|
Point Stephens Light
The Point Stephens Light is a heritage-listed active lighthouse located on Point Stephens, a point on an unnamed headland at the east of Fingal Bay, south of the entrance of Port Stephens, New South Wales, Australia. The light serves to assist vessels entering Port Stephens. It is considered an endangered lighthouse due to remote location and old age. Proposed in 1857, the heritage-listed lighthouse was built in 1862. Designed by Alexander Dawson, the New South Wales Government Architect at that time, both the lighthouse's flared base and the keeper's cottages combined terrace are unique architectural features for the period. The light source used was originally kerosene lamps, which upgraded in 1912 to a Dalén light, upgraded again to electric light in 1960, automated in 1973, and finally converted to solar power in 1990. In 1991, the last caretaker withdrew from the premises and very soon after the keeper's cottages were vandalised and burned. The tower is designed in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
New South Wales State Heritage Register
The New South Wales State Heritage Register, also known as NSW State Heritage Register, is a heritage list of places in the state of New South Wales, Australia, that are protected by New South Wales legislation, generally covered by the Heritage Act 1977 and its 2010 amendments. The register is administered by the Heritage Council of NSW via Heritage NSW, a division of the Government of New South Wales Department of Planning and Environment. The register was created in 1999 and includes items protected by heritage schedules that relate to the State, and to regional and to local environmental plans. As a result, the register contains over 20,000 statutory-listed items in either public or private ownership of historical, cultural, and architectural value. Of those items listed, approximately 1,785 items are listed as significant items for the whole of New South Wales; with the remaining items of local or regional heritage value. The items include buildings, objects, monuments, A ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Catadioptric
A catadioptric optical system is one where refraction and reflection are combined in an optical system, usually via lenses (dioptrics) and curved mirrors (catoptrics). Catadioptric combinations are used in focusing systems such as searchlights, headlamps, early lighthouse focusing systems, optical telescopes, microscopes, and telephoto lenses. Other optical systems that use lenses and mirrors are also referred to as "catadioptric", such as surveillance catadioptric sensors. Early catadioptric systems Catadioptric combinations have been used for many early optical systems. In the 1820s, Augustin-Jean Fresnel developed several catadioptric lighthouse reflectors. Léon Foucault developed a catadioptric microscope in 1859 to counteract aberrations of using a lens to image objects at high power. In 1876 a French engineer, A. Mangin, invented what has come to be called the Mangin mirror, a concave glass reflector with the silver surface on the rear side of the glass. The two surfaces o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
NSW National Parks & Wildlife Service
The National Parks and Wildlife Service (NPWS) is a directorate of the New South Wales Department of Planning and Environment responsible for managing most of the protected areas in the state of New South Wales, Australia. Despite its name the NPWS is a state agency rather than a national one, with similarly named counterparts fulfilling comparable functions in other states and territories. History The NPWS was established in 1967 when the Fauna Protection Panel and the Parks and Reserves Branch of the NSW Lands Department were amalgamated under Lands Minister Tom Lewis . Lewis also established a charity, the National Parks Foundation, to assist the NPWS in raising funds for conservation. The first Director of the NPWS was Sam P. Weems, formerly of the US National Park Service. Seven years after the founding of the NPWS, various state laws regulating flora and fauna were consolidated together into the ''National Parks and Wildlife Act 1974'', which remains the enabling legi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Electric Battery
An electric battery is a source of electric power consisting of one or more electrochemical cells with external connections for powering electrical devices. When a battery is supplying power, its positive terminal is the cathode and its negative terminal is the anode. The terminal marked negative is the source of electrons that will flow through an external electric circuit to the positive terminal. When a battery is connected to an external electric load, a redox reaction converts high-energy reactants to lower-energy products, and the free-energy difference is delivered to the external circuit as electrical energy. Historically the term "battery" specifically referred to a device composed of multiple cells; however, the usage has evolved to include devices composed of a single cell. Primary (single-use or "disposable") batteries are used once and discarded, as the electrode materials are irreversibly changed during discharge; a common example is the alkaline battery used f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Solar Power
Solar power is the conversion of energy from sunlight into electricity, either directly using photovoltaics (PV) or indirectly using concentrated solar power. Photovoltaic cells convert light into an electric current using the photovoltaic effect. Concentrated solar power systems use lenses or mirrors and solar tracking systems to focus a large area of sunlight to a hot spot, often to drive a steam turbine. Photovoltaics were initially solely used as a source of electricity for small and medium-sized applications, from the calculator powered by a single solar cell to remote homes powered by an off-grid rooftop PV system. Commercial concentrated solar power plants were first developed in the 1980s. Since then, as the cost of solar electricity has fallen, grid-connected solar PV systems have grown more or less exponentially. Millions of installations and gigawatt-scale photovoltaic power stations continue to be built, with half of new generation capacity being solar in 2021. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
National Trust Of Australia
The National Trust of Australia, officially the Australian Council of National Trusts (ACNT), is the Australian national peak body for community-based, non-government non-profit organisations committed to promoting and conserving Australia's Indigenous, natural and historic heritage. The umbrella body was incorporated in 1965, with member organisations in every state and territory of Australia. History Modelled on the National Trust for Places of Historic Interest or Natural Beauty and inspired by local campaigns to conserve native bushland and preserve old buildings, the first Australian National Trusts were formed in New South Wales in 1945, South Australia in 1955 and Victoria in 1956; followed later in Western Australia, Tasmania and Queensland. The two Territory Trusts were the last to be founded, in 1976 (see below). The driving force behind the establishment of the National Trust in Australia was Annie Forsyth Wyatt (1885–1961). She lived for much of her life in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Diesel Generator
A diesel generator (DG) (also known as a diesel Genset) is the combination of a diesel engine with an electric generator (often an alternator) to generate electrical energy. This is a specific case of engine generator. A diesel compression-ignition engine is usually designed to run on diesel fuel, but some types are adapted for other liquid fuels or natural gas. Diesel generating sets are used in places without connection to a power grid, or as an emergency power supply if the grid fails, as well as for more complex applications such as peak-lopping, grid support, and export to the power grid. Diesel generator size is crucial to minimize low load or power shortages. Sizing is complicated by the characteristics of modern electronics, specifically non-linear loads. In size ranges around 50 MW and above, an open cycle gas turbine is more efficient at full load than an array of diesel engines, and far more compact, with comparable capital costs; but for regular part-loading, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Submarine Power Cable
A submarine power cable is a transmission cable for carrying electric power below the surface of the water.Underwater Cable an Alternative to Electrical Towers Matthew L. Wald, '''', 2010-03-16, accessed 2010-03-18. These are called "submarine" because they usually carry electric power beneath (arms of the , |
Mains Electricity
Mains electricity or utility power, power grid, domestic power, and wall power, or in some parts of Canada as hydro, is a general-purpose alternating-current (AC) electric power supply. It is the form of electrical power that is delivered to homes and businesses through the electric grid in many parts of the world. People use this electricity to power everyday items—such as domestic appliances, televisions and lamps—by plugging them into a wall outlet. The voltage and frequency of electric power differs between regions. In much of the world, a voltage (nominally) of 230 volts and frequency of 50 Hz is used. In North America, the most common combination is 120 V and a frequency of 60 Hz. Other combinations exist, for example, 230 V at 60 Hz. Travellers' portable appliances may be inoperative or damaged by foreign electrical supplies. Non-interchangeable plugs and sockets in different regions provide some protection from accidental use of appliances ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dioptric
Dioptrics is the branch of optics dealing with refraction, similarly the branch dealing with mirror A mirror or looking glass is an object that Reflection (physics), reflects an image. Light that bounces off a mirror will show an image of whatever is in front of it, when focused through the lens of the eye or a camera. Mirrors reverse the ...s is known as catoptrics. Dioptrics is the study of the refraction of light, especially by lens (optics), lenses. Optical telescope, Telescopes that create their image with an Objective (optics), objective that is a Lens (optics)#Types of simple lenses, convex lens (Refracting telescope, refractors) are said to be "dioptric" telescopes. An early study of dioptrics was conducted by Ptolemy in relationship to the human eye as well as refraction in media such as water. The understanding of the principles of dioptrics was further expanded by Alhazen, considered the List of people known as the father or mother of something, father of mode ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Terracotta
Terracotta, terra cotta, or terra-cotta (; ; ), in its material sense as an earthenware substrate, is a clay-based ceramic glaze, unglazed or glazed ceramic where the pottery firing, fired body is porous. In applied art, craft, construction, and architecture, terracotta is the term normally used for sculpture made in earthenware and also for various practical uses, including bowl (vessel), vessels (notably flower pots), water and waste water pipes, tile, roofing tiles, bricks, and surface embellishment in building construction. The term is also used to refer to the natural Terra cotta (color), brownish orange color of most terracotta. In archaeology and art history, "terracotta" is often used to describe objects such as figurines not made on a potter's wheel. Vessels and other objects that are or might be made on a wheel from the same material are called earthenware pottery; the choice of term depends on the type of object rather than the material or firing technique. Unglazed ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Slate
Slate is a fine-grained, foliated, homogeneous metamorphic rock derived from an original shale-type sedimentary rock composed of clay or volcanic ash through low-grade regional metamorphism. It is the finest grained foliated metamorphic rock. Foliation may not correspond to the original sedimentary layering, but instead is in planes perpendicular to the direction of metamorphic compression. The foliation in slate is called "slaty cleavage". It is caused by strong compression causing fine grained clay flakes to regrow in planes perpendicular to the compression. When expertly "cut" by striking parallel to the foliation, with a specialized tool in the quarry, many slates will display a property called fissility, forming smooth flat sheets of stone which have long been used for roofing, floor tiles, and other purposes. Slate is frequently grey in color, especially when seen, en masse, covering roofs. However, slate occurs in a variety of colors even from a single locality; for ex ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
.svg "Click for more on -> Electric Battery")
_Generator_Set.jpg "Click for more on -> Diesel Generator")
.jpg "Click for more on -> Terracotta")
