Rapid Fabrication of Smart Tooling with Embedded Sensors by Casting in Molds Made by Three Dimensional Printing

This paper is to investigate the feasibility of constructing “smart tooling” by embedding thin film sensors, specifically, thin film thermocouples (TFTC) in castings made by molds formed by 3 Dimensional Printing (3DP). This study investigates whether thin film sensors can effectively be cast into larger metal structures and if the sensors survive the casting process. The investigation includes making 3DP molds to produce cast lap joint test bars of aluminum A356 and electroplated nickel to characterize by mechanical testing to find the best process conditions to maximize bond strength between the embedded thin film sensors and the cast material. Lastly molds were made and embedded sensors were placed inside the mold for casting. Some of the embedded sensors survived the casting process. In-situ monitoring of casting process with the embedded sensors was accomplished.Mechanical Engineerin

An eye for accuracy: Coordinate measuring in an R and D environment

The Fermi National Accelerator Laboratory (Fermilab) is a high energy physics research facility. Its purpose is to explore the basic composition of matter. Fermilab does not produce a product nor does it produce electrical power. Funded by the Department of Energy, the main tool for its study is the Tevatron, the world's first superconducting particle accelerator. Fermilab fabricates and assembles the majority of magnets and other components for the accelerator rings of the atom smasher. The magnet is the key to accelerating subatomic particle (i.e., protons, anti-protons, etc.) which the particle accelerator uses to collide into other beams or fixed targets. The production of a magnet assembly requires stacking steel laminations precisely the proper size and shape necessary to create the required magnetic field. In this paper, it will be discussed how coordinate measuring is accomplished at Fermilab, and how such things as tight budgets, and lack of product line can lead to some interesting and useful techniques. 6 figs

MS

thesisThe extent to which mothers achieve specific physical and psychosocial tasks during the first 6 weeks postpartum and their readiness to return to work was studied. A convenience sample of 94 subjects with 24 active duty primiparas, 14 active duty multiparas, 23 nonmilitary primiparas, and 32 nonmilitary multiparas was drawn from 20 sites across the United States. The study had the dual purpose of developing a tool with statistical reliability for data collection and to gather initial descriptive data concerning postpartum physical and psychosocial recovery during the first 6 weeks postpartum and subject readiness to return to work. A mailed questionnaire with subject response at weekly intervals for the first 6 weeks postpartum was used to collect data. An analysis of the data showed no demographic differences between groups twice as many military women return to work at week 6 postpartum than nonmilitary women. Overall, psychosocial postpartum recovery in only in beginning stages during the first 6 weeks postpartum while physical recovery is rapid to advanced stages, with temporary interruptions at weeks 2 and 5 postpartum, in uncomplicated labors and births of all groups. As regards postpartum task resolution and work, the military multipara made the most positive toward attainment and maintenance of maternal role over 6 weeks active duty women who returned to work had the highest attainment of maternal role scores at week 6 postpartum