• Title/Summary/Keyword: grasp

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A Comparative Study of the Diachronic Change in the Transmission Rate of Broadcast Messages (방송 메시지 전달 속도의 통시적 비교에 관한 연구: 라디오뉴스 전달 속도 분석을 중심으로)

  • Park, Kyung-Hee
    • MALSORI
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    • no.64
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    • pp.15-37
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    • 2007
  • The purpose of this paper is to examine the change of the times on the transmission rate of broadcast message. In order to find out the research results, I collected past recorded news tapes and selected 22 radio news out from era of Japanese Imperialism, 1950's, 1960's and contemporary age. Next I measured each announcer's reading rate, and compared change on news-reading rate between present and past approximately 50 years ago. The results of study with such procedures and methods are as follows : the average reporting rate of newscasters in each era is different. From these results, we can easily grasp diachronic change in the transmission rate of broadcast message. Namely, the results show us that present announcers read news faster than the group of past era of Japanese Imperialism by 68%.

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A decision factor for service quality of mobile communication and customer satisfaction;Focus on mobile content services (이동통신 서비스품질의 결정요인과 고객만족;모바일 콘텐츠 서비스를 중심으로)

  • Kim, Bum-Seok;Cho, Jai-Rip
    • Proceedings of the Korean Society for Quality Management Conference
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    • 2007.04a
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    • pp.83-88
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    • 2007
  • The demand for mobile content has been increased dramatically upon proliferation of usages of mobile devices and the development of various contents. In addition, mobile services to satisfy various desires of these users spread rapidly into our daily lives. So, companies need to grasp what values the users think most important among the mobile content services in order to develop successful goods and services. Therefore, this paper will analyze what decision factors the service quality of mobile content of theses mobile communication services has and how they influence to customer satisfaction, and it will give suggestions for improving content qualities

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A Study on the Characteristics Improvement of Fluid Power Actuator Using Adaptive Control (적응제어를 이용한 유압 액츄에이터의 특성개선에 관한 연구)

  • 염만오;윤일로
    • Journal of the Korean Society for Precision Engineering
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    • v.21 no.1
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    • pp.124-132
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    • 2004
  • A hydraulic system is difficult to keep the performance due to non-linearity, load pressure which changes according to working condition and system parameter variation, the requirement of control algorithm has been risen in order to satisfy them. An adaptive control is a control method which is suggested to achieve a control object though plant characteristics change. In spite of the case that plant characteristics and the degree of variation are difficult to grasp, adaptive control can keep the characteristics of closed-loop system regularly. In this study GMVAC(generalized minimum variance adaptive control) combined with output error feedback is proposed in order to solve problems of non-minimum phase, vibration and overshoot in initial response of the plant. The control performance according to the variation of characteristics of the plant is evaluated by changing the supply pressure only.

A Study on Impact analysis of breaking the pine board (태권도 격파시 인체 충격력에 대한 연구)

  • Lee J.W.;Lee Y.S.;Choei Y.J.;Lee S.H.;Lee H.S.
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 2005.06a
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    • pp.1948-1953
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    • 2005
  • The Teakwondo is composed of the breaking, competition and poomsea. In the hand breaking, the breaking impact of human is affected by the breaking posture. In this paper, impact analysis of the human model for breaking posture is carried out. The LifeMOD is used in breaking modeling and simulation. The simulation model createsthe human model to hit and to grasp a pine board. For the breaking, the poomsea motion of the hand joint inputs the splines pass condition. As the results, the reaction of human joint is presented

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Design and fabrication of robot′s finger 3-axis force sensor for grasping an unknown object (미지물체를 잡기 위한 로봇 손가락의 3축 힘감지센서 설계 및 제작)

  • 김갑순
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 2002.05a
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    • pp.229-232
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    • 2002
  • This paper describes the development of robot's finger 3-axis force sensor that detects the Fx, Fy, and Fz simultaneously fur stably grasping an unknown object. In order to safely grasp an unknown object using the robot's fingers, they should detect the force of gripping direction and the force of gravity direction, and perform the force control using the detected farces. The 3-axis force sensor that detects the Fx, Fy, and Fz simultaneously should be used for accurately detecting the weight of an unknown object of gravity direction. Thus, in this paper, robot's finger for stably grasping an unknown object is developed. And, the 3-axis farce sensor that detects the Fx, Fy, and Fz simultaneously fur constructing a robot's finger is newly modeled using several parallel-plate beams, and is fabricated. Also, it is calibrated, and evaluated.

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Development of Simple Simulation by Changing the Stroke of Cylinder for a Oscillation (모의실험장치에서의 기계적인 동요에 대한 단순모사 장치개발)

  • Seol, Sang-Seok;Chung, Won-Jee;Jung, Dong-Won
    • Journal of the Korean Society for Precision Engineering
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    • v.33 no.2
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    • pp.89-94
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    • 2016
  • Equipments to influence by external force have to take effect mechanical oscillation. These equipments regardless of the movement on the external force such as roll, pitch and heave etc, worked to keep the height of tote are required for activeness and needed a device as equipment's fluctuation for rapidly compensation. Because the actual development of these devices is difficult to cost-effectively, we were developed to compensation simulator scaled down 1/50. In this paper, we were studying kinematic characteristics, designed the simulator to grasp the point and manufactured. This paper was analyzed for confirming the superiority of compensation simulator and set up 50 ton crane in practice.

Energy Consumption Monitoring System for Each Axis of Machining Center (머시닝 센터의 각 축별 에너지 모니터링 시스템)

  • Kim, Jae Hyeok;Nam, Sung Ho;Lee, Dong Yoon
    • Journal of the Korean Society for Precision Engineering
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    • v.32 no.4
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    • pp.339-344
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    • 2015
  • Machine tools are one of the energy-intensive equipment used in the manufacturing industry. The importance of energy has increased and the machine tools are required to be energy-efficient. The servo systems of the machine tool consume electrical power to rotate a spindle and to feed a tool during machining. Servo system consumes a lot of energy when the machine tool is operated. The energy consumption pattern of each axis needs to be investigated in order to optimize the machining process with regard to energy cost. In this paper, an energy monitoring system is developed considering various measuring points of servo system in order to grasp the energy consumption pattern of each axis.

Prospects for the Management of Shanghai Harbour

  • He Yegang
    • Proceedings of the KOR-KST Conference
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    • 1993.07a
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    • pp.99-105
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    • 1993
  • This Article analyses the present situation of Shanghai Harbour and the Harbour's important role in the development of chinese economy. The article forecasts that the yearly tonnage turnover of the port will reach about 200 million tons in the year of 2000, possibly reach to 270--300 million tons by the end of 2020. it also forecasts that the container handling capacity of the port will be 2 million TEUS in 2000 and 6 million TEUS in 2020 respectively. In order to keep pace with the present situation of opening up and developing Pudong new area, this article suggests that the strategic target of the management and development of Shanghai Harbour should be : grasp the opportunity of opening up and developing Pudong, take the building of the deep-waterway port as the main task, which can accept the third or fourth generation international container ships, bring into full play the traditional advantages the Harbour has, unfold the businesses in other fields, participate in the marketing competition, speed up the development of the Harbour itself, make efferts to build Shanghai Harbour into a port-industry-trade-transportation integral modernized international deep-water key port.

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A Study on the Evaluation of an existing Prediction Model on the Rail Traffic Noise (철도신설지역에서의 소음예측식 연구 -국립환경과학원 철도소음예측식과 독일의 shall03을 중심으로)

  • Chun, Hyung-Jun;Chang, Seo-Il
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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    • 2006.11a
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    • pp.751-756
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    • 2006
  • The purpose of this study is to grasp present condition of railroad noise, and forecast noise and presented basis data that ready noise reduction countermeasure. This study has predicted the level of noise reduction according to barrier by considering the characteristics of the cause of noise. These result drew using 'Prediction Model of NIER' and 'Shall03 of Germany'. This paper found important factors in railroad noise using this results and become forward syudy direction.

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Cabin Noise Reduction of wheel Loader through the Shape Optimization of Tail-Pipe (테일 파이프 형상 개선을 통한 휠로더 캐빈 소음 저감 연구)

  • Ko, Kyung-Eun;Joo, Won-Ho;Kim, Dong-Hae;Bae, Jong-Gug
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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    • 2006.11a
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    • pp.686-689
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    • 2006
  • In a wheel loader, the tail-pipe is installed at the exhaust tube of muffler for the reduction of exhaust noise and the cooling of engine room however, the cabin noise level can be largely increased due to the tail-pipe. In this paper, to grasp and reduce the cabin noise, a series of noise and vibration tests were carried out in addition to numerical simulations. As a result, the transmission path of exhaust noise toward the cabin was exactly identified and the improved shape of tail pipe, that can reduce the cabin noise, was derived through various numerical simulations and real tests.

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