Results 71 to 80 of about 859 (275)
African Twist of Circular Economy: Insights, Policies and Recommendations
Business Strategy and the Environment, EarlyView.ABSTRACT While the circular economy (CE) has gained traction, this paper argues that mainstream CE approaches risk being misaligned in the African context. Drawing on a mixed‐methods synthesis of empirical studies, policy documents and cross‐country examples, the study shows that Africa's CE transition is fragmented and uneven, leaving the continent at
Michael Odei Erdiaw‐Kwasie +4 more
wiley +1 more source
Hereditarily closure-preserving collections and metrization
, 1975 In this paper we present a generalization of the Nagata-Smirnov metrization theorem. We prove that a regular T 1 {T_1} -space is metrizable if and only if it has a base of open sets which is the union ...
D. Lutzer, D. Burke, R. Engelking
core +1 more source
Chemistry – A European Journal, EarlyView.Ni2 bispincer complexes with an embedded central imido anchor are presented. The bispincer complexes leverage the high basicity of imido ligands to facilitate 1,2 addition of weak B─H and Si─H bonds, resulting in hydrido–amido complexes and resultingly a contortion of a Ni─Ni sigma bond to form an S = 1 species. The 1,2 addition is proposed to serve as
David de los Santos +2 more
wiley +1 more source
Principia: An International Journal of Epistemology, 2009 In order to measure the degree of dissimilarity between elements of a Boolean algebra, the author’s (1984) proposed to use pseudometrics satisfying generalizations of the usual axioms for identity.
David Miller
doaj
Chemistry – A European Journal, EarlyView.At last, the long‐sought bis(2‐adamantyl)magnesium reagent has been prepared in high yield as a stable tetrahydrofuran/dioxane adduct and fully characterized by x‐ray crystallography. This potent nucleophile outperforms the corresponding Grignard in transmetallation and carbonyl addition reactions, opening new avenues in adamantyl organometallic and ...
Matthew V. DaCosta +3 more
wiley +1 more source
What is a non-metrizable analog of metrizable compacta? (Part I)
Topology and its Applications, 2012 This paper gives an answer to the question stated in the title. Metrizable compacta have the best properties from the point of view of general topology. The author introduces two class of compacta, called metrcompacta and weak metrcompacta, which properly contain all metrizable compacta, and proves that several nice theorems holding for metrizable ...
openaire +2 more sources
Concerning Metrization and Separation in Normal, Separable Moore Spaces [PDF]
, 1964 Metrization and separation theory for normal, separable Moore ...
Traylor, D. R.
core
A New Proof of Certain Metrization Theorems
, 1963 A well-known problem in topology is the so-called metrization problem. This consists of asking for the topological conditions that are necessary and sufficient in order to guarantee that a topological space be metrizable.
Marion B. Smith
core +1 more source
Water‐based drilling fluids formulated with mature fine tailings
The Canadian Journal of Chemical Engineering, EarlyView.Abstract Mature fine tailings (MFT) are persistent, highly stable colloidal suspensions generated as byproducts of bitumen extraction from oil sands. Given their environmental risks, identifying viable applications for MFT could reduce their accumulation while offsetting natural resource use.
Haichao Li +2 more
wiley +1 more source
The Structure of Metrizable Graphs
Discrete & Computational GeometryAbstract A consistent path system in a graph G is an intersection-closed collection of paths, with exactly one path between any two vertices in G . We call G
Maria Chudnovsky +2 more
openaire +3 more sources