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Employees' personal Internet usage (PIU) has become increasingly common at work. It is important for both researchers and managers to understand how PIU affects employee creative performance. This study aims to examine what kind of PIU is likely to increase or decrease employee creative performance and why. The authors also examine a potential boundary condition for the effect of PIU on employee creative performance.

Based on conservation of resource (COR) theory and broaden and build theory, the authors investigated the impact of two types of PIU, namely within-task PIU and between-task PIU, on the creative performance of knowledge workers. The authors conducted a daily diary study and surveyed 107 knowledge workers in China over 10 consecutive working days (n = 1,070) to test the model.

The authors find that within-task PIU reduces knowledge workers' creative performance by decreasing the workers' positive emotion, whereas between-task PIU promotes the performance by increasing positive emotion. The above relationships become stronger when knowledge workers perceive a higher level of organisational support.

The authors' study makes theoretical contributions by advancing researchers' understanding of the situations in which PIU may decrease or increase employee creative performance. The findings are also useful for developing organisational policies to take advantage of the positive side of PIU whilst avoiding PIU's negative side.

This study investigated why employees' cyberloafing behavior is affected by their coworkers' cyberloafing behavior. By integrating social learning theory and deterrence theory, the authors developed a model to explain the role of employees' perceived certainty of formal and informal sanctions in understanding the effect of coworkers' cyberloafing behavior on employees' cyberloafing behavior.

The authors conducted a survey that involved a two-stage data collection process (including 293 respondents) to test our developed model. Mplus 7.0 was used to analyze the data.

The results revealed that employees' cyberloafing was positively affected by their coworkers' cyberloafing both directly and indirectly. The indirect effect of coworkers' cyberloafing on employees' cyberloafing was mediated by the employees' perceived certainty of formal and informal sanctions on cyberloafing. Employees' perceived certainty of formal and informal sanctions were found to mediate the relationship both separately (each type of sanctions mediates the relationship individually) and in combination (the two types of sanctions form a serial mediation effect).

The study reveals an important mechanism – employees’ perceived certainty of formal and informal sanctions – that underlies the relationship between coworkers' cyberloafing and employees' cyberloafing, thus, contributing to the cyberloafing literature. It also demonstrates the importance of negative reinforcement (perceived sanctions) in the social learning process, which contributes to the literature on social learning theory because previous studies have primarily focused on the role of positive reinforcement. Lastly, the study reveals a positive relationship between employees' perceived certainty of formal sanctions and informal sanctions, which has important implications for deterrence theory.

Internet monitoring in organizations can be used to monitor risks associated with Internet usage and information systems in organizations, such as employees' cyberloafing behavior and information security incidents. Extant research has mainly discussed the effect of Internet monitoring in achieving the targeted goals (e.g. mitigating cyberloafing behavior and information security incidents), but little attention has been paid to the possible side effects of Internet monitoring. Drawing on affective events theory, the authors attempt to reveal that Internet monitoring may cause side effects on employees' Internet usage policy satisfaction, intrinsic work motivation and affective organizational commitment.

The authors conducted a field experiment in a software development company. In total, 70 employees participated in the study. Mann–Whitney U test was employed to analyze the data.

The results suggest that Internet monitoring decreased employees' satisfaction with the Internet usage policy, intrinsic work motivation, as well as affective organizational commitment.

This study contributes to the literature by examining the side effects of Internet monitoring on employees. It also has implications for organizations to make appropriate decisions regarding whether to implement Internet monitoring.

Unauthorised file sharing (UFS) in online communities (OCs) is a major intellectual property concern. Researchers have traditionally viewed UFS as digital piracy and have suggested that deterrents, such as legal actions, should be in place. However, previous research has not considered the OC context and cannot explain why OC members share unauthorised files even when there is legislation against this in place. In OCs, UFS exhibits features of public goods contribution. Therefore, the authors claim that public goods contribution motivations can provide a compelling explanation for UFS in OCs.

The authors propose a theoretical model in which two egoistic public goods contribution motivations (namely, warm-glow giving and demand for resources) are tested alongside motivations informed by the sanctions described by deterrence theory, a theory widely used within the digital piracy perspective.

The authors find that warm glow and demand for resources are positively related to UFS in OCs; the effect of warm glow is moderated by users' attachment to OCs. Importantly, the results suggest that although sanctions significantly predict UFS, the effect of sanctions on UFS becomes insignificant in the presence of warm glow, demand for resources and attachment.

The study offers new insights into why users engage in UFS and highlights that public goods contribution should be taken into account in developing anti-piracy policies and practices.

Additive manufacturing (AM), a method used in the nuclear, space and racing industries, allows the creation of customized titanium alloy scaffolds with highly defined external shape and internal structure using rapid prototyping as supporting external structures within which bone tissue can grow. AM allows porous tantalum parts with mechanical properties close to that of bone tissue to be obtained.

In this paper, porous tantalum structures with different scan distance were fabricated by AM using laser multi-layer micro-cladding.

Porous tantalum samples were tested for resistance to compressive force and used scanning electron microscope to reveal the morphology of before and after compressive tests. Their structure and mechanical properties of these porous Ta structures with porosity in the range of 35.48 to 50 per cent were investigated. The porous tantalum structures have comparable compressive strength 56 ∼ 480 MPa, and elastic modulus 2.8 ∼ 9.0GPa, which is very close to those of human spongy bone and compact bone.

This paper does not demonstrate the implant results.

It can be used as implant material for the repair bone.

It can be used for fabrication of other porous materials.

This paper system researched the scan distance on how to influence the mechanical properties of fabricated porous tantalum structures.

Laser additive manufacturing (LAM) technology based on powder bed has been used to manufacture complex geometrical components. In this study, IN625 superalloys were fabricated by high-power fiber laser without cracks, bounding errors or porosity. Meanwhile, the objectives of this paper are to systemically investigate the microstructures, micro-hardness and the precipitated Laves phase of deposited-IN625 under different annealing temperatures.

The effects of annealing temperatures on the microstructure, micro-hardness and the precipitated Laves phase were studied by optical microscope (OM), scanning electron microscopy (SEM), X-ray diffraction (XRD), energy dispersive spectrometer (EDS), selected area electron diffraction (SAED), backscattered electron (BSE) imaging in the SEM and transmission electron microscopy (TEM), respectively. The thermal stability of the dendritic morphology about IN625 superalloys was investigated through annealing at temperatures range from 1,000°C to 1,200°C.

It is found that the microstructure of deposited-IN625 was typical dendrite structure. Besides, some Laves phase precipitated in the interdendritic region results in the segregation of niobium and molybdenum. The thermal stability indicate that the morphology of dendrite can be stable up to 1,000°C. With the annealing temperatures increasing from 1,000 to 1,200°C, the Laves phase partially dissolves into the γ-Ni matrix, and the morphology of the remaining Laves phase is changing from irregular shape to rod-like or block-like shape.

The heat treatment used on the IN625 superalloys is helpful for knowing the evolution of microstructures and precipitated phases thermal stability and mechanical properties.

Due to the different kinds of application conditions, the original microstructure of the IN625 superalloys fabricated by LAM may not be ideal. So exploring the influence of annealing treatment on IN625 superalloys can bring theory basis and guidance for actual production.

This study continues valuing the fabrication of IN625 by LAM. It shows the effect of annealing temperatures on the shape, size and distribution of Laves phase and the microstructures of deposited-IN625 superalloys.

Nature and occurrence of food-borne pathogens in raw and processed food products evolved greatly in the past few years due to new modes of transmission and resistance build-up against sundry micro-/macro-environmental conditions. Assurance of food health and safety thus gained immense importance, for which bio-sensing technology proved very promising in the detection and quantification of food-borne pathogens. Considering the importance, different studies have been performed, and different biosensors have been developed. This study aims to summarize the different biosensors used for the deduction of food-borne pathogens.

The present review highlights different biosensors developed apropos to food matrices, factors governing their selection, their potential and applicability. The paper discusses some related key challenges and constraints and also focuses on the needs and future research prospects in this field.

The shift in consumers’ and industries’ perceptions directed the further approach to achieve portable, user and environmental friendly biosensing techniques. Despite of these developments, it was still observed that the comparison among the different biosensors and their categories proved tedious on a single platform; since the food matrices tested, pathogen detected or diagnosed, time of detection, etc., varied greatly and very few products have been commercially launched. Conclusively, a challenge lies in front of food scientists and researchers to maintain pace and develop techniques for efficiently catering to the needs of the food industry.

Biosensors deduction limit varied with the food matrix, type of organism, material of biosensors’ surface, etc. The food matrix itself consists of complex substances, and various types of food are available in nature. Considering the diversity of food there is a need to develop a universal biosensor that can be used for all the food matrices for a pathogen. Further research is needed to develop a pathogen-specific biosensor that can be used for all the food products that may have accuracy to eliminate the traditional method of deduction.

The present paper summarized and categorized the different types of biosensors developed for food-borne pathogens.

Independent directors are important corporate decision participants and makers. Based on the Chinese cultural background, this paper interprets the listing order of independent directors as independent directors’ status, exploring their influence on the corporate research and development (R&D) behavior.

This paper studies A-share listed firms in China from 2008 to 2018 as the sample. The main method is ordinary least square (OLS) regression. We also use other methods to deal with endogenous problems, such as the firm fixed effect method, change model method, two-stage instrumental variable method, and Heckman two-stage method.

(1) Higher independent directors’ status attribute to more effective exertion of supervision and consultation function, and positively enhance the corporate R&D investment. The increase of the independent director’ status by one standard deviation will increase the R&D investment by 4.6%. (2) The above effect is more influential in firms with stronger traditional culture atmosphere, higher information opacity and higher performance volatility. (3) High-status independent directors promote R&D investment by improving the scientificity of R&D evaluation and reducing information asymmetry. (4) The enhancing effect of independent director’ status on R&D investment is positively associated with the firm’s patent output and market value.

This paper contributes to understanding the relationship between the independent directors’ status and their duty execution from an embedded cultural background perspective. The findings of the study enlighten the improvement of corporate governance efficiency and the healthy development of the capital market.

This information will be useful in the selection of materials and technology for the detection and removal of mercury ions at a low cost and with high sensitivity and selectivity. The purpose of this study is to provide the useful information for selection of materials and technology to detect and remove the mercury ions from water with high sensitivity and selectivity. The purpose of this study is to provide the useful information for selection of materials and technology to detect and remove the mercury ions from water with high sensitivity and selectivity.

Different nano- and bio-materials allowed for the development of a variety of biosensors – colorimetric, chemiluminescent, electrochemical, whole-cell and aptasensors – are described. The materials used for their development also make it possible to use them in removing heavy metals, which are toxic contaminants, from environmental water samples.

This review focuses on different technologies, tools and materials for mercury (heavy metals) detection and remediation to environmental samples.

This review gives up-to-date and systemic information on modern nanotechnology methods for heavy metal detection. Different recognition molecules and nanomaterials have been discussed for remediation to water samples. The present review may provide valuable information to researchers regarding novel mercury ions detection sensors and encourage them for further research/development.

This review aims to focus on recent reported research work on the construction and function of different electrochemical DNA biosensors. It also describes different sensing materials, chemistries of immobilization probes, conditions of hybridization and principles of transducing and amplification strategies.

The human disease-related mutated genes or DNA sequence detection at low cost can be verified by the electrochemical-based biosensor. A range of different chemistries is used by the DNA-based electrochemical biosensors, out of which the interactions of nanoscale material with recognition layer and a solid electrode surface are most interesting. A diversity of advancements has been made in the field of electrochemical detection.

Some important aspects are also highlighted in this review, which can contribute in the creation of successful biosensing devices in the future.

This paper provides an updated review of construction and sensing technologies in the field of biosensing.