Subhranshu Sekhar Samal

Green technology in construction

This paper outlines the solutions for the energy efficient futuristic buildings. The implementation of latest technology in architecture and constructions will lead to better home with green standards. Buildings, accounting for 30–40 percent of global energy use, are known to be energy guzzlers. In India, buildings account for 30 percent of total energy consumption. The idea of green buildings promotes use of renewable energy, recyclable & recycled products, focus on efficient use of water, minimization of energy, improving occupational health and comfort. Green Buildings have few major areas which have potential to be tapped through appropriate usage in the design of the building by means of high thermal insulations. Rain harvesting, terrace gardening, extensive usage of CO2 sensors for better management of indoor air quality (IAQ), ventilation & Energy efficient EUROVENT & ARI certified air handling units which will lead to a perfect green building vision.

Green synthesis of silver nanoparticles using hypericin-rich shoot cultures of Hypericum hookerianum and evaluation of anti-bacterial activities

The paper reports a green chemistry approach for the synthesis of silver nanoparticles (AgNPs) using hypericin-rich shoot cultures of Hypericum hookerianum as reducing agent. Normal green shoot cultures deficient in hypericin and red-pigmented shoot cultures rich in hypericin (3.01% DW) were raised in Murashige and Skoog nutrient medium containing 1.0 mg/L kinetin (KIN) and 0.2 mg/L naphthaleneacetic acid (NAA), respectively. Dried powder extracts of whole shoots were used for AgNPs formation. The effect of temperature on the formation of AgNPs is investigated. The nanoparticles obtained were characterised using UV–Vis spectroscopy, field emission scanning electron microscopy (FESEM), energy-dispersive X-ray (EDX) and X-ray diffraction (XRD) analyses. The UV–Vis spectra of AgNPs gave surface plasmon resonance (SPR) at 440 nm. The synthesised AgNPs were effective against different multidrug-resistant human pathogens such as Bacillus subtillis (Gram positive) and Pseudomonas aeruginosa (Gram negative) species. Further, the effect of hypericin concentration on anti-bacterial activity was investigated and was found to increase with increase in concentration.

Futuristic humanoid robot of twenty first century

This paper represents the basics of robotics in the context of artificial intelligence and provides solution in future trend in robotics. It describes the very basics of robotics like sensors and actuators, gives an overview on robotic history and introduces some basic problems encountered in modern robotics. It describes possible solutions to those problems without going deeply into theory. The problems introduced are perception, basic pose description, transition and sensor models, localization as a special case of perception, representation of environment, path planning (cell decomposition, potential fields, skeletonization, and probabilistic roadmaps), movement of robots, and some real-life examples. The general problem of simulating intelligence has been broken down into a number of specific sub-problems like deduction, reasoning, problem solving, natural Knowledge processing, motion and manipulation, perception and social intelligence, cybernetics and brain simulation. These intelligences together provide better computational robotics named HUMANOID ROBOT. These will prove important in applications like surgical robots, robots for civil use and military robots. Human-robot interaction and robot understandings are the main topics covered to enhance our future trends of robotics through artificial intelligence.

Nanophase modification of concrete for Enhancement of microbial properties and durability: Present status and future scope

Concrete structures are widely used in civil engineering which a mixture of calcium oxides, hydroxides and carbonates with quartz minerals and water. It is alkaline in nature with pH range 11–13.Concrete normally used in construction has large variety in mix proportion as well as type of cementitious materials. The basic characteristics of concrete structures and materials can be altered by adding some nanomaterials to increase its mechanical properties and others parameters. Nanomaterials like Titanium oxide (TiO2) can oxidize oxygen or organic materials which is having sterilizing, deodorizing and anti-fouling properties. Additionally as TiO2 is exposed to UV light, it becomes increasingly hydrophilic, thus it can be used for self -cleaning properties. Self healing concrete could reduce the CO2 emission that result from concrete production and also may lengthen the life of the concrete. Addition of nanomaterials into different concrete structures could improve its performance. The various test methods can be performed to check the durability of concrete structures and also antimicrobial properties can be enhanced.

Selection of materials for the design and development of electromechanical rotary joints

Electromechanical rotary joints containing multiple mechanical & electrical components are widely used to transfer power and signal (voice, data & of late video too) information from one stationary electromechanical structure /member called Stator to another rotating member of same assembly called Rotor in large platforms like Naval ships, Combat Vehicles etc. The design challenges involved in such devices are plenty and one such new design for the futuristic application undertaken by our Project team faced a material selection challenge and same is described in this paper. Choice of materials for mechanical components/subassemblies besides the main housing structure is of technical importance. Fully assembled Rotary joint duly mounted and driven by suitable driving mechanism, needs to meet certain stringent mechanical, electrical and environmental specifications, particularly for defence applications. The main objective of the design was met from proper choice of materials, which are implementable through the process of castings, machining, fabrication of number of components and completing their assembly. The material selection process for various component designs is in full compliance with the technical requirements projected by the user. Design is done in such a way that it is cost effective and efficient.

Design and analysis of conveyor chain for automatic ammunition loading machine

An ammunition loading system will have four main parts namely Bin, Rounds, Conveyor and driving motor. In this paper we will explore the scope of new type of loading conveyor that will accommodate twenty four rounds. Conveyor will be designed, considering the space constraints inside the tank and should be suitable for automatic loading and unloading. Design will also support the high rate of rounds being fired reliably. These rounds will consist of four different types of projectiles. The conveyor will be designed using CAD modeling software and same will be analyzed to check and validate the design.