Power Coordination Research Articles

ANALYSIS OF PHYSICAL COMPONENTS IN WRESTLING FREESTYLE

Abstract The purpose of this study was to determine the effect of arm power, agility and eye-hand and foot coordination in performing arm slamming skills in wrestling athletes in West Java Province. The population that was reached in this study were all wrestling athletes in the West Java area, which consisted of 30 freestyle wrestling athletes. Determination of the sample using a saturated sample, meaning that the entire affordable population is used as a research sample. The data analysis technique used is descriptive analysis and path analysis with the help of SPSS version 21 computer program with a significant level of 95% or = 0.05. The results showed that: The direct effect given by the arm power variable (X1) on the eye, hand and foot coordination variable (X3) was -0.414. Then the direct effect given by the agility variable (X2) on the eye, hand and foot coordination variable (X3) is -0.357. Then the direct effect given by the arm power variable (X1) on the arm swing skill variable (Y) is 0.546. Then the direct effect given by the agility variable (X2) on the arm swing skill variable (Y) is 0.638. And lastly, the direct effect given by the eye, hand and foot coordination variable (X3) on the arm slamming skill variable (Y) is 0.351. Sobel test calculations (Sobel Test) obtained that the value of one-tailed probability (One-tailed probability) of 0.029 <0.05. So it can be concluded that the arm power variable (X1) has an indirect effect through eye coordination, hands and feet (X3) against arm slam skills (Y). Then the results of the Sobel test calculation (Sobel Test) obtained that the one-tailed probability value is 0.0730 > 0.05. So it can be concluded that the agility variable (X2) has no indirect effect through eye, hand and foot coordination (X3) on arm slamming skills (Y).
 
 Keywords: Arm Power, Agility, Eye, Hand and Foot Coordination, Arm Kick Skills, Wrestling

Revisiting the Power Co-ordination Challenges of the Original Snowy Mountains Scheme

The Snowy Mountains Scheme (1949–1972) was an Australian hydro-electricity generation triumph. However, the power co-ordination challenges were significant before the invention of fibre optic cable, as this historic paper from June 1964 attests.

Feasibility of an Innovative Rehabilitation Program Adapted for the Post-acute Nursing Home Setting

Live Long Walk Strong is a rehabilitation program that produces large clinically meaningful improvements in mobility when implemented as an outpatient program for older adults. We adapted Live Long Walk Strong for the post-acute nursing home setting within the Veterans Health Administration as a clinical demonstration project. The adapted version includes novel elements and bridges the inpatient stay and three months post-discharge. The inpatient phase focuses on maximizing functional recovery and includes activities focused on timing and coordination of gait, leg strength and power, and trunk muscle endurance. The care transition and virtual (telehealth) post-discharge phase focuses on case management and engagement in physical activity programs. Coaching and behavior change are a consistent focus throughout the program. To date, 13 Veterans (mean age 67.9, SD 11.7 years) have completed the inpatient phase, and of those Veterans, six have completed the entire program, five are still active, one was lost to follow-up, and one was rehospitalized. The program demonstrates feasibility, 91% of all inpatient sessions and 81% of all post-discharge sessions were completed. Regarding preliminary efficacy, 83% of Veterans who completed the program exceeded the minimal detectable change score (4 points) on the Activity Measure for Post-Acute Care (AM-PAC) Mobility scale from program enrollment to completion (mean change 6.5, SD 6.9 points). Based on findings from this clinical demonstration project, the program is feasible. However, future research is needed to further examine the program’s impact on mobility and other outcomes important to older Veterans receiving post-acute nursing home care.

An Active Power Coordination Control Strategy for AC/DC Transmission Systems to Mitigate Subsequent Commutation Failures in HVDC Systems

Subsequent commutation failures (CFs) in HVDC systems will cause large-scale power flow transfer in AC/DC transmission systems and lead to overload risk in HVAC systems. In order to cope with these effects, a power coordination control strategy for the AC/DC transmission system with high-proportion wind power is proposed. Firstly, a model of the AC/DC transmission system considering the large-scale wind farms access is established by analyzing the power transmission characteristics of the AC/DC transmission system with high-proportion wind power, and the power transmission characteristics are analyzed after subsequent CFs. Secondly, the HVDC subsequent CFs can be mitigated by adjusting DC power transmission, while the active power output of the sending-end AC system is reduced by active control of wind turbine generators (WTGs) to reduce the overload risk of the HVAC system. Finally, the proposed power coordination control strategy is simulated and verified based on the established simulation model and actual power grid, and the results show that this strategy can effectively mitigate HVDC’s subsequent CFs and reduce the overload risk in HVAC systems.

Distributed deep reinforcement learning-based coordination performance optimization method for proton exchange membrane fuel cell system

A proton exchange membrane fuel cell (PEMFC) is a multi-input multi-output nonlinear complicated system, the output power and operating efficiency of which are affected by various operating variables. To achieve coordinated control of multiple operating variables and thus improve the stability, performance, and efficiency of the PEMFC power system, a data-driven power coordination management method is proposed. Furthermore, a metaverse-based multiagent double delay deep deterministic policy gradient (MET-MADDPG) algorithm is also presented. The design of this algorithm is structured on the concept of the metaverse in that it employs different metaverses during pre-learning and combines imitation learning and curriculum learning to enable agents in different combinations to be fully trained in different environments to improve coordination strategy robustness. In this algorithm, the hydrogen controller, air controller, water pump controller and radiator controller are regarded as four agents; the objective of the training is to enable agents with their different goals to coordinate. The effectiveness of the proposed algorithm is demonstrated in a series of experiments in which it is compared with existing algorithms.

Supervisory Power Coordination Scheme to Mitigate Power Curtailment in the Application of a Microgrid

There are cases where the output of renewable eappennergy (RE) is curtailed due to an increase in the share of RE. Typically, wind power (WP) is curtailed due to oversupply and low loads at midnight. However, there are cases where the output of WP is limited during the daytime due to the increase in the share of photovoltaics (PV). In the current electricity market, as the share of PV is increased, the curtailments of WP will be increased further, which will add to the difficulties experienced by wind farm operators. This paper proposes a supervisory power coordination scheme. The main purposes are to prevent the penetration of extra power from REs into the grid; thus, the curtailments can be prevented. In order to make it feasible, the proposed scheme is to design a grid-connected microgrid system to be operated only in response to loads and virtual power plant (VPP) requests. The effectiveness of the proposed scheme was verified by simulation studies conducted in the MATLAB/Simulink environment. The verification was conducted based on the voltage criteria, such as the AC voltage regulation between ±6% of the rated AC voltage, the DC voltage regulation between ±10% of the rated DC voltage, the power balance according to variations in the loads, and VPP requests for power. The simulation showed that the proposed scheme is feasible and justifiable, not only to mitigate the power curtailment problem but also to apply different system configurations.

Control as an Enabler for Electrified Mobility

This article outlines the importance of electrified mobility (e-mobility) in modern transport. One key goal of this review is to illustrate the role that control has played, and must continue to play, as e-mobility grows. The coordination of power in multiple modes (mechanical, electrical, and thermal) requires sophisticated controller algorithms. This review advocates for model-based approaches to control since there may not be readily available physical systems from which to gather data and do data-based control. A second goal of the article is to present methods for modeling these powertrain systems that are modular, scalable, flexible, and computationally efficient. A graph-based approach satisfies many of the desired criteria. The third goal is to review control approaches for these classes of systems and detail a hierarchical approach that makes trades across different domains of power. Optimization-based approaches are well suited to achieving the regulation and tracking goals, along with the minimization of costs and the satisfaction of constraints. Multiple examples, within this article and the references therein, support the presentation throughout. This field of e-mobility is rapidly growing, and control engineers are uniquely positioned to have an impact and lead many of the critical developments.

What Is Intensity and How Can It Benefit Exercise Intervention in People With Stroke? A Rapid Review.

Background: Stroke is one of the major causes of chronic physical disability in the United Kingdom, typically characterized by unilateral weakness and a loss of muscle power and movement coordination. When combined with pre-existing comorbidities such as cardiac disease and diabetes, it results in reductions in cardiovascular (CV) fitness, physical activity levels, functional capacity, and levels of independent living. High-intensity training protocols have shown promising improvements in fitness and function for people with stroke (PwS). However, it remains unclear how intensity is defined, measured, and prescribed in this population. Further, we do not know what the optimal outcome measures are to capture the benefits of intensive exercise.Aim: To understand how intensity is defined and calibrated in the stroke exercise literature to date and how the benefits of high-intensity training in PwS are measured.Methods: A rapid review of the literature was undertaken to provide an evidence synthesis that would provide more timely information for decision-making (compared with a standard systematic review). Electronic databases were searched (including Medline, PubMed, CINAHL, and Embase for studies from 2015 to 2020). These were screened by title and abstract for inclusion if they: (a) were specific to adult PwS; and (b) were high-intensity exercise interventions. Eligible studies were critically appraised using the Mixed Method Appraisal Tool (MMAT). The data extraction tool recorded the definition of intensity, methods used to measure and progress intensity within sessions, and the outcomes measure used to capture the effects of the exercise intervention.Results: Seventeen studies were selected for review, 15 primary research studies and two literature reviews. Sixteen of the 17 studies were of high quality. Nine of the primary research studies used bodyweight-supported treadmills to achieve the high-intensity training threshold, four used static exercise bikes, and two used isometric arm strengthening. Five of the primary research studies had the aim of increasing walking speed, five aimed to increase CV fitness, three aimed to improve electroencephalogram (EEG) measured cortical evoked potentials and corticospinal excitability, and two investigated any changes in muscle strength. Although only one study gave a clear definition of intensity, all studies clearly defined the high-intensity protocol used, with most (15 out of 17 studies) clearly describing threshold periods of high-intensity activity, followed by rest or active recovery periods (of varying times). All of the studies reviewed used outcomes specific to body structure and function (International Classification of Functioning, Disability, and Health (ICF) constructs), with fewer including outcomes relating to activity and only three outcomes relating to participation. The reported effect of high-intensity training on PwS was promising, however, the underlying impact on neurological, musculoskeletal, and CV systems was not clearly specified.Conclusions: There is a clear lack of definition and understanding about intensity and how thresholds of intensity in this population are used as an intervention. There is also an inconsistency about the most appropriate methods to assess and provide a training protocol based on that assessment. It remains unclear if high-intensity training impacts the desired body system, given the diverse presentation of PwS, from a neuromuscular, CV, functional, and psychosocial perspective. Future work needs to establish a clearer understanding of intensity and the impact of exercise training on multiple body systems in PwS. Further understanding into the appropriate assessment tools to enable appropriate prescription of intensity in exercise intervention is required. Outcomes need to capture measures specific not only to the body system, but also level of function and desired goals of individuals.

Modeling and Stability Analysis of a Novel Voltage-Oriented Power Coordination Controlled Constant-Frequency AC Microgrid System

The conventional AC microgrid power regulation method is achieved using dual undulations of the grid-side voltage and frequency, whose complex variables and processes make the system less efficient and stable. For this problem, this paper proposes a novel two-hierarchical small signal model stability analysis for islanded AC microgrid systems with a designed power regulation algorithm under the constant frequency, mainly aimed at the continual switching microgrids, and considers the future expansion. MATLAB/Simulink simulations and experiments are conducted to validate the feasibility. It is found that there is a strong consistency between the stability of primary and overall systems, and that two key parameters affect the stability properties. Discussing the mutual influence of various parameters, k1 is positively correlated with control intensity and k2 determines the proportion of reactive power distribution in each power generation. Contrasting with the previous complex processes, the unique points of this method are the simplicity of calculation, parameter induction, response testability, strong operability, and system extensibility. The conclusion is that this constant frequency power control is simple, feasible, and stable under several specified conditions.

Social Innovation Meets Social Media: A Framework Proposal

In this paper, we describe the motivations for the organization of the SISoM-workshop on Social Innovation and Social Media, to be held in the context of the ICWSM 2011. We argue that social innovation and social media, two trends, that have started independently, are bound to increasingly overlap. Social innovators, as well as the growing number of public administrations fostering social innovation, regard social media as a potentially powerful communication and coordination tool. At the same time, it is argued that they will require functionalities and implement practices which differ from those prevalent in the most popular general purpose social media platforms. A theoretical framework and an initial set of research questions are proposed in order to address those matters, which are partially covered by the papers accepted as contributions to the workshop.

ANALISIS POWER OTOT LENGAN, KELENTUKAN DAN KOORDINASI MATA-TANGAN TERHADAP PUKULAN LOB PERMAINAN BULUTANGKIS

This article aims to determine the components of arm muscle power and eye-hand coordination on lob shots in badminton. The method used in analyzing it is in the form of library research. Collecting data on this article through an article indexing engine, namely Google Scholar with the keywords arm muscle power, hand eye coordination, lob strokes in badminton with publication limits from 2016 to 2020. The results obtained from 30 journals reviewed showed that the component of the lob stroke badminton is, speed, accuracy, agility and power. The contribution of each component varies greatly to produce a good technique for a badminton athlete. Conclusions from 30 that have been reviewed show that the needs for the lob component of badminton players are speed, accuracy, agility and maximum power. Each component must function optimally to support an athlete in official and unofficial competitions.

A socio-technical transition path for new energy vehicles in China: A multi-level perspective

The transport sector is a key emitter of greenhouse gasses. We applied socio-technical transition theory and the multi-level perspective (MLP) approach to depict the interplay of three MLP layers (niche, regime, and landscape) and to project future paths for the transition from traditional (fossil fuel) vehicles to new energy vehicles (NEVs) in China. Specifically, the exogenous context nurtures nascent innovations and restrains the development of traditional fuel vehicles; however, the socio-technical system of NEVs is still in the primary stage and cannot meet the needs of consumers. Under double pressures, the socio-technical system of traditional vehicles is generally stable, but there are factors that impinge on this stability. Four phases are identified according to national plans: the initial pre-development phase (2001–2011) protects nascent innovations; core technologies are developed and market share is expanded in the take-off phase (2012–2020); the acceleration phase (2021–2035) strengthens the trend by encouraging key technological breakthroughs, infrastructure construction, and international cooperation; and the last sprint phase (2036–) further develops the low-carbon transition in China's automobile industry. We also illustrate the essential role of government in the Chinese context. Policy implications related to electric power, technological innovation, and industrial coordination are discussed.

Covid-19 Diagnosis, Treatment and Mortality Rate in India: A Review

The SARS-CoV-2 episode began in Wuhan City, China, in December 2019. It is currently a worldwide pandemic, with 7,820,023 affirmed cases, 430,694 deaths, and 3,729,054 recuperations (starting at 14 June 2020). The infection has the potential for fast and broad spread among individuals and nations. There is a great deal of misdirecting data and information holes on the recently risen SARS-CoV-2. Hence, we checked on the most recent updates about various angles including the study of disease transmission, wellspring of contamination, transmission elements, zoonotic potential, infection attributes, and revelation of novel methodologies for ailment control to keep away from overflow of disease later on. Bats assume a significant job in the transmission of the disease to people. Corona viruses are hereditarily assorted and have a high propensity towards visit hereditary changes and quality recombination, which expands the danger of interspecies transmission. Data about the brooding time frame can help in setting up a powerful isolate for asymptomatic bearers, subsequently forestalling the infection spread. From our points of view and dependent on the at present accessible data about the infection and it’s the study of disease transmission, the control of the SARS-CoV-2 requires a powerful and worldwide sickness coordination exertion including multidisciplinary research endeavours (One-Wellbeing approach) through joint effort between governments, disease transmission specialists, virologists, wellbeing specialists, veterinarians, and doctors. At this phase of the ailment flare-up, creating antibodies is vital to constrain the spread of the disease.

A Correlation Between Leg Muscle Explosive Power And Ankles Coordination On The Shooting Accuracy In Soccer Games In Sukasari Village Club

The purpose of this study is to determine the correlation between the explosive power of the leg muscles and the coordination of the ankles on the accuracy of shooting in soccer games in Sukasari Village club. The method used in this research is correlational quantitative method. The population in this study were 20 athletes in Sukasari Village, while the sample in this study were 20 athletes (all). The instruments in this study were the Standing Long Jump test, the Mitcel Soccer test, and the At The Ball shooting test. The data analysis requirements used were the Lillifors normality test and the homogeneity test. The data analysis used was the product moment correlation analysis with a significance level of 5%. Based on the results of the study, it was found that there was a significant relationship between the explosive power of the leg muscles and the coordination of the ankles (X) on the shooting accuracy as indicated by rx1x2y = 0.920 r (0.5) (20) = 0.444.

Primary frequency regulation in power grids with on–off loads: Chattering, limit cycles and convergence to optimality

Load side participation can provide valuable support to the power network in case of urgencies. On many occasions, loads are naturally represented by on and off states. However, the use of on–off loads for frequency control can lead to chattering and undesirable limit cycle behavior, which are issues that need to be resolved for such loads to be used for network support This paper considers the problem of primary frequency regulation with ancillary service from on–off loads in power networks and establishes conditions that lead to convergence guarantees and an appropriate power allocation within the network. In particular, in order to assist existing frequency control mechanisms, we consider loads that switch when prescribed frequency thresholds are exceeded. Such control policies are prone to chattering, which limits their practicality. To resolve this issue, we consider loads that follow a decentralized hysteretic on–off policy, and show that chattering is not observed within such a setting. Hysteretic loads may exhibit, however, limit cycle behavior, which is undesirable. To address this, we propose an adapted hysteretic control scheme for which we provide convergence guarantees. Furthermore, we consider a mixed-integer optimization problem for power allocation and propose a suitable design of the control policy such that the cost incurred at equilibrium is within ϵ from the optimal cost, providing a non conservative value for ϵ. The practicality of our analytic results is demonstrated with numerical simulations on the Northeast Power Coordinating Council (NPCC) 140-bus system.

Coordination of power and natural gas markets via financial instruments

Current electricity and natural gas markets operate with deterministic description of uncertain supply, and in a temporally and sectorally decoupled way. This practice in energy systems is being challenged by the increasing integration of stochastic renewable energy sources. There is a growing need for exchanging operational flexibility among energy sectors, which requires to improve the sectoral coordination between electricity and natural gas markets. In addition, the dispatch of flexible units in both sectors needs to be made in a more uncertainty-aware manner, requiring to strengthen the temporal coordination between day-ahead and real-time energy markets. We explore the use of existing financial instruments in the form of virtual bidding (VB) as a market-based solution to enhance both sectoral and temporal coordination in energy markets. It is established in the literature that VB by purely financial players is able to enhance the temporal coordination between deterministic day-ahead and real-time markets. By developing various stochastic equilibrium and optimization models, we show that VB by physical players, i.e., gas-fired power plants, at the interface of power and natural gas systems is of great potential to improve not only the temporal coordination between deterministic day-ahead and real-time markets, but also the sectoral coordination between deterministic electricity and natural gas markets. We exploit a fully stochastic co-optimization model as an ideal benchmark, and numerically illustrate the benefits of VB for increasing the overall market efficiency in terms of reduced expected operational cost of the entire energy system. We eventually show that flexible resources in both electricity and natural gas markets are dispatched more efficiently in the day-ahead stage when VB exists.

Optimal Voltage–Frequency Regulation in Distributed Sustainable Energy-Based Hybrid Microgrids with Integrated Resource Planning

This work is the earliest attempt to propose an integrated resource planning for distributed hybrid microgrids considering virtual-inertia support (VIS) and demand-response support (DRS) systems. Initially, three-distributed sustainable energy-based unequal hybrid microgrids are envisioned with the availability of solar/wind/bioenergy resources. In order to overcome the effects of intermittency in renewable resources and low inertia, each microgrid is incorporated with DRS and VIS units for demand- and supply-side management, respectively. The proposed system is simulated in MATLAB considering real-time recorded solar/wind data with realistic loading for 12 months. A novel quasi-oppositional chaotic selfish-herd optimization (QCSHO) algorithm is proposed by hybridizing quasi-opposition-based learning and chaotic linear search techniques into the selfish-herd optimization, for optimal regulation of voltage and frequency in microgrids. Then, the system responses are compared with 7 algorithms and 5 error functions to tune PID controllers’ gains, which confirmed the superiority of QCSHO over others. Then, the study proceeds to investigate the voltage, frequency, and tie-line power coordination in 5 extreme scenarios of source and load variations in the proposed system without retuning the controllers. Finally, the system responses are analyzed for 10 different possible allocation of VIS and DRS units in different microgrids to find the most suitable combinations, and the results are recorded.

Networked Microgrids for Reliable Load Sharing in Remote locations of Armed Force

Forward operating bases of the Armed Forces are located in remote areas where grid connection is normally not available and if available are vulnerable to outages due to vagaries of weather or action by adversary. Microgrids are generally more efficient and may provide electric power storage for emergency supply of electricity to mission critical equipment like surveillance systems, sensors, communication, command and control systems of such forward bases. Several small independent microgrids can also be interconnected together to satisfy the energy requirements of the remote military areas. Networking of several self-supervised microgrids is being developed with the aim to enhance efficiency, reliability and resiliency as well as the steadiness of power systems. In this work, an interconnection of microgrids at three remote bases of the armed forces is presented and simulated. The proposed power co-ordination strategy is designed in such a way that during peace time operation it tries to minimize the overall requirement of fossil fuel for generators supplying the critical loads and in case of outages, it can tackle the emergency situation by automatically routing the power to critical loads from other operational bases. The entire system has been simulated and verified using MATLAB 2018.

HUBUNGAN POWER LENGAN DAN KOORDINASI MATA TANGAN TERHADAP AKURASI LEMPARAN BOWLING PADA ATLET CRICKET PUTRI KOTA BEKASI

Cricket is a sport that is played on a grassy field that leads to positive mental development and prioritizes honesty, fairness, honor / respect for others, accepts referee decisions, is polite and self-controlled. The cricket community at 45 Islamic University Bekasi is one of the places for student talent development in cricket, in this cricket sport has basic techniques including punches, catches, and throws. The method used in this research is the correlation research method. The result of this study is that there is a significant relationship between arm power and hand eye coordination on bowling accuracy both partially and simultaneously

Coordinated Control of Independent Microgrid Based on SOC Deviation Rate

System failure due to high failure rate of independent microgrid energy management system (EMS) in high altitude and cold area, considering the difference in charge state (SOC) between multiple energy storage devices in the system, a power coordinated control strategy based on the SOC deviation rate of energy storage devices is proposed, adjust the output power of the energy storage converter according to the difference in SOC of each energy storage device, reduce the difference in SOC of each energy storage device, after the system EMS fails, the operation status of the energy storage equipment is consistent to ensure the normal operation of the system. The RT-LAB simulation platform is used to establish a simulation model and design a digital control system. The control system can quickly carry out power coordination control according to the SOC state of energy storage devices, so it makes the devices output power differently according to the SOC level, reduces the SOC difference of energy storage devices, makes the devices SOC reach the same, and verifies the feasibility and effectiveness of the coordination control strategy.