Proof search for programming in Intuitionistic Linear Logic (Extended Abstract)

Introduction Linear logic (denoted LL) [6] is a powerful and expressive logic with connections to a variety of topics in computer science as logic programming, concurrency or functional programming. From the logical side, LL combines the constructive content of Intuitionistic Logic with the symmetries of Classical Logic and from the computation side, it offers a control on resource management and evaluation order. Concerning functional programming, applications of LL to computation can be seen through the Curry-Howard isomorphism in which propositions are interpreted as types, proofs as programs and proof normalization process as computation. Works have been recently devoted to term assignment for intuitionistic linear logic (ILL) [3, 12] and full LL [1] with proposals of linear lambda calculi having important properties as subject-reduction or substitution property. Having natural deduction and sequent calculus proof systems of ILL (that are proved equivalent), we can invest

Contact Resistance in Top Gate / Bottom Contact OTFTs.

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Contact resistance and threshold voltage extraction in n -channel organic thin film transistors on plastic substrates

n-channel organic thin film transistors were fabricated on polyethylene naphthalate substrates. The first part of the paper is devoted to a critical analysis of eight methods to extract the threshold voltage from the transfer characteristic in the linear regime. Next, to improve electron injection and reduce contact resistance, self-assembled monolayers (SAMs) were deposited on the gold source and drain electrodes. The subsequent modification on the current-voltage characteristics of the transistors is analyzed by the transfer line method, using a threshold-voltage-corrected gate voltage. The improved performance of the device obtained with some of the SAM treatments is attributed to both a better morphology of the semiconductor film, resulting in an increased channel mobility, and to easier electron injection, which manifests itself through a lowering of the contact resistance. Interestingly, the modulation of the contact resistance exactly follows an opposite behavior to what reported in the case of p -channel devices, which brings further evidence for that charge injection is tuned by the direction and magnitude of the dipole moment of the SAM. © 2009 American Institute of Physics

Vertical Transport in Spin Coated Ultra Thin Polycrystalline Pentacene Organic Stacks

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Vertical Transport in Spin Coated Ultra Thin Polycrystalline Pentacene Organic Stacks

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Transfer of the shared epitope through microchimerism in women with rheumatoid arthritis

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LABELLED PROOF SYSTEMS FOR INTUITIONISTIC provability

In this paper, we propose new labelled proof systems to analyse the intuitionistic provability in classical and linear logics. An important point is to understand how search in a non-classical logic can be viewed as a perturbation of search in classical logic. Therefore, suitable characterizations of intuitionistic provability and related labelled sequent calculi are defined for linear logic. An alternative approach, based on the notion of proof-net and on the definition of suitable labelled classical proof-nets, allows to directly study the intuitionistic provability by constructing intuitionistic proof-nets for sequents of classical linear logic

Interface Control in Organic Electronics Using Mixed Monolayers of Carboranethiol Isomers

We employ mixed self-assembled monolayers of carboranethiols to alter the work function of gold and silver systematically. We use isomers of symmetric carboranethiol cage molecules to vary molecular dipole moments and directions, which enable work function tunability over a wide range with minimal alterations in surface energy. Mixed monolayers of carboranethiol isomers provide an ideal platform for the study and fabrication of solution-processed organic field-effect transistors; improved device performance is demonstrated by interface engineering