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This paper describes a research on the cause and prevention of electromagnetic noises in a molding factory mainly handling injection molding tools. Through the investigation of the electromagnetic environment and finding the root causes of the electromagnetic noises, it was found that the implementation of corrective actions on Electromagnetic Compatibility (EMC) issue can be possible even by engineers...
This paper describes a study on the application of a decoration molding technology, one of the traditional techniques in the mold forming technology. The application of this decoration molding technology makes the design of antennas more desirable by adding new values, such as increased accuracy in dimensions and the capability to design antennas on three-dimensional surfaces.
SYNAPSE is a multi-microprocessor Lisp Machine under development at Keio University. It is intended to be a multi-user Lisp machine that gives to each user a List Processing Unit, while list cell memory is shared by all the users. Several Garbage Collection Units constantly perform parallel garbage collection. This paper first gives an overview (hardware and software) of SYNAPSE, then describes the...
This paper describes the design and evaluation of a Complementary Garbage Collector that is a fundamental algorithm for parallel and incremental garbage collection. Our algorithm is a combination of two types of fundamental algorithms, incremental update and snapshot-at-beginning, which are complementary to each other. The algorithm has the advantages of both types: greater efficiency of garbage collection...
Garbage collection (GC) normally causes pause of execution. Parallel GC has a great potential for real time (non-disruptive) processing. A traditional parallel mark and sweep GC algorithm has, however, well known disadvantages. In this paper, we propose a new GC scheme called Partial Marking GC (PMGC) which is a valiant of generational GC. We implemented a Lisp interpreter with PMGC on a...
In high-speed products, the physical and mechanical design can affect both Electromagnetic Compatibility (EMC) and Signal Integrity (SI). With board-level clock frequencies in the above 100MHz to 500MHz range, the first few harmonics are within the common communications bands of TV, FM radio, cell phone, and PCS. This means there is the very real possibility of electronic products interfering with...
Modularization has been supposed to accelerate smartphone products to market because of black box theory. In order to expose many problems areas especially an invisible conflict between RF engineering, and electrical engineering in the smartphone development stage, we propose a comprehensive study into prospects for the visualization of smartphone design process by Design Structure Matrix. Therefore,...
In order to contemplate the best form of engineering education, this paper provides studies on engineering education using Design Structure Matrix, and fractal analysis to deal with complicated product development management in iron-making plant engineering.
In the earliest days of the cell phone industry, one of the most awkward process of a cell phone project was integration. Modules that worked individually were put together and the whole usually failed in ways that were very difficult to find. Yet in the last decade, it seems electronic integration has largely vanished as a source of pain for projects. One of the reason is that Computer Aided Engineering...
This paper provides a unique solution for offering numerous suggestions to design complexity in digital camera products through the position of electromagnetic compatibility. In general, product development is divisible in to four major stages according to the process-concept development, product planning, product engineering, and process engineering-and the critical linkages within and across them...
A new proposal is introduced for a designing process of digital single-lens reflex camera. This paper describes that Design Structure Matrix is one of the effective method for engineering design such as digital single-lens reflex camera. Also, Design Structure Matrix helps both package and mechanical engineers to understand EMC/EMI issues and RF techniques in extremely simple terms, such as modules.
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