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The purpose of this paper is to describe the design and development of “Pylon-Climber”, a pole climbing robot (PCR) for climbing along the corner columns of electricity pylon and assisting the electricians to complete maintenance tasks.

Introduces a PCR that is composed of a simple climbing mechanism and two novel grippers. The gripper consists of two angle-fixed V-blocks, and the size of V-block is variable. The clamping method of the angle bar meets the requirement of the force closure theorem. The whole design adopts symmetrical design ideas.

The developed prototype proved possibility of application of PCRs for inspection and maintenance of pylon. The novel gripper can provide enough adhesion force for climbing robot.

The robot is successfully tested on a test tower composed of different specification steel angles, oblique ledges and overlapping steel struts.

Design and development of a novel climbing assistive robot for pylon maintenance. The robot is able to climb along the column of electricity pylon and pass all obstacles. The gripper can reliably grasp the angle bar with different specification and overlapping steel struts from multiple directions.

This study aims to investigate the relationship between leadership and teacher professional learning considering two mediating variables – teacher trust and teacher agency.

The study utilized structural equation modeling in analyzing the responses from 1,654 secondary public teachers from 43 schools in the Philippines.

Leadership does not have a direct relationship with teacher professional learning. The established relationship of leadership and professional learning from literature exists through the mediation of teacher trust and teacher agency.

The results point out that school leaders must affect teacher trust and teacher agency to influence the engagement of teachers to professional learning. Contrary to what has been accepted in educational management that leaders can directly impact teachers, the findings of this study dictate that the full effects of leadership are coursed through mediating pathways.