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A Local Macroscopic Conservative(LoMaC)Low Rank Tensor Method with the Discontinuous Galerkin Method for the Vlasov Dynamics

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Communications on Applied Mathematics and Computation 2024年第1期6卷 550-575页

作者： Wei Guo Jannatul ferdous Ema Jing-Mei Qiu Department of Mathematics and Statistics Texas Tech UniversityLubbockTX70409USA Department of Mathematical Sciences University of DelawareNewarkDE19716USA

In this paper,we propose a novel Local Macroscopic Conservative(LoMaC)low rank tensor method with discontinuous Galerkin(DG)discretization for the physical and phase spaces for simulating the Vlasov-Poisson(VP)*** LoMaC property refers to the exact local conservation of macroscopic mass,momentum,and energy at the discrete *** recently developed LoMaC low rank tensor algorithm(arXiv:2207.00518)simultaneously evolves the macroscopic conservation laws of mass,momentum,and energy using the kinetic flux vector splitting;then the LoMaC property is realized by projecting the low rank kinetic solution onto a subspace that shares the same macroscopic *** paper is a generalization of our previous work,but with DG discretization to take advantage of its compactness and flexibility in handling boundary conditions and its superior accuracy in the long *** algorithm is developed in a similar fashion as that for a finite difference scheme,by observing that the DG method can be viewed equivalently in a nodal *** the nodal DG method,assuming a tensorized computational grid,one will be able to(i)derive differentiation matrices for different nodal points based on a DG upwind discretization of transport terms,and(ii)define a weighted inner product space based on the nodal DG grid *** algorithm can be extended to the high dimensional problems by hierarchical Tucker(HT)decomposition of solution tensors and a corresponding conservative projection *** a similar spirit,the algorithm can be extended to DG methods on nodal points of an unstructured mesh,or to other types of discretization,e.g.,the spectral method in velocity *** numerical results are performed to showcase the efficacy of the method.

关键词： Hierarchical Tucker(HT)decomposition Conservative SVD Energy conservation Discontinuous Galerkin(DG)method

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Synergistic enhancement of photocatalytic and antimicrobial efficacy of nitrogen and erbium co-doped ZnO nanoparticles

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Journal of Rare Earths 2024年第5期42卷 859-868,I0002页

作者： Sudipta Mondal Moniruzzaman Jamal Sikder Ashikuzzaman Ayon Md Jannatul ferdous Anik Md Muktadir Billah Department of Materials and Metallurgical Engineering Bangladesh University of Engineering and TechnologyDhaka1000Bangladesh School of Materials Engineering Purdue UniversityWest LafayetteIN47907USA Department of Materials Science and Engineering University of CaliforniaBerkeleyCA94720USA Department of Materials Science and Engineering Northwestern UniversityEvanstonI28USA

Using the chemical co-precipitation approach,a series of nitrogen(N) and erbium(Er) co-doped ZnO nanoparticles(NPs) was effectively synthesized to enhance the photocatalytic and antibacterial *** characterization techniques,including X-ray diffraction(XRD),X-ray photoelectron spectro scopy(XPS),scanning electron microscopy(SEM),UV-vis,and photoluminescence(PL) spectroscopy,were carried out to validate the evaluated photocatalytic and antibacterial *** analysis confirms the pure wurtzite ZnO phase without the presence of any secondary *** analysis confirms the succe ssful incorporation of nitrogen and erbium into the ZnO *** optical bandgap of ZnO calculated from UV-vis spectroscopy shows a redshift after Er-N co-doping,with the lowest bandgap of 3.215 eV calculated for Zn_(0.97)Er_(0.03)N_(0.01)O_(0.99) *** images demonstrate the formation of nanorods after N-Er co-doping,followed by gradually increase d rod diameter and length after N-Er ***,the photocatalytic activities of ZnO samples we re measured by their ability to facilitate the photodegradation of Rhodamine B under UV *** with 1 mol% N doping exhibits 88% photodegradation of RhB under UV light within 360 min,and the photodegradation and antibacterial activity are greatly improved with Er *** fact,3 mol% Er-1 mol% N doped ZnO NPs demonstrate the highest photocatalytic activity,with approximately 96% degradation after 360 min,as well as superior antibacterial activity against Staphylococcus aureus(Gram-positive bacteria) and Pseudomonas aeruginosa(Gram-negative bacteria) with the highest zone of inhibition(ZOI) of 16 nm,due to nanorod formation,increased reactive oxygen species(ROS),and decreased electron-hole recombination,as validated by SEM,XPS,and PL spectroscopy.

关键词： Chemical co-precipitation Co-doping Bandgap Photocatalysis Rare earths Antimicrobial

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Minor Gynecologic Surgery: A Review of the Training Experience and Skill Building Opportunities for Providers in Low and Middle Income Countries

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Open Journal of Obstetrics and Gynecology 2014年第7期4卷 432-444页

作者： Rachel Marie Clark Leslie Siriya Bradford Jessica Opoku-Anane Joseph Ngonzi ferdous islam Mithila Faruque Annekathryn Goodman Department of Obstetrics and Gynecology Birdem Hospital Dhaka Bangladesh Department of Obstetrics and Gynecology Dhaka Medical College Hospital Dhaka Bangladesh Department of Obstetrics and Gynecology Division of Gynecology Oncology Massachusetts General Hospital Boston USA Department of Obstetrics and Gynecology Division of Gynecology Oncology University of Massachusetts Worcester USA Department of Obstetrics and Gynecology George Washington University Hospital Washington D.C. USA Department of Obstetrics and Gynecology Mbarara University Teaching Hospital Mbarara Uganda

Purpose: Minor gynecologic surgery is the cornerstone of gynecologic evaluation and intervention in countries with a well-established medical infrastructure. Surgical training and exposure to minor procedures are not available in low and middle-income countries due to the complex challenges of patient delay and lack of access to healthcare, physician shortages, and the lack of ancillary services such as pathology and radiology. This paper reviews current training statistics, the international literature on minor gynecologic surgery and training strategies. Methods: PubMed searches using MESH terms cone biopsy, dilation and curettage, and loop electrosurgical excision procedure were performed. Statistics of minor surgical procedures among US Obstetrics and Gynecology Residency programs were tabulated. We then searched for data of training programs and surgical statistics in low resource countries. Results:Dilation and curettage is the most common minor gynecologic procedure in the United States but is performed with significantly lower frequency in low and middle-income countries. The most common procedure for the treatment of preinvasive disease was cryotherapy followed by loop electrosurgical excision procedure. There was no information about minor surgical procedures performed in hospitals in low and middle-income countries. Statistics from four-year American training programs showed an average of 209 minor cervical procedures performed annually. Conclusion: Expertise in minor gynecologic procedures is vital and requires the development of both adequate training programs and local medical infrastructure. Strategies for training in minor surgery for providers in low and middle-income countries include online curriculums, mentored relationships with senior physicians, and simulation models.

关键词： Minor Surgery Gynecology Dilation and Curettage Hysteroscopy Cone Biopsy Residency Training LMICs

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Multi-species probiotics enhance survival,growth,intestinal microbiota and disease resistance of rohu(Labeo rohita)larvae

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Water Biology and Security 2024年第1期3卷 71-79页

作者： Zannatul ferdous Md Kabir Hossain Md Hadiuzzaman SMRafiquzzaman KM Abdul Halim Tanvir Rahman Md Ali Reza Faruk Zulhisyam Abdul Kari Md Shahjahan Laboratory of Fish Ecophysiology Department of Fisheries ManagementBangladesh Agricultural UniversityMymensingh2202Bangladesh Department of Aquaculture Bangladesh Agricultural UniversityMymensingh2202Bangladesh Department of Fisheries Matshoy BhabanDhakaBangladesh Department of Fisheries Biology&Aquatic Environment Bangabandhu Sheikh Mujibur Rahman Agricultural UniversityGazipur1706Bangladesh Department of Agricultural Sciences Faculty of Agro-Based IndustryUniversiti Malaysia KelantanJeli Campus17600JeliKelantanMalaysia

Multi-strain probiotics provide the most dependable approaches to improve health,immune response,and disease resistance in farmed *** the present study,we examined the effects of multi-species probiotics on the survival,growth,immune response,and disease resistance of rohu(Labeo rohita)*** hatched larvae from the day of first feeding(average weight of 0.003 g)were reared with multi-species probiotics having a combination of Bacillus subtilis(109 colony forming units(cfu)/mL)and Lactobacillus spp.(Lactobacillus plantarum,Lactobacillus buchneri-1011 cfu/mL)in water containing doses of 0(control-C),0.5 mL/L(treatment 1-T1),and 1.0 mL/L(treatment 2-T2)in triplicates for 90 *** the experiment,a challenge test was performed to assess the fish's resistance to pathogenic Aeromonas *** higher survival was recorded in larvae of treated groups(87%in T2 and 79%in T1)compared to the control(62%).Significantly higher growth performance(weight gain and specific growth rate—SGR)was shown by the probiotic-treated larval groups compared to the *** supplementation resulted in significantly higher counts of total viable colony(TVC)and lactic acid bacteria(LAB)in the *** immunological parameters(mucosal fold fattening,goblet cell abundance,expansion of lamina propria and enterocytes)of the gut were significantly better in probiotic-treated *** liver of treated fish showed irregular shape nuclei turning into regular shape and reducing spaces between the hepatic ***-treated fish had the highest post-challenge survival rate(90%)against *** *** erythrocytes of challenged fish treated with probiotics had significantly lower frequencies of various nuclear and cellular *** findings suggest that multi-species probiotic supplements could improve the survival,growth,health status,and immune response of rohu in the early stages of its development.

关键词： Aquaculture Disease resistance Immunity Labeo rohita Probiotics

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Neutrophil Count, Platelet Indices, CRP and Their Association with Disease Activity of Juvenile Idiopathic Arthritis (JIA): A Study from Bangladesh

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Open Journal of Rheumatology and Autoimmune Diseases 2023年第1期13卷 41-49页

作者： Sanjida Pervin Sonia Ellen ferdous Mohammad Imnul islam Shahana Akhter Rahman Medical Officer National Institute of Cardiovascular Diseases Sher E Bangla Nagar Dhaka Bangladesh Department of Paediatrics Bangabandhu Sheikh Mujib Medical University Dhaka Bangladesh

Background: Chronic inflammation of the joints in JIA patients is associated with raised levels of serum inflammatory biomarkers, which vary according to disease activity. Neutrophil count, platelet count, mean platelet volume (MPV), platelet distribution width (PDW), ESR and CRP are the essential markers to evaluate the disease activity status of JIA patients. Objectives: To assess neutrophil count, platelet count, MPV, PDW, CRP and Juvenile Arthritis Disease Activity Score (JADAS) in JIA patients and determine their association at the initial visit and six months after treatment. Methods: This prospective observational study was conducted from March 2019 to December 2020 in the department of paediatrics, Bangabandhu Sheikh Mujib Medical University, Dhaka, Bangladesh. Fifty newly diagnosed JIA cases fulfilling the ILAR classification criteria were included in the study. Disease activity was assessed by JADAS 27. JADAS 27 and inflammatory biomarkers were measured at the initial visit and six months of treatment and these were compared. Results: Mean neutrophil count, platelet count, and CRP significantly decreased at follow-up after six months of treatment. MPV and PDW were increased after six months compared to the initial visit, and the change was significant. Mean JADAS 27 also decreased significantly at follow-up. Neutrophil count, Platelet indices and CRP had a significant association with JADAS 27. Conclusion: In this study, neutrophil count, platelet indices, and CRP after six months of treatment were improved. A significant association of JADAS 27 was found with platelet indices, neutrophil count and CRP.

关键词： Arthritis Chronic Inflammation Inflammatory Biomarkers

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Phonon transmission of vacancy disordered armchair silicene nanoribbon

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Optoelectronics Letters 2021年第8期17卷 454-458页

作者： Ashraful Hossain Howlader Md.Sherajul islam Naim ferdous School of Physics The University of SydneyNew South Wales 2006Australia Department of Electrical and Electronic Engineering Khulna University of Engineering and TechnologyKhulna 9203Bangladesh Department of Electrical and Electronic Engineering Bangabandhu Sheikh Mujibur Rahman Science and Technology UniversityGopalganj 8100Bangladesh

This work demonstrates the atomic vacancy effects on the phonon properties of armchair silicene nanoribbon in a step by step process for the first *** phonon localization effect figures out the fact that vacancies cause to high-energy phonons become localized,whereas low-energy phonons can easily *** vacancy reduces high-energy phonon transmission severely compared to low-energy *** is also found from phonon density of states that high-frequency phonons soften towards the low-frequency *** simulated phonon bandstructure verifies that most of the phonon branches transform to a nondegenerate state from a degenerate state and shifted toward a lower frequency regime due to the presence of *** overall consequences of atomic vacancies on the phonon thermal conductance disclose the reality that only a few atomic vacancies result in a vital reduction of phonon thermal *** addition,the entropy of the disordered system is investigated.

关键词： phonon vacancy disordered

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Deep learning based classification of sheep behaviour from accelerometer data with imbalance

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Information Processing in Agriculture 2023年第3期10卷 377-390页

作者： Kirk E.Turner Andrew Thompson Ian Harris Mark Ferguson ferdous Sohel Discipline of Information Technology Murdoch UniversityMurdochWA 6150Australia Centre for Crop and Food Innovation Food Futures InstituteMurdoch UniversityMurdochWA 6150Australia College of Science HealthEngineering and EducationMurdoch UniversityMurdochWA 6150Australia neXtgen Agri Saint MartinsChristchurch 8022New Zealand

Classification of sheep behaviour from a sequence of tri-axial accelerometer data has the potential to enhance sheep *** behaviour is inherently imbalanced(e.g.,more ruminating than walking)resulting in underperforming classification for the minority activities which hold *** works have not addressed class imbalance and use traditional machine learning techniques,e.g.,Random Forest(RF).We investigated Deep Learning(DL)models,namely,Long Short Term Memory(LSTM)and Bidirectional LSTM(BLSTM),appropriate for sequential data,from imbalanced *** data sets were collected in normal grazing conditions using jaw-mounted and earmounted *** to this study,alongside typical single classes,e.g.,walking,depending on the behaviours,data samples were labelled with compound classes,e.g.,walking_-*** number of steps a sheep performed in the observed 10 s time window was also recorded and incorporated in the *** designed several multi-class classification studies with imbalance being addressed using synthetic *** models achieved superior performance to traditional ML models,especially with augmented data(e.g.,4-Class+Steps:LSTM 88.0%,RF 82.5%).DL methods showed superior generalisability on unseen sheep(i.e.,F1-score:BLSTM 0.84,LSTM 0.83,RF 0.65).LSTM,BLSTM and RF achieved sub-millisecond average inference time,making them suitable for real-time *** results demonstrate the effectiveness of DL models for sheep behaviour classification in grazing *** results also demonstrate the DL techniques can generalise across different *** study presents a strong foundation of the development of such models for real-time animal monitoring.

关键词： Sheep behaviour classification Data synthesis Class imbalance Grazing sheep

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A survey of image-based computational learning techniques for frost detection in plants

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Information Processing in Agriculture 2023年第2期10卷 164-191页

作者： Sayma Shammi ferdous Sohel Dean Diepeveen Sebastian Zander Michael G.K.Jones Discipline of Information Technology Murdoch UniversityMurdochWA 6150Australia Centre for Crop and Food Innovation Food Futures InstituteMurdoch UniversityMurdochWA 6150Australia Department of Primary Industries and Regional Development Western AustraliaSouth PerthWA 6151Australia

Frost damage is one of the major concerns for crop growers as it can impact the growth of the plants and hence,*** detection of frost can help farmers mitigating its *** the past,frost detection was a manual or visual ***-based techniques are increasingly being used to understand frost development in plants and automatic assessment of damage resulting from *** research presents a comprehensive survey of the state-of the-art methods applied to detect and analyse frost stress in *** identify three broad computational learning approaches i.e.,statistical,traditional machine learning and deep learning,applied to images to detect and analyse frost in *** propose a novel taxonomy to classify the existing studies based on several *** taxonomy has been developed to classify the major characteristics of a significant body of published *** this survey,we profile 80 relevant papers based on the proposed *** thoroughly analyse and discuss the techniques used in the various approaches,i.e.,data acquisition,data preparation,feature extraction,computational learning,and *** summarise the current challenges and discuss the opportunities for future research and development in this area including in-field advanced artificial intelligence systems for real-time frost monitoring.

关键词： Frost Cold stress Machine learning Image analysis Crop Plant

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Development of chemometric model for characterization of non-wood by FT-NIR data

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Journal of Bioresources and Bioproducts 2020年第3期5卷 196-203页

作者： Mohammad Nashir Uddin Taslima ferdous Zahidul islam M.Sarwar Jahan M.A.Quaiyyum BCSIR Laboratories DhakaBangladesh Council of Scientific and Industrial Research(BCSIR)Dhaka 1205Bangladesh Department of Applied Chemistry and Chemical Engineering University of DhakaDhaka 1000Bangladesh

In this study,a model for prediction of lignocellulose components of agricultural residues has been developed with Fourier Transformed Near Infrared(FT-NIR)spectroscopy *** calibration techniques(Principal Component Regression(PCR)and Partial Least Square Regression(PLSR))were assessed for prediction of lignin,holocellulose,α-cellulose,pentosan and ash,and found the PLSR better for lignin,holocellulose andα-*** PCR also produced better results for quantification of pentosan and *** range(7000-5000 cm^(-1))showed more informative than other parts of the spectral *** PLSR showed maximum value of R^(2)(R^(2)=0.91%)for prediction of *** the prediction of pentosan,the PCR was better(R^(2)=0.68%).The PCR also showed better results(R^(2)=86%)for quantification of *** determine amount of lignin,the PLSR was the best(R^(2)=0.83%)when the spectral data were de-trained and smoothed with Savitzky-Golay(S-G)filtering *** prediction ofα-cellulose,the PLSR was the best model(R^(2)=0.94%)when the data were pretreated with mean *** the best alternatives inNear Infrared(NIR)data preprocessing and calibration techniques,methods for quantification of lignocellulose components of agricultural residues have been developed which is rapid,cost effective,and less chemical intensive and easily usable in pulp and paper industries and pulp testing laboratories.

关键词： Agricultural residue Multivariate modeling Lignocellulose component

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Cyclophilin D as a potential therapeutic target of liver ischemia/reperfusion injury by mediating crosstalk between apoptosis and autophagy

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慢性疾病与转化医学:英文版 2023年第3期9卷 238-249页

作者： Mengjiao Yang Zhihui Wang Jin Xie MdReyad‐ul‐ferdous Siying Li Yongfeng Song Department of Endocrinology Shandong Provincial Hospital Affiliated to Shandong First Medical UniversityJinanShandongChina Shandong Key Laboratory of Endocrinology and Lipid Metabolism JinanShandongChina Shandong Institute of Endocrine and Metabolic Diseases JinanShandongChina Department of Endocrinology Shandong Provincial HospitalCheeloo College of MedicineShandong UniversityJinanShandongChina Department of Endocrinology and Metabolism Central Hospital Affiliated to Shandong First Medical UniversityJinanShandongChina

Background:Liver ischemia/reperfusion(I/R)injury is a complex and multifactorial pathophysiological *** is well recognized that the membrane permeability transition pore(mPTP)opening of mitochondria plays a crucial role in cell death after I/R *** D(CypD)is a critical positive regulator of ***,the effect of CypD on the pathogenesis of liver I/R injury and whether CypD is a potential therapeutic target are still ***:We constructed liver-specific CypD knockout and AAV8-peptidyl prolyl isomerase F(PPIF)overexpression ***,a 70%liver I/R injury model was established in mice,with 90 min of ischemia and 6 h of *** liver function was detected by the level of serum glutamic pyruvic transaminase(alanine transaminase)and glutamic oxaloacetic transaminase(aspartate aminotransferase),the liver damage score and degree of necrosis were measured by hematoxylin and eosin(H&E)staining of liver *** oxygen species(ROS)staining,apoptosis,and autophagy-related molecules were used to detect apoptosis and autophagy during liver I/***:The liver-specific knockout of CypD alleviated necrosis and dysfunction in liver I/R injury,by reducing the excessive production of ROS,and inhibiting cell apoptosis and *** the contrary,overexpression of CypD exacerbated I/R-induced liver ***:We found that the downregulation of CypD expression alleviated liver I/R injury by reducing apoptosis and autophagy through caspase-3/Beclin1 crosstalk;in contrast,the upregulation of CypD expression aggravated liver I/R ***,interfering with the expression of CypD seems to be a promising treatment for liver I/R injury.

关键词： apoptosis autophagy cyclophilin D ischemia/reperfusion necrosis reactive oxygen species

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