Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 12 of 12 for “"valving"”.
-
Strategic valve locations in a water distribution system
… consideration for placing valves is a strategic valving rule, namely N and (N-1) valving rules. Using a formulation for node reliability in terms of failing valves, the reliability difference between the two valving rules is evaluated. We also employ a mixed N and (N-1) valving rule. Another …
-
Novel methods for microfluidic mixing and control
… issues associated with microscale mixing and valving. We present mixing and valving techniques that utilize simplified and inexpensive techniques. The first technique addresses issues associated with microscale mixing. Exercising control over animal locomotion is well known in the macro world …
-
Physics and Applications of a PDMS Based Centrifugal Microfluidic System
… force and the last one is a membrane valve. All valving system demonstrate good control of the fluid movement. The latter two valves are capable of sequential control. It proves that the flyball governor system is very compatible with centrifugal fluidic technologies. The major advantage of this …
-
Increasing the efficiency of cam follower systems through energy recovery
… reciprocating motion. Cams are well known for valving in internal combustion engines but are commonly utilized in industrial processes including stamping, food processing, and textile manufacturing. Most systems use an input torque in order to produce a linear force during the rise portion and …
-
Microfluidic Flow Creation in the Insect Respiratory System
… how tracheal tube compression, spiracular valving, and abdominal pumping coordinate to produce unidirectional flow during active respiration. In Chapter Two, we altered the environmental conditions by exposing the animals to various levels of hypoxia and hyperoxia, then examined how they …
-
Fluid flow and deformation history of the Denver basin, CO region: fluid inclusions, U-Pb geochronology and isotope geochemistry of calcite-filled fracture cements in the Niobrara Formation
… between ~81-65 Ma and was attributed to tectonic valving of deeper radiogenic-Sr-rich-aquifers during wrench fault activity and Rocky Mountain uplift. Upward vertical migration of hydrothermal fluids may be the most suitable explanation of the Wattenberg field thermal anomaly. These results …
-
A method for direct coupling of supercritical fluid extraction and supercritical fluid chromatography with application to the analysis of nonvolatile coal derived products
… dissolution of the sample is done in a liquid. A valving scheme is described to accomplish this task and is evaluated for use with several different samples, including fuels and food products, with direct comparisons made between traditional sampling and direct on-line extraction. In most cases, …
-
Influencing Oral-nasal Balance in Speech and Song
Oral-nasal balance is dependent on the valving of the velopharyngeal sphincter. This dissertation examined the control and modification of oral-nasal balance in speech and song. Literature was reviewed from the fields of speech science and singing voice pedagogy, which motivated three projects. The …
-
Diagenetic controls on porosity, thermal history, and hydrocarbons in the Wolfcamp A, eastern Midland Basin, Texas
… of the Th record indicate tectonic valving of hydrothermal fluids. Relatively non-radiogenic 87Sr/86Sr for high temperature cements (0.707464 – 0.707846) suggest a fluid origin from a sedimentary basin rather than basement. The most likely source for the hydrothermal fluids is the …
-
Direct ink writing of microvascular networks
… facilitate their patterning, including pressure valving, dual ink printing, and dynamic pressure variation to allow tunable control of ink deposition. The hydraulic conductance is measured using a high pressure flow meter as a function of network design. For a constant vascular volume and areal …
-
Investigation into continuous spray and metered spray using compressed gas propellant
… lower than the hydrocarbon propellants. The new valving arrangement which was used in this study, is however introducing the propellant into the valve stem to create ‘bubbly flow’ thus increasing the turbulence prior to the atomiser insert of the actuator. The domestic aerosol products are …