• Journal of the Korea Society of Computer and Information
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• v.18 no.5
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• pp.103-111
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• 2013

This paper provide a framework for an IGILMS(internet-based global integrated logistics management system) which can access and mediate cargo transportations among small- and medium-sized domestic/international logistics corporations as regards cargo, registration and search for space, public tender and negotiation, contract, payment and safety-guarantee, transportation through the internet, wireless communication means, or smart phone etc. In addition, we describe a model to provide customized services in the B2B e-market for IGILMS and the structure and the control of its fulfillment process, and provide technical architecture of the IGILMS for an internet-based global logistics management system. To validate an efficiency of the proposed system, we develop a simulation model and analyze the performance of the proposed system.

• International conference on construction engineering and project management
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• 2024.07a
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• pp.1283-1283
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• 2024

Recently, construction sites have faced significant challenges due to arbitrary changes and poor communication between general contractors and subcontractors. This study proposes a technological solution by integrating Unmanned Ground Vehicles (UGVs) into the existing workflow of apartment construction. By analyzing current processes, we identified a scenario where UGVs, equipped with LiDAR (Light Detection and Ranging) systems, can generate and provide real-time 3D models of construction sites. These models can be linked with extended reality (XR) technology or office PCs for intuitive comparisons between digital and actual site conditions as a digital twin of the construction site. The study suggests an improved construction process that enhances contractors' understanding and on-site efficiency and enables managers to monitor progress effectively. To address challenging terrain on construction sites, a caterpillar driven UGV was developed, equipped with stereo cameras, a LiDAR sensor for scanning and gathering environmental data, and an embedded PC for data processing. Utilizing SLAM (Simultaneous Localization and Mapping) technology, the UGV autonomously navigates and scans the site at night, minimizing disruptions. Additionally, an embedded system analyzes images from stereo cameras to assess the quality of construction, mapping the findings onto 3D models. This innovation allows site managers to efficiently verify construction quality and identify issues without manual inspections, significantly improving site management efficiency.

• KSII Transactions on Internet and Information Systems (TIIS)
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• v.11 no.10
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• pp.4865-4886
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• 2017

The user experience of practical indoor power line communication (PLC) applications is greatly affected by the system quality-of-service (QoS) criteria. With a general broadcast-and-multi-access (BMA) relay scheme, in this work we investigate the joint source and relay power optimization of the amplify-and-forward (AF) relay systems used under indoor broad-band PLC environments. To achieve both time diversity and spatial diversity from the relay-involved PLC channel, which is time-varying in nature, the source node has been configured to transmit an identical message twice in the first and second signalling phase, respectively. The QoS constrained power allocation problem is not convex, which makes the global optimal solution is computationally intractable. To solve this problem, an alternating optimization (AO) method has been adopted and decomposes this problem into three convex/quasi-convex sub-problems. Simulation results show the fast convergence and short delay of the proposed algorithm under realistic relay-involved PLC channels. Compared with the two-hop and broadcast-and-forward (BF) relay systems, the proposed general relay system meets the same QoS requirement with less network power assumption.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.10 no.6
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• pp.1196-1200
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• 2009

This paper proposed a tunable band pass filter. It is two-poles direct capacitive coupled resonator band pass filter which the capacitors of parallel resonators are changed by varactor diodes. The DC bias controls to change the value of capacitance in the parallel resonator for tunning the pass band. To validate the proposed design method, we fabricated the band pass filter which has tunable center frequency from 200MHz to 245MHz.

• Proceedings of the Korean Society of Computer Information Conference
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• 2017.07a
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• pp.127-128
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• 2017

해마다 대포차로 인한 사건 사고가 많이 일어나고 있으며, 피해율이 점점 더 증가하는 시점에서 검거율은 현저히 낮다. 이러한 문제를 줄이기 위해 대포차 검거 애플리케이션을 개발하고자 한다. 본 연구는 GPS와 사진으로부터 텍스트를 추출하는 기능을 활용하여 대포차를 검거하는 데 도움을 주는 애플리케이션이다. 사용자가 정차 및 주차되어 있는 차의 번호판을 사진 촬영 기능을 활용하여 자동으로 사진을 분석을 통해 차량의 번호를 인식하고, GPS를 활용하여 촬영한 장소의 위치 값을 추출하고 대포차 여부를 확인한다. 촬영한 차량이 대포차로 식별되면 관리 서버에 등록되고 대응 절차에 의해 대포차 검거 절차를 진행한다. 대포차의 실시간 검거를 위해 대포차 대응서버에서는 관리자에게 실시간으로 정보를 전송하고 알림 기능을 통해 검거 절차가 진행된다. 또한 실시간 대응에 어려움이 있는 상황에서는 자주 신고가 접수되는 출몰지역 정보를 관리자가 유추할 수 있도록 통계정보를 제공하여 추후 잠복에 의한 검거 정보를 제공한다.

• Proceedings of the Korean Society of Computer Information Conference
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• 2015.07a
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• pp.79-80
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• 2015

본 프로젝트는 신입생들을 대상으로 대학캠퍼스 및 대학생활을 빠르게 적응할 수 있도록 시설물의 위치 및 활용방법, 학사 행정, 수강 및 강의실 등 학교생활에 유용한 정보들을 자연스럽게 전달할 수 있는 오락용 어플리케이션이다. 빠른 학교생활적응과 부가적이고 적절한 유용 정보를 제공하기 위해 미션을 해결하면서 목적을 달성하는 시나리오로 최종 미션을 완성할 수 있도록 구성하였다. 기술적으로는 QR코드를 활용한 정보 및 미션을 제공하고 GPS 위치 정보를 활용한 자신의 위치와 캠퍼스 맵, 미션 힌트 정보를 제공한다. 이러한 미션 수행 과정을 통해 대학생활에 유용한 정보를 얻을 수 있는 오락용 프로젝트이다.

• Journal of Korean Academy of Nursing
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• v.49 no.1
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• pp.1-13
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• 2019

Purpose: The purpose of this study was to develop and validate the Communication Behavior Scale for nurses caring for people with Dementia (CBS-D). Methods: Based on communication accommodation theory, the initial items were generated through a literature review and interviews with 20 experts. Content and face validity of the initial items were assessed. Data from 486 nurses caring for people with dementia were analyzed using item analysis, exploratory and confirmatory factor analysis, criterion-related validity, and internal consistency. Results: The final scale consisted of 18 items and four factors (discourse response management, interpersonal control, emotional expression, and interpretability) that explained 57.6% of the variance. Confirmatory factor analysis indicated that the theoretical model with 18 items satisfied all goodness-of-fit parameters. Criterion-related validity was shown by the Global Interpersonal Communication Competence Scale (r=.506, p<.001). Cronbach's alpha for the total scale was .88. Conclusion: The CBS-D can be used to measure the communication behavior of nurses caring for people with dementia.

• Journal of Wellbeing Management and Applied Psychology
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• v.3 no.4
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• pp.5-10
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• 2020

Purpose: This study aims to explore the experience of cross-cultural communication adaptation between local and expatriate employees at PT. XX Organizational culture in the company is the most important factor to helpemployees in the company to work efficiently and effectively in order to achieve company goals. Research design, data and methodology: The analysis methods used in this research are data reduction, data presentation, and drawing a conclusion. From this collaboration, the cultural adaptations arouse due to the challenges for workers who have to work together with different cultural backgrounds. The method used is qualitative with a case study approach. Data collection methods used is employee interviews at PT. XX with triangulation conducted on 2 expatriates and 2 local employees. Results: Studies show that successful management is highly dependent on employees adapting to local culture and work situations. This process rarely runs smoothly because the persons in intercultural interaction do not use the same language and the lack of adaptation.. Conclusions: . In order to maintain its existence, the company strives to expand its wings in the global market and establish partnerships to expand cooperation. PT. XX from South Korea cooperated with Krakatau Steel, a state-owned Indonesian company

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.16 no.4
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• pp.181-187
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• 2016

In this paper, we develop the Women's Information and Communications Technology Development Index (WIDI) framework for the Association of Southeast Asian Nations (ASEAN) Member States. While there are a number of global ICT indices, there are no standard global data metrics for ICT gender-related statistics in developing countries. Therefore, this research has been conducted by the Asia Pacific Women's Information. This study referenced some of the major global ICT indices and created a framework that used their basic structure and included the various measurement factors such as socio-cultural factors element and ICT policy for woman. The WIDI framework is supported by a back-end survey that was designed by the research team and reviewed by ASEAN taskforce members. Through WIDI, we can compare ICT development status and gender information gap and measure the national information gap. By presenting the basis for policy decisions on eliminating gender disparitie can help improve the social status of women.

• The Journal of the Korea institute of electronic communication sciences
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• v.9 no.2
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• pp.195-202
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• 2014

The Global Positioning System (GPS), which has various military and commercial applications, is designed to estimate the location of the specific user or object. In order to accurately estimate the location, GPS requires at least four satellite signals. The GPS receiver operates on extremely low signal-to-noise ratio (SNR) environment and it may suffer from various interference signals with the extremely high power. In this paper, we introduce a blind adaptive receiver based on the modified despreader, which suppress interference signals and detect GPS signals of interest without requiring explicit angle-of-arrival (AOA) information. We, also, provide the mathematical analysis for the signal-to-interference and noise ratio (SINR) of the modified despeader beamformer output. A representative computer simulation example is presented to illustrate the interference suppression performance of the considered GPS receiver and mathematical analysis of the SINR.