http://dl.gi.de/handle/20.500.12116/25479 2026-07-21T13:45:49Z http://dl.gi.de/handle/20.500.12116/25699 Toward Collaborative LCA Ontology Development: a Scenario-Based Recommender System for Environmental Data Qualification Takhom , Akkharawoot; Ikeda, Mitsuru; Suntisrivaraporn, Boontawee; Supnithi, Thepchai Johannsen, Vivian Kvist; Jensen, Stefan; Wohlgemuth, Volker; Preist, Chris; Eriksson, Elina This paper describes a collaborative approach to ontology development for data qualification for life cycle assessment by taking into consideration the Life Cycle Inventory (LCI) and Data Quality Indicator (DQI). The developed ontology is integrated with rule-based knowledge, to provide userdefined policies for LCI based on DQI. An ontology application management framework is developed to provide a collaborative environment for knowledge engineers and domain experts to define the knowledge explication and recommendation rules based on usage scenario. LCI data from agricultural domain is collected, and mapped to the knowledge base. To demonstrate the advantage of transformed rules, a scenario-based recommender system is built on top of the ontology, and carries out data quality measurement. 2015-01-01T00:00:00Z http://dl.gi.de/handle/20.500.12116/25701 Energy matters in buildings: Individual and collective issues Denward, Marie; de Jong, Annelise; Olsen, Rebekah Johannsen, Vivian Kvist; Jensen, Stefan; Wohlgemuth, Volker; Preist, Chris; Eriksson, Elina The number of Internet-enabled end-user devices such as personal computers, notebooks, tablets, smartphones, etc. is increasing constantly. However, since the devices themselves are becoming ever more energy-efficient, their overall energy consumption in the use phase of their life cycle seems to be increasing only marginally, or even decreasing in some areas. In contrast, the energy consumption induced in data centers by the use of end-user devices is rising. The present contribution presents the results of a Borderstep Institute study on the development of personal computers conducted within the framework of the research project AC4DC. Data was gathered on the number of workplace computer solutions in German businesses, the computers energy consumption, as well as the energy consumption in data centers they induced. In 2014, electricity consumption in data centers induced by end-user devices amounted to between 17 and 49 kWh per end-user device and year. The contribution compares the results of this study with the data from a 2010 survey and projects the global significance of the use of Internet-enabled end-user devices on the energy consumption of data centers. 2015-01-01T00:00:00Z http://dl.gi.de/handle/20.500.12116/25698 The Citizen Field Engineer: Crowdsourced Maintenance of Connected Water Infrastructure. Scenarios for smart and sustainable water futures in Nairobi, Kenya von Heland, Fanny; Nyberg, Marcus; Bondesson, Anna; Westerberg, Pontus Johannsen, Vivian Kvist; Jensen, Stefan; Wohlgemuth, Volker; Preist, Chris; Eriksson, Elina Sustainable water supply is a profound problem in slums in Nairobi, Kenya. Smart water management that integrates information and communication technology (ICT) to monitor water resources, diagnose problems, improve efficiency and coordinate management can help to overcome supply challenges as well as strengthen public participation in governance. This study applies scenario planning methodology to analyze the potential of a novel smart water concept, Citizen Field Engineer, to address water challenges in Nairobis slums, for example problems with water pollution and intermittent supply. The concept combines multi-functional sensors to monitor water supply with an innovative ICT-based governance model where residents in the local community are employed as service engineers. Looking at how this concept would apply in Nairobis slums, the scenario analysis suggests that the concept could potentially help to improve water availability, affordability and quality, including gender equality as women bear the main responsibility for collecting water. The analysis also suggests that an implementation of the concept could have a positive impact on childrens school attendance as water related diseases are an important factor behind low educational attainment. The study concludes that smart water management that integrates ICT is an important step to address challenges around sustainable water supply. 2015-01-01T00:00:00Z http://dl.gi.de/handle/20.500.12116/25700 Energy demand of workplace computer solutions - A comprehensive assessment including both end-user devices and the power consumption they induce in data centers Hintemann, Ralph; Fichter, Klaus Johannsen, Vivian Kvist; Jensen, Stefan; Wohlgemuth, Volker; Preist, Chris; Eriksson, Elina The number of Internet-enabled end-user devices such as personal computers, notebooks, tablets, smartphones, etc. is increasing constantly. However, since the devices themselves are becoming ever more energy-efficient, their overall energy consumption in the use phase of their life cycle seems to be increasing only marginally, or even decreasing in some areas. In contrast, the energy consumption induced in data centers by the use of end-user devices is rising. The present contribution presents the results of a Borderstep Institute study on the development of personal computers conducted within the framework of the research project AC4DC. Data was gathered on the number of workplace computer solutions in German businesses, the computers energy consumption, as well as the energy consumption in data centers they induced. In 2014, electricity consumption in data centers induced by end-user devices amounted to between 17 and 49 kWh per end-user device and year. The contribution compares the results of this study with the data from a 2010 survey and projects the global significance of the use of Internet-enabled end-user devices on the energy consumption of data centers. 2015-01-01T00:00:00Z