Excavators are high power machines used in the mining, agricultural and construction industry whose principal functions are digging (material removing), ground leveling and material transport operations. During the digging task there are certain unknown forces exerted by the bucket on the soil and the digging operation is repetitive in nature. Automation of the digging task can be performed by ...

The breadth of an animals’ ecological niche is circumscribed by its morphology, performance, and behavior, 3 factors that can ultimately affect fitness. We investigated potential behavioral and performance adaptations to roost making, a life-history trait associated with high fitness in the insectivorous bat Lophostoma silvicolum. Males of this species use their teeth to excavate roosts in acti...

The deep rock masses show a different mechanical behavior compared with the shallow rock masses. They are classified into alternating fractured and intact zones during the excavation, which is known as zonal disintegration. Such phenomenon is a great disaster and will induce the different excavation and anchoring methodology. In this study, a 3D geomechanics model test was conducted to research...

The inverse kinematics problem of a reclaimer which excavates and transports raw materials in a raw yard is investigated. Because of the geometric feature of the equipment of which scooping buckets are attached around a rotating disk, kinematic redundancy occurs in aktermining joint variables. Link coordinates are introduced following the Denavit-Hatenberg representation. For a given excavation...

in soft soil areas, equal-length piles are often adopted in the retaining system. a decrease in the bending moment value borne by the retaining structure along the pile depth (below the excavation bottom), leads to an inadequate use of the pile bending capacity near the pile bottom. this paper presents retaining systems with long and short pile combinations, in which the long piles ensure integ...

We propose a methodology to automatically generate robot actions for tasks that cannot be abstracted into a geometrical basis because ofed into a geometrical basis because of complex interaction between the robot and the world. Our method considers such a task, robotic excavation, by seeking to satisfy constraints posed by the robot and the world to generate “plans” that optimize an arbitrary c...

In 1993 the Early Bronze Age workshop and habitation site of Goltepe and its associated tin mine, Kestel, became the newest members of the Oriental Institute excavation roster. Excavations at Goltepe during the 1993 season were directed by K. Ashhan Yener and were designed to illuminate the origins, formation, and organization of tin production in the central Taurus Mountains of Turkey. Discove...

In June of 2012, I commenced the weighty task of searching the far reaches of Phoenix Art Museum's digital storage spaces to import images into a recently acquired collection management system, The Museum System (TMS). Before my newly created position as Visual Resource Coordinator began, each department generated and stored assets with their own organizational system in digital silos. I excava...

Data from archaeological excavation is suitable for computerization although they bring challenges typical of working in non-scientific subjective areas. We present some issues with regard data modeling in the specific field of archaeology.

Background: Pulmonary nodular excavation should firstly evoke tuberculosis or necrosis broncho-pulmonary tumor, particularly: epidermoid carcinoma. The case discussed here illustrated these difficulties in patients with rheumatoid arthritis (RA). Case Presentation: A 63-year-old woman was presented with a-three-year history of RA and a recent discovery of an excavated pulmonary nodule. Initi...