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Bert Bolle Barometer
The Bert Bolle Barometer is a large water barometer. At over 12.5 metres tall, it is recognized as the largest barometer in the world by The International Guinness Book of Records. The instrument was created in 1985 in the Netherlands; in 2007 it was reinstalled in the new Visitor Centre of Denmark, Western Australia and was removed from there in 2011. History The Netherlands The Dutch writer and barometer specialist Bert Bolle (born 1947) designed and built the water barometer in 1985 as the focal point of the Barometer Museum, which he ran with his wife Ethne in the 18th-century country house ‘Rustenhoven’ at Maartensdijk in central Netherlands. In 1978 Bolle wrote a book titled ''Barometers'', which was translated into German and English. In 1983 he wrote a scientific sequel to his first book and developed some modifications of the mercury barometer system. In 1985 Bolle and his wife set up a barometer museum in their country house. Their aim was to create a collection ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Polymethylmethacrylate
Poly(methyl methacrylate) (PMMA) belongs to a group of materials called engineering plastics. It is a transparent thermoplastic. PMMA is also known as acrylic, acrylic glass, as well as by the trade names and brands Crylux, Plexiglas, Acrylite, Astariglas, Lucite, Perclax, and Perspex, among several others ( see below). This plastic is often used in sheet form as a lightweight or shatter-resistant alternative to glass. It can also be used as a casting resin, in inks and coatings, and for many other purposes. Although not a type of familiar silica-based glass, the substance, like many thermoplastics, is often technically classified as a type of glass, in that it is a non-crystalline vitreous substance—hence its occasional historic designation as ''acrylic glass''. Chemically, it is the synthetic polymer of methyl methacrylate. It was developed in 1928 in several different laboratories by many chemists, such as William Chalmers, Otto Röhm, and Walter Bauer, and first brought to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Big Things
''Big Things'' was a large-scale steel sculpture exhibition series organized by the North Edmonton Sculpture Workshop for the Royal Alberta Museum's outdoor South Terrace.Gilbert Bouchard, "Come to Expect 'Big Things'", Edmonton Journal, July 19, 2002Erik Floren, "Big Impressions", The Edmonton Sunday Sun, July 28, 2002Mike Berezowsky, "Sculpture Exhibit Gets a Big Response", Edmonton Examiner, September 11, 2002 The exhibition series began as an effort to "expose the public to the richness and diversity of contemporary sculpture in steel, while encouraging a critical dialogue between artists." Big Things The inaugural ''Big Things'' exhibition in 2002 was the first time the Royal Alberta Museum had ever displayed an exhibition of its kind, featuring nine large, abstract steel sculptures. According to the museum's assistant director Tim Willis, "''Dealing with abstract sculpture is not part of our core mandate.... It just goes to show how art can transform an inert public spac ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Australia's Big Things
The big things of Australia are large structures, some of which are novelty architecture and some are sculptures. There are estimated to be over 230 such objects around the country. There are big things in every state and territory in continental Australia. Most big things began as tourist traps found along major roads between destinations. The big things have become something of a cult phenomenon, and are sometimes used as an excuse for a road trip, where many or all big things are visited and used as a backdrop to a group photograph. Many of the big things are considered works of folk art and have been heritage-listed, though others have come under threat of demolition. List of big things (by state or territory) Australian Capital Territory New South Wales Northern Territory Queensland South Australia Tasmania Victoria Western Australia In popular culture *The London production of '' Priscilla, Queen of the Desert: the Musical'' references the Big Prawn ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bell Jar
A bell jar is a glass jar, similar in shape to a bell (i.e. in its best-known form it is open at the bottom, while its top and sides together are a single piece), and can be manufactured from a variety of materials (ranging from glass to different types of metals). Bell jars are often used in laboratories to form and contain a vacuum. It is a common science apparatus used in experiments. Bell jars have a limited ability to create strong vacuums; vacuum chambers are available when higher performance is needed. They have been used to demonstrate the effect of vacuum on sound propagation. In addition to their scientific applications, bell jars may also serve as display cases or transparent dust covers. In these situations the bell jar is not usually placed under vacuum. Vacuum A vacuum bell jar is placed on a base which is vented to a hose fitting, that can be connected via a hose to a vacuum pump. A vacuum is formed by pumping the air out of the bell jar. The lower edge of a va ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Galileo Galilei
Galileo di Vincenzo Bonaiuti de' Galilei (15 February 1564 – 8 January 1642) was an Italian astronomer, physicist and engineer, sometimes described as a polymath. Commonly referred to as Galileo, his name was pronounced (, ). He was born in the city of Pisa, then part of the Duchy of Florence. Galileo has been called the "father" of observational astronomy, modern physics, the scientific method, and modern science. Galileo studied speed and velocity, gravity and free fall, the principle of relativity, inertia, projectile motion and also worked in applied science and technology, describing the properties of pendulums and "hydrostatic balances". He invented the thermoscope and various military compasses, and used the telescope for scientific observations of celestial objects. His contributions to observational astronomy include telescopic confirmation of the phases of Venus, observation of the four largest satellites of Jupiter, observation of Saturn's rings, and a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vaisala
Vaisala Oyj () is a Finnish company that develops, manufactures and markets products and services for environmental and industrial measurement. Their major customer groups and markets are national meteorological and hydrological services, aviation authorities, defense forces, road authorities, the weather critical energy sector, life science and high-technology industries and building automation. Vaisala had over 1,900 employees and net sales of €379.5 million in 2020. Vaisala serves customers in more than 150 countries. The parent company Vaisala Oyj, domicile in Vantaa, Finland, is listed on the NASDAQ OMX Helsinki. Vaisala Group has offices and operations in Finland, the United States, Australia, Brazil, Canada, China, France, Germany, India, Italy, Japan, Kenya, Malaysia, México, South Korea, Sweden, United Arab Emirates, and the United Kingdom. History Vaisala originated in the 1930s when Professor Vilho Väisälä (1889–1969), Vaisala's founder and long-time manag ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Solenoid Valve
A solenoid valve is an electromechanically operated valve. Solenoid valves differ in the characteristics of the electric current they use, the strength of the magnetic field they generate, the mechanism they use to regulate the fluid, and the type and characteristics of fluid they control. The mechanism varies from linear action, plunger-type actuators to pivoted-armature actuators and rocker actuators. The valve can use a two-port design to regulate a flow or use a three or more port design to switch flows between ports. Multiple solenoid valves can be placed together on a manifold. Solenoid valves are the most frequently used control elements in fluidics. Their tasks are to shut off, release, dose, distribute or mix fluids. They are found in many application areas. Solenoids offer fast and safe switching, high-reliability, long service life, good medium compatibility of the materials used, low control power and compact design. Operation There are many valve design variation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Programmable Logic Controller
A programmable logic controller (PLC) or programmable controller is an industrial computer that has been ruggedized and adapted for the control of manufacturing processes, such as assembly lines, machines, robotic devices, or any activity that requires high reliability, ease of programming, and process fault diagnosis. Dick Morley is considered as the father of PLC as he had invented the first PLC, the Modicon 084, for General Motors in 1968. PLCs can range from small modular devices with tens of inputs and outputs (I/O), in a housing integral with the processor, to large rack-mounted modular devices with thousands of I/O, and which are often networked to other PLC and SCADA systems. They can be designed for many arrangements of digital and analog I/O, extended temperature ranges, immunity to electrical noise, and resistance to vibration and impact. Programs to control machine operation are typically stored in battery-backed-up or non-volatile memory. PLCs were first devel ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sheila McHale
Sheila Margaret McHale (born 1 September 1953) born is a former Labor Party MP in the Government of Western Australia. Prior to retirement, she served as Member for Kenwick and Minister for Disability Services, Tourism, Culture and the Arts, and Consumer Protection. Born in Yorkshire, England she emigrated to Western Australia in 1978. She was first elected to State Parliament in 1996 and served as the Shadow Minister for Health, the Arts and Heritage. During this period, she spent three years as an elected councillor for the City of South Perth The City of South Perth is a Local government areas of Western Australia, local government area in the inner southern List of Perth suburbs, suburbs of the Western Australian capital city of Perth about south of Perth central business distr .... In 2001, she was re-elected to state parliament as Gallop took power and undertook the position of Cabinet Minister, as Minister for Community Development, Women's Interests, Tourism ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Millibar
The bar is a metric unit of pressure, but not part of the International System of Units (SI). It is defined as exactly equal to 100,000 Pa (100 kPa), or slightly less than the current average atmospheric pressure on Earth at sea level (approximately 1.013 bar). By the barometric formula, 1 bar is roughly the atmospheric pressure on Earth at an altitude of 111 metres at 15 °C. The bar and the millibar were introduced by the Norwegian meteorologist Vilhelm Bjerknes, who was a founder of the modern practice of weather forecasting. The International System of Units, despite previously mentioning the bar, now omits any mention of it.. The bar has been legally recognised in countries of the European Union since 2004.British Standard BS 350:2004 ''Conversion Factors for Units''. The US National Institute of Standards and Technology (NIST) deprecates its use except for "limited use in meteorology" and lists it as one of several units that "must not be introduced ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Centimeters
330px, Different lengths as in respect to the Electromagnetic spectrum, measured by the Metre and its deriveds scales. The Microwave are in-between 1 meter to 1 millimeter. A centimetre (international spelling) or centimeter (American spelling) (SI symbol cm) is a Units of measurement, unit of length in the International System of Units (SI), equal to one hundredth of a metre, ''centi'' being the SI prefix for a factor of . The centimetre was the base unit of length in the now deprecated centimetre–gram–second (CGS) system of units. Though for many physical quantities, SI prefixes for factors of 103—like ''milli-'' and ''kilo-''—are often preferred by technicians, the centimetre remains a practical unit of length for many everyday measurements. A centimetre is approximately the width of the fingernail of an average adult person. Equivalence to other units of length : One millilitre is defined as one cubic centimetre, under the SI system of units. Other uses In ad ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
