Search results

1 – 10 of 265
Article
Publication date: 8 April 2024

Matthew Peebles, Shen Hin Lim, Mike Duke, Benjamin Mcguinness and Chi Kit Au

Time of flight (ToF) imaging is a promising emerging technology for the purposes of crop identification. This paper aim to presents localization system for identifying and…

11

Abstract

Purpose

Time of flight (ToF) imaging is a promising emerging technology for the purposes of crop identification. This paper aim to presents localization system for identifying and localizing asparagus in the field based on point clouds from ToF imaging. Since the semantics are not included in the point cloud, it contains the geometric information of other objects such as stones and weeds other than asparagus spears. An approach is required for extracting the spear information so that a robotic system can be used for harvesting.

Design/methodology/approach

A real-time convolutional neural network (CNN)-based method is used for filtering the point cloud generated by a ToF camera, allowing subsequent processing methods to operate over smaller and more information-dense data sets, resulting in reduced processing time. The segmented point cloud can then be split into clusters of points representing each individual spear. Geometric filters are developed to eliminate the non-asparagus points in each cluster so that each spear can be modelled and localized. The spear information can then be used for harvesting decisions.

Findings

The localization system is integrated into a robotic harvesting prototype system. Several field trials have been conducted with satisfactory performance. The identification of a spear from the point cloud is the key to successful localization. Segmentation and clustering points into individual spears are two major failures for future improvements.

Originality/value

Most crop localizations in agricultural robotic applications using ToF imaging technology are implemented in a very controlled environment, such as a greenhouse. The target crop and the robotic system are stationary during the localization process. The novel proposed method for asparagus localization has been tested in outdoor farms and integrated with a robotic harvesting platform. Asparagus detection and localization are achieved in real time on a continuously moving robotic platform in a cluttered and unstructured environment.

Details

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

Keywords

Article
Publication date: 15 May 2020

ChiKit Au, Joshua Barnett, Shen Hin Lim and Mike Duke

This paper aims to investigate if a Cartesian robot system for kiwifruit harvesting works more effectively and efficiently than an articulated robot system. The robot is a key…

291

Abstract

Purpose

This paper aims to investigate if a Cartesian robot system for kiwifruit harvesting works more effectively and efficiently than an articulated robot system. The robot is a key component in agricultural automation. For instance, multiple robot arm system has been developed for kiwifruit harvesting recently because of the significant labor shortage issue. The industrial robots for factory automation usually have articulated configuration which is suitable for the tasks in the manufacturing and production environment. However, this articulated configuration may not fit for agricultural application due to the large outdoor environment.

Design/methodology/approach

The kiwifruit harvesting tasks are completed step by step so that the robot workspace covers the canopy completely. A two-arm, Cartesian kiwifruit harvesting robot system and several field experiments are developed for the investigation. The harvest cycle time of the Cartesian robot system is compared to that of an articulated robot system. The difference is analyzed based on the workspace geometries of these two robot configurations.

Findings

It is found that the kiwifruit harvesting productivity is increased by using a multiple robot system with Cartesian configuration owing to its regular workspace geometry.

Originality/value

An articulated robot is a common configuration for manufacturing because of its simple structure and the relatively static factory environment. Most of the agricultural robotics research studies use single articulated robot for their implementation. This paper pinpoints how the workspace of a multiple robot system affects the harvest cycle time for kiwifruit harvesting in a pergola style kiwifruit orchard.

Details

Industrial Robot: the international journal of robotics research and application, vol. 47 no. 4
Type: Research Article
ISSN: 0143-991X

Keywords

Article
Publication date: 1 December 2021

Chi Kit Au, Michael Redstall, Mike Duke, Ye Chow Kuang and Shen Hin Lim

A harvesting robot is developed as part of kiwifruit industry automation in New Zealand. This kiwifruit harvester is currently not economically viable, as it drops and damages too…

Abstract

Purpose

A harvesting robot is developed as part of kiwifruit industry automation in New Zealand. This kiwifruit harvester is currently not economically viable, as it drops and damages too many kiwifruit in the harvesting task due to the positional inaccuracy of the gripper. This is due to the difficulties in measuring the exact effective dimensions of the gripper from the manipulator. The purpose of this study is to obtain the effective gripper dimensions using kinematic calibration procedures.

Design/methodology/approach

A setup of a constraint plate with a dial gauge is proposed to acquire the calibration data. The constraint plate is positioned above the robot. The data is obtained by using a dial gauge and a permanent marker. The effective dimensions of the gripper are used as error parameters in the calibration process. Calibration is exercised by minimizing the difference between target positions and measured positions iteratively.

Findings

The robot with the obtained effective dimensions is tested in the field. It is found that the fruit drops due to positional inaccuracy of the gripper are greatly reduced after calibration.

Practical implications

The kiwifruit industry in New Zealand is growing rapidly and announced plans in 2017 to double global sales by 2025. This growth will put extra pressure on the labour supply for harvesting. Furthermore, the Covid pandemic and resulting border restrictions have dramatically reduced seasonal imported labour availability. A robotic system is a potential solution to address the labour shortages for harvesting kiwifruit.

Originality/value

For kiwifruit harvesting, the picking envelope is well above the robot; the experimental data points obtained by placing a constraint plate above the robot are at similar positions to the target positions of kiwifruit. Using this set of data points for calibration yields a good effect of obtaining the effective dimension of the gripper, which reduces the positional inaccuracy as shown in the field test results.

Details

Industrial Robot: the international journal of robotics research and application, vol. 49 no. 5
Type: Research Article
ISSN: 0143-991X

Keywords

Article
Publication date: 27 May 2014

Prakash Sethi

In the past more than three years, Wal-Mart has been embroiled in incidents of public scandals. In part, they pertain to Wal-Mart’s global strategy of growth and expansion, where…

4279

Abstract

Purpose

In the past more than three years, Wal-Mart has been embroiled in incidents of public scandals. In part, they pertain to Wal-Mart’s global strategy of growth and expansion, where the company’s senior managers have been implicated in using illegal bribery and corruption to secure business and to conceal this information from regulatory authorities. Another issue, albeit longer running, has been the incidents of fire and resulting deaths and injuries of hundreds of people, most notably in Bangladesh, but also in other countries where low-skill, low-wage manufacturing predominates, and where foreign multinationals have been accused of condoning and profiting from sweatshop-like exploitation of workers.

Design/methodology/approach

The authors use Wal-Mart as a microcosm of corporate conduct which provides a prism through which to examine the exploitation of negative externalities, i.e. engaging in illegal and unethical behavior by using their bargaining power and market control these companies, pressure host countries to condone environmental degradation, violation of country laws in terms of wages, working conditions and operating in sweatshop-like conditions to maximize their profits at the expense of other factors of production, i.e. labor and resources.

Findings

The authors contend that Wal-Mart’s unique business model, which focuses on everyday low price, absolute growth and market share expansion by any means possible and everyday low cost, has led to the company’s enormous success since its founding and has made it one of the world’s largest corporations by revenue. At the same time, this model seriously impedes the company’s ability to improve unit-based profit margins and thus forces it to take short cuts in achieving lateral growth and low-cost production.

Social implications

The authors also examine in some detail the large gap that exists between Wal-Mart’s pronouncements of the company’s commitment to ethical and socially responsible conduct and its actual business practices. They demonstrate that the company’s communications and claims for ethical conduct are mostly aspirational and fail the test of accuracy, specificity, materiality and verifiability through independent, externally provided integrity assurance.

Originality/value

Finally, the authors outline a number of measures that would need to be taken by Wal-Mart, industry groups that depend heavily on outsourcing from low-skill, low-wage countries for their products and host country governments and the governments of Western industrialized nations whose corporations and consumers are the primary beneficiaries of the exploitative sweatshops that fatten their companies’ bottom lines and enrich their denizens with ample amounts of inexpensive goods.

Article
Publication date: 18 January 2016

Janaka Chandraguptha Rajaguru, Mike Duke and ChiKit Au

This paper aims to investigate the layer of material deposited on a sample of acrylic resin by electroless nickel plating process. Acrylic resin is a popular material in rapid…

Abstract

Purpose

This paper aims to investigate the layer of material deposited on a sample of acrylic resin by electroless nickel plating process. Acrylic resin is a popular material in rapid prototyping (RP) which uses the additive manufacturing technique to build prototypes for visual inspection, assembly, etc. Metallization of the RP materials can extend application envelop of RP techniques, as they can be used in decorative or functional applications.

Design/methodology/approach

Unlike electroless nickel plating on a metal substrate, the plating process for an acrylic resin substrate is different, as there is no metal ion for the auto-catalytic electroless reaction. Pre-treatment processes are performed on an acrylic resin sample to initiate electroless nickel plating. The morphology, chemical composition and structure of the layer deposited on the sample are examined using scanning electron microscopy, energy-dispersive spectroscopy and X-ray diffraction.

Findings

The investigation shows that a nickel phosphorous alloy layer is plated on to the substrate surface of the acrylic resin sample.

Originality/value

Plating a layer of nickel phosphorous alloy layer on an acrylic resin RP material can widen the application of RP technology. An application of nickel plated acrylic resin sample to rapid tooling for low-volume production plastic parts is presented.

Details

Rapid Prototyping Journal, vol. 22 no. 1
Type: Research Article
ISSN: 1355-2546

Keywords

Book part
Publication date: 3 December 2014

Jason Konefal, Maki Hatanaka and Douglas H. Constance

Efforts to increase sustainability are increasingly being promulgated using non-state forms of governance. Currently, there are multiple multi-stakeholder initiatives (MSIs…

Abstract

Efforts to increase sustainability are increasingly being promulgated using non-state forms of governance. Currently, there are multiple multi-stakeholder initiatives (MSIs) working to develop sustainability standards and metrics for US agriculture. These include: LEO-4000, Field to Market, and the Sustainability Consortium. Using Paul Thompson’s (2010) tripartite sustainability framework, the proposed sustainability standards and metrics of the three MSIs are assessed. Our findings indicate that the current political economic stakeholder nexus is producing incremental adjustments to the status quo of industrial agriculture. Put differently, the standards and metrics being produced by these initiatives are largely advancing programs of sustainable intensification in which sustainability is equated with increasing resource efficiencies. Hence, our research problematizes the efficacy of non-state governance approaches for transformative change in food and agriculture. The findings in this chapter are based on fieldwork conducted between 2011 and 2013.

Details

Alternative Agrifood Movements: Patterns of Convergence and Divergence
Type: Book
ISBN: 978-1-78441-089-6

Book part
Publication date: 15 July 2009

Ciaran Heavey, Richard T. Mowday, Aidan Kelly and Frank Roche

This chapter attempts to reinvigorate scholarly interest in executive scanning by outlining a model to guide future research on executive search within the context of…

Abstract

This chapter attempts to reinvigorate scholarly interest in executive scanning by outlining a model to guide future research on executive search within the context of international strategy. Executive scanning has received considerable empirical attention but only limited theoretical attention. Most of this research has studied scanning as the receipt rather than the search for information. Based on the application of learning theory, we outline a model advancing two broad categories of executive search exploitative and explorative, consisting of six specific search behaviors. We advance search as integral to managerial decisions relating to the various aspects of internationalization, notably choice of location, corporate strategy, and mode of entry. The implications for future research are presented.

Details

Advances in Global Leadership
Type: Book
ISBN: 978-1-84855-256-2

Case study
Publication date: 11 September 2023

K B S Kumar and Indu Perepu

Addresses the issue of Gender Equality – UN Sustainable Development Goal No.5. Discusses the topic of diversity, equity and inclusion. Presents the challenges faced by women of…

Abstract

Social implications

Addresses the issue of Gender Equality – UN Sustainable Development Goal No.5. Discusses the topic of diversity, equity and inclusion. Presents the challenges faced by women of color in workplace and shows the capabilities needed to overcome these challenges.

Learning outcomes

Analyze the capabilities that women of color need to become successful leaders. Explore the importance of Diversity, Equity and Inclusion (DEI) in organizations and the role played by leaders in promoting DEI. Understand what inclusive leadership is. Examine the strategic leadership skills that leaders need to possess.

Case overview/synopsis

In March 2021, one of the largest drugstore chains in the USA, Walgreens Boots Alliance, a US$140bn company, announced that Rosalind Brewer (Brewer) (she) would be its new CEO. With the announcement, Brewer became the third black woman in history to lead a Fortune 500 company. After graduating in organic chemistry, Brewer joined Kimberly Clark and went on to lead the Nonwovens business. She then joined Walmart as Vice President. Brewer then moved to Starbucks as Head of Operations. Being an inclusive leader, Brewer brought in several changes to smoothen the operations and make the organizations employee-friendly. At the same time, as a black woman in a leadership position, she faced several challenges, which she overcame. As an advocate of DEI, Brewer strove to take diversity beyond just numbers. After becoming the CEO Boots Walgreens, Brewer was looking at taking medicines to masses and making healthcare affordable and available.

Complexity academic level

MBA/MS/Executive Education.

Supplementary materials

Teaching Notes are available for educators only.

Subject code

CCS 6: Human Resources.

Details

The Case For Women, vol. no.
Type: Case Study
ISSN: 2732-4443

Keywords

Article
Publication date: 29 March 2011

Peter Jones, Daphne Comfort and David Hillier

The aims of this paper are to provide an exploratory general review of both the sustainability agendas being publicly reported by the world's leading retailers and the nature of…

6234

Abstract

Purpose

The aims of this paper are to provide an exploratory general review of both the sustainability agendas being publicly reported by the world's leading retailers and the nature of the reporting process and to offer some wider reflections on the ways these retailers are currently addressing and pursuing sustainability agendas.

Design/methodology/approach

The paper begins with a short discussion of the characteristics of sustainability. The paper draws its empirical material from the most recent sustainability reports and information posted on the internet by eight of the world's top ten retailers.

Findings

The findings reveal that while there is considerable variation in the structure of the retailers' sustainability reports, three broad sets of themes can be identified. Namely, the environmental, social and economic issues the retailers report on, how these issues are reported, and the role and importance of sustainability within companies and to their business. More critically, it is argued that the world's leading retailers are, at best, adopting a “weak” model of sustainability and that in pursuing continuing growth they are ignoring the fact that the present patterns of consumption are unsustainable in the long term.

Originality/value

The paper provides an accessible review of, and some reflections on, the sustainability agendas being pursued by some of the world's leading retailers and as such it will interest academics and those working in management positions within the retail industry.

Details

International Journal of Retail & Distribution Management, vol. 39 no. 4
Type: Research Article
ISSN: 0959-0552

Keywords

Book part
Publication date: 13 January 2011

Karen Weaver

Many of the largest athletics programs in the United States today are dependent upon revenue streams to sustain their teams. While still in the earliest stages, athletic…

Abstract

Many of the largest athletics programs in the United States today are dependent upon revenue streams to sustain their teams. While still in the earliest stages, athletic professionals are finding ways to deepen the engagement with potential and current fans and donors with their department's mission and values. Social media is being used to put fans in the seats as well as create new paid content. No longer limited to the column inches in a newspaper or 30 seconds of highlights on the local news, athletics programs are breaking new grounds in the world of social media.

Details

Higher Education Administration with Social Media
Type: Book
ISBN: 978-0-85724-651-6

1 – 10 of 265