223 results on '"Arif U"'
Search Results
2. Fruit Quality Monitoring with Smart Packaging
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Arif U. Alam, Pranali Rathi, Heba Beshai, Gursimran K. Sarabha, and M. Jamal Deen
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smart packaging ,intelligent packaging ,active packaging ,fresh produce ,fruit quality ,fruit processing ,Chemical technology ,TP1-1185 - Abstract
Smart packaging of fresh produce is an emerging technology toward reduction of waste and preservation of consumer health and safety. Smart packaging systems also help to prolong the shelf life of perishable foods during transport and mass storage, which are difficult to regulate otherwise. The use of these ever-progressing technologies in the packaging of fruits has the potential to result in many positive consequences, including improved fruit quality, reduced waste, and associated improved public health. In this review, we examine the role of smart packaging in fruit packaging, current-state-of-the-art, challenges, and prospects. First, we discuss the motivation behind fruit quality monitoring and maintenance, followed by the background on the development process of fruits, factors used in determining fruit quality, and the classification of smart packaging technologies. Then, we discuss conventional freshness sensors for packaged fruits including direct and indirect freshness indicators. After that, we provide examples of possible smart packaging systems and sensors that can be used in monitoring fruits quality, followed by several strategies to mitigate premature fruit decay, and active packaging technologies. Finally, we discuss the prospects of smart packaging application for fruit quality monitoring along with the associated challenges and prospects.
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- 2021
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3. Freshness Monitoring of Packaged Vegetables
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Heba Beshai, Gursimran K. Sarabha, Pranali Rathi, Arif U. Alam, and M. Jamal Deen
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smart packaging ,intelligent systems ,active packaging ,sensors ,indicators ,RFID tags ,Technology ,Engineering (General). Civil engineering (General) ,TA1-2040 ,Biology (General) ,QH301-705.5 ,Physics ,QC1-999 ,Chemistry ,QD1-999 - Abstract
Smart packaging is an emerging technology that has a great potential in solving conventional food packaging problems and in meeting the evolving packaged vegetables market needs. The advantages of using such a system lies in extending the shelf life of products, ensuring the safety and the compliance of these packages while reducing the food waste; hence, lessening the negative environmental impacts. Many new concepts were developed to serve this purpose, especially in the meat and fish industry with less focus on fruits and vegetables. However, making use of these evolving technologies in packaging of vegetables will yield in many positive outcomes. In this review, we discuss the new technologies and approaches used, or have the potential to be used, in smart packaging of vegetables. We describe the technical aspects and the commercial applications of the techniques used to monitor the quality and the freshness of vegetables. Factors affecting the freshness and the spoilage of vegetables are summarized. Then, some of the technologies used in smart packaging such as sensors, indicators, and data carriers that are integrated with sensors, to monitor and provide a dynamic output about the quality and safety of the packaged produce are discussed. Comparison between various intelligent systems is provided followed by a brief review of active packaging systems. Finally, challenges, legal aspects, and limitations facing this smart packaging industry are discussed together with outlook and future improvements.
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- 2020
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4. Dynamic Allostery Modulates Catalytic Activity by Modifying the Hydrogen Bonding Network in the Catalytic Site of Human Pin1
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Jing Wang, Ryosuke Kawasaki, Jun-ichi Uewaki, Arif U. R. Rashid, Naoya Tochio, and Shin-ichi Tate
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dynamic allostery ,human Pin1 ,structure dynamics ,spin relaxation ,hydrogen bond ,H/D exchange ,NMR ,Organic chemistry ,QD241-441 - Abstract
Allosteric communication among domains in modular proteins consisting of flexibly linked domains with complimentary roles remains poorly understood. To understand how complementary domains communicate, we have studied human Pin1, a representative modular protein with two domains mutually tethered by a flexible linker: a WW domain for substrate recognition and a peptidyl-prolyl isomerase (PPIase) domain. Previous studies of Pin1 showed that physical contact between the domains causes dynamic allostery by reducing conformation dynamics in the catalytic domain, which compensates for the entropy costs of substrate binding to the catalytic site and thus increases catalytic activity. In this study, the S138A mutant PPIase domain, a mutation that mimics the structural impact of the interdomain contact, was demonstrated to display dynamic allostery by rigidification of the α2-α3 loop that harbors the key catalytic residue C113. The reduced dynamics of the α2-α3 loop stabilizes the C113–H59 hydrogen bond in the hydrogen-bonding network of the catalytic site. The stabilized hydrogen bond between C113 and H59 retards initiation of isomerization, which explains the reduced isomerization rate by ~20% caused by the S138A mutation. These results provide new insight into the interdomain allosteric communication of Pin1.
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- 2017
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5. Mifepristone promotes adiponectin production and improves insulin sensitivity in a mouse model of diet-induced-obesity.
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Takeshi Hashimoto, Junsuke Igarashi, Arif U Hasan, Koji Ohmori, Masakazu Kohno, Yukiko Nagai, Tetsuo Yamashita, and Hiroaki Kosaka
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Medicine ,Science - Abstract
The steroid receptor antagonist mifepristone is used as an anti-cancer agent, eliciting both cytostatic and cytotoxic effects on malignant cells. However, the metabolic effects of long-term treatment with mifepristone have remained unclear. The effects of mifepristone on insulin sensitivity and adiponectin secretion were evaluated both in in vivo and in vitro. First, we explored the effects of mifepristone, on metabolic functions in obese mice receiving a high-fat diet. When these mice were fed mifepristone, they exhibited a marked improvement in insulin sensitivity, attenuated hepatic injury, and decreased adipocyte size, compared with mice that received only the high-fat diet. Intriguingly, mifepristone-treated mice showed significantly elevated plasma adiponectin levels. Second, we tested the effects of mifepristone on differentiated 3T3-L1 adipocytes in vitro. When differentiated adipocytes were treated with mifepristone for 48 h, adiponectin was upregulated at both mRNA and protein levels. Collectively, these results reveal novel actions of mifepristone on metabolic functions, in vivo and in vitro, in which the drug exerts antidiabetic effects associated with an upregulation in adiponectin-secretion.
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- 2013
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6. Surface-functionalized spongy zinc ferrite as a robust visible-light driven nanocatalyst for wastewater remediation: characterization, kinetic, and mechanistic insight
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Fei, L., Ali, F., Said, A., Tariq, N., Raziq, F., Ali, N., Arif, U., Akhter, M. S., Rahdar, A., and Bilal, M.
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- 2023
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7. Numerical investigation on effects of entropy generation and dispersion of hybrid nanoparticles on thermal and mass transfer in MHD Maxwell fluid
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Nawaz, M. and Arif, U.
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- 2022
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8. Open-Source Low-Cost Wireless Potentiometric Instrument for pH Determination Experiments
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Jin, Hao, Qin, Yiheng, Pan, Si, Alam, Arif U., Dong, Shurong, Ghosh, Raja, and Deen, M. Jamal
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pH determination is an essential experiment in many chemistry laboratories. It requires a potentiometric instrument with extremely low input bias current to accurately measure the voltage between a pH sensing electrode and a reference electrode. In this technology report, we propose an open-source potentiometric instrument for pH determination experiments with Bluetooth wireless connectivity. The hardware is built on a solderless breadboard and mainly composed of an Arduino Nano microcontroller, a 16-bit analog-to-digital converter, two electronic buffer amplifiers, a temperature sensor, and a Bluetooth module with a total cost around $50 (US dollars, including a portable power supply ~$10). The software is written in Arduino Sketch and the cross-platform Python language, both of which the students can access and modify freely. The instrument was demonstrated with a traditional glass electrode and a custom palladium/palladium oxide pH sensing electrode, and compared with a commercial pH meter. Results showed that both the accuracy and precision of the developed instrument are adequate for teaching purposes. Understanding the workings of electronics of the pH meter can inform the students of the mechanism of pH determination.
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- 2018
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9. Integrated water quality monitoring system with pH, free chlorine, and temperature sensors
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Qin, Yiheng, Alam, Arif U., Pan, Si, Howlader, Matiar M.R., Ghosh, Raja, Hu, Nan-Xing, Jin, Hao, Dong, Shurong, Chen, Chih-Hung, and Deen, M. Jamal
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- 2018
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10. Effects of Generative/Destructive Chemical Reaction on Mass Transport in Williamson Liquid with Variable Thermophysical Properties
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Nawaz, M., Arif, U., Rana, Sh., and Alharbi, S.
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- 2019
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11. Modelling the effect of tool material on material removal rate in electric discharge machining
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Arif, U., primary
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- 2023
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12. Low-temperature solution processing of palladium/palladium oxide films and their pH sensing performance
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Qin, Yiheng, Alam, Arif U., Pan, Si, Howlader, Matiar M.R., Ghosh, Raja, Selvaganapathy, P. Ravi, Wu, Yiliang, and Deen, M. Jamal
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- 2016
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13. Increase in tumor suppressor Arf compensates gene dysregulation in in vitro aged adipocytes
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Hasan, Arif U., Ohmori, Koji, Hashimoto, Takeshi, Kamitori, Kazuyo, Yamaguchi, Fuminori, Konishi, Kumi, Noma, Takahisa, Igarashi, Junsuke, Yamashita, Tetsuo, Hirano, Katsuya, Tokuda, Masaaki, Minamino, Tetsuo, Nishiyama, Akira, and Kohno, Masakazu
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- 2017
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14. In-silico, Antioxidant and Antiepileptic Effect of N(2,3-methylenedioxy-4benzoyloxy-phenthylamine)-3,4-dimethyl-1, propanoamide Derivatives
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G A Miana, G A Miana, primary, M Kanwal, M Kanwal, additional, S Maqsood, S Maqsood, additional, Z Tariq, Z Tariq, additional, F Ali Shah, F Ali Shah, additional, H Saddam, H Saddam, additional, and M Umar Farooq and Arif U Khan, M Umar Farooq and Arif U Khan, additional
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- 2022
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15. DEVELOPMENT AND ANALYSIS OF A CONCEPTUAL MODEL OF BIOMETRIC INFORMATION FROM THE POINT OF VIEW OF THE EXISTING LEGISLATIVE AND REGULATORY FRAMEWORKS
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Evgeny V. Gritskevich, Arif U. Matveev, and Sergei V. Shurugin
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Development (topology) ,Biometrics ,Point (typography) ,Computer science ,Conceptual model (computer science) ,Legislature ,Data science - Abstract
The proposed work is devoted to the classification of biometric systems for recognizing subjects, which play an important role in modern information security systems, since they are currently one of the main means of identification and authentication of an individual. The classification schemes presented in this paper allow us to apply a systematic approach to the development of new methods of biometrics.
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- 2021
16. Hybrid millimeter wave heterogeneous networks with spatially correlated user equipment
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Arif Ullah, Ziaul Haq Abbas, Ghulam Abbas, Fazal Muhammad, and Jae-Mo Kang
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Downlink cell association ,Heterogeneous cellular networks ,Integrated sub-6GHz and mmWave networks ,Millimeter wave communications ,Poisson cluster process ,Information technology ,T58.5-58.64 - Abstract
In this paper, we analyze a hybrid Heterogeneous Cellular Network (HCNet) framework by deploying millimeter Wave (mmWave) small cells with coexisting traditional sub-6GHz macro cells to achieve improved coverage and high data rate. We consider randomly-deployed macro base stations throughout the network whereas mmWave Small Base Stations (SBSs) are deployed in the areas with high User Equipment (UE) density. Such user centric deployment of mmWave SBSs inevitably incurs correlation between UE and SBSs. For a realistic scenario where the UEs are distributed according to Poisson cluster process and directional beamforming with line-of-sight and non-line-of-sight transmissions is adopted for mmWave communication. By using tools from stochastic geometry, we develop an analytical framework to analyze various performance metrics in the downlink hybrid HCNets under biased received power association. For UE clustering we considered Thomas cluster process and derive expressions for the association probability, coverage probability, area spectral efficiency, and energy efficiency. We also provide Monte Carlo simulation results to validate the accuracy of the derived expressions. Furthermore, we analyze the impact of mmWave operating frequency, antenna gain, small cell biasing, and BSs density to get useful engineering insights into the performance of hybrid mmWave HCNets. Our results show that network performance is significantly improved by deploying millimeter wave SBS instead of microwave BS in hot spots.
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- 2024
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17. Preventing Impaired Driving Using IoT on Steering Wheels Approach
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Siti Fatimah Abdul Razak, Sumendra Yogarayan, and Arif Ullah
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impaired driver ,alcohol intoxication ,internet of things ,sensors. ,Technological innovations. Automation ,HD45-45.2 - Abstract
To drive safely, one must be attentive, coordinated, have good judgment, and be able to respond quickly to changing conditions. In certain countries, improving safety may depend largely on reducing the number of impaired drivers on the road. Therefore, solutions are required to reduce the risk that is posed on the road by drivers who have been consuming alcohol while driving. Previous research has proposed the use of sensors for detecting driver impairment caused by alcohol intoxication. However, relying on a gas sensor alone may not be appropriate for detection. To reduce drunk driving, this study proposes an Internet of Things (IoT)-based tool that measures heart rate and analyzes the breath of a driver for traces of alcohol. The tool represents a vehicle that is made up of a DC motor. In the circumstance that the tool detects a higher than resting heart rate in the driver as well as an amount of alcohol in the driver’s breath sample, the tool will immediately power down the DC motor and send an SMS to the registered emergency contact with the driver’s precise position using the GPS module. The initial prototype demonstrates the tool as a potential aftermarket accessory for vehicles. The implication of this paper is that the designed tool might be of practical use to researchers in their attempts to determine and obtain information on alcohol intoxication. Doi: 10.28991/HIJ-2024-05-02-012 Full Text: PDF
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- 2024
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18. Insights into measles virus: Serological surveillance and molecular characterization
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Zainab Khalid, Javed Muhammad, Hina Ali, Muhammad Suleman Rana, Muhammad Usman, Muhammad Masroor Alam, Riaz Ullah, Arif Ullah, Massab Umair, Ashfaq Ahmad, Muhammad Salman, Aamer Ikram, Amjad Khan, and Ahmed Bari
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Measles ,Pakistan ,Molecular Epidemiology ,Vaccination ,And IgM Antibodies ,Infectious and parasitic diseases ,RC109-216 ,Public aspects of medicine ,RA1-1270 - Abstract
Background: Measles has been a significant public health concern in Pakistan, especially in the Khyber Pakhtunkhwa (KPK) province, where sporadic and silent epidemics continue to challenge existing control measures. This study aimed to estimate the prevalence and investigate the molecular epidemiology of the measles virus (MeV) in KPK and explore the vaccination status among the suspected individuals. Methods: A cross-sectional study was conducted between February and October 2021. A total of 336 suspected measles cases from the study population were analyzed for IgM antibodies using Enzyme-Linked Immunosorbent Assay (ELISA). Throat swabs were randomly collected from a subset of positive cases for molecular analysis. Phylogenetic analysis of MeV isolates was performed using the neighbor-joining method. The vaccination status of individuals was also recorded. Results: Among the suspected participants, 61.0% (205/336) were ELISA positive for IgM antibodies, with a higher prevalence in males (64.17%) compared to females (57.04%). The majority of cases (36.0%) were observed in infants and toddlers, consistent with previous reports. The majority of IgM-positive cases (71.7%) had not received any dose of measles vaccine, highlighting gaps in vaccine coverage and the need for improved immunization programs. Genetic analysis revealed that all MeV isolates belonged to the B3 genotype, with minor genetic variations from previously reported variants in the region. Conclusion: This study provides valuable insights into the genetic epidemiology of the MeV in KPK, Pakistan. The high incidence of measles infection among unvaccinated individuals highlights the urgency of raising awareness about vaccine importance and strengthening routine immunization programs.
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- 2024
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19. First report of Tomato leaf curl New Delhi virus infecting tomato and cucumber in Estonia
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Just, K., primary, Allika, R., additional, Sman, P., additional, Arif, U., additional, Ilau, B., additional, Koidumaa, R., additional, Lasner, H., additional, Ermakovich, V., additional, Bukštunovitš, J., additional, and Kvarnheden, A., additional
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- 2022
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20. Surface-functionalized spongy zinc ferrite as a robust visible-light driven nanocatalyst for wastewater remediation: characterization, kinetic, and mechanistic insight
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Fei, L., primary, Ali, F., additional, Said, A., additional, Tariq, N., additional, Raziq, F., additional, Ali, N., additional, Arif, U., additional, Akhter, M. S., additional, Rahdar, A., additional, and Bilal, M., additional
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- 2022
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21. Numerical study of simultaneous transport of heat and mass transfer in Maxwell hybrid nanofluid in the presence of Soret and Dufour effects
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Arif, U, primary, Nawaz, M, additional, and Salmi, Abdelatif, additional
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- 2022
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22. Formulation and In Vitro Assessment of Polymeric pH-Responsive Nanogels of Chitosan for Sustained Delivery of Madecassoside
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Muhammad Suhail, I-Hui Chiu, Arif Ullah, Arshad Khan, Hamid Ullah, Noorah Saleh Al-Sowayan, and Pao-Chu Wu
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Chemistry ,QD1-999 - Published
- 2024
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23. A deep learning framework for non-functional requirement classification
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Kiramat Rahman, Anwar Ghani, Sanjay Misra, and Arif Ur Rahman
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Medicine ,Science - Abstract
Abstract Analyzing, identifying, and classifying nonfunctional requirements from requirement documents is time-consuming and challenging. Machine learning-based approaches have been proposed to minimize analysts’ efforts, labor, and stress. However, the traditional approach of supervised machine learning necessitates manual feature extraction, which is time-consuming. This study presents a novel deep-learning framework for NFR classification to overcome these limitations. The framework leverages a more profound architecture that naturally captures feature structures, possesses enhanced representational power, and efficiently captures a broader context than shallower structures. To evaluate the effectiveness of the proposed method, an experiment was conducted on two widely-used datasets, encompassing 914 NFR instances. Performance analysis was performed on the applied models, and the results were evaluated using various metrics. Notably, the DReqANN model outperforms the other models in classifying NFR, achieving precision between 81 and 99.8%, recall between 74 and 89%, and F1-score between 83 and 89%. These significant results highlight the exceptional efficacy of the proposed deep learning framework in addressing NFR classification tasks, showcasing its potential for advancing the field of NFR analysis and classification.
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- 2024
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24. WiFi-Based Human Sensing With Deep Learning: Recent Advances, Challenges, and Opportunities
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Iftikhar Ahmad, Arif Ullah, and Wooyeol Choi
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Deep learning ,device-based sensing ,device-free sensing ,human activity recognition ,human pose estimation ,indoor localization ,Telecommunication ,TK5101-6720 ,Transportation and communications ,HE1-9990 - Abstract
The rapid advancements in wireless technologies have led to numerous research studies that provide evidence of the successful utilization of wireless signals, particularly, WiFi signals for human activity sensing in the indoor environment. As a promising technology, WiFi-based human sensing can be utilized for a variety of applications such as smart healthcare, smart homes, security, industry, office indoor environments etc., due to the availability of rich infrastructure. Furthermore, compared to other radio frequency (RF) based systems such as radio detection and ranging (RADAR) and radio frequency identification (RFID), WiFi is non-invasive, has low-cost, and provides ubiquitous coverage in the indoor setup. However, due to the limited accuracy and high complexity of the model-based approaches for human sensing, the systems empowered by the deep learning (DL) techniques have achieved remarkable performance gains and showed more robustness in dealing with complicated human sensing tasks. The article explores the physical layer parameters used in WiFi sensing such as received signal strength indicator (RSSI) and channel state information (CSI), the estimated parameters such as angle-of-arrival (AoA) and Doppler shift (DS) along with frequency modulated continuous wave (FMCW) RADAR technology. Moreover, the preliminary signal processing stages that are applied to the received WiFi signals in the DL assisted systems are discussed. This article provides a comprehensive literature survey on the recent advances in DL-empowered WiFi sensing focusing on human activity recognition and movement tracking followed by fall detection, single task-multi task classification, crowd monitoring and sensing, indoor localization, gaits recognition, and pose estimation. Furthermore, the paper highlight the challenges in the existing literature and discusses the possible future research directions in WiFi-based human sensing assisted by DL techniques.
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- 2024
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25. Molecular identification and genotyping of hepatitis E virus from Southern Punjab, Pakistan
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Muhammad Muddassir Ali, Mehek Gul, Muhammad Imran, Muhammad Ijaz, Shahan Azeem, Arif Ullah, and Hafiz Muhammad Farooq Yaqub
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Medicine ,Science - Abstract
Abstract Hepatitis E is a global health concern. Hepatitis E virus (HEV) infection is endemic in Pakistan. HEV has four genotypes: HEV-1 through HEV-4. The genotypes HEV-1 and HEV-2 are associated with infection in humans, especially in countries with poor sanitation. The genotypes HEV-3 and HEV-4 are zoonotic and human infection takes place by consuming undercooked meat or being in contact with animals. The present study was designed to ascertain the presence of HEV in the Southern Punjab region of Pakistan. First, blood samples (n = 50) were collected from patients suspected of infection with the hepatitis E virus from the Multan District. The serum was separated and the samples were initially screened using an HEV IgM-ELISA. Second, the ELISA-positive samples were subjected to PCR and were genetically characterized. For PCR, the RNA extraction and complementary DNA synthesis were done using commercial kits. The HEV ORF2 (Open Reading Frame-2, capsid protein) was amplified using nested PCR targeting a 348 bp segment. The PCR amplicons were sequenced and an evolutionary tree was constructed using MEGA X software. A protein model was built employing the SWISS Model after protein translation using ExPASy online tool. The positivity rate of anti-HEV antibodies in serum samples was found as 56% (28/50). All Pakistani HEV showed homology with genotype 1 and shared common evolutionary origin and ancestry with HEV isolates of genotype 1 of London (MH504163), France (MN401238), and Japan (LC314158). Sequence analysis of motif regions assessment and protein structure revealed that the sequences had a similarity with the reference sequence. These data suggest that genotype 1 of HEV is circulating in Pakistan. This finding could be used for the diagnosis and control of HEV in the specific geographic region focusing on its prevalent genotype.
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- 2024
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26. Multi-Objective Reinforcement Learning for Power Allocation in Massive MIMO Networks: A Solution to Spectral and Energy Trade-Offs
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Youngwoo Oh, Arif Ullah, and Wooyeol Choi
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5G and beyond networks ,energy efficiency ,massive MIMO ,multi-objective reinforcement learning ,power allocation ,spectral efficiency ,Electrical engineering. Electronics. Nuclear engineering ,TK1-9971 - Abstract
The joint optimization of spectral efficiency (SE) and energy efficiency (EE) through power allocation (PA) techniques is a critical requirement for emerging fifth-generation and beyond networks. The trade-off between SE and EE becomes challenging in the massive multiple-input-multiple-output (MIMO) equipped base stations (BSs) in multi-cell cellular networks. Various algorithmic approaches including genetic algorithms and convex optimization have been considered to optimize the trade-offs between SE and EE in cellular networks. However, these methods suffer from high computational costs. A promising deep reinforcement learning technique is capable of addressing the computational challenges of single-objective optimization problems in wireless networks. Furthermore, multi-objective reinforcement learning has been employed for multi-objective optimization problems and can be utilized to jointly enhance the SE and EE in cellular networks. In this paper, we propose a downlink (DL) transmit PA method based on a multi-objective asynchronous advantage single actor-multiple critics (MO-A3Cs) architecture. The proposed architecture aims to optimize SE and EE trade-offs in massive MIMO-assisted multi-cell networks. Furthermore, we also propose a Bayesian rule-based preference weight updating mechanism, multi-objective advantage function, and balanced-reward aggregation method to effectively train and avoid biased objective reward during the training process of the proposed model. Extensive simulations depict that the proposed model is better capable of dealing with the joint optimization of SE and EE in dynamic changing scenarios. Compared to the existing benchmarks such as Pareto front approximation-based multi-objective, reinforcement learning-based single objective, and iterative methods, the proposed approach provides a better SE-EE trade-off by achieving a higher EE in multi-cell massive MIMO networks.
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- 2024
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27. DEVELOPMENT AND ANALYSIS OF A CONCEPTUAL MODEL OF BIOMETRIC INFORMATION FROM THE POINT OF VIEW OF THE EXISTING LEGISLATIVE AND REGULATORY FRAMEWORKS
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Shurugin, Sergei V., primary, Matveev, Arif U., additional, and Gritskevich, Evgeny V., additional
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- 2021
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28. Biogenic metal nanoparticles as a potential class of antileishmanial agents: mechanisms and molecular targets
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Arif U Khan, Aftab Ahmad, Kamran Tahir, Sadeeq Ullah, Fatima Syed, and Qipeng Yuan
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Leishmania ,biology ,Chemistry ,Biomedical Engineering ,Antiprotozoal Agents ,Medicine (miscellaneous) ,Metal Nanoparticles ,Bioengineering ,Nanotechnology ,Development ,biology.organism_classification ,Molecular targets ,ANTILEISHMANIAL DRUGS ,Humans ,General Materials Science ,Metal nanoparticles ,Leishmaniasis - Abstract
Leishmaniasis, a category 1 disease, has remained neglected for decades, and therefore, has developed into a severe health problem worldwide. Unfortunately, the available antileishmanial drugs are limited, and the parasites have shown an inevitable resistance toward most of these drugs. All these factors pose a barrier to control the parasite at present. Hence, new strategies are needed to develop more effective and less toxic nanomedicines that could treat and manage the Leishmania parasite. One of these effective strategies is to construct nanometals with biologically active molecules that could possess dynamic antileishmanial activities with desirable biocompatibility. In this review paper, antileishmanial potencies of different metal nanoparticles, with particular emphasis on biogenic metal nanoparticles from 2011 to 2019, are summarized. The mechanisms by which metal-based nanomedicines kill Leishmania are also discussed.
- Published
- 2020
29. Fruit Quality Monitoring with Smart Packaging
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Alam, Arif U., primary, Rathi, Pranali, additional, Beshai, Heba, additional, Sarabha, Gursimran K., additional, and Deen, M. Jamal, additional
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- 2021
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30. Advanced biomechanical analytics: Wearable technologies for precision health monitoring in sports performance
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Abdullah Alzahrani and Arif Ullah
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Computer applications to medicine. Medical informatics ,R858-859.7 - Abstract
Objective This study investigated the impact of wearable technologies, particularly advanced biomechanical analytics and machine learning, on sports performance monitoring and intervention strategies within the realm of physiotherapy. The primary aims were to evaluate key performance metrics, individual athlete variations and the efficacy of machine learning-driven adaptive interventions. Methods The research employed an observational cross-sectional design, focusing on the collection and analysis of real-world biomechanical data from athletes engaged in sports physiotherapy. A representative sample of athletes from Bahawalpur participated, utilizing Dring Stadium as the primary data collection venue. Wearable devices, including inertial sensors (MPU6050, MPU9250), electromyography (EMG) sensors (MyoWare Muscle Sensor), pressure sensors (FlexiForce sensor) and haptic feedback sensors, were strategically chosen for their ability to capture diverse biomechanical parameters. Results Key performance metrics, such as heart rate (mean: 76.5 bpm, SD: 3.2, min: 72, max: 80), joint angles (mean: 112.3 degrees, SD: 6.8, min: 105, max: 120), muscle activation (mean: 43.2%, SD: 4.5, min: 38, max: 48) and stress and strain features (mean: [112.3 ], SD: [6.5 ]), were analyzed and presented in summary tables. Individual athlete analyses highlighted variations in performance metrics, emphasizing the need for personalized monitoring and intervention strategies. The impact of wearable technologies on athletic performance was quantified through a comparison of metrics recorded with and without sensors. Results consistently demonstrated improvements in monitored parameters, affirming the significance of wearable technologies. Conclusions The study suggests that wearable technologies, when combined with advanced biomechanical analytics and machine learning, can enhance athletic performance in sports physiotherapy. Real-time monitoring allows for precise intervention adjustments, demonstrating the potential of machine learning-driven adaptive interventions.
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- 2024
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31. Complex cilia-generated flow of hybrid nanofluid with electroosmosis, viscous dissipation and slippage
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Adil Ihsan, Aamir Ali, and Arif Ullah Khan
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Electroosmotic flow ,Complex cilia ,Hybrid nanofluid ,Viscous dissipation ,Slip effects ,Heat ,QC251-338.5 - Abstract
In this study, we investigated how electroosmsis, viscous dissipation, and slippage affect the peristaltic flow of complex cilia-generated flow of hybrid nanofluid in a ciliated tube. The complex cilia-generated flow is characterized by a complex sinusoidal wave that transmits along the wall of the tube with a uniform speed having distinct amplitudes. The main objective of this work is to examine how this complex cilia on the wall drives the hybrid nanofluid flow under electroosmosis. The Helmholtz–Smoluchowski equation is used to model the electroosmosis, and the Poisson equation is solved analytically using the Debye-Huckel approximation. The lubrication approach is utilized to simplify the governing equations. The governing non-dimensional equations for hybrid nanofluid are solved exactly using the DSolve command of Mathematica. The results are presented graphically to accomplish the theoretical results from the complex-cilia wave evolution from the necessary flow parameters in an asymmetric tube. The study shows that increasing the electroosmotic parameter leads to an increase in the velocity profile at the boundary and a decrease in the middle of the tube. Conversely, the Helmholtz–Smoluchowski velocity parameter has the opposite effect. The Brinkman parameter increases the temperature of the hybrid nanofluid. The study also presents a graphical analysis of pressure rise and pressure gradient for various values of the parameters. The pressure rise against volumetric flow is rate and pressure gradient increases by increasing the electroosmotic parameter and Helmholtz-Smoluchowski parameter, while it decreases for increasing the velocity slip parameter. The streamlines are drawn to study the trapping phenomena of blood in the hybrid nanofluid flow in an asymmetric tube by the formation of bolus and the division of streamlines. It is observed that the size and number of bolus close to the artery walls increases for electroosmotic parameter while reverse behavior is observed for Helmholtz-Smoluchowski parameter. The tabular presentation of the heat transfer coefficient at the wall is presented. The current results can be used in bio mathematical models to control fluid flow through micro-channels and to investigate ways to cure artery blockages and cancer tumors in biomedicine. The study can also be used to design and optimize microfluidic devices for drug delivery, lab-on-a-chip devices, and other biomedical applications.
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- 2024
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32. The role of random forest and Markov chain models in understanding metropolitan urban growth trajectory
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Muhammad Tariq Badshah, Khadim Hussain, Arif Ur Rehman, Kaleem Mehmood, Bilal Muhammad, Rinto Wiarta, Rato Firdaus Silamon, Muhammad Anas Khan, and Jinghui Meng
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LULC ,random forest ,Markov chain model ,Islamabad ,land change modeler ,Forestry ,SD1-669.5 ,Environmental sciences ,GE1-350 - Abstract
IntroductionThis study delves into the spatiotemporal dynamics of land use and land cover (LULC) in a Metropolitan area over three decades (1991–2021) and extends its scope to forecast future scenarios from 2031 to 2051. The intent is to aid sustainable land management and urban planning by enabling precise predictions of urban growth, leveraging the integration of remote sensing, GIS data, and observations from Landsat satellites 5, 7, and 8.MethodsThe research employed a machine learning-based approach, specifically utilizing the random forest (RF) algorithm, for LULC classification. Advanced modeling techniques, including CA–Markov chains and the Land Change Modeler (LCM), were harnessed to project future LULC alterations, which facilitated the development of transition probability matrices among different LULC classes.ResultsThe investigation uncovered significant shifts in LULC, influenced largely by socio-economic factors. Notably, vegetation cover decreased substantially from 49.21% to 25.81%, while forest cover saw an increase from 31.89% to 40.05%. Urban areas expanded significantly, from 7.55% to 25.59% of the total area, translating into an increase from 76.31 km2 in 1991 to 258.61 km2 in 2021. Forest area also expanded from 322.25 km2 to 409.21 km2. Projections indicate a further decline in vegetation cover and an increase in built-up areas to 371.44 km2 by 2051, with a decrease in forest cover compared to its 2021 levels. The predictive accuracy of the model was confirmed with an overall accuracy exceeding 90% and a kappa coefficient around 0.88.DiscussionThe findings underscore the model’s reliability and provide a significant theoretical framework that integrates socio-economic development with environmental conservation. The results emphasize the need for a balanced approach towards urban growth in the Islamabad metropolitan area, underlining the essential equilibrium between development and conservation for future urban planning and management. This study underscores the importance of using advanced predictive models in guiding sustainable urban development strategies.
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- 2024
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33. Biogenic metal nanoparticles as a potential class of antileishmanial agents: mechanisms and molecular targets
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Ahmad, Aftab, primary, Ullah, Sadeeq, additional, Syed, Fatima, additional, Tahir, Kamran, additional, Khan, Arif U, additional, and Yuan, Qipeng, additional
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- 2020
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34. Bisphenol A Electrochemical Sensor Using Graphene Oxide and β-Cyclodextrin-Functionalized Multi-Walled Carbon Nanotubes
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Alam, Arif U., primary and Deen, M. Jamal, additional
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- 2020
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35. Fully Integrated, Simple, and Low-Cost Electrochemical Sensor Array for in Situ Water Quality Monitoring
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Alam, Arif U., primary, Clyne, Dennis, additional, Jin, Hao, additional, Hu, Nan-Xing, additional, and Deen, M. Jamal, additional
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- 2020
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36. Machine learning framework for precise localization of bleached corals using bag-of-hybrid visual feature classification
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Fawad, Iftikhar Ahmad, Arif Ullah, and Wooyeol Choi
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Medicine ,Science - Abstract
Abstract Corals are sessile invertebrates living underwater in colorful structures known as reefs. Unfortunately, coral’s temperature sensitivity is causing color bleaching, which hosts organisms that are crucial and consequently affect marine pharmacognosy. To address this problem, many researchers are developing cures and treatment procedures to restore bleached corals. However, before the cure, the researchers need to precisely localize the bleached corals in the Great Barrier Reef. The researchers have developed various visual classification frameworks to localize bleached corals. However, the performance of those techniques degrades with variations in illumination, orientation, scale, and view angle. In this paper, we develop highly noise-robust and invariant robust localization using bag-of-hybrid visual features (RL-BoHVF) for bleached corals by employing the AlexNet DNN and ColorTexture handcrafted by raw features. It is observed that the overall dimension is reduced by using the bag-of-feature method while achieving a classification accuracy of 96.20% on the balanced dataset collected from the Great Barrier Reef of Australia. Furthermore, the localization performance of the proposed model was evaluated on 342 images, which include both train and test segments. The model achieved superior performance compared to other standalone and hybrid DNN and handcrafted models reported in the literature.
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- 2023
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37. Genome wide identification, structural characterization and phylogenetic analysis of High-Affinity potassium (HAK) ion transporters in common bean (Phaseolus vulgaris L.)
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Afrasyab Khan, Zamarud Shah, Sajid Ali, Nisar Ahmad, Maaz Iqbal, Arif Ullah, and Firdous Ayub
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Common bean ,HAKs ,Drought stress ,Genome wide analysis ,Expression analysis ,Evolutionary analysis ,Genetics ,QH426-470 - Abstract
Abstract Background High-Affinity Potassium ions represent one of the most important and large group of potassium transporters. Although HAK genes have been studied in a variety of plant species, yet, remain unexplored in common bean. Results In the current study, 20 HAK genes were identified in common bean genome. Super-family “K_trans” domain was found in all PvHAK genes. Signals for localization of PvHAK proteins were detected in cell membrane. Fifty three HAKs genes, across diverse plant species, were divided into 5 groups based on sequential homology. Twelve pairs of orthologs genes were found in various plant species. PvHAKs genes were distributed unequally on 7 chromosomes with maximum number (7) mapped on chromosome 2 while only 1 PvHAK found on each chromosome 1, 4, and 6. Tandem gene duplication was witnessed in 2 paralog pairs while 1 pair exhibited segmental gene duplication. Five groups were made in PvHAK gene family based on Phylogeny. Maximum PvHAKs (10) were detected in Group-V while group-II composed of only 1 PvHAK gene. Variation was witnessed in number and size of motifs, and structure of PvHAKs associated with different groups. Light and hormone responsive elements contributed 57 and 24% share, respectively, to cis regulatory elements. qRT-PCR based results revealed significant increase in expression of all 4 PvHAK genes under low-potassium stress. Conclusion The current study provides valuable information for further functional characterization and uncovering the molecular mechanism associated with Potassium transportation in plants.
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- 2023
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38. Non-Invasive Multi-Gas Detection Enabled by Cu-CuO/PEDOT Microneedle Sensor
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Arif Ullah Khan, Muhammad Tahir, Fazal Ul Nisa, Mizna Naseem, Iqra Shahbaz, Zeyu Ma, Zilu Hu, Abdul Jabbar Khan, Muhammad Sabir, and Liang He
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vapor-phase polymerization ,non-invasive sensing ,environmental monitoring ,PEDOT ,volatile organic compound ,Chemical technology ,TP1-1185 - Abstract
Metal-oxide-based gas sensors are extensively utilized across various domains due to their cost-effectiveness, facile fabrication, and compatibility with microelectronic technologies. The copper (Cu)-based multifunctional polymer-enhanced sensor (CuMPES) represents a notably tailored design for non-invasive environmental monitoring, particularly for detecting diverse gases with a low concentration. In this investigation, the Cu-CuO/PEDOT nanocomposite was synthesized via a straightforward chemical oxidation and vapor-phase polymerization. Comprehensive characterizations employing X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), X-ray diffraction (XRD), and micro Raman elucidated the composition, morphology, and crystal structure of this nanocomposite. Gas-sensing assessments of this CuMPES based on Cu-CuO/PEDOT revealed that the response current of the microneedle-type CuMPES surpassed that of the pure Cu microsensor by nearly threefold. The electrical conductivity and surface reactivity are enhanced by poly (3,4-ethylenedioxythiophene) (PEDOT) polymerized on the CuO-coated surface, resulting in an enhanced sensor performance with an ultra-fast response/recovery of 0.3/0.5 s.
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- 2024
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39. Direct bonding of copper and liquid crystal polymer
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Redhwan, Taufique Z., Alam, Arif U., Catalano, Massimo, Wang, Luhua, Kim, Moon J., Haddara, Yaser M., and Howlader, Matiar M.R.
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- 2018
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40. Neuroprotective potential of Mentha piperita extract prevents motor dysfunctions in mouse model of Parkinson's disease through anti-oxidant capacities.
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Rabia Anjum, Chand Raza, Mehwish Faheem, Arif Ullah, and Maham Chaudhry
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Medicine ,Science - Abstract
Parkinson's disease (PD) is the second most common neurodegenerative disease in the world. Neurodegeneration of the substantia nigra (SN) and diminished release of dopamine are prominent causes of this progressive disease. The current study aims to evaluate the protective potential of ethanolic extract of Mentha piperita (EthMP) against rotenone-mediated PD features, dopaminergic neuronal degeneration, oxidative stress and neuronal survival in a mouse model. Swiss albino male mice were assigned to five groups: control (2.5% DMSO vehicle), PD (rotenone 2.5 mg/kg), EthMP and rotenone (200mg/kg and 2.5mg/kg, respectively), EthMP (200 mg/kg), and Sinemet, reference treatment containing levodopa and carbidopa (20 mg/kg and rotenone 2.5mg/kg). Behavioral tests for motor functional deficit analysis were performed. Anti-oxidant capacity was estimated using standard antioxidant markers. Histopathology of the mid-brain for neurodegeneration estimation was performed. HPLC based dopamine level analysis and modulation of gene expression using quantitative real-time polymerase chain reaction was performed for the selected genes. EthMP administration significantly prevented the rotenone-mediated motor dysfunctions compared to PD group as assessed through open field, beam walk, pole climb down, stepping, tail suspension, and stride length tests. EthMP administration modulated the lipid peroxidation (LPO), reduced glutathione (GSH), and superoxide dismutase (SOD) levels, as well as glutathione-s-transferase (GST) and catalase (CAT) activities in mouse brain. EthMP extract prevented neurodegeneration in the SN of mice and partially maintained dopamine levels. The expression of genes related to dopamine, anti-oxidant potential and synapses were modulated in M. piperita (MP) extract treated mice brains. Current data suggest therapeutic capacities of MP extract and neuroprotective capacities, possibly through antioxidant capacities. Therefore, it may have potential clinical applications for PD management.
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- 2024
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41. Flexible Sensors – Materials, Interfaces and Surfaces
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Deen, M Jamal, primary and Alam, Arif U., additional
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- 2019
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42. Sweat Glucose Sensing by Directly Bonded Thin Films
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Alam, Maksud M., primary, Alam, Arif U., additional, and Howlader, Matiar M. R., additional
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- 2019
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43. Digital entrepreneurial acceptance: an examination of technology acceptance model and do-it-yourself behavior
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Muhammad Ilyas, Arif ud din, Muhammad Haleem, and Irshad Ahmad
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Digital entrepreneurship ,Do-it-yourself ,Technology acceptance model ,Small and medium-sized enterprises ,Business ,HF5001-6182 ,Commercial geography. Economic geography ,HF1021-1027 - Abstract
Abstract The study extended the existing literature on digital entrepreneurship, do-it-yourself and technology acceptance models with the help of empirical data. It further aimed to identify the factors associated with the e-entrepreneurial acceptance by examining the integration of do-it-yourself and technology acceptance models. A data sample consisting of 200 questionnaires were collected from small–medium enterprise using the digital platforms for their business activities. Structural equation modeling was applied for testing the association of the models. A robust theoretical framework adopted to validate to use digital entrepreneurship as a standalone or along with the traditional entrepreneurial. The study was only limited to the small–medium enterprises working in the context of Pakistan. A total of 200 respondents were visited to collect the data using convenience sampling technique. The findings of this study concluded that all the variables of technology acceptance model are significantly related to the digital entrepreneurial acceptance. Similarly, factors associated with do-it-yourself behavior had a substantial influence, with the exception of perceived lack of product quality as well as perceived lack of product availability variables, which had no significant impact on digital entrepreneurial acceptance.
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- 2023
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44. Unleashing the Potential of a Hybrid 3D Hydrodynamic Monte Carlo Risk Model for Maritime Structures’ Design in the Imminent Climate Change Era
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Arif Uğurlu, Egemen Ander Balas, Can Elmar Balas, and Sami Oğuzhan Akbaş
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climate change impacts ,wave climate variability ,disruptive effects of lake level changes ,future changes in wave climate ,Hydrotam-3D ,Naval architecture. Shipbuilding. Marine engineering ,VM1-989 ,Oceanography ,GC1-1581 - Abstract
Submarine pipelines have become integral for transporting resources and drinking water across large bodies. Therefore, ensuring the stability and reliability of these submarine pipelines is crucial. Incorporating climate change impacts into the design of marine structures is paramount to assure their lifetime safety and serviceability. Deterministic design methods may not fully consider the uncertainties and risks related to climate change compared to risk-based design models. The latter approach considers the future risks and uncertainties linked to climate and environmental changes, thus ensuring infrastructure sustainability. This study pioneers a Hybrid 3D Hydrodynamic Monte Carlo Simulation (HMCS) Model to improve the reliability-based design of submarine pipelines, incorporating the effects of climate change. Current design approaches may follow deterministic methods, which may not systematically account for climate change’s comprehensive uncertainties and risks. Similarly, traditional design codes often follow a deterministic approach, lacking in the comprehensive integration of dynamic environmental factors such as wind, waves, currents, and geotechnical conditions, and may not adequately handle the uncertainties, including the long-term effects of climate change. Nowadays, most countries are developing new design codes to modify the risk levels for climate change’s effects, such as sea-level rises, changes in precipitation, or changes in the frequency/intensity of winds/storms/waves in coastal and marine designs. Our model may help these efforts by integrating a comprehensive risk-based approach, utilizing a 3D hydrodynamic model to correlate diverse environmental factors through Monte Carlo Simulations (MCS). The hybrid model can promise the sustainability of marine infrastructure by adapting to future environmental changes and uncertainties. Including such advanced methodologies in the design, codes are encouraged to reinforce the resilience of maritime structures in the climate change era. The present design codes should inevitably be reviewed according to climate change effects, and the hybrid risk-based design model proposed in this research should be included in codes to ensure the reliability of maritime structures. The HMCS model represents a significant advancement over existing risk models by incorporating comprehensive environmental factors, utilizing advanced simulation techniques, and explicitly addressing the impacts of climate change. This innovative approach ensures the development of more resilient and sustainable maritime infrastructure capable of withstanding future environmental uncertainties.
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- 2024
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45. Pre-Trained Model-Based NFR Classification: Overcoming Limited Data Challenges
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Kiramat Rahman, Anwar Ghani, Abdulrahman Alzahrani, Muhammad Usman Tariq, and Arif Ur Rahman
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Software engineering ,requirements engineering ,NFR classifications ,pre-trained model ,machine learning ,natural language processing ,Electrical engineering. Electronics. Nuclear engineering ,TK1-9971 - Abstract
Machine learning techniques have shown promising results in classifying non-functional requirements (NFR). However, the lack of annotated training data in the domain of requirement engineering poses challenges to the accuracy, generalization, and reliability of ML-based methods, including overfitting, poor performance, biased models, and out-of-vocabulary issues. This study presents an approach for the classification of NFR in software requirements specification documents by extracting features from word embedding pre-trained models. The novel algorithms are specifically designed to extract relevant representative features from pre-trained word embedding models. In addition, each pre-trained model is paired with the four tailored neural network architectures for NFR classification including RPCNN, RPBiLSTM, RPLSTM, and RPANN. This combination results in the creation of twelve unique models, each with its unique configuration and characteristics. The results show that the integration of pre-trained GloVe models with RPBiLSTM demonstrates the highest performance, achieving an impressive average Area Under the Curve (AUC) score of 96%, a precision of 85%, and recall of 82%, highlighting its strong ability to accurately classify NFRs. Furthermore, among the integration of pre-trained Word2Vec models, RPLSTM achieved notable results, with an AUC score of 95%, precision of 86%, and recall of 80%. Similarly, integrated fastText-based pre-trained models the RPBiLSTM yield competitive performance, with an AUC score of 95%, precision of 85%, and recall of 80%. This comprehensive and integrated approach provides a practical solution for effectively analyzing and classifying NFR, thereby facilitating improved software development practices.
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- 2023
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46. Freshness Monitoring of Packaged Vegetables.
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Beshai, Heba, Sarabha, Gursimran K., Rathi, Pranali, Alam, Arif U., and Deen, M. Jamal
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FOOD packaging ,VEGETABLES ,PACKAGED foods ,INTELLIGENT sensors ,PRODUCE markets ,PACKAGING industry ,VEGETABLE farming - Abstract
Smart packaging is an emerging technology that has a great potential in solving conventional food packaging problems and in meeting the evolving packaged vegetables market needs. The advantages of using such a system lies in extending the shelf life of products, ensuring the safety and the compliance of these packages while reducing the food waste; hence, lessening the negative environmental impacts. Many new concepts were developed to serve this purpose, especially in the meat and fish industry with less focus on fruits and vegetables. However, making use of these evolving technologies in packaging of vegetables will yield in many positive outcomes. In this review, we discuss the new technologies and approaches used, or have the potential to be used, in smart packaging of vegetables. We describe the technical aspects and the commercial applications of the techniques used to monitor the quality and the freshness of vegetables. Factors affecting the freshness and the spoilage of vegetables are summarized. Then, some of the technologies used in smart packaging such as sensors, indicators, and data carriers that are integrated with sensors, to monitor and provide a dynamic output about the quality and safety of the packaged produce are discussed. Comparison between various intelligent systems is provided followed by a brief review of active packaging systems. Finally, challenges, legal aspects, and limitations facing this smart packaging industry are discussed together with outlook and future improvements. [ABSTRACT FROM AUTHOR]
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- 2020
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47. Promoting Collaborative Construction Process Management by Means of a Normalized Workload Approach
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Schimanski, Christoph P., primary, Marcher, Carmen, additional, Dallasega, Patrick, additional, Marengo, Elisa, additional, Follini, Camilla, additional, Rahman, Arif U., additional, Revolti, Andrea, additional, Nutt, Werner, additional, and Matt, Dominik T., additional
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- 2018
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48. PPARγ activation mitigates glucocorticoid receptor‐induced excessive lipolysis in adipocytes via homeostatic crosstalk
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Hasan, Arif U., primary, Ohmori, Koji, additional, Hashimoto, Takeshi, additional, Kamitori, Kazuyo, additional, Yamaguchi, Fuminori, additional, Rahman, Asadur, additional, Tokuda, Masaaki, additional, and Kobori, Hiroyuki, additional
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- 2018
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49. Copper and liquid crystal polymer bonding towards lead sensing
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Redhwan, Taufique Z., primary, Alam, Arif U., additional, Haddara, Yaser M., additional, and Howlader, Matiar M. R., additional
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- 2018
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50. Atrophic Dermatofibrosarcoma Protuberans with Eosinophilic Infiltration
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Anber Mahboob, Claire Turgeon, Syeda Qasim, and Arif Usmani
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dermatofibrosarcoma protuberans ,atrophy ,eosinophilia ,Dermatology ,RL1-803 - Abstract
Dermatofibrosarcoma protuberans (DFSP) is a rare, locally aggressive spindle cell mesenchymal tumor arising in the dermis, with low metastatic potential. The most commonly affected sites are the trunk and proximal extremities; rarely are acral sites involved. Atrophic DFSP is a rare form of DFSP, that is morphologically different but histologically similar to DFSP. It commonly affects young adults between the ages of 20 to 50 years. The current management strategy for atrophic DFSP is surgical excision with long-term follow-up to detect any recurrence. Only one known case of atrophic DFSP with eosinophilic infiltration is what makes our case an exceptionally rare presentation.
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- 2022
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