This thesis deals with the topic of energy storage in environmental education. One goal was to identify the unused potential in education about energy storage with the focus on accumulator. The researched area was limited to the Swiss-German part. Based on this analysis, two training courses followed at the gymnasium Solothurn and at the Science Week of the Zurich University of Applied Sciences in Wädenswil. The aim of these two trainings was to find out how the participants approached the topic and which content was suitable for the purpose of education. It turned out that the energy storage was never on focus of these existing courses. The potential for a new offer in this area is regarded as large.
Coccidia are monocellular parasites. They are prevalent worldwide and occur in the gastro-intestinal system and the liver of higher vertebrates. In some cases, they are highly pathogenic and can cause coccidiosis. Therefore coccidian are one of the most important harm factors in the keeping of farm animals. In conventional farming, the coccidia are fought by preventive medication. Since this is not allowed in organic farming, strict hygiene in the barn and a directed field management are there the strategies. The detection of coccidian in soil samples are vital for a directed field management. To establish a method for detection coccia of genus eimeria in soil samples is the content of this paper.
Habitat deterioration due to the intensification of agriculture led to a severe decline of the Eurasian Wryneck (Jynx torquilla) population in Switzerland from the 1950s to the 1990s. As a consequence, the Eurasian Wry-neck is today a potentially endangered species on the Red List and a priority species for conservation in Swit-zerland. This breeding bird of semi-open grassland habitats is dependent on 40 to 80 % bare ground and a large number of ants. The ants are eaten as larvae, pupae and imagines. Ants prefer open and structured greenland areas with mosaic-like vegetation-free areas, small islands of shrubs and versatile microhabitat. A new project of the Swiss Ornithological Institute and BirdLife Switzerland, in cooperation with local partners, aims to extend the distribution of Eurasian Wryneck from western Switzerland to the cantons of Bern, Solo-thurn and Aargau. However, food availability and food accessibility is still largely unknown in this region.
Clean, reliable energy is an important factor for any village or areas development. Despite this, 1.2 billion people had no access to electricity and 2.8 billion people relied on traditional biomass for cooking and heating in 2016 according to the International Energy Agency. One of the United Nations Sustainable Development Goals states that by 2030 everyone should have access to clean, sustainable energy. In light of this, the aim of this project was to design a methodological approach to appraise the energy situation in a Kyrgyz mountain village in order to make it possible for that village to work towards the energy targets of the Sustainable Development Goals in a clear, focused way. To do this, two surveys – a questionnaire and an observational survey - were developed that included all energy related topics such as reliability, affordability, availability, quality and cleanness of energy as well as energy efficiency, and percentage of renewable energies.
Human made green spaces have been a central part of our culture for many hundreds of years. Over the years their maintenance has changed. Today one can roughly distinguish two kinds of maintenance: conventional and natural. There are numerous studies made by cities and brochures recommending a natural greenery maintenance. They argue, that this will not only be an important benefit to biodiversity in urban areas, but will also create a higher-quality atmosphere and minimise costs. Still, the overall impression of green spaces remains conventional. It is the aim of this study to identify the motivation for natural maintenance in public and private green spaces. The findings can serve to convince professionals and individuals to do a more natural form of maintenance.
Natural floodplains are characterized by a heterogeneous habitat structure and a balanced distribution, which enable a high bio- and process diversity. If the flow rate and dynamics are decreasing in a river, and bed load is lacking, the ecological value of the floodplain can be reduced by the qualitative or quantitative loss of habitats for plants and animals. In this bachelor thesis, the spatial and temporal developments of the habitats on the Sarine watercourse below the Rossens dam (Kt. FR) were examined from their natural state in 1943 until 2013 as well as on a near-natural reference stretch of the Sense (Kt. FR/BE) based on historical aerial images. They were digitized in GIS and the habitats were assigned to one of eight classes. Subsequently, the relative habitat portions, habitat turnover and ecomorphological indicators were used to determine the complexity and changes of the floodplain system.
This thesis deals with the topic "Drinking water with PV electricity on the Wädenswiler mountain pumps" and explains the plant design for three reservoirs in the urban area of Wädenswil. The pumps in the plants are today operated at favorable low tariffs at night. By installing a photovoltaic system with the appropriate control, the pumps could follow the load and operate during the day. A battery could save the energy of the plants and the pumps could continue to be operated at night. The aim of the work is to investigate whether a realization of solar systems in a possible combination with storage or control solutions on the roofs of the pumping stations is energetically and economically useful. The work shows positive potential estimates for the reserve roofs and high consumption of the sites due to the high pump capacities.
The Precision Time Protocol (PTP) according to IEEE 1588 and its variants are increasingly being used as the basis for achieving accurate media clock distribution and synchronization in media networks. This article introduces the principles of PTP with a view towards media clock synchronization, and gives an overview of requirements for media clock distribution in a network. We show how PTP can be harnessed for reconstructing media clocks locally in each network node in such a way that those requirements can be met. We discuss different strategies for clock synthesis and distribution, their application area, and the impact on the implementation of a node. We finally discuss two existing media network frameworks (AVB and RAVENNA) which both utilize PTP for media clock synchronization, and analyze the commonalities and differences between them.
Redundancy protocols help to improve the availability of a network. Such protocols typically perform a reconfiguration of the network after a failure of a node or a link, i.e. a new network topology is computed and activated. Applications can’t communicate during this reconfiguration for several ten or hundred milliseconds, depending on the type of protocol and on the size and topology of the network. Demanding applications in the field of automation, transportation, and power distribution require mechanisms free of interruption, i.e. qualified as “with zero switchover time” or “bumpless”. An approach to realize bumpless redundancy is to transmit multiple copies of a frame over different independent paths at the same time. The receiver processes the copy arriving first and discards the duplicates. The standard IEC 62439-3 specifies two protocols based on this principle: the Parallel Redundancy Protocol (PRP) uses two independent LANs while the High-availability Seamless Redundancy (...
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