• Journal of Korea Water Resources Association
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• v.41 no.1
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• pp.101-113
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• 2008

Cost-benefit analysis was conducted to propose the best alternatives for integrated watershed management. Benefits of all alternatives were estimated combining results of choice experiment method with alternative evaluation index (AEI). Choice experiment which is a kind of stated preference techniques was applied to six regions since the Anyangcheon watershed was divided into six according to spatial characteristics and conditions (potential hazard and location). Alternative of NB > 0 must be considerable since they are economically and technically feasible.

• The Journal of Fisheries Business Administration
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• v.43 no.3
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• pp.31-41
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• 2012

This paper was conducted to study the economic valuation for Nursery-Phase production of the tidal flat oyster in Korea. Benefit-cost(B/C) model used to indicate the effects of economic valuation. Using discounting rates(i.e., 4.5%, 6.5% and 8.5%), the model compared revenues and costs that occur at different times from 2012 to 2018. This study also estimated various submodels, which are Benefit Cost Ratio(B/C ratio), Net Present Value(NPV), Internal Ration of Return(IRR), to compare profit of Nursery-Phase production styles and analyzed returns to evaluate the scenarios. Sensitivity analysis were conducted for various scenarios. The results suggest as follows. First, the oyster spat to the shell height of 3~5cm was more profit than the shell height of 1~3cm. Second, all of sensitivity analysis with submodels were economic valuation such that B/C ratio > 1, NPV > 0 and IRR > discounting rate. Third, the payback period was about 3years after installed Nursery-Phase production system.

• KIEAE Journal
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• v.6 no.1
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• pp.3-10
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• 2006

As has been expected, economic factors are a major consideration in almost every decision in building design process. Assuming that improving a lighting system, existing or proposed, will reduce operating cost, what preliminary economic guidelines can be established to determine whether any proposed investment appears cost effective? In such a case a reasonable technique to compare system costs is by life-cycle costing. Stated simply, a life-cycle cost represents the total cost of a system over its entire life cycle, that is, the sum of first cost and all future costs. This paper aims to exemplify the benefit of daylighting in term of economic consideration. Four different electric lighting system designs are proposed and a lighting control system that is continuously operating according to the level of daylight in the space has been adapted. The accumulated performance of electric and daylighting is figured out to declare the effective depth of daylight in the space. The analysis on the saving amount of lighting energy due to daylight has been undertaken in answer to the question, that is, several projects are being considered, which is the most desirable from the cost-effectiveness viewpoint. The result shows clearly that although denser layout of lighting fixtures might be more effective to interface to the level of daylight ceaselessly changeable, its economic benefit may not meet the expected criterion the reason of increased initial investment and maintenance cost for the fixtures and control hardware.

• Journal of the Korean Society of Clothing and Textiles
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• v.30 no.2 s.150
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• pp.245-254
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• 2006

The purposes of this study were to identify the perceived difference of salesman's service and relationship benefit according to types of customers, to explain the effects of salesman's service and relationship benefit on buying satisfaction and repurchase intention, and to reveal the influences of satisfaction with purchase on repurchase. The data were collected from 318 female adults in Gwangju using a questionnaire to salesmen's service, relationship benefits, buying satisfaction, repurchase intention, and were analysed with factor analysis, t-test and regressive analysis with SPSS 10.0. The results of this study were as follows: 1. The regular customers perceived a significantly higher salesmen's services and relationship benefits than irregular customers. 2. In regular customers, 'knowledge of products', 'etiquette' and 'confident benefits' had a significant influence on buying satisfaction. 'Confident benefits' had a significant influence on repurchase intention. Tn irregular customers, 'etiquette', 'easiness' and 'confident benefits' had a significant influence on satisfaction with purchase. 'Knowledge of products', 'easiness' and 'confident benefits' had a significant influence on repurchase intention. 3. Satisfaction with purchase had a significant influence on repurchase intention in both regular/irregular customers.

• The Journal of Korean Academic Society of Nursing Education
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• v.24 no.3
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• pp.205-213
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• 2018

Purpose: This study was performed to identify factors associated with human papillomavirus vaccination intention among unvaccinated nursing students. Methods: Two hundred-and-five female nursing students from three universities completed self-administered questionnaires including participants' characteristics, human papillomavirus-related knowledge, attitude toward human papillomavirus vaccination, and human papillomavirus-related health beliefs. Multivariate logistic regression analysis was used to determine significant independent predictors of human papillomavirus vaccination intention. Results: Of 205 participants, 134 (65.4%) reported an intention to obtain a vaccination against human papillomavirus. As a result of the analysis of the bivariate relationships, family history of cervix cancer, perceived needs, importance of prevention, perceived susceptibility, perceived benefit, and perceived barrier were significantly related to vaccination intention. A multivariate logistic regression model identified factors of human papillomavirus vaccination intention: higher importance of prevention (Adjusted Odds Ratio [AOR]: 4.20, 95% Confidence Interval [CI]: 1.73~10.19), higher perceived benefit (AOR: 6.94, 95% CI: 2.01~23.98), lower perceived barrier (AOR: 0.39, 95% CI: 0.20~0.73). Conclusion: The results of this study indicated significant factors influencing the intention to obtain human papillomavirus vaccination in unvaccinated nursing students. Also, the importance of prevention, perceived susceptibility, perceived benefit, and perceived barrier in obtaining human papillomavirus vaccination should be taken into account when developing educational programs.

• Ocean and Polar Research
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• v.36 no.2
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• pp.157-163
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• 2014

This study analysed the economic feasibility per hectare of grow out phase production of Oyster farming by rising water temperature in Ocean. Elevated Water temperature by climate change had a bad influence for oyster production and economic feasibility. In the case of production units, the total output of oyster decreases from 213,840 to 205,594 units. Using cost-benefit analysis with discounting rates (5.5%), we estimated the net present value (NPV) and benefit cost ratio (BCR) until 2100 years. The model results showed that the NPV without water temperature rise was 1,565,619,893 won and the NPV with water temperature rise was 1,540,493,059 won. Also, BCR estimated that the former was 2.095 better than the latter was 2.077. To summarise, the economic effect per hectare of water temperature rise in ocean did the damage to the economic loss about 25,126,834 won.

• Korean Journal of Air-Conditioning and Refrigeration Engineering
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• v.19 no.7
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• pp.491-499
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• 2007

An architectural means of optimal daylight distribution is by using so-called light shelf systems, horizontal shading and redirecting devices. The overall performance of the daylighting system can be improved by the incorporation with electric lighting control devices. This paper aims to exemplify the benefit of daylighting in term of economic consideration. In such a case a reasonable technique to compare system costs is by life-cycle costing. Stated simply, a life-cycle cost represents the total cost of a system over its entire life cycle, that is, the sum of first cost and all future costs. Four different electric lighting system designs are proposed and a lighting control system that is continuously operating according to the level of daylight in the space has been adapted. The result shows clearly that although denser layout of lighting fixtures might be more effective to interface to the level of daylight ceaselessly changeable, its economic benefit may not meet the expected criterion the reason of increased initial investment and maintenance cost for the fixtures and control devices.

• Human Ecology Research
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• v.55 no.4
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• pp.351-362
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• 2017

Collaborative consumption (CC) occurs in organized systems or networks in which participants conduct sharing activities in the form of renting, lending, trading, bartering, and swapping of goods, services, transportation solutions, space, or money. Information and communications technologies (ICTs) that have emerged with CC. CC is expected to alleviate social problems such as hyper-consumption, pollution, and poverty by lowering the cost of economic coordination. In this study, we investigate the influence of educational experience and expected benefits of CC participation (intended to using and providing CC) of Adolescent Consumers. The subjects for the study were 418 high school students. Data was analyzed through frequency analysis, mean, standard deviation, t-test, ANOVA, Pearson's correlation, and hierarchical multiple regression analysis using SPSS Win 21.0. The results of this study are as follows. First, the significant positive relationship found between CC participants (intent to use and provide CC), educational experience (home education, school education, and mass media) and expected benefits (social benefit, economic benefit, enjoyment, community effect, and reputation). Second, enjoyment, mass media, reputation, social benefit, home education and school education values were variables that influenced the using participation intention for CC. Third, the major variables influencing the providing participation intention CC were home education, enjoyment, gender, community effect, and mass media values.

• Journal of the Korean Institute of Gas
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• v.8 no.3 s.24
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• pp.37-42
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• 2004

This study established a catastrophic scenario and a likely scenario by qualitative and quantitative risk assessments to consider climate condition with season, and assessed efficiency of safety management cost with scenarios by cost-benefit analysis. As results, the catastrophic scenario was the maintenance error for unsteady state operation, and the likely scenario was the gas release accident at node $\sharp$4 of HAZOP Also, benefit/cost ratios for total safety management cost and effective items of safety management could be assessed at each scenario.

• Journal of Electrical Engineering and Technology
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• v.13 no.2
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• pp.659-668
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• 2018

This paper proposes an optimization approach of a grid-connected photovoltaic and wind hybrid energy system including energy storage considering voltage fluctuation in the electricity grid. A techno-economic analysis is carried out in order to minimize the size of hybrid system by considering the benefit-cost. Lithium-ion battery type is used for both managing the electricity selling to the grid and reducing voltage fluctuation. A new technique is developed to limit the voltage perturbation caused by the solar irradiance and the wind speed through determining the state-of-charge of battery for every hour of a day. Improved particle swarm optimization (PSO) methods, referred to as FC-VACPSO which combines Fast Convergence Particle Swarm Optimization (FCPSO) method and Variable Acceleration Coefficient Based Particle Swarm Optimization (VACPSO) method are used to solve the optimization problem. A comparative study has been performed between standard PSO method and PSO based methods to extract the best size with the benefit cost. A sensitivity analysis has been studied for different kinds and costs of batteries, by considering variable and constant state-ofcharge of battery. The simulations, performed under Matlab environment, yield good results using the FC-VACPSO method regarding the convergence and the benefit cost of the hybrid system.