The Snow Ski as a Dynamic System

1972 ◽  
Vol 94 (2) ◽  
pp. 133-138 ◽  
Author(s):  
R. L. Piziali ◽  
C. D. Mote
Keyword(s):  
Dynamic System ◽  
Laboratory Testing ◽  
Research Laboratory ◽  
Field Measurements ◽  
Static System ◽  
Testing Procedures ◽  
Future Design ◽  
Meaningful Information ◽  
Physical Information ◽  
System Characteristics

Paper reports research on dynamic system characteristics of snow skis. Laboratory and field measurements of frequency response, running surface pressure excitation, and static system characteristics are intended to provide a data base of physical information to guide future design and research. Laboratory testing procedures used give meaningful information for “straight running” but not for “turning.” In general, the turning and straight running maneuvers must be examined independently. This paper summarizes the general research observations with a minimum of detail included.

scholarly journals Re-Opening Exercise Science Laboratories and Testing During the Covid-19 Endemic Phase

2020 ◽  
Author(s):  
Donald R Dengel ◽  
Nicholas G Evanoff
Keyword(s):  
Clinical Research ◽  
Laboratory Testing ◽  
Primary Grade ◽  
Exercise Science ◽  
Laboratory Personnel ◽  
Testing Procedures ◽  
Safe Environment ◽  
The World ◽  
Science Laboratories

AbstractThe coronavirus disease 2019 (COVID-19) pandemic has forced primary/grade schools and university closings as well as forced the suspension of a number of medical and laboratory testing procedures. Exercise science laboratories whether in clinical, research or educational locations were also forced to pause testing procedures. As the COVID-19 pandemic begins to subside in some areas of the world, exercise science laboratories are contemplating how to create a safe environment to resume some laboratory testing activities. In this article, we present suggestions for how exercise science laboratories can open and create a safe environment for subjects, laboratory personnel and equipment upon reopening.

Stability of Cellulose Ester Base Photographic Film: Part I — Laboratory Testing Procedures

SMPTE Journal ◽  
1992 ◽  
Vol 101 (5) ◽  
pp. 336-346 ◽  
Author(s):  
P. Z. Adelstein ◽  
J. M. Reilly ◽  
D. W. Nishimura ◽  
C. J. Erbland
Keyword(s):  
Laboratory Testing ◽  
Photographic Film ◽  
Cellulose Ester ◽  
Testing Procedures ◽  
Ester Base

Apatite Formation on Porous TCP In Vitro: A Comparative Study between Static and Dynamic RSBF Systems

2007 ◽  
Vol 280-283 ◽  
pp. 1581-1584
Author(s):  
Chun Lin Deng ◽  
Ji Yong Chen ◽  
Yang Leng ◽  
Xin Long Wang ◽  
Yao Wu ◽  
...  
Keyword(s):  
Simulated Body Fluid ◽  
Comparative Study ◽  
Dynamic System ◽  
Tricalcium Phosphate ◽  
Body Fluid ◽  
Apatite Formation ◽  
Static System ◽  
Inner Pore

Porous tricalcium phosphate ceramics were immersed in static and dynamic revised simulated body fluid (RSBF) at 37°C. Morphology, composition and phase of precipitates on TCP were identified by SEM, FTIR and TEM methods. FTIR and TEM results indicated the deposits on the inner pore walls of TCP were OCP, and SEM results implied that the deposited way of precipitates in static system was different from that in dynamic system.

New laboratory testing procedures for mix design and classification of bitumen-stabilised materials

2012 ◽  
Vol 13 (4) ◽  
pp. 618-641 ◽  
Author(s):  
K. J. Jenkins ◽  
M. E. Twagira ◽  
R. W. Kelfkens ◽  
W. K. Mulusa
Keyword(s):  
Laboratory Testing ◽  
Mix Design ◽  
Testing Procedures

scholarly journals Development of an Ankle-Foot Prosthesis for Physical Therapy

2019 ◽  
Author(s):  
Eric Nickel ◽  
Gregory Voss ◽  
Andrew Hansen ◽  
Sara Koehler-McNicholas
Keyword(s):  
Physical Therapy ◽  
Range Of Motion ◽  
Laboratory Testing ◽  
Structural Strength ◽  
Load Level ◽  
Strength Testing ◽  
Future Design ◽  
Design Requirements ◽  
Adjustable Range ◽  
Training Protocols

A novel ankle-foot prosthesis with adjustable range-of-motion limits was developed to support implementation of gradual training protocols in the physical therapy of new amputees. Stakeholder interviews drove design requirements that guided the development. Our first prototype did not pass structural strength testing, but with minor revisions to some components, our second prototype was able to pass structural strength testing to the P6 load level (125kg user) of the ISO 10328 standard for prosthetic feet. The system is ready for laboratory testing with prosthesis users and clinicians to generate further insight for future design iterations.

Effects of Turbine Atmospheres on Sulfidation Corrosion

1967 ◽  
Author(s):  
M. J. Donachie ◽  
E. F. Bradley ◽  
R. A. Sprague ◽  
F. P. Talboom
Keyword(s):  
Gas Turbine ◽  
Experimental Evaluation ◽  
Laboratory Testing ◽  
Turbine Engines ◽  
Gas Turbine Engines ◽  
Considerable Effort ◽  
Testing Procedures ◽  
Sulfur Containing

Special problems are encountered in the use of gas turbine engines in salt atmospheres. Ingestion of salt in the presence of sulfur-containing fuels can cause sulfidation corrosion, and considerable effort has been devoted to the theoretical and experimental evaluation of this process. The authors’ company pioneered the development of laboratory testing procedures by which it became possible to study the sulfidation behavior of alloys. This paper reviews these studies, describing the apparatus, the tests, and their various effects.

Wind-Tunnel Setup for Investigating the Response Characteristics of Anemometers

2021 ◽  
Author(s):  
Amir A. S. Pirooz ◽  
Richard G.J. Flay ◽  
Richard Turner ◽  
Cesar Azorin-Molina
Keyword(s):  
Boundary Layer ◽  
Wind Speed ◽  
Wind Tunnel ◽  
Turbulence Intensity ◽  
Urban Areas ◽  
Field Measurements ◽  
Testing Procedure ◽  
Testing Procedures ◽  
Response Characteristics ◽  
Theoretical Approaches

<p>The study aims to outline the wind-tunnel setup and testing procedure in a currently ongoing project designed to compare the response characteristics of various anemometers widely used across the world during different historic periods. The variations of several parameters, including gust and peak factors, and turbulence intensities measured by the anemometers as a function of the averaging duration (i.e. gust duration), and turbulence intensity and wind speed of the incoming airflow will be investigated.</p><p>The outputs of the study will play an essential role in the understanding of historical wind data, and how to account for the changes in anemometers and gust duration in order to eliminate the breakpoints and shifts in wind speed time series, and to produce homogenised wind records.</p><p>The tests will be carried out in the boundary-layer wind tunnel at the University of Auckland, New Zealand. This boundary-layer wind tunnel is a closed-circuit wind tunnel with two fans, a maximum wind speed of 20 m s‒1, and a large cross-section of 3.6 m × 2.5 m (width × height), which makes the tunnel suitable for the proposed experiment. The calibration of the anemometers will be conducted in the empty wind tunnel, which has a relatively low turbulence intensity of about 1% – 1.5%. The calibration is carried out according to the recommendations of ASTM D5096-02 (2017) and using a 3D Cobra wind sensor as the reference.</p><p>Turbulence-inducing elements, such as grids and blocks, are used in the wind tunnel to replicate the random fluctuations of wind in nature, such that high turbulence intensities broadly replicate turbulence in urban areas, and low turbulence intensities are similar to those of exposed open-country and sea surface terrains.</p><p>Details of the calibration and testing procedures as well as analysing the measured data in the wind tunnel will be presented. In addition, the advantages and limitations of wind-tunnel experiments in studying anemometers compared with theoretical approaches and full-scale field measurements will be discussed. </p>

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