Teaching and Learning Under COVID-19 Public Health Edicts: The Role of Household Lockdowns and Prior Technology Usage

Public health edicts necessitated by COVID-19 prompted a rapid pivot to remote online teaching and learning. Two major consequences followed: households became students\u27 main learning space, and technology became the sole medium of instructional delivery. We use the ideas of digital disconnect and digital divide to examine, for students and faculty, their prior experience with, and proficiency in using, learning technology. We also explore, for students, how household lockdowns and digital capacity impacted learning. Our findings are drawn from 3806 students and 283 faculty instructors from nine higher education institutions across Asia, Australia, Europe, and North America. For instructors, we find little evidence of a digital divide but some evidence of a digital disconnect. However, neither made a difference to self-reported success in transitioning courses. Faculty instructors were impacted in a myriad of diverse ways. For students, we show that closure and confinement measures which created difficult living situations were associated with lower levels of confidence in learning. The digital divide that did exist among students was less influential than were household lockdown measures in undermining student learning

Overground walking speed changes when subjected to body weight support conditions for nonimpaired and post stroke individuals

<p>Abstract</p> <p>Background</p> <p>Previous research has shown that body weight support (BWS) has the potential to improve gait speed for individuals post-stroke. However, body weight support also reduces the optimal walking speed at which energy use is minimized over the gait cycle indicating that BWS should reduce walking speed capability.</p> <p>Methods</p> <p>Nonimpaired subjects and subjects post-stroke walked at a self-selected speed over a 15 m walkway. Body weight support (BWS) was provided to subjects at 0%, 10%, 20%, 30%, and 40% of the subject's weight while they walked overground using a robotic body weight support system. Gait speed, cadence, and average step length were calculated for each subject using recorded data on their time to walk 10 m and the number of steps taken.</p> <p>Results</p> <p>When subjected to greater levels of BWS, self-selected walking speed decreased for the nonimpaired subjects. However, subjects post-stroke showed an average increase of 17% in self-selected walking speed when subjected to some level of BWS compared to the 0% BWS condition. Most subjects showed this increase at the 10% BWS level. Gait speed increases corresponded to an increase in step length, but not cadence.</p> <p>Conclusions</p> <p>The BWS training environment results in decreased self-selected walking speed in nonimpaired individuals, however self-selected overground walking speed is facilitated when provided with a small percentage of body weight support for people post-stroke.</p

The Potential Contribution of Mass Treatment to the Control of Plasmodium falciparum Malaria

Mass treatment as a means to reducing P. falciparum malaria transmission was used during the first global malaria eradication campaign and is increasingly being considered for current control programmes. We used a previously developed mathematical transmission model to explore both the short and long-term impact of possible mass treatment strategies in different scenarios of endemic transmission. Mass treatment is predicted to provide a longer-term benefit in areas with lower malaria transmission, with reduced transmission levels for at least 2 years after mass treatment is ended in a scenario where the baseline slide-prevalence is 5%, compared to less than one year in a scenario with baseline slide-prevalence at 50%. However, repeated annual mass treatment at 80% coverage could achieve around 25% reduction in infectious bites in moderate-to-high transmission settings if sustained. Using vector control could reduce transmission to levels at which mass treatment has a longer-term impact. In a limited number of settings (which have isolated transmission in small populations of 1000–10,000 with low-to-medium levels of baseline transmission) we find that five closely spaced rounds of mass treatment combined with vector control could make at least temporary elimination a feasible goal. We also estimate the effects of using gametocytocidal treatments such as primaquine and of restricting treatment to parasite-positive individuals. In conclusion, mass treatment needs to be repeated or combined with other interventions for long-term impact in many endemic settings. The benefits of mass treatment need to be carefully weighed against the risks of increasing drug selection pressure

Finishing the euchromatic sequence of the human genome

The sequence of the human genome encodes the genetic instructions for human physiology, as well as rich information about human evolution. In 2001, the International Human Genome Sequencing Consortium reported a draft sequence of the euchromatic portion of the human genome. Since then, the international collaboration has worked to convert this draft into a genome sequence with high accuracy and nearly complete coverage. Here, we report the result of this finishing process. The current genome sequence (Build 35) contains 2.85 billion nucleotides interrupted by only 341 gaps. It covers ∼99% of the euchromatic genome and is accurate to an error rate of ∼1 event per 100,000 bases. Many of the remaining euchromatic gaps are associated with segmental duplications and will require focused work with new methods. The near-complete sequence, the first for a vertebrate, greatly improves the precision of biological analyses of the human genome including studies of gene number, birth and death. Notably, the human enome seems to encode only 20,000-25,000 protein-coding genes. The genome sequence reported here should serve as a firm foundation for biomedical research in the decades ahead

The prophecy of Ulrich Beck: signposts for the social sciences

This special issue on the legacy of Ulrich Beck is aimed to stimulate reflection both on the specific uses to which Beck’s conceptual and theoretical apparatus can be put within risk studies and the wider significance of his academic project for the social sciences. In this end-piece, we draw out the key themes which surface in the different contributions relating to five particular areas: the nature of risk; advancements in methods; issues of non-knowledge and uncertainty; the development of cosmopolitan risk communities; and the situated character of individualization. We discuss the implications of the accounts contained in this special issue and reflect on the impact and influence of Beck’s sustained engagement with colleagues around the globe, concluding that the concepts and methods that Beck bequeathed the social sciences are set to live on and thrive

Live Streamers on Twitch.tv as Social Media Influencers: Chances and Challenges for Strategic Communication

Twitch.tv is one of the most successful online live streaming platforms in the world, with 200 million viewers, 2 million regular “streamers,” and a market value of over USD1billion. In this paper, we offer a first conceptualization of streamers as social media influencers, and how effectively they can perform strategic communication for sponsors. We draw on extensive ethnographic research and over a hundred semi-structured interviews with streamers to address two questions: first, how does Twitch operate as a platform for strategic communication; second, what skills do streamers need to be successful influencers? In the first case, we show Twitch is well suited to influencing, in large part due to its integration of data analytics, while streamers are using these tools to adopt a business-oriented mindset; in the second case, we show the importance of authenticity to both streamers and clients, and how channels of different sizes offer strategic communication opportunities. The article contributes to the emerging literature on Twitch, developing insights from influencing and strategic communication, but given the increasing scope of live streaming, we also argue the phenomenon – particularly when combined with the economic dynamics of influencing – is just as important for making sense of the wider media landscape today