Now showing items 6-25 of 75

    • Can complex systems really be simulated? 

      Kalmar-Nagy, Tamas; Stanciulescu, Ilinca (2014)
      The simulation of complex systems is important in many fields of science and in real-world applications. Such systems are composed of many interacting subsystems. There might exist different software packages for simulating ...
    • Characterizing Dynamic Transitions Associated with Snap-Through of Clamped Shallow Arches 

      Chandra, Yenny; Wiebe, Richard; Stanciulescu, Ilinca; Virgin, Lawrence N.; Spottswood, Stephen M.; Eason, Thomas G. (2013)
      Slender curved structures can often be found as components of complex structures in civil, mechanical, and aerospace systems. Under extreme loadings, a curved structure might undergo snap-through buckling, i.e., the structure ...
    • Characterizing Dynamic Transitions Associated With Snap-Through: A Discrete System 

      Wiebe, R.; Virgin, L. N.; Stanciulescu, Ilinca; Spottswood, S.M.; Eason, T.G. (2012)
      Geometrically nonlinear structures often possess multiple equilibrium configurations. Under extreme conditions of excitation, it is possible for these structures to exhibit oscillations about and between these co-existing ...
    • A Closed-Form Technique for the Reliability and Risk Assessment of Wind Turbine Systems 

      Mensah, Akwasi F.; Dueñas-Osorio, Leonardo (2012)
      This paper proposes a closed-form method to evaluate wind turbine system reliability and associated failure consequences. Monte Carlo simulation, a widely used approach for system reliability assessment, usually requires ...
    • Combinatorial molecular optimization of cement hydrates 

      Qomi, M.J. Abdolhosseini; Krakowiak, K.J.; Bauchy, M.; Stewart, K.L.; Shahsavari, R.; Jagannathan, D.; Brommer, D.B.; Baronnet, A.; Buehler, M.J.; Yip, S.; Ulm, F.-J; Van Vliet, K.J.; Pellenq, R.J-.M. (2014)
      Despite its ubiquitous presence in the built environment, concrete's molecular-level properties are only recently being explored using experimental and simulation studies. Increasing societal concerns about concrete's ...
    • A compact mid-infrared dual-gas CH4/C2H6 sensor using a single interband cascade laser and custom electronics 

      Ye, Weilin; Zheng, Chuantao; Tittel, Frank K.; Sanchez, Nancy P.; Gluszek, Aleksander K.; Hudzikowski, Arkadiusz J.; Lou, Minhan; Dong, Lei; Griffin, Robert J. (2017)
      A compact mid-infrared (MIR) dual-gas sensor system was demonstrated for simultaneous detection of methane (CH4) and ethane (C2H6) using a single continuous-wave (CW) interband cascade laser (ICL) based on tunable laser ...
    • Compact solar autoclave based on steam generation using broadband light-harvesting nanoparticles 

      Neumann, Oara; Feronti, Curtis; Neumann, Albert D.; Dong, Anjie; Schell, Kevin; Lu, Benjamin; Kim, Eric; Quinn, Mary; Thompson, Shea; Grady, Nathaniel; Nordlander, Peter; Oden, Maria; Halas, Naomi J. (2013)
      The lack of readily available sterilization processes for medicine and dentistry practices in the developing world is a major risk factor for the propagation of disease. Modern medical facilities in the developed world ...
    • Compact TDLAS based sensor design using interband cascade lasers for mid-IR trace gas sensing 

      Dong, Lei; Tittel, Frank K.; Li, Chunguang; Sanchez, Nancy P.; Wu, Hongpeng; Zheng, Chuantao; Yu, Yajun; Sampaolo, Angelo; Griffin, Robert J. (2016)
      Two compact TDLAS sensor systems based on different structural optical cores were developed. The two optical cores combine two recent developments, gallium antimonide (GaSb)-based ICL and a compact multipass gas cell (MPGC) ...
    • Composition and Sources of Particulate Matter Measured near Houston, TX: Anthropogenic-Biogenic Interactions 

      Bean, Jeffrey K.; Faxon, Cameron B.; Leong, Yu Jun; Wallace, Henry William; Cevik, Basak Karakurt; Ortiz, Stephanie; Canagaratna, Manjula R.; Usenko, Sascha; Sheesley, Rebecca J.; Griffin, Robert J.; Ruiz, Lea Hildebrandt (2016)
      Particulate matter was measured in Conroe, Texas (~60 km north of downtown Houston, Texas) during the September 2013 DISCOVER-AQ campaign to determine the sources of particulate matter in the region. The measurement site ...
    • Computational modeling of the arterial wall based on layer-specific histological data 

      Jin, Tao; Stanciulescu, Ilinca (2016)
      Arterial walls typically have a heterogeneous structure with three different layers (intima, media, and adventitia). Each layer can be modeled as a fiber-reinforced material with two families of relatively stiff collagenous ...
    • Constraining ozone-precursor responsiveness using ambient measurements 

      Digar, Antara; Cohan, Daniel S.; Xiao, Xue; Foley, Kristen M.; Koo, Bonyoung; Yarwood, Greg (2013)
      This study develops probabilistic estimates of ozone (O3) sensitivities to precursor emissions by incorporating uncertainties in photochemical modeling and evaluating model performance based on ground-level observations ...
    • Critical Uncertainties and Gaps in the Environmental- and Social-Impact Assessment of the Proposed Interoceanic Canal through Nicaragua 

      Huete-Pérez, Jorge A.; Ortega-Hegg, Manuel; Urquhart, Gerald R.; Covich, Alan P.; Vammen, Katherine; Rittmann, Bruce E.; Miranda, Julio C.; Espinoza-Corriols, Sergio; Acevedo, Adolfo; Acosta, María L.; Gómez, Juan P.; Brett, Michael T.; Hanemann, Michael; Härer, Andreas; Incer-Barquero, Jaime; Joyce, Frank J.; Lauer, J. Wesley; Maes, Jean Michel; Tomson, Mason B.; Meyer, Axel; Montenegro-Guillén, Salvador; Whitlow, W. Lindsay; Schnoor, Jerald L.; Alvarez, Pedro J.J. (2016)
      The proposed interoceanic canal will connect the Caribbean Sea with the Pacific Ocean, traversing Lake Nicaragua, the major freshwater reservoir in Central America. If completed, the canal would be the largest infrastruc ...
    • CW DFB-QCL and EC-QCL based sensor for simultaneous NO and NO2 measurements via frequency modulation multiplexing using multi-pass absorption spectroscopy 

      Yu, Yajun; Sanchez, Nancy P.; Lou, Minhan; Zheng, Chuantao; Wu, Hongpeng; Głuszek, Aleksander K.; Hudzikowski, Arkadiusz J.; Griffin, Robert J.; Tittel, Frank K. (2017)
      Nitrogen oxides (NOx), including nitric oxide (NO) and nitrogen dioxide (NO2) play important roles in determining the photochemistry of the ambient atmosphere, controlling the production of tropospheric ozone, affecting ...
    • CW EC-QCL-based sensor for simultaneous detection of H2O, HDO, N2O and CH4ᅠusing multi-pass absorption spectroscopy 

      Yu, Yajun; Sanchez, Nancy P.; Griffin, Robert J.; Tittel, Frank K. (2016)
      A sensor system based on a continuous wave, external-cavity quantum-cascade laser (CW EC-QCL) was demonstrated for simultaneous detection of atmospheric H2O, HDO, N2O and CH4using a compact, dense pattern multi-pass gas ...
    • Differences in BVOC oxidation and SOA formation above and below the forest canopy 

      Schulze, Benjamin C.; Wallace, Henry W.; Flynn, James H.; Lefer, Barry L.; Erickson, Matt H.; Jobson, B. Tom; Dusanter, Sebastien; Griffith, Stephen M.; Hansen, Robert F.; Stevens, Philip S.; VanReken, Timothy; Griffin, Robert J. (2017)
      Gas-phase biogenic volatile organic compounds (BVOCs) are oxidized in the troposphere to produce secondary pollutants such as ozone (O3), organic nitrates (RONO2), and secondary organic aerosol (SOA). Two coupled ...
    • Direct calculation of critical points in parameter sensitive systems 

      Moghaddasie, Behrang; Stanciulescu, Ilinca (2013)
      At critical points along the equilibrium path, sudden and sometimes catastrophic changes in the structural behaviour are observed. The equilibrium path, load-bearing capacity and locations of critical points can be sensitive ...
    • Dynamic Lateral Stability of Elastomeric Seismic 2 Isolation Bearings 

      Vemuru, V.; Nagarajaiah, S.; Masroor, A.; Mosqueda, G. (2014)
      Predicting the response of elastomeric seismic isolation bearings when subjected to severe ground motions is challenging due to the highly nonlinear behavior associated with the bearings under a combination of large ...
    • Effect of Surface Friction on Tire-Pavement Contact Stresses during Vehicle Maneuvering 

      Wang, Hao; Al-Qadi, Imad L.; Stanciulescu, Ilinca (2013)
      Accurate modeling of tire-pavement contact behavior plays an important role in the analysis of pavement performance and vehicle stability control. A threedimensional (3-D) tire-pavement interaction model was developed using ...
    • Environmental Factors Associated With Natural Methane Occurrence in the Appalachian Basin 

      Molofsky, Lisa J.; Connor, John A.; McHugh, Thomas E.; Richardson, Stephen D.; Woroszylo, Casper; Alvarez, Pedro J. (2016)
      The recent boom in shale gas development in the Marcellus Shale has increased interest in the methods to distinguish between naturally occurring methane in groundwater and stray methane associated with drilling and production ...
    • Equilibria and stability boundaries of shallow arches under static loading in a thermal environment 

      Moghaddasie, Behrang; Stanciulescu, Ilinca (2013)
      The structural behaviour of shallow arches is complex and can be influenced by many parameters. In this paper, the response of a half-sine shallow arch under static loading in a thermal environment is investigated. The ...