• Title/Summary/Keyword: sensing house

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Assessment of the Impacts of the Impervious Surface Change in the Farm Region on Watershed Hydrology (농경지 불투수면 변화에 따른 유역 수문 영향 분석)

  • Kim, Hak-Kwan;Lee, Eun-Jeong;Park, Seung-Woo;Kang, Moon-Seong
    • Journal of The Korean Society of Agricultural Engineers
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    • v.51 no.6
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    • pp.17-23
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    • 2009
  • The Soil and Water Assessment Tool (SWAT) model was used in this study to evaluate the hydrologic impacts by the impervious surface change in the farm region. The model was calibrated and validated by using four years (1999-2002) of measured data for the Gyeongancheon watershed in Korea. The simulation results agreed well with observed values during the calibration and validation periods. Land use scenarios including various changes of the plastic film house area in the farm region were applied to assess their effects on watershed hydrology. The results indicated that the surface direct (5.6%~14.0%) and total runoff (0.8%~1.5%) increased, but the groundwater discharge (10.7%~27.7%) and evapotranspiration (1.5%~3.3%) decreased as the plastic film house area (5.7%~12.4%) increased.

The Design and Implementation of Heating Control System Based on Sensor Networks (센서 네트워크 기반의 난방제어시스템 설계 및 구현)

  • Lee, Jin-Kwan;Lee, Dae-Hyung;Lee, Chang-Bok;Lee, Jong-Chan;Park, Ki-Hong
    • Convergence Security Journal
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    • v.8 no.1
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    • pp.27-33
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    • 2008
  • The object of this paper is to design a heating control system based on sensor networks for the house, integrated with computing technology. The proposed system can manage the heating by sensing and analyzing the temperature and humidity in apartment house and others. This system also is capable of giving a comfortable circumstances because the interior of a house is in heated by the sensory temperature based control system.

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The status of digital geological mapping and Clearing House in Korea

  • Yeon, Young-Kwang;Han, Joung-Kyu;Chi, Kwang-Hoon
    • Proceedings of the KSRS Conference
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    • 2002.10a
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    • pp.168-168
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    • 2002
  • KIGAM(Korea Institute of Geoscience and Mineral Resources) has finished to digitalize geological maps of 1/50, 000 scales in 1999. This project is supported by the Korea Ministry of Information and Communication under the name of "Knowledge and Information Resources Management Project". And via geo-clearing house, KIGAM has begun to sale the geological maps that are modified more correctly now June, 2002. The objective of this paper is to evaluate the status of digital geological mapping in Korea. And to introduce Clearing House and future plans of KIGAM.

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User Identification and Entrance/Exit Detection System for Smart Home (지능형 홈을 위한 사용자 식별 및 출입 감지 시스템)

  • Lee, Seon-Woo
    • Journal of Institute of Control, Robotics and Systems
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    • v.14 no.3
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    • pp.248-253
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    • 2008
  • This paper presents a sensing system for smart home which can detect an location transition events such as entrance/exit of a member and identify the user in a group at the same time. The proposed system is compose of two sub-systems; a wireless sensor network system and a database server system. The wireless sensing system is designed as a star network where each of sensing modules with ultrasonic sensors and a Bluetooth RF module connect to a central receiver called Bluetooth access point. We propose a method to discriminate a user by measuring the height of the user. The differences in the height of users is a key feature for discrimination. At the same time, the each sensing module can recognize whether the user goes into or out a room by using two ultrasonic sensors. The server subsystem is a sort of data logging system which read the detected event from the access point and then write it into a database system. The database system could provide the location transition information to wide range of context-aware applications for smart home easily and conveniently. We evaluate the developed method with experiments for three subjects in a family with the installation of the developed system into a real house.

A Study on the Energy Saving House System Using IOT Technology (IOT 기술을 활용한 에너지 절약 하우스 시스템 연구)

  • Huh, Myung-Hoi;Shin, shung-jung
    • The Journal of the Institute of Internet, Broadcasting and Communication
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    • v.20 no.6
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    • pp.109-113
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    • 2020
  • Against the backdrop of low-carbon, green growth, many attention is focused on a sustainable society where humans and nature coexist. Carbon emissions increase with energy consumption, which is 40 percent of the world's energy consumption by buildings. Korea has a plan to make zero-energy houses mandatory only for new buildings in 2025, but it is relying on private technology investment for its technology. The reality is that the current technology costs more than 1.5 times more than general buildings, and private companies do not have many zero-energy house complexes other than experimental houses. This study aims to study the new model of zero energy house by introducing IOT system that efficiently observes and controls energy in zero energy house, monitoring pleasant environment on the web and introducing resident proper temperature maintenance system.

A Study on the Acquisition and Remote-transmission of the Multi measurement data (다중계측 데이터의 취득과 원격전송에 대한 연구)

  • 주귀영;최조천
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 2000.10a
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    • pp.528-533
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    • 2000
  • This paper is concerned to remote monitoring It management system on the bring up house of agricultural, lomestic animal, aquatic products. That is necessary for traffic network and monitoring unit for transmission the environment data of temperature, humidity and electric etc.. This study is executed the experimental research for structure of system. which are composed sensing interface, multi-processing, traffic network and algorithm. Result, that is respected the effective management, increase of produce and prevent of calamity on the bring up house by low cost of set & remain.

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The Energy Analysis and Control Characteristics of a Hot Water Heating System for Apartment Houses (공동주택용 온수난방 시스템의 에너지해석 및 제어특성)

  • 장효환;안병천
    • Korean Journal of Air-Conditioning and Refrigeration Engineering
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    • v.8 no.1
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    • pp.76-87
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    • 1996
  • Energy analysis for the hot water heating control system of apartment house complex is accomplished by computer simulation. Mathematical model of a boiler, pipe network and a unit-house is developed. The effects of heating control methods on the heating performance and energy consumption of the system are investigated. The heating control methods considered in this study are a continuous heating control, and on-off heating control and an intermittent heating control methods. For each control method, the effects of an outdoor temperature, indoor temperature sensing position and the capacities of the boilers and circulating pumps on the heating performance and energy consumption are obtained and "the best" control method is recommended.commended.

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Applications of Ground-Based Remote Sensing for Precision Agriculture

  • Hong Soon-Dal;Schepers James S.
    • Proceedings of the Korean Society of Crop Science Conference
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    • 2005.08a
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    • pp.100-113
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    • 2005
  • Leaf color and plant vigor are key indicators of crop health. These visual plant attributes are frequently used by greenhouse managers, producers, and consultants to make water, nutrient, and disease management decisions. Remote sensing techniques can quickly quantify soil and plant attributes, but it requires humans to translate such data into meaningful information. Over time, scientists have used reflectance data from individual wavebands to develop a series of indices that attempt to quantify things like soil organic matter content, leaf chlorophyll concentration, leaf area index, vegetative cover, amount of living biomass, and grain yield. The recent introduction of active sensors that function independent of natural light has greatly expanded the capabilities of scientists and managers to obtain useful information. Characteristics and limitations of active sensors need to be understood to optimize their use for making improved management decisions. Pot experiments involving sand culture were conducted in 2003 and 2004 in a green house to evaluate corn and red pepper biomass. The rNDVI, gNDVI and aNDVI by ground-based remote sensors were used for evaluation of corn and red pepper biomass. The result obtained from the case study was shown that ground remote sensing as a non-destructive real-time assessment of plant nitrogen status was thought to be a useful tool for in season crop nitrogen management providing both spatial and temporal information.

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Hallym Jikimi: A Remote Monitoring System for Daily Activities of Elders Living Alone (한림 지킴이: 독거노인 일상 활동 원격 모니터링 시스템)

  • Lee, Seon-Woo;Kim, Yong-Joong;Lee, Gi-Sup;Kim, Byung-Jung
    • Journal of KIISE:Computing Practices and Letters
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    • v.15 no.4
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    • pp.244-254
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    • 2009
  • This paper describes a remote system to monitor the circadian behavioral patterns of elders who live alone. The proposed system was designed and implemented to provide more conveniently and reliably the required functionalities of a remote monitoring system for elders based on the development of first phase prototype[2]. The developed system is composed of an in-house sensing system and a server system. The in-house sensing system is a set of wireless sensor nodes which have pyroelectric infrared (PIR) sensor to detect a motion of elder. Each sensing node sends its detection signal to a home gateway via wireless link. The home gateway stores the received signals into a remote database. The server system is composed of a database server and a web server, which provides web-based monitoring system to caregivers (friends, family and social workers) for more cost effective intelligent care service. The improved second phase system can provide 'automatic diagnosis', 'going out detection', and enhanced user interface functionalities. We have evaluated the first and second phase monitoring systems from real field experiments of 3/4 months continuous operation with installation of 9/15 elders' houses, respectively. The experimental results show the promising possibilities to estimate the behavioral patterns and the current status of elder even though the simplicity of sensing capability.

Review of Metal Oxide-based Formaldehyde Gas Sensor to Measure Indoor Air Quality (실내 대기질 진단을 위한 금속산화물 기반 폼알데하이드 가스센서 연구 동향)

  • Kim, Yoon Hwa;Koo, Won-Tae;Jang, Ji-Soo;Kim, Il-Doo
    • Journal of Sensor Science and Technology
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    • v.28 no.6
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    • pp.377-384
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    • 2019
  • People currently spend more than 80% of their time indoors; therefore, the management of indoor air quality has become an important issue. The contamination of indoor air can cause sick house syndrome and various environmental diseases such as atopy and nephropathy. Formaldehyde gas, which is the main contaminant of indoor air, is lethal even with microscopic exposure; however, it is commonly used as an adhesive and waterproofing agent for indoor building materials. Therefore, there is a need for a gas sensor capable of detecting trace amounts of formaldehyde gas. In this review, we summarize recent studies on metal oxide-based semiconductor gas sensors for formaldehyde gas detection, methods to improve the gas-sensing properties of metal oxides of various dimensions, and the effects of catalysts for the detection of parts-per-billion level gases. Through this, we discuss the necessary characteristics of the metal oxidebased semiconductors for gas sensors for the development of next-generation sensors.