Time-Domain Ultra-Wideband Radar, Sensor and Components
Theory, Analysis and Design
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Article
A review of widely used drought indices and the challenges of drought assessment under climate change
Under climate change, drought assessment, which can address nonstationarity in drought indicators and anthropogenic implications, is required to mitigate drought impacts. However, the development of drought in...
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Article
Redirecting dynamic surface restructuring of a layered transition metal oxide catalyst for superior water oxidation
Rationally manipulating the in situ formed catalytically active surface of catalysts remains a tremendous challenge for a highly efficient water electrolysis. Here we present a cationic redox-tuning method to ...
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An Algorithm of Spatial Composition of Hourly Rainfall Fields for Improved High Rainfall Value Estimation
This study proposes two variants of the traditional conditional merging (CM) method that merges the next-generation radar (NEXRAD) ground gauge precipitation data. The first method, named CM considering simple...
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Article
Open AccessNanoscale light element identification using machine learning aided STEM-EDS
Light element identification is necessary in materials research to obtain detailed insight into various material properties. However, reported techniques, such as scanning transmission electron microscopy (STE...
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Article
Open AccessWell-to-wake analysis of ethanol-to-jet and sugar-to-jet pathways
To reduce the environmental impacts of the aviation sector as air traffic grows steadily, the aviation industry has paid increasing attention to bio-based alternative jet fuels (AJFs), which may provide lower ...
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Chapter
Biofuel Life-Cycle Analysis
Life-cycle analysis (LCA) is an important tool used to assess the energy and environmental impacts of biofuels. Here, we review biofuel LCA methodology and its application in transportation fuel regulations in...
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Open AccessPolicy Implications of Allocation Methods in the Life Cycle Analysis of Integrated Corn and Corn Stover Ethanol Production
A biorefinery may produce multiple fuels from more than one feedstock. The ability of these fuels to qualify as one of the four types of biofuels under the US Renewable Fuel Standard and to achieve a low carbo...
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Open AccessAnisotropic Terahertz Emission from Bi2Se3 Thin Films with Inclined Crystal Planes
We investigate the surface states of topological insulator (TI) Bi2Se3 thin films grown on Si nanocrystals and Al2O3 substrates by using terahertz (THz) emission spectroscopy. Compared to bulk crystalline Bi2Te2S...
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Open AccessInfluence of corn oil recovery on life-cycle greenhouse gas emissions of corn ethanol and corn oil biodiesel
Corn oil recovery and conversion to biodiesel has been widely adopted at corn ethanol plants recently. The US EPA has projected 2.6 billion liters of biodiesel will be produced from corn oil in 2022. Corn oil ...
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Biomass Storage Options Influence Net Energy and Emissions of Cellulosic Ethanol
Incremental biomass losses during the harvest and storage of energy crops decrease the effective crop yield at the biorefinery gate. These losses can affect the environmental performance of biofuels from cellu...
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Book
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Chapter
Summary and Conclusion
In the last six chapters, this book has covered the theory, analysis, and design of UWB systems. Specifically, the book addresses the analysis, design, integration, and test of a UWB system capable of operatio...
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Chapter
Introduction
This book presents the theory, analysis and design of UWB radar and sensor systems and their components. It addresses five main topics of UWB systems: system analysis, transmitter design, receiver design, ante...
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Chapter
System Analysis
This chapter covers the theory and analysis of UWB systems, particularly the system operating principle, power budget and range resolution. Various UWB pulse signals commonly used for UWB systems, including Ga...
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UWB Receiver Design
In this chapter, we present the design of an UWB receiver based on synchronous sampling that consists of a sampling mixer integrated with a local strobe-pulse generator and a baseband filter and amplifier.It i...
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UWB System Integration and Test
In this chapter, we present the integration and test of a UWB system, which consists of the UWB transmitter, receiver, and antennas described in Chaps. 3 to 5, and demonstrate its use as a UWB system for subsu...
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Chapter
UWB Transmitter Design
In this chapter, we present the design of a sub-nanosecond tunable monocycle pulse transmitter for low-power short-range UWB applications. The transmitter is made up of a clock driving circuit, a SRD coupling ...
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UWB Antenna Design
In this chapter, we present the design of two UWB antennas including the design approach, fabrication and measurement: one is the UWB microstrip quasi-horn antenna and another is the UWB uniplanar antenna. The...
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Article
Open AccessLife-cycle energy use and greenhouse gas emissions of production of bioethanol from sorghum in the United States
The availability of feedstock options is a key to meeting the volumetric requirement of 136.3 billion liters of renewable fuels per year beginning in 2022, as required in the US 2007 Energy Independence and Se...
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Article
Open AccessLife cycle comparison of hydrothermal liquefaction and lipid extraction pathways to renewable diesel from algae
Algae biomass is an attractive biofuel feedstock when grown with high productivity on marginal land. Hydrothermal liquefaction (HTL) produces more oil from algae than lipid extraction (LE) does because protein...
