Starting from the general principles of material cutting, with applicability to coal and overburden excavation using bucket wheel excavators (BWEs), this paper proposes another method for calculating drive power excavator by computer modeling. This approach required two steps. In first step, volume excavated one slewing movement boom a particular geometry was determined, time in open pit mine m...

To investigate the effect of deep foundation pit excavation on stability retaining structure, a subway station in city Jinan was selected as project, and FLAC3D-based three dimensional model developed for numerical simulation. The horizontal displacement axial force support, vertical column were studied compared to collected data from field. findings indicate that when is excavated, maximum def...

OBJECTIVES To assess focal lamina cribrosa (LC) defects in glaucoma using enhanced depth imaging optical coherence tomography and to investigate their spatial relationships with neuroretinal rim and visual field loss. METHODS Serial horizontal and vertical enhanced depth imaging optical coherence tomographic images of the optic nerve head were obtained from healthy subjects and those with gla...

Due to the special time–space and environmental effects of foundation pit, there are many unstable factors in construction process field test. The indoor model test can avoid uncertainties due its operability, which reduce interference with results improve accuracy In order further discuss force-bearing characteristics deformation laws loess pits’ support structure Northwest China, a large pit ...

BACKGROUND Excavated pulmonary metastasis are rare. We present two cases of excavated pulmonary nodules proved to be metastases from osteosarcoma and gallblader lymphoma. CASE PRESENTATION The first one is 39-year-old man in whom cholecystectomy made the diagnosis of primary non-Hodgkin's lymphoma of the gallbladder. He presented in chest CT scan excavated nodules that had been biopsied and c...

Sub-Saharan Africa is experiencing rapid urbanisation and many urban residents use groundwater where piped supplies are intermittent or unavailable. This study aimed to investigate long-term changes in groundwater contamination hazards and hand-dug well water quality in two informal settlements in Kisumu city, Kenya. Buildings, pit latrines, and wells were mapped in 1999 and 2013-2014. Sanitary...

cAMP regulation of the human thyrotropin-beta (TSH beta) gene cAMP was studied in two heterologous cell lines, a human embryonal kidney cell line (293) and a rat pituitary cell line (GH3). In 293 cells, human TSH beta gene expression was not stimulated by the adenylate cyclase activator forskolin or the cAMP analogue 8-bromo-cAMP (8-Br-cAMP). On the other hand, these agents induced human TSH be...

the determination of the ultimate pit limit (upl) is the first step in the open pit mine planning process. in this stage that parts of the mineral deposit that are economic to mine are determined. there are several mathematical, heuristic and meta-heuristic algorithms to determine upl. the optimization criterion in these algorithms is maximization of the total profit whilst satisfying the...

Metallography, SEM-EDS, and Raman Micro-Spectroscopy analysis were conducted on bronze dirk, sword, mirror excavated from the pit tomb No. 1-1 at 12th Point of Osong Site in Cheongju to study manufacturing techniques corrosion properties. The sword are judged be binary alloys Cu(79.16∼79.89 wt%)-Sn (19.12∼20.34 wt%). microstructure is a cast structure composed δ phase (α+δ) eutectoid, no heat t...