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Articles 1 - 30 of 37
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Status And Distribution Of The Arkansas Darter (Etheostoma Cragini) In Arkansas, Brian K. Wagner, Mark D. Kottmyer
Status And Distribution Of The Arkansas Darter (Etheostoma Cragini) In Arkansas, Brian K. Wagner, Mark D. Kottmyer
Journal of the Arkansas Academy of Science
The Arkansas darter, Etheostoma cragini, has an extremely limited distribution in Arkansas and is designated as a andidate for listing under the Endangered Species Act. It was first discovered in the state in 1979 in Wilson Spring near Fayetteville and has since been found in4 additional headwater streams in Benton and Washington counties prior to this study. A study in 1997 (bund the species in3 of the 5 historic streams, but one stream yielded only a single individual. This study sought to reassess the status of the 5 historically known populations and sample additional spring-run habitats in the Arkansas River …
Distribution Of Arkansas's Bottomland Bats, Rex E. Medlin Jr., Stephen C. Brandebura, H. Bobby Fokidis, Thomas S. Risch
Distribution Of Arkansas's Bottomland Bats, Rex E. Medlin Jr., Stephen C. Brandebura, H. Bobby Fokidis, Thomas S. Risch
Journal of the Arkansas Academy of Science
No abstract provided.
90th Annual Meeting, 2006. Program, Academy Editors
90th Annual Meeting, 2006. Program, Academy Editors
Journal of the Arkansas Academy of Science
No abstract provided.
Study Of Causal Component Placement In An Active Sound Cancellation System, Eileen Anderson, Andrew B. Wright
Study Of Causal Component Placement In An Active Sound Cancellation System, Eileen Anderson, Andrew B. Wright
Journal of the Arkansas Academy of Science
In a feedforward Active Sound Cancellation (ASC) system, the acoustic delay between a primary source and an error microphone must be greater than the delay between the measurement of that source by the reference microphone and the arrival of the secondary source's wave at the error microphone. Such a configuration is called a causal configuration. For periodic disturbances, cancellation can still be achieved in non-causal configuration. Since the waveform is periodic, each cycle of the waveform is identical, and the cycle being canceled is not the measured part of the waveform, but a subsequent cycle in the waveform. Non-periodic sources …
Discovery Of A Dicephalic Western Diamondback Rattlesnake, Crotalus Atrox (Serpentes: Viperidae), From Texas, With A Summary Of Dicephalism Among Members Of The Genus Crotalus, Chris T. Mcallister, Van Wallach
Discovery Of A Dicephalic Western Diamondback Rattlesnake, Crotalus Atrox (Serpentes: Viperidae), From Texas, With A Summary Of Dicephalism Among Members Of The Genus Crotalus, Chris T. Mcallister, Van Wallach
Journal of the Arkansas Academy of Science
We document the fourth record of a dicephalic western diamondback rattlesnake, Crotalus atrox, collected on 17 September 2005 in Tom Green County, Texas, along with features of its external and internal anatomy, which are compared with normal C. atrox neonates. This is only the second reported case of complete anatomical duplication of the respiratory system and nearly complete duplication of the circulatory and digestive systems in dicephalic snakes. In addition, we present a summary of dicephalism among 10 species within the genus Crotalus.
Status Survey Of The Peppered Shiner, Notropis Perpallidus Hubbs And Black, In Arkansas And Oklahoma, Henry W. Robison
Status Survey Of The Peppered Shiner, Notropis Perpallidus Hubbs And Black, In Arkansas And Oklahoma, Henry W. Robison
Journal of the Arkansas Academy of Science
The peppered shiner, Notropis perpallidus Hubbs and Black, is a small, silvery, upland stream fish found only in southwestern Arkansas and eastern Oklahoma. This fish species was studied from 1999-2001 to determine its distribution, habitat, and conservation status. A total of81 collections was made during the 2-year study; however, only 17 specimens were collected. The present distribution of the peppered shiner in Arkansas and Oklahoma is described as well as the conservation status of this cyprinid in both states.
Density Functional Studies Of The Structure And Bonding In Piano Stool Carbene Complexes, John P. Graham, Robbie Davis
Density Functional Studies Of The Structure And Bonding In Piano Stool Carbene Complexes, John P. Graham, Robbie Davis
Journal of the Arkansas Academy of Science
No abstract provided.
Vascular Flora Of The South Fork Native Plant Reserve, Van Buren County, Arkansas, Theo Witsell, Brent Baker
Vascular Flora Of The South Fork Native Plant Reserve, Van Buren County, Arkansas, Theo Witsell, Brent Baker
Journal of the Arkansas Academy of Science
The South Fork Native Plant Preserve, a property owned and managed by the Gates Rogers Foundation, Inc., is located along the South Fork of the Little Red River (now Greers Ferry Lake) in Van Buren County, Arkansas. We conducted a floristic inventor/ of a 61.3 ha study area consisting of the preserve, adjacent lakefront property owned by the U.S. Army Corps of Engineers, and a riparian corridor on neighboring land from February through November 2005. A total of 582 vascular plant taxa, representing 118 families and 336 genera, was documented including six species (Carex lupuliformis Sartwell ex L.H.Dewey, Carex swanii …
Hyperinfection With The Bass Tapeworm, Proteocephalus Ambloplites (Cestoda), In The Black Basses Micropterus Punctulatus And M. Dolomieui From Certain Arkansas Reservoir Lakes, James J. Daly Sr., Randal J. Keller, Bruce Deyoung
Hyperinfection With The Bass Tapeworm, Proteocephalus Ambloplites (Cestoda), In The Black Basses Micropterus Punctulatus And M. Dolomieui From Certain Arkansas Reservoir Lakes, James J. Daly Sr., Randal J. Keller, Bruce Deyoung
Journal of the Arkansas Academy of Science
No abstract provided.
New Evidence For A Maternity Colony Of The Indiana Bat (Myotis Sodalis) In The Delta Of Arkansas, Stephen C. Brandebura, Rex E. Medlin Jr., Thomas S. Risch
New Evidence For A Maternity Colony Of The Indiana Bat (Myotis Sodalis) In The Delta Of Arkansas, Stephen C. Brandebura, Rex E. Medlin Jr., Thomas S. Risch
Journal of the Arkansas Academy of Science
No abstract provided.
Understanding Global Positioning System Limitations: A Case Study Of Mapping And Survey Grade Gps, Buren B. Defee Ii, Chris Stuhlinger
Understanding Global Positioning System Limitations: A Case Study Of Mapping And Survey Grade Gps, Buren B. Defee Ii, Chris Stuhlinger
Journal of the Arkansas Academy of Science
defee@uamont.edu
Revised Publication Policies And Instructions For Prospective Authors, Academy Editors
Revised Publication Policies And Instructions For Prospective Authors, Academy Editors
Journal of the Arkansas Academy of Science
No abstract provided.
Table Of Contents, Academy Editors
Table Of Contents, Academy Editors
Journal of the Arkansas Academy of Science
No abstract provided.
Organometallic Ruthenium Complexes Of Novel Thiosemicarbazones, Floyd A. Beckford, Amon T. Holt
Organometallic Ruthenium Complexes Of Novel Thiosemicarbazones, Floyd A. Beckford, Amon T. Holt
Journal of the Arkansas Academy of Science
We present the preliminary results of a study of two novel thiosemicarbazones (TSCs) and theirruthenium complexes. The TSCs were prepared by refluxing thiosemicarbazide with 9-anthraldehyde or benzanthrone in ethanol for 3 hours. The metal complex of each ligand (complex I =[(r|6 -C6H6 )Ru(9-ant-TSC )(C1)]C1 and complex II= [(r|6 -C6H6 )Ru(benz-TSC)(Cl)]Cl) was prepared by refluxing the appropriate TSC with [(r|6 -C6H6 )RuCl 2 ] r The compounds were characterized using infrared, ultraviolet-visible, and NMRspectroscopy. Two different methods, the disk diffusion test and luminometry, were used to test the compounds against a variety of different bacterial strains for antibacterial activity. The most …
90th Annual Meeting, 2006. Secretary's Report And Financial Statement, Academy Editors
90th Annual Meeting, 2006. Secretary's Report And Financial Statement, Academy Editors
Journal of the Arkansas Academy of Science
No abstract provided.
Density Functional Studies Of The Structure And Bonding Of Nitrosyl Metalloporphyrin Complexes, John P. Graham, Robbie Davis
Density Functional Studies Of The Structure And Bonding Of Nitrosyl Metalloporphyrin Complexes, John P. Graham, Robbie Davis
Journal of the Arkansas Academy of Science
Density functional calculations were used to determine optimized geometries fornitrosyl-metalloporphyrin complexes of Fe(II),Co(II)and Mn(II).The optimized structures were found to be consistent with experimental data and previous computational predictions using single point density functional calculations. Vibrational frequencies for the N-0stretching mode were also calculated and shown to be consistent with experimental data. The nature of the bonding between the metal center and nitrosyl ligand is discussed in relation to the structure of the M-N-0 linkage. The results were found to be consistent with previous descriptions derived from the Fenske-Hall approximate molecular orbital method. Other interesting structural features in the optimized geometries …
Aquatic Macroinvertebrates Of The Strawberry River System In North-Central Arkansas, George L. Harp, Henry W. Robison
Aquatic Macroinvertebrates Of The Strawberry River System In North-Central Arkansas, George L. Harp, Henry W. Robison
Journal of the Arkansas Academy of Science
The Strav/berry River has been designated an Extraordinary Resource Water, an Ecologically Sensitive Water Body, and a Natural and Scenic Waterway. As such, it is particularly important that the biodiversity of this river system be documented thoroughly. The purpose of this research was to develop a comprehensive list of the aquatic macroinvertebrates of the Strawberry River and its major tributaries. The information was developed from a thorough literature review and by examining specimens housed in various collections of the Arkansas State University Museum of Zoology and collections of the authors. The latter included 9 collections at 4 sites along the …
Biomass Dynamics Of Tipula (Insecta: Diptera) In Forested Streams Of The Interior Highlands, Arkansas, Samuel B. Mccord, Alan D. Christian, Richard S. Grippo
Biomass Dynamics Of Tipula (Insecta: Diptera) In Forested Streams Of The Interior Highlands, Arkansas, Samuel B. Mccord, Alan D. Christian, Richard S. Grippo
Journal of the Arkansas Academy of Science
Abundance patterns of aquatic macroinvertebrates that utilize coarse particulate organic matter as a food source are important indicators of non--point source pollution associated with silviculture activities. This group, referred to as shredders, typically decreases in abundance as its food source—primarily leaves—is removed from the ecosystem. We tested whether larval biomass of the crane fly Tipula, a common member of the group, was an effective estimator of shredder abundance. Additionally, we used regression analysis to test whether the length to dry mass relationship of Tipula differed among geographic regions, between seasons, and between years. Results did not indicate significant differences in …
Journal Of The Arkansas Academy Of Science - Volume 60 2006, Academy Editors
Journal Of The Arkansas Academy Of Science - Volume 60 2006, Academy Editors
Journal of the Arkansas Academy of Science
No abstract provided.
Leeches (Annelida: Hirudinida) Of Northern Arkansas, William E. Moser, Donald J. Klemm, Dennis J. Richardson, Benjamin A. Wheeler, Stanley E. Trauth, Bruce A. Daniels
Leeches (Annelida: Hirudinida) Of Northern Arkansas, William E. Moser, Donald J. Klemm, Dennis J. Richardson, Benjamin A. Wheeler, Stanley E. Trauth, Bruce A. Daniels
Journal of the Arkansas Academy of Science
Twenty-one lotic and lentic environments throughout central and northern Arkansas were surveyed for the presence of leeches during June 2004 and April, July - October 2005. Fourteen species of leeches {Helobdella elongata, Helobdella papillata, Helobdella stagnalis, Placobdella cryptobranchii, Placobdella multilineata, Placobdella ornata, Placobdella papillifera, Placobdella parasitica, Placobdella phaler a, Placobdella picta, Haemopis marmorata, Erpobdella fervida, Erpobdella microstoma, and Erpobdella punctata) representing 3 families were collected. Five species (H. elongata, P. cryptobranchii, P. multilineata, H. marmorata, and E. fervida) are reported from Arkansas for the first time. The natural history of the 22 species of leeches now known from Arkansas is …
Variational Symmetries And Conservation Laws In Linearized Gravity, Balraj Menon
Variational Symmetries And Conservation Laws In Linearized Gravity, Balraj Menon
Journal of the Arkansas Academy of Science
The methods of symmetry group analysis are applied to the action functional of linearized gravity to derive necessary conditions for the existence of variational symmetries. Two classes of variational symmetries of linearized gravity are discussed, and the local conservation laws associated with these variational symmetries are presented by applying Noether's theorem
Parallel Algorithms For Multicriteria Shortest Path Problems, David L. Sonnier
Parallel Algorithms For Multicriteria Shortest Path Problems, David L. Sonnier
Journal of the Arkansas Academy of Science
This paper presents two strategies for solving multicriteria shortest path problems with more than two criteria. Given an undirected graph within vertices, medges, and a set of K weights associated with each edge, we define a path as a sequence of edges from vertex s to vertex t. We want to find the Pareto-optimal set of paths from s to t. The solutions proposed herein are based on cluster computing using the Message-Passing Interface (MPI) extensions to the C programming language. We solve problems with 3 and 4 criteria, using up to 8 processors in parallel and using solutions based …
Perkin Reaction: Rapid And Efficient Process Optimization Through A Microwave/Design Of Experiments Couple, R. David Pace, Laura Mcwilliams
Perkin Reaction: Rapid And Efficient Process Optimization Through A Microwave/Design Of Experiments Couple, R. David Pace, Laura Mcwilliams
Journal of the Arkansas Academy of Science
Microwave chemistry and a Design of Experiments (DOE) protocol were employed together in order to rapidly and efficiently optimize a modified Perkin reaction. Microwave heating significantly reduced the reaction time, and the DOE provided a statistically significant understanding of underlying process relationships in a minimum number of experimental runs. In all, the reaction time was reduced from1hour to 2 minutes, factors important to yield were identified, an interesting cross-term interaction was discovered, and it was demonstrated that the more economical sodium acetate trihydrate catalyst was a viable alternative to the more costly anhydrous sodium acetate.
Evaluation Of Cross Pollination Of Zephyranthes And Habranthus Species And Hybrids, Moytri Roy Chowdhury, John Hubstenberger
Evaluation Of Cross Pollination Of Zephyranthes And Habranthus Species And Hybrids, Moytri Roy Chowdhury, John Hubstenberger
Journal of the Arkansas Academy of Science
The genus Zephyranthes and the related genus Habranthus in the family Amaryllidaceae are commonly grown ornamental bulbs having new world homologies. Inter-specific and inter-generic hybridizations are complicated by the fact that some of the species are apomictic, cross incompatible, or have widely variable 2n chromosome numbers. A simple, inexpensive method of pollen storage was tested to evaluate the production of hybrid seed. Intact anthers harvested after pollen release and stored at 4°C were used for pollination. Emasculated flowers were pollinated at noon on the first or second day of anthesis. Hybrid crosses were labeled and seed collected when formed. All …
Safety Of A Red Diode Laser Source For Fetal Retinal Stimulation Studies, Alois (Al) J. Adams, James D. Wilson
Safety Of A Red Diode Laser Source For Fetal Retinal Stimulation Studies, Alois (Al) J. Adams, James D. Wilson
Journal of the Arkansas Academy of Science
No abstract provided.
Geographic Distribution And Harvest Dynamics Of The Eastern Spotted Skunk In Arkansas, D. Blake Sasse, Matthew E. Gompper
Geographic Distribution And Harvest Dynamics Of The Eastern Spotted Skunk In Arkansas, D. Blake Sasse, Matthew E. Gompper
Journal of the Arkansas Academy of Science
The eastern spotted skunk (Spilogale putorius) is a small carnivore found across much of the central and southeastern United States, and while once common, this species has become rare in most obits range. We used harvest records collected by the Arkansas Game and Fish Commission from 1941-2004 to examine historic and current distribution and long-term harvest dynamics of this species in Arkansas. Eastern spotted skunks have historically been most common in the Ozarks and the Ouachitas though the species appears to have been present, but uncommon, in the Gulf Coastal Plain and in some counties in southeastern Arkansas near the …
Unusual Prey Item Found In An Eastern Bluebird Nest, Sarah De Viney Baxter, Richard J. Baxter, Thomas S. Risch
Unusual Prey Item Found In An Eastern Bluebird Nest, Sarah De Viney Baxter, Richard J. Baxter, Thomas S. Risch
Journal of the Arkansas Academy of Science
No abstract provided.
Ichthyofaunal Assemblages In Three Approximate But Ecologically Diverse Streams In Clark County, Arkansas, C. Renn Tumlison, Scott Jordan, Lesley Self, Henry W. Robison
Ichthyofaunal Assemblages In Three Approximate But Ecologically Diverse Streams In Clark County, Arkansas, C. Renn Tumlison, Scott Jordan, Lesley Self, Henry W. Robison
Journal of the Arkansas Academy of Science
Three tributaries to the Ouachita River in eastern Clark County, Arkansas, empty into the river within a collective distance of about 9 km. The streams drain basins derived from the Wilcox formation, partially overlain by terrace and alluvial deposits. Despite their proximity, the streams are very different: L'Eau Frais has a gravel substrate and was recognized by the French as a cool water stream, Tupelo Creek is a bottomland stream from which numerous Water Tupelo (Nyssa aquatica) emerge, and Saline Bayou was named due to its marked salinity. We studied the assemblages of fishes in these 3 very different drainages …
New Distributional Records Of Lampreys From Arkansas, Henry W. Robison, C. Renn Tumlison, James C. Petersen
New Distributional Records Of Lampreys From Arkansas, Henry W. Robison, C. Renn Tumlison, James C. Petersen
Journal of the Arkansas Academy of Science
No abstract provided.
Electron Shock Waves, Mostafa Hemmati, Michael Weller, Taylor Duncan
Electron Shock Waves, Mostafa Hemmati, Michael Weller, Taylor Duncan
Journal of the Arkansas Academy of Science
In this paper we describe numerical investigations of breakdown waves concentrating on antiforce waves. We employed one-dimensional electron fluid dynamical equations for a luminous pulse wave propagating into a neutral gas region and subjected to an applied electric field. We assumed that the electrons were the main element in the propagation of the wave and that the electron gas partial pressure provided the driving force. These waves are considered to be shock fronted and are composed of two regions: the thin sheath region behind the shock front and the thicker quasi-neutral region following the sheath region. Our set of equations, …