Nuclear chemistry and geochemistry research. Carnegie Institute of Technology and Carnegie--Mellon University. Summary report

Abstract

was a volunteer research worker during the summer of 1972. F. Supporting PersonnelPersons employed or supported by the Project who performed essential services while not actually participating in the research included health physicists, machinists, glassblowers, general laborers, secretaries, stenographers, and clerks.The secretaries who were most closely involved in the handling of technical correspondence and typing of technical reports and papers were:

The Cornú Spiral as a Golden Mean Construction

“…The Fresnel Integrals, defined as 1,2) CðuÞ ¼ were discovered in the context of the physics of diffraction and were later found to have important applications in a variety of problems, ranging from physical optics to nonlinear dynamics. [3][4][5][6] In the specific case of physical optics, there exists a beautiful geometrical construction related to these important mathematical objects, namely, the Cornu ´spiral [7][8][9] named after the French physicist Marie Alfred Cornu ´, which arises from the plot of CðuÞ vs SðuÞ and which can be used to graphically calculate the diffraction characteristics of an edge (i.e., half plane). This curve, also known as the clothoid or Euler spiral, was first studied by Johann Bernoulli ca.…”

“…1690 and has some interesting mathematical properties, such as its curvature, that varies linearly with the parameter s and it is thus the simplest example of a curve that can be constructed solely from its curvature. Recently, clothoids have been practically used for robotic control 8) and even for designing roller coasters. 9) Conversely, among the enigmatic numbers that Nature seems to enjoy, the golden mean, ¼ ð1 þ ffiffi ffi 5 p Þ=2 ¼ 1:618, attracted a great deal of attention from the ancient greeks, who even attributed a divine origin to such geometrical relationships, present in a wide variety of natural objects, 10,11) from seashells to sunflowers, fruits, patterns in the skins of animals and even human faces.…”

Neural Network Discrimination of Heavy Flavor Jets: A Survey

“…The two-spirals problem of Fig. 4 provides a classification example that, while trivial for L VQTC, has found no solution to date with standard BP [12]. Only a solution with a 5 modified feed-forward net has been found, in which each unit receives incoming connections from every unit in every earlier layer, not just from the immediately preceding layer [13].…”

More Than Just Nice to Have: Engineering Managers’ Perceptions about the Role of Adaptability in Hiring and Promotion Decisions

“…The project uses a sequential mixed-methods research approach to systematically investigate adaptability in engineering. The electronics, semiconductor, and medical device industries, chosen for their rapidly evolving product life cycles, regulatory processes, and consumer demands [4]- [6], serve as the project's context. The first phase of the project uses semistructured interviews with engineering managers to better conceptualize 1) what adaptability in engineering workplaces looks like, i.e., identify a typology of mindsets and behaviors necessary for engineers to adapt, and 2) if adaptability is sought after and rewarded as an engineering competency on the job.…”