TY - JOUR A1 - Aghamiri, Kathrin A1 - van Rießen, Anne T1 - Das Recht auf Teilhabe thematisieren JF - Sozial Extra: Rechtebasierte Kinder- und Jugendhilfe KW - Kinderrechte KW - Teilhabe KW - Heimerziehung KW - institutionelles Wohnen Y1 - 2023 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:836-opus-170726 VL - 2023 IS - 47 (2) SP - 84 EP - 87 ER - TY - JOUR A1 - Basler, Felix A1 - Mähner, Dietmar A1 - Fischer, Oliver A1 - Hilbig, Harald T1 - Influence of early-age vibration on concrete strength JF - Structural Concrete N2 - This report examines the strength of young and early age concrete that has been systematically exposed to horizontal, sinusoidal vibrations with varying vibration parameters. Specimens were subjected to vibrations of predefined vibration times (4–14 h) and the compressive strength was determined after a period of 28 days. It was found that the different parameters have no critical influence on compressive strength and that vibration prior to initial setting of the concrete can increase its strength. Additional information to examine the reasons for this increase was obtained by further investigations (nuclear magnetic resonance, x-ray diffraction, and thermogravimetric analysis). KW - compressive strength KW - early-age concrete KW - green concrete KW - vibrations KW - young concrete Y1 - 2023 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:836-opus-172052 SN - 1464-4177 SP - 6505 EP - 6519 ER - TY - JOUR A1 - Baumeister, Anna A1 - Gardemann, Joachim A1 - Fobker, Manfred A1 - Spiegler, Verena A1 - Fischer, Tobias T1 - Short-Term Influence of Caffeine and Medium-Chain Triglycerides on Ketogenesis: A Controlled Double-Blind Intervention Study JF - Hindawi Journal of Nutrition and Metabolism N2 - Background. Ketone bodies are a highly relevant topic in nutrition and medicine. -e influence of medium-chain triglycerides (MCT) on ketogenesis is well known and has been successfully used in ketogenic diets for many years. Nevertheless, the effects of MCTs and coconut oil on the production of ketone bodies have only partially been investigated. Furthermore, the increased mobilisation of free fatty acids and release of catabolic hormones by caffeine suggest an influence of caffeine on ketogenesis. Methods. In a controlled, double-blind intervention study, seven young healthy subjects received 10mL of tricaprylin (C8), tricaprin (C10), C8/C10 (50% C8, 50% C10), or coconut oil with or without 150 mg of caffeine, in 250mL of decaffeinated coffee, over ten interventions. At baseline and after every 40 minutes, for 4 h, ßHB and glucose in capillary blood as well as caffeine in saliva were measured. Furthermore, questionnaires were used to survey sensory properties, side effects, and awareness of hunger and satiety. Results. -e interventions with caffeine caused an increase in ßHB levels—in particular, the interventions with C8 highly impacted ketogenesis. -e effect decreased with increased chain lengths. All interventions showed a continuous increase in hunger and diminishing satiety. Mild side effects (total � 12) occurred during the interventions. Conclusions. -e present study demonstrated an influence of caffeine and MCTon ketogenesis. -eaddition of caffeine showed an additive effect on the ketogenic potential of MCT and coconut oil. C8 showed the highest ketogenicity. KW - Ketogenesis KW - Caffeine Y1 - 2021 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:836-opus-138069 VL - Volume 2021, Article ID 1861567 SP - 1 EP - 9 ER - TY - JOUR A1 - Blömker, Jan A1 - Albrecht, Carmen-Maria T1 - Psychographic segmentation of multichannel customers: investigating the influence of individual differences on channel choice and switching behavior JF - Journal of Retailing and Consumer Services N2 - This study investigates the role of individual differences in channel choice and switching behavior in a multichannel environment using latent class analysis on data from 1512 customers. Psychographic variables from five domains (risk attitudes, cognitive ability, motivation, personality, and decision-making style) serve as covariates for multichannel customer behavior. We identify six segments that differ significantly on six psychographic variables (readiness to take risks, need for cognition, autotelic and instrumental need for touch, and rational and intuitive decision-making styles). The results advance the theory-building of multichannel customer behavior and present insights for proactively managing customer journeys of distinct segments. KW - Multichannel customer behavior KW - Customer journey KW - Individual differences Y1 - 2024 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:836-opus-178965 VL - 79 SP - 1 EP - 17 ER - TY - JOUR A1 - Borghoff, Lisa Marie A1 - Strassner, Carola A1 - Herzig, Christian T1 - Organic Juice Processing Quality from the Processors’ Perspective: A Qualitative Study JF - foods N2 - Organic food quality is based on processing. While the EU organic production regulation focuses on agricultural production, private standards provide more detailed information about further processing. For the development of organic processing, practitioner perspectives can provide valuable input. To get insight into practitioner perspectives, we conducted semi-structured expert interviews with nine employees of seven partly organic juice processing companies from Germany and Austria. Interview topics were (i) quality of organic juice processing in general, (ii) assessment of specific processing techniques, (iii) product quality of organic juice and (iv) flow of information between producer and consumer. We conducted a thematic analysis. We found that the experts’ understanding of process quality mostly includes more aspects than the EU organic production regulation. It covers the whole food chain plus aspects of social and environmental sustainability. The experts prefer directly bottled juice of local raw materials but chiefly accept juice made from concentrate of exotic raw materials because of environmental concerns. Organic juice is preferred when it is cloudy and natural fluctuations are interpreted as an indicator of natural quality. The experts report that consumer information is challenging because of low food literacy. Raising this might help reduce the number of processed juices on the market. KW - organic food processing KW - organic food quality KW - juice processing KW - expert interviews KW - Germany Y1 - 2023 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:836-opus-156994 SP - 1 EP - 18 PB - MDPI ER - TY - JOUR A1 - Borghoff, Lisa Marie A1 - Strassner, Carola A1 - Herzig, Christian T1 - Processors' understanding of process quality: a qualitative interview study with employees of organic dairies in Germany and Switzerland JF - British Food Journal N2 - Purpose: Organic food processing must include organic principles to be authentic. This qualitative study aims to understand the processors' understanding of organic food processing quality. Design/methodology/approach: This study is based on semi-structured expert interviews with eight employees of six purely or partly organic dairies from Germany and Switzerland. Interview themes are (1) quality of organic milk processing in general, (2) assessment of specific processing techniques, (3) product quality of organic milk and (4) flow of information between producer and consumer. The interviews have been audio-recorded, transcribed verbatim and thematically analysed. Findings: (1) Experts prefer minimal processing; some prefer artisanal processing, whilst others stress the advantages of mechanisation. (2) High temperature short time (HTST) pasteurisation and mechanical processing techniques are accepted; ultra-high-temperature (UHT) milk processing is partly rejected. (3) Traditional taste and valuable ingredients should be present in the final product. Natural variances are judged positively. (4) Consumers' low level of food technology literacy is challenging for communication. Research limitations/implications: The results cannot be generalised due to the qualitative study design. Further studies, e.g. qualitative case analyses and studies with a quantitative design, are necessary to deepen the results. Practical implications: The paper shows which processing technologies experts consider suitable or unsuitable for organic milk. The paper also identifies opportunities to bridge the perceived gap between processors' and consumers' demands. Originality/value: The study shows the challenges of processors in expressing the processors' understanding of process quality. KW - organic milk processing KW - quality perception KW - expert interviews KW - qualitative text analysis Y1 - 2023 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:836-opus-157019 SN - 0007-070X SP - 1 EP - 32 PB - Emerald Publishing ER - TY - JOUR A1 - Bredehöft, Claas T1 - Environmental impacts of tidal power plants - Current status of the environmental impacts of conventional tidal power plants JF - Educational Journal of Renewable Energy Short Reviews N2 - Meanwhile, renewable energy sources such as hydropower, solar and wind energy and biomass are increasingly being used to reduce dependence on fossil fuels and thus counteract the ongoing global warming. However, these are also associated with environmental impacts. To that effect, this article takes a closer look at tidal power plants, which are classified as hydroelectric power plants, by conducting a systematic literature review. The results show that the strength and form of the environmental impact depends on the specific location and type of plant. Tidal power plants have an impact on the habitats of marine animals and thus influence their behavior and population. In addition, the operation of tidal power plants changes the sediment distribution, causes a reduction in current velocities and a change in current direction in the surrounding area and leads to a change in wave height. The construction of the power plants is associated with noise, which primarily causes changes in the behavior of some species. Furthermore, the electromagnetic fields generated can also affect marine life. In order to assess the environmental impact of tidal power plants in comparison to other renewable energies, further studies should focus on the environmental impact of the different technologies in relation to the energy yield. T3 - EGU Master Journal of Renewable Energy Short Reviews - 2024_01 KW - tidal power plants KW - environmental impacts KW - tidal barrage KW - tidal stream KW - hydropwer plants Y1 - 2024 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:836-opus-176379 SP - 3 EP - 8 ER - TY - JOUR A1 - Bresgott, Jannes T1 - How can artificial intelligence be used to find areas for wind turbines and solve other challenges associated with wind energy? JF - Educational Journal of Renewable Energy Short Reviews N2 - This article discusses the use of artificial intelligence in the wind energy industry, particularly in addressing challenges and optimizing the expansion of renewable energies in Germany. It highlights the application of artificial intelligence in wind forecasts and yield predictions, bird detection, wind turbine and farm design, condition monitoring, and predictive maintenance. Additionally, it introduces the “WindGISKI” research project, which aims to use artificial intelligence to identify new areas for wind turbines. The project utilizes a neural network to analyze and predict flight routes, potentially reducing bird mortality. The document also emphasizes the potential broader applications of “WindGISKI” in other fields of activity, such as land use planning and city development. Overall, it underscores the significant role of artificial intelligence in addressing challenges in wind energy and outlines the potential for artificial intelligence to drive the expansion of renewable energies while addressing key obstacles. T3 - EGU Master Journal of Renewable Energy Short Reviews - 2024_02 KW - wind turbine KW - WindGISKI KW - artificial intelligence Y1 - 2024 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:836-opus-176393 SP - 9 EP - 13 ER - TY - JOUR A1 - Breuckmann, Michael A1 - Wacker, Georg A1 - Hanning, Stephanie A1 - Otto, Matthias A1 - Kreyenschmidt, Martin T1 - Quantification of C, H, N and O in polymers using WDXRF scattering spectra and PLS regression depending on the spectral resolution JF - Journal of Analytical Atomic Spectrometry N2 - A new approach to determine the elements carbon, hydrogen, nitrogen and oxygen (CHNO) in polymers by wavelength-dispersive X-ray fluorescence analysis (WDXRF) in combination with partial least squares (PLS) regression was explored. The quantification of CHNO was achieved by using the Rayleigh and Compton scattering spectra of an Rh X-ray tube from 84 different polymers. Concealed differences of the corresponding scattering spectra could be utilized to quantify CHNO in a multivariate manner. It was shown that the developed model was capable of determining these commonly non-measurable matrix elements in polymers using WDXRF. Furthermore, the influence of spectral resolution, which is given by the collimator and the crystal, on the prediction of CHNO was explored in this study. It was found that minimal spectral resolution led to the most accurate CHNO predictions. Information about matrix composition could be used to improve so-called semi-quantitative XRF methods based on fundamental parameters (FP) for the analysis of plastics, soil or other samples with high organic content. KW - X-ray fluorescence KW - Plastics KW - Quantification of "dark matrix" elements KW - PLS regression Y1 - 2022 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:836-opus-149252 SN - 1364-5544 ER - TY - JOUR A1 - Brinkschmidt, Florian T1 - Technologies for structural health monitoring of wind turbine blades - An overview of different techniques JF - Educational Journal of Renewable Energy Short Reviews N2 - Wind turbine structures take a major role in the modern conversion to renewable energy sources and contribute to the creation of a greener world. In recent years, the development and installation of wind turbines have seen rapid growth. However, with the increasing capacity and size of wind farms worldwide, there are growing concerns about the safety and reliability of these installations. Therefore, structural health monitoring and the detection of damage to wind turbines have gained considerable importance in research. Wind turbine blades are particularly susceptible to various types of damage due to environmental influences. This article provides an overview of signal responses, sensors used and non-destructive testing techniques in the field of damage detection on wind turbine blades. The intention of the article is to give an insight into the possibilities of structural health monitoring and at the same time to point out unsolved problems in this field. T3 - EGU Master Journal of Renewable Energy Short Reviews - 2024_03 KW - structural health monitoring KW - wind turbine blades KW - damage detection KW - measurement KW - non-destructive testing Y1 - 2024 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:836-opus-176401 SP - 14 EP - 21 ER -