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362 full-text articles. Page 1 of 16.

Geological Origin As An Input Variable In Reliability-Based Designs: For An Accurate Exploration In Geotechnical Engineering, Juan Camilo Viviescas, Juan Pablo Osorio 2021 Technological University Dublin

Geological Origin As An Input Variable In Reliability-Based Designs: For An Accurate Exploration In Geotechnical Engineering, Juan Camilo Viviescas, Juan Pablo Osorio

Conference papers

Soil is one of the most difficult materials to characterize realistically, which partly explains the uncertainty between the designs and the geostructures real behavior. Different recommendations have arisen with respect to carrying out field investigations in order to reduce the uncertainties inherent to the soil. However, the field exploration and the implementation of sophisticated geotechnical models have proven to be insufficient to mitigate the geotechnical uncertainty. Therefore, Reliability-Based Designs (RBD) emerge as a decision-making tool through the definition of the probability of failure in conjunction with the typical Factors of Safety. RBD requires a previous understanding of the most appropriate ...


Development Of A New Electro-Osmotic Consolidation Apparatus, Yenni Mariana Ramírez-Mazo, Juan Pablo Osorio, Sergio Agudelo 2021 Universidad de Antioquia

Development Of A New Electro-Osmotic Consolidation Apparatus, Yenni Mariana Ramírez-Mazo, Juan Pablo Osorio, Sergio Agudelo

Conference papers

Electro-osmotic consolidation is a ground improvement technique in which a DC voltage is applied to the soil via electrodes, in order to drain the water contained in the pores increasing the effective stress, and thus improving the geotechnical properties of the soil. The technique increases the shear strength, reduces the compressibility, and changes the chemical composition of the saturated soft clayey and silty soils to which it can be applied. Electro-osmotic consolidation has been successfully applied in different projects worldwide. This paper presents the development of a new electro-osmotic consolidation apparatus built at Universidad de Antioquia. Tests were carried on ...


What Are The Benefits Of Using A Hybrid Simulation In Structural And Seismic Engineering?, Emmanuel Zamora Romero 2021 Syracuse University

What Are The Benefits Of Using A Hybrid Simulation In Structural And Seismic Engineering?, Emmanuel Zamora Romero

English Language Institute

This poster is aimed to contrast the advantages of the hybrid simulation method to simulate structural behavior on structural components to characterized seismic response


Kinematic Demands On Pile-Supported Wharves Due To Liquefaction-Induced Lateral Ground Deformations, Thomas John Torkelson II 2021 Portland State University

Kinematic Demands On Pile-Supported Wharves Due To Liquefaction-Induced Lateral Ground Deformations, Thomas John Torkelson Ii

Dissertations and Theses

Kinematic demands from lateral soil deformations can be a major cause of damage to maritime and highway transportation structures such as wharves, ports, and bridges. Data from five centrifuge tests on pile-supported wharves were used to evaluate the accuracy of Newmark Sliding Block Analysis in estimating the kinematic demands on piles. The piles in the centrifuge tests were subjected to varying degrees of liquefaction-induced lateral ground deformations. Pile-pinning effects were included in the analysis by incorporating the lateral pile resistance in the limit-equilibrium slope stability analysis. The results of the analysis have shown that the median Newmark displacements better estimated ...


Probabilistic Analysis Of The Active Earth Pressure On Earth Retaining Walls For C‑Φ Soils According To The Mazindrani And Ganjali Method, Julian Osorio, Juan Camilo Viviescas, Juan Pablo Osorio 2021 Universidad de Antioquia

Probabilistic Analysis Of The Active Earth Pressure On Earth Retaining Walls For C‑Φ Soils According To The Mazindrani And Ganjali Method, Julian Osorio, Juan Camilo Viviescas, Juan Pablo Osorio

Articles

The determination of the earth pressure coefficients (K) in geotechnical engineering is one of the most critical procedures in designing earth retaining walls. However, most earth pressure theories are made for either clay or sands, where the c-ϕ soils are the least analysed. In this paper, an analysis of the earth pressure for drained mixed soils based in Mazindrani and Ganjali (J Geotech Geoenviron Eng 123:110–112, 1997) theory was carried out. Earth pressure coefficients are generally used in a deterministic way and can represent designs under an inadmissible risk. Therefore, Reliability-based design arises as an essential tool to ...


Efectos De La Minería Sobre La Dinámica Fluvial Del Río Ariari Y Los Elementos Antrópicos En El Tramo Del Puente El Alcaraván Y Puerto Caldas, Granada - Meta, Laura Milena Rubiano Camacho, Luis Manuel López Salinas 2021 Universidad de La Salle, Bogotá

Efectos De La Minería Sobre La Dinámica Fluvial Del Río Ariari Y Los Elementos Antrópicos En El Tramo Del Puente El Alcaraván Y Puerto Caldas, Granada - Meta, Laura Milena Rubiano Camacho, Luis Manuel López Salinas

Ingeniería Ambiental y Sanitaria

El rio Ariari, es un río trenzado que ha sido intervenido por factores antrópicos a lo largo de los años. El objetivo de este estudio fue evaluar los efectos de la minería sobre la dinámica fluvial del Río Ariari y los elementos antrópicos localizados en el sector comprendido entre el puente y El Alcaraván y Puerto Caldas. La metodología se basó en 7 fases comprendidas en el tratamiento de información secundaria; la georreferenciación de imágenes aéreas y satelitales; la delimitación de geoformas; evaluación de la dinámica fluvial; identificación de puntos críticos; los efectos de la socavación en la región; y ...


Remote Sensing-Based Statistical Approach For Defining Drained Lake Basins In A Continuous Permafrost Region, North Slope Of Alaska, Helena Bergstedt, Benjamin M. Jones, Kenneth M Hinkel, Louise Farquharson, Benjamin V. Gaglioti, Andrew D. Parsekian, Mikhail Kanevskiy, Noriaki Ohara, Amy L. Breen, Rodrigo C. Rangel, Guido Grosse, Ingmar Nitze 2021 University of Alaska Fairbanks

Remote Sensing-Based Statistical Approach For Defining Drained Lake Basins In A Continuous Permafrost Region, North Slope Of Alaska, Helena Bergstedt, Benjamin M. Jones, Kenneth M Hinkel, Louise Farquharson, Benjamin V. Gaglioti, Andrew D. Parsekian, Mikhail Kanevskiy, Noriaki Ohara, Amy L. Breen, Rodrigo C. Rangel, Guido Grosse, Ingmar Nitze

Michigan Tech Publications

Lake formation and drainage are pervasive phenomena in permafrost regions. Drained lake basins (DLBs) are often the most common landforms in lowland permafrost regions in the Arctic (50% to 75% of the landscape). However, detailed assessments of DLB distribution and abundance are limited. In this study, we present a novel and scalable remote sensing-based approach to identifying DLBs in lowland permafrost regions, using the North Slope of Alaska as a case study. We validated this first North Slope-wide DLB data product against several previously published sub-regional scale datasets and manually classified points. The study area covered >71,000 km2, including ...


Efectos De La Minería Sobre La Dinámica Fluvial Del Río Ariari Y Los Elementos Antrópicos En El Tramo Del Puente El Alcaraván Y Puerto Caldas, Granada - Meta, Laura Milena Rubiano Camacho, Luis Manuel López Salinas 2021 Universidad de La Salle, Bogotá

Efectos De La Minería Sobre La Dinámica Fluvial Del Río Ariari Y Los Elementos Antrópicos En El Tramo Del Puente El Alcaraván Y Puerto Caldas, Granada - Meta, Laura Milena Rubiano Camacho, Luis Manuel López Salinas

Ingeniería Civil

El rio Ariari, es un río trenzado que ha sido intervenido por factores antrópicos a lo largo de los años. El objetivo de este estudio fue evaluar los efectos de la minería sobre la dinámica fluvial del Río Ariari y los elementos antrópicos localizados en el sector comprendido entre el puente y El Alcaraván y Puerto Caldas. La metodología se basó en 7 fases comprendidas en el tratamiento de información secundaria; la georreferenciación de imágenes aéreas y satelitales; la delimitación de geoformas; evaluación de la dinámica fluvial; identificación de puntos críticos; los efectos de la socavación en la región; y ...


Characterizing Soil Stiffness Using Thermal Remote Sensing And Machine Learning, Jordan Ewing, T. Oommen, Paramsothy Jayakumar, Russell Alger 2021 Michigan Technological University

Characterizing Soil Stiffness Using Thermal Remote Sensing And Machine Learning, Jordan Ewing, T. Oommen, Paramsothy Jayakumar, Russell Alger

Michigan Tech Publications

Soil strength characterization is essential for any problem that deals with geomechanics, including terramechanics/terrain mobility. Presently, the primary method of collecting soil strength parameters through in situ measurements but sending a team of people out to a site to collect data this has significant cost implications and accessing the location with the necessary equipment can be difficult. Remote sensing provides an alternate approach to in situ measurements. In this lab study, we compare the use of Apparent Thermal Inertia (ATI) against a GeoGauge for the direct testing of soil stiffness. ATI correlates with stiffness, so it allows one to ...


Evaluating The Performance Of Extreme Learning Machine Technique For Ore Grade Estimation, Clara Akalanya Abuntori, Sulemana Al-Hassan, Daniel Mireku-Gyimah, Yao Yevenyo Ziggah 2021 University of Mines and Technology

Evaluating The Performance Of Extreme Learning Machine Technique For Ore Grade Estimation, Clara Akalanya Abuntori, Sulemana Al-Hassan, Daniel Mireku-Gyimah, Yao Yevenyo Ziggah

Journal of Sustainable Mining

Due to the complex geology of vein deposits and their erratic grade distributions, there is the tendency of overestimating or underestimating the ore grade. These estimated grade results determine the profitability of mining the ore deposit or otherwise. In this study, five Extreme Learning Machine (ELM) variants based on hard limit, sigmoid, triangular basis, sine and radial basis activation functions were applied to predict ore grade. The motive is that the activation function has been identified to play a key role in achieving optimum ELM performance. Therefore, assessing the extent of influence the activation functions will have on the final ...


Development Of A Marine Biodegradable Target Balloon, Blake Samuel Robinson, Arash Sam Akhavi, David Leonardo Albarran-Martinez 2021 California Polytechnic State University, San Luis Obispo

Development Of A Marine Biodegradable Target Balloon, Blake Samuel Robinson, Arash Sam Akhavi, David Leonardo Albarran-Martinez

Materials Engineering

The US Navy utilizes PVC target balloons, known as Killer Tomatoes, that are inflated onboard a naval vessel then deployed into the ocean to calibrate a variety of weaponry. The Navy has requested the investigation of biodegradable polymers to replace the PVC in attempts to reduce ocean waste that is generated from the leftover PVC material. After communicating with American Pacific Plastic Fabricators (APPF), the current manufacturer of the Killer Tomatoes, we gained an understanding of the manufacturing process and the material requirements that would allow a new material to be integrated into their current process. Two proprietary, trial polymers ...


Potentials Of Airborne Hyperspectral Aviris-Ng Data In The Exploration Of Base Metal Deposit—A Study In The Parts Of Bhilwara, Rajasthan, Arindam Guha, Uday Kumar Ghosh, Joyasree Sinha, Amin Beiranvand Pour, Ratnakar Bhaisal, Snehamoy Chatterjee, Nikhil Kumar Baranval, Nisha Rani, K. Vinod Kumar, Pamaraju V.N. Rao 2021 Indian Space Research Organization

Potentials Of Airborne Hyperspectral Aviris-Ng Data In The Exploration Of Base Metal Deposit—A Study In The Parts Of Bhilwara, Rajasthan, Arindam Guha, Uday Kumar Ghosh, Joyasree Sinha, Amin Beiranvand Pour, Ratnakar Bhaisal, Snehamoy Chatterjee, Nikhil Kumar Baranval, Nisha Rani, K. Vinod Kumar, Pamaraju V.N. Rao

Michigan Tech Publications

In this study, we have processed the spectral bands of airborne hyperspectral data of Advanced Visible Infrared Imaging Spectrometer-Next Generation (AVIRIS-NG) data for delineating the surface signatures associated with the base metal mineralization in the Pur-Banera area in the Bhilwara district, Rajasthan, India.The primaryhost rocks of the Cu, Pb, Zn mineralization in the area are Banded Magnetite Quartzite (BMQ), unclassified calcareous silicates, and quartzite. We used ratio images derived from the scale and root mean squares (RMS) error imagesusing the multi-range spectral feature fitting (MRSFF) methodto delineate host rocks from the AVIRIS-NG image. The False Color Composites (FCCs) of ...


Global Health Effects Of Future Atmospheric Mercury Emissions, Yanxu Zhang, Zhengcheng Song, Shaojian Huang, Peng Zhang, Yiming Peng, Peipei Wu, Jing Gu, Stephanie Dutkiewicz, Huanxin Zhang, Shiliang Wu, Feiyue Wang, Long Chen, Shuxiao Wang, Ping Li 2021 Nanjing University

Global Health Effects Of Future Atmospheric Mercury Emissions, Yanxu Zhang, Zhengcheng Song, Shaojian Huang, Peng Zhang, Yiming Peng, Peipei Wu, Jing Gu, Stephanie Dutkiewicz, Huanxin Zhang, Shiliang Wu, Feiyue Wang, Long Chen, Shuxiao Wang, Ping Li

Michigan Tech Publications

Mercury is a potent neurotoxin that poses health risks to the global population. Anthropogenic mercury emissions to the atmosphere are projected to decrease in the future due to enhanced policy efforts such as the Minamata Convention, a legally-binding international treaty entered into force in 2017. Here, we report the development of a comprehensive climate-atmosphere-land-ocean-ecosystem and exposure-risk model framework for mercury and its application to project the health effects of future atmospheric emissions. Our results show that the accumulated health effects associated with mercury exposure during 2010–2050 are $19 (95% confidence interval: 4.7–54) trillion (2020 USD) realized to ...


Bibliometric Survey On Flood Prediction Using Machine Learning, seema patil Prof., Daksh Khurana Mr., Kartik Rao Mr, Priyanshu Meena Mr, Shivendra Singh Mr 2021 Symbiosis International University

Bibliometric Survey On Flood Prediction Using Machine Learning, Seema Patil Prof., Daksh Khurana Mr., Kartik Rao Mr, Priyanshu Meena Mr, Shivendra Singh Mr

Library Philosophy and Practice (e-journal)

Floods are one of the most devastating natural hazards, and modelling them is extremely difficult. Flood prediction model advancement study led to factors such as loss of human and animal life, property damage, and risk mitigation. The focus of this bibliometric survey is to recognise the few studies which have upheld on the factors affecting the floods. The analysis is done based on 254 documents such as articles, conference papers, article reviews and some reviews and notes. India contributes to the maximum number of documents followed by China and the United States of America. This bibliometric survey is conducted using ...


Characterization Of Landslide Processes From Radar Remote Sensing And Hydromechanical Modeling, Yuankun Xu 2021 Southern Methodist University

Characterization Of Landslide Processes From Radar Remote Sensing And Hydromechanical Modeling, Yuankun Xu

Earth Sciences Theses and Dissertations

Landsides are a natural geomorphic process yet a dangerous hazard which annually causes thousands of casualties and billions of property loss in a global scale. Understanding landslide motion kinematics from early initiation to final deposition is critical for monitoring, assessing, and forecasting landslide movement in order to mitigate their hazards. Landslides occur under diverse environmental settings and appear in variable types; however, all types of landslides can be mechanically attributed to shearing failure at the basal surface due to stress regime shift contributed by internal and/or external forcing. Typical internal factors include soil/rock weathering, whereas typical external triggering ...


When It Rains, It Pours: A Case Study Of Spatio-Temporal Variations In High-Intensity Precipitation Events In Arkansas, Deanna Mantooth-Hendrix 2021 University of Arkansas, Fayetteville

When It Rains, It Pours: A Case Study Of Spatio-Temporal Variations In High-Intensity Precipitation Events In Arkansas, Deanna Mantooth-Hendrix

Graduate Theses and Dissertations

Climate change is having an impact on weather systems and ecosystems worldwide. Glaciers are receding, oceans are acidifying, hurricanes are stronger, and extreme precipitation is increasing in frequency. Even with the wealth of data and knowledge about the threat of climate change, some places are slow to adapt because they think that the impact to their ecosystem will not be severe. The goal of this project was to determine if climate change is having an impact on extreme precipitation in the top urban areas of Arkansas. The major concern with an increase in extreme events in urban areas is flooding ...


Determination Of Structural-Geomorphological And Neotectonic Elements Controlling The Oil And Gas Performance Of The Ferghana Region Using Digital Space Images, S Nesmeyanov, Rakhimjan Umurzakov, Samariddin Rabbimkulov, O Voeykova 2021 Sergeev Institute of Environmental Geoscience RAS (IEG RAS), Moscow, Ulansky lane, house 13, building 2, 101000, Moscow, Russian

Determination Of Structural-Geomorphological And Neotectonic Elements Controlling The Oil And Gas Performance Of The Ferghana Region Using Digital Space Images, S Nesmeyanov, Rakhimjan Umurzakov, Samariddin Rabbimkulov, O Voeykova

Technical science and innovation

The article describes the results of studies carried out with the aim of identifying the main structural-geomorphological and neotectonic elements that control oil and gas content within the Fergana depression using materials from remote sensing of the Earth. Based on a quantitative analysis of the distribution of oil and gas fields, the main structures that control the oil and gas content of the territory have established stepped zones (31% of the total number of fields), monoclines (22%), near-side slopes and fault zones (10-15%). Possibilities of identifying such areas using Landsat 8 satellite images were considered. In addition, various published geological ...


Technologies For Hydrocarbon Stairs To Reduce Environmental Pollution When Operating A Filling Station, Uktam Farmanov, S Khabibullaev PhD, N Mirhodjayeva, Ryuji Kikuchi Dr 2021 Tashkent State Technical University named after Islam Karimov, Tashkent, Uzbekistan

Technologies For Hydrocarbon Stairs To Reduce Environmental Pollution When Operating A Filling Station, Uktam Farmanov, S Khabibullaev Phd, N Mirhodjayeva, Ryuji Kikuchi Dr

Technical science and innovation

The article provides information about the loss of hydrocarbons, as well as economic and environmental problems, and fuel energy is a necessary factor in saving resources. The analysis of losses in the current state of technological processes of transportation and storage of hydrocarbons is presented. Detailed information is provided on the role and functions of collars and gas stations, the type of petroleum products stored in them. The article provides information on the physical and chemical properties of pure petroleum products. It also provides analytical information on the amount of product lost during evaporation of gasoline products. It is shown ...


Utilization Of Household Waste-Based Solid Fuel, Shokhrukh Toshpo'latovich Khojiev, Bakhriddin Tilovkabulovich Berdiyarov PhD, Nodir Abdusamikovich Kadirov PhD, Bobur Mirsaid o'g'li Obido, Mehmet Deniz Turan PhD 2021 Tashkent State Technical University named after Islam Karimov, Tashkent, University St. 2A, 100095, Uzbekistan

Utilization Of Household Waste-Based Solid Fuel, Shokhrukh Toshpo'latovich Khojiev, Bakhriddin Tilovkabulovich Berdiyarov Phd, Nodir Abdusamikovich Kadirov Phd, Bobur Mirsaid O'G'Li Obido, Mehmet Deniz Turan Phd

Technical science and innovation

Waste, garbage is a mixture of substances, objects and their parts that have lost their consumer properties in the process use and intended for disposal. The purpose of the article is note the main current concepts of the distribution and plastic waste disposal problem and propose its promising solutions. In Uzbekistan, the number of solid utilities waste is 63 million tons per year (about 450 kg per person), up to 25 % of them can be plastic. Plastics are organic materials based on synthetic or natural polymers consisting of monomer units, combined into long macromolecules. The most common plastics are polyvinyl ...


Soil Improvement By Electro-Osmotic Consolidation: Laboratory Testing, Yenni Mariana Ramírez-Mazo, Juan Pablo Osorio, Sergio C. Agudelo-Flórez 2021 Universidad de Antioquia

Soil Improvement By Electro-Osmotic Consolidation: Laboratory Testing, Yenni Mariana Ramírez-Mazo, Juan Pablo Osorio, Sergio C. Agudelo-Flórez

Conference papers

Electro-osmotic consolidation is a ground improvement technique that has been successfully implemented on the field and at laboratory scale since the 30s. However, its application has been done primarily through empirical procedures and experience. The determinant variables in the effectiveness and efficiency of the improvement are numerous and require further studies. This paper presents the evaluation of the improvement process of an inorganic low plasticity clay subjected to a 150 V/m voltage during 5780 minutes. The special analysis of the strains showed differential settlements, as well as cracking at the surface and with depth. The consolidations curves obtained follow ...


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