Low-dose X-ray CT can reduce the risk of cancer to patients. However, it requires computationally expensive statistical image reconstruction methods for improved image quality. Iterative algorithms require long compute times, so we focus on algorithms that “converge” in few iterations. This paper proposes to apply ordered subsets (OS) methods to Nesterov’s fast firstorder methods for 3D X-ray C...

Regularization is an effective strategy for reducing noise in tomographic reconstruction. This paper proposes a spatially weighted non-convex (SWNC) regularization method for digital breast tomosynthesis (DBT) image reconstruction. With a non-convex cost function, this method can suppress noise without blurring microcalcifications (MC) and spiculations of masses. To minimize the non-convex cost...

Progressive queries (PQ) are a new type of query emerged from numerous data intensive applications. A user formulates a PQ in several steps using a set of inter-related step-queries (SQ). Efficiently processing PQs in a DBMS is crucial in supporting these applications. In our previous work, we introduced a materialized view based approach to efficiently processing PQs, where our focus was on se...

In the framework of the pure spinor approach of superstring theories, we describe the Y-formalism and use it to compute the picture raised b-field. At the end we discuss briefly the new, non-minimal formalism of Berkovits and the related non-minimal b-field. The new superstring formulation of Berkovits [1]-[5], based on pure spinors, has solved the old problem of quantization of superstrings wi...

A mixed hypergraph is characterized by the fact that it possesses C-edges as well as D-edges. In a colouring of a mixed hypergraph, every C-edge has at least two vertices of the same colour and every D-edge has at least two vertices coloured diierently. The upper and lower chromatic numbers , are the maximum and minimum numbers of colours for which there exists a colouring using all the colours...

Li-Na ternary amidoborane, Na[Li(NH(2)BH(3))(2)], was recently synthesized by reacting LiH and NaH with NH(3)BH(3). This mixed-cation amidoborane shows improved dehydrogenation performance compared to that of single-cation amidoboranes, i.e., LiNH(2)BH(3) and NaNH(2)BH(3). In this paper, we synthesized the Li-Na ternary amidoborane by blending and re-crystallizing equivalent LiNH(2)BH(3) and Na...

Due to the rapid growth of the next generation networking and system technologies, computer networks require new design and management. In this context, security, and more specifically, access structures have been one of the major concerns. As such, in this article, sequential secret sharing (SQS), as an application of dynamic threshold schemes, is introduced. In this new cryptographic primitiv...

The Economic factors are leading to the rise of infrastructures provides software and computing facilities as a service, known as cloud services or cloud computing. Cloud services can provide efficiencies for application providers, both by limiting up-front capital expenses, and by reducing the cost of ownership over time. Such services are made available in a data center, using shared commodit...

The use of predictive models to examine defect production and migration in metallic systems requires a thorough understanding the energetics formation migration. In fully miscible alloys, atomistic properties will all have range values that are heavily dependent on local atomic configurations. this work we used simulation tool Large-scale Atomic/Molecular Massively Parallel Simulator (LAMMPS) i...