• Title/Summary/Keyword: Frequency Regulation

Search Result 637, Processing Time 0.03 seconds

The Quality of After-School Programs Focused on Artistic-Physical Activities and Children′s Emotional Regulation and Social Competence (예체능 방과후 교육프로그램의 질과 아동의 정서조절 및 사회적 능력)

  • 전은경;최보가
    • Journal of the Korean Home Economics Association
    • /
    • v.42 no.8
    • /
    • pp.33-48
    • /
    • 2004
  • This study investigated the quality of after-school programs focused on artistic-physical activities, children's emotional regulation and social competence. The subjects were 224 elementary school children (1st through 6th grades) and 41 teachers. The measures were questionnaire(after-school activities), Assessment Profile for Early Childhood Programs(school-age), the Emotional Regulation Scale. and the Social Competency Scale. The data were analyzed by Cronbach's a, frequency, percentile, mean, and t-test. The results indicated that emotional regulation and, social competence were significantly different according to the quality of after-school programs: Children in a higher group of curriculum quality and interaction with teacher had better emotional regulation than did children in a lower group. Children in a higher group of curriculum quality and scheduling had better social competence(leadership and competence) than did children in a lower group.

The Effects of the Emotion Regulation Strategy to the Disgust Stimulus on Facial Expression and Emotional Experience (혐오자극에 대한 정서조절전략이 얼굴표정 및 정서경험에 미치는 영향)

  • Jang, Sung-Lee;Lee, Jang-Han
    • Korean Journal of Health Psychology
    • /
    • v.15 no.3
    • /
    • pp.483-498
    • /
    • 2010
  • This study is to examine the effects of emotion regulation strategies in facial expressions and emotional experiences, based on the facial expressions of groups, using antecedent- and response- focused regulation. 50 female undergraduate students were instructed to use different emotion regulation strategies during the viewing of a disgust inducing film. While watching, their facial expressions and emotional experiences were measured. As a result, participants showed the highest frequency of action units related to disgust in the EG(expression group), and they reported in the following order of DG(expressive dissonance group), CG(cognitive reappraisal group), and SG(expressive suppression group). Also, the upper region of the face reflected real emotions. In this region, the frequency of action units related to disgust were lower in the CG than in the EG or DG. The results of the PANAS indicated the largest decrease of positive emotions reported in the DG, but an increase of positive emotions reported in the CG. This study suggests that cognitive reappraisal to an event is a more functional emotion regulation strategy compared to other strategies related to facial expression and emotional experience that affect emotion regulation strategies.

Provision of Two-area Automatic Generation Control by Demand-side Electric Vehicle Battery Swapping Stations

  • Xie, Pingping;Shi, Dongyuan;Li, Yinhong
    • Journal of Electrical Engineering and Technology
    • /
    • v.11 no.2
    • /
    • pp.300-308
    • /
    • 2016
  • Application of demand-side resources to automatic generation control (AGC) has a great significance for improving the dynamic control performance of power system frequency regulation. This paper investigates the possibility of providing regulation services by demand-side energy storage in electric vehicle battery swapping stations (BSS). An interaction framework, namely station-to-grid (S2G), is presented to integrate BSS energy storage into power grid for giving benefits to frequency regulation. The BSS can be regarded as a lumped battery energy storage station through S2G framework. A supplementary AGC method using demand-side BSS energy storage is developed considering the vehicle user demand of battery swapping. The effects to the AGC performance are evaluated through simulations by using a two-area interconnected power grid model with step and random load disturbance. The results show that the demand-side BSS can significantly suppress the frequency deviation and tie-line power fluctuations.

Study on Establishing Investment Mathematical Models for Each Application ESS Optimal Capacity in Nationwide Perspective (국가적 관점에서 각 용도별 ESS 적정용량 산정을 위한 투자수리모델 수립에 관한 연구)

  • Kim, Jung-Hoon;Youn, Seok-Min
    • The Transactions of The Korean Institute of Electrical Engineers
    • /
    • v.65 no.6
    • /
    • pp.979-986
    • /
    • 2016
  • At present, electric power industry around the world are being gradually changed to a new paradigm, such as electrical energy storage system, the wireless power transmission. Demand for ESS, the core technology of the new paradigm, has been growing worldwide. However, it is essential to estimate the optimal capacity of ESS facilities for frequency regulation because the benefit would be saturated in accordance with the investment moment and the increase of total invested capacity of ESS facilities. Hence, in this paper, the annual optimal mathematical investment model is proposed to estimate the optimal capacity and to establish investment plan of ESS facility for frequency regulation. The optimal mathematical investment model is newly established for each season, because the construction period is short and the operation effect for the load by seasons is different unlike previous the mathematical investment model. Additionally, the marginal operating cost is found by new mathematical operation model considering no-load cost and start-up cost as step functions improving the previous mathematical operation model. ESS optimal capacity is established by use value in use iterative methods. In this case, ESS facilities cost is used in terms of the value of the beginning of the year.

domestic implementation of international rules regarding the orbit for satellite broadcasting (방송용 위성궤도에 대한 국제규범의 국내이행에 관한 연구)

  • Shin, Hong-Kyun
    • The Korean Journal of Air & Space Law and Policy
    • /
    • v.21 no.1
    • /
    • pp.191-214
    • /
    • 2006
  • The right to the spectrum frequency and orbit is required for the broadcasting by satellite, whether the broadcaster might be given any license or authorization for the broadcasting. The reason is that the ITU Convention and Radio Regulation provide very specific and detailed rules regarding the utilization of the frequency spectrum and orbit. Outstanding issue arises as to the implementation process of the rules of international character. Domestic implementation of the Radio Regulation, in the way of letter to letter should be discouraged when the competitiveness of domestic industry vis-a-vis foreign competitor is taken into account.

  • PDF

New Circuit Topology of Single-Ended Soft-Switching PWM High Frequency Inverter and Its Performance Evaluations

  • Deguchi Y.;Moisseev S.;Nakaoka M.;Hirota I.;Yamashita H.;Omori H.;Terai H.
    • Proceedings of the KIPE Conference
    • /
    • 2001.10a
    • /
    • pp.247-250
    • /
    • 2001
  • This paper presents a simple and cost effective circuit topology of single-ended type high frequency quasi-resonant PWM inverter using IGBTs, which can operate under wide soft switching operation range based on ZCS for main power switch as compared with a conventional active voltage-clamped ZVS-PWM high frequency quasi-resonant inverter developed previously. In principle, this new circuit topology can efficiently operate under a constant frequency PWM control-based power regulation scheme. In particular, it is noted that the zero current soft switching (ZCS) commutation can achieve for the main active power switch. On the other hand, the zero voltage soft switching (ZVS) commutation can also achieve for the auxiliary active power switch. The operating principle of this high-frequency Inverter treated here and its power regulation characteristics are illustrated on the basis of the simulation and feasible experimental results.

  • PDF

Series Capacitor Compensated Resonant High Frequency Inverter with ZCS-Pulse Density Modulation fey Induction Heating Fixing Roller in Copy Machine

  • Ahmed T.;Shirai H.;Gamage L.;Soshin K.;Nakaoka M.
    • Proceedings of the KIPE Conference
    • /
    • 2003.07b
    • /
    • pp.499-502
    • /
    • 2003
  • This paper presents the voltage source type half bridge lossless auxiliary inductor snubber assisted series capacitor compensated resonant high frequency inverter for induction heated fixing roller in copy machines. This high-frequency inverter treated here can completely achieve zero current soft switching (ZCS) commutation for wide power regulation range under its constant frequency pulse density modulation (PDM) scheme. Its transient and steady-state operating principle is originally presented fur a constant frequency PDM control strategy under a ZCS operation commutation, together with its output effective power regulation characteristics-based on the PDM strategy. The experimental operating performances of this ZCS-PDM high frequency inverter using IGBTs are illustrated as compared with computer simulation ones. Its power losses and actual efficiency are evaluated and discussed on the basis of simulation and experimental results.

  • PDF

The Effects of Father Marital Satisfaction on Young Child Emotion Regulation: Mediating Effects of Father Parenting Participation (아버지의 결혼만족도가 유아의 정서조절능력에 미치는 영향: 아버지의 양육참여도의 매개효과)

  • Yoon, Mi Sun;Kim, Misuk
    • Korean Journal of Child Studies
    • /
    • v.37 no.3
    • /
    • pp.111-122
    • /
    • 2016
  • Objective: The purpose of this study was to investigate the association between father marital satisfaction and parenting participation and young child emotion regulation to determine the mediating effects of father marital satisfaction and parenting participation on young child emotion regulation. Methods: This study was conducted with 249 3-, 4-, and 5-year-olds and their fathers at nurseries in Seoul and Gyeonggi. The collected data were analyzed via frequency, average, standard deviation, Pearson's correlation analysis, Baron and Kenny's hierarchical regression analysis, and the Sobel test. Results: First, father marital satisfaction, parenting participation and young child emotion regulation, including the sub-factors of each variable, were all significantly correlated. Second, father parenting participation was found to have a full-mediating effect emotion regulation of the young child. Meanwhile, father parenting participation was found to have a full mediating effect others-regulation of the young child. In addition, father parenting participation was found to have a partial mediating effect on young child self-regulation. Conclusion: These results suggests the need to provide more practical family programs and realistic governmental support to promote father parenting participation.

Developing a New Risk Assessment Methodology for Distribution System Operators Regulated by Quality Regulation Considering Reclosing Time

  • Saboorideilami, S.;Abdi, Hamdi
    • Journal of Electrical Engineering and Technology
    • /
    • v.9 no.4
    • /
    • pp.1154-1162
    • /
    • 2014
  • In the restructured electricity market, Performance-Based Regulation (PBR) regime has been introduced to the distribution network. To ensure the network stability, this regime is used along with quality regulations. Quality regulation impose new financial risks on distribution system operators (DSOs). The poor quality of the network will result in reduced revenues for DSOs. The mentioned financial risks depend on the quality indices of the system. Based on annual variation of these indices, the cost of quality regulation will also vary. In this paper with regard to reclosing fault in distribution network, we develop a risk-based method to assess the financial risks caused by quality regulation for DSOs. Furthermore, in order to take the stochastic behavior of the distribution network and quality indices variations into account, time-sequential Monte Carlo simulation method is used. Using the proposed risk method, the effect of taking reclosing time into account will be examined on system quality indicators and the cost of quality regulation in Swedish rural reliability test system (SRRTS). The results show that taking reclosing fault into consideration, affects the system quality indicators, particularly annual average interruption frequency index of the system (SAIFI). Moreover taking reclosing fault into consideration also affects the quality regulations cost. Therefore, considering reclosing time provides a more realistic viewpoint about the financial risks arising from quality regulation for DSOs.

The Relationship Between Young Children's Temperament and Emotional Regulation: The Mediating Role of Parenting Sense of Competence (유아의 기질과 정서조절능력 간의 관계: 어머니 양육효능감의 매개적 역할)

  • Park, Yun jeong;Choi, Mi-kyung
    • Korean Journal of Childcare and Education
    • /
    • v.15 no.5
    • /
    • pp.47-68
    • /
    • 2019
  • Objective: The purpose of this study was to investigate the relationships between young children's temperament, emotional regulation ability and mother's parenting sense of competence. Methods: The participants were comprised of 315 young children who attend a kindergarten or day care center and their mothers from Seoul, Inchon, and Gyeonggi-do Province. They completed questionnaires on temperament, emotion regulation ability, and parenting sense of competence. The data were analyzed by frequency analysis, Cronbach's ${\alpha}$, Pearson's correlation coefficients, and multiple regression analysis. Results: It was observed that young children's regularity/adaptability was positively correlated with sense of competence as a parent and young children's emotional regulation. Young children's regularity/adaptability was negatively correlated with dissatisfaction as a parent and young children's emotional instability/negativity. Sense of competence as a parent was positively correlated with young children's emotional regulation and negatively correlated with young children's emotional instability/negativity. In addition, it was further found that the mother's parenting sense of competence tended to play a perfectly/partially mediating role between young children's temperament and young children's emotional regulation ability respectively. Conclusion/Implications: These results clearly indicated that parenting sense of competence plays a crucial role between young children's temperament and emotional regulation.