Chris Frey

Also known as: Henry C. Frey, H.C. Frey

https://orcid.org/0000-0001-9450-0804

variability, uncertainty, emissions, air pollution, air quality, exposure, risk, transportation, vehicle, energy, power generation

Dr. Frey's interests are broadly in energy and environmental systems, including: modeling and evaluation of advanced energy conversion (e.g.,combustion, gasification) and environmental control systems; measurement and modeling of real-world fuel use and emissions of onroad and nonroad vehicles; development and application of methods for quantification of variability and uncertainty and for sensitivity analysis in systems models; and exposure and risk analysis

Works (212)

Updated: July 29th, 2023 21:15

2023 journal article

Contribution of Cold Starts to Real-World Trip Emissions for Light-Duty Gasoline Vehicles

ATMOSPHERE, 14(1).

By: J. Hu*, H. Freyโ€‰ n & B. Boroujeni*

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ
author keywords: vehicle; emissions; measurement; exhaust; cold start; air pollution; gasoline
Sources: Web Of Science, ORCID
Added: December 28, 2022

2023 journal article

Simple Diesel Train Fuel Consumption Model for Real-Time Train Applications

ENERGIES, 16(8).

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ
author keywords: diesel train; energy consumption model; train simulation
Sources: ORCID, Web Of Science
Added: April 21, 2023

2022 journal article

Fuel use and emission rates reduction potential for light-duty gasoline vehicle eco-driving

TRANSPORTATION RESEARCH PART D-TRANSPORT AND ENVIRONMENT, 109.

By: W. Yuan*โ€‰, C. Frey*โ€‰ & T. Wei*

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ
author keywords: Driving strategy; Fuel consumption; Air pollution; Tailpipe exhaust; Emission hotspot; Autonomous vehicle
Sources: Web Of Science, ORCID
Added: August 15, 2022

2022 journal article

Intermodal comparison of tailpipe emission rates between transit buses and private vehicles for on-road passenger transport

ATMOSPHERIC ENVIRONMENT, 281.

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ
author keywords: Transit bus; Private vehicle; Emissions; Passenger load; Carbon dioxide
Sources: Web Of Science, ORCID
Added: June 20, 2022

2022 article

Microenvironment Tracker (MicroTrac) model to estimate time-location of individuals for air pollution exposure assessments: model evaluation using smartphone data

Breen, M. S. S., Xu, Y., Frey, H. C., Breen, M., & Isakov, V. (2022, December 16). JOURNAL OF EXPOSURE SCIENCE AND ENVIRONMENTAL EPIDEMIOLOGY, Vol. 12.

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ
author keywords: Smartphone; GPS; Microenvironment; exposure assessment; Air pollution
MeSH headings : Humans; Smartphone; Air Pollution / analysis; Air Pollutants / analysis; Time; Environmental Pollutants; Environmental Exposure / analysis; Environmental Monitoring / methods
Sources: Web Of Science, ORCID
Added: January 9, 2023

2021 journal article

Characterizing Fuel Use and Emission Hotspots for a Diesel-Operated Passenger Rail Service

ENVIRONMENTAL SCIENCE & TECHNOLOGY, 55(15), 10633โ€“10644.

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ
author keywords: passenger train emissions; emission hotspots; spatial variability; hotspot location
MeSH headings : Air Pollutants / analysis; Gasoline / analysis; Vehicle Emissions / analysis
Sources: ORCID, Web Of Science
Added: July 17, 2021

2021 journal article

Combined effects of increased O-3 and reduced NO2 concentrations on short-term air pollution health risks in Hong Kong

ENVIRONMENTAL POLLUTION, 270.

co-author countries: China ๐Ÿ‡จ๐Ÿ‡ณ Hong Kong ๐Ÿ‡ญ๐Ÿ‡ฐ United States of America ๐Ÿ‡บ๐Ÿ‡ธ
author keywords: Nitrogen dioxide; Ozone; Short-term health risk; Health risk tradeoffs; Control measures
MeSH headings : Air Pollutants / analysis; Air Pollution / analysis; Hong Kong; Nitrogen Dioxide / analysis; Ozone / analysis; Particulate Matter / analysis
Sources: Web Of Science, ORCID
Added: February 15, 2021

2021 journal article

Factors affecting variability in infiltration of ambient particle and gaseous pollutants into home at urban environment

BUILDING AND ENVIRONMENT, 206.

By: M. Hossain n, W. Cheโ€‰*, H. Freyโ€‰ n & A. Lau*

co-author countries: China ๐Ÿ‡จ๐Ÿ‡ณ Hong Kong ๐Ÿ‡ญ๐Ÿ‡ฐ United States of America ๐Ÿ‡บ๐Ÿ‡ธ
author keywords: PM2.5; NO2; O-3; Infiltration factors; Predictors; Home
Sources: ORCID, Web Of Science
Added: September 15, 2021

2021 journal article

Multi-scale evaluation of diesel commuter rail fuel use, emissions, and eco-driving

TRANSPORTATION RESEARCH PART D-TRANSPORT AND ENVIRONMENT, 99.

By: W. Yuan nโ€‰ & H. Freyโ€‰ n

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ

Contributors: W. Yuan nโ€‰ & H. Freyโ€‰ n

author keywords: Public transport; Diesel locomotive; Energy; Air pollution; Emission hotspot
Sources: Web Of Science, ORCID
Added: October 12, 2021

2021 journal article

Real-world activity, fuel use, and emissions of heavy-duty compressed natural gas refuse trucks

SCIENCE OF THE TOTAL ENVIRONMENT, 761.

By: G. Sandhu, H. Freyโ€‰ n, S. Bartelt-Huntโ€‰* & E. Jones*

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ
author keywords: Compressed natural gas; Refuse truck; Heavy-duty vehicles; PEMS; Tailpipe emissions; MOVES
Sources: Web Of Science, ORCID
Added: February 15, 2021

2021 article

Sensitivity of light duty vehicle tailpipe emission rates from simplified portable emission measurement systems to variation in engine volumetric efficiency

Wei, T., & Frey, H. C. (2021, June 10). JOURNAL OF THE AIR & WASTE MANAGEMENT ASSOCIATION, Vol. 6.

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ
MeSH headings : Air Pollutants / analysis; Gasoline / analysis; Motor Vehicles; Vehicle Emissions / analysis
Sources: ORCID, Web Of Science
Added: May 6, 2021

2020 journal article

Evaluation of the Precision and Accuracy of Cycle-Average Light Duty Gasoline Vehicles Tailpipe Emission Rates Predicted by Modal Models

TRANSPORTATION RESEARCH RECORD, 2674(7), 566โ€“584.

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ
Sources: Web Of Science, ORCID
Added: July 20, 2020

2020 journal article

Factors affecting variability in fossil-fueled transit bus emission rates

ATMOSPHERIC ENVIRONMENT, 233.

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ
author keywords: Transit bus; Exhaust emissions; Bus size; Passenger load
Sources: Web Of Science, ORCID
Added: June 29, 2020

2020 journal article

Geospatial Variation of Real-World Tailpipe Emission Rates for Light-Duty Gasoline Vehicles

Environmental Science & Technology, 54(14), 8968โ€“8979.

By: T. Khan nโ€‰, H. Freyโ€‰ n, N. Rastogi n & T. Wei n

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ

Contributors: T. Khan nโ€‰, H. Freyโ€‰ n, N. Rastogi n & T. Wei n

MeSH headings : Air Pollutants / analysis; Carbon Dioxide / analysis; Carbon Monoxide; Environmental Monitoring; Gasoline / analysis; Motor Vehicles; Nitrogen Oxides / analysis; Vehicle Emissions / analysis
Source: ORCID
Added: July 9, 2020

2020 journal article

PRAISE -HK: A personalized real-time air quality informatics system for citizen participation in exposure and health risk management

SUSTAINABLE CITIES AND SOCIETY, 54.

By: W. Cheโ€‰*, H. Freyโ€‰ n, J. Fungโ€‰*, Z. Ningโ€‰*, H. Quโ€‰*, H. Loโ€‰*, L. Chenโ€‰*, T. Wong* ...

co-author countries: China ๐Ÿ‡จ๐Ÿ‡ณ United Kingdom of Great Britain and Northern Ireland ๐Ÿ‡ฌ๐Ÿ‡ง Hong Kong ๐Ÿ‡ญ๐Ÿ‡ฐ United States of America ๐Ÿ‡บ๐Ÿ‡ธ
author keywords: Air pollution; Personalized exposure; Individual health sensitivity; Citizen engagement
Sources: Web Of Science, ORCID
Added: July 20, 2020

2020 journal article

Potential for metro rail energy savings and emissions reduction via eco-driving

APPLIED ENERGY, 268.

By: W. Yuan nโ€‰ & H. Freyโ€‰ n

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ
author keywords: Public transport; Automatic train operation; Energy efficiency; Eco-driving; Electricity; Markov chain
Sources: Web Of Science, ORCID
Added: June 22, 2020

2020 journal article

Quantification of Sources of Variability of Air Pollutant Exposure Concentrations Among Selected Transportation Microenvironments

TRANSPORTATION RESEARCH RECORD, 2674(9), 395โ€“411.

By: H. Freyโ€‰ n, D. Gadre, S. Singh & P. Kumarโ€‰*

co-author countries: United Kingdom of Great Britain and Northern Ireland ๐Ÿ‡ฌ๐Ÿ‡ง United States of America ๐Ÿ‡บ๐Ÿ‡ธ
Sources: Web Of Science, ORCID
Added: July 27, 2020

2020 journal article

Variability in Measured Real-World Operational Energy Use and Emission Rates of a Plug-In Hybrid Electric Vehicle

Energies.

By: H. Freyโ€‰ n, X. Zheng n & J. Hu n

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ
author keywords: light duty gasoline vehicle; portable emission measurement system; carbon dioxide emissions; carbon monoxide emissions; nitrogen oxides emissions; hydrocarbon emissions; cold start
Source: ORCID
Added: March 5, 2020

2019 journal article

Comparison of real-world vehicle fuel use and tailpipe emissions for gasoline-ethanol fuel blends

FUEL, 249, 352โ€“364.

By: W. Yuan nโ€‰, H. Freyโ€‰ n, T. Wei n, N. Rastogi n, S. VanderGriend*, D. Miller*, L. Mattison*

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ
author keywords: Ethanol; Octane; Real-world driving; Portable emission measurement system; Exhaust emissions
Sources: Web Of Science, ORCID
Added: May 6, 2019

2019 journal article

Effect of Air-Conditioning on Light Duty Gasoline Vehicles Fuel Economy

TRANSPORTATION RESEARCH RECORD, 2673(5), 131โ€“141.

By: T. Khan nโ€‰ & H. Freyโ€‰ n

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ

Contributors: T. Khan nโ€‰ & H. Freyโ€‰ n

Sources: Web Of Science, ORCID
Added: July 15, 2019

2019 journal article

Indoor Exposure to Ambient Particles and Its Estimation Using Fixed Site Monitors

ENVIRONMENTAL SCIENCE & TECHNOLOGY, 53(2), 808โ€“819.

co-author countries: China ๐Ÿ‡จ๐Ÿ‡ณ Hong Kong ๐Ÿ‡ญ๐Ÿ‡ฐ United States of America ๐Ÿ‡บ๐Ÿ‡ธ
MeSH headings : Air Pollutants; Air Pollution, Indoor; Environmental Exposure; Environmental Monitoring; Hong Kong; Particle Size; Particulate Matter; Seasons
Sources: Web Of Science, ORCID
Added: February 11, 2019

2019 journal article

Quantification of Energy Saving Potential for A Passenger Train Based on Inter-Run Variability in Speed Trajectories

TRANSPORTATION RESEARCH RECORD, 2673(5), 153โ€“165.

By: W. Yuan nโ€‰, H. Freyโ€‰ n & N. Rastogi n

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ
Sources: Web Of Science, ORCID
Added: July 15, 2019

2018 journal article

A review of factors impacting exposure to PM2.5, ultrafine particles and black carbon in Asian transport microenvironments

Atmospheric Environment, 187, 301โ€“316.

co-author countries: United Kingdom of Great Britain and Northern Ireland ๐Ÿ‡ฌ๐Ÿ‡ง Ireland ๐Ÿ‡ฎ๐Ÿ‡ช United States of America ๐Ÿ‡บ๐Ÿ‡ธ
author keywords: Air pollution; Exposure; Asian cities; Transport microenvironments; Airborne ultrafine particles; Black carbon; PM2.5
Sources: Crossref, ORCID
Added: February 5, 2020

2018 journal article

Comparison of real-world and certification emission rates for light duty gasoline vehicles

SCIENCE OF THE TOTAL ENVIRONMENT, 622, 790โ€“800.

By: T. Khan nโ€‰ & H. Freyโ€‰ n

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ

Contributors: T. Khan nโ€‰ & H. Freyโ€‰ n

author keywords: Certification tests; Emission standards; PEMS; Chassis dynamometer; Driving cycles; Cold start emissions
Sources: Web Of Science, ORCID
Added: August 6, 2018

2018 journal article

Dynamics of coarse and fine particle exposure in transport microenvironments

NPJ CLIMATE AND ATMOSPHERIC SCIENCE, 1.

co-author countries: United Kingdom of Great Britain and Northern Ireland ๐Ÿ‡ฌ๐Ÿ‡ง India ๐Ÿ‡ฎ๐Ÿ‡ณ United States of America ๐Ÿ‡บ๐Ÿ‡ธ
Sources: Web Of Science, ORCID
Added: June 4, 2019

2018 journal article

Effect of Light Duty Vehicle Performance on a Driving Style Metric

TRANSPORTATION RESEARCH RECORD, 2672(25), 67โ€“78.

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ
Sources: Web Of Science, ORCID
Added: May 28, 2019

2018 journal article

Factors affecting variability in PM 2.5 exposure concentrations in a metro system

Environmental Research, 160, 20โ€“26.

co-author countries: China ๐Ÿ‡จ๐Ÿ‡ณ Hong Kong ๐Ÿ‡ญ๐Ÿ‡ฐ United States of America ๐Ÿ‡บ๐Ÿ‡ธ
author keywords: PM2.5; Underground metro; Above-ground metro; Train in-cabin; Station platform; Hong; Kong
MeSH headings : Particulate Matter / analysis; Transportation Facilities / statistics & numerical data
Sources: Crossref, ORCID
Added: February 5, 2020

2018 journal article

Real-world fuel use and gaseous emission rates for flex fuel vehicles operated on E85 versus gasoline

JOURNAL OF THE AIR & WASTE MANAGEMENT ASSOCIATION, 68(3), 235โ€“254.

By: M. Delavarrafiee n & H. Freyโ€‰ n

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ
MeSH headings : Air Pollutants / analysis; Air Pollution; Carbon Monoxide / analysis; Ethanol; Gasoline; Hydrocarbons / analysis; Motor Vehicles; Nitric Oxide / analysis; Nitrogen Oxides / analysis; Ozone / analysis; Renewable Energy; Vehicle Emissions / analysis
Sources: Web Of Science, ORCID
Added: August 6, 2018

2018 journal article

Trends in on-road transportation, energy, and emissions

JOURNAL OF THE AIR & WASTE MANAGEMENT ASSOCIATION, 68(10), 1015โ€“1024.

By: S. Altshuler*, A. Ayalaโ€‰*, S. Collet*, J. Chowโ€‰*, H. Freyโ€‰ n, R. Shaikhโ€‰*, E. Stevenson*, M. Walsh, J. Watsonโ€‰*

co-author countries: China ๐Ÿ‡จ๐Ÿ‡ณ United States of America ๐Ÿ‡บ๐Ÿ‡ธ
Sources: Web Of Science, ORCID
Added: October 16, 2018

2018 review

Trends in onroad transportation energy and emissions

[Review of ]. JOURNAL OF THE AIR & WASTE MANAGEMENT ASSOCIATION, 68(6), 514โ€“563.

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ
Sources: Web Of Science, ORCID
Added: August 6, 2018

2017 journal article

Characterization of PM2.5 exposure concentration in transport microenvironments using portable monitors

ENVIRONMENTAL POLLUTION, 228, 433โ€“442.

co-author countries: China ๐Ÿ‡จ๐Ÿ‡ณ Hong Kong ๐Ÿ‡ญ๐Ÿ‡ฐ United States of America ๐Ÿ‡บ๐Ÿ‡ธ
author keywords: Portable monitors; PM2.5; Transport microenvironments; Minimum sample size; Hong Kong
MeSH headings : Air Pollutants / analysis; Air Pollution / analysis; Air Pollution, Indoor / analysis; Carbon Monoxide; Environmental Monitoring / instrumentation; Environmental Monitoring / methods; Hong Kong; Particle Size; Particulate Matter / analysis; Seasons; Ventilation
Sources: Web Of Science, ORCID
Added: August 6, 2018

2017 journal article

Real-World Freeway and Ramp Activity and Emissions for Light-Duty Gasoline Vehicles

TRANSPORTATION RESEARCH RECORD, (2627), 17โ€“25.

By: H. Freyโ€‰ n, M. Delavarrafiee n & S. Singh n

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ
Sources: Web Of Science, ORCID
Added: August 6, 2018

2016 journal article

Comparison of Vehicle-Specific Fuel Use and Emissions Models Based on Externally and Internally Observable Activity Data

TRANSPORTATION RESEARCH RECORD, (2570), 30โ€“38.

By: J. Hu n, H. Frey & S. Washburnโ€‰*

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ
Sources: Web Of Science, ORCID
Added: August 6, 2018

2016 article

Dose-Response Models are Conditional on Determination of Causality

Frey, H. C. (2016, September). RISK ANALYSIS, Vol. 36, pp. 1751โ€“1754.

By: H. Frey

Sources: Web Of Science, ORCID
Added: August 6, 2018

2016 journal article

Effect of Biodiesel Fuels on Real-World Emissions of Passenger Locomotives

ENVIRONMENTAL SCIENCE & TECHNOLOGY, 50(21), 12030โ€“12039.

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ
MeSH headings : Biofuels; Gasoline; Nitrogen Oxides; Particulate Matter; Vehicle Emissions
Sources: Web Of Science, ORCID
Added: August 6, 2018

2016 journal article

Evaluation of Light-Duty Gasoline Vehicle Rated Fuel Economy Based on In-Use Measurements

TRANSPORTATION RESEARCH RECORD, 2570(2570), 21โ€“29.

By: T. Khan nโ€‰ & H. Freyโ€‰ n

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ

Contributors: T. Khan nโ€‰ & H. Freyโ€‰ n

Sources: Web Of Science, ORCID
Added: August 6, 2018

2016 journal article

Highway Vehicle Emissions Avoided by Diesel Passenger Rail Service Based on Real-World Data

Urban Rail Transit, 2(3-4), 153โ€“171.

By: B. Graver n & H. Freyโ€‰ n

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ
author keywords: Intercity rail; Energy intensity; Emissions; Carbon dioxide; Nitrogen oxides; Particulate matter
Source: ORCID
Added: April 26, 2019

2016 journal article

Real-world activity, fuel use, and emissions of diesel side-loader refuse trucks

ATMOSPHERIC ENVIRONMENT, 129, 98โ€“104.

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ
author keywords: Diesel; Truck; Duty cycle; Exhaust emissions; Measurement; Nitrogen oxides; Particulate matter; Emission rates; Engine; MOVES; Weight
Sources: Web Of Science, ORCID
Added: August 6, 2018

2016 journal article

Sequential Measurement of Intermodal Variability in Public Transportation PM2.5 and CO Exposure Concentrations

ENVIRONMENTAL SCIENCE & TECHNOLOGY, 50(16), 8760โ€“8769.

By: W. Che, H. Freyโ€‰ n & A. Lau

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ
MeSH headings : Air Pollutants; Environmental Exposure; Environmental Monitoring; Hong Kong; Particle Size; Particulate Matter; Transportation
Sources: Web Of Science, ORCID
Added: August 6, 2018

2015 journal article

Comparison of Over-the-Rail and Rail Yard Measurements of Diesel Locomotives

ENVIRONMENTAL SCIENCE & TECHNOLOGY, 49(21), 13031โ€“13039.

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ
MeSH headings : Air Pollutants / analysis; Gasoline / analysis; Transportation; United States; United States Environmental Protection Agency; Vehicle Emissions / analysis
Sources: Web Of Science, ORCID
Added: August 6, 2018

2015 journal article

Comparison of Sources of Variability in School Age Children Exposure to Ambient PM2.5

ENVIRONMENTAL SCIENCE & TECHNOLOGY, 49(3), 1511โ€“1520.

co-author countries: China ๐Ÿ‡จ๐Ÿ‡ณ Hong Kong ๐Ÿ‡ญ๐Ÿ‡ฐ United States of America ๐Ÿ‡บ๐Ÿ‡ธ
MeSH headings : Adolescent; Air Pollutants / analysis; Child; Environmental Exposure / analysis; Humans; Models, Theoretical; Particulate Matter / analysis; Seasons; United States
Sources: Web Of Science, ORCID
Added: August 6, 2018

2015 journal article

In-use activity, fuel use, and emissions of heavy-duty diesel roll-off refuse trucks

JOURNAL OF THE AIR & WASTE MANAGEMENT ASSOCIATION, 65(3), 306โ€“323.

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ
MeSH headings : Air Pollutants / chemistry; Environmental Monitoring / methods; Gasoline; Motor Vehicles; Refuse Disposal; Time Factors; Vehicle Emissions
Sources: Web Of Science, ORCID
Added: August 6, 2018

2015 journal article

Integrating a simplified emission estimation model and mesoscopic dynamic traffic simulator to efficiently evaluate emission impacts of traffic management strategies

TRANSPORTATION RESEARCH PART D-TRANSPORT AND ENVIRONMENT, 37, 123โ€“136.

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ
author keywords: Emission estimation; Dynamic traffic assignment; Integrated traffic emission model; Cross-resolution model
Sources: Web Of Science, ORCID
Added: August 6, 2018

2015 journal article

Measurement and Evaluation of Real-World Speed and Acceleration Activity Envelopes for Light-Duty Vehicles

TRANSPORTATION RESEARCH RECORD, (2503), 128โ€“136.

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ
Sources: Web Of Science, ORCID
Added: August 6, 2018

2015 journal article

Simplified method for comparing emissions in roundabouts and at signalized intersections

Transportation Research Record, (2517), 48โ€“60.

By: K. Salamati, N. Rouphail, H. Frey, B. Liu & B. Schroeder

Source: NC State University Libraries
Added: August 6, 2018

2015 journal article

Variability in Light-Duty Gasoline Vehicle Emission Factors from Trip-Based Real-World Measurements

ENVIRONMENTAL SCIENCE & TECHNOLOGY, 49(20), 12525โ€“12534.

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ
MeSH headings : Automobile Driving; Carbon Dioxide / analysis; Electricity; Gasoline; Models, Theoretical; Motor Vehicles / standards; Nitric Oxide / analysis; North Carolina; United States; United States Environmental Protection Agency; Vehicle Emissions / analysis
Sources: Web Of Science, ORCID
Added: August 6, 2018

2014 journal article

Application of AIMSUN microsimulation model to estimate emissions on signalized arterial corridors

Transportation Research Record, (2428), 75โ€“86.

By: A. Anya, N. Rouphail, H. Frey & B. Schroeder

Source: NC State University Libraries
Added: August 6, 2018

2014 journal article

Assessment of the Effect of Population and Diary Sampling Methods on Estimation of School-Age Children Exposure to Fine Particles

RISK ANALYSIS, 34(12), 2066โ€“2079.

co-author countries: China ๐Ÿ‡จ๐Ÿ‡ณ Hong Kong ๐Ÿ‡ญ๐Ÿ‡ฐ United States of America ๐Ÿ‡บ๐Ÿ‡ธ
author keywords: Children; exposure; microenvironment; modeling; particulate matter; variability
MeSH headings : Child; Environmental Exposure; Humans; Markov Chains; North Carolina; Particulate Matter
Sources: Web Of Science, ORCID
Added: August 6, 2018

2014 journal article

Comparison of Fine Particulate Matter and Carbon Monoxide Exposure Concentrations for Selected Transportation Modes

TRANSPORTATION RESEARCH RECORD, (2428), 54โ€“62.

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ
Sources: Web Of Science, ORCID
Added: August 6, 2018

2014 journal article

In-use measurement of the activity, fuel use, and emissions of front-loader refuse trucks

ATMOSPHERIC ENVIRONMENT, 92, 557โ€“565.

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ
author keywords: Diesel refuse truck; Duty cycle; Exhaust emissions; Nitrogen oxides; Particulate matter; MOVES
Sources: Web Of Science, ORCID
Added: August 6, 2018

2014 journal article

Method for Modeling Driving Cycles, Fuel Use, and Emissions for Over Snow Vehicles

ENVIRONMENTAL SCIENCE & TECHNOLOGY, 48(14), 8258โ€“8265.

By: J. Hu n, H. Freyโ€‰ n, G. Sandhu n, B. Graver n, G. Bishopโ€‰*, B. Schuchmann*, J. Ray*

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ
MeSH headings : Carbon Monoxide / analysis; Gasoline; Kinetics; Linear Models; Models, Theoretical; Nitrogen Oxides / analysis; Off-Road Motor Vehicles; Particulate Matter / analysis; Snow; Vehicle Emissions / analysis
Sources: Web Of Science, ORCID
Added: August 6, 2018

2014 journal article

Road grade quantification based on global positioning system data obtained from real-world vehicle fuel use and emissions measurements

ATMOSPHERIC ENVIRONMENT, 85, 179โ€“186.

By: B. Boroujeni n & H. Freyโ€‰ n

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ
author keywords: Vehicle; Emissions; Road grade; GPS; Vehicle specific power
Sources: Web Of Science, ORCID
Added: August 6, 2018

2013 journal article

Comparing exposure metrics for the effects of fine particulate matter on emergency hospital admissions

JOURNAL OF EXPOSURE SCIENCE AND ENVIRONMENTAL EPIDEMIOLOGY, 23(6), 627โ€“636.

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ
author keywords: ambient monitoring data; CMAQ; SHEDS; PM2.5
MeSH headings : Air Pollutants / toxicity; Emergency Service, Hospital / statistics & numerical data; Environmental Exposure; Humans; Particulate Matter; Patient Admission
Sources: Web Of Science, ORCID
Added: August 6, 2018

2013 journal article

Comparison of Locomotive Emissions Measured During Dynamometer Versus Rail Yard Engine Load Tests

TRANSPORTATION RESEARCH RECORD, (2341), 23โ€“33.

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ
Sources: Web Of Science, ORCID
Added: August 6, 2018

2013 journal article

Effects of errors on vehicle emission rates from portable emissions measurement systems

Transportation Research Record, (2340), 10โ€“19.

By: G. Sandhu & H. Frey

Source: NC State University Libraries
Added: August 6, 2018

2013 journal article

Emissions estimation at multilane roundabouts effects of movement and approach lane

Transportation Research Record, (2389), 12โ€“21.

By: K. Salamati, M. Coelho, P. Fernandes, N. Rouphail, H. Frey & J. Bandeira

Source: NC State University Libraries
Added: August 6, 2018

2013 journal article

Engine and Duty Cycle Variability in Diesel Construction Equipment Emissions

JOURNAL OF ENVIRONMENTAL ENGINEERING, 139(2), 261โ€“268.

By: S. Abolhasani & H. Freyโ€‰ n

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ

Contributors: S. Abolhasani

author keywords: Diesel engines; Air pollution; Emissions; Construction equipment; Pollutants; Fuel use; Greenhouse gas
Sources: Web Of Science, ORCID
Added: August 6, 2018

2013 journal article

Method for Measuring the Ratio of In-Vehicle to Near-Vehicle Exposure Concentrations of Airborne Fine Particles

TRANSPORTATION RESEARCH RECORD, (2341), 34โ€“42.

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ
Sources: Web Of Science, ORCID
Added: August 6, 2018

2013 journal article

Road Grade Measurement Using In-Vehicle, Stand-Alone GPS with Barometric Altimeter

JOURNAL OF TRANSPORTATION ENGINEERING-ASCE, 139(6), 605โ€“611.

By: B. Boroujeni n, H. Freyโ€‰ n & G. Sandhu n

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ
author keywords: Vehicle; Emissions; Highway; Road grade; Engine load; Speed; Acceleration; Vertical curvature; Distance; Global positioning system (GPS)
Sources: Web Of Science, ORCID
Added: August 6, 2018

2012 journal article

Assessment of Inter-Individual, Geographic, and Seasonal Variability in Estimated Human Exposure to Fine Particles

ENVIRONMENTAL SCIENCE & TECHNOLOGY, 46(22), 12519โ€“12526.

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ

Contributors: W. Jiao n

MeSH headings : Aged; Air Pollutants / analysis; Cities; Computer Simulation; Environmental Monitoring / methods; Female; Humans; Inhalation Exposure; Male; Models, Theoretical; New York City; North Carolina; Particle Size; Particulate Matter / analysis; Seasons; Texas
Sources: Web Of Science, ORCID
Added: August 6, 2018

2012 journal article

Effects of Engine Idling on National Ambient Air Quality Standards Criteria Pollutant Emissions from Nonroad Diesel Construction Equipment

TRANSPORTATION RESEARCH RECORD, (2270), 67โ€“75.

By: P. Lewis*, W. Rasdorf n, H. Freyโ€‰ n & M. Leming n

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ
Sources: Web Of Science, ORCID
Added: August 6, 2018

2012 journal article

Evaluation of On-Site Fuel Use and Emissions over the Duration of a Commercial Building Project

JOURNAL OF INFRASTRUCTURE SYSTEMS, 18(2), 119โ€“129.

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ

Contributors: W. Rasdorf n

author keywords: Air pollution; Construction equipment; Engines; Emissions; Resource allocation; Pollutants; Project management; Fuel consumption; Commercial buildings
Sources: Web Of Science, ORCID
Added: August 6, 2018

2012 journal article

Evaluation of representativeness of site-specific fuel-based vehicle emission factors for route average emissions

Environmental Science and Technology, 46(12), 6867โ€“6873.

co-author countries: Korea (Republic of) ๐Ÿ‡ฐ๐Ÿ‡ท United States of America ๐Ÿ‡บ๐Ÿ‡ธ

Contributors: T. Leeโ€‰*

MeSH headings : Motor Vehicles; Vehicle Emissions
Source: ORCID
Added: April 26, 2019

2012 journal article

Methodology for Estimating Emissions Inventories for Commercial Building Projects

Journal of Architectural Engineering, 18(3), 251โ€“260.

By: S. Marshall n, W. Rasdorf n, P. Lewisโ€‰* & H. Freyโ€‰ n

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ

Contributors: S. Marshall n

author keywords: Air pollution; Green construction; Green buildings; Construction equipment; Diesel engines; Emissions; Greenhouse gases; Emissions inventories; Pollutants; Sustainability
Sources: ORCID, Crossref
Added: April 26, 2019

2012 journal article

Modeling of Human Exposure to In-Vehicle PM2.5 from Environmental Tobacco Smoke

HUMAN AND ECOLOGICAL RISK ASSESSMENT, 18(3), 608โ€“626.

By: Y. Cao* & H. Frey

Contributors: Y. Cao*

author keywords: tobacco smoke; vehicles; exposure; PM2.5; variability; inhalation
Sources: Web Of Science, ORCID
Added: August 6, 2018

2012 journal article

Portable Emission Measurement System for Emissions of Passenger Rail Locomotives

TRANSPORTATION RESEARCH RECORD, (2289), 56โ€“63.

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ

Contributors: H. Freyโ€‰ n

Sources: Web Of Science, ORCID
Added: August 6, 2018

2012 journal article

Real-world measurement and evaluation of duty cycles, fuels, and emission control technologies of heavy-duty trucks

Transportation Research Record, (2270), 180โ€“187.

By: G. Sandhu & H. Frey

Source: NC State University Libraries
Added: August 6, 2018

2012 journal article

Time series analysis of personal exposure to ambient air pollution and mortality using an exposure simulator

JOURNAL OF EXPOSURE SCIENCE AND ENVIRONMENTAL EPIDEMIOLOGY, 22(5), 483โ€“488.

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ

Contributors: H. Changโ€‰*

author keywords: exposure modeling; particulate matter; time series analysis
MeSH headings : Air Pollution / adverse effects; Environmental Exposure / adverse effects; Environmental Exposure / statistics & numerical data; Humans; Markov Chains; Models, Statistical; Mortality; New York City / epidemiology; Particulate Matter / adverse effects; Risk Assessment; Seasons; Stochastic Processes
Sources: Web Of Science, ORCID
Added: August 6, 2018

2011 journal article

Assessing Effects of Operational Efficiency on Pollutant Emissions of Nonroad Diesel Construction Equipment

TRANSPORTATION RESEARCH RECORD, (2233), 11โ€“18.

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ

Contributors: P. Lewisโ€‰*

Sources: Web Of Science, ORCID
Added: August 6, 2018

2011 journal article

Assessment of Interindividual and Geographic Variability in Human Exposure to Fine Particulate Matter in Environmental Tobacco Smoke

Risk Analysis, 31(4), 578โ€“591.

By: Y. Cao & H. Frey

Contributors: Y. Cao

author keywords: Environmental tobacco smoke; exposure; fine particulate matter; modeling; variability
MeSH headings : Algorithms; Environmental Exposure; Geography; Humans; Models, Theoretical; Particle Size; Smoke; Tobacco / chemistry; United States; United States Environmental Protection Agency
Source: ORCID
Added: April 26, 2019

2011 journal article

Comparison of driving schedule project level MOVES emission factors to empirical data

Proceedings of the Air and Waste Management Association's Annual Conference and Exhibition, AWMA, 3, 2445โ€“2454. http://www.scopus.com/inward/record.url?eid=2-s2.0-84859175012&partnerID=MN8TOARS

By: B. Liu & H. Frey

Contributors: B. Liu

Source: ORCID
Added: April 26, 2019

2011 journal article

Comparison of real-world activity, fuel use, and emissions for selected light duty gasoline vehicles based on driving cycles

Proceedings of the Air and Waste Management Association's Annual Conference and Exhibition, AWMA, 1, 600โ€“607. http://www.scopus.com/inward/record.url?eid=2-s2.0-84859094415&partnerID=MN8TOARS

By: Y. Sun & H. Frey

Contributors: Y. Sun

Source: ORCID
Added: April 26, 2019

2011 journal article

Fuel use and emission rates for F59PH locomotive engines tested on an engine dynamometer

Proceedings of the Air and Waste Management Association's Annual Conference and Exhibition, AWMA, 1, 614โ€“619. http://www.scopus.com/inward/record.url?eid=2-s2.0-84859054969&partnerID=MN8TOARS

By: B. Graver & H. Frey

Contributors: B. Graver

Source: ORCID
Added: April 26, 2019

2011 journal article

Geographic differences in inter-individual variability of human exposure to fine particulate matter

ATMOSPHERIC ENVIRONMENT, 45(32), 5684โ€“5691.

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ

Contributors: Y. Cao n

author keywords: Exposure; Particulate matter; Variability; Air exchange rate; Penetration factor; Deposition rate
Sources: Web Of Science, ORCID
Added: August 6, 2018

2011 journal article

In-Use Measurement of Activity, Energy Use, and Emissions of a Plug-in Hybrid Electric Vehicle

ENVIRONMENTAL SCIENCE & TECHNOLOGY, 45(20), 9044โ€“9051.

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ

Contributors: B. Graver n

MeSH headings : Air Pollutants / analysis; Electric Power Supplies; Electricity; Environmental Monitoring; Gasoline; Vehicle Emissions / analysis
Sources: Web Of Science, ORCID
Added: August 6, 2018

2011 journal article

Incorporating vehicle portable emissions measurement systems into the classroom

Proceedings of the Air and Waste Management Association's Annual Conference and Exhibition, AWMA, 1, 620โ€“637. http://www.scopus.com/inward/record.url?eid=2-s2.0-84859028524&partnerID=MN8TOARS

By: H. Frey, G. Sandhu, Y. Sun, T. Lee, H. Swidan, B. Liu, S. Babaee

Contributors: H. Frey

Source: ORCID
Added: April 26, 2019

2011 journal article

Modeling of hybrid and plug-in hybrid electric vehicle energy use and emissions based on in-use measurement

Proceedings of the Air and Waste Management Association's Annual Conference and Exhibition, AWMA, 1, 608โ€“613. http://www.scopus.com/inward/record.url?eid=2-s2.0-84859038443&partnerID=MN8TOARS

By: B. Graver & H. Frey

Contributors: B. Graver

Source: ORCID
Added: April 26, 2019

2011 journal article

Modeling of in-vehicle human exposure to ambient fine particulate matter

ATMOSPHERIC ENVIRONMENT, 45(27), 4745โ€“4752.

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ

Contributors: X. Liu n

author keywords: Particulate matter; Vehicles; Exposure; Variability; Sensitivity; Simulation
Sources: Web Of Science, ORCID
Added: August 6, 2018

2011 journal article

Variability in gram per gallon vehicle emission factors with engine load and among driving cycles

Proceedings of the Air and Waste Management Association's Annual Conference and Exhibition, AWMA, 3, 2335โ€“2341. http://www.scopus.com/inward/record.url?eid=2-s2.0-84859179711&partnerID=MN8TOARS

By: T. Lee & H. Frey

Contributors: T. Lee

Source: ORCID
Added: April 26, 2019

2010 journal article

Comparative assessment of passenger railroad locomotives using portable emission measurement systems

Proceedings of the Air and Waste Management Association's Annual Conference and Exhibition, AWMA, 7, 5249โ€“5255. http://www.scopus.com/inward/record.url?eid=2-s2.0-79956260289&partnerID=MN8TOARS

By: H. Frey, H. Choi, B. Graver & G. Sandhu

Contributors: H. Frey

Source: ORCID
Added: April 26, 2019

2010 journal article

Comprehensive Field Study of Fuel Use and Emissions of Nonroad Diesel Construction Equipment

TRANSPORTATION RESEARCH RECORD, (2158), 69โ€“76.

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ

Contributors: H. Freyโ€‰ n

Sources: Web Of Science, ORCID
Added: August 6, 2018

2010 journal article

Estimating Diesel Vehicle Emission Factors at Constant and High Speeds for Short Road Segments

TRANSPORTATION RESEARCH RECORD, (2158), 19โ€“27.

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ

Contributors: H. Choi n

Sources: Web Of Science, ORCID
Added: August 6, 2018

2010 journal article

Estimating In-Vehicle Concentration of and Exposure to Fine Particulate Matter Near-Roadway Ambient Air Quality and Variability in Vehicle Operation

TRANSPORTATION RESEARCH RECORD, (2158), 105โ€“112.

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ

Contributors: X. Liu n

Sources: Web Of Science, ORCID
Added: August 6, 2018

2010 conference paper

Estimating productivity-based fuel eifficiency and emissions factors of diesel construction equipment performing earthmoving activities

In N. M. B. Chimay J. Anumba, John Messner, & M. K. Parfitt (Eds.), Proceedings of the 6th International Conference on Innovation in Architecture, Engineering, and Construction. University Park, Pa. : Department of Architectural Engineering, Pennsylvania State University.

By: W. Rasdorf, P. Lewis & H. Frey

Ed(s): N. Chimay J. Anumba, . John Messner & M. Parfitt

Source: NC State University Libraries
Added: August 6, 2018

2010 journal article

Field Procedures for Real-World Measurements of Emissions from Diesel Construction Vehicles

JOURNAL OF INFRASTRUCTURE SYSTEMS, 16(3), 216โ€“225.

By: W. Rasdorf n, C. Frey nโ€‰, P. Lewis n, K. Kim n, S. Pang n & S. Abolhassani n

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ

Contributors: W. Rasdorf n

author keywords: Air pollution; Construction; Vehicles; Emissions; Life cycles; Pollutants; Sustainable development
Sources: Web Of Science, ORCID
Added: August 6, 2018

2010 journal article

Measurement and comparison of locomotive engine emissions

Proceedings of the Air and Waste Management Association's Annual Conference and Exhibition, AWMA, 7, 5272โ€“5280. http://www.scopus.com/inward/record.url?eid=2-s2.0-79956274785&partnerID=MN8TOARS

By: H. Frey, H. Choi, B. Graver & G. Sandhu

Contributors: H. Frey

Source: ORCID
Added: April 26, 2019

2010 journal article

Method for in-use measurement and evaluation of the activity, fuel use, electricity use, and emissions of a plug-in hybrid diesel-electric school bus

Environmental Science and Technology, 44(9), 3601โ€“3607.

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ

Contributors: H. Choi n

MeSH headings : Air Pollutants / analysis; Automobile Driving; Electricity; Environmental Monitoring / methods; Gasoline / analysis; Humans; Motor Vehicles; Transportation; Vehicle Emissions / analysis
Sources: NC State University Libraries, ORCID
Added: August 6, 2018

2010 journal article

Quantifying the microscale activity, energy use, and emissions of a plug-in hybrid electric vehicle based on in-use data

Proceedings of the Air and Waste Management Association's Annual Conference and Exhibition, AWMA, 1, 23โ€“45. http://www.scopus.com/inward/record.url?eid=2-s2.0-79956211810&partnerID=MN8TOARS

By: B. Graver & H. Frey

Contributors: B. Graver

Source: ORCID
Added: April 26, 2019

2010 journal article

Vehicle-Specific Emissions Modeling Based upon on-Road Measurements

ENVIRONMENTAL SCIENCE & TECHNOLOGY, 44(9), 3594โ€“3600.

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ

Contributors: H. Freyโ€‰ n

MeSH headings : Air Pollutants / analysis; Automobile Driving; Automobiles; Computer Simulation; Data Interpretation, Statistical; Environmental Monitoring / methods; Particulate Matter; Pressure; Regression Analysis; Transportation; Vehicle Emissions
Sources: Web Of Science, ORCID
Added: August 6, 2018

2009 journal article

A risk-based assessment and management framework for multipollutant air quality

Proceedings of the Air and Waste Management Association's Annual Conference and Exhibition, AWMA, 2, 1068โ€“1080. http://www.scopus.com/inward/record.url?eid=2-s2.0-77952278636&partnerID=MN8TOARS

By: H. Frey & B. Hubbell

Contributors: H. Frey

Source: ORCID
Added: April 26, 2019

2009 journal article

Analysis of coupled model uncertainties in source-to-dose modeling of human exposures to ambient air pollution: A PM2.5 case study

ATMOSPHERIC ENVIRONMENT, 43(9), 1641โ€“1649.

By: H. Oezkaynak, H. Freyโ€‰ n, J. Burke* & R. Pinder*

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ

Contributors: H. ร–zkaynak*

author keywords: Air quality model; Exposure model; Particulate matter; Variability; Uncertainty
Sources: Web Of Science, ORCID
Added: August 6, 2018

2009 journal article

Assessing methods for comparing emissions from gasoline and diesel light-duty vehicles based on microscale measurements

TRANSPORTATION RESEARCH PART D-TRANSPORT AND ENVIRONMENT, 14(2), 91โ€“99.

co-author countries: Belgium ๐Ÿ‡ง๐Ÿ‡ช Portugal ๐Ÿ‡ต๐Ÿ‡น United States of America ๐Ÿ‡บ๐Ÿ‡ธ

Contributors: M. Coelhoโ€‰*

author keywords: Diesel vehicles; Emissions; On-board measurements; Vehicle specific power
Sources: Web Of Science, ORCID
Added: August 6, 2018

2009 journal article

Comparison of Flexible Fuel Vehicle and Life-Cycle Fuel Consumption and Emissions of Selected Pollutants and Greenhouse Gases for Ethanol 85 Versus Gasoline

JOURNAL OF THE AIR & WASTE MANAGEMENT ASSOCIATION, 59(8), 912โ€“924.

By: H. Zhai n, H. Freyโ€‰ n, N. Rouphail n, G. Goncalves & T. Farias

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ

Contributors: H. Zhai n

MeSH headings : Air Pollutants / analysis; Bioelectric Energy Sources; Carbon Dioxide / analysis; Ethanol / chemistry; Gasoline / analysis; Models, Theoretical; Vehicle Emissions / analysis
Sources: ORCID, Web Of Science
Added: August 6, 2018

2009 journal article

Development and Use of Emissions Inventories for Construction Vehicles

TRANSPORTATION RESEARCH RECORD, (2123), 46โ€“53.

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ

Contributors: P. Lewis n

Sources: Web Of Science, ORCID
Added: August 6, 2018

2009 journal article

Effects of Idle Reduction Technologies on Real World Fuel Use and Exhaust Emissions of Idling Long-Haul Trucks

ENVIRONMENTAL SCIENCE & TECHNOLOGY, 43(17), 6875โ€“6881.

By: H. Freyโ€‰ n, P. Kuo n & C. Villa n

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ

Contributors: H. Freyโ€‰ n

MeSH headings : Conservation of Energy Resources; Engineering; Equipment Design; Gasoline / analysis; Motor Vehicles / standards; United States; Vehicle Emissions / analysis; Vehicle Emissions / prevention & control
Sources: Web Of Science, ORCID
Added: August 6, 2018

2009 journal article

Estimation of air carrier emissions at Raleigh-Durham international airport

Proceedings of the Air and Waste Management Association's Annual Conference and Exhibition, AWMA, 4, 2502โ€“2516. http://www.scopus.com/inward/record.url?eid=2-s2.0-77952383333&partnerID=MN8TOARS

By: B. Graver & H. Frey

Contributors: B. Graver

Source: ORCID
Added: April 26, 2019

2009 journal article

In-use measurement of the activity, energy use, and emissions of a plug-in hybrid electric vehicle

Proceedings of the Air and Waste Management Association's Annual Conference and Exhibition, AWMA, 2, 1127โ€“1144. http://www.scopus.com/inward/record.url?eid=2-s2.0-77952244297&partnerID=MN8TOARS

By: H. Frey, H. Choi, E. Pritchard & J. Lawrence

Contributors: H. Frey

Source: ORCID
Added: April 26, 2019

2009 journal article

In-use measurement of the activity, fuel use, and emissions of eight cement mixer trucks operated on each of petroleum diesel and soy-based B20 biodiesel

TRANSPORTATION RESEARCH PART D-TRANSPORT AND ENVIRONMENT, 14(8), 585โ€“592.

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ

Contributors: H. Freyโ€‰ n

author keywords: In-use; Emissions; Fuel use; Diesel; B20; Biodiesel; Cement mixer; Duty cycle
Sources: Web Of Science, ORCID
Added: August 6, 2018

2009 journal article

Life Cycle Inventory Energy Consumption and Emissions for Biodiesel versus Petroleum Diesel Fueled Construction Vehicles

Environmental Science & Technology, 43(16), 6398โ€“6405.

By: S. Pang n, H. Freyโ€‰ n & W. Rasdorf n

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ

Contributors: S. Pang n

MeSH headings : Bioelectric Energy Sources; Cities; Fossils; Gasoline / analysis; Geography; Motor Vehicles; Soybeans / growth & development; Uncertainty; Vehicle Emissions / analysis
Sources: ORCID, Crossref
Added: April 26, 2019

2009 journal article

Life cycle inventory energy consumption and emissions for biodiesel versus petroleum diesel fueled construction vehicles

Environmental Science & Technology, 43(16), 6398โ€“6405.

By: S. Pang, H. Frey & W. Rasdorf

Sources: NC State University Libraries, ORCID
Added: August 6, 2018

2009 journal article

Light duty gasoline vehicle emission factors at high transient and constant speeds for short road segments

TRANSPORTATION RESEARCH PART D-TRANSPORT AND ENVIRONMENT, 14(8), 610โ€“614.

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ
author keywords: Speed correction factor; Segment emissions; Near-roadway; Air quality study
Sources: Web Of Science, ORCID
Added: August 6, 2018

2009 journal article

Measurement of the energy use and emissions of passenger rail locomotives using a portable emission measurement system

Proceedings of the Air and Waste Management Association's Annual Conference and Exhibition, AWMA, 2, 1145โ€“1157. http://www.scopus.com/inward/record.url?eid=2-s2.0-77952268050&partnerID=MN8TOARS

By: H. Frey, H. Choi & K. Kim

Contributors: H. Frey

Source: ORCID
Added: April 26, 2019

2009 journal article

Modeling of in-vehicle PM2.5 exposure using the stochastic human exposure and dose simulation model

Proceedings of the Air and Waste Management Association's Annual Conference and Exhibition, AWMA, 2, 1087โ€“1100. http://www.scopus.com/inward/record.url?eid=2-s2.0-77952286694&partnerID=MN8TOARS

By: X. Liu, H. Frey, Y. Cao & B. Deshpande

Contributors: X. Liu

Source: ORCID
Added: April 26, 2019

2009 review

Probabilistic Exposure Analysis for Chemical Risk Characterization

[Review of ]. TOXICOLOGICAL SCIENCES, 109(1), 4โ€“17.

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ

Contributors: K. Bogenโ€‰*

author keywords: applied probability analysis; assessment methods; environmental chemicals; modeling; Monte Carlo; toxicity risk characterization
MeSH headings : Decision Making, Organizational; Environmental Exposure; Environmental Pollutants / toxicity; Hazardous Substances / toxicity; Humans; Models, Statistical; Monte Carlo Method; Risk Assessment / methods; Risk Management; Triage
Sources: Web Of Science, ORCID
Added: August 6, 2018

2009 journal article

Real-World Energy Use and Emission Rates for Idling Long-Haul Trucks and Selected Idle Reduction Technologies

JOURNAL OF THE AIR & WASTE MANAGEMENT ASSOCIATION, 59(7), 857โ€“864.

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ

Contributors: H. Freyโ€‰ n

MeSH headings : Conservation of Energy Resources; Equipment Design; Gasoline; Motor Vehicles; Vehicle Emissions / analysis
Sources: Web Of Science, ORCID
Added: August 6, 2018

2009 journal article

Regional On-Road Vehicle Running Emissions Modeling and Evaluation for Conventional and Alternative Vehicle Technologies

ENVIRONMENTAL SCIENCE & TECHNOLOGY, 43(21), 8449โ€“8455.

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ

Contributors: H. Freyโ€‰ n

MeSH headings : Environmental Restoration and Remediation / methods; Gasoline / analysis; Models, Chemical; Motor Vehicles; Time Factors; Vehicle Emissions / analysis
Sources: Web Of Science, ORCID
Added: August 6, 2018

2009 journal article

Requirements and Incentives for Reducing Construction Vehicle Emissions and Comparison of Nonroad Diesel Engine Emissions Data Sources

JOURNAL OF CONSTRUCTION ENGINEERING AND MANAGEMENT-ASCE, 135(5), 341โ€“351.

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ

Contributors: P. Lewis n

Sources: Web Of Science, ORCID
Added: August 6, 2018

2008 journal article

A Vehicle-Specific Power Approach to Speed- and Facility-Specific Emissions Estimates for Diesel Transit Buses

ENVIRONMENTAL SCIENCE & TECHNOLOGY, 42(21), 7985โ€“7991.

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ

Contributors: H. Zhai n

MeSH headings : Air Pollutants / analysis; Calibration; Carbon Dioxide / analysis; Confidence Intervals; Gasoline / analysis; Geographic Information Systems; Health Planning Guidelines; Models, Chemical; Motor Vehicles; Reproducibility of Results; Statistics, Nonparametric; Transportation / methods; Vehicle Emissions / analysis
Sources: Web Of Science, ORCID
Added: August 6, 2018

2008 journal article

Characterization of Real-World Activity, Fuel Use, and Emissions for Selected Motor Graders Fueled with Petroleum Diesel and B20 Biodiesel

JOURNAL OF THE AIR & WASTE MANAGEMENT ASSOCIATION, 58(10), 1274โ€“1287.

By: H. Frey, K. Kim*, S. Pang*, W. Rasdorf* & P. Lewis*

Contributors: H. Frey

Sources: Web Of Science, ORCID
Added: August 6, 2018

2008 journal article

Characterizing variability and uncertainty in exposure assessments improves links to environmental decision-making

EM: Air and Waste Management Association's Magazine for Environmental Managers, (JULY), 18โ€“22. http://www.scopus.com/inward/record.url?eid=2-s2.0-47749136225&partnerID=MN8TOARS

By: H. ร–zkaynak, H. Frey & B. Hubbell

Contributors: H. ร–zkaynak

Source: ORCID
Added: April 26, 2019

2008 journal article

Comparison of Real-World Emissions of B20 Biodiesel Versus Petroleum Diesel for Selected Nonroad Vehicles and Engine Tiers

TRANSPORTATION RESEARCH RECORD, (2058), 33โ€“42.

By: H. Freyโ€‰ n, W. Rasdorf n, K. Kim n, G. Pang* & P. Lewis n

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ

Contributors: H. Freyโ€‰ n

Sources: Web Of Science, ORCID
Added: August 6, 2018

2008 journal article

Comparison of fuel consumption and tailpipe emissions of ethanol 85 and gasoline for flexible fuel vehicles

Proceedings of the Air and Waste Management Association's Annual Conference and Exhibition, AWMA, 5, 3262โ€“3276. http://www.scopus.com/inward/record.url?eid=2-s2.0-70449498143&partnerID=MN8TOARS

By: H. Zhai, H. Frey, N. Rouphail, G. Gonรงalves & T. Farias

Contributors: H. Zhai

Source: ORCID
Added: April 26, 2019

2008 journal article

Estimating light duty gasoline vehicle emission factors at high transient and constant speeds for short road segments to support near-roadway air quality studies

Proceedings of the Air and Waste Management Association's Annual Conference and Exhibition, AWMA, 5, 3137โ€“3148. http://www.scopus.com/inward/record.url?eid=2-s2.0-70449500370&partnerID=MN8TOARS

By: H. Frey & H. Choi

Contributors: H. Frey

Source: ORCID
Added: April 26, 2019

2008 journal article

Evaluation of response time of a portable system for in-use vehicle tailpipe emissions measurement

ENVIRONMENTAL SCIENCE & TECHNOLOGY, 42(1), 221โ€“227.

By: K. Zhang n & C. Frey nโ€‰

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ

Contributors: K. Zhang n

MeSH headings : Air Pollutants / analysis; Carbon Dioxide / analysis; Carbon Monoxide / analysis; Environmental Monitoring / instrumentation; Environmental Monitoring / methods; Hydrocarbons / analysis; Motor Vehicles; Nitric Oxide / analysis; Time Factors; Vehicle Emissions / analysis
Sources: Web Of Science, ORCID
Added: August 6, 2018

2008 journal article

Fuel use and emissions comparisons for alternative routes, time of day, road grade, and vehicles based on in-use measurements

ENVIRONMENTAL SCIENCE & TECHNOLOGY, 42(7), 2483โ€“2489.

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ

Contributors: H. Freyโ€‰ n

MeSH headings : Gasoline; Motor Vehicles
Sources: Web Of Science, ORCID
Added: August 6, 2018

2008 conference paper

Impact of Alternative Vehicle Technologies on Measured Vehicle Emissions

Transportation Land Use, Planning, and Air Quality, 320.

By: H. Zhaiโ€‰ n, H. Freyโ€‰ n, N. Rouphail*, G. Gonรงalves & T. Farias

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ

Contributors: H. Zhaiโ€‰ n

Event: Transportation Land Use, Planning, and Air Quality Congress 2007

Sources: ORCID, Crossref
Added: April 26, 2019

2008 journal article

Link-based emission factors for heavy-duty diesel trucks based on real-world data

Transportation Research Record, (2058), 23โ€“32.

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ

Contributors: H. Freyโ€‰ n

Sources: ORCID, NC State University Libraries
Added: August 6, 2018

2008 journal article

Measurement and modeling of fuel use and exhaust emissions from idling Long-haul freight truck and auxiliary power unit engines

Proceedings of the Air and Waste Management Association's Annual Conference and Exhibition, AWMA, 5, 3060โ€“3064. http://www.scopus.com/inward/record.url?eid=2-s2.0-70449497001&partnerID=MN8TOARS

By: H. Frey, P. Kuo & C. Villa

Contributors: H. Frey

Source: ORCID
Added: April 26, 2019

2008 journal article

Methodology for characterization of long-haul truck idling activity under real-world conditions

TRANSPORTATION RESEARCH PART D-TRANSPORT AND ENVIRONMENT, 13(8), 516โ€“523.

By: H. Freyโ€‰ n, P. Kuo n & C. Villa*

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ
author keywords: Truck; Engine; Idle; Emissions; Diesel; Activity
Sources: Web Of Science, ORCID
Added: August 6, 2018

2008 report

Real-world duty cycles and utilization for construction equipment in North Carolina

In Technical Report- Not held in TRLN member libraries. Raleigh, N.C.: North Carolina Department of Transportation.

By: H. Frey, W. Rasdorf, K. Kim, S. Pang, P. Lewis & S. Abolhassani

Source: NC State University Libraries
Added: August 6, 2018

2008 journal article

Real-world in-use activity, fuel use, and emissions for nonroad construction vehicles: A case study for excavators

JOURNAL OF THE AIR & WASTE MANAGEMENT ASSOCIATION, 58(8), 1033โ€“1046.

By: S. Abolhasani n, H. Freyโ€‰ n, K. Kimโ€‰ n, W. Rasdorf n, P. Lewisโ€‰ n & S. Pang n

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ

Contributors: S. Abolhasani n

MeSH headings : Air Pollutants, Occupational / analysis; Environmental Monitoring; Fossil Fuels / analysis; Industry; Models, Statistical; Montana; Off-Road Motor Vehicles; Quality Control; Transportation; Vehicle Emissions / analysis
Sources: Web Of Science, ORCID
Added: August 6, 2018

2008 journal article

Vehicle-specific emissions modeling for non-road construction vehicles based upon real-world measurements

Proceedings of the Air and Waste Management Association's Annual Conference and Exhibition, AWMA, 5, 2743โ€“2749. http://www.scopus.com/inward/record.url?eid=2-s2.0-70449336768&partnerID=MN8TOARS

By: H. Frey, S. Pang & K. Kim

Contributors: H. Frey

Source: ORCID
Added: April 26, 2019

2008 journal article

What is uncertainty analysis and how can it be performed?

Toxicology Letters, 180, 3.

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ
Source: ORCID
Added: April 26, 2019

2007 journal article

Comparing real-world fuel consumption for diesel- and hydrogen-fueled transit buses and implication for emissions

TRANSPORTATION RESEARCH PART D-TRANSPORT AND ENVIRONMENT, 12(4), 281โ€“291.

By: H. Freyโ€‰ n, N. Rouphail n, H. Zhai n, T. Farias & G. Goncalves

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ

Contributors: H. Freyโ€‰ n

author keywords: fuel consumption; diesel buses; hydrogen fuel cells; vehicle specific power
Sources: Web Of Science, ORCID
Added: August 6, 2018

2007 journal article

Fuel consumption and emissions comparisons between ethanol 85 and gasoline fuels for flexible fuel vehicles

Proceedings of the Air and Waste Management Association's Annual Conference and Exhibition, AWMA, 5, 3104โ€“3108. http://www.scopus.com/inward/record.url?eid=2-s2.0-44649111256&partnerID=MN8TOARS

By: H. Zhai, H. Frey, N. Rouphail, G. Gonรงalves & T. Farias

Contributors: H. Zhai

Source: ORCID
Added: April 26, 2019

2007 report

Life cycle inventory and impact analysis framework for nonroad construction vehicles and equipment based upon in-use measurements

In Technical Report- Not held in TRLN member libraries. Raleigh, N.C.: National Science Foundation.

By: H. Frey, W. Rasdorf, K. Kim, S. Pang, P. Lewis & S. Abolhassani

Source: NC State University Libraries
Added: August 6, 2018

2007 conference paper

Methodology for activity, fuel use, and emissions data collection and analysis for nonroad construction equipment

Proceedings of the Air and Waste Management Association Annual Conference. Pittsburgh, PA: AWMA.

By: H. Frey, W. Rasdorf, S. Pang, K. Kim, S. Abolhasani & P. Lewis

Source: NC State University Libraries
Added: August 6, 2018

2007 journal article

Methodology for activity, fuel use, and emissions data collection and analysis for nonroad construction equipment

Proceedings of the Air and Waste Management Association's Annual Conference and Exhibition, AWMA, 5, 3124โ€“3128. http://www.scopus.com/inward/record.url?eid=2-s2.0-44649103903&partnerID=MN8TOARS

By: H. Frey, W. Rasdorf, S. Pang, K. Kim, S. Abolhasani & P. Lewis

Contributors: H. Frey

Source: ORCID
Added: April 26, 2019

2007 conference paper

Methods for measurement and analysis of in-use emissions of nonroad construction equipment

Proceedings of the EPA Emissions Inventory Conference. Raleigh, NC: EPA.

By: H. Frey, W. Rasdorf, S. Pang, K. Kim & P. Lewis

Source: NC State University Libraries
Added: August 6, 2018

2007 journal article

Potential best practices for reducing greenhouse gas (GHG) emissions in freight transportation

Proceedings of the Air and Waste Management Association's Annual Conference and Exhibition, AWMA, 5, 3099โ€“3103. http://www.scopus.com/inward/record.url?eid=2-s2.0-44649095696&partnerID=MN8TOARS

By: H. Frey & P. Kuo

Contributors: H. Frey

Source: ORCID
Added: April 26, 2019

2007 journal article

Second-order modeling of variability and uncertainty in microbial hazard characterization

JOURNAL OF FOOD PROTECTION, 70(2), 363โ€“372.

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ

Contributors: A. Vicariโ€‰ n

MeSH headings : Adolescent; Adult; Animals; Campylobacter jejuni / pathogenicity; Child; Child, Preschool; Colony Count, Microbial; Consumer Product Safety; Female; Food Contamination / analysis; Food Contamination / statistics & numerical data; Food Microbiology; Humans; Infant; Logistic Models; Male; Middle Aged; Models, Biological; Monte Carlo Method; Predictive Value of Tests; Risk Assessment
Sources: Web Of Science, ORCID
Added: August 6, 2018

2007 journal article

Simplified performance model of gas turbine combined cycle systems

Journal of Energy Engineering, 133(2), 82โ€“90.

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ

Contributors: Y. Zhuโ€‰ n

Sources: NC State University Libraries, ORCID
Added: August 6, 2018

2007 journal article

Spatial and temporal analysis of real-world empirical fuel use and emissions

Proceedings of the Air and Waste Management Association's Annual Conference and Exhibition, AWMA, 3, 2097โ€“2102. http://www.scopus.com/inward/record.url?eid=2-s2.0-44649198655&partnerID=MN8TOARS

By: H. Frey & K. Zhang

Contributors: H. Frey

Source: ORCID
Added: April 26, 2019

2006 review

Air emission inventories in North America: A critical assessment

[Review of ]. JOURNAL OF THE AIR & WASTE MANAGEMENT ASSOCIATION, 56(8), 1115โ€“1129.

By: C. Miller*, G. Hidy, J. Hales, C. Kolbโ€‰*, A. Werner, B. Haneke, D. Parrishโ€‰*, H. Freyโ€‰ n ...

co-author countries: Canada ๐Ÿ‡จ๐Ÿ‡ฆ Mexico ๐Ÿ‡ฒ๐Ÿ‡ฝ United States of America ๐Ÿ‡บ๐Ÿ‡ธ
MeSH headings : Air Pollutants, Occupational / analysis; Air Pollution / analysis; Algorithms; Environmental Monitoring / standards; Environmental Monitoring / statistics & numerical data; Equipment and Supplies; North America
Source: Web Of Science
Added: August 6, 2018

2006 journal article

Air emission inventories in North America: A critical assessment

Journal of the Air and Waste Management Association, 56(8), 1115โ€“1129. http://www.scopus.com/inward/record.url?eid=2-s2.0-33749135247&partnerID=MN8TOARS

By: C. Miller, G. Hidy, J. Hales, C. Kolb, A. Werner, B. Haneke, D. Parrish, H. Frey ...

Contributors: C. Miller

Source: ORCID
Added: April 26, 2019

2006 journal article

Application of classification and regression trees for sensitivity analysis of the Escherichia coli O157 : H7 food safety process risk model

JOURNAL OF FOOD PROTECTION, 69(3), 609โ€“618.

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ

Contributors: A. Mokhtari n

MeSH headings : Consumer Product Safety; Escherichia coli O157 / growth & development; Food Handling / methods; Food Microbiology; Food-Processing Industry / standards; Humans; Models, Biological; Regression Analysis; Risk Assessment / methods; Risk Assessment / standards; Sensitivity and Specificity; Temperature; Time Factors
Sources: Web Of Science, ORCID
Added: August 6, 2018

2006 journal article

Emissions comparison between dirt roads and paved roads using portable emissions measurement systems

Proceedings of the Air and Waste Management Association's Annual Conference and Exhibition, AWMA, 6, 3421โ€“3439. http://www.scopus.com/inward/record.url?eid=2-s2.0-33847791632&partnerID=MN8TOARS

By: J. Zietsman, D. Perkinson, H. Frey & K. Wieters

Contributors: J. Zietsman

Source: ORCID
Added: April 26, 2019

2006 journal article

Evaluation and recommendation of sensitivity analysis methods for application to Stochastic Human Exposure and Dose Simulation models

JOURNAL OF EXPOSURE SCIENCE AND ENVIRONMENTAL EPIDEMIOLOGY, 16(6), 491โ€“506.

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ

Contributors: A. Mokhtari n

author keywords: SHEDS models; sensitivity analysis; variance-based methods; sampling-based methods; risk assessment
MeSH headings : Analysis of Variance; Environmental Exposure / analysis; Environmental Pollutants / analysis; Fourier Analysis; Humans; Models, Theoretical; Pesticides / analysis; Risk Assessment; Sampling Studies; Sensitivity and Specificity; Statistics, Nonparametric; Stochastic Processes; United States; United States Environmental Protection Agency / standards
Sources: Web Of Science, ORCID
Added: August 6, 2018

2006 journal article

Evaluation of numerical models for simulation of real-world hot-stabilized fuel consumption and emissions of gasoline light-duty vehicles

TRANSPORTATION RESEARCH PART D-TRANSPORT AND ENVIRONMENT, 11(5), 377โ€“385.

By: C. Silva, T. Farias, H. Freyโ€‰ n & N. Rouphail n

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ

Contributors: C. Silva

author keywords: instantaneous fuel consumption and emissions models; road gasoline vehicles; on-board measurements; traffic induced driving cycles
Sources: Web Of Science, ORCID
Added: August 6, 2018

2006 journal article

Evaluation of sampling-based methods for sensitivity analysis: Case study for the E-Coli food safety process risk model

HUMAN AND ECOLOGICAL RISK ASSESSMENT, 12(6), 1128โ€“1152.

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ

Contributors: A. Mokhtari n

author keywords: sensitivity analysis; microbial food safety process risk models; two-dimensional probabilistic framework; variability; uncertainty
Sources: Web Of Science, ORCID
Added: August 6, 2018

2006 journal article

Improved system integration for integrated gasification combined cycle (IGCC) systems

ENVIRONMENTAL SCIENCE & TECHNOLOGY, 40(5), 1693โ€“1699.

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ

Contributors: H. Freyโ€‰ n

MeSH headings : Gases / chemistry; Nitrogen; Systems Integration; Water
Sources: Web Of Science, ORCID
Added: August 6, 2018

2006 journal article

Real-world data collection procedure for non-road construction equipment: Problems, solutions, and data quality assurance

Proceedings of the Air and Waste Management Association's Annual Conference and Exhibition, AWMA, 3, 1935โ€“1939. http://www.scopus.com/inward/record.url?eid=2-s2.0-33847776263&partnerID=MN8TOARS

By: K. Kim, S. Abolhasani, S. Pang & H. Frey

Contributors: K. Kim

Source: ORCID
Added: April 26, 2019

2006 journal article

Road grade estimation for on-road vehicle emissions modeling using light detection and ranging data

JOURNAL OF THE AIR & WASTE MANAGEMENT ASSOCIATION, 56(6), 777โ€“788.

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ

Contributors: K. Zhang n

MeSH headings : Air Pollutants / analysis; Carbon Dioxide / analysis; Carbon Monoxide / analysis; Environmental Monitoring; Gasoline; Hydrocarbons / analysis; Motor Vehicles; Nitric Oxide / analysis; Vehicle Emissions / analysis
Sources: Web Of Science, ORCID
Added: August 6, 2018

2006 journal article

Uncertainty analysis of integrated gasification combined cycle systems based on frame 7H versus 7F gas turbines

JOURNAL OF THE AIR & WASTE MANAGEMENT ASSOCIATION, 56(12), 1649โ€“1661.

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ

Contributors: Y. Zhuโ€‰*

MeSH headings : Coal; Conservation of Natural Resources; Costs and Cost Analysis; Electric Power Supplies; Energy-Generating Resources; Equipment Design; Forecasting; Fossil Fuels; Power Plants; Research; Risk; Thermodynamics; Uncertainty
Sources: Web Of Science, ORCID
Added: August 6, 2018

2006 journal article

Uncertainty for data with non-detects: Air toxic emissions from combustion

HUMAN AND ECOLOGICAL RISK ASSESSMENT, 12(6), 1171โ€“1191.

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ

Contributors: Y. Zhao n

author keywords: urban air toxics; emission factor; censored datasets; maximum likelihood estimation; bootstrap simulation
Sources: Web Of Science, ORCID
Added: August 6, 2018

2005 journal article

In-use emissions of heavy duty diesel dump trucks on petroleum diesel and B20 biodiesel fuels

Proceedings of the Air and Waste Management Association's Annual Conference and Exhibition, AWMA, 2005. http://www.scopus.com/inward/record.url?eid=2-s2.0-33646469610&partnerID=MN8TOARS

By: H. Frey & K. Kim

Contributors: H. Frey

Source: ORCID
Added: April 26, 2019

2005 journal article

Quantitative analysis of variability and uncertainty with known measurement error: Methodology and case study

RISK ANALYSIS, 25(3), 663โ€“675.

By: J. Zheng* & H. Frey

Contributors: J. Zheng*

author keywords: bootstrap pair; error-free data; measurement error; observed data; uncertainty; variability
Sources: Web Of Science, ORCID
Added: August 6, 2018

2005 journal article

Recommended practice regarding selection of sensitivity analysis methods applied to microbial food safety process risk models

HUMAN AND ECOLOGICAL RISK ASSESSMENT, 11(3), 591โ€“605.

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ

Contributors: A. Mokhtari n

author keywords: sensitivity analysis; microbial food safety process risk model; variability; uncertainty
Sources: Web Of Science, ORCID
Added: August 6, 2018

2005 journal article

Road grade estimation for on-road vehicle emissions modeling using lidar data

Proceedings of the Air and Waste Management Association's Annual Conference and Exhibition, AWMA, 2005. http://www.scopus.com/inward/record.url?eid=2-s2.0-33646469896&partnerID=MN8TOARS

By: K. Zhang & C. Freyโ€‰

Contributors: K. Zhang

Source: ORCID
Added: April 26, 2019

2005 journal article

Sensitivity analysis of a two-dimensional probabilistic risk assessment model using analysis of variance

RISK ANALYSIS, 25(6), 1511โ€“1529.

By: A. Mokhtari* & H. Frey

Contributors: A. Mokhtari*

author keywords: microbial food safety process risk models; sensitivity analysis; two-dimensional probabilistic framework; uncertainty; variability
MeSH headings : Analysis of Variance; Animals; Cattle; Escherichia coli O157 / isolation & purification; Escherichia coli O157 / pathogenicity; Food Microbiology; Meat / microbiology; Models, Statistical; Risk Assessment / statistics & numerical data; Risk Management; Safety; Sensitivity and Specificity
Sources: Web Of Science, ORCID
Added: August 6, 2018

2004 journal article

A Monte Carlo study of the uncertainties in predictions by ISC3ST and AERMOD of annual average benzene and 1,3-butadiene concentrations around the Houston Ship Channel

Proceedings of the Air and Waste Management Association's Annual Conference and Exhibition, AWMA, 3145โ€“3157. http://www.scopus.com/inward/record.url?eid=2-s2.0-21944432040&partnerID=MN8TOARS

By: S. Hanna, D. Heinold, R. Paine, H. Frey, D. Baker, R. Karp, H. Feldman

Contributors: S. Hanna

Source: ORCID
Added: April 26, 2019

2004 journal article

Assessment of uncertainty in benzene concentration estimates in the Houston, TX, area

Proceedings of the Air and Waste Management Association's Annual Conference and Exhibition, AWMA. http://www.scopus.com/inward/record.url?eid=2-s2.0-21944435254&partnerID=MN8TOARS

By: A. Hanna, J. Vukovich, S. Arunachalam, D. Loughlin, H. Frey & V. Isakov

Contributors: A. Hanna

Source: ORCID
Added: April 26, 2019

2004 journal article

Comparison of sensitivity analysis methods based on applications to a food safety risk assessment model

RISK ANALYSIS, 24(3), 573โ€“585.

By: . Patil & H. Frey

Contributors: S. Patil*

author keywords: complex models; critical control points; food safety; risk assessment; sensitivity analysis
MeSH headings : Analysis of Variance; Animals; Food Contamination / prevention & control; Food Microbiology; Foodborne Diseases / prevention & control; Humans; Models, Statistical; Ostreidae / microbiology; Refrigeration; Risk Assessment; Safety; Sensitivity and Specificity; Time Factors; Vibrio parahaemolyticus / isolation & purification; Vibrio parahaemolyticus / pathogenicity
Sources: Web Of Science, ORCID
Added: August 6, 2018

2004 journal article

Development of probabilistic emission inventories of air toxics for Jacksonville, Florida

JOURNAL OF THE AIR & WASTE MANAGEMENT ASSOCIATION, 54(11), 1405โ€“1421.

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ

Contributors: Y. Zhao n

MeSH headings : Air Pollutants / analysis; Cities; Florida; Forecasting; Models, Statistical; Risk Assessment
Sources: Web Of Science, ORCID
Added: August 6, 2018

2004 journal article

Development of probabilistic emission inventory of air toxics for Jacksonville, Florida

Proceedings of the Air and Waste Management Association's Annual Conference and Exhibition, AWMA. http://www.scopus.com/inward/record.url?eid=2-s2.0-21944442584&partnerID=MN8TOARS

By: Y. Zhao & H. Frey

Contributors: Y. Zhao

Source: ORCID
Added: April 26, 2019

2004 journal article

Optimization under variability and uncertainty: A case study for NOx emissions control for a gasification system

ENVIRONMENTAL SCIENCE & TECHNOLOGY, 38(24), 6741โ€“6747.

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ

Contributors: J. Chen n

MeSH headings : Air Pollution / economics; Air Pollution / prevention & control; Cost Savings; Cost-Benefit Analysis; Forecasting; Models, Theoretical; Nitrogen Oxides / analysis; Reproducibility of Results
Sources: Web Of Science, ORCID
Added: August 6, 2018

2004 journal article

Propagation of uncertainty in hourly utility NOx emissions through a photochemical grid air quality model: A case study for the Charlotte, NC, modeling domain

ENVIRONMENTAL SCIENCE & TECHNOLOGY, 38(7), 2153โ€“2160.

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ

Contributors: A. Abdel-Aziz n

MeSH headings : Air Pollutants / analysis; Environmental Monitoring; Forecasting; Models, Theoretical; Nitrogen Oxides / analysis; North Carolina; Oxidants, Photochemical / analysis; Ozone / analysis; Power Plants; Reproducibility of Results
Sources: Web Of Science, ORCID
Added: August 6, 2018

2004 journal article

Quantification of highway vehicle emissions hot spots based upon on-board measurements

JOURNAL OF THE AIR & WASTE MANAGEMENT ASSOCIATION, 54(2), 130โ€“140.

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ

Contributors: A. Unal n

MeSH headings : Air Pollutants / analysis; Data Collection; Environmental Monitoring / methods; Models, Theoretical; Vehicle Emissions / analysis
Sources: Web Of Science, ORCID
Added: August 6, 2018

2004 journal article

Quantification of variability and uncertainty for air toxic emission inventories with censored emission factor data

ENVIRONMENTAL SCIENCE & TECHNOLOGY, 38(22), 6094โ€“6100.

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ

Contributors: H. Freyโ€‰ n

MeSH headings : Air Pollutants / analysis; Cities; Forecasting; Likelihood Functions; Maximum Allowable Concentration; Models, Statistical; Risk Assessment; Texas
Sources: Web Of Science, ORCID
Added: August 6, 2018

2004 journal article

Quantification of variability and uncertainty for censored data sets and application to air toxic emission factors

RISK ANALYSIS, 24(4), 1019โ€“1034.

By: Y. Zhao & H. Frey

Contributors: Y. Zhao

author keywords: Bootstrap simulation; censored data sets; Kaplan-Meier estimator; maximum likelihood estimation; Monte Carlo simulation; nondetects; urban air toxics
MeSH headings : Air; Air Pollution; Confidence Intervals; Likelihood Functions; Models, Statistical; Monte Carlo Method; Risk Assessment; Statistics as Topic; Statistics, Nonparametric; Uncertainty
Sources: Web Of Science, ORCID
Added: August 6, 2018

2004 journal article

Quantification of variability and uncertainty using mixture distributions: Evaluation of sample size, mixing weights, and separation between components

RISK ANALYSIS, 24(3), 553โ€“571.

By: J. Zheng n & H. Frey

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ

Contributors: J. Zheng n

author keywords: bootstrap simulation; mixture distributions; parameter estimation; uncertainty; variability
Sources: Web Of Science, ORCID
Added: August 6, 2018

2003 journal article

Development of hourly probabilistic utility NOx emission inventories using time series techniques: Part I - univariate approach

ATMOSPHERIC ENVIRONMENT, 37(38), 5379โ€“5389.

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ

Contributors: A. Abdel-Aziz n

author keywords: autocorrelation; uncertainty; variability; emissions; nitrogen oxides
Sources: Web Of Science, ORCID
Added: August 6, 2018

2003 journal article

Development of hourly probabilistic utility NOx emission inventories using time series techniques: Part II - multivariate approach

ATMOSPHERIC ENVIRONMENT, 37(38), 5391โ€“5401.

By: A. Abdel-Aziz n & H. Frey

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ

Contributors: A. Abdel-Aziz n

author keywords: autocorrelation; uncertainty; variability; emissions; nitrogen oxides
Sources: Web Of Science, ORCID
Added: August 6, 2018

2003 chapter

Effect of arterial signalization and level of service on measured vehicle emissions

In Energy, air quality, and fuels 2003 (pp. 47โ€“56). Washington, DC: Transportation Research Board.

By: A. Unal, N. Rouphail & H. Frey

Source: NC State University Libraries
Added: August 6, 2018

2003 journal article

Effect of arterial signalization and level of service on measured vehicle emissions

Transportation Research Record, (1842), 47โ€“56. http://www.scopus.com/inward/record.url?eid=2-s2.0-1542316140&partnerID=MN8TOARS

By: A. Unal, N. Rouphail & C. Freyโ€‰

Contributors: A. Unal

Source: ORCID
Added: April 26, 2019

2003 journal article

Methods for quantifying variability and uncertainty in AP-42 emission factors: Case studies for natural gas-fueled engines

JOURNAL OF THE AIR & WASTE MANAGEMENT ASSOCIATION, 53(12), 1436โ€“1447.

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ

Contributors: H. Freyโ€‰ n

MeSH headings : Air Pollutants / analysis; Fossil Fuels; Models, Theoretical; Motor Vehicles; Reproducibility of Results; Vehicle Emissions / analysis
Sources: Web Of Science, ORCID
Added: August 6, 2018

2003 journal article

On-road measurement of vehicle tailpipe emissions using a portable instrument

JOURNAL OF THE AIR & WASTE MANAGEMENT ASSOCIATION, 53(8), 992โ€“1002.

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ

Contributors: H. Freyโ€‰ n

MeSH headings : Air Pollutants / analysis; Automobiles; Environmental Monitoring / instrumentation; Public Policy; Reproducibility of Results; Sensitivity and Specificity; Transportation; Vehicle Emissions / analysis
Sources: Web Of Science, ORCID
Added: August 6, 2018

2003 journal article

Probabilistic nonroad mobile source emission factors

Journal of Environmental Engineering, 129(2), 162โ€“168.

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ

Contributors: H. Freyโ€‰ n

Sources: NC State University Libraries, ORCID
Added: August 6, 2018

2003 journal article

Quantification of hourly variability in NOx emissions for baseload coal-fired power plants

JOURNAL OF THE AIR & WASTE MANAGEMENT ASSOCIATION, 53(11), 1401โ€“1411.

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ

Contributors: A. Abdel-Aziz n

MeSH headings : Air Pollutants / analysis; Coal; Decision Making; Environmental Monitoring / methods; Forecasting; Kinetics; Models, Theoretical; Nitrogen Oxides / analysis; Power Plants
Sources: Web Of Science, ORCID
Added: August 6, 2018

2002 journal article

Identification and review of sensitivity analysis methods

Risk Analysis, 22(3), 553โ€“578.

By: H. Frey & S. Patil*

Contributors: H. Frey

Sources: NC State University Libraries, ORCID
Added: August 6, 2018

2002 journal article

Introduction to special section on sensitivity analysis and summary of NCSU/USDA workshop on sensitivity analysis

RISK ANALYSIS, 22(3), 539โ€“545.

By: H. Frey

Contributors: H. Frey

author keywords: sensitivity analysis; food safety uncertainty; variability modeling
MeSH headings : Food Contamination / statistics & numerical data; Risk Assessment; Safety; Sensitivity and Specificity; United States; United States Department of Agriculture
Sources: Web Of Science, ORCID
Added: August 6, 2018

2002 journal article

Probabilistic analysis of driving cycle-based highway vehicle emission factors

ENVIRONMENTAL SCIENCE & TECHNOLOGY, 36(23), 5184โ€“5191.

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ

Contributors: H. Freyโ€‰ n

MeSH headings : Air Pollutants / analysis; Atmospheric Pressure; Automobile Driving; Carbon Monoxide / analysis; Forecasting; Hydrocarbons / analysis; Models, Statistical; Nitrogen Oxides / analysis; Regression Analysis; Temperature; Vehicle Emissions / analysis
Sources: Web Of Science, ORCID
Added: August 6, 2018

2002 journal article

Quantification of variability and uncertainty in air pollutant emission inventories: Method and case study for utility NOx emissions

JOURNAL OF THE AIR & WASTE MANAGEMENT ASSOCIATION, 52(9), 1083โ€“1095.

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ

Contributors: H. Freyโ€‰ n

MeSH headings : Air Pollutants / analysis; Cost Savings; Environment; Environmental Monitoring / economics; Environmental Monitoring / standards; Nitrogen Oxides / analysis; Policy Making; Reproducibility of Results; Sensitivity and Specificity; Vehicle Emissions / analysis
Sources: Web Of Science, ORCID
Added: August 6, 2018

2002 journal article

Quantification of variability and uncertainty in lawn and garden equipment NOx and total hydrocarbon emission factors

JOURNAL OF THE AIR & WASTE MANAGEMENT ASSOCIATION, 52(4), 435โ€“448.

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ

Contributors: H. Freyโ€‰ n

MeSH headings : Air Pollutants, Occupational / analysis; Air Pollution / analysis; Air Pollution / prevention & control; Databases, Factual; Hydrocarbons / analysis; Nitrogen Oxides / analysis; Reproducibility of Results; Vehicle Emissions / analysis
Sources: Web Of Science, ORCID
Added: August 6, 2018

2001 journal article

Uncertainties in predicted ozone concentrations due to input uncertainties for the UAM-V photochemical grid model applied to the July 1995 OTAG domain

ATMOSPHERIC ENVIRONMENT, 35(5), 891โ€“903.

By: . Hanna*, Z. Lu*, H. Freyโ€‰ n, N. Wheeler n, J. Vukovich*, S. Arunachalamโ€‰*, M. Fernau, D. Hansen*

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ

Contributors: S. Hanna*

author keywords: photochemical modeling; model uncertainty; Monte Carlo uncertainty methods
Sources: Web Of Science, ORCID
Added: August 6, 2018

1999 journal article

Methods for characterizing variability and uncertainty: Comparison of bootstrap simulation and likelihood-based approaches

Risk Analysis, 19(1), 109โ€“130.

By: H. Freyโ€‰ n & D. Burmaster*

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ
Sources: NC State University Libraries, ORCID
Added: August 6, 2018

1999 journal article

Methods for characterizing variability and uncertainty: Comparison of bootstrap simulation and likelihood-based approaches

Risk Analysis, 19(1), 109โ€“130.

By: H. Frey & D. Burmaster

Contributors: H. Frey

author keywords: variability; uncertainty; maximum likelihood; bootstrap simulation; Monte Carlo simulation
Source: ORCID
Added: April 26, 2019

1998 journal article

Characterization and simulation of uncertain frequency distributions: Effects of distribution choice, variability, uncertainty, and parameter dependence

HUMAN AND ECOLOGICAL RISK ASSESSMENT, 4(2), 423โ€“468.

By: H. Freyโ€‰ n & D. Rhodes n

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ
author keywords: variability; uncertainty; bootstrap; Monte Carlo; distributions
Sources: Web Of Science, ORCID
Added: August 6, 2018

1998 conference paper

Desktop modeling of the performance, emissions, and cost of gasification systems

Proceedings of the Air & Waste Management Association's, 91th Annual Meeting & Exhibition: San Diego, California, June 14-18, 1998, 91(1998 June). Pittsburgh, PA :; A & WMA.

By: H. Frey & R. Bharvirkar

Source: NC State University Libraries
Added: August 6, 2018

1998 journal article

Desktop modeling of the performance, emissions, and cost of gasification systems

Proceedings of the Air & Waste Management Association's Annual Meeting & Exhibition. http://www.scopus.com/inward/record.url?eid=2-s2.0-0032274276&partnerID=MN8TOARS

By: H. Frey & R. Bharvirkar

Contributors: H. Frey

Source: ORCID
Added: April 26, 2019

1998 conference paper

Methods for quantitative analysis of variability and uncertainty in hazardous air pollutant emissions

Proceedings of the Air & Waste Management Association's, 91th Annual Meeting & Exhibition: San Diego, California, June 14-18, 1998, 91(1998 June). Pittsburgh, PA :; A & WMA.

By: H. Frey

Source: NC State University Libraries
Added: August 6, 2018

1998 journal article

Methods for quantitative analysis of variability and uncertainty in hazardous air pollutant emissions

Proceedings of the Air & Waste Management Association's Annual Meeting & Exhibition. http://www.scopus.com/inward/record.url?eid=2-s2.0-18344405017&partnerID=MN8TOARS

By: H. Frey

Contributors: H. Frey

Source: ORCID
Added: April 26, 2019

1998 chapter

Quantitative analysis of variability and uncertainty in energy and environmental systems

In Uncertainty modeling and analysis in civil engineering (pp. 381โ€“423). Boca Raton: CRC Press.

By: H. Frey

Source: NC State University Libraries
Added: August 6, 2018

1997 journal article

Bootstrap methods for quantitative analysis of variability and uncertainty in exposure and risk assessment

Proceedings of the Air & Waste Management Association's Annual Meeting & Exhibition. http://www.scopus.com/inward/record.url?eid=2-s2.0-0031344095&partnerID=MN8TOARS

By: H. Frey

Contributors: H. Frey

Source: ORCID
Added: April 26, 2019

1997 journal article

Integrated environmental control modeling of coal-fired power systems

JOURNAL OF THE AIR & WASTE MANAGEMENT ASSOCIATION, 47(11), 1180โ€“1188.

By: E. Rubin*, . Kalagnanam*, H. Freyโ€‰ n & M. Berkenpas*

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ

Contributors: E. Rubin*

Sources: Web Of Science, ORCID
Added: August 6, 2018

1997 conference paper

Methods for characterizing and managing technological risks in advanced power generation systems: Application to gasification repowering in Poland

Proceedings of Gasification Technologies Conference, Electric Power Research lnstitute, Palo Alto, CA. October 1997, (1997 Oct.).

By: H. Frey & Z. Iwanski

Source: NC State University Libraries
Added: August 6, 2018

1997 journal article

Modeling and evaluation of externally fired combined cycle using ASPEN

Journal of Energy Engineering, 123(3), 69โ€“87.

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ
Sources: NC State University Libraries, ORCID
Added: August 6, 2018

1997 journal article

Modeling and evaluation of externally fired combined cycle using ASPEN

Journal of Energy Engineering, 123(3), 69โ€“86. http://www.scopus.com/inward/record.url?eid=2-s2.0-6144248166&partnerID=MN8TOARS

By: P. Agrawal & H. Frey

Contributors: P. Agrawal

Source: ORCID
Added: April 26, 2019

1997 article

Optimal design of advanced power systems under uncertainty

ENERGY CONVERSION AND MANAGEMENT, Vol. 38, pp. 1725โ€“1735.

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ
author keywords: process optimization; process synthesis; uncertainty; energy systems; environmental control technology
Source: Web Of Science
Added: August 6, 2018

1997 journal article

Optimal design of advanced power systems under uncertainty

Energy Conversion and Management, 38(15-17), 1725โ€“1735. http://www.scopus.com/inward/record.url?eid=2-s2.0-0031259174&partnerID=MN8TOARS

By: U. Diwekar, E. Rubin & H. Frey

Contributors: U. Diwekar

Source: ORCID
Added: April 26, 2019

1997 book

Probabilistic evaluation of mobile source air pollution. Volume I, Probabilistic modeling of exhaust emissions from light duty gasoline vehicles

Raleigh, NC: North Carolina State University for Center for Transportation and the Environment.

By: M. Kini & H. Frey

Source: NC State University Libraries
Added: August 6, 2018

1997 conference paper

Probabilistic methodology for risk assessment of new energy technologies and application to gasification repowering for an oil refinery in Poland

In G. Manfrida & N. Lior (Eds.), Florence World Energy Research Symposium (1997): FLOWERS ''97: Florence World Energy Symposium (Vol. 39, pp. 267โ€“274). Padova, Italy: SGEditorial.

By: H. Frey & Z. Iwanski

Ed(s): . G. Manfrida & N. Lior

Source: NC State University Libraries
Added: August 6, 2018

1997 journal article

Quantification of uncertainty in remotesensing-based school bus CO and hydrocarbon emission factors

Proceedings of the Air & Waste Management Association's Annual Meeting & Exhibition. http://www.scopus.com/inward/record.url?eid=2-s2.0-0031354445&partnerID=MN8TOARS

By: H. Frey

Contributors: H. Frey

Source: ORCID
Added: April 26, 2019

1997 conference paper

Quantification of variability and uncertainty in AP-42 emission factors using bootstrap simulation

Emission inventory: Planning for the future, proceedings of a specialty conference, October 28-30, 1997, Research Triangle Park, NC, (1997 Oct.). Pittsburgh, Pa.: Air & Waste Management Association.

By: D. Rhodes & H. Frey

Source: NC State University Libraries
Added: August 6, 2018

1997 chapter

Uncertainty evaluation in capital cost projection

In Encyclopedia of chemical processing and design, Vol. 59 (Vol. 59, pp. 480โ€“494). New York: Marcel Dekker.

By: H. Frey & E. Rubin

Source: NC State University Libraries
Added: August 6, 2018

1997 conference paper

Variability and uncertainty in highway vehicle emission factors

Emission inventory: Planning for the future, proceedings of a specialty conference, October 28-30, 1997, Research Triangle Park, NC, (1997 Oct.). Pittsburgh, Pa.: Air & Waste Management Association.

By: H. Frey

Source: NC State University Libraries
Added: August 6, 2018

1996 journal article

Characterizing, simulating, and analyzing variability and uncertainty: An illustration of methods using an air toxics emissions example

Human and Ecological Risk Assessment (HERA), 2(4), 762โ€“797. http://www.scopus.com/inward/record.url?eid=2-s2.0-21444446390&partnerID=MN8TOARS

By: H. Frey & D. Rhodes

Contributors: H. Frey

Source: ORCID
Added: April 26, 2019

1996 journal article

Methods for evaluating the costs of utility NOx control technologies

Proceedings of the Air & Waste Management Association's Annual Meeting & Exhibition. http://www.scopus.com/inward/record.url?eid=2-s2.0-0030315356&partnerID=MN8TOARS

By: L. Tran & H. Frey

Contributors: L. Tran

Source: ORCID
Added: April 26, 2019

1996 journal article

Optimization of environmental control system design for an IGCC power plant

Proceedings of the American Power Conference, 1, 58โ€“63. http://www.scopus.com/inward/record.url?eid=2-s2.0-0029706671&partnerID=MN8TOARS

By: U. Diwekar, E. Rubin & H. Frey

Contributors: U. Diwekar

Source: ORCID
Added: April 26, 2019

1996 journal article

Probabilistic analysis and optimization of new power generation technologies: a case study for the externally-fired combined cycle

Proceedings of the American Power Conference, 1, 52โ€“57. http://www.scopus.com/inward/record.url?eid=2-s2.0-0029707721&partnerID=MN8TOARS

By: H. Frey & P. Agarwal

Contributors: H. Frey

Source: ORCID
Added: April 26, 2019

1996 journal article

Probabilistic modeling and optimization of clean coal technologies: case studies of the externally-fired combined cycle

Proceedings of the Air & Waste Management Association's Annual Meeting & Exhibition. http://www.scopus.com/inward/record.url?eid=2-s2.0-0030314477&partnerID=MN8TOARS

By: H. Frey & P. Agarwal

Contributors: H. Frey

Source: ORCID
Added: April 26, 2019

1996 journal article

Uncertainty, bias, and variability in emission factors for light duty gasoline vehicles

Proceedings of the Air & Waste Management Association's Annual Meeting & Exhibition. http://www.scopus.com/inward/record.url?eid=2-s2.0-17544390686&partnerID=MN8TOARS

By: H. Frey, M. Kini, S. Ranjithan & S. Fu

Contributors: H. Frey

Source: ORCID
Added: April 26, 2019

1995 journal article

Coal blending optimization under uncertainty

European Journal of Operational Research, 83(3), 452โ€“465. http://www.scopus.com/inward/record.url?eid=2-s2.0-0029328154&partnerID=MN8TOARS

By: J. Shih & H. Frey

Contributors: J. Shih

Source: ORCID
Added: April 26, 2019

1995 journal article

Engineering-economic evaluation of SCR NOx control systems for coal-fired power plants

Proceedings of the American Power Conference, 57-2, 1583โ€“1588. http://www.scopus.com/inward/record.url?eid=2-s2.0-0029232725&partnerID=MN8TOARS

By: H. Frey

Contributors: H. Frey

Source: ORCID
Added: April 26, 2019

1994 journal article

Modeling uncertainties in advanced technologies: Application to a coal gasification system with hot-gas cleanup

Energy, 19(4), 449โ€“463. http://www.scopus.com/inward/record.url?eid=2-s2.0-0028413599&partnerID=MN8TOARS

By: H. Frey, E. Rubin & U. Diwekar

Contributors: H. Frey

Source: ORCID
Added: April 26, 2019

1992 journal article

Evaluate uncertainties in advanced process technologies

Chemical Engineering Progress, 88(5), 63โ€“70. http://www.scopus.com/inward/record.url?eid=2-s2.0-0026855415&partnerID=MN8TOARS

By: H. Frey & E. Rubin

Contributors: H. Frey

Source: ORCID
Added: April 26, 2019

1992 journal article

Evaluation method for advanced acid rain compliance technology

Journal of Energy Engineering, 118(1), 38โ€“55. http://www.scopus.com/inward/record.url?eid=2-s2.0-0026853964&partnerID=MN8TOARS

By: H. Frey & E. Rubin

Contributors: H. Frey

Source: ORCID
Added: April 26, 2019

1992 journal article

Evaluation of advanced coal gasification combined-cycle systems under uncertainty

Industrial and Engineering Chemistry Research, 31(5), 1299โ€“1307. http://www.scopus.com/inward/record.url?eid=2-s2.0-0026868636&partnerID=MN8TOARS

By: C. Freyโ€‰ & E. Rubin

Contributors: C. Freyโ€‰

Source: ORCID
Added: April 26, 2019

1992 journal article

Synthesizing optimal flowsheets. Applications to IGCC system environmental control

Industrial and Engineering Chemistry Research, 31(8), 1927โ€“1936. http://www.scopus.com/inward/record.url?eid=2-s2.0-0026906174&partnerID=MN8TOARS

By: U. Diwekar, C. Freyโ€‰ & E. Rubin

Contributors: U. Diwekar

Source: ORCID
Added: April 26, 2019

1991 journal article

Evaluating advanced technologies for acid rain compliance

Energy in the 90's, 172โ€“178. http://www.scopus.com/inward/record.url?eid=2-s2.0-0025843790&partnerID=MN8TOARS

By: H. Frey & E. Rubin

Contributors: H. Frey

Source: ORCID
Added: April 26, 2019

1991 journal article

Probabilistic evaluation of advanced SO2/NO(x) control technology

Journal of the Air and Waste Management Association, 41(12), 1585โ€“1593. http://www.scopus.com/inward/record.url?eid=2-s2.0-0026329024&partnerID=MN8TOARS

By: H. Frey & E. Rubin

Contributors: H. Frey

Source: ORCID
Added: April 26, 2019

1991 journal article

Probabilistic modeling of the performance and economics of IGCC systems

American Society of Mechanical Engineers, Environmental Control Division Publication, EC, 2, 59โ€“66. http://www.scopus.com/inward/record.url?eid=2-s2.0-0026400326&partnerID=MN8TOARS

By: E. Rubin, H. Frey & U. Diwekar

Contributors: E. Rubin

Source: ORCID
Added: April 26, 2019

Employment

Updated: July 3rd, 2022 18:54

North Carolina State University Raleigh, NC, US
Distinguished University Professor Civil, Construction, and Environmental Engineering

2022 - present

U.S. Environmental Protection Agency Washington, D.C., US
Assistant Administrator Office of Research and Development

Education

Updated: January 2nd, 2015 20:10

Carnegie Mellon University Pittsburgh, PA, US
PhD Engineering and Public Policy