Results 71 to 80 of about 1,244,399 (202)

Is Cannabis a Stepping Stone for Cocaine? [PDF]

This paper uses a unique dataset collected among inhabitants of Amsterdam, to study the dynamics in the consumption of cannabis and cocaine.If people start using these drugs they are most likely to do so at age 18-20 for cannabis and age 20-25 for ...
Ours, J.C. van
core   +1 more source

Archaeological survey of the Modder River dongas, Free State, South Africa

Southern African Field Archaeology
The semi-arid grasslands of the Free State Province of South Africa have produced the earliest evidence of the presence of Homo sapiens in the subcontinent, together with an extensive Pleistocene palaeoenvironmental record based on fossil assemblages ...
Felipe Cuartero Monteagudo, Maïlys Richard, Lloyd Rossouw, Michael Toffolo   +3 more
doaj   +1 more source

Clusters and cycles in the cosmic ray age distributions of meteorites [PDF]

Statistically significant clusters in the cosmic ray exposure age distributions of some groups of iron and stone meteorites were observed, suggesting epochs of enhanced collision and breakups.
Marti, K., Woodard, M. F.
core   +1 more source

The Jojosi Dongas: An interdisciplinary project to study the evolution of human behaviour and landscapes in open-air contexts

Southern African Field Archaeology
Hunter-gatherer groups conduct most of their activities in open landscapes as they provide drinking water, food, and raw materials, and offer spaces for social gatherings.
Manuel Will, Matthias Blessing, Gunther H.D. Möller, Lawrence Msimanga, Hanna Pehnert, Svenja Riedesel, Greg A. Botha, Christian Sommer   +7 more
doaj   +1 more source

Employment pathways and wage progression for mothers in low-skilled work: evidence from three British datasets [PDF]

, 2011
This CASEbrief reports on the findings of recent research examining the employment pathways followed by mothers entering low-skilled work. The project was originally framed under a Labour Government which placed considerable emphasis on encouraging women
Bastagli, Francesca, Stewart, Kitty
core  

Cannabis Use When it's Legal [PDF]

This paper uses information about prime age individuals living in Amsterdam, to study whether the use of alcohol, or tobacco stimulates the use cannabis, i.e.
Ours, J.C. van
core   +1 more source

Forest floor vegetation in Sweden [PDF]

, 2012
In boreal forests, dwarf-shrubs (Vaccinium spp.) often dominate the forest floor and are key-stone species in ecosystems due to their importance for nutrient cycling and as a major food source for herbivores. Forestry affects the vegetation both directly
Hedvall, Pär-Ola
core  

The Mehlman archives and the archaeology of Nasera rockshelter, Tanzania

Afriques
Archives are increasingly recognized as a critical element in archaeological research in eastern Africa and elsewhere that, unlike excavation, are a non-destructive source of information.
Christian A. Tryon, Hope Romain, Kathryn Ranhorn   +2 more
doaj   +1 more source

Stone Age Economics: The Origins of Agriculture and the Emergence of Non-Food Specialists. [PDF]

This paper examines the prehistoric shift from hunting and gathering to agriculture. Among hunters and gatherers, all community members were engaged in food provision. Agricultural societies, in contrast, avail themselves of non-food specialists.
Jacob L. Weisdorf
core  

PEDIATRIC URINARY STONE PROFILE IN SAIFUL ANWAR HOSPITAL

Jurnal Urologi Indonesia
Objective: This study aims to provide an overview of the characteristics of age, gender, stone location, stone side, stone analysis, and management of pediatric urinary stone in the tertiary hospital.
Muhammad Firas Balafif, Besut Daryanto, Pradana Nurhadi   +2 more
doaj   +1 more source