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Article
Publication date: 26 November 2019

Yunhwa Kim

The purpose of this paper is to determine the function of adulterated food management (AFM) in the behavioural intentions of adolescents on food safety concerns.

Abstract

Purpose

The purpose of this paper is to determine the function of adulterated food management (AFM) in the behavioural intentions of adolescents on food safety concerns.

Design/methodology/approach

The methodology is exploratory in nature and uses analysis of variance and regression in determining the predictive power of the independent variables (AFM’s mediator variables) on the dependent variables (food safety concern and AFM behaviour intention). For this, a survey was conducted on middle and high school students in South Korea using a five-point Likert scale.

Findings

Perceived beliefs on, and competency and behavioural intention in, AFM significantly differed depending on food safety concern level (p<0.01). When perceived beliefs and competencies of AFM were regressed against behavioural intention, the model was highly significant and showed huge variance (R2=0.65). The factors influencing AFM in behavioural intention differed among all three groups: high concern group (efficacy, attitude and situation management), medium concern group (benefits, efficacy, attitude, situation management and hygiene practices) and low concern group (benefits, barriers and situation management). Therefore, AFM education should be observed with emphasis on varying points depending on the level of food safety concern.

Research limitations/implications

As this study only focused on exploring probable predictors for the criterion (perceived food safety concern), the contributions of each mediator factor to the full model are not covered in this study. Future investigations can include the study of individual variables and residuals to remove biases that may be present in the model.

Originality/value

The study will contribute to the safety of society and the health of adolescents by solving the issue of food safety and the problem of adulterated food in the aspect of the beliefs and competence of adolescents according to their concern level.

Details

British Food Journal, vol. 122 no. 1
Type: Research Article
ISSN: 0007-070X

Keywords

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Article
Publication date: 3 April 2007

Robert E. Williams, Daniel F. Walczyk and Hoang T. Dang

To determine the feasibility of sealing and finishing conformal cooling/heating channels in profiled edge laminae (PEL) rapid tooling (RT) using abrasive flow machining (AFM).

Abstract

Purpose

To determine the feasibility of sealing and finishing conformal cooling/heating channels in profiled edge laminae (PEL) rapid tooling (RT) using abrasive flow machining (AFM).

Design/methodology/approach

Sample PEL tools constructed of both aluminum and steel were designed and assembled for finishing by AFM. A simple design of experiments approach was utilized. Output parameters of interest included the material removal, surface roughness improvement and, most importantly, the ability to withstand a pressurized oil leak test.

Findings

AFM significantly improved the finish in the channels for aluminum and steel PEL tooling. Leak testing found that AFM also improved the sealing of both stacks at static pressures up to 690 kPa. The steel tooling appeared to benefit more from the AFM process. It has been postulated that the primary cause of the sealing is the plastic deformation of workpiece material in the plowing mode.

Research limitations/implications

The conformal channels studied had a simple cross‐sectional geometry and straight runs. The PEL tools were only made of two materials. However, the research results show great promise for large RT, including thermoforming and composite forming molds where temperature control is a critical issue.

Practical implications

The ability to seal the interfaces between individual laminae expands the potential application of AFM tremendously. AFM also has the potential to finish a wide range of internal passages in a variety of RT.

Originality/value

AFM has been previously used for finishing stereolithography prototypes. This is the first known attempt to seal and finish channels in laminated RT using AFM.

Details

Rapid Prototyping Journal, vol. 13 no. 2
Type: Research Article
ISSN: 1355-2546

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Article
Publication date: 24 June 2019

Adrian Młot and Marian Łukaniszyn

Analysis of test data monitored for a number of electric machines from the low volume production line can lead to useful conclusions. The purpose of this paper is to trace…

Abstract

Purpose

Analysis of test data monitored for a number of electric machines from the low volume production line can lead to useful conclusions. The purpose of this paper is to trace the machine performance to find quality-related issues and/or identify assembly process ones. In this paper, the monitoring of experimental data is related to the axial flux motor (AFM) used in hybrid electric vehicle (HEV) and in electric vehicle (EV) traction motors in the global automobile market.

Design/methodology/approach

Extensive data analyses raised questions like what could be the causes of possible performance deterioration of the AFM and how many electric motors may not pass requirements during operation tests. In small and medium research units of AFM for HEV or EV, engineers came across a number of serious issues that must be resolved. A number of issues can be eliminated by implementing methods for reducing the number of failing AFMs. For example, improving the motor assembly precision leads to reduction of the machine parameters deterioration.

Findings

Assembly tolerances on electric motor characteristics should be investigated during motor design. The presented measurements can be usable and can point out the weakest parts of the motor that can be a reason for the reduced efficiency and/or lifetime of the AFM. Additionally, the paper is addressed to electric motor engineers designing and/or investigating electric AFMs.

Originality/value

Performance of AFM was monitored for a number of identical motors from low volume production line. All tested motors were operated continuously for a long period of time and the tests were repeated every few weeks for half a year to check the reliability of motor design and indicate how much the motor parameters may change. The final results point how many motors fail the requirements of motor performance. A few batches of AFM were selected for testing. Each batch represents a different size (nominal power) of the same type of AFM.

Details

COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, vol. 38 no. 4
Type: Research Article
ISSN: 0332-1649

Keywords

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Article
Publication date: 9 July 2020

Julian Ferchow, Harry Baumgartner, Christoph Klahn and Mirko Meboldt

Internal channels produced by selective laser melting (SLM) have rough surfaces that require post-processing. The purpose of this paper is to develop an empirical model…

Abstract

Purpose

Internal channels produced by selective laser melting (SLM) have rough surfaces that require post-processing. The purpose of this paper is to develop an empirical model for predicting the material removal and surface roughness (SR) of SLM-manufactured channels owing to abrasive flow machining (AFM).

Design/methodology/approach

A rheological model was developed to simulate the viscosity and power-law index of an AFM medium. To simulate the pressure distribution and velocity in the SLM channels, the fluid behavior and SR in the channels were simulated by using computational fluid dynamics. The results of this simulation were then applied to create an empirical model that can be used to predict the SR and material removal thickness. To verify this empirical model, it was applied to an actual part fabricated by SLM. The results were compared with the measurements of the SR and channel diameter subsequent to AFM.

Findings

The proposed model exhibits maximum deviation between the model and the measurement of −1.1% for the down-skin SR, −0.2% for the up-skin SR and −0.1% for material removal thickness.

Practical implications

The results of this study show that the proposed model can avoid expensive iterative tests to determine whether a given channel design leads to the desired SR after smoothing by AFM. Therefore, this model helps to design an AFM-ready channel geometry.

Originality/value

In this paper, a quantitatively validated AFM model was proposed for complex SLM channels with varying orientation angles.

Details

Rapid Prototyping Journal, vol. 26 no. 7
Type: Research Article
ISSN: 1355-2546

Keywords

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Article
Publication date: 1 June 1998

Robert E. Williams and Vicki L. Melton

This research investigated the use of two relatively new technologies, abrasive flow machining (AFM) and stereolithography (SL), to minimize the time to develop a finished…

Abstract

This research investigated the use of two relatively new technologies, abrasive flow machining (AFM) and stereolithography (SL), to minimize the time to develop a finished prototype. Statistical analysis was used to determine effects of media grit size, media pressure, build style, build orientation and resin type on flatness, material removal rate and surface roughness. Results indicated that media pressure, grit size, and build orientation were significant in at least one of the experiments performed. Scanning electron microscope (SEM) images showed the stair‐stepping effect of the SL process before AFM and the removal of the stair‐stepping after AFM. The SEM images showed a lack of typical AFM flowlines on the surface and suggested that the workpiece material is removed by brittle fracture. Data dependent systems analysis techniques were also used to study the surface roughness profiles.

Details

Rapid Prototyping Journal, vol. 4 no. 2
Type: Research Article
ISSN: 1355-2546

Keywords

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Article
Publication date: 1 December 2005

Jun‐E Qu, Xing‐Peng Guo and Zhen‐Yu Chen

To investigate the influence of an organic corrosion inhibitor on the enhanced dissolution of metal, initiated by AFM tip scratching in corrosive media.

Abstract

Purpose

To investigate the influence of an organic corrosion inhibitor on the enhanced dissolution of metal, initiated by AFM tip scratching in corrosive media.

Design/methodology/approach

The test solutions were 1.5 M NaCl and 0.01 M HCl. AFM tip scratching experiments were performed for Cu‐Ni alloys in solutions with or without 0.005 M dodecylamine. AFM frictional loop tests were also performed to investigate the effect of dodecylamine on the tip‐surface frictional interaction.

Findings

Enhanced dissolution of Cu‐Ni alloy was observed as a result of AFM tip scratching both in NaCl and HCl solutions, and in HCl the effect was more severe than was the case in NaCl. Enhanced dissolution was inhibited markedly by adding 0.005 M dodecylamine to the corrosive media. The results of frictional loop tests indicated that frictional interaction between the tip and the alloy surface was diminished by the adsorption of dodecylamine on the sample surface. The weakening of tip‐surface frictional interaction and the elevation of the ionization energy of metal atoms were responsible for the notable inhibition effect of dodecylamine on the accelerated dissolution.

Originality/value

In this paper, the influence of an organic corrosion inhibitor on the corrosion of metal induced by outside forces was investigated. This was carried out initially by AFM scratching skill and the inhibition mechanism of dodecylamine on the enhanced dissolution of Cu‐Ni alloy initiated by AFM tip scratching.

Details

Anti-Corrosion Methods and Materials, vol. 52 no. 6
Type: Research Article
ISSN: 0003-5599

Keywords

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Article
Publication date: 15 March 2013

Anna Arutunow, Artur Zieliński and Mateusz T. Tobiszewski

The purpose of this paper is to present the results of an atomic force microscopy (AFM) based approach to local impedance spectroscopy (LIS) measurement performed on…

Abstract

Purpose

The purpose of this paper is to present the results of an atomic force microscopy (AFM) based approach to local impedance spectroscopy (LIS) measurement performed on AA2024 and AA2024‐T3 aluminium alloys.

Design/methodology/approach

AFM‐LIS measurements were performed ex‐situ without the electrolyte environment, so in fact the electrical not electrochemical impedance was obtained.

Findings

Relative local impedance values recorded for AA2024 alloy during the researches carried out were maximally approximately three orders of magnitude higher than the ones obtained for age‐hardened AA2024‐T3 alloy. Moreover, in the case of AA2024‐T3 alloy, a region located in the interior of α crystals exhibited localized impedance one order of magnitude higher than that measured at its grain boundary when affected by intergranular corrosion.

Originality/value

The paper presents differences in localized impedance between grain and grain boundaries activity.

Details

Anti-Corrosion Methods and Materials, vol. 60 no. 2
Type: Research Article
ISSN: 0003-5599

Keywords

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Article
Publication date: 1 January 1998

Kamal Naser

After the ratification of the peace treaty and the establishment of diplomatic relations with Israel, Jordan was expected to play a major role in the Middle East financial…

Abstract

After the ratification of the peace treaty and the establishment of diplomatic relations with Israel, Jordan was expected to play a major role in the Middle East financial market. As a result of the peace treaty Jordan may attract overseas investors to invest in the Amman Financial Market (AFM). Consequently, the level of information disclosed by companies listed on the AFM will become an important issue for prospective investors. This study empirically examined the effect of specific financial characteristics on the comprehensiveness of disclosure in the annual reports of a sample of 54 companies listed on the AFM. The variables tested in this study were market related: industry, audit firm size and market capitalisation; performance related: profit margin, return on equity and liquidity, and structure related: assets, sales, leverage and ownership. The empirical evidence revealed that company size (measured by assets and market capitalisation), leverage and return on equity were statistically related to the comprehensiveness of disclosure of the sample companies listed on the AFM. Reporting improved after international standards were adopted. Large companies were more involved in long term borrowing which requires detailed reporting. Size was the main predictor in comprehensive reporting.

Details

International Journal of Commerce and Management, vol. 8 no. 1
Type: Research Article
ISSN: 1056-9219

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Book part
Publication date: 8 April 2004

Steven J Karau and Janice R Kelly

Despite the potentially vital implications of time pressure for group performance in general and team effectiveness in particular, research has traditionally neglected the…

Abstract

Despite the potentially vital implications of time pressure for group performance in general and team effectiveness in particular, research has traditionally neglected the study of time limits and group effectiveness. We examine the small, but growing, body of research addressing the effect of time pressure on group performance and introduce our Attentional Focus Model of group effectiveness (Karau & Kelly, 1992). We examine recent research on the utility of the model and identify selected implications of the model for how time pressure may interact with other factors such as task type, group structure, and personality to influence team performance. Finally, we discuss methodological issues of studying attention, interaction processes, and team performance.

Details

Time in Groups
Type: Book
ISBN: 978-0-76231-093-7

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Article
Publication date: 7 October 2020

Yizhi Shao, Oluwamayokun Bamidele Adetoro and Kai Cheng

This study aims to optimize the manufacturing process to improve the manufacturing quality, costs and delivering time with the help of multiscale multiphysics modelling…

Abstract

Purpose

This study aims to optimize the manufacturing process to improve the manufacturing quality, costs and delivering time with the help of multiscale multiphysics modelling and simulation. Multiscale multiphysics-based modelling and simulations are receiving more and more interest by research community and the industry particularly in the context of increasing demands for manufacturing high precision complex products and understanding the intrinsic complexity in associated manufacturing processes.

Design/methodology/approach

In this paper, some modelling and analysis techniques using multiscale multiphysics modelling are presented and discussed.

Findings

Furthermore, the possibility of adopting the multiscale multiphysics modelling and simulation to develop the virtual machining system is evaluated, and further supported with an industrial case study on abrasive flow machining (AFM) of integrally bladed rotors using the techniques and system developed.

Originality/value

With the development of multiscale multiphysics-based modelling and simulation, it will enable effective and efficient optimisation of manufacturing processes and further improvement of manufacturing quality, costs, delivery time and the overall competitiveness.

1 – 10 of 586