Although pairs of species often interact over broad geographic ranges, few studies have explored how interactions vary across these large spatial scales. Surveys along 1500 kilometers of the Pacific coast of North America documented marked variation in the frequency of predation by the snail Nucella canaliculata on the intertidal mussel Mytilus californianus. Laboratory rearing experiments sugg...

Abstract Understanding the stress state before and after an earthquake is essential to study how on faults evolves during seismic cycle. This integrates wellbore failure analysis, laboratory experiments, edge dislocation model Chi‐Chi earthquake. The post‐earthquake in‐situ observed along boreholes of Taiwan Chelungpu‐fault Drilling Project (TCDP) heterogeneous due lithological variations. Alon...

The fiber reinforced plastics (FRPs) are being used widely in the most diverse applications ranging from the aerospace to the sports goods industry. Drilling in particular is important to facilitate the assembly operations of structurally intricate composite products. The drilling of holes in FRPs leads to drilling induced damage which is an important research area. The researchers worldwide ha...

Laser drilling has emerged in the last five years as the most widely accepted method of creating microvias in high-density electronic interconnect and chip packaging devices. Most commercially available laser drilling tools are currently based on one of two laser types: far-IR CO2 lasers and UV solid state lasers at 355 nm. While CO2 lasers are recognized for their high average power and drilli...

Drilling engineering is not only a systematic engineering that involves several workcategories, work procedures,intersectant and continuous operation, but also is a concealed underground engineering. There are uncertain factors in drilling projects, which have the characteristics of high investment and risk. On the basis of the overall analysis of the two factors of geology and engineering, the...

Based on a large number of drilling and laboratory test data in Weibei loess tableland area, the correlation three conventional physical mechanical indexes this such as void ratio, compression coefficient collapsibility coefficient, was analyzed studied. The results show that ratio is positively correlated with between higher. obvious when compressibility soil small, but there no large.

Brookhaven National Laboratory was requested to conduct a literature survey for the best available cement to use in the proposed casing patch as part of the Geothermal Drilling Organization (GDO) project on remediation of deformed casings. A total of 50 wells has been identified with deformed production casing in Unocal’s portion of The Geysers geothermal field. Reduced internal diameter and ca...

This paper presents an application of an ontology based system for automated text analysis using a sample of a drilling report to demonstrate how the methodology works. The methodology used here consists basically of organizing the knowledge related to the drilling process by elaborating the ontology of some typical problems. The whole process was carried out with the assistance of a drilling e...

The study to evaluate the toxicity of used drilling muds (drilling wastes) and their impact on gill structure of the post larvae of tiger prawn Penaeus monodon has been done. The results showed that the 96 h LC50 of used drilling muds ranged from 30740 and 78271 ppm SPP. All toxicity values considered to be above the standard of Indonesian government (LC50≤30000 ppm SPP). Histological observati...

OBJECTIVES The purpose of this study was to evaluate the temperature change during low-speed drilling using infrared thermography. MATERIAL AND METHODS Pig ribs were used to provide cortical bone of a similar quality to human mandible. Heat production by three implant drill systems (two conventional drilling systems and one low-speed drilling system) was evaluated by measuring the bone temper...