1,644 research outputs found
R from Zero to Hero (Arabic)
No full textThis is a course designed by Batool Almarzouq and delivered in JeelAIDM. All Materials are licensed under CC-BY license. CC-BY license means you can re-use, modify and build upon the materials with attribution to the source. The course is delivered over six weeks, with two sessions each week, each lasting two hours.
Week
Session
1
Introduction to R and Open Science
1
Project Management
2
R Markdown
2
GitHub in RStudio
3
Tidydata
3
Tidyverse
4
ggplot2 Part 1
4
ggplot2 Part 2
5
YAML in R Markdown
5
Blogging in R
6
Reproducibility with renv
6
Create your first R package!
The Slides are accompanied by live coding in this GitHub repository associated.The author acknowledges JeelAIDM for making the materials ope
Effect of financial development and institutional quality on the environmental degradation in developed and developing countries
No full textEnvironmental pollutants have become a dreadful problem and burning issues for the present world irrespective of a country who is responsible for it. The objective of the study is to investigate impact of financial development and institutional quality on environmental degradation. The study is based on panel data for developing and developed countries over the time of 1996-2016. For the empirical analysis fixed effect and the random effect is carried out. Results show that institutional quality, economic growth, foreign direct investment, gross primary enrolment, and industrial growth have significant positive effect on corban emissions whereas financial development, population growth, trade openness, urban population and R&D expenditures have significant negative effect on corban emissions. One percent point increase in the index of institutional quality leads towards 0.006 percent points increase in the level of CO2 emissions. One percent point increase in the economic growth lead to increase the CO2 emissions by 0.39 percent points. One percent point increase in inflows of foreign direct investment increase the level of CO2 emissions by 0.016 percent points. One percent point increase in industrial growth leads to a 0.38 percent points increase in the level of CO2 emissions. Furthermore, one percent point increase in the index of financial development leads to 0.05 percent points decrease in the level of CO2 emissions. One percent point increase in urban population leads to almost 0.05 percent points fall in the level of CO2 emissions. Finally, one percent point rise in R&D expenditures leads to decrease in the level of CO2 emissions by 0.068 percent points
Design of SkSP-R Variables Sampling Plans
No full textIn this paper, we present the designing of the skip-lot sampling plan including the re-inspection called SkSP-R. The plan parameters of the proposed plan are determined through a nonlinear optimization problem by minimizing the average sample number satisfying both the producer's risk and the consumer's risks. The proposed plan is shown to perform better than the existing sampling plans in terms of the average sample number. The application of the proposed plan is explained with the help of illustrative examples.En este artículo, se presenta el diseño de un plan de muestreo de lotes incluyendo reinspección llamado SkSP-R. Los parámetros del plan propuesto se determinan a través de un problema de optimización no lineal que minimiza el número de muestras promedio óptimo que satisface el riesgo del productor a un nivel de calidad aceptable y el riesgo del consumidor a un nivel de calidad límite. El plan propuesto se desempeña mejor que otros planes de muestreo existentes en términos del número de muestras promedio. Se presenta una aplicación del plan propuesto con la ayuda de tabulados
Erratum: Cloaking using anisotropic multilayer circular cylinder (AIP Advances (2020) 10 (095312) DOI: 10.1063/5.0012769)
No full textCo-author Mehwish Nisar should have had an additional affiliation noted in the byline of our original manuscript.1 The correct affiliations for this manuscript are as listed above
Leveraging Communities to Advance R and Open Science (Arabic only)
No full textA talk in Arabic under the title "Leveraging Communities to Advance R and Open Science" in JeelAIDM. It can also be accessed through this link
Electromagnetic scattering by Ag and Au spheres
No full textThe scattering and absorption of light by small particles is a fundamental issue in electromagnetic (EM) theory, which applied in surface plasmonics, Surface Enhanced Raman Scattering (SERS), Optical Tweezers (OT). Gold and silver nanostructures are the most frequently used metals in either nanoscience or nanotechnology. In order to get the suitable models, the authors compare the Lorentz-Drude (LD) model, the Double Critical Points (DCP) model, and the total physical model from 200nm∼1000nm. We have selected the DCP model as the dielectric function. Give the new method to calculate the spherical Bessel function which can calculate the BF with small and complex parameter. Later, base on the Rayleigh and Mie scattering theory, the authors compare the EM scattering problem with Comsol, getting the scattering cross section (SCS) and absorption cross section (ACS) coefficients, the E-field inside and outside the sphere. We have used primer factorial method to calculate the Winger-3j function, calculate the Gaunt coefficients for the single sphere scattering. Base on the recurrence relations for the three-Dimension scalar and vector addition theorem, the authors calculate the element of the scalar and the vector translation matrix. After this, give the detail about the T-matrix. This allows us to find the E-field of a random incident wave for the scattered field. We have deeply investigated the extended Mie theory, give the T matrix of multi-sphere scattering, and compare it with the recurrence method. At last we developed the c++ code of multi-sphere EM scattering with plane incident wave
2-Chloro-5-nitroaniline
No full textThe molecule of the title compound, C6H5ClN2O2, is close to being planar (rms deviation = 0.032 Å for all non-H atoms), with a maximum deviation of -0.107 (3) Å for an O atom. In the crystal structure, intermolecular N-H...O and N-H...N interactions link the molecules into a three-dimensional network. Key indicators: single-crystal X-ray study; T = 173 K; mean σ(C–C) = 0.002 A°; R factor = 0.023; wR factor = 0.061; data-to-parameter ratio = 11.8
R-Norm Entropy and R-Norm Divergence in Fuzzy Probability Spaces
No full textIn the presented article, we define the R-norm entropy and the conditional R-norm entropy of partitions of a given fuzzy probability space and study the properties of the suggested entropy measures. In addition, we introduce the concept of R-norm divergence of fuzzy P-measures and we derive fundamental properties of this quantity. Specifically, it is shown that the Shannon entropy and the conditional Shannon entropy of fuzzy partitions can be derived from the R-norm entropy and conditional R-norm entropy of fuzzy partitions, respectively, as the limiting cases for R going to 1; the Kullback–Leibler divergence of fuzzy P-measures may be inferred from the R-norm divergence of fuzzy P-measures as the limiting case for R going to 1. We also provide numerical examples that illustrate the results
Electromagnetic scattering by metal spheres
No full textThe scattering and absorption of light by small particles is a fundamental issue in electromagnetic (EM) theory, which is applied in surface plasmonics, Surface-Enhanced Raman Scattering (SERS), Optical Tweezers (OT). When the wavelength ~ sphere radius, need to use Mie theory to calculate the E field. A fast and accurate method to calculate the field is very important. Especially for the large order of Vector Translation coefficient
Century-long reconstruction of gridded phosphorus surplus across Europe (1850–2019)
No full textPhosphorus (P) surplus in soils significantly contributes to the eutrophication and degradation of water quality in surface waters worldwide. Despite extensive European regulations, elevated P levels persist in many water bodies across the continent. Long-term annual data on soil P surplus (the difference between P inputs and outputs) are essential to understand these levels and guide future management strategies. This study reconstructs and analyzes the annual long-term P surplus for both agricultural and non-agricultural soils from diffuse sources across Europe at a 5 arcmin (≈10 km at the Equator) spatial resolution from 1850 to 2019. The dataset includes 48 P surplus estimates that account for uncertainties arising from different methodological choices and coefficients in major components of the P surplus. Our results indicate substantial changes in P surplus magnitude over the past 100 years, underscoring the importance of understanding a long-term P surplus. Specifically, the total P surplus across the EU 27 has tripled over 170 years, from 1.19(±0.28) kg ha−1 of physical area in 1850 to around 2.48(±0.97) kg ha−1 of physical area per year in recent years. We evaluated the plausibility and consistency of our P surplus estimates by comparing them with existing studies and identified potential areas for further improvement. Notably, our dataset supports aggregation at various spatial scales, aiding in the development of targeted strategies to address soil and water quality issues related to P. The P surplus reconstructed dataset is available at https://doi.org/10.5281/zenodo.11351027 (Batool et al., 2024).</p
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