Compressor blade setting angle accuracy study, volume 1

The aerodynamic test of a small, single stage, highly loaded, axial flow transonic compressor is covered. The stage was modified by fabricating a 24 blade rotor with mis-set blades in a repeating pattern - two degrees closed from nominal, two degrees open from nominal and nominal. The unit was instrumented to determine overall performance and average blade element data. High-response, dynamic pressure probes were installed to record pressure patterns at selected points in the flowpath. Testing was conducted at speeds from 70 to 94% of design equivalent speed with a conventional casing and also with circumferential grooves over the rotor tip. Testing indicated severe performance penalties were incurred as a result of the mis-set blading. Lower flow, pressure ratio, and efficiency were observed for the stage with or without casing treatment. Periodic pressure variations were detected at every location where high response pressure sensors were located and were directly related to blading geometry

MiSFIT: Mining Software Fault Information and Types

As software becomes more important to society, the number, age, and complexity of systems grow. Software organizations require continuous process improvement to maintain the reliability, security, and quality of these software systems. Software organizations can utilize data from manual fault classification to meet their process improvement needs, but organizations lack the expertise or resources to implement them correctly. This dissertation addresses the need for the automation of software fault classification. Validation results show that automated fault classification, as implemented in the MiSFIT tool, can group faults of similar nature. The resulting classifications result in good agreement for common software faults with no manual effort. To evaluate the method and tool, I develop and apply an extended change taxonomy to classify the source code changes that repaired software faults from an open source project. MiSFIT clusters the faults based on the changes. I manually inspect a random sample of faults from each cluster to validate the results. The automatically classified faults are used to analyze the evolution of a software application over seven major releases. The contributions of this dissertation are an extended change taxonomy for software fault analysis, a method to cluster faults by the syntax of the repair, empirical evidence that fault distribution varies according to the purpose of the module, and the identification of project-specific trends from the analysis of the changes

Fiber optic pressure sensors in skin-friction measurements

Fiber optic lever pressure sensors intended for use in a low speed wind tunnel environment were designed, constructed and tested for the measurement of normal and shear displacements associated with the pressures acting on a flat aluminum plate. On-site tests performed along with several static and dynamic measurements made have established that, with proper modifications and improvements, the design concepts are acceptable and can be utilized for their intended use. Several elastomers were investigated for use in sensors and for their incorporation into these sensors. Design and assembly techniques for probes and complete sensors were developed

Small axial compressor technology, volume 1

A scaled single-stage, highly-loaded, axial-flow transonic compressor was tested at speeds from 70 to 110% design equivalent speed to evaluate the effects of scaling compromises and the individual and combined effects of rotor tip running clearance and rotor shroud casing treatment on the overall and blade element performance. At design speed and 1% tip clearance the stage demonstrated an efficiency of 83.2% at 96.4% design flow and a pressure ratio of 1.865. Casing treatment increased design speed surge margin 2.0 points to 12.8%. Overall performance was essentially unchanged. An increase in rotor running clearance to 2.2%, with smooth casing, reduced design speed peak efficiency 5.7 points, flow by 7.4%, pressure ratio to 1.740, and surge margin to 5.4%. Reinstalling casing treatment regained 3.5 points in design speed peak efficiency, 4.7% flow, increased pressure ratio to 1.800 and surge margin to 8.7%

Compressor blade setting angle accuracy study. Volume 2: Data compilation

For abstract, see N77-11046

Structure of Charged Argon Clusters Formed in a Free Jet Expansion

We describe measurements of the mass spectrum of charged argon clusters generated in a low-temperature free jet expansion. It contains detailed intensity variations which can be understood in terms of a simplified competing-lattice model of charged-cluster structure

Small axial compressor technology, volume 2

Complete computer printout data are presented and supporting tests discussed in Volume I

Late Miocene to early Pliocene biofacies of Wanganui and Taranaki Basins, New Zealand: Applications to paleoenvironmental and sequence stratigraphic analysis

The Matemateaonga Formation is late Miocene to early Pliocene (upper Tongaporutuan to lower Opoitian New Zealand Stages) in age. The formation comprises chiefly shellbeds, siliciclastic sandstone, and siltstone units and to a lesser extent non-marine and shallow marine conglomerate and rare paralic facies. The Matemateaonga Formation accumulated chiefly in shelf paleoenvironments during basement onlap and progradation of a late Miocene to early Pliocene continental margin wedge in the Wanganui and Taranaki Basins. The formation is strongly cyclothemic, being characterised by recurrent vertically stacked facies successions, bounded by sequence boundaries. These facies accumulated in a range of shoreface to mid-outer shelf paleoenvironments during conditions of successively oscillating sea level. This sequential repetition of facies and the biofacies they enclose are the result of sixth-order glacio-eustatic cyclicity. Macrofaunal associations have been identified from statistical analysis of macrofossil occurrences collected from multiple sequences. Each association is restricted to particular lithofacies and stratal positions and shows a consistent order and/or position within the sequences. This pattern of temporal paleoecologic change appears to be the result of lateral, facies-related shifting of broad biofacies belts, or habitat-tracking, in response to fluctuations of relative sea level, sediment flux, and other associated paleoenvironmental variables. The associations also show strong similarity in terms of their generic composition to biofacies identified in younger sedimentary strata and the modern marine benthic environment in New Zealand

Relational Contracting In A Digital Age; Panel Discussion

If, as it has sometimes been argued, changes in contract rules and theory are strongly affected by changes in economic conditions, we should note that the world has changed a good deal since the early 1960s when relational contract theory began to bloom. The economic world of 2004 is very different from the world of 1964. Modern relational contract theory was born about the same time as its great theoretical competitor, the rational choice approach of the legal economists. It came before the vast changes wrought by the information revolution and the increased globalization of the economy. What has relational theory taught us over the past forty years? How has it changed and adapted in light of those great economic changes? Where is it going in the future? Those were the general topics at a panel discussion which took place June 8, 2004, at the Oxstalls campus of the University of Gloucestershire in Gloucester, England. It was part of a conference entitled, The Common Law of Contracts as a World Force in Two Ages of Revolution, which marked the 150th anniversary of one of the most famous contracts cases of all time, Hadley v. Baxendale, and is the theme of the present Symposium. The Conference\u27s object was to explore how the common law adapts to and influences the kind of revolutionary changes that have swept over our society in the past forty years, and which swept over England in the forty years before Hadley v. Baxendale

Home Modification and Adaptation Educational Seminar for Individuals with Parkinson Disease to Reduce Risk of Falls

Indiana University Purdue University IndianapolisClients with Parkinson’s disease have high rates of falls within their homes due to the movement disorders typically associated with the disease. This study used quantitative methods to determine the program evaluation of educational seminars on home modifications and adaptations to reduce the risk of falls in Parkinson’s disease (PD) clients. Two educational seminars were given to PD clients and caregivers on how to make modifications and adaptations to their homes and included resources for where to find adaptive equipment and services for providing installations and modifications. Data was collected through pre and post-surveys and analyzed using an independent samples t-test analysis. There was a significant difference in the knowledge of how to make living spaces, bathrooms, and bedrooms safer to reduce the risk of falls in the home. There was also a significant difference in the overall satisfaction of participants’ knowledge on how to complete home modifications and adaptations and for their knowledge on resources/places to find adaptive equipment. Recommendations included continuing to provide home modification education to people with Parkinson’s to ensure further safety and help reduce the risk of falls within the home. The results propose that PD clients are not receiving education on home modifications at rates that would be of benefit to them.Occupational Therap