Browsing by Author "Das, Arnob"

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Assessing Seismicity in Bangladesh: An Application of Guttenberg-Richter Relationship and Spectral Analysis
(Taylor & Francis Group, 2023-08-21) Islam, Abu Reza Md. Towfiqul; Akter, Mst. Yeasmin; Amanat, Sumaia; Alam, Edris; Sultana, Mst. Laila; Shahid, Shamsuddin; Das, Arnob; Peu, Susmita Datta; Mallick, Javed
Bangladesh has a high risk of earthquakes because the Dauki, Jamuna, and Chittagong-Myanmar faults are still active. However, the assessment of seismicity remains a big challenge due to the complex geologic setting of Bangladesh. This study employed the Guttenberg-Richter relationship and the spectral models to assess and analyze the earthquake conditions in Bangladesh. Besides, an instrumental earthquake catalogue, obtained from the Bangladesh Meteorological Department (BMD), covering 1985–2017, is established. The results revealed that the Guttenberg-Richter constants of a and b were 2.981 and 0.392, which propagated a strain release from 1992 to 2017. The spectral model analyses, e.g. wavelet transform (WT), short-time Fourier transformation (STFT), and multitaper model (MTM), demonstrated the magnitude and strain release anomalies of the same magnitude ranging from 4.8 to 5.7, indicating the probable precursor of an upcoming earthquake. Notably, magnitudes have been running around 4.5–5.8, which may act as a signal to major earthquakes that have not been evident before. The proposed models allowed for the completion of the Bangladesh earthquake catalogue and provided a platform for future seismicity assessment and earthquake probability analysis. These results should be considered in determining how likely earthquakes are to happen in an area or region.
Employee recruitment and development process at maf Shoes Ltd.
(BRAC University, 1/17/2016) Das, Arnob; Chowdhury, Mr. Mohammad Noman Hossain
As part of my MBA program, I have completed my three months internship program from a well-known industry named “maf Shoes Ltd.”. During my internship period in “maf Shoes Ltd.”, I have gained valuable knowledge and experience in the field of Human Resource. So based on my learning and experience from the organization I have completed my internship report on the recruitment and selection activities of “maf Shoes Ltd.”. In this paper I have tried to focus and analyze the core Human Resource functions of “maf Shoes Ltd.” and what kind of value added services they are providing to their employees. In the report I have discussed what kind of activities I have done describes in details. The services include CV screening, Data entry, Job posting, Assist in interviews, Help candidate in the time of joining etc. In CV screening I have basically discussed about the Executive Search of candidates from BD jobs or other relevant sources .In maf joining process is very strict and confidential. In case of training I have tried to explain the different area of recruitment and selection. In recommendations how the industry can improve and also give some suggestions. In this report the problems, scope, limitations and various analyses are also done. In this report I have also tried to analyze the benefits of these services as well as my learning from the organization. From my personal view the learning aspect was fruitful and the experience there will help me in the future. I have learnt many aspects of HR, working with different sections of the company. Mainly working with recruitment and selection section of the company was a great learning opportunity.
Personal Protective Equipment-Derived Pollution During COVID-19 Era: A Critical Review of Ecotoxicology Impacts, Intervention Strategies, and Future Challenges
(Elsevier, 2023-05-13) Hasan, Mehedi; Islam, Abu Reza Md. Towfiqul; Jion, Most. Mastura Munia Farjana; Rahman, Md. Naimur; Peu, Susmita Datta; Das, Arnob; Bari, A.B.M. Mainul; Islam, Md. Saiful; Pal, Subodh Chandra; Islam, Aznarul; Choudhury, Tasrina Rabia; Rakib, Md. Refat Jahan; Idris, Abubakr M.; Malafaia, Guilherme
During the COVID-19 pandemic, people used personal protective equipment (PPE) to lessen the spread of the virus. The release of microplastics (MPs) from discarded PPE is a new threat to the long-term health of the environment and poses challenges that are not yet clear. PPE-derived MPs have been found in multi-environmental compartments, e.g., water, sediments, air, and soil across the Bay of Bengal (BoB). As COVID-19 spreads, healthcare facilities use more plastic PPE, polluting aquatic ecosystems. Excessive PPE use releases MPs into the ecosystem, which aquatic organisms ingest, distressing the food chain and possibly causing ongoing health problems in humans. Thus, post-COVID-19 sustainability depends on proper intervention strategies for PPE waste, which have received scholarly interest. Although many studies have investigated PPE-induced MPs pollution in the BoB countries (e.g., India, Bangladesh, Sri Lanka, and Myanmar), the ecotoxicity impacts, intervention strategies, and future challenges of PPE-derived waste have largely gone unnoticed. Our study presents a critical literature review covering the ecotoxicity impacts, intervention strategies, and future challenges across the BoB countries (e.g., India (162,034.45 tons), Bangladesh (67,996 tons), Sri Lanka (35,707.95 tons), and Myanmar (22,593.5 tons). The ecotoxicity impacts of PPE-derived MPs on human health and other environmental compartments are critically addressed. The review's findings infer a gap in the 5R (Reduce, Reuse, Recycle, Redesign, and Restructure) Strategy's implementation in the BoB coastal regions, hindering the achievement of UN SDG-12. Despite widespread research advancements in the BoB, many questions about PPE-derived MPs pollution from the perspective of the COVID-19 era still need to be answered. In response to the post-COVID-19 environmental remediation concerns, this study highlights the present research gaps and suggests new research directions considering the current MPs' research advancements on COVID-related PPE waste. Finally, the review suggests a framework for proper intervention strategies for reducing and monitoring PPE-derived MPs pollution in the BoB countries.