• Title/Summary/Keyword: environment change

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Design Healthcare Mobility Agent Module in Sensor Network (센서 네트워크에서 헬스케어 이동성 에이전트 모듈 설계)

  • Nam, Jin-Woo;Chung, Yeong-Jee
    • Journal of Korea Multimedia Society
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    • v.11 no.4
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    • pp.544-553
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    • 2008

  • The general sensor network uses bundle method to collect fixed information from sensor node. However, this method is difficult to actively cope with major sensing objects in healthcare environment including status and position change of person and change of surrounding environment. In order to support the healthcare environment, certain information should be provided in accordance with the change of status of person and surrounding circumstance and also must cope with the change of network type by movement of person. This paper analyzes LEACH protocol which guarantees effectiveness of network as it constitutes clusters between Agilla model that is a representative multi agent middle ware and surrounding nodes. Based on the result of this analysis, it suggests LEACH_Mobile protocol which guarantees node mobility that is the weakest point of LEACH protocol. Moreover, it designs mobility agent middleware which supports dynamic function change of node and mobility agent module which supports dynamic function change of mobile node as components of LEACH_Mobile routing module. In addition, it is definitely increase performance which in mobile node of transfer data rate through LEACH_Mobile protocol of simulation result.

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A Study on Ice Area and Temperature Change in River on Winter Season Using Classification Method of Satellite Image (위성 영상의 분류 기법을 활용한 겨울철 하천의 얼음 면적과 기온 변화 비교 연구)

  • Park, Sungjae;Kim, BongChan;Lee, Chang-Wook
    • Korean Journal of Remote Sensing
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    • v.37 no.6_1
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    • pp.1599-1610
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    • 2021

  • The natural environment and local ecosystem change depending on various factors, but among them, the change in water temperature is one of the major factors affecting the surrounding environment in the river ecosystem. However, research on water temperature change have not been actively conducted to date compared to the effect of water temperature on the river environment. Therefore, this study intends to study the change in water temperature from 2015 to 2021 through the change in the area of winter ice in the Hongcheon River. Optical satellite images were classified by referring to the field survey results, and the SAR satellite imagestried to overcome the limitations of the input data by using the GLCM texture analysis method. After verifying the accuracy of all images used, the calculated monthly average ice area was compared with the temperature data of the adjacent AWS. It was found that there is a correlation between water temperature and ice area, and the results of this study can be used to study environmental changes in small-scale rivers that are difficult to access or do not have systems in place.

  • https://doi.org/10.7780/kjrs.2021.37.6.1.9 인용 PDF KSCI HTML

Comparing building performance of supermarkets under future climate change: UK case study

  • Agha Usama Hasan;Ali Bahadori-Jahromi;Anastasia Mylona;Marco Ferri;Hexin Zhang
    • Advances in Energy Research
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    • v.8 no.1
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    • pp.73-93
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    • 2022

  • Focus on climate change and extreme weather conditions has received considerable attention in recent years. Civil engineers are now focusing on designing buildings that are more eco-friendly in the face of climate change. This paper describes the research conducted to assess the impact of future climate change on energy usage and carbon emissions in a typical supermarket at multiple locations across the UK. Locations that were included in the study were London, Manchester, and Southampton. These three cities were compared against their building performance based on their respective climatic conditions. Based on the UK Climatic Projections (UKCP09), a series of energy modelling simulations which were provided by the Chartered Institute of Building Service Engineers (CIBSE) were conducted on future weather years for this investigation. This investigation ascertains and quantifies the annual energy consumption, carbon emissions, cooling, and heating demand of the selected supermarkets at the three locations under various climatic projections and emission scenarios, which further validates annual temperature rise as a result of climatic variation. The data showed a trend of increasing variations across the UK as one moves southwards, with London and Southampton at the higher side of the spectrum followed by Manchester which has the least variability amongst these three cities. This is the first study which investigates impact of the climate change on the UK supermarkets across different regions by using the real case scenarios.

  • https://doi.org/10.12989/eri.2022.8.1.073 인용