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Bereich: Suchergebnisse
Publikation aWall: Agile Collaboration using Large Digital Multi-Touch Cardwalls(12/2016) Anslow, Craig; Burkhard, Roger; Kropp, Martin; Mateescu, Magdalena; Vischi, Dario; Zahn, CarmenDespite the availability of many digital agile board tools, most co-located agile software teams still use physical cardboards for their daily standup meetings. This is due to the fact that existing digital agile boards lacks supporting a collaborative workspace, direct interaction for the whole team in meetings, or making project information directly visible. In this paper we present aWall, a digital agile cardwall designed for the highly collaborative agile work style using large multi-touch wall displays. The effectiveness of aWall was evaluated in a user study with eleven software practitioners. Our findings indicate that aWall enables and encourages team work due to the large size of the wall, accessibility and visibility of large amounts of information, and possibility of customization of the interface. Based on this work, we suggest that augmenting digital cardwalls with large interactive touch technology and new interaction concepts is a useful way to support effective collaborative agile software development processes.01B - Beitrag in Magazin oder ZeitungPublikation Eine Kategorisierung mobiler Applikationen(12/2012) Hildebrandt, Andreas; Luthiger, Jürg; Stamm, Christoph; Yereaztian, ChrisMobile Applikationen lassen sich auf verschiedene Arten entwickeln. Je nachdem welche Anforderungen an eine Applikation gestellt werden, sollte zwischen einer nativen Umsetzung, einer Webapplikation oder einer Mischung aus beidem gewählt werden. Die Wahl der am besten passenden dieser drei Kategorien ist nicht immer einfach und sollte im Vorfeld genau abgeklärt werden. In diesem Artikel zeigen wir die Eigenheiten dieser drei Kategorien auf und vergleichen sie miteinander anhand von Beispielen und einer fiktiven Ticketing-Applikation.01B - Beitrag in Magazin oder ZeitungPublikation Equivalence Testing Mobile Apps(12/2012) Denzler, Christoph; Kröni, Daniel; Moschko, MaximMobile apps are often developed and then evolved on more than one mobile operating system. For the publisher of such apps, the problem is how to ensure equivalence of the product on the various platforms, in the sense of acting equivalently with respect to a test set. In this paper we present an approach that tackles this problem from two directions: architecture and testing. First we will explain the role and pitfalls of reference architectures. Then we will present our equivalence testing framework. It is based on mocking components of the target implementation. Instead of implementing mock components for all platforms, our approach is to implement these mocks only once and run them on a central server. On the tested target device, stub components are injected that forward to their server-based counterparts. Thus the exactly same test code is applied to all platform specific implementations.01B - Beitrag in Magazin oder ZeitungPublikation Secure Physical Access with NFC-enabled Smartphones(12/2015) Arnosti, Christof; Gruntz, Dominik; Hauri, MarcoThis paper presents a smartphone-based physical access control system in which the access points are not directly connected to a central authorization server. The access points ask the mobile phone whether a particular user has access or not. The mobile phone then relays such a request to the access server. The authentication of the smartphone is based on public-key cryptography. This requires that the private key is stored in a secure element or in a trusted execution environment to prevent identity theft. In our solution we use the following secure element archiectures: Host Card Emulation (HCE) and a microSD-based secure element. We show that the HCE approach cannot solve the relay attack under conservative security assumptions and we present and discuss an implementation based on a microSD secure element that still allows the access points to connect to the authorization server upon every access albeit the access points are not connected with it.01B - Beitrag in Magazin oder ZeitungPublikation Man-in-the-Middle: Analyse des Datenverkehrs bei NFC-Zahlungen(12/2014) Arnosti, Christof; Gruntz, DominikDas Bezahlen mit kontaktlosen Kreditkarten liegt im Trend, insbesondere seit grosse Ladenketten wie Migros, Coop oder Valora diese Bezahlmöglichkeit unterstützen. Mit Google Wallet, Apple Pay und Tapit von Swisscom besteht vermehrt auch die Möglichkeit mittels Smartphone kontaktlose Zahlungen auszulösen. Wir haben die Daten, die zwischen einem Terminal und einer Karte bzw. einem Mobiltelefon ausgetauscht werden, bei einer echten Bezahlung aufgezeichnet. In diesem Artikel beschreiben wir dieses Protokoll und die Software, die nötig ist, um solche Daten aufzuzeichnen.01B - Beitrag in Magazin oder ZeitungPublikation Android Best Practices to Improve Battery Efficiency(12/2014) Yereaztian, Chris; Luthiger, JürgMulti-core CPUs, motion sensors and multiple wireless radios all draw a significant amount of power which make a regular battery recharge a necessity. Applications, which extensively use the available hardware, reduce the battery runtime severely. Continuous motion sensor recording excessively stress a smartphone’s CPU preventing it from entering a deep sleep state. Android 4.4 introduces a new batchmode for sensors data to keep the CPU asleep for longer periods of time by delaying the reporting of new data from the sensors. The same technique is applied when writing to flash memory. When using a content provider to store data write amplification occurs, which affects writing performance negatively. The longer write times due to the reduced writing speed decrease the battery efficiency even more. A similar batch-oriented strategy reduces the occurrence of write amplification. In return, the reduced writing time improves the battery efficiency.01B - Beitrag in Magazin oder ZeitungPublikation Qualitative Study of Successful Agile Software Development Projects(12/2014) Kropp, Martin; Meier, AndreasVarious studies show that the agile method has become a mainstream methodology for software development. When agile pioneers introduced this approach, they executed very successful projects which lead to the enormous popularity of agile development. With becoming mainstream, less experienced teams started to apply the agile approaches and news about failed agile projects appeared. This raises the question, what it needs to conduct successful agile projects. In a qualitative study we asked IT companies about the essential success factors in their successful agile projects. We found that there was a strong focus on engineering and management best practices. We found that when these practices did not work, mature teams sensed that following a recipe is not sufficient, and they started adapting the agile process to their needs. Applying a sense-making methodology like the Cynefin framework, theoretically explains our observations in the study.01B - Beitrag in Magazin oder Zeitung
