• 한국통신학회논문지
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• 제39B권8호
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• pp.491-498
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• 2014

현재의 인터넷은 경직성으로 인해 새로운 서비스 요구를 수용하기 어렵다. 이러한 문제를 해결하기 위한 방안중 하나가 네트워크 가상화다. 본 논문에서는 네트워크 가상화를 위한 휴리스틱 가상 네트워크 대응 방안을 제안한다. 제안하는 방안에서는 가상 네트워크를 실제 네트워크에 대응시킬 때, 실제 노드가 가상 링크 조건을 만족시킬 수 있는 가능성이 있는 지 확인하고 가상 노드와 실제 노드에 우선순위를 부여하여 우선순위에 따라 대응 순서를 정한다. 또한 대응되는 실제 노드가 클러스터를 형성할 수 있도록 한다. 제안하는 방안의 성능을 시간 복잡도와 가상 네트워크 수락율로 평가한다.

• Journal of Information Technology Applications and Management
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• 제17권2호
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• pp.187-205
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• 2010

This study takes a holistic approach to understand the diffusion of IPTV services by combining the adoption-diffusion model and the use-diffusion model of innovation. IPTV service, a leading digital converged application coupling media content with telecommunications, has been recently launched commercially in Korea. We created a structural model of adoption-diffusion, using the perceived easeof-use and usefulness of TAM(Technology Acceptance Model) as mediating variables, and a structural model of use-diffusion, with the rate of use and the variety of use as mediating variables. To empirically analyze these models, non-users of IPTV were surveyed using the adoption-diffusion model to identify factors influencing their intention to subscribe to the service. Meanwhile, users of IPTV were surveyed using the use-diffusion model to determine the factors that influence their satisfaction with the service and their intention to re-use it. Under the adoption-diffusion model, we found that trialability, household innovativeness and perceived risk were the determinants of user satisfaction with IPTV, and perceived ease-of-use, the mediating factors. Under the use-diffusion model, complementarity and communication were shown to be the determinants of users' satisfaction with IPTV, and variety of use, the mediating factor. We also found that consumers' intention to re-use IPTV was strongly influenced by its relative advantage and perceived risk.

• Environmental Engineering Research
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• 제10권3호
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• pp.144-154
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• 2005

The use of ozone gained acceptance in the production of ultrapure water because of its powerful oxidizing ability. Ozone is currently used to deactivate microorganisms and remove organic contaminants. However, interest also exists in using radical species, which arc stronger oxidants than ozone, in such processes. One means of producing radical species is by corona discharge. This work investigates the use of a novel pulseless corona-discharge system for the removal of organic substances in ultrapure water production. The method combines corona discharge with electrohydrodynamic spraying of oxygen, forming microbubbles. Experimental results show that pulseless corona discharge effectively removes organics, such as phenol and methylene blue, in deionized water. The corona-discharge method is demonstrated to be comparable to the direct use of ozone at a high-applied voltage. The results also show that a minimum applied voltage exists for operation of the corona-discharge method. In this work, the minimum applied voltage is approximately 4.5 kV. The kinetic rate or phenol degradation in the reactor is modeled. Modeling results show that the dominant species of the pulseless corona-discharge reactor are hydroxyl radical and aqueous electron. Several radical species produced in the pulseless corona-discharge process are identified experimentally. The. major species are hydroxyl radical, atomic hydrogen species, and ozone.

• 한국안전학회지
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• 제26권5호
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• pp.99-104
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• 2011

An ILRT Interval for a nuclear power plant in Korea was extended from once in five years to once in ten years. Therefore, it is necessary to evaluate risk impact for ILRT interval extensions. In this paper, input data were generated for the reference plants, KSNP, using raw data such as meteorological data, population distribution data and source term data. And, using MACCS II code the risk impact assessment was performed based on the two methodologies of NUREG-1493 and NEI Interim Report. The risk impact derived from an ILRT interval extension was identified not to be significant. It is considered to apply this study and results to making an accident management plan and safety goal, and to the field of public acceptance.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2007년도 하계학술대회 논문집 Vol.8
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• pp.248-248
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• 2007

Demands for electricity are growing, whereas the rate of electricity infrastructure's construction declines gradually. To keep the balance of the demand and supply, the share of underground transmission line will be increased from 8.3% to 10.5% in 2020 but it will be accompanied with enormous public expenses. A great concern in high capacity transmission is on the increase so as to maximize the spacial efficiency. High Temperature Superconducting (HTS) cable is in the lime light which has the merits of environment-friendly, low transmission loss and high transmission with low voltage, but the reliability verification as a power system is yet to be solved. KEPCO completed the installation and acceptance of $3{\phi}$, 22.9kV, 1250A class HTS cable system in 2006 and the long term test is in progress. The test results focusing on long term reliability are presented in this paper.

• 디지털산업정보학회논문지
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• 제14권4호
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• pp.135-148
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• 2018

The purpose of this study is to investigate the effect of perceived interactivity on intention to use augmented reality tourism application in mobile environment. The analysis results revealed that perceived interactivity has a positive (+) effect on perceived usefulness and ease, perceived ease has a significant effect on perceived usefulness, perceived usefulness and perceived ease are related to perceived ease of use (+) Effect on the growth rate. This study attempted to expand the theoretical aspects from an integrated point of view as the existing interactions studies have been studied with an intolerant perspective in the online or mobile environment. The results of this study can be summarized as follows: First, the constructivist factors of perceived interactivity are derived through a comprehensive study of previous studies, and the second-order and reflective constructs are measured to confirm that the perceived interactivity consists of five sub-dimensions. Through such verification, the structure of perceived interactivity was systemized by clarifying the relationship between the factors. In addition, the four components of the perceived interactivity derived from the present study have differentiated effects on the TAM, respectively.

• Horticulture, Environment, and Biotechnology : HEB
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• 제59권6호
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• pp.787-804
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• 2018

Flavor quality is import for determining consumer perception and acceptance of tomato products. In this study, 'Fendou' tomato fruit were harvested at six ripening stages and sampled to investigate the development of flavor-relevant compounds during vine ripening. Results showed that upon the initiation of ripening there was an increase in respiration rate and concomitant ethylene evolution that was associated with increased membrane permeability. In accordance with these physiological changes, flavor-relevant compounds demonstrated different expression patterns as fruit ripened, which contributed to 'red-ripe' flavor characteristics of red-ripe fruit. Based on correlation analysis between ethylene evolution and the flavor-relevant compounds during 'Fendou' tomato ripening and the other researchers' reports, the activation of System 2-dependent autocatalytic ethylene production plays an important role in the development of most flavor-relevant compounds during tomato vine ripening. Overall, our results suggested that most flavor-relevant compounds that accumulated the most during tomato fruit ripening at red stage could be under ethylene regulation and were among the most important contributors to the 'red-ripe' flavor. Due to the development of these compounds, the flavor quality at late ripening stages is different from that of fruit at early ripening stages.

• Journal of Forest and Environmental Science
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• 제36권4호
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• pp.311-317
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• 2020

Mushroom has economic, food and medicinal value to a large proportion of human populace. This study assessed the consumption pattern of mushroom species in Southwestern Nigeria. Non-probability sampling method was used to select 20 Local Government Areas (LGAs) from 3 states and four communities were selected purposively from each LGAs. Snow-ball sampling approach was used in selecting 5 respondents from each community, making a total of 400 respondents. Descriptive statistics was used to describe the socio-economic characteristics of the respondents, to compare the differences between the local (wild) and Exotic (cultivated) mushroom Species and to determine the rate at which mushroom substitute is consumed among the mushroom consumers. Logit regression was used to identify the factors influencing mushroom consumption in the study area. Thirty percent of the respondents were aged 41 to 50 years, with mean age of 49.76 years. About 82% had tertiary education, 17.3% earned above N200,000 monthly and 8.8% spent above N6000 monthly on mushroom. Logit regression showed that age (-3.21), household size (-2.17) and medicinal benefits (-2.17) had significant (p<0.01) negative effects on mushroom consumption. Conclusively, mushroom has wide acceptance among the general populace, good for food and medicine; hence, awareness should be created through agricultural policy on the need for mushroom cultivation and consumption in Nigeria.

• 비교문화연구
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• 제25권
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• pp.185-212
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• 2011

The faith in St. Mary of Guadalupe is supposed to be concerned not as reminiscence of historical events or legends, but organic product of having nowness. It's an organism that can not be stay in a fixed type. From the perspectives of syncretism the coexistence of heterogeneous elements (Symbiosis) between Catholicism and Aztec's religion has been changed constantly depending on the necessity and function of the subjects who have dreamed the social integration. It's fundamentally clear that the faith in St. Mary of Guadalupe is still valid phenomenon in the modern Mexican society and that the faith is an aspect of popular catholicism which includes the remaining elements of the religion of the Aztecs. This is to understand the meanings of the perception of the contemporary mexicans on the phenomenon for the faith in St. Mary of Guadalupe. Through in-depth interviews, it is revealed that a high rate of sharing of the information does not mean the proportional acceptance of the history. It's a interesting point to see that the mexicans consider the faith in St. Mary of Guadalupe catholic belief, having a feeling of strong tie between themselves and the Aztec's religion. In spite of the historical conflicts over the veracity of St. Mary of Gaudalupe, the majority of the contemporary mexicans consider the faith positive element to consolidate the nationality and socio-cultural identity of $M{\acute{e}}xico$ against the socio-political and ethnic conflicts in the Mexican Society.

• 한국보건간호학회지
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• 제35권3호
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• pp.469-480
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• 2021

Purpose: Nurses are exposed to stressful circumstances during the COVID-19 outbreak, which increases their turnover intention. This study aimed to identify predictive factors of turnover intention among nurses during the COVID-19 outbreak. Methods: This study was a cross-sectional design using self-report questionnaires. A total of 164 nurses working at three hospitals participated voluntarily in the study. Questionnaires included nursing professionalism, job satisfaction, control belief and COVID-19 stress. Data were collected from February 1, 2021, to March 15, 2021. Data were analyzed with SPSS WIN 23.0 program using descriptive statistics, x2-test, independent t-test and logistic regression. Results: The turnover intention rate of nurses was 33.5%. Two significant predictors of nurses' turnover intention were identified, including risk acceptance in caring for patients with COVID-19 (odds ratio [OR] 4.24, 95% confidence interval [CI]=1.76~10.49) and nursing professionalism (OR=1.06, 95% CI=1.02~1.10). Conclusion: Hospital administrations should provide an improved work environment, such as individual protective equipment, compensation and protective system to nurses to avoid turnover intention in COVID-19 outbreak.