• 한국정보통신학회논문지
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• 제14권7호
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• pp.1521-1528
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• 2010

본 논문은 학습복잡계 이론의 시각에 근거하여 공학적 글쓰기의 관계 및 교수방법을 고찰한 것이다. 이를 위해 학습복잡계 이론의 구성요소와 특징을 살펴보고 새로운 글쓰기 교육의 가능성을 검토해보았다. 그 결과 공학적 글쓰기교육의 접근 방법이 확장되었을 뿐만 아니라 교육적 실현 가능성이 탐색되었다. 이는 새로운 공학적 글쓰기 교수학습의 가능성을 여는 계기가 될 것이다. 또한 이와 관련하여 앞으로 구체적인 사례 연구와 교재개발 등이 체계적 진행되어야 할 것을 제안하고 있다.

• 전기학회논문지
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• 제61권5호
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• pp.770-776
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• 2012

For a few recent years, KECA(Korea Electrical Contractor Association) has promoted a project to establish an electrical construction specification called Master Spec. This paper analyses the characteristics of standards-making process of the Master Spec. as an umbrella technical standard in electrical construction industry in Korea. This paper argues that even if the Master Spec. is recognized to be technical standards, the standards-making process involves both technical and social practices when viewed from social construction theory and governance perspective. This aspect of social practices in technical standards making should be well understood because various stakeholders in terms of interests, resources, and motives try to influence the process positively and negatively. KECA in responsible for enactment of the Mater Spec. should be very thoughtful in building consensus first of all among electrical contractors, managing relationship with concerned government officials, and dealing with potential deviant groups as well as in pooling expertises and developing technical knowledge needed for designing technical specification.

• 한국펄프종이공학회:학술대회논문집
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• 한국펄프종이공학회 2008년도 추계학술발표논문집
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• pp.90-95
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• 2008

• 한국펄프종이공학회:학술대회논문집
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• 한국펄프종이공학회 2002년도 추계학술발표논문집
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• pp.228-233
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• 2002

In this study, Life Cycle Assessment method has been carried out the Corrugated board box in considering environmental aspects by quantifying the environmental emission and assessing its environmental impact potential. The system boundary in this study is selected from cradle to gate stage(raw material acquisition, raw material production and product manufacturing) of the paper product. To evaluate the environmental impact potential, impact categories are divided into 8 categories. As a results, abiotic resource depletion of the impact categories has the largest contribution to the total impact potential as 31.02% of total, Next were continued ecotoxicity having a contribution of 27.17%. In the life cycle, environmental impacts from law material production stage were contributed largely as 80.78%.

• Corrosion Science and Technology
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• 제2권3호
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• pp.127-134
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• 2003

In order to explain the effect of alloying Cu on the corrosion resistance of stainless steels in chloride media for both ferritic and austenitic stainless steels, the corrosion behavior of Cu-bearing stainless steels was investigated. Alloying Cu showed beneficial effect in an active potential range and harmful effect in a noble potential range. The beneficial effect of alloying Cu was explained by the stability of deposited Cu on an anodic surface. Difference in the effect of alloying Cu between the ferritic and austenitic steels was ascribed by the differences in their corrosion potentials and the morphology of the deposited Cu.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2007년도 제38회 하계학술대회
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• pp.1453-1454
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• 2007

A street light is an electrical equipment to improve the traffic safety and the security for people in night. However, many accidents due to electric shock have happened in recent, people were interested in the safety of electrical facilities. And people want to know the danger by touch and step voltages. When the electric power lines fall down on the ground, the fault current flows to ground rod and the potential near the ground rod is increased to induce the high touch and step voltages. In this paper, we installed different ground rods with a street light and investigated the electrical potential according to ground methods and the types of ground rod. Finally, we examined the electrical facilities with the experimental result and present the improved technical data for the safety from electric shock

• 펄프종이기술
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• 제41권2호
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• pp.26-33
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• 2009

A new testing method to evaluate the deposition potential of white pitch was developed. The new method involves depositing the potential white pitch particles on the air bubble covered plastic film in the pitch deposit tester (PDT) developed by KRICT and analysing the deposited area of white pitch using an image analyzer. In addition, the effect of two important factors (pH and calcium hardness) on white pitch deposition potential was elucidated. When pH of the coated broke stock was increased from neutral to alkali or the calcium hardness of the stock was decreased, the pitch deposit area was decreased, implying that these two factors have to be controlled during the evaluation of pitch deposition potential. It was found that hydrophobicity of the surface of latex binding films repulped is a key factor influencing white pitch deposition.

• 펄프종이기술
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• 제39권4호
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• pp.53-60
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• 2007

LbL multilayering technology introduced by Decher is a nano technique that a substrate surface is layered by the successive deposition of polyelectrolytes with positive and negative charge. We investigated the electrochemical properties of LbL multilayered pulp fibers with poly-DADMAC and PSS. Three types of pulp-Hw-BKP, BCTMP and KOCC- were treated with polyelectrolytes. Zeta potentials of multilayered fibers ranged from +30 mV to +40 mV, depending on the intial zeta potential of pulp fibers and fines content. All kinds of pulp which were examined in this study, however, showed a similar zeta potential of -35 mV after layering with PSS. To obtain pulp fiber with a uniform and stable zeta potential, BCTMP and KOCC pulp fibers should be multilayered above 5 times. The addition level of polyelectrolytes had little influence on the zeta potential of pulp fibers.

• 한국수소및신에너지학회논문집
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• 제27권4호
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• pp.447-461
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• 2016

Recently, the Renewable Fuel Standard(RFS) has been commenced from July 31, 2015 in the New and Renewable Energy Act for expanding the supply of renewable energy and reduction of national GHG target in Korea. The biodiesel is only a means of implementation for the RFS, therefore the biodiesel supply expansion is important for fulfilling the RFS obligation policy. The major key points of the biodiesl supply are expanding domestic feedstocks due to the over 60% dependence on foreign feedstock and reducing the price of feedstock because of the over 70% occupation of feed stock price in the biodiesl production cost. Therefore, we estimated actual amount of potential feedstocks which are possible to use for biodiesl production in Korea and investigated technical and political improvements for expanding biodiesl. For estimating a potential feedstocks, first selected the potential biodiesl feedstocks by investigating the status of global biodiesl feedstocks and then analyzed the possible potential amount of each feedstock by surveying the generation situations, the distribution structures and the technical level.

• 자원환경지질
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• 제44권6호
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• pp.513-523
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• 2011

이 연구에서는 최근에 발표되고 국제기구에 의해 공인된 protocol에 따라 인공 지열 저류층 생성 기술(EGS)을 통한 우리나라 지열발전의 잠재량을 평가하였다. 잠재량 추정에 필요한 입력 자료인 암석 밀도, 비열 및 열전도도는 1,516개 암반 시료의 측정값을 이용했으며, 열생산율은 180개 자료, 지열류량은 352개 자료, 그리고 지표면 온도는 54개 자료를 사용하였다. 내륙을 34,742개의 $1'{\times}1'$ 크기 격자로 나누어 3-10 km 깊이 범위에 걸쳐 1 km 깊이 구간별로 온도 분포를 계산하고 이로부터 열에너지 부존량을 계산하였다. 지하 3-10 km 범위의 이론적 잠재량은 6,975 GW로 계산되었고 이는 2010년 우리나라 총 발전용량인 76 GW의 약 92배에 달한다. 기술적 잠재량은 3-6.5 km 깊이, 개발행위가 가능한 지역만을 고려하고 또한 암반으로부터의 열 회수율(0.14)과 발전시설의 온도 특성까지 포함해서 산출되었다. 온도하강요소 $10^{\circ}C$를 고려할 때 총 기술적 잠재량은 19.6 GW로 나타나고 있다. 만약 온도하강요소를 경제적 잠재량에 포함시킬 수 있도록 제외한다면 기술적 잠재량은 56 GW로 늘어난다.