Logo des Repositoriums

Auflistung nach Autor:in "Klafft, Michael"

1 - 6 von 6
  • Konferenzbeitrag
    Challenges in designing and distributing a not for profit first aid app worldwide
    (Informatik 2016, 2016) Klafft, Michael; Said, Maurice; Anson, Susan; Watson, Hayley; Hughes, Amanda; Lukau, Eridy
  • Konferenzbeitrag
    Challenges in investing into alerting systems under budgetary and geographical constraints
    (Environmental Infomatics - Stability, Continuity, Innovation: Current trends and future perspectives based on 30 years of history, 2016) Klafft, Michael
  • Workshopbeitrag
    Communicating storm surge risks via risk communication websites: a novel approach 
    (Mensch und Computer 2019 - Workshopband, 2019) Klafft, Michael; Strangmann, Larissa; Fianke, Marcel
    Websites related to storm surge risks mostly follow an instructive approach, often combining flood risk maps with historical information on floods, and instructions on how to behave in case of an approaching emergency, such as a dike break. Sometimes, these websites are enriched with additional media materials (photos in particular). However, while accurately representing flood risks in a matter-of-fact style, these websites neither highlight what such disasters actually mean for the everyday lives of the people concerned, nor do they appeal to the visitor's emotions - which is known to support the learning and personalization process related to the risk communicator's message. Therefore, the authors provide a concept for a risk communication website that combines oral history gathered via local citizen science projects with a reflection of flood disasters in the arts.
  • Konferenzbeitrag
    Information and interaction needs of vulnerable groups with regard to disaster alert apps
    (Mensch und Computer 2016 – Workshopband, 2016) Klafft, Michael; Reinhardt, Niklas
    In recent years, disaster management agencies introduced alert apps in order to inform the population in case of disasters. Initially, app design was focused on the average citizen and his or her information and interaction needs. However, vulnerable population groups need additional information or may have specific interaction requirements due to various types of impairments. This paper discusses how the needs of different vulnerable groups can be addressed. It also analyzes the suitability of an off-the-shelf disaster alert app for deaf people by presenting results of an exploratory field test.
  • Zeitschriftenartikel
    Reverse procurement and auctions for consumers
    (Wirtschaftsinformatik: Vol. 48, No. 1, 2006) Klafft, Michael; Spiekermann, Sarah
    Executive SummaryWeb-based bid invitation platforms and reverse auctions are increasingly used by consumers for the procurement of goods and services. An empirical examination shows that with B-2-C these procurement methods generate considerable benefits for the consumer:⊎ Reverse auctions and bid invitation platforms generate high consumer surplus in the procurement of general and crafts services.⊎ The level of this consumer surplus is affected by the number of bidders. The duration of the auction and the starting price are less important.⊎ In the painting business prices are considerably lower than with traditional procurement channels.⊎ On bid invitation platforms, in most cases (> 55%) the bids with the lowest price are chosen.AbstractWeb-based reverse auctions and bid invitation platforms have been used successfully for the procurement of goods and services in B-2-B and B-2-G contexts for some time. More recently, such procurement tools have become available to consumers and are increasingly gaining in popularity. An empirical examination of more than 1400 bid invitations and over 1100 reverse auctions shows that these two types of platforms generate noteworthy consumer surpluses, with the number of bidders being by far the most relevant factor in the determination of surplus levels. Contrary to traditional auction environments like eBay, auction duration and starting prices turn out to be of little relevance for consumer surpluses, as correlation and regression analyses show. The analysis of procurement data further reveals that consumer-driven platforms are particularly suitable for purchases of crafts and services where they provide an efficient mechanism to bring together buyers and sellers and match supply and demand. An exemplary review of results from painting auctions indicates that the price level achieved by consumers in reverse e-procurement is below reference prices which can be obtained in traditional procurement channels. Being an attractive alternative, reverse e-procurement platforms could bring about a paradigm shift towards buyer-centred e-purchasing.
  • Workshopbeitrag
    Towards a general methodology to assess the ease of use of public safety applications and crisis communications services
    (Mensch und Computer 2023 - Workshopband, 2023) Lukau, Eridy; Hellriegel, Janine; Klafft, Michael
    Ever since Davis’ Technology acceptance model for information technology has been introduced in the 1980ies, ease of use has been identified as a key determinant of people’s willingness to use information systems. This factor is particularly relevant for information and communication technology (ICT) for disaster situations, where users are under severe stress, potentially in danger, and have to cope with adverse conditions such as partial or complete breakdowns of infrastructure, power blackouts, and network congestions. The impact of such adverse conditions show that ease of use of ICT for disaster management and crisis communication is not only determined by the characteristics of the user interface, but also substantially impacted by properties of the backend and the infrastructure, such as its resilience and availability. This paper proposes a generalized metric for a holistic assessment of public safety systems and services for disaster management as well as emergency and crisis communication. This metric can be used to compare different ICT alternatives and to extend existing qualitative and quantitative approaches such as thinking aloud, focus groups, surveys and field tests by specifically addressing the unique aspects of a disasters which are difficult to simulate in trials and difficult to assess in interviews and surveys, in particular if a newly developed system or technology has never been used in a real disaster setting so far.1