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Artificial neural networks and non-linear regression for quantifying the wood volume in Eucalyptus species
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Tays Silva Batista --- , Brazil Larissa Pereira Ribeiro Teodoro --- , Brazil Gileno Brito de Azevedo --- , Brazil Glauce Taís de Oliveira Sousa Azevedo --- , Brazil Nerison Luis Poersch --- , Brazil Marcus Vinicius Vieira Borges --- , Brazil Paulo Eduardo Teodoro --- , BrazilWood volume is the variable that best represents the yield of planted forests, and several regression models are used in its estimation. Artificial neural networks (ANNs) are recognised for their accuracy and generalisation capacity associated with the quality and quantity... -
Towards the development of an environmental rule-based model for predicting recruitment in Brazilian sardine Sardinella brasiliensis
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: S Jablonski LFL LegeyA rule-based model was built in order to analyse the effects of environmental variables (wind stress, Ekman transport, turbulence, and sea surface temperature [SST]) on the recruitment of the Brazilian sardine Sardinella brasiliensis. The purpose of modelling was (1) to... -
Low light availability affects leaf gas exchange, growth and survival of Euterpe edulis seedlings transplanted into the understory of an anthropic tropical rainforest
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: MLS dos Santos --- Departamento de Ciências Agrárias e Ambientais, Brazil S França --- Departamento de Ciências Agrárias e Ambientais, Brazil FP Gomes --- Departamento de Ciências Biológicas, Brazil JL do Nascimento --- Departamento de Ciências Agrárias e Ambientais, Brazil L dos Anjos Silva --- Departamento de Ciências Biológicas, Brazil MS Mielke --- Departamento de Ciências Biológicas, BrazilEuterpe edulis Mart. (Arecaceae) is a threatened palm tree of the Brazilian Atlantic Rainforest understory with fundamental importance for the restoration of degraded forest environments. We assessed the leaf gas exchange, growth and survival of E. edulis seedlings transplanted at... -
Acacia mearnsii industry overview: current status, key research and development issues
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Julian Moreno Chan --- Institute for Commercial Forestry Research, South Africa Philip Day --- NTE Company (Pty) Ltd, South Africa John Feely --- Forestry consultant, South Africa Rob Thompson --- NCT Forestry Co-operative Ltd, South Africa Keith M Little --- School of Natural Resource Management, South Africa Craig H Norris --- NCT Forestry Co-operative Ltd, South AfricaAcacia mearnsii De Wild (black wattle) is an important plantation species for tannin production and woodchip exports in South Africa and Brazil. This study provides an updated overview of the black wattle industries in both countries, including planted areas and... -
“Ba pi ai?”—Rethinking the relationship between secularism and professionalism in anthropological fieldwork
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Lesley J F Green --- Department of Social Anthropology, South AfricaEpistemological commitments shape notions of what constitutes an ethical presence in the field. The article examines the assumption of secularism, linked to objectivity, implicit in codes of ethics. It argues that in fieldwork, the secular position neither guarantees ethical behaviour... -
Inferring population trends of Araucaria angustifolia (Araucariaceae) using a transition matrix model in an old-growth forest
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Giovani F Paludo --- Grupo Uso e Conservação dos Recursos Florestais, Brazil Miguel B Lauterjung --- Grupo Uso e Conservação dos Recursos Florestais, Brazil Maurício S dos Reis --- Núcleo de Pesquisas em Florestas Tropicais, Brazil Adelar Mantovani --- Grupo Uso e Conservação dos Recursos Florestais, BrazilMatrix population models may generate important information to prevent undesirable outcomes for endangered species. This is the case for Araucaria angustifolia, a Critically Endangered conifer, with little knowledge regarding its life history and trends in development over time. This study... -
Biomass production and potential water stress increase with planting density in four highly productive clonal Eucalyptus genotypes
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Rodrigo Hakamada --- Forest Resources Graduate Program, ‘Luiz de Queiroz’ College of Agriculture, Brazil Robert M Hubbard --- US Department of Agriculture Forest Service, USA Silvio Ferraz --- Forest Sciences Department, ‘Luiz de Queiroz’ College of Agriculture, Brazil José Luiz Stape --- Department of Forestry and Environmental Resources, USA Cristiane Lemos --- International Paper do Brasil, BrazilThe choice of planting density and tree genotype are basic decisions when establishing a forest stand. Understanding the interaction between planting density and genotype, and their relationship with biomass production and potential water stress, is crucial as forest managers are... -
Technological appropriability and export performance of Brazilian firms
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Graziela Ferrero Zucoloto --- Institute of Applied Economic Research, Brazil Julio Raffo --- Division Sectorial Studies, World Intellectual Property Organization, Economics and Statistics Division, Switzerland Sergio Leão --- Phd in Economics at Pontificia Universidade Catolica (PUC), BrazilThis paper aims to evaluate the strategies of Brazilian manufacturing firms in their use of intellectual property (IP) and its impact on their export performance. Although the correlation between exports and innovative activities is already consolidated in the existing literature,... -
Science, technology and innovation in BRICS countries: Introduction to the special issue
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Swapan Kumar Patra --- Business School, South Africa Mammo Muchie --- 2DST/NRF SARChI Professor, South AfricaThe BRICS (Brazil, Russia, India, China and South Africa) economies have been the subject of many scholarly studies in recent years, as well as featuring in the popular media. This special issue of the African Journal of Science, Technology, Innovation... -
Effect of tree spacing on growth and wood density of 38-year-old Cariniana legalis trees in Brazil
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Ivanka Rosada de Oliveira --- Departamento de Ciências Florestais, Brazil Matheus Peres Chagas --- Setor de Engenharia Florestal, Brazil Jean-Pierre Bouillet --- Departamento de Ciências Florestais, Brazil Eduardo Luiz Longui --- Divisão de Dasonomia, Brazil Israel Luiz de Lima --- Divisão de Dasonomia, Brazil Bruno Bordron --- Departamento de Ciências Florestais, Brazil Angel Boschiero Ferreira --- Departamento de Ciências Florestais, Brazil Mario Tommasiello Filho --- Departamento de Ciências Florestais, BrazilAverage wood density of 38-year-old Cariniana legalis (Mart.) Kuntze, a Brazilian native forest species, was found to increase with faster growth and lower stocking, while decreasing from pith to bark. A complete randomised block design was planted with five blocks... -
Anatomical, physiological and allometric contrasts of the Cerrado tree Dalbergia miscolobium in full sun and shade environments
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Ane Marcela das Chagas Mendonça --- , Brazil Jean Marcel Sousa Lira --- , Brazil Marcelo Rodrigues --- , Brazil Vanessa da Fontoura Custódio Monteiro --- , Brazil Edson Simão --- , Brazil João Paulo Rodrigues Alves Delfino Barbosa --- , BrazilThe Brazilian Cerrado is a mosaic comprised of different vegetation formations and consequently, different environmental conditions. Tree density modifies the availability of light and affects species distribution. Thus, seedlings of species with a broad distribution should show contrasting anatomical, morphological,... -
Predictions of chlorophyll concentrations in the leaves of seedlings of two congeneric tropical trees from RGB digital image components
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Marcelo Schramm Mielke --- , Brazil Luciana Santos Lobo --- , Brazil Geane Santos da Costa --- , Brazil Ana Cristina Schilling --- , Brazil Martielly Santana dos Santos --- , Brazil Ândrea Carla Dalmolin --- , BrazilThe segmentation of digital images in red, green and blue (RGB) components is a low-cost method for monitoring leaf chlorophyll concentrations and seedling quality. The two congeneric species, Cariniana legalis and C. estrellensis, are distinguished based on differences in bark... -
Earnings informativeness in the Brazilian market: the influence of dividends and financial constraints
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Rodrigo Simonassi Scalzer --- , Brazil Ana Carolina Santos Souza --- , BrazilThis study addresses the informativeness of accounting earnings in Brazil by analysing the impact of distributed dividends and the existence of financial constraints. Panel data regression with fixed effects and quantile regression estimated that the dividend informativeness in Brazil and... -
Machine learning techniques to estimate mechanised forest cutting productivity
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Saulo Boldrini Gonçalves --- , Brazil Nilton Cesar Fiedler --- , Brazil Jeferson Pereira Martins Silva --- , Brazil Gilson Fernandes da Silva --- , Brazil Mayra Luiza Marques da Silva --- , Brazil Luciano José Minette --- , Brazil Daniel Pena Pereira --- , Brazil Domingos Manuel Mendes Lopes --- , Portugal Evandro Ferreira da Silva --- , Brazil Antônio Henrique Cordeiro Ramalho --- , Brazil Jeangelis Silva Santos --- , Brazil Marcelo Otone Aguiar --- , Brazil Jose de Oliveira Melo Neto --- , Brazil Renisson Neponuceno de Araújo Filho --- , BrazilThe productivity of wood harvesting operations is one of the main viability indicators of the forestry enterprise, which is directly influenced by land, population, and operational planning characteristics. The variables that affect the productivity of harvesting machines are particularly difficult... -
Nitrogen mineralisation and N2O emissions in pure and mixed-species plantations of Eucalyptus urograndis and Acacia mangium
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Felipe Martini Santos --- , Brazil Fabiano de Carvalho Balieiro --- , Brazil Danilo Henrique dos Santos Ataíde --- , Brazil Pedro Vaz da Rocha --- , Brazil Bruno JR Alves --- , Brazil Guilherme M Chaer --- , BrazilWe hypothesised that N inputs to the soil from residues of adult trees of Acacia mangium Willd. increase soil nitrate availability and consequently induce higher nitrous oxide (N2O) fluxes, irrespective of being in pure or mixed stands with Eucalyptus. A... -
Tropical wood species: alternative model to determine the characteristic compressive strength perpendicular to grain
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Arthur Filipe Freire Gomes --- Federal University of São Carlos (UFSCar), Brazil Fernando Júnior Resende Macarenhas --- Rua Luís Reis Santos - Pólo II, University of Coimbra, Portugal Diego Henrique de Almeida --- Federal University of São Carlos (UFSCar), Brazil Alfredo Manuel Pereira Geraldes Dias --- Rua Luís Reis Santos - Pólo II, University of Coimbra, Portugal Tulio Hallak Panzera --- Federal University of São João Del Rey (UFSJ), Brazil Francisco Antônio Rocco Lahr --- University of São Paulo (USP), Brazil André Luis Christoforo --- Federal University of São Carlos (UFSCar), BrazilBrazil has a vast area of native forests with the potential to be sustainably exploited for application in civil construction. Density is a key factor when analysing the characteristics of different wood species and their future uses, and additionally it...