The micrometre or micrometer commonly known by the previous name micron, is an SI derived unit of length equalling 1×10−6 metre. The micrometre is a common unit of measurement for wavelengths of infrared radiation as well as sizes of biological cells and bacteria, for grading wool by the diameter of the fibres; the width of a single human hair ranges from 20 to 200 μm. The longest human chromosome is 10 μm in length. Between 1 μm and 10 μm: 1–10 μm – length of a typical bacterium 10 μm – Size of fungal hyphae 5 μm – length of a typical human spermatozoon's head 3–8 μm – width of strand of spider web silk about 10 μm – size of a fog, mist, or cloud water droplet Between 10 μm and 100 μm: about 10–12 μm – thickness of plastic wrap 10 to 55 μm – width of wool fibre 17 to 181 μm – diameter of human hair 70 to 180 μm – thickness of paper The term micron and the symbol μ were accepted for use in isolation to denote the micrometre in 1879, but revoked by the International System of Units in 1967.
This became necessary because the older usage was incompatible with the official adoption of the unit prefix micro-, denoted μ, during the creation of the SI in 1960. In the SI, the systematic name micrometre became the official name of the unit, μm became the official unit symbol. In practice, "micron" remains a used term in preference to "micrometre" in many English-speaking countries, both in academic science and in applied science and industry. Additionally, in American English, the use of "micron" helps differentiate the unit from the micrometer, a measuring device, because the unit's name in mainstream American spelling is a homograph of the device's name. In spoken English, they may be distinguished by pronunciation, as the name of the measuring device is invariably stressed on the second syllable, whereas the systematic pronunciation of the unit name, in accordance with the convention for pronouncing SI units in English, places the stress on the first syllable; the plural of micron is "microns", though "micra" was used before 1950.
The official symbol for the SI prefix micro- is a Greek lowercase mu. In Unicode, there is a micro sign with the code point U+00B5, distinct from the code point U+03BC of the Greek letter lowercase mu. According to the Unicode Consortium, the Greek letter character is preferred, but implementations must recognize the micro sign as well. Most fonts use the same glyph for the two characters. Metric prefix Metric system Orders of magnitude Wool measurement The dictionary definition of micrometre at Wiktionary
ANSI C12.22 is the American National Standard for Protocol Specification for Interfacing to Data Communication Networks ANSI C12.22/IEEE Std 1703 describe a protocol for transporting ANSI C12.19 table data over networks, for the purpose of interoperability among communications modules and meters. This standard uses AES encryption to enable strong, secure communications, including confidentiality and data integrity; the cipher mode used, a derivation of EAX mode called EAX', is provably secure in the context of C12.22. However, this cipher mode cannot be used securely for non-standard short messages, its security model is extensible to support new security mechanisms. ANSI C12.22/IEEE Std 1703 define message services which are components of an Advanced Metering Infrastructure for smart grids. There is RFC 6142 for transporting C12.22 data using TCP and UDP transport over IP networks. The ANSI C12.22 / IEEE Std 1703 service and domains consist of ANSI C12.22 / IEEE Std 1703 Network Segments and ANSI C12.22 / IEEE Std 1703 Nodes that are managed by distributed trusted centers, network relays and gateways.
As smart grid AMI networks evolve, ANSI C12.22 / IEEE 1703 domains may be created to service the utilities' Field Area Networks and the Home/Premise Area Networks. Nodes that operate in these domains must be registered with unique application title names that need to be registered; the ANSI C12.22 standard at NEMA 1703-2012 - IEEE Standard for Local Area Network/Wide Area Network Node Communication Protocol to Complement the Utility Industry End Device Data Tables The ANSI C12.19 / IEEE Std 1377 and ANSI ANSI C12.22 / IEEE Std 1703 Registry at ECMX North American End Device Registration Authority: In support of ANSI C12.19 / IEEE Std 1377 RFC 6142: ANSI C12.22, IEEE 1703, MC12.22 Transport Over IP
InterContinental Hong Kong is an InterContinental hotel in Hong Kong. It is located on Tsim Sha Tsui, Kowloon, on the former site of Holt's Wharf. InterContinental Hong Kong is close to many tourist attractions like Hong Kong Avenue of Stars, Hong Kong Cultural Centre, Hong Kong Space Museum and Star Ferry Pier; the hotel was opened in 1980 as The Regent Hong Kong and it was owned by New World Development and managed by Regent International Hotels. It sits on Kowloon's waterfront with views of the skyline of Hong Kong island. In June 2001, New World sold the hotel to Six Continents plc for GB£241 million. Six Continents rebranded the property as the InterContinental Hong Kong. In July 2015, InterContinental Hotels Group agreed to sell the InterContinental Hong Kong to Supreme Key, a consortium of investors, for US$938 million, it was reported that IHG will retain a 37-year management contract, with three 10-year extension rights. In March 2018, it was announced that the hotel will be closed for renovations in 2020 before reopening in 2021.
Subject to InterContinental Hotels' majority-stake acquisition of Regent Hotels, the hotel will reopen as a Regent once more. The Presidential Suite, billed at US$13,715 per night, is listed at number 15 on World's 15 most expensive hotel suites compiled by CNN Travel in 2012. Japanese restaurant'Nobu', part of the restaurant concept by chef Nobuyuki "Nobu" Matsuhisa is based at the hotel, since December 2006; the restaurant was listed at no. 15 on Asia's Top 20 Restaurants of the Miele Guide in the 2009/2010 edition. It was listed at no. 16 for the 2008/2009 and 2010/2011 editions. New World Centre, building complex next to the hotel Victoria Dockside, a re-development project of New World Centre InterContinental Hong Kong