Welder learning curves behaviour: “focus on welding productivity with the TIG process of marine platforms stainless steel pipes”

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Bruno Sobral Macedo ◽  
Miguel Luiz Ribeiro Ferreira
Keyword(s):  
Stainless Steel ◽  
Learning Curves ◽  
Superior Performance ◽  
Content Type ◽  
Average Productivity ◽  
Productivity Data ◽  
Asme Code ◽  
The Impact ◽  
Welding Productivity

PurposeThe purpose of the study is to analyse the feasibility of using the potential and exponential curve models to assess the learning of a group of welders, when welding stainless steel piping with the tungsten inert gas process.Design/methodology/approachThe welding productivity data grouped according to the requirements of the ASME SECTION IX code is organised into two groups: average productivity and baseline productivity. When processing the adjustment to the two models, the Excel software Solver tool was used. The criteria for assessing the quality of the fit were: least squared method, Spearman's correlation coefficient and graphical method. The impact of the variation coefficient on the average productivity and the amplitude (difference between the minimum and maximum productivity) was also evaluated on the baseline productivity.FindingsThe curves elaborated based on the average productivity presented better quality of adjustment than those constructed from the baseline productivity. The potential and exponential models presented similar adjustment conditions, with the second having a slightly superior performance. There were no productivity gains due to learning in the studied time interval. The grouping of the average daily productivity data based on the diameter range established in the ASME code section IX presented satisfactory results, enabling its use by the industry.Originality/valueThere is no news of work on piping welding with this focus. The proposal to group the productivity data according to the degree of difficulty of execution established by the ASME code section IX, widely used in the industry, is a significant contribution to monitoring the evolution of learning. In the same way, the results allow to adopt the average productivity determined from the first 20 days of realisation of a project, as a reasonable indicator to estimate the future performance of the work, helping to correct deadlines during the realisation of a project.

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).

The prediction of the cyclic mechanical behavior of stainless steel 304L at room temperature

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Hala Messai ◽  
Salim Meziani ◽  
Athmane Fouathia
Keyword(s):  
Stainless Steel ◽  
Design Methodology ◽  
Room Temperature ◽  
Type Model ◽  
Good Prediction ◽  
304L Stainless Steel ◽  
Content Type ◽  
The Third ◽  
Chaboche Model

Purpose The purpose of this paper is to highlight the performance of the Chaboche model in relation to the database identification, tests with imposed deformations were conducted at room temperature on 304L stainless steel specimens. Design/methodology/approach The first two tests were performed in tension-compression between ±0.005 and ±0.01; in the third test, each cycle is composed of the combination of a compression tensile cycle between ±0.01 followed by a torsion cycle between ±0.01723 (non-proportional path), and the last, uniaxial ratcheting test with a mean stress between 250 MPa and −150 MPa. Several identifications of a Chaboche-type model were then performed by considering databases composed of one or more of the cited tests. On the basis of these identifications, the simulations of a large number of ratchet tests in particular were carried out. Findings The results present the effect of the optimized parameters on the prediction of the behavior of materials which is reported in the graphs, Optimizations 1 and 2 of first and second tests and Optimization 4 of the third test giving a good prediction of the increasing/decreasing pre-deformation amplitude. Originality/value The quality of the model's predictions strongly depends on the richness of the database used for the identification of the parameters.

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.

scholarly journals An Adaptive Bitrate Switching Algorithm for Speech Applications in Context of WebRTC

2021 ◽  
Vol 17 (4) ◽  
pp. 1-21
Author(s):  
Mohannad Alahmadi ◽  
Peter Pocta ◽  
Hugh Melvin
Keyword(s):  
Real Time ◽  
Data Exchange ◽  
Quality Of Experience ◽  
End User ◽  
High Quality ◽  
Content Type ◽  
Switching Algorithm ◽  
Wide Range ◽  
The Impact

Web Real-Time Communication (WebRTC) combines a set of standards and technologies to enable high-quality audio, video, and auxiliary data exchange in web browsers and mobile applications. It enables peer-to-peer multimedia sessions over IP networks without the need for additional plugins. The Opus codec, which is deployed as the default audio codec for speech and music streaming in WebRTC, supports a wide range of bitrates. This range of bitrates covers narrowband, wideband, and super-wideband up to fullband bandwidths. Users of IP-based telephony always demand high-quality audio. In addition to users’ expectation, their emotional state, content type, and many other psychological factors; network quality of service; and distortions introduced at the end terminals could determine their quality of experience. To measure the quality experienced by the end user for voice transmission service, the E-model standardized in the ITU-T Rec. G.107 (a narrowband version), ITU-T Rec. G.107.1 (a wideband version), and the most recent ITU-T Rec. G.107.2 extension for the super-wideband E-model can be used. In this work, we present a quality of experience model built on the E-model to measure the impact of coding and packet loss to assess the quality perceived by the end user in WebRTC speech applications. Based on the computed Mean Opinion Score, a real-time adaptive codec parameter switching mechanism is used to switch to the most optimum codec bitrate under the present network conditions. We present the evaluation results to show the effectiveness of the proposed approach when compared with the default codec configuration in WebRTC.

scholarly journals Antecedents of organizational identification: implications for employee performance

2022 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Syeda Wajiha Kazmi ◽  
Syeda Tuba Javaid
Keyword(s):  
Employee Engagement ◽  
Organizational Identification ◽  
Employee Performance ◽  
Quality Of Education ◽  
Content Type ◽  
Perceived Supervisor Support ◽  
The University ◽  
The Impact ◽  
The Relationship

Purpose This study aims to investigate the impact of three determinants of organizational identification (OID) on employee performance (EP) in the context of private business institutions. Design/methodology/approach A sample of 175 permanent faculty members from four top universities in Karachi, Pakistan, was interviewed using a five-point Likert scale questionnaire. The data were inserted in SPSS 22 and SmartPLS v 3.2 for performing the analysis. Findings Results of the study showed a significant effect in perceived supervisor support on OID; OID; job satisfaction and EP; and mediating relationship. Conversely, an insignificant effect was observed in workplace incivility. Research limitations/implications It is highly recommended that organizations work on the areas that lead to enhancing their employees’ performance. Also, human resource should create a healthy culture that promotes initiatives, open-door policies and discourages power distance. Lastly, one of the key responsibilities of management is to strengthen their OID because employees are more likely to identify with their supervisors if they invest in the organizations they work for. Practical implications This study will help strengthen the relationship between supervisors and university employees. It will guide the supervisors to acknowledge and appreciate the efforts of their subordinates and develop recreational policies and employee engagement activities. In addition, it will help develop a conducive environment and enhance the quality of education in the university and the society. Originality/value Understanding the determinants of OID on EP in the educational context is very important as it enhances the quality of EP and the overall quality of education of the institution.

Perceptions of nurses on the impact of accreditation on quality of care

2014 ◽  
Vol 19 (2) ◽  
pp. 69-82 ◽  
Author(s):  
Ahmet Yildiz ◽  
Sidika Kaya
Keyword(s):  
Regression Analysis ◽  
Patient Satisfaction ◽  
Quality Of Care ◽  
Positive Impact ◽  
Pearson Correlation ◽  
High Rate ◽  
Content Type ◽  
Independent Variables ◽  
The Impact

Purpose – This article aims to investigate perceptions of Turkish nurses on the impact of accreditation on quality of care and the effect of accreditation on quality results. Design/methodology/approach – This study was performed as a cross-sectional, questionnaire-based survey on 258 nurses who started working in the hospital before it was accredited and continued to work during and after accrediation and who therefore knew both the hospital's pre-accrediation and post-accreditation periods. In this study, descriptive statistical analyses (means and standard deviations) were carried out to explore the views of the participants on “quality results,” “benefits of accreditation” and “participation of employees.” “Quality results” was considered to be the dependent variable, while “benefits of accreditation” and “participation of employees” were accepted as the independent variables. The relationship between the dependent variable and the independent variables was tested using Pearson correlation and multiple regression analysis. External patient satisfaction data collected by the quality department of the hospital before and after accreditation were also investigated. Findings – It was found that nurses had generally high scores for the items concerning the benefits of accreditation. There was a statistically significant positive correlation between the dependent variable (quality results) and the independent variables (benefits of accreditation and participation of employees). Regression analysis indicated that R2=0.461 and the extent to which the independent variables explained the dependent variable was 46.1 per cent, which is a high rate. Patient satisfaction scores increased after accreditation. Practical implications – Our study suggest that providing support for nurses, especially nurses with administrative responsibilities and incorporating employees into the process are important for exercising quality standards. Originality/value – Hospital accreditation has a positive impact on quality results especially on quality of care provided to patients and patient satisfaction. Study findings could guide policy makers and hospital managers in Turkey and in other countries who are preparing or implementing accreditation.

The influence of the structure of employees on sensory quality of restaurants' food

2014 ◽  
Vol 116 (3) ◽  
pp. 527-543 ◽  
Author(s):  
Dragan Tešanovic ◽  
Milovan Krasavcic ◽  
Bojana Miro Kalenjuk ◽  
Milijanko Portic ◽  
Snježana Gagic
Keyword(s):  
Sensory Quality ◽  
Second Phase ◽  
Content Type ◽  
Level Of Education ◽  
Third Phase ◽  
Practical Evaluation ◽  
Quality Of Food ◽  
The Impact ◽  
Practical Implications

Purpose – The aim of this paper is to determine the sensory quality of food in restaurants by professional food evaluators and to research the impact of education, age and number of employees on the quality of food. Design/methodology/approach – In the first phase five trained food tasters evaluated the sensory quality of food. In the second phase, the analysis of the structure of employees was done by establishing their level of education, age and number of employees. In the third phase the regression and correlation analysis was done with the aim to establish the impact of the level of education, age and number of employees on the sensory quality of food. Findings – The sensory evaluation has shown that the evaluated food is of moderate quality. Correlation matrix has shown that the education level of employees has a high impact on the sensory quality of food. There is a correlation between the number of employees, their age and their education. Practical implications – Obtained results are the indicators of the quality of food in restaurants in the region and they can serve for the improvement of quality. They have shown that education and staff training can contribute to a better quality of food. Established methodology can also contribute to the practical evaluation of quality. Originality/value – This paper is reflected on the specific application of methodology of the sensory analysis of food in restaurants. The paper pointed to the impact of employees on the sensory quality of food by statistical methods. Statistical results which point to the great impact of the level of education of employees on the sensory quality of food in restaurants are particularly valuable.

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