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Characterizing Spatial Variability of Soil Textural Fractions and Fractal Parameters Derived from Particle Size Distributions

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Pedosphere 2019年第2期29卷 224-234页

作者： Meysam MOHAMMADI Mahmoud SHABANPOUR Mohammad Hossein MOHAMMADI nasser DAVATGAR Department of Soil Science Faculty of Agriculture University of Guilan Department of Soil Science Faculty of Agricultural Engineering and Technology University of Tehran Department of Soil Science Research Institute of Soil and Water

Soil particle size distribution(PSD) is a fundamental physical property affecting other soil properties. Characterizing spatial variability of soil texture is very important in environmental research. The objectives of this work were: 1) to partition PSD of 75 soil samples, collected from a flat field in the University of Guilan, Iran, into two scaling domains using a piecewise fractal model to evaluate the relationships between fractal dimensions of scaling domains and soil clay, silt, and sand fractions and 2) to assess the potential of fractal parameters as an index used in a geostatistical approach reflecting the spatial variability of soil texture. Features of PSD of soil samples were studied using fractal geometry, and geostatistical techniques were used to characterize the spatial variability of fractal and soil textural parameters. There were two scaling domains for the PSD of soil samples. The fractal dimensions of these two scaling domains(D_1 and D_2) were then used to characterize different ranges of soil particle sizes and their relationships to the soil textural parameters. There was a positive correlation between D_1 and clay content(R^2= 0.924), a negative correlation between D_1 and silt content(R^2= 0.801), and a negative correlation between D_2 and sand content(R^2= 0.913). The geometric mean diameter of soil particles had a negative correlation with D_1(R^2= 0.569) and D_2(R^2= 0.682). Semivariograms of fractal dimensions and soil textural parameters were calculated and the maps of spatial variation of D_1 and D_2 and soil PSD parameters were provided using ordinary kriging. The results showed that there were also spatial correlations between D_1 and D_2 and particle size *** to the semivariogram models and validation parameters, the fractal parameters had powerful spatial structure and could better describe the spatial variability of soil texture.

关键词： fractal dimension geometric mean diameter geostatistical approach physical property semivariogram model statistical correlation

Comparative Study of Zamzam, Bottled Drinking and Distilled Waters by a Novel Computer Simulation Speckle Photography Method Using Fourier Transform

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Open Journal of Applied Sciences 2022年第9期12卷 1577-1594页

作者： nasser A. Moustafa Hasan Assaedi Thamer H. Albaqami Physics Department Faculty of Science Helwan University Cairo Egypt Physics Department Teachers Colleges of Makkah Umm-Al-Qura University Mecca Mecca Province KSA

The refractive index of a liquid medium is an important optical parameter since it exhibits the optical properties of the liquid. Its values are often required to interpret various types of spectroscopic data. The intensity distribution and contrast of image speckle patterns obtained for Zamzam, bottled drinking and distilled waters are investigated on a computer as a function of six discrete wavelengths across the visible spectrum. The present novel computer simulation speckle photography using Fourier transform study and the new theoretical background have been confirmed with previous experimental results. Uncertainty of refractive index measurements was studied on a wide range of discrete wavelengths using the computer simulation and the new theoretical formulae.

关键词： Zamzam Water Speckle Photography Measurement Uncertainty Comparative Measurement

GDF15 promotes prostate cancer bone metastasis and colonization through osteoblastic CCL2 and RANKL activation

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Bone Research 2022年第1期10卷 150-164页

作者： Jawed Akhtar Siddiqui Parthasarathy Seshacharyulu Sakthivel Muniyan Ramesh Pothuraju Parvez Khan Raghupathy Vengoji Sanjib Chaudhary Shailendra Kumar Maurya Subodh Mukund Lele Maneesh Jain Kaustubh Datta Mohd Wasim nasser Surinder Kumar Batra Department of Biochemistry and Molecular Biology University of Nebraska Medical CenterOmahaNEUSA Department of Pathology and Microbiology University of Nebraska Medical CenterOmahaNEUSA Fred&Pamela Buffett Cancer Center University of Nebraska Medical CenterOmahaNE 68198-5870USA Eppley Institute for Research in Cancer and Allied Diseases University of Nebraska Medical CenterOmahaNEUSA

Bone metastases occur in patients with advanced-stage prostate cancer(PCa). The cell-cell interaction between PCa and the bone microenvironment forms a vicious cycle that modulates the bone microenvironment, increases bone deformities, and drives tumor growth in the bone. However, the molecular mechanisms of PCa-mediated modulation of the bone microenvironment are complex and remain poorly defined. Here, we evaluated growth differentiation factor-15(GDF15) function using in vivo preclinical PCa-bone metastasis mouse models and an in vitro bone cell coculture system. Our results suggest that PCa-secreted GDF15 promotes bone metastases and induces bone microarchitectural alterations in a preclinical xenograft model. Mechanistic studies revealed that GDF15 increases osteoblast function and facilitates the growth of PCa in bone by activating osteoclastogenesis through osteoblastic production of CCL2 and RANKL and recruitment of osteomacs. Altogether, our findings demonstrate the critical role of GDF15 in the modulation of the bone microenvironment and subsequent development of PCa bone metastasis.

关键词： GDF15 metastasis RANKL

Digital Signal Processing System-Level Design Using LabVIEW 1

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NON-EXISTENCE FOR FRACTIONALLY DAMPED FRACTIONAL DIFFERENTIAL PROBLEMS

2005年

作者： nasser Kehtarnavaz Namjin Kim

ISBN: (数字)9780080477244

ISBN: (纸本)9780750679145

LabVIEW (Laboratory Virtual Instrumentation Engineering Workbench) developed by National Instruments is a graphical programming environment. Its ease of use allows engineers and students to streamline the creation of code visually, leaving time traditionally spent on debugging for true comprehension of DSP. This book is perfect for practicing engineers, as well as hardware and software technical managers who are familiar with DSP and are involved in system-level design. With this text, authors Kehtarnavaz and Kim have also provided a valuable resource for students in conventional engineering courses. The integrated lab exercises create an interactive experience which supports development of the hands-on skills essential for learning to navigate the LabVIEW program. Digital Signal Processing System-Level Design Using LabVIEW is a comprehensive tool that will greatly accelerate the DSP learning process. Its thorough examination of LabVIEW leaves no question unanswered. LabVIEW is the program that will demystify DSP and this is the book that will show you how to master it.

关键词： System designComputer programs.Signal processingDigital techniquesComputer programs.

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Acta Mathematica Scientia 2017年第1期37卷 119-130页

作者： Mohnmmed D,KASSIM Khaled M.FURATI nasser-eddine TATAR Department of Mathematics and Statistics King Fahd University of Petroleum and MineralsDhahran31261Saudi Arabia

In this paper, we are concerned with a fractional differential inequality containing a lower order fractional derivative and a polynomial source term in the right hand side. A non-existence of non-trivial global solutions result is proved in an appropriate space by means of the test-function method. The range of blow up is found to depend only on the lower order derivative. This is in line with the well-known fact for an internally weakly damped wave equation that solutions will converge to solutions of the parabolic part.

关键词： nonexistence global solution fractional differential equation Riemann-Liouvillefractional integral and fractional derivative

Clinical and cost impact of intravenous proton pump inhibitor use in non-ICU patients

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World Journal of Gastroenterology 2010年第8期16卷 982-986页

作者： Soumana C nasser Jeanette G Nassif Hani I Dimassi Department of Pharmacy Practice School of PharmacyLebanese American University

AIM:To assess the appropriateness of the indication and route of administration of proton-pump-inhibitors (PPIs) and their associated cost impact. METHODS:Data collection was performed prospec-tively during a 6-mo period on 340 patients who re-ceived omeprazole intravenously during their hospital stay in non-intensive care floors. Updated guidelines were used to assess the appropriateness of the indication and route of administration. RESULTS:Complete data collection was available for 286 patients which were used to assess intravenous (IV) PPIs utilization. Around 88% of patients were receiving PPIs for claimed stress ulcer prophylaxis (SUP) indication; of which,only 17% met the guideline criteria for SUP indication,14% met the criteria for non-steroidal-anti-inflammatory drugs-induced ulcer prophylaxis,while the remaining 69% were identifi ed as having an unjustified indication for PPI use. Theinitiation of IV PPIs was appropriate in 55% of pa-tients. Half of these patients were candidates for switching to the oral dosage form during their hos-pitalization,while only 36.7% of these patients were actually switched. The inappropriate initiation of PPIs via the IV route was more likely to take place on the medical floor than the surgical floor (53% vs 36%,P = 0.003). The cost analysis associated with the appro-priateness of the indication for PPI use as well as the route of administration of PPI revealed a possible saving of up to $17 732.5 and $14 571,respectively. CONCLUSION:This study highlights the over-utili-zation of IV PPIs in non-intensive care unit patients. Restriction of IV PPI use for justified indications and route of administration is recommended.

关键词： Cost saving Lebanon Non-intensive care unit patients Omeprazole Over-utilization Proton-pump-inhibitors Stress ulcer prophylaxis

Simultaneous knowledge-based identification and optimization of PHEV fuel economy using hyper-level Pareto-based chaotic Lamarckian immune algorithm, MSBA and fuzzy programming

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International Journal of Intelligent Computing and Cybernetics 2015年第1期8卷 2-27页

作者： Ahmad Mozaffari nasser L.Azad Alireza Fathi Systems Design Engineering Department University of WaterlooWaterlooCanada Department of Mechanical Engineering Babol University of TechnologyBabolIran

Purpose–The purpose of this paper is to probe the potentials of computational intelligence(CI)and bio-inspired computational tools for designing a hybrid framework which can simultaneously design an identifier to capture the underlying knowledge regarding a given plug-in hybrid electric vehicle’s(PHEVs)fuel cost and optimize its fuel consumption ***,the current investigation aims at elaborating the effectiveness of Pareto-based multiobjective programming for coping with the difficulties associated with such a tedious automotive engineering ***/methodology/approach–The hybrid intelligent tool is implemented in two different *** hyper-level algorithm is a Pareto-based memetic algorithm,known as the chaos-enhanced Lamarckian immune algorithm(CLIA),with three different objective *** a hyper-level supervisor,CLIA tries to design a fast and accurate identifier which,at the same time,can handle the effects of uncertainty as well as use this identifier to find the optimum design parameters of PHEV for improving the fuel ***–Based on the conducted numerical simulations,a set of interesting points are ***,it is observed that CI techniques provide us with a comprehensive tool capable of simultaneous identification/optimization of the PHEV operating *** is concluded that considering fuzzy polynomial programming enables us to not only design a proper identifier but also helps us capturing the undesired effects of uncertainty and measurement noises associated with the collected ***/value–To the best knowledge of the authors,this is the first attempt at implementing a comprehensive hybrid intelligent tool which can use a set of experimental data representing the behavior of PHEVs as the input and yields the optimized values of PHEV design parameters as the output.

关键词： Artificial immune system Fuzzy logic Knowledge acquisition Function approximation System identification Evolutionary computation

A Note on the Generalized and Universal Associated Legendre Equations

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Communications in Theoretical Physics 2018年第7期69卷 19-24页

作者： Keegan L.A.Kirk Kyle R.Bryenton nasser Saad School of Mathematical & Computational Sciences University of Prince Edward Island

A class of second-order differential equations commonly arising in physics applications are considered,and their explicit hypergeometric solutions are provided. Further, the relationship with the Generalized and Universal Associated Legendre Equations are examined and established. The hypergeometric solutions, presented in this work,will promote future investigations of their mathematical properties and applications to problems in theoretical physics.

关键词： Legendre 微分方程通用笔记应用程序理论物理数学性质

Auto-regressive multiple-valued logic neurons with sequential Chua’s oscillator back-propagation learning for online prediction and synchronization of chaotic trajectories

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International Journal of Intelligent Computing and Cybernetics 2015年第2期8卷 102-138页

Purpose–The purpose of this paper is to examine the structural and computational potentials of a powerful class of neural networks(NNs),called multiple-valued logic neural networks(MVLNN),for predicting the behavior of phenomenological systems with highly nonlinear *** are constructed based on the integration of a number of neurons working based on the principle of multiple-valued *** possess some particular features,namely complex-valued weights,input,and outputs coded by kth roots of unity,and a continuous activation as a mean for transferring numbers from complex spaces to trigonometric spaces,which distinguish them from most of the existing ***/methodology/approach–The presented study can be categorized into three *** the first part,the authors attempt at providing the mathematical formulations required for the implementation of ARX-based MVLNN(AMVLNN).In this context,it is indicated that how the concept of ARX can be used to revise the structure of MVLNN for online ***,the stepwise formulation for the simulation of Chua’s oscillatory map and multiple-valued logic-based BP are *** an analysis,some interesting characteristics of the Chua’s map,including a number of possible attractors of the state and sequences generated as a function of time,are ***–Based on a throughout simulation as well as a comprehensive numerical comparative study,some important features of AMVLNN are *** simulation results indicate that AMVLNN can be employed as a tool for the online identification of highly nonlinear dynamic ***,the results show the compatibility of the Chua’s oscillatory system with BP for an effective tuning of the synaptic *** results also unveil the potentials of AMVLNN as a fast,robust,and efficient control-oriented model at the heart of NMPC control ***/value–This study presents two innovative ***,the structure of MVLNN is mo

关键词： Real-time systems Learning Networked control Neural nets Chaotic systems Model predictive control