Fertility building strategies during the conversion period – assessment of performance in a stockless field vegetable rotation

This report was presented at the UK Organic Research 2002 Conference of the Colloquium of Organic Researchers (COR). Nutrient off-takes, residue returns and nutrient inputs were measured during and after conversion from a conventional arable system to organic vegetables with cereals. This data was used to construct nutrient budgets to assess the effectiveness of contrasting fertility building strategies and various cropping regimes. The effect of placing the cereal crops in different places in the crop sequence was also considered

Path to Higher Education

This study focuses on the career aspirations of middle and high school students living in an impoverished area of Cape Town, South Africa. It was discovered that students in this area tended to have high expectations of themselves pertaining to success after graduating high school, as well as their classmates. They believed they would be accepted into prestigious universities and achieve their career goals, despite being unaware of several key pieces of information, such as how to apply to university and how to get financial aid. The ultimate conclusion of the study was that these students required more extensive career counselling in middle school and the early years of high school in order to get them on a path to higher education

The power of naked protest in a shrinking democratic space

Even while new technologies transform political protest, citizens continue to use their bodies in acts of civil resistance. In northern Uganda, citizens are using public nakedness to protest land dispossession by an increasingly authoritarian state, which grants the protester forms of power and highlights constraints on political speech

Naked bodies and collective action: repertoires of protest in Uganda’s militarised, authoritarian regime

How can citizens living under increasingly militarized and authoritarian regimes exercise political voice? Using an in-depth case study of naked protest in modern day Uganda, this article finds that naked bodies allow citizens to employ three types of overlapping power to confront a militarized authoritarian state: biopower, symbolic power, and cosmological power. The study illustrates one way in which citizens seek to engage militarized regimes—and in doing so, how political voice takes particular forms with limited capacity to instigate broader political claim-making that might be associated with country- or region-wide political action

The influence of facemasks on communication in healthcare settings: a systematic review

PurposeAlthough a well-established aspect of healthcare practice, the impact of facemasks on verbal communication is surprisingly ambiguous.Materials and MethodsA systematic search was conducted in APA PSYCHinfo, CINAHL, NHS Knowledge Network, Medline and SPORTDiscus databases from inception to November 2022 according to the PRISMA guidelines. Studies reporting an objective measure of speech understanding in adults, where information was transmitted or received whilst wearing a facemask were included. Risk of bias of included studies was assessed with the Newcastle-Ottawa score.ResultsFour hundred and thirty-three studies were identified, of which fifteen were suitable for inclusion, incorporating 350 participants with a median age of 49 (range 19 to 74) years. Wide heterogeneity of test parameters and outcome measurement prohibited pooling of data. 93% (14 of 15) studies reported a deleterious effect of facemasks on speech understanding, and 100% (5 of 5) of the included studies reported attenuation of sound with facemask usage. Background noise added further deleterious effects on speech understanding which was particularly problematic within hearing-impaired populations. Risk of bias in included studies varied but overall was modest.ConclusionsDespite considerable complexity and heterogeneity in outcome measure, 93% (14 of 15) articles suggest respiratory protective equipment negatively affects speech understanding in normal hearing and hearing-impaired adults.Implications for Rehabilitation As a result of the covid-19 pandemic, facemask use is now commonplace across all healthcare and rehabilitation settings and has material implications for interpersonal communication. This systematic review of human communicative studies highlights that the use of facemasks does indeed inhibit communication through effects on speech intelligibility and through sound attenuation. These effects are evident in both normal hearing and hearing-impaired adults due to the visual cues required with lipreading and facial expressions during communication. The presence of background noise also produces deleterious effects on speech understanding and is more problematic for hearing-impaired populations. Simple recommendations to reduce background noise (where possible), to step closer (where social-distancing rules permit), to speak louder or to use speech to text applications (if practical) could all mitigate these communicative barriers. Further an awareness of persons with hearing impairments, the function (or otherwise) of hearing aids in those patients that require these, and an ability to use transparent facemasks can be specifically helpful

Constraints on terrestrial planet formation timescales and equilibration processes in the Grand Tack scenario from Hf-W isotopic evolution

We examine 141 N-body simulations of terrestrial planet late-stage accretion that use the Grand Tack scenario, coupling the collisional results with a hafnium-tungsten (Hf-W) isotopic evolution model. Accretion in the Grand Tack scenario results in faster planet formation than classical accretion models because of higher planetesimal surface density induced by a migrating Jupiter. Planetary embryos that grow rapidly experience radiogenic ingrowth of mantle $^{182}$W that is inconsistent with the measured terrestrial composition, unless much of the tungsten is removed by an impactor core that mixes thoroughly with the target mantle. For physically Earth-like surviving planets, we find that the fraction of equilibrating impactor core $k_\text{core} \geq 0.6$ is required to produce results agreeing with observed terrestrial tungsten anomalies (assuming equilibration with relatively large volumes of target mantle material; smaller equilibrating mantle volumes would require even larger $k_\text{core}$). This requirement of substantial core re-equilibration may be difficult to reconcile with fluid dynamical predictions and hydrocode simulations of mixing during large impacts, and hence this result does not favor the rapid planet building that results from Grand Tack accretion.Comment: 34 pages, 5 figures, published in EPS