The KnowledgeBank at OSU
(40.703 recursos)
Knowledge Bank contains collections of presentations, publications and reports related to Ohio State University.
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Virtual Reality Medical Training with Force Feedback - Moody, David
There is a critical need for employers to train employees quickly, safely, and effectively such that employees can retain skills and become proficient at their craft less expensively. Virtual reality has been shown to enable novel training solutions in many fields, such as: automotive industry, military, construction, and agriculture, among others. Training simulators have been developed that use virtual reality (VR) software in combination with force feedback devices composed of electric motors and cables. These systems allow users to interact with the computer and have force-feedback (haptic) devices which mimic the tactile sensation of the physical system being simulated. In...
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High Pressure Processing of Corn and Wheat Starch - King, Alexander J.
High hydrostatic pressure (HHP) has been investigated for food preservation as an alternative to thermal processing. HHP has been known to affect high molecular weight polymers causing phase change. Starch has been gelatinized on the order of 600-700MPa, at 25C. Gelatinized starch recrystallizes during storage affecting the texture and shelf life of food products. HHP was applied to corn and wheat starch to study the effects of storage temperature and time on recrystallization of starch in HHP induced starch gels and on the stability of aqueous suspensions of starch.
The effect of storage temperature on re-crystallization kinetics of gelatinized...
4.
Denitrification Potential of Log Jams on the Sandusky River, Ohio - Harley, Craig
Nitrogen in its oxidized form, Nitrate (NO3-), is considered a major pollutant of
rivers and lakes in the United States, particularly in areas of high agricultural use.
Nitrate is a nutrient that causes excess algal growth which can effectively
suffocate aquatic life through a high biological oxygen demand by bacteria that
decompose the algae. The effect of higher BODs can be to reduce oxygen to low
levels resulting in uninhabitable conditions for some aquatic life. In addition to
being detrimental to the health of water systems, NO3- in drinking water can have
adverse health effects on infants, a condition called Blue Baby Syndrome.
The only way to prevent...
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A User Study Contrasting 2D Unsteady Vector Field Visualization Techniques - Andrysco, Nathan
Scientific visualization is very popular today among many different fields. Its purpose is to take data and represent it visually so that a person can better understand what is occurring with the data. This idea can be as simple as a pie chart or as complex as drawing the beating human heart with data taken from a MRI scan.
One particular area of scientific visualization is the representation of flow data. Many methods have been researched and published on how to visualize different types of flow fields, but only a few papers have been published that have attempted to compare and...
6.
Control of flow from the exhaust of an aircraft engine - Murphy, Colleen E.
Enhanced mixing of the flow from a jet engine is of great interest for military purposes. Successful studies have been performed proving that improved mixing is possible in low speed and low Reynolds number flows. However, a lack of high bandwidth and high amplitude actuators has hindered the progress to control high speed and high Reynolds number flows. The recent development of localized arc filament plasma actuators has made it possible to control such flows. These actuators create electric discharges to manipulate the flow instabilities in the jet exhaust. For this research project, plasma actuators were used to control structures...
7.
Rheology of drag reducing surfactant systems - Severson, Kate
This paper explores the rheological behavior of drag reducing surfactant systems. It concentrates on the relationships between shear viscosity, shear rate, first normal stress difference, and shear stress.
8.
A Novel Method for Surveying Low Head Rivers and Streams - Wensink, Ryan
Measuring the geometry and the flow in river channels is an area of great interest in hydraulic engineering. Data describing these physical parameters has practical value in predicting flood levels and river restoration designs. Traditional survey techniques for mapping river bathymetry and determining flows are time consuming, imprecise and costly. Acoustic Doppler technology has been used for measuring water velocity for the past 25 years. These systems have primarily been utilized to study the currents and wave patterns of oceans and estuaries.
Further advancements through the 1990s have led to acoustic Doppler profiling systems capable of obtaining high-resolution data in...
9.
Design of a sensor based data collection system for lower limb prosthetic gait analysis - Bulea, Thomas C.
The primary function of a lower limb prosthetic device is restoration of ambulation. Proper alignment the correct spatial relationship between artificial sockets and the natural limb is paramount to attain an efficient, comfortable gait with a desired loading pattern on the residual leg. Despite advances in prosthetic device design, the clinical alignment process remains subjective and nonsystematic due to a lack of an inexpensive, effective method for quantification of the amputee gait. Gait laboratories provide accurate data for gait monitoring; however cost and lab availability prohibit most patients from this benefit. Economic concerns aside, gait labs do not...
10.
Novel Techniques for Interfacial Tension and Contact Angle Measurements in Polymer/CO2 systems - Baird, Russell
The use of supercritical CO2 is a leading candidate as a replacement for current foaming agents as they are phased out by the Montreal Protocol. Numerous studies have found that adding CO2 to polymer melts lowers the viscosity and enhances many foam properties. Despite this, there are many obstacles that need to be cleared, as the traditional foaming agents make much higher quality foams than are currently being made using CO2. Because of the necessity to create these higher quality foams, work must be done in order to attempt to improve the foams. This work is based on nucleation theory...
11.
Creation Of A Linear Optimization File Format - Cavolo, Richard A. Jr.
Every year, over one hundred Industrial and Systems Engineering at Ohio State students take courses that teach them the basics of linear and integer programming. Currently, students in these courses are taught to use a built in Excel solver or CPLEX using the LP or MPS file formats. These formats make it frustrating for students to create, modify, and debug mathematical programs. This frustration can prevent students from learning. This paper suggests the use of a high-level Excel specification format that is easier to use and more powerful than the formats that are currently taught. An Excel add-in was created...
12.
A Rheokinetic Study of Free Radical Polymeriztaion of Polystyrene/Graphite Systems Performed with a Couette Rheometer - Sparks, Stefanie
This thesis attempts to introduce the concepts behind the research field of rheokinetics. Experiments were conducted to intensify the study of these concepts and to verify or challenge various assumptions that accompany work in this field. The experiments involved the use of a Physica Modular Compact Rheometer Model 500 to measure the viscosity of a polymer system during polymerization. All polymerizations were carried out at 85?C. Styrene monomer and a benzoyl peroxide initiator were used in all reactions. The composition of the polymer system was varied to include either polystyrene powder and/or graphite nano-particles. The shear rate was varied as...
13.
Feasibility and Design Study of a Drive Box for Application in a Tandem Rear Axle Light Truck - Batdorf, Scott
Significant improvements in load handling can be made to light trucks with the application of a tandem rear suspension. Most current concepts involve two complete axle assemblies with all the associated drive components. This concept is good, but an alternative method of transferring power to the rear most axle that is discussed in this paper provides additional benefits. This research effort resulted in a preliminary design for a drive box that will allow the driver to disengage the rear most axle when extra traction is not required. By disengaging part of the drive-line, there is an increase in system efficiency...
15.
Study of drag reduction by zwitterionic and non-ionic surfactants in low temperature ethylene glycol/water recirculation systems - Chapman, Brian G.
District cooling systems are an efficient way to remove heat from buildings and are being utilized around the world. Although they typically use water chilled at a central station to 5?C as the cooling fluid, adding ethylene glycol to the water allows the fluid to be chilled to 5?C, which will increase the cooling capacity per unit mass of fluid circulated and thus reduce the amount of cooling fluid required, thus reducing pumping energy requirements significantly. Through the addition of surfactants into these ethylene glycol/water systems, the drag can be further reduced in the turbulent flow through the pipes, reducing...
16.
FDTD Antenna Modeling for Ultrawideband Electromagnetic Remote Sensing - El Hage Ghonein, Sleiman
This paper is intended to explain and present the results for the research conducted on time reversal phenomenon for electromagnetic waves in presence of an array of three bowtie antennas. The research was conducted by software using Finite-Difference Time- Domain technique.
17.
Evaluation of Wave-Current Bottom Boundary Layer Models - Nichols, Claire S.
Widespread beach erosion is threatening American coastal environments making coastal engineering, especially sediment transport, a rising field of interest. An improved understanding of sediment transport will help us to combat coastal threats such as beach erosion, harbor siltation, submerged object scour, and coastal structure failure. In coastal environments sediment is transported by both currents and waves. This environment is complicated because waves and currents interact in a way that does not allow for a linear sum of their separate behaviors.
In this effort, the wave-current bottom boundary layer physics are examined with several applied engineering models and with a more...
18.
DESIGN AND IMPLEMETATION OF NETWORK LOCALIZATION SERVICE USING ANGLE-INDEXED SIGNAL STRENGTH MEASUREMENTS - Kalash, Abdul Rahman
The recent technological developments in low-power electronics and wireless communication have increased the use of ad hoc wireless sensor networks for environmental monitoring and security applications. A typical network is a randomly distributed collection of scores of low-power wireless sensor nodes. Network localization is the process of estimating the location of each sensor in the network. Network localization is an imperative capability for the effective operation of wireless sensor networks. In this research project we explore an innovative approach to localization that uses an array of directional antennas, together with a nodes radio communications, to sense the bearing and distance...
19.
Analysis of Pharmaceutical/Polymer Solid Dispersions Produced by Supercritical Carbon Dioxide-Assisted Techniques - Seibold, Maren
In the pharmaceutical industry, the production of solid dispersions is generally accepted as a method to enhance the oral bioavailability of drugs with low aqueous solubility. Two processes commonly employed to create solid dispersions are examined in this research. The first technique dissolves the drug and carrier in a common organic solvent and is followed by a solvent-removal operation. The second method processes both the drug and polymer in a high-pressure mixer with supercritical carbon dioxide. This method is intended to simulate the temperature and pressure conditions of carbon dioxide-assisted hot-melt extrusion.
Organic solvent-based solid dispersion formulation techniques are accompanied...
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