Bartholomew O. Nnaji

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This paper discusses a methodology for placing transceivers in Radio Frequency Data Communication (RFDC) implementations. RFDC is a critical component of many automated applications for which industrial engineers are typically responsible. For example, in warehouse management systems, it is often used to track product inventory levels. In Manufacturing(More)
Establishing efficient, effective, and trustworthy engineering collaboration while protecting intellectual property is vital to maintain organizational competence in today’s global business environment. In this paper, a lean information modeling and sharing framework is described to support engineering data security management in a peer-to-peer(More)
In current feature-based parametric design systems, the reusability principle is not fully supported as it was expected. Unpredictability and ambiguity of models often happen during design modification within one system as well as among different systems. This reference deficiency significantly reduces the power of feature-based parametric modeling, where(More)
Joints in product design are common because of the limitations of component geometric configurations and material properties, and the requirements of inspection, accessibility, repair, and portability. Collaborative product design is emerging as a viable alternative to the traditional design process. The collaborative assembly design (AsD) methodologies are(More)
Current parametric CAD systems require geometric parameters to have fixed values. Specifying fixed parameter values implicitly adds rigid constraints on the geometry, which have the potential to introduce conflicts during the design process. This paper presents a soft constraint representation scheme based on nominal interval. Interval geometric parameters(More)
There is now greater demand for product customization. For large-scale mechanical product customization, there is great need to develop new methods that will ensure shorter design cycle, shorter time to market, reduced life cycle cost, and higher product quality. The emergence of the Internet makes mass customization possible. It is essential that tools(More)
Today's virtual prototyping systems for assembly provide a single instance of simulation and analysis solutions from models that are often generated from scratch. Virtual assembly models (VAM) are not fully integrated with other design activities, such as conceptual and detailed design, and design intent is not fully propagated to all product development(More)
In recent years, there has been significant attention given to improved methods and tools for engineering design. While advances for the latter stages of design have been impressive, this has not been the case for the early stages of design. In general, advances have provided for either a top-down or a bottom-up approach to design; ignoring the requirements(More)