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RECCO SAR Helicopter Detector
The RECCO is a rescue technology used by organised rescue teams as an additional tool to more quickly locate people buried by an avalanche or lost in the outdoors. The system is based on a harmonic radar system and composed by a detector and a passive reflector integrated into outdoor clothing and gears. History The RECCO rescue technology was developed by Magnus Granhed, in response to his personal experience with a fatal avalanche accident in Åre, Sweden, in 1973. Starting in the winter of 1978–1979, Granhed collaborated with Bengt Enander's team at the Department of Electromagnetic Theory, Royal Institute of Technology in Stockholm to develop an avalanche rescue system, using the principle of harmonic radar. Granhed formed RECCO AB in 1983 and created the first functional prototype. In 1987, a woman was localised with the RECCO rescue technology from a helicopter in Lenzerheide, Switzerland, in the first live rescue found using the technology. In 2015, RECCO introduced ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Technology
Technology is the application of knowledge to reach practical goals in a specifiable and reproducible way. The word ''technology'' may also mean the product of such an endeavor. The use of technology is widely prevalent in medicine, science, industry, communication, transportation, and daily life. Technologies include physical objects like utensils or machines and intangible tools such as software. Many technological advancements have led to societal changes. The earliest known technology is the stone tool, used in the prehistoric era, followed by fire use, which contributed to the growth of the human brain and the development of language in the Ice Age. The invention of the wheel in the Bronze Age enabled wider travel and the creation of more complex machines. Recent technological developments, including the printing press, the telephone, and the Internet have lowered communication barriers and ushered in the knowledge economy. While technology contributes to econom ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Detector RECCO Apuntando A Un Reflector RECCO Integrado En El Pantalón
A sensor is a device that produces an output signal for the purpose of sensing a physical phenomenon. In the broadest definition, a sensor is a device, module, machine, or subsystem that detects events or changes in its environment and sends the information to other electronics, frequently a computer processor. Sensors are always used with other electronics. Sensors are used in everyday objects such as touch-sensitive elevator buttons (tactile sensor) and lamps which dim or brighten by touching the base, and in innumerable applications of which most people are never aware. With advances in micromachinery and easy-to-use microcontroller platforms, the uses of sensors have expanded beyond the traditional fields of temperature, pressure and flow measurement, for example into MARG sensors. Analog sensors such as potentiometers and force-sensing resistors are still widely used. Their applications include manufacturing and machinery, airplanes and aerospace, cars, medicine, robot ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Avalanche Safety
An avalanche is a rapid flow of snow down a slope, such as a hill or mountain. Avalanches can be set off spontaneously, by such factors as increased precipitation or snowpack weakening, or by external means such as humans, animals, and earthquakes. Primarily composed of flowing snow and air, large avalanches have the capability to capture and move ice, rocks, and trees. Avalanches occur in two general forms, or combinations thereof: slab avalanches made of tightly packed snow, triggered by a collapse of an underlying weak snow layer, and loose snow avalanches made of looser snow. After being set off, avalanches usually accelerate rapidly and grow in mass and volume as they capture more snow. If an avalanche moves fast enough, some of the snow may mix with the air, forming a powder snow avalanche. Though they appear to share similarities, avalanches are distinct from slush flows, mudslides, rock slides, and serac collapses. They are also different from large scale movements ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Skiing In Sweden
Sport is considered a national pastime in Sweden, and about half of the population actively takes part in sports activities. The most important all-embracing organisations for sports in Sweden are the Swedish Sports Confederation, and the Swedish Olympic Committee. In total over 2 million people (about 20% of the total population) are members of a sports club. The sports with most participants are football, floorball, equestrian sports, handball, golf, gymnastics and athletics, while the sports with the largest number of television spectators are football, ice hockey, handball, bandy, golf, motor sport (especially speedway and Formula 1) and athletics. Ice hockey and football are the main sports. Winter sports are also popular, both in the number of participants and in spectators, while floorball gained large popularity in the 1990s amongst participants, spectators grew in the last five years to outnumber other team sports amongst the spectators. Other popular sports include bandy, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rescue Equipment
Rescue comprises responsive operations that usually involve the saving of life, or the urgent treatment of injuries after an accident or a dangerous situation. Tools used might include search and rescue dogs, mounted search and rescue horses, helicopters, the "jaws of life", and other hydraulic cutting and spreading tools used to extricate individuals from wrecked vehicles. Rescue operations are sometimes supported by rescue vehicles operated by rescue squads. Rescue is a potent theme in human psychology, both from mortal perils and moral perils, and is often treated in fiction, with the rescue of a damsel in distress being a notable trope. Psychoanalyst Sigmund Freud introduced the concept of "rescue fantasies" by men pursuing "fallen women" in his 1910 work "A Special Type of Choice of Object Made by Men"; Freud's insight into this aspect of male psychology might retain merit, though his proposed Oedipus complex used to frame this concept is no longer in vogue. Withi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ground Beetle
Ground beetles are a large, cosmopolitan distribution, cosmopolitan family (biology), family of beetles, the Carabidae, with more than 40,000 species worldwide, around 2,000 of which are found in North America and 2,700 in Europe. As of 2015, it is one of the 10 most species-rich animal families. They belong to the Adephaga. Members of the family are primarily carnivorous, but some members are phytophagous or omnivorous. Description and ecology Although their body shapes and coloring vary somewhat, most are shiny black or metallic and have ridged wing covers (elytra). The elytra are fused in some species, particularly the large Carabinae, rendering the beetles unable to fly. The species ''Mormolyce phyllodes'' is known as violin beetle due to their peculiarly shaped elytra. All carabids except the quite primitive flanged bombardier beetles (Paussinae) have a groove on their arthropod leg, fore leg tibiae bearing a comb of hairs used for cleaning their antenna (biology), antennae. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tropical Frogs
''Micrixalus'' (commonly known as dancing frogs, tropical frogs, and torrent frogs) is a genus of frogs from that are endemic to the Western Ghats in India. They are monotypic within the family Micrixalidae. Before being raised to the family level they were classified as the subfamily Micrixalinae within Ranidae. ''Micrixalus'' frogs, such as '' Micrixalus saxicola'', are popularly known as "dancing frogs" due to their peculiar habit of waving their feet to attract females during the breeding season. Dancing frogs are extremely vulnerable as their habitat is severely threatened. Description The family is characterized by having a pectoral girdle that is firmisternal and tadpoles having a single row of labial teeth. Biju ''et al.'' (2014) list the following characteristic features as common to all species of ''Micrixalus'': Natural history Dancing frogs are found in the vicinity of fast and slow moving perennial streams in the forests of the Western Ghats. Typical habita ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amphibian
Amphibians are tetrapod, four-limbed and ectothermic vertebrates of the Class (biology), class Amphibia. All living amphibians belong to the group Lissamphibia. They inhabit a wide variety of habitats, with most species living within terrestrial animal, terrestrial, fossorial, arboreal or freshwater aquatic ecosystems. Thus amphibians typically start out as larvae living in water, but some species have developed behavioural adaptations to bypass this. The young generally undergo metamorphosis from larva with gills to an adult air-breathing form with lungs. Amphibians use their skin as a secondary respiratory surface and some small terrestrial salamanders and frogs lack lungs and rely entirely on their skin. They are superficially similar to reptiles like lizards but, along with mammals and birds, reptiles are amniotes and do not require water bodies in which to breed. With their complex reproductive needs and permeable skins, amphibians are often ecological indicators; in re ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
RECCO SAR Helicopter Detector
The RECCO is a rescue technology used by organised rescue teams as an additional tool to more quickly locate people buried by an avalanche or lost in the outdoors. The system is based on a harmonic radar system and composed by a detector and a passive reflector integrated into outdoor clothing and gears. History The RECCO rescue technology was developed by Magnus Granhed, in response to his personal experience with a fatal avalanche accident in Åre, Sweden, in 1973. Starting in the winter of 1978–1979, Granhed collaborated with Bengt Enander's team at the Department of Electromagnetic Theory, Royal Institute of Technology in Stockholm to develop an avalanche rescue system, using the principle of harmonic radar. Granhed formed RECCO AB in 1983 and created the first functional prototype. In 1987, a woman was localised with the RECCO rescue technology from a helicopter in Lenzerheide, Switzerland, in the first live rescue found using the technology. In 2015, RECCO introduced ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
International Commission For Alpine Rescue
The International Commission for Alpine Rescue (ICAR) is an international association of mountain rescue organization. Founded in 1948, ICAR is headquartered in Kloten, Switzerland ). Swiss law does not designate a ''capital'' as such, but the federal parliament and government are installed in Bern, while other federal institutions, such as the federal courts, are in other cities (Bellinzona, Lausanne, Luzern, Neuchâtel .... ICAR currently has 85 member organizations in 34 countries. The official ICAR languages are English, German and French. Structure The top organizational body is the ICAR Assembly of Delegates, where member organizations are represented by delegates (number of delegates depending on the type of membership). The Assembly usually meets in October upon the annual ICAR Convention. The Convention is alternately organized by different member organizations. The Assembly appoints members for the ICAR Executive Board (President, Vice-President, Treasury, Te ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Duty Cycle
A duty cycle or power cycle is the fraction of one period in which a signal or system is active. Duty cycle is commonly expressed as a percentage or a ratio. A period is the time it takes for a signal to complete an on-and-off cycle. As a formula, a duty cycle (%) may be expressed as: :D = \frac \times 100\% Equally, a duty cycle (ratio) may be expressed as: :D = \frac where D is the duty cycle, PW is the pulse width (pulse active time), and T is the total period of the signal. Thus, a 60% duty cycle means the signal is on 60% of the time but off 40% of the time. The "on time" for a 60% duty cycle could be a fraction of a second, a day, or even a week, depending on the length of the period. Duty cycles can be used to describe the percent time of an active signal in an electrical device such as the power switch in a switching power supply or the firing of action potentials by a living system such as a neuron. The duty factor for periodic signal expresses the same notion, but ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Directional Antenna
A directional antenna or beam antenna is an antenna which radiates or receives greater power in specific directions allowing increased performance and reduced interference from unwanted sources. Directional antennas provide increased performance over dipole antennas—or omnidirectional antennas in general—when greater concentration of radiation in a certain direction is desired. A high-gain antenna (HGA) is a directional antenna with a focused, narrow radiowave beam width, permitting more precise targeting of the radio signals. Most commonly referred to during space missions, these antennas are also in use all over Earth, most successfully in flat, open areas where there are no mountains to disrupt radiowaves. By contrast, a low-gain antenna (LGA) is an omnidirectional antenna with a broad radiowave beam width, that allows the signal to propagate reasonably well even in mountainous regions and is thus more reliable regardless of terrain. Low-gain antennas are often used in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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