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Natural disasters, PC supply chain and corporate performance
Purpose – This paper provides quantitative evidence of natural disasters’ effect on corporate performance and studies the mechanisms through which the supply chain
moderates and mediates the link.
Design/methodology/approach – Using two major natural disasters as quasiexperiment, namely the 2011 Japanese earthquake-tsunami (JET) and Thai flood (TF),
and data over the period 2010Q1-2013Q4, effect of these events on end assemblers’ performance is studied, with a focus on the personal computer (PC) supply chain. The
moderating influence of delivery and sourcing – as supply chain flexibility and agility – are examined through end assemblers’ and suppliers’ inventory. The suppliers’
mediating role is captured as disruption in obtaining PC components through their sales.
Findings – Only JET had any negative effect, further quantified as short-term and long-term. The TF instead portrays an insignificant but positive aftermath, which is
construed as showing learning from experience and adaptability following JET. Inventory matters, but differently for the two events, and suppliers only exhibit a
moderating influence on the assemblers’ disaster-performance link.
Originality/value – Natural disasters, as catastrophic vulnerabilities, are distinct from other vulnerabilities in that they are hard to predict and have significant impact. Since little is known about the impact of natural disasters on firm performance and how supply chain mechanisms moderate or mediate their impact, they should be distinctly modelled and empirically studied from other vulnerabilities. This paper sheds light on supply chain resilience to such events with the role of dynamic capabilities
Interfacial thermal conductance in graphene/black phosphorus heterogeneous structures
Graphene, as a passivation layer, can be used to protect the black phosphorus
from the chemical reaction with surrounding oxygen and water. However, black
phosphorus and graphene heterostructures have low efficiency of heat
dissipation due to its intrinsic high thermal resistance at the interfaces. The
accumulated energy from Joule heat has to be removed efficiently to avoid the
malfunction of the devices. Therefore, it is of significance to investigate the
interfacial thermal dissipation properties and manipulate the properties by
interfacial engineering on demand. In this work, the interfacial thermal
conductance between few-layer black phosphorus and graphene is studied
extensively using molecular dynamics simulations. Two critical parameters, the
critical power Pcr to maintain thermal stability and the maximum heat power
density Pmax with which the system can be loaded, are identified. Our results
show that interfacial thermal conductance can be effectively tuned in a wide
range with external strains and interracial defects. The compressive strain can
enhance the interfacial thermal conductance by one order of magnitude, while
interface defects give a two-fold increase. These findings could provide
guidelines in heat dissipation and interfacial engineering for thermal
conductance manipulation of black phosphorus-graphene heterostructure-based
devices.Comment: 33 pages, 22 figure
Strength and Stability Analysis of a Single Walled Black Phosphorus Tube under Axial Compression
Few-layered black phosphorus materials recently attract much attention due to
its special electronic properties. As a Consequence, the nano-tube from a
single-layer black phosphorus has been theoretically built. The corresponding
electronic properties of such black phosphorus nano-tube were also evaluated
numerically.Comment: 12 pages,8 figures, and 33 reference
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