• 한국산학기술학회논문지
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• 제10권8호
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• pp.2117-2125
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• 2009

본 논문은 환경오염방지 및 처리에 관한 설비 등 환경기초시설에서 운영 적정성에 대한 정보화 시스템 즉, 환경기초시설 통합관리 시스템 개발에 관한 것이다. 이것을 개발하여 오염 원인물질의 생성부터 오염방지처리, 소멸에 이르기까지 전 과정(Life Cycle)에 대한 환경성 개선과 효과의 극대화를 이룬다. 이를 위해서 환경에너지시설의 환경경영 국제표준인 ISO14001 기반의 소각시설 정보화 시스템인 환경기초시설의 운영을 위한 유비쿼터스 전과정 평가시스템(u-LCA: Ubiquitous Life Cycle Assessment)을 개발하였다. 개발된 시스템은 현재 고양시 소각장에 적용하여 시범 운영 중이다. 이로 인하여 관리자들은 실시간으로 소각로의 운영 실태를 확인하고 문제점들을 즉시 개선할 수 있다.

• 한국HCI학회:학술대회논문집
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• 한국HCI학회 2008년도 학술대회 2부
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• pp.424-429
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• 2008

본 연구의 목적은 사용자 행태에 따른 기기 사용과 니즈에 대한 리서치를 진행한 후 사용자에게 필요한 기능과 요소를 도출하여, 경쟁력 있는 디자인을 제안하는 것이다. 이에 따라 합리적 개인주의의 성향을 가진 20~30대의 유저를 대상으로, 비즈니스 업무 시 홈에서든 직장에서든 공간에 구애 받기 않고 사용할 수 있는 스마트한 문서 편집 기기 디자인을 목표로 하여 연구를 진행하였다. 본 연구 방법으로 첫째, 타켓 유저를 선정하고 그들에 대한 충분한 이해를 위해 사용자 인터뷰를 바탕으로 하는 리서치를 수행하였다. 둘째, 리서치를 바탕으로 타켓 유저를 결정한 다음 퍼소나를 설정하여 문제점에 따른 니즈를 도출하였다. 셋째, 도출된 컨셉으로 디자인 형태를 구성하고 디자인 시각화 작업을 실행하였다. 더불어 시나리오를 기반으로 인터랙션 디자인을 전개하였다. 넷째, 프로토타입을 제작하여 사용자 평가를 실시하였다. 그 결과 입력, 편집, 출력을 번거로운 절차 없이 효율적으로 작업할 수 있고, 합리적 개인주의 성향에 맞추어 이동성과 간편성을 강조한 디자인을 완성하였다. 또한 사용성 평가를 통해 디자인의 타당성을 입증할 수 있었다.

• 대한지역사회영양학회지
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• 제22권3호
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• pp.207-217
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• 2017

Objectives: The aim of this study was to examine self-management status, nutritional knowledge, barrier factors in dietary management and needs of nutritional management program for women with Gestational Diabetes Mellitus (GDM). Methods: A total of 100 women with GDM were recruited from secondary and tertiary hospitals in Seoul. The questionnaire composed of general characteristics, status of self-management, dietary habits, nutrition knowledge, barrier factors in dietary management, needs for nutrition information contents and nutritional management programs. Data were collected by a self-administered questionnaire. All data were statistically analyzed using student's t-test and chi-square test using SAS 9.3. Results: About 35% of the subjects reported that they practiced medical nutrition and exercise therapy for GDM control. The main sources of nutrition information were 'internet (50.0%)' and 'expert advice (45.0%)'. More than 70% of the subjects experienced nutrition education. The mean score of nutrition knowledge was 7.5 point out of 10, and only about half of the subjects were reported to be correctly aware of some questions such as 'the cause of ketosis', 'the goal of nutrition management for GDM', 'the importance of sugar restriction on breakfast'. The major obstructive factors in dietary management were 'eating more than planned when dining out', 'finding the appropriate menu when dining out'. The preferred nutrition information contents in developing management program were 'nutritional information of food', 'recommended food by major nutrients', 'the relationship between blood glucose and food', 'tips on menu selection at eating out'. The subjects reported that they need management program such as 'example of menu by calorie prescription', 'recommended weight gain guide', 'meal recording and dietary assessment', 'expert recommendation', 'sharing know-how'. Conclusions: Based on the results of this study, it is necessary to develop a program that provide personalized information by identifying the individual characteristics of the subjects and expert feedback function through various information and nutrition information contents that can be used in real life.

• 한국컴퓨터정보학회논문지
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• 제17권6호
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• pp.119-130
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• 2012

본 논문에서는 수목관리의 효율성을 극대화하고자 객체지향 설계 모델링을 이용한 GIS 및 스마트폰 기반의 유비쿼터스 수목관리 시스템을 제안한다. 이를 위해 제안하는 시스템은 클라이언트/서버(C/S) 형태로 구현한다. 클라이언트에 해당하는 현장용 수목관리 시스템은 모바일(PDA, 스마트폰)기반으로 구성하고 서버에 해당하는 PC기반 수목관리 시스템은 GIS를 활용한다. 또한 C/S 간의 수목 데이터 통신을 위해 기존 연구에서 활용된 CDMA방식이 아닌 Web Service방식을 활용한다. 그리고 기존 연구의 문제점인 과도한 시스템 유지보수 비용과 다양한 사용자의 접근성 부족, 지리정보 시스템과의 연계 부족 현상을 본 논문에서 제안하는 시스템 개발 방식과 GIS 시스템, 스마트기기의 접목을 통해 해결한다. 이를 위해 본 논문에서는 시스템 단위테스트와 정성적인 평가를 통하여 기존 수목관리 시스템의 해결방안을 평가함으로써 제안하는 시스템의 효율성 및 확장성에서 우수함을 보인다.

• 한국경영과학회지
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• 제37권3호
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• pp.57-68
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• 2012

The recent proliferation of various smart devices like the smartphone, tablet PC, and smart TV enables consumers to download various applications from the network and to access private files stored in their desktop server at any time and at any place. The trend of ubiquitous access seems to have become stronger and more diversified toward a ubiquitous network computing environment with the aggressive deployment of commercial cloud services. Recently, many Korean network service providers launched commercial B2C public cloud services, which were widely adopted by smart device users. They include Daum cloud, N drive, ucloud, and uplus box, mostly provided by major Korean telecom companies and portals. This paper aims to explore consumers' adoption behaviors toward the B2C public cloud services that were recently deployed in the Korean market. In order to achieve the goal, we identified key influencing factors that affect the consumers' adoption behaviors, based on an extension of the technology acceptance model (TAM). Several hundred smart device users were surveyed to test the generic regression model with the extended set of TAM variables.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제3권3호
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• pp.219-234
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• 2009

This paper presents a novel approach for extracting simultaneously human daily activity patterns and discovering the temporal relations of these activity patterns. It is necessary to resolve the services conflict and to satisfy a user who wants to use multiple services. To extract the simultaneous activity patterns, context has been collected from physical sensors and electronic devices. In addition, a context model is organized by the proposed incremental statistical method to determine conflicts and to infer user intentions through analyzing the daily human activity patterns. The context model is represented by the sets of the simultaneous activity patterns and the temporal relations between the sets. To evaluate the method, experiments are carried out on a test-bed called the Ubiquitous Smart Space. Furthermore, the user-intention simulator based on the simultaneous activity patterns and the temporal relations from the results of the inferred intention is demonstrated.

• 전자공학회논문지CI
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• 제45권6호
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• pp.60-67
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• 2008

RFID 시스템은 현재 다양한 분야에서 사용되어 지고 있는 바코드 인식 시스템이나 자기 인식 장치들이 근본적으로 내재하고 있는 실용성 및 보안성 문제점들을 보완할 수 있는 대체 시스템으로 각광받고 있다. 특히 RFID 시스템은 교통카드, 출입구 보안 및 출결 카드 분야를 포함한 상거래와 직접적인 관련이 있는 물류관리, 재고관리, 항만관리, 동물관리 등 물류 및 유통 분야에서도 빠르게 응용 및 확산되어 사용되어 지고 있다. 본 논문에서는 유비쿼터스 컴퓨팅의 한 예로서 RFID시스템을 TCP/IP를 이용하여 네트워크화하여 구성한 안전하고 효율적인 원격 출입 제어 시스템을 제안한다. 먼저 원격 출입 제어에 적합한 인증 프로토콜을 제안하며, 제안한 인증 프로토클 기반의 원격 보안 출입 제어 시스템이 원활한 자동문 제어가 가능함을 임베디드 시스템과 TCP/IP 기반의 RFID 시스템으로 구성된 자동문 세트를 활용한 모의실험을 통해 실용성을 증명한다.

• International Journal of Advanced Culture Technology
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• 제2권2호
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• pp.1-6
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• 2014

In this paper, we propose an intelligent streetlight system that has a complex sensor module of temperature, humidity, luminance and motion detection and controlled by the fuzzy logic based central monitoring system in order to get flexible and precise manipulation of the streetlight system in USN environment. The proposed streetlight system provides low power consumption and high efficiency by using sensed data from the complex sensor module, which were collected, processed, and analyzed by the fuzzy logic based central monitoring system. The performance of the proposed streetlight system is to be evaluated by a simulation study in terms of power savings and safety at the fields constructed as a test-bed under several suggested scenarios. Finally, we know that the proposed intelligent streetlight system can maximize the energy savings efficiently with the fuzzy logic based central monitoring system and selective remote dimming control by connecting it to the wireless ubiquitous sensor network (USN) using a Zigbee module.

• 대기
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• 제20권2호
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• pp.153-160
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• 2010

In this paper, an attempt has been made to build and test self-configuring weather sensor networks and internet based observation system to gather atmospheric data. The aim is to provide integrated or real-time weather information in standard form using network data access protocol. This system was successfully developed to record weather information both digital as well as visual using sensor network and web-enabled surveillance cameras. These data were transformed by network based data access protocol to access and utilize for public domain. The competed system has been successfully utilized to monitor different types of weather. The results show that this is one of the most useful weather monitoring system.

• 한국정보통신설비학회:학술대회논문집
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• 한국정보통신설비학회 2007년도 학술대회
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• pp.181-184
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• 2007

Up to now, a lot of houses, roads and other urban facilities have been damaged by natural disasters such as flash floods and landslides. It is reported that the size and frequency of disasters are growing greatly due to global warming. In order to mitigate such disaster, flood forecasting and alerting systems have been developed for the Han river, Geum river, Nak-dong river and Young-san river. These systems, however, do not help small municipal departments cope with the threat of flood. In this study, a real-time urban flood forecasting service (U-FFS) is developed for ubiquitous computing city which includes small river basins. A test bed is deployed at Tan-cheon in Gyeonggido to verify U-FFS. Wireless sensors such as rainfall gauge and water lever gauge are installed to develop hydrologic forecasting model and CCTV camera systems are also incorporated to capture high definition images of river basins. U-FFS is based on the ANFIS (Adaptive Neuro-Fuzzy Inference System) that is data-driven model and is characterized by its accuracy and adaptability. It is found that U-FFS can forecast the water level of outlet of river basin and provide real-time data through internet during heavy rain. It is revealed that U-FFS can predict the water level of 30 minutes and 1 hour later very accurately. Unlike other hydrologic forecasting model, this newly developed U-FFS has advantages such as its applicability and feasibility. Furthermore, it is expected that U-FFS presented in this study can be applied to ubiquitous computing city (U-City) and/or other cities which have suffered from flood damage for a long time.