PhD Theses
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Design and Analysis of Privacy Models against Background Knowledge in Privacy - Preserving Data Publishing
(Dhirubhai Ambani Institute of Information and Communication Technology, 2021)"Humongous amount of data gets collected by various online applications like social networks, cellular technologies, the healthcare sector, location - based services, and many more. The collected data can be accessed by ... -
Copy-Move Tampering: Some New Approaches of the Detection and Localization in a Digital Image
(Dhirubhai Ambani Institute of Information and Communication Technology, 2022)Images speak. They tell us stories. Digital images carry plethora of information. The availability of cost-effective digital camera-enabled devices has made capturing images a child’s play. Statistics witnesses that the ... -
Entity Based Query Processing For Retrieval And Summarization In Biomedical Domain
(Dhirubhai Ambani Institute of Information and Communication Technology, 2021)Exponential growth of biomedical literature poses different challenges in searching. To address complex information needs of the users, rigorous semantic processing of biomedical text is required. Biomedical information ... -
Design of Broadband Microwave Absorbers using Carbonyl Iron Filled Silicon Rubber Sheets in the Frequency Range of 1 to 8.2 GHz
(Dhirubhai Ambani Institute of Information and Communication Technology, 2022)For microwave absorber applications, carbonyl iron (CI) powder is a commonly used filler material in silicon rubber because of the high value of attenuation coefficients (50.56 dB/cm), high curie temperature, good temperature ... -
Spatial and spectral regularization in unmixing of remotely sensed data
(Dhirubhai Ambani Institute of Information and Communication Technology, 2021)The hyperspectral imaging opens the broad possibilities for remote sensing data analysis with it’s rich spectral information. However, this has a trade-off with limited spatial details due to the presence of several hardware ... -
Compact Circularly Polarized Tri-, Dual- and Single-Band Dielectric Resonator Antennas
(Dhirubhai Ambani Institute of Information and Communication Technology, 2021)The Dielectric Resonator Antennas (DRAs) have received wide attention due to low loss, high radiation efficiency, small size, wider bandwidth and simple feed network as compared to the microstrip antennas. Microstrip ... -
Impact of Weather Conditions on Macroscopic Traffic Stream Variables in an Intelligent Transportation System
(Dhirubhai Ambani Institute of Information and Communication Technology, 2021)"Accurate prediction of the macroscopic traffic stream variables such as speed and flow is essential for the traffic operation and management in an Intelligent Transportation System (ITS). Adverse weather conditions like ... -
Design and Simulation of Single Electron Transistor Based High-Performance Computing System at Room Temperature
(Dhirubhai Ambani Institute of Information and Communication Technology, 2021)"The VLSI technology has seamlessly grown over the years, that yields high-performance, low-power and high-density devices. Over the several decades, the performance of existing complementary metal-oxide semiconductor ... -
Design and Performance Comparison of Novel High Q Coaxial Resonator Filter for Ka-band High Throughput Satellite
(Dhirubhai Ambani Institute of Information and Communication Technology, 2021)The filters deployed in the satellite are high-performance filters that have very stringent in-band and out of band performance. They require high Q resonators with spurious free-range for their realization. But, the Q ... -
Privacy and accountability in cloud computation and storage
(Dhirubhai Ambani Institute of Information and Communication Technology, 2021)Cloud computing is a cost-effective computing paradigm for convenient, ondemand data access to a shared pool of configurable computing resources such as networks, servers, storage, applications, and services. While providing ... -
Vector graph representation for 3D meshes and algorithms for mesh deformation, enveloping, interpolation and morphing
(Dhirubhai Ambani Institute of Information and Communication Technology, 2021)The performance of the tools developed for graphics and animation depends on the underlying representation of the geometric model of the objects. The geometric model in turn describes the geometry of the real world object. ... -
Design of spoof speech detection system : teager energy-based approach
(Dhirubhai Ambani Institute of Information and Communication Technology, 2021)Automatic Speaker Verification (ASV) systems are vulnerable to various spoofing attacks, namely, Speech Synthesis (SS), Voice Conversion (VC), Replay, and Impersonation. The study of spoofing countermeasures has become ... -
Classification Techniques of PolSAR Images
(Dhirubhai Ambani Institute of Information and Communication Technology, 2021)Over the years, optical remote sensing technology has restricted the ability to capture images during harsh weather settings and at night time. However, Synthetic Aperture Radar (SAR) is independent of solar illumination ... -
Facial expression recognition: feature based approaches to deep learning techniques
(Dhirubhai Ambani Institute of Information and Communication Technology, 2020)Facial expression recognition (FER) is a problem of pattern recognition that invites the attention of computer vision researchers for the last three decades. However, the problem is still alive due to challenges such as - ... -
Voice conversion: alignment and mapping perspective
(Dhirubhai Ambani Institute of Information and Communication Technology, 2019)Understanding how a particular speaker is producing speech, and mimicking one's voice is a difficult research problem due to the sophisticated mechanism involved in speech production. Voice Conversion (VC) is a technique ... -
Investigating into a light-weight reconfigurable VLSI architecture for biomedical signal processing applications
(Dhirubhai Ambani Institute of Information and Communication Technology, 2019)The Body Sensor Network systems consist of signal acquisition and processing blocks along with Power Management Unit and radio transmission capabilities. The high power consumption of the radio transmission is often ... -
Compressive sampling architecture for wideband communication
(Dhirubhai Ambani Institute of Information and Communication Technology, 2020)This dissertation proposes a novel Compressive Sampling (CS) scheme for Sub-Nyquist Spectrum Sensing (SNSS) of spectrally sparse wideband signals. A novelty of our proposed SNSS scheme resides in the analog front-end. We ... -
On heterogeneous distributed storage systems: bounds and code constructions
(Dhirubhai Ambani Institute of Information and Communication Technology, 2019)In Distributed Storage Systems (DSSs), usually, data is stored using encoded packets on different chunk servers. In this thesis, we have considered heterogeneous DSSs in which each node may store a different number of ... -
3D shape deformations : a lie group based approach
(Dhirubhai Ambani Institute of Information and Communication Technology, 2020)3D shapes are ubiquitous in many fundamental tasks of computer graphics and geometry processing. For many applications, new shapes have to be generated from the existing ones, for which it it imperative to understand and ... -
Investigation into radiation hardening techniques on differential receiver and power management unit in 0.8um CMOS for space applications
(Dhirubhai Ambani Institute of Information and Communication Technology, 2019)This report details out radiation hardening techniques, their implementation on Di erential Receiver and Power Management Unit. Dierential Receiver ASIC is designed with addressable, synchronous and asynchronous features ...