EET Senior Design Project - IMS Dynamic Display

Indiana University Purdue University IndianapolisThe Indianapolis Motor Speedway Museum has a display transmission that is still actively used in IndyCar today. The museum wants to incorporate this transmission into an interactive display, so guests of all ages can see internal gears spin as well as see the transmission shift between its gears. This project includes mechanical and electrical engineering technology students working together to mount wire motors and sensors. The transmission will have a user-friendly interface allowing the guests to change gears and to turn the transmission on and off. The transmission will be driven by a 24V DC motor and uses a 24V DC linear actuator to rotate a barrel cam to change the position of the forks, allowing the gears to get shifted up and down. A metal enclosure houses the electrical components that provide power and control to the system. The outcome of this project is a failsafe and robust system that will operate within the IMS Museum while being continually updated.Electrical Engineering Technolog

Increased Microdialysis Recovery of Large Molecular Weight Analytes via Ultrafiltration

Microdialysis is a sampling method based on the passive diffusion of solutes across a semi-permeable hollow-fiber membrane that is driven by a concentration gradient. The membrane has a defined molecular weight cutoff, which causes larger molecular solutes such as proteins with molecular weights of approximately 8-80 kDa to have low recoveries. The purpose of this research is to utilize ultrafiltration across the membrane through push-pull and vacuum ultrafiltration methods as a means to increase recovery of large molecular weight analyte. These experiments were carried out using Methyl Orange (MO), Fluorescein Isothiocyanate 4 kDa (FITC-4), and Fluorescein Isothiocyanate 40 kDa (FITC-40). In comparison to conventional microdialysis, using push-pull methods (1 uL/min push with 1, 2, 3, 4, 5, and 8 uL/min pull, respectively) increased MO recovery up to 12%, FITC-4 recovery up to 47%, and FITC-40 recovery up to 37%. In comparison to conventional microdialysis, vacuum ultrafiltration methods (0 uL/min push with 1, 2, 3, 4, 5, and 8 uL/min pull, respectively) increased MO recovery up to 30%, FITC-4 recovery up to 64%, and FITC-40 recovery up to 87%

On the Emergent Spectra of Hot Protoplanet Collision Afterglows

We explore the appearance of terrestrial planets in formation by studying the emergent spectra of hot molten protoplanets during their collisional formation. While such collisions are rare, the surfaces of these bodies may remain hot at temperatures of 1000-3000 K for up to millions of years during the epoch of their formation. These object are luminous enough in the thermal infrared to be observable with current and next generation optical/IR telescopes, provided that the atmosphere of the forming planet permits astronomers to observe brightness temperatures approaching that of the molten surface. Detectability of a collisional afterglow depends on properties of the planet's atmosphere -- primarily on the mass of the atmosphere. A planet with a thin atmosphere is more readily detected, because there is little atmosphere to obscure the hot surface. Paradoxically, a more massive atmosphere prevents one from easily seeing the hot surface, but also keeps the planet hot for a longer time. In terms of planetary mass, more massive planets are also easier to detect than smaller ones because of their larger emitting surface areas. We present preliminary calculations assuming a range of protoplanet masses (1-10 M_\earth), surface pressures (1-1000 bar), and atmospheric compositions, for molten planets with surface temperatures ranging from 1000 to 1800 K, in order to explore the diversity of emergent spectra that are detectable. While current 8- to 10-m class ground-based telescopes may detect hot protoplanets at wide orbital separations beyond 30 AU (if they exist), we will likely have to wait for next-generation extremely large telescopes or improved diffraction suppression techniques to find terrestrial planets in formation within several AU of their host stars.Comment: 28 pages, 6 figures, ApJ manuscript format, accepted into the Ap

Institutional repository promotion: Current practices and opinions in Texas academia

Version of article published in New Review of Academic LibrarianshipPromoting an institutional repository (IR) to both faculty and end-users can be challenging. We surveyed academic libraries with an IR in Texas, and asked both library administrators and IR managers about their efforts to promote and grow their IR in both size and downloads. In addition, we studied the websites of Association of Research Libraries and Texas academic libraries to see how other institutions place links to their IRs on the websites and name them in different ways to draw attention. We probed and discuss findings regarding active marketing to faculty in order to grow the IR size, and passive promotion efforts such as linking on the library website, custom branding to help people find and remember the IR, and so on. We found that most marketing was geared towards faculty, and little active marketing efforts were made to the end-users.Librar

Sources and sinks for atmospheric N2O

Observations of the temporal and spatial distribution of N2O in solution are not yet sufficient to permit quantitative assessment of the role of the ocean in the budget of atmospheric N2O. Consideration of the global nitrogen cycle suggests that the land should be the primary source of N2O. The gas is removed in the atmosphere by photolysis and by reaction with O(1D), and there may be additional sinks in the ocean

La satisfaction à l’égard de la naissance parmi les couples utilisant la chambre de naissance ou la chambre traditionnelle

Distribués au hasard, deux groupes de couples cnt été comparés quant à leur sentiment de satisfaction à l'égard de la naissance de leur enfant. Le groupe O.N. a fait usage de la chambre de naissance, tandis que le groupe C.T., a utilisé la chambre traditionnelle. Le sentiment de satisfaction a été mesuré au cours des trois jours suivant la naissance et trois mois plus tard, et les moyennes des réponses obtenues pour l'ensemble des mères et des pères (chacun ayant rempli individuellement le questionnaire), ont alors été comparées. Les résultats indiquent que, immédiatement après la naissance, les mères et les pères du groupe C.N. manifestent un degré de satisfaction plus élevé que celui des couples du groupe C.T., à l'égard du lieu où le travail et l'accouchement se sont déroulés. Les mères des deux groupes C.N. et C.T. sont également satisfaites de la durée de contact avec leur nourrisson après la naissance, tandis que les pères du groupe C.N. témoignent d'une satisfaction plus élevée que celle de leur conjointe, et que celle du groupe C.T. Trois mois plus tard, les résultats sont semblables sauf que les mères du groupe C.N. se déclarent plus satisfaites que celles du groupe C.T. de la durée de leur contact avec leur bébé après sa naissance.Following a random distribution, two groups of couples, users of the B.R. (birth room) and users of the T. R. (traditional room) were compared in terms of each partner's feeling of satisfaction in relation to the giving birth process. Statistical analysis of the means of the B.R. and T.R. fathers, of the B.R. and T.R. mothers, three days after delivery and three months later, yields the following results : following birth, both fathers and mothers of the B.R. group indicate a higher feeling of satisfaction than the T.R. mothers and fathers in relation to the environment. Mothers of the B.R. and T.R. are equally satisfied in relation to the amount of time spent with their infant, whereas fathers of the B. R. are more satisfied than their spouses and more satisfied than the T.R. fathers. Three months later, the only difference to these above-mentioned results, is the higher degree of satisfaction of B.R. mothers over T.R. mothers in relation to the length of contact with their infant right after birth

Sources and sinks for atmospheric N_2O

Observations of the temporal and spatial distribution of N_2O in solution are not yet sufficient to permit quantitative assessment of the role of the ocean in the budget of atmospheric N_2O. Consideration of the global nitrogen cycle suggests that the land should be the primary source of N_2O. The gas is removed in the atmosphere by photolysis and by reaction with O(¹D), and there may be additional sinks in the ocean

Atmospheric Flow Validation for Contaminant Transport

Presentation on atmospheric flow validation for contaminant transport.https://digitalcommons.usmalibrary.org/presentations/1015/thumbnail.jp

Thermodynamic Limits on Magnetodynamos in Rocky Exoplanets

To ascertain whether magnetic dynamos operate in rocky exoplanets more massive or hotter than the Earth, we developed a parametric model of a differentiated rocky planet and its thermal evolution. Our model reproduces the established properties of Earth's interior and magnetic field at the present time. When applied to Venus, assuming that planet lacks plate tectonics and has a dehydrated mantle with an elevated viscosity, the model shows that the dynamo shuts down or never operated. Our model predicts that at a fixed planet mass, dynamo history is sensitive to core size, but not to the initial inventory of long-lived, heat-producing radionuclides. It predicts that rocky planets larger than 2.5 Earth masses will not develop inner cores because the temperature-pressure slope of the iron solidus becomes flatter than that of the core adiabat. Instead, iron "snow" will condense near or at the top of these cores, and the net transfer of latent heat upwards will suppress convection and a dynamo. More massive planets can have anemic dynamos due to core cooling, but only if they have mobile lids (plate tectonics). The lifetime of these dynamos is shorter with increasing planet mass but longer with higher surface temperature. Massive Venus-like planets with stagnant lids and more viscous mantles will lack dynamos altogether. We identify two alternative sources of magnetic fields on rocky planets: eddy currents induced in the hot or molten upper layers of planets on very short period orbits, and dynamos in the ionic conducting layers of "ocean" planets with ~10% mass in an upper mantle of water (ice).Comment: Accepted to The Astrophysical Journa