• 한국인터넷방송통신학회논문지
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• 제13권5호
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• pp.101-105
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• 2013

본 논문은 셀 사이트에서 다양한 트래픽을 수용하기 위한 이동 백홀 네트워크에서 QoS 기능에 관한 것이다. RAN 시스템의 스위칭 기능에 할당된, 이더넷 프레임, IP 패킷, 그리고 ATM 셀과 같은 트래픽은 세그먼트된 후 이동백홀 네트워크로 전달되기 전에 캡슐화 된다. ISP는 표준의 pseudowire 캡슐화를 통하여 all IP RAN 상에 음성 및 HSPA와 같은 모든 세대의 트래픽을 통합할 수 있다. 이것들은 다양한 QoS 방법뿐만 아니라 포괄적인 모니터링 및 진단 능력을 통하여 강화될 수 있다. 따라서 본 논문에서는 이와 같은 동작상에서 QoS 기능들이 서로 다른 갭슐 방법에 따라 시뮬레이션 되었다.

• 전자공학회논문지A
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• 제33A권4호
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• pp.37-46
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• 1996

In this paper, we analyzed the performance improvement of the DS-CDMA/dPSK cellular mobile communication system with CCI canceller and RAKE receiver techniques in mobile radio channel which is characterized by AWGN, Multi-user interference (mUI) and frequency-selective rayleigh fading. System capacity i.e., number of user per cell has been derived and the evaluated results are shown in figuraes as a function of PN code sequence length, number of RAKE receiver tap, BER and E$_{b}$/N$_{o}$. The voice activity factor is assumed to be 3/8 the number of sectors in a cell 3 and MUI is modeled as gaussian process. From the results, the capacity of the DS-CDMA/DPSK cellular mobile communication system is improved by adopting CCI canceller. When we adopt the RAKE receiver to mitigate the multipath fading, the error performance is improved and the amount of improvement is proportional ot the number of taps L in the case that each tap contains a signal component and the better of improvement can be obtained, the smaller of the SNR difference in each tap. The system capacity is more increased when the CCI canceller and the RAKE receiver is used in cascade.

• 한국컴퓨터정보학회논문지
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• 제23권4호
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• pp.71-80
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• 2018

In this paper, we developed an interactive animation authoring tool and developed the Android based interactive edutainment contents. The authoring tool for creating interactive animations developed in this paper is based on a graphical user interface, so users can easily create interactive animations. Interactive animation contents created by this authoring tool can be created as images and xml files so that they can be used directly on mobile devices. In order to increase learning efficiency for children, Android-based interactive edutainment electronic storybooks, which is implemented using this authoring tool, provided a recording function to listen to the parents' voice as well as an interactive action in which the characters move in accordance with the story line. We also provided a STEAM game that combines creativity and imagination with creative science and technology. Therefore, by creating the edutainment contents through the proposed authoring tool for interactive animation, various interactive animation contents could be produced more easily than the code implementation method. Through this study, I hope that it will be helpful for the development of various interactive edutainment contents to provide educational contents considering the quantity and quality to infants.

• 산업경영시스템학회지
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• 제37권1호
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• pp.68-78
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• 2014

Recently, companies are trying to gain a competitive advantage in the market to meet the voice of customer. For this purpose, QFD has been used as product development technology in many areas to include the customer' requirements. Also, Kano model has been used to understand the customer' requirements for an effective way. Therefore integration of Kano model and QFD can more efficiently reflect the customer' requirements when designing a new service. This paper proposes PI index by taking into account the current satisfaction position of our company and competitors while IR (Improvement Ratio) value was set uniformity. This study suggests a more accurate index to predict potential improvements and calculates the final importance or priority. Through case studies targeted at elevator maintenance companies, we can have a general idea how much to improve in the near future and estimate the final importance of customer requirements.

• 한국통신학회논문지
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• 제22권4호
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• pp.782-792
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• 1997

ATM은 광대역망에서 여러 형태의 멀티미디어 서비스를 지원하는 수단을 제공한다. 멀티미디어 서비스를 지원하기 위해서는 다수의 우선순위를 갖는 다양한 트래픽을 효율적으로 제어할 수 있어야 하며, 이러한 제어동작을 수행하기 위해서는 망내에 혼잡제어 기능이 요구된다. 이러한 문제를 유연하고 효과적으로 해결하기 위해서는 일반적으로 다단계의 서비스 레벨을 제공하는 방식이 사용된다. 본 논문에서는, ATM망에서 다른 우선순위를 갖는 음성과 데이타 트래픽이 다중화 되어 입력될 경우, 전체적인 망의 성능을 향상시키기 위해 임계치를 가지는 기존의 버퍼와 낮은 우선순위 셀을 수용하는 보조버퍼로 분할하는 방식을 사용하는 버퍼 관리 알고리즘을 제시하였다. 버퍼 관리 방법의 성능을 평가하기 위해 망내에 두가지의 우선순위를 고려하여 모의 실험을 수행하였고, 그 결과 기존의 분할 버퍼를 사용한 방법보다 전체적인 망의 성능이 향상되었음을 확인하였다.

• 한국군사과학기술학회지
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• 제18권4호
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• pp.423-431
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• 2015

A leased line modem usability was evaluated and investigated in the wireless internet protocol(IP) network. The signal of the modem in the circuit switching network was translated to IP packet by using several voice codecs (PCM, G.711A, $G.711{\mu}$, and etc.) and transmitted through the wireless IP network. The wireless IP network was simulated by the Tactical information and communication network Modeling and simulation Software(TMS). The performance and usability of the leased line modem are simulated using the system-in-the-loop(SITL) function of TMS with respect to packet delay, jitter, packet discard ratio, codecs, and wireless link BER.

• 스마트미디어저널
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• 제6권3호
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• pp.29-40
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• 2017

최근 NFC 기능이 탑재되어있는 스마트폰의 비중이 급속하게 많아지고 있으며, 이로 인해 NFC 관련 기술이 많은 기업들에 의해 만들어지고 있다. NFC기반 2 factor 전자결제시스템의 보안기능 향상과 새로운 서비스를 위해 갤러리-옥션을 개발하였다. XenServer를 이용해 효율적으로 서버를 관리 할 수 있도록 하였으며, 향상된 보안기능은 FIDO 인증기술을 적용하기 위해 지문인식을 통한 사용자 인증 모듈의 개발 및 TTS를 이용한 갤러리-옥션의 전자계약 음성서비스를 개발하였으며, 실제 적용을 통해 테스트 한 결과, NFC 모바일 전자결제를 통한 사용자의 편리하고 간단한 인증방식과 보안성을 강화하였다.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2007년도 하계학술대회 논문집 Vol.8
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• pp.511-512
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• 2007

The monitoring system has won acceptance as a premium mark that identifies the highest standard of product quality in advanced industry. The TOP features with multi-I/O ports and VGA & RCA TV-out ports supporting mirroring & multiple dual-display modes by windows 0/5. With the choice of versatile stands, panel mount, or VESA wall-mount swing arm and connecting to modem. Wireless keyboard, Customer Display and Card Reader, is your idea Panel system for the application of TOP(Touch Operation Pannel), KIOSK, or Office / Factory Automation. TOP is the hardware and software product that transacts all kind of functions for advanced technology equipment to button, switch, voice and graph etc so that let consumer use easily Industrial HMI System Touch Panel. System characteristics: Easy of use and flexibility to the user, Present a high value solution and advanced function for many Application, Factory Automation, Office Automation, Building Automation System, Information Service System, etc. Analog Touch - 2MB Flash Memory for Saving Screen Data - RS-232C/422 Serial Port - Multi Language Support.

• Journal of Information Processing Systems
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• 제17권4호
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• pp.754-771
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• 2021

In the task of continuous dimension emotion recognition, the parts that highlight the emotional expression are not the same in each mode, and the influences of different modes on the emotional state is also different. Therefore, this paper studies the fusion of the two most important modes in emotional recognition (voice and visual expression), and proposes a two-mode dual-modal emotion recognition method combined with the attention mechanism of the improved AlexNet network. After a simple preprocessing of the audio signal and the video signal, respectively, the first step is to use the prior knowledge to realize the extraction of audio characteristics. Then, facial expression features are extracted by the improved AlexNet network. Finally, the multimodal attention mechanism is used to fuse facial expression features and audio features, and the improved loss function is used to optimize the modal missing problem, so as to improve the robustness of the model and the performance of emotion recognition. The experimental results show that the concordance coefficient of the proposed model in the two dimensions of arousal and valence (concordance correlation coefficient) were 0.729 and 0.718, respectively, which are superior to several comparative algorithms.

• Journal of Contemporary Eastern Asia
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• 제17권2호
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• pp.147-175
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• 2018

Under authoritarian regimes, citizen-led NGOs such as environmental NGOs (ENGOs) often operate under close scrutiny of the government. While this presents a challenge to a single ENGO, we propose here - in line with existing research on network effects - that there are opportunities for multiple ENGOs to coordinate and thus work in ways that supersede government controls, affect public opinion, and contribute to policy revision and/or creation. In this paper, we specifically examine the possibility that the gamut of citizen-based ENGOs in China are coordinating. Based on network analysis of ENGOs web pages as well as interviews with more than a dozen ENGO leaders between 2014 and 2016, we find that ENGOs have few direct and public connections to each other, but social media sites and personal connections offline provide a crucial function in creating bridges. A closer examination of these bridges reveals, however, that they can be substantive to the environmental discussion or functional to the dissemination of web page information but typically not both. In short, ENGOs in China are not directly connected but rather are connected in a way that responds to the available social media and the government's censorship practices.