Systematic design strategies for multi-physical RF systems using the example of MEMS oscillator

2015 ◽  
Author(s):  
Jacek Nowak ◽  
Ralf Sommer
Keyword(s):  
Systematic Design ◽  
Design Strategies ◽  
Rf Systems ◽  
Mems Oscillator

Topology Optimization for Design of Origami-Based Active Mechanisms

2014 ◽  
Author(s):  
Kazuko Fuchi ◽  
Philip R. Buskohl ◽  
James J. Joo ◽  
Gregory W. Reich ◽  
Richard A. Vaia
Keyword(s):  
Topology Optimization ◽  
Mechanism Design ◽  
Design Method ◽  
Truss Structures ◽  
Systematic Design ◽  
Design Strategies ◽  
Foldable Structures ◽  
And Performance ◽  
2D And 3D ◽  
Additional Constraints

Origami structures morph between 2D and 3D conformations along predetermined fold lines that efficiently program the form of the structure and show potential for many engineering applications. However, the enormity of the design space and the complex relationship between origami-based geometries and engineering metrics place a severe limitation on design strategies based on intuition. The presented work proposes a systematic design method using topology optimization to distribute foldline properties within a reference crease pattern, adding or removing folds through optimization, for a mechanism design. Following the work of Schenk and Guest, foldable structures are modeled as pin-joint truss structures with additional constraints on fold, or dihedral, angles. The performance of a designed origami mechanism is evaluated in 3D by applying prescribed forces and finding displacements at set locations. The integration of the concept of origami in mechanism design thus allows for the description of designs in 2D and performance in 3D. Numerical examples indicate that origami mechanisms with desired deformations can be obtained using the proposed method. A constraint on the number of foldlines is used to simplify a design.

scholarly journals Regional Resource Urbanism, Envisioning an Adaptive Transition for the Urbanising Periphery of Kathmandu

2021 ◽  
Vol 6 (1) ◽  
pp. 14
Author(s):  
Ashim Kumar Manna
Keyword(s):  
Agricultural Landscape ◽  
Agricultural Land ◽  
Design Strategy ◽  
Systematic Design ◽  
Design Strategies ◽  
Test Strategies ◽  
Landscape Urbanism ◽  
Production And Consumption ◽  
A Site ◽  
Traditional Communities

Despite a strong tradition of harmony between the landscape and its settlements, Kathmandu's periphery now stands altered due to the contemporary challenges of modernisation. It has become the contested territory where rapid urbanisation and infrastructure projects conflict with the valley's last remaining resources. i.e., fertile soil, floodplains, water sources, forests and agricultural land. The periphery is essential in preserving the remaining agricultural landscape, which is the mainstay of the numerous traditional communities of Kathmandu. Both the occupants and the productive landscape are threatened due to haphazard urbanisation and future mobility projects, resulting in speculative and uncontrolled sprawl. A detailed investigation was conducted on a site 15km south of Kathmandu to address the city's landscape challenges. The chosen investigation frame presented the suitable conditions to study and test strategies posed by the research objectives. The research utilises landscape urbanism and cartography to reveal the landscape's latent capacities, identify the spatial qualities, stakeholders and typologies involved in the production and consumption of resources. The study identifies existing resource flows and their ability to generate future scenarios. Systematic design strategies were applied in resource recovery projects by optimising enterprising capacity building within communities after the earthquake. The research recognises the merit in existing practices, community networks, the ongoing post-earthquake rebuilding efforts in offering an alternative design strategy in which landscape becomes the carrying structure for the sustainable reorganisation of Kathmandu's periphery.

scholarly journals Abductive Inferences in Strategic Design Decisions

2019 ◽  
Vol 1 (1) ◽  
pp. 1055-1064
Author(s):  
Ehud Kroll ◽  
Lauri Koskela
Keyword(s):  
Parameter Analysis ◽  
Strategic Decision ◽  
Strategic Decision Making ◽  
Systematic Design ◽  
Design Strategies ◽  
Specific Design ◽  
Design Decisions ◽  
Design Task ◽  
Strategic Design

AbstractThe overall strategy of designing is addressed. The design decisions that have a major impact on the direction in which the process evolves are termed “strategic”, and here we study them from the perspective of abduction. The aim is to clarify the role of abduction (in the sense of inference to the best explanation) in strategic decision making in design. Four cases are used for demonstration and discussion: functional decomposition in novel situations; the ordering of subfunctions in a function structure; the order of development of design tasks; and managing the design iterations. We focus on two specific design strategies: systematic design and parameter analysis, and show that strategic abductions often take place within the chosen strategy for the sake of efficiency of the process. Such abductions are often triggered by rules (like focusing first on the issue with greatest uncertainty in the total design task) that derive from Peirce's principle for economy of research. It is found that strategic abductions may have a decisive impact on the outcome of a design process. Two potential ways of improving design strategies and related strategic abductions are discussed.

Research on Sports Building Low-Carbon Design Strategies

2012 ◽  
Vol 209-211 ◽  
pp. 441-444
Author(s):  
Li Gang Shi ◽  
Yu Dong
Keyword(s):  
Building Design ◽  
Architectural Education ◽  
Energy Utilization ◽  
Systematic Design ◽  
Low Carbon ◽  
Design Strategies ◽  
Internal Factors ◽  
Solar Energy Utilization ◽  
Building System ◽  
Forward Integration

This article induced external condition and internal factors of the sports building system firstly. Then it discussed the necessity and possibility of integration sports building design with low-carbon idea. Furthermore it investigated different essential factors which constitutes the sports building system, proposed systematic design strategies such as function conformity adapting, highly effective structure shaping, rainwater utilization, solar energy utilization and so on. Finally this article brought forward integration design mentality unified the architectural education and practices.

scholarly journals A conceptual framework for resilience: fundamental definitions, strategies and metrics

Computing ◽  
2020 ◽  
Author(s):  
Jesper Andersson ◽  
Vincenzo Grassi ◽  
Raffaela Mirandola ◽  
Diego Perez-Palacin
Keyword(s):  
Life Cycle ◽  
System Dynamics ◽  
Conceptual Framework ◽  
Common Ground ◽  
Systematic Design ◽  
Clear Definition ◽  
Design Strategies ◽  
System Property ◽  
Technical Systems ◽  
Definition Of

AbstractThe resilience system property has become more and more relevant, mainly because of the increasing dependance on a rapidly growing number of software-intensive, complex, socio-technical systems, which are facing uncertainty about changes they are expected to experience during their life-cycle and ways to deal with them. Methodologies for the systematic design and validation of resilience for such systems are thus highly necessary, and require contributions from several different fields. This paper contributes to current resilience research by providing a conceptual framework intended to serve as a common ground for the development of such methodologies. Its main points are: the identification of the main categories of changes a system should face; a clear definition of the different facets of resilience one could want to achieve, expressed in terms of the system dynamics; a mapping of each of these facets to design strategies that are better suited to achieve it; and the corresponding identification of possible metrics that can be used to assess its achievement.

Towards a Design of Active Oxygen Evolution Catalysts: Insights from Automated Density Functional Theory Calculations and Machine Learning

2019 ◽  
Author(s):  
Seoin Back ◽  
Kevin Tran ◽  
Zachary Ulissi
Keyword(s):  
Machine Learning ◽  
Oxygen Evolution ◽  
Active Sites ◽  
Density Functional ◽  
Chemical Space ◽  
Density Functional Theory Calculations ◽  
Catalyst Design ◽  
Transition Metal Catalysts ◽  
Oxide Materials ◽  
Design Strategies

<div> <div> <div> <div><p>Developing active and stable oxygen evolution catalysts is a key to enabling various future energy technologies and the state-of-the-art catalyst is Ir-containing oxide materials. Understanding oxygen chemistry on oxide materials is significantly more complicated than studying transition metal catalysts for two reasons: the most stable surface coverage under reaction conditions is extremely important but difficult to understand without many detailed calculations, and there are many possible active sites and configurations on O* or OH* covered surfaces. We have developed an automated and high-throughput approach to solve this problem and predict OER overpotentials for arbitrary oxide surfaces. We demonstrate this for a number of previously-unstudied IrO2 and IrO3 polymorphs and their facets. We discovered that low index surfaces of IrO2 other than rutile (110) are more active than the most stable rutile (110), and we identified promising active sites of IrO2 and IrO3 that outperform rutile (110) by 0.2 V in theoretical overpotential. Based on findings from DFT calculations, we pro- vide catalyst design strategies to improve catalytic activity of Ir based catalysts and demonstrate a machine learning model capable of predicting surface coverages and site activity. This work highlights the importance of investigating unexplored chemical space to design promising catalysts.<br></p></div></div></div></div><div><div><div> </div> </div> </div>

Control of a MEMS oscillator with Chaotic Behavior

2018 ◽  
Author(s):  
Angelo Marcelo Tusset ◽  
Rodrigo Tumolin Rocha ◽  
Frederic Conrad Janzen ◽  
José Manoel Balthazar
Keyword(s):  
Chaotic Behavior ◽  
Mems Oscillator
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