On-site measurement of load and no-load losses of GSU transformer
Present development and production of power transformers with lower losses in addition to replacement of outdated transformers assume regular measurement of losses in both load and no-load regime. These measurements are very demanding especially in the case of on-situ measurements. The complexity of the measurements grows with the size of transformer. This paper presents one typical test of losses measuring in load and no-load regime of power transformer with nominal power of 40 MVA in HPP Perucica.
Limitations of Grundy & Kabaila ’ s simplified method and its repercussion 1 on the safety and serviceability of successively shored building structures 2
10 One of the most critical stages for a structure’s safety is precisely its construction process, 11 and this problem is even more acute in buildings with reinforced concrete structures. These 12 structures are usually built by shoring successive floors, so that the most recently poured floor 13 rests on the lower floors by means of shores. It is therefore vitally important to have calculation 14 tools available to estimate the loads to which the shores and slabs are subjected in each stage 15 of construction. A number of calculation methods have been proposed to date, of which the 16 one proposed by Grundy & Kabaila in 1963 is the best known and most frequently used. This 17 paper analyses the limitations of Grundy & Kabaila’s method by means of a parametric study 18 of FEM simulations, which found a large number of situations in which this method presented 19 unsafe results as regards the estimated loads on the slabs. In many situations, therefore, 20 applying this method could gravely affect a building’s in-service behavior and durability. The 21 paper’s final objectives are to make the reader aware of the limitations of Grundy & Kabaila’s 22 method and the need to use the more refined methods now available to estimate the loads on 23 shores and slabs in reinforced concrete buildings under construction. 24
Technological change in the wine market? The role of QR codes and wine apps in consumer wine purchases
As an experiential good, wine purchases in the absence of tastings are often challenging and information-laden decisions. Technology has shaped the way consumers negotiate this complex purchase process. Using a sample of 631 US wine consumers, this research aims to identify the role of mobile applications and QR codes in the wine purchase decision. Results suggest that wine consumers that consider themselves wine connoisseurs or experts, enjoy talking about wine, and are interested in wine that is produced locally, organically, or sustainably are more likely to employ technology in their wine purchase decision. While disruption appears to have occurred on the supply side (number of wine applications available and the number of wine labels with a QR code), this research suggests that relatively little change is occurring on the demand side (a relatively small segment of the population—those already interested in wine—are employing the technology to aid in their purchase decision).