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BBC-Oxford British Sign Language Dataset [article]

Samuel Albanie, Gül Varol, Liliane Momeni, Hannah Bull, Triantafyllos Afouras, Himel Chowdhury, Neil Fox, Bencie Woll, Rob Cooper, Andrew McParland, Andrew Zisserman
2021 arXiv   pre-print
In this work, we introduce the BBC-Oxford British Sign Language (BOBSL) dataset, a large-scale video collection of British Sign Language (BSL). BOBSL is an extended and publicly released dataset based on the BSL-1K dataset introduced in previous work. We describe the motivation for the dataset, together with statistics and available annotations. We conduct experiments to provide baselines for the tasks of sign recognition, sign language alignment, and sign language translation. Finally, we
more » ... ibe several strengths and limitations of the data from the perspectives of machine learning and linguistics, note sources of bias present in the dataset, and discuss potential applications of BOBSL in the context of sign language technology. The dataset is available at
arXiv:2111.03635v1 fatcat:jppn7hyuanccfprlui2uxyzqxq

Differential expression of single-cell RNA-seq data using Tweedie models [article]

Himel Mallick, Suvo Chatterjee, Shrabanti Chowdhury, Saptarshi Chatterjee, Ali Rahnavard, Stephanie C Hicks
2021 bioRxiv   pre-print
The performance of computational methods and software to identify differentially expressed genes in single-cell RNA-sequencing (scRNA-seq) has been shown to be influenced by several factors, including the choice of the normalization method used and the choice of the experimental platform (or library preparation protocol) to profile gene expression in individual cells. Currently, it is up to the practitioner to choose the most appropriate differential expression (DE) method out of over 100 DE
more » ... ls available to date, each relying on their own assumptions to model scRNA-seq data. Here, we propose to use generalized linear models with the Tweedie distribution that can flexibly capture a large dynamic range of observed scRNA-seq data across experimental platforms induced by heavy tails, sparsity, or different count distributions to model the technological variability in scRNA-seq expression profiles. We also propose a zero-inflated Tweedie model that allows zero probability mass to exceed a traditional Tweedie distribution to model zero-inflated scRNA-seq data with excessive zero counts. Using both synthetic and published plate- and droplet-based scRNA-seq datasets, we performed a systematic benchmark evaluation of more than 10 representative DE methods and demonstrate that our method (Tweedieverse) outperforms the state-of-the-art DE approaches across experimental platforms in terms of statistical power and false discovery rate control. Our open-source software (R package) is available at
doi:10.1101/2021.03.28.437378 fatcat:tvqhlvwigrgxndzxaxyak2oyhi

A Note on the Adaptive LASSO for Zero-Inflated Poisson Regression

Prithish Banerjee, Broti Garai, Himel Mallick, Shrabanti Chowdhury, Saptarshi Chatterjee
2018 Journal of Probability and Statistics  
Authors' Contributions Prithish Banerjee, Broti Garai, and Himel Mallick contributed equally to this work. Numerical Analysis  ... 
doi:10.1155/2018/2834183 fatcat:gnrbsmdx6jcbvfdm3tdwlazahi

Does Digitalization Matter for Grievance Redress Mechanism? An Analysis of the E-Government Procurement in the Local Government

Habibullah Mohammad Himel, Shuvra Chowdhury
2022 Macro Management & Public Policies  
Public procurement denotes the attainment of goods, works, or services required by governments through contracts. Public procurement is usually plagued with covert practices and exclusive forms of corruption in Bangladesh. The cost of development finance is much higher in public procurement than that of others in Bangladesh. There have been no unified rules or laws regarding government purchases since 2006. The Government of Bangladesh enacted its ever first act of public procurement, the
more » ... Procurement Act, 2006 (PPA, 2006), and the Public Procurement Rules, 2008 (PPR, 2008). The procurement entity must disseminate procurement information through electronic medium i.e. Electronic Government Procurement (hereinafter e-GP). Despite passing over an era since its enactment, the role of the PPA, 2006 remains seriously under-researched area, specifically there is no research on the issue of the grievance redress mechanisms. The study has been done using a qualitative case study methodology, backed by both primary and secondary documentary analysis. Based on empirical data, this paper explained the role of digitalization in the process of government procurement and depicted changes that have been brought by the implementation of e-GP in government purchases. However, it concluded that the grievance redress mechanism in the process of procurement is only existing in the policy papers which need mandatory implementation for a transparent and accountable governance system. Despite the significant changes and up-gradation in digital government procurement, it is hardly found that the GRM process is digitalized. And the mass tenderers are yet to be acquainted with the improvised system apart from the consistent efforts of the government.
doi:10.30564/mmpp.v3i4.4269 fatcat:ifgdjzhkmjcndbduxwoe62aihm

Effect of Filling Ratio on Heat Transfer Characteristics and Performance of a Closed Loop Pulsating Heat Pipe

Himel Barua, Mohammad Ali, Md. Nuruzzaman, M. Quamrul Islam, Chowdhury M. Feroz
2013 Procedia Engineering  
Thermal control is a generic need for any heat dissipation system. Heat pipes emerge as the most appropriate technology and most thermal effective solution due to their excellent heat transfer capability, heat transfer efficiency and structural simplicity. In many engineering applications higher heat flux is important. Two phase passive devices are proven solutions for modern microelectronics thermal management. This paper attempts to describe the heat transfer characteristics of closed loop
more » ... sating heat pipe (CLPHP) which are new entrants in the family of closed passive two phase heat transfer system. It also shows the comparison of thermal efficiency of CLPHP for different filling ratios with two different working fluids, water and ethanol. This device is a combination of lot of events and mechanisms like bubble nucleation, collapse and agglomeration, bubble pumping action, pressure and temperature perturbations, flow regime changes, dynamic instabilities, meta-stable non equilibrium conditions, flooding, bridging etc. All contribute towards the thermal performance of a device. But, such a complex operating mechanism is not understood well yet and the present state of the art cannot predict the required design parameters for a given task. The aim of research work presented in this paper is to better understand the heat transfer characteristics of these mechanisms through experimental investigations. Experiments are conducted on a CLPHP made of capillary tube of 2.2mm inner diameter. The heat transfer characteristics and the performance of the CLPHP are investigated for filling ratios of 100 %, 82.5%, 63%, 41.3% and 28%. The results indicate that the performance of this device changes with the changing of working fluid, filling ratios and heat input.
doi:10.1016/j.proeng.2013.03.093 fatcat:unv5dhi5xnfrpp2wjvfm7ady2u


Ahnaf Tahmid Nahian, Md.Tahmid Farhan Himel, Mahmudul Hasan, Nafeez Rahman, Chowdhury Akram Hossain
2019 International Journal of Engineering Applied Sciences and Technology  
Due to adverse effect of global warming and environmental pollution, future world is looking for decontaminated green energy resources for power generation. Economy of today's world is based on commercial activities and rapid industrialization. To ensure sustainable economic activity we need to fulfil the energy demand of equipment as well as to serve the automation technology of industrial sector. This results an excess pressure on electricity demand significantly. In spite of many
more » ... and proper technical support Bangladesh is looking forward to extract energy from its available renewable resources like other countries. Hybrid power system is a good choice to serve this purpose. This work mainly emphasis on the design and feasibility study of hybrid power system in the context of a particular garment industry, as the garments are the major source of foreign currency and employment in our country. The system is comprised of solar PV and diesel generator. Cost analysis and load optimization is done by HOMER Pro. System validity and advantages are also discussed in explicit way.
doi:10.33564/ijeast.2019.v04i08.001 fatcat:agw5pd6imbamzoespy77c4zbsu

A genetic association study detects haplotypes associated with obstructive heart defects

Ming Li, Mario A. Cleves, Himel Mallick, Stephen W. Erickson, Xinyu Tang, Todd G. Nick, Stewart L. Macleod, Charlotte A. Hobbs
2014 Human Genetics  
Our previous study also found maternal SNPs within MTHFS that are related to total plasma glutathione (GSH) levels (Chowdhury et al. 2012) .  ...  Previous work by our research group has also found associations between multiple maternal SNPs of MGMT and maternal metabolites, such as levels of glutamylcysteine (GluCys) and plasma folate (Chowdhury  ... 
doi:10.1007/s00439-014-1453-1 pmid:24894164 pmcid:PMC4313870 fatcat:zs3v7vrxi5ghlck5objw5pog5m

SeeHear: Signer Diarisation and a New Dataset

Samuel Albanie, Gul Varol, Liliane Momeni, Triantafyllos Afouras, Andrew Brown, Chuhan Zhang, Ernesto Coto, Necati Cihan Camgoz, Ben Saunders, Abhishek Dutta, Neil Fox, Richard Bowden (+2 others)
2021 ICASSP 2021 - 2021 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)  
The authors would like to thank Himel Chowdhury for his assistance with sign annotation.  ... 
doi:10.1109/icassp39728.2021.9414856 fatcat:s2omsizcgbeypbjq6s6ttjnhty

Literature Review on Close Loop Pulsating Heat Pipe at Different Filling Ratio #1

Gaurav Wandhare, Someshwar Bhakre
2017 International Engineering Research Journal   unpublished
The authors express their sincere appreciation for all the support provided. [2] Himel Barua, Mohammad Ali, Md. Nuruzzaman, M. REFRENCES Quamrul Islam, Chowdhury M.  ...  Himel Barua et al [2] . In 2013, investigate on Effect of filling ratio on heat transfer characteristics and performance of a closed loop pulsating heat pipe.  ... 

Regional Variation in the Prevalence of E. coli O157 in Cattle: A Meta-Analysis and Meta-Regression

Md. Zohorul Islam, Alfred Musekiwa, Kamrul Islam, Shahana Ahmed, Sharmin Chowdhury, Abdul Ahad, Paritosh Kumar Biswas, Qijing Zhang
2014 PLoS ONE  
They would like to thank Himel Barua to locate some full text articles. They would like to thank many other authors who supplied their paper by email.  ... 
doi:10.1371/journal.pone.0093299 pmid:24691253 pmcid:PMC3972218 fatcat:zlyi7z6bfrbwlarhjrb4qbkfuq

Aligning Subtitles in Sign Language Videos [article]

Hannah Bull, Triantafyllos Afouras, Gül Varol, Samuel Albanie, Liliane Momeni, Andrew Zisserman
2021 arXiv   pre-print
We thank Tom Monnier, Himel Chowdhury, Abhishek Dutta, Ashish Thandavan, Annelies Braffort, Michèle Gouiffès and Igor Garbuz for their help.  ... 
arXiv:2105.02877v1 fatcat:zxzwlu7e6ngwjfykbokrluh2em

Users' attitude and intention to use mobile financial services in Bangladesh: an empirical study

Md. Tanvir Alam Himel, Shahrin Ashraf, Tauhid Ahmed Bappy, Md Tanaz Abir, Md Khaled Morshed, Md. Nazmul Hossain
2021 South Asian Journal of Marketing  
The three indicators measuring PT were drawn from Ganguly et al. (2009) and Bappy and Chowdhury (2020) .  ... 
doi:10.1108/sajm-02-2021-0015 fatcat:wiuvflths5fdnashn4cjvnm3ua

Read and Attend: Temporal Localisation in Sign Language Videos [article]

Gül Varol, Liliane Momeni, Samuel Albanie, Triantafyllos Afouras, Andrew Zisserman
2021 arXiv   pre-print
We thank Cihan Camgöz, Himel Chowdhury and Abhishek Dutta for their help.  ... 
arXiv:2103.16481v1 fatcat:g2rzo4sc5faozaxrvc7i2p7y2q

Optical interrogation of sympathetic neuronal effects on macroscopic cardiomyocyte network dynamics

Rebecca-Ann B. Burton, Jakub Tomek, Christina M. Ambrosi, Hege E. Larsen, Amy R. Sharkey, Rebecca A. Capel, Alexander D. Corbett, Samuel Bilton, Aleksandra Klimas, Guy Stephens, Maegan Cremer, Samuel J. Bose (+9 others)
2020 iScience  
Epilepsy Curr. 4, 43-46.Dhillon, P.S., Gray, R., Kojodjojo, P., Jabr, R., Chowdhury, R.,Fry, C.H., and Peters, N.S. (2013).  ...  Himel, H.D.I.V., Bub, G., Lakireddy, P., and El-Sherif, N. (2012). Optical imaging of arrhythmias in the cardiomyocyte monolayer. Heart Rhythm 9, 2077-2082.  ... 
doi:10.1016/j.isci.2020.101334 pmid:32674058 pmcid:PMC7363704 fatcat:nksjqzw6hrf2xa5vrn4p25azva

Towards understanding the electrogram: theaoretical & experimental multiscale modelling of factors affecting action potential propagation in cardiac tissue

Eugene Tze-Yeng Chang, Jennifer Siggers, Spencer Sherwin, Nicholas Peters, British Heart Foundation ; Imperial College London
Image reproduced courtesy of Dr Rasheda Chowdhury.  ...  The protocol permitting electrophysiological recordings followed by immunocytochemistry on the same culture plate was devised by Dr R Chowdhury [Chowdhury, 2011] and reproduced below.  ...  The HL-1 cell line has been demonstrated experimentally as a novel in-vitro model for studying cell-cell electrical conduction and the effect of pharmacological agents on conduction slowing [Chowdhury  ... 
doi:10.25560/12792 fatcat:uu3alwgh5bcp3lguxrwfsmdcey
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