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塞拉利昂中央银行招聘选拔实践效果研究

塞拉利昂中央银行招聘选拔实践效果研究

作者： kamara Sahr Abu 北京交通大学

学位级别：硕士

本论文以塞拉利昂中央银行作为案例,研究公共部门的雇员招聘和选拔方法对组织生产率提升的效率和效果。首先,论文第一章对招聘和选拔的概念、研究背景和意义、研究的目的和内容以及研究问题进行了概述。论文第二章主要侧重于文献回顾,... 详细信息

本论文以塞拉利昂中央银行作为案例,研究公共部门的雇员招聘和选拔方法对组织生产率提升的效率和效果。首先,论文第一章对招聘和选拔的概念、研究背景和意义、研究的目的和内容以及研究问题进行了概述。论文第二章主要侧重于文献回顾,包括理论基础以及研究者的研究成果。第三章涉及数据收集的方法论,框架和方法,研究所使用的原始数据,取样方法和数据收集的取样方法,并利用数据分析的定性和定量方法,受访者类型数量以及他们如何收集。第四章主要对调查问卷的数据进行分析与展示,以表格和图示的形式进行了分析和解释。最后,第五章从研究中得出的结论,并给出了塞拉利昂中央银行如何有效照片和选拔员工的建议。

关键词：招聘选拔员工塞拉利昂中央银行

AGS能区粒子产生和椭圆流的RQMD模型模拟分析

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AGS能区粒子产生和椭圆流的RQMD模型模拟分析

作者： Issa kamara（易沙）哈尔滨工业大学

学位级别：硕士

高能重离子碰撞为产生和研究在极高温度和能量密度条件下的热密核物质的性质提供了机会,在这种条件下可能产生新的核物质相:夸克胶子等离子体(QGP)。相对论量子分子动力学模型(RQMD)是一个微观输运模型,它把含有新产生的粒子在内的所有... 详细信息

高能重离子碰撞为产生和研究在极高温度和能量密度条件下的热密核物质的性质提供了机会,在这种条件下可能产生新的核物质相:夸克胶子等离子体(QGP)。相对论量子分子动力学模型(RQMD)是一个微观输运模型,它把含有新产生的粒子在内的所有强子的经典传播(分子动力学)与量子效应,例如,随机散射,粒子衰变和入射核与靶核中核子碰撞时的泡利阻塞包含进来。重离子碰撞中产生的核物质的集体流是一种由动力学引起的空间-动量关联。在非对心重离子碰撞中,核物质的重叠区域是杏仁状的,坐标空间的非对称性是产生椭圆流的根源。在重离子碰撞中,粒子的产额和相空间的分布对于反应的动力学以及热密火球内部的状态来说是很敏感的。本文利用RQMD模型模拟了AGS能区的重离子碰撞,给出了2 AG eVAu+Au碰撞中产生的质子和π介子的横动量谱以及快度分布。质子的单粒子谱显示出了横向的集体流效应,而π介子的横动量谱受旁观者吸收等因素的影响较大。利用RQMD模型研究了2A G eVAu+Au碰撞中质子和π介子的椭圆流随横动量以及快度的分布。结果表明,质子与π介子的椭圆流受旁观者屏蔽效应的影响,及次级散射在流的形成和演化过程中是重要的。数据分析中,粒子的方位角分布是相对于估计事件平面计算的,由于事件的多重数受限,估计的事件平面与真实的事件平面存在一个偏离。本文利用RQMD模型,对2AGeV碰撞中估计反应平面的离散进行了分析,计算了反应平面离散的离散因子。

关键词：高能重离子碰撞 AGS能区 RQMD模型椭圆流方位角分布

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连接数据知识库语义查询处理

连接数据知识库语义查询处理

作者： Les Kimball kamara 东北大学

学位级别：硕士

查询处理是任何信息管理系统的重要特征和组成部分。语义Web领域的智能查询处理问题已经成为研究热点,其与已有的查询处理工作最大的不同点是：使得基本的RDF数据存储具有重要的实际应用价值。因此,设计一个高效的查询处理系统,且其性... 详细信息

查询处理是任何信息管理系统的重要特征和组成部分。语义Web领域的智能查询处理问题已经成为研究热点,其与已有的查询处理工作最大的不同点是：使得基本的RDF数据存储具有重要的实际应用价值。因此,设计一个高效的查询处理系统,且其性能不会随着数据规模的增大而退化,已经成为语义Web查询领域的一个亟待解决的问题。考虑到实时查询处理的一个潜在用途就是从异构数据源中发现新信息,因此它已经成为Linked Data领域日益流行的查询处理策略。Linked Data领域的研究者通过将实时查询处理与其它查询策略相结合,已经提出并实现了多种不同的查询技术。而本文的研究内容为：1)提出了一种查询处理模型,使用实时查询处理策略,利用Linked Data网络作为Linked Data应用的附加信息源;2)提出了一种算法(Seed Populator算法),可将相关数据源作为种子URI提供给查询处理系统。Seed Populator算法的重要贡献在于能够有效处理Umbrich所强调的非连通的、与查询相关的文档。由于已获取的查询结果中的引用链接具有不可见性,因此无法访问与查询相关的文档,这限制了查询执行引擎所反馈的查询结果的规模。而Seed Populator算法可有效解决该问题;3)进一步的,本文描述了一种可被执行系统直接用于查询Linked Data网络的通用算法,即Live Query Execution算法。在本文的建模和实验过程中,我们证明了采用该算法后,执行系统可以获取更多的相关数据资源,从而增大了命中潜在查询结果的可能性;4)最后,本文设计实现了一个Linked Data应用系统,即“研究信息发现”系统,该系统使用实时执行系统以便利用Linked Data网络作为附加的信息源。Linked Data网络的重要意义在于,它可以提供一个全局的分布式交互数据库,该数据库中的有效数据来源于生活中的各个方面。而在实际应用领域,通过高效的查询处理系统来发现和利用相关有效数据,是一个潜在的需求。本文着重解决了Linked Data应用如何利用从Linked Data网络中获取的如此巨大的信息。

关键词： Linked Data 查询处理语义Web 基于遍历的连接查询处理信息发现实时查询执行链接遍历

Seasonal Changes in Vegetation and Land Use in Lassa-Fever-Prone Areas (Kenema and Kailahun Districts) in Eastern Sierra Leone

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Natural Resources 2015年第7期6卷 450-456页

作者： Alie kamara Bashiru Mohamed Koroma Alhaji Brima Gogra Department of Soil Science School of Agriculture Njala Campus Njala University Njala Sierra Leone School of Community Health Sciences Bo Campus Njala University Bo Sierra Leone Department of Chemistry School of Environmental Sciences Njala Campus Njala University Njala Sierra Leone

Lassa Fever is endemic to the eastern region of Sierra Leone. It is a haemorrhagic disease that is often transmitted from rats to humans and then human to humans. Ecological disturbances such as changes in land use involving conversion of natural ecosystems to agriculture, mining or for urban expansion are reported to bring humans into close contact with animals such as the Mastomys rat that carries the Lassa Fever virus thereby posing health *** nature and extent of such ecological disturbances or land use changes within areas known to be endemic to Lassa Fever are not clearly understood from a research context in Sierra Leone. This study was therefore undertaken to identify the pattern of changes in land use and cropping practices and their potential to bring humans into close interactions with the Mastomys rat that is the host for the Lassa Fever virus. Four communities were chosen for the study, two rural (Lalehun and Majihun) and two urban (Lambayama section in Kenema City and Largo Square section in Segbwema Town). Different vegetation and land use/cropping practices were identified and observations were made on the pattern of changes at different times in the cropping year. There were four common vegetation and cropping practices found in all communities: upland rice intercropping, old fallow, young fallow, and swamp rice cultivation. The study revealed the variations in land use patterns and cropping practices between urban and rural settlements. Agro-forestry practices such as perennial cash crops cacao and rubber plantations were more common in rural communities. The study also revealed that while fallow vegetation persisted in rural areas there had been expansion of settlements into old fallow vegetation indicating a greater threat to the persistence of natural ecosystem in urban than in rural settlements. These disturbances resulted in habitat fragmentation and increased the likelihood of contact between humans and animal species (e.g. Mastomys

关键词： Lassa Fever Vegetation and Land Use Changes Cropping Patterns Eastern Sierra Leone

塞拉利昂原木出口贸易政策对环境和经济的影响研究

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塞拉利昂原木出口贸易政策对环境和经济的影响研究

作者： Mohamed John kamara 东北林业大学

学位级别：硕士

热带森林保护是近年来许多学者争论的热点问题,这主要是由于它们在固碳、向大气释放氧气和作为生物多样性的家园方面发挥了重要作用。塞拉利昂过去为了保护其森林,实施了木材进出口禁令,然而这种政策的有效性以及它对国家经济和环境的... 详细信息

热带森林保护是近年来许多学者争论的热点问题,这主要是由于它们在固碳、向大气释放氧气和作为生物多样性的家园方面发挥了重要作用。塞拉利昂过去为了保护其森林,实施了木材进出口禁令,然而这种政策的有效性以及它对国家经济和环境的影响没有被检验过。此外,随着全球推动采用可持续森林管理以及环境组织要求政策改革的压力越来越大,需要重新审视塞拉利昂政府的政策,以审查LEB政策是否能够实现森林保护和经济发展的多重目标。在本文中,通过用全球森林产品模型（GFPM）来模拟和确定LEB政策对塞拉利昂森林部门和经济的影响。该模型利用联合国粮食及农业组织的数据来预测森林部门对贸易政策变化的反应。为了确定该策略的影响,并实验哪种策略方案最适合塞拉利昂,论文使用GFPM软件来运行和试验四种不同的策略方案。在第一种情况下,完全禁止出口塞拉利昂工业用圆木和锯木。在第二,第三和第四种情况下,对所有工业原木和锯木的出口分别征收10%,20%和30%的关税。研究结果表明,禁止原木出口政策不能实现森林保护和经济增长的双重目标。但是它可以为塞拉利昂实现森林保护。10%关税的结果表明,低或中关税比高关税更适合于实现保护和经济发展的目标。提高关税的结果表明,高关税有利于塞拉利昂的森林保护,但会导致工业圆木和锯材的出口大幅减少,因此对经济不利。

关键词：塞拉利昂原木出口禁令森林保护全球林产品模型(GEPM)

Scattering of the Radial Focusing Mass-Supercritical and Energy-Subcritical Nonlinear Schrödinger Equation in 3D

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Advances in Pure Mathematics 2013年第1期3卷 164-171页

作者： Mujahid Abd Elmjed M-Ali Amadu Fullah kamara Department of Mathematics Faculty of Education Kassala University Kassala Sudan Department of Mathematics Faculty of Pure and Applied Sciences Fourah Bay College University of Sierra Leone Freetown Sierra Leone

This paper studies the global behavior to 3D focusing nonlinear Schrodinger equation (NLS), the scaling index here is (0nd energy-subcritical, and we prove under some condition... 详细信息

This paper studies the global behavior to 3D focusing nonlinear Schrodinger equation (NLS), the scaling index here is (0nd energy-subcritical, and we prove under some condition the solution u(t) is globally well-posed and scattered. We also show that the solution “blows-up in finite time” if the solution is not globally defined, as t→T we can provide a depiction of the behavior of the solution, where T is the “blow-up time”.

关键词： NLS Blows-Up in Finite Time Supremum Precompactness

Youth Entrepreneureship: an Alternative Strategy to Poverty Alleviation in the Mano River Union (MRU) Sierra Leone as a Case Study

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Youth Entrepreneureship: an Alternative Strategy to Poverty ...

作者： Nicholas Alhaji kamara 华中师范大学

学位级别：硕士

The overall objective of this research is to advance an understanding of how youth entrepreneurship can be an alternative strategy to poverty alleviation in the Mano River Union, using Sierra Leone as a case studyThe study attempted to examine whether there is a positive correlation between youth entrepreneurship development and poverty alleviation in sierra lone. In executing this study Sierra Leone is use as a case study analysis. The questionnaire was administered to 150 SMEs owners who included youth entrepreneurs who come to China to do business in Guangzhou,100 questionnaires were administered in Freetown and 50 were administered online to Sierra Leonean youth's entrepreneurs and workers living in Liberia, Ghana and Guinea. One on one interview was conducted with staff of National Youths Commission, the Executive Director Call to Business Micro-Finance and Presenter Life by Design SL and Head of Privatization Commission in Sierra *** quantitative data was analysis using SPSS and the qualitative data was analysed using interpretation. Also both theoretical and empirical literature were reviewHowever, the research findings and results reveal that there is a strong positive relationship between youth entrepreneurship and poverty alleviation, which means youth entrepreneurship, could be use as strategy for poverty reduction in Sierra Leone and other MRU countries. A model on effective youth entrepreneurship development was *** limitations of this study are that much of the literatures used on the analysis were captured on youth entrepreneurship programs, government policies and World Bank reports from developed and developing countries. There are scarcity of secondary data on youth entrepreneurship and its composition in Sierra Leone.

关键词： Youth Entrepreneurship Poverty Alleviation Sustainable Development Youth unemployment Sierra Leone and the Mano River Union

Modeling and Forecasting of SARS CoV-2 Cases in Sierra Leone

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Journal of Biosciences and Medicines 2022年第4期10卷 77-86页

作者： Sallieu Kabay Samura Theresa Ruba Koroma Abdul A. kamara Department of Mathematics and Statistics Fourah Bay College University of Sierra Leone Freetown Sierra Leone Department of Internal Medicine Faculty of Clinical Sciences College of Medicine and Allied Health Sciences University of Sierra Leone Freetown Sierra Leone

Severe acute respiratory syndrome coronavirus-2 (SARS CoV-2) has been a global threat spreading in Sierra Leone, and many studies are being conducted using various Statistical models to predict the probable evolution of this pandemic. In this paper, we use the autoregressive integrated moving average (ARIMA) model with the aim of forecasting the cumulative confirmed cases of SARS CoV-2 in Sierra Leone. The Akaike Information Criterion (AIC) was applied to the training data as a criterion method to select the best model. In addition, the statistical measure RMSE and MAPE were utilized for testing this data, and the model with the minimum RMSE and MAPE was selected for future forecasting. ARIMA (3, 2, 1) was confirmed to be the optimal model based on the lowest AIC value. This model was then applied to study the trend of SARS CoV-2 from 1st February 2022 to 30th February 2022. The result shows that incidence of SARS CoV-2 from 1st February 2022 to 30th February 2022, increasing growth steep in Sierra Leone (7718.629, 95% confidence limit of 6785.985 - 8651.274).

关键词： ARIMA Model SARS Cov-2 Stationarity Forecast

Quantification of Annual Urban Growth of Dar es Salaam Tanzania from Landsat Time Series Data

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Advances in Remote Sensing 2017年第3期6卷 175-191页

作者： kamara Emanuel Gombe Ichio Asanuma Jong-Geol Park Graduate School of Informatics Tokyo University of Information Sciences Chiba Japan

The information on urban land cover distribution and its dynamics is useful for understanding urbanization and its impacts on the hydrological cycle, water management, surface energy balances, urban heat island, and biodiversity. This study utilizes machine learning, texture variables and spectral bands to quantify the urban growth annually. We used multi-temporal Landsat satellite image sets from 2007 to 2016 and Random Forest classification to map urban land-use in Dar es Salaam. We also applied Annual classification approach to detect the spatiotemporal patterns of urban areas. This approach improved classification accuracy and aided in understanding the urban land-use system dynamics operating in our study area. The results pointed out that, the total built-up areas have grown from 318 km2, 388.6 km2 and 634.7 km2 in 2007, 2012 and 2016 respectively. The built up areas growth rate is almost 8%, which makes Dar es Salaam be among the fastest growing cities in Africa. The results indicate that, combining spectral bands, texture variables (ndVI BCI, MndWI) and annual classification map approach was sufficient to map the urban areas. The approach applied in this research provides a useful guide to the urban growth studies and may also serve as a tool for land management planners.

关键词： Random Forest Annual Classification Map Texture Analysis Dar es Salaam