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Soil and altitude drive diversity and functioning of Brazilian Páramos(campo de altitude)

Journal of Plant Ecology 2017年第5期10卷 771-779页

作者： Andreza Viana Neri gladson ramon alves borges João Augusto alves Meira-Neto Luiz Fernando Silva Magnago Ian Michael Trotter Carlos Ernesto GRSchaefer Stefan Porembski Departamento de Biologia Vegetal Laboratório de Ecologia e Evolução de PlantasUniversidade Federal de ViçosaPH RolfsS/NCampus UniversitárioViçosaMinas Gerais 36570-900Brazil Departamento de Biologia Setor de Ecologia e ConservaçãoUniversidade Federal de LavrasLavrasMinas Gerais 37200-000Brazil Departamento de Economia Rural Universidade Federal de ViçosaPH RolfsS/NCampus UniversitárioViçosaMinas Gerais 36570-900Brazil Departamento de Solos Universidade Federal de ViçosaPH RolfsS/NCampus UniversitárioViçosaMinas Gerais 36570-900Brazil Allgemeine und Spezielle Botanik Institut für BiowissenschaftenUniversität RostockWismarsche Str.8D-18051 RostockGermany

Aims the vegetation on Brazilian Páramos consists of assemblages that are driven mainly by the influence of strong environmental *** is very important to understand the effect of environmental varia-tion on taxonomic diversity and on functional *** the lack of information about the functional diversity in Brazilian Páramos,we analyzed for the first time the effects of altitude and edaphic attributes on functional traits,as well as on taxonomic and functional *** also wanted to answer the questions:Which ecological strategies are favorable in high-altitude grassland?Does soil attributes determine distributions of traits in high-altitude grassland?considering the studied altitudinal gradient is altitude an important variable in the community assembly?Methods the study was conducted on three mountains:Mammoth(1850 m),Elephant(1790 m)and totem(1690 m)in Serra do Brigadeiro State Park,Minas Gerais State,*** mountains represent the‘Serra das cabeças’,a smaller ridge that is surrounded by the Atlantic Forest,one of the 25 hotspot of *** samples were taken using 100 plots of 1 m2 per mountain that were randomly *** plants except mosses were *** taxonomic diversity was evaluated using richness,Shannon diversity,effective number of species and Pielou *** the functional diver-sity,we considered the functional richness,functional evenness and functional *** linear models(GLM/Poisson and quasi-Poisson)were used to evaluate the effect of abiotic variables(altitude,soil depth and soil chemical attributes)on biotic variables(number of species and individuals,life form,dispersal and fruit type)and ordinary least squares regression to evaluate the effect of abiotic variables on the functional and taxonomic *** Findingsthe soil variables presented a considerable edaphic gradient associated with *** soil in Serra das cabeças plays an important role for the

关键词： mountain conservation vegetation islands functional diversity life form highland grassland functional traits

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Lightweight and Secure Mutual Authentication Scheme for IoT Devices Using CoAP Protocol

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Computer Systems Science & Engineering 2022年第5期41卷 767-780页

作者： S.gladson Oliver T.Purusothaman Department of Information Technology Government College of TechnologyCoimbatore641013India Department of Electronics and Communication Engineering Government College of TechnologyCoimbatore641013India

Internet of things enables every real world objects to be seamlessly integrated with traditional *** objects of real world are enhanced with capability to communicate,computing capabilities and standards to interoperate with existing network and these entities are resource constrained and vulnerable to various security *** number of research works are being carried out to analyze various possible attacks and to propose standards for securing communication between devices in internet of things(IoT).In this article,a robust and lightweight authentication scheme for mutual authentication between client and server using constrained application protocol is *** of things enables devices with different characteristics and capabilities to be integrated with *** heterogeneous devices should interoperate with each other to accumulate,process and transmit data for facilitating smart *** growth of IoT applications leads to the rapid growth of IoT devices incorporated to the global network and network traffic over the traditional *** scheme greatly reduces the authentication overhead between the devices by reducing the packet size of messages,number of messages transmitted and processing overhead on communicating *** of this authentication scheme against attacks such as DoS(denial of service),replay attacks and attacks to exhaust the resources are also *** transmission time reduced upto 50%of using proposed techniques.

关键词： IoT CoAP AES encryption message transmisssion

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Online Advertising and Customer Satisfaction of E-Tailing Firms in Nigeria

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Intelligent Information Management 2018年第1期10卷 16-41页

作者： N. gladson Nwokah Doris Ngirika Department of Marketing Faculty of Management Sciences Rivers State University Port Harcourt Nigeria

This study examined the Impact of Online Advertising on Customers Satisfaction of E-tailing Firms in Nigeria. A survey research design was adopted. The source of data used in this study was mainly primary data from the issuance of questionnaire and secondary data from the review of relevant literature bothering on both variables which formed the basis for the argument. Out of a total of three hundred and eighty four (384) copies of questionnaire distributed, two hundred and eighty five (285) copies was used for analysis and analyzed using Spearman’s Rank Order Correlation Coefficient with the help of Statistical Package for Social Sciences (SPSS). The findings of the study reveal amongst others that there is a positive and strong relationship between online advertising and customers’ satisfaction;and online advertising significantly affects customer satisfaction. The study concludes that online advertising influenced satisfaction of the customers to a strong extent. However, online advertising is a key determinant of customer satisfaction as it is considered as a point of interaction between customers and the company from which they buy their products. A heuristic model was proposed to show our contribution to knowledge that the relationship between e-mail marketing and measures of customer satisfaction is very strong and is moderate on all other tested hypotheses. And the study recommends that advertising managers of e-tailing firms must develop and formulate e-mail marketing programs that will satisfy the needs of consumers and advert should be placed on stations and places where consumers can easily identify with them and make a purchase. Suggestions for further studies were outlined.

关键词： Online Advertising Customers Satisfaction E-Tailing Nigeria

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商业银行功能对坦桑尼亚国际贸易的影响研究

商业银行功能对坦桑尼亚国际贸易的影响研究

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作者： Gladness gladson Matolo 浙江科技学院

学位级别：硕士

这项研究调查了商业银行（银行）对国际贸易的影响。由于国际标准组织,国际货币基金组织和其他经济一体化联盟在洗钱方面的金融法规,汇率政策和贸易融资规则在实践中,坦桑尼亚与其他国家之间的贸易活动需要获得认可和有执照的银行。文... 详细信息

这项研究调查了商业银行（银行）对国际贸易的影响。由于国际标准组织,国际货币基金组织和其他经济一体化联盟在洗钱方面的金融法规,汇率政策和贸易融资规则在实践中,坦桑尼亚与其他国家之间的贸易活动需要获得认可和有执照的银行。文献表明,国际贸易对经济增长的贡献已得到很好的研究,但是银行对国际贸易的影响却很少受到关注。本文使用交易成本理论,并假设银行与国际贸易具有正相关关系。主数据和辅助数据都用于数据分析。首先,向坦桑尼亚的国际贸易商（出口商和进口商）和选定的商业银行进行问卷调查。该研究通过描述性统计,物流回归和多元回归模型显示了数据结果。使用SPSS和Microsoft Excel分析数据。该文件显示,银行有向国际贸易商提供的进出口信贷计划,并对担保和信贷支持要求提供了足够的教育。同样,银行根据工会和政府政策对贸易融资法规进行功能性更改和更新。描述性统计数据表明,银行制定了灵活而全面的计划来鼓励进出口业务。此外,研究发现国际贸易与银行的贡献之间存在正相关关系（LC,DC,RM）。但是,XE和CDC并未改善整体模型,并且发现它们也无关紧要。通常,贸易商对银行的活动和对国际交易的贡献感到满意。作者建议商业银行应提高客户的意识,以提高他们对国际贸易金融产品的认识。此外,银行应聘请在跨境贸易业务和金融领域具有能力的最合格专家,以指导和处理国际贸易问题。

关键词：国际贸易贸易融资银行捐款信用证文件收集

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Prenatal and Postnatal Exposures to 1-Methyl-4-phenyl-1,2,3,6-tetra Hydropyridine (MPTP) Impaired Mouse Midbrain Dopamine System and May Produce a Predisposing and Inducing Model for Parkinson’s Disease

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Journal of Behavioral and Brain Science 2012年第4期2卷 485-494页

作者： gladson Muthian Jennifer King Lemuel Dent Marquitta Smith Veronica Mackey Clivel Charlton Department of Neuroscience and Pharmacology Meharry Medical College Nashville USA

Dopamine cell bodies in the substantia nigra of the midbrain and with their terminals projecting to the neostriatum form the nigrostriatum and these dopamine neurons degenerate in Parkinson’s disease (PD). Based on metabolic and func- tional specialization of the cell bodies versus the axon terminals, the level and disposition of dopamine, its metabolites and enzymes are different in both regions and are likely to be affected differently in PD. We examined changes in the midbrain dopamine system following 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP), to test the hypothesis that a predisposing/sensitization stage and a inducing/precipitating stage underlie PD. Pregnant mice were treated with a low dose of MPTP during gestation days 8 - 12 to model the predisposing/sensitization stage, by interrupting the fetal mid- brain dopamine system during its neurogenesis. For the inducing/precipitating stage, the 12-weeks offspring were ad- ministered MPTP. The prenatal-MPTP offspring appear normal, but midbrain dopamine, 3,4-di-hydroxy-phenyl-acetic- acid, 3-methoxytyramine, tyrosine-hydroxylase and L-aromatic-amino-acid-decarboxylase, were reduced by 49.6%, 48%, 54%, 20.9% and 25%. Postnatal-MPTP of 10, 20, 30 mg/kg administered to the prenatal-PBS vs prenatal-MPTP offspring reduced midbrain dopamine by 43.6%, 47.2%, 70.3% vs 85.4%, 89.1%, 95.2%;tyrosine-hydroxylase by 30%, 63%, 81% vs 30.7%, 70.4%, 91.4%;L-aromatic-amino-acid-decarboxylase by 0%, 2%, 40% vs 32%, 40%, 58%. The prenatal-MPTP may render the DA system sensitive by causing sub-threshold reduction of DA, its metabolites and en- zymes, enabling postnatal-MPTP to reduce dopamine above the 70% - 80% PD-inducing threshold. Thus, the study may produce a prenatal predisposing/sensitization and postnatal inducing/precipitation model of PD. It also indicates that some cases of PD may have a fetal basis, in which sub-threshold nigrostriatal impairments occur early in life and PD-symptoms are induced during aging by

关键词： Parkinson’s Disease Midbrain 1-Methyl-4-Phenyl-1 2 3 6-Tetrahydropyridine (MPTP) Dopamine Tyrosine Hydroxylase L-aromatic Amino Acid Decarboxylase Sensitization Precipitation

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