scholarly journals Sedimentary Environment of the Early Pleistocene Gravels of the Edfu formation from the Saqqara Archaeological Site (Egypt) – Preliminary Results

2016 ◽  
Vol 33 (1) ◽  
pp. 69-78 ◽  
Author(s):  
Anna Wysocka ◽  
Fabian Welc ◽  
Urszula Czarniecka
Keyword(s):  
Variable Thickness ◽  
World Wide ◽  
Sedimentary Environment ◽  
Archaeological Site ◽  
Eastern Africa ◽  
Early Pleistocene ◽  
Source Areas ◽  
North Eastern ◽  
Northern Egypt ◽  
The World

AbstractA gravel horizon is preserved in several locations within the world-wide known archaeological site in Saqqara (northern Egypt). It is characterized by a variable thickness, composed of coarse, quartz, quartzitic and flint pebbles, and considered to correspond to gravels of the Edfu Formation, deposited in the Early Pleistocene by the early phase of the Nile development (Protonile Phase). This relatively short (ca. 200 ka) and at the same time very dynamic period of Protonile activity during the Edfu Pluvial is one of the most poorly recognized hydrological-climatic episodes of the Quaternary in north-eastern Africa. This paper is focused on the preliminary sedimentological-petrographic characteristics of these deposits and an attempt to indicate their source areas as well as mechanisms of transportation and deposition in the context of Pleistocene pluvial episodes.

scholarly journals Smallpox: leaving its mark on public health

2019 ◽  
Vol 6 (11) ◽  
pp. 5013
Author(s):  
Corey B. Moore
Keyword(s):  
Public Health ◽  
World Wide ◽  
18Th Century ◽  
Human Migration ◽  
Eastern Africa ◽  
Human Pathogens ◽  
Population Densities ◽  
North Eastern ◽  
The World ◽  
Common Era

Smallpox was one of the most lethal human pathogens in history. It originated around 10,000 years before common era (BCE) in North-eastern Africa, and spread world-wide through human migration and increasing population densities with periodic epidemics throughout the world. By the middle of the 18th century, around one million Europeans each year were contracting the disease with approximately one third of adults and 90 percent of infants succumbing to it. The mortality rate in the immune-naïve populations of the Aztecs and the Incas were as high as 90%. Survivors were left with disfiguring scars and one third were blinded. After the bubonic plague, it was the most feared disease. It affected the outcome of many wars, conquests and the development of many civilisations.

Ethiopia, the Sudan, and Egypt: The Nile River Dispute

1997 ◽  
Vol 35 (4) ◽  
pp. 675-694 ◽  
Author(s):  
ASHOK SWAIN
Keyword(s):  
Nile Blue ◽  
River System ◽  
Eastern Africa ◽  
Nile River ◽  
Seasonal Fluctuations ◽  
Blue Nile ◽  
North Eastern ◽  
The World ◽  
White Nile ◽  
International River

The Nile flows for 6,700 kilometres through ten countries in north-eastern Africa – Rwanda, Burundi, Zaïre/Congo, Tanzania, Kenya, Uganda, Eritrea, Ethiopia, the Sudan, and Egypt – before reaching the Mediterranean, and is the longest international river system in the world – see Map 1. Its two main tributaries converge at Khartoum: the White Nile, which originates from Burundi and flows through the Equatorial Lakes, provides a small but steady flow that is fed by the eternal snows of the Ruwenzori (the ‘rain giver’) mountains, while the Blue Nile, which suffers from high seasonal fluctuations, descends from the lofty Ethiopian ‘water tower’ highlands. They provide 86 per cent of the waters of the Nile – Blue Nile 59 per cent, Baro-Akobo (Sobat) 14 per cent, Tekesse (Atbara) 13 per cent – while the contribution from the Equatorial Lakes region is only 14 per cent.

Caryophyllia sarsiae n.sp. and other recent deep-water Caryophyllia (Scleractina) previously referred to little-known fossil species (C. arcuata, C. cylindracea)

1974 ◽  
Vol 54 (4) ◽  
pp. 767-784 ◽  
Author(s):  
H. Zibrowius
Keyword(s):  
Deep Water ◽  
Deep Sea ◽  
World Wide ◽  
Fossil Species ◽  
The North ◽  
North Eastern ◽  
The World ◽  
Deep Water Species ◽  
Different Depths ◽  
Water Species

Three deep-water species of the north-eastern Atlantic have been studied: Caryophyllia abyssorum Duncan, 1873, C. calveri Duncan, 1873, C. sarsiae n.sp. Of these only C. abyssorum has not been found in the Mediterranean. In the north-eastern Atlantic these species appear characteristic of somewhat different depths, but occasionally can be found together. Obtained by early deep-sea expeditions (“Porcupine” cruise of 1870, cruises of Prince Albert I of Monaco), all three species have been previously confused and assigned, chiefly, to the little-known fossil species C. arcuata and C. cylindracea. In order to show the world-wide confusion about C. arcuata, some other records, from Cape Verde Islands to Japan through Antarctica, are quoted.

Rotational Characteristics of the Green Solar Corona: 1947-1991

1994 ◽  
Vol 144 ◽  
pp. 139-141 ◽  
Author(s):  
J. Rybák ◽  
V. Rušin ◽  
M. Rybanský
Keyword(s):  
Solar Corona ◽  
World Wide ◽  
Rotation Period ◽  
Original Data ◽  
Coronal Emission ◽  
Time Intervals ◽  
Data Set ◽  
The World ◽  
Coronal Emission Line ◽  
Homogeneous Data

AbstractFe XIV 530.3 nm coronal emission line observations have been used for the estimation of the green solar corona rotation. A homogeneous data set, created from measurements of the world-wide coronagraphic network, has been examined with a help of correlation analysis to reveal the averaged synodic rotation period as a function of latitude and time over the epoch from 1947 to 1991.The values of the synodic rotation period obtained for this epoch for the whole range of latitudes and a latitude band ±30° are 27.52±0.12 days and 26.95±0.21 days, resp. A differential rotation of green solar corona, with local period maxima around ±60° and minimum of the rotation period at the equator, was confirmed. No clear cyclic variation of the rotation has been found for examinated epoch but some monotonic trends for some time intervals are presented.A detailed investigation of the original data and their correlation functions has shown that an existence of sufficiently reliable tracers is not evident for the whole set of examinated data. This should be taken into account in future more precise estimations of the green corona rotation period.

Dancing Across the World Wide Web: Advocacy in the 21st Century

2009 ◽  
Author(s):  
Blair Williams Cronin ◽  
Ty Tedmon-Jones ◽  
Lora Wilson Mau
Keyword(s):  
World Wide Web ◽  
21St Century ◽  
World Wide ◽  
The World

Biodiesel production from non-edible oils: A review

2020 ◽  
pp. 149-159
Author(s):  
Jatinder Kataria ◽  
Saroj Kumar Mohapatra ◽  
Amit Pal
Keyword(s):  
Environmental Impact ◽  
Energy Demand ◽  
Fossil Fuels ◽  
World Wide ◽  
Edible Oils ◽  
Control Measure ◽  
Biodiesel Production ◽  
Pollution Level ◽  
Animal Fats ◽  
The World

The limited fossil reserves, spiraling price and environmental impact due to usage of fossil fuels leads the world wide researchers’ interest in using alternative renewable and environment safe fuels that can meet the energy demand. Biodiesel is an emerging renewable alternative fuel to conventional diesel which can be produced from both edible and non-edible oils, animal fats, algae etc. The society is in dire need of using renewable fuels as an immediate control measure to mitigate the pollution level. In this work an attempt is made to review the requisite and access the capability of the biodiesel in improving the environmental degradation.

THE EUROPEAN UNION FORUM ON KIDS' SAFETY IN INTERNET SIF 2019

2019 ◽  
pp. 3-6
Author(s):  
D. A. Bogdanova
Keyword(s):  
European Union ◽  
World Wide Web ◽  
World Wide ◽  
The European Union ◽  
Internet Forum ◽  
The World

The article provides an overview of the activities of the European Union Forum on kids' safety in Internet — Safer Internet Forum (SIF) 2019, which was held in Brussels, Belgium, in November 2019. The current Internet risks addressed by the World Wide Web users, especially children, are described.

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