Search Results - "Henry, Ronald C."

Three Years of High Time-resolution Air Pollution Monitoring in the Complex Multi-source Harbor of New York and New Jersey by Hagler, Gayle, Birkett, Dan, Henry, Ronald C, Peltier, Richard E

“…In densely developed port areas with numerous emissions sources, relating measured air quality changes to emissions is challenging given the geographic density…”
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Source apportionment of polycyclic aromatic hydrocarbons (PAHs) in small craft harbor (SCH) surficial sediments in Nova Scotia, Canada by Davis, Emily, Walker, Tony R., Adams, Michelle, Willis, Rob, Norris, Gary A., Henry, Ronald C.

“…Multiple source apportionment approaches were employed to investigate PAH sources which contribute to small craft harbor (SCH) sediments in Nova Scotia (NS),…”
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Identifying the impact of large urban airports on local air quality by nonparametric regression by Yu, K.N, Cheung, Y.P, Cheung, T, Henry, Ronald C

“…Emissions of air pollutants from aircraft in large urban areas are a health concern to nearby residents. This study examined hourly concentrations of CO, NO x…”
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Workgroup Report: Workshop on Source Apportionment of Particulate Matter Health Effects-Intercomparison of Results and Implications by Thurston, George D., Ito, Kazuhiko, Mar, Therese, Christensen, William F., Eatough, Delbert J., Henry, Ronald C., Kim, Eugene, Laden, Francine, Lall, Ramona, Larson, Timothy V., Liu, Hao, Neas, Lucas, Pinto, Joseph, Stölzel, Matthias, Suh, Helen, Hopke, Philip K.

“…Although the association between exposure to ambient fine particulate matter with aerodynamic diameter < 2.5 μm ( PM2.5) and human mortality is well…”
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PM source apportionment and health effects: 2. An investigation of intermethod variability in associations between source-apportioned fine particle mass and daily mortality in Washington, DC by Ito, Kazuhiko, Christensen, William F, Eatough, Delbert J, Henry, Ronald C, Kim, Eugene, Laden, Francine, Lall, Ramona, Larson, Timothy V, Neas, Lucas, Hopke, Philip K, Thurston, George D

“…Source apportionment may be useful in epidemiological investigation of PM health effects, but variations and options in these methods leave uncertainties. An…”
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PM source apportionment and health effects. 3. Investigation of inter-method variations in associations between estimated source contributions of PM2.5 and daily mortality in Phoenix, AZ by Mar, Therese F, Ito, Kazuhiko, Koenig, Jane Q, Larson, Timothy V, Eatough, Delbert J, Henry, Ronald C, Kim, Eugene, Laden, Francine, Lall, Ramona, Neas, Lucas, Stölzel, Matthias, Paatero, Pentti, Hopke, Philip K, Thurston, George D

“…As part of an EPA-sponsored workshop to investigate the use of source apportionment in health effects analyses, the associations between the participant's…”
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Unmix Optimum analysis of PAH sediment sources by Norris, Gary A., Henry, Ronald C.

“…Unmix Optimum (UnmixO) was developed to analyze data, such as sediment PAH data, that were resistant to existing methods of multivariate analysis. Using a…”
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Response to letter on “Unmix Optimum Analysis of PAH Sediment Sources” by Norris, Gary A., Henry, Ronald C.

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Selecting an Appropriate Multivariate Source Apportionment Model Result by Henry, Ronald C, Christensen, Erik R

“…Two easily available multivariate source apportionment models, Unmix and positive matrix factorization (PMF), often produce nearly the same source…”
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A new expert system with diagnostic accuracy for pediatric upper respiratory conditions by Yazdani, Shahram, Lerner, Carlos, Kulkarni, Deepa, Kamzan, Audrey, Henry, Ronald C.

“…The high prevalence of pediatric upper respiratory conditions combined with poor availability of specialized care for the proper diagnosis of these diseases…”
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Separating the Air Quality Impact of a Major Highway and Nearby Sources by Nonparametric Trajectory Analysis by Henry, Ronald C, Vette, Alan, Norris, Gary, Vedantham, Ram, Kimbrough, Sue, Shores, Richard C

“…Nonparametric Trajectory Analysis (NTA), a receptor-oriented model, was used to assess the impact of local sources of air pollution at monitoring sites located…”
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Locating and quantifying the impact of local sources of air pollution by Henry, Ronald C.

“…A new hybrid receptor model is described, which uses 1-min observations of pollutant concentrations along with back trajectories to estimate the average…”
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Duality in multivariate receptor models by Henry, Ronald C.

“…Multivariate receptor models are used for source apportionment of multiple observations of compositional data of air pollutants that obey mass conservation…”
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History and fundamentals of multivariate air quality receptor models by Henry, Ronald C

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PM source apportionment and health effects: 1. Intercomparison of source apportionment results by Hopke, Philip K, Ito, Kazuhiko, Mar, Therese, Christensen, William F, Eatough, Delbert J, Henry, Ronald C, Kim, Eugene, Laden, Francine, Lall, Ramona, Larson, Timothy V, Liu, Hao, Neas, Lucas, Pinto, Joseph, Stölzel, Matthias, Suh, Helen, Paatero, Pentti, Thurston, George D

“…During the past three decades, receptor models have been used to identify and apportion ambient concentrations to sources. A number of groups are employing…”
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Bilinear estimation of pollution source profiles and amounts by using multivariate receptor models by Sug Park, Eun, Spiegelman, Clifford H., Henry, Ronald C.

“…Multivariate receptor models aim to identify the pollution sources based on multivariate air pollution data. This article is concerned with estimation of the…”
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A field study of visual perception of complex natural targets through atmospheric haze by naïve observers by Henry, Ronald C.

“…An air quality–visibility perception study was carried out in southern California in July and August of 2002. The study was designed to make simultaneous…”
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Multivariate receptor models—current practice and future trends by Henry, Ronald C

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Reported Emissions of Organic Gases are not Consistent with Observations by Henry, Ronald C., Spiegelman, Clifford H., Collins, John F., Park, EunSug

“…Regulatory agencies and photochemical models of ozone rely on self-reported industrial emission rates of organic gases. Incorrect self-reported emissions can…”
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Source Apportionment of Phoenix PM2.5 Aerosol with the Unmix Receptor Model by Lewis, Charles W., Norris, Gary A., Conner, Teri L., Henry, Ronald C.

“…The multivariate receptor model Unmix has been used to analyze a 3-yr PM 2.5 ambient aerosol data set collected in Phoenix, AZ, beginning in 1995. The analysis…”
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