• The Journal of Information Technology
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• v.12 no.3
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• pp.49-57
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• 2009

This Paper provides perceptual metrics for video quality based on properties of human visual system, and audio quality based on human audition. All metrics work without reference signals, allowing non-intrusive, in-service measurements. A simple and easy-to-learn user interface displays the metrics and saves them in popular file formats like CSV. In this paper, proposed method was able to various and corrective measurement for the multimedia service video quality. As that it was able to application to set up service guide line and the methode of measurement and system for the set up standardization of the high quality video service.

• KSCI Review
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• v.15 no.1
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• pp.103-109
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• 2007

선진각국에서 고령화 문제를 해결하기 위하여 고령친화 산업과 관련된 많은 연구들이 진행되고 있다. 본 논문에서는 노인 요양 또는 복지 시설 내 노인들의 거주 환경 변화 및 거주자의 활동 양상을 측정하는 유비쿼터스 노인케어 시스템 knu-SCS(KangNam Ubiquitous Senior Care System)에 대하여 연구하였다. knu-SCS 시스템은 조도, 습도, 온도 센서, 카메라 등으로 구성되며, 각종 센서들이 감지한 데이터를 저장, 가공, 분석하여 데이터베이스에 저장을 하고 저장된 데이터들을 사용자들에게 시각적으로 제시하기 위하여 센서 웹을 구현하였다. 센서 웹에서 제공하는 데이터들은 일상적인 노인 행동 및 생활환경을 인지할 수 있는 자료가 되므로, 이를 기초로 노인들이 겪을 수 있는 건강상 문제, 갑작스런 생활의 변화감지, 일상생활의 불편함을 해소하는 등 노인케어에 효과적으로 활용될 수 있다.

• Proceedings of the Korea Water Resources Association Conference
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• 2016.05a
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• pp.255-255
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• 2016

현재 하천유량은 제정된 관행 및 허가 수리권에 따라 사용자에게 물 분배가 이루어진 후 측정된 유량값이다. 이에 따라 현재 국내 하천 및 저수지 운영 모델로 적용중인 수리권에 기초를 둔 WRAP(Water Rights Analysis Package) 모델에 적용하기 위해서는 입력값인 자연하천유량 즉 인간의 물 사용 활동인 수리권이고려되지 않은 자연하천유량값의 산정이 필요하다. 이에 따라 본 연구에서는 국가 수자원 종합 정보시스템(WAMIS, Water Management Information System)자료 및 수문조사연보의 자료를 이용하여 한강유역 원통 지역에서의 2006년부터 2013년까지 8년간의 수위, 수위-유량곡선을 수집하여 이를 바탕으로 각해의 공식을 일원화하여 통합한 공식을 만들었으며 이를 통하여 자연하천유량 값을 산정하는데 사용하였다.

• Korean journal of communication and information
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• v.74
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• pp.72-108
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• 2015

The more mobile technology evolves, the more users are trapped in mobile technology by being encouraging the replacement with state-of-the-art technology. However, the use of device is not entirely determined by technology's attributes itself. The meaning of smartness can be varied by 'how users accept and perceive immediate spatial perception from reality to mobile space' without recognizing the boundaries between them. This study focuses on the analysis of 'smart usage' for smartphone and this is verified the concept of 'smart usage' by the second-order measurement model. The result show that the concept organization of 'smart usage' had been differentiated and elicited by the six factors - 'multifunctional use readiness', 'administrative efficiency', 'embedded media', 'device connectivity', 'user-friendly optimization', and 'external connectivity(being connected). According to the conceptual factors, 'smart usage' can be explained in an individual's autonomous ability to control a mobile interface and to utilize a wide range of applications of smartphones.

• Journal of the Korean Society for information Management
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• v.20 no.1
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• pp.417-455
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• 2003

Ontologies are formal theories that are suitable for implementing the semantic web. which is a new technology that attempts to achieve effective retrieval, integration, and reuse of web resources. Ontologies provide a way of sharing and reusing knowledge among people and heterogeneous applications systems. The role of ontologies is that of making explicit specified conceptualizations. In this context, domain and generic ontologies can be shared, reused, and integrated in the analysis and design stage of information and knowledge systems. This study aims to design an ontology for international organizations. and build an Internet web retrieval system based on the proposed ontology. and finally conduct an experiment to compare the system performance of the proposed system with that of internet search engines focusing relevance and searching time. This study found that average relevance of ontology-based searching and Internet search engines are 4.53 and 2.51, and average searching time of ontology-based searching and Internet search engines are 1.96 minutes and 4.74 minutes.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.20 no.3
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• pp.49-55
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• 2019

An open office or a shared office is emerging as the emphasis on the collaborative and communicative work environments is increasing. In the past, the user maintained the space, but the maintenance of indoor space became difficult because there is no fixed user. Indoor space information can be collected using the ICBM framework system. The facility management can achieve this with data. Therefore, this study proposed a framework based on ICBM (Internet of Things, Cloud, Big Data, and Mobile) for verifying the possibility of a smart facility management system for indoor space. IoT (Internet of Things) technology was used to measure the indoor temperature, humidity, occupancy, and brightness continuously, and provided the data to Web API via WiFi. Data acquired automatically via IoT, existing maintenance data, and spatial information were integrated through the Cloud. Big data collected by sensors were processed as meaningful spatial information for maintenance. Indoor space information and maintenance information can be delivered to the manager through the mobile. Based on the collected data, room occupancy recognition is limited due to a range of ultrasonic wave sensors. On the other hand, brightness represents the space conditions. The difference between lighting on/off, weekday and weekend can be shown. The temperature data and the relative humidity data were collected steadily to evaluate the comfort.

• Korean Journal of Construction Engineering and Management
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• v.17 no.3
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• pp.90-97
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• 2016

Since Korean construction firms have steadily advanced into the international market, small and medium construction companies (SMCCs) have also advanced in such market. SMCCs's recent trend have clearly shown the changes of contract types from single subcontractor projects to multiple general contracting projects. However, among those multiple projects performed by SMCCs, 1 out of 3 projects were deficit projects that impact the overall pe rformance of the firm. To increase such performance, risk management for in international construction must be managed at the enterprise level for SMCCs. This research aims to create a multiple project management model for SMCCS that employs the concept of acceptable risk to assess the limit risk level for corporation to acceptable. Using the accumulated data from previous survey and International Construction Association of Korea (ICAK), integrated risk of each firm and their profitability of each project are analyzed. Through the analysis, each firm's acceptable risk level is derived. Through the two research steps, acceptable risk algorithm was developed based on corporate integrated risk and profit correlation. To prove the acceptable algorithm relevance, financial statement analysis of 3 corporation was derived that level of acceptable risk and financial statement were available. Through the approach, this research allows the firms to analyze the firm's capability and find projects that suits the firm's situation and capability.

• Journal of Korea Society of Industrial Information Systems
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• v.29 no.1
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• pp.77-89
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• 2024

This paper presents an unmanned store management system that can provide inventory management and theft prevention for displayed products using a small camera that can monitor the shelves of sold products in small and medium-sized stores. This system is a service solution that integrates object recognition, real-time communication, security management, access management, and mobile authentication. The proposed system uses a custom YOLOv5-x model to recognize objects on the display, measure quantities in real time, and support real-time data communication with servers through Raspberry Pie. In addition, the number of objects in the database and the object recognition results are compared to detect suspected theft situations and provide burial images at the time of theft. The proposed unmanned store solution is expected to improve the efficiency of small and medium-sized unmanned store operations and contribute to responding to theft.

• Journal of Korea Society of Industrial Information Systems
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• v.10 no.2
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• pp.87-101
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• 2005

Many studies on the SCM related topics have been carried out during the last decade. However, most of research focused on identifying critical success factors of SCM with collaborations between partners. There have been a need for the integrated SCM success model and for identifying indicators of SCM performance measurement. In this study, we suggest the SCM success model classifying 5 aspects with key indicators for measurement. The suggested model can be applied to the measurement of SCM success.

• The Journal of Information Systems
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• v.17 no.1
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• pp.113-130
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• 2008

현대의 기업조직들은 역동적 경영환경변화에 직면하고 있다. 이러한 변화에 적응하기 위한 수단으로서, 많은 기업들이 정보기술의 도입을 적극적으로 고려하고 있다. 1990년대 중반에 등장한 ERP(Enterprise Resource Planning: 전사적 자원관리)는 이러한 정보기술의 대표적인 것으로 통합된 데이터베이스에 기초하여 기업의 연계된 업무기능을 지원하는 시스템이다. ERP시스템은 효용 및 효과 대비면에서 많은 장점을 가지고 있기 때문에 현재 우리나라의 많은 기업들이 ERP시스템을 도입하고 있다. ERP에 대한 기존의 연구들은 주로 ERP 도입 성공요소에 관한 내용이 주류를 이룬다. 그러나 이러한 주요성공요소들은 주로 시스템 개발과정의 특성만을 포함하곤 주요성공요소를 몇 개의 범주로 묶어 제시하는데 그 초점을 두고 있기 때문에, 이들 주요성공요소 간에 존재하는 상호영향관계를 충분히 반영하지 못하고 있는 실정이다. 이에 본 연구의 목적은 ERP CSF(Critical Success Factor : 주요성공요소)간에 존재하는 상호영향관계, 그리고 그러한 영향관계가 전체 ERP 성과에 어떤 효과를 가져다 주는가에 대한 총체적인 상호작용에 관한 연구가 부족하기 때문에, 이를 분석하고자 했다. 이 연구의 결과는 다음과 같다. ERP 주요성공요소 간에 존재하는 복잡한 상호영향관계를 실증분석을 통하여 측정하여 이들 간에 상호영향관계 및 선행관계가 있다는 것을 밝혀내었다. 다만, 일반적으로 BPR로 인하여 조직이 많이 변화하면 변화에 대한 사용자의 적응은 떨어질 것으로 생각되지만, 본 연구에서는 이들의 관계는 없는 것으로 밝혀졌다. 조직이 얼마나 많이 변화하였는가보다는 변화관리가 사용자가 적응하는데 더 많이 영향을 미친다고 나타나고 있다. 결국 BPR의 정도 또한 변화관리를 통해서는 사용자의 적응에 간접적으로 유의한 영향을 미치는 것으로 밝혀졌다.