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Search Publications by: Ram D. Sriram (Fed)

Displaying 226 - 250 of 310

An Analysis of Path Recovery Schemes in GMPLS Optical Networks with Various Levels of Pre-Provisioning

October 1, 2003

Author(s)

David W. Griffith, Richard A. Rouil, Stephan Klink, Ram D. Sriram

The amount of resource provisioning prior to failure events to support optical path recovery has a significant impact on network performance, and so designing recovery mechanisms for any large network necessitates balancing multiple (in some cases

Knowledge Intensive Collaborative Decision Support for Design Process

September 1, 2003

Author(s)

XuanFang Zha, Ram D. Sriram, W F. Lu

Engineering design is essentially a collaborative decision making process that requires rigorous evaluation, comparison and selection of design alternatives and optimization from a global perspective on the basis of different classes of design criteria

Process Specification Language for Project Information Exchange

August 1, 2003

Author(s)

Michael Gruninger, Ram D. Sriram, J. Cheng, K Law

There are many project scheduling and management programs employed in the construction industry. Standards-based translation is one way to achieve interoperability. This study discusses the applicability of the Process Specification Language (PSL) for

A Product Information Modeling Framework For Product Lifecycle Management

June 1, 2003

Author(s)

Steven J. Fenves, Ram D. Sriram, Sudarsan Rachuri, Fujun Wang

We describe a framework for representing products based on the NIST Core Product Model (CPM) and its extensions, the Open Assembly Model (OAM), the Design-Analysis Integration model (DAIM), and the Product Family Evolution Model (PFEM). These are abstract

A System for Generating Process and Material Selection Advice During Embodiment Design of Mechanical Components

June 1, 2003

Author(s)

Satyandra K. Gupta, Y Chen, Shaw C. Feng, Ram D. Sriram

This paper describes (1) a systematic approach to material and process selection during embodiment design of mechanical components, (2) algorithms for supporting various steps in our approach, and (3) a system for generating process and material selection

Functional Tolerancing of a Gearbox

June 1, 2003

Author(s)

H Wang, Utpal Roy, Sudarsan Rachuri, Ram D. Sriram, Kevin W. Lyons

This paper proposes a scheme for the tolerance specification that uses the features? function information and mating condition attributes in the assembly to derive an appropriate tolerance specification as per the design intents. The proposed mirror method

Master Product Model for the Support of Tighter Integration of Spatial and Functional Design

June 1, 2003

Author(s)

Steven J. Fenves, Young Choi, Balan Gurumoorthy, Greg Mocko, Ram D. Sriram

In this report, we review current engineering practices and the research literature in the area of design - analysis integration in the product development process. We then propose a conceptual data architecture that can provide the technical basis for

Tolerance Synthesis Scheme

June 1, 2003

Author(s)

Utpal Roy, N Pramanik, Sudarsan Rachuri, Ram D. Sriram, Kevin W. Lyons

The objective of this report is to identify representations and issues for the generic assembly information model and its use in a proactive tolerance synthesis scheme. It is proposed to use the small displacement torsors (the screw parameters) as a

Towards Modeling the Evolution of Product Families

June 1, 2003

Author(s)

Fujun Wang, Steven J. Fenves, Sudarsan Rachuri, Ram D. Sriram

A strategy successfully used by manufacturing companies is to develop product families so as to offer a variety of products with reduced development costs. This paper introduces our initial research on the representation of the evolution of product

A Proposed ISO 10303 (STEP)-based Approach for Representing Heterogeneous Objects for Layered Manufacturing

August 1, 2002

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 (LM) have shown potentialor the physical realization of heterogeneous (multi-material) objects. Thus, there is a need to

A Scheme for Transformation of Tolerance Specifications to Generalized Deviation Space for Use in Tolerance Synthesis and Analysis

July 1, 2002

Author(s)

H Wang, N Pramanik, Utpal Roy, Sudarsan Rachuri, Ram D. Sriram, Kevin W. Lyons

Traditionally tolerances for manufactured parts are specified using symbolic schemes as per ASME or ISO standards. To use these tolerance specifications in computerized tolerance synthesis and analysis, we need an information model to represent the

A Decomposition-Based Approach to Layered Manufacturing

June 1, 2002

Author(s)

I Llinkin, R Janardan, J J. Majhi, J Schwerdt, Miles E. Smid, 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 computer models using a

Progress Towards an International Standard for Data Transfer in Rapid Prototyping and Layered Manufacturing

May 1, 2002

Author(s)

Mike Pratt, Amba D. Bhatt, D Dutta, Kevin W. Lyons, Lalit Patil, Ram D. Sriram

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

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