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China has many traditional festivals, such as the Chinese New Year, Dragon Boat Festival, Mid-Autumn Festival and so on. The most significant is Chinese New Year. Another important holiday is the National Day celebration around October. Weekends are moved around to make sure everyone has a week-long holiday for it, just like during the lunar new year.
Chinese New Year lasts fifteen days, including one week as a national holiday. It starts with the first day of the Chinese lunar year and ends with the full moon fifteen days later. It is always in the middle of winter, but is called the Spring Festival in Chinese because Chinese seasons are a little different from English ones. On the first day of the Chinese New Year, people call on friends and relatives. Because most people watch the special performances on CCTV all the night on New Year's Eve and don't go to bed until 12:00 AM, they usually get up later in the next day. The fifth day of the Chinese New Year is the day to welcome the god of Wealth (Chinese:财神爷), many people make and eat dumplings (Chinese:饺子. Pinyin: Jaozi). They believe that dumplings can hold the god of Wealth and bring luck. The last day of the Chinese New Year is the Lantern Festival. On this day, the moon becomes the full moon. People go out and watch the lantern festivals everywhere. After that, they eat sweet dumpling (Chinese:汤圆,元宵), a kind of dumpling which is round and looks like the full moon.
Dragon Boat Festival is celebrated to commemorate the death of Qu Yuan, a patriotic poet of the State of Chu during the Warring States period. He persuaded his emperor not to accept Qin's diplomats's offers several times but his emperor did not listen to him. He was very sad and ended up jumping into the river to end his life. The people loved him so much that they did not want the fish to eat his corpse. They made and threw rice dumplings into the river. They hope the fish eat these dumplings instead of the poet's corpse. They also rowed dragon boats in the river to get rid of the fish. Eating rice dumplings and holding dragon boat races, became what the Chinese do in this festival nowadays.
Held on the fifteenth day of the eighth lunar month, the Mid-Autumn Festival is a festival for families. Now when the festival sets in, people sit together to eat moon cakes, appreciate the moon and the moon itself, celebrate the bumper harvest, and enjoy the family love and happiness. To the Chinese people, the full moon symbolizes family reunion, as do the moon cakes. Hence why the Mid-Autumn Festival is also called the Family Reunion Festival.
Trains are commonly used for moving from one place to another, mainly for long distances. Bullet trains are faster and more common in the cities. China has more high-speed trains than any other country in the world. Buses and air transport are also very common.
Psychoneuroimmunology
Psychoneuroimmunology (PNI) is the study of the interaction between psychological processes and the nervous and immune systems of the human body. PNI takes an interdisciplinary approach.
The main interests of PNI are the interactions between the nervous and immune systems and the relationships between mental processes and health.
Interest in the relationship between psychiatric syndromes or symptoms and immune function has been a consistent theme since the beginning of modern medicine.
Claude Bernard, a French physiologist, founded the concept milieu interieur in the mid 1800s. In 1865, Bernard described the perturbation of this internal state “… there are protective functions of organic elements holding living materials in reserve and maintaining without interruption humidity, heat and other conditions indispensable to vital activity. Sickness and death are only a dislocation or perturbation of that mechanism." (Bernard, 1865)
Walter Cannon, a professor of physiology at Harvard University coined the term homeostasis in his book "The Wisdom of the Body" in 1932. In his work with animals Cannon observed that any change of emotional state in the beast, such as anxiety, distress, or rage was accompanied by total cessation of movements of the stomach (Bodily Changes in Pain, Hunger, Fear and Rage, 1915). These studies into the relationship between the effects of emotions and perceptions on the autonomic nervous system, the responses that led to the freeze, fight or flight response.
In 1975 Robert Ader and Nicholas Cohen advanced PNI with a demonstration of classic conditioning of the immune function, and coined the term "psychoneuroimmunology". Ader was investigating how long conditioned responses might last in laboratory rats. The highly reproducible results showed that conditioned rats exposed to the conditioned stimulus were immuno suppressed. In other words, a signal via the nervous system (taste) was affecting immune function. This was one of the first scientific experiments that demonstrated that the nervous system can affect the immune system.
In 1981 David Felten, then working at the Indiana University of Medicine, discovered a network of nerves leading to blood vessels as well as cells of the immune system. The researchers also found nerves in the thymus and spleen terminating near clusters of lymphocytes, macrophages and mast cells, all of which help control immune function. This discovery provided one of the first indications of how neuro-immune interaction occurs.
Ader, Cohen and Felten went on to edit the groundbreaking book "Psychoneuroimmunology" in 1981, which laid out the underlying premise that the brain and immune system represent a single, integrated system of defense.
Stressors can produce profound health consequences. In one epidemiological study, for example, all-cause mortality increased in the month following a severe stressor – the death of a spouse. Theorists propose that stressful events trigger cognitive and affective responses which, in turn, induce sympathetic nervous system and endocrine changes. These ultimately impair immune function. Potential health consequences are broad, but include rates of infection, HIV progression, and cancer incidence and progression.
Political party
A political party is an organized group of people or bodies who seek to capture political power through an election in order to run the affairs of a country. It often puts forward candidates for public office. In a democracy, leaders must "run for office" in an election. In a dictatorship, there is generally only one party allowed, that can approve a new leader without non-members having a choice.
A political party is similar to a faction, and can be the same thing. In some systems, members of one party in the legislature are all expected to vote the same way. The laws written by the party or faction with the majority of votes become adopted by the country, so this means whatever party is elected to over half the seats, gets to run the government. The next largest party is often called the "opposition". Sometimes when there are more than two parties with seats, no one party has over half of the seats. Then two or more parties might join together to form what is called a "coalition".
Some parties are formed around a single issue or interest group. Others form policies to address all matters of government, known as a "platform".
Many political parties have a set of ideas and beliefs (called its "ideology"). People often describe these ideologies using words such as "conservative" and "liberal".
Common ideologies include environmentalism, socialism (ranging from social democracy to Marxism and Communism), conservatism, democracy, liberalism, and nationalism.
Political parties can be against the law in some places. When some parties get a lot of power, they can make all other political parties illegal. For example, the Nazi Party did this in Germany, and the Communist Party did it in several countries. Some countries make extreme-right parties illegal (such as Vlaams Blok in Belgium). At other times, countries have outlawed far-left parties. For example, West Germany banned the Communist Party in 1956.
A handful of countries like China, North Korea and Cuba still have one-party dictatorships. In a few other dictatorships, such as Saudi Arabia, all political parties are banned and there is no parliament at all.
In all big democratic countries, parties are very important. But there are a few very small countries, such as the island of Jersey, where most politicians do not belong to any party and where parties do not matter much.
In some democracies, there are only two big political parties. For example, in the United States, there is the Democratic Party and the Republican Party. Some other parties exist but are very small and do not hold seats in Congress.
In other countries there are larger numbers of parties. In the German federal Parliament (or Bundestag), six parties have seats. In the United Kingdom, there are two big parties, one medium-sized party, and many small ones.
Page
A page can be different things:
Pet
A pet is a domesticated animal that lives with people, but is not forced to work and is not eaten, in most instances. In most cases, a pet is kept to entertain people or for companionship. Some pets such as dogs and cats are placed in an animal shelter if there is no one willing to take care of them. If no one adopts it or the pet is too old/sick, the pet may be euthanized.
Dogs, cats, fish, rodents, lagomorphs, ferrets, birds, certain reptiles and amphibians, and a wide variety of arthropods such as tarantulas and hermit crabs are the most common pets in North America. Horses, elephants, oxen, and donkeys are usually made to work, so they are not usually called pets. Some dogs also do work for people, and it was once common for some birds (like falcons and carrier pigeons) to work for humans.
Rodents are also very popular pets. The most common are guinea pigs, rabbits, hamsters (especially Syrian and dwarf hamsters), mice and rats.
Product
A product can mean a few things:
Program
The term Program can be used in many ways.
Platonic realism
Platonic realism is the theory of reality developed by Plato, and explained in his theory of Forms. Platonic realism states that the visible world of particular things is a shifting exhibition, like shadows cast on a wall by the activities of their corresponding universal Ideas or Forms. Whereas the visible world of particulars is unreal, the Forms occupy the unobservable yet true reality and are real.
Platonism is a similar, yet sometimes modified, view of reality.
Among the natural philosophers in ancient Greece, the problem of universals was the mystery of where particular things derive their traits that we perceive as universals—for instance "red" or "apple" or "good" or "woman" or "truth".
Plato explained that the particular things of the visible world are imperfect, transient copies of the universal Ideas that are the perfect, lasting Forms. Existing exist outside space and time, the Forms are the universals and act as templates from which particulars manifest.
In his "Metaphysics", Aristotle, a student of Plato, explained that Socrates and his own student Plato held it significant that the world is in flux, much as Heraclitus had commented, "You cannot step into the same river twice", a theme of the Eleatics, a group of pre-socratic philosophers.
Plato considered that only the mind could access the timeless reality of truths, the realm of the Forms casting the visible world. Plato's metaphorical allegory of the cave—whereby humans only know reality as shadows of the real things they see interacting on a wall—suggests the practical consequences of Platonic realism as to "natural philosophy" in its endeavor to explain the natural world and as to values in human society. (Value theory comprises ethics, aesthetics, and political philosophy.)
Plato had led the focused application of geometry, developed by Euclid, to explain the natural world. Yet by his view of nature, Plato regarded astronomy as similar to seeking a theoretical proof in geometry—abstract and not the real world—whereupon the mind's insights derived from a quest to hold other truths through the mind's probing of ethics and aesthetics would yield discovery of truths within the realm of Forms, outside space and time.
Aristotle, a student of Plato, answered the problem of universals differently. Aristotle explained that universals are concepts corresponding to traits borne and shared by the particular things themselves. Aristotle did not regard all reality as visible, as he recognized existence of souls, yet regarded souls as unobserved parts of the visible world, real in itself. Aristotelianism largely shaped the course of Western thought.
Aristotle developed a more or less full description and explanation of the natural world and developed logic—syllogistic logic—to derive conclusions of the relations among things. Aristotle's grounding in the visible world was a metaphysical approach that suggested what evolved by some 2 000 years later into empirical science.
Some mathematicians and physicists are Platonists, for instance Max Tegmark and Roger Penrose. Yet today's Platonists usually view entities within the visible world as real, and simply regard universal abstractions like numbers, sets, propositions, and geometry as corresponding to real and timeless entities that also exist, though "pure" Platonists regard only the Forms or their realm as real.
By way of string theory and the holographic principle, some physicists conjecture that Plato's allegory of the cave approximates the natural world's structure. Tegmark, who regards only the mathematical structure of the universe as real, has been called a "radical" Platonist.
Paradox
A paradox is a sentence in logic that cannot be true but also cannot be false. It is self-contradictory. Many famous problems of this kind exist.
A famous paradox is called the liar's paradox. It is the simple sentence "This sentence is a lie", or equivalently, "This statement is false."
If the sentence is true, then it is a lie as it says. But if it is a lie, it cannot be true. A lie cannot also be a truth. So the sentence being true makes it a lie.
On the other hand, if the sentence is a lie, then it is not as it says: it is true. But that is just what the sentence says, which makes the content of the sentence true. So the sentence being a lie makes it true.
This paradox is not just in English, but in any language. It is true of mathematics as well. Paradox can never be removed from any symbol system that makes claims about itself.
Another example is the statement that "there is no cabal". Only a cabal can know if there is no cabal, so this is either a guess, or, it is a cabal trying to pretend it does not exist.
Not all paradoxes are true logical paradoxes, since they can also be common-sense-defying statements that appear true. Some famous examples of this kind of paradox include:
A paradox can also arise in ethics. Assuming power over others may sometimes be required to protect them while diminishing their right to autonomy. This is defined as an , which means "a paradox arising in ethics". Similarly, an ethical dilemma may be resolved by re-framing of the problem to reveal the false contradiction.
Because a paradox forces one to think "out of the box" about possibilities other than true or false in logic, right or wrong in morality, it is often brought up for educational purposes. People who do not see a paradox where others do are likely to be too certain that they are right.
Potato
A potato is a vegetable, the "Solanum tuberosum". It is a small plant with large leaves. The part of the potato that people eat is a tuber that grows under the ground.
A potato contains a lot of starch and other carbohydrates. Potato usually has a light-brown or yellowish skin and is white or yellow inside. If the potato gets light on it, the tuber turns green and will be poisonous.
The potato is originally from the high and cool areas of the Andes mountains. It was grown as a food crop thousands of years ago. When Spanish conquistadores came to South America in the 1500s they took potatoes back to Europe.
It took nearly 200 years for the potato to become a widely grown crop. In the 1780s the farmers in Ireland began growing potatoes because they grew well in the poor soils. They also have most of the vitamins that people need to live. When a potato plague destroyed the crop in 1845 the Irish Potato Famine killed many people.
The potato plant is now grown in many different parts of the world. Captain William Bligh planted potatoes on Bruny Island, Tasmania in 1792. In Australia they are now the largest vegetable crop.
The English word "potato" comes from the Spanish word "patata". The Royal Spanish Academy says the Spanish word is a hybrid of the Taíno ('sweet potato') and the Quechua ('potato').
Scientists in Germany have used genetic engineering to make a potato called the Amflora, which could be grown to make starch for making other things in factories.
Potatoes are almost always eaten cooked. People cook potatoes by boiling, baking, roasting, or frying them. French fries or "chips" are potatoes cut into long pieces and fried until they are soft. Potato chips, often called crisps, are potatoes cut into very thin round pieces and fried until they are hard.
William Shakespeare wrote that the potato was an aphrodisiac, but there is no evidence to show this is true.
Plant
Plants are one of six big groups (kingdoms) of living things. They are autotrophic eukaryotes, which means they have complex cells, and make their own food. Usually they cannot move (not counting growth).
Plants include familiar types such as trees, herbs, bushes, grasses, vines, ferns, mosses, and green algae. The scientific study of plants, known as botany, has identified about 350,000 extant (living) species of plants. Fungi and non-green algae are not classified as plants.
Most plants grow in the ground, with stems in the air and roots below the surface. Some float on water. The root part absorbs water and some nutrients the plant needs to live and grow. These climb the stem and reach the leaves. The evaporation of water from pores in the leaves pulls water through the plant. This is called transpiration.
A plant needs sunlight, carbon dioxide, minerals and water to make food by photosynthesis. A green substance in plants called chlorophyll traps the energy from the Sun needed to make food. Chlorophyll is mostly found in leaves, inside plastids, which are inside the leaf cells. The leaf can be thought of as a food factory. Leaves of plants vary in shape and size, but they are always the plant organ best suited to capture solar energy. Once the food is made in the leaf, it is transported to the other parts of the plant such as stems and roots.
The word "plant" can also mean the action of putting something in the ground. For example, farmers plant seeds in the field.
Photosynthesis is a process that is taken place by the leaves on the plant. The leaves are the only parts of a plant that can do this process (as they adapted). This is also known as how the plant gets its food.You can make the process quicker by adding more CO2, light and chlorophyll.
Green algae:
Land plants (embryophyte)
At least some plant cells contain photosynthetic organelles (plastids) which enable them to make food for themselves. With sunlight, water, and carbon dioxide, the plastids make sugars, the basic molecules needed by the plant. Free oxygen (O) is produced as a by-product of photosynthesis.
Later, in the cell cytoplasm, the sugars may be turned into amino acids for proteins, nucleotides for DNA and RNA, and carbohydrates such as starch. This process needs certain minerals: nitrogen, potassium, phosphorus, iron and magnesium.
Plant nutrition is the study of the chemical elements that are necessary for plant growth.
Macronutrients:
Micronutrients (trace elements) include:
The roots of plants perform two main functions. First, they anchor the plant to the ground. Second, they absorb water and various nutrients dissolved in water from the soil. Plants use the water to make food. The water also provides the plant with support. Plants that lack water become very limp and their stems cannot support their leaves. Plants which specialise in desert areas are called xerophytes or phreatophytes, depending on the type of root growth.
Water is transported from the roots to the rest of the plant through special vessels in the plant. When the water reaches the leaves, some of it evaporates into the air. Many plants need the help of fungi to make their roots work properly. This plant/fungi symbiosis is called mycorrhiza. Rhizobia bacteria in root nodules help some plants get nitrogen.
Flowers are the reproductive organ only of "flowering" plants (Angiosperms). The petals of a flower are often brightly colored and scented to attract insects and other pollinators. The stamen is the male part of the plant. It is composed of the "filament" (a stalk) that holds the anther, which produces the pollen. Pollen is needed for plants to produce seeds. The carpel is the female part of the flower. The top part of the carpel contains the stigma. The style is the neck of the carpel. The ovary is the swollen area at the bottom of the carpel. The ovary produces the seeds. The sepal is a leaf that protects a flower as a bud.
The process by which pollen gets transferred from one flower to another flower is called pollination. This transfer can happen in different ways. Insects such as bees are attracted to bright, scented flowers. When bees go into the flower to gather nectar, the spiky pollen sticks to their back legs. The sticky stigma on another flower catches the pollen when the bee lands or flies nearby it.
Some flowers use the wind to carry pollen. Their dangling stamens produce lots of pollen that is light enough to be carried by the wind. Their flowers are usually small and not highly coloured. The stigmas of these flowers are feathery and hang outside the flower to catch the pollen as it falls.
A plant produces many spores or seeds. Lower plants such as moss and ferns produce spores. The seed plants are the Gymnosperms and Angiosperms. If all the seeds fell to the ground besides the plant, the area might become overcrowded. There might not be enough water and minerals for all the seeds. Seeds usually have some way to get to new places. Some seeds can be dispersed by the wind or by water. Seeds inside juicy fruits are dispersed after being eaten. Sometimes, seeds stick to animals and are dispersed that way.
The question of the earliest plant fossils depends on what is meant by the word "plant".
By the Silurian, fossils of whole plants are preserved, including the lycophyte "Baragwanathia". From the Devonian, detailed fossils of rhyniophytes have been found. Early fossils of these ancient plants show the individual cells within the plant tissue. The Devonian period also saw the evolution of the first tree in the fossil record, "Wattezia". This fern-like tree had a trunk with fronds, and produced spores.
The coal measures are a major source of Palaeozoic plant fossils, with many groups of plants in existence at this time. The spoil heaps of coal mines are the best places to collect; coal itself is the remains of fossilised plants, though structural detail of the plant fossils is rarely visible in coal. In the Fossil Forest at Victoria Park in Glasgow the stumps of "Lepidodendron" trees are found in their original growth positions.
Prediction
A prediction is a statement that someone makes about what they think is going to happen. It is often very helpful to know what is going to happen to help prepare for these future events. Predictions are based on the idea that two beginning positions that are like each other will have similar results. By watching something happen, it is possible to predict what will happen if something similar happens. Predictions are given by science or fortune tellers or horoscopes.
The most common example of a prediction is the weather forecast. Studying how weather happens lets people predict what the weather will be by looking at what is currently happening. This is helpful because by knowing that it is going to rain, a person can wear the right clothes for it.
Nostradamus has made many predictions about the future.
Probability
Probability is a part of applied mathematics. It has to do with chance, the study of things that might happen or might not happen.
For example, using probability, one can show that by throwing a coin up in the air and letting it land, half of the time it will land with one side facing up, and half of the time with the other side facing up. Many coins have a picture of the face of a famous person on one side, and something else on the other side. Often people call the side with the face "heads", and the other side "tails".
The probability (p) of an event "E", written formula_1, is always between zero (impossible) and one (certain).
If we roll a die (plural: dice), then the chance that it will land on 1 is 1/6 (because there are 6 numbers on a die). Similarly, the chance it will land on 2 is also 1/6. The chance it will land on any number between 1 and 6 is 1, because every time we roll the die, it will always land on a number between 1 and 6.