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The continuous Skolem-Pisot problem
- Paul Bell, J. Delvenne, R. Jungers, V. Blondel
- Computer Science, Mathematics
- Theor. Comput. Sci.
- 1 September 2010
We study decidability and complexity questions related to a continuous analogue of the Skolem-Pisot problem concerning the zeros and nonnegativity of a linear recurrent sequence. Expand
Transfection mediated by gemini surfactants: engineered escape from the endosomal compartment.
- Paul Bell, M. Bergsma, +5 authors J. Engberts
- Chemistry, Medicine
- Journal of the American Chemical Society
- 12 February 2003
The structure of the lipoplex formed from DNA and the sugar-based cationic gemini surfactant 1, which exhibits excellent transfection efficiency, has been investigated in the pH range 8.8-3.0… Expand
Targeted Gene Delivery to Human Airway Epithelial Cells with Synthetic Vectors Incorporating Novel Targeting Peptides Selected by Phage Display
Human airway epithelial cell targeting peptides were identified by biopanning on 1HAEo-cells, a well characterised epithelial cell line. Bound phage were recovered after three rounds of binding, high… Expand
A new methodology for automatic fault tree construction based on component and mark libraries
Abstract During the design stage of the development of a new system, automated fault tree construction would produce results a lot sooner than the manual process and hence be highly beneficial in… Expand
Gemini surfactants: new synthetic vectors for gene transfection.
- A. Kirby, P. Camilleri, +13 authors M. C. P. van Eijk
- Chemistry, Medicine
- Angewandte Chemie
- 4 April 2003
The superior surfactant properties of cationic gemini surfactants are applied to the complex problem of introducing genes into cells. Of almost 250 new compounds tested, of some 20 different… Expand
On undecidability bounds for matrix decision problems
In this paper we show an elementary proof of undecidability of the reachability problem for a set of 5 two-dimensional affine transformations. Expand
On the Undecidability of the Identity Correspondence Problem and its Applications for Word and Matrix Semigroups
We introduce the Identity Correspondence Problem (ICP) in the spirit of Post’s Correspondence problem and show that it is undecidable. Expand
Mortality for 2×2 Matrices Is NP-Hard
We study the computational complexity of determining whether the zero matrix belongs to a finitely generated semigroup of two dimensional integer matrices (the mortality problem). Expand
Scalar Ambiguity and Freeness in Matrix Semigroups over Bounded Languages
There has been much research into freeness properties of finitely generated matrix semigroups under various constraints, mainly related to dimensions of the generator matrices and the semiring over which the matrices are defined. Expand
Biophysical characterization of an integrin-targeted lipopolyplex gene delivery vector.
Nonviral gene delivery vectors now show good therapeutic potential: however, detailed characterization of the composition and macromolecular organization of such particles remains a challenge. This… Expand