Article
Physics, Condensed Matter
Seval Aksoy Pehlivanoglu
Summary: The study investigates the physical properties and optical behavior of Zn-doped NiO films, finding that the addition of Zn improves film smoothness and optoelectronic performance. Photodiodes exhibit good photosensitivity and linear response, with barrier heights determined using various methods for validation.
PHYSICA B-CONDENSED MATTER
(2021)
Article
Engineering, Electrical & Electronic
S. A. Al-Ghamdi, Taymour A. Hamdalla, E. F. M. El-Zaidia, Ahmed Obaid M. Alzahrani, Nawal Alghamdi, Syed Khasim, I. S. Yahia, A. A. A. Darwish
Summary: Phthalocyanines are promising materials with unique properties, and the GaClPc/n-Si HJ has been studied for its structural and electronic characteristics, showing potential for applications in photodiode devices.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2022)
Article
Engineering, Electrical & Electronic
Anshuman Shastri, Irfan Ullah, Benito Sanz-Izquierdo
Summary: This paper describes dual operations of AC current sensing and Bluetooth transmission using a reconfigurable slot antenna. A novel current sensing setup is created by connecting a tunable antenna to a current transformer and AC/DC converter. It can detect the power and current monitoring in household electrical devices, providing an energy-efficient solution while also operating as a transmitter via Bluetooth.
IEEE SENSORS JOURNAL
(2021)
Article
Engineering, Electrical & Electronic
Bokuan Yang, Jun Chen
Summary: This paper discusses the capacitance issues in photodiodes, focusing on diffusion capacitance and depletion capacitance, as well as exploring the impact of delay factor on capacitance.
OPTICAL AND QUANTUM ELECTRONICS
(2021)
Article
Materials Science, Multidisciplinary
E. Erdogan, M. Yilmaz, S. Aydogan, U. Incekara, Y. Sahin
Summary: In this study, a metal-semiconductor contact with an organic interlayer was fabricated, and the electrical parameters of the device were extracted using different methods. The results show that the interface cannot conduct AC signals at sufficiently high frequencies.
Article
Physics, Applied
Mehmet Yilmaz, Fatma Yildirim, Sakir Aydogan, Adem Kocyigit
Summary: In this study, ZnO flake interlayers were fabricated by the electrochemical deposition technique on p-Si to form Au/ZnO/p-Si heterostructures. The results showed that the heterostructures exhibited good capacitive performance and photoelectric characteristics.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2023)
Article
Automation & Control Systems
Hung-Chi Chen, Yin-Chun Lan
Summary: This article focuses on the study of the voltage doubler PFC converter with two boost inductors and one series-capacitor. The conventional multiloop control can only be directly applied to this type of converter if both symmetrical duty ratios are larger than 0.5 due to its topology asymmetry. To overcome this limitation, a multiloop control with two duty-ratio feedforward current loops is proposed, which includes sensing the series-capacitor current to reconstruct the inductor currents. The proposed method is implemented and validated through simulation and experimental results on a field programmable gate array chip.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2023)
Article
Materials Science, Multidisciplinary
S. Saha, A. K. Das, S. Sinha, R. Karmakar, R. Hatada, W. Ensinger, S. Flege, K. Baba, A. K. Meikap
Summary: The effect of molybdenum doping and acetylene gas flow rate on the electrical properties of diamond like carbon films is reported. Molybdenum doping increased the dielectric constant and the change in flow rate affected the bonding type in the film. The ac conductivity of the films increased with frequency and showed two plateau regions with 29% molybdenum doping. The experimental data indicated the occurrence of both ionic conduction and polaron hopping.
DIAMOND AND RELATED MATERIALS
(2023)
Article
Instruments & Instrumentation
Chaozhi Li, Jinlong Zhao, Hongrui Cao, Liqun Hu, Kaiyun Chen, Zijun Zhang
Summary: The irradiated SPDA experiences a nonlinear trend in output signal during irradiation experiments, with the final signal in the visible light region being about 5.6% of the original one. Tests on EAST show that the irradiated XD2 signal is 70%-80% of a non-irradiated XD3 signal.
REVIEW OF SCIENTIFIC INSTRUMENTS
(2021)
Article
Engineering, Electrical & Electronic
Mathias Poik, Thomas Hackl, Stefano Di Martino, Martin Schober, Jin Dang, Georg Schitter
Summary: This study presents a contactless voltage sensing method for measuring RF voltages within microwave devices. By using a conductive cantilever probe with a sharp tip as a sensor and combining it with a model-based compensation method, high spatial resolution measurements are achieved.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2023)
Article
Energy & Fuels
Tobias Kemmer, Johannes M. Greulich, Alexander Krieg, Stefan Rein
Summary: The measurement of current-voltage (IV) characteristics is crucial for the quality control and optimization of silicon solar cells in research and industrial production. A novel procedure was proposed to reconstruct quasi-steady-state (qss) IV characteristics by aligning the generalized current density. Experimental verification showed the applicability of the approach.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2022)
Article
Engineering, Electrical & Electronic
Niksa Tadic, Milan Resetar, Milena Erceg, Alija Dervic
Summary: This article presents a current-mode interface (CMI) with mixed single/dual slope integration (MSDSI) for differential capacitive sensors (DCSs). The design integrates the reference current flowing through the DCS capacitors. Dual slope integration is used for the smaller capacitance, while single slope integration is used for the larger capacitance. The normalized differential capacitance (NDC), defined as the difference-to-sum ratio of the DCS capacitances, is digitized using the counting method without the need for postprocessing. The prototyped system achieves a full-scale error smaller than 0.3% with a conversion speed ranging from 1770 to 2755 NDC-to-time-to-digital conversions per second.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2023)
Article
Engineering, Electrical & Electronic
Ali Riza Deniz
Summary: This study investigated the production and electrical characterization of Schottky circuit elements of Au/CoO/p-Si/Al (MIS) structure. Diode parameters such as the ideality factor (n), barrier height (φb), and series resistance of the structures were calculated using different methods and their variations with temperature were examined. Additionally, the diffusion potential (Vd), barrier height (φb), Fermi energy level (Ef), and free carrier concentration (Na) were calculated from the C-V measurements and their variations with frequency were examined.
MICROELECTRONICS RELIABILITY
(2023)
Article
Physics, Multidisciplinary
Ming Chu, Shao-Bo Liu, An-Ran Yu, Hao-Miao Yu, Jia-Jun Qin, Rui-Chen Yi, Yuan Pei, Chun-Qin Zhu, Guang-Rui Zhu, Qi-Zeng, Xiao-Yuan Hou
Summary: A three-element equivalent circuit model is proposed to address the invalidation of commonly employed series model and parallel model in C-V characterization of organic thin films with significant current injection. The real capacitance expression considering current injection is theoretically derived and validated through a simulating circuit. This work demonstrates the necessity to consider current injection in C-V measurement and provides a strategy for accurate C-V characterization experimentally.
Article
Engineering, Manufacturing
Nurzhan Zhuldassov, Yimajian Yan, Mikhail Popovich, Eby G. Friedman
Summary: With the scaling of semiconductors, there has been a significant increase in power density in VLSI circuits, leading to more stringent requirements on power noise and voltage variations. This article focuses on the use of active capacitors, which provide higher density capacitance compared to passive capacitors, on the package and board level. The results show that active capacitors can effectively reduce voltage drop and meet the requirements for voltage variations in high current systems.
IEEE TRANSACTIONS ON COMPONENTS PACKAGING AND MANUFACTURING TECHNOLOGY
(2023)
Article
Chemistry, Analytical
Yi Xu, Waqas Ahmad, Md Mehedi Hassan, Huanhuan Li, Qin Ouyang, Quansheng Chen
Summary: A novel g-C3N4 nanosheets-assisted upconversion fluorescent aptasensor was developed for Staphylococcus aureus detection using hybridization chain reaction (HCR). The presence of S. aureus activated the HCR system and resulted in a decrease in peroxidase-like activity of g-C3N4 nanosheets and fluorescence recovery proportional to the concentration of S. aureus. The method showed acceptable recoveries in real food samples and was validated by a traditional plate counting method.
ANALYTICA CHIMICA ACTA
(2023)
Letter
Peripheral Vascular Disease
Menhas Ahmad, Waqas Ahmad, Satesh Kumar
Article
Chemistry, Analytical
Baoning Wang, Waqas Ahmad, Quansheng Chen, Qin Ouyang
Summary: A sensitive fluorescence nanosensor was developed for the detection of nitrite in pickled meat products, offering rapid detection and low detection limits.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Review
Chemistry, Multidisciplinary
Waqas Ahmad, Jiang Wu, Qiandong Zhuang, Arup Neogi, Zhiming Wang
Summary: This review presents the latest developments in fabricating broadband photodetectors based on conventional 2D transition metal dichalcogenides (TMDCs). It focuses on the recent progress in group-10 TMDCs in terms of lattice structure and synthesis techniques. The review also discusses the applications of group-10 TMDCs in nanoelectronics and optoelectronics, and provides perspectives for next-generation broadband photodetectors.
Article
Energy & Fuels
Shammas Mushtaq, Sofia Tahir, Arslan Ashfaq, Ruy Sebastian Bonilla, Muhammad Haneef, Rabia Saeed, Waqas Ahmad, Nasir Amin
Summary: This study reports a modeling-guided device optimization process to design highly efficient lead-free n-i-p methyl ammonium tin bromide (MASnBr3) perovskite solar cells. The influence of different parameters on the performance of MASnBr3 devices is thoroughly investigated using numerical simulations. An optimized device structure is proposed, showing the potential of MASnBr3 as a nontoxic perovskite for renewable energy.
Article
Engineering, Environmental
Waqar Ahmad, Muhammad Zubair, Mahmood Ahmed, Muhammad Ahmad, Shoomaila Latif, Abdul Hameed, Qudsia Kanwal, Dure Najaf Iqbal
Summary: The generation of solid waste is increasing due to rapid urbanization and industrialization, and the leachate leakages from landfills pose a threat to human health. This study analyzed the composition of metals and metalloid in soil samples using inductively coupled plasma-optical emission spectrometric studies. The results showed that the levels of metals in the soil were within the permissible limits set by international standards. However, soil contamination with mercury and cadmium posed an ecological risk. Children were found to have the highest exposure to metals through soil, and the cancer risk for chromium was observed to be at the lower edge.
ENVIRONMENTAL GEOCHEMISTRY AND HEALTH
(2023)
Article
Chemistry, Applied
Xiaodan Ding, Waqas Ahmad, Jizhong Wu, Yawen Rong, Qin Ouyang, Quansheng Chen
Summary: An ultrasensitive detection strategy for ciprofloxacin (CIP) has been developed using copper ions-induced charge transfer in poly acrylic acid (PAA) functionalized upconversion nanoparticles (UCNPs)/2,2-bipyridine (bipy) system. Copper ions adhere to the surface of PAA-UCNPs, deactivating fluorescence, while bipy controls aggregation. CIP coordinates with the bipy-Cu complex, causing the release of trapped fluorescence. The method shows a good calibration plot (0.05-1000 ng/mL) and a detection limit of 0.13 ng/mL.
Article
Chemistry, Applied
W. Ahmad, E. H. Aljuhani, H. Alwael, E. A. Assirey, H. M. Nassef, M. S. El-Shahawi
Summary: The electrochemical behavior and adsorption properties of food colorant erythrosine b (E127) were investigated and a sensitive analysis method was developed. The energy levels, absorption, and redox potentials of E127 were determined using computational methods. Experimental results validated the proposed redox mechanism and allowed for the detection of E127 in various samples.
JOURNAL OF FOOD COMPOSITION AND ANALYSIS
(2023)
Article
Materials Science, Multidisciplinary
Kaffayatullah Khan, Waqas Ahmad, Muhammad Nasir Amin, Ahmed Farouk Deifalla
Summary: This study investigated the effect of eggshell powder on the water-absorption capacity of cement mortar through experimental testing and machine learning modeling. The results showed that the addition of eggshell powder reduced the water absorption capacity of the cement mortar. The ML models constructed exhibited good agreement with the experimental results and can be used to determine the water absorption of cement mortar incorporating eggshell powder.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Review
Oncology
Muhammad Asif Ali, Noohela Khan, Nabeeha Kaleem, Waqas Ahmad, Salem Hussain Alharethi, Bandar Alharbi, Hassan H. Alhassan, Maher M. Al-Enazi, Ahmad Faizal Abdull Razis, Babagana Modu, Daniela Calina, Javad Sharifi-Rad
Summary: Sulforaphane is an isothiocyanate with diverse biomedical applications. It can be extracted from plants, with broccoli sprouts being the richest source. This review paper aims to summarize the mechanisms behind sulforaphane's anticancer potential, concluding that it alters epigenetic and non-epigenetic pathways for cancer protection. Further research is needed for standard dosing.
FRONTIERS IN ONCOLOGY
(2023)
Article
Construction & Building Technology
Nanlan Wang, Zhengjun Xia, Muhammad Nasir Amin, Waqas Ahmad, Kaffayatullah Khan, Fadi Althoey, Hisham Alabduljabbar
Summary: This study investigates the impact of eggshell powder (ESP) on cement mortar exposed to an acidic environment using testing and machine learning modeling. The results show that the addition of ESP can reduce the loss of cement mortar, and the developed ML models are in good agreement with the experimental findings.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Engineering, Multidisciplinary
Waqas Ahmad, Muhammad Munsif, Habib Ullah, Mohib Ullah, Alhanouf Abdulrahman Alsuwailem, Abdul Khader Jilani Saudagar, Khan Muhammad, Muhammad Sajjad
Summary: The recognition of different activities in sports, especially cricket, has gained attention in recent years. Existing methods in this area often rely on hand-crafted features due to limited availability of public data. In this study, a cricket activities dataset and a deep learning model combining CNN layers and LSTM cells were proposed. The results show that the proposed model outperforms other recurrent neural networks and achieves high accuracy, recall, and F1 score. The code and dataset are publicly available for further research.
ALEXANDRIA ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Waqas Ahmad, Sajid Ullah, Imtiaz Ahmad, Taj Muhammad, Yu Shuang Ren, Muhammad Ilyas
Summary: This article describes the synthesis of graphene oxide (GO) from fish scales and its application for removing organic contaminants from refinery wastewater. Characterization using XRD, FTIR, SEM, and EDX analysis showed that the synthesized GO had a consistent structure. The GO exhibited a rough, porous, and layered morphology similar to two-dimensional sheets of GO. The adsorption process of the adsorbent followed a pseudo-2nd order kinetic model and maintained high efficiency over multiple cycles.
ENVIRONMENTAL SCIENCE-WATER RESEARCH & TECHNOLOGY
(2023)
Article
Computer Science, Information Systems
Waqas Ahmad, Hikmat Ullah Khan, Tassawar Iqbal, Saqib Iqbal
Summary: Sentiment analysis is a popular research field in the current era due to its wide range of applications. This study proposes an Attention-based Multi-Channel Gated Recurrent Neural Network (Att-MC-GRU) for aspect extraction and sentiment classification. The method combines word embedding, part of speech tags, and contextual position information, and achieves higher accuracy compared to existing techniques.
Article
Pharmacology & Pharmacy
Feras Falih, Habibah A. Wahab, Waqas Ahmad
Summary: The aim of this study was to investigate the effects of formulation parameters on the physicochemical characteristics of quercetin-loaded polymeric nanoparticles. The results showed that the amount of polymer had the greatest impact on the particle characteristics, while the pluronic F-68 concentration had the greatest impact on PDI and zeta potential.
JOURNAL OF POPULATION THERAPEUTICS AND CLINICAL PHARMACOLOGY
(2023)
