Determination of spot weld quality Patent

Nondestructive radiographic tests of resistance weld

Weld joint strength and mechanical properties in 2219-T81 aluminum alloy

Plate and sheet were welded using automatic TIG /Tungsten Inert Gas/ weld techniques and manual repair weld techniques. Yield strength of 2219-T81 sheet and plate decreases significantly when welded

Preliminary design of two Space Shuttle fluid physics experiments

The mid-deck lockers of the STS and the requirements for operating an experiment in this region are described. The design of the surface tension induced convection and the free surface phenomenon experiments use a two locker volume with an experiment unique structure as a housing. A manual mode is developed for the Surface Tension Induced Convection experiment. The fluid is maintained in an accumulator pre-flight. To begin the experiment, a pressurized gas drives the fluid into the experiment container. The fluid is an inert silicone oil and the container material is selected to be comparable. A wound wire heater, located axisymmetrically above the fluid can deliver three wattages to a spot on the fluid surface. These wattages vary from 1-15 watts. Fluid flow is observed through the motion of particles in the fluid. A 5 mw He/Ne laser illuminates the container. Scattered light is recorded by a 35mm camera. The free surface phenomena experiment consists of a trapezoidal cell which is filled from the bottom. The fluid is photographed at high speed using a 35mm camera which incorporated the entire cell length in the field of view. The assembly can incorporate four cells in one flight. For each experiment, an electronics block diagram is provided. A control panel concept is given for the surface induced convection. Both experiments are within the mid-deck locker weight and c-g limits

Reagan, Bush and the Supreme Court

What may be the most significant achievement of the Reagan-Bush years is one we have only begun to appreciate: the radical revolution in the federal courts. After nearly three terms of conservative presidents bent on remaking the federal judiciary, the courts have been transformed. They are far more conservative, and, despite Administration rhetoric to the contrary, decidedly more activist

Trend assessment: Applications for hydrology and climate research

The assessment of trends in climatology and hydrology still is a matter of debate. Capturing typical properties of time series, like trends, is highly relevant for the discussion of potential impacts of global warming or flood occurrences. It provides indicators for the separation of anthropogenic signals and natural forcing factors by distinguishing between deterministic trends and stochastic variability. In this contribution river run-off data from gauges in Southern Germany are analysed regarding their trend behaviour by combining a deterministic trend component and a stochastic model part in a semi-parametric approach. In this way the trade-off between trend and autocorrelation structure can be considered explicitly. A test for a significant trend is introduced via three steps: First, a stochastic fractional ARIMA model, which is able to reproduce short-term as well as long-term correlations, is fitted to the empirical data. In a second step, wavelet analysis is used to separate the variability of small and large time-scales assuming that the trend component is part of the latter. Finally, a comparison of the overall variability to that restricted to small scales results in a test for a trend. The extraction of the large-scale behaviour by wavelet analysis provides a clue concerning the shape of the trend

Course Design in an Integrated First-Year Honors Sequence: Service Learning, Scaffolded Research, & Faculty Collaboration

Presentation given at Pre-ISSOTL Council on Undergraduate Research Symposium. In this presentation, participants will learn about a collaboration of two professors working with a cohort of 15 students in a year-long integrated sequence first-year Honors course. Both semesters of the course center around the theme of animals in the lives of children, families, and communities. In the first semester, the course focuses more narrowly on animal-assisted therapies. In the second semester, the course focuses more broadly on global and diversity issues. As part of this course, students must complete both 25 hours of service learning and a research project. Students complete the project in multiple scaffolded steps, first at an individual level (fall semester) by identifying a topic related to the course, finding five relevant research articles, and presenting one article to the class. At the end of the fall semester, students create poster presentations which incorporate all five articles. In the spring semester, students are placed into small groups around common topic themes and integrate their research findings and work toward a final product presenting multiple research studies in a meta-analysis style tabular format to the class. The primary objective of the session is to demonstrate a method to involve students in research through the curriculum, leading to analysis and integration of research findings. Participants will be involved by seeing examples of each step and by discussing the authors\u27 experiences in using this approach. Participants will learn about the benefits of: a) collaboration with another faculty member, b) working with the same cohort of students over two semesters, and c) the student outcomes when first-year are involved in scaffolded steps in understanding research