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1
Content available Arbuscular Mycorrhizal Symbiosis in Two Cannabis Varieties (Khardala and Critical) in Morocco
Msairi Soukaina, Rais Chaimae, Maazouzi Soukaina, Artib Mariam, El Gabardi Soumaya, Mouden Najoua, Selmaoui Karima, Benkirane Rachid, Touhami Amina Ouazzani, Douira Allal
Ecological Engineering & Environmental Technology
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2023
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Vol. 24, iss. 5
30--35
EN
The richness of the soil in beneficial and growth-stimulating microorganisms and their symbiotic interactions with plants is a factor to be discovered. This kind of relationships is still poorly studied in cannabis (Cannabis sativa L.). The endomycorrhizal status of cannabis was assessed in two cannabis varieties (Khardala and Critical) cultivated in the Taounate region located in northern Morocco. Soil samples collected from the rhizospheric soil of two cannabis parcels of khardala and critical were studied using the wet sieving method. Rhizospher soil of khardala presents a sporal density of 200 spores/100 g of soil and a combinaison of 12 different AMF species divided morphologically into 6 genera predominated by Glomus and Funneliformis. In the other hand, 243 spores per 100 g of soil were noted in association with critical variety, the endomycorrhizal fungi community was represented by 15 species of 6 genera predominated by Glomus. Contrary to expectations, cannabis is found to be mycorrhized, this symbiotic association can be exploited in the soon future to develop profitability and cope with different types of stress.
2
Content available Proposal of a R&D frame to develop resilience models for services supply continuity in view of crisis situations
Eid M., Elhami A., Sousa De Cursi S.
Journal of Polish Safety and Reliability Association
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2018
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Vol. 9, No. 3
11--20
EN
The authors propose a frame to develop mathematical models describing the resilience of the service(s) supply processes and the associated critical-infrastructure(s), in crisis situation. The paper is intended to contribute in developing the paradigm of resilience and appropriate metrics. It describes briefly the paradigm of resilience used in some scientific disciplines, especially: the physical-mechanical resilience (material sciences), the ecological resilience and the psychological resilience. Presently, the use of resilience is very loos, especially, in analysing vital service supply continuity and in crisis management, as far as we are concerned. An advanced resilience concept should encompass: temporality, stochasticity and measurability. The authors propose an R&D frame to develop such formal models in order to help in resilience analysis and decision making for crisis management. Formal models are necessary to rationalise analyses, normalise best practices and build decision making processes. The proposed R&D frame integrates: vulnerability and dependency/interdependency.
3
Content available Analysis of Stress and Strain Fields in and around Inclusions of Various Shapes in a Cylindrical Specimen Loaded in Tension
Neimitz A., Janus U.
Archives of Metallurgy and Materials
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2016
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Vol. 61, iss. 2A
569--576
EN
A numerical analysis is performed of the stress field in and around inclusions of various shapes. Inclusions both stiffer and more compliant than the metal matrix are analysed. The critical stresses required for inclusion fracture are estimated after observation of cavities and inclusions by scanning electron microscopy. Real inclusions were observed after performing uniaxial loading to different amounts of overall strain. The material tested was Hardox-400 steel.
4
Content available remote Praktyczne poblemy projektowania aplikacji wielowątkowych w standardzie POSIX
Stabrowski Marek
Zeszyty Naukowe WSEI. Seria Transport i Informatyka
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2013
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T. 3, nr 1
13--22
PL
W artykule przedstawiono krótko podstawowe koncepcje tworzenia aplikacji wielowątkowych w standardzie POSIX. Przedstawiono dwa praktyczne przykłady aplikacji z sekcjami krytycznymi i problemy poprawnego przetwarzania takich sekcji. Przyspieszenie wynikające z dekompozycji na wiele wątków zilustrowano przykładem mnożenia macierzy.
EN
This paper describes concisely basic methods and concepts of building multithreaded applications using POSIX standard. Two practical application examples with critical sections are presented. Correct handling of critical sections is analyzed and described. Acceleration due to multithreading is illustrated with the example of matrix multiplication.
5
Content available Time-dependant modelling of systems: some open questions
Eid M.
Journal of Polish Safety and Reliability Association
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2011
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Vol. 2, No. 1
83--94
EN
Time dependent modelling of complex system is one of the important topics in system reliability engineering. Although system complexity is increasing, the existing models are numerically satisfactory. However, some formal development is still lacking in reliability theory. A full system time-dependency modelling and analysis is not possible without some formal answers on critical transitions and related issues. This is still one of the open questions in system reliability theory. Some promising development relative to critical states is given in this paper with an application case.
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