• 정보처리학회논문지C
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• 제12C권1호
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• pp.129-136
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• 2005

웹데브(WebDAV)는 HTTP/1.1의 확장된 프로토콜로서 인터넷을 통하여 분산된 저작과 버전관리를 지원한다. 웹데브의 주요 기능인 속성관리는 저장소의 역할과 함께 자원의 추가 정보를 관리하고 활용할 수 있는 장점을 가지고 있다. 지금까지 대부분의 웹데브를 지원하는 응용 시스템은 속성 관리 기능의 활용보다는 단순 저장소의 역할로 웹데브를 사용하고 있다. 그러나 협업 지원 시스템과 같은 웹데브 기반의 고급 응용 프로그램을 개발하기 위해서는 웹데브 사용자 정의 속성의 설계와 활용이 매우 중요하다. 본 논문에서는 웹데브 사용자 정의 속성을 정의한 XML 형식의 환경 설정 속성과 그 처리 수행 절차를 기술한 DavSUDP(WebDAV Simple User-defined Property Definition Protocol) 프로토콜을 제안한다. DavSUDP는 웹데브 기반의 응용 시스템을 개발하는데 있어서 웹데브 서버가 사용자 정의 속성을 효과적으로 관리할 수 있게 하여준다. 이를 보이기 위하여 아파치의 $mod{\_}dav$ 모듈이 DavSUDP를 지원하도록 확장하였으며, 이를 이용하여 iPlace 협업 지원 시스템의 공개작업장을 개발하였다.

• 대한토목학회논문집
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• 제39권3호
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• pp.441-449
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• 2019

최근 국내에서 경주지진(2016.09)과 포항지진(2017.11) 등 규모 5.0 이상의 지진이 발생하여 구조물의 내진안전성에 대한 관심이 증가하고 있다. 특히, 인명피해나 재산손실을 유발하는 생활시설물은 더욱 중요성이 강조되고 있다. 생활시설물 중 가스와 유류 등의 저장시설물이 있으며 물을 저장하는 탱크가 대표적이다. 본 연구에서는 액체저장탱크의 내진성능향상을 위해 면진의 일종인 납고무받침(Lead Rubber Bearing)을 적용하고자 한다. 액체저장탱크의 기초를 고려하여 납고무받침을 설계하였으며, 실험체를 제작하여 압축 및 전단특성실험을 통해 납고무받침의 일반적 물성을 확인하였다. 납고무받침에 대한 내구성 실험 이후 진동대 실험 및 ANSYS를 이용한 유한요소해석을 통해 비면진 및 면진 적용에 따른 액체저장탱크의 거동을 분석하였다.

• 감성과학
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• 제18권1호
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• pp.49-58
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• 2015

본 연구는 감성의류용 탄화지르코늄 함유 축열 니트의 원적외선 특성을 연구하였다. 탄화지르코늄 함유 축열 PET 원사가 이성분 방사법에 의해 방사되었다. 이 원사의 core부에는 고점도 PET와 탄화지르코늄을 혼합한 용액을, sheath부에는 저점도 PET 용액을 사용하여 콘쥬게이트 방사를 실시하였다. 이들 방사된 원사의 원소분석과 원적외선 특성 분석이 EDS와 FT-IR 계측기기에 의해 분석되었으며 두 가지 조직의 니트 소재를 편직하여 이들의 열적특성을 분석하였다. EDS 분석에서 Zr 피크를 확인하였으며 원사내에 Zr 원소가 19.29% 함유되어 있음을 확인하였다. 또한 원적외선 분석에서 $5{\sim}20{\mu}m$ 파장 영역에서 원적외선 방사에너지가 $3.65{\times}10^2W/m^2$, 방사율이 0.906 임을 확인하였다. KES-F7 측정기 분석에서 ZrC 함유 편성물의 Qmax 값이 일반 PET 편성물의 값보다 낮은 값을 보였고 보온율 값은 ZrC 함유 편성물이 일반 PET보다 더 높은 값을 보이므로서 ZrC의 축열성을 확인하였다. 열전도도는 Zr의 높은 열전도도 때문에 일반 PET 편물보다 더 높은 값을 보였다. ZrC의 함유가 편물의 촉감에 미치는 영향을 없었으며 편성 조직이 더 큰 영향을 주는 것을 확인하였다.

• Journal of the Korean Wood Science and Technology
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• 제48권3호
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• pp.291-302
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• 2020

As the properties of the melamine-urea-formaldehyde (MUF) resins were changing during their storage time, this study investigated the impacts of the synthesis method and melamine content of the MUF resins on the pH, apparent viscosity, molecular weights, and crystallinity to estimate these properties over storage times of up to 30 days. Melaminesat three addition levels (5, 10, and 20 wt% based on the resin solids) were simultaneously reacted with urea and formaldehyde (MUF-A resins), while those at the same addition levels were first reacted with formaldehyde and then with urea(MUF-B resins). The pH values of the MUF-A and MUF-B resins decreased linearly as the storage time increased; the apparent viscosity increased linearly for the low melamine contents (5% and 10%) but increased exponentially for 20%. As anticipated, the molecular weights (Mw and Mn) increased linearly with the storage time, with a steeper increase in the Mw of the MUF-B resins compared with that of the MUF-A resins. The crystallinity of the two resin types decreased with storage time at higher melamine content. The relationships between these properties and the storage time made it possible to estimate the property changes in these resins synthesized by the different synthesis methods and melamine contents; this could help predict the properties of such resins in the industry during their storage.

• 한국산학기술학회:학술대회논문집
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• 한국산학기술학회 2010년도 춘계학술발표논문집 2부
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• pp.949-952
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• 2010

The utilization of LPG(Liquefied Petroleum Gas) is increasing as an environmental-friendly fuel in all countries making green growth new paradigm, and use of gas is spread fast as motor fuels to decrease air pollution. Loss of lives by explosion and fire is happening every year as gas use increases, and gas accident in large scale storage property is causing serious problems socially. To minimize this problem, underground containment type storage tank is being presented as an alternative recently. In this study, to minimize explosion occurrence in underground containment type storage tank, the suitable storage tank is designed to consider explosion prevention that makes exposure surface area minimize in confined contents volume and flame to construct storage tank by the most suitable condition in the underground containment room. As a result of the design of storage tank having the most suitable condition by this research, underground containment space was minimized on diameter 3m, length 4.83m in 20 tons storage tank and its safety was improved as exposure surface area in flame decreased by 89.4%, compared with the existent storage tank.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제13권6호
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• pp.3238-3257
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• 2019

Closed-circuit television (CCTV) technology continuously captures and stores video streams. Users are typically required by policy to store all the captured video for a certain period. Accordingly, increasing the number of CCTV operation cycles and photographing positions expands the amount of data to be stored. However, expanding the available storage space for video data incurs increased costs. In recent years, this problem has been addressed with cloud storage solutions, which enable multiple users and devices to access and store data simultaneously. However, because of the large amount of data to be stored, a vast storage space is required. Consequently, cloud storage administrators need a way to store data more efficiently. To save storage space, deduplication technology has been proposed to prevent duplicate storage of the same data. However, because cloud storage is hosted on remote servers, data encryption technology must be applied to address data exposure issues. Although deduplication techniques for encrypted data have been studied, there have been various security vulnerabilities. We attempted to solve this problem by addressing various issues such as poison attacks, property forgery, and ownership management while removing the redundant data and handling the data more securely.

• Food Science and Biotechnology
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• 제14권4호
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• pp.487-492
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• 2005

Simple competition plate bioassays of Pichia anomala SKM-T and Galactomyces geotrichum SJM-59 were conducted to evaluate their potential as biological control agents that inhibit growth of Botrytis cinerea during post-harvest storage of strawberries (Fragaria ${\times}$ ananassa Duche, Red-Pearl). Occurrence rates of fungi on the surface of yeast-treated strawberries were evaluated during storage at $4^{\circ}C$. P. anomala SKM-T and G. geotrichum SJM-59 showed antifungal activities on agar plate, and P. anomala SKM-T maintained its desirable antifungal activity on surface of strawberries and its physicochemical properties during storage. Sensory evaluation was based on kinesthetics and consumer acceptability. Due to its potential antifungal activity, P. anomala SKM-T could function as biological control agent against spoilage fungi during post-harvest storage of strawberries.

• 한국식품영양과학회지
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• 제28권4호
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• pp.865.1-870
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• 1999

This study was carried out to use the shrink discharged during process of smoke meat products. Qualities of sausage were grasped, and investigated storage properties during five weeks. The gel strength of pork sausage were 1,461~1,847g.cm, this of chicken sausage were 865~1,733g.cm. The cooking yield of sausage were 81~ 85% in general, contents of salt were 2.5~2.9%. The L value(lightness) of pork sausage were 44.8~47.2, those of chicken sausage were 43.1~48.0, and the L value of the interior was higher than the surface. The remainder contents of nitrite were 3.1~9.4ppm, the sorbic acid contents of all sausage were 0.8g/kg. The amino acid contents of chicken sausage were higher than those of pork sausage. The pH of sausage not changed uniformly during storage. The TBA value and the VBN contents were a slight tendency to increase during storage. The total plate counts of all sausage maintained 104 less than during storage.

• 한국가구학회지
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• 제28권3호
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• pp.135-144
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• 2017

The development of human civilization has been accompanied by a corresponding development of storage facilities. In particular, the storage of residential spaces not only performs the storage management function for personal property but also is considered an important prerequisite for a comfortable life. While examining the history of the transformation of built-in furniture, this study emphasizes the social and cultural implications of Korean residences. Therefore, We attempt to uncover the Korean characteristics that can be discovered in the transformation of storage furniture according to the changes that occurred in Korean residential forms following the modern era and to question the problematic issues of the built-in furniture in Korea.

• 정보저장시스템학회논문집
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• 제3권4호
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• pp.167-172
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• 2007

The recently-developed off-line learning control approaches for the rejection of periodic disturbances utilize the specific property that the learning system tends to oscillate in steady state. Unfortunately, the prior works have not clarified how closely the learning system should approach the steady state to achieve the rejection of periodic disturbances to satisfactory level. In this paper, we address this issue extensively for the class of linear systems. We also attempt to remove the effect of other aperiodic disturbances on the rejection of the periodic disturbances effectively. In fact, the proposed learning control algorithm can provide very fast convergence performance in the presence of aperiodic disturbance. The effectiveness and practicality of our work is demonstrated through mathematical performance analysis as well as various simulation results.