• International journal of advanced smart convergence
• /
• 제8권3호
• /
• pp.27-38
• /
• 2019

I reviewed about dyeing fastness and functional properties of the non-mordant dyed cotton and iron mordant dyed cotton with astringent persimmon juice. In the UV-VIS spectrum of astringent persimmon juice, the maximum absorption wavelength of the juice was 272.0 nm, which was a characteristic peak of tannin. In dyeing fastness, light fastness of the non-mordant dyed cotton was a little low at grade 2~3. But by the iron mordant treatment, the light fastness was good at grade 4. Dry cleaning fastness to discoloration and contamination was excellent at grade 4~5 for both the non-mordant dyed cotton and iron-mordant dyed cotton. Their rub fastness were grade 3 and grade 2~3 respectively, in the dry condition, and grade 2~3 and grade 3 respectively, in the wet condition. In the perspiration fastness of the non-mordant dyed cotton, the discoloration from acidity and alkalinity was grade 3~4 and grade 3, respectively, and contamination from acidity and alkalinity was relatively good at grade 4. Meanwhile, in the perspiration fastness of the non-mordant dyed cotton, discoloration from acidity and alkalinity was fair, both recording grade 3~4, and contamination from acidity and alkalinity was very good, both recording grade 4~5. In the ultraviolet protection effect of the non-mordant dyed cotton and iron-mordant dyed cotton, the ultraviolet protection factor was both 50+, both of which showed an excellent ultraviolet blocking effect. And the protection rate of UV-A appeared 98.4% and 99.1%, respectively, and the protection rate of UV-B showed 98.7% and 99.2, respectively. In addition, both exhibited an excellent deodorization rate over 99.9% or more, irrespective of the passage of time. Also, both showed an excellent antimicrobial activity over 99.9% or more against Staphylococcus aureus and Klebsiella pneumoniae.

• 한국사회정책
• /
• 제25권4호
• /
• pp.125-161
• /
• 2018

본 연구는 비정규직 보호법의 시행이 비정규직의 노동시장 차별 개선에 기여하였는지 실증적으로 규명한 연구이다. 이때 기존 연구와 달리, 임금뿐 아니라 사회보장 혜택을 포괄하여 비정규직에 대한 차별 시정 효과를 살폈다. 이는 사용자의 고용 관련 의사결정에 영향을 미치는 노동비용에 사회보장기여금 부담도 상당한 부분을 차지하기 때문이다. 분석에서는 기업을 분석 단위로 하여 기업 규모별 시행 시기의 차이를 반영한 패널토빗모형을 적용하였다. 분석 결과, 비정규직 보호법이 일부 심각한 사회보장 배제를 경험한 집단에서 차별 개선의 효과를 가졌다. 하지만 이는 제한적인 효과로 전반적으로 비정규직 보호법이 임금과 사회보장에서 차별 해소에 기여했다고 보기는 어렵다. 게다가 비정규직 내부에서도 특히 임금과 사회보장 차별에 취약한 집단들이 존재한다. 이와 같은 비정규직에 대한 임금과 사회보장 차별이 이들의 삶의 질과 직결된다는 점을 감안할 때, 이들에 대한 차별 해소를 위한 적극적인 제도 개선 노력이 필요하다. 이에 본 연구에서는 비정규직 보호법의 차별을 정당화하는 이유를 제한하는 것과 함께 차별 금지 영역에 대한 개방적 접근 및 보완적 크레딧 제도의 도입 그리고 비정규직 사용 사유 규제를 적극적으로 검토할 것을 제안한다.

• Journal of Radiation Protection and Research
• /
• 제20권3호
• /
• pp.201-213
• /
• 1995

비이온화방사선(NIR)에 대한 방어는 증가되는 관심의 주제가 되고 있지만, 방사선의 유형이나 그 적용간의 의존되는 아주 다른 개념의 사용은 이 분야에서의 통일된 방법의 자료편집에 어려움을 주고 있다. 이 논문의 주된 목적은 비 이온화방사선 방어의 목적으로 확실하게 사용하는 개념, 양, 단위 및 전문용어를 제공하기 위해서이다. 그 외에 방사선방어의 표준과 피폭한도를 양으로 나타내는데 사용되는 특별한 개념과 주어진 양들의 체계적인 분류와 비교를 요약하고 또 논하였다.

• 터널과지하공간
• /
• 제6권3호
• /
• pp.260-266
• /
• 1996

Safety concern is one of the most important parameters in the design of explosive building demolition. Laboratory experiments were performed to investigate the failure behaviour of concrete columns and the effects of protection materials. Fourteen reinforced columns with two sizes were constructed and the effects of protection materials were tested for two kinds of materials: non woven fabrics and wire net. The results showed that control of gas effects is a key to the control of flying chips. It was recommended to use both wire net and non woven fabrics as primary and secondary protection materials. Such protection method was successfully applied to the explosive demolition of 16 and 17-strory apartment buildings.and the results of a simulation on a model tunneling workings using diesel equipments are introduced. In case of typical model of tunneling face, the gas concentration of human height is about one third of roof concentration and right side half of the tunnel shows better environment than left half. NOx concentration of workings can be estimated about 0.45ppm which is much lower than permissible level(5 ppm).

• Journal of electromagnetic engineering and science
• /
• 제6권3호
• /
• pp.189-195
• /
• 2006

In this paper, the derivation of the protection ratio for the digital microwave system with diversity is newly suggested for a basic guidance of initial planning for frequency coordination, and computational results are presented for an actual radio frequency band. The net filter discrimination has been also examined to see the effect of the adjacent channel protection ratio caused by adjacent channel interference. In addition, the protection ratios for the space or frequency diversity system are analyzed in terms of diversity improvement factors to find out an equivalent allowable noise-to-interference ratio (N/I) from degraded fade margin. According to results for 6.2 GHz system, with the space diversity of 25 m distance between antennas or the frequency diversity of ${\Delta}f/f=0.05$, under 64-QAM and 60 km at BER $10^{-6}$, the protection ratio can be greatly reduced in comparison to the non-diversity system. So, assuming that only the same protection ratio as the non-diversity system is kept, it is shown that the system with diversity may get more interference level of N/I allowing from 9.0 to - 5.9 dB or from 6.0 to - 4.3 dB for the space or frequency diversity. In consequence, it is concluded that the diversity system is more robust or tolerable for interferences or fades, which may play an important role in overcoming N/I to some extent.

• 디지털산업정보학회논문지
• /
• 제17권1호
• /
• pp.35-44
• /
• 2021

With the development of information technology, the cybersecurity threat continues as digital-related technologies are applied to the instrumentation and control system of nuclear power plants. The malfunction of the instrumentation and control system can cause economic damage due to shutdown, and furthermore, it can lead to national disasters such as radioactive emissions, so countering cybersecurity threats is an important issue. In general, the study of cybersecurity in instrumentation and control systems is concentrated on safety systems, and diverse protection systems perform protection and reactor shutdown functions, leading to reactor shutdown or, in the worst case, non-stop situations. To accurately analyze cyber threats in the diverse protection system, its linked facilities should be analyzed together. Risk analysis should be conducted by analyzing the potential impact of inter-facility cyberattacks on related facilities and the impact of cybersecurity on each configuration module of the diverse protection system. In this paper, we analyze the linkage of the diverse protection system and discuss the cybersecurity linkage threat by analyzing the availability of equipment, the cyber threat impact of the linked equipment, and the configuration module's cybersecurity vulnerability.

• Journal of Information Processing Systems
• /
• 제12권3호
• /
• pp.538-547
• /
• 2016

Cloud computing is a new style of computing in which dynamically scalable and reconfigurable resources are provided as a service over the internet. The MapReduce framework is currently the most dominant programming model in cloud computing. It is necessary to protect the integrity of MapReduce data processing services. Malicious workers, who can be divided into collusive workers and non-collusive workers, try to generate bad results in order to attack the cloud computing. So, figuring out how to efficiently detect the malicious workers has been very important, as existing solutions are not effective enough in defeating malicious behavior. In this paper, we propose a security protection framework to detect the malicious workers and ensure computation integrity in the map phase of MapReduce. Our simulation results show that our proposed security protection framework can efficiently detect both collusive and non-collusive workers and guarantee high computation accuracy.

• Entomological Research
• /
• 제48권5호
• /
• pp.372-383
• /
• 2018

Leptocimbex formosanus group of Leptocimbex Semenov 1896, Cimbicidae is defined and the relationships and characteristics are provided. Two new species of this group are described from Hunan and Yunnan Provinces in China: Leptocimbex shinoharai Yan & Wei sp. nov. and L. naitoi Yan & Wei sp. nov. Redescriptions of the three known species of L. formosanus group (L. formosanus Enslin 1911, L. dendrobii Rohwer 1915 and L. nigropropodea Wei & Deng 2002) and a key to all known species of this group are provided.

• 한국화재소방학회:학술대회논문집
• /
• 한국화재소방학회 1996년도 학술발표회
• /
• pp.19-23
• /
• 1996

This paper, as a part of reviewing the adequacy of reflecting the fire protection systems in calculating fire insurance premium, deals with the relations between the probability of fire accidents and the capability of fire protection systems in buildings

• 방재기술
• /
• 통권17호
• /
• pp.24-32
• /
• 1994

This article introduces the transition of SOLAS (The International Convention for the Safety of Life Sea) safety regulations for fire protection, fire detection and fire extinction in ships. And also the regulations and the related IMO fire test rules applied to products such as fire sep-arate walls and non-combustible materials for interior to prevent fire spread on the ship fire are summarized.