scholarly journals Near Surface Laboratory Testing Protocol Development

2018 ◽  
Author(s):  
Woodman Berry ◽  
Amy Cunningham ◽  
Katherine Winters ◽  
Oliver-Denzil Taylor ◽  
Wesley Rowland ◽  
...  
Keyword(s):  
Laboratory Testing ◽  
Near Surface ◽  
Protocol Development ◽  
Testing Protocol

scholarly journals Baseball studies: Baseball bat testing protocol development

2010 ◽  
Vol 2 (2) ◽  
pp. 2681-2686 ◽  
Author(s):  
Patrick Drane ◽  
James Sherwood
Keyword(s):  
Protocol Development ◽  
Testing Protocol

PROTOCOL DEVELOPMENT FOR SORBENT CONTAINMENT BOOMS

1995 ◽  
Vol 1995 (1) ◽  
pp. 877-877 ◽  
Author(s):  
David Cooper ◽  
Atle Nordvik
Keyword(s):  
United States ◽  
Performance Testing ◽  
The United States ◽  
Coast Guard ◽  
Project Work ◽  
Management Service ◽  
United States Coast Guard ◽  
Loading Rates ◽  
Protocol Development ◽  
Testing Protocol

ABSTRACT The Emergencies Engineering Division (EED) of Environment Canada, the Marine Spill Response Corporation, the Canadian Coast Guard, the United States Coast Guard, and the United States Minerals Management Service funded a project that resulted in the development of a new standard performance testing protocol for oil spill sorbents. As a continuation of this project, work is being performed to develop a protocol for testing sorbent booms in a containment configuration at the EED test tank facility in Ottawa. The protocol includes elements to test the behavior of sorbent booms using various currents, oil loading rates, and oil viscosities. The protocol will be proposed as a Canadian test standard and eventually as an international standard.

THE BIOMECHANICS OF INTRAMEDULLARY NAILING: A PROTOCOL FOR LABORATORY TESTING

2002 ◽  
Vol 02 (01) ◽  
pp. 81-97 ◽  
Author(s):  
MAURIZIO COLOMBO ◽  
MANUELA T. RAIMONDI ◽  
TOMASO VILLA ◽  
VIRGINIO QUAGLINI ◽  
RICCARDO PIETRABISSA
Keyword(s):  
Intramedullary Nail ◽  
Laboratory Testing ◽  
Applied Load ◽  
Muscle Force ◽  
Femoral Shaft ◽  
Fracture Site ◽  
Testing Protocol ◽  
Single Leg Stance ◽  
Set Up ◽  
Intact Femur

In this work, a testing protocol has been set up, in order to quantify the load-sharing imposed near the fracture site by an interlocking-type intramedullary nail. A simulated single-leg stance has been applied to a composite fiberglass femur in three different configurations simulating: an intact femur, a fractured nailed femur and a fully healed nailed femur. The repeatability of the measurements and the influence of ilio-tibial band muscle force have been investigated. The tested nail proved to share with the femoral shaft an amount of the total applied load ranging from 50% immediately after the nailing to 80% at full healing.

scholarly journals The development and testing of a modified natural rubber CR solid ankle–cushion heel prosthetic foot for developing countries

2017 ◽  
Vol 4 ◽  
pp. 205566831771297
Author(s):  
Kazuhiko Sasaki ◽  
Jutamat Pinitlertsakun ◽  
Jutima Rattanakoch ◽  
Sasithon Sukthomya ◽  
Gary Guerra ◽  
...  
Keyword(s):  
Developing Countries ◽  
Natural Rubber ◽  
Clinical Studies ◽  
Laboratory Testing ◽  
Testing Machine ◽  
Practical Application ◽  
Cyclic Testing ◽  
Dynamic Mechanical ◽  
Prosthetic Foot ◽  
Testing Protocol

Background Durable and locally fabricated prosthetic feet are important for developing countries. Modifications to the current CR solid ankle–cushion heel prosthetic foot could enhance current foot characteristics and reduce costs. The goal of this project was to modify the keel and rubber outer foot shell to enhance features and reduce costs of the current CR solid ankle–cushion heel offering. Methods The prosthetic foot was designed, fabricated and then tested mechanically for strain and displacement in a cyclic testing machine according to a component of the ISO-10328 testing protocol. Dynamic cyclic testing of both forefoot and heel portions of the foot was conducted. Findings Dynamic mechanical cyclic testing of the forefoot and heel at 1.28 kN for two million cycles at a rate of 1 Hz was successfully achieved. The final cost of producing the foot was roughly $16 USD. Limitations include the inability to perform the full battery of ISO-10328 foot testing, UV testing and a limitation to laboratory testing. Clinical studies examining practical application of the modified foot should be conducted.

Benthic foraminiferal zonation in deep-water carbonate platform margin environments, northern Little Bahama Bank

1988 ◽  
Vol 62 (01) ◽  
pp. 1-8 ◽  
Author(s):  
Ronald E. Martin
Keyword(s):  
Deep Water ◽  
Benthic Foraminifera ◽  
Carbonate Platform ◽  
Sedimentary Facies ◽  
Depositional Environments ◽  
Near Surface ◽  
Sediment Gravity Flows ◽  
Gravity Flows ◽  
Platform Margin ◽  
Water Carbonate

The utility of benthic foraminifera in bathymetric interpretation of clastic depositional environments is well established. In contrast, bathymetric distribution of benthic foraminifera in deep-water carbonate environments has been largely neglected. Approximately 260 species and morphotypes of benthic foraminifera were identified from 12 piston core tops and grab samples collected along two traverses 25 km apart across the northern windward margin of Little Bahama Bank at depths of 275-1,135 m. Certain species and operational taxonomic groups of benthic foraminifera correspond to major near-surface sedimentary facies of the windward margin of Little Bahama Bank and serve as reliable depth indicators. Globocassidulina subglobosa, Cibicides rugosus, and Cibicides wuellerstorfi are all reliable depth indicators, being most abundant at depths >1,000 m, and are found in lower slope periplatform aprons, which are primarily comprised of sediment gravity flows. Reef-dwelling peneroplids and soritids (suborder Miliolina) and rotaliines (suborder Rotaliina) are most abundant at depths <300 m, reflecting downslope bottom transport in proximity to bank-margin reefs. Small miliolines, rosalinids, and discorbids are abundant in periplatform ooze at depths <300 m and are winnowed from the carbonate platform. Increased variation in assemblage diversity below 900 m reflects mixing of shallow- and deep-water species by sediment gravity flows.

Analysis of 2D and 3D defects associated with precipitation of Cu in silicon

1991 ◽  
Vol 49 ◽  
pp. 870-871
Author(s):  
P.M. Rice ◽  
MJ. Kim ◽  
R.W. Carpenter
Keyword(s):  
Colony Growth ◽  
Dark Field ◽  
Dark Side ◽  
Silicide Phase ◽  
Strain Fields ◽  
Near Surface ◽  
Unknown Composition ◽  
Secondary Precipitates ◽  
20 Nm ◽  
2D And 3D

Extrinsic gettering of Cu on near-surface dislocations in Si has been the topic of recent investigation. It was shown that the Cu precipitated hetergeneously on dislocations as Cu silicide along with voids, and also with a secondary planar precipitate of unknown composition. Here we report the results of investigations of the sense of the strain fields about the large (~100 nm) silicide precipitates, and further analysis of the small (~10-20 nm) planar precipitates.Numerous dark field images were analyzed in accordance with Ashby and Brown's criteria for determining the sense of the strain fields about precipitates. While the situation is complicated by the presence of dislocations and secondary precipitates, micrographs like those shown in Fig. 1(a) and 1(b) tend to show anomalously wide strain fields with the dark side on the side of negative g, indicating the strain fields about the silicide precipitates are vacancy in nature. This is in conflict with information reported on the η'' phase (the Cu silicide phase presumed to precipitate within the bulk) whose interstitial strain field is considered responsible for the interstitial Si atoms which cause the bounding dislocation to expand during star colony growth.

Shock consolidation of Ni-Ti alloy powder

1986 ◽  
Vol 44 ◽  
pp. 430-431
Author(s):  
Naresh N. Thadhani ◽  
Thad Vreeland ◽  
Thomas J. Ahrens
Keyword(s):  
Alloy Powder ◽  
Amorphous Material ◽  
Ti Alloy ◽  
Two Phase ◽  
Near Surface ◽  
Optical Micrograph ◽  
Shock Compaction ◽  
Powder Particles ◽  
Ti Powder ◽  
Rapidly Solidified

A spherically-shaped, microcrystalline Ni-Ti alloy powder having fairly nonhomogeneous particle size distribution and chemical composition was consolidated with shock input energy of 316 kJ/kg. In the process of consolidation, shock energy is preferentially input at particle surfaces, resulting in melting of near-surface material and interparticle welding. The Ni-Ti powder particles were 2-60 μm in diameter (Fig. 1). About 30-40% of the powder particles were Ni-65wt% and balance were Ni-45wt%Ti (estimated by EMPA).Upon shock compaction, the two phase Ni-Ti powder particles were bonded together by the interparticle melt which rapidly solidified, usually to amorphous material. Fig. 2 is an optical micrograph (in plane of shock) of the consolidated Ni-Ti alloy powder, showing the particles with different etching contrast.

Preparation of cross-sectional samples for near-surface TEM studies

1987 ◽  
Vol 45 ◽  
pp. 380-381
Author(s):  
R.C. Dickenson ◽  
K.R. Lawless
Keyword(s):  
Standard Sample ◽  
Surface Region ◽  
Specimen Preparation ◽  
Thick Sheet ◽  
Drill Bit ◽  
Sample Holder ◽  
Metal Interface ◽  
Cross Sectional ◽  
Near Surface ◽  
Cold Worked

In thermal oxidation studies, the structure of the oxide-metal interface and the near-surface region is of great importance. A technique has been developed for constructing cross-sectional samples of oxidized aluminum alloys, which reveal these regions. The specimen preparation procedure is as follows: An ultra-sonic drill is used to cut a 3mm diameter disc from a 1.0mm thick sheet of the material. The disc is mounted on a brass block with low-melting wax, and a 1.0mm hole is drilled in the disc using a #60 drill bit. The drill is positioned so that the edge of the hole is tangent to the center of the disc (Fig. 1) . The disc is removed from the mount and cleaned with acetone to remove any traces of wax. To remove the cold-worked layer from the surface of the hole, the disc is placed in a standard sample holder for a Tenupol electropolisher so that the hole is in the center of the area to be polished.

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