This paper describes development of a three somites earthworm type mobile inspection robot which is able to move in long pipes. We have many small diameter pipes which are gas or water pipes for individual or corporate houses and boilers or hot water pipes for industries. They are settled in the ground horizontally or in the narrow spaces vertically and some of them are covered by casings or ha...

This article utilizes the experimental method to investigate the thermal performance of heat sinks with one and two pairs of embedded heat pipes. A heat sink with embedded heat pipes transfers the total heat capacity from the heat source to both the base plate and heat pipes, and then disperses heat into the surrounding air via the forced convection. The heat transference from base plate to fin...

The structural response and failure mechanisms of 35 used concrete sewer pipes are investigated by means a combined experimental–numerical approach, whereby specific attention focuses on determining the effect biochemical attack. Accordingly, degree degradation inner outer surfaces is carefully analysed visual inspection, subsequently categorized in 6 different surface condition classes. type a...

One approach to solve the end to end (E2E) quality of services (QoS) problem of multimedia services delivery over multi-domain IP heterogeneous network infrastructures in a scaleable manner is the establishment of long term QoS enabled aggregated pipes. To allow dynamism, the actual service invocation of these pipes can be made as a separate action from the pipes subscription. This paper propos...

The results of a metallographic study of grey cast iron water pipes are reported. These pipes had been installed between 1885 and 1973 in eight different water systems. Each pipe had been extracted during scheduled maintenance or failure repairs to provide data for a larger study to produce a methodology for determining the residual life of grey cast iron pipes. This metallographic study was co...

As the urban population increases and level of social life advances, amount wastewater originating from houses, institutions industries as well. It is necessary for infrastructure systems in settlements to be sustained under healthy conditions. Since subsequent repair difficult, appropriate selection materials used these importance. Concrete pipes are widely sewerage systems. In present study, ...

The in situ spraying method is widely used because of its advantages as a trenchless pipeline repair technology, including fast construction speed and close bonding between the lining layer reinforced concrete pipe. However, current research on high-performance spray materials, bearing capacity pipelines before after repair, failure modes two interfaces insufficient. Through laboratory tests de...

Abstract: In this paper we extend the theory of Radio Frequency (RF) propagation as it relates to propagation within metal circular pipes. This work is motivated by a need to understand the operation of UHF Radio Frequency IDentification (RFID) systems when the tags are placed within the pipes. These circular pipes are shown to be similar to metal tube waveguides which are hollow. We derive the...