Indian Institute of Information Technology

Chittoor, India

Indian Institute of Information Technology

Chittoor, India
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Lekkala K.K.,Indian Institute of Information Technology | Mittal V.K.,Indian Institute of Information Technology
IEEE Region 10 Annual International Conference, Proceedings/TENCON | Year: 2017

In this paper, we propose a robotic video surveillance system. A prototype system is implemented on an aerial vehicle, a quadcopter. It is capable of following a person or any moving object, while simultaneously localizing it, i.e., measuring the coordinates of the quadcopter on a scaled map. The system can operate well, even if it is flying in an unknown and GPS-silent environment. The prototype system consists of 3 major modules. First is an 'Image-based Visual Servoing (IBVS)' module for tracking the desired object or person, and sending the error parameters to the actuators. The second module is 'Parallel Tracking and Mapping (PTAM)' module. The third module is an 'Extended Kalman Filter (EKF)' module. The PTAM and EKF modules help in estimating the location of the quadcopter at every time-instant. The proposed system enables the quadcopter to follow the desired object smoothly, while keeping the tracked object in the center of the frame and maintaining a constant distance from the object. The effectiveness of the system is validated by computing the precise measurements of the aerial movements, while ensuring the minimal error. The proposed method can be helpful for quadcopters used in diverse applications such as surveillance, monitoring and tracking a desired object. © 2016 IEEE.


Sarkar B.,Hanyang University | Samanta S.,Indian Institute of Information Technology
International Journal of Computational Intelligence Systems | Year: 2017

Graphs are the backbone of many real systems like social networks, image segmentation, scheduling, etc. To input uncertainty to such systems, generalized fuzzy graphs are used. Generalized fuzzy tree is one generalized fuzzy subgraph of a generalized fuzzy graph which characterizes the whole graph. In this study, generalized fuzzy trees are introduced. The concepts of strongly connectedness, nearly disconnect, distance between two nodes, bridges are exemplified. © 2017, the Authors.


Naidu V.,International Institute of Information Technology, Hyderabad | Kotamraju S.,Indian Institute of Information Technology
Materials Science Forum | Year: 2017

Silicon Carbide (SiC) based MOS devices are one of the promising devices for high temperature, high switching frequency and high power applications. In this paper, the static and dynamic characteristics of an asymmetric trench gate SiC IGBT with high-K dielectrics- HfO2 and ZrO2 are investigated. SiC IGBT with HfO2 and ZrO2 exhibited higher forward transconductance ratio and lower threshold voltage compared to conventionally used SiO2. In addition, lower switching power losses have been observed in the case of high-K dielectrics due to reduced tail current duration. © 2017 Trans Tech Publications, Switzerland.


Singh S.,Indian Institute of Information Technology | Kondekar P.N.,Indian Institute of Information Technology, Design and Manufacturing
Journal of Computational Electronics | Year: 2017

This work investigates a process-variation resilient electrostatically-doped ferroelectric Schottky-barrier tunnel FET (ED-FE-SB-TFET) based on negative capacitance (NC). The key attributes of ED-FE-SB-TFET are perovskite ferroelectric (FE) gate stack-induced NC behavior and electrostatic doping to induce pockets at both source/drain and channel interfaces. The positive feedback among the electric dipoles in FE material leads to intrinsic voltage amplification and enhanced gate controllability, thus it facilitates faster switching transitions. The proposed ED-FE-SB-TFET endeavors to create a substantial reduction in the ambipolar current ((Formula presented.)), steep sub-threshold slope, paramount boost in drive current, lower drain-induced barrier-lowering, and enhanced scalability. It also obviates the need for metallurgical doping, hence ion-implantation or dopant segregation techniques employed for planar SB-TFETs pocket-doping are no longer required, and it also modifies effective Schottky barrier height and Schottky tunneling barrier width significantly to enhance the device behavior. It offers a simplified fabrication process, and it is highly resilient towards process variations, doping control issues, and random dopant fluctuations. Moreover, there is a reduced thermal budget that facilitates its fabrication on single crystal silicon-on-glass substrate realized by wafer scale epitaxial transfer. Results reveal its potential as strong candidate for next generation, scaled and low power applications. © 2017 Springer Science+Business Media New York


Sharma P.,Indian Institute of Information Technology | Kumar V.D.,Indian Institute of Information Technology
IEEE Photonics Technology Letters | Year: 2017

This is the first report on investigation of CMOS compatible hybrid insulator metal insulator (HIMI) planar plasmonic waveguide based components. In the presented work a realistic planar HIMI plasmonic waveguide, which offers good balance between propagation length (253 μm) and confinement (38%), has been studied at 1.55 μm operating wavelength for designing various waveguide components. Key components such as 90°, S and U-shaped bends have been investigated and their transmission and loss characteristics have been analyzed at different bend radii. The components exhibit transmittance up to 80% at various bend radii within a confinement area of 0.25×0.04 μm². This investigation could be fruitful in designing plasmonic integrated circuits for chip scale applications. IEEE


Verma V.S.,Indian Institute of Information Technology | Kumar Jha R.,Indian Institute of Technology Patna
Signal, Image and Video Processing | Year: 2015

In this paper, a blind watermarking scheme based on significant difference of lifting wavelet transform coefficients has been proposed. The difference between two maximum coefficients in a block is called as significant difference. Embedding of binary watermark has been done based on the largest coefficient of randomly shuffled blocks of CH3 sub-band. This sub-band is quantized using the predefined threshold value by comparing the significant difference value with the average of significant difference value of all blocks. The watermarked image shows no perceptual degradation as the PSNR value exceeds 42 dB. An adaptive-thresholding-based method is used for watermark extraction. In the proposed technique, the benefit of using lifting wavelet over traditional wavelet is the maximum energy compaction property, which helps in resisting different attacks. The simulation results show higher performance of the proposed technique as compared to the similar existing techniques under different geometric and nongeometric attacks such as amplification, median filtering, sharpening, scaling, rotation, Gaussian noise, salt and paper noise, Gaussian filter and JPEG compression. © 2014, Springer-Verlag London.


Sadagopan S.,Indian Institute of Information Technology
IT Professional | Year: 2012

IT in India has seen amazing growth, thanks to the liberalization of economic policies, conducive government policies, growth in higher education, and the uptake in entrepreneurship. However, unless Indian education and research (on the supply side), IT companies (on the demand side), and the government and media (enablers) continue to innovate, India might not be able to sustain its current leadership position. This article is part of a special issue on IT in Emerging Markets. © 1999-2012 IEEE.


Jain P.,Indian Institute of Information Technology
ACM International Conference Proceeding Series | Year: 2015

A sensor network deployed at international borders requires extreme level of security. The sensor network is supposed to be forensic ready so that at the time of crime and after the crime proper proofs can be displayed before the court of law. The current research work deals with an intelligent multi agent system deployed at multiple sinks in a wireless sensor network. The sensed data is made forensic ready so that it can presented before the court of law. © 2015 ACM.


Selvajyothi K.,Indian Institute of Information Technology | Janakiraman P.A.,Indian Institute of Technology Madras
IEEE Transactions on Power Delivery | Year: 2010

A simple and robust procedure with good transient response is proposed for d-q voltage control in conjunction with harmonics reduction in the output of stand-alone single-phase inverters. The distortion in the load voltage waveform is mainly due to the voltage drop in the filter-inductor caused by the harmonic components of the current. For extracting the in-phase and quadrature signals from harmonic-rich periodic waveforms, a composite observer has been developed, which is faster and more accurate than a simple observer. Separate observers have been provided for the voltage and current signals. Feed forward compensation has been obtained by using the quadrature components derived from the composite current observer. Further, an Inverter could be modeled as a feed back control system with the fundamental component as the desired output and the harmonics as the noise creeping into the output. The well-known control strategy of using a large feed back around the noise signal can be employed to reduce its effect at the output, exhibiting low total harmonic distortion under non-linear loads. The controllers can be easily modeled in the discrete-time domain and the ideas can be directly implemented digitally for single-phase inverters controlled by FPGA or DSP chips. © 2010 IEEE.


News Article | December 5, 2016
Site: www.businesswire.com

SHERMAN OAKS, Calif.--(BUSINESS WIRE)--LendingUSA, a leading provider of point of sale financing solutions, has announced Manoj Mathew as its new Chief Technology Officer. Manoj, a widely recognized and influential member of the marketplace lending technology community, is a seasoned leader with over 20 years of experience working with IT and product engineering companies. An alumnus of the prestigious Indian Institute of Information Technology, Manoj specializes in the execution of strategic initiatives that align customer and future market demands, and has obtained 7 U.S. Patents, with several more patent pending applications. As CTO, Manoj will apply his combined engineering and business background to provide thought leadership and guidance for LendingUSA, which uses a proprietary lending solution that allows customers to apply for financing directly at the point of sale and receive a decision within seconds. “Manoj is a brilliant technologist and fintech visionary with a deep understanding and passion for next-generation technology, problem solving, and market dynamics,” says Camilo Concha, CEO of LendingUSA. “He has invaluable perspective and insight on how to use technology to power progress, improve the user experience, and seamlessly meet the customer’s needs. We’re thrilled to be working with him.” His previous experience includes being the co-founder and Chief Technology Officer of LendFoundry, a fintech accelerator platform for marketplace lending. He was also a co-founder and senior executive at Sigma Infosolutions, a leader in business and IT solutions for both large and small enterprises. During his time at Sigma, he was instrumental in the design and architecture of the origination platform for loanDepot, QuickBridge and the servicing system deployed for Rocketloans. Additionally, as a Senior Systems Engineer, Manoj was a development lead at Finacle, a core banking product by Infosys, which serves 450 million customers across 84 countries. He has also been involved with several computer vision, GPGPU-based image processing and machine learning initiatives at Canon Information and Imaging Solutions. He writes regularly about marketplace lending and has spoken about fintech at major industry conferences including Lendit. “LendingUSA is one of the key innovators in the marketplace lending community, and being a part of a dynamic team with a transformational vision challenges the norm,” says Manoj of the appointment. “They’re using technology in a way that revolutionizes financing for both the merchant and the borrower, and I’m excited to work with them on optimization and strategy as they continue to expand their footprint in the point of sale financing industry.” LendingUSA specializes in point of sale and direct-to-consumer financing solutions with a special focus on a wide range of medical services and consumer goods. The company’s proprietary technology combines traditional and next generation underwriting and fraud detection techniques to approve loan applications in real-time – often in a matter of seconds. LendingUSA builds strong relationships with its merchant partners by providing the tools and training necessary for them to provide the appropriate financing to customers at their point of need. All loans are made by Cross River Bank, a New Jersey State Chartered bank, Member FDIC.

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