The ignition of firedamp by permissible explosives is assessed by means of gallery testing conducted by the Bruceton up-and-down method. Six test series were made in order to analyze the influence of several blasting practices in long-holes coal blasting, namely: use of slotted PVC pipes, detonating cord, salt cartridges and double (top and bottom) initiation. The parameters of the distribution...

We propose new visualization techniques for the user behaviors when using search engine results pages. Our visualization method provides an overview of a user’s actual visual behavior using the logs for eye-movement data and browser link-clicking. We also report on the eye-movement data collected from user experiments.

The aim of this study was to determine the effect metal surface roughness on mechanical performance titanium-unidirectional C/PEKK composite joints. Various morphologies were obtained by grit-blasting titanium using different blasting pressures. Subsequently, test coupons manufactured co-consolidating in an autoclave. Topographical characterization and evaluation interfacial fracture toughness ...

ability to produce differentiated cell types and additional stem cells. Cells capable of proliferation and neurogen-*Division of Developmental Biology National Institute for Medical Research esis in such a paradigm, but which fail to self-renew, are best termed progenitor cells rather than stem cells. The Ridgeway, Mill Hill London NW7 1AA Detailed analyses demonstrating self-renewal have been ...

A mathematical model is used to investigate the effectiveness of the chemotherapy drug Topotecan against neuroblastoma. Optimal control theory is applied to minimize the tumor volume and the amount of drug utilized. The model incorporates a state constraint that requires the level of circulating neutrophils (white blood cells that form an integral part of the immune system) to remain above an a...

Portable electronic devices such as notebook computers, PDAs, cellular phones, etc., are being widely used, and they increasingly need cheap, efficient, and lightweight power sources. Fuel cells have been proposed as possible power sources to address issues that involve energy production and the environment. In particular, a small type of fuel-cell system is known to be suitable for portable el...

Blasting operations generate seismic effects in underground mines. These effects apply additional dynamic loads on the support system, which should bear both static and dynamic loads. Static loads are caused by the weight of the superincumbent strata, while dynamic loads occur as a result of blasting in the mining area. Identification of the origin and determination of the support system behavi...

Surface cleaning processes are needed in different life cycle phases of technical products. They are important elements in manufacturing and in maintenance during usage as well as in recycling and remanufacturing. To meet the increasing requirements in product durability and functionality, the usage of compound materials and functional coatings becomes over more important. In this regard surfac...