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Articles 4111 - 4140 of 6327

Full-Text Articles in Engineering

Energy-Based Yield Criterion For Pmma From Large-Scale Molecular Dynamics Simulations, Eugenio Jaramillo, Nathaniel Wilson, Stephen Christensen, Jonathan Gosse, Alejandro Strachan Jan 2012

Energy-Based Yield Criterion For Pmma From Large-Scale Molecular Dynamics Simulations, Eugenio Jaramillo, Nathaniel Wilson, Stephen Christensen, Jonathan Gosse, Alejandro Strachan

Birck and NCN Publications

We use molecular dynamics (MD) with the DREIDING force field to characterize the ultimate mechanical response of amorphous poly(methyl methacrylate). We characterize how volumetric and deviatoric strains contribute to yield for a wide range of loading conditions from pure deviatoric, volume-conserving cases to isotropic volume expansion. We propose and apply an energy-based yield criterion to define yield consistently for all cases. Our results show that permanent deformation occurs when either the deviatoric or volumetric strains reach critical values, except in a narrow region around the transformation between deviatoric- and volumetric-dominated yield where the two strain invariants interact. In contrast, the …

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Optimization Of Power And Efficiency Of Thermoelectric Devices With Asymmetric Thermal Contacts, Kazuaki Yazawa, Ali Shakouri Jan 2012

Optimization Of Power And Efficiency Of Thermoelectric Devices With Asymmetric Thermal Contacts, Kazuaki Yazawa, Ali Shakouri

Birck and NCN Publications

We report the theoretical efficiency of thermoelectric power generation with asymmetric thermal contacts to reservoirs. A key ingredient is the electrical and thermal co-optimization. Generic formula of the maximum power output and the optimum leg length are obtained. The Curzon-Ahlborn limit at maximum power can be rigorously derived when the dimensionless figure-of-merit is very large for any asymmetric thermal contact resistances. The results differ from cyclic thermodynamic engines, and some of the reasons are discussed. We also point out the similarity and differences with single-level quantum dot heat engines, which assume no explicit thermal contact resistance with reservoirs. (C) 2012 …

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Computational Study Of Energy Filtering Effects In One-Dimensional Composite Nano-Structures, Raseong Kim, Mark S. Lundstrom Jan 2012

Computational Study Of Energy Filtering Effects In One-Dimensional Composite Nano-Structures, Raseong Kim, Mark S. Lundstrom

Birck and NCN Publications

Possibilities to improve the Seebeck coefficient S versus electrical conductance G trade-off of diffusive composite nano-structures are explored using an electro-thermal simulation framework based on the non-equilibrium Green's function method for quantum electron transport and the lattice heat diffusion equation. We examine the role of the grain size d, potential barrier height Phi(B), grain doping, and the lattice thermal conductivity kappa(L) using a one-dimensional model structure. For a uniform kappa(L), simulation results show that the power factor of a composite structure may be improved over bulk with the optimum Phi(B) being about k(B)T, where k(B) and T are the Boltzmann …

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Quantum-Hall Plateau-Plateau Transition In Top-Gated Epitaxial Graphene Grown On Sic (0001), T. Shen, A. T. Neal, M. L. Bolen, Jiangjiang Gu, L. W. Engel, Michael A. Capano, Peide D. Ye Jan 2012

Quantum-Hall Plateau-Plateau Transition In Top-Gated Epitaxial Graphene Grown On Sic (0001), T. Shen, A. T. Neal, M. L. Bolen, Jiangjiang Gu, L. W. Engel, Michael A. Capano, Peide D. Ye

Birck and NCN Publications

We investigate the low-temperature magneto-transport properties of monolayer epitaxial graphene films formed on the Si-face of semi-insulating 4H SiC substrates by a high-temperature sublimation process. A high-k top-gate on the epitaxial graphene is realized by inserting a fully oxidized nanometer-thin aluminum film as a seeding layer, followed by an atomic layer deposition process. At low temperatures, the devices demonstrate a strong field effect by the top gate with an on/off ratio of similar to 7 and an electron mobility up to similar to 3250 cm(2)/Vs. After the observation of the half-integer quantum-Hall effect for monolayer epitaxial graphene films, detailed magneto-transport …

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Can Morphology Tailoring Improve The Open Circuit Voltage Of Organic Solar Cells?, Biswajit Ray, M. S. Lundstrom, Muhammad A. Alam Jan 2012

Can Morphology Tailoring Improve The Open Circuit Voltage Of Organic Solar Cells?, Biswajit Ray, M. S. Lundstrom, Muhammad A. Alam

Birck and NCN Publications

While the effect of interfacial morphology on the short circuit current (ISC) of organic photovoltaic devices (OPVs) is well known, its impact on open circuit voltage (VOC) and fill-factor (FF) are less clear. Since the output power of a solar cell Pout = ISCVOCFF, such understanding is critical for designing high-performance, morphology-engineered OPVs. In this letter, we provide an explicit analytical proof that any effort to radically improve VOC by tailoring bulk heterojunction morphology is futile, because any increase in ISC due to larger interface area is counterbalanced by corresponding increase …

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Laser Direct Growth Of Graphene On Silicon Substrate, Dapeng Wei, Xianfan Xu Jan 2012

Laser Direct Growth Of Graphene On Silicon Substrate, Dapeng Wei, Xianfan Xu

Birck and NCN Publications

We demonstrate laser direct growth of few layer graphene on a silicon substrate. In our study, a continuous wave laser beam was focused on a poly(methyl methacrylate) (PMMA)-coated silicon wafer to evaporate PMMA and melt the silicon wafer. Carbon atoms, decomposed from PMMA, were absorbed by the molten silicon surface, and then separated from silicon in the cooling process to form few-layer graphene. This Si-catalyzed method will provide a new approach and platform for applications of graphene. (C) 2012 American Institute of Physics. [doi: 10.1063/1.3675636]

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Is Adding The E Enough?: Investigating The Impact Of K-12 Engineering Standards On The Implementation Of Stem Integration., Gillian H. Roehrig, Tamara J. Moore, Hui-Hui Wang, Mi Sun Park Jan 2012

Is Adding The E Enough?: Investigating The Impact Of K-12 Engineering Standards On The Implementation Of Stem Integration., Gillian H. Roehrig, Tamara J. Moore, Hui-Hui Wang, Mi Sun Park

School of Engineering Education Faculty Publications

The problems that we face in our ever-changing, increasingly global society are multidisciplinary, and many require the integration of multiple science, technology, engineering, and mathematics (STEM) concepts to solve them. National calls for improvement of STEM education in the United States are driving changes in policy, particularly in academic standards. Research on STEM integration in K-12 classrooms has not kept pace with the sweeping policy changes in STEM education. This study addresses the need for research to explore the translation of broad, national-level policy statements regarding STEM education and integration to state-level policies and implementation in K-12 classrooms. An interpretive …

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Gaining Insight Into The Physics Of Dynamic Atomic Force Microscopy In Complex Environments Using The Veda Simulator, Daniel Kiracofe, John Melcher, Arvind Raman Jan 2012

Gaining Insight Into The Physics Of Dynamic Atomic Force Microscopy In Complex Environments Using The Veda Simulator, Daniel Kiracofe, John Melcher, Arvind Raman

Birck and NCN Publications

Dynamic atomic force microscopy (dAFM) continues to grow in popularity among scientists in many different fields, and research on new methods and operating modes continues to expand the resolution, capabilities, and types of samples that can be studied. But many promising increases in capability are accompanied by increases in complexity. Indeed, interpreting modern dAFM data can be challenging, especially on complicated material systems, or in liquid environments where the behavior is often contrary to what is known in air or vacuum environments. Mathematical simulations have proven to be an effective tool in providing physical insight into these non-intuitive systems. In …

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Full Band Atomistic Modeling Of Homo-Junction Ingaas Band-To-Band Tunneling Diodes Including Band Gap Narrowing, Woo-Suhl Cho, Mathieu Luisier, Dheeraj Mohata, Suman Datta, David Pawlik, Sean L. Rommel, Gerhard Klimeck Jan 2012

Full Band Atomistic Modeling Of Homo-Junction Ingaas Band-To-Band Tunneling Diodes Including Band Gap Narrowing, Woo-Suhl Cho, Mathieu Luisier, Dheeraj Mohata, Suman Datta, David Pawlik, Sean L. Rommel, Gerhard Klimeck

Birck and NCN Publications

A homo-junction In0.53Ga0.47As tunneling diode is investigated using full-band, atomistic quantum transport approach based on a tight-binding model (TB) and the Non-equilibrium Green’s Function formalism. Band gap narrowing (BGN) is included in TB by altering its parameters using the Jain-Roulston model. BGN is found to be critical in the determination of the current peak and the second turn-on in the forward bias region. An empirical excess current that mimics additional recombination paths must be added to the calculation to model the diode behavior in the valley current region. Overall the presented model reproduces experimental data well.

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Artl@ S And Basart: A Loose Coupling Strategy For Digital Humanities, Sorin Matei Jan 2012

Artl@ S And Basart: A Loose Coupling Strategy For Digital Humanities, Sorin Matei

Cyber Center Publications

The core ARTL@S digital humanities
strategy is that of loosely coupling
resources, platforms, and use scenarios.
A number of sites will feed from
the same geodatabase (BasArt),
which will be enriched by users with
new content. Inspired by the Web 2.0
design principles, ARTL@S relies on
the BasArt API, which will enable an
ecosystem of sites to use primary
data to generate their own maps,
charts, and tables. A variety of economic
models will also be used to
support the site, from free to paybased.
User-generated content will be
monitored by data management and
curation techniques that will ensure
the …

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Authenticated Top-K Aggregation In Distributed And Authenticated Top-K Aggregation In Distributed And, Sunoh Choi, Hyo-Sang Lim, Elisa Bertino Jan 2012

Authenticated Top-K Aggregation In Distributed And Authenticated Top-K Aggregation In Distributed And, Sunoh Choi, Hyo-Sang Lim, Elisa Bertino

Cyber Center Publications

Top-k queries have attracted interest in many different areas like network and system monitoring, information retrieval, sensor networks, and so on. Since today many applications issue top-k queries on distributed and outsourced databases,
authentication of top-k query results becomes more important. This paper addresses the problem of authenticated top-k aggregation queries (e.g. “find the k objects with the highest aggregate values”) in a distributed system. We propose a new algorithm, called Authenticated Three Phase Uniform Threshold (A-TPUT), which provides not only efficient top-k aggregation over distributed databases but also authentication on the top-k results. We also introduce several enhancements for …

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Self-Assembly Of Single Dielectric Nanoparticle Layers And Integration In Polymer-Based Solar Cells, Jonathan E. Allen, Biswajit Ray, Mohammad R. Khan, Kevin G. Yager, Muhammad Ashraful Alam, Charles T. Black Jan 2012

Self-Assembly Of Single Dielectric Nanoparticle Layers And Integration In Polymer-Based Solar Cells, Jonathan E. Allen, Biswajit Ray, Mohammad R. Khan, Kevin G. Yager, Muhammad Ashraful Alam, Charles T. Black

Birck and NCN Publications

A single, self-assembled layer of highly uniform dielectric alumina nanoparticles improves the photovoltaic performance of organic semiconductor bulk heterojunction solar cells. The block copolymer based self-assembly approach is readily amenable to the large areas required for solar cell fabrication. A fraction of the performance gain results from incident light scattering which increases active layer absorption and photocurrent output, consistent with device simulations. The nanoparticle layer also roughens the device electrode surface, increasing contact area and improving device fill factor through more efficient charge collection

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Feasibility, Accuracy, And Performance Of Contact Block Reduction Method For Multi-Band Simulations Of Ballistic Quantum Transport, Hoon Ryu, Hong-Hyun Park, Mincheol Shin, Dragica Vasileska, Gerhard Klimeck Jan 2012

Feasibility, Accuracy, And Performance Of Contact Block Reduction Method For Multi-Band Simulations Of Ballistic Quantum Transport, Hoon Ryu, Hong-Hyun Park, Mincheol Shin, Dragica Vasileska, Gerhard Klimeck

Birck and NCN Publications

Numerical utilities of the contact block reduction (CBR) method in evaluating the retarded Green’s function are discussed for 3D multi-band open systems that are represented by the atomic tight-binding (TB) and continuum k * p (KP) band model. It is shown that the methodology to approximate solutions of open systems, which has been already reported for the single-band effective mass model, cannot be directly used for atomic TB systems, since the use of a set of zinc blende crystal grids makes the inter-coupling matrix non-invertible. We derive and test an alternative with which the CBR method can be still practical …

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Extreme Strain Localization And Sliding Friction In Physically Associating Polymer Gels, Kendra Erk, Jeffrey D. Martin, Y. Thomas Hu, Kenneth R. Shull Jan 2012

Extreme Strain Localization And Sliding Friction In Physically Associating Polymer Gels, Kendra Erk, Jeffrey D. Martin, Y. Thomas Hu, Kenneth R. Shull

School of Materials Engineering Faculty Publications

Model physically associating gels deformed in shear over a wide range of reduced rates displayed evidence of strain localization. The non-linear stress responses and inhomogeneous velocity profiles observed during shear rheometry coupled with particle tracking velocimetry were associated with the occurrence of rate-dependent, banding and fracture-like responses in the gel. Scaling law analysis from traditional sliding friction studies suggests that at the molecular level, deformation is confined to a shear zone with thickness comparable to the gel’s mesh size, the smallest structurally relevant length scale in the gel.

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Sectionality Or Why Section Determines Grades: An Exploration Of Engineering Core Course Section Grades Using A Hierarchical Linear Model And The Multiple-Institution Database For Investigating Engineering Longitudinal Development, George Dante Ricco, Noah Salzman, Russell A. Long, Matthew Ohland Jan 2012

Sectionality Or Why Section Determines Grades: An Exploration Of Engineering Core Course Section Grades Using A Hierarchical Linear Model And The Multiple-Institution Database For Investigating Engineering Longitudinal Development, George Dante Ricco, Noah Salzman, Russell A. Long, Matthew Ohland

School of Engineering Education Graduate Student Series

No abstract provided.

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Low-Ses First-Generation Students’ Decision To Pursue Engineering, Michele L. Strutz, Matthew Ohland Jan 2012

Low-Ses First-Generation Students’ Decision To Pursue Engineering, Michele L. Strutz, Matthew Ohland

School of Engineering Education Graduate Student Series

The ability of this nation to provide a growing economy, strong health and human services, and a secure and safe nation depends upon a vibrant, creative, and diverse engineering and science workforce” (Blue, et al., 2005, p. 4). To address these global opportunities and challenges, and for the U.S. to remain globally competitive, it is necessary for our engineering workforce to be diverse.Nevertheless, the U.S. cannot claim a diverse engineering workforce, and its engineering student bodies are certainly not diverse despite the legislation and programs put in place to increase racial, gender, and socioeconomic (SES) representation. Programs and resources that …

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Exploring Cyberlearning Through A Nsf Lens, Jeremi Shavonda London Jan 2012

Exploring Cyberlearning Through A Nsf Lens, Jeremi Shavonda London

School of Engineering Education Graduate Student Series

Phrases like “Let’s Google it” and “Text me” are familiar to the youth of today. Though simple, the phrases speak to a greater reality—the use of computing technology and high-speed communication is ubiquitous. The pervasive use of technology opens up new opportunities for undergraduate STEM education. The NSF Task force on Cyberlearning defines cyberlearning as“the use of networked computing and communications technologies to support learning” (2008,p5). Since the full potential of cyberlearning has not been fully realized in undergraduate education, Program Officers in the Division of Undergraduate Education (DUE) at the National Science Foundation (NSF) are interested in exploring the …

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Measuring Undergraduate Student Perceptions Of The Impact Of Project Lead The Way, Noah Salzman, Eric L. Mann, Matthew Ohland Jan 2012

Measuring Undergraduate Student Perceptions Of The Impact Of Project Lead The Way, Noah Salzman, Eric L. Mann, Matthew Ohland

School of Engineering Education Graduate Student Series

A survey was distributed to the entire undergraduate student body at a large public university on students’ experiences in Project Lead The Way, a popular middle school and high school technology and engineering program. The survey included demographic questions including academic major, questions on which PLTW classes the students took in high school, and Likert-type ratings of those experiences.Of the responses to the survey (n=575), slightly fewer than half (n=252) indicated that they had participated in PLTW classes in high school. Approximately half of the respondents were majoring in engineering, one quarter in engineering technology, and the rest were distributed …

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Scaffolding Undergraduate Engineering Design Education With The Wellbeing Framework, Lindsey Anne Nelson Jan 2012

Scaffolding Undergraduate Engineering Design Education With The Wellbeing Framework, Lindsey Anne Nelson

School of Engineering Education Graduate Student Series

Increasingly, engineering design educators articulate wanting to embed social sustainability into student projects. Some educators observe that global calls, such as the Grand Challenges of Engineering and the Millennium Development Goals, foster social consciousness while supporting open innovation environments. Using a broad social goal like “poverty alleviation” to frame a course design challenge can help students connect engineering design processes to messages that proclaim engineering as a socially engaged profession [1]. Yet scaffolding student learning in engineering design for poverty alleviation should involve more than a simple directive to create a device for a poor person. The purpose of this …

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Direct Measurements And Numerical Simulations Of Gas Charging In Microelectromechanical System Capacitive Switches, A Venkattraman, A Garg, D Peroulis, Alina A. Alexeenko Jan 2012

Direct Measurements And Numerical Simulations Of Gas Charging In Microelectromechanical System Capacitive Switches, A Venkattraman, A Garg, D Peroulis, Alina A. Alexeenko

School of Aeronautics and Astronautics Faculty Publications

Gas breakdown in microelectromechanical system capacitive switches is demonstrated using high resolution current measurements and by particle-in-cell/Monte Carlo collision (PIC/MCC) simulations. Measurements show an electric current through a 3 μm air gap increasing exponentially with voltage, starting at 60 V. PIC/MCC simulations with Fowler-Nordheim [Proc. R. Soc. London, Ser. A 119, 173 (1928)] field emission reveal self-sustained discharges with significant ion enhancement and a positive space charge. The effective ion-enhanced field emission coefficient increases with voltage up to about 0.3 with an electron avalanche occurring at 159 V. The measurements and simulations demonstrate a charging mechanism for microswitches …

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A Comparative Study Of No-Time-Counter And Majorant Collision Frequency Numerical Schemes In Dsmc, A Venkattraman, Alina A. Alexeenko, M A. Gallis, M S. Ivanov Jan 2012

A Comparative Study Of No-Time-Counter And Majorant Collision Frequency Numerical Schemes In Dsmc, A Venkattraman, Alina A. Alexeenko, M A. Gallis, M S. Ivanov

School of Aeronautics and Astronautics Faculty Publications

The direct simulation Monte Carlo (DSMC) method is a stochastic approach to solve the Boltzmann equation and is built on various numerical schemes for transport, collision and sampling. This work aims to compare and contrast two popular O(N) DSMC collision schemes - no-time-counter (NTC) and majorant collision frequency (MCF) - with the goal of identifying the fundamental differences. MCF and NTC schemes are used in DSMC simulations of a spatially homogeneous equilibrium gas to study convergence with respect to various collision parameters. While the MCF scheme forces the reproduction of the exponential distribution of time between collisions, …

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Scaling Law For Direct Current Field Emission-Driven Microscale Gas Breakdown, A Venkattraman, Alina A. Alexeenko Jan 2012

Scaling Law For Direct Current Field Emission-Driven Microscale Gas Breakdown, A Venkattraman, Alina A. Alexeenko

School of Aeronautics and Astronautics Faculty Publications

The effects of field emission on direct current breakdown in microscale gaps filled with an ambient neutral gas are studied numerically and analytically. Fundamental numerical experiments using the particle-in-cell/Monte Carlo collisions method are used to systematically quantify microscale ionization and space-charge enhancement of field emission. The numerical experiments are then used to validate a scaling law for the modified Paschen curve that bridges field emission-driven breakdown with the macroscale Paschen law. Analytical expressions are derived for the increase in cathode electric field, total steady state current density, and the ion-enhancement coefficient including a new breakdown criterion. It also includes the …

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Assessment Of High-Enthalpy Air Chemistry Models For Hypervelocity Ground-Based Experiments, Marat Kulakhmetov, Yevgeniy A. Bondar, Mikhail S. Ivanov, Alina A. Alexeenko Jan 2012

Assessment Of High-Enthalpy Air Chemistry Models For Hypervelocity Ground-Based Experiments, Marat Kulakhmetov, Yevgeniy A. Bondar, Mikhail S. Ivanov, Alina A. Alexeenko

School of Aeronautics and Astronautics Faculty Publications

Hypersonic vehicles re-entering Earth's atmosphere with orbital velocities generate gas flows with significant thermo-chemical non-equilibrium. Detailed kinetics of chemical reactions at such conditions is still not well understood but it may affect vehicle's thermal loads, aerodynamic moments and thermal radiation. This work assesses the Total Collision Energy (TCE) and the Kuznetsov-based state specific (KSS) chemical reaction models at pressures between 1 and 50 torr and velocities between 4 and 10 km/s in order to identify best test conditions for validating the models. Hypersonic flows at such conditions can be studied at the hypervelocity impact range facilities.

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A Runge-Kutta Discontinuous Galerkin Solver For 2d Boltzmann Model Equations: Verification And Analysis Of Computational Performance, Wei Su, Alina A. Alexeenko, Guobiao Cai Jan 2012

A Runge-Kutta Discontinuous Galerkin Solver For 2d Boltzmann Model Equations: Verification And Analysis Of Computational Performance, Wei Su, Alina A. Alexeenko, Guobiao Cai

School of Aeronautics and Astronautics Faculty Publications

The high-order Runge-Kutta discontinuous Galerkin (DG) method is extended to the 2D kinetic model equations describing rarefied gas flows. A DG-type discretization of the equilibrium velocity distributions is formulated for the Bhatnagar-Gross-Krook and ellipsoidal statistical models which enforce a weak conservation of mass, momentum and energy in the collision relaxation term. The RKDG solutions have up to 3rd-order spatial accuracy and up to 4th-order time accuracy. Verification is carried out for a steady 1D Couette flow and a 2D thermal conduction problem by comparison with DSMC and analytical solutions. The computational performance of the RKDG method …

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Pvc Stay-In-Place Panel Covers For Tilt-Up And Pre-Cast Construction, Purdue Ect Team Jan 2012

Pvc Stay-In-Place Panel Covers For Tilt-Up And Pre-Cast Construction, Purdue Ect Team

ECT Fact Sheets Archive

Octaform™ stay-in-place concrete forming system is PVC insulated concrete form system. These forms have been used in the industry for various applications to improve the insulation and corrosion resistance of structures. Octaform™ has developed the panel covers so the advantages of PVC stay-in-place concrete forming systems could be applied to tilt-up and pre-cast construction.

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Conx Chassis System, Purdue Ect Team Jan 2012

Conx Chassis System, Purdue Ect Team

ECT Fact Sheets Archive

Often referred to as a full-scale “Erector Set”, the ConX System applies technology to the building industry resulting in dramatic efficiencies. The systems approach is made possible by employing automated and efficient processes, from design through fabrication, shipping, and field assembly.

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Nightbreeze™: Integrated Heating, Ventilation And Cooling System, Purdue Ect Team Jan 2012

Nightbreeze™: Integrated Heating, Ventilation And Cooling System, Purdue Ect Team

ECT Fact Sheets Archive

NightBreeze™ provides ventilation cooling automatically, eliminating the necessity of operating windows. NightBreeze™ uses the heating/air conditioning system fan to bring in filtered outside air and flush out warm, stale indoor air. The system also allows you to select the lowest temperature you want the house to reach overnight.

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Cmic Xprojects, Purdue Ect Team Jan 2012

Cmic Xprojects, Purdue Ect Team

ECT Fact Sheets Archive

xProjects is a cloud based collaboration and project management solution that resolves the interoperability issues associated with integrated project delivery (IPD) and electrifies the IPD process by enabling capital project owners to collaborate seamlessly with multiple project stakeholders. Using XML adapters to create connections between systems, CMiC Real Time Integration (RTI) tags data so it can be transferred bi-directionally between participants within the project ecosystem with no loss of information or the need for re-entry.

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Autodesk Buzzsaw®, Purdue Ect Team Jan 2012

Autodesk Buzzsaw®, Purdue Ect Team

ECT Fact Sheets Archive

Autodesk® Buzzsaw® is a software solution enabling the successful execution of construction projects through a central database, collaboration and communication with access control. The software has capacities of exchanging and viewing drawings, schedule reminders and specifications. Users can directly comment on AutoCAD drawings with the date of comment and name of commenter displayed.

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Bidtool.Net: An Integrated Web-Based Approach For Commercial Bid Data Management And Networking, Purdue Ect Team Jan 2012

Bidtool.Net: An Integrated Web-Based Approach For Commercial Bid Data Management And Networking, Purdue Ect Team

ECT Fact Sheets Archive

BidTool is basically a web-based portal that allows the distribution and transfer of key commercial construction project data. Owners, architects, designers, engineers, estimators, contractors, material suppliers & construction professionals find track and manage everything from architectural plans specifications and renderings to action items and scheduling requirements such as bid due dates, pre bid meetings and bid results.

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