• Journal of rehabilitation welfare engineering & assistive technology
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• v.9 no.2
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• pp.121-128
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• 2015

In this paper, we introduce our smart phone application for hearing impaired people. Unlike previous hearing aids application, our application has both functions of self hearing tests and sound amplification. We provide user with two types of self hearing test, those are standard hearing test and detail hearing test. Each test has different advantages like short test time and accurate test result, however both tests provide reliable result. Our hearing test allows that user can measure their hearing loss level according to the frequency. Sound amplification function provide proper fitting formula by using NAL-NL1, and it guarantees high speech intelligibility. Our application can also memorize user's fitting data at specific test condition. Therefore those who using our hearing aids application can easily reset their hearing aids / earphone properties periodically. Our application is advanced at the aspect of self fitting function that no other previous application did. So we are expecting these comfortable processes about fitting lead the number of hearing aids user to be increased.

• Journal of Digital Convergence
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• v.10 no.6
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• pp.241-246
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• 2012

In this paper, we apply the next generation Internet Broadcasting Move Picture solution, FlashVideo has been designed and implemented. Currently being broadcast in the field to compress HD video in real time, as well as live Internet VOD services are available through the online system, the Internet LIVE broadcast and VOD service easy to operate and UCC services that support the solution. VOD video cameras and in real time using H264 CORECODEC to compress MPEC4, WMV, and real-time video streaming on the Internet, and phone system that supports the first, real-time recording of camera images featured nation's first real-time encoder system (Real time encoder system) is, Web and smart environment suitable for supporting the latest CORECODEC technology and software products. Second, the video can be played in MP4 player and customize your chat, and customizing is a possible two-way Internet Broadcasting System. Third, CMS (Contents Management System) feature video contents and course management contents in real time via the Android phone and iPhone streaming service is available.

• Journal of KIISE
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• v.42 no.10
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• pp.1207-1221
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• 2015

This research was conducted both to analyze the determining factors of and to suggest resolution methods for the smart divide of adults over 65 years of age in the rapidly aging society of the 2000s and the smart society of the 2010s following the information society of the 1990s. The research model based on the Technology Acceptance Model (TAM) includes 6 determining factors derived from existing studies: Self Efficacy, Training, Accessibility, Playfulness, Cost Rationality, and Policy Support. Research data were collected through a survey given to a total of 243 older adults in 14 Senior Welfare Centers nationwide, and research hypotheses were verified by structural equation model (SEM) analysis. The results of this research that gives priority to the order of Political Support, Playfulness, Self Efficacy, Accessibility, Cost Rationality, and Training can be used to develop various resolution methods for the smart divide of adults over 65 years of age.

• Information and Communications Magazine
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• v.28 no.1
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• pp.22-28
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• 2010

외환위기 이후 IT는 우리 경제의 견인차로 인식되어 왔으나 2000년대 초두의 IT 버블 붕괴 이후 극심한 성장정체를 겪으면서 일부 학자 및 정책입안자를 중심으로 IT 역할에 대한 회의론적 시각이 제기되어 왔다. 그러나, 지난 2~3년간의 각종 경제지표를 볼 때, IT는 여전히 우리 경제에서 중요한 역할을 하고 있음을 확인할 수 있을 뿐만 아니라 미래사회에의 대응을 위해서도 IT에 대한 관심 제고가 무엇보다도 절실한 시점이라 하겠다. 특히, 스마트폰의 등장에 따라 스마트폰 환경에 최적화된 다양한 애플리케이션의 등장과 이를 이용한 모바일 서비스의 보급 확산으로 IT 기기 및 서비스 산업의 경쟁구조에 근본적인 변화가 발생하면서 IT 강국이라는 국가적 브랜드마저 위협받고 있는 시점이어서 더욱 그렇다. 스마트폰의 등장으로 국가경쟁력 결정 패턴이 노동과 자본 등 전통적인 생산요소에 기반한 개별 산업분야의 경쟁우위를 기초로 결정되던 형태에서 감성과 창의성 등 소프트 파워의 보유 정도에 따라 결정되는 형태로 전환되었다는 점에서 R&D전략에 있어서도 중요한 전환점을 맞고 있다고 보여진다. 또한, 산업사회와 정보사회에 이어 급격한 기술혁신에 따른 기술간 및 산업간 융합의 정도가 산업 전반의 경쟁구도에 영향을 미칠 것으로 대부분의 전문가들이 예견하고 있으나, 산업현장이나 기술분야에서 실제적으로 발생되는 융합의 양상은 그다지 신속하지 못한 것으로 나타나고 있다. 따라서, 기술간 및 산업간 융합촉진을 통한 전산업 경쟁력 제고를 위한 R&D 방향 모색이 필요한 시점이다. 이에 따라 본고에서는 스마트폰의 등장에 따른 IT산업의 경쟁구도 변화와 글로벌 기업들의 전략, 대응방향 등을 살펴보는 한편 IT의 전반적인 활용도 증가에 따라 더욱 가속화될 것으로 전망되는 기술간 및 산업간 융합시대에 대응한 IT R&D 방향을 살펴본다. 이는 궁극적으로 IT 강국이라는 국가적 브랜드 이미지의 고착화 전략인 동시에 IT 기반의 융합을 촉진시킴으로써 스마트한 IT Korea라는 국가적 미래비전을 달성해 나가기 위한 방향이 될 것이다.

• Convergence Security Journal
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• v.12 no.3
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• pp.93-97
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• 2012

In this paper, we apply the next generation Internet TV solution, FLV has been designed and implemented. Currently being broadcast in the field to compress HD video in real time, as well as live Internet VOD services are available through the online system, the Internet LIVE broadcast and VOD service easy to operate and UCC services that support the solution. VOD video cameras and in real time using H264 CORECODEC to compress MPEC4, WMV, and real-time video streaming on the Internet, and phone system that supports the first, real-time recording of camera images featured nation's first real-time encoder system (Real time encoder system) is, Web and smart environment suitable for supporting the latest CORECODEC technology and software products. Second, the video can be played in MP4 player and customize your chat, and Custer (customizing) is a possible two-way Internet Broadcasting System. Third, CMS (Contents Management System) feature video content and course management content in real time via the Android phone and iPhone streaming service is available.

• The KIPS Transactions:PartB
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• v.19B no.4
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• pp.225-230
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• 2012

In this paper, a blind person using a white cane as an adjunct of the things available sensing technology has been implemented. Sensing technology to implement things ultrasonic sensors and a webcam was used to process the data from the server computer. Ultrasonic sensors detect objects within 4meter people distinguish between those things that if the results based on the results will sound off. In this study, ultrasonic sensors, object recognition and human perception with the introduction of techniques and technologies developed for detecting objects in the lives of the visually impaired is expected to be greater usability.

• Journal of Biomedical Engineering Research
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• v.36 no.1
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• pp.31-36
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• 2015

In this study, we evaluated the effects of static magnetic fields of earphones and headphones on pacemakers and implantable cardioverter defibrillators(ICDs). Five pacemakers and three ICDs were subjected to in-vitro test with three headphones which were an in-ear earphone, clip-on headphone, and closed-back headphone. Each implantable device was placed in close proximity(within 3 mm) to the ear-pad of each of the earphone and headphones for 3 min. As a result, no effects were observed on the pacemakers for the earphone and headphones during the test, but an effect was observed on one ICD for the clip-on and closed-back headphone during the test. When the ICD was placed in close proximity to the headphones, the ICD temporarily suspended functions of tachyarrhythmia detection and therapy. The effect was not observed in this study when the headphones were at least 2 cm from the ICD. Based on these findings, patients with ICDs should be advised to keep earphones and headphones at least 2 cm apart from their ICDs.

• Journal of rehabilitation welfare engineering & assistive technology
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• v.9 no.4
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• pp.285-291
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• 2015

In this paper, we propose a classification algorithm for postures of sitting person by using IMU(inertial measurement unit). This algorithm uses PCA(principle component analysis) for decreasing the number of feature vectors to three and SVM(support vector machine) with RBF(radial basis function) kernel for classifying posture types. In order to collect the data, we designed neckband-shaped earphones with IMU, and applied it to three subjects who are healthy adults. Subjects were experimented three sitting postures, which are neutral posture, smartphoning, and writing. As the result, our PCA-SVM algorithm showed 95% confidence while the dimension of the feature vectors was reduced to 25%.

• Journal of Digital Convergence
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• v.9 no.5
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• pp.265-274
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• 2011

Smart-Learning has been increasing with the growth of smartphone usage. Looking at previous research, this study established the concept of smart learning, current understanding of smart learning and the requirements for smart learning. Subsequently, It was established a concept of SNS, reviewing future education, self-directed learning by using social network, and suggests policies of vitalizing smart-learning by using SNS. In order to use SNS in smart learning, first it is proposed the need for smart learning laws and institutions, particularly with young people considering their emotions in order to expand what is proposed. secondly, the need for SNS usage to be socially and culturally relevant. third and finally, the need for strengthening information security with co-operation from the government.

• Journal of Biomedical Engineering Research
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• v.41 no.1
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• pp.22-27
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• 2020

Auditory stimuli are commonly used in various electroencephalogram experiments, also in EEG-based brain-computer interface systems. However, using conventional earphones that blocks the ear canal attenuates or even blocks external environmental sound which might cause loss of crucial information from surroundings. Instead, bone-conductive earphones are able to deliver sound through vibration without blocking the ear canal. To investigate the feasibility of the bone-conductive earphones for auditory-stimuli based experiments, we compared N100 event-related potential features as well the event-related spectral perturbation and inter-trial coherence of auditory steady-state response between conventional and bone-conductive earphones. The results showed no significant differences between bone conduction and conventional earphones regardless of distinct sound pressures. This result shows that bone conductive earphones can be used for auditory experiments when the environmental sound is crucial to the user.