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.
Design, Mechanical engineering, Bioengineering, 3-D printing, design of flexible medical devices, finite element analysis, optimization, polypropylene, and viscoelastic material modeling
Endoscopic submucosal dissection (ESD) is a tissue removal technique in minimally invasive surgical treatment for cancers. According to the American Society for Gastrointestinal Endoscopy (ASGE), an advanced ESD training is necessary for surgeons because ESD incision techniques are difficult. The learning curve is steep and these procedures require dedicated time and effort. With the current ESD procedure, it is difficult for the surgeon to keep a clear view of the submucosal layer. Having a flexible robotic ESD device can improve the performance of a surgeon in such a complex environment.The goal of this project is to design, manufacture, and analyze an overtube prototype for endoscopic surgery. 3-D printable polypropylene is used to manufacture a flexible overtube to be used in minimally invasive surgery. Finite element studies are implemented to evaluate the performance of the overtube and to speed up the design process. Eight unknown linear viscoelastic constants of polypropylene are identified through experimental measurements of the stress-strain characteristics using 3-D printed polypropylene specimens. The material parameters are implemented into a finite element model of a 3-D printed overtube prototype to simulate the structure.
Adaptive Optics for Extremely Large Telescopes 4 – Conference Proceedings, vol 1, iss 1
Active optics, adaptive optics, Giant Magellan Telescope, phasing, and dispersed fringe sensor
The future diffraction-limited performance of the 25.4 meter Giant Magellan Telescope (GMT) will rely on the activeand adaptive wavefront sensing measurements made by the Acquisition, Guiding, and Wavefront Sensor (AGWS)currently being designed by SAO. One subsystem of the AGWS, the phasing camera, will be responsible for measuringthe piston phase difference between the seven GMT primary/secondary segment pairs to 50 nm accuracy with full skycoverage using natural guide stars that are 6-10 arcmin off-axis while the on-axis light is used for science operations.The phasing camera will use a dispersed fringe sensor to measure the phase difference in rectangular subaperturesspanning the gaps between adjacent mirror segments. The large gap between segments (>295 mm, compared to 3 mmfor the Keck telescope) reduces the coherence of light across the subapertures, making this problem particularlychallenging. In support of the AGWS phasing camera technical goals, SAO has undertaken a series of prototypingefforts at the Magellan 6.5 meter Clay telescope to demonstrate the dispersed fringe sensor technology and validateatmospheric models. Our latest on-sky test, completed in December 2015, employs a dual-band (I and J) dispersedfringe sensor. This prototype uses an adaptive optics corrected beam from the Magellan AO adaptive secondary system.The system operates both on-axis and 6 arcmin off-axis from the natural guide star feeding the MagAO wavefrontsensor. This on-sky data will inform the development of the AGWS phasing camera design towards the GMT first light.
Caballero Codina, Víctor, Vernet Bellet, David, Zaballos Diego, Agustín, Corral Torruella, Guiomar, and Universitat Ramon Llull. La Salle
RECERCAT (Dipòsit de la Recerca de Catalunya), 2018
Xarxes de sensors and Internet de les coses
Sensor networks and the Internet of Things have driven the evolution of traditional electric power distribution networks towards a new paradigm referred to as Smart Grid. However, the different elements that compose the Information and Communication Technologies (ICTs) layer of a Smart Grid are usually conceived as isolated systems that typically result in rigid hardware architectures which are hard to interoperate, manage, and to adapt to new situations. If the Smart Grid paradigm has to be presented as a solution to the demand for distributed and intelligent energy management system, it is necessary to deploy innovative IT infrastructures to support these smart functions. One of the main issues of Smart Grids is the heterogeneity of communication protocols used by the smart sensor devices that integrate them. The use of the concept of the Web of Things is proposed in this work to tackle this problem. More specifically, the implementation of a Smart Grid’sWeb of Things, coined as theWeb of Energy is introduced. The purpose of this paper is to propose the usage of Web of Energy by means of the Actor Model paradigm to address the latent deployment and management limitations of Smart Grids. Smart Grid designers can use the Actor Model as a design model for an infrastructure that supports the intelligent functions demanded and is capable of grouping and converting the heterogeneity of traditional infrastructures into the homogeneity feature of theWeb of Things. Conducted experimentations endorse the feasibility of this solution and encourage practitioners to point their efforts in this direction.
Martín de Pozuelo, Ramon, Zaballos Diego, Agustín, Navarro Martín, Joan, Corral Torruella, Guiomar, and Universitat Ramon Llull. La Salle
RECERCAT (Dipòsit de la Recerca de Catalunya), 2017
Internet de les coses, Ordinadors, Xarxes d', and Ordinadors, Xarxes d' -- Mesures de seguretat
The smart grid can be seen as a hybrid system composed by many systems. From a large scale point of view, it combines the electric power system itself and a heterogeneous information and communication technology (ICT) infrastructure. Additionally, these systems are composed by many building blocks that are designed and managed as separated systems which are hard to fully integrate between each other. Relying on the experiences arisen and the knowledge gathered from the partners during the development of the FP7 European projects INTEGRIS (intelligent electrical grid sensor communications) and FINESCE (future internet smart utility services), this paper presents the software defined utility (SDU) concept for the management of the smart grid and its security, which advocates for the migration of the utility infrastructure to software systems instead of relying on complex and rigid hardware based systems. Following this approach, SDU proposes the evolution of power systems’ ICT and the usage of programmable commodity hardware, low-cost sensors, and reliable high-speed IP-based communications underneath. More concretely, this paper proposes some building blocks for the deployment of the SDU (flexible data management infrastructure, context-aware security and web of things interface) and evaluates their functionalities and benefits for the smart grids of the future