The 20 most recently published documents
In recent years Indonesia has been confronted with an excessive generation of municipal solid waste (MSW), predominantly present in the form of organic refuse. While moving towards integrated solid waste management (ISWM) is an important strategy used to control its generation, it is also now recognized that economic approaches need to be promoted as well in order to tackle the problem concertedly. In this case study, empirical approaches are developed to understand how market instruments could be introduced into environmental services and how to apply co-benefit approach in a green economy paradigm for Indonesia. We investigate the feasibility of introducing market instruments in Indonesia by appliying local co-benefit initiatives adapted from German experiences in integrating market instruments into MSW management practices. Currently co-benefit activities are undertaken in the Sukunan village (Yogjakarta) to promote waste composting using market incentives in the framework of community-based solid waste management (CBSWM). This scheme aims at reducing MSW generation at its source and mobilizing people to be involved in waste separation (organic and non-organic) at household levels. As a result, about 200,000 t of CO2 emissions could be successfully reduced annually. By integrating market instruments into waste management practices, the result of our studies sugggests that Indonesia could make positive changes to its environmental policy and regulation of MSW at local levels. The country's policymakers have played important roles in promoting the effectiveness of urban development with co-benefits approaches to facilitate its transition towards a green eccnomy.
This paper summarises the experiences with sustainability reporting in a very wide meaning at Universities of Applied Sciences (UoAS). It focuses on the communication of sustainability aspects and activities of universities. It provides a recommendation, a model for communicating the sustainability activities of universities and emphasises the values of this appraoch. This paper aims to find the most effective ways to convey education for sustainable development to a broad public and initiate communication about sustainability aspects with society.
The paper is based on action research done at two universities about the ways in which academic institutions can communicate with their stakeholders in order to report about their own role as a responsible university and also to make an impact on the sustainable development on a local and global scale.
Research is focussed on experiences at Universitites of Applied Sciences with their strong focus on applied research, education and transfer. However, these results can be helpful for each academic institution that wants to make a positive impact on society. The concept which we present focusses on the possible impact which universities can generate.
Seen as the contribution to the research field of sustainabitliy reporting the paper points out that a continuous qualitative reporting process with a focus on education for SD is an adequate and efficient approach to sustainability reporting for universities and an effective way to reach a broad public.
We show that there are several efficient methodss of communication ranging from the traditional sustainability report to publications which address the public and to more innovative methods using the web 2.0. We show and argue that for universities, alternative ways of sustainability communication may be more effective to achieve the sustainability mission.
The concept which we present gives the universities a broader impact on society and helps them to support sustainable development in an efficient way.
Cleanable bag filter : comparisons of different testing methods of ageing of filter materials
(2019)
Cleanable bag filters are used to separate dust and other airborne particulate systems. Due to typical process conditions, they are subject to thermal, chemical and mechanical stress during use. The main objective of the IGF project no. 18307 "Investigation of the chemical and thermal degradation of cleanable filter media and improvement of their resistance by surface modification", was the development of a valid test method which can reproduce degradation caused by high temperatures and aggressive chemical atmospheres in a practice-oriented but time-saving manner. Within the IGF project, 2 accelerated ageing methods were applied, both of which have the decisive advantage of investigating damage in the gas phase. Many resistances of filter materials are otherwise carried out by immersing the materials in a mostly liquid damage medium at a defined temperature. These resistances are difficult to transfer ageing in the gas phase.
Purpose: The purpose of this paper is to describe and discuss the current state of fashion business academic education worldwide. This is motivated by the wish to develop recommendations for the fashion business bachelor program of Reutlingen Uni versity.
Design/methodology/approach: This paper is based on a systematic review of relevant fashion business academic programs. A qualitative comparison is conducted through a categorization of the programs’ content and a score system evaluating the programs’ concepts.
Findings: Key findings were that several factors ensure successful fashion business education: Industry connections, international networks, project-based work, personalized career services and innovative approaches in teaching that include all steps along the fashion value chain.
Research limitations/implications: The research was primarily limited due to the limited number of schools assessed. As a result of the restricted time frame, those schools that were presented could only be analyzed regarding a few aspects. Future research should focus on a more in-depth analysis and further-reaching comparisons, e.g. comparisons with teaching concepts outside the fashion business area or with requirements by fashion companies.
After definition and the history of podcasts, in this book the role of podcasts in the communication strategy is mapped out. Podcast production, podcast types, podcast structures, and podcast advertising are explained. Podcast audiences and podcast in the fashion industry are introduced.
In a thorough explorative analysis, a general exploration of the podcast offering of the fashion sector was conducted. Then a selected podcast analysis with evaluation and conclusion, including a discussion of the future use of podcasts closes this book.
Digitale Selbstvermessungstechnologien wurden in den letzten Jahren zum Sinnbild rationaler und optimierter Lebensführung. Mit dem digitalen Prosumenten sind jedoch auch zahlreiche Pathologien verbunden. Der Beitrag verortet Lifelogging - digitalisierte Lebensprotokollierung - als auf Algorithmen basierende Form von Alchemie und Surrogat für echte soziale Utopien.
Usually battery chargers have two stages and DC charging current is considered to by necessary for a proper charging. To decrease the charger volume, a single stage LLC battery charger is investigated in this paper. PFC stage is eliminated, therefore no bulky capacitor is necessary any more, and battery is charged with a sinusoidal-like charging current. However, previous studies show that such a pulsating charging current has only minimal impact on battery life and efficiency. Design considerations of the resonant tank and optimal transformer design are presented. A 360W single stage LLC converter prototype for e-bike charger achieves a power factor of 0.98, efficiency of 0.93 and power density of 1,8kW/dm³.
Model-based hearing diagnosis based on wideband tympanometry measurements utilizing fuzzy arithmetic
(2019)
Today's audiometric methods for the diagnosis of middle ear disease are often based on a comparison of measurements with standard curves that represent the statistical range of normal hearing responses. Because of large inter-individual variances in the middle ear, especially in wideband tympanometry (WBT), specificity and quantitative evaluation are greatly restricted. A new model-based approach could transform today's predominantly qualitative hearing diganostics into a quantitative and tailored, patient-specific diagnosis, by evaluating WBT measurements with the aid of a middle-ear model. For this particular investigation, a finite element model of a human ear was used. It consisted of an acoustic ear canal and a tympanic cavity model, a middle-ear with detailed nonlinear models of the tympanic membrane and annular ligament, and a simplified inner-ear model. This model has made it possible to identify pathologies from measurements, by analyzing the parameters through senstivity studies and parameter clustering. Uncertainties due to the lack of knowledge, subjectivity in numerical implementation and model simplification are taken into account by the application of fuzzy arithmetic. The most confident parameter set can be determined by applying an inverse fuzzy method on the measurement data. The principle and the benefits of this model-based approach are illustrated by the example of a two-mass oscillator, and also by the simulation of the energy absorbance of an ear with malleus fixation, where the parameter changes that are introduced can be determined quantitatively through the system identification.
Die Wörz´sche Heuristik
(2019)
Melamine–formaldehyde (MF) resins are widely used as adhesives and finishing materials in the wood industry. During resin cure, either methylene ether or methylene bridges are formed, leading to the formation of a three‐dimensional resin network. Not only the curing degree, but also the chemical species present in the cured resin determine the quality of the final product. Analytical methods allowing a detailed investigation of network formation are of great benefit to manufacturers. In the present work, resin cure of an MF precondensate is studied at different temperatures (100–200 °C) without considering the initial pH as a factor. Isoconversional kinetic analysis based on exothermal curing enthalpies enables calculation of the crosslinking degree at a given time/temperature regime. A semiquantitative determination of the chemical groups present is performed based on solid‐state nuclear magnetic resonance data. Fourier transform infrared spectroscopy has shown to be a fast and reliable analytical tool with high sensitivity toward functional groups and with great potential for at‐line process control.
Systemtheorie für die Praxis : ein transdiziplinäres Modell systemischen Handelns mit Anwendungen
(2019)
Unser transdisziplinäres Modell systemischen Handelns verknüpft Grundideen soziologischer Systemtheorien mit Grundideen angrenzender Disziplinen so, dass es auf soziale Systeme aller Art angewendet werden kann. Die Bandbreite reicht von Zwei-Personen-Systemen über Profit- und Non-Profit-Organisation, Staaten und internationale Organisationen bis hin zur Weltgesellschaft. Solche Systeme interagieren untereinander sowie mit natürlichen und technischen Systemen, verändern dabei sich selbst und ihr Umfeld.
Das Handeln jedes sozialen Systems lässt sich mit Hilfe der sechs Dimensionen unseres Modells beschreiben, erklären und gestalten. Das zeigt schon die Leitfrage, zu der wir diese Dimensionen verdichten: Wer ist wo (System mit Subsystemen), wie präsent (Interpretationen), hat/kann (Ressourcen) und darf/soll (Institutionen) was wie transformieren (Prozesse) und mit wem wie interagieren (Interaktionen)? Diese Abstraktheit ermöglicht Anwendungen auf alle Systeme, in Verbindung mit passenden Konkretisierungen. Das verdeutlichen wir beispielhaft primär am Hochschulsystem.
A fully passive RFID temperature sensor SoC with an accuracy of ±0.4 ◦C (3σ) from 0 ◦C to 125 ◦C
(2019)
This paper presents a fully passive 13.56 -MHz RFID temperature sensor system-on-chip. Its power management unit operates over a large temperature range using a zero temperature coefficient bias source. On-chip temperature sensing is accomplished with low-voltage, low-power CMOS circuitry, and time-domain signal processing. Two readout commands have been defined to study supply noise sensitivity: 1) standard readout, where just a single set of data is transferred to the reader and 2) serial readout, where several sets of data are sent one after the other to the reader. With the standard readout command, the sensor suffers from interference from the RFID command packet and outputs interference as well, while the sensor outputs no interference with the serial readout command. Measurements show that sensor resolution with serial readout is improved by a factor of approximately 16 compared to standard readout. The chip was fabricated in a standard 0.35-μm CMOS technology and chip-on-board mounted to a tuned RFID transponder coil on an aluminum core FR4 PCB substrate. Real time wireless temperature sensing has been demonstrated with a commercial HF RFID reader. With a two-point calibration, the SoC achieves a 3σ sensing accuracy of ±0.4 ◦C from 0◦C to 125 ◦C.
100 Jahre nach der Gründung des Bauhauses betrete ich die Bauhaus Universität Weimar und frage mich, wie das wohl damals war? Vor 100 Jahren haben Gropius, Muche, Mies van der Rohe, Schlemmer und Itten Vorlesungen hier gehalten und jetzt bin ich dran. Wir schreiben Geschichte! Deren Geist weht immer noch in den original erhaltenen Gebäuden und Räumen. Bei der genaueren Betrachtung des Bauhauses, das Weltruhm erlangt hat, kann man einiges lernen. Beispielsweise lohnt die Überlegung, was das Marketing vom Bauhaus lernen kann.
It has not yet been possible to achieve the desired aim of decoupling economic growth from global material demand. Small and medium sized enterprises (SMEs) represent the backbone of most industrialized economies. Although material efficiency is of vital importance for many SMEs, few of them actually treat it as their top priority. There is a cornucopia of tools and methods available which can be used for material efficiency purposes. These, however, have gained little ground in the SME-field. This work deals with the enabling factors for material efficiency improvements in manufacturing SMEs and projections towards aspects of supply chain and circular economy. A multi-disciplinary decoupling approach for manufacturing SMEs and an implementation roadmap for further practical development are proposed. The approach combines appropriate complexity of technology and socio-economic considerations. It enables a connection of existing methods and the implementation of established information technologies.
