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Using A Quality Based Analytic Hierarchy Process To Do Decision-Making Analysis In Transportation, Dejing Kong Dec 2010

Using A Quality Based Analytic Hierarchy Process To Do Decision-Making Analysis In Transportation, Dejing Kong

Department of Industrial and Management Systems Engineering: Dissertations, Theses, and Student Research

The automated identification technology, Radio Frequency Identification (RFID), provides the potential to reduce costs in the transportation operations. Local Department of Transportation (DOT) offices have to carefully consider technologies such as RFID when considering their use for operation such as Right of Way (ROW) property control. ROW operations require strategic planning in that inventory and access rights can be contestable in a myriad of situations. This research investigates the comprehensive impacts of using RFID systems for ROW inventory tracking. We utilize the House of Quality as a means to integrating strategic shareholders needs and their impact on the measurement of …

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Characterization Of Anti-Proteolytic And Anti-Proliferative Activities Of Pentagalloylglucose; Its Potential Application As A Therapeutic Agent In Vascular Diseases, Chaitra Cheluvaraju Dec 2010

Characterization Of Anti-Proteolytic And Anti-Proliferative Activities Of Pentagalloylglucose; Its Potential Application As A Therapeutic Agent In Vascular Diseases, Chaitra Cheluvaraju

All Dissertations

Cardiovascular diseases are the leading causes of mortality in the United States and will cost around $500 billion this year alone. Elevated proteolytic activity, increased proliferation and migration of vascular smooth muscle cells are hallmarks of atherosclerosis, stenosis and aortic aneurysms. These diseases often manifest the transdifferentiation of vascular smooth muscle cells into osteoblast-like cells followed by deposition of hydroxyapatite–like mineral in the arterial walls.
Currently, there are no standard treatments available for vascular calcification or aneurysms. Atherosclerosis treatment options are limited to statins while balloon angioplasty and stenting – surgical procedures for stenosis, often end in restenosis. Therefore, we …

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Sensitivity Analysis Of Uranium Speciation Modeling In Groundwater Systems With A Focus On Mobility, Andrew Scott Dec 2010

Sensitivity Analysis Of Uranium Speciation Modeling In Groundwater Systems With A Focus On Mobility, Andrew Scott

All Dissertations

Uranium is an important natural resource used in production of nuclear reactor fuel and nuclear weapons. The mining and processing of uranium has left a legacy of environmental contamination that remains to be addressed. There has been considerable interest in manipulating the oxidation state of uranium in order to put it into an environmentally immobile form. Uranium forms two stable oxidation states in nature, uranium (IV) being much less soluble than uranium (VI), and therefore the preferred state with regard to limiting the potential exposure of man. One of the tools used in evaluating potential effects of manipulating the natural …

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Pulsed-Laser Direct Writing Of Biological Materials, Yafu Lin Dec 2010

Pulsed-Laser Direct Writing Of Biological Materials, Yafu Lin

All Dissertations

Laser direct writing, developed based on modified laser-induced forward transfer (LIFT), has been emerging as one of the most promising biofabrication techniques. While some studies have been conducted to investigate laser direct writing of biological materials, there are some key challenges such as mechanisms of bubble formation, droplet formation and process-induced cell injury that have not been well elucidated. The objective of this dissertation is to study laser-induced droplet formation dynamics and process-induced cell injury in pulsed-laser direct writing of biological materials, and improve the existing laser direct-write techniques.
Phase explosion is identified as the dominant bubble formation mechanism in …

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Modulated Properties Of Fully Absorbable Bicomponent Meshes, Shawn Peniston Dec 2010

Modulated Properties Of Fully Absorbable Bicomponent Meshes, Shawn Peniston

All Dissertations

Current meshes used for soft-tissue repair are mostly composed of single component, nonabsorbable yarn constructions, limiting the ability to modulate their properties. This situation has left the majority of soft tissue repair load-bearing applications to suffer distinctly from undesirable features associated, in part, with mesh inability to (1) possess short-term stiffness to facilitate tissue stability during the development of wound strength; (2) gradually transfer the perceived mechanical load as the wound builds mechanical integrity; and (3) provide compliance with load transfer to the remodeling and maturing mesh/tissue complex. The likelihood of long-term complications is reduced for fully absorbable systems with …

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Modeling Microbial And Nutrient Dynamics In Zero-Discharge Aquaculture Systems, Kendall Kirk Dec 2010

Modeling Microbial And Nutrient Dynamics In Zero-Discharge Aquaculture Systems, Kendall Kirk

All Dissertations

A finite element, finite difference model was developed to predict nutrient and microbial dynamics in recirculating aquaculture systems. Total ammonia nitrogen, nitrite, nitrate, chemical oxygen demand, and dissolved oxygen concentrations are predicted in addition to growth and decay of algae, Nitrosomonas, Nitrobacter, denitrifying heterotrophs, and aerobic heterotrophs. Inputs to the model include temperature, photosynthetically available radiation, feed application rate, pH, aeration/mixing energy, water exchange configuration, water exchange rate, tilapia biomass, and dissolved oxygen concentration. Up to 10 exchanged units may be included, user-definable as continuous stirred tank reactors or sequencing batch reactors. Demonstration of the model's utility was demonstrated through …

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Bemdec: An Adaptive And Robust Methodology For Digital Image Feature Extraction, Isaac Kueth Gang Dec 2010

Bemdec: An Adaptive And Robust Methodology For Digital Image Feature Extraction, Isaac Kueth Gang

Dissertations

The intriguing study of feature extraction, and edge detection in particular, has, as a result of the increased use of imagery, drawn even more attention not just from the field of computer science but also from a variety of scientific fields. However, various challenges surrounding the formulation of feature extraction operator, particularly of edges, which is capable of satisfying the necessary properties of low probability of error (i.e., failure of marking true edges), accuracy, and consistent response to a single edge, continue to persist. Moreover, it should be pointed out that most of the work in the area of feature …

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Extracting Physical Ic Models Using Near-Field Scanning, Zhenwei Yu, Jayong Koo, Jason A. Mix, Kevin Slattery, Jun Fan Dec 2010

Extracting Physical Ic Models Using Near-Field Scanning, Zhenwei Yu, Jayong Koo, Jason A. Mix, Kevin Slattery, Jun Fan

Electrical and Computer Engineering Faculty Research & Creative Works

Accurate modeling of chip and chip-package is critical for EMI (Electromagnetic Interference) and RFI (RF Interference) analysis and prediction. in this paper, a model based on an array of dipoles from near-field measurement is proposed. a simple active circuit is simulated in a 3-D full-wave simulation tool, and the dipole model is calculated from the near-field data in the simulation using inverse method with regularization technique. This model has clear physical meaning, and it is validated using field at another place. ©2010 IEEE.

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An Equivalent Three-Dipole Model For Ic Radiated Emissions Based On Tem Cell Measurements, Siming Pan, Jingook Kim, Sungnam Kim, Jaesu Park, Heoncheol Oh, Jun Fan Dec 2010

An Equivalent Three-Dipole Model For Ic Radiated Emissions Based On Tem Cell Measurements, Siming Pan, Jingook Kim, Sungnam Kim, Jaesu Park, Heoncheol Oh, Jun Fan

Electrical and Computer Engineering Faculty Research & Creative Works

An equivalent dipole model is proposed in this paper to represent the source of radiated electromagnetic emissions from an integrated circuit (IC). the height of an IC is usually much smaller than its length and width, so only three dipole moments are sufficient to characterize an IC in terms of its electromagnetic emissions. the dipole moments can be extracted from three TEM cell measurements. the radiated fields from the IC can then be calculated based on the extracted dipole sources. This IC emission model with three dipole moments is validated using the far-field measurements in a semi anechoic chamber for …

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A Structure First Image Inpainting Approach Based On Self-Organizing Map (Som), Bo Chen, Zhaoxia Wang, Ming Bai, Quan Wang, Zhen Sun Dec 2010

A Structure First Image Inpainting Approach Based On Self-Organizing Map (Som), Bo Chen, Zhaoxia Wang, Ming Bai, Quan Wang, Zhen Sun

Research Collection School Of Computing and Information Systems

This paper presents a structure first image inpainting method based on self-organizing map (SOM). SOM is employed to find the useful structure information of the damaged image. The useful structure information which includes relevant edges of the image is used to simulate the structure information of the lost or damaged area in the image. The structure information is described by distinct or indistinct curves in an image in this paper. The obtained target curves separate the damaged area of the image into several parts. As soon as each part of the damaged image is restored respectively, the damaged image is …

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Polymer (Su-8) Optofluidic Device With Embedded Hydrogel Oxygen Sensing Elements, Zhan Gao, David B. Henthorn, Chang-Soo Kim Dec 2010

Polymer (Su-8) Optofluidic Device With Embedded Hydrogel Oxygen Sensing Elements, Zhan Gao, David B. Henthorn, Chang-Soo Kim

Chemical and Biochemical Engineering Faculty Research & Creative Works

The SU-8 photopolymer is an excellent alternative for traditional materials used in fluidic devices such as glass- or silicon-Based inorganic materials. We describe a new chemically anchored, lithographically patterned hydrogel sensing element embedded in a completed SU-8 fluidic channel structure after the channel bonding process. Polyethylene glycol (PEG) hydrogel films incorporating oxygen-responsive ruthenium-complex fluorophores are grafted and patterned by photopolymerization of solution-phase precursors on the modified SU-8 channel surface. the optofluidic sensing platform with this embedded sensing elements exhibited excellent performance in measuring dissolved oxygen content. a unique advantage of this method is the selective growth of various functional films …

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Singular Value Decomposition Metrics Show Limitations Of Detector Design In Diffuse Fluorescence Tomography, Frederic Leblond, Kenneth M. Tichauer, Brian W. Pogue Dec 2010

Singular Value Decomposition Metrics Show Limitations Of Detector Design In Diffuse Fluorescence Tomography, Frederic Leblond, Kenneth M. Tichauer, Brian W. Pogue

Dartmouth Scholarship

The spatial resolution and recovered contrast of images reconstructed from diffuse fluorescence tomography data are limited by the high scattering properties of light propagation in biological tissue. As a result, the image reconstruction process can be exceedingly vulnerable to inaccurate prior knowledge of tissue optical properties and stochastic noise. In light of these limitations, the optimal source-detector geometry for a fluorescence tomography system is non-trivial, requiring analytical methods to guide design. Analysis of the singular value decomposition of the matrix to be inverted for image reconstruction is one potential approach, providing key quantitative metrics, such as singular image mode spatial …

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Fibronectin For Use In Hemostats And Wound Stabilization In Trauma, Mohammed Halhouli Nov 2010

Fibronectin For Use In Hemostats And Wound Stabilization In Trauma, Mohammed Halhouli

Department of Chemical and Biomolecular Engineering: Dissertations, Theses, and Student Research

Exploring the phase during wound healing when fibrinogen (FBG) and fibronectin (FN) interact forming a small thin layer for cells to migrate and proliferate at the injury site is necessary for the primary building blocks and initial stages of skin recovery. The aim of this thesis is to illustrate that administrating a reasonable amount of (FN) and FBG, in a semi-organizational technique, to the wound site will encourage cell population and ECM formation, as well as, improve the wound healing process. WE hypothesized that FBG and FN interactions will configure the construction of dermal cells and their final fate to …

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The Investment Comparison Tool (Ict): A Method To Assess Research And Development Investments, Tiffany A. Sargent, Robert G. Sargent Nov 2010

The Investment Comparison Tool (Ict): A Method To Assess Research And Development Investments, Tiffany A. Sargent, Robert G. Sargent

Electrical Engineering and Computer Science - All Scholarship

This paper presents a software tool (the Investment Comparison Tool), a methodology (the Investment Comparison Methodology), and a decision support system (the Investment Comparison System) to aid decision makers with Research and Development Investment allocations. The Investment Comparison System (ICS) can be used vertically within an organization and horizontally across organizations at multiple portfolio investment levels. The ICS is applicable to any R&D environment ranging from Industry Research Environments to Federal Agencies. The ICS described in this paper is comprised of a system architecture, databases, Group Decision Making (GDM) methods, an Investment Comparison Tool (ICT) that includes various algorithms, and …

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A Quiet Success Story In The Laboratory: Survey Of 30 Implementations Of The Astm 1394 Standard For Analyser Interfaces, Brian Markey, Damon Berry Nov 2010

A Quiet Success Story In The Laboratory: Survey Of 30 Implementations Of The Astm 1394 Standard For Analyser Interfaces, Brian Markey, Damon Berry

Conference Papers

In 1991 the American Society of Testing and Materials (ASTM) introduced the first version of a standard called ASTM E1394-91 for communication between centralised clinical analysers and host systems. For nearly 20 years this low key standard has been used as the basis for analyser host communications. A minor revision of the standard (ASTM1394-97) was published in 1998. This work gives a brief summary of the development of lab messages that led to the introduction and continued use of the standard. The authors also present a review and preliminary analysis of 30 implementations of ASTM E1394. The authors investigated 30 …

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A Numerical Methodology To Fully Elucidate The Altered Wall Shear Stress In A Stented Coronary Artery, Jonathan Murphy, Fergal Boyle Nov 2010

A Numerical Methodology To Fully Elucidate The Altered Wall Shear Stress In A Stented Coronary Artery, Jonathan Murphy, Fergal Boyle

Articles

Arterial restenosis after coronary stenting is caused by excessive tissue growth which is stimulated by arterial injury and alterations to the hemodynamic wall shear stress (WSS). Recent numerical studies have predicted only minor differences in the altered WSS between different stent designs using a commonly employed threshold assessment technique. While it is possible that there are only minor differences, it is more likely that this assessment technique is incapable of fully elucidating the alterations to the WSS created by stent implantation. This paper proposes a methodology that involves a more complete investigation into the stentinduced alterations of WSS by incorporating …

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Importance Of Phase Unwrapping For The Reconstruction Of Microwave Tomographic Images, Tomasz M. Grzegorczyk, Paul M. Meaney, Soon Ik Jeon, Shireen D. Geimer, Keith D. Paulsen Nov 2010

Importance Of Phase Unwrapping For The Reconstruction Of Microwave Tomographic Images, Tomasz M. Grzegorczyk, Paul M. Meaney, Soon Ik Jeon, Shireen D. Geimer, Keith D. Paulsen

Dartmouth Scholarship

Microwave image reconstruction is typically based on a regularized least-square minimization of either the complex-valued field difference between recorded and modeled data or the logarithmic transformation of these field differences. Prior work has shown anecdotally that the latter outperforms the former in limited surveys of simulated and experimental phantom results. In this paper, we provide a theoretical explanation of these empirical findings by developing closed form solutions for the fie

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Long Term Hydrologic Impact Assessment – Model Builder Approach, Cibin Raj Nov 2010

Long Term Hydrologic Impact Assessment – Model Builder Approach, Cibin Raj

GIS Day

Climate change has significant impact on hydrology and water quality. A simple Long Term Hydrologic Impact Assessment tool has been developed using model builder in ArcGIS 9.3 to simulate hydrology and water quality. The model developed to read precipitation data from netCDF format to simulate runoff. The tool box developed to simulate hydrology based on the widely used USDA Curve Number method and water quality using EMC (event mean concentration) of pollutant. The model in GIS allows easier management of input and output data and allows critical spatial and visual interpretation. The model developed for Wisconsin State, where the precipitation …

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Identification Of Psychological Patterns Using Neural Networks Approach, Panpan Hu Nov 2010

Identification Of Psychological Patterns Using Neural Networks Approach, Panpan Hu

Department of Electrical and Computer Engineering: Dissertations, Theses, and Student Research

Recent studies have shown that Artificial Neural Networks (ANNs) are suitable for recognizing patterns in the medical area. However, no study has been done to show whether or not they are also effective in the psychological area. In this study, ANNs are developed for six psychological cases related to sociobehavioral functioning. The cases are independent living skill deficits, disorder management deficits, occupational skill deficits, social skill deficits, dysregulation of anger/aggression, and substance abuse. Two models, one based on a backpropagation algorithm and the other based on a posteriori probability approach, were developed. The models were tested using data from 118 …

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Plant Growth Modeling Using L-System Approach And Its Visualization, Atris Suyantohadi, Alfiyan Alfiyan, Mochamad Hariadi, Mauridhi Hery Purnomo Nov 2010

Plant Growth Modeling Using L-System Approach And Its Visualization, Atris Suyantohadi, Alfiyan Alfiyan, Mochamad Hariadi, Mauridhi Hery Purnomo

Makara Journal of Technology

The visualization of plant growth modeling using computer simulation has rarely been conducted with Lindenmayer System (L-System) approach. L-System generally has been used as framework for improving and designing realistic modeling on plant growth. It is one kind of tools for representing plant growth based on grammar sintax and mathematic formulation. This research aimed to design modeling and visualizing plant growth structure generated using L-System. The environment on modeling design used three dimension graphic on standart OpenGL format. The visualization on system design has been developed by some of L-System grammar, and the output graphic on three dimension reflected on …

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Immobilization Of Saccharomyces Cerevisiae In Rice Hulls For Ethanol Production, Edita Martini, Dian Andriani, Sriramulu Gobikrishnan, Kyeong Eop Kang, Surn-Teh Bark, Changshin Sunwoo, Bambang Prasetya, Don-Hee Park Nov 2010

Immobilization Of Saccharomyces Cerevisiae In Rice Hulls For Ethanol Production, Edita Martini, Dian Andriani, Sriramulu Gobikrishnan, Kyeong Eop Kang, Surn-Teh Bark, Changshin Sunwoo, Bambang Prasetya, Don-Hee Park

Makara Journal of Technology

The whole cell immobilization in ethanol fermentation can be done by using natural carriers or through synthetic carriers. All of these methods have the same purpose of retaining high cell concentrations within a certain defined region of space which leads to higher ethanol productivity. Lignocellulosic plant substance represents one of highly potential sources in ethanol production. Some studies have found that cellulosic substances substances can also be used as a natural carrier in cell immobilization by re-circulating pre-culture medium into a reactor. In this experiment, rice hulls without any treatment were used to immobilize Saccharomyces cerevisiae through semi solid state …

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An Empirical Model For Build-Up Of Sodium And Calcium Ions In Small Scale Reverse Osmosis, Subriyer Nasir Nov 2010

An Empirical Model For Build-Up Of Sodium And Calcium Ions In Small Scale Reverse Osmosis, Subriyer Nasir

Makara Journal of Technology

A simple models for predicting build-up of solute on membrane surface were formulated in this paper. The experiments were conducted with secondary effluent, groundwater and simulated feed water in small-scale of RO with capacity of 2000 L/d. Feed water used in the experiments contained varying concentrations of sodium, calcium, combined sodium and calcium. In order to study the effect of sodium and calcium ions on membrane performance, experiments with ground water and secondary effluent wastewater were also performed. Build-up of salts on the membrane surface was calculated by measuring concentrations of sodium and calcium ions in feed water permeate and …

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The Effect Of Enzymatic Hydrolysis On The Properties Of Protein Hydrolysate From Paddy Mushroom, Niken Widya Palupi, Wiwik Siti Windrati, Tamtarini Tamtarini Nov 2010

The Effect Of Enzymatic Hydrolysis On The Properties Of Protein Hydrolysate From Paddy Mushroom, Niken Widya Palupi, Wiwik Siti Windrati, Tamtarini Tamtarini

Makara Journal of Technology

Protein hydrolysate was prepared from Paddy (Volvariella volvaceae) mushroom. Hydrolysis uses commercially protease available Protamex ™ with enzyme concentration of 0.1% (w/w). Hydrolysis was performed at three different temperatures (room temperature, 40 °C, and 50 °C) with different incubation periods (60, 90, and 120 minutes). Enzyme inactivation was done in 90 °C for 3 minutes. Yield and degree of hydrolysis ranged from 94.76% to 99.55% and 19.06% to 24.59%. Protein solubility was about 89–11,8%. The longer time of hydrolysis, the darker the color of protein hydrolysate. Protein hydrolysate which has hydrolysis at 50 °C for 120 minutes has the highest …

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Assessing Value Creation And Value Capture In Digital Business Ecosystems, Ravi S. Sharma, Francis Pereira, Narayan Ramasubbu, Margaret Tan, F. Ted Tschang Nov 2010

Assessing Value Creation And Value Capture In Digital Business Ecosystems, Ravi S. Sharma, Francis Pereira, Narayan Ramasubbu, Margaret Tan, F. Ted Tschang

Research Collection Lee Kong Chian School of Business

Interest in business modeling of technology enterprises – the activity of designing the architecture for revenues, costs, products and/or services delivery and the overall value of an enterprise – has risen to prominence with the global crossing of the Internet chasm. However, as several studies have pointed out (c.f., Osterwalder, Pigneur & Tucci, 2005; Teece 2010; Zott & Amit, 2010), the investigations of business models and their fit with the strategy of an enterprise, have received little scholarly attention. In this article we formulate a framework, called ADVISOR, for modeling the business strategies of enterprises in the Interactive Digital Media …

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Time Dependent Fixation And Implantation Forces For A Femoral Knee Component: An In Vitro Study, Travis A. Burgers, Jim Mason, Matthew Squire, Heidi-Lynn Ploeg Nov 2010

Time Dependent Fixation And Implantation Forces For A Femoral Knee Component: An In Vitro Study, Travis A. Burgers, Jim Mason, Matthew Squire, Heidi-Lynn Ploeg

Mechanical Engineering Faculty Publications

Implant survival rate is a primary concern for individuals receiving a primary total knee arthroplasty. Loosening is the primary reason for revision surgery and was therefore the focus of the current study. To better understand the mechanics of implant fixation, the time-dependent fixation of a femoral knee component was measured in vitro on three cadaveric femurs. The fixation of each femoral knee component was measured with strain gauged implants for at least 10 minutes on each femoral component. Additionally, impaction forces were measured during the implantation of each component. These forces were 2–6 times less than previously reported. The implantation …

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Nanomanufacturing And Analysis Of Novel Integrated Continuous Nanofibers, John E. Hannappel Nov 2010

Nanomanufacturing And Analysis Of Novel Integrated Continuous Nanofibers, John E. Hannappel

Department of Engineering Mechanics: Dissertations, Theses, and Student Research

Complex nanostructured materials have great potential for applications in many areas of nanotechnology. This potential is being unlocked by precise control of their nanoscale architecture and properties. Most current methods of creating these nanostructures are expensive and difficult to control, with the majority of techniques resulting in non-continuous nanostructures and nanoparticles. Electrospinning is an economic nanomanufacturing method resulting in continuous nanofibers. The method consists of spinning fiber-forming liquids in high electric fields. In this work, a modified electrospinning process was analyzed. The process utilized two concentric liquids that resulted in integrated continuous hollow or composite nanofibers. A new adjustable co-axial …

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Autonomous Underwater Vehicles As Tools For Deep-Submergence Archaeology, Christopher N. Roman, Ian Roderick Mather Nov 2010

Autonomous Underwater Vehicles As Tools For Deep-Submergence Archaeology, Christopher N. Roman, Ian Roderick Mather

Graduate School of Oceanography Faculty Publications

Marine archaeology beyond the capabilities of scuba divers is a technologically enabled field. The tool suite includes ship-based systems such as towed side-scan sonars and remotely operated vehicles, and more recently free-swimming autonomous underwater vehicles (AUVs). Each of these platforms has various imaging and mapping capabilities appropriate for specific scales and tasks. Broadly speaking, AUVs are becoming effective tools for locating, identifying, and surveying archaeological sites. This paper discusses the role of AUVs in this suite of tools, outlines some specific design criteria necessary to maximize their utility in the field, and presents directions for future developments. Results are presented …

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Structures Of Human Thymidylate Synthase R163k With Dump, Fdump And Glutathione Show Asymmetric Ligand Binding, Lydia M. Gibson, Lesa R. Celeste, Leslie L. Lovelace, Lukasz Lebioda Nov 2010

Structures Of Human Thymidylate Synthase R163k With Dump, Fdump And Glutathione Show Asymmetric Ligand Binding, Lydia M. Gibson, Lesa R. Celeste, Leslie L. Lovelace, Lukasz Lebioda

Faculty Publications

Thymidylate synthase (TS) is a well validated target in cancer chemotherapy. Here, a new crystal form of the R163K variant of human TS (hTS) with five subunits per asymmetric part of the unit cell, all with loop 181-197 in the active conformation, is reported. This form allows binding studies by soaking crystals in artificial mother liquors containing ligands that bind in the active site. Using this approach, crystal structures of hTS complexes with FdUMP and dUMP were obtained, indicating that this form should facilitate high-throughput analysis of hTS complexes with drug candidates. Crystal soaking experiments using oxidized glutathione revealed that …

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Characterization And Pollutant Loading Estimation For Highway Runoff In Omaha, Nebraska, Camilo Torres Nov 2010

Characterization And Pollutant Loading Estimation For Highway Runoff In Omaha, Nebraska, Camilo Torres

Department of Civil and Environmental Engineering: Dissertations, Theses, and Student Research

Stormwater from roadways could have negative effects on the environment. Typical highway runoff pollutants include heavy metals, petroleum hydrocarbons, gasoline constituents, PAHs (polyaromatic hydrocarbons), oxygen demanding compounds measured as COD (chemical oxygen demand) and BOD (biochemical oxygen demand), and road salts.

The objectives of this research were: characterize the pollutants in roadway runoff and determine the effectiveness of the existing stormwater BMPs at the study site. To accomplish these objectives, eleven rainfall events were sampled from November 2008 through November 2010.

First flush and composite highway runoff samples were analyzed for heavy metals, anions, nutrients, particulates, BOD, COD, VOCs, and …

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An Analytical Model Of A Thermally Excited Microcantilever Vibrating Laterally In A Viscous Fluid, Stephen M. Heinrich, Rabin Maharjan, Isabelle Dufour, Fabien Josse, Luke A. Beardslee, Oliver Brand Nov 2010

An Analytical Model Of A Thermally Excited Microcantilever Vibrating Laterally In A Viscous Fluid, Stephen M. Heinrich, Rabin Maharjan, Isabelle Dufour, Fabien Josse, Luke A. Beardslee, Oliver Brand

Civil and Environmental Engineering Faculty Research and Publications

To achieve higher quality factors (Q) for microcantilevers used in liquid-phase sensing applications, recent studies have explored the use of the lateral (in-plane) flexural mode. In particular, we have recently shown that this mode may be excited electrothermally using integrated heating resistors near the micro cantilever support, and that the resulting increase in Q helps to make low-ppb limits of detection a possibility in liquids. However, because the use of electrothermally excited, liquid-phase, microcantilever-based sensors in lateral flexure is relatively new, theoretical models are lacking. Therefore, we present here a new analytical model for predicting the vibratory response of these …

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