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Friday, July 22, 2022

Religion and LGBT people

From Wikipedia, the free encyclopedia

The relationship between religion and lesbian, gay, bisexual, and transgender (LGBT) people can vary greatly across time and place, within and between different religions and sects, and regarding different forms of homosexuality, bisexuality, non-binary, and transgender identities.

Some of the authoritative bodies and doctrines of the world's largest religions may view these negatively. This can range from quiet discouragement, explicitly forbidding same-sex sexual practices or sex/gender reassignment among adherents, actively opposing social acceptance of LGBT identities, to execution of people engaging in homosexual acts while tolerating sex/gender reassignment in specific cases.

Liberal and progressive voices within these religions tend to view LGBT people more positively, and some liberal religious denominations may bless same-sex marriages, as well as accepting and marrying people who are transgender. Historically, some cultures and religions accommodated, institutionalized, or revered same-sex love and sexuality; such mythologies and traditions can be found in numerous religions around the world; elements of religious and cultural incorporation of non-heterosexual practice can still be identified in traditions that have survived into the modern era, such as the Berdache, Hijra, and Xanith.

Religious views of LGBT people

According to a 2006 Australian survey, LGBT Australians, compared to the general Australian population, were much more likely to have no religious affiliation, much less likely to be affiliated with a Christian denomination, and more likely to be affiliated with a non-Christian religion. The distribution of religions that LGBT Australians were raised in, however, was similar to that of the general population. Men, particularly bisexual men, were more likely to be Christian and more likely to have stayed in the same religion. Lesbians were more likely to have left the religion they were raised in and be currently unaffiliated.

A 2004 survey of LGBT New Zealanders found that 73% had no religion, 14.8% were Christian and 2.2% were Buddhist. In contrast, in 2001 census the general New Zealand population reported 59.8% Christian and 29.2% no religion. When looking at change since 1966, LGBT people are disaffiliating with Christianity at a rate 2.37 times the rate of the general population in New Zealand. In the survey 59.8% reported a belief in a spiritual force, god or gods; this differed significantly by gender, with 64.9% of women and 55.5% of men reporting such a belief.

The Radical Faeries are a worldwide queer spiritual movement, founded in 1979 in the United States. Radical Faerie communities are generally inspired by aboriginal, native or traditional spiritualities, especially those that incorporate queer sensibilities.

Religious groups and public policy

Opposition to same-sex marriage and LGBT rights is often associated with conservative religious views. The American Family Association and other religious groups have promoted boycotts of corporations whose policies support the LGBT community.

On the other hand, the Unitarian Universalist Association supports the freedom to marry and compares resistance to it to the resistance to abolition of slavery, women's suffrage, and the end of anti-miscegenation laws.

Lesbians and gay men face particular problems in conservative Islamic nations where laws generally prohibit same-sex sexual behavior; where interpretation of Sharia Law on male homosexuality carries the death penalty, with this form of discrimination being viewed as a breach of human rights by international human rights experts and human rights organisations such as Amnesty International.

With the signature of the US in 2009, the proposed UN declaration on LGBT rights has now been signed by 67 members of the United Nations. There was an opposing statement put forward by Muslim nations, and this has been signed by 57 member states, the majority being in Africa and Asia. 68 out of the total 192 countries have not yet signed either statement.

Homosexuality and religion

Transgender people and religion

Views of specific religions

Abrahamic religions

Abrahamic religions (namely Judaism, Samaritanism, Christianity, the Baháʼí Faith, and Islam) have traditionally affirmed and endorsed a patriarchal and heteronormative approach towards human sexuality, favouring exclusively penetrative vaginal intercourse between men and women within the boundaries of marriage over all other forms of human sexual activity, including autoeroticism, masturbation, oral sex, non-penetrative and non-heterosexual sexual intercourse (all of which have been labeled as "sodomy" at various times), believing and teaching that such behaviors are forbidden because they're considered sinful, and further compared to or derived from the behavior of the alleged residents of Sodom and Gomorrah. However, the status of LGBT people in early Christianity and early Islam is debated.

Christianity

United Church of Christ's motto which expresses its support for LGBT rights
 
Metropolitan Community Church, a LGBT-affirming Christian church in New York City
 
The LGBT flag at the First Unitarian Universalist Church in Houston indicates that the church welcomes LGBT-identifying people.

Christian denominations have a variety of beliefs about LGBT people, and the moral status of same-sex sexual practices and gender variance. LGBT people may be barred from membership, accepted as laity, or ordained as clergy, depending on the denomination.

The Roman Catholic Church welcomes people attracted to the same sex, while maintaining its teaching that homosexual relationships and acts are sinful. The Roman Curia considers transgender individuals to be their biological sex and admits no distinction between "sex" and "gender". The Orthodox Church holds similar stances on same-sex attraction and conjugal relations. Protestant denominations have a wide range of views. Some denominations espouse similar views to Catholicism and Orthodoxy, and teach that all sexual relations outside of traditional marriage between a man and a woman are sinful, such as the Reformed Church in America, Southern Baptist Convention, The Church of Jesus Christ of Latter-day Saints and Jehovah's Witnesses.

Other Christian churches, such as the Church of England, United Church of Canada, the United Church of Christ, the Presbyterian Church (U.S.A.), the Evangelical Lutheran Church in Canada, the Evangelical Lutheran Church in America, the Lutheran Church of Sweden, the Lutheran Church of Denmark, the Lutheran Church in Norway, the Lutheran Church of Iceland, the Protestant Church of the Netherlands, the United Protestant Church in Belgium, the United Protestant Church of France, the German Lutheran, Reformed and United Churches in Evangelical Church in Germany, the Old Catholic Church, the Anglican Church in Canada, the Episcopal Church in United States, and the Scottish Episcopal Church don't consider same-sex relations immoral, and will ordain LGBT clergy and celebrate blessings of same-sex marriages. Liberal Quakers, those in membership of Britain Yearly Meeting and Friends General Conference in the United States, approve of same-sex marriage and union and conduct same-sex marriage ceremonies in the United Kingdom.

Unitarian Universalism

Unitarian Universalism and the Unitarian Universalist Association (UUA) have a long-standing tradition of welcoming LGBT people. The first ordained minister of any religion in the US or Canada to come out was the Rev. James Stoll in 1969. There have been UUA resolutions supporting people regardless of sexual orientation since 1970, and a popular program of becoming a "Welcoming Congregation" since 1989. The UUA has officially supported UUA clergy performing Services of Union between same-sex couples since 1984, and has supported same-sex marriage since 1996.

The Canadian Unitarian Council (CUC) similarly operates a Gender and Sexual Diversity Monitoring Group and, like the UUA (of which it became autonomous in 2002), has Welcoming Congregations. The Canadian Unitarian Universalist congregations perform same-sex marriages and the CUC supports this work through its Lay Chaplaincy program.

Judaism

A halakhic egalitarian Pride minyan in Tel Aviv on the second Shabbat of Hanukkah

The American branch of Conservative Judaism formally approves of same-sex marriage ceremonies. As of 1992 with the Report of the Reconstructionist Commission on Homosexuality, the Reconstructionist Movement of Judaism has expressed its support for same-sex marriages as well as the inclusion of gay and lesbian people in all aspects of Jewish life. The Jewish Reconstructionist Federation leaves the choice of whether or not to perform same-sex marriages to individual rabbis but the procedure is included in the Reconstructionist Rabbi's Manual and many choose to use the traditional language and symbols of kiddushin. Reform Judaism, the largest Jewish denomination in the United States, is generally supportive of LGBT rights and marriage.

Islam

Attitudes toward LGBTQ+ people and their experiences in the Muslim world have been influenced by its religious, legal, social, political, and cultural history. The religious stigma and sexual taboo associated with homosexuality in Islamic societies can have profound effects for those Muslims who self-identify as LGBTQ+. Today, most LGBTQ-affirming Islamic organizations and individual congregations are primarily based in the Western world and South Asian countries; they usually identify themselves with the liberal and progressive movements within Islam.

Homosexual acts are forbidden in traditional Islamic jurisprudence and are liable to different punishments, including flogging, stoning, and the death penalty, depending on the situation and legal school. However, homosexual relationships were generally tolerated in pre-modern Islamic societies, and historical records suggest that these laws were invoked infrequently, mainly in cases of rape or other "exceptionally blatant infringement on public morals". Public attitudes toward homosexuality in the Muslim world underwent a marked negative change starting from the 19th century through the global spread of Islamic fundamentalist movements such as Salafism and Wahhabism, and the influence of the sexual notions and restrictive norms prevalent in Europe at the time: a number of Muslim-majority countries have retained criminal penalties for homosexual acts enacted under European colonial rule. In recent times, extreme prejudice, discrimination, and violence against LGBT people persists, both socially and legally, in much of the Muslim world, exacerbated by increasingly socially conservative attitudes and the rise of Islamist movements in Muslim-majority countries.

Islamic views on homosexuality are also influenced by the rulings prescribed by the Quran and the teachings of the Islamic prophet Muhammad. The mainstream interpretation of some Quranic verses and hadith condemn sexual acts between members of the same sex, along with most forms of extramarital relations. In the late 1980s, Mufti Muhammad Sayyid Tantawy of Egypt issued a fatwa supporting the right for those who fit the description of mukhannathun to have sex reassignment surgery; Ayatollah Khomeini of Iran issued similar fatwas around the same time. Khomeini's initial fatwa concerned intersex individuals as well, but he later specified that sex reassignment surgery was also permissible in the case of transgender individuals.

Because homosexuality is illegal in Iran but transgenderism is legal, some gay individuals have been forced to undergo sex reassignment surgery and transition into the opposite sex, regardless of their actual gender identity. Therefore, transgender people are generally more accepted, provided they conform to traditional gender norms post-transition; for example, the Iranian government not only allows and recognizes sex reassignment surgery, but also subsidizes the procedure for transgender citizens. In some regions of South Asia such as India, Bangladesh, and Pakistan, the hijras are officially recognized as a third gender that is neither male nor female, a concept that some have compared to mukhannathun.

In France there was an Islamic same-sex marriage on 18 February 2012. In Paris in November 2012 a room in a Buddhist prayer hall was used by gay Muslims and called a "gay-friendly mosque", and a French Islamic website is supporting religious same-sex marriage. The Ibn Ruschd-Goethe mosque in Berlin is a liberal mosque open to all types of Muslims, where men and women pray together and LGBT worshippers are welcomed and supported. Other significant LGBT-inclusive mosques or prayer groups include the El-Tawhid Juma Circle Unity Mosque in Toronto, Masjid an-Nur al-Isslaah (Light of Reform Mosque) in Washington D.C., Masjid Al-Rabia in Chicago, Unity Mosque in Atlanta, People's Mosque in Cape Town South Africa, Masjid Ul-Umam mosque in Cape Town, Qal'bu Maryamin in California, and the Nur Ashki Jerrahi Sufi Community in New York City.

Muslims for Progressive Values, based in the United States and Malaysia, is "a faith-based, grassroots, human rights organization that embodies and advocates for the traditional Qur'anic values of social justice and equality for all, for the 21st Century." MPV has recorded "a lecture series that seeks to dismantle the religious justification for homophobia in Muslim communities." The lectures can be viewed at MPV Lecture Series. The Mecca Institute is an LGBT-inclusive and progressive online Islamic seminary, and serves as an online center of Islamic learning and research.

Baháʼí Faith

The Baháʼí Faith teaches that the only acceptable form of sexual expression is within marriage, and Baháʼí marriage is defined in the religion's texts as exclusively between one man and one woman. Baháʼís stress the importance of absolute chastity for any unmarried person, and focus on personal restraint. The Universal House of Justice, the elected governing body of the Baháʼí Faith, has stated that "the Faith does not recognize homosexuality as a 'natural' or permanent phenomenon." The Universal House of Justice has approved of and encouraged Shoghi Effendi's idea of possible medical treatment. However, membership in the Baháʼí community is open to lesbian and gay adherents, who are to be "advised and sympathized with".

Dharmic religions

Ardhanarishvara, the androgynous form (half-male and half-female) of the Hindu deity Shiva combined with his consort Parvati. Tiruvenkadu, Chola, 11th century CE.

Hinduism

Hinduism has taken various positions, ranging from positive to neutral or antagonistic. Referring to the nature of samsara, the Rigveda, one of the four canonical sacred texts of Hinduism says 'Vikruti Evam Prakriti' (perversity/diversity is what nature is all about, or, what seems un-natural is also natural), which some scholars believe recognizes homosexuality as natural, if not an approval of homosexuality. Sexuality is rarely discussed openly in Hindu society, and LGBT issues are largely a taboo subject — especially among the strongly religious. A "third gender" has been acknowledged within Hinduism since Vedic times. Several Hindu texts, such as Manu Smriti and Sushruta Samhita, assert that some people are born with either mixed male and female natures, or sexually neuter, as a matter of natural biology. They worked as hairdressers, flower-sellers, servants, masseurs and prostitutes. Today, many people that identify as hijras are officially recognized as a third gender that is neither male nor female in India; they mostly live on the margins of society, and many still work in prostitution, or make a livelihood as beggars.

Several Hindu religious laws contain injunctions against homosexual activity, while some Hindu mythologies speaks favorably of lesbian relations and some third-gendered individuals were highly regarded by Hindu legends. Hindu groups are historically not unifyed regarding the issue of homosexuality, each one having a distinct doctrinal view.

The Indian Kama Sutra, written in the 4th century CE, contains passages describing eunuchs or "third-sex" males performing oral sex on men. However, the author was "not a fan of homosexual activities" and treated such individuals with disdain, according to historian Devdutt Pattanaik. Similarly, some medieval Hindu temples and artifacts openly depict both male homosexuality and lesbianism within their carvings, such as the temple walls at Khajuraho. Some infer from these images that Hindu society and religion were previously more open to variations in human sexuality than they are at present.

Khajoraho scene of three women and one man.

In some Hindu sects (specially among the hijras), many divinities are androgynous. There are Hindu deities who are intersex (both male and female); who manifest in all three genders; who switch from male to female or from female to male; male deities with female moods and female deities with male moods; deities born from two males or from two females; deities born from a single male or single female; deities who avoid the opposite sex; deities with principal companions of the same sex, and so on. However, this is not accepted by the majority of Hindus, and is often considered heretical in nature. Those who do accept it justify with the belief that both God and nature are unlimitedly diverse and God is difficult to comprehend.

Several Hindu priests have performed same-sex marriages, arguing that love is the result of attachments from previous births and that marriage, as a union of spirit, is transcendental to gender. It is often regarded that Hinduism does not condemn homosexuality.

Buddhism

Shunkō-in (Japanese: 春光院: "Temple of the Ray of Spring Light") in Kyoto, Japan, is a Buddhist temple that performs same-sex marriage ceremonies.

According to the Pāli Canon and Āgama (the early Buddhist scriptures), there is nothing saying that same or opposite gender relations have anything to do with sexual misconduct, and some Theravādin monks express that same-gender relations do not violate the rule to avoid sexual misconduct, which means not having sex with someone under age (thus protected by their parents or guardians), someone betrothed or married and who have taken vows of religious celibacy.

Views on homosexuality and LGBT rights differ in the Buddhist tradition. However, many Buddhist leaders and groups have been historically supportive and continue to be supportive of LGBT people. The renowned Thiền Buddhist master, Thích Nhất Hạnh, remarked that the spirit of Buddhism is inclusiveness and stated that "when you look at the ocean, you see different kinds of waves, many sizes and shapes, but all the waves have water as their foundation and substance. If you are born gay or lesbian, your ground of being in the same as mine. We are different, but we share the same ground of being."

Japan's culture and major religions don't have a history of hostility towards homosexuality. Same-sex marriages are performed at Shunkō-in, a Rinzai Zen Buddhist temple in Kyoto, Japan. Some modern Buddhist leaders were active in the movement for same-sex marriage rights in Taiwan, which legalized same-sex marriages in 2019. Some adherents of the Navayāna (Ambedkarite) Buddhist tradition are supporting LGBT rights within their larger activist activities. In Thailand, some leaders in the Theravāda tradition including Phra Payom Kalayano have expressed support for LGBT rights.

In 1997, the 14th Dalai Lama Tenzin Gyatso declared: "From a Buddhist point of view, men-to-men and women-to-women is generally considered sexual misconduct." However, this view expressed by the Dalai Lama is not based on the teachings of Gautama Buddha but derived from some later Abhidharma texts. Moreover, the Dalai Lama has repeatedly "voiced his support for the full recognition of human rights for all people, regardless of sexual orientation." In the most recent interview with the Dalai Lama on this topic (10 March 2014), the Dalai Lama said gay marriage is "OK", provided it's not in contradiction with the values of one's chosen religion. Also in the Tibetan tradition, the Nalandabodhi sangha has stated that they are welcoming of all sexual orientations and well-known Bhutanese lama Khyentse Norbu has expressed support for LGBT rights in Bhutan.

In Western Buddhist denominations, there is widescale support for LGBT rights from Buddhist groups and organizations, including the European Buddhist Union, the Buddhist Churches of America, many Shin Buddhist groups, and Zen leaders such as Thích Nhất Hạnh. The Federation of Australian Buddhist Councils (FABC), representing Buddhist laypeople, and the Australian Sangha Association vocally supported same-sex marriage in Australia. Soka Gakkai International-USA (SGI-USA) is the most diverse Buddhist community in the United States with more than 500 chapters and some 100 centers throughout the country supports LGBT rights. American Soka Gakkai Buddhists have performed same-sex union ceremonies since the 1990s. In a PEW research poll, 88% of American Buddhists stated that homosexuality should be accepted. This was a higher level of support than any other religious group studied.

Sikhism

The Sikh holy book, the Guru Granth Sahib, does not explicitly mention homosexuality. The Guru Granth Sahib is seen as the spiritual authority on all Sikh matters.

Some modern Sikh leaders have condemned homosexuality. Giani Joginder Singh Vedanti of the temporal Sikh authority (Akal Takht), has condemned homosexuality while reminding visiting Sikh-Canadian Members of Parliament (MPs) of their religious duty to oppose same-sex marriage. The Sikh religious body, the Akal Takht, has issued an edict condemning gay marriage.

Other Sikhs point out that Sikhism does not condemn homosexuality or gay marriage reminding them that the Guru Granth Sahib leaves this as a matter of personal conscience.

Eastern and Southeast Asian religions

Chinese folk religion

Tu'er Shen, also known as the Rabbit God, is a gay Chinese deity. In 2006, Lu Wei-ming founded a temple for Tu'er Shen in Yonghe District in the New Taipei City in Taiwan, which has been called the world's only religious shrine for gay people. About 9,000 pilgrims visit the temple each year praying to find a suitable partner. The Wei-ming temple also performs love ceremonies for gay couples. It is the world's only religious shrine for homosexuals, and the temple performs love ceremonies for gay couples.

Confucianism

Shintoism

Historically, the Shinto religion "had no special code of morals and seems to have regarded sex as a natural phenomenon to be enjoyed with few inhibitions." While Shinto beliefs are diverse, Japanese Shintoism doesn't condemn homosexuality, and the formally organized Konkokyo sect is fully affirming. Multiple Shinto leaders advocated in support of gay marriage in Hawaii.

Zoroastrianism

Indigenous religions

African Diasporic religions

Homosexuality is religiously acceptable in Haitian Vodou. The lwa or loa (spirits) Erzulie Dantor and Erzulie Freda are often associated with and viewed as protectors of queer people.

Within Candomblé, a syncretic religion founds primarily found in Brazil, there is widespread (though not universal) support for gay rights, many members are LGBT, and have performed gay marriages. Practitioners of Santería, primarily found in Cuba, generally (though not universally) welcome LGBT members and include them in religious or ritual activities. Also a Brazilian syncretic religion, Umbanda houses generally support LGBT rights and have performed gay marriages.Homosexuality is religiously acceptable in Haitian Vodou. The lwa or loa (spirits) Erzulie Dantor and Erzulie Freda are often associated with and viewed as protectors of queer people. The lao Ghede Nibo is sometimes depicted as an effeminate drag queen and inspires those he inhabits to lascivious sexuality of all kinds.

Ancient Mesopotamian religion

Individuals who went against the traditional gender binary were heavily involved in the cult of Inanna, an ancient Mesopotamian goddess. During Sumerian times, a set of priests known as gala worked in Inanna's temples, where they performed elegies and lamentations. Men who became gala sometimes adopted female names and their songs were composed in the Sumerian eme-sal dialect, which, in literary texts, is normally reserved for the speech of female characters. Some Sumerian proverbs seem to suggest that gala had a reputation for engaging in anal sex with men. During the Akkadian Period, kurgarrū and assinnu were servants of Ishtar who dressed in female clothing and performed war dances in Ishtar's temples. Several Akkadian proverbs seem to suggest that they may have also had homosexual proclivities. Gwendolyn Leick, an anthropologist known for her writings on Mesopotamia, has compared these individuals to the contemporary Indian hijra. In one Akkadian hymn, Ishtar is described as transforming men into women. Some modern pagans include Inanna in their worship.

Pre-colonial religions of the Americas

Drawing by George Catlin (1796–1872) while on the Great Plains among the Sac and Fox Nation. Depicting a group of male warriors dancing around a male-bodied person in a woman's dress, non-Native artist George Catlin titled the painting Dance to the Berdache.

Among the Indigenous peoples of the Americas prior to the European colonization, many Nations had respected ceremonial, religious, and social roles for homosexual, bisexual, and gender-nonconforming individuals in their communities and in many contemporary Native American and First Nations communities, these roles still exist. Homosexual and gender-variant individuals were also common among other pre-conquest civilizations in Latin America, such as the Aztecs, Mayans, Quechuas, Moches, Zapotecs, and the Tupinambá of Brazil and were accepted in their various religions.

New religious movements

Since the beginning of the sexual liberation movement in the Western world, which coincided with second-wave feminism and the women's liberation movement initiated in the early 1960s, new religious movements and alternative spiritualities such as Modern Paganism and the New Age began to grow and spread across the globe alongside their intersection with the sexual liberation movement and the counterculture of the 1960s, and exhibited characteristic features, such as the embrace of alternative lifestyles, unconventional dress, rejection of Abrahamic religions and their conservative social mores, use of cannabis and other recreational drugs, relaxed attitude, sarcastic humble or self-imposed poverty, and laissez-faire sexual behavior. The sexual liberation movement was aided by feminist ideologues in their mutual struggle to challenge traditional ideas regarding female sexuality, male sexuality, and queer sexuality. Elimination of undue favorable bias towards men and objectification of women, as well as support for women's right to choose their sexual partners free of outside interference or societal judgment, were three of the main goals associated with sexual liberation from the feminist perspective.

Modern Paganism

Most Neopagan religions have the theme of fertility (both physical and creative/spiritual) as central to their practices, and as such encourage what they view as a healthy sex life, consensual sex between adults, regardless of gender.

Heathenry, a modern Germanic Pagan movement, includes several pro-LGBT groups. Some groups legitimize openness toward LGBT practitioners by reference to the gender-bending actions of Thor and Odin in Norse mythology. There are, for instance, homosexual and transgender members of The Troth, a prominent U.S. Heathen organisation. Many Heathen groups in Northern Europe perform same-sex marriages, and a group of self-described "Homo-Heathens" marched in the 2008 Stockholm Pride carrying a statue of the Norse god Freyr. Research found a greater proportion of LGBT practitioners within Heathenry (21%) than wider society, although noted that the percentage was lower than in other forms of modern Paganism.

Wicca, like other religions, has adherents with a broad spectrum of views, ranging from conservative to liberal. It is a largely nondogmatic religion and has no prohibitions against sexual intercourse outside of marriage or relationships between members of the same sex. The religion's ethics are largely summed up by the Wiccan Rede: "An it harm none, do as thou wilt", which is interpreted by many as allowing and endorsing responsible sexual relationships of all varieties. Specifically in the Wiccan tradition of modern witchcraft, one of the widely accepted pieces of Craft liturgy, the Charge of the Goddess instructs that "...all acts of love and pleasure are [the Goddess'] rituals", giving validity to all forms of sexual activity for Wiccan practitioners.

In the Gardnerian and Alexandrian forms of Wicca, the "Great Rite" is a sex ritual much like the hieros gamos, performed by a priest and priestess who are believed to embody the Wiccan God and Goddess. The Great Rite is almost always performed figuratively using the athame and chalice as symbols of the penis and vagina. The literal form of the ritual is always performed by consenting adults, by a couple who are already lovers and in private. The Great Rite is not seen as an opportunity for casual sex.

Raëlism

Raëlian participants attending the Korea Queer Culture Festival (2014)

Raëlism, an international new religious movement and UFO religion which was founded in France in 1974, promotes a positive outlook towards human sexuality, including homosexuality. Its founder Raël recognised same-sex marriage, and a Raëlian press release stated that sexual orientation is genetic and it also likened discrimination against gay people to racism. Some Raëlian leaders have performed licensed same-sex marriages.

Santa Muerte

The cult of Santa Muerte is a new religious movement centered on the worship of Santa Muerte, a cult image, female deity, and folk saint which is popularly revered in Mexican Neopaganism and folk Catholicism. A personification of death, she is associated with healing, protection, and safe delivery to the afterlife by her devotees. Santa Muerte is also revered and seen as a saint and protector of the lesbian, gay, bisexual, transgender, and queer (LGBTQ+) communities in Mexico, since LGBTQ+ people are considered and treated as outcasts by the Catholic Church, evangelical churches, and Mexican society at large. Many LGBTQ+ people ask her for protection from violence, hatred, disease, and to help them in their search for love. Her intercession is commonly invoked in same-sex marriage ceremonies performed in Mexico. The Iglesia Católica Tradicional México-Estados Unidos, also known as the Church of Santa Muerte, recognizes gay marriage and performs religious wedding ceremonies for homosexual couples. According to R. Andrew Chesnut, PhD in Latin American history and professor of Religious studies, the cult of Santa Muerte is the single fastest-growing new religious movement in the Americas.

Satanism

The Church of Satan has always accepted gays, lesbians and bisexuals since its foundation in 1966. The church supports legalization of same-sex marriages.

Scientology

Wicca

Electrical engineering

From Wikipedia, the free encyclopedia

Electrical engineering
Umspannwerk-Pulverdingen 380kV-Trennschalter.jpg
Occupation
NamesElectrical engineer
Activity sectors
Electronics, electrical circuits, electromagnetics, power engineering, electrical machines, telecommunication, control systems, signal processing, optics, photonics
Description
CompetenciesTechnical knowledge, management skills, design (see also Glossary of electrical and electronics engineering)
Fields of
employment
Technology, science, exploration, military, industry

Electrical engineering is an engineering discipline concerned with the study, design, and application of equipment, devices, and systems which use electricity, electronics, and electromagnetism. It emerged as an identifiable occupation in the latter half of the 19th century after commercialization of the electric telegraph, the telephone, and electrical power generation, distribution, and use.

Electrical engineering is now divided into a wide range of different fields, including computer engineering, systems engineering, power engineering, telecommunications, radio-frequency engineering, signal processing, instrumentation, photovoltaic cells, electronics, and optics and photonics. Many of these disciplines overlap with other engineering branches, spanning a huge number of specializations including hardware engineering, power electronics, electromagnetics and waves, microwave engineering, nanotechnology, electrochemistry, renewable energies, mechatronics/control, and electrical materials science.

Electrical engineers typically hold a degree in electrical engineering or electronic engineering. Practising engineers may have professional certification and be members of a professional body or an international standards organization. These include the International Electrotechnical Commission (IEC), the Institute of Electrical and Electronics Engineers (IEEE) and the Institution of Engineering and Technology (IET) (formerly the IEE).

Electrical engineers work in a very wide range of industries and the skills required are likewise variable. These range from circuit theory to the management skills of a project manager. The tools and equipment that an individual engineer may need are similarly variable, ranging from a simple voltmeter to sophisticated design and manufacturing software.

History

Electricity has been a subject of scientific interest since at least the early-17th-century. William Gilbert was a prominent early electrical scientist, and was the first to draw a clear distinction between magnetism and static electricity. He is credited with establishing the term "electricity". He also designed the versorium: a device that detects the presence of statically charged objects. In 1762 Swedish professor Johan Wilcke invented a device later named electrophorus that produced a static electric charge. By 1800 Alessandro Volta had developed the voltaic pile, a forerunner of the electric battery.

19th century

The discoveries of Michael Faraday formed the foundation of electric motor technology.

In the 19th century, research into the subject started to intensify. Notable developments in this century include the work of Hans Christian Ørsted who discovered in 1820 that an electric current produces a magnetic field that will deflect a compass needle, of William Sturgeon who, in 1825 invented the electromagnet, of Joseph Henry and Edward Davy who invented the electrical relay in 1835, of Georg Ohm, who in 1827 quantified the relationship between the electric current and potential difference in a conductor, of Michael Faraday (the discoverer of electromagnetic induction in 1831), and of James Clerk Maxwell, who in 1873 published a unified theory of electricity and magnetism in his treatise Electricity and Magnetism.

In 1782, Georges-Louis Le Sage developed and presented in Berlin probably the world's first form of electric telegraphy, using 24 different wires, one for each letter of the alphabet. This telegraph connected two rooms. It was an electrostatic telegraph that moved gold leaf through electrical conduction.

In 1795, Francisco Salva Campillo proposed an electrostatic telegraph system. Between 1803 and 1804, he worked on electrical telegraphy and in 1804, he presented his report at the Royal Academy of Natural Sciences and Arts of Barcelona. Salva's electrolyte telegraph system was very innovative though it was greatly influenced by and based upon two new discoveries made in Europe in 1800 – Alessandro Volta's electric battery for generating an electric current and William Nicholson and Anthony Carlyle's electrolysis of water. Electrical telegraphy may be considered the first example of electrical engineering. Electrical engineering became a profession in the later 19th century. Practitioners had created a global electric telegraph network, and the first professional electrical engineering institutions were founded in the UK and USA to support the new discipline. Francis Ronalds created an electric telegraph system in 1816 and documented his vision of how the world could be transformed by electricity. Over 50 years later, he joined the new Society of Telegraph Engineers (soon to be renamed the Institution of Electrical Engineers) where he was regarded by other members as the first of their cohort. By the end of the 19th century, the world had been forever changed by the rapid communication made possible by the engineering development of land-lines, submarine cables, and, from about 1890, wireless telegraphy.

Practical applications and advances in such fields created an increasing need for standardised units of measure. They led to the international standardization of the units volt, ampere, coulomb, ohm, farad, and henry. This was achieved at an international conference in Chicago in 1893. The publication of these standards formed the basis of future advances in standardisation in various industries, and in many countries, the definitions were immediately recognized in relevant legislation.

During these years, the study of electricity was largely considered to be a subfield of physics since the early electrical technology was considered electromechanical in nature. The Technische Universität Darmstadt founded the world's first department of electrical engineering in 1882 and introduced the first degree course in electrical engineering in 1883. The first electrical engineering degree program in the United States was started at Massachusetts Institute of Technology (MIT) in the physics department under Professor Charles Cross,  though it was Cornell University to produce the world's first electrical engineering graduates in 1885. The first course in electrical engineering was taught in 1883 in Cornell's Sibley College of Mechanical Engineering and Mechanic Arts. It was not until about 1885 that Cornell President Andrew Dickson White established the first Department of Electrical Engineering in the United States. In the same year, University College London founded the first chair of electrical engineering in Great Britain. Professor Mendell P. Weinbach at University of Missouri soon followed suit by establishing the electrical engineering department in 1886. Afterwards, universities and institutes of technology gradually started to offer electrical engineering programs to their students all over the world.

During these decades use of electrical engineering increased dramatically. In 1882, Thomas Edison switched on the world's first large-scale electric power network that provided 110 volts — direct current (DC) — to 59 customers on Manhattan Island in New York City. In 1884, Sir Charles Parsons invented the steam turbine allowing for more efficient electric power generation. Alternating current, with its ability to transmit power more efficiently over long distances via the use of transformers, developed rapidly in the 1880s and 1890s with transformer designs by Károly Zipernowsky, Ottó Bláthy and Miksa Déri (later called ZBD transformers), Lucien Gaulard, John Dixon Gibbs and William Stanley, Jr. Practical AC motor designs including induction motors were independently invented by Galileo Ferraris and Nikola Tesla and further developed into a practical three-phase form by Mikhail Dolivo-Dobrovolsky and Charles Eugene Lancelot Brown. Charles Steinmetz and Oliver Heaviside contributed to the theoretical basis of alternating current engineering. The spread in the use of AC set off in the United States what has been called the war of the currents between a George Westinghouse backed AC system and a Thomas Edison backed DC power system, with AC being adopted as the overall standard.

Early 20th century

Guglielmo Marconi, known for his pioneering work on long-distance radio transmission

During the development of radio, many scientists and inventors contributed to radio technology and electronics. The mathematical work of James Clerk Maxwell during the 1850s had shown the relationship of different forms of electromagnetic radiation including the possibility of invisible airborne waves (later called "radio waves"). In his classic physics experiments of 1888, Heinrich Hertz proved Maxwell's theory by transmitting radio waves with a spark-gap transmitter, and detected them by using simple electrical devices. Other physicists experimented with these new waves and in the process developed devices for transmitting and detecting them. In 1895, Guglielmo Marconi began work on a way to adapt the known methods of transmitting and detecting these "Hertzian waves" into a purpose built commercial wireless telegraphic system. Early on, he sent wireless signals over a distance of one and a half miles. In December 1901, he sent wireless waves that were not affected by the curvature of the Earth. Marconi later transmitted the wireless signals across the Atlantic between Poldhu, Cornwall, and St. John's, Newfoundland, a distance of 2,100 miles (3,400 km).

Millimetre wave communication was first investigated by Jagadish Chandra Bose during 1894–1896, when he reached an extremely high frequency of up to 60 GHz in his experiments. He also introduced the use of semiconductor junctions to detect radio waves, when he patented the radio crystal detector in 1901.

In 1897, Karl Ferdinand Braun introduced the cathode ray tube as part of an oscilloscope, a crucial enabling technology for electronic television. John Fleming invented the first radio tube, the diode, in 1904. Two years later, Robert von Lieben and Lee De Forest independently developed the amplifier tube, called the triode.

In 1920, Albert Hull developed the magnetron which would eventually lead to the development of the microwave oven in 1946 by Percy Spencer. In 1934, the British military began to make strides toward radar (which also uses the magnetron) under the direction of Dr Wimperis, culminating in the operation of the first radar station at Bawdsey in August 1936.

In 1941, Konrad Zuse presented the Z3, the world's first fully functional and programmable computer using electromechanical parts. In 1943, Tommy Flowers designed and built the Colossus, the world's first fully functional, electronic, digital and programmable computer. In 1946, the ENIAC (Electronic Numerical Integrator and Computer) of John Presper Eckert and John Mauchly followed, beginning the computing era. The arithmetic performance of these machines allowed engineers to develop completely new technologies and achieve new objectives.

In 1948 Claude Shannon publishes "A Mathematical Theory of Communication" which mathematically describes the passage of information with uncertainty (electrical noise).

Solid-state electronics

A replica of the first working transistor, a point-contact transistor
 
Metal–oxide–semiconductor field-effect transistor (MOSFET), the basic building block of modern electronics

The first working transistor was a point-contact transistor invented by John Bardeen and Walter Houser Brattain while working under William Shockley at the Bell Telephone Laboratories (BTL) in 1947. They then invented the bipolar junction transistor in 1948. While early junction transistors were relatively bulky devices that were difficult to manufacture on a mass-production basis, they opened the door for more compact devices.

The first integrated circuits were the hybrid integrated circuit invented by Jack Kilby at Texas Instruments in 1958 and the monolithic integrated circuit chip invented by Robert Noyce at Fairchild Semiconductor in 1959.

The MOSFET (metal-oxide-semiconductor field-effect transistor, or MOS transistor) was invented by Mohamed Atalla and Dawon Kahng at BTL in 1959. It was the first truly compact transistor that could be miniaturised and mass-produced for a wide range of uses. It revolutionized the electronics industry, becoming the most widely used electronic device in the world.

The MOSFET made it possible to build high-density integrated circuit chips. The earliest experimental MOS IC chip to be fabricated was built by Fred Heiman and Steven Hofstein at RCA Laboratories in 1962. MOS technology enabled Moore's law, the doubling of transistors on an IC chip every two years, predicted by Gordon Moore in 1965. Silicon-gate MOS technology was developed by Federico Faggin at Fairchild in 1968. Since then, the MOSFET has been the basic building block of modern electronics. The mass-production of silicon MOSFETs and MOS integrated circuit chips, along with continuous MOSFET scaling miniaturization at an exponential pace (as predicted by Moore's law), has since led to revolutionary changes in technology, economy, culture and thinking.

The Apollo program which culminated in landing astronauts on the Moon with Apollo 11 in 1969 was enabled by NASA's adoption of advances in semiconductor electronic technology, including MOSFETs in the Interplanetary Monitoring Platform (IMP) and silicon integrated circuit chips in the Apollo Guidance Computer (AGC).

The development of MOS integrated circuit technology in the 1960s led to the invention of the microprocessor in the early 1970s. The first single-chip microprocessor was the Intel 4004, released in 1971. The Intel 4004 was designed and realized by Federico Faggin at Intel with his silicon-gate MOS technology, along with Intel's Marcian Hoff and Stanley Mazor and Busicom's Masatoshi Shima. The microprocessor led to the development of microcomputers and personal computers, and the microcomputer revolution.

Subfields

One of the properties of electricity is that it is very useful for energy transmission as well as for information transmission. These were also the first areas in which electrical engineering was developed. Today electrical engineering has many subdisciplines, the most common of which are listed below. Although there are electrical engineers who focus exclusively on one of these subdisciplines, many deal with a combination of them. Sometimes certain fields, such as electronic engineering and computer engineering, are considered disciplines in their own right.

Power and energy

The top of a power pole

Power & Energy engineering deals with the generation, transmission, and distribution of electricity as well as the design of a range of related devices. These include transformers, electric generators, electric motors, high voltage engineering, and power electronics. In many regions of the world, governments maintain an electrical network called a power grid that connects a variety of generators together with users of their energy. Users purchase electrical energy from the grid, avoiding the costly exercise of having to generate their own. Power engineers may work on the design and maintenance of the power grid as well as the power systems that connect to it. Such systems are called on-grid power systems and may supply the grid with additional power, draw power from the grid, or do both. Power engineers may also work on systems that do not connect to the grid, called off-grid power systems, which in some cases are preferable to on-grid systems. The future includes Satellite controlled power systems, with feedback in real time to prevent power surges and prevent blackouts.

Telecommunications

Satellite dishes are a crucial component in the analysis of satellite information.

Telecommunications engineering focuses on the transmission of information across a communication channel such as a coax cable, optical fiber or free space. Transmissions across free space require information to be encoded in a carrier signal to shift the information to a carrier frequency suitable for transmission; this is known as modulation. Popular analog modulation techniques include amplitude modulation and frequency modulation. The choice of modulation affects the cost and performance of a system and these two factors must be balanced carefully by the engineer.

Once the transmission characteristics of a system are determined, telecommunication engineers design the transmitters and receivers needed for such systems. These two are sometimes combined to form a two-way communication device known as a transceiver. A key consideration in the design of transmitters is their power consumption as this is closely related to their signal strength. Typically, if the power of the transmitted signal is insufficient once the signal arrives at the receiver's antenna(s), the information contained in the signal will be corrupted by noise, specifically static.

Control engineering

Control systems play a critical role in spaceflight.

Control engineering focuses on the modeling of a diverse range of dynamic systems and the design of controllers that will cause these systems to behave in the desired manner. To implement such controllers, electronics control engineers may use electronic circuits, digital signal processors, microcontrollers, and programmable logic controllers (PLCs). Control engineering has a wide range of applications from the flight and propulsion systems of commercial airliners to the cruise control present in many modern automobiles. It also plays an important role in industrial automation.

Control engineers often use feedback when designing control systems. For example, in an automobile with cruise control the vehicle's speed is continuously monitored and fed back to the system which adjusts the motor's power output accordingly. Where there is regular feedback, control theory can be used to determine how the system responds to such feedback.

Control engineers also work in robotics to design autonomous systems using control algorithms which interpret sensory feedback to control actuators that move robots such as autonomous vehicles, autonomous drones and others used in a variety of industries.

Electronics

Electronic engineering involves the design and testing of electronic circuits that use the properties of components such as resistors, capacitors, inductors, diodes, and transistors to achieve a particular functionality. The tuned circuit, which allows the user of a radio to filter out all but a single station, is just one example of such a circuit. Another example to research is a pneumatic signal conditioner.

Prior to the Second World War, the subject was commonly known as radio engineering and basically was restricted to aspects of communications and radar, commercial radio, and early television. Later, in post-war years, as consumer devices began to be developed, the field grew to include modern television, audio systems, computers, and microprocessors. In the mid-to-late 1950s, the term radio engineering gradually gave way to the name electronic engineering.

Before the invention of the integrated circuit in 1959, electronic circuits were constructed from discrete components that could be manipulated by humans. These discrete circuits consumed much space and power and were limited in speed, although they are still common in some applications. By contrast, integrated circuits packed a large number—often millions—of tiny electrical components, mainly transistors, into a small chip around the size of a coin. This allowed for the powerful computers and other electronic devices we see today.

Microelectronics and nanoelectronics

Microelectronics engineering deals with the design and microfabrication of very small electronic circuit components for use in an integrated circuit or sometimes for use on their own as a general electronic component. The most common microelectronic components are semiconductor transistors, although all main electronic components (resistors, capacitors etc.) can be created at a microscopic level.

Nanoelectronics is the further scaling of devices down to nanometer levels. Modern devices are already in the nanometer regime, with below 100 nm processing having been standard since around 2002.

Microelectronic components are created by chemically fabricating wafers of semiconductors such as silicon (at higher frequencies, compound semiconductors like gallium arsenide and indium phosphide) to obtain the desired transport of electronic charge and control of current. The field of microelectronics involves a significant amount of chemistry and material science and requires the electronic engineer working in the field to have a very good working knowledge of the effects of quantum mechanics.

Signal processing

A Bayer filter on a CCD requires signal processing to get a red, green, and blue value at each pixel.

Signal processing deals with the analysis and manipulation of signals. Signals can be either analog, in which case the signal varies continuously according to the information, or digital, in which case the signal varies according to a series of discrete values representing the information. For analog signals, signal processing may involve the amplification and filtering of audio signals for audio equipment or the modulation and demodulation of signals for telecommunications. For digital signals, signal processing may involve the compression, error detection and error correction of digitally sampled signals.

Signal Processing is a very mathematically oriented and intensive area forming the core of digital signal processing and it is rapidly expanding with new applications in every field of electrical engineering such as communications, control, radar, audio engineering, broadcast engineering, power electronics, and biomedical engineering as many already existing analog systems are replaced with their digital counterparts. Analog signal processing is still important in the design of many control systems.

DSP processor ICs are found in many types of modern electronic devices, such as digital television sets, radios, Hi-Fi audio equipment, mobile phones, multimedia players, camcorders and digital cameras, automobile control systems, noise cancelling headphones, digital spectrum analyzers, missile guidance systems, radar systems, and telematics systems. In such products, DSP may be responsible for noise reduction, speech recognition or synthesis, encoding or decoding digital media, wirelessly transmitting or receiving data, triangulating positions using GPS, and other kinds of image processing, video processing, audio processing, and speech processing.

Instrumentation

Flight instruments provide pilots with the tools to control aircraft analytically.

Instrumentation engineering deals with the design of devices to measure physical quantities such as pressure, flow, and temperature. The design of such instruments requires a good understanding of physics that often extends beyond electromagnetic theory. For example, flight instruments measure variables such as wind speed and altitude to enable pilots the control of aircraft analytically. Similarly, thermocouples use the Peltier-Seebeck effect to measure the temperature difference between two points.

Often instrumentation is not used by itself, but instead as the sensors of larger electrical systems. For example, a thermocouple might be used to help ensure a furnace's temperature remains constant. For this reason, instrumentation engineering is often viewed as the counterpart of control.

Computers

Computer engineering deals with the design of computers and computer systems. This may involve the design of new hardware. Computer engineers may also work on a system's software. However, the design of complex software systems is often the domain of software engineering, which is usually considered a separate discipline. Desktop computers represent a tiny fraction of the devices a computer engineer might work on, as computer-like architectures are now found in a range of embedded devices including video game consoles and DVD players. Computer engineers are involved in many hardware and software aspects of computing. Robots are one of the applications of computer engineering.

Photonics and optics

Photonics and optics deals with the generation, transmission, amplification, modulation, detection, and analysis of electromagnetic radiation. The application of optics deals with design of optical instruments such as lenses, microscopes, telescopes, and other equipment that uses the properties of electromagnetic radiation. Other prominent applications of optics include electro-optical sensors and measurement systems, lasers, fiber optic communication systems, and optical disc systems (e.g. CD and DVD). Photonics builds heavily on optical technology, supplemented with modern developments such as optoelectronics (mostly involving semiconductors), laser systems, optical amplifiers and novel materials (e.g. metamaterials).

Related disciplines

The Bird VIP Infant ventilator

Mechatronics is an engineering discipline which deals with the convergence of electrical and mechanical systems. Such combined systems are known as electromechanical systems and have widespread adoption. Examples include automated manufacturing systems, heating, ventilation and air-conditioning systems, and various subsystems of aircraft and automobilesElectronic systems design is the subject within electrical engineering that deals with the multi-disciplinary design issues of complex electrical and mechanical systems.

The term mechatronics is typically used to refer to macroscopic systems but futurists have predicted the emergence of very small electromechanical devices. Already, such small devices, known as Microelectromechanical systems (MEMS), are used in automobiles to tell airbags when to deploy, in digital projectors to create sharper images, and in inkjet printers to create nozzles for high definition printing. In the future it is hoped the devices will help build tiny implantable medical devices and improve optical communication.

In Aerospace engineering and robotics, an example is the most recent electric propulsion and ion propulsion.

Education

Electrical engineers typically possess an academic degree with a major in electrical engineering, electronics engineering, electrical engineering technology, or electrical and electronic engineering. The same fundamental principles are taught in all programs, though emphasis may vary according to title. The length of study for such a degree is usually four or five years and the completed degree may be designated as a Bachelor of Science in Electrical/Electronics Engineering Technology, Bachelor of Engineering, Bachelor of Science, Bachelor of Technology, or Bachelor of Applied Science, depending on the university. The bachelor's degree generally includes units covering physics, mathematics, computer science, project management, and a variety of topics in electrical engineering. Initially such topics cover most, if not all, of the subdisciplines of electrical engineering. At some schools, the students can then choose to emphasize one or more subdisciplines towards the end of their courses of study.

An example circuit diagram, which is useful in circuit design and troubleshooting.

At many schools, electronic engineering is included as part of an electrical award, sometimes explicitly, such as a Bachelor of Engineering (Electrical and Electronic), but in others, electrical and electronic engineering are both considered to be sufficiently broad and complex that separate degrees are offered.

Some electrical engineers choose to study for a postgraduate degree such as a Master of Engineering/Master of Science (MEng/MSc), a Master of Engineering Management, a Doctor of Philosophy (PhD) in Engineering, an Engineering Doctorate (Eng.D.), or an Engineer's degree. The master's and engineer's degrees may consist of either research, coursework or a mixture of the two. The Doctor of Philosophy and Engineering Doctorate degrees consist of a significant research component and are often viewed as the entry point to academia. In the United Kingdom and some other European countries, Master of Engineering is often considered to be an undergraduate degree of slightly longer duration than the Bachelor of Engineering rather than a standalone postgraduate degree.

Professional practice

Belgian electrical engineers inspecting the rotor of a 40,000 kilowatt turbine of the General Electric Company in New York City

In most countries, a bachelor's degree in engineering represents the first step towards professional certification and the degree program itself is certified by a professional body. After completing a certified degree program the engineer must satisfy a range of requirements (including work experience requirements) before being certified. Once certified the engineer is designated the title of Professional Engineer (in the United States, Canada and South Africa), Chartered engineer or Incorporated Engineer (in India, Pakistan, the United Kingdom, Ireland and Zimbabwe), Chartered Professional Engineer (in Australia and New Zealand) or European Engineer (in much of the European Union).

The IEEE corporate office is on the 17th floor of 3 Park Avenue in New York City

The advantages of licensure vary depending upon location. For example, in the United States and Canada "only a licensed engineer may seal engineering work for public and private clients". This requirement is enforced by state and provincial legislation such as Quebec's Engineers Act. In other countries, no such legislation exists. Practically all certifying bodies maintain a code of ethics that they expect all members to abide by or risk expulsion. In this way these organizations play an important role in maintaining ethical standards for the profession. Even in jurisdictions where certification has little or no legal bearing on work, engineers are subject to contract law. In cases where an engineer's work fails he or she may be subject to the tort of negligence and, in extreme cases, the charge of criminal negligence. An engineer's work must also comply with numerous other rules and regulations, such as building codes and legislation pertaining to environmental law.

Professional bodies of note for electrical engineers include the Institute of Electrical and Electronics Engineers (IEEE) and the Institution of Engineering and Technology (IET). The IEEE claims to produce 30% of the world's literature in electrical engineering, has over 360,000 members worldwide and holds over 3,000 conferences annually. The IET publishes 21 journals, has a worldwide membership of over 150,000, and claims to be the largest professional engineering society in Europe. Obsolescence of technical skills is a serious concern for electrical engineers. Membership and participation in technical societies, regular reviews of periodicals in the field and a habit of continued learning are therefore essential to maintaining proficiency. An MIET(Member of the Institution of Engineering and Technology) is recognised in Europe as an Electrical and computer (technology) engineer.

In Australia, Canada, and the United States electrical engineers make up around 0.25% of the labor force.

Tools and work

From the Global Positioning System to electric power generation, electrical engineers have contributed to the development of a wide range of technologies. They design, develop, test, and supervise the deployment of electrical systems and electronic devices. For example, they may work on the design of telecommunication systems, the operation of electric power stations, the lighting and wiring of buildings, the design of household appliances, or the electrical control of industrial machinery.

Satellite communications is typical of what electrical engineers work on.

Fundamental to the discipline are the sciences of physics and mathematics as these help to obtain both a qualitative and quantitative description of how such systems will work. Today most engineering work involves the use of computers and it is commonplace to use computer-aided design programs when designing electrical systems. Nevertheless, the ability to sketch ideas is still invaluable for quickly communicating with others.

Although most electrical engineers will understand basic circuit theory (that is the interactions of elements such as resistors, capacitors, diodes, transistors, and inductors in a circuit), the theories employed by engineers generally depend upon the work they do. For example, quantum mechanics and solid state physics might be relevant to an engineer working on VLSI (the design of integrated circuits), but are largely irrelevant to engineers working with macroscopic electrical systems. Even circuit theory may not be relevant to a person designing telecommunication systems that use off-the-shelf components. Perhaps the most important technical skills for electrical engineers are reflected in university programs, which emphasize strong numerical skills, computer literacy, and the ability to understand the technical language and concepts that relate to electrical engineering.

A laser bouncing down an acrylic rod, illustrating the total internal reflection of light in a multi-mode optical fiber.

A wide range of instrumentation is used by electrical engineers. For simple control circuits and alarms, a basic multimeter measuring voltage, current, and resistance may suffice. Where time-varying signals need to be studied, the oscilloscope is also an ubiquitous instrument. In RF engineering and high frequency telecommunications, spectrum analyzers and network analyzers are used. In some disciplines, safety can be a particular concern with instrumentation. For instance, medical electronics designers must take into account that much lower voltages than normal can be dangerous when electrodes are directly in contact with internal body fluids. Power transmission engineering also has great safety concerns due to the high voltages used; although voltmeters may in principle be similar to their low voltage equivalents, safety and calibration issues make them very different. Many disciplines of electrical engineering use tests specific to their discipline. Audio electronics engineers use audio test sets consisting of a signal generator and a meter, principally to measure level but also other parameters such as harmonic distortion and noise. Likewise, information technology have their own test sets, often specific to a particular data format, and the same is true of television broadcasting.

Radome at the Misawa Air Base Misawa Security Operations Center, Misawa, Japan

For many engineers, technical work accounts for only a fraction of the work they do. A lot of time may also be spent on tasks such as discussing proposals with clients, preparing budgets and determining project schedules. Many senior engineers manage a team of technicians or other engineers and for this reason project management skills are important. Most engineering projects involve some form of documentation and strong written communication skills are therefore very important.

The workplaces of engineers are just as varied as the types of work they do. Electrical engineers may be found in the pristine lab environment of a fabrication plant, on board a Naval ship, the offices of a consulting firm or on site at a mine. During their working life, electrical engineers may find themselves supervising a wide range of individuals including scientists, electricians, computer programmers, and other engineers.

Electrical engineering has an intimate relationship with the physical sciences. For instance, the physicist Lord Kelvin played a major role in the engineering of the first transatlantic telegraph cable. Conversely, the engineer Oliver Heaviside produced major work on the mathematics of transmission on telegraph cables. Electrical engineers are often required on major science projects. For instance, large particle accelerators such as CERN need electrical engineers to deal with many aspects of the project including the power distribution, the instrumentation, and the manufacture and installation of the superconducting electromagnets.

Cryogenics

From Wikipedia, the free encyclopedia https://en.wikipedia.org/wiki/Cryogenics...