• Title/Summary/Keyword: Generation Sector

Search Result 283, Processing Time 0.02 seconds

Analytical Evaluation of FFR-aided Heterogeneous Cellular Networks with Optimal Double Threshold

  • Abdullahi, Sani Umar;Liu, Jian;Mohadeskasaei, Seyed Alireza
    • KSII Transactions on Internet and Information Systems (TIIS)
    • /
    • v.11 no.7
    • /
    • pp.3370-3392
    • /
    • 2017
  • Next Generation Beyond 4G/5G systems will rely on the deployment of small cells over conventional macrocells for achieving high spectral efficiency and improved coverage performance, especially for indoor and hotspot environments. In such heterogeneous networks, the expected performance gains can only be derived with the use of efficient interference coordination schemes, such as Fractional Frequency Reuse (FFR), which is very attractive for its simplicity and effectiveness. In this work, femtocells are deployed according to a spatial Poisson Point Process (PPP) over hexagonally shaped, 6-sector macro base stations (MeNBs) in an uncoordinated manner, operating in hybrid mode. A newly introduced intermediary region prevents cross-tier, cross-boundary interference and improves user equipment (UE) performance at the boundary of cell center and cell edge. With tools of stochastic geometry, an analytical framework for the signal-to-interference-plus-noise-ratio (SINR) distribution is developed to evaluate the performance of all UEs in different spatial locations, with consideration to both co-tier and cross-tier interference. Using the SINR distribution framework, average network throughput per tier is derived together with a newly proposed harmonic mean, which ensures fairness in resource allocation amongst all UEs. Finally, the FFR network parameters are optimized for maximizing average network throughput, and the harmonic mean using a fair resource assignment constraint. Numerical results verify the proposed analytical framework, and provide insights into design trade-offs between maximizing throughput and user fairness by appropriately adjusting the spatial partitioning thresholds, the spectrum allocation factor, and the femtocell density.

A Case Study on the Local-based Welfare Facilities of Urban Renaissance Agency in Japan by Business Entry System for Stable Living (일본 UR도시기구의 안심주공간사업자참여제도를 통한 지역복지거점시설 정비사례 연구)

  • Yoo, Soon-Seon
    • Journal of the Korean housing association
    • /
    • v.24 no.5
    • /
    • pp.9-16
    • /
    • 2013
  • The purpose of this study is to analyze local-based social welfare facilities to respond to secular change of the UR rental housing estates in Japan. The selected case studies for the analysis are Hibarigaoka, Hamakousien, Turumai UR rental housing estates constructed around 1960's. The analysis was done through UR website, MLIT (Ministry of Land, Infrastructure, Transport and Tourism) and MHLW (Ministry of Health, Labour and Welfare) policy report, and related literature. These case studies are connected with housing policy as well as welfare policy and performed to Stable Living Creation Project by Business Entry System for Stable Living. The types of local-based social welfare facilities are classified by welfare corporation and medical corporation. The results are as follows: 1) The implementation of cooperative and participative system not only the private sector (welfare and medical Corporation, etc.) but also the public (MLIT, MHLW, UR Renaissance Agency, Local government, etc.). 2) Repurposed of land through rent and transfer of land for local-based social welfare facilities in the process of housing stock renewal utilization. 3) The pursue of regional revitalization through attached to multi-generation facility or local community space for elderly in local-based social welfare facilities.

Development of Customer-Centered Convergence Service Concepts : A Systematic Framework and a Case Study in Telecommunications Industry (고객 중심의 컨버전스 서비스 컨셉 개발 : 절차 체계 및 통신 컨버전스 서비스 사례 연구)

  • Kim, Kwang-Jae;Min, Dae-Kee;Yook, Jin-Bum;Park, Jeong-Seok;Lee, Jee-Hyung;Choi, Jae-Kyung;Ryu, Kyung-Seok
    • IE interfaces
    • /
    • v.19 no.2
    • /
    • pp.140-152
    • /
    • 2006
  • Today, many companies realize that the effort to develop new products / services faster that customers want and continue to purchase is crucial for their survival. As the service sector is rapidly growing, one of the challenges faced by the service industries is the lack of effective methodologies for new service development. This paper proposes a systematic framework for developing new service concepts, with an emphasis on generating innovative, convergence-type service concepts from the customer‘s perspective. The framework consists of three phases-identification of customer needs (Phase I), extraction of new service opportunities (Phase II), and generation of new service concepts (Phase III). The proposed framework is demonstrated through a case study in the telecommunications industry. In the case study, a survey was conducted on ten customers to identify the latent customer needs; 61 new service opportunities were extracted; and 129 new service concepts were generated.

A Study on Female′s Ideal Beauty Based on Magazine Articles - Focusing on the 80′s and the 90′s - (여성잡지를 통해본 이상적인 여성미 연구 - 80년대, 90년대 기사를 중심으로 -)

  • 이관이;이경희
    • Journal of the Korean Society of Costume
    • /
    • v.53 no.8
    • /
    • pp.65-80
    • /
    • 2003
  • The purpose of this study was to examine and fully understand the transformation of female's ideal beauty through time based on word analysis. Word selection was made from the very exemplary Women's magazines : Yuhwon, Jubu-Saengwhal, and Yuhsung-Dongah. Further, in order to research the understanding of female's ideal beauty, a random research was done on 445 women, ranging from the ages 20's through 60's. From the result, a frequency analysis was performed to further analyze the meaning of ideal beauty to each sector of the age groups for different time periods : the 1980's and the 1990's. To the 20's, beauty awareness was defined by the word ‘intelligence’, however, the 1980's endorsed confidence with composure and calmness where as the 1990's preferred beauty to be defined by ‘refinement and goal oriented’. The 30's selected ‘individuality’ marked with confidence in character, but there was a shift from ‘mature intelligence’ in the 1980's to ‘professionalism’ in the 1990's. The 40'E chose mediocrity and commonness, however, likewise, a sense of ‘earnestness’ for life and family was looked upon as beautiful. For the 50's, comfort with a reserved tenure was frequently noted and for the 60's, women chose ‘health and independence’ as describing ideal beauty. The results from the research are justifiable because the articles are in a neutral perspective and are from the representative women's magazines. This research proved that the younger the age group, the more exterior beauty was considered, as opposed to the older generation who found inner beauty to be of most importance.

A study on User Experience for Home Appliances Experience Service Design (가전제품 체험 서비스 디자인을 위한 사용자 경험 연구)

  • Shim, Soo-Yeon;Kim, Seung-In
    • Journal of Digital Convergence
    • /
    • v.18 no.2
    • /
    • pp.439-445
    • /
    • 2020
  • This is a user experience study of factors that should be considered in designing home appliances experience service. Untact services are emerging, but the development of home appliances sector is in early stage. Based on the six factors of Stephen P. Anderson's Creating Pleasurable Interface Model, this study conducted surveys, 1:1 in-depth interviews, and participation observations to measure and analyze user experience. In this study, I compared 4060s and 2030s's user experience in that the untact services raise the digital alienation among middle-senior-aged. As a result, there were significant differences between the two, including the opposite satisfaction in terms of reliable, usable and pleasurable factors. I hope that this study will be of strategic help in designing future home appliance experience services.

The Recruiting Experience of Chief Executive Nurses in Small and Medium-sized Hospitals (중소병원 간호부서장의 간호사 채용 경험)

  • Park, Song-Yi;Park, Seen-You
    • Journal of Digital Convergence
    • /
    • v.18 no.2
    • /
    • pp.301-312
    • /
    • 2020
  • This is a user experience study of factors that should be considered in designing home appliances experience service. Untact services are emerging, but the development of home appliances sector is in early stage. Based on the six factors of Stephen P. Anderson's Creating Pleasurable Interface Model, this study conducted surveys, 1:1 in-depth interviews, and participation observations to measure and analyze user experience. In this study, I compared 4060s and 2030s's user experience in that the untact services raise the digital alienation among middle-senior-aged. As a result, there were significant differences between the two, including the opposite satisfaction in terms of reliable, usable and pleasurable factors. I hope that this study will be of strategic help in designing future home appliance experience services.

New Roles of the Professional Nursing in the Era of e-Health/u-Health (e-Health/u-Health 시대를 대비한 간호의 역할 확대)

  • Kim, Jeong-Eun
    • Perspectives in Nursing Science
    • /
    • v.5 no.1
    • /
    • pp.59-71
    • /
    • 2008
  • e-Health/u-Health has generally been considered as an expansion of current medical and medical relevant segments. However. as e-Health/u-Health has been known to have typical attributes and characteristics of services supporting a physically and mentally well-balanced life of its users, we can rationally assume that e-Health/u-Health can be not only an expansion of the existing medical field but also a result of the complex and sophisticated convergence among diverse industries such as the ICT industry. traditional care-relevant segments, etc. Thus, in this study, we carefully and cautiously consider e-Health/u-Health in accordance with both possible scenarios: 1) an expansion of a typical industry, and 2) a result of a convergence among various industries. The advent of new technologies, rapid development of current technologies, and convergence trends in various fields are creating dramatic innovations in the next generation health services market. Consumerism as a characteristic of c-Health/u-Health can be expected to find a solution of the existing healthcare service problems. In the initial phase. mainly due to the absence of a vanguard, as well as to various legalistic and regulative limitations, the role of the government would be immensely critical for the successful early settlement of the e-Health/u-Health industry. Both the government and private sector need to practice continuous and effective public education and publicity mainly to increase the overall recognition and usability of e-Health/u-Health services. Nursing as a unique professional discipline should be well aware of the new paradigm shift of the healthcare market, and make maximum use of the possibility of this trend to the advent of the professional nursing's new role.

  • PDF

SLM using GIS data formats for 3D virtual model of research (SLM 포맷을 이용한 GIS 데이터의 3D 가상모델에 대한 연구)

  • Han, Jeong-Ah;Seo, Laiwon
    • Journal of Digital Contents Society
    • /
    • v.15 no.1
    • /
    • pp.113-120
    • /
    • 2014
  • In recent years, devices using the smart ponwa IT service is activated, to research how the fusion of two or more devices will be able to be interest in the soybeans. One of them in the mobile sector through the development of network and hardware digital geo-spatial map of the rapid advances being made and the computer, how do you map data to efficiently simulate a 3D environment, providing services through a virtual environment focused on whether be. In this study, augmented reality and GIS (Geographic Information System), SLM (Static LOD Model) that combines augmented reality technology on the basis of the basic concepts and approaches in geographic space and how Augmented Reality Based on this interpretation of the relevant content What to do in the development and utilization has a purpose. In this study, the conventional SLM 3DS model data structure of a data format conversion of the proposed possibilities for analyzing and, SLM model generation and format of the existing three-dimensional visualization tools SLM model format for converting a format to a model function, and visualization features. In addition, 3D virtual model to propose a format for efficiently making.

Analysis on Housing Energy for Applying Geothermal System in Mongolia (몽골에서의 지열 시스템 적용을 위한 주택 에너지분석)

  • Kim, Jin-Ho;Kim, Joong-Hun;Shin, Seung-Ho
    • Journal of the Korean Society for Geothermal and Hydrothermal Energy
    • /
    • v.10 no.2
    • /
    • pp.19-23
    • /
    • 2014
  • In the capital of Mongolia where the air quality is getting worse due to the coal consumption used for electricity generation and district heating, the application of geothermal systems in the housing sector is recently designed for high class resort. In this study, the case of applying a geothermal system in a house in Mongolia is examined. The effects of passive house design on the needed heat pump capacity, as well as the annual energy consumption are analyzed. Moreover, as the initial costs, except labor fee, are assumed similar to Korea, cost analysis for several cases is examined, too. From the results, if a house is designed according to passive house standard instead of ASHRAE standard, the heat pump capacity can be expected to be reduced from 16 to 5~6 RT. Furthermore, although the initial cost of architectural cost might increased by 29 M\, the total initial cost is reduced by 14 M\, while the annual energy consumption is reduced by 14%. This is mainly driven by the fact that the geothermal system which serves as the main system to cover the building needs, with a high initial cost for fulfilling the peak requirements.

Determining the Maximum Capacity of a Small Wind Turbine System Considering Live Loads of Buildings (건물의 활하중을 고려한 소형풍력발전시스템의 최대 설비용량 선정기법)

  • Lee, Yeo-Jin;Kim, Sung-Yul
    • The Transactions of the Korean Institute of Electrical Engineers P
    • /
    • v.65 no.3
    • /
    • pp.165-170
    • /
    • 2016
  • Due to environmental issues such as global warming, the reduction of greenhouse gas emissions has become an inevitable measure to be taken. Among others, the building sector accounts for 50% of total carbon dioxide emissions, which is significantly high. Therefore, in order to reduce carbon dioxide emissions of the buildings, improving the energy efficiency by utilizing wind power among renewable energy sources is recommended. In case of buildings in the planning stage, it is possible to take the load of wind power generation systems into consideration when determining installed capacity. Already completed buildings, however, should be connected to small wind electric systems according to the live loads of the buildings based on the architectural design criteria. In order to connect to a building that has already been completed, it is necessary to consider the load of the small wind electric system as well as the live load of building. In addition, we need to generate the maximum electricity possible by determining the maximum installed capacity in a small area. In this paper, we propose the method for determining maximum capacity for building integrated small wind electric systems, which takes into account the considerations associated with connecting small wind electric systems to completed buildings. This can be developed into a system linked to solar power, which makes it possible to improve the energy independence of the building. In addition, carbon dioxide reduction by improving energy efficiency is expected.