Deadweight calibration of pressure gages without contamination

Calibration of pressure gages is accomplished by use of fluid chamber in conjunction with conventional single chamber hydraulic deadweight tester. System eliminates cleaning of gages with liquid oxygen after tests and is simple to construct and operate

Does Theory Translate in the Trenches of Short Term Mission Work?

Despite numerous criticisms in the literature on the ethics and sustainable outcomes of short term international mission trips, there can be positive outcomes for volunteers and for recipients of short term mission care efforts. Utilizing a theoretical framework that addresses efforts to promote sustainability can lead to a structured, productive, and satisfying experience. With effective host country partnerships and an organized model of care delivery, international mission volunteers can provide highly effective health care services that are specific to the health and cultural needs of the host community

A Case Study of a Technical College\u27s Faculty Perceptions Regarding the Value of Professional Development Activities

The purpose of this qualitative research study was to investigate technical college faculty members\u27 perceptions of the professional development. Most of the literature was focused on four-year higher educational institutions. For the purposes of this qualitative case study, the researcher addressed the limited amount in the literature about professional development in two-year technical colleges. The researcher investigated faculty perceptions concerning the usefulness of professional development in a two-year higher education institution through survey research design with 8 participants. The main themes were 1) technical college faculty desired professional development; 2) technical college faculty needed for follow up from the professional development; and 3) technical college faculty perceived that the professional development was to general to be useful for improving their instructional strategies

Lead 17: Leadership Engineering and Design Program A Professional Development Series for Assistant Principals Aspiring to the Principalship

A capstone submitted in partial fulfillment of the requirements for the degree of Doctor of Education in the Ernst and Sara Lane Volgenau College of Education at Morehead State University by Melissa D. Hensley on February 9, 2021

Proliferation of Pythium nunn (Lifshitz et al.) in Tennessee soils and the effects of sugars, oils and culture filtrates of Trichoderma spp. on growth and reproduction of Pythium nunn and Pythium ultimum (Trow)

Pythium nunn (N3) a mycoparasite of other Pythium spp. , was added to five Tennessee soils (Bruno, Bowdre, Fullerton, Morganfield, and Robinsonville) to study its ability to colonize these soils. Mycelial mats were mixed into the soils and N3\u27s inoculum density was determined weekly during an eight week incubation period. Numbers of colony forming units (cfu) fluctuated from nondetectable levels to 1040 cfu\u27s/g of soil in the second to fourth week of incubation and decreased to approximately 80 cfu\u27s or lower in the fourth to eighth week. In a separate experiment, N3 s ability to colonize Morganfield and Robinsonville soils was compared with it\u27s ability to colonize Nunn sandy loam soil (a soil from Colorado from which it was originally isolated). Colony forming units of N3 were higher in the Tennessee soils than in the soil from Colorado after five weeks of incubation. The effects of eight oils on growth and/or reproduction of Pythium nunn (N1) and N3 were determined. Wheat germ oil with 20 or 3 g/1 glucose or sucrose, consistently stimulated growth of N1 when compared to the other oils with sugar or controls. Codliver, wheat germ, sesame, and sunflower oils stimulated growth of N3. Several oils had varying effects on growth of both N1 and N3 when different sugars were used. Few or no sporangia of N3 formed in the oil and sugar combinations. These two Pythium spp. apparently have different chemical requirements for growth and reproduction. Isolates of Trichoderma koningii, T. harzianum, T. viride and T. pseudokoningii were tested for their abilities to inhibit growth and/or stimulate reproduction of N3 and N1. Culture filtrates of the isolates were sterilized by cold filtration or autoclaving, were seeded with agar plugs of N1 or N3. All filtrates tested inhibited growth of N1 and N3. Two isolates of T. viride inhibited growth and oospore formation of N1 to a greater extent than did the other Trichoderma species. There was no difference in inhibition of growth and oospore formation with autoclaved or cold filtrates. Stimulation of reproductive structures in N1 and N3 by filtrates of Trichoderma species was not observed. Inhibition of growth of N3 in filtrates of Trichoderma reduces the possibility of integrating P. nunn with Trichoderma as an effective biocontrol management system

Extreme Starlight Polarization in a Region with Highly Polarized Dust Emission

Galactic dust emission is polarized at unexpectedly high levels, as revealed by Planck. The origin of the observed $\simeq 20\%$ polarization fractions can be identified by characterizing the properties of optical starlight polarization in a region with maximally polarized dust emission. We measure the R-band linear polarization of 22 stars in a region with a submillimeter polarization fraction of $\simeq 20$. A subset of 6 stars is also measured in the B, V and I bands to investigate the wavelength dependence of polarization. We find that starlight is polarized at correspondingly high levels. Through multiband polarimetry we find that the high polarization fractions are unlikely to arise from unusual dust properties, such as enhanced grain alignment. Instead, a favorable magnetic field geometry is the most likely explanation, and is supported by observational probes of the magnetic field morphology. The observed starlight polarization exceeds the classical upper limit of $\left[p_V/E\left(B-V\right)\right]_{\rm max} = 9$%mag$^{-1}$ and is at least as high as 13%mag$^{-1}$ that was inferred from a joint analysis of Planck data, starlight polarization and reddening measurements. Thus, we confirm that the intrinsic polarizing ability of dust grains at optical wavelengths has long been underestimated.Comment: Accepted by A&AL, data to appear on CDS after publication. 6 page

Psychosocial Correlates of Physical Activity in Children and Adolescents in a Rural Community Setting

The purpose of this study was to evaluate the relationships between selected psychosocial factors and the physical activity behaviors of children (grade 4-8) and adolescents (grades 9-12) in a rural community setting. The Children’s Physical Activity Scale (CPAC)was used to measure the psychosocial factors of physical activity, The Physical Activity Questionnaire-Children (PAQ-C), and Physical Activity Questionnaire-Adolescents (PAQ-A) were used to measure the physical activity behaviors of the 167 participants. Results indicated that male and female physical activity behaviors were not significantly different. However, physical activity declined with age [F(8,147) = 5.44, p \u3c 0.05, ES = 0.23]. All psychosocial factors were significantly correlated with physical activity in youth with the single highest correlation for males being “liking of exercise” (r = .61) and the highest correlation for females was “liking of games and sports”(r = .44). Stepwise regression analyses identified three subscales (liking of games and sport, liking of exercise, and parental support) in a significant prediction model of physical activity in both genders. The results indicate that children\u27s physical activity is associated with a variety of psychosocial variables that represent import predisposing and reinforcing factors

Self shielding in cylindrical fissile sources in the APNea system

In order for a source of fissile material to be useful as a calibration instrument, it is necessary to know not only how much fissile material is in the source but also what the effective fissile content is. Because uranium and plutonium absorb thermal neutrons so Efficiently, material in the center of a sample is shielded from the external thermal flux by the surface layers of the material. Differential dieaway measurements in the APNea System of five different sets of cylindrical fissile sources show the various self shielding effects that are routinely encountered. A method for calculating the self shielding effect is presented and its predictions are compared with the experimental results

A Sludge Drum in the APNea System

The assay of sludge drums pushes the APNea System to a definite extreme. Even though it seems clear that neutron based assay should be the method of choice for sludge drums, the difficulties posed by this matrix push any NDA technique to its limits. Special emphasis is given here to the differential die-away technique, which appears to approach the desired sensitivity. A parallel analysis of ethafoam drums will be presented, since the ethafoam matrix fits well within the operating range of the AIWea System, and, having been part of the early PDP trials, has been assayed by many in the NDA community