“The term closed loop-learning process refers to the idea that one learns by determining what s desired and comparing what is actually taking place as measured at the process and feedback for comparison. The difference between what is desired and what is taking place provides an error indication which is used to develop a signal to the process being controlled.”
Harold Chestnut (1984) in: Lawrence P. Grayson, Joseph M. Biedenbach eds. Engineering--images for the future": proceedings, 1983 Annual Conference. p. 923
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Harold Chestnut 27
American engineer 1917–2001Related quotes

Talks & Dialogues, Saanen (9 July1967) http://www.jkrishnamurti.com/krishnamurti-teachings/view-text.php?tid=41&chid=1, p. 86
1960s
Context: Throughout life, from childhood, from school until we die, we are taught to compare ourselves with another; yet when I compare myself with another I am destroying myself. In a school, in an ordinary school where there are a lot of boys, when one boy is compared with another who is very clever, who is the head of the class, what is actually taking place? You are destroying the boy. That’s what we are doing throughout life. Now, can I live without comparison — without comparison with anybody? This means there is no high, no low — there is not the one who is superior and the other who is inferior. You are actually what you are and to understand what you are, this process of comparison must come to an end. If I am always comparing myself with some saint or some teacher, some businessman, writer, poet, and all the rest, what has happened to me — what have I done? I only compare in order to gain, in order to achieve, in order to become — but when I don’t compare I am beginning to understand what I am. Beginning to understand what I am is far more fascinating, far more interesting; it goes beyond all this stupid comparison.
Introduction
The Common Background of Greek and Hebrew Civilizations (1965 [1962])

Source: Website of Mehr News Agency, 2017 http://www.mehrnews.com/news/3954046/%D9%BE%D8%B0%DB%8C%D8%B1%D8%B4-%D8%AE%D8%B7%D8%A7-%D8%AF%D8%B1-%D8%AA%D8%B1%D8%A8%DB%8C%D8%AA-%D8%A7%D9%86%D8%B3%D8%A7%D9%86-%D8%B6%D8%B1%D9%88%D8%B1%DB%8C-%D8%A7%D8%B3%D8%AA

De Colores Means All of Us: Latina Views for a Multi-Colored Century (2017)

Source: The Concept and the Role of the Model in Mathematics and Natural and Social Sciences (1961), p. ix

“What’s important is not just to develop the technology; it’s to develop the processes.”
Source: mitcet http://www.edpath.com/mitcet.htm
The Farther Reaches of Human Nature (1971).
1970s and later