Computational electromagnetism begins where electromagnetic theory stops, and stops where engineering takes over. Its purpose is not to establish Maxwell equations, and other essential physical theories, but to use them in mathematical modelling, with concrete problems in view. Modelling is this activity by which questions about a physical situation are translated into a mathematical proble…
This paper examines the role of optical and electronic technologies in future high-capacity routers. In particular, optical and electronic technologies for use in the key router functions of buffering and switching are compared. The comparison is based on aggressive but plausible estimates of buffer and switch performance projected out to around 2020. The analysis of buffer technologies uses a…
This is a book for anyone who wants to get to know about electronics. It requires no previous knowledge of the subject, or of electrical theory, and the treatment is entirely non-mathematical. It begins with an outline of electricity and the laws that govern its behaviour in circuits. Then it describes the basic electronic components and how they are used in simple electronic circuits. Sem…
Digital electronics is essential to understanding the design and working of a wide range of applications, from consumer and industrial electronics to communications; from embedded systems, and computers to security and military equipment. As the devices used in these applications decrease in size and employ more complex technology, it is essential for engineers and students to fully understa…
Automatic control of many day to day tasks relieves the human beings from performing repetitive manual operations. Automatic control allows optimal performance ,of dynamic systems, increases productivity enormously, removes drudgery of performing same task again and again. Imagine manual control of a simple room heating system. If the room temperature is to be maintained at a desired temper…
Who are you? However much you relate your identity to your physical appearance, you know that your personality ultimately resides in the unique arrangement of your brain’s electrical network. Mary Shelley may have conceived of electricity as a mystical life force that could jerk the leg of a dead frog or animate Dr. Frankenstein’s monster, but we now know the truth is both more subtle and …
Abstract. We report on the fabrication and electrical characterization of MIM capacitors using barrier type anodic alumina dielectric between Al electrodes. Its fabrication is based on CMOS compatible room temperature processing using electrochemistry which is a simple and cost effective process. The obtained capacitors exhibit large capacitance density (above 7 fF/lm2) and very small leaka…
ABSTRACT: Three-dimensional graphene-based frameworks (3D-GFs) with hierarchical macro- and mesoporous structures are presented. The interconnected macropores are derived from hydrothermally assembled 3D graphene aerogels (GAs), while the mesopores are generated by the silica networks uniformly grown on the surface of graphene. The resulting 3D-GFs exhibit narrow mesopore size distribution (2…
Abstract. Novel mesoporous carbon has been synthesized using rod-like nano-hydroxyapatite (HA) particles as templates, sucrose as carbon precursor by polymerizing, carbonizing and the removal of templates with HCl solution. In the process, HA not only acted as an endotemplate but also an exotemplate producing micropores and mesopores. Subsequently, mesoporous carbon was modified by HNO3 sol…
Abstract: This paper presents a wavelet-SVM (support vector machine) combined approach for digital relaying. The proposed algorithm for fault location employs wavelet transform together with SVM. Computer simulations using MATLAB have been conducted for a 300 km, 400 kV line. The SVM has been trained using simulated data to give desired output for fault locations for faults at any unknown dis…
Abstract: This paper proposes a new configuration of photovoltaic unified power quality conditioner (PV-UPQC) that consists of the PV array, DC/DC converter and UPQC for compensating the voltage interruption. The proposed PV-UPQC can compensate the reactive power, harmonic current, voltage sag and swell and the voltage interruption. The performance of the proposed system is verified through …