Results 211 to 220 of about 81,596 (263)
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On the mechanics of dynamic penetration tests
Geomechanics and Geoengineering, 2007This paper describes a numerical model developed to simulate the wave propagation in an elastic media that is applied to in situ dynamic penetration test devices currently used for site characterization. In the model, dynamic equilibrium equations are solved by finite difference analysis in the time domain to produce the discretization of a penetration
F. Schnaid, E. Odebrecht, M. M. Rocha
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Static and dynamic penetration tests of soil
Journal of Terramechanics, 1966Abstract It has become generally agreed that pressure sinkage tests need to be made with quite large plates if the results are to have any reliance to vehicle sinkage, this normally requires heavy apparatus to provide the necessary force. The paper describes an alternative method whereby plates can be hammered into the soil. It is shown that a normal
R Emori, D Schuring
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The Dynamic Penetration Test: A Standard that is not Standardized
Géotechnique, 1970Synopsis The Paper presents a description and a discussion of the technique of making the so-called standard penetration test as used in North and South America. Dynamic penetration tests such as the SPT are used widely in an effort to get results that can be interpreted by engineers on a universal basis.
H. O. Ireland, O. Moretto, M. Vargas
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Understanding cybercriminals through analysis of penetration testing group dynamics
2021 International Conference on Cyber Situational Awareness, Data Analytics and Assessment (CyberSA), 2021Cyberattacks are a major threat in the modern era, yet there is a lack of information on how cybercrime groups think and operate. This paper aims to better understand cyber adversaries by analyzing penetration testing teams during the 2018 and 2019 National Collegiate Penetration Testing Competition, in which groups of students performed similar ...
Rachel Bleiman +2 more
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Improving penetration testing through static and dynamic analysis
Software Testing, Verification and Reliability, 2011AbstractPenetration testing is widely used to help ensure the security of web applications. Using penetration testing, testers discover vulnerabilities by simulating attacks on a target web application. To do this efficiently, testers rely on automated techniques that gather input vector information about the target web application and analyze the ...
William G. J. Halfond +2 more
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Dynamic penetration testing State-of-the-art report
2021The main obstacle is the fact that the interaction of the sounding cone with the contacting soil has both a local and a long distance influence on the machanical behaviour of the cone. The axisymmetric problem of a cone-pointed rod driven into a continuous body refers both to the penetrometer and the driven pile.
K.-J. Melzer, U. Smoltczyk
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A statistical guide for dynamic-penetration test interpretation
Proceedings of the Institution of Civil Engineers - Geotechnical Engineering, 2008This paper presents a methodology, implemented into a computer code, to support the interpretation of dynamic penetration super-heavy (DPSH) soil tests. The program is based on the analysis of variance (Anova) to evaluate the equality of means of groups of number of blows.
V. Navarro +3 more
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Study on the Nonlinear Dynamic Characteristic of Cone Penetrate Test Curve
2008 The 9th International Conference for Young Computer Scientists, 2008Soil on the surface of the earth is the remnants of weathered rock and strata with layer structure appear a time series feature. Static cone penetrate test (CPT) is an exploration technology which can obtain the physical indices of strata accurately.
Jiangdong Cai +2 more
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Experimental tests of trophic dynamics: towards a more penetrating approach
Oecologia, 1999The complex interactions between primary producers, herbivores, carnivores, and detritivores have resulted in the burgeoning field of trophic dynamics. One important contribution is the Fretwell and Oksanen theory (FO theory). The FO theory proposes that the productivity of the environment determines the length of the trophic chain, which, they suggest,
Lauchlan H, Fraser, J Philip, Grime
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Dynamic Cone for Shallow In-Situ Penetration Testing
1966Field calibration of a portable dynamic cone penetrometer was made to determine a penetration resistance relationship with the standard penetration resistance. The penetrometer has been found useful in the inspection of footing foundations and for light field exploration where the standard penetration range of limits is generally known.
George F. Sowers, Charles S. Hedges
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