A design method for metamaterials: 3D transversely isotropic lattice structures with tunable auxeticity

A method for designing 3D transversely isotropic auxetic lattice structures is proposed. Based on it, two new auxetic structures have been designed. Systematically, their effective elastic properties are investigated computationally and analytically in all loading directions. The effective Young's moduli and Poisson's ratios within the transverse plane and those along the longitudinal direction are widely tunable by tailoring the structural geometry. Both structures exhibit transverse and longitudinal auxeticities concurrently as well as separately. The proposed auxetic structures expand the existing auxetic material space in terms of elastic anisotropy.

State of Flux: Rescuing Nelson's Waterfront

<p>The neglected coastal edge of the port landscape has left behind unreceptive scars on the city’s urban fabric. These prominent locations are pivotal links between coastal towns and the sea; they are currently in very poor condition.¹ This thesis explores a site with these characteristics, Nelson, nestled between the Southern Alps at the top of New Zealand’s South Island. The compact and intimate geography of the Nelson region is surrounded by the ocean; with the city growing central to its port. Due to the once thriving local exports and industrial trade the port hastily expanded, the inevitable decline of the industrial era has resulted in a landscape of disregard which has distanced the city from the water. These neglected waterfront locations now taint the pristine image of the Nelson Haven. This thesis examines how a carefully considered architectural design can reintegrate this pivotal location back into the city’s urban fabric while reinforcing the relationship between the people of Nelson and the water. This design-led research utilises the sport of rowing with its link to the water as the catalyst to reconnect the people of Nelson to the waterfront and the water itself. This design-led thesis employs the ideologies of atmospheric experiences to materialise the importance of water to sense of place. This is achieved by exploiting the atmospheric experiences of material, space and time through an architectural dialogue with the water’s duality. The Nelson Haven experiences vast tidal movements which forms the foundations for the experience observed at the interface of architecture and water. This thesis further argues that this framework of architectural experience has the potential to serve as a catalyst project to rejuvenate and reintegrate the city of Nelson with its prime waterfront location. ¹ “Rutherford & Trafalgar Parks & Maitai Walkway” Nelson City Council. accessed July 15, 2015. http://nelson.govt.nz/assets/Leisure/Downloads/R-and-T-parks-redevelopment.pdf.</p>

State of Flux: Rescuing Nelson's Waterfront

<p>The neglected coastal edge of the port landscape has left behind unreceptive scars on the city’s urban fabric. These prominent locations are pivotal links between coastal towns and the sea; they are currently in very poor condition.¹ This thesis explores a site with these characteristics, Nelson, nestled between the Southern Alps at the top of New Zealand’s South Island. The compact and intimate geography of the Nelson region is surrounded by the ocean; with the city growing central to its port. Due to the once thriving local exports and industrial trade the port hastily expanded, the inevitable decline of the industrial era has resulted in a landscape of disregard which has distanced the city from the water. These neglected waterfront locations now taint the pristine image of the Nelson Haven. This thesis examines how a carefully considered architectural design can reintegrate this pivotal location back into the city’s urban fabric while reinforcing the relationship between the people of Nelson and the water. This design-led research utilises the sport of rowing with its link to the water as the catalyst to reconnect the people of Nelson to the waterfront and the water itself. This design-led thesis employs the ideologies of atmospheric experiences to materialise the importance of water to sense of place. This is achieved by exploiting the atmospheric experiences of material, space and time through an architectural dialogue with the water’s duality. The Nelson Haven experiences vast tidal movements which forms the foundations for the experience observed at the interface of architecture and water. This thesis further argues that this framework of architectural experience has the potential to serve as a catalyst project to rejuvenate and reintegrate the city of Nelson with its prime waterfront location. ¹ “Rutherford & Trafalgar Parks & Maitai Walkway” Nelson City Council. accessed July 15, 2015. http://nelson.govt.nz/assets/Leisure/Downloads/R-and-T-parks-redevelopment.pdf.</p>

Statistical Design of Biocarbon Reinforced Sustainable Composites from Blends of Polyphthalamide (PPA) and Polyamide 4,10 (PA410)

A full factorial design with four factors (the ratio of polyphthalamide (PPA) and polyamide 4,10 (PA410) in the polymer matrix, content percent of biocarbon (BioC), the temperature at which it was pyrolyzed and the presence of a chain extender (CE)), each factor with two levels (high and low), was carried out to optimize the mechanical properties of the resulting composites. After applying a linear model, changes in tensile strength, elongation at break and impact energy were not statistically significant within the considered material space, while the ones in the flexural modulus, the tensile modulus, density and heat deflection temperature (HDT) were. The two most influential factors were the content of BioC and its pyrolysis temperature, followed by the content of PPA. The affinity of PPA with a high-temperature biocarbon and the affinity of PA410 with a lower-temperature biocarbon, appear to explain the mechanical properties of the resulting composites. The study also revealed that the addition of CE hindered the mechanical properties. By maximizing the flexural modulus, tensile modulus and HDT, while minimizing the density, the optimal composite predicted is an 80 [PPA:PA410 (25:75)] wt% polymer composite, with 20 wt% of a BioC, pyrolyzed at a calculated 823 °C.

Ecocritical Analysis of Manto’s ‘Toba Tek Singh’: Re-Imaging Aesthetics of Place and Person

This in-depth analysis of the aesthetics of place and person in ‘Toba Tek Singh’, a famous short story by Saadat Hassan Manto, and a masterpiece of South Asian literature in English, presents a re-reading in the light of ecotheoretical concepts of ‘place’. It theorises how material space as ‘place’ is represented in literature and brings to light the hegemony of sociocultural discourses in relation to space, belittling its connection to nature. Ecotheory raises concerns of human and non-human life within the natural ecosystem of specific indigenous places. The protagonist of the story, Bishan Singh, ultimately also the namesake of a place, Toba Tek Singh, dies a terrible death while desperately searching for his native place. The article presents the story as a powerful literary attempt to re-imagine the places and spaces where we live and our relations to them.

Health, Identification and Pleasure: An Ethnographic Study on the Self-Management and Construction of Taijiquan Park Culture Space

The public space of a park is one of the most important carriers of social interaction and cultural practice in urban areas. Taking an ethnography of Taijiquan in Chengdu (China) as a case study, this article explores the production of Taijiquan’s “park culture space” (PCS). Our analysis revealed that the development of PCS not only transformed “public space” in the park to a “private space” through Taijiquan practice and exchange but also transformed “material space” in the park into “social space” with identification. We found that working on the process of self-managing Taijiquan’s “park culture space” included the democratic operation mechanism of communication and consultation, the cooperative operation mechanism of mutual benefit, and the incentive operation mechanism of balancing interests. Taijiquan’s “park culture space” was the reproduction of public space that was not only bonded with Taijiquan practice but was also reconstructed and expanded by Taijiquan practitioners. Furthermore, it involved the return of Taijiquan practitioners’ historical memory and collective life experience alongside the construction of Taijiquan practitioners’ group identity and the development of self-organization.

Metáfora "árvore do conhecimento" na pesquisa saúde infantil/ambiente na Amazônia

Descrever a aplicabilidade da dinâmica de criatividade e sensibilidade ‘árvore do conhecimento’ do método criativo sensível com enfermeiros que atendem crianças na atenção primária em região da Amazônia durante as queimadas. A metáfora da árvore materializada na produção artística com as questões geradoras de debate, possibilitou um ambiente acolhedor, descontraído, com coletivização das experiências, determinando material empírico vertical, profundo e coerente. O espaço foi catalizador de reflexões críticas sobre o papel social e profissional do enfermeiro, preocupado com a sustentabilidade frente às particularidades ambientais, o grupo infantil e sua família. A dinâmica se manifesta como estratégia alternativa de se construir uma epistemologia na enfermagem com olhar sensível para a interface saúde e ambiente. Trata-se de uma mudança paradigmática desafiadora para a ciência, ao respeitar o sujeito na sua singularidade e repensar um novo lugar para os atores sociais, não mais passivo, mas ativo e interativo na produção do conhecimento.Descritores: Criatividade, Conhecimento, Enfermeiros, Ambiente. Metaphor “tree of knowledge” in child health/environment research in the AmazonAbstract: Describe the applicability of the creativity and sensitivity dynamics tree of knowledge of the sensitive creative method with nurses who care for children in primary care in the Amazon region during fires. The metaphor of the tree materialized in artistic production with the questions that generate debate, enabled a welcoming, relaxed environment, with collectivization of experiences, determining empirical vertical, deep and coherent material. Space was a catalyst for critical reflections on the social and professional role of nurses, concerned with sustainability in the face of environmental particularities, the child group, and their family. The dynamics manifest themselves as an alternative strategy to build an epistemology in nursing with a sensitive look at the interface between health and the environment. It is a challenging paradigmatic change for science, by respecting the subject in its uniqueness and rethinking a new place for social actors, no longer passive, but active and interactive in the production of knowledge.Descriptors: Creativity, Knowledge, Nurses, Environment. Metáfora “árbol del conocimiento” en la investigación de salud infantil/medio ambiente en la AmazoníaResumen: Describa la aplicabilidad de la dinámica de la creatividad y la sensibilidad del “árbol del conocimiento" del método creativo sensible con enfermeras que asisten a niños en atención primaria en la región amazónica durante los incendios. La metáfora del árbol materializada en la producción artística con las preguntas que generan debate, permitió un ambiente acogedor, relajado, con colectivización de experiencias, determinando material empírico vertical, profundo y coherente. El espacio fue un catalizador para reflexiones críticas sobre el papel social y profesional del enfermero, preocupado por la sostenibilidad frente a las particularidades ambientales, el grupo infantil y su familia. La dinámica se manifiesta como una estrategia alternativa para construir una epistemología en enfermería con una mirada sensible a la interfaz entre la salud y el medio ambiente. Es un cambio paradigmático desafiante para la ciencia, al respetar el tema en su singularidad y repensar un nuevo lugar para los actores sociales, ya no pasivos, sino activos e interactivos en la producción de conocimiento.Descriptores: Creatividad, Conocimiento, Enfermeros, Ambiente.

Development trend of urban design in “digital age”: Pan-dimensionality and individual-ubiquity

The wave of “digital age” featuring digital information is coming. Digital technology is profoundly changing the societal development direction and evolution paths. It also has significant bearing on production modes, social interactions and lifestyles. With regard to urban design, a system of knowledge about the creation and adaptation of material space forms that integrate humanities, art, technology and materials, digital technology has provided it with a brand-new and revolutionary scientific impetus for its evolution. The result of this evolution is “digital urban design paradigm based on human-computer interaction”, i.e., the urban development is moving toward “pan-dimensionality” and “individual ubiquity”. The future of urban design will construct a new approach to urban research and engineering, which is more complex, capable of accommodating and compatible with multiple goals of “instrumental rationality” and “value rationality”. Such a new approach shall be led by the probabilistic theory of “gray scale thinking”, reflecting quaternary synergetic view of “scientific rationality, ecological rationality, cultural rationality and technical rationality” to realize the cognitive progress of “engineering for the benefit of mankind”.

Pengembangan Alat Evaluasi melalui Aplikasi Kahoot Materi Karaktekteristik Ruang dan Pemanfaatan Sumber Daya Alam dengan Penguatan Karakter Mandiri Kelas IV Mi.Rn

Research on the development of evaluation tools kahoot the application of material space spatial characteristics and the utilization of natural resource themes with the Strengthening of Independent Character class IV MI.RN are valid according to material experts, media experts, as well as practical for teachers and students. The method used is a 10-step model from Borg and Gall. Evaluation tools through the application of kahoot have produced a percentage value of 93.33 percent material experts, 100 percent media experts and 97.5 percent user (teacher). Abstrak: Penelitian pengembangan alat evaluasi melalui aplikasi kahoot materi karakteristik ruang dan pemanfaatan sumber daya alam tema dengan Penguatan Karakter Mandiri kelas IV MI.RN yang valid menurut ahli materi, ahli media, serta praktis bagi guru dan siswa. Metode yang digunakan adalah 10 langkah model dari Borg and Gall. Alat evaluasi melalui apikasi kahoot telah menghasilkan nilai persentase dari ahli materi 93,33 persen, ahli media 100 persen dan pengguna (guru) 97,5 persen.

Optimal and continuous multilattice embedding

Because of increased geometric freedom at a widening range of length scales and access to a growing material space, additive manufacturing has spurred renewed interest in topology optimization of parts with spatially varying material properties and structural hierarchy. Simultaneously, a surge of micro/nanoarchitected materials have been demonstrated. Nevertheless, multiscale design and micro/nanoscale additive manufacturing have yet to be sufficiently integrated to achieve free-form, multiscale, biomimetic structures. We unify design and manufacturing of spatially varying, hierarchical structures through a multimicrostructure topology optimization formulation with continuous multimicrostructure embedding. The approach leads to an optimized layout of multiple microstructural materials within an optimized macrostructure geometry, manufactured with continuously graded interfaces. To make the process modular and controllable and to avoid prohibitively expensive surface representations, we embed the microstructures directly into the 3D printer slices. The ideas provide a critical, interdisciplinary link at the convergence of material and structure in optimal design and manufacturing.