A Single-armed Manta-board as a New Diver-controlled Planing Board and Its Use for Underwater Surveys

Due to inadequacies of previous underwater towing techniques and the special needs of a recent underwater survey, a modified mania-board technique was developed. With this new technique, the diver holds on to the manta-board with one arm; consequently, the board is referred to as a single-armed manta-board (sam-board). The sam-board proved inexpensive and highly maneuverable, allowing the divers to freely collect samples or record information. Through some experimenting with the board and changing some of the variables, such as rope lengths, towing speeds, etc., a highly efficient towing method can be achieved. Preplanning and strict diving safety procedures must, however, be implemented to assure efficiency. This paper presents the materials, guidelines for board construction, equipment, and preplanning and diving safety procedures necessary for the sam-board towing operation

Verification of TG-61 dose for synchrotron-produced monochromatic x-ray beams using fluence-normalized MCNP5 calculations

Ion chamber dosimetry is being used to calibrate dose for cell irradiations designed to investigate photoactivated Auger electron therapy at the Louisiana State University CAMD synchrotron facility. This study performed a dosimetry intercomparison for synchrotron-produced monochromatic x-ray beams at 25 and 35 keV. Ion chamber depth-dose measurements in a PMMA phantom were compared with the product of MCNP5 Monte Carlo calculations of dose per fluence and measured incident fluence. Monochromatic beams of 25 and 35 keV were generated on the tomography beamline at CAMD. A cylindrical, air-equivalent ion chamber was used to measure the ionization created in a 10x10x10-cm3 PMMA phantom for depths from 0.6 to 7.7 cm. The American Association of Physicists in Medicine TG-61 protocol was applied to convert measured ionization into dose. Photon fluence was determined using a NaI detector to make scattering measurements of the beam from a thin polyethylene target at angles 30 degrees to 60 degrees. Differential Compton and Rayleigh scattering cross sections obtained from xraylib, an ANSI C library for x-ray-matter interactions, were applied to derive the incident fluence. MCNP5 simulations of the irradiation geometry provided the dose deposition per photon fluence as a function of depth in the phantom. At 25 keV the fluence-normalized MCNP5 dose overestimated the ion-chamber measured dose by an average of 7.2+/-3.0% to 2.1+/-3.0% for PMMA depths from 0.6 to 7.7 cm, respectively. At 35 keV the fluence-normalized MCNP5 dose underestimated the ion-chamber measured dose by an average of 1.0+/-3.4% to 2.5+/-3.4%, respectively. These results showed that TG-61 ion chamber dosimetry, used to calibrate dose output for cell irradiations, agreed with fluence-normalized MCNP5 calculations to within approximately 7% and 3% at 25 and 35 keV, respectively.Comment: 22 pages, 5 figure

CIVIC COMMUNITY APPROACHES TO RURAL DEVELOPMENT IN THE SOUTH: ECONOMIC GROWTH WITH PROSPERITY

The free market-based policies of the corporate community model have skewed economic development across the South. For many small, rural communities, the consequences of global capitalism have resulted in declining real wages, high underemployment, and increasing rates of income inequality. Backed by recent scholarship and grassroots movements that suggest both civic engagement and the presence of smaller-scale, locally controlled enerprises can help determine whether communities prosper or decline, this paper explores the links between social structure and rural development in the South. The goal is to expand our understanding of civic community theory as an alternative to the neoclassical economic model of development. Using a local problem-solving framework, we suggest that a departure from the traditional, neoclassical path of development is in order. We conclude that rural policy makers must establish a role for civic community in the rural development process if they wish to protect the welfare of workers and communities, while increasing the prospects of economic growth with prosperity.civic community, economic growth, rural development, social capital, Southern United States, Community/Rural/Urban Development, R11, O21, R58,

Extrapunitive and intropunitive anger of HIV caregivers: Nursing implications

The purpose of this qualitative study was to investigate the anger of individuals who have provided direct patient care to loved ones who are living with or who have died from AIDS. The sample consisted of eight individuals who are currently involved in an AIDS service organization in northeast Tennessee. Data were collected using semistructured taped interviews. At the beginning of the study, two group interviews were conducted. Subsequently, each of the participants was interviewed privately. Extrapunitive and intropunitive anger were predominant themes in each of the interviews. Participants also reported ways of coping with their anger. Nurses can suggest these strategies to other caregivers who are experiencing anger. Recommendations for additional nursing interventions are offered

Design and performance of controlled-diffusion stator compared with original double-circular-arc stator

The capabilities of two stators, one with controlled-diffusion (CD) blade sections and one with double-circular-arc (DCA) blade sections, were compared. A CD stator was designed and tested that had the same chord length but half the blades of the DCA stator. The same fan rotor (tip speed, 429 m/sec; pressure ratio, 1.65) was used with each stator row. The design and analysis system is briefly described. The overall stage and rotor performances with each stator are compared, as are selected blade element data. The minimum overall efficiency decrement across the stator was approximately 1 percentage point greater with the CD balde sections than with the DCA blade sections

Relationship Between Backfat Depth and its Individual Layers and Intramuscular Fat Percentage in Swine

Results show the correlations between IMF and different measures of total fat thickness are of similar magnitude, regardless of the measure being a single measure of total subcutaneous fat or a sum of the individual layers. Results also show that the correlation between the inner and outer backfat layers is less than the correlation between the middle layer and the inner and outer layers

Gradual phyletic evolution at the generic level in early Eocene omomyid primates

Analysis of dental morphology in over 600 stratigraphically controlled specimens of tarsier-like primates from early Eocene strata in Bighorn Basin, Wyoming, provides important new data for understanding the tempo and mode of evolution in primates

Patterns of Dental Evolution in Early Eocene Anaptomorphine Primates (Omomyidae) From the Bighorn Basin, Wyoming

ABSTRACT--The subfamily Anaptomorphinae contains the oldest and most generalized members of the tarsier-like primates and is the basal group of the extinct family Omomyidae. The best and most continuous record of anaptomorphine history is from rocks of early Eocene (Wasatchian) age in the Bighorn Basin of northwest Wyoming where eight genera and 14 species are recognized. Three of these species are new (Teilhardina crassidens, Tetonius matthewi, Absarokius metoecus), and four other new species are described from elsewhere (Tetonius mckennai, Absarokius gazini, A. australis, Strigorhysis huerfanensis). Teilhardina tenuicula and Absarokius nocerai are new combined forms. Absarokius noctivagus is considered to be a synonym of A. abbotti, and Mckennamorphus is a synonym of Pseudotetonius