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Travel is important for many people, but the more people travel, the higher the consumption of fossil fuels, and the greater the chances of diseases spreading over distances. Digital travel - defying distance and reality? Clearly, this is not compatible with flexible digital travel, either in terms of where one can be while travelling, or where one can travel to. Rethinking digital travel Real travel implies a journey, which involves a departure, passage, and an arrival (Leed, 1991). [Extracted from the article]

Thank you, William Boyd. Today I squeezed my way on to a crowded train. Luckily I opened the NS to your 'Between two eternities' (What Makes Us Human?, 11 July) [...]

David Selbourne's obsessive article on 'The challenge of Islam' (2 May) almost congratulates jihadists. I prefer to live 'on the ground' in Mona Siddiqui's world ('The Arabisation of Islam', 2 [...]

For once I have to disagree with Felix Martin (Real Money, 18 April). Yes, the hipsters of Shoreditch and the Santa Clara Valley do suffer from technological solutionism (the belief [...]

Several times this year and last, I have had a meal out only to read Will Self's description of the same meal a week or two later. This was enjoyable [...]

Please thank Robin Ince for bringing back some emotional memories ('The quiet rebellion over libraries', 24 January). For this bright working-class boy from a home full of life but largely [...]

David Blanchflower's column 'What the US can teach Oxbridge' (20 December) reminded me of an interview a senior Oxbridge administrator gave after another batch of impeccably qualified comprehensive-school pupils had [...]

Your 22 November issue ('Advantage Cameron') was a bit of a roller-coaster ride. First, David Marquand's beautifully compact survey of recent economic and political events. Reading it left me hopeful [...]

Just writing to say how much I enjoyed the 11 October special issue, guest-edited by Melvyn Bragg: great articles, stories and columns. I took it away on a short break [...]

Reading Laurie Penny's 'Proud to say nope to the Pope' (20 September) on the train, I realised I was agreeing out loud. I did the same reading her column about [...]

JOHN WATERWORTH VIA SOCIAL MEDIA The current issue focussing on hunger and food justice (NI 533) is a cracker. Feeling very grateful to past self for subscribing. [Extracted from the article]

Most discussions of hypertext usability are not founded in empirical measurement but more on conjectures based on personal experience. In this paper we report on two empirical analyses of hypertext usability, focusing on the quality of links produced by different means. We conducted two experiments to test the predicted relevance and the evaluated relevance of links, that is, where links are evaluated either before or after they are traversed.In order to evaluate these two kinds of relevance, we conducted two experiments where a hypertext document was created from a printed text. In each experiment we compared the relevances of three different sets of links. One set was created by a human author, whereas the second set was created automatically using the HEFTI (Hypertext Extraction From Text Incrementally) model for converting text into hypertext. We also generated a third set of links by assigning links randomly between nodes.The main goal of this research was to develop empirical tests that evaluate the usability of hypertext links. A second goal was to test the validity of automatically generated links using the HEFTI model. In this paper we detail the two experiments, and discuss their implication for methods of hypertext usability assessment and design.

We describe a method to derive design models for hypermedia interfaces from the bottom up. Firstly, we compile a list of hypermedia interface features which we classify according to the category of functions they fulfill. We then describe an experiment in which candidate designs for low-level interface features were designed and tested for recognizability. In the experiment, icons for each of 61 hypermedia concepts were generated and then judged. Finally, we outline and illustrate a model induction phase in which low-level features are combined into an overall interface model, via "micro-models" that take account of the types of icons that worked best for each class of interface feature. We suggest that, at least for hypermedia systems, a bottom-up approach to interface design based on the functions of low-level features is preferable to the dominant, top-down approach based around one or more metaphors. Copyright 1993, 1999 Academic Press

Several letters to the editor are presented in response to articles that appeared in previous issues including "That's what Machiavelli can teach us," by Jonathan Powell in the October 18, 2010 issue, "Advantage Cameron," by David Marquand in the November 22, 2010 issue, and a column on a poem by poet Ted Hughes that appeared in the October 11, 2010 issue.

Letters to the editor are presented in response to articles in previous issues including an essay on the UK Independence Party by Rafael Behr and "What Makes Us Human?" by Vince Cable, both in the April 18, 2014, issue, and "Anxiety Nation" by Sophie McBain in the April 11, 2014, issue.

Several letters to the editor are presented in response to articles in previous issues including "The martyr complex" by Rafael Behr on British Deputy Prime Minister Nick Clegg, "First Thoughts" by Peter Wilby about housing benefits in Great Britain, and a review of Victor Serge's "Memoirs of a Revolutionary" by John Gray, all in the July 2, 2012 issue.

Several letters to the editor are presented in response to articles that appeared in the October 5, 2009 issue including the unsigned editorial "Brown fights on to the last," "High school delusional," by Fran Abrams and "Why I became a Conservative," by Eric Pickles.

Letters to the editor are presented in response to articles in previous issues, including "First Thoughts" by Peter Wilby and "When Youth Is a Foreign Country" by Marina Benjamin, both in the May 9, 2014, issue, and "The Challenge of Islam" by David Selbourne in the May 2, 2014, issue.

Several letters to the editor are presented in response to articles that appeared in earlier issues of the magazine including "No drugs. No sex. And no leaders," by Laurie Penny that appeared in the January 31, 2011 edition, and "The Tories want to send the schools back by 50 years," by Peter Hyman, and "An unjust sentence for an idiotic boy," by Alice Miles, both of which appeared in the January 24, 2011 issue.

Several letters to the editor are presented in response to articles that appeared in previous issues of the magazine including "Don't be scared of the dogma," by Roy Hattersley and "The 50 People who matter," both of which appeared in the September 27, 2010 issue, and "Proud to say nope to the Pope," by Laurie Penny in the September 20, 2010 edition.