We discuss an extension of the Buckley-Leverett (BL) equation describing twophase flow in porous media. This extension includes a third order mixed derivatives term and models the dynamic effects in the pressure difference between the two phases. We derive existence conditions for traveling wave solutions of the extended model. This leads to admissible shocks for the original BL equation, which...

This paper describes the structure and potential of an Internet-based mixed-signal design course, which is initiated between industry (Infineon Technologies, Munich) and Darmstadt University of Technology. The challenges for developing and integrating mixed-signal Systems-on-Chip (SoCs) in modern application areas, e. g. mobile telecommunication devices, are sketched, which results in new inter...

The rising trend in large scale integration and design complexity has greatly increased the need for efficient design error diagnosis. We present techniques for fast and efficient error diagnosis of digital circuits by eliminating to a large extent the set of false candidates identified by the diagnosis. The elimination of false candidate regions is conducted via distinguishing X’s, flipping of...

To effectively protect the cross-power-domain interface circuits from electrostatic discharge (ESD) damages, a PMOS-based local ESD clamp was proposed in this work. The test circuits of prior and proposed designs have been implemented in silicon chip. The proposed design has the small chip area, low leakage current, and low peak transient voltage; therefore, it can help to reduce the overstress...

This paper shows how digital logic may be taught to undergraduate students through the use of a logic simulation tool designed for pedagogical purposes. Digital logic is commonly taught either completely theoretically or together with practical work on breadboards using Small Scale Integration (SSI) devices. Such practical work is limited in scope and often teaches more about how to connect wir...

Competing in an increasingly uncertain business environment, organizations need to mitigate its supply chain risks to enhance their resiliency. However, it is important to implement appropriate strategies to meet business needs. This paper presents a novel approach that integrates fuzzy risk assessment and fuzzy Delphi for the evaluation of strategies in order to mitigate supply chain risks. Th...

Self testing of integrated circuits by random patterns has several technical and economical advantages. But there exists a large number of circuits which cannot be randomly tested, since the fault coverage achieved that way would be too low. In this paper we show that this problem can be solved by unequiprobable random patterns, and an efficient procedure is presented compu ting the specific op...

An Arithmetic logic Unit (ALU) is an integral part of a computer processor. It has the capability of performing a no. of different arithmetic and logic operations such as addition, subtraction, bit-shifts and magnitude comparison. ALUs of various bit-widths are frequently required in very large-scale integrated circuits (VLSI) from processors to application specific integrated circuits (ASICs)....

A novel technique called reverse circuit execution is presented as an efficient approach towards integrated parallel execution of multiple sequential circuit simulators. The unique aspect of this approach is that it does not require source code modifications to either simulation engines or circuit models, and hence holds appeal in situations where parallelism is desirable but without access to ...

This paper present the research work directed towards the design of reversible programmable logic array using very high speed integrated circuit hardware description language (VHDL). Reversible logic circuits have significant importance in bioinformatics, optical information processing, CMOS design etc. In this paper the authors propose the design of new RPLA using Feynman & MUX gate. VHDL base...