• Fire Science and Engineering
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• v.30 no.4
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• pp.20-26
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• 2016

When the fire takes place in Nuclear Powr Plants(NPPs), the reactor should achieve and maintain safe shut-down conditions and minimize the radioactive material released to the environment. The U.S. Nuclear Regulatory Commission (NRC) has issued numerous generic communications related to fire protection over the past 20 years, after it issued its requirements in the Fire Protection Rule set forth in Title 10, Section 50.48 of the Code of Federal Regulations (10 CFR 50.48) and Appendix R to the 10 CFR 50. The and Nuclear Energy Institute (NEI) has developed a Methodology for Risk Informed Fire Safe-Shutdown Analysis, which is related to the Deterministic Method for Multiple Spurious Operations solutions. The aim of this study was to identify, achieve, and maintain Post-Fire Safe-Shutdown of the Main Control Room (MCR) of the CANDU reactor, even though one train of the multiple Safety Structures, Systems, and Components (SCCs) fail by the technical specification and analysis method.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.15 no.8
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• pp.5248-5255
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• 2014

Because of the rapid growth of smart phone market, the number of mobile applications has increased exponentially. As mobile applications are developing at a rapid rate, many of them are being developed without considering a systematic development process or quality factors, such as reusability, extensibility, etc.. As a result, they have many faults internally, they are being underrated in satisfaction or reliability from customers, and finally customers do not update or repeat the purchase. Therefore, a meta-model of development process for mobile applications was designed to improve the continuous usability of mobile applications as well as the satisfaction and reliability from users. Applying development process based on a meta-model to mobile application development is expected to improve development productivity and quality of mobile applications.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2005.11a
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• pp.127-130
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• 2005

우수한 이동수신 성능을 지닌 지상파 DMB(T-DMB: Terrestrial-Digital Multimedia Broadcasting)의 킬러앱(Killer App)이라 불리는 교통 및 여행정보(TTI: Traffic and Travel Information) 서비스는 주 5일 근무제 실시와 지속적인 자동차수 증가로 인해 그 중요성이 부각되고 있다. 지상파 DMB 기반의 TTI 서비스 전송을 위한 프로토콜로 국제 표준인 TPEG(Transport Protocol Expert Group)이 유력시 되고 있으나, 현재 국제 표준화가 완료된 서비스 규격으로는 속도 ${\cdot}$ 유고정보 및 대중교통수단 관련 정보 전송이 가능한 RTM(Raod Traffic Message)과 PTI(Public Transport Information) 뿐이다. 국내의 경우, 속도 정보 제공을 위한 새로운 서비스 규격으로 CTT(Congestion and Travel Time Information)에 대한 표준화 작업이 진행 중에 있다. 최근 이동통신 인프라 대신 지상파 DMB를 기반으로 한 새로운 위치기반서비스의 규격 제정의 필요성이 대두되었으며, 이에 따라 이를 위한 국내 표준화 활동이 본격적으로 추진될 예정이다. 본 논문에서는 기존 TPEG 규격과 완벽히 호환되는 위치기반서비스 전송을 위한 새로운 POI(Point Of Interest) 프로토콜을 제안하였다. 이의 검증을 위해 POI 데이터 서비스 저작 및 전송서버 및 POI 수신 플랫폼을 설계 ${\cdot}$ 구현하여 송수신 플랫폼을 구성하였으며, 구축된 플랫폼을 이용한 방송실험을 통해 제안된 POI 서비스 응용 프로토콜의 안정성 및 전송 효율성을 확인하였다.

• Korean Journal of Social Welfare
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• v.58 no.2
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• pp.119-141
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• 2006

This study aims to explore the status and characteristics of the working poor and to identify the major determinants of their statistic status. For this, longitudinal panel data (from 2nd wave(1999) data to 7th wave(2004) data) from Korean Labor and Income Panel Study (KLIPS), is used. The data is analyzed by adopting Hierarchical Generalized Linear Model (HGLM), which is known as an app.opriate data analysis method for the hierarchically structured data, to look at the factors that affect on the poverty status of the working people. The results show that 1) it is estimated that about 1 out of 10 working people (about 10.0%) are poor, and 2) sex, education level, marital status, region where they lives, employment status, occupation type, and industry type that they are working at are significant predictors in determining their poverty status. Unlike the results of the previous studies, however, the number of the household member, age are not influenced on their poverty status. Based on these results, several policy implications are presented at the end of this paper.

• Journal of the Korea Society of Computer and Information
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• v.16 no.6
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• pp.155-164
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• 2011

APP based on the smart phone is being utilized to various scopes such as medical services in hospitals, financing services at banks and credit card companies, and ubiquitous technologies in companies and homes etc. In this service environment, exposures of smart phones cause loss of assets including leaks of official/private information by outsiders. Though secret keys, pattern recognition technologies, and single image authentication techniques are being applied as protective methods, but they have problems in that accesses are possible by utilizing static key values or images like pictures. Therefore, this study proposes a face authentication technology for protecting smart phones from these dangerous factors and problems. The proposed technology authenticates users by extracting key frames of user's facial images by real time, and also controls accesses to the smart phone. Authentication information is composed of multiple key frames, and the user' access is controlled by distinction algorism of similarity utilizing DC values of image's pixel and luminance.

• YAKHAK HOEJI
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• v.55 no.1
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• pp.39-44
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• 2011

Many reports indicate that $18{\beta}$-glycyrrhetinic acid ($18{\beta}$-GA) from Glycyrrhizae Radix has anti-inflammatory and immunoregulatory activities, whereas reports regarding anticancer activity of the compound are few. In present study, we investigated antitumor effect of $18{\beta}$-GA on tumor caused by A549 cancer cell in mice. Data resulting from the cytotoxicity assay showed that $18{\beta}$-GA caused killing of A549 cells. $LD_{50}$ values of $18{\beta}$-GA were app. 180 ${\mu}M$ and 80 ${\mu}M$, corresponding to 48 hr- and 72 hr-treatments, displaying that the killing activity was more effective as the $18{\beta}$-GA treatment was prolonged. Based on these data, antitumor effect of $18{\beta}$-GA was tested in nude mice. For induction of the tumor, A549 ($3{\times}10^6$ cells/mouse) was injected subcutaneously into the lateral abdomen of nude mice (Balb/c nu/nu). To determine the antitumor effect, nude mice with tumor were given $18{\beta}$-GA (1 mg/200 ${\mu}l$/mouse) intraperitoneally every three days for four times. Tumor-sizes were measured with a caliper for a period of 24 days. Results showed that the $18{\beta}$-GA treatment reduced the tumor-sizes (P<0.05) as compared with negative control nude mice that received diluent (DPBS). The reduction degree was greater than reduction degree by doxorubicin (60 ${\mu}g$/mouse), and the pattern of reduction was almost sustained during the entire period of the observation. In conclusion, our studies demonstrate that $18{\beta}$-GA has antitumor activity to the A549 cancer cell-caused tumor.

• Journal of Digital Contents Society
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• v.17 no.1
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• pp.33-41
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• 2016

This study aims to suggest practical ways to interact effectively with consumers based on current situation of 'media creative' and media use patterns. Cases of digital signage are reviewed in the perspective of cross media, and the strategic meanings of cross media are explored according to interactivity. Results are collected through 'Naver' search engine service, and can be possibly assorted into five media combined types: SNS-combined, QR codes or Augmented Reality(AR)-combined, Brand App(application)-combined, Online to Offline-combined, and Behavioral factors-combined ones. Some strategic suggestions on media creative are given for effective interaction with consumers.

• Korean journal of applied entomology
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• v.59 no.2
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• pp.139-143
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• 2020

A survey was conducted among pet owners visiting pet hospitals, using a pet animal app, or being involved in pet breeding, who had the awareness of and intention to purchase animal feed containing edible insects, as well as functional pet food. Results showed that 89.5% of survey participants were pet owners such as those of dogs, cats etc., of whom 55.6% knew about this type of pet food. Nearly half (48.5%) of respondents had an intention to purchase edible insect-based pet food, while the rest of them (51.5%) did not. The two main reasons for deciding to buy it were the excellent nutritional value of insects, and low allergenicity. The most significant reason for refusing purchase was a strong aversion to insects as food.

• The Journal of Society for e-Business Studies
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• v.16 no.4
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• pp.173-195
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• 2011

The ability of offering various and abundant mobile applications has emerged as the knowledge of the smartphone has grown in the smartphone market. The mobile application market has emerged as a competitive new market with enormous potential. Although many users download paid or free mobile applications through the app markets such as the Appstore, there is no significant research regarding customer's application purchase yet. Hence, we refer to the purchase motivation of mobile applications among experienced users who have bought paid applications. We conducted the interview with 30 users and suggest four categories of applications (productivity, entertainment, information, and social networking) and also classify the purchase intentions on each category based on the ground theory. The comparison analysis of the interview provides us what factors affect the application purchase. This framework may advance effective mobile application business model development, implicate the strategy for boosting mobile application market.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.18 no.6
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• pp.1395-1400
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• 2014

Diligence/Indolence records are the key data for a human resource management and the basic data to measure the salaries of the employees. However, existing mechanical or electro-magnetic diligence/indolence management systems have the problems that the systems are often incorrect or require much cost to build them. In this paper, we design and implement the diligence/indolence management system using a smart device of an employee. To measure the data of the diligence/indolence, the implemented system acquires the location data of the employee using the MAC addresses of both a smart device and access points of the WiFi and transfers the data of punching-in/out based on the acquired location to a server. The benefit of the proposed system is that it is easy for small business to use the proposed D/I management system with low cost because the system exploits smart devices and WiFi access points installed previously.