Conservation Biology. Dec 2019, Vol. 33 Issue 6, p1448, 3 p.
***** No abstract is available for this article. Article Note: Article impact statement: Web-application development frameworks enable the creation of decision-support tool prototypes for actionable conservation science. CAPTION(S): Table 1. List of web-application development frameworks that might be useful for conservation scientists. Byline: Denis Valle, Kok Ben Toh, Justin Millar
IEEE Transactions on Power Electronics. Sep2019, Vol. 34 Issue 9, p8715-8723. 9p.
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]
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]
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]
Medlej, Maroun, Stuban, Steven M. F., and Dever, Jason R.
Defense Acquisition Research Journal: A Publication of the Defense Acquisition University. Oct2017, Vol. 24 Issue 4, p626-655. 30p.
SYSTEMS engineering, RAPID prototyping, DEFENSE industries, MANUFACTURING processes, and LIKELIHOOD ratio tests
In 2007, John Young, then-Under Secretary of Defense for Acquisition, Technology and Logistics, mandated the use of "competitive prototyping" strategies in defense acquisition. Further, Department of Defense Instruction 5000.02 includes considerations for prototyping in the acquisition strategy. A 2017 memorandum circulated by Young lists five prototyping benefits, which are expected to "reduce technical risk, validate designs, validate cost estimates, evaluate manufacturing processes, and refine requirements." However, a process to assess whether, and to what extent, a prototype will be or has been successful in achieving these benefits is not currently in use by the Department of Defense. Because cost increases and schedule extension downsides are inherent in prototyping, such an assessment is critical. This research proposes an approach for assessing the likelihood of achieving expected prototyping benefits based on identifying the factors yielding these benefits as well as their relative weights. [ABSTRACT FROM AUTHOR]
Tenders are invited for Large format duel extruder rapid prototyping system. Details are as per rfp. Product Category: Miscellaneous goods EMD Amount (INR): 1,00,000 Tender Type: Open tender Bid Validity(Days): [...]
Tenders are invited for metal rapid prototyping of aero engine model with accessories Product category: miscellaneous goods Emd amount (inr): 60,980 Tender type: open tender Bid validity(days): 180 Period of [...]
Information Services & Use. 2016, Vol. 35 Issue 1/2, p71-75. 5p. 2 Color Photographs, 1 Black and White Photograph.
RAPID prototyping, INFORMATION technology, TECHNOLOGICAL innovations, and BUSINESS partnerships
To build a platform for (high, sustainable) use, we need to know what will thrill users. Finding the right concoction of technology, functionality and design to delight users takes a thousand decisions, pivots and changes. The JSTOR Labs team has been using Flash Builds -- high-intensity, short-burst, user-driven development efforts -- in order to prototype new ideas and get to a user saying "Wow" in as little as a week. In this paper, a distillation of a presentation I gave at NFAIS 2015, I will describe how we have done this, highlighting the partnerships, skills, tools and content that help us innovate. [ABSTRACT FROM AUTHOR]
Contract notice: Sensolaboratory - rapid prototyping workplace The Technical University of Ilmenau plans to create a rapid prototyping workstation. An essential component is a selective laser sintering 3D printer. With [...]
Contract awarded for Modernization of the laboratory of rapid prototyping 3d methods no. A-37 of the faculty of environmental and power engineering of the silesian university of technology at ul. [...]
Tenders are invited for Rapid prototyping pcb machine Tender Type: Global tenders Form Of Contract: Supply Tender Category: Goods No. of Covers: 2 General Technical Evaluation Allowed: No ItemWise Technical [...]
Tenders are invited for Supply Installation Of Machinery/ Equipments - Fdm Technology (Rapid Prototyping) 3D Printer Major organization : CENTRE FOR SKILLING AND TECHNICAL SUPPORT Address : Plot No J-3/2, [...]
Hardgrave, Bill C., Wilson, Rick L., and Eastman, Ken
Journal of Management Information Systems. Fall1999, Vol. 16 Issue 2, p113-136. 24p. 1 Diagram, 9 Charts, 4 Graphs.
INFORMATION resources management, RAPID prototyping, INDUSTRIAL surveys, COMPUTER software developers, SYSTEMS design, and ORGANIZATION
Many proposed contingencies regarding the conditions when the use of prototyping will lead to successful system development appear in the literature. Using an industry survey, this exploratory study empirically investigates the effect of certain contingencies on system success. Overall, results indicate that five variables, when combined with prototyping, affect system success (as indicated by user satisfaction): innovativeness of the project, impact of the system on the organization, user participation, number of users, and developer experience with prototyping. These results provide some insight into the proper uses of prototyping to improve system success. The results also indicate that several of the current contingencies, if followed, do not ensure high levels of system success. [ABSTRACT FROM AUTHOR]
Communications of the ACM. Jun84, Vol. 27 Issue 6, p556-563. 8p. 2 Diagrams, 6 Charts.
RAPID prototyping, PROTOTYPES, JOB analysis, INFORMATION resources management, SYSTEMS design, ORGANIZATIONAL change, and CORPORATE culture
This article assesses the effectiveness of the prototyping approach to information systems development. In this investigation of the effectiveness of the prototyping approach, user and designer attitudes are explored through field interviews and a laboratory experiment. The research findings concerning the impact of the prototyping approach on designers and users of information systems provide some insight into the effectiveness of the prototyping approach. A prototyping effort should be undertaken by designers and users who are well informed about the prototyping approach. Prototyping philosophy and plans should be understood by both designers and users. Prototyping is a new approach to information systems development, and like any organizational innovation, it needs a supportive organizational climate. Prerequisites to successful prototyping include technological tools that facilitate fast response to user requests and motivated and knowledgeable users and designers. In summary, the prototyping approach offers an opportunity to achieve favorable user attitudes toward the design process and the information system.