XTerraSpace: сентября 2017

суббота, 30 сентября 2017 г.

Под Железногорском археологи обнаружили древнее поселение...

Под Железногорском археологи обнаружили древнее поселение славян
Еще весной ученые НИИ археологии юго-востока Руси провели разведывательные работы на территории Михайловского ГОКа. Полученные тогда данные оказались настолько интересными, что было решено отправить экспедицию для изучения самого северного поселения на территории Курской области.
Местность, расположенная в паре километров от карьера МГОКа, ранее не использовалась предприятием. И когда решили расширять территорию, то пригласили археологов проверить место. «Только не стоит говорить, что результаты уникальные или сенсационные, – замечает директор НИИ археологии юго-востока Руси КГУ Владимир Енуков. – Скажем так, мы получили прекрасный археологический материал, который поможет в изучении прошлого нашего края».
К активным работам на так называемом Курбакином поселении ученые приступили в сентябре. «Сейчас идет завершающий этап, – поясняет Владимир Васильевич. – Нами были обследованы 2500 квадратных метров. По предварительным оценкам, во второй половине IV – первой половине V веков, в период Киевской культуры, здесь жила большая семейная община».
Об этом говорят найденные следы двух домов, многочисленных хозяйственных построек и зерновых ям. «Предметные находки довольно любопытные, – продолжает Владимир Васильевич. – Это остатки серебряных и медных браслетов, застежек, бусины, предположительно, импортного производства. Также нашли серебряную лунницу – женское статусное украшение в виде сильно загнутого полумесяца. Еще обнаружили часть бронзовой фибулы, которая, скорее всего, была украшена эмалью. Дело в том, что с III века существовал ремесленный центр, который и делал интересные вещицы с красной или синей эмалью. И обломок подобного произведения нам встретился.
Также во время раскопок были обнаружены литейные формы, что говорит о занятии ювелирным делом, костяные и глиняные остатки частей ткацкого и прядильного станков, многочисленные черепки местной керамики». С раскопа археологи взяли образцы почвы. Исследовав их, можно будет сделать выводы о том, какие сельскохозяйственные культуры выращивали наши далекие предки.
По мнению ученых, поселение на этом месте просуществовало недолго. А так как не обнаружено следов разрушения или пожара, то, скорее всего, в какой-то момент люди собрали вещи и ушли с этой территории.
Оригинал материала
“Друг для друга-Курск” http://www.dddkursk.ru/

Glass octagonal bottle, Greek and Roman ArtMedium: GlassMuseum…

Glass octagonal bottle, Greek and Roman Art

Medium: Glass

Museum Accession

Metropolitan Museum of Art, New York, NY

http://www.metmuseum.org/art/collection/search/256734

Relief, Arts of Africa, Oceania, and the AmericasMedium:…

Relief, Arts of Africa, Oceania, and the Americas

Medium: Stone

Museum Purchase, 1900

Metropolitan Museum of Art, New York, NY

http://www.metmuseum.org/art/collection/search/307638

met-musical-instruments: Upright (Giraffe) Piano, Musical…

met-musical-instruments:

Upright (Giraffe) Piano, Musical Instruments

Medium: Rosewood, cloth, ivory, felt

The Crosby Brown Collection of Musical Instruments, 1889

Metropolitan Museum of Art, New York, NY

http://www.metmuseum.org/art/collection/search/505723

Queen Mother Pendant Mask: Iyoba

Halberd-Spontoon, Arms and ArmorMedium: Steel, wood (ash),…

Halberd-Spontoon, Arms and Armor

Medium: Steel, wood (ash), gold

Gift of William H. Riggs, 1913

Metropolitan Museum of Art, New York, NY

http://www.metmuseum.org/art/collection/search/26712

Armor, Arms and ArmorMedium: Steel, copper alloy, textile,…

Armor, Arms and Armor

Medium: Steel, copper alloy, textile, metallic thread

Bequest of George C. Stone, 1935

Metropolitan Museum of Art, New York, NY

http://www.metmuseum.org/art/collection/search/32076

met-medieval-art: Textile with Foliated Scroll and Pomegranate…

met-medieval-art:

Textile with Foliated Scroll and Pomegranate Motives, Medieval Art

Medium: Velvet

Rogers Fund, 1917

Metropolitan Museum of Art, New York, NY

http://www.metmuseum.org/art/collection/search/465903

met-robert-lehman: Cattle in a Landscape by Giovanni Domenico…

met-robert-lehman:

Cattle in a Landscape by Giovanni Domenico Tiepolo, Robert Lehman Collection

Medium: Pen and brown ink, brown wash, over black chalk

Robert Lehman Collection, 1975

Metropolitan Museum of Art, New York, NY

http://www.metmuseum.org/art/collection/search/459767

Inscribed brick, Ancient Near Eastern ArtMedium: Ceramic,…

Inscribed brick, Ancient Near Eastern Art

Medium: Ceramic, glaze

Rogers Fund, 1959

Metropolitan Museum of Art, New York, NY

http://www.metmuseum.org/art/collection/search/324915

met-medieval-art: Gold Belt Mount with Loop, Medieval…

met-medieval-art:

Gold Belt Mount with Loop, Medieval Art

Medium: Gold

Gift of J. Pierpont Morgan, 1917

Metropolitan Museum of Art, New York, NY

http://www.metmuseum.org/art/collection/search/464102

Потрясающий шкваловый ворот над Утрехтом, Нидерланды. 29...

Потрясающий шкваловый ворот над Утрехтом, Нидерланды.
29 сентября 2017.

©Michiel Baatsen

Северное сияние в Уэстлок, провинция Альберта, Канада. 28...

Северное сияние в Уэстлок, провинция Альберта, Канада. 28 сентября 2017.
by Jeff Wallace

Atomistic simulations go the distance on metal…

Atomistic simulations go the distance on metal strength

Lawrence Livermore National Laboratory researchers have dived down to the atomic scale to resolve every “jiggle and wiggle” of atomic motion that underlies metal strength.

In a first of its kind series of computer simulations focused on metal tantalum, the team predicted that, on reaching certain critical conditions of straining, metal plasticity (the ability to change shape under load) meets its limits. One limit is reached when crystal defects known as dislocations are no longer able to relieve mechanical loads, and another mechanism – twinning, or the sudden reorientation of the crystal lattice – is activated and takes over as the dominant mode of dynamic response.

The research appears in the Sept. 27 edition of Nature as an Advance Online Publication.

Strength and plasticity properties of a metal are defined by dislocations, line defects in the crystal lattice whose motion causes material slippage along crystal planes. The theory of crystal dislocation was first advanced in the 1930s, and much research since then has focused on dislocation interactions and their role in metal hardening, in which continued deformation increases the metal’s strength (much like a blacksmith pounding on steel with a hammer). The same simulations strongly suggest that the metal cannot be strengthened forever.

Terracotta lamp mold, Greek and Roman ArtMedium: TerracottaThe…

Terracotta lamp mold, Greek and Roman Art

Medium: Terracotta

The Cesnola Collection, Purchased by subscription, 1874–76

Metropolitan Museum of Art, New York, NY

http://www.metmuseum.org/art/collection/search/244746

Curiosity Leaving Tracks in the Martian Sand | Planetary…

Curiosity Leaving Tracks in the Martian Sand | Planetary Landscapes

Credit:

NASA/JPL-CalTech

A short drive of ~5.4 meters Northeast (44º) on Sol 1751 (yesterday), sees the rover reverse away from the sandy ripple it investigated over the weekend and turn back to the path that will lead it to the Vera Rubin Ridge access ramp located to the Southeast of the current location. Two end of drive NavCam images form this simple mosaic that looks back at the tracks made in the sand. For scale each wheel track is 40 centimeters wide.

Водяной смерч в Японском море рядом с городом Дзёэцу...

Водяной смерч в Японском море рядом с городом Дзёэцу (Япония, 30.09.2017)

Водяной смерч на рассвете у побережья Милаццо, Сицилия.Утро...

Водяной смерч на рассвете у побережья Милаццо, Сицилия.
Утро 30 сентября 2017.

Hypostyle Hall of the Temple of Khnum, Esna.

Illustration of Isis, from ‘Monuments of Egypt and Nubia’….

Illustration of Isis, from ‘Monuments of Egypt and Nubia’.
by Ippolito Rosellini (Italian egyptologist, 1800-1843).

Crazy Mountains? The Crazy Mountains, also known as…

Crazy Mountains?

The Crazy Mountains, also known as ‘Awaxaawippia by the Apsaalooka or Crow tribe’ are a relatively small mountain range in Montana. Due to their height (up to 3418m) and dominating location on a plain they appear almost as an a rocky island. Conditions in the Crazy Mountains are more arid than the surroundings and thus the slopes are less forested. On a hike you can spot herds of mountain goats and an occasional wolverine. However, since most of the land is located on private property there are only few access roads and the southern portion of the range has no roads at all.

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Tre Cime di Lavaredo, Dolomites

A post shared by Landscapes Photographer (@massimobarbieri86) on Sep 23, 2017 at 4:39am PDT

Tre Cime di Lavaredo, Dolomites

Geologists determine the breadth and depth of erosion from an…

Geologists determine the breadth and depth of erosion from an ancient tsunami in Northern California http://www.geologypage.com/2017/09/geologists-determine-breadth-depth-erosion-ancient-tsunami-northern-california.html

Потрясающее северное сияние над Норильском, Красноярский...

Потрясающее северное сияние над Норильском, Красноярский край.
Вечер 29 сентября 2017.

Автор: Евгений Стасенко

АРХЕОЛОГИ ОБНАРУЖИЛИ ДРЕВНЕЙШЕЕ В МИРЕ ИЗОБРАЖЕНИЕ...

АРХЕОЛОГИ ОБНАРУЖИЛИ ДРЕВНЕЙШЕЕ В МИРЕ ИЗОБРАЖЕНИЕ ПОСЕЛЕНИЯ. Published: December 2, 2015. Фото: Marcos Garcia-Diez/plos one
В 50 км к западу от Барселоны исследователи нашли наскальный рисунок возрастом 13 800 лет, на котором изображены семь хижин. До сих пор самым старым изображением человеческих жилищ считались рисунки возрастом 5000—6000 лет.
Статья испанских ученых опубликована в журнале Plos One.
Выгравированные хижины, которые относятся к эпохе верхнего палеолита (50—10 тысяч лет назад), были обнаружены во время археологических раскопок в лагере Моли дель Соль. Судя по изображению, хижины в форме пчелиных ульев были сделаны из подручных материалов, травы и животных шкур и опирались на деревянные каркасы.
По предположениям ученых, рисунок жилищ был сделан художником каменного века, которому надоело изображать традиционные для той эпохи сценки охоты людей на животных. Кстати, самым старым рисункам с подобными мотивами около 40 тысяч лет.
Помимо изображений археологи обнаружили и другие доказательства пребывания древних охотников-собирателей в данной местности: угли от костров и кости животных, оставленных после еды.
«Мы уверены, что люди жили здесь между 15 тысячами и 9 тысячами лет назад, — говорит главный автор работы Маркос Гарсиа-Диез. — На протяжении этого времени они изготавливали орудия для труда и охоты, потребляли в пищу мясо убитых животных и, вероятно, спали в тех самых хижинах».
Однако не все убеждены, что на рисунках изображены хижины. Британский ученый Пол Петит считает, что на скале могут быть изображены животные, потому что искусство того времени имело крайне абстрактный характер.
Источники
http://journals.plos.org/
https://chrdk.ru/
08.12.2015

NASA Glenn Tests Thruster Bound for Metal World

NASA – Psyche Mission logo.

September 29, 2017

As NASA looks to explore deeper into our solar system, one of the key areas of interest is studying worlds that can help researchers better understand our solar system and the universe around us. One of the next destinations in this knowledge-gathering campaign is a rare world called Psyche, located in the asteroid belt.

Image above: Artist’s concept of the Psyche spacecraft, which will conduct a direct exploration of an asteroid thought to be a stripped planetary core. Image Credits: SSL/ASU/P. Rubin/NASA/JPL-Caltech.

Psyche is different from millions of other asteroids because it appears to have an exposed nickel-iron surface. Researchers at Arizona State University, Tempe, in partnership with NASA’s Jet Propulsion Laboratory in Pasadena, California, believe the asteroid could actually be the leftover core of an early planet. And, since we can’t directly explore any planet’s core, including our own, Psyche offers a rare look into the violent history of our solar system.

“Psyche is a unique body because it is, by far, the largest metal asteroid out there; it’s about the size of Massachusetts,” said David Oh, the mission’s lead project systems engineer at JPL. “By exploring Psyche, we’ll learn about the formation of the planets, how planetary cores are formed and, just as important, we’ll be exploring a new type of world. We’ve looked at worlds made of rock, ice and of gas, but we’ve never had an opportunity to look at a metal world, so this is brand new exploration in the classic style of NASA.”

But getting to Psyche won’t be easy. It requires a cutting-edge propulsion system with exceptional performance, which is also safe, reliable and cost-effective. That’s why the mission team has turned to NASA Glenn Research Center in Cleveland, which has been advancing solar electric propulsion (SEP) for decades.

SEP thrusters use inert gases, like xenon, which are then energized by the electric power generated from onboard solar arrays to provide gentle, non-stop thrust.

“For deep space missions, the type and amount of fuel required to propel a spacecraft is an important factor for mission planners,” said Carol Tolbert, project manager for Psyche thruster testing at NASA Glenn. “A SEP system, like the one used for this mission, operates more efficiently than a conventional chemical propulsion system, which would be impractical for this type of mission.”

The reduced fuel mass allows the mission to enter orbit around Psyche and provides additional space for all of the mission’s scientific payload. Psyche’s payload includes a multispectral imager, magnetometer, and gamma-ray spectrometer. These instruments will help the science team better understand the asteroid’s origin, composition and history.

Additional benefits of SEP are flexibility and robustness in the flight plan, which allow the spacecraft to arrive at Psyche much faster and more efficiently than it could using conventional propulsion.

For this mission, the spacecraft, which will be built jointly by JPL and Space Systems Loral (SSL), will use the SPT-140 Hall effect thruster. Because Psyche is three times farther away from the Sun than Earth, flying there required a unique test of the low-power operation of the thruster in the very low pressures that will be encountered in space.

The mission team called upon NASA Glenn, and its space power and propulsion expertise, to put the mission’s thruster through its paces at the center’s Electric Propulsion Laboratory.

Preparing our Vacuum Chamber to Test High-Powered Thruster

“This mission will be the first to use a Hall effect thruster system beyond lunar orbit, so the tests here at Glenn, which had never been conducted before, were needed to ensure the thruster could perform and operate as expected in the deep space environment,” said Tolbert.

The facility at NASA Glenn has been a premier destination for electric propulsion and power system testing for over 40 years and features a number of space environment chambers, which simulate the vacuum and temperatures of space.

“This was very important to the mission because we want to test-like-we-fly and fly-like-we-test,” said Oh. “Glenn has a world-class facility that allowed us to go to very low pressures to simulate the environment the spacecraft will operate in and better understand how our thrusters will perform around Psyche.

“At first glance, the results confirm our predictions regarding how the thruster will perform, and it looks like everything is working as expected. But, we will continue to refine our models by doing more analysis.”

As the team works toward an anticipated August 2022 launch, they will use the data collected at NASA Glenn to update their thruster modeling and incorporate it into mission trajectories.

The scientific goals of the Psyche mission are to understand the building blocks of planet formation and explore firsthand a wholly new and unexplored type of world. The mission team seeks to determine whether Psyche is the core of an early planet, how old it is, whether it formed in similar ways to Earth’s core, and what its surface is like. For more information about NASA’s Psyche mission, visit: http://www.nasa.gov/psyche

The Psyche Mission is being completed under NASA’s Science Mission Directorate’s Discovery Program, a series of lower-cost, highly focused robotic space missions that are exploring the solar system.

Image (mentioned), Video, Text, Credits: NASA/Laurie Cantillo/Dwayne Brown/JPL/DC Agle/Glenn Research Center/Jimi Russell.

Greetings, Orbiter.ch

Terracotta bell-krater (bowl for mixing wine and water) by…

Terracotta bell-krater (bowl for mixing wine and water) by Kekrops Painter, Greek and Roman Art

Medium: Terracotta

Fletcher Fund, 1956

Metropolitan Museum of Art, New York, NY

http://www.metmuseum.org/art/collection/search/254907

Banner Probably of Francesco II de’ Medici, 1735, Arms and…

Banner Probably of Francesco II de’ Medici, 1735, Arms and Armor

Medium: Silk

Rogers Fund, 1913

Metropolitan Museum of Art, New York, NY

http://www.metmuseum.org/art/collection/search/22177

Plate Six from Nouveavx Desseins D’Arquebvseries by Gilles…

Plate Six from Nouveavx Desseins D’Arquebvseries by Gilles Demarteau, Arms and Armor

Medium: Engraving

Purchase, Michael H. Pourfar Gift, 2016

Metropolitan Museum of Art, New York, NY

http://www.metmuseum.org/art/collection/search/716772

Gift of F. W. Rhinelander, 1898

Metropolitan Museum of Art, New York, NY

http://www.metmuseum.org/art/collection/search/246742

met-modern-art: Miraculous Landing, or the “112!” by Paul Klee…

met-modern-art:

Miraculous Landing, or the “112!” by Paul Klee by Paul Klee, Modern and Contemporary Art

Medium: Watercolor, transferred printing ink, and ink on paper mounted on cardboard

The Berggruen Klee Collection, 1984

Metropolitan Museum of Art, New York, NY

Metropolitan Museum of Art, New York, NY

http://www.metmuseum.org/art/collection/search/483140

A post shared by Curated by Ryan Rehbock (@thecrowncollection) on Sep 20, 2017 at 11:51am PDT

Carved ammonite

Wall painting from Room F of the Villa of P. Fannius Synistor at…

Wall painting from Room F of the Villa of P. Fannius Synistor at Boscoreale, Greek and Roman Art

Medium: Fresco

Rogers Fund, 1903

Metropolitan Museum of Art, New York, NY

http://www.metmuseum.org/art/collection/search/247014

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суббота, 30 сентября 2017 г.