Search Results - "AMITAVA GUPTA"

A long baseline tracking network for improved NavIC orbit determination by Ramakrishna, B. N., Mishra, P. D., Subramanya Ganesh, T., Vashisth, Sharda, Gupta, Amitava Sen

“…Currently, the orbit determination accuracy of Navigation with Indian Constellation (NavIC) satellites is better than 20 m using the measurements from one-way…”
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Biometric and refractive changes following the monocular application of peripheral myopic defocus using a novel augmented-reality optical system in adults by Kubota, Ryo, Joshi, Nabin R., Fitzgerald, Tara J., Samandarova, Inna, Oliva, Maksud, Selenow, Arkady, Gupta, Amitava, Ali, Steven, Mitchell, G. Lynn, Chun, Robert, Ciuffreda, Kenneth J.

“…The prevalence of myopia is growing at an alarming rate and is associated with axial elongation of the eye. The cause of this undesirable physiological change…”
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Effect of short-term peripheral myopic defocus on ocular biometrics using Fresnel “press-on” lenses in humans by Kubota, Ryo, Joshi, Nabin R., Samandarova, Inna, Oliva, Maksud, Selenow, Arkady, Gupta, Amitava, Ali, Steven R.

“…This study assessed axial length and choroidal thickness changes following short-term peripheral myopic defocus in normal adult subjects. Twenty subjects…”
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Techniques for High Accuracy User Position Estimation Using NavIC Constellation by Ramakrishna, B. N., Mishra, P. D., Vashisth, Sharda, Sen Gupta, Amitava

“…The User Equivalent Range Error (UERE) accuracy of NavIC satellites performs better than 20 m based on operational orbit determination (OD) from sixteen IRIMS…”
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Detection, Acquisition and Processing of Fluorescence from Cold Atoms in Cesium Fountain Primary Frequency Standard at NPL, India by Acharya, Aishik, Arora, Poonam, Yadav, Suchi, Sen Gupta, Amitava

“…In this paper, detailed geometry of the detection chamber, configuration of detection probe laser beams, data acquisition and processing techniques of the cold…”
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Navigation with Indian Constellation and its Applications in Metrology by Bhardwajan, Aakanksha Avnish, Dakkumalla, Suresh, Arora, Anu, Ganesh, T. Subramanya, Sen Gupta, Amitava

“…Navigation with Indian Constellation (NavIC), also known as Indian Regional Navigation Satellite System (IRNSS), is an independent regional navigation…”
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Soft Tissue Coverage of the Elbow by Gupta, Amitava, MD, FRCS, Yenna, Zach, MD

“…Our discussion considers pedicled flaps about the elbow and free flaps. Local pedicle flaps are indicated in situations in which anatomic structures or…”
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Options for Surgical Exposure and Soft Tissue Coverage in Upper Extremity Trauma by Gupta, Amitava, MD, FRCS

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Development of cesium fountain frequency standard at the National Physical Laboratory, India by Gupta, Amitava Sen, Agarwal, Ashish, Arora, Poonam, Pant, Kavindra

“…We discuss the design and development of the cesium fountain frequency standard at the National Physical Laboratory, India. The optical set-up of the fountain…”
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NPLI Cesium Atomic Fountain Frequency Standard: Preliminary Results by Arora, P., Purnapatra, S. B., Acharya, A., Agarwal, A., Yadav, S., Pant, K., Gupta, A. S.

“…National Physical Laboratory India has developed a cesium atomic fountain frequency standard. The fountain has now become operational and is ready for complete…”
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Atomic clocks: A brief history and current status of research in India by ARORA, POONAM, AWASTHI, AMRITA, BHARATH, VATTIKONDA, ACHARYA, AISHIK, YADAV, SUCHI, AGARWAL, ASHISH, GUPTA, AMITAVA SEN

“…Frequency corresponding to the energy difference between designated levels of an atom provides precise reference for making a universally accurate clock. Since…”
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Design and development of atomic flux controller for cesium Fountain clock at NPL, India by Pant, Kavindra, Arora, Poonam, Yadav, Suchi, Gupta, Amitava Sen

“…In the present paper, the development of an electronic module for controlling the atomic flux from Cesium (Cs) Source (Cs ampoule) to the cooling chamber of…”
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Characterization of cold atomic cloud in a magneto-optical trap by Arora, Poonam, Chowdhury, Swatilekha, Agarwal, Ashish, Pant, Kavindra, Gupta, Amitava Sen

“…The results of characterization of cold cloud of cesium (Cs) atoms trapped in a magneto-optical trap (MOT) have been presented. The MOT is a part of the…”
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Systematic Uncertainty Evaluation of the Cesium Fountain Primary Frequency Standard at NPL India by Acharya, Aishik, Bharath, Vattikonda, Arora, Poonam, Yadav, Suchi, Agarwal, Ashish, Gupta, Amitava Sen

“…CSIR-NPL, India (NPLI) has developed its first Cesium atomic fountain (NPLI-CsF1). The indigenously developed fountain frequency standard is now fully…”
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Time delay handling in dominant pole placement with PID controllers to obtain stability regions using random sampling by Halder, Kaushik, Das, Saptarshi, Gupta, Amitava

“…This paper proposes a new formulation of proportional-integral-derivative (PID) controller design using the dominant pole placement method for handling…”
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Delay Handling Method in Dominant Pole Placement Based PID Controller Design by Das, Saptarshi, Halder, Kaushik, Gupta, Amitava

“…Time delay handling is a major challenge in dominant pole placement design due to variable number of poles and zeros arising from the approximation of the…”
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A novel fractional order fuzzy PID controller and its optimal time domain tuning based on integral performance indices by Das, Saptarshi, Pan, Indranil, Das, Shantanu, Gupta, Amitava

“…A novel fractional order (FO) fuzzy Proportional-Integral-Derivative (PID) controller has been proposed in this paper which works on the closed loop error and…”
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Tuning of an optimal fuzzy PID controller with stochastic algorithms for networked control systems with random time delay by Pan, Indranil, Das, Saptarshi, Gupta, Amitava

“…An optimal PID and an optimal fuzzy PID have been tuned by minimizing the Integral of Time multiplied Absolute Error (ITAE) and squared controller output for a…”
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On the selection of tuning methodology of FOPID controllers for the control of higher order processes by Das, Saptarshi, Saha, Suman, Das, Shantanu, Gupta, Amitava

“…In this paper, a comparative study is done on the time and frequency domain tuning strategies for fractional order (FO) PID controllers to handle higher order…”
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Performance analysis of robust stable PID controllers using dominant pole placement for SOPTD process models by Das, Saptarshi, Halder, Kaushik, Gupta, Amitava

“…•Dominant pole placement tuning of PID controllers is proposed for SOPTD processes.•Analytical expressions are derived considering 3 closed loop non-dominant…”
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