Engineer Research and Development Center Broad Agency Announcement (DOD)

2019 ◽  
Vol 43 (6) ◽  
pp. 4-4 ◽  
Keyword(s):  
Research And Development ◽  
Engineer Research ◽  
Development Center

scholarly journals KM Tools : Making Connections

2021 ◽  
Author(s):  
Keyword(s):  
Knowledge Management ◽  
Research And Development ◽  
Knowledge Base ◽  
Development Programs ◽  
Engineer Research ◽  
Management Tools ◽  
Experimental Knowledge ◽  
Development Center ◽  
Knowledge Management Tools ◽  
The U.S

Knowledge management is vital to successfully executing research and development programs within the U.S. Army Engineer Research and Development Center (ERDC). Experimental knowledge management initiatives over the years led to discoveries about the best ways to store and access ERDC’s vast knowledge base. This document highlights several of the effective knowledge management tools that evolved from these discoveries, helping you to find and share knowledge!

Comparative Testing between Electrical Impedance and Hybrid Nuclear Devices for Measuring Moisture and Density in Soils

2017 ◽  
Vol 2657 (1) ◽  
pp. 29-36
Author(s):  
Ernest S. Berney ◽  
Mariely Mejías-Santiago
Keyword(s):  
Moisture Content ◽  
Research And Development ◽  
Electrical Impedance ◽  
Coefficient Of Determination ◽  
Dry Density ◽  
Engineer Research ◽  
Construction Operations ◽  
Scale Test ◽  
Development Center ◽  
Crushed Limestone

The U.S. Army Engineer Research and Development Center validated the effectiveness of the TransTech Combined Asphalt Soil Evaluator (CASE) electrical impedance gauge and the Troxler eGauge hybrid electric-nuclear gauge as suitable replacements for nuclear density gauge (NDG) technology. Comparisons of soil density and moisture content were made between the gauges for six distinct soil types at varying densities and levels of moisture content. The CASE unit was calibrated using the sand cone and hot-plate moisture content prior to its correlation to the NDG; the eGauge was used in its shipped configuration without calibration. Full-scale test sections ranging from crushed limestone to fat clays were constructed for the soil evaluations. Results indicated that wet and dry densities obtained with the eGauge very closely matched those of the NDG, with a coefficient of determination (R2) of approximately 94%, but with an R2 of 85% for the measured moisture contents. The calibrated CASE unit's comparison with the NDG moisture content was excellent, with an R 2 of 98%, but the R 2 values were much lower than those of the eGauge for its dry and wet density, at 83% and 59%, respectively. Further, an average R2 of only 30% was found for the CASE unit's ability to capture changing wet density during construction operations, versus 80% for the eGauge. On the basis of the Engineer Research and Development Center findings, the eGauge is recommended as the better replacement for the NDG for wet or dry density measurements. It also requires little to no calibration and has no transport or licensing restrictions.

scholarly journals 2DV RANS-VOF MODELLING OF DEPTHS AND VELOCITIES OF OVERTOPPING WAVES AT OVERWASHED DIKES

2012 ◽  
Vol 1 (33) ◽  
pp. 62 ◽  
Author(s):  
Andrea Natalia Raosa ◽  
Barbara Zanuttigh ◽  
Javier Lopez Lara ◽  
Steven Hughes
Keyword(s):  
Research And Development ◽  
Wave Energy ◽  
Wave Reflection ◽  
Experimental Tests ◽  
Engineer Research ◽  
Reflected Wave ◽  
The University ◽  
Development Center ◽  
The U.S ◽  
Sea Dikes

The purpose of this contribution is the representation of real wave overtopping over sea dikes with the Rans-Vof code (IH-2VOF) developed by the University of Cantabria. More specific objectives are: to identify the real capacity of the IH-2VOF model in the prediction of overflow and to determinate the accuracy of these predictions in order to provide designers with a generally applicable methodology to use the code. The model is validated against experimental tests conducted by Hughes at the U.S. Army Engineer Research and Development Center (ERDC). This analysis shows that the model tends to overestimate wave reflection and better results are obtained by introducing a porous layer around the structure as artificial way to reduce reflected wave energy.

scholarly journals Publications of the U.S. Army Engineer Research and Development Center; Appendix E: FY20 (October 2019-September 2020)

2020 ◽  
Author(s):  
James Dolan
Keyword(s):  
Research And Development ◽  
Engineer Research ◽  
Technical Program ◽  
Development Center ◽  
The U.S

Publications issued October 2019 through September 2020 by the U.S. Army Engineer Research and Development Center (ERDC) are listed. The publications are grouped according to the technical laboratories or technical program for which they were prepared. Procedures for obtaining ERDC reports are included in the Preface.

Sign in / Sign up

Export Citation Format

Share Document