Results 61 to 70 of about 2,299,508 (182)

Measurements of the Flight Trajectory of a Spinning Soccer Ball and the Magnus Force Acting on It

open access: yesProceedings, 2020
The trajectory of a soccer ball, kicked with a spin to curve it into the goal, is strongly influenced by aerodynamic factors such as the Magnus force. Several studies using a wind-tunnel and high-speed cameras have investigated the Magnus force acting on
Takeshi Asai   +6 more
doaj   +1 more source

Client perceptions of the use of a continuous feedback system in therapy

open access: yesJournal of Social Work Education and Practice, 2023
This paper explores the use of the Outcome Rating Scale (ORS) and the Session Rating Scale (SRS) in clinical practice through the perspective of the client. These assessment tools are designed to provide clinicians with direct feedback from clients about
Glenn Stone   +3 more
doaj   +2 more sources

The effect of ball-handling on lower extremity mechanics in soccer [PDF]

open access: yes, 2016
HRS Honors Research Thesis ScholarshipNearly 240,000 soccer injuries are estimated to have occurred in the United States in 2014 with a high number of them non-contact in nature and involving the lower extremities. These injuries result in time-loss from
Pradarelli, Jared
core  

Modeling of porous concrete elements under load

open access: yesSelected Scientific Papers: Journal of Civil Engineering, 2017
It is known that cell concretes are almost immediately destroyed under load, having reached certain critical stresses. Such kind of destruction is called a “catastrophic failure”. Process of crack formation is one of the main factors, influencing process
Demchyna B.H.   +2 more
doaj   +1 more source

Spin Rate and Deflection Ratio of a Ping Pong Ball [PDF]

open access: yesJournal of Science International School Bangkok, 2013
To investigate the effects of a spherical object’s spin rate on the curvature of its flight, Ping Pong balls, of varying spin rates, were hit horizontally and recorded from above with a high-speed camera.
Byung Joon Ahn
doaj  

The Fiscal Impact of Local Property Tax Abatement in Indiana

open access: yesJournal of Public and Nonprofit Affairs, 2016
Property tax abatement is widely used by local governments in the U.S. with the goal of attracting and retaining businesses. This analysis examines the efficacy of such abatement using data on Indiana counties from 2002 through 2011.
Michael Hicks, Dagney Faulk
doaj   +1 more source

PENDAMPINGAN PEMBUATAN ALAT PERAGA BOLUNDARSI UNTUK MENINGKATKAN PEMAHAMAN MATERI BANGUN RUANG BOLA DI MTSN 4 CIREBON

open access: yesAs-Sidanah
This community service activity aimed to support the improvement of mathematics learning quality at MTsN 4 Cirebon by assisting teachers in developing innovative teaching aids. The urgency of this program lies in the abstract nature of spherical geometry,
Nurma Izzati   +3 more
doaj   +1 more source

Coefficient of Restitution of Wet Tennis Balls [PDF]

open access: yesJournal of Science International School Bangkok, 2014
The coefficient of restitution of a damp tennis ball is of interest to tennis players. Using a spray bottle, water was added to a tennis ball and the mass of water on the wet ball was determined.
Eugene Jang, Tony Kim
doaj  

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