PURPOSE This is a report of a case of choroidal excavation accompanied by polypoidal choroidal vasculopathy (PCV) and retinal pigment epithelium detachment (PED). METHODS A 57-year-old Japanese woman who had begun complaining of metamorphopsia in her left eye 7 months earlier underwent spectral-domain optical coherence tomography (SD-OCT), fluorescein angiography (FA), and indocyanine green a...

In automating an excavation task it is required to deene a nominal trajectory for the motion of the excavator tool, so that its motion can be programmed and controlled. During the motion, the excavating tool (the bucket for instance, in the case of a loader), experiences the excavating forces that must be overcome by the active forces for moving the bucket, in order for the excavation to take p...

Recent studies have increasingly investigated construction methods for tunnel excavation because of growing underground space development. Although the New Austrian tunneling method (NATM)—a representative method—can be applied to various ground conditions, as well having good constructability and economic feasibility, it suffers from problems such vibration noise. By contrast, using a boring m...

Pose measurement of coal mine excavation equipment is an important part roadway excavation. However, in the underground mining mine, there are some influencing factors such as low illumination, high dust and interference from multiple equipment, which lead to difficulty position pose roadheader with accuracy poor stability. A combination positioning method based on machine vision optical fiber ...

We propose a methodology to automatically generate plans for a robot excavator like a bucket loader or a backhoe. The task is formulated as one of constrained optimization in an action space that is spanned by the parameters of a prototypical digging plan. We show how geometric and force constraints are imposed on the action space to build the set of feasible plans, and discuss methods to optim...

with the world as excavation. In order to effectively plan its actions, our robot excavator requires a method that allows it to predict the resistive forces experienced as it scoops soil from the terrain. In this paper we present methods for a robot to predict the resistive forces and to improve its predictions based on experience. We start with a simple analytical model of a flat blade moving ...

Abstract This paper seeks to do justice the often complex, messy, and sometimes ambiguous meaning making practices of archaeological field work. Taking recent adoptions assemblage theory sensory studies in archaeology as an angle arrival, I contribute here discussions on self-reflective interpretive archaeology. Drawing empirical encounters with troweling backfilling at Ardnamurchan Transitions...

The growing demand for transportation tunnels in densely populated urban areas has led to the widespread adoption of twin tunnel configurations contemporary infrastructure projects. This research focuses on investigating complex interaction between soil, structures, and excavation tunnels. study employs boring machine (TBM) method utilizes two-dimensional numerical modeling based finite element...