IPCC Technical Guidelines for Assessing Climate Change Impacts and Adaptations

IPCC Technical Guidelines for Assessing Climate Change Impacts and Adaptations

Date: 1994
Creator: Intergovernmental Panel on Climate Change
Description: This guideline provides a means for assessing the impacts of potential climate change and of evaluating appropriate adaptations.
Contributing Partner: UNT Libraries
Incorporation of 3D Shortwave Radiative Effects within the Weather Research and Forecasting Model

Incorporation of 3D Shortwave Radiative Effects within the Weather Research and Forecasting Model

Date: March 18, 2005
Creator: O'Hirok, W.; Ricchiazzi, P. & Gautier, C.
Description: A principal goal of the Atmospheric Radiation Measurement (ARM) Program is to understand the 3D cloud-radiation problem from scales ranging from the local to the size of global climate model (GCM) grid squares. For climate models using typical cloud overlap schemes, 3D radiative effects are minimal for all but the most complicated cloud fields. However, with the introduction of ''superparameterization'' methods, where sub-grid cloud processes are accounted for by embedding high resolution 2D cloud system resolving models within a GCM grid cell, the impact of 3D radiative effects on the local scale becomes increasingly relevant (Randall et al. 2003). In a recent study, we examined this issue by comparing the heating rates produced from a 3D and 1D shortwave radiative transfer model for a variety of radar derived cloud fields (O'Hirok and Gautier 2005). As demonstrated in Figure 1, the heating rate differences for a large convective field can be significant where 3D effects produce areas o f intense local heating. This finding, however, does not address the more important question of whether 3D radiative effects can alter the dynamics and structure of a cloud field. To investigate that issue we have incorporated a 3D radiative transfer algorithm into the ...
Contributing Partner: UNT Libraries Government Documents Department
Geographic Distribution of HIV/AIDS in Texas

Geographic Distribution of HIV/AIDS in Texas

Date: December 1, 2011
Creator: Oppong, Joseph R.
Description: This presentation is part of the faculty lecture series UNT Speaks Out on HIV/AIDS. This presentation discusses the geographic distribution of HIV/AIDS in Texas and the associated factors.
Contributing Partner: UNT College of Arts and Sciences
The Epidemiology of HIV/AIDS in Texas in Ages 25-49 (1999-2010) [Presentation]

The Epidemiology of HIV/AIDS in Texas in Ages 25-49 (1999-2010) [Presentation]

Date: April 14, 2011
Creator: Rodriguez, Jonathan & Oppong, Joseph R.
Description: Presentation for the 2011 University Scholars Day at the University of North Texas discussing the epidemiology of HIV/AIDS in Texas in ages 25-49 from 1999 to 2010.
Contributing Partner: UNT Honors College
Pediatric and Maternal HIV in Texas Border Counties and Urban Area

Pediatric and Maternal HIV in Texas Border Counties and Urban Area

Date: April 14, 2011
Creator: Ho, Jessie & Oppong, Joseph R.
Description: Presentation for the 2011 University Scholars Day at the University of North Texas discussing research on pediatric and maternal HIV in Texas border counties and urban areas.
Contributing Partner: UNT Honors College
Geography of Cerebrovascular Disease in Texas (CVD) [Presentation]

Geography of Cerebrovascular Disease in Texas (CVD) [Presentation]

Date: April 3, 2008
Creator: Feltus, Chris & Oppong, Joseph R.
Description: Presentation for the 2008 University Scholars Day at the University of North Texas discussing research on the spatial distribution of CVD mortality rates in Texas counties from 1999-2003.
Contributing Partner: UNT Honors College
Tuberculosis Among Hispanics of Tarrant County, Texas

Tuberculosis Among Hispanics of Tarrant County, Texas

Date: April 2, 2009
Creator: Huddleston, Jody S. & Oppong, Joseph R.
Description: Presentation for the 2009 University Scholars Day at the University of North Texas discussing research on tuberculosis (TB) rates among Hispanics in Tarrant County, Texas.
Contributing Partner: UNT Honors College
Hydrogeology Lessons and Exercises for Introductory Physical-Geology Students

Hydrogeology Lessons and Exercises for Introductory Physical-Geology Students

Date: 1996
Creator: Hudak, Paul F.
Description: This article describes the creation of instruction models for an undergraduate physical-geology course.
Contributing Partner: UNT College of Arts and Sciences
The Geography of HIV in Dallas County, Texas, 1999-2003

The Geography of HIV in Dallas County, Texas, 1999-2003

Date: March 30, 2006
Creator: Enwright, Nicholas & Oppong, Joseph R.
Description: This paper discusses research on the geography of HIV in Dallas County, Texas from 1999 to 2003.
Contributing Partner: UNT Honors College
The Geography of Cerebrovascular Disease in Texas

The Geography of Cerebrovascular Disease in Texas

Date: April 3, 2008
Creator: Feltus, Chris & Oppong, Joseph R.
Description: This paper discusses research on the geography of cerebrovascular disease (CVD) in Texas.
Contributing Partner: UNT Honors College
Diurnal evapotranspiration estimates in the Walnut River Watershed.

Diurnal evapotranspiration estimates in the Walnut River Watershed.

Date: October 5, 1998
Creator: Song, J.
Description: Evapotranspiration is an essential component of the surface hydrological balance, but obtaining accurate estimates of the water vapor flux over large terrestrial areas can be difficult because of the substantial temporal and spatial variability in surface moisture conditions that can occur. This variability is often very large in the Great Plains and other portions of the Mississippi River Basin. Nevertheless, variations in soil moisture content, groundwater levels, and runoff in streams and rivers cannot be fully assessed without some knowledge of evapotranspiration rates. Here, observations made at the Walnut River Watershed (WRW), which is near Wichita, Kansas, and has an area of approximately 5000 km{sup 2}, are used to improve and test a modeling system that estimates long-term evapotranspiration with use of satellite remote sensing data with limited surface measurements. The techniques may be applied to much larger areas. As is shown in Fig. 1, the WRW is located in the Red River Basin and is enclosed by the southern Great Plains Clouds and Radiation Testbed (CART) of the US Department of Energy's Atmospheric Radiation Measurement (ARM) program. The functional relationships involving the satellite data, surface parameters, and associated subgrid-scale fluxes are modeled in this study by the parameterization of ...
Contributing Partner: UNT Libraries Government Documents Department
Inference of extractable soil moisture in the plant root zone at the Walnut River Watershed.

Inference of extractable soil moisture in the plant root zone at the Walnut River Watershed.

Date: October 5, 1998
Creator: Song, J.
Description: Soil moisture content is a crucial variable in studies of hydrology, meteorology, and plant sciences. Soil moisture content influences the ability of land to hold additional water from precipitation and thus affects groundwater levels and runoff. Evapotranspiration rates are strongly influenced by soil moisture content near the surface; evapotranspiration regulates surface air temperature and is a major factor in modifying the water vapor content of the atmosphere. Adequate soil moisture is essential for plant growth; excesses and deficits of soil moisture must be considered in agricultural management practices. Soil moisture can be measured by a variety of in situ techniques, but such techniques often are inadequate for evaluation over large areas because of strong temporal and spatial variations. Here, a technique using standard surface meteorological observations together with remote sensing data from satellites is discussed.
Contributing Partner: UNT Libraries Government Documents Department
A Graben in the Eagle Ford Shale, Lewisville, Texas

A Graben in the Eagle Ford Shale, Lewisville, Texas

Date: April 1999
Creator: Hudak, Paul F.
Description: This article describes a graben bounded by normal faults in an outcrop of the Eagle Ford formation within Denton County.
Contributing Partner: UNT College of Arts and Sciences
The Epidemiology of HIV/AIDS in Texas in Ages 25-49 (1999-2010)

The Epidemiology of HIV/AIDS in Texas in Ages 25-49 (1999-2010)

Date: April 14, 2011
Creator: Rodriguez, Jonathan & Oppong, Joseph R.
Description: This paper discusses research on the epidemiology of HIV/AIDS in Texas in ages 25-49.
Contributing Partner: UNT Honors College
Lignite Deposits and Kidney and Renal Pelvic Cancers in Texas 1980-1998

Lignite Deposits and Kidney and Renal Pelvic Cancers in Texas 1980-1998

Date: April 3, 2008
Creator: Guthrey, Harvey & Oppong, Joseph R.
Description: This paper discusses research on lignite deposits and kidney and renal pelvic cancers in Texas from 1980 to 1998. This study also probes the role of such factors as race, gender, and socioeconomic status on mortality rates for these cancers.
Contributing Partner: UNT Honors College
Worldwide Historical Estimates of Leaf Area Index, 1932-2000

Worldwide Historical Estimates of Leaf Area Index, 1932-2000

Date: February 6, 2002
Creator: Scurlock, JMO
Description: Approximately 1000 published estimates of leaf area index (LAI) from nearly 400 unique field sites, covering the period 1932-2000, have been compiled into a single data set. LA1 is a key parameter for global and regional models of biosphere/atmosphere exchange of carbon dioxide, water vapor, and other materials. It also plays an integral role in determining the energy balance of the land surface. This data set provides a benchmark of typical values and ranges of LA1 for a variety of biomes and land cover types, in support of model development and validation of satellite-derived remote sensing estimates of LA1 and other vegetation parameters. The LA1 data are linked to a bibliography of over 300 original source references. These historic LA1 data are mostly from natural and seminatural (managed) ecosystems, although some agricultural estimates are also included. Although methodologies for determining LA1 have changed over the decades, it is useful to represent the inconsistencies (e.g., in maximum value reported for a particular biome) that are actually found in the scientific literature. Needleleaf (coniferous) forests are by far the most commonly measured biome/land cover types in this compilation, with 22% of the measurements from temperate evergreen needleleaf forests, and boreal evergreen needleleaf ...
Contributing Partner: UNT Libraries Government Documents Department
Estimating root-zone moisture and evapotranspiration with AVHRR data[Advanced Very High Resolution Radiometer]

Estimating root-zone moisture and evapotranspiration with AVHRR data[Advanced Very High Resolution Radiometer]

Date: October 8, 1999
Creator: Song, J. & Wesely, M. L.
Description: The parameterized subgrid-scale surface fluxes (PASS) model uses satellite data and limited surface observations to infer root-zone available moisture content and evapotranspiration rate with moderate spatial resolution over extended terrestrial areas. The ultimate goal of this work is to produce estimates of water loss by evapotranspiration, for application in hydrological models. The major advantage to the method is that it can be applied to areas having diverse surface characteristics where direct surface flux measurements either do not exist or are not feasible and where meteorological data are available from only a limited number of ground stations. The emphasis of this work with the PASS model is on improving (1) methods of using satellite remote sensing data to derive the essential parameters for individual types of surfaces over large areas, (2) algorithms for describing the interactions of near-surface atmospheric conditions with surface processes, and (3) algorithms for computing surface energy and water vapor flux at a scale close to the size of a satellite-derived image pixel. The PASS approach is being developed and tested further with observations from the 1997 Cooperative Atmosphere-Surface Exchange Study (CASES-97) at the Atmospheric Boundary Layer Experiments (ABLE) site in the Walnut River Watershed (WRW), an area ...
Contributing Partner: UNT Libraries Government Documents Department
The Geography of Viral Hepatitis C in Texas, 1992-1999

The Geography of Viral Hepatitis C in Texas, 1992-1999

Date: March 3, 2006
Creator: Hedrich, Mara & Oppong, Joseph R.
Description: This paper discusses research on the geography of viral hepatitis C in Texas from 1992-1999. This study examines the relationship between viral hepatitis C (HCV), race, gender, and population density in Texas counties.
Contributing Partner: UNT Honors College
Oil Production and Groundwater Quality in the Edwards-Trinity Plateau Aquifer, Texas

Oil Production and Groundwater Quality in the Edwards-Trinity Plateau Aquifer, Texas

Date: November 12, 2003
Creator: Hudak, Paul F.
Description: This article suggests that evaporite dissolution and oilfield brine locally impact the Edwards-Trinity Plateau Aquifer, but the problem is not regionally pervasive.
Contributing Partner: UNT College of Arts and Sciences
Retreating Glaciers of the Himalayas: A Case Study of Gangotri Glacier Using 1990-2009 Satellite Images

Retreating Glaciers of the Himalayas: A Case Study of Gangotri Glacier Using 1990-2009 Satellite Images

Date: April 15, 2010
Creator: Ding, Jennifer & Dong, Pinliang
Description: Presentation for the 2010 University Scholars Day at the University of North Texas discussing retreating glaciers of the Himalayas and a case study of the Gangotri Glacier using 1990-2009 satellite images.
Contributing Partner: UNT Honors College
Geophysical Prospecting for Oil and Gas Well Effluent

Geophysical Prospecting for Oil and Gas Well Effluent

Date: December 1997
Creator: Hudak, Paul F. & Maxey, George
Description: This article describes the evaluation of the utility of an earth resistivity system for detecting drilling effluent at a site in the Trinity Group outcrop zone.
Contributing Partner: UNT College of Arts and Sciences
Lightning, Downed Power Line Form Intriguing Rock Structure in Denton, Texas

Lightning, Downed Power Line Form Intriguing Rock Structure in Denton, Texas

Date: March 2003
Creator: Hudak, Paul F. & Maxey, George
Description: This article describes a vitrified soil structure, formed by atmospheric and human activity, possessing characteristics of igneous and metamorphic rocks.
Contributing Partner: UNT College of Arts and Sciences
Gracias a La Nacionalización De Los Hidrocarburos: a Critical Analysis of Bolivia’s Transition to Compressed Natural Gas

Gracias a La Nacionalización De Los Hidrocarburos: a Critical Analysis of Bolivia’s Transition to Compressed Natural Gas

Date: May 2015
Creator: McCollum, Jerl Levi
Description: This paper critically analyzes the implementation of compressed natural gas and the ways in which it creates discourse in urban Bolivia. The rapidly developing nation is keen on making ubiquitous use of compressed natural gas a reality by issuing subsidies, citing increased mobility, savings, and environmental stewardship as the primary motives. Currently, eight out of every 10 public vehicles in Bolivia are powered by compressed natural gas. Through semi-structured interviews, questionnaires and secondary data collection, this paper elucidates the transitional process of building a natural gas-based transport network through discursive governance. This work draws on the critical discourse analysis literature to dissect disaggregated modal preference data, government documents, and news articles collected in Santa Cruz, Latin America's second fastest growing city. Moreover, this paper identifies and examines the ways in which the counter-discourse impacts the transformation of the country’s energy matrix. Results show that Bolivian automobile owners are reluctant to convert their automobiles, despite reduced transportation costs, stating that minimal compressed natural gas infrastructure exists outside of urban areas, and the conversion damages their vehicles’ motor. Additionally, the research reveals that automobile owners are currently the main beneficiaries, though respondents who do not posses an automobile speak more favorably of ...
Contributing Partner: UNT Libraries
A machine learning approach to automated construction of knowledge bases for expert systems for remote sensing image analysis with GIS data

A machine learning approach to automated construction of knowledge bases for expert systems for remote sensing image analysis with GIS data

Date: December 31, 1995
Creator: Huang, X.; Jensen, J.R. & Mackey, H.E. Jr.
Description: Knowledge-based remote sensing image analysis with GIS data is acknowledged as a promising technique. However, the difficulty in knowledge acquisition, a well-known bottleneck in building knowledge-based systems, impedes the adoption of this technique. Automating knowledge acquisition is therefore in demand. This paper presents a machine learning approach to automated construction of knowledge bases for image analysis expert systems integrating remotely sensed and GIS data. The methodology applied in the study is based on inductive learning techniques in machine learning, a subarea of artificial intelligence. It involves training with examples from remote sensing and GIS data, learning using the inductive principles, decision tree generating, rule generating from the decision tree, and knowledge base building for an image analysis expert system. This method was used to construct a knowledge base for wetland classification of Par Pond on the Savannah River Site, SC, using SPOT image data and GIS data. The preliminary results show that this method can provide an effective approach to integration of remotely sensed and GIS data in geographic information processing.
Contributing Partner: UNT Libraries Government Documents Department
FIRST PREV 1 2 3 4 5 NEXT LAST