Results 11 to 20 of about 15,256 (282)

Innovation et action collective : le semis direct des cultures pluviales au Moyen Sébou (Maroc) [PDF]

, 2015
Les exploitations familiales des pays du Sud, au foncier cultivable souvent limité, doivent pouvoir entretenir la fertilité de leurs terres si elles veulent améliorer leur productivité. L'agriculture de conservation et le semis direct sans travail du sol
Dugué, Patrick, Kemoun, Hassane, Labbaci, Taha, Rollin, Dominique   +3 more
core   +2 more sources

Direct sums of semi-projective modules

Colloquium Mathematicum, 2012
We investigate when the direct sum of semi-projective modules is semi-projective. It is proved that if R is a right Ore domain with right quotient division ring Q not equal R and X is a free right R-module then the right R-module Q circle plus X is semi-projective if and only if there does not exist an R-epimorphism from X to ...
Tutuncu, Derya Keskin, Kalebogaz, Berke, Smith, Patrick F.   +2 more
openaire   +2 more sources

NONUNIVERSALITY IN SEMI-DIRECTED BARABÁSI–ALBERT NETWORKS [PDF]

International Journal of Modern Physics C, 2012
In usual scale-free networks of Barabási–Albert type, a newly added node selects randomly m neighbors from the already existing network nodes, proportionally to the number of links these had before. Then the number n(k) of nodes with k links each decays as 1/kγ where γ = 3 is universal, i.e. independent of m.
Sumour, M. A., Radwan, M. A.
openaire   +2 more sources

SEMI-DIRECT PRODUCTS AND BOL LOOP

Demonstratio Mathematica, 1994
The authors first discuss under what circumstances semi-direct products of loops can be formed and then show exactly when a loop is a semi-direct product of a pair of subloops. It turns out that some ad hoc constructions in the literature are in reality semi-direct products.
Goodaire, Edgar G., Robinson, D. A.
openaire   +1 more source

Evaluation des coûts-bénéfices du semis direct des céréales et modélisation économétrique des déterminants de son adoption dans le Saïs et la Chaouia

Revue Marocaine des Sciences Agronomiques et Vétérinaires
Cette étude, menée en collaboration avec l’initiative UM6P–Al Moutmir (OCP-Group), a évalué les performances économiques et agronomiques du semis direct comparé au semis conventionnel pour les principales cultures céréalières (blé tendre, blé dur, orge)
Kaoutar AIT HAMMADI, Driss SQALLI ADOUI, Abdellah ABOUDRARE, Abdellah HAMMA, Abdelaziz EL ABADI   +4 more
doaj   +1 more source

La diffusion du semis direct au Brésil, diversité des pratiques et logiques territoriales : l’exemple de la région d’Itaipu au Paraná

Confins, 2011
No-till or direct seeding is a production system based on non-ploughing. It incorporates a range of farming practices that protect agricultural soils from erosion, reduce fuel consumption and could increase crop yields.
François Laurent, Guillaume Leturcq, Ivo Mello, Jeannine Corbonnois, Roberto Verdum   +4 more
doaj   +1 more source

Lagrangian Mechanics on Centered Semi-direct Products [PDF]

, 2015
There exists two types of semi-direct products between a Lie group $G$ and a vector space $V$. The left semi-direct product, $G \ltimes V$, can be constructed when $G$ is equipped with a left action on $V$. Similarly, the right semi-direct product, $G \rtimes V$, can be constructed when $G$ is equipped with a right action on $V$. In this paper, we will
Colombo, Leonardo J., Jacobs, Henry O.
openaire   +2 more sources

Un semoir de semis direct sous couvert vegetal à traction animale adapté aux conditions du Sénégal [PDF]

, 2018
En Afrique de l'Ouest, la conception et l'adaptation locales de semoirs de semis direct de traction animale faciles d'utilisation et accessibles aux petits producteurs sont un des éléments favorables à l'adoption du semis direct sous couvert végétal ...
Diakhaté, Demba, Fall, Alioune, Havard, Michel, Ralisch, Ricardo, Sarr, I.   +4 more
core  

Loosely-Coupled Semi-Direct Monocular SLAM [PDF]

IEEE Robotics and Automation Letters, 2019
We propose a novel semi-direct approach for monocular simultaneous localization and mapping (SLAM) that combines the complementary strengths of direct and feature-based methods. The proposed pipeline loosely couples direct odometry and feature-based SLAM to perform three levels of parallel optimizations: (1) photometric bundle adjustment (BA) that ...
Seong Hun Lee, Javier Civera
openaire   +4 more sources

Reciprocal control of viral infection and phosphoinositide dynamics

FEBS Letters, EarlyView.
Phosphoinositides, although scarce, regulate key cellular processes, including membrane dynamics and signaling. Viruses exploit these lipids to support their entry, replication, assembly, and egress. The central role of phosphoinositides in infection highlights phosphoinositide metabolism as a promising antiviral target.
Marie Déborah Bancilhon, Bruno Mesmin
wiley   +1 more source