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- 저자 : Maham Aftab (검색결과 2 건)
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Modal Data Processing for High Resolution Deflectometry
Maham Aftab,James H. Burge,Greg A. Smith,Logan Graves,Chang-jin Oh,Dae Wook Kim 한국정밀공학회 2019 International Journal of Precision Engineering and Vol.6 No.2
In this paper, we present a modal data processing methodology, for reconstructing high resolution surfaces from measured slope data, over rectangular apertures. One of the primary goals is the ability to effectively reconstruct deflectometry measurement data for high resolution and freeform surfaces, such as telescope mirrors. We start by developing a gradient polynomial basis set which can quickly generate a very high number of polynomial terms. This vector basis set, called the G polynomials set, is based on gradients of the Chebyshev polynomials of the first kind. The proposed polynomials represent vector fields that are defined as the gradients of scalar functions. This method yields reconstructions that fit the measured data more closely than those obtained using conventional methods, especially in the presence of defects in the mirror surface and physical blockers/markers such as fiducials used during deflectometry measurements. We demonstrate the strengths of our method using simulations and real metrology data from the Daniel K. Inouye Solar Telescope (DKIST) primary mirror.
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Muhammad Nadeem,Maham Navida,Kashif Ameer,Aqsa Iqbal,Faiqa Malik,Muhammad Ather Nadeem,Hira Fatima,Aftab Ahmed,Ahmad Din 한국식품저장유통학회 2022 한국식품저장유통학회지 Vol.29 No.4
Watermelon (Citrullus lanatus) is commonly consumed by humans and widely available around the world. It has impressive nutritional properties, a rich phytochemical profile, and various claimed medicinal and health benefits. The major carotenoids in watermelon include lycopene, β-carotene, phytofluene, phytoene, lutein, and neurosporene. Lycopene (approximately 6,888 μg/152 g) is the major bioactive component in the fruit and it reportedly promotes several therapeutic effects, such as anti-cancer and anti-inflammatory activities etc. in humans and animals. Watermelon is also a good source of the amino acid citrulline, which is involved in production of arginine. Pre- and postharvest factors, including fruit sampling area, application of fertilizer, climatic factors, and genetic variability, are known to affect its bioactive compounds and nutrient concentrations. This review summarizes our current understanding of the watermelon phytochemical profile and the factors affecting its bioactivities and therapeutic effects.
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