기술제품을 도입한 후에 내부에 확산시키려고 하는 실행단계에서 직면하는 혁신저항에 영향을 미치는 요인과 혁신저항을 줄이고 확산을 증진시키는 확산촉진활동을 설명하여 2B 마케팅 상황에서 기술제품의 조직내 혁신저항-확산모델을 도출하였다. 기업에서 기술제품을 조직내에 확산시킬 때는 구성원들의 혁신저항을 접하게 된다. 소비자 행동에서는 혁신저항에 영향을 주는 변수로 개인변수와 제품변수를 제시하고 있지만 2B 마케팅에서는 조직구조변수와 구매센터변수가 추가적으로 영향을 주게 된다. 중앙집권화, 공식화정도가 높은 기업에서는 구성원들이 혁신저항을 가지면서도 사용할 수 있다. 이러한 경우에는 판매기업과 구매기업의 관계가 단기적인 관계로만 그칠 수 있다. 또한 구매센터 참여정도가 적고 구매센터가 집중화되어 있으면 혁신저항이 커지고 단기적인 관계만 형성될 가능성이 커진다. 그리고 제품의 지각된 위험, 적합성에 따라 혁신저항의 정도가 달라질 것이다. 그리고 사용자 개인의 지각된 자기능력, 현 제품의 만족도 등이 의미있는 조절 변수 역할을 할 것이다. 그러므로 장기적인 관계로 이어지기 위해서는 혁신저항을 줄이는 교육훈련, 제품개선, 부서간 조정, 개인적 동기 부여와 같은 확산촉진활동이 있어야 한다. 따라서 본 연구를 통해 판매기업과 경영자들은 기술제품에 대한 혁신저항을 극복하고 제품을 확산시킬 수 있는 학문적, 관리적 시사점을 얻을 수 있을 것이다.