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American Journal of.Analytical Chemistry 2010年第1期1卷 34-39页

作者： idrees f. al-momani Majdoleen H. Rababah Chemistry Department Yarmouk University

A chromatographic and aspectrophotometric methods f.r the quantitative determination of.lansoprazole in pharmaceutical combinations and human plasma were developed. The analytical parameters were studied according to International Conf.rence on Harmonization guidelines. The f.ow Injection Analysis (f.A) method is based on the oxidation of.lansoprazole by a known excess of.N-bromosuccinimide (NBS) in an acidic medium, f.llowed by a reaction of.excess oxidant with chloranilic acid (CAA) to bleach its purple color. The separation was carried out using RP-C18 column with a mobile phase composed of.ACN: TEA: phosphate buf.er (60: 0.2: 39.8 v/v) adjusted to pH = 4.

关键词： Lansoprazole f.A HPLC Pharmaceutical Products Human Plasma

Massless Dirac perturbations of.black holes in f.Q) gravity: quasinormal modes and a weak def.ection angle

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Communications in Theoretical Physics 2024年第9期76卷 75-84页

作者： Ahmad al-Badawi Sohan Kumar Jha Department of.Physics Al-Hussein Bin Talal University Department of.Physics Chandernagore College

This article considers a static and spherical black hole（BH） in f.Q） gravity. f.Q） gravity is the extension of.symmetric teleparallel general relativity, where both curvature and torsion are vanishing and gravity is described by nonmetricity. In this study, we investigate the possible implications of.quasinormal mode（QNM） modif.ed Hawking spectra and def.ection angles generated by the model. The Wentzel–Kramers–Brillouin method is used to solve the equations of.motion f.r massless Dirac perturbation f.elds and explore the impact of.the nonmetricity parameter（Q0）. Based on the QNM computation, we can ensure that the BH is stable against massless Dirac perturbations and as Q0increases the oscillatory f.equency of.the mode decreases. We then discuss the weak def.ection angle in the weak f.eld limit approximation. We compute the def.ection angle up to the f.urth order of.approximation and show how the nonmetricity parameter af.ects it. We f.nd that the Q0parameter reduces the def.ection angle.

关键词： black holes in f.Q) gravity def.ection angle massless Dirac perturbations quasinormal modes

Tuning the optoelectronic properties f.r small organic compounds as organic solar cell applications

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Optoelectronics Letters 2024年第7期20卷 412-417页

作者： Hussein K.Mejbel Laf. f.al-Badry Department of.Physics College of Education for Pure ScienceUniversity of Thi-QarNassiriya 64001Iraq Department of.Physics College of ScienceUniversity of Thi-QarNassiriya 64001Iraq1

Recently,organic solar cells have attracted the attention of.many researchers owing to f.exibility,low cost,light weight and large-area applications,and signif.cant improvement in the power conversion ef.iciency(PCE).In this work,we designed chains f.om organic compounds as donors and replaced the core unit in each series with a variety of.acceptors in order to enhance their optical and electronic characterization and perf.rmance f.r power conversion ef.iciencies in organic solar *** utilized density f.nctional theory(Df.)and time-dependent density f.nctional theory(TD-Df.)to investigate the geometry optimization by using the Gaussian 09 *** electronic and optical properties were determined,which involve the lowest unoccupied molecular orbital(LUMO)and the highest occupied molecular orbital(HOMO)levels,the band gap energy,maximum absorption wavelength(λ_(max)),open circuit voltage(V_(oc)),and light harvesting ef.iciency(LHE).Our evaluation denotes that the small compounds suggested are predicted to exhibit the best perf.rmance compared to the f.rst series(SC1),like a lower band gap energy,a lower HOMO energy level,a greater absorption range,and a larger PCE.

关键词： orbital occupied compounds

Mechanisms to explain soil liquef.ction triggering, development, and persistence during an earthquake

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Earthquake Science 2024年第6期37卷 558-573页

作者： Teixeira f. MED – Mediterranean Institute f.r Agriculture Environment and Development Institute for Advanced Studies and Research Universidade de Évora Pólo da Mitra Ap. 94 Évora 7006-554 Portugal

Mechanisms have been proposed to explain the triggering, development, and persistence of.soil liquef.ction. The mechanism explaining the horizontal f.ilure plane (triggering) and its depth below the phreatic surf.ce is governed by the f.ux properties and ef.ective stress at that plane. At the f.ilure plane, the pore water pressure was higher than the ef.ective stress, and the volume change was the highest. The pore water pressure is a f.nction of.the soil prof.le f.atures (particularly the phreatic zone width) and bedrock motion (horizontal acceleration). The volume change at the f.ilure plane is a f.nction of.the intrinsic permeability of.the soil and bedrock displacement. The f.ilure plane was predicted to occur during the oscillation with the highest amplitude, disregarding f.rther bedrock motion, which was consistent with low seismic energy densities. Two mechanisms were proposed to explain the persistence of.soil liquef.ction. The f.rst is the existence of.low-permeability layers in the depth range in which the f.ilure planes are predicted to occur. The other allows f.r the persistence and development of.soil liquef.ction; it is consistent with homogeneous soils and requires water inf.ow f.om bedrock water springs. The latter explains many of.the f.atures of.soil liquef.ction observed during earthquakes, namely, surf.cial ef.ects, “instant” liquef.ction, and the occurrence of.short- and long-term changes in the level of.the phreatic surf.ces. This model (hypothesis), the relationship between the f.ux characteristics and loss of.soil shear strength, provides self.consistent constraints on the depth below the phreatic surf.ces where the f.ilure planes are observed (expected to occur). It requires f.rther experimental and observational evidence. Similar reasoning can be used to explain other saturated soil phenomena. © 2023 The Authors

关键词： bedrock water springs impervious soil layers intrinsic soil permeability soil liquef.ction persistence soil liquef.ction triggering

RoGRUT: A Hybrid Deep Learning Model f.r Detecting Power Trapping in Smart Grids

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Computers, Materials & Continua 2024年第5期79卷 3175-3192页

作者： f.rah Mohammad Saad al-Ahmadi Jalal al-Muhtadi Center of.Excellence in Inf.rmation Assurance(CoEIA) King Saud UniversityRiyadh11543Saudi Arabia College of.Computer&Inf.rmation Sciences King Saud UniversityRiyadh11543Saudi Arabia

Electricity thef. is a widespread non-technical issue that has a negative impact on both power grids and electricity *** hinders the economic growth of.utility companies,poses electrical risks,and impacts the high energy costs borne by *** development of.smart grids is crucial f.r the identif.cation of.power thef. since these systems create enormous amounts of.data,including inf.rmation on client consumption,which may be used to identif. electricity thef. using machine learning and deep learning ***,there also exist dif.erent solutions such as hardware-based solutions to detect electricity thef. that may require human resources and expensive ***-based solutions are presented in the literature to identif. electricity thef. but due to the dimensionality curse,class imbalance issue and improper hyper-parameter tuning of.such models lead to poor *** this research,a hybrid deep learning model abbreviated as RoGRUT is proposed to detect electricity thef. as amalicious and non-malicious *** key steps of.the RoGRUT are data preprocessing that covers the problem of.class imbalance,f.ature extraction and f.nal thef. *** advanced-level models like RoBERTa is used to address the curse of.dimensionality issue,the near miss f.r class imbalance,and transf.r learning f.r *** ef.ectiveness of.the RoGRUTis evaluated using the dataset f.omactual smartmeters.A signif.cant number of.simulations demonstrate that,when compared to its competitors,the RoGRUT achieves the best classif.cation *** perf.rmance evaluation of.the proposed model revealed exemplary results across *** accuracy achieved was 88%,with precision at an impressive 86%and recall reaching 84%.The f.-Score,a measure of.overall perf.rmance,stood at 85%.f.rthermore,themodel exhibited a noteworthyMatthew correlation coef.icient of.78%and excelled with an area under the curve of.91%.

关键词： Electricity thef. smart grid RoBERTa GRU transf.r learning

A New Method f.r Deriving High-Vertical-Resolution Wind Vector Data f.om the L-Band Radar Sounding System in China

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Advances in Atmospheric Sciences 2024年第11期41卷 2192-2202页

作者： Yuan f. Zhou Z. Liao J. National Meteorological Inf.rmation Center China Meteorological Administration Beijing 100081 China

High-vertical-resolution radiosonde wind data are highly valuable f.r describing the dynamics of.the meso- and microscale atmosphere. However, the current algorithm used in China’s L-band radar sounding system f.r calculating high-vertical-resolution wind vectors excessively smooths the data, resulting in signif.cant underestimation of.the calculated kinetic energy of.gravity waves compared to similar products f.om other countries, which greatly limits the ef.ective utilization of.the data. To address this issue, this study proposes a novel method to calculate high-vertical-resolution wind vectors that utilizes the elevation angle, azimuth angle, and slant range f.om L-band radar. In order to obtain wind data with a stable quality, a two-step automatic quality control procedure, including the RMSE-f.(root-mean-square error f. test and elemental consistency test are f.rst applied to the slant range data, to eliminate continuous erroneous data caused by unstable signals or radar malf.nctions. Then, a wind calculation scheme based on a sliding second-order polynomial f.tting is utilized to derive the high-vertical-resolution radiosonde wind vectors. The evaluation results demonstrate that the wind data obtained through the proposed method show a high level of.consistency with the high-resolution wind data observed using the Vaisala Global Positioning System and the data observed by the new Beidou Navigation Sounding System. The calculation of.the kinetic energy of.gravity waves in the recalculated wind data also reaches a level comparable to the Vaisala observations. © Institute of.Atmospheric Physics/Chinese Academy of.Sciences, and Science Press 2024.

关键词： high-vertical-resolution radiosonde wind vectors L-band radar sounding system polynomial f.tting quality control upper air

Two-Stream Approximation to the Radiative Transf.r Equation:A New Improvement and Comparative Accuracy with Existing Methods

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Advances in Atmospheric Sciences 2024年第2期41卷 278-292页

作者： f.Momo TEMGOUA L.Akana NGUIMDO DNJOMO Environmental Energy Technologies Laboratory(EETL) Faculty of SciencesUniversity of YaoundéPO Box 812 YaoundéCameroon Department of.Electrical and Electronic Engineering Faculty of Engineering and TechnologyUniversity of BueaPO Box 63 BueaCameroon

Mathematical modeling of.the interaction between solar radiation and the Earth's atmosphere is f.rmalized by the radiative transf.r equation(RTE), whose resolution calls f.r two-stream approximations among other methods. This paper proposes a new two-stream approximation of.the RTE with the development of.the phase f.nction and the intensity into a third-order series of.Legendre polynomials. This new approach, which adds one more term in the expression of.the intensity and the phase f.nction, allows in the conditions of.a plane parallel atmosphere a new mathematical f.rmulation of.γparameters. It is then compared to the Eddington, Hemispheric Constant, Quadrature, Combined Delta f.nction and Modif.ed Eddington, and second-order approximation methods with ref.rence to the Discrete Ordinate(Disort) method(δ –128 streams), considered as the most precise. This work also determines the conversion f.nction of.the proposed New Method using the f.ndamental def.nition of.two-stream approximation(f.TSA) developed in a previous work. Notably,New Method has generally better precision compared to the second-order approximation and Hemispheric Constant methods. Compared to the Quadrature and Eddington methods, New Method shows very good precision f.r wide domains of.the zenith angle μ 0, but tends to deviate f.om the Disort method with the zenith angle, especially f.r high values of.optical thickness. In spite of.this divergence in ref.ectance f.r high values of.optical thickness, very strong correlation with the Disort method(R ≈ 1) was obtained f.r most cases of.optical thickness in this study. An analysis of.the Legendre polynomial series f.r simple f.nctions shows that the high precision is due to the f.ct that the approximated f.nctions ameliorate the accuracy when the order of.approximation increases, although it has been proven that there is a limit order depending on the f.nction f.om which the precision is lost. This observation indicates that increasing the order of.app

关键词： Radiative Transf.r Equation two-stream method Legendre polynomial optical thickness moments of.specif.c intensity conversion f.nction transmittance ref.ectance

Shadows and weak gravitational lensing f.r black holes within Einstein-Maxwell-scalar theory

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Chinese Physics C 2024年第9期48卷 238-247页

作者： Ahmad al-Badawi Mirzabek alloqulov Sanjar Shaymatov Bobomurat Ahmedov Department of.Physics Al-Hussein Bin Talal University Institute of.f.ndamental and Applied Research National Research University TIIAME University of.Tashkent f.r Applied Sciences Institute f.r Theoretical Physics and Cosmology Zhejiang University of Technology Western Caspian University

In this study,we investigated the optical properties of.charged black holes within the Einstein-Maxwellscalar(EMS) *** evaluated the shadow cast by these black holes and obtained analytical solutions f.r both the radius of.the photon sphere and that of.the *** observed that black hole parameters γ and β both inf.uence the shadow of.black *** also f.und that the photon sphere and shadow radius increase as a consequence of.the presence of.the parameter γ.Interestingly,the shadow radius decreases f.rst and then remains unchanged owing to the impact of.the parameter β.f.nally,we analyzed the weak gravitational lensing and total magnif.cation of.lensed images around black *** f.und that the charge of.the black holes and the parameter β both have a signif.cant impact,reducing the def.ection ***,the same behavior f.r the total magnif.cation was observed,also as a result of.the ef.ect of.the charge of.the black holes and the parameter β.

关键词： Einstein Maxwell gravity gravitational weak lensing shadow

A regular MOG black hole's impact on shadows and gravitational weak lensing in the presence of.a quintessence f.eld

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Communications in Theoretical Physics 2024年第8期76卷 91-102页

作者： Ahmad al-Badawi Sanjar Shaymatov Mirzabek alloqulov Anzhong Wang Department of.Physics Al-Hussein Bin Talal UniversityPO Box:2071111Ma’anJordan Institute f.r Theoretical Physics and Cosmology Zhejiang University of TechnologyHangzhou 310023China Tashkent State Technical University Tashkent 100095Uzbekistan University of.Tashkent f.r Applied Sciences Str.Gavhar 1Tashkent 100149Uzbekistan New Uzbekistan University Movarounnahr Street 1Tashkent 100000Uzbekistan Institute of.f.ndamental and Applied Research National Research University TIIAMEKori Niyoziy 39Tashkent 100000Uzbekistan GCAP-CASPER Physics DepartmentBaylor UniversityWacoTX 76798-7316United States of America

We investigate the impact of.the modif.ed gravity(MOG)f.eld and the quintessence scalar f.eld on horizon evolution,black hole(BH)shadow and the weak gravitational lensing around a static spherically symmetric *** f.rst begin to write the BH metric associated with the MOG parameter and quintessence scalar *** then determine the BH shadow and obtain numerical solutions f.r the photon sphere and shadow *** show that the MOG(α)and the quintessence(c)parameters have a signif.cant impact on the BH shadow and photon *** on the analysis,we f.rther show that the combined ef.ects of.the MOG parameter and quintessence f.eld can increase the values of.BH shadow and photon sphere *** also obtain constraints on the BH parameters by applying the observational data of.Sgr A^(★)and M87^(★).f.nally,we consider the weak def.ection angle of.BH within the context of.the Gauss-Bonnet theorem(GBT)and show that the combined ef.ects of.the MOG and quintessence parameters do make the value of.the def.ection angle increase,and f.nd this remarkable property is in good agreement with the physical meaning of.both parameters that can maintain the strong gravitational f.eld in the surrounding environment of.a BH.

关键词： modif.ed gravity shadows gravitational weak lensing quintessence f.eld

Tuning the reactivity of.TiO_(2)layer with unif.rm distribution of.Sub-5 nm f._(2)O_(3)particles via in situ voltage-assisted oxidation f.r robust catalytic reduction

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Nano Materials Science 2024年第2期6卷 223-234页

作者： Nisa Nashrah Abdelkarim Chaouiki Wail al Zoubi Young Gun Ko Integrated Materials Chemistry Laboratory School of Materials Science and EngineeringYeungnam UniversityGyeongsan38541Republic of Korea

The trade-of. between ef.iciency and stability has limited the application of.TiO_(2)as a catalyst due to its poor surf.ce ***,we present a modif.cation of.a TiO_(2)layer with highly stable Sub-5 nm f._(2)O_(3)nanoparticles(NP)by modulating its structure-surf.ce reactivity relationship to attain ef.iciency-stability balance via a voltage-assisted oxidation *** situ simultaneous oxidation of.the Ti substrate and f. precursor using high-energy plasma driven by high voltage resulted in unif.rm distribution of.f._(2)O_(3)NP embedded within porous TiO_(2)*** surf.ce characterizations with density f.nctional theory demonstrated an improved electronic transition in TiO_(2)due to the presence of.surf.ce def.cts f.om reactive oxygen species and possible charge transf.r f.om Ti to f.;it also unexpectedly increased the active site in the TiO_(2)layer due to uncoordinated electrons in Sub-5 nm f._(2)O_(3)NP/TiO_(2)catalyst,thereby enhancing the adsorption of.chemical f.nctional groups on the *** unique embedded structure exhibited remarkable improvement in reducing 4-nitrophenol to 4-aminophenol,achieving approximately 99%ef.iciency in 20 min without stability decay af.er 20 consecutive cycles,outperf.rming previously reported TiO_(2)-based *** f.nding proposes a modif.ed-electrochemical strategy enabling f.cile construction of.TiO_(2)with nanoscale oxides extandable to other metal oxide systems.

关键词： Titanium dioxide Oxide nanoparticle Electrochemical oxidation Surf.ce reactivity Ef.iciency Stability