ORCID Profile
0000-0003-0170-7182
Current Organisations
University of Oxford
,
Directorate General of Health Services, Dhaka, Attached- Magura Medical College
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Publications
Global quieting of high-frequency seismic noise due to COVID-19 pandemic lockdown measures
Publisher: American Association for the Advancement of Science (AAAS)
Date: 11-09-2020
Abstract: Seismic background noise dramatically decreased as a result of lockdown measures in place for mitigating the spread of COVID-19.
Divergent trajectories of antiviral memory after SARS-CoV-2 infection
Publisher: Springer Science and Business Media LLC
Date: 10-03-2022
DOI: 10.1038/S41467-022-28898-1
Abstract: The trajectories of acquired immunity to severe acute respiratory syndrome coronavirus 2 infection are not fully understood. We present a detailed longitudinal cohort study of UK healthcare workers prior to vaccination, presenting April-June 2020 with asymptomatic or symptomatic infection. Here we show a highly variable range of responses, some of which (T cell interferon-gamma ELISpot, N-specific antibody) wane over time, while others (spike-specific antibody, B cell memory ELISpot) are stable. We use integrative analysis and a machine-learning approach (SIMON - Sequential Iterative Modeling OverNight) to explore this heterogeneity. We identify a subgroup of participants with higher antibody responses and interferon-gamma ELISpot T cell responses, and a robust trajectory for longer term immunity associates with higher levels of neutralising antibodies against the infecting (Victoria) strain and also against variants B.1.1.7 (alpha) and B.1.351 (beta). These variable trajectories following early priming may define subsequent protection from severe disease from novel variants.
AlpArray in Hungary: temporary and permanent seismological networks in the transition zone between the Eastern Alps and the Pannonian basin
Publisher: Springer Science and Business Media LLC
Date: 20-03-2018
Quantification of electrical properties of deep crustal rocks based on their mineral modal proportion, fabric, and pressure-temperature conditions
Publisher: Copernicus GmbH
Date: 15-05-2023
DOI: 10.5194/EGUSPHERE-EGU23-5997
Abstract: Electrical resistivity tomography and electromagnetic inverse modelling are particularly useful to explore orogenic systems because the most important conductive components of rock masses are economically-significant minerals (semi-metals like graphite, and semi-conducting minerals like sulphides), as well as certain clays and permeating saline fluids. Despite the efficiency of electrical measurements, anisotropic properties of the crust, which affect almost all acquired data, may lead to serious misinterpretation of the subsurface geology if they are ignored during data analysis. Understanding the geological causes of electrical anisotropy and heterogeneity, and considering their influence in field-scale electrical measurements, can provide crucial information on the crustal architecture, pore fluid network, as well as revealing the internal structure of fault zones, and increasing the accuracy of location of critical mineral deposits. To this end, we aim to quantify the electrical properties of mid- to lower-crustal metamorphic and magmatic lithologies based on their micro- to macrostructures, conductive components and fluid contents as measured by laboratory methods. Our research also contributes to, and advances, the likely outcomes of the ICDP-supported project DIVE (Drilling the Ivrea-Verbano ZonE). DIVE is currently exploring the hidden portions of the continental lower crust and crust-to-mantle transition zone of the Ivrea-Verbano Zone (Western Alps, Italy) in two boreholes at the sites of Megolo (DT-1a) and Ornavasso (DT-1b), separated by & km distance in Val d& #8217 Ossola. The first DIVE borehole, DT-1b, was completed in December 2022, reaching a depth of 578.5 metres, and rock cores of metapelite, gneiss, hibolite, migmatite, and pegmatite were recovered. Some drillcores contained a range of potentially conductive lithologies, including sulphide- and graphite-bearing metapelites. In this research we are measuring electrical conductivity on a representative benchmark suite of bedrock outcrop s les from the region around the DIVE boreholes at elevated pressure and temperature. We are currently characterising the microstructural arrangement and distribution of conductive phases within these s les by electron beam methods. To properly understand electrical property measurements of the natural s les we determine the contributions of each key conductive phase (graphite and sulphides). The bulk resistivity of a mixture of quartz+10% graphite, which was synthesized in a solid& #8211 medium piston-cylinder apparatus, at temperature of 22.5 & #176 C and pressure of 0.5 GPa, was found to be 1 & #8486 .m. No change in bulk resistivity was observed with increasing temperature up to 1000 & #176 C. We will present the results of additional tests to be undertaken between January and April 2023 at this conference. Our data will be employed in interpretation of wireline electrical logs and borehole-to-surface electrical surveys from DT-1a and DT-1b.
Likelihood of infectious diseases due to lack of exclusive breastfeeding among infants in Bangladesh
Publisher: Public Library of Science (PLoS)
Date: 16-02-2022
DOI: 10.1371/JOURNAL.PONE.0263890
Abstract: Bangladesh is a South Asian developing country trying to achieve the Sustainable Development Goals (SDG)-3 and the objective of the Rural Electrification Board (REB) regarding child mortality. Infectious diseases are leading causes of child mortality, and lack of exclusive breastfeeding (EBF) among infants aged 0–6 months increases child morbidity and mortality from various infectious diseases in developing countries. However, as per existing literature, no study has been conducted yet to determine the lack of EBF practice effect on child mortality in Bangladesh. With this backdrop, the authors intend to measure the likelihood of infectious diseases due to the lack of EBF of infants aged 0–6 months in Bangladesh. This study used Bangladesh Demographic and Health Survey (BDHS) data over 1996–97 to 2017–18. The mothers of infants aged 0–6 months who were willingly participated in the BDHSs were considered to include in our analysis. Initially, there were 9,133 cases in the combined dataset. After filtering, there were 5,724 cases in the final dataset. We have considered diarrhea (D), acute respiratory infection (ARI) separately as well as the presence of either D or ARI or both and named as CoDARI as outcome variables. This study used both graphical and statistical techniques (Chi-square test, Wald test, and logistic regression) to analyze the data. The odds ratio (OR) and 95% confidence interval (CI) were used to quantify the likelihood of infectious diseases due to lack of EBF practice and its elasticity, respectively. The EBF practice got a conspicuous increasing trend, but the prevalence of infectious diseases was declined from 0 to 3 months of age of infants, whereas an inverse scenario is observed between 4–6 months. The significance of that inverse relationship was confirmed by p-value corresponding to the chi-square test and the Wald test of the adjusted regression coefficients after adjusting the associated factor’s effect on infectious diseases. The adjusted ORs also concluded that the lack of EBF practice up to six months of age could enhance the risk of D, ARI, and CoDARI by 2.11 [95% CI: 1.56–2.85], 1.43 [95% CI: 1.28–1.60], and 1.48 [95% CI: 1.32–1.66] times higher, respectively. Findings of this study emphasize the importance of EBF up to six months of age of infants against diarrhea and ARI specific morbidity and mortality. Our results also agreed to the recommendation of the World Health Organization (WHO), United Nations International Children’s Emergency Fund (UNICEF), American Academy of Pediatrics (AAP), American Academy of Family Physicians (AAFP), and National Nutrition Programme of Ethiopia (NNPE) that the EBF practice for the first six months of age could be a best, cost-effective, long-lasting natural preventive way to reduce the child morbidity and mortality due to infectious diseases in developing countries. Therefore, findings would help policymakers ensuring the achievement target of REB and SDG-3 associated with the health sector in Bangladesh.
Related Organisations
University Of Oxford
Location: United Kingdom of Great Britain and Northern Ireland
Directorate General Of Health Services, Dhaka, Attached- Magura Medical College
Location: Bangladesh
Government Of The People's Republic Of Bangladesh
Location: Bangladesh
Related Funding Activities
No related grants have been discovered for MOHAMMAD ALI.