Search results

This study aims to optimize the preparation conditions and modify the nanofiltration (NF) membranes to prepare high-performance polysulfone/sulfonated polysulfone composite nanofiltration (PSF/SPSF-NF) membranes through interfacial polymerization.

Investigating the impacts of anhydrous piperazine (PIP) concentration, trimesoyl chloride (TMC) concentration and basement membrane type on NF membrane performance, the optimal membrane was prepared. In addition, nano-SiO₂ was added to the active separation layer to modify the NF membranes.

The comprehensive performance of PSF/SPSF-NF membranes was optimized when the concentration of PIP was 0.75 Wt.% and the concentration of TMC was 0.15 Wt.%, at which time the water flux was 66.1 L·m⁻²·h⁻¹ and the retention rate of Na₂SO₄ was 98.1%. The comprehensive performance of polysulfone/sulfonated polysulfone-SiO₂ nanofiltration (PSF/SPSF-SiO₂-NF) membranes was optimized when the blending ratio of nano-SiO₂ to PIP was 2:3, with a pure water flux of 81.9 L·m⁻²·h⁻¹ and a Na₂SO₄ retention rate of 95.9%. Compared to polysulfone nanofiltration (PSF-NF) membranes and PSF/SPSF-NF membranes, NF membranes with nano-SiO₂ increased the flux recovery rate by 22.9% and 8.7%.

PSF/SPSF-SiO2-NF membrane exhibits excellent antifouling properties.

There is currently no literature available on the preparation of NF membranes using polysulfone/sulfonated polysulfone (PSF/SPFS) as a substrate. This provides a method for modifying NF membranes, starting with the modification of the basement membrane and then modifying the active separation layer.

This paper aims to improve the permeability and antifouling of polysulfone (PSF) ultrafiltration membranes, the PSF matrix was modified by incorporating sulfonated polysulfone (SPSF).

Systematic investigations were conducted on the synergistic effects of a pore-forming agent, coagulation bath temperature and SPSF doping in the casting solution on blended ultrafiltration membranes. The chemical composition of the membranes was analyzed using Fourier transform infrared spectroscopy. The morphology and surface roughness of the membranes were characterized using scanning electron microscopy and atomic force microscopy. The hydrophilicity of the membrane surface was analyzed using a contact angle meter. The permeability and antifouling properties of the blended membranes were also investigated through filtration experiments.

The results indicated that the blended ultrafiltration membranes demonstrated an optimal overall performance when PVP-K30 content was 5.0 Wt.%, coagulation bath temperature was 30°C and SPSF content was 2.4 Wt.%. In comparison to a pure PSF ultrafiltration membrane, there was a significant increase in pure water flux (390.7 L·m⁻²·h⁻¹) by 2.2 times, while bovine serum albumin retention slightly decreased to 93.8%. In addition, the flux recovery rate improved by 2.1 times (71.4%) compared to that of the original PSF ultrafiltration membrane.

The method provided a simple and practical solution for improving the antifouling and permeability of PSF ultrafiltration membranes.

SPSF was anticipated to serve as an excellent modification additive for the preparation of ultrafiltration membranes with superior properties.

Human resource management in professional service firms (PSF) is one of the most important instruments for promoting sustainable competitive advantage. Despite the major growth of scholars' interest in human resource management (HRM) issues in PSF, the body of knowledge in this field remains highly fragmented and diversified. The purpose of this paper is to systematize key evidence on the use of HRM practices in PSF.

The paper is based on a systematic literature review of 90 peer-reviewed journal papers.

The review revealed typical ability-, motivation- and opportunity-enhancing practices used by PSF and outlined how these HRM practices may differ among various PSF.

The paper provides scholars with an updated and comprehensive research landscape and development process in this important field, thereby contributing to greater research interest and enthusiasm for future research.

Multi-supplier project networks represent a large part of the business-to-business (B2B) sector as the scope of many projects requires that different providers participate in their development and delivery. This raises the question of how the integration of the resources of the various partners can be shaped successfully. Specifically, the different organizational identities provide institutional frames of reference to the resource-integrating firms. As the organizational identities are typically not harmonious with each other, at least partial misalignments of the institutional setting that shapes the resource integration processes may emerge. The purpose of this paper is to empirically investigate the impact of various organizational identities on the course and outcome of resource integration in project networks.

The paper makes use of interpretive phenomenology in conjunction with a qualitative case study approach to access the lived experience of actors of different professional service firms having experienced changes in resource integration in a B2B project network.

A conceptualization of organizational identity as an institutional context for resource integration is developed and empirically investigated. The findings show a strong impact on the firms’ organizational identities and the actors’ resource integration experience and evaluation. Moreover, the findings provide evidence that, if unmanaged, at least partial misalignment of the institutional arrangements of multi-organizational B2B project network represents a normal and also a stable condition.

As a first conceptualization and empirical analysis of the interplay between organizational identity and resource integration, this paper advances the current understanding of the institutional context for resource integration. It argues for the wider relevance of organizational identity constructs and paves the way for future development.

The purpose of this study is to investigate the effects of emerging market professional service small and medium-sized enterprises’ (PSF SME) internal competencies and capabilities on their ability to establish relationship value among clients and achieve superior financial performance. This study addresses the paucity of research on emerging market PSF SMEs and their ability to build value for their clients.

Data were collected from 251 senior managers or owners of PSF SMEs who were from an emerging market economy but had operations in various foreign markets. The two-step structural equation modeling procedure was used to analyze the data and investigate the hypothesized relationships.

The results show the positive impacts of the PSF SME’s human capital on innovativeness, service capabilities and relationship value. Human capital also had indirect positive impacts on relationship value and financial performance. Service capabilities were found to have a positive impact on relationship value and financial performance. In addition, innovativeness was found to have a positive impact on financial performance.

Emerging market PSF SMEs can gain competitive advantages and build solid long-term relationships with clients in the global marketplace when they focus on strengthening their human capital resources and successfully leveraging their innovativeness and service capabilities.

The study fills a gap in international business and management literature by offering guidance on how emerging market PSF SMEs can effectively use their internal resources and capabilities to build solid relationships with clients, deliver superior services and achieve global marketplace success.

On shield tunnel construction (STC) site, human error is widely recognized as essential to accident. It is necessary to explain which factors lead to human error and how these factors can influence human performance. Human reliability analysis supports such necessity through modeling the performance shaping factors (PSFs). The purpose of this paper is to establish and validate a PSF taxonomy for the STC context.

The approach taken in this study mainly consists of three steps. First, a description of the STC context is proposed through the analysis of the STC context. Second, the literature which stretch across the PSF methodologies, cognitive psychology and human factors of STC and other construction industries are reviewed to develop an initial set of PSFs. Finally, a final PSF set is modified and validated based on STC task analysis and STC accidents cases.

The PSF taxonomy constituted by 4 main components, 4 hierarchies and 85 PSFs is established for human behavior modeling and simulation under the STC context. Furthermore, by comparing and evaluating the performance of STC PSF and existing PSF studies, the proposed PSF taxonomy meets the requirement for qualitative and quantitative analysis.

The PSF taxonomy can provide a basis and support for human behavior modeling and simulation under the STC context. Integrating PSFs into a behavior simulation model provides a more realistic and integrated assessment of human error by manifesting the influence of each PSFs on the cognitive processes. The simulation results can suggest concrete points for the improvement of STC safety management.

This paper develops a taxonomy of PSFs that addresses the various unique influences of the STC context on human behaviors. The harsh underground working conditions and diverse resources of system information are identified as key characteristics of the STC context. Furthermore, the PSF taxonomy can be integrated into a human cognitive behavior model to predict the worker’s behavior on STC site in future work.

The purpose of this paper is to develop and validate a client-based reputation of business-to-business professional services firms scale (PSF-Rep) which measures clients’ perceptions of the reputation of professional service provider firms. So far, no multidimensional scale exists in the literature to measure the reputation of professional service firms, although the reputation dimensions of importance are likely to be very different from other settings.

From an initial pool of fieldwork-based items, an 18-item PSF-Rep scale is developed, which is validated using several samples – corporate financial decision-makers’ views of their accounting firms in a US national sample and organizational clients of one large legal firm with national presence.

The four-dimensional PSF-Rep scale meets all established reliability and validity criteria. Further, reputation and its dimensions (using PSF-Rep) are positively associated with important marketing outcomes, including word of mouth, loyalty intentions, trust and share of wallet.

As professional service markets become more competitive, firms recognize the importance of a good reputation in attracting customers. This research is the first to propose a psychometrically robust measure to capture client-based reputation of business-to-business professional services firms.

Research on international professional service firms (PSFs) has grown in recent years, reflecting the increasing relevance of these firms in the global economy. However, to date, no attempt has been made to systematically examine and integrate this literature. This study reviews the body of knowledge on the international management of PSFs and proposes a future research agenda that aims to strengthen the research on international PSFs, by applying the conceptual lens of PSF characteristics.

A systematic review of 108 empirical articles on the management of international PSFs was carried out.

The authors analyse where, how and what research was carried out on the international management of PSFs, and find that currently the field offers few opportunities to integrate findings or explain differences across different types of international PSFs. In recommendations for future research, the authors show how the lens of PSF characteristics can help overcome these issues and unveil promising avenues for future research that will lead to a more fine-grained theorising and understanding of the international management of PSFs.

The study provides a comprehensive state of the art of research on the international management of PSFs and a future research agenda, which builds on PSF characteristics to explore and better understand the heterogeneity of international PSFs, in order to develop more robust explanations of their behaviour and open new research avenues.

The purpose of this study is to examine the role of interaction in supporting value co-creation during pre-purchase customer journey stages when selling professional B-to-B services. First, value co-creation in professional service firms (PSFs) is reviewed, and, second, the role of interaction in the different stages of a customer’s pre-purchase journey is explored, specifically in the context of B-to-B human resource management services.

Qualitative, semi-structured interview data was collected from potential B2B customers of a PSF in question, providing a broad coverage of prospective clients in architecture, engineering and IT sector.

In general, the findings of this study indicate that interaction plays a crucial role in pre-purchasing stages of a customer journey. In particular, these findings form understanding of how various interaction channels and content support PSF’s ability to co-create value with its prospects.

The existing research tends to concentrate on how value is created for existing customers, and far less attention has been paid to the perspective of prospects. This study contributes theoretically by providing novel insights into the current literature on value co-creation in PSFs by providing an understanding of how interactions in pre-purchase phases affect the co-creation of value from the perspective of prospects, which is a less researched viewpoint. Empirically, this study offers managers much-needed, context-specific knowledge of PSFs by comparing differences and pulling together similarities from each customer journey stage of PSF prospects.