• 제목/요약/키워드: Information Origin

검색결과 857건 처리시간 0.037초

A Theoretical Investigation Into the Cause of the Spontaneous Firing of Sguid Axon By Computer Simulation

  • 서병설
    • 정보과학회지
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    • 제5권1호
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    • pp.62-78
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    • 1987
  • 인체의 신경조직에서 정보를 전달하기 위해서 발생하는 Signal인 spontaneous firing의 origin을 조사하기 위해서 Hodgkin-Huxley의 수학적 모델을 기초로 하여 Simulation을 하였다. 그 모델의 Parameter인 Stimulus current를 zero로 함으로써 생리학적으로는 stimulus없이 어떤 특정한 근육근 등에서 발생되는 spontaneous firing의 경우가 되었고 또한 physical meaning들을 포함하고 있는 parameter들의 상호 독립적 상태를 초래하여 그 firing의 origin을 연구할수 있게 되었다. 이 simulation을 통하여 얻어진 수확들은 origin에 대한 조사 연구뿐만 아니라 많은 새로운 사실의 발견에도 존재한다. 그 예로서는 이 simulation이 stimulus 없이 spontaneous firing을 얻은 최초가 되며 이 분야에 명성있는 학자들이 simulation을 통해서는 매우 제한된 수의 firing만을 얻을수 있다고 단언했으나 그 반증이 여기에서 입증되었고 leakage conductance의 중요성을 예측하게 한다. 특히 leakage potential이 firing의 수를 조정할수 있다는 것은 특이한 발견이다.

중국 휴대폰 시장에서 원산지 이미지가 소비자의 구매 의도에 미치는 영향에 관한 실증 연구 (Empirical Study on the Impact of China Mobile Phone Market Origin Image on Consumers' Purchasing Intention)

  • 고택;심재연;요선
    • 한국융합학회논문지
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    • 제10권11호
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    • pp.101-109
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    • 2019
  • 중국 경제가 빠른 속도로 발전함에 따라 중국 소비자들의 소비 관념에도 변화가 생겼다. 브랜드 원산지가 소비자의 구매 의도에 영향이 미치고 있는 것이다. 본 논문은 원산지 이미지의 제고를 통하여, 기업이 글로벌 마케팅활동에서 경쟁우위를 확보하기 위한 연구이다. 브랜드 이미지의 기초 이론을 바탕으로 원산지 이미지가 소비자의 구매 의도에 영향을 주는 새로운 모형과 연구 가설을 제기하였다. 양적 연구방법과 질적 연구방법을 혼합한 연구방법을 이용하였는데, SPSS 23.0을 이용하여 설문지 내용의 데이터를 수집하여 분석하였다. 연구결과는 원산지의 이미지가 소비자 구매의도에 정(+)의 영향을 미치는 것으로 나타났고, 인지 가치에서도 소비자의 구매 의도에 정(+)의 영향이 미치는 것으로 나타났다. 마지막으로 실증연구결과를 종합하여, 현지 기업에게 새로운 마케팅전략과 개선책을 제시하였고, 다국적 기업들에게도 중국 시장에서의 판매 전략을 고려할 수 있도록 하였다.

Optical follow-up observation of three binary black hole merger events with the KMTNet.

  • Kim, Joonho;Im, Myungshin;Paek, Gregory S.H.;Lee, Chung-Uk;Kim, Seung-Lee;Choi, Changsu;Lim, Gu;Lee, Hyung Mok;Kim, Sophia;Hwang, Sungyong
    • 천문학회보
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    • 제44권2호
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    • pp.76.1-76.1
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    • 2019
  • After the first identification of electromagnetic counterpart of gravitational wave source (GW170817), era of multi-messenger astronomy has begun. For specifying coordinate, magnitude, and host galaxy information, optical follow-up observation of GW source becomes important. The O3 run of LIGO / VIRGO started after April 2019. We present searching strategy of GW optical counterpart using the KMTNet. By performing tiling observation of high probability area in GW localization map, we expect to observe early light-curve of GW optical counterpart. We will also present observation result for three gravitational wave events of binary black hole mergers. After identification of optical counterpart, we will study collision mechanism, progenitor, and characteristics of host galaxy using observation data of GW source.

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힘 반향 조이스틱을 이용한 햅틱 인터페이스 (A Haptic Interface Using a Force-Feedback Joystick)

  • 고애경;김홍철;이장명;최준영
    • 제어로봇시스템학회논문지
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    • 제13권12호
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    • pp.1207-1212
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    • 2007
  • We propose a haptic interface algorithm for joystick operators working in remote control systems of unmanned vehicles. The haptic interface algorithm is implemented using a force-feedback joystick, which is equipped with low price DC motors without encoders. Generating specific amounts of forces on the joystick pole according to the distance between a remote controlled vehicle and obstacles, the haptic interface enables the operator to perceive the distance information by the sense of touch. For the case of no joystick operation or no obstacles in the working area, we propose an origin control algorithm, which positions the joystick pole at the origin. The origin control algorithm prevents the false movement of the remote vehicles and provides the operator with a realistic force resisting the joystick pole's movement. The experiment results obtained under various scenarios exemplify the validity of the proposed haptic interface algorithm and the origin control algorithm.

Hyperledger Blockchain Design for Sharing, Spreading, and Protecting National Cybersecurity Information

  • Park, Dea-woo;Lee, Sang-hyeon
    • Journal of information and communication convergence engineering
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    • 제18권2호
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    • pp.94-99
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    • 2020
  • Real cyberterrors are invisible and difficult to identify. Even after a cyberattack, its origin and cause are difficult to determine. Cyberterrorism results in invisible cyberwars, and it is believed that World War IV will begin with a cyberwarfare. For national cybersecurity, information on cybersecurity must be collected, shared, and disseminated. In this study, we investigate a blockchain system designed based on the World Cybersecurity Agreement. National cybersecurity information is linked to the hyperledger blockchain system network through the National Cybersecurity Center. National cybersecurity information designs and uses a secure protocol for protection; further, it is collected, shared, and disseminated to treaty countries. National cybersecurity information is shared and spread by the hyperledger blockchain system, and it uses a cyberdefense system that responds to the cyberattacks and their origin. This paper serves as a policy and legislation guideline for forming a World Cybersecurity Agreement between countries.

A Study on Development of Video Navigation System with real-time GPS Information

  • Jang, Jin-Wook
    • 한국컴퓨터정보학회논문지
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    • 제23권8호
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    • pp.95-99
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    • 2018
  • This research is related to GPS(global positioning system) enabled device navigation service and consists of two parts. The first is the logic that records the route guidance video and records GPS information in time, and the second is the logic that outputs the created video data based on real time GPS. The recording logic first determines the origin and destination, records the video from the origin to the destination and it adjusts the speed of the image in a specific area so that the user can see it easily. And insert ancillary information and advertisements that can help guide the route. In the output logic, we provide navigation services using the video and GPS data tables we created, and it receives user's GPS information in real time and corrects it based on the recent user location to reduce errors. This provides local guidance services to people who lack language skills like foreigners.

3D-Distortion Based Rate Distortion Optimization for Video-Based Point Cloud Compression

  • Yihao Fu;Liquan Shen;Tianyi Chen
    • KSII Transactions on Internet and Information Systems (TIIS)
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    • 제17권2호
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    • pp.435-449
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    • 2023
  • The state-of-the-art video-based point cloud compression(V-PCC) has a high efficiency of compressing 3D point cloud by projecting points onto 2D images. These images are then padded and compressed by High-Efficiency Video Coding(HEVC). Pixels in padded 2D images are classified into three groups including origin pixels, padded pixels and unoccupied pixels. Origin pixels are generated from projection of 3D point cloud. Padded pixels and unoccupied pixels are generated by copying values from origin pixels during image padding. For padded pixels, they are reconstructed to 3D space during geometry reconstruction as well as origin pixels. For unoccupied pixels, they are not reconstructed. The rate distortion optimization(RDO) used in HEVC is mainly aimed at keeping the balance between video distortion and video bitrates. However, traditional RDO is unreliable for padded pixels and unoccupied pixels, which leads to significant waste of bits in geometry reconstruction. In this paper, we propose a new RDO scheme which takes 3D-Distortion into account instead of traditional video distortion for padded pixels and unoccupied pixels. Firstly, these pixels are classified based on the occupancy map. Secondly, different strategies are applied to these pixels to calculate their 3D-Distortions. Finally, the obtained 3D-Distortions replace the sum square error(SSE) during the full RDO process in intra prediction and inter prediction. The proposed method is applied to geometry frames. Experimental results show that the proposed algorithm achieves an average of 31.41% and 6.14% bitrate saving for D1 metric in Random Access setting and All Intra setting on geometry videos compared with V-PCC anchor.

An Empirical Study on the Effect of Internal FTA Utilization Factors on Export Performance

  • In-Seong Lee
    • Journal of Korea Trade
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    • 제27권3호
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    • pp.199-216
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    • 2023
  • Purpose - This study aims to identify the internal capabilities that export companies need to possess in order to utilize FTAs and to propose ways to expand their export performance through them. To achieve this goal, the study analyzed the internal factors that affect FTA utilization from a resource-based perspective, such as Origin Management Competency, Information Acquisition Competency, contract Management Competency, and Commitment to Export, based on prior research on corporate capabilities in the field of management and FTA-related research. The study ultimately aims to confirm whether a company's FTA utilization contributes to its export performance through the management and response to its internal factors for FTA utilization. Design/methodology - To achieve the research objective, this study conducted a literature review related to FTA utilization and identified the internal factors of companies that affect FTA by classifying them into Origin Management Competency, Information Acquisition Competency, contract Management Competency, and Commitment to Export Based on this, a final research model was developed, hypotheses were set through a preliminary study survey, and conclusions were drawn by analyzing the data of 312 companies. Findings - The empirical analysis results indicate that Origin Management Competency and Contract Management Competency have a positive impact on FTA utilization, while Information Acquisition Competency and Commitment to Export do not have a statistically significant impact on FTA utilization. Based on these findings, this study suggests measures for efficient FTA utilization for companies that want to utilize FTAs. Additionally, FTA utilization has a positive impact on export performance. In other words, the extent to which companies utilize the signed agreements has a positive impact on their performance. Based on these results, this study identifies the characteristics of companies that want to utilize FTAs and proposes measures for future efficient FTA utilization. Originality/value - This study has confirmed that in order for companies to utilize FTAs, they must meet the requirements of the FTA. To this end, the study has concluded that it is important to manage and address internal factors such as Origin Management Competency, Information Acquisition Competency, contract Management Competency, and Commitment to Export to increase FTA utilization. Based on these results, it can be confirmed that it is essential for companies to have an understanding and management of the internal factors that satisfy the requirements of the FTA in order to utilize the FTA.

공간정보를 활용한 한-미 교역액의 기종점 분석 (The Origin-Destination analysis of KORUS trade volume using spatial information)

  • 강효원
    • 통상정보연구
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    • 제18권3호
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    • pp.47-72
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    • 2016
  • 그 동안 우리나라 정부의 통상분야에 대한 관심은 한 해 동안 교역활동의 흐름을 통해 최종적으로 산출된 숫자의 적(赤)과 흑(黑)이 의미하는 부호(+, -)에만 관심을 가졌다. 이제는 교역활동의 결과를 대리하는 그 숫자가 의미하는 숨어있는 공간정보에 주목할 때이다. 본 연구는 한미 양국이 제공하는 교역액 데이터의 공간정보를 활용하였다. 2003년부터 2015년까지 12년간의 교역데이터의 분석결과 분해가 가능한 공간정보를 교역물품 발생지, 경유지 그리고 최종목적지로 구분하였으며, 연구결과는 첫째, 일반적으로 대미 수출을 뜻하는 한국발 미국향 화물에 대한 공간정보의 특성을 2003년과 비교했을 때 2015년에는 발생지 측면에서 탈수도권화 현상이 나타났다. 국내 경유지 측면에서는 해상 및 항공화물의 비중이 각각 약76%, 23%로 분석되었다. 미국 경유지의 경우 미서부 항만의 경유비율이 줄어들고 있었으며, 상대적으로 미남부 항만의 경유는 증가하고 있었다. 화물의 최종목적지는 캘리포니아 주로의 수출비중이 가장 높았으나, 텍사스와 조지아 주의 화물성장세가 증대되고 있음을 확인하였다. 둘째, 일반적으로 대미 수입을 뜻하는 미국발 한국향 화물의 공간정보특성을 살펴보면 발생지 측면에서는 캘리포니아와 텍사스 주의 비중이 절대적으로 높은 편이다. 미국 내 경유지인 항만과 공항의 경유비율은 약60%, 40%의 비율로 항공화물의 비중이 높은 것으로 분석되었다. 국내의 경유지 중 공항은 인천공항이 절대적이었으며, 항만의 경우는 부산항의 점유율은 68.2%를 기록하여 12년 전과 큰 변화는 없어 영향력이 지속되고 있음을 알 수 있었다. 반면 평택당진항과 인천항과 같이 수도권에 인접한 항만의 성장세가 확인되었다. 본 연구는 12년간 한국과 미국의 교역액 데이터의 공간정보를 분해하여 양국의 교역구조를 발생지, 경유지, 목적지로 구조화하는데 목적이 있다.

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