Development of a flow visualization apparatus

The use of an optical flow visualization device for studying convection flow patterns was investigated. The investigation considered use of a shadowgraph, schlieren and other means for visualizing the flow. A laboratory model was set up to provide data on the proper optics and photography procedures to best visualize the flow. A preliminary design of a flow visualization system is provided as a result of the study. Recommendations are given for a flight test program utilizing the flow visualization apparatus

Integrated Cryogenic Experiment (ICE) microsphere investigation

The main objective is to determine the performance of microsphere insulation in a 0-g environment and compare its performance to reference insulations such as multilayer insulation. The Lockheed Helium Extended-Life Dewar (HELD) is used to provide superfluid-helium cold sink for the experiment. The use of HELD allows the low-g dynamic properties of Passive Orbital Disconnect Struts (PODS) to be characterized and provides a flight demonstration of the PODS system. The thermal performance of microspheres in 1 and 0 g was predicted, a flight experiment was designed to determine microsphere thermal performance, and the interface was also designed between the experimental package and the shuttle through HELD and the Hitchhiker-M carrier. A single test cell was designed and fabricated. The cell was filled with uncoated glass microspheres and tested with a liquid-nitrogen cold sink. The data were found to agree with predictions of microsphere performance in 1 g

Simulating medical isolation: Communicatively managing patient and medical team safety

Reducing hospital acquired or associated infections (HAIs) is a national public health priority. HAIs pose risks to patients, visitors, and medical personnel. To better understand how to communicatively manage safety in medical isolation, data was collected with nursing students simulating medical isolation in a high-fidelity simulation with a medical mannequin with C. difficile. Observations of nursing students and faculty revealed four distinct communication practices: social support, patient education, humor, and storytelling. Conclusions include recommendations to intentionally design these communication practices into high-fidelity medial isolation simulations and scale up these communication practices in routines of safety

Multi-specie condensation in expanding flows

Multispecie condensation in expanding flows, and one dimensional condensing flow equation

Reflexivity and Practice in COVID-19: Qualitative Analysis of Student Responses to Improvisation in Their Research Methods Course

The improvisations needed to adapt to COVID-19 teaching and learning conditions affected students and faculty alike. This study uses chaos theory and improvisation to examine an undergraduate communication research methods course that was initially delivered synchronously/face-to-face and then transitioned to asynchronous/online in March 2020. Reflective writings were collected at the end of the semester with the 25 students enrolled in the course and follow-up interviews conducted with six students. Thematic analysis revealed that available and attentive student-participant, student-student, and student-instructor communication complemented learner-centered and person-centered goals, but unavailable or inattentive communication, especially with participants and students in the research team, contributed to negative perceptions of learner-centered goals. Implications explore how communication research methods pedagogy may achieve greater available, attentive, and learner/person-oriented goals through modeling, resourcing, reflexivity, and appreciation in online and offline course delivery to enhance shifts in communication pedagogy, whether voluntarily or involuntarily initiated by faculty

Statistical Validation of Exit Examination Results

In an effort to validate teaching effectiveness within the College of Business at Lamar University a standardized achievement test, the Business Major Field Test, offered by the Educational Testing Service of Princeton, NJ, was administered to a relatively large sample (69) of the class of graduating seniors in the spring semester of 2001.  The overall results placed the average of Lamar’s graduating business majors at approximately the 70th percentile among the institutions taking the exam.  Considering the popularly held opinion that the entering freshman class at Lamar ranks closer to the 40th percentile of those taking the SAT, these results seemed almost too good to be true.  This study is designed to describe our testing methods, validate or invalidate this “value-added” result, and discuss our future plans

Skylab M518 multipurpose furnace convection analysis

An analysis was performed of the convection which existed on ground tests and during skylab processing of two experiments: vapor growth of IV-VI compounds growth of spherical crystals. A parallel analysis was also performed on Skylab experiment indium antimonide crystals because indium antimonide (InSb) was used and a free surface existed in the tellurium-doped Skylab III sample. In addition, brief analyses were also performed of the microsegregation in germanium experiment because the Skylab crystals indicated turbulent convection effects. Simple dimensional analysis calculations and a more accurate, but complex, convection computer model, were used in the analysis

Formulation of a method for predicting coupled convective and radiative heat transfer about a blunt body

Method for predicting coupled convective and radiative heat transfer about blunt bod

The effects of shock layer radiation and viscous coupling on the total heating rate to a reentering blunt body

Coupling radiative and convective heat transfer in hypersonic blunt body reentr

Finite difference grid generation by multivariate blending function interpolation

The General Interpolants Method (GIM) code which solves the multidimensional Navier-Stokes equations for arbitrary geometric domains is described. The geometry module in the GIM code generates two and three dimensional grids over specified flow regimes, establishes boundary condition information and computes finite difference analogs for use in the GIM code numerical solution module. The technique can be classified as an algebraic equation approach. The geometry package uses multivariate blending function interpolation of vector-values functions which define the shapes of the edges and surfaces bounding the flow domain. By employing blending functions which conform to the cardinality conditions the flow domain may be mapped onto a unit square (2-D) or unit cube (3-D), thus producing an intrinsic coordinate system for the region of interest. The intrinsic coordinate system facilitates grid spacing control to allow for optimum distribution of nodes in the flow domain