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A Hyper-ellipsoid Model for Metallurgical Process Modelling by Genetic Algorithm

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Journal of Materials Science & technology 1998年第6期14卷 567-568页

作者： Li, JF Li, CH Chen, ny Lu, t Chinese Acad Sci Shanghai Inst Met Shanghai 200050 Peoples R China Univ SW Louisiana Lafayette LA 70504 USA

A hyper-ellipsoid model, using genetic algorithm as method of computation, has been proposed to be used in certain metallurgical processes. It is especially suitable for the modelling of the metallurgical processes wi... 详细信息

关键词： Metallurgy

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Projected Changes in the Climate Zoning of Côte d’Ivoire

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Atmospheric and Climate Sciences 2024年第1期14卷 62-84页

作者： Mamadou Diarrassouba Adama Diawara Assi Louis Martial Yapo Benjamin Komenan Kouassi Fidèle Yoroba Kouakou Kouadio Dro touré tiemoko Dianikoura Ibrahim koné Arona Diedhiou Laboratory of Sciences Matter Environment and Solar Energy (LASMES) University Félix Houphou&#235t-Boigny Abidjan C&#244te d’Ivoire Geophysical Station of Lamto (GSL) N’douci C&#244te d’Ivoire Laboratory of Fundamental and Applied Physics University Nangui Abrogoua Abidjan C&#244te d’Ivoire Université Grenoble Alpes (UGA) Institut des Géosciences de l’Environnement (IGE) Institut de Recherche pour le Développement (IRD) Centre National de Recherche Scientifique (CNRS) Institut National Polytechnique (INP) Grenoble France African Centre of Excellence on Climate Change Biodiversity and Sustainable Agriculture (ACE-CCBAD)/University Felix Houphou&#235t-Boigny (UFHB) Abidjan C&#244te d’Ivoire

this study assesses the projected changes in the climate zoning of Côte d’Ivoire using the hierarchical classification of principal components (HCPC) method applied to the daily precipitation data of an ensemble of 14 CORDEX-AFRICA simulations under RCP4.5 and RCP8.5 scenarios. the results indicate the existence of three climate zones in Côte d’Ivoire (the coastal, the centre and the north) over the historical period (1981-2005). Moreover, CORDEX simulations project an extension of the surface area of drier climatic zones while a reduction of wetter zones, associated with the appearance of an intermediate climate zone with surface area varying from 77,560 km2 to 134,960 km2 depending on the period and the scenario. these results highlight the potential impacts of climate change on the delimitation of the climate zones of Côte d’Ivoire under the greenhouse gas emission scenarios. thus, there is a reduction in the surface areas suitable for the production of cash crops such as cocoa and coffee. this could hinder the country’s economy and development, mainly based on these cash crops.

关键词： Climate Projection Climate Zone Principal Component Analysis Hierarchical Classification on Principal Components CORDEX Côte d’Ivoire

Prevalence, Maternal and Perinatal Prognosis of Breech Delivery Compared to that of the Vertex in 242 Cases for 484 Controls at Ségou Hospital in Malti

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Open Journal of Obstetrics and Gynecology 2024年第9期14卷 1414-1421页

作者： tidiani traoré Famakan Kané Abdoulaye Kassogué Seydou traoré Seydou Z. Dao Balilé Harber Sabré koné Kassoum Sidibé Brahima Donigolo Babou traoré Adama Coulibaly Abdrhamane Diarisso Alima Sidibé Mamadou Sima Augustin théra Youssouf traoré Ibrahima teguété Niani Mounkoro Ministry of Health in Bamako Nianakoro Fomba Hospital Segou Mali Regional Health Department of Segou District Hospital Bla Mali Regional Health Department of Koutiala Reference Health Center Koutiala Mali Regional Health Department of Bamako Reference Health Center Commune II Bamako Mali Ministry of Health in Bamako Fousseyni Daou Hospital Kayes Mali Ministry of Health in Bamako Point G University Hospital Center Bamako Mali Ministry of Health in Bamako Gabriel Toure University Hospital Center Bamako Mali

Introduction: Breech birth has always been a subject of great interest because of its risks of perinatal morbidity and mortality. Aim: the aim of our study was to compare the maternal and perinatal prognosis of breech delivery with that of vertex delivery. Patients and Method: this was a retrospective case-control analytical study carried out in the obstetrics and gynaecology department of Ségou hospital over a 2-year period from 1 January 2020 to 31 December 2021, involving 242 breech deliveries compared with 484 top deliveries with a live single foetus without foetal malformation of gestational age ≥ 35 SA. the statistical tests used were: chi² (p Results: the frequency of breech delivery was 3.3%, with a predominance of caesarean section for breech presentation (64.88%) compared with 32.85% for vertex (P: 0.00;CI: (0.191 - 0.367). the perinatal prognosis of fetuses with breech presentations was marked by a higher rate of neonatal asphyxia (Apgar score Conclusion: Breech birth is relatively rare in our department. It carries a higher risk of maternal morbidity and neonatal morbidity than breech delivery. However, the vital prognosis for the mother was identical in both groups.

关键词： Delivery Breech Vertex Prognosis Mali

Design,simulation,and testing of a tunable MEMS multi-threshold inertial switch

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Microsystems & Nanoengineering 2024年第2期10卷 37-46页

作者： Qiu Xu Rodrigo t.Rocha Yousef Algoos Eric Feron Mohammad I.Younis Faculty of Electronic Information Engineering Huaiyin Institute of TechnologyHuai’an223003PR China Computer Electrical and Mathematical Science and Engineering DivisionKing Abdullah University of Science and TechnologyThuwal23955-6900Saudi Arabia Piezoelectric Microsystem technologies Silicon Austria LabsVillach9524Austria Physical Sciences and Engineering Division King Abdullah University of Science and TechnologyThuwal23955Saudi Arabia Mechanical Engineering Department State University of New YorkBinghamtonNY13902USA

this paper presents a tunable multi-threshold micro-electromechanical inertial switch with adjustable threshold *** demonstrated device combines the advantages of accelerometers in providing quantitative acceleration measurements and g-threshold switches in saving power when in the inactive state upon experiencing acceleration below the *** designed proof-of-concept device with two thresholds consists of a cantilever microbeam and two stationary electrodes placed at different positions in the sensing *** adjustable threshold capability and the effect of the shock duration on the threshold acceleration are analytically investigated using a nonlinear beam *** are shown for the relationships among the applied bias voltage,the duration of shock impact,and the tunable *** fabricated prototypes are tested using a shock-table *** analytical results agree with the experimental *** designed device concept is very promising for the classification of the shock and impact loads in transportation and healthcare applications.

关键词： tunable acceleration testing

Frequency of the C677t Polymorphism of MtHFR, G20210A of Prothrombin and R506Q of Factor V Leiden in type 2 Diabetics in Abidjan

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tHE EVOLUtION OF tECHNOLOGY DEVELOPMENt At GE CORPORAtE R & D

Open Journal of Genetics（遗传学期刊） 2024年第1期 13页

作者： N’Guessan-Blao Rebecca Yapo Vincent Yayo-Ayé Mireille Adjambri Eusèbe koné-koné Fatoumata Sawadogo Duni

来源：博看期刊评论

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Acta Metallurgica Sinica(English Letters) 1996年第6期9卷 493-496页

作者： t.B.Cox(GE Corporate Research & Development, Niskayuna, ny 12309, USA ) GE Corporate Research & Development Niskayuna United States

A brief review of the nearly 100 year history of Corporate Researeh and Development at GE is presented. Observations on the changing nature and relevance of industrial research are discussed. Examples of current technology projects for aircraft engine materials are reviewed. Emphasis of these projects is placed on high performance,low cost and high quality.

关键词： spray forming,clean melt turbine disks

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A Registry-Based Observational Study on the Maternal and Fetal Outcomes of COVID-19 Patients in Hong kong,China

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Maternal-Fetal Medicine 2024年第3期6卷 156-163页

作者： Hillary HY Leung teresa WL Ma Florrie ny Yu Meliza CW kong tsz Kin Lo Pauline PL So Wing-Cheong Leung Wendy Shu Ka Wang Cheung Sakita Moungmaithong Chi Chiu Wang Liona C.Poon Department of Obstetrics and Gynaecology The Chinese University of HongKongHong Kong 999077China Department of Obstetrics and Gynaecology Queen Elizabeth HospitalHong Kong 999077China Department of Obstetrics and Gynaecology United Christian HospitalHong Kong 999077China Department of Obstetrics and Gynaecology Princess Margaret HospitalHong Kong 999077China Department of Obstetrics and Gynaecology Tuen Mun HospitalHong Kong 999077China Department of Obstetrics and Gynaecology Kwong Wah HospitalHong Kong 999077China Department of Obstetrics and Gynaecology Pamela Youde Nethersole Eastern HospitalHong Kong 999077China Department of Obstetrics and Gynaecology Queen Mary HospitalHong Kong 999077China

Objective:to report the clinical maternal and fetal outcomes of pregnant women with coronavirus disease 2019(COVID-19),along with any associated pregnancy complications,in Hong kong,China,and to assess the impact of COVID-19 vaccination on these ***:this prospective registry-based observational study included pregnant women who were recruited through convenient sampling and had a laboratory-confirmed severe acute respiratory syndrome coronavirus 2 infection with a cycle threshold(Ct)value result available on admission to eight local hospitals in Hong kong,*** on clinical symptoms,laboratory results,medical treatments,delivery timing and mode,and pregnancy complications were extracted from the Hospital Authority’s electronic medical record ***,fetal,and pregnancy outcomes were compared between unvaccinated pregnant women with COVID-19 and those who had received at least one dose of COVID-19 vaccine before *** continuous variables and categorical variables were analyzed using the Mann-Whitney U test and the Pearson’s chi-squared test respectively.A P value less than 0.05 was considered statistically ***:A total of 164 pregnant women were included,of whom 78(47.56%)were ***-19 was diagnosed before 28 weeks’gestation in 30(18.29%),while 134(81.71%)were diagnosed at or after 28 weeks’***-two(37.80%)women received at least one dose of COVID-19 *** were no significant differences between vaccinated and unvaccinated groups in the time interval between COVID-19 diagnosis and delivery,the Ct value,and the gestational age at infection onset or delivery(P>0.05).the majority of women were symptomatic at diagnosis regardless of vaccination status 55(88.71%)in vaccinated group vs.78(76.47%)in unvaccinated group(P=0.052).Symptoms did not significantly differ between groups except for cough(62.90%vs.47.06%,P=0.049).the overall rate of severe COVID-19 in pregnant women was *** t

关键词： COVID-19 Maternal outcomes Fetal outcomes Pregnancy complications Severe COVID-19

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Shoaling Internal Solitary Waves and the Formation of Boluses

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Open Journal of Fluid Dynamics 2024年第2期14卷 65-82页

作者： Hooman Enayati Brian t. Helenbrook Department of Mechanical Engineering Lafayette College Easton PA USA Department of Mechanical & Aerospace Engineering Clarkson University Potsdam NY USA

An internal solitary wave of elevation in a two-layer density stratified system of an incompressible, viscous and homogeneous fluid was studied. the run-up of a wave of elevation encountering different slopes was investigated numerically based on solving the continuity, Navier-Stokes and convective-diffusion equations within the Boussinesq approximation. the commercial software COMSOL Multiphysics was used to conduct the numerical simulations. For gradual shoals, a bolus formed that transported dense fluid up the shoal. the bolus disappeared when it reached its maximum height on the slope due to the draining of the dense fluid. Various shoal angles were simulated to detect the critical angle above which a bolus does not form. An angle of 30 or less resulted in the formation of a bolus. In addition, the simulations demonstrated that the size of the bolus induced by shallower slopes was larger and that the vertical height traveled by the bolus was insensitive to the slope of the shoal.

关键词： Internal Solitary Waves COMSOL Multiphysics Wave Breaking

Impact of Beekeeping on the Wild Bee Diversity in Northern Ivory Coast(West Africa)

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Research in Ecology 2024年第1期6卷 6-13页

作者： Drissa Coulibaly Mouhamadou koné Yalamoussa tuo Kolo Soro Kouakou Hervé Koua Department of Animal Biology Biological Sciences UnityUniversity Peleforo Gon CoulibalyBP 1328KorhogoIvory Coast Biosciences Unity Department of ZoologyAnimal Biology and EcologyUniversity Felix Houphouët-Boigny22 BP 1611 Abidjan 22Ivory Coast

In Ivory Coast,beekeeping takes an important place among the major economic *** contributes to improv-ing the population’s livelihoods thanks to its derived products which are honey,propolis,wax and royal ***-ever,the installation of honey bee hives could put pressure on wild bee species,which often live ***,these wild bees are excellent pollinators of cultivated and wild *** study aimed to assess the effect of honey bee hives on the diversity of wild *** methodology approach consisted of capturing bees in three different plots inside the forest fragment of the botanical garden located at the University Peleforo Gon *** first plot was chosen approximately from 10 m to an apiary containing ten *** two other plots were chosen to be 200 m and 400 m from the apiary,*** were captured once a month for three months using pan traps(UV—blue,yellow and white).A total of 17 bee species belonging to three families(Apidae,Megachilidae and Halictidae)were *** furthest plot from the apiary was the most diverse(H’=2.49)and that near the apiary was the least diverse(H’=0.11).Only,two wild bee species,Hypotrigona *** thrinchostoma petersi,persisted inside the plot nearby the apiary where honey bees were most *** furthest plots from the apiary seem to have the highest diversity of wild *** findings are very relevant because they can be used for the policies of conservation of wild bees and the management of beekeeping activities.

关键词： Honey bee Apiary Hive Conservation Korhogo