• Title/Summary/Keyword: 문제해결

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Assessment of Wind Energy Potential around Jeju Coastal Area (제주 연안지역 주변의 잠재 풍력에너지 평가)

  • Kim, Nam Hyeong;Jin, Jung Woon
    • KSCE Journal of Civil and Environmental Engineering Research
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    • v.30 no.6B
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    • pp.617-625
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    • 2010
  • The selection of a site where strong wind blows is important to increase effectively the electricity of wind power in proportion to the cube of the wind speed. It is advisable to establish the wind turbine in the coastal area with strong wind speed rather than in the inland. And the development of offshore wind energy is expected to solve the noise problem that is one of the important weaknesses in the wind turbine. In the process of the development business of wind energy, knowing forehead the wind power possibility in any area is one of the essential factors to choose the most optimum site of wind power. In this paper, the potential of wind power around JeJu coastal area is examined by using the wind data that Korea Meteorological Administration has surveyed for 10 years in 14 observation points. Wind speed data is revised to wind speed in 80 meters assuming installation height of the wind turbine, and wind power density and annual wind energy are also calculated. And annual electricity generation and percent of energy efficiency in all the observation points are estimated by using the information about 3,000 KW wind turbine.

Engineering Properties of Liquefied Stabilized Soil by Contents of Humic Acid (휴믹산 함유량에 따른 유동화 처리토의 공학적 특성)

  • Han, Sang-Jae;Ahn, Dong-Wook;Park, Jea-Man;Kim, Soo-Sam
    • KSCE Journal of Civil and Environmental Engineering Research
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    • v.29 no.5C
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    • pp.229-237
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    • 2009
  • A conventional way of backfilling has used sand or in-situ soil. It not only requires substantial amount of time and cost but also makes it particularly difficult to fill the bottom part and small cracks of a pipe. To address the problem with the conventional method of compaction, liquefied stabilized soil was proposed as an alternative because it reuses in-situ soil which can ensure sand supply while adjusting flowability and strength of the soil with design of mix proportion. With an aim to identify the mixing properties of liquefied stabilized soil depending on the organic content of in-situ soil, this study conducted indoor tests of material segregation, flowability, strength, and permeability by changing humic acid content of the soil. The results revealed that material segregation and flowability increased proportionally while strength decreased with the increased amount of humic acid. In the mean time, permeability of liquefied stabilized soil wasn't affected by organic content.

Relationship between Sensory Processing and Personality in College Students (대학생의 감각처리와 성격의 관계)

  • Lee, Chunyeop;Jung, Namhae
    • The Journal of Korean Academy of Sensory Integration
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    • v.21 no.1
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    • pp.1-10
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    • 2023
  • Objective : This study aimed to identify the relationship between sensory processing and personality in college students by using five personality factors. Methods : The study was conducted between October and December 2022 with 149 college students majoring in health studies. Sensory processing was evaluated using the Adolescent/Adult Sensory Profile (AASP), and personality was evaluated using the International Personality Item Pool (IPIP). The data collected were analyzed by descriptive statistics, frequency analysis, and Pearson correlation analysis, and the Statistical Package for the Social Sciences (SPSS) was used. Results : Extraversion and agreeableness showed a significant correlation with all sensory processing types. Neuroticism showed a positive correlation with all types of sensory processing other than sensory seeking, while openness to experience showed a positive correlation with sensory seeking. Conscientiousness showed a negative correlation with low registration and sensory sensitivity type (p<.01). Conclusion : This study found a relationship between sensory processing type and personality type through an evaluation of five personality in college students. This information can be used to find solutions to various problems that college students.

Impact of Sales Franchisor's Relationship-oriented Efforts on Relationship Quality and Recontract Intentions: From the Franchisee Perspective (판매 프랜차이즈 가맹본부의 관계지향적 노력이 가맹점의 관계품질과 재계약의도에 미치는 영향)

  • Hwang, Jae Kwang;Yang, In Seok;Lee, Yun Bok
    • The Korean Journal of Franchise Management
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    • v.5 no.2
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    • pp.25-49
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    • 2014
  • This study is to examine the impact of sales franchisor's relationship-oriented efforts(flexibility, problem solving support, customization, information exchange, and supervisor characteristics) on relationship quality(satisfaction, trust, and commitment) and recontract intentions. In order to analyze proposed model, this study collected the 233 franchisees with owner or hired manager. The data were analyzed with SPSS/PC 18.0 and AMOS 18.0. First, to test unidimensionality and nomological validity of the measures of each construct we employed a scale refinement procedure. The result of reliability test with confirmatory factor analysis warranted unidimensionality of the measures for each construct. The findings are as follows: First, relationship-oriented efforts had positive effects on relationship quality (satisfaction, trust, and commitment) of franchisee. Second, satisfaction had positive effect on trust, but did not on recontract intentions. Third, trust had positive effects on commitment and recontract intentions, respectively. Finally, commitment had a positive effect on recontract intentions. At the end of this paper, managerial implications and limitations and future research directions were suggested.

A Study on Efficient Mixnet Techniques for Low Power High Throughput Internet of Things (저전력 고속 사물 인터넷을 위한 효율적인 믹스넷 기술에 대한 연구)

  • Jeon, Ga-Hye;Hwang, Hye-jeong;Lee, Il-Gu
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 2021.10a
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    • pp.246-248
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    • 2021
  • Recently data has been transformed into a data economy and society that acts as a catalyst for the development of all industries and the creation of new value, and COVID-19 is accelerating digital transformation. In the upcoming intelligent Internet of Things era, the availability of decentralized systems such as blockchain and mixnet is emerging to solve the security problems of centralized systems that makes it difficult to utilize data safely and efficiently. Blockchain manages data in a transparent and decentralized manner and guarantees the reliability and integrity of the data through agreements between participants, but the transparency of the data threatens the privacy of users. On the other hand, mixed net technology for protecting privacy protects privacy in distributed networks, but due to inefficient power consumption efficiency and processing speed issues, low cost, light weight, low power consumption Internet Hard to use. In this paper, we analyze the limitations of conventional mixed-net technology and propose a mixed-net technology method for low power consumption, high speed, and the Internet of things.

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Method recycling of incineration materials in household waste (생활폐기물 소각시설 소각재의 재활용 활성화 방안)

  • Kim, Sukhwan;Shin, Dong Won
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 2021.10a
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    • pp.153-155
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    • 2021
  • A large amount of combustible household waste are incinerated on a large scale. Incineration ashes including flooring and scattering materials are generated in the incineration facilities. The incineration materials (flooring and scattering) are generated 16.5% of the total amount ashes brought into the incinerator. The amount of incineration materials decrease the landfill period of existing landfills and increase the needs for the construction of new landfills. This study introduces technical and institutional suggestions to solve increasing incineration ash problem by recycling them. As a technical recycling method, incineration materials can be recycled by producing earthwork materials and concrete products. In addition, the government and local governments will be able to promote recycling by improving related laws such as the Waste Management Act and by preparing active institutional support measures such as incentives for recycling companies for Green New Deal strategies.

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Planning and Establishment of Sejong City Smart City (세종시 스마트시티 구상 및 수립 방안)

  • Park, Jungsu;Jung, Hanmin
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 2021.10a
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    • pp.161-163
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    • 2021
  • This urban centralization is expected to develop rapidly, with 75% of the population living in the city by 2035. Large cities are becoming unsustainable due to side effects such as environmental pollution, severe traffic jams, excessive energy depletion, and destruction of the natural ecosystem. In addition, the happiness index of citizens of large cities is also falling because of high crime rates and safety accidents, the work-life imbalance caused by inequality and polarization, and overly competitive education. To solve this problem, Smart City, an IT-based future city model, was born. The Korean government is also actively attempting to improve urban competitiveness and promote sustainable development through efficient construction and operation of smart cities as a national focus project. To support the effort, we review the basic directions and strategies of Sejong City's Smart City service infrastructure based on the comprehensive national land plan, Smart City plan, and Smart City strategy plan.

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A Study on the Calculation of the Number of Rescuers at Fire Sites Using Wireless Signals of Mobile Phones (화재 현장에서 휴대전화 무선 신호를 활용한 구조대원 투입 인원수 산출 연구)

  • Kim, Younghyun;Kim, Boseob;Lee, Sungwoo
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 2021.10a
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    • pp.275-276
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    • 2021
  • In the event of a fire in a complex, the identification of isolated people's location information is delayed, resulting in many casualties. In order to prevent such an accident, research on estimating the location of the requesters by detecting the wireless signal of the mobile phone at fire sites is in progress. The main concept is to use a wireless signal scanner to detect the wireless signal of a mobile phones at fire sites, and then position the mobile phone based on this. However, it is difficult to secure visibility at the fire site due to the smoke, and there is a difficulty in rescuing requesters in need compared with general disaster sites. Therefore, it will be one of the important issues to be solved to determine the minimum number of rescuers to be deployed according to the number and condition of the requesters. In this study, we propose a method to calculate the number of rescuers put to fire sites by using the radio signal generated from mobile phones and the information generated from the inertial sensor of the mobile phones.

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Plans for Resource Circulatory Culture Program in Sejong (세종시 자원순환사회 조성 추진 방안)

  • Kim, KyeongRae;Shin, Dong Won
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 2021.10a
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    • pp.150-152
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    • 2021
  • For the development of a resource recycling society, it is important to control the generation of waste in all processes such as production, distribution, consumption and disposal, and to recycle the recyclable resources of waste instead of simply landfilling and incineration. However, in order to develop a resource-recycling society, not only emitters, businesses, and the central government, but also local governments need to work together to find a solution. Therefore, in this study, we present a promotion strategy for the development of Sejong City's resource-recycling society, taking into consideration the current situation of Sejong City as well as changes in the government's institution system. We suggest that regionally preparing recycling priority management plan, maximizing waste resource utilization, establishing recycling industry activation plan, and building a systematic and efficient recycling platform, etc.

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Application of Informer for time-series NO2 prediction

  • Hye Yeon Sin;Minchul Kang;Joonsung Kang
    • Journal of the Korea Society of Computer and Information
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    • v.28 no.7
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    • pp.11-18
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    • 2023
  • In this paper, we evaluate deep learning time series forecasting models. Recent studies show that those models perform better than the traditional prediction model such as ARIMA. Among them, recurrent neural networks to store previous information in the hidden layer are one of the prediction models. In order to solve the gradient vanishing problem in the network, LSTM is used with small memory inside the recurrent neural network along with BI-LSTM in which the hidden layer is added in the reverse direction of the data flow. In this paper, we compared the performance of Informer by comparing with other models (LSTM, BI-LSTM, and Transformer) for real Nitrogen dioxide (NO2) data. In order to evaluate the accuracy of each method, mean square root error and mean absolute error between the real value and the predicted value were obtained. Consequently, Informer has improved prediction accuracy compared with other methods.