Sahadev Roy
@nitap,ac.in
Assistant Professor, Department of ECE
National Institute of Technology Arunachal Pradesh
RESEARCH, TEACHING, or OTHER INTERESTS
Electrical and Electronic Engineering, Industrial and Manufacturing Engineering, Multidisciplinary, Artificial Intelligence
Scopus Publications
Scholar Citations
Scholar h-index
Scholar i10-index
Scopus Publications
Arindam Mondal and Sahadev Roy
Inderscience Publishers
Md Faysal Kabir, , Sahadev Roy, and
Regional Association for Security and Crisis Management
: In this article, the hazard-based accident duration model and the reaction time due to various types of distractions are considered. This analysis is mainly considered T-junction or T-junctions like all other forms of road geometries which are more prone to accident. The model proposed is constructed by using a electronics devices along with driving simulator, to study the behavior of the yang inexperienced drivers as well as an experienced driver about their reaction by calling their phone from unknown numbers intentionally. The results show that drivers distracted by mobile phones uses the hard breaking due to least available time to respond after identification of an event. Some of the research and theory bearing on decision making and risk perception, driver situation awareness, and possible mediators of risk-taking is also analyzed here.
Kaushal Mukherjee, Subhadeep Mukhopadhyay, and Sahadev Roy
Inderscience Publishers
Arindam Mondal and Sahadev Roy
Inderscience Publishers
Md Faysal Kabir and Sahadev Roy
Inderscience Publishers
Md Faysal Kabir and Sahadev Roy
Elsevier BV
Aditya Roy and Sahadev Roy
Wiley
SummaryA well‐optimized and well‐performed communication network protocol is necessary to build successful underwater acoustic sensor networks (UWASNs). But for wired and wireless communication, medium access control (MAC) has a great effect on network performance and optimization. But unlike land‐based MAC protocols, underwater MAC protocols come with various challenges and issues like high propagation delay, limited bandwidth for communication signals, large attenuation in network signals, and the high noise level in signals. It is very challenging to build a well‐optimized underwater MAC protocol. Also, in UWASN, sensor nodes are generally divided into sub‐network parts to reduce the propagation delay of data signals. But this creates the problem of non‐uniform traffic load in sensor nodes. So, considering these issues, dynamic hold time MAC (DHT‐MAC) protocol is proposed here. In this protocol, depending on the distance from the central node, sensor nodes are divided into two sub‐network zones (parent node and child node). Depending on the traffic load and propagation delay, the child nodes can change their respective parent nodes dynamically. Advantage of the proposed method is that, if any of the parent nodes stops working, the child node will connect to the nearest parent node. When collecting the data signals, it has been observed that child nodes have a light traffic load compared to parent nodes. So dynamic cooperative transmission MAC (DCT‐MAC) protocol which is a contention‐based MAC protocol has been used in child nodes and as parent nodes have high traffic load, reservation‐based MAC protocol has been used.
Kaushal Mukherjee, Subhadeep Mukhopadhyay, and Sahadev Roy
Wiley
SummaryIn this article, a wideband planar antenna is proposed for 5G mobile communications, satellite communication, and Internet of Things (IoT)‐enabled applications. The proposed antenna consists of a rectangular radiating patch and two I‐shaped tuning stubs, excited by two I‐shape microstrip lines. The antenna of size (17 × 20 × 1) mm3 is designed using FR4 material having a dielectric constant ( ) of 4.4. Simulated results illustrate that the antenna operates with a radiation efficiency of 90% and a peak gain of 9.33 dBi. The achieved bandwidth of 161.54 GHz ranging from 31.6 to 193.14 GHz covers the licensed and planned bands of 5G communication (n257, n258, n259, n260, and n261). This antenna will support lower bands within 30 GHz (X, K, Ka, middle frequency bands), within 110 GHz (Q, U, V, W, F bands), and upper‐frequency bands up to 170 GHz (D‐band) used for satellite communication. The IoT framework is required to be updated, by ultra‐high‐speed antennas, which will improve the user experience in the fields like agriculture, communication, education, and transportation. A comparative study between the proposed antenna and other existing antennas with supporting results such as VSWR, impedance bandwidth, radiation efficiency, and gain is also presented in this work.
Ajay Kumar Singh, Ajay Yadav, Arasad Ali Khan, Sahadev Roy, and Hira Lal Yadav
Elsevier BV
Kaushal Mukherjee, Subhadeep Mukhopadhyay, and Sahadev Roy
Wiley
SummaryA small wideband Y‐shaped antenna is presented in this paper. A monopole of Y‐shaped with two rectangular‐shape frequency shifting strip is used to produce a compact dimension of 10 mm × 12 mm on a 1‐mm‐thick FR4 substrate. The antenna has an impedance bandwidth (measured below −10 dB from 39.57 to 44.63 GHz), a gain more than 4.9 dB, radiation efficiency of 81%, and voltage standing wave ratio (VSWR) < 2, within the bandwidth of interest, making it a viable option for 5G applications. The use of a (01.7850 × 2.6775 × 00.02) mm3 metallic strip located above the feed line is also shown to efficiently increase the antenna bandwidth to values greater than 5 GHz without affecting the other antenna parameters. Additionally, the measured results in comparison with the simulated results reveal negligible changes, confirming that the proposed antenna is also suitable for the applications of 5G with Internet of Things.
Sahadev Roy and Sudipta Chatterjee
Inderscience Publishers
Aditya Roy, Subhadeep Mukhopadhyay, and Sahadev Roy
IEEE
Technologies in various fields are developing and growing rapidly as science is getting better and more optimized. Most of this development are introduced to make the human life better and modernized with the cost of more environmental problems. Water pollution is one of the most alarming factors among various environmental pollutions. Fresh and clean water supply is the basing need for all of the living organisms in this planet. So, monitoring various water parameters in real-time like turbidity, pH, temperature, dissolved oxygen (DO) level, conductivity, etc. is becoming more and more important. In this paper, a modular and cost-effective real-time water parameter monitor system has been proposed. This system is equipped with various sensor nodes to monitor various physical and chemical parameters of water. And then the measured data will be sent to a secure IoT cloud server autonomously to be viewed on the internet using a web page. Also cloud computing method will be used which will compare gathered data with set-threshold value and result will be displayed to the user. Depending on this result a water-supply valve can be de controlled.
Kaushal Mukherjee, Sahadev Roy, and Subhadeep Mukhopadhyay
IEEE
This study presents a Single Input Single Output (SISO) antenna as an alternative to multiple-input multiple-output (MIMO) antenna systems for automotive applications. The proposed system can be installed on the vehicle’s roof in a low-profile enclosure. With appropriate physical dimensions, each MIMO system delivers excellent performance across the whole band. However, significant coupling with resonating sections is the fundamental issue with MIMO antennas. In this study, a review of several MIMO antennas will be undertaken to determine the feasibility of moving away from typical Sub-6 GHz 5G frequency bands and the 5.9 GHz band to mm-Wave bands SISO antenna systems for Intelligent Transportation System (ITS). The proposed Y-Shape SISO antenna covers the major mm-Wave 5G frequency bands of 26.5 GHz and 2S GHz with a peak gain of 4.9 dB, radiation efficiency of 81%, maximum VSWR of 1.6, and wider bandwidth of 5 GHz. In the result analysis section, a detailed comparison of the proposed SISO Y-Shape antenna with current works based on MIMO antennas suited for automotive applications is also provided to determine the suitability of the proposed antenna in an automotive environment and ITS.
Aditya Roy, Subhadeep Mukhopadhyay, and Sahadev Roy
IEEE
As the technologies in different fields are developing rapidly to improve society for the betterment of human life, more and more environmental problems are arising. Water is one of the most crucial elements for human life to sustain on this planet. So to monitor the coantinuous supply of filtered and purified water is becoming more important nowadays. Now, most of the monitoring systems that are present today are not automated and also equipped with the same repeated process and also very time-consuming. In this proposed work we present a water quality monitoring system that will be consists of various spring water quality measuring sensors, microcontroller for processing gathered data and various communication systems for node communication with the cloud server. To access the gathered data from remote places various monitoring system and the Internet of Things (IoT) is implicated in the system. And to display spring water quality data in an interactive form on the user side, a separate cloud server can be used and a unique IP address can be provided so a user can access the collected data. Also, the gathered values will be compared with standard values and if the values are above the set-threshold value, an automated warning SMS alert will be sent to the user. The uniqueness of the proposed system is modularity, low power consumption, and low propagation delay.
Ajay Yadav, Amit Prakash, Ajay Kumar, and Sahadev Roy
Elsevier BV
J. Borah, S. Baruah, T. A. Sheikh, and S. Roy
Allerton Press
Sudipta Chatterjee and Sahadev Roy
Elsevier BV
Kaushal Mukherjee, Subhadeep Mukhopadhyay, and Sahadev Roy
Allerton Press
Roy Sahadev, Mukherjee Kaushal, and Arindam Biswas
Wiley
Kaushal Mukherjee, Amitesh Das, and Sahadev Roy
Springer Singapore
Atrayee Dutta, Manjima De Sarkar, and Sahadev Roy
Springer Singapore
Manjima De Sarkar, Atrayee Dutta, and Sahadev Roy
Springer Singapore
Garima Singhal and Sahadev Roy
Springer Singapore
Janmoni Borah, Tasher Ali Sheikh, and Sahadev Roy
The Korean Institute of Electrical and Electronic Material Engineers
This paper presents a unique and miniaturized dual-band coplanar waveguide (CPW-fed) antenna for modern wireless communication. A new technique of using a modified ground structure (MGS) and frequency shifting strips (FSS) has been employed in the design to achieve dual-frequency operation. The proposed antenna generates two separate impedance bandwidths and covers the minimum required frequency bands of GSM 1800, GSM 1900, and Wi-Fi/WLAN 5 GHz. The proposed antenna is relatively small (17 × 20 mm 2 ) and operates over frequency ranges 1.51~2.06 and 4.43~6.70 GHz. The designed antenna was simulated using Ansoft HFSS, a FEM based simulator, and antenna characteristics, such as reflection coefficient, gain, radiation efficiency, radiation pattern, impedance bandwidth, VSWR, surface current, and electric field distributions, are reported in this paper. The effect of the antenna’s key structural parameters on its performance is also analyzed.
B. Supraja, N. Ravi, and T. Jayachandra Prasad
CRC Press