such that (i) |0| = 0, (ii) |x| ≥ 0, for all x ∈ X , (iii) |− x| = |x|, for all x ∈ X , (iv) |x+ y| ≤ |x|+ |y|, for all x, y ∈ X , (v) if tk ∈ F, |tk − t| → 0, and xk, x ∈ X , |xk − x| → 0, then |tkxk − tx| → 0. If | · | satisfies only properties (i) to (iv), then we call | · | a near quasinorm. If the quasinorm satisfies |x| = 0 if and only if x = 0, then it is said to be total. A quasinormed ...

The security analysis of existing QR (Quick Response) code scanners on Android was conducted recently and the result shows that most of those QR code scanners were not able to detect attacks exploiting malicious URLs embedded in QR codes, especially phishing and malware attacks. In our previous study, we proposed a QR code scanner solution called SafeQR that utilized two well-known security API...

This paper describes a new model for presenting local information based on the network proximity. We present a novelty mobile mashup which combines Wi-Fi proximity measurements with QR-codes. Our mobile mashup automatically adds context information the content presented by QR-codes. It simplifies the deployment schemes and allows to use unified presentation for all data points, for example. Thi...

While QR codes have recently become popular as a method of rapidly bringing information to consumer, they have the drawback that they contain no human readable content. This project concerns combining image data with QR codes while maintaining the machine readability of the code. We break each module down into pixels and halftone it to correspond to the image data while preserving the overall s...

Quadratic residue (QR) codes are cyclic, nominally half-rate codes, that are powerful with respect to their error-correction capabilities. Decoding QR codes is in general a difficult task, but great progress has been made in the binary case since the work of Elia [1] and He et al. [2]. Decoding algorithms for certain nonbinary QR codes were proposed by Higgs and Humphreys in [3] and [4]. In [5]...

BACKGROUND In this study, we investigated how to convert the Panax ginseng DNA sequence code and chemical fingerprints into a two-dimensional code. In order to improve the compression efficiency, GATC2Bytes and digital merger compression algorithms are proposed. METHODS HPLC chemical fingerprint data of 10 groups of P. ginseng from Northeast China and the internal transcribed spacer 2 (ITS2) ...

The adoption of a new technology is often affected by its perceived utility and ease of use, both of which could vary by age due to cognitive differences. A recently invented technology, the quick response (QR) code, enables smartphone users to access content on their mobile devices by scanning two-dimensional barcodes. In this paper, we examine awareness, knowledge, and usage of QR codes acros...

This guideline for care of children with craniosynostosis was developed by a national working group with representatives of 11 matrix societies of specialties and the national patients’ society. All medical aspects of care for nonsyndromic and syndromic craniosynostosis are included, as well as the social and psychologic impact for the patient and their parents. Managerial aspects are incorpora...

This article proposes an anti-fake QR codes watermarking algorithm based on the DWT and SVD, aiming at the security problem of QR code in the actual application. Firstly, this paper analyses the advantage of QR code as well as its problems. Secondly, the principle of the chaos encryption and discrete wavelet transform are introduced in detail. Then, we design a new watermarking barcode by the c...