RAPID prototyping, CURRENT-voltage characteristics, and FEEDBACK (Psychology)

Using a photovoltaic (PV) emulator (PVE) simplifies the testing of the PV generation system. However, conventional controllers used for PVEs suffer from oscillating output voltage, requiring a high number of iterations, or being too complex to be implemented. This paper proposes a controller based on a resistance feedback control strategy that produces a stable and fast converging operating point for the PVE. The resistance feedback control strategy requires a new type of PV model, which is the current–resistance (I–R) PV model. This model is computed using a binary search method at a fast convergence rate. It is combined with a closed-loop buck converter using a proportional-integral controller to form the resistance feedback control strategy. The PVE's controller is implemented into dSPACE ds1104 hardware platform for experimental validation. The acquired experimental results show that the proposed PVE is able to follow the current–voltage characteristic of the PV module accurately. In addition, the PVE's efficiency is more than 90% under maximum power point operation. The transient response of the proposed PVE is similar to the PV panel during irradiance changes. [ABSTRACT FROM AUTHOR]

Social Sciences, Economics and Business, Samhällsvetenskap, Ekonomi och näringsliv, Social and Economic Geography, Social och ekonomisk geografi, Oceans, Fisheries, Global change, Complex adaptive systems, Scenarios, and Science fiction prototyping

Scenarios can help individuals, communities, corporations and nations to develop a capacity for dealing with the unknown and unpredictable, or the unlikely but possible. A range of scientific methods for developing scenarios is available, but we argue that they have limited capacity to investigate complex social-ecological futures because: 1) non-linear change is rarely incorporated and: 2) they rarely involve co-evolutionary dynamics of integrated social-ecological systems. This manuscript intends to address these two concerns by applying the method of science fiction prototyping to developing scenarios for the future of global fisheries in a changing global ocean. We used an empirically informed background on existing and emerging trends in marine natural resource use and dynamics to develop four 'radical ocean futures,' incorporating and extrapolating from existing environmental, technological, social and economic trends. We argue that the distinctive method as applied here can complement existing scenario methodologies and assist scientists in developing a holistic understanding of complex systems dynamics. The approach holds promise for making scenarios more accessible and interesting to non-academics and can be useful for developing proactive governance mechanisms.

TARGET costing, PROTOTYPES, PRODUCT design, RAPID prototyping, and SUPPLIERS

Prototyping allows firms to evaluate the technical feasibility of alternative product designs and to better estimate their costs. We study a collaborative prototyping scenario in which a manufacturer involves a supplier in the prototyping process by letting the supplier make detailed design choices for critical components and provide prototypes for testing. While the supplier can obtain private information about the costs, the manufacturer uses target costing to gain control over the design choice. We show that involving the supplier in the prototyping process has an important influence on the manufacturer's optimal decisions. The collaboration results in information asymmetry, which makes parallel prototyping less attractive and potentially reverses the optimal testing sequence under sequential prototyping: It may be optimal to test designs in increasing order of attractiveness to avoid that the supplier does not release technically and economically feasible prototypes for strategic reasons. We also find that the classical target costing approaches (cost‐ and market‐based) need to be adjusted in the presence of alternative designs: Due to the strategic behavior of suppliers, it is not always optimal to provide identical target costs for designs with similar cost and performance estimates, nor to provide different target costs for dissimilar designs. Furthermore, the timing is important: While committing upfront to carefully chosen target costs reduces the supplier's strategic behavior, in some circumstances, the manufacturer can take advantage of this behavior by remaining flexible and specifying the second prototype's target costs later. [ABSTRACT FROM AUTHOR]

RAPID prototyping, SEARCH algorithms, DIELECTRIC-loaded antennas, THREE-dimensional printing, and PERMITTIVITY

A prototyping method for dielectrically loaded antennas is presented. Dielectric loading has been used with horn antennas, feeds, and lenses. Dielectrics have also been used for coating antennas submerged in water and biological matter and have led to improvements in bandwidth and efficiency as well as antenna miniaturisation. The authors present a new technique to produce variable dielectrics with permittivity from 6 to 28 using two commonly available powders, titanium dioxide (used in foods) and magnesium silicate (used in talcum powder). An example spherical helical ball antenna is used to demonstrate the process. In this antenna, the mixed powders were encased in a 3D printed shell that achieved a reduction in diameter of the spherical antenna by a factor of 1.85. The technique aids rapid prototyping and optimisation using search algorithms. [ABSTRACT FROM AUTHOR]

RAPID prototyping, ARTIFICIAL neural networks, INDUCTION machinery, INDUCTION motors, NEURAL networks (Neurobiology), and KALMAN filtering

This paper presents a discrete-time neural inverse optimal control for induction motors, which is implemented on a rapid control prototyping (RCP) system using a C2000 Microcontroller-Simulink platform. Such controller addresses the solution of three issues: system identification, trajectory tracking, and state estimation, which are solved independently. The neural controller is based on a recurrent high order neural network (RHONN), which is trained with an extended Kalman filter. The RHONN is an identifier to obtain an accurate motor model, which is robust to external disturbances and parameter variations. The inverse optimal controller is used to force the system to track a desired trajectory and to reject undesired disturbances. Moreover, the controller is based on a neural model and does not need the a-priori knowledge of motor parameters. A supertwisting observer is implemented to estimate the rotor magnetic fluxes. The hub of the RCP system is a TMS320f28069M MCU, which is an embedded combination of a 32-bit C28x DSP core and a real-time control accelerator. This Microcontroller is fully programmable from the Simulink environment. Simulation and experimental results illustrate the performance of the proposed controller and the RCP system, and a comparison with a control algorithm without the neural identifier is also included. [ABSTRACT FROM AUTHOR]

Humanities and the Arts, Arts, Design, Humaniora och konst, Konst, Natural Sciences, Computer and Information Sciences, Human Computer Interaction, Naturvetenskap, Data- och informationsvetenskap, Människa-datorinteraktion (interaktionsdesign), Design Education, Information Design, Prototyping, Novice designer, Bodily involvement, and Learning by Experiencing

In information design education, we strive to find methods that provide students with opportunities to explore different ways of learning and designing. We seek to support development of contextual competences that will be helpful in navigating an unknown future of design in society. A challenge in today's design education is to formulate and use methods that support design students in developing competencies in the space between basic form training and context-rich training. The aim of this study was to evaluate prototyping exercises in design education where the focus was in that in-between space. The study is based on 33 prototyping workshops done between 2008 and 2015 and involving 160 students and two design teachers. Four different approaches to prototyping exercises are described, examined and evaluated: "spatial prototyping," "multi-material prototyping," "physical prototyping," and a mix between the latter two, "physical multi-material prototyping." The results show that the prototyping exercises did support the learning of diverse competencies in the in-between space of basic form training and context training. However, the exercises were also counterproductive and met with different kinds of resistance. The results of the study invite to a dialogue on how different prototyping techniques can stimulate learning in relation to future design competences.

RELATIONSHIP marketing, MARKETING research, CUSTOMER relations, CUSTOMER loyalty, DATABASE marketing, and COMMERCIAL products

As relationship marketing research evolved, a number of key constructs emerged. Some scholars have argued that these constructs are not conceptually or empirically distinct. We investigate this phenomenon based on the premise that sustained research effort towards studying conceptually overlapping/redundant constructs, while treating them as independent, can hamper the development of the field. We use prototyping, a method adopted from psychology, to examine consumers’ views of these constructs, and then identify relationship contexts where constructs are distinct or redundant. [ABSTRACT FROM AUTHOR]

Natural Sciences, Biological Sciences, Biochemistry and Molecular Biology, Naturvetenskap, Biologiska vetenskaper, Biokemi och molekylärbiologi, nanoparticle, protein corona, mass spectrometry, surface proteomics, targeting, rapid prototyping, nanomedicine, Engineering and Technology, Nano Technology, Teknik och teknologier, and Nanoteknik

Engineered nanoparticles for biomedical applications requireincreasing effectiveness in targeting specific cells while preservingnon-target cell’s safety. We developed a surface proteomicsmethod for a rapid and systematic analysis of the interphasebetween the nanoparticle protein corona and the targeting cellsthat could implement the rapid prototyping of nanomedicines.Native nanoparticles entering in a protein-rich liquid mediaquickly form a macromolecular structure called protein corona.This protein structure defines the physical interaction betweennanoparticles and target cells. The surface proteins compose thefirst line of interaction between this macromolecular structureand the cell surface of a target cell. We demonstrated that SUSTU(SUrface proteomics, Safety, Targeting, Uptake) provides aqualitative and quantitative analysis from the protein coronasurface. With SUSTU, the spatial dynamics of the protein coronasurface can be studied. Data from SUSTU would ascertain thenanoparticle functionalized groups exposed at destiny that couldcircumvent preliminary in vitro experiments. Therefore thismethod could implement the analysis of nanoparticle targetingand uptake capability and could be integrated into a rapidprototyping strategy which is a major challenge in nanomaterialscience. Data are available via ProteomeXchange with identifierPXD004636.