Results 211 to 220 of about 3,694,226 (404)

The role of Mexico in the first oil shortage: 1918-1922, an international perspective [PDF]

open access: yes
In 1921 Mexico produced a quarter of world’s petroleum, making the country the second largest producer in the world, but by 1930 it only accounted for 3 per cent of world’s production.
M. del Mar Rubio Varas
core  

Hyperelastic Starch Hydrogel Configures Edible and Biodegradable All‐Components for Soft Robots

open access: yesAdvanced Science, EarlyView.
Hyperelastic starch hydrogel is tailored via a phase separation strategy of solvent‐antisolvent co‐modulation. The mechanical performance of starch hydrogel is widely tuned with maximum strains: 194.4–361.4%; maximum tensile stresses: 34–192 kPa; and Young's moduli: 36.0–205.8 kPa. Notably, the hydrogel achieves complete soil degradation within 24 days
Siyu Yao   +7 more
wiley   +1 more source

Analysing Alternative Policy Response to High Oil Prices, Using an Energy Integrated CGE Microsimulation Approach for South Africa [PDF]

open access: yes
An energy-focused integrated CGE microsimulation approach is used to assess the implications of differential government policy responses in South Africa, to increases in international oil prices. The first scenario assumes that increases in world oil and
Ismail Fofana   +2 more
core   +1 more source

Top‐Down Fabricated Wood‐Derived Pressure and Strain Sensors: A Review

open access: yesAdvanced Science, EarlyView.
This review focuses on wood‐derived pressure/strain sensors fabricated via top‐down strategies. It analyzes wood's structural composition, examines processing techniques, discusses sensor types and sensing mechanisms, and reviews existing research. The article concludes with future directions for enhancing performance and scalability.
Yi Ren   +8 more
wiley   +1 more source

Some aspects of aircraft jet engine fuels [PDF]

open access: yes
Technologies are reviewed for improving the thermal stability of jet fuels, with reference to the overheating of fuel tanks in supersonic aircraft.
Bekiesinski, R.
core   +1 more source

Edible and Recyclable Gelatin‐Based Electronics for High‐Precision Health and Environmental Monitoring

open access: yesAdvanced Science, EarlyView.
An edible and recyclable composite film composed of gelatin and activated charcoal is presented for multifunctional health and environmental monitoring. The edible films exhibit tuneable mechanical and electrical properties, along with multimodal sensing capabilities for strain, humidity, and temperature. The composite film is degradable and recyclable,
Ming Dong   +6 more
wiley   +1 more source

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