• 한국IT서비스학회:학술대회논문집
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• 2002.06a
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• pp.8-13
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• 2002

기업의 가치평가방법은 DCF법을 비롯하여 OPM, 증권거래법에 의한 본질가치평가방법, 상속세법에 의한 재산가치평가방법, 비교법, 일정성장배당모형 등 여러가지가 있다. 이중 각 평가방법은 특정한 목적을 가지고 탄생된 것이나 영리를 위한 기업의 가치를 평가하여 그 결과를 M&A나 A&D 또는 경영의 지표로 이용하려할 때 그 편파성 때문에 목적을 달성하기 어렵다. 따라서 본고에서는 그들의 균형을 취하는 평가방법을 알아보고, 장기적인 차원에서의 경영을 전제로 벤처기업자금조달과 맞물려있는 경영권 방어에 대하여 살피므로써 벤처기업인들이 안정적인 경영을 수행하거나 창업초기에 일찍 경영에 대한 분명한 목표를 설정하고 자신의 역량을 생산적인 곳에 사용할 수 있게 할 수 있는 틀을 제시해 본다.

• Current Photovoltaic Research
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• v.4 no.4
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• pp.155-158
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• 2016

Long-term stability of dye-sensitized solar cell (DSSC) module is critical for the commercialization. We investigated the effect of sealing technology on the long-term stability of the $10cm{\times}11cm$ sized DSSC modules. We applied the concept of secondary sealing to the module and then performed several stability tests such as humidity cycle, 1 sun light soaking and outdoor stability tests. The enhanced stability was confirmed for the DSSC module employing optimized sealing materials and architectures.

• KOREAN POULTRY JOURNAL
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• v.44 no.11
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• pp.150-153
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• 2012

양계업계가 장기적인 불황에 봉착해 있다. 채란업도 추석 명절을 앞두고 계란가격이 다소 상승하는 듯 하더니 다시 하락세로 돌아섰고 언제 다시 안정적이 가격을 형성할지 모르는 긴 터널로 접어들고 있다. 난가하락 등 농가의 어려움이 지속되면 관련 기자재 업체들이 모두 어려움에 처하게 되는 것은 자명한 사실이다. 종계도 병아리 가격 여하에 따라 농가 분위기가 달라진다. 특히 계분벨트와 집란벨트 등 농가에서 사용되는 소모성 제품들은 A/S 등 특별한 상황이 발생하지 않는 이상 경기가 호전될 때까지 기다리는 경향이 있어 이러한 제품들을 만드는 업체들은 개점휴업을 해야하는 상황에 놓이게 된다. 본고는 이런 어려운 상황에도 불구하고 신뢰와 제품의 품질, A/S를 앞세워 농가에 계분벨트와 집란벨트를 공급하고 있는 두연산업(대표 박주명)을 찾아관련업계의 어려움과 향후 계획을 들어보았다.

• Journal of the KSME
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• v.31 no.9
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• pp.800-811
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• 1991

'70년대에 석유파동을 겪으면서 국내에서는 태양에너지 이용기술 개발의 필요성을 인식하여 비 상한 관심을 갖고 태양에너지 연구소를 설립하는 등 대체에너지원 개발에 박차를 가해왔다. 그 러나 '80년대 중반 이후 유가의 지속적인 안정으로 기술개발 투자가 점차 둔화되고 있는 실정 이다. '90 년대 중반에 예상되는 고유가 시대와 작년의 걸프사태와 같은 돌발적인 사태에 기인한 유가 불안정 요인은 우리 나라와 같은 석유자원이 전무한 상태에서는 매우 충격적인 일로 받아 들여지고 있다. 그 뿐 아니라 화석연료의 사용 증가에 따른 지구온난화 현상 및 환경보전 문제가 크게 부각되고 있는 현상태에서 태양에너지 이용기술 개발은 장기적인 계획 하에 지속적으로 추진되어야 할 것이다. 이와 같은 주변환경의 변화와 에너지 공급의 안정화를 위해서도 새로운 자세와 정책적인 기술개발 투자 및 지원을 강화해야 할 것이다. 태양열 이용기술 중 일부 실용 화된 분야는 적극적인 보급 활성화가 이루워지도록 지원을 해야하며 기술개발을 위한 연구비를 선진국 수준으로 높혀야 할 것이다.

• Economic and Environmental Geology
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• v.57 no.2
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• pp.161-175
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• 2024

Aggregate typically refers to sand and gravel formed by the transportation of rocks in rivers or artificially crushed, constituting a core resource in the construction industry. Gyeongsangbuk-do, the largest administrative area in South Korea, produces various sources of gravel, including forest, land (excluding other sources), river, and crushed stone. As of 2022, it has extracted approximately 6.96 million cubic meters of aggregate, with permitted production totaling around 4.07 million cubic meters and reported production of about 2.88 million cubic meters. The aggregate demand in Gyeongsangbuk-do is estimated to be 12.39 million cubic meters according to the estimation method in Ready-Mix Concrete. From the supply perspective, about 120 extraction sites are operational, with most municipalities maintaining an appropriate balance between aggregate demand and supply. However, in some areas, there is inbound and outbound transportation of aggregate to neighboring regions. Regions with significant inbound and outbound aggregate transportation in Gyeongsangbuk-do are areas connected to Daegu Metropolitan City and Pohang City along the Gyeongbu rail line, showing a high correlation with population distribution. Gyeongsangbuk-do faces challenges such as population decline, aging rural areas, and insufficient balanced regional development. Analysis using GIS reveals these trends in gravel demand and supply. Currently in this study, Gyeongsangbuk-do meets its demand for aggregate through the supply of various aggregate sources, maintaining stable aggregate procurement. River and terrestrial aggregates may be sustained as short-term supply strategies due to the difficulty of longterm development. Considering the reliance on raw material supply for selective crushing, it suggests the need for raw material management to maintain stability. Gyeongsangbuk-do highlights quarries in the forest as an important resource for sustainable aggregate supply, advocating for the development of large-scale aggregate quarries as a long-term alternative. These research findings are expected to provide valuable insights for formulating strategies for sustainable management and stable utilization of aggregate resources.

• Korean Chemical Engineering Research
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• v.53 no.6
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• pp.663-666
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• 2015

In this research, botanical extracts containing green tea, Saururus chinensis and Prunus padus were tested to see possibility as shampoo. Leaves of Green tea and Saururus chinensis were extracted with hot water. Prunus padus bark extract was applied reverse osmosis and ultrasonic extraction. When interfacial tension was measured among shampoo including botanical extracts, Sodium dodecylsulfate(SDS) and Quillaja Bark Saponin(QBS), that of shampoo was lower than that of SDS and QBS at lower concentration, however, it showed similar interfacial tension at 100% concentration. Shampoo showed moderate antimicrobial activity in Staphylococcus aureus and Candida albicans. Botanical extract did not indicate cell toxicity up to $350{\mu}g/ml$ concentration in MTT assay. Shampoo containing botanical extract was stable for 3 months, however, it showed considerable variation in pH and viscosity. In conclusion, shampoo containing botanical extract shows strong possibility for natural shampoo if the formulation is modified.

• Journal of the Korea Concrete Institute
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• v.23 no.2
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• pp.225-233
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• 2011

The volume change in concrete takes place with changes in temperature and water content immediately after concrete casting. In the early age stage, the thermal and drying shrinkages can cause cracks that are very crucial to the durability of concrete. It was reported that when the cement with lightly-burnt MgO powder was used, the shrinkage of concrete can be reduced. This study investigates fundamental properties of cement composites with lightly burnt MgO powder by performing various experiments. The stability test results verified that MgO powder in cement composites does not cause any abnormal expansion. Also, the hydrate product analysis results obtained from MgO cement paste showed that MgO powder reduces the shrinkage at the longterm ages. In addition, the cement composites containing the proper amount of MgO powder could improve compressive strength. Finally, the shrinkage reduction from using MgO powder can be optimized by increasing MgO replacement level and curing temperature.

• Journal of the Korean Society of Hazard Mitigation
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• v.4 no.1 s.12
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• pp.65-75
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• 2004

Roadbed failure due to the natural disaster may bring out social and economic damage such as the loss of life and property, the consumption of time and cost for recovery, and the delay of logistics in railway In this study, the method using geosynthetic soilbag was applied to rehabilitation of the railway roadbed which was failed by disaster. The full scale tests with the simulated train loading were performed in order to evaluate the static and dynamic performance at the railway roadbed using geosynthetic soilbag. The results of these tests were compared with unreinforced and reinforced cases with geosynthetic soilbag, respectively The data gathered by various measurement devices from these full scale tests would be useful to evaluate and understand the roadbed with geosynthetic soilbag. In conclusion, geosynthetic soilbag was evaluated as a permanent restoration method to reinforce the roadbed of railway.

• Journal of the Computational Structural Engineering Institute of Korea
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• v.26 no.4
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• pp.271-274
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• 2013

Inclinometer sensors are widely applied in many fields. Especially in the field of construction of high-rise buildings also measure the horizontal and vertical help has been applied to monitor. Recent micro electro-mechanical system(MEMS) technology with the development of the many sensors have been developed. In this paper, a MEMS inclinometer is based on a MEMS accelerometer. The sensor can measure the angle of inclination using the relationship between static acceleration and gravity acceleration from an accelerometer. From this principle, inclinometer has been developed that has more accurate. The accuracy is proved by the experiment with laser displacement. Results in the experiment express high-accuracy, stability and economics of MEMS inclinometer. In conclusion, wireless MEMS inclinometer sensor is expected to be applicable in the areas of construction and many other industries with accurate and convenient monitoring system.

• Journal of the Korean Electrochemical Society
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• v.10 no.3
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• pp.190-195
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• 2007

A new electrochemical sensor to selectively determine epinephrine was developed and its analytical characteristics has been investigated. A glassy carbon electrode was modified with Ni(II)-macrocyclic complex which has electrocatalytic effect. It was further modified with physiologically suitable and negatively charged polyuretane benzyl L-glutamate(PUBLG). The present electrode showed long term stability and it could be applied to the selective determination of epinephrine in urine sample with various coexisting compounds. Under the optimum experimental conditions the linear range was $8.0\;{\times}\;10^{-7}\;-\;2.0\;{\times}\;10^{-4}\;M$ and the limit of detection was $1.0\;{\times}\;10^{-7}\;M$. The recovery of epinephrine in urine sample diluted 5 times with buffer solution was $101.5({\pm}3.2)%$ for 6 measurements.