Avoidant personality disorder (AvPD) is a Cluster C personality disorder. Those affected display a pattern of severe social anxiety, social inhibition, feelings of inadequacy and inferiority, extreme sensitivity to negative evaluation and rejection, and avoidance of social interaction despite a strong desire for intimacy. The behavior is usually noticed by early adulthood and occurs in most situations. People with AvPD often consider themselves to be socially inept or personally unappealing and avoid social interaction for fear of being ridiculed, humiliated, rejected, or disliked. They generally avoid becoming involved with others unless they are certain they will be liked. As the name suggests, the main coping mechanism of those with AvPD is an avoidance of feared stimuli. Childhood emotional neglect (in particular, the rejection of a child by one or both parents) and peer group rejection are associated with an increased risk for its development; however, it is possible for AvPD to occur without any notable history of abuse or neglect. Some researchers have theorized certain cases of AvPD may occur when individuals with innately high sensory processing sensitivity (characterized by deeper processing of physical and emotional stimuli, alongside high levels of empathy) are raised in abusive, negligent or otherwise dysfunctional environments, which inhibits their ability to form secure bonds with others.
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Surface tension may be the tendency of liquid surfaces to reduce into the minimum amount surface area achievable. Surface tension permits bugs (e.g. normal water striders), typically denser than drinking water, to float and slip on a normal water surface.
At liquid-air interfaces, area tension effects from the higher appeal of liquid substances to one another (because of cohesion) than to the substances in the weather (because of adhesion). The web effect can be an inward pressure at its surface area that triggers the water to work as if its area were covered having a stretched stretchy membrane. Thus, the top comes under anxiety through the imbalanced forces, that is probably where in fact the term “surface pressure” originated from. Due to the relatively high fascination of water substances to one another through a website of hydrogen bonds, drinking water has an increased surface pressure (72.8 millinewtons per meter at 20 ? C) than almost every other liquids. Surface stress is an essential aspect of the sensation of capillarity.
Surface tension gets the dimension of power per unit period, or of vitality per unit region. The two will be equivalent, however, when referring to electricity per product of the area, it’s quite common to use the word surface energy, which really is a more general word in the feeling that it can be applied and to solids.
In materials technology, surface tension can be used for either surface area stress or surface area energy.
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The sympathetic nervous system (SNS) is one of the two main divisions of the autonomic nervous system, the other being the parasympathetic nervous system. (The enteric nervous system (ENS) is now usually referred to as separate from the autonomic nervous system since it has its own independent reflex activity.)The autonomic nervous system functions to regulate the body’s unconscious actions. The sympathetic nervous system’s primary process is to stimulate the body’s fight-flight-or-freeze response. It is, however, constantly active at a basic level to maintain homeostasis hemodynamics. The sympathetic nervous system is described as being antagonistic to the parasympathetic nervous system which stimulates the body to “feed and breed” and to (then) “rest-and-digest”.
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Attachment theory is a psychological model attempting to describe the dynamics of long-term and short-term interpersonal relationships between humans. “Attachment theory is not formulated as a general theory of relationships; it addresses only a specific facet”: how human beings respond in relationships when hurt, separated from loved ones, or perceiving a threat. Provided any caregiver, all infants become attached—however, individual differences in the quality of the relationships remain significant.
In infants, attachment as a motivational and behavioral system directs the child to seek proximity with the parent when they are alarmed, with the expectation they will receive protection and emotional support.
John Bowlby believed that the tendency for primate infants to develop attachments to their progenitors was the result of evolutionary pressures since attachment behavior would facilitate the infant’s survival in the face of dangers such as predation or exposure to the elements. The most important tenet of attachment theory is an infant needs to develop a relationship with at least one parent for the child’s successful social and emotional development, and in particular for learning how to regulate their feelings. Any parent is likely to become the principal attachment figure if they provide most of the childcare and related social interaction. In the presence of a sensitive and responsive parent, the infant will use the latter as a “safe base” from which to explore.
This relationship can be dyadic, as in the mother-child dyad often studied in Western culture, or it can involve a community of caregivers (siblings/extended family/teachers) as can be seen in areas of Africa and South America. It should be recognized “even sensitive caregivers get it right only about fifty percent of the time. Their communications are either out of sync or mismatched. There are times when parents feel tired or distracted. The telephone rings or there is breakfast to prepare. In other words, attuned interactions rupture quite frequently. But the hallmark of a sensitive caregiver is that the ruptures are managed and repaired.”Attachments between infants and caregivers form even if this caregiver is not sensitive and responsive in social interactions with them. This has important implications. Infants cannot exit unpredictable or insensitive caregiving relationships. Instead, they must manage themselves as best they can in such relationships.
Based on her established Strange Situation Protocol, research by developmental psychologist Mary Ainsworth in the 1960s and 1970s found children will have different patterns of attachment depending on how they experienced their early caregiving environment. Early patterns of attachment, in turn, shape—but do not determine—the individual’s expectations in later relationships. Four different attachment classifications have been identified in children:
Secure attachment occurs when children feel they can rely on their caregivers to attend to their needs of proximity, emotional support, and protection. It is considered to be the most advantageous attachment style.
Anxious-ambivalent attachment occurs when the infant feels separation anxiety when separated from the caregiver and does not feel reassured when the caregiver returns to the infant.
Anxious-avoidant attachment occurs when the infant avoids their parents.
Disorganized attachment occurs when there is a lack of attachment behavior. In the 1980s, the theory was extended to attachment in adults. Attachment applies to adults when adults feel close attachment to their parents, their romantic and platonic partners and their friends.
Attachment theory has become the dominant theory used today in the study of infant and toddler behavior and in the fields of infant mental health, treatment of children, and related fields.
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Sexual tension is a social phenomenon that occurs when two individuals interact and one or both feel sexual desire, but the consummation is postponed or never happens. A common scenario is where the two individuals function in proximity, such as co-workers or in a group of friends, but do not have sex to avoid awkwardness or for other reasons. Sexual tension doesn’t have anything to do with the actual act of sex but is everything that leads up to it.Sexual tension can also occur when two individuals have previously had sexual relations and still feel an attraction towards each other, but do not wish to have sex again for fear of its effect on their current social situation (such as maintaining a relationship with a different partner). It can also be felt in situations when two individuals have a relationship devoid of physical contact, as in a long-distance relationship.
Sexual tension often occurs between individuals when the relationship is close and often flirtatious, yet the two people involved adamantly deny their feelings for each other. Meanwhile, it can appear extremely obvious to other friends or co-workers that such tension is present between the two individuals. When people give in to sexual tension, the relationship can become complicated and awkward if no new relationship level is established, as the relationship that existed before is no longer valid.
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This is a table of surface tension values for some interfaces at the indicated temperatures. Note that the SI units millinewtons per meter (mN·m−1) are equivalent to the cgs units dynes per centimeter (dyn·cm−1).
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The autonomic nervous system (ANS), formerly the vegetative nervous system, is a division of the peripheral nervous system that supplies smooth muscle and glands, and thus influences the function of internal organs. The autonomic nervous system is a control system that acts largely unconsciously and regulates bodily functions such as the heart rate, digestion, respiratory rate, pupillary response, urination, and sexual arousal. This system is the primary mechanism in control of the fight-or-flight response.
Within the brain, the autonomic nervous system is regulated by the hypothalamus. Autonomic functions include control of respiration, cardiac regulation (the cardiac control center), vasomotor activity (the vasomotor center), and certain reflex actions such as coughing, sneezing, swallowing and vomiting. Those are then subdivided into other areas and are also linked to ANS subsystems and nervous systems external to the brain. The hypothalamus, just above the brain stem, acts as an integrator for autonomic functions, receiving ANS regulatory input from the limbic system to do so. The autonomic nervous system has three branches: the sympathetic nervous system, the parasympathetic nervous system, and the enteric nervous system. Some textbooks do not include the enteric nervous system as part of this system. The sympathetic nervous system is often considered the “fight or flight” system, while the parasympathetic nervous system is often considered the “rest and digest” or “feed and breed” system. In many cases, both of these systems have “opposite” actions where one system activates a physiological response and the other inhibits it. An older simplification of the sympathetic and parasympathetic nervous systems as “excitatory” and “inhibitory” was overturned due to the many exceptions found. A more modern characterization is that the sympathetic nervous system is a “quick response mobilizing system” and the parasympathetic is a “more slowly activated dampening system”, but even this has exceptions, such as in sexual arousal and orgasm, wherein both play a role. There are inhibitory and excitatory synapses between neurons. Relatively recently, a third subsystem of neurons that have been named non-noradrenergic, non-cholinergic transmitters (because they use nitric oxide as a neurotransmitter) have been described and found to be integral in autonomic function, in particular in the gut and the lungs. Although the ANS is also known as the visceral nervous system, the ANS is only connected with the motor side. Most autonomous functions are involuntary but they can often work in conjunction with the somatic nervous system which provides voluntary control.
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Elizabeth II (Elizabeth Alexandra Mary Windsor; born 21 April 1926) is Queen of the United Kingdom and the other Commonwealth realms. Elizabeth was born in London as the first child of the Duke and Duchess of York, later King George VI and Queen Elizabeth, and she was educated privately at home. Her father acceded to the throne on the abdication of his brother King Edward VIII in 1936, from which time she was the heir presumptive. She began to undertake public duties during the Second World War, serving in the Auxiliary Territorial Service. In 1947, she married Prince Philip, Duke of Edinburgh, a former prince of Greece and Denmark, with whom she has four children: Charles, Prince of Wales; Anne, Princess Royal; Prince Andrew, Duke of York; and Prince Edward, Earl of Wessex.
When her father died on February 1952, Elizabeth became head of the Commonwealth and queen regnant of seven independent Commonwealth countries: the United Kingdom, Canada, Australia, New Zealand, South Africa, Pakistan, and Ceylon. She has reigned as a constitutional monarch through major political changes, such as devolution in the United Kingdom, Canadian patriation, and the decolonization of Africa. Between 1956 and 1992, the number of her realms varied as territories gained independence, and as realms, including South Africa, Pakistan, and Ceylon (renamed Sri Lanka), became republics. Her many historic visits and meetings include a state visit to the Republic of Ireland and visits to or from five popes. Significant events have included her coronation in 1953 and the celebrations of her Silver, Golden, and Diamond Jubilees in 1977, 2002, and 2012 respectively. In 2017, she became the first British monarch to reach a Sapphire Jubilee. She is the longest-lived and longest-reigning British monarch as well as the world’s longest-serving female head of state, oldest living monarch, the longest-reigning current monarch, and the oldest and longest-serving current head of state.
Elizabeth has occasionally faced republican sentiments and press criticism of the royal family, in particular after the breakdown of her children’s marriages, her annus horribilis in 1992 and the death in 1997 of her former daughter-in-law Diana, Princess of Wales. However, in the United Kingdom support for the monarchy has been and remains consistently high, as does her personal popularity.
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Tension headache, also called tension-type throbbing headache (TTH), may be the most common kind of primary head ache. The discomfort can radiate from the low back of the top, the neck, eye or other muscles in the torso typically impacting on both attributes of the top. Tension-type headaches take into account nearly 90% of most headaches.
Pain medication, such as for example aspirin and ibuprofen, work for the treating tension throbbing headache. Tricyclic antidepressants seem to be useful for reduction. Evidence is weak for SSRIs, propranolol and muscle tissue relaxants.By 2016 tension problems influence about 1.89 billion men and women and are more prevalent in girls than adult males (23% to 18% respectively).
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The Chernobyl disaster was a nuclear accident that occurred on 26 April 1986 at the No. 4 nuclear reactor in the Chernobyl Nuclear Power Plant, near the city of Pripyat in the north of the Ukrainian Soviet Socialist Republic. It is considered the worst nuclear disaster in history and is one of only two nuclear energy disasters rated at seven—the maximum severity—on the International Nuclear Event Scale, the other being the 2011 Fukushima Daiichi nuclear disaster in Japan.
The accident started during a safety test on an RBMK-type nuclear reactor, which was commonly used throughout the Soviet Union. The test was a simulation of an electrical power outage to aid the development of a safety procedure for maintaining cooling water circulation until the back-up generators could provide power. This operating gap was about one minute and had been identified as a potential safety problem that could cause the nuclear reactor core to overheat.
Three such tests had been conducted since 1982, but had failed to provide a solution. On this fourth attempt, the test was delayed by 10 hours, so the operating shift that had been prepared was not present. The test supervisor then failed to follow procedure, creating unstable operating conditions that, combined with inherent RBMK reactor design flaws and the intentional disabling of several nuclear reactor safety systems, resulted in an uncontrolled nuclear chain reaction.A large amount of energy was suddenly released, vapourising superheated cooling water and rupturing the reactor core in a highly destructive steam explosion. This was immediately followed by an open-air reactor core fire that released considerable airborne radioactive contamination for about nine days that precipitated onto parts of the USSR and western Europe, before being finally contained on 4 May 1986.The fire gradually released about the same amount of contamination as the initial explosion.
As a result of rising ambient radiation levels off-site, a 10-kilometre (6.2 mi) radius exclusion zone was created 36 hours after the accident. About 49,000 people were evacuated from the area, primarily from Pripyat. The exclusion zone was later increased to 30 kilometres (19 mi) radius when a further 68,000 people were evacuated from the wider area.To reduce the spread of radioactive contamination from the wreckage and to protect the site from further weathering, the remains of reactor No. 4 required a protective enclosure. The Chernobyl Nuclear Power Plant sarcophagus was built and finished by December 1986, and would also provide radiological protection for the crews of the undamaged reactors at the site, with No. 3 continuing to produce electricity until 2000. Due to the continued deterioration of the sarcophagus, both it and the No. 4 reactor were further enclosed in 2017 by the Chernobyl New Safe Confinement, a larger enclosure that allows the removal of both the sarcophagus and the reactor debris, while containing the radioactive hazard. Nuclear clean-up is scheduled for completion in 2065.The reactor explosion killed two of the reactor operating staff. In the emergency response that followed, 134 firemen and station staff were hospitalized with acute radiation syndrome due to absorbing high doses of ionizing radiation. Of these 134 men, 28 died in the days to months afterward and approximately 14 suspected radiation-induced cancer deaths followed within the next 10 years. Among the wider population, an excess of 15 childhood thyroid cancer deaths were documented as of 2011. Due to the often long incubation periods for radiation exposure to induce cancer, the United Nations Scientific Committee on the Effects of Atomic Radiation (UNSCEAR) has, at multiple times, reviewed all the published research on the incident and found that at present, fewer than 100 documented deaths are likely to be attributable to increased exposure to radiation.Determining the total eventual number of exposure related deaths is based on the linear no-threshold model, a contested statistical model, which has also been used in estimates of low level radon and air pollution exposure. Model predictions with the greatest confidence values of the eventual total death toll in the decades ahead from Chernobyl releases vary, from 4,000 fatalities when solely assessing the three most contaminated former Soviet states, to about 9,000 to 16,000 fatalities when assessing the total continent of Europe.The Chernobyl disaster is considered the worst nuclear power plant accident in history, both in terms of cost and casualties. The struggle to safeguard against hazards immediately after the accident, together with later decontamination efforts of the surroundings, ultimately involved more than 500,000 liquidators and cost an estimated 18 billion Soviet rubles—roughly US$68 billion in 2019, adjusted for inflation. The accident prompted safety upgrades on all remaining Soviet-designed RBMK reactors, of which 10 continue to be operational as of 2019.
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