846 results on '"Abubakar, A"'
Search Results
2. Image-based awareness campaign and community mobilization in the control of schistosomiasis
- Author
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Makau-Barasa, Louise, Assefa, Liya, Aderogba, Moses O, Bell, David, Solomon, Jacob, Abba, Abubakar, A-Enegela, Juliana, Damen, James G, Popoola, Samuel, Diehl, Jan-Carel, Vdovine, Gleb, and Agbana, Temitope
- Published
- 2023
3. Treatments and predictors of mortality for carbapenem-resistant gram-negative Bacilli infections in Malaysia: A retrospective cohort study
- Author
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Abubakar, Usman, Zulkarnain, Amni Izzati, Rodriguez-Bano, Jesus, Kamarudin, Norhidayah, Elrggal, Mahmoud E, Elnaem, Mohamed Hassan, and Harun, Sabariah Noor
- Published
- 2022
4. Enhancing Galantamine Distribution in Rat Brain Using Microplasma-Assisted Nose-to-Brain Drug Delivery.
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Sadiq, Abubakar Hamza, Alam, Md Jahangir, Begum, Farhana, Hasan, Mahedi, Kristof, Jaroslav, Mamun, Md. Al, Maniruzzaman, Md., Shimizu, Kosuke, Kanazawa, Takanori, Kahyo, Tomoaki, Setou, Mitsutoshi, and Shimizu, Kazuo
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CEREBRAL dominance , *ALZHEIMER'S disease , *NON-thermal plasmas , *PLASMA flow , *NASAL cavity , *MATRIX-assisted laser desorption-ionization - Abstract
Nose-to-brain (N2B) drug delivery is a promising technique for the treatment of brain diseases. It allows a drug to enter the brain without passing through the blood–brain barrier. However, the nasal cavity and nasal mucosa can restrict the amount of drug absorbed. Recent studies of non-thermal plasma (NTP) have shown improvement in in vitro drug delivery to cells and tissues. However, whether NTP treatments can enhance the in vivo delivery of drugs for neurodegenerative disease like Alzheimer's disease (AD) into the brain via the N2B technique remains unclear. The drug used in this study was galantamine hydrobromide. Galantamine is used to treat patients with mild to moderate AD. Based on the principle of NTP, a type of dielectric barrier discharge (DBD) plasma, which we called spiral DBD microplasma, was designed. It was inserted into the nose of a rat to a depth of 2 mm. The spiral DBD microplasma was driven by a sinusoidal voltage for 4 min, followed by the immediate administration of galantamine. The effect of the microplasma treatment on the distribution of galantamine in the brain was evaluated using matrix-assisted laser desorption/ionization-imaging mass spectrometry (MALDI-IMS). The results showed a high distribution of galantamine in the left and right brain hemispheres of the rat treated with plasma discharge compared to a control treated without plasma discharge. The spiral DBD microplasma is a novel contribution to DBD plasma designs. In addition, this technique for drug delivery has also created a novel approach with potential for becoming a non-invasive method of enhancing drug distribution in the brain for the treatment of neurological disorders. [ABSTRACT FROM AUTHOR]
- Published
- 2025
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5. Sustainable Insulating Materials for High-Voltage Equipment: Dielectric Properties of Green Synthesis-Based Nanofluids from Vegetable Oils.
- Author
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Siddique, Abubakar, Shahid, Muhammad Usama, Aslam, Waseem, Atiq, Shahid, Altimania, Mohammad R., Munir, Hafiz Mudassir, Zaitsev, Ievgen, and Kuchanskyy, Vladislav
- Abstract
This study aimed to develop a cost-effective, environmentally sustainable, and technologically advanced dielectric fluid by utilizing the beneficial properties of natural ester-based vegetable oils, offering a promising alternative for transformer insulation and cooling applications. The novelty of this research lies in the formulation of a nanofluid that combines three distinct vegetable oils—castor, flaxseed, and blackseed—creating a unique base fluid. SiO
2 nanoparticles were incorporated into the fluid to leverage their multiple advantageous characteristics. Extensive experiments were conducted to evaluate the superior properties of the proposed nanofluid, focusing on key dielectric properties, such as relative permittivity (εr ) and the dielectric dissipation factor (tan δ). Comparative analyses with conventional mineral oil, which was used as a benchmark, demonstrated the significant advantages of the vegetable oil-based nanofluid. The novel formulation outperformed all other tested samples, highlighting its exceptional performance. Additionally, three preparation methods were examined, with the green synthesis technique producing the nanofluid with better dielectric properties. Through a detailed presentation of empirical data and compelling arguments, this study confirms the potential of natural ester-based vegetable oil nanofluids as a highly promising alternative, driven by their intrinsic properties and the environmentally friendly synthesis method employed. [ABSTRACT FROM AUTHOR]- Published
- 2025
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6. Control Strategy of a Rotating Power Flow Controller Based on an Improved Hybrid Particle Swarm Optimization Algorithm.
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Zhang, Ziyang, Jia, Jiaoxin, Aslam, Waseem, Siddique, Abubakar, and Albogamy, Fahad R.
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RENEWABLE energy sources ,OPTIMIZATION algorithms ,ELECTRICAL load ,REACTIVE flow ,ELECTRIC lines ,PARTICLE swarm optimization - Abstract
As the proportion of renewable energy sources integrated into the power grid increases, it imposes significant volatility on the grid, leading to uneven load distribution across certain transmission lines. Rotating Power Flow Controllers (RPFCs) based on Rotating Phase-Shifting Transformers (RPSTs) offer a viable solution to such issues in lines rated at 10 kV and below. This paper begins with a brief introduction to RPFCs, followed by the modeling of their topology for a single-circuit line and the derivation of active and reactive power flow formulas. Notably, this paper introduces intelligent optimization algorithms to this field for the first time, employing an improved hybrid particle swarm optimization (HPSO) algorithm to control the active power while keeping the reactive power constant and subsequently adjusting the reactive power while maintaining the active power steady, thereby achieving power regulation. Using Matlab/Simulink simulations, this strategy was compared with adaptive adjustment strategies, verifying that it exhibits reduced power fluctuations and overshoots during the adjustment process, thus confirming the effectiveness of the adjustment scheme. By leveraging this algorithm in conjunction with simulations, a Q-P operating range diagram for transmission lines was plotted, determining the adjustable range of actual power. [ABSTRACT FROM AUTHOR]
- Published
- 2025
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7. Effect of Induced Polyploidy on Morphology, Antioxidant Activity, and Dissolved Sugars in Allium cepa L.
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Abubakar, Mujahid Ado, Gennadievna, Novitskaya Elena, Mikhailovna, Son Oksana, and Mikhailovna, Kim Ekaterina
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PLANT breeding ,CHROMOSOME duplication ,REFRACTIVE index ,POLYPLOIDY ,SURVIVAL rate - Abstract
The role of onion as the second most-consumed and cultivated vegetable around the world and its renowned qualities that lead it to be called the "queen of the kitchen" have positioned it as a vital source of nutritional and economic contributions around the world. Polyploidy serves as a groundbreaking innovation in plant breeding, improving the yield and vigor of plants. This study was conducted to determine the effects of applying different concentrations of colchicine to onion seedlings on their morphology, antioxidant activity, and dissolved sugars. The mutagen was applied to the onion seeds at three different concentrations (0.05, 0.1, and 0.2% w/v) for an exposure period of 24 h. A chromosomal analysis confirmed the induction of polyploidy, which led to the successful duplication of the chromosome number from diploid (2n = 16) to tetraploid (4n = 32). The control recorded a survival rate of 91.57%, while 83.33%, 3.33%, and 0.00% survival rates were recorded for seedlings treated with 0.05%, 0.1%, and 0.2% (w/v) concentrations of colchicine, respectively. Furthermore, the tetraploids showed significant differences in morphology, producing the tallest seedlings (reaching up to 73.6 cm tall) and the greatest average bulb diameter (of 5.64 cm) after 14 weeks. The tetraploids also showed significant differences in antioxidant activity and the amount of dissolved sugars, recording the highest DPPH scavenging percentage of 72.58% and refractive index of 1.369. Successful induction of polyploidy was achieved with the application of 0.05% (w/v) colchicine, which produced tetraploids that are morphologically and biochemically superior to other treated and control plants at a significance level of p < 0.05. [ABSTRACT FROM AUTHOR]
- Published
- 2025
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8. Survey of Artificial Intelligence Model Marketplace.
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Qian, Mian, Musa, Abubakar Ahmad, Biswas, Milon, Guo, Yifan, Liao, Weixian, and Yu, Wei
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ARTIFICIAL intelligence ,MACHINE learning ,CRITICAL currents ,MARKETPLACES ,BROKERS - Abstract
The rapid advancement and widespread adoption of artificial intelligence (AI) across diverse industries, including healthcare, finance, manufacturing, and retail, underscore the transformative potential of AI technologies. This necessitates the development of viable AI model marketplaces that facilitate the development, trading, and sharing of AI models across the pervasive industrial domains to harness and streamline their daily activities. These marketplaces act as centralized hubs, enabling stakeholders such as developers, data owners, brokers, and buyers to collaborate and exchange resources seamlessly. However, existing AI marketplaces often fail to address the demands of modern and next-generation application domains. Limitations in pricing models, standardization, and transparency hinder their efficiency, leading to a lack of scalability and user adoption. This paper aims to target researchers, industry professionals, and policymakers involved in AI development and deployment, providing actionable insights for designing robust, secure, and transparent AI marketplaces. By examining the evolving landscape of AI marketplaces, this paper identifies critical gaps in current practices, such as inadequate pricing schemes, insufficient standardization, and fragmented policy enforcement mechanisms. It further explores the AI model life-cycle, highlighting pricing, trading, tracking, security, and compliance challenges. This detailed analysis is intended for an audience with a foundational understanding of AI systems, marketplaces, and their operational ecosystems. The findings aim to inform stakeholders about the pressing need for innovation and customization in AI marketplaces while emphasizing the importance of balancing efficiency, security, and trust. This paper serves as a blueprint for the development of next-generation AI marketplaces that meet the demands of both current and future application domains, ensuring sustainable growth and widespread adoption. [ABSTRACT FROM AUTHOR]
- Published
- 2025
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9. Exploring the Potential Effects of Soybean By-Product (Hulls) and Enzyme (Beta-Mannanase) on Laying Hens During Peak Production.
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Shuaib, Muhammad, Hafeez, Abdul, Paneru, Deependra, Kim, Woo Kyun, Tahir, Muhammad, Pokoo-Aikins, Anthony, Ullah, Obaid, and Sufyan, Abubakar
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EGG quality ,HENS ,BLOOD cholesterol ,LDL cholesterol ,SURFACE area - Abstract
Simple Summary: This study investigated the effect of soybean hulls (SHs) and enzymes (β-mannanase) on the egg quality, serum biochemistry, nutrient digestibility, digesta viscosity, feces consistency, and intestinal histomorphology of golden-brown laying hens during peak production. Different diets containing different levels of SHs and enzymes were fed to the birds for four weeks, and the results showed a significantly improved gut villus width, height, crypt depth, and surface area in the 3% SH and 0.03 g/kg enzyme group than in the remaining groups. This combination also enhanced the dry matter, crude protein, crude fiber, and crude fat digestibility and reduced total cholesterol and LDL levels. Egg quality, digesta viscosity, and feces consistency were not affected. Overall, adding 3% of SHs and 0.03 g/kg of enzymes (β-mannanase) to the feed may help enhance laying hens' gut health and nutrient digestibility, lowering cholesterol and LDL levels without affecting the egg quality indices. This study determined the interaction between soybean hulls (SHs) and enzymes (β-mannanase) to improve the sustainability and efficacy of feeding programs for laying hens during peak production while ensuring the best health and efficiency. In a completely randomized design (CRD), 200 golden-brown hens were fed for four weeks (33 to 36 weeks) and randomly distributed into four groups, each containing four replicates of ten birds, with one group receiving a control diet (P0) and the others receiving diets that contained four combinations of SHs and enzymes (ENZs). e.g., 3% SHs and 0.02 g/kg ENZs (P1), 3% SHs and 0.03 g/kg ENZs (P2), 9% SHs and 0.02 g/kg ENZs (P3), and 9% SHs and 0.03 g/kg ENZs (P4). Although most egg quality measures remained similar, the P2 group showed enhanced (p = 0.630) egg weight, albumen weight, and height. Moreover, the P2 group improved gut (p < 0.05) shape by increasing villus width, height, crypt depth, and surface area throughout intestinal sections, while the P4 group markedly improved total cholesterol and LDL (p = 0.022) levels. The P1, P2, and P4 groups exhibited a significant enhancement in dry matter (p = 0.022) and crude fiber (p = 0.046) digestibility, while the P2 group demonstrated superior crude protein digestibility (p = 0.032), and the P1 and P2 groups showed increased crude fat digestibility compared to the other groups. In conclusion, adding 3% of SHs and 30 mg/kg of ENZs (β-mannanase) to the feed may help laying hens, enhance gut health and some egg quality indices, and decrease blood cholesterol and LDL levels without compromising nutrient digestibility. [ABSTRACT FROM AUTHOR]
- Published
- 2025
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10. Thalassemia: Pathophysiology, Diagnosis, and Advances in Treatment.
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Sadiq, Idris Zubairu, Abubakar, Fatima Sadiq, Usman, Hauwa Salisu, Abdullahi, Aliyu Dantani, Ibrahim, Bashiru, Kastayal, Babangida Sanusi, Ibrahim, Maryam, and Hassan, Hassan Aliyu
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BLOOD diseases , *BONE marrow transplantation , *THERAPEUTICS , *CHELATION therapy , *IRON overload , *DELETION mutation - Abstract
Thalassemia represents a diverse group of inherited hematological disorders characterized by defective globin chain synthesis, leading to chronic anemia and associated complications. The complicated pathophysiology of beta-thalassemia involves genetic mutations or rarely deletions of the beta-globin gene on chromosome 11 whereas alpha-thalassemia involves deletions in the HBA1 and HBA2 genes or occasionally alterations to the DNA sequence in or around these genes. These mutation and deletion effects disrupt the balance of α/β-globin chain production, resulting in ineffective erythropoiesis, hemolysis, and a cascade of clinical manifestations including anemia, bone deformities, and iron overload. Advances in diagnostic techniques have enhanced our ability to detect and characterize these mutations, facilitating early and accurate diagnoses. Current management strategies encompass regular blood transfusions, the use of hydroxyurea to improve hemoglobin levels, and iron chelation therapy to prevent iron-related organ damage. Moreover, other therapeutics such as thalidomide for those not responding to hydroxyurea, Sirolimus for patients with immunodeficiencies, and use of vitamin E as an antioxidant have proven to be effective. Innovative therapies such as gene therapy and bone marrow transplantation offer promising curative potential, opening a new era in the treatment of thalassemia. This review focuses on pathophysiological mechanisms underlying thalassemia, explores the diagnostic methodologies, and highlights recent advancements in therapeutic approaches. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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11. Per- and Polyfluoroalkyl Substances (PFAS) as Emerging Obesogens: Mechanisms, Epidemiological Evidence, and Regulatory Challenges.
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Lewis, Niya, Abdulkadir, Abubakar, Kandel, Shila, Rosby, Raphyel, and Hossain, Ekhtear
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FLUOROALKYL compounds , *PEROXISOME proliferator-activated receptors , *FOOD contamination , *ENDOCRINE disruptors , *MATERNAL exposure - Abstract
The pervasive presence of per- and polyfluoroalkyl substances (PFAS) in the environment and their persistent nature raise significant concerns regarding their impact on human health. This review delves into the obesogenic potential of PFAS, shedding light on their mechanisms of action, epidemiological correlations with obesity and metabolic disorders, and the challenges faced in regulatory frameworks. PFAS, characterized by their carbon-fluorine chains, are ubiquitous in various consumer products, leading to widespread exposure through ingestion of contaminated food and water. Emerging evidence suggests that PFAS may act as endocrine-disrupting chemicals, interfering with lipid metabolism and hormone functions related to obesity. We examine in vitro, in vivo, human, and in silico studies that explore the interaction of PFAS with PPARs and other molecular targets, influencing adipogenesis and lipid homeostasis. Furthermore, the review highlights epidemiological studies investigating the association between maternal PFAS exposure and the risk of obesity in offspring, presenting mixed and inconclusive findings that underscore the complexity of PFAS effects on human health. Presently, there are major challenges in studying PFAS toxicity, including their chemical diversity and the limitations of current regulatory guidelines, potential remediation, and detoxification. This review emphasizes the need for a multidisciplinary approach, combining advanced analytical methods, in silico models, and comprehensive epidemiological studies, to unravel the obesogenic effects of PFAS and inform effective public health strategies. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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12. Enhanced Projection Method for the Solution of the System of Nonlinear Equations Under a More General Assumption than Pseudo-Monotonicity and Lipschitz Continuity.
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Muangchoo, Kanikar and Abubakar, Auwal Bala
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LIPSCHITZ continuity , *NONLINEAR equations , *NONLINEAR operators , *OPERATOR equations , *BENCHMARK problems (Computer science) - Abstract
In this manuscript, we propose an efficient algorithm for solving a class of nonlinear operator equations. The algorithm is an improved version of previously established method. The algorithm's features are as follows: (i) the search direction is bounded and satisfies the sufficient descent condition; (ii) the global convergence is achieved when the operator is continuous and satisfies a condition weaker than pseudo-monotonicity. Moreover, by comparing it with previously established method the algorithm's efficiency was shown. The comparison was based on the iteration number required for each algorithm to solve a particular problem and the time taken. Some benchmark test problems, which included monotone and pseudo-monotone problems, were considered for the experiments. Lastly, the algorithm was utilized to solve the logistic regression (prediction) model. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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13. Transnasal Brain Sampling for Human Rabies Diagnosis.
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Djimatey, Moses Barima, Abubakar, Abdul-Rahim, Sylverken, Augustina Angelina, Odoom, Theophilus, Abubakari, Braimah Baba, Ohemeng, John Akwasi, Yale, Gowri, Lohr, Frederic, Gamble, Luke, and Mahadevan, Anita
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PATIENTS' families ,CRIBRIFORM plate ,TECHNOLOGICAL innovations ,RABIES ,DIAGNOSIS methods ,DEAD ,AUTOPSY - Abstract
Introduction: Rabies remains a significant global threat, yet accurate estimations of its impact are hindered by the lack of confirmatory diagnoses. Postmortem diagnosis of rabies traditionally involves invasive brain tissue testing, a process met with resistance from deceased patients' families, impeding consent. This paper presents and evaluates an innovative yet unpublished transnasal approach for postmortem brain tissue collection, offering a minimally invasive, easier, faster, and safer method. This method preserves the cadaver's integrity, potentially easing family reluctance towards autopsies. The limited testing of both human and animal rabies in Ghana highlights the challenges in diagnosing this fatal disease. Scarce diagnostic resources and the complexity of obtaining brain tissue samples exacerbate the issue. Cultural and religious beliefs surrounding autopsies contribute to familial hesitation, as families view these procedures as disruptive and disfiguring, further complicating consent. Methodology: The transnasal technique involves approaching the brain tissue through the nostrils and cribriform plate without any superficial manipulation of the patient's head and face, thereby preserving the aesthetics and natural features of the person. Results: Technological advancements and seamless One Health collaboration among governmental, non-governmental, and research entities locally and globally have culminated in Ghana's first confirmed rabies diagnosis using this method of brain tissue collection. This success emphasizes the efficiency and feasibility of the transnasal brain collection approach and the invaluable role of the One Health approach and collaborative efforts in overcoming diagnostic challenges in rabies control. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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14. Behavior Change Techniques in Physical Activity Interventions Targeting Overweight and Obese Children and Adolescents: A Systematic Review.
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Peng, Sanying, Khairani, Ahmad Zamri, Yuan, Fang, Uba, Abubakar Rabiu, and Yang, Xiaoming
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OVERWEIGHT children ,INCENTIVE (Psychology) ,GOAL (Psychology) ,SOCIAL support ,TEENAGERS - Abstract
Substantial evidence globally confirms the benefits of physical activity (PA) interventions for the physical and mental health of overweight and obese children and adolescents. However, current research has yet to determine which behavior change techniques (BCTs) are most effective in PA interventions for this population. This systematic review aims to evaluate the application of BCTs in PA interventions for overweight and obese children and adolescents and to identify the most effective BCTs using the promise ratio. Five electronic databases (PubMed, Embase, Cochrane Central, Web of Science, and PsycINFO) were searched up to 31 May 2024, to identify intervention studies meeting the eligibility criteria for promoting PA in the target population. Thirteen studies were included (nine randomized controlled trials and four quasi-experimental studies). The quality of the included studies was assessed using a revised version of the Cochrane Risk of Bias tool and the Risk of Bias in Non-randomized Studies tool. Among the 24 BCTs implemented, the most frequently applied were goal setting (behavior), instruction on how to perform the behavior, feedback on behavior, and self-monitoring of behavior. Action planning, social support, and material incentives showed the most significant potential to promote PA. These findings provide valuable insights for designing future PA interventions for this group, with the potential to improve health outcomes and enhance PA participation among obese children and adolescents. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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15. Waste Polyethylene Terephthalate (PET) as a Partial Replacement of Aggregates in Sustainable Concrete.
- Author
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Abubakar, Lukman, Yeasmin, Nusrat, and Bhattacharjee, Arjak
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CONCRETE waste ,WASTE minimization ,COMPRESSIVE strength ,HEALTH of military personnel ,CONCRETE - Abstract
Concrete use is enhanced daily due to infrastructure development, but it has adverse impacts on the environment. Modern lifestyles have led to the increased use of plastic, and, for households, polyethylene terephthalate (PET) plastics are used. However, PET is non-biodegradable and causes adverse impacts on the environment and marine health. So, there is a need to minimize the amount of plastic waste by finding an alternative use for the waste. Our study focuses on creating sustainable concrete by utilizing PET-based plastic waste as a partial substitution for aggregates, aiming to use this concrete for various low-load-bearing construction applications. From our phase analysis study, no adverse effects were found on cement phase formation. We also found that up to 10 wt.% PET incorporation leads to acceptable compressive strength reduction as per ASTM guidelines. To enhance adhesion, the PET was roughened, and, from FESEM, we found effective adhesion of PET waste into the cement matrix. We believe that this sustainable concrete will not only contribute to waste reduction but also promote eco-friendly construction material development. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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16. An Adapted Proximal Point Algorithm Utilizing the Golden Ratio Technique for Solving Equilibrium Problems in Banach Spaces.
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Abass, Hammed Anuoluwapo, Oyewole, Olawale Kazeem, Moshokoa, Seithuti Philemon, and Adamu, Abubakar
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GOLDEN ratio ,BANACH spaces ,FUNCTION spaces ,HILBERT space ,LYAPUNOV functions - Abstract
This paper explores the iterative approximation of solutions to equilibrium problems and proposes a simple proximal point method for addressing them. We incorporate the golden ratio technique as an extrapolation method, resulting in a two-step iterative process. This method is self-adaptive and does not require any Lipschitz-type conditions for implementation. We present and prove a weak convergence theorem along with a sublinear convergence rate for our method. The results extend some previously published findings from Hilbert spaces to 2-uniformly convex Banach spaces. To demonstrate the effectiveness of the method, we provide several numerical illustrations and compare the results with those from other methods available in the literature. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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17. Impact of Influence of Piston Design Parameters on the Hydrodynamic Characteristics of Internal Combustion Engines—A Numerical Study.
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Menacer, Brahim, Narayan, Sunny, Tuninetti, Víctor, Khatir, Tawfiq, Oñate, Angelo, Osorio, Liomnis, Abubakar, Shitu, Samuel, Joseph, Grujic, Ivan, Stojanovic, Nadica, and Kaisan, Muhammad Usman
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PISTON rings ,SURFACE roughness ,GAS leakage ,FRICTION ,COMBUSTION - Abstract
Piston top rings in the combustion engine play a crucial role in the overall hydrodynamic performance of engines, such as power loss, minimum film thickness and friction forces, by ensuring sealing and minimizing the leakage of burnt gases. This present paper examines the influence of four key parameters of the top ring, such as ring width, ring temperature, ring tension, and ring surface roughness on the hydrodynamic behavior at the ring/cylinder contact. These parameters play a significant role in the formation and maintenance of the oil film, directly influencing hydrodynamic indicators such as the minimum oil film thickness, friction force, power loss, oil pressure, and the ring angle twist. This article relies on hydrodynamic models and numerical simulations performed using GT-SUITE version 6 software to analyze these effects. The pressure curve used in this simulation is experimentally validated for an engine speed of 2000 RPM. It was found that an increase in the top ring temperature reduces the oil's viscosity, decreasing the film thickness and increasing the risk of metal-to-metal contact. Increasing the roughness of the ring enhances oil film stability, especially at the bottom dead center (BDC) points during each phase of the operating cycle. Further, three different types of ring profiles were investigated for friction forces by varying the speed of the engine. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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18. Evolving Trends and Innovations in Facilities Management Within Higher Education Institutions.
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Mahmoud, Abubakar S., Hassanain, Mohammad A., and Alshibani, Adel
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SUSTAINABILITY ,BUILDING information modeling ,ENVIRONMENTAL quality ,UNIVERSITIES & colleges ,BIBLIOMETRICS - Abstract
The increasing global influence of FM in higher education institutions (HEIs) reported in the literature necessitates a comprehensive examination of the research landscape, with emphasis on how facility management (FM) plays a crucial role in enhancing the quality of teaching, learning, and research environments. This study provides an analysis of the research landscape of FM within HEIs. Using the PRISMA approach to analyze 428 documents from the Scopus™ database, this paper employs a combination of bibliometric analysis, systematic literature review, and meta-analysis to provide a comprehensive examination of FM research trends and key themes. This study reveals a significant increase in publications in the field of FM research over the past three decades, emphasizing its growing significance in fostering efficient and sustainable learning environments. The significant role of effective FM practices in enhancing student satisfaction, academic performance, and institutional reputation was emphasized. Indoor environmental quality (IEQ) (viz., thermal comfort, air quality, lighting, and acoustics) is crucial for the well-being and productivity of building occupants. The integration of FM with building information modeling (BIM), smart campus technologies, and sustainability initiatives has improved operational efficiency and environmental sustainability. This study underscores the importance of allocating resources for facility maintenance and professional services and implementing advanced technologies and sustainable practices in FM for HEIs to create a conducive academic environment. This study provides beneficial insights for researchers, policymakers, and practitioners aiming to increase FM in higher education. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
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19. A Review of Eco-Friendly Road Infrastructure Innovations for Sustainable Transportation.
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Tafida, Adamu, Alaloul, Wesam Salah, Zawawi, Noor Amila Bt Wan, Musarat, Muhammad Ali, and Abubakar, Adamu Sani
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SUSTAINABLE transportation ,CLIMATE change ,CLEAN energy ,ENERGY harvesting ,SUSTAINABLE development - Abstract
Eco-friendly road infrastructure is vital for the advancement of sustainable transportation and promotion of efficient urban mobility. This systematic literature review explores the current state of research and development in the eco-friendly road infrastructure area. This review explored three electronic databases to gather pertinent studies using the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines. This study explored a wide range of research areas pertinent to eco-friendly road infrastructure. The findings highlight significant progress in the utilization of recycled materials, integration of photovoltaic, piezoelectric, and other energy harvesting technologies, regulatory frameworks, AI and machine learning for monitoring, predictive maintenance, and other technologies to enhance road sustainability and performance. This review analyzed the development of eco-friendly road infrastructure and identified several challenges such as high initial costs, technical performance issues, regulatory gaps, limited public acceptance, and the complexity of integrating advanced technologies. Addressing these challenges will require collaboration, further advancement in knowledge, and standardized regulations. This review serves to broaden the knowledge of the area and offer direction for future research and policy discussions, underscoring the need for continuous advancement in eco-friendly road infrastructure to meet sustainable development goals and address the challenges of climate change. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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20. Modeling the Distribution of the Rare and Red-Listed Halophytic Moss Species Entosthodon hungaricus Under Various Climate Change Scenarios in Serbia.
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Abubakar, Isyaku, Pantović, Jovana P., Šinžar-Sekulić, Jasmina B., and Sabovljević, Marko S.
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ENDANGERED species ,HABITAT destruction ,SPECIES distribution ,CLIMATE change ,GRASSLANDS - Abstract
Entosthodon hungaricus is a rare moss species of the salty grasslands in Serbia. It is threatened with extinction due to habitat destruction and loss, although it reproduces sexually. In this study, we tested different models predicting its distribution under several climate scenarios over the next 8 decades. All models tested indicated a reduction in range to varying extents. Due to the specific substrate type as well as the predicted loss owing to the climate change, shifting is not an option for the survival of this species; and, therefore, it deserves special attention for its conservation and management. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
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21. A Facile Microwave-Promoted Formation of Highly Photoresponsive Au-Decorated TiO 2 Nanorods for the Enhanced Photo-Degradation of Methylene Blue.
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Bondarev, Andreea, Mihai, Sonia, Usman, Abubakar Katsina, Cursaru, Diana Luciana, Matei, Dănuţa, Sătulu, Veronica, Gheorghe, Cătălina, Brănoiu, Gheorghe, and Şomoghi, Raluca
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METHYLENE blue ,SURFACE plasmon resonance ,X-ray photoelectron spectroscopy ,NANOROD synthesis ,METAL nanoparticles - Abstract
The integration of noble metal nanoparticles (NPs) effectively modifies the electronic properties of semiconductor photocatalysts, leading to improved charge separation and enhanced photocatalytic performance. TiO
2 nanorods decorated with Au NPs were successfully synthesized using a cost-effective, rapid microwave-assisted method in H2 O2 and HF media for methylene blue (MB) degradation under visible light illumination. X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), transmission electron microscopy (TEM), N2 physisorption, and UV–vis spectroscopy were employed to characterize the structures, morphologies, compositions, and photoelectronic properties of the as-synthesized materials. The fusing of Au NPs effectively alters the electronic structure of TiO2 , enhancing the charge separation efficiency and improved electrical conductivity. The HF treatment promotes the exposure of the highly reactive (001) and (101) crystalline facets. The improved photocatalytic activity of Au/TiO2 , achieving 97% efficiency, is attributed to the surface plasmon resonance (SPR) effect of the Au NPs and the presence of oxygen vacancies. The photodegradation of MB using the TiO2 /Au photocatalysts follows pseudo-first-order kinetics, highlighting the enhanced catalytic efficiency of the synthesized nanostructures. The exceptional properties of the binary Au/TiO2 photocatalysts, including the SPR effect, exposed crystallographic faces, and efficient charge carrier separation through a decrease in the recombination of electrons and holes, contribute to the photocatalytic degradation of MB. [ABSTRACT FROM AUTHOR]- Published
- 2024
- Full Text
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22. Toxicity and Sublethal Effect of Chlorantraniliprole on Multiple Generations of Aedes aegypti L. (Diptera: Culicidae).
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Batool, Nimra, Abubakar, Muhammad, Noureldeen, Ahmed, Naqqash, Muhammad Nadir, Alghamdi, Akram, Al Dhafar, Zamzam M., Baakdah, Fadi, and Mozūratis, Raimondas
- Subjects
- *
CHLORANTRANILIPROLE , *AEDES aegypti , *INSECTICIDE resistance , *CYTOCHROME P-450 , *DISEASE vectors - Abstract
Simple Summary: Mosquitoes are vectors of various diseases in humans. Due to the quick development of insecticide resistance, it is crucial to optimize management programs by understanding the sublethal effects of effective insecticides like chlorantraniliprole on Aedes aegypti L. populations. For this purpose, a population of Ae. aegypti was reared in the laboratory for 15 generations then exposed to chlorantraniliprole and sublethal effects were studied on F1 and F2 generations. The following life history parameters were decreased significantly in exposed F1 and F2 generations compared to the control: larval duration, male longevity, female longevity, and oviposition days. The adult preoviposition and total preoviposition period did not differ significantly. The fecundity of Ae. aegypti in F1 generation decreased from 61 eggs/female in the control to 34 eggs/female in LC50. In conclusion, our findings demonstrate that sublethal doses of chlorantraniliprole have significant transgenerational effects on Ae. aegypti mosquitoes. The cautious usage of chlorantraniliprole is recommended for the effective management of mosquitoes and to lessen long-term influence on human health and the environment. Due to the quick development of insecticide resistance, it is crucial to optimize management programs by understanding the sublethal effects of effective insecticides like chlorantraniliprole on Aedes aegypti L. populations. Using age-stage and two-sex life tables, we investigated the sublethal impacts of chlorantraniliprole on Ae. aegypti. Larval duration in the progeny of exposed parents was reduced by 0.33–0.42 days, whereas, the longevity of male and female adults was decreased by 1.43–3.05 days. Similarly, the egg-laying capacity of F1 and F2 progeny of the exposed parents was significantly reduced from 27.3% to 41.2%. The mean generation time (T) increased up to 11.8% in exposed populations, and the net reproduction rate (Ro) decreased by 51.50–55.60%. After 24 h of chlorantraniliprole treatment, there was a significant increase in cytochrome P450 activity. Contrarily, the activity of glutathione S-transferase (GST) initially declined but started increasing after 48 h of treatment. This research highlights the importance of chlorantraniliprole in mosquito management, as well as the importance of considering sublethal effects when developing strategies to handle them. Having a thorough understanding of the harmful effects of insecticides on mosquito populations can greatly enhance the effectiveness of insecticide-based interventions, while also minimizing the risk of pest resurgence. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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23. The Antiviral Effects of Heat-Killed Lactococcus lactis Strain Plasma Against Dengue, Chikungunya, and Zika Viruses in Humans by Upregulating the IFN-α Signaling Pathway.
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Low, Zhao Xuan, Kanauchi, Osamu, Tiong, Vunjia, Sahimin, Norhidayu, Lani, Rafidah, Tsuji, Ryohei, AbuBakar, Sazaly, and Hassandarvish, Pouya
- Subjects
MONONUCLEAR leukocytes ,VIRUS diseases ,GENE expression ,MEMBRANE proteins ,ZIKA virus - Abstract
The growing risk of contracting viral infections due to high-density populations and ecological disruptions, such as climate change and increased population mobility, has highlighted the necessity for effective antiviral treatment and preventive measures against Dengue virus (DENV), Chikungunya virus (CHIKV), and Zika virus (ZIKV). Recently, there has been increasing attention on the use of probiotics as a potential antiviral option to reduce virus infections. The present study aimed to assess the immunomodulatory effects of heat-killed Lactococcus lactis strain plasma (LC-Plasma) on peripheral blood mononuclear cells (PBMCs) and its subsequent antiviral response against DENV, CHIKV, and ZIKV. To evaluate the immunomodulatory effects of LC-Plasma on PBMCs isolated from healthy individuals, PBMCs were cultured at a density of 2 × 10
5 cells/well and stimulated with 10 µg/mL of LC-Plasma. LC-plasma-stimulated PBMCs demonstrated elevated interferon-alpha (IFN-α) production and cluster of differentiation 86 (CD86) and human leukocyte antigen-DR isotype (HLA-DR) upregulation, potentially linked to plasmacytoid dendritic cell (pDC) activation. The replication of DENV, CHIKV, and ZIKV was dose-dependently inhibited when Huh-7 cells were stimulated with LC-Plasma-stimulated PBMC supernatant (LCP Sup). IFN-stimulated gene (ISG) expression, including IFN-stimulated gene 15 (ISG15), IFN-stimulated exonuclease gene 20 (ISG20), IFN-induced transmembrane protein 1 (IFITM-1), myxovirus resistance protein A (MxA), and radical S-adenosyl methionine domain-containing protein 2 (RSAD2), was significantly upregulated in LCP Sup-stimulated Huh-7 cells. Findings from this study indicate that LC-Plasma has the potential to induce IFN-α production, leading to an enhancement in the expression of ISGs and contributing to a broad-spectrum antiviral response. Thus, LC-Plasma may serve as a rational adjunctive treatment to ameliorate viral diseases, warranting future clinical trials. [ABSTRACT FROM AUTHOR]- Published
- 2024
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24. Recent Updates on the Secondary Metabolites from Fusarium Fungi and Their Biological Activities (Covering 2019 to 2024).
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Amuzu, Prosper, Pan, Xiaoqian, Hou, Xuwen, Sun, Jiahang, Jakada, Muhammad Abubakar, Odigie, Eromosele, Xu, Dan, Lai, Daowan, and Zhou, Ligang
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PATHOGENIC fungi ,ENDOPHYTIC fungi ,PHYTOPATHOGENIC fungi ,PLANT metabolites ,METABOLITES - Abstract
Fusarium species are commonly found in soil, water, plants, and animals. A variety of secondary metabolites with multiple biological activities have been recently isolated from Fusarium species, making Fusarium fungi a treasure trove of bioactive compounds. This mini-review comprehensively highlights the newly isolated secondary metabolites produced by Fusarium species and their various biological activities reported from 2019 to October 2024. About 276 novel metabolites were revealed from at least 21 Fusarium species in this period. The main metabolites were nitrogen-containing compounds, polyketides, terpenoids, steroids, and phenolics. The Fusarium species mostly belonged to plant endophytic, plant pathogenic, soil-derived, and marine-derived fungi. The metabolites mainly displayed antibacterial, antifungal, phytotoxic, antimalarial, anti-inflammatory, and cytotoxic activities, suggesting their medicinal and agricultural applications. This mini-review aims to increase the diversity of Fusarium metabolites and their biological activities in order to accelerate their development and applications. [ABSTRACT FROM AUTHOR]
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- 2024
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25. Appraising Education 4.0 in Nigeria's Higher Education Institutions: A Case Study of Built Environment Programmes.
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Ebekozien, Andrew, Hafez, Mohamed Ahmed, Aigbavboa, Clinton, Samsurijan, Mohamad Shaharudin, Al-Hasan, Abubakar Zakariyya, and Nwaole, Angeline Ngozika Chibuike
- Abstract
In the era of digitalisation, the construction industry is fast embracing digital technology, which evolved from Industry 4.0 (fourth industrial revolution [4IR]). Built environment programmes (BEPs) are expected to meet the needs of the digitalisation era via Education 4.0. Education 4.0 aims to transform education's future with diverse digital automation and innovative paedagogical procedures. Studies concerning Education 4.0 in Nigeria's BEPs are scarce. Hence, this study aims to appraise Education 4.0 and investigate the perceived issues facing implementing Education 4.0 in Higher Education Institutions (HEIs), using BEPs as a case study. The findings intend to improve Education 4.0 implementation practices in BEPs. Data were sourced from 40 participants across Nigeria for better coverage and representation via a semi-structured interview approach. The participants were knowledgeable about Education 4.0 and Nigeria's BEPs. This study adopted a thematic analysis of the virtually collected data and presented the findings in themes. This study shows that Education 4.0 implementation in Nigeria's BEPs is lax and should be overhauled to improve achieving Sustainable Development Goal 4 (SDG 4)—quality education—and other related SDGs. The findings reveal that improved Education 4.0 can enhance the achievement of SDG 4. The findings cluster the perceived 18 hindrances facing Education 4.0 implementation into three main groups. Also, the findings proffer feasible measures to improve Education 4.0 implementation in Nigeria's HEIs, using BEPs as a case study, via improved transformative competencies, technological advancement, innovative paedagogical procedures, and stakeholders' collaboration to improve achieving SDG 4. The proposed framework could assist in creating new values and transforming the students' BEP competencies via stakeholder collaboration and Education 4.0 for the private sector (future talents' beneficiary), thus fostering their employability. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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- View/download PDF
26. Forest Restoration through Village Common Forests in the Chittagong Hill Tracts of Bangladesh: The Role of NGO Interventions.
- Author
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Bari, Md. Shafiqul, Ali, Md. Manik, Alam, Mohammad Jahangir, Bashir, Mahmuod Abubakar, Sarkar, Oliver Tirtho, and Mukul, Sharif A.
- Abstract
Non-Governmental Organizations (NGOs) are widely recognized for their support of biodiversity conservation and forest restoration in tropical developing countries. In the Chittagong Hill Tracts (CHTs) of Bangladesh, ethnic forest-dependent communities have long maintained the Village Common Forest (VCF), an ancestral forest managed for community well-being. In recent years, some VCFs in the CHT have received support from local and international NGOs due to their perceived role in supporting biodiversity, ecosystem services, and improving local livelihoods. Although such support remains limited, its impacts on forest restoration and vegetation are not yet fully investigated. In the present study, we used remote sensing techniques and field surveys to measure vegetation cover changes and tree diversity in selected VCFs in the area. Our findings indicate that vegetation condition and tree diversity were better in NGO-supported VCFs compared with those without NGO intervention. Based on our study, we recommend increasing NGO involvement in VCF management with a more holistic and ecosystem-based approach, fostering institutional cooperation addressing land ownership issues, developing a market for forest ecosystem services, and improving local capacity for science-based forest management and ecosystem restoration in the CHT. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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27. Phenolic Contents and Antioxidant Properties of Bauhinia rufescens , Ocimum basilicum and Salvadora persica , Used as Medicinal Plants in Chad.
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Abdel-razakh, Hissein Hassan, Bakari, Gaymary George, Park, Jin-Soo, Pan, Cheol-Ho, and Hoza, Abubakar Shaaban
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AFRICAN traditional medicine ,ROSMARINIC acid ,BASIL ,PROCYANIDINS ,ETHYL acetate ,PHYTOCHEMICALS - Abstract
The plants Bauhinia rufescens, Ocimum basilicum and Salvadora persica are well known in traditional African medicine, and particularly in traditional Chadian medicine. They are commonly used to treat infectious diseases, inflammatory diseases, fevers, gastroenteritis and other medical conditions. The aim of this study was to perform a phytochemical screening to determine the antioxidant properties of different extracts and fractions from the three plants. Ethanolic extracts and solvent fractions were prepared and analyzed for total phenolic content (TPC), total flavonoid content (TFC) and total tannin content (TTC). LC-MS and an online screening HPLC-ABTS system identified phytochemicals with antioxidant activities. DPPH and ABTS reduction methods were used to test the extracts and fractions for their antioxidant potential. The results showed that the TPC of O. basilicum was higher than that of B. rufescens, ranging from 64.70 ± 5.2 to 411.16 ± 8.11 mgGAE/g DW. B. rufescens extracts and fractions, on the other hand, showed higher TFC, ranging from 69.5 ± 5.3 to 408.26 ± 8.42 mgQE/g DW, and higher TTC, ranging from 4.57 ± 2.45 to 62.19 ± 4.7 mgTAE/g DW. The maximum TPC, TFC and TTC in both plants were recorded in the ethyl acetate fractions. S. persica extracts and fractions showed a very low quantity of TPC, TFC and TTC. Based on LC-MS and HPLC-ABTS analysis, rosmarinic acid was identified as the major component in the extracts and all fractions of O. basilicum, and epicatechin, procyanidin B and quercetin were found in B. rufescens. S. persica did not exhibit specific substances with antioxidant activity and was therefore not considered for further assays. DPPH and ABTS results showed that ethyl acetate fractions of B. rufescens and O. basilicum have the strongest antioxidant activities. This study indicates that B. rufescens and O. basilicum are good sources of phytochemicals with antioxidant properties, suitable for medicinal use in Chadian communities. Additionally, the antioxidant-rich extracts from these plants hold significant potential for cosmetic development, enhancing skin health and protecting against oxidative-stress-induced damage. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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- View/download PDF
28. Modification of Lateritic Soil Using Waste Plastics for Sustainable Road Construction.
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Obianyo, Ifeyinwa Ijeoma, Taiwo, Ibitayo Akintayo, Dayyabu, Abubakar, Mahamat, Assia Aboubakar, Amuda, Akeem, Muoka, Anthony, Mambo, Abdulhameed Danjuma, and Onwualu, Azikiwe Peter
- Subjects
PLASTIC scrap ,CONSTRUCTION & demolition debris ,WASTE management ,ROAD construction ,SUSTAINABLE construction ,PLASTIC scrap recycling - Abstract
Lateritic soil, a prevalent geological material in tropical regions, often exhibits poor engineering properties, leading to road pavement failures. Meanwhile, the alarming rise in plastic waste poses environmental concerns. This innovative study explores the potential of utilizing waste plastics as a lateritic soil addictive for sustainable road construction. Varying percentages by weight of shredded waste plastic (2%, 4%, 6%, 8%, and 10%) were incorporated into lateritic soil samples, evaluating its effects on soil geotechnical properties. The results revealed that lateritized plastic (shredded plastic waste and lateritic soil) containing 2% shredded plastic waste gave the optimum maximum dry density of 1.985 g/cm
3 , and the lateritized plastic containing 10% shredded plastic waste gave the highest optimum moisture content of 18%. However, the lower California bearing ratio obtained on the addition of plastic waste showed that the lateritized plastic is relatively weak and can only be used for roads with low traffic. The incorporation of shredded plastic waste into lateritic soil for stabilization is a promising polymer science-based method. By reducing the need for conventional materials and diverting plastic waste from landfills, this approach contributes to a more environmentally friendly infrastructure supporting the achievement of United Nation Sustainable Development Goals. [ABSTRACT FROM AUTHOR]- Published
- 2024
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29. Fabrication of High-Performance Asphalt Mixture Using Waterborne Epoxy-Acrylate Resin Modified Emulsified Asphalt (WEREA).
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Chen, Dongwei, Wu, Hao, Chen, Xiaobao, Zhan, Yiqun, and Wada, Surajo Abubakar
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FATIGUE limit ,ASPHALT pavements ,VISCOELASTIC materials ,SHEAR strain ,STRAIN rate ,ASPHALT - Abstract
Existing research shows that using waterborne epoxy resin (WER) instead of emulsified asphalt as the binder for cold mix asphalt (CMA) can enhance the rutting resistance, high-temperature performance, fracture performance, and early performance of CMA. In order to eliminate the potential drawbacks such as insufficient strength and low-temperature performance of CMA during application, a novel method was proposed in this study for the preparation of waterborne epoxy-acrylate resin (WER), specifically tailored to modify emulsified asphalt, resulting in waterborne epoxy-acrylate resin emulsified asphalt (WEREA). The modification effect of WER on emulsified asphalt was evaluated through rheological tests and direct tensile tests. A modified design method based on the conventional Marshall design method was proposed to determine the optimal mix proportions, including the key parameters of specimen compaction and curing. The results revealed that the incorporation of WER led to a substantial improvement in the complex shear modulus and a concurrent decrease in the phase angle. When the temperature exceeded 60 °C, the phase angle exhibited a diminishing trend, indicative of a reduced viscosity as temperatures escalated. As the WER content increased, a decrease in the direct tensile strain rate was observed, accompanied by a substantial elevation in direct tensile strength. At various stress levels, the shear strain of WEREA decreases with increased content of WER, indicating that the incorporation of WER can enhance the hardness of emulsified asphalt and improve its deformation resistance. The results from MSCR tests indicate that WER could significantly improve the elasticity and hardness of emulsified asphalt, transitioning it from a viscoelastic material to an elastic material, thereby improving its deformation resistance, resistance to rutting, and high-temperature performance. The results of fatigue life are consistent with those of the amplitude sweep, both reflecting the improvement of resistance to deformation of emulsified asphalt by WER. This indicates that WER has a significant improving effect on the fatigue resistance of emulsified asphalt. Furthermore, the Marshall design tests further confirmed the advantages of WEREA in asphalt mixtures. The optimal preparation for the WEREA mixture was proposed as follows: double-sided compaction for 50 times each, aging at 60 °C for 48 h, optimal moisture content of 5.14%, cement content of 2.5%, and emulsion content of 8.4%. The optimal mix proportions identified through these tests yielded asphalt mixtures with significantly improved stability, reduced flow value, and enhanced rutting resistance compared to the hot-mix asphalt mixture (HMA) of AC-16. These findings suggest that WEREA has the potential to significantly enhance the durability and longevity of asphalt pavements. For future applications, it can be explored for use in producing cold recycled asphalt mixtures. In addition to designing the WEREA mixture according to AC-16 gradation, consideration can also be given to using a gradation with a smaller nominal maximum aggregate size for the application in the surface layer or ultra-thin wearing course. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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30. The Odd Beta Prime Inverted Kumaraswamy Distribution with Application to COVID-19 Mortality Rate in Italy
- Author
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Suleiman, Ahmad Abubakar, primary, Daud, Hanita, additional, Ishaq, Aliyu Ismail, additional, Othman, Mahmod, additional, Sokkalingam, Rajalingam, additional, Usman, Abubakar, additional, and Osi, Abdulhameed Ado, additional
- Published
- 2023
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- View/download PDF
31. Development of a Density-Based Traffic Light Signal System
- Author
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Abubakar, Umar, primary, Shuaibu, Abdullahi, additional, Haruna, Zaharuddeen, additional, Ore-Ofe, Ajayi, additional, Abubakar, Zainab Mukhtar, additional, and Adebiyi, Risikat Folashade, additional
- Published
- 2023
- Full Text
- View/download PDF
32. Advancing Skarn Iron Ore Detection through Multispectral Image Fusion and 3D Convolutional Neural Networks (3D-CNNs).
- Author
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Abubakar, Jabir, Zhang, Zhaochong, Cheng, Zhiguo, Yao, Fojun, and Bio Sidi D. Bouko, Abdoul-Aziz
- Subjects
- *
ASTER (Advanced spaceborne thermal emission & reflection radiometer) , *IRON ores , *CONVOLUTIONAL neural networks , *MULTISPECTRAL imaging , *PRINCIPAL components analysis - Abstract
This study explores novel techniques to improve the detection accuracy of skarn iron deposits using advanced image-processing methodologies. Leveraging the capabilities of ASTER image, band ratio (BR) images, and principal component analysis (PCA) alongside the power of 3D convolutional neural networks (3D-CNNs), the research aims to enhance the precision and efficiency of ore detection in complex geological environments. The proposed method employs a specific 3D-CNN architecture accepting input as a 7 × 7 × C image patch, where C represents the combined number of selected ASTER image bands, principal component (PC) bands, and computed BR images. To evaluate the accuracy of the proposed method, five distinct image band combinations, including the proposed band combination, were tested and evaluated based on the overall accuracy (OA), average accuracy (AA), and kappa coefficient. The results demonstrated that while the incorporation of BR images alongside ASTER bands initially seemed promising, it introduced significant confusion in certain classifications, leading to unexpected misclassification rates. Surprisingly, utilizing solely ASTER bands as input parameters yielded higher accuracy rates (OA = 93.13%, AA = 91.96%, kappa = 90.91%) compared with scenarios involving the integration with band ratios (OA = 87.02%, AA = 79.15, kappa = 82.60%) or the integration of BR images to PC bands (OA = 87.78%, AA = 82.39%, kappa = 83.81%). However, the amalgamation of ASTER bands with selected PC bands showed slight improvements in accuracy (OA = 94.65%, AA = 92.93%, kappa = 93.45%), although challenges in accurately classifying certain features persisted. Ultimately, the proposed combination of ASTER bands, PC bands, and BR images (proposed band combination) presented the most visually appealing and statistically accurate results (OA = 96.95%, AA = 94.87%, kappa = 95.93%), effectively addressing misclassifications observed in the other combinations. These findings underscore the synergistic contributions of each of the ASTER bands, PC bands, and BR images, with the ASTER bands proving pivotal for optimal skarn classification, the PC bands enhancing intrusions classification accuracy, and the BR images strengthening wall rock classification accuracy. In conclusion, the proposed combination of input image bands emerges as a robust and comprehensive methodology, demonstrating unparalleled accuracy in the remote sensing detection of skarn iron minerals. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
33. Emerging Roles of Exocyst Complex in Fungi: A Review.
- Author
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Zuriegat, Qussai, Abubakar, Yakubu Saddeeq, Wang, Zonghua, Chen, Meilian, and Zhang, Jun
- Subjects
- *
CELL physiology , *CYTOLOGY , *EUKARYOTIC cells , *CELL membranes , *CELLULAR signal transduction , *FUNGAL cell walls - Abstract
The exocyst complex, an evolutionarily conserved octameric protein assembly, plays a central role in the targeted binding and fusion of vesicles at the plasma membrane. In fungal cells, this transport system is essential for polarized growth, morphogenesis, cell wall maintenance and virulence. Recent advances have greatly improved our understanding of the role and regulation of the exocyst complex in fungi. This review synthesizes these developments and focuses on the intricate interplay between the exocyst complex, specific fungal cargos and regulatory proteins. Insights into thestructure of the exocyst and its functional dynamics have revealed new dimensions of its architecture and its interactions with the cellular environment. Furthermore, the regulation of exocyst activity involves complex signaling pathways and interactions with cytoskeletal elements that are crucial for its role in vesicle trafficking. By exploring these emerging themes, this review provides a comprehensive overview of the multifaceted functions of the exocyst complex in fungal biology. Understanding these mechanisms offers potential avenues for novel therapeutic strategies against fungal pathogens and insights into the general principles of vesicle trafficking in eukaryotic cells. The review therefore highlights the importance of the exocyst complex in maintaining cellular functions and its broader implications in fungal pathogenicity and cell biology. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
34. Medical IoT Record Security and Blockchain: Systematic Review of Milieu, Milestones, and Momentum.
- Author
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Ajakwe, Simeon Okechukwu, Saviour, Igboanusi Ikechi, Ihekoronye, Vivian Ukamaka, Nwankwo, Odinachi U., Dini, Mohamed Abubakar, Uchechi, Izuazu Urslla, Kim, Dong-Seong, and Lee, Jae Min
- Subjects
MEDICAL records ,MEDICAL personnel ,SECURITY classification (Government documents) ,BLOCKCHAINS ,DATA transmission systems - Abstract
The sensitivity and exclusivity attached to personal health records make such records a prime target for cyber intruders, as unauthorized access causes unfathomable repudiation and public defamation. In reality, most medical records are micro-managed by different healthcare providers, exposing them to various security issues, especially unauthorized third-party access. Over time, substantial progress has been made in preventing unauthorized access to this critical and highly classified information. This review investigated the mainstream security challenges associated with the transmissibility of medical records, the evolutionary security strategies for maintaining confidentiality, and the existential enablers of trustworthy and transparent authorization and authentication before data transmission can be carried out. The review adopted the PRSIMA-SPIDER methodology for a systematic review of 122 articles, comprising 9 surveys (7.37%) for qualitative analysis, 109 technical papers (89.34%), and 4 online reports (3.27%) for quantitative studies. The review outcome indicates that the sensitivity and confidentiality of a highly classified document, such as a medical record, demand unabridged authorization by the owner, unquestionable preservation by the host, untainted transparency in transmission, unbiased traceability, and ubiquitous security, which blockchain technology guarantees, although at the infancy stage. Therefore, developing blockchain-assisted frameworks for digital medical record preservation and addressing inherent technological hitches in blockchain will further accelerate transparent and trustworthy preservation, user authorization, and authentication of medical records before they are transmitted by the host for third-party access. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
35. In Vitro Drug Delivery through the Blood–Brain Barrier Using Cold Atmospheric Plasma.
- Author
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Alam, Md Jahangir, Sadiq, Abubakar Hamza, Kristof, Jaroslav, Rimi, Sadia Afrin, Hasan, Mahedi, Tomoki, Yamano, and Shimizu, Kazuo
- Subjects
COLD atmospheric plasmas ,REACTIVE oxygen species ,FLUORESCEIN isothiocyanate ,TIGHT junctions ,REACTIVE nitrogen species ,BLOOD-brain barrier - Abstract
This study explores the potential of cold atmospheric plasma (CAP) to facilitate the delivery of large-molecule drugs to the brain. The blood–brain barrier (BBB) restricts the passage of most drugs, hindering treatment for neurological disorders. CAP generates reactive oxygen and nitrogen species (RONS) that may disrupt the BBB's tight junctions, potentially increasing drug permeability. An in vitro BBB model and an immortalized cell line (bEND.3) were used in this experiment. Fluorescein isothiocyanate dextran (FD-4), a model drug, was added to the cells to determine drug permeability. Custom microplasma was used to produce reactive oxygen species (ROS). Trans-endothelial electrical resistance (TEER) measurements assessed the integrity of the BBB after the CAP treatment. A decrease in TEER was observed in the CAP-treated group compared to the controls, suggesting increased permeability. Additionally, fluorescence intensity measurements from the basal side of the trans-well plate indicated higher drug passage in the CAP-treated group. Moreover, the higher presence of ROS in the plasma-treated cells confirmed the potential of CAP in drug delivery. These findings suggest that CAP may be a promising approach for enhancing brain drug delivery. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
36. The Evolution of Vaccines Development across Salmonella Serovars among Animal Hosts: A Systematic Review.
- Author
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Siddique, Abubakar, Wang, Zining, Zhou, Haiyang, Huang, Linlin, Jia, Chenghao, Wang, Baikui, Ed-Dra, Abdelaziz, Teng, Lin, Li, Yan, and Yue, Min
- Subjects
EXTRACELLULAR vesicles ,BACTERIAL vaccines ,SALMONELLA diseases ,HEAT shock proteins ,VACCINE effectiveness ,HUMORAL immunity - Abstract
Salmonella is a significant zoonotic foodborne pathogen, and the global spread of multidrug-resistant (MDR) strains poses substantial challenges, necessitating alternatives to antibiotics. Among these alternatives, vaccines protect the community against infectious diseases effectively. This review aims to summarize the efficacy of developed Salmonella vaccines evaluated in various animal hosts and highlight key transitions for future vaccine studies. A total of 3221 studies retrieved from Web of Science, Google Scholar, and PubMed/Medline databases between 1970 and 2023 were evaluated. One hundred twenty-seven qualified studies discussed the vaccine efficacy against typhoidal and nontyphoidal serovars, including live-attenuated vaccines, killed inactivated vaccines, outer membrane vesicles, outer membrane complexes, conjugate vaccines, subunit vaccines, and the reverse vaccinology approach in different animal hosts. The most efficacious vaccine antigen candidate found was recombinant heat shock protein (rHsp60) with an incomplete Freund's adjuvant evaluated in a murine model. Overall, bacterial ghost vaccine candidates demonstrated the highest efficacy at 91.25% (95% CI = 83.69–96.67), followed by the reverse vaccinology approach at 83.46% (95% CI = 68.21–94.1) across animal hosts. More than 70% of vaccine studies showed significant production of immune responses, including humoral and cellular, against Salmonella infection. Collectively, the use of innovative methods rather than traditional approaches for the development of new effective vaccines is crucial and warrants in-depth studies. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
37. Efficacy of Thymoquinone and Hesperidin in Attenuating Cardiotoxicity from 5-Fluorouracil: Insights from In Vivo and In Silico Studies.
- Author
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Farooq, Juveriya, Sultana, Rokeya, James, Jainey P., Fathima C, Zakiya, Almutairy, Ali F., and Hussain, Abubakar Siddique Mustafa
- Subjects
ANTINEOPLASTIC agents ,MOLECULAR docking ,LABORATORY rats ,CARDIOTOXICITY ,OXIDANT status - Abstract
5-Fluorouracil (5-FU) is widely used in chemotherapy but poses serious risks of cardiotoxicity, which can significantly affect treatment outcomes. Identifying interventions that can prevent these adverse effects without undermining anticancer efficacy is crucial. This study investigates the efficacy of Thymoquinone (TQ) and Hesperidin (HESP) in preventing cardiotoxicity induced by 5-FU in Wistar rats and elucidates the molecular interactions through docking studies. We employed an experimental design involving multiple groups of Wistar rats exposed to 5-FU, with and without the concurrent administration of TQ and HESP. Cardiac function markers, oxidative stress indicators, and inflammatory markers were assessed. Additionally, molecular docking was used to analyze the interaction of TQ and HESP with key inflammatory proteins. Treatment with TQ and HESP not only lowered levels of cardiac enzymes but also improved antioxidant capacity and reduced inflammation in cardiac tissues. Notably, the combination of TQ and HESP provided more significant protective effects than either agent alone. Molecular docking supported these findings, showing effective binding of TQ and HESP to inflammatory targets. TQ and HESP demonstrate potential as protective agents against cardiotoxicity in 5-FU-treated rats, with their combined use offering enhanced protection. These findings suggest a viable strategy for reducing cardiac risks associated with 5-FU chemotherapy. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
38. Unlocking Cassava Brown Streak Disease Resistance in Cassava: Insights from Genetic Variability and Combining Ability.
- Author
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Sichalwe, Karoline Leonard, Kayondo, Siraj Ismail, Edema, Richard, Omari, Mikidadi Abubakar, Kulembeka, Heneriko, Rubaihayo, Patrick, and Kanju, Edward
- Subjects
RECESSIVE genes ,MOSAIC diseases ,GENETIC variation ,POLYMERASE chain reaction ,NATURAL immunity - Abstract
Cassava brown streak disease (CBSD) threatens cassava production in sub-Saharan Africa despite the availability of resistant varieties. Extreme environmental factors weaken plant defenses, reducing CBSD resistance. This study examined CBSD inheritance in cassava populations, assessed genetic variability, and identified superior sources of resistance using F1, S1, and half-sib offspring populations derived from resistant sources. The offspring underwent field evaluation at two distinct sites from 2019 to 2021, and the symptom-free genotypes were analyzed using reverse transcription-quantitative polymerase chain reaction (RT-qPCR). Resistance to CBSD was categorized as most resistant, resistant, most tolerant, or tolerant based on symptoms and virus titers. The findings indicated that the resistance to CBSD is highly influenced by genotypes, F1/S1 types, and environmental conditions. An analysis of combining abilities revealed significant general combining abilities (GCAs) for CBSD, cassava mosaic disease (CMD), and traits associated with yield. The heritability estimates for resistance to CBSD varied between 43.4% and 63.2% for foliar symptoms and 14.6% and 57.9% for root necrosis across locations. The inheritance pattern involved a combination of additive and recessive genes with selfed (S1) populations displaying stronger and more effective resistance to the disease. The cassava brown streak virus (CBSV) was highly prevalent, and the Ugandan cassava brown streak virus (UCBSV) was not prevalent. Four genotypes were highly resistant to CBSD and could be key sources of resistance to this disease. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
39. Advances in the Design of Renewable Energy Power Supply for Rural Health Clinics, Case Studies, and Future Directions.
- Author
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Abdulkarim, Abubakar, Faruk, Nasir, Alozie, Emmanuel, Olagunju, Hawau, Aliyu, Ruqayyah Yusuf, Imoize, Agbotiname Lucky, Adewole, Kayode S., Imam-Fulani, Yusuf Olayinka, Garba, Salisu, Baba, Bashir Abdullahi, Hussaini, Mustapha, Oloyede, Abdulkarim A., Abdullahi, Aminu, Kanya, Rislan Abdulazeez, and Usman, Dahiru Jafaru
- Subjects
BATTERY storage plants ,POWER resources ,MEDICAL personnel ,RENEWABLE energy sources ,MEDICAL care ,RURAL health - Abstract
Globally, effective and efficient healthcare is critical to the wellbeing and standard of living of any society. Unfortunately, several distant communities far from the national grid do not have access to reliable power supply, owing to economic, environmental, and technical challenges. Furthermore, unreliable, unavailable, and uneconomical power supply to these communities contributes significantly to the delivery of substandard or absence of qualitative healthcare services, resulting in higher mortality rates and associated difficulty in attracting qualified healthcare workers to the affected communities. Given these circumstances, this paper aims to conduct a comprehensive review of the status of renewable energy available to rural healthcare clinics around the globe, emphasizing its potential, analysis, procedures, modeling techniques, and case studies. In this light, several renewable energy modeling techniques were reviewed to examine the optimum power supply to the referenced healthcare centers in remote communities. To this end, analytical techniques and standard indices for reliable power supply to the isolated healthcare centers are suggested. Specifically, different battery storage systems that are suitable for rural healthcare systems are examined, and the most economical and realistic procedure for the maintenance of microgrid power systems for sustainable healthcare delivery is defined. Finally, this paper will serve as a valuable resource for policymakers, researchers, and experts in rural power supply to remote healthcare centers globally. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
40. Characterizing Forest Plot Decay Levels Based on Leaf Area Index, Gap Fraction, and L-Moments from Airborne LiDAR.
- Author
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Sani-Mohammed, Abubakar, Yao, Wei, Wong, Tsz Chung, Fekry, Reda, and Heurich, Marco
- Subjects
- *
LEAF area index , *FOREST canopy gaps , *FOREST management , *FOREST reserves , *AIRBORNE lasers , *FOREST dynamics - Abstract
Effective forest management is essential for mitigating climate change effects. This is why understanding forest growth dynamics is critical for its sustainable management. Thus, characterizing forest plot deadwood levels is vital for understanding forest dynamics, and for assessments of biomass, carbon stock, and biodiversity. For the first time, this study used the leaf area index (LAI) and L-moments to characterize and model forest plot deadwood levels in the Bavarian Forest National Park from airborne laser scanning (ALS) data. This study proposes methods that can be tested for forests, especially those in temperate climates with frequent cloud coverage and limited access. The proposed method is practically significant for effective planning and management of forest resources. First, plot decay levels were characterized based on their canopy leaf area density (LAD). Then, the deadwood levels were modeled to assess the relationships between the vegetation area index (VAI), gap fraction (GF), and the third L-moment ratio (T3). Finally, we tested the rule-based methods for classifying plot decay levels based on their biophysical structures. Our results per the LAD vertical profiles clearly showed the declining levels of decay from Level 1 to 5. Our findings from the models indicate that at a 95% confidence interval, 96% of the variation in GF was explained by the VAI with a significant negative association (VAIslope = −0.047; R2 = 0.96; (p < 0.001)), while the VAI explained 92% of the variation in T3 with a significant negative association (VAIslope = −0.50; R2 = 0.92; (p < 0.001)). Testing the rule-based methods, we found that the first rule (Lcv = 0.5) classified Levels 1 and 2 at (Lcv < 0.5) against Levels 3 to 5 at (Lcv > 0.5). However, the second rule (Lskew = 0) classified Level 1 (healthy plots) as closed canopy areas (Lskew < 0) against Levels 2 to 5 (deadwood) as open canopy areas (Lskew > 0). This approach is simple and more convenient for forest managers to exploit for mapping large forest gap areas for planning and managing forest resources for improved and effective forest management. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
41. Identification of Crude Distillation Unit: A Comparison between Neural Network and Koopman Operator.
- Author
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Abubakar, Abdulrazaq Nafiu, Khaldi, Mustapha Kamel, Aldhaifallah, Mujahed, Patwardhan, Rohit, and Salloum, Hussain
- Subjects
- *
LINEAR operators , *SYSTEM identification , *DISTILLATION , *GENERALIZATION , *COMPARATIVE studies - Abstract
In this paper, we aimed to identify the dynamics of a crude distillation unit (CDU) using closed-loop data with NARX−NN and the Koopman operator in both linear (KL) and bilinear (KB) forms. A comparative analysis was conducted to assess the performance of each method under different experimental conditions, such as the gain, a delay and time constant mismatch, tight constraints, nonlinearities, and poor tuning. Although NARX−NN showed good training performance with the lowest Mean Squared Error (MSE), the KB demonstrated better generalization and robustness, outperforming the other methods. The KL observed a significant decline in performance in the presence of nonlinearities in inputs, yet it remained competitive with the KB under other circumstances. The use of the bilinear form proved to be crucial, as it offered a more accurate representation of CDU dynamics, resulting in enhanced performance. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
42. Geotechnical Stability Analysis of the Tiga Dam, Nigeria on the Assessment of Downstream Soil Properties, Erosion Risk, and Seasonal Expansion.
- Author
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Umar, Ibrahim Haruna, Abubakar, Adamu, Salisu, Ibrahim Mu'azzam, Lin, Hang, and Hassan, Jubril Izge
- Subjects
UNIVERSAL soil loss equation ,EARTH dams ,PARTICLE size distribution ,HYDRAULIC structures ,SPECIFIC gravity - Abstract
The Tiga Dam, a primary hydraulic structure in northern Nigeria, is subjected to intense hydrological stress during the rainy season, posing potential risks to its structural integrity. This study investigates the geotechnical properties and stability of the Tiga Dam in Kano State, Nigeria. Twelve soil samples from the downstream area were analyzed for specific gravity, grain size distribution, Atterberg limits, compaction parameters, permeability, and shear strength. The dam's stability was assessed using Plaxis 2D under various reservoir conditions. Soil erodibility was evaluated using the Revised Universal Soil Loss Equation (RUSLE), and a linear regression model with noise was developed to predict soil expansion rates. The results showed heterogeneous soil properties, with specific gravity ranging from 2.11 to 2.63 and permeability from 3.40 × 10
−9 to 1.49 × 10−7 m/s. Stability analysis revealed factors of safety of 1.322, 1.006, 1.002, and 1.147 for high reservoir, rapid drawdown, slow drawdown, and low reservoir conditions, respectively. The RUSLE K factor ranged from 0.055 to 0.145, indicating low to moderate soil erodibility. The expansion rate model demonstrated high accuracy (R2 = 0.989) in predicting seasonal and long-term soil expansion trends, with peak rates increasing from 16.94 mm/month in 2010–2013 to 19.45 mm/month in 2017–2020. This comprehensive analysis provides crucial insights into the Tiga Dam's geotechnical behavior, highlighting potential vulnerabilities and the need for targeted management strategies to ensure long-term stability and safety. [ABSTRACT FROM AUTHOR]- Published
- 2024
- Full Text
- View/download PDF
43. Effects of β-Mannanase Supplementation and Soyhull Inclusion on Production Performance, Economics, Egg Quality, Blood Biochemicals, Nutrient Digestibility, and Intestinal Morphology in Golden Brown Hens (RIR × Fayoumi) during Late Peak Production
- Author
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Shuaib, Muhammad, Hafeez, Abdul, Tahir, Muhammad, Sufyan, Abubakar, Ullah, Obaid, Shams, Muhammad Adnan, Siddiqui, Shahrood Ahmed, and Swelum, Ayman A.
- Subjects
EGG quality ,HENS ,BLOOD cholesterol ,DRINKING (Physiology) ,WEIGHT gain ,EGGS ,EGGSHELLS - Abstract
Simple Summary: This study explored the effects of the different dietary combinations of soyhulls and the β-mannanase enzyme on production performance, economics, egg quality, blood biochemicals, nutrient digestibility, and gut health in laying hens during the late peak production phase. Golden brown hens were fed different diets for four weeks, and the combination of 3% soyhulls and 30 mg/kg β-mannanase showed potential benefits. It improved production performance and increased egg weight, albumen weight, and height while significantly lowering total cholesterol, LDL, and VLDL levels. This combination also improved gut morphology and enhanced nutrient digestibility. Overall, the inclusion of 3% soyhulls and 30 mg/kg β-mannanase in the diet may have positive effects on production performance, nutrient digestibility, and gut health and potentially lower serum cholesterol levels in laying hens while maintaining acceptable egg quality. This study investigated the effects of the β-mannanase enzyme and soyhulls on production performance, economics, egg quality, hematology and serum biochemistry, nutrient digestibility, gut morphology, digesta viscosity, and excreta consistency in laying hens during the late peak production phase (37 to 40 weeks of age). Golden brown hens (RIR × Fayoumi; n = 200) were fed a control diet (no soyhulls or enzymes) and diets containing four combinations, i.e., 3% soyhulls with 20 mg/kg β-mannanase (D1), 3% soyhulls with 30 mg/kg β-mannanase (D2), 9% soyhulls with 20 mg/kg β-mannanase (D3), and 9% soyhulls with 30 mg/kg β-mannanase (D4), for four weeks in four replicates of 10 birds each. Overall, a significantly higher (p < 0.05) feed intake, weight gain, feed conversion ratio, and water intake were calculated in the D2 group as compared to the control and remaining combinations of soyhulls and β-mannanase. No mortality was recorded during the entire experiment. Economically, the D1 and D2 groups showed the best results as compared to the D3 and D4 groups. Egg quality parameters like egg weight, shell weight and shell thickness, yolk weight, albumen weight and height, and the Haugh unit remained unchanged (p > 0.05). Similarly, the D2 group showed significantly lower total cholesterol, LDL, and VLDL levels and enhanced gut morphology with greater villus width, height, crypt depth, and surface area across intestinal segments. Crude protein (CP), crude fiber (CF), crude fat, and ash digestibility were higher (p < 0.05) in the D1 and D2 groups compared to the control. Digesta viscosity, excreta consistency, and other egg quality parameters remained unaffected. In conclusion, the dietary inclusion of a combination of 3% soyhulls and 30 mg/kg β-mannanase may have potential benefits for laying hens by improving some production performance and egg quality indicators and economics, lowering blood cholesterol, LDL, and VLDL levels, enhancing nutrient digestibility, and improving gut morphology without affecting egg quality. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
44. BIM Integration with XAI Using LIME and MOO for Automated Green Building Energy Performance Analysis.
- Author
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Khan, Abdul Mateen, Tariq, Muhammad Abubakar, Rehman, Sardar Kashif Ur, Saeed, Talha, Alqahtani, Fahad K., and Sherif, Mohamed
- Subjects
- *
BUILDING performance , *SUSTAINABILITY , *CLEAN energy , *SUSTAINABLE architecture , *BUILDING information modeling , *SUSTAINABLE construction , *GREEN technology - Abstract
Achieving sustainable green building design is essential to reducing our environmental impact and enhancing energy efficiency. Traditional methods often depend heavily on expert knowledge and subjective decisions, posing significant challenges. This research addresses these issues by introducing an innovative framework that integrates building information modeling (BIM), explainable artificial intelligence (AI), and multi-objective optimization. The framework includes three main components: data generation through DesignBuilder simulation, a BO-LGBM (Bayesian optimization–LightGBM) predictive model with LIME (Local Interpretable Model-agnostic Explanations) for energy prediction and interpretation, and the multi-objective optimization technique AGE-MOEA to address uncertainties. A case study demonstrates the framework's effectiveness, with the BO-LGBM model achieving high prediction accuracy (R-squared > 93.4%, MAPE < 2.13%) and LIME identifying significant HVAC system features. The AGE-MOEA optimization resulted in a 13.43% improvement in energy consumption, CO2 emissions, and thermal comfort, with an additional 4.0% optimization gain when incorporating uncertainties. This study enhances the transparency of machine learning predictions and efficiently identifies optimal passive and active design solutions, contributing significantly to sustainable construction practices. Future research should focus on validating its real-world applicability, assessing its generalizability across various building types, and integrating generative design capabilities for automated optimization. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
45. Multiscale Modeling of Elastic Waves in Carbon-Nanotube-Based Composite Membranes.
- Author
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Mahrous, Elaf N., Hawwa, Muhammad A., Abubakar, Abba A., and Al-Qahtani, Hussain M.
- Subjects
MODE shapes ,STRESS waves ,THEORY of wave motion ,MULTISCALE modeling ,ELASTIC waves ,CARBON nanotubes - Abstract
A multiscale model is developed for vertically aligned carbon nanotube (CNT)-based membranes that are made for water purification or gas separation. As a consequence of driving fluids through the membranes, they carry stress waves along the fiber direction. Hence, a continuum mixture theory is established for a representative volume element to characterize guided waves propagating in a periodically CNT-reinforced matrix material. The obtained coupled governing equations for the CNT-based composite are found to retain the integrity of the wave propagation phenomenon in each constituent, while allowing them to coexist under analytically derived multiscale interaction parameters. The influence of the mesoscale characteristics on the continuum behavior of the composite is demonstrated by dispersion curves of harmonic wave propagation. Analytically established continuum mixture theory for the CNT-based composite is strengthened by numerical simulations conducted in COMSOL for visualizing mode shapes and wave propagation patterns. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
46. Machine Learning-Based Forest Type Mapping from Multi-Temporal Remote Sensing Data: Performance and Comparative Analysis
- Author
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Ibrahim, Yusuf, primary, Bagaye, Umar Yusuf, additional, and Muhammad, Abubakar Ibrahim, additional
- Published
- 2023
- Full Text
- View/download PDF
47. Developing a Machine Learning-Based Software Fault Prediction Model Using the Improved Whale Optimization Algorithm
- Author
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Abubakar, Hauwa, primary, Umar, Kabir, additional, Auwal, Rukayya, additional, Muhammad, Kabir, additional, and Yusuf, Lawan, additional
- Published
- 2023
- Full Text
- View/download PDF
48. Machine Learning for Accurate Office Room Occupancy Detection Using Multi-Sensor Data
- Author
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Ibrahim, Yusuf, primary, Bagaye, Umar Yusuf, additional, and Muhammad, Abubakar Ibrahim, additional
- Published
- 2023
- Full Text
- View/download PDF
49. Comparative Analysis of Machine Learning and Deep Learning Models for Groundwater Potability Classification
- Author
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Suleiman, Ahmad Abubakar, primary, Yousafzai, Arsalaan Khan, additional, and Zubair, Muhammad, additional
- Published
- 2023
- Full Text
- View/download PDF
50. Phase-Resolved Partial Discharge (PRPD) Pattern Recognition Using Image Processing Template Matching.
- Author
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Abubakar, Aliyu and Zachariades, Christos
- Subjects
- *
PARTIAL discharges , *IMAGE processing , *MACHINE learning , *IMAGE recognition (Computer vision) , *COSINE function , *DEEP learning , *DIGITAL image processing - Abstract
This paper proposes a new method for recognizing, extracting, and processing Phase-Resolved Partial Discharge (PRPD) patterns from two-dimensional plots to identify specific defect types affecting electrical equipment without human intervention while retaining the principals that make PRPD analysis an effective diagnostic technique. The proposed method does not rely on training complex deep learning algorithms which demand substantial computational resources and extensive datasets that can pose significant hurdles for the application of on-line partial discharge monitoring. Instead, the developed Cosine Cluster Net (CCNet) model, which is an image processing pipeline, can extract and process patterns from any two-dimensional PRPD plot before employing the cosine similarity function to measure the likeness of the patterns to predefined templates of known defect types. The PRPD pattern recognition capabilities of the model were tested using several manually classified PRPD images available in the existing literature. The model consistently produced similarity scores that identified the same defect type as the one from the manual classification. The successful defect type reporting from the initial trials of the CCNet model together with the speed of the identification, which typically does not exceed four seconds, indicates potential for real-time applications. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
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