scholarly journals Process control testing for fused filament fabrication

2017 ◽  
Vol 23 (2) ◽  
pp. 246-256 ◽  
Author(s):  
Stephen Oluwashola Akande ◽  
Kenny Dalgarno ◽  
Javier Munguia
Keyword(s):  
Mechanical Properties ◽  
Impact Test ◽  
Structural Integrity ◽  
Fused Filament Fabrication ◽  
Influence Of Process Parameters ◽  
Content Type ◽  
Machine Performance ◽  
And Control ◽  
The Impact

Purpose The purpose of this research is to determine what tests can be most useful in quality assurance and control when using fused filament fabrication (FFF) 3D printing machines. The quality of the bond between layers is critical for the structural integrity of the fused filament fabricated parts. Design/methodology/approach Therefore, to determine the influence of process parameters on the quality of parts’ tensile, flexural, notched and un-notched impact, test specimens were fabricated in polylactic acid (PLA) using FFF with different layer thicknesses, fill densities, orientation and print speeds. The mechanical properties were then assessed along with the accuracy and mass of the samples. Findings It is concluded that a notched impact test gives a measure of interlayer bond strength which can be used across build styles to track machine performance, and that this, together with the mass and dimensions of the impact-test specimens, offers an appropriate set of tests capable of tracking the mechanical properties of parts produced using the FFF technique. Originality/value Therefore, this research finding will be of value in benchmarking FFF machines for quality parts fabrications.

Impact of AI regulation on intention to use robots

2019 ◽  
Vol 8 (2) ◽  
pp. 97-114
Author(s):  
Sheshadri Chatterjee
Keyword(s):  
Quality Of Life ◽  
Artificial Intelligence ◽  
Design Methodology ◽  
Regulatory Control ◽  
Control Beliefs ◽  
Intention To Use ◽  
Content Type ◽  
And Control ◽  
The Impact

Purpose The purpose of this paper is to identify the factors influencing the citizens to use robots that would improve the quality of life of the citizens. Design/methodology/approach With the help of different adoption theories and models and with the support of background studies, some hypotheses have been formulated and a conceptual model has been developed with the consideration of the impact of artificial intelligence regulation (IAR) that controls the use of robots as a moderator. The model has been validated and the hypotheses have been tested by statistical analysis with the help of survey works involving consideration of feedbacks from 503 usable respondents. Findings The study reveals that the use of robots by the citizens would appreciably increase if government imposes strict artificial intelligence (AI) regulatory control concerning the use of robots, and in that case, it appears that the use of robots would improve the quality of life of the citizens. Research limitations/implications The duly validated model would help the authority to appropriately nurse and nurture the factors such as ethical dilemma, perceived risks and control beliefs for enhancing the intention of the citizens to use robots for many purposes including domestic usage in the context of appropriate restrictions imposed through AI regulation. Such use of robots would eventually improve the quality of life. Originality/value There are a few studies covering analysis of IAR as a moderator on the linkages of the predictors with the intention of the citizens to use robots. In this context, this study is claimed to have offered a novel contribution.

Supervisor workplace gossip and its impact on employees

2018 ◽  
Vol 33 (1) ◽  
pp. 93-105 ◽  
Author(s):  
Chien-Chih Kuo ◽  
Chih-Ying Wu ◽  
Chia-Wu Lin
Keyword(s):  
Communication Style ◽  
Control Variables ◽  
Content Type ◽  
Member Exchange ◽  
Research Findings ◽  
And Control ◽  
The Impact ◽  
Practical Implications

Purpose The purpose of this paper is to explore the role of supervisor gossip in the workplace. This paper proposes a hypothetical model in which supervisor gossip has an effect on leader-member exchange (LMX), in turn resulting in perceived supervisor ostracism among subordinates. Design/methodology/approach A dyadic research design was applied to collect data from Taiwanese employees. Supervisors participated in a survey containing measures of supervisor gossip and control variables, whereas subordinates responded to a questionnaire on LMX, perceived supervisor ostracism, and control variables. Findings The results indicated that positive supervisor gossip significantly affected LMX. Furthermore, healthy LMX reduced subordinates’ perceptions of supervisor ostracism. Research limitations/implications All participants were recruited in Taiwan, which is a limitation for generalising the research findings. Future studies should investigate multiple societies of various cultural profiles. Practical implications To improve the quality of the supervisor-subordinate relationship, supervisors should adopt a positive informal communication style, and organisations should provide supervisors with information regarding the implications of workplace gossip, illustrating the substantial benefits of positive gossip and the potential drawbacks of negative gossip. Originality/value The present study highlighted the role of supervisor workplace gossip in the field of leadership and empirically investigated the impact of supervisor gossip on subordinates’ reactions.

Corrosion damage evolution of the aircraft aluminum alloy 2024 T3

2016 ◽  
Vol 7 (1) ◽  
pp. 25-46 ◽  
Author(s):  
Spiros Pantelakis ◽  
Dorothea Setsika ◽  
Apostolos Chamos ◽  
Anna Zervaki
Keyword(s):  
Mechanical Properties ◽  
Aluminum Alloy ◽  
Damage Evolution ◽  
Structural Integrity ◽  
Corrosion Damage ◽  
Tensile Tests ◽  
Content Type ◽  
Experimental Database ◽  
Aluminum Alloy 2024 ◽  
The Impact

Purpose – The purpose of this paper is to quantify the corrosion damage evolution that has occurred on the aircraft aluminum alloy 2024 after the exposure to Exfoliation Corrosion Test (EXCO) solution. Moreover, the effect of the evolving corrosion damage on the materials mechanical properties has been assessed. The relevance of the corrosion damage induced by the exposure to the laboratory EXCO for linking it to the damage developed after the exposure of the material on several outdoor corrosive environments or in service is discussed. Design/methodology/approach – To induce corrosion damage the EXCO has been used. For the quantification of corrosion damage the metallographic features considered have been pit depth, diameter, pitting density and pit shape. The effect of the evolving corrosion damage on the materials mechanical properties has been assessed by means of tensile tests on pre corroded specimens. Findings – The results have shown that corrosion damage starts from pitting and evolves to exfoliation, after the development of intergranular corrosion. This evolution is expressed by the increase of the depth of attack, as well as through the significant growth of the diameter of the damaged areas. The results of the tensile tests performed on pre corroded material made an appreciable decrease of the materials tensile properties evident. The decrease of the tensile ductility may become dramatic and increases on severity with increasing corrosion exposure time. SEM fractography revealed a quasi-cleavage zone beneath the depth of corrosion attack. Originality/value – The results underline the impact of corrosion damage on the mechanical behavior of the aluminum alloy 2024 T3 and demonstrate the need for further investigation of the corrosion effect on the structural integrity of the material. This work provides an experimental database concerning the quantification of corrosion damage evolution and the loss of material properties due to corrosion.

Do disclosure and transparency affect bank’s financial performance?

2019 ◽  
Vol 19 (6) ◽  
pp. 1344-1361
Author(s):  
Isaiah Oino
Keyword(s):  
Risk Management ◽  
Corporate Governance ◽  
Financial Performance ◽  
Financial Institutions ◽  
Content Type ◽  
Loan Portfolios ◽  
Cent Level ◽  
Transparency And Disclosure ◽  
The Impact

Purpose The purpose of this paper is to examine the impact of transparency and disclosure on the financial performance of financial institutions. The emphasis is on assessing transparency and disclosure; auditing and compliance; risk management as indicators of corporate governance; and understanding how these parameters affect bank profitability, liquidity and the quality of loan portfolios. Design/methodology/approach A sample of 20 financial institutions was selected, with ten respondents from each, yielding a total sample size of 200. Principal component analysis (PCA), with inbuilt ability to check for composite reliability, was used to obtain composite indices for the corporate governance indicators as well as the indicators of financial performance, based on a set of questions framed for each institution. Findings The analysis demonstrates that greater disclosure and transparency, improved auditing and compliance and better risk management positively affect the financial performance of financial institutions. In terms of significance, the results show that as the level of disclosure and transparency in managerial affairs increases, the performance of financial institutions – as measured in terms of the quality of loan portfolios, liquidity and profitability – increases by 0.3046, with the effect being statistically significant at the 1 per cent level. Furthermore, as the level of auditing and the degree of compliance with banking regulations increases, the financial performance of banks improves by 0.3309. Research limitations/implications This paper did not consider time series because corporate governance does not change periodically. Practical implications This paper demonstrates the importance of disclosure and transparency in managerial affairs because the performance of financial institutions, as measured in terms of loan portfolios, liquidity and profitability, increases by 0.4 when transparency and disclosure improve, with this effect being statistically significant at the 1 per cent level. Originality/value The use of primary data in assessing the impact of corporate governance on financial performance, instead of secondary data, is the primary novelty of this study. Moreover, PCA is used to assess the weight of the various parameters.

scholarly journals Knowledge sharing in open source software communities: motivations and management

2015 ◽  
Vol 19 (4) ◽  
pp. 791-813 ◽  
Author(s):  
Zilia Iskoujina ◽  
Joanne Roberts
Keyword(s):  
Knowledge Sharing ◽  
Open Source ◽  
Open Source Software ◽  
Online Communities ◽  
Descriptive Analysis ◽  
Online Questionnaire ◽  
Content Type ◽  
The Individual ◽  
The Impact

Purpose – This paper aims to add to the understanding of knowledge sharing in online communities through an investigation of the relationship between individual participant’s motivations and management in open source software (OSS) communities. Drawing on a review of literature concerning knowledge sharing in organisations, the factors that motivate participants to share their knowledge in OSS communities, and the management of such communities, it is hypothesised that the quality of management influences the extent to which the motivations of members actually result in knowledge sharing. Design/methodology/approach – To test the hypothesis, quantitative data were collected through an online questionnaire survey of OSS web developers with the aim of gathering respondents’ opinions concerning knowledge sharing, motivations to share knowledge and satisfaction with the management of OSS projects. Factor analysis, descriptive analysis, correlation analysis and regression analysis were used to explore the survey data. Findings – The analysis of the data reveals that the individual participant’s satisfaction with the management of an OSS project is an important factor influencing the extent of their personal contribution to a community. Originality/value – Little attention has been devoted to understanding the impact of management in OSS communities. Focused on OSS developers specialising in web development, the findings of this paper offer an important original contribution to understanding the connections between individual members’ satisfaction with management and their motivations to contribute to an OSS project. The findings reveal that motivations to share knowledge in online communities are influenced by the quality of management. Consequently, the findings suggest that appropriate management can enhance knowledge sharing in OSS projects and online communities, and organisations more generally.

Shareholder risk-taking incentives in the presence of contingent capital

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Mahmoud Fatouh ◽  
Ayowande A. McCunn
Keyword(s):  
Risk Taking ◽  
Banking System ◽  
Capital Requirements ◽  
Content Type ◽  
Basic Model ◽  
Conversion Rates ◽  
A Minor ◽  
The Impact ◽  
Practical Implications

Purpose This paper aims to present a model of shareholders’ willingness to exert effort to reduce the likelihood of bank distress and the implications of the presence of contingent convertible (CoCo) bonds in the liabilities structure of a bank. Design/methodology/approach This study presents a basic model about the moral hazard surrounding shareholders willingness to exert effort that increases the likelihood of a bank’s success. This study uses a one-shot game and so do not capture the effects of repeated interactions. Findings Consistent with the existing literature, this study shows that the direction of the wealth transfer at the conversion of CoCo bonds determines their impact on shareholder risk-taking incentives. This study also finds that “anytime” CoCos (CoCo bonds trigger-able anytime at the discretion of managers) have a minor advantage over regular CoCo bonds, and that quality of capital requirements can reduce the risk-taking incentives of shareholders. Practical implications This study argues that shareholders can also use manager-specific CoCo bonds to reduce the riskiness of the bank activities. The issuance of such bonds can increase the resilience of individual banks and the whole banking system. Regulators can use restrictions on conversion rates and/or requirements on the quality of capital to address the impact of CoCo bonds issuance on risk-taking incentives. Originality/value To model the risk-taking incentives, authors generally modify the asset processes to introduce components that reflect asymmetric information between CoCo holders and shareholders and/or managers. This paper follows a simpler method similar to that of Holmström and Tirole (1998).

Financial battle against climate change – assessing effectiveness using a scorecard

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Candauda Arachchige Saliya ◽  
Suesh Kumar Pandey
Keyword(s):  
Climate Change ◽  
Financial Risk ◽  
Financial System ◽  
Regulatory Agencies ◽  
Theoretical Frameworks ◽  
Content Type ◽  
Banking Regulations ◽  
And Control ◽  
The Impact ◽  
Practical Implications

Purpose This paper aims to investigate how and to what extent the Fijian sustainable banking regulations or guidelines are designed, communicated, implemented and monitored within the financial system in Fiji. A scorecard is introduced for this purpose to assess the effectiveness of Fiji’s financial battle against climate change (FBACC). Design/methodology/approach This study uses a mixed-method methodology. Data were collected mainly from a survey and supplemented by interviews, observations and documents. The scorecard was developed by building on existing two theoretical frameworks, namely, the Sustainable Banking Assessment and Climate Change Governance Index, to make them more appropriate and practically applicable to less developed financial systems in emerging economies such as Fiji. This FBACC scorecard consists of four perspectives, eight critical factors and 24 criteria. Findings The results show that the overall FBACC score averages 40.75%, and all the perspectives scored below 50%, the benchmark. Only the CF “policy” scored 54.25% because of a high positive response of 82.3% for the “political leadership” criterion. The relative contributions of each perspective in constructing the overall score are distributed as 28%, 25%, 24% and 23% among planning, action, accountability and control, respectively. Research limitations/implications These results were complemented by the information shared during the interviews and confirmed that the existing political initiatives need to be effectively communicated and/or implemented in the financial system by the regulatory agencies. Practical implications This FBACC scorecard can be applied to other underdeveloped systems in emerging countries to assess the effectiveness of the sustainable banking regulations and/or guidelines in those countries in relation to the FBACC. It can also be applied to individual firms to assess their contribution to the FBACC. Originality/value To the authors’ best knowledge, this might be the first study in Fiji that considers the impact of climate-related financial risk on the Fijian financial system.

Perbaikan Kualitas Produk Batu Bata Merah Dengan Metode Six Sigma-Dmaic (Studi Kasus Cv. Ghatan Fatahillah Karawang)

UNISTEK ◽  
2021 ◽  
Vol 8 (1) ◽  
pp. 6-10
Author(s):  
Egar Naufal Ari Satya ◽  
Wahyudin Wahyudin
Keyword(s):  
Quality Control ◽  
Customer Satisfaction ◽  
Six Sigma ◽  
Quality Standards ◽  
Research Results ◽  
Machine Performance ◽  
Fishbone Diagram ◽  
And Control ◽  
Dmaic Method

Abstrak. Dunia industri yang semakin berkembang akan mengakibatkan banyaknya persaingan. Perus-ahaan yang dapat bersaing adalah perusahaan yang dapat menjaga  kualitas produknya dengan baik sehingga dapat memenuhi kepuasan konsumen. Maka dari itu diperlukan pengendalian kualitas. Penelitian ini difokuskan pada penurunan cacat pada produk batu bata merah di CV. Ghatan Fatahillah dengan metode Six Sigma-DMAIC (Define, Measure, Analyze, Improve, dan Control). Dari hasil penelitian didapatkan DPMO sebesar 36.212 dengan nilai sigma 3,29. Jenis cacat yang paling sering terjadi pada batu bata merah yaitu pecah/patah yaitu sebesar 4.327 atau 59,81% dari total keseluruhan produk yang cacat.  Hasil dari tahap analyze dengan fishbone diagram, ditetapkan penyebab dari pecah/cacat, yaitu: pekerja kurang paham standar kualitas, tidak adanya pemeriksaan produk, pekerja kurang paham prosedur kerja, kinerja mesin tidak stabil, pekerja kurang teliti,  jumlah penggilingan tidak menentu, dan komposisi batu bata tidak menentu. Maka perlu dilakukan usulan perbaikan agar dapat mengurangi jumlah produk yang cacat pada batu bata merah. Kata kunci: DMAIC, DPMO, Pengendalian Kualitas, Six Sigma Abstract. The growing industrial world will result in a lot of competition. Companies that can compete are companies that can maintain the quality of their products well so that they can meet customer satisfaction. Therefore, quality control is needed. This research is focused on reducing defects in red brick products at CV. Ghatan Fatahillah with the Six Sigma-DMAIC method (Define, Measure, Analyze, Improve, and Control). From the research results obtained DPMO of 36,212 with a sigma value of 3.29. The type of defect that most often occurs in red bricks is broken / broken, which is 4,327 or 59.81% of the total defective products. The results of the Analyze stage with the fishbone diagram showed that the causes of breakage / defects were determined, namely: workers do not understand quality standards, lack of product inspection, workers do not understand work procedures, unstable machine performance, workers are not careful, the number of mills is erratic, and composition erratic bricks. So it is necessary to make improvement proposals in order to reduce the number of defective products in red bricks. Keywords: DMAIC, DPMO, Quality Control, Six Sigma

Impact of embodiment on attitude strength

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Sunaina Shrivastava ◽  
Gaurav Jain ◽  
JaeHwan Kwon ◽  
Dhananjay Nayakankuppam
Keyword(s):  
Undergraduate Students ◽  
Cognitive Process ◽  
Target Object ◽  
Attitude Strength ◽  
Quality Of Information ◽  
Content Type ◽  
Lab Experiments ◽  
Attitude Accessibility ◽  
The Impact

Purpose Traditionally, it has been held that strong attitudes are a result of the conscious cognitive process of elaboration where one engages in effortful issue-relevant thinking. The purpose of this study is to show that attitude strength can follow from processes not just limited to elaboration – as a function of certain embodied states. This study examines bodily manipulations that could alter perceptions about the quality of the information describing a target (e.g. notion of “hard/soft” evidence), and, find that such an embodiment leads one to have strong attitudes toward the target object. This study proposes an attitude-rehearsal-based mechanism to explain the phenomenon. Design/methodology/approach This study have relied on lab experiments as a methodology – undergraduate students and American residents served as participants. This study have conducted a pre-registered study as well. Findings In the work, the study shows that strong attitudes can result from processes not just limited to elaboration, as a function of certain embodied states. This paper examines bodily manipulations that could alter perceptions about the quality of information describing the target (e.g. notion of “hard vs soft”; “converging vs diverging” information), and, find that such an embodiment leads one to have strong attitudes toward the target. This study consistently observed that the bodily manipulations influence attitude accessibility, a direct and operational indicator of attitude strength. This study further validates an attitude-rehearsal-based mechanism to explain the observed phenomenon. Originality/value While much work has investigated the impact of embodiment on attitudes, little attention has been paid to whether, and, how embodied states can impact the “strength” of the attitude without impacting the attitude itself – to the knowledge, this paper is the first to document this. Moreover, traditionally, it has been held that strong attitudes are a result of the conscious cognitive process of elaboration where one engages in effortful issue-relevant thinking. This study however shows that attitude strength can follow from processes not just limited to elaboration – as a function of certain embodied states.

The model of HRM-trust-commitment relationships

2015 ◽  
Vol 115 (8) ◽  
pp. 1457-1480 ◽  
Author(s):  
Dagmara Lewicka ◽  
Katarzyna Krot
Keyword(s):  
Structural Equation ◽  
Affective Commitment ◽  
Content Type ◽  
Calculative Commitment ◽  
Starting Point ◽  
Research Findings ◽  
Organisational Trust ◽  
The Impact ◽  
The Relationship

Purpose – It is worth focusing on the examination of factors influencing the quality of the work environment. The purpose of this paper is to verify the influence of the HRM system and organisational trust on employee commitment. Design/methodology/approach – The survey was conducted in Poland among 370 employees in organisations from two sectors of the economy: services and industry. The verification of the theoretical model was performed based on structural equation modelling. Findings – Research findings made it possible to successfully verify the model of the relationship between the HRM system (practices, process), organisational trust and commitment. The starting point for trust in an organisation followed by commitment is the HRM system. It seems that the impact of the HRM process on creating organisational trust is higher. Research findings have also confirmed a relationship between each type of organisational trust and calculative commitment based on benefits, which is a strong determinant of affective commitment. Organisational trust is, therefore, an intermediary factor because the organisation must build trust in employees first before they become affectively committed. Originality/value – Current studies have not examined the issue of a mutual relationship between three constructs: perceived HRM practices and process, organisational trust and commitment. What is more, previous research was confined to the constructs analysed holistically without considering their complexity (different types of trust and commitment). In addition, the authors attempted to enrich Allen and Mayer’s (1991) model with a new aspect of the commitment – calculative, which is linked to the benefits received by employees. The authors also identified the mediating influence of the trust and calculative commitment onto the affective commitment.

Sign in / Sign up

Export Citation Format

Share Document