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This research paper was written as a requirement of LA 514 The Professional Practice of Landscape Architecture, Master of Landscape Architecture Program, Illinois Institute of Technology for Professor Mary Pat Mattson. In the course of my exploration, I realized that Miller’s design of Green school yards in San Francisco were a highly collaborative effort with schools, communities and organizations. The green schoolyards, including edible gardens, not only extend the outdoor classroom which has become more and more popular in the world, but also provide educational purpose, physical training, awareness of food resources and fresh food resources. This paper is going to figure out the following questions: what is the designer’s responsibility and role in the design process? How does the green schoolyard design influence the work? How is the collaboration between community, design team, school and Government? What are proposed politics and culture?

A system based on two microcomputers was developed to increase the precision and repeatibility of ultrasonic measurements. The first micro‐computer controls the mechanical movements (resolution: 40 μm in linear distance; 1/40° in angle) and data collection, the second one is used for data processing and interactive data presentation. The system was applied to measure leaky Rayleigh and leaky Lamb wave velocities from critical angles with an increased precision in different materials. A method was also developed to measure the loss of leaky Rayleigh waves from several materials in water. This system has been especially advantageously used where a large number of inhomogeneities are the sources of the ultrasonic scattering, i.e., grains, pores. Examples will be given to present the various displays of complex measured data.