Search
Now showing items 121-130 of 2006
Aufsatz
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 ...
Aufsatz
Characterization of wood-based multi-material systems under dynamic impact stress
(2018)
Due to its naturally grown properties, wood has played a rather subordinate role as a material for technical applications up to now. In this paper, multi-material systems based on veneers of beech (Fagus sylvatica) with different reinforcing variants were investigated. In addition to the influence of different adhesive systems (urea formaldehyde and polyurethane), the effect of reinforcing by aramid fiber fabric and stainless steel foil in different climates was examined. At the center of the investigations were ...
Aufsatz
Influences on the mechanical properties of SRCs in a combined compacting and back injecting process
(2022-03-03)
In this research paper, the effects of the combined compacting and back-injection process to produce back-injected self-reinforced composites on the mechanical properties of the self-reinforced composites (SRCs) are investigated. For this purpose, the parameters barrel temperature, time of injection and holding pressure were varied for the back injection. Tensile and bending tests were carried out on the SRCs. The results show that the mechanical properties depend to a large extent on the process parameters. The ...
Aufsatz
Cross-Linked Hydrophobic Starch Granules in Blends with PLA
(2018-04-17)
The majority of native starch is used in the food sector and in the paper industry. Only a small amount is used in polymer engineering. One reason for the reluctance of the plastics processing industry to use starch as a filling material in polymer blends is the unsatisfactory mechanical behavior of starch when combined with thermoplastics. Another reason is the hydrophilicity of starch. In order to make these materials capable of competing, an amelioration of the mechanical properties is compulsory. By means of ...
Aufsatz
Circular bioeconomy: Actors and dynamics of knowledge co-production in Finland
(2022-09-01)
The circular bioeconomy is a highly scrutinized concept in Finland and internationally, with a high degree of polarization regarding forest utilization rates and distrust between certain actors. This offers an interesting case for an exploratory analysis of issues associated with knowledge co-production. Knowledge co-production entails the integration of different knowledge types and collaboration across multiple societal actors with potentially conflicting viewpoints and agendas. We interviewed key organizations ...
Aufsatz
Sustainable management practices and soil quality in strawberry cultivation in Norte de Santander, Colombia
(2024)
In Pamplona, Norte de Santander, strawberry (Fragaria x ananassa Duch) producers face a dual challenge: ensuring the safety of their products and conserving natural resources. Nine farms belonging to the Association of Rural Women (ASMUR) were assessed, representing approximately 20% of the total affiliated production units within the association. The level of implementation of Good Agricultural Practices (GAP) was analysed in accordance with the 2020 Resolution of the Colombian Agricultural Institute (ICA), alongside ...
Aufsatz
Price dispersion and domestic banana market response in the Philippines
(2024)
This study investigated the vertical price transmission of banana in the domestic market of the Philippines. Banana, as one of the governments’ priority crops under the Department of Agriculture’s ‘High-value Crops Development Program’, has given priority to sustainability and global competitiveness. However, the domestic banana market consists of several marketing channels. Such complex characteristics of marketing channels can negatively affect market efficiency. In addition to such issues within a banana market, ...
Aufsatz
Effect of substituting concentrate mix with Cajanus cajan leaf on growth performance traits and carcass components of yearling rams and its potential in mitigating methane production
(2024-07-07)
The main challenges in ruminant production are to reduce feeding costs and to improve product quality while minimising environmental impact. The use of unconventional feedstuffs may contribute to decrease feeding costs and environmental impact. A study was conducted to investigate the supplementation effect of Cajanus cajan leaves (CCL) on the growth performance and carcass characteristics of yearling rams and its association with methane (CH₄) reduction in vitro. Thirty yearling rams with an initial body weight of ...
Aufsatz
How are psychodynamic conflicts associated with personality functioning? A network analysis
(2023-04-19)
Personality functioning and psychodynamic conflicts are central constructs in psychoanalytic theories of psychopathology as well as in many psychodynamic treatment models. Although there has been a longstanding conceptual discussion on how they relate to each other, empirical evidence on this question is still scarce. In this study, we explore the associations between psychodynamic conflicts and levels of structural integration (which can be used synonymously with personality functioning) by means of a partial ...
Aufsatz
Leveraging Biodiversity Action From Plural Values: Transformations of Governance Systems
(2021-06-04)
In this paper, we argue that leveraging plural values into action for biodiversity requires a focus on transforming the biodiversity governance system. We draw on Donella Meadows’ concept of Leverage Points, which outlines the “depth” of intervention in order to shift a system toward sustainability. Engaging with deep leverage points (system intent and goals) is argued to lead to greater transformation than engaging with shallow leverage points (system design and materials). We outline how embracing plural values of ...