In this paper we present UAuth, a two-layer authentication framework that provides more security assurances than two-factor authentication while offering a simpler authentication experience. When authenticating, users first verified their static credentials (such as password, fingerprint, etc.) on their devices to achieve the local-layer authentication, then submit the OTP-signed response gener...

An upper dominating set in a graph is a minimal (with respect to set inclusion) dominating set of maximum cardinality. The problem of finding an upper dominating set is generally NP-hard, but can be solved in polynomial time in some restricted graph classes, such as P4-free graphs or 2K2-free graphs. For classes defined by finitely many forbidden induced subgraphs, the boundary separating diffi...

This paper deals with the joint spectral radius of a finite set of matrices. We say that a set of matrices has the finiteness property if the maximal rate of growth, in the multiplicative semigroup it generates, is given by the powers of a finite product. Here we address the problem of establishing the finiteness property of pairs of 2× 2 sign-matrices. Such problem is related to the conjecture...

This note deals with linear interval systems whose parameters in system matrix are expressed by intervals. We formalize the system reasoning about structures of interval systems by the structural perturbation principle: the interval system would have the interval property when its underlying sign structure include the component that has the corresponding sign property and the norm of the rest o...

This paper deals with qualitative and structural reasoning on linear interval systems whose parameters are specified by intervals . We formalize the systems of reasoning about structures of interval systems by the qualitative perturbation principle : the interval system would have the interval property when its underlying sign structure include the component that has the corresponding sign prop...

BACKGROUND Colon cancer has always been diagnosed at a late stage, which is associated with poor prognosis. The currently used serum tumor markers CEA and CA19-9 display low sensitivity and specificity and may not have diagnostic value in early stage colon cancer. Thus, there is an urgent need to identify novel serum biomarkers for use in the early detection of colon cancer. METHODS In this s...

Objective(s): This study is aimed to design and synthesize a prodrug of 5-aminosalicylic acid and evaluate its ameliorative effect on experimental ulcerative colitis (UC).Materials and Methods: 5-Aminosalicylic acid-alanine (5-ASA-ALA) was synthesized and characterized. Its stability study was conducted in rat plasma and in the gastroint...

The novel dimer [Cp(2)Zr[upper bond start]([minus sign in circle])S([plus sign in circle])CH(Ph)CH[double bond]C[upper bond end]PPh(2)](2), the first example of a structurally characterised sulfur-bridged binuclear zirconathiolane complex, was prepared, characterised by NMR spectroscopy and X-ray crystallography, and some aspects of its solution behaviour were studied.

Shared technology platforms are often governed by standard setting organizations (SSOs), where interested parties use a consensus process to address problems of technical coordination and platform provision. Economists have modeled SSOs as certification agents, bargaining forums, collective licensing arrangements and R&D consortia. This paper integrates these diverse perspectives by adapting El...