Turbulence in mobile-bed streams

This study is devoted to quantify the near-bed turbulence parameters in mobile-bed flows with bed-load transport. A reduction in near-bed velocity fluctuations due to the decrease of flow velocity relative to particle velocity of the transporting particles results in an excessive near-bed damping in Reynolds shear stress (RSS) distributions. The bed particles are associated with the momentum provided from the flow to maintain their motion overcoming the bed resistance. It leads to a reduction in RSS magnitude over the entire flow depth. In the logarithmic law, the von Kármán coefficient decreases in presence of bed-load transport. The turbulent kinetic energy budget reveals that for the bed-load transport, the pressure energy diffusion rate near the bed changes sharply to a negative magnitude, implying a gain in turbulence production. According to the quadrant analysis, sweep events in mobile-bed flows are the principal mechanism of bed-load transport. The universal probability density functions for turbulence parameters given by Bose and Dey have been successfully applied in mobile-bed flows

Using cocreated visually informed community mental health education in low‐ and middle‐income countries: A case study of youth substance misuse in Assam, India

Abstract Introduction Our aim is to evaluate the visually informed community mental health education materials cocreated in our research on youth substance misuse in Assam, India, and to reflect on what we might learn for similar initiatives in low‐ and middle‐income countries. Methods Materials consist of: (i) images participants brought to the interview; (ii) 30 posters cocreated by participants to convey key messages from their interview; (iii) six short films on the implications of addiction, and (iv) an animation of our Pathways to Recovery model. We also created a community education package that incorporated these materials. We analyse feedback from three groups of events and a social media campaign, which drew variably across our materials and engaged a range of audiences. Results Outcomes indicate the cocreation process and focus on the visual was successful in promoting young people's voice, increasing awareness and has potential for stigma reduction. Our educational package was deemed useful in increasing awareness and has potential for prevention and treatment. Conclusions Our case study offers insights into community mental health education in low‐ and middle‐income countries, confirming the importance of cocreation, the usefulness of visual materials and the potential of social media campaigns while acknowledging the importance of local context in health messaging, particularly for stigmatized topics. Patient or Public Contribution Service users were involved in the cocreation of the materials evaluated in this study and contributed as presenters in one of the events reported. Members of the public took part in events in which the materials were shared and provided us with the feedback analysed in this article

A new species of stone loach (Teleostei: Nemacheilidae: Schistura) from Arunachal Pradesh, India

Choudhury, Hrishikesh, Dey, Abhinit, Bharali, Ratul Ch., Sarma, Dandadhar, Vishwanath, Waikhom (2019): A new species of stone loach (Teleostei: Nemacheilidae: Schistura) from Arunachal Pradesh, India. Zootaxa 4551 (1), DOI: https://doi.org/10.11646/zootaxa.4551.1.

International Journal of Sociology and Anthropology

Child’s growth and nutritional status in two communities-Mishing tribe and Kaibarta caste o

Psilorhynchus kamengensis, a new species of fish (Teleostei: Psilorhynchidae) from northeast India

Psilorhynchus kamengensis, new species, is described from a stream of the Kameng River, a northern tributary to the Brahmaputra drainage, Arunachal Pradesh, northeast India. The new species belongs to the P. balitora species group and can be distinguished from all other members of this group by the presence of a longer post-epiphyseal fontanelle, 3 unbranched anal-fin rays, 9 + 8 caudal-fin rays, 35 vertebrae and fin coloration. The validity of the species is also corroborated by molecular phylogenetic analysis based on the mitochondrial cyt b gene