"USE OF NOVA-5000 DIGITAL LABORATORY IN THE SYSTEM OF MEANS OF DEMONSTRATION PHYSICAL EXPERIMENT"

The downstream nappe wind caused by flood discharge has a great influence on the rainfall distribution, the operational safety of dams, and their surrounding ecological environments. A physical experiment was conducted to measure the spatial distribution of the downstream nappe wind and the splash for a continuous bucket (CB) and a tongue-shaped bucket (TB) for five bucket angles (40°, 45°, 50°, 55°, and 60°). The experimental results demonstrate that the trajectory width and height of the nappe increase as the angles increase, but the effect on the length is converse. The wind velocity and splash weight of the two buckets decrease along the flowing direction. In the lateral direction, the wind velocity and splash weight for the CB decrease as y increases, but the wind velocity of the TB trends to humplike; its splash weight decreases near the axis of the bucket, and is stable in the other region. In the vertical direction, the velocity for the CB increases and then decreases as z increases, but that for the TB decreases monotonously. The velocity of the wind and weight of the splash for the CB decreases with the increasing angles, but those of the TB peak at 45°. The findings are useful for the more accurate prediction of rainfall.

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Evaluation of the Wyoming Weather Modification Pilot Project (WWMPP) Using Two Approaches: Traditional Statistics and Ensemble Modeling

Journal of Applied Meteorology and Climatology ◽

10.1175/jamc-d-17-0335.1 ◽

2018 ◽

Vol 57 (11) ◽

pp. 2639-2660 ◽

Cited By ~ 9

Author(s):

Roy M. Rasmussen ◽

Sarah A. Tessendorf ◽

Lulin Xue ◽

Courtney Weeks ◽

Kyoko Ikeda ◽

...

Keyword(s):

Null Hypothesis ◽

Initial Conditions ◽

Pilot Project ◽

Physical Experiment ◽

Annual Precipitation ◽

Ensemble Modeling ◽

Cloud Seeding ◽

Weather Modification ◽

Mountain Ranges ◽

The Impact

AbstractThe Wyoming Weather Modification Pilot Project randomized cloud seeding experiment was a crossover statistical experiment conducted over two mountain ranges in eastern Wyoming and lasted for 6 years (2008–13). The goal of the experiment was to determine if cloud seeding of orographic barriers could increase snowfall and snowpack. The experimental design included triply redundant snow gauges deployed in a target–control configuration, covariate snow gauges to account for precipitation variability, and ground-based seeding with silver iodide (AgI). The outcomes of this experiment are evaluated with the statistical–physical experiment design and with ensemble modeling. The root regression ratio (RRR) applied to 118 experimental units provided insufficient statistical evidence (p value of 0.28) to reject the null hypothesis that there was no effect from ground-based cloud seeding. Ensemble modeling estimates of the impact of ground-based seeding provide an alternate evaluation of the 6-yr experiment. The results of the model ensemble approach with and without seeding estimated a mean enhancement of precipitation of 5%, with an inner-quartile range of 3%–7%. Estimating the impact on annual precipitation over these mountain ranges requires results from another study that indicated that approximately 30% of the annual precipitation results from clouds identified as seedable within the seeding experiment. Thus the seeding impact is on the order of 1.5% of the annual precipitation, compared to 1% for the statistical–physical experiment, which was not sufficient to reject the null hypothesis. These results provide an estimate of the impact of ground-based cloud seeding in the Sierra Madre and Medicine Bow Mountains in Wyoming that accounts for uncertainties in both initial conditions and model physics.

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NO2 Gas Sensing Mechanism of ZnO Thin-Film Transducers: Physical Experiment and Theoretical Correlation Study

ACS Sensors ◽

10.1021/acssensors.6b00051 ◽

2016 ◽

Vol 1 (4) ◽

pp. 406-412 ◽

Cited By ~ 42

Author(s):

Athanasios Tamvakos ◽

Kiprono Korir ◽

Dimitrios Tamvakos ◽

Davide Calestani ◽

Giancarlo Cicero ◽

...

Keyword(s):

Thin Film ◽

Gas Sensing ◽

Correlation Study ◽

Physical Experiment ◽

Zno Thin Film ◽

Sensing Mechanism

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Effect of level difference between left and right vocal folds on phonation: Physical experiment and theoretical study

The Journal of the Acoustical Society of America ◽

10.1121/1.4996105 ◽

2017 ◽

Vol 142 (2) ◽

pp. 482-492 ◽

Cited By ~ 4

Author(s):

Isao T. Tokuda ◽

Ryo Shimamura

Keyword(s):

Theoretical Study ◽

Vocal Folds ◽

Physical Experiment ◽

Level Difference ◽

Left And Right

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USE OF MOBILE DEVICE SENSORS TO CONDUCT THE PHYSICAL EXPERIMENT

OPEN EDUCATIONAL E-ENVIRONMENT OF MODERN UNIVERSITY ◽

10.28925/2414-0325.2019s31 ◽

2019 ◽

pp. 345-354

Author(s):

Sergii Tereschuk ◽

Vira Kolmakova

Keyword(s):

Stem Education ◽

Mobile Device ◽

Mobile Application ◽

Positive Impact ◽

Physical Experiment ◽

Science Journal ◽

Conservation Of Energy ◽

Physical Experiments ◽

Physical Laws ◽

Physical Phenomena

The concept of "sensor" in the system of physical experiment at school is considered in the article. The possibility of using sensors in physics lessons is substantiated: transformation of an input signal into an output is accompanied by transformation of one type of energy into another (according to the law of conservation of energy), and the functioning of the sensors are based on physical phenomena (physical effects or principles), which are described by the relevant physical laws. The article deals with the methodical aspects of using the Google Science Journal mobile application in physics lessons. This application allows you to use the sensors of your mobile device for a physical experiment. As an example we consider the frontal laboratory work "Determination of the period of oscillation of the mathematical pendulum". The method of its carrying out is offered in two approaches: the first one involves the traditional technique of conducting the experiment, and the second approach is using the mobile application Google Science Journal. The article shows that the use of smartphone sensors in physics lessons has perspectives in the context of STEM education. Thus, the use of the considered application is of current importance and requires further scientific and methodological research on its use in the high school physical experimentation system. The Science Journal mobile application can be used to connect external sensors, which will have a positive impact on the introduction of STEM education, and to use Arduino in the demonstration of physical experiments by a physics teacher. Connecting sensors using an Arduino microcontroller is particularly promising in creative lab work on physics.

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