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Asian Pacific Journal of Tropical Biomedicine 2014年第3期4卷 239-243页

作者： Nazairc Azoun rock akpon Martin Akogbéto Centre de Recherche Entomologique de Cotonou(CREC) 06 BP 2604CotonouBenin Faculte des Sciences et Techniques Universite d'Abomey CalaviCalaviBenin

Objective:To determine the susceptibility status to pyrethroid in Anopheles gambiae s.l.(***),the distribution of kdr"Leu-Phe"mutation in malaria vectors in Benin and to compare the current frequency of kdr"Leu-Phe"mutation to the previous frequency after long-lasting insecticide treated nets ***:Larvae and pupae of *** *** were collected from the breeding sites in Littoral,*** and Alibori *** susceptibility tests were conducted on unfed females mosquitoes aged 2-5 d *** mosquitoes were identified to species using PCR *** assays were also carried out to identify kdr mutations in individual ***:The results showed that *** Malanville and Suru-lere populations were resistant to *** *** Parakou and Bohicon populations,they were resistant to *** revealed 100%of mosquitoes tested were *** *** L1014F kdr mutation was found in *** *** and Parakou at various allelic *** increase of kdr allelic frequency was positively correlated with CDC bioassays ***:Pyrethroid resistance is widespread in malaria vector in Benin and kdr mutation is the main resistance mechanism *** attention may be paid for the future success of malaria control programmes based on LLINs with pyrethroids in the country.

关键词： Resistance Insecticide Vectors CDC bioassay Leu-Phe kdr mutation

Study of the efficacy of a Wheaton coated bottle with permethrin and deltamethrin in laboratory conditions and a WHO impregnated paper with bendiocarb in field conditions

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Asian Pacific Journal of Tropical Biomedicine 2014年第6期4卷 492-497页

作者： Nazaire Azoun Roseric Azondekon rock akpon Virgile Gnanguenon Razaki Osse Alex Asidi Martin Akogbeto Centre de Recherche Entomologique de Cotonou(CREC) Faculte des Sciences et Techniques Universite d'Abomey Calavi University of Massachusetts Amherst London School of Hygiene and Tropical Medecine

Objective:To determine the efficacy of WHO impregnated paper and CDC coated bottle based on number of storage days and number of limes of consecutive use,in the assessment of insecticide vector susceptibility tests in laboratory and field ***:Larvae and pupae of Anopheles gambiae *** were collected from the breeding sites in Seme-Kpodji and Cotonou districts in Southern Benin in April 2013 during the first rainy *** gambiae *** were also collected from the breeding sites in Parakou district in Northern Benin in May 2013 at the beginning of the rainy *** tests were done using impregnated paper with bendiocarb(0.1%)following WHO protocol and stock solutions of permethrin(21.5 ug per bottle)and deltamethrin(12.5 ug per bottle)following CDC protocol on unfed female mosquitoes aged 2-5 days *** bioassays were repeated a certain number of *** temperature and relative humidity were monitored and recorded during the susceptibility ***:This study showed that a WHO impregnated paper with bendiocarb could be used four times during four consecutive days in field *** a Wheaton coated bottle with permethrin or deltamethrin,they could be used at least three limes during four consecutive days in laboratory ***:The day storage and the number of times that a WHO impregnated paper and a CDC coated bottle maintained their efficacy are useful in the assessment of insecticide vectors susceptibility tests.

关键词： Efficacy Coated bottle Impregnated paper Insecticide Laboratory conditions Field conditions

Monitoring Adverse Events during Seasonal Malaria Chemoprevention Campaigns for Children Aged 3 - 59 Months in Benin in 2023

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Open Journal of Epidemiology 2024年第4期14卷 579-589页

作者： Cyriaque Affoukou rock Aïkpon Georgia Damiens Olaréwadjou Richard Biaou Boni Géraud Padonou William Houndjo Camille Houetohossou Elysé Sohizoun Thibaud Legba Aurore Ogouyemi Badirou Aguemon Community Health and Epidemiology Unit Faculty of Health Sciences University of Abomey-Calavi Cotonou Benin National Malaria Control Program Cotonou Benin Laboratory of Epidemiology of Chronic and Neurological Diseases (LEMACEN) Faculty of Health Sciences University of Abomey-Calavi Cotonou Benin Ministry of Health Cotonou Benin

Background: Seasonal malaria chemoprevention (SMC) is crucial for reducing the burden of malaria in children. However, adverse events (AEs) can affect treatment adherence and efficacy. This study assesses the prevalence of AEs associated with SMC and identifies factors associated with treatment discontinuation. Methods: A cross-sectional study of 3115 children receiving SMC was conducted. The study was conducted in two departments in northern Benin. The prevalence of AEs and factors associated with discontinuation of treatment were analyzed. Results: Among the children, 578 (18.6%, 95% CI: 17.2 - 19.9) reported AEs, mainly vomiting (63.5%), fever (43.8%) and diarrhea (23.0%). Boys (51.9%) had slightly more AEs than girls (48.1%). The prevalence of AEs was higher in rural areas (64.0%) than in urban areas (36.0%). Only 2.8% of children stopped taking SMC because of AEs. There was no significant association between AEs and discontinuation of SMC (p = 0.608). Children referred to health centers for management of AEs were less likely to discontinue treatment (p = 0.015). Conclusion: AEs were common, but the rate of discontinuation of SMC due to AEs was low, indicating good treatment tolerance. Effective management of AEs in health centers reduces treatment interruptions.

关键词： SMC Adverse Events Treatment Adherence Benin

Coverage and Factors Associated with Acceptance and Satisfaction of Seasonal Malaria Chemoprevention in Six Health Zones in Benin

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Open Journal of Preventive Medicine 2024年第3期14卷 49-60页

作者： Cyriaque Affoukou Georgia Damien Thibaud Lègba Olarewadjou Richard Biaou Boni Géraud Padonou rock Aïkpon William Houndjo Camille Houetohossou Elysé Sohizoun Aurore Ogouyemi Badirou Aguèmon Community Health and Epidemiology Unit Faculty of Health Sciences University of Abomey-Calavi Cotonou Benin National Malaria Control Program of Benin Cotonou Benin Ministry of Health Cotonou Benin Laboratory of Epidemiology of Chronic and Neurological Diseases (LEMACEN) Faculty of Health Sciences University of Abomey-Calavi Cotonou Benin

Introduction: Seasonal malaria chemoprevention (SMC) was adopted in 2019 in two health zones in Benin where malaria transmission is very high. Positive results led to the extension of the intervention to other zones with additional financial support. Annual SMC campaigns from 2021 to 2023 were carried out in all six health zones in the Atacora and Alibori departments. In five years of implementation, various approaches have been developed on the basis of a communication plan facilitating buy-in and acceptance by all stakeholders. The aim of this study was to assess the effective coverage and acceptance of the SMC by their beneficiary populations in 2023. Methods: It was a cross-sectional study with an analytical focus. Data collection took place from November 30 to December 13, 2023. The study population consisted of children under 5 years of age residing in the departments of Atacora and Alibori in northern Benin. A total of 3573 children under 5 years of age were included in the study, and their parents or guardians were interviewed. Results: During the 2023 campaign, 87.7% of targets were reached by SMC administration and 100.00% of children had received at least one dose of SMC by the fourth visit. Effective therapeutic coverage of SMC was 70.55%, with 99.60% in BNK, 69.40% in KGS, 16.20% in MK, 56.10% in 2KP, 92.40% in NBT and 89.60% in TMC. This coverage was statistically related to child and respondent ages (p Conclusion: SMC is a strategy accepted by the population, and the main reasons for non-participation in SMC were dominated by the absence of mothers or babysitters when the agents visited.

关键词： Coverage Acceptance SMC Benin

Coverage and Factors Associated with Acceptance and Satisfaction of Seasonal Malaria Chemoprevention in Six Health Zones in Benin

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Improvement of GPS ambiguity resolution using prior height information. Part Ⅱ: The method of using quasi observation

Open Journal of Preventive Medicine（预防医学期刊） 2024年第3期 49页

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Journal of Central South University of Technology 2002年第3期9卷 260-266页

作者：朱建军 rock Santerre School of Info Physics and Geomatics Engineering Central South University Centre for Research in Geomatics Laval University Canada

This paper deals with the method of using quasi observation. In the paper a simple algorithm is developed for the adjustment computation with quasi observation at first. And then the ability of quasi observation to improve ambiguity search technique is studied in detail. The robustness of the method is also discussed. A method to determine the weight of quasi observation is proposed. The results show that a prior height can be taken as a quasi observation and used together with GPS observations. It can strengthen residual tests, especially in situation where there are fewer satellites in the sky. It also can change structure of incorrect solutions, which will theoretically make less incorrect solutions left in search space. At last the field tests are carried out to show that the proposed method is effective. The success rate of ambiguity resolution in the four field tests is improved significantly.

关键词： ambiquity resolution algorithm with quasi observation robustness

Structural and optical properties of periodically ordered ZnO nanowires

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Science China(Technological Sciences) 2009年第2期52卷 313-317页

作者： J.B.CUI Department of Physics and Astronomy, University of Arkansas at Little rock, Little rock, AR 72204, USA 1. Department of Physics and Astronomy University of Arkansas at Little Rock Little Rock AR 72204 USA

Periodically ordered ZnO nanowire arrays were fabricated by a combination of soft templates created by electron beam lithography and an electrochemical process. Individual ZnO nanowires were precisely placed in desired locations to form two-dimensional periodic structures with specific patterns. Scanning electron microscopy and light diffraction measurements confirmed the long-range ordered structures in the nanowire arrays. Variable temperature photoluminescence revealed both band edge and defect emissions. The obtained photonic structures may have potential applications in optical and optoelectronic devices.

关键词： Zinc oxide nanowires ordered structure optical property

A New Young Wall Realization of B(λ) and B(∞)

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Algebra Colloquium 2023年第3期30卷 503-540页

作者： Zhaobing Fan Shaolong Han Seok-Jin Kang Young rock Kim Harbin Engineering University Harbin 150001China Korea Research Institute of Arts and Mathematics Asan-siChungcheongnam-do31551Korea Graduate School of Education Hankuk University of Foreign StudiesSeoul 02450Korea

Using new combinatorics of Young walls,we give a new construction of the arbitrary level highest weight crystal B(λ)for the quantum affine algebras of types A^((2))_(2n),D^((2))_(n+1),A^((2))_(2n−1),D^((1))_(n),B^((1))_(n) and C^((1))_(n).We show that the crystal consisting of reduced Young walls is isomorphic to the crystal B(λ).Moreover,we provide a new realization of the crystal B(∞)in terms of reduced virtual Young walls and reduced extended Young walls.

关键词： quantum affine algebra crystal basis highest weight crystal Young wall

Investigation of impact of DC component on breakdown characteristics for different electric fields under composite AC&DC voltage

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High Voltage 2022年第2期7卷 279-287页

作者： Mehmet Murat Ispirli Özcan Kalenderli Florian Seifert Michael rock Bülent Oral Group for Lightning and Surge Protection Technische Universität IlmenauIlmenauGermany Electrical Engineering Department Istanbul Technical UniversityIstanbulTurkey Research Unit High‐Voltage Technologies Technische Universität IlmenauIlmenauGermany Electrical‐Electronic Engineering Department Marmara UniversityIstanbulTurkey

The valve side of the converter in the high‐voltage direct current is subjected to mixed voltages such as composite AC&DC *** this study,the effects of the homo-geneity of electric field on breakdown voltage were investigated for different�DC component amplitudes of the composite *** field efficiency factor was calcu-lated using mean and maximum field strengths for all of *** of breakdown voltage of air was examined under the composite AC&DC voltage for different ratios�*** one result of the study,the breakdown occurs at the positive half‐wave of the AC voltage despite−DC voltage being applied due to positive corona discharge *** breakdown point is named as the polarity change *** breakdown voltage increases with the decrease of DC voltage component up to polarity change point in non‐uniform electric *** less uniform electric field,the AC breakdown voltage was measured slightly higher than the DC breakdown *** less uniform electric field,as the ratio of the applied AC voltage to DC voltage increases,the breakdown voltage gradually approaches the AC breakdown *** result is similar to the result ob-tained for the+DC component in non‐uniform electric field experiments.

关键词： breakdown composite component

Modified Mohr-Coulomb strength criterion considering rock mass intrinsic material strength factorization

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Mining Science and Technology 2010年第5期20卷 701-706页

作者： ZHANG Qiang,WANG Shuilin,GE Xiurun,WANG Hongying State Key Laboratory of Geomechanics and Geotechnical Engineering,Institute of rock and Soil Mechanics,Chinese Academy of Sciences,Wuhan 430071,China [a] State Key Laboratory of Geomechanics Geotechnical Engineering Institute of Rock Soil Mechanics Chinese Academy of Sciences Wuhan 430071 China

With the increase of mining depth of mineral resources,the rock mass stress state is being more and more *** rock mass show different features,namely,with the increase of hydrostatic pressure,rock mass failure mode turns from brittle tension failure to structure ductile failure and its limit strength also *** restriction of minimal principal stress on the initiation and development of microcrack and the change of micro-unit stress state by the intermediate principal stress play a decisive role in the increase of rock mass limit *** on the rock mass failure behavior law under complex stress state and the σ2-dependence on the rock mass strength,we proposed a Modified Mohr-Coulomb(M-MC) strength criterion which is smooth and ***,the M-MC criterion is validated by multiaxial test data of eight kinds of rock *** also compared the fitting results with Mohr-Coulomb criterion(MC).It shows that the new criterion fits the test data better than the Mohr-Coulomb *** the M-MC strength criterion well reveals the rock mass bearing behavior and can be widely used in the rock mass strength *** results can provide theoretical foundations for stability analysis and reinforcement design of complex underground engineering.

关键词： rock mass strength criterion Mohr-Coulomb criterion multiaxial test failure mode underground engineering