scholarly journals Examination of the Predictability of Nocturnal Tornado Events in the Southeastern United States

2019 ◽  
Vol 34 (2) ◽  
pp. 467-479 ◽  
Author(s):  
Ryan C. Bunker ◽  
Ariel E. Cohen ◽  
John A. Hart ◽  
Alan E. Gerard ◽  
Kim E. Klockow-McClain ◽  
...  
Keyword(s):  
United States ◽  
Predictive Power ◽  
Meteorological Parameters ◽  
Southeastern United States ◽  
Time Frame ◽  
Assessment Model ◽  
The Other ◽  
Risk Assessment Model ◽  
Multiple Parameters ◽  
Effective Layer

Abstract Tornadoes that occur at night pose particularly dangerous societal risks, and these risks are amplified across the southeastern United States. The purpose of this study is to highlight some of the characteristics distinguishing the convective environment accompanying these events. This is accomplished by building upon previous research that assesses the predictive power of meteorological parameters. In particular, this study uses the Statistical Severe Convective Risk Assessment Model (SSCRAM) to determine how well convective parameters explain tornado potential across the Southeast during the months of November–May and during the 0300–1200 UTC (nocturnal) time frame. This study compares conditional tornado probabilities across the Southeast during November–May nocturnal hours to those probabilities for all other November–May environments across the contiguous United States. This study shows that effective bulk shear, effective storm-relative helicity, and effective-layer significant tornado parameter yield the strongest predictability for the November–May nocturnal Southeast regime among investigated parameters. This study demonstrates that November–May southeastern U.S. nocturnal predictability is generally similar to that within other regimes across the contiguous United States. However, selected ranges of multiple parameters are associated with slightly better predictability for the nocturnal Southeast regime. Additionally, this study assesses conditional November–May nocturnal tornado probabilities across a coastal domain embedded within the Southeast. Nocturnal coastal tornado predictability is shown to generally be lower than the other regimes. All of the differences highlight several forecast challenges, which this study analyzes in detail.

Growth and Development of Wild Poinsettia (Euphorbia heterophylla) Selections in Peanut (Arachis hypogaea)

Weed Science ◽  
1996 ◽  
Vol 44 (3) ◽  
pp. 575-578 ◽  
Author(s):  
Barry J. Brecke ◽  
Piotr Tobola
Keyword(s):  
United States ◽  
Leaf Area ◽  
Growth And Development ◽  
Baton Rouge ◽  
Southeastern United States ◽  
Light Attenuation ◽  
Growing Season ◽  
The Other ◽  
Yield Reduction ◽  
Dry Biomass

Wild poinsettia is a serious weed in several crops, including peanut, grown in the southeastern United States. A study was conducted over 3 yr at Jay, FL, to characterize the growth and development of wild poinsettia grown from seed collected at Plains, GA; Marianna, FL; and Baton Rouge, LA. Seedlings from each selection were transplanted to the field and were grown either alone or in competition with peanut. Observations made throughout the growing season indicated that the Louisiana selection flowered later, grew to a larger size, produced more leaf area and biomass, and caused greater light attenuation and peanut yield reduction than the other two selections. The Georgia selection produced the smallest plants, least leaf area and biomass, and was least competitive with peanut. The Florida selection was intermediate for these parameters. Wild poinsettia dry biomass production was reduced by 78 to 83% when grown with peanut compared with monoculture wild poinsettia.

scholarly journals Performance of North American Strawberry Cultivars under Conditions Mimicking California Production Systems

1994 ◽  
Vol 119 (5) ◽  
pp. 1034-1038 ◽  
Author(s):  
John M. Rariden ◽  
Douglas V. Shaw
Keyword(s):  
United States ◽  
Variance Components ◽  
Production Systems ◽  
Southeastern United States ◽  
Total Yield ◽  
The Other ◽  
Phenotypic Variance ◽  
Growth Attributes ◽  
Geographic Regions ◽  
Strawberry Cultivars

Runner plants from 16 strawberry (Fragaria ×ananassa Duch.) cultivars were grown using annual Mediterranean production systems to test for differences in productivity, performance traits, and vegetative growth attributes. Genotypes were included from germplasm adapted to four geographic regions: California and northwestern, northeastern, and mid-Atlantic or southeastern United States. The California genotypes were divided further into day-neutral and June-bearing categories. With these treatments, California cultivars had significantly larger plants and grew more rapidly during the fall and winter, had larger fruit, and produced at least twice the quantity of fruit of cultivars from the other regions. Variance components due to region explained 64% and 26% of the phenotypic variance for early and total yield, respectively, whereas differences among cultivars within regions explained 12% and 7% of the variance for these traits. Cultivars from all regions had significantly larger plants and were more productive when treated with 3 weeks of artificial vernalization. However, region × vernalization effects were nonsignificant for all traits, a result suggesting that selection in Mediterranean environments has not adapted germplasm specifically for low vernalization conditions.

Scanning electron microscopy of three types of ectomycorrhizae formed on Eucalyptus nova-anglica in the southeastern United States

1981 ◽  
Vol 59 (5) ◽  
pp. 683-688 ◽  
Author(s):  
R. W. Rose Jr. ◽  
C. Gerald Van Dyke ◽  
C. B. Davey
Keyword(s):  
Electron Microscopy ◽  
United States ◽  
Scanning Electron Microscopy ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Southeastern United States ◽  
The Other ◽  
Cenococcum Geophilum ◽  
Different Types ◽  
Scanning Electron

Three different types of ectomycorrhizae found in the Southeastern United States on Eucalyptus nova-anglica and identified as being formed by Cenococcum geophilum, Pisolithus tinctorius, and Scleroderma geaster were examined with a scanning electron microscope (SEM). In overall appearance the three types of mycorrhizae could be distinguished easily from each other, particularly C. geophilum, which had a relatively smooth, undulate surface in comparison with the other two types. Detailed descriptions and comparisons of these ectomycorrhizae are given and the value of SEM in characterizing ectomycorrhizae is discussed

scholarly journals Quantitative Risk Assessment Model of Human Salmonellosis Resulting from Consumption of Broiler Chicken

Diseases ◽  
2019 ◽  
Vol 7 (1) ◽  
pp. 19 ◽  
Author(s):  
Luma Akil ◽  
H. Anwar Ahmad
Keyword(s):  
United States ◽  
Risk Assessment ◽  
Broiler Chicken ◽  
The United States ◽  
Assessment Model ◽  
Quantitative Risk Assessment ◽  
United States Department ◽  
Risk Assessment Model ◽  
Broiler Meat ◽  
Salmonella Infections

(1) Background: Salmonella infections are a major cause of illnesses in the United States. Each year around 450 people die from the disease and more than 23,000 people are hospitalized. Salmonella outbreaks are commonly associated with eggs, meat and poultry. In this study, a quantitative risk assessment model (QRAM) was developed to determine Salmonella infections in broiler chicken. (2) Methods: Data of positive Salmonella infections were obtained from the United States Department of Agriculture (USDA) and the Centers for Disease Control and Prevention (CDC) Foodborne Disease Outbreak Surveillance System, in addition to published literature. The Decision Tools @RISK add-in software was used for various analyses and to develop the QRAM. The farm-to-fork pathway was modeled as a series of unit operations and associated pathogen events that included initial contamination at the broiler house (node 1), contamination at the slaughter house (node 2), contamination at retail (node 3), cross-contamination during serving and cooking (node 4), and finally the dose–response model after consumption. (3) Results: QRAM of Salmonella infections from broiler meat showed highest contribution of infection from the retail node (33.5%). (4) Conclusions: This QRAM that predicts the risk of Salmonella infections could be used as a guiding tool to manage the Salmonella control programs

scholarly journals Reduced Midseason Pesticide Program for Control of Scab and Plum Curculio in Peach

Plant Disease ◽  
2003 ◽  
Vol 87 (6) ◽  
pp. 699-706 ◽  
Author(s):  
Z. Lan ◽  
H. Scherm ◽  
D. L. Horton
Keyword(s):  
United States ◽  
Southeastern United States ◽  
The Other ◽  
Application Time ◽  
Conotrachelus Nenuphar ◽  
Plum Curculio ◽  
Nontarget Effects ◽  
And Control ◽  
Preharvest Interval ◽  
Environmental Impact Quotient

Risks to peach production from scab (caused by Cladosporium carpophilum) and plum curculio (Conotrachelus nenuphar), two key pests in the southeastern United States, are high until 2 months past petal fall and then decreases during midseason. This suggests that reduced-input pesticide strategies may effectively control both pests during the latter period. In this study, we evaluated midseason pesticide applications according to an alternate-row middle (ARM) spray program in which sprays were applied only to every other tree row while reducing tractor speed and keeping application intervals unchanged relative to conventional spraying of both sides of the trees. In a 2-year trial in a research orchard, conventional sprays of fungicide (primarily sulfur) and insecticide (primarily phosmet) were applied at 10- to 14-day intervals until first cover, followed by continued conventional sprays of fungicide and insecticide (standard), conventional sprays of one pesticide together with ARM sprays of the other pesticide, or combined ARM sprays of both pesticides. Schedules with midseason ARM sprays of both pesticides also were evaluated in two commercial orchards in 2 years. In all experiments, plots receiving combined ARM sprays were equivalent to the standard in fruit quality and control of scab and plum curculio. Combined ARM spraying resulted in lower environmental nontarget effects (as estimated by the Environmental Impact Quotient) and reduced application time by 25 to 33% for each midseason spray and 12.5 to 18.5% for the entire period from petal fall to the preharvest interval.

scholarly journals Soiling Comparison of Mirror Film and Glass Concentrating Solar Power Reflectors in Southwest Louisiana

2021 ◽  
Vol 13 (10) ◽  
pp. 5727
Author(s):  
Kenneth Ritter Ritter ◽  
Albert McBride ◽  
Terrence Chambers
Keyword(s):  
Thin Film ◽  
United States ◽  
Solar Power ◽  
Specular Reflection ◽  
Southeastern United States ◽  
The Other ◽  
Concentrating Solar Power ◽  
Two Generations ◽  
Average Loss ◽  
Reflective Surfaces

Soiling effects influence the output of solar thermal plants, significantly causing unwanted transmittance, reflectance, and absorbance losses. Research is needed to identify what type of reflective surfaces are best suited for semitropical climates, such as the southeastern United States. This paper initially presents a review of several concentrating solar power (CSP) reflector testbeds used to analyze the soiling effects of various reflective materials. A soiling testbed is developed for this study that comprised six sets of reflective surfaces mounted at a fixed tilt of 30 degrees: three sets of thin-film surfaces and three sets of glass types. Two generations of 3M solar mirror film (SMF), 3M SMF 1100 and 3M SMF 2020, were used along with Konica Minolta SMF, silvered Corning Willow Glass, a dichroic cold mirror, and a standard mirror. Results show that the 3M SMF 2020 and Konica Minolta SMF performed the best during regular cleaning intervals, whereas the silvered Corning Willow Glass gave the best performance if only cleaned naturally. The other glass types showed the least average loss due to soiling throughout this study but gave the lowest performance for specular reflection.

scholarly journals Post-gay, Political, and Pieced Together: Queer Expectations of Straight Allies

2019 ◽  
Vol 63 (1) ◽  
pp. 159-176
Author(s):  
TehQuin D. Forbes ◽  
Koji Ueno
Keyword(s):  
United States ◽  
Social Change ◽  
Southeastern United States ◽  
Past Research ◽  
Public University ◽  
The Other ◽  
Personal Lives ◽  
Queer People ◽  
The Individual ◽  
Depth Interviews

Past research has examined straight allyship to the queer community from allies’ perspectives, but little is known about how queer people evaluate straight allies. Drawing on in-depth interviews with 20 LGBTQ+ (lesbian, gay, bisexual, transgender, and queer) students from a large, public university in the southeastern United States, we show that respondents formulate their expectations by leaning on their understanding of their own queerness in relation to other privileged and marginalized identities they possess. We find two opposing camps of thought: one that allies should be attuned to the individual needs of queer people in their personal lives, and the other that they should be actively dedicated to supporting the broader queer community. Some respondents expressed sentiments of both camps, showcasing how expectations range with diverse identity constellations. We conclude with discussions of how diverse expectations complicate allyship as a vehicle for social change, and the implications of these results for allies’ roles in queer rights movements.

Revision of the milliped genus Auturus (Polydesmida: Platyrhacidae)

1982 ◽  
Vol 60 (12) ◽  
pp. 3249-3267 ◽  
Author(s):  
Rowland M. Shelley
Keyword(s):  
United States ◽  
North Carolina ◽  
Mississippi River ◽  
Type Species ◽  
Southeastern United States ◽  
The Other ◽  
Valid Species ◽  
Nominal Species ◽  
Central United States ◽  
Separate Line

The milliped genus Auturus consists of the valid species evides (Bollman), mcclurkini Causey, louisianus (Chamberlin), and erythropygos (Brandt), the last two of which are divided into two subspecies each. The other four nominal species are relegated to appropriate synonymies. Auturus evides, louisianus, and mcclurkini occur in the central United States, along the Mississippi River from central Minnesota to the Gulf of Mexico. Auturus erythropygos is widely allopatric and occurs in the southeastern United States from northern North Carolina to northern Florida. The four species are anatomically similar, and all occur exclusively in association with moist, decaying hardwood logs or stumps. They can be distinguished only by details of the male gonopods, particularly the orientation of the terminal calyx and the position of the solenomerite within the calyx. Auturus evides, louisianus, and erythropygos are phenotypically similar and appear to be closely related; mcclurkini, however, possesses a number of unique characters and represents a separate line of descent. The genus Illiniums, recently synonymized with Auturus, is revived on the basis of published illustrations of its type species, I. beattyi Shear.

Variation in sex-linked interchange heterozygosity in the termite Incisitermes schwarzi Banks (Insecta: Isoptera) on the island of Jamaica

Genome ◽  
1987 ◽  
Vol 29 (2) ◽  
pp. 319-325 ◽  
Author(s):  
Peter Luykx
Keyword(s):  
United States ◽  
Key Words ◽  
Sex Chromosomes ◽  
Sex Chromosome ◽  
Southeastern United States ◽  
The Other ◽  
Sex Linkage ◽  
Y Chromosomes ◽  
The Family ◽  
A Chain

Collections of colonies of the termite Incisitermes schwarzi from mangroves around the coast of Jamaica revealed six chromosomal types, all involving variations or rearrangements of the sex chromosomes. One of the types had a heteromorphic sex bivalent in which the Y chromosome was larger than the X. The other five races had complex interchange multiples: a chain of 11, a chain of 12, a ring of 12, a ring of 14, and a ring of 18 chromosomes. The situation is similar to that described previously for Kalotermes approximatus, another member of the family Kalotermitidae, in the southeastern United States. The different chromosomal types can be arranged in an evolutionary series, each step requiring an interchange or fusion between an autosome and a previously existing sex chromosome. Such polymorphic chromosome systems, containing Y-segregating elements of different evolutionary ages, may offer an unusual opportunity for studying the sequence of changes accompanying the evolution of Y chromosomes. Key words: termite, Incisitermes, sex-linkage, translocation, interchange, Jamaica.

scholarly journals Genetic Diversity and Relatedness Among Cultivars of Stokes Aster

HortScience ◽  
2001 ◽  
Vol 36 (7) ◽  
pp. 1323-1326 ◽  
Author(s):  
Lyn A. Gettys ◽  
Dennis J. Werner
Keyword(s):  
United States ◽  
Genetic Diversity ◽  
Genetic Relatedness ◽  
Southeastern United States ◽  
The Other ◽  
Pairwise Comparisons ◽  
Monotypic Genus ◽  
Randomly Amplified Polymorphic Dna ◽  
Similarity Indices ◽  
Herbaceous Perennial

Stokes aster is a herbaceous perennial native to the southeastern United States. Stokesia is a monotypic genus belonging to the tribe Vernonieae Cass. (family Asteraceae Dumont). The level of genetic diversity within the genus is unknown. The goal of this study was to determine the level of genetic diversity and relatedness among cultivars of stokes aster. The genetic relatedness among 10 cultivars of stokes aster, one accession of Vernonia crinita Raf. (syn. V. arkansana DC.), and one accession of Rudbeckia fulgida Ait. var. sullivantii (Beadle et Boynton) Cronq. `Goldsturm' was estimated using 74 randomly amplified polymorphic DNA (RAPD) primers. Similarity indices suggest that cultivars of stokes aster are very closely related, with values for all pairwise comparisons of cultivars of stokes aster ranging from 0.92 to 0.68. One cultivar, `Omega Skyrocket', had markedly lower similarity indices from the other cultivars, ranging from 0.72 to 0.68. Similarity indices between stokes aster and Vernonia and between stokes aster and Rudbeckia were 0.44 and 0.50, respectively.

Sign in / Sign up

Export Citation Format

Share Document