1,552 research outputs found
Single Wall Carbon Nanotube Weak Links
We have reproducibly contacted gated single wall carbon nanotubes (SWCNT) to
superconducting leads based on niobium. The devices are identified to belong to
two transparency regimes: The Coulomb blockade and the Kondo regime. Clear
signature of the superconducting leads is observed in both regimes and in the
Kondo regime a narrow zero bias peak interpreted as a proximity induced
supercurrent persist in Coulomb blockade diamonds with Kondo resonances.Comment: Proceeding for International Symposium on Mesoscopic
Superconductivity and Spintronics 2006, NTT BRL, Atsugi, Japa
Description of polar orbiting satellite data available during the fall 1991 and spring 1992 ice station LEADEX deployments
October 1991.Includes bibliographical references.Research supported by the National Oceanic and Atmospheric Administration under Cooperative Agreement NA 90RAH-00077
Observational and theoretical study of squall line evolution, An
May 29,1992.Includes bibliographical references.Sponsored by National Oceanic and Atmospheric Administration NA90RAH00077.Sponsored by National Science Foundation ATM-9015485
Numerical Simulations of Intermittent Transport in Scrape-Off Layer Plasmas
Two-dimensional fluid simulations of interchange turbulence for geometry and
parameters relevant for the scrape-off layer of confined plasmas are presented.
We observe bursty ejection of particles and heat from the bulk plasma in the
form of blobs. These structures propagate far into the scrape-off layer where
they are lost due to transport along open magnetic field lines. From
single-point recordings it is shown that the blobs have asymmetric conditional
wave forms and lead to positively skewed and flat probability distribution
functions. The radial propagation velocity may reach one tenth of the sound
speed. These results are in excellent agreement with recent experimental
measurements.Comment: 8 pages, 7 figure
Intermittent transport in edge plasmas
The properties of low-frequency convective fluctuations and transport are
investigated for the boundary region of magnetized plasmas. We employ a
two-dimensional fluid model for the evolution of the global plasma quantities
in a geometry and with parameters relevant to the scrape-off layer of confined
toroidal plasmas. Strongly intermittent plasma transport is regulated by
self-consistently generated sheared poloidal flows and is mediated by bursty
ejection of particles and heat from the bulk plasma in the form of blobs.
Coarse grained probe signals reveal a highly skewed and flat distribution on
short time scales, but tends towards a normal distribution at large time
scales. Conditionally averaged signals are in perfect agreement with
experimental measurements.Comment: 12th International Congress on Plasma Physics, 25-29 October 2004,
Nice (France
The emergence of the lean global start-up as a new type of firm
This article contributes to the interplay between international entrepreneurship, innovation networks, and early internationalization research by emphasizing the need to conceptualize and introduce a new type of firm: the lean global startup. It discussed two different paths in linking the lean startup and born-global internationalization strategies. The first path refers to generic lean startups that have undertaken a rapid internationalization strategy (i.e., lean-to-global startups). The second path refers to startups that have started operating on global scale since their inception and adopted the lean startup approach by seamlessly synergizing their global and lean product development activities. The article emphasizes several aspects that could be used as part of the theoretical foundation for conceptualizing lean global startups as a special new type of firm: i) the emergent nature of their business models, including the challenges of partnership development on a global scale; ii) the inherently relational nature of the global resource allocation processes; iii) the integration of the entrepreneurial, effectuation, and global marketing perspectives; iv) the need to deal with a high degree of uncertainty, including the uncertainty associated with cross-border business operations; and v) linking the ex-ante characteristics of lean startups with the ex-post characteristics of born-global firms in order to develop a technology adoption marketing perspective that considers the “crossing the chasm” process as a successful entry into a global market niche
Agglutinated foraminifera using coccoliths as building material: grain handling and wall structure
Absctrac
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