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Mixed doubles - Mixed doubles

Mixed doubles has a long history in tennis, with the variant appearing at the United States National Championships in 1892, followed by the French Championships in 1902, Wimbledon in 1913, and the Australian Open in 1922. It made an early appearance at the second Summer Olympics in 1900 though it was dropped from the programme in the 1920s and did not reappear until the 2012 London Olympics. The social benefits of mixed tennis were recognised in England in the late 1800s, with it serving as a social outing for married couples and a way for single men and women to build a relationship.

Mixed doubles - Mixed doubles

The concept was a late addition to the sport of curling, with the World Mixed Doubles Curling Championship being first held in 2008 and the 2018 Winter Olympics being the first time it was given Olympic status.

Mixed doubles - Mixed doubles

Mixed doubles has featured at the World Table Tennis Championships since its first edition in 1926, although this did not gain Olympic status until 2020.

Mixed doubles - Mixed doubles

The 1899 All England Open Badminton Championships saw the first major mixed doubles badminton event. It was included on the Olympic programme in 1996.

Mixed reality - Mixed Reality

Augmented virtuality (AV) is a subcategory of mixed reality that refers to the merging of real-world objects into virtual worlds.

Mixed brigade - Mixed Brigades

The Mixed Brigades of the International Brigades are in Roman numerals.

Mixed doubles - Mixed pairs

The World Bridge Championships debuted a mixed pairs competition at its second edition in 1966.

Mixed-sex sports - Mixed relay

In swimming, mixed relay races were introduced at the 2014 FINA World Swimming Championships (25 m) (4 × 50 m freestyle and medley) and the 2015 World Aquatics Championships (4 × 100 m freestyle and medley). The event will debut at the 2020 Summer Olympics (4 × 100 m medley). In open water swimming, mixed-gendered relays were introduced at the 2011 World Aquatics Championships (4 × 1250 m).

Mixed-sex sports - Mixed relay

In cross country running, a 4 × 2 km mixed relay race was added at the 2017 IAAF World Cross Country Championships.

Mixed-sex sports - Mixed relay

In road cycling, the 2019 UCI Road World Championships introduced a team time trial mixed relay where first three men and then three women ride together as a national team. Distances vary in road cycling. The 2019 race is 2 × 14 km.

Mixed-sex sports - Mixed relay

In triathlon, the ITU Triathlon Mixed Relay World Championships mixed relay race has been held since 2009. Also, the triathlon at the Youth Olympic Games has a mixed relay race since 2010, and the event will be introduced at the 2020 Summer Olympics. As in standard triathlons, each triathlon competitor must do a segment of swimming, cycling and running.

Mixed-sex sports - Mixed relay

In biathlon, a mixed relay race was first held at the Biathlon World Championships 2005 in Khanty-Mansiysk (4 × 6 km), and it was added to the 2014 Winter Olympics (4 × 6 km / 7.5 km).

Mixed-sex sports - Mixed relay

In running, a 4 × 400 meters mixed relay race was introduced at the 2017 IAAF World Relays, and will be added to the 2019 World Championships in Athletics and 2020 Summer Olympics. In addition, a 2 × 2 × 400 m and shuttle hurdles mixed relay races were introduced at the 2019 IAAF World Relays. The Match Europe v USA in 2019 had a mixed 200+200+400+800 metres sprint medley relay.

Mixed layer - Oceanic mixed layer formation

There are three primary sources of energy for driving turbulent mixing within the open-ocean mixed layer. The first is the ocean waves, which act in two ways. The first is the generation of turbulence near the ocean surface, which acts to stir light water downwards. Although this process injects a great deal of energy into the upper few meters, most of it dissipates relatively rapidly. If ocean currents vary with depth, waves can interact with them to drive the process known as Langmuir circulation, large eddies that stir down to depths of tens of meters. The second is wind-driven currents, which create layers in which there are velocity shears. When these shears reach sufficient magnitude, they can eat into stratified fluid. This process is often described and modelled as an example of Kelvin-Helmholtz instability, though other processes may play a role as well. Finally, if cooling, addition of brine from freezing sea ice, or evaporation at the surface causes the surface density to increase, convection will occur. The deepest mixed layers (exceeding 2000 m in regions such as the Labrador Sea) are formed through this final process, which is a form of Rayleigh–Taylor instability. Early models of the mixed layer such as those of Mellor and Durbin included the final two processes. In coastal zones, large velocities due to tides may also play an important role in establishing the mixed layer.

Mixed layer - Atmospheric mixed layer formation

The atmospheric mixed layer results from convective air motions, typically seen towards the middle of the day when air at the surface is warmed and rises. It is thus mixed by Rayleigh–Taylor instability. The standard procedure for determining the mixed layer depth is to examine the profile of potential temperature, the temperature which the air would have if it were brought to the pressure found at the surface without gaining or losing heat. As such an increase of pressure involves compressing the air, the potential temperature is higher than the in-situ temperature, with the difference increasing as one goes higher in the atmosphere. The atmospheric mixed layer is defined as a layer of (approximately) constant potential temperature, or a layer in which the temperature falls at a rate of approximately 10 °C/km, provided it is free of clouds. Such a layer may have gradients in the humidity, though. As is the case with the ocean mixed layer, velocities will not be constant throughout the atmospheric mixed layer.

Mixed layer - Limnological mixed layer formation

The study of limnology encompasses all inland water bodies, including bodies of water with salt in them. In saline lakes and seas (such as the Caspian Sea), mixed layer formation generally behaves similarly to the ocean.

Mixed layer - Oceanic mixed layer formation

The mixed layer is characterized by being nearly uniform in properties such as temperature and salinity throughout the layer. Velocities, however, may exhibit significant shears within the mixed layer. The bottom of the mixed layer is characterized by a gradient, where the water properties change. Oceanographers use various definitions of the number to use as the mixed layer depth at any given time, based on making measurements of physical properties of the water. Often, an abrupt temperature change called a thermocline occurs to mark the bottom of the mixed layer; sometimes there may be an abrupt salinity change called a halocline that occurs as well. The combined influence of temperature and salinity changes results in an abrupt density change, or pycnocline. Additionally, sharp gradients in nutrients (nutricline) and oxygen (oxycline) and a maximum in chlorophyll concentration are often co-located with the base of the seasonal mixed layer.

Windows Mixed Reality - Mixed Reality Portal

Mixed Reality Portal is a Universal Windows Platform app that serves as a front-end for Windows Mixed Reality. It features a 3D environment which users can explore, and customize with application shortcuts and virtual desktops. The feature originally launched with one environment, the Cliff House. A second, Skyloft, was added in the April 2018 Update.

Mixed electoral system - Mixed member proportional

Similar to parallel voting, MMP has a tier of district representatives typically elected by FPTP, and a tier of regional or at-large representatives elected by PR. Unlike parallel voting, MMP is a mixed compensatory system, meaning that the PR seats are allocated in a manner that corrects disproportionality caused by the district tier. MMP is used by Germany, Bolivia, Lesotho, and New Zealand. The additional member system refers to MMP models used in parts of the UK (Scotland and Wales), where small regions with a fixed number of seats tend to produce only moderately proportional election outcomes.

Mixed layer - Limnological mixed layer formation

Formation of a mixed layer in a lake is similar to that in the ocean, but mixing is more likely to occur in lakes solely due to the molecular properties of water. Water changes density as it changes temperature. In lakes, temperature structure is complicated by the fact that fresh water is heaviest at 3.98 °C (degrees Celsius). Thus in lakes where the surface gets very cold, the mixed layer briefly extends all the way to the bottom in the spring, as surface warms as well as in the fall, as the surface cools. This overturning is often important for maintaining the oxygenation of very deep lakes.

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