Abstract: Transimpedance amplifiers (TIAs) are widely used to translate the current output of sensors like photodiode-to-voltage signals, since many circuits and instruments can only accept voltage input. An operational amplifier with a feedback resistor from output to the inverting input is the most straightforward implementation of such a TIA. However, even this simple TIA circuit requires ca...

This paper proposes a hybrid technique for secured optimal power flow coupled with enhancing voltage stability with FACTS device installation. The hybrid approach of Improved Gravitational Search algorithm (IGSA) and Firefly algorithm (FA) performance is analyzed by optimally placing TCSC controller. The algorithm is implemented in MATLAB working platform and the power flow security and voltage...

IRCCS Fondazione Stella Maris and Fondazione Imago 7, Calambrone, Pisa, Italy We present a feasibility study that has been carried out to determine the best power regulation strategy for the PET front-end electronics of the trimodal PET/MRI/EEG TRIMAGE scanner. Conventional power regulation strategies cannot be applied to PET/MRI because standard switching regulators stop working in presence of...

Received Jan 9, 2018 Revised Mar 2, 2018 Accepted Mar 18, 2018 The objective of this paper is to predict the secure or the insecure state of the power system network using a hybrid technique which is a combination of Artificial Neural Network (ANN) and voltage stability indexes. Voltage collapse or an uncontrollable drop in voltage occurs in a system when there is a change in the condition of t...

BACKGROUND Cardiovascular autonomic neuropathy (CAN) is a common complication of diabetes mellitus. AIM To assess the manifestations of CAN on ECG at rest. SUBJECTS AND METHODS 100 type I diabetic patients, mean age 36.5 (range 17-62) years, mean duration of diabetes 14.6 (range 0-49) years were examined. The control group consisted of 88 healthy subjects, mean age 37 (range 15-65) years. C...

Maintaining voltage stability is an important factor in modern power system study and operation. Supplementing the with reactive (VAr) support devices such as FACTS helps to overcome instability issues. Commonly, dynamic optimization based method employed Voltage Stability Analysis (VSA) of system. The existing approach has dependencies on availability specific tools model perform VSA. Besides,...

Today’s changing electric power systems create a growing need for flexibility, reliability, fast response and accuracy in the fields of electric power generation, transmission, distribution and consumption. Power system networks are complex systems that are nonlinear, disturbances and faults. It can be accomplished by improving the voltage profile, enhancement of voltage stability and by reduci...

Three-dimensional (3D), multi-transistor-layer, integrated circuits represent an important technological pursuit promising advantages in integration density, operation speed, and power consumption compared with 2D circuits. We report fully functional, 3D integrated complementary metal-oxide-semiconductor (CMOS) circuits based on separate interconnected layers of high-mobility n-type indium arse...

Ac signals are accurately measured by using Thermal Converters (TCs). In this paper, ac voltages are automatically calibrated as an example by the Thermal Voltage Converter (TVC) with changing the sequence of the applied signals. 1 V, 10 V, and 100 V at different frequencies from 50 Hz to 100 kHz are measured. The three different sequences are sequence #1 which is (+dc, ac, -dc), sequence #2 wh...