Article
Engineering, Civil
M. P. Crisp, M. B. Jaksa, Y. L. Kuo, G. A. Fenton, D. Griffiths
Summary: This study analyzes the impact of a two layer virtual soil profile on site investigation performance and examines several factors affecting it. Through Monte Carlo analysis, investigation performance is evaluated by total expected project cost, showing that optimal investigation can save significant costs.
CANADIAN JOURNAL OF CIVIL ENGINEERING
(2021)
Article
Radiology, Nuclear Medicine & Medical Imaging
Brendan Whelan, Stefania Trovati, Jinghui Wang, Rebecca Fahrig, Peter G. Maxim, Adi Hanuka, Muhammad Shumail, Sami Tantawi, Julian Merrick, Joseph Perl, Paul Keall, Billy W. Loo
Summary: In radiation therapy, precise modulation of x-ray dose is required for tumor treatment while avoiding damage to surrounding organs. This study introduces an all-electronic x-ray collimation concept called SPHINX, which uses a spatially distributed target and collimator array to generate multiple small x-ray beamlets through magnetic scanning of a high energy electron beam.
Article
Chemistry, Physical
Feng Zhang, Xinhe Wang, Mingying Wu, Xinting Hou, Cheng Han, Zhongbing Liu
Summary: This study demonstrated the deterministic and robust optimization design of photovoltaic cells by considering uncertain factors, reducing the influence of uncertainties, and improving output reliability.
JOURNAL OF POWER SOURCES
(2022)
Article
Chemistry, Physical
Prajay Patel, Robert H. Wells, David M. Kaphan, Massimiliano Delferro, Rex T. Skodje, Cong Liu
Summary: This study investigates the impact of surface heterogeneity on catalytic activity of supported organovanadium(III) catalysts, utilizing density functional theory (DFT) and kinetic Monte Carlo (kMC) simulations to model potential active sites and reveal reaction pathways, highlighting the importance of modeling surface heterogeneity in computational catalysis.
Article
Engineering, Aerospace
Emre Soydemir, Panagiotis Petratos
Summary: This study explores the application of statistical methods in flight, focusing on how mathematics is used to predict outcomes through randomly generated numbers and how the Monte Carlo statistical method can accurately determine solutions.
Article
Green & Sustainable Science & Technology
Shi Chen, Panpan Guo, Jingjing Ma, Xian Li, Hang Lin, Yanlin Zhao, Yixian Wang
Summary: This research examines the impact of soil heterogeneity on the bridge piles beneath a nearby tunnel excavation using Monte-Carlo stochastic analysis. Sensitivity analysis reveals the influence of variation in stratum range, coefficient of variation (COV), and fluctuation distance of the soil Young's modulus on pile deformation and failure probability. The study emphasizes the need to consider variations in geological parameters in the surrounding strata of the tunnel. The findings suggest that horizontal and vertical fluctuation distances of 18 m and 4.5 m, respectively, affect the frequency of low stiffness zones in the soil. Furthermore, an increase in COV leads to higher pile deformation and a rising probability of settlement failure. Monte-Carlo simulation calculations demonstrate the importance of accounting for soil heterogeneity in pile foundation stability during construction disturbance.
Article
Environmental Sciences
Ping Guo, Huimin Li, Guangmin Zhang, Wei Tian
Summary: This study used Monte Carlo simulations to evaluate the impact of pollutants on human health at a contaminated site, finding that the main pollutants are within acceptable levels but arsenic and mercury remain major sources of contamination.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Engineering, Environmental
Aamir Ali, Matee Ullah, Adnan Barkat, Waleed Ahmed Raza, Anwar Qadir, Zia ul Qamar
Summary: The study focuses on MASW data acquisition and processing for accurate estimation of shear wave velocity (Vs) using dispersion analysis and Monte Carlo inversion techniques in Abu Dhabi, UAE. The Monte Carlo approach was found to be more efficient and reliable for Vs profile estimation, confirming cavities within the subsurface and improving confidence levels. The characterization of soil at the sites and its implications are also presented with the aid of NEHRP and IBC codes.
BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
(2021)
Article
Engineering, Civil
Shadi Hanandeh, Husam Ardah, Allam Ardah, Murad Abu-Farsakh
Summary: This study proposes an effective method for evaluating the resilient modulus of stabilized weak subgrade soil. Experimental data and regression analysis show that the developed models can accurately estimate the resilient modulus parameters. Monte Carlo simulation predicts a failure probability of 7.2% using the developed models.
TRANSPORTATION GEOTECHNICS
(2022)
Article
Engineering, Civil
Swagata DebRoy, Rajib Saha
Summary: This study evaluates the seismic reliability of a pile foundation-supported building structure embedded in inhomogeneous clay layer, considering inertial interaction. The study indicates that uncertain parameters have a significant influence on the seismic response of the structure, and the serviceability criterion may be the governing parameter for pile foundation design. Furthermore, the study suggests considering the curvature ductility demand of the pile as another crucial design parameter to assess the reliability of the foundation.
EARTHQUAKE ENGINEERING AND ENGINEERING VIBRATION
(2023)
Article
Engineering, Biomedical
Jinghui Wang, Lei Wang, Peter G. Maxim, Billy W. Loo
Summary: An automated optimization strategy was developed for collimator design in small-field radiotherapy systems. Results showed good agreement with the CyberKnife system when prioritizing minimum penumbra, indicating the potential application of this strategy to more complex collimator designs.
PHYSICS IN MEDICINE AND BIOLOGY
(2021)
Article
Physics, Fluids & Plasmas
Yizhi Shen, Adam P. Willard
Summary: In this paper, a method for generating mean field solutions to classical continuous spins is presented. The method outperforms conventional Monte Carlo sampling in terms of convergence speed and accuracy when applied to systems with nonlocal interactions and nonperiodic boundaries.
Article
Computer Science, Software Engineering
Shaokun Zheng, Fengshi Zheng, Kun Xu, Ling-Qi Yan
Summary: This paper introduces an optimization-based ensemble denoising technique that combines multiple individual MC denoisers to clean up noise in renderings. The method computes optimal weights for combining output images from individual denoisers, and is shown to be effective and robust across various scenes and sample rates, outperforming individual denoisers. Additionally, a comprehensive analysis on selecting denoisers to be combined is provided for practical guidance.
ACM TRANSACTIONS ON GRAPHICS
(2021)
Article
Environmental Sciences
H. Yousefi, M. Jamal Omidi, A. Moridi, A. Sarang
Summary: The paper presents a new method for flexible designing of groundwater monitoring networks based on monitoring well priority, optimizing layer weights and correlating vulnerable points with high EC concentration points. Uncertainty analysis was conducted on the DRASTIC method, calculating 10-year analytical capture zones for wells, and proposing two vulnerability threshold strategies. Monitoring priority was determined by counting vulnerable pixels, providing decision-makers with a list of high priority wells based on allocated budget.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH
(2021)
Article
Green & Sustainable Science & Technology
Xudong Le, Xiuqin Cui, Mengyang Zhang, Zhijun Xu, Lin Dou
Summary: This paper investigates the influence of necking defects on the bearing capacity of pile using transparent soil technology. The study shows that increasing necking diameter and length can result in a decrease in vertical bearing capacity. Necking also contributes significantly to soil displacement, leading to the loss of pile resistance and ultimately reducing the bearing capacity of the piles.
Article
Engineering, Civil
M. P. Crisp, M. B. Jaksa, Y. L. Kuo, G. A. Fenton, D. Griffiths
Summary: This study analyzes the impact of a two layer virtual soil profile on site investigation performance and examines several factors affecting it. Through Monte Carlo analysis, investigation performance is evaluated by total expected project cost, showing that optimal investigation can save significant costs.
CANADIAN JOURNAL OF CIVIL ENGINEERING
(2021)
Article
Engineering, Geological
Hamidreza Khatami, An Deng, Mark Jaksa
Summary: The research found that an 'intermediate zone' is introduced within the granular materials when stable arches are formed, where inter-particle contact forces increase in the early stage of active arching and then decrease as the trapdoor displacement continues. The redistribution of granular particles in reaction to arching led to uneven densities throughout the backfills, as shown in the DEM simulation results.
PROCEEDINGS OF THE INSTITUTION OF CIVIL ENGINEERS-GEOTECHNICAL ENGINEERING
(2021)
Article
Engineering, Geological
J. Zhang, A. Deng, M. Jaksa
Summary: The use of a combination of granulated blast furnace slag, fiber, and polymer additive can improve the performance of micaceous soils, but further optimization is needed. Predictive models developed using response surface method can help optimize additive contents to enhance material strength and ductility.
JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING
(2021)
Article
Engineering, Geological
Yuxiao Li, David Airey, Mark Jaksa
Summary: In this paper, the movement of sand particles during rolling dynamic compaction (RDC) was investigated using a 1:10 scale model in the laboratory. The results show that this technique can significantly increase the density of initially loose soil.
INTERNATIONAL JOURNAL OF PHYSICAL MODELLING IN GEOTECHNICS
(2022)
Article
Engineering, Geological
Yue Chen, Mark B. Jaksa, Yien-Lik Kuo, David W. Airey
Summary: This study investigates the performance of rolling dynamic compaction (RDC) using transparent soil and particle image velocimetry (PIV) technique. The results demonstrate that the heavier module induces greater soil displacements at each operating speed and the optimal operating speed is approximately 299mm/s.
CANADIAN GEOTECHNICAL JOURNAL
(2022)
Article
Computer Science, Interdisciplinary Applications
Yue Chen, Mark B. Jaksa, Yien-Lik Kuo, Brendan T. Scott
Summary: The study validates the numerical scale model against field data and suggests that ground settlement is a better indicator than pressure for assessing the number of RDC passes.
COMPUTERS AND GEOTECHNICS
(2021)
Article
Materials Science, Multidisciplinary
Yue Chen, Mark B. Jaksa, Yien-Lik Kuo, David W. Airey
Summary: Rolling dynamic compaction is an efficient soil compaction technique that can be simulated using a finite element-discrete element model. The numerical results obtained from experimental tests are in good agreement with laboratory test results, demonstrating the ground improvement capabilities of rolling dynamic compaction.
Article
Engineering, Geological
Masoud S. G. Manafi, An Deng, Abbas Taheri, Mark B. Jaksa, H. B. Nagaraj
Summary: Soil plasticity is an important index property in geotechnical engineering, which determines the shear strength, permeability, and compressibility of soils. However, current standard test methods for soil plasticity are operator-dependent and inconsistent. This study introduces a new qualitative and quantitative approach, the Manafi Method and Apparatus, for determining the liquid and plastic limits of soils. The results show that the new technique provides a more precise and reliable means of soil plasticity determination.
GEOTECHNICAL TESTING JOURNAL
(2022)
Article
Engineering, Geological
Masoud S. G. Manafi, An Deng, Abbas Taheri, Mark B. Jaksa, H. B. Nagaraj
Summary: This article concludes the discussion on geotechnical testing in the journal GTJ-2022-0093, with three objectives: clarifying the meaning of consistency and toughness, elaborating the combined qualitative and quantitative approach, and justifying the practicality of the Manafi method for a wide range of fine-grained soils regardless of their soil type.
GEOTECHNICAL TESTING JOURNAL
(2022)
Article
Computer Science, Interdisciplinary Applications
Andrew C. Bradley, Mark B. Jaksa, Yien-Lik Kuo
Summary: Rolling dynamic compaction (RDC) uses a heavy non-circular module, called an impact roller, to dynamically compact soil by falling to the ground as it is towed. This study developed a finite element (FE) model of a specific impact roller and validated it against field trials and literature observations. The FE model accurately predicted the behavior of the impact roller and demonstrated significant soil improvement up to depths of 1.2 m directly below the roller, with residual improvement extending to depths of approximately 2.5 m and laterally to 1.25 m.
COMPUTERS AND GEOTECHNICS
(2023)
Article
Computer Science, Interdisciplinary Applications
Yue Chen, Mark B. Jaksa, Brendan T. Scott, Yien-Lik Kuo
Summary: This paper presents a combined FEM-DEM model to investigate the behavior of a 1:13 scale 3-sided roller. The numerical results are compared with field observations and show good agreement. The study also examines the influence of the twin modules of the roller and suggests avoiding using the total weight of the roller to predict the energy imparted to the ground and the depth of influence.
COMPUTERS AND GEOTECHNICS
(2023)
Article
Engineering, Geological
M. P. Crisp, M. B. Jaksa, Y. L. Kuo
Summary: This study explores the scope of site investigation and optimal sampling locations, showing drilling boreholes near foundation piles maximizes investigation quality and failure costs can vary by up to 8% of construction costs depending on location.
GEORISK-ASSESSMENT AND MANAGEMENT OF RISK FOR ENGINEERED SYSTEMS AND GEOHAZARDS
(2022)
Article
Engineering, Geological
Brendan Scott, Mark Jaksa, Peter Mitchell
Summary: This study investigated the depth of influence of rolling dynamic compaction using a four-sided impact roller in a field trial. The results showed that the largest magnitudes of pressure were confined to the top 2 meters beneath the ground surface. By analyzing field data and testing results, equations were presented to predict the depth of improvement.
PROCEEDINGS OF THE INSTITUTION OF CIVIL ENGINEERS-GROUND IMPROVEMENT
(2021)
Article
Engineering, Geological
M. P. Crisp, M. B. Jaksa, Y. L. Kuo
Summary: This study highlights the importance of proper soil testing for cost savings in construction projects. The optimal investigation methods vary depending on soil conditions such as the number of layers and the presence of lenses.
GEORISK-ASSESSMENT AND MANAGEMENT OF RISK FOR ENGINEERED SYSTEMS AND GEOHAZARDS
(2021)
