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Articles 31 - 38 of 38
Full-Text Articles in Engineering
Evidence Of Instability In Previously-Mapped Landslides As Measured Using Gps, Optical, And Sar Data Between 2007 And 2017: A Case Study In The Portuguese Bend Landslide Complex, California, El Hachemi Y. Bouali, Thomas Oommen, Rüdiger Escobar-Wolf
Evidence Of Instability In Previously-Mapped Landslides As Measured Using Gps, Optical, And Sar Data Between 2007 And 2017: A Case Study In The Portuguese Bend Landslide Complex, California, El Hachemi Y. Bouali, Thomas Oommen, Rüdiger Escobar-Wolf
Michigan Tech Publications
Velocity dictates the destructive potential of a landslide. A combination of synthetic aperture radar (SAR), optical, and GPS data were used to maximize spatial and temporal coverage to monitor continuously-moving portions of the Portuguese Bend landslide complex on the Palos Verdes Peninsula in Southern California. Forty SAR images from the COSMO-SkyMed satellite, acquired between 19 July 2012 and 27 September 2014, were processed using Persistent Scatterer Interferometry (PSI). Eight optical images from the WorldView-2 satellite, acquired between 20 February 2011 and 16 February 2016, were processed using the Co-registration of Optically Sensed Images and Correlation (COSI-Corr) technique. Displacement measurements were …
Comparative Study Of Ethanol Foamed Asphalt Binders And Mixtures Prepared Via Manual Injection And Laboratory Foaming Device, Mohd Rosli Mohd Hasan, Zhanping You
Comparative Study Of Ethanol Foamed Asphalt Binders And Mixtures Prepared Via Manual Injection And Laboratory Foaming Device, Mohd Rosli Mohd Hasan, Zhanping You
Michigan Tech Publications
The consistency of the ethanol foamed binders and mixtures prepared using asphalt binders foamed by the manual injection technique and laboratory foaming device were evaluated and compared in this study. The asphalt binders foamed using both methods was prepared at 120 °C, 130 °C and 140 °C. The performance of ethanol-foamed binders was evaluated in terms of rotational viscosity, expansion ratio, and low temperature cracking. Meanwhile, the performance of foamed WMA mixtures was tested using semi-circular bending (SCB), disk-shaped compact tension (DCT), and tensile strength ratio (TSR) tests. In order to conduct the TSR test, the samples were conditioned using …
Mechanical Properties Of Michigan Basin's Gypsum Before And After Saturation, Mohammadhossein Sadeghiamirshahidi, Stanley Vitton
Mechanical Properties Of Michigan Basin's Gypsum Before And After Saturation, Mohammadhossein Sadeghiamirshahidi, Stanley Vitton
Michigan Tech Publications
The stability analysis of an abandoned underground gypsum mine requires the determination of the mine pillar's strength. This is especially important for flooded abandoned mines where the gypsum pillars become saturated and are subjected to dissolution after flooding. Further, mine pillars are subjected to blast vibrations that generate some level of macro- and micro-fracturing. Testing samples of gypsum must, therefore, simulate these conditions as close as possible. In this research, the strength of gypsum is investigated in an as-received saturated condition using uniaxial compressive strength (UCS), Brazilian tensile strength (BTS) and point load index (PLI) tests. The scale effect was …
Evaluation Of Waste Express Bag As A Novel Bitumen Modifier, Yuming Lin, Chichun Hu, Sanjeev Adhikari, Chuanhai Wu, Miao Yu
Evaluation Of Waste Express Bag As A Novel Bitumen Modifier, Yuming Lin, Chichun Hu, Sanjeev Adhikari, Chuanhai Wu, Miao Yu
Michigan Tech Publications
With the rapid development of China’s e-commerce and logistics industry, a large number of waste express bags (WEBs) have been produced, which are difficult to recycle. The existing methods of waste express bag disposal often cause severe environmental pollution. It was discovered in this paper that the use of WEBs to modify bitumen could be an environmentally friendly way to recycle WEBs. This study aimed to investigate the feasibility of using WEBs to modify bitumen and promote the performance of WEB-modified bitumen. In order to verify this assumption, a series of basic or rheological experiments were conducted on different dosages …
Impact Of Water Mixing And Ice Formation On The Warming Of Lake Superior: A Model-Guided Mechanism Study, Xinyu Ye, Eric J. Anderson, Philip Y. Chu, Chenfu Huang, Pengfei Xue
Impact Of Water Mixing And Ice Formation On The Warming Of Lake Superior: A Model-Guided Mechanism Study, Xinyu Ye, Eric J. Anderson, Philip Y. Chu, Chenfu Huang, Pengfei Xue
Michigan Tech Publications
The Laurentian Great Lakes are one of the most prominent hotspots for the study of climate change induced lake warming. Warming trends in large, deep lakes, which are often inferred by the observations of lake surface temperature (LST) in most studies, are strongly linked to the total lake heat content. In this study, we use a 3D hydrodynamic model to examine the nonlinear processes of water mixing and ice formation that cause changes in lake heat content and further variation of LST. With a focus on mechanism study, a series of process-oriented experiments is carried out to understand the interactions …
Satellite-Based Assessment Of The August 2018 Flood In Parts Of Kerala, India, C. L. Vishnu, K. S. Sajinkumar, Thomas Oommen, R. A. Coffman, K. P. Thrivikramji, V. R. Rani, S. Keerthy
Satellite-Based Assessment Of The August 2018 Flood In Parts Of Kerala, India, C. L. Vishnu, K. S. Sajinkumar, Thomas Oommen, R. A. Coffman, K. P. Thrivikramji, V. R. Rani, S. Keerthy
Michigan Tech Publications
From 1 June to 29 August 2018, Kerala, a state in southwestern India, recorded 36% excess rainfall than normal levels, leading to widespread floods and landslides events and resulting in 445 deaths. In this study, satellite-based data were used to map the flood inundation in the districts of Thrissur, Ernakulam, Alappuzha, Idukki and Kottayam. Specifically, flood delineation was enabled with Sentinel-1A radar data of 21 August 2018 and was compared with an average pre-flood, water-cover map based on Modified Normalized Difference Water Index (MNDWI) that was developed using a January and February 2018 Sentinel-2A dataset. A 90% increase in water …
Integration Of Pretreatment With Simultaneous Counter-Current Extraction Of Energy Sorghum For High-Titer Mixed Sugar Production, Daniel L. Williams, Rebecca Ong, John E. Mullet, David B. Hodge
Integration Of Pretreatment With Simultaneous Counter-Current Extraction Of Energy Sorghum For High-Titer Mixed Sugar Production, Daniel L. Williams, Rebecca Ong, John E. Mullet, David B. Hodge
Michigan Tech Publications
Sorghum (Sorghum bicolor L. Moench) offers substantial potential as a feedstock for the production of sugar-derived biofuels and biochemical products from cell wall polysaccharides (i. e., cellulose and hemicelluloses) and water-extractable sugars (i.e., glucose, fructose, sucrose, and starch). A number of preprocessing schemes can be envisioned that involve processes such as sugar extraction, pretreatment, and densification that could be employed in decentralized, regional-scale biomass processing depots. In this work, an energy sorghum exhibiting a combination of high biomass productivity and high sugar accumulation was evaluated for its potential for integration into several potential biomass preprocessing schemes. This included counter-current …
Assessment Of Post-Wildfire Debris Flow Occurrence Using Classifier Tree, Priscilla Addison, Thomas Oommen, Qiuying Sha
Assessment Of Post-Wildfire Debris Flow Occurrence Using Classifier Tree, Priscilla Addison, Thomas Oommen, Qiuying Sha
Michigan Tech Publications
Besides the dangers of an actively burning wildfire, a plethora of other hazardous consequences can occur afterwards. Debris flows are among the most hazardous of these, being known to cause fatalities and extensive damage to infrastructure. Although debris flows are not exclusive to fire affected areas, a wildfire can increase a location’s susceptibility by stripping its protective covers like vegetation and introducing destabilizing factors such as ash filling soil pores to increase runoff potential. Due to the associated dangers, researchers are developing statistical models to isolate susceptible locations. Existing models predominantly employ the logistic regression algorithm; however, previous studies have …