Index Catalog // ScholarsArchive@OSU

Development of acoustic emissions testing procedures applicable to conventionally reinforced concrete deck girder bridges subjected to diagonal tension cracking

Creator:: Lovejoy, Steven C.
Abstract:: A need exists to develop a non-destructive testing technique that can identify the formation and propagation of diagonal tension cracks in conventionally steel reinforced concrete deck girder (RCDG) highway bridges in the State of Oregon. Such a technique could be included into a structural health monitoring (SHM) system installed on...
Resource Type:: Dissertation

Microscale thermal management using membrane vapor extraction

Creator:: Apreotesi, Mario A.
Abstract:: With the miniaturization of microelectronics and increase of processor speeds in the last few decades, thermal management is drastically affecting overall packaging and system capabilities. Due to the special needs introduced, research focusing on microscale cooling has increased. This study combines the positive characteristics of single- and two-phase flows in...
Resource Type:: Honors College Thesis
Full Text:: NOMENCLATURE Symbols A AC B cp d D e E f g h H I k K L m m& n N Nu p P Pr

Automating aquatic insect identification through pattern recognition

Creator:: Thomas, Joshua K.
Abstract:: Aquatic insect population counts can be a good indicator of the health, or water quality, of rivers and streams. Stoneflies (Plecoptera) are particularly susceptible to pollution in streams. However, today’s current method for obtaining these population counts requires biologists to examine individual specimens under a microscope for identification to the...
Resource Type:: Masters Thesis

Model predictive control for sagittal plane locomotion

Creator:: Maunder, Cary R.
Abstract:: A distinct characteristic of legged locomotion is its periodic nature. This periodic motion, in the form of a periodic orbit, has been the target of many walking and running control strategies. The spring loaded inverted pendulum (SLIP) has become a popular model of sagittal plane locomotion, exhibiting behavior characteristic of...
Resource Type:: Masters Thesis
Full Text:: yield ( )' , , ,f o t t J H t y u y dtλ λ= −  ∫ & , (2.12) where H is called the Hamiltonian

Human gait analysis by gait pattern measurement and forward dynamic model combined with non linear feedback control

Creator:: Ko, Seung-uk
Abstract:: Normal gait of human is believed to be an adapted motor control result of optimal behavior of individual. Normal gait would be altered by aging or injury without being perceived. Subtle changes in gait which is not easy to detect, can cause many serious problems including joint pains and even...
Resource Type:: Dissertation
Full Text:: ., Vainio, J., Aho, H., et al. (1999). Majority of hip fractures occur as a result of a fall and impact on

Effects of a thin, flexible nozzle on droplet formation and impingement

Creator:: Hawke, Shane R.
Abstract:: The droplet formation process in the vicinity of the nozzle exit and the behavior of a spreading droplet during impingement on a smooth glass surface were studied. Two nozzle geometries were tested. The first case was a stiff stainless steel nozzle plate 0.787 mm thick. The second case was a...
Resource Type:: Masters Thesis
Full Text:: -peak voltage h plate thickness w deflection of a flat plate Oh Ohnesorge number, D μ ρσ

Optimal soaring by a small autonomous glider

Creator:: Kyle, Jason A.
Abstract:: Extending the flight time of an autonomous unmanned air vehicle by soaring is considered. A suboptimal controller is developed and successful static soaring is demonstrated with a 6 degree of freedom glider model. Altitude gain rates of between ¼ and ½ m/s are achieved with this simple implementation. A hybrid...
Resource Type:: Dissertation
Full Text:: ( ) ( ) T T T J e t Qe t dτ τ τ= + +∫ (26) where Q is a diagonal, positive definite weighting matrix

Simulation-based micro-scale system modeling and design optimization of a portable absorption cycle cooling system (tactical energy system) under uncertainty

Creator:: Shielee, David
Abstract:: Product design is often driven by customer needs and desires. In this case the customer is the US military, and the desire is to have a cooling unit small enough and light enough to incorporate into hazard suits for use in desert combat. The Micro technology-based Energy and Chemical Systems...
Resource Type:: Masters Thesis

Design and preliminary characterization of thermally-actuated pumps utilizing Marangoni and Leidenfrost effects

Creator:: Sedler, Stephen Joseph
Abstract:: Design and preliminarily characterization of two thermally-actuated pumps is presented in this thesis. The unique feature of both pumps is the presence of periodic asymmetrical structures on the channel walls. Two heat transfer effects are used with surface asymmetry to generate forces that drive the fluid in a preferential direction...
Resource Type:: Honors College Thesis

Evaluation of total hip arthroplasty research in the US and Europe

Creator:: Simmons, Marcy J.
Abstract:: Background: Hip replacements are considered routine operations which improve the quality of life in patients by reducing pain and restoring function. There are many variations in prostheses with varying benefits and disadvantages. Methods: Literature from the United States and Europe was collected on total hip replacements between 2001 and the...
Resource Type:: Research Paper
Full Text:: Simmons 1 Evaluation of Total Hip Arthroplasty Research in the US and Europe by Marcy J

ScholarsArchive@OSU

Development of acoustic emissions testing procedures applicable to conventionally reinforced concrete deck girder bridges subjected to diagonal tension cracking

Microscale thermal management using membrane vapor extraction

Automating aquatic insect identification through pattern recognition

Model predictive control for sagittal plane locomotion

Human gait analysis by gait pattern measurement and forward dynamic model combined with non linear feedback control

Effects of a thin, flexible nozzle on droplet formation and impingement

Optimal soaring by a small autonomous glider

Simulation-based micro-scale system modeling and design optimization of a portable absorption cycle cooling system (tactical energy system) under uncertainty

Design and preliminary characterization of thermally-actuated pumps utilizing Marangoni and Leidenfrost effects

Evaluation of total hip arthroplasty research in the US and Europe

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