3,505 research outputs found
Technologies for 3D Heterogeneous Integration
3D-Integration is a promising technology towards higher interconnect
densities and shorter wiring lengths between multiple chip stacks, thus
achieving a very high performance level combined with low power consumption.
This technology also offers the possibility to build up systems with high
complexity just by combining devices of different technologies. For ultra thin
silicon is the base of this integration technology, the fundamental processing
steps will be described, as well as appropriate handling concepts. Three main
concepts for 3D integration have been developed at IZM. The approach with the
greatest flexibility called Inter Chip Via - Solid Liquid Interdiffusion
(ICV-SLID) is introduced. This is a chip-to-wafer stacking technology which
combines the advantages of the Inter Chip Via (ICV) process and the
solid-liquid-interdiffusion technique (SLID) of copper and tin. The fully
modular ICV-SLID concept allows the formation of multiple device stacks. A test
chip was designed and the total process sequence of the ICV-SLID technology for
the realization of a three-layer chip-to-wafer stack was demonstrated. The
proposed wafer-level 3D integration concept has the potential for low cost
fabrication of multi-layer high-performance 3D-SoCs and is well suited as a
replacement for embedded technologies based on monolithic integration. To
address yield issues a wafer-level chip-scale handling is presented as well, to
select known-good dies and work on them with wafer-level process sequences
before joining them to integrated stacks.Comment: Submitted on behalf of EDA Publishing Association
(http://irevues.inist.fr/handle/2042/16838
Isogeometric Boundary Elements in Electromagnetism: Rigorous Analysis, Fast Methods, and Examples
We present a new approach to three-dimensional electromagnetic scattering
problems via fast isogeometric boundary element methods. Starting with an
investigation of the theoretical setting around the electric field integral
equation within the isogeometric framework, we show existence, uniqueness, and
quasi-optimality of the isogeometric approach. For a fast and efficient
computation, we then introduce and analyze an interpolation-based fast
multipole method tailored to the isogeometric setting, which admits competitive
algorithmic and complexity properties. This is followed by a series of
numerical examples of industrial scope, together with a detailed presentation
and interpretation of the results
Lat. Papaver et la suite
A great number of derivatives of the Latin etymon papaver, believed to be Pan-
Romance, show formal irregularities for which there has rarely been any attempt at explanation.
Some common features, especially in Portuguese and Sardinian, together with
forms already documented in Latin enable us to establish etymons representing ancient
variants of papaver
On a generalized notion of metrics
In these notes we generalize the notion of a (pseudo) metric measuring the
distance of two points, to a (pseudo) n-metric which assigns a value to a tuple
of n points. We present two principles of constructing pseudo n-metrics. The
first one uses the Vandermonde determinant while the second one uses exterior
products and is related to the volume of the simplex spanned by the given
points. We show that the second class of examples induces pseudo n-metrics on
the unit sphere of a Hilbert space and on matrix manifolds such as the Stiefel
and the Grassmann manifold. Further, we construct a pseudo n-metric on
hypergraphs and discuss the problem of generalizing the Hausdorff metric for
closed sets to a pseudo n-metric
Genetic distances between Donax marincovichi and Donax obesulus confirmed by morphological features
Veränderungen der Forschungsevaluierung – Chancen für eine ökologische Agrarforschung mit gesellschaftlicher Wirkung
Several actors in science, civil society and policy call for changes in the current publication and reputation system, which have implications for organic farming research. Change processes include funding and agenda setting, support for interdisciplinary and transdisciplinary approaches, societal relevance and impact as criteria for research evaluation, open access publication and transparent, plural and interactive forms of peer-review and recognition. These developments show synergies that help to increase the support and reduce the effort for evaluation beyond scientific impact
La toponymie préromaine de la Sardaigne.
Lautore espiora la consistenza dei microtoponimi di origine preromana nella-rea centrale della Sardegna. Ne nIeva la notevole quantitá e si sofferma sulla loro struttura t o quadripartita. Redige un elenco ragionato di suffissi paleosardi, strutturati in due serie (atona e tonica)
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