• Journal of information and communication convergence engineering
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• 제11권3호
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• pp.216-222
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• 2013

It is known that blood circulation in human body causes the skin tone to change concurrently with heartbeats. A number of apps have been developed to measure the heartbeat using smartphone camera; however, no any further analysis is performed. In this paper we propose an algorithm that detects heartbeats from the phone's camera and further extracts the heart rate variability (HRV). We compare the HRV extracted from the camera with the HRV extracted from the electrocardiogram. We estimated a number of commonly used HRV characteristics and compared them. Our results show that smartphone camera leads to slightly overestimated characteristics although the difference in extracted HRV signals is negligible. As a consequence we suggest that a smartphone camera can be employed in a quick heart diagnosis and diagnosis of autonomic nervous system.

• 디지털융복합연구
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• 제9권6호
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• pp.113-123
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• 2011

본 논문의 목적은 북한을 개방으로 이끌기 위한 정보의 공개이다. 이와 더불어 정보통신을 세계 표준에 맞추어야 세계와 소통이 가능해진다. 북한은 폐쇄 국가이다 보니 독자적으로 표준화를 진행한 것이 많이 있다. 통일을 바라보고 남북의 표준화를 위해서 의사소통이 가능해야 한다. 그리고 가능한 많은 정보를 통하여 북한과 접근이 되어야 진정한 남북협력이라고 할 수 있다. 북한을 개방으로 이끌고 국제기구 (UN)의 일원으로 유도하려면 정보통신이 우선 공개되고 북한의 표준을 이해해야 한다. 그러므로 진정한 민족 통일이 되려면 최우선으로 선행되어야 하는 것은 상호간에 정보통신 표준화를 정책의 최우선과로 통합 했을 때 진정한 통일이 가능해 진다.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제11권6호
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• pp.3071-3085
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• 2017

Currently, various technological models and services are emerging because of the development of information and communication technology and the convergence of industries. The ICT car field is expanding because of technological convergence in the automobile industry. However, ICT convergence services are still being developed based solely on technology; characterization of users and their needs is lacking. Therefore, two types of ICT car services that apply human-centered design processes are developed in this study. These processes create services and models while considering the quality and functions of products based on users (instead of technology) when developing products or services. Usability evaluation was performed on the developed services; a human-centered design process was applied to the results to confirm that the derived services resulted in high satisfaction. In the future, these research results will provide useful applications when developing ICT car services and strategies.

• 한국정보전자통신기술학회논문지
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• 제17권1호
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• pp.53-58
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• 2024

본 연구는 우리나라에 출원된 인공지능 기술이 포함된 전자상거래 관련 특허의 기술 융복합 분석에 관한 것으로 사회 연결망 분석(Social Network Analysis)을 이용하여 핵심 기술간 관계를 분석하고 시각화하였다. 사회 연결망 분석을 실시한 결과 인공지능 기술이 포함된 전자상거래 관련 특허에서 상호 기술 네트워크를 구성하는 핵심 IPC 코드는 G06Q, G06F, G06N, G16H, G10L, H04N, G06T, A61B 등으로 조사되었다. 특히 [G06Q-G06F], [G06Q-G06N] 등 데이터 처리 관련 기술 융복합과 [G06Q-G10L], [G06Q-H04N], [G06Q-G06T] 등 음성과 이미지 신호가 중요하게 융합되어 있음을 확인할 수 있다. 본 연구 방법을 활용하면 전자상거래 관련 특허의 미래 기술 트렌드를 확인하고 새로운 비즈니스 모델을 창안할 수 있다.

• 한국정보기술학회 영문논문지
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• 제8권2호
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• pp.111-118
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• 2018

Information communication authority module software contains various functions and services. A software test is the only acceptance test step. Recently, however, all development steps have become important. In particular, the software acceptance step is very high, and a study of the effective use of limited time and resources on acceptance step is needed. This study examined the efficiency of the Test Design Technique for Software Test. The proposed Test Design process was applied to the domain systems of info-communication and the degree of improvement was measured. This paper establishes Software Test design process Infrastructure based on the developed software.

• Journal of information and communication convergence engineering
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• 제18권1호
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• pp.61-68
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• 2020

In the era of the fourth industrial revolution, many production plants are gradually evolving into smart factories that apply information and communication technology to manufacturing, distribution, production, and quality management. The conversion from conventional factories to smart factories has resulted in the automation of production sites using the internet and the internet of things (IoT) technology. Thus, labor-intensive production can easily collect necessary information. However, implementing a smart factory required a significant amount of time, effort, and money. In particular, labor-intensive production industries are not automated, and productivity is determined by human skill. A representative industry of such industries is sewing the industry. In the sewing industry, wherein productivity is determined by the operator's skills. This study suggests that production performance, inventory management and product delivery of the sewing industries can be managed efficiently with existing production method by using smart buttons incorporating IoT functions, without using automated machinery.

• Journal of information and communication convergence engineering
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• 제19권2호
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• pp.67-72
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• 2021

Wireless sensor networks (WSNs) require an enormous number of sensor nodes (SNs) to maintain processing, sensing, and communication capabilities for monitoring targeted sensing regions. SNs are generally operated by batteries and have a significantly restricted energy consumption; therefore, it is necessary to discover optimization techniques to enhance network lifetime by saving energy. The principal focus is on reducing the energy consumption of packet sharing (transmission and receiving) and improving the network lifespan. To achieve this objective, this paper presents a novel improved energy-efficient cluster-based routing protocol (IECRP) that aims to accomplish this by decreasing the energy consumption in data forwarding and receiving using a clustering technique. Doing so, we successfully increase node energy and network lifetime. In order to confirm the improvement of our algorithm, a simulation is done using matlab, in which analysis and simulation results show that the performance of the proposed algorithm is better than that of two well-known recent benchmarks.

• 융합보안논문지
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• 제3권1호
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• pp.31-37
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• 2003

무선통신 시스템의 표준으로 되어있는 TETRA(Trans-European Trunked RADIO) 시스템의 그룹 서비스와 소그룹 서비스의 안전한 통신을 위한 모델을 제안한다. 먼저, TETRA 시스템의 통신 서비스를 위해 인가된 구성원만이 데이터를 수신할 수 있어야하므로 안전한 브로드캐스팅 기술이 필요하다. 따라서, 본 논문에서 제안한 모델을 적용하면 소그룹 내부적으로 안전한 TETRA 통신 서비스를 위해 소그룹 키를 공유하고 그룹 내에서 이루어지는 TETRA 그룹통신 서비스를 위해 인가된 모든 구성원들이 안전하게 그룹 키를 공유하게 된다. 또한, TETRA 시스템의 통신서비스에서 그룹통신을 행함과 동시에 소그룹통신이 가능하게 된다.

• Journal of information and communication convergence engineering
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• 제13권1호
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• pp.42-49
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• 2015

In laser pointer interaction systems, laser spot detection is one of the most important technologies, and most of the challenges in this area are related to the varying backgrounds, and the real-time performance of the interaction system. In this paper, we present a robust dictionary construction and update algorithm based on a sparse model of background subtraction. In order to control dynamic backgrounds, first, we determine whether there is a change in the backgrounds; if this is true, the new background can be directly added to the dictionary configurations; otherwise, we run an online cumulative average on the backgrounds to update the dictionary. The proposed dictionary construction and update algorithm for laser spot detection, is robust to the varying backgrounds and noises, and can be implemented in real time. A large number of experimental results have confirmed the superior performance of the proposed method in terms of the detection error and real-time implementation.

• Journal of information and communication convergence engineering
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• 제13권2호
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• pp.86-96
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• 2015

In mobile communication, mobile services [MSs] (e.g., phone calls, short/multimedia messages, and Internet data) incur a cost to both mobile users (MUs) and mobile service providers (MSPs). The proposed model MobPrice consists of dynamic data pricing schemes for mobile communication in order to achieve optimal usage of MSs at minimal prices. MobPrice inspires MUs to subscribe MSs with flexibility of data sharing and intra-peer exchanges, thereby reducing overall cost. The main contributions of MobPrice are three-fold. First, it proposes a novel k-level data-pricing (kDP) scheme for MSs. Second, it extends the kDP scheme with the notion of service-sharing-based pricing schemes to a collaborative peer-to-peer data-pricing (pDP) scheme and a cluster-based data-pricing (cDP) scheme to incorporate the notion of 'cluster' (made up of two or more MUs) in mobile communication. Third, our performance study shows that the proposed schemes are indeed effective in maximizing MS subscriptions and minimizing MS's price/user.