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Enhanced asphalt dynamic modulus prediction: A detailed analysis of artificial hummingbird algorithm-optimised boosted trees

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Journal of Road Engineering 2024年第2期4卷 224-233页

作者： ikenna d.uwanuakwa Ilham Yahya Amir Lyce Ndolo Umba department of Civil Engineering Near East UniversityMersin 10Turkey Faculty of Sciences University of LubumbashiLubumbashiThe Democratic Republic of Congo

This study introduces and evaluates a novel artificial hummingbird algorithm-optimised boosted tree(AHAboosted)model for predicting the dynamic modulus(E*)of hot mix asphalt *** a substantial dataset from NCHRP Report-547,the model was trained and rigorously *** metrics,specifically RMSE,MAE,and R2,were employed to assess the model's predictive accuracy,robustness,and *** benchmarked against well-established models like support vector machines(SVM)and gaussian process regression(GPR),the AHA-boosted model demonstrated enhanced *** achieved R2 values of 0.997 in training and 0.974 in testing,using the traditional Witczak NCHRP 1-40d model *** features such as test temperature,frequency,and asphalt content led to a 1.23%increase in the test R2,signifying an improvement in the model's *** study also explored feature importance and sensitivity through SHAP and permutation importance plots,highlighting binder complex modulus|G*|as a key *** the AHA-boosted model shows promise,a slight decrease in R2 from training to testing indicates a need for further ***,this study confirms the AHA-boosted model as a highly accurate and robust tool for predicting the dynamic modulus of hot mix asphalt concrete,making it a valuable asset for pavement engineering.

关键词： Asphalt dynamic modulus Prediction Artificial hummingbird algorithm Boosted tree

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Analytical study of silane-based and wax-based additives on the interfacial bonding characteristics between natural rubber modified binder and different aggregate types

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Journal of Road Engineering 2023年第2期3卷 171-185页

作者： Ashiru Sani Mohd Rosli Mohd Hasan Khairul Anuar Shariff Najib Mukhtar Mohammad Nishat Akhtar ikenna d.uwanuakwa Qingli dai Tracy Leh Xin Wong School of Civil Engineering Universiti Sains MalaysiaNibong Tebal 14300Malaysia department of Civil Engineering Kano University of Science and TechnologyKano 3244Nigeria School of Materials and Mineral Resources Engineering Universiti Sains MalaysiaNibong Tebal 14300Malaysia department of Civil Engineering Bayero UniversityKano 700241Nigeria School of Aerospace Engineering Universiti Sains MalaysiaNibong Tebal 14300Malaysia department of Civil Engineering Near East UniversityMersin 99138Turkey department of Civil EnvironmentalAnd Geospatial EngineeringMichigan Technological UniversityHoughtonMI 49931USA

The modification of asphalt binder with natural rubber latex(NR)significantly improves the rutting and fatigue resistance of asphalt ***,NR-modified binder is prone to low workability and wettability due to its high ***,this research focuses on examining the influences of silane and wax-based additives on the wettability of natural rubber-modified binders and the binder-aggregates adhesion *** this study,experimental and analytical approaches were *** contact angles of asphalt binder were measured using a goniometer through the sessile drop method with three solvents:deionised water,formamide,and *** Cþþalgorithm was adopted to compute the surface free energy(SFE)elements of the asphalt *** methods were employed to analyse the results based on the Young-dupre equation,followed by linear regression to establish a correlation between the compatibility ratio(CR)and the SFE *** results inferred that modified asphalt binders with additives possessed improved moisture resistance,wherein dry work adhesion values were less than 210 mJ/m^(2)under granite interfaces,whereas the limestone interface exhibited higher dry adhesion values of 340 mJ/m^(2)and *** performance results were observed under wet adhesion conditions;with granite wet adhesive values observed below 120 mJ/m^(2),while limestone wet adhesion values were ascertained below 180 mJ/m^(2)for all tested samples and *** to the spread–ability coefficient results,the limestone interface has greater spread-ability than granite ***,compatibility ratio values indicated better compatibility of 1.9 or higher for tested samples under granite interfaces,whereas compatibility values of 1.7 and below were observed under limestone interfaces.

关键词： Bitumen Compatibility ratio Fracture resistance Surface free energy Additiv

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Effect of diminazene aceturate,levamisole and vitamin C combination therapy in rats experimentally infected with Trypanosoma brucei brucei

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Asian Pacific Journal of Tropical Medicine 2014年第6期7卷 438-445页

作者： Adieme Ijeoma Chekwube Ezeh ikenna Onyema Ugochukwu Emmanuel ikenna Romanus Chukwuduruo Ezeokonkwo department of Veterinary Medicine University of Nigeria department of Veterinary Parasitology and Entomology University of Nigeria

Objective:To investigate the effect of diminazene aceturale(dA) alone or in combination with either levamisole and/or Vitamin C in albino rats experimentally infected with Trypanosoma brucei ***:Thirty adult male albino rats,randomly assigned into 6 groups(A—F) of 5rats each were *** were either infected with 1×10~a trypanosomes intraperitoneally(groups A-E) or uninfected(group F).The different groups were treated respectively as follows:group A-with 3.5 mg/kg dA;group B-3.5 mg/kg dA and 7.5 mg/kg levamisole;group C-3.S mg/kg dA and 100 mg/kg vitamin C;and group d-3.S mg/kg dA and 7.S mg/kg levamisole and 100 mg/kg vitamin *** E was left *** assessed include:rectal temperature,body weight changes,packed cell volume(PCV),Haemoglobin concentration(Hb),total leucocyte count(TLC) differential leucocyte count(dLC),parasitaemia,clinical signs and ***:Average pre-patent period of 5 days was *** in the blood were cleared in all treated groups(A-d) within 48 hours post treatment(PT).Untreated rats in group E died between25 and 32 days post infection(PI).Relapse was not recorded in all the treated groups(A-d).The initial reduction in PCV,Hb,TLC and increases in rectal temperature following infection were reversed by the *** rats that received drug combinations(groups B,C and d)showed faster and higher recovery rates than the uninfected control and group ***:Levamisole and/or Vitamin C combination with dA were more effective in the treatment of rats infected with Trypanosoma brucei brucei.

关键词： diminazene aceturate Levamisole Vitamin C Therapy Trypanosoma brucei brucei Rats

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Prevalence of Schistosoma mono- and co-infections with multiple common parasites and associated risk factors and morbidity profile among adults in the Taabo health and demographic surveillance system, South-Central Côte d’Ivoire

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Infectious diseases of Poverty 2022年第1期11卷 84-85页

作者： Fidèle K.Bassa ikenna C.Eze Rufin K.Assaré Clémence Essé Siaka Koné Félix Acka Véronique Laubhouet-Koffi dinard Kouassi Bassirou Bonfoh Jürg Utzinger Eliézer K.N’Goran Unitéde Formation et de Recherche Biosciences UniversitéFélix Houphouët-Boigny22P.O.Box 582Abidjan 22Côte d’Ivoire 不详

Background Schistosomiasis remains an important public health problem,also among adults,and infected individuals not treated serve as a reservoir for continued *** this fact,evidence on the epidemiology of schistosomiasis in adults in Côte d’Ivoire is *** study aimed to determine the prevalence and risk factors of Schistosoma infection and co-infection with other helminth species and Plasmodium among adults in the Taabo region in the south-central part of Côte d’*** A cross-sectional survey was carried out in April and May 2017 in the frame of the“Côte d’Ivoire dual Burden of disease Study”(CoduBu).A total of 901 randomly selected individuals,aged 18–90 years,provided blood,stool and urine samples for the diagnosis of malaria and helminth *** samples were subjected to the Kato-Katz technique for detection of Schistosoma mansoni and soil-transmitted helminth eggs,while urine samples were examined for eggs of Schistosoma haematobium and circulating cathodic antigen of *** factors and morbidity profiles were assessed using health examination and *** logistic regressions were employed to identify risk factors and morbidity patterns associated with *** mono-and *** The prevalence of *** and *** was 23.2%and 1.0%,*** *** were mono-infections(81.3%).Independent determinants of *** infection were young age,low socioeconomic status(mono-and co-infection)and poor hygiene practices(co-infection)(Pdependently associated with higher pain and symptom scores(mono-infection),poor self-rated health and low healthcare use(co-infection)(Pdy showed that adults represent a substantial reservoir of *** sustain schistosomiasis control and improve people’s wellbeing,it is important to expand preventive chemotherapy from school-aged children to adults,coupled with hygiene and

关键词： Adults Côte d’Ivoire Morbidity patterns Prevalence Risk factor Schistosoma infection

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Cryogenic 3d Printing of Bacterial Cellulose—based Scaffolds for Tissue Engineering and Regenerative Medicine Applications

Cryogenic 3D Printing of Bacterial Cellulose—based Scaffold...

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中国化学会第一届全国纤维素学术研讨会

作者： Muhammad Wajid Ullah Manjila Adhikari Omar Mohammad Atta Vincent ikenna Iloh Stezhka Yulia Guang Yang department of Biomedical Engineering College of Life Science and Technology Huazhong University of Science and Technology

＜正＞Three—dimensional printing is an advanced and innovative technology that has received growing interest and revolutionized the tissue engineering and regenerative medicine fields. It refers to printing of bioink （i.e., viable cells and polymer solution） in a premeditated layer—by—layer stacking pattern. A bioink should demonstrate low viscosity, stiffness, and crosslinking,

关键词： Bacterial cellulose Bioink Cryogenic printing Characterization Biomedical Applications

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