• 대한산업공학회지
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• 제42권1호
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• pp.57-64
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• 2016

Pen-based interaction is universally available on smart devices and especially on Tablet PCs. Previous studies compared various input methods like fingers, a mouse or a stylus pen on PCs or on a touchscreen based devices such as smart phones. At the same time, various soft keyboard applications are being developed on application stores of smart devices. However, these previous studies did not suggest which one is a suitable keyboard application for Tablet PCs when users perform a certain interaction as input type. In this study, we compared two types of input methods (finger and pen) and three types of soft keyboard applications (QWERTY, Gesture and Swype) in a Tablet PC using performance measurements (accuracy and input speed) and discussed what types of applications showed better performance with each interaction on tablet PC. From these results, recommendations for the keyboard types depending on the input methods on tablet PCs were developed.

• KEPCO Journal on Electric Power and Energy
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• 제2권2호
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• pp.245-251
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• 2016

Despite the exponential throughput improvement in mobile communications systems, their ability to satisfy requirements of state-of-the-art and future applications of advanced metering infrastructure (AMI) is still under investigation. Challenges are mainly due to the inadequacy of third generation partnership project (3GPP) networks to support large amounts of devices simultaneously, while the number of AMI end-devices and the frequency of their data transmission increase with new AMI-based applications. In this introductory survey, innovative and future AMI applications and their communication requirements are first reviewed. Then, we identify challenges of 3GPP long term evolution (LTE) in enabling future AMI applications. More importantly, the latest improvements to LTE-A standard release 12 and 13 are reviewed and analyzed with regards to their potential to improve the quality of LTE-enabled AMI. It is found that 3GPP enhancements on machine type communications (MTC) standards will significantly enhance AMI communications. Beyond MTC specifications, non-MTC-specific enhancements such as carrier aggregation and multi-connectivity for user equipment will also contribute greatly to improving reliability and availability of AMI devices. The paper's focus is towards improved backhaul support for innovative and future AMI applications, beyond traditional automatic meter reading.

• 스마트미디어저널
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• 제3권3호
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• pp.46-50
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• 2014

모바일 기기는 우리 삶에 많은 변화를 만들고 있다. 현재 가장 널리 쓰이는 모바일 운영체제로는 구글의 안드로이드와 애플사의 iOS, Microsoft사의 Windows Mobile이 있다. 그중에서도 안드로이드는 스마트폰과 태블릿 PC뿐만 아니라 자동차 분야까지 다양한 전자분야에서 연구되고 있다. MOST(Meclia Oriented Systems Transport)는 자동차산업 분야에서 고속 멀티미디어 통신에 사용되는 표준이다. 본 논문에서 안드로이드를 기반으로 MOST 네트워크를 이용해 차량용 인포테인먼트 소프트웨어를 설계한 결과를 제시한다.

• 한국멀티미디어학회논문지
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• 제22권11호
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• pp.1215-1222
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• 2019

Recently, people with disabilities also search for and collect information from the web through smart devices, and save collected information on smart devices or take notes. For non-disabled people, various memo applications are provided on the market, so it is more convenient to choose according to their preference. However, existing memo services are limited for use by blind people due to the importance of visual information. The problem with blind people when using smart devices is that the screen is not recognized, so it is not possible to check in which location the menu of the application exists. In addition, it is difficult to input and manipulate text, and systematic file management and control are not possible. Therefore, in this paper, we propose the development of voice memo service that blind people can use only voice and hearing information and can operate menu with Bluetooth remote controller. We will develop a system that includes a comprehensive voice file management function for storing, searching, playing, and deleting files, rather than simply storing voice files.

• 한국융합학회논문지
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• 제2권4호
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• pp.1-7
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• 2011

IT의 발전으로 기기 간 통신을 이용하는 M2M 시장이 급성장하고 있으며, 많은 기업들이 M2M 사업에 참여하고 있다. 본 논문에서는 텔레매틱스의 개념 및 차량 네트워크 보안의 취약성을 알아보았다. 차량 및 IT 기술의 융합과 이동통신망 기술의 발전은 사용자에게 제공되는 서비스의 질은 향상 시켰지만, 이로 인한 보안 위협은 다양해졌다. 텔레매틱스 사업에서 이동통신사업자의 참여로 생성될 수 있는 새로운 비즈니스 모델을 제시하였으며, 이러한 환경에서 발생 될 수 있는 차량 이동통신망 보안 취약성을 분석하였다. 이 중 발생할 수 있는 취약성을 해결하기 위한 방법으로 M2M 기기와 스마트폰 및 차량 상호 인증 기법을 제시하였다.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제14권6호
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• pp.2591-2611
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• 2020

Botnets have become one of the most significant threats to Internet-connected smartphones. A botnet is a combination of infected devices communicating through a command server under the control of botmaster for malicious purposes. Nowadays, the number and variety of botnets attacks have increased drastically, especially on the Android platform. Severe network disruptions through massive coordinated attacks result in large financial and ethical losses. The increase in the number of botnet attacks brings the challenges for detection of harmful software. This study proposes a smart framework for mobile botnet detection using static analysis. This technique combines permissions, activities, broadcast receivers, background services, API and uses the machine-learning algorithm to detect mobile botnets applications. The prototype was implemented and used to validate the performance, accuracy, and scalability of the proposed framework by evaluating 3000 android applications. The obtained results show the proposed framework obtained 98.20% accuracy with a low 0.1140 false-positive rate.

• 한국멀티미디어학회논문지
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• 제14권4호
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• pp.481-493
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• 2011

모바일기기가 발달함에 따라 핸드폰에 수많은 기능들이 탑재되고 있다. 영상 통화 기능도 그 중 하나이다. 본 논문에서는 화자와 스마트폰 사이의 거리를 측정하기 위한 다중 색좌표계와 다중 임계치를 사용하는 방법을 제시한다. 첫 번째로 피부색의 색상정보에 근거하여 얼굴영역을 검출한다. 두 번째로 검출된 얼굴영역의 크기를 이용하여 스마트폰과 화자 사이의 거리를 측정한다. 특히 본 논문에서 제시하는 얼굴영역 검출 알고리즘 개발에 있어 고려한 점은 스마트폰의 기본기능과 함께 실시간으로 처리가 가능할 정도로 연산량이 적어야 하며, 움직임이 많은 핸드폰의 특성상 프레임과 프레임 사이의 움직임과 조명 및 배경에 따라 검출된 얼굴 영역이 급격히 변화하는 문제를 해결할 수 있는 얼굴영역 검출 알고리즘을 개발하고자 하였다.

• 한국멀티미디어학회논문지
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• 제18권2호
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• pp.218-232
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• 2015

According to the development of information processing technology and mobile communication technology, the utilization of mobile banking systems is drastically increasing in banking system. In the foreseeable future, it is expected to increase rapidly the demands of mobile banking in bank systems with the prevalence of smart devices and technologies. However, the keeping 'security' is very important in banking systems that handles personal information and financial assets. But it is very difficult to improve the security of banking systems only with the vulnerabilities and faults analysis methods of information security. Hence, in this paper, we accomplish the analysis of security risk factor and security vulnerability that occur in mobile banking system. With analyzed results, we propose the information security control and management processes for assessing and improving security based on the mechanisms which composes mobile banking system.

• 한국정보통신학회:학술대회논문집
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• 한국해양정보통신학회 2006년도 춘계종합학술대회
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• pp.749-753
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• 2006

1986년 컴퓨터 바이러스가 발견된 후, 매년 새로운 바이러스들이 나타나고 있다. 최근에는 모바일 기기(휴대폰, PDA)들을 대상으로 하는 악성코드(바이러스, 웜, 트로이목마)들이 발생하고 있다. 향후 모바일 기기의 보급과 업무 활용이 증가함에 따라 이에 대한 대비가 필요하다. 본 논문에서는 악성코드들의 종류와 특징들을 조사 운석하고 모바일 환경에서의 보안 고려사항들을 살펴본다.

• Asia pacific journal of information systems
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• 제30권1호
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• pp.72-93
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• 2020

With the proliferation of smart devices, mobile banking has become increasingly important. Customers can manage their banking needs without desktop computers or a face-to-face meeting with bank tellers. However, contrary to expectation of wide-spread use of mobile banking, several factors restrict its adoption. The purpose of this study is to explore what factors affect positively or negatively the adoption of mobile banking from economic (operational competence, convenience, mental accounting), psychological (hope, self-efficacy, optimism, resiliency) and social perspectives (normative social pressure, embarrassment avoidance). This paper suggests that three enablers would consequently affect a customer's perceived utilitarian and hedonic value in mobile banking, followed by trust and intention to use. In testing the hypothesized research model, survey and analysis of a structural equation model using Amos are conducted. The findings emphasize that banks need to focus on perceived utilitarian and hedonic values when considering economic, psychological and social enablers most salient to customers in order to promote greater adoption of mobile banking services.