scholarly journals Compensation of the impact of low-cost manufacturing techniques in the design of E-plane multiport waveguide junctions

Radio Science ◽  
2016 ◽  
Vol 51 (6) ◽  
pp. 619-628
Author(s):  
A. A. San-Blas ◽  
J. M. Roca ◽  
S. Cogollos ◽  
J. V. Morro ◽  
V. E. Boria ◽  
...  
Keyword(s):  
Low Cost ◽  
Manufacturing Techniques ◽  
Low Cost Manufacturing ◽  
The Impact

Impact response of a low-cost randomly oriented fiber foam core sandwich panel

2018 ◽  
Vol 52 (25) ◽  
pp. 3429-3444 ◽  
Author(s):  
Ezequiel Buenrostro ◽  
Daniel Whisler
Keyword(s):  
Mechanical Properties ◽  
Sandwich Panel ◽  
Low Cost ◽  
Three Dimensional ◽  
Cost Effective ◽  
Foam Core ◽  
Fiber Reinforced ◽  
Manufacturing Method ◽  
Manufacturing Techniques ◽  
The Impact

Three-dimensional fiber-reinforced foam cores may have improved mechanical properties under specific strain rates and fiber volumes. But its performance as a core in a composite sandwich structure has not been fully investigated. This study explored different manufacturing techniques for the three-dimensional fiber-reinforced foam core using existing literature as a guideline to provide a proof of concept for a low-cost and easily repeatable method comprised of readily available materials. The mechanical properties of the fiber-reinforced foam were determined using a three-point bend test and compared to unreinforced polyurethane foam. The foam was then used in a sandwich panel and subjected to dynamic loading by means of a gas gun (103 s−1). High-strain impact tests validated previously published studies by showing, qualitatively and quantitatively, an 18–20% reduction in the maximum force experienced by the fiber-reinforced core and its ability to dissipate the impact force in the foam core sandwich panel. The results show potential for this cost-effective manufacturing method to produce an improved composite foam core sandwich panel for applications where high-velocity impacts are probable. This has the potential to reduce manufacturing and operating costs while improving performance.

Advanced packaging and low cost manufacturing techniques for GaAs microwave modules

2002 ◽  
Author(s):  
E.D. Niehenke ◽  
F.E. Sacks ◽  
M.D. Kline ◽  
A. Simon ◽  
W. Luce
Keyword(s):  
Low Cost ◽  
Advanced Packaging ◽  
Manufacturing Techniques ◽  
Low Cost Manufacturing

Low-cost manufacturing techniques for passive-integrated optical devices

1996 ◽  
Author(s):  
Richard W. Ridgway ◽  
Vincent D. McGinniss ◽  
Paul G. Andrus ◽  
James R. Busch
Keyword(s):  
Low Cost ◽  
Optical Devices ◽  
Integrated Optical ◽  
Integrated Optical Devices ◽  
Manufacturing Techniques ◽  
Low Cost Manufacturing

The Use of Multifunctional Composite Materials in Large Scale Naval Applications

2000 ◽  
Author(s):  
Roger M. Crane
Keyword(s):  
Large Scale ◽  
Low Cost ◽  
Structural Requirement ◽  
Weapon Systems ◽  
Radar Systems ◽  
History Of ◽  
Manufacturing Techniques ◽  
Structural Loading ◽  
Naval Structures ◽  
Low Cost Manufacturing

Abstract The U. S. Navy has a long-standing history of ship design using metals. With the improvements in weapon systems, it is becoming increasingly critical to design ship structures not only to satisfy the structural loading but also to exhibit additional multifunctional properties. This is becoming evident with structures such as the Advanced Enclosed Mast Sensor System, AEM/S, which was installed on the USS Radford. This structure was designed to house radar systems and allow the passage of certain radar frequencies through the structure while simultaneously not allowing the penetration of radar at other frequencies. In addition, the structure was designed to reduce the ship’s detectability. This paper will present a summary of the large-scale composite manufacturing that is being considered for Naval Structures. These structures are being manufactured using low-cost manufacturing techniques and are incorporating multifunctional characteristics in addition to meeting the structural requirement of the application. This paper will provide a historical discussion on the use of composite applications in the surface fleet.

scholarly journals An Integrated Design and Simulation Environment for Rapid Prototyping of Laminate Robotic Mechanisms

2018 ◽  
Author(s):  
Mohammad Sharifzadeh ◽  
Roozbeh Khodambashi ◽  
Daniel M. Aukes
Keyword(s):  
Design Space ◽  
Low Cost ◽  
Integrated Design ◽  
Design Tool ◽  
Simulation Environment ◽  
Laminate Design ◽  
Manufacturing Techniques ◽  
To Come ◽  
Low Cost Manufacturing ◽  
Model Based Analysis

Laminate mechanisms are a reliable concept in producing low-cost robots for educational and commercial purposes. These mechanisms are produced using low-cost manufacturing techniques which have improved significantly during recent years and are more accessible to novices and hobbyists. However, iterating through the design space to come up with the best design for a robot is still a time consuming and rather expensive task and therefore, there is still a need for model-based analysis before manufacturing. Until now, there has been no integrated design and analysis software for laminate robots. This paper addresses some of the issues surrounding laminate analysis by introducing a companion to an existing laminate design tool that automates the generation of dynamic equations and produces simulation results via rendered plots and videos. We have validated the accuracy of the software by comparing the position, velocity and acceleration of the simulated mechanisms with the measurements taken from physical laminate prototypes using a motion capture system.

Opportunities and Challenges in an Ever Generic World

2009 ◽  
Vol 6 (4) ◽  
pp. 303-313 ◽  
Author(s):  
Alan Sheppard
Keyword(s):  
Health Care ◽  
Economic Crisis ◽  
Low Cost ◽  
Health Care Systems ◽  
Pharmaceutical Market ◽  
Care Systems ◽  
Low Cost Manufacturing ◽  
The Impact

The global generics industry is about to embark on a decade of seismic change, and the impact to both patients and health-care systems cannot be overstated. This paper provides an overview of the global pharmaceutical market in the context of today's economic crisis, and a corresponding outline of key trends shaping the global generics market. It then focuses-in on an examination of the trend toward centralized contracting and how it will benefit those generics manufacturers with a broad portfolio and low-cost manufacturing base.

scholarly journals Concept and Design of a Multistable Plate Structure

2011 ◽  
Vol 133 (8) ◽  
Author(s):  
Matthew Santer ◽  
Sergio Pellegrino
Keyword(s):  
Injection Molding ◽  
Low Cost ◽  
Functional Model ◽  
Plate Structure ◽  
Manufacturing Techniques ◽  
Novel Concept ◽  
Key Steps ◽  
Low Cost Manufacturing

A concept is presented for a compliant plate structure that deforms elastically into a variety of cylindrical shapes and is able to maintain such shapes due to the presence of bistable components within the structure. The whole structure may be fabricated as a monolithic entity using low-cost manufacturing techniques such as injection molding. The key steps in the analysis of this novel concept are presented, and a functional model is designed and constructed to demonstrate the concept and validate the analysis.

Computer simulation study about the dependence of amorphous silicon photonic waveguides efficiency on the material quality

2020 ◽  
Vol 90 (3) ◽  
pp. 30502
Author(s):  
Alessandro Fantoni ◽  
João Costa ◽  
Paulo Lourenço ◽  
Manuela Vieira
Keyword(s):  
Amorphous Silicon ◽  
High Throughput Screening ◽  
Simulation Analysis ◽  
Low Cost ◽  
Deposition Process ◽  
Large Area ◽  
Sidewall Roughness ◽  
Sensing Applications ◽  
Fabrication Defects ◽  
The Impact

Amorphous silicon PECVD photonic integrated devices are promising candidates for low cost sensing applications. This manuscript reports a simulation analysis about the impact on the overall efficiency caused by the lithography imperfections in the deposition process. The tolerance to the fabrication defects of a photonic sensor based on surface plasmonic resonance is analysed. The simulations are performed with FDTD and BPM algorithms. The device is a plasmonic interferometer composed by an a-Si:H waveguide covered by a thin gold layer. The sensing analysis is performed by equally splitting the input light into two arms, allowing the sensor to be calibrated by its reference arm. Two different 1 × 2 power splitter configurations are presented: a directional coupler and a multimode interference splitter. The waveguide sidewall roughness is considered as the major negative effect caused by deposition imperfections. The simulation results show that plasmonic effects can be excited in the interferometric waveguide structure, allowing a sensing device with enough sensitivity to support the functioning of a bio sensor for high throughput screening. In addition, the good tolerance to the waveguide wall roughness, points out the PECVD deposition technique as reliable method for the overall sensor system to be produced in a low-cost system. The large area deposition of photonics structures, allowed by the PECVD method, can be explored to design a multiplexed system for analysis of multiple biomarkers to further increase the tolerance to fabrication defects.

Advancing dairy farming profitability through research

2001 ◽  
pp. 17-22
Author(s):  
J.R. Caradus ◽  
D.A. Clark
Keyword(s):  
Research And Development ◽  
Dairy Cow ◽  
Low Cost ◽  
Pasture Management ◽  
Nitrogen Fertiliser ◽  
Grass Endophyte ◽  
Forage Species ◽  
Development Outcomes ◽  
Dairy Cow Nutrition ◽  
The Impact

The New Zealand dairy industry recognises that to remain competitive it must continue to invest in research and development. Outcomes from research have ensured year-round provision of low-cost feed from pasture while improving productivity. Some of these advances, discussed in this paper, include the use of white clover in pasture, understanding the impacts of grass endophyte, improved dairy cow nutrition, the use of alternative forage species and nitrogen fertiliser to improve productivity, demonstration of the impact of days-in-milk on profitability, and the use of feed budgeting and appropriate pasture management. Keywords: dairy, profitability, research and development

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