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Book part
Publication date: 4 October 2019

Dries Faems and Anoop Madhok

Whereas incumbents often struggle to respond to disruptive innovations, start-up companies frequently face difficulties in establishing them within existing ecosystems…

Abstract

Whereas incumbents often struggle to respond to disruptive innovations, start-up companies frequently face difficulties in establishing them within existing ecosystems. Phased acquisitions, that is, trajectories where an incumbent initially takes an equity stake in a start-up and subsequently acquires it, have been suggested as viable strategy to address these challenges. Whereas prior research has focused on the macro-level governance of such phased acquisitions, the authors explore the micro-level governance, examining how the existence of and changes in particular coordination and control mechanisms can shape the phased acquisition and its performance implications. Based on a longitudinal process study of a phased acquisition in which one start-up and one incumbent jointly developed and commercialized a disruptive technology, the authors develop a process model that (1) illuminates the existence of micro-level governance shifts and their impact on the decision to transition from equity alliance to acquisition, (2) identifies specific triggers of micro-level governance shifts, and (3) emphasizes the existence of counterintuitive micro-level governance spillovers across alliance and acquisition.

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Managing Inter-organizational Collaborations: Process Views
Type: Book
ISBN: 978-1-78756-592-0

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Article
Publication date: 8 March 2018

Hui Wang, Zheng Zhang, Zhao Xiong, Tianye Liu, Kai Long, Xusong Quan and Xiaodong Yuan

It is a huge technical and engineering challenge to realize the precise assembly of thousands of large optics in high power solid-state laser system. Using the 400-mm…

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Abstract

Purpose

It is a huge technical and engineering challenge to realize the precise assembly of thousands of large optics in high power solid-state laser system. Using the 400-mm aperture-sized transport mirror as a case, this paper aims to present an intelligent numerical computation methodology for mounting performance analysis and modeling of large optics in a high-power laser system for inertial confinement fusion (ICF).

Design/methodology/approach

Fundamental principles of modeling and analysis of the transport mirror surface distortion are proposed, and a genetic algorithm-based computation framework is proposed to evaluate and optimize the assembly and mounting performance of large laser optics.

Findings

The stringent specifications of large ICF optics place very tight constraints upon the transport mirror’s assembly and mounts. The operational requirements on surface distortion [peak-to-valley and root mean square (RMS)] can be met as it is appropriately assembled by the close loop of assembly-inspection-optimization-fastening. In the end, the experimental study validates the reliability and effectiveness of the transport mirror mounting method.

Originality/value

In the assembly design and mounting performance evaluation of large laser optics, the whole study has the advantages of accurate evaluation and intelligent optimization on nano-level optical surface distortion, which provides a fundamental methodology for precise assembly and mounting of large ICF optics.

Details

Assembly Automation, vol. 38 no. 4
Type: Research Article
ISSN: 0144-5154

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Article
Publication date: 18 October 2018

Miguel Sangregorio, Ningfei Wang, Kan Xie, Zun Zhang and Xiaojun Wang

Traditional ion optics manufacturing processes are complex and costly. The purpose of this paper is to study the feasibility of using selective laser melting (SLM) to…

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137

Abstract

Purpose

Traditional ion optics manufacturing processes are complex and costly. The purpose of this paper is to study the feasibility of using selective laser melting (SLM) to produce additively manufactured ion optics.

Design/methodology/approach

An SLM machine was used to generate Ti6Al4V screen grids. The output was separated through wire cutting from the build platform and studied through a scanning electron microscope. To increase the geometrical accuracy of the original grid, samples consisting of nine-aperture arrays were fabricated with different parameter combinations, increasing the energy density. An empirical method to correlate the energy density applied in the fabrication process with the dimensional accuracy of the hole array positioning was developed through the analysis of multiple samples.

Findings

The SLM machine generated grids with optimal microstructure, the apertures fell within the specified tolerances and tolerances of slightly less than 10 µm can be guaranteed for the hole array positioning. The grids’ upper surfaces presented good-quality surface finish, and the lower surface quality was acceptable when the wire cutting process that separated the grid from the build platform performed slowly. Regardless of the build strategy, the stresses generated in the separation process caused the warping of the ion optic, so a flattening operation was necessary in all cases.

Originality/value

This research proved that SLM is a viable solution for ion optics fabrication, faster (less than 24 h) and less expensive (order of US$300) than traditional fabrication methods (with fabrication times from 24 to more than 400 h and costs from US$500 to US$5,000, depending on the material, size and shape).

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Rapid Prototyping Journal, vol. 25 no. 2
Type: Research Article
ISSN: 1355-2546

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Book part
Publication date: 4 January 2012

Dries Faems

Collaboration and acquisition have traditionally been observed as two alternative strategies when accessing external technologies. However, real option scholars have…

Abstract

Collaboration and acquisition have traditionally been observed as two alternative strategies when accessing external technologies. However, real option scholars have recently argued that firms can also engage in transitional technology sourcing trajectories where collaboration and acquisition are used as complementary strategies. While these real option scholars have identified factors that influence when partners are likely to shift from collaboration to acquisition, they remain silent on how such a transition can be effectively managed. Based on a multiple case study of four transitional technology sourcing trajectories between one new entrepreneurial and one established firm, this study therefore explores how the pre-acquisition collaboration stage and the post-acquisition integration are related to each other. Findings suggest that entrepreneurial companies may use the pre-acquisition collaboration stage as a period to evaluate the goodwill of the established partner. In addition, we point to the presence of pre-acquisition integration efforts and the extent of strategic convergence during the pre-acquisition collaboration stage as factors that substantially influence the success of the post-acquisition integration process in transitional governance trajectories.

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New Technology-Based Firms in the New Millennium
Type: Book
ISBN: 978-1-78052-118-3

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Article
Publication date: 1 February 1984

Michael Koenig

Fiber optics has the capability to dramatically increase telecommunications capability and lower costs. This article examines fiber optic technology, explains some of the…

Abstract

Fiber optics has the capability to dramatically increase telecommunications capability and lower costs. This article examines fiber optic technology, explains some of the key terminology, and speculates about the way fiber optics will change our world.

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Library Hi Tech, vol. 2 no. 1
Type: Research Article
ISSN: 0737-8831

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Expert briefing
Publication date: 23 February 2018

Germany’s digital policy.

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Article
Publication date: 3 May 2013

Michael Kijowski and Ludger Klinkenbusch

The purpose of this paper is to compare exact and Physical‐Optics‐approximated results of the electromagnetic field scattered by a perfectly conducting semi‐infinite…

Abstract

Purpose

The purpose of this paper is to compare exact and Physical‐Optics‐approximated results of the electromagnetic field scattered by a perfectly conducting semi‐infinite elliptic cone illuminated by a plane wave. The results are important for judging the reliability of Physical‐Optics based field estimations of electrically large environments which include tip‐like structures (e.g. airport scenarios).

Design/methodology/approach

The spherical‐multipole analysis is applied to determine the exact total field outside a perfectly conducting semi‐infinite elliptic cone. The underlying boundary‐value problem is solved by a separation of variables of the Helmholtz equation in sphero‐conal coordinates leading to a two‐parametric eigenvalue problem with two coupled Lamé differential equations. The exact scattered far field is determined from the exact surface current on the cone using a bilinear expansion of the dyadic Green's function. The Physical‐Optics (PO) field is evaluated similarly starting from a surface current which is directly found from the incident magnetic field.

Findings

The diffraction coefficients of the exact scattered field and the PO scattered field are compared for different parameters (polarization and angle of incidence) of the plane wave. Reasonably well corresponding results are obtained for those angles of incidence of the plane wave where the entire cone is illuminated, otherwise the error of the PO approximation is increasing not just in the shadow region.

Originality/value

If carefully applied, the Physical‐Optics method can be useful and sufficient to obtain fields scattered by cone‐like structures.

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COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, vol. 32 no. 3
Type: Research Article
ISSN: 0332-1649

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Article
Publication date: 1 May 1969

W. Allen

ONE of the reasons why the aircraft industry has made prodigious achievements during the last years is because it has always been quick to realise the potential of a new…

Abstract

ONE of the reasons why the aircraft industry has made prodigious achievements during the last years is because it has always been quick to realise the potential of a new design concept or production technique.

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Aircraft Engineering and Aerospace Technology, vol. 41 no. 5
Type: Research Article
ISSN: 0002-2667

Content available
Article
Publication date: 1 March 1998

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42

Abstract

Details

Sensor Review, vol. 18 no. 1
Type: Research Article
ISSN: 0260-2288

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Article
Publication date: 1 October 1988

L Armanini

The effects which are produced by pearlescent pigments are intimately connected to optics and the interaction of light with matter. Pearlescent pigments are optical…

Abstract

The effects which are produced by pearlescent pigments are intimately connected to optics and the interaction of light with matter. Pearlescent pigments are optical filters which reflect and transmit light which falls upon them. In order to understand pearlescent pigments, therefore it is first necessary to understand some of the basic laws of optics. I would like to review some of these laws to talk about light and its interaction with matter, how it can be separated into its components, the laws of reflection and refraction and how all of these laws apply to pearlescent pigments.

Details

Pigment & Resin Technology, vol. 17 no. 10
Type: Research Article
ISSN: 0369-9420

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