@article{SpangenbergLorek2022, author = {Spangenberg, Joachim H. and Lorek, Sylvia}, title = {Who cares (for whom)}, series = {Frontiers in Sustainability}, journal = {Frontiers in Sustainability}, publisher = {Frontiers Media}, doi = {10.25974/fhms-16067}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:836-opus-160675}, year = {2022}, language = {en} } @article{Kramer2024, author = {Kramer, Kevin}, title = {Water wheels for energy recovery in the outlet of wastewater treatment plants - Using the example of the water wheel at the Warendorf central wastewater treatment plant}, series = {Educational Journal of Renewable Energy Short Reviews}, journal = {Educational Journal of Renewable Energy Short Reviews}, doi = {10.25974/ren_rev_2024_05}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:836-opus-176423}, pages = {28 -- 32}, year = {2024}, abstract = {The annual wastewater flow that is treated by public wastewater treatment plants in Germany amounts to approx. 10 ∗ 10^9 m3/a and forms an "artificial" hydropower potential that can be used for energy generation or recovery. In the context of this paper, energy recovery in the outlet of wastewater treatment plants is examined using the specific example of the water wheel at the Warendorf central wastewater treatment plant. The "artificial" hydropower potential can be roughly estimated at up to 20 to 105 GWh/a , whereby this is largely dependent on the hydraulic gradient. The strong variance results, among other things, from the findings of the water wheel operation in Warendorf. The decisive aspect here is the differential factor, which describes the deviation between the theoretical and actual energy yield of the water wheel. The factor includes maintenance work, downtimes and insufficient inflows, which are associated with a loss of output. In the case study, the annual energy recovery amounts to approx. 2 \% of the annual electricity consumption of the wastewater treatment plant and can be estimated to 23,500 kWh (2022). In the context of the economic analysis, it can be seen that despite the "low" yield, economic operation is possible if the system is viewed as a long-term investment - payback period of the example is approx. 14,5 years. The 27-year operation (1996 - 2023) of the water wheel at the Warendorf central wastewater treatment plant confirms this and important findings on successful practical operation can be shown in the context of this paper.}, language = {en} } @article{KleckersAbadiBrandhermetal.2024, author = {Kleckers, Jonas and Abadi, Abbas and Brandherm, Katrin Marie and Haberkamp, Jens}, title = {Wastewater generation model to predict impacts of urine separation on wastewater treatment plants}, series = {Water Science \& Technology 89 (5)}, journal = {Water Science \& Technology 89 (5)}, issn = {0273-1223}, doi = {10.25974/fhms-17950}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:836-opus-179502}, pages = {1312 -- 1324}, year = {2024}, abstract = {Wastewater treatment plants (WWTPs) are under increasing pressure to enhance resource efficiency and reduce emissions into water bodies. The separation of urine within the catchment area may be an alternative to mitigate the need for costly expansions of central WWTPs. While previous investigations assumed a spatially uniform implementation of urine separation across the catchment area, the present study focuses on an adapted stochastic wastewater generation model, which allows the simulation of various wastewater streams (e.g., urine) on a household level. This enables the non-uniform separation of urine across a catchment area. The model is part of a holistic modelling framework to determine the influence of targeted urine separation in catchments on the operation and emissions of central WWTPs, which will be briefly introduced. The wastewater generation model is validated through an extensive sampling and measurement series. Results based on observed and simulated wastewater quantity and quality for a catchment area of 366 residents for two dry weather days indicate the suitability of the model for wastewater generation and transport modelling. Based on this, four scenarios for urine separation were defined. The results indicate a potential influence of spatial distribution on the peaks of total nitrogen and total phosphorus.}, language = {en} } @article{WinterBrandesMuelleretal.2010, author = {Winter, Corinna and Brandes, Mirko and M{\"u}ller, Carsten and Schubert, Tim and Ringling, Michael and Hillmann, Axel and Rosenbaum, Dieter and Schulte, Tim T.}, title = {Walking ability during daily life in patients with osteoarthritis of the knee or the hip and lumbar spinal stenosis}, series = {BMC Musculoskeletal Disorders}, volume = {11}, journal = {BMC Musculoskeletal Disorders}, number = {233}, doi = {10.25974/fhms-16867}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:836-opus-168673}, pages = {1 -- 7}, year = {2010}, abstract = {Background Degenerative musculoskeletal disorders are among the most frequent diseases occurring in adulthood, often impairing patients' functional mobility and physical activity. The aim of the present study was to investigate and compare the impact of three frequent degenerative musculoskeletal disorders -- knee osteoarthritis (knee OA), hip osteoarthritis (hip OA) and lumbar spinal stenosis (LSS) -- on patients' walking ability. Methods The study included 120 participants, with 30 in each patient group and 30 healthy control individuals. A uniaxial accelerometer, the StepWatch™ Activity Monitor (Orthocare Innovations, Seattle, Washington, USA), was used to determine the volume (number of gait cycles per day) and intensity (gait cycles per minute) of walking ability. Non-parametric testing was used for all statistical analyses. Results Both the volume and the intensity of walking ability were significantly lower among the patients in comparison with the healthy control individuals (p < 0.001). Patients with LSS spent 0.4 (IQR 2.8) min/day doing moderately intense walking (>50 gait cycles/min), which was significantly lower in comparison with patients with knee and hip OA at 2.5 (IQR 4.4) and 3.4 (IQR 16.1) min/day, respectively (p < 0.001). No correlations between demographic or anthropometric data and walking ability were found. No technical problems or measuring errors occurred with any of the measurements. Conclusions Patients with degenerative musculoskeletal disorders suffer limitations in their walking ability. Objective assessment of walking ability appeared to be an easy and feasible tool for measuring such limitations as it provides baseline data and objective information that are more precise than the patients' own subjective estimates. In everyday practice, objective activity assessment can provide feedback for clinicians regarding patients' performance during everyday life and the extent to which this confirms the results of clinical investigations. The method can also be used as a way of encouraging patients to develop a more active lifestyle.}, language = {en} } @inproceedings{MorgretFeldmannMatthies2024, author = {Morgret, Linda and Feldmann, Carsten and Matthies, Benjamin}, title = {Value Driver Trees for KPI-Based Decision Analytics: Process Performance in the Order-to-Delivery Process}, series = {Proceedings of the 57th Hawaii International Conference on System Sciences (HICSS)}, booktitle = {Proceedings of the 57th Hawaii International Conference on System Sciences (HICSS)}, isbn = {978-0-9981331-7-1}, doi = {10.25974/fhms-17513}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:836-opus-175131}, year = {2024}, language = {en} } @inproceedings{MesenhoellerJacobsVennemannetal.2022, author = {Mesenh{\"o}ller, Eva and Jacobs, Steffen and Vennemann, Peter and Hussong, Jeanette}, title = {Unsteady Ventilation in a Scaled Room Model with Swirl Ceiling Diffusers}, series = {CLIMA 2022 conference}, booktitle = {CLIMA 2022 conference}, publisher = {TU Delft OPEN}, address = {Delft}, doi = {10.25974/fhms-15181}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:836-opus-151811}, year = {2022}, abstract = {Mechanical ventilation of buildings is generally based on steadily operating systems. This field is well known and established. But, an approach based on time-varied supply flow rates might improve indoor air quality, comfort, and energy consumption. Typical time-scales of the variation are in the order of seconds or minutes. Until now, the effects of unsteady ventilation scenarios are not fully described and so, reliable dimensioning rules are missing. Hence, with a better understanding of the flow in unsteady ventilation, systems can be calculated and optimised. To understand the effective mechanisms and derive functional relations between the flow field and variation parameters, full-field optical flow measurements are executed with a particle image velocimetry (PIV) system. Experiments are conducted under isothermal conditions in water in a small-scale room model (1.00 m × 0.67 m × 0.46 m) with two swirl ceiling diffusers, Reynolds-scaling assures similarity. In a series of experiments, the effects of different unsteady ventilation strategies on the flow fields are investigated and compared to steady conditions with the same mean exchange rate. Mean exchange rates, signal types, periods, and amplitudes are varied. Time-averaged normalised velocity fields already indicate notable differences between steady and unsteady cases especially for lower exchange rates: the distribution is more homogeneous in unsteady scenarios compared to steady conditions, and low-velocity areas are reduced while the mean velocity of the room increases. So, unsteady ventilation might be beneficial in terms of improved ventilation and energy savings in partial-load operation. Fast Fourier Transformation (FFT) analyses of the mean velocity for each field over the whole series detect the main frequency of the volume flow variation. By dividing the velocity field into smaller areas, this main frequency is still detected especially in the upper part of the room, but side frequencies play a role in the room as well.}, language = {en} } @article{ReesKurtenbachRosenbergeretal.2022, author = {Rees, Yann P.M. and Kurtenbach, Sebastian and Rosenberger, Katrin and K{\"u}chler, Armin}, title = {Towards Digital Social Infrastructure? Digital Neighborly Connectedness as a Social Resource}, series = {Urban Planning}, journal = {Urban Planning}, publisher = {Cogitatio}, issn = {2183-7635}, doi = {10.25974/fhms-15409}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:836-opus-154096}, year = {2022}, language = {en} } @inproceedings{CarlKirillovHochmannetal.2023, author = {Carl, Ann-Kathrin and Kirillov, Maxim and Hochmann, David and Quadrat, Eric}, title = {Towards credible computational models: Application of a risk-based framework for establishing credibility}, series = {Transactions on Additive Manufacturing Meets Medicine}, booktitle = {Transactions on Additive Manufacturing Meets Medicine}, issn = {2699-1977}, doi = {10.25974/fhms-17382}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:836-opus-173821}, year = {2023}, abstract = {The use of computational modeling and simulation (CMS) as a tool for gaining insight into the technical performance and safety of medical devices has emerged continuously over the past years. However, to rely on information and decisions derived from model predictions, it is essential to establish model credibility for the specific context of use. Limited regulatory requirements and lack of consensus on the level of verification and validation activities required result in rare use of CMS as a source of evidence in the medical device approval process. The American Society of Mechanical Engineers (ASME) developed a risk-informed framework to establish appropriate credibility requirements of a computational model: the ASME V\&V 40?2018 standard. This paper aims to outline the concepts of this standard and to demonstrate its application using an example from the orthotics field. The necessary steps to establish model credibility for a custom?made 3D printed wrist hand orthosis (WHO) are presented. It is shown that the credibility requirements of each verification and validation activity depend on model risk by applying two different contexts of use to the same computational model.}, language = {en} } @article{Matthies2024, author = {Matthies, Benjamin}, title = {Toward a notation for modeling value driver trees: Classification development and research agenda}, series = {Journal of Corporate Accounting \& Finance}, journal = {Journal of Corporate Accounting \& Finance}, doi = {10.25974/fhms-17886}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:836-opus-178861}, pages = {1 -- 28}, year = {2024}, language = {en} } @article{Morawetz2024, author = {Morawetz, Klaus}, title = {Time behavior of hubble parameter by torsion}, series = {Modern Physics Letters A}, volume = {Vol. 39}, journal = {Modern Physics Letters A}, number = {No. 3}, doi = {10.25974/fhms-17973}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:836-opus-179736}, pages = {2350192-1 -- 2350192-10}, year = {2024}, abstract = {Consequences of the consistent exact solution of Einstein{Cartan equation on the time dependence of Hubble parameter are discussed. The torsion leads to a space and time-dependent expansion parameter which results into nontrivial windows of Hubble parameter between diverging behavior. Only one window shows a period of decreasing followed by increasing time dependence. Provided a known cosmological constant and the present values of Hubble and deceleration parameter this changing time can be given in the past as well as the ending time of the windows or universe. The comparison with the present experimental data allows to determine all parameters of the model. Large-scale spatial periodic structures appear. From the metric with torsion outside matter, it is seen that torsion can feign dark matter.}, language = {en} } @techreport{Hinse2021, author = {Hinse, Michael}, title = {The Wells turbine: state of the art}, doi = {10.25974/ren_rev_2021_12}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:836-opus-136861}, pages = {63-66}, year = {2021}, abstract = {The first oscillating water column was invented in 1940. In the past decades the need of wave energy systems has significantly increased. This article quickly describes the Wells turbine and possibilities to enhance its performance and should answer the question: what are the design parameters that can be optimized? Furthermore it gives a small outlook about the history of oscillating Water Columns.}, language = {en} } @article{KlemmBeckerTocklothetal.2023, author = {Klemm, Christian and Becker, Gregor and Tockloth, Jan N. and Budde, Janik and Vennemann, Peter}, title = {The Spreadsheet Energy System Model Generator (SESMG): A tool for the optimization of urban energy systems}, series = {Journal of Open Source Software}, volume = {8}, journal = {Journal of Open Source Software}, number = {89}, issn = {2475-9066}, doi = {10.25974/fhms-17084}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:836-opus-170845}, pages = {5519}, year = {2023}, abstract = {The Spreadsheet Energy System Model Generator (SESMG) is a tool for modeling and optimizing energy systems with a focus on urban systems. The SESMG is easily accessible as it comes with a browser-based graphical user interface, spreadsheets to provide data entry, and detailed documentation on how to use it. Programming skills are not required for the installation or application of the tool. The SESMG includes advanced modeling features such as the application of the multi-energy system (MES) approach, multi-objective optimization, model-based methods for reducing computational requirements, and automated conceptualization and result processing of urban energy systems with high spatial resolution. Due to its accessibility and the applied modeling methods, urban energy systems can be modeled and optimized with comparatively low effort.}, language = {en} } @book{OPUS4-13985, title = {The Internationalisation of Higher Education - Perspectives from the THEA Ukraine Project and Beyond}, editor = {Pistor, Petra}, publisher = {FH M{\"u}nster}, address = {M{\"u}nster}, doi = {10.25974/fhms-13985}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:836-opus-139854}, publisher = {FH M{\"u}nster - University of Applied Sciences}, pages = {166}, year = {2021}, abstract = {The Ukrainian higher education system has undergone a number of developments since Ukraine committed itself to the Bologna Process in 2005. Internationalisation and quality assurance in higher education have thus become two core policy issues to aid Ukraine's efforts in becoming a full member of the European Higher Education Area. Within the THEA Ukraine project (October 2019 - September 2021), 32 Ukrainian Higher Education Administrators received training in the field of internationalisation in higher education and science management. The participants worked on individual application projects to foster the international orientation of their home institutions, which are located all over Ukraine. The implementation of this project has provided material for a number of case study descriptions of projects undertaken in the THEA Ukraine framework, as well as general perspectives on internationalisation in higher education; this anthology covers both of these aspects.}, language = {en} } @inproceedings{BuitinkHagemanvanLeeuwen2024, author = {Buitink, Martin and Hageman, Simon and van Leeuwen, Richard}, title = {The effect of the configuration of a heat exchanger in a thermal storage}, series = {16. Steinfurter Bioenergiefachtagung - Tagungsband}, booktitle = {16. Steinfurter Bioenergiefachtagung - Tagungsband}, address = {Steinfurt}, doi = {10.25974/fhms-17836}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:836-opus-178366}, pages = {1}, year = {2024}, abstract = {Poster - The effect of the configuration of a heat exchanger in a thermal storage}, language = {en} } @article{MuellerBrandes2015, author = {M{\"u}ller, Carsten and Brandes, Mirko}, title = {The effect of kinesiology tape applications on performance in amateur soccer and team handball}, series = {Journal of Human Kinetics}, volume = {49}, journal = {Journal of Human Kinetics}, number = {1}, doi = {10.25974/fhms-16855}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:836-opus-168553}, pages = {119 -- 129}, year = {2015}, abstract = {Evidence supporting performance enhancing effects of kin esiotape in sports is missing . The aims of this studywere to evaluate effects of kinesiotape applications with regard to shooting and throwing performance in 26 amateursoccer and 32 handball players, and to further investigate if these effects were influenced by the players' level ofperformance. Ball speed as the primary outcome and accuracy of soccer kicks and handball throws were analyzed withand without kinesiotape by means of radar units and video recordings. The application of kinesiotapes significantlyincreased ball speed in soccer by 1.4 km/h (p=0.047) and accuracy with a lesser di stance from the target by -6.9 cm(p=0.039). Ball velocity in handball throws also signific antly increased by 1.2 km/h (p=0.013), while accuracy wasdeteriorated with a greater distance from the target by 3.4 cm (p=0.005). Larger effects with respect to ball speed werefound in players with a lower performance level in kick ing (1.7 km/h, p=0.028) and throwing (1.8 km/h, p=0.001)compared with higher level soccer and handball players (1.2 km/h, p=0.346 and 0.5 km/h, p=0.511, respectively). Inconclusion, the applications of kinesiot ape used in this study might have beneficial effects on performance in amateursoccer, but the gain in ball speed in handball is counterac ted by a significant deterioration of accuracy. Subgroupanalyses indicate that kinesiotape may yield larger effects on ball velocity in athletes with lower kicking and throwingskills.}, language = {en} } @article{Martinetal.2021, author = {Martin, Maria and ..., ... and ..., ... and Lorek, Sylvia and ..., ...}, title = {Ten new insights in climate science 2021: a horizon scan}, series = {Global Sustainability}, journal = {Global Sustainability}, publisher = {Cambridge University Press}, doi = {10.25974/fhms-16066}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:836-opus-160666}, year = {2021}, abstract = {A synthesis is made of 10 topics within climate research, where there have been significant advances since January 2020. The insights are based on input from an international open call with broad disciplinary scope. Findings include: (1) the options to still keep global warming below 1.5 °C; (2) the impact of non-CO2 factors in global warming; (3) a new dimension of fire extremes forced by climate change; (4) the increasing pressure on interconnected climate tipping elements; (5) the dimensions of climate justice; (6) political challenges impeding the effectiveness of carbon pricing; (7) demand-side solutions as vehicles of climate mitigation; (8) the potentials and caveats of nature-based solutions; (9) how building resilience of marine ecosystems is possible; and (10) that the costs of climate change mitigation policies can be more than justified by the benefits to the health of humans and nature.}, language = {en} } @article{NakabuyeMayanjaBimbonaetal.2023, author = {Nakabuye, Zaina and Mayanja, Jamiah and Bimbona, Sarah and Wasserman, Michael}, title = {Technology orientation and export performance: the moderating role of supply chain agility}, series = {Modern Supply Chain Research and Applications}, volume = {5}, journal = {Modern Supply Chain Research and Applications}, number = {4}, issn = {2631-3871}, doi = {10.25974/fhms-17462}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:836-opus-174624}, pages = {230 -- 264}, year = {2023}, abstract = {Purpose The purpose of this paper is to investigate the relationships between technology orientations and export performance of small and medium-sized enterprises (SMEs). Design/methodology/approach A quantitative research design was adopted for this study. The paper formulates hypotheses from the literature review. These hypotheses are tested using structural equation modeling with data collected from 231 SMEs in Uganda. Data were analyzed using SPSS version 23 and AMOS. Findings The findings of this study showed technology orientation has a positive and significant relationship with the performance of Ugandan SMEs and that supply chain agility moderates technology orientation and export performance. Research limitations/implications The study discusses the findings, advances limitations and managerial implications. It also suggests future research avenues. It proposes some recommendations to help Ugandan SMEs to form flexible supply chains, use the latest technology and create strong relationship ties with their partners in the supply chain. Practical implications The study suggests that managers of Ugandan SMEs should use the latest technology in production, marketing, logistics and supply chain management which will enable them to respond quickly to customer tastes and preferences leading to higher levels of export performance. Originality/value This study contributes to the literature on strategic management showing the reliability of scales used and the confirmatory of the factor structure. This study shows that in strategic management technology, orientation is critical in increasing export performance. This study has extended the resource-based view (RBV) and dynamic capabilities theories.}, language = {en} } @article{Brinkschmidt2024, author = {Brinkschmidt, Florian}, title = {Technologies for structural health monitoring of wind turbine blades - An overview of different techniques}, series = {Educational Journal of Renewable Energy Short Reviews}, journal = {Educational Journal of Renewable Energy Short Reviews}, doi = {10.25974/ren_rev_2024_03}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:836-opus-176401}, pages = {14 -- 21}, year = {2024}, abstract = {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.}, language = {en} } @techreport{Tillenburg2021, author = {Tillenburg, Dennis}, title = {Technical challenges of floating offshore wind turbines - An overview}, doi = {10.25974/ren_rev_2021_03}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:836-opus-136770}, pages = {13-18}, year = {2021}, abstract = {Floating offshore wind (FOW) holds the key to 80 \% of the total offshore wind resources, located in waters of 60 m and deeper in European seas, where traditional bottom-fixed offshore wind (BFOW) is not economically attractive. Many problems affecting floating offshore wind turbines (FOWT) were quickly overcome based on previous experience with floating oil rigs and bottom-fixed offshore wind. However, this technology is still young and there are still many challenges to overcome. This paper shows that electrical failures are amongst the most significant errors of FOWT. The most common cause was corrosion. It is also stated that the control system is most often affected, and that the Generator is frequently involved. Material corrosion is also the key factor when it comes to the most common overall reason for failures. A particular attention must be paid to mooring line fracture. Mooring lines are especially vulnerable to extreme sea conditions and the resulting fatigue, corrosion, impact damage, and further risks. It must be stated that the primary challenge is that of economics. Over time technological costs will decline making FOW more competitive and hence attractive for greater depth.}, language = {en} } @article{Volkmer2024, author = {Volkmer, Philipp}, title = {Technical challenges and trends in upscaling wind turbines - A review}, series = {Educational Journal of Renewable Energy Short Reviews}, journal = {Educational Journal of Renewable Energy Short Reviews}, doi = {10.25974/ren_rev_2024_12}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:836-opus-176492}, pages = {73 -- 78}, year = {2024}, abstract = {The upscaling of wind turbines has been increasing in recent years and will continue to play a significant role in the future, as it allows for the reduction of electricity generation costs. Various challenges arise when it comes to upscaling. This article summarizes the technical challenges associated with upscaling wind turbines and presenting their problem-solving approaches and research trends based on other reviews. It was found that the most frequently cited challenges are related to individual components, such as rotor blades, drive train, generator, tower, and noise impact. For rotor blades, the challenges are increased flexibility, more aeroelastic vibrations, increased wear, interferences with radar and transportation difficulties. Proposed solutions include the use of carbon-fiber blades, prebending, novel paints, and for transportation, segmented rotor blades and on-site manufacturing. In the gearbox, torque increases, leading to higher weight and susceptibility to errors. As a result, the trend is moving towards gearless systems with permanent magnet synchronous generators. Transportation is the major issue with towers, which can be resolved with on-site manufacturing. In terms of noise emission, reducing aerodynamic noise plays the most significant role.}, language = {en} }