• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 406
  • 159
  • 20
  • 18
  • 18
  • 11
  • 8
  • 2
  • 2
  • 2
  • 2
  • 1
  • 1
  • Tagged with
  • 667
  • 667
  • 260
  • 229
  • 225
  • 170
  • 162
  • 145
  • 142
  • 142
  • 139
  • 132
  • 128
  • 126
  • 101
  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
281

Storskalig svensk textilåtervinning : Aktuella problem och rekommendationer för framtiden

Zhang, Rui Liang, Rask, Lukas January 2017 (has links)
Textilindustrin står inför nya utmaningar till följd av den ökande globala textilkonsumtionenoch den ökande avfallsmängden. På grund av bomullens resursintensiva och miljöfarligaproduktion ökar förväntningarna att kunna möta framtidens textilefterfrågan med mindreresursintensiva och mer miljövänliga alternativ. Idag saknar vi en storskalig svensktextilåtervinning och det ökade textilavfallet kan samtidigt hanteras med hjälp av cirkulärekonomi. Genom en uppskalning av en kemisk återvinningsprocess utan stora materialförlusterkan hållbarare alternativ till bomull erhållas samtidigt som textilavfallet hanteras på ett effektivtsätt. Återvinningsprocessen omvandlar bomull till dissolvingmassa (en typ av textilmassa) förviskosproduktion. Därför undersöker vi i detta projekt vilka problem som finns och anger vårarekommendationer för att kunna realisera en sådan textilåtervinning för svenska textilflöden påen större skala, sett ur ett resurseffektivitets- och miljöperspektiv.Vi har genomfört ett kvalitativt projekt med stor vikt på litteratur. Kompletterande intervjuerhar genomförts för att identifiera och kartlägga olika steg i återvinningscykeln. Dessutom hartextilindustrins utveckling analyserats. Utifrån analysen har slutsatser dragits om hur framtidenssituation kan bli för cellulosabaserade textilier. Insamling, sortering, mekanisk och kemiskåtervinning har identifierats som huvudkomponenter och vår slutsats är att dessa behöverutvecklas gemensamt för en fungerande, resurseffektiv och miljövänlig textilåtervinning. Dettagörs för att undvika olika flaskhalsar i återvinningscykeln. Därmed kan en cirkulär ekonomiuppnås. Utifrån analysen konstateras att textilindustrin ändrar karaktär och blir allt merkemibaserad, likt ett bioraffinaderi, där man tar tillvara på alla restprodukter. / The textile industry is facing new challenges as a result of increasing global textile consumptionand the increasing volume of waste. Due to the resource-intensive and environmentallyhazardous production of cotton, expectations are increasing to meet future demand for textileproducts with less resource-intensive and more environmentally friendly alternatives. Todaywe lack a large-scale Swedish textile recycling and the increased amount of textile waste canbe handled by means of circular economy. By scaling up a chemical recycling process withoutmajor material losses more sustainable alternatives to cotton can be obtained while managingthe waste efficiently. The recycling process converts cotton into dissolving pulp (a type oftextile pulp) for viscose production. Thus, we will during this project investigate the problemsthat exist and give our recommendations to implement such a textile recycling for Swedishtextile flows on a larger scale, viewed from a resource efficiency and environmentalperspective.We have made a qualitative study with emphasis on literature studies. Additional interviewshave been conducted to identify and map out various steps in the recycling process. In addition,the development of the textile industry has been analyzed. Based on this analysis, conclusionshave been drawn about how the future situation may be for cellulose-based textiles. Collection,sorting, mechanical and chemical recycling have been identified as main components in therecycling process and our conclusion is that they need to be developed simultaneously for aresource efficient and environmentally friendly textile recycling. The purpose is to avoiddifferent bottlenecks in the recycling process. A circular economy could therefore be achieved.Based on our analysis, a conclusion can be drawn that the textile industry is changing itscharacter and is becoming more chemically intensive, similar to a biorefinery, where allresidues are used.
282

Greening the thread : A comparative study of design processes to reduce microplastic shedding in Swedish textile companies

Victorsson, Stina, Reynolds, Sonya January 2023 (has links)
Purpose – This study aims to gain an increased understanding of how textile companies perceive opportunities and challenges in reducing microplastic shedding in the design process. Specifically, the thesis compares and analyses two distinct textile companies with diverse business approaches. Methodology – A qualitative research method was chosen to gain in-depth knowledge through semi-structured interviews, while a deductive approach was used to connect existing theories to practical implications. A thematic analysis was employed to systematically analyse the empirical data, aligning with the developed analysis model in the thesis. Findings – Based on the results, it indicates that the design process in the textile industry plays a crucial role in reducing microplastic emissions by enabling sustainable product design through material selection and considering the product's life cycle. However, challenges arise in selecting sustainable materials and implementing sustainable practices due to limited awareness, availability, and standardised measurement methods. Through a comparative analysis of two distinct companies, the study generates valuable insights and knowledge on how organisations can re-evaluate their methods, processes, and material selections to foster more sustainable design practices. Originality/value – This study enhances originality by examining and analysing the perspectives of Swedish textile companies regarding the opportunities and challenges associated with reducing microplastic emissions in the design process. By emphasising a pre-consumer stage in the textile value chain, the study departs from the traditional focus on post-consumer phases, thus addressing the microplastic issue from a new perspective. The findings of this study hold significance for both theoretical and practical realms by advancing an increased understanding of sustainable policies and practices aimed at reducing microplastic emissions in the textile industry.
283

A skein of Hope: Strategically moving the emerging Swedish wool value chain towards sustainability

Van Acker, Andrea, Nguyen, Trang, Kianian Seyed Abadi, Behnaz January 2023 (has links)
This thesis started with the discovery that in Sweden, about 70% of wool, a valuable material, is wasted in 2017. In recent years, a local value chain in Sweden has gained momentum to increase the use of Swedish wool as a circular and sustainable fibre for the textile industry in the country. This thesis aimed at suggesting a strategic approach to strengthen the Swedish wool value chain. To do so, we used the leverage points framework as a systems thinking lens to uncover system dynamics and assess what is most needed in the system through semi-structured interviews. Then, a systematic literature review was conducted to uncover interventions contributing to sustainable transformations in the global wool value chain and suggest a strategic approach for the Swedish case. The key leverage point that emerged as a result of the research is enhancing the capacity to self-organise as a system, which can happen through increasing collaboration, fostering a structure for learning and flows of information. The strategic intervention that we suggested is to establish a ‘connector’ in the system in order to facilitate underway projects as well as collaboration in a national perspective to develop and expand the use of Swedish wool.
284

An IoT-enabled Decision Support System for Circular Economy Business Model

Mboli, Julius S., Thakker, Dhaval, Mishra, J. 07 April 2020 (has links)
Yes / The traditional linear economy using a take‐make‐dispose model is resource intensive and has adverse environmental impacts. Circular economy (CE) which is regenerative and restorative by design is recommended as the business model for resource efficiency. While there is a need for businesses and organisations to switch from linear to CE, there are several challenges that needs addressing such as business models and the criticism of CE projects often being small scale. Technology can be an enabler toward scaling up CE; however, the prime challenge is to identify technologies that can allow predicting, tracking and proactively monitoring product's residual value to motivate businesses to pursue circularity decisions. In this paper, we propose an IoT‐enabled decision support system (DSS) for CE business model that effectively allows tracking, monitoring, and analysing products in real time with the focus on residual value. The business model is implemented using an ontological model. This model is complemented by a semantic decision support system. The semantic ontological model, first of its kind, is evaluated for technical compliance. We applied DSS and the ontological model in a real‐world use case and demonstrate viability and applicability of our approach.
285

Drivers and Barriers to Circular Water Economy Implementation in Ohio

Hull, MacKenzie S. January 2022 (has links)
No description available.
286

Uncovering the Recycling Distraction: a Graphic Designer’s Journey Designing a Website to Challenge Recycling-Based Individualism

Gruebel, Rhys January 2022 (has links)
No description available.
287

Comparative analysis of linear and circular manufacturing system paradigms for a steel-based product. : A case study of a mailbox manufacturing company

ALAGBADA, SAMUEL January 2022 (has links)
The manufacturing industry has exerted a tremendous impact on the natural environment. The aim of this thesis is to evaluate the consequences of shift from linear manufacturing system to circular manufacturing system in order to decouple the environmental burden of production and consumption process in relation to quantity of carbon footprint, cumulative energy demand, natural resource consumption, waste generated and recovered presently. In response to this, life cycle assessment (LCA) is used to quantify and compare the associated environmental impact of the current manufacturing system of both Linear manufacturing system and the circular manufacturing system. The thesis therefore asserts that circular manufacturing system (CMS) is more sustainable compared to linear manufacturing system (LMS) in relation to its reduction capacity of the prevailing environmental indicators most especially global threat of natural resources depletion and climate change confronting biodiversity. The result shown that CMS seems more sustainable compared to LMS in relation to the studied environmental indicators. Further to this, the emerging circular manufacturing system, its transitional shift, challenges, and its relationships with other manufacturing dynamics for consideration are also highlighted and discussed. It was concluded that these prominent challenges are caused by organizational management in relation to leadership and communication (OLC), has the highest impact value. Similarly, the consequential effect was seen on the level of implementation of government policy (GPI) and deployment of state of the art design, knowledge and technology (DTK) for the paradigm shift. So, it is suggested that OLC should be given due consideration.
288

Green Financing: Financing Circular Economy Companies : Case Studies of Ragn-Sellsföretagen AB and Inrego AB

Acheampong, Josephine January 2016 (has links)
The circular economy (CE) has been identified as a catalyst in sustainable development and economic growth that has the potential to move society from the traditional linear model of resource consumption in the form of take-make-waste to an innovative circular model in the form of reduce-reuse-recycle. Transitioning from the linear economy to the CE requires changes in four areas: material and product design, business models, global reverse networks and enabling business environments. This study considers the financing needs of CE companies as a result of business model changes. Through the case studies of Ragn-Sellsföretagen AB and Inrego AB, analysed with secondary data from ING Bank and primary data collected through semi-structured interviews with the case companies, this research sheds more light on the financing needs of circular economy companies and how they are financed. Findings from this research suggest that the financing needs of circular economy companies depend on the value proposition of the company. In accordance with the pecking order of capital structure, all financing needs of the companies studied are financed from internal sources, particularly retained earnings before external debt financing is accessed. Findings indicate the willingness of banks to finance circular economy companies. The results of this research suggest that the circular economy companies studied do not need financial support from the government or its agencies to succeed even though favourable laws are welcomed. They report that their long-term success depends on their ability to remain innovative in their business models, aligning with Schumpeter’s creative destruction model.
289

Design for Recycling : Guidelines for Increased Recycling Efficiency and Recovery Rate of Materials / Design för återvinning : Riktlinjer för ökad återvinnings effektivitet och återvinningsgrad av material

Thureborn, Linn, Yvell, Emma January 2022 (has links)
The manufacturing industry faces a rapidly growing problem which is the increased stream of electronic waste. Due to the fast evolving technology, the innovation cycles have been shortened and the demand for various electronic products has increased. This development requires increasingly advanced material combinations and assemblies to meet both product and customer requirements, which at the same time leads to products becoming more difficult to recycle. Ericsson is one of the world's largest companies in manufacturing and sales of telecom equipment and wants to gain knowledge in how their products are recycled, and how their products should be designed to facilitate the recycling process. As of today, Ericsson has a document from 2004 with design guidelines with a broad focus on the environment. The purpose of this master thesis has been to develop these guidelines, but with a focus on when the product has reached its end of life and is to be recycled. This has been done through an initial collection of secondary data from the literature regarding design for recycling guidelines. These guidelines have been evaluated using a mixed method, where both qualitative and quantitative data have been collected, analyzed and compiled. The biggest focus has been on discussing with recycling experts to get a deeper understanding of what is important for their process to work as efficiently as possible. Finally, a product evaluation has been performed where 3 products have been evaluated against the final set of guidelines to identify areas for improvement. This thesis has provided 30 design guidelines with a focus on increasing the efficiency of the recycling process of Ericsson's products. These guidelines cover 3 different areas: Material and material combinations, Fasteners and connectors, and Labels and markings. It is recommended that these guidelines should be implemented as early as possible in Ericsson's product development process to have the greatest impact on the final design of new products. / Tillverkningsindustrin står idag framför ett snabbt växande problem, nämligen den ökande mängden av elektroniskt avfall. På grund av den snabbt utvecklande teknologin så har innovations cyklerna förkortats och efterfrågan på olika elektroniska produkter ökat. Denna utveckling kräver allt mer avancerade materialkombinationer och sammansättningar för att möta både produkt- och kundkrav, vilket samtidigt leder till att produkter blir allt svårare att återvinna. Ericsson är ett av världens största företag inom tillverkning och försäljning utav telecom utrustning och vill i större utsträckning kartlägga hur deras produkter återvinns, samt hur deras produkter bör designas för att underlätta återvinningsprocessen. I dagsläget har Ericsson ett dokument från 2004 med design riktlinjer med ett brett fokus på miljö. Syftet med detta examensarbete har varit att utveckla dessa riktlinjer, fast med ett fokus på när produkten nått slutet på sin livslängd och ska återvinnas. Detta har genomförts genom en initial insamling av data genom en litteraturstudie gällande designriktlinjer för återvinning. Dessa riktlinjer har utvärderats med en empirisk studie, där både kvalitativ och kvantitativ data har insamlats, analyserats och sammanställts. Störst fokus har legat på att diskutera med experter inom återvinning för att få en bra förståelse vad som är viktigt för att deras process ska fungera så effektivt som möjligt. Slutligen genomfördes ett test där tre produkter utvärderades med de slutliga riktlinjerna för att identifiera förbättringsområden. Detta examensarbete har resulterat i 30 design riktlinjer med fokus på att öka effektiviteten av återvinningsprocessen av Ericssons produkter. Dessa riktlinjer berör tre olika områden: Material och material kombinationer, Fästelement och kopplingar samt Etiketter och markeringar. Det rekommenderas att dessa riktlinjer implementeras så tidigt som möjligt i Ericssons produktutvecklingsprocess för att få störst inverkan på den slutliga designen för nya produkter.
290

The Circular Economy Discourse among Dutch Policy Actors : Discussing the prospects for the Circular Economy in the Netherlands

van de Gronden, Niels January 2022 (has links)
The Circular Economy (CE) has quickly become a very popular discourse and is considered to be the solution to the manifold socio-economic challenges of the Anthropocene. What this actually means, however, is still unclear and contested, as different actors and sectors pursue a different degree of ecological, economic, political and social transformation. At the same time, many government organisations have embraced the concept and have set ambitious targets for the CE, with the Dutch government setting a goal of becoming fully circular by 2050. In this context, this paper contributes to the scholarship of CE discourse by critically examining what Dutch policy actors understand by the concept of CE and what this implies for the future of the CE in the Netherlands. This research examines the circular discourse in the Netherlands by means of eleven semi-structured interviews with Dutch policy actors in which the following five narratives are identified: (I) the Equal Collaborations; (II) the Circulate Raw Materials; (III) the Addictive Lifestyle; (IV) the Cross-boundary Cooperation; and (V) the Just Transition. The circular discourse typology of Calisto Friant et al. is put central in this study to analyse the five narratives distinguished. By mapping out the five narratives on this typology grid, this research provides insights into which type of circularity discourse is most strongly advocated among Dutch policy actors. The results of this study show that the Reformist Circular Society discourse is most firmly upheld through the identified narratives, which discourse offers very optimistic perspectives for the circular future of the Netherlands by combining economic and environmental objectives. Yet, this particular discourse does not adequately address all the challenges that the CE faces. By examining the CE discourse in the Netherlands, this research aims to contribute to a comprehensive and inclusive discussion on the concept of CE and reveal what circular futures might exist.

Page generated in 0.0859 seconds