Daniel Stuart Wood

Texas A&M University - Texarkana | TAMUT · Department of Criminal Justice

The use of simulation tools by vehicle manufacturers to design, optimize and validate their vehicles is essential if they are to respond to the demands of their customers, to meet legislative requirements and deliver new vehicles ever more quickly. The use of such tools in the aerodynamics community is already widespread, but they remain some way f...

A large contribution to the aerodynamic drag of a vehicle (30% (1) or more depending on vehicle shape) arises from the low base pressure in the wake region, especially on square-back configurations. A degree of base pressure recovery can be achieved through careful shape optimization, but the flow structures and mechanisms within the wake that caus...

This paper describes the full scale tests for air flows in a test chamber subject to heat loads generated by human occupancy and equipment. The Particle Image Velocimetry (PIV) technique was used to investigate buoyancy-driven flows near the human thermal manikin "Victoria". Based on the experimental facility details, a full scale 3-D CFD model of...

Polyethyleneimine (PEI) is utilized in an electrolytic bath for the planarization of electrodeposited nanowire growth fronts in porous anodic alumina templates. The addition of highly branched, low-molecular-weight PEI to the plating bath also provides improved uniformity in the distribution of nanowire growth rates from pore to pore and allows for...

Black graptolitic shales of approximately D. clingani age were seen resting on flaggy beds with an Upper Longvillian fauna, which are taken to belong to the Upper Ash Group of Elles. This section conflicts with the details published concerning the nearby Conway railway cutting and an attempt is made to correlate the two sections. The work shows tha...

The data collected from studies to monitor inactivation of Escherichia coli O157:H7 in uncooked fermented salami were used to develop models to describe survival of the organism. Three models were developed that included different variables to best describe E. coli O157:H7 reduction. Model A included the variables water activity (a(w)), pH, time, a...

An aeroponic system basically is an air water culture technique in which the plant roots are suspended in air and sprayed with nutrient solution. Development of an aeroponic system for fruit trees to provide access to clean intact roots for direct observation, measurement and other experimental purposes such as application of precise levels of exog...

Radio continuum observations were made of 59 IRAS sources that have 100mum flux densities >=1000Jy and far-infrared colors identified with ultracompact (UC) HII regions. Eighty percent were found to have associated compact radio sources. Seventy-five sources were detected at

We calculated bolometric temperature (T(sub bol)) and luminosity (L(sub bol)) for 128 young stellar objects (YSOs) in Taurus, 74 in the Ophiuchus 'core', and 33 in the Ophiuchus 'off-core' region. We have constructed the bolometric luminosity-temperature (BLT) diagram, the log-log plot of L(sub bol) versus T(sub bol), for the three samples. T(sub b...

We are using the newIRAS Sky Survey Atlas to construct a catalog of Galactic dark clouds and their associated Young Stellar Objects (YSOs). FromIRAS 100 and 60m data we calculate images of the 100m optical depth distribution in the clouds. Using theIRAS Faint Source Catalog we identify sources which have colors indicative of YSOs and have positions...

Ultracompact (UC) HII regions manifest themselves through infrared emission from circumstellar dust, the radio continuum of their dense, ionized gas, and by remnant molecular gas from which the massive stars recently formed. Using the IRAS Point Source Catalog, Wood & Churchwell (1989) identified ~ 1600 UC HII candidates. Since then, radio continuu...

Bolometric temperature (Tbol) is defined as the temperature of a blackbody having the same mean frequency as the observed continuum spectrum. It measures the redness (or youth) of young stellar objects (YSOs). We calculated Tbol and bolometric luminosity (Lbol) of all the known YSOs in Taurus, Ophiuchus core, and Ophiuchus off-core regions. Most of...

Radio continuum observations were made of 59 IRAS sources that have 100 μm flux densities ≥ 1000 Jy and far-infrared colors identified with ultracompact (UC) H II regions. Eighty percent were found to have associated compact radio sources. Seventy-five sources were detected at ≲1″ resolution at 3.6 and 2 cm wavelengths, for which we provide contour...

We present recent results from our effort to construct and Atlas of Dark Clouds based on the IRAS Sky Survey Atlas (ISSA). The clouds in this study cover a wide range of physical properties including visual extinction, size, mass, degree of isolation, homogeneity and morphology. From the 100 microns and 60 microns images of the ISSA, we calculate t...

New data are presented here that firmly establish the nonthermal nature of the radio emission from the enigmatic radio and optical nebula G70.7 + 1.2. H-alpha and forbidden O I Fabry-Perot observations are used to argue that the extended optical emission from the nebula arises from a bow shock powered by a mass-losing luminous star moving supersoni...

The paper reports on new molecular line observations at 1.3 and 3.0 mm toward eleven UC H II regions, made using the IRAM 30-m telescope on Pico Veleta (Spain). The lines observed were (C-13)O (1-0 and 2-1), CS (2-1 and 5-4), and CH3CN (6-5 and 12-11). The data led to the following conclusions: (1) the peak line velocities of all three molecules ag...

The H76-alpha recombination line emission distribution from the cometary UC H II regions G29.96 - 0.02 has been mapped with a resolution of 0.62 x 0.49 arcsec. The distribution of radial velocities in the ionized gas is well ordered. There is an unambiguous velocity gradient across the face of the nebula with velocities ranging from about 80 km/s o...

We report observations of H30α, H42α, and H76α line emission toward a selection of 12 ultracompact (UC) HII regions. These same UC HII regions have also been imaged with the VLA. Continuum and radio recombination line (RRL) models have been calculated and compared. For the highest density nebulae, single component models do not seem to be consisten...

The authors report high-resolution, VLA observations at 2 cm of 22 compact radio continuum sources toward the core of the Orion Nebula. This region contains the highest density of compact radio sources known. The sources are clustered mostly in the region of the Trapezium and the KL nebula. The brightest radio source on 1986 April 28 coincided with...

The lipophilic anion tetraphenylboron (TPB-) but not the lipophilic cation tetraphenylarsonium (TPA+) inhibited ATP-dependent Ca2+ accumulation by isolated sarcoplasmic reticulum. TPB- did not inhibit ATP hydrolysis but did induce Ca2+ release from preloaded vesicles. It did not appear to disrupt lipid bilayers or to act as a Ca2+ ionophore since i...

Malignant hyperthermia occurs in humans with several congenital myopathies, usually in response to general anesthesia. Commonly, individuals who develop this syndrome lack symptoms of muscle disease, and their muscle lacks specific pathological changes. A biochemical marker for this myopathy has not previously been available; we found activity of a...

Sarcoplasmic reticulum vesicles from mammalian skeletal muscle have previously been shown to develop a proton gradient (alkaline inside) of 0.15-0.5 pH units during active Ca2+ uptake. We found that dissipation of this gradient by the proton ionophores gramicidin, nigericin, and carbonyl cyanide p-trichloromethoxyphenylhydrazone caused a rapid tran...

In a report of two patients who died of malignant hyperthermia, muscle adenylate kinase deficiency was identified in the father and brother of the deceased. To determine if this enzyme deficiency was a biochemical marker for susceptibility to malignant hyperthermia, we measured adenylate kinase in muscle of three survivors of malignant hyperthermia...

We studied the morphology of rabbit psoas muscle fixed at increasing intervals of time in a chemical skinning solution (Wood et al., 1975), or after skinning and storage for times up to 1 week. The storage solution, in which the chemically skinned muscled fibers were kept at -20 degrees C, had the same ionic composition as the skinning solution but...

Pollen from the hybrid Malus cv Baskatong, apparently homozygous for a dominant gene giving intense anthocyanin in the foliage, was used in a dispenser. Apple seeds were later excised, the embryos exposed to bright light for 3–5 days, and the pigmentation of the cotyledons recorded. Hand pollinations showed that pollen tube growth, fertilization an...

Skinned, single-fiber preparations from the quadriceps or gastrocneumius muscles of four ambulatory male children with Duchenne dystrophy were tested for theri ability to generate tension and to regulate CA++. To determine the intrinsic strength (P0) of the contractile material, the maximum Ca++ -activated tensions were normalized to the fiber diam...

The proximal accessory flexor (PAF) of the myochordotonal organ (MCO) in the meropodite of crayfish walking legs contains two populations of muscle fibers which are distinguishable by their diameters. The large accessory (LA) fibers are 40-80 micrometer in diam and are similar in ultrastructure to other slow crustacean fibers. The small accessory (...

A "skinning%" procedure is described for irreversibly disrupting the sarcolemmal membrane of human skeletal muscle and allowing calcium and other diffusible solutes (such as adenosine triphosphate) access to the myofilament space. Single skinned fibers give isometric tensions of about 1.5 kilograms per square centimeter when exposed to ionized calc...

The design conditions for CW Zircaloy-2 pressure tubes based on a creep limit approach are considered in this paper. A creep limit is adopted such that the time taken to reach this limit is no more than half of that taken to cause rupture. Out of reactor rupture tests of up to 4000 h duration on 13 cm dia. pressure tubes indicate that a 2% creep li...

The effect of the long stress relieving treatments given to reactor ; pressure vessels on the tensile, Charpy impact, creep and stress rupture ; properties of reactor quality, low-carbon, high-manganese, 28 tons/in.² ; steels was investigated. A considerable number of casts were tested, including ; open-hearth Si-killed steel, open-hearth Al grain...

Collection of 19 papers by various authors. Some of the topics discussed are; design of thermal barrier systems for HTR, helium quality control and circuit purification, fretting in tube supports of heat exchanges, fault conditions, boilers for HTR applications, and design and development of plant for on-load refuelling. Following is a list of the...

Porous anodic alumina (PAA) has generated increasing attention over the past decade for its use as a sacrificial template in the electrochemical synthesis of high-aspect-ratio nanomaterials. However, a significant challenge that still remains unsolved concerns the control over the shape of the growth front of electrodeposited materials in a PAA tem...

The velocities of individual dislocations of edge and mixed types in pure aluminum single crystals were determined as a function of applied‐resolved shear stress and temperature. The dislocation velocities were determined from measurements of the displacements of individual dislocations produced by stress pulses of known duration. The Berg‐Barrett...

In a previous article(1) the authors reported determinations of the velocity of dislocations in high-purity single crystals of aluminum as a function of applied stress in the temperature range 123° to 343°K. These results were obtained using a stress-pulse technique in which dislocation positions were observed before and after the stress pulse usin...

This paper presents the results of measurements of the velocities of 〈12̄10〉 (0001) edge dislocations in zinc as a function of applied shear stress. All tests were conducted at room temperature on 99.999% pure zinc monocrystals. Dislocations were revealed by means of the Berg-Barrett x-ray technique. Stress pulses of microsecond duration were appli...

Experimental measurements of basal dislocation mobility and the strain-rate sensitivity of the flow stress have been made on 99.999% pure zinc single crystals. Dislocation mobility in the [ 2 ] (0001) basal slip system was measured by observing slip band growth produced by load pulses of controlled amplitude and duration. Local rearrangement of dis...

A relatively simple system for the critical comparison of the two microscope images is described below. This system has advantages not offered by the split field optical system normally employed for the comparison of images. The split-field system places the images from two microscopes side by side as viewed through a single eyepiece. The system de...

Measurements of strain, dislocation density, and dislocation velocity have been made in 99.999% Zn stressed in compression along the hexagonal axis, [0001]. Slip bands on the second order pyramid,〈1213〉{1212}, system were observed. The average dislocation density increases linearly with strain. The velocity of edge dislocations in slip bands obeys...

A dynamic torsion testing machine has been built for the purpose of applying a known constant shear stress to a 12.7‐mm‐diam cylindrical test specimen for very short periods of time. The shear stress at the surface of the specimen rises from zero to any desired value in the range 0 to 3000 psi, within a period of 4 to 6 μsec. The time at constant s...

This paper presents the results of experimental measurements of the influence of grain size upon the static yield point and the delay time for yielding in a very low carbon steel. These are interpreted in terms of a theory based upon the assumption that macroscopic yielding begins after slip bands have formed in a certain fraction of all grains and...

This paper presents the results of an investigation of static and dynamic shear behaviour of two purities of zinc single crystals. All the crystals tested were in the form of cylindrical rods with the [0001] crystallographic direction parallel to the rod axis. The static tests were performed by applying simple transverse shear loading in one of the...

Pre-yield plastic and anelastic microstrains in an annealed low-carbon steel have been measured as a function of time under rapidly applied constant tensile stress at temperatures of −23°F (−31°C), + 76°F (+ 24°C), and + 150°F (+ 66°C). The rates of pre-yield microstrain when stress is first applied are compared with the theoretical rates for the t...

This paper presents the results of an experimental investigation of the behavior of an annealed low-carbon steel subjected to rapidly applied constant stresses less than the static upper yield stress. Sensitive measurements of plastic and anelastic microstrain were made and the relationship between stress and equilibrium microstrain determined. Th...

This paper presents the results of an experimental investigation of the behavior of an annealed low carbon steel subjected to a rapidly applied constant stress and to repeated short-duration stress-pulses. The test stresses were greater than the upper yield stress. The material was aged at various temperatures between stress-pulses, and the effect...