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First International Conference on Resource Efficiency in Interorganizational Networks - ResEff 2013 -
Renewable raw materials are becoming increasingly important as an alternative resource base in industrial networks. Consequently, research for methods improving the efficient use of renewable resources in production processes with by-products is crucial. The aim is cascade utilization, thus the multiple utilization of a raw material before its conversion into energy. The International Conference on Resource Efficiency in Interorganizational Networks (ResEff) brings together interdisciplinary researchers developing strategies and solution concepts for efficient resource utilization. It is therefore a platform for scientific exchange both between experts as well as interdisciplinary groups from agricultural and forestry science, mathematical optimization, operations research, marketing, business informatics, production and logistics. The following facets of the challenging topic of resource efficiency in interorganizational networks are covered: Materials, technologies, planning of production and value-added networks for renewable resources as well as governance, coordination and sale of products from renewable resources.
Optimization of Biomass-to-Liquid Plant Setups and Capacity Using Nonlinear Programming
Potentially rising oil prices caused by an increasing relative scarcity of mineral oil have farreaching consequences for the transportation sector, the chemical industry and mineral oil companies in particular. As national laws in Germany require biofuels to be mixed into conventional fuel to an increasing extend (BioKraftQuG 2009), mineral oil companies need to identify economically competitive as well as technically feasible biofuel production processes to meet these requirements. A first generation of biofuels was introduced on a large scale but has been criticized for competing with the agricultural production of food and for yielding relatively modest quantities of fuel per hectare of a...
Supply Planning for Processors of Agricultural Raw Materials
Renewable resources are rapidly gaining importance as alternative raw materials for industrial production. Supply planning with agricultural raw materials poses several challenges to processors. These challenges include seasonal availability, uncertain harvest quality and quantity as well as uncertain commodity market prices. In this work, decision support based on stochastic programming is developed to optimize supply planning of processors of agricultural raw materials given industrial requirements for material use. The approach depicts uncertain parameter values with probability distributions and maximizes the expected profit. Two examples are used to illustrate possible applications: supply planning for a processor of linseed and for a seed company. As stochastic programs can be adapted quickly, this approach can be applied to other supply planning decisions in bio-based supply chains.
Modeling of a logistics network for wood flows from by-products and cascade utilization
Waste Wood and wood by-products have the potential to become attractive alternative sources of raw materials. Their efficient use is important due to the rising demand and limited supply of forest wood. Cascade utilization is gaining interest as a strategy to bridge the gap between rising wood demand and fresh wood availability. However, the economic and environmental impacts of a cascading system for wood-based products are not fully known. In this work, an investigation is conducted to determine the consequences of cascade utilization for the economic and environmental performance of logistics networks for wood flows. Two case studies in Lower Saxony consider five wood products, including ...
Bioenergie im Spannungsfeld
The challenge of this interdisciplinary research on sustainable bioenergy production in rural areas is how to reconcile the chances and risks of bioenergy production within the context of climate stabilization, resource conservation, biodiversity, water, air, and soil preservation, the interests of society and of farmers. To answer this we developed and improved evaluation criteria and methods for a bioenergy implementation in rural areas. We show that the problems arising from energy plant production such as monoculture, changes of landscape and land use competition, loss of biodiversity, costs, social denial etc. may be eliminated during workshops with the main stakeholders (farmers, techn...
Entwicklung eines Netzwerk-Standort-Modells für die ökonomische Optimierung lokaler Nahwärmesysteme
In der vorliegenden Dissertation wird ein gemischt-ganzzahliges lineares Programm (MILP – mixed integer linear program) zur simultanen Optimierung von Nahwärmenetzen, Kraftwerkskapazitäten und –standorten vorgestellt. Unter gegebenen Rahmenbedingungen ermittelt das Programm die optimale Konfiguration eines Nahwärmenetzes unter Berücksichtigung der anzuschließenden Haushalte, der potentiellen Leitungsstücke sowie der Standorte und Kapazitäten der notwendigen Kraft-Wärme-Kopplungs-Anlagen. Damit lassen sich Planungssituationen für lokale Nahwärmesysteme inklusive der möglichen Förderung durch staatliche Subventionen realistisch abbilden. Das Modell wird im Rahmen der Arbeit auf...
Metallobiolomics
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Das Lesen der Anderen: Die Wahlverwandtschaft in der DDR- Literatur als Emanzipationsakt
Es handelt sich bei diesem Buch um eine grundlegende Studie über den Umgang mit dem kulturellen Erbe in der SBZ/DDR wie dem gesamten Ostblock. Speziell wird die Romantik thematisiert, die aus dem sogenannten Erbekanon getilgt werden sollte. Dem haben sich Autoren wie etwa Günter Kunert, Gerhard & Christa Wolf, Franz Fühmann, Günter de Bruyn u.a. entgegengestellt, indem sie Romantiker in persona zu Literatur des 20. Jahrhunderts gemacht haben. In diesem Rahmen verfassten sie Gedichte, Erzählungen, Biographien, Essays etc. – hierin ist ein mutiger Emanzipationsakt gegen die gängige Kulturpolitik zu sehen, der mit persönlichen Risiken verbunden war, etwa der (offiziell nicht vorhandene...
