Добірка наукової літератури з теми "Observations par drone"

The minuet is the Baroque dance “par excellence,” first danced in Louis XIV’s court. One of its intrinsic characteristics is the deliberate contradiction between the movements and the music. Phrase lengths can also vary, thus creating even more intricate ambiguities between music and steps. Choreographic descriptions are given. As to tempo, the sources are by no means unanimous. Minuets in French court dances typically come in pairs, a tradition Bach generally follows: although no dynamic instructions are offered, the two Bach minuets examined here have clear stylistic differences. Minuet I has almost no slurs for the first eighteen bars; Montéclair’s bowings for the minuet are examined and used as an initial blueprint for this example. By contrast, the first half of Minuet II centers around a musette-like drone and is more legato in character. The Observations section provides detailed musical and technical advice, and source-derived quotations.

Abstract The Student’s Research Companion focuses on an often-overlooked part of the academic experience. This chapter briefly illustrates the observations, convictions, and conclusions that drove us to curate mindsets and notions useful to those who engage their next research journey.

A million people die every year as a result of war and terrorism. According to these statistics, armed conflict will cost another 20 million lives in the coming two decades. Is there anything we can do to stop that from happening? The origin of war is one of the oldest questions of humanity. Every major religion sets rules that limit armed conflicts. Yet war seems to be a destructive power that is present throughout history. Is it within our power to prevent war and terrorism? British meteorologist Lewis Fry Richardson was one of the first to apply statistical analysis to warfare. Richardson was a Quaker whose beliefs prevented him from serving in combat, so he drove an ambulance during World War I instead. It was then that he first began to collect data on the death toll attributable to armed conflict. Richardson went on to study military confrontations from 1820 to 1945, ranging from minor local skirmishes to all-out world wars. As we might expect, he found that the deadlier the conflict, the less frequent its occurrence. What was not expected, however, was his observation that the frequency of wars follows a similar kind of scaling law as earthquakes and avalanches. There are roughly fifteen conflicts each century costing more than a million lives. Those with a death toll above 100,000 occur 100 times, those with 10,000 or more deaths 800 times, and so on. A tenfold increase in lethality thus corresponds with an eightfold decline in frequency. This came as a great surprise because it suggests that wars don’t occur randomly. The fixed proportion of smaller and bigger conflicts shows that they are interrelated and that there is a common set of forces driving a dispute toward war. This is a profoundly worrying conclusion for historians, who customarily ascribe each new outbreak of violence to a set of unique contingencies. Yet this is only part of the story. Scaling law statistics suggest that there is something universal shared by all wars—something that may be inherent to human society.

The progressive upgrading of heavy-duty gas turbines, aimed at increased performance, can ultimately introduce more onerous operating conditions, to the point that original design limits can be approached. An increased gas turbine pressure ratio together with compression and expansion line adjustments can directly affect the rotor axial thrust. Other than the individual forces acting on the rotor, a key component to be taken into account is the fluid film thrust bearing, which should assure safe and reliable operation during the worst case operating conditions. Typically, such bearings are des

Visual navigation is a cornerstone of many modern navigation systems, from computer mice sensors through cars, guided missiles, spacecraft proximity operations and landers. Since 2017 the Students’ Space Association at Warsaw University of Technology has been developing the FOK rocket - a guidance, navigation and control research and development platform. The rocket is aerodynamically controlled using canards and is capable of reaching an apogee of about 1700 metres, a speed of Mach 0.6. It is fully reusable thanks to a parachute recovery system. Currently, the team is developing a vision-base