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

Engineering Commons™

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

California Polytechnic State University, San Luis Obispo

Discipline
Keyword
Publication Year
Publication
Publication Type
File Type

Articles 7201 - 7230 of 7975

Full-Text Articles in Engineering

Chromatic Dispersion Of Thin Film Filters, R. M. Fortenberry, M. A. Scobey, Dennis J. Derickson, L. F. Stokes, P. C. Egerton Mar 2005

Chromatic Dispersion Of Thin Film Filters, R. M. Fortenberry, M. A. Scobey, Dennis J. Derickson, L. F. Stokes, P. C. Egerton

Electrical Engineering

This paper discusses the chromatic dispersion effects of thin film filters used in telecommunications systems. ITU channel, banded architecture, and low dispersion filter results are presented. Design techniques to improve and manage chromatic dispersion in practical network implementations are discussed.

Go to article

System Identification Of Base-Isolated Building Using Seismic Response Data, T. Furukawa, M. Ito, K. Izawa, Mohammad N. Noori Mar 2005

System Identification Of Base-Isolated Building Using Seismic Response Data, T. Furukawa, M. Ito, K. Izawa, Mohammad N. Noori

Office of the Dean (CENG) Scholarship

Due to the complex nature of the excitation, and the inherent dynamics characteristics of restoring force of the base isolation systems, the response of base-isolated structures subject to strong earthquakes often experiences excursion into the inelastic range. Therefore, in designing base-isolated structures, the nonlinear hysteretic restoring force model of the base isolation system is frequently used to predict structural response and to evaluate structural safety. In this paper, the prediction error method system identification technique is used in conjunction with nonlinear state-space models for identification of a base-isolated structure. Using a variety of nonlinear restoring force models and bidirectional recorded …

Go to article

California Energy Commission: Estimated Energy Requirements Under Drought Conditions, Charles M. Burt, Daniel J. Howes Mar 2005

California Energy Commission: Estimated Energy Requirements Under Drought Conditions, Charles M. Burt, Daniel J. Howes

BioResource and Agricultural Engineering

This study is a continuation of a previous study conducted by ITRC for the CEC summarized in a report titled California Agricultural Water Energy Requirements (ITRC Report No. 03-006), which focused on determining a baseline energy requirement for agricultural sectors as well as analyzing potential future trends in the agricultural water community to predict future energy requirements. This study utilized the data and model developed in the previous analysis in order to quantify the impact of drought conditions on energy requirements of the agricultural water sector.

Go to article

Application Of Nonlinear Dynamics Tools For Diagnosis Of Cracked Rotor Vibration Signatures, Jerzy T. Sawicki, Xi Wu, Andrew L. Gyekenyesi, George Y. Baaklini Mar 2005

Application Of Nonlinear Dynamics Tools For Diagnosis Of Cracked Rotor Vibration Signatures, Jerzy T. Sawicki, Xi Wu, Andrew L. Gyekenyesi, George Y. Baaklini

Mechanical Engineering

The nonlinear model of the cracked Jeffcott rotor is investigated, with the particular focus on study of rotor’s vibrational response using tools of nonlinear dynamics. The considered model accounts for nonlinear behavior of the crack and coupling between lateral and torsional modes of vibrations. Load torque is applied to the rotor which is laterally loadedwith a constant radial force (gravity force) and unbalance excitation. The co-existence of frequencies of lateral modes in the frequency spectra of torsional mode are characteristics of the coupling response of lateral and torsional vibrations. When only the lateral excitations are applied, vibration amplitude bifurcation plot …

Go to article

Multiple-Model Optimization Of Proportional Integral Controllers On Canals, P. J. Van Overloop, J. Schuurmans, R. Brouwer, Charles M. Burt Mar 2005

Multiple-Model Optimization Of Proportional Integral Controllers On Canals, P. J. Van Overloop, J. Schuurmans, R. Brouwer, Charles M. Burt

BioResource and Agricultural Engineering

Canals or open channels that convey water often consist of pools in series separated by control structures. Successful implementation of water-level control with these structures using decentralized proportional integral (PI) controllers depends heavily on the tuning of the control parameters. These parameters are hard to determine due to the interactions between the pools and the varying flow conditions in the canal. This paper presents a procedure for tuning any linear controller (including decentralized PI controllers) that guarantees stability of the controlled canal. It minimizes a cost function that weights the water-level deviations from the target level against control efforts at …

Go to article

Retesting Of Liquefaction/Nonliquefaction Case Histories In The Imperial Valley, Robb E.S. Moss, Brian D. Collins, Daniel H. Whang Feb 2005

Retesting Of Liquefaction/Nonliquefaction Case Histories In The Imperial Valley, Robb E.S. Moss, Brian D. Collins, Daniel H. Whang

Civil and Environmental Engineering

This paper describes the retesting of liquefaction and nonliquefaction field case histories in the Imperial Valley using the electric cone penetration test (CPT). Subsurface testing of the River Park and Heber Road sites first occurred following the 1979 Imperial Valley earthquake (Bennett et al. 1981, Youd and Bennett 1983). These two sites are rich in information because they have experienced several earthquakes in recent history, have been subjected to moderate levels of strong ground shaking, the liquefiable layers have appreciable fines content, and the sites contain a number of high-quality non-liquefied data points. The recent liquefaction case history database for …

Go to article

Extension Of Modal Pushover Analysis To Compute Member Forces, Rakesh K. Goel, Anil K. Chopra Feb 2005

Extension Of Modal Pushover Analysis To Compute Member Forces, Rakesh K. Goel, Anil K. Chopra

Civil and Environmental Engineering

This paper extends the modal pushover analysis (MPA) procedure for estimating seismic deformation demands for buildings to compute member forces. Seismic demands are computed for six buildings, each analyzed for 20 ground motions. A comparison of seismic demands computed by the MPA and nonlinear response history analysis (RHA) demonstrates that the MPA procedure provides good estimates of the member forces. The bias (or error) in forces is generally less than that noted in earlier investigations of story drifts and is comparable to the error in the standard response spectrum analysis (RSA) for elastic buildings. The four FEMA-356 force distributions, on …

Go to article

Response To B. Maison's Discussion Of "Evaluation Of Modal And Fema Pushover Analyses: Sac Buildings", Rakesh K. Goel, Anil K. Chopra Feb 2005

Response To B. Maison's Discussion Of "Evaluation Of Modal And Fema Pushover Analyses: Sac Buildings", Rakesh K. Goel, Anil K. Chopra

Civil and Environmental Engineering

No abstract provided.

Go to article

Cec Agricultural Peak Load Reduction Program - Water Agencies Final Report, Charles M. Burt, Daniel J. Howes Feb 2005

Cec Agricultural Peak Load Reduction Program - Water Agencies Final Report, Charles M. Burt, Daniel J. Howes

BioResource and Agricultural Engineering

During the winter of 2000-2001, California experienced a severe imbalance in electricity supply and demand that resulted in blackouts and brownouts. The state legislature initiated a number of emergency programs, one of which was Senate Bill 5x. The primary goal of SB 5x is to reduce peak period electric demand throughout California. The California Energy Commission (CEC), acting under authority of Section 5(b) of the legislation, developed the “Agricultural Peak Load Demand Program”. The program was funded in early June 2001, and the Irrigation Training and Research Center (ITRC) of California Polytechnic State University (Cal Poly), San Luis Obispo was …

Go to article

Probabilistic Liquefaction Triggering Based On The Cone Penetration Test, Robb E.S. Moss, Raymond B. Seed, Robert E. Kayen, Jonathan P. Stewart, Kohji Tokimatsu Jan 2005

Probabilistic Liquefaction Triggering Based On The Cone Penetration Test, Robb E.S. Moss, Raymond B. Seed, Robert E. Kayen, Jonathan P. Stewart, Kohji Tokimatsu

Civil and Environmental Engineering

Performance-based earthquake engineering requires a probabilistic treatment of potential failure modes in order to accurately quantify the overall stability of the system. This paper is a summary of the application portions of the probabilistic liquefaction triggering correlations proposed recently proposed by Moss and co-workers. To enable probabilistic treatment of liquefaction triggering, the variables comprising the seismic load and the liquefaction resistance were treated as inherently uncertain. Supporting data from an extensive Cone Penetration Test (CPT)-based liquefaction case history database were used to develop a probabilistic correlation. The methods used to measure the uncertainty of the load and resistance variables, how …

Go to article

Thermal Analysis Of Gcls At A Municipal Solid Waste Landfill, James L. Hanson, Nazli Yesiller, G. E. Swarbrick Jan 2005

Thermal Analysis Of Gcls At A Municipal Solid Waste Landfill, James L. Hanson, Nazli Yesiller, G. E. Swarbrick

Civil and Environmental Engineering

This study was conducted to determine long-term thermal regime of landfill liner systems using a field temperature monitoring program and numerical analysis of heat transfer. Temperatures in liner systems that contain geosynthetic clay liners (GCLs) were monitored prior and subsequent to waste placement. Data were collected in three cells at a landfill in Midwestern USA for more than five years. The liner system in one of the cells was left exposed (not covered with waste) for a period exceeding one year subsequent to cell construction. The lowest and highest GCL temperatures were .1°C and 35°C, respectively and the localized temperature …

Go to article

Experimental Verification Of The Aerodynamics Of Stream Thrust Probes, Robert S. Hiers Iii, James R. Sirbaugh, Capt Barrett T. Mccann, Russell M. Cummings, Cadet Laura S. Luft, Cadet Dimitrios P. Grillos Jan 2005

Experimental Verification Of The Aerodynamics Of Stream Thrust Probes, Robert S. Hiers Iii, James R. Sirbaugh, Capt Barrett T. Mccann, Russell M. Cummings, Cadet Laura S. Luft, Cadet Dimitrios P. Grillos

Aerospace Engineering

Determining the local stream thrust (a vector quantity) from a measured pitot pressure (a scalar quantity) requires either knowledge of the flow direction or a probe shape that compensates for flow direction. This compensation ideally would make the measured pressure directly proportional to the component of momentum along the probe axis. The flow angle sensitivity required to resolve this component of momentum was previously determined theoretically. A proposed probe nose shape was analyzed using computational fluid dynamics (CFD) and was found to produce a flow angle sensitivity close to the required sensitivity. In the current work, the proposed nose shape …

Go to article

Computational Aerodynamics Goes To School: A Course In Cfd For Undergraduate Students, Russell M. Cummings, Scott A. Morton Jan 2005

Computational Aerodynamics Goes To School: A Course In Cfd For Undergraduate Students, Russell M. Cummings, Scott A. Morton

Aerospace Engineering

As aerodynamics education has evolved over the past decades, a slow transition from important analytic methods to increasingly powerful computational methods has taken place. While a basic understanding of theoretical aerodynamics should always be included in coursework, the realities of modern design practices make the usefulness of the traditional approach less and less practical. A new undergraduate course in computational aerodynamics has been developed that attempts to give students experience with the modern computational tools of aerodynamics, primarily from an applications perspective. While introducing students to the important computational topics of accuracy and stability, the course stresses the practical tools …

Go to article

Des Turbulence Modeling On The C-130 Comparison Between Computational And Experimental Results, Malcom P. Claus, Scott A. Morton, Russell M. Cummings, Yannick Bury Jan 2005

Des Turbulence Modeling On The C-130 Comparison Between Computational And Experimental Results, Malcom P. Claus, Scott A. Morton, Russell M. Cummings, Yannick Bury

Aerospace Engineering

This paper represents the results from the initial phase of a research program to determine the flow characteristics of the C-130 Hercules transport aircraft. The initial phase of the program consists of evaluation and comparison of the flow-field obtained from flow visualization methods. Specifically CFD (Computational Fluid Dynamics) results are compared with experimental Hot Wire results produced by wind tunnel tests on the C-130 in clean configuration. This paper outlines the results to date and provides a description of further work. The CFD element of this research features the use of Detached Eddy Simulation (DES) in order to extend its …

Go to article

Deformation Of Unstructured Viscous Grids, Denis B. Kholodar, Scott A. Morton, Russell M. Cummings Jan 2005

Deformation Of Unstructured Viscous Grids, Denis B. Kholodar, Scott A. Morton, Russell M. Cummings

Aerospace Engineering

A mesh deformation algorithm for unstructured grids is presented. It is designed for high Reynolds number flow problems. Such grids are employed in aerodynamic and aeroelastic studies of wings or complete aircraft configurations in flows where the viscous effects are important. Given a surface deformation, the method efficiently recalculates new locations of high aspect ratio cells that make up the viscous layers of the grid and then deforms the inviscid part of the grid using an established method based on a torsional spring analogy technique. Results are presented for monitoring the deterioration of the quality of the grid during subsequent …

Go to article

California Energy Commission Agricultural Peak Load Reduction Program Case Study: Berrenda Mesa Wsd, Charles M. Burt, Daniel J. Howes Jan 2005

California Energy Commission Agricultural Peak Load Reduction Program Case Study: Berrenda Mesa Wsd, Charles M. Burt, Daniel J. Howes

BioResource and Agricultural Engineering

Berrenda Mesa Water Storage District (BMWSD) is located in the southern part of the San Joaquin Valley near Bakersfield. The district receives water from the State Water Project – California Aqueduct.

Go to article

California Energy Commission Agricultural Peak Load Reduction Program Case Study: Kaweah River Power Authority And Tulare Id, Charles M. Burt Jan 2005

California Energy Commission Agricultural Peak Load Reduction Program Case Study: Kaweah River Power Authority And Tulare Id, Charles M. Burt

BioResource and Agricultural Engineering

Tulare Irrigation District (TID) is located on the east side of the Central San Joaquin Valley just south of Visalia, CA. The district receives water from Lake Kaweah through Terminus Dam as well as from the Friant-Kern Canal. TID is the single largest partner in the Kaweah River Power Authority (KRPA), which operates Terminus Dam and regulates the discharge from Lake Kaweah.

Go to article

Machine Vision Course For Manufacturing Engineering Undergraduate Students, Jose Macedo, Kurt Colvin, Daniel Waldorf Jan 2005

Machine Vision Course For Manufacturing Engineering Undergraduate Students, Jose Macedo, Kurt Colvin, Daniel Waldorf

Industrial and Manufacturing Engineering

A 10-week course was designed with funding from the Society of Manufacturing Engineers (SME) and input from industry representatives, to offer upper division engineering students a course on advanced automation. The objective was to provide engineering students theoretical and hands-on practical experience with automation technologies that will be of prime importance over the next decade: data acquisition and instrumentation, machine vision and motion control. This paper describes the machine vision portion of that class. It describes important concepts, hands-on equipment, and labs developed for this course, as well as examples of student projects from Spring Quarter, 2004. The course and …

Go to article

Thermal Analysis Of Gcls At A Municipal Solid Waste Landfill, J. L. Hanson, Nazli Yesiller, G. E. Swarbrick Jan 2005

Thermal Analysis Of Gcls At A Municipal Solid Waste Landfill, J. L. Hanson, Nazli Yesiller, G. E. Swarbrick

Civil and Environmental Engineering

This study was conducted to determine long-term thermal regime of landfill liner systems using a field temperature monitoring program and numerical analysis of heat transfer. Temperatures in liner systems that contain geosynthetic clay liners (GCLs) were monitored prior and subsequent to waste placement. Data were collected in three cells at a landfill in Midwestern USA for more than five years. The liner system in one of the cells was left exposed (not covered with waste) for a period exceeding one year subsequent to cell construction. The lowest and highest GCL temperatures were –1°C and 35°C, respectively and the localized temperature …

Go to article

Anaheim Advanced Traffic Control System Field Operational Test: Technical Evaluation Of Scoot, James E. Moore Ii, C. Arthur Maccarley, Stephen Mattingly, Michael G. Mcnally Jan 2005

Anaheim Advanced Traffic Control System Field Operational Test: Technical Evaluation Of Scoot, James E. Moore Ii, C. Arthur Maccarley, Stephen Mattingly, Michael G. Mcnally

Electrical Engineering

This article provides a technical evaluation of the traffic control element of the Anaheim Advanced Traffic Control System Field Operations Test (FOT), sponsored by the US Department of Transportation. The primary objective for this test was the evaluation of adaptive traffic signal control technologies, including the Split Cycle and Offset Optimization Technique (SCOOT) for intersection signal control. The SCOOT evaluation was defined relative to existing, first generation Urban Traffic Control System (UTCS)-based control using standard US field detectorization. This US geometry is not the detector configuration normally used with SCOOT. SCOOT was implemented with some degree of success, though technical …

Go to article

Lead-Free Solder Joint Reliability – State Of The Art And Perspectives, Jianbiao Pan, Jyhwen Wang, David M. Shaddock Jan 2005

Lead-Free Solder Joint Reliability – State Of The Art And Perspectives, Jianbiao Pan, Jyhwen Wang, David M. Shaddock

Industrial and Manufacturing Engineering

There is an increasing demand for replacing tin-lead (Sn/Pb) solders with lead-free solders in the electronics industry due to health and environmental concerns. The European Union recently passed a law to ban the use of lead in electronic products. The ban will go into effect in July of 2006. The Japanese electronics industry has worked to eliminate lead from consumer electronic products for several years. Although currently there are no specific regulations banning lead in electronics devices in the United States, many companies and consortiums are working on lead-free solder initiatives including Intel, Motorola, Agilent Technologies, General Electric, Boeing, NEMI …

Go to article

Undergraduate Course In Environmental Design And Manufacturing, Andrew S. Borchers, Trevor S. Harding, Terri Lynch-Carls, Benjamin Redekop, Craig Hoff, Jackie El-Sayed, Daryl Doyle Jan 2005

Undergraduate Course In Environmental Design And Manufacturing, Andrew S. Borchers, Trevor S. Harding, Terri Lynch-Carls, Benjamin Redekop, Craig Hoff, Jackie El-Sayed, Daryl Doyle

Materials Engineering

This paper is a progress report on the development of an undergraduate course in environmental design and manufacturing. The importance of the topic is clear from National Academy of Engineering statements regarding the need to incorporate content on sustainable technology. The multidisciplinary team includes academic faculty from engineering, science, liberal studies, and business in collaboration with industry partners. The team's approach is to create a case-based course by adapting existing educational modules from Ford Motor Company. The group has received National Science Foundation funding for this project (DUE-0511322), and the project is currently in its beginning phases.

Go to article

Comparison Of Measured And Fao-56 Modeled Evaporation From Bare Soil, Andrew J. Mutziger, Charles M. Burt, Daniel J. Howes, Richard G. Allen Jan 2005

Comparison Of Measured And Fao-56 Modeled Evaporation From Bare Soil, Andrew J. Mutziger, Charles M. Burt, Daniel J. Howes, Richard G. Allen

BioResource and Agricultural Engineering

This paper evaluates how well the FAO-56 style soil water evaporation model simulates measurements of evaporation (E) from bare soil. Seven data sets were identified from the literature and in all but one case, the individuals who took the measurements were contacted and they provided the writers with specific weather and soils data for model input. Missing weather and soils data were obtained from online sources or from the National Climatic Data Center. Simulations for three possible variations of soil data were completed and compared. The measured and the FAO-56 simulated E/ETo and cumulative evaporation trends and …

Go to article

Evaporation Research: Review And Interpretation, Charles M. Burt, Andrew J. Mutziger, Robert G. Allen, Terry A. Howell Jan 2005

Evaporation Research: Review And Interpretation, Charles M. Burt, Andrew J. Mutziger, Robert G. Allen, Terry A. Howell

BioResource and Agricultural Engineering

Literature regarding evaporation from soil, wet plant surfaces, and sprinkler droplets was examined, normalized, and interpreted. Much of the evaporation literature is difficult to compare and interpret; this paper offers comparisons and discussions of various findings by others as well as by the writers. Techniques of measuring and estimating evaporation from irrigation and rainfall are discussed. The partitioning between increased evaporation and decreased transpiration from a variety of research is quantified. Factors that impact the various forms of evaporation are listed and quantified. This review and summary will provide practitioners and researchers with theoretical and practical guidance on measurement techniques …

Go to article

Governors Highway Safety Associations And Transportation Planning: Exploratory Factor Analysis And Structural Equation Modeling, Sudeshna Mitra, Simon Washington, Eric Dumbaugh, Micael D. Meyer Jan 2005

Governors Highway Safety Associations And Transportation Planning: Exploratory Factor Analysis And Structural Equation Modeling, Sudeshna Mitra, Simon Washington, Eric Dumbaugh, Micael D. Meyer

Civil and Environmental Engineering

The Intermodal Surface Transportation Efficiency Act (ISTEA) of 1991 mandated the consideration of safety in the regional transportation planning process. As part of National Cooperative Highway Research Program Project 8-44, "Incorporating Safety into the Transportation Planning Process," we conducted a telephone survey to assess safety-related activities and expertise at Governors Highway Safety Associations (GHSAs), and GHSA relationships with metropolitan planning organizations (MPOs) and state departments of transportation (DOTs). The survey results were combined with statewide crash data to enable exploratory modeling of the relationship between GHSA policies and programs and statewide safety. The modeling objective was to illuminate current hurdles …

Go to article

Cheating In College And The Workplace: An Examination Of Engineering Undergraduates' Ethical Behavior, Trevor S. Harding, Donald D. Carpenter, Cynthia J. Finelli Jan 2005

Cheating In College And The Workplace: An Examination Of Engineering Undergraduates' Ethical Behavior, Trevor S. Harding, Donald D. Carpenter, Cynthia J. Finelli

Materials Engineering

Research has demonstrated that engineering undergraduates report higher rates of cheating than those in other disciplines and that students who cheat in college are more likely to make unethical decisions as professionals. Therefore, better understanding the decision-making processes of engineering students and professionals who engage in dishonest behavior could lead to effective college-level interventions to cheating that have a positive impact on the ethical behavior of future professionals. To explore the relationship between academic and professional ethical behavior, the authors launched the Work Experience Study (WES) that examines students’ decision-making in situations where they are tempted to engage in unethical …

Go to article

Prediction Accuracy For Projectwide Evapotranspiration Using Crop Coefficients And Reference Evapotranspiration, Richard G. Allen, Albert J. Clemmens, Charles M. Burt, Ken Solomon, Tim O'Halloran Jan 2005

Prediction Accuracy For Projectwide Evapotranspiration Using Crop Coefficients And Reference Evapotranspiration, Richard G. Allen, Albert J. Clemmens, Charles M. Burt, Ken Solomon, Tim O'Halloran

BioResource and Agricultural Engineering

The Imperial Irrigation District is a large irrigation project in the western United States having a unique hydrogeologic structure such that only small amounts of deep percolation leave the project directly as subsurface flows. This structure is conducive to relatively accurate application of a surface water balance to the district, enabling the determination of crop evapotranspiration (ETc) as a residual of inflows and outflows. The ability to calculate ETc from discharge measurements provides the opportunity to assess the accuracy and consistency of an independently applied crop coefficient—reference evapotranspiration (Kc ET0) procedure integrated over …

Go to article

The Limits Of Reflexive Design In A Secrecy-Based Organization, Michael W. Stebbins, Tali Freed, A.B. (Rami) Shani, Kenneth H. Doerr Jan 2005

The Limits Of Reflexive Design In A Secrecy-Based Organization, Michael W. Stebbins, Tali Freed, A.B. (Rami) Shani, Kenneth H. Doerr

Industrial and Manufacturing Engineering

No abstract provided.

Go to article

Spatiotemporal Variation Of Risk Preceding Crashes On Freeways, Anurag Pande, Mohamed Abdel-Aty, Liang Hsia Jan 2005

Spatiotemporal Variation Of Risk Preceding Crashes On Freeways, Anurag Pande, Mohamed Abdel-Aty, Liang Hsia

Civil and Environmental Engineering

Research into the application of freeway loop detector data for traffic safety has gained momentum in recent years. The incompleteness of data from loop detectors has been a common problem in both the development and the implementation of models. The effect of individual crash precursors, obtained one at a time from a series of loop detectors, on relative risk of crash occurrence was examined through within-stratum one-covariate logistic regression models. The hazard ratio (resultant change in log odds of observing a crash by changing the covariate by one unit) was used as the measure of risk. The log of coefficient …

Go to article

Split Models For Predicting Multivehicle Crashes During High-Speed And Low-Speed Operating Conditions On Freeways, Mohamed Abdel-Aty, Nizam Uddin, Anurag Pande Jan 2005

Split Models For Predicting Multivehicle Crashes During High-Speed And Low-Speed Operating Conditions On Freeways, Mohamed Abdel-Aty, Nizam Uddin, Anurag Pande

Civil and Environmental Engineering

The future of traffic management and highway safety lies in proactive traffic management systems. Crash prediction models that use real-time traffic flow variables measured through a series of loop detectors are the most important component of such systems. A previous crash prediction model was developed with the matched case-control logistic regression technique. Although the model achieved reasonable classification accuracy, it remained open to improvement because of the limited study area, sample size, and transferability issues. Therefore, the previous work had been extended. Multivehicle freeway crashes under high- and low-speed traffic conditions were found to differ in severity and in their …

Go to article

First Prev Next Last