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mining the Chatbot Brain to Improve COVID-19 Bot Response Accuracy

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Computers, materials & Continua 2022年第2期70卷 2619-2638页

作者： mukhtar Ghaleb yahya Almurtadha Fahad Algarni monir Abdullah Emad Felemban Ali m.Alsharafi mohamed Othman Khaled Ghilan Department of Information Systems College of Sciences and ArtsUniversity of BishaAl Namas67392Saudi Arabia Department of Computer Science College of Computing and Information TechnologyUniversity of TabukTabuk71491Saudi Arabia Department of Computer Science College of Computing and Information TechnologyUniversity of BishaBisha61922Saudi Arabia Computer Engineering Department Umm Al-Qura UniversityMakkah21955Saudi Arabia Department of Communication Technology and Network Universiti Putra MalaysiaSelangor43400Malaysia Faculty of Public Health and Tropical medicine Jazan UniversityJazan45142Saudi Arabia

People often communicate with auto-answering tools such as conversational agents due to their 24/7 availability and unbiased ***,chatbots are normally designed for specific purposes and areas of experience and cannot answer questions outside their *** employ Natural Language Understanding(NLU)to infer their *** is a need for a chatbot that can learn from inquiries and expand its area of experience with *** chatbot must be able to build profiles representing intended topics in a similar way to the human brain for fast *** study proposes a methodology to enhance a chatbot’s brain functionality by clustering available knowledge bases on sets of related themes and building representative *** used a COVID-19 information dataset to evaluate the proposed *** pandemic has been accompanied by an“infodemic”of fake *** chatbot was evaluated by a medical doctor and a public trial of 308 real *** obtained and statistically analyzed tomeasure effectiveness,efficiency,and satisfaction as described by the ISO9214 *** proposed COVID-19 chatbot system relieves doctors from answering *** provide an example of the use of technology to handle an infodemic.

关键词： machine learning text classification e-health chatbot COVID-19 awareness natural language understanding

An Abstractive Summarization Technique with Variable Length Keywords as per Document Diversity

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Computers, materials & Continua 2021年第3期66卷 2409-2423页

作者： muhammad yahya Saeed muhammad Awais muhammad Younas muhammad Arif Shah Atif Khan m.Irfan Uddin marwan mahmoud Department of Software Engineering Government College UniversityFaisalabadFaisalabad38000Pakistan Department of IT and Computer Science Pak-Austria Fachhochschule Institute of Applied Sciences and TechnologyHaripurPakistan Department of Computer Science Islamia College PeshawarPeshawarPakistan Institute of Computing Kohat University of Science and TechnologyKohatPakistan Faculty of Applied Studies King Abdulaziz UniversityJeddahSaudi Arabia

Text Summarization is an essential area in text mining,which has procedures for text *** natural language processing,text summarization maps the documents to a representative set of descriptive ***,the objective of text extraction is to attain reduced expressive contents from the text *** summarization has two main areas such as abstractive,and extractive *** text summarization has further two approaches,in which the first approach applies the sentence score algorithm,and the second approach follows the word embedding *** such text extractions have limitations in providing the basic theme of the underlying *** this paper,we have employed text summarization by TF-IDF with PageRank keywords,sentence score algorithm,and Word2Vec word *** study compared these forms of the text summarizations with the actual text,by calculating cosine ***,TF-IDF based PageRank keywords are extracted from the other two extractive *** intersection over these three types of TD-IDF keywords to generate the more representative set of keywords for each text document is *** technique generates variable-length keywords as per document diversity instead of selecting fixedlength keywords for each *** form of abstractive summarization improves metadata similarity to the original text compared to all other forms of summarized *** also solves the issue of deciding the number of representative keywords for a specific text *** evaluate the technique,the study used a sample of more than eighteen hundred text *** abstractive summarization follows the principles of deep learning to create uniform similarity of extracted words with actual text and all other forms of text *** proposed technique provides a stable measure of similarity as compared to existing forms of text summarization.

关键词： metadata page rank sentence score word2vec cosine similarity This

Study of Axial Vibration of a motor-Compressor System Using Operational modal Analysis

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Sound & Vibration 2023年第1期57卷 119-131页

作者： m.Farid yahya Reduan mat Dan m.Fadzlee Samsubaha Zaini Rashid Azma Putra Engineering Department Malaysia Refining Company(Petronas)Pesiaran PenapisanSungai UdangMelaka76300Malaysia Center for Advance Research on Energy Universiti Teknikal Malaysia MelakaHang Tuah JayaDurian TunggalMelaka76100Malaysia Fakulti Teknologi dan Kejuruteraan mekanikal Universiti Teknikal Malaysia MelakaHang Tuah JayaDurian TunggalMelaka76100Malaysia

A case study of excessive vibration on a motor-compressor system is presented in this *** barely two months of operation,the reciprocating compressor motor’s routine monitoring revealed excessive axial vibration *** this reason,the Operational modal Analysis(OmA)was carried out in order to identify the pri-mary *** to the investigation,one of the harmonic components which was 18 times the motor’s running speed matched with a resonance frequency of 112 *** to OmA study,the motor was vibrating in torsional motion because the compressor’s load had stimulated the entire motor-compressor unit at this reso-nance *** analysis also demonstrates the bulging effect of the motor shaft’s axial vibration on the motor’s endplate.

关键词： Axial vibration operational modal analysis rotating machinery

Theoretical and experimental research on effect of fins attachment on operating parameters and thermal efficiency of solar air collector

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Information Processing in Agriculture 2018年第4期5卷 411-421页

作者： Ali Daliran yahya Ajabshirchi Department of Agricultural machinery University of TabrizTabrizIran

Flat plate air collector is a type of heat exchanger which absorbs radiated solar energy and exchanges it to *** to low efficiency of this type of collectors,a suitable approach is investigated in this paper so as to increase thermal performance of the *** efficiency of solar collector for two models C1(without fins)and C2(with fins)both of 1 m^2 surface area with forced convection flow is studied theoretically and *** fins are attached over back board in air channel to create turbulence in air *** order to measure air temperature,17 thermal sensors(Lm35)are exploited,among which 11 were mounted on absorber plate and the remaining 6 on the back *** design of experimental model are performed in Solidwork and programming of theoretical work in matlab *** this research,a fan with constant mass flow rate of 0.033 kg/s is utilized for producing air *** indicate that applying fins in air channel not only reduces Nusselt number from 19.67 to 16.23,but also due to decreasing hydraulic diameter and creating air flow turbulence,causes increase of heat transfer coefficient from absorber plate to air flow and consequently reduction of total heat loss and higher outlet air *** difference of outlet air temperature between experimental and theoretical results for both collectors(C1 and C2)was recorded respectively as 7.6% and 9.4%.Thermal efficiency was respectively calculated 30% and 51% for experimental types with and without fins and 33% and 55% for those of theoretical work which generally seem reasonable.

关键词： Solar air collector Fins Thermal efficiency Energy efficiency Renewable energy

Progression of diethylnitrosamine-induced hepatic carcinogenesis in carnitine-depleted rats

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World Journal of Gastroenterology 2009年第11期15卷 1373-1380页

作者： Salim S Al-Rejaie Abdulaziz m Aleisa Abdulaziz A Al-yahya Saleh A Bakheet Abdulmalik Alsheikh Amal G Fatani Othman A Al-Shabanah mohamed m Sayed-Ahmed Department of Pharmacology College of PharmacyKing Saud UniversityPO Box 2457Kingdom of Saudi Arabia Department of Pathology College of MedicineKing Saud UniversityPO Box 2457 Kingdom of Saudi Arabia

AIm:To investigate whether carnitine deficiency is a risk factor during the development of diethylnitrosamine (DENA)-induced hepatic carcinogenesis. mETHODS:A total of 60 male Wistar albino rats were divided into six groups with 10 animals in each *** in group 1(control group)received a single intraperitoneal(i.p.)injection of normal saline. Animals in group 2(carnitine-supplemented group) were given L-carnitine(200 mg/kg per day)in drinking water for 8 *** in group 3(carnitine-depleted group)were given D-carnitine(200 mg/kg per day)and mildronate(200 mg/kg per day)in drinking water for 8 *** in group 4(DENA group)were injected with a single dose of DENA(200 mg/kg,i.p.)and 2 wk later received a single dose of carbon tetrachloride(2 mL/kg) by gavage as 1:1 dilution in corn *** in group 5(DENA-carnitine depleted group)received the same treatment as group 3 and group *** in group 6 (DENA-carnitine supplemented group)received the same treatment as group 2 and group ***:Administration of DENA resulted in a significant increase in alanine transaminase(ALT), gamma-glutamyl transferase(G-GT),alkaline phosphatase(ALP),total bilirubin,thiobarbituric acid reactive substances(TBARS)and total nitrate/ nitrite(NOx)and a significant decrease in reduced glutathione(GSH),glutathione peroxidase(GSHPx), catalase(CAT)and total carnitine content in liver *** the carnitine-depleted rat model,DENA induced a dramatic increase in serum ALT,G-GT,ALP and total bilirubin,as well as a progressive reduction in total carnitine content in liver ***, L-carnitine supplementation resulted in a complete reversal of the increase in liver enzymes,TBARS and NOx,and a decrease in total carnitine,GSH,GSHPx, and CAT induced by DENA,compared with the control *** examination of liver tissues confirmed the biochemical data,where L-carnitine prevented DENA-induced hepatic carcinogenesis while D-carnitine-mildronate aggravated DENA-

关键词： Carnitine deficiency D-carnitine L-carnitine Diethylnitrosamine Hepatic carcinogenesis

Feasibility of developing composite action between concrete and cold-formed steel beam

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Journal of Central South University 2013年第12期20卷 3689-3696页

作者： S.O.Bamaga m.md.Tahir T.C.Tan S.mohammad N.yahya A.L.Saleh m.mustaffar m.H.Osman A.B.A.Rahman Construction Research Centre (UTm-CRC) Faculty of Civil EngineeringUniversiti Teknologi Malaysia

Cold-formed steel structures are steel structure products constructed from sheets or coils using cold rolling, press brake or bending brake method. These structures are extensively employed in building construction industry due to their light mass, ductility by economic cold forming operations, favorable strength-to-mass ratio and other factors. The utilization of cold formed steel sections with concrete as composite can hugely reduce the construction cost. However, the use of cold formed steel members in composite concrete beams has been very limited. A comprehensive review of developments in composite beam with cold formed steel sections was introduced. It was revealed that employing cold-formed steel channel section to replace reinforcement bars in conventional reinforced concrete beam results in a significant cost reduction without reducing strength capacity. The use of composite beam consisting of cold-formed steel open or close box and filled concrete could also reduce construction cost. Lighter composite girder for bridges with cold-formed steel of U section was introduced. moreover, types of shear connectors to provide composite action between cold-formed steel beam and concrete slab were presented. However, further studies to investigate the effects of metal decking on the behavior of composite beam with cold-formed steel section and introduction of ductile shear connectors were recommended.

关键词： cold formed steel beam composite shear connection thin-wall composite girder

Effects of Pits and mounds Following Windthrow Events on Soil Features and Greenhouse Gas Fluxes in a Temperate Forest

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Pedosphere 2015年第6期25卷 853-867页

作者： yahya KOOCH Sakineh mollaei DARABI Seyed mohsen HOSSEINI Department of Forestry Faculty of Natural Resources & Marine SciencesTarbiat Modares University

Pit and mound micro-relief(resultant microsites from trees uprooted by windthrow) could have regimes of microclimate and soil features that differ from areas of undisturbed soil. In an attempt to provide a comprehensive evaluation of the significance of pits and mounds on soil features and also the dynamics of greenhouse gas(GHG) fluxes at local scale, this study was carried out in a reserved area of Darabkola forest in mazandaran Province, northern Iran. The age of a pit and mound was considered equal to the degree of decay of the blown down tree. Three microsites were distinguished, consisting of pit bottom(PB), mound top(mT) and undisturbed area(UA). Soil samples were taken at 0–15 and 15–30 cm depths from all microsites and analysed for soil physical, chemical and biological features. Our findings suggested that in context of forest ecology, pits and mounds following windthrow events should be considered as an effective factor influencing soil features(i.e., density, texture, water content, p H, organic C, total N, available nutrients and earthworm density/biomass) and especially GHG fluxes. Results showed that mT acted as a sink for N2O(-0.010 mg N2 O m-2d-1) and CH4(-0.257 mg CH4m-2d-1) fluxes and also produced lower CO2 concentrations(0.095 mg CO2 m-2d-1) than PB(0.207 mg CO2 m-2d-1) and UA(0.098 mg CO2 m-2d-1). As a consequence, a separation into pits/mounds would be important for a precise budgeting of greenhouse gases.

关键词： carbon dioxide, methane microsite, nitrous oxide oriental beech, uprooted tree

Interactions of ferro-nanoparticles(hematite and magnetite) with reservoir sandstone: implications for surface adsorption and interfacial tension reduction

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Petroleum Science 2020年第4期17卷 1037-1055页

作者： Abdullah musa Ali Noorhana yahya Saima Qureshi Universiti Teknologi PETRONAS 32610 Seri IskandarPerakMalaysia Geology Department Bayero UniversityKanoKanoNigeria

There are a few studies on the use of ferro-nanofluids for enhanced oil recovery,despite their magnetic properties;hence,it is needed to study the adsorption of iron oxide(Fe2 O3 and Fe3 O4) nanoparticles(NPs) on rock *** is important as the colloidal transport of NPs through the reservoir is subject to particle adsorption on the rock *** dynamics simulation was used to determine the interfacial energy(strength) and adsorption of Fe2 O3 and Fe3 O4 nanofluids infused in reservoir *** transform infrared spectroscopy and X-ray photon spectroscopy(XPS) were used to monitor interaction of silicate species with Fe2 O3 and Fe3 *** spectral changes show the variation of dominating silicate anions in the ***,the XPS peaks for Si,C and Fe at 190,285 and 700 eV,respectively,are less distinct in the spectra of sandstone aged in the Fe3 O4 nanofluid,suggesting the intense adsorption of the Fe3 O4 with the crude *** measured IFT for brine/oil,Fe2 O3/oil and Fe3 O4/oil are 40,36.17 and 31 mN/m,***3 O4 infused with reservoir sandstone exhibits a higher silicate sorption capacity than Fe2 O3,due to their larger number of active surface sites and saturation magnetization,which accounts for the effectiveness of Fe3 O4 in reducing IFT.

关键词： magnetite and hematite nanoparticles Rock surface adsorption molecular dynamics simulation Interfacial tension(IFT)

Trilateral interaction between innervation,leukocyte,and adventitia:a new driver of atherosclerotic plaque formation

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Signal Transduction and Targeted Therapy 2022年第8期7卷 2670-2672页

作者： yahya Sohrabi Holger Reinecke Oliver Soehnlein Department of Cardiology I—Coronary and Peripheral Vascular Disease Heart FailureUniversity Hospital MünsterWestfälische Wilhelms-UniversitätMünsterGermany Institutes of molecular Genetics of the Czech Academy of Sciences PragueCzechia Institute of Experimental Pathology(ExPat) Center for Molecular Biology of Inflammation(ZMBE)University Hospital MünsterWestfälische Wilhelms-UniversitätMünsterGermany Department of Physiology and Pharmacology(FyFa) Karolinska InstitutetStockholmSweden

A recent study by mohanta et *** a new understanding of neuroimmune interactions in *** atherosclerotic plaques are not innervated,ablating the sympathetic innervation to these regions attenuated atherosclerosis,suggesting a potential novel therapeutic *** continues to be the leading cause of death in industrialized countries due to its complications such as acute myocardial infarction or *** disease is the result of a complex process,consisting of sub-endothelial lipid retention,immune cell migration,proteolytic injury,altogether leading to a chronic inflammatory responses in the wall of large arteries and ultimately plaque development.2 The inner layer of the blood vessels is not innervated and hence the nervous system connects with the vessel through its most outer layer,the lamina adventitia,hereby controlling important functions including arterial blood *** such homeostatic control of vessel function,increasing evidence demonstrates that activation of the sympathetic nervous system can modulate the degree of arterial inflammation.

关键词： sympathetic acute hence