High‐quality factor Q  and elliptical cross‐section microcavity of small size are described. We present a numerical investigation of the performance of the elliptical microcavity. We design elliptical microcavities to control the emission rate of dipolar emitters and investigate how the ellipticity factor influences the Purcell and Q ‐factors. We demonstrate an enhancement of up to 16 × 10 ³ in the Purcell factor for TiO ₂ ‐based mirrors and 8 × 10

This work investigates the use of hydrogenated amorphous silicon (a-Si:H) as a high-refractive-index material for quarter-wave distributed Bragg reflectors (DBRs) in photonic applications. In comparison to Si3N4, a-Si:H enables enhanced optical confinement, broader omnidirectional reflectance, and improved figures of merit, including higher Purcell and quality factors, while minimizing mirror complexity. To evaluate the practical impact of these advantages, a theoretical comparison is conducted between Fabry–Pérot cavities based on a-Si:H/SiO2 and Si3N4/SiO2 DBRs, examining resonance shifts as functions of cavity refractive index (1.0–3.0) and temperature (0–250 °C). The numerical results indicate that Si3N4/SiO2 planar Bragg caviti

This study was aimed to evaluate the role of Potassium silicate, humic acid, and salicylic acid in both normal and Nano sizes in eliminating Tetranychus urticae Koch infestations on the eggplant cultivars Jawaher, Barcelona, and Iraq wonder. Potassium silicate was used by 2.5 ml/L and 5 g/L, humic acid 10 ml/L and 20 g/L and salicylic acid 0.1 g/L and 0.2 ml/L for ambient and Nano size respectively, the treatment plants were observed weekly after application to determine the population density of TSSM .The use of prior fertilizers reduces the population density of TSSM as compared to the control treatment in all three cultivars. SEM pictures revealed that the potassium silicate Nano capsule (PSNC), humic acid Nano capsule, and s

This study was aimed to investigates effect of herbicides and foliar nutrients of rice varieties yields (Anbar and Yasamin ). A field experiment was carried out at the rice research station at Al-Mishkhab, Najaf during two seasons 2020 and 2021. Factorial experiment Randomized Complete Block Design was used with 3 within replicates. Combinations included two rice varieties (12), with four weeding treatments (H1, H2, weed-free and control without weed control) with two concentrations of nano fertilizer (F1:21 g L^-1 and F2:10.5 g L^-1) as well as normal fertilization. The results showed that V1H4F3 had a significant superiority in reducing the density and the dry weight of the weeds, which gave the lowest value 84.3 an

The spaces surrounding the royal cemetery were chosen for the purposes of the practical study as they are an important historical, cultural, and urban landmark not only for the Adhamiya district, but at the level of Baghdad governorate. The research aimed to increase environmental awareness and strategic planning among the designers of urban green spaces and decision-makers in the design and implementation of these spaces to increase their efficiency and functionality. The research followed the comparative-descriptive-analytical approach to extract data for these spaces, which went through two phases before development in 2020 and after development in 2021 in the light of five tools for collecting and analyzing information: field

This study aimed to present a comprehensive approach to analyze the suitability of agricultural lands for wheat production. This study was conducted in the desert of Al-Mauthanaa Governorate, using the Analytic Hierarchy Process (AHP) model and compared with the Sys1993 method. Ten soil properties were selected for the study: soil texture, soil depth, slope, calcium carbonate content, Gypsum, soil salinity, exchangeable sodium percentage (ESP), organic matter, and stoniness. The results of using the Sys method showed that, approximately 6.1% of the total area of the study was classified as  S3 suitability class, covering an area of 98 hectares. around 31.1% of the total area of the study was classified as  limited suitability c

Salinity is an important abiotic factor that negatively impacts maize cultivation, especially in areas with saline soils. The present study evaluates the influence of salinity on the growth and physiological reactions of seven maize genotypes. Highly tolerant cultivars were excluded, while callus cultures were produced from moderately salt-tolerant cultivars and salt-sensitive genotypes on MS medium fortified with 3 mg/L 2,4-D and 0.5 mg/L Kin. The finding showed that high levels of salinity significantly decreased the callus weight. The moderate cultivars (Alfajr and Almaha) demonstrated a high salt tolerance index (STI) compared with sensitive genotypes (T1 and T6).  The ionic analysis indicated that genotypes T1