تصفح حسب المؤلف "Ahmad, Zubair"
السجلات المعروضة 1 -- 20 من 47
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Covid-19 inspired a stem-based virtual learning model for middle schools—a case study of Qatar
( MDPI , 2021 , Article)An unprecedented turn in educational pedagogies due to the COVID-19 pandemic has significantly affected the students’ learning process worldwide. This article describes developing a STEM-based online course during the ... -
Design and optimization of four-terminal mechanically stacked and optically coupled silicon/perovskite tandem solar cells with over 28% efficiency
( Elsevier , 2023 , Article)Silicon/perovskite tandem devices are believed to be a favorite contender for improving cell performance over the theoretical maximum value of single-junction photovoltaic (PV) cells. The present study evaluates the design ... -
Development and validation of teacher artificial intelligence (AI) competence self-efficacy (TAICS) scale
( Springer Nature , 2024 , Article)Evaluating teacher AI competence levels and building effective, safe, and healthy learning environment are crucial steps in transitioning to AI-based education. Current established digital competence frameworks may indirectly ... -
Development of Semitransparent UV Photodetector Based on PTB7-Th:PCBM Composite Using the Cost-effective Fabrication Method
( ESG , 2021 , Article)This article presents a semitransparent ultraviolet (UV) sandwich-surface type sensor based on PTB7-Th: PCBM composite. The ultraviolet (UV) transparency of 29% was achieved through a cost-effective drop-cast fabrication ... -
A distinctive method of online interactive learning in stem education
( MDPI , 2021 , Article)A breakthrough that has occurred in recent years is the emergence of the COVID-19 pandemic. It has affected various sectors of society, including the educational sector. It has prevented students from performing group-oriented ... -
Effect of cold and hot compactions on corrosion behavior of p- and n-type bismuth telluride-based alloys developed through microwave sintering process
( Elsevier , 2023 , Article)Bismuth Telluride (BiTe) based p-type and n-type alloys exhibit superior thermoelectric (TE) performance covering energy requirements for specialized and home utilization. The main challenge nowadays is the sustainability ... -
Effect of illumination and applied potential on the electrochemical impedance spectra in triple cation (FA/MA/Cs) 3D and 2D/3D perovskite solar cells
( Elsevier , 2021 , Article)Even though there has been numerous works performed based on electrochemical impedance spectroscopy (EIS) of perovskite solar cells (PSCs), however, many aspects of the obtained EI spectra are yet to be fully grasped. ... -
Effective Pedagogical Approaches Used in High School Chemistry Education: A Systematic Review and Meta-Analysis
( American Chemical Society , 2022 , Article)This article systematically reviews the pedagogical approaches adopted in high school chemistry education with the aim of highlighting the most effective evidence-based instructional practices reported in the literature. ... -
Electrochemical impedance spectroscopy analysis of hole transporting material free mesoporous and planar perovskite solar cells
( MDPI , 2020 , Article Review)The future photovoltaic technologies based on perovskite materials are aimed to build low tech, truly economical, easily fabricated, broadly deployable, and trustworthy solar cells. Hole transport material (HTM) free ... -
Electrospun PVDF/ZnO Based Composite Fibers for Oil Absorption and Photocatalytic Degradation of Organic Dyes from Waste Water
( Springer , 2022 , Article)Clean drinking water has been a vital topic of research in modern world, this makes efficient water purification as the latest demand. The research and development in the field of filtration technology has revitalize ... -
Enhancement of photovoltaic module performance by thermal management using shape-stabilized PCM composites
( Elsevier , 2024 , Article)Thermal management of photovoltaic (PV) panels is crucial due to the deterioration of their electrical efficiency at elevated operating temperatures. Therefore, thermal protection of PV against overheating is highly required. ... -
Enriching computing identity frameworks: integrating current constructs and unveiling new dimensions for today’s tech-savvy world—a systematic review
( Frontiers Media S.A. , 2024 , Article)This systematic review seeks to improve the existing framework for developing students’ Computing Identity (CI) by integrating contemporary elements and identifying new dimensions. A meticulous selection of 31 articles ... -
Exploring Teachers’ Perceptions of the Barriers to Teaching STEM in High Schools in Qatar
( MDPI , 2022 , Article)Understanding teachers’ attitudes and perceptions of STEM teaching is a key pathway to enhance effective STEM teaching. Inarguably, teachers are the cornerstone of educational quality and play a central role in students’ ... -
Fabrication and Investigation of Graphite-Flake-Composite-Based Non-Invasive Flex Multi-Functional Force, Acceleration, and Thermal Sensor
( MDPI , 2023 , Article)This work examines the physics of a non-invasive multi-functional elastic thin-film graphite flake–isoprene sulfone composite sensor. The strain design and electrical characterization of the stretching force, acceleration, ... -
Fabrication of a nickel sulfide/nickel oxide heterostructure for efficient electrochemical oxidation of methanol
( Royal Society of Chemistry , 2023 , Article)As low-cost anode catalysts for the electrocatalytic oxidation of methanol, a nickel sulfide/nickel oxide (NiS/NiO) heterostructure deposited on Ni foam and its counterparts nickel sulfide (NiS) and nickel oxide (NiO) are ... -
Fuzzy-based approach using iot devices for smart home to assist blind people for navigation
( MDPI , 2020 , Article)The demand of devices for safe mobility of blind people is increasing with advancement in wireless communication. Artificial intelligent devices with multiple input and output methods are used for reliable data estimation ... -
Hierarchical BaTiO3/NiFe2O4 nanocomposite as an efficacious photoanode for photoelectrochemical water splitting
( Elsevier , 2022 , Article)Photocatalysis of water for the production of oxygen and hydrogen is one of the most important development in the drive for clean energy, and it has received a lot of attention because it is a green and easy step to generate ... -
High school students' STEM interests and career aspirations in Qatar: An exploratory study
( Elsevier , 2023 , Article)This study sought to explore high school students' interest in science, technology, engineering, and mathematics (STEM) related disciplines and careers in the context of Qatar. Quantitative data was collected using a survey ... -
Highly sensitive humidity sensor based on cadmium selenide quantum dots-polymer composites: synthesis, characterization, and effect of UV/ozone treatment
( Springer , 2023 , Article)This work describes the rational design of thin film-based cadmium selenide quantum dots (CdSe) mixed with conductive polyvinylidene fluoride (PVDF), inducing PVDF-CdSe composite for potential resistive humidity-sensing ... -
Ion-imprinted membranes for lithium recovery: A review
( Elsevier , 2024 , Article)This review critically examines the effectiveness of ion-imprinted membranes (IIMs) in selectively recovering lithium (Li) from challenging sources such as seawater and brine. These membranes feature customized binding ...
