A combined first principles and experimental approach to Bi2WO6.

Here we synthesized Bi2WO6 (BWO) using both solid-state reaction (SBWO) and hydrothermal (HBWO-U and HBWO-S) methods. The orthorhombic Pca21 phase purity in all samples is confirmed from Rietveld refinement of X-ray diffraction data, Raman spectroscopy, and Fourier transform infrared spectroscopy. The HBWO-U and HBWO-S morphology revealed rectangular, spherical, and rod-like features with an average particle size of 55 nm in field emission scanning electron micrographs. A high-resolution transmission electron micrograph showed spherical-shaped particles in the HBWO-U sample with an average diameter of ∼10 nm. The diffuse reflectance-derived indirect electronic band gaps lie within the 2.79-3.23 eV range. The BWO electronic structure is successfully modeled by Hubbard interaction Ud and Up corrected Perdew-Burke-Ernzerhof generalized gradient approximation GGA-PBE+Ud+Up with van der Waals (vdW) force in effect. The optimized (Ud, Up) values are further justified by tuning the Hartree-Fock (HF) exact-exchange mixing parameter αHF from 25% in Heyd-Scuseria-Ernzerhof (HSE06) to 20% in the PBE-HF20% functional. Moreover, no inconsistencies were seen in the GGA-PBE+Ud+Up+vdW simulated crystallographic parameters, and the elastic tensor, phonon, and linear optical properties. Overall, the computationally cheap GGA-PBE+Ud+Up with vdW force may have successfully probed the physical properties of BWO.

Scarf Injury: a qualitative examination of the emergency response and acute care pathway from a unique mechanism of road traffic injury in Bangladesh.

BACKGROUND: Road traffic injuries (RTI) are the leading cause of death worldwide in children over 5 and adults aged 18-29. Nonfatal RTIs result in 20-50 million annual injuries. In Bangladesh, a new mechanism of RTI has emerged over the past decade known as a 'scarf injury.' Scarf injuries occur when scarves, part of traditional female dress, are caught in the driveshaft of an autorickshaw. The mechanism of injury results in novel, strangulation-like cervical spine trauma. This study aimed to understand the immediate emergency response, acute care pathway, and subsequent functional and health outcomes for survivors of scarf injuries. METHODS: Key informant interviews were conducted with female scarf injury survivors (n = 12), caregivers (n = 6), and health care workers (n = 15). Themes and subthemes were identified via inductive content analysis, then applied to the three-delay model to examine specific breakdowns in pre-hospital care and provide a basis for future interventions. FINDINGS: Over half of the scarf injury patients were between the ages of 10 and 15. All but two were tetraplegic. Participants emphasized less than optimal patient outcomes were due to unawareness of scarf injuries and spinal cord injuries among the general public and health professionals; unsafe and inefficient bystander first aid and transportation; and high cost of acute health care. CONCLUSIONS: Females in Bangladesh are at significant risk of sustaining serious and life-threatening trauma through scarf injuries in autorickshaws, further worsened through inadequate care along the trauma care pathway. Interventions designed to increase awareness and knowledge of basic SCI care at the community and provider level would likely improve health and functional outcomes.

Exploring the intersection of critical disability studies, humanities and global health through a case study of scarf injuries in Bangladesh.

This article puts critical disability studies and global health into conversation around the phenomenon of scarf injury in Bangladesh. Scarf injury occurs when a woman wearing a long, traditional scarf called an orna rides in a recently introduced autorickshaw with a design flaw that allows the orna to become entangled in the vehicle's driveshaft. Caught in the engine, the orna pulls the woman's neck into hyperextension, causing a debilitating high cervical spinal cord injury and quadriplegia. The circumstances of the scarf injury reveal the need for more critical cultural analysis than the fields of global health and rehabilitation typically offer. First, the fatal design flaw of the vehicle reflects different norms of gender and dress in China, where the vehicle is manufactured, versus Bangladesh, where the vehicle is purchased at a low price and assembled on-site-a situation that calls transnational capitalist modes of production and exchange into question. Second, the experiences of women with scarf injuries entail many challenges beyond the injury itself: the transition to life with disability following the rehabilitation period is made more difficult by negative perceptions of disability, lack of resources and accessible infrastructure, and cultural norms of gender and class in Bangladesh. Our cross-disciplinary conversation about women with scarf injuries, involving critical disability studies, global health and rehabilitation experts, exposes the shortcomings of each of these fields but also illustrates the urgent need for deeper and more purposeful collaborations. We, therefore, argue that the developing subfield of global health humanities should include purposeful integration of a humanities-based critical disability studies methodology.

Gender equity in global injury research-A case example from Bangladesh.

Global injury research and policy too often fail to acknowledge the need for gender-sensitive approaches in their efforts to effectively reduce the detrimental burden of traumatic road injuries. A case example from Bangladesh demonstrates the distinct challenges females face and how addressing those are critical to achieving global health equity.

Manual vacuum aspiration: a safe and cost-effective substitute of electric vacuum aspiration for the surgical management of early pregnancy loss.

OBJECTIVE: To compare the efficacy, safety and cost-effectiveness of Manual vacuum aspiration (MVA) with Electrical vacuum aspiration (EVA) in the management of first trimester pregnancy loss. METHODS: A single-centre randomized controlled trial (RCT) was conducted at Maternal and Child Health Centre (MCHC), Unit-I, Pakistan Institute of Medical Sciences (PIMS), Islamabad from April 2007-Dec 2008. A total of 176 cases with early pregnancy loss at < 12 weeks gestation, with a diagnosis of anembryonic pregnancy, incomplete, missed or septic induced abortion and molar pregnancy were randomly allocated to either MVA or EVA in the operation theatre. RESULTS: A total of 176 women were included out of which 70 underwent EVA and 106 had MVA. Baseline characteristics were similar in the two groups except significantly higher gestational age and gestational sac diameter in MVA group. Majority of EVA were performed under general anaesthesia (95.7%) while majority of MVA were performed under paracervical block (60.3%). Complete evacuation was achieved in 89.6% with MVA vs 91.4% with EVA (p=0.691). MVA was superior in terms of significantly less blood loss (62.08 +/- 32.19 vs 75.71 +/- 35.53; p=0.008), shorter hospital stay (12.26 hours +/- 6.97 vs 19.54 hours +/- 7.95; p=0.000) and less hospital cost (Rs 1419.5 +/- 1337.620 vs Rs. 3222.5 +/- 1816.02; p=0.000). Post-operative pain assessment by visual analogue score (VAS) at 0 and 6 hours showed no significant difference (p=0.845 and p=0.157 respectively). The only complication was uterine perforation in 2 (2.4%) cases both belonging to EVA. CONCLUSION: MVA is a safe and effective alternative of conventional EVA. It is superior to EVA in terms of reduced cost and need for general anaesthesia and is thus useful at low resource setting with scarcity of electricity and general anaesthesia.