Visualization of personal history for video navigation

Figure 1. Our prototype history-based interface called the Video History System (VHS) aids navigation through the management of a user’s personal viewing history. Playback of video is controlled with familiar tools such as play/pause, seek and filmstrip (left)- the VHS records each part of the video viewed by the user. The history is then visualized in one of two ways: as Video Tiles (centre) or as a Video Timeline (right).1 We present an investigation of two different visualizations of video history: Video Timeline and Video Tiles. Video Timeline extends the commonly employed list-based visualization for navigation history by applying size to indicate heuristics and occupying the full screen with a two-sided timeline. Video Tiles visualizes history items in a grid-based layout by follow-ing pre-defined templates based on items ’ heuristics and or-dering, utilizing screen space more effectively at the expense of a clearer temporal location. The visualizations are com-pared against the state-of-the-art method (a filmstrip-based visualization), with ten participants tasked with sharing their previously-seen affective intervals. Our study shows that our visualizations are perceived as intuitive and both outperform and are strongly preferred to the current method. Based on these results, Video Timeline and Video Tiles provide an ef-fective addition to video viewers to help manage the growing quantity of video. They provide users with insight into their navigation patterns, allowing them to quickly find previously-seen intervals, leading to efficient clip sharing, simpler au-thoring and video summarization

Graphical History List with Multi-Window Support on a Mobile Web Browser

Rolling back to previously visited Web pages and opening multiple browser windows or tabs at the same time are common activities in a Web browsing session on a PC. When using a mobile device for Web browsing, these usage patterns have to be supported seamlessly in the mobile environment under the additional constraint of limited screen real estate. In this paper, we introduce a solution called Rolling History, a user interface targeted for mobile devices with 4-way navigation control and graphics acceleration hardware. We tested the usefulness of a Rolling History prototype in two small-scale user studies and the results indicate that Rolling History is a useful feature for Web history navigation and browser windows management. The Rolling History case demonstrates how to design a unique user interface for a mobile device without displacing the deep-seated use patterns that people have found useful on a PC

Novo paradigma de navegação Web : separadores hierárquicos com integração de favoritos e histórico

Tese de mestrado integrado. Engenharia Informática e Computação. Faculdade de Engenharia. Universidade do Porto. 201

Designing for Experiences, Case of a Mobile Imaging System

Tämä lopputyö kuvailee erään kuvapalvelun suunnitteluprosessia. Palvelua käytetään esimerkkinä siitä, kuinka suunnittelua voidaan tehdä käyttökokemusta varten. Työ alkaa esittelemällä tutimuskysymykset ja syyt niiden valitsemiseen. Koska tuotettu palvelu on ryhmätyö, myös henkikohtainen roolini eritellään sen tekemisessä. Työn kannalta oleelliset käsitteet esitellään antamaan yleiskuva työn aihealueesta ja muista siihen liittyvistä tutkimuksista. Muita aihealueella vaikuttavia palveluita ja systeemejä käydään myös läpi vertailun vuoksi. Käyttökokemukseen liittyviä piirteitä käydään läpi havainnollistamaan suunnittelufilosofian erityispiirteitä ja kuinka esitelty palvelu huomioi näihin liittyvää problematiikkaa muun muassa minimoidakseen huonojen kokemusten todennäköisyyksiä. Lopuksi tuotettua palvelukonseptin arviointia käydään läpi useiden käytettävyystestien kautta. Testit paljastivat konseptin yleisen hväksyttävyyden, mutta paljastivat myös ongelmakohtia. Huomionarvoista on, että tulokset korreloivat suunnittelutavoitteiden kanssa, antaen uskoa että käyttäjäkokemuksia varten suunniteleminen on mahdollista tiettyihinn rajoihin asti.This thesis describes a design process of a mobile imaging service. The service is used as a case example to study how experiences can be designed for. At first, the research questions are introduced and their relevance is explained in context. As the produced system is team process, personal role in making it is also clarified. State of the art is then studied. Relevant concepts are introduced to give an overview of the field in general. Few other systems and services operating on the same field are introduced for the sake of comparison. The design philosophy is then introduced to outline aspects that are likely to have an impact to perceived user experience. Examples are given how the designed system copes to the selected aspects and how the potential negative experiences are minimized. Finally, the prototype implementation of the system was evaluated in multiple user tests. The tests showed general acceptance in multiple levels of the process as wells as indicated issues with the design that need to be improved upon in the future. More importantly, the test results show correlation with design aims, thus increasing the confidence that experiences can, to some extent, be designed for