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Applicability of semi-destructive method to derive allometric model for estimating aboveground biomass and carbon stock in the Hill zone of Bangladesh

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Journal of Forestry Research 2020年第4期31卷 1235-1245页

作者： Hossain mahmood mohammad Raqibul hasan siddique s.m.Zahirul Islam s.m.Rubaiot Abdullah Henry matieu md.Zaheer Iqbal mariam Akhter Forestry and Wood Technology Discipline Khulna UniversityKhulna 9208Bangladesh Forest Inventory Division Bangladesh Forest Research InstituteChittagong 4000Bangladesh Food and Agriculture Organization Rome 00153Italy Bangladesh Forest Department Bana bhabanAgargaonDhaka 1207Bangladesh

Biomass estimation using allometric models is a nondestructive and popular *** of an allometric model can influence the accuracy of biomass *** Forest Department initiated a nationwide forest inventory to assess biomass and carbon stocks in trees and *** relationship between carbon storage and sequestration in a forest has implications for climate change mitigation in terms of the carbon sink in *** part of the national forest inventory,we aimed to derive multi-species biomass models for the hill zone of Bangladesh and to determine the carbon concentration in tree components(leaves,branches,bark and stem).In total,175 trees of 14 species were sampled and a semi-destructive method was used to develop a biomass model,which included development of smaller branch(base diam)biomass allometry and volume estimation of bigger branches and *** best model of leaf,branches,and bark showed lower values for adjusted R2(0.3152-0.8043)and model efficiency(0.436-0.643),hence these models were not recommended to estimate *** best fit model of stem and total aboveground biomass(TAGB)showed higher model efficiency 0.948 and 0.837,respectively,and this model was recommended for estimation of tree biomass for the hill zone of *** best fit allometric biomass model for stem was Ln(stem)=-10.7248+1.6094*Ln(D)+1.323*Ln(H)+1.1469*Ln(W);the best fit model for TAGB was Ln(TAGB)=-6.6937+0.809*Ln(D^2*H*W),where DBH=Diameter at Breast Height,H=Total Height,W=Wood *** two most frequently used pan-tropical biomass models showed lower model efficiency(0.667 to 0.697)compared to our derived TAGB *** best fit TAGB model proved applicable for accurate estimation of TAGB for the hill zone of *** concentration varied significantly(pspecies and tree *** concentration(48-49%)of carbon was recorded in the tree stem.

关键词： Allometry Bangladesh Biomass Carbon Forest inventory

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Accidental ingestion of foreign bodies/harmful materials in children from Bahrain:A retrospective cohort study

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World Journal of Clinical Pediatrics 2023年第4期12卷 205-219页

作者： hasan m Isa shaikha A Aldoseri Aysha s Abduljabbar Khaled A Alsulaiti Department of Pediatrics Salmaniya Medical ComplexManama 26671Bahrain Department of Pediatrics Arabian Gulf UniversityManama 26671Bahrain Department of Radiology Salmaniya Medical ComplexManama 26671Bahrain

BACKGROUND Children like to discover their environment by putting substances in their *** behavior puts them at risk of accidentally ingesting foreign bodies(FBs)or harmful materials,which can cause serious *** To study the clinical characteristics,diagnosis,complications,management,and outcomes of accidental ingestion of FBs,caustics,and medications in *** We conducted a retrospective cohort study of all children admitted for accidental ingestion to the Department of Pediatrics,salmaniya medical Complex,Bahrain,between 2011 and *** data,type of FB/harmful material ingested,and investigations used for diagnosis and management were *** patients were divided into three groups based on the type of ingested material(FBs,caustics,and medications).The three groups were compared based on patient demographics,socioeconomic status(sEs),symptoms,ingestion scenario,endoscopic and surgical complications,management,and *** FB anatomical location was categorized as the esophagus,stomach,and bowel and compared with respect to *** Fisher’s exact,Pearson’s χ^(2),mann-Whitney U,and Kruskal-Wallis tests were used for *** A total of 161 accidental ingestion episodes were documented in 153 *** children were boys(n=85,55.6%),with a median age of 2.8(interquartile range:1.8-4.4)*** participants ingested FBs(n=108,70.6%),31(20.3%)ingested caustics,and the remaining 14(9.2%)ingested *** with caustic ingestion were younger at the time of presentation(Pmore symptomatic(n=26/31,89.7%)than those who ingested medications(n=8/14,57.1%)or FBs(n=52/108,48.6%)(Pstic group had more vomiting(Pstions were asymptomatic(n=55/108,51.4%).In terms of FB location,most esophageal FBs were symptomatic(n=14/16,87.5%),whereas most gastric(n=34/56,60.7%)and intestinal FBs(n=19/32,59.4%)were asymptomati

关键词： Pediatric Accidental ingestion Foreign body Caustic Complication Bahrain

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mechanical properties of directionally solidified lead-antimony alloys

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International Journal of minerals,metallurgy and materials 2011年第5期18卷 582-588页

作者： mevlüsahin hasan Kaya Department of Physics Faculty of Arts and SciencesNigde UniversityNigde 51200Turkey Department of science Education Faculty of EducationErciyes UniversityKayseri 38039Turkey

The Pb-17wt% sb alloy was directionally solidified under two solidification conditions：with different temperature gradients （G=0.93-3.67 K/mm） at a constant growth rate （V=17.50 λm/s） and with different growth rates （V=8.3-497 μm/s） at a constant temperature gradient （G=3.67 K/mm） in a Bridgman *** parameters,such as primary dendrite arm spacing （λ1）,secondary dendrite arm spacing （σ2）,and dendrite tip radius （R）,were *** microhardness （Hv） and ultimate tensile strength （λ） of the directional so-lidification samples were also *** influences of solidification and microstructure parameters on Hv and σwere *** results obtained in this work were compared with similar experimental researches in *** is shown that the Hv and σvalues increase with the increase of G and V,but decrease with the increase of λ1,λ2,and R.

关键词： lead-antimony alloy directional solidification microstructure mechanical properties

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A Novel Cryptocurrency Prediction method Using Optimum CNN

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Computers, materials & Continua 2022年第4期71卷 1051-1063页

作者： syed H.hasan syeda Huyam hasan mohammed salih Ahmed syed Hamid hasan Iowa state University AmesUSA University of Texas at Arlington USA Department of Computer Engineering College of Computer Science and Information TechnologyImam Abdulrahman Bin Faisal UniversityDammamSaudi Arabia Department of Information systems Faculty of Computing and Information TechnologyKing Abdulaziz UniversityJeddahSaudi Arabia

In recent years,cryptocurrency has become gradually more significant in economic regions *** cryptocurrencies,records are stored using a cryptographic *** main aim of this research was to develop an optimal solution for predicting the price of cryptocurrencies based on user opinions from social *** is used as a marketing tool for cryptoanalysis owing to the unrestricted conversations on cryptocurrencies that take place on social media ***,this work focuses on extracting Tweets and gathering data from different sources to classify them into positive,negative,and neutral categories,and further examining the correlations between cryptocurrency movements and Tweet *** paper proposes an optimized method using a deep learning algorithm and convolution neural network for cryptocurrency prediction;this method is used to predict the prices of four cryptocurrencies,namely,Litecoin,monero,Bitcoin,and *** results of analyses demonstrate that the proposed method forecasts prices with a high accuracy of about 98.75%.The method is validated by comparison with existing methods using visualization tools.

关键词： Cryptocurrency litecoin monero bitcoin ethereum twitter optimal CNN price prediction sentiment analysis

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Development and Performance study of Controlled Atmosphere for Fresh Tomato

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World Journal of Engineering and Technology 2016年第2期4卷 168-175页

作者： md. Farid Ahmed md. Zahirul Islam md. sazzat Hossain sarker s. m. kamrul hasan Rakib mizan Department of Food Engineering and Technology Hajee Mohammad Danesh Science and Technology University Dinajpur Bangladesh Department of Food Processing and Preservation Hajee Mohammad Danesh Science and Technology University Dinajpur Bangladesh

Development of a controlled atmosphere (CA) plant and shelf-life of fresh tomatoes at different storage conditions were studied in this research. The controlled chamber (4.5' × 4.5' × 4.5') with supplement of 1% L-ascorbic acid as antioxidant source was constructed using locally available materials. Fresh tomatoes were kept with wrapping by low density polyethylene under refrigerated and CA storage conditions. The maximum shelf-life of fresh tomato was 42 days under CA condition and followed by 35 days in refrigeration condition. Though initial cost of controlled atmosphere was high but it resulted in maximum shelf life of tomato. However, CA condition retained the physiological changes namely, color change, Tss, and weight loss of fresh tomatoes than that of stored in refrigerated condition. From nutritional point of view, it was concluded that developed CA plant could be used to extend the shelf-life of fresh tomatoes with minimum physico-chemical changes throughout the storage period.

关键词： Controlled Atmosphere Tomato shelf-Life storage study Weight Loss

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Analyzing study for the 3D potential Yu-Toda-sasa-Fukuyama equation in the two-layer liquid medium

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Journal of Ocean Engineering and science 2024年第5期9卷 454-460页

作者： Hajar F.Ismael Ìsrafil Okumus Tolga Aktürk hasan Bulut m.s.Osman Department of mathematics Faculty of ScienceUniversity of ZakhoZakhoIraq Department of mathematics Faculty of ScienceFirat UniversityElazigTurkey Department of mathematics Faculty of ScienceErzincan Binali Yildirim UniversityErzincanTurkey Department of mathematics and science Education Faculty of EducationOrdu UniversityTurkey Department of mathematics Faculty of Applied ScienceUmm Al-Qura UniversityMakkah 21955Saudi Arabia Department of mathematics Faculty of ScienceCairo UniversityGiza 12613Egypt

In this work,we use the(m+1/G')-expansion method and the Adomian decomposition method to study the 3D potential Yu-Toda-sasa-Fukuyama(3D-pYTsF)equation which has a good application in the twolayer liquid *** the first time,the(m+1/G')-expansion and the Adomian decomposition methods are used to establish novel exact wave solutions and to study some numerical solutions for the 3D-pYTsF equation,*** using the analytical method,kink-type wave,singular solution and some complex solutions to the suggested equation are successfully *** obtained wave solutions are represented with some figures in 3D and contour plots.

关键词： (m+1/G')-expansion method Complex solutions Adomian decomposition method

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Transonic moist Air Flow around a Circular Arc Blade with Bump

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Journal of Thermal science 2009年第4期18卷 325-331页

作者： A.B.m.Toufique hasan shigeru mATsUO Toshiaki sETOGUCHI Heuy Dong KIm Department of mechanical Engineering Bangladesh University of Engineering and Technology Department of mechanical Engineering Saga University school of mechanical Engineering Andong National University

The unsteady phenomena in the transonic flow around airfoils are observed in the flow field of fan, compressor blades and butterfly valves, and this causes often serious problems such as aeroacoustic noise and the vibration. In recent years, the effect of bump wall on the flow field around an airfoil has been investigated experimentally and as a result, it was observed that the bump wall is effective for the control of shock wave on the airfoil. In the transonic or supersonic flow field, a rapid expansion of moist air or steam gives rise to non-equilibrium condensation. In the present study, the effect of non-equilibrium condensation of moist air on the self-excited shock wave oscillation around a circular arc blade with or without a bump on the blade was investigated numerically. The results showed that the non-equilibrium condensation significantly reduced the flow field unsteadiness such as root mean of pressure oscillation and frequency compared to the case without the non-equilibrium condensation.

关键词： transonic flow moist air shock wave oscillation non-equilibrium condensation

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Characteristics of transonic moist air flows around butterfly valves with spontaneous condensation

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Propulsion and Power Research 2015年第2期4卷 72-83页

作者： A.B.m.Toufique hasan s.matsuo T.setoguchib Department of mechanical Engineering Bangladesh University of Engineering and Technology(BUET)Dhaka-1000Bangladesh Department of Advanced Technology Fusion Saga UniversitySaga 8408502Japan

Effects of spontaneous condensation of moist air on the shock wave dynamics around butterfly valves in transonic flows are investigated by experimental and numerical *** symmetric valve disk shapes namely-a flat rectangular plate and a mid-plane cross-section of a prototype butterfly valve have been studied in the present *** showed that in case with spontaneous condensation,the root mean square of pressure oscillation(induced by shock dynamics)is reduced significantly with those without condensation for both shapes of the ***,local aerodynamic moments were reduced in case with condensation which is considered to be beneficial in torque requirement in case of on/off applications of valves as flow control ***,total pressure loss was increased with spontaneous condensation in both the ***,the disk shape of a prototype butterfly valve showed better aerodynamic performances compared to flat rectangular plate profile in respect of total pressure loss and vortex shedding frequency in the wake region.

关键词： Transonic flow shock waves spontaneous condensation Butterfly valves Reynolds-averaged Navier-stokes(RANs)

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Notes concerning Codazzi pairs on almost anti-Hermitian manifolds

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Applied mathematics(A Journal of Chinese Universities) 2023年第2期38卷 223-234页

作者： Aydin Gezer hasan Cakicioglu Department of mathematics Ataturk University25240Erzurum-Turkey

Let∇be a linear connection on a 2n-dimensional almost anti-Hermitian manifold m equipped with an almost complex structure J,a pseudo-Riemannian metric g and the twin metric G=g◦*** this paper,we first introduce three types of conjugate connections of linear connections relative to g,G and *** obtain a simple relation among curvature tensors of these conjugate *** clarify the relations of these conjugate connections,we prove a result stating that conjugations along with an identity operation together act as a Klein group,which is analogue to the known result for the Hermitian case in[2].secondly,we give some results exhibiting occurrences of Codazzi pairs which generalize parallelism relative to∇.Under the assumption that(∇,J)being a Codazzi pair,we derive a necessary and sufficient condition the almost anti-Hermitian manifold(m,J,g,G)is an anti-K¨ahler relative to a torsion-free linear connection∇.Finally,we investigate statistical structures on m under∇(∇is a J−parallel torsion-free connection).

关键词： anti-Kahler structure Codazzi pair conjugate connection twin metric statistical structure

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Detection of Different stages of Alzheimer’s Disease Using CNN Classifier

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Computers, materials & Continua 2023年第9期76卷 3933-3948页

作者： s m hasan mahmud md mamun Ali mohammad Fahim shahriar Fahad Ahmed Al-Zahrani Kawsar Ahmed Dip Nandi Francis m.Bui Department of Computer science American International University-Bangladesh(AIUB)Dhaka1229Bangladesh Centre for Advanced machine Learning and Applications(CAmLAs) DhakaBangladesh Department of software Engineering Daffodil International UniversityDhakaBangladesh Department of Computer Engineering Umm Al-Qura UniversityMecca24381Saudi Arabia Department of ECE University of SaskatchewanSaskatoonSK S7N5A9Canada Group of Biophotomatiχ Department of ICTMBSTUSantoshTangail1902Bangladesh

Alzheimer’s disease(AD)is a neurodevelopmental impairment that results in a person’s behavior,thinking,and memory *** common symptoms ofADare losingmemory and early *** addition to these,there are several serious impacts ***,the impact ofADcanbemitigatedby early-stagedetection though it cannot be cured ***-stage detection is the most challenging task for controlling and mitigating the impact of *** study proposes a predictive model to detect AD in the initial phase based on machine learning and a deep learning approach to address the *** build a predictive model,open-source data was collected where five stages of images of AD were available as Cognitive Normal(CN),Early mild Cognitive Impairment(EmCI),mild Cognitive Impairment(mCI),Late mild Cognitive Impairment(LmCI),and *** stage of AD is considered as a class,and then the dataset was divided into three parts binary class,three class,and five *** this research,we applied different preprocessing steps with augmentation techniques to efficiently *** integrates a random oversampling technique to handle the imbalance problem from target classes,mitigating the model overfitting and *** three machine learning classifiers,such as random forest(RF),K-Nearest neighbor(KNN),and support vector machine(sVm),and two deep learning methods,such as convolutional neuronal network(CNN)and artificial neural network(ANN)were applied on these *** analyzing the performance of the used models and the datasets,it is found that CNN with binary class outperformed 88.20%*** result of the study indicates that the model is highly potential to detect AD in the initial phase.

关键词： Alzheimer’s disease early detection convolutional neural network data augmentation random oversampling machine learning

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