Blum, David, Jorissen, Filip, Huang, Sen, Arroyo, Javier, Benne, Kyle, Li, Yanfei, Gavan, Valentin, Rivalin, Lisa, Helsen, Lieve, Vrabie, Draguna, Wetter, Michael, and Sofos, Marina
Advanced control strategies are becoming increasinglynecessary in buildings in order to meet and balancerequirements for energy efficiency, demand flexibility,and occupant comfort. Additional development andwidespread adoption of emerging control strategies,however, ultimately require low implementation costs toreduce payback period and verified performance to gaincontrol vendor, building owner, and operator trust. Thisis difficult in an already first-cost driven and risk-averseindustry. Recent innovations in building simulation cansignificantly aid in meeting these requirements andspurring innovation at early stages of development byevaluating performance, comparing state-of-the-art tonew strategies, providing installation experience, andtesting controller implementations. This paper presentsthe development of a simulation framework consisting oftest cases and software platform for the testing ofadvanced control strategies (BOPTEST - BuildingOptimization Performance Test). The objectives andrequirements of the framework, components of a test case,and proposed software platform architecture aredescribed, and the framework is demonstrated with aprototype implementation and example test case.
Sound and Habitat Audio Prototyping Environment (SHAPE) is a collection of nature-inspired electroacoustic devices created for sound art in public spaces. It is part of an audio feedback research project at the Center for New Music and Audio Technologies (CNMAT). By repurposing discarded electronics and manufactured objects, low-cost materials are used to make interactive sound sculptures and novel music instruments. Subtle gestures and actions by participants change the sound in real time. The project attempts to question the dichotomy between sound art and common environmental sounds through a zero-waste, collective action framework. With SHAPE, natural and artificial materials converge; construction and deconstruction hold equal weight; raw materials reclaim another existence; and sounds from unusual sources expand into fully resonating bodies. Audio transfer is based on two input types for each device: a piezoelectric contact mic and an electret air mic. These elements combine to sense both vibration in material and pressure waves in the air. Sound energy is then converted into an analog and a digital signal. Both analog and digital electronic environments are highly programmable, allowing for quick on-site prototyping. Six devices from this project will be highlighted and described in detail. Aside from the PCB fabrication, smartphone, and case construction, all of the e-components for these devices can be easily found in old discarded speaker systems and reused. Proprietary devices such as the iRig are currently being used, but these will be reverse engineered for future open-access integration. Open-source software such as Pure Data and MobMuPlat make any Android or iOS device compatible with this system, thus facilitating second-hand use of virtually all smartphone models. Considering the portability and cost effectiveness of this project, SHAPE is particularly adept at facilitating outdoor applications such as sound installations or musical performances.
Chung, Philip, Heller, J Alex, Etemadi, Mozziyar, Ottoson, Paige E, Liu, Jonathan A, Rand, Larry, and Roy, Shuvo
Vagina, Humans, Silicone Elastomers, Equipment and Supplies, Computer-Aided Design, Female, Printing, Three-Dimensional, Bioengineering, Issue 88, liquid injection molding, reaction injection molding, molds, 3D printing, fused deposition modeling, rapid prototyping, medical devices, low cost, low volume, rapid turnaround time, Printing, Three-Dimensional, Cognitive Sciences, Biochemistry and Cell Biology, and Psychology
Biologically inert elastomers such as silicone are favorable materials for medical device fabrication, but forming and curing these elastomers using traditional liquid injection molding processes can be an expensive process due to tooling and equipment costs. As a result, it has traditionally been impractical to use liquid injection molding for low-cost, rapid prototyping applications. We have devised a method for rapid and low-cost production of liquid elastomer injection molded devices that utilizes fused deposition modeling 3D printers for mold design and a modified desiccator as an injection system. Low costs and rapid turnaround time in this technique lower the barrier to iteratively designing and prototyping complex elastomer devices. Furthermore, CAD models developed in this process can be later adapted for metal mold tooling design, enabling an easy transition to a traditional injection molding process. We have used this technique to manufacture intravaginal probes involving complex geometries, as well as overmolding over metal parts, using tools commonly available within an academic research laboratory. However, this technique can be easily adapted to create liquid injection molded devices for many other applications.