Sarah Turner - eco-artist and designer through craft-based upcycling

Sarah Turner is an eco-artist and designer who practices craft-based upcycling with waste plastic bottles and cans to create lighting, sculpture and decorative home interior products. Since 1998, her enthusiasm, creativity and good will have allowed her to gain several high-profile client commissions and to win awards from design, innovation and business competitions. The aim of this portrait is to introduce Sarah’s work and shed light on the resources, knowledge and skills involved in her practice and on the barriers to and drivers for her craft-based upcycling. We consider that Sarah’s work could be one of the stepping stones for a shift towards more sustainable craft practice, both in the United Kingdom and beyond. By exploring the right ingredients for craft-based upcycling, barriers liable to be faced and key drivers that stimulate motivation, we hope that this portrait will inspire and attract more designers and makers to embed upcycling in their future practice

An exploratory study on the links between individual upcycling, product attachment and product longevity

Product attachment, the emotional bond experienced with a product, is an emerging concept for sustainable production and consumption. The logic behind it is that when people are attached to any product, they are more likely to handle the product with care and to postpone its replacement or disposal. Some types of product have been studied regarding product attachment in past research but the focus has been on the perspectives of professional designers and manufacturers rather than on consumers’ ‘everyday creativity’ activities such as ‘individual upcycling’. Individual upcycling, creation out of used materials resulting in a higher quality or value product than the compositional elements, is particularly relevant to product attachment. This is because upcycling, as a creative, participatory user activity, may offer the experiences of self-expression, group affiliation, special memories and pleasure, all of which are possible product attachment determinants

Individual upcycling practice: exploring the possible determinants of upcycling based on a literature review

Individual upcycling – the creation or creative modification of any product out of used materials in an attempt to generate a product of higher quality or value than the compositional elements – has recently been advocated by many as a means to reduce waste, yet is still marginal. Considering the implied benefit to sustainable production and consumption, the most relevant question at this point may be how to scale up this marginal practice into mainstream practice to make a bigger impact in society and environment. In order to generate effective scaling-up strategies for change, it is essential to understand the determinants of upcycling (i.e. what drives and facilitates it). This paper reviews relevant contemporary literature and identifies a set of determinants. The synthesized result, despite its partiality, shows possible examples of design and policy implications for scaling-up, and leads to future research suggestions

Polymer Release out of a Spherical Vesicle through a Pore

Translocation of a polymer out of curved surface or membrane is studied via mean first passage time approach. Membrane curvature gives rise to a constraint on polymer conformation, which effectively drives the polymer to the outside of membrane where the available volume of polymer conformational fluctuation is larger. Considering a polymer release out of spherical vesicle, polymer translocation time $\tau$ is changed to the scaling behavior $\tau\sim L^2$ for $R<R_G$, from $\tau\sim L^3$ for $R\gg R_G$, where $L$ is the polymer contour length and $R$, $R_G$ are vesicle radius and polymer radius of gyration respectively. Also the polymer capture into a spherical budd is studied and possible apparatus for easy capture is suggested.Comment: 14 pages RevTeX, 6 postscript figures, published in Phys. Rev. E 57, 730 (1998

On equivalence of discrete-discrete and continuum-discrete design sensitivity analysis

Developments in design sensitivity analysis (DSA) method have been made using two fundamentally different approaches as shown. In the first approach, a discretized structural finite element model is used to carry out DSA. There are three different methods in the discrete DSA approach: finite difference, semi-analytical, and analytical methods. The finite difference method is a popular one due to its simplicity, but a serious shortcoming of the method is the uncertainty in the choice of a perturbation step size of design variables. In the semi-analytical method, the derivatives of stiffness matrix is computed by finite differences, whereas in the analytical method, the derivatives are obtained analytically. For the shape design variable, computation of analytical derivative of stiffness matrix is quite costly. Because of this, the semi-analytical method is a popular choice in discrete shape DSA approach. However, recently, Barthelemy and Haftka presented that the semi-analytical method can have serious accuracy problems for shape design variables in structures modeled by beam, plate, truss, frame, and solid elements. They found that accuracy problems occur even for a simple cantilever beam. In the second approach, a continuum model of the structure is used to carry out DSA

An exploratory study on the consequences of individual upcycling: is it worth making people feel attached to their upcycled products?

Product attachment, the emotional bond experienced with a product, is an emerging concept for sustainable production and consumption. The logic behind it is that when people are attached to any product, they are more likely to postpone its replacement or disposal. Some types of product have been studied regarding product attachment in past research but the focus has been on manufacturers ’ perspectives rather than on consumers’ ‘everyday creativity’ activities such as ‘individual upcycling’. Individual upcycling, creation or modification out of used materials resulting in a higher quality or value product than the composition al elements, is particularly relevant to product attachment. This is because upcycling, as a creative, engaging user activity, may offer the experiences of self-expression, group affiliation, special memories and pleasure, all of which are possible product attachment determinants. In the meantime, recent evidence suggests that the number of people who upcycle things has increased, possibly as a response to the contemporary ‘Maker Movement’ and aided by physical and digital resources. Despite this growth, individual upcycling has not been investigated extensively, especially its relation to product attachment and product longevity. Acknowledging this, this study investigated the consequences of individual upcycling with respect to product attachment and the product longevity of upcycled products, and compared the results with mass-produced products with the same functions through an exploratory questionnaire with 23 UK-based upcycling practitioners. The results demonstrated that the attachment to upcycled products is positively correlated with irreplaceability, and irreplaceability with product care and expected product longevity. The results also showed that the expected product lifetime years of the upcycled product with attachment are longer than the estimated average product lifetime years of the mass-produced products with the same functions

Mode-medium instability and its correction with a Gaussian reflectivity mirror

A high power CO2 laser beam is known to deteriorate after a few microseconds due to a mode-medium instability (MMI) which results from an intensity dependent heating rate related to the vibrational-to-translational decay of the upper and lower CO2 lasing levels. An iterative numerical technique is developed to model the time evolution of the beam as it is affected by the MMI. The technique is used to study the MMI in an unstable CO2 resonator with a hard-edge output mirror for different parameters like the Fresnel number and the gas density. The results show that the mode of the hard edge unstable resonator deteriorates because of the diffraction ripples in the mode. A Gaussian-reflectivity mirror was used to correct the MMI. This mirror produces a smoother intensity profile which significantly reduces the effects of the MMI. Quantitative results on peak density variation and beam quality are presented