Search results

1 – 10 of 117
Article
Publication date: 1 April 2002

Gunnar Bolmsjö, Magnus Olsson and Per Cederberg

The development of robotized welding is truly impressive and is today one of the major application areas for industrial robots. The first industrial robots were introduced in the…

1491

Abstract

The development of robotized welding is truly impressive and is today one of the major application areas for industrial robots. The first industrial robots were introduced in the early 1960s for material transfer and machine tending. Not long after that, robots were used for spot welding and in the early 1970s for arc welding as well. During the years, significant developments have taken place both concerning the robot equipment and the welding equipment to meet the different challenges within the application area. This paper describes the development and progress of robotization in welding over the years and also some projections and trends for the near future.

Details

Industrial Robot: An International Journal, vol. 29 no. 2
Type: Research Article
ISSN: 0143-991X

Keywords

Article
Publication date: 1 June 2004

Rolf Johansson, Anders Robertsson, Klas Nilsson, Torgny Brogårdh, Per Cederberg, Magnus Olsson, Tomas Olsson and Gunnar Bolmsjö

Presents an approach to improved performance and flexibility in industrial robotics by means of sensor integration and feedback control in task‐level programming and task…

Abstract

Presents an approach to improved performance and flexibility in industrial robotics by means of sensor integration and feedback control in task‐level programming and task execution. Also presents feasibility studies in support of the ideas. Discusses some solutions to the problem using six degrees of freedom force control together with the ABB S4CPlus system as an illustrative example. Consider various problems in the design of an open sensor interface for industrial robotics and discusses possible solutions. Finally, presents experimental results from industrial force controlled grinding.

Details

Industrial Robot: An International Journal, vol. 31 no. 3
Type: Research Article
ISSN: 0143-991X

Keywords

Article
Publication date: 26 September 2009

Eline de Backer, Joris Aertsens, Sofie Vergucht and Walter Steurbaut

Sustainable agriculture implies the ability of agro‐ecosystems to remain productive in the long‐term. It is not easy to point out unambiguously whether or not current production…

3098

Abstract

Purpose

Sustainable agriculture implies the ability of agro‐ecosystems to remain productive in the long‐term. It is not easy to point out unambiguously whether or not current production systems meet this sustainability demand. A priori thinking would suggest that organic crops are environmentally favourable, but may ignore the effect of reduced productivity, which shifts the potential impact to other parts of the food provision system. The purpose of this paper is to assess the ecological sustainability of conventional and organic leek production by means of life cycle assessment (LCA).

Design/methodology/approach

A cradle‐to‐farm gate LCA is applied, based on real farm data from two research centres. For a consistent comparison, two functional units (FU) were defined: 1ha and 1 kg of leek production.

Findings

Assessed on an area basis, organic farming shows a more favourable environmental profile. These overall benefits are strongly reduced when the lower yields are taken into account. Related to organic farming it is therefore important that solutions are found to substantially increase the yields without increasing the environmental burden. Related to conventional farming, important potential for environmental improvements are in optimising the farm nutrient flows, reducing pesticide use and increasing its self‐supporting capacity.

Research limitations/implications

The research is a cradle‐to‐farm gate LCA, future research can be expanded to comprise all phases from cradle‐to‐grave to get an idea of the total sustainability of our present food consumption patterns. The research is also limited to the case of leek production. Future research can apply the methodology to other crops.

Originality/value

To date, there is still lack of clear evidence of the added value of organic farming compared to conventional farming on environmental basis. Few studies have compared organic and conventional food production by means of LCA. This paper addresses these issues.

Details

British Food Journal, vol. 111 no. 10
Type: Research Article
ISSN: 0007-070X

Keywords

Article
Publication date: 1 April 2010

E. van Wyk

Biodiversity conservation tax incentives were inserted into the Income Tax Act 58 of 1962 in terms of the Revenue Laws Amendment Act 60 of 2008 and are now contained in section…

Abstract

Biodiversity conservation tax incentives were inserted into the Income Tax Act 58 of 1962 in terms of the Revenue Laws Amendment Act 60 of 2008 and are now contained in section 37C. The objectives of this study were to quantify the maximum potential revenue loss, to National Treasury, as a result of these tax incentives granted to landowners in the Western Cape; to identify and discuss alternative policy instruments to encourage conservation; and to investigate the perceptions of landowners in the Western Cape on the tax and alternative incentives available for conservation. The study found that the maximum tax revenue foregone should amount to a tiny percentage of total estimated revenue income for the 2008/2009 fiscal year, while projected future losses could also be insignificant. Landowners prefer direct financial incentives and exemption from property taxes, and contend that direct assistance with conservation activities would also be beneficial. The use of municipal value in the valuation of land would promote objectiveness and consistency. Finally, only a third of the landowners indicated that tax incentives would encourage them to commit more land for conservation.

Article
Publication date: 22 June 2021

Ida Schrøder, Emilia Cederberg and Amalie M. Hauge

This paper investigates how different and sometimes conflicting approaches to performance evaluations are hybridized in the day-to-day activities of a disciplined hybrid…

1063

Abstract

Purpose

This paper investigates how different and sometimes conflicting approaches to performance evaluations are hybridized in the day-to-day activities of a disciplined hybrid organization–i.e. a public child protection agency at the intersection between the market and the public sector.

Design/methodology/approach

The paper is based on a one-year ethnography of how employees achieve to qualify their work as “good work” in situations with several and sometimes conflicting ideals of what “good work” is. Fieldwork material was collected by following casework activities across organizational boundaries. By combining accounting literature on hybridization with literature on practices of valuation, the paper develops a novel theoretical framework which allows for analyses of the various practices of valuation, when and where they clash and how they persist over time in everyday work.

Findings

Throughout the study, four distinct registers of valuation were identified: feeling, theorizing, formalizing and costing. To denote the meticulous efforts of pursuing good work in all four registers of valuation, the authors propose the notion of sequencing. Sequencing is an ongoing process of moving conflicting registers away from each other and bringing them back together again. Correspondingly, at the operational level of a hybrid organization, temporary compartmentalization is a means of avoiding clashes, and in doing so, making it possible for different and sometimes conflicting ways of achieving good results to continuously hybridize and persist together.

Research limitations/implications

The single-case approach allows for analytical depth, but limits the findings to theoretical, rather than empirical, generalizability. The framework the authors propose, however, is well-suited for mobilization and potential elaboration in further empirical contexts.

Originality/value

The paper provides a novel theoretical framework as well as rich empirical material from the highly political field of child protection work, which has seldomly been studied within accounting research.

Details

Accounting, Auditing & Accountability Journal, vol. 35 no. 3
Type: Research Article
ISSN: 0951-3574

Keywords

Article
Publication date: 26 September 2009

Koen Mondelaers, Joris Aertsens and Guido Van Huylenbroeck

This paper aims to perform a meta‐analysis of the literature comparing the environmental impacts of organic and conventional farming and linking these to differences in management…

14513

Abstract

Purpose

This paper aims to perform a meta‐analysis of the literature comparing the environmental impacts of organic and conventional farming and linking these to differences in management practises. The studied environmental impacts are related to land use efficiency, organic matter content in the soil, nitrate and phosphate leaching to the water system, greenhouse gas emissions and biodiversity.

Design/methodology/approach

The theoretic framework uses the driver‐state‐response framework and literature data were analysed using meta‐analysis methodology. Meta‐analysis is the statistical analysis of multiple study results. Data were obtained by screening peer reviewed literature.

Findings

From the paper's meta‐analysis it can conclude that soils in organic farming systems have on average a higher content of organic matter. It can also conclude that organic farming contributes positively to agro‐biodiversity (breeds used by the farmers) and natural biodiversity (wild life). Concerning the impact of the organic farming system on nitrate and phosphorous leaching and greenhouse gas emissions the result of the analysis is not that straightforward. When expressed per production area organic farming scores better than conventional farming for these items. However, given the lower land use efficiency of organic farming in developed countries, this positive effect expressed per unit product is less pronounced or not present at all.

Original value

Given the recent growth of organic farming and the general perception that organic farming is more environment friendly than its conventional counterpart, it is interesting to explore whether it meets the alleged benefits. By combining several studies in one analysis, the technique of meta‐analysis is powerful and may allow the generation of more nuanced findings and the generalisation of those findings.

Details

British Food Journal, vol. 111 no. 10
Type: Research Article
ISSN: 0007-070X

Keywords

Article
Publication date: 13 May 2014

Mohsen Moradi Dalvand and Saeid Nahavandi

The purpose of this paper is to analyse teleoperation of an ABB industrial robot with an ABB IRC5 controller. A method to improve motion smoothness and decrease latency using the…

Abstract

Purpose

The purpose of this paper is to analyse teleoperation of an ABB industrial robot with an ABB IRC5 controller. A method to improve motion smoothness and decrease latency using the existing ABB IRC5 robot controller without access to any low-level interface is proposed.

Design/methodology/approach

The proposed control algorithm includes a high-level proportional-integral-derivative controller (PID) controller used to dynamically generate reference velocities for different travel ranges of the tool centre point (TCP) of the robot. Communication with the ABB IRC5 controller was performed utilising the ABB PC software development kit. The multitasking feature of the IRC5 controller was used to enhance the communication frequency between the controller and the remote application. Trajectory tracking experiments of a pre-defined three-dimensional trajectory were carried out and the benefits of the proposed algorithm were demonstrated. The robot was intentionally installed on a wobbly table and its vibrations were recorded using a six-degrees-of-freedom force/torque sensor fitted to the tool mounting interface of the robot. The robot vibrations were used as a measure of the smoothness of the tracking movements.

Findings

A communication rate of up to 250 Hz between the computer and the controller was established using C# .Net. Experimental results demonstrating the robot TCP, tracking errors and robot vibrations for different control approaches were provided and analysed. It was demonstrated that the proposed approach results in the smoothest motion with tracking errors of < 0.2 mm.

Research limitations/implications

The proposed approach may be employed to produce smooth motion for a remotely operated ABB industrial robot with the existing ABB IRC5 controller. However, to achieve high-bandwidth path following, the inherent latency of the controller must be overcome, for example by utilising a low-level interface. It is particularly useful for applications including a large number of short manipulation segments, which is typical in teleoperation applications.

Social implications

Using the proposed technique, off-the-shelf industrial robots can be used for research and industrial applications where remote control is required.

Originality/value

Although low-level control interface for industrial robots seems to be the ideal long-term solution for teleoperation applications, the proposed remote control technique allows out-of-the-box ABB industrial robots with IRC5 controllers to achieve high efficiency and manipulation smoothness without requirements of any low-level programming interface.

Details

Industrial Robot: An International Journal, vol. 41 no. 3
Type: Research Article
ISSN: 0143-991X

Keywords

Article
Publication date: 21 September 2012

Tina Eriksson‐Sjöö, Margareta Cederberg, Margareta Östman and Solvig Ekblad

This study aims to illuminate self‐perceived health‐related quality of life (HRQoL) among newly‐arrived Arabic‐speaking refugees in Malmö, Sweden participating in a specific group…

Abstract

Purpose

This study aims to illuminate self‐perceived health‐related quality of life (HRQoL) among newly‐arrived Arabic‐speaking refugees in Malmö, Sweden participating in a specific group Health Promotion activity.

Design/methodology/approach

Data consist of questionnaires, observations and oral evaluations in groups. Questions about HRQoL was measured by EQ‐5D self‐assessment containing five dimensions and three response options of severity, including a visual analog health rating scale. Participants' sleep patterns were measured by a sleep and recovery questionnaire with questions about sleep quality and sleep quantity.

Findings

The results show that disturbed sleep relates to EQ‐5D variables and to health rating scores. Moreover, there are changes over time and participants' perceptions of their health and quality of life in most EQ‐5D variables have significantly increased after the end of activity. In the variables pain and depression an improvement remains even at second follow up and health rating scores are higher at both follow ups relative to what it was originally. Sleep and recovery problems were perceived as less difficult at the course completion and second follow up.

Research limitations/implications

Because of practical and ethical reasons there is an absence of a control group in this study.

Practical implications

The paper includes implications for education in medicine, health care and social work, for the design of the refugee reception programs and for the inter‐professional collaborations.

Originality/value

The paper shows that health promotion interventions in group setting in the first stage of resettlement turn out to be useful according to HRQoL and knowledge of the health care system.

Details

International Journal of Migration, Health and Social Care, vol. 8 no. 3
Type: Research Article
ISSN: 1747-9894

Keywords

Article
Publication date: 5 May 2015

Victoria Campbell-Arvai

The purpose of this paper was to document the food-related environmental beliefs and behaviours of undergraduate university students. More specifically, this research was focussed…

4650

Abstract

Purpose

The purpose of this paper was to document the food-related environmental beliefs and behaviours of undergraduate university students. More specifically, this research was focussed on determining if environmental sustainability is a consideration in students’ food choices, identifying the specific choices and behaviours adopted to reduce their food-related environmental footprint, and documenting the role of gender and pro-environmental values in these food-related environmental beliefs and behaviours.

Design/methodology/approach

This research employed a mixed methods approach, i.e. focus group discussions and a survey, to document the food-related environmental beliefs and behaviours of undergraduate university students. The survey was informed by the results of the focus group discussions, and included standard measures of pro-environmental values and worldview.

Findings

Results from focus group discussions revealed a broad array of beliefs and behaviours related to the connection between food, food production and the environment. The survey confirmed these results, but indicated a preference for such actions as recycling and reducing food waste in contrast to such alternatives as reducing meat consumption or avoiding processed foods. These results suggest that educational campaigns could focus on strengthening beliefs about the food-environment connection, as well as help to empower students to take a greater variety of actions to reduce their food-related environmental footprint.

Originality/value

Relatively little attention has been focussed on individual beliefs and practices with respect to achieving more sustainable food consumption, particularly on university and college campuses. The research also represents a departure from previous work in that it utilizes both qualitative and quantitative methods, and takes a broad approach to the food-environment connection.

Details

International Journal of Sustainability in Higher Education, vol. 16 no. 3
Type: Research Article
ISSN: 1467-6370

Keywords

Article
Publication date: 9 July 2020

Claudia Gomez, B. Yasanthi Perera, Judith Y. Wesinger and David H. Tobey

The social capital used to access ethnic community resources is widely recognized in the literature as being important for immigrant entrepreneurship. However, there is limited…

Abstract

Purpose

The social capital used to access ethnic community resources is widely recognized in the literature as being important for immigrant entrepreneurship. However, there is limited knowledge regarding the extent to which immigrant entrepreneurs' agency, specifically their motivations, influence their use of, and contributions to, their ethnic social capital. In this paper, the authors explore this relationship.

Design/methodology/approach

Based on a qualitative approach, this research utilizes semi-structured interviews and thematic analysis to identify the motivations, sources and effects of ethnic social capital.

Findings

This research indicates that immigrant entrepreneurs have mixed motives when engaging with their ethnic communities. The findings suggest that the immigrant entrepreneurs' social capital–mediated interactions within their ethnic community are driven not only by the social structure but that their agency, specifically their motivations, play an important role in them. While entrepreneurs hold mixed motives, they recognize the importance of business success. Thus, they make concessions to their ethnic community and utilize its resources if doing so benefits their business.

Research limitations/implications

This research explores the role that immigrant entrepreneurs' motivations play in how they use and contribute to immigrant community social capital. By doing so, this study brings agency to the forefront of the discussion on immigrant entrepreneurship and social capital.

Practical implications

This study provides insight into the connection between the extent to which immigrant entrepreneurs utilize and contribute to their ethnic community's social capital, their motivations for doing so and the effect that these factors have on the businesses as well as their ethnic communities. This understanding might be useful for organizations seeking to foster immigrant entrepreneurship as well as for entrepreneurs themselves.

Originality/value

Individuals' motivations as they relate to social capital involve a variable that is rarely, if ever, considered – that is, individual agency. Thus, this research contributes this perspective to the immigrant entrepreneurship literature but also more broadly to the social capital and entrepreneurship fields. This research can be extended to understand the impact of entrepreneurs' motivations on the communities in which they are embedded.

Details

Journal of Small Business and Enterprise Development, vol. 27 no. 4
Type: Research Article
ISSN: 1462-6004

Keywords

1 – 10 of 117