Search
375 articles for “Resonator”
-
Dodecahedron Methane Hydrate Cage Structure – An Ab initio Study
Abstract: Comparative study of 512clathrate hydrate cage having different numbers of methane guest molecules encapsulation is carried out by calculating interaction energy, encapsulation energy and thermo-chemical stability parameters using density functional theory-based calculation with B3LYP functional and 6-31G(d) basis set. Nuclear magnetic resonance spectroscopy(NMR), Infrared spectroscopy (IR spectroscopy) and Raman spectroscopy of empty and methane encapsulated 512clathrate hydrate cages, change in Gibbs free energy and methane hydrate formation enthalpy are predicted …
Published in Journal of Petroleum Engineering & Technology · Vol. 2, Issue 1-3, 2012 · pp. 51–64 Read article
-
Theoretical Prediction of Maximum Number of Methane Molecule Accommodation in Unit Cages of S-I Clathrate Structure
Abstract: Density Functional Theory (DFT) based simulations have been performed to determine maximum possible number of methane molecule accommodation in unit cages of methane hydrate structure-I (S-I). Interaction energy, encapsulation energy and incremental encapsulation energy are calculated using B3LYP functional and 6-31+G(d) basis set. Nuclear magnetic resonance and Raman spectroscopy of one methane encapsulated are predicted at B3LYP/6-31G(d) level for 51262 hydrate cage. Maximum one methane molecule accommodation both in 512 …
Published in Journal of Petroleum Engineering & Technology · Vol. 2, Issue 1-3, 2012 · pp. 116–122 Read article
-
Experimental Study on Effectiveness of TMD in Reducing Torsional Motion under Harmonic Base Motion
Abstract: AbstractAsymmetry in the building could arise due to unsymmetrical distribution of mass, stiffness, damping and/or strength characteristics. The earthquake response of asymmetric buildings is characterized by coupling between translational and rotational degrees of freedom (dofs). This paper includes an experimental analysis of one storied asymmetrical building frame subjected to harmonic motion with and without tuned mass damper (TMD). Experimentation is done on a shake table and readings were recorded. The …
Published in Journal of Structural Engineering and Management · Vol. 4, Issue 3, 2017 · pp. 13–16 Read article
-
Silver Particles coating on polypropylene matrix for bacterial filter property
Abstract: Silver particles have a wide range of biomedical applications, including their use as drug. In this paper, we report on the synthesis of silver particles using crude aqueous extract of Manihot esculenta leaf extract. Two different (conventional stirring and ultrasonic) methods were employed in the reduction of AgNO3 process. Native extract as well Ag colloidal extract were checked cytotoxicity against Human Cervical Carcinoma cell. The anti cancer results achieved excellent …
Published in Journal of Thin Films, Coating Science Technology & Application · Vol. 7, Issue 3, 2020 · pp. 16–25 Read article
-
Effect of Annealling on Optical Band Gap of Fe2O3 Thin Films on Amorphos Transparent Glass Substrate by Spray Pyrolysis Method
Abstract: The Fe 2 O 3 thin film has widely used photo-electrochemical cells. In this paper, the optical properties like band gap of thin films is depend on annealed temperature at 100 o C and 200 o C was discussed. The optical property of Fe 2 O 3 are studied by UV- Vis spectroscopy .The optical band gap decreased after increasing annealing temperature. The refractive index of Fe 2 O 3 …
Published in Journal of Thin Films, Coating Science Technology & Application · Vol. 10, Issue 2, 2023 · pp. 25–29 Read article
-
Dual Band Rectenna for Energy Harvesting and Wireless Power Transfer
Abstract: In this paper, anticipated antenna for energy harvesting has been studied with high directivity, high gain and good return loss. The simulation of the proposed antenna was carried using IE3Dsoftware. The presented antenna is fit for wireless power transfer at resonant frequency 2.7 and 4.75 GHz. The microstrip antenna design is very compact which is made of glass epoxy having dielectric constant of 4.4.Keywords: Microstrip patch antenna, return lossCite this …
Published in Journal of Telecommunication, Switching Systems and Networks · Vol. 4, Issue 3, 2017 · pp. 1–4 Read article
-
Music On Mood (MARS Music Player)
Abstract: Today, In this time world is facing many challenges due to COVID-19, we are inborn social living-beings. Truth be told the human social mind is more evolved than some other species on earth. Simply messaging and calls were not enough to uplift mood. This is where music comes in, being an essential component or significant element in life. To connect in a way the social brain will resonate on an …
Published in Journal of Telecommunication, Switching Systems and Networks · Vol. 8, Issue 2, 2021 · pp. 27–31 Read article
-
High Gain Antenna Array (2x1 and 4x1) Design for WLAN Application
Abstract: Micro-strip antennas became very popular in 1970s primarily for space borne applications. Today they are used for government and commercial applications. These antennas consist of a metallic patch on a grounded substrate. The metallic patch can take many different configurations. However, the rectangular and circular patches are most popular because of ease of analysis and fabrication, and their attractive radiation characteristics, especially low cross-polarization radiation. In high performance aircraft, spacecraft, …
Published in Journal of VLSI Design Tools and Technology · Vol. 8, Issue 2, 2018 · pp. 1–8 Read article
-
Enhancement in RMPA Parameters using Slotted Rhombus Connected Square Shaped Antenna with Left Handed Metamaterial
Abstract: In this paper, rectangular microstrip patch antenna (RMPA) along with metamaterial which has design of “slotted rhombus connected with rectangular shaped cover structure” is proposed at height of 3.2 mm from the ground plane. The RMPA with proposed metamaterial structure is designed to resonate at 2.7 GHz frequency. This work is mainly focused on increasing the potential parameters of microstrip patch antenna. Proposed metamaterial design structure significantly reduces the return …
Published in Journal of VLSI Design Tools and Technology · Vol. 7, Issue 1, 2017 · pp. 49–54 Read article
-
Experimental Analysis of Rectangular and Circular Microstrip Patch Antenna with Superstrates
Abstract: This paper focusing on the experimental analysis of rectangular and circular microstrip patchantennas with and without radome (superstrate). The proposed antennas were designed at2.4GHz, using HFSS simulation software and fabricated on Arlon DiClad 880 substratewhose dielectric constant is 2.2, loss tangent is 0.0009 and thickness of the substrate is1.6mm. Placing different dielectric constant of the superstrates above the patch antennasperformance characteristics have been studied of both antennas on the basis …
Published in Recent Trends in Electronics Communication Systems · Vol. 7, Issue 3, 2020 · pp. 34–45 Read article
-
Stable control of the motion of gas bubbles dissolved in a vibrating fluid in microgravity conditions
Abstract: Previous theoretical and experimental studies of the effect of vibration on gas bubbles, dissolved in a fluid, permitted to establish the localization and stable position of a “swarm” of gas bubbles at a certain level of fluid in the vessel corresponding to a certain frequency and vibration acceleration, aswell as to the volume of a swarm of gas bubbles. The control of a “swarm“ of gas bubbles in a fluid …
Published in Recent Trends in Fluid Mechanics · Vol. 8, Issue 1, 2021 · pp. 34–44 Read article
-
Mechanism of Intensive Gas and Fluid Mixture in the Process of Vibroturbulization and Its Technological Applications
Abstract: Previously conducted experimental studies have established that in a certain narrow frequency range and upon reaching a certain value of the amplitude of water oscillations in a sealed vessel with above-water air shell, subjected to vertical vibration, a resonant phenomenon occurs, called “vibroturbulization”, leading to intensive mixing of media of different density. The studies carried out were purely experimental in nature and could not reveal the physicochemical mechanism of occurrence, …
Published in Recent Trends in Fluid Mechanics · Vol. 9, Issue 2, 2022 · pp. 21–34 Read article
-
Study of Generation of Waveform of Output Voltage for Voltage and Power Maximization in VEH Device
Abstract: AbstractVibration energy harvester is good source for sensors; and power conversion efficiency of electromagnetic devices is very low. Size of the device is one of the limitations for maximum voltage and power generated. This paper discusses various ways and combinations for voltage maximization. Maximum voltage is generated at resonance, also initial position of magnet at rest plays important role in voltage generated. Value of maximum voltage generated does not always …
Published in Recent Trends in Sensor Research & Technology · Vol. 4, Issue 1, 2017 · pp. 1–6 Read article
-
Wearable Rectenna Array for Wireless Power Transmission
Abstract: This paper explains about design of wearable antenna array which is used for receiving the microwave power transmitted at dual frequencies. Direct current power is obtained at the end of rectifying antenna or (Rectenna) composed with filter and Schottky diode. Proposed wearable antenna is designed on jeans textile as a substrate and copper foil tap as conducting material. The antenna array has the dual band resonating frequencies which are 4.65 …
Published in Trends in Electrical Engineering · Vol. 8, Issue 1, 2018 · pp. 59–64 Read article
-
Analysis of LC Oscillation Presence and Its Impacts in 765 kv Line Connected With Non-Switchable Shunt Reactor
Abstract: AbstractThe transmission lines are one of the most important parts of the power system. The number of line faults in transmission line is more compared with the total number of faults in the whole power system. Distance protection is commonly used in long transmission lines. It works on the basis of increase or decreases in predetermined value of circuit admittance, impedance, or reactance. Shunt reactors are connected in high voltage …
Published in Trends in Opto-electro & Optical Communication · Vol. 6, Issue 1, 2016 · pp. 20–24 Read article
-
Effects of Variation of Differential Gain and Injection Current on the Performance Characteristics of the Designed 405 nm MQW Violet Laser
Abstract: AbstractIn this work the Designing and Performance Analysis of a 405 nm InGaN based multi quantum well (MQW) Violet Laser have been presented. The internal designing of 405nm Violet Laser has been done with appropriate calculation. The desired wavelength of 405nm was obtained by adjusting the exact concentration of In0.0979Ga0.9021N / Al0.07Ga0.93N. The effects on Rate Equations by varying the differential gain and Injection current have been observed. Also the …
Published in Trends in Opto-electro & Optical Communication · Vol. 4, Issue 1, 2014 · pp. 13–22 Read article
-
Performance Enhancement of Laser based Modern Railway Mobile Platform Crossing System
Abstract: AbstractIn this work, the modern railway mobile platform crossing system is improved through the proper computation of GaInP based 635 nm multiple quantum well red laser maintaining the perfect peak intensity of the power which is achieved at 635 nm. By analyzing the performance of the designed Ga0.5In0.5P/ (Al0.5Ga0.5)0.5In0.5P edge emitting laser the peak material gain is obtained. Sustaining threshold current of 6.7 mA, a maximum resonance frequency of 10 …
Published in Trends in Opto-electro & Optical Communication · Vol. 4, Issue 1, 2014 · pp. 23–28 Read article
-
High Modulation Performance of a Designed InGaN Based 405 nm Multi-Quantum Well Violet Laser
Abstract: AbstractIn this work, the modulation performance characteristics of a designed 405 nm InGaN based multi-quantum well (MQW) Violet Laser are optimized and presented by varying injection current and differential gain. A maximum output power of 222.53 mW and a maximum resonance frequency of 18.79 GHz of the laser are obtained for 117 mA injection current, where, the differential gain is 4x10-16cm2. The differential quantum efficiency of the laser is obtained …
Published in Trends in Opto-electro & Optical Communication · Vol. 3, Issue 2, 2013 · pp. 7–13 Read article
-
A Comparison Study of Different Classification Algorithm on Brain Tumor Segmentation
Abstract: A brain tumor is a tissue mass caused by aberrant cell proliferation in the brain. It is a collection of tissues that causes hormonal alterations and eventually death. In order to save human lives, brain tumors prognosis and prevention is a difficult task. The use of modern medical image processing approaches has made the identification of brain tumors more flexible in recent years. Due to the absence of ionizing radiations, …
Published in Trends in Opto-electro & Optical Communication · Vol. 11, Issue 3, 2021 · pp. 1–7 Read article
-
Non-linear Photonic Crystals and their Applications: A Review
Abstract: The nonlinear photonic crystals (NLPCs) are periodic material structures in which nonlinear materials are used for photonic structure formation. In nonlinear photonic crystals, the optical response mainly depends on the intensity of the light beam that propagates through the photonic crystal. These structures show new optical properties with improved or enhanced or new functionalities that cannot be observed in linear photonic crystals. In addition to this, using nonlinear materials in …
Published in Trends in Opto-electro & Optical Communication · Vol. 12, Issue 2, 2022 · pp. 36–39 Read article