• 융합정보논문지
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• 제10권8호
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• pp.53-59
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• 2020

본 논문은 음원 탐지 및 음원 위치를 추정하는 IoT Device 시스템에 관한 것으로, 보다 구체적으로는 복수의 마이크로폰 센서로부터 수집된 음원 신호의 도달 시간차를 분석하여 음원의 방향을 정확히 검출하고, IoT 센서를 이용하여 음원의 발생방향을 추적할 수 있는 음원 방향 탐지 Device를 이용한 시스템이다. 음파를 이용하여 위치를 추정하는 기술은 예전부터 군사적 목적으로 개발되어 왔지만 현재는 이를 응용하여 방범·방재 분야 등에 많이 쓰이고 있다. 이에 따라 본 시스템의 제작을 통해 옥외에 설치한 후 여러 방향에서 음원 발생시켜 성능 시험을 실시하였다. 그 결과 음향 탐지 영역 140dB, 반응시간 1초 이내, 방향 각도 분해능 1° 이내로 매우 정확하게 동작함을 확인할 수 있었다. 향후에는 본 설계안을 바탕으로 빅데이터 분석을 통한 인공지능 알고리즘을 반영하여 보다 신뢰성을 향상시켜 상용화할 계획에 있다.

• 한국컴퓨터정보학회논문지
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• 제25권12호
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• pp.119-126
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• 2020

본 논문에서는 BLE 비콘을 기반으로 하는 제품 정보 안내 시스템을 설계하고 구현한다. 이 시스템은 모바일 티켓을 통한 비접촉 입장 서비스, 좌석 안내 서비스, 이벤트 Push 서비스, 콘텐츠 Push 서비스, 공공 서비스 등의 다양한 기능을 제공하도록 설계한다. 이 시스템은 3개 모듈인 비콘 인식 모듈, 서버 연동 모듈, 콘텐츠 전송 모듈로 구성된다. 비콘 인식 모듈은 스마트 폰을 가진 고객이 가용 서비스 영역에 접근하면 근접한 비콘의 특정 ID를 전송하는 기능을 구현한다. 서버 연동 모듈은 비콘 ID 값을 인식하여, 서버로 전달하고, ID를 가지고 있는 서버 위치를 확인하는 기능을 구현한다. 콘텐츠 전송 모듈은 해당 위치에 설정된 이벤트나 서비스 정보를 스마트 폰으로 전송하는 기능을 구현한다. 본 논문에서 구현한 비콘 기반의 제품 정보 안내 시스템을 활용하면 다양한 제품 정보 안내 시스템을 빠르고, 쉽게 구현할 수 있다는 장점이 있다.

• 한국정보기술응용학회:학술대회논문집
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• 한국정보기술응용학회 2005년도 6th 2005 International Conference on Computers, Communications and System
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• pp.65-68
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• 2005

In this paper, an algorithm to extract bar-space area is suggested. In a section of bar-code space area the threshold value is computed, and bar and space are extracted according to threshold value. PDF417 is used everyday life and printed in many different materials. The printed PDF417 is especially influenced by various light source. The decision of bar and space is very hard under the change of illumination. The fixed threshold value to distinguish the bar and space can not be applied. in these cases, The proposed algorithm is developed to investigate variable threshold. The variable threshold can be obtained by simple calculation.

• KIEAE Journal
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• 제7권4호
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• pp.75-80
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• 2007

The purpose of this study is to analyze architectural plans of lower part of super tall mixed-use residential building for understanding its functions for urban. The area of this research are limited to super tall mixed-use residential building which were built in Seoul, Kyoung-gi area, and new towns. For this purpose, theories for super tall mixed-use residential building and non-housing parts were researched, and characteristics of selected cases for field research were analyzed by studying drawing materials. The research focused on scale, type of building, included programs for public spaces, and characteristics of location. As a result, every cases were designed as 'outdoor transition zone-centered type', and for urban function, non-housing facilities were condensed to increase convenience. In addition, ratio of non-housing part were incresesed with public spaces design for residents, and various programs were inserted.

• 한국조경학회:학술대회논문집
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• 한국조경학회 2007년도 Journal of Landscape Architecture in Asia Vol.3
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• pp.145-150
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• 2007

Settings of traditional shrines and their Surroundings are seemed to be one of the typical life-cultural designs realized on land in urban or rural area in Japan. It can be said that those settings are some reflections of nature-oriented cosmology established in long term history of ordinary people. Examining those settings and making clear their characteristics could be a significant issue of landscape architecture for discussing sustainable ways of urbanism or regional development. In this paper, the author examined and discussed the shrine settings from a view point of their spatial relation with surrounding water system. Based on the surveys on more than 60 local shrines in northern area of Tokyo, it was revealed that many shrines have strong connections to surrounding waters or low lands with downward-oriented worshipping to nature instead of upward-oriented worshipping well known as general location of shrine. It is believed that the result shows the diversity of landscape settings of shrines as historical life-culture, and the varieties has to be conserved or restored in various ways of urban design or regional planning.

• 한국전통조경학회지
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• 제28권2호
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• pp.9-22
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• 2010

본 연구는 선조가 꾸민 전통조경공간 내에서 발견할 수 있는 특징적인 바위글씨인 동천(洞天)을 대상으로 하여 그곳에 담긴 의미는 무엇인지, 어떠한 목적으로 동천을 조영(造營)하였는지, 또한 조영함으로써 무엇을 나타내고자 하였는지를 밝히고자 하였다. 이를 위해 집중적인 연구대상지인 25개소의 동천을 선정하고 이곳에 대한 이해를 뒷받침해줄 수 있는 자료에 대한 문헌분석, 그리고 현지답사를 통해 동천의 경관과 유형을 살펴봄으로써 나타난 조영 특성은 다음과 같다. 첫째, 동천은 조성 목적에 따라 가거지형(家居地型), 은서지형(隱棲地型), 산수유람형(山水遊覽型)에서 승경형(勝景型)과 수신형(修身型), 수도지형(修道地型)으로 나눌 수 있었다. 즉, 동천은 우리의 생활하는 장소에서, 현실의 불합리나 재난을 피하기 위한 은서의 장소에서, 자연과의 화합에 의한 풍류생활의 장소에서, 그럼으로써 자신을 수양하려는 수신의 장소에서, 속세를 벗어난 수도의 장소에서 조영되어 있었다고 볼 수 있다. 둘째, 입지유형에 따라 심산동구형(深山同口型), 계류인접형(溪流隣接型)에서 연계형(連繫型)과 단일영역형(單一領域型), 평지형(平地型)으로 나눌 수 있었다. 특히 심산동구형은 무릉도원, 몽유도원, 오복동에서 보여주는 공간설정과 상당히 유사하게 전개되어 동천이라는 것이 선조가 사유했던 이상향의 공간구조임을 알려준다. 그렇지 않다면 우리나라의 계곡, 승경처에 동천이 조영되었는데, 이는 신선사상에서 말하는 선계의 모습을 원림에서 가꾸어 나감으로써 신선의 경지를 추구하고자 한 바램으로 파악된다. 셋째, 동천이라 명명함으로써 그곳은 이상향이 되며, 그 스스로 선경을 유발시키게 된다. 즉, 눈에 보이는 동천각자를 통해서 이면의 심층에 있는 이상향의 의미를 추구하려는 것이며, 공간을 만든 조영자가 추구했던 이상적 세계에 대한 갈망에 지극히 기여하는 요소가 되고 있다.

• 한국해양공학회지
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• 제15권3호
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• pp.120-127
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• 2001

The potential pollution problems resulting from tanker collision necessitate the requirement for an effective structural design and the development of relevant safety regulations. During a few decades, the great effort has been made by the international Maritime Organization and the Administration, etc, to reduce oil spillage from collision accidents. However there is still a need for investigation in the light of structural evaluation method for the experiments and rational analysis, and design development for an operational purpose of ships. This study aims for investigating a complicated structural response of bow structures of simplified models and oil carriers for assessing the energy dissipation and crushing mechanics of the striking vessels through a methodology of the numerical analysis for the various models and its design changes. Through these study an optimal bow construction absorbing great portion of kinetic energy at the least penetration depth prior to reach to the cargo area and an effective location of collision bulkhead are investigated. In order to obtain a rational results in this study, three stages of collision simulation procedures have been performed step by step as follows; 1) 16 simplified ship models are used to investigate the structural response against bow collision with variation of primary and secondary members. Mass and speed are also varied in four conditions. 2) 21 models consisted of 5 sizes of the full scaled oil carriers are used to perform the collision simulation with the various sizes and deadweight delivered in a recent which are complied with SOLAS and MARPOL. 3) 36 models of 100l oil carrier are used to investigate the structural response and its influence to the collision bulkhead against bow collision in variation with location of collision bulkhead, primary members, framing system and colliding conditions, etc. By the first study using simplified models the response of the bow collision is synthetically evaluated for the parameters influencing to the absorbed energy, penetration depth and impact force, etc.

• 한국해양공학회:학술대회논문집
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• 한국해양공학회 2001년도 춘계학술대회 논문집
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• pp.119-126
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• 2001

The potential pollution problems resulting from tanker collision necessitate the requirement for an effective structural design and the development of relevant safety regulation. During a few decades, the great effort has been made by International Maritime Organization and the Administration, etc, to reduce oil spillage from collision accidents. However there is still a need for investigation in the light of structural evaluation method for the experiments and rational analysis, and design development for an operational purpose of ships. This study is aimed at investigating a complicated structural response of bow structures of oil carriers for assessing the energy dissipation and crushing mechanics of striking vessel through a methodology of the numerical analysts for the various models and its design changes. Through this study an optimal bow construction absorbing great portion of kinetic energy in the least penetration depth prior to reach to the cargo area and an effective location of collision bulkhead are investigated. In order to obtain a rational results in this study, three stages of response analysis procedures are performed as follows; 1). 16 simplified ship models are used to investigate the structural response against bow collision with variation of primary and secondary members. Mass and speed are also varied in two conditions. 2). 21 models conisted of 5 size of full scaled oil carriers are used to perform the collision simulation with the various sizes and deadweight delivered in a recent which are complied with SOLAS and MARPOL. 3). 36 models of 100k oil carrier are used to investigate the structural response and its influence to the collision bulkhead against bow collision in variation with location of collision bulkhead, primary mombers, framing system and colliding conditions, etc.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제7권5호
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• pp.1014-1035
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• 2013

With recent advances in wireless communication and low-power miniaturized biomedical sensor and semiconductor technologies, wireless body area networks (WBAN) has become an integral part of the disaster aid system. Wearable vital sign sensors can track patients' status and location, thus enhancing disaster rescue efficiency. In the past few years, most of the literatures in the area of disaster aid system based on WBAN have focused on issues concerning wireless sensor design, sensor miniaturization, energy efficiency and communication protocols. In this paper, we will give an overview of disaster aid, discuss about the types of network communication as well as outline related issues. We will emphasize on analyzing six key issues in employing the disaster aid system. Finally, we will also highlight some of the challenges that still need to be addressed in the future in order to help the disaster aid system be truly and widely accepted by the public.

• 한국주거학회논문집
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• 제27권3호
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• pp.23-30
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• 2016

Among the unearthed House ruins in Gyeongju of the capital of Silla period, the ruins to see the overall appearance of building arrangement is the ruins of Silla capital S1E1 area, Inwangdong 412, and the Jaemaejeong. In this study, the characteristics of urban house arrangement of the Unified Silla period was analyzed that, through a review of the arrangement relationship between the gate and the individual buildings found in these ruins. The urban house of the Unified Silla period was surrounded with wall, and the way to distinguish between functional areas within it are shown differently, depending on the size of the house. In other words, the small house was divided each area by installation of inner fence, and the large house was by arranging attached buildings. Thai is, the central area is not divided by inner fence is the Characteristics that is different from the small house. And in all houses, a large courtyard is located in the front of main building. Conatruction of the courtyard determines the location and direction of the main building. And the each area has external space of courtyard in the center.