| Race details | |
|---|---|
| Date | October |
| Region | Kruibeke, Belgium |
| Discipline | Cyclo-cross |
| Competition | Exact Cross |
| History | |
| First edition | 2016 |
| Editions | 5 (as of 2021) |
| First winner | Men: Michael Vanthourenhout (BEL)Women: Jolien Verschueren (BEL) |
| Most recent | Men: Michael Vanthourenhout (BEL) Women:  Fem van Empel (NED) |
The Polderscross is a cyclo-cross race held in Kruibeke, Belgium, which is part of the Exact Cross, formerly known as the Ethias Cross/Brico Cross.
| Year | Men's winner | Women's winner |
|---|---|---|
| 2022 | Michael Vanthourenhout | Fem van Empel |
| 2021 | cancelled | |
| 2020 | Toon Aerts | Lucinda Brand |
| 2019 | Eli Iserbyt | Annemarie Worst |
| 2017 | Mathieu van der Poel |  Katie Compton |
| 2016 | Michael Vanthourenhout | Jolien Verschueren |
In biology, a hybrid is the offspring resulting from combining the qualities of two organisms of different breeds, varieties, species or genera through sexual reproduction. Generally, it means that each cell has genetic material from two different organisms, whereas an individual where some cells are derived from a different organism is called a chimera. Hybrids are not always intermediates between their parents, but can show hybrid vigor, sometimes growing larger or taller than either parent. The concept of a hybrid is interpreted differently in animal and plant breeding, where there is interest in the individual parentage. In genetics, attention is focused on the numbers of chromosomes. In taxonomy, a key question is how closely related the parent species are.
In mathematics, the cross product or vector product is a binary operation on two vectors in a three-dimensional oriented Euclidean vector space, and is denoted by the symbol . Given two linearly independent vectors a and b, the cross product, a × b, is a vector that is perpendicular to both a and b, and thus normal to the plane containing them. It has many applications in mathematics, physics, engineering, and computer programming. It should not be confused with the dot product.
Cross-validation, sometimes called rotation estimation or out-of-sample testing, is any of various similar model validation techniques for assessing how the results of a statistical analysis will generalize to an independent data set. Cross-validation is a resampling method that uses different portions of the data to test and train a model on different iterations. It is mainly used in settings where the goal is prediction, and one wants to estimate how accurately a predictive model will perform in practice. In a prediction problem, a model is usually given a dataset of known data on which training is run, and a dataset of unknown data against which the model is tested. The goal of cross-validation is to test the model's ability to predict new data that was not used in estimating it, in order to flag problems like overfitting or selection bias and to give an insight on how the model will generalize to an independent dataset.
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In geometry and science, a cross section is the non-empty intersection of a solid body in three-dimensional space with a plane, or the analog in higher-dimensional spaces. Cutting an object into slices creates many parallel cross-sections. The boundary of a cross-section in three-dimensional space that is parallel to two of the axes, that is, parallel to the plane determined by these axes, is sometimes referred to as a contour line; for example, if a plane cuts through mountains of a raised-relief map parallel to the ground, the result is a contour line in two-dimensional space showing points on the surface of the mountains of equal elevation.
The UCI Mountain Bike World Championships are the world championship events for mountain bike racing in the disciplines of cross country, downhill, and four-cross. They are organized by the Union Cycliste Internationale (UCI), the governing body of world cycling.
The 2006 IAAF World Cross Country Championships took place on April 1/2, 2006. The races were held at the Umi-no-nakamichi Seaside Park in Fukuoka, Japan, Japan's National Cross Country Course which is the permanent residence of the annual Fukuoka International Cross Country meeting.
The 2005 IAAF World Cross Country Championships took place on March 19/20, 2005. The races were held at the Hippodrome Joseph Desjoyaux in Saint-Galmier near Saint-Étienne, France. Reports of the event were given in The New York Times, in the Herald, and for the IAAF.
The 2003 IAAF World Cross Country Championships took place on March 29/30, 2003. The races were held at the L'Institut Équestre National in Avenches near Lausanne, Switzerland. Reports of the event were given in The New York Times, in the Herald, and for the IAAF.
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The 2001 IAAF World Cross Country Championships took place on March 24/25, 2001. The races were held at the Hippodrome Wellington in Ostend (Oostende), Belgium. Reports of the event were given in The New York Times, in the Herald, and for the IAAF.
The 2000 IAAF World Cross Country Championships took place on March 18/19, 2000. The races were held at the Sporting Complex in Vilamoura, Portugal. Reports of the event were given in The New York Times, in the Herald, and for the IAAF.
The 1999 IAAF World Cross Country Championships took place on 27 and 28 March 1999. The races were held at the Barnett Demesne/Queen's University Playing Fields in Belfast, United Kingdom. Reports of the event were given in The New York Times, in the Herald, and for the IAAF.
The 1998 IAAF World Cross Country Championships took place on March 21/22, 1998. The races were held at the Menara district in Marrakech, Morocco. Reports of the event were given in The New York Times, in the Herald, and for the IAAF.
The 2007 IAAF World Cross Country Championships took place on March 24, 2007. The races were held at the Mombasa Golf Course in Mombasa, Kenya. Four races took place, one for men, women, junior men and junior women respectively. All races encompassed both individual and team competition. The short race for men and women that was run between 1998 and 2006 was scrapped and the World Cross Country Championships went back to one-day format. Reports of the event were given in the Herald, and for the IAAF.
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Nicola Glencross is a Scottish professional wrestler currently signed to WWE, where she performs on the Raw brand under the ring name Nikki Cross. She is a one-time WWE Raw Women's Champion, three-time WWE Women's Tag Team Champion and an 11-time and final WWE 24/7 Champion.