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In the present scenario the concept of sustainable manufacturing are being adopted by the industries for avoiding environmental hazards and excessive costs of manufacturing. A number of manufacturing key factors such as lean concepts, eco-design, product design, product recovery and process design are available to achieve sustainability. This paper presents an empirical study for evaluating the key...
In this article, we analyse the effect of Si-delta doping and barrier legth variation on the performance of triple barrier resonant tunneling diode (TBRTD). Firstly, we propose a model of triple barrier RTD and characterize its properties then insert a delta layer in the middle of the well within geometry of the device. Furthermore, Compare the characteristics of δ-doped structure and normal structure...
This book presents contributions of mathematicians covering topics from ancient India, placing them in the broader context of the history of mathematics. Although the translations of some Sanskrit mathematical texts are available in the literature, Indian contributions are rarely presented in major Western historical works. Yet some of the well-known and universally-accepted discoveries from India,...
This paper includes the effect of barrier length variations associated with the I–V characteristics of GaAs/AlGaAs Resonant Tunneling Diode (RTD). The changes in device like electron density, charge density and Fermi levels have been shown with their characteristics, which give the actual behavior of the device and helps in analyzing the device. Furthermore, comparison of these changes with previous...
Dc-dc Zeta converter is a buck-boost type of converter, which yields dc output voltage with same polarity that of the input voltage. It is widely used in various domestic and industrial applications. For good voltage regulation, fast dynamic response, and stable operation of this converter, a feedback control design is necessary. Therefore, in this paper, the duty cycle to output voltage small-signal...
In this paper, mathematical modeling of dc-dc buck and boost converter is presented using Leverrier algorithm. The main advantage of this method is that there is no need to determine the inverse of a matrix and hence, this method is computationally efficient. Further, it shown that by reducing second order model of dc-dc buck and boost converter to first order, similar performance can be achieved...
Lean manufacturing is one of the initiatives that major businesses all around the world have been trying to adopt in order to remain competitive in the increasingly global market and six sigma was an American “invention”. The central idea behind six sigma is that if you can measure how many “defects” you have in process, you can systematically figure out how to eliminate them and get as close to “Zero...
In this paper we present the effect on I-V characteristics of GaAs/AlGaAs Resonant Tunneling Diode (RTD) as a function of Doping concentration. This simulation study may be utilized to improve the performance of RTD at high frequencies. Furthermore, these characteristics provide a comparative relation with other parameters like barrier length and spacer layer. Simulation performed using Nextnano3...
In this paper we describes the impact of gate length and schottky layer variation of InP based double δ-doped InAlAs/InGaAs high electron mobility transistor (HEMT). We study the effect of gate length and schottky layer variation. To obtain the various effects we use Atlas and nextnano3 tools. We have performed the characterization studies on the various parameters like threshold voltage (Vth), cut-off...
In this article, the sensing effect of piezoelectric cantilever sensor subjected to mechanical excitation are discussed. General analytical expression relating voltage generations to applied mechanical input excitations are derived based on the constitutive equations of these bending devices. It is observe that the clamping effect of each component in piezoelectric cantilever devices decreases the...
It is observed that many researchers are working in developing new breed of dc-dc converters for various applications. For analysis and controller design, physical system is needed to be modeled into either transfer function form or state space form. However, researches are using conventional approach for obtaining transfer function from state space form. But this approach is troublesome when the...
There are volume of research articles regarding Load Frequency Control (LFC) of single area/multi area power system considering various control strategies. To use these research articles in a systematic way, an exhaustive literature review is required to avoid duplication in research work. In this paper, a review on LFC of power system using different control techniques is given. The linear and nonlinear...
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