• Title/Summary/Keyword: Network life time

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An Experimental Study of Polypropylene Fiber for the Prevention of Explosive Spalling of Tunnel Concrete Lining (터널 콘크리트 라이닝 폭열 방지를 위한 폴리프로필렌 섬유 혼입율 분석 연구)

  • Kim, Nag Young;Shim, Jae Won;Shim, Jong Sung;Won, Jong Phil
    • Journal of Korean Tunnelling and Underground Space Association
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    • v.7 no.4
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    • pp.323-333
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    • 2005
  • Recently the fire is happening at the tunnel and underground - structure internationally. We are socially the economy the actual circumstances which serious loss is happening due to an fire occurrence when fire happened which is closed like tunnel and underground - structure, the collapse from the burglar degradation of strength of tunnel concrete lining and human life damage happen. It causes big problem while the long time disconnects a traffic network. While the fire happened in this research at the tunnel, the paper construct a basis data to deduce the specification regulation about stability of tunnel concrete lining. In this paper, the experiment was carried out for the prevention of explosive spalling of tunnel to use a reinforced Polypropylene concrete which mixes a Polypropylene which are known for the thing by being efficient at a protect of explosive spalling of the concrete. According to the firproof test result of reinforced Polypropylene admixture mortar, Polypropylene admixture of prevention of explosive spalling analyzed 0.2%-0.25%.

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Non-specific Immune Response of Rainbow Trout (Oncorhynchus Mykiss) by Dietary Heat-inactivated Potential Probiotics

  • Choi, Sang-Hoon;Yoon, Taek-Joon
    • IMMUNE NETWORK
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    • v.8 no.3
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    • pp.67-74
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    • 2008
  • Background: The effects of the dietary administration of two heat-inactivated whole bacteria from the Vibrionaceae family, singly or combined, on innate immune response of the rainbow trout were studied. The two bacteria (Pdp11 and 51M6), which were obtained from the skin of rainbow trout, showed in vitro characteristics that suggested they could be considered as potential fish probiotics. Methods: The fish were fed four different diets: control (non-supplemented), or diets supplemented with heat-inactivated bacteria at $10^8$ cfu/g Pdp11, $10^8$ cfu/g 51M6 or with $0.5{\times}10^8$ cfu/g Pdp11 plus $0.5{\times}10^8$ cfu/g 51M6 for 4 weeks. Six fish were sampled at weeks 1, 2, 3 and 4, and then the main humoral (natural haemolytic complement activity and serum peroxidase content) and cellular innate immune responses (leucocyte peroxidase content, phagocytosis, respiratory burst and cytotoxicity) were evaluated. Results: The serum peroxidase content and the natural haemolytic complement activity increased with time, reaching the highest values in the third and fourth weeks of feeding, respectively. The phagocytic ability of specimens fed the mixture of the two inactivated bacteria was significantly higher than in the controls after 2 and 3 weeks of treatment. The same activity increased significantly in rainbow trout fed the Pdp11 diet for 2 weeks or the 51M6 diet for 3 weeks. Respiratory burst activity was unaffected by all the experimental diets at all times assayed. Cytotoxic activity had significantly increased after 3 weeks in fish fed the 51M6 diet. Conclusion: Our results demonstrated the usefulness of incorporating inactivated probiotic bacteria into fish diets.

An Analysis of the Job and Competency of the Healthy Family Supporter as a Middle Manager on the Healthy Family Support Center (건강가정지원센터 중간관리자급 건강가정사의 직무현황과 역량분석)

  • Lee, Yoon-Jung
    • Korean Journal of Human Ecology
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    • v.18 no.4
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    • pp.809-824
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    • 2009
  • The purpose of this study is to examine the contents and concept of program for healthy family and provide job opportunity and competency of healthy family supporter. For this research, participants are 51 healthy family supporters as a middle manager. Data were obtained through the survey using a questionnaire developed by the ministry of women and family and headquarter of healthy family support centers in 2007. The research process consists of two parts. One is to suggest their jobs and requirements, the other is to offer their core competency and area for improvement. First, the jobs of healthy family supporters as a middle manager are the generalization of team's work including the planning, management and coordination, training for the staff, and network of social resources. They recognized the planning and management of healthy family support center's goal and course as a strategic job. The requirements for the performance of their duties are having a bachelor's or a master's degree, career more than for 3 years, and a certificate of qualification of healthy family supporters, social worker and family counselor. Second, their competencies are the understanding of education of family life, theory of family counselling, the planning and valuation of program for healthy family, understanding for the variegated family, management of organization, networking with resources, ability of documentation, ability of persuasion and negotiation, management of time, sociality, communication skill, solving the problem, positiveness, cooperative spirit and so on.

Groundwater Recharge Assessment via Grid-based Soil Moisture Route Modeling (격자기반의 토양수분 추적에 의한 지하수함양량 추정기법 개발)

  • Kim, Seong-Jun;Chae, Hyo-Seok
    • Journal of Korea Water Resources Association
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    • v.33 no.1
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    • pp.61-72
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    • 2000
  • The purpose of this study is to improve the method of evaluating groundwater recharge by using grid-based soil moisture routing technique. A model which predicts temporal variation and spatial distribution of soil moisture on a daily time step was developed. The model uses ASCII-formatted map data supported by the irregular gridded map of the GRASS(Geographic Resources Analysis Support System)-GIS and can generate daily and monthly spatial distribution map of surface runoff, soil moisture content, evapotranspiration within the watershed. The model was applied to Ipyunggyo watershed($75.6\;\textrm{km}^2$) located in the upstream of Bocheongchun watershed. Seven maps; DEM(Digital Elevation Mode]), stream, flow path, soil, land use, Thiessen network and free groundwater level, were used for input data. Predicted streamflows resulting from two years (l995, 1996) daily data were compared with the observed values at the watershed outlet. The results of temporal variations and spatial distributions of soil moisture are presented by using GRASS GIS. As a final result, the monthly predicted groundwater recharge was presented.sented.

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The Effect of Military Crisis Management Communication on a Social Network Service :Focusing on the effect of message form on the crisis perception of soldiers (SNS를 통한 군(軍)의 위기관리 커뮤니케이션 전략 :메시지 형태가 장병의 위기 인식에 미치는 영향을 중심으로)

  • Kim, Tae Woong;Yang, Jong Hoon;Lee, Sang Eun
    • The Journal of the Korea Contents Association
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    • v.19 no.11
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    • pp.102-110
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    • 2019
  • The military respond well to external publics in the event of a crisis int that they are operated based on the trust of the people. Unlike other organizations, however, the Korean military has the distinctiveness that soldiers experience military life as internal publics for a certain period of time and after serving in the army, they become those who evaluate the military as external publics. Therefore, it is important to examine what would be effective crisis management strategies in terms of communicating with active-duty soldiers. Given that active-duty soldiers are accustomed to using SNS these days, this study investigated whether message forms (digital image vs. text) affect the perception of the military in crisis, acceptance of the given message, and attitude toward the military. Our empirical findings suggest that image-based messages are more likely to increase levels of message acceptance than text-based messages. Based on the results, we discussed practical implications on communication strategies for managing the military in crisis.

Extension Strategy for Terrestrial DTV-Internet Hybrid Services Standard (지상파 DTV-인터넷 하이브리드 서비스 표준 확장 전략)

  • Kim, Yunh-Young;Choi, Dae-Hoon;Park, Sung-Choon
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.36 no.12B
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    • pp.1522-1536
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    • 2011
  • Due to the advance of broadband communication networks including the Internet, the release of diverse media, and the busy life cycle of modern people, it became difficult to watch TV programs strictly according to the program schedule. Instead, demand to download and watch the programs at any time on TV is increasing. In order to meet the demand, terrestrial DTV broadcasters developed a TV service which provides various on-demand contents by integrating terrestrial DTV network and the Internet without enforcing viewers to subscribe broadcasting services such as IPTV or CableTV, and standardized it as OHTV(Open Hybrid TV). In this paper, we explain the current status of OHTV standard and worldwide hybrid TV services and their technical standards. We also provide a strategy for the next version of OHTV standard in order to enhance the value of OHTV.

A Study on the Student Surveys for CAAD(Computer Aided Architectural Design) (건축 CAD 과목에 대한 학생 설문평가에 관한 연구)

  • Nam, Yun-Cheol
    • Journal of The Korean Digital Architecture Interior Association
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    • v.12 no.4
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    • pp.117-124
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    • 2012
  • The importance of the digital architecture is increasing more ever. Currently, CAD and 3D programs are used as design fields, but the BIM (building information modeling) is gradually interested. BIM is mandatory on the project more than 50 billion won ordered by the government since 2012, it will be expanded to a total of government orders by 2016. University needs to evaluate teaching methods and computer-aided design environments such as CAD and BIM. In this paper, we surveyed computer-aided design environments and teaching methods for 73 students at the J University of Department of architectural engineering. Main results are as follows: 1. Hardlock is uncomfortable but necessary program for the computer management. 2. The desk placement considering the behavior of the design students results in higher satisfaction. 3. Because a CAD subject was a difficult course content and progress is fast, students thought it is difficult to follow. Especially, first-year students answered it is difficult to learn program and understand the structure of the building at the same time. 4. First-year students want to learn CAD more. Second-, third-, fourth-year students want to learn Photoshop more. Supplement for these classes is required. 5. Students answered that a teaching method of a CAD subject would be good to their own practice after the professor demonstrates for students. The senior's assistance is also a high effective way in the class. 6. During class, students' activities such surfing the web and Kakao Talk on a smartphone disrupt the class, there is a need to regulate by a rule such as disconnect computers from a network and against using smartphone. Although the Internet with the popularization of smartphones confers a benefit on modern life, it causes damage to us. This is a hard part for a salaried workers as well as students studying equally. The self management is required and a professor needs to control and restraint in a university classroom. The professor's continuing interest to students can increase the effectiveness of learning.

A Study on the Management of the Branch and the Publish of Socialist News Magazines (일제하 사회주의 잡지의 발행과 지국운영에 관한 연구)

  • Kim, Moon-Jong
    • Korean journal of communication and information
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    • v.40
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    • pp.7-44
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    • 2007
  • This study aims to review the socialist news magazines between 1925 and 1936 under the Japanese regime, then to analyze how they published and how they managed the branch. The socialist magazines appeared legally and officially right after the 3 1 movement when the ownership and publishing of newspapers and news magazines was partially allowed. However, there were many obstacles because the permission by the Japanese regime was a result of deceptive cultural policy. The Japanese government more sensitively responded to the socialists' related news stories rather than other types of publications. Due to over-censorship and financial difficulty, the life time of most socialists' news magazines was very short. However, these news magazines did play an important role to disseminate socialism. In doing so, because the news magazines were a part of social movements, the delivery network was also maintained based on social movements.

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Dietary Aloe Improves Insulin Sensitivity via the Suppression of Obesity-induced Inflammation in Obese Mice

  • Shin, Eun-Ju;Shim, Kyu-Suk;Kong, Hyun-Seok;Lee, Sung-Won;Shin, Seul-Mee;Kwon, Jeung-Hak;Jo, Tae-Hyung;Park, Young-In;Lee, Chong-Kil;Kim, Kyung-Jae
    • IMMUNE NETWORK
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    • v.11 no.1
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    • pp.59-67
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    • 2011
  • Background: Insulin resistance is an integral feature of metabolic syndromes, including obesity, hyperglycemia, and hyperlipidemia. In this study, we evaluated whether the aloe component could reduce obesity-induced inflammation and the occurrence of metabolic disorders such as blood glucose and insulin resistance. Methods: Male C57BL/6 obese mice fed a high-fat diet for 54 days received a supplement of aloe formula (PAG, ALS, Aloe QDM, and Aloe QDM complex) or pioglitazone (PGZ) and were compared with unsupplemented controls (high-fat diet; HFD) or mice fed a regular diet (RD). RT-PCR and western blot analysis were used to quantify the expression of obesity-induced inflammation. Results: Aloe QDM lowered fasting blood glucose and plasma insulin compared with HFD. Obesity-induced inflammatory cytokine (IL-$1{\beta}$, -6, -12, TNF-${\alpha}$) and chemokine (CX3CL1, CCL5) mRNA and protein were decreased markedly, as was macrophage infiltration and hepatic triglycerides by Aloe QDM. At the same time, Aloe QDM decreased the mRNA and protein of $PPAR{\gamma}/LXR{\alpha}$ and $11{\beta}$-HSD1 both in the liver and WAT. Conclusion: Dietary aloe formula reduces obesity-induced glucose tolerance not only by suppressing inflammatory responses but also by inducing anti-inflammatory cytokines in the WAT and liver, both of which are important peripheral tissues affecting insulin resistance. The effect of Aloe QDM complex in the WAT and liver are related to its dual action on $PPAR{\gamma}$ and $11{\beta}$-HSD1 ression and its use as a nutritional intervention against T2D and obesity-related inflammation is suggested.

Experimental Performance Comparison for Prediction of Red Tide Phenomenon (적조현상의 실험적 예측성능 비교)

  • Heo, Won-Ji;Won, Jae-Kang;Jung, Yong-Gyu
    • Journal of the Institute of Electronics Engineers of Korea CI
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    • v.49 no.2
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    • pp.1-6
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    • 2012
  • In recent years global climate change of hurricanes and torrential rains are going to significantly, that increase damages to property and human life. The disasters have been several claimed in every field. In future, climate changes blowing are keen to strike released to the world like in several movies. Reducing the damage of long-term weather phenomena are emerging with predicting changes in weather. In this study, it is shown how to predict the red tide phenomenon with multiple linear regression analysis and artificial neural network techniques. The red tide phenomenon causing risk could be reduced by filtering sensor data which are transmitted and forecasted in real time. It could be ubiquitous driven custom marine information service system, and forecasting techniques to use throughout the meteorological disasters to minimize damage.