• Title/Summary/Keyword: position regulation

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The Regulation of Market-Dominating Enterprises in Media Industries (미디어산업에서의 시장지배적지위 남용행위 분석 -시장획정 및 시장지배력 판단과 남용행위 유형분류를 중심으로-)

  • Oh, Jeong-Ho
    • Korean journal of communication and information
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    • v.44
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    • pp.180-222
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    • 2008
  • This study briefly examines the regulation of market-dominating enterprises in terms of market definition, judgement about market dominance, judgement about abuse of market-dominant position, and types of abuse of market-dominant position. This study explores Korea Fair Trade Commission's judgemental cases regarding the prohibition of abuse of market-dominant positions under 'Korea Monopoly Regulation and Fair Trade Act' and focuses on 21 cases related with Korean media industry. Based on this case analysis and literature review, this study derives major issues, problems, and possible alternatives in the regulation of market-dominating enterprises in media markets. And this study suggests implications about monopoly regulation and fair competition policy of Korean media industry.

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Simplified Nonlinear Control for Planar Motor based on Singular Perturbation Theory (특이섭동이론을 기반으로한 평판모터의 비선형 제어)

  • Seo, HyungDuk;Shin, Donghoon;Lee, Youngwoo;Chung, Chung Choo
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.64 no.2
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    • pp.289-296
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    • 2015
  • In this paper, we propose the nonlinear control based on singular perturbation theory for position tracking and yaw regulation of planar motor. Singular perturbation theory is characterized by the existence of slow and fast transients in the system dynamics. The proposed method consists of auxiliary control to decouple error dynamics. We develop model reduction with control input. Also, we derIve decoupled error dynamics with auxiliary input. The controller is designed in order to guarantee the desired position and yaw regulation without current feedback or estimation. Simulation results validate the effect of proposed method.

A Debate on Regulatory Framework for Online Dispute Resolution (ODR 관련 규정체제에 관한 논의)

  • Kim, Sun-Kwang
    • International Commerce and Information Review
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    • v.9 no.1
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    • pp.277-295
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    • 2007
  • This paper presents the ODR phenomenon with a specific focus on regulatory problems. It argues that the current regulatory framework for online dispute resolution is, to a large extent, defective. Existing deficiencies result not only from a lack of comprehensive ODR law, but also from the weakness of the other modalities of regulation : norms and market. The current today's approach to regulating ODR has been unsuccessful, and it is time to re-examine that position. I would like to say that suggesting details of the optimal ODR regulatory framework is beyond the scope of this paper. From a broader perspective, the field of ODR seems to be not sufficiently regulated. Neither by law, nor by the restrains set by other norms or market. Given the current weakness of the modalities of regulation, online dispute resolution requires greater institutional and international support. It appears that adoption of internationally harmonized ODR law would not hamper the development of norms and market, but rather support their proper growth. As a result, the co-regulation approach recommended in this paper is different from both traditional state-oriented models of regulation and self-regulatory systems. Arguably, this co-regulation approach is the optimal model for regulation of online dispute resolution under current circumstances.

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Control of a Rotary Double Inverted Pendulum using LQR Control Algorithm (LQR 제어 알고리즘을 이용한 원운동형 2축 도립 진자의 제어)

  • Hwang, Eon-Du;Park, Min-Ho;Lee, Sang-Hyuk
    • Proceedings of the KIEE Conference
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    • 2001.07d
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    • pp.2240-2242
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    • 2001
  • A rotary double inverted pendulum, the nonlinear system has a regulation problem. In this paper, we linearize the nonlinear system at the upright equilibrium position. The linearized system can be expressed in state space. To maintain the upright position, we design a feedback controller using LQR(Linear Quadratic Regulator) algorithm. Then we simulate the system with third-order Adams Bashforth Moulton Method. The simulated result shows that the applied algorithm is effective for the regulation problem.

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Fostering growth: The impact of STEM PBL on students' self-regulation and motivation

  • Hyunkyung Kwon;Robert M. Capraro;Yujin Lee;Ashley Williams
    • Research in Mathematical Education
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    • v.27 no.1
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    • pp.111-127
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    • 2024
  • There is an increasing concern in the United States regarding the workforce's ability to maintain a competitive position in the global economy. This has led to an increased interest in effective science, technology, engineering, and mathematics (STEM) education. The purpose of this study was to investigate the effect of STEM project-based learning (PBL) on students' self-regulation and motivation to learn. Secondary students (n = 60) participated in a STEM summer camp in which STEM PBL was utilized. Results showed that students increased their self-regulation skills (t = 2.83, df = 59, p = .004) and motivation (t = 2.25, df = 59, p =.004), with Cohen's d effect sizes of 0.395 and 0.404, respectively. Student-centered learning and peer collaboration while solving real-world problems were likely the greatest contributing factors to the outcomes. Educators should utilize the results to provide opportunities for students to experience STEM PBL.

Circulatory and Respiratory Responses to Postural Changes (체위 변화에 수반되는 순환 및 호흡반응)

  • Chae, E-Up;Lee, Suck-Kang;Bae, Sung-Ho
    • The Korean Journal of Physiology
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    • v.7 no.1
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    • pp.13-21
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    • 1973
  • An attempt was made to study circulatory and respiratory responses to the passive tilt. Anesthetized dogs were tilted from horizontal to upright $(+90^{\circ})$ and head down $(-90^{\circ})$ position. The arterial blood pressure was decreased in the upright position and was decreased slightly in the head down position comparing to that in the horizontal position. Cardiac index also decreased in the both upright and head down positions. The total systemic vascular resistance was slightly increased in the upright position and was markedly increased in the head down position. The mean pulmonary arterial pressure was significantly decreased in the both upright and head down positions. The total pulmonary vascular resistance was decreased in the both upright and head down positions. Oxygen consumption was slightly decreased in the upright position, whereas it was slightly increased in the head down position. The A-V $O_2$ difference (vol. %) was slightly increased in the upright position and increased in the head down position. From the above results, process of the circulatory compensation to the gravity in the Passive tilting test was discussed. Neuronal cardiovascular regulation to the gravity and tile adaptation of capacitance vessles to hydrostatic stress and oxygen consumption concerning anoxic endurance of the brain were also discussed.

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Simple Neuro-Controllers for Field-Oriented Induction Motor Servo Drives

  • Fayez F. M.;Sousy, E-I;M. M. Salem
    • Journal of Power Electronics
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    • v.4 no.1
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    • pp.28-38
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    • 2004
  • In this paper, the position control of a detuned indirect field oriented control (IFOC) induction motor drive is studied. A proposed Simple-Neuro-Controllers (SNCs) are designed and analyzed to achieve high-dynamic performance both in the position command tracking and load regulation characteristics for robotic applications. The proposed SNCs are trained on-line based on the back propagation algorithm with a modified error function. Four SNCs are developed for position, speed and d-q axes stator currents respectively. Also, a synchronous proportional plus integral-derivative (PI-D) two-degree-of-freedom (2DOF) position controller and PI-D speed controller are designed for an ideal IFOC induction motor drive with the desired dynamic response. The performance of the proposed SNCs and synchronous PI-D 2DOF position controllers for detuned field oriented induction motor servo drive is investigated. Simulation results show that the proposed SNCs controllers provide high-performance dynamic characteristics which are robust with regard to motor parameter variations and external load disturbance. Furthermore, comparing the SNC position controller with the synchronous PI-D 2DOF position controller demonstrates the superiority of the proposed SNCs controllers due to attain a robust control performance for IFOC induction motor servo drive system.

A Study on the Direction for Revision of Korea Shipping Act and Monopoly Regulation and Fair Trade Act (선화주 균형발전을 위한 해운법 및 독점규제법의 개정방향에 관한 연구)

  • Park, Kwang-So
    • THE INTERNATIONAL COMMERCE & LAW REVIEW
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    • v.49
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    • pp.213-236
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    • 2011
  • Korea Shipping Act admits shipping conferences' joint actions like rate agreement, sailing agreement in some degree for development of shipping transport industries for decades. Meanwhile, EU has prohibited all kinds of shipping conferences' joint actions since October 2008, and many advanced countries also have similar position on shipping conference. The balance development between shippers and ship owners is very important in terms of national economic growth. So it is appropriate time to revise related laws such as Shipping Act and Monopoly Regulation and Fair Trade Act. First, It is direction for revision of Korean Shipping Act. The act has to define precisely the criteria of "unfairness" in case of admitting of shipping conferences' joint actions. Shipping conferences have a conference with shipper or shipper's delegation substantially on freight and transport conditions and so on. Second, It is direction for revision of Monopoly Regulation and Fair Trade Act. The fair trade commission has to perform fair roles between shippers and ship owners. The judgement of fairness has to confirm according to the spirit of not Korea Shipping Act but Korea Monopoly Regulation and Fair Trade Act itself.

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Displacement-Type Web Position Control of Cold Mills Using QFT (QFT를 이용한 냉간 압연시스템의 변위유도형 웹 위치제어)

  • Jeong, Jae-Hyo;Kim, Jong-Sik;Park, Jeon-Soo
    • Journal of the Korean Society for Precision Engineering
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    • v.18 no.9
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    • pp.147-155
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    • 2001
  • A new displacement type web position control system for cold mills using QFT is presented. The control system features an inner-outer cascaded system in which the inner loop provides the position tracking control of the hydraulic system and the outer loop provides the position regulation control of the web. By the sensitivity analysis and computer simulation, it is verified that the proposed control system has better robust stability and performance than the conventional control system.

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The Speed and Position Sensorless Control of Switched Reluctance Motor using Binary Observer

  • Yang, Lee-Woo;Kim, Young-Cho;Choi, Jung-Soo;Kim, Young-Seok
    • Proceedings of the KIPE Conference
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    • 1998.10a
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    • pp.736-741
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    • 1998
  • It is well known that an encoder or a resolver is necessary to obtain the position data for speed or position control Generally utilized speed sensors are mal-affected by the EMI, dusty, and high temperature surroundings. Therefore, the speed and position sensorless controls using observers have been studied widely. In this paper, the binary observer which is composed of two feedback regulation loops to control the speed of SRM(Switched Reluctance Motor) is applied. One loop compensates the control input directly like the sliding mode control, and the other one compensates the system parameters indirectly. This observer is constructed on the foundation of variable structure control on the foundation of variable structure control theory and has the inertial term for the varying parameter. The validities of this proposed method is proved by experiments.

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