Obtaining the effective gripper dimensions for a kiwifruit harvesting robot using kinematic calibration procedures

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Chi Kit Au ◽  
Michael Redstall ◽  
Mike Duke ◽  
Ye Chow Kuang ◽  
Shen Hin Lim

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.

2019 ◽  
Vol 68 (8/9) ◽  
pp. 652-673 ◽  
Author(s):  
Maja Krtalić ◽  
Ivana Hebrang Grgić

Purpose The purpose of this paper was to explore how small immigrant communities in host countries collect, disseminate and present information about their home country and their community, and the role of formal societies and clubs in it. Design/methodology/approach This paper presents the results of a case study of the Croatian community in New Zealand. To illustrate how cultural and technological changes affected information dissemination and communication within the community, the case study presents both historical and current situations. Methods used in this case study included a content analysis of historical newspapers published in New Zealand by the Croatian community, content analysis of current webpages and social networking sites, and interviews with participants who have management roles in Croatian societies and communities in New Zealand. Data were collected from December 2018 to February 2019. Findings Formally established clubs and societies, but also informal groups of immigrants and their descendants can play a significant role in providing their members with information about the culture, social life and events of the home country. They also play a significant role in preserving part of the history and heritage which is relevant, not only for a specific community but also for the history and culture of a home country. Originality/value The methodology used in the research is based on data from community archives and can be used for studying other small immigrant communities in New Zealand or abroad. The case study presented in the paper illustrates how the information environment of small immigrant communities develops and changes over the years under the influence of diverse political, social and technological changes.


2016 ◽  
Vol 38 (6) ◽  
pp. 886-906 ◽  
Author(s):  
Erling Rasmussen ◽  
Barry Foster ◽  
Deirdre Farr

Purpose The purpose of this paper is to place empirical research on New Zealand employers’ attitudes to collective bargaining and legislative change within the context of the long running debate of flexibility. Design/methodology/approach A cross-sectional survey design using a self-administered postal questionnaire, covering private sector employers with ten or more staff and including employers within all 17 standard industry classification. To explore particular issues, an additional in-depth interviews were conducted of 25 employers participating in the survey. Findings It is found that employers support overwhelmingly recent legislative changes though there are variations across industries and firm sizes. There is also considerable variation in terms of which legislative changes are applied in the workplace. Despite fewer constraints on employer-determined flexibility, there was a rather puzzling finding that most employers still think that employment legislation is even balanced or favouring employees. Originality/value Cross-sectional survey findings of New Zealand employer attitudes to legislative changes are few and provide valuable data for policy makers, unions, employers and employment relations researchers. The paper also contributes to a more comprehensive understanding of pressures to increase employer-determined flexibility in many western countries.


2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Jilnaught Wong ◽  
Norman Wong ◽  
Willow Yangliu Li

Purpose This paper aims to examine the financial statement impact resulting from the tax depreciation on buildings that was reinstated on 25 March 2020 as part of the New Zealand Government’s coronavirus (COVID-19) tax support package. The COVID-19 pandemic and the tax relief created an accounting response to map the environment to accounting reports, reversing previously recognized deferred tax liabilities and increasing reported income as a result. Design/methodology/approach This is an exploratory and descriptive study to understand the accounting response and impact on companies’ financial statements following a COVID-19 tax relief to support businesses in a dire financial situation as the effects of COVID-19 took hold. Findings First, the accounting response provided the appropriate mapping from the COVID-19 environment to accounting reports. Second, the financial statement impacts are material, especially for companies with extensive holdings of buildings that are held for use. Third, while the accounting relief was immediate, the economic (cash flow) support does not occur until a year later. Research limitations/implications The financial statement impacts are based on a subset of NZX 50 companies with the available information at the time of writing. However, they do not compromise the external validity of the findings because the tax depreciation relief applies to other listed companies, unlisted public and private companies, trust, partnerships and individuals. Practical implications The New Zealand Government could have been more helpful to businesses by allowing an immediate depreciation deduction in the 2020 year as opposed to implementing it from 2021. Further, it could have legislated a backlog depreciation deduction from 2010 – when the depreciation on buildings was disallowed – to 2020. Originality/value This paper documents the evolution of the accounting for deferred taxes when the New Zealand Government withdrew the tax depreciation in 2010, how NZ IAS 12 evolved as a result of that event and now the reversal effect with the reinstatement of the tax depreciation during COVID-19. The paper also blends in the accounting responses and considers whether they are opportunistic or efficient.


2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Mohini P. Vidwans ◽  
Rosalind H. Whiting

PurposeThe purpose of this study is to explore the struggle for entry and career success of the early pioneer women accountants in Great Britain and its former colonies the USA, Canada, Australia and New Zealand.Design/methodology/approachA career crafting matrix guides the analysis of historical information available on five pioneer women accountants in order to understand their success in gaining entry into the profession and their subsequent careers.FindingsDespite an exclusionary environment, career crafting efforts coupled with family and organizational support enabled these women to become one of the first female accountants in their respective countries. Their struggles were not personal but much broader—seeking social, political, economic and professional empowerment for women.Originality/valueThis is the first paper to utilize the career crafting matrix developed from current female accountants' careers to explore careers of pioneering female accountants. It adds to the limited literature on women actors in accounting and may provide insight into approaching current forms of difference and discrimination.


Significance The possibility of Japan joining the alliance is now seriously discussed in Tokyo and the capitals of the Five Eyes members -- the United States, United Kingdom, Canada, Australia and New Zealand. Joining Five Eyes would signal Japan’s even deeper integration into US alliance structures, regionally and globally, and raise expectations for Japan to act as a fuller ally in all sorts of contingencies. Impacts Japan’s greatest potential contribution to allies is probably in signals and imagery intelligence, especially vis-a-vis China. The prime minister will avoid opening up a controversial foreign policy issue so close to a general election; his successor may be bolder. Japan’s partners still run a risk of leaks due to Japan’s lag in cybersecurity and institutional arrangements, but this is decreasing.


2017 ◽  
Vol 117 (5) ◽  
pp. 498-510 ◽  
Author(s):  
Lisette Burrows

Purpose The purpose of this paper is to explore ways in which children and young people are being positioned as change agents for families through school health promotion initiatives in New Zealand. Design/methodology/approach The paper maps and describes the kinds of policies and initiatives that directly or indirectly regard children as conduits of healthy eating and exercise messages/practices for families. Drawing on post-structural theoretical frameworks, it explores what these resources suggest in terms of how healthy families should live. Findings Families are positioned as central to school health promotion initiatives in New Zealand, especially in relation to obesity prevention policies and strategies. Children are further positioned as agents of change for families in many of the resources/policies/initiatives reviewed. They are represented as key transmitters and translators of school-based health knowledge and as capable of, and responsible for, helping their families eat well and exercise more. Social implications While recognising children’s agency and capacity to translate health messages is a powerful and welcome message at one level, the author need to consider the implications of requiring children to convey health information, to judge their family practices and, at times, to be expected to change these. This may create anxiety, family division and expect too much of children. Originality/value The paper takes a novel post-structural perspective on a familiar health promotion issue. Given the proliferation of family-focussed health initiatives in New Zealand and elsewhere, this perspective may help us to explore, critique and understand more fully how children are expected to be engaged in these initiatives, and the potentially harmful implications of these expectations.


2018 ◽  
Vol 30 (4) ◽  
pp. 433-443 ◽  
Author(s):  
Russell Craig ◽  
Rawiri Taonui ◽  
Susan Wild ◽  
Lũcia Lima Rodrigues

Purpose This paper aims to highlight the accountability reporting objectives of four Māori-controlled organizations. The examples cited reflect the core values of the indigenous Māori people of New Zealand (Aotearoa) and help demonstrate how these values are manifest in the accountability reporting of Māori-controlled organizations. Design/methodology/approach Narrative sections of ten annual reports of two small and two large Maori organizations, drawn variously from their financial years ending in the calendar years 2009 to 2014, are read closely. These organizations represent diverse tribal and regional associations in terms of size, scope and structure; and in terms of the business, social and cultural activities they pursue. Findings Three core Māori values are identified: spirituality (wairuatanga); intergenerationalism and restoration (whakapapa); and governance, leadership and respect (mana and rangatiratanga). The commitment to these values and the way this commitment is reflected in accountability reports of Maori organizations, is presented. Originality/value The examples provided, and the associated discussion, should help inform reporting initiatives of organizations that are seeking better accountability in terms of their long-term engagement with indigenous communities, the environment and broader society.


2018 ◽  
Vol 30 (4) ◽  
pp. 463-481 ◽  
Author(s):  
Bart Frijns ◽  
Ivan Indriawan

Purpose This paper aims to assess the ability of New Zealand (NZ) actively managed funds to generate risk-adjusted outperformance using portfolio holdings data. Focusing on domestic equity allocations addresses the benchmark selection issue, particularly for funds with national and international exposures. Design/methodology/approach The authors assess performance using several asset pricing models including the CAPM, three-factor and four-factor models. The authors also assess performance across funds with different characteristics such as fund size, size of local holdings, type of fund provider, past returns and fees. The authors further examine whether funds engage in any stock-picking or market timing by considering the active share and tracking error. Findings The returns on NZ equity holdings of NZ actively managed funds from 2010 to 2017 provide little evidence of risk-adjusted outperformance and stock-picking skill. These exposures yield pre-cost returns that have a nearly perfect correlation with the market index and an insignificant alpha. Funds show little tendency to bet on any of the main characteristics known to predict stock returns, such as size, book-to-market and momentum. In addition, the authors show that the average active shares and tracking errors are low, suggesting that the majority of funds hold NZ equity portfolios that closely mimic the market index. Originality/value Existing studies rely on returns data which aggregate performance across all asset classes with varying exposures. This may lead to benchmark selection issues (particularly for funds with international exposures) which may obscure the fund manager’s true stock-picking skills. Assessment using holdings data would enable suitable performance measurement by researchers and industry analysts.


2016 ◽  
Vol 82 (19) ◽  
pp. 5951-5959 ◽  
Author(s):  
Paul M. D'Agostino ◽  
Vivek S. Javalkote ◽  
Rabia Mazmouz ◽  
Russell Pickford ◽  
Pravin R. Puranik ◽  
...  

ABSTRACTThe mycosporine-like amino acids (MAAs) are a group of small molecules with a diverse ecological distribution among microorganisms. MAAs have a range of physiological functions, including protection against UV radiation, making them important from a biotechnological perspective. In the present study, we identified a putative MAA (mys) gene cluster in two New Zealand isolates ofScytonemacf.crispum(UCFS10 and UCFS15). Homology to “Anabaena-type”mysclusters suggested that this cluster was likely to be involved in shinorine biosynthesis. Surprisingly, high-performance liquid chromatography analysis ofS. cf.crispumcell extracts revealed a complex MAA profile, including shinorine, palythine-serine, and their hexose-bound variants. It was hypothesized that a short-chain dehydrogenase (UCFS15_00405) encoded by a gene adjacent to theS. cf.crispummyscluster was responsible for the conversion of shinorine to palythine-serine. Heterologous expression of MysABCE and UCFS15_00405 inEscherichia coliresulted in the exclusive production of the parent compound shinorine. Taken together, these results suggest that shinorine biosynthesis inS. cf.crispumproceeds via anAnabaena-type mechanism and that the genes responsible for the production of other MAA analogues, including palythine-serine and glycosylated analogues, may be located elsewhere in the genome.IMPORTANCERecently, New Zealand isolates ofS. cf.crispumwere linked to the production of paralytic shellfish toxins for the first time, but no other natural products from this species have been reported. Thus, the species was screened for important natural product biosynthesis. The mycosporine-like amino acids (MAAs) are among the strongest absorbers of UV radiation produced in nature. The identification of novel MAAs is important from a biotechnology perspective, as these molecules are able to be utilized as sunscreens. This study has identified two novel MAAs that have provided several new avenues of future research related to MAA genetics and biosynthesis. Further, we have revealed that the genetic basis of MAA biosynthesis may not be clustered on the genome. The identification of the genes responsible for MAA biosynthesis is vital for future genetic engineering.


2014 ◽  
Vol 116 (8) ◽  
pp. 1346-1368 ◽  
Author(s):  
Rao Sanaullah Khan ◽  
John Vincent Grigor ◽  
Alan G. Win ◽  
Mike Boland

Purpose – The purpose of this paper is to sketch a comparative account of NPD approaches between registered New Zealand food companies that are doing some sort of functional foods (FF) development (Group 1) and those that are not (Group 2); to generate a better understanding of differences and commonalities in their NPD approaches from resource-based view of competitive advantage. Design/methodology/approach – This paper opted an exploratory approach using a quantitative survey across food manufacturing companies in New Zealand. The primary foci of this empirical investigation were: orientation towards the NPD, innovation processes, collaborative NPD links and routes to commercialisation. Findings – The results (based on a 22 per cent response rate) show a significant difference (p<0.05) in the aims and mode of NPD between Groups 1 and 2. Further it was observed that food companies in Group 1 have significantly (p<0.05) more diverse external collaborations with broader aims to collaborate, in comparison with food companies in Group 2. Research limitations/implications – This study was conducted in New Zealand and thus generalisability of the findings may have to be interpreted carefully. Practical implications – The traditional NPD approach (independent and closed NPD), with loose intellectual property protection practices, dominates the food manufacturing industry in New Zealand. Research-oriented collaborations need to be strengthened in their scope and content to develop the innovative capabilities and capacities of small and medium enterprises (SME's) within future value-added food productions. Originality/value – This research provides the comparative narration of innovation process of food manufacturing companies with reference to FFs development.


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