Drill and blast is the most cost-effective excavation method for underground construction, however, vibration noise, induced by blasting, have been consistently reported as problems. Cut blasting has widely employed to reduce blast-induced problems during excavation. We propose that large hole boring using state-of-the-art MSP (Multi-setting smart-investigation of ground pre-large boring) machi...

INTRODUCTION The issue of increasing population is a problem prevailing in all urban cities in the world. Urban congestion in Hong Kong is particularly amplified by its hilly terrain. A clear trend can be seen in recent decades all over the world with networks of transportation as well as provisions of utilities services seeking underground solutions, which in some cases is the only feasible op...

For rotating-tool machining, such as milling, line boring, and cylinder boring, the tool rotation causes the machining force on each tooth to rotate repetitively relative to the inertial coordinate frame. This is quite different than stationary-tool machining, such as turning or boring with a stationary boring bar, in which the force directions are fixed relative to the inertial frame. Although...

Host plants are used by herbivorous insects as feeding or nesting resources. In wood-boring insects, host plants features may impose selective forces leading to phenotypic differentiation on traits related to nest construction. Carpenter bees build their nests in dead stems or dry twigs of shrubs and trees; thus, mandibles are essential for the nesting process, and the nest is required for egg ...

The new Austrian tunnelling method (NATM) and tunnel boring machine (TBM) are methods for excavating underground spaces. NATM construction has noise vibration problems, excavation using TBM the disadvantage of high initial cost is limited by ground conditions. A parallel been developed to overcome these limitations. However, research on lacking, it crucial identify applicability in advance appl...

Parallel simulation is emerging as the dominant technique for studying parallel computers. However, the interconnection networks of these machines can be modeled at many different levels of abstraction, allowing researchers to trade off accuracy and performance. In this paper, we use the Wisconsin Wind Tunnel, a parallel simulator for cache-coherent shared-memory machines, to study the trade-of...

The fast development of wireless sensor networks and MEMS make it possible to set up today real-time wireless geotechnical monitoring. To handle interferences and noises from the output data, Kalman filter can be selected as a method to achieve a more realistic estimate of the observations. In this paper, a one-day wireless measurement using accelerometers and inclinometers was deployed on top ...