• Wind and Structures
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• 제20권4호
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• pp.489-508
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• 2015

In this paper, a novel methodology is proposed to obtain optimum location of outriggers. The method utilizes genetic algorithm (GA) for shape and size optimization of outrigger-braced tall structures. In spite of previous studies (simplified methods), current study is based on exact modeling of the structure in a computer program developed on Matlab in conjunction with OpenSees. In addition to that, exact wind loading distribution is calculated in accordance with ASCE 7-10. This is novel since in previous studies wind loading distributions were assumed to be uniform or triangular. Also, a new penalty coefficient is proposed which is suitable for optimization of tall buildings. Newly proposed penalty coefficient improves the performance of GA and results in a faster convergence. Optimum location and number of outriggers is investigated. Also, contribution of factors like central core and outrigger rigidity is assessed by analyzing several design examples. According to the results of analysis, exact wind load distribution and modeling of all structural elements, yields optimum designs which are in contrast of simplified methods results. For taller frames significant increase of wind pressure changes the optimum location of outriggers obtained by simplified methods. Ratio of optimum location to the height of the structure for minimizing weight and satisfying serviceability constraints is not a fixed value. Ratio highly depends on height of the structure, core and outriggers stiffness and lateral wind loading distribution.

• 한국공간정보시스템학회:학술대회논문집
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• 한국공간정보시스템학회 2005년도 GIS/RS 공동 춘계학술대회
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• pp.79-84
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• 2005

LBS 플랫폼은 이동통신망과 LBS 사이에서 필요한 기반 기술을 제공하기 위한 플랫폼으로서, 망과의 접속 및 위치 정보 서비스, 사용자 정보 서비스, 망 관리 등의 기술을 제공하는 LBS 포털 서버 기술, 다양한 LBS 응용 서비스를 지원하는 응용 서버 기술, 실시간 대용량 위치정보를 처리하는 위치데이터 서버 기술로 구분된다. 본 연구는 다양한 LBS 응용 어플리케이션을 개발하기 위한 응용서버기술로써 OpenLS Core Service 사양의 'Presentation Service', 'Location Utility Service', 'Directory Service'를 W3C 웹 서비스 표준을 준수하도록 구현하였다.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2002년도 춘계학술대회 논문집
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• pp.116-121
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• 2002

This primary study has some bounds md limits owing to the descriptive reviews but not detailed analyses. However, 1 tried to do the comparative analyses and case studies about location and size of rail station for future efficient use of spatial structure. Therefore, I reviewed the location of railway station and some design standards of railway station facilities by type (high speed rail, conventional rail and urban rail), and also, suggested future direction for rail station as the core of city development relating with urban structures and human settlement system reformation.

• 정보처리학회논문지D
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• 제11D권6호
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• pp.1247-1258
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• 2004

개인의 이동성을 중심으로 하는 LBS(Location-Based Services, 위치기반 서비스)는 이동통신 단말기의 진화 및 제반 인프라의 급속한 발전으로 인해 다양한 서비스의 요구가 증대되고 있다. 이러한 LBS를 가능하게 하는 기술은 크게 위치 측위 기술, 플랫폼 기술, 컨텐츠 처리 기술 및 이동체 DBMS 기술 등으로 구분된다. 이 중 플랫폼 기술은 위치제공 게이트웨이 서버와 연동하여, 과금, 인증. 위치 정보 보호, 위치 트리거, 지능형 위치획득 등의 일반적인 기능을 제공하는 역할을 수행한다. 국내 표준 단체에서는 위치 정보의 요청 및 제공을 위한 표준 인터페이스를 제공하고 있으며, 지리 정보의 대표적인 컨소시움인 OGC(Open GIS Consortium)의 OpenLS(Open Location Service)에서는 핵심 LBS를 제공하기 위한 표준 인터페이스를 정의하고 있다. 이 논문에서는 다양한 LBS를 제공하기 위하여 위치제공 게이트웨이 서버 및 컨텐츠 서버와 연동하는 서비스 플랫폼을 구현하였으며, 일반적인 플랫폼의 기능 이외에 다음과 같은 특징을 갖는다. 첫째, 서로 다른 위치제공 게이트웨이 서버에 대하여 동일한 인터페이스를 이용하여 위치 정보를 요청, 제공 할 수 있다. 둘째, OpenLS에서 제공하고 있는 4가지 핵심 컨텐츠 서버와 표준화된 방법으로 연동할 수 있다. 셋째, 기존의 무선 단말의 위치뿐만 아니라 유선 전화의 위치 또한 표준 인터페이스를 이용하여 제공할 수 있다. 넷째, 현재 위치에 대한 정보뿐만 아니라, 이동체 서버와 연동하므로 과거 이동 궤적에 대한 정보를 제공할 수 있다. 이 논문은 표준화된 방법을 이용하여 플랫폼의 구현 방법을 제시함으로써, LBS 시스템의 구축 및 활용에 크게 기여하였다.

• 디지털산업정보학회논문지
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• 제13권4호
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• pp.71-79
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• 2017

Recently, Fire watching and dangerous substances monitoring system has been being developed to enhance various fire related security. It is generally assumed that fire flame extraction plays a very important role on this monitoring system. In this study, we propose the fire flame extraction method of Non-Residential Facilities based on core object extraction in image. A core object is defined as a comparatively large object at center of the image. First of all, an input image and its decreased resolution image are segmented. Segmented regions are classified as the outer or the inner region. The outer region is adjacent to boundaries of the image and the rest is not. Then core object regions and core background regions are selected from the inner region and the outer region, respectively. Core object regions are the representative regions for the object and are selected by using the information about the region size and location. Each inner region is classified into foreground or background region by comparing its values of a color histogram intersection of the inner region against the core object region and the core background region. Finally, the extracted core object region is determined as fire flame object in the image. Through experiments, we find that to provide a basic measures can respond effectively and quickly to fire in non-residential facilities.

• 전기전자학회논문지
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• 제17권4호
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• pp.564-569
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• 2013

현재 임베디드 기기는 멀티코어로 급성장하고 있으며 빠른 부팅 속도를 요구하고 있다. 하지만 기존의 부팅 기술은 하나의 코어만을 사용하고 있다. 따라서 본 논문에서는 분석 도구를 통해 안드로이드 부트 프로세스를 분석후, CPU연산이 많은 곳에 병렬 기법을 적용하는 방법과 멀티 코어의 성능을 최대로 끌어내기 위해 CPU주파수 정책을 변경함으로써 멀티코어 기반에서 안드로이드 부팅 속도 향상 방법에 대해 제안한다. 본 논문의 제안 방법을 듀얼 코어 S5PV310과 쿼드 코어 Exynos4412에 각각 적용시킨 뒤 부팅 완료 시간을 측정하였으며 기존의 방법과 제안 방법의 시간을 비교한 결과 듀얼코어와 쿼드코어에서 각각 약 20.71%, 약 31.34%의 속도 성능향상을 가져왔다.

• Journal of Positioning, Navigation, and Timing
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• 제9권3호
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• pp.169-173
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• 2020

Location-based services are used as core services in various fields. In particular, in the field of public services such as emergency rescue, accurate location estimation technology is very important. Recently, the technology of tracking the location of self-isolation subjects for COVID-19 has become a major issue. Therefore, location estimation technology using personal smart devices is being studied in various ways, and the most widely used method is to use GPS. Other representative methods are using Wi-Fi, Pedestrian Dead Reckoning (PDR), Bluetooth Low Energy (BLE) beacons, and LTE signals. In this paper, we introduced a positioning technology using deep learning based on LTE Channel State Information-Reference Signal (CSI-RS) data, and confirmed the possibility through an outdoor location estimation experiment using a commercial LTE signal.

• 대한원격탐사학회지
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• 제11권2호
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• pp.29-42
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• 1995

A typhoon center location and its intensity from the 54.96GMz channel of Microwave Sounding Unit(MSU) on board the NOAA satellite is analyzed. NOAA satellite MSU channel 3 data may delineate the development and dissipation of the upper tropospheric warm core associated with a typhoon. The typhoon warm core is related to microwave imagery of 250hPa temperature field (54.96GMz). The typhoon center intensity, surface center pressure and maximum wind speed at the eye well, correlate to horozontal Laplacian of an upper tropospheric temperature field. The typhoon center is found from the analysis of 250hPa temperature field. The excellent correlation is found between the horizontal Laplacian of an tropospheric temperature field and surface maximum wind speed, another correlation is found between the warm temperature anomaly and surface pressure anomaly.

• 웰빙융합연구
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• 제5권1호
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• pp.31-35
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• 2022

Purpose: This study was conducted to investigate the effects of change in the unstable support surface location during bridge exercise on the muscle activity of erector spinae and gluteus maximus. Research design, data and methodology: 12 healthy participants aged 23.32 ±1.02 were measured muscle activities of erector spinae and gluteus maximus during bridge exercise and compared between the exercise conditions; unstable support surface located on upper back and feet during bridge exercise. Paired t-test was performed to identify whether there was a significant difference in the muscle activities between the exercise conditions. Results: As a result, even though higher levels of the averaged muscle activities of both erector spinae and gluteus maximus during exercise in unstable support surface located on feet than upper back were observed, no significant differences were found. Conclusions: The change of unstable support surface location during bridge exercise for low back pain rehabilitation would be more appropriate to be used to increase levels of tension of muscle activities and train fine motor control rather than to strengthening muscle strength.

• 한국작물학회:학술대회논문집
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• 한국작물학회 2022년도 추계학술대회
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• pp.265-265
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• 2022

Increased temperature caused by global warming has become a significant problem for the growth and production of crops. A high temperature has a direct or an indirect effect on crops, leading to a significant yield loss. The damage of a high temperature stress to rice depends on its developmental stage. In present study, we performed evaluate the heading date in different location, Yeoju and Miryang, during growth of Korean rice core set. The heading date for the 223 rice accession were evaluated in Yeoju City (37°23' 127°57') and Miryang City (35°50', 128°72') located on middle and southern part of Korea, respectively. The average temperature of a day was higher in Miryang during entire growth stage. Here, total 222 KRICE-Core set was analyzed by GWAS for the high temperature effect. GWAS results revealed the Chr07_26954556, a lead SNPs were significantly associated with delaying heading date of KRICE-Core set. Significance threshold was set with 6.0 > -log10(P), and Cross-Validation (CV) error suggested an optimal K value of 5 for the population based on the lowest cross-validation error K = 5.