Muhammad Sana Ullah Sahar

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Muhammad Sana Ullah verified their affiliation via an institutional email.

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• PhD Mechanical Engineering
• Assistant Professor at University of Sargodha

This study investigates the modulation of various characteristics of BaCeO3 under hydrostatic stress using the ultrasoft pseudopotential method and the generalized gradient approximation approach. The structural, electronic, mechanical, optical, and thermodynamic properties were computed, alongside spectroscopic and structural characterization. The...

The industrial usage of Carbon fiber reinforced polymers (CFRP) has increased significantly over the past few years due to its distinguished characteristics like great strength-to-weight ratio, fatigue resistance, superior damage tolerance, excellent corrosion resistance, etc Machining of CFRP differs from traditional machining due to its structure...

Purpose The study highlights our findings, including the confirmation of phase stability through XRD analysis, the characterization of optical properties revealing high absorption and conductivity and the analysis of mechanical stability through elastic constants. Additionally, we present detailed results on the band gap, EELS analysis and the suit...

Perovskites, specifically CsPbX3 (X= F, Cl, Br, I), are gaining attention for their remarkable optoelectronic features, suitable for applications like solar cells, LEDs, and photodetectors. Utilizing Density Functional Theory (DFT), this study explores CsPbX3's electronic, mechanical, and optical properties. CsPbI3 and CsPbBr3 exhibit ideal electro...

This study uses the ultrasoft pseudopotential (USP) and generalized gradient approximation (GGA) to investigate modulation in the various features in Thorium Beryllium Oxide ThBeO3 under static stress in a comprehensive manner. Although there is a notable drop of 25% in lattice volume and a 9% fall in lattice parameters, the crystal lattice is stil...

The demand for increasingly fine detail in optical lithography for semiconductors necessitates the use of lower-wavelength lithographic light. This drives the need for lenses in optical lithography steppers made of vacuum ultraviolet-transparent (VUV-transparent) materials. In this work, the density functional theory (DFT) study of potassium magnes...

Cubic perovskite titanium stannous oxide (TiSnO3) is a promising material for various applications due to its functional properties. However, understanding how these properties change under external stress is crucial for its development and optimization. This study employed density functional theory calculations to investigate the structural, elect...

Oxide perovskites (ABO3) have fascinated researchers due to their potential applications in diverse fields because of their flexible chemistry and favourable characteristics including tunable band gap, high carrier mobility, and excellent optical properties. Here, a DFT-based study was conducted on RbTaO3, delved into the material behaviour under v...

This research investigates the electronic, optical, elastic, and mechanical characteristics of cubic Cesium Lead Iodide CsPbI 3 perovskite by utilizing the Generalized Gradient Approximation method under varying stress conditions ranging from 0 to 13[Formula: see text]GPa. Using the Density Functional Theory, the research demonstrates that electron...

The electronic, optical, structural, elastic, and mechanical properties of cubic Strontium Hafnium Oxide SrHfO3 under variable stress conditions were examined using the Generalized Gradient Approximation (GGA) method. Density functional theory was employed to determine the influence of stress on the electronic properties of the oxide perovskite, re...

Competition between concentrated solar power and solar photovoltaic has been the subject of frequent debate in recent years based on their cost of fabrication, efficiency, storage, levelized cost of energy, reliability, and complexity of respective technologies. Taking Pakistan as a testbed, a study was conducted to determine which technology is ec...

The primary purpose of this study is to perform a wide-ranging analysis of the electronic, optical, structural, elastic, and mechanical properties of cubic-structured potassium tantalum oxide (KTaO3) by applying different amounts of stress (0, 20, 40, and 60 GPa). The computational generalized gradient approximation technique is applied on cubic KT...

The computational Generalized Gradient Approximations (GGA) are applied on cubic Cesium Lead Bromide (CsPbBr3) with different stress values of 0, 5, 10, and 15 GPa for a supercell with PBE exchange relationship parameters to study the structural, mechanical, and optoelectronic characteristics. This study aims to determine how pressure affects struc...

The computational Generalized Gradient Approximations (GGA) are applied on cubic Cesium Lead Bromide (CsPbBr3) with different stress values of 0, 5, 10, and 15 GPa for a supercell with PBE exchange relationship parameters to study the structural, mechanical, and optoelectronic characteristics. This study aims to determine how pressure affects struc...

Commitment to net-zero emissions and limiting the rise in global temperature to 1.5°C could be achieved by the use of nontoxic materials in photovoltaics applications. Tin sulfide (SnS) is a potential nontoxic material. In the present work, SnS thin films were prepared for light-absorbing layer applications. SnS thin films were deposited on glass s...

This paper discusses the effect of elbows in the downstream region of pipe and pumps inlet flow conditions according to standards. Cavitation is a significant occurrence in such types of flow regimes that causes erosion and ultimately affects the pump's performance. Cavitation is also investigated using computational analysis using ANSYS Fluent. It...

Axons respond well to mechanical stimuli and can be stretched mechanically to increase their growth rate. Although stretch growth of axons and their transient lengthening ex-vivo has been discussed in literature extensively, however, real applications of this phenomenon are scarcely found. This work presents a technique to translate ex-vivo axonal...

Cavitation in ball valve was numerically investigated using Computational Fluid Dynamics (CFD) modeling and then validated against results gained through experiments. The experiment was carried out in an assembly unit of the automotive industry to analyze flow patterns. The effect of bubbles on other thermophysical properties of the fluid was also...

Background: Various modalities to facilitate nerve regeneration have been described in the literature with limited success. We hypothesized that negative pressure applied to a sectioned peripheral nerve would enhance nerve regeneration by promoting angiogenesis and axonal lengthening. Methods: Wistar rats’ sciatic nerves were cut (creating ~7 mm ne...

Nerve prostheses are widely utilized to reconstruct segmental (gap) defects in peripheral nerves as an alternative to nerve grafting. However, with increasing gap length, the effectiveness of a nerve prosthesis becomes sub-optimal, which subsequently has made repairing larger gaps in peripheral nerves a significant challenge in the field of regener...

The potential of peripheral nerves to regenerate under the effect of axial tensile forces was not previously extensively explored due to the lack of capabilities of translating ex vivo axonal stretch-growth to in vivo studies, until the development of a nerve stretcher. The nerve stretcher, which we have designed and manufactured recently, is a dev...

Axons in vitro respond to mechanical stimulus and can be stretched mechanically to increase their rate of growth. This type of accelerated growth under the influence of tensile forces alone appears independent of chemical cues and growth cones. The stretch-growth of axonal tracts ex vivo and their transient lengthening have been discussed in litera...

Peripheral nerve injuries are relatively common and can be caused by a variety of traumatic events such as motor vehicle accidents. They can lead to long-term disability, pain, and financial burden, and contribute to poor quality of life. In this review, we systematically analyze the contemporary literature on peripheral nerve gap management using...

The demand for sustainable micro-manufacturing technologies is growing with their increasing application in micro and nanoelectromechanical systems. The micro-manufacturing techniques utilizing physical or chemical energy have adverse effect on environment. Utilization of biological energy could be a benign alternative approach. In the exhaustive l...

This paper presents the development of a digital maskless lithography process and its capabilities for micro-feature fabrication using biomachining as a metal removal process. The maskless lithography system was developed using a DLP projector and is used to fabricate arrays of micro-sized geometric features. Square shapes were produced in dimple a...

Most machines lose a lot of energy due to friction. Wear due to friction also reduces performance. Therefore, it is important to reduce friction on the surface to improve energy efficiency and decrease wear. Surface texturing refers to making patterns on the surface for reducing friction. There are many surface texturing methods, such as using lase...

Surface texturing is a process of generating patterns on the surface of a workpiece to provide functionality or for aesthetic reasons. Grinding is one of the cheapest yet indispensable method used for surface texturing. In texturing by grinding process, the grinding wheel needs to have a particular shapes or patterns such as helical grooves on its...

The remanufacturing of machine tools is a complex approach to regain the original identity, accuracy, and precision of faulty machine tools in order to save time, money, and natural resources. Despite its great importance, the process is not yet fully standardized, and every industry has its own policy to remanufacture their machine tools. This may...

In surface grinding, machining parameters have a sound effect in determining surface geometry. Surface grinding by using patterned grinding wheel is of great interest now a days to produce effective regular textures on the surface of parts. These regular textures are of great importance as they enhance some tribological properties of the surface. I...

Micro-manufacturing is one of the growing technologies of near future. Non-traditional machining processes have been found to be beneficial for micro manufacturing using low density of energy for metal removal. To overcome environment related problems of chemical machining, biomachining has been developed over several years by making use of the met...

The result of digitization is a set of multiple scans showing different views of part’s surface. It is almost impossible to get the scan of whole part in one session without changing the orientation of the part. So the feasible solution is to divide the part in different regions and then digitized each region separately. Although various techniques...