Recently, many studies are being conducted related to the method of inserting the digital watermark in the QR code. The QR code is made up of a simple repeating black and white module and has many differences compared to general images. In this paper, a watermarking algorithm that can increase the amount of information to be concealed by minimizing the degradation of QR code image quality is pr...

It has been shown in [4, 5, 6, 31] that the Hessenberg iterates of a companion matrix under the QR iterations have low off-diagonal rank structures. Such invariant rank structures were exploited therein to design fast QR iteration algorithms for finding eigenvalues of companion matrices. These algorithms require only O(n) storage and run in O(n) time where n is the dimension of the matrix. In t...

Quick response (QR) code is the prevalent trademark for a type of matrix barcode symbol. That code is always scanned to efficiently acquire data, especially for mobile device users. It involves the capabilities of data storage, reliable readability and strong error correction. This paper utilizes these properties of a QR code to propose an image tamper detection and recovery scheme for grayscal...

This paper is concerned with how the QR factors change when a real matrix A suffers from a left or right multiplicative perturbation, where A is assumed to have full column rank. It is proved that for a left multiplicative perturbation the relative changes in the QR factors in norm are no bigger than a small constant multiple of the norm of the difference between the perturbation and the identi...

This paper proposes QR-based criteria for efficient selection of multi-mode precoders in multi-user multiple-input multiple-output (MU-MIMO) precoded systems with a limited feedback. In particular, a MU-MIMO QR based precoding scheme is developed which takes advantage of the overall precoder design among users in conjunction with QR detection. A selection criterion is developed to identify the ...

In this paper, we propose a novel representation of the FMLLR transform. This is different from the standard FMLLR in that the linear transform (LT) is expressed in a factorized form such that each of the factors involves only one parameter. The representation is mainly motivated by QR-decomposition of a square matrix and hence is referred to as QR-FMLLR. The mathematical expressions and steps ...

The desire to share and reuse knowledge has led to the establishment of a new knowledge representation language: the Web Ontology Language (OWL). The design choices made in OWL are properly documented, but their implications for AI research are not yet clear. This thesis explores the expressiveness of OWL by formalising the vocabulary and models used in qualitative reasoning (QR), and the appli...

Objective(s): Response surface methodology (RSM) by central composite design (CCD) was applied to statistically optimize the preparation of Rutin-Quercetin (Ru-Qr) dual drug loaded human hair keratin nanoparticles as well as evaluate the characteristics. Materials and Methods: The effects of three independent parameters, namely, temperature (X1:10-40 C), surfactant (X2: SDS (1), SLS (2), Tween-...

  Background: Quercetin is a strong antioxidant and long-term treatment of STZ-diabetic animals and it has been shown to reduce oxidative stress.   Objective: Antioxidants have essential effect on spermatogenesis and sperm parameters. Enhanced oxidative stress and changes in antioxidant capacity are considered to play an important role in the pathogenesis of chronic diabetes mellitus.   Methods...

The QR algorithm is an algorithm for computing the spectral decomposition of a symmetric matrix [9]. Despite it’s high accuracy, other methods are often preferred for the symmetric eigenvalue problem due to the QR algorithm’s relatively poor performance [13]. In recent years, new techniques have arisen that dramatically improve its performance. The restructured symmetric QR algorithm, introduce...