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IDDOI:10.1190/geo2019-0228.1Published Date2020-03-01JournalGEOPHYSICS, 2020-03-01, Volume 85
Fluids in porous media could resonate due to passing seismic waves when meeting certain conditions of excitation frequency and pore geometry. This study of the resonance of fluids can contribute to applications in hydrocarbon microtremor analysis, enhanced oil recovery methods, and environmental remediation of nonaqueous phase liquid contamination. In this study, the analytical expression of the frequency response function and temporal response function is derived to characterize the resonanc…
Publication
IDDOI:10.1115/1.4045599Published Date2020-03-01JournalJournal of Mechanical Design, 2020-03-01, Volume 142
Abstract Product performance varies with respect to time and space in many engineering applications. This paper discusses how to measure and evaluate the robustness of a product or component when its quality characteristics (QCs) are functions of random variables, random fields, temporal variables, and spatial variables. At first, the existing time-dependent robustness metric is extended to the present time- and space-dependent problem. The robustness metric is derived using the extreme value…
Publication
IDDOI:10.1177/1369433219879362Published Date2020-03-01JournalAdvances in Structural Engineering, 2020-03-01, Volume 23
To accurately predict structural performance under impending extreme winds, it is imperative to identify the existing stressing condition in critical structural components before a hazard (intrinsic stress, referred to as “existing stress” hereafter). The identified existing stress should be added onto the stress induced by future extreme winds in order to determine the real structural performance under these conditions. To identify the existing stress, a novel approach is proposed in this st…
Publication
IDIEEE:8907416Published Date2020-03-01JournalIEEE Sensors Journal, 2020-03-01, Volume 20
We propose and experimentally demonstrate multi-parameter sensors based on the antiresonant (AR) reflecting guidance in a single-mode fiber (SMF)-capillary-SMF structure. The sensor is manufactured by simply fusion splicing a certain length of hollow silica capillary between two commercial SMFs. Two prototypes with different lengths of the sandwiched capillary are fabricated and tested. The first sensor works in a reflection mode, based on the combined mechanisms of Fabry-Perot (FP) interfere…
Publication
ID31865073Published Date2020-03-10JournalThe Science of the total environment, 2020-03-10, Volume 707
This field study evaluated the efficacy of a mature hybrid poplar phytoremediation system for the remediation of toluene in a fractured bedrock aquifer site. Phytoextraction activity of the trees and the ecology and biodegradation potential of root-colonizing bacteria that ultimately influence how much toluene is transported from the roots and phytoextracted to the aboveground point of measurement were explored. Peak-season toluene mass removal rates ranging from 313 to 743 μg/day were quanti…
Publication
ID32043751Published Date2020-02-11JournalJournal of biomedical materials research. Part A, 2020-02-11
Our aims were to 1) evaluate the capacity of hollow hydroxyapatite (HA) microspheres (212 to 250 μm) to serve as a delivery system for controlled release of BMP-2 in vitro and 2) examine relaxin as an enhancer of BMP-2 for bone regeneration. Hollow HA microspheres were converted from borate glass microspheres and characterized using X-ray diffraction, Fourier-transform infrared spectroscopy, scanning electron microscopy, and the Brunauer-Emmett-Teller method. The microspheres loaded with BMP-…
Publication
ID32029624Published Date2020-02-07JournalScience (New York, N.Y.), 2020-02-07, Volume 367
Robust, gas-impeding water-conduction nanochannels that can sieve water from small gas molecules such as hydrogen (H), particularly at high temperature and pressure, are desirable for boosting many important reactions severely restricted by water (the major by-product) both thermodynamically and kinetically. Identifying and constructing such nanochannels into large-area separation membranes without introducing extra defects is challenging. We found that sodium ion (Na)-gated water-conduction …
Publication
ID32062221Published Date2020-02-07JournalWater research, 2020-02-07, Volume 173
Recent findings have demonstrated that activated sludge morphology significantly impacts oxygen transfer efficiency (OTE) in the activated sludge process. In this study, we developed a mechanistic understanding of this impact. Mixed liquor samples collected from a domestic wastewater treatment plant (WWTP) were blended with a bulking activated sludge from a bench scale reactor (BSR) cultured on synthetic wastewater to manipulate various morphological parameters such as the settled sludge volu…
Publication
IDDOI:10.1177/0309324719892732Published Date2020-02-07JournalThe Journal of Strain Analysis for Engineering Design, 2020-02-07
The determination of constitutive relation from the miniature tensile test is of high interest in multiple areas. Here, a convenient experimental method is proposed to determine the true stress–strain curve from the miniature tensile test. The instantaneous cross-sectional area is estimated by only one camera in aid of digital image correlation technique. This method was applied on commercial pure titanium and aluminum 6061 alloys, and the results indicate that the extracted true stress–strai…
Publication
ID32045722Published Date2020-02-04JournalAdvances in colloid and interface science, 2020-02-04, Volume 277
Emulsions, including oil-in-water (O/W) and water-in-oil (W/O) emulsions, can play important roles in both controlling reservoir conformance and displacing residual oil for enhanced oil recovery (EOR) projects. However, current methods, like high-shear mixing, high-pressure homogenizing, sonicators and others, often use lots of extra energy to prepare the emulsions with high costs but very low energy efficiency. In recent decades, spontaneous emulsification methods, which allow one to create …
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