Este trabalho analisa o uso de interfaces físicas digitais na criação e performance da música eletroacústica em tempo real, sobretudo pelo conceito de gesto musical. Para tal propósito, primeiramente, foi realizado um estudo sistemático de dois objetos centrais para pesquisa, a saber, as interfaces digitais e o conceito de gesto em música. Revisitamos alguns elementos sobre a construção de instrumentos musicais digitais, acrescentado novas perspectivas à luteria digital a partir da concepção de gesto musical, como por exemplo, na concepção de mapeamento. Além disso, levantamos algumas questões estéticas referentes tanto a compreensão destas interfaces como instrumentos musicais quanto seu uso na composição musical e na performance do live electronics. O conceito de gesto musical, por usa vez, é compreendido neste trabalho como uma questão emergente da prática musical na contemporaneidade. Apontamos para os diferentes entendimentos das pesquisas em música sobre os significados contidos neste conceito, como suas dimensões corporal e sonora e suas capacidades cinética e semântica. Assim, expandimos o conceito de gesto musical em um contexto que utiliza estas interfaces para ideias como as de corporalidade, fisicalidade e causalidade. Posteriormente, propomos a junção entre os elementos presentes no conceito de gesto musical com os elementos constitutivos das interfaces e com a prática de criação musical e performance mediada por elas, principalmente sobre o ponto de vista da causalidade. Desta maneira reconhecemos que o relacionamento entre as ações corporais e os movimentos sonoros contribuem para a significação musical nas práticas que utilizam interfaces físicas digitais. Identificamos que estas relações de causalidade podem se apresentar desde modelos físico-naturais de coerência gestual, como em relações artificiais entre gesto e som e seus substituintes. Finalmente, é apresentada uma metodologia de análise para performances que utilizam estas interfaces, como aqui compreendidas, que contemplam tanto como a interface se apresenta para o músico que a toca quanto como a relação entre performer e interface podem ser compreendidas pelo espectador-ouvinte. Estas proposições demonstram como as interfaces estão inseridas em um contexto que considera o corpo como um elemento estético na criação da música eletroacústica ao vivo. / This research analyzes the use of digital physical interfaces in the creation and performance of electroacoustic music in real time, especially the concept of musical gesture. For this purpose, first, we conducted a systematic study of two central objects for research, namely, digital interfaces and the concept of gesture in music. We revisit some core elements of the construction of digital musical instruments, added new perspectives to digital luthiery from the concept of musical gesture as the mapping. In addition, we raised some aesthetic issues both an understanding of these interfaces as musical instruments as their use in musical composition and performance of live electronics. The concept of musical gesture, in turn, is understood in this study as an emerging issue of musical practice nowadays. We pointed to the different understandings of research in music about the meanings contained in this concept, as body and sound dimensions and kinetic and semantic capabilities. Thus, we have expanded the concept of musical gesture in a context that uses these interfaces to ideas such as corporeality, physicality and causality. Subsequently, we propose the junction between the elements present in the concept of musical gesture with the constituent elements of the interfaces and the practice of music creation and performance mediated by them, especially on the point of view of causality. Thus we recognize that the relationship between bodily actions and sound movements contribute to the musical significance in practices that use digital physical interfaces. We identify that these causal relationships may present from physical and natural models of gestural coherence, as artificial relationship between gesture and sound and their surrogates Finally, it is presented a methodology for performances that use these interfaces, as here understood, which include both how the interface is presented to the musician that plays much like the relationship between performer and interface can be understood by the viewer-listener. These proposals demonstrate how the interfaces are inserted in a context that considers the body as an aesthetic element in the practice of the live electroacoustic music.

Este trabalho analisa o uso de interfaces físicas digitais na criação e performance da música eletroacústica em tempo real, sobretudo pelo conceito de gesto musical. Para tal propósito, primeiramente, foi realizado um estudo sistemático de dois objetos centrais para pesquisa, a saber, as interfaces digitais e o conceito de gesto em música. Revisitamos alguns elementos sobre a construção de instrumentos musicais digitais, acrescentado novas perspectivas à luteria digital a partir da concepção de gesto musical, como por exemplo, na concepção de mapeamento. Além disso, levantamos algumas questões estéticas referentes tanto a compreensão destas interfaces como instrumentos musicais quanto seu uso na composição musical e na performance do live electronics. O conceito de gesto musical, por usa vez, é compreendido neste trabalho como uma questão emergente da prática musical na contemporaneidade. Apontamos para os diferentes entendimentos das pesquisas em música sobre os significados contidos neste conceito, como suas dimensões corporal e sonora e suas capacidades cinética e semântica. Assim, expandimos o conceito de gesto musical em um contexto que utiliza estas interfaces para ideias como as de corporalidade, fisicalidade e causalidade. Posteriormente, propomos a junção entre os elementos presentes no conceito de gesto musical com os elementos constitutivos das interfaces e com a prática de criação musical e performance mediada por elas, principalmente sobre o ponto de vista da causalidade. Desta maneira reconhecemos que o relacionamento entre as ações corporais e os movimentos sonoros contribuem para a significação musical nas práticas que utilizam interfaces físicas digitais. Identificamos que estas relações de causalidade podem se apresentar desde modelos físico-naturais de coerência gestual, como em relações artificiais entre gesto e som e seus substituintes. Finalmente, é apresentada uma metodologia de análise para performances que utilizam estas interfaces, como aqui compreendidas, que contemplam tanto como a interface se apresenta para o músico que a toca quanto como a relação entre performer e interface podem ser compreendidas pelo espectador-ouvinte. Estas proposições demonstram como as interfaces estão inseridas em um contexto que considera o corpo como um elemento estético na criação da música eletroacústica ao vivo. / This research analyzes the use of digital physical interfaces in the creation and performance of electroacoustic music in real time, especially the concept of musical gesture. For this purpose, first, we conducted a systematic study of two central objects for research, namely, digital interfaces and the concept of gesture in music. We revisit some core elements of the construction of digital musical instruments, added new perspectives to digital luthiery from the concept of musical gesture as the mapping. In addition, we raised some aesthetic issues both an understanding of these interfaces as musical instruments as their use in musical composition and performance of live electronics. The concept of musical gesture, in turn, is understood in this study as an emerging issue of musical practice nowadays. We pointed to the different understandings of research in music about the meanings contained in this concept, as body and sound dimensions and kinetic and semantic capabilities. Thus, we have expanded the concept of musical gesture in a context that uses these interfaces to ideas such as corporeality, physicality and causality. Subsequently, we propose the junction between the elements present in the concept of musical gesture with the constituent elements of the interfaces and the practice of music creation and performance mediated by them, especially on the point of view of causality. Thus we recognize that the relationship between bodily actions and sound movements contribute to the musical significance in practices that use digital physical interfaces. We identify that these causal relationships may present from physical and natural models of gestural coherence, as artificial relationship between gesture and sound and their surrogates Finally, it is presented a methodology for performances that use these interfaces, as here understood, which include both how the interface is presented to the musician that plays much like the relationship between performer and interface can be understood by the viewer-listener. These proposals demonstrate how the interfaces are inserted in a context that considers the body as an aesthetic element in the practice of the live electroacoustic music.

Abstract Mixed media, as artful assemblages of digital objects and physical artefacts, provide distinctive opportunities for experiential, presentational and representational interaction. In project-based learning of architecture design, participants staged spatial narratives with multiple projections, performed mixed objects and artefacts, and exploited bodily movements in mixed representations. These cases show how physical interfaces in mixed media acquire a spatial dimension, integrate physical artefacts and bodily movements and propose configurability as a central feature. A perspective based on anthropological concepts of performance makes it possible to address these aspects in a coherent way, pointing to sense experience, the individuality and collective emergence of expression and its diachronic and event-like character. From this perspective, interaction is part of expressive events aimed at generating new insights for participants (interchangeable performers and spectators) privileging sense experience. Events are the outcome of configurations of space, artefacts and digital media, and are characterised by a simultaneousness of doing and undergoing, of bodily presence and representation. More importantly, the performance perspective suggests a particular temporal view of interaction, based on the concept of event, addressing a neglected granularity of analysis between the moment-by-moment unfolding of interaction and the longer term co-evolution of technology and practice. Implications of interaction as performance contribute to a wider program of interaction design, thereby providing alternatives to established human-computer interaction tenets: the notion of event is an alternative to the notion of task; perception in Dewey's terms replaces recognition proposing expression as an alternative to accountability and usability. Implications include looking at how space can be configured and staged instead of measured or simulated, and how situations can be staged instead of sensed and recognised, privileging the sensing human over the sensing system.

In a digital and fast-paced world, museums are constantly updating their practices to support visitors’ experiences and interactive exhibits are increasingly gaining popularity. I collaborated with the Natural History Museum of Denmark to design an interactive room for their upcoming new building, specifically for the exhibit with the working title “Night in the Open Land”. The project adopted a design methodology that focused on playfulness and senses and included experience prototyping with museum visitors. The final prototype was designed to replicate a slow and contemplative experience of being outside at night. A playful interactive flashlight was used to find hidden animals and interact with the exhibition, enhancing exploration. The torchlight and the sounds and movements of visitors served as input for an interactive system, which produced sounds, video and smell as outputs. The flashlight enhanced the playful and explorative aspect of the room and allowed for shared and focused attention by all family members. Furthermore, olfactory stimuli were highly appreciated by visitors. At the intersection between museum studies and Interaction Design, this project is relevant to Interaction-as-Experience and reinforces how multisensory interactive exhibits are effective in catering to diverse audiences. The results of this project suggest that incorporating interaction design into public spaces like museums can enhance visitors’ experiences, fostering engagement, learning, and enjoyment.

The high specific energy consumption from all existing seawater desalination methods has heightened the motivation for having more efficient and greener desalination processes to meet the future goals of sustainable seawater desalination. One of the promising thermally-driven desalination methods is the direct-contact spray evaporation and condensation (DCSEC) where the excess enthalpy between feed and equilibrium states of evaporator chambers is exploited with reasonably high flashing efficiency. Further improvements in energy efficacy of DCSEC are boosted by firstly the incorporation of micro/nano-bubbles (M/NB) where micro or nano size subcooled vapor are embedded in the sprayed liquid droplets of evaporator, thereby lowering the temperature brine in evaporator and minimizing the thermal equilibrium effect of brine. The presence of subcooled bubbles increased the available surface area for heat transfer. Secondly, the concept of an evaporator-condenser pair of DCSEC could be extended to a multi-stage arrangement where the latent heat of vapor condensing on the water droplets sprayed within the condenser is recovered. From the experiments, the effect of incorporating the (M/NB) in the DCSEC at optimum feed flow rate yields more than 34% increase in distillate production at feed temperatures greater 47oC and the cooling inlet temperature set at 35oC. The other salient improvement found from the experiments is the increase in performance ratio (PR) up to 3.3 for a 6-stage configuration. This quantum jump in the PR is attributed to the heat recovery effect by as much as 70% of the total heat input. Arising from the DCSEC design, the implicit benefits are the low capital and operational cost, i.e., low CAPEX and OPEX. The former savings is attributed zero physical interfaces such as tube-based heat exchangers or membranes, whilst the latter savings is contributed by significant lesser use of chemicals in the pre-treatment of seawater feed. Lastly, the accompanied benefit is the robustness of the DCSEC processes where it could within stand high salinity of the brine, typically as high as 200,000 ppm.