The Influence of Augmented Reality Technology on the Learning Interest, Achievement of Learning Goals and Cognitive Load of Middle School Students

In order to test the influence of augmented reality technology on the learning interest achievement of learning goals and cognitive load the instruction of topographic map was taken as an example for experimental study This paper selected 427 students from 8 classes of Grade one who all come from Zhantan Middle School in Xindu District of Chengdu as experimental samples set two classes with similar level in learning as one group the one is the experimental class and the other is the control class and formed 4 groups in total The experimental classes adopted AR three-dimensional videos as teaching aids to give new lessons and the control classes adopted traditional two- dimensional videos and then the students learning interest level achievement of learning goals and cognitive load were measured The results showed that the application of AR technology in teaching could improve students learning interest and achievement of learning goals but had no effect on reducing cognitive loa

Roll-to-Roll nanoimprint lithography of polyethersulfone ultrafiltration membranes and fouling mitigation effects

Previous research has shown that embossing commercial polyethersulfone ultrafiltration membranes with sub-micron surface patterns increases the critical flux and reduces the rate of cake layer formation when filtering model solutions. These membranes were created using traditional nanoimprint lithography (NIL), by which a lithographically defined silicon wafer is pressed against a membrane at elevated temperatures and pressures. In order for this technological advance to be translated into commercial application, the embossing must be done using a high-throughput manufacturing method. The focus of ongoing research has been to move the imprinting process into a roll-to-roll process. In this process, the membrane and mold are fed through a pair of rollers, and at the center nip of the rollers, the membrane is pressed into the periodic grooves of the mold. There are two ways of controlling the pressure applied by the rollers. The first is to set a distance between the rollers (roll gap), such that a percent reduction in thickness of the membrane defines pressure. The second is to have a moving roll gap where a constant force is applied to the rollers, thus a constant pressure to membrane. We have found that both methods successfully transfer patterns to the membrane. Preliminary results have shown that pattern transfer can be obtained at room temperatures, with permeance (though somewhat reduced) being retained by the membrane. Please click Additional Files below to see the full abstract

Description of a Sulfitobacter Strain and Its Extracellular Cyclodipeptides

A marine bacterium M44 was separated from 30 m deep seawater in the East China Sea (26° 28.3′ N 122° 29.0′ E) in 2006. 16S rDNA gene sequence comparison showed that the strain M44 was a member of the genus Sulfitobacter and highly similar to KMM 3554T. A series of experiments demonstrated that this strain M44 had many distinctive characteristics: its cells were gram-negative and mesophilic; its colonies were slightly yellowish, round, convex, and smooth; and it could grow at 10–28°C, pH 6.0–10.0, and in the presence of 0–12.5% (w/v) NaCl; the optimum growth conditions were 25°C and pH 7.0, and the optimum Na+ concentration was 2.5%. In addition, strain M44 contained 18 : 1 ω7c, 11 methyl 18 : 1 ω7c and 16 : 0 fatty acids as major fatty acids, and the genomic DNA G+C content was 58.04 mol%. According to our results of the secondary metabolites, six cyclodipeptides were isolated from the strain M44, which were Cyclo (Val-Leu), Cyclo (Phe-Val), Cyclo (Phe-Leu), Cyclo (Leu-Ile), Cyclo (Phe-Ile), and Cyclo (Trp-Pro). It is the first study of secondary metabolites isolated from this genus