• Journal of the Institute of Electronics Engineers of Korea SD
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• v.46 no.11
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• pp.40-47
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• 2009

In this paper, we present the design of a source driver of QVGA scale TFT-LCD driver IC which uses a mixed driving method and performs $\gamma$-correction to improve image. The source driver with 240 RGB ${\times}$ 320 dots resolution drives a TFT-LCD panel through 720 channels and implements 262k colors using 18-bit RGB data format. The mixed driving method is a mixture the channel amp. driving method with high drivability and the gray amp. driving method with small area, which remarkably reduces channel driver areas. The driver has been designed using the $0.35{\mu}m$ Magnachip embedded DRAM technology and simulated using the HSPICE simulator. The results show that our source driver operates well with y-correction and the channel driver has $17{\mu}s$ channel driving time with only 78 driving amplifiers and control logic.

• The Journal of The Korea Institute of Intelligent Transport Systems
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• v.2 no.2 s.3
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• pp.1-12
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• 2003

DAB(Digital audio broadcasting) is a next generation radio broadcasting system which provides CD quality audio, various data services and superior reception ability when moving. Also, it can show traffic informations and news literally or graphically. In this paper, we design and fabricate the DAB tuner for ITS service that follows Eureka-147 and ETSI 300 401 specifications. This small-sized tuner can be adopted to mny electronic equipments such as a Hi-Fi audio, DVD player, car audio system etc.. The overall performance of the tuner depends on a phase noise of VCO and the sensitivity of the receiving system is influenced by LNA, image rejection filter and channel selection filter. All our measurement results satisfy the specification for a DAB system with the return loss of 9dB, the noise figure of 6dB for both Band 111 and L-band and the sensitivity of -97dBm.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.19 no.10
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• pp.2241-2246
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• 2015

Recently for efficient management, companies have collected and investigated information about customers' feedback by using a system that analyzes big data from social media. This paper proposes more accurate and efficient evaluation method of collecting and investigating customers' feedback using social big data for travel agency, which is representative company of hospitality industry. First, it designs service model and, as a test-bed, analyzes media channel, customer satisfaction, and brand-image etc. of big 5 travel agencies in Korea. In addition, we suggest an analysis result of evaluating preference with positive rate and negative rate by proposed evaluation method. It allows a travel agency to know which area should be improved corresponding to evaluation item; thus, suggested evaluation method is effective to manage customers even more efficiently.

• Journal of Digital Convergence
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• v.15 no.3
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• pp.307-312
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• 2017

The purpose of this paper is to develop a new type of RGB lighting pipeline that can save time in animation production. After identifying the problems of the current method, the researchers studied 8 steps through new methods and comparative analysis. A method of implementing a graphic image lighting effect by the RGB lighting pipeline according to the current method is to create a render layer for each light set and a set of digital light separated by texture, Three types of written information can be stored in one layer and graphic image, and the accuracy and precision of color correction can be improved. Through this study, we propose the new and improved RGB lighting pipeline according to the characteristics of the work and the industries.

• Journal of Digital Convergence
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• v.16 no.10
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• pp.427-436
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• 2018

Companies are now using SNS as an online marketing channel and increasingly using it for customer relationship management(CRM). Although companies are actively using social media for marketing, language study brands in South Korea are using social media marketing in widely different ways. Among various components of social media marketing activities, this study analyzed the effects of informativeness, content suitability, and recency of social media marketing on consumers from the perspectives of brand equity and purchase intent. In the results, components of social media marketing activities had significant effects on brand equity, in the order of recency, content suitability, and informativeness. Second, brand equity and consumer purchase intent had significant correlation. And having a child also influenced purchase intent. The results of this study can be used as basic data for research on social media marketing of language schools and propose a theoretical direction for future research in the field as there is little academic data related to the subject.

• Journal of the Institute of Electronics Engineers of Korea CI
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• v.44 no.4 s.316
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• pp.36-44
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• 2007

In this paper, we implement the speech & face recognition system to support various ubiquitous sensor network application services such as switch control, authentication, etc. using wireless audio and image interface. The proposed system is consist of the H/W with audio and image sensor and S/W such as speech recognition algorithm using psychoacoustic model, face recognition algorithm using PCA (Principal Components Analysis) and LDPC (Low Density Parity Check). The proposed speech and face recognition systems are inserted in a HOST PC to use the sensor energy effectively. And improve the accuracy of speech and face recognition, we implement a FEC (Forward Error Correction) system Also, we optimized the simulation coefficient and test environment to effectively remove the wireless channel noises and correcting wireless channel errors. As a result, when the distance that between audio sensor and the source of voice is less then 1.5m FAR and FRR are 0.126% and 7.5% respectively. The face recognition algorithm step is limited 2 times, GAR and FAR are 98.5% and 0.036%.

• Proceedings of the Korean Vacuum Society Conference
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• 2010.02a
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• pp.66-66
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• 2010

$SnO_2$ 나노선은 n-type 반도체 특성을 띄며 트랜지스터, 가스 센서, pH 센서 등 여러 분야에 걸쳐 다양하게 사용되고 있다. $SnO_2$ 나노선은 그 자체만으로 시계방향의 전기적 히스테리시스를 보이며 이것은 나노선 표면에 흡착된 물이나 산소가 발생시키는 전자 갇힘 현상이 가장 큰 원인으로 작용한다. 특히 고분자를 게이트 절연막으로 사용할 경우 게이트 절연막의 전기적 히스테리시스가 소자 특성에 영향을 미치게 되며, 고분자 절연막의 히스테리시스는 $SnO_2$ 나노선의 히스테리시스와 반대인 반시계 방향의 특성을 보인다. 고분자 내에서 발생하는 히스테리시스는 고분자 사이에 흡착된 물 분자나 고분자의 높은 극성을 가지는 작용기 등이 원인으로 작용한다. 전기적 히스테리시스는 FET소자를 구동하는데 있어 부적절한 특성으로, 이것의 원인을 이해하는 것은 중요하며 히스테리시스의 방향과 크기를 조절할 수 있는 기술 또한 중요하다. 본 연구에서는 폴리이미드(PMDA-ODA)를 게이트 절연막으로 사용하여 플렉시블 기판을 만들고 그 위에 $SnO_2$ 나노선을 슬라이딩 전이 방식으로 정렬하여 플렉시블 FET를 제작하였다. 제작된 소자는 $0.7cm\;{\times}\;0.7cm$ 넓이 안에 300개의 FET가 존재하며 SEM 이미지를 통해 넓이 $50{\mu}m$, 길이 $5{\mu}m$의 FET채널에 약 150개의 나노선이 연결되어 있는 것을 확인했다. 이 소자의 히스테리시스는 폴리이미드의 교차결합 정도에 따라, 그리고 폴리이미드 절연막을 제작할 때의 습도에 따라 변하게 된다. 교차결합이 많아지고 습도가 낮아질수록 폴리이미드 절연막 내부에 흡착되는 물분자가 줄어들게 되고 절연막의 히스테리시스가 사라지며 시계방향의 나노선 히스테리시스가 지배적이 된다. 반대로 교차결합이 줄어들고 습도가 높아질수록 폴리이미드 절연막 내부에 물분자가 늘어 나면서 시계반대방향의 폴리이미드 히스테리시스가 FET의 전기적 특성에서 눈에 띄게 나타난다. 이 실험을 통해 고분자 절연막을 사용한 $SnO_2$ 나노선 FET의 전기적 히스테리시스를 조절할 수 있었으며, 소자의 히스테리시스를 없앨 수 있는 가능성에 대해서 논하고자 한다.

• The Journal of the Korea Contents Association
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• v.19 no.9
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• pp.135-143
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• 2019

Purpose of this study is enhancing usability of online video platform by analyze link-depth and advertisement frequency. In this study, researcher checked market share of video platform which publishing web-drama, and compare their link-depth and advertisement frequency. As a result, access to the latest content has two to three link-depth. So it does not worsen usability. but, if contents doesn't show on main page or search result, it requires more than five to six steps. Image advertisement show up more than twice on every platform. 'Youtube' and 'Naver TV' show up pre-roll video advertisement in video player before offering contents. In this video platform information structure, directory searching needs high link-depth level and advertisement frequency. It will increase user's bounce rate and decrease return visit rate. So researcher suggests prototype using drop-down menu to reduce link-depth and enhance information structure.

• The Journal of the Korea Contents Association
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• v.22 no.1
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• pp.10-22
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• 2022

This study analyzed the effects of YouTube comments on belated hit in music chart by focusing on VIDITOR's YouTube channel video called 'BraveGirs_Rollin_comment_Collection'. For this, first of all, it investigated how the comments used by the channel master could achieve storytelling. Moreover, the reason for its popularity hit was researched by analyzing the comments made by users on this video through the 'Tipping point' rules. As a result, it was seen that this video created storytelling by connecting Brave Girls to the story of the Korean army. At the 'Tipping point,' besides, it was revealed that 'the law of the few' is the military, and 'the stickiness factor' is the good image left through Korea's island, 'Baengnyeongdo,' performance. Finally, the rule of 'the power of context' was indicated that it is a difficult reality situation because of COVID-19 and the good situation due to direct communication through the comments of Brave Girls' members and the company.

• The Journal of the Convergence on Culture Technology
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• v.8 no.6
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• pp.175-184
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• 2022

Travel YouTubers who cross the boundary between tradition and novelty communicate by sharing their activities with others through SNS-based media. Media content should not only satisfy individuals, nor should it be too purpose-oriented. YouTube channels should be operated so that users can easily access content naturally, and more diverse methods can be pursued based on usage patterns and satisfaction theory. This study is about the type of perception of Generation Z on travel YouTube titles. As a result of conducting QUANL program analysis on 34 Q samples and 28 P samples from the Q methodological perspective, a total of three types were found. For types with unique characteristics, the first type was named "attention of keywords that draw imagination," the second type was "preferred to stories that stimulate curiosity," and the third type was "image satisfaction reflecting expectations." In addition, considering the characteristics of each type found, the scalability and strategic plan of the activities that Generation Z travel YouTubers want to unfold were presented.