Results 71 to 80 of about 26,806 (291)
Generating Helical Polymorphic Beams Using Dielectric Metasurfaces
Laser &Photonics Reviews, EarlyView.Helix‐shaped polymorphic beams are optical fields whose intensity maxima spiral around the propagation axis, enabling particle manipulation through attractive or repulsive forces. Traditionally requiring expensive spatial light modulators, metasurfaces now provide a compact, cost‐effective alternative. This work demonstrates general helical polymorphic
Maryam Setareh +3 more
wiley +1 more source
, 1979 "Rome 475 C tractor located at Plant 2." Three-quarter view of tractor parked on cement slab in front of a building. The Rome tractors were never brought to Nebraska for testing.
Nebraska Tractor Test Laboratory
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People and Nature, EarlyView.Abstract Forest Landscape Restoration (FLR) is increasingly recognized as a key strategy to address land degradation, biodiversity loss and climate change. However, its long‐term success depends not only on ecological outcomes but also on social processes that shape restoration implementation and sustainability.
Hamza Moluh Njoya +6 more
wiley +1 more source
A Cinderella Story: The Early Evolution of the American Tractor Industry [PDF]
The arrival of motorization, from before the beginning of the twentieth century, has changed agricultural production and the whole economy by dramatically reducing work force and improving productivity.
Soumodip Sarkar, Vanessa Duarte
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Responsible agrivoltaics in temperate Europe: Making systems work for plants, people, and climate
PLANTS, PEOPLE, PLANET, EarlyView.Conceptual framework illustrating the three conditions for responsible AV in temperate regions: sustained plant productivity across rotations, preservation of soil and hydrological integrity, and social license for landscape integration. Multi‐site European evidence highlights how design choices shape trade‐offs among these dimensions.
Maryam Rahimi Jahangirlou +13 more
wiley +1 more source
Symmetry, Integrability and Geometry: Methods and ApplicationsThis article contributes to the relative BGG-machinery for parabolic geometries. Starting from a relative tractor bundle, this machinery constructs a sequence of differential operators that are naturally associated to the geometry in question. In many situations of interest, it is known that this sequence provides a resolution of a sheaf that can ...
Čap, Andreas +2 more
openaire +5 more sources
USE OF ALTERNATIVE DEPRECIATION METHODS TO ESTIMATE FARM TRACTOR VALUES [PDF]
Six depreciation methods were used to simulate the value of farm tractors with indexed and expected prices. Accuracy of simulated values was evaluated using paired t-tests of mean absolute percentage errors and forecast accuracy regression models ...
Burton, Robert O., Jr. +2 more
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PLANTS, PEOPLE, PLANET, EarlyView.Agriculture faces significant challenges under climate change, including rising atmospheric CO2 concentrations and increasingly frequent water limitation, which threaten food security and ecosystem health. Our study included collaborations with local farmers and highlights how arbuscular mycorrhizal (AM) fungi, key plant symbionts, respond differently ...
Meike Katharina Heuck +4 more
wiley +1 more source
Tractors` Injection Systems Overwiev
, 2009 The object of the bachelor’s thesis is to create an overview of injection systems at currently produced tractors. The first part of the overview is concerned with conceptions of diesel injection by tractors’ engines and with a description of its parts ...
Poláček, Milan
core +1 more source