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Detection of Burned Areas through Spectral Indices Analysis of Sentinel-2A Satellite Images in the Abokouamékro Wildlife Reserve (Central, Côte D’Ivoire)

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Open Journal of Applied Sciences 2024年第1期14卷 205-222页

作者： Bob Kouakou Kouadio Sié Ouattara Alain Clément Jean-Marc gala Bi Zaouri Jean-Luc Kouadio Kouassi Jean-Luc Edouard Kouakou N’guessan Laboratoire des Sciences et Technologies de la Communication et de l’Information (LSTCI) Institut National Polytechnique Houphou&#235t Boigny (INP-HB) Yamoussoukro C&#244te d’Ivoire Laboratoire des Sciences Agronomiques et Génie Rural Institut National Polytechnique Houphou&#235t Boigny (INPHB) Yamoussoukro C&#244te d’Ivoire Ecole de Géomatique et du Territoire (EGT) Abidjan C&#244te d’Ivoire LARIS SFR MATHSTIC Université d’Angers Angers France Centre Universitaire de Recherche et d’application en Télédétection (CURAT) UFR des Sciences de la Terre et des Ressources Minières Abidjan C&#244te d’Ivoire Laboratoire de Botanique UFR Biosciences Université Félix Houphou&#235t Boigny Abidjan C&#244te d’Ivoire

In Côte d’Ivoire, the recurring and unregulated use of bushfires, which cause ecological damage, presents a pressing concern for the custodians of protected areas. This study aims to enhance our comprehension of the dynamics of burnt areas within the Abokouamékro Wildlife Reserve (AWR) by employing the analysis of spectral indices derived from satellite imagery. The research methodology began with the calculation of mean indices and their corresponding spectral sub-indices, including NDVI, SAVI, NDWI, NDMI, BAI, NBR, TCW, TCG, and TCB, utilizing data from the Sentinel-2A satellite image dated January 17, 2022. Subsequently, a fuzzy classification model was applied to these various indices and sub-indices, guided by the degree of membership α, with the goal of effectively distinguishing between burned and unburned areas. Following the classification, the accuracies of the classified indices and sub-indices were validated using the coordinates of 100 data points collected within the AWR through GPS technology. The results revealed that the overall accuracy of all indices and sub-indices declines as the degree of membership α decreases from 1 to 0. Among the mean spectral indices, NDVI-mean, SAVI-mean, NDMI-mean exhibited the highest overall accuracies, achieving 97%, 95%, and 90%, respectively. These results closely mirrored those obtained by sub-indices using band 8 (NDVI-B8, SAVI-B8, and NDMI-B8), which yield respective overall accuracies of 93%, 92%, and 89%. At a degree of membership α = 1, the estimated burned areas for the most effective indices encompassed 2144.38 hectares for NDVI-mean, 1932.14 hectares for mean SAVI-mean, and 4947.13 hectares for mean NDMI-mean. A prospective approach involving the amalgamation of these three indices could have the potential to yield improved outcomes. This study could be a substantial contribution to the discrimination of bushfires in Côte d’Ivoire.

关键词： Spectral Indices Wildfire Burned Areas Abokouamékro Wildlife Reserve Côte D’Ivoire

Nature meets technology:Harnessing nanotechnology to unleash the power of phytochemicals

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Clinical Traditional Medicine and Pharmacology 2024年第3期5卷 111-124页

作者： Divya Teli Riyansi Satasia Vishwa Patel Ruchi Nair Rudri Khatri Dhvani gala Pankti C.Balar Kishan Patel Anu Sharma Palak Vadodariya Vivek P.Chavda Department of Pharmaceutical Chemistry L.M.college of pharmacyAhmedabadGujarat380009India Department of Chemistry School of ScienceGujarat UniversityAhmedabadGujarat380009India Pharmacy section L.M.college of pharmacyAhmedabadGujarat380009India Department of Chemistry University at BuffaloBuffaloNY 14260United States of America Department Pharmaceutical Sciences University of MassachusettsBostonMA 02125United States of America Faculty of Pharmacy Marwadi UniversityRajkotGujarat360006India Department of Pharmaceuticals and Pharmaceutical Technology L.M.college of pharmacyAhmedabadGujarat380009India

Background:Phytochemicals encompass a diverse array of bioactive substances originating from plants,exhibit-ing a broad spectrum of possible health-promoting ***,the clinical uses of these compounds are restricted due to their limited solubility,stability,bioavailability,and target ***-based delivery methods present a viable approach to address these problems and enhance the properties and biological activity of *** have the potential to augment the solubility,bioavailability,and pharmacokinetics of phytochemicals by means of several *** potential approach to enhance the surface area and solubility of phytochemicals is by lowering their particle *** process of adsorption of surfactants onto phytochemical particles can lead to the formation of micelles,which exhibit solubility in ***-mulations have the potential to enhance the uptake of phytochemicals across many biological barriers,including the intestinal ***:To study the potential of nanoformulation in enhancing the therapeutic action of phytochemicals Method:Systemic review was performed while considering some aspects of PRISM ***:The nanoparticles have a great potential in delivering the phytochemicals and could of great help in the management of various ***,exhaustive research and clinical trials are yet demanded to provide the evidential proof for the ***:In conclusion,the utilisation of ligand-functionalized nanoparticles enables the precise targeting of phytochemicals to particular cells or *** field of nanotechnology has significant promise in transform-ing the advancement and administration of phytochemicals for medicinal and preventative *** utilisation of nanotechnology holds promise in addressing the obstacles related to the physicochemical charac-teristics of phytochemicals,hence enabling the development of enhanced and precise delivery

关键词： Phytochemicals Nanotechnology Bioactivity Enhancement

A Note on the Blow-up Criterion of Smooth Solutions to the 3D Incompressible MHD Equations

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Acta Mathematicae Applicatae Sinica 2012年第4期28卷 639-642页

作者： Sadek gala Department of Mathematics University of MostaganemBox 227Mostaganem 27000Algeria

In this note, we will give a new proof of the blow-up criterion of smooth solutions to the 3D incompressible magneto-hydrodynamic equations by a simple application of Gagliardo-Nirenberg＇ s inequality.

关键词： ideal MHD equations blow-up littlewood-paley decomposition besov space

A Logarithmically Improved Regularity Criterion for the Supercritical Quasi-geostrophic Equations in Besov Space

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Acta Mathematicae Applicatae Sinica 2017年第3期33卷 679-686页

作者： Sadek gala Department of Mathematics University of MostaganemBox 227Mostaganem 27000Algeria

In this paper, we consider the logarithmically improved regularity criterion for the supercritical quasi-geostrophic equation in Besov space B ∞,∞ -r （R2）. The result shows that if 0 is a weak solutions satisfies ∫ 0 T ｜｜ θ （·,s）｜｜a/a-r B ∞,∞ -r /（1＋ln（e＋｜｜ ⊥（·,s）｜｜ L r2） ds〈∞ for some 0〈r〈a and 0〈a〈1,then θ is regular at t = T. In view of the embedding L 2/r M p 2/r B ∞,∞ -r with 2≤p〈2/r and 0≤r〈1, we see that our result extends the results due to [20] and [31].

关键词： quasi-geostrophic equations logarithmical regularity criterion Besov space

REMARK ON THE BLOW-UP CRITERION OF STRONG SOLUTIONS TO THE NAVIER-STOKES EQUATIONS IN MULTIPLIER SPACES

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Acta Mathematica Scientia 2010年第5期30卷 1413-1418页

作者： Sadek gala Department of Mathematics University of Mostaganem

In this note, we prove that Xr （0 〈 r 〈 1） norm of the vorticity controls the blow-up phenomena of strong solutions to the Navier-Stokes equations in R3.

关键词： Navier-Stokes equation blow-up criterion a priori estimates

A Remark on the Beale-Kato-Majda Criterion for the 3D MHD Equations with Zero Kinematic Viscosity

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Acta Mathematicae Applicatae Sinica 2012年第2期28卷 209-214页

作者： Sadek gala Xiao-chun CHEN Department of Mathematics University of Mostaganem Box 227 Mostaganem 27000 Algeria Department of Mathematics Chonqing Three Gorges University Wanzhou 404000 China

In this paper, we study the blow-up criterion of smooth solutions to the 3D magneto-hydrodynamic system in B^0∞,∞. We show that a smooth solution of the 3D MHD equations with zero kinematic viscosity in the whole sp... 详细信息

关键词： Magneto-hydrodynamic equations with zero viscosity B^0∞,∞ space blow-up criterion

Electronic properties and photodegradation ability of Nd-TiO_(2)for phenol

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Journal of Rare Earths 2022年第7期40卷 1063-1072页

作者： Zhimin Zhao Jinjia Liu gala Sa Aiju Xu Inner Mongolia Key Laboratory of Green Catalysis College of Chemistry and Environmental ScienceInner Mongolia Normal UniversityHohhot 010022China State Key Laboratory of Coal Conversion Institute of Coal Chemistry Chinese Academy of SciencesTaiyuan 030001China National Energy Center for Coal to Clean Fuels Synfuels China Co.Ltd.Beijing 101400China

In this study,the photocatalytic activity of Nd-TiO_(2)photocatalysts obtained by common hydrothermal method was evaluated by practical experiments and theoretical calculations based on density functional theory(DFT).The synthesized photocatalysts were characterized by X-ray diffraction(XRD),N_(2)adsorption-desorption,Fourier transform infrared spectroscopy(FT-IR),high resolution transmission electron microscopy(HRTEM),X-ray photoelectron spectroscopy(XPS),UV-Vis diffuse reflectance spectroscopy(DRS),and photoluminescence(PL)to study their physical/chemical prope *** the same time,the photoelectronic performance was also *** photodegradation ability of asprepared photocatalysts and the effect of Nd doped amount and photocatalysts dosage were investigated by the photodegradation of phenol(30 mg/L)under 400 W metal halide lamp(UV-Vis).The effect of Nd on electronic properties of TiO_(2)and adsorption ability of phenol were *** show the red-shift wavelength of 0.5 mol%Nd-TiO_(2),indicating that its absorption capacity is stronger than pristine TiO_(2)in the same wavelength *** result of DFT calculations demonstrates that the optical bandgap of Nd-TiO_(2)is profoundly reduced,thus the light absorption ability is promoted,which will be responsible for the enhanced photocatalytic performance of Nd-TiO_(2).0.5 mol%Nd is an optimum value for photodegradation phenol,and phenol can be completely degraded by 0.5 mol%Nd-TiO_(2)for 210 min,the higher catalytic performance is derived from the efficient separation of e-/h+***,the adsorption energy calculations of phenol on TiO_(2)(101)and Nd-TiO_(2)(101)demonstrate that the Nd doping can significantly enhance the adsorption ability of phenol on catalyst surfaces because of the formation of Nd-O *** last,the stability measurement through four recycles exhibits that 0.5 mol%Nd-TiO_(2)possesses excellent stability.

关键词： TiO_(2) Hydrothermal method Density functional theory Phenol Photodegradation Rare earths

ON THE REGULARITY CRITERIA OF THE 3D NAVIER-STOKES EQUATIONS IN CRITICAL SPACES

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Acta Mathematica Scientia 2011年第2期31卷 591-600页

作者：董柏青 Sadek gala 陈志敏 School of Mathematical Sciences Anhui University Department of Mathematics University of Mostaganem School of Engineering Sciences University of Southampton

Regularity criteria of Leray-Hopf weak solutions to the three-dimensional Navier-Stokes equations in some critical spaces such as Lorentz space, Morrey space and multiplier space are derived in terms of two partial de... 详细信息

关键词： Regularity criteria Navier-Stokes equations

Text-mining-based Fake News Detection Using Ensemble Methods

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International Journal of Automation and computing 2020年第2期17卷 210-221页

作者： Harita Reddy Namratha Raj Manali gala Annappa Basava Department of Computer Science and Engineering National Institute of Technology KarnatakaMangalore 575025India

Social media is a platform to express one′s views and opinions freely and has made communication easier than it was *** also opens up an opportunity for people to spread fake news *** ease of access to a variety of news sources on the web also brings the problem of people being exposed to fake news and possibly believing such *** makes it important for us to detect and flag such content on social *** the current rate of news generated on social media,it is difficult to differentiate between genuine news and hoaxes without knowing the source of the *** paper discusses approaches to detection of fake news using only the features of the text of the news,without using any other related *** observe that a combination of stylometric features and text-based word vector representations through ensemble methods can predict fake news with an accuracy of up to 95.49%.

关键词： Fake news social media stylometric features word vectors ensemble methods