Fr. Dominic, the bread monk, demonstrates how to tell if a loaf is fully baked using three different methods: baking time, gently tapping the crust of the loaf, and using a thermometer. Transcript: Hi, I'm Father Dominic the Bread Monk, author of How to Be a Breadhead and this is a Breadhead Minute.
The difference is that in a quasi-experiment the criterion for assignment is selected by the researcher, while in a natural experiment the assignment occurs 'naturally,' without the researcher's intervention. Quasi experiments have outcome measures, treatments, and experimental units, but do not use random assignment.
The first method was quasi-statically in a Universal testing Machine and the second two methods were variations on standard techniques used extensively in concrete research. A set of proto-cols and a test rig were developed to quasi-statically measure the Youngâs Modulus of masonry units. This test rig is based on the rig used to test concrete cylindrical specimens. Two dynamic methods are used to measure the Modulus of Elasticity of concrete cylindrical specimens.