• 대한토목학회논문집
• /
• 제12권3호
• /
• pp.81-90
• /
• 1992

고성능감수제를 사용한 콘크리트의 유동성 손실을 저감시키기 위한 연구의 일환으로 시멘트의 종류, 고성능감수제의 종류, 사용방법 및 사용량이 굳지않은 콘크리트의 유동성 손실에 미치는 영향을 파악하기 위하여 시멘트풀, 모르터 및 콘크리트의 유동성 손실과 관련된 실험을 통하여 얻어진 결과에 대하여 고찰하였다. 본 연구결과 고성능감수제의 첨가시기는 시멘트 및 고성능감수제의 종류에 따라 다소 차이가 있으나 30분후 첨가방법이 유동성 손실을 줄이는데 유효하였으며, 대체로 고성능감수제 사용량이 많을수록 유동성 손실이 크게 나타났으며 보통포틀랜드시멘트 콘크리트가 유동성 손실이 가장 크고 플라이애쉬 20% 혼합시멘트 콘크리트에 나프탈린계 고성능감수제를 30분후 첨가한 경우 유동성 손실이 매우 작은 효과가 있었다.

• 한국콘텐츠학회논문지
• /
• 제19권11호
• /
• pp.558-566
• /
• 2019

AI 스피커의 판매량이 빠른 속도로 증가하는 가운데, AI 기술은 우리 일상에 더욱 깊숙이 스며들어 보편화되고 있다. 본 연구에서는 AI 스피커 이용의 이면에 존재하는 이용동기가 무엇인지를 탐색하고, 이러한 동기를 비롯하여, AI 스피커에 대한 관계 유형에 대한 인식이 AI 스피커 이용에 따른 즐거움에 어떠한 영향을 미치는지를 알아보고자 하였다. 연구 결과, 대화동기, 유행선도동기, 효율성동기, 오락동기의 네 가지 동기가 존재하는 것으로 나타났고, 네 가지 동기 중에서 유행선도동기, 효율성동기, 오락동기의 세 가지 유형이 모두 즐거움에 영향을 미치는 것으로 나타났다. 한편, AI 스피커에 대한 관계 유형중에서는 비서·보조자 유형에 대한 인식만이 즐거움에 영향을 미치는 것으로 확인되었다. 본 연구 결과들은 향후 AI 스피커의 인터랙션 디자인이 추구해야 할 방향에 관한 실무적 시사점을 제공한다.

• 대한교통학회지
• /
• 제25권1호
• /
• pp.133-141
• /
• 2007

승용차 부문의 에너지수요 또는 대기오염물 배출에 대해 영향을 미치는 정책의 효과를 정확히 예측하기 위해서는 소비자의 승용차 보유 및 이용행태에 대한 분석 및 예측이 선행되어야 한다. 이를 위해 본 연구는 네스티드로짓모형 을 활용한 가계의 자동차 보유대수 및 차종선택에 대한 연구로서 2003년 에너지경제연구원에서 수행한 에너지간이 조사 자료를 이용하여 추정을 시도하였다. 모형의 추정결과를 요약하면 모형의 적합도(goodness of fit)를 나타내는 ${\rho}^2$ 값과 포괄값이 모두 통계적으로 유의한 범위 내에 있어 네스티드로짓모형을 활용한 방법이 더 우수하다고 할 수 있다. 또한 운행비용의 탄력성이 1보다 커서 가구의 차량보유대수 및 차종선택은 운행비용에 대해 매우 민감하다는 것과 소득계층별로는 저소득 계층이 고소득 계층보다 더 민감하게 반응한다는 것을 알 수 있었다.

• 한국주거학회:학술대회논문집
• /
• 한국주거학회 2005년도 추계학술대회 논문집
• /
• pp.177-180
• /
• 2005

In accordance with recent highly advanced economic growth, the demand of leisure life is quite increasing, and also the increase of nature-friendly leisure with health-pursuing concept where human -being enjoys pleasant environment, is to me said as one of recent social traits. Accordingly, it is research the present situation and characteristic of the popularized housing-type accommodating facility, and then this study has discussed on the method how to plan the interior space of such facility to meet with environmental -friendly peculiarity and the object for health enhancement. At first, the program which applied the sustainable design techniques should be preceded, and when planning of interior space, the management method and space planning on the facility and the system should be properly considered in order to enhance the user's health. So to speak, in order to keep and promote the space user's health, those proposing methods such as the followings have been suggested likely as, consideration regarding to air-ventilation and lighting, usage of environmental-friendly material, use of life drainage, custom-typed plane planning, utilization of balcony space, storing furniture and systemization of kitchen space, themed bathroom, inducement of indoor-gardening, and so on. It is expected that this could be applied very usefully to the space plan of the small-scaled housing-type accommodation under planning to develop or renovation.

• 비교문화연구
• /
• 제30권
• /
• pp.187-222
• /
• 2013

In this study, From 1,560 entry-level of TOPIK standard vocabularies are 702 Sino-Korean words selected which account for 45% of the whole vocabularies in TOPIK. In addition, the same form and morpheme words in Sino-Korean are sorted out by comparing them with 5,000 words of the NEW HSK vocabularies in Sino-Korean morpheme, array position of morpheme, meaning, and usage. Those are categorized into three parts : type of completely the same form-morpheme and same meaning, use, class(189 pairs), type of completely the same form-morpheme and partly same meaning, use, class(28 pairs), and type of completely the same form-morpheme and different meaning, use, class(10 pairs). The first type of words that account for 83.26% of them are used in exactly the same way in both Chinese and Korean. Through an accurate understanding of these vocabularies could either Chinese-speaking Korean learners or Korean-speaking Chinese learners apply those words in their mother tongue to the acquisition of the target language and get more effective means of learning methods for language proficiency test.

• 한국보건간호학회지
• /
• 제33권1호
• /
• pp.59-72
• /
• 2019

Purpose: Nursing homes are a type of residential care that provide diverse services such as planned activities, convalescent care, skilled nursing and memory care. Nursing homes are good facilities for old people with dementia to improve their quality of life. On the other hand, the subjectivity toward nursing homes can vary to greater or lesser degrees. The purpose of this study was to identify the subjective attitudes and viewpoints toward nursing homes in undergraduate nursing students. Methods: The Q methodology, which is a research method to study the people's subjectivity, was used. The 40 Q-statements selected from each of 43 participants were classified into the shape of a normal distribution. The data collected were analyzed using the QUANL program. Results: Three types of subjectivity toward nursing homes emerged: 'Type I, in terms of usage of nursing homes-hesitative perspectives;', 'Type II, in terms of running of nursing homes-progressive perspectives;', and 'Type III, in terms of admission to nursing homes-constructive perspectives'. Conclusion: The findings of this study suggest that nursing intervention programs should be developed for the three types. The study results will lead to further research.

• International Journal of Contents
• /
• 제17권2호
• /
• pp.48-64
• /
• 2021

This study examines mobile news engagement-conceptualized as news exposure and participation-in the context of South Asia which has experienced tremendous growth in mobile-Internet users without receiving much attention from communication scholars. Along with demographic characteristics, this research incorporates motivational factors (grounded on uses and gratifications-U&G-approach) and news type preferences to explore their roles in mobile news engagement among urban citizens in Bangladesh. Results of a self-administered survey (N = 504) revealed that participants' mobile news engagement partially varied depending on their demographic differences, particularly gender, age, and education. Our study also unveiled that individuals' motivation for sharing information seemed to be a strong predictor of mobile news exposure and participation. In addition, Bangladeshi respondents were more likely to be interested in the hard news in terms of expressing views on news comments and sharing news via mobile platform. Conversely, preference for soft type news had a significant influence on news exposure through mobile browsing. This study provides insights into the understanding of global phenomena of mobile news engagement by unpacking the case of Bangladesh where mobile news usage seems to be an evolving state.

• 국토계획
• /
• 제54권5호
• /
• pp.76-90
• /
• 2019

The purpose of this study is to analyze the survival characteristics of the restaurant business by trade area type (major and side street). By the increase of the unemployment rate, the new foundation of selt-employment type is increasing. However, due to high competition and economic recession, the sustainability of new foundation is not high. Therefore, in this study, survival analysis was performed considering the individual and commercial characteristics focused on the ordinary restaurants. The major findings are as follow. First, the characteristics of parcel unit and adjacent area have a significant effect on the survival. This means the micro-scopic spatial characteristics should be considered for survival in the location choice. Second, the regional economic characteristics in trade area have a significant effect on survival. Furthermore, these characteristics are different by the trade area type. Third. the development characteristics have a different effect on survival by the building usage and trade area type. Finally, regional economic characteristics have a significant effect on survival. These results are expected to be used as basic data for commercial location selection and trade area analysis system in the private and public sectors.

• 디지털산업정보학회논문지
• /
• 제20권2호
• /
• pp.75-89
• /
• 2024

The demand for metaverse is increasing rapidly due to the development of 3D information technology and the pandemic situation caused by COVID-19. Small and medium-sized enterprises(SMEs) are also in increasing demand for metaverse in the community, meetings, and customer services of their employees. Based on the UTAUT model, this study investigated the acceptance of the Metaverse-type information system(IS) by employees of SMEs. Using the responses from 170 SMEs employees, we conducted the regression analyses SMEs employees' usage intention on Metaverse-type IS. The results of the research analyses were as follows. First, among the variables of the UTAUT model, performance expectations, social influence, and promotion conditions had a significant effect on the intention to use. Second, among the variables derived from the industrial specificity of Metaverse-type IS, only individual innovation had a significant influence on the intention to use. Last but not least, in the relationship between the intention to use Metaverse-type IS and the influencing factors, only individual innovation was significant in the moderating effect according to past metaverse use experience.

• 조명전기설비학회논문지
• /
• 제30권2호
• /
• pp.71-77
• /
• 2016

The dielectric barrier discharge (DBD) has low efficiency due to about 70% input power is consumed as thermal energy in the discharge space. However, because of the usage of DBD ozone generator is easier than other methods. The DBD ozone generator has been widely applied for high concentration ozone generation in the industrial application. But, the low-capacity compact DBD ozone generator is not applied so far. Therefore, the DBD ozone generator is necessary to improve ozone production efficiency and reduce the capacity. In this paper, the stainless steel pipe inner electrode was designed with hall type and screw type to improve the ozone production yield. The manufactured two inner electrodes were experimented with normal type for comparison of the discharge characteristics and the ozone generating characteristics. As the experimental results, the discharge current effective value of designed inner electrodes with hall type and screw type are higher than the normal type, due to unequal electric field is formed at the boundary. However, the difference of designed and original electrodes is less than 0.1mA that has no effect on the discharge characteristic. On the other hand, the screw type inner electrode increased higher than original model about 7 times when the flow rate of the oxygen source gas was increased from $0.6{\ell}/min$ to $1.0{\ell}/min$ The reason was assumed by the flow rate of the raw gas through the inner electrode was became fast that has a cooling effect. The designed hall type and screw type inner electrodes have shown good performances in ozone generation and ozone production that better than normal type in the same electrode surface area.