piyush kuchhal - Academia.edu (original) (raw)

Papers by piyush kuchhal

Physics and Chemistry of Liquids, 2011

In the present article, a relation is being developed to study the pressure dependence of sound v... more In the present article, a relation is being developed to study the pressure dependence of sound velocity of water at different temperature. The computed results are found out to be in excellent agreement with the experimental data. However, it is shown that the sound velocity of water exhibits anomalous behaviour in the temperature range of 273.98–289.01 K.

2017 International Conference on Inventive Computing and Informatics (ICICI), 2017

A CPW-Fed microstrip patch antenna of size 21×22×1.6 mm3 along with its three variants is propose... more A CPW-Fed microstrip patch antenna of size 21×22×1.6 mm3 along with its three variants is proposed in this paper. Two slots are introduced on the patch of the base antenna to study the antenna parameters, in terms of bandwidth, gain and directivity for analysis. The proposed antennas are suitable for wireless wideband applications roughly between frequency ranges of 4 GHz to 14 GHz approximately. All three antennas are showing good return losses, high bandwidth of approximately about 10 GHz, peak gain and directivity of approximately 4 dB. The microstrip antenna structures are configured on FR4 epoxy substrate. The configurations are simulated and analyzed using Ansys HFSS software. This study would be helpful in the designing of compact microstrip antennas with enhanced bandwidth for various purposes in the field of wireless communications in general and various earth science applications in particular at super high microwave frequency.

Corrosion is a key concern for metal industries. Metallic oxidation due to the environment result... more Corrosion is a key concern for metal industries. Metallic oxidation due to the environment results in a major loss of metal over a span of time. Therefore, a protective coating such as hydrophobic coating is highly desired to avoid moisture in order to provide longevity of the metal. Superhydrophobic surfaces can be produced by controlling the surface roughness of numerous materials and their surface chemistry. In this study, a facile, eco-friendly and low cost sol-gel method for producing superhydrophobic coating on aluminium metal substrates has been reported. The aluminium metal surface was initially roughened using abrasive paper of appropriate grade. Then etching of metal surface was performed using a mixture of de-ionized water, HCl and Acetic Acid respectively in the ratio 20:8:1. The etching time was varied to control the surface roughness of the substrate. Subsequently polystyrene/SiO2 superhydrophobic coating on aluminium metal substrate was produced. The contact angle was...

EAI Endorsed Trans. Energy Web, 2021

Futuristic communication in sub 6-GHz demands a compact antenna with multi-band resonance. This w... more Futuristic communication in sub 6-GHz demands a compact antenna with multi-band resonance. This would be necessary to cater to the need in LTE, Wireless Fidelity, and 5G applications. A compact microstrip inverted slotted antenna for the future sub 6 -GHz wireless and mobile applications employs an important role in the present scenario. In this investigation, a slotted antenna especially for multi-band mobile applications in sub 6-GHz is presented. The slotted rectangular patch is matched with a microstrip offset feed line and stub matching. The performance of the single-layer slotted antenna is significantly improved using a slotted SRR structure. The designed antenna shows good reflections co-efficient at 3 GHz and 4 GHz with good return loss. The antenna exhibits impedance bandwidth up to 200 MHz and peak gain up to 4 dBi. It finds its application at the precise frequency for mobile wireless communication in LTE and sub 6-GHz for future 5G applications.

The polymer electrolytes with various compositions of Polyacrylonitrile/N-N Dimethylformamide (DM... more The polymer electrolytes with various compositions of Polyacrylonitrile/N-N Dimethylformamide (DMF)/Lithiumtetrafluoroborate (LiBF4) are synthesized by solution casting technique. The free standing, clear and transparent 60-80 micron thick films are formed. The promising structural and complexation changes in polymer electrolytes have been explored by X-ray diffraction (XRD) and Fourier transform infra-red (FTIR) techniques. The thermal properties of all solid polymer electrolytes (SPE) were studied by Thermo gravimetric Analyzer (TGA) and Differential Thermal Analyzer (DTA). The electrical properties, i.e., ionic conductivity of solid polymer electrolytes has been measured as a function of temperature and composition. A Polymer membrane for 3 wt. % of salt has a conductivity of 3.06x10 mScm at room temperature and 1.53x10 mScm at 358K. The conductivity values increased with increase in temperature and offered an ionic conductivity of the order of 10 mScm at temperatures 358K. Activ...

Sesbania cannabina (Retz.) Pers. (Dhaincha) is a member of family Fabaceae spread over several co... more Sesbania cannabina (Retz.) Pers. (Dhaincha) is a member of family Fabaceae spread over several countries in tropical and subtropical regions of the world. Sesbania aculeata, Sesbania drummondii, Sesbania grandiflora, Sesbania rostrata, Sesbania sesban, and Sesbania speciosa are other members of this family. The agricultural, nutritional and pharmaceutical applications of Sesbania species are known to farmers, villagers, and the tribes since ages and are well studied by researchers. However, the significance of Sesbania as an industrial crop has not been recognized till now. The objective of this study was extraction and characterization of Sesbania cannabina seed oil (SCSO) for potential engineering applications. The seed oil was extracted with hexane in a Soxhlet extractor. Yield was only 2.32% w/w due to long storage at high temperature in seed house. Sesbania cannabina seed oil methyl ester (SCSOME) was prepared via esterification and transesterification for analysis of fatty aci...

In this paper DSSCs of various electrode thicknesses (L = 3 μm→12 μm) are assembled using N719 dy... more In this paper DSSCs of various electrode thicknesses (L = 3 μm→12 μm) are assembled using N719 dye, an iodide (I")/triiodide (I#) redox liquid electrolyte and TiO2 (P-25) working electrode (WE). The theoretically modeled equations defining various bulk and interface impedances are incorporated with EIS spectrum analyzer software to fit the simulated EIS curves with experimentally measured EIS curves to evaluate the charger transfer and recombination properties of the assembled DSSCs. EIS fitting parameters investigated to study the impact of WE thickness on the charge transport properties of assembled DSSC. It is observed that the charger transfer resistance at TiO2/electrolyte interface (Rk) and series resistance (Rs) are reduced from 8 Ωcm2 → 4.05 Ωcm2 and 14.5 Ωcm2→10.06 Ωcm2 respectively which shows consistency with improvement in electron life time (τe) from 5.8 ms →12.4 ms for increasing WE thickness, L = 3 μm→12 μm. The combined impact of significant reduction in Rk and ...

A comparative investigation involving experimental and modelling-simulation is carried out to max... more A comparative investigation involving experimental and modelling-simulation is carried out to maximize the photovoltaic conversion efficiency (η) of a DSSC device assembled using N719 dye, an iodide redox liquid electrolyte and TiO 2 electrode. The measured current density-voltage (J-V) characteristics under 1 sun condition of a pre-assembled DSSC is simulated in a tiberCAD based microscopic model (TCMM) along with single-diode based macroscopic model (SDMM). The calibrated model parameters are then utilized for predicting a maximum η of a DSSC belonging to an unknown electrode’s thickness (L). The microscopic simulations provided a good qualitative nature of J V characteristics curves for different L and η values. A complete and best J-V curve fitting is achieved using a TCMM by incorporating an unaccounted series resistance of a FTO substrate. Particularly, model simulated J-V characteristics matches perfectly well to experimental results of a post-assembled DSSC device (η~5.46 %;...

This paper demonstrates the speed tracking for a separately excited non-linear DC motor using opt... more This paper demonstrates the speed tracking for a separately excited non-linear DC motor using optimized fuzzy logic controller. Rotor speed is varied by changing the armature voltage of the motor while keeping the voltage in the constant torque region. Genetic algorithms optimization-based fuzzy logic control is used to track the speed change, and the results obtained from fuzzy logic control are compared with PID controller. Comparison indicate an improvement in performance for optimized fuzzy logic control exhibiting a reduction in overshoot, transient, and steady-state parameters as compared with PID controller.

Sensors

Currently, two-wheelers are the most popular mode of transportation, driven by the majority the p... more Currently, two-wheelers are the most popular mode of transportation, driven by the majority the people. Research by the World Health Organization (WHO) identifies that most two-wheeler deaths are caused due to not wearing a helmet. However, the advancement in sensors and wireless communication technology empowers one to monitor physical things such as helmets through wireless technology. Motivated by these aspects, this article proposes a wireless personal network and an Internet of Things assisted system for automating the ignition of two-wheelers with authorization and authentication through the helmet. The authentication and authorization are realized with the assistance of a helmet node and a two-wheeler node based on 2.4 GHz RF communication. The helmet node is embedded with three flex sensors utilized to experiment with different age groups and under different temperature conditions. The statistical data collected during the experiment are utilized to identify the appropriate ...

EAI Endorsed Transactions on Energy Web

In this paper, an experimental study is carried out in order to compute the impacts of shading ef... more In this paper, an experimental study is carried out in order to compute the impacts of shading effect on photovoltaic (PV) system performance. Four numbers of 20W solar PV modules are considered and arrange in the 2x2 size of array for extensive analysis. Moreover, a performance comparison is carried out for all the four PV modules organized in seriesparallel (SP), Total cross-tied (TCT) and Latin Square puzzle based Latin Square-Total cross-tied (LS-TCT) electrical connections. In addition of this, three types of shadow test cases are taken to show the impact on behaviour of currentvoltage (I-V) and power-voltage (P-V) curves. Furthermore, the output power from PV array reduces as well as P-V curves exhibit multiple power maxima points such as local and global maximum power point (GMPP) due to shadow effect. The performance index parameters such as power at GMPP, minimum power losses, fill factor (FF) and efficiency are analysed experimentally under the distinguish shadow cases.

International Conference on Intelligent Systems, Control and Manufacturing Technology (ICICMT’2015) March 16-17, 2015 Abu Dhabi (UAE), Mar 16, 2015

In a Wireless Communication System, a Signal (Signal includes series of symbols) can travel from ... more In a Wireless Communication System, a Signal (Signal includes series of symbols) can travel from the transmitter to receiver over multiple paths. This phenomenon is referred to as Multipath Propagation, where signal attenuation varies on different paths. The propagation over different paths is caused by scattering, reflection, diffraction and refraction of the radio waves by stationary and moving objects, as well as the medium. The Delay spread can cause Inter Symbol Interference (ISI) when adjacent data symbols overlap and interfere with each other due to different delays on different propagation paths. For high data rate applications (especially in 4G & 5G Technologies) with very short symbol duration, the effect of ISI and the receiver complexity can increase significantly. When attempting to decode the signal, only part of a symbol for a signal path may be captured in a Fast Fourier Transform (FFT) window due to multiple path delays. In this paper, a Time Tracking Loop is proposed for OFDM based broadcast systems. The proposed time tracking topology is a fast digital feedback loop which corrects the timing errors for OFDM based broadcast based systems, such as DVB-H and DVB-T, efficiently. The loop is implemented with VHDL code targeting the Xilinx EP3C25Q240C8N FPGA Chip and it gives effective signal to error ratio 35dB.

International Journal of Engineering & Technology, Mar 19, 2018

This paper presents design and analysis of a rectangular planar microstrip antenna for high bandw... more This paper presents design and analysis of a rectangular planar microstrip antenna for high bandwidth. The proposed antenna is rectangular in shape with a rectangular slot on the center of patch. The antenna is designed and fabricated with FR4 epoxy substrate. The simulated and experimental results are giving a wide bandwidth of in excess of 4.5 GHz. The measured result also validate the simulate design. A simple analysis is also carried out and impedance is calculated.

Nanotechnology Perceptions

Facile one-pot hydrothermal synthesis of nanorice-like TiO 2 for an efficient dye-sensitized sola... more Facile one-pot hydrothermal synthesis of nanorice-like TiO 2 for an efficient dye-sensitized solar cell (DSSC) ABSTRACT. Highly crystalline TiO 2 powder consisting of morphologically rice-like nanoparticles is synthesized by a simple hydrothermal process using a premixture of titanium isopropoxide, ethanol and aqueous ammonia. An efficient mechanism decoupling hydrolysis and condensation promotes the formation of a rice-like morphology. As the average particle size and BET properties of nanorice-like TiO 2 were found to be quite similar to a commercially available TiO 2 (Degussa P25), their photoelectric properties were compared as a DSSC electrode. Under 1 sun irradiation the photovoltaic efficiency of nanorice-like TiO 2 was measured to be c. 20% higher in contrast to the mediocre efficiency (~5.45%) of P25. We suggest that together with a generally exploited reference, such nanorice-like TiO 2 could also be adopted as a model material for various applications.

Journal of Physics and Chemistry of Solids, 2021

The selection of a material of a particular application in spintronics requires that criteria of ... more The selection of a material of a particular application in spintronics requires that criteria of half-metallic should be fulfilled. The stability with adequate cohesive energy of the systems plays an important role. Apart from stability, magnetic moment must be adequate to store the information along with the appropriate presence of conducting channels at Fermi energy to conduct. Recently we have established a bridge between the results obtained by density functional theory (DFT) with those from mean field theory in the case of monatomic chains of 3-d series of periodic table. We have found that in the systems with less than half filled band, the up spin channel contributes for conduction and in case of more than half filled band the down spin channel contributes in conduction, while other channel is responsible for maintaining the magnetic state. It has been observed that both the conditions of stabilized magnetic state and conduction are required for a good spintronic material. Th...

Network on chip (NOC) architecture is an approach to develop large and complex systems on a singl... more Network on chip (NOC) architecture is an approach to develop large and complex systems on a single chip. In this work 3D mesh topological structures has been implemented with enhanced TACIT Security in HDL environment. The architecture supports physical and architectural level design integration. Basic communication mechanism between resources is envisioned to be packet switched message passing through the switches. For the node identification in 3D networks 8 × 8 × 8 Mesh configuration is taken. A new Algorithm is proposed for secured data transmission among nodes. TACIT algorithm is used for data encryption and decryption and applicable for n bit block size and key. Design is implemented in Xilinx 14.2 VHDL software, and functional simulation was carried out in Modelsim 10.1 b, student edition. Hardware parameters such as size cost and timings are extracted from the design code.

International Journal of Applied Engineering Research

Particulate Science and Technology

World Journal of Engineering

International Journal of Engineering & Technology

This paper presents design a High Gain Small Size Microstrip Patch Antenna for X-Band application... more This paper presents design a High Gain Small Size Microstrip Patch Antenna for X-Band applications such as Moving target RADAR sensor, Motion detector, Microwave camera, Ground Penetration RADAR sensors, wall penetration scanners and many medical applications. Now we have to selected circular geometry of micro strip patch antenna because circular geometry overcomes edge effect of antenna. The proposed antenna is designed to operate for X-band at the centre frequency of 10 GHz. The proposed Circular patch antenna is compact and easy to body mount with a high efficiency. The compactness makes it a better choice as compare with other antenna in the X-band. The proposed antenna shows a very sharp return loss of -46 dB at 10 GHz having narrow pattern with a good gain of 4.7 dBi. This enables its use in high directional applications. The paper represents the designing steps, and the simulation result obtained. The software used here for this circular shaped microstrip antenna is IE3D. Var...