Purpose More attention should be paid to project managers’ (PMs) job satisfaction as they play an important role in ensuring projects are completed successfully. The purpose of this paper is to identify human resource management (HRM) policies and practices that lead to higher PMs’ job satisfaction. Design/methodology/approach A questionnaire survey was conducted on PMs who are working in construction firms and project management consultancy firms. Data were collected via random, convenience and snowball sampling. The data collected were analysed using partial least square-structural equation modelling, independent samples t-test and Pearson’s correlation. Findings The findings show that PMs who are satisfied with their firms’ HRM practices and job rewards also have higher job satisfaction. Several HRM strategies that give rise to higher job satisfaction are identified, e.g. a system to recognise and develop talent, and taking active steps to identify and develop backups in case of emergency. Unfortunately, some practices are not implemented to a significant extent, and these include: systematically recruiting and retaining talented PMs, encouraging PMs to plan for their careers, offering performance and development coaching, and appraising employees. Research limitations/implications The limitations include the low response rate and the relatively small sample size of 81. The profile of respondents is largely from construction companies with more than 150 staff, and, therefore, the findings are more applicable to medium- to large-sized construction firms. Practical implications The study identified many HRM practices and policies that are significantly associated with PMs’ job satisfaction, yet many of these are not implemented to a significant extent by the employers. The practical implication is that employers of PMs should systematically implement these in order that their PMs have higher job satisfaction which is important for a project’s success. Originality/value The originality of this research is that the HRM practices and policies that are associated with job satisfaction of PMs are uncovered. Its value is in showing that PMs derive greater job satisfaction when HRM policies encompass talent development, career coaching and a personalised management style. Among these important practices, those that have been neglected were also identified. The study offers recommendations on the HRM practices that firms should be put in place for their PMs to experience higher job satisfaction.

Titania nanofibers with fiber diameters ranging from 194 to 441 nm were electrospun as light-scattering photoactive materials. Transmittance UV−vis spectroscopy revealed that the scattering behavior of these samples was linearly proportional to the fiber diameter and the fiber deposition density, which is in agreement with a scattering model based on the Mie theory. The photocurrent− voltage characteristics of the nanostructured samples with a scattering band that overlapped with the absorption band of titania demonstrated a photocurrent that increased steadily with the fiber deposition density. Scattering-enhanced superior photocurrent was found to be 4.8 times higher than that of other samples without direct overlapping between the scattering and absorption bands. Photocatalytic hydrogen evolution under UV irradiation was associated with a similar increase in scattering. The optimized hydrogen evolution rate was 34.9 μmol/g•cm 2 •h, which was more than two times higher than that for other samples that had less scattering.

Poly(methyl methacrylate) nanofibers with desired fiber diameters that ranged from 336 to 896 nm were electrospun as light scattering and propagation materials. The light scattering behavior of these samples as a function of the fiber diameter and fiber deposition thickness was examined by UV-vis spectrophotometry, which revealed the scattering bands in the absorption spectra. The scattering bands of these nanofibers were linearly proportional to the fiber diameter, which shows good agreement with a scattering model based on the Mie theory. The light scattering and prolonged light path lengths in the nanofiber scaffolds were monitored and quantified by the photoluminescence of a fluorescent dye, Coumarin 6, which was preloaded into the polymer nanofibers. The photoluminescence after proper normalization showed a second-order dependence on the dye loading per unit area, which is significantly different from the spin-coated thin-film samples following a first-order relationship. Nonlinear photoluminescence enhancements indicated prolonged light path lengths and multiple light absorptions within the fiber scaffolds as a result of light scattering. Even with relatively broad scattering band widths, the light scattering and photoluminescence of the electrospun nanofibers exhibited considerable wavelength selectivity, especially as the scattering bands overlapped with the excitation wavelengths of the fluorescence reagent.

The decellularization of long segments of tubular tissues such as blood vessels may be improved by perfusing decellularization solution into their lumen. Particularly, transmural flow that may be introduced by the perfusion, if any, is beneficial to removing immunogenic cellular components in the vessel wall. When human umbilical arteries (HUAs) were perfused at a transmural pressure, however, very little transmural flow was observed. We hypothesized that a watertight lining at the abluminal surface of HUAs hampered the transmural flow and tested the hypothesis by subjecting the abluminal surface to enzyme digestion. Specifically, a highly viscous collagenase solution was applied onto the surface, thereby restricting the digestion to the surface. The localized digestion resulted in a water-permeable vessel without damaging the vessel wall. The presence of the abluminal lining and its successful removal were also supported by evidence from SEM, TEM, and mechanical testing. The collagenase-treated HUAs were decellularized with 1% sodium dodecyl sulfate (SDS) solution under either rotary agitation, simple perfusion, or pressurized perfusion. Regardless of decellularization conditions, the decellularization of HUAs was significantly enhanced after the abluminal lining removal. Particularly, complete removal of DNA was accomplished in 24 h by pressurized perfusion of the SDS solution. We conclude that the removal of the abluminal lining can improve the perfusion-assisted decellularization.