484,303 research outputs found
The Effectual Design Method for Internationalizing Architectural and Engineering Services: Insights from Swiss Design Entrepreneurs
This research explores the use of effectual and causal design logic in architectural and engineering design internationalization. Specifically, it aims to understand how individual design entrepreneurs act across three international opportunity design problem spaces: (a) formation, (b) evaluation, and (c) exploitation. This qualitative multiple-case study employed phenomenographic, semi-structured interviews with 17 Swiss architectural and engineering design entrepreneurs.
The findings indicate that international opportunity formation is created via the dominant effectual design logic principle; international opportunity evaluation mainly applies causal design logic; and international opportunity exploitation primarily uses actions combining effectual and causal design logic principles. This research contributes to the architectural and engineering design internationalization literature, which focuses only on causal design logic and provides a practical integrative model for successful international architectural and engineering design services
Optimal Placement of Valves in a Water Distribution Network with CLP(FD)
This paper presents a new application of logic programming to a real-life
problem in hydraulic engineering. The work is developed as a collaboration of
computer scientists and hydraulic engineers, and applies Constraint Logic
Programming to solve a hard combinatorial problem. This application deals with
one aspect of the design of a water distribution network, i.e., the valve
isolation system design.
We take the formulation of the problem by Giustolisi and Savic (2008) and
show how, thanks to constraint propagation, we can get better solutions than
the best solution known in the literature for the Apulian distribution network.
We believe that the area of the so-called hydroinformatics can benefit from
the techniques developed in Constraint Logic Programming and possibly from
other areas of logic programming, such as Answer Set Programming.Comment: Best paper award at the 27th International Conference on Logic
Programming - ICLP 2011; Theory and Practice of Logic Programming, (ICLP'11)
Special Issue, volume 11, issue 4-5, 201
A synthesis of logic and biology in the design of dependable systems
The technologies of model-based design and dependability analysis in the design of dependable systems, including software intensive systems, have advanced in recent years. Much of this development can be attributed to the application of advances in formal logic and its application to fault forecasting and verification of systems. In parallel, work on bio-inspired technologies has shown potential for the evolutionary design of engineering systems via automated exploration of potentially large design spaces. We have not yet seen the emergence of a design paradigm that combines effectively and throughout the design lifecycle these two techniques which are schematically founded on the two pillars of formal logic and biology. Such a design paradigm would apply these techniques synergistically and systematically from the early stages of design to enable optimal refinement of new designs which can be driven effectively by dependability requirements. The paper sketches such a model-centric paradigm for the design of dependable systems that brings these technologies together to realise their combined potential benefits
Integrating a nanologic knowledge module Into an undergraduate logic design course
This work discusses a knowledge module in an undergraduate logic design course for electrical engineering (EE) and computer science (CS) students, that introduces them to nanocomputing concepts. This knowledge module has a twofold objective. First, the module interests students in the fundamental logical behavior and functionality of the nanodevices of the future, which will motivate them to enroll in other elective courses related to nanotechnology, offered in most EE and CS departments. Second, this module can be used to let students analyze, synthesize, and apply their existing knowledge of the Karnaugh-map-based Boolean logic reduction scheme into a revolutionary design context with majority logic. Where many efforts focus on developing new courses on nanofabrication and even nanocomputing, this work is designed to augment the existing standard EE and CS courses by inserting knowledge modules on nanologic structures so as to stimulate student interest without creating a significant diversion from the course framework
Toward Reverse Engineering of VBA Based Excel Spreadsheet Applications
Modern spreadsheet systems can be used to implement complex spreadsheet
applications including data sheets, customized user forms and executable
procedures written in a scripting language. These applications are often
developed by practitioners that do not follow any software engineering practice
and do not produce any design documentation. Thus, spreadsheet applications may
be very difficult to be maintained or restructured. In this position paper we
present in a nutshell two reverse engineering techniques and a tool that we are
currently realizing for the abstraction of conceptual data models and business
logic models.Comment: In Proceedings of the 2nd Workshop on Software Engineering Methods in
Spreadsheets (http://spreadsheetlab.org/sems15/
Non-Volatile Magnonic Logic Circuits Engineering
We propose a concept of magnetic logic circuits engineering, which takes an
advantage of magnetization as a computational state variable and exploits spin
waves for information transmission. The circuits consist of magneto-electric
cells connected via spin wave buses. We present the result of numerical
modeling showing the magneto-electric cell switching as a function of the
amplitude as well as the phase of the spin wave. The phase-dependent switching
makes it possible to engineer logic gates by exploiting spin wave buses as
passive logic elements providing a certain phase-shift to the propagating spin
waves. We present a library of logic gates consisting of magneto-electric cells
and spin wave buses providing 0 or p phase shifts. The utilization of phases in
addition to amplitudes is a powerful tool which let us construct logic circuits
with a fewer number of elements than required for CMOS technology. As an
example, we present the design of the magnonic Full Adder Circuit comprising
only 5 magneto-electric cells. The proposed concept may provide a route to more
functional wave-based logic circuitry with capabilities far beyond the limits
of the traditional transistor-based approach
Engineering orthogonal dual transcription factors for multi-input synthetic promoters
Synthetic biology has seen an explosive growth in the capability of engineering artificial gene circuits from transcription factors (TFs), particularly in bacteria. However, most artificial networks still employ the same core set of TFs (for example LacI, TetR and cI). The TFs mostly function via repression and it is difficult to integrate multiple inputs in promoter logic. Here we present to our knowledge the first set of dual activator-repressor switches for orthogonal logic gates, based on bacteriophage λ cI variants and multi-input promoter architectures. Our toolkit contains 12 TFs, flexibly operating as activators, repressors, dual activator–repressors or dual repressor–repressors, on up to 270 synthetic promoters. To engineer non cross-reacting cI variants, we design a new M13 phagemid-based system for the directed evolution of biomolecules. Because cI is used in so many synthetic biology projects, the new set of variants will easily slot into the existing projects of other groups, greatly expanding current engineering capacities
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