4,612 research outputs found
Capability Matrix : A Framework for Analyzing Capabilities in Value Chains
This paper develops a Capability Matrix for analyzing capabilities of developing
country firms that participate in global and national value chains. This is a generic
framework to capture firm-level knowledge accumulation in the context of global
and local industrial constellations, by integrating key elements of the global value
chain (GVC) and technological capabilities (TC) approaches. The framework can
visually portray characteristics of firmsâ capabilities, and highlight a relatively
overlooked factor in the GVC approach: local firmsâ endogenous learning efforts in
varieties of relationship with lead firms.Developing Countries, Industrial Management, Business Enterprises, Capability Matrix, Capabilities, Value Chains, Lead Firms, Local Firms
Instrumental Resolution of the Chopper Spectrometer 4SEASONS Evaluated by Monte Carlo Simulation
We performed simulations of the resolution function of the 4SEASONS
spectrometer at J-PARC by using the Monte Carlo simulation package McStas. The
simulations showed reasonably good agreement with analytical calculations of
energy and momentum resolutions by using a simplified description. We
implemented new functionalities in Utsusemi, the standard data analysis tool
used in 4SEASONS, to enable visualization of the simulated resolution function
and predict its shape for specific experimental configurations.Comment: 8 pages, 5 figure
Discriminating different classes of biological networks by analyzing the graphs spectra distribution
The brain's structural and functional systems, protein-protein interaction,
and gene networks are examples of biological systems that share some features
of complex networks, such as highly connected nodes, modularity, and
small-world topology. Recent studies indicate that some pathologies present
topological network alterations relative to norms seen in the general
population. Therefore, methods to discriminate the processes that generate the
different classes of networks (e.g., normal and disease) might be crucial for
the diagnosis, prognosis, and treatment of the disease. It is known that
several topological properties of a network (graph) can be described by the
distribution of the spectrum of its adjacency matrix. Moreover, large networks
generated by the same random process have the same spectrum distribution,
allowing us to use it as a "fingerprint". Based on this relationship, we
introduce and propose the entropy of a graph spectrum to measure the
"uncertainty" of a random graph and the Kullback-Leibler and Jensen-Shannon
divergences between graph spectra to compare networks. We also introduce
general methods for model selection and network model parameter estimation, as
well as a statistical procedure to test the nullity of divergence between two
classes of complex networks. Finally, we demonstrate the usefulness of the
proposed methods by applying them on (1) protein-protein interaction networks
of different species and (2) on networks derived from children diagnosed with
Attention Deficit Hyperactivity Disorder (ADHD) and typically developing
children. We conclude that scale-free networks best describe all the
protein-protein interactions. Also, we show that our proposed measures
succeeded in the identification of topological changes in the network while
other commonly used measures (number of edges, clustering coefficient, average
path length) failed
Capability Matrix : A Framework for Analyzing Capabilities in Value Chains
This paper develops a Capability Matrix for analyzing capabilities of developingcountry firms that participate in global and national value chains. This is a genericframework to capture firm-level knowledge accumulation in the context of globaland local industrial constellations, by integrating key elements of the global valuechain (GVC) and technological capabilities (TC) approaches. The framework canvisually portray characteristics of firmsâ capabilities, and highlight a relativelyoverlooked factor in the GVC approach: local firmsâ endogenous learning efforts invarieties of relationship with lead firms
Direct Observation of Non-Monotonic dx2-y2-Wave Superconducting Gap in Electron-Doped High-Tc Superconductor Pr0.89LaCe0.11CuO4
We performed high-resolution angle-resolved photoemission spectroscopy on
electron-doped high-Tc superconductor Pr0.89LaCe0.11CuO4 to study the
anisotropy of the superconducting gap. The observed momentum dependence is
basically consistent with the dx2-y2-wave symmetry, but obviously deviates from
the monotonic dx2-y2 gap function. The maximum gap is observed not at the zone
boundary, but at the hot spot where the antiferromagnetic spin fluctuation
strongly couples to the electrons on the Fermi surface. The present
experimental results unambiguously indicate the spin-mediated pairing mechanism
in electron-doped high-Tc superconductors.Comment: 4 pages, 4 figure
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