Results 31 to 40 of about 2,581,993 (313)

FUNCTIONS ON GROUPS AND COMPUTATIONAL COMPLEXITY [PDF]

open access: yesInternational Journal of Algebra and Computation, 2004
We give some connections between various functions defined on finitely presented groups (isoperimetric, isodiametric, Todd–Coxeter radius, filling length functions, etc.), and we study the relation between those functions and the computational complexity of the word problem (deterministic time, nondeterministic time, symmetric space). We show that the
openaire   +2 more sources

Fire and Rhizosphere Effects on Bacterial Co-Occurrence Patterns

open access: yesMicroorganisms, 2023
Fires are common in Mediterranean soils and constitute an important driver of their evolution. Although fire effects on vegetation dynamics are widely studied, their influence on the assembly rules of soil prokaryotes in a small-scale environment has ...
Effimia M. Papatheodorou   +2 more
doaj   +1 more source

Symmetry groups of boolean functions

open access: yesEuropean Journal of Combinatorics, 2014
We prove that every abelian permutation group, but known exceptions, is the symmetry group of a boolean function. This solves the problem posed in the book by Clote and Kranakis. In fact, our result is proved for a larger class of groups, namely, for all groups contained in direct sums of regular groups.
Mariusz Grech, Andrzej Kisielewicz 0001
openaire   +3 more sources

Combined Use of Charcoal, Sago Bark Ash, and Urea Mitigate Soil Acidity and Aluminium Toxicity

open access: yesAgronomy, 2021
Highly weathered tropical acidic soils are characterized by low pH, low organic matter, and aluminium and iron toxicity. These factors pose a challenge to achieving sustainable agriculture.
Nur Hidayah Hamidi   +3 more
doaj   +1 more source

Functional groups in ClueGO overview.

open access: yes, 2022
The pie charts present functional groups for analyzed genes, based on GO, KEGG, Reactome and WikiPathways annotation by ClueGO Cytoscape plug-in, then clustered into STRING action enriched (a), combined score (b), database score (c), and textmining (d ...
Simona Alibrandi (12980559)   +7 more
core   +1 more source

Assessment of Earthworm Services on Litter Mineralisation and Nutrient Release in Annual and Perennial Energy Crops (Zea mays vs. Silphium perfoliatum)

open access: yesAgriculture, 2023
Abundant and functionally diverse earthworm communities in perennials deliver ecosystem services like increasing nutrient availability by incorporating organic matter.
Lena Wöhl   +4 more
doaj   +1 more source

Effect of acidic surface functional groups on Cr(VI) removal by activated carbon from aqueous solution

open access: yes, 2010
The activated carbon with high surface area was prepared by KOH activation. It was further modified by H(2)SO(4) and HNO(3) to introduce more surface functional groups.
Chen Yunfa, Zhou Hualei, Chen, YF
core   +1 more source

Amending Potassic Fertilizer with Charcoal and Sago (Metroxylon sagu) Bark Ash to Improve Potassium Availability in a Tropical Acid Soil

open access: yesAgronomy, 2021
In Ultisols and Oxisols, potassium (K) in the soil solution is leached from the rhizosphere before it interacts with soil colloids, or exchanged with other cations at the exchange sites of the soils because of the abundance of kaolinite clay minerals ...
Puvan Paramisparam   +5 more
doaj   +1 more source

Micro-Structured Polydopamine Films via Pulsed Electrochemical Deposition

open access: yesNanomaterials, 2019
Polydopamine (PDA) films are interesting as smart functional materials, and their controlled structured formation plays a significant role in a wide range of applications ranging from cell adhesion to sensing and catalysis.
Jing Lin   +3 more
doaj   +1 more source

Plant Functional Dispersion, Vulnerability and Originality Increase Arthropod Functions from a Protected Mountain Mediterranean Area in Spring

open access: yesPlants, 2023
Plant diversity often contributes to the shape of arthropod communities, which in turn supply important ecosystem services. However, the current biodiversity loss scenario, particularly worrying for arthropods, constitutes a threat for sustainability ...
Bruno Calheiros-Nogueira   +2 more
doaj   +1 more source

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