Rachel Mack, the newest member of the directives team came on board May 4, 2015. Rachel, a United States Army veteran, recently graduated from Georgetown University with a Masters Degree in Public Policy. She will be assisting Camille Beben and Christopher Tirado in administering the directives program.
Southwest Research Institute
The goal of this project was to install a production-ready, state-of-the-art engine control system on the Mack E7G natural gas engine to improve efficiency and lower exhaust emissions. In addition, the power rating was increased from 300 brake horsepower (bhp) to 325 bhp. The emissions targets were oxides of nitrogen plus nonmethane hydrocarbons of less than 2.5 g/bhp-hr and particulate matter of less than 0.05 g/bhp-hr on 99% methane. Vehicle durability and field testing were also conducted. Further development of this engine should include efficiency improvements and oxides of nitrogen reductions.
Centr al (4) W. South Centr al (7) E. South Centr al (6) E. North Centr al (3) S. Atlan tic (5) FL (10) Mid. Atlan tic (2) New Engl. (1) W. Canad a E. Canad a MacK enzie Alask a...
Graduate student experiences computing in the fast lane Yashema Mack Florida A&M student ... Click image to enlarge. Florida A&M University graduate student Yashema Mack experienced a ...
Engineering Decker Mack GmbH Jump to: navigation, search Name: Solar Engineering Decker & Mack GmbH Place: Hannover, Germany Zip: 30165 Sector: Services, Solar Product: Firm...
Results of an investigation into effects of biofuels on engine- and system-out emissions, specifically US 2010 EPA exhaust after-treatment system from Mack Trucks
Retrievals and Comparisons of Various MODIS-Spectrum Inferred Water Cloud Droplet Effective Radii Fu-Lung Chang @ , Patrick Minnis , Bing Lin , Sunny Sun-Mack & , Mandana ...
; Colley, Michelle ; Patel, Pralit L. ; Eom, Jiyong ; Kim, Son H. ; Kyle, G. Page ; Schultz, Peter ; Venkatesh, Boddu ; Haydel, Juanita ; Mack, Charlotte ; Creason, Jared ...
H. Ibser, Jennifer Lewicki, B. Mack. Kennedy, Michael Swyer (2013) Egs Exploration Methodology Project Using the Dixie Valley Geothermal System, Nevada, Status Update Ileana M....
H. Ibser, Jennifer Lewicki, B. Mack. Kennedy, Michael Swyer (2013) Egs Exploration Methodology Project Using the Dixie Valley Geothermal System, Nevada, Status Update Christoph...
H. Ibser, Jennifer Lewicki, B. Mack. Kennedy, Michael Swyer (2013) Egs Exploration Methodology Project Using the Dixie Valley Geothermal System, Nevada, Status Update Phil...
H. Ibser, Jennifer Lewicki, B. Mack. Kennedy, Michael Swyer (2013) Egs Exploration Methodology Project Using the Dixie Valley Geothermal System, Nevada, Status Update Additional...
H. Ibser, Jennifer Lewicki, B. Mack. Kennedy, Michael Swyer (2013) Egs Exploration Methodology Project Using the Dixie Valley Geothermal System, Nevada, Status Update Additional...
Methods Ohio EPA provides detailed guidance with respect to monitoring methods and data analysis for evaluation of performance standards (Mack et al. 2004). As Table 3 shows, the...
Channeling through Bent Crystals Mack, Stephanie; Ottawa U. SLAC 43 PARTICLE ACCELERATORS; ACCELERATORS; BEAM DUMPS; BENDING; CHANNELING; CRYSTAL LATTICES; DETECTION; FORTRAN;...
Channeling through Bent Crystals Mack Stephanie Ottawa U SLAC PARTICLE ACCELERATORS ACCELERATORS BEAM DUMPS BENDING CHANNELING CRYSTAL LATTICES DETECTION FORTRAN METERS MULTIPLE...
and Space Agency - Langley Research Center Hampton, Virginia S. Sun-Mack Science Applications International ... The National Weather Service automated weather station in ...
Channeling through Bent Crystals Stephanie Mack Office of Science, Science Undergraduate Laboratory Internship (SULI) University of Ottawa SLAC National Accelerator Laboratory...
This is a request by MACK TRUCK for a DOE waiver of domestic and foreign patent rights under agreement DE-FC26-05NT42417.
This is a request by MACK TRUCK for a DOE waiver of domestic and foreign patent rights under agreement DE-FC26-05NT42421.
Wood Pole Replacements Along the Drummond-Macks Inn, Macks Inn-Madison, and Targhee Tap 115-Kilovolt Transmission Line Right-of-ways CX(s) Applied: B1.3 Date: 02/10/2012 Location(s): Idaho Offices(s): Bonneville Power Administration
Wood Pole Replacements Along the Drummond-Macks Inn, Macks Inn-Madison, and Swan Valley-Teton 115-kilovolt Transmission Line Rights-of-Way CX(s) Applied: B1.3 Date: 11/29/2012 Location(s): Idaho, Idaho Offices(s): Bonneville Power Administration
... Mack, Douglas G. (1) Murphy, Guinevere A. (1) Novikov, Andrey (1) Rubtsova, Kira (1) Scott-Browne, James (1) White, Janice (1) Save Results Save this search to My Library Excel ...
Surface Solar Radiation Budget: Corrections for Ice Clouds Y. Zhang and Z. Li EMS, Canada Centre for Remote Sensing Ottawa, K1A 0Y7, Canada A. Macke Institut fuer Meereskunde 24105 ...
(202) 287-5641 Christopher Tirado, (202) 586-4967 Rachel Mack, (202) 287-6804 Delegation Program Management Gail Cephas,(202) 586-1049 Web Site Administration Technical Support...
remained closed to the diffusion of He and H2 since their formation. Authors Joseph N. Moore, David I. Norman and B. Mack Kennedy Published Journal Chemical Geology, 2001 DOI...
Cindy and Mack Smith Site - Utah Wind Anemometer Loan Program Latitude: N. 37 deg. 44.034' Longitude: W. 109 deg. 17.28' Elevation: 6762' Placed in service: November 21, 2002...
Channeling through Bent Crystals","Mack, Stephanie; Ottawa U. SLAC","2012-09-07T04:00:00Z",1050214,"10.21721050214","SLAC-TN-12-026","AC02-76SF00515","TRN: US1204684","Technical...
to library Conference Paper: Geology of Southwestern New Mexico Authors R.E. Clemons and G.H. Mack Conference 39th Field Conference; ConferencePlace"ConferencePlace"...
Beneath Mammoth Mountain, California Citation Michael L. Sorey,B. Mack Kennedy,William C. Evans,Christopher D. Farrar. 1990. Increases in 3He4He in Fumarolic Gas Associated with...
Wilson, K. G.
Mack and Kastrup have proposed that broken scale invariance is a symmetry of strong interactions. There is evidence from the Thirring model and perturbation theory that the dimensions of fields defined by scale transformations will be changed by the interaction from their canonical values. We review these ideas and their consequences for strong interactions.
On April 7, 2015, the U.S. Department of Energy (DOE) recognized four Pennsylvania manufacturing plants owned by Curtiss-Wright, General Dynamics, Land O’Lakes, and Mack Trucks for their leadership in energy management by earning certification to Superior Energy Performance®.
Document Profiles Natural Gas Fueling, Fleet Operation Media may contact: George Douglas, 303-275-4096 email: George Douglas Steve Ginter, Mack, 610-709-3259 Golden, Colo., June 7, 2000 - A unique and successful natural gas fueling and fleet operation involving trash haulers is discussed in a recent document issued by the U.S. Department of Energy's National Renewable Energy Laboratory (NREL). The NREL document, Waste Management's LNG Truck Fleet Start-Up Experience, offers solid evidence that
Mack, Stephanie" Name Name ORCID Product Type: All Book/Monograph Conference/Event Journal Article Miscellaneous Patent Program Document Software Manual Technical Report Thesis/Dissertation Subject: Identifier Numbers: Site: All Alaska Power Administration, Juneau, Alaska (United States) Albany Research Center (ARC), Albany, OR (United States) Albuquerque Complex - NNSA Albuquerque Operations Office, Albuquerque, NM (United States) Amarillo National Resource Center for Plutonium, Amarillo,
Microphysical and Radiative Properties Derived from MODIS, VIRS, AVHRR, and GMS Data Over the Tropical Western Pacific G. D. Nowicki, M. L. Nordeen, P. W. Heck, D. R. Doelling, and M. M. Khaiyer Analytical Services and Materials, Inc. Hampton, Virginia P. Minnis National Aeronautics and Space Administration Atmospheric Sciences Division Langley Research Center Hampton, Virginia S. Sun-Mack Science Applications International Corporation Hampton, Virginia Introduction Utilization of the
Contact form Directives are the Department of Energy's primary means of establishing policies, requirements, responsibilities, and procedures for Departmental elements and contractors. Directives and Delegations Program Management Emily Stanton, (202) 287-5641 Directives Program Point of Contact Rachel Mack, (202) 287-6804 Delegations Program Point of Contact Gail Cephas,(202) 586-1049 Web Site Administration Technical Support Staff, (505) 663-1302 Fill in this form to contact us. Name Please
A Radiation Closure Study at Both Surface and TOA Using RTM PI Contact: Dong, X., University of Arizona Area of Research: Radiation Processes Working Group(s): Radiative Processes Journal Reference: Dong X, B Xi, S Qiu, P Minnis, S Sun-Mack, and F Rose. 2016. "A radiation closure study of Arctic stratus cloud microphysical properties using the collocated satellite-surface data and Fu-Liou radiative transfer model." Journal of Geophysical Research - Atmospheres, 121(17),
9 Testing a Cirrus Radiation Scheme with In Situ Microphysical and Radiometric Measurements from a Tropical Cirrus Anvil D. L. Mitchell and D. Ivanova Atmospheric Sciences Center Desert Research Institute Reno, Nevada G. M. McFarquhar National Center for Atmospheric Research Boulder, Colorado A. Macke Universitaet zu Kiel Kiel, Germany Experimental Design and Objective The only successful microphysics/radiation experiment to date in tropical anvil cirrus was the 4 April 1993 mission during the
Photovoltaic Efficiency Measurements Keith Emery National Renewable Energy Lab 1617 Cole Blvd. Golden,CO 80401 Email:email@example.com Cells: Coordinator: Tom Moriarty Charles Mack Modules: Coordinator: Steve Rummel Allen Anderberg Laurence Ottoson Concentrator Cells : James Kiehl NCPV M&C Mgmt/Main. Contracts P. Sheldon Analytical Microscopy Task M. Al-Jassim Cell & Module Performance Task K. Emery Surface Analysis Task S. Asher Electro-Optical Charact. Task R. Ahrenkiel Process
Flow cytometry aids basic cell biology research and drug discovery April 3, 2012 Examining cells has never been clearer with LANL's use of acoustic waves Flow cytometry dates back to a cell sorter built by Mack Fulwyler at Los Alamos in 1965. Several additional contributions to the technology have been made at the National Flow Cytometry Resource of Los Alamos National Laboratory (LANL). Flow cytometry allows scientists to quantify and examine cells by passing them through a laser-based
Expands Energy Cooperation with Sweden U.S. Expands Energy Cooperation with Sweden June 28, 2007 - 2:08pm Addthis DOE to Work with Volvo AB/Mack Trucks on Advanced Vehicle R&D STOCKHOLM, SWEDEN - U.S. Department of Energy's (DOE) Assistant Secretary for Energy Efficiency and Renewable Energy Alexander Karsner and Swedish Deputy Prime Minister and Minister of Enterprise and Energy Maud Olofsson today signed an implementing agreement to further expand cooperation on renewable energy and
NATURAL RESOURCES AGENCY EDMUND G. BROWN JR., Governor Ex Parte Meeting Report Date: June 19, 2012 Time: 2:00 pm EST Location: U.S. Department of Energy, 1000 Independence Ave SW, Washington, DC, 20585 (Room 7A-219) Organizers: Grant Mack, Executive Fellow to Chair Robert B. Weisenmiller, and Brian Turner, Deputy Director at Washington, DC Office of Governor Edmund G. Brown Jr. Purpose: Provide information about California's standards for battery charger systems. Attendees Name Affiliation
Science Magazine Highlight: Moving Towards Near Zero Platinum Fuel Cells Piotr Zelenay Co-Authors Gang Wu, Hoon Chung, Christina Johnston, Patrick Turner, Zhongfen Ding, Jerzy Chlistunoff, Nate Mack, Mark Nelson Los Alamos National Laboratory Los Alamos, New Mexico 87545, USA 1 1 Fuel Cell Technologies Program Webinar - April 25, 2011 DOE Fuel Cell Technologies Webinar - April 25, 2011 Outline * Introduction: ─ rationale ─ recent developments in non-precious metal oxygen reduction reaction
Variability in Marine Stratocumulus Clouds Observations of Natural Variability in Marine Stratocumulus Clouds Albrecht, Bruce University of Miami Kollias, Pavlos RSMAS/University of Miami Jo, Ieng Rosentiel School of Marine & Atmospheric Science Ghate, Virendra RSMAS/Univ. Miami Serpetzoglou, Efthymious Minnis, Patrick NASA Langley Research Center Sun-Mack, Szedung SAIC Large to mesoscale features affecting the albedo of marine stratocumulus clouds are observed frequently and can have a
Wyman, Charles; Balan, Venkatech; Dale, Bruce E.; Elander, Richard; Falls, Matthew; Hames, Bonnie; Holtzapple, Mark; Ladisch, Michael R.; Lee, Y. Y.; Mosier, Nathan; Pallapolu, Venkata R.; Shi, Jian; Warner, Ryan E.
Dilute sulfuric acid (DA), sulfur dioxide (SO2), liquid hot water (LHW), soaking in aqueous ammonia (SAA), ammonia fiber expansion (AFEX), and lime pretreatments were applied to Alamo, Dacotah, and Shawnee switchgrass. Application of the same analytical methods and material balance approaches facil-itated meaningful comparisons of glucose and xylose yields from combined pretreatment and enzymatic hydrolysis. Use of a common supply of cellulase, beta-glucosidase, and xylanase also eased comparisons. All pretreatments enhanced sugar recovery from pretreatment and subsequent enzymatic hydrolysis substantially compared to untreated switchgrass. Adding beta-glucosidase was effective early in enzy-matic hydrolysis while cellobiose levels were high but had limited effect on longer term yields at the enzyme loadings applied. Adding xylanase improved yields most for higher pH pretreatments where more xylan was left in the solids. Harvest time had more impact on performance than switchgrass variety, and microscopy showed changes in different features could impact performance by different pretreatments.
Workshop NASA Langley Research Center / Climate Sciences ARM November 13-15, 2006 Overview of NASA-LaRC TWP-ICE Satellite Products P. Minnis, L. Nguyen, and W. L. Smith National Aeronautics and Space Administration Langley Research Center Climate Science Branch R. Palikonda, M.M. Khaiyer, J. K. Ayers, D. R. Doelling, M. L. Nordeen, D. A. Spangenberg, P. K. Chan, and Y. Yi Analytical Services and Materials, Inc. Y. Chan, Q. Z. Trepte, & S. Sun-Mack Science Application International
Validation of CERES-MODIS Cloud Retrievals Using the Azores Data Download a printable PDF Submitter: Dong, X., University of Arizona Area of Research: Cloud Processes Working Group(s): Cloud Life Cycle Journal Reference: Xi B, P Minnis, and S Sun-Mack. 2014. "Comparison of marine boundary layer cloud properties from CERES-MODIS edition 4 and DOE ARM AMF measurements at the Azores." Journal of Geophysical Research - Atmospheres, 119, doi:10.1002/2014JD021813. Figure 1. The ARM radar-MWR
ARM Measurements Validate New Satellite Multilayer Cloud Remote Sensing Method Submitter: Minnis, P., NASA - Langley Research Center Area of Research: Cloud Distributions/Characterizations Working Group(s): Cloud Properties Journal Reference: Huang, J., P. Minnis, B. Lin, Y. Yi, T.-F. Fan, S. Sun-Mack, and J. K. Ayers, 2006: Determination of ice water path in ice-over-water cloud systems using combined MODIS and AMSR-E measurements. Geophys. Res. Lett., 33, L21801, 10.1029/2006GL027038. Minnis,
Validation of CERES-MODIS Cloud Properties Using ARM Data Submitter: Dong, X., University of Arizona Area of Research: Cloud Distributions/Characterizations Working Group(s): Cloud Properties Journal Reference: Dong, X., P. Minnis, B. Xi, S. Sun-Mack, and Y. Chen, 2007: Validation of CERES-MODIS stratus cloud properties using ground-based measurements at the DOE ARM SGP site. Accepted by J. Geophys. Res. Wielicki, B. A. and Co-authors (2000), CERES Validation Plan Overview, Release 4, 10/20/00,
Central Cascades Arc-Backarc Regime, Oregon Philip E. Wannamaker, P.I. University of Utah/EGI 423 Wakara Way, Ste 300 Salt Lake City, UT 84108 U.S.A. Ph. 801-581-3547 firstname.lastname@example.org Track: Exploration Validation/PFA Project Officer: Mark Zeigenbein; Total Project Funding: $537,482 May 12, 2015 This presentation does not contain any proprietary confidential, or otherwise restricted information. NB 3S JF/BB KL CL KN _____________ 50 km DP McL Co-I's: Andrew Meigs (OSU); B.Mack Kennedy, Eric
Validation of CERES/MODIS Cloud Property Retrievals Using Ground-Based Measurements Obtained at the DOE ARM SGP Site Dong, X.(a), Minnis, P.(b), Sun-Mack, S.(b), and Mace, G.G.(a), University of Utah (a), NASA Langley Research Center (b) Twelfth Atmospheric Radiation Measurement (ARM) Science Team Meeting Cloud macrophysical and microphysical properties derived from the NASA TERRA (EOS-AM) Moderate Resolution Spectroradiometer (MODIS) as part of the Clouds and the Earth's Radiant Energy System
Validation of TERRA MODIS Cloud Properties Using Ground-Based Measurements at the DOE ARM SGP Site Dong, X.(a), Xi, B.(a), Minnis, P.(b), Wielicki, B.(b), Sun-Mack, S.(c), Chen,Y.(c), and Mace, G.G.(d), University of North Dakota (a), NASA/Langley Research Center (b), SAIC, Inc. (c), University of Utah (d) Cloud macrophysical and microphysical/optical properties derived from the Moderate Resolution Imaging Spectroradiometer (MODIS) on Terra as part of the Clouds and the Earth's Radiant Energy
R. Yost 1 , P. Minnis 2 , J. K. Ayers 1 , R. Palikonda 1 , D. Spangenberg 1 , S. Sun-Mack 1 , Y. Chen 1 1 Science Systems & Applications, Inc. Hampton, VA 2 NASA Langley Research Center Hampton, VA Introduction Accurate cloud top heights are necessary to compute TOA fluxes in climate models, but passive IR-based satellite retrievals and ground measurements tend to underestimate the top altitude of ice-phase clouds (e.g., anvils). * IR retrievals underestimate cloud top heights by 1-2 km
Seventeen years ago John E. Carroll and Newell B. Mack analyzed the then-current status of environmental protection mechanisms used between Canada and the United States. They criticized the ad hoc nature of North America`s history of environmental dispute resolution, which they dubbed ``ad hockery,`` and believed the present ambiguity hurt business, diplomatic relations, and the citizenry`s environment. Since that publication, increasing efforts to incorporate environmental concerns into Conventions have resulted in several multilateral agreements focusing on environmental protection and dispute resolution. Part 2 of this paper introduces a few of these recent agreements and the mechanisms they have established to monitor environmental damage and to enforce the goals of the agreements. The agreements discussed include: Montreal Protocol on Substances that Deplete the Ozone Layer; Vienna Convention for the Protection of the Ozone Layer; Protocol on Substances that Deplete the Ozone Layer; Basel Convention on the Control of Transboundary Movements of Hazardous Wastes and their Disposal; Canada-United States: Agreement on Air Quality; Rio Declaration on Environment and Development; Framework Convention on Climate Change; Convention on Biological Diversity; and the North American Agreement on Environmental Cooperation. Part 3 discusses the general concern related to economic development (with the need to maintain ``sustainable development``), the possible environmental impact of NAFTA, and the Supplemental Agreement`s strengths and weaknesses.
This Final Report describes the accomplishments of the US Department of Energy (DOE) cooperative agreement project DE-FC26-04NT42113 - Truck Thermoacoustic Generator and Chiller - whose goal is to design, fabricate and test a thermoacoustic piezoelectric generator and chiller system for use on over-the-road heavy-duty-diesel trucks, driven alternatively by the waste heat of the main diesel engine exhaust or by a burner integrated into the thermoacoustic system. The thermoacoustic system would utilize engine exhaust waste heat to generate electricity and cab air conditioning, and would also function as an auxiliary power unit (APU) for idle reduction. The unit was to be tested in Volvo engine performance and endurance test cells and then integrated onto a Class 8 over-the-road heavy-duty-diesel truck for further testing on the road. The project has been a collaboration of The Pennsylvania State University Applied Research Laboratory, Los Alamos National Laboratory, Clean Power Resources Inc., and Volvo Powertrain (Mack Trucks Inc.). Cost share funding was provided by Applied Research Laboratory, and by Clean Power Resources Inc via its grant from Innovation Works - funding that was derived from the Commonwealth of Pennsylvania. Los Alamos received its funding separately through DOE Field Work Proposal 04EE09.
This book is about our ways of thinking and about how they need to be and can be changed. It is not about the ''unparalleled catastrophe.'' By now many of us know much about that, and unless we an see clear, acceptable, and practical ways to prevent it, our minds recoil from the whole horrible subject. Therefore, the book is about the prevention of nuclear war and nothing else. At least, that is its purpose. Yet its method is primarily descriptive and analytical rather than action-oriented. It explores from different perspectives the possible causes of a world war that could be at the outset, or become, nuclear, with a special focus on the often-neglected psychological aspects of those causes. It is diagnosis more than prescription. In fact, it might be described as a many-sided effort to understand the nature and roots of the ''madness'' of our present drift toward a great war that each side is urgently-desperately-anxious to avoid. In so doing it draws on some of the insights of psychiatry (from the psychiatrists Robert Jay Lifton, John E. Mack, Jerome D. Frank, and Erich Fromm), as well as on the three disciplines that provide the chief foundation for the book: history, political science, and social psychology.
The project began under a corporative agreement between Mack Trucks, Inc and the Department of Energy starting from September 1, 2005. The major objective of the four year project is to demonstrate a 10% efficiency gain by operating a Volvo 13 Litre heavy-duty diesel engine at a constant or narrow speed and coupled to a continuously variable transmission. The simulation work on the Constant Speed Engine started on October 1st. The initial simulations are aimed to give a basic engine model for the VTEC vehicle simulations. Compressor and turbine maps are based upon existing maps and/or qualified, realistic estimations. The reference engine is a MD 13 US07 475 Hp. Phase I was completed in May 2006 which determined that an increase in fuel efficiency for the engine of 10.5% over the OICA cycle, and 8.2% over a road cycle was possible. The net increase in fuel efficiency would be 5% when coupled to a CVT and operated over simulated highway conditions. In Phase II an economic analysis was performed on the engine with turbocompound (TC) and a Continuously Variable Transmission (CVT). The system was analyzed to determine the payback time needed for the added cost of the TC and CVT system. The analysis was performed by considering two different production scenarios of 10,000 and 60,000 units annually. The cost estimate includes the turbocharger, the turbocompound unit, the interstage duct diffuser and installation details, the modifications necessary on the engine and the CVT. Even with the cheapest fuel and the lowest improvement, the pay back time is only slightly more than 12 months. A gear train is necessary between the engine crankshaft and turbocompound unit. This is considered to be relatively straight forward with no design problems.
Rohrbach, Ron; Barron, Ann
(Johnson Matthey), a CIDI engine manufacturer (Navistar Inc. (formerly International Truck & Engine Corporation) and Mack Trucks Inc.), and filter recycler (American Wastes Industries).
Scott Smith; Karla Younessi; Matt Markstaller; Dan Schlesinger; Bhaskar Bhatnagar; Donald Smith; Bruno Banceu; Ron Schoon; V.K. Sharma; Mark Kachmarsky; Srikant Ghantae; Michael Sorrels; Conal Deedy; Justin Clark; Skip Yeakel; Michael D. Laughlin; Charlotte Seigler; Sidney Diamond
Class 8 heavy-duty trucks account for over three-quarters of the total diesel fuel used by commercial trucks (trucks with GVWRs more than 10,000 pounds) in the United States each year. At the highway speeds at which these trucks travel (i.e., 60 mph or greater), aerodynamic drag is a major part of total horsepower needed to move the truck down the highway, Reductions in aerodynamic drag can yield measurable benefits in fuel economy through the use of relatively inexpensive and simple devices. The goal of this project was to examine a number of aerodynamic drag reduction devices and systems and determine their effectiveness in reducing aerodynamic drag of Class 8 tractor/semitrailer combination-units, thus contributing to DOE's goal of reducing transportation petroleum use. The project team included major heavy truck manufacturers in the United States, along with the management and industry expertise of the Truck Manufacturers Association as the lead investigative organization. The Truck Manufacturers Association (TMA) is the national trade association representing the major North American manufacturers of Class 6-8 trucks (GVWRs over 19,500 lbs). Four major truck manufacturers participated in this project with TMA: Freightliner LLC; International Truck and Engine Corporation; Mack Trucks Inc.; and Volvo Trucks North America, Inc. Together, these manufacturers represent over three-quarters of total Class 8 truck sales in the United States. These four manufacturers pursued complementary research efforts as part of this project. The project work was separated into two phases conducted over a two-year period. In Phase I, candidate aerodynamic devices and systems were screened to focus research and development attention on devices that offered the most potential. This was accomplished using full-size vehicle tests, scale model tests, and computational fluid dynamics analyses. In Phase II, the most promising devices were installed on full-size trucks and their effect on