AcharyaChanakya/simple-wikipedia huggingface dataset:
"Woodland" in British forestry means any smaller area covered in trees, however dense. Forest in the British Isles means extensive wooded areas, regardless of density. Royal forests may not be wooded at all. The term ancient woodland is used in British conservation to mean any wooded land that has existed for a very long time (equivalent to the American term old growth forest).
Conservationist work hard to preserve woodlands. The woodlands in Northwest Indiana have been preserved as part of the Indiana Dunes.
Limburg (Netherlands)
Limburg is the southernmost province of the Netherlands. Its capital is Maastricht. It is the only province in the Netherlands which has hills. It is a very old province; the capital city, Maastricht, is over 2000 years old. The Limburgish people do speak Dutch, but they also speak their own dialects. These dialects - especially the ones in the South of Limburg, the normal Dutch people find difficult to understand. These dialects have many influences from German and French. The Limburgish are renowned for their famous vlaai.
Limburger cheese comes from this region.
Mount Cayley
Mount Cayley is an eroded stratovolcano. It is 11 km southeast of Callaghan Lake and 24 west of Whistler, British Columbia, Canada. It is part of the Garibaldi Volcanic Belt which is a segment of the Cascade Volcanic Arc.
A scenario of an eruption of Mount Cayley shows how western Canada is vulnerable to an eruption. The scenario is based on past activity in the Garibaldi Volcanic Belt and involves both effusive and explosive eruptions. The scenario impact is largely a result of the concentration of vulnerable infrastructure in valleys.
In 2003, Catherine Hickson, a scientist with the Geological Survey of Canada, was one of the three scientists to report on the hypothetical eruption at Mount Cayley. The first signs of activity at the volcano would probably be enlarged seismic activity in and close to the mountain. Flooding would turn out to be a huge issue for the community of Squamish and could eventually overrun parts of Highway 99.
The Mount Cayley volcanic field is named after Mount Cayley.
Limburg
Limburg might mean:
Limburg (Belgium)
Limburg is the easternmost of the five provinces of modern Flanders, which is one of the three main political and cultural sub-divisions of modern Belgium. Its capital is Hasselt.
Limburg is located west of the Meuse (Dutch "Maas") river, upon which it borders the similarly named province Limburg of the Netherlands. It also borders on the Walloon province of Liège to the south, with which it also has historical ties. To the north and west are the old territories of the Duchy of Brabant, the Flemish provinces of Flemish Brabant and Antwerp to the west, and the Dutch province of North Brabant to the north.
The province of Limburg has an area of with a population of and a density of inhabitants per km². The province is divided into three arrondissements ("arrondissementen" in Dutch) with 44 municipalities. Among these municipalities are the current capital Hasselt, the early medieval capital Borgloon, Genk, Diepenbeek (home to Hasselt University), and Tongeren, the only Roman city in the province and regarded as the oldest city of Belgium.
The municipality of Voeren is geographically detached (an exclave) from Limburg and the rest of Flanders, with the Netherlands to the north and the Walloon province of Liège to the south. This municipality was established by the municipal reform of 1977.
The highest point of the province, , is in the town of Remersdaal, Voeren municipality.
The centre of Belgian Limburg is crossed east to west by the Demer river and the Albert Canal, which run similar paths. The Demer river's drainage basin covers most of the central and southern part of the province, except for the southeastern corner, where the Jeker (in French: "(le) Geer") runs past Tongeren and into the Maas river (in French: "(la) Meuse") at Maastricht.
The eastern border of the province corresponds to the western side of the Maas, which originates in France. It's drainage basin includes not only the Jeker but most of the northern part of Belgian Limburg.
The province of Limber is divided into 3 "arrondissements" (Hasselt, Maaseik and Tongeren) and a total of 44 municipalities.
Population on 1 January or on 1 July of each year.
Limbourg
Limbourg or Limburg is a medieval city in the Belgian province of Liège. It was founded in the 11th century.
In 2007 its population was 5644.
It is located at 50° 37 North, 05° 56 East.
Limburg an der Lahn
Stinky could mean:
An illusion is a distortion of perception. The brain arranges, sorts, and organises data from the senses. Normally the system works well. Sometimes it does not, and we see illusions. In general, they are shared by most people in the same situation.
Illusions can happen with all five senses (taste, touch, sight, smell, and hearing), and some involve the way information from two senses is put together. Some illusions happen because of disorders, but generally, all normal people can sense the same illusion. An illusion is different from a hallucination; a halucination is sensing something which is not real, but an illusion is interpreting what we sense wrongly.
Optical illusions are the best known and understood. Because they are illusions common to most people, it follows that they are a product of the visual system. The visual system, from the retina to the visual cortex, is what is common to most humans.
These are illusions which are heard. The person listening hears sounds that aren’t really there, or sounds that can’t really happen. A Shepard tone is an auditory illusion.
They are when a person feels something that is not there, or something that should not be there but feels like it is. This happens sometimes when a person loses their arm. The person still feels like the arm is there. They might want to scratch the arm, or the arm might hurt them. This can happen with any limb of the body, and it is called the phantom limb.
Charcoal is a carbon-containing substance made from wood, naturally black and powdery. Charcoal is made from wood by heating it in an airless space at a high temperature. The wood will not burn, but instead turn into charcoal. The by-product of making charcoal is tar and turpentine.
People use it for different things such as cooking on a barbecue grill, and in painting.
Brose Baskets
Armenian Revolutionary Federation
The Armenian Revolutionary Federation (ARF or ՀՅԴ) (Armenian: – Hay Heghapokhakan Dashnaktsutiun, Dashnaktsutiun, – Dashnak or Tashnag) is an Armenian political party founded in Tiflis (Tbilisi in modern-day Georgia) in 1890 by Christapor Mikaelian, Stepan Zorian, and Simon Zavarian. The party works in Armenia and in countries where the Armenian diaspora is active, notably in Lebanon and the ethnically Armenian-dominated de facto Republic of Nagorno-Karabakh.
The Armenian Revolutionary Federation History Museum was created during an official ceremony Friday 2007 at Yerevan's Kristapor Mikaelian Center, with the party's leaders and supporters on hand to mark this momentous occasion.
Opened in 1946, the ARF History Museum was in Paris and during the years has collected more than 3,000 artifacts describing the party's history. After the ARF's return to Armenia, the museum and the ARF archives have been sent to Armenia.
Giro Manoyan is one of the leaders of ARF.
Christapor Mikaelian
Christapor Mikaelian (Armenian: ) also known by his "noms de guerre" Hellen (), Topal (), and Edward (), (1859-1905) was one of the three founders of the Armenian Revolutionary Federation along Stepan Zorian and Simon Zavarian, also part of Armenian national liberation movement.
Rosdom was born in the village of Agulis in Goghtn, now part of the Nakhchivan Autonomous Republic. He graduated from the Professorial academy of Tiflis and also attended the University of Moscow, where he met Simon Vratsian, another co-founder of the Armenian Revolutionary Federation.
Varazdat
Varasdates or Varazdat (, Varazdat) was an Armenian prince who succeeded his uncle King Papes as King of Armenia in 374.
Following the murder of King Papes, Valens sent Varazdat, a nephew of Pap, a young man highly reputed for his mental and physical gifts, to hold the Armenian throne. Shapur II, having failed on the battlefield, now proposed to Valens in 375 that Armenia be divided between the two powers. The Emperor rejected the proposal, but sent Victor Magistrianus to the Persian King to discuss the question. This emissary was cozened into exceeding the bounds of his authority and agreeing to the Persian proposal. In the meantime, the internal condition of Armenia was imperiled through friction between King Varazdat and the nakharars, culminating in the assassination of Musel Mamikonian, the leader of the latters' party. Manuel, the son of Musel, took up arms against the King and compelled him to flee from Armenia in 378, after four years of reign. Varazdat's life was saved, but the country was thrown into confusion. The Persians took advantage of the turmoil and invaded Armenia; but their occupation was a short-lived one. Shapur II died in 379, and the Persians evacuated in haste. Manuel, the dynamic Mamikonian, had rallied a formidable national force for action.
Adana massacre
Adana
Adana (Greek Άδανα) (the ancient "Antioch in Cilicia" or "Antioch on the Sarus") is the capital of Adana Province in Turkey. According to the 2000 census, with 1,130,710 inhabitants, it is the fifth most populous city of Turkey (after İstanbul, Ankara, İzmir and Bursa). The 2006 estimate of Adana's population is 1,271,894.
For most Turkish people, the word 'Adana' associates with Kebab, şalgam, cotton, oranges and very hot weather, in the awareness that Adana also embodies more than just these.
Adana is also named among the 25 "European Regions of the Future" for 2006/2007 by Foreign Direct Investment Magazine. Chosen alongside Kocaeli for Turkey, Adana scored the most points for cost effectiveness against Kocaeli's points for infrastructure development, while Adana and Kocaeli tied on points for the categories of human resources and quality of life.
Adana has a hot-summer Mediterranean climate ("Csa" in the Koeppen climate classification).
Parsley Massacre
In October 1937, Dominican dictator Rafael Leonidas Trujillo Molina ordered the execution of the Haitian population living within the borderlands with Haiti. The violence resulted in the killing of 17,000 to 35,000 Haitian civilians over a span of approximately five days. This would later become known as the Parsley Massacre.
Trujillo had made his actions for the Haitian community clear in a short speech given at a dance held in his honor on October 2, 1937 in Dajabón, stating:
Heat pump
A heat pump is a machine that moves heat from a cold place to a hot place.
A refrigerator is a heat pump. It moves heat from the inside to the outside. This keeps the food inside cold, so it will not spoil.
An air conditioner is a heat pump. It moves heat from the inside of a building to the outside.
A Peltier device is a heat pump. It moves heat from one side to the other by means of an electric current.
Some buildings are heated with heat pumps, also. In the winter, the heat pump moves heat from the outside to the inside. Sometimes this works better than heating with a radiator.
Usually, heat flows from a hot place to a cold place, according to the second law of thermodynamics. Heat will not move from a cold place to a warmer place by itself. Because of this, a heat pump must use extra energy to move the heat. This is sort of like pumping water uphill.
Most heat pumps use electric motors to provide energy. Some heat pumps use heat energy, supplied by a flame or an electric heater.
Most heat pumps use a refrigeration cycle. A refrigeration cycle uses a fluid which moves through tubes and carries the heat. The fluid is called a refrigerant. During the refrigeration cycle, the refrigerant changes from a liquid to a gas and back to a liquid.
When the refrigerant changes from a liquid to a gas, it gains (absorbs) heat energy. This is just like boiling. When the refrigerant changes from a gas back to a liquid, it loses heat energy.
The heat pump is set up so that the refrigerant gains heat from one place that will be cooled, and moves it to another place that will be warmed.
A heat pump forces the refrigerant to change from a gas to a liquid.
It uses a compressor to do this. Often, an electric motor drives the compressor. The compressor compresses the refrigerant, and this makes it change from a gas to a liquid. When the refrigerant changes from a gas to a liquid, it also gives up some of the heat that it has been carrying.
At the other end of the cycle, the refrigerant boils again. It changes from a liquid to a gas. But it needs heat to do this. When it takes up heat from its surroundings, it cools them down. So where the refrigerant is changing from a liquid to a gas, it feels cooler.
This is the complete cycle, from the cooling side to the heating side:
On the cooling side, heat is taken up to boil the refrigerant from a liquid to a gas. Then the fluid moves to the heating side.There, the compressor forces the refrigerant back to a liquid again. This makes it give up its heat. So heat has moved from the cooling side to the heating side. Then, the cycle repeats.
If the cooling side is the inside of a refrigerator, it gets cold.
If the cooling side is the inside of a building, and the warming side is the outside of the building, the inside of the building gets cold. This is how an air conditioner works.
If the cooling side is the outside of the building, and the warming side is the inside of the building, this is how a heat pump can heat a building during the winter.
Second law of thermodynamics
The second law of thermodynamics says that when energy changes from one form to another form, or matter moves freely, entropy (disorder) in a closed system increases.
Differences in temperature, pressure, and density tend to even out horizontally after a while. Due to the force of gravity, density and pressure do not even out vertically. Density and pressure on the bottom will be more than at the top.
Entropy is a measure of spread of matter and energy to everywhere they have access.
The most common wording for the second law of thermodynamics is essentially due to "Rudolf Clausius":
In other words, everything tries to maintain the same temperature over time.
There are many statements of the second law which use different terms, but all mean the same thing. Another statement by Clausius is:
Heat cannot of itself pass from a colder to a hotter body.
An equivalent statement by Lord Kelvin is:
A transformation whose only final result is to convert heat, extracted from a source at constant temperature, into work, is impossible.
The second law only applies to large systems. The second law is about the likely behavior of a system where no energy or matter gets in or out. The bigger the system is, the more likely the second law will be true.
In a general sense, the second law says that temperature differences between systems in contact with each other tend to even out and that work can be obtained from these non-equilibrium differences, but that loss of thermal energy occurs, when work is done and entropy increases. Pressure, density and temperature differences in an isolated system, all tend to equalize if given the opportunity; density and pressure, but not temperature, are affected by gravity. A heat engine is a mechanical device that provides useful work from the difference in temperature of two bodies.
Air conditioner
An air conditioner is a system or a machine that treats air in a defined, usually enclosed area via a refrigeration cycle in which warm air is removed and replaced with cooler air.
In construction, a complete system of heating, ventilation, and air conditioning is referred to as HVAC. Whether in homes, offices or vehicles, its purpose is to provide comfort by altering the properties of the air, usually by cooling the air inside.The main function of air conditioner is to change adverse temperature.
In the 19th century British scientist and inventor Michael Faraday discovered that compressing and liquefying ammonia could chill air when the liquefied ammonia was allowed to evaporate.
In 1842, American physician Dr. John Gorrie used compressor technology to create ice, which he used to cool air for his patients. He hoped eventually to use his ice-making machine to regulate the temperature of buildings and even considered cooling entire cities with a system of centralized air conditioning units.
Air conditioning engineers broadly divide air conditioning applications into "comfort" and "process".
Comfort applications aim to provide an indoor environment that remains relatively constant in a range preferred by humans despite changes in external weather conditions or in internal heat loads.
Process applications aim to provide a suitable environment for an industrial or a commercial process, regardless of internal heat loads and external weather conditions. Although often in the same comfort range, it is the requirements of  the process that determines conditions, not human preference. Process applications include:
Other examples include:
In both comfort and process applications, the objective is not only to control temperature (although in some comfort applications this is all that is controlled) but also factors like humidity, air movement and air quality.
In the refrigeration cycle, a pump transfers heat from a lower temperature source into a higher temperature heat sink. Heat will naturally flow in the opposite direction. This is the most common type of air conditioning.
A refrigerated air conditioning system works in much the same way pumping heat out of the room in which it stands.
This cycle takes advantage of the universal gas law "PV" = "nRT", where "P" is pressure, "V" is volume, "R" is the universal gas constant, "T" is temperature, and "n" is the number of molecules of gas (1 mole = 6.022×10 molecules).
The most common refrigeration cycle uses an electric motor to drive a compressor. In an automobile the compressor is driven by a pulley on the engine's crankshaft, with both using electric motors for air circulation. Since evaporation occurs when heat is absorbed, and condensation occurs when heat is released, air conditioners are designed to use a compressor to cause pressure changes between two compartments, and actively pump a coolant around an enclosed system. The cooling liquid, or refrigerant is pumped into the cooled compartment (the evaporator coil). Low pressure then causes the refrigerant to evaporate taking the heat with it. In the other compartment (the condenser), the refrigerant vapour is compressed and forced through another heat exchange coil, condensed into a liquid which then rejects the heat previously absorbed from the cooled space.
Air conditioning has as much influence on human health as any generic heating system.Poorly maintained air-conditioning systems (especially large, centralized systems) can occasionally promote the growth and spread of microorganisms such as "Legionella pneumophila," the infectious agent responsible for Legionnaire's disease. Air conditioning can have a positive effect on sufferers of allergies and asthma.
In serious heat waves, air conditioning can save the lives of the elderly. Some local authorities have even set up public cooling centers for the benefit of those without air conditioning at home.
One of the main conditions for the high-quality installation of HVAC equipment is the correct choice of the fixing location of the indoor and outdoor units. Each of the listed modules is distinguished by certain design characteristics, rules for future installation. To install an air conditioner, you need to take into account all the requirements thanks to which the equipment can be further operated in different modes.
You need to install an air conditioner, given the following nuances:
The installation of an air conditioner depends on certain criteria, it starts with finding the ideal site for mounting the outdoor unit. To do this, there are several recommendations:
Branch (disambiguation)
A branch is a part of a tree.
Branch or branching could also mean:
First law of thermodynamics
The first law of thermodynamics states that energy can neither be created nor destroyed; it can changed only from one form to another. The law forms the basis of the principle of conservation of energy. This means that anything that uses energy is changing the energy from one kind of energy to another. For example, exercising changes energy from food into kinetic (motion) energy. Another example: In the Sun (or any star), Nuclear Fusion changes mass into heat and light (Electromagnetic Radiation), which travels to Earth and is used by plants to create food (chemical energy) via photosynthesis, which can be eaten by animals allowing them to move (kinetic energy). Energy only ever changes its form; it is neither created nor destroyed. This is why Perpetual motion machines do not exist and could never exist; it would break a fundamental law of physics.
People can use the changes to do work that is useful. Examples of forms of energy in classical mechanics include heat, light, kinetic (movement) or potential energy. However, in modern physics it is considered that there are only two types of energy - mass and kinetic energy, although this may not be helpful to those not familiar with more complex physics.
The law means that the total energy of the universe (or any Closed system) is a constant. However, energy can be transferred from one part of the universe to another.
The most common wording of the first law of thermodynamics used by scientists is:
James Prescott Joule was the first person who found out by experiments that heat and work are convertible.
The first explicit statement of the first law of thermodynamics was given by "Rudolf Clausius" in 1850: "There is a state function E, called 'energy', whose differential equals the work exchanged with the surroundings during an adiabatic process."
In thermodynamics and engineering, it is natural to think of the system as a heat engine which does work on the surroundings, and to state that the total energy added by heating is equal to the sum of the increase in internal energy plus the work done by the system. Hence formula_1 is the amount of energy lost by the system due to work done by the system on its surroundings. During the portion of the thermodynamic cycle where the engine is doing work, formula_1 is positive, but there will always be a portion of the cycle where formula_1 is negative, e.g., when the working gas is being compressed. When formula_1 represents the work done by the system, the first law is written:
People disagree whether energy is a positive or a negative number. So that formula_6 is the flow of heat out of the system, and formula_1 is the work into the system:
Because of this ambiguity, it is very important in any discussion involving the first law to explicitly establish the sign convention in use.
dU = the change in internal energy
Q = heat
W = work
In physics, the conservation of energy is that energy can not be created or destroyed, it can only be changed from one form to another, such as when electrical energy is changed into heat energy. Formally, it says that the total amount of energy in an isolated system remains constant, although it may change forms, e.g. friction turns kinetic energy into thermal energy. In thermodynamics, the first law of thermodynamics is a statement of the conservation of energy for thermodynamic systems.
From a mathematical point of view, the energy conservation law is a consequence of the shift symmetry of time; energy conservation is a result of the empirical fact that the laws of physics do not change with time itself. Philosophically, this can be stated as "nothing depends on time per se (time itself)".
Ancient philosophers as far back as Thales of Miletus had the idea that there is some underlying substance of which everything is made. But that is not the same as our concept of "mass-energy" today (for example, Thales thought the underlying substance was water).
In 1638, Galileo published his analysis of several situations. This included the famous "interrupted pendulum". This can be described (in modernized language) as conservatively converting potential energy to kinetic energy and back again. However, Galileo did not explain the process in modern terms and had not understood the modern concept either. The German Gottfried Wilhelm Leibniz during 1676-1689 attempted a mathematical formulation of the kind of energy which is connected with "motion" (kinetic energy). Leibniz noticed that in many mechanical systems (of several masses, "m" each with velocity "v" ),
was conserved so long as the masses did not interact. He called this quantity the "vis viva" or "living force" of the system. The principle represents an accurate statement of the approximate conservation of kinetic energy in situations where there is no friction.
Meanwhile, in 1843 James Prescott Joule independently discovered the mechanical equivalent in a series of experiments. In the most famous, now called the "Joule apparatus", a descending weight attached to a string caused a paddle immersed in water to rotate. He showed that the gravitational potential energy lost by the weight in descending was approximately equal to the thermal energy (heat) gained by the water by friction with the paddle.
Over the period 1840-1843, similar work was carried out by engineer Ludwig A. Colding though it was little-known outside his native Denmark.
It is easy to see that
which is also
Assuming that formula_5 and that formula_6, then
Therefore, energy does not vary with time.
Differences between butterflies and moths
The Lepidoptera are the butterflies and moths. However, though the butterflies are a natural monophyletic group, moths are not. Butterflies are often put in the suborder Rhopalocera, which includes Papilionoidea (true butterflies), the Hesperiidae (skippers), and the Hedylidae (butterfly moths).
In Linnaean taxonomy, moths are usually put in the suborder Heterocera. This tends to cover up the fact that they are not a true natural monophyletic group. However, moths do look and behave rather different from butterflies, which explains why people came to call them by a different name.
Other taxonomic schemes have been proposed, but none of them is perfect. Both taxonomists and amateurs make use of the obvious differences between butterflies and moths.
The most obvious difference is in the feelers, or antennae. Most butterflies have thin slender filamentous antennae which are club shaped at the end. Moths, on the other hand, often have comb-like or feathery antennae, or filamentous and unclubbed. This distinction is the basis for the earliest taxonomic divisions in the Lepidoptera the Rhopalocera ("clubbed horn", the butterflies) and the Heterocera ("varied horn", the moths).
There are, however, exceptions to this rule and a few moths (the family Castniidae) have clubbed antennae. Some butterflies, like "Pseudopontia paradoxa" from the forests of central Africa, lack the clubbed ends. The "Hesperiids" often have an angle to the tip of the antenna.
Many moths have a "frenulum" or wing coupling physically attaching upper and lower parts of their wings together. The frenulum can be seen only when a specimen is in hand. There are various types. It may be a filament from the hindwing coupling with barbs on the forewing. Butterflies usually lack these structures. Their wing coupling is usually done by simple overlap of wing edges.
Most moth caterpillars spin a cocoon made of silk when they go into the pupal stage. Most butterflies on the other hand form an exposed pupa called a chrysalis.
There are many exceptions to this rule. Hawk moths form an exposed chrysalis which is underground. Gypsy moths sometimes form butterfly-style pupae, hanging on twigs or tree bark, although usually they create flimsy cocoons out of silk strands and a few leaves, partially exposing the chrysalis. A few Skipper butterfly larvae also make crude cocoons in which they pupate, exposing the pupa a bit. The "Parnassius" butterfly larvae make a flimsy cocoon for pupation and they pupate near the ground surface between debris.
Most butterflies have bright colours on their wings. Nocturnal moths on the other hand are usually plain brown, grey, white or black and often with obscuring patterns of zigzags or swirls which help camouflage them as they rest during the day. However many day-flying moths are brightly coloured, particularly if they are toxic. A few butterflies are quite plain, like the cabbage white butterfly.
Moths tend to have stout and hairy or furry-looking bodies. Butterflies on the other hand have slender and smoother abdomens. Moths have larger scales on their wings. These make them look more dense and fluffy. Butterflies on the other hand have fine scales. This difference is possibly due to the need for moths to conserve heat during the cooler nights whereas butterflies are able to absorb sunlight.
Most moths are nocturnal or crepuscular (active at night) while most butterflies are diurnal (active at daytime). There are however exceptions, including the diurnal gypsy moth and the spectacular "Uraniidae" or Sunset moths.
Moths usually rest with their wings spread out to their sides. Butterflies frequently fold their wings above their backs when they are perched although they will occasionally "bask" with their wings spread for short periods. However some butterflies, like the skippers, may hold their wings either flat or folded or even in-between (the so-called "jet plane" position) when perched. Most moths also occasionally fold their wings above their backs when they are in a certain spot (like when there is no room to fully spread their wings). A sometimes confusing family can be the "Geometridae" (such as the winter moth) because the adults often rest with their wings folded vertically. These moths have thin bodies and large wings like many butterflies but may be distinguished easily by structural differences in their antennae (e.g. bipectinate).
Monophyly
Monophyly means common descent from a single ancestor.
Biologists have introduced a kind of taxonomy called cladistics. The aim of this is to make biological classification fit what we know about the way organisms evolved.
If there is a group made of a common ancestor, and all its descendants, that group is monophyletic. (Greek: "of one race").
A group which contains organisms, without their common ancestor, is called polyphyletic. Convergent evolution is a usual cause of such groups. If a group contains the common ancestor, but leaves out some of its descendants, it is called paraphyletic. All living things on this planet are thought, on the basis of DNA analysis, to be monophyletic, that is, to have one origin, not many.
Example: all species in the genus "Homo" have come from the same ancestral form in the family Hominidae, and no other descendants are known. Thus the genus "Homo" is monophyletic.
If, on the other hand, it were discovered that "Homo habilis" had developed from a different ancestor from "Homo sapiens", and this ancestor were not included in the genus, then the genus would be polyphyletic. Since biologists by and large tend to prefer monophyletic groups, in this case, they would likely either split the genus or broaden it to include the additional forms.
Example of polyphyletic group: Sea slugs.
Sometimes taxonomists are frustrated fitting plant species into a monophyletic group because of polyploidy. There is clear evidence that some polyploid plant species are of multiple origins (the species has arisen more than once). For example, "Salsify", the hybrid goat's-beard, ("Tragopogon miscellus") has formed as many as 20 times in eastern Washington.
Also, it can happen that hybrids between two close plant species undergo polyploidy, and the polyploids continue as a new and distinct species. Situations like this are outside the normal rules of descent, and are dealt with by special decisions, guided by the International Commission of Botanical Nomenclature (ICBN).
The order Lepidoptera is the second biggest order of insects. It includes the moths and butterflies including the skippers. There is no common word for the group: ordinary people talk of "butterflies and moths".
The order has more than 180,000 species in 128 families and 47 superfamilies. They are 10% of all the described species of living organisms. The Coleoptera (the beetles) is the only order that has more species.
The name, Lepidoptera, comes from the Ancient Greek words "λεπίδος" (scale) and "πτερόν" (wing).
The earliest discovered fossils date to 200 mya or earlier. This early origin was long before flowering plants evolved. Earlier butterflies must have been adapted to a habitat of cycads and conifers, something which had not previously been suspected.
Lepidopterans go through complete metamorphosis. This means that they have a four parts to their lives. The first part is the egg. The second part is the caterpillar or larva. The third part is the pupa. The last part is the adult or imago.
The larvae have a tough head and a soft body. They have mouths that are made to chew. Some larvae are covered with hairs, or other body extensions. The larvae have three pairs of small legs on the thorax. These legs are called true legs. There are up to five pairs of bigger legs on the abdomen. These legs are called prolegs. Lepidopteran larvae can be confused with the larvae of sawflies. The difference between Lepidopteran larvae and sawfly larvae is that Lepidopteran larvae have tiny hooks on their prolegs. These hooks are called crochets. Most larvae are herbivores, but a few are carnivores and detritivores.
Adults have two pairs of wings. They are covered by small scales. In some species, the adults have very small wings or no wings at all. This is more common in females. Adults have antennae. Some moths have antennae that look like feathers. These feather-like antennae are larger in males than females. Adults have a mouthpart called a proboscis. It sucks nectar from flowers. Some adults do not have mouths and cannot feed. Others have different mouths that are made to pierce and suck blood or fruit juices.
Diurnal
Animals that are active during the day are called diurnal. They hunt or feed during the day and sleep during the night. Nocturnal animals do it the other way round.
Skipper (butterfly)
The skippers are a family of butterflies, the Hesperiidae. They are named after their quick, darting flight.
Skippers used to be classified in their own superfamily, Hesperioidea, because they have their antennae clubs hooked backward like a crochet while the other butterflies have club-like tips to their antennae. Skippers also have generally stockier bodies than regular butterflies, with stronger wing muscles.
There are about 3500 species of skippers. They are usually classified in the following subfamilies:
Many species of skippers look frustratingly alike. For example, some species in the genera "Erynnis", "Hesperia", and "Amblyscirtes" cannot currently be distinguished in the field even by experts. The only reliable method of telling them apart involving dissection and examination of the genitalia.
Energy conservation is reducing the amount of energy used for different purposes. This may result in an increase of financial capital, environmental value, national and personal security, and human comfort.
Individuals and organizations that consume energy may conserve energy to reduce costs and promote economic, political and environmental sustainability. Industrial and commercial users may want to increase efficiency and thus maximize profit.
On a larger scale, energy conservation is an energy policy. In general, energy conservation reduces the energy consumption and energy demand per capita. This reduces the rise in energy costs, and can reduce the need for new power plants, and energy imports. The reduced energy demand can provide more flexibility in choosing the methods of energy production.
By reducing emissions, energy conservation helps to prevent climate change. Energy conservation makes it easier to replace non-renewable resources with renewable energy. Energy conservation is often the most economical solution to energy shortages.
The U.S. is the largest consumer of energy, although at current levels of growth, China may become the leading energy consumer. The U.S. Department of Energy categorizes national energy use in four broad sectors: transportation, residential, commercial, and industrial.
Energy usage in the transportation and residential sectors (about half of U.S. energy consumption) is largely controlled by individual domestic consumers. Commercial and industrial energy usage are controlled by businesses. National energy policy has a significant effect on energy usage across all four sectors.
The transportation sector includes all vehicles used for personal or freight transportation. Of the energy used in this sector, about 65% is used by gasoline-powered vehicles, mostly personally owned. Diesel-powered transport (trains, merchant ships, heavy trucks, etc.) consumes about 20%, and air traffic consumes most of the remaining 15%.
The oil supply crises of the 1970s spurred the creation, in 1975, of the federal Corporate Average Fuel Economy (CAFE) program, which required auto manufacturers to meet progressively higher fleet fuel economy targets. The next decade saw dramatic improvements in fuel economy, mostly the result of reductions in vehicle size and weight. These gains eroded somewhat after 1990 due to the growing popularity of sport utility vehicles, pickup trucks and minivans, which fall under the more lenient "light truck" CAFE standard.
In addition to the CAFE program, the U.S. government has tried to encourage better vehicle efficiency through tax policy. Since 2002, taxpayers have been eligible for income tax credits for gas/electric hybrid vehicles. A "gas-guzzler" tax has been assessed on manufacturers since 1978 for cars with exceptionally poor fuel economy. While this tax remains in effect, it currently generates very little revenue as overall fuel economy has improved.
Another focus in gasoline conservation is reducing the number of miles driven. An estimated 40% of American automobile use is associated with daily commuting. Many urban areas offer subsidized public transportation to reduce commuting traffic, and encourage carpooling by providing designated high-occupancy vehicle lanes and lower tolls for cars with multiple riders. In recent years telecommuting has also become a viable alternative to commuting for some jobs.
A vehicle's gas mileage normally decreases rapidly at speeds above 55 miles per hour. A car or truck moving at 55 miles an hour can get about 15 percent better fuel economy than the same car going 65 mph. According to the U.S. Department of Energy (DOE), as a rule of thumb, each 5 mph you drive over 60 mph is similar to paying an additional $1.20 per gallon for gas (at $3.10 per gallon).
The residential sector refers to all private residences, including single-family homes, apartments, manufactured homes and dormitories. Energy use in this sector varies significantly across the country, due to regional climate differences and different regulation. On average, about half of the energy used in the U.S. homes is expended on space conditioning (i.e. heating and cooling).
The efficiency of furnaces and air conditioners has increased steadily since the energy crises of the 1970s. The 1987 National Appliance Energy Conservation Act authorized the Department of Energy to set minimum efficiency standards for space conditioning equipment and other appliances each year, based on what is "technologically feasible and economically justified".
Despite technological improvements, many American lifestyle changes have put higher demands on heating and cooling resources. The average size of homes built in the United States has increased significantly, from 1500 ft² in 1970 to 2300 ft² in 2005. The single-person household has become more common, as has central air conditioning: 23% of households had central air conditioning in 1978, that figure rose to 55% by 2001.
As a cheaper alternative to the purchase of a new furnace or air conditioner, most public utilities encourage smaller changes the consumer can make. Consumers have also been asked to adopt a wider indoor temperature range (e.g. 65 °F in the winter, 80 °F in the summer).
Energy usage in some homes may vary widely from these averages. In most residences no single appliance dominates, and any conservation efforts must be directed to numerous areas in order to achieve substantial energy savings. However, ground source heat pump systems are the more energy efficient, environmentally clean, and cost-effective space conditioning systems available (Environmental Protection Agency). They can achieve reductions in energy consumptions of up to 70%.
Current best practices in building design and construction result in homes that are much more energy conserving than average new homes. See Passive house, Superinsulation, Self-sufficient homes, Zero energy building, Earthship, Straw-bale construction, MIT Design Advisor, Energy Conservation Code for Indian Commercial Buildings.
Smart ways to construct homes such that minimal resources are used to cooling and heating the house in summer and winter respectively can significantly reduce energy costs!
The commercial sector consists of retail stores, offices (business and government), restaurants, schools and other workplaces. Energy in this sector has the same basic end uses as the residential sector, in slightly different proportions. Space conditioning is again the single biggest consumption area, but it represents only about 30% of the energy use of commercial buildings. Lighting, at 25%, plays a much larger role than it does in the residential sector. Lighting is also generally the most wasteful component of commercial use. A number of case studies indicate that more efficient lighting and elimination of over-illumination can reduce lighting energy by approximately fifty percent in many commercial buildings.
Commercial buildings can greatly increase energy efficiency by thoughtful design, with today's building stock being very poor examples of the potential of systematic (not expensive) energy efficient design (Steffy, 1997). Commercial buildings often have professional management, allowing centralized control and coordination of energy conservation efforts.
Solar heat loading through standard window designs usually leads to high demand for air conditioning in summer months. An example of building design overcoming this excessive heat loading is the Dakin Building in Brisbane, California, where fenestration was designed to achieve an angle with respect to sun incidence to allow maximum reflection of solar heat; this design also assisted in reducing interior over-illumination to enhance worker efficiency and comfort.
The industrial sector represents all production and processing of goods, including manufacturing, construction, farming, water management and mining. Increasing costs have forced energy-intensive industries to make substantial efficiency improvements in the past 30 years. For example, the energy used to produce steel and paper products has been cut 40% in that time frame, while petroleum/aluminum refining and cement production have reduced their usage by about 25%. These reductions are largely the result of recycling waste material and the use of cogeneration equipment for electricity and heating.
The energy required for delivery and treatment of fresh water often constitutes a significant percentage of a region's electricity and natural gas usage (an estimated 20% of California's total energy use is water-related.) In light of this, some local governments have worked toward a more integrated approach to energy and water conservation efforts.
Unlike the other sectors, total energy use in the industrial sector has declined in the last decade. While this is partly due to conservation efforts, it's also a reflection of the growing trend for U.S. companies to move manufacturing operations offshore.
The usage of telecommuting by major corporations is a significant opportunity to conserve energy, as many Americans now work in service jobs that enable them to work from home instead of commuting to work each day.
Cogeneration (also combined heat and power, CHP) is the use of a heat engine or a power station to make both electricity and useful heat at the same time.
Conventional power plants emit the heat created as a byproduct of electricity generation into the environment through cooling towers, as flue gas, or by other means. Combined heat and power captures the byproduct heat for domestic or industrial heating purposes, either very close to the plant, or - especially in Scandinavia and eastern Europe - for distribution through pipes to heat local housing.
Byproduct heat at moderate temperatures (100 to 180°C) can also be used in absorption chillers for cooling. A plant producing electricity, heat and cold is sometimes called regeneration or more generally: polygene ration plant.
Cogeneration is a thermodynamically efficient use of fuel. In separate production of electricity some energy is lost as waste heat, but in cogeneration this energy performs useful work (see energy).
Thermal power plants (including those that use fissile elements or burn coal, petroleum, or natural gas), and heat engines in general, do not convert all of their available energy into electricity. In most heat engines, a bit more than half is wasted as excess heat (see: Second law of thermodynamics). By capturing the excess heat, CHP uses heat that would be wasted in a conventional power plant, potentially reaching an efficiency of up to 70%, compared with at most 40% for the conventional plants. This means that less fuel needs to be consumed to produce the same amount of useful energy. Also, less pollution is produced for a given economic benefit.
An exact match between the heat and electricity needs rarely exists. A CHP plant can either meet the need for heat ("heat driven operation") or be run as a power plant with some use of its waste heat.
CHP is most efficient when the heat can be used on site or very close to it. Overall efficiency is reduced when the heat must be transported over longer distances. This requires heavily insulated pipes, which are expensive and inefficient; whereas electricity can be transmitted along a comparatively simple wire, and over much longer distances for the same energy loss.
A car motor becomes a CHP plant in winter, when the reject heat is useful for warming the interior of the vehicle. This example scores the point that deployment of CHP depends on heat uses in the neighbourhood of the heat engine.
Cogeneration plants are commonly found in district heating systems of big towns, hospitals, prisons, oil refineries, paper mills, wastewater treatment plants, thermal enhanced oil recovery wells and industrial plants with large heating needs.
Quakenbrück
Quakenbrück is a small town in Lower Saxony. It has about 13,000 inhabitants.
The dew point is the temperature where water vapor condenses into liquid water.
All air holds different amounts of water vapor. The dew point shows the amount of moisture in the air. The higher the dew point is, the higher the level of moisture in the air at a given temperature. The dew point of humid air will be higher than the dew point of dry air.
Condensation of water vapor starts when the temperature of air is lowered to its dew point and beyond. The dew point, like other measures of humidity, can be found from measurement taken by a hygrometer.
Podgorica
Región Autónoma del Atlántico Sur
The Región Autónoma del Atlántico Sur is an independent part of Nicaragua. It is often simply known as RAAS. Its capital is Bluefields. It was made when new regions were formed in Nicaragua in 1989. The old region was turned into Atlántico Sur and Atlántico Norte. The capital of Atlántico Norte is Puerto Cabezas. There is also a popular tourist place called Corn Island, which is about 45 km from the capital Bluefields
Región Autónoma del Atlántico Norte
Región Autónoma del Atlántico Norte is an autonomous region of Nicaragua. It was created in 1989. Its capital is Puerto Cabezas. Often the name is shotened to RAAN.
Compressor could mean:
Gas compressor
A gas compressor is a mechanical device that increases the pressure of a gas by reducing its volume. Compression of a gas naturally increases its temperature. When the gas is air, the machine is called an air compressor.