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Development of a protocol for frost-tolerance evaluation in rapeseed/canola(Brassica napus L.)

The Crop Journal 2016年第2期4卷 147-152页

作者： Danielle Fiebelkorn Mukhlesur rahman Department of Plant Sciences North Dakota State University

Spring frost can severely damage or even kill rapeseed/canola(Brassica napus L.) seedlings. A protocol for large scale screening of rapeseed germplasm under frost-simulating conditions has not yet been developed. Accordingly, the present study was conducted to develop a protocol for screening rapeseed germplasm under artificial frost-simulation conditions in a plant growth chamber and in a greenhouse. Nine rapeseed varieties, including three commercial hybrids, three spring types, and three winter types were used. Cold acclimation at 4 °C was applied for 0, 7, or 14 days to two-week old seedlings. The seedlings were treated with four freezing temperatures(- 4 °C,- 8 °C,- 12 °C, and- 16 °C). The length of the freezing period was 16 h, including the ramping of temperature down from 4 °C and up from the respective freezing temperature to 4 °C. Plants were allowed to recover at 4 °C for24 h before they were moved back to the greenhouse. Frost damage was scored on a 0–5scale, where 0 denotes completely dead and 5 denotes no damage. Seedling survival from the freezing treatment increased from the non-acclimation to the cold acclimation treatment. However, no significant differences(P < 0.05) were found between 7 and14 days of acclimation. Frost treatment at- 4 °C resulted in significant differences in seedling damage relative to the other three temperatures, with the- 16 °C treatment resulting in the highest overall seedling damage. Significant differences were found between the spring type and the other two types(hybrid and winter). However, no significant differences were found between the hybrid and winter types. The suggested protocol for the assessment of frost tolerance is acclimation of two-week old seedlings for7 days at 4 °C followed by frost treatment at- 4 °C for 16 h.

关键词： Frost tolerance Controlled environment Brassica napus Seedling

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An Optimized CNN Model Architecture for Detecting Coronavirus (COVID-19) with X-Ray Images

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Computer Systems Science & Engineering 2022年第1期40卷 375-388页

作者： Anas Basalamah Shadikur rahman Umm Al-Qura University MakkahSaudi Arabia Daffodil International University DhakaBangladesh

This paper demonstrates empirical research on using convolutional neural networks(CNN)of deep learning techniques to classify X-rays of COVID-19 patients versus normal patients by feature *** extraction is one of the most significant phases for classifying medical X-rays radiography that requires inclusive domain *** this study,CNN architectures such as VGG-16,VGG-19,RestNet50,RestNet18 are compared,and an optimized model for feature extraction in X-ray images from various domains invol-ving several classes is *** X-ray radiography classifier with TensorFlow GPU is created executing CNN architectures and our proposed optimized model for classifying COVID-19(Negative or Positive).Then,2,134 X-rays of normal patients and COVID-19 patients generated by an existing open-source online dataset were labeled to train the optimized *** those,the optimized model architecture classifier technique achieves higher accuracy(0.97)than four other models,specifically VGG-16,VGG-19,RestNet18,and RestNet50(0.96,0.72,0.91,and 0.93,respectively).Therefore,this study will enable radiol-ogists to more efficiently and effectively classify a patient’s coronavirus disease.

关键词： X-ray image classification X-ray feature extraction COVID-19 coronavirus disease convolutional neural networks optimized model

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Description of the biology of Caspian vimba,Vimba vimba(Linnaeus,1758),in Gorgan Bay-Miankaleh Wildlife Refuge(southeast Caspian Sea)

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Chinese Journal of Oceanology and Limnology 2010年第6期28卷 1173-1179页

作者： PATIMAR rahman SAFARI Sajjad Gonbad Institutes of Higher Education

We collected Vimba vimba throughout the spawning season （mid April to mid June, 2007） in Gorgan Bay （south-western Iran） and investigated its age, growth, and reproductive traits. The maximum age was 5＋ years. Both sexes grew allometrically （positive for males： b=3.140 9 and negative for females： b=2.791 4）. The von Bertalanffy growth functions were described by the formulae Lf=32.565（1-e-0.184（t＋0.530）） for males and Lt=35.950（1-e-0.179（t＋0.529）） for females. The overall sex ratio was balanced, but males were predominant in the smaller size classes and females in the larger size classes. Based on the gonadosomatic index （GSI） values, spawning appears to occur between late April and late May in the bay. The highest mean GSI was 6.44 for males in early May and 20.36 for females in late April Absolute fecundity varies from the minimum of 5 436 eggs for age 3＋ fish to the maximum of 36 141 eggs for age 5＋ fish. Fecundity was also positively correlated with fish size （length and weight）. Egg diameter ranged from 1.05 to 1.70 nun in the mean of 1.42 mm. There was no correlation between female size and ova diameter.

关键词： ~mba vimba age growth reproduction Gorgan Bay Iran

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Inclusive Multiple Models(IMM)for predicting groundwater levels and treating heterogeneity

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Geoscience Frontiers 2021年第2期12卷 713-724页

作者： rahman Khatibi Ata Allah Nadiri GTEV-ReX Limited SwindonUK Department of Earth Sciences Faculty of Natural ScienceUniversity of Tabriz29 Bahman BoulevardTabrizEast AzerbaijanIran Institute of Environment University of TabrizEast AzerbaijanIran

An explicit model management framework is introduced for predictive Groundwater Levels(GWL),particularly suitable to Observation Wells(OWs)with sparse and possibly heterogeneous *** framework implements Multiple Models(MM)under the architecture of organising them at levels,as follows:(i)Level 0:treat heterogeneity in the data,***-Organised Mapping(SOM)to classify the OWs;and decide on model structure,*** a grey box model to predict GWLs.(ii)Level 1:construct MMs,*** Fuzzy Logic(FL)and one Neurofuzzy(NF)models.(iii)Level 2:formulate strategies to combine the MM at Level 1,for which the paper uses Artificial Neural Networks(Strategy 1)and simple averaging(Strategy 2).Whilst the above model management strategy is novel,a critical view is presented,according to which modelling practices are:Inclusive Multiple Modelling(IMM)practices contrasted with existing practices,branded by the paper as Exclusionary Multiple Modelling(EMM).Scientific thinking over IMMs is captured as a framework with four dimensions:Model Reuse(MR),Hierarchical Recursion(HR),Elastic Learning Environment(ELE)and Goal Orientation(GO)and these together make the acronym of ***,IMM-RHEO is piloted in the aquifer of Tabriz Plain with sparse and possibly heterogeneous *** results provide some evidence that(i)IMM at two levels improves on the accuracy of individual models;and(ii)model combinations in IMM practices bring‘model-learning’into fashion for learning with the goal to explain baseline conditions and impacts of subsequent management changes.

关键词： Artificial intelligence Exclusionary multiple modelling(EMM) Groundwater level prediction Inclusive multiple modelling(IMM) Model management practices

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Outcomes of liver transplantation as an oncologic surgery for different primary liver cancers:A real-world,population-based study

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Hepatobiliary & Pancreatic Diseases International 2023年第1期22卷 88-91页

作者： Omar Abdel-rahman Department of Oncology Cross Cancer Institute and the University of AlbertaEdmontonCanada

To the Editor:Although liver transplantation is likely used to treat individuals with end-stage liver disease because of non-neoplastic reasons,the adoption of liver transplantation in the management of primary liver cancer has been expanding in the past decades[1-3].Prior population-based studies for liver transplantation,in the cancer sphere,focused on delineating the outcomes of patients with hepatocellular carcinoma(HCC)treated with transplantation versus other locoregional treatments[4-6].

关键词： liver cancer surgery

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Test and performance optimization of nozzle inclination angle and swirl combustor in a low-tar biomass gasifier:a biomass power generation system perspective

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Carbon Resources Conversion 2022年第2期5卷 139-149页

作者： Md Mashiur rahman Agricultural Engineering Division Regional Agricultural Research StationBangladesh Agricultural Research InstituteJamalpur2000Bangladesh DTU Chemical Engineering Technical University of Denmark(DTU)Frederiksborgvej 399DK 4000 RoskildeDenmark

A nozzle inclination angle and swirl combustor inside the low-tar biomass(LTB)gasifier reactor were tested and optimized to evaluate these effects on tar reduction to design tar-free producer *** tar reduction process is mainly based on the concept of a swirling flow created by the nozzle inclination angle,with the inclination angle of 55◦to the radial line,allowing good mixing between pyrolysis gases and gasifying agents.A separate swirl combustor has created large internal annular and reverses flow zones with the help of swirl flow,resulting in homogenized temperature inside the combustor and providing longer residence time;both have a positive effect on the combustion of mixed gasifying air-pyrolysis gases by the thermal cracking in the partial oxidation *** ratio(RR)and combustion degree of volatiles are the two optimization parameters for evaluating the performance of NIA and swirl *** result observed that outstanding tar reduction occurred in this novel *** 86.5 and 12.8%of tar compounds are broken down in the partial oxidation zone and pyrolysis zone using the novel swirl combustor and NIA,respectively;gas outlet has observed producer gas having tar concentration of less than 1%.The optimization results reveal that a lower recycling ratio(recycle gas/gasifying air)and a higher combustion degree of volatiles perform better in biomass ***,this system generated producer gas with the tar concentration at an extremely low level of 7.4 mg/Nm^(3)for a biomass moisture content of 9%and appeared the lower heating value of 4.6–5.1 MJ/Nm^(3).This lower tar concentration might be directly coupled with an internal combustion engine or a gas turbine for power generation.

关键词： Biomass gasification Downdraft moving bed gasifier Nozzle inclination angle Swirl combustor Swirl flow Tar Reduction

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Influence of B source materials on the synthesis of TiB_2-Al_2O_3 nanocomposite powders by mechanical alloying

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International Journal of Minerals,Metallurgy and Materials 2013年第12期20卷 1214-1220页

作者： Majid Abdellahi Javad Heidari rahman Sabouhi Materials Engineering Department Islamic Azad University

An Al2O3-TiB2 nanocomposite was successfully synthesized by ball milling of Al, TiO2 and two B source materials of B2O3 （system （1）） and H3BO3 （system （2））. Phase identification of the milled samples was examined by Xray diffraction. The morphology and microstructure of the milled powders were monitored by scanning electron microscopy and transmission electron microscopy. It was found that the formation of this composite was completed after 15 and 30 h of milling time in systems （1） and （2）, respectively. More milling energy was required for the formation of this composite in system （2） due to the lubricant properties of HaBO3 and also its decomposition to HBO2 and B2O3 during milling. On the basis of X-ray diffraction patterns and thermodynamic calculations, this composite was formed by highly exothermic mechanically induced self-sustaining reactions （MSR） in both systems. The MSR mode took place around 9 h and 25 h of milling in systems （1） and （2）, respectively. At the end of milling （15 h for system （1） and 30 h for system （2）） the grain size of about 35-50 nm was obtained in both systems.

关键词： nanocomposites powders alumina titanium diboride mechanical alloying

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Asian Americans have better outcomes of non-metastatic gastric cancer compared to other United States racial groups: A secondary analysis from a randomized study

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World Journal of Gastrointestinal Oncology 2019年第12期11卷 1151-1160页

作者： Omar Abdel-rahman Department of Oncology University of Alberta and Cross Cancer Institute

BACKGROUND It has been recognized for a long time that gastric cancer behavior and outcomes might be different between patients living in Asian countries vs patients living in Western *** is not clear if these differences would persist between patients of Asian ancestry and patients of other racial subgroups within the multiethnic communities of North *** current study hypothesizes that these differences will present within North American multiethnic *** To evaluate the impact of race on survival outcomes of non-metastatic gastric cancer patients in the United *** This is a secondary analysis of a randomized controlled trial(CALGB 80101 study)that evaluated two adjuvant chemoradiotherapy schedules following resection of non-metastatic gastric ***-Meier analysis and log-rank testing were utilized to explore the overall and disease-free survival differences according to the race of the *** and multivariate Cox regression analyses were then used to explore factors affecting overall and disease-free *** A total of 546 patients were included in the current *** which,73.8%have white race(vs 12.8%black Americans and 8.2% Asian Americans).Using Kaplan-Meier analysis/log-rank testing,Asian Americans appear to have better overall and disease-free survival outcomes compared to other United States racial groups(White Americans,Black Americans,and other racial groups)(P=0.011;P=0.010;respectively).Moreover,in an adjusted multivariate model,Asian American race seems to be associated with better overall and disease-free survival(hazard ratio:0.438;95% confidence interval:0.254-0.754),P=0.003;(hazard ratio:0.460;95% confidence interval:0.280-0.755,P=0.002;respectively).CONCLUSION Asian American patients with non-metastatic gastric cancer have better overall and disease-free survival compared to other racial groups in the United *** preclinical and clinical research is needed to clarif

关键词： Race Asian Americans Survival Prognosis Outcomes

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Engineered FeVO4/CeO2 nanocomposite as a two-way superior electro-Fenton catalyst for model and real wastewater treatment

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Journal of Environmental Sciences 2020年第11期32卷 110-119页

作者： Shahrbanoo rahman Setayesh Pegah Nazari Roghaye Maghbool Department of Chemistry Sharif University of TechnologyTehran 11155-3516Iran

FeVO4/CeO2 was applied in the electro-Fenton(EF)degradation of Methyl Orange(MO)as a model of wastewater *** results of the characterization techniques indicate that FeVO4 with triclinic structure and face-centered cubic fluorite CeO2 maintained their structures during the nanocomposite *** effect of applied current intensity,initial pollutant concentration,initial pH,and catalyst weight was *** MO removal reached 96.31%and chemical oxygen demand(COD)removal 70%for 60 min of the *** presence of CeO2 in the nanocomposite plays a key role in H2O2 electro-generation as a significant factor in the electro-Fenton(EF)*** metal leaching from FeVO4/CeO2 was negligible(cerium 4.1%,iron 4.3%,and vanadium 1.7%),which indicates that the active species in the nanocomposite are strongly interacting with each other and are *** performance of the nanocatalyst in real wastewaters,salty,and binary systems was acceptable and the pollutions were removed *** synergistic effect between V,Fe,and Ce could be account as the reason for the respectable function of FeVO4/*** electron transfer proceeds via Haber-Weiss mechanism.A degradation pathway was proposed through by-products analysis using gas chromatography-mass spectrometry(GC–MS)*** pseudo-first-order kinetic model described the obtained experimental results(R2=0.9906).The electro-Fenton system efficiency was improved by adding *** nanocomposite preserved almost its efficiency after six *** obtained results demonstrate that the synergistic catalyst(FeVO4/CeO2)has the capability to introduce as a promising replacement of conventional catalysts in the electro-Fenton processes with brilliant proficiency.

关键词： Electro-Fenton Methyl Orange Synergistic effect Persulfate FeVO4

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Cyber-Physical-Social System Between a Humanoid Robot and a Virtual Human Through a Shared Platform for Adaptive Agent Ecology

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IEEE/CAA Journal of Automatica Sinica 2018年第1期5卷 190-203页

作者： S. M. Mizanoor rahman Department of Mechanical Engineering College of Engineering and Sciences Clemson University SC 29634 USA IEEE

Two artificial agents(a humanoid robot and a virtual human) are enriched with various similar intelligence,autonomy, functionalities and interaction modalities. The agents are integrated in the form of a cyber-physical-social system(CPSS) through a shared communication platform to create a social ecology. In the ecology, the agents collaborate(assist each other) to perform a real-world task(search for a hidden object)for the benefits of humans. A robot-virtual human bilateral trust model is derived and a real-time trust measurement method is developed. The role of taking initiative in the collaboration is switched between the agents following a finite state machine model triggered by bilateral trust, which results in a mixedinitiative collaboration. A scheme is developed to evaluate the performance of the agents in the ecology through the *** results show that the robot and the virtual human perform satisfactorily in the collaboration through the CPSS. The results thus prove the effectiveness of the real-world ecology between artificial agents of heterogeneous realities through a shared platform based on trust-triggered mixed-initiatives. The results can help develop adaptive social ecology comprising intelligent agents of heterogeneous realities to assist humans in various tasks through collaboration between the agents in the form of a CPSS.

关键词： Adaptive agent ecology assisted living cyberphysical-social system(CPSS) humanoid robot(HR) smart homes social interaction virtual human(VH) shared platform trust

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