• Title/Summary/Keyword: 마스터

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Wireless Power Harvesting Techniques to Improve Time to Fly of Drone (무인항공기 비행시간 향상을 위한 무선 전력획득 기술)

  • Nam, Kyu-hyun;Jung, Won-jae;Jang, Jong-eun;Chae, Hyung-il;Park, Jun-seok
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.41 no.11
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    • pp.1574-1579
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    • 2016
  • This paper presents a self-powered sensor-node scheme using a RF wireless power harvesting techniques for improve drone time of flight. Sensor-node that is proposed is turned when two conditions satisfy: The one is input RF ID data from master-node should be same with sensor-node's ID, and the other one is RF wireless power harvesting system is turned on by hysteresis switch. In this paper, master-node's output is 26 dBm at 263 MHz. Maximum RF to DC power conversion efficiency is about 55% at 4-6 dBm input power condition (2 meter from master-node). The maximum RF wireless power harvesting range is about 13 meter form master-node. And power consumption of the sensor-node's load elements such as transmitter, MCU and temperature sensors is approximately average 15 mA at 5.0 V for 10 msec.

Skinny Smudge Tool (스키니 스머지 툴)

  • Woo, Seung-Beom;Kwak, No-Yoon
    • 한국HCI학회:학술대회논문집
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    • 2009.02a
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    • pp.111-115
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    • 2009
  • This paper is related to a skinny smudge tool based on the image segmentation for a master shape. The smudge tool is the popular graphic tool embedded in Adobe Photoshop. The smudge tool is used to smear paint on your canvas. The effect is much like finger painting. You can use the smudge tool by clicking on the smudge icon and clicking on the canvas and while holding the mouse button down, dragging in the direction you want to smudge. A disadvantage of previous smudge tool is to also smear pixels in the undesired region according to generating the target image as blending all pixels in a diameter of the master. In this paper to reduce the disadvantage, the skinny smudge tool based on the image segmentation for a master shape is proposed. The proposed skinny smudge tool has the advantage of applying the smudge effect to the desired regions regardless of the background as the master shape adhered closely to the contour shape is extracted by color image segmentation.

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8.3 Gbps pipelined LEA Crypto-Processor Supporting ECB/CTR Modes of operation (ECB/CTR 운영모드를 지원하는 8.3 Gbps 파이프라인 LEA 암호/복호 프로세서)

  • Sung, Mi-Ji;Shin, Kyung-Wook
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.20 no.12
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    • pp.2333-2340
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    • 2016
  • A LEA (Lightweight Encryption Algorithm) crypto-processor was designed, which supports three master key lengths of 128/ 192/256-bit, ECB and CTR modes of operation. To achieve high throughput rate, the round transformation block was designed with 128 bits datapath and a pipelined structure of 16 stages. Encryption/decryption is carried out through 12/14/16 pipelined stages according to the master key length, and each pipelined stage performs round transformation twice. The key scheduler block was optimized to share hardware resources that are required for encryption, decryption, and three master key lengths. The round keys generated by key scheduler are stored in 32 round key registers, and are repeatedly used in round transformation until master key is updated. The pipelined LEA processor was verified by FPGA implementation, and the estimated performance is about 8.3 Gbps at the maximum clock frequency of 130 MHz.

A Study on the Improvement of the Management Plan of City Master Planning as ODA Project (ODA 사업으로서 도시 마스터플랜 수립 사업의운영방식 개선에 관한 연구)

  • Kim, Yong-Jin;Kim, Seong-Hee
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.16 no.4
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    • pp.2799-2806
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    • 2015
  • This study aims to find out the better management plan for city master plannning as an ODA to accomplish the economic effect. For this study, the "Hai Phong New Town Development Project" and the "Modification of Hue City's Master Plan" were studied. The result of the case study shows that there was difference between the two projects which was the status of following projects. While those two projects were highly acclaimed, only Hue project had several projects. This is because of the understanding degree on ODA project of participants, the distinct characteristics of the recipient country; Vietnamese local and central government, and the difference of each project's main purpose. And the result of FGI shows that to accomplish economic effects of master planning project as ODA, the enthusiastic approach to find out following project from the beginning step of the master planning, the experience of project manager on ODA, the close association with the recipient country, and the positive support from the Koica especially, the local office were crucial.

The Master-Slave structure and Synchronization Method for a higher-Capacity Lighting Performance (대용량 조명연출을 위한 마스터-슬레이브 구조와 동기화 방안)

  • Choi, Seong-Cheol;Lee, Won-Ho;Moon, Byung-Koo
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.11 no.7
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    • pp.2559-2564
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    • 2010
  • The indoor and outdoor lighting industry has become the bigger and more systemized using the semiconductor LED with each control R(Red), G(Green), B(Blue). The communication standard DMX512(ANSI E1.11) protocol of it can control and perform max. 512 lightings, especially 170 lightings in 24 bit true color. As the performance of below 100 lightings is distinguished small-size, this paper proposes a bigger capacity lighting performance above 1,000 using connection to 1 master to 32 slaves. Also, this paper proposes the synchronization method in order to accomplish a designed performance. In proposed method, the master sends the synchronization signal to slaves every 400ms. Slaves receive this signal and use to initialize the timer becoming the basis of DMX512 output. The example of the developed products using proposed method and the operation is introduced.

Analysis of Link Stability Based on Zone Master for Wireless Networks (무선네트워크에서 존 마스터 기반의 링크 안정성 해석)

  • Wen, Zheng-Zhu;Kim, Jeong-Ho
    • KIPS Transactions on Computer and Communication Systems
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    • v.8 no.3
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    • pp.73-78
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    • 2019
  • Due to frequent topology changes in wireless networks, inter-node link disconnection and path re-establishment occur, causing problems such as overloading control messages in the network. In this paper, to solve the problems such as link disconnection and control message overload, we perform path setup in three steps of the neighbor node discovery process, the route discovery process, and the route management process in the wireless network environment. The link stability value is calculated using the information of the routing table. Then, when the zone master monitors the calculated link value and becomes less than the threshold value, it predicts the link disconnection and performs the path reset to the corresponding transmitting and receiving node. The proposed scheme shows a performance improvement over the existing OLSR protocol in terms of data throughput, average path setup time, and data throughput depending on the speed of the mobile node as the number of mobile nodes changes.

A Study on the Promotional Media Strategy of Non-face-to-face and Martial Arts Events

  • Kim, Bo-kyung
    • Journal of the Korea Society of Computer and Information
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    • v.25 no.12
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    • pp.271-278
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    • 2020
  • This study looked at the World Martial Arts Mastership's 'non-face promotional media strategies and methods' after the Corona-19 fandom, and found out if they could be applied to other sports events. As a method of research, the promotional media strategy of martial arts mastership was divided into types and in-depth interviews with media agents were conducted. According to the study, hosting an online martial arts competition, building an untact convention platform, and a base education facility can be a successful contest with budget support. Martial arts branding, popularization and industrialization can be a new attempt if ideas and execution personnel are sufficient. If IT technology and Chungbuk martial arts infrastructure are combined, they will be able to pioneer a new model called 'non-face-to-face-to K-sports'.

A Design on The Zone Master Platform based on IIoT communication for Smart Factory Digital Twin (스마트 팩토리 디지털 트윈(Digital Twin)을 위한 IIoT 통신 기반 ZMP(Zone Master Platform) 설계)

  • Park, Seon-Hui;Bae, Jong-Hwan
    • Journal of Internet of Things and Convergence
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    • v.6 no.4
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    • pp.81-87
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    • 2020
  • This paper creates a standard node for acquiring sensor data from various industrial sensors (IoT/non-IoT) for the establishment of Smart Factory Digital Twin, and provides inter-compatible data by linking zones by group/process to secure data stability and to ensure the digital twin (Digital Twin) of Smart Factory. The process of the Zone Master platform contains interface specifications to define sensor objects and how sensor interactions between independent systems are performed and carries out individual policies for unique data exchange rules. The interface for execution control of the Zone Master Platform processor provides system management, declaration management for public-subscribe, object management for registering and communicating status information of sensor objects, ownership management for property ownership sharing, time management for data synchronization, and data distribution management for Route information on data exchange.

A Study of Masterplot of Disaster Narrative between Korea, the US and Japan (한·미·일 재난 서사의 마스터플롯 비교 연구)

  • Park, In-Seong
    • Journal of Popular Narrative
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    • v.26 no.2
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    • pp.39-85
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    • 2020
  • This paper examines the aspects of disaster narrative, which makes the most of the concept of 'masterplot' as a narrative simulation to solve problems. By analyzing and comparing the remnants of 'masterplots' operating in the disaster narratives of Korea, the United States, and Japan, the differences between each country and social community problem recognition and resolution will be discussed. Disaster narrative is the most suitable genre for applying the 'masterplot' toward community problem solving in today's global risk society, and the problem-solving method has cognitive differences for each community. First, in the case of American disaster narratives, civilian experts' response to natural disasters tracks the changes of heroes in today's 'Marvel Comic Universe' (MCU). Compared to the past, the close relationship between heroism and nationalism has been reduced, but the state remains functional even if it is bolstered by the heroes' voluntary cooperation and reflection ability. On the other hand, in Korea's disaster narratives, the disappearance of the country and paralysis of the function are foregrounded. In order to fill the void, a new family narrative occurs, consisting of a righteous army or people abandoned by the state. Korea's disaster narratives are sensitive to changes after the disaster, and the nation's recovery never returns to normal after the disaster. Finally, Japan's disaster narratives are defensive and neurotic. A fully state-led bureaucratic system depicts an obsessive nationalism that seeks to control all disasters, or even counteracts anti-heroic individuals who reject voluntary sacrifices and even abandon disaster conditions This paper was able to diagnose the impact and value of a 'masterplot' today by comparing a series of 'masterplots' and their variations and uses. In a time when the understanding and utilization of 'masterplots' are becoming more and more important in today's world where Over-the top(OTT) services are being provided worldwide, this paper attempt could be a fragmentary model for the distribution and sharing of global stories.

Fabrication of Nanoscale Reusable Quartz Master for Nano Injection Molding Process (재사용 가능한 100nm급 패턴의 퀄츠 마스터 제작 및 퀄츠 마스터를 사용한 사출성형실험)

  • Choi Doo-Sun;Lee Joon-Hyoung;Yoo Yeong-Eun;Je Tae-Jin;Whang Kyung-Hyun;Seo Young Ho
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.29 no.2 s.233
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    • pp.228-231
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    • 2005
  • In this paper, we present reusable quartz master fabricated by electron-beam lithography and dry etching process of quartz, and results of injection molding based on the reusable quartz master for the manufacturing of nano-scale information media. Since patterned structures of photoresist can be easily damaged by separation (demolding) process of nickel stamper and master, a master with photoresist cannot be reused in stamper fabrication process. In this work, we have made it possible of the repeated use of master by directly patterning on quart in nickel stamper fabrication process. We have designed and fabricated four different specimens including 100nm, 140nm 200nm and 400nm pit patterns. In addition, both intaglio and embossed carving patterns are fabricated for each specimen. In the preliminary test of injection molding, we have fabricated polycarbonate patterns with varying mold temperature. We have experimentally verified the fabrication process of the reusable quart master and possibility of quartz master as direct stamper.