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18th California
18 (eighteen) is the natural number following 17 and preceding 19. It is an even composite number. Mathematics 18 is a semiperfect number and an abundant number. It is a largely composite number, as it has 6 divisors and no smaller number has more than 6 divisors. There are 18 one-sided pentominoes. In the classification of finite simple groups, there are 18 infinite families of groups. In science Chemistry * The 18-electron rule is a rule of thumb in transition metal chemistry for characterising and predicting the stability of metal complexes. In religion and literature * The Hebrew word for "life" is ('' chai''), which has a numerical value of 18. Consequently, the custom has arisen in Jewish circles to give donations and monetary gifts in multiples of 18 as an expression of blessing for long life. * In Judaism, in the Talmud; Pirkei Avot (5:25), Rabbi Yehudah ben Teime gives the age of 18 as the appropriate age to get married (''"Ben shmonah esra lechupah"'', at eigh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Octodecimal
There are many different numeral systems, that is, writing systems for expressing numbers. By culture / time period "A ''base'' is a natural number B whose ''powers'' (B multiplied by itself some number of times) are specially designated within a numerical system." The term is not equivalent to radix, as it applies to all numerical notation systems (not just positional ones with a radix) and most systems of spoken numbers. Some systems have two bases, a smaller (subbase) and a larger (base); an example is Roman numerals, which are organized by fives (V=5, L=50, D=500, the subbase) and tens (X=10, C=100, M=1,000, the base). By type of notation Numeral systems are classified here as to whether they use positional notation (also known as place-value notation), and further categorized by radix or base. Standard positional numeral systems The common names are derived Hexadecimal#Etymology, somewhat arbitrarily from a mix of Latin and Greek language, Greek, in some cases incl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rule Of Thumb
In English language, English, the phrase ''rule of thumb'' refers to an approximate method for doing something, based on practical experience rather than theory. This usage of the phrase can be traced back to the 17th century and has been associated with various Trade (occupation), trades where quantities were measured by comparison to the width or length of a thumb. An erroneous folk etymology began circulating in the 1970s falsely connecting the origins of the phrase "rule of thumb" to legal doctrine on Domestic violence, domestic abuse. The error appeared in a number of law journals, and the United States Commission on Civil Rights published a report on domestic abuse titled "Under the Rule of Thumb" in 1982. Some efforts were made to discourage the phrase, which was seen as taboo owing to this false origin. During the 1990s, several authors correctly identified the spurious folk etymology; however, the connection to domestic violence was still being cited in some legal sources ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amidah
The ''Amidah'' (, ''Tefilat HaAmidah'', 'The Standing Prayer'), also called the ''Shemoneh Esreh'' ( 'eighteen'), is the central prayer of Jewish liturgy. Observant Jews recite the ''Amidah'' during each of the three services prayed on weekdays: Morning (''Shacharit''), afternoon ('' Mincha''), and evening ('' Ma'ariv''). On Shabbat, Rosh Chodesh ("Beginning of the Month"), and Jewish festivals, a fourth ''Amidah'' ('' Mussaf'') is recited after the morning Torah reading. Once annually, a fifth ''Amidah'' ('' Ne'ilah'') is recited around sunset on Yom Kippur. Due to the importance of the ''Amidah'', in rabbinic literature, it is simply called "''hatefila''" (, "the prayer"). According to legend, the prayer was composed by the "Men of the Great Assembly" (''Anshei Knesset HaGedolah''; –332 BCE). However, the fact that the prayer contains, next to Biblical Hebrew, many mishnaic terms, leads to the conclusion that it was composed and compiled during the mishnaic period ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Age Of Majority
The age of majority is the threshold of legal adulthood as recognized or declared in law. It is the moment when a person ceases to be considered a minor (law), minor, and assumes legal control over their person, actions, and decisions, thus terminating the control and legal responsibilities of their parents or guardian over them. Most countries set the age of majority at 18, but some jurisdictions have a higher age and others lower. The word ''majority'' here refers to having greater years and being of full age as opposed to ''minority'', the state of being a minor. The law in a given jurisdiction may not actually use the term "age of majority". The term refers to a collection of laws bestowing the status of adulthood. Explanation The term ''age of majority'' can be confused with the similar concept of the ''age of license''. As a legal term, ''license'' means ''permission'', referring to a legally enforceable right or privilege. Thus, the age of license for a specific activit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Coming Of Age
Coming of age is a young person's transition from being a child to being an adult. The specific age at which this transition takes place varies between societies, as does the nature of the change. It can be a simple legal convention or can be part of a ritual or spiritual event. In the past, and in some societies today, such a change is often associated with the age of sexual maturity ( puberty), especially menarche and spermarche. In others, it is associated with an age of religious responsibility. Particularly in Western societies, modern legal conventions stipulate points around the end of adolescence and the beginning of early adulthood (most commonly 16 and 18 though ranging from 14 to 21) when adolescents are generally no longer considered minors and are granted the full rights and responsibilities of an adult. Some cultures and countries have multiple coming of age ceremonies for multiple ages. Many cultures retain ceremonies to confirm the coming of age, and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chupah
A ''chuppah'' (, ) is a canopy under which a Judaism, Jewish couple stand during their Jewish wedding, wedding ceremony. It consists of a cloth or sheet, sometimes a tallit, stretched or supported over four poles, or sometimes manually held up by attendants to the ceremony. A chuppah symbolizes the home that the couple will build together. In a more general sense, ''chuppah'' refers to the method by which ''nessuin'', the second stage of a Jewish wedding, is accomplished. According to some opinions, it is accomplished by the couple standing under the canopy along with the rabbi who weds them; however, there are other views., Chapter 18 Customs A traditional chuppah, especially in Orthodox Judaism, recommends that there be open sky exactly above the chuppah, although this is not mandatory among Sephardic communities. If the wedding ceremony is held indoors in a hall, sometimes a special opening is built to be opened during the ceremony. Many Hasidic Judaism, Hasidim prefer t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pirkei Avot
Pirkei Avot (; also transliterated as ''Pirqei Avoth'' or ''Pirkei Avos'' or ''Pirke Aboth'', also ''Abhoth''), which translates into English as Chapters of the Fathers, is a compilation of the ethical teachings and maxims from Rabbinic Jewish tradition. It is part of didactic Jewish ethical literature. Because of its contents, the name is sometimes given as Ethics of the Fathers. Pirkei Avot consists of the Mishnaic tractate of ''Avot'', the second-to-last tractate in the order of Nezikin in the Mishnah, plus one additional chapter. Avot is unique in that it is the only tractate of the Mishnah dealing ''solely'' with ethical and moral principles; there is relatively little halakha (laws) in Pirkei Avot. Translation of the title In the title ''Pirkei Avot'', the word "pirkei" is Hebrew for "chapters of". The word ''avot'' means "fathers", and thus ''Pirkei Avot'' is often rendered in English as "Chapters of the Fathers", or (more loosely) "Ethics of the Fathers". This tra ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
