1 CISTER Research Unit, ISEP/IPP, Rua Dr. Antonio Bernardino de Almeida 431, 4200-072 Porto, Portugal 2 Instituto de Telecomunicações, University of Beira Interior, 6201-001 Covilhã, Portugal 3 University ITMO, Saint-Petersburg 197101, Russia 4National University of Computer and Emerging Sciences, A. K. Brohi Road H-11/4, Islamabad 44000, Pakistan 5 Telecommunications Technological Centre of Ca...

Effect of the Culture Nutrients on the Biomass and Lipid Productivities of Microalgae Dunaliella tertiolecta Teresa M. Mata*, Ricardo Almeida, Nídia S. Caetano LEPAE – Laboratory for Process, Environmental and Energy Engineering, Faculty of Engineering, University of Porto (FEUP), R. Dr. Roberto Frias S/N, 4200-465 Porto, Portugal Department of Chemical Engineering, School of Engineering (ISEP)...

Photosynthetic vegetation (PV) and non-photosynthetic vegetation (NPV) are important ground cover types for desertification monitoring and land management. Hyperspectral remote sensing has been proven effective for separating NPV from bare soil, but few studies determined fractional cover of PV (f pv) and NPV (f npv) using multispectral information. The purpose of this study is to evaluate seve...

This study aims to estimate forest above-ground biomass and biomass components in a stand of Picea crassifolia (a coniferous tree) located on Qilian Mountain, western China via low density small-footprint airborne LiDAR data. LiDAR points were first classified into ground points and vegetation points. After, vegetation statistics, including height quantiles, mean height, and fractional cover we...

The magnetospheric physics research community uses a broad array of quantitative data-model comparison methods (metrics) when conducting their investigations. It is often the case, though, that any particular study will only use one or two metrics, with most common being Pearson correlation coefficient and root mean square error (RMSE). Because metrics are designed to test specific aspect relat...

Euphorbia thymifolia (Euphorbiaceae) is a prostrate herb, distinguished from similar species by the combination of serrate leaf margin, puberulous ovary/fruit with capitate styles and pedicel not accrescent in fruit, splitting involucre cyathia during maturation. In this paper we present first record E. for state Acre, Alto Juruá region, municipality Cruzeiro do Sul, residential sidewalk crack ...

Google Earth now hosts high-resolution imagery that spans twenty percent of the Earth's landmass and more than a third of the human population. This contemporary highresolution archive represents a significant, rapidly expanding, cost-free and largely unexploited resource for scientific inquiry. To increase the scientific utility of this archive, we address horizontal positional accuracy (geore...

Due to the high cost of traditional forest plot measurements, the availability of up-to-date in situ forest inventory data has been a bottleneck for remote sensing image analysis in support of the important global forest biomass mapping. Capitalizing on the proliferation of smartphones, citizen science is a promising approach to increase spatial and temporal coverages of in situ forest observat...

We introduce an e cient algorithm to compute the homomorphism induced in (relative) homology by a continous map. The algorithm is based ∗Research supported in part by NSF Grant 0107396 †Partially supported by the Polish Committee for Scienti c Research (KBN), grant no. 2 P03A 041 24. ‡Partially supported by the Polish Committee for Scienti c Research (KBN), grant no. 2 P03A 041 24. Permanent ad...