Users’ Continued Usage of Online Healthcare Virtual Communities: An Empirical Investigation in the Context of HIV Support Communities

This study uses data from an online HIV/AIDS health support virtual community to examine whether users’ emotional states and the social support they receive influence their continued usage. We adopt grief theory to conceptualize the negative emotions that people living with HIV/AIDS could experience. Linguistic analysis is used to measure the emotional states of the users and the informational and emotional support that they receive. Results show that users showing a higher level of disbelief and yearning are more likely to leave the community while those with a high level of anger and depression are more likely to stay on. Users who receive more informational support are more likely to leave once they have obtained the information they sought, but those who receive more emotional support are more likely to stay on. The findings of this study can help us better understand users’ support seeking behavior in online support VCs

Digital technology applications on indoor environment quality : a research thesis presented in partial fulfilment of the requirements for the degree of Master of Construction, Massey University, New Zealand

Figure 1 (Abdul Majeebu, 2019 Fig 1) is re-used under a Creative Commons Attribution 3.0 Unported (CC BY 3.0) license.Under the background of understanding various digital technologies, the aim of this research is to investigate the current application of digital technology in indoor environment quality. Indoor environment quality is closely related to residents' health. In modern times, digital technologies have become more sophisticated and widely used. But research on the application of digital technology to indoor environment quality is relatively limited. This research examines the results using a systematic literature review to develop a conceptual framework around the current digital technology situation, indoor environment factors that can be affected by digital technology, and digital technology application methods. This research has proven that 7 digital technologies, such as BIM, IoT, AR, VR, smart sensor, tridimensional laser scanning, and HDRI can be used to monitor, control, evaluate building performance, and assess occupant preferences in relation to indoor air quality, indoor thermal comfort, and other factors related to indoor environment quality. Moreover, it has contributed to providing convenient monitoring, maintaining the room in a healthy environment in real-time, as a reference for designers to achieve an optimal design, and so forth. However, the negative factors such as the cost of digital technology and energy consumption are not mentioned in this research, and the types of indoor spaces involved are also relatively wide, which are the limitations

Social Support and Social Satisfaction for Older Adults in Online Virtual Communities

We argue that older adults experience psychological changes based on significant events in their lives, and that their usage of online virtual communities (VCs) is driven by their varying needs for social support and social satisfaction. We propose that socioemotional choices they make, particularly their use of online VCs, are driven by a combination of need for social support and social satisfaction. We use survey data collected from older adults participating in three online VCs focused on retirement life in China. We expect our study to fill the gap in the literature on online VCs by providing insights into the motivation and satisfaction of older users in using online VCs, which can help in designing online virtual communities that can better cater to the psychological needs of older people

Robust estimation of bacterial cell count from optical density

Optical density (OD) is widely used to estimate the density of cells in liquid culture, but cannot be compared between instruments without a standardized calibration protocol and is challenging to relate to actual cell count. We address this with an interlaboratory study comparing three simple, low-cost, and highly accessible OD calibration protocols across 244 laboratories, applied to eight strains of constitutive GFP-expressing E. coli. Based on our results, we recommend calibrating OD to estimated cell count using serial dilution of silica microspheres, which produces highly precise calibration (95.5% of residuals <1.2-fold), is easily assessed for quality control, also assesses instrument effective linear range, and can be combined with fluorescence calibration to obtain units of Molecules of Equivalent Fluorescein (MEFL) per cell, allowing direct comparison and data fusion with flow cytometry measurements: in our study, fluorescence per cell measurements showed only a 1.07-fold mean difference between plate reader and flow cytometry data

The Effect of Grief on HIV Patients™ Need for Informational and Emotional Support

We apply stage theory of grief to study how HIV/AIDS patients™ emotional states affect their social support seeking behavior (i) in online communities. We propose that support seekers (i) have different preferences for informational and emotional suppor

The Adsorption of H₂ and C₂H₂ on Ge-Doped and Cr-Doped Graphene Structures: A DFT Study

In order to find an excellent sensing material for dissolved gases in transformer oil, the adsorption structures of intrinsic graphene (IG), Ge-doped graphene (GeG), and Cr-doped graphene (CrG) to H2 and C2H2 gas molecules were built. It was found that the doping site right above C atom (T) was the most stable structure by studying three potential doping positions of the Ge and Cr atom on the graphene surface. Then, the structural parameters, density of states, and difference state density of these adsorption systems were calculated and analyzed based on the density functional calculations. The results show that the adsorption properties of GeG and CrG systems for H2 and C2H2 are obviously better than the IG system. Furthermore, by comparing the two doping systems, CrG system exhibits more outstanding adsorption performances to H2 and C2H2, especially for C2H2 gas. Finally, the highest adsorption energy (−1.436 eV) and the shortest adsorption distance (1.981 Å) indicate that Cr-doped graphene is promising in the field of C2H2 gas-sensing detection

The Adsorption of H2 and C2H2 on Ge-Doped and Cr-Doped Graphene Structures: A DFT Study

In order to find an excellent sensing material for dissolved gases in transformer oil, the adsorption structures of intrinsic graphene (IG), Ge-doped graphene (GeG), and Cr-doped graphene (CrG) to H2 and C2H2 gas molecules were built. It was found that the doping site right above C atom (T) was the most stable structure by studying three potential doping positions of the Ge and Cr atom on the graphene surface. Then, the structural parameters, density of states, and difference state density of these adsorption systems were calculated and analyzed based on the density functional calculations. The results show that the adsorption properties of GeG and CrG systems for H2 and C2H2 are obviously better than the IG system. Furthermore, by comparing the two doping systems, CrG system exhibits more outstanding adsorption performances to H2 and C2H2, especially for C2H2 gas. Finally, the highest adsorption energy (−1.436 eV) and the shortest adsorption distance (1.981 Å) indicate that Cr-doped graphene is promising in the field of C2H2 gas-sensing detection