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Article
Publication date: 19 June 2017

Lars Lindner, Oleg Sergiyenko, Moises Rivas-López, Daniel Hernández-Balbuena, Wendy Flores-Fuentes, Julio C. Rodríguez-Quiñonez, Fabian N. Murrieta-Rico, Mykhailo Ivanov, Vera Tyrsa and Luis C. Básaca-Preciado

The purpose of this paper is to present a novel application for a newly developed Technical Vision System (TVS), which uses a laser scanner and dynamic triangulation, to…

Abstract

Purpose

The purpose of this paper is to present a novel application for a newly developed Technical Vision System (TVS), which uses a laser scanner and dynamic triangulation, to determine the vitality of agriculture vegetation. This vision system, installed on an unmanned aerial vehicle, shall measure the reflected laser energy and thereby determine the normalized differenced vegetation index.

Design/methodology/approach

The newly developed TVS shall be installed on the front part of the unmanned aerial vehicle, to perform line-by-line scan in the vision system field-of-view. The TVS uses high-quality DC motors, instead of previously researched low-quality DC motors, to eliminate the existence of two mutually exclusive conditions, for exact positioning of a DC motor shaft. The use of high-quality DC motors reduces the positioning error after control.

Findings

Present paper emphasizes the exact laser beam positioning in the field-of-view of a TVS. By use of high-quality instead of low-quality DC motors, a significant reduced positioning time was achieved, maintaining the relative angular position error less than 1 per cent. Best results were achieved, by realizing a quasi-continuous control, using a high pulse-width modulated duty cycle resolution and a high execution frequency of the positioning algorithm.

Originality/value

The originality of present paper is represented by the novel application of the newly developed TVS in the field of agriculture. The vitality of vegetation shall be determined by measuring the reflected laser energy of a scanned agriculture zone. The paper’s main focus is on the exact laser beam positioning within the TVS field-of-view, using high-quality DC motors in closed-loop position control configuration.

Details

Industrial Robot: An International Journal, vol. 44 no. 4
Type: Research Article
ISSN: 0143-991X

Keywords

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Article
Publication date: 20 June 2016

Lars Lindner, Oleg Sergiyenko, Julio C. Rodríguez-Quiñonez, Moises Rivas-Lopez, Daniel Hernandez-Balbuena, Wendy Flores-Fuentes, Fabian Natanael Murrieta-Rico and Vera Tyrsa

The purpose of this paper is the presentation and research of a novel robot vision system, which uses laser dynamic triangulation, to determine three-dimensional (3D…

Abstract

Purpose

The purpose of this paper is the presentation and research of a novel robot vision system, which uses laser dynamic triangulation, to determine three-dimensional (3D) coordinates of an observed object. The previously used physical operation principle of discontinuous scanning method is substituted by continuous method. Thereby applications become possible that were previously limited by this discretization.

Design/methodology/approach

The previously used prototype No. 2, which uses stepping motors to realize a discontinuous laser scan, was substituted by the new developed prototype No. 3, which contains servomotors, to achieve a continuous laser scan. The new prototype possesses only half the width and turns out to be significantly smaller and therefore lighter than the old one. Furthermore, no transmissions are used, which reduce the systematic error of laser positioning and increase the system reliability.

Findings

By using a continuous laser scan method instead of discontinuous laser scan method, dead zones in the laser scanner field can be eliminated. Thereby, also by changing the physical operation principle, the implementation of applications is allowed, which previously was limited by the fixed step size or by the object distance under observation. By using servomotors instead of stepping motors, also a significant reduced positioning time can be accomplished maintaining the relative positioning error less than 1 per cent.

Originality/value

The originality is based on the substitution of the physical operation principle of discontinuous by continuous laser scan. The previously used stepping motors discretized the laser scanner field and thereby produced dead zones, where 3D coordinates cannot be detected. These stepping motors were substituted by servomotors to revoke these disadvantages and provide a continuous laser scan, where dead zones in the field of view get eliminated and the step response of the laser scanner accelerated.

Details

Industrial Robot: An International Journal, vol. 43 no. 4
Type: Research Article
ISSN: 0143-991X

Keywords

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Article
Publication date: 1 October 2003

G. Kelleher, A. El‐Rhalibi and F. Arshad

A logistics‐based project is described which addresses the need for better intermodal transport, whilst balancing economic and environmental gains through the use of…

Abstract

A logistics‐based project is described which addresses the need for better intermodal transport, whilst balancing economic and environmental gains through the use of Internet technologies. Pipeline intermodal system to support control, expedition and scheduling (PISCES) provides an integrating platform for using these technologies in processing and sharing commercially sensitive data within transport chains (i.e. road, rail and barge). The paper demonstrates how information from an Internet‐based system can be used to drive a scheduling tool to provide appropriate routes for the transport of goods, using a multimodal transport model.

Details

Logistics Information Management, vol. 16 no. 5
Type: Research Article
ISSN: 0957-6053

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Article
Publication date: 1 June 1998

Gabriel Sirat and Freddy Paz

Reports on developments at Optimet in the R&D Group, where a novel distance probe performs high accuracy distance measurement over broad length scales. Considers applications.

Abstract

Reports on developments at Optimet in the R&D Group, where a novel distance probe performs high accuracy distance measurement over broad length scales. Considers applications.

Details

Sensor Review, vol. 18 no. 2
Type: Research Article
ISSN: 0260-2288

Keywords

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Article
Publication date: 7 May 2019

Rupeng Yuan, Fuhai Zhang, Jiadi Qu, Guozhi Li and Yili Fu

The purpose of this paper is to propose an enhanced pose tracking method using progressive scan matching, focusing on accuracy, time efficiency and robustness.

Abstract

Purpose

The purpose of this paper is to propose an enhanced pose tracking method using progressive scan matching, focusing on accuracy, time efficiency and robustness.

Design/methodology/approach

The general purpose of localization algorithms is to dynamically track a robot instead of globally locating one. In this paper, progressive scan matching is used to promote the performance of pose tracking. Rotational and translational samples are separately generated to accelerate the calculation and to increase the accuracy. Progressive iteration of sample generation can ensure localization to achieve a specific precision. The direction of localization uncertainty is taken into consideration to increase robustness. Nonlinear optimization is adopted to achieve a more precise result.

Findings

The proposed method was implemented on a self-made mobile robot. Two experiments were conducted to test the accuracy and time efficiency of the method. The comparison with the basic Monte Carlo localization shows the advantages of the method. Another two experiments were conducted to test the robustness of the method. The result shows that the method can relocate a robot from an inaccurate place if the offset is moderate.

Originality/value

An enhanced pose tracking method is proposed to promote the performance by separately processing rotational and translational samples, progressively iterating the sample generation, taking the direction of localization uncertainty into consideration and adopting nonlinear optimization. The proposed method enables a robot to accurately and quickly locate itself in the environment with robustness.

Details

Industrial Robot: the international journal of robotics research and application, vol. 46 no. 2
Type: Research Article
ISSN: 0143-991X

Keywords

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Book part
Publication date: 25 April 2017

Gang Zhu

To explore how student teachers (re)construct their professional identities, this chapter contextualizes two student teachers’ practicum experiences in China. The…

Abstract

To explore how student teachers (re)construct their professional identities, this chapter contextualizes two student teachers’ practicum experiences in China. The overarching question is how the student teachers (re)construct their professional identities in the practicums, especially where their teacher knowledge and subject matter knowledge meet. By analyzing a flexible matrix of paired stories, the research highlights the collective influences of the multiple instructional contexts: nation-wide Free Teacher Education program policy, recent national curriculum reform in China, and the characteristics of the placement schools. The chapter finds that the student teachers’ professional identities are dynamic and evolving on the professional knowledge landscape. The (re)construction of professional identities involves developing practical knowledge and metaphors by negotiating the tensions the student teachers encountered in the practicums. Meanwhile, the student teachers experienced reflective turns (Schön, 1991) in the practicums, which caused the tension between teacher knowledge and subject matter knowledge and contributed to the formation of their professional identities.

Details

Crossroads of the Classroom
Type: Book
ISBN: 978-1-78635-796-0

Keywords

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Book part
Publication date: 19 May 2009

Francis J. Yammarino and Fred Dansereau

This reply to Ashkanasy's commentary (2009) on our chapter “A New Kind of OB” (Yammarino & Dansereau, 2009) offers some additional thoughts on theory building and theory…

Abstract

This reply to Ashkanasy's commentary (2009) on our chapter “A New Kind of OB” (Yammarino & Dansereau, 2009) offers some additional thoughts on theory building and theory testing in terms of our four simple theories about individual behavior, interpersonal relationships, group dynamics, and collectivized processes in organizations. We reiterate the key point that these simple notions can explain a variety of complex phenomena and behavior in organizations.

Details

Multi-Level Issues in Organizational Behavior and Leadership
Type: Book
ISBN: 978-1-84855-503-7

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Article
Publication date: 28 November 2019

Zhigang Li, Shining He, Jing Ning, Zhen Liu, Jingwei Zhang and Xin Du

Starting from corporate entrepreneurship, spin-off entrepreneurship and business model theory, this paper aims to examine the key influential factors and inherent…

Abstract

Purpose

Starting from corporate entrepreneurship, spin-off entrepreneurship and business model theory, this paper aims to examine the key influential factors and inherent mechanism in the process of business model transfer from parent enterprise to spin-off start-ups.

Design/methodology/approach

Grounded theory method is fit for constructing theoretical models, which can discover and interpret phenomenon and activities. According to the guidance of theoretical sampling and other core principles in grounded theory, this study extracts two parent enterprises named Haier and Phnix and lots of spin-offs derived from them.

Findings

This paper presents the theoretical framework that business models transfer from parents to spin-offs and probes into the embedding logic and connection relationship between factors and categories in this process, such as preconditions, incubation veins, business model elements, stripping mechanism and independent operations.

Research limitations/implications

Although this study is focused on the manufacturing industry, the main characteristics, comparative advantages, governance rules summarized from transfer activities of business model in spin-off entrepreneurship can also bring inspirations to both parent enterprises and spin-off start-ups.

Originality/value

Excavates process and mechanism of business model transfer from internal to external, extends the theoretical perspectives about existing related theories such as corporate entrepreneurship, spin-off entrepreneurship and business model theory and reveals new approaches and methods on business model design, which is different from the past way.

Details

Nankai Business Review International, vol. 11 no. 1
Type: Research Article
ISSN: 2040-8749

Keywords

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Article
Publication date: 9 October 2009

J. Kozicki and F.V. Donzé

YADE‐OPEN DEM is an open‐source software based on the discrete element method, (DEM) which uses object oriented programming techniques. The purpose of this paper is to…

Abstract

Purpose

YADE‐OPEN DEM is an open‐source software based on the discrete element method, (DEM) which uses object oriented programming techniques. The purpose of this paper is to describe the software architecture.

Design/methodology/approach

The DEM chosen uses position, orientation, velocity and angular velocity as independent variables of simulated particles which are subject to explicit leapfrog time‐integration scheme (Lagrangian method). The three‐dimensional dynamics equations based on the classical Newtonian approach for the second law of motion are used. The track of forces and moments acting on each particle is kept at every time step. Contact forces depend on the particle geometry overlap and material properties. The normal, tangential and moment components of interaction force are included.

Findings

An effort is undertaken to extract the underlying object oriented abstractions in the DEM. These abstractions are implemented in C++, conform to object oriented design principles and use design patterns. Based on that, a software framework is developed in which the abstractions provide the interface where the modelling methods can be plugged‐in.

Originality/value

The resulting YADE‐OPEN DEM framework is designed in a generic way which provides great flexibility when adding new scientific simulation code. Some of the advantages are that numerous simulation methods can be coupled within the same framework while plug‐ins can import data from other software. In addition, this promotes code improvement through open‐source development and allows feedback from the community. However implementing such models requires that one adheres to the framework design and the YADE framework is a new emerging software. To download the software see http : //yade.wikia.com webpage.

Details

Engineering Computations, vol. 26 no. 7
Type: Research Article
ISSN: 0264-4401

Keywords

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Article
Publication date: 11 June 2018

Sumeet Om Sharma and Angela Martin

This paper aims to enhance the understanding of the essence of product innovation capability (PIC) as a dynamic capability by systematically assessing its…

Abstract

Purpose

This paper aims to enhance the understanding of the essence of product innovation capability (PIC) as a dynamic capability by systematically assessing its conceptualization and construct validity. The paper answers the call by numerous researchers to undertake research efforts to better understand and operationalize dynamic capability constructs.

Design/methodology/approach

A priori and scholarly contentions based on complementarities between the tenets of three prominent frameworks (Dynamic Capability View, Process Management and Organizational Ambidexterity) were utilized for conducting a theoretical triangulation, as presented in the paper. Established approaches to explication and measurement of multi-dimensional latent constructs were used for guiding this paper.

Findings

This paper enhances the conceptualization of dynamic capabilities and identifies a lacuna in frequently adopted PIC operationalization approaches that is pertinent to other dynamic capabilities. It presents substantive and specific prescriptions for enabling the development of superior capability (both dynamic and operational) measurement models in empirical research.

Research limitations/implications

The diverse implications for research and practice are discussed in the paper alongside suggestions for future research.

Originality/value

This paper guides future theoretical and empirical research by reviewing the conception and validity of PIC. It presents a comprehensive conception of dynamic capabilities by extending the dynamic capability definition to address the identified problems. The arguments presented have wide-ranging applications and broad generalizability across multiple research fields.

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