Open Access. Powered by Scholars. Published by Universities.®

Engineering Commons

Open Access. Powered by Scholars. Published by Universities.®

135247 Full-Text Articles 147846 Authors 44573586 Downloads 274 Institutions

All Articles in Engineering

Faceted Search

135247 full-text articles. Page 3087 of 3800.

Capturing Ultrasmall Emt Zeolite From Template-Free Systems, Eng-Poh Ng Dr. 2011 Universiti Sains Malaysia, Penang

Capturing Ultrasmall Emt Zeolite From Template-Free Systems, Eng-Poh Ng Dr.

Eng-Poh Ng

No abstract provided.


Betaine Chloride-Betaine Tetrachloridoferrate(Iii)—An Ionic Liquid Related Crystal Structure Governed By The Pearson Concept, Anja V. Mudring, Tobias Backer 2011 Iowa State University

Betaine Chloride-Betaine Tetrachloridoferrate(Iii)—An Ionic Liquid Related Crystal Structure Governed By The Pearson Concept, Anja V. Mudring, Tobias Backer

Anja V. Mudring

The first betaine chloride tetrachloroidoferrate(III) double salt, (Hbet)2Cl[FeCl4] = (Hbet)Cl·(Hbet)[FeCl4], was obtained from a solution of betaine hydrochloride (HbetCl) and FeCl3∙6 H2O in water. The crystal structure (orthorhombic, Pbcm, a = 6.2717(13), b = 12.841(3), c = 25.693(5) Å, Z = 4) is characterized by layers of tetrachloridoferrate(III) anions separated by chloride-bridged, H-bond mediated cationic (Hbet) dimers. The hydrogen bonding network in the crystal structure follows the Pearson HSAB (hard acid-soft base) concept: According to the Pearson concept, the chloride anions show high affinity to the carboxyl group (hard acid and ...


Materials For Diabetes Therapeutics, Kaitlin M. Bratlie, Roger L. York, Michael A. Invernale, Robert Langer, Daniel G. Anderson 2011 Massachusetts Institute of Technology

Materials For Diabetes Therapeutics, Kaitlin M. Bratlie, Roger L. York, Michael A. Invernale, Robert Langer, Daniel G. Anderson

Kaitlin M. Bratlie

This review is focused on the materials and methods used to fabricate closedloop systems for type 1 diabetes therapy. Herein, we give a brief overview of current methods used for patient care and discuss two types of possible treatments and the materials used for these therapies-(i) artificial pancreases, comprised of insulin producing cells embedded in a polymeric biomaterial, and (ii) totally synthetic pancreases formulated by integrating continuous glucose monitors with controlled insulin release through degradable polymers and glucose-responsive polymer systems. Both the artificial and the completely synthetic pancreas have two major design requirements: the device must be both biocompatible ...


Evaluating The Consequences Of An Inland Waterway Port Closure With A Dynamic Multiregional Interdependence Model, Cameron A. MacKenzie, Kash Barker, F. Hank Grant 2011 University of Oklahoma Norman Campus

Evaluating The Consequences Of An Inland Waterway Port Closure With A Dynamic Multiregional Interdependence Model, Cameron A. Mackenzie, Kash Barker, F. Hank Grant

Cameron A. MacKenzie

As intermodal hubs connecting barge, train, and truck transportation modes, inland ports play an important role in U.S. and global commerce. Like coastal ports, inland ports face the risk of malevolent attacks, man-made accidents, and natural disasters. However, most port impact studies focus on the consequences of one of these disruptive events suddenly closing a coastal port. This paper examines the economic impact of suddenly closing an inland port by combining a simulation and a multiregional input-output model. The simulation models how companies may react if an inland waterway port suddenly closes, and the multiregional dynamic inoperability input-output model ...


Assurance Of Quality Improvement For Tool Steel By Cryo-Processing, Ajit Behera 2011 Indian Institute of Technology - Kharagpur

Assurance Of Quality Improvement For Tool Steel By Cryo-Processing, Ajit Behera

Ajit Behera

Cryo-processing, a supplementary process to conventional heat treatment, involves freezing of materials at cryogenic temperatures to enhance the mechanical and physical properties of materials. This paper deals with improvement of properties of the tool steel by cryogenic treatment and its greater life span in an industrial application. After the Second World War cryogenic technology were abandoned until the seventies when aerospace industry took up this technology again and the treatment started to be developed as a new industrial process. Today cryogenic treatment would be regarded as one of the most important processes in the field of industries, and it is ...


Plasma Surface Engineering: Plasma Spray Coatings, Ajit Behera 2011 Indian Institute of Technology - Kharagpur

Plasma Surface Engineering: Plasma Spray Coatings, Ajit Behera

Ajit Behera

No abstract provided.


Real-Time Strategies For Enhancing Aircraft Performance In Wind, Kamran Turkoglu 2011 University of Minnesota - Twin Cities

Real-Time Strategies For Enhancing Aircraft Performance In Wind, Kamran Turkoglu

Kamran Turkoglu

This thesis presents real-time guidance strategies for unmanned aerial vehicles (UAVs) that can be used to enhance their flight endurance by utilizing insitu measurements of wind speeds and wind gradients. In these strategies, periodic adjustments can be made in the airspeed and/or heading angle command for the UAV to minimize a projected power requirement at some future time. In this thesis, UAV flights are described by a three-dimensional dynamic point-mass model. A stochastic wind field model has been developed not only to reflect the mean wind magnitude behaviour in both vertical and horizontal axis, but also has it been ...


The Influence Of Hydrodynamic Forces On The Transport And Retention Of Colloids In Single Saturated Dolomitic Limestone Fractures, Mike Schutten 2011 McMaster University

The Influence Of Hydrodynamic Forces On The Transport And Retention Of Colloids In Single Saturated Dolomitic Limestone Fractures, Mike Schutten

Sarah E Dickson

No abstract provided.


Erau Aviation Wildlife Hazard Newsletter, Paul F. Eschenfelder 2011 Embry Riddle Aeronautical University - Daytona Beach

Erau Aviation Wildlife Hazard Newsletter, Paul F. Eschenfelder

Paul F. Eschenfelder

No abstract provided.


Oxidative Carbonylation Of 2-Propyn-1-Ol And 2-Methyl-3-Butyn-2-Ol In An Oscillatory Mode, Sergey N. Gorodsky 2011 Moscow State Academy of Fine Chemical Thechnology

Oxidative Carbonylation Of 2-Propyn-1-Ol And 2-Methyl-3-Butyn-2-Ol In An Oscillatory Mode, Sergey N. Gorodsky

Sergey N. Gorodsky

No abstract provided.


Vehicle Longitudinal Control And Traffic Stream Modeling (Paper # 12-0156), Daiheng Ni, John D. Leonard, Gabriel Leiner, Chaoqun Jia 2011 University of Massachusetts - Amherst

Vehicle Longitudinal Control And Traffic Stream Modeling (Paper # 12-0156), Daiheng Ni, John D. Leonard, Gabriel Leiner, Chaoqun Jia

Daiheng Ni

A simple yet efficient traffic flow model, in particular one that describes vehicle longitudinal operational control and further characterizes traffic flow fundamental diagram, is always of great interest to many. Though many models have been proposed in the past, each with their own advantages, research in this area is far from conclusive. This paper contributes a new model, i.e., the longitudinal control model (LCM), to the arsenal with a unique set of properties. The model is suited for a variety of transportation applications, among which a concrete example is provided herein.


Operations Team, Doug Edsey, Noah Root, Jame Pawlik, Josh Berk, Jeremy Straub 2011 Selected Works

Operations Team, Doug Edsey, Noah Root, Jame Pawlik, Josh Berk, Jeremy Straub

Jeremy Straub

No abstract provided.


Economics Of Residue Harvest: Regional Partnership Evaluation, David W. Archer, David J. Muth Jr., Jacob J. Jacobson, Douglas L. Karlen 2011 United States Department of Agriculture

Economics Of Residue Harvest: Regional Partnership Evaluation, David W. Archer, David J. Muth Jr., Jacob J. Jacobson, Douglas L. Karlen

David J. Muth

Economic analyses on the viability of corn (Zea mays, L.) stover harvest for bioenergy production have largely been based on simulation modeling. While some studies have utilized field research data, most field-based analyses have included a limited number of sites and a narrow geographic distribution. An Iowa case study is developed illustrating the use of data extracted from a database of geographically distributed field studies for a region-specific economic analysis. The analysis utilizes grain and residue yield and associated management information from two Iowa field research sites that are Sun Grant Regional Partnership locations associated with the Corn Stover Regional ...


Ground Station Software Model, David Apostal, Atif Mohammad, Jeremy Straub, Josh Berk 2011 Selected Works

Ground Station Software Model, David Apostal, Atif Mohammad, Jeremy Straub, Josh Berk

Jeremy Straub

No abstract provided.


Nachhaltiges It-Management Im Konzern - Von Den Unternehmenszielen Zur Leistungserbringung Der It, Michael Nilles, Enrico Senger 2011 Schindler Informatik AG

Nachhaltiges It-Management Im Konzern - Von Den Unternehmenszielen Zur Leistungserbringung Der It, Michael Nilles, Enrico Senger

Enrico Senger

Der Schindler-Konzern ist ein global führender Hersteller von Aufzügen, Fahrtreppen und Fahrsteigen. Der zentrale Wertbeitrag seiner ITOrganisation liegt in der effektiven und effizienten Unterstützung der Unternehmensziele mit Mitteln der Informationstechnologie. Dieser Beitrag illustriert, wie die Schindler Group IT die Instrumente des strategischen Informationsmanagements nutzt, um die Leistungserbringung an den Unternehmenszielen der Gruppe auszurichten.


Analysis Of Martensitic Transformation In Ni-Mn-Sn Fsma, Ajit Behera 2011 Indian Institute of Technology - Kharagpur

Analysis Of Martensitic Transformation In Ni-Mn-Sn Fsma, Ajit Behera

Ajit Behera

Ferromagnetic shape memory alloys (FSMA) are a new class of potential multifunctional materials with advancement over the conventional heat-driven shape memory alloys due to their exceptional properties. FSMAs can be controlled by magnetic field have attracted considerable attention as a type of magnetic actuator materials. Among the Heusler alloys that exhibit magnetic shape memory effect, the most extensively studied are those of the Ni-Mn-Ga system. However, to overcome some of the problems related to practical application, such as the high cost of gallium and the low martensitic transformation temperature that they usually present, the search for Ga-free alloys has been ...


Mercuric Ionic Liquids: [Cnmim][Hgx3], Where N = 3, 4 And X = Cl, Br, Bert Mallick, Andreas Metlen, Mark Nieuwenhuyzen, Robin D. Rogers, Anja V. Mudring 2011 University of Alabama - Tuscaloosa

Mercuric Ionic Liquids: [Cnmim][Hgx3], Where N = 3, 4 And X = Cl, Br, Bert Mallick, Andreas Metlen, Mark Nieuwenhuyzen, Robin D. Rogers, Anja V. Mudring

Anja V. Mudring

A series of mercury(II) ionic liquids, [Cnmim][HgX3], where [Cnmim] = n-alkyl-3-methylimidazolium with n = 3, 4 and X = Cl, Br, have been synthesized following two different synthetic approaches, and structurally characterized by means of single-crystal X-ray structure analysis ([C3mim][HgCl3] (1), Cc (No. 9), Z = 4, a = 16.831(4) Å, b = 10.7496(15) Å, c = 7.4661(14) Å, β = 105.97(2)°, V = 1298.7(4) Å3 at 298 K; [C4mim][HgCl3] (2), Cc (No. 9), Z = 4, a = 17.3178(28) Å, b = 10.7410(15) Å, c = 7.4706(14) Å, β = 105.590(13 ...


Revealing Pyrolysis Chemistry For Biofuels Production: Conversion Of Cellulose To Furans And Small Oxygenates, Paul J. Dauenhauer, M S. Mettler, S. H. Mushrif, A. D. Paulsen, D. G. Vlachos, A. D. Javadekar 2011 University of Massachusetts - Amherst

Revealing Pyrolysis Chemistry For Biofuels Production: Conversion Of Cellulose To Furans And Small Oxygenates, Paul J. Dauenhauer, M S. Mettler, S. H. Mushrif, A. D. Paulsen, D. G. Vlachos, A. D. Javadekar

Paul J. Dauenhauer

Biomass pyrolysis utilizes high temperatures to produce an economically renewable intermediate (pyrolysis oil) that can be integrated with the existing petroleum infrastructure to produce biofuels. The initial chemical reactions in pyrolysis convert solid biopolymers, such as cellulose (up to 60% of biomass), to a short-lived (less than 0.1 s) liquid phase, which subsequently reacts to produce volatile products. In this work, we develop a novel thin-film pyrolysis technique to overcome typical experimental limitations in biopolymer pyrolysis and identify α-cyclodextrin as an appropriate small-molecule surrogate of cellulose. Ab initio molecular dynamics simulations are performed with this surrogate to reveal the ...


Controlling Nanoparticles Formation In Molten Metallic Bilayers By Pulsed-Laser Interference Heating, Mikhail Khenner, Sagar Yadavali, Ramki Kalyanaraman 2011 Western Kentucky University

Controlling Nanoparticles Formation In Molten Metallic Bilayers By Pulsed-Laser Interference Heating, Mikhail Khenner, Sagar Yadavali, Ramki Kalyanaraman

Mikhail Khenner

The impacts of the two-beam interference heating on the number of core-shell and embedded nanoparticles and on nanostructure coarsening are studied numerically based on the non-linear dynamical model for dewetting of the pulsed-laser irradiated, thin (< 20 nm) metallic bilayers. The model incorporates thermocapillary forces and disjoining pressures, and assumes dewetting from the optically transparent substrate atop of the reflective support layer, which results in the complicated dependence of light reflectivity and absorption on the thicknesses of the layers. Stabilizing thermocapillary effect is due to the local thickness-dependent, steady- state temperature profile in the liquid, which is derived based on the mean substrate temperature estimated from the elaborate thermal model of transient heating and melting/freezing. Linear stability analysis of the model equations set for Ag/Co bilayer predicts the dewetting length scales in the qualitative agreement with experiment.


Line Loss Reduction With Distributed Energy Storage Systems, Xiao Zhang 2011 Carnegie Mellon University

Line Loss Reduction With Distributed Energy Storage Systems, Xiao Zhang

Xiao Zhang

No abstract provided.


Digital Commons powered by bepress