Svenja Hagenhoff

Hydra – An Application Framework for the Development of Context-Aware Mobile Services

A lack of standardisation concerning the handling of context-information and high technical complexity involved in the development of mobile applications are reasons for their low market penetration so far. This article presents ‘Hydra’, a framework to simplify and shorten the development of context-aware mobile applications and therefore to make the development of these applications more economic. The objective of this paper is to give an idea of how to support developers creating context-adaptive mobile services. An implementation shown in this paper demonstrates the usability of this concept for XHTML-based information services.

Datensicherheit und Datenschutz im Cloud Computing — Risiken und Kriterien zur Anbieterauswahl

ZusammenfassungAuf der Suche nach Kostensenkungspotenzial denken viele Unternehmen über die Auslagerung von Software auf fremde Server oder die Nutzung von extern gehosteten Anwendungen nach, um die so entstehenden Skaleneffekte nutzen zu können. Als gröβte Herausforderung wird dabei die Sicherheit angesehen, da die Daten über ein unsicheres Netzwerk — das Internet — übertragen werden und der Ort der Speicherung und Verarbeitung häufig dem Kunden nicht bekannt gegeben wird. Diese Situation führt zu Herausforderungen aus technischer und juristischer Sicht, die bei der Auswahl eines Cloud Computing-Anbieters und insbesondere dem Vertragsabschluss berücksichtigt werden müssen. Mit geeigneten technischen Maβnahmen wie Monitoring oder Verschlüsselung sowie juristischen Mitteln wie EU-Standardvertragsklauseln oder Safe Harbor Principles kann diesen Herausforderungen jedoch begegnet werden.

Empirical Analysis of Usage and Acceptance of Software Distribution Methods on Mobile Devices

Mobile end devices, such as smart phones, are widely distributed and their technical capacities are increasing. End devices have surpassed the original idea of enabling users to talk to each other. Users are now able to install application software on their devices. This is of special interest to companies, as it portrays a new source of income for stakeholders of the value chain in the mobile internet. However, it is unclear how such applications should be technically transferred to the mobile devices. Different technologies are available for this task. This paper examines the previous use and acceptance of software distribution methods. User preferences for technical transmission ways were furthermore determined with surveys. It was not possible to identify a dominant mode of transmission. Acceptance of software distribution methods especially depends on technical affinity and the users gender. Thus, operating systems and producers of end devices should enable usage of multiple ways of transferring data.

Empirical Assessment on User Acceptance of Mobile Applications Deployment

Nowadays, mobile phones are widespread. However, the development, distribution and installation of software on these end devices is a complex problem due to the very heterogeneous landscape of mobile end devices (especially with regard to software platforms, operational concepts and functionality), and the wide range of technical expertise on the side of the end user. Up to now, there are no empirical surveys on the deployment of software on mobile end devices that allow users to understand and assess not only practical usage situations but also further imaginable distribution instruments. Such a study was carried out on a mobile application which users installed on their own mobile phones via Bluetooth.

Empirical Study of Innovation Management in Focal Networks: Partner Selection and Realization

This article presents the results of an empirical study focusing on innovation activities in networks. In the summer of 2005, we interviewed twelve top managers of leading public companies in Germany. In order to develop new products, these companies nowadays have to rely increasingly on partners. However, a large number of unscheduled breakups of these innovation networks indicates that the established processes do not meet the modified requirements. The goal of our study was to gain insights into the coping strategies of focal companies in dealing with this new challenge. Analyzing the partner selection process, it became clear that there is a significant difference between the selection of known partners and new partners concerning the selection criteria and the information sources used. Therefore, it seems advisable to distinguish between these two groups in the selection process. The main result regarding the project management is that, on the one hand, the companies consider the network management aspects an important success factor for interorganizational projects. On the other hand, they have barely implemented these necessary tasks into their processes. As a result, many problems concerning planning, coordination and evaluation arise. This paper offers possible solutions to these problems

Systems Analysis as a Basis for Designing IT in the Media Industry

Systems analysis is the basis for decisions relating to the design and implementation of information technologies in companies. However, in many companies in the media industry systems analysis and modelling of functional and non-functional requirements are not very widespread. No domain-specific reference model exists which could help to conceptualise basic structures and processes. For this reason, objective recommendations for action and development cannot be made, and sustainable and feasible infrastructures cannot be established. The objective of this paper is to determine the current state of research regarding designing IT in the media industry and to introduce a theoretical overview of the instrument of systems analysis based on an example from the publishing industry.

Stefan Christmann, Rasmus Voigts, Svenja Hagenhoff

ZusammenfassungImmermehr Mobilfunkkunden nutzen ihrMobil-telefon für Datendienste. Sie greifen dabei insbesondere mobil auf Internetservices und Seiten im World Wide Web zu. Bei der Nutzung des Mobile Web sind jedoch zahlreiche Limitierungen wie beispielsweise die Datenübertragung, Anzeigegröße und Eingabemöglichkeiten zu beachten. Um das Betrachten von Webseiten zu erleichtern, müssen die Seiten an die mobile Nutzungssituation in mehreren Dimensionen angepasst werden. Dieser Beitrag stellt vier mögliche Anpassungsverfahren vor und bewertet sie.

Personalized Public-Transport Guidance Using Mobile End Devices

Mobility is a vital part of human life. Mobility needs can be met in a variety of ways: motorized and non-motorized individual traffic, local public transport using buses and trains, or mixed systems like taxis and park and ride systems. Individual traffic in particular causes major environment problems and problems of traffic congestion. Strengthening public transport is often favored, but this preference is not reflected in the number of local transport users. This phenomenon can be explained by the fact that a central problem involved in local public transport usage is its complexity. The article presented here develops demands on a personalized local public transport guidance system, analyzes existing systems and presents a solution for a personalized support system for users of local public transport systems. The software Hermes was developed for this purpose. It accompanies the travelers through all steps of public traffic usage — from checking time tables to purchasing tickets to a navigation system for pedestrians guiding the user to a street address destination.

Sicherheitsmodelle für Kooperationen

In diesem Beitrag werden zwei Moglichkeiten der Ausgestaltung rollenbasierter Sicherheitsmodelle auf ihre Eignung zum Festlegen und Uberwachen von Zugriffsrechten in kooperativ genutzten IT-Systemen uberpruft. Anhand vorher erarbeiteter Kriterien wird verdeutlicht, dass sich synergieorientierte Anforderungen besser durch ein zentrales Modell abbilden lassen, spezifische Anforderungen der Kooperationspartner jedoch eher durch ein dezentrales Modell realisiert werden konnen.

Zeitungsverlage zwischen Digitalisierung und Servitization – Eine explorative Dokumentenanalyse

Digitalisierung und Servitization werden in zahlreichen Branchen als Wachstumstreiber angesehen. Ziel dieses Beitrags ist es zu untersuchen, wie sich Digitalisierung und Servitization in der bisher in diesem Zusammenhang wenig betrachteten Medienbranche darstellen. Insbesondere wird folgenden Fragen nachgegangen: Welche Leistungen bieten Verlage an und wie lassen sich diese systematisieren? Welche Marktstrategien verfolgen Verlage? Welche Entwicklungspfade lassen sich ableiten? Welche Voraussetzungen sind mit den jeweiligen Strategien und Entwicklungspfaden verbunden?