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Impact of Global Warming on Intensity-Duration-Frequency (IDF) Relationship of Precipitation: A Case Study of Toronto, Canada

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Open Journal of Modern Hydrology 2016年第1期6卷 1-7页

作者： erick Carlier Jamal El Khattabi Polytech’lille Laboratoire de Génie Civil et Géo-Environnement (LGCgE) Université Lille 1 Sciences et Technologie Villeneuve d’Ascq France

Annual maximum rainfall intensity for several duration and return periods has been analyzed according to the Gumbel distribution. The Intensity-Duration-Frequency (IDF) curves before and after 1980 have been computed and compared. For the city of Toronto, it is shown that the rainfall intensities after 1980 are lower than those from before this date. This is especially clear for those of short duration. Comparing our results with those of other authors, it appears that, for the moment, no general law on the impact of global warming on the curves intensity duration frequency cannot be made. It appears that the impact of global warming on rainfall varies with geographic location and that it is not possible to draw some general conclusions across the planet.

关键词： Climate Change Duration Frequency Intensity Rainfall

Peroxymonosulfate decomposition by homogeneous and heterogeneous Co: Kinetics and application for the degradation of acetaminophen

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Journal of Environmental Sciences 2020年第7期32卷 30-40页

作者： Oscar M.Rodríguez-Narvaez Ruwini D.Rajapaksha Mahinda I.Ranasinghe Xuelian Bai Juan Manuel Peralta-Hernández erick R.Bandala Departamento de Química DCNEUniversidad de GuanajuatoGuanajuato C.P.3C6040Mexico Department of Chemistry New Mexico Institute of Mining and TechnologySocorroNM 87801USA Division of Hydrologic Sciences Desert Research InstituteLas VegasNV 89119-7363USA

Peroxymonosulfate(PMS)decomposition,hydroxyl radical(·OH)generation,and acetaminophen(ACT)degradation by the Co/PMS system using homogeneous(dissolved cobalt)and heterogeneous(suspended Co3O4)cobalt were *** the homogeneous process,>99%PMS decomposition was observed and 10 mmol/L of·OH generation was produced using 5 mmol/L of PMS and different dissolved cobalt concentrations after 30 min.A dissolved cobalt concentration of 0.2 mmol/L was used to achieve>99%ACT degradation using the homogeneous *** the heterogeneous process,60%PMS decomposition and negligible·OH generation were observed for 5 mmol/L of the initial PMS concentration using 0.1 and 0.2 g/L of *** of ACT greater than 80%was achieved for all experimental runs using 5 mmol/L of the initial PMS concentration independently of the initial Co3O4 load *** the heterogeneous process,the best experimental conditions for ACT degradation were found to be 3 mmol/L of PMS and 0.2 g/L of Co3O4,for which>99%ACT degradation was achieved after 10 *** negligible·OH was produced by the Co3O4/PMS process,a second-order kinetic model was proposed for sulfur-based free radical production to allow fair comparison between homogeneous and heterogeneous *** the kinetic data and the reaction by-products identified,a mechanistic pathway for ACT degradation is suggested.

关键词： Co3O4 PMS decomposition Fenton-like reaction Acetaminophen ·OH production

First Report of a Successful Development of Yam Hybrids(Dioscorea alata L.)from Lyophilized and Long-Term Stored Pollens

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国际实验植物学杂志(英文) 2023年第10期92卷 2861-2874页

作者： erick Malédon Elie Nudol Christophe Perrot Marie-Claire Gravillon Ronan Rivallan Denis Cornet Hâna Chair Komivi Dossa CIRAD UMR AGAP InstitutPetit BourgGuadeloupe97170France UMR AGAP Institut Univ MontpellierCIRADINRAEInstitut AgroMontpellierF-34398France CIRAD UMR AGAP InstitutMontpellierF-34398France

Various biological constraints including erratic and asynchronous flowering between male and female plants hinder successful hybrid development and genetic gains in greater yam breeding ***,pollen storage has gained much attention to facilitate artificial pollinations and increase the genetic *** 4-year study aimed at developing a practical long-term pollen storage technique for the successful development of yam *** pollens were collected from two Dioscorea alata males,then lyophilized(two lyophilization treatments were applied),followed by storage at room temperature(24℃–25℃)for 12 ***,the lyophilized and stored pollens were tested for viability by crossing with four female *** results showed that lyophilization is effective for achieving viable pollens after 12 months of *** 1(48 h drying)showed higher pollen germination and fertility rates than Treatment 2(72 h drying).Although we observed a reduction in viability of lyophilized pollens after 12 months of storage,we generated hybrid seedlings with success rates from 12%to 21%compared to 21%–31%when using fresh *** testing based on molecular genotyping confirmed the hybrid status of the obtained seedlings,which grew well in a *** is a practical approach for a long-term storage of greater yam pollen *** protocol will positively impact yam breeding programs particularly in developing countries.

关键词： Yam freeze-drying pollen conservation genetic gain

Use of fly and bottom ashes from a thermoelectrical plant in the synthesis of geopolymers:Evaluation of reaction efficiency

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Energy Geoscience 2021年第2期2卷 167-173页

作者： Leidy J.Jaramillo Nieves Fabio Elyseu Silviany Goulart Mariana de Souza Pereira erick Zabot Valvassori Adriano Michael Bernardin Ceramic Materials Group Universidade do Extremo Sul CatarinenseAv.Universitaria 110588806-000CriciumaSanta CatarinaBrazil

The use of by-products as raw materials in the manufacturing of industrial products has risen in the last years because of environmental *** example is the use of coal ashes from thermalelectrical plants in the production of geopolymer–a green cement made by mixing aluminosilicate with alkaline *** this study,fly and bottom ashes from a thermal-electrical unit were used as sources of aluminosilicate in the synthesis of geopolymers.A mixture of sodium hydroxide(10 mol/L)and sodium silicate(SiO_(2)/Na_(2)O ratio of 2.2)was used as the alkaline *** type(fly or bottom ash)and content of the ash were the variables in the *** ashes were characterized by X-ray fluorescence(XRF),X-ray diffraction(DRX),particle size distribution(PSD),specific surface area(BET),and thermal analysis(DTA/TGA).The ash-based geopolymer samples were measured to obtain their compressive strength after *** evolution of the geopolymerization process was also assessed based on final alkali concentration *** results show that it is possible to obtain geopolymers using coal ashes as raw materials with high solid *** compressive strength for the bottom ash geopolymer after 90 days of curing is 35 *** low concentration of unreacted alkalis after curing(1.5×10^(-3)e 3.5×10^(-3)M)corresponds to high efficiency of the geopolymerization reaction.

关键词： Coal ash Geopolymer Industrial by-product Geopolymerization reaction

A Probabilistic Approach for Spring Recession Flows Analysis

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Open Journal of Modern Hydrology 2015年第2期5卷 11-18页

作者： erick Carlier Jamal El Khattabi University Lille 1-Sciences and Technologies Polytech’lille LGCgE Villeneuve d’Ascq France

Spring recession flows are analyzed from a Bayesian point of view. Two general equations are derived and it is shown that the classical formulas of recession flow are particular cases of both equations. It is shown that most of the recession equations reflect a non-Markovian process. That means that the groundwater storage exhibits a memory effect and that there is a nonlinear relationship between flow and storage. The Bayesian approach presented in this paper makes it possible to give a probabilistic meaning to recession flow equations derived according to a physical approach and can be an alternative to the study of complex reservoir for which the physical processes governing recession flow are unclear. Twelve spring recession flow series are analysed in order to validate the probabilistic approach presented in this paper and a conceptual model of storage-outflow is proposed.

关键词： Recession Spring Groundwater Bayesian Approach Markovian Process

Identification and Mapping of Essential Fish Habitats Using Remote Sensing and GIS on Lake Victoria, Kenya

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Journal of Geoscience and Environment Protection 2021年第10期9卷 91-109页

作者： Mark Kipkurwa Boitt erick Otieno Aete Institute of Geomatics GIS and Remote Sensing (IGGReS) Dedan Kimathi University of Technology Nyeri Kenya Department of Geomatic Engineering and GIS (GEGIS) Jomo Kenyatta University of Agriculture and Technology Nairobi Kenya

Fisheries in Lake Victoria have been threatened by declining fish stocks and diversity, environmental degradation due to increased input of pollutants, industrial and municipal waste, overfishing and use of unapproved fishing methods, infestation by aquatic weeds especially water hyacinth, de-oxygenation and a reduction in the quantity and quality of water. Remote sensing and GIS are essential tools in detection of fishing grounds which is important in providing fish sustainability for human beings and allows fishing grounds detection at minimal cost and optimizes effort. This research tends to identify the most favorable both environmentally and ecologically satisfactory factors which favor fish breeding and growth. The main aim of the study was to identify habitat variables that promote fish breeding and growth to maturity including the extraction of environmental variables from Landsat 8 images for the study period and using suitability index derived from fishery data. The study concentrated on establishing suitability ratings in different parts of Lake Victoria using lake surface temperature and chlorophyll-a levels. The study was conducted for months;January, May and December 2019 on Lake Victoria (limited by the availability of recent data). The factors were analysed and the favorable regions mapped satisfying the conditions for fish breeding. The output obtained illustrated the availability of suitable and habitable zones within the lake using satellite imagery and the suitability index. The fish catch data and satellite derived variables were used to determine habitat suitability indices for fish during January, May and December 2019. More than 90% of the total catch was found to come from the areas with sea surface temperature of 23.0˚C - 28.3˚C and chlorophyll-a concentration between 0.72 -

关键词： Catch Per Unit Effort Potential Fishing Zones Geographic Information Systems High Resolution Satellite Image Habitat Suitability Index

中国-巴西经贸关系的现状和评价：资源富裕国的发展之路

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中国-巴西经贸关系的现状和评价：资源富裕国的发展之路

作者： erick Tjong 复旦大学

学位级别：硕士

自1978年之来,中国的经济发展在全球范围内产生了巨大影响。工业化发展中国家因此出现了关于中国发展对当地经济的影响的讨论。作为一个南美洲国家,巴西在地理位置上距离中国十分遥远。尽管如此,这个全球现象还是极大地影响了巴西。各... 详细信息

自1978年之来,中国的经济发展在全球范围内产生了巨大影响。工业化发展中国家因此出现了关于中国发展对当地经济的影响的讨论。作为一个南美洲国家,巴西在地理位置上距离中国十分遥远。尽管如此,这个全球现象还是极大地影响了巴西。各项经济指标显示,在过去十年内,中国从一个对于巴西来说遥远而次要的国家,迅速发展成为今日巴西的第一贸易伙伴。然而“中国崛起”对于巴西这样的国家来说究竟意味着什么?有观点称中国“对资源的渴求”会给巴西的经济结构带来深刻的变化,甚至可以被称作是“资源诅咒”。有迹象表明巴西面临着“去工业化”和对资源依赖的加剧等状况。在这些观点为巴西为了满足中国的需求量而过度依赖资源而担忧时,也有人强调两国的经济互补性,即中国对巴西资源的需求将带来其投资给巴西带来的收益。到目前为止,巴西对此现象的反应是不确定的,尽管它倾向于加深和与中国乃至东亚的伙伴关系。本文分析巴西发展中巴经贸关系的一些方案,以及每个选择将会造成的结果。笔者的主张是,资源丰富对于巴西来说不一定是个“诅咒”。为了避免这个“诅咒”,巴西恰恰需要适应中国的崛起及中巴关系的发展,例如实施选择性的产业政策;更好地抓住中国投资带来的收益;以及更加明智地管理资源出口来的财富等——通过妥善制定战略政策来保证中巴关系发展对两国社会均产生积极的影响。

关键词：中国-巴西经贸关系中国与发展中国家国际贸易和初级产品出口资源诅咒发展模式

Constraints on Dynamical Dark Energy with Precision Cosmological Data

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Journal of Modern Physics 2018年第2期9卷 302-313页

作者： erick Almaraz Axel de la Macorra Instituto de Física Universidad Nacional Autónoma de México Ciudad de México México

We present a Dark Energy (DE) model based on a scalar field with an inverse power law potential (IPL) V(∅)=M4+n∅−n. We consider three different models n=1/2, n=3/4 and n=1 and we vary the value of M and the initial amount of energy density Ω∅at the scale factor ac. We obtain a time dependent equation of state (EoS) , with w∅=1/3 at early times for a scale factor ac with a steep transition to w∅=1 at , , , lasting a long period of time and a subsequent descent w∅=-1 to for to finally grow to w∅= -0.906, w∅=-0.932, w∅=-0.924 for n=1/2, n=3/4 and n=1 respectively. The values of M and Ω∅(ac) are M(eV)= 4.63,127.31,2465.46 and Ω∅(ac)=0.038,0.148,0.227 for n= 1/2, n= 3/4 and n=1 respectively. We show the differences in the evolution of H, the CMB and Matter power spectra, and the redshift space distortion (RSD)parameter. Precision cosmological data allow us to test the dynamics of Dark Energy and we obtain in all three cases a reduction of ?compared to ∧CDM with and an equivalent fit for CMB and SNIa data.

关键词： Cosmology Dark Energy Scalar Fields

Bicuspid Aortic Valve Disease in Turner Syndrome: A Meta-Analysis of Prevalence

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International Journal of Clinical Medicine 2022年第7期13卷 276-286页

作者： erick Thokerunga Yahya-Abdullahi Ali Christopher Ntege Department of Clinical Laboratory Medicine Center for Gene Diagnosis Zhongnan Hospital of University Wuhan China Department of Cardiology First Affiliated Renmin Hospital of Wuhan University Wuhan China Department of Radiology and Nuclear Medicine Zhongnan Hospital of Wuhan University Wuhan China

Turner syndrome patients partially or completely lack the X chromosome. 1 - 2500 female live births are affected. Clinical features include webbed neck, short stature, broad chest etc. Bicuspid aortic valve disease (BAV) occurs in more than 30% of Turner syndrome patients causing significant morbidity and mortality. We aimed to establish a more reliable estimate of the prevalence of BAV in Turner syndrome. PubMed, Embase and PsycINFO databases were searched until 2022. Review Manager (RevMan 5.4.1) and the JASP software (0.16.00) were used for meta-analysis. 15 studies with a total of 3189 patients were combined. The pooled prevalence of BAV in Turner syndrome was 22.0% (95% CI: 15.0% - 29.0%). Sub group analysis by 45, X0 karyotype and age had prevalence of 24.0% and 8% respectively. The studies had high heterogeneity and possible publication biases. In summary, the study established that the prevalence of BAV in Turner syndrome patients diagnosed by echocardiogram, CT and MRI scans, is 22.0%, and 24% in patients with true monosomy 45, X0 karyotypes. Routine BAV exam should pay particular attention to monosomy 45, X0 karyotype patients, and where possible, CT and MRI should always accompany echocardiography for BAV screening, especially for pediatrics.

关键词： Bicuspid Aortic Valve Turner Syndrome Meta-Analysis Prevalence