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Shabbat Clock
Many Jews who strictly observe Shabbat (the Sabbath) refrain from using electrical devices on Shabbat, with the exception of passive enjoyment of devices which were set up before Shabbat. Various rabbinical authorities have pronounced on what is permitted and what is not, but there are many disagreements in detailed interpretation, both between different individual authorities and between branches of Judaism. In Orthodox Judaism, it is generally discouraged to use electrical devices on Shabbat, but Orthodox Poskim (authorities) of Jewish law have disagreed about the basis of this claim since the early 20th century. Many Orthodox leaders have held that turning on an incandescent light bulb violates the Biblical prohibition against igniting a fire. However, the reasons for prohibiting the operation of an electrical appliance that does not involve heating metal to glowing temperatures (which is considered like kindling a fire because of the heat and light), are not agreed upon. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Teddy Bear Shabbat Lamp
Teddy is an English language given name, usually a hypocorism of Edward or Theodore. It may refer to: People Nickname * Teddy Atlas (born 1956), boxing trainer and fight commentator * Teddy Bourne (born 1948), British Olympic epee fencer * Teddy Bridgewater (born 1992), Minnesota Vikings quarterback * Teddy Dunn (born 1981), American actor * Teddy Edwards (1924–2003), American jazz saxophonist * Tivadar Farkasházy (born 1945), Hungarian humorist, author, mathematician, economist and journalist * Teddy Gipson (born 1980), American basketball player * Teddy Higuera (born 1957), former Major League Baseball pitcher * Teddy Hoad (1896–1986), West Indian cricketer * Ted Kennedy (1932–2009), long-serving American Senator from Massachusetts * Teddy Kollek (1911–2007), six-time mayor of Jerusalem * Theodore Long (born 1947), general manager for World Wrestling Entertainment * Teddy Morgan (1880–1949), Welsh international rugby union player * Teddy Park (born 1978) ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Milking
Milking is the act of removing milk from the mammary glands of cattle, water buffalo, humans, goats, sheep, and, more rarely, camels, horses and donkeys. Milking may be done by hand or by machine, and requires the animal to be currently or recently pregnant. The milker may refer either to the animal that produces the milk or the person who milks said animal. Hand milking Hand milking is performed by massaging and pulling down on the teats of the udder, squirting the milk into a bucket. Two main methods are used: *The top of the teat is pinched shut between finger and thumb, trapping milk in the lower part, which is then squeezed by the other fingers, squirting the milk out through the hole in the tip of the teat. *The top of the teat is pinched shut by the fingers and thumb, which are then slid down the teat, pushing the milk towards the bottom. Machine milking Most milking in the developed world is done using automatic milking, milking machines. Teat cups are attached to the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Samuel (Amora)
Samuel of Nehardea or Samuel bar Abba, often simply called Samuel ( Hebrew: שמואל) and occasionally Mar Samuel, was a Jewish Amora of the first generation; son of Abba bar Abba and head of the Yeshiva at Nehardea, Babylonia. He was a teacher of halakha, judge, physician, and astronomer. He was born about 165 CE at Nehardea, and died there in 254 CE. In the Talmud, Samuel is frequently associated with Abba Arikha ("Rav"), with whom he debated on many issues. Biography Birth As in the case of many other great men, a number of legendary stories are connected with his birth. His father, Abba bar Abba, subsequently known also by the Aramaic language designation Abuh di-Shemu'el ("father of Samuel"), was a silk-merchant. R. Yehuda ben Betheira ordered a silken garment from him, but refused to take it after Abba had procured it, and when the latter asked him the reason of his refusal, R. Yehuda answered, "The commission was only a spoken word, and was not sufficient to m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rav (Amora)
Abba Arikha (175–247 CE; Jewish Babylonian Aramaic: ; born: ''Rav Abba bar Aybo'', ), commonly known as Rav (), was a Jewish amora of the 3rd century. He was born and lived in Kafri, Asoristan, in the Sasanian Empire. Abba Arikha established at Sura the systematic study of the rabbinic traditions, which, using the Mishnah as text, led to the compilation of the Talmud. With him began the long period of ascendancy of the great Talmudic Academies in Babylonia around the year 220. In the Talmud, he is frequently associated with Samuel of Nehardea, with whom he debated many issues. Biography His surname, Arikha (English: ''the Tall''), he owed to his height, which exceeded that of his contemporaries. Others, reading Arekha, consider it an honorary title, "Lecturer". In the traditional literature he is referred to almost exclusively as Rav, "the Master", (both his contemporaries and posterity recognizing in him a master), just as his teacher, Judah HaNasi, was known simply ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gemara
The Gemara (also transliterated Gemarah, or in Yiddish Gemo(r)re; from Aramaic , from the Semitic root ג-מ-ר ''gamar'', to finish or complete) is the component of the Talmud comprising rabbinical analysis of and commentary on the Mishnah written in 63 books. At first, Gemara was only transmitted orally and was forbidden to be written down, however after the Mishnah was published by Judah the Prince (c. 200 CE), the work was studied exhaustively by generation after generation of rabbis in Babylonia and the Land of Israel. Their discussions were written down in a series of books that became the Gemara, which when combined with the Mishnah constituted the Talmud. There are two versions of the Gemara. The Jerusalem Talmud (Talmud Yerushalmi), also known as the Palestinian Talmud, was compiled by Jewish scholars of the Land of Israel, primarily of the academies of Tiberias and Caesarea, and was published between about 350–400 CE. The Talmud Bavli (Babylonian Talmud) was pu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shabbat (Talmud)
:''This is about part of the Talmud; for the Jewish day of rest, see Shabbat.'' Shabbat ( he, שַׁבָּת, lit. "Sabbath") is the first tractate of ''Seder Moed'' ("Order of Appointed Times") of the Mishnah and of the Talmud. The tractate deals with the laws and practices regarding observing the Jewish Sabbath (''Shabbat'' in Hebrew). The tractate focuses primarily on the categories and types of activities prohibited on the Sabbath according to interpretations of many verses in the Torah, notably and . The Mishnah and Talmud go to great lengths to carefully define and precisely determine the observance of the Sabbath. The tractate is thus one of the longest in terms of chapters in the Mishnah, and folio pages in the Talmud. It comprises 24 chapters and has a Gemara – rabbinical analysis of and commentary on the Mishnah – in both the Babylonian Talmud and all but the last four chapters of the Jerusalem Talmud. There is a Tosefta of 18 chapters on this tractate. As its nam ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Quenching
In materials science, quenching is the rapid cooling of a workpiece in water, oil, polymer, air, or other fluids to obtain certain material properties. A type of heat treating, quenching prevents undesired low-temperature processes, such as phase transformations, from occurring. It does this by reducing the window of time during which these undesired reactions are both thermodynamically favorable, and kinetically accessible; for instance, quenching can reduce the crystal grain size of both metallic and plastic materials, increasing their hardness. In metallurgy, quenching is most commonly used to harden steel by inducing a martensite transformation, where the steel must be rapidly cooled through its eutectoid point, the temperature at which austenite becomes unstable. In steel alloyed with metals such as nickel and manganese, the eutectoid temperature becomes much lower, but the kinetic barriers to phase transformation remain the same. This allows quenching to start at a lo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mishnah
The Mishnah or the Mishna (; he, מִשְׁנָה, "study by repetition", from the verb ''shanah'' , or "to study and review", also "secondary") is the first major written collection of the Jewish oral traditions which is known as the Oral Torah. It is also the first major work of rabbinic literature. The Mishnah was redacted by Judah ha-Nasi probably in Beit Shearim or Sepphoris at the beginning of the 3rd century CE in a time when, according to the Talmud, the persecution of the Jews and the passage of time raised the possibility that the details of the oral traditions of the Pharisees from the Second Temple period (516 BCE – 70 CE) would be forgotten. Most of the Mishnah is written in Mishnaic Hebrew, but some parts are in Aramaic. The Mishnah consists of six orders (', singular ' ), each containing 7–12 tractates (', singular ' ; lit. "web"), 63 in total, and further subdivided into chapters and paragraphs. The word ''Mishnah'' can also indicate a single paragraph of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mishneh Torah
The ''Mishneh Torah'' ( he, מִשְׁנֵה תּוֹרָה, , repetition of the Torah), also known as ''Sefer Yad ha-Hazaka'' ( he, ספר יד החזקה, , book of the strong hand, label=none), is a code of Rabbinic Jewish religious law (''halakha'') authored by Maimonides (Rabbi Moshe ben Maimon/Rambam). The ''Mishneh Torah'' was compiled between 1170 and 1180 CE (4930 and 4940 AM), while Maimonides was living in Egypt, and is regarded as Maimonides' ''magnum opus''. Accordingly, later sources simply refer to the work as "''Maimon''", "''Maimonides''", or "''RaMBaM''", although Maimonides composed other works. ''Mishneh Torah'' consists of fourteen books, subdivided into sections, chapters, and paragraphs. It is the only Medieval-era work that details all of Jewish observance, including those laws that are only applicable when the Temple in Jerusalem is in existence, and remains an important work in Judaism. Its title is an appellation originally used for the Biblical boo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Raavad
Abraham ben David ( – 27 November 1198), also known by the abbreviation RABaD (for ''Rabbeinu'' Abraham ben David) Ravad or RABaD III, was a Provençal rabbi, a great commentator on the Talmud, ''Sefer Halachot'' of Rabbi Yitzhak Alfasi and '' Mishne Torah'' of Maimonides, and is regarded as a father of Kabbalah and one of the key and important links in the chain of Jewish mystics. Biography RABaD's maternal grandfather, Rabbi Yitzhak b. Yaakov Ibn Baruch of Mérida (1035–1094), who had compiled astronomical tables for the son of Shemuel ha-Nagid, was one of five rabbis in Spain renowned for their learning. Concerning the oral history of his maternal grandfather's family and how they came to Spain, the RABaD wrote: "When Titus prevailed over Jerusalem, his officer who was appointed over Hispania appeased him, requesting that he send to him captives made-up of the nobles of Jerusalem, and so he sent a few of them to him, and there were amongst them those who made curtains an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hebrew
Hebrew (; ; ) is a Northwest Semitic language of the Afroasiatic language family. Historically, it is one of the spoken languages of the Israelites and their longest-surviving descendants, the Jews and Samaritans. It was largely preserved throughout history as the main liturgical language of Judaism (since the Second Temple period) and Samaritanism. Hebrew is the only Canaanite language still spoken today, and serves as the only truly successful example of a dead language that has been revived. It is also one of only two Northwest Semitic languages still in use, with the other being Aramaic. The earliest examples of written Paleo-Hebrew date back to the 10th century BCE. Nearly all of the Hebrew Bible is written in Biblical Hebrew, with much of its present form in the dialect that scholars believe flourished around the 6th century BCE, during the time of the Babylonian captivity. For this reason, Hebrew has been referred to by Jews as '' Lashon Hakodesh'' (, ) since an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Activities Prohibited On Shabbat
The 39 Melakhot ( he, ל״ט אבות מלאכה, '' lamed-tet avot melakhah'', "39 categories of work") are thirty-nine categories of activity which Jewish law identifies as prohibited by biblical law on Shabbat. Many of these activities are also prohibited on the Jewish holidays listed in the Torah, although there are significant exceptions that permit carrying and preparing food under specific circumstances on holidays (except Yom Kippur). In addition to the 39 melakhot, certain other activities are forbidden on Shabbat due to rabbinic law. There are often disagreements between Orthodox Jews and Conservative Jews or other non-Orthodox Jews as to the practical observance of Shabbat. It is of note that the (strict) observance of Shabbat is often seen as a benchmark for orthodoxy and indeed has legal bearing on the way a Jew is seen by an Orthodox religious court regarding their affiliation to Judaism. The commandment The commandment to keep Shabbat as a day of rest is repeated ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
