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  1. Book ; Online: Efficient Damping and Isolation Systems for Civil Structures

    Weber, Felix

    2023  

    Keywords Film, TV & radio ; isolation ; high damping rubber bearing ; low shape factor ; performance test ; experiment ; three-dimensional (3D) seismic isolation ; vertical seismic isolation device ; disc spring ; helical coil spring ; steel damper ; laminated rubber bearing ; seismic energy dissipation ; nuclear power plant equipment ; seismic isolation frequency ; hysteretic behavior ; cable ; control ; damping ; semi-active ; negative stiffness ; vibration ; liquid storage tank ; MetaFoundation ; time domain analysis ; earthquake ; passive control ; stop band ; suspended ceiling systems ; passively controlled structure ; pulley tackle mechanism ; shake table test ; simulation analysis ; tower-like structures ; tuned liquid gas damper ; elastic membrane ; gas spring ; gas volume ; SA-TLGD ; TLCGD ; TLCD ; TMD ; inerter ; optimization ; TMDI ; vibration mitigation ; tuned sloshing damper ; TSD ; tuned mass damper ; numerical simulation ; coupled simulation ; computational wind engineering ; CWE ; hysteresis ; internal resonances ; nonlinear modal interaction ; n/a
    Language English
    Size 1 electronic resource (194 pages)
    Publisher MDPI - Multidisciplinary Digital Publishing Institute
    Publishing place Basel
    Document type Book ; Online
    Note English
    HBZ-ID HT030721776
    ISBN 9783036565606 ; 3036565604
    Database ZB MED Catalogue: Medicine, Health, Nutrition, Environment, Agriculture

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  2. Book ; Online: Beitrag zur Entwicklung von Konstantflusspumpen für Frischbeton unter genauerer Betrachtung der Dickstoffventile

    Weber, Felix

    (Karlsruher Schriftenreihe Fahrzeugsystemtechnik)

    2021  

    Series title Karlsruher Schriftenreihe Fahrzeugsystemtechnik
    Keywords Mechanical engineering & materials ; Konstantflusspumpe für Frischbeton ; Frischbetonventil ; statistische Versuchsplanung ; virtual Prototyping
    Language 0|d
    Size 1 electronic resource (260 pages)
    Publisher KIT Scientific Publishing
    Publishing place Karlsruhe
    Document type Book ; Online
    Note German ; Open Access
    HBZ-ID HT021611126
    ISBN 9783731510376 ; 3731510375
    Database ZB MED Catalogue: Medicine, Health, Nutrition, Environment, Agriculture

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  3. Article ; Online: Underestimating microplastics? Quantification of the recovery rate of microplastic particles including sampling, sample preparation, subsampling, and detection using µ-Ramanspectroscopy.

    Weber, Felix / Kerpen, Jutta

    Analytical and bioanalytical chemistry

    2022  Volume 415, Issue 15, Page(s) 2963–2973

    Abstract: This study is one of the first to investigate the recovery rate of high- and low-density microplastic particles (polyvinyl chloride and polypropylene) from wastewater treatment plant effluents or comparable technical facilities under nearly realistic ... ...

    Abstract This study is one of the first to investigate the recovery rate of high- and low-density microplastic particles (polyvinyl chloride and polypropylene) from wastewater treatment plant effluents or comparable technical facilities under nearly realistic experimental conditions. For this purpose, a method of continuous dosing of microplastic particles into an experimental flume for open-channel flow was developed. Subsequently, 12 samples were taken using volume-reduced sampling and the entire sample purification process including oxidative treatment (with hydrogen peroxide and sodium hypochlorite), density separation (with sodium polytungstate), and subsampling was carried out. Detection was conducted using automatic particle recognition and µ-Ramanspectroscopy. An average recovery rate of 27 ± 10% was determined for polypropylene microplastic particles (d = 53 ± 29 µm), decreasing with the particle size, and 78 ± 14% for polyvinyl chloride microplastic particles (d = 151 ± 37 µm). The results suggest that microplastic emissions from wastewater treatment plants are underestimated, particularly because the recovery rate of small microplastic particles < 50 µm is only 9%.
    Language English
    Publishing date 2022-12-04
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 201093-8
    ISSN 1618-2650 ; 0016-1152 ; 0372-7920
    ISSN (online) 1618-2650
    ISSN 0016-1152 ; 0372-7920
    DOI 10.1007/s00216-022-04447-z
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    Z 4' 69/97: Show issues
    Archiv 3: Show issues
    Z 9.4: Show issues

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  4. Article: Joining of SiO2 glass and 316L stainless steel using Bi–Ag-based active solders

    Weber, Felix / Rettenmayr, Markus

    Journal of materials science. 2021 Feb., v. 56, no. 4

    2021  

    Abstract: Active brazing is a commonly used method for joining dissimilar materials with at least one non-metallic component. In the present study, joining of SiO₂ glass to 316L stainless steel was performed utilizing Bi–Ag-based solders. Ti up to a concentration ... ...

    Abstract Active brazing is a commonly used method for joining dissimilar materials with at least one non-metallic component. In the present study, joining of SiO₂ glass to 316L stainless steel was performed utilizing Bi–Ag-based solders. Ti up to a concentration of 4 and Mg up to 1 wt.% were added as active elements. Microstructures of the solder alloys in the as-cast state and of cross sections of the joined compounds were analysed using scanning electron microscopy and energy-dispersive X-ray spectroscopy. In the as-cast state of the solder, Ti is found in Bi–Ti intermetallic phases; Mg is partially dissolved in the fcc-(Ag) phase and additionally contained in a ternary Ag-Bi-Mg phase. After soldering, a tight joint was generated using several alloy compositions. Ti leads to the formation of reaction products at the steel/solder and glass/solder interfaces, and Mg is exclusively accumulated at the glass/solder interface.
    Keywords energy-dispersive X-ray analysis ; glass ; stainless steel
    Language English
    Dates of publication 2021-02
    Size p. 3444-3454.
    Publishing place Springer US
    Document type Article
    Note NAL-AP-2-clean
    ZDB-ID 2015305-3
    ISSN 1573-4803 ; 0022-2461
    ISSN (online) 1573-4803
    ISSN 0022-2461
    DOI 10.1007/s10853-020-05426-4
    Database NAL-Catalogue (AGRICOLA)

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  5. Book ; Online ; Thesis: Notstandskontrolle

    Weber, Felix [Verfasser]

    Notstand und Beurteilungsspielraum in der Praxis des Europäischen Gerichtshofs für Menschenrechte

    2019  

    Author's details Felix Weber
    Keywords Recht ; Law
    Subject code sg340
    Language German
    Publisher Nomos Verlagsgesellschaft mbH & Co. KG
    Publishing place Baden-Baden
    Document type Book ; Online ; Thesis
    ISBN 978-3-8452-9561-9 ; 3-8452-9561-9
    Database Digital theses on the web

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  6. Article ; Online: Long-Term Stability of Redox Mediators in Carbonate Solvents.

    Weber, Felix M / Kohlhaas, Ina / Figgemeier, Egbert

    Molecules (Basel, Switzerland)

    2022  Volume 27, Issue 5

    Abstract: Scanning electrochemical microscopy (SECM) used in the feedback mode is one of the most powerful versatile analytical tools used in the field of battery research. However, the application of SECM in the field of lithium-ion batteries (LIBs) faces ... ...

    Abstract Scanning electrochemical microscopy (SECM) used in the feedback mode is one of the most powerful versatile analytical tools used in the field of battery research. However, the application of SECM in the field of lithium-ion batteries (LIBs) faces challenges associated with the selection of a suitable redox mediator due to its high reactivity at low potentials at lithium metal or lithiated graphite electrodes. In this regard, the electrochemical/chemical stability of 2,5-di-tert-butyl-1,4-dimethoxybenzene (DBDMB) is evaluated and benchmarked with ferrocene. This investigation is systematically carried out in both linear and cyclic carbonates of the electrolyte recipe. Measurements of the bulk current with a microelectrode prove that while DBDMB decomposes in ethyl methyl carbonate (EMC)-containing electrolyte, bulk current remains stable in cyclic carbonates, ethylene carbonate (EC) and propylene carbonate (PC). Ferrocene was studied as an alternative redox mediator, showing superior electrochemical performance in ethyl methyl carbonate-containing electrolytes in terms of degradation. The resulting robustness of ferrocene with SECM is essential for a quantitative analysis of battery materials over extended periods. SECM approach curves depict practical problems when using the decomposing DBDMB for data acquisition and interpretation. This study sheds light towards the use of SECM as a probing tool enabled by redox mediators.
    Language English
    Publishing date 2022-03-07
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 1413402-0
    ISSN 1420-3049 ; 1431-5165 ; 1420-3049
    ISSN (online) 1420-3049
    ISSN 1431-5165 ; 1420-3049
    DOI 10.3390/molecules27051737
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Cologne/Königswinter

    Zs.MO 81: Show issues

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  7. Article ; Online: Preserved particulate organic carbon is likely derived from the subsurface sulfidic photic zone of the Proterozoic Ocean: evidence from a modern, oxygen-deficient lake.

    Cohen, Ashley B / Christensen, Lisa N / Weber, Felix / Yagudaeva, Milana / Lo, Evan / Henkes, Gregory A / McCormick, Michael L / Taylor, Gordon T

    Geobiology

    2024  Volume 22, Issue 2, Page(s) e12593

    Abstract: Biological processes in the Proterozoic Ocean are often inferred from modern oxygen-deficient environments (MODEs) or from stable isotopes in preserved sediment. To date, few MODE studies have simultaneously quantified carbon fixation genes and attendant ...

    Abstract Biological processes in the Proterozoic Ocean are often inferred from modern oxygen-deficient environments (MODEs) or from stable isotopes in preserved sediment. To date, few MODE studies have simultaneously quantified carbon fixation genes and attendant stable isotopic signatures. Consequently, how carbon isotope patterns reflect these pathways has not been thoroughly vetted. Addressing this, we profiled planktonic productivity and quantified carbon fixation pathway genes and associated organic carbon isotope values (δ
    MeSH term(s) Carbon/metabolism ; Lakes/microbiology ; Carbon Isotopes/analysis ; Cyanobacteria/metabolism ; Oxygen/analysis ; Chromatiaceae/metabolism ; Methane ; Oceans and Seas
    Chemical Substances Carbon (7440-44-0) ; Carbon Isotopes ; Oxygen (S88TT14065) ; Methane (OP0UW79H66)
    Language English
    Publishing date 2024-03-04
    Publishing country England
    Document type Journal Article
    ZDB-ID 2113509-5
    ISSN 1472-4669 ; 1472-4677
    ISSN (online) 1472-4669
    ISSN 1472-4677
    DOI 10.1111/gbi.12593
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  8. Article ; Online: Electrochemically enabled oxidative aromatization of pyrazolines.

    Hofmann, Silja / Linden, Martin / Neuner, Julian / Weber, Felix N / Waldvogel, Siegfried R

    Organic & biomolecular chemistry

    2023  Volume 21, Issue 22, Page(s) 4694–4701

    Abstract: Pyrazoles are a very important structural motif widely found in pharmaceuticals and agrochemicals. An electrochemically enabled approach for the sustainable synthesis of ... ...

    Abstract Pyrazoles are a very important structural motif widely found in pharmaceuticals and agrochemicals. An electrochemically enabled approach for the sustainable synthesis of pyrazoles
    Language English
    Publishing date 2023-06-07
    Publishing country England
    Document type Journal Article
    ZDB-ID 2097583-1
    ISSN 1477-0539 ; 1477-0520
    ISSN (online) 1477-0539
    ISSN 1477-0520
    DOI 10.1039/d3ob00671a
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: Quantification of microplastics in wastewater systems of German industrial parks and their wastewater treatment plants

    Barkmann-Metaj, Luisa / Weber, Felix / Bitter, Hajo / Wolff, Sebastian / Lackner, Susanne / Kerpen, Jutta / Engelhart, Markus

    Science of the Total Environment. 2023 July, v. 881 p.163349-

    2023  

    Abstract: Microplastics (MP) enter the aquatic environment via several pathways. Many research groups have focused on municipal discharge, while research on industrial sources is rare. This study provides one of the first insights into MP occurrence and ... ...

    Abstract Microplastics (MP) enter the aquatic environment via several pathways. Many research groups have focused on municipal discharge, while research on industrial sources is rare. This study provides one of the first insights into MP occurrence and distribution in the wastewater systems of industrial parks (IPs) and their wastewater treatment plants (IPWWTPs). The effluents from production plants as well as influent, effluent, and internal samples from the IPWWTPs were assessed. Sampling methods for parallel MP mass and number analyses were developed for varying conditions. The total item emissions of MP (≥10 μm) into the environment were analyzed using μ-Raman spectroscopy and ranged from 3 · 10² to 8 · 10⁴ MP m⁻³, with a median of 6 · 10³ MP m⁻³ per IPWWTP. Masses analyzed using differential scanning calorimetry showed an MP mass discharge into the environment of 0.2 to 11 mg m⁻³ with a median of 3.7 mg m⁻³ per IPWWTP. MP item concentrations within an IPWWTP varied by two to three log levels over several days. Fibers were rare in all samples. Polymer types varied depending on the types of industrial sites and the production plants discharging into the IPWWTP. Within an IP, MP could be allocated to its dischargers, which could be useful for future regulatory requirements. Further research is needed to include different types of IPs producing various polymers and additional processing plants to expand this data set.
    Keywords aquatic environment ; calorimetry ; data collection ; microplastics ; spectroscopy ; wastewater ; wastewater treatment ; WWTP effluent ; Industrial wastewater ; Micropollutant ; μ-Raman spectroscopy ; Differential scanning calorimetry
    Language English
    Dates of publication 2023-07
    Publishing place Elsevier B.V.
    Document type Article ; Online
    Note Use and reproduction
    ZDB-ID 121506-1
    ISSN 1879-1026 ; 0048-9697
    ISSN (online) 1879-1026
    ISSN 0048-9697
    DOI 10.1016/j.scitotenv.2023.163349
    Database NAL-Catalogue (AGRICOLA)

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    In stock of ZB MED Bonn / Germany

    Z 74/341: Show issues

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  10. Article ; Online: Visibility of carbon market approaches in greenhouse gas inventories

    Schneider, Lambert / Weber, Felix / Füssler, Jürg / Moosmann, Lorenz / Böttcher, Hannes

    Carbon Management. 2022 Jan. 2, v. 13, no. 1 p.279-293

    2022  

    Abstract: Under the Paris Agreement, Parties must track the implementation and achievement of their nationally determined contributions (NDCs). In many cases, NDC targets are expressed as a greenhouse gas (GHG) emissions level and their implementation and ... ...

    Abstract Under the Paris Agreement, Parties must track the implementation and achievement of their nationally determined contributions (NDCs). In many cases, NDC targets are expressed as a greenhouse gas (GHG) emissions level and their implementation and achievement is tracked through national GHG inventories. To achieve their targets, it is thus essential for countries that the effects of mitigation measures are visible in their inventories. Inventory visibility is understood as the degree to which a change in GHG emissions or removals resulting from mitigation actions is reflected in GHG inventories. Inventory visibility can be assessed by identifying which emission sources and gases are affected by a mitigation action, determining the minimum inventory methods required for reflecting the related emission reduction, and identifying the completeness of and methods used by the current GHG inventory. In addition, it is useful to identify potential differences with the quantification approaches used under carbon market mechanisms. Inventory visibility is found to be generally high for measures that reduce CO₂ emissions from fossil fuel combustion, while in parts of the industrial processes sector and in the forestry sector there is a higher risk that emission reductions are not visible. An analysis of the portfolio of Clean Development Mechanism projects shows that for most projects this risk is low; only 8% of the carbon credit supply potential is assessed to have a medium risk and 5% is assessed to have a high risk. However, as future carbon market mechanisms under Article 6 of the Paris Agreement may need to tap more into project types with medium to higher risk of non-visibility, national GHG inventory systems may need to be strengthened to assure visibility of mitigation projects.
    Keywords United Nations Framework Convention on Climate Change ; administrative management ; carbon ; carbon dioxide ; carbon markets ; forestry ; fossil fuels ; fuel combustion ; greenhouse gases ; inventories ; risk ; GHG inventories ; market-based mechanisms ; GHG accounting ; clean development mechanism ; nationally determined contributions
    Language English
    Dates of publication 2022-0102
    Size p. 279-293.
    Publishing place Taylor & Francis
    Document type Article ; Online
    ZDB-ID 2590249-0
    ISSN 1758-3012
    ISSN 1758-3012
    DOI 10.1080/17583004.2022.2075283
    Database NAL-Catalogue (AGRICOLA)

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