Engineering Commons^™

Landscape Management For Sustainable Supplies Of Bioenergy Feedstock And Enhanced Soil Quality, Douglas L. Karlen, David J. Muth Jr.

Douglas L Karlen

Agriculture can simultaneously address global food, feed, fi ber, and energy challenges provided our soil, water, and air resources are not compromised in doing so. As we embark on the 19th Triennial Conference of the International Soil and Tillage Research Organization (ISTRO), I am pleased to proclaim that our members are well poised to lead these endeavors because of our comprehensive understanding of soil, water, agricultural and bio-systems engineering processes. The concept of landscape management, as an approach for integrating multiple bioenergy feedstock sources, including biomass residuals, into current crop production systems, is used as the focal point to show …

Reconfiguration Of The Receiver System For Sodium Doppler Wind/Temperature Lidar, Vardan Semerjyan, Tao Yuan

Vardan Semerjyan

Sodium (Na) Faraday filters based spectrometer is a relatively new instrument to study sodium nightglow [Harrell et al., 2010] as well as atmospheric chemistry in the mesopause region. Successful spectrometer measurement demands highly accurate control of filter temperature. The ideal operation site for this Na spectrometer would be an isolated location with minimum nocturnal sky background. Thus, the remote and automatic control of the filter temperature is a requirement for such operation, whereas current temperature controllers can only be adjusted manually by the operator. The proposed approach is aimed not only to enhance the accuracy of the temperature control but …

Angular-Dependences Of Giant In-Plane And Interlayer Magnetoresistances In Bi2te3 Bulk Single Crystals, Zengji Yue

Zengji Yue

Angular-dependences of in-plane and interlayer magnetotransport properties in n-type Bi2Te3 bulk single crystals have been investigated over a broad range of temperatures and magnetic fields. Giant in-plane magnetoresistances (MR) of up to 500% and interlayer MR of up to 200% were observed, respectively. The observed MR exhibits quadratic field dependences in low fields and linear field dependences in high fields. The angular dependences of the MR represent strong anisotropy and twofold oscillations. The observed angle-dependent, giant MR might result from the strong coulomb scattering of electrons as well as impurity scattering in the bulk conduction bands of n-type Bi2Te3. The …

Cars And Carbon - Automobiles And European Climate Policy In A Global Context, Theodoros Zachariadis

Theodoros Zachariadis

No abstract provided.

Hydrogen Production From Biogas By Oxy-Reforming: Reaction System Analysis, Aleksandra Terlecka, Wojciech M. Budzianowski

Wojciech Budzianowski

Oxy-reforming is emerging as an interesting alternative to conventional methods of hydrogen generation. The current article characterises this process through analysis of individual reactions: SMR (steam methane reforming), WGS (water gas shift) and CPO (catalytic partial oxidation). Analyses relate to optimisation of thermal conditions thus enabling cost-effectivenes of the process.

Developing The Next Generation Of Women And Minority Scientists For The Nuclear Energy Industry, Darrell Burrell, Andrea Todd, Aikyna Finch, Maurice Dawson

Maurice Dawson

The largest source of carbon dioxide emissions globally is the combustion of fossil fuels (coal, oil and natural gas) in power plants, automobiles, industrial facilities and other sources. Generating electricity is the single largest source of carbon dioxide emissions, representing 41% of all emissions. Since 2007 the United States has been more actively considering nuclear power as an option for developing energy. Three decades after the Three Mile Island accident seemed to doom the nuclear power industry, the idea of a nuclear renaissance has been gaining public acceptance as a way to generate energy without greenhouse gas emissions and meet …

Extractive Metallurgy Of Copper, Fathi Habashi

Fathi Habashi

Ocena Efektów Modernizacji Systemu Oczyszczania I Ewakuacji Spalin Na Wybranych Przykładach, Robert Oleniacz, Marcelina Groborz, Michał Ożóg

Robert Oleniacz

The paper presents an assessment of changes in air emissions and impacts on air quality resulting from the modernization of flue gas cleaning and evacuation in two Polish coal-fired power plants. These modernizations were associated with the construction of flue gas desulphurisation systems and use for discharging desulphurized gases separate stacks with a height of 120 m. On the basis of analyzes and atmospheric dispersion modeling, it was found that the changes in the effective height of emitters (the apparent point of emission), due to additional reducing of flue gas volume in existing chimneys, caused that important ecological effects of …

Fluorescein-Polyethyleneimine Coated Gadolinium Oxide Nanoparticles As T1 Magnetic Resonance Imaging (Mri)–Cell Labeling (Cl) Dual Agents, Wenlong Xu, Ja Young Park, Krishna Kattel, Md Wasi Ahmad, Badrul Alam Bony, Woo Choul Heo, Seonguk Jin, Jang Woo Park, Yongmin Chang, Tae Jeong Kim, Ji Ae Park, Ji Yeon Do, Kwon Seok Chae, Gang Ho Lee

Dr. Mohammad Wasi Ahmad (Md Wasi Ahmad)

We report the synthesis, characterization and application of highly water-soluble fluoresceinpolyethyleneimine (PEI) coated gadolinium oxide (Gd2O3) nanoparticles to magnetic resonance imaging (MRI) and cell labeling (CL). The average particle diameter and average hydrodynamic diameter were estimated to be 3.92 and 7.5 nm, respectively. Fluorescein-PEI was prepared from EDC/NHS coupling method. The surface coating was characterized by the FT-IR absorption spectrum and the surface coating amount was estimated to be 22.42 wt% from a TGA analysis, corresponding to 0.65 nm22 grafting density. The fluorescein-PEI coated gadolinium oxide nanoparticles showed r1 and r2 of 6.76 and 20.27 s21mM21, respectively, and a strong …

An Analytical Model For Complete Solute Trapping During Rapid Solidification Of Binary Alloys, Sergey Sobolev

Sergey Sobolev

An analytical model has been developed to describe solute partitioning during rapid solidification of binary alloys under local nonequilibrium conditions. The model takes into account the deviations from equilibrium both at the solid–liquid interface according to the kinetic approach of Jackson et al. based on Monte Carlo simulations and in the bulk liquid using local nonequilibrium diffusion model (LNDM). The dimensionless growth parameter b found in the Monte Carlo simulations as the important parameter for solute trapping has been modified for the local nonequilibrium diffusion case. An analytical expression has been developed for the velocity-dependent partition coefficient K which predicts …

Enhancement In The Photocatalytic Activity Of Au@Tio2 Nanocomposites By Pretreatment Of Tio2 With Uv Light, Mohammad Mansoob Khan Dr, M. H. Cho Dr

Dr. Mohammad Mansoob Khan

A novel, efficient and controlled protocol for the synthesis and enhanced photocatalytic activity of Au@TiO2 nanocomposite is developed. TiO2 (P25) was pretreated by employing UV light (λ = 254 nm) and the pretreated TiO2 was uniformly decorated by gold nanoparticles (AuNPs) in presence of sodium citrate and UV light. UV pretreatment makes the TiO2 activated, as electrons were accumulated within the TiO2 in the conduction band. These accumulated electrons facilitate the formation of AuNPs which were of very small size (2-5 nm), similar morphology and uniformly deposited at TiO2 surface. It leads to formation of stable and crystalline Au@TiO2 nanocomposites. …