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Simulation of an intelligent network - Basic call state model remote laboratory

Simulation of an intelligent network - Basic call state mode...

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2nd International Workshop on e-Learning and Virtual and Remote Laboratories, VIRTUAL-LAB 2008

作者： Sandu, Florin Bâlbâe, Sorin Cserey, Szilárd BǍlan, Titus Constantin Transilvania University of Brasov Faculty of Electrical Engineering and Computer Science Str. Politehnicii nr. 1 Brasov 500024 Romania Siemens Program and System Engineering Str. Mihail Kogalniceanu nr. 21 Brasov 500090 Romania

ISBN: (纸本)9783940793171

This paper presents a remotely accessible Telecom Intelligent Network (IN) simulator, centered on the Basic Call State Mode (BCSM). This model is a Finite State Machine which describes the behavior of IN services in the call processing. The simulator is dedicated to the students in Telecom and allows them to get acquainted with the operation of the IN Service Control Point (SCP) in different scenarios they can imagine.

关键词： Intelligent networks

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Service orientation in education intelligent networks for eLearning / mLearning

Service orientation in education intelligent networks for eL...

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2nd International Workshop on e-Learning and Virtual and Remote Laboratories, VIRTUAL-LAB 2008

作者： Sandu, Florin BǍlan, Titus Constantin DovǍncescu, Silviu Cserey, Szilárd Transilvania University of Brasov Faculty of Electrical Engineering and Computer Science Str. Politehnicii nr. 1 Brasov 500024 Romania Siemens Program and Engineering System Str. Mihail Kogalniceanu nr. 21 Brasov 500090 Romania

ISBN: (纸本)9783940793171

In Intelligent Networks (IN), processing of services is taken out of the switches and placed (as "middleware") in separated and distributed computer nodes. Thus, "service integrators" (and not only equipment manufacturers or network operators) can design, deploy and administrate telecom processes tailored to the specific needs of targeted customers (individuals or groups). Education is centered on communications, so IN can be used to enhance learning management systems (LMS), with no space boundaries and in total compliance with community goals. Proprietary IN platforms are used mostly by telecom operators, but open source platforms, using Java APIs (e.g. Mobicents) are nowadays available for educational service creation in universities - which represents the subject of this paper.

关键词： Middleware

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A Current-Mode Wheatstone Bridge Employing Only Single DO-CDTA

A Current-Mode Wheatstone Bridge Employing Only Single DO-CD...

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IEEE Asia-Pacific Conference on Circuits and Systems

作者： Chaiya Tanaphatsiri Winai Jaikla Montree Siripruchyanun Department of Telecommunication technology Faculty of Engineering Rajamangala University of Technology Songkhla Thailand Electric and Electronic Program Faculty of Industrial Technology Suan Sunandha Rajabhat University Bangkok Thailand Department of Teacher Training Electrical Engineering Faculty ofTechnical Education King Mongkut''s University of Technology Bangkok Thailand

This article proposes a topology of current-mode improved Wheatstone bridge based on dual-output current differencing transconductance amplifier (DO-CDTA). The features of the proposed configuration are that: magnitude of output signal can be controlled via the input bias currents; the proposed circuit is low temperature sensitive, the circuit description is very simple. The circuit performances are depicted through PSPICE simulations, they show good agreement to theoretical anticipation and provide ability to measure small resistance changes at a wide range of frequency (more than 60 MHz). The power consumption is approximately 4.55 mW at ~1.5 V supply voltages.

关键词： Bridge circuits Circuit topology Transconductance Temperature control Temperature sensors Performance evaluation SPICE Circuit simulation electrical resistance measurement Frequency measurement

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Current Controlled CCTA Based- Novel Grounded Capacitance Multiplier with Temperature Compensation

Current Controlled CCTA Based- Novel Grounded Capacitance Mu...

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IEEE Asia-Pacific Conference on Circuits and Systems

作者： Phamorn Silapan Chaiya Tanaphatsiri Montree Siripruchyanun Electric and Industrial Program Faculty of IndustrialTechnology Uttaradit Rajabhat University Mueang Uttaradit Thailand Department of Telecommunication technology Faculty of Engineering Rajamangala University of Technology Songkhla Thailand Department of Teacher Training Electrical Engineering Faculty of Technical Education King Mongkut''s University of Technology North Bangkok Bangkok Thailand

This article introduces a grounded capacitance multiplier employing current controlled current conveyor transconductance amplifiers (CCCCTAs). The provided capacitor is a grounded element. Its outstanding feature is that the capacitive value can be electronically adjusted by input bias currents of the CCCCTA and is temperature-insensitive. The circuit construction comprises two CCCCTAs, cooperating with a grounded capacitor. The circuit performances are depicted through PSPICE simulations, they show good agreement to theoretical anticipation. Application as a fifth-order Chebyshev low-pass filter is included.

关键词： Temperature control Capacitance Circuits Capacitors Educational technology Industrial training Filters Operational amplifiers Energy consumption Telecommunication control

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An Electronically Controllable Voltage-mode First-order All-Pass Filter Using Only Single CCCDTA

An Electronically Controllable Voltage-mode First-order All-...

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International Symposium on Communications and Information Technologies (ISCIT)

作者： Chaiya Tanaphatsiri Winai Jaikla Montree Siripruchyanun Department of Telecommunication technology Faculty of Engineering Rajamangala University of Technology Srivijaya Songkhla Songkhla Thailand Electric and Electronic Program Faculty of Industrial Technology Suan Sunandha Rajabhat University Bangkok Thailand Department of Teacher Training in Electrical Engineering Faculty of Technical Education King Mongkut''s University of Technology Bangkok Thailand

This article presents a voltage-mode first-order all-pass filter based on merely single current controlled current differencing transconductance amplifiers (CCCDTA). The features of the circuit are that: the pole frequency can be electronically controlled via the input bias current: the circuit description is very simple, consisting of merely single CCCDTA and single capacitor, without any matching condition constraint. Consequently, the proposed circuit is very appropriate to further develop into an integrated circuit. The PSPICE simulation results are depicted. The given results agree well with the theoretical anticipation. The power consumption is approximately 1.01 mW at plusmn 1.5 V power supply voltages. The application example as a quadrature oscillator is included.

关键词： Voltage control Filters Transconductance Frequency Capacitors SPICE Circuit simulation Energy consumption Power supplies Oscillators

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An Electronically Controllable Dual-Mode Universal Biquad Filter Using Only Single CCCCTA

An Electronically Controllable Dual-Mode Universal Biquad Fi...

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IEEE Asia-Pacific Conference on Circuits and Systems

作者： Winai Jaikla Pisede Sornklin Montree Siripruchyanun Electric and Electronic Program Faculty of Industrial Technology Suan Sunanta Rajabhat University Bangkok Thailand Department of Electronic Faculty of Electrical and Electronic SurinTechnical College Mueang Surin Thailand Department of Teacher Training Electrical Engineering Faculty ofTechnical Education King Mongkuts University of Technology North Bangkok Bangkok Thailand

This article presents a dual-mode (voltage-mode and current-mode) universal biquadratic filter performing completely standard functions: low-pass, high-pass, band-pass, band-reject and all-pass functions, based on plus type dual-output current controlled current conveyor transconductance amplifier (CCCCTA). The features of the circuit are that: the quality factor and natural frequency can be tuned electronically via the input bias currents: the circuit description is very simple, consisting of merely single CCCCTA and 2 capacitors: the circuit can provide either the voltage-mode or current-mode filter without changing circuit topology. Additionally, each function response can be selected by suitably selecting input signals with digital method. Without any external resistors, the proposed circuit is very suitable to further develop into an integrated circuit. The PSPICE simulation results are depicted. The given results agree well with the theoretical anticipation. The maximum power consumption is approximately 1.81 mW at plusmn1.5 V supply voltages.

关键词： Tuned circuits Band pass filters Voltage control Transconductance Q factor Frequency Capacitors Circuit topology Resistors SPICE

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A Cascadable Current-mode Universal Biquadratic Filter Using MO-CCCCTAs

A Cascadable Current-mode Universal Biquadratic Filter Using...

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IEEE Asia-Pacific Conference on Circuits and Systems

作者： Winai Jaikla Montree Siripruchyanun Electric and Electronic Program Faculty of Industrial Technology Suan Sunandha Rajabhat University Bangkok Thailand Department of Teacher Training Electrical Engineering Faculty of Technical Education King Mongkut''s Institute of Technology North Bangkok Bangkok Thailand

This article presents a current-mode universal biquadratic filter (low-pass, high-pass, band-pass functions), based on multiple-output current controlled current conveyor transconductance amplifiers (MO-CCCCTAs). The features of the circuit are that: the quality factor and pole frequency can be tuned orthogonally via the input bias currents: the circuit description is very simple, consisting of merely 2 MO-CCCCTAs and 2 grounded capacitors. Without any external resistors, requiring no component matching conditions, and using only grounded elements, the proposed circuit is very appropriate to further develop into an integrated circuit. Moreover, the proposed circuit enables easy cascading in current-mode, due to high-output impedances. The PSPICE simulation results are depicted. The given results agree well with the theoretical anticipation. The power consumption is approximately 4.04 mW at plusmn1.5 V power supply voltages.

关键词： Band pass filters Tuned circuits Low pass filters Transconductance Q factor Frequency Capacitors Resistors Impedance SPICE

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A Novel Versatile Circuit Functioning as both Filter and Oscillator based on CCCCTAs

A Novel Versatile Circuit Functioning as both Filter and Osc...

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IEEE Asia-Pacific Conference on Circuits and Systems

作者： Phamorn Silapan Winai Jaikla Montree Siripruchyanun Electric and Industrial Program Faculty of Industrial Technology Uttaradit Rajabhat University Mueang Uttaradit Thailand Electric and Electronic Program Faculty of Industrial Technology Suan Sunandha Rajabhat University Bangkok Thailand Department of Teacher Training Electrical Engineering Faculty ofTechnical Education King Mongkut''s Institute of Technology North Bangkok Bangkok Thailand

A circuit which can function both as quadrature oscillator and as a universal biquad filter (low-pass, high-pass, band-pass, band-reject and all-pass functions) is introduced in this paper. Working as quadrature oscillator, the oscillation condition and oscillation frequency can be adjusted independently with the input bias currents. Functioning as a universal biquad filter, the quality factor and natural frequency can be tuned orthogonally via the input bias currents. The proposed circuit can work as either a quadrature oscillator or a universal biquad filter without changing circuit topology. The proposed circuit description is very simple, consisting of merely 2 current controlled current conveyor transconductance amplifiers (CCCCTAs) and 2 grounded capacitors. Without any external resistors and using only grounded elements, this circuit is thus suitable for IC architecture. The PSPICE simulation results are depicted, and the given results agree well with the theoretical anticipation. The maximum power consumption is approximately 3.78 mW at plusmn1.5 V power supplies.

关键词： Oscillators Band pass filters Frequency Low pass filters Q factor Circuit topology Transconductance Capacitors Resistors SPICE

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A High-performance Current-mode Precision Full-wave Rectifier based on BiCMOS-CCCDBAs

A High-performance Current-mode Precision Full-wave Rectifie...

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IEEE Asia-Pacific Conference on Circuits and Systems

作者： Phamorn Silapan Winai Jaikla Montree Siripruchyanun Electric and Industrial Program Faculty of Industrial Technology Uttaradit Rajabhat University Mueang Uttaradit Thailand Electric and Electronic Program Faculty of Industrial Technology Suan Sunandha Rajabhat University Bangkok Thailand Department of Teacher Training Electrical Engineering Faculty of Technical Education King Mongkut''s University of Technology North Bangkok Bangkok Thailand

This article introduces a novel version for implementing current-mode precision full-wave rectifier. The features of the proposed circuit are that: it can rectify and amplify current signal with controllable output magnitude via an input bias current: the output current is free from temperature variation. In addition, direction of the output current signal can be arbitrarily controlled by controlled current in the circuit to be either positive or negative without changing circuit topology, which differs from the previous literatures. Circuit description merely consists of 3 BiCMOS CCCDBAs, without any passive component. The performances of the proposed circuit are investigated through PSPICE. They show that the proposed circuit can function as a current-mode precision full-wave rectifier, where input current range from -240 muA to 240 muA can be achieved at plusmn1.5 V power supplies. The maximum power consumption is 11.8 mW. In addition, the highest frequency is restricted at up to megahertz range.

关键词： Rectifiers Industrial training Electronics industry Educational technology Circuit topology Signal processing Voltage Diodes Temperature control SPICE

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Panel session - preparing the engineers of 2020 - emerging evidence from six exemplary colleges and universities

Panel session - preparing the engineers of 2020 - emerging e...

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Frontiers in Education (FIE) Conference

作者： Patrick T. Terenzini Lisa R. Lattuca Gul E. O. Kremer Carolyn Plumb Lois C. Trautvetter Center for the Study of Higher Education The Pennsylvania State University USA Faculty in Industrial The Pennsylvania State University USA College of Engineering Montana State University USA Higher Education Administration and Policy Program Northwestern University USA

This session will present preliminary findings from Prototyping the Engineer of 2020: A 360-degree study of Effective Education (P360), funded by the National Science Foundation. The study is designed to provide empirically based guidance for engineering programs seeking to recruit and retain diverse students and to prepare all new engineers for work in a changing global economy. Researchers identified six institutions that are, in different ways, already producing engineers with some of the attributes of the Engineer of 2020: Arizona State University, Harvey Mudd College, Howard University, MIT, the University of Michigan, and Virginia Tech. Brief presentations will identify educational and institutional practices and policies that appear to be especially effective in producing engineers with superior design, interdisciplinary, and contextual knowledge and skills. Presenters will also discuss linkages between effective curricula, instruction, and student experiences and supportive institutional cultures, practices, and policies.

关键词： Educational institutions Education Communities Springs engineering education Interviews Problem-solving

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