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Working paper
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What impact has the El Kamour social movement had on the establishment of a new socio-economic development model in Tataouine (Tunisia)?
(2024-05-17)
• Tunesien erlebte in den letzten beiden Jahrzehnten sozio-politische Krisen, die mit der Ausbeutung von Rohstoffen im Süden des Landes verbunden waren.
• Diese Krisen hatten nationale und regionale Konsequenzen und stellten ein Entwicklungsmodell in Frage, das auf Renten und der Ausbeutung von Rohstoffen basiert.
• Die südlichen Regionen Tunesiens, wie Tataouine und Gafsa, gelten als marginalisiert, mit deutlich höheren Arbeitslosenquoten als der nationale Durchschnitt.
• Die anhaltende Marginalisierung führte ...
Aufsatz
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Cost and return analysis of organic and conventional farming systems in the Ganga River Basin, India
(2024-02-26)
Conventional farming (CF) has significantly increased the aggregate supply of food grains and ensured food security for the growing population in India. However, it proved environmentally unsustainable due to its higher reliance on chemical inputs. Organic farming (OF) becomes an alternative approach that ensures the sustainability of the agricultural system. But, the transition from CF to OF can be a lengthy process, and farmers may experience income loss during its course. Farmers will switch only when they are ...
Aufsatz
Inklusive Erwachsenenbildung umsetzen: Die Fortbildung des Projekts INAZ zur Qualifizierung und Professionalisierung der Lehrkräfte in der Erwachsenenbildung
(2021)
Im Zentrum dieses Beitrags steht die Fortbildung für inklusive Erwachsenenbildung, die sich an Kursleitende der Alphabetisierung und des Zweiten Bildungswegs richtet. Diese Fortbildung wurde aus der Praxis für die Praxis im BMBF-finanzierten Forschungsprojekt „Inklusive Bildung in der Alphabetisierungspraxis und im System des Zweiten Bildungswegs – Qualifikationen, Kompetenzen und Bedarfe des pädagogischen Personals“ (INAZ) entwickelt. Ziel des Projektes INAZ ist es, die Qualifikationen und Kompetenzen sowie die ...
Aufsatz
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Engaging diverse experts in the global science-policy interface: Learning experiences from the process of the IPBES Values Assessment
(2023-06-30)
This longitudinal study explores evidence of learning and reflexivity among experts involved in the Intergovernmental Science-Policy Platform on Biodiversity and Ecosystem Services (IPBES) Values Assessment from 2018 to 2022. As part of an online survey administered at yearly intervals, experts self-reported their views on: i) the aims they attributed to the Values Assessment, ii) their epistemic worldviews, iii) the definition of the multiple values of nature, and iv) their personal learning experiences in the ...
Aufsatz
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Values as leverage points for sustainability transformation: two pathways for transformation research
(2022-08-13)
The burgeoning literature on sustainability transformation agrees that values play a key, albeit unelucidated, role on the transformation research agenda. Recent literature linking values and transformation increasingly points toward the hypothesis that values may act as leverage points for sustainability transformation. However, how transformation research can engage with values as leverage points remains a critical knowledge gap. Here, I argue that transformation research needs to distinguish between two modes of ...
Aufsatz
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Effect of nanometric γ´-particles on the stress-induced martensitic transformation in ⟨001⟩-oriented Co49Ni21Ga30 shape memory alloy single crystals
(2019)
The effect of finely dispersed particles on the functional properties and morphology of thermally induced martensite in Co-Ni-Ga shape memory alloys has been already reported in literature, however, still important aspects are not fully understood. The current study focuses on the stress-induced martensitic transformation of solution-annealed, i.e. precipitate-free, and aged 〈001〉-oriented single crystals. In situ optical microscopy and neutron diffraction experiments show a significant influence of γ′-particles on ...
Working paper
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Extractivism and political instability in the Tunisian Gafsa mining basin
(2024-05-28)
•Im Bergbaugebiet von Gafsa in Tunesien spielte die Phosphatindustrie lange eine zentrale Rolle.
•Trotz wirtschaftlicher Bedeutung führte die Art der Ressourcenausbeutung zu sozialen Unruhen und Protesten gegen ungleiche Entwicklung.
•Die sozialen Bewegungen, insbesondere der Aufstand von 2008, spiegeln den Konflikt um Arbeitsplätze, wirtschaftliche Teilhabe und regionale Entwicklung wider.
•Die Auswirkungen dieser Unruhen zeigen, dass trotz kurzfristiger Maßnahmen das grundlegende Entwicklungsmodell im Bergbaugebiet ...
Aufsatz
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Simultaneous impact modified and chain extended glass fiber reinforced poly(lactic acid) composites: Mechanical, thermal, crystallization, and dynamic mechanical performance
(2021-02-05)
Herein, glass fiber (GF) reinforced binary, ternary, and quaternary poly(lactic acid) (PLA) composites were prepared. Toughening, and chain extension of PLA was achieved through the incorporation of impact modifier and chain extender and their concurrent effects on the spectroscopic, crystallization, mechanical, thermal, and thermomechanical properties of the composites were investigated. High mechanical properties of GF influenced the mechanical performance of the composites. However, GF alone could not restrict the ...
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Modification of self-reinforced composites (SRCs) via film stacking process
(2022-02-25)
This work presents the mechanical behavior of self-reinforced composites (SRCs) manufactured and modified via film stacking. For modification, interleaved films made of polypropylene (PP), a thermoplastic elastomer and a polyolefin engage were combined in different ways to induce the elastic modifier into the matrix material. The content of modifier was also varied in two ways. First, the films were produced out of a single material and second out of a compound. So, the same content of modifier was implemented in two ...
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Wood-Polypropylene Composites: Influence of Processing on the Particle Shape and Size in Correlation with the Mechanical Properties Using Dynamic Image Analysis
(2018-11-16)
The particle size and shape are of momentous significance for the mechanical properties of plastic composites. However, natural fillers, like wood, are not consistent in these attributes. In order to investigate the shared traits between these characteristics, WPCs were produced using polypropylene, hardwood and softwood fillers with different particle sizes and a coupling agent. Afterwards, specimens were processed using an injection molding machine. The filler sizes and shapes were measured using dynamic image ...