Sagar Dasgupta

• Master of Science
• Graduate Research Assistant at University of Alabama

Digital twin (DT) systems aim to create virtual replicas of physical objects that are updated in real-time with their physical counterparts and evolve alongside the physical assets throughout their lifecycle. DT technology promises to significantly enhance the capabilities of intelligent transportation systems (ITS) through improving safety and mob...

Digital twin (DT) systems aim to create virtual replicas of physical objects that are updated in real time with their physical counterparts and evolve alongside the physical assets throughout its lifecycle. Transportation systems are poised to significantly benefit from this new paradigm. In particular, DT technology can augment the capabilities of...

This paper presents a sensor fusion-based Global Navigation Satellite System (GNSS) spoofing attack detection framework for autonomous vehicles (AVs) that consists of two strategies: (i) comparison between predicted location shift—i.e., distance traveled between two consecutive timestamps—and inertial sensor based location shift in addition to moni...

In a connected transportation system, adaptive traffic signal controllers (ATSC) utilize real-time vehicle trajectory data received from vehicles through wireless connectivity (i.e., connected vehicles) to regulate green time. However, this wirelessly connected ATSC increases cyber-attack surfaces and increases their vulnerability to various cyber-...

Sense of hearing is crucial for autonomous vehicles (AVs) to better perceive its surrounding environment. Although visual sensors of an AV, such as camera, lidar, and radar, help to see its surrounding environment, an AV cannot see beyond those sensors line of sight. On the other hand, an AV s sense of hearing cannot be obstructed by line of sight....

Human trafficking is a universal problem, persistent despite numerous efforts to combat it globally. Individuals of any age, race, ethnicity, sex, gender identity, sexual orientation, nationality, immigration status, cultural background, religion, socioeconomic class, and education can be a victim of human trafficking. With the advancements in tech...

A resilient positioning, navigation, and timing (PNT) system is a necessity for the robust navigation of autonomous vehicles (AVs). A global navigation satellite system (GNSS) provides satellite-based PNT services. However, a spoofer can tamper the authentic GNSS signal and could transmit wrong position information to an AV. Therefore, an AV must h...

A transportation digital twin represents a digital version of a transportation physical object or process, such as a traffic signal controller, and thereby a two-way real-time data exchange between the physical twin and digital twin. This paper introduces a digital twin approach for adaptive traffic signal control (ATSC) to improve a traveler's dri...

An adaptive traffic signal controller (ATSC) combined with a connected vehicle (CV) concept uses real-time vehicle trajectory data to regulate green time and has the ability to reduce intersection waiting time significantly and thereby improve travel time in a signalized corridor. However, the CV-based ATSC increases the size of the surface vulnera...

A resilient and robust positioning, navigation, and timing (PNT) system is a necessity for the navigation of autonomous vehicles (AVs). Global Navigation Satelite System (GNSS) provides satellite-based PNT services. However, a spoofer can temper an authentic GNSS signal and could transmit wrong position information to an AV. Therefore, a GNSS must...

This paper presents a sensor fusion based Global Navigation Satellite System (GNSS) spoofing attack detection framework for autonomous vehicles (AV) that consists of two concurrent strategies: (i) detection of vehicle state using predicted location shift -- i.e., distance traveled between two consecutive timestamps -- and monitoring of vehicle moti...

In this study, a sensor fusion based GNSS spoofing attack detection framework is presented that consists of three concurrent strategies for an autonomous vehicle (AV): (i) prediction of location shift, (ii) detection of turns (left or right), and (iii) recognition of motion state (including standstill state). Data from multiple low-cost in-vehicle...

The monitoring of urban roadway traffic state is an essential task for the efficient operation of urban transportation system and mobility of urban population at scale. Current practices of sensing urban traffic are primarily based on embedded sensors (e.g., loop detector) on a roadway or roadside sensors (e.g., roadside camera) and the crowdsourci...

Global Navigation Satellite System (GNSS) provides Positioning, Navigation, and Timing (PNT) services for autonomous vehicles (AVs) using satellites and radio communications. Due to the lack of encryption, open-access of the coarse acquisition (C/A) codes, and low strength of the signal, GNSS is vulnerable to spoofing attacks compromising the navig...

Additive manufacturing is the buzz word these days and many companies are leaning on this technology to leap forward in un-chartered design space that promises to give better performance at impossible to reach design goals with the current manufacturing methods. This paper addresses recent developments that have occurred in Energy related businesse...

The Electronics industry is continually strives to achieve improve performance and smaller scales. Both of these targets result in increased heat flux densities within the electronic devices. Mainly from the portable devices which are the market driving forces; this increasing heat flux densities are leading to new methodologies being implemented t...

India is one of the fastest growing economies of the world. Energy is the central factor for sustainable development. For a real development model the environment should be kept pollution free so need of green technology arises worldwide. This paper presents a model of an evaporative cooler for humid regions which is energy efficient as well as thi...

In the modern warfare supersonic fighter jets plays a vital role. German scientists made a breakthrough at the time of World War II by introducing delta wing which is a delta like wing platform. With time aerospace industry has evolved keeping the basic delta structure same but introducing different flow control methods. This paper is a compi...