1. Abstract While using unmanned systems in combat is not new, what will be new in the
foreseeable future is how such systems are used and integrated in the civilian space. The …

A forced landing is an unscheduled event in flight requiring an emergency landing, and is
most commonly attributed to engine failure, failure of avionics or adverse weather. Since the …

This paper describes the current status of a program to develop an automated forced landing
system for a fixed-wing Unmanned Aerial Vehicle (UAV). This automated system seeks to …

… study included pillar strength, the geometry of entry and pillar, and … pillar safety factor (pillar
strength divided by pillar stress), their method can be used to design different types of pillar …

The ability to perform autonomous emergency (forced) landings is one of the key technology
enablers identified for UAS. This paper presents the flight test results of forced landings …

… of coal pillar system behaviour and for signalling out specific critical and practical aspects of
coal pillar … of civil engineering bearing capacity theory to coal pillar foundation performance. …

… A field engineering test of the surrounding rock based on no-pillar mining technique with
automatically formed gob-side entry retaining shows that due to the support from the constant-…

… -pillar mining isthe most important method of coal extraction in South Af~ican underground
coal mines, and advocates that pillar … must be based on s~und eng~nee~in? principles and ~…

… For multi-pillar caverns, the mechanism of collapse involves progressive failure as loads …
pillars to adjacent pillars. Consequently the failure initiated by the collapse of most critical pillar …

… that pillar failure for system instability is governed by both the strength of the pillars and
the load acting on the pillars. There are several methodologies to evaluate pillar failure for …