T-Visual Approach Slope Indicator System (T-VASIS) versus Precision Approach Path Indicator (PAPI) – the debate revisited

Two visual approach slope indicator lighting systems are in use in Australasia. These systems are designed to ameliorate and overcome the visual illusions associated with the approach and landing manoeuvre of aircraft. Using a flight simulator, 14 student pilot candidates, with little actual flying experience, ‘flew’ 10 approaches using PAPI and 10 approaches using T-VASIS. The approaches were ‘flown’ in various flight conditions including low visibility. The visual approach slope indicator lighting system was randomly assigned to each experimental condition. Results indicated that overall, there was less deviation from a correct glidepath when the approaches were ‘flown’ using T-VASIS. A post-flight survey indicated that participants found T-VASIS to be more intuitive. The results are discussed with reference to the prevailing preference of PAPI over T-VASIS by aviation authorities

Dry Forages: Process and techniques (OK-Net EcoFeed Practice Abstract)

To obtain the best forage quality, cutting at the correct time is important, when cellulose and lignin content is not too high. During spring, cutting early is the best option to preserve forage quality; for grasses, the correct time is beginning of heading; for leguminous plants, it is beginning of blooming. However delaying cutting increases dry matter (DM) content, which speeds up the drying process. Favourable weather conditions can reduce drying costs. Making hay decreases the moisture content to 15 % and increases dry matter (DM) to 85 %. Cutting height (Figure 2) is important for a perennial crop, affecting speed and quantity of regrowth. Generally is not recommended cutting too close to the ground, because basal buds are the slowest to refill and have low vigour. • Spreading the grass at cutting helps to decrease drying time and minimise forage quality and quantity losses. On field crushing of stems using a conditioner, increases water loss by up to 30 % and increases DM. The drying process can be completed on the field or in drying rooms, where forage quality is highest. At the end of the drying process, the hay can be baled and stored

Noncompensatory Consideration and Compensatory Choice : an Application to Stackelberg Competition

I would like to thank Ran Spiegler for his helpful suggestions. I am also grateful to Miguel Angel Ballester, Johannes Hoerner, Philippe Jehiel, Erika Magnago, Paola Manzini, Marco Mariotti, William Neilson, an anonymous referee, the editor Nicholas C. Yannelis, and the seminar audience at Aberdeen and UCL for their comments. Any error is my own responsibility.Peer reviewedPreprin

Power Modelling for Heterogeneous Cloud-Edge Data Centers

Existing power modelling research focuses not on the method used for developing models but rather on the model itself. This paper aims to develop a method for deploying power models on emerging processors that will be used, for example, in cloud-edge data centers. Our research first develops a hardware counter selection method that appropriately selects counters most correlated to power on ARM and Intel processors. Then, we propose a two stage power model that works across multiple architectures. The key results are: (i) the automated hardware performance counter selection method achieves comparable selection to the manual selection methods reported in literature, and (ii) the two stage power model can predict dynamic power more accurately on both ARM and Intel processors when compared to classic power models.Comment: 10 pages,10 figures,conferenc