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Castellated and cellular beams achieved the same strength as solid I-beams with the same depth, resulting in significantly lighter and more economical structures. The purpose of this study is to analyse the bending behaviour of I-beam steel sections with certain web openings by finite element analysis.

The accuracy of finite element results allows extensive numerical analysis of sections with web openings, concentrating on the web opening sizes and web opening positions. These assumptions can increase the induced section load with various shapes of web opening depth and web opening shapes of c-hexagon, hexagon, octagon, circular and square. This also includes spacing distances, with a 50-mm edge and 150-mm centre-to-centre distance and a section with a 100-mm edge and 200-mm centre-to-centre distance. Generally, the adjustment of the opening geometry (by reducing the angle of web pitch or reducing the opening depth depending on analysed parameters) may influence the bending behaviour.

Additionally, Model 2 was found to be the optimum model compared to Model 1, mainly in terms of bending. Moreover, the I-beam with a c-hexagon shape opening exhibited the lowest displacement compared to other sections with other web opening shapes. Section with a different arrangement of web opening, Type E shows the lower displacement while higher displacement is observed for Type A and also higher displacement considered for Type G. The optimum model is associated with Type E, followed by Type D, compared to other types of certain web opening and I-beam.

The use of sections with different arrangements of web opening improved the performance of the perforated section in terms of structural behaviour, compared to typical I-beam, thus leading to economic design.

While previous research in career studies has highlighted the positive impact of several leadership behaviors on followers’ work and career success, less is known about how the emergent topic of inclusive leadership shapes followers’ task performance. Using an inclusive leadership approach and job demands-resources theory, we developed a novel sequential mediation model in which inclusive leadership indirectly facilitates followers’ performance through self-initiating behavior and work motivation. Specifically, we aimed to investigate whether inclusive leaders encourage followers to show enhanced task performance through strengths use and work engagement.

A representative sample of 278 Dutch employees from diverse organizations was surveyed at three different time points.

The results of structural equation modeling evidenced that inclusive leadership was indirectly related to follower task performance, initially through the utilization of strengths and subsequently through work engagement over time. When leaders exhibited behaviors that were inclusive in nature, they encouraged their followers to make use of their strengths at work. Such leadership actions boosted the work engagement of their followers and led to enhanced task performance.

We develop and test a novel sequential mediation model that explores how inclusive leadership fosters improved task performance among followers by promoting the utilization of strengths and subsequent work engagement. This sheds light on the mechanisms through which inclusive leadership contributes to follower performance, a crucial indicator in shaping sustainable career trajectories.

This paper aims to apply the novel numerical model to analyze the effect of pillar material on the response of compound quartz crystal resonator (QCR) with an array of pillars. The performance of the proposed device compared to conventional QCR method was also investigated.

A finite element method model was developed to analyze the behavior of QCR coupled with an array of pillars. The model was composed of an elastic pillar, a solution and a perfectly matched layer. The validation of the model was performed through a comparison between its predictions and previous experimental measurements. Notably, a good agreement was observed between the predicted results and the experimental data.

The effect of pillar Young’s modulus on the coupled QCR and pillars with a diameter of 20 µm, a center-to-center spacing of 40 µm and a density of 2,500 kg/m³ was investigated. The results indicate that multiple vibration modes can be obtained based on Young’s modulus. Notably, in the case of the QCR–pillar in air, the second vibration mode occurred at a critical Young’s modulus of 0.2 MPa, whereas the first mode was observed at 3.75 Mpa. The vibration phase analysis revealed phase-veering behavior at the critical Young’s modulus, which resulted in a sudden jump-and-drop frequency shift. In addition, the results show that the critical Young’s modulus is dependent on the surrounding environment of the pillar. For instance, the critical Young’s modulus for the first mode of the pillar is approximately 3.75 Mpa in air, whereas it increases to 6.5 Mpa in water.

It was concluded that the performance of coupled QCR–pillar devices significantly depends on the pillar material. Therefore, choosing pillar material at critical Young’s modulus can lead to the maximum frequency shift of coupled QCR–pillar devices. The model developed in this work helps the researchers design pillars to achieve maximum frequency shift in their measurements using coupled QCR–pillar.

This study aims to investigate how work overload, resulting from full-time telecommuting, aggravates telecommuting accounting professionals’ burnout via the mediation of work exhaustion. Further, the study also tests the conditional moderation effect of psychological capital on the association between work exhaustion and burnout, proposing that it becomes least severe for employees who perceive a high level of psychological capital.

The research was conducted using a sample of 322 employees from Big Four accounting firms, and the measurement model was established using confirmatory factor analysis. Hypotheses were tested using structural equation modeling and model-14 in the PROCESS Macro for SPSS.

The results confirmed that work overload directly and indirectly (via the mediation of work exhaustion) aggravates employees’ burnout. However, psychological capital negatively conditions the mediating effect of work exhaustion on burnout such that the aggravating effect of work overload on burnout, via the mediation of work exhaustion, gets least severe (insignificant) for those employees who perceive a high level of psychological capital.

The study contributes to the literature on work overload-induced “work exhaustion burnout” association and offers suggestions for implications.

This study aims to validate the linear flow theory with computational fluid dynamics (CFD) simulations and to propose a novel shape for the airfoil that will improve supersonic aerodynamic performance compared to the National Advisory Committee for Aeronautics (NACA) 64a210 airfoil.

To design the new airfoil shape, this study uses a convex optimization approach to obtain a global optimal shape for an airfoil. First, modeling is conducted using linear flow theory, and then numerical verification is done by CFD simulations using ANSYS Fluent. The optimization process ensures that the new airfoil maintains the same cross-sectional area and thickness as the NACA 64a210 airfoil. This study found that an efficient way to obtain the ideal airfoil shape is by using linear flow theory, and the numerical simulations supported the assumptions inherent in the linear flow theory.

This study’s findings show notable improvements (from 4% to 200%) in the aerodynamic performance of the airfoil, especially in the supersonic range, which points to the suggested airfoil as a potential option for several fighter aircraft. Under various supersonic conditions, the optimized airfoil exhibits improved lift-over-drag ratios, leading to improved flight performance and lower fuel consumption.

This study was conducted mainly for supersonic flow, whereas the subsonic flow is tested for a Mach number of 0.7. This study would be extended for both subsonic and supersonic flights.

Convex optimization and linear flow theory are combined in this work to create an airfoil that performs better in supersonic conditions than the NACA 64a210. By closely matching the CFD results, the linear flow theory's robustness is confirmed. This means that the initial design phase no longer requires extensive CFD simulations, and the linear flow theory can be used quickly and efficiently to obtain optimal airfoil shapes.

The proposed airfoil can be used in different fighter aircraft to enhance performance and reduce fuel consumption. Thus, lower carbon emission is expected.

The unique aspect of this work is how convex optimization and linear flow theory were combined to create an airfoil that performs better in supersonic conditions than the NACA 64a210. Comprehensive CFD simulations were used for validation, highlighting the optimization approach's strength and usefulness in aerospace engineering.

This study investigates how organizational control systems induce emotional labor in frontline service employees (FLEs). Drawing on the stimulus–organism–response (S-O-R) theory, we hypothesized that two control systems, an outcome-based control system (OBCS) and a behavior-based control system (BBCS), trigger work engagement rather than organizational dehumanization in FLEs, leading them to choose deep acting rather than surface acting as an emotional labor strategy.

This study employed three-wave online surveys conducted 3–4 months apart to assess the time-lagged effects of S-O-R. We measured OBCS, BBCS (stimuli) and control variables at Time 1 (T1); work engagement and organizational dehumanization (organisms) at Time 2 (T2) and emotional labor strategies (responses) at Time 3 (T3). A total of 218 employees completed the T1, T2 and T3 surveys.

OBCS increased work engagement, leading to increased deep acting. BBCS enhanced organizational dehumanization, leading to increased surface acting. Post-hoc analysis confirmed that the indirect effect of OBCS on deep acting through work engagement and the mediation effect of BBCS on surface acting through organizational dehumanization were statistically significant.

This study collected three-wave data to reveal how organizational control systems affect FLEs’ emotional labor in the S-O-R framework. It illustrated how organizations induce FLEs to perform effective emotional strategies by investigating the effects of organizational control systems on their internal states.

This study aims to investigate the causes of leakage in radial oil seals under dynamic eccentricity, elucidate the influence of operating parameters on leakage failure and develop methods for predicting and preventing such leakage.

Based on the principle of cam motion and considering viscoelasticity, develops a motion model of the compression and release of the shaft seal and proposes a method to determine its failure. In addition, this study quantifies the leakage gap and formulates a quantitative calculation model to accurately determine the location and shape parameters of the leakage gap.

Leakage gaps predominantly occur during the release phase of the shaft seal. Their presence can be identified by comparing the descending times of the seal and the shaft during this phase. An increase in rotation speed and eccentricity heightens the likelihood of gap formation, with both the dimensions and leakage rate of the gap increasing as these factors escalate. Eccentricity, in particular, has a more pronounced effect on gap formation.

This study clarifies the failure mechanisms of radial oil seals under dynamic eccentricity and introduces a criterion for identifying leakage gaps, providing valuable theoretical guidance for the design and optimization of radial oil seals.

The peer review history for this article is available at: https://publons.com/publon/10.1108/ILT-05-2024-0192/.

To understand how Indian first-time mothers in STEM (Science, Technology, Engineering and Math) organisations returning to work cope with the perceived ideological psychological contract breaches from a work–home resources perspective.

This paper utilises interpretative phenomenological analysis (IPA) within the work–home resources (W-HR) model to analyse returning first-time mothers' lived experiences.

This study shows that significant life/work events such as childbirth/lack of career growth can trigger resource depletion at work and home and materialise in first-time mothers perceiving ideological psychological contract breaches at work. It has also been observed that key resource usage and macro support structures aid employees in attenuating work–home conflict by balancing contextual demands and personal resources. This study's participant accounts reveal that the recovery of volatile resources was possible by psychologically detaching and being silent.

The study offers a distinctive perspective by investigating the ideological PC breach experienced by first-time Indian mothers upon their organisational re-entry from a work–home resource model lens. Situated in a unique socio-cultural space and bringing forth the rich lived experiences of women working in the Indian STEM field, this paper explores how key resources shape the coping responses of first-time mothers in this context.

This paper aims to explore how digital capability incompatibility affects knowledge cooperation performance through the mediating effect of digital resilient agility and the moderating effect of project complexity in project network organizations (PNOs).

A cross-sectional questionnaire survey was conducted with 207 middle and senior managers in PNOs. Based on validated questionnaire items and construct definitions, a dynamic panel regression was performed using 292 project-focused firms’ annual reports.

The results show that digital capability incompatibility facilitates knowledge cooperation performance by enhancing digital resilient agility in PNOs. Increased project complexity strengthens this relationship, promoting better knowledge cooperation performance.

Managers can use partner firms’ diverse digital knowledge to quickly develop technologies and tackle digital transformation challenges, thereby improving knowledge cooperation. They can also evaluate the project environment to manage digitally-supported cooperation effectively.

This research reveals how firms in PNOs transform digital capability incompatibility into knowledge cooperation performance through digital transformation efforts. This research extends the boundary of this relationship to project-level factors and proposes digital resilient agility as a digital transformation effort for knowledge cooperation in PNOs than previous research.

Library quality assurance systems are collaborative governances that facilitate the presentation of data on international accreditation of departments, which contains data on services, human resources, library facilities and infrastructure. This research analyzes the supporting and inhibiting factors and the advantages of the library quality assurance system in supporting international accreditation of departments at Sebelas Maret University (UNS) Surakarta, Indonesia using Talcott Persons' theory of structural functionalism.

Primary data in exploratory research and action research obtained from the Quality Assurance Team at the university level under the Educational Quality Assurance and Development Institute (LPPMP), the Quality Assurance Unit (UPM) at the faculty level and the Quality Control Group (GKM) at the department, librarian and academic community levels. Supporting informants are international assessor practitioners. Data validation using source triangulation, namely information obtained through different sources, and method triangulation through different methods. Data obtained from library studies, observations, Focus Group Discussions (FGD), documentation and interviews with staff, library leaders, lecturers from departments that have and will carry out international accreditation and UNS students and analyzed interactive analysis models, namely data reduction, data presentation and concluding.

The research results show that the UNS Library quality assurance system facilitates higher education organizations, such as bachelor's, master's and doctoral departments at UNS; search and presentation of international accreditation data. Supporting factors include the availability of digital library systems, online catalogs (UNSLA), e-journal and e-book databases, library websites and library data links for accreditation; facilities and infrastructure consist of indoor-outdoor study rooms; library social media; Self Access Terminal room; facilities for international students; involvement of librarians in international internships/conferences, librarians who have had competency tests and certification; librarians pursuing doctoral degree and support for student interns in system development. Inhibiting factors include the unavailability of programmers and dependence on UNS Information and Communication of Technology Unit. The benefits of the department quality assurance system include accelerating and improving the organization's quality and presentation of international accreditation data for departments at UNS.

This type of qualitative research with an exploratory approach takes library study data, observations and in-depth interviews with library staff and quality assurance of departments. The informants were selected using purposive sampling, which was adjusted to the needs and interests of the research. It also uses the action research method, a collaboration between the quality assurance unit, librarians and academics. Action research is a form of collective self-reflection that involves a series of daily activities, which include the processes of research, diagnosis, planning, implementation, monitoring and establishing the necessary relationships between evaluation and self-development. The research object is something that will be subject to conclusions resulting from something that will be discussed in the research. The object of this research is the quality assurance of the UNS Library. Primary data was obtained from the Quality Assurance Team at the university level under the LPPMP, the Quality Assurance Unit (UPM) at the faculty level and the Quality Control Group (GKM) at the department, librarian and academic community levels. Supporting informants are international assessor practitioners. Data will be collected using observation, in-depth interviews, Focus Group Discussion (FGD) and documentation. To ensure the validity of the data, source triangulation is used, namely, information obtained through different sources, as well as method triangulation through different methods, for example, interviews with observation or FGD. Data analysis using an interactive analysis model, namely data reduction, data presentation and concluding. This research was conducted at the UNS Library, with the research object being all departments at Sebelas Maret University, which have and will undergo international accreditation.