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The Nucleus 2009-2010, Rosalie A. Richards 2010 Georgia College and State University

The Nucleus 2009-2010, Rosalie A. Richards

Science Education Center

No abstract provided.


Constitutive Response And Mechanical Properties Of Pfsa Membranes In Liquid Water, Ahmet Kusoglu, Yaliang Tang, Melissa Lugo, Anette M. Karlsson, Michael H. Santare, Simon Cleghorn, William B. Johnson 2010 University of Delaware

Constitutive Response And Mechanical Properties Of Pfsa Membranes In Liquid Water, Ahmet Kusoglu, Yaliang Tang, Melissa Lugo, Anette M. Karlsson, Michael H. Santare, Simon Cleghorn, William B. Johnson

Mechanical Engineering Faculty Publications

The mechanical properties and swelling behavior of perfluorosulfonic acid (PFSA) membranes in liquid water have been investigated using a custom-built, temperature-controlled water bath. Interestingly, the theoretical models of Mooney-Rivlin and Ogden for rubber elasticity are shown to reproduce the major features of the experimentally obtained stress-strain relationships. In addition, stress relaxation of the membrane subjected to a fixed strain at room temperature fits time-dependent constitutive models used to describe nonlinear rubber elasticity. Thus, the experimental results suggest that even though PFSA is not an elastomer, the constitutive models developed for rubber-like behavior can be used for describing the ex situ ...


Statistical Model Of Defects In Al-H System, Min Ji, Cai-Zhuang Wang, Kai-Ming Ho, Saikat Adhikari, Kurt R. Hebert 2010 Iowa State University

Statistical Model Of Defects In Al-H System, Min Ji, Cai-Zhuang Wang, Kai-Ming Ho, Saikat Adhikari, Kurt R. Hebert

Chemical and Biological Engineering Publications

Vacancy and hydrogen concentrations in Al were determined by first-principles calculations and statistical-mechanics modeling, as functions of temperature and hydrogen chemical potential μH. Formation energies of Al vacancies, H interstitials, and H-Al vacancy complexes were obtained from first-principles calculations. The statistical-mechanics model incorporated these energies and included configurational entropy contributions through the grand canonical ensemble. We found that the hydrogen chemical potential under different chemical environments plays an important role in determining the relative equilibrium defect concentrations in the Al-H system. Estimates of the hydrogen chemical potential during hydrogen charging were obtained experimentally. At comparable the calculated concentrations are consistent ...


Development Of Innovative Load Transfer Mechanism To Reduce Hurricane-Induced Failures In New And Existing Residential Construction, Sheikh Saad Ahmed 2010 Florida International University

Development Of Innovative Load Transfer Mechanism To Reduce Hurricane-Induced Failures In New And Existing Residential Construction, Sheikh Saad Ahmed

FIU Electronic Theses and Dissertations

Implicit in current design practice of minimum uplift capacity, is the assumption that the connection's capacity is proportional to the number of fasteners per connection joint. This assumption may overestimate the capacity of joints by a factor of two or more and maybe the cause of connection failures in extreme wind events. The current research serves to modify the current practice by proposing a realistic relationship between the number of fasteners and the capacity of the joint. The research is also aimed at further development of non-intrusive continuous load path (CLP) connection system using Glass Fiber Reinforced Polymer (GFRP ...


Analysis Of Non-Covalent Interactions Between The Nanoparticulate Fillers And The Matrix Polymer As Applied To Shape Memory Performance, I. Sedat Gunes, Cesar Perez-Bolivar, Feina Cao, Guillermo A. Jimenez, Pavel Anzenbacher, Sadhan C. Jana 2010 University of Akron Main Campus

Analysis Of Non-Covalent Interactions Between The Nanoparticulate Fillers And The Matrix Polymer As Applied To Shape Memory Performance, I. Sedat Gunes, Cesar Perez-Bolivar, Feina Cao, Guillermo A. Jimenez, Pavel Anzenbacher, Sadhan C. Jana

Sadhan C Jana

Non-covalent interactions between filler particles and polyurethanes were investigated using fluorescence emission spectroscopy. The results were used in the analysis of shape memory (SM) performance of polyurethanes. Composites of shape memory polyurethane (SMPU) and carbon nanofiber (CNF), oxidized carbon nanofiber (ox-CNF), organoclay, silicon carbide, and carbon black were prepared from diphenylmethane diisocyanate, 1,4-butanediol, and poly(caprolactone) diol. It was revealed by fluorescence emission spectroscopy that primarily the urethane groups located in the hard segments of SMPU interacted with the polar functional groups on filler particles. A close correlation between the extent of non-covalent filler-matrix interactions, soft segment crystallinity, and ...


Ceas E-News 01.12.2010, College of Engineering and Applied Sciences 2010 Western Michigan University

Ceas E-News 01.12.2010, College Of Engineering And Applied Sciences

College of Engineering and Applied Sciences Newsletter

Eaton signs with CAViDS for future hybrid-electric drive lab at CEAS


East Bay Energy Consortium Meeting Minutes, January 11, 2010, East Bay Energy Consortium 2010 Roger Williams University

East Bay Energy Consortium Meeting Minutes, January 11, 2010, East Bay Energy Consortium

East Bay Energy Consortium Meeting Minutes

No abstract provided.


Thermal Robotic Arm Controlled Spraying Via Robotic Arm And Vision System, Dermot Breen 2010 Dublin Institute of Technology

Thermal Robotic Arm Controlled Spraying Via Robotic Arm And Vision System, Dermot Breen

Doctoral

The Tribology Surface Engineering industry is a worldwide multi billion euro industry with significant health and safety risks. The thermal spraying sector of this industry employs the technique of applying molten surface coating material to a substrate via a thermal spray process which is implemented either by manual spraying or pre-programmed robotic systems. The development of autonomous robotic systems for thermal spraying surface coating would significantly improve production and profitability over pre-programmed systems and improve health and safety over manual spraying. The aim of this research was to investigate and develop through software simulation, physical modelling and testing the development ...


Rfid-Enabled Inventory Control Optimization: A Proof Of Concept In A Small-To-Medium Retailer, H. Dane, Katina Michael, S. F. Wamba 2010 University of Wollongong

Rfid-Enabled Inventory Control Optimization: A Proof Of Concept In A Small-To-Medium Retailer, H. Dane, Katina Michael, S. F. Wamba

Dr Samuel Fosso Wamba

This study examines the impact of radio-frequency identification (RFID) technology on the inventory control practices of a small-to-medium retailer using a proof of concept (PoC) approach. The exploratory study was conducted using a single case study of a hardware retailer stocking 5000 product lines provided by 110 active suppliers. To analyze the present mode of operation, procedural documents, semi-structured interviews and a participant observation was conducted. The basis for the proof of concept was a future mode of operation using a quasi-experimental design. Results indicate that in a small-to-medium retail environment, RFID technology could act as a loss prevention mechanism ...


From Automatic Identification And Data Capture (Aidc) To “Smart Business Process”: Preparing For A Pilot Integrating Rfid, S. F. Wamba, E. Lefebvre, Y. Bendavid, L.. A. Lefebvre 2010 University of Wollongong

From Automatic Identification And Data Capture (Aidc) To “Smart Business Process”: Preparing For A Pilot Integrating Rfid, S. F. Wamba, E. Lefebvre, Y. Bendavid, L.. A. Lefebvre

Dr Samuel Fosso Wamba

This paper examines the underlying logic behind the rules configured in a RFID middleware to support “smart business processes” in one retail supply chain. Through a detailed investigation of the underlying business processes, we will demonstrate how businesses rules can be defined, configured and refined in a RFID middleware. The results confirm that RFID technology is not a “Plug and Play” solution. RFID middleware configuration will require a high level of customization. Finally, this study allows the improvement of our understanding of the real potential of RFID technology in the supply chain context.


Reinvestigation Of Liquefaction And Nonliquefaction Case Histories From The 1976 Tangshan Earthquake, Robb E.S. Moss, Robert Kayen, Liyuan Tong, Songyu Liu, Guojun Cai, Jiaer Wu 2010 California Polytechnic State University - San Luis Obispo

Reinvestigation Of Liquefaction And Nonliquefaction Case Histories From The 1976 Tangshan Earthquake, Robb E.S. Moss, Robert Kayen, Liyuan Tong, Songyu Liu, Guojun Cai, Jiaer Wu

Robb E. S. Moss, Ph.D. P.E. F.ASCE

A field investigation was carried out to retest liquefaction and nonliquefaction sites from the 1976 Tangshan earthquake in the People's Republic of China (PRC). These sites were carefully investigated in 1978/1979 using standard penetration test (SPT) and cone penetration test (CPT) equipment; however the CPT measurements are obsolete because of the now nonstandard cone that was used at the time. In 2007 a modern cone was mobilized to retest 18 select sites that are particularly valuable because they experienced intense ground shaking, have high fines content, and are classified as nonliquefaction sites. Of the sites reinvestigated and carefully ...


Reduced Uncertainty Of Ground Motion Prediction Equations Through Bayesian Variance Analysis, Robb E.S. Moss 2010 California Polytechnic State University - San Luis Obispo

Reduced Uncertainty Of Ground Motion Prediction Equations Through Bayesian Variance Analysis, Robb E.S. Moss

Robb E. S. Moss, Ph.D. P.E. F.ASCE

A ground motion prediction equation estimates the mean and variance of ground shaking with distance from an earthquake source. Current relationships use regression techniques that treat the input variables or parameters as exact, neglecting the uncertainties associated with the measurement of shear wave velocity, moment magnitude, and site-to-source distance. This parameter uncertainty propagates through the regression procedure and results in model uncertainty that overestimates the inherent variability of the ground motion. This report discusses methods of estimating the statistical uncertainty of the input parameters, and procedures for incorporating the parameter uncertainty into the regression of ground motion data using a ...


Evaluation Of Current Nonlinear Static Procedures For Concrete Buildings Using Recorded Strong-Motion Data, Rakesh K. Goel, Charles Chadwell 2010 California Polytechnic State University - San Luis Obispo

Evaluation Of Current Nonlinear Static Procedures For Concrete Buildings Using Recorded Strong-Motion Data, Rakesh K. Goel, Charles Chadwell

Rakesh K. Goel

This study evaluates current Nonlinear Static Procedures (NSPs) specified in the FEMA356, ASCE-41, ATC-40, and FEMA-440 documents using strong-motion data from reinforced-concrete buildings. For this purpose, three-dimensional computer models of five reinforced concrete buildings – Imperial County Services Building, Sherman Oaks Commercial Building, North Hollywood Hotel, Watsonville Commercial Building, and Santa Barbara Office Building – are developed. When appropriate, springs at the building’s base are included to account for the soil-structure interaction effects. These buildings are selected because they were strongly shaken, several deformed beyond their linear-elastic range, during past earthquakes and their recorded motions are available. The recorded motions are ...


Baffle Box Effectiveness Monitoring Report, Stormwater Academy 2010 University of Central Florida

Baffle Box Effectiveness Monitoring Report, Stormwater Academy

BMP Trains

No abstract provided.


Single-Scattering Optical Tomography: Simultaneous Reconstruction Of Scattering And Absorption, Lucia Florescu, Vadim A. Markel, John C. Schotland 2010 University of Pennsylvania

Single-Scattering Optical Tomography: Simultaneous Reconstruction Of Scattering And Absorption, Lucia Florescu, Vadim A. Markel, John C. Schotland

Departmental Papers (BE)

We report theory and numerical simulations that demonstrate the feasibility of simultaneous reconstruction of the three-dimensional scattering and absorption coefficients of a mesoscopic system using angularly resolved measurements of scattered light. Image reconstruction is based on the inversion of a generalized (broken ray) Radon transform relating the scattering and absorption coefficients of the medium to angularly resolved intensity measurements. Although the single-scattering approximation to the radiative transport equation (RTE) is used to devise the image reconstruction method, there is no assumption that only singly scattered light is measured. That is, no physical mechanism for separating single-scattered photons from the rest ...


P2y12 Or P2y1 Inhibitors Reduce Platelet Deposition In A Microfluidic Model Of Thrombosis While Apyrase Lacks Efficacy Under Flow Conditions, Maloney, Lawrence F. Brass, Scott L. Diamond 2010 University of Pennsylvania

P2y12 Or P2y1 Inhibitors Reduce Platelet Deposition In A Microfluidic Model Of Thrombosis While Apyrase Lacks Efficacy Under Flow Conditions, Maloney, Lawrence F. Brass, Scott L. Diamond

Departmental Papers (CBE)

Determination of the patient-specific response to antiplatelet agents facilitates proper dosing for both acute and chronic prophylaxis. "Closed" systems (with or without flow) may fail to predict pharmacological potency in situations where platelets rapidly accumulate under flow conditions at the site of thrombosis ("Open" systems). Using an 8-channel microfluidic flow assay of human whole blood with corn trypsin inhibitor (± PPACK) perfused over focul zones of collagen, dose-response curves were measured for pharmacological agents at a wall shear rate of 210 s-1. The P2Y1 inhibitor MRS 2179 (IC50 = 0.233 ± 0.132 µM) and P2Y12 inhibitor 2-MeSAMP ...


Rfid-Enabled Inventory Control Optimization: A Proof Of Concept In A Small-To-Medium Retailer, H. Dane, Katina Michael, S. F. Wamba 2010 University of Wollongong

Rfid-Enabled Inventory Control Optimization: A Proof Of Concept In A Small-To-Medium Retailer, H. Dane, Katina Michael, S. F. Wamba

Faculty of Informatics - Papers (Archive)

This study examines the impact of radio-frequency identification (RFID) technology on the inventory control practices of a small-to-medium retailer using a proof of concept (PoC) approach. The exploratory study was conducted using a single case study of a hardware retailer stocking 5000 product lines provided by 110 active suppliers. To analyze the present mode of operation, procedural documents, semi-structured interviews and a participant observation was conducted. The basis for the proof of concept was a future mode of operation using a quasi-experimental design. Results indicate that in a small-to-medium retail environment, RFID technology could act as a loss prevention mechanism ...


Electric-Field-Induced Antiferroelectric To Ferroelectric Phase Transition In Mechanically Confined Pb0.99nb0.02[(Zr0.57sn0.43)0.94ti0.06]0.98o3, Xiaoli Tan, Joshua C. Frederick, Cheng Ma, E. Aulbach, M. Marsilius, Wei Hong, T. Granzow, Wook Jo, J. Rödel 2010 Iowa State University

Electric-Field-Induced Antiferroelectric To Ferroelectric Phase Transition In Mechanically Confined Pb0.99nb0.02[(Zr0.57sn0.43)0.94ti0.06]0.98o3, Xiaoli Tan, Joshua C. Frederick, Cheng Ma, E. Aulbach, M. Marsilius, Wei Hong, T. Granzow, Wook Jo, J. Rödel

Materials Science and Engineering Publications

The electric-field-induced phase transition was investigated under mechanical confinements in bulk samples of an antiferroelectric perovskite oxide at room temperature. Profound impacts of mechanical confinements on the phase transition are observed due to the interplay of ferroelasticity and the volume expansion at the transition. The uniaxial compressive prestress delays while the radial compressive prestress suppresses it. The difference is rationalized with a phenomenological model of the phase transition accounting for the mechanical confinement.


Curvature-Driven Molecular Demixing In The Budding And Breakup Of Mixed Component Worm-Like Miscelles, Loverde M. Sharon, Vanessa Ortiz, Randall D. Kamien, Michael L. Klein, Dennis E. Discher 2010 University of Pennsylvania

Curvature-Driven Molecular Demixing In The Budding And Breakup Of Mixed Component Worm-Like Miscelles, Loverde M. Sharon, Vanessa Ortiz, Randall D. Kamien, Michael L. Klein, Dennis E. Discher

Departmental Papers (CBE)

Amphiphilic block copolymers of suitable proportions can self-assemble into surprisingly long and stable worm-like micelles, but the intrinsic polydispersity of polymers as well as polymer blending efforts and the increasing use of degradable chains all raise basic questions of curvature–composition coupling and morphological stability of these high curvature assemblies. Molecular simulations here of polyethylene glycol (PEG) based systems show that a systematic increase in the hydrated PEG fraction, in both monodisperse and binary blends, induces budding and breakup into spherical and novel ‘dumbbell’ micelles—as seen in electron microscopy images of degradable worm-like micelles. Core dimension, d, in our ...


Designing A Green Aircraft: Cal Poly's 2009 Undergraduate Aircraft Designs, Robert A. McDonald, Bruce Wright 2010 California Polytechnic State University, San Luis Obispo

Designing A Green Aircraft: Cal Poly's 2009 Undergraduate Aircraft Designs, Robert A. Mcdonald, Bruce Wright

Robert A. McDonald

The Cal Poly senior design class submitted six designs this year in response to the 2009 Undergraduate Team Aircraft Design Competition. This paper summarizes our experiences teaching design through this RFP and brings the student's insights together.


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