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Enhancing compressive strength and durability of self-compacting concrete modified with controlled-burnt sugarcane bagasse ash-blended cements

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Frontiers of Structural and Civil Engineering 2022年第2期16卷 161-174页

作者： duc-Hien le Yeong-Nain SHEEN Khanh-Hung NGUYEN Sustainable Developments in Civil Engineering Research Group Faculty of Civil EngineeringTon Duc Thang UniversityHo Chi Minh City700000Vietnam Department of Civil Engineering Kaohsiung University of Science and TechnologyKaohsiung80778China Department of Civil Engineering Lac Hong UniversityBien Hoa810000Vietnam

In sugar industries,the growing amount of sugarcane bagasse ash(SBA),a byproduct released after burning bagasse for producing electricity,is currently causing environmental *** residual ash displays a pozzolanic potential;and hence,it has potential as a cement *** study focuses on enhancing suitability of SBA through incorporating ground blast furnace slag(BFS)in manufacturing self-compacting concretes(SCCs).For this purpose,SBA was processed by burning at 700°C for 1 h,before being ground to the cement fineness of 4010 cm2/*** mixtures were prepared by changing the proportions of SBA and BFS(i.e.,10%,20%,and 30%)in blended systems;and their performance was *** results showed that the presence of amorphous silica was detected for the processed SBA,revealing that the strength activity index was above 80%.The compressive strength of SCC containing SBA(without BFS)could reach 98%–127%of that of the control;combination of SBA and 30%BFS gets a similar strength to the control after 28 *** durability,the 10%SBA+30%BFS mix exhibited the lowest risk of ***,the joint use of SBA and BFS enhanced significantly the SCC’s sulfate ***,a hyperbolic formula for interpolating the compressive strength of the SBA-based SCC was proposed and validated with error range estimated within±10%.

关键词： sugarcane bagasse ash self-compacting concrete compressive strength sulfate resistance water absorption strength formula

Optimal turning method of composting regarding hygienic safety

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Journal of Environmental Sciences 2005年第2期17卷 194-199页

作者： Masafumi Tateda le duc Trung Michihiko Ike Masanori Fujita Department of Environmental Systems Engineering College of TechnologyToyama Prefectural University5180 KurokawaKosugiImizuToyama 939-0398Japan Department of Environmental Engineering Graduate School of EngineeringOsaka University2-1 YamadaokaSuitaOsaka 565-0871Japan

The new turning method was proposed and verified its effectiveness to pathogens by laboratory scale *** the results obtained from the previous studies,it could be said that turning of a composting pile was essential in terms of hygienic aspects but the number of turning should be *** of inactivation was estimated for each composting *** this estimation,turning by layers,which is different from conventional turning that mixes compost pile entirely,was proposed and investigated its performance by *** operations with static pile method,complete mix(conventional)turning method,and proposed turning(layer turning)method were done and their effectiveness on inactivation of indicator microorganism was evaluated and *** results,the conventional turning method was not a proper method in terms of pathogen inactivation,whereas,the proposed turning method showed an excellent performance and should be employed in a composting operation.

关键词： composting turning inactivation hygienic safety

Ethanol exposed maturing rat cerebellar granule cells show impaired energy metabolism and increased cell death after oxygen-glucose deprivation

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Neural Regeneration Research 2019年第3期14卷 485-490页

作者： Ana Spataru Diana le duc leon Zagrean Ana-Maria Zagrean Division of Physiology and Neuroscience Carol Davila University of Medicine and Pharmacy King's College Hospital London UK Institute of Human Genetics University of Leipzig Hospitals and Clinics Leipzig GermanyDepartment of Evolutionary Genetics Max Planck Institute for Evolutionary Anthropology

Alcohol, a widely abused drug, has deleterious effects on the immature nervous system. This study investigates the effect of chronic in vitro ethanol exposure on the metabolism of immature rat cerebellar granular cells(CGCs) and on their response to oxygen-glucose deprivation(OGD). Primary CGC cultures were exposed to ethanol(100 mM in culture medium) or to control ethanol-free medium starting day one in vitro(DIV1). At DIV8, the expression of ATP synthase gene ATP5 g3 was quantified using real-time PCR, then cultures were exposed to 3 hours of OGD or normoxic conditions. Subsequently, cellular metabolism was assessed by a resazurin assay and by ATP level measurement. ATP5 g3 expression was reduced by 12-fold(P = 0.03) and resazurin metabolism and ATP level were decreased to 74.4 ± 4.6% and 55.5 ± 6.9%, respectively after chronic ethanol treatment compared to control values(P level were decreased to 12.7 ± 1.0% and 9.0 ± 2.0% from control values(P duces the cellular ATP level, possibly through a gene expression down-regulation mechanism, and increases the vulnerability to oxygen-glucose deprivation. Thus, interventions which improve metabolic function and sustain ATP-levels could attenuate ethanol-induced neuronal dysfunction and should be addressed in future studies.

关键词： cell culture chronic ethanol exposure oxygen-glucose deprivation cerebellar granule cells toxicity gene expression cellular ATP cellular metabolism metabolic impairment cell death

Saving Our Planet's Flora,the Contribution of the French National Natural History Museum to the Implementation of the Global Strategy for Plant Conservation

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植物分类与资源学报 2011年第1期33卷 46-52页

作者： Maté DELMAS Jean-Patrick le duc International Relations Department of Botanical and Zoological GardensMuséum National d'Histoire NaturelleParis International Affairs Officer Muséum National d'Histoire NaturelleParis

The National Natural History Museum plays a key role in the implementation of the GSPC through its botanical gardens,the Conservatoire Botanique National du Bassin Parisien,the Herbarium,and also by providing expertise on all areas of the Strategy(botany,conservation,ethonobotany,article 8j,substainable use),*** 2 of the goals of GSPC(conserving plant diversity,Understanding and Documenting Plant Diversity),the Muséum has developed activities all over the world,including compilation of various flora and description of new species,as well as establishment of plant conservation schemes and habitat protection *** also conserves endangered species in the botanical garden.

关键词： Global Strategy for Plant Conservation Conservation Botanical expertise

Applying Wide & Deep learning Model for Android Malware Classification

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Computer Systems Science & Engineering 2023年第6期45卷 2741-2759页

作者： le duc Thuan Pham Van Huong Hoang Van Hiep Nguyen Kim Khanh Ha Noi University of Science and Technology Ha Noi100000Viet Nam Academy of Cryptography Techniques Ha Noi100000Viet Nam

Android malware has exploded in popularity in recent years,due to the platform’s dominance of the mobile *** the advancement of deep learning technology,numerous deep learning-based works have been proposed for the classification of Android *** learning technology is designed to handle a large amount of raw and continuous data,such as image content ***,it is incompatible with discrete features,i.e.,features gathered from multiple ***,if the feature set is already well-extracted and sparsely distributed,this technology is less effective than traditional machine *** the other hand,a wide learning model can expand the feature set to enhance the classification *** maximize the benefits of both methods,this study proposes combining the components of deep learning based on multi-branch CNNs(Convolutional Network Neural)with wide learning *** feature set is evaluated and dynamically partitioned according to its meaning and generalizability to subsets when used as input to the model’s wide or deep *** proposed model,partition,and feature set quality are all evaluated using the K-fold cross validation method on a composite dataset with three types of features:API,permission,and raw *** accuracy with Wide and Deep CNN(WDCNN)model is 98.64%,improved by 1.38%compared to RNN(Recurrent Neural Network)model.

关键词： Wide and deep(W&D)learning convolutional neural network image feature raw features generalized features

Antibiotic usage in surgical sperm retrievals among IVF centers

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Asian Journal of Andrology 2022年第6期24卷 633-638页

作者： le Dang Khoa Ngo Dinh Trieu Vy Nguyen Minh Tai Loc le duc Thang Dang Tuan Anh Nguyen Phuc Hieu Giang Huynh Nhu Nguyen Dinh Tao le Hoang David J Handelsman IVFTA Tam Anh General HospitalHo Chi Minh 700000Vietnam IVFTA Tam Anh General HospitalHa Noi 100000Vietnam IVF Center 16A Ha Dong HospitalHa Noi 100000Vietnam ANZAC Research Institute University of Sydney and Concord Repatriation General HospitalHospital RoadConcordNSW 2139Australia

Surgical sperm retrieval(SSR)is currently one of the most common procedures in in vitro fertilization(IVF).However,a gap between the guidelines and routine clinical practice regarding antibiotic use in sSR,which might lead to antibiotic resistance,is a challenging problem worldwide.A cross-sectional survey was conducted from May 1,2021,to July 15,2021,to investigate antibiotic usage by medical professionals when performing SSR in IVF centers in *** confidential questionnaire comprised 12 items,including characteristics of the study population,awareness of antimicrobial resistance,attitude toward prescribing antibiotics,and current practice of prescribing antibiotics when performing *** were completed by 30 of 45 registered IVF centers(66.7%).Among 67 physicians working at those centers,the age and work-experience years(mean±standard deviation[s.d.])were 38.6±6.6 years and 11.2±7.0 years,*** 60%of them held a degree in Obstetrics and Gynecology,and over four-fifths were *** respondents"often/very often/always"raised awareness of antimicrobial resistance to their patients(83.3%),but only half of them"often/occasionally"prescribed antibiotics to patients with SSR in cases where the prescription would be *** one-tenth of respondents followed the recommendation from the American Urological Association using"prophylaxis only"for SSR *** more invasive SSR,physicians tended to prescribe more complicated and sometimes inappropriate *** conclusion,antibiotic usage in SSR was not always appropriate among IVF *** studies may define specific recommendations for regimens,intervention strategies,and programs to promote appropriate antibiotic use for SSR patients among IVF specialists.

关键词： antibiotic usage in vitro fertilization prophylaxis surgical sperm retrieval treatment

On the Topological Entropy of Nonautonomous Differential Equations

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Journal of Applied Mathematics and Physics 2019年第2期7卷 418-429页

作者： le Huy Tien le duc Nhien Department of Mathematics Mechanics and Informatics Vietnam National University at Hanoi Hanoi Vietnam

The purpose of this paper is to extend the concept topological entropy to nonautonomous linear systems. Next, we shall give estimation of the topological entropy for the class of bounded linear equations on Rn. Finally, we are about to investigate the invariant properties of one through the transformations such as topological conjugacy, topological equivalence and kinematically similar and then show that topological entropy of one is equal to sum of positive Lyapunov characteristic exponents.

关键词： Kinematically Similar Topological Conjugacy Linear Dynamic Equation Topological Entropy

<i>N</i>-Expansive Property for Flows

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Journal of Applied Mathematics and Physics 2019年第2期7卷 410-417页

作者： le Huy Tien le duc Nhien Department of Mathematics Mechanics and Informatics Vietnam National University at Hanoi Hanoi Vietnam

In this paper, we discuss the dynamics of n-expansive homeomorphisms with the shadowing property defined on compact metric spaces in continuous case. For every n∈N, we exhibit an n-expansive homeomorphism but not (n-1)-expansive. Furthermore, that flow has the shadowing property and admits an infinite number of chain-recurrent classes.

关键词： Expansive Flow N-Expansive Shadowing

Exponential Dichotomies and Fredholm Operators of Dynamic Equations on Time Scales

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Applied Mathematics 2019年第1期10卷 39-50页

作者： le Huy Tien le duc Nhien Department of Mathematics Mechanics and Informatics Vietnam National University at Hanoi Hanoi Vietnam

For time-varying non-regressive linear dynamic equations on a time scale with bounded graininess, we introduce the concept of the associative operator with linear systems on time scales. The purpose of this research is the characterizations of the exponential dichotomy obtained in terms of Fredholm property of that associative operator. Particularly, we use Perron’s method, which was generalized on time scales by J. Zhang, M. Fan, H. Zhu in?[1], to show that if the associative operator is semi-Fredholm then the corresponding linear nonautonomous equation has an exponential dichotomy on both?T?+?and?T-.??Moreover, we also give the converse result that the linear systems have?an exponential dichotomy on both?T?+?andT-??then the associative operator is Fredholm on?T.

关键词： Exponential Dichotomy Fredholm Operator Time Scales Linear Dynamic Equation