1,720,972 research outputs found
Le terapie conservative nella metrorragia disfunzionale e suoi risvolti nella terza età
No full textAutomatic leak detection in water distribution networks
No full textA large percentage of water is lost in many water distribution systems in transit from the treatment plant to the consumer. Available statistics show that the amount of real (physical) water losses may exceed 30% of the input volume (EPA, 2010). Several techniques and equipment for pinpointing leaks are available. Acoustic devices are the principal type of equipment used to locate leaks in distribution systems (Hunaidi et al., 2006, Hunaidi et al., 2000, Gao et al., 2005, Khulief et al., 2012). This work investigates the use of vibration monitoring tools and acoustic measurements for the detection of burst leaks in water pipelines. The long-term project, planned by the R&D department of the multi-utility Hera S.p.A. (Bologna, Italy), aims at developing a device for automatically detecting bursts located in the customer connection branches running from the mains to the user’s water meter. The system should permit early detection of water leaks and, together with a DMA software management and the system for automatic meter reading (AMR), is expected to improve the efficiency of the water distribution system
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
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