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Engineering RNA logic with synthetic splicing ribozymes
(Massachusetts Institute of Technology, 2008)
Reusable components, such as logic gates and code libraries, simplify the design and implementation of electronic circuits and computer programs. The engineering of biological systems would benefit also from reusable ...
Mechanical stiffness-defined matrices for stem cell research and drug screening
(Massachusetts Institute of Technology, 2008)
Synthetic polymer matrices or subtrata with tailored elastic properties provide a powerful method to direct biological cell' differentiation and foster cell multiplication. By changing the stiffness of the substrate, human ...
Insights into formation of semiconductor nanocrystals : from first principles calculations to kinetic models of nucleation and growth
(Massachusetts Institute of Technology, 2008)
Over the past decade the synthesis of colloidal semiconductor nanocrystals of diverse shapes and sizes has sparked tremendous interest in both the industrial and scientific communities. Much of the work thus far has been ...
System dynamics analysis of incentives for Automatic Dependent Surveillance Broadcast (ADS-B) equipage
(Massachusetts Institute of Technology, 2008)
The demand for air transportation is anticipated to continue to grow in the future. In order to accommodate future demands, the U.S. Joint Planning and Development Office (JPDO) proposed the Next Generation Air Transportation ...
Evaluating electronic waste recycling systems : the influence of physical architecture on system performance
(Massachusetts Institute of Technology, 2008)
Many different forms of electronic waste recycling systems now exist worldwide, and the amount of related legislation continues to increase. Numerous approaches have been proposed including landfill bans, extended producer ...
Spectral properties of Kähler quotients
(Massachusetts Institute of Technology, 2008)
The asymptotic behavior for the spectral measure of a Kähler manifold has been studied by many authors in the context of Kähler quantization. It is well known that the spectral measure has an asymptotic expansion, while ...
Single-petaled K-types and Weyl group representations for classical groups
(Massachusetts Institute of Technology, 2008)
In this thesis, we show that single-petaled K-types and quasi-single-petaled K-types for reductive Lie groups generalize petite K-types for split groups. First, we prove that a Weyl group algebra element represents the ...
Gröbner bases in rational homotopy theory
(Massachusetts Institute of Technology, 2008)
The Mayer-Vietoris sequence in cohomology has an obvious Eckmann-Hilton dual that characterizes the homotopy of a pullback, but the Eilenberg-Moore spectral sequence has no dual that characterizes the homotopy of a pushout. ...
Polytopes, generating functions, and new statistics related to descents and inversions in permutations
(Massachusetts Institute of Technology, 2008)
We study new statistics on permutations that are variations on the descent and the inversion statistics. In particular, we consider the alternating descent set of a permutation [sigma] = [sigma] 1 [sigma] 2 an defined as ...
Boundaries of K-types in discrete series
(Massachusetts Institute of Technology, 2008)
Abstract: A fundamental problem about irreducible representations of a reductive Lie group G is understanding their restriction to a maximal compact subgroup K. In certain important cases, known as the discrete series, we ...