U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Search Publications by: Ram D. Sriram (Fed)

Search Title, Abstract, Conference, Citation, Keyword or Author
Displaying 126 - 150 of 155

Nanomanufacturing of Atom-Based Dimensional Standards - A Final Project Report of the NAMT

January 1, 2002
Author(s)
Robert Allen, J J. Pellegrino, D Monk, E C. Teague, Dennis A. Swyt, Joseph Fu, Richard M. Silver, Theodore V. Vorburger, Bradley N. Damazo, Robert Russell, Thomas E. Wheatley, Keith A. Stouffer, Manfred Osti, David Wilmering, Richard L. Rhorer, Ram D. Sriram
This report describes the accomplishments of the Nanomanufacturing of Atom-based Dimensional Standards Project, which operated as part of the National Advanced Manufacturing Testbed (NAMT) a program formally operating from fiscal year (FY) 1996 to FY 2000

Standards for Collaborative Product Development

September 1, 2001
Author(s)
Ram D. Sriram
We are currently witnessing the emergence of an Internet-based engineering marketplace, where engineers, designers, and manufacturers from small and large companies are collaborating through the Internet to participate in RFQs (requests for quotes), create

Progress Towards an International Standard for Data Transfer in Rapid

August 1, 2001
Author(s)
Lalit Patil, D Dutta, Ram D. Sriram, Kevin W. Lyons, Amba D. Bhatt, Mike Pratt, M Allahabad
This paper discusses the informational requirements of rapid prototyping and layered manufacturing (RPLM). The study is motivated by the recent decision to embark on the development of a new Application Protocol for the international standard ISO 10303

The Role of Knowledge in Next-generation Product Development Systems

March 6, 2001
Author(s)
Simon Szykman, Ram D. Sriram, William Regli
Information technology has played an increasingly important role in engineering product development. Its influence over the past decade has been accelerating and its impact in the coming decade will undoubtedly be immense. This paper surveys several

A Decomposition-Based Approach to Layered Manufacturing

January 1, 2001
Author(s)
R Janardan, I Ilinkin, J Schwerdt, Miles E. Smid, J J. Majhi, Ram D. Sriram
This paper introduces a new approach for improving the performance and versatility of Layered Manufacturing (LM), which is an emerging technology that makes it possible to build physical prototypes of 3D parts directly from their CAD models using a

Information Modeling on Conceptual Design Integrated with Process Planning

November 1, 2000
Author(s)
Ram D. Sriram, Mike Pratt, Shaw C. Feng, Eugene Song
Information modeling is critical to the integration of conceptual design and process planning. An information model for conceptual design is provided in this paper. Conceptual design is a key activity in early product development. It determines product

Environmental Issues in Collaborative Design

September 1, 2000
Author(s)
Robert Allen, Ram D. Sriram
We report about environmental issues in collaborative design. Specifically, we present background and motivation for the need to design greener products. After defining the green design process, we demonstrate how that integrates with the typical product

Design Repositories: Next-Generation Engineering Design Databases

July 1, 2000
Author(s)
Simon Szykman, Christophe Bochenek, J Racz, Ram D. Sriram
Summary of the NIST Design Repository Project, revised with some additional content on representation of function in computer-based design, and using XML to describe function and taxonomies in computer-based design.

Representation of Heterogeneous Objects in ISO 10303 (STEP)

July 1, 2000
Author(s)
Lalit Patil, D Dutta, Amba D. Bhatt, Kevin K. Jurrens, Kevin W. Lyons, Mike Pratt, Ram D. Sriram
Solid modeling of objects forms an important task in design and manufacturing. Recent developments in the field of layered manufacturing have shown potential for the physical realization of heterogeneous (multi-material) objects. Thus, there is a need to

Representing an Artifact Transport System in a Design Repository: A Case Study

July 1, 2000
Author(s)
Robert Allen, Ram D. Sriram, Simon Szykman, Robert J. Fijol
We report on a case study representing the design essence of a prototype ultra-high vacuum artifact transport system (ATS) in an existing design repository (DR). Specifically, we represent engineering geometry, function and assosiated behavior, as well as

The Role of Standards in Innovation

July 1, 2000
Author(s)
Robert Allen, Ram D. Sriram
We review and explore the role of standards in innovation, with particular emphasis on the design and manufacturing processes. We begin by defining and classifying standards and by exploring their role and infrastructure in society. This is followed by a

Web-Based System for Design Artifact Modeling

July 1, 2000
Author(s)
Simon Szykman, J Racz, Christophe Snowden, Ram D. Sriram
Modern engineering industry is relying more and more on the use of knowledge in product development. The NIST-Design Repository Project, at NIST, is working to develop infra-structural technologies to support the use of design repositories in industry.

Enhancing Collaboration using an Internet Integrated Workbench

September 1, 1999
Author(s)
Robert Allen, Srinivas Nidamarthi, S P. Regalla, Ram D. Sriram
We report on our experience using an Internet-based collaborative environment to enhance the design and manufacturing process of a custom-designed artifact transport system (ATS). Specifically, we focus on overcoming the hurdles associated with exchanging

Incoporating Process Planning into Conceptual Design

September 1, 1999
Author(s)
Shaw C. Feng, Gordon A. Shaw, Walter W. Nederbragt, Serge Kaing, Ram D. Sriram
This paper describes recent developments in the Design and Process Planning Integration (DPPI) project at the National Institute of Standards and Technology (NIST). The project addresses the need for improved communication between design and process

The Representation of Function in Computer-Based Design

September 1, 1999
Author(s)
Simon Sykman, Ram D. Sriram, J Racz
This paper proposes a standardized representation of function for use by the research community, industry, and eventually commercial software vendors. This includes schemata (information models) for representation of function and associated flows, as well

The Use of XML to Describe Function and Taxonomies in Computer-based Design

September 1, 1999
Author(s)
Simon Sykman, Ram D. Sriram, Jocelyn Senfaute
This paper presents a mapping of a standardized representation of a function, consisting of schemata for functions and associated flows. Along with taxonomies of generic functions and flows, into the Extensible Markup Language (XML). A language similar in

The NIST Design Repository Project

March 1, 1999
Author(s)
Simon Szykman, Ram D. Sriram, Christophe Bochenek, J Racz
Modern engineering industry is relying more and more on the use of knowledge in product development. This paper advocates design repositories as a natural progression from traditional design databases to systems that are created to more actively support

Collaborating on the Design and Manufacture of an Atomic Artifact Transport System: A Case Study in VRML as a Visualization Tool for Consensus Building

September 1, 1998
Author(s)
Robert Allen, Srinivas Nidamarthi, P V. Rao, Richard L. Rhorer, Ram D. Sriram, E C. Teague
We report on our experience using the Virtual Reality Markup Language (VRML) to collaborate on the design and manufacture of an artifact transport system (ATS). Specifically designed for the purpose of transporting nanometer-scale dimensional artifacts at

Internet-Based Delivery of CAD/CAM Capability: An Industry Case Study

September 1, 1998
Author(s)
Simon Szykman, Ram D. Sriram
This paper presents a case study in the use of the Internet as a medium for exchange of information and delivery of computer-aided design and computer-aided manufacturing (CAD/CAM) capability. The case study describes collaboration among researchers and

The NIST Design/Process Planning Integration Project

September 1, 1998
Author(s)
Walter W. Nederbragt, Robert Allen, Shaw C. Feng, Serge Kaing, Ram D. Sriram, Yuyun Zhang
This paper presents a description of the National Institute of Standards and Technology (NIST) Design/Process Planning Integration (DPPI) Project, which addresses the need for improving communications between design and process planning activities

Towards STEP-Based Data Transfer in Layered Manufacturing

September 1, 1998
Author(s)
D Dutta, Anil Kumar, Mike Pratt, Ram D. Sriram
This paper concerns the informational requirements of layered manufacturing (LM). The most common industrial use of LM today is for rapid prototyping, but we take a wider view of it as a flexible fabrication technology. Its use in building functional

An Object-Oriented Representation for Product and Design Processes

July 1, 1998
Author(s)
Ram D. Sriram, S Gorti, A Gupta, Gerard Kim, A Wong
We report on the development of a knowledge representation model, which is based on the SHARED object model reported in [33,34]. Our current model is implemented as a layered scheme, that incorporates both an evolving artifact and its associated design