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Dynamic Behavior of Sleeper Floating Track System(STEDEF) on Urban Rapid Transit According to Replacement of Resilience Pad (도시철도 침목플로팅궤도(STEDEF) 침목방진패드 교체에 따른 동적 거동)

  • Choi, Jung-Youl;Bong, Jae-Gun;Lee, Jeong-sug;Han, Jae-Min;Chung, Jee-Seung
    • The Journal of the Convergence on Culture Technology
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    • v.6 no.3
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    • pp.335-340
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    • 2020
  • The purpose of this study was to compare the dynamic behavior of STEDEF track that of the sleeper floating track on urban rapid transit according to replacing the resilience pads and analyze the necessity of replacing the resilience pads experimentally. It was analyzed that the uniformity of the track support stiffness could be secured by replacing the used resilience pads with new resilience pads. Therefore, by replacing the used resilience pads, the measured track impact factor was found to be dramatically reduced below the track design standard, and it was analyzed that the track support stiffness could be restored to the design value. As a results, it is possible to restore track support stiffness to the design value and reduce track impact factor by replacing timely resilience pads, which is important to securing durability and improving service life of track components.

A Study on the Differences in Hotel Choice Factors according to the Payment Level of Accommodation Charge (숙박비 지불수준에 따른 호텔선택요인 차이연구)

  • Nam, Taeg-Yeong
    • The Journal of the Convergence on Culture Technology
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    • v.6 no.3
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    • pp.33-43
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    • 2020
  • The purpose of this study is to investigate the level of payment of accommodation charge to hotel customers and to analyze the differences in hotel choice factors according to the level of payment(low, medium and high prices) to present marketing measures for attracting customers by hotel price range. To achieve the purpose of research, a survey was conducted on hotel customers from February 1, 2020 to April 30, 2020. A total of 350 questionnaires were distributed, eliminating 45 inappropriate copies for analysis, and finally utilizing 305 questionnaires for analysis. According to the analysis, among the basic factors, the biggest difference between groups was hotel size, breakfast menu, restaurants, and auxiliary facilities. It was analyzed that there are differences between groups in the amenity section in the room factor and outside tourism programs in the incidental factor. The main factors were analyzed as the most important factor, although there were no differences between groups. Based on this, the marketing plan is proposed as follows. Low-cost hotels are targeted at women in their 20s with high school diplomas, and it is recommended to have low-cost price policies and promotions. Mid-priced hotels are targeted at men in their 40s with college degrees, and they should strive to operate shuttle buses, promote room prices, and educate employees. In the case of high-priced hotels, it was analyzed that overall service reinforcement, employee education, and viral marketing are important, targeting high school graduates in their 20s.

A Study on the Current Status and Improvement of Advertising on the Copyright Infringement Websites (저작권 침해 웹사이트 내 광고 현황과 개선방안에 관한 연구)

  • Hwang, Jang-Sun;Kim, Woon-Han;Ji, Won-Bae
    • The Journal of the Convergence on Culture Technology
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    • v.6 no.3
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    • pp.83-90
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    • 2020
  • Recently, a growing number of copyright infringement websites have illegally copied and posted works such as broadcasting, movies and music, and posted advertisements to make profits. The research is aimed at finding solutions by analyzing the current status of advertisements on copyright infringement websites. The results of this study are as follows. First of all, there are many advertisements harmful to teenagers, such as casinos, betting, games, adult products, and adult meeting, which is necessary to deal with. Secondly, there were many unethical advertisements on copyright infringement websites, but there were also many advertisements from famous companies. Advertisements from large companies and famous brands are also being executed continuously, which can create trust in illegal sites. Therefore, the government, advertisers, citizens, and academia should participate in a campaign to root out the use of illegal websites because it is impossible to eradicate them by crackdown alone. In this paper, we pointed out the practical problems of advertising execution, the main source of revenue for copyright infringement websites, and presented a comprehensive solution.

The Effects of Apartment Facility Maintenance on the Residential Satisfaction of Residents (아파트 시설물 유지관리가 입주자의 주거만족도에 미치는 영향)

  • Kim, Myung-Hee;Kong, Ha-Sung
    • The Journal of the Convergence on Culture Technology
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    • v.6 no.3
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    • pp.175-183
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    • 2020
  • This study suggests a solution regarding the effects of apartment facility maintenance and fire safety facility maintenance on the residential satisfaction of residents. The results are as follows. Firstly, facility maintenance had a negative effect on residential satisfaction. Analysis revealed that residential satisfaction decreased the more breakdowns there were in the facilities. This revealed that when maintenance staff neglect the residents' complaints due to the repetitive aspect of their jobs, there was a negative effect on residential satisfaction; therefore, residential satisfaction must be increased by maintaining the facilities well and training support for maintenance staff. Secondly, fire safety facilities had a negative effect on residential satisfaction. Analysis revealed that residential satisfaction decreased the more malfunctions there were in the fire safety facilities and the more replacements there were in fire fighting equipment. This revealed the importance of safety and the fact that the apartment heavily relies on fire safety facilities because there may be a low awareness regarding safety; therefore, maintenance staff must lower the damage from fire safety facilities and to increase the residential satisafaction of residents. Lastly, there needs to be repetitive training and education for residents regarding fire fighting and evacuating in accordance with the fire fighting plan as a means to strengthen residents' safety awareness.

Classification of Fire Causes in Warehouses Using the TRIZ Technique and Analysis of Preventive Measures Accordingto 4M (TRIZ기법에 의한 물류창고의 화재원인 및 4M에 따른 예방대책 분석)

  • Han, Sang-Hun;Kong, Ha-Sung
    • The Journal of the Convergence on Culture Technology
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    • v.6 no.3
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    • pp.401-412
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    • 2020
  • This study analyzed the causes of warehouse fires using a creative problem-solving technique called TRIZ. It identified preventive measures by applying 4M. The results are as follows. First, this study examined the inconsistency among the causes of warehouse fires using TRIZ. Second, it analyzed human factors and fire prevention measures in warehouses such as safety standards for managers, and methods for the promotion of safety consciousness among workers, and for the reinforcement of construction technology for sandwich panel workers. Third, it identified the mechanical and facility factors and fire prevention measures in warehouses such as safety facilities, the expanded installation of safety devices, the adoption and development of fire suppression equipment, and the deployment of methods to improve the fire resistance of sandwich panels. Fourth, it presented working and environmental factors and fire prevention measures in warehouses such as the tightening of safety precautions and the supervision of working methods, and setting fire partitions both in loading places and based on performance-based design. Finally, it proposed managerial factors and fire prevention measures in warehouses such as specific targeting for firefighting with low fire hazards, reviewing the material quality regulations of non-combustible or higher for sandwich panels in the specific target of firefighting that cannot apply fire safety standards, installing sprinklers in cold storage, and mandating the installation of automated facilities with retroactive application regardless of the floor area in the warehouse with a sandwich panel structure.

Prediction model of osteoporosis using nutritional components based on association (연관성 규칙 기반 영양소를 이용한 골다공증 예측 모델)

  • Yoo, JungHun;Lee, Bum Ju
    • The Journal of the Convergence on Culture Technology
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    • v.6 no.3
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    • pp.457-462
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    • 2020
  • Osteoporosis is a disease that occurs mainly in the elderly and increases the risk of fractures due to structural deterioration of bone mass and tissues. The purpose of this study are to assess the relationship between nutritional components and osteoporosis and to evaluate models for predicting osteoporosis based on nutrient components. In experimental method, association was performed using binary logistic regression, and predictive models were generated using the naive Bayes algorithm and variable subset selection methods. The analysis results for single variables indicated that food intake and vitamin B2 showed the highest value of the area under the receiver operating characteristic curve (AUC) for predicting osteoporosis in men. In women, monounsaturated fatty acids showed the highest AUC value. In prediction model of female osteoporosis, the models generated by the correlation based feature subset and wrapper based variable subset methods showed an AUC value of 0.662. In men, the model by the full variable obtained an AUC of 0.626, and in other male models, the predictive performance was very low in sensitivity and 1-specificity. The results of these studies are expected to be used as the basic information for the treatment and prevention of osteoporosis.

Natural herbal extract complex induces the degradation of alcohol and acetaldehyde and reduces the breath alcohol concentration (천연소재복합물의 알코올 및 아세트알데히드 분해활성 및 호기중 알코올 농도 감소)

  • Hwang, Ji Hong;Kim, Mi-Yeon
    • The Journal of the Convergence on Culture Technology
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    • v.6 no.3
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    • pp.381-392
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    • 2020
  • This study is purposed to check up the natural 12 kinds of herbal extracts suitable for hangover and based on the results of contents of phenolic compounds, ABTS radical scavenging activity, alcohol dehydrogenase (ADH), and acetaldehyde dehydrogenase (ALDH). Selected 8 kinds of herbal extracts are blended according to the efficacy and the pearson's correlation between each content and activity. C. sinensis var. sinensis, P. densiflora Gnarl and P. lobata Ohwi showed excellent ADH activity, P. lobata Ohwi had a strong correlation between the content and efficacy, and C. sinensis var. sinensis, P. densiflora Gnarl had a negative correlation. Through the ADH and ALDH activity test of F.1 to F.7, the F.7 showed the highest synergic effect and selected as an optimal formulation. F.7 intake-group, the breath alcohol concentration was significantly reduced to 58% after 30 minutes and 27% after 120 minutes, compared to right after alcohol consumption. After alcohol consumption, there was a significant improvement effect (p<0.05) in tired and thirst in the intake group compared to the non-intake group.

Information System Evaluation using IPA Method (IPA 기법을 활용한 정보시스템 평가)

  • Park, Minsoo
    • The Journal of the Convergence on Culture Technology
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    • v.6 no.3
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    • pp.431-436
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    • 2020
  • Information service organizations that provide science and technology information with a relatively short information life cycle for free or paid are in need of reflecting rapidly changing user needs and behaviors and grafting the latest technologies. The purpose of this study is to derive improvements for each system by comparing and analyzing general recognition of science and technology information users' domestic and foreign science and technology information sites and importance by science and technology information attributes. A total of 816 users of science and technology information participated in the online survey, and the collected data were analyzed by quantitative methods including IPA (Importance Performance Analysis) technique. The importance was evaluated by the impact value calculated through regression analysis. As a result of data analysis, the general recognition of users on science and technology information sites was relatively high in national science and technology information services, and Google Scholar and Science Direct were also high. Google Scholar was found to have more strength than improvement. A better understanding of the user's preferred system is a good driving force for improving the lack of existing systems. It is necessary to improve the information retrieval of the science and technology information service system, that is, to improve the search speed and functions, and also to improve the user interface with improved convenience and usability.

Calculation of Failure Load of V-shaped Rock Notch Using Slip-line Method (Slip-line법을 이용한 V형 암석 노치의 파괴하중 계산)

  • Lee, Youn-Kyou
    • Tunnel and Underground Space
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    • v.30 no.4
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    • pp.404-416
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    • 2020
  • An analytical procedure for calculating the failure load of a V-shaped rock notch under two-dimensional stress conditions was developed based on the slip-line plastic analysis method. The key idea utilized in the development is the fact that the α-line, one of the slip-lines, extends from the rock notch surface to the horizontal surface outside the notch when the rock around the notch is in the plastic state, and that there exists an invariant which is constant along the α-line. Since the stress boundary condition of the horizontal surface outside the rock notch is known, it is possible to calculate the normal and shear stresses acting on the rock notch surface by solving the invariant equation. The notch failure load exerted by the wedge was calculated using the calculated stress components for the notch surface. Rock notch failure analysis was performed by applying the developed analytical procedure. The analysis results show that the failure load of the rock notch increases with exponential nonlinearity as the angle of the notch and the friction of the notch surface increase. The analytical procedure developed in this study is expected to have applications to the study of fracture initiation in rocks through wedge-shaped notch formation, calculation of bearing capacity of the rock foundation, and stability analysis of rock slopes and circular tunnels.

A Study on the Foundation Characteristics of Vertical Garden (수직정원의 기반 특성에 관한 연구)

  • Hong, Kwang-Pyo;Hong, Seung-Hoon;Jin, Hey-young;LEE, Hyukjae
    • The Journal of the Convergence on Culture Technology
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    • v.6 no.3
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    • pp.301-306
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    • 2020
  • The vertical garden is an environment where plants have many limitations in their growth. In particular, the upper and lower parts of the foundation are characterized by unbalanced moisture distribution. And although it may vary depending on the installation location of the light, generally the base of the light is not in desperate need for plants to grow due to shade. The purpose of this study was to identify the physical characteristics of the vertical garden based on Felt through experiments, classify the location characteristics of the media, and suggest the method of installing the water quantity water frequency, and lighting according to the location characteristics of the foundation. As a result, it was found to be most appropriate to use a 4mm base for the vertical garden and to have an irrigation of about 10 minutes once every 6 hours. In addition, it was found that in order to create a light condition for sufficient growth of plants, light bulbs should be installed at the upper and lower parts of the foundation. As a result of irrigation and lighting tests, the results of the above-mentioned plants need to be referred to in selecting plants that are introduced to vertical gardens, as the results show that the upper part of the foundation has a lower moisture rate and a stronger light than the lower part, and the lower part has a higher moisture rate and a weaker light than the upper part. In the future, we would like to present more accurate methods of selecting and maintaining plants by conducting plant experiments using the underlying characteristics found in this study.