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Artificial Christmas Tree
An artificial or fake Christmas tree is an artificial pine or fir tree manufactured for the specific purpose of use as a Christmas tree. The earliest artificial Christmas trees were wooden, tree-shaped pyramids or feather trees, both developed by Germans. Most modern trees are made of polyvinyl chloride (PVC) but many other types of trees have been and are available, including aluminum Christmas trees and Fiber optic#Other uses of optical fibers, fiber-optic illuminated Christmas trees. History The first artificial Christmas trees were developed in Germany during the 19th century, though earlier examples exist. These "trees" were made using goose feathers that were dyed green.Forbes, Bruce David. ''Christmas: A Candid History'',Google Books, University of California Press, 2007, pp. 121–22, () The German feather trees were one response by Germans to continued deforestation in Germany. Developed in the 1880s, the feather trees became increasingly popular during the early part of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fiber-optic Christmas Tree
An optical fiber, or optical fibre, is a flexible glass or plastic fiber that can transmit light from one end to the other. Such fibers find wide usage in fiber-optic communications, where they permit transmission over longer distances and at higher Bandwidth (computing), bandwidths (data transfer rates) than electrical cables. Fibers are used instead of metal wires because signals travel along them with less Attenuation, loss and are immune to electromagnetic interference. Fibers are also used for illumination (lighting), illumination and imaging, and are often wrapped in bundles so they may be used to carry light into, or images out of confined spaces, as in the case of a fiberscope. Specially designed fibers are also used for a variety of other applications, such as fiber optic sensors and fiber lasers. Glass optical fibers are typically made by Drawing (manufacturing), drawing, while plastic fibers can be made either by drawing or by extrusion. Optical fibers typically incl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
The Baltimore Sun
''The Baltimore Sun'' is the largest general-circulation daily newspaper based in the U.S. state of Maryland and provides coverage of local, regional, national, and international news. Founded in 1837, the newspaper was owned by Tribune Publishing until May 2021, when it was acquired by Alden Global Capital, which operates its media properties through Digital First Media. David D. Smith, the executive chairman of Sinclair Broadcast Group, closed a deal to buy the paper on January 15, 2024. History 19th century ''The Sun'' was founded on May 17, 1837, by Arunah Shepherdson Abell and two associates, William Moseley Swain from Rhode Island, and Azariah H. Simmons from Philadelphia, where they had started and published the '' Public Ledger'' the year before. Abell became a journalist with the ''Providence Patriot'' and later worked with newspapers in New York City and Boston.Van Doren, Charles and Robert McKendry, ed., ''Webster's American Biographies''. (Springfield, Massa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Polyethylene
Polyethylene or polythene (abbreviated PE; IUPAC name polyethene or poly(methylene)) is the most commonly produced plastic. It is a polymer, primarily used for packaging (plastic bags, plastic films, geomembranes and containers including bottles, cups, jars, etc.). , over 100 million tonnes of polyethylene resins are being produced annually, accounting for 34% of the total plastics market. Many kinds of polyethylene are known, with most having the chemical formula (C2H4)''n''. PE is usually a mixture of similar polymers of ethylene, with various values of ''n''. It can be ''low-density'' or ''high-density'' and many variations thereof. Its properties can be modified further by crosslinking or copolymerization. All forms are nontoxic as well as chemically resilient, contributing to polyethylene's popularity as a multi-use plastic. However, polyethylene's chemical resilience also makes it a long-lived and decomposition-resistant pollutant when disposed of improperly. Being a h ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Christmas Tree World
Christmas is an annual festival commemorating the birth of Jesus Christ, observed primarily on December 25 as a religious and cultural celebration among billions of people around the world. A liturgical feast central to Christianity, Christmas preparation begins on the First Sunday of Advent and it is followed by Christmastide, which historically in the West lasts twelve days and culminates on Twelfth Night. Christmas Day is a public holiday in many countries, is observed religiously by a majority of Christians, as well as celebrated culturally by many non-Christians, and forms an integral part of the annual holiday season. The traditional Christmas narrative recounted in the New Testament, known as the Nativity of Jesus, says that Jesus was born in Bethlehem, in accordance with messianic prophecies. When Joseph and Mary arrived in the city, the inn had no room, and so they were offered a stable where the Christ Child was soon born, with angels proclaiming this news to s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ponderosa Pine
''Pinus ponderosa'', commonly known as the ponderosa pine, bull pine, blackjack pine, western yellow-pine, or filipinus pine, is a very large pine tree species of variable habitat native to mountainous regions of western North America. It is the most widely distributed pine species in North America.Safford, H.D. 2013. Natural Range of Variation (NRV) for yellow pine and mixed conifer forests in the bioregional assessment area, including the Sierra Nevada, southern Cascades, and Modoc and Inyo National Forests. Unpublished report. USDA Forest Service, Pacific Southwest Region, Vallejo, CA/ref> ''Pinus ponderosa'' grows in various erect forms from British Columbia southward and eastward through 16 western U.S. states and has been introduced in temperate regions of Europe and in New Zealand. It was first documented in modern science in 1826 in eastern Washington near present-day Spokane (of which it is the official city tree). On that occasion, David Douglas misidentified it a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Douglas Fir
The Douglas fir (''Pseudotsuga menziesii'') is an evergreen conifer species in the pine family, Pinaceae. It is the tallest tree in the Pinaceae family. It is native to western North America and is also known as Douglas-fir, Douglas spruce, Oregon pine, and Columbian pine. There are three varieties: coast Douglas-fir (''P. menziesii'' var. ''menziesii''), Rocky Mountain Douglas-fir (''P. menziesii'' var. ''glauca'') and Mexican Douglas-fir (''P. menziesii'' var. ''lindleyana''). Despite its common names, it is not a true fir (genus '' Abies''), spruce (genus '' Picea''), or pine (genus ''Pinus''). It is also not a hemlock; the genus name ''Pseudotsuga'' means "false hemlock". Description Douglas-firs are medium-sized to extremely large evergreen trees, tall (although only coast Douglas-firs reach heights near 100 m) and commonly reach in diameter, although trees with diameters of almost exist. The largest coast Douglas-firs regularly live over 500 years, with the ol ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
MP3 Player
A portable media player (PMP) or digital audio player (DAP) is a portable consumer electronics device capable of storing and playing digital media such as audio, images, and video files. Normally they refer to small, battery-powered devices utilising flash memory or a hard disk for storing various media files. MP3 players has been a popular alternative name used for such devices, even if they also support other file formats and media types other than MP3 (for example AAC, FLAC, WMA). Generally speaking, PMPs are equipped with a 3.5 mm headphone jack which can be used for headphones or to connect to a boombox, home audio system, or connect to car audio and home stereos wired or via a wireless connection such as Bluetooth, and some may include radio tuners, voice recording and other features. In contrast, analogue portable audio players play music from non-digital media that use analogue media, such as cassette tapes or vinyl records. As devices became more a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Canadian Standards Association
The CSA Group (formerly the Canadian Standards Association; CSA) is a standards organization which develops standards in 57 areas. CSA publishes standards in print and electronic form, and provides training and advisory services. CSA is composed of representatives from industry, government, and consumer groups. CSA began as the Canadian Engineering Standards Association (CESA) in 1919, federally chartered to create standards. During World War I, lack of interoperability between technical resources led to the formation of a standards committee. CSA is accredited by the Standards Council of Canada, a crown corporation which promotes voluntary standardization in Canada. This accreditation verifies that CSA is competent to carry out standards development and certification functions, and is based on internationally recognised criteria and procedures. The CSA registered mark shows that a product has been independently tested and certified to meet recognized standards for safety or per ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Underwriters Labs
The UL enterprise is a global private safety company headquartered in Northbrook, Illinois, composed of three organizations, UL Research Institutes, UL Standards & Engagement and UL Solutions. Established in 1894, the UL enterprise was founded as the Underwriters' Electrical Bureau (a bureau of the National Board of Fire Underwriters), and was known throughout the 20th century as Underwriters Laboratories. On January 1, 2012, Underwriters Laboratories became the parent company of a for-profit company in the U.S. named UL LLC, a limited liability company, which took over the product testing and certification business. On June 26, 2022, the companies rebranded into three distinct organizations that make up the UL enterprise. The company is one of several companies approved to perform safety testing by the U.S. federal agency Occupational Safety and Health Administration (OSHA). OSHA maintains a list of approved testing laboratories, which are known as Nationally Recognized Testing ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
CBS News
CBS News is the news division of the American television and radio broadcaster CBS. It is headquartered in New York City. CBS News television programs include ''CBS Evening News'', ''CBS Mornings'', news magazine programs ''CBS News Sunday Morning'', ''60 Minutes'', and ''48 Hours (TV program), 48 Hours'', and Sunday morning talk show, Sunday morning political affairs program ''Face the Nation''. CBS News Radio produces hourly newscasts for hundreds of radio stations, and also oversees CBS News podcasts like ''Major Garrett, The Takeout Podcast''. CBS News also operates CBS News 24/7, a 24-hour digital news network. Up until April 2021, the president and senior executive producer of CBS News was Susan Zirinsky, who assumed the role on March 1, 2019. Zirinsky, the first female president of the network's news division, was announced as the choice to replace David Rhodes (CBS News President), David Rhodes on January 6, 2019. The announcement came amid news that Rhodes would step do ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Prelit Tree
A pre-lit tree is an artificial Christmas tree which is pre-wired with Christmas lights. The lights are wrapped around the tree before it is sold, reducing set up time and making storage simpler. The lights cannot usually be removed from the tree because they are normally embedded within the artificial branches. The product may be sold as a kit - the user assembles the tree and plugs it into an electrical outlet - or the dealer may assemble it before the sale. Larger trees usually contain traditional strands of bulb lights or LEDs, while smaller tabletop trees may have fiber-optic branches. Pre-lit trees are categorised under the headings of electrical goods. History The first lighted Christmas trees made use of candles. Attaching the candles was a difficult process, and proved to be a fire hazard. The tree could not be safely left unattended when the candles were lit. A bucket of water also had to be kept near the tree and someone had to keep watch for a possible fire. Candle ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
A Charlie Brown Christmas
''A Charlie Brown Christmas'' is a 1965 animated television special. It is the first TV special based on the comic strip ''Peanuts'', by Charles M. Schulz, and features the voices of Peter Robbins, Christopher Shea, Kathy Steinberg, Tracy Stratford, and Bill Melendez. Produced by Lee Mendelson and directed by Melendez, the program made its debut on the CBS television network on December 9, 1965. In the special, Charlie Brown (Robbins) finds himself depressed despite the onset of the cheerful holiday season. After Lucy van Pelt (Stratford) suggests he direct a neighborhood Christmas play, his best efforts are ignored and mocked by his peers when he chooses a puny Christmas tree as a centerpiece. After the comic strip's debut in 1950, ''Peanuts'' had become a worldwide phenomenon by the mid-1960s. The special was commissioned and sponsored by The Coca-Cola Company, and was written over a period of several weeks, and produced on a small budget in six months. In casting the c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
