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Analysis and optimization of electroformed dendritic structures as enhanced heat transfer surfaces
(University of Missouri--Columbia, 2009)
Over the past several years, the use of passive cooling devices in electronics such as heat pipes and vapor chambers has increased. Due to their more widespread use, these technologies have a high demand for more adaptable ...
Dynamic study of the piezo-driven pipettes in intracytoplasmic sperm injection
(University of Missouri--Columbia, 2008)
[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT REQUEST OF AUTHOR.] Intracytoplasmic Sperm Injection (ICSI) is regarded as a critical assisted reproductive technology (ART) procedure in which a single spermatozoon is ...
A development of the motile sperm sorting microfluidic devices
(University of Missouri--Columbia, 2007)
The objectives of this research are developing and improving an inexpensive and convenient microfluidic device to apply to sperm cell sorting. Based on well known soft-lithography fabrication method which contains rapid ...
Nonlinear control and active damping of a forced-feedback metering poppet valve
(University of Missouri--Columbia, 2007)
For a metering poppet valve which was developed at the University of Missouri (MU valve), the valve can be configured for performance at the cost of stability. It is desirable to achieve both performance and stability using ...
Investigation of static interfacial fracture in orthotropic-orthotropic composite bimaterials using photoelasticity
(University of Missouri--Columbia, 2009)
The effects of static Mode I (opening mode) and mixed-mode (both Mode I - opening mode and Mode II - shear mode present) loading on orthotropic-orthotropic bimaterial interface cracks and isotropic-orthotropic bimaterial ...
Development of a two-dimensional human thermal model for EVA applications
(University of Missouri-Columbia, 2002)
The human thermoregulatory system, with its active and passive components, is difficult to model due to nonlinearities, complex interactions, and a lack of understanding of many of the active thermoregulatory mechanisms. ...
Experimental investigation of a novel disc oscillating heat pipe and heat conduction effect on the startup of oscillating motion
(University of Missouri--Columbia, 2009)
[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT REQUEST OF AUTHOR.] A new disc oscillating heat pipe has been developed and tested for use in high heat flux applications with a localized heat source. The results show ...
Thermal-mechanical analysis of targets for high volume production of molybdenum-99 using low-enriched uranium
(University of Missouri--Columbia, 2009)
Techenetium-99m is diagnostic radioactive medical isotope that is currently used 30,000 times a day in the United States. All supplies of techenetium-99m's parent isotope molybdenum-99 currently originate from nuclear ...
Modeling, verification, optimal design of nonlinear valve spring
(University of Missouri--Columbia, 2009)
The objective of this study is the optimal design of helical spring based on dynamic criteria. The most important dynamic performance criterion of a helical spring is the resonance behavior, including dynamic stress, coil ...
Modeling of thin film evaporation heat transfer and experimental investigation of miniature heat pipes
(University of Missouri--Columbia, 2008)
The heat pipe, as one of the most efficient heat transport devices, is a peerless choice in the electronic cooling field. In order to better understand the heat transfer mechanisms of the heat pipe, a heat transfer model, ...
Compact oscillating heat pipe and development of fuzzy copper or wicking structures
(University of Missouri--Columbia, 2008)
A central processing units (CPU) calculation speed is limited by the heat it produces. As the number of transistors and the clock speed of CPUs increase they become more powerful, but they also generate more heat which ...
Optimization of electromagnetic acoustic transducers for nondestructive evaluation of concrete structures
(University of Missouri--Columbia, 2008)
There are more than 130,000 prestressed concrete bridges in the United States with about 37,000 bridges being more than 30 years old. Prestressing steel strands are an important construction element used in these bridges ...
Experimental and numerical investigation of subcritical bifurcations in milling
(University of Missouri--Columbia, 2007)
The focus of the current thesis is an experimental and numerical investigation of subcritical bifurcations in milling. More specifically, several researchers have reported results indicating that the secondary Hopf ...
Elastic property prediction of long fiber composites using a uniform mesh finite element method
(University of Missouri--Columbia, 2008)
This research numerically evaluates elastic non-isotropic material properties of fiber reinforced composite materials. Calculations are performed with a finite element mesh composed of a uniform array of three dimensional ...
Advanced guidance algorithms for the Ares V cargo launch vehicle
(University of Missouri--Columbia, 2008)
Launch ascent guidance is an area that routinely involves applications of optimization tools and optimal control theory. The vacuum ascent trajectory problem has been formulated as a two-point boundary-value problem with ...
Thermal-hydraulic optimization for high production of low-enriched uranium based molybdenum-99
(University of Missouri--Columbia, 2009)
Globally, more than 20 million samples of technetium-99 are used annually to diagnose many different forms of cancer. Despite this, there are only four main nuclear reactors worldwide that produce molybdenum-99, the parent ...
Uneven turns oscillating heat pipes
(University of Missouri--Columbia, 2009)
An experimental investigation on oscillating heat pipes with uneven turns was conducted in order to determine the effect of short turns on the heat transport capability. The shorter turns do not go through both the evaporating ...
Force control of a hydraulic servo system
(University of Missouri--Columbia, 2009)
The objective of this thesis is to model a hydraulic servo system using force control and then improve upon the performance of the model/system through feedback control design. The hydraulic system is first constructed and ...
Helical tool geometry in stability predictions and dynamic modeling of milling
(University of Missouri--Columbia, 2007)
The temporal finite element analysis (TFEA) method has been used in several publications to analyze interrupted machining dynamics. In this work, a higher order hp-version TFEA method will be presented which offers the ...
Rapid industrial furnace thermal modeling for improved fuel efficiency
(University of Missouri--Columbia, 2007)
The development and verification of an innovative modeling technique for industrial gas fired glass melting furnaces will be discussed. Rapid and accurate modeling of industrial furnaces is needed for the development of ...