• Korean Journal of Organic Agriculture
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• v.22 no.4
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• pp.841-854
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• 2014

This study aimed to analyze the selection criteria and priority settings for solid culture medium used in hydroponic crop production in farm households. Expert brain storming was carried out to extract solid culture medium selection criteria for hydroponic farming. As a result, 3 criteria of economy (cost), productivity, and environment, and 9 factors were extracted. A questionnaire survey of hydroponic farm households was conducted in Gyeonggi, Gangwon, and Chooncheong provinces. AHP analysis of the hydroponic solid culture medium selection criteria identified productivity as the most important criterion, chosen by 58.7% of the respondents, followed by economy (28.4%) and environment (12.9%). The 9 factors were rated by the respondents in the following decreasing order of importance: 1, crop yield (28.3%); 2, pest occurrence (18.5%); 3, maintenance/management costs (12.0%); 4, convenience of maintenance/management (13.4%); 5, initial investment cost (11.6%); 6, material energy consumption (6.5%); 7, waste recyclability (4.0%); 8, waste disposal costs (3.4%); and 9 environmental emissions (1.81%). These results imply that hydroponic farm households consider cultivation-related quality factors more important than economic factors, such as price of culture medium or installation cost.

• Journal of Nutrition and Health
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• v.44 no.1
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• pp.41-48
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• 2011

Constructs with seven latent evaluation indicators and 18 observable survey questions were developed by food and nutrition experts to calculate a food safety recognition and practice index for children. The purpose of this study was to suggest statistical approaches to test construction validity on the constructs, obtain weights of the evaluation indicators, and develop questionnaires to calculate a children's food recognition and practice index. Survey data of 2,400 elementary fifth grade students were used as empirical results. Test validity was evaluated by exploratory factor analysis and confirmed to be highly significant by confirmatory factor analysis [i.e., linear structural relations (LISREL) analysis]. Standardized path coefficients of the LISREL analysis were suggested based on weights, and the weights were compared using the AHP and Delphi methods.

• Journal of the Korea Institute of Military Science and Technology
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• v.22 no.5
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• pp.705-715
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• 2019

The purpose of this study is to analyze the necessity of organizing an exclusive unit to perform the division Engineering Reconnaissance, and how to organize exclusive unit. To this end, first, it was analyzed whether exclusive unit organization was necessary by using organization-conditions and AHP. Next, through ARENA model simulation and task-analysis, it was determined how many people would be organized, and how the class structure would be appropriate. As a result, first, it is reasonable to organize the Engineering Reconnaissance unit as an exclusive unit, and the best way is to organize all-time(war/peace time). Second, the exclusive unit should be organized into a total of 10 persons(2~3 cadres, 7~8 soldiers). We hope that the research will contribute to the rational procedure of our military unit structure organization and set the standards for applying the quantitative methodology.

• Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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• v.37 no.5
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• pp.293-302
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• 2019

In mountain accident events, it is important for the search team commander to determine the search area in order to secure the Golden Time. Within this period, assistance and treatment to the concerned individual will most likely prevent further injuries and harm. This paper proposes a method to determine the search priority area based on missing persons behavior and missing persons incidents statistics. GIS (Geographic Information System) and MCDM (Multi Criteria Decision Making) are integrated by applying WLC (Weighted Linear Combination) techniques. Missing persons were classified into five types, and their behavioral characteristics were analyzed to extract seven geographic analysis factors. Next, index values were set up for each missing person and element according to the behavioral characteristics, and the raster data generated by multiplying the weight of each element are superimposed to define models to select search priority areas, where each weight is calculated from the AHP (Analytical Hierarchy Process) through a pairwise comparison method obtained from search operation experts. Finally, the model generated in this study was applied to a missing person case through a virtual missing scenario, the priority area was selected, and the behavioral characteristics and topographical characteristics of the missing persons were compared with the selected area. The resulting analysis results were verified by mountain rescue experts as 'appropriate' in terms of the behavior analysis, analysis factor extraction, experimental process, and results for the missing persons.

• Proceedings of the Korea Water Resources Association Conference
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• 2016.05a
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• pp.257-257
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• 2016

현재 전 세계적으로 이상기후로 인해 자연재해가 증가하고 있으며, 우리나라 또한 집중호우, 태풍, 홍수 등의 자연재해로 인해 경제적 손실뿐만 아니라 인명피해도 증가하는 추세이다. 2014년도에만 약 2천억원의 재산피해가 발생 하였고, 5천억원 이상이 피해를 복구하는데 사용되었으며, 피해금액과 복구금액은 지속적으로 증가하고 있다. 최근 발생한 토사재해의 경우에는 인구가 밀집한 도심지에서 발생하여 매우 단기간에 치명적인 피해를 야기 시키고, 사회적 관심을 크게 일으키기도 했다. 이처럼 자연재해가 인구가 밀집되어있고, 사회적재화가 많은 도심에서 발생할 경우 그 피해규모는 더욱 커질 수 있으므로 이에 대한 적절한 대응방안이 마련되어야 한다. 본 연구에서는 대구지역에 대한 토사재해를 물리적 취약성과 사회적 취약성으로 구분하여 평가하고 이를 종합하여 평가하였다. 물리적 취약성은 Flow-R 모형을 사용하여 토사재해의 발생 가능성 및 정도를 평가하고, 발생지역의 건물 구분에 따라 그 취약성의 정도를 달리하였다. 사회적 취약성의 경우는 대구지역의 집계구 단위를 기준으로 하여, 다양한 사회적 지표에 계층분석법(Analytic Hierarchy Process, AHP)을 적용하여 지표에 대한 가중치를 산정하였다. 이후 물리적 취약성과 사회적 취약성의 값을 0에서 1사이로 정규화 시키고 정규화된 값을 다시 곱하여 0에서 1사이로 정규화 하여 취약성 정도로 나타내었다. 본 연구결과는 대구지역에 대한 토사재해의 취약성을 평가함으로써 대구 도심지에서 발생할 수 있는 토사재해 위험구역을 선정하고 방재시설을 준비하는데 있어서 기초자료로 활용될 수 있을 것으로 판단된다.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2019.11a
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• pp.187-188
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• 2019

The supply of apartments has continuously increased, and the housing supply rate has exceeded 100 percent and the demands and standards of tenants have also been raised as technology has developed. This has led to the conflict and caused social and economic losses. In this study, the case investigation and research methods of the prior research are analyzed as the basis for identifying the defects cases of causes and influences occurring in the apartment building. To analyze various studies, we divided the prior research into the defect management process and the study on the type of defects and countermeasures, and investigated the features and limitations. Future research will be conducted on apartment buildings within 10 years of completion among conglomerate's nationwide apartments to compensate for the limitations of prior research. In addition, AHP static method and relational chart will be used to identify the relationship between the type of defect and the cause and the importance of the influencing factors.

• Proceedings of the Korea Water Resources Association Conference
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• 2018.05a
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• pp.437-437
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• 2018

본 연구는 댐 후보지에 대한 우선순위 분석이 결측 정보에 따라 다기준 의사결정 방법 및 결측정보 접근방법에 따라 어떻게 달라지는지를 조사하였다. 전략환경평가(Strategic Environmental Assessment, SEA)는 한국의 댐 건설 장기 계획에서 환경 및 생태학적 영향을 기반으로 한 지속가능한 댐 후보지 선정에 적용되고 있다. 그러나 특정 정보가 결측된 경우 SEA는 댐 후보지를 선정하는 데 어려움이 있다. 본 연구에서는 다기준 의사결정 방법으로 AHP, ELECTRE III, PROMETHEE II, Compromise Programming을 적용하였고, 결측 정보 보완을 위해 이항분포와 균등분포형을 사용하였다. 본 연구에서는 전국의 댐 선정 후보지에 적용하여 다중 기준 의사 결정기법과 정보 생성 방법에 의존하여 결과를 비교하였다. 그 결과, 이항분포형을 적용한 결과가 균등분포형을 적용한 결과보다 보다 명백한 우선순위를 보여 주었다. 또한, 다기준 의사결정방법에 따라서는 댐선정 후보지 결과가 달라지지 않는 것으로 나타났다. 따라서, 다기준 의사결정방법 적용시, 결측 정보를 생성하기 위해 이항분포를 사용하면 균등분포 적용시보다 우선순위를 제공하는데 더 효과적이라고 판단된다.

• Ocean Systems Engineering
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• v.5 no.3
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• pp.161-179
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• 2015

An emergency response system (ERS) for vessel oil spills is a complex and dynamic system comprising a number of subsystems and activities. Failures may occur during the emergency response operations, this has negative impacts on the effectiveness of the ERS. Of the classes of problems in analyzing failures, the lack of quantitative data is fundamental. In fact, most of the empirical data collected via questionnaire survey is subjective in nature and is inevitably associated with uncertainties caused by the human being's inability to provide complete judgement. In addition, incomplete information and/or vagueness of the meaning about the failures add difficulties in evaluating the effectiveness of the system. Therefore this paper proposes a framework to evaluate the ERS effectiveness by using the combination of fuzzy reasoning and evidential synthesis approaches. Based on analyzing the procedure of ERS for oil spills, the failures in the system could be identified, using Analytic Hierarchy Process(AHP)to determine the relative weight of identified failures. Fuzzy reasoning combined with evidential synthesis is applied to evaluate the effectiveness of ERS for oil spills under uncertainties last. The proposed method is capable of dealing with uncertainties in data including ignorance and vagueness which traditional methods cannot effectively handle. A case study is used to illustrate the application of the proposed method.

• Journal of the Korea Safety Management & Science
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• v.14 no.4
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• pp.303-311
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• 2012

Recently SW is the key industry which leads the HW industry and service industry, but market size of SW is only 0.9% of GDP. It is necessary systematic and strategic support to create new SW market through SW convergence and to secure the global competitiveness. This paper deals with some strategic suggestions for progress of SW industry in company with regional economy. We survey and analyze the many SW support projects by government and take professional advice from some specialists of regional information industry promotion agency. We draw 10 strategic suggestions for support of SW industry. Also we analyze the relative importance of 10 strategic suggestions by AHP analysis.

• The Korean Journal of Emergency Medical Services
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• v.25 no.2
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• pp.7-18
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• 2021

Purpose: This study aimed to present the learning items of indirect practice as an alternative means of ambulance riding practice. Methods: Twelve on-site professionals participated in testing the effectiveness of learning items of utility value in indirect experience practice among the recommended learning objectives of ambulance ride practice using the modified Delphi technique. To validate the learning objectives, the Delphi technique was used to check content validity, and analytic hierarchy process (AHP) analysis was used to analyze the weighting value. Results: As the learning goal of indirect experience practice replaced the ambulance riding practice, four items were derived in consideration of practicality. These items were consistent with the Delphi panel's consistency index, convergence, and agreement. The first learning item to consider was 'Prevention of infection and risk of infection.' Conclusion: The results of this study are meaningful in that they propose the learning items that can achieve the minimum educational goal through indirect experience practice as an alternative means of ambulance training.