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Article
Publication date: 3 July 2017

Morteza Mahmoudzadeh and Mahmood Alborzi

Iran Nanotechnology Initiative Council could significantly increase the production of scientific articles in the field by imposing ten-year incentive policies so that Iran…

Abstract

Purpose

Iran Nanotechnology Initiative Council could significantly increase the production of scientific articles in the field by imposing ten-year incentive policies so that Iran ranked 7 in this area in the year 2015. But this progress was insufficient to speed up the production and commercialization of nanotechnology products and Iran ranked 44 with a share of 0.03 per cent of nanotechnology production in the world. Therefore, Iran Nanotechnology Initiative Council as a governmental policymaker institution in this area has sought for the policy threefold increase of funding to speed up the production and commercialization of products in this field. But given that the result was not so clear, this research was formed in the form of modeling Iran Nanotechnology Innovation Network and testing various scenarios to increase its efficiency.

Design/methodology/approach

This paper uses simulation framework of innovation networks (SKIN) in an attempt to model the production innovation network in Iran in the field of nanotechnology that can measure the effect of incentive policies in changing the network structure and, consequently, increasing the level and pace of innovation in it. Given that the volume of articles produced in Iranian universities in the field of Nanotechnology had a high speed and volume in comparison with the volume of technical knowledge produced by companies, and because the SKIN framework did not consider the distinction between the two, in the first step, the framework is developed using the model of absorptive capacity of knowledge provided by Cohen and Levinthal (1990) and then the developed model was used to model the Innovation Network.

Findings

Finally, two policies of threefold increase of budget (Scenario 1) and increasing the support for joint projects (with maintaining the current budget level) (Scenario 2) were tested in this model. The social network analysis method was used to analyze the results of the two scenarios, where innovation network topology was compared (as an index to measure the network efficiency) in three states of current status of the network (the baseline scenario), implementing the first and second scenarios of extraction and with each other.

Originality/value

This paper models Iranian Nanotechnology Innovation Network for studying the evolution of the network as a result of executing different supportive scenarios.

Details

Journal of Science and Technology Policy Management, vol. 8 no. 2
Type: Research Article
ISSN: 2053-4620

Keywords

Article
Publication date: 1 June 1963

Under this heading are published regularly abstracts of all Reports and Memoranda of the Aeronautical Research Council, Technical Reports and Translations of the United…

Abstract

Under this heading are published regularly abstracts of all Reports and Memoranda of the Aeronautical Research Council, Technical Reports and Translations of the United States National Aeronautics and Space Administration and publications of other similar Research Bodies as issued.

Details

Aircraft Engineering and Aerospace Technology, vol. 35 no. 6
Type: Research Article
ISSN: 0002-2667

Article
Publication date: 27 October 2020

Lokesh Singh, Rekh Ram Janghel and Satya Prakash Sahu

The study aims to cope with the problems confronted in the skin lesion datasets with less training data toward the classification of melanoma. The vital, challenging issue…

Abstract

Purpose

The study aims to cope with the problems confronted in the skin lesion datasets with less training data toward the classification of melanoma. The vital, challenging issue is the insufficiency of training data that occurred while classifying the lesions as melanoma and non-melanoma.

Design/methodology/approach

In this work, a transfer learning (TL) framework Transfer Constituent Support Vector Machine (TrCSVM) is designed for melanoma classification based on feature-based domain adaptation (FBDA) leveraging the support vector machine (SVM) and Transfer AdaBoost (TrAdaBoost). The working of the framework is twofold: at first, SVM is utilized for domain adaptation for learning much transferrable representation between source and target domain. In the first phase, for homogeneous domain adaptation, it augments features by transforming the data from source and target (different but related) domains in a shared-subspace. In the second phase, for heterogeneous domain adaptation, it leverages knowledge by augmenting features from source to target (different and not related) domains to a shared-subspace. Second, TrAdaBoost is utilized to adjust the weights of wrongly classified data in the newly generated source and target datasets.

Findings

The experimental results empirically prove the superiority of TrCSVM than the state-of-the-art TL methods on less-sized datasets with an accuracy of 98.82%.

Originality/value

Experiments are conducted on six skin lesion datasets and performance is compared based on accuracy, precision, sensitivity, and specificity. The effectiveness of TrCSVM is evaluated on ten other datasets towards testing its generalizing behavior. Its performance is also compared with two existing TL frameworks (TrResampling, TrAdaBoost) for the classification of melanoma.

Details

Data Technologies and Applications, vol. 55 no. 1
Type: Research Article
ISSN: 2514-9288

Keywords

Article
Publication date: 1 December 2017

Salar Salah Muhy Al-Dın and Hourakhsh Ahmad Nia

The aim of this study is to extend the rationale and comprehensive understanding in respect of the notion of functionality and beauty in the smart skin buildings. Smart…

Abstract

The aim of this study is to extend the rationale and comprehensive understanding in respect of the notion of functionality and beauty in the smart skin buildings. Smart skin in buildings plays a key role in improving building functionality, and the future lies in the use of innovative smart skin strategies. The methodology focused on the objectivity and subjectivity of human perception to assess the aesthetic value of a building's smart skin. A theoretical analysis has been conducted based on the results of the investigation model and fortified by comparing the results with the findings obtained through the opinions of experts based in AHP methodology. The study demonstrates that there is a relation between both the aesthetic value and the functionality of the smart skin of a building. The findings revealed the difference in the aesthetic evaluation between the subjective functionality and the objective functionality of the building skin. The findings contribute useful evidence for the promotion of our understanding regarding the aesthetic value of the smart skin of a building, based on its functionality.

Details

Open House International, vol. 42 no. 4
Type: Research Article
ISSN: 0168-2601

Keywords

Article
Publication date: 7 March 2016

Srinivas Vasista, Alessandro De Gaspari, Sergio Ricci, Johannes Riemenschneider, Hans Peter Monner and Bram van de Kamp

The purpose of this paper is to provide an overview of the design and experimental work of compliant wing and wingtip morphing devices conducted within the EU FP7 project…

874

Abstract

Purpose

The purpose of this paper is to provide an overview of the design and experimental work of compliant wing and wingtip morphing devices conducted within the EU FP7 project NOVEMOR and to demonstrate that the optimization tools developed can be used to synthesize compliant morphing devices.

Design/methodology/approach

The compliant morphing devices were “designed-through-optimization”, with the optimization algorithms including Simplex optimization for composite compliant skin design, aerodynamic shape optimization able to take into account the structural behaviour of the morphing skin, continuum-based and load path representation topology optimization methods and multi-objective optimization coupled with genetic algorithm for compliant internal substructure design. Low-speed subsonic wind tunnel testing was performed as an effective means of demonstrating proof-of-concept.

Findings

It was found that the optimization tools could be successfully implemented in the manufacture and testing stage. Preliminary insight into the performance of the compliant structure has been made during the first wind tunnel tests.

Practical implications

The tools in this work further the development of morphing structures, which when implemented in aircraft have potential implications to environmentally friendlier aircrafts.

Originality/value

The key innovations in this paper include the development of a composite skin optimization tool for the design of highly 3D morphing wings and its ensuing manufacture process; the development of a continuum-based topology optimization tool for shape control design of compliant mechanisms considering the stiffness and displacement functions; the use of a superelastic material for the compliant mechanism; and wind tunnel validation of morphing wing devices based on compliant structure technology.

Details

Aircraft Engineering and Aerospace Technology: An International Journal, vol. 88 no. 2
Type: Research Article
ISSN: 1748-8842

Keywords

Article
Publication date: 1 September 1948

ALTHOUGH the Hawker Sea Fury is an individual design its structure has been developed step by step from its forebears. The Hurricane had a tubular fuselage and…

53

Abstract

ALTHOUGH the Hawker Sea Fury is an individual design its structure has been developed step by step from its forebears. The Hurricane had a tubular fuselage and metal‐covered wing; on the Typhoon the rear fuselage became a monocoque; while in the Tempest the semi‐elliptical wing appeared. The wing of the ‐Fury is generally similar in construction to that of the Tempest; but differs in the important point that it is continuous beneath the fuselage instead of being bolted to the sides. With the introduction of folding wings, when development was centred on the Naval Sea Fury in 1945, further modifications were made that resulted in the present wing design.

Details

Aircraft Engineering and Aerospace Technology, vol. 20 no. 9
Type: Research Article
ISSN: 0002-2667

Article
Publication date: 1 July 1947

THROUGH the courtesy of the administration of the Société Nationale de Constructions Aéronautiques du Sud‐Est a visit was recently paid to the factories where their new…

Abstract

THROUGH the courtesy of the administration of the Société Nationale de Constructions Aéronautiques du Sud‐Est a visit was recently paid to the factories where their new four‐engined, seventy‐ton, pressure‐cabin air liner is in series production. This aeroplane, of which a general impression can be gathered from figs. 1 and 2 is being built as a series of twenty‐four without awaiting the results of prototype trials. This bold step is being taken because it was felt essential as a means of over‐coming the gap in French production that occurred during the occupation. If the normal sequence had been followed, production aeroplanes might have been expected about 1952 instead of, as is now hoped, in 1948. To make up for the absence of prototype trials very careful testing of components and sections of the aeroplane is being carried out, while the design itself, although very modern, is not revolutionary but is based on well‐tried practice.

Details

Aircraft Engineering and Aerospace Technology, vol. 19 no. 7
Type: Research Article
ISSN: 0002-2667

Article
Publication date: 1 December 1957

In a supersonic aircraft, a fuselage, a plurality of aerofoils fixed relative to said fuselage including top and bottom surfaces, said aerofoils being longitudinally…

Abstract

In a supersonic aircraft, a fuselage, a plurality of aerofoils fixed relative to said fuselage including top and bottom surfaces, said aerofoils being longitudinally spaced from the centre of gravity of said aircraft, means for selectively creating supersonic aerodynamic wave patterns over a major portion of said aerofoils whereby differences in pressure result between the top and bottom surfaces of said aerofoils to control said aircraft in flight including a member extensible from the aircraft into the airstream and located adjacent each of said aerofoils, said member comprising a pair of toggle links having a common connexion breakable toward and movable into the free airstream, means for pivotally supporting the end of one of said links on said fuselage, means for biasing the free end of the other of said links in juxtaposition with said fuselage in all positions of said toggle, and means for selectively moving said common connexion into and out of said airstream.

Details

Aircraft Engineering and Aerospace Technology, vol. 29 no. 12
Type: Research Article
ISSN: 0002-2667

Content available
Book part
Publication date: 28 September 2020

Abstract

Details

Race, Ethnicity, Gender and Other Social Characteristics as Factors in Health and Health Care Disparities
Type: Book
ISBN: 978-1-83982-798-3

Article
Publication date: 17 August 2021

Ruiliang Feng, Jingchao Jiang, Zhichao Sun, Atul Thakur and Xiangzhi Wei

The purpose of this paper is to report the design of a lightweight tree-shaped support structure for fused deposition modeling (FDM) three-dimensional (3D) printed models…

Abstract

Purpose

The purpose of this paper is to report the design of a lightweight tree-shaped support structure for fused deposition modeling (FDM) three-dimensional (3D) printed models when the printing path is considered as a constraint.

Design/methodology/approach

A hybrid of genetic algorithm (GA) and particle swarm optimization (PSO) is proposed to address the topology optimization of the tree-shaped support structures, where GA optimizes the topologies of the trees and PSO optimizes the geometry of a fixed tree-topology. Creatively, this study transforms each tree into an approximate binary tree such that GA can be applied to evolve its topology efficiently. Unlike FEM-based methods, the growth of tree branches is based on a large set of FDM 3D printing experiments.

Findings

The hybrid of GA and PSO is effective in reducing the volume of the tree supports. It is shown that the results of the proposed method lead to up to 46.71% material savings in comparison with the state-of-the-art approaches.

Research limitations/implications

The proposed approach requires a large number of printing experiments to determine the function of the yield length of a branch in terms of a set of critical parameters. For brevity, one can print a small set of tree branches (e.g. 30) on a single platform and evaluate the function, which can be used all the time after that. The steps of GA for topology optimization and those of PSO for geometry optimization are presented in detail.

Originality/value

The proposed approach is useful for the designers and manufacturers to save materials and printing time in fabricating complex models using the FDM technique. It can be adapted to the design of support structures for other additive manufacturing techniques such as Stereolithography and selective laser melting.

Details

Rapid Prototyping Journal, vol. 27 no. 10
Type: Research Article
ISSN: 1355-2546

Keywords

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