We demonstrate antisolvent vapor assisted diffusion as a unique technique for controlled nucleation and better crystallization of methylammonium lead iodide, perovskite absorber film for solar cell applications. Our observations also suggest that due to non-covalent weak interaction between the perovskite absorber and the high boiling point antisolvent, Ethylacetate (EA), a new microstructured morphology (micro-rods) evolves in the film, which we report for the first time. It is believed that the changed morphology of the mesoporous films for the high boiling point antisolvent, exhibits better fill factor and results in 32% enhancement of power conversion efficiency than the low boiling point antisolvent, Dichloromethane (DCM), diffused and as-deposited films, thereby suggesting one more parameter to achieve better device performance.

Keywords: Organic-inorganic hybrid perovskite, antisolvent, micro rods, power conversion efficiency (PCE).

The inclusion of attractive interaction potential generates the right decrease of rotational frequencies toward the experimental values. Thus, it may be inferred that the bands of interest are generated from the shears mechanism due to the attractive interaction potential, thereby, opens up a new and novel branch of the excitation mechanisms in weakly deformed nuclei.

Keywords: Shears mechanism, nuclear interaction, particle-hole excitations, cranking model

In this manuscript different important outcomes of the BCS theory have been revisited in a nutshell focusing on every mathematical details to explain superconducting properties.

Keywords: Superconductivity, BCS theory

This review paper highlights the use of water driven motor as an alternate energy source to conventional engines. Water run motors can be efficiently utilised in vehicle. It will solve the problem of energy crisis as well as the pollution problem. Brown’s gas is used to run such engine. The electrolysis procedure and hydrogen burning is the two main steps in the operation of such engines. Limitations of such engines are also discussed.

Keywords: Water fuel cell, Electrolysis, Hydrogen energy, Eco-friendly

The transient flow characteristics have significant applications in the engineering industry, especially in the domains of high energy fluid physics and compressible flow. The present research work provides an investigation of the laminar-to-turbulent transition fluid flow when air passes through successive contractions and expansions. The study has been performed through experimental runs in a fiberglass wind tunnel at different check points and then validated through simulation in the ANSYS workbench by keeping the input parameters constant. The simulation reveals the flow detachment due to turbulence and sudden increase in area. The research also plays a pivot roll to depicts that the velocity has been changing over the different sections of the flow conduit. The validation has resulted in an accuracy reach of almost 99% and has therefore, provided a lucid understanding of the velocity and pressure profiles of the flow through the conduit.

Keywords: Transient; Laminar; Turbulent;compressible flow, Flow Profiles; ANSYS

In this modern world, the paradigm of smart cities has gathered major popularity. Thanks to the evolution of microcontroller, the notion of smart city seems more convincing. This paper proposes an algorithm that helps users to find a free parking space for cars automatically. Microcontrollers and sensors have already made a huge impact on learning and predictive analysis. The widespread affirmation gave a new life to this open source hardware component which potentially became a big challenge to many industrial products and new interests in electronic system and prototyping. This paper deals with effective parking solution which involves the use of ultrasonic sensor, atmega series, wireless signal module, cloud server and decrease the time spent for searching parking spaces. IoT based new parking platform enable to connect, analyze and automate data gathered from devices and execute smart parking possible. The proposed system not only reduces manpower but also reduces traffic congestion, and facilitating secure parking system within a limited area.

Keywords: Microcontrollers, Smart Cities , IoT, Traffic-Congestion

In the twentieth century, quantum physics is one of the most successful approaches in scientific progress. To theorize the concept of quantum computing Max Planck's idea of the existence of energy in individual units like matter was used. Since then, the idea of manufacturing quantum computers for everyday use is becoming more plausible with technological advances in quantum theory. A classical computer carries out logical operations using a bit which is either 1 or 0. In contrast to a classical computer, a quantum computer works with a quantum bit or qubit, which is not limited to two states only. Qubits can exist in a superposition of the two states creating parallelism. Qubit represents the state of atoms, ions, photons or electrons. These qubits which work together with a control device act as a computer memory. Quantum computers have the potential to become million times more potent than present-day supercomputers due to the presence of these multiple states simultaneously. Concepts and ideas of quantum computing have been demonstrated by different methods like Ion Trap, Quantum Dot methods etc. However, the actual realization of such a superior system is still in the future. A strategy must be formulated to maintain decoherence and other potential sources of error at a permissible level. Astonishingly, quantum computing took a long time to take off, even though the physicists have known about the world of subatomic particles. Even so, it took computer scientists another half-century to consider harnessing quantum effects for computation. Also, it was later discovered that quantum computers could solve quantum mechanical many-body problems that are impractical to solve on a classical computer. The foundations of the subject of quantum computation may have become well-published, but the knowledge is still growing. Hence here is a research paper based on the study of quantum computation.

Keywords: Quantum Theory, Quantum Computing, Qubits, Parallelism, Ion Trap method, Quantum Dot Method.

Investigation of magnetic switching of nanoscale single MRAM cells of different shapes and sizes is imperative for their applications in future magnetic memory devices. To this end, we have investigated the magnetic switching mechanism of nanoscale single MRAM cells of two different shapes with varying lateral aspect ratios by computational micromagnetic simulation. We have analysed how various parameters such as the coercive field, remanence and saturation field were affected by the variation in magnetic field. We have also analysed the change in shape of the hysteresis loops of the various samples. The magnetization reversal states were simulated to justify the spatial coherence of magnetization switching. As a result, the cells with higher aspect ratio show the Py and Fe layers forming antiparallel states in the plateau similar to synthetic antiferromagnets. As we reduce the aspect ratio, more complex quasi-uniform magnetic states are observed which are even more complicated for elliptical cells. The rectangular cell with the highest aspect ratio of 2.5 shows the most coherent and predictable switching behaviour, showing its suitability for the application of MRAM cells.