• Proceedings of the Korean Nuclear Society Conference
• /
• 1996.05a
• /
• pp.419-424
• /
• 1996

안전등급 Ni-Cd 축전지는 품질수명이 15-25년으로 환경시험 등을 통하여 입증되었지만, 설치후 7년이 경과한 한국 원자력 연구소 방사성 폐기물 처리시설의 안전등급 Ni-Cd 축전지는 1992년에 실시한 최초의 용량시험 결과 기준용량에 미달하였다. 안전등급 Ni-Cd 축전지와 관련된 각종 유지보수 기술을 조사하고, 용량복구를 위한 증류수와 전해질 성분의 적절한 보충, 충전과 방전 특성의 적용, 활성제 보충, 전극의 청소를 통하여 매년 성능이 회복되어서 1995년도 용량시험시에는 기준용량을 초과하였으므로 안전등급 Ni-Cd 축전지의 용량 문제해결 사례로 소개한다.

• Proceedings of the Korea Society of Design Studies Conference
• /
• 1999.05a
• /
• pp.58-59
• /
• 1999

오늘날 소비자에게 있어 제품의 이미지는 제품을 선택하는 중요 기준이 되고 있으며, 기업의 제품개발에 있어서도 제품의 이미지는 품질과 성능 못지 않게 매우 중요한 요소로 자리잡고 있다. 디자이너의 입장에서 성공적인 제품디자인의 개발을 위해서는 소비자가 원하는 이미지를 정확하게 파악하고, 그 이미지를 디자인에 충분히 반영해야 할 것이다. (중략)

• Proceedings of the Korea Information Processing Society Conference
• /
• 2011.04a
• /
• pp.1398-1400
• /
• 2011

2000년 초에 PC간 인터넷을 통한 음성통화를 시작으로 최근에는 스마트폰의 전용 애플리케이션까지 VoIP 기반의 음성통화 서비스가 발전해왔다. 이에 따라, VoIP를 통한 외부 공격 및 침입에 대한 사례가 발생되고 이를 해결하기 위한 보안 소프트웨어들이 나오기 시작하였다. 일반적으로 VoIP기반의 소프트웨어에 대한 품질 기준은 사용자의 통화품질이 최우선 이었다. 하지만, GS시험.인증 과정을 통해 VoIP 보안 소프트웨어가 통화품질에는 직접적인 영향을 미치지는 않지만 전체 운영 시스템에 미치는 영향을 확인하고, 시험 중 발생한 문제에 대한 해결 방안 제시를 통해 VoIP의 품질을 향상시킬 수 있었다.

• Journal of the Korean Institute of Landscape Architecture
• /
• v.41 no.1
• /
• pp.60-70
• /
• 2013

This study focused on analyzing classification system, technique methods, quality levels of periodic amendment characteristics in planting of standard specification. Through analyzing the above and comparing with foreign case study, this study suggests the improvement directions. The results improvement directions are as follows. 1. Many kinds of new construction were set up through the amendments of Landscape Standard Specification, but there are still needs to combine some construction categories because of mismatches between upper and lower categories. 2. Although the Landscape Standard Specification was revised to be more concrete, the contents there remains an ambiguous expression. So, standard specification is needed to revise a depth of earth ball or strength of support materials and quantify collect period of topsoil and application time. In addition, standards about following supervisor's instruction should be more detailed or deleted. 3. The standard specification has not been specified despite enactment and amendments reflecting the periodical paradigm and the needs of users, so it is still needed to revise. In addition, quality levels, planting periods, size of earth ball and performance criteria of tree materials are needed to revise. Each specific classification and construction methods were made by amendments of standard specification, but some standards are not clear and concrete. Therefore, the standard specification is needed to revise the classification system, technique methods, and problem deduction of quality levels and proposal of improvement. This study will be reference material when Landscape Standard Specification is revised.

• Journal of Digital Convergence
• /
• v.13 no.11
• /
• pp.179-185
• /
• 2015

In this paper, we research the IPTV that is the convergence technique of TV and network technique and performed the performance evaluation of picture quality of IPTV in the situation of increasing the network traffic in the Internet environment. To do this, we constructed the mock Internet network similar to the real Internet environment and measured the quality of received video using V-Factor model according to the increase of network traffic, and analyzed the result of the experiment. Making use of the result of this paper for the threshold value of V-Factor, the measured factor of network performance, the measured factor of video performance in the watchable IPTV video quality.

• Journal of KIISE:Information Networking
• /
• v.37 no.6
• /
• pp.494-498
• /
• 2010

Performance requirements of a system are usually closely related to the quality of service provided by the system. The call success rate of a mobile communication system is, for example, directly linked with the quality of call service. Therefore, meeting the performance requirements is one of the critical issues during the operation of services as well as in system development. In this paper, we present a testing method for evaluating the call success rate of a mobile communication system by using interval estimation. Also we analyze the criterion used in the evaluation of the quality of 3G mobile communication services which was recently performed by Korea Communications Commission and then discuss the problems.

• Journal of Industrial Convergence
• /
• v.22 no.1
• /
• pp.177-183
• /
• 2024

The study investigates the impact of data quality on the performance of artificial intelligence (AI). To this end, the impact of labeling error levels on the performance of artificial intelligence was compared and analyzed through simulation, taking into account the similarity of data features and the imbalance of class composition. As a result, data with high similarity between characteristic variables were found to be more sensitive to labeling accuracy than data with low similarity between characteristic variables. It was observed that artificial intelligence accuracy tended to decrease rapidly as class imbalance increased. This will serve as the fundamental data for evaluating the quality criteria and conducting related research on artificial intelligence learning data.

• Ecology and Resilient Infrastructure
• /
• v.3 no.2
• /
• pp.110-116
• /
• 2016

The rapid expansion of buildings and paved roads increases the risk of flood disaster in an urban area. One of the solutions can be the use of permeable pavements. This study evaluated the permeability of permeable blocks used for the roadway pavement. Joint fillers and mat sands of the investigated blocks met the corresponding standards. The flexural strength of the blocks was 5.29 MPa to meet these standards. Based on interior permeability test results after pollution, the four products evaluated were categorized into the following three levels: One for the $1^{st}$ level, one for the $2^{nd}$ level and two for the $3^{rd}$ level. From the field permeability test and pervious concrete infiltration test results nine months after their construction, all the products except one passed the quality standards of 0.1 mm/s.

• Journal of the Korean Crystal Growth and Crystal Technology
• /
• v.27 no.4
• /
• pp.167-172
• /
• 2017

In this study, high performance patching repair mortars with light weight and sulfuric acid resistance properties were suggested. Their performance estimation were investigated based on KS F 4042 using patching repair mortar with light weight aggregate and soluble polymer of Type I and sulfuric acid resistance mortar of Type II, From these results, it was confirmed that these motors were satisficed and improved by all standard tests of KS F 4042.

• Resources Recycling
• /
• v.30 no.3
• /
• pp.55-62
• /
• 2021

In Korea, a good recycled product (GR) certification system was introduced in 1997 to improve resource and energy use efficiency. However, in industry and society, recycled products are not used well because of the lack of awareness of recycled materials. In this study, the status of domestic and international quality standards for nickel materials was investigated, and the purity and electrochemical properties of nickel sulfate prepared from ore and nickel sulfate recovered from waste lithium-ion batteries were evaluated during the electroplating process. As a result of the test, it was found that there is no quality difference between recycled nickel sulfate and high-purity nickel sulfate reagents when used in the electroplating industry.