منابع مشابه
On-line monitoring of methane in sewer air
Methane is a highly potent greenhouse gas and contributes significantly to climate change. Recent studies have shown significant methane production in sewers. The studies conducted so far have relied on manual sampling followed by off-line laboratory-based chromatography analysis. These methods are labor-intensive when measuring methane emissions from a large number of sewers, and do not captur...
متن کاملMultiobjective design of sewer networks
The sewer layout in flat areas significantly influences the construction and operational costs as well as reliability of the network performance. To find an optimum design of sewer networks for flat areas, this study presents a multi-objective optimization problem with the objective functions of 1- the cost and 2- the reliability. The reliability criterion is defined as the effect of a clogging...
متن کاملRemnants of sewer gas.
Going home after a housing co-op meeting, a friend offered to walk me to the bus stop. ‘‘I’m going to show you something’’ he said ‘‘and you won’t believe you’ve passed it so many times and never seen it before’’. As we rounded a corner he halted and I saw what I thought to be the base of a lamppost. Then I looked up, having to tilt my head back to see that this ‘lamp post’ was headless and at ...
متن کاملSwimming up a Sewer
Large parts of it would be obviously erot1^? ?ertain types of sexual deviant?whatever!s ^tellectual reviewers may rave but the 1 P s'?n is of a far from deliberately erotic w0^: If this be typical life in Brooklyn (c?"^ . , Reviewers quoted swear it is), then Brooklyn. Certainly human nastiness ot tnis P Portion is quite conceivable. A massive in ? twentieth-century democratic civi is Certainly...
متن کامل17 Sewer Robotics
The usage of tethered, remotely controlled robot platforms in sewer pipes has become widely accepted. Research and development in engineering have moved the original application field of merely visual inspection to manipulative tasks such as the actual repair of pipe sections, installation of cable, e.g. for communication. Despite all engineering advances in the mechanical design of the platfor...
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ژورنال
عنوان ژورنال: The Lancet
سال: 1896
ISSN: 0140-6736
DOI: 10.1016/s0140-6736(01)75999-5