Use of PDES in Group Technology Applications for Electronics

1992 ◽  
Author(s):  
G. Harhalakis ◽  
A. Kinsey ◽  
I. Minis
Keyword(s):  
Relational Database ◽  
Code Generation ◽  
Group Technology ◽  
Product Information ◽  
Ground Plane ◽  
Primary Input ◽  
University Of Maryland ◽  
Product Information Model ◽  
Technology Applications ◽  
The University

Abstract A novel application of the PDES standard for automated group technology (GT) code generation is presented. The study focuses on microwave modules (MWM’s), which include a mechanical ground plane with machined features, as well as electrical artwork and electronic components. Several modifications and enhancements were made to the Layered Electrical Product information model of the PDES standard in order to capture the particular characteristics of MWM’s. The modified PDES model was implemented using the ORACLE relational database, and served as the primary input to the automated GT code generation system developed at the University of Maryland. The principle difficulties encountered using PDES in our work are discussed, including: (i) lack of a proper feature hierarchy, (ii) limiting supertype-subtype specifications, and (iii) complications in implementing the LEP model to a relational database schema.

Group Technology Code Generation Over the Internet

1997 ◽  
Author(s):  
Venkatraman Kalyanapasupathy ◽  
Edward Lin ◽  
Ioannis Minis
Keyword(s):  
Code Generation ◽  
Group Technology ◽  
Product Information ◽  
Service Providers ◽  
Mechanical Design ◽  
The Internet ◽  
Mechanical Parts ◽  
Product Information Model ◽  
Feature Based ◽  
Use Of The Internet

Abstract This paper discusses the use of the Internet to support the generation of Group Technology codes for mechanical parts. In our approach, we use a STEP-based product information model as a medium for the exchange of product information between designers and manufacturing service providers through an Internet broker. The designer uses a commercial CAD tool to create a feature-based mechanical design. The CAD design file is automatically translated into a standard STEP file. The latter is the input to the automated GT code generation tool which has been implemented as a manufacturing service available to the designer over the Internet. An Internet broker facilitates the entire exchange of product information between the designer and the service provider through the World Wide Web. We have found that automated GT code generation is a prime candidate for a distributed manufacturing service.

scholarly journals The McDonaldization of Academic Libraries?

2015 ◽  
Vol 76 (3) ◽  
pp. 339-352 ◽  
Author(s):  
Brian Quinn
Keyword(s):  
Academic Libraries ◽  
Fast Food ◽  
Food Industry ◽  
Fast Food Industry ◽  
University Of Maryland ◽  
The University

George Ritzer, a sociologist at the University of Maryland, has proposed an influential thesis that suggests that many aspects of the fast food industry are making their way into other areas of society. This article explores whether his thesis, known as the McDonaldization thesis, is applicable to academic libraries. Specifically, it seeks to determine to what extent academic libraries may be considered McDonaldized, and if so, what effect McDonaldization may be having on them. It also investigates some possible alternatives to McDonaldization, and their implications for academic libraries.

Development of Team Coordination and Performance Measures in a Trauma Setting

2007 ◽  
Vol 51 (11) ◽  
pp. 717-721 ◽  
Author(s):  
Stuart Marshall ◽  
Anne Miller ◽  
Yan Xiao
Keyword(s):  
Team Performance ◽  
Decision Support Tool ◽  
Stage Model ◽  
Trauma Resuscitation ◽  
Team Coordination ◽  
Support Tool ◽  
University Of Maryland ◽  
Performance Metric ◽  
And Performance ◽  
The University

The paucity of reliable measures of team coordination and performance significantly obstructs the assessment of the effects of any technology on teams to improve decision making in health care. A pilot study was conducted to determine if measures of coordination and performance could be developed for teams involved in trauma resuscitation. A video assisted review of cases enabled evaluation of the use of the tools. Descriptors of coordination were derived from Klein's five-stage model of team coordination. A scoring system of team performance was developed from the University of Maryland Team Observable Performance Metric (UMTOP). After some modification both coordination and performance could be described. However, four defined stages of resuscitation were observed which greatly improved coding. More rigorous assessments of these tools will be required before firm conclusions can be drawn about the effects of a decision support tool recently introduced into the environment.

The University of Maryland, Maryland Advanced Simulation, Training, Research and Innovation (MASTRI) Center

2010 ◽  
Vol 67 (6) ◽  
pp. 473-476 ◽  
Author(s):  
Gerald Moses ◽  
F. Jacob Seagull ◽  
Erica Sutton ◽  
Gyusung Lee ◽  
Ivan George ◽  
...  
Keyword(s):  
Simulation Training ◽  
University Of Maryland ◽  
Research And Innovation ◽  
Training Research ◽  
The University

Recent progress in photoconductive opening switch research at the University of Maryland

1993 ◽  
Author(s):  
Eric E. Funk ◽  
Pak S. Cho ◽  
Ping-Tong Ho ◽  
Julius Goldhar ◽  
Chi H. Lee
Keyword(s):  
Recent Progress ◽  
University Of Maryland ◽  
Opening Switch ◽  
The University

Double Adjustable Shock Absorbers Utilizing Electrorheological and Magnetorheological Fluids

2000 ◽  
Author(s):  
Jason E. Lindler ◽  
Norman M. Wereley
Keyword(s):  
Shock Absorber ◽  
Force Measurements ◽  
Damping Force ◽  
University Of Maryland ◽  
Shock Absorbers ◽  
Piston Head ◽  
Performance Requirements ◽  
Velocity Response ◽  
The University ◽  
Yield Force

Abstract Double adjustable shock absorbers allow for independent adjustment of the yield force and post-yield damping in the force versus velocity response. To emulate the performance of a conventional double adjustable shock absorber, an electrorheological (ER) and magnetorheological (MR) automotive shock absorber were designed and fabricated at the University of Maryland. For the ER shock absorber, an applied electric field between two tubular electrodes, located in the piston head, increases the force required for a given piston rod velocity. For the MR shock absorber, an applied magnetic field between the core and flux return increases the force required for a given piston rod velocity. For each shock absorber, two different shaped gaps meet the controllable performance requirements of a double adjustable shock absorber. A uniform gap allows for control of the yield force of the shock absorber, while a non-uniform gap allows for control of the post-yield damping. Force measurements from sinusoidal displacement cycles, recorded on a mechanical damper dynamometer, validate the performance of uniform and non-uniform gaps for adjustment of the yield force and post-yield damping, respectively.

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