Browsing Research of Qatar University Young Scientists Center by Author "Bhadra, Jolly"
Now showing items 1-20 of 25
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Comparative Study on Gas-Sensing Properties of 2D (MoS2, WS2)/PANI Nanocomposites-Based Sensor
Parangusan, Hemalatha; Bhadra, Jolly; Al-Qudah, Razen Amer; Elhadrami, Elhassen Cheikh; Al-Thani, Noora Jabor ( MDPI , 2022 , Article)NH3 is a highly harmful gas; when inhaled at levels that are too high for comfort, it is very dangerous to human health. One of the challenging tasks in research is developing ammonia sensors that operate at room temperature. ... -
Covid-19 inspired a stem-based virtual learning model for middle schools—a case study of Qatar
Abouhashem, Azza; Abdou, Rana Magdy; Bhadra, Jolly; Siby, Nitha; Ahmad, Zubair; Al-Thani, Noora Jabor... more authors ... less authors ( 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
Ehsan, Raza; Ahmad, Zubair; Aziz, Fakhra; Asif, Muhammad; Mehmood, Muhammad Qasim; Bhadra, Jolly; Al-Thani, Noora J.... more authors ... less authors ( 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 ... -
Detection of voltage pulse width effect on charge accumulation in PSCs using EFISHG measurement
Zubair, Ahmad; Taguchi, D.; Paek, Sanghyun; Mishra, Arti; Bhadra, Jolly; Iwamoto, M.; Manaka, T.; Nazeeruddin, Mohammad Khaja... more authors ... less authors ( Elsevier , 2020 , Article)We report the effect of applied pulse width on charge accumulation in triple cation perovskite solar cells (PSCs) during the Electric Field Induced Second Harmonic Generation (EFISHG) measurements. The PSCs were prepared ... -
A distinctive method of online interactive learning in stem education
Abouhashem, Azza; Abdou, Rana Magdy; Bhadra, Jolly; Santhosh, Malavika; Ahmad, Zubair; Al-Thani, Noora Jabor... more authors ... less authors ( 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
Lemine, Aicha S.,; Fayyaz, Osama; Shakoor, R.A.; Ahmad, Zubair; Bhadra, Jolly; Al-Thani, Noora J.... more authors ... less authors ( 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 the temperature on the passivity of the modified martensitic stainless steels
Radwan, A. Bahgat; Moussa, A. M.; Al-Qahtani, Noora H.; Case, Raymundo; Castaneda, Homero; Abdullah, Aboubakr M.; El-Haddad, Muhsen A.M.; Bhadra, Jolly; Al-Thani, Noora; Ding, Yuan... more authors ... less authors ( Taylor and Francis Group , 2022 , Article)The limits and nature of the passive behavior exhibited by modified martensitic stainless steels (MMSS) is studied in brine solutions at different temperatures using electrochemical methods and the point defect model (PDM), ... -
Electrospun PVDF/ZnO Based Composite Fibers for Oil Absorption and Photocatalytic Degradation of Organic Dyes from Waste Water
Parangusan, Hemalatha; Bhadra, Jolly; Ahmad, Zubair; Al-Maadeed, Ali S.M.A.; Al-Mohannadi, Abdulaziz M.A.A.; Al-Thani, Noora... more authors ... less authors ( 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 ... -
Hierarchical BaTiO3/NiFe2O4 nanocomposite as an efficacious photoanode for photoelectrochemical water splitting
Parangusan, Hemalatha; Bhadra, Jolly; Ahmad, Zubair; Karuppasamy, K.; Mallick, Shoaib; Touati, Farid; Al-Thani, Noora... more authors ... less authors ( 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
Abdellatif, Sellami; Santhosh, Malavika; Bhadra, Jolly; Ahmad, Zubair ( 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 ... -
High School Students’ Perceptions of the Role of Social Support in Cultivating Their Interests in and Aspirations to STEM Degrees and Careers—A Middle Eastern Case Study
Sellami, Abdellatif; Santhosh, Malavika E.; Siby, Nitha; Bhadra, Jolly; Ahmad, Zubair ( MDPI , 2023 , Article)This case study intends to comprehend students’ perceptions of social support in cultivating their interests and aspirations for science, mathematics, engineering, and technology (STEM) degrees and careers. Survey-based ... -
A lightweight neural network with multiscale feature enhancement for liver CT segmentation
Ansari, Mohammed Yusuf; Yang, Yin; Balakrishnan, Shidin; Abinahed, Julien; Al-Ansari, Abdulla; Warfa, Mohamed; Almokdad, Omran; Barah, Ali; Omer, Ahmed; Singh, Ajay Vikram; Meher, Pramod Kumar; Bhadra, Jolly; Halabi, Osama; Azampour, Mohammad Farid; Navab, Nassir; Wendler, Thomas; Dakua, Sarada Prasad... more authors ... less authors ( Nature Research , 2022 , Article)Segmentation of abdominal Computed Tomography (CT) scan is essential for analyzing, diagnosing, and treating visceral organ diseases (e.g., hepatocellular carcinoma). This paper proposes a novel neural network (Res-PAC-UNet) ... -
Long-Term Stability Analysis of 3D and 2D/3D Hybrid Perovskite Solar Cells Using Electrochemical Impedance Spectroscopy
Abdulrahim, Sumayya M.; Ahmad, Zubair; Bhadra, Jolly; Al-Thani, Noora Jabor ( MDPI , 2020 , Article)Despite the remarkable progress in perovskite solar cells (PSCs), their instability and rapid degradation over time still restrict their commercialization. A 2D capping layer has been proved to overcome the stability issues; ... -
Microstructure and mechanical properties of aluminum matrix composites with bimodal-sized hybrid NbC-B4C reinforcements
Aicha S., Lemine; Fayyaz, Osama; Yusuf, Moinuddin; Shakoor, R.A.; Ahmad, Zubair; Bhadra, Jolly; Al-Thani, Noora J.... more authors ... less authors ( Elsevier , 2022 , Article)Aluminum (Al) is an earth-abundant metal recognized with superior properties for vital applications in the aerospace and transportation industries. Structural components of Al exhibit poor performance due to its inherent ... -
Numerical modeling and performance optimization of carbon-based hole transport layer free perovskite solar cells
Ehsan, Raza; Ahmad, Zubair; Asif, Muhammad; Aziz, Fakhra; Riaz, Kashif; Mehmood, Muhammad Qasim; Bhadra, Jolly; Al-Thani, Noora J.... more authors ... less authors ( Elsevier , 2022 , Article)Owing to low production cost and ease of processing, hole-transport layer (HTL) free carbon electrode-based perovskite solar cells (c-PSCs) have emerged as a potential photovoltaic (PV) technology. Despite this, c-PCSs ... -
Numerical simulation analysis towards the effect of charge transport layers electrical properties on cesium based ternary cation perovskite solar cells performance
Ehsan, Raza; Ahmad, Zubair; Aziz, Fakhra; Asif, Muhammad; Ahmed, Ayyaz; Riaz, Kashif; Bhadra, Jolly; Al-Thani, Noora J.... more authors ... less authors ( Elsevier , 2021 , Article)In the present study, the device modeling of inverted architecture based on ITO/HTL/perovskite absorber/ETL/Ag was performed using a one-dimensional solar cell capacitance simulation (SCAPS-1D) program. Initially, device ... -
Optimum sintering method and temperature for cold compact Bismuth Telluride pellets for thermoelectric applications
F. Jaldurgam, Farheen; Ahmad, Zubair; Touati, Farid; Al Ashraf, Abdulla; Shakoor, Abdul; Bhadra, Jolly; J. Al-Thani, Noora; Suk Han, Dong; Altahtamouni, Talal... more authors ... less authors ( Elsevier , 2021 , Article)This work intends to investigate the optimum sintering method and temperature that can improve the efficiency of bismuth telluride cold compact pellets, for the thermoelectric applications. Different p-type and n-type ... -
The Prominent Roles of Undergraduate Mentors in an Online Near-Peer Mentoring Model
Al-Thani, Noora Jabor; Santhosh, Malavika E.; Bhadra, Jolly; Ahmad, Zubair ( MDPI , 2023 , Article)This study exemplifies a STEM-based online near-peer mentoring approach, incorporating 56 students (high and middle school mentees) and 16 secondary undergraduates (UG) mentors. The various constructive roles of UG mentors ... -
Promising transparent and flexible thermoelectric modules based on p-type CuI thin films—A review
Lemine, Aicha S.; Bhadra, Jolly; Al-Thani, Noora J.; Ahmad, Zubair ( Elsevier , 2022 , Article Review)The state-of-the-art thermoelectric technology owns a unique capability of direct, noise-free, and efficient conversion of waste heat into valuable electricity. The conventional thermoelectric generators are complex and ... -
QUYSC STEM Digilearning Model
Siby, Nitha; Elhawary, Enas; Bhadra, Jolly; Al-thani, Noora; Abouhashem, Azza; Magdy, Rana... more authors ... less authors ( Qatar University Press , 2021 , Poster)Covid-19 and the unprecedented shift in educational delivery, has revealed multiple perforations in the science-learning pedagogies. The technological replacements for a physical presence of an instructor and peer collaborated ...