2,547 research outputs found
A worker engagement maturity model for improving wellbeing and social sustainability in construction
Developing worker engagement maturity model for improving occupational safety and health in construction
Impact of a mixed-media digital CDM tool on new graduates’ ability to spot construction hazards
The development of a worker engagement maturity model for the improvement of occupational health and safety in construction
Developing a worker engagement maturity model for improving occupational safety and health (OSH) in construction
Bridge number, Heegaard genus and non-integral Dehn surgery
We show there exists a linear function w: N->N with the following property.
Let K be a hyperbolic knot in a hyperbolic 3-manifold M admitting a
non-longitudinal S^3 surgery. If K is put into thin position with respect to a
strongly irreducible, genus g Heegaard splitting of M then K intersects a thick
level at most 2w(g) times. Typically, this shows that the bridge number of K
with respect to this Heegaard splitting is at most w(g), and the tunnel number
of K is at most w(g) + g-1.Comment: 76 page, 48 figures; referee comments incorporated and typos fixed;
accepted at TAM
The formation of mixed germanium–cobalt carbonyl clusters: an electrospray mass spectrometric study, and the structure of a high-nuclearity [Ge₂Co₁₀(CO)₂₄]²⁻ anion
The reaction of [µ₄-Ge{Co₂(CO)₇}₂] with [Co(CO)₄]⁻ has been monitored by electrospray mass spectrometry to detect the cluster anions generated. Conditions giving known mixed Ge–Co carbonyl clusters were established, and a new high nuclearity cluster anion, [Ge₂Co₁₀(CO)₂₄]²⁻ was detected. Conditions for its formation were optimised and it was subsequently isolated as its [Et₄N]⁺ salt and characterised by single-crystal X-ray crystallography. The Ge₂Co₁₀ cluster core has a novel geometry with the two germanium atoms in semi-encapsulated positions, forming seven formal Ge–Co bonds. There are also eighteen formal Co–Co bonds. Corresponding reactions of [µ₄-Si{Co₂(CO)₇}₂] with [Co(CO)₄]⁻ were also investigated
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