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Optimization By Varied Beam Search In Hopfield Networks, Tony R. Martinez, Xinchuan Zeng May 2002

Optimization By Varied Beam Search In Hopfield Networks, Tony R. Martinez, Xinchuan Zeng

Faculty Publications

This paper shows that the performance of the Hopfield network for solving optimization problems can be improved by a varied beam search algorithm. The algorithm varies the beam search size and beam intensity during the network relaxation process. It consists of two stages: increasing the beam search parameters in the flrst stage and then decreasing them in the second stage. The purpose of using such a scheme is to provide the network with a better chance to find more and better solutions. A large number of simulation results based on 200 randomly generated city distributions of the 10-city traveling salesman …

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Laurasian Migration Explains Gondwanan Disjunctions: Evidence From Malpighiaceae, Charles C. Davis, Charles D. Bell, Sarah Mathews, Michael J. Donoghue May 2002

Laurasian Migration Explains Gondwanan Disjunctions: Evidence From Malpighiaceae, Charles C. Davis, Charles D. Bell, Sarah Mathews, Michael J. Donoghue

Faculty Publications

Explanations for biogeographic disjunctions involving South America and Africa typically invoke vicariance of western Gondwanan biotas or long distance dispersal. These hypotheses are problematical because many groups originated and diversified well after the last known connection between Africa and South America (≈105 million years ago), and it is unlikely that "sweepstakes" dispersal accounts for many of these disjunctions. Phylogenetic analyses of the angiosperm clade Malpighiaceae, combined with fossil evidence and molecular divergence-time estimates, suggest an alternative hypothesis to account for such distributions. We propose that Malpighiaceae originated in northern South America, and that members of several clades repeatedly migrated into …

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Geochemistry Of Atmospheric Aerosols Generated From Lava-Seawater Interactions, Francis J. Sansone, Claudia R. Benitez-Nelson, Joseph A. Resing, Eric H. Decarlo, Sue M. Vink, Jacqueline A. Heath, Barry J. Huebert May 2002

Geochemistry Of Atmospheric Aerosols Generated From Lava-Seawater Interactions, Francis J. Sansone, Claudia R. Benitez-Nelson, Joseph A. Resing, Eric H. Decarlo, Sue M. Vink, Jacqueline A. Heath, Barry J. Huebert

Faculty Publications

[1] Trace elements were measured in the aerosol plume produced by lava‐seawater interactions along the shoreline of Kilauea volcano, Hawaii. Plume concentrations were normalized relative to Hawaiian basalt composition and showed a linear log‐log co‐variation with their emanation coefficient (an indicator of element volatility). Normalized aerosol concentrations also consistently covaried with corresponding normalized concentrations in dilute fumarolic gas from Kilauea volcano and fumarolic gas condensates from Kudryavy and Merapi volcanoes, despite different mechanisms of element volatilization. Conservatively estimated regional ocean deposition rates of Cu, Cd, Ni, Pb, Mn, Zn, Fe and P were >50 times background rates. Thus, upper ocean …

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Seasonal Niche Strategy Of The Bloom-Forming Dinoflagellate Heterocapsa Triquetra, R. W. Litaker, P. A. Tester, C. S. Duke, B. E. Kenney, James L. Pinckney, J. Ramus May 2002

Seasonal Niche Strategy Of The Bloom-Forming Dinoflagellate Heterocapsa Triquetra, R. W. Litaker, P. A. Tester, C. S. Duke, B. E. Kenney, James L. Pinckney, J. Ramus

Faculty Publications

Heterocapsa triquetra is one of the most common bloom-forming dinoflagellates found in estuaries and near shore regions around the world. This work examined the environmental factors associated with 3 separate wintertime H. triquetra blooms in the shallow tidally mixed Newport River estuary, North Carolina, USA. During 2 of the blooms in 1982 and 1983, the estuary was sampled from a fixed, single location every hour for 14 d. During the third study, the estuary was sampled at 9 fixed locations over its entire length each week from late December 1997 through March 1998. This time period included the formation and …

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Estimating The Spatial Extent Of Bottom-Water Hypoxia And Habitat Degradation In A Shallow Estuary, Christopher P. Buzzelli, Richard A. Luettich Jr., Sean P. Powers, Charles H. Peterson, Jesse E. Mcninch, James L. Pinckney, Hans W. Paerl Apr 2002

Estimating The Spatial Extent Of Bottom-Water Hypoxia And Habitat Degradation In A Shallow Estuary, Christopher P. Buzzelli, Richard A. Luettich Jr., Sean P. Powers, Charles H. Peterson, Jesse E. Mcninch, James L. Pinckney, Hans W. Paerl

Faculty Publications

Bottom-water hypoxia (≤ 2 mg 1-1 dissolved oxygen [DO]) greatly modifies the benthic habitat of estuaries, depending upon spatial extent, duration, and frequency. Bottom-water hypoxia often develops under conditions of density stratification, which inhibits vertical mixing, and warm temperatures, which enhance biological oxygen demand. Long-term, mid-channel data from the Neuse River Estuary in North Carolina permitted evaluation of how stratification and temperature combined to affect DO concentrations at the bottom. Salinity stratification (DS) and water temperature (T) explained respectively 30 and 23% of the variance in bottom-water DO concentrations. The amount of salinity stratification required to induce bottom-water …

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Survey Of Research On Learning Styles, Rita Dunn, Jeffrey Beaudry Phd, Angela Klavas Apr 2002

Survey Of Research On Learning Styles, Rita Dunn, Jeffrey Beaudry Phd, Angela Klavas

Faculty Publications

A number of studies conducted during the last decade have found that students’ achievement increases when teaching methods match their learning styles—biological and developmental characteristics that affect how they learn.

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Habeas Review Of Perfunctory State Court Decisions On The Merits, Scott Dodson Apr 2002

Habeas Review Of Perfunctory State Court Decisions On The Merits, Scott Dodson

Faculty Publications

This article discusses the appropriate standard of review a federal habeas court should use to review a state-court determination of federal law unaccompanied by a federally-based rationale. In other words, what standard of review does the federal court employ when the state court’s opinion is wholly composed of the phrases: “The claims are without merit. Denied.”? The Supreme Court has not explicitly resolved the issue, and various federal judges around the country have reached different opinions. This article argues that a close scrutiny of the controlling habeas corpus statute, relevant case law, and policy considerations leads to the conclusion that …

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"Do You Have Any Books On..." An Examination Of Public Library Holdings, Cynthia Bassett, John M. Budd Mar 2002

"Do You Have Any Books On..." An Examination Of Public Library Holdings, Cynthia Bassett, John M. Budd

Faculty Publications

Public librarians have long debated the question of whether quality or popularity should drive collection decisions. A survey of the selected holdings of twenty medium-sized public libraries indicates that both quality and popularity may be determining factors in whether to acquire particular titles. Furthermore, the study suggests that the existence and content of reviews may also influence the likelihood of libraries to select particular titles, as may the selectors' perception of the diversity of their community.

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How Do Disciplines Grow?, Anita Coleman Mar 2002

How Do Disciplines Grow?, Anita Coleman

Faculty Publications

No abstract provided.

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Two Splice Variants Of Nopp140 In Drosophila Melanogaster, John M. Waggener, Patrick J. Dimario Feb 2002

Two Splice Variants Of Nopp140 In Drosophila Melanogaster, John M. Waggener, Patrick J. Dimario

Faculty Publications

The Nopp140 gene of Drosophila maps within 79A5 of chromosome 3. Alternative splicing yields two variants. DmNopp140 (654 residues) is the sequence homolog of vertebrate Nopp140. Its carboxy terminus is 64% identical to that of the prototypical rat Noppl40. DmNopp140-RGG (688 residues) is identical to DmNopp140 throughout its first 551 residues, but its carboxy terminus contains a glycine/arginine-rich domain that is often found in RNA-binding proteins such as vertebrate nucleolin. Both Drosophila variants localize to nucleoli in Drosophila Schneider II cells and Xenopus oocytes, specifically within the dense fibrillar components. In HeLa cells, DmNopp140-RGG localizes to intact nucleoli, whereas DmNopp140 …

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Interferon-Γ-Mediated Activation And Ubiquitin-Proteasome-Dependent Degradation Of Pparγ In Adipocytes, Z. Elizabeth Floyd, Jacqueline M. Stephens Feb 2002

Interferon-Γ-Mediated Activation And Ubiquitin-Proteasome-Dependent Degradation Of Pparγ In Adipocytes, Z. Elizabeth Floyd, Jacqueline M. Stephens

Faculty Publications

Interferon-γ (IFNγ) treatment of adipocytes results in a down-regulation of the peroxisome proliferator-activated receptor γ (PPARγ). The decrease in PPARγ expression is mediated by inhibition of PPARγ synthesis and increased degradation of PPARγ. In this study, we demonstrate that both PPARγ1 and PPARγ2 are targeted to the proteasome under basal conditions and that PPARγ1 is more labile than PPARγ2. The IFNγ-induced increase in PPARγ turnover is blocked by proteasome inhibition and is accompanied by an increase in PPARγ-polyubiquitin conjugates. In addition, IFNγ treatment results in the transcriptional activation of PPARγ. Similar to ligand-dependent activation of PPARγ, IFNγ-induced activation was greater …

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Multi-Center Genetic Study Of Hypertension: The Family Blood Pressure Program (Fbpp), Eric Boerwinkle, C. Andrew Brown, Maurita Carrejo, Robert Ferrell, Craig Hanis, Richard Hutchinson, Sharon Kardia, Charles Sing, Stephen Turner, Alan Weder, Aravinda Chakravarti, Richard Cooper, Howard Jacob, Nicholas Schork., Steven Hunt, Donna Arnett, Ingrid Borecki, John Eckfeldt, R. Curtis Ellison, Chi Gu, Gerardo Heiss, Mark Leppert, Albert Oberman, Michael Province, D. C. Rao, David Cox, J. David Curb, Ida Chen, John Grove, Kamal Masaki, Tom Quertermous, Koustubh Ranade, Neil Risch Feb 2002

Multi-Center Genetic Study Of Hypertension: The Family Blood Pressure Program (Fbpp), Eric Boerwinkle, C. Andrew Brown, Maurita Carrejo, Robert Ferrell, Craig Hanis, Richard Hutchinson, Sharon Kardia, Charles Sing, Stephen Turner, Alan Weder, Aravinda Chakravarti, Richard Cooper, Howard Jacob, Nicholas Schork., Steven Hunt, Donna Arnett, Ingrid Borecki, John Eckfeldt, R. Curtis Ellison, Chi Gu, Gerardo Heiss, Mark Leppert, Albert Oberman, Michael Province, D. C. Rao, David Cox, J. David Curb, Ida Chen, John Grove, Kamal Masaki, Tom Quertermous, Koustubh Ranade, Neil Risch

Faculty Publications

The Family Blood Pressure Program (FBPP) consists of 4 independently established multicenter networks of investigators who have complementary approaches to the genetics of blood pressure levels and hypertension. The program has recruited participants from the African American, Mexican American, Asian, and non-Hispanic white populations. Each network utilized study designs, laboratory measurements, and analytic methods that made efficient use of the unique characteristics of their populations and the investigators expertise. The individual networks subsequently unified core study components into a single cohesive program. The unified FBPP includes (1) standardized clinic and laboratory protocols for core variables to facilitate direct comparison of …

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A Post-Amadori Inhibitor Pyridoxamine Also Inhibits Chemical Modification Of Proteins By Scavenging Carbonyl Intermediates Of Carbohydrate And Lipid Degradation, Paul A. Voziyan, Thomas O. Metz, John W. Baynes, Billy G. Hudson Feb 2002

A Post-Amadori Inhibitor Pyridoxamine Also Inhibits Chemical Modification Of Proteins By Scavenging Carbonyl Intermediates Of Carbohydrate And Lipid Degradation, Paul A. Voziyan, Thomas O. Metz, John W. Baynes, Billy G. Hudson

Faculty Publications

Reactive carbonyl compounds are formed during autoxidation of carbohydrates and peroxidation of lipids. These compounds are intermediates in the formation of advanced glycation end products (AGE) and advanced lipoxidation end products (ALE) in tissue proteins during aging and in chronic disease. We studied the reaction of carbonyl compounds glyoxal (GO) and glycolaldehyde (GLA) with pyridoxamine (PM), a potent post-Amadori inhibitor of AGE formation in vitro and of development of renal and retinal pathology in diabetic animals. PM reacted rapidly with GO and GLA in neutral, aqueous buffer, forming a Schiff base intermediate that cyclized to a hemiaminal adduct by intramolecular …

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Correlates Of Vigorous Physical Activity For Children In Grades 1 Through 12: Comparing Parent-Reported And Objectively Measured Physical Activity, James F. Sallis, Wendell C. Taylor, Marsha Dowda, Patty S. Freedson, Russell R. Pate Feb 2002

Correlates Of Vigorous Physical Activity For Children In Grades 1 Through 12: Comparing Parent-Reported And Objectively Measured Physical Activity, James F. Sallis, Wendell C. Taylor, Marsha Dowda, Patty S. Freedson, Russell R. Pate

Faculty Publications

Correlates of physical activity were examined in young people in grades 1 through 12, and analyses were conducted separately for eight age/grade and sex subgroups. Twenty-one explanatory variables were assessed by parental report. Physical activity was assessed in 781 young people via parent report, and 200 wore an accelerometer for seven days. Between 11% and 36% of parent-reported child vigorous physical activity was explained. The most consistent correlates were peer support and use of afternoon time for active rather than sedentary recreation. Peer support was the only significant correlate of objectively monitored activity in multiple subgroups.

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Thin Laser Light Sheet Microscope For Microbial Oceanography, Eran Fuchs, Jules S. Jaffe, Richard A. Long, Farooq Azam Jan 2002

Thin Laser Light Sheet Microscope For Microbial Oceanography, Eran Fuchs, Jules S. Jaffe, Richard A. Long, Farooq Azam

Faculty Publications

Despite a growing need, oceanographers are limited by existing technological constrains and are unable to observe aquatic microbes in their natural setting. In order to provide a simple and easy to implement solution for such studies, a new Thin Light Sheet Microscope (TLSM) has been developed. The TLSM utilizes a well-defined sheet of laser light, which has a narrow (23 micron) axial dimension over a 1 mm x 1 mm field of view. This light sheet is positioned precisely within the depth of field of the microscope’s objective lens. The technique thus utilizes conventional microscope optics but replaces the illumination …

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Global Expression Profiling Of Acetate-Grown Escherichia Coli, Min-Kyu Oh, Lars Rohlin, Katy Kao, James Liao Jan 2002

Global Expression Profiling Of Acetate-Grown Escherichia Coli, Min-Kyu Oh, Lars Rohlin, Katy Kao, James Liao

Faculty Publications

This study characterized the transcript profile of Escherichia coli in acetate cultures using DNA microarray on glass slides. Glucose-grown cultures were used as a reference. At the 95% confidence level, 354 genes were up-regulated in acetate, while 370 genes were down-regulated compared with the glucose-grown culture. Generally, more metabolic genes were up-regulated in acetate than other gene groups, while genes involved in cell replication, transcription, and translation machinery tended to be down-regulated. It appears that E. coli commits more resources to metabolism at the expense of growth when cultured in the poor carbon source. The expression profile confirms many known …

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The Genome Sequence Of The Facultative Intracellular Pathogen Brucella Melitensis, Vito G. Delvecchio, Vinayak Kapatral, Rajendra J. Redkar, Guy Patra, Cesar Mujer, Tamara Los, Natalia Ivanova, Iain Anderson, Anamitra Bhattacharyya, Athanasios Lykidis, Gary Reznik, Lynn Jablonski, Niels Larsen, Mark D'Souza, Axel Bernal, Mikhail Mazur, Eugene Goltsman, Eugene Selkov, Philip H. Elzer, Sue Hagius, David O'Callaghan, Jean Jacques Letesson, Robert Haselkorn, Nikos Kyrpides, Ross Overbeek Jan 2002

The Genome Sequence Of The Facultative Intracellular Pathogen Brucella Melitensis, Vito G. Delvecchio, Vinayak Kapatral, Rajendra J. Redkar, Guy Patra, Cesar Mujer, Tamara Los, Natalia Ivanova, Iain Anderson, Anamitra Bhattacharyya, Athanasios Lykidis, Gary Reznik, Lynn Jablonski, Niels Larsen, Mark D'Souza, Axel Bernal, Mikhail Mazur, Eugene Goltsman, Eugene Selkov, Philip H. Elzer, Sue Hagius, David O'Callaghan, Jean Jacques Letesson, Robert Haselkorn, Nikos Kyrpides, Ross Overbeek

Faculty Publications

Brucella melitensis is a facultative intracellular bacterial pathogen that causes abortion in goats and sheep and Malta fever in humans. The genome of B. melitensis strain 16M was sequenced and found to contain 3,294,935 bp distributed over two circular chromosomes of 2,117,144 bp and 1,177,787 bp encoding 3,197 ORFs. By using the bioinformatics suite ERGO, 2,487 (78%) ORFs were assigned functions. The origins of replication of the two chromosomes are similar to those of other α-proteobacteria. Housekeeping genes, including those involved in DNA replication, transcription, translation, core metabolism, and cell wall biosynthesis, are distributed on both chromosomes. Type I, II, …

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Red-Cockaded Woodpecker Foraging Behavior In Relation To Midstory Vegetation, D. Craig Rudolph, Richard N. Conner, Richard R. Schaefer Jan 2002

Red-Cockaded Woodpecker Foraging Behavior In Relation To Midstory Vegetation, D. Craig Rudolph, Richard N. Conner, Richard R. Schaefer

Faculty Publications

Red-cockaded Woodpeckers (Picoides borealis) nest and forage in pine-dominated forests. Research indicates that substantial hardwood midstory encroachment is detrimental to Red-cockaded Woodpecker populations, although the exact mechanisms are unknown. We examined foraging behavior in relation to midstory between August 1989 and February 1990. Red-cockaded Woodpeckers foraged at greater heights in areas of taller and denser midstory in the loblolly-shortleaf pine (Pinus taeda and P. echinata, respectively) habitat, but not in longleaf pine (P. palustris) habitat with less-developed midstory vegetation than typical of loblolly-shortleaf pine habitat. In addition, Red-cockaded Woodpeckers concentrated foraging activities in or adjacent to forest stands or openings …

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Are Pileated Woodpeckers Attracted To Red-Cockaded Woodpecker Cavity Trees?, Richard N. Conner, Daniel Saenz, James R. Mccormick Jan 2002

Are Pileated Woodpeckers Attracted To Red-Cockaded Woodpecker Cavity Trees?, Richard N. Conner, Daniel Saenz, James R. Mccormick

Faculty Publications

Pileated Woodpeckers (Dryocopus pileatus) cause damage to Red-cockaded Woodpecker (Picoides borealis) cavity trees in the form of cavity enlargement or other excavations on the surface of the pine tree. However, it is not known whether Pileated Woodpeckers excavate more frequently on Red-cockaded Woodpecker cavity trees than on noncavity trees or how stand structure is related to the frequency of Pileated Woodpecker excavation. Also, it is unclear whether the cavity itself provides the stimulus to Pileated Woodpeckers to excavate or whether the presence of Red-cockaded Woodpeckers and their activities are attracting them. We surveyed all of the …

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Prey Handling And Diet Of Louisiana Pine Snakes (Pituophis Ruthveni) And Black Pine Snakes (P. Melanoleucus Lodingi), With Comparisons To Other Selected Colubrid Snakes, D. Craig Rudolph, Shirley J. Burgdorf, Richard N. Conner, Christopher S. Collins, Daniel Saenz, Richard R. Schaefer, Toni Trees, C. Michael Duran, Marc Ealy, John G. Himes Jan 2002

Prey Handling And Diet Of Louisiana Pine Snakes (Pituophis Ruthveni) And Black Pine Snakes (P. Melanoleucus Lodingi), With Comparisons To Other Selected Colubrid Snakes, D. Craig Rudolph, Shirley J. Burgdorf, Richard N. Conner, Christopher S. Collins, Daniel Saenz, Richard R. Schaefer, Toni Trees, C. Michael Duran, Marc Ealy, John G. Himes

Faculty Publications

Diet and prey handling behavior were determined for Louisiana pine snakes (Pituophis ruthveni) and black pine snakes (P. melanoleucus lodingi). Louisiana pine snakes prey heavily on Baird's pocket gophers (Geomys breviceps), with which they are sympatric, and exhibit specialized behaviors that facilitate handling this prey species within the confines of burrow systems. Black pine snakes, which are not sympatric with pocket gophers, did not exhibit these specialized behaviors. For comparative purposes, prey handling of P. sayi sayi and Elaphe obsoleta lindheimeri was also examined.

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An Automated Technique For Monitoring Nocturnal Avian Vocalizations., Brent Burt, James B. Johnson, Daniel Saenz, Richard N. Conner Jan 2002

An Automated Technique For Monitoring Nocturnal Avian Vocalizations., Brent Burt, James B. Johnson, Daniel Saenz, Richard N. Conner

Faculty Publications

Using audio recording dataloggers, we collected nocturnal bird vocalizations at different sites within the Davy Crockett National Forest and the Stephen F. Austin Experimental Forest. We detected vocalizations of a variety of nocturnal and diurnal species. This technology is useful for its application to avifauna.

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The Constitutional Implications Of A Cloning Society, Elizabeth Price Foley Jan 2002

The Constitutional Implications Of A Cloning Society, Elizabeth Price Foley

Faculty Publications

This paper examines the social and legal implications of human cloning.

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Human Cloning & The Right To Reproduce, Elizabeth Price Foley Jan 2002

Human Cloning & The Right To Reproduce, Elizabeth Price Foley

Faculty Publications

Explores the contours of the right to reproduce, recognized as a substantive liberty under the Due Process Clauses. Specifically, is the right a positive as well as negative right? Does the right encompass the right to use artificial reproductive technologies (ARTs) such as in vitro fertilization, artificial insemination, or reproductive cloning?

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Recent Applications Of Flame Atomic Absorption Spectrometry To Environmental Measurements, Michael A. Janusa Jan 2002

Recent Applications Of Flame Atomic Absorption Spectrometry To Environmental Measurements, Michael A. Janusa

Faculty Publications

Atomic absorption spectroscopy is very useful for the determination of a large number of elements, especially at trace levels. It is a widely used technique for analysis of a wide variety of sample matrices including biota, soils, and water. Atomic absorption spectroscopy is a very reputable technique that is inexpensive and delivers accurate results even in a complex matrix. This review focuses on the applications of flame atomic absorption spectroscopy to environmental measurements, and is mainly based on papers published from 1999–2002.

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The Stephen F. Austin Experimental Forest, Cary C. Russell, Ronald E. Thill, David Kulhavy Jan 2002

The Stephen F. Austin Experimental Forest, Cary C. Russell, Ronald E. Thill, David Kulhavy

Faculty Publications

On December 14, 1944, the Seventy-Eighth United States Congress passed a bill that authorized the transfer of 2,560 acres in Nacogdoches County, Texas, to the research branch of the United States Forest Service (USFS). This land became the Stephen F. Austin Experimental Forest (SFAEF) on September 19. 1945. One of eighty-one federal experimental forests and ranges nationally, it is the only one of its kind in Texas. Located seven miles west of Nacogdoches, three quarters of the Forest consists of bottomland hardwood forests along the Angelina River and the remainder of mixed pine and hardwood uplands.

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Soil Leachate Responses During 10 Years Of Induced Whole-Watershed Acidification, Pamela J. Edwards, James N. Kochenderfer, Dean W. Coble, Mary Beth Adams Jan 2002

Soil Leachate Responses During 10 Years Of Induced Whole-Watershed Acidification, Pamela J. Edwards, James N. Kochenderfer, Dean W. Coble, Mary Beth Adams

Faculty Publications

Soil solution was collected from zero-tension lysimeters for 10 yr on two small central Appalachian watersheds in West Virginia, U.S.A. Ammonium sulfate fertilizer was applied to one catchment 3 times per year during each year. The other watershed was used as a reference to account for ambient baseline conditions. Ca and Mg concentrations collected below the A- and B-horizons of the treated watershed increased and then decreased over time as a result of the treatment. By contrast, Ca and Mg concentrations in the C-horizon continued to increase throughout the study period.

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Preliminary Results: Effects Of Fertilization, Herbicide Application, And Prescribed Burning On Understory Regeneration On Pine Plantations In East Texas, Betsy Ott, Brian Oswald, Hans Williams, Kenneth Farrish Jan 2002

Preliminary Results: Effects Of Fertilization, Herbicide Application, And Prescribed Burning On Understory Regeneration On Pine Plantations In East Texas, Betsy Ott, Brian Oswald, Hans Williams, Kenneth Farrish

Faculty Publications

Biodiversity and species rareness are increasingly the focal points for assessment of habitat quality. Managed pine plantations are often viewed as monocultures with little of value beyond their timber crop. The purpose of this study is to assess vegetative biodiversity in the understory of two pine plantations in which different vegetative control mechanisms are being evaluated. Controlled burn, herbicide treatment, and a combination of both are being compared on fertilized and unfertilized plots on two loblolly pine (Pinus taeda) plantations in east Texas. This study will compare species diversity and frequency on untreated and treated plots. One-square meter …

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Growth Reponse Of Loblolly Pine To Intermediate Treatment Of Fire, Herbicide, And Fertilizer: Preliminary Results, L. M. Marino, B. P. Oswald, K. W. Farrish, H. M. Williams, Daniel R. Unger Jan 2002

Growth Reponse Of Loblolly Pine To Intermediate Treatment Of Fire, Herbicide, And Fertilizer: Preliminary Results, L. M. Marino, B. P. Oswald, K. W. Farrish, H. M. Williams, Daniel R. Unger

Faculty Publications

Crown area is an important factor in determining stem development. This study examined the changes in stem diameter per unit area of crown due to treatment with fire, herbicide, fertilizer, and tree-thinning practice. The experimental sites were mid-rotation loblolly pine (Pinus taeda) plantations that were thinned one year before treatment. Site 1 was strictly row-thinned and Site 2 was thinned by and within each row. Five replicates were installed on each site. Each replicate consisted of 8 subplots (0.1 ha) containing a central 0.04 ha measurement plot. A randomized-block split-plot design was used at each site, with fertilizer …

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Effects Of Midrotation Intensive Silviculture On Forest Soils In East Texas: First-Year Results, S. A. Wilson, K. W. Farrish, B. P. Oswald, H. M. Williams, J. L. Yeiser Jan 2002

Effects Of Midrotation Intensive Silviculture On Forest Soils In East Texas: First-Year Results, S. A. Wilson, K. W. Farrish, B. P. Oswald, H. M. Williams, J. L. Yeiser

Faculty Publications

Intensive forest management is becoming increasingly common in east Texas. Included in intensive management are such practices as mid-rotation fertilization, prescribed fire, and herbicide application. There is insufficient information about the effects of these treatments on soil physical, chemical, and biological properties when applied at mid-rotation. The objectives of this research are to evaluate the effects of these treatments on soil physical properties including organic matter content and bulk density; chemical properties including soil nitrogen and phosphorus; and on populations of resident earthworms. Five replications were installed in each of two loblolly pine (Pinus taeda L.) plantations aged 15 …

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Movement Patterns Of Resident And Relocated Northern Bobwhites In East Texas, Xiangwen Liu, R. Montague Whiting Jr., D. Scott Parsons, Donald R. Dietz Jan 2002

Movement Patterns Of Resident And Relocated Northern Bobwhites In East Texas, Xiangwen Liu, R. Montague Whiting Jr., D. Scott Parsons, Donald R. Dietz

Faculty Publications

We compared home range sizes and movement patterns of resident and relocated northern bobwhites (Colinus virginianus) on an area managed specifically for the species in the Pineywoods of east Texas. During the winters of 1990–1992, 155 south Texas, 136 east Texas, and 139 resident bobwhites were radiomarked, released, and thereafter regularly located. Bird locations were plotted on a digitized map, and home range sizes and movement patterns of each group of birds were estimated. Resident bobwhites moved longer daily distances in March and had larger home ranges during the nesting season (May-Jul) than relocated birds (P0.05). Managers that elect to …

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