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| Campbell, Bruce; Center for International Forestry Research (CIFOR); b.campbell@cgiar.org; Sayer, Jeffrey A; WWF (World Wildlife Fund); jsayer@wwfint.org; Frost, Peter; Institute of Environmental Studies; pfrost@compcentre.uz.ac.zw; Vermeulen, Sonja; International Institute for Environment and Development; sonja.vermeulen@iied.org; Cunningham, Tony; World Wildlife Fund/UNESCO/Kew People and Plants Initiative; peopleplants@bigpond.com; Prabhu, Ravi; CIFOR Regional Office; r.prabhu@cgiar.org. |
| Assessing the performance of management is central to natural resource management, in terms of improving the efficiency of interventions in an adaptive-learning cycle. This is not simple, given that such systems generally have multiple scales of interaction and response; high frequency of nonlinearity, uncertainty, and time lags; multiple stakeholders with contrasting objectives; and a high degree of context specificity. The importance of bounding the problem and preparing a conceptual model of the system is highlighted. We suggest that the capital assets approach to livelihoods may be an appropriate organizing principle for the selection of indicators of system performance. In this approach, five capital assets are recognized: physical, financial, social,... |
| Tipo: Peer-Reviewed Reports |
Palavras-chave: Capital assets; Conceptual models; Decision support; Livelihoods; Modeling; Multivariate statistics; Natural resource systems; Performance; Zimbabwe. |
| Ano: 2001 |
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| Remor,Marcelo B.; Sampaio,Silvio C.; Model,Kathleen J.; Falco,Thais D.; Prudente,Victor H. R.. |
| ABSTRACT Many studies have determined the concentration of trace elements in river sediments in Brazil. Notwithstanding, mercury assessments are scarce, especially because of exclusive extraction techniques and expensive analysis techniques. Still, this element is known for its toxicity, persistence, and bioaccumulation, making its presence in the environment an important factor for biota and human health. For this reason, the objective of this study was to determine the mercury concentration in the sediment of the Pelotas River basin, located on the border of the states of Santa Catarina and Rio Grande do Sul. The sediment was collected at eight locations of the Pelotas basin and, after drying, the mercury was quantified by atomic absorption spectrometry... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Heavy metal; Trace element; Multivariate statistics. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162018000100117 |
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| Lopes,Fernando B.; Andrade,Eunice M. de; Meireles,Ana C. M.; Becker,Helena; Batista,Adriana A.. |
| The aim of this study was to identify spatial and temporal variations in water quality of Orós reservoir, Ceará, Brazil, as well as the sources of contamination. To get this information the Principal Component Analysis (PCA) and Cluster Analysis (CA) was used. Water samples were collected at seven (geo-referenced) points, from April 2008 to March 2011, totalling 4,032 samples. The following attributes of the waters were analysed: temperature, pH, CE, Ca2+, Mg2+, Na+, K+, Cl-, HCO3-, SO4--, turbidity, colour, Sechi transparency, TS, TVS, TFS, TSS, VSS, FSS, TDS, DO, BO5D, total phosphorus, soluble orthophosphate, EC, TTC, total ammonia, TKN, nitrate, SAR and chlorophyll-a. The PCA promoted the reduction from the 32 initial variables to 14, accounting for... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Water quality; Water pollution; Multivariate statistics. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662014000400012 |
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| Azevedo,Alcinei Mistico; Andrade Júnior,Valter Carvalho de; Pedrosa,Carlos Enrrik; Valadares,Nermy Ribeiro; Ferreira,Marcos Aurélio Miranda; Cecon,Paulo Roberto. |
| ABSTRACT Kale plants are usually sold “in natura” in street markets and malls. Kale leaves can have their appearance compromised by dehydration and discoloration due to increased post-harvest time exposure. We aimed to analyze the Global Stability Index (GSI) in kale accessions by means of repeated measurement analysis and curve grouping as a complementary form of superior sample identification with regard to post-harvest preservation. Thirty kale accessions were evaluated using a randomized block design with four blocks and five plants per plot. Two commercial leaves per plant were collected, and kept on workbenches in the shade at a temperature of 18 ± 1 °C. Subsequently, the degrees of discoloration and dehydration, total chlorophyll content, and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Brassica oleracea var. acephala DC; Post-harvest preservation; Repeated measurements; Multivariate statistics; Curve grouping. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162016000100079 |
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| Costa, Corrado; Sperandio, Giulio; Verani, Stefano. |
| Agricultural biomass supply chain consisting of multiple harvesting, storage, pre-processing, and transport operations. This network operates in space and time coordinates and produces empirical data used for many purposes, including wood-flow planning, harvesting cost calculation and work rate setting. The aim of this study was to explore and propose the use of a multivariate approach, namely, the Partial Least Squares (PLS) multivariate regression approach and compare its performance with the commonly used Ordinary Linear Regression (OLS). In particular, the study aimed at comparing the main statistical significance of indicators attributed to models calculated with OLS and PLS regressions from the same original datasets, for the purpose of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Harvesting; Biomass; Logistics; Machine costs; Multivariate statistics; Ordinary linear regression; Partial least square. |
| Ano: 2014 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/2910 |
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