Asymmetric Hydrosilane Reduction of Ketones Catalyzed by an Iridium Complex Bearing a Hydroxyamide‐Functionalized NHC Ligand

An enantioselective hydrosilylation of prochiral ketones was achieved by using a catalytic amount of the readily accessible and air‐ and moisture‐stable iridium complex [IrCl(cod)(NHC)] at room temperature.     

The role of cross-racial/ethnic friendships in social adjustment.

The purpose of this study was to examine the frequency and correlates of cross-racial/ethnic friendships. The sample consisted of 509 (188 African American, 135 European American, 106 Asian American, and 80 Latino) children in 4th grade from 39 classrooms in several public elementary schools. The authors hypothesized that (a) the frequency of cross-racial/ethnic friendships would be different across races/ethnicities and (b) these friendships would be uniquely associated with social adjustment (relational inclusion, leadership). Results showed that European American children displayed a higher frequency of cross-racial/ethnic friendships than African American children. Compared with the sample average, Latino children exhibited a lower frequency of these friendships. Further, findings revealed that children who formed cross-racial/ethnic friendships were more likely to be viewed as relationally inclusive and possessing leadership skills by teachers. Overall, the results showed that cross-racial/ethnic friendships were associated with positive developmental outcomes and that future studies that examine how these friendships are formed and maintained, and how these pathways are related to social adjustment, are warranted. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

3D reconstruction considering calculation time reduction for linear trajectory shooting and accuracy verification with simulator

Artificial Life and Robotics - Photogrammetry is a three-dimensional (3D) reconstruction from images. In photogrammetry, when each image captures the features of the target object for 3D...     

Sediment penetration performance of a portable underwater robot for core sampling

As described in this paper, we investigate the sediment penetration performance of a portable underwater robot with a helical screw pipe using marine thrusters with limited force. First, we derive a mathematical model based on an empirical and simple method using the undrained shear strength of cohesive soil to provide a rough estimate of maximum penetration depths. Then, we perform numerical analysis for estimating the maximum depth of sediment penetration and for designing a sampling pipe. Additionally, we use experimentation to investigate the relation between the penetration depth of the helical screw pipe and the force of marine thrusters mounted on the portable underwater robot. After testing the penetration performance in a water tank, we conduct a field experiment at Lake Biwa and obtain results of the penetration depths. The maximum penetration into the lake sediment is at least 0.30 m. The results demonstrated the possibility of using the derived mathematical model to make a rough estimation of the maximum penetration depth for clay sediments. Additionally, we can use non-powerful thrusters equipped with small autonomous underwater vehicles (AUVs) and remotely operated vehicles (ROVs) for sediment sampling. The proposed method is also applicable for the installation of underwater sensors using small AUVs and ROVs.