|
Brukkaros Mountain
Brukkaros Mountain (Khoekhoe language, Khoekhoe: ''Geitsi Gubib'') is a collapsed caldera in ǁKaras Region, Namibia. Measuring 1,590 metres at its peak on the eastern edge of the crater, Brukkaros is located about 15 kilometres northeast of the primarily Nama people, Nama town of Berseba and 100 kilometres north-northwest of Keetmanshoop.Brukkaros Mountain Namibia-1on1.com It is over 650 metres taller than the surrounding area, but the crater floor is 350 m below the rim. Description 
The mountain is a large caldera, in the form of a ring mountain (a so-called ''tuff ring'') with a diameter of about ...
[...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Namibia
Namibia (, ), officially the Republic of Namibia, is a country in Southern Africa. Its western border is the Atlantic Ocean. It shares land borders with Zambia and Angola to the north, Botswana to the east and South Africa to the south and east. Although Kazungula, it does not border Zimbabwe, less than 200 metres (660 feet) of the Botswanan right bank of the Zambezi, Zambezi River separates the two countries. Namibia gained independence from South Africa on 21 March 1990, following the Namibian War of Independence. Its capital and largest city is Windhoek. Namibia is a member state of the United Nations (UN), the Southern African Development Community (SADC), the African Union (AU) and the Commonwealth of Nations. The driest country in sub-Saharan Africa, Namibia has been inhabited since pre-historic times by the San people, San, Damara people, Damara and Nama people. Around the 14th century, immigration, immigrating Bantu peoples arrived as part of the Bantu expansion. Since ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Khoikhoi
Khoekhoen (singular Khoekhoe) (or Khoikhoi in the former orthography; formerly also ''Hottentot (racial term), Hottentots''"Hottentot, n. and adj." ''OED Online'', Oxford University Press, March 2018, www.oed.com/view/Entry/88829. Accessed 13 May 2018. Citing G. S. Nienaber, 'The origin of the name “Hottentot” ', ''African Studies'', 22:2 (1963), 65-90, . See also . ) are the traditionally Nomad, nomadic pastoralist Indigenous peoples of Africa, indigenous population of southwestern Africa. They are often grouped with the hunter-gatherer San people, San (literally "Foragers") peoples. The designation "Khoekhoe" is actually a ''kare'' or praise address, not an ethnic endonym, but it has been used in the literature as an ethnic term for Khoe–Kwadi languages, Khoe-speaking peoples of Southern Africa, particularly pastoralist groups, such as the Griqua people, !Ora, !Gona, Nama people, Nama, Khoemana, Xiri and Damara people, ǂNūkhoe nations. While the presence of Kho ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Brukkaros Pygmy Rock Mouse
The Brukkaros pygmy rock mouse (''Petromyscus monticularis'') is a species of rodent in the family Nesomyidae. It is found in Namibia and South Africa. Its natural habitat is subtropical or tropical dry shrubland Shrubland, scrubland, scrub, brush, or bush is a plant community characterized by vegetation dominated by shrubs, often also including grasses, herbs, and geophytes. Shrubland may either occur naturally or be the result of human activity. It m .... References * Coetzee, N. & Schlitter, D. 2004.Petromyscus monticularis 2006 IUCN Red List of Threatened Species. Downloaded on 19 July 2007. * Petromyscus Mammals described in 1925 Taxa named by Oldfield Thomas Taxa named by Martin Hinton Taxonomy articles created by Polbot Fauna of Namibia Fauna of South Africa {{muroid-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Geology Of Namibia
The geology of Namibia encompasses rocks of Paleoproterozoic, Mesoproterozoic and Neoproterozoic and Paleozoic to Cenozoic age. About 46% of the countryʼs surface are bedrock exposure, while the remainder is covered by the young overburden sediments of the Kalahari and Namib deserts. The country is famous for its mineral deposits of Tsumeb, as well as many geological sites of interest, from paleontological, geomorphological and volcanic character. Due to the exposure of the formations in a desert climate and the former German colony, the geology of Namibia is relatively well studied compared to the more tropical less exposed northern neighbors. Stratigraphy and tectonics Large areas of the Namibian geology exposed onshore are associated with the Late Proterozoic Pan-African orogenic cycle.Kukulus, 2004, p.10 The geology of Namibia is dominated in the north by metasediments of the Neoproterozoic Damara Belt (or Namibian System), while in the south large areas are underlain by ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Margaret Sordahl
Margaret Sordahl ( – ) was an ornithologist who worked for the Smithsonian Astrophysical Observatory. She collected two holotype specimens, '' Erythropygia coryphaeus abboti'' and '' Serinus albogularis sordahlae,'' the latter of which was named in her honour. Biography Margaret Froiland was born in in Milan. She married Lois Sordahl, who became Field Director for the Smithsonian Astrophysical Observatory. The couple met at St. Olaf College."Science to Take Youthful Couple to African Wild: Husband Will Study Sun among the Hottentots." Chicago Daily Tribune (1923-1963) Jul 24 1929: 25. ProQuest. 20 Jan. 2022 . Whilst the couple were stationed at the Smithsonian's Brukkaros Solar Observatory in Namibia, Sordahl collected many specimen's for the museum's natural science collections, including the holotype for a species of canary, '' Serinus albogularis sordahlae''. The species was subsequently named after her. As an eponym, she was honoured since she "maintained her interest ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arthur Bleksley
Arthur Edward Herbert Bleksley (1908, Matatiele – 1984) was a South African Professor of Applied Mathematics and an astronomer. Bleksley's early research involved the astrophysics and astronomy of variable stars. He encouraged science awareness in South Africa by publishing articles about science, by being on a popular radio show, and through his presentations at the Johannesburg Planetarium. Education and career Bleksley was born in the Eastern Cape and attended the Outeniqua High School in George. After matriculation he studied at Stellenbosch University and graduated ''cum laude'' in 1927 and went on to obtain his M.Sc. in 1929, winning the Van der Horst Prize. In 1930 he joined the Solar Research Station run by the National Geographic Society and the Smithsonian Institution at Brukkaros, the caldera of an extinct volcano in South West Africa (Namibia). American researcher William H. Hoover and his colleague Frederick Atwood Greeley, ran an observatory on the mountain ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Solar Radiation
Solar irradiance is the power per unit area (surface power density) received from the Sun in the form of electromagnetic radiation in the wavelength range of the measuring instrument. Solar irradiance is measured in watts per square metre (W/m2) in SI units. Solar irradiance is often integrated over a given time period in order to report the radiant energy emitted into the surrounding environment (joule per square metre, J/m2) during that time period. This integrated solar irradiance is called solar irradiation, solar exposure, solar insolation, or insolation. Irradiance may be measured in space or at the Earth's surface after atmospheric absorption and scattering. Irradiance in space is a function of distance from the Sun, the solar cycle, and cross-cycle changes.Michael Boxwell, ''Solar Electricity Handbook: A Simple, Practical Guide to Solar Energy'' (2012), p. 41–42. Irradiance on the Earth's surface additionally depends on the tilt of the measuring surface, the height ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Brukkaros Solar Observatory
The Brukkaros Solar Observatory was a solar observatory installed on Brukkaros Mountain in the ǁKaras Region of Namibia. It was financed and operated by a cooperation of the American National Geographic Society and the Smithsonian Institution, and it was operational between 1926 and 1931. Installation In 1926 the National Geographic Society, in cooperation with the Smithsonian Institution, financed an expedition to South-West Africa (now Namibia) to measure the intensity of solar radiation. The project was managed by the Smithsonian Astrophysical Observatory, which from 1906 to 1944 was directed by Dr Charles Greeley Abbot. During these years the observatory was dedicated mainly to the study of possible variations in the solar constant and the effects of such variations on the weather. For this purpose solar observatories had been established in Chile and Arizona. To check and confirm the small variations in the solar constant found at these two sites, Abbot received a grant from ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Smithsonian Institution
The Smithsonian Institution ( ), or simply the Smithsonian, is a group of museums and education and research centers, the largest such complex in the world, created by the U.S. government "for the increase and diffusion of knowledge". Founded on August 10, 1846, it operates as a trust instrumentality and is not formally a part of any of the three branches of the federal government. The institution is named after its founding donor, British scientist James Smithson. It was originally organized as the United States National Museum, but that name ceased to exist administratively in 1967. Called "the nation's attic" for its eclectic holdings of 154 million items, the institution's 19 museums, 21 libraries, nine research centers, and zoo include historical and architectural landmarks, mostly located in the District of Columbia. Additional facilities are located in Maryland, New York, and Virginia. More than 200 institutions and museums in 45 states,States without Smithsonian ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
National Geographic Society
The National Geographic Society (NGS), headquartered in Washington, D.C., United States, is one of the largest non-profit scientific and educational organizations in the world. Founded in 1888, its interests include geography, archaeology, and natural science, the promotion of environmental and historical conservation, and the study of world culture and history. The National Geographic Society's logo is a yellow portrait frame—rectangular in shape—which appears on the margins surrounding the front covers of its magazines and as its television channel logo. Through National Geographic Partners (a joint venture with The Walt Disney Company), the Society operates the magazine, TV channels, a website, worldwide events, and other media operations. Overview The National Geographic Society was founded on 13 January 1888 "to increase and diffuse geographic knowledge". It is governed by a board of trustees whose 33 members include distinguished educators, business executives, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
German South West Africa
German South West Africa (german: Deutsch-Südwestafrika) was a colony of the German Empire from 1884 until 1915, though Germany did not officially recognise its loss of this territory until the 1919 Treaty of Versailles. With a total area of 835,100 km², it was one and a half times the size of the mainland German Empire in Europe at the time. The colony had a population of around 2,600 Germans. German rule over this territory was punctuated by numerous rebellions by its native African peoples, which culminated in a campaign of German reprisals from 1904 to 1908 known as the Herero and Namaqua genocide. In 1915, during World War I, German South West Africa was invaded by the Western Allies in the form of South African and British forces. After the war its administration was taken over by the Union of South Africa (part of the British Empire) and the territory was administered as South West Africa under a League of Nations mandate. It became independent as Namibia on 21 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Heliograph
A heliograph () is a semaphore system that signals by flashes of sunlight (generally using Morse code) reflected by a mirror. The flashes are produced by momentarily pivoting the mirror, or by interrupting the beam with a shutter. The heliograph was a simple but effective instrument for instantaneous optical communication over long distances during the late 19th and early 20th century. Its main uses were military, survey and forest protection work. Heliographs were standard issue in the British and Australian armies until the 1960s, and were used by the Pakistani army as late as 1975. Description There were many heliograph types. Most heliographs were variants of the British Army Mance Mark V version (Fig.1). It used a mirror with a small unsilvered spot in the centre. The sender aligned the heliograph to the target by looking at the reflected target in the mirror and moving their head until the target was hidden by the unsilvered spot. Keeping their head still, they then adj ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
