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Development on the Selection of Green Construction Materials for Residental Safety (거주자 안전을 고려한 친환경 건축재료 선정 시스템개발)

  • Song, Hyuk;Chung, Woo-Yang
    • Journal of the Korean Society of Safety
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    • v.20 no.4 s.72
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    • pp.63-70
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    • 2005
  • It has been used so many kinds of architectural materials and interior products in current building construction, and use of composite architectural materials is increasing with the development of chemical technology. As the green architecture has become the center of public interest, much effort is conducted in advanced countries on the LCA point of view, such as restriction of architectural materials that emitting pollution substances, developing of Non-Toxic architectural materials, and recycling of used materials, etc. with the cooperation of related organizations, material manufacture companies, and construction companies. Because the kinds of materials to be used in building constructions are so various, there might be some possibility of personal and subjective choice at the time of materials selection resulting the missing the requirements of building components and the choice of harmful materials to human. One way to resolve the material problem is to present the green architectural materials which coincide with the quality performance at service and not harmful to man and nature. At this point of view, this study aims to develop the material classification model by investigating the major labelling system about green architectural materials in both domestic and abroad and to implement an efficient material selection system by making a powerful database of environmental standard and quality basis of building requirements.

Variation of Solar Photovoltaic Power Estimation due to Solar Irradiance Decomposition Models (일사량 직산분리 모델에 따른 표준기상연도 데이터와 태양광 발전 예측량의 불확실성)

  • Jo, Eul-Hyo;Lee, Hyun-Jin
    • Journal of the Korean Solar Energy Society
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    • v.39 no.3
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    • pp.81-89
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    • 2019
  • Long-term solar irradiance data are required for reliable performance evaluation and feasibility analysis of solar photovoltaic systems. However, measurement data of the global horizontal irradiance (GHI) are only available for major cities in Korea. Neither the direct normal irradiance (DNI) nor the diffuse horizontal irradiance (DHI) are available, which are also needed to calculate the irradiance on the tilted surface of PV array. It is a simple approach to take advantage of the decomposition model that extracts DNI and DHI from GHI. In this study, we investigate variations of solar PV power estimation due to the choice of decomposition model. The GHI data from Korea Meteorological Administration (KMA) were used and different sets of typical meteorological year (TMY) data using some well-known decomposition models were generated. Then, power outputs with the different TMY data were calculated, and a variation of 3.7% was estimated due to the choice of decomposition model.

Exploring the Impact of Live Commercial Anchors on Business Performance and Survival Strategy: Focusing on Resource Configuration and Environmental Choice

  • ZHANG, Li-Jie;HUANG, Fei
    • East Asian Journal of Business Economics (EAJBE)
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    • v.10 no.4
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    • pp.1-18
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    • 2022
  • Purpose - Through the analysis and research of different characteristics and related mechanisms of live commerce anchors, this paper aimed to help live commerce anchors to strengthen their characteristic advantages, beautify the live broadcast environment, improve resource allocation and enhance business performance, so as to help live commerce anchors to achieve better high-quality development. Research design, data, and methodology - This study was conducted by sample survey method on 361 live commercial anchors who have experience in using major online shopping malls for more than one year. Data analysis methods were frequency analysis, confirmatory factor analysis, reliability analysis, correlation analysis, and structural equation model analysis. Result - Hypothesis 1 through Hypothesis 5 were all supported. The results of this study suggest that professionalism and mutual entertainment of live commercial anchors have a significant impact on business performance, survival strategy, resource allocation and environment selection. The resource allocation and environment selection of live commercial anchors play a mediating role in the professionalism and mutual entertainment of live commercial anchors on business performance and survival strategy. Conclusion -The results implied that the professionalism and inter entertainment of live commercial anchors have a positive impact on business performance and survival strategy. In the new situation, live commercial anchors should further improve their professionalism and mutual entertainment, so as to achieve better development.

The Economic Value for the Post-use of the 2018 Pyeongchang Winter Olympics Facilities: Case of Alpine Stadium in Jeongseon (2018평창동계올림픽 시설 사후활용에 대한 경제적 가치: 정선군 알파인 경기장을 사례로)

  • Song, Woon-Gang;Lee, Hae-Jin;Yang, Hee-Won
    • Asia-Pacific Journal of Business
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    • v.11 no.2
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    • pp.235-244
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    • 2020
  • Purpose - This study estimated the value of the post-use of Alpine stadium in Jeongseon as a tourist attraction, which is one of the 2018 Pyeongchang Winter Olympics facilities, and identified determinant factors on the willingness to pay (WTP). Design/methodology/approach - A dichotomous-choice model of contingent valuation method (CVM) that is known for an effective tool was used to calculate the value. The questionnaire was conducted on 650 visitors to major tourist destinations in Jeongseon and 629 copies of the valid samples were analyzed. Findings - The results shows that determinate factors on the WTP are; suggestion cost, need (application of Ecotourism Program to the Restoration Process), agree(agree to Ecotourism Program in the Restoration Process) and age. Also, the WTP on the facility is 16,296 won per person. Research implications or Originality - This study estimates the value of the post-utilization of Alpine Stadium of the 2018 Pyeongchang Winter Olympics facilities, which have been experiencing conflict in recent years. For this reason, the findings of the paper will provide meaningful information for tourism development and management policies of the region.

The Study on Satisfactory Rate with Students Which Experienced Non-face-to-face Online Class Environment for Two Years: For Radiology Majoring Students (실시간 비대면 수업환경을 2년간 경험한 학생들의 만족도 조사 연구: 방사선전공학생들을 대상으로)

  • Son, Jin-Hyun
    • Journal of radiological science and technology
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    • v.44 no.6
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    • pp.679-688
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    • 2021
  • This study is a questionnaire about the lesson environment that radiation major students prefer in a non-face-to-face live online lesson environment for a total of 133 students, 65 second graders and 68 third graders who are enrolled in the department of radiology at a university located in the Seoul metropolitan area. And checked the satisfactory level by grade. The questionnaire consists of three categories: 1st real-time non-face-to-face lectures, 2nd professor lectures, and 3rd corona lectures. A total of 14 questions, with multiple choice and descriptive response methods. As an evaluation method, in the case of a multiple-choice question, the average was calculated using a 5-point Likert scale. As a result of conducting the independent sample T-test of the SPSS program, the response by grade was P > 0.05, and no significant result was shown by the contents of the questionnaire survey of the second grade. As for the lecture method of the department of radiology after the end of Covid-19 virus, it is better to promote face-to-face lessons in radiation training subjects and non-face-to-face real-time education in subjects centered on radiation theory.

A study of interest in pet food by consumer food choice type

  • Seungjee, Hong;Jaehong, Park
    • Korean Journal of Agricultural Science
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    • v.49 no.3
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    • pp.607-617
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    • 2022
  • As the number of households raising pets increases, the pet food industry is also growing. Since pets cannot express their intention explicitly, it appears that the owner's perception mainly affects the selection of products related to pets. In this study, consumers were categorized based on their interest in food choices and the factors influencing their interest in pet food were empirically analyzed. For the analysis, a cluster analysis, factor analysis, and Tobit analysis were conducted using consumer survey data for raising companion animals. The major findings of the study were as follows. As a result of the factor analysis and cluster analysis using questions for consumers' food consumption choices, consumer types were classified into high-interest, low-interest, and practical-seeking types. The degree of interest in pet food was high in the order of high-interest, practical-seeking, and low-interest type. Demographic characteristics such as gender, education, and household type correlate with differences in the degree of interest in pet food, and the food selection criteria of consumers also affect the degree of interest in pet food. These results show that consumers who are more interested in their food choices are more interested in pet food, and this will make possible to know pet owner's purchasing behavior for pet food.

A Direct Utility Model with Dynamic Constraint

  • Kim, Byungyeon;Satomura, Takuya;Kim, Jaehwan
    • Asia Marketing Journal
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    • v.18 no.4
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    • pp.125-138
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    • 2017
  • The goal of the study is to understand how consumers' constraint as opposed to utility structure gives rise to final decision when consumers purchase more than one variant of product at a time, i.e., horizontal variety seeking or multiple-discreteness. Purchase and consumption decision not only produces utility but also involves some sort of cognitive pressure. Past consumption or last purchase is likely to be linked to this burden we face such as concern for obesity, risk of harm, and guilt for mischief. In this research, the existence and the role of dynamic constraint are investigated through a microeconomic utility model with multiple dynamic constraint. The model is applied to the salty snacks data collected from field study where burden for spiciness serves as a constraint. The results are compared to the conventional multiple discreteness choice models of static constraints, and policy implications on price discounts is explored. The major findings are that first, one would underestimate the level of consumer preference for product offerings when ignoring the carry-over of the concern from the past consumption, and second, the impact of price promotion on demand would be properly evaluated when the model allows for the role of constraint as both multiple and dynamic. The current study is different from the existing studies in two ways. First, it captures the effect of 'mental constraint' on demand in formal economic model. Second, unlike the state dependence well documented in the literature, the study proposes the notion of state dependence in different way, via constraint rather than utility.

A Consumer Behavioral Study of Dietary Supplement Choice Attributes in the Post-COVID-19 Era: Focusing on Generation MZ

  • Bo-Kyung SEO;Gyu-Ri KIM;Seong-Soo Cha
    • The Korean Journal of Food & Health Convergence
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    • v.10 no.3
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    • pp.1-8
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    • 2024
  • The global nutraceuticals market continues to grow due to rising income levels, increasing life expectancy, and a growing interest in personal health. Especially after the COVID-19 pandemic, the market for nutraceuticals has expanded rapidly with positive perceptions driven by increased attention to immune management for disease prevention. However, there is still a lack of research on the relationship between nutraceuticals and consumer behavior. This study aims to provide new insights into the dietary supplement market and help establish marketing strategies by analyzing consumer behavior toward dietary supplements in the post-COVID-19 era, focusing on Generation MZ. An online survey was conducted among consumers who have purchased dietary supplement products to test the hypotheses. The collected data were analyzed for validity and reliability using SPSS and AMOS programs. The results showed that the taste, price, brand, and design of dietary supplements significantly positively affect the satisfaction of MZ consumers. This study provides an in-depth understanding of the mechanisms of consumer behavior toward dietary supplements in the post-COVID-19 era, focusing on Generation MZ. By offering insights into consumers' health concerns and consumption behaviors, this study provides valuable perspectives on the future development of the market and helps companies develop effective strategies to meet consumer needs.

A Study on the Intercity Mode Choice Behavior of Daegu Citizens According to the Introduction of Gyeongbu High-Speed Railway (경부 고속철도 개통에 따른 대구시민의 지역 간 통행수단 선택행태 분석에 관한 연구)

  • Yun, Dae-Sik;Yuk, Tae-Suk;Kim, Sang-Hwang
    • Journal of Korean Society of Transportation
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    • v.24 no.1 s.87
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    • pp.29-38
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    • 2006
  • After the first opening of the KTX in April 2004, travel time between major cities has been dramatically reduced. The reduction rates range from 32% to 47%. Considering travel time reduction between major cities, this study concerned about the intercity travel impact of the KTX operation. This study aimed to analyze intercity mode choice behavior of Daegu Citizens according to the first opening of the KTX. This study takes place in two sections. These are (i) the section of KTX between Daegu and Seoul, and (ii) the section of KTX between Daegu and Daejeon. This study estimated empirical models for analyzing intercity mode choice behavior according to the first opening of the KTX. This study makes use of the data from travel survey from Daegu metropolitan area. The main part of the survey was carried out in the KTX Dong-Daegu station. The survey data includes the information on travel from Daegu to Daejeon and from Daegu to Seoul. In order to analyze intercity choice behavior according to the frist opening of the KTX, multinomial model structure is used. For the model specification, a variety of behavioral assumptions about the factors which affect the mode choice, were considered. From the empirical model estimation, it is found that OVTT(Out-of-Vehicle Travel Time), OVTC(Out-of-Vehicle Travel Cost), IVTT(In-Vehicle Travel Time), IVTC(In-Vehicle Travel Cost), travel frequency, travel purpose, sex, age, occupation. household income, individual income are significant in choosing intercity travel mode. However, it is found that the intercity nde choice behavior is different between (i) the section of KTX between Daegu and Seoul, and (ii) the section of KTX between Daegu and Daejeon. Furthermore, some policy implications are discussed in conclusion.

Anxiety and fatigue related to dental practices of dental hygiene students (치위생과 학생들의 임상실습관련 불안과 피로 조사)

  • Lee, Hyang-Nim;Kim, Eun-Mi
    • Journal of Korean society of Dental Hygiene
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    • v.14 no.2
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    • pp.131-137
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    • 2014
  • Objectives : The aim of the study is to investigate anxiety, fatigue and stress of dental hygiene students in clinical practice and to improve the psychological support program. Methods : A self-reported questionnaire was filled out by 428 dental hygiene students in 4 universities in Gwagju and Jeonnam. Data were analyzed for anxiety, stress and fatigue, general characteristics using SPSS 18.0 program for descriptive statistics, ANOVA, and correlation. Results : Saliva suction showed the most high score in treatment($mean{\pm}SD=2.92{\pm}1.13$) and was followed by children dental care($2.79{\pm}1.21$), preventive dental care($2.38{\pm}1.04$), maxillofacial radiology($2.35{\pm}1.15$). During the clinical practice, students felt uneasy when they stayed in relative home(p<0.05). Poor interpersonal relation(p<0.001), poor health condition(p<0.01), low satisfaction with major(p<0.01), the other cause of major choice(p<0.01) influenced on their stress. Satisfaction with major was closely related to clinical practice performance, anxiety, physical fatigue and mental fatigue. Conclusions : In order to reduce physical, mental, neuro sensory fatigue of students in clinical practice, it is recommended to reinforce the patient care etiquettes in curricula.