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Asymmetries
Asymmetry is the absence of, or a violation of, symmetry (the property of an object being invariant to a transformation, such as reflection). Symmetry is an important property of both physical and abstract systems and it may be displayed in precise terms or in more aesthetic terms. The absence of or violation of symmetry that are either expected or desired can have important consequences for a system. In organisms Due to how cells divide in organisms, asymmetry in organisms is fairly usual in at least one dimension, with biological symmetry also being common in at least one dimension. Louis Pasteur proposed that biological molecules are asymmetric because the cosmic .e. physicalforces that preside over their formation are themselves asymmetric. While at his time, and even now, the symmetry of physical processes are highlighted, it is known that there are fundamental physical asymmetries, starting with time. Asymmetry in biology Asymmetry is an important and widespread ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Handedness
In human biology, handedness is an individual's preferential use of one hand, known as the dominant hand, due to and causing it to be stronger, faster or more Fine motor skill, dextrous. The other hand, comparatively often the weaker, less dextrous or simply less subjectively preferred, is called the non-dominant hand. In a study from 1975 on 7,688 children in US grades 1–6, left handers comprised 9.6% of the sample, with 10.5% of male children and 8.7% of female children being left-handed. Overall, around 90% of people are right-handed. Handedness is often defined by one's writing hand. It is fairly common for people to prefer to do a particular task with a particular hand. Cross-dominance, Mixed-handed people change hand preference depending on the task. Not to be confused with handedness, ambidexterity describes having equal ability in both hands. Those who learn it still tend to favor their originally dominant hand. Natural ambidexterity (equal preference of either hand) d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Facial Symmetry
Facial symmetry is one specific measure of bodily symmetry. Along with traits such as averageness and youthfulness, it influences judgments of aesthetic traits of physical attractiveness and beauty. For instance, in mate selection, people have been shown to have a preference for symmetry. Facial bilateral symmetry is typically defined as fluctuating asymmetry of the face comparing random differences in facial features of the two sides of the face. The human face also has systematic, directional asymmetry: on average, the face (mouth, nose and eyes) sits systematically to the left with respect to the axis through the ears, the so-called ''aurofacial asymmetry''. Directional asymmetry Directional asymmetry is systematic. The average across the population is not "symmetric", but statistically significantly Bias (statistics), biased on one direction. That means, that individuals of a species can be symmetric, or even asymmetric to the opposite side (see, e.g., handedness), but mos ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Left-right Asymmetry (biology)
In developmental biology, left-right asymmetry (LR asymmetry) is the process in early embryonic development that breaks the normal symmetry in the bilateral embryo. In vertebrates, left-right asymmetry is established early in development at a structure called the left-right organizer (the name of which varies between species) and leads to activation of different signalling pathways on the left and right of the embryo. This in turn causes several organs in adults to develop LR asymmetry, such as the tilt of the heart, the different number of lung lobes on each side of the body, and the position of the stomach and spleen on the right side of the body. If this process does not occur correctly in humans it can result in heterotaxy or situs inversus. LR asymmetry is pervasive throughout all animals, including invertebrates. Examples of invertebrate LR asymmetry include the large and small claws of the fiddler crab, asymmetrical gut coiling in ''Drosophila melanogaster,'' and de ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Heart
The heart is a muscular Organ (biology), organ found in humans and other animals. This organ pumps blood through the blood vessels. The heart and blood vessels together make the circulatory system. The pumped blood carries oxygen and nutrients to the tissue, while carrying metabolic waste such as carbon dioxide to the lungs. In humans, the heart is approximately the size of a closed fist and is located between the lungs, in the middle compartment of the thorax, chest, called the mediastinum. In humans, the heart is divided into four chambers: upper left and right Atrium (heart), atria and lower left and right Ventricle (heart), ventricles. Commonly, the right atrium and ventricle are referred together as the right heart and their left counterparts as the left heart. In a healthy heart, blood flows one way through the heart due to heart valves, which prevent cardiac regurgitation, backflow. The heart is enclosed in a protective sac, the pericardium, which also contains a sma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Symmetry In Biology
Symmetry in biology refers to the symmetry observed in organisms, including plants, animals, fungi, and bacteria. External symmetry can be easily seen by just looking at an organism. For example, the face of a human being has a plane of symmetry down its centre, or a pine cone displays a clear symmetrical spiral pattern. Internal features can also show symmetry, for example the tubes in the human body (responsible for transporting gases, nutrients, and waste products) which are cylindrical and have several planes of symmetry. Biological symmetry can be thought of as a balanced distribution of duplicate body parts or shapes within the body of an organism. Importantly, unlike in mathematics, symmetry in biology is always approximate. For example, plant leaves – while considered symmetrical – rarely match up exactly when folded in half. Symmetry is one class of patterns in nature whereby there is near-repetition of the pattern element, either by reflection or rotation. W ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Proa
The ProA is the German basketball league system, second-tier Sports league, league of professional club basketball in Germany. The league comprises 16 teams. Officially the ProA is part of the ''2. Basketball Bundesliga'', which consists of the two hierarchical leagues ''ProA'' and ''ProB''. Before the 2007–08 season, the ''2. Basketball Bundesliga'' was a basketball league with the same name, which consisted of two geographical divisions. At the end of the league stage, the top two teams qualify for the Basketball Bundesliga, and the teams positioned 15th and 16th are Promotion and relegation, relegated to the lower league, ProB. Current teams (2024–25) Champions The champions of a given ProA season promote to the Basketball Bundesliga, along with the runner-up of the Finals. Performances by club Awards Coach of the Year Records Lachlan Dent holds the ProA league record for 3-poniters made in a single game. 7 April 2024, he hit 10 for his PS Karlsruhe Lions again ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Blohm & Voss BV 141
The Blohm & Voss BV 141 (originally the Ha 141) was an unorthodox tactical reconnaissance aircraft developed by the Nazi Germany, German aircraft manufacturer Blohm & Voss (aircraft), Blohm & Voss. It was notable for its uncommon asymmetrical aircraft, structural asymmetry. Development commenced during 1937 in response to a Reich Air Ministry, Reichsluftfahrtministerium (RLM/German Aviation Ministry) specification seeking a new single-engine reconnaissance aircraft. While not invited to participate, the firm's design team opted to use a radical configuration for the BV 141 that placed the crew inside of a Plexiglas-glazed Gondola (airplane), gondola that was positioned starboard of the engine and tail boom. Although the RLM declined to finance its development in favour of other options, Blohm & Voss chose to spend its own money to produce a prototype, which performed its maiden flight on 25 February 1938. During flight testing, the aircraft proved itself to possess relatively go ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Auditorio De Tenerife
The Auditorio de Tenerife "Adán Martín" (commonly referred to as the Auditorio de Tenerife) is an auditorium in Santa Cruz de Tenerife, Canary Islands, Spain. Designed by architect Santiago Calatrava, it is located on the Avenue of the Constitution in the Canarian capital, and next to the Atlantic Ocean in the southern part of Port of Santa Cruz de Tenerife. Construction began in 1997 and was completed in 2003. The auditorium was inaugurated on 26 September of that year in the presence of Felipe, Prince of Asturias, and was later visited by former United States, U.S. President Bill Clinton. The building is framed within the tenets of late-modern architecture of the late 20th century. The majestic profile of the auditorium has become an architectural symbol of the city of Santa Cruz de Tenerife, the island of Tenerife and the Canary Islands. It is also regarded as the finest contemporary building in the Canary Islands and one of the most emblematic buildings of Spanish architectu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Limb (anatomy)
A limb (from Old English ''lim'', meaning "body part") is a jointed, muscled appendage of a tetrapod vertebrate animal used for weight-bearing, terrestrial locomotion and physical interaction with other objects. The distalmost portion of a limb is known as its extremity. The limbs' bony endoskeleton, known as the appendicular skeleton, is homologous among all tetrapods, who use their limbs for walking, running and jumping, swimming, climbing, grasping, touching and striking. All tetrapods have four limbs that are organized into two bilaterally symmetrical pairs, with one pair at each end of the torso, which phylogenetically correspond to the four paired fins ( pectoral and pelvic fins) of their fish ( sarcopterygian) ancestors. The cranial pair (i.e. closer to the head) of limbs are known as the forelimbs or ''front legs'', and the caudal pair (i.e. closer to the tail or coccyx) are the hindlimbs or ''back legs''. In animals with a more erect bipedal ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Outrigger Canoe
Outrigger boats are various watercraft featuring one or more lateral support floats known as outriggers, which are fastened to one or both sides of the main hull (watercraft), hull. They can range from small dugout (boat), dugout canoes to large plank-built vessels. Outrigger boats can also vary in their configuration, from the ancestral double-hull configuration (catamarans), to single-outrigger vessels prevalent in the Pacific Islands and Madagascar, to the double-outrigger vessels (trimarans) prevalent in Maritime Southeast Asia, Island Southeast Asia. They are traditionally fitted with Austronesian sails, like the crab claw sails and tanja sails, but in modern times are often fitted with petrol engines. Unlike a single-hulled vessel, an outrigger or double-hull vessel generates stability as a result of the distance between its hulls rather than due to the shape of each individual hull. As such, the hulls of outrigger or double-hull boats are typically longer, narrower and mo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fire-resistance Rating
A fire-resistance rating typically means the duration for which a passive fire protection system can withstand a standard fire resistance test. This can be quantified simply as a measure of time, or it may entail other criteria, involving evidence of functionality or fitness for purpose. Common rating systems The following depict the most commonly used international time/temperature curves: File:Din iso astm ul curves.JPG, Time/temperature curves used for testing the fire-resistance rating of passive fire protection systems such as firestops, fire doors, wall and floor assemblies, etc., which are used in compartmentalisation in buildings and the petrochemical industry in Europe and North America. File:Tunnel hc iso curves.jpg, Time/temperature curves used for testing the fire-resistance rating of passive fire protection systems in tunnels in Germany, the Netherlands and France. File:Rws tunnel curve.jpg, Time/temperature curve used for testing the fire-resistance rating of p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Puente De La Mujer
The Puente de la Mujer ( Spanish for "Woman's Bridge") is a rotating footbridge for Dock 3 of the Puerto Madero commercial district of Buenos Aires, Argentina. It is of the cantilever spar cable-stayed bridge type and is also a swing bridge, but somewhat unusual in its asymmetrical arrangement. It has a single mast with cables suspending a portion of the bridge which rotates 90 degrees in order to allow water traffic to pass. When it swings to allow watercraft passage, the far end comes to a resting point on a stabilizing pylon. Design Designed by the Spanish architect and structural engineer Santiago Calatrava on a plan very similar to a 251-metre bridge over the Guadalquivir River in Seville, Spain (1992) and a 213-metre bridge over the Sacramento River in Redding, California (2004), it has a forward-, rather than a reverse-angled cantilever, as is seen in those bridges. The bridge is the first of only two Calatrava structures in Latin America. The architect has described t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
