Dendrobium Officinale is the rare Chinese herbal medicine. This paper will introduce its low cost grade determining system research mainly from the following two aspects: First of all, choose low cost CCD to do image capture, apply machine vision algorithm to extract the stem edge image, and automatically determine the stem diameter size and determine the uniformity coefficient of its size; Sec...

Abstract We study whether student-advisor gender and race composition matters for publication productivity of Ph.D. students in South Africa. consider all STEM graduating between 2000 2014, after the recent systematic introduction doctoral programs this country. investigate joint effects whole sample looking separately at sub-samples (1) white-white; (2) black-black; (3) black-white couples. fi...

Existing research has studied the underrepresentation of Black, Indigenous and People Color (BIPOC) students enrolling in graduating from science, technology, engineering, mathematics (STEM) fields college (e.g., Okahana et al., 2018; Rincón & Lane, 2017). However, there is a dearth that examines precollegiate factors impact whether student majors STEM field (Moakler Kim, 2014). This study ...

This metasynthesis review analyzes the possible influences impacting underrepresentation of People Color (POC) in science, technology, engineering, and mathematics (STEM) education. Underrepresented minoritized (URM) groups are defined this article as Black Latinx populations due to their low representation STEM education professions (National Science Foundation, 2019). explores at high school ...

New technologies in time-domain reflectometry offer a reliable means of measuring soil water content. Whether these same technologies can be used or adapted to estimate the water content of other porous media, such as the woody tissue of forest trees, has not been thoroughly addressed. Therefore, curves relating the apparent dielectric constant (K(a)) to volumetric water content (g cm(-3)) were...

Using data from roughly 27,800 undergraduate STEM (science, technology, engineering and mathematics) majors in the National Postsecondary Student Aid Study (NPSAS), this research examines the relationship between race/ethnicity, gender and non-traditional student characteristics and online course enrollment. Hispanic and Black STEM majors were significantly less likely, and female STEM majors s...

blackberry diversity is high in iran due to its wild and natural populations especially in south of caspian sea. however it has not been investigated before. the goal of this work was to evaluate some wild populations of black berry in mazandaran province of iran. at first, region and then location of blackberries plants identified and the traits of leaf, stem, spin, flower, fruit quantity and ...