Rajendra Bunkar ¹, Ram Asrey ¹, K. D. Vyas ¹, V. K. Rao ¹, Sunil Kumar ¹, A. R. Srivastava ¹, M. P. Kaushik ¹

Affiliations
1 Defence Research & Development Establishment (DRDE), Jhansi Road, Gwalior, M.P., 474002, IN

Abstract

The sulfur mustard (SM) vapor sensitive property of polyepichlorohydrin (PECH) polymer coating was investigated by using quartz crystal microbalance (QCM) sensor. The measurements were based on the frequency shifts (Hz) due to the sorption of SM vapor in the polymer coating of the modified QCM. The response of QCM sensor was found to be about 410 Hz for SM vapors. The influences of coating thickness and temperature on the sensor response were examined. The sensor showed optimum response and reversibility at 4 KHz of coating thickness and lower temperature. The relevant detection parameters like sensitivity, reversibility and reproducibility were evaluated for SM detection.

Keywords

PECH, QCM, Sulfur Mustard, Response, Reversibility

Full Text

   

Sunil Kumar ¹, Vikas Rastogi ², Pardeep Gupta ¹

Affiliations
1 Sant Longowal Institute of Engineering and Techonology, IN
2 Delhi Technological University, Delhi, India, IN

Abstract

Objective: The ocean resources and scientific related research is an attractive research topic. To witness a significant development of an intelligent robotic underwater work system, it is necessary to present various technological advancements in this area in form of technical review. Methods/Statistical Analysis: In this direction, authors provide a comprehensive assessment of recent developments of underwater robots and their various control strategies. This review highlights the different control techniques of underwater robots, which have been investigated for overall control of underwater robots. These controls include motion control, trajectory control of end-effect or for the underwater robot manipulators, thrust control and force control. Finding: Various control strategies have been developed and employed by researchers such as adaptive control, PID control, Sliding Mode Control (SMC), robust/optimal control, and robust overwhelming control. The literature survey has further emphasized the use of such controllers for motion, thrust and force control in underwater robotic conditions. Application: This article will be beneficial for researchers in this area to understand various applications of underwater robots. Another focus of this paper is to provide a candid commentary on modeling and simulation techniques adopted by various researchers in the area of underwater robots.

Keywords

Modeling, Trajectory Control, Thrust Control, Underwater Dynamics, Underwater Robot.

Full Text

   

Sunil Kumar ¹, Sumit Mittal ², Manpreet Singh ³

Affiliations
1 Department of Computer Science, Guru Nanak College for Girls, Sri Muktsar Sahib –152026, Punjab, IN
2 Maharishi Markandeshwar Institute of Computer Technology and Business Management, Maharishi Markandeshwar University, Mullana, Ambala – 133203, Haryana, IN
3 Department of Computer Science and Engineering, Maharishi Markandeshwar University, Sadopur, Near Omaxe Flats, Ambala-Chandigarh Highway, Ambala – 133001, Haryana, IN

Abstract

Objectives: To make an extensive survey on various meta-heuristic and hybrid task scheduling along with their classification patterns and to find the scope of improvement in these techniques. Method: This paper carries to the deep study of 99 reputed research papers from Springer, IEEE, Elsevier, Scopus indexed; SCI indexed of well-known renowned journals. These research papers are selected by taking into consideration of relevance to research area. These scheduling algorithms are compared in terms of their performance metrics, environments and results. Findings: This paper described that there are various renowned researchers who have proposed various meta-heuristic task scheduling techniques to achieve the optimum results but after the extensive survey of various scheduling techniques based on genetic, Simulated Annealing (SA), ACO, PSO and hybrid reveals that a lot of dimensions are yet to be explored in terms of datacenter cost, virtual machine migration, energy consumption and Service-Level Agreement etc. Application: It discusses numerous meta-heuristic based task scheduling algorithms with their classification patterns so as to find the gap in the already proposed algorithm and suggest the untouched areas for the further research.

Keywords

Cloud Computing, Distributive Environment, Metaheuristics, NP Hard Problems, Task Scheduling.

Full Text

   

Lucky Saurabh ¹, P. S. Geethu ¹, Devesh Kumar ¹, Sunil Kumar ¹

Affiliations
1 Department of Electronics and Communication Engineering, ASET Amity University Uttar Pradesh, Noida - 201303, IN

Abstract

Objectives: To achieve application in the area of terahertz dual bow tie EBG based fractal antenna is used. Methods/ Statistical Analysis: The antenna is designed and analyzed at solution frequency 1.56 THz for frequency range of 1.1-1.8 THz. The feature of EBG-inspired structure is a magnetic conductor used along with ground plane to extent performance of the design. Results: The analysis is fetch at different THZ frequencies to analyze the results. The maximum gain of 3.06 dB and return loss of -16.14 dB are achieved at 1.56 THz and 1.75 THz respectively. Application/Improvements: HFSS simulation software is used for simulation of the design.

Keywords

Dual Bow Tie Patch Antenna, EBG, Tera Hertz (THZ)

Full Text