• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2012.10a
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• pp.169-170
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• 2012

The efforts for improving 'Maritime Traffic Safety Assessment Scheme(MTSA scheme)' have continued to the present since May 27th, 2009. But recently, there's a controversy about whether it has been performed properly or the results is significant. These new discussions were arose from lack of validity and appropriateness we had yet to find. At this point, it needs to establish sound MTSA scheme through the comprehensive review. This research developed a suitable meta-evaluation model for MSTA with applying theory of the teta-evaluation, that is the evaluation of evaluations and verified by using meta-evaluation methods like as literature studies, expert reviews, surveys and etc. The results of this study can be used to evaluate MTSA activities and it will contribute to improving MTSA scheme.

• 대학교육
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• s.82
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• pp.66-74
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• 1996

연구.교육.사회활동이라는 삼분법적 교수업적 평가제는 특정 분야의 천재성이 인정되지 않는 평범한 대학상과 상식적인 교수상만 만들어낸다. -무의미한 논문, 저술의 양산에 질린 우리가 예.체능계 교수들의 업적평가를 일반계의 틀에 맞춘다는 것 자체가 뒤떨어진 발상이다. 예술가는 예술작품으로 평가받아야 한다. 그러기 위하여 창작평가위원회가 따로 설치되어야 한다.

• Journal of Environmental Science International
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• v.8 no.1
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• pp.7-18
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• 1999

Fauna and biological water quality using benthic macroinvertebrates were analysed and estimated macroinvertebrates. Samples were collected 5 times from the 7 sites in the river between April and December 1997, and the results are summarized as follows. The taxa of benthic macroinvertebrates was totally composed 81 species, 45 genus, 37 families, 15 orders, 8 classes in 3 phyla. Among them, aquatic insects were mostly abundant as 65 species, and also, there were a species of oligochaetes, 2 species of hirundinida, 6 species of gastropods, 5 species of polecypoda, and 2 species of crustaceans. Average individual numbers in the whole sampling sites was 815 per square meter, and insects were abundant (Approx. 80%). Among the insects, the major taxa were respectively ephemeroptera (Approx. 70%) and trichoptera (Approx. 18%). According to the average individual numbers in each site, Chung-do stream (site 1) showed the highest appearance rate as 262 individual/ $m^3$ (32.2%), and the lowest value was at the end of Miryang River (site 7) as 38 individual / $m^3$(4.7%). The dominant species among the whole samples was Ecdyomurus levis Navas, and dominance indices was 0.3. In each site, Ecdyomurus levis Navas was dominant species from site 1 to site 5, and dominant species at site 6 and 7 was respectively Hirudinidae sp. 1. Species diversity index in total average of samples was 2.66. Average of species diversity index according to each study site was the highest value at site 4 (H'=3.47), and site 2, 1, 3, 5, 6, and 7 in that order. According to the water quality as biotic indices, GPI value was 1.49 in total average of Miryang river, and the pollution indices evaluated secondary water quality criteria as $\beta$-mesosaprobics. In each site, the best water quality was at site 3, and it revealed the first water quality criteria as Oligosaprobic. It was then site 1, 2, 4 and 5 in the order of water quality, and was evaluated secondary water quality criteria as $\beta$-mesosaprobics, respectively. Site 6 was also revealed the third water quality criteria as $\beta$-mesosaprobics. The worst water quality was at site 7, which revealed the third water quality criteria as a-mesosaprobics.

• Journal of Digital Convergence
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• v.13 no.9
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• pp.431-437
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• 2015

This convergence study analyzed the effectiveness of contrast agent reduction by normal saline solution dilution in the computed tomography of arteries of lower limb. 48 patients of 125 cc contrast agent and 30 patients of the same amount divided at a ratio of 7:3 for the contrast agent and normal saline solution were studied. The average attenuation coefficient(HU) and signal to noise ratio(SNR) of abdominal aorta, femoral artery, popliteal artery and posterior tibial artery at each image were evaluated quantitatively and the four criteria in the five point scale was conducted qualitatively by two radiologists and four radiological technologists. In the quantitative evaluation, both HU and SNR had high average score before dilation but there were no statistical significance by independent t-test(p>0.05). In the qualitative evaluation, there were a little differences in the average scores between 4.86~4.77 of original contrast agent and 4.83~4.67 of dilated contrast agent but there were no statistical significance(p>0.05). In the computed tomography of arteries of lower limb, the dilated contrast agent doesn't influence image quality and reduces overall contrast agent and lowers iodine content per unit of molecular therefore will contribute to decrease side effect of contrast agent.

• Journal of Korea Game Society
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• v.14 no.1
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• pp.69-80
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• 2014

The government enacted shutdown policy in the fall of 2011 to prevent game addition of youth. Now shut down policy has been implemented about 3 years. We surveyed gamers' and non-gamers' perception about shut down system in 3 years. So this article tried to analysis the perception change of gamers and non-gamers about shut down policy. In result of this analysis, the evaluations of shutdown policy has decreased. Both gamer and non-gamer have the thought against the shot down policy. Among 2011-2012, non-gamer's perception on shut down policy had not changed much. But among 2012-2013, non-gamers' perception as well as gamer's perception has changed against shut down policy. This result showed that we should re-consider the effect and necessity of the shut down policy and whether the government should maintain the shut down policy.

• Annual Conference of KIPS
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• 2005.11a
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• pp.317-320
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• 2005

고품질의 소프트웨어를 개발하기 위한 방안으로 품질평가를 통해 문제점을 발견해서 보완하는 과정을 활용할 수 있다. 최근, 소프트웨어 품질 평가 및 인증에 관한 국가적인 체계가 구축되고 실질적인 인증활동이 수행되고 있으나 인증의 관점에서 확립되어 있는 표준화된 절차가 미흡하여 효과적인 품질 평가 및 인증을 위한 절차의 개발이 요구되고 있다. 현재, 소프트웨어 제품의 품질평가를 위한 프로세스로서 ISO/IEC 14598이 6개 부분으로 구성되어 있으며, 이 프로세스를 적용하여 품질평가에 적용하거나 품질향상을 도모하려는 연구가 활발히 진행되고 있다. 본 연구에서는 제3자 시험자의 관점에서 활용할 수 있는 소프트웨어 품질평가 프로세스인 ISO/IEC 14598-5를 중심으로 표준에서 정의하고 있지 않은 시험전 과정과 후 과정에 대한 부분을 포함하고 프로세스의 각 단계별로 구체적인 실제적인 활동을 포함하여 보완하였다.

• Annual Conference of KIPS
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• 2006.11a
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• pp.563-566
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• 2006

최근 다양한 기능을 구현하는 임베디드 소프트웨어가 포함된 의료기기의 개발이 증가함에 따라 안전성을 보장하기 위한 제 3 자 인증기관에 의한 의료용 임베디드 소프트웨어의 평가의 필요성이 절실하다. 따라서 본 연구에서는 소프트웨어 평가기준을 제시하는 ISO/IEC 9126을 바탕으로 의료용 임베디드 소프트웨어의 평가 항목을 선정하고, 이에 적절한 가중치를 산출하여 보다 객관적이고 정량적인 평가를 수행할 수 있는 평가 기준을 개발하고자 한다.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2012.10a
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• pp.231-233
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• 2012

본 연구에서는 해상교통안전진단제도 시행관련 제도의 고도화 및 효율적 운영을 위해, 제도 운영 및 관리를 위한 부분을 검토 및 개선 향상방안을 모색하고자 수행하게 되었다. 해상교통안전진단제도 운영관련 안전진단서 평가 및 절차에 관한 부분을 분석 및 개선점을 도출하고 제언을 하고자 한다. 해상교통안전진단제도의 시행경과가 3년이 되는 현시점에서 해상교통안전진단관련 수행방법 및 기술적인 부분과 더불어 진단서 평가방법, 심사위원회의 운영 방안 등 제도 운영부분에 대한 검토 도출된 사항을 제언하여 제도의 효율적 운영 방안을 모색하고자 한다.

• Journal of Korean Society of Environmental Engineers
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• v.34 no.11
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• pp.735-742
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• 2012

This study tried to find a suitable method for enhancing the foam stability of cationic surfactants that normally generate less foam or no foam. Several trials were made to enhance the foam stability: addition of anionic surfactant, colloids and polymer. Cationic starch (CA-ST) did not form foam at all, while the foam stability of two other cationic surfactant also showed low levels; methyl triethanol ammonium methyl sulfate distearyl ester (CEQ90) for 46 sec. and Cetyl trimethyl ammonium chloride (CM29) for 31 seconds. Foam stability of cationic surfactants were significantly affected by addition of anionic surfactant, sodium dodecyl sulfate (SDS). Foam stability of CA-ST was significantly enhanced by addition of SDS, while those of CEQ90 and CM29 were decreased. Addition of colloids ($SiO_2$, kaolin) and polyvinyl alcohol (PVA) enhanced foam stabilities of CEQ90 and CM29. However, CA-ST did not form foam even in the presence of colloids or PVA. Effect of simultaneous addition of colloids and anionic surfactant on foam stability of cationic surfactant showed that foam stability of cationic surfactant was more influenced by addition of anionic surfactant than colloids. Effect of simultaneous addition of PVA and anionic surfactant on the foam stability of cationic surfactant also showed that presence of anionic surfactant significantly affect the foam stability of cationic surfactant. Foam stability of CA-ST was greatly increased to 8,780 seconds by addition of SDS 0.14% and PVA 2.5%. The foam stability of CA-ST was 8 times higher than CEQ 90. This study suggested that cationic surfactants not forming foam can generate foam by addition of anionic surfactant and its stability can be additionally increased by addition of colloids and PVA. The study results showed that enhancement in foam stability of cationic surfactant was prominently affected by the concentration of anionic surfactant added.

• Proceedings of the Korean Society of Propulsion Engineers Conference
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• 2008.05a
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• pp.111-114
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• 2008

The performance evaluation of a micro monopropellant thruster is described in this paper. The platinum which has stable physical and chemical properties is used as a catalyst. The ceramic form, named Isolite is chosen as a catalyst bed. Hydrogen peroxide whose concentration is up to 90wt% is supplied into thruster by direct pressurization with nitrogen gas. The $c^*$ efficient is calculated to evaluate the performance of a thruster. The pressure rise time, pressure decent time and reaction delay are synthetically considered.