921 research outputs found
Nonlocality, Asymmetry, and Distinguishing Bipartite States
Entanglement is an useful resource because some global operations cannot be
locally implemented using classical communication. We prove a number of results
about what is and is not locally possible. We focus on orthogonal states, which
can always be globally distinguished. We establish the necessary and sufficient
conditions for a general set of 2x2 quantum states to be locally
distinguishable, and for a general set of 2xn quantum states to be
distinguished given an initial measurement of the qubit. These results reveal a
fundamental asymmetry to nonlocality, which is the origin of ``nonlocality
without entanglement'', and we present a very simple proof of this phenomenon.Comment: 5 pages, 1 figure. Improved in line with referees comments,
references added, typo corrected. To appear in Phys. Rev. Let
London Live Goes Live: What about Media Plurality in UKâs Capital?
Londonâs new local television channel, London Live is due to launch on the 31st of March. Its owner also owns the cityâs largest circulation local newspaper and two national newspapers. University of East Londonâs Jonathan Hardy discusses the implications for media plurality arguing that the key question is how the new service will be regulated
Local Distinguishability of Multipartite Orthogonal Quantum States
We consider one copy of a quantum system prepared in one of two orthogonal
pure states, entangled or otherwise, and distributed between any number of
parties. We demonstrate that it is possible to identify which of these two
states the system is in by means of local operations and classical
communication alone. The protocol we outline is both completely reliable and
completely general - it will correctly distinguish any two orthogonal states
100% of the time.Comment: 5 pages, revte
Tackling the edge dynamic graph colouring problem with and without future adjacency information
Many real world operational research problems, such as frequency assignment and exam timetabling, can be reformulated as graph colouring problems (GCPs). Most algorithms for the GCP operate under the assumption that its constraints are fixed, allowing us to model the problem using a static graph. However, in many real-world cases this does not hold and it is more appropriate to model problems with constraints that change over time using an edge dynamic graph. Although exploring methods for colouring dynamic graphs has been identified as an area of interest with many real-world applications, to date, very little literature exists regarding such methods. In this paper we present several heuristic methods for modifying a feasible colouring at time-step t into an initial, but not necessarily feasible, colouring for a âsimilarâ graph at time-step t+1t+1 . We will discuss two cases; (1) where changes occur at random, and (2) where probabilistic information about future changes is provided. Experimental results are also presented and the benefits of applying these particular modification methods are investigated
Modifying colourings between time-steps to tackle changes in dynamic random graphs
Many real world operational research problems can be formulated as graph colouring problems. Algorithms for this problem usually operate under the assumption that the size and constraints of a problem are fixed, allowing us to model the problem using a static graph. For many problems however, this is not the case and it would be more appropriate to model such problems using dynamic graphs. In this paper we will explore whether feasible colourings for one graph at time-step t can be modified into a colouring for a similar graph at time-step t+1 in some beneficial manner
Branded Content: The Fateful Merging of Media and Marketing
This is a critical study of the changing relationship between media and marketing communications in the digital age. It examines the growth of content funded by brands, including brandsâ own media, native advertising and the integration of branded content across film, television, journalism and publishing, online, mobile and social media. With a focus on key issues in industry, policy and academic contexts this is essential reading for students of media industries, advertising, marketing and digital media.
This ambitious historical, empirical, and theoretical study examines industry practices, policies, and âproblemsâ, advancing a framework for analysis of communications governance. Featuring examples from the UK, US, EU, Asia, and other regions, it illustrates and explains industry practices, forms, and formats and their relationship with changing market conditions, policies, and regulation. The book provides a wide-ranging and incisive guide to contemporary advertising and media practices, to different arguments and perspectives on these practices arising in industry, policy, and academic contexts, and to the contribution made by critical scholarship, past and present. It also offers a critical review of industry, regulatory, societal, and academic literatures
Stratégies de réalisation de guides polymÚres pour la modulation électro-optique à haut débit
National audienceDe nouveaux polymĂšres Ă©lectro-optiques, sont mis en Ćuvre pour rĂ©aliser des guides selon deux types d'ingĂ©nierie de matĂ©riaux. L'une consiste Ă utiliser un polymĂšre non-linĂ©aire greffĂ© et rĂ©ticulable et l'autre utilise un matĂ©riau hĂŽte, ayant une tempĂ©rature de transition vitreuse Ă©levĂ©e. Nous prĂ©sentons ici, les difficultĂ©s rencontrĂ©es lors de la rĂ©alisation des guides et les stratĂ©gies dĂ©veloppĂ©es pour aboutir, avec ces nouveaux matĂ©riaux, Ă des guides optiques monomodes
Commentary: Branded Content and Media-Marketing Convergence
Your Facebook feed says âRecommended for youâ and âSponsoredâ. Your online magazine says âPaid Contentâ, another in Buzzfeed (2014) says âPromoted Contentâ and lists â12 Backpacking Hacks That Are Vital For Business Tripsâ in an article paid for by Holiday Inn Express. Buzzfeed may also list KFC as âBrand Publisherâ for an article, â11 Things All Busy Families Should Make Time Forâ, including KFCâs Popcorn Nuggets (Buzzfeed, 2015). You read a powerful series of articles on hunger in America, but it is labelled âpaid programmeâ, produced by the Wall Street Journalâs Custom Studios in collaboration with Mini, and includes such branded wisdom as âMini owners are all different. Thereâs no one person that Mini drivers look like. Itâs the same with food insecurity. Itâs all walks of lifeâ. From television product placement to mobile news feeds, brands are burrowing into media content. Exploring that merging of media and marketing was a key impetus behind the Branded Content Research Network, launched in late 2016. It aims to facilitate collaboration between academics, industry professionals and civil society to explore branded content practices and their media policy implications. Here are my reflections on some of the research tasks and policy issues arising from this collective endeavour
L'espace public de JĂŒrgen Habermas, rĂ©examinĂ© Ă la lumiĂšre de ses Ă©crits de jeunesse
L'espace public (1962) de JĂŒrgen Habermas est souvent lu comme le premier ouvrage de sa carriĂšre. Notre mĂ©moire tĂąche de porter un Ă©clairage diffĂ©rent sur celui-ci, de lire L'espace public comme point d'aboutissement de la pensĂ©e habermassienne des annĂ©es 1950. Par l'exploration d'un certain nombre d'Ă©crits mineurs et majeurs prĂ©-1962, L'espace public se rĂ©vĂšle une sorte de thĂ©orie critique de la sociĂ©tĂ©, encore fortement empreinte de marxisme, faisant figure de synthĂšse partielle des Ă©crits de jeunesse.JĂŒrgen Habermas' The structural transformation of the public sphere (1962) is often read as the first landmark of his career. Our study sets out to shed a different light upon it, to read The structural transformation of the public sphere as the arrival point of Habermas' 1950s thought. While we explore a certain number of minor and major pre-1962 works, his thesis reveals itself as some kind of critical theory of society, still deeply rooted in Marxism, that embodies a partial synthesis of his early works
Economics: Ownership and Competion
The ways newspapers developed as products for readers was influenced by their costs and financing, forms of ownership and market competition. This chapter explores the economics of print and online news publishing in Britain and Ireland from 1900 to 2018 and examines the patterns of ownership, concentration and competition in the national, regional and local newspaper markets. The chapter explores the relationship between the financing of the press, market competition and ownership patterns and shows how these have mutually influenced provision. The chapter integrates original analysis of primary and secondary sources and draws on the authorâs research on media and advertising relationships to trace the significance of advertising subsidy for publications, up to contemporary challenges, including falling ad revenues for print, and business responses including advertiser sponsored content. The chapter also provides original table data setting out newspaper ownership and circulation for the period
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