“A mechanistic model has the following advantages:
1. It contributes to our scientiﬁc understanding of the phenomenon under study.
2. It usually provides a better basis for extrapolation (at least to conditions worthy of further experimental investigation if not through the entire range of all input variables).
3. It tends to be parsimonious (i. e, frugal) in the use of parameters and to provide better estimates of the response”

— George E. P. Box

Source: Empirical Model-Building and Response Surfaces (1987), p. 13-14 as cited in: Andrew Odlyzko (2010) Social Networks and Mathematical Models http://www.dtc.umn.edu/~odlyzko/doc/ecra.westland.pdf Electronic Commerce Research and Applications 9(1): 26-28 (2010)

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George E. P. Box14

British statistician 1919–2013

Ralph Brazelton Peck (1912–2008) American civil engineer

as taken by Professor Ralph Peck's Legacy Website http://peck.geoengineer.org/words.html#

“Bayesian networks [is] a term coined in Pearl (1985) to emphasize three aspects: (1) the subjective nature of the input information; (2) the reliance on Bayes' conditioning as the basis of updating information; (3) the distinction between causal and evidential models of reasoning, a distinction that underscores Thomas Bayes' paper of 1763”

Judea Pearl (1936) Computer scientist

Source: Causality: Models, Reasoning, and Inference, 2000, p. 14

“In recent years, the studies of the effects of drugs on the behavior of animals have been playing an increasingly important role. Animal studies have been an advantage over studies with human subjects because better control of experimental variables and a possibility of using a wider range of the doses. It is also permissible to administer toxix compounds to animals. One can interfere surgically with various parts of the central nervous system while investigating the effects of the drugs. The whole field of comparative psychopharmacology has been recently reviewed”

Thaddus E. Weckowicz (1919–2000) Canadian psychologist

Weckowicz (1967) "Chapter VI - Animal Studies of Hallucinogenic Drugs" in: Abram Hoffer, Humphry Osmond (1967) The hallucinogens. p. 555

“Our first objective in undertaking the experimental program described here has been to gain some understanding of what goes on in long sequences of plays of Prisoner's Dilemma. We have attempted to gain this understanding by postulating a system going through a sequence of states and by attempting to formulate some mathematical models from which the dynamics of the system could be deduced. Once such a model is found, its parameters, properly interpreted, become the key terms in the emerging psychological theory. This strategy can be deemed successful, if the parameters so discovered are independent of the process itself, if they suggest further investigation, and if the further investigations, in turn, lead to a more inclusive theory.”

Anatol Rapoport (1911–2007) Russian-born American mathematical psychologist

Source: 1960s, Prisoner's dilemma: A study in conflict and cooperation (1965), p. 185

“As is used in connection with systems engineering, a model is a qualitative or quantitative representation of a process or endeavor that shows the effects of those factors which are significant for the purposes being considered. Modeling is the process of making a model. Although the model may not represent the actual phenomenon in all respects, it does describe the essential inputs, outputs, and internal characteristics, as well as provide an indication of environmental conditions similar to those of actual equipment.”

Harold Chestnut (1917–2001) American engineer

Source: Systems Engineering Tools, (1965), p. 108; As cited in: Alberto Ortiz (1992, p. 13)

“[This set of inputs [can be defined] as 1) input which is always the same or is of many types, 2) input which occurs periodically (or very infrequently), and 3) input which does or does not seek to destroy the system. Their rationale for developing the classification was to aid in the definition of steps to be followed in order to find the] solution of the problem of a large-scale or complex system.”

Robert E. Machol (1917–1998) American systems engineer

Source: System Engineering (1957), p. 302; As cited in: Thomas C. Ford (2008) Interoperability Measurement. p. 146

“The value of the intrinsic approach is especially apparent in considering 3-dimensional congruence spaces… The intrinsic geometry of such a space of curvature K provides formulae for the surface area S and the volume V of a "small sphere" of radius r, whose leading terms are 3)S = 4 \pi r^2 (1 - \frac{Kr^2}{3} + …),
V = \frac{4}{3} \pi r^3 (1 - \frac{Kr^2}{5} + …).”

Howard P. Robertson (1903–1961) American mathematician and physicist

Geometry as a Branch of Physics (1949)

“I do not in the least underestimate bisexuality... I expect it to provide all further enlightenment.”

Sigmund Freud (1856–1939) Austrian neurologist known as the founding father of psychoanalysis

Letter to Wilhelm Fliess (25 March 1898)
1890s

“Formulating and structuring a system provide methods for relating (1) what the system consists of in the mind of the persons or group desiring it; (2)what it means in terms of the persons or group designing and building it; and (3) in terms of the persons or groups operating, using and servicing it. They provide a set of "reasonable" parts and methods of relating them so that the many persons working on the system can understand the whole in sufficient detail for their purposes, and their particular parts in explicit detail so that they may contribute their best efforts to the extent required. A further purpose of system formulation is to recognize the magnitude of the job, including the possible pitfalls.”

Harold Chestnut (1917–2001) American engineer

Source: Systems Engineering Tools, (1965), Systems Engineering Methods (1967), p. 70; Rest of first paragraph of Ch.3

“All the light which is radiated… will, after it has traveled a distance r, lie on the surface of a sphere whose area S is given by the first of the formulae (3). And since the practical procedure… in determining d is equivalent to assuming that all this light lies on the surface of a Euclidean sphere of radius d, it follows…4 \pi d^2 = S = 4 \pi r^2 (1 - \frac{K r^2}{3} + …);whence, to our approximation 4)d = r (1- \frac{K r^2}{6} + …), or
r = d (1 + \frac{K d^2}{6} + …).</center”

Howard P. Robertson (1903–1961) American mathematician and physicist

Geometry as a Branch of Physics (1949)

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