The ultimate tensile strength of 250 MPa, 0.2% proof stress of 150 MPa, and fracture strain of 10% at the as-cast condition for Al-1.5Mn-X alloys, were objective in this development. As ternary elements, Ca, Mg, Ti and Zn were initially chosen and the values in ¦Mk of the s-orbital energy level in alloys were adjusted to be less than 0.017. Their proof stress and fracture strain increased and decreased as ¦Mk increased, respectively. The composition of promising alloy was decided to Al-1.5Mn-2.4Mg with ¦Mk of 0.029 on the basis of the relation between tensile properties and ¦Mk. This as-cast alloy showed the · uts · 0.2 and ¾ f of 270, 135 MPa and 18% showing excellent corrosion resistance in the NaCl solution, which resulted in the approximate satisfaction of the objective. The interaction between the proof stress and dislocation density or hindrance for dislocation migration at the constant strain could be explained by ¦Mk, which might lead to the indication of solid solution hardening level using this parameter for Al-1.5Mn-X ternary alloys.
This paper seeks to determine which physical elements of privately owned public spaces affect users' impressions, which characteristics of these elements are noticed, and what impressions they cause. The study is based on a caption evaluation and semantic differential survey of 12 public spaces in the center of Tokyo. Ten participants were surveyed for each space, and 1494 of the obtained entries were analyzed. The semantic differential survey was then cross-referenced with density measures to evaluate the effect of physical elements' densities on participants' impressions.It was found that the physical elements that caught users' attention were greenery, street furniture, the building, the sidewalk and the space itself. From all of the elements, tree coverage density was the best predictor of desire to stay and rest activities in the space. A logistic regression analysis of each activity by tree density is also provided.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.