High level languages of maximum power

2021 ◽

Author(s):

V.Yu. Filatova ◽

◽

I.N. Komarova

Keyword(s):

Impact Force ◽

Maximum Power ◽

Force Development ◽

Explosive Force ◽

Sports Skills ◽

High Level ◽

Single Knockout

The article presents the results of a study on the development of impact force in kickboxers' training at the stage of improving sports skills. The study showed that the skill of a kickboxer is determined by the ability to realize the existing power potential in battle, and not by the maximum power indicators of his blows. The results obtained make it possible to say that a kickboxer needs a high level of explosive force development to deliver single knockout blows.

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MPPT Circuit Using Time Exponential Rate Perturbation and Observation for Enhanced Tracking Efficiency for a Wide Resistance Range of Thermoelectric Generator

Applied Sciences ◽

10.3390/app11104650 ◽

2021 ◽

Vol 11 (10) ◽

pp. 4650

Author(s):

Jie Miao ◽

Houpeng Chen ◽

Yu Lei ◽

Yi Lv ◽

Weili Liu ◽

...

Keyword(s):

Metal Oxide ◽

Thermoelectric Generator ◽

Complementary Metal Oxide Semiconductor ◽

Metal Oxide Semiconductor ◽

Maximum Power ◽

Oxide Semiconductor ◽

Cmos Process ◽

Exponential Rate ◽

Point Tracking ◽

High Level

The thermoelectric generator (TEG) stands out among many energy harvesters due to its simple structure, small size, rich thermal energy, and the absence of pollution and noise. However, previous studies have rarely probed into the influence of TEG internal resistances on extracting maximum power from TEGs, and the tracking of efficiency is limited. By analyzing the relationship between the tracking efficiency and the TEG internal resistances, a time exponential rate perturbation and observation (P&O) technology is proposed to achieve maximum power point tracking (MPPT) for a wide resistance range of the TEG. Using the time exponential rate P&O, the MPPT circuit observed the power change by comparing the positive-channel metal-oxide semiconductor (PMOS) on-time and perturbs the power by adjusting the negative-channel metal-oxide semiconductor (NMOS) on-time exponentially. The MPPT circuit was implemented in a 110 nm complementary metal-oxide semiconductor (CMOS) process. The tracking efficiency maintained a high level from 98.9 to 99.5%. The applicable range of the TEG resistance was from 1 to 12 Ω, which reflects an enhancement of at least 2.2 times.

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The Effects of a Maximal Power Training Cycle on the Strength, Maximum Power, Vertical Jump Height and Acceleration of High-Level 400-Meter Hurdlers

Journal of Human Kinetics ◽

10.2478/hukin-2013-0012 ◽

2013 ◽

Vol 36 (1) ◽

pp. 119-126 ◽

Cited By ~ 8

Author(s):

Carlos Balsalobre-Fernández ◽

Carlos Mª Tejero-González ◽

Juan del Campo-Vecino ◽

Dionisio Alonso-Curiel

Keyword(s):

Training Program ◽

Vertical Jump ◽

Training Session ◽

Maximum Power ◽

Jump Height ◽

Power Training ◽

Vertical Jump Height ◽

Training Cycle ◽

Power Load ◽

High Level

The aim of this study was to determine the effects of a power training cycle on maximum strength, maximum power, vertical jump height and acceleration in seven high-level 400-meter hurdlers subjected to a specific training program twice a week for 10 weeks. Each training session consisted of five sets of eight jump-squats with the load at which each athlete produced his maximum power. The repetition maximum in the half squat position (RM), maximum power in the jump-squat (W), a squat jump (SJ), countermovement jump (CSJ), and a 30-meter sprint from a standing position were measured before and after the training program using an accelerometer, an infra-red platform and photocells. The results indicated the following statistically significant improvements: a 7.9% increase in RM (Z=-2.03, p=0.021, δc=0.39), a 2.3% improvement in SJ (Z=-1.69, p=0.045, δc=0.29), a 1.43% decrease in the 30-meter sprint (Z=-1.70, p=0.044, δc=0.12), and, where maximum power was produced, a change in the RM percentage from 56 to 62% (Z=-1.75, p=0.039, δc=0.54). As such, it can be concluded that strength training with a maximum power load is an effective means of increasing strength and acceleration in high-level hurdlers.

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Desain Simulasi Maksimum Power Point Tracking Metode P&O Pada Panel Surya Di Azzahra Hidroponik Juata Tarakan

Elektrika Borneo ◽

10.35334/jeb.v7i1.2107 ◽

2021 ◽

Vol 7 (1) ◽

pp. 5-10

Author(s):

Abil Huda ◽

Wahyudi Siraju

Keyword(s):

Maximum Power ◽

Solar Panels ◽

Simulation Design ◽

Point Tracking ◽

Power Point Tracking ◽

Non Linear ◽

S 100 ◽

Power Point ◽

Time Required ◽

High Level

Solar panels are electricity generators that utilize solar energy. One of them is the Azzahra Hydroponic solar panel with a capacity of 200 Wp which has a non-linear output. According to Amri, (2015) this is due to the changing conditions of the sun. To solve the non-linear problem of solar panels, there are 2 types of controllers, namely PWM and MPPT. This study uses the Perturb Observe (PO) method because this method is simpler, has efficiency and a high level of accuracy compared to other methods (Kesler, 2016). Under conditions of intensity S= 1000 and temperature T = 40°, Pmax is 201.5 W, Po is 201.1 W and the time required for MPPT to track is 0.003 seconds, at S=500 T=25, Pmax= 97 ,7 W and Po = 96.4 W and the time required is 0.006 seconds. And in the condition S = 100 T = 10 obtained Pmax = 9.4 W, Po = 9.3 W and the time required for MPPT to track is 0.04 seconds. Based on the simulation results, it can be concluded that the maximum power point tracking (MPPT) simulation design using the perturb and observe (PO) method was successful and MPPT was able to track the maximum power on Azzahra Hydroponic solar panels under conditions of varying intensity and temperature.

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Transcription factor/DNA interactions visualized by electron spectroscopic imaging

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100122654 ◽

1992 ◽

Vol 50 (1) ◽

pp. 450-451

Author(s):

David P. Bazett-Jones ◽

Mark L. Brown

Keyword(s):

Transcription Factor ◽

Dna Sequences ◽

Transcription Initiation ◽

Molecular Mechanisms ◽

Phosphorus Content ◽

Spectroscopic Imaging ◽

Electron Spectroscopic Imaging ◽

Dna Backbone ◽

Two Parameters ◽

High Level

A multisubunit RNA polymerase enzyme is ultimately responsible for transcription initiation and elongation of RNA, but recognition of the proper start site by the enzyme is regulated by general, temporal and gene-specific trans-factors interacting at promoter and enhancer DNA sequences. To understand the molecular mechanisms which precisely regulate the transcription initiation event, it is crucial to elucidate the structure of the transcription factor/DNA complexes involved. Electron spectroscopic imaging (ESI) provides the opportunity to visualize individual DNA molecules. Enhancement of DNA contrast with ESI is accomplished by imaging with electrons that have interacted with inner shell electrons of phosphorus in the DNA backbone. Phosphorus detection at this intermediately high level of resolution (≈lnm) permits selective imaging of the DNA, to determine whether the protein factors compact, bend or wrap the DNA. Simultaneously, mass analysis and phosphorus content can be measured quantitatively, using adjacent DNA or tobacco mosaic virus (TMV) as mass and phosphorus standards. These two parameters provide stoichiometric information relating the ratios of protein:DNA content.

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Advances in Stem Instrumentation for Biology

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100180562 ◽

1990 ◽

Vol 48 (1) ◽

pp. 362-363

Author(s):

J. S. Wall

Keyword(s):

Scanning Transmission Electron Microscope ◽

Carbon Films ◽

Specimen Preparation ◽

Material Deposition ◽

Active User ◽

Percent Improvement ◽

Scanning Transmission ◽

The Moment ◽

Film Substrate ◽

High Level

The forte of the Scanning transmission Electron Microscope (STEM) is high resolution imaging with high contrast on thin specimens, as demonstrated by visualization of single heavy atoms. of equal importance for biology is the efficient utilization of all available signals, permitting low dose imaging of unstained single molecules such as DNA.Our work at Brookhaven has concentrated on: 1) design and construction of instruments optimized for a narrow range of biological applications and 2) use of such instruments in a very active user/collaborator program. Therefore our program is highly interactive with a strong emphasis on producing results which are interpretable with a high level of confidence.The major challenge we face at the moment is specimen preparation. The resolution of the STEM is better than 2.5 A, but measurements of resolution vs. dose level off at a resolution of 20 A at a dose of 10 el/A2 on a well-behaved biological specimen such as TMV (tobacco mosaic virus). To track down this problem we are examining all aspects of specimen preparation: purification of biological material, deposition on the thin film substrate, washing, fast freezing and freeze drying. As we attempt to improve our equipment/technique, we use image analysis of TMV internal controls included in all STEM samples as a monitor sensitive enough to detect even a few percent improvement. For delicate specimens, carbon films can be very harsh-leading to disruption of the sample. Therefore we are developing conducting polymer films as alternative substrates, as described elsewhere in these Proceedings. For specimen preparation studies, we have identified (from our user/collaborator program ) a variety of “canary” specimens, each uniquely sensitive to one particular aspect of sample preparation, so we can attempt to separate the variables involved.

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A Questionnaire Survey of Current Rehabilitation Practices for Adults With Normal Hearing Sensitivity Who Experience Auditory Difficulties

American Journal of Audiology ◽

10.1044/2020_aja-20-00027 ◽

2020 ◽

Vol 29 (4) ◽

pp. 738-761

Author(s):

Tess K. Koerner ◽

Melissa A. Papesh ◽

Frederick J. Gallun

Keyword(s):

Hearing Aids ◽

Questionnaire Survey ◽

Patient Population ◽

Clinical Care ◽

Normal Hearing ◽

Auditory Training ◽

Training Methods ◽

Hearing Sensitivity ◽

Considerable Benefit ◽

High Level

Purpose A questionnaire survey was conducted to collect information from clinical audiologists about rehabilitation options for adult patients who report significant auditory difficulties despite having normal or near-normal hearing sensitivity. This work aimed to provide more information about what audiologists are currently doing in the clinic to manage auditory difficulties in this patient population and their views on the efficacy of recommended rehabilitation methods. Method A questionnaire survey containing multiple-choice and open-ended questions was developed and disseminated online. Invitations to participate were delivered via e-mail listservs and through business cards provided at annual audiology conferences. All responses were anonymous at the time of data collection. Results Responses were collected from 209 participants. The majority of participants reported seeing at least one normal-hearing patient per month who reported significant communication difficulties. However, few respondents indicated that their location had specific protocols for the treatment of these patients. Counseling was reported as the most frequent rehabilitation method, but results revealed that audiologists across various work settings are also successfully starting to fit patients with mild-gain hearing aids. Responses indicated that patient compliance with computer-based auditory training methods was regarded as low, with patients generally preferring device-based rehabilitation options. Conclusions Results from this questionnaire survey strongly suggest that audiologists frequently see normal-hearing patients who report auditory difficulties, but that few clinicians are equipped with established protocols for diagnosis and management. While many feel that mild-gain hearing aids provide considerable benefit for these patients, very little research has been conducted to date to support the use of hearing aids or other rehabilitation options for this unique patient population. This study reveals the critical need for additional research to establish evidence-based practice guidelines that will empower clinicians to provide a high level of clinical care and effective rehabilitation strategies to these patients.

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