Hierarchical decomposition and simulation of manufacturing cells using Ada

A useful tool in the development of flexible automation is a system description language which can generate a complete func tional description of a manufacturing cell of arbitrary complexity. We propose a description system based on the concept of hierar chical decomposition utilizing the Ada programming language in conjunction with established diagrammatical decomposition methods. The distinguishing aspect of our work is that it takes advantage of certain features of Ada (such as type checking) to create a description that can be automatically verified for con sistency Simulation is often an indispensable tool in the develop ment of manufacturing systems. We show how a simulation of the operation of the manufacturing cell can be embedded in its description. Finally, we apply the methodology to a specific instance of a manufacturing cell.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/68498/2/10.1177_003754978604600402.pd

Pharmaceutical Creep: U.S. Military Power and the Global and Transnational Mobility of Psychopharmaceuticals

In 2006, the United States Department of Defense developed for the first time official criteria for the use of psychopharmaceuticals “in theater”—in the physical and tactical spaces of military operations including active combat. Based on fieldwork with Army soldiers and veterans, this article explores the transnational and global dimensions of military psychopharmaceutical use in the post‐9/11 wars. I consider the spatial, material, and symbolic dimensions of what I call “pharmaceutical creep”—the slow drift of psychopharmaceuticals from the civilian world into theater and into the military corporate body. While pharmaceutical creep is managed by the U.S. military as a problem of gatekeeping and of supply and provisioning, medications can appear as the solution to recruitment and performance problems once in theater. Drawing on soldiers’ accounts of medication use, I illuminate the possibilities, but also the frictions, that arise when routine psychopharmaceuticals are remade into technologies of global counterinsurgency

Capacity of semi-rigid composite joints in accommodating column loss

In the scenario of column loss, joints would be subjected to bending moment combined with a tensile force due to large vertical displacement, where tensile force plays a critical role in resisting progressive collapse of structure by providing the catenary force. In order to study the effect of tensile force on the behavior of semi-rigid composite joints in structures in the case of column loss, six semi-rigid flush endplate connections tests were conducted, which include pure flexural tests, pure tensile tests and combined flexural and tensile tests. The experimental results indicate that under pure bending moment condition, the semi-rigid composite joint displays sufficient rotation capacity for forming “catenary action”. It is characteristic of the semi-rigid composite joint that its moment capacity decreases in a linear manner together with the increase of tensile load. Also, the capacity of semi-rigid composite joints is compared with that of the full-welded rigid composite joints. The tensile strength of high-strength bolts would not exert any effect on the initial stiffness of semi-rigid joint, but bring about decline in the moment resistance and tensile resistance of semi-rigid joint. The joints tend to fail at “catenary phase” under tensile force. A simplified M-N correlation formula for composite joint is proposed to describe the behavior of joint in structures under column loss. The finite element model with material failure criterion can predict the fracture of bolt in semi-rigid composite joint

Comment letters to the National Commission on Commission on Fraudulent Financial Reporting, 1987 (Treadway Commission) Vol. 1

https://egrove.olemiss.edu/aicpa_sop/1661/thumbnail.jp