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231.

남북한 보훈정책비교

유영옥 한국보훈학회 한국보훈논총 43 Pages

한국보훈학회 한국보훈논총 2009, 제 8권 제 2호 (통권 15집) 1 1-43 (43 pages)

유영옥 저
...
- 7,200원
본 연구는 남·북한의 보훈정책을 비교하기 위하여 다음과 같은 연구의 목적을 설정했다. 첫째, 남·북한의 보훈정책을 비교하기 위한 연구방법으로서 기존의 문헌의 접근방법에 대한 검토를 통해 내재적·외재적 접근방법을 통합하여 상징주의적 관점에 의한 분석방법의 유효성을 검증해보고자 했다. 둘째, 남·북한 보훈정책의 목적(이념)과 수단의 상징성을 분석하고자 한다. 즉 기존의 연구들이 상징성 또는 실질정책에 대한 소개에 근거하고 있다면 본 연구는 그러한 상징들이 사용되는 맥락을 분석하여 남·북한의 체제유지에...
232.

플라톤의 국가에 나타난 epitedeuma의 개념 분석 : 직업의 명확한 이해에 대한 기여

김현숙 한국교육학회 교육학연구 17 Pages

한국교육학회 교육학연구 2009, 47권 1호 1 1-17 (17 pages)

김현숙 저
...
- 4,600원
이 논문의 목적은 플라톤의 국가에서 정의의 개념의 핵심인 epitedeuma의 개념분석을 통하여 우리의 직업의 본질이 무엇인지를 생각하며, 우리들이 하고 있는 일 자체의 의미를 숙고해 보는 데 있다. 플라톤은 국가에서 기존의 정의의 개념이 불완전함을 밝히며, 새로운 정의의 개념을 제안한다. 그에 따르면 정의란 다른 이를 방해하지 않으며, 각자가 자신의 맡은 바(epitedeuma )를 충실히 하는 것이고 국가의 존립자체를 가능하게 하는 근원이다. 그는 정의의 개념을 알기 위해 이론적으로 이상적인 국가의 이념을 세우고 국가형성의...
233.

Optical sensitivity of DNA-dispersed single-walled carbon nanotubes within cement composites under mechanical load

Jin Hee Kim, Inkyu Rhee, Yong Chae Jung, Sumin Ha, Yoong Ahm Kim 한국탄소학회 Carbon Letters 7 Pages

한국탄소학회 Carbon Letters 2017, Vol.24 12 90-96 (7 pages)

Jin Hee Kim, Inkyu Rhee, Yong Chae Jung, Sumin Ha, Yoong Ahm Kim 저
...
- 3,000원
We demonstrated the sensitivity of optically active single-walled carbon nanotubes (SWCNTs) with a diameter below 1 nm that were homogeneously dispersed in cement composites under a mechanical load. Deoxyribonucleic acid (DNA) was selected as the dispersing agent to achieve a homogeneous dispersion of SWCNTs in an aqueous solution, and the dispersion state of the SWCNTs were characterized using various optical tools. It was found that the addition of a large amount of DNA prohibited the...
234.

Flexural, electrical, thermal and electromagnetic interference shielding properties of xGnP and carbon nanotube filled epoxy hybrid nanocomposites

Young Sil Lee, Yeon Ho Park, Kwan Han Yoon 한국탄소학회 Carbon Letters 6 Pages

한국탄소학회 Carbon Letters 2017, Vol.24 6 41-46 (6 pages)

Young Sil Lee, Yeon Ho Park, Kwan Han Yoon 저
...
- 3,000원
The microstructure, flexural properties, electrical conductivity, thermal conductivity and electromagnetic interference (EMI) shielding effectiveness (SE) of epoxy composites filled with multi-walled carbon nanotubes (CNTs), exfoliated graphite nanoplatelets (xGnPs) and CNT-xGnP hybrid filler were investigated. The EMI SE of the CNT-xGnP hybrid composite was higher than 25 dB at 100 MHz while that of the xGnP based composite was almost zero. The flexural modulus of the CNT-xGnP based epoxy...
235.

Catalytic hydrogenation-assisted preparation of melt spinnable pitches from petroleum residue for making mesophase pitch based carbon fibers

Dong Hun Lee, Jisu Choi, Young Se Oh, Yoong Ahm Kim, Kap Seung Yang, Ho Jin Ryu, Yong Jung Kim 한국탄소학회 Carbon Letters 8 Pages

한국탄소학회 Carbon Letters 2017, Vol.24 4 28-35 (8 pages)

Dong Hun Lee, Jisu Choi, Young Se Oh, Yoong Ahm Kim, Kap Seung Yang, Ho Jin Ryu, Yong Jung Kim 저
...
- 3,000원
We demonstrated an effective way of preparing melt spinnable mesophase pitches via catalytic hydrogenation of petroleum residue (fluidized catalytic cracking-decant oil) and their subsequent thermal soaking. The mesophase pitches thus obtained were analyzed in terms of their viscosity, elemental composition, solubility, molecular weight, softening point and optical texture. We found that zeolite-induced catalytic hydrogenation under high hydrogen pressure contributed to a large variation in the...
236.

Mechanical and electrical properties of cement paste incorporated with pitch-based carbon fiber

Inkyu Rhee, Jin Hee Kim, Sang Hee Park, Sungho Lee, Bong Ryeul Ryu, Yoong Ahm Kim 한국탄소학회 Carbon Letters 8 Pages

한국탄소학회 Carbon Letters 2017, Vol.23 4 22-29 (8 pages)

Inkyu Rhee, Jin Hee Kim, Sang Hee Park, Sungho Lee, Bong Ryeul Ryu, Yoong Ahm Kim 저
...
- 3,000원
The compressive strength and electrical resistance of pitch-based carbon fiber (CF) in cementitious materials are explored to determine the feasibility of its use as a functional material in construction. The most widely used CFs are manufactured from polyacrylonitrile (PAN-based CF). Alternatively, short CFs are obtained in an economical way using pitch as a precursor in a melt-blown process (pitch-based CF), which is cheaper and more eco-friendly method because this pitch-based CF is basically...
237.

Comparative numerical evaluation for the low velocity impact behavior of T300 and T800 composite system

Jae-Seok Choi, Heung Soap Choi, Soo-Jin Park, Myung Kyun Park 한국탄소학회 Carbon Letters 7 Pages

한국탄소학회 Carbon Letters 2017, Vol.22 9 89-95 (7 pages)

Jae-Seok Choi, Heung Soap Choi, Soo-Jin Park, Myung Kyun Park 저
...
- 3,000원
Carbon fiber reinforced polymer (CFRP) composites have been used for many decades for extreme light weight design purposes in various areas, such as the aerospace industry, automobiles, sports goods and etc. because they provide the advantages of high specific strength and high rigidity [1]. In particular, the fuselage and wings of various aircraft, as well as the load bearing structures and components of mechanical and civil engineering systems are currently being manufactured with CFRP....
238.

Effects of carbon additives on heat-transfer and mechanical properties of high early strength cement mortar

Dae-Geun Lee, Kyung Hoon Kim, Hyeong Gi Kim, Young-Seak Lee 한국탄소학회 Carbon Letters 4 Pages

한국탄소학회 Carbon Letters 2016, Vol.20 11 72-75 (4 pages)

Dae-Geun Lee, Kyung Hoon Kim, Hyeong Gi Kim, Young-Seak Lee 저
...
- 1,500원
mortar-based structures such as buildings, bridges, tunnels, highway and roads are inevitably degraded by deterioration or damage. To save expense during construction and to avoid traffic congestion during repair work, it is very important to reduce construction time as much as possible. In order to reduce construction time, therefore, the setting time of mortars has to be shortened. The mortars which have short setting times are called high early strength cement mortars. These high early streng...
239.

Adsorptive removal of atmospheric pollutants over Pyropia tenera chars

Heejin Lee, Rae-su Park, Hyung Won Lee, Yeojin Hong, Yejin Lee, Sung Hoon Park, Sang-Chul Jung, Kyung-Seun Yoo, Jong-Ki Jeon, Young-Kwon 한국탄소학회 Carbon Letters 10 Pages

한국탄소학회 Carbon Letters 2016, Vol.19 10 79-88 (10 pages)

Heejin Lee, Rae-su Park, Hyung Won Lee, Yeojin Hong, Yejin Lee, Sung Hoon Park, Sang-Chul Jung, Kyung-Seun Yoo, Jong-Ki Jeon, Young-Kwon 저
...
- 3,000원
As a replacement for activated carbon, biochar was synthesized and used for the adsorptive removal of formaldehyde and nitrogen oxide. Biochar was produced from the fast pyrolysis of the red marine macro alga, Pyropia tenera. The P. tenera char was then activated with steam, ammonia and KOH to alter its characteristics. The adsorption of formaldehyde, which is one of the main indoor air pollutants, onto the seaweed char was performed using 1-ppm formaldehyde and the char was activated using a...
240.

Microwave-assisted pretreatment technologies for the conversion of lignocellulosic biomass to sugars and ethanol: a review

Pradeep Puligundla, Sang-Eun Oh, Chulkyoon Mok 한국탄소학회 Carbon Letters 10 Pages

한국탄소학회 Carbon Letters 2016, Vol.17 No.1 1 1-10 (10 pages)

Pradeep Puligundla, Sang-Eun Oh, Chulkyoon Mok 저
...
- 3,000원
Lignocellulosic biomass conversion to biofuels such as ethanol and other value-added bio-products including activated carbons has attracted much attention. The development of an efficient, cost-effective, and eco-friendly pretreatment process is a major challenge in lignocellulosic biomass to biofuel conversion. Although several modern pretreatment technologies have been introduced, few promising technologies have been reported. Microwave irradiation or microwave-assisted methods (physical and...

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