16090986
Developing Web applications for mobile devices
Today, even small mobile devices access the Internet. Therewith, mobility issues have become an important technical and economic topic - not only in new but in proven and successful Web applications as well. The main problem derives from a growing development of heterogeneity in hardware and software of mobile devices. To overcome this problem, this paper presents a framework to develop Web applications for mobile devices. This framework issues important points when developing web application that also focuses on mobile users. This includes completely new developments, as well as development that issue an upgrade of existing Web applications to mobile devices. An important element in this framework is the employment of the fairly new CC/PP standard.
21797693
E-Gov-Risk-Board - Lebenszyklusorientierte Identifikation von Risiken bei E-Government-Anwendungen
3419898
Gain in Transparency versus Investment in the EPC Network - Analysis and Results of a Discrete Event Simulation Based on a Case Study in the Fashion Industry
The diffusion rate of Radio Frequency Identification (RFID) technology in supply chains is lower than expected. The main reason is the doubtful Return On Investment (ROI) mainly due to high tag prices. In this contribution, we leverage a prototypical RFID implementation in the fashion industry, extend this prototype by a discrete event simulation, and discuss the impact of an Electronic Product Code (EPC)-enabled supply chain concerning higher visibility. Thereby, we illustrate the benefit of the EPC network for Supply Chain Event Management (SCEM). Future researchers are provided with the simulation data which is available online and can be investigated.
8412425
A probabilistic sonar sensor model for robust localization of a small-size blimp in indoor environments using a particle filter
In recent years, autonomous miniature airships have gained increased interest in the robotics community. This is due to their ability to move safely and hover for extended periods of time. The major constraints of miniature airships come from their limited payload which introduces substantial constraints on their perceptional capabilities. In this paper, we consider the problem of localizing a miniature blimp with lightweight ultrasound sensors. Since the opening angle of the sound cone emitted by a sonar sensor depends on the diameter of the membrane, small-size sonar devices introduce the problem of high uncertainty about which object has been perceived. We present a novel sensor model for ultrasound sensors with large opening angles that allows an autonomous blimp to robustly localize itself in a known environment using Monte Carlo localization. As we demonstrate in experiments with a real blimp, our novel sensor model outperforms a popular sensor model that has in the past been shown to work reliably on wheeled platforms.
41952008
Understanding User Preferences and Awareness: Privacy Mechanisms in Location-Based Services
Location based services (LBS) let people retrieve and share information related to their current position. Examples are Google Latitude or Panoramio. Since LBS share user-related content, location information etc., they put user privacy at risk. Literature has proposed various privacy mechanisms for LBS. However, it is unclear which mechanisms humans really find useful, and how they make use of them. We present a user study that addresses these issues. To obtain realistic results, we have implemented a geotagging application on the web and on GPS cellphones, and our study participants use this application in their daily lives. We test five privacy mechanisms that differ in the awareness, mental effort and degree of informedness required from the users. Among other findings, we have observed that in situations where a single simple mechanism does not meet all privacy needs, people want to use simple and sophisticated mechanisms in combination. Further, individuals are concerned about the privacy of others, even when they do not value privacy for themselves.
16767565
Improving supply chain visibility through RFID data
In our work, which is still in progress, we examine the visibility potentials of RFID technology within the context of Supply Chain Management (SCM). This analysis is conducted systematically by matching identified SCM visibility requirements and general RFID visibility potentials. Building on a four-step approach, we show how visibility in supply chains can be improved on the basis of RFID-generated data, and what impact this increase in visibility has on the goals of SCM.
9477654
An Aggregating Discovery Service for the EPCglobal Network
Although the achievements of EPCglobal standardization efforts in the last years are substantial and the diffusion of the EPCglobal network continues, a service to access item-level information stored at potentially unknown supply chain partners is still missing. Without this 'Discovery Service' the EPCglobal network cannot be used with unknown business partners. In this contribution we present a novel Discovery Service approach. In contrast to other Discovery Service approaches we use the Discovery Service to aggregate the data of interest. This eliminates problems other approaches cannot solve, e.g. assuring data ownership, low access control maintenance effort, and minimal complexity for the information requester. We present a requirements model, describe the implementation of our Discovery Service approach, and compare it to existing Discovery Service approaches. Finally we show how to overcome scalability challenges to implement our Discovery Service approach in a real-world environment.