The Visual Secret Sharing Scheme Based on the Rgb Color System

The visual secret sharing (VSS) scheme is a method to maintain the confidentiality of a se-cret image by sharing it to some number participants. A (k, n) VSS divides the secret images into n parts, that are called shadows ; to recover the secret back, k shadows should be stacked. Some methods have been developed to implement VSS for color images. However, the methods are only suitable for images with limited number of colors. When more colors are used, the resulted stacked shadow image becomes unclear. Besides that, the size of the shadows becomes bigger as more colors are used. We develop a new method implementing the VSS using the RGB color system. Using our method, the problem related to the unclear stacked shadow image can be overcome

Pyramid scheme

Debbie Herridge unwraps the mummy of ‘topic work’ and discovers a wealth of practical science experiments within...

65+ Membership Scheme

This report shares the journey of three partners' experiment with digital technology to address societal challenges linked to ageing and social isolation. In recent years artsdepot has seen enormous changes to its business model driven by the advance of digital communication tools, rapidly increasing use of social media, and changing consumer behaviours. The project team felt that digital innovation was typically aimed at the young but wondered if there was greater potential to increase attendance and sales while also addressing social isolation through creating digital innovations with older people. A range of partners worked on the project: artsdepot (arts partner and project lead) is a multi-art form venue based in North Finchley welcoming 130,000 audience members annually. DigiLab (research partner) is an R&D laboratory based at London College of Communication, University of the Arts London. Ingelby (tech partner) is a digital agency specialising in app building and mobile app development, as well as mobile website design , e-commerce development , customised CRM systems and creative digital media. This project aimed to explore digital technologies that could help create increased levels of arts attendance among older people by identifying barriers and designing digital solutions. artsdepot felt that by enabling increased arts attendance and therefore facilitating opportunities to socialise, they might help establish new friendships while providing enriching creative experiences. Additionally, the team felt there was an additional benefit in terms of demonstrating an economic model for engaging older audiences. Having learnt in the application phase that two thirds of older people have more disposable income than any other age group, artsdepot felt that if it could address other barriers to attendance, it could also improve ticket sales and build a case for increased focus on older audiences

On a new compactification of moduli of vector bundles on a surface, IV: Nonreduced moduli

The construction for nonreduced projective moduli scheme of semistable admissible pairs is performed. We establish the relation of this moduli scheme with reduced moduli scheme built up in the previous article and prove that nonreduced moduli scheme contains an open subscheme which is isomorphic to moduli scheme of semistable vector bundles.Comment: 20 pages, additions and removal

A microwave dielectric biosensor based on suspended distributed MEMS transmission lines

Design and characterization of a miniature microwave dielectric biosensor based on distributed microelectromechanical systems (MEMS) transmission lines (DMTL) is reported in this paper. The biosensor has been realized by bonding the DMTL device with an acrylic fluidic channel. In order to demonstrate the sensing mechanism, the sensor is used to detect the small variation of the concentration of aqueous glucose solutions by measuring the electromagnetic resonant frequency shift of the device. It is observed from the results that the second notch of the reflection coefficient (S-11) varies from 7.66 to 7.93 GHz and the third notch of the reflection coefficient varies from 15.81 to 15.24 GHz when the concentration of the glucose solution ranges from 0 to 347 mg/ml, which indicates that higher order notches have higher sensitivities if looking at the absolute change in frequency

KK-anonymous Signaling Scheme

We incorporate signaling scheme into Ad Auction setting, to achieve better welfare and revenue while protect users' privacy. We propose a new \emph{$K$-anonymous signaling scheme setting}, prove the hardness of the corresponding welfare/revenue maximization problem, and finally propose the algorithms to approximate the optimal revenue or welfare