Energy Contents of Some Well-Known Solutions in Teleparallel Gravity

In the context of teleparallel equivalent to General Relativity, we study energy and its relevant quantities for some well-known black hole solutions. For this purpose, we use the Hamiltonian approach which gives reasonable and interesting results. We find that our results of energy exactly coincide with several prescriptions in General Relativity. This supports the claim that different energy-momentum prescriptions can give identical results for a given spacetime. We also evaluate energy-momentum flux of these solutions.Comment: 16 pages, accepted for publication in Astrophys. Space Sc

Reducing the environmental impact of surgery on a global scale: systematic review and co-prioritization with healthcare workers in 132 countries

Background Healthcare cannot achieve net-zero carbon without addressing operating theatres. The aim of this study was to prioritize feasible interventions to reduce the environmental impact of operating theatres. Methods This study adopted a four-phase Delphi consensus co-prioritization methodology. In phase 1, a systematic review of published interventions and global consultation of perioperative healthcare professionals were used to longlist interventions. In phase 2, iterative thematic analysis consolidated comparable interventions into a shortlist. In phase 3, the shortlist was co-prioritized based on patient and clinician views on acceptability, feasibility, and safety. In phase 4, ranked lists of interventions were presented by their relevance to high-income countries and low–middle-income countries. Results In phase 1, 43 interventions were identified, which had low uptake in practice according to 3042 professionals globally. In phase 2, a shortlist of 15 intervention domains was generated. In phase 3, interventions were deemed acceptable for more than 90 per cent of patients except for reducing general anaesthesia (84 per cent) and re-sterilization of ‘single-use’ consumables (86 per cent). In phase 4, the top three shortlisted interventions for high-income countries were: introducing recycling; reducing use of anaesthetic gases; and appropriate clinical waste processing. In phase 4, the top three shortlisted interventions for low–middle-income countries were: introducing reusable surgical devices; reducing use of consumables; and reducing the use of general anaesthesia. Conclusion This is a step toward environmentally sustainable operating environments with actionable interventions applicable to both high– and low–middle–income countries

The first record of pectoral and pelvic fins deformity in the freshwater blenny Salaria fluviatilis (Pisces: Blenniidae) collected from Kızılırmak River, Turkey

The freshwater blenny Salaria fluviatilis (Asso y del Rio, 1801) is a freshwater species that favors demersal environments. Individuals of this species live in rivers and brooks of Europe, North Africa and Israel. Three specimens of S. fluviatilis (TL 80.82 mm, 60.98 mm and 64.14 mm) collected from Kızılırmak River – Kesikköprü Bridge, Turkey during July 2021 showed deformities in both pectoral and pelvic fins. Degeneration was noted in the pectoral fin rays particularly the last ventral two soft rays (soft ray no. 13 and 14 counting from dorsal to ventral). They also look smaller than those in the normal specimen do. The degeneration in the soft ray no. 13 is less severe than soft ray no. 14. The x-ray of the abnormal specimen showed no other pectoral fin rays were deformed and the pectoral girdle was normal. In both specimens of S. fluviatilis that showed pelvic fin rays degeneration, the whole left pelvic fin and the right pelvic fin were completely degenerated and no soft rays are present. The possible causative factors of these anomalies are discussed. Our finding highlights the need for closer monitoring of the freshwater environment and for the identification of the specific factor that caused these abnormalities. © 2022 The authors