Dirk Schnubel, Manfred Horstmann and Norbert Huber
While normally the formation of thermally induced residual stresses is seen mainly as detrimental side effect from production processes like welding or casting, the well-directed…
Abstract
Purpose
While normally the formation of thermally induced residual stresses is seen mainly as detrimental side effect from production processes like welding or casting, the well-directed introduction of thermal residual stresses can also be used as tool to retard fatigue crack growth (FCG). In the presented paper, the use of a defocused laser to modify the residual stress state, and by that to retard the FCG, is examined. The focus lies on the simulation-based optimisation of the heating line position for achieving a maximum fatigue life. The paper aims to discuss these issues.
Design/methodology/approach
In the presented work, the developed prediction methodology for the FCG coupling process simulation and subsequent fracture mechanics analysis is used to identify the optimum positioning of either one or two heating lines on a C(T)100 specimen that leads to a maximised total lifetime. Afterwards, the prediction results are validated experimentally for selected cases.
Findings
The predictions match the experiments within the experimental scatter indicating the correct identification of the optimum heating line positions. This demonstrates the large potential for reducing the experimental effort needed for design optimisation using the proposed strategy.
Originality/value
The used methodology of coupling of welding simulation with subsequent fracture mechanics analysis in order to optimise the FCG behaviour of structures is innovative and only very few published studies addressed parts of similar approaches.
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Zinc coatings are applied commercially by hot‐dipping, electro‐deposition, metal‐spraying, cementation and vacuum deposition (see Table 5). Galvanizing (zinc hot‐dipping) has been…
Abstract
Zinc coatings are applied commercially by hot‐dipping, electro‐deposition, metal‐spraying, cementation and vacuum deposition (see Table 5). Galvanizing (zinc hot‐dipping) has been done for more than 200 years now and is undoubtedly the most widely‐used form of metal coating. The production and pro‐perties of these coatings have received intensive study over the last 10 years; much of this has been reported at the ‘International Conferences on Hot‐Dip Galvanizing’.
Miriam Arnold and Thomas Rigotti
Health-oriented leadership (HoL) encompasses leaders' health behaviors and attitudes toward their followers (StaffCare) and themselves (SelfCare), and there is ample evidence of…
Abstract
Purpose
Health-oriented leadership (HoL) encompasses leaders' health behaviors and attitudes toward their followers (StaffCare) and themselves (SelfCare), and there is ample evidence of its positive effects on employee well-being. However, research on the antecedents of StaffCare is still in its infancy and does not account for within-person variability. Therefore, the authors adopt a leader-centered perspective and propose a serial mediation model that links leaders' intrapersonal fluctuations in job resources and demands to StaffCare, mediated by leaders' SelfCare, work engagement and emotional exhaustion.
Design/methodology/approach
Over five working weeks, 234 school principals responded to a weekly questionnaire, resulting in a total of 956 responses. Multilevel structural equation models were used for analysis.
Findings
The data supported SelfCare as a mechanism in leaders' motivational and health-impairment processes. The proposed serial mediation of the relationship between job resources and StaffCare via leader SelfCare and work engagement was also supported.
Practical implications
The study can guide job redesign for leaders by highlighting the role of job resources. Investing in interventions aimed at the SelfCare of leaders is likely to have a positive impact on their leadership.
Originality/value
These findings suggest that job characteristics and the leader's well-being shape leader cognitions and behaviors. Therefore, the authors suggest integrating the HoL model into the job demands–resources (JD-R) model for leaders.
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Antonia J. Kaluza and Nina M. Junker
Health-oriented leadership is an emerging concept that is promising for better understanding how leaders can support employee well-being. However, there is uncertainty about the…
Abstract
Purpose
Health-oriented leadership is an emerging concept that is promising for better understanding how leaders can support employee well-being. However, there is uncertainty about the process through which health-oriented leadership relates to employee well-being. Advancing health-oriented leadership research, this study aims to examine employee self-care and the perceived team health climate as mediating mechanisms.
Design/methodology/approach
The authors conducted a time-lagged study with three measurement points (NT1 = 335, NT2 = 134, NT2 = 113) to test these mechanisms.
Findings
The results show that health-oriented leadership at Time 1 positively relates to employee self-care and perceived team health climate at Time 2, which, in turn, are negatively associated with employee exhaustion at Time 3.
Originality/value
The indirect associations suggest that health-oriented leadership relates to employee well-being via the perceived team health climate and the individuals' self-care. By revealing an important mediating mechanism, this study contributes to the health-oriented leadership literature and can help organizations and leaders improve health promotion in organizations.
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N.E. Cook, W.L. Hall, W.R. Thompson, J. Landeau, H. Wiester, D. Horstmann and A. Gordet
The hot dip galvanising process is a well‐established means of rust‐proofing iron and steel. In Western Europe 78,000 tons of zinc are used every year for galvanising sheet and…
Abstract
The hot dip galvanising process is a well‐established means of rust‐proofing iron and steel. In Western Europe 78,000 tons of zinc are used every year for galvanising sheet and strip. In the U.S.A., where galvanised sheet is widely used, the figure is 132,000 tons p.a. Galvanisers on both sides of the Atlantic can learn much from each other and last month about 200 experts from Britain, the Continent and America met at Oxford for an International Conference on Hot Dip Galvanising under the auspices of the Zinc Development Association. The subjects discussed ranged from the galvanising of wire to an incentive wages scheme for galvanising workers. Here are summaries of some outstanding papers.
Lucija Rojko, Andreja Kvas and Janez Stare
Effective leadership in public health organisations is essential for achieving positive outcomes and ensuring the quality of healthcare services. This review aimed to identify the…
Abstract
Purpose
Effective leadership in public health organisations is essential for achieving positive outcomes and ensuring the quality of healthcare services. This review aimed to identify the competencies that nurse leaders of organisations working in the field of public health need to perform their tasks effectively.
Design/methodology/approach
A descriptive method with a scoping review was used, searching the PubMed, ScienceDirect, and CINAHL databases. A total of 16 references were suitable for the final analysis. A summative literature analysis was conducted, identifying leadership competencies (N = 69) across various sources. The identified competencies were analysed by qualitative approach.
Findings
Competencies were categorised in 11 groups: Identifying Needs and Continuous Improvement; Strategic Planning in Line with Vision and Mission; Ensuring Professional Development; Maintaining Motivation; Delegating and Managing Tasks; Communication Skills; Building and Maintaining Relationships with Decision Makers; Problem Solving and Conflict Management; Tracking Professional Trends and Using Accurate Information; Resource Management and Human Resource Management; Organising Work.
Originality/value
The 11 groups of leadership competencies for nurses in public health organisations provide a content direction for educational activities aimed at nurse leaders and summarise the most important competencies required for effective leadership in public health organisations. Competent leadership is vital for the success and effectiveness of public health organisations in delivering quality healthcare services and addressing the evolving healthcare needs. Further research within specific field in public health is recommended to identify additional, field-specific competencies essential for effective leadership in diverse organisational settings.
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Zinc coatings to combat corrosion in a wide range of structural steelwork and general metalwork are specified in the Greater London Council's (G.L.C.) Preambles to Bills of…
Abstract
Zinc coatings to combat corrosion in a wide range of structural steelwork and general metalwork are specified in the Greater London Council's (G.L.C.) Preambles to Bills of Quantities. Typical applications are on dustbins, children's playground equipment, structural sections and building components. Hot dip galvanising is generally preferred for protecting structural steel and ferrous metalwork in aggressive conditions or inaccessible places. The galvanised metal must comply with BS 729: 1971; after fabrication it is coated in one operation by complete immersion in the zinc bath and all excess is removed. The finished surface should be clean and uniform. Zinc coatings to BS 2989: 1982 are used for interior applications where it is normally dry. Zinc spray to BS 2569: Part 1: 1964 is specified where the size of members prohibits hot dip galvanising. Zinc coatings may be covered with paint or plastic coatings to provide additional protection and improve appearance. Designers are advised to consult BS 5493: 1977 or DD 24: 1973 for guidance on how to specify protective systems.
Kinh Nguyen, Tharam S. Dillon and Erik Danielsen
This article proposes the concept of web clientserver event together with its associated taxonomy which yields a formal specification for such an event. The concept, in…
Abstract
This article proposes the concept of web clientserver event together with its associated taxonomy which yields a formal specification for such an event. The concept, in conjunction with the concept of atomic use case (reviewed in the article), is then used as a key element for a model‐driven approach to web information system development. The outcome is a new method for web information systems development that reduces the complex web‐based hypermedia navigation behaviour to a much simpler event‐driven behaviour. On the strength of that realized simplicity, the method provides (i) a set of platform‐independent models that completely characterizes the application, and (ii) a well‐defined process to map the combined model to any chosen platform‐dependent implementation.
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Corrosion is one of the chief factors contributing to the wear of the cylinders and piston rings of an automotive engine. It is caused by acids formed in the combustion process…
Abstract
Corrosion is one of the chief factors contributing to the wear of the cylinders and piston rings of an automotive engine. It is caused by acids formed in the combustion process, particularly those resulting from the combination of certain gases with water condensed on the cylinder walls in low‐temperature operation. In this article the author discusses the mechanism of corrosive cylinder wear, together with the factors influencing it, and reviews some of the methods of mitigating the attack.
Zhiwei Li, Dingding Li, Yulong Zhou, Haoping Peng, Aijun Xie and Jianhua Wang
This paper aims to contribute to the performance improvement and the broader application of hot-dip galvanized coating.
Abstract
Purpose
This paper aims to contribute to the performance improvement and the broader application of hot-dip galvanized coating.
Design/methodology/approach
First, the ability to provide barrier protection, galvanic protection, and corrosion product protection provided by hot-dip galvanized coating is introduced. Then, according to the varying Fe content, the growth process of each sublayer within the hot-dip galvanized coating, as well as their respective microstructures and physical properties, is presented. Finally, the electrochemical corrosion behaviors of the different sublayers are analyzed.
Findings
The hot-dip galvanized coating is composed of η-Zn sublayer, ζ-FeZn13 sublayer, δ-FeZn10 sublayer, and Γ-Fe3Zn10 sublayer. Among these sublayers, with the increase in Fe content, the corrosion potential moves in a noble direction.
Research limitations/implications
There is a lack of research on the corrosion behavior of each sublayer of hot-dip galvanized coating in different electrolytes.
Practical implications
It provides theoretical guidance for the microstructure control and performance improvement of hot-dip galvanized coatings.
Originality/value
The formation mechanism, coating properties, and corrosion behavior of different sublayers in hot-dip galvanized coating are expounded, which offers novel insights and directions for future research.