| 1781. |
- Koene, E., et al.
(författare)
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Eliminating time dispersion from visco-elastic simulations with memory variables
- 2019
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Ingår i: 81st EAGE Conference and Exhibition 2019. - : European Association of Geoscientists & Engineers. - 9789462822894 ; 2019, s. 1-5
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Konferensbidrag (refereegranskat)abstract
- In recent years, it has been recognized that the seismic wave equation solved with a finite-difference method in time causes a predictable and removable error through the use of so-called time-dispersion transforms. These transforms were thought not to apply to visco-elastic media. However, in this paper we demonstrate that the time-dispersion transforms remain applicable when the visco-elastic wave equation is solved with memory variables, as is commonly done. The crucial insight is that both the wave equation and the memory variables are computed with the same time-dispersion error. We show how the time-dispersion transforms can be implemented in, for example, MATLAB, and demonstrate the developed theory on a visco-elastic version of the Marmousi model. Then, the time-dispersion transforms allow computation of the visco-elastic wave equation with large steps in time without significant loss of accuracy, and without having to make any modifications to the model.
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| 1782. |
- Komassi, Ehsan, et al.
(författare)
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Investigating short term strategies in product sustainability index implementation, a case study at IKEA
- 2013
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Konferensbidrag (refereegranskat)abstract
- Companies are aware of long term benefits of sustainability, and that in the future the competitive landscape will change. However, financial concerns slow down the sustainability development process. This article aims to explore how companies move toward long term benefits of sustainability without compromise in their financial objectives in short term. This study focuses on investigating how companies use sustainability index tool as a component of short term strategy. Findings indicate that companies try to simplify the sustainability assessment and combine it with other decision making tools. This simplification is toward finding potential improvements in the product level. Results are summarized in a model which corresponds to the short term strategy development process toward sustainability. This model describes how company identifies critical products based on financial, strategic and sustainability aspects. The investigation has been performed at children’s IKEA in Sweden.
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| 1783. |
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| 1784. |
- Kontopoulos, Efstratios, et al.
(författare)
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Studying the Cohesion Evolution of Genes Related to Chronic Lymphocytic Leukemia Using Semantic Similarity in Gene Ontology and Self-Organizing Maps
- 2016
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Ingår i: Proceedings of SWAT4LS-16, 9th International Conference on Semantic Web Applications and Tools for Life Sciences.
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Konferensbidrag (refereegranskat)abstract
- A significant body of work on biomedical text mining is aimed at uncovering meaningful associations between biological entities, including genes. This has the potential to offer new insights for research, uncovering hidden links between genes involved in critical pathways and processes. Recently, high-throughput studies have started to unravel the genetic landscape of chronic lymphocytic leukemia (CLL), the most common adult leukemia. CLL displays remarkable clinical heterogeneity, likely reflecting its underlying biological heterogeneity which, despite all progress, still remains insufficiently characterized and understood. This paper deploys an ontology-based semantic similarity combined with self-organizing maps for studying the temporal evolution of cohesion among CLL-related genes and the extracted information. Three consecutive time periods are considered and groups of genes are derived therein. Our preliminary results indicated that our proposed gene groupings are meaningful and that the temporal dimension indeed impacted the gene cohesion, leaving a lot of room for further promising investigations.
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| 1785. |
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| 1786. |
- Kooroshnia, Marjan, et al.
(författare)
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Crafting Butterfly Lace – Conductive Multi-Color Sensor-Actuator Structure
- 2015
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Ingår i: Crafting Butterfly Lace – Conductive Multi-Color Sensor-Actuator Structure.
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- The work describes background and methods involved in the development of Butterfly Lace, a conductive multi-color sensor-actuator structure that lies in the intersection of traditional craft and smart materials. Traditional craft is introduced as inspiration for developing smart textiles in lace structure. Both, the process of dyeing conductive threads with multi-color thermochromic pigment mixes and the technical set up for the sensor-actuator system are described.The possibilities and challenges for the multi-color sensor-actuator combination in a lace structure are discussed based on the experience gained from working with the material. Potential applications are glanced for inspiration and future directions.
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| 1787. |
- Kooroshnia, Marjan
(författare)
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Demonstrating color transistions of leuco dye-based thermochromic inks as a teaching approach in textile and fashion design
- 2013
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Konferensbidrag (refereegranskat)abstract
- Although there are a lot of interest concerning the use of leuco dye-based thermochromic inks in Textile and Fashion Design, there is still a lack of teaching approach to help students arrive at a better understanding of the color transitions of leuco dye thermochromic inks. This paper aims to share a systematic approach for teaching the behavior of leuco dye-based thermochromic inks to students in Textile and Fashion Design. Printed color-swatches and exercises were used as the central part of the approach. Through the approach it was described what printed color-swatches were and how to use them effectively to make color transitions understandable. The approach has been applied in several workshops at both Bachelor and Master level. The samples made by the students in the exercises clearly revealed that the approach created opportunities for students to craft an understanding of using leuco dye thermochromic inks through experimentation and individual exploration. Ultimately, this approach plays a fundamental role in the design process, the creation and the development of dynamic patterns.
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| 1788. |
- Kooroshnia, Marjan
(författare)
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How to visually represent the colour theory of thermochromic inks
- 2015
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Ingår i: How to visually represent the colour theory of thermochromic inks.
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- Colour theories have been established in order to allow artists and designers to understand the relationship between colours, and to determine how a chosen colour will react or interact with another. Smart colours - such as leuco dye-based thermochromic inks - have entered into the textile and fashion design world, bringing with them new challenges. This paper stresses the fact that, in order to demonstrate and describe the behaviour of these inks at different temperatures when printed on textiles, a new colour system is required. Four design experiments using thermochromic inks are described and these, along with the discussion presented, highlight the need to develop a thermochromic colour system which can not only visualise and describe the behaviour of these inks in relation to other static pigments and temperatures, but also assist textile designers in making informed decisions during the design process.
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| 1789. |
- Kooroshnia, Marjan
(författare)
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Leuco Dye-based thermochromic inks : recipes as a guide for designing textile surfaces
- 2013
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Konferensbidrag (refereegranskat)abstract
- Although there has been some research on the use of leuco dye-based thermochromic inks in textile and fashion design, there is still a lack of research on how these inks can be used on textiles to create complex and dynamic patterns through textile printing. This paper provides information on the properties of leuco dye-pased thermochromic inks to facilitate the understanding and designing of dynamic surface-patterns, and demonstrates the color transitions of thermochromic inks at different temperatures. A practice-based design method was chosen to investigate two different reversible and water-based blue inks with activation temperatures of 27°C and 15°C. The result showed scales comprising the recipes that were used as a guide for designing textile surfaces. This paper contributes by making the color-changing process understandable and demonstrating the actual effects of leuco dye-based thermochromic inks at different temperatures for textile and fashion design. This facilitates designers to achieve more advanced textile surface patterns.
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| 1790. |
- Kooroshnia, Marjan, et al.
(författare)
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Using coloured lights in physical and immersive VR environments as material for design
- 2020
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Ingår i: THE INTERNATIONAL SCIENTIFIC CONFERENCEOF THE COLOR SOCIETY OF RUSSIA. - Smolensk. - 9785880186600 ; , s. 207-212
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Konferensbidrag (refereegranskat)abstract
- Light and lighting in fashion and textile design generally relate to the viewing and production of a fashion or textile collection in daylight, or integrating LEDs, electro-luminescent wires, and optical fibres in the structures of fabrics to create a light-emitting fashion or textile collection. This ignores the potential that coloured light as material for design can bring into these disciplines. This paper aims to investigate coloured light as a material for design in relation both to physical environments and immersive virtual reality, and to develop design methods for fashion and textile design that could lead to a re-learning of coloured light as a material for design for developing novel artistic expressions. The first series of experiments focused on addressing the following questions in both physical and virtual reality: How do coloured surfaces and coloured light interact? How do interactions between coloured surfaces and coloured light influence the process of designing surface patterns? To critically examine the results of this research, textile and fashion design undergraduate students participated in a five-day workshop during which they experimented with, and reflected upon different types of interaction between coloured surfaces and coloured light in both physical and virtual reality. The students’ designs showed that the design method provided them with an understanding of the use of coloured light in their design processes through experimentation and individual exploration, demonstrating that this approach can make a fundamental contribution to the development of coloured light usage in various design disciplines.
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