Search

Abstract We examine the geometrical differences between the black hole (BH) and naked singularity (NS) or superspinar via Lense–Thirring (LT) precession in spinning modified-gravity (MOG). For BH case, we show that the LT precession frequency ( $$\Omega _{LT}$$ Ω LT ) along the pole is proportional to the angular-momentum (J) parameter or spin parameter (a) and is inversely proportional to the cubic value of radial distance parameter, and also governed by Eq. (1). Along the equatorial plane it is governed by Eq. (2). While for superspinar, we show that the LT precession frequency is inversely proportional to the cubic value of the spin parameter and it decreases with distance by MOG parameter as derived in Eq. (3) at the pole and in the limit $$a>>r$$ a > > r (where a is spin parameter). For $$\theta \ne \frac{\pi }{2}$$ θ ≠ π 2 and in the superspinar limit, the spin frequency varies as $$\Omega _{LT}\propto \frac{1}{a^3\cos ^4\theta }$$ Ω LT ∝ 1 a 3 cos 4 θ and by Eq. (38).

Introduction: Research has shown that learning may be optimised by synchronising the learning environment with the learning style preferences of students. First-year medical students face immense stress as they adapt to a new learning environment and curriculum at the onset of their medical career. The simultaneous use of two supplementary learning styles questionnaires, namely, the Visual-Aural/Auditory-Read/Write-Kinesthetic (VARK) questionnaire and the Vermunt Inventory of Learning Styles (Vermunt ILS), would provide detailed knowledge of their instructional preferences, information processing, and cognitive personality learning styles. Judicious use of such information at this stage may guide them towards improved learning and higher academic achievement. Aim: To study the association between learning styles and academic achievements in first-year professional MBBS students of a medical college. Materials and Methods: A cross-sectional study was conducted at Medical College, Kolkata, West Bengal, India over the duration of 10 months from August 2021 to June 2022. Online surveys of 250 first-year MBBS students’ learning styles were conducted using the VARK questionnaire and Vermunt ILS, and the marks of three internal assessment examinations were collected. The data was entered into Microsoft Excel. Group as well as individual scores were analysed, and Pearson’s Chi-square test was used to determine the association between the students’ learning styles and their academic achievement. A p-value of

Background: Complete hydatidiform mole affects women in their reproductive age. About 15-20% develops persistent molar gestational trophoblastic neoplasia (GTN), which is linked with delayed (beyond 56 days) normalization of serum βHCG after surgical evacuation. Objective: The objective of the article is to shorten the duration of normalization time of βHCG with single-dose methotrexate injection in women with high risk complete hydatidiform mole (CHM) after suction evacuation. Methods: Total 76 women with CHM were randomized into intervention and control groups. In the intervention arm (n = 34) women received single dose 100 mg intramuscular methotrexate injection post evacuation and the control group (n = 42) had standard care. Surveillance was done in both groups at two weeks intervals for next six months and duration of normalization of βHCG level was recorded. Results: Total 94.7% women completed follow-up. Mean of normalization time was significantly lower in the intervention group compared to controls (9.7 weeks versus 14.7 week; P < 0.01). Time to event curve showed significantly earlier cumulative normalization time for the intervention group. Conclusion: Single-dose 100 mg methotrexate injection is a low-cost, simple intervention to help one out of three women with CHM with high-risk features to achieve normalization of βHCG within 56 days. This might be helpful for people in resource-poor countries where adherence to prolonged surveillance is poor.