• Proceedings of the Korea Society of Environmental Toocicology Conference
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• 2003.10a
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• pp.151-151
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• 2003

토양에 방치된 농업용 폐비닐은 거의 분해가 되지 않으며, 수분과 공기의 유통을 차단하고 토양 내 미생물들의 흐름을 막아 토양을 더욱 황폐화시키게 된다. 불법적인 소각 때는 산불의 위험에다 다이옥신, 염소 및 염화수소가스 등을 배출해 대기오염을 유발시킨다. 폐비닐을 열분해과정으로 처리하여 아주 작은 입자로 미분쇄하고 겔상태로 용융된 원료물질속으로 완전히 균일하게 혼합하여 골재로 활용하는 과정에서 가스상과 액상의 여러 가지 중간생성물질이 발생하게 되며, 농약의 살포에 의한 잔류농약 둥 인체에 유해가능한 요소들이 있을 수 있다. 본 연구에서는 개발공정이나 제품에서 인체에 영향을 미칠 수 있는 물질에 대하여 유해성을 평가하고 용응 겔 및 가스와 오일에 함유된 화학성분을 분석하였기에 보고하고자 한다 시험동물의 혈액생화학적 검사에서는 농업용 폐비닐물질 및 열분해 파생물질의 혈청 Cholesterol, 혈청 Alanine aminotranseferse와 Aspartate aminotransferse, Albumin 수치, LDH, Glucose, Uric acid, A/C 비 등의 생화학적 활성도를 측정한 결과들에서는 농업용 폐비닐물질을 투여한 시험군에서 나타난 결과와 비교하여 열분해 파생물질을 투여한 시험군에서 나타난 결과가 감소된 통계결과를 보였다. 이 결과들은 농업용 폐비닐물질을 투여한 시험군보다 열분해 파생물질을 투여한 시험군의 외부독성물질 투여에 의한 생체독성의 영향과 생체에 가해진 스트레스강도가 작았음을 의미하는 것이다. 잔류농약분석에서는 시료로부터 농약을 추출하는 용매추출과정, 시료추출물 중 공존하는 방해성분을 제거하는 정제과정, 폐비닐물질 및 열분해 파생물질 성분을 100mg/kg 이상군의 투여 후 시험동물의 부검시 모든 투여군에서 독성소견이 인정되지 않았다. 이와 같은 결과로 열분해 및 연소과정에서 발생하는 파생물질의 분석결과를 응용하여 대기오염을 방지하고 인체 유해물질을 차단하는 공해 방지 설계의 기초자료를 제안하고자 한다.

• Cartoon and Animation Studies
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• s.43
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• pp.255-284
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• 2016

This article aims at a discourse analysis on the selected 1970s Myungrang Manwhas, in the cases of Ggubungi, Doggaebi Gamtu, Yochul Balmyungwang. For the analysis, the history, pre-censorship, and distribution structure of Myungrang Manwha are referenced, as well as the considerable changes and developments on the definition of 'myungrang' since the 1920s. In employing Foucauldian discourse analysis to the texts, the selected Myungrang Manwhas are analyzed as discursive formation, which emerged within the social relations of the era; the characters' dialogues are analyzed as statement. The analysis examines the discourses that the texts disseminated, and the social context of the utterance. It is demonstrated that the Myungrang Manwhas are forms of representation, which implies 'the contested acquisition on capital and power', 'the emphasis on nationalist aspects', and 'the interpellation and discipline of subject active' of the time. Moreover, it is revealed that the forms of control, such as pre-censorship, were the articulation of the will to power, which drove the discoursive formation to function as an apparatus that meticulously constituted the ruling ideology. In conclusion, the Myungrang Manwhas are rather texts that encompasses political and social context of the era than a mere comic relief.

• Journal of Korean Society of Rural Planning
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• v.19 no.4
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• pp.261-268
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• 2013

사무르디는 스리랑카의 빈곤퇴치를 위한 프로그램 중 가장 규모가 큰 사회복지 지원 사업으로 1995년 청년, 여성, 장애인 등의 취업기회의 제공과 역량을 제고하여 궁극적으로 국가의 빈곤을 퇴치하고자 중앙정부에 의해 마련되었다. 본 연구는 사무르디 프로그램 수혜자의 만족도를 높이기 위한 사회경제적 관련 인자들이 무엇인지를 밝히고자 하였다. 사례연구지역은 스리랑카 중부지역에 위치한 오지이며 빈곤도가 높아 본 프로그램의 수혜율이 비교적 높은 캔디(Kandy) 지역을 대상으로 하였다. 본 프로그램의 주목적인 소득향상을 비롯하여 훈련프로그램, 사무르디은행의 신용, 정부보조금, 보험금, 기술정보제공, 마케팅시설, 고용기회제공, 도로개발, 관개수로시설 및 공공기반시설 등 프로그램의 지원내용 등과 관련된 다양한 인자들을 대상으로 수혜자의 만족도는 물론 이에 영향을 미치는 사회경제적 인자의 특성 등을 밝히고자 하였다. 다단계 표본 추출방법으로 150 사무르디프로그램 수혜자를 선정하여 관련 설문조사를 실시하였으며(유효설문 127), SAS9.1 통계분석용 소프트웨어를 사용하여 빈도분석, 회귀분석 등을 실시하였다. 그 결과 사무르디 수혜자들은 정부보조 및 사무르디 은행의 신용 제공, 보험금 지급, 도로개발, 소득 증대 등에 대해서는 만족도가 매우 높은 반면 종자나 비료 등의 농업투입요소나 마케팅시설, 기술정보 제공 등에 대해서는 비교적 낮은 만족도를 보였다. 회귀분석 결과 사무르디 프로그램 실시 후 소득증대, 고용 기회와 훈련프로그램 제공, 사무르디 은행의 신용 제공 등이 중요한 요인임을 확인할 수 있었다. 본 사무르디 프로그램을 통하여 지역주민의 생활여건 개선은 물론 소득을 향상시켜 나아가 빈곤 퇴치라는 본래의 취지와 역할을 제대로 수행하기 위해서는 농업인 조직 강화, 농산물집하시설 등 마케팅 및 유통 시설 확충, 농기계 지원, 농업생산시설 등을 지속적으로 확충하여야 할 것이며, 정부의 지속적인 모니터링과 평가 등을 통하여 사무르디 프로그램을 보다 긍정적으로 발전시켜 나가야 할 것이다.

• Journal of the Korean Society of Fisheries and Ocean Technology
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• v.39 no.1
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• pp.27-32
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• 2003

Under the assumption of potential flow, free-surface flow around a hydrofoil is calculated by the high-order spectra1!boundary-integral method, This method is one of the most efficient numerical methods by which the nonlinear interactions between hydrofoil and free-surface can be simulated in time-domain. In this method. the wave potential which represents the nonlinear evolution of free-surface is solved by the high-order spectral method and the body potential which provides the effects of hydrofoil and shed vortex is solved by the boundary-integral method. The calculated free-surface profiles which are generated by a uniformly translating hydrofoil are compared with other experimental results. And they show relatively good agreements each other. As another example, free-surface flow generated by a heaving and translating hydrofoil is calculated and discussed.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.15 no.1
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• pp.195-202
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• 2011

RFID(Radio Frequency IDentification) is a system to identify objects and its usage is being extended to distribution, healthcare, and air&port etc. RFID is a contactless system environment, and reducing tag authentication time is important because multiple tags are identified at the same time. Studies about RFID system so far is, however, mostly to improve security vulnerability in the tag authentication process. Therefore, this paper suggests an efficient scheme to decrease the time of tag authentication which is also safe for the security of tag authentication process. The proposed scheme cuts down on the tag ID search time because it searches only the classified relevant ID in the database, which is one of many components of RFID system, by using identification bits for tag ID search. Consequently, the suggested scheme decreases process time for tag ID authentication by reducing the processing time and the load of the database. It also brings performance improvement of RFID system as it improves the energy applicability of passive tag.

• Journal of Internet Computing and Services
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• v.14 no.3
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• pp.1-13
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• 2013

The recent emergence of diverse platform-based media devices such as smart phones and iPads has aroused interest of consumers all across the world. This interest has led to digitalization of paper books and a steep growth in the digital publishing industry at home and abroad. However, advent of various devices and content has caused the issue of compatibility and produced needs and demand for standardization to exchange and share content related to digital publication. Through collection of opinions of 16 stakeholders from the industrial, academic, research, and public sectors, this study aims to examine predictable future changes about content and its distribution, devices, standardization, technical protective measures, and obstacles in future digital publishing and eventually to draw out areas and elements for future standards development.

• Journal of the Institute of Convergence Signal Processing
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• v.20 no.4
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• pp.218-225
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• 2019

Since the publication of Satoshi Nakamoto's white paper on Bitcoin in 2008, blockchain is in the spotlight as one of the core technologies of the Fouth Industrial Revolution, which can be used in various industries beyond simple cryptocurrency. various researches and developments are being conducted worldwide to utilize blockchain technology, and a global blockchain consortium is formed. In addition, attempts are being made to apply to various industries such as logistics, distribution, and medical care as well as the financial sector. However, blockchain tecnology developments still do not reach the level that meets these concerns and expectations. In this paper, we presents a comprehensive overview of blockchain technology by giving its brief concepts, consensus algorithms, standardization, and security threats.

• Korean journal of communication and information
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• v.57
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• pp.7-32
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• 2012

The purpose of this study was to examine the perverted labors of online newspapers' editors in Korea. Online newspaper editors' works were be influenced directly and indirectly by the printed newspaper, the parent company of online newspaper. Their labor conditions were poorer than online newspaper editors'. And online newspapers' editors didn't have status as professionals. They set a premium on Internet traffics on their works. For online newspaper editors' normal labor conditions, the most practical measure was to normalize the editorial system of online newspapers. How to raise the status of online newspaper editors was to secure the online newspapers' editorial right. And to conclude, to improve the quality of online journalism in Korea, the most urgent issue is to improve online newspaper editors' professionalism.

• Journal of the Korea Society of Computer and Information
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• v.15 no.4
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• pp.19-25
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• 2010

In this paper, the performance of the DoS information security algorithm is evaluated to provide the multimedia traffic between the nodes using the multicasting services. The essence technology for information security to distribute the multimedia contents is presented. Under the multicasting services, a node participating new group needs a new address and the node compares the collision with the existing nodes, then DoS attack can be occurred between the nodes by a malicious node. Using the NS2 simulator, the number of DoS attacks, the average number of trials to generate new address, and the average time to create address are analyzed. From simulation results, the efficient algorithm with relevant random number design according to the DRM network is needed to provide secure multimedia contents distribution.

• Korean Journal of Food Science and Technology
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• v.33 no.1
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• pp.72-77
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• 2001

The effect of gamma-irradiation on the microbiological and general quality changes of the kochujang(Korean hot pepper paste) was studied. Kochujang was prepared, irradiated at 5, 10 and 20 kGy, and then stored at $25^{\circ}C$ for twelve weeks. The results showed that the Bacillus were decreased by 5 log cycles with dose of 20 kGy with 3.94 kGy of $D_{10}$ value. Yeast and Lactobacillus cells were nearly eliminated by 10 kGy. The formation of $NH_2-nitrogen$ and reducing sugar, enzyme activity, acid production and browning were not affected by gamma irradiation. Therefore, it was considered that the kochujang treated with gamma irradiation maintained better microbial quality than that of the control with storage.