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A Game-theoretic approach to analyze interacting actors in GRL goal models GRL目标模型中交互参与者分析的博弈论方法
IF 2.8 3区 计算机科学 Q3 COMPUTER SCIENCE, INFORMATION SYSTEMS Pub Date : 2021-04-09 DOI: 10.1007/s00766-021-00349-1
J. Hassine, Dhaker Kroumi, Daniel Amyot
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引用次数: 1
A GIS based approach to determine the changes of water hyacinth (Eichhornia crassipes) cover and it’s relation with Lesser Whistling Teal (Dendrocygna javanica) assemblage at Santragachi Wetland, West Bengal 基于GIS的西孟加拉邦Santragachi湿地水葫芦(Eichhornia crassipes)盖度变化及其与小飞禽(Dendrocygna javanica)组合关系研究
IF 2.8 3区 计算机科学 Q3 COMPUTER SCIENCE, INFORMATION SYSTEMS Pub Date : 2021-04-07 DOI: 10.30564/RE.V3I1.2905
M. Begam, Sudin Pal, Niranjita Mitra, A. Chatterjee, A. Mukhopadhyay, S. Mukhopadhyay
1.Directorate of Forest, Working Plan & GIS Circle, Aranya Bhavan, Salt Lake, Kolkata700098, India 2.Ecotoxicology and Environmental Technology Project Laboratory, Government College of Engineering and Leather Technology, Salt Lake, Kolkata-700098, India 3.Office of The Divisional Forest Officer, North 24 Parganas Division, Barasat -700124, India 4.Office of The Divisional Manager, Purulia Forest Development Corporation Limited, Purulia723101, India 5.Manitoba University, Winnipeg, ManitobaR3T 2N2, Canada
1.1 .森林局,工作计划和GIS圈,Aranya Bhavan,盐湖,印度加尔各答7000982 .印度政府工程与皮革技术学院生态毒理学与环境技术项目实验室,印度加尔各答700098;3 .印度巴拉萨特-700124,北24帕尔加纳斯分区森林官员办公室。4 .普鲁里亚森林发展有限公司区域经理办公室,印度普鲁里亚723101马尼托巴大学,温尼伯,马尼托巴ar3t2n2,加拿大
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引用次数: 2
Soil seed banks in two environments of forest restoration post bauxite mining: native tree plantation and natural regeneration 铝土矿开采后森林恢复两种环境的土壤种子库:原生人工林和自然更新
IF 2.8 3区 计算机科学 Q3 COMPUTER SCIENCE, INFORMATION SYSTEMS Pub Date : 2021-04-07 DOI: 10.30564/RE.V3I1.2631
S. V. Martins, W. Fonseca, Luiz Henrique Elias Cosimo, Diego Balestrin
Article history Received: 30 November 2020 Accepted: 31 December 2020 Published Online: 30 March 2021 The objective of this study was to compare the soil seed bank in an area under natural regeneration (F1) and another reforested through seedling planting (F2), seven years after bauxite mining, in Southeast, Brazil. In each area, 10 sampling points were randomly distributed, using three samples of topsoil to represent each point. The samples were transported to a shade house and evaluated for six months, where emerging individuals were identified every two weeks. Floristic similarity was evaluated with cluster analysis based on the Jaccard index (SJ). Species richness and abundance of individuals were compared using Student's t test. In F1, 2,114.94 propagules m-2 were registered, belonging to 51 species and 24 botanical families, Shannon-Wiener diversity index H’=2.770 and Pielou evenness index J’=0.705. In F2, 1,168.62 propagules m-2 were registered, belonging to 42 species and 22 families, H’=2.618 and J’=0.700. The (SJ) between F1 and F2 was 0.61, indicating a high similarity. The results showed high density of propagules, good diversity and absence of ecological dominance. The high number of individuals and diversity of tree species with zoochoric dispersion found in the areas indicates that both natural regeneration and reforestation were efficient in the ecological restoration of bauxite mined areas.
文章历史接收时间:2020年11月30日接受时间:2020月31日在线发表时间:2021年3月30日本研究的目的是比较巴西东南部铝土矿开采七年后,一个自然再生地区(F1)和另一个通过幼苗种植重新造林地区(F2)的土壤种子库。在每个区域,随机分布10个采样点,使用三个表层土样本代表每个采样点。样本被运到一个阴凉处,评估六个月,每两周识别一次新出现的个体。以Jaccard指数(SJ)为基础,采用聚类分析方法对植物区系相似性进行评价。物种丰富度和个体丰富度采用Student t检验进行比较。F1共登记繁殖体m-2 2114.94个,隶属于24个植物科51种,Shannon Wiener多样性指数H'=2.770,Pielou均匀度指数J'=0.705。F2代共登记繁殖体m-2 1168.62个,隶属于22科42种,H'=2.618,J'=0.700。F1和F2之间的(SJ)为0.61,表明高度相似。结果表明,繁殖体密度高,多样性好,不存在生态优势。在该地区发现的具有动物群落分散性的大量个体和树种多样性表明,自然再生和重新造林在铝土矿矿区的生态恢复方面是有效的。
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引用次数: 1
Evaluating the potential contribution of non-timber forest products (NTFPs) to smallholder farmers in semi-arid and arid regions: A case of Chivi, Zimbabwe 评估半干旱和干旱地区非木材林产品对小农的潜在贡献:以津巴布韦奇维为例
IF 2.8 3区 计算机科学 Q3 COMPUTER SCIENCE, INFORMATION SYSTEMS Pub Date : 2021-04-07 DOI: 10.30564/RE.V3I1.2874
Peter Kupurai, A. Kugedera, N. Sakadzo
Article history Received: 1 February 2021 Accepted: 19 March 2021 Published Online: 30 March 2021 Food insecurity in most dry regions in Zimbabwe has taught many people a lesson of using non timber forest products (NTFPs) to reduce food insecurity and improve livelihoods as well as poverty alleviation. The aim of the study was to evaluate the potential contribution of non-timber forest products to smallholder farmers in arid and semi-arid regions. The research was carried out as a survey and data was collected using interviews, questionnaires and focus group discussion. Data was analysed for descriptive statistics using IBM SPSS version 25. Results indicated that 64 % were females and 36 % were males with the majority of participants being married (57.6 %) with only 8.8 % being widowed. Results show that all respondents (100%) indicated that they obtain fruits from the forests as a major source of food during winter and rain season. Vegetables (84.2 %), thatching grass (80.8%) and edible worms (62.5 %) were also major non-timber forest products obtained from the forests by participants. All participants (100%) indicated that income generation, firewood and source of heat for brick moulding were major benefits they obtain from forest with vegetables (74.2 %), brooms (91.7 %) and improved nutrition (85.0 %) being regarded as other important benefits enjoyed by local people from forests. Afforestation and reforestation were regarded as major sustainable forest management practices by all (100%) participants with agroforestry being indicated by only 12.5 % since people had no knowledge about it. NTFPs has capacity of improving food security, human livelihoods and alleviate poverty. People are encouraged to harvest NTFPs sustainably to allow future use. Use of agroforestry can be a best way for managing forests sustainably, improve food security, crop yield, poverty alleviation and climate change mitigation.
文章历史接收时间:2021年2月1日接收时间:2021年3月19日在线发布时间:2021年3月30日津巴布韦大部分干旱地区的粮食不安全给许多人上了一课,即使用非木材林产品(NTFPs)来减少粮食不安全、改善生计和减轻贫困。这项研究的目的是评价非木材林产品对干旱和半干旱地区小农的潜在贡献。本研究以调查的方式进行,数据收集采用访谈、问卷调查和焦点小组讨论。数据采用IBM SPSS version 25进行描述性统计分析。结果显示,64%是女性,36%是男性,大多数参与者已婚(57.6%),只有8.8%是寡妇。结果表明,所有答复者(100%)表示,他们在冬季和雨季从森林中获取水果作为主要食物来源。蔬菜(84.2%)、茅草(80.8%)和食用蠕虫(62.5%)也是参与者从森林中获取的主要非木材林产品。所有参与者(100%)都表示,他们从森林中获得的主要好处是创收、木柴和制砖的热源。当地人从森林中获得的其他重要好处包括蔬菜(74.2%)、扫帚(91.7%)和改善营养(85.0%)。所有参与者(100%)都认为造林和再造林是主要的可持续森林管理做法,只有12.5%的人表示农林业,因为人们对它一无所知。国家非森林保护区具有改善粮食安全、人类生计和减轻贫困的能力。鼓励人们以可持续的方式收获非森林保护区,以便将来利用。使用农林业可以是可持续管理森林、提高粮食安全、作物产量、减轻贫困和减缓气候变化的最佳方式。
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引用次数: 1
Uma análise da multidimensionalidade das percepções de justiça em um tipo ideal de economia solidária e nos empreendimentos econômicos solidários do Paraná 一种理想的团结经济和parana团结经济企业中正义感知的多维度分析
IF 2.8 3区 计算机科学 Q3 COMPUTER SCIENCE, INFORMATION SYSTEMS Pub Date : 2021-04-05 DOI: 10.5380/RE.V42I77.68471
Oz Solon Chovghi Iazdi
O artigo parte de uma crítica à concepção unidimensional de justiça utilizada pela economia neoclássica para propor a necessidade de se adotar uma abordagem multidimensional desse conceito, incluindo noções distributivas, procedimentais e interacionais. Mostra-se que, em teoria, um tipo ideal de Economia Solidária provê maiores incentivos do que um tipo ideal de Economia Capitalista para a amplificação do senso de igualdade, democracia e solidariedade percebido pelos trabalhadores. Contudo, através da observação de relatos em empreendimentos econômicos solidários do Paraná, evidencia-se que há, ainda, um compartilhamento de valores institucionais que se distanciam do que se espera de uma Economia Solidária ideal.
本文从批判新古典经济学所使用的一维正义概念开始,提出需要对这一概念采取多维方法,包括分配、程序和互动概念。从理论上讲,理想的团结经济比理想的资本主义经济更能激发工人的平等、民主和团结意识。然而,通过观察parana中关于团结经济企业的报告,很明显,仍然有一种共同的制度价值观,与人们对理想团结经济的期望相距甚远。
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引用次数: 0
Evidências empíricas das relações entre expectativas dos agentes econômicos e desemprego no Brasil 巴西经济主体的预期与失业之间关系的经验证据
IF 2.8 3区 计算机科学 Q3 COMPUTER SCIENCE, INFORMATION SYSTEMS Pub Date : 2021-04-05 DOI: 10.5380/RE.V42I77.68449
Fabiano Roberto Santos de Lima, Rodolfo Nicolay
A decisão de investimento por parte dos agentes econômicos passa pela confiança e expectativas de um ambiente de negócios mais propício. Esse otimismo pode funcionar como um mecanismo que impulsiona a criação de vagas no mercado de trabalho. Neste contexto, este artigo analisa a existência de relações de curto e longo prazos entre o desemprego e expectativas e confiança de empresários da indústria e comércio. A análise econométrica empregada foi a de estimação pelos métodos ARDL, OLS e GMM. Os resultados revelam que expectativas mais otimistas dos empresários, no longo prazo, se traduzem em queda dos níveis de desemprego com impactos de redução de 0,28% a 0,30% para cada 1 ponto de melhora nas expectativas. Para o curto prazo, não foram encontradas evidências estatisticamente significativas que o mesmo ocorra.
经济主体的投资决策取决于对更有利的商业环境的信心和期望。这种乐观情绪可以作为一种机制,推动劳动力市场空缺的创造。在此背景下,本文分析了失业与工商企业家的期望和信心之间存在的短期和长期关系。计量分析采用ARDL、OLS和GMM方法进行估计。结果显示,从长远来看,企业家更乐观的预期会导致失业率水平的下降,预期每提高1个百分点,失业率就会下降0.28%至0.30%。在短期内,没有发现统计学上显著的证据表明这种情况正在发生。
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引用次数: 0
Matriz de contabilidade social, resultado primário e pagamento de juros por setor institucional no Brasil 巴西各机构部门的社会会计矩阵、主要结果和利息支付
IF 2.8 3区 计算机科学 Q3 COMPUTER SCIENCE, INFORMATION SYSTEMS Pub Date : 2021-04-05 DOI: 10.5380/RE.V42I77.75981
Lucas Ferraz Vasconcelos, Nelson Barbosa Filho
Este trabalho apresenta a distribuição da renda, do gasto e do financiamento dos principais agentes da economia brasileira, bem como o padrão de aquisição de seus ativos financeiros, a partir da construção de uma Matriz de Contabilidade Social (SAM) Vertical para o Brasil, conforme proposto por Barbosa-Filho (2018). Essa matriz permite a exploração de diversas linhas analíticas envolvendo as principais variáveis econômicas de fluxo e estoque, mostrando-se um instrumento de ensino e pesquisa em economia simples e intuitivo. Descrevemos a estrutura da SAM vertical brasileira para o ano de 2016 e analisamos o padrão de pagamento de juros entre os agentes econômicos e o comportamento do resultado primário dos setores institucionais ao longo do período 2000-16. Mostramos que a economia brasileira vem passando por um processo de profunda mudança estrutural de seu padrão de financiamento desde 2012, que foi intensificado pela recessão de 2015-16
本文从Barbosa Filho(2018)提出的巴西垂直社会会计矩阵(SAM)的构建中,介绍了巴西经济主要主体的收入、支出和融资分配,以及金融资产的获取模式。该矩阵允许探索涉及流量和存量的主要经济变量的几个分析线,被证明是简单直观的经济学中的教学和研究工具。我们描述了2016年巴西垂直SAM的结构,并分析了2000-16年期间经济主体之间的利息支付模式和机构部门主要结果的行为。我们表明,自2012年以来,巴西经济一直在经历融资模式的深刻结构性变化,2015-16年的衰退加剧了这一变化
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引用次数: 0
Um survey sobre as fricções financeiras em modelos DSGE DSGE模型中财务摩擦的调查
IF 2.8 3区 计算机科学 Q3 COMPUTER SCIENCE, INFORMATION SYSTEMS Pub Date : 2021-04-05 DOI: 10.5380/RE.V42I77.69086
Suelen Aparecida Wendler
The objective of this work is to conduct a survey of financial friction modeling in stochastic dynamic general equilibrium (DSGE) models. For, given the global financial crisis of 2008, the researchers realized that the models proposed until that moment were not able to present an adequate answer to the origins and evolution of that crisis, and the reason would be in the fact that this modeling does not include interaction of the financial market with the rest of the economy. So in the last decade much academic effort has been used to analyze the conduct of central bank monetary policies in an environment with financial frictions and the role of macroprudential measures. In this way, it can be concluded that financial frictions explain a large part of the changes in the product against other macroeconomic variables, causing changes in the financial conditions resulting from the increase or decrease in credit spreads to influence the equilibrium relation between the basic interest rate and aggregate demand, as well as the relationship between economic activity and inflation. Key-Words: Macroeconomics; DSGE models; Financial frictions. ÁREA: 6Macroeconomia e Finanças
本文的目的是对随机动态一般均衡(DSGE)模型中的金融摩擦建模进行综述。因为,考虑到2008年的全球金融危机,研究人员意识到,在此之前提出的模型无法为这场危机的起源和演变提供充分的答案,原因可能是这个模型没有包括金融市场与经济其他部分的相互作用。因此,在过去十年中,许多学术努力被用于分析央行在金融摩擦环境下的货币政策行为以及宏观审慎措施的作用。由此可以得出结论,金融摩擦在很大程度上解释了产品相对于其他宏观经济变量的变化,导致信贷息差的增加或减少导致金融状况的变化,从而影响基本利率与总需求之间的均衡关系,以及经济活动与通货膨胀之间的关系。同时提供:宏观经济学;“动态随机一般均衡”模型;金融摩擦。ÁREA: 6宏观经济与金融
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引用次数: 0
A epistemologia de Imre Lakatos e sua (in)aplicabilidade à teoria econômica 拉卡托斯的认识论及其对经济理论的适用性
IF 2.8 3区 计算机科学 Q3 COMPUTER SCIENCE, INFORMATION SYSTEMS Pub Date : 2021-04-05 DOI: 10.5380/RE.V42I77.67434
Tailiny Ventura, Lucas Casonato
Este trabalho objetiva apresentar a metodologia dos programas de pesquisa de Lakatos (MPPC) e aplicações dele a algumas teorias econômicas. Investiga-se como essas utilizações consideraram a possibilidade de adequação destas distintas teorias na estruturação lakatosiana. Em seguida são analisadas algumas críticas existentes a esse procedimento, que consideram impraticável a MPPC para a ciência econômica. Dessa divergência conclui-se que a dificuldade inerente da aplicação de Lakatos à teoria econômica deriva do caráter subjetivo desta última enquanto ciência social, que permite a coexistência de diversas visões teóricas para o mesmo fenômeno econômico.
本工作旨在介绍拉卡托斯研究计划的方法论及其在一些经济理论中的应用。研究了这些使用是如何考虑拉卡托西结构中这些不同理论的充分性的可能性的。然后分析了现有的一些对该程序的批评,认为MPPC在经济科学中不切实际。从这种分歧中可以得出结论,将拉卡托斯应用于经济理论的内在困难源于后者作为一门社会科学的主观特征,这允许对同一经济现象的几种理论观点共存。
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引用次数: 1
Os determinantes da inflação na República democrática do Congo: um estudo econométrico (2005-2015) 刚果民主共和国通货膨胀的决定因素:一项计量经济学研究(2005-2015)
IF 2.8 3区 计算机科学 Q3 COMPUTER SCIENCE, INFORMATION SYSTEMS Pub Date : 2021-04-05 DOI: 10.5380/RE.V42I77.69673
Christian Ndege Kobunda, Edson Zambon Monte, R. Moreira
Em muitos países emergentes e subdesenvolvidos, os choques de oferta provaram ser os maiores causadores da inflação a partir dos anos 2000 (DE GREGORIO, 2012). As mudanças de preços das commodities e da taxa de câmbio nominal mostraram-se relevantes para o entendimento da dinâmica inflacionária destes países. Assim, este trabalho teve por objetivo analisar os determinantes da inflação na República Democrática do Congo, entre janeiro de 2005 e dezembro de 2015, utilizando o modelo dos vetores autorregressivo (VAR), por meio das funções de resposta ao impulso (FRis) e da decomposição da variância do erro de previsão (DV). Os resultados mostraram que o pass-through do câmbio foi a variável com maiores impactos, positivos e significativos, sobre a inflação, e que a taxa de juros revelou-se um instrumento insignificante estatisticamente para combater a inflação no país.
在许多新兴和不发达国家,供应冲击已被证明是21世纪初以来通胀的主要原因(de GREGORIO, 2012)。事实证明,商品价格和名义汇率的变化与理解这些国家的通货膨胀动态有关。这工作有目的分析通货膨胀的决定因素在刚果民主共和国,2005年1月至2015年12月之间,使用向量autorregressivo (VAR)模型,通过脉冲响应函数(FRis)和预测误差方差分解(DV)。结果表明,汇率传递是对通货膨胀影响最大的变量,无论是积极的还是显著的,而利率在统计上是一个微不足道的工具,以对抗该国的通货膨胀。
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引用次数: 0
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Requirements Engineering
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