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  • 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.
11

Utformning av ett verktyg för att nå cirkulära lösningar i byggprojekt : Implementering av cirkulär ekonomi på företaget Incoord / Development and design of a tool for reaching circular solutions in construction projects

Kristoffersson, Agnes, Koch, Johanna January 2018 (has links)
This master thesis aims to create a user-friendly Excel-based tool tohelp the co-workers at Incoord, a technology consulting companywithin the construction business, to implement circular economy intheir projects. A literature study was done focusing on theconstruction business, circular economy and earlier implementedcircular projects and user-design experience. Interviews were heldwith the co-workers at Incoord to identify where and how circulareconomy can be implemented in the projects at Incoord. In addition,workshops and a case-group meeting were held with the co-workers toset up the requirement specifications for user-design experience andto encourage the co-workers to come up with circular solutions. All of this resulted in a framework that included knowledge aboutuser-design experience and questions encouraging circular solutionsin the projects at Incoord. The framework was used when the digitaltool was created in Excel. The tool was evaluated to make sure thatit met the requirement specifications. It resulted in a toolconsisting of four parts; the first focusing on circular solutionsthat can be made by Incoord themselves, the second advocated toexternal actors, the third focusing on promoting circular materialand the fourth calculating the carbon dioxide reduction whenreprocessing compared to making new materials. The different partscan be adjusted depending on which area of expertise the user isworking within. Points are collected depending on the answers in thedifferent parts, which gives the user a concluding result that showshow circular the current project can be.
12

Life Cycle Assessment of Portland Cement and Concrete Bridge : Concrete Bridge vs. Wooden Bridge

Mousavi, Marjan January 2013 (has links)
Today global warming mitigation, natural resource conservation and energy saving are some of the significant concerns of different industries, such as cement and concrete industries. For that reason, a streamlined life cycle assessment (LCA) model of one ton of a Portland cement, CEM I produced in Cementa AB’s Degerhamn plant, has been developed by using the LCA software KCL-ECO. LCA is a tool that identifies in which stages of a product’s life cycle the most environmental burdens occur. The environmental analysis was limited to identify total energy consumption and total carbon dioxide (CO2) emissions per ton of Portland cement. Results show that the most significant energy consumption and CO2 emissions are related to clinker kiln, due to the process of calcination of limestone and fuel combustion in the kiln. Of total CO2 emissions, 52 % and 46 % result from the calcination process and fuel combustion respectively.  One of the applications of CEM I is in construction of concrete bridges. Therefore an LCA model of a concrete bridge located north of Stockholm was developed in KCL-ECO. Environmental indicators calculated are: total CO2 emissions and energy consumption through the entire life cycle of the bridge. CO2 uptake or carbonation of the concrete during the service life of the product and end of life treatment is one of the advantages of concrete products. During the carbonation process, some of the total CO2 released from calcination will be absorbed into the concrete. Results indicate that production of raw materials and transports during the life cycle of the concrete bridge, are main contributors to total CO2 emissions. Among raw materials, cement production has the highest CO2 emissions. Energy consumption is mainly related to concrete and concrete products production. CO2 uptake during the use phase of the bridge is small compared to total CO2 emissions from calcination. Furthermore, the results show that different waste handling practises result in different CO2 uptake behaviours. The total CO2 uptake from crushing and storing of the demolished concrete (scenario 1) and landfilling of the demolished concrete (scenario 2) is 10 % and 5 % of the total CO2 emissions from calcination respectively.  Since comparison of different construction materials from an environmental point of view is always desirable, the LCA tool was used to compare the total energy consumption and the CO2 emissions from a concrete bridge and a wooden bridge. The functional unit was defined as 1 square meter of bridge surface area, since the bridges were of different sizes and shapes. In this comparison the total emissions and energy consumption were much higher for the concrete bridge than for the wooden bridge.  In order to show how different assumptions could affect the results, a virtual concrete bridge with the same shape and size as the wooden bridge was designed and compared with the wooden bridge. The functional unit selected for this case was one bridge. In this case the virtual concrete bridge requires less energy, while the wooden bridge emits less CO2 to the atmosphere. For the wooden bridge, CO2 in growing forests was included, which could be debated. Overall, a comparison of the environmental performance of the wooden bridge and the concrete bridges was more complex than initially expected and great care is recommended in choosing material and application. With concrete, the design (and quantity of material used) seems to be a very sensitive parameter and may result in much larger energy used and CO2 emissions than a wooden bridge. On the other hand, the virtual bridge comparison showed that concrete advantages such as higher durability and lower maintenance may be theoretically combined with a comparable energy and climate performance as a wooden alternative.
13

House Recycled

Hong, Wei 31 August 2023 (has links)
The development of society calls for a new approach to traditional building systems, which no longer meet the demands of today's society. This is mainly manifested in the following points: 1. Traditional buildings, when decayed, generate a large amount of construction waste, which occupies more land and resources in the form of landfills. New buildings should aim to minimize or eliminate construction waste generation, thus reducing environmental damage. The transformation of buildings from "Cradle to Grave" to "Cradle to Cradle." 2. Different ages, social roles, and professions require varying building functionalities and sizes. Buildings should be adaptable to meet these diverse needs. 3. Buildings should not be permanently fixed to a single location but should be in a continuous process of change, even to the extent of being movable. 4. Buildings should have a growth and transformation process, where components can be recycled and reused, similar to how chemical elements can cycle naturally in the environment. 5. Buildings should be designed for rapid transport, assembly, and disassembly. They should not require specialized construction workers for installation. This is in contrast to traditional buildings with long construction periods, poor construction quality, and high levels of complexity. 6. Building design should be simplified and modular, allowing for quick achievement of aesthetic, functional, safety, and livability requirements. Owners should be able to participate in the design process, enabling them to meet their own usage and living needs. This approach differs from traditional building design, which requires extensive involvement from trained architects and engineers, resulting in higher construction costs and resource consumption. 7. New recycling houses should be adaptable for various functions and building types, such as houses, apartments, townhouses, offices, affordable housing, single-story or multi-story buildings, and even high-rise structures. 8. In summary, the concept of recycling houses aligns with the need for sustainable and adaptable buildings that minimize waste, accommodate diverse needs, promote ease of construction, and allow for resource conservation. / Master of Architecture / The development of society calls for a new approach to traditional building systems, which no longer meet the demands of today's society. This is mainly manifested in the following points: 1. Traditional buildings, when decayed, generate a large amount of construction waste, which occupies more land and resources in the form of landfills. New buildings should aim to minimize or eliminate construction waste generation, thus reducing environmental damage. The transformation of buildings from "Cradle to Grave" to "Cradle to Cradle." 2. Different ages, social roles, and professions require varying building functionalities and sizes. Buildings should be adaptable to meet these diverse needs. 3. Buildings should not be permanently fixed to a single location but should be in a continuous process of change, even to the extent of being movable. 4. Buildings should have a growth and transformation process, where components can be recycled and reused, similar to how chemical elements can cycle naturally in the environment. 5. Buildings should be designed for rapid transport, assembly, and disassembly. They should not require specialized construction workers for installation. This is in contrast to traditional buildings with long construction periods, poor construction quality, and high levels of complexity. 6. Building design should be simplified and modular, allowing for quick achievement of aesthetic, functional, safety, and livability requirements. Owners should be able to participate in the design process, enabling them to meet their own usage and living needs. This approach differs from traditional building design, which requires extensive involvement from trained architects and engineers, resulting in higher construction costs and resource consumption. 7. New recycling houses should be adaptable for various functions and building types, such as houses, apartments, townhouses, offices, affordable housing, single-story or multi-story buildings, and even high-rise structures. 8. In summary, the concept of recycling houses aligns with the need for sustainable and adaptable buildings that minimize waste, accommodate diverse needs, promote ease of construction, and allow for resource conservation.
14

Design for Deconstruction

Fleming, David Lee 13 July 2009 (has links)
No description available.
15

Med ögon känsliga för grönt

Schneider, Maria January 2017 (has links)
Denna studies fokus ligger vid de miljöcertifieringar och miljömärkningar som används av tryckerier som ligger i Malmö- och Köpenhamnsområdet. Syftet är dels att skapa en djupare förståelse dels för vilka faktorer som spelar in då ett tryckeri miljöcertifieras, samt att bidra med kunskap om vad en certifiering så som Cradle to Cradle skulle bidra med i förhållande till de miljöcertifieringar som idag är mer etablerade inom grafisk industri. Kvalitativa intervjuer med representanter från fem tryckerier genomfördes. Utöver dessa analyserades kravdokument av de av studien berörda miljöcertifieringarna. Resultaten visar att det finns flera olika anledningar som ligger till grund för att implementera en miljöcertifiering. Gemensamt för de medelstora och stora tryckerierna är dock att de kommunicerar ökade kundkrav som en bidragande orsak till valet att certifiera tryckeriet. Resultaten visar även att en certifiering enligt Cradle to Cradle är mer omfattande samt kostsam än de idag redan etablerade miljöcertifieringarna och miljömärkningarna. / This thesis focuses on the environmental management systems and eco-labels that are used in the printing industry. The aim is to get a deeper understanding of if and why environmental management systems and eco labels are implemented into printing firms. The thesis also aims to compare the Cradle to Cradle model with other environmental management systems and eco- labels used in the printing industry. Qualitative interviews with five printing firms in the Malmö and Copenhagen region was conducted through which empirical data was gathered. The result of the study show that there are a number of different reasons why environmental management systems and eco-labels are implemented but increasing demands from customers seems to be a driving force among medium sized companies.
16

The Pleistocene glaciations of the Cradle Mountain Region, Tasmania

Thrush, Michael January 2008 (has links)
Research Doctorate - Doctor of Philosophy (PhD) / The northern Central Highlands region of Tasmania extending north from Cradle Mountain to the Middlesex Plains shows evidence of three glacial stages, with the final stage consisting of several ice advance phases. From oldest to youngest these have been named the Middlesex Glaciation, the Sunshine Glaciation and the Cradle Glaciation. Cosmogenic exposure-age dating of boulders and ice-abraded bedrock, radiocarbon dating of post-glacial organic deposits, and relative dating techniques have resulted in assignment of the following ages for the events: Middlesex Glaciation, MIS 10; Sunshine Glaciation, MIS 6 and the Cradle Glaciation having MIS 3 and MIS 2 phases. The Cradle Glaciation correlates with the global Last Glaciation. Exposure-age dating of three of the Cradle Glaciation ice advance phases indicates that the Pencil Pine Phase predates 38.9±4.0 ka, the Dove Phase occurred ca. 29.2±1.4 ka, and the Cradle Valley Phase occurred between >19.7±1.1 – 17.6±1.0 ka. At least two undated retreat/readvance phases followed the Cradle Valley Phase. Deglaciation of the area was probably complete considerably before 11.2 ka. The recognised glacial events decreased in areal extent in each successive advance. Using the 0°C summer mean isotherm as the base for the altitude of the equilibrium line altitude, the regional snowline, regional snowline depression and temperature depression for each of the events were: Middlesex Glaciation, 942 m/1616 m/10.5°C; Sunshine Glaciation, 984 m/1574 m/10.23°C; Pencil Pine Phase, 1010 m/1548 m/10.06°C; Dove Phase, 1050 m/1508 m/9.8°C; and the Cradle Valley Phase, 1060 m/1498 m/9.74°C. The geomorphic evidence and dating of several phases of the Cradle Glaciation indicates a complex history of ice advances for Tasmania during the Last Glaciation.
17

Interpretation Centre

Smit, Nicolaas H 26 November 2003 (has links)
The Cradle of Humankind World Heritage Site covers an area of over 47000 hectares in the north-western corner of Gauteng, straddling the boundary between Gauteng and North West provinces. The area is of outstanding universal value as it contains a complex of palaeontological and palaeo – anthropological sites which have yielded some of the most valuable evidence worldwide of the origins of modern humans. Embedded in the rocks found in the numerous dolomitic caves in the area are the fossilised remains of hominids, their lithicultural remains and fossils of other plants, animals and pollen. These give a complete picture of the hominids and their surroundings dating back over 3.3 million years. The richness and variety of these deposits, their excellent preservation in the caves, and the age of the specimens, make this area of world significance. The aim of this dissertation is the development of an architectural product that aids interpretation of the meanings and values inherent in the COH WHS and its context. The design approach is rational and simplicity is explored in order to develop the building as communication medium and introduction to the context. By its design, the building becomes an unobtrusive line in the landscape, focusing attention on the natural setting and exposing visitors to the unique character of this heritage site. / Dissertation (MArch (Prof))--University of Pretoria, 2005. / Architecture / unrestricted
18

Cirkulera mera! : En studie om organisationers arbete mot cirkulär ekonomi och hur formell ekonomistyrning anpassas till konceptet

Svensson, Nikki January 2017 (has links)
Bakgrund: Under senare år har cirkulär ekonomi fått allt större uppmärksamhet som ett lovande koncept för att öka den globala hållbarheten och motverka resursbrist. På organisationsnivå handlar arbete mot en cirkulär ekonomi, cirkulärt arbete, om att följa nya principer för att bedriva hållbarhetsarbete och en möjlighet att förena detta med ekonomiska fördelar. Cirkulärt arbete kan därför förväntas skilja mellan offentliga och privata organisationer. Konceptet innebär också att nya mål formuleras och nya strategier används för att nå dessa, varför den formella ekonomistyrningen kan komma att behöva anpassas till det cirkulära arbetet. Syfte: Syftet med denna studie är att förklara hur offentliga respektive privata organisationer kan arbeta cirkulärt samt hur och varför formell ekonomistyrning anpassas till cirkulärt arbete. Detta för att bidra med kunskap till organisationer som vill utveckla en mer cirkulär verksamhet samt för att göra ett teoretiskt bidrag till forskningen om cirkulär ekonomi i organisationer och formell ekonomistyrning i cirkulärt arbete. Metod: Studiens metod är en tvåfallsstudie i en offentlig respektive en privat organisation. Slutsatser: Studiens slutsatser är att cirkulärt arbete i offentliga organisationer riktas mycket mot utveckling av cirkulär ekonomi i samhället samt att privata organisationer försöker förena hållbarhetsansvar med ekonomiska fördelar genom att utnyttja resurser i högre utsträckning samt förbereda sig inför ett samhälle som stödjer cirkulär ekonomi. Det cirkulära arbetet kan också skilja på grund av organisationens förutsättningar. Den formella ekonomistyrningen anpassas främst genom man försöker påverka medarbetare till att engagera sig i cirkulärt arbete. Vidare krävs tydligare planering samt nya mått för att driva och utvärdera det cirkulära arbetet. Planering och beslutsfattande kräver också en ökad detaljnivå och ett längre tidsperspektiv i styrning mot cirkulärt arbete. / Background: In recent years, circular economy has gained increased attention as a promising concept for global sustainability and solution for resource scarcity. Moving towards a circular economy in organizations is about following new principles for increased sustainability which can lead to economic benefits. The work towards a more circular organization may differ between public and private organizations. The concept also leads to new goals and strategies, which may lead to a need for the formal management accounting and control to be adapted in organizations that adopt the concept. Purpose: The purpose of this thesis is to explain how public and private organizations can work towards a circular economy and how and why formal management accounting and control is adapted to this work. This can lead to a contribution of knowledge for organizations that want to adopt the concept and a theoretical contribution about circular economy in organizations and formal management accounting and control. Method: The method is a case study in two cases: one public and one private organization. Conclusions: The conclusions of this study are that public organizations aim for a development of circular economy on a societal level and private organizations try to accommodate social responsibilities with economic benefits by increasing recourse utility and prepare for a society where circular activities are supported. Preconditions in organizations determines what circular activities are possible. The formal management accounting and control has been adapted mainly in cultural controls to engage co-workers. Clear goals and measures are developed to drive and evaluate the circular work. Planning and decision-making are also more detailed and have longer time perspectives.
19

The scientist, the collector, & the treasure hunter : a knowledge centre for the cradle of humankind

Barnard, Abigail A. January 2016 (has links)
The Cradle of Humankind, famous for its abundance of hominid fossils, has been preserved as a pristine landscape throughout the modern era, thanks to the establishment of the site as a natural and cultural World Heritage Site in 1994 (Maropeng 2016). In this dissertation the complexity surrounding a world heritage hominid fossil site is investigated. Kromdraai Cave, one of the five original caves included in the World Heritage declaration on the Cradle of Humankind, is investigated as a point of connection between conflicting values within the world heritage context. Through the intervention the site is envisioned as connecting not only the values of the world heritage site, but also providing an understanding of the landscape as a whole. The site is envisioned as a centre of knowledge, relating the value of the site directly to the context. The distribution of knowledge will allow the heritage to be accessible, not only to the scientist but also to the community. / Die Wiegvan die Mensdom is bekend vir die oorvloed hominied-fossiele wat daar voorkom, en is dwarsdeur die moderne era as 'n ongerepte landskap bewaar, danksy die die feit dat dit in 1994 as 'n natuurlike en kulturele Werelderfenisgebied verklaar is (Maropeng 2016). Hierdie skripsie ondersoek die kompleksiteite wat so 'n hominied-werelderfenisgebied omring. Kromdraai-grot, een van die vyf oorspronklike grotte wat ingesluit is toe Werelderfenisstatus a an die Wieg van die Mensdom toegeken is, word as aansluitingspunt tussen teenstrydige waardes binne 'n werelderfeniskonteks ondersoek. Deur die voorgestelde ingryping word dit moontlik dat die terrein nie aileen 'n verband skep tussen die onderskeie waardes wat 'n werelderfenisgebied verteenwoordig nie, maar dat daar oak 'n beter begrip van die landskap as 'n geheel verskaf word. Die terrein word as 'n kennissentrum beskou, wat sy waarde direk met die konteks in verband bring. Die verspreiding van kennis sal die erfenis toeganklik maak vir nie net wetenskaplikes nie, maar ook vir die gemeenskap. / Mini Dissertation (MArch (Prof))--University of Pretoria, 2016. / Architecture / MArch (Prof) / Unrestricted
20

Investigation of the C2C-certification and its potential on a car sun visor : A conceptual study / Undersökning av C2C-certifieringen och dess potential på ett solskydd i en bil : En konceptstudie

Falk, Andreas, Sandin, Erik January 2022 (has links)
This report describes how a car sun visor can be designed in order to meet a sustainability certification called Cradle to Cradle Certified® (C2C). The thesis is a final project for the university program Mechanical Engineering: Product Development and Design at School of engineering, Jönköping University. The thesis is in a collaboration with Polestar, a performance electric car brand with the goal to build sustainable electric cars and help create a sustainable society. One way to take this sustainability work forward is to apply C2C certifications to their products. The aim of the project was therefore to present how a sun visor from a Polestar model would meet the C2C requirements, and to develop a concept and prototype that can potentially receive a C2C certification. The project also aimed to present important conclusions about how C2C affects the product development process. The project was divided into two main sections, one deeper study of C2C and one conceptual design study. The work began with examining the structure and requirements of C2C. These were then compared to Polestar’s sun visor. Several product development phases were carried out with Bootcamp bootleg and the C2C process to develop concepts that could meet C2C´s and Polestar´s requirements. The concepts were then presented to a focus group in order to select a concept for further development. The result is a conceptual sun visor that is well adapted for C2C. The concept has a big focus on sustainable and safe materials, functions for circularity, with an extra focus on a simple disassembly process. According to the project group, the concept is assessed to possess the potential for the third highest ranking in the C2C certification. The project also resulted in a prototype to present the concept, functions and materials. / I denna rapport redovisas hur solskyddet i en bil kan designas i syfte att uppfylla en hållbarhetscertifiering kallad Cradle to Cradle Certified® (C2C). Examensarbetet är ett slutprojekt för högskoleprogrammet Maskinteknik: Produktutveckling och design vid Tekniska Högskolan i Jönköping. Examensarbetet genomförs i samarbete med Polestar, ett prestanda elbilsmärke som arbetar med att skapa hållbara elbilar för att bidra till ett hållbart samhälle. Ett sätt att föra detta hållbarhetsarbete framåt, är att tillämpa C2C-certifieringar på sina produkter. Målet med projektet blev därför att presentera hur ett solskydd från en Polestar modell uppfyller C2C-kraven, samt att ta fram ett koncept och prototyp som potentiellt kan få en C2C-certifiering. Projektet syftade även till att presentera viktiga slutsatser om hur C2C påverkar produktutvecklingsprocessen. Projektet delades in i två huvuddelar, en djupare studie av C2C och en konceptuell designstudie. Arbetet började med att undersöka uppbyggnaden samt kraven för C2C. Dessa jämfördes sedan mot Polestars solskydd. Flera produktutvecklingsfaser genomfördes med Bootcamp bootleg- och C2C processen för att ta fram koncept som kunde möta kraven från C2C och Polestar. Dessa presenterades sedan för en fokusgrupp i syfte att välja ut ett koncept att utveckla vidare. Resultatet är ett konceptuellt solskydd som är väl anpassat för C2C. Konceptet har stort fokus på hållbara och säkra material, gedigna funktioner för cirkuläritet, med ett extra fokus på en enkel demonteringsprocess. Konceptet bedöms enligt projektgruppen besitta potentialen för den tredje högsta rankingen i C2C certifieringen. Projektet resulterade även i en fysisk prototyp för att presentera konceptet, funktioner och material.

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