Search results for ""author ann johnson""

In Hitting the Brakes, Ann Johnson illuminates the complex social, historical, and cultural dynamics of engineering design, in which knowledge communities come together to produce new products and knowledge. Using the development of antilock braking systems for passenger cars as a case study, Johnson shows that the path to invention is neither linear nor top-down, but highly complicated and unpredictable. Individuals, corporations, university research centers, and government organizations informally coalesce around a design problem that is continually refined and redefined as paths of development are proposed and discarded, participants come and go, and information circulates within the knowledge community. Detours, dead ends, and failures feed back into the developmental process, so that the end design represents the convergence of multiple, diverse streams of knowledge.The development of antilock braking systems (ABS) provides an ideal case study for examining the process of engineering design because it presented an array of common difficulties faced by engineers in research and development. ABS did not develop predictably. Research and development took place in both the public and private sectors and involved individuals working in different disciplines, languages, institutions, and corporations. Johnson traces ABS development from its first patents in the 1930s to the successful 1978 market introduction of integrated ABS by Daimler and Bosch. She examines how a knowledge community first formed around understanding the phenomenon of skidding, before it turned its attention to building instruments to measure, model, and prevent cars’ wheels from locking up. While corporations’ accounts of ABS development often present a simple linear story, Hitting the Brakes describes the full social and cognitive complexity and context of engineering design.

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A probing examination of the dynamic history of predictive methods and values in science and engineering that helps us better understand today’s cultures of prediction.The ability to make reliable predictions based on robust and replicable methods is a defining feature of the scientific endeavor, allowing engineers to determine whether a building will stand up or where a cannonball will strike. Cultures of Prediction, which bridges history and philosophy, uncovers the dynamic history of prediction in science and engineering over four centuries. Ann Johnson and Johannes Lenhard identify four different cultures, or modes, of prediction in the history of science and engineering: rational, empirical, iterative-numerical, and exploratory-iterative. They show how all four develop together and interact with one another while emphasizing that mathematization is not a single unitary process but one that has taken many forms.The story is not one of the triumph

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