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"Pyramids."
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Mysteries of the Egyptian pyramids
Introduces readers to the myths, science, and technology surrounding the creation and exploration of the Egyptian pyramids.
Book
Fetal renal changes evaluation in pregnant women with fetal growth restriction
Background:Fetal kidneys appear as hypoechogenic, oval structures in the posterior midabdomen. As the kidney matures, the pelvicalyceal system becomes more apparent, and pyramids and a distinct capsule subsequently become apparent. The fetal kidneys become well developed at the 13thweek of gestation
Journal Article
Egyptian pyramids
\"Describes the pyramids of ancient Egypt, one of the ancient wonders of the world, including how and why they were built, the pharaohs who were buried inside, and what the ruins are like today\"--Provided by publisher.
Book
Assessment of the Geotouristic Values of Devil's Town, Serbia
Serbia is a country rich in geoheritage with eighty geomorphological sites now under protection. Although a canyon, the site of Devil’s Town is a unique geomorphological site in Serbia and deserves special attention. The geotouristic values of Devil's Town were assessed based on the analysis of its present state and comparison with three similar and nearby geosites on the Balkan Pennisula (the Sand Pyramids in Bosnia and Herzegovina and the Stob and Melnik Earth pyramids in Bulgaria). The assessment was performed using a ‘modified geosite assessment model’ (M-GAM), which includes estimation of the main indicators and sub-indicators. Devil's Town has an average level of major and additional values. Indicators show that this geosite has great tourist, scientific and aesthetic value, as well as enough space for improving the ecological and functional values, as a basis for the development of tourism. Devil's Town displays a higher touristic value than the Sand pyramids and slightly lower than the Stob pyramids. However, in comparison with the Melnik Earth pyramids in Bulgaria, its touristic value is significantly lower. This study could serve as a guide for managing development strategies concerning decision-making and engagement in tourism of the analysed geosite, addressing the needs of modern tourists.
Journal Article
The complete pyramids
Discusses the origin and development of the Egyptian pyramids, describes their role in Egyptian religion and culture, profiles pyramid explorers, and explains how they were built.
Book
Catalonia's Human Towers
The building of human towers (
castells ) is a centuries-old
traditional sport where hundreds of men, women, and children gather
in Catalan squares to create breathtaking edifices through a feat
of collective athleticism. The result is a great spectacle of
effort and overcoming, tension and release.
Catalonia's Human Towers is an ethnographic look at the
thriving castells practice-a symbol of Catalan cultural heritage
and identity amid debates around national autonomy and secession
from Spain. While the main function of building castells is to grow
community through a low-cost, intergenerational, and inclusive
leisure activity, Mariann Vaczi reveals how this unique sport also
provides a social base, image, and vocabulary for the independence
movement.
Highlighting the intersection of folklore, performance, and
sport, Catalonia's Human Towers captures the subtle
processes by which the body becomes politicized and ideology
becomes embodied, with all the desires, risks and precarities of
collective constructions.
eBook
Pyramids of Egypt
\"Carefully leveled text and vibrant photographs introduce early readers to the science and engineering behind the Pyramids of Egypt. Includes infographics, an activity, glossary, and index\"-- Provided by publisher.
Book
Iontronic pressure sensor with high sensitivity over ultra-broad linear range enabled by laser-induced gradient micro-pyramids
Despite the extensive developments of flexible capacitive pressure sensors, it is still elusive to simultaneously achieve excellent linearity over a broad pressure range, high sensitivity, and ultrahigh pressure resolution under large pressure preloads. Here, we present a programmable fabrication method for microstructures to integrate an ultrathin ionic layer. The resulting optimized sensor exhibits a sensitivity of 33.7 kPa
−1
over a linear range of 1700 kPa, a detection limit of 0.36 Pa, and a pressure resolution of 0.00725% under the pressure of 2000 kPa. Taken together with rapid response/recovery and excellent repeatability, the sensor is applied to subtle pulse detection, interactive robotic hand, and ultrahigh-resolution smart weight scale/chair. The proposed fabrication approaches and design toolkit from this work can also be leveraged to easily tune the pressure sensor performance for varying target applications and open up opportunities to create other iontronic sensors.
Developing iontronic pressure sensors with high sensitivity in a wide linear range can be challenging due to a trade-off between sensitivity and linear range. Here, authors bypass this limitation by using laser-assisted gradient micro-pyramids and insights from multiphysics simulations.
Journal Article
Discovery of a big void in Khufu’s Pyramid by observation of cosmic-ray muons
Cosmic-ray muon radiography has been used to non-invasively visualize the voids in the Great Pyramid (Khufu’s Pyramid), revealing a large void situated above the Grand Gallery.
Cosmic discovery at Giza
The Great Pyramid of Giza holds many secrets. There is no consensus on how it was built and most of its internal structure, besides three chambers, is not known. Kunihiro Morishima and colleagues used cosmic-ray muons, which are weakly deflected and absorbed by stone, as a natural imaging probe to investigate the possibility of hidden chambers. They installed a muon detector—a nuclear emulsion film—in one of the chambers and collected data over several months. They observed a clear increase in the flux of muons for specific positions above the known chambers, which indicates the presence of a previously unknown void. The findings are supported by data from two other detection techniques. This is the first major inner structure found in the Great Pyramid since the 19th century.
The Great Pyramid, or Khufu’s Pyramid, was built on the Giza plateau in Egypt during the fourth dynasty by the pharaoh Khufu (Cheops)
1
, who reigned from 2509
bc
to 2483
bc
. Despite being one of the oldest and largest monuments on Earth, there is no consensus about how it was built
2
,
3
. To understand its internal structure better, we imaged the pyramid using muons, which are by-products of cosmic rays that are only partially absorbed by stone
4
,
5
,
6
. The resulting cosmic-ray muon radiography allows us to visualize the known and any unknown voids in the pyramid in a non-invasive way. Here we report the discovery of a large void (with a cross-section similar to that of the Grand Gallery and a minimum length of 30 metres) situated above the Grand Gallery. This constitutes the first major inner structure found in the Great Pyramid since the nineteenth century
1
. The void, named ScanPyramids’ Big Void, was first observed with nuclear emulsion films
7
,
8
,
9
installed in the Queen’s chamber, then confirmed with scintillator hodoscopes
10
,
11
set up in the same chamber and finally re-confirmed with gas detectors
12
outside the pyramid. This large void has therefore been detected with high confidence by three different muon detection technologies and three independent analyses. These results constitute a breakthrough for the understanding of the internal structure of Khufu’s Pyramid. Although there is currently no information about the intended purpose of this void, these findings show how modern particle physics can shed new light on the world’s archaeological heritage.
Journal Article