• Journal of Information Processing Systems
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• 제7권1호
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• pp.209-220
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• 2011

One of the major factors influencing the phenomenal growth of the smart phone market is the active development applications based on open environments. Despite difficulties in finding and downloading applications due to the small screens and inconvenient interfaces of smart phones, users download applications nearly every day. Such user behavior patterns indicate the significance of smart phone applications. So far, studies on applications have focused mainly on technical approaches, including recommendation systems. Meanwhile, the issue of culture, as an aspect of user characteristics regarding smart phone use, remains largely unexamined throughout the world. Hence, the present study attempts to analyze the highest ranked smart phone applications downloaded and paid for that are ranked the highest in 10 countries (Korea, Japan, China, India, the UK, USA, Indonesia, Canada, France, and Mexico) and we then derive the CDSC (Cultural Dimensions Score of Content) for these applications. The results derived are, then, mapped to the cultural dimensions model to determine the CISC (Cultural Index Score for Country). Further, culturally significant differences in smart phone environments are identified using MDS analysis.

• 인터넷정보학회논문지
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• 제19권6호
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• pp.73-82
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• 2018

We often experience complex presence of files within the compute environment. It could be an end-user's desktop environment or a professional part of file management. We would like to suggest one way to manage these different cases of duplicate files. It is a rule-based file management tool, and we want to use it as a tool to consolidate facility management log files. In this paper, we will describe the rule-based file management tools and show examples of how files are managed using them. We are interested in the management of the disaster environment and would like to apply this method to the management of log data related to facilities to be considered in the event of a disaster.

• 한국정보기술학회 영문논문지
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• 제10권1호
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• pp.57-69
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• 2020

In general, many IoT devices, including smart phones, use LTE, Wi-Fi, and Bluetooth, and these communication modules generate a lot of energy consumption during periodic data transmission. This paper proposes a method of the data transmission mode change for improving energy efficiency in various communication environments that mobile devices may encounter. We propose an algorithm for setting the mode considering energy efficiency, data transmission performance and cost when the mobile device transmits data, and transmitting the data in an optimized manner according to the state of the mobile device. The proposed algorithm is implemented through experiments on energy efficiency for each communication module, and the scenario is used to verify how efficiently the proposed algorithm uses energy.

• 한국정보처리학회:학술대회논문집
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• 한국정보처리학회 2011년도 춘계학술발표대회
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• pp.250-253
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• 2011

Chip manufacture nowadays turned their attention from accelerating uniprocessors to integrating multiple cores on a chip. Moreover desktop graphic hardware is now starting to support general purpose computation. Desktop users are able to use multi-core CPU and GPU as a high performance computing resources these days. However exploiting parallel computing resources are still challenging because of lack of higher programming abstraction for parallel programming. The 2-dimensional discrete cosine transform (2D-DCT) algorithms are most computational intensive part of JPEG encoding. There are many fast 2D-DCT algorithms already studied. We implemented several algorithms and estimated its runtime on multi-core CPU and GPU environments. Experiments show that data parallelism can be fully exploited on CPU and GPU architecture. We expect parallelized DCT bring performance benefit towards its applications such as JPEG and MPEG.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제14권4호
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• pp.1520-1542
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• 2020

Traditional software testing typically uses many physical resources to manually build various test environments, resulting in high resource costs and long test time due to limited resources, especially for small enterprises. Cloud computing can provide sufficient low-cost virtual resources to alleviate these problems through the virtualization of physical resources. However, the provision of various test environments and services for implementing software testing rapidly and conveniently based on cloud computing is challenging. This paper proposes a multilayer cloud testing model based on cloud computing and implements a hybrid cloud testing system based on virtual machines (VMs) and networks. This system realizes the automatic and rapid creation of test environments and the remote use of test tools and test services. We conduct experiments on this system and evaluate its applicability in terms of the VM provision time, VM performance and virtual network performance. The experimental results demonstrate that the performance of the VMs and virtual networks is satisfactory and that this system can improve the test efficiency and reduce test costs through rapid virtual resource provision and convenient test services.

• 디지털산업정보학회논문지
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• 제9권1호
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• pp.9-23
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• 2013

In recent days, there are many researches of wireless LAN services as the communication environment of wireless LAN are so improved that a lot of services are available in wireless environments. The frequency of the wireless LAN is a general resource that can be used to everyone without any permission. Many technologies using this ISM (Industry Science Medical) frequency band are developed fast and widely. But, as many devices use the same frequency band at th same time, the service quality is degraded and the speed of the service rate id degraded by the result of the interference. For overcome this problem, we must provide the new technology of the mobile devices and a new cell design scheme for obtaining maximum throughput that considering the wireless environments effectively. In this paper, we explain the main technology at the IEEE 802.11n environments and proposes the optimal cell design and reference model for gaining maximum performance to many mobile devices at the same time by investigating real environment testing results.

• 한국빅데이터학회지
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• 제1권1호
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• pp.23-32
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• 2016

정보기술 발전은 기업이 보유하고 있는 다양한 구조 및 비구조 데이터를 관리할 수 있게 하였다. 이러한 빅데이터 활용은 기업의 새로운 비즈니스 핵심가치로 평가 받고 있다. 본 연구에서는 빅데이터로 인해 더욱 중요하게 평가받는 데이터 자원이 기업 분석 활용에 미치는 영향을 연구하고자 한다. 최신 해외 보고서들을 살펴보면, 빅데이터 활용성과에 대한 실증 연구를 보여주고 있다. 이러한 해외 실증 연구와 비교하여 국내 기업의 빅데이터 활용 특성을 분석하고자 한다. 본 연구 결과는 향후 빅데이터 활용 기업에 적용 가능한 성숙모형 개발에 도움을 줄 수 있을 것이다.

• 정보보호학회논문지
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• 제16권2호
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• pp.3-12
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• 2006

모바일 디바이스, PDA, 센서들의 확산은 실생활 공간이 지능적이고 향상된 서비스를 제공하는 스마트 공간으로 전환되는 유비쿼터스 컴퓨팅 환경이 구축될 수 있도록 하였다. 그러나 모바일 디바이스, PDA, 센서들과 같은 다양한 유비쿼터스 디바이스들의 초기 설계 단계부터 프라이버시 문제를 고려하지 않는다면 유비쿼터스 감시체제가 구축될 위험성이 있다. 또한 유비쿼터스 컴퓨팅 환경에서의 다양한 디바이스들은 대체로 컴퓨팅 연산 능력이 적기 때문에, 공개키 기반의 암호기술을 적용하는 것은 부적절할 수 있다. 본 논문에서는 유비쿼터스 컴퓨팅 환경에서의 사용자 프라이버시를 위하여 익명성이 보장되고, 컴퓨팅 연산 능력이 적은 디바이스를 위한 효율적인 사용자 인증 및 키 동의 프로토콜을 제안한다.

• The Plant Pathology Journal
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• 제34권6호
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• pp.459-469
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• 2018

Plants and microorganisms (microbes) use information from chemicals such as volatile compounds to understand their environments. Proficiency in sensing and responding to these infochemicals increases an organism's ecological competence and ability to survive in competitive environments, particularly with regard to plant-pathogen interactions. Plants and microbes acquired the ability to sense and respond to biogenic volatiles during their evolutionary history. However, these signals can only be interpreted by humans through the use of state-of the-art technologies. Newly-developed tools allow microbe-induced plant volatiles to be detected in a rapid, precise, and non-invasive manner to diagnose plant diseases. Beside disease diagnosis, volatile compounds may also be valuable in improving crop productivity in sustainable agriculture. Bacterial volatile compounds (BVCs) have potential for use as a novel plant growth stimulant or as improver of fertilizer efficiency. BVCs can also elicit plant innate immunity against insect pests and microbial pathogens. Research is needed to expand our knowledge of BVCs and to produce BVC-based formulations that can be used practically in the field. Formulation possibilities include encapsulation and sol-gel matrices, which can be used in attract and kill formulations, chemigation, and seed priming. Exploitation of biogenic volatiles will facilitate the development of smart integrated plant management systems for disease control and productivity improvement.

• 한국비블리아학회지
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• 제26권2호
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• pp.129-153
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• 2015

본 연구의 목적은 다양한 학문 및 전문분야 연구자들의 정보이용행태에 관련된 선행연구들을 조사하여 이용자들의 요구를 반영한 효과적인 정보서비스를 위한 기초자료를 제공하는데 있다. 1970년대부터 2014년까지 수행된 정보이용행태와 밀접하게 관련이 있는 국내 연구들을 중심으로 조사하였으며, 과학기술, 사회과학, 그 외 기타분야로 구분하여 기존 연구들의 연구방법, 대상, 변인, 그리고 결과에 중점을 두고 분석하였다. 선행연구에서 사용한 연구방법은 설문조사와 같은 정량적 방법을 주로 사용하였으며, 정보이용 목적, 정보요구, 정보이용 유형, 만족도 등의 분석 변수가 공통적으로 사용되었다. 각 분야의 연구자들은 디지털 환경에 따른 정보이용의 변화를 보이는 가운데, 주제분야, 신분 및 직위 등에 따라서 정보요구 및 이용행태가 다르게 나타나 이용자 특성을 고려한 차별화된 정보서비스를 제안하였다.