Results 121 to 130 of about 131,800 (236)

Inventory of water storage types in the Blue Nile and Volta River Basins [PDF]

open access: yes
Water storage / River basins / Reservoirs / Ponds / Tanks / Groundwater / Soil moisture ...
Johnston, Robyn M., McCartney, Matthew
core  

Labour Dynamics, Factor Substitution and Capital Adoption in Sub‐Saharan African Agriculture

open access: yesJournal of Agricultural Economics, Volume 77, Issue 1, Page 183-204, February 2026.
ABSTRACT Ongoing structural transformations in many Sub‐Saharan African (SSA) economies are driving changes in labour inputs and wages, likely influencing smallholder agriculture and the direction of agricultural intensification processes. At the same time, the adoption of capital‐intensive technologies still remains puzzlingly low.
Pranav Patil   +2 more
wiley   +1 more source

Maximum Phenomena on the Electro-analytical Using the Potential-step Volta mmetry

open access: yesNippon kagaku zassi, 1961
通常のポーラログラフィーで極大現象をしめす数種の復極剤について,前報で詳述したポテンシアルステップ電解法による極大電流の抑制効果を実験的に検討した。すなわち,本法による場合には,電極界面の流動現象がほぼ完全に除かれた状態において電流~電圧曲線を求めることができるので,通常のポーラログラフィーにあらわれる極大波がいわゆる渦流効果にのみ由来しているとすれば,本法によって極大電流は除去されると考えられる。実験の結果によれば, 1N 塩化カリウム中のマンガン,亜鉛;1N 硝酸中のタリウム, 鉛;1N アンモニア+塩化アンモニウム中のニッケルなどの通常の極大電流は消去することができる。しかしながら, 1N 塩化カリウム中のタリウムおよび鉛の極大電流は消去されず,むしろ顕著になることがわかった ...
openaire   +2 more sources

"This is Ghanaian territory!" Land conflicts in transnational localities on the Burkina Faso-Ghana border [PDF]

open access: yes, 2006
Traditional land rights in Dagara and Sisala societies in Burkina Faso and Ghana which were stateless in pre-colonial times are closely connected with the concept of earth-shrine parishes under the protection of a local land god and ideally under the ...
Lentz, Carola
core  

Toward eco‐sustainable afforestation in arid lands: key lessons from a 23‐year‐old arboretum of native and non‐native trees in Jordan

open access: yesRestoration Ecology, Volume 34, Issue 2, February 2026.
Abstract Introduction Afforestation is a key restoration strategy for mitigating land degradation and desertification in semiarid regions. However, evaluating the ecological impacts of tree species used for sustainable dryland restoration is crucial. For example, non‐native tree species may become invasive, with negative effects on native understory ...
Mohammad M. Al‐Gharaibeh   +4 more
wiley   +1 more source

Exfoliation of an extruded Mg-4Li-1Ca alloy in presence of glucose and bovine serum albumin

open access: yesnpj Materials Degradation
Exfoliation corrosion (EFC) on extruded Mg-4Li-1Ca alloys as bone implant materials has not been reported. This study aimed to elucidate the degradation mechanism of a corrosion type-exfoliation occurred on an extruded Mg-4Li-1Ca alloy under the ...
Lei Cai   +10 more
doaj   +1 more source

Effect of cooling rate on corrosion resistance and behavior of micro-alloyed cast AZ91-Ca-Y alloy

open access: yesJournal of Magnesium and Alloys
Micro-alloying is an effective approach for improving the corrosion resistance of cast AZ91. However, the effect of micro-alloyed elements on corrosion resistance can be varied depending on the solidification rate influencing the diffusion and ...
Hongxiu Liu   +5 more
doaj   +1 more source

Improved water supply in the Ghanaian Volta Basin: who uses it and who participates in community decision-making? [PDF]

open access: yes
"We examine access to, use of, and participation in decisions on improved water supply in the Volta basin of Ghana, one of the first countries to introduce a community-based approach to rural water supply on a large scale.
Engel, Stefanie   +2 more
core  

Solar photovoltaics: Stand alone applications [PDF]

open access: yes
The Lewis Research Center involvement in space photovoltaic research and development and in using photovoltaics for terrestrial applications is described with emphasis on applications in which the normal source of power may be a diesel generator ...
Deyo, J. N.
core   +1 more source

Within-subjects changes in lipreading and visual enhancement among older adults [PDF]

open access: yes, 2016
After 10-14 years, 14 older adults were retested to assess changes in Vonly ability and VE. Results showed no significant declines, however, strong correlations were found between previous V-only performance and current Vonly performance, as well as ...
Voss, Adam Harrison
core   +1 more source

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